林产废弃物高温水蒸气气化制取清洁燃气  

High-temperature Steam Gasification of Forestry Wastes for Production of Clean Gas

作　　者：牛永红[1] 韩枫涛 陈义胜[2] 王丽[2] 郭宁[1] 

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]内蒙古科技大学分析测试中心,内蒙古包头014010

出　　处：《动力工程学报》2016年第7期551-555,588,共6页Journal of Chinese Society of Power Engineering

基　　金：内蒙古自治区科技创新引导奖励资助项目(01850401);内蒙古科技大学科技创新基金资助项目(2015038);内蒙古自然基金资助项目(2015MS0106)

摘　　要：基于下吸式固定床气化炉,自建了生物质蒸汽气化实验平台,使用松木屑预处理后的成型颗粒进行富氢气化实验,研究分析了不同温度下的燃气组分、产氢率、燃气产率、燃气热值和冷煤气效率等指标.结果表明:高温水蒸气能有效促进水蒸气重整反应正向进行;随着温度的升高(700℃升高至900℃),H_2体积分数增大了50%,产氢率升高了2.5倍,燃气产率升高了近70%,冷煤气效率提高了37%;参与气化反应的高温水蒸气拥有较高的比焓,能够有效促进水蒸气重整反应向生成H_2的方向进行;气化温度的升高可以促进反应向正向进行,提高气体产物产量;以松木屑为例的林产废弃物高温水蒸气气化产气优良,在实验过程中稳定燃烧,理论上可应用于工业生产.An experimental platform for steam gasification of biomass was built based on downdraft gasifier, which makes use of pine sawdust briquette to produce hydrogen-rich gas, so as to analyze the gas composition, hydrogen yield, gas yield, gas calorific value and coal gas efficiency at different temperatures. Results show that the high-temperature steam can effectively promote the forward reaction of steam reforming. When the gasification temperature rises from 700 ℃ to 900℃, the H2 volume fraction, the hydro- gen yield, the gas yield and the cold gas efficiency would be increased by 50% , 2.5 times, 70% and 37% , respectively. The steam reforming reaction can be accelerated towards the generation of H2 by high specific enthalpy contained in the high temperature steam involved in the reaction. The rise of gasification temperature helps to boost the forward reaction for more output of gas product. The gas produced in high-temperature steam gasification of forestry wastes, like pine sawdust, etc. , is of high grade, which is able to burn stably in the experiment and therefore is theoretically considered to be available in commercial process.

关 键 词：林产废弃物 高温水蒸气气化 清洁燃气 气化指标 

分 类 号：TK6[动力工程及工程热物理—生物能]