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Performance Analysis on an Entrained‐Flow Gasifier by Coal Moisture
Author(s) -
Ju Youngsan,
Lee Hyeon-Hui,
Oh Min,
Lee Chang-Ha
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700129
Subject(s) - wood gas generator , coal , syngas , moisture , heat of combustion , waste management , slag (welding) , integrated gasification combined cycle , environmental science , water content , pulp and paper industry , materials science , chemistry , metallurgy , engineering , combustion , hydrogen , composite material , geotechnical engineering , organic chemistry
The performance of a 300‐MW‐class Shell entrained‐flow gasifier along with moisture contents in low‐rank coal was studied by a rigorous dynamic model. The developed model predicted the steady‐state reference data well. The gas and slag temperature profiles decreased with higher coal moisture content, which led to an increase of the slag thickness on the gasifier wall. The high‐moisture coal resulted in reduced power generation together with reduced low heating value ( LHV ) of syngas, higher amount of oxygen supply, and less energy recovery in the membrane. The amount of coal required to produce the same total LHV of syngas was smallest when the coal was dried to 5 % moisture. Therefore, the coal‐drying level for appropriate power production was between 5 and 10 %.