中型流化床中的生物质气化实验研究  

AN EXPERIMENTAL STUDY ON BIOMASS GASIFICATION IN A MEDIUM FLUIDIZED BED GASIFIER

作　　者：谢军[1] 吴创之[1] 陈平[1] 阴秀丽[1] 赵增立[1] 王磊[1] 

机构地区：[1]中国科学院广州能源研究所

出　　处：《太阳能学报》2007年第1期86-90,共5页Acta Energiae Solaris Sinica

基　　金：国家(863项目)高新技术研究发展计划(2001AA514010)

摘　　要：以空气为气化介质,在中型流化床反应器上进行了生物质(木屑)气化实验研究。考察了当量比ER(0.20～0.34)、气化温度(670～820℃)对气化结果的影响,初步探讨加入二次风对气化的影响。在实验研究的条件范围内,煤气热值在5650～6665kJ/m3范围内变化,生物质产气率在1.51～2.26m3/kg之间变化,碳转化率在74.3%～90.8%之间变化,气化效率达到61.8%～78.1%;加入适量二次风可以提高气化效率和碳转化率,减少焦油含量。实验结果表明:此流化床气化炉当气化温度在720～770℃之间,当量比ER在0.24～0.28之间时,气化效果最好,此时煤气热值可达到6400～6600kJ/m3,产气率为1.75～1.95m3/kg,碳转化率为83%～89%,气化效率高达71%以上。The characteristics of biomass （wood powder） gasification with air in a medium fluidized bed gasifier were studied through a series of experiments. The influence of equivalence ratio （0.2 - 0.34） , temperature （670 - 820℃ ） and secondary air in freeboard of the gasifier on gas lower heating value, gas yield, carbon conversion efficiency and gasification efficiency were investigated. The results showed that the gas yield ranges between 1.51m^3/kg and 2.26m^3/kg biomass and the lower heating value of produced gas ranges between 5650kJ/m^3 and 6665kJ/m^3. The carbon conversion efficiency and gasification efficiency were 74.3% - 90.8% and 61.8% - 78.1% ,respectively. The experiment results indicated that the optimal operational conditions are as following, equivalence ratio： 0.24 - 0.28; temperature： 720 - 770℃ ; lower heating value of produced gas： 6400 - 6600kJ/m^3 ; gas yield： 1.75 - 1.95m^3/kg; carbon conversion efficiency： 83% - 89% ; gasification efficiency, over 71% . The experiment results also showed that the addition of 10% of secondary air can improve the lower heating value, gas yield, the carbon conversion efficiency and gasification efficiency and reduce tar content.

关 键 词：生物质气化 流化床 二次风 

分 类 号：TK6[动力工程及工程热物理—生物能]