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J4  2014, Vol. 48 Issue (1): 63-69    DOI: 10.3785/j.issn.1008-973X.2014.01.010
机械与能源工程     
联合空气分级与SNCR在300 MW锅炉上的应用
温智勇1,胡敏2,杨玉2,莫桂源2,岑可法2
1.广东电网公司电力科学研究院,广东 广州 510080;
2. 浙江大学 能源清洁利用国家重点实验室,浙江 杭州 310027
Application of air staging combined with SNCR on 300 MW boiler
WEN Zhi-yong1, HU Min2, YANG Yu2, MO Gui-yuan2, CEN Ke-fa2
1. Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China;
2.State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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摘要:

在一台300 MW燃煤锅炉上应用联合空气分级与选择性非催化还原(SNCR)技术,分析该联合脱硝技术的脱硝效果,探讨各种喷枪组合以及喷射点选择对脱硝的影响.实验结果表明,在应用联合脱硝技术后,该锅炉的NOx排放质量浓度为186 mg/m3,联合脱硝效率达到75.2%,其中SNCR系统的单独脱硝效率为46.8%.采用长短枪配合的喷射方案,将还原剂从炉膛温度为950 ℃~1 100 ℃的位置喷入,可以获得较高的脱硝效率和较低的氨逃逸量.SNCR脱硝系统的投运对飞灰碳质量分数、炉渣碳质量分数没有显著的影响,但会造成排烟温度上升3.5 ℃,锅炉效率降低约0.15%.

Abstract:

The combined air staging and selective non-catalytic reduction (SNCR) technology was applied to a 300 MW boiler. Data about the NOx emissions were obtained. The influence of different nozzle combinations and the positions of nozzles on the NOx reduction was analyzed. Experimental results showed that the NOx emission was only 186 mg/m3, the joint DeNOx efficiency was 75.2% and the own DeNOx efficiency of the SNCR system was 46.8%. Reducing agent sprayed from the long nozzles and short nozzles were applied simultaneously and the reducing agent was injected into the furnace where the temperature ranged from 950 ℃ to 1 100 ℃. A high DeNOx efficiency was obtained and the amount of NH3 slip was low. The application of SNCR system had little impact on carbon mass fraction in fly ash and slag, but the temperature of the flue gas increased by 3.5 ℃, resulting in the loss of boiler efficiency by 0.15%.

出版日期: 2014-01-01
:  TK 224.1  
基金资助:

国家“十二五”科技支撑计划资助项目(2011BAA04B01).

作者简介: 温智勇(1976-),男,高工,从事锅炉燃烧优化研究.E-mail:wzygd@163.com
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引用本文:

温智勇,胡敏,杨玉,莫桂源,岑可法. 联合空气分级与SNCR在300 MW锅炉上的应用[J]. J4, 2014, 48(1): 63-69.

WEN Zhi-yong, HU Min, YANG Yu, MO Gui-yuan, CEN Ke-fa. Application of air staging combined with SNCR on 300 MW boiler. J4, 2014, 48(1): 63-69.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.01.010        http://www.zjujournals.com/eng/CN/Y2014/V48/I1/63

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