Pilot test on low temperature NH3-SCR denitration of coal-fired flue gas

被引：0
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作者：
Guo, Lin [1 ]
Ren, Jinghang [1 ]
Zhao, Yonggang [1 ]
Kong, Wei [3 ]
Dong, Lin [2 ]
Cao, Peng [1 ]
机构：
[1] Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi,Xinjiang,832000, China
[2] Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing,Jiangsu,210000, China
[3] Tianfu South Thermoelectric Co., Ltd., Shihezi,Xinjiang,832000, China
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2020年 / 39卷 / 04期
关键词：
The researches on low temperature denitrification catalysts in China are mainly focused on laboratory scale test. On the other hand; the researches on the denitrification activity and poisoning mechanism of non-vanadium low-temperature NH3-SCR (selective catalytic reduction) honeycomb catalyst under coal-fired flue gas conditions were insufficient; and the experiments with simulated flue gas cannot fully reflect the performance of the catalyst under real flue gas. A self-designed low-temperature NH3-SCR device was used in the pilot test at a thermal power plant in Shihezi. The optimal process conditions of the catalyst under actual flue gas were obtained; and the influence mechanism of complex components on the catalyst was analyzed in-depth. The results showed that the catalyst had the best denitration efficiency when the SO2 concentration was below 35mg/m3; the space velocity was about 4200h-1; the flue gas temperature was about 100℃ and the ammonia nitrogen ratio was about 1.2. High concentration of SO2 will promote the formation of sulfates and the sulfation of the active components in the catalyst. The low-temperature denitration process and catalyst have broad industrial application prospects because the process is easy to modify and the low-temperature denitration catalyst is environment-friendly and shows excellent denitration performance and sulfur resistance. © 2020; Chemical Industry Press. All right reserved;
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页码：1371 / 1377
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