Relevant bibliographies by topics / Filters and filtration

Academic literature on the topic 'Filters and filtration'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Filters and filtration.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Filters and filtration"

1

Девисилов, Vladimir Devisilov, Шарай, and E. Sharay. "Hydrodynamic Filtration." Safety in Technosphere 4, no. 3 (July 8, 2015): 68–80. http://dx.doi.org/10.12737/11885.

Full text
Abstract:
Prospects of hydrodynamic filters application are demonstrated through the review of current state of hydrodynamic filtering. Acknowledged schemes of hydrodynamic filters are Classified by 3 parameters: presence/absence of sludge liquid, frame and filter design, extra force field creation means. Advantages and disadvantages of every type of hydrodynamic filter are noted. Major attitudes to hydrodynamic filtering are considered with deterministic approach. Special attention is paid to hydrodynamic filters with flow vortex of “cylinder in cylinder” and “cylinder in cone” types. Promicing directions for further research of Hydrodynamic filtration are proposed.
APA, Harvard, Vancouver, ISO, and other styles
2

Hollings, P., M. J. Hendry, and R. Kerrich. "Sequential Filtration of Surface and Ground Waters from the Rabbit Lake Uranium Mine, Northern Saskatchewan, Canada." Water Quality Research Journal 34, no. 2 (May 1, 1999): 221–48. http://dx.doi.org/10.2166/wqrj.1999.010.

Full text
Abstract:
Abstract Major, trace and rare earth element analyses were conducted on water samples from four sites at the Cameco Rabbit Lake uranium mine in northern Saskatchewan, Canada. Samples were collected from the mill discharge, raise water, the tailings and an adjacent well. Water samples were sequentially filtered through 3.0-µm, 0.45-µm, 0.2-µm, 0.1-µm and 0.02-µm Millipore filters. Trace element and metal abundances were higher in unfiltered samples directly related to the tailings management facility (TMF) than the adjacent ground-water sample. The majority of the metals, including As and Ni, were trapped on the 3.0-µm filter, with the remainder of the metals in all four samples either in solution or transported by extremely small colloidal material (<0.02 µm). Filtration through a 3-µm filter resulted in a substantial decrease in the absolute abundances of the REE in the samples directly associated with the TMF; however further filtration through progressively finer filters did not result in detectable variations in REE abundances. In the TMF-related samples removal of suspended sediment by the 3-µm filter resulted in changes in the REE patterns which were not observed in subsequent filtrations. The well sample did not display major variations in REE abundances with filtration, reflecting the lower colloidal load in that sample. Consequently, filtration through 3.0-µm or 0.45-µm filters will remove the majority of colloidal material at the Rabbit Lake uranium mine.
APA, Harvard, Vancouver, ISO, and other styles
3

Zullo, Biagi Angelo, Giulia Venditti, and Gino Ciafardini. "Effects of the Filtration on the Biotic Fraction of Extra Virgin Olive Oil." Foods 10, no. 8 (July 21, 2021): 1677. http://dx.doi.org/10.3390/foods10081677.

Full text
Abstract:
Filtration is a widely used process in the production of extra virgin olive oil. We studied the influence of filtration performed with cotton filters and cellulose filter press on the biotic components of the oily mass containing probiotic traits in two freshly produced monocultivar extra virgin olive oils. The concentration of bacteria was reduced from 100% to 28%, while that of fungi was reduced from 100% to 44% after filtration, according to the filtration system and the initial contamination of the original monocultivar extra virgin olive oil. Compared with the control, the yeast content in the oil samples filtered with cotton filters was reduced from 37% to 11% depending on the cultivar. In the oil filtered with cellulose filter press, the yeast content reduced from 42% to 16%. The viable yeast that passed through the oily mass during the filtration process with cellulose filter press, unlike all the other samples, were unable to survive in the oil after a month of storage. The possible health benefits of compounds from both the biotic and abiotic fraction of the oil, compared to the control, were significantly low when filtered with the cellulose filter press.
APA, Harvard, Vancouver, ISO, and other styles
4

Tobiason, J. E., J. K. Edzwald, D. A. Reckhow, and M. S. Switzenbaum. "Effect of Pre-Ozonation on Organics Removal by In-Line Direct Filtration." Water Science and Technology 27, no. 11 (June 1, 1993): 81–90. http://dx.doi.org/10.2166/wst.1993.0267.

Full text
Abstract:
A pilot-scale study of the effects of pre-ozonation on the performance of in-line direct filtration was carried out. Performance measures included filtered water turbidity, unit filter run volumes, and organics in filtered waters: DOC, UV254, AOC and DBPs. Continuous operation of four dual media GAC/sand filters with and without pre-ozonation and chlorinated backwash and a dual media anthracite/sand filter were compared to full-scale performance. Pre-ozonation frequently results in longer filter runs, causes a twofold increase in raw water AOC and has little effect on raw water DOC. GAC/sand filters consistently reduced the AOC in the ozone train to levels below that of the full-scale plant and also provided 25 % lower DOC levels as compared to anthracite/sand filters. The effect of ozone and filtration on chlorinated DBPs followed overall DOC removal while DBPs created by ozonation followed AOC removal trends.
APA, Harvard, Vancouver, ISO, and other styles
5

Naddeo, V., and V. Belgiorno. "Tertiary filtration in small wastewater treatment plants." Water Science and Technology 55, no. 7 (April 1, 2007): 219–25. http://dx.doi.org/10.2166/wst.2008.148.

Full text
Abstract:
Tertiary filtration can be proposed in small wastewater treatment plants with impact on protected water bodies. Rotating disk filters may be adopted, in respect to conventional sand filters, when low availability of space and low investment costs are the prevailing conditions. The overall objective of this research was to evaluate the filtration efficiency of rotating disk filters; to compare effectiveness with traditional sand filters; to analyse thoroughly the importance of particle size distribution in wastewater tertiary filtration. In the experimental activity, conventional wastewater quality parameters were investigated and particle size distribution (PSD) was characterized to discuss the filter effectiveness. The effect of design and operation parameters of tertiary filters were discussed related to particle removal curves derived from particles counts. Analysis of particle size distribution can be very useful to help comprehension of filtration processes, design of filtration treatments and to decide the best measures to improve filter performance.
APA, Harvard, Vancouver, ISO, and other styles
6

Al Zubaidy, Riyadh Z., Mahmoud Al-Khafaji, and Riyadh J. M. Al-Saadi. "Rotating Ceramic Water Filter Discs System for Water Filtration." Journal of Engineering 23, no. 4 (March 31, 2017): 59–78. http://dx.doi.org/10.31026/j.eng.2017.04.04.

Full text
Abstract:
This work aimed to design, construct and operate a new laboratory scale water filtration system. This system was used to examine the efficiency of two ceramic filter discs as a medium for water filtration. These filters were made from two different ceramic mixtures of local red clay, sawdust, and water. The filtration system was designed with two rotating interfered modules of these filters. Rotating these modules generates shear force between water and the surfaces of filter discs of the filtration modules that works to reduce thickness of layer of rejected materials on the filters surfaces. Each module consists of seven filtration units and each unit consists of two ceramic filter discs. The average measured hydraulic conductivity of the first module was 13.7mm/day and that for the second module was 50mm/day. Results showed that the water filtration system can be operated continuously with a constant flow rate and the filtration process was controlled by a skin thin layer of rejected materials. The ceramic water filters of both filtration modules have high removal efficiency of total suspended solids up to 100% and of turbidity up to 99.94%.
APA, Harvard, Vancouver, ISO, and other styles
7

Lipowska, B., J. Witek, T. Wala, A. Karwiński, P. Wieliczko, M. Asłanowicz, and A. Ościłowski. "Cast Steel Filtration Trials Using Ceramic-Carbon Filters." Archives of Foundry Engineering 14, no. 4 (December 1, 2014): 61–66. http://dx.doi.org/10.2478/afe-2014-0087.

Full text
Abstract:
Abstract Trials of cast steel filtration using two types of newly-developed foam filters in which carbon was the phase binding ceramic particles have been conducted. In one of the filters the source of carbon was flake graphite and coal-tar pitch, while in the other one graphite was replaced by a cheaper carbon precursor. The newly-developed filters are fired at 1000°C, i.e. at a much lower temperature than the currently applied ZrO2-based filters. During filtration trials the filters were subjected to the attack of a flowing metal stream having a temperature of 1650°C for 30 seconds. Characteristic of the filters’ properties before and after the filtration trial were done. It was found, that the surface reaction of the filter walls with molten metal, which resulted in local changes of the microstructure and phase composition, did not affect on expected filter lifetime and filtration did not cause secondary contamination of cast steel.
APA, Harvard, Vancouver, ISO, and other styles
8

Fylypchuk, Viktor, Stanislav Induchny, Pete Pearce, Leonid Fylypchuk, and Serhii Martynov. "Application of expanded polystyrene filter for tertiary treatment of domestic waste effluent in the UK." Journal of Water and Land Development 35, no. 1 (December 1, 2017): 41–47. http://dx.doi.org/10.1515/jwld-2017-0066.

Full text
Abstract:
AbstractThe use of expanded polystyrene filters is a promising method for tertiary treatment of domestic waste effluent where biologically treated effluent is filtered through a layer of buoyant polystyrene beads. The advantage of such filters is in the absence of backwashing pumps, containers of clean washing water, while having low energy costs, high resistance of polystyrene to various chemical contaminants that may be in the effluent, easy automation of switching modes.The article describes the features of the design and principles of the expanded polystyrene filter operation with an upward filtration flow which works in automatic mode. The article includes the comparison of operation and the structural technological characteristics of polystyrene filters with disc filters, which are usually used in practice of tertiary-treatment of effluent in the UK.Experimental results were obtained from the operation of expanded polystyrene filters with an upward flow of filtration at two operational wastewater treatment plants. The effectiveness of the tertiary-treatment of waste effluent was evaluated by measures of BOD and COD in non-filtered and filtered samples, as well as total suspended solids during the months of the year and hours of the day. The filter demonstrated an average removal of 40% BOD, 28% of COD and 66% of TSS.
APA, Harvard, Vancouver, ISO, and other styles
9

Koláček, Stanislav, and Michal Černý. "Latest aspects of mechanical filtration." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, no. 5 (2013): 1535–42. http://dx.doi.org/10.11118/actaun201361051535.

Full text
Abstract:
The aim of this study was to describe and unify all knowledge about mechanic filtration. The first part deals with the parameters and properties of filtration. Here some important basic concepts are explained such as pressure gradient, filter life, etc. There’s also a description of convenient filtration technology for coarse and fine materials, such as sand, smoke or soot. The second part primarily focuses on the real use and application of filters for liquid and gaseous media. The differences in construction between different types of filters for filtration of fuels, oils, hydraulic fluids, air and cabin filters are described. The last section is focused mainly on new materials for the production of filters. These materials are ceramic or nanomaterials, which can actually be enriched for example with antibacterial silver or some fungicides.
APA, Harvard, Vancouver, ISO, and other styles
10

Rocha, Sandra Mara Santana, C. B. Vasconcelos, Luiz Gustavo Martins Vieira, M. L. Aguiar, and João Jorge Ribeiro Damasceno. "The Influence of the Velocity of Filtration in the Formation and Removal the Dust Cake." Materials Science Forum 660-661 (October 2010): 46–51. http://dx.doi.org/10.4028/www.scientific.net/msf.660-661.46.

Full text
Abstract:
The effective filtration area determined in a design of fabric filter depends on the filtration velocity, also known as air-to-cloth ratio that will be used. Low filtration velocities may demand big effective filtration areas. But then high filtration velocities may wear the filters out early. By searching for more efficient and economic equipments, this paper investigated the influence of the filtration velocity by formatting and removing the dust cake. Concluding that filtering at higher velocities a higher penetration of particles in the filter media occurs. Decreasing the filtration time and increasing the number which regenerates the cloth, consequently decreasing the life cycle of the filters.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Filters and filtration"

1

Moorthy, Kavitha. "EFFECT OF SURFACE ENERGY OF FIBERS ON COALESCENCE FILTRATION." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1185554340.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Agranovski, Igor Evgenevich, and n/a. "Filtration of Ultra-Small Particles on Fibrous Filters." Griffith University. School of Environmental Engineering, 1995. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050913.164528.

Full text
Abstract:
The problem of filtration of liquid aerosols by both wettable and nonwettable filters has been extensively studied and the results of the theoretical calculations together with the experimental results are presented. More realistic models of filtration by both wettable and nonwettable filters have been developed and verified experimentally. A new instrument has been developed, and used in the experiments, for the measurement of the absolute concentration of aerosols in the gas stream. This instrument is based on the measurement of the initial vapour content of the gas stream simultaneously with the measurement of the vapour content after the total evaporation of aerosol. The concentration of the aerosol is calculated as the difference between these two values. The instrument was developed to provide fast and accurate measurements of aerosol concentration. The main advantages of the instrument are: high accuracy, simplicity of measurement, possibility of use for a wide range of substances, perfect suitability of operation for automatic monitoring technologies, etc. All rights for this instrument have been reserved and the fully automatic version will be available in the near future. It was found that the efficiency of filtration of aerosol on the wettable filter depends on the thickness of the liquid film on the fibre. This parameter was taken into account in the development of a theoretical model of filtration on wettable fibrous filters. The particle breakthrough problem has been solved by the optimisation of the aspect ratio (the ratio of the height by width) of the wettable filter. On this basis, industrial devices have been developed, patented, and implemented in industry. These devices provide a stable operating efficiency of higher than 99%. It was found experimentally that the efficiency of filtration of aerosol on the nonwettable filter depends on the diameter of the drop suspended on the filter, and on the area of the filter blocked by drops: this influences the velocity of filtration. All these parameters were taken into account in the development of a theoretical model of filtration on nonwettable fibrous filters. On the basis of this model, satisfactorily verified by the experiments, an industrial device has been developed. The harnessing of atomisers makes it possible to maintain the efficiency of filtration higher than 99%, even with a relatively high velocity of filtration of 2.7m/s. The new technology is tackling the problem of handling huge amounts of exhaust gases and this is particularly important for cramped installations when the space available for the air pollution control technology is quite limited. A highly efficient gas cleaning technology has been developed. This technology is based on combining two stages (wet scrubber and filter) of currently utilised air pollution control devices by submerging the fibrous filter into the liquid on the plate. The new device provides an effective division of the main gas stream into ultra-small bubbles which increase the contact area between the gas and liquid phases. It was estimated theoretically and verified experimentally that the efficiency of the proposed 'combined' technology, is 45% higher than the efficiency of the two stages technology. The technology has been patented and will be offered for industrial implementation in the near future.
APA, Harvard, Vancouver, ISO, and other styles
3

Agranovski, Igor Evgenevich. "Filtration of Ultra-Small Particles on Fibrous Filters." Thesis, Griffith University, 1995. http://hdl.handle.net/10072/367392.

Full text
Abstract:
The problem of filtration of liquid aerosols by both wettable and nonwettable filters has been extensively studied and the results of the theoretical calculations together with the experimental results are presented. More realistic models of filtration by both wettable and nonwettable filters have been developed and verified experimentally. A new instrument has been developed, and used in the experiments, for the measurement of the absolute concentration of aerosols in the gas stream. This instrument is based on the measurement of the initial vapour content of the gas stream simultaneously with the measurement of the vapour content after the total evaporation of aerosol. The concentration of the aerosol is calculated as the difference between these two values. The instrument was developed to provide fast and accurate measurements of aerosol concentration. The main advantages of the instrument are: high accuracy, simplicity of measurement, possibility of use for a wide range of substances, perfect suitability of operation for automatic monitoring technologies, etc. All rights for this instrument have been reserved and the fully automatic version will be available in the near future. It was found that the efficiency of filtration of aerosol on the wettable filter depends on the thickness of the liquid film on the fibre. This parameter was taken into account in the development of a theoretical model of filtration on wettable fibrous filters. The particle breakthrough problem has been solved by the optimisation of the aspect ratio (the ratio of the height by width) of the wettable filter. On this basis, industrial devices have been developed, patented, and implemented in industry. These devices provide a stable operating efficiency of higher than 99%. It was found experimentally that the efficiency of filtration of aerosol on the nonwettable filter depends on the diameter of the drop suspended on the filter, and on the area of the filter blocked by drops: this influences the velocity of filtration. All these parameters were taken into account in the development of a theoretical model of filtration on nonwettable fibrous filters. On the basis of this model, satisfactorily verified by the experiments, an industrial device has been developed. The harnessing of atomisers makes it possible to maintain the efficiency of filtration higher than 99%, even with a relatively high velocity of filtration of 2.7m/s. The new technology is tackling the problem of handling huge amounts of exhaust gases and this is particularly important for cramped installations when the space available for the air pollution control technology is quite limited. A highly efficient gas cleaning technology has been developed. This technology is based on combining two stages (wet scrubber and filter) of currently utilised air pollution control devices by submerging the fibrous filter into the liquid on the plate. The new device provides an effective division of the main gas stream into ultra-small bubbles which increase the contact area between the gas and liquid phases. It was estimated theoretically and verified experimentally that the efficiency of the proposed 'combined' technology, is 45% higher than the efficiency of the two stages technology. The technology has been patented and will be offered for industrial implementation in the near future.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environmental Engineering
Faculty of Environmental Sciences
Full Text
APA, Harvard, Vancouver, ISO, and other styles
4

Ahmad, Rasheed. "Filtration and backwashing performance of biologically-active filters." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/21659.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tian, Chenguo. "Filtration of liquid aluminum with reticulated ceramic filters." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28932.

Full text
Abstract:
Fluid flow and filtration phenomena associated with filtration of liquid aluminum using reticulated ceramic filters were systematically investigated. It was found that fluid flow through this type of filter could be described by Darcy's Law up to a Reynolds number of 8, and the permeability of this type of filter ranged from about $9 times10 sp{-3}$ to $4 times10 sp{-2} rm mm sp2$.
Parameters affecting filtration processes during the initial period were identified, some of which could be quantified numerically using a 2-D computational domain. According to these numerical analyses, the clean filter coefficient for this type of filter was linearly dependent on the dimensionless Stokes velocity of the suspended particles, had a $-$0.96 power dependence on the Peclet number, a $-$6.93 power dependence on the effective porosity of the filter, and exhibited only a weak dependence on the Reynolds number, in the Darcy velocity regime.
The dynamic behaviour of this type of filter was analyzed theoretically and simulated numerically using newly proposed correlations relating the filter coefficient and the pressure drop to the amount of particles captured within the filter (the specific deposit), and a model describing the morphology of captured particles. The simulated results showed that the filtration efficiency and the pressure drop increased with inlet particle concentration and filtration time; these increases were however, insignificant when the inlet particle concentration was less than 1 ppm for filtration periods of two hours, however, when the inlet concentration (initial and continued) reached 10 ppm, the change became appreciable.
Experimental data, obtained from liquid aluminum filtration tests conducted by the author in both laboratory and industrial settings, compared favourably with the numerical results.
APA, Harvard, Vancouver, ISO, and other styles
6

Stephen, Christopher Mark. "Filtration and cleaning behaviour of rigid ceramic filters." Thesis, University of Surrey, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ying, Tung-Yu. "Magnetically-seeded filtration of colloidal particles." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/20229.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Munholand, Luke. "Filtration à haute température avec des chandelles céramiques = High temperature filtration with ceramic candle filters." Sherbrooke : Université de Sherbrooke, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Aliouane, Kamel. "Contribution à l'étude du filtrage d'harmoniques des réseaux de distribution à l'aide de l'association de filtres actif et passif parallèle." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL012N.

Full text
Abstract:
Cette thèse est consacrée à l'étude de l'association d'un filtre actif avec un filtre passif. Cette association peut conduire à une augmentation sensible des performances de filtrage ainsi que des potentialités d'application. Différentes structures sont envisageables, mais les deux configurations retenues (filtre actif en série avec l'alimentation ou en série avec le filtre passif) conduisent à un dimensionnement réduit du filtre actif, tout en assurant de bonnes performances de filtrage. Dans les deux cas, le filtre actif ne fonctionne pas comme un compensateur d'harmoniques. Il joue le rôle d'isolateur d'harmoniques, s'opposant en particulier aux phénomènes de résonance. C’est la raison pour laquelle il nécessite une plus faible puissance comparée à la puissance d'un filtre actif parallèle. Afin de valider l'étude effectuée, une maquette expérimentale monophasée de puissance réduite a été développée. Elle a permis de montrer que les caractéristiques de filtrage sont indépendantes de l'impédance de source et que les performances du filtre passif sont nettement améliorées
APA, Harvard, Vancouver, ISO, and other styles
10

Evans, Helen L. "Particle removal within biological water treatment filters." Thesis, University of Surrey, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298089.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Filters and filtration"

1

Dickenson, T. Christopher. Filters and filtration handbook. 4th ed. Oxford, U.K: Elsevier Advanced Technology, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sutherland, Ken. Filters and filtration handbook. 5th ed. Oxford: Elsevier, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Dickenson, T. Christopher. Filters and filtration handbook. 3rd ed. Oxford, U.K: Elsevier Advanced Technology, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Corporation, Parker Hannifin, ed. Filtration technology. Cleveland, OH: Parker Hannifin Corp., 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Engineers, Society of Automotive, and SAE World Congress (2007 : Detroit, Mich.), eds. Automotive filtration. Warrendale, PA: Society of Automotive Engineers, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Joseph, James J. Coolant filtration. East Syracuse, N.Y. (P.O. Box 232, East Syracuse 13057): Joseph Marketing, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ginestet, Alain, Paolo Tronville, and Marko Hyttinen. Air filtration in HVAC systems. 2nd ed. Brussels, Belgium: REHVA, Federation of European Heating, Ventilation and Air-conditioning Associations, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Huishi, Li. Zariskian filtrations. Dordrecht: Kluwer Academic Publishers, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

(Firm), Elsevier Advanced Technology, ed. Profile of the international filtration and separation industry. 2nd ed. Oxford, U.K: Elsevier Advanced Technology, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Frederick, Edward R. Utilizing electrical effect in nonaqueous filtration. Pittsburgh, PA (294 Sunset Rd., Pittsburgh 15237): Filter Media Specification, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Filters and filtration"

1

Flatt, Werner. "Filtration Plants." In Dust Collection with Bag Filters and Envelope Filters, 180–269. Wiesbaden: Vieweg+Teubner Verlag, 1988. http://dx.doi.org/10.1007/978-3-663-07900-2_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Werzner, Eric, Miguel A. A. Mendes, Cornelius Demuth, Dimosthenis Trimis, and Subhashis Ray. "Simulation of Fluid Flow, Heat Transfer and Particle Transport Inside Open-Cell Foam Filters for Metal Melt Filtration." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 301–33. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_13.

Full text
Abstract:
AbstractIn order to develop improved filters for metal melt filtration, different physical phenomena that take place during depth filtration of liquid metals need to be well understood. Due to the difficult accessibility of the process, the harsh process conditions and the randomness of the typically employed ceramic foam filters, representative experimental investigations are extremely difficult to perform and often provide only integral quantities or selective information. This chapter presents a numerical model for simulating the depth filtration of liquid metal at the pore-scale, i.e., fully resolving the complex filter geometry, which can also accurately handle the curved filter walls. In the model, the velocity and pressure distribution of the melt flow is obtained by the lattice-Boltzmann method and the temperature field is calculated using the finite volume method, while the transport and filtration of the inclusions are predicted by solving the equation of motion for particles in a Lagrangian reference frame. In order to obtain a consistent representation of the curved filter walls for both particle transport and fluid flow, the Euclidean distance field of the filter structures is employed. By comprehensive parametric studies, the sensitivity of the filtration process with respect to various geometric parameters and process conditions is investigated. Therefore, geometries of conventionally manufactured filters, acquired from 3D μCT scanning, as well as computer-generated filter structures are considered. Their performance is assessed by evaluating various effective properties, such as the viscous and inertial permeability and the filtration coefficient. The numerical predictions allow to draw conclusions with respect to the dominant physical mechanisms and are compared with those from simplified physical models, which are shown to be sufficiently accurate for the pre-screening of filters. On the basis of the detailed results, suggestions for improved filter geometries are made, depending on the considered filtration process. Further, simplified models for the prediction of the effective thermal conductivity of open-cell foams in presence and absence of radiation are presented and validated using the detailed numerical predictions.
APA, Harvard, Vancouver, ISO, and other styles
3

Voigt, Claudia, Tony Wetzig, Jana Hubálková, Patrick Gehre, Nora Brachhold, and Christos G. Aneziris. "Ceramic Filter Materials and Filter Structures with Active and Reactive Functional Pores for the Aluminum Melt Filtration." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 57–82. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_3.

Full text
Abstract:
AbstractThe application of ceramic foam filters is state of the art in the casting of aluminum melt. Despite their industrial use since the 1960s, the filtration mechanisms are not fully understood. The Collaborative Research Center 920 investigated the influence of the filter surface chemistry and wetting between filter and melt on the filtration efficiency. The investigated filter surfaces based on Al2O3, MgAl2O4, 3Al2O3·2SiO2and TiO2 showed differences in the filtration efficiency and the wetting behavior whereby a good correlation for inclusions smaller than 110 µm was found–the larger the contact angle the higher the filtration efficiency. The results raised the question whether the intrinsic contact angle or the different roughness of the materials caused the changes in the filtration efficiency. A filtration trial at the Hydro pilot filtration line revealed a strong influence of the filter surface roughness on the filtration efficiency. A filter coated with Nano-Al2O3, with a divergent intrinsic contact angle compared to be Al2O3 reference filter, showed no improvement of the filtration behavior indicating no influence of the intrinsic contact angle on the filtration.
APA, Harvard, Vancouver, ISO, and other styles
4

Wetzig, Tony, Andreas Baaske, Sven Karrasch, Steffen Dudczig, and Christos G. Aneziris. "Cleanness of Molten Steel—Active and Reactive, Exchangeable Filter Systems for the Continuous Casting of Steel." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 741–68. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_29.

Full text
Abstract:
AbstractThe filtration of steel melts in the continuous casting of steel is of special interest in order to meet the ever-increasing purity requirements regarding the metal’s purity. Due to the high mass flow and the high casting duration, the application of in-built filters in the tundish system is rather challenging, especially regarding the filter capacity. In the framework of this contribution, a new concept involving the immersion of filters into the steel melt from above the tundish was investigated. This approach allows for the flexible exchange of used filters without interruption of the underlying process. At the Institute of Ceramics, Refractories and Composite Materials, carbon-bonded alumina filters on the basis of established slurry compositions and modified replication techniques were scaled up for the industrial application in continuous casting of steel. The best property profile was observed for a triple coating approach based on centrifugation, dip coating and spray coating. In the tundish of a steel casting simulator, a lab-scale casting test was conducted in order to check the thermos-mechanical behavior of the filter in contact with molten steel. After the successful evaluation in lab scale, the filters were tested in industrial trials in cooperation with the company thyssenkrupp Steel Europe AG. A ladle casting with immersed filter lasted approximately 45 min with a static casting speed of 8 to 10 t/min and a melt temperature of above 1550 °C. The filters were analyzed for inclusions and potential damage at the Institute of Ceramics, Refractories and Composite Materials. Dense clogging layers on the filter surface were identified as in-situ layers as usually observed in lab-scale steel casting simulator tests in consequence of reactive filtration effects. Furthermore, inclusion clusters which were removed at the filter bottom due to the direct inflow in consequence of the buoyancy were observed as signs of active filtration. A further alternative to foam filters is presented by gel-cast spaghetti filter structures with mechanically robust full-strut structure. In the subproject T01K, the gel casting process was optimized in order to realize the necessary upscaling of the components. With the aid of alginate-based gel casting, spaghetti filter with organized lattice structures were manufactured and tested. Steel casting simulator trials showed favorable behavior in contact with the melt.
APA, Harvard, Vancouver, ISO, and other styles
5

Daus, Sarah, Lisa Ditscherlein, Daniel Hoppach, and Urs A. Peuker. "Metal Melt Filtration in a Water-Based Model System Using a Semi-automated Pilot Plant: Experimental Methods, Influencing Factors, Models." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 275–99. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_12.

Full text
Abstract:
AbstractEven though ceramic foam filters for metal melt filtration have been used in the casting industry for many decades, the filtration mechanisms have not yet been satisfactorily determined. Due to the opaqueness of the melt and the need for high operating temperatures as well as the complexity of the aluminum casting process, filtration experiments are expensive and a detailed insight into the filtration process is hardly achievable. However, the analysis by means of a model system contributes to an essential understanding of the processes taking place. Metal melt systems are characterized by their high surface tension resulting in poor wettability of the solid surfaces in contact with the liquid melt. Therefore, the model system needs to exhibit both similar flow characteristics and wetting properties as the melt system to obtain reliable results. In this study, water was used as the model liquid and the wetting properties of the solid surfaces have been modified to mimic the characteristic wetting behavior of the melt-filter interface. The influence of filter and particle properties as well as process parameters on the filtration efficiency of ceramic foam filters have been investigated. In order to minimize possible overlapping effects in the determination of individual parameters influencing the separation efficiency, care was taken to vary only one parameter, so that the filtration is only dependent on one variable. Besides water-based filtration experiments, it is also possible to have a closer look on interaction forces between inclusion particles and the filter wall and how a higher filtration efficiency can be achieved. Here, too, a water-based model system is beneficial due to the same issues of available devices and costs.
APA, Harvard, Vancouver, ISO, and other styles
6

Fankhänel, Beate, Ekaterina Schmid, and Michael Stelter. "Influence of Reactive Filter Materials on Casting’s Quality in Aluminum Casting." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 215–39. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_9.

Full text
Abstract:
AbstractThis chapter presents the most important results of investigations on reactive filter materials for the purification of aluminum melts. Reactive filter materials were developed with the aim to remove impurities dissolved in the melt, such as hydrogen from liquid aluminum, by means of specific chemical interactions between the molten metal and the filter material. Selected ceramic foam filters, consisting of carbon-free and carbon-bonded ceramics, were used in their uncoated state as well as treated with various coatings. Numerous fundamental studies were carried out to evaluate the applicability of the new filter materials: sessile-drop-experiments, immersion and filtration tests, the metallographic evaluation of the used filters and the metal samples retrieved from these experiments. Interfacial reactions and the purity of the treated melts were determined with the help of these experiments, following microstructural analyses to obtain indications for the filtration properties and the potential chemical reactions between the filter material and the melt. As a result, it was possible to determine that spodumene, LiAl(Si2O6), positively influences the hydrogen porosity of aluminum castings when applied as a reactive filter material. Filtration alone already helps to prevent areas of increased macroporosity by calming the melt flow, but filter materials containing spodumene further affect microporosity in the castings in positive ways.
APA, Harvard, Vancouver, ISO, and other styles
7

Baumann, Benedict, Andreas Keßler, Claudia Dommaschk, and Gotthard Wolf. "Influence of Filter Structure and Casting System on Filtration Efficiency in Aluminum Mold Casting." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 723–40. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_28.

Full text
Abstract:
AbstractCeramic foam filtershavebeen usedin aluminum foundries since 1974 to increase the purity of the melt. In practice, the implementation of the foam ceramic filter in the casting system is in most cases a question of space on the pattern plate. It does not follow any defined rules but is at best guided by design recommendations from the filter manufacturers. To increase the filtration efficiency, the filter position in the casting system is examined. For this, 20 and 30 ppi filters were scanned with computer tomography (CT). The data from the CT were then loaded into the simulation program Flow 3D. With this program, four different filter positions as well as the influence of the filter length and roughness of the filter surface are investigated concerning their filtration effectiveness. The simulation results are subsequently evaluated with casting trials. For this, four different molds for four different filter positions were created. The same alloy (AlSi7) was used for the trials as for the simulation. To study the behavior of particles during the filtration process, impurities were added to the melt using 3 wt.% Al2O3 - Metal Matrix Composite. After the samples were casted, the filters are cut out and the Al2O3 particles in the filter are counted for each filter position. The comparability of the casting trials and the results of the simulation have been examined.
APA, Harvard, Vancouver, ISO, and other styles
8

Schramm, Alina, Christos G. Aneziris, and Christiane Scharf. "Novel Ceramic Foam Filter Materials for the Filtration of Magnesium Alloy Melts." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 241–55. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_10.

Full text
Abstract:
AbstractCleanliness of magnesium alloy melts plays an important role in producing high-quality, lightweight products exemplary for the automotive or aircraft industry with high-quality standards. Therefore, the applicability of ceramic foam filters in the active and reactive filtration of magnesium alloys was explored as an option of metallurgical refining. Carbon-bonded alumina foams were selected in their uncoated as well as variously coated states. To evaluate the applicability of selected ceramic filter materials, various tests were applied, investigating filter properties, interface interactions, melt cleanliness and wetting behavior of the filter, such as sessile drop tests, immersion and filtration tests, and metallographic evaluation of AZ91. Immersion tests in AZ91 at 680 °C for up to 60 min showed the durability of coated and uncoated Al2O3-C and the formation of finely-structured MgO in-situ layers on any alumina- or spinel-containing surfaces in contact with molten AZ91. These layers, resulting from interface reactions with the melt, are regarded to have the potential to attract and bind oxidic inclusions from the metallic melt during filtration, as AZ91 samples showed reduced inclusion amounts after their contact with Al2O3-C filters. Another milestone was the synthesis of MgAlON as a filter coating, proven to be resistant towards the reactive magnesium alloy melt.
APA, Harvard, Vancouver, ISO, and other styles
9

Dudczig, Steffen, Enrico Storti, and Christos G. Aneziris. "Registration of Filtration Efficiency of Active or Reactive Filters in Contact with Steel Melt in a Steel Casting Simulator." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 489–517. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_19.

Full text
Abstract:
AbstractAspecial metal-casting simulator allowed to investigate the behavior of nozzles and filters in contact with a steel melt under controlled atmosphere. First, the clogging of carbon-bonded alumina nozzles with different active or reactive coatings was evaluated by introducing exogenous inclusions while monitoring the changes in melt flow with time. In addition, the microstructure of the nozzles was investigated by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy to assess the coating decomposition and phase transformations. In further approaches, endogenous inclusions were generated in situ by pre-oxidizing and deoxidizing the steel melt. Filters with different active and reactive coatings were immersed for different times in order to investigate the evolution of newly formed phases on the filter surface as well as characterize their cleaning performance based on the analysis of the solidified steel. The inclusions in the frozen steel melt were characterized with the aid of an automatic SEM – ASPEX-system, which identified the chemistry as well as the size and population of the inclusions. In the last approach, investigations of a new combined refining process based on the immersion of reactive filters and a subsequent filtration via carbon-free active filters was investigated, in order to remove the remaining clusters of inclusions.
APA, Harvard, Vancouver, ISO, and other styles
10

Heisig, Lisa-Marie, Katrin Markuske, Rhena Wulf, and Tobias Michael Fieback. "Characterization of Heat Transport and Diffusion Processes During Metal Melt Filtration." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 335–60. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_14.

Full text
Abstract:
AbstractThis chapter contains a summary of thermodynamic investigations of ceramic filters, metal melts and their interaction, which can serve as a basis for the optimization of the filters as well as the casting and metal melt filtration process. First, the thermophysical properties of two different filter base materials are briefly discussed. Subsequently, after demonstrating measurement conditions and parameters, the effective thermal conductivities of filters with varying pore size, porosity and material measured by the Transient-Plane-Source method at temperatures up to 700 °C are presented. The experimental determination of radiative properties of the filters using a Fourier-transform infrared spectrometer with an external integrating sphere was compared to simple predictive methods. Finally, after performing experiments with air, a measurement section was created and further developed to determine the volumetric heat transfer coefficient during metal melt filtration. The first results obtained with aluminum melt are presented.In addition to the knowledge of heat transport processes, the understanding of the sorption and diffusion behavior of various gases in metal melts is important. Therefore, a thermogravimetric apparatus, which enables the direct determination of the mass changes caused by (ab-)sorption using a high-precision magnetic suspension balance, was modified especially for this measurement task.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Filters and filtration"

1

Schmitz, Stefan, and Ru¨diger Lennartz. "Filtration of Lubrication Oil in Railway Applications." In ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1442.

Full text
Abstract:
Traditional designs, using cartridge filters for full-flow filtration, protect medium speed and high speed diesel engines from wear and keep the concentration of abrasive particles in the oil system down by collecting them out of the circulating oil flow. After several hundred running hours the filtration surface is saturated, the cartridges get exchanged and disposed. State of the art automatic filters protect the engines against wear with the same efficiency as the cartridge filters but the backflushing mechanism keeps the filtration surface clean and the lubrication circuit remains maintenance free. The lifetime of filter elements lasts during time before overhaul (TBO) of the engine itself and is at least 24,000 hrs. The job to discharge the particles out of the system is done by highly efficient centrifugal oil cleaners in by-pass operation which separate not only the particles retained by the automatic filter but also very fine solids like soot. Figure 1 shows an automatic filter in cooperation with two centrifugal oil cleaners build into the silhouette of the engine.
APA, Harvard, Vancouver, ISO, and other styles
2

Wilcox, Melissa, Nathan Poerner, Rainer Kurz, and Klaus Brun. "Development of Test Procedure for Quantifying the Effects of Salt and Water on Gas Turbine Inlet Filtration." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69847.

Full text
Abstract:
Inlet filtration on a gas turbine strongly influences the performance degradation and life of the turbine. The inlet filtration system must have a diverse set of stages to remove the contaminants present in various phases (gas, liquid, and solid). Filters for gas turbine filtration systems are currently classified using one of three standards: ASHRAE 52.2, EN 779, or EN 1822. These standards measure the performance of filters in the dry state and do not consider the performance of the filter when wet (saturated with water). Many locations where gas turbines operate, experience conditions where the filter can be dampened or saturated which can significantly influence the filter’s performance. In addition, if soluble particles, such as sodium chloride, are captured by the filter, then there is a potential for the soluble particles to be carried by the water through the filter and into the gas turbine. In order to understand the performance of a filter with water present, a procedure is being developed. This procedure intends to quantify the effects of water and salt on the performance of filters. The procedure has been written, and a series of preliminary validation tests have been completed. The results of the preliminary validation testing show that a change can be observed in the filter’s performance when salt and water are introduced into the flow stream. In addition, the preliminary validation testing revealed many areas where the test procedure could be improved.
APA, Harvard, Vancouver, ISO, and other styles
3

Stanley, Ian, and Stefan Schmitz. "Advances in Filtration in Automatic Lube Oil Filters." In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6135.

Full text
Abstract:
In 2006 an automatic lube oil filtration system with an automatic backflushing filter and a centrifuge for diesel locomotives was presented at the ASME Spring Technical Conference [1]. The filter cleans itself continuously and the system can be used instead of conventional disposable paper filters to reduce servicing requirements, improve oil cleanliness and reduce the oil system’s exposure to contaminants. In 2015 at the ASME Fall Technical Conference, a development of the system was presented that introduced an electric pump to boost both centrifuge and automatic filter performance at lower engine speeds, as seen during locomotive idling or coasting. The next development addresses the automatic filter mesh, something that has not improved substantially over the last 20 years. The main challenge with improving the mesh for a backflushing filter has been balancing the filtration grade with self-cleaning performance. By going to a finer mesh that catches ever smaller particles, the filter element tends to become more difficult to backflush. For a given wire diameter the free flow area also decreases when the openings become smaller, reducing the maximum mesh loading. Reducing the diameter of the wire used increases the free flow area, but makes the mesh more fragile and difficult to weld. A recent advancement in the mesh design now allows the automatic filter to filter the oil to a much finer degree than was previously possible while maintaining high self-cleaning performance. The filtration performance was evaluated by using the multi-pass method according to ISO 16889, while the backflushing performance was evaluated on our in-house test stand. Currently these elements are being field tested. Being able to filter and separate much smaller particles is expected to reduce long term engine wear and, in certain cases, improve oil life.
APA, Harvard, Vancouver, ISO, and other styles
4

Madsen, Stian, Jørn Watvedt, and Lars E. Bakken. "Gas Turbine Fouling Offshore: Air Intake Filtration Optimization." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75613.

Full text
Abstract:
Optimized operation of gas turbines is discussed for a fleet of eleven LM2500PE engines at a Statoil North Sea offshore field in Norway. Three engines are generator drivers while eight engines are compressor drivers. Several of the compressor drive engines run at peak load (T5.4 control), hence production rate is limited by the available power from these engines. The majority of the engines discussed run continuously without redundancy, hence gas turbine uptime is critical for the field’s production and economy. The performance and operational experience with upgraded inlet air filter systems, as well as successful operation at longer maintenance intervals and higher average engine performance are described. For North Sea operation, a key property of the filter system is the ability to handle high humidity and high salt-content, typical of the harsh environment in these waters. The upgraded filter system analyzed in this paper is a 2-stage system (vane separator stage upstream of the high-efficiency filter stage), which is a simplified design versus the old traditional 3-stage systems (louvre upstream and vane separator downstream of the filter stage). These 2-stage systems rely on an efficient upstream vane separator to remove the vast majority of water from the airflow before it reaches the high-efficiency filters. The high-efficiency filters are specially designed to withstand moisture. The effectiveness and contribution of each component in the filtration system are described. Extensive testing of both new and used filter elements, of different filter grade and operated at different intervals, has been performed in a filter test rig facility onshore. Extensive testing of used filters has also been performed at the filter OEM, where filter efficiency is measured as well as destructive testing and analysis of the filter layers. The effect of an optimized air intake filter system for the subject engines, is longer operating intervals, higher power availability and lower engine deterioration. The operating intervals are now extended to six months (4,000 hours), from initially two months (1,500 hours, early 1990s) then four months (3,000 hours, mid 2000s). The HPC efficiency deterioration is reduced by some 3% related to intake filter system, of a total of over 6% in efficiency deterioration over each 6-month operating period.
APA, Harvard, Vancouver, ISO, and other styles
5

Farooq, Khalid, and Meghdoot S. Arwindekar. "Filtration of Gas Turbine Lube Fluid Using Anti-Static Filters." In ASME 2012 Gas Turbine India Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gtindia2012-9685.

Full text
Abstract:
Requirement for higher turbine performance and lower costs has resulted in smaller lubrication and control fluid systems operating at higher cleanliness levels, thus requiring higher fluid flux and finer filtration levels. Triboelectric Charge (TEC) generation by fine filters and its eventual discharge is considered to be a source of lubricating fluid breakdown and the resulting formation of resinous byproducts. These fluid breakdown byproducts form deposits or ‘varnish’ on the metallic surfaces causing servo-valve stiction along with other adverse consequences. TEC generation occurs in fluid systems as a result of friction between the fluid and mainly the filtration media fibers. The friction causes charge separation between the filtration medium and the fluid, with the fluid oppositely charged to the filtration medium. The magnitude of charge generated depends on many interrelated factors, including the nature of the filter material and the fluid, fluid velocity, viscosity, conductivity and the contact area. The electrostatic discharge manifests itself in several ways, the most easily noticeable way being an audible clicking noise as the discharge of the accumulated electrostatic charge causes sparking internally within the system. In addition to lubricant degradation and varnish formation, the electrical charge can travel downstream with the fluid causing damage to system components, including the filter. There have been reports of heat exchanger damage, located downstream of the filters, due to the electrostatic charging of the fluid. The use of metal support meshes or other methods to dissipate the electrostatic charge to prevent its build-up in the filter cartridge may prevent the discharge within the filter assembly and the resulting filter damage, but it does not prevent the charging of the fluid, and the migration of the charge downstream causing damage to the fluid and the downstream components. In 2005 Pall Corporation introduced filter cartridges that mitigate charge generation and dissipate the small charge generated at its inception, thus offering the advantage of eliminating filter damage entirely, and significantly reducing the migration of the charge into the fluid and its associated damage to the fluid and the resulting varnish formation. This paper discusses the experience with the electrostatic charge dissipating filtration for the gas turbine lubrication application.
APA, Harvard, Vancouver, ISO, and other styles
6

Schroth, Thomas, Antje Rudolph, and Carl Freudenberg. "Newly Developed Filter Products for Gas Turbine Intake Air Filtration." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-517.

Full text
Abstract:
The newly developed depth-loading filter types MaxiPleat filter and depth-loading filter cartridge offer gas turbine users numerous advantages in terms of clean air quality in the combustion air, cost-efficiency due to favourable pressure drop, long life and high functional reliability over the entire operating period. The MaxiPleat filters fitted with a paper-like filter medium are produced by using the patented thermal embossing process, distinctive for its solution to the spacing problem. Without using any foreign materials as separators, depths of 250 mm can be achieved in pleating, with V-shaped, flow-optimized pleat geometries. This ensures low pressure drops and high dust holding capacities. The depth-loading filter cartridge is intended as a replacement filter for surface-loading filter cartridges given unsatisfactory results. A conventional pulse-jet system can be converted to a depth-loading filter without any expensive modification. The depth-loading filter cartridge extends substantially the useful life of the filters and significantly improves the pressure drop characteristics, especially when sticky dusts and high humidity locations are involved.
APA, Harvard, Vancouver, ISO, and other styles
7

Han, Xu, Jussi Välimaa, Abdullokh Orifjonov, Damiano Padovani, and Tatiana Minav. "Investigating the Filtration Characteristics of Direct Driven Hydraulics." In ASME/BATH 2021 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/fpmc2021-70614.

Full text
Abstract:
Abstract Direct driven hydraulics (DDH) is receiving increasing attention due to its advantages such as high energy efficiency, easy maintenance, and compactness. However, its oil contamination management has not been surveyed in detail, whereas uncontrolled oil contamination might result in extra maintenance efforts or even downtime. Therefore, this research paper analyzes the oil filtration in direct driven hydraulics through modeling and simulation to predict the filtration effects and support the filtration design. Firstly, model blocks of the filtration characteristics are built to be added to the basic DDH dynamic model. The model can hereby include the coupling effects between fluid degradation and component wear, the filtering process, and the time-varying filter performance. Secondly, the proposed model is applied to a DDH that incorporates filtration and simulated under a duty cycle for 960 hours. The DDH efficiency and control performance when considering the contaminant are revealed. Thirdly, the results are compared between different filter selections and a filtration solution is finally proposed. In conclusion, this paper illustrates the filtration effects on the efficiency, control performance, and oil contaminant level of DDH by simulation, which can hereby support the design of the DDH filtration solution. According to the simulations, the filtered DDH resulted in 96% degradation of the pump’s volumetric efficiency after 960-hour running compared to 92% when not using any filters. The extra pressure drop introduced by the filter is below 2 bar, suggesting that the introduction of a filter with 6 μm filtration level is beneficial.
APA, Harvard, Vancouver, ISO, and other styles
8

Greenlee, Alison, Timothy Murray, Victor Lesniewski, Mark Jeunnette, and Amos G. Winter. "Design and Testing of a Low-Cost and Low-Maintenance Drip Irrigation Filtration System for Micro-Irrigation in Developing Countries." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35351.

Full text
Abstract:
The cylindrical filters presently used in <1000 m2 drip irrigation systems are frequently clogged, increasing pressure loss and lowering the flow rate through the filters. This work investigates the mechanisms for this clogging and proposes an alternative filtration design that would enable both more reliable and lower maintenance filtering. This proposed system is compatible with existing drip irrigation systems and could be made inexpensively with plastic bottle manufacturing equipment. To compare the proposed design to off-the-shelf options, a drip irrigation test setup was built to measure the pressure loss across different filters as particles accumulated. These experiments confirmed that pleated cartridge filters, with high effective surface area, incurred lower pressure losses than cylindrical filters. These tests revealed that the greatest reason for clogged performance was that filtered particles (not the cartridge filter itself) eventually restricted the flow of water through the system. This inspired the redesign of the filter housing such that the housing extended far below the filter, providing a catch basin away from the filter for the particles to settle. Fixing the filter independently of the bottom casing significantly improved the overall performance of the filtration system, reduced the maintenance requirement necessary from the user, and would enable inexpensive manufacturing via blow molding. This paper experimentally demonstrates that the cartridge filter inside the redesigned housing can filter out over 2 kg of sand while maintaining less than a .03 bar pressure drop across the filter at a flow rate of 25 l/s.
APA, Harvard, Vancouver, ISO, and other styles
9

Al-Hajeri, M., A. Aroussi, and S. J. Pickering. "Study of the Filtration Process Through a Ceramic Candle Filter." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-229.

Full text
Abstract:
Ceramic candle filters have been developed for cleaning high-temperature high-pressure (HTHP) gas streams. They meet environmental and economical considerations in Combined cycle power plant, where gas turbine blades can be protected from the erosion that occurs due to using HTHP exhaust from the fluidized bed. Ceramic candle filters are the most promising hot gas filtration technology, which has demonstrated high collection efficiencies at high-temperature high-pressure conditions. This paper reports a computational fluid dynamics (CFD) investigation of a candle filter. Constant filtration velocity boundary models have been used to investigate the filter in cross flow conditions using the CFD code FLUENT. Different approach (inlet) velocity to filter face velocity ratios and different face velocities (ranging from 2 to 5 cm/s) are used in the CFD calculation. Particles in the diameter range 1 to 100 microns are tracked through the domain. The radius of convergence (or the critical trajectory) is compared and plotted as a function of many parameters. The deposition process and the factors that affect the build up of the filter cake have also been studied.
APA, Harvard, Vancouver, ISO, and other styles
10

Al-Hajeri, M., A. Aroussi, and S. J. Pickering. "Study of the Filtration Process Through a Ceramic Candle Filter." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-354.

Full text
Abstract:
Ceramic candle filters have been developed for cleaning high-temperature high-pressure (HTHP) gas streams. They meet environmental and economical considerations in Combined cycle power plant, where gas turbine blades can be protected from the erosion that occurs due to using HTHP exhaust from the fluidized bed. Ceramic candle filters are the most promising hot gas filtration technology, which has demonstrated high collection efficiencies at high-temperature high-pressure conditions. This paper reports a computational fluid dynamics (CFD) investigation of a candle filter. Constant filtration velocity boundary models have been used to investigate the filter in cross flow conditions using the CFD code FLUENT. Different approach (inlet) velocity to filter face velocity ratios and different face velocities (ranging from 2 to 5 cm/s) are used in the CFD calculation. Particles in the diameter range 1 to 100 microns are tracked through the domain. The radius of convergence (or the critical trajectory) is compared and plotted as a function of many parameters. The deposition process and the factors that affect the build up of the filter cake have also been studied.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Filters and filtration"

1

Beckman, Ivan. Development of alternative air filtration materials and methods of analysis. Engineer Research and Development Center (U.S.), June 2023. http://dx.doi.org/10.21079/11681/47188.

Full text
Abstract:
Development of high efficiency particulate air (HEPA) filters demonstrate an effort to mitigate dangerous aerosol hazards at the point of production. The nuclear power industry installs HEPA filters as a final line of containment of hazardous particles. An exploration of analytical, experimental, computational, and machine learning models is presented in this dissertation to advance the science of air filtration technology. This dissertation studies, develops, and analyzes alternative air filtration materials and methods of analysis that optimize filtration efficiency and reduce resistance to air flow. Alternative nonwoven filter materials are considered for use in HEPA filtration. A detailed review of natural and synthetic fibers is presented to compare mechanical, thermal, and chemical properties of fibers to desirable characteristics for air filtration media. Digital replication of air filtration media enables coordination among experimental, analytical, machine learning, and computational air filtration models. The value of using synthetic data to train and evaluate computational and machine learning models is demonstrated through prediction of air filtration performance, and comparison to analytical results. This dissertation concludes with discussion on potential opportunities and future work needed in the continued effort to advance clean air technologies for the mitigation of a global health and safety challenge.
APA, Harvard, Vancouver, ISO, and other styles
2

Wick, Charles H., and Patrick E. McCubbin. Filtration Characteristics of MS2 Bacteriophage Using Various Molecular Weight Filters. Fort Belvoir, VA: Defense Technical Information Center, August 1999. http://dx.doi.org/10.21236/ada368535.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lawson. L51597 Feasibility Study of New Technology for Intake Air Filtration. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 1989. http://dx.doi.org/10.55274/r0010105.

Full text
Abstract:
Inlet air filters are widely used to remove solids and liquid droplets from the ambient air before it enters the compressor of a gas turbine. Clean inlet air provides many advantages: Less corrosion of the compressor and of gas-path hot parts, such as the turbine, decreased compressor fouling, less erosion of the compressor bladeThese in turn prevent deterioration of output and heat rate, and reduce maintenance costs. Compressor fouling is caused by the ingestion of substances that deposit and adhere to blade surfaces, resulting in reduced aerodynamic efficiency and decreased available output. Air contamination could be significantly reduced by the use of more efficient air filtration systems, especially through the reduction of the quantity of smaller particles ingested. The consequent lower loss of output power and decreased cleaning efforts provide lower costs of operation and increased shaft power. This work was composed of three major efforts: 1) A literature search was performed to establish the state of the art for particle removal from gases, particularly by electrostatic precipitation, and to identify the leading vendors of the equipment-considering both experience and technical expertise. 2) Two chosen companies were visited to determine their technical capabilities as they apply to gas turbine inlet air filtration. 3) A representative gas turbine was specified by PRCI as being the equivalent of a GE Model 3002J turbine, with airflow of 91,200 acfm. A specification based upon that airflow was prepared and submitted to the two vendors. Each vendor prepared a proposal for a filter system compliant with the specification. The proposed air filtration equipment is sufficiently different from existing products that it was judged not beneficial to visit manufacturing facilities. Both vendors are reputable suppliers of air filtration equipment. This study is intended to provide definitive information relative to the use of new technology for air inlet filtration on gas turbines in gas pipeline pumping applications.
APA, Harvard, Vancouver, ISO, and other styles
4

Alvin, M. A. Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993. Office of Scientific and Technical Information (OSTI), April 1993. http://dx.doi.org/10.2172/10182071.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Castillo Saldarriaga, Carlos, and Martha Gómez Álvarez. Selection of filtering agent and filter cloth to separate cells of probiotic yeast using a monophasic filter system. Corporación colombiana de investigación agropecuaria - AGROSAVIA, 2018. http://dx.doi.org/10.21930/agrosavia.poster.2018.4.

Full text
Abstract:
The efficiency of separation operations is a critical point to determinate the yield and economic viability of a production process. Because of this, the selection of adequate operation parameters has become an important part in the design of a new bioprocess. [1, 2]. Due to its low cost and easily transformation to industrial scale, the cross-flow filtration had been highly studied in terms of process performances of microorganism biomass separation without being concerned about their viability. In this work, two parameters of cross-flow filtration were evaluated to separate yeast cells from fermented broth. Meyerozyma guilliermondii was the reference biology system used in the experiments [3]. First, an evaluation of the compatibility of two filtering agents over yeast cells was conducted. After the filtering agent was selected, the efficiency of separation was determined over different filter cloth on a monophasic filter system.
APA, Harvard, Vancouver, ISO, and other styles
6

Xu, Tengfang. Advanced Energy-Efficient Filtration: Fan Filter Unit. Office of Scientific and Technical Information (OSTI), October 2005. http://dx.doi.org/10.2172/891022.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Lee, J. 3D Printed Filter for Particulate Air Filtration. Office of Scientific and Technical Information (OSTI), May 2017. http://dx.doi.org/10.2172/1366926.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Nash, C. A. Filtration of Tank 48H Contents with a Cells Unit Filter. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/799325.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Cheng, Mengdawn, Lee Trowbridge, Glenn A. Fugate, and Jason Richards. Capture of Uranium Particles By Filtration: Effects of Filter Material and Air Humidity. Office of Scientific and Technical Information (OSTI), January 2020. http://dx.doi.org/10.2172/1606911.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Weber, G. F., S. R. Ness, D. L. Laudal, and G. Dunham. Catalytic fabric filtration for simultaneous NO sub x and particulate control. [Catalyst mounted on glass cloth filter material]. Office of Scientific and Technical Information (OSTI), August 1992. http://dx.doi.org/10.2172/7058550.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Filters and filtration' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography