气化参数对生物质高温蒸汽/空气气化过程的影响  

Effects of Gasification Parameters on Steam/Air Gasification Process of Biomass at High Temperature

作　　者：姚灿[1] 田红[1] 陈斌斌[1] 热冰娣[2] 刘正伟[1] YAO Can TIAN Hong CHEN Binbin RE Bingdi LIU Zhengwei(College of Energy ＆ Power Engineering, Changsha University of Science ＆ Technology, Changsha 410114, China Beijing A ero- Top Hi-Tech Co., Ltd, Beijing 100176, China)

机构地区：[1]长沙理工大学能源与动力工程学院,湖南长沙410114 [2]北京航天拓扑高科技有限责任公司,北京100176

出　　处：《工业炉》2017年第3期10-16,共7页Industrial Furnace

基　　金：国家自然科学基金资助项目(51276023);湖南省自然科学基金资助项目(2015JJ4005);湖南省教育厅优秀青年资助项目(16B001)

摘　　要：利用Aspen Plus软件对生物质(玉米秸秆,杉木)的高温蒸汽/空气气化过程进行了模拟研究,模拟值与实验值吻合较好,并利用该模型研究了气化剂预热温度,水蒸汽通入量(S/B)及空气当量系数(ER)对气化产气组分、碳转化率及产气热值等气化指标的影响。研究结果表明:提高气化剂预热温度有利于提高产气中H_2和CO含量、产气热值和碳转化率;增大S/B值可提高H_2含量和碳转化率,降低CO含量,产气热值先增加后减少,当S/B等于1.5时产气热值存在最佳值;增大ER值有利于提高碳转化率,但对H_2含量及产气热值具有负面作用,CO含量先增加后减少,CO_2含量先减少后增加,且当ER值为0.15时CO含量达到最大值,CO_2含量达到最小值。Applying Aspen Plus software, the biomass （corn stalk, Chinese fir） steam/air gasification process at high temperature was simulated. It is shown that the simulative results agree well with the experimental ones. It was studied the influences of changing operation parameters （gasifiying agent preheated temperature, steam to biomass ratio（S/B） and air equivalence ratio（ER） on the gasification indexes（gasifica- tion gas composition, carbon conversion and calorific value of gas） through the mathematical model. The re- sults show that increasing the gasifiying agent preheated temperature is beneficial to improve the volume fraction of H2 and CO in gas production, calorific value of gas and carbon conversion. Increasing the steam to biomass ratio （S/B） can improve the volume fraction of H2 and carbon conversion, decrease the volume fraction of CO. Further more, with the increasing of S/B the calorific value of gas increases first and then decreases, and when S/B equals is 1.5, it has the optimum value. Increasing the air equivalence ratio（ER） is beneficial to improve carbon conversion, but it produces negative function on the gas yield of H2 and ealorifie value of gas. With the increasing of ER, the volume fraction of CO, increases first and then de- creases, the volume fraetion of CO2 shows reverse trend. When ER equals 0.15, the volume fraction of CO reaches the maximum and the volume fraction of CO2 reaches the minimum.

关 键 词：高温蒸汽/空气气化 气化剂预热温度 水蒸汽通入量(S/B) 空气当量系数(ER) ASPEN Plus模拟 

分 类 号：TK6[动力工程及工程热物理—生物能]