文献类型：期刊文献

英文题名：A deep insight on the correlation between slag viscosity fluctuation and decomposition of sulfur-bearing minerals in the entrained flow gasifier

作者：Shen, Zhongjie[1];Zhou, Jie[1];Liu, Xia[1];Liang, Qinfeng[1];Liu, Haifeng[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China

年份：2020

卷号：196

外文期刊名：ENERGY

收录：;EI(收录号：20200708155676);WOS:【SCI-EXPANDED(收录号:WOS:000527567200004)】；

基金：This study was supported by the China Postdoctoral Science Foundation (2018M632041), the Shanghai Engineering Research Center of Coal Gasification (18DZ2283900), the Fundamental Research Funds of the Central Universities (222201817004 and 222201814052).

语种：英文

外文关键词：Entrained flow gasification; Coal slag; Sulfur-bearing mineral decomposition; Bubble formation; Viscosity fluctuation

摘要：The fluctuation behavior of the coal slag viscosity in an entrained flow gasifier will increase the instability of the slag discharge and cause a blockage issue on the slag hole. The current research work gave a deep insight about the correlation between on the viscosity fluctuating behavior and the decomposition of the sulfur-bearing minerals in the coal slag. The measured viscosity-temperature curves of four coal slags with different sulfur contents showed different fluctuation behavior, ranging from 1200 to 1400 degrees C. Comparing to the fitting viscosity curve, the viscosity fluctuating difference and frequency increased with the increasing released gas volume, verified with a simulation experiment with malt syrup and argon. The decomposition and reaction of anhydride and CO was found to be critical to cause the bubble formation with the main gas phase of sulfur oxide inside. The capillary number (Ca) of the slag with bubbles was calculated and compared to the relative viscosity. Theoretical analysis showed a reverse tendency between the capillary number and relative viscosity of the slag, meaning the formation and deformation of bubbles during the slag transformation at high temperature and viscosity measurement process would cause the viscosity fluctuating behavior. (C) 2020 Elsevier Ltd. All rights reserved.