The RB Control of Booster-Fan (with Bypass) of a 350-MW Supercritical Unit

doi:10.11930/j.issn.1004-9649.2014.10.137.4

Abstract

Abstract: The national environmental protection authority requires that the large FGD bypass shall be removed from thermal power generation projects. In the FGD system of one 350-MW supercritical unit with single booster-fan, the boiler will be forced to shut down due to the boiler main fuel trip(MFT) in the case of booster-fan trip. In order to ensure the unit long-term secure operation and reduce the number of unplanned outages, the original large FGD bypass is removed while a bypass for the booster-fan is built. At the time of booster-fan faults, the booster-fan bypass will be opened quickly and the booster-fan runback(RB) will be triggered simultaneously. Through the improvement of booster-fan control strategy and the successful RB tests at different loads, the unsafe hidden issues in boiler operation are resolved with satisfactory results.

Key words: thermal power unit, booster-fan, RB, control optimization, control strategy, flue gas pressure, bypass, FGD

CLC Number:

TK314

WANG Xiao-yong, ZHAO Zhi-dan, GUO San-hu. The RB Control of Booster-Fan (with Bypass) of a 350-MW Supercritical Unit[J]. Electric Power, 2014, 47(10): 137-141.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.10.137.4

https://www.electricpower.com.cn/EN/Y2014/V47/I10/137

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