development of fluidized bed combustion boilers
proceedings of the 20th international conference on fluidized bed combustion
Ngày tải lên :
02/04/2014, 15:01
... Fluidized Bed Combustion CHARACTERISTICS OF PYROLYTIC TOPPING IN FLUIDIZED BED FOR DIFFERENT VOLATILE COALS R Xiong, L Dong, G W Xu 404 FLUIDISED BED COMBUSTION OF TWO SPECIES OF ... BOILER DEVELOPMENT HISTORY IN CHINA The history of CFB boiler development in China is the extension of that of fluidized bed combustion (FBC) boiler development, which began in 1960s on bubbling fluidized ... presence of flue gas for the combustion of salix [15] 31 POTENTIALS OF BIOMASS CO -COMBUSTION IN COAL-FIRED BOILERS When biomass is combusted in fluidized beds of quartz sand particles sintering of...
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ENCYCLOPEDIA OF ENVIRONMENTAL SCIENCE AND ENGINEERING - FLUIDIZED BED COMBUSTION pps
Ngày tải lên :
10/08/2014, 20:20
... FLUIDIZED BED COMBUSTION maintaining the transport (entrainment) of the bed material throughout the length of the combustor The density of the bed naturally varies with ... Deeper beds (typically m.) may be used in PFBCs because they are pressurized The residence time of a particle in the bed is longer than that of a particle in the shallower bed of a bubbling bed ... explanation involves the effect of fluidized bed gas circulation on bed chemistry An emulsion phase and a gas bubble phase FLUIDIZED BED COMBUSTION exist in any gas-solid fluidized bed Excess gas which is...
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industrial ecology approach to management of fly ash from fluidized bed combustion production of slow-release fertilizer and soil conditioner
Ngày tải lên :
13/11/2014, 09:49
... 2.2 Characteristics of Coal Combustion By-Products 2.2.1 Fly and Bottom Ashes 2.2.2 Fluidized Bed Combustion Wastes 11 2.2.3 Types of Coal Combustion Products ... 2.2.2 Fluidized Bed Combustion Wastes Fluidized bed combustion (FBC) is a process in which the pulverized coal is mixed with finely ground limestone (CaCO3) and the mixture is combusted in a fluidized ... use of Coal Combustion By-Products, Environmental Effects of Coal Combustion By-Products, Ion Movement with the Amendment of Soils, Powder Metallurgy, Slow-Release Fertilizers, Leaching of Solids...
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fluidized bed combustion dekker mechanical engineering
Ngày tải lên :
02/04/2014, 14:57
... PRODUCTION AND FLUIDIZED BED COMBUSTION TECHNOLOGY DEVELOPMENT Chapter DEVELOPMENT OF FLUIDIZED BED COMBUSTION BOILERS Problems of modern energy production and the requirements posed for coal combustion ... concept of devices for solid fuel combustion in fluidized bed Furnaces for production of hot gases or hot air Industrial boilers with bubbling fluidized bed combustion Bubbling fluidized bed combustion ... COAL COMBUSTION IN FLUIDIZED BEDS 4.1 Characteristic features of combustion in fluidized beds 4.1.1 Combustion conditions in fluidized beds 4.1.2 Physical processes during coal particle combustion...
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Báo cáo vật lý: "Mixing Behavior of Binary Polymer Particles in Bubbling Fluidized Bed" doc
Ngày tải lên :
07/08/2014, 14:20
... of Polymer Particles 14 mixing in bubbling fluidized bed is well-understood but it is still not possible to predict the effect of operating parameters on the degree of mixing in a fluidized bed. 7 ... distribution of the components Thus, for a binary mixture of spherical particles of components A and B with proportions of PA and PB, respectively, the number of particles of A or B per unit mass of component ... values of ρp used in this study are as per listed in Table 3.2 Mixing Properties of Particles in Fluidized Bed 3.2.1 Apparatus Figure shows the experimental set-up of the mixing fluidized bed The...
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KHÍ HÓA TẦNG SÔI Gasification of Biomass Using Fluidized Bed
Ngày tải lên :
21/01/2015, 16:53
... function of the H2 content, the optimum value of S / B is 2.10 Javier et al [11] studied the gasification of small chips of pine wood in bubbling fluidized bed and studied the effect of gasifying ... Overview of Combustion and Gasification of Rice Husk in Fluidized Bed Reactors Biomass & Bioenergy, 14, pp 533-546, 1998 R.Moghadam, A.Alias, Air gasification of agricultural waste in a fluidized bed ... Bubbling fluidized bed ID: 108 mm; total height :1400 mm External electric heating Water 5-20 kg / hr Screw feeder Air, Steam 650-950 ºC The details of components of the bubbling fluidized bed gasifier...
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Improve of produced gas quality by using air steam in fluidized bed gasifier
Ngày tải lên :
09/09/2015, 10:32
... gasifier with stationary fluidized bed called Biofluid 100 The experimental set-up, shown in (Figures and 2), consists of six main parts: (i) a fluidized bed reactor of atmospheric pressure, ... flow,P107…outlet gas pressure, Ppal tank pressure, DPfv fluidized bed pressure difference Figure Atmospheric fluidized bed gasifier Biofluid 100 ISSN 2076-2895 (Print), ISSN 2076-2909 (Online) ... Figure The effect of S/B and T101 on low heating value of produced gas 5.2 The optimal temperature of the steam The objective of these experiments is to determine the temperature of the feed steam...
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Parametric analysis of a circulating fluidized bed biomass gasifier for hydrogen production
Ngày tải lên :
29/07/2016, 14:03
... surfaces of ash particles, which make ash particles sticky Consequently, the fluidized bed system is changed to a fixed -bed system with the increase of bed temperature In this study, the fluidized bed ... approximately 0.8e1.2, which produces a gas composition of 60e62 vol.% of H2, 16e22 vol.% of CO, 17e21 vol.% of CO2, and 0.3e0.7 vol.% of CH4 The quality of the product gas is defined as its higher heating ... gasification of modified biomass Int J Hydrog Energy 2012;37:1409e17 [33] Liu H, Feng Y, Wu S, Liu D The role of ash particles in the bed agglomeration during the fluidized bed combustion of rice straw...
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Study on the fate of metal elements from biomass in a benchscale fluidized bed gasifier
Ngày tải lên :
29/07/2016, 14:03
... C4H4S Bed char, g Ash content in bed char, % Filter char, g Ash content in filter char, % Input of bed material Input of bed material, g Output of bed material Bed metatarsal/ (bed char + bed material), ... tests In the fluidized bed, unreacted char remained embedded with bed material that were difficult to separate Compared with the weight of char in the filter, the amount of bed char was commonly ... conclusion of a test and the system purged with N2 flow Solid samples remaining in the gasifier bed and filter chamber were collected after each test The char inventory of the bed was separated from the bed...
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Estimation of gas composition and char conversion in a fluidized bed biomass gasifier
Ngày tải lên :
29/07/2016, 15:39
... composition of the gas as a function of 1/s2 for given ER and Th is presented in Fig 10, revealing the great influence of the rate of bed extraction on the composition of the gas produced The amount of ... content in the bed mch,b is maintained to some prescribed value mch,b,crit in relation to the total inventory of the bed, mT,b, for instance to avoid accumulation of ash in the bed; Then s2 has ... properties of bed material and calculated char diameter in the bed, dch Calculation of CHO to be subtracted from QEM (Eqs (8)– (10)) Solution of QEM (Eqs (11)–(16)) for the calculation of the pseudo-gas...
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Two dimensional numerical computation of a circulating fluidized bed biomass gasifier
Ngày tải lên :
01/08/2016, 09:30
... phase per unit volume of bubble phase (1/s) number of components number of reactions Reynolds number reaction rate of j reaction (mol/m3 s) temperature (K) temperature of biomass particle (K) ... these figures, at the bottom of the gasifier, the concentration of CO2 is lower due to the existence of a large number of solid carbon, while it increases along the height of the A Gungor, U Yildirim ... the volatile combustion The amount of CH4 is higher in the bottom zone of the gasifier as a result of devolatilization and it does not change in the higher region due to the exhaustion of O2 It...
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FischerTropsch liquid fuel production by cogasification of coal and biomass in a solar hybrid dual fluidized bed gasifier
Ngày tải lên :
01/08/2016, 09:30
... bubbling fluidized bed air separation unit combustion reactor coal to liquid coal and biomass to liquid dual fluidized bed fraction in blends fast fluidized bed Fischer-Tropsch liquid greenhouse gas ... the bubbling fluidized bed (BFB) gasification reactor under temperature of ࡈC, at atmospheric pressure and under steam environment [11] Therefore, this reduction of the impact of Xchar,g is ... system via solar hybrid dual fluidized bed (SDFB) gasifier Therefore, the overall objective of this work is to assess the energetic and environmental performance of the SCBTL process with a SDFB...
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Reactivity tests of the wateregas shift reaction on fresh and used fluidized bed materials from industrial DFB biomass gasifiers
Ngày tải lên :
01/08/2016, 09:30
... insight into the capability of inorganic bed material particles, fresh olivine, used olivine and calcite, in the dual fluidized bed steam gasifier for the promotion of the wateregas shift reaction ... International Energy Agency; 2010 [2] Kern S, Pfeifer C, Hofbauer H Gasification of wood in a dual fluidized bed gasifier: Influence of fuel feeding on process performance Chem Eng Sci 2013 http://dx.doi.org/10.1016/ ... Hofbauer H Investigations on bed material changes in a dual fluidized bed steam gasification plant in Gu¨ssing, Austria Energy Fuels 2011;25:3793e8 Kirnbauer F, Wilk V, Kitzler H, Kern S, Hofbauer...
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Airblown gasification of woody biomass in a bubbling fluidized bed gasifier
Ngày tải lên :
01/08/2016, 09:30
... AN Overview of combustion and gasification of rice husk in fluidized bed reactors Biomass Bioenergy 1998;14:533–46 [23] Jain V, Groulx D, Basu P Study of heat transfer between an over -bed oil burner ... Gasification/ Combustion Combustion/ Air preheating 500 600 700 (a) 800500 600 700 800500 (b) 600 700 800 (c) o Temperature ( C) Fig Vertical temperature distribution of the gasifier as a function of FN of ... the view point of fuel, it experiences drying, pyrolysis, gasification and combustion In the view point of oxidizer, it experiences preheating and combustion and it turns into combustion gases...
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Modeling biomass char gasification kinetics for improving prediction of carbon conversion in a fluidized bed gasifier
Ngày tải lên :
01/08/2016, 09:31
... gasification; (iii) selection of a model to represent the effects of temperature, gas composition and carbon conversion in the form of a kinetics equation; (iv) development of a FBG model where the ... percentage of carbon in char in the bed (–) weight percentage of carbon in char from devolatilization (–) char conversion (–) overall fuel carbon conversion (–) fractional molar conversion of reactant ... gas in section i of FBG reactor model (–) ð2Þ As the purpose of this work is to model gasification of biomass in FBGs, the TGA experiments were designed to mimic the conditions of those gasifiers...
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Evaluation of different biomass gasification modeling approaches for fluidized bed gasifiers
Ngày tải lên :
01/08/2016, 09:32
... for any further development of any possible generic model This is one of the major novel contribution of this study to the field of biomass gasification modeling The investigation of further possibilities ... This means that the diameter of the bed must be provided to use MODEL III correctly The main limitation of this model is the requirement of the bed diameter or any type of similar factors that is ... to the gasification of coal in a fluidized bed [9] and an entrained flow bed [10], whereas other examples are of biomass gasification in a downdraft gasifier [11] and fluidized bed gasifiers [6] [12,13]...
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In situ catalytic conversion of tar using rice husk char/ash supported nickel–iron catalysts for biomass pyrolytic gasification combined with the mixing-simulation in fluidized-bed gasifier
Ngày tải lên :
02/08/2016, 09:35
... scale, fixed -bed gasifiers On the other hand, the bed temperature is limited to avoid the bed agglomeration and the gasification efficiency of a fluidized bed (FB) may be limited if part of the fuel ... catalytic steam gasification of biomass in a combined downdraft FB and fixed bed reactor The solids feed was composed of 15 wt.% of raw biomass and 85 wt.% of a mixture of sorbent and catalyst particles ... besides the inert bed material or solid catalyst, there is a distribution of fuel and char particles in the bed Therefore, the movement of solids in the vessel should be described by accounting...
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Development of indicators on consumer satisfaction and Pilot survey
Ngày tải lên :
23/10/2012, 11:54
... affordability, competitiveness of pricing, profitability of services (for banking and insurance), transparency of the pricing structure, easiness of the payment mechanisms and correctness of the invoices For ... for tenders for the development of a European set of indicators for consumer satisfaction and for the launch of a Pilot survey The assignment was awarded to a joint team of INRA Europe and Deloitte ... research o Organisation of focus group discussions o Model development o Questionnaire design o Conducting a Pilot survey o Statistical analysis of the survey data o Development of final guidelines...
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Báo cáo y học: "A prospective observational study of the relationship of critical illness associated hyperglycaemia in medical ICU patients and subsequent development of type 2 diabetes"
Ngày tải lên :
25/10/2012, 10:02
... root of hospital acquired hyperglycaemia and in the long term lead to development of diabetes Although the incidence of hospital acquired hyperglycaemia differed between the three subgroups of ... of the data Page of Author Details 1Department of Intensive Care Medicine, University Hospital Centre Rebro, Kispaticeva 12, Zagreb 10000, Croatia and 2Division of endocrinology, Department of ... the cut-off value in the Recommendations of the American Heart Association [35] and the trigger for initiation of insulin treatment for ICU patients recommended by the American College of Endocrinology...
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Báo cáo tiếng anh Ngoại thương Strategies of human resource development of MISA JSC.doc
Ngày tải lên :
27/10/2012, 16:40
... professional duty, software development center includes software development office in charge of researching, creating and develop new products and quality supervision office in charge of supervising ... enthusiasm of youth MISA’s achievement is efforts of group of officials and staff who strive for company’s development CHAPTER Strategies of human resource management and development of MISA JSC ... Activities of human resource development of MISA JSC Strategies of human resource development Strategies of human resource development play an important role in long-term strategy of MISA The...
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