Water balance analysis for the flue gas water removing technology within ceramic membrane

doi:10.3969/j.issn.1674-1951.2021.05.008

Abstract

Abstract:

Water balance models for a desulfurization system and a water removal system were built to assess the capacity of ceramic membrane in water removal and wet plume eradication.The operation results of a 600 MW unit show that the exhaust gas temperature and unit load are directly proportional to the water captured by the water removal system.A boiler taking lignite as fire coal demands the least amount of process water supplement which is far exceeded by the water captured by the water removal device.To meet the requirement of wet plume eradication in winter,the captured water mounts up.The captured water increases by 25 t/h for every 10% increase in dewatering efficiency of the ceramic membrane,but the exhaust gas temperature at the chimney outlet will be lower.When the efficiency rises from 10% to 60%,the exhaust gas temperature falls by 14.28 ℃,and the plume rise height reduces by 176.5 m.In the proper condition,the plume removal technology of the water removal system can effectively reduce the water consumption made by the desulfurization system,which is of great significance to the overall water saving.

Key words: water balance, ceramic membrane, water removal system, wet plume eradication, water saving

CLC Number:

TK08

HAN Changliang, GU Xiaobing, YUAN Zonghai, LI Gang, SUN Baomin, GAO Dan. Water balance analysis for the flue gas water removing technology within ceramic membrane[J]. Huadian Technology, 2021, 43(5): 53-58.

Figures/Tables 7

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