fluidized bed combustion in practice
fluidized bed combustion dekker mechanical engineering
Ngày tải lên :
02/04/2014, 14:57
... DURING 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 ... particle combustion 4.6.3 Carbon (char) particle burning models 4.6.4 Mathematical modelling of single char particle combustion in a fluidized bed 4.6.5 Char combustion kinetics in fluidized beds—experimental ... beginning of the sixties, the National Coal Board in Great Britain initiated studies on coal combustion in fluidized beds in order to increase coal consumption and regain the markets lost in...
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proceedings of the 20th international conference on fluidized bed combustion
Ngày tải lên :
02/04/2014, 15:01
... in China Thus, not much research was done on limestone additives in fluidized bed Even CFB combustion has practiced in China 10 Proceedings of the 20th International Conference on Fluidized Bed ... ~ ~ ~ first melting - To 80 ~17 700 800 900 Temperature laC] Fig Sintering of bed material during biomass combustion in the fluidized bed (combustion of saw dust in a fluidized bed of quartz sand ... 30 Proceedings of the 20th International Conference on Fluidized Bed Combustion made in recent years in the understanding of the complex phenomena of bed sintering, superheater fouling and high...
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ENCYCLOPEDIA OF ENVIRONMENTAL SCIENCE AND ENGINEERING - FLUIDIZED BED COMBUSTION pps
Ngày tải lên :
10/08/2014, 20:20
... has been important in maintaining the bed quality and agglomerations can be avoided if the feed is started in short bursts prior to being 406 FLUIDIZED BED COMBUSTION continuous; this is to allow ... 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 ... the dominant FBC choice in industry The most common problems that have been associated with bubbling beds include erosion of the inbed tubes This can be reduced through the use of studding, fins,...
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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
... acid-producing rock 19 d Subsidence control in underground mines e Filling underground mine voids to control acid drainage f Pit filling to reach approximate original contour in surface mines g ... identified an increase in 0.1 units in pH of the ground, an increase in the capacity of cationic interchange and the interchangeable Ca, and a noticeable diminution in the concentration of interchangeable ... and sustainable development Industrial ecology views industrial systems in concert with their surroundings, not in isolation from them It brings together environmental sciences, engineering, management,...
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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
... 0.8 1.2 Lacey Mixing Index, M (-) Figure 10: Dimensionless mixing factor, K vs Lacey mixing index, M (-) for fluidized bed CONCLUSION Solids mixing is an important process in many industrial like ... tracking technique Canadian Journal of Chemical Engineering, 77, 253–261 Stein, M., Ding, Y.L., Seville, J.P.K & Parker, D.J (2000) Solids motion in bubbling gas fluidised beds Chemical Engineering ... bubbling fluidized bed in this study Figure 2: Experimental set-up for of the fluidised bed used in this work 3.2.2 Experimental method Batch experiments were carried out in Perspex fluidized bed...
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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
... This explains, that the increase in concentration of hydrogen and carbon monoxide in produced gas by increasing steam temperature, ISSN 2076-2895 (Print), ISSN 2076-2909 (Online) ©2014 International ... out at fluidized bed atmospheric 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 ... steam heat in reheater to 450 °C Blower-compressed air is delivered to the gasifier, to under its grate, as primary air ensuring partial oxidization of fuel and maintaining the fluidized bed Moreover,...
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Tar abatement for clean syngas production during biomass gasification in a dual fluidized bed
Ngày tải lên :
29/07/2016, 14:02
... grain filling procedure to realize the fixed bed was avoided [24] The combined catalytic filter was tested with naphthalene as model tar compound and also in experiments in a bubbling fluidized bed ... monolith integrated in the hollow cylindrical space of the catalytic filter candle [24] The incorporation of the monolith increased the Ni load of the catalytic filter Promising results were obtained ... flexibility to integrate a custom-made tar reforming catalyst and their capability to integrate high amount of this catalyst in the hollow cylindrical space inside the filter candle considering the limitations...
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Biomass Gasification with CO2 in a Fluidized Bed
Ngày tải lên :
29/07/2016, 14:03
... gasification in this study was based on the lab-scale D bubbling fluidized bed gasifier, which was operated at the Institute of Energy Engineering at TE Berlin Institute of Technology [24], as shown in ... temperature decreased with increasing mass percentage of RI CO2 in gasifying agent at any CO2-to-biomass ratio With increasing CO2 percentage in the SC gasifying gas or decreasing CO2-to-wood ratio, ... 623 K was fed into the gasifier through fuel inlet PT under atmospheric pressure RI 2.2 Governing equations SC In this study, due to the high solid fraction in the bubbling fluidized bed, the Eulerian...
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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
... entering the impingers The sampling train consisted of four borosilicate glass impingers connected in series and fitted with ground taper joint with O-rings seals The impinger train was placed in ... species in dry syngas, w/N2, ppm H2S COS 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 ... output streams by leaving in the gas phase or binding/retaining with solid particulates, thus Q i ;In ¼ Q i;fuel þ Q i ;bed ð5Þ Q i;out ¼ Q i;gas þ Q i;char þ Q i ;bed0 ð6Þ where, Qi ,In and Qi,out are...
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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
... and elutriation or fly ash (index 3) between the mass fraction of carbon in the char remaining in the bed, wc,ch,b, and that in the whole bed, which includes also the inert additives, wc,b = mc,b/mT,b ... applied to obtain the solution (ii) the char 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 ... contents in the entering char (ch) stream and in the char found in the bed (b) The solids are assumed to be perfectly mixed in the reactor so wc,ch,2 = wc,ch,3 = wc,ch,b as indicated in Fig The...
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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
... the heat is mainly lost through the syngas cooling and upgrading process as well as the increase in Fw,HHV This increase could be caused by the increase in excess water vapor content in the syngas ... presented in the SCBTL system diagram [8] The gasification and combustion processes occur in separate reactors Olivine is used as bed material in the SDFB gasifier to transfer the heat from combustion ... ȘFTL,HHV,ann while increases Șelec,ann significantly The decrease in ȘFTL,HHV,ann and SSann can explain the increase in QFTL,HHV,ann / Qfeed,HHV,ann with Fw,HHV Moreover, the increase in Șelec,ann...
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Airblown gasification of woody biomass in a bubbling fluidized bed gasifier
Ngày tải lên :
01/08/2016, 09:30
... of the gasifier, the main combustion reaction occurs within narrower regions comparing to other cases In addition, leveling-off of temperature in the fluidized bed is less since FN is less than ... a bubbling fluidized bed with top fuel feeding system has sequential reaction pathway from the top In the view point of fuel, it experiences drying, pyrolysis, gasification and combustion In the ... LHV LNG LPG Bubbling Fluidized Bed Circulating Fluidized Bed lower heating value liquefied natural gas liquefied petroleum gas ER FN PAHs RPM compositions and quality Low heating value (LHV) of...
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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
... alternating dot dash line in Fig The results from incorporating the new kinetics model into the old FBG model structure differ from the results obtained from the current FBG model, despite both using ... by Konttinen et al but using the HRPM, and the current model described in Section 2.4 Table Operating conditions for pilot scale tests using pine sawdust (SD) [20], corresponding to modeling results ... apparent instantaneous reactivity in ith section of gasifier model (1/s) temperature (°C) total bed inventory (kg) weight percentage of carbon in char in the bed (–) weight percentage of carbon in char...
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Artificial neural network models for biomass gasification in fluidized bed gasifiers
Ngày tải lên :
02/08/2016, 09:34
... gasification in an atmospheric pressure steam fluidized bed gasifier They used as input variables the bed temperature and the stock residence time Taking into account only these two input Table ... bubbling fluidized bed biases circulating fluidized bed equivalence ratio (À) mass fraction% of fixed carbon in dry biomass matrix weight mass fraction% of H2O mass fraction% of volatile matter in ... experimental data for wood gasification in atmospheric pressure and inert bed reactors was considered Data for circulating fluidized bed ANN model was obtained for air gasification of wood from...
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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
... adsorbent to insert metal cations and tar 3.5 Mixing-simulation in fluidized bed gasifier (FBG) Gasification of biomass and wastes in FBG has advantages, since FBGs are capable of being used in the pilot ... from the bed or to sink from the bed surface than devolatilizing particles The reason is that the jet force from escaping volatile matters tends to keep them floating A key issue in modeling FBG ... the intersecting point of the curve of fixed bed at defluidization with the constant pressure line at the flow condition Moreover, the minimum fluidization velocity umf can increase with the increase...
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Grammar in practice 1 thực hành ngữ pháp tiếng anh cơ bản
Ngày tải lên :
17/08/2013, 11:13
... lying sitting wearing writing driving B 're sunbathing is lying 's wearing is lying is swimming ~ having is shining C aren't working isn't raining isn'[ driving isn'( reading 2rcn'[ wearing o Answers ... h
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Grammar in practice 1 thực hành ngữ pháp tiếng anh cơ bản
Ngày tải lên :
20/08/2013, 07:23
... stress! Một ví dụ khác: từ interesting! Tôi hỏi, từ phải đọc in- tơ-res-ting hay in- tơ-ris-ting đúng? Chẳng đúng, chẳng sai Nhưng lối đặt vấn đề sai! Từ chủ yếu nói in cho thật rõ (stress) sau ... họ nghe: in- trstng; để rõ phụ âm họ nói in- tr(i)st(i)ng; in- tr(ơ)st(ơ)ng; in- tr(e)st(ư)ng Mà âm (i) (ơ), để làm rõ phụ âm, nhỏ nhanh đến độ không rõ âm Trái lại, đọc to rõ in- tris-ting, người ... nhiên, thông minh có nhiều kinh nghiệm Tiến trình Viết - Đọc - Nói - Nghe! Vì thế, muốn nghe nói tiếng Anh, chuyện phải quên kinh nghiệm trí thông minh, để trở lại trạng thái ‘sơ sinh nít’, đừng...
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Research on MAP Recovery Conditions using a Fluidized-bed Crystallized Phosphorous Removal System
Ngày tải lên :
05/09/2013, 08:40
... mg/L MAP was formed by adding magnesium and adjusting the pH pH Settling tank The experimental apparatus (see Figure 1) comprised a fluidized- bed reactor (inner Fluidized- bed reactor diameter of ... Ammonia and phosphorus contained in wastewater was crystallized using a fluidized- bed crystallized phosphorus removal system The following are conclusions a) Continuous tests indicated that compared ... microcrystallization P of solbility particle size Also indicated was an increase in the P of organic T-P concentration in the treated water due to an 100% increase in the influent phosphorus load The phosphorus...
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Experimental investigations and CFD study of temperature distribution during oscillating combustion in a crucible furnace
Ngày tải lên :
05/09/2013, 14:59
... melting time was lower with oscillating combustion mode • Decrease in 19 minutes of melting time was observed during oscillating combustion mode • During the oscillating combustion mode, the combustion ... during the oscillating combustion mode depending upon the operating condition than conventional combustion mode • There was considerable increase in furnace efficiency during the oscillating combustion ... causing oscillations in the flow resulting in oscillating combustion The inlet velocity of the fuel was changed where as the combustion air inlet velocity kept constant During the oscillating...
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Tài liệu The Insider’s Guide to PR: Chapter 6 PR IN PRACTICE The following case studies are examples of PR pptx
Ngày tải lên :
13/12/2013, 04:15
... resulted in a number of major disability charities writing to Ministers in support of the amendment Page 16 The Insider’s Guide to PR: Chapter Results • Following lengthy debate at Committee Stage in ... covered food safety in class, up 10% from the September findings Background The Government’s flagship Transport Bill, as originally drafted, included a clause that would have allowed minicabs to carry ... that this move was merely one piece in a very large jigsaw as eVestment sought to transform itself from internet incubator to an investment-banking group within a six-month time frame From August...
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