The Reheat Steam Temperature Control Strategy for the 1 000 MW Ultra-Supercritical Double-Reheat Unit and Its Application

doi:10.11930/j.issn.1004-9649.201703066

Abstract

Abstract: Through the analysis on the effects of the temperature control methods on the reheat steam temperature, a reheat steam temperature control strategy for the 1 000 MW double-reheat ultra-supercritical unit is proposed and illustrated from the aspects of the boiler heating surface arrangement, the swinging burner nozzle, the flue gas damper, the micro water spray desuperheaters and emergency water spray desuperheaters for both the primary and the secondary reheaters. Then the structure of the primary and the secondary reheater steam temperature control circuits of a 1 000 MW unit is presented with the superheat and reheat steam temperature decoupling method also being introduced. The practical operation has proved that this control strategy has good application effects.

Key words: ultra-supercritical unit, double-reheat cycle, reheat steam temperature control

CLC Number:

TK323

NIU Haiming, QIU Zhongchang, HUANG Huanpao. The Reheat Steam Temperature Control Strategy for the 1 000 MW Ultra-Supercritical Double-Reheat Unit and Its Application[J]. Electric Power, 2017, 50(9): 138-142.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201703066

https://www.electricpower.com.cn/EN/Y2017/V50/I9/138

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