Study on Low Reheat Steam Temperature After Low NOx Retrofit Based on Combustion Adjustment

doi:10.12096/j.2096-4528.pgt.19084

Power Generation Technology ›› 2019, Vol. 40 ›› Issue (5): 475-480.DOI: 10.12096/j.2096-4528.pgt.19084

• Power Generation and Environmental Protection • Previous Articles Next Articles

Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment

Shenglin HU¹(),Yuan LI¹(),Rui MAO¹,Shengping ZHAN¹,Liming REN¹,Zhicheng GUO¹,Kefa CEN²

¹ Rundian Energy Science and Technology Co., Ltd., Zhengzhou 450042, Henan Province, China
² State Key Laboratory of Clean Energy Utilization(Zhejiang University), Hangzhou 310027, Zhejiang Province, China

Received:2019-05-22 Published:2019-10-30 Online:2019-11-05
Supported by:
国家自然科学基金创新研究群体项目(51621005)

Abstract

Abstract:

To solve the problem of low reheat steam temperature after low NO_x retrofit in a 330 MW coal-fired boiler, the countermeasure study was conducted based on combustion adjustment strategies. The effects of burner angle, air distribution mode, burner layer distribution, coal type of upper layer, coal fineness of upper layer, ash blowing of horizontal flue, and automatic control quality on reheat steam temperature were analyzed. The results indicate that the low reheat steam temperature mainly occurs at medium-low load (lower than 250 MW). Increasing burner angle, using inverted tower air distribution, increasing utilization rate of upper burner, improving coal calorific of upper layer, decreasing coal fineness of upper layer, strengthening ash blowing of horizontal flue and optimizing automatic control quality are conducive to improving the reheat steam temperature. The proposed combustion adjustment strategies provide important reference for the similar problem in boiler retrofit.

Key words: coal-fired boiler, low NO_x retrofit, reheat steam temperature, combustion adjustment

Shenglin HU,Yuan LI,Rui MAO,Shengping ZHAN,Liming REN,Zhicheng GUO,Kefa CEN. Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment[J]. Power Generation Technology, 2019, 40(5): 475-480.

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Study on Low Reheat Steam Temperature After Low NO_x Retrofit Based on Combustion Adjustment

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