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| Analysis and Solution Measures on the Wear Mechanism of SCR Catalyst in Cement Kiln |
1. Jiangxi Nanfang Cement Co., Ltd. , Nanchang Jiangxi 330038, China;2. Tianjin Cement Industry Design & Research Institute Co., Ltd. , Tianjin 300400, China
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Abstract During the operation of the SCR denitrification system in the cement kiln, the problem of rapid wear of catalyst apparent gradually. The main reasons for catalyst wear in the cement kiln SCR system include high dust content, irrational original design, uneven flow field caused by dust blockage, irrational blowing system, and poor wear resistance of the catalyst itself. Through theoretical analysis, the biggest influencing factor for catalyst wear is the flue gas flow rate, which is related to the cubic power of the flue gas flow rate. To alleviate the problem of rapid catalyst wear, it is usually solved by selecting a reasonable catalyst, increasing the resistance to wear performance of the catalyst itself, designing a reasonable reactor flow field by conducting numerical simulations, improving the catalyst service environment, and adopting a reasonable soot blowing system. This ensures the stability of the SCR system and meets the environmental requirements of ultra-low emissions.
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Received: 08 September 2022
Published: 26 May 2023
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