| 锅炉SCR烟气脱硝空气预热器堵塞原因及其解决措施 |
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| 引用本文： | 钟礼金,宋玉宝.锅炉SCR烟气脱硝空气预热器堵塞原因及其解决措施[J].热力发电,2012,41(8):45-47,50. |
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| 作者姓名： | 钟礼金 宋玉宝 |
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| 作者单位： | 1. 粤电珠海发电厂,广东珠海,519050
2. 苏州华瑞能泰发电技术有限公司,江苏苏州,215011 |
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| 摘 要： | 分析锅炉进行SCR烟气脱硝时空气预热器冷段元件硫酸氢氨堵塞的原因,认为其主要因SCR装置过量喷氨或局部过量喷氨造成大量氨逃逸所致.对此,提出对于运行效果较差的空气预热器,可结合降低排烟温度或者漏风率进行其换热元件的综合改造等措施.同时,建议空气预热器冷段换热元件在煤中硫含量较低以及出口综合温度较高时采用高性能的考登钢材质.
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| 关 键 词： | 烟气脱硝 空气预热器 氨逃逸 硫酸氢氨 堵塞 |
AIR PREHEATER BLOCKING IN BOILER WITH SCR DENITRIFICATION DEVICE:REASON ANALYSIS AND SOLUTIONS |
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| ZHONG Lijin
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SONG Yubao.AIR PREHEATER BLOCKING IN BOILER WITH SCR DENITRIFICATION DEVICE:REASON ANALYSIS AND SOLUTIONS[J].Thermal Power Generation,2012,41(8):45-47,50. |
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| Authors: | ZHONG Lijin SONG Yubao |
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| Affiliation: | 1.Zhuhai Power Station of Guangdong Yudean Group Co.,Ltd.,Zhuhai 519050,Guangdong Province,China 2.Suzhou TPRI Enter-Tech Co.,Ltd.,Suzhou 215011,Jiangsu Province,China |
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| Abstract: | Heat transfer elements of preheater on boiler with SCR denitrification equipment were blocked by ammonium bisulfate(ABS).Large amount of ammonia escaping caused by excessive ammonia injection in SCR equipment or it’s local area was considered as the main reason.Thus,comprehensive retrofit for heat transfer elements of preheater with bad operation effect should be conducted,combining with decreasing the exhaust gas temperature or air leakage rate.Meanwhile,the heat transfer element for cold segment of air preheater should be made of Corten steel,for the low sulfur content coal,or high outlet integrated temperature. |
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| Keywords: | flue gas denitrification air preheater ammonia escape ammonium bisulfate block |
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