Technical and Economic Investigation of Blended Combustion with Inferior Coal on 600 MW Unit Boiler

doi:10.11930/j.issn.1004-9649.201805205

Abstract

Abstract: In order to reduce furnace slagging, optimize the blending of inferior coal and increase power plant profit, technical and economic investigation of blended combustion with inferior coal on 600 mw unit boiler was processed through on-site tests, such as the blending ratio of low-grade coal, pulverizer combination, furnace flame temperature, reducing gas distribution, sulfur dioxide concentration, slagging behavior, etc. The results show that the unit can safely operate with three coal mills blended with high-sulfur coal, he maximum mixing ratio is 37%, and there is no obvious slagging in the boiler furnace; at the maximum blending ratio, the sulfur dioxide concentration in flue gas increases significantly, but the desulfurization system still has a large margin; the economic evaluation shows that the low price of low-grade coal reduces the cost of power generation significantly, although the blending slightly increases the net coal consumption rate. The on-site tests and economic evaluations provide ways and references for the optimization of the blending inferior coal for the same type units.

Key words: boiler, blended combustion, numerical simulation, slagging, economic evaluation

CLC Number:

TK227

ZHOU Lingmei, ZHANG Guanjun, ZHU Xianran, LI Haoyu, JIAO Kaiming. Technical and Economic Investigation of Blended Combustion with Inferior Coal on 600 MW Unit Boiler[J]. Electric Power, 2018, 51(9): 1-7.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201805205

https://www.electricpower.com.cn/EN/Y2018/V51/I9/1

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