基于热效率和㶲效率分析方法,研究循环流化床生物质气化过程中的主要参数（生物质种类、气化温度、水蒸气与碳的比值S/C和当量比ER）对气化系统㶲效率的影响。研究表明：在循环流化床生物质气化的诸多影响因素中,原材料的固定碳含量的变化对气化系统㶲效率影响最大：固定碳含量为8.99%的肉骨粉气化过程系统㶲效率最低为12.52%;固定碳含量为68.68%的晋城无烟煤气化过程系统㶲效率最高为59.95%,同时发现气化系统热效率与㶲效率的差值与所产气体的热值的关系。而其他增大气化参数（气化温度、S/C和ER）会提高㶲效率和热效率,但达到一定程度后将出现峰值,再升高温度将呈降低趋势。
Abstract
Based on the energy and exergy analysis method, this paper studies the main parameters of the circulating fluidized bed biomass gasification process. The influence of biomass types, gasification temperature, ratio of steam to carbon (S/C) and equivalence ratio (ER) on the exergy efficiency of the gasification system. Studies have shown that among the many influencing factors of circulating fluidized bed biomass gasification, the change of biomass type has the greatest impact on the exergy efficiency of the gasification system. The MBM gasification process with FC of 8.99% has the lowest exergy efficiency at 12.52%. The Jincheng coal gasification process with FC of 68.68% has the highest exergy efficiency at 59.95%. At the same time, the relationship between the difference between the energy efficiency and the exergy efficiency of the gasification system and the calorific value of the gas produced is found. The increase of other gasification parameters, gasification temperature, S/C and ER will increase the exergy efficiency and energy efficiency, but after reaching a certain level, the peak will appear and the temperature will decrease.
关键词
生物质 /
热效率 /
? /
气化 /
循环流化床 /
固体废弃物
Key words
biomass /
energy efficiency /
exergy /
gasification /
circulating fluidized bed /
solid waste
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参考文献
[1] SZARGUT J M, MORRIS D R, STEWARD F R.Exergy analysis of thermal, chemical, and metallurgical processes[M]. Berlin: Springer, 1988.
[2] LI X B, JIANG B C, ZHAO Y J, et al.Energy and exergy characteristics of syngas produced from air gasification of walnut sawdust in an entrained flow reactor[J]. International journal of exergy, 2017, 23(3): 244-262.
[3] DINCER I, ROSEN M A.Exergy as a driver for achieving sustainability[J]. International journal of green energy, 2004, 1(1): 1-19.
[4] CHEN B, CHEN G Q.Resource analysis of the Chinese society 1980-2002 based on exergy-Part 4: fishery and rangeland[J]. Energy policy, 2007, 35(4):2079-2086.
[5] ZHANG Y N, GAO X Y, LI B X, et al.Assessing the potential environmental impact of woody biomass using quantitative universal exergy[J]. Journal of cleaner production, 2018, 176: 693-703.
[6] PAMBUDI N A, FASOLA M, PERDANA L V, et al.Performance evaluation and optimization of fluidized bed boiler in ethanol plant using irreversibility analysis[J]. Case studies in thermal engineering, 2017, 10: 283-291.
[7] XIANG X N, GONG G C, WANG C H, et al.Exergy analysis of updraft and downdraft fixed bed gasification of village-level solid waste[J]. International journal of hydrogen energy, 2020, 46(1): 221-233.
[8] COUTO N, SILVA V, MONTEIRO A, et al.Exergy analysis of Portuguese municipal solid waste treatment via steam gasification[J]. Energy conversion and management, 2017, 134: 235-246.
[9] ZHANG Y N, XU P F, LIANG S, et al.Exergy analysis of hydrogen production from steam gasification of biomass: a review[J]. International journal of hydrogen energy, 2019, 44: 14290-14302.
[10] ADAM K, JOANNA B.CFD modelling of CO2 enhanced gasification of coal in a pressurized circulating fluidized bed reactor[J]. Energy, 2018, 160: 710-719.
[11] 张小桃, 李柯颖, 赵伟, 等. 燃煤锅炉掺烧生物质气运行效率及污染物排放模拟[J]. 农业工程学报, 2018, 34(11): 194-202.
ZHANG X T, LI K Y, ZHAO W, et al.Simulation on operation efficiency and pollutant emissions of coal-fired boiler with bio-gas co-firing[J]. Transactions of the Chinese Society of Agricultural Engineering, 2018, 34(11): 194-202.
[12] 黄亚继, 伏启让, 牛淼淼, 等. 生物质流化床富氧气化过程热平衡模型[J]. 太阳能学报, 2016, 37(2): 494-499.
HUANG Y J, FU Q R, NIU M M, et al.Thermodynamic equilibrium model of biomass gasification process with enriched oxygen in fluidized bed gasifier[J]. Acta energiae solaris sinica, 2016, 37(2): 494-499.
[13] CENGEL Y A, BOLES M A.Thermodynamics: an engineering approach[M]. New York: McGraw-Hill, 2009.
[14] FONYÓ Z.Fundamentals of engineering thermodynamics[J]. Journal of thermal analysis and calorimetry, 2000, 60(2): 707-708.
[15] CHANNIWALA S A, PARIKH P P.A unified correlation for estimating HHV of solid, liquid and gaseous fuels[J]. Fuel, 2002, 81(8): 1051-1063.
[16] MANSARAY K G, GHALY A E, AL-TAWEEL A M, et al. Air gasification of rice husk in a dual distributor type fluidized bed gasifier[J]. Biomass and bioenergy, 1999, 17(4): 315-332.
[17] ZHANG Y N, LI B X, LI H T, et al.Thermodynamic evaluation of biomass gasification with air in autothermal gasifiers[J]. Thermochemical acta, 2011, 519(1-2): 65-71.
[18] PARIKH J, CHANNIWALA S A, GHOSAL G K.A correlation for calculating HHV from proximate analysis of solid fuels[J]. Fuel, 2005, 84(5): 487-494.
[19] XIANG X N, GONG G C, WANG C H, et al.Exergy analysis of updraft and downdraft fixed bed gasification of village-level solid waste[J]. International journal of hydrogen energy, 2021, 46(1): 221-233.
[20] REN B, ZHAO Y L, BAI H Y, et al.Eco-friendly geopolymer prepared from solid wastes: a critical review[J]. Chemosphere, 2020, 267: 128900.
[21] PTASINSKI K J.Efficiency of biomass energy: an exergy approach to biofuels, power, and biorefineries[M]. Hoboken: Wiley, 2016.
[22] LI J G, LI F H, LIU W H, et al.Influence of pressure on fluidized bed gasifier: specific coal throughput and particle behavior[J]. Fuel, 2018, 220:80-88.
[23] WANG J B, CHENG G, YOU Y L, et al.Hydrogen-rich gas production by steam gasification of municipal solid waste (MSW) using NiO supported on modified dolomite[J]. International journal of hydrogen energy, 2012, 37(8): 6503-6510.
[24] HE M Y, XIAO B, LIU S M, et al.Hydrogen-rich gas from catalytic steam gasification of municipal solid waste (MSW): influence of steam to MSW ratios and weight hourly space velocity on gas production and composition[J]. International journal of hydrogen energy, 2009, 34(5): 2174-2183.
基金
湖南省自然科学基金省市联合基金（2021JJ50154）; 湖南省教育厅科学研究项目优秀青年项目（19B097）; 大学生创新创业训练计划（202111527018; S202011527002）
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