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Статті в журналах з теми "Pleated filter cartridges":
1
Yi, Jiangang, Jiayi Duan, Rui Yuan, Wen Bo, and Xiaolong Ruan. "Modeling and Cleaning Performance Optimization of Conical Filter Cartridge of Gas Turbine Intake Filter." Processes 11, no. 9 (August 29, 2023): 2584. http://dx.doi.org/10.3390/pr11092584.
Анотація:
Intake quality is crucial to gas turbines’ operation. The cartridge filter in the gas turbine intake system filters the gas and outputs a highly clean gas into the gas turbine, while pulse cleaning technology ensures the continuous and efficient operation of cartridge filters. While the current cylindrical pleated filter cartridge used in pulse cleaning usually suffers from insufficient upper cleaning, the conical pleated filter cartridge can effectively solve this issue by providing a greater upper cleaning area with significant application prospects. Despite the existing potential, research on conical filter cartridge cleaning performance is limited; thus, this paper aims to investigate the advantages of pulse cleaning using a conical filter cartridge via numerical simulation. Results demonstrate that while the conical filter cartridge enhances the cleaning strength, cleaning uniformity decreases slightly. To address this shortcoming, this paper innovatively proposes a combination of scattering nozzles and conical filter cartridges to explore the impact of the installation position of scattering nozzles on the cleaning. The modeling and cleaning performance analysis in our research illustrates that the optimal cleaning effect can be achieved under specific conditions when the scattering nozzle is installed parallel to the conical filter cartridge’s inlet. The research work in this paper provides a solution for optimizing the pulse cleaning performance of conical filter cartridges.
2
Chen, Shaowen, and Yun Gong. "Numerical study of the effects of cartridge shape on the reverse pulsed flow cleaning of pleated cartridge filters." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 2 (July 13, 2018): 371–83. http://dx.doi.org/10.1177/0954408918787096.
Анотація:
Patchy cleaning is one of the principal factors resulting in the reduction of the efficiency and quality of reverse pulse-jet cleaning as well as the service lifetime of filtration units. To resolve the above issues, a new pleated cartridge shape was introduced in this study to improve the cleaning efficiency and quality of pleated filter cartridges. To calculate the transient flow and pressure fields for a simple filtration system with one filter cartridge in the reverse pulse-jet cleaning process, an unsteady computational fluid dynamics model was developed via the commercial computational fluid dynamics software of ANSYS CFX. The transient static pressure fields for filter cartridges under four different pleated cartridge shapes were studied. The conventional cylindrical cartridge was selected as the base-model of filter cartridge and contrasted with other three cartridge shapes. It was found that the convergent–divergent cartridge was able to effectively improve the cleaning performance without the increase of tank pressure. Different pleated cartridge shapes are expected to be able to redistribute the pressure drop across the porous media along the filter height and to improve the flow behavior after pulsing gas releasing from the nozzle. For convergent–divergent cartridge shape, the peak pressure on the inner surface of porous media has an obvious increase and the peak pressure arriving time is earlier than other cases. It shows that the reverse flow has much more competence to remove the dust powder or cake from the porous media. At the same time, the area-averaged pressure drop at the bottom section of the filter has an increase of 50% under the cartridge with a convergent–divergent shape compared to that with a cylindrical shape. It is considered to enhance the cleaning mechanical stress at the bottom section of the filter cartridge. The better cleaning performance was observed in the medium, with 150% increase compared to that with a cylindrical shape. Furthermore, the cleaning performance gets improved because the value enhances on the top section. The redistribution of pressure drop observed is mainly because the special geometric construction of pleated cartridges compresses the flow on the medium and produce higher pressure drop there. Further studies indicate that the improved cleaning performance was observable under the consideration of the tank pressure reduction and variation of media permeability during each cleaning phase, and the change of pleated cartridge shapes can also improve the cleaning performance when combined with other improvement methods.
3
Qiu, Jun, Daishe Wu, Da-Ren Chen, and Jianlong Li. "Reverse pulsed-flow cleaning of pleated filter cartridges having an inner pleated filter cone." Process Safety and Environmental Protection 146 (February 2021): 481–89. http://dx.doi.org/10.1016/j.psep.2020.11.025.
4
Peinador, René I., Mohamed Kaabouch, Roger Ben Aim, and José I. Calvo. "Non-Destructive Characterization of Industrial Membrane Cartridges by Using Liquid–Liquid Displacement Porosimetry (LLDP)." Membranes 10, no. 12 (November 25, 2020): 369. http://dx.doi.org/10.3390/membranes10120369.
Анотація:
This works aims to propose and demonstrate the accuracy of a novel method of characterization aimed for non-destructive analysis of microfiltration (MF) membrane cartridges. The method adapts conventional liquid–liquid displacement porosimetry (LLDP) for performing an in-line porosimetric analysis of the membrane cartridges, getting their pore size distributions (PSDs) and mean pore diameters (davg). Six commercial filtration cartridges featuring polyethersulfone (PES) pleated membranes were analyzed using a newly designed filtration rig, based on the liquid–liquid displacement porometer, developed at the Institut de la Filtration et des Techniques Séparatives (IFTS) and operated at constant flow. The experimental rig allows the direct and non-destructive characterization of the cartridge in its original presentation. Results have been compared with those obtained by using gas–liquid displacement porosimetry (GLDP) on small membrane coupons detached from such cartridges. The comparison allows us to conclude that the proposed method gives enough accuracy in the determination of porosimetric characteristics of the filters. This method can be used as a precise characterization technique for a non-destructive in-line study of filter performance and can be envisaged as useful to periodic quality or fouling control of the commercial cartridges.
5
Dziubak, Tadeusz. "Experimental Studies of PowerCore Filters and Pleated Filter Baffles." Materials 15, no. 20 (October 18, 2022): 7292. http://dx.doi.org/10.3390/ma15207292.
Анотація:
The material most commonly used to filter and clean the intake air of vehicle internal combustion engines is pleated filter paper, which in most cases is shaped in the form of a cylinder or panel. The production technology has a low cost and is not complicated. In addition to high separation efficiency and filtration performance, pleated filter media are required to have low initial pressure drop, which depends on the geometry of the bed. Much research has been conducted in this area. Dust accumulated in the filter bed causes an increase in pressure drop, which is the cause of deformation and sticking of pleats. The lack of stability of the pleats, the need to strengthen them, and the need to obtain small sizes while achieving high efficiency and accuracy of filtration of engine intake air was the reason for the development of a different design and a new technology for making filter cartridges called PowerCore. The distinctive feature of these filters is axial flow in one direction of the air stream, which avoids turbulence and thus minimizes pressure drop. This paper presents a comparative analysis of a standard PowerCore and PowerCore G2 filter bed and two cylindrical filters with a pleated filter bed made of cellulose and polyester. The conditions and methodology of experimental testing of filters with test dust are presented. During the tests, the characteristics of separation efficiency and filtration performance, as well as pressure drop as a function of the mass of dust retained on the filter of two PowerCore filters and two cylindrical filters were performed. Three specimens of test filters with the same filtration area were made from each sample of filter bed. The results showed that in each test of the filter bed, there is an initial filtration period characterized by low (96–98%) initial separation efficiency and the presence of large (dpmax) dust grains. As the dust loading of the bed increases, the separation efficiency and filtration performance obtain higher and higher values. The initial period of filtration ends when the conventional value (99.9%) of separation efficiency is reached. The duration of this period depends on the type of filter bed and for the PowerCore G2 filter ends for a dust loading of km = 33.1 g/m2, and for the cellulose filter for km = 117.3 g/m2. During the initial period, the air behind the PowerCore G2 filter contains grains with sizes in the range of dpmax = 9–16 µm. Behind the cellulose filter, dust grains are much larger, dpmax = 17–35 µm. The total operating time of the PowerCore G2 filter, limited by the achievement of the permittivity resistance Δpwdop = 3 kPa, is twice that of the other filter compositions tested.
6
Chen, Shaowen, and Da-Ren Chen. "Annular-slit nozzles for reverse flow cleaning of pleated filter cartridges." Separation and Purification Technology 177 (April 2017): 182–91. http://dx.doi.org/10.1016/j.seppur.2016.10.050.
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Li, Jianlong, Peng Wang, Daishe Wu, and Da-Ren Chen. "Numerical study of opposing pulsed-jet cleaning for pleated filter cartridges." Separation and Purification Technology 234 (March 2020): 116086. http://dx.doi.org/10.1016/j.seppur.2019.116086.
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Cuiping, Yan, Liu Guijian, and Chen Haiyan. "VARIETY BEHAVIORS OF DEPTH AND SURFACE FILTER MEDIA WITH THE AGES FOR PLEATED FILTER CARTRIDGES." Environmental Engineering and Management Journal 17, no. 11 (2018): 2577–86. http://dx.doi.org/10.30638/eemj.2018.256.
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Li, Jianlong, Wenjun Xie, Quanquan Wu, Da-Ren Chen, Dinglian Shi, Qiang Chen, Zhifei Ma, and Daishe Wu. "Improved Pulsed-Jet Cleaning of Pleated Cone Filter Cartridges Using a Diffusion Nozzle." Aerosol and Air Quality Research 23 (2023): 220324. http://dx.doi.org/10.4209/aaqr.220324.
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Cuiping, Yan, Zhang Mingxing, Lin Longyuan, and Chen Haiyan. "An analysis of a reverse pulse cleaning process using high-flow pleated fabric filter cartridges." Process Safety and Environmental Protection 113 (January 2018): 264–74. http://dx.doi.org/10.1016/j.psep.2017.10.018.
Дисертації з теми "Pleated filter cartridges":
1
Ruziwa, Walter Rutendo. "Hydrodynamic modelling of pleated cartridge filters." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/35607.
Анотація:
The primary aim of this study is to develop and validate a hydrodynamic model for the design of pleated cartridge filters. This software package is intended to develop into a cost effective, robust and reliable design tool to enable engineers to appraise the operation of a filter. Mathematical theories are still being developed in order to build sound software for coupled flows in geometrically complicated domains. This is mainly due to the little understanding of the mathematical theories in addressing interfacial constraints in coupled flows. A 2-D computer code has been developed to simulate both Newtonian and non-Newtonian flows in the filter. The model is based on a flow model described by the Stokes, Continuity and Darcy equations. These equations are solved by the weighted residuals finite element method. Two U-V-P schemes based on the Lagrange and Taylor-Hood elements are developed and tested on various coupled flow physical problems with the latter scheme proving to be capable of coping with complex geometries. The limitations of the Lagrange scheme are described.
2
Khirouni, Nassim. "Étude de la régénération par jet-pulsé des cartouches filtrantes colmatées par des particules ultrafines métalliques." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0194.
Анотація:
Les procédés métallurgiques comme la projection thermique, la découpe des métaux et la sidérurgie génèrent des concentrations élevées en particules ultrafines métalliques de l’ordre de 108 particules.cm-3 avec des particules de diamètre inférieur à 100 nm. Ces particules représentent une menace pour la santé des travailleurs dans les milieux professionnels et ne peuvent pas être rejetées dans l’environnement à cause de leur toxicité. La filtration des particules ultrafines métalliques est actuellement problématique. Des observations du terrain ont révélé un colmatage rapide et irréversible des filtres. Ceci implique que les filtres doivent être remplacés régulièrement, ce qui engendre un coût supplémentaire pour les industriels. Afin d’apporter une solution à la problématique posée, cette thèse s’intéresse à évaluer l’efficacité de décolmatage par jet pulsé et améliorer la régénération des filtres en utilisant la technique de précoating, qui consiste à protéger la surface des filtres par une couche de particules microniques facilement décolmatable. Les expériences ont été réalisées sur un pilote de projection thermique à arc électrique, qui permet de reproduire les conditions réelles rencontrées en industrie, sur filtres plans et cartouches plissées. L’influence de différents paramètres sur l’efficacité de décolmatage par jet pulsé a été étudiée : masse déposée, pression de l’air de décolmatage, vieillissement du gâteau de filtration, traitement surfacique du filtre, application du précoating, plissage des cartouches et le mode de décolmatage. Les résultats ont montré la forte adhésion du gâteau de filtration composé de nanoparticules métalliques à la surface du filtre, l’efficacité de décolmatage ne dépasse pas 30 %. L’application du précoating a permis d’améliorer l’efficacité de décolmatage pour atteindre 90 % et de stabiliser le processus de filtration. L’applicabilité de cette technique sur cartouches plissées a été validéeMetallurgical processes such as thermal spraying, metal cutting and arc welding emit high concentrations of ultrafine metallic particles, number concentrations that can reach 108 particles.cm-3 with diameters less than 100 nm. The efficient removal of these particles is of importance to ensure air quality in work places and to prevent their release into the environment due to their toxicity. Filtration of ultrafine metallic particles is currently problematic. Negative feedbacks have been made about the inefficient cleaning and the rapid clogging of filters. Failing to clean the filters surface implies that a recurrent replacement is required, which can be very expensive. This study is focused on evaluating the pulse jet cleaning efficiency and improving the regeneration of filters by the use of the precoating technique, which consists of protecting the filter surface with a layer of micron-sized particles that is easily discharged. Experiences are conducted using a pilot thermal metal spraying process by electric arc that allows reproducing the real conditions encountered at an industrial scale, on flat and pleated filters. The influence of different parameters on the cleaning efficiency is studied: deposited mass, air cleaning pressure, aging of the filter cake, filter surface treatment, precoating application, the pleat number and the cleaning mode. Results revealed the strong adhesion of the nanostructured filter cake to filter surface, the cleaning efficiency does not surpass 30 %. The application of precoating allowed to significantly improve the cleaning efficiency to reach 90 % and to stabilize the filtration process. The use of this technic was validated using pleated filter cartridges
3
Brown, A. I. "An ultra scale-down approach to the rapid evaluation of pleated membrane cartridge filter performance." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1123181/.
Анотація:
Pleated membrane cartridge filters are used extensively throughout a typical bioprocess. They are exposed to a range of operating conditions and feedstocks. Discrepancies between the performance of the flat sheet membrane and pleated membrane have previously been identified, although little has been done to fully characterise the effects of pleating. As current scale-up techniques use the flat sheet membrane to predict the performance of the large-scale pleated cartridge, the discrepancy in performance between flat sheet and pleated cartridge leads to inaccuracy in scale-up. This inaccuracy is accounted for by over-sizing of the equipment. In turn this reduces the efficiency of the bioprocess and increases capital costs. At the present time no accurate and reliable scale-up methodology exists that accounts for the effects of pleating. A systematic investigation into the effect of pleating has been conducted. By varying the key pleat characteristics: pleat height, type and packing density, the impact upon cartridge performance of these characteristics has been determined. Using this knowledge, new scale-down cartridge filters have been developed, fabricated and tested. When faced with both clean water and a pepsin protein solution, performance was within 10% of the large-scale 10” counterpart, whilst operating with a 1000 fold reduction in feed volume. This compares well to flat sheet membrane which showed up to 53% variation in performance to the pleated cartridge filter. The scale-down cartridge is limited to the degree in which reduction of feedstock can be achieved. So as to reduce feed volume requirements further, a ultra scaledown methodology has been developed that uses experimental models to account for the effect that pleating has upon cartridge performance. When coupled with experimental data derived from flat sheet discs, the scale-up performance improves predictions with flat sheet membrane however discrepancies still exist between the two scales, suggesting that the method is not yet robust. Based upon the work of this thesis the close performance between the scaledown cartridges and the large-scale cartridges, coupled with the low feed requirement, make the device an excellent method by which rapid scale-up can be achieved during the process development of biopharmaceutical products. However, it is recommended that the ultra scale-down approach is developed further, so as to build a robust method to predict the performance of industrial scale pleated filter cartridges using significantly reduced areas of flat sheet membrane.
4
Waghode, Atul Ninu. "Computational fluid dynamics of coupled free/porous regimes : a specialised case of pleated cartridge filter." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/35467.
Анотація:
The multidisciplinary project AEROFIL has been defined and coordinated with the idea of developing novel filter designs to be employed in aeronautic hydraulic systems. The cartridge filters would be constructed using eco-friendly filtration media supported by unconventional disposable or reusable solid components. My main contribution to this project is the development of a robust and cost-effective design and analysis tool for simulating the hydrodynamics in these pleated cartridge filters. The coupled free and porous flow regimes are generally observed in filtration processes. These processes have been the subject of intense investigation for researchers over the decades who are striving hard to resolve some of the critical issues related to the free/porous interfacial constraints and their mathematical representations concerning its industrial applications.
Частини книг з теми "Pleated filter cartridges":
1
Nassehi, V., A. N. Waghode, N. S. Hanspal, and R. J. Wakeman. "Mathematical Modelling of Flow through Pleated Cartridge Filters." In Progress in Industrial Mathematics at ECMI 2004, 298–302. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-28073-1_47.
Тези доповідей конференцій з теми "Pleated filter cartridges":
1
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.
Анотація:
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.
2
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.
Анотація:
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.