生物质流化床富氧气化过程热平衡模型  

THERMODYNAMIC EQUILIBRIUM MODEL OF BIOMASS GASIFICATION PROCESS WITH ENRICHED OXYGEN IN FLUIDISED BED GASIFIER

作　　者：黄亚继[1] 伏启让 牛淼淼[1] 杨高强[1] 邵志伟[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《太阳能学报》2016年第2期494-499,共6页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展(973)计划(2011CB201505);国家自然科学基金(51006023)

摘　　要：基于元素守恒、化学反应平衡和能量守恒,考虑碳不完全转化因素,建立生物质流化床富氧气化的热平衡模型。采用非平衡当量因子对气化反应平衡常数进行修正,修正后的模拟数据与文献数据吻合良好。利用该模型模拟富氧浓度和原料含水率对气体组分、气体热值和气化效率的影响。模拟工况下的结果表明:富氧浓度从21%增至100%,可燃组分含量增多,气体热值从6.37 MJ/m^3增至11.44 MJ/m^3,气化效率不断增大;原料含水率从零增至35%,气化炉温不断降低,可燃组分减少,气体热值从5.45 MJ/m^3降至4.65 MJ/m^3。Based on elements balance, chemical equilibrium and energy balance and considering char, the thermodynamic equilibrium model of biomass gasification with enriched oxygen in a fluidized bed gasifier was developed. The equilibrium constants of reaction were modified by multiple coefficients. The modified model was validated with the data reported in literature. Then the developed model was used to study the effects of oxygen content in enriched oxygen and biomass moisture content on gas components, the caloric value and gasification efficiency. The results show that rising oxygen percentage from 21% to 100% enhances the formation of H2 and CO, improves low heating value （LHV） from 6.37 MJ/m^3 to 11.44 MJ/m^3, also the gasification efficiency. When moisture content is increased from 0 to 35%, the gasification temperature and the combustible components gradually decrease, the low heating value declines from 5.45 MJ/m^3 to 4.65 MJ/m3.

关 键 词：生物质 富氧气化 热平衡模型 含水率 

分 类 号：TK6[动力工程及工程热物理—生物能]