Current Operation State Analysis and Optimization Method Exploration on Double-Tower Double-Cycle Wet-FGD Systems

doi:10.11930/j.issn.1004-9649.2016.10.132.04

Abstract

Abstract: Optimization and retrofit is needed for the FGD systems in order to meet the requirements of ultra-low emission. As one of the solution candidates, the double-tower double-cycle wet-FGD system is analyzed through field tests and investigations, in the aspects of desulfurizing efficiency, dust removing efficiency, system resistance and operation mode. The results show that the double-tower double-cycle wet-FGD system has the characteristics of high reliability and larger operating margin. Its desulfurizing efficiency can reach above 99%. Meanwhile, its collaborative dust removing effect is superior to single tower wet-FGD systems, which makes it an ideal choice for ultra-low emission retrofits in units burning middle-sulfur and high-sulfur coal. In addition, regarding the main problems of double-tower double-cycle wet-FGD system in its design and operation process, such as redundant reserved pumps, low utilization rate of oxidation fans in the secondary absorber, fast dropping speed and fast rising speed of liquid level in primary absorber and secondary absorber, high designed system resistance and so on, the corresponding optimization and improvement measures are proposed.

Key words: coal-fired power unit, flue gas desulphurization, double-tower double-cycle wet-FGD system, collaborative dust removal, water balance

CLC Number:

TM621
X511

WEI Hongge, XU Minghua, CHAI Lei, ZHU Yue. Current Operation State Analysis and Optimization Method Exploration on Double-Tower Double-Cycle Wet-FGD Systems[J]. Electric Power, 2016, 49(10): 132-135.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.10.132.04

https://www.electricpower.com.cn/EN/Y2016/V49/I10/132

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