Application and Performance Evaluation of Condensed Mist Eliminator in Desulphurization System

doi:10.11930/j.issn.1004-9649.201704099

Abstract

Abstract: In order to realize the ultra-low emissions, a 600 MW coal-fired unit is retrofitted by replacing the original demister in desulphurization tower (two-stage roof type demister plus one-stage tubular demister) with the condensed mist eliminator. The condensed mist eliminator consists of three-stage ridge-type high-efficiency demister and condensed wet layer. In addition, a cooling station outside the tower composed of a spray cooling water pump and a closed cooling equipment is provided. The droplet emissions as well as overall collaborative efficiency of dust collection and SO₃ desulfurization efficiency of whole desulfurization system were tested under 50% and 100% working conditions respectively by adjusting the operating mode of outside cooling tower of the condensing demister. The test results show that the thermal capacity of the cooling station has significant influence on the operation performance of the condensing mist eliminator. Enhancing the heat transfer at the cooling station is helpful to improve the removal efficiency of droplet, dust and SO₃.

Key words: coal-fired power unit, desnifurization system, condensing mist eliminator, cooling station, synergistic dust removal, performance evaluation of synergistic removal

CLC Number:

TM621.9
X51

WANG Fengji, YOU Liangzhou, ZHU Yue, HU Da. Application and Performance Evaluation of Condensed Mist Eliminator in Desulphurization System[J]. Electric Power, 2018, 51(4): 143-148.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201704099

https://www.electricpower.com.cn/EN/Y2018/V51/I4/143

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