摘要
为了更详细地了解超细煤粉在热解时的反应机理,在高温管式沉降炉中,当炉膛温度为1 030℃、1 130℃、1 210℃和1 310℃时对煤粉进行快速热解实验,并测定热解气中轻质烃各组分的释放量。结果表明:随着煤粉粒径的减小,在大多数热解温度下轻质烃中CH4,C2(C2H2、C2H4、C2H6)和C3H8释放量先增加后减少;低阶煤的轻质烃释放量大于高阶煤;热解气氛对热解产物的释放量影响较大,CO2气氛下轻质烃各组分的释放量明显小于N2气氛下。
To accurately understand the reaction mechanism of superfine pulverized coal during rapid pyrolysis,a series of rapid pyrolysis experiments were conducted in a drop tube furnace respectively at the temperature of 1 030℃,1 130℃,1 210℃and 1 310℃,while the release amount of light hydrocarbon in the pyrolysis gas was determined using Gasmet DX4000 gas analyzer.Results illustrate that at most pyrolysis temperature with the decrease of particle size,the total release of light hydrocarbons CH4,C2(C2H2,C2H4,C2H6)and C3H8 first increases,and then reduces.Among different types of coal,it is obvious that the release of CH4,C2(C2H2,C2H4,C2H6)and C3H8 from low-rank coal is higher than that of high-rank coal.Pyrolysis atmosphere has a great influence on the release of pyrolysis products.In CO2 atmosphere,the release amount of various light hydrocarbons is significantly lower than that in N2 atmosphere.
作者
姚旺
罗雷
刘加勋
张海
马俊方
姜秀民
YAO Wang;LUO Lei;LIU Jiaxun;ZHANG Hai;MA Junfang;JIANG Xiumin(Institute of Thermal Energy Engineering,School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2019年第8期618-625,共8页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51776123)
关键词
超细煤粉
快速热解
轻质烃
反应机理
释放量
superfine pulverized coal
rapid pyrolysis
light hydrocarbon
reaction mechanism
release amount
