低氮改造后再热汽温偏低的燃烧调整研究

低氮改造后再热汽温偏低的燃烧调整研究

胡胜林，李源，毛睿，詹胜平，任利明，郭志成，岑可法

（1．润电能源科学技术有限公司，河南省郑州市 450042；2．能源清洁利用国家重点实验室(浙江大学)，浙江省杭州市 310027）

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

HU Shenglin, LI Yuan, MAO Rui, ZHAN Sheng-ping, REN Li-ming, GUO Zhi-cheng, CEN Ke-fa

(1．Rundian Energy Science and Technology Co., Ltd., Zhengzhou 450052, Henan Province, China; 2．State Key Laboratory of Clean Energy Utilization (Zhejiang University), Hangzhou 310027, Zhejiang Province, China)

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摘要: 针对某330 MW燃煤锅炉在进行低氮改造后出现的再热汽温偏低的问题，从锅炉燃烧调整策略角度进行对策研究，主要分析了燃烧器摆角、配风方式、燃烧器投层分布、上层入炉煤种、上层煤粉细度、水平烟道吹灰和机组自动调节品质等对再热汽温的影响。结果表明，再热汽温偏低现象主要出现在锅炉中低负荷时（250 MW以下），通过提升燃烧器仰角、倒塔式配风、增加上层燃烧器利用率、提高上层入炉煤发热量、提高上层入炉煤粉细度、加强水平烟道吹灰和优化机组自动调节品质等手段均有利于改善再热汽温偏低的问题。研究提出的燃烧调整策略对同类锅炉改造问题具有重要指导和借鉴意义。?

关键词 ：燃煤锅炉, 低氮改造, 中低负荷, 再热汽温, 燃烧调整

Abstract：To solve the problem of low reheat steam temperature after low NOx retrofit in a 330MW 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 indicated that the low reheat steam temperature mainly occurred at medium-low load (lower than 250 MW). Increasing burner angle, inverted tower air distribution, increasing utilization rate of upper burner, improving coal calorific of upper layer, increasing coal fineness of upper layer, strengthening ash blowing of horizontal flue and optimizing automatic control quality were conducive to improving the reheat steam temperature. The proposed combustion adjustment strategies provide important guidance and reference for the similar problem in boiler retrofit.

Key words： coal-fired boiler low NOx retrofit medium-low load reheat steam temperature combustion adjustment

基金资助:国家自然科学基金创新研究群体项目(No.51621005)

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	胡胜林
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	郭志成
	岑可法

引用本文:

胡胜林, 李源, 毛睿, 詹胜平, 任利明, 郭志成, 岑可法. 低氮改造后再热汽温偏低的燃烧调整研究[J]. 发电技术, .
HU Shenglin, LI Yuan, MAO Rui, ZHAN Sheng-ping, REN Li-ming, GUO Zhi-cheng, CEN Ke-fa. Study on Low Reheat Steam Temperature after Low NOx Retrofit Based on Combustion Adjustment. Power Generation Technology, 0, (): 1-.

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http://www.pgtjournal.com/CN/ 或 http://www.pgtjournal.com/CN/Y0/V/I/1

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