生物质流化床定向气化特性研究.docVIP

 生物质流化床定向气化特性研究# 杜胜磊，陈汉平，杨海平，李斌，王贤华，张世红** （华中科技大学煤燃烧国家重点实验室，武汉 430074） 5 10 摘要：为了解当地生物质原料的流化床气化特性，本文主要研究了气化温度，空气当量以及 催化剂的添加等对木屑、花生壳和麦秆等生物质流化床气化特性的影响。研究结果表明：木 屑气化产气具有较高的 CO 和 H2 含量，低位热值也较高；在 800下，随着空气当量比的 增加，产气量从 1.14 m3/kg 增加到 1.93 m3/kg，而产气热值从 7.09 MJ/m3 下降到 3.26 MJ/m3； 随着气化温度的升高，生物质气化气产量、可燃气含量以及产气热值都有明显的提高，说明 高温有利于生物质的气化；催化剂的添加有利于提高产生物质气化气的品质和脱除焦油，然 而生物质气化对催化剂的催化具有一定的选择性，且气化温度对催化剂催化性能的发挥也有 一定的影响，高温有利于催化剂作用的发挥。 关键词：生物质能；流化床；空气当量比；温度；催化剂 中图分类号：TK6 15 Experimental investigation of biomass controlling gasification in fluidized bed reactor DU Shenglei, CHEN Hanping, YANG Haiping, LI Bin, WANG Xianhua, ZHANG Shihong 20 25 30 35 40 (State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074) Abstract: This paper aims to catch the gasification property of local biomass resources in fluidized bed gasifier. The influence gasification temperatures, air equivalent ratios and catalyst addition on the gasification property of three biomass samples (peanut shell, sawdust and wheat straw) in fluidized bed. It can be observed that the gas product from sawdust gasification showed higher CO and H2 content, and the lower heat value (LHV) was much higher. At 800℃, with ER increasing, gas yield increased rapidly from 1.14 to 1.93 m3/kg, while LHV decreased from 7.09 to 3.26 MJ/m3. The combustible gas content, gas yield and LHV enhanced greatly with temperature increasing. It indicated that high temperature was favorable for biomass gasification. The addition of catalyst is significant for the upgrading of the quality of gas product from biomass gasification and the removing of tar. However, the catalytic of inorganic addition showed different effect as biomass sample variant. Temperature also displayed some influence on the catalytic and higher temperature is better for the full use of catalyst. Key words: biomass energy; fluidized bed; air equivalent ratio; temperature; catalyst 0 引言 生物质以其低硫、CO2 零排放以及存储量大等优点逐渐成为一种理想的可再生能源，我 国生物质资源丰富，