中国电力 ›› 2015, Vol. 48 ›› Issue (4): 44-46.DOI: 10.11930.2015.4.44

• 火电厂烟气脱硝技术专栏 • 上一篇    下一篇

飞灰含氨量对脱硝装置氨逃逸测定的影响

王建峰,刘沛奇,尤良洲,晏敏,朱跃   

  1. 华电电力科学研究院,浙江 杭州 310030
  • 收稿日期:2015-01-15 出版日期:2015-04-25 发布日期:2015-12-03
  • 作者简介:王建峰(1985—),男,山西天镇人,工程师,工学硕士,从事火电厂环保方面的研究。E-mail: 09jfwang@gmail.com

Influence of Ammonia Concentration in Fly Ash on Ammonia Slip Detection of Denitration Equipments

WANG Jianfeng, LIU Peiqi, YOU Liangzhou, YAN Min, ZHU Yue   

  1. China Huadian Electric Research Institute, Hangzhou 310030, China
  • Received:2015-01-15 Online:2015-04-25 Published:2015-12-03

摘要: 为控制烟气中生成的硫酸氢氨对空气预热器冷段的腐蚀、降低空气预热器的堵灰风险和减少脱硝还原剂用量,脱硝设施对氨逃逸有严格规定。试验发现飞灰中氨含量对测定脱硝装置氨逃逸有明显的影响,飞灰对自由态氨和化合态氨的吸附是安装脱硝装置之后氨逃逸较低但其压降却有明显增大的主要原因,因此建议对烟气脱硝的电厂测量氨逃逸的同时增加飞灰中氨含量的测定,以协助对空气预热器阻堵与否的判断。

关键词: 烟气脱硝, NH3逃逸, 飞灰中氨含量, 空气预热器

Abstract: In order to control the corrosion on the cold section of the air preheater caused by NH4HSO4 in the flue gas, reduce the risk of ash accretion in the air preheater and lower the consumption of denitration catalyst, the specifications on ammonia slip are quite strict for the denitration equipments. The tests on ammonia slip indicate that the ammonia contents in fly ash have great impacts on ammonia slip; the NH3 and NH4+ absorption by fly ash is the main reason for the low ammonia slip but the large pressure drop of the denitration equipments. Therefore, it is suggested that power plants detect ammonia slip and the ammonia contents in fly ash at the same time to determine whether the air preheater is blocked up.

Key words: flue gas denitrification, ammonia slip, ammonia contained in fly ash, air preheater

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