高灰熔点煤气化特性及灰渣熔融特性的研究  

Experimental Study on Gasification and Ash Fusion Characteristics of Coal with High Ash Fusion Temperatures

作　　者：乌晓江[1,2] 张忠孝[1] 徐雪元[2] 刘建斌[2] 张建文[2] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上海锅炉厂有限公司,上海200245

出　　处：《动力工程学报》2011年第7期557-562,共6页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(50906055);上海市青年科技启明星项目(11QB1402100)

摘　　要：在0.1-0.2 kg/h小型电加热式常压气流床气化装置上,研究了不同温度、不同O/C物质的量比对高灰熔点煤气化特性和煤灰熔融特性的影响.结果表明：在不同温度下,随着O/C物质的量比增加,CO2体积分数呈线性增加.当O/C物质的量比较低时,H2和CH4体积分数较高;随着O/C物质的量比的增加,合成气中H2和CH4的含量下降较快.在不同温度下,随着O/C物质的量比的增加,碳转化率增加;但当O/C物质的量比达到1.1时,进一步增大O/C物质的量比,则使得炉内煤焦及合成气中可燃气体（CO、H2、CH4等）的燃烧份额增加,从而导致冷煤气效率下降;在该文试验条件下的最佳O/C物质的量比为0.9-1.1.对于淮南高灰熔点煤,该试验条件下适合干排渣工艺的最佳气化温度为1 300-1 350℃.The effect of temperature and O/C molar ratio on coal gasification and ash fusion characteristics was studied in a 0.1~0.2 kg/h lab-scale electrical entrained-bed coal gasification setup.Results show that the yield of CO2 in syngas increases linearly with rising O/C molar ratio at different temperatures.When O/C molar ratio is at relatively low value,the yields of H2 and CH4 are relatively high,but the yields drop rapidly later on with increasing O/C molar ratio.The carbon conversion increases with growing O/C molar ratio at different temperatures.However,when the O/C molar ratio arrives at 1.1,with further increase of O/C molar ratio,more CO2 and H2O as well as less CO and H2 will be produced due to the increasing combustion share of combustible gases in char and syngas,such as CO,H2 and CH4,which subsequently lead to lower cold gas efficiency.Based on above test conditions,the optimum O/C molar ratio window is found to be 0.9-1.1 while the optimum temperature window is 1 300-1 350 ℃ for Huainan high ash fusion temperature coal with dry ash handling system.

关 键 词：气流床 煤气化 煤灰 O/C物质的量比 干排渣 灰渣熔融特性 冷煤气效率 

分 类 号：TM611.3[电气工程—电力系统及自动化]