火电厂脱硝用尿素水解中试试验

doi:10.16085/j.issn.1000-6613.2016.s1.054

化工进展 ›› 2016, Vol. 35 ›› Issue (S1): 332-336.DOI: 10.16085/j.issn.1000-6613.2016.s1.054

• 应用技术 • 上一篇

火电厂脱硝用尿素水解中试试验

向小凤, 张向宇, 张波, 高宁, 陆续, 徐宏杰

西安热工研究院有限公司电站锅炉煤清洁燃烧国家工程研究中心, 陕西西安 710032

收稿日期:2015-08-14 修回日期:2015-11-04 出版日期:2016-06-30 发布日期:2016-07-08
通讯作者: 向小凤(1980-),女,博士。E-mail xiangxiaofeng@tpri.com.cn。
基金资助:
国家自然科学基金(51301130,51301131)及中国华能集团公司科学技术项目(TPRI-ZA-15-HKR02)。

Pilot experimental study of urea hydrolysis for deNO_x in coal plant

XIANG Xiaofeng, ZHANG Xiangyu, ZHANG Bo, GAO Ning, LU Xu, XU Hongjie

National Engineering Research Center of Clean Coal Combustion, Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710032, Shaanxi, China

Received:2015-08-14 Revised:2015-11-04 Online:2016-06-30 Published:2016-07-08

摘要/Abstract

摘要： 为降低火电厂NO_x排放造成的环境污染,采用尿素水解法制备烟气脱硝还原剂,在自主研发尿素水解反应器和尿素水解制氨工艺的基础上,搭建产氨量10kg/h规模的尿素水解中试试验台。结果表明,尿素水解反应速率是由温度控制的单调递增函数,蒸汽耗量随反应压力的增加而增加,当反应压力大于0.6MPa时加剧,装置经济性降低。提高进料浓度可减少过量水吸热造成的能量损失,有益于降低装置运行成本。多批次测试期间,进料浓度为40%~60%,操作压力与温度为0.6MPa、160℃,装置最大产氨量为16kg/h,水解率均大于98%,产品气氨气质量分率22.6%~34%(体积分率28.5%~48%),装置性能良好。

关键词: 脱硝还原剂, 尿素水解, 氨气, 中试试验

Abstract: Based on the domestically developed urea hydrolysis reactor and urea hydrolysis ammonia process, a pilot test of urea hydrolysis with 10kg/h ammonia production for the flue gas denitration reductant was established, to reduce pollution of NO_x emission from coal plant.The results showed that urea hydrolysis reaction rate was controlled by the temperature monotonically.Steam consumption increases with the increase of pressure, intensifies when pressure is greater than 0.6MPa and brings about lower economy.The higher feed concentration, the lower energy loss for the water latent heat of vaporization, and the lower operation cost of device.The maximum ammonia production is 16kg/h, the hydrolysis rate is greater than 98%, and the ammonia mass fraction of product gas is 22.6%~34%(volume fraction of 28.5%~48%) during the tests, at the feed concentration of 40%~60%, and the operate pressure and temperature of 0.6MPa and 160℃.

Key words: denitration reductant, urea hydrolysis, ammonia, pilot test

中图分类号:

TQ031

向小凤, 张向宇, 张波, 高宁, 陆续, 徐宏杰. 火电厂脱硝用尿素水解中试试验[J]. 化工进展, 2016, 35(S1): 332-336.

XIANG Xiaofeng, ZHANG Xiangyu, ZHANG Bo, GAO Ning, LU Xu, XU Hongjie. Pilot experimental study of urea hydrolysis for deNO_x in coal plant[J]. Chemical Industry and Engineering Progree, 2016, 35(S1): 332-336.

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火电厂脱硝用尿素水解中试试验

Pilot experimental study of urea hydrolysis for deNO_x in coal plant

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火电厂脱硝用尿素水解中试试验

Pilot experimental study of urea hydrolysis for deNOx in coal plant

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Pilot experimental study of urea hydrolysis for deNO_x in coal plant