Optimized operation of SCR system of 1036MW unit and deNOx efficiency diagnosis

Abstract

Abstract: Abstract:In the SCR system, the nonuniformity of the ammonia spraying and the shorter catalyst life cause the local ammonia spaying in inlet to be too much, and this leads to higher ammonia escape rate and lower deNOx efficiency. The ammonia spraying device of the SCR system of the 1036MW unit in Huaneng Haimen Power Plant was reformed. The experiment of ammonia spraying optimized adjustment for the inlet ammonia injection grid was carried out. After the optimized adjustment, the distribution uniformity of NOx in SCR system outlet was improved, and the influence of the higher local ammonia escape rate on downstream air preheater was controlled effectively. Then better result was obtained.

Key words: Keywords:selective catalytic reduction (SCR) system, catalyst, ammonia spraying, optimized adjustment, ammonia escape rate, deNOx efficiency

CHEN Weiwu 1, HU Mulin 1, CHEN Min 2 . Optimized operation of SCR system of 1036MW unit and deNOx efficiency diagnosis[J]. Huadian Technology, 2014, 36(5): 61-65.

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Optimized operation of SCR system of 1036MW unit and deNOx efficiency diagnosis

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