期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 35, 期 5, 页码 1065-1072出版社
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-018-0008-x
关键词
Ash Deposition; Coal Gasification; Entrained Gasifier; Numerical Model; Slag Layer
资金
- Establishment and Utilization of Clean Fuel Test Bed project - Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Knowledge Economy of the Korean Government [20152010201970]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20152010201970] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The viscosity-temperature relation of slag determines its behavior inside an entrained flow coal gasifier. However, existing prediction models give results with large variations among them. We investigated the influence of different viscosity models in the prediction of the steady and transient behaviors of slag flow on the wall of a gasifier undergoing gas temperature changes. Five viscosity models adopted showed differences in the temperature (T-250) at 25 Paa (TM) s as large as 97 K for the selected slag composition, which was used as the interface temperature between the solid and liquid slag. When the predicted viscosity and corresponding T-250 increased, the solid slag became thicker and the dynamic response of the slag became slower. In contrast, the differences in the liquid slag thickness were small. The influence of T-250 predicted was dominant, compared to that of different viscosity curves of the liquid slag.
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