Main Characteristics of Coal Blending Method and Adaptability Analysis for Blended Coal

doi:10.11930/j.issn.1004-9649.201807113

Abstract

Abstract: In order to improve the safety and economy of coal blending in power plants, this paper fully analyzes the characteristics of intermittent blending, premixed blending and mixed combustion which have been commonly used in thermal power plants through a large number of laboratory and field test results. Also the interactions between blending method and blended coal combustion performance are analyzed comprehensively in combination with boiler design, operational features and combustion characteristics of blended-coals. Finally the paper puts forward the coal quality requirements of furnace coal and blended coals from the aspect of combustion performance. At the same time, according to the combustion performance of different blended-coals, the appropriate mixing combustion mode is recommended and precautions during the operation process are proposed. Moreover, the problems which are more likely to occur and corresponding solutions under different blending modes are given with real examples. The research results can provide references for coal blending and boiler operation parameter optimization.

Key words: thermal power plant, coal blending, blending requirements, blending mode, safety blending, economic blending

CLC Number:

TK229.6

YAO Wei, HAO Bing, LIU Jiali, FANG Shunli, ZHANG Xilai, WANG Zhichao. Main Characteristics of Coal Blending Method and Adaptability Analysis for Blended Coal[J]. Electric Power, 2018, 51(9): 20-27.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201807113

https://www.electricpower.com.cn/EN/Y2018/V51/I9/20

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