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Articoli di riviste sul tema "Fluidized-bed combustion"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Erdiwansyah, Mahidin, Husni Husin, et al. "Combustion Efficiency in a Fluidized-Bed Combustor with a Modified Perforated Plate for Air Distribution." Processes 9, no. 9 (2021): 1489. http://dx.doi.org/10.3390/pr9091489.

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Combustion efficiency is one of the most important parameters especially in the fluidized-bed combustor. Investigations into the efficiency of combustion in fluidized-bed combustor fuels using solid biomass waste fuels in recent years are increasingly in demand by researchers around the world. Specifically, this study aims to calculate the combustion efficiency in the fluidized-bed combustor. Combustion efficiency is calculated based on combustion results from the modification of hollow plates in the fluidized-bed combustor. The modified hollow plate aims to control combustion so that the fuel

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2

Grubor, Borislav, Dragoljub Dakic, Stevan Nemoda, Milica Mladenovic, Milijana Paprika, and Simeon Oka. "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation." Thermal Science 23, Suppl. 5 (2019): 1655–67. http://dx.doi.org/10.2298/tsci180725290g.

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Paper gives a review of the most important results of extensive and wide-ranging research program on R&D of fluidized bed combustion technology in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. Paper presents detailed overview of R&D activities from the beginning in the second half of the 1970's up to present days. These activities encompass applied research achievements in the field of characterization of limestones and bed agglomeration and sintering and modeling of overall processes during fluidized bed combustion, all of which have fac

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3

Leckner, Bo. "Fluidized Bed Combustion." Energy 30, no. 1 (2005): 97–99. http://dx.doi.org/10.1016/j.energy.2004.02.024.

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4

Mladenovic, Milica, Dragoljub Dakic, Stevan Nemoda, et al. "Combustion of low grade fractions of Lubnica coal in fluidized bed." Thermal Science 16, no. 1 (2012): 297–311. http://dx.doi.org/10.2298/tsci1201297m.

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In this paper a method of examination of fuel suitability for fluidized bed combustion is presented. The research of combustion characteristics of low grade fractions of Lubnica brown coal in the fluidized bed by the aforementioned methodology has been carried out on a laboratory semi-industrial apparatus of 200 kWt. Description of the experimental fluidized bed combustion facility is given, as well as experimental results, with the focus on furnace temperature distribution, in order to determine the location of the zone of intensive combustion. Based on investigation results, which are focuse

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5

Hainley, D. C., M. Z. Haji-Sulaiman, S. Yavuzkurt, and A. W. Scaroni. "Operating Experience With a Fluidized Bed Test Combustor." Journal of Energy Resources Technology 109, no. 2 (1987): 58–65. http://dx.doi.org/10.1115/1.3231325.

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This paper presents operating experience with a fluidized bed combustor burning various coals. The primary focus is on the effect of relevant coal properties on combustor performance. Tests were carried out using anthracite, HVB and HVC bituminous and sub-bituminous A coals, and petroleum coke. Comparisons of the performance of the combustion on the various fuels are made. A two-stage fluidized bed combustor operating in a single-stage mode without recycle was employed. Experimental measurements included temperature, fuel feed rate, fluidization velocity and bed height. For some of the coals,

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6

HOSODA, Hideo. "Fluidized bed peat combustion." Journal of the Fuel Society of Japan 65, no. 9 (1986): 778–82. http://dx.doi.org/10.3775/jie.65.9_778.

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7

Ismagilov, Z. R., and M. A. Kerzhentsev. "Fluidized bed catalytic combustion." Catalysis Today 47, no. 1-4 (1999): 339–46. http://dx.doi.org/10.1016/s0920-5861(98)00315-0.

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8

Tavoulareas, E. Stratos. "Fluidized-Bed Combustion Technology." Annual Review of Energy and the Environment 16, no. 1 (1991): 25–57. http://dx.doi.org/10.1146/annurev.eg.16.110191.000325.

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9

Liang, Yu Wen, Hui Song, and Yuan Xin Li. "Optimization Design of Limestone Conveyor System in Circulating Fluidized Bed Boiler." Applied Mechanics and Materials 602-605 (August 2014): 731–33. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.731.

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The qualities of the limestone conveyor system running directly affect the efficiency of circulating fluidized bed boiler combustion. Aiming at the problems of limestone conveyor system, this paper optimizes the design of the control system and the ring limestone fluidized bed boiler combustion control system networking, the use of configuration technology for real-time data control system to monitor and implement manual and automatic switching function. While improving the delivery system and improve the combustion efficiency of the boiler. For the circulating fluidized bed boiler combustion

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10

Arsenijevic, Zorana, Zeljko Grbavcic, Bosko Grbic, et al. "Fluidized bed combustion of pesticide-manufacture liquid wastes." Journal of the Serbian Chemical Society 75, no. 4 (2010): 523–35. http://dx.doi.org/10.2298/jsc090820024a.

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Industrial liquid wastes can be in the form of solutions, suspensions, sludges, scums or waste oil and have organic properties. The objective of this work was to demonstrate the technical feasibility of a fluidized bed as a clean technology for burning liquid waste from a pesticide production plant. The combustion of liquid waste mixtures, obtained from realistic samples, was investigated in a pilot scale fluidized bed with quartz sand particles of 0.63-1.25 mm in diameter and 2610 kg/m3 in density at 800-950?C. To ensure complete combustion of liquid waste and additional fuel, the combustion

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11

Markolenko, Tetiana D., Dmitro G. Prodanov, and Yaroslav I. Beglov. "Boiler thermal load control during the combustion of solid household waste." ELECTRICAL AND COMPUTER SYSTEMS, no. 42(118) (2025): 43–51. https://doi.org/10.15276/eltecs.42.118.2025.5.

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Abstract. In modern conditions of increasing volumes of solid household waste (SHW) and the need for its environmentally safe disposal, particular attention is paid to fluidized bed combustion technologies. This approach significantly reduces waste volume, generates additional thermal energy, and minimizes the negative impact on the environment. However, effective SHW combustion in a fluidized bed requires precise control of combustion parameters, as fuel composition variations and temperature fluctuations can lead to decreased process efficiency, the formation of harmful emissions, and emerge

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12

Butt, Jawad Abdullah, Yasmin Nergis, Ahmad Hussain, Mughal Sharif, and Arjan Das. "Emissions Reduction by Combustion Modeling in the Riser of Fluidized Bed Combustor for Thar Coal Pakistan." Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences 59, no. 4 (2022): 61–70. http://dx.doi.org/10.53560/ppasb(59-4)754.

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Pakistan has experienced a protracted electricity shortage for the past few years. However, despite Pakistan’s abundant coal deposits, modern coal combustion technology is still required to reduce emissions. Pakistan is struggling to utilize its energy resources and currently experiencing an electrical shortage of more than 8000 MW. The research study models the combustion performance in a fluidized bed riser using ANSYS FLUENT software to understand the combustion behavior of low-rank Thar coal. A simple circulating fluidized bed (CFB) combustion riser was modeled for computational fluid dyna

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13

Cui, Lin Lin, Hua Lai, Xiao Qian Yu, and Ming Jie Qi. "Modeling and Simulation of Circulating Fluidized Bed Boiler Combustion System Based on Neural Network." Advanced Materials Research 706-708 (June 2013): 859–63. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.859.

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According to the multivariable coupling、 large time delay, non-linearity and time-varying and other difficulties of circulating fluidized bed boiler combustion system, a kind of control technology based on neural network to circulating fluidized bed boiler combustion system was presented. Actual parameter data of a paper mill in Kunming and neural network control principle were used in the establishment of a circulating fluidized bed boiler combustion system mathematical model and modified BP neural network algorithm training. Results of MATLAB simulation show that boiler combustion system con

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14

Ťažký, Martin, Lenka Bodnárová, and Rudolf Hela. "Physico-Mechanical Properties of Lightweight Concrete with Fluidized Bed Combustion Fly Ash Based Light Weight Aggregate." Materials Science Forum 908 (October 2017): 106–10. http://dx.doi.org/10.4028/www.scientific.net/msf.908.106.

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Increasingly we see today among the conventional high temperature fly ash also with the production of fly ash from fluidized bed combustion. These fluidized bed combustions fly ashes, however, have little used this area, mainly for their chemical composition and morphology. Current efforts are directed towards the development of new technological processes and building materials that would allow the use of this industrial waste and its qualities. One possible way of fluidized bed combustion fly ash’s utilizing in construction industries the production of cold balled lightweight aggregate. Prod

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15

Ťažký, Martin, and Rudolf Hela. "Synergistic Effect of High Temperature Fly Ash with Fluidized Bed Combustion Fly Ash in Cement Composites." Key Engineering Materials 722 (December 2016): 113–18. http://dx.doi.org/10.4028/www.scientific.net/kem.722.113.

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Using high temperature fly ash for his pozzolan properties to cement composite production is known a few years ago. New ways combustion of fossil fuels also creates a new type of fly ash, named fluidized bed combustion fly ash. However, this fly ash has same pozzolan properties as has high temperature fly ash, this type is not using for production of cement composites. Fluidized bed combustion fly ash has highly variable chemical composition but usually it has a higher amount of free CaO together with sulphates. This higher amounts of free CaO after mixing of fluidized bed combustion fly ash w

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16

Popoola, Olubunmi Tolulope, and Abraham A. Asere. "Emission and Combustion Characteristics of Lafia-Obi Coal in Fluidized Bed Combustor." Advanced Materials Research 824 (September 2013): 318–26. http://dx.doi.org/10.4028/www.scientific.net/amr.824.318.

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The technology of fluidized bed coal combustion (FBC) and its advantages over conventional coal burning systems is now well established and is extensively reported in the literature. There is also some emphasis in literature about the suitability of Lafia-Obi coal in FBC. However, there is little quantitative or qualitative information on theperformance of Lafia-Obi in FBC. This paper reports a study of the combustion of monosized coal fractions fed continuously to the bed via an overbed feeder. Using appropriate ASTM standards, proximate and ultimate analyses of samples of Lafia-Obi coal were

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17

Han, J., T. Shimizu, M. Wataru, H. Kim, and G. Wang. "Polypropylene Combustion in a Fluidized Bed Combustor." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 32, no. 12 (2010): 1121–29. http://dx.doi.org/10.1080/15567030802612499.

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18

Annamalai, K., M. Y. Ibrahim, and J. M. Sweeten. "Experimental Studies on Combustion of Cattle Manure in a Fluidized Bed Combustor." Journal of Energy Resources Technology 109, no. 2 (1987): 49–57. http://dx.doi.org/10.1115/1.3231324.

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Manure from cattle feedlots is a renewable energy source which has the potential of supplementing the existing fossil fuels. But the heat content of manure is rather low. Since, the fluidized bed combustion technology has been used for the energy conversion of marginal fuels, such a technology is being explored for the combustion of feedlot manure. A fluidized bed combustor of 0.15 m (6 in.) diameter was used for the combustion tests on manure. Experiments were conducted with −20 to +20 percent excess air and at bed temperatures ranging from 600°C (1112°F) to 800°C (1472°F). Experimental data

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19

Antonio, Soria-Verdugo, Kauppinen Juho, Soini Teemu, Miguel García-Gutiérrez Luis, and Pikkarainen Toni. "Pollutant emissions released during sewage sludge combustion in a bubbling fluidized bed reactor." Waste Management 105 (February 1, 2020): 27–38. https://doi.org/10.5281/zenodo.5665211.

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The combustion of dry sewage sludge particles in a bubbling fluidized bed was studied in detail, analyzing the composition of the exhaust gases by means of a FTIR equipment. The operating conditions of the fluidized bed, i.e., the bed temperature and mass flow rate of fluidizing air, were varied to quantify their effect on the exhaust gas composition. The bed material was also varied, using sepiolite, silica sand and braunite particles, to evaluate the effect of different bed densities on the pollutant emissions. The results obtained for the combustion of sewage sludge particles in the differe

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20

Osuská, Lucia, Rudolf Hela, and Martin Ťažký. "Influence of Use Fluidized Fly Ash Combined with High Temperature Fly Ash on Microstructure of Cement Composite." Key Engineering Materials 722 (December 2016): 146–50. http://dx.doi.org/10.4028/www.scientific.net/kem.722.146.

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The constraint of using fluidized bed combustion fly ash as addition for concrete is mainly its chemical composition. Increased contents of sulphates and free lime in fluidized bed combustion fly ash causes development of undesirable ettringite during hydration. Expansive character of this mineral can have degrading effect on hardened concrete. Fluidized bed combustion fly ash as well as high temperature fly ash are considered pozzolanic addition, which is capable of reacting with Ca(OH)2 and form similar hydration products as cement hydration. Use of small amount of fluidized bed combustion f

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21

Nemoda, Stevan, Milica Mladenovic, Milijana Paprika, Aleksandar Eric, and Borislav Grubor. "Three phase Eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed." Thermal Science 20, suppl. 1 (2016): 133–49. http://dx.doi.org/10.2298/tsci151025196n.

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The paper presents a two-dimensional CFD model of liquid fuel combustion in bubbling fluidized bed. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The model is taking into account also the third - liquid phase, as well as its interaction with the solid and gas phase. The proposed numerical model comprise energy equations for all three phases, as well as the transport equations of chemical components with source terms originated from the component conversion. In the frame

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22

Cai, N., T. Yu, J. Xiao, and G. Welford. "Thermal performance study for the coal-fired combined cycle with partial gasification and fluidized bed combustion." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 215, no. 4 (2001): 421–27. http://dx.doi.org/10.1243/0957650011538686.

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The coal-fired combined cycle with partial gasification and fluidized bed combustion (PGFBC-CC), also referred to as a hybrid cycle, has advantages of staged energy conversion and utilization, which can attain high thermal efficiency with low emissions. Four kinds of PGFBC-CC are studied in this paper, two based on pressurized fluidized bed combustion (PFBC) and two on atmospheric fluidized bed combustion (AFBC). Thermal performance calculations and parametric analyses were performed. On the basis of the results from the above analyses, the best integration system for China is suggested. In ad

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23

Johari, Anwar, Ramli Mat, Mohd Johari Kamaruddin, Tuan Amran Tuan Abdullah, Wan Rosli Wan Sulaiman, and Asmadi Ali. "Combustion of Municipal Solid Waste in a Pilot Scale Fluidized Bed Combustor." Advanced Materials Research 931-932 (May 2014): 1015–19. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.1015.

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Combustion study of municipal solid waste combustion in a pilot scale fluidized bed combustor had been carried out. The work was aimed at demonstrating sustainable combustion of municipal solid waste by employing operating parameters gained from previous studies. The primary and secondary air factor used were AF = 0.8 and AF = 0.6 respectively. The fluidization number was 5Umf and both in-bed and freeboard region temperature distributions were monitored continuously. Results on the combustion studies revealed that the initial bed temperature could be sustained due to high thermal capacity of s

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24

Paulauskas, Rolandas, Marius Praspaliauskas, Ignas Ambrazevičius, et al. "Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed." Energies 17, no. 9 (2024): 2196. http://dx.doi.org/10.3390/en17092196.

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This study investigates the combustion of agricultural biomass rich in alkali elements in the fluidized bed. The experiments were performed with smashed corn cob in a 500 kW fluidized bed combustor which was designed for work under low bed temperatures (650–700 °C). During the experiments, the formed compounds from corn cob combustion were measured by sampling particulate matter, and mineral compositions were determined. Also, the temperature profile of the FBC was established. It was determined that the emissions of K and Na elements from the FBC increased from 4 to 7.3% and from 1.69 to 3%,

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25

Gulyurtlu, I., T. Crujeira, M. H. Lopes, et al. "The Study of Combustion of Municipal Waste in a Fluidized Bed Combustor." Journal of Energy Resources Technology 128, no. 2 (2006): 123–28. http://dx.doi.org/10.1115/1.2191507.

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The combustion behavior of municipal solid waste was studied in a pilot fluidized bed combustor. The waste was pelletized prior to its use. Both co-firing with coal and combustion of waste alone were under taken. The combustion studies were carried out on the pilot installation of INETI. The fluidized bed combustor is square in cross section with each side being 300mm long. Its height is 5000mm. There is a second air supply to the freeboard at different heights to deal with high volatile fuels. There was a continuous monitoring of the temperatures in the bed, as well as the composition of the

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26

Ren, Lijun. "Combustion efficiency control method of circulating fluidized bed boiler based on adaptive genetic algorithm." Journal of Physics: Conference Series 2717, no. 1 (2024): 012040. http://dx.doi.org/10.1088/1742-6596/2717/1/012040.

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Abstract In order to improve the traditional boiler combustion efficiency control method, which has the problem of low efficiency after control, a new combustion efficiency control method of circulating fluidized bed boiler based on adaptive genetic algorithm is proposed in this paper. Firstly, the iterative principle of adaptive genetic algorithm is analyzed; Secondly, the combustion process model of circulating fluidized bed boiler is constructed by BP neural network method; Finally, based on the above model, the optimal control objective function of adaptive genetic algorithm is constructed

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27

TAKEUCHI, Masao, Junko KONNO, and Yoshizo SUZUKI. "Combustion Characteristics of Fluidized Bed Catalytic Combustion." Transactions of the Japan Society of Mechanical Engineers Series B 63, no. 605 (1997): 323–28. http://dx.doi.org/10.1299/kikaib.63.605_323.

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28

Saxena, S. C., W. Y. Wu, and M. B. Fei. "Fluidized-bed combustion of coal." Energy 22, no. 11 (1997): 1029–40. http://dx.doi.org/10.1016/s0360-5442(97)00046-7.

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29

Badin, Elmer J., and George C. Frazier. "Sorbents for fluidized-bed combustion." Environmental Science & Technology 19, no. 10 (1985): 894–901. http://dx.doi.org/10.1021/es00140a003.

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Datta, Ahi Bhushan, Shib Shankar Nandi, and Debdas Bhaduri. "Fluidized bed combustion of coal." Fuel 64, no. 4 (1985): 564–67. http://dx.doi.org/10.1016/0016-2361(85)90094-8.

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Priem, Richard J. "Pressurized fluidized bed combustion technology." Combustion and Flame 62, no. 1 (1985): 101. http://dx.doi.org/10.1016/0010-2180(85)90098-7.

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Mladenovic, Milica, Stevan Nemoda, Milijana Paprika, and Ana Marinkovic. "Application of analytical and CFD models of liquid fuels combustion in a fluidized bed." Thermal Science 23, Suppl. 5 (2019): 1627–36. http://dx.doi.org/10.2298/tsci180226317m.

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In Laboratory for Thermal Engineering and Energy of Institute Vinca, University of Belgrade, a 2-D CFD modeling procedure of numerical simulation of unconventional liquid fuel combustion in bubbling fluidized bed has been developed. This procedure is based on a two-fluid Euler-Euler approach modeling a fluidized bed with the determination of the velocities field of gas and particulates in two-phase, granular flows, analog to the kinetic theory of gases. This model describes in detail the unsteady motion of gas and solid phases, the formation and movement of bubbles with the combustion process

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Anderson, J. S., E. L. Carls, P. J. Mainhardt, et al. "Wastage of In-Bed Heat Transfer Surfaces in the Pressurized Fluidized Bed Combustor at Grimethorpe." Journal of Engineering for Gas Turbines and Power 109, no. 3 (1987): 298–304. http://dx.doi.org/10.1115/1.3240039.

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The wastage of in-bed heat transfer surfaces has recently emerged as a potentially serious problem for both pressurized and atmospheric fluidized bed combustors. The experimental pressurized fluidized bed combustion facility at Grimethorpe has accumulated a considerable quantity of data covering the wastage of in-bed tubes obtained during a total of just over 3600 h of operation. The combustor operated with different tube banks, with some degree of wastage being experienced with each one. The data are described, evidence for possible solutions is presented, and plans for future tests at Grimet

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Moreno, Joseba, Matthias Hornberger, Max Schmid, and Günter Scheffknecht. "Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kWth Calcium Looping CFB Calciner." Energies 14, no. 8 (2021): 2162. http://dx.doi.org/10.3390/en14082162.

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The fluidized bed combustion (FBC) of biomass and solid recovered fuel (SRF) is globally emerging as a viable solution to achieve net-negative carbon emissions in the heat and power sector. Contrary to conventional fossil fuels, alternative fuels are highly heterogeneous, and usually contain increased amounts of alkaline metals and chlorine. Hence, experimental studies are mandatory in order to thoroughly characterize the combustion behavior and pollutant formation of non-conventional fuels in novel applications. This work gives an overview of experimental investigations on the oxy-fuel combus

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Yan, Yi. "Analysis and Discussion on Burning Low Calorific Value Fuel of Circulating Fluidized Bed Boiler." E3S Web of Conferences 329 (2021): 01074. http://dx.doi.org/10.1051/e3sconf/202132901074.

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China's coal-dominated energy structure will not change in a short time. In order to implement the relevant national policies on energy conservation and emission reduction, it is a good response to adopt circulating fluidized bed boilers in coal-fired power stations. Circulating fluidized bed boiler adopts fluidized combustion, which has high reliability and high utilization rate because of its special combustion mode and particle recycling device. For the low calorific value inferior fuel which is difficult to burn in common boiler, CFB boiler also has certain adaptability and compatibility.

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Yang, Yu Ping, and Yun Feng Xu. "The Application of SunyPCC800 in CFB Boilers." Advanced Materials Research 535-537 (June 2012): 779–82. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.779.

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The combustion technology of Circulating Fluidized Bed Boilers is a Cleaning and high efficent of Coal Powder Combustion technology. Traditional control methods can hardly get ideal control effect. To Realize datas reading and writing by self_control software throgh DCS, when coal quality, loading altered, realized automatic closed-loop control of combustion process of circulating fluidized bed, to implement primary air flow, secondary air flow and air-induced automatic cordinated control and reached cleaning of coal quality and combustion high efficiency.

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Minchener, A. J. "Fluidized bed combustion systems for power generation and other industrial applications." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 217, no. 1 (2003): 9–18. http://dx.doi.org/10.1243/095765003321148646.

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Fluidized bed combustion (FBC) in various forms has been used to burn all types of coal, coal waste and a wide variety of other fuels, either singly or cofired with coal. FBC boilers are currently available commercially in the capacity range from 1 MWth to over 250 MWe and continue to be adopted for a variety of commercial, industrial and power generation applications. There are two main derivatives of FBC, namely bubbling fluidized bed combustion (BFBC) and circulating fluidized bed combustion (CFBC). There are also several hybrid systems and pressurized versions of both BFBC and CFBC. The st

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Sharma, Vishal, and Rajeev Kamal Sharma. "Fluidized Bed Combustion: Technology for Efficient Utilization of Biomass Residues." Asian Journal of Engineering and Applied Technology 7, no. 2 (2018): 73–79. http://dx.doi.org/10.51983/ajeat-2018.7.2.951.

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Fossil fuels are the most common and reliable energy source, which presently fulfill 80% energy requirements all across the world. In the last few decades, over-consumption, fast pace modernization and population growth are some prominent factors which are exploiting the fossil fuels. The degradation of natural resources has gone up at an alarming rate which provoked to look for an alternate source of energy. From all available alternative renewable energy sources, biomass is the only carbon-based sustainable option. But, its diversity makes it a complex and difficult fuel. Among all technolog

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Hrdlicka, Jan, Pavel Skopec, Jan Opatril, and Tomas Dlouhy. "Oxyfuel Combustion in a Bubbling Fluidized Bed Combustor." Energy Procedia 86 (January 2016): 116–23. http://dx.doi.org/10.1016/j.egypro.2016.01.012.

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Kakaras, Emmanuel, Panagiotis Grammelis, George Skodras, and Panagiotis Vourliotis. "Fluidized bed combustion with the use of Greek solid fuels." Thermal Science 7, no. 2 (2003): 33–42. http://dx.doi.org/10.2298/tsci0302033k.

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The paper is an overview of the results obtained up to date from the combustion and co-combustion activities with Greek brown coal in different installations, both in semi-industrial and laboratory scale. Combustion tests with Greek lignite were realized in three different Circulating Fluidized Bed Combustion (CFBC) facilities. Low rank lignite was burned in a pilot scale facility of approx. 100kW thermal capacity, located in Athens (NTUA) and a semi-industrial scale of 1.2 MW thermal capacity, located at RWE's power station Niederaussem in Germany. Co-combustion tests with Greek xylitic ligni

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41

Wang, Haitian, Liye Wang, Silin Zeng, et al. "The impact of ash layer diffusion on the combustion of coal gangue particles of different sizes under low-oxygen conditions in the dense phase zone of a circulating fluidized bed: an experimental study." Journal of Physics: Conference Series 3000, no. 1 (2025): 012019. https://doi.org/10.1088/1742-6596/3000/1/012019.

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Abstract The 660 MW circulating fluidized bed (CFB) boiler in Shuozhou, Shanxi, primarily utilizes coal gangue as its main fuel. To achieve ultra-low NOx emissions, the oxygen concentration in the dense phase zone of the fluidized bed boiler is maintained at a low level. Under low-oxygen conditions, the high ash content characteristic of coal gangue has a particularly significant impact on its combustion behavior. However, there is currently no research on the effect of ash layer diffusion resistance on combustion characteristics under low-oxygen conditions. Therefore, this study establishes a

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42

Leckner, Bo. "Developments in fluidized bed conversion of solid fuels." Thermal Science 20, suppl. 1 (2016): 1–18. http://dx.doi.org/10.2298/tsci150703135l.

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A summary is given on the development of fluidized bed conversion (combustion and gasification) of solid fuels. First, gasification is mentioned, following the line of development from the Winkler gasifier to recent designs. The combustors were initially bubbling beds, which were found unsuitable for combustion of coal because of various drawbacks, but they proved more useful for biomass where these drawbacks were absent. Instead, circulating fluidized bed boilers became the most important coal converters, whose design now is quite mature, and presently the increments in size and efficiency ar

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43

Schneider, Tanja, Dominik Müller, and Jürgen Karl. "Effect of Natural Ilmenite on the Solid Biomass Conversion of Inhomogeneous Fuels in Small-Scale Bubbling Fluidized Beds." Energies 15, no. 8 (2022): 2747. http://dx.doi.org/10.3390/en15082747.

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Abstract (sommario):

The application of oxygen carriers as alternative bed material in fluidized bed combustion originates from chemical lopping processes. They serve as oxygen transport agents undergoing consecutive redox cycles. Thereby, oxygen carriers can provide surplus oxygen in oxygen-lean areas of fluidized bed combustion processes. In turn, re-oxidation takes place in oxygen-rich reactor parts. A more homogeneous combustion and reduced CO emissions follow during steady-state operation. However, especially regarding solid biomass conversion, inhomogeneous fuel qualities result in transient combustion condi

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44

Cojbasic, Zarko, Vlastimir Nikolic, Ivan Ciric, and Ljubica Cojbasic. "Computationally intelligent modeling and control of fluidized bed combustion process." Thermal Science 15, no. 2 (2011): 321–38. http://dx.doi.org/10.2298/tsci101205031c.

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In this paper modelling and control approaches for fluidized bed combustion process have been considered, that are based on the use of computational intelligence. Proposed adaptive neuro-fuzzy-genetic modeling and intelligent control strategies provide for efficient combining of available expert knowledge with experimental data. Firstly, based on the qualitative information on the desulphurization process, models of the SO2 emission in fluidized bed combustion have been developed, which provides for economical and efficient reduction of SO2 in FBC by estimation of optimal process parameters an

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45

Olofsson, Göran, Zhicheng Ye, Ingemar Bjerle, and Arne Andersson. "Bed Agglomeration Problems in Fluidized-Bed Biomass Combustion." Industrial & Engineering Chemistry Research 41, no. 12 (2002): 2888–94. http://dx.doi.org/10.1021/ie010274a.

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46

Jadlovec, Marek, and Stanislav Honus. "Developing of experimental combustion boiler with stationary fluidized bed and multifuels combustion." MATEC Web of Conferences 345 (2021): 00014. http://dx.doi.org/10.1051/matecconf/202134500014.

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Abstract (sommario):

Due to the outdated higher requirements for reducing emissions of harmful substances in the combustion of fossil fuels and waste in particular, more and more research is needed, which will lead to the provision of various alternatives to influence the emerging pollutants into the atmosphere. This study deals with the development of experimental combustion units with a stationary fluidized bed with regulated parameters of primary and secondary air supply, performed fuel supply and flue gas parameters. Combustion is carried out in a bubbling stationary fluidized bed with a height of 100 mm and a

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47

Saxena, S. C., N. S. Rao, and L. A. Thomas. "Combustion of propane and fluidized-bed co-combustion." Energy 18, no. 10 (1993): 1045–57. http://dx.doi.org/10.1016/0360-5442(93)90053-g.

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48

Constable, T. W., R. Kissel, S. E. Sawell, and W. Cunningham. "Laboratory evaluation of solid residues from atmospheric fluidized bed combustion systems." Canadian Journal of Civil Engineering 15, no. 1 (1988): 49–57. http://dx.doi.org/10.1139/l88-005.

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Abstract (sommario):

Tests and analyses were conducted to characterize the physical, chemical, exothermic, and leaching properties of solid residues from bubbling bed atmospheric fluidized bed combustion units. The residues were produced during the combustion of eastern Canadian high-sulphur bituminous coals (4–8% sulphur) in a bed of eastern Canadian limestone. The residues were highly buffered and composed primarily of calcium and sulphur salts. They were exothermic and swelled considerably when contacted with water. Leachates generated during 20-cycle serial batch leaching tests were highly alkaline with high t

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49

Nemoda, Stevan, Milijana Paprika, Milica Mladenovic, Ana Marinkovic, and Goran Zivkovic. "Two-dimensional mathematical model of liquid fuel combustion in bubbling fluidized bed applied for a fluidized furnace numerical simulation." Thermal Science 22, no. 2 (2018): 1121–35. http://dx.doi.org/10.2298/tsci170922307n.

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Abstract (sommario):

Lately, experimental methods and numerical simulations are equally employed for the purpose of developing incineration bubbling fluidized bed (BFB) facilities. The paper presents the results of the 2-D CFD model of liquid fuel combustion in BFB, applied for numerical simulation of a fluidized bed furnace. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The proposed numerical model comprises energy equations for all three phases (gas, inert fluidized particles, and liquid

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50

Yang, Jian Meng, Bi Zheng Wang, and Wei Wang. "Lignite-Fired CFB Boiler SO₂, NO Emission Control Technology Research." Advanced Materials Research 989-994 (July 2014): 256–59. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.256.

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Abstract (sommario):

For study on SO2 and NO emission characteristics of circulating fluidized bed boiler experiments were carried out in a 300MW circulating fluidized bed boiler. In these experiments, the variables were the amount of limestone and bed temperature. While conducting the test, the reasons for the changes in emission were analyzed, and some advices about combustion adjustment were proposed.

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