复合串行气化工艺半经验动力学模型研究  

Study on semi-empirical kinetic model of serial compound gasification process

作　　者：向夏楠 周雪花 彭德用 孙驰 王波 张新宇 XIANG Xianan;ZHOU Xuehua;PENG Deyong;SUN Chi;WANG Bo;ZHANG Xinyu(School of Municipal and Geomatics Engineering,Hunan City University,Yiyang 413000,China)

机构地区：[1]湖南城市学院市政与测绘工程学院,湖南益阳413000

出　　处：《热力发电》2022年第10期184-193,共10页Thermal Power Generation

基　　金：湖南省自然科学基金省市联合项目(2021JJ50154);湖南省教育厅科学研究项目优秀青年项目(19B097)。

摘　　要：研究了一种煤与固体废弃物复合串行气化工艺。以木屑为例,通过利用实测的气化炉分区温度结合流体动力学和气化反应动力学,建立了复合串行气化工艺的半经验动力学模型,并研究了气化温度、水蒸气与固体废弃物质量比(S/M)和固体废弃物与煤质量比(M/C)等关键参数对气化规律的影响。结果表明:该气化工艺采用水蒸气气化,无需外部热源,可生产中热值合成气;提高气化温度对气化结果有利,最佳气化温度为1010℃,最佳S/M为1.4;气化工艺中应尽可能提高M/C值,本模型最佳M/C值为4.0。研究结果可为复合串行气化工艺的运行和优化提供参考和理论依据。A coal and municipal solid waste(MSW)serial compound gasification process is investigated.Taking sawdust as an example,a semi-empirical dynamic model of the serial compound gasification process is established and the effects of key parameters such as gasification temperature,mass ratio of steam to MSW(S/M)and mass ratio of MSW to coal(M/C)on the gasification law are studied,by using the measured multi-zone temperature of gasifier connected with hydrodynamics and gasification reaction dynamics.The result shows that,the gasification process uses steam gasification without external heat source,which can produce medium-calorific value syngas.Enhancing the gasification temperature is favorable to the gasification results,the optimal gasification temperature is 1010℃and the most suitable S/M is 1.4.The M/C value should be increased as much as possible in this gasification process,and the optimal M/C value is 4.0 in this model.The research can offer reference and theoretical basis for operation and optimization of the serial compound gasification process.

关 键 词：流化床 复合串行气化 间歇气化 半经验模型 动力学模型 

分 类 号：TK121[动力工程及工程热物理—工程热物理]