文献类型：期刊文献

英文题名：The influence of swirling flows on pulverized coal gasifiers using the comprehensive gasification model

作者：Xu, Jianliang;Liang, Qinfeng;Dai, Zhenghua;Liu, Haifeng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem, Minist Educ, POB 272, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China

年份：2018

卷号：172

起止页码：142

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20180404664936);WOS:【SCI-EXPANDED(收录号:WOS:000425205300016)】；

基金：This work is supported by the National Natural Science Foundation of China (21376082, U1402272), the Shanghai Natural Science Foundation (15ZR1409500), and the Foundation of State Key Laboratory of Coal Conversion (Grant No. J16-16-301).

语种：英文

外文关键词：Comprehensive gasification model; Slag; Numerical simulation; Gasification; Swirl flow

摘要：The burner swirl intensity plays an important role in membrane wall safety and the gasification performance of pulverized coal, swirl gasifiers. The comprehensive gasification model (CGM), having two reaction regions and one radial heat transfer region, was used to simulate the influence of the swirl number (SN) on gasification performance, multiphase flow, reactions in the space, and reactions regarding the membrane wall. The results show that an SN of 0.66 is a critical point to divide low-swirl and high-swirl flows for the single-swirl-burner gasifiers of this study. Gasifier performance increases sharply with increased SN for low-swirl burners, whereas SN has little influence on gasifier performance (and multiphase flow) for high-swirl cases. In this paper, we examine the relationship between burner swirl and flow fields, temperature distributions in the space and on membrane wall, slag thickness, and the molten slag velocity distribution on the membrane wall. The influence of SN on these parameters is more remarkable at the top of the reattachment point than below it. The slag layer formed on the membrane wall isolates high-temperature gas effectively, except around the reattachment point. To guarantee gasifier performance and membrane wall safety, the burner SN should be between 0.66 and 0.9 for the single-swirl-burner gasifiers of this study.