考虑达西流的颗粒状生物质热解模拟  

PYROLYSIS SIMULATION OF GRANULAR BIOMASS CONSIDERING DARCY FLOW

作　　者：齐国利[1] 董芃[2] 管坚[1] 

机构地区：[1]中国特种设备检测研究院,北京100029 [2]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《太阳能学报》2018年第2期292-298,共7页Acta Energiae Solaris Sinica

基　　金：国家科技支撑计划(2014BAA02B02)

摘　　要：建立生物质热解及液体产物高温热裂解的化学反应动力学模型，该热解模型根据液体产物的特点将可凝挥发分分为生物质油和焦油。将化学反应动力学方程和能量方程耦合，通过数值模拟，分析温度、停留时间、粒径和压力等参数对生物质热解及焦油高温热裂解的影响，并将计算结果与文献中的实验数据进行对比。模拟结果表明：热解反应的吸热效应对温度场和反应进程有较大影响，大颗粒在靠近中心的几层在热解反应区出现一段温度近似维持恒定的水平段，在该阶段前后则是纯物质受热升温物理过程中常见的指数温升曲线，生物质油和焦油的质量析出规律不同。A chemical reaction kinetics model of biomass pyrolysis with liquid product pyrolysis at high temperature was established. The pyrolysis model could divide the condensable volatile into tar and biomass oil based on the characteristics of liquid products. The chemical reaction kinetics equation was coupled with energy equation to analyze the effects of temperature, residence time, particle size, pressure and other parameters on biomass pyrolysis and tar oil pyrolysis at high temperature through numerical simulation, and the computation results were compared with experimental date in literature. The simulation results showed that the endothermic effect of pyrolysis reaction on temperature field and reaction process is great ; an approximately constant horizontal section of temperature is appeared in the pyrolysis reaction zone for the several layers near the center of large biomass particles ; before or after this phase is the common exponential temperature rise curve in the physical process of pure substance by heating; the quantity precipitation rules for biomass oil and tar are different.

关 键 词：高温热解 可凝挥发分裂解数值模拟 达西流 热解模型 

分 类 号：TK6[动力工程及工程热物理—生物能]