摘要
为探究污泥与准东煤在CO2气氛下的共气化特性,利用电加热式固定床和热重分析仪研究了共气化产气特性规律及共气化动力学特性规律,并采用Model-free Method计算了共气化反应活化能。结果表明:等温气化过程中CO、H2和CH4的体积分数随着反应的进行先升高后降低;随着准东煤质量分数的增加,可燃气中CO体积分数逐步升高,H2和CH4体积分数逐步降低,冷煤气效率则先升高后降低;程序升温气化的干燥脱附阶段和慢速气化阶段,样品总失重量随着准东煤质量分数的增加而逐渐降低,在快速气化阶段则反之;共气化反应的平均活化能随着准东煤质量分数的增加先降低后升高;污泥与准东煤的掺混具有正向促进气化反应的协同作用,并且在污泥与准东煤质量比为4∶6时共气化的协同作用最强烈。
In order to explore the co-gasification characteristics of sludge and Zhundong coal in CO2 atmosphere, the characteristics of gasification products and co-gasification reaction kinetics were studied by thermogravimetric analyzer in an electric heating fixed bed.The activation energy of co-gasification was calculated by Model-free Method. Results show that the volume fraction of CO, H2 and CH4 in isothermal gasification process increases at first and then decreases with the reaction. With the increase of Zhundong coal content, the volume fraction of CO in combustible gas increases gradually, the volume fraction of H2 and CH4 decreases gradually, and the cold gas efficiency increases at first and then decreases. In the dry desorption stage and slow gasification stage of temperature programmed gasification, the total weight loss of samples gradually decreases with the increase of Zhundong coal content. However, in the rapid gasification stage, the total weight loss of samples decreases with the increase of Zhundong coal content. The average activation energy of co-gasification decreased first and then increased with the increase of Zhundong coal content. The mixing of sludge and Zhundong coal has a positive synergistic effect on the gasification reaction. When the mass ratio of sludge to Zhundong coal is 4∶6, the synergistic effect of co-gasification is the strongest.
作者
张志远
鞠睿
周恒涛
虞婷婷
陈鸿伟
ZHANG Zhiyuan;JU Rui;ZHOU Hengtao;YU Tingting;CHEN Hongwei(School of Energy&Architectural Environment Engineering,Henan University of Urban Construction,Pingdingshan 467000,Henan Province,China;Key Laboratory of Condition Monitoring and Control for Power Plant Equipment,Ministry of Education,North China Electric Power University,Baoding 071003,Hebei Province,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2021年第5期358-367,共10页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(50876030)
河南省重点研发与推广专项资助项目(212102310579)
河南省高等学校重点科研资助项目(20B480001)
河南省青年人才托举工程资助项目(2021HYTP020)。
关键词
污泥
准东煤
二氧化碳
共气化
冷煤气
动力学特性
sludge
Zhundong coal
carbon dioxide
co-gasification
coal gas
kinetics characteristic
