The Strategy on Reduction of SCR Minimum Operation Load

doi:10.11930/j.issn.1004-9649.2014.9.153.2

Abstract

Abstract: Generally, the gas temperature at the outlet of boiler economizer cannot meet the operation requirement of the SCR denitrification device when the generator loading is low. In this paper, the flue gas bypass type or limited flow type economizer with low temperature heat exchanger is proposed to solve the problem based on the analysis of existing bypass type economizer. In this way, the stable and efficient operation of the denitrification device can be realized without lowering down the boiler efficiency in the event of low loads. Moreover, for those boilers with high gas exhaust temperature, adopting the limited flow type economizer and low temperature heat exchanger can not only effectively reduce the boiler gas exhaust temperature, but also improve the efficiency of the boiler.

Key words: power plant, flue gas denitrification, selective catalytic reduction (SCR), economizer, gas exhaust temperature

CLC Number:

TK223

YANG Qing-shan, LIAO Yong-jin. The Strategy on Reduction of SCR Minimum Operation Load[J]. Electric Power, 2014, 47(9): 153-155.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.9.153.2

https://www.electricpower.com.cn/EN/Y2014/V47/I9/153

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