文献类型：期刊文献

英文题名：Modeling the slag flow and heat transfer with the effect of fluid-solid slag layer interface viscosity in an entrained flow gasifier

作者：Zhang, Binbin[1,2];Shen, Zhongjie[1,2];Liang, Qinfeng[1,2,3];Xu, Jianliang[1,2];Liu, Haifeng[1,2]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, POB 272, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Beijing, Peoples R China

年份：2017

卷号：122

起止页码：785

外文期刊名：APPLIED THERMAL ENGINEERING

收录：;EI(收录号：20172203705121);WOS:【SCI-EXPANDED(收录号:WOS:000403855200072)】；

基金：This study was supported by the Foundation of Shanghai Science and Technology Committee (14dz1200100), the National Natural Science Foundation of China (U1402272), the National Natural Science Foundation of China (21376082), and the Foundation of State Key Laboratory of Coal Conversion (Grant No. J16-17-301).

语种：英文

外文关键词：Gasification; Slag; Viscosity; Flow; Heat transfer

摘要：The characteristics of slag flow and heat transfer in a gasifier are significant for controlling the operation conditions. Determination of the fluid-solid slag layer interface is a crucial procedure in the studying of slag flow and heat transfer characteristics. The varied absolute viscosities were used as the fluid-solid slag layer interface viscosity to model the slag layer properties in an entrained flow gasifier. The results showed that with the increase of fluid-solid slag layer interface viscosity, the liquid slag layer thickness increased, while the solid slag layer thickness and the liquid slag velocity decreased. Moreover, the slag layer overall thickness had a slight decrease, while the slag heat flux had a slight increase. In addition, the effects of the fluid-solid slag layer interface viscosity on slag layer characteristics with glassy slag and plastic slag were relatively higher than crystalline slag. The smoother the viscosity-temperature profile, the higher the influences of the fluid-solid slag layers interface viscosity. The critical viscosity could be approximate regarded as the fluid-solid slag layer interface viscosity when the slag type was crystalline slag during the model derivation, and the fluid-solid interface viscosity can be defined as about 100 Pa s for plastic slag and glassy slag. (C) 2017 Elsevier Ltd. All rights reserved.