文献类型：期刊文献

英文题名：Effects of the bubbles in slag on slag flow and heat transfer in the membrane wall entrained-flow gasifier

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

机构：[1]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, 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 100864, Peoples R China

年份：2017

卷号：112

起止页码：1178

外文期刊名：APPLIED THERMAL ENGINEERING

收录：;EI(收录号：20164603012196);WOS:【SCI-EXPANDED(收录号:WOS:000394831500110)】；

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; Bubble; Thermal conductivity; Viscosity

摘要：The slag from the industrial gasifier has porous structure, which has a non-ignorable influence on the characteristics of slag layer. The slag flow and heat transfer model were modified based on the effective thermal conductivity and viscosity, to predict the slag characteristics for the effects of bubbles in slag. The results show that bubbles inside slag reduce the slag thermal conductivity and viscosity. The modified model predicts the liquid slag velocity, slag layer thickness and heat flux of slag layer. The liquid slag flow velocity increases with the increase of bubbles inside slag, while the thickness of slag layer decreases. In addition, the increasing gas volume fraction of bubbles inside slag decreases the heat flux of slag layer. Two models are applied to calculate the bubbly slag effective thermal conductivity. The Maxwell-Eucken thermal conductivity model is more accurate than geometric mean model from the result of slag layer heat flux. (C) 2016 Elsevier Ltd. All rights reserved.