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| CFB锅炉SNCR脱硝工艺系统及其常见问题分析 | |
| 引用本文： | 武世福,苏铁熊,张培华,赵耀芳. CFB锅炉SNCR脱硝工艺系统及其常见问题分析[J]. 黑龙江电力, 2014, 36(6): 550-553 |
| 作者姓名： | 武世福 苏铁熊 张培华 赵耀芳 |
| 作者单位： | 1. 中北大学机械与动力工程学院,太原,030051 2. 中北大学朔州校区,山西朔州,036000 3. 山西平朔煤矸石发电有限责任公司,山西朔州,066003 |
| 摘 要： | 针对CFB锅炉采用选择性非催化还原（SNCR）技术进行脱硝过程中存在未反应的还原剂对空气预热器的腐蚀问题,阐述了CFB锅炉NOx排放的主要影响因素,计算了SNCR脱硝系统使用不同还原剂的经济性,分析了烟气酸露点及逃逸氨生成的NH4HSO4对空气预热器的影响,得到了最佳排烟温度及SNCR脱硝系统还原剂合理用量的选择依据.实践证明,山西某电厂300MW CFB锅炉脱硝改造后,通过控制合适的氨氮比,可使系统脱硝效率提高,氨逃逸量对空气预热器的影响最小. |
| 关 键 词： | CFB锅炉 SNCR脱硝 经济性 氨逃逸空气预热器 |
CFB boiler SNCR denitrification system and analysis of common problems |
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| WU Shifu,SU Tiexiong,ZHANG Peihua,ZHAO Yaofang. CFB boiler SNCR denitrification system and analysis of common problems[J]. Heilongjiang Electric Power, 2014, 36(6): 550-553 | |
| Authors: | WU Shifu SU Tiexiong ZHANG Peihua ZHAO Yaofang |
| Affiliation: | WU Shifu, SU Tiexiong, ZHANG Peihua, ZHAO Yaofang (1. School of Mechanical and Power Engineering, North China University, Taiyuan 030051, China; 2. North China University, Shuozhou 036000, China; 3. Shanxi Pingshuo Gangue Power Generation Company Limited, Shuozhou 066003, China) |
| Abstract: | The reducer irreacted will corrupt the air preheater during the process of denitrification by SNCR for CFB boiler. Aiming at the problem, this paper expounds the factors influencing the emission of NOx in CFB boiler, cal- culates the economy of SNCR denitrification system using different reducers, and finds the optimal temperature of smoke exhaust and the evidence on how to select reasonable quantity of reducer for SNCR denitrification system by analyzing the influence of the flue gas acid dew point and NH4 HSO4 generated by ammonia escape on air preheater. The practice proves that the 300 MW CFB boiler after denitrification reformation in a power plant in Shanxi is able to enhance system denitrification efficiency and lower the influence of ammonia escape quantity on air preheater by controlling appropriate N/H ratio. |
| Keywords: | CFB boiler SNCR denitrification economy atmnonia- escape air preheater |
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