Analysis on High Temperature Corrosion of a 600 MW Boiler Furnace After Low NOx Combustor Retrofitting

doi:10.11930/j.issn.1004-9649.201702103

Abstract

Abstract: Aiming at the problem of corrosion occurred in the cold ash hopper area of a 600 MW coal-fired boiler after low NO_x combustor retrofitting, the cause analysis is conducted in this paper by adopting testing and numerical simulation. The test results show that the volume fractions of H₂S and CO have bigger promotion at the primary and reducing zones of the furnace after retrofitting. The temperature field and flow field are analyzed through numerical simulation and the causes of high temperature occurrence are concluded as follows. Due to the palm air volume decreasing, the combustion deteriorates in the burners of Layer A, and the pulverized coal tends to deposit and burn at the bottom of the furnace. Therefore, the high temperature zone is formed. At the same time, lack of oxygen at the bottom of the furnace, and the high volume fraction of gases such as H₂S, make it easy to cause high temperature corrosion.

Key words: coal-fired power plant, boiler, high temperature corrosion, low nitrogen combustion retrofitting, numerical simulation, optimization and adjustment

CLC Number:

TM715
TK-9

HE Guilin, ZHANG Xiaoyu. Analysis on High Temperature Corrosion of a 600 MW Boiler Furnace After Low NO_x Combustor Retrofitting[J]. Electric Power, 2017, 50(10): 110-115.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201702103

https://www.electricpower.com.cn/EN/Y2017/V50/I10/110

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Analysis on High Temperature Corrosion of a 600 MW Boiler Furnace After Low NO_x Combustor Retrofitting

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