SCR脱硝系统喷氨优化调整试验研究

摘要/Abstract

摘要：

为了提高脱硝性能、减少氨逃逸率、降低空预器堵塞风险，并满足环保要求的低排放标准，对某电厂2×330MW燃煤机组SCR脱硝系统进行喷氨优化调整试验研究。优化后 #1、 #2机组SCR脱硝系统出口NOx质量浓度分布偏差分别下降了29.6%和45.2%；氨逃逸质量浓度平均下降0.418mg/m3和1.786mg/m3。通过调整喷氨手动阀门开度，合理调节SCR装置的喷氨量，使SCR脱硝系统出口NOx质量浓度分布的均匀性得到明显改进，从而消除了局部氨逃逸峰值，并降低了氨逃逸率。

关键词:

">">SCR脱硝系统, 喷氨优化, NO">">x">质量浓度, 氨逃逸质量浓度, 阀门开度

Abstract:

In order to improve the performance of denitration, reduce ammonia escape rate, reduce the risk of air preheater blockage and meet the environmental requirements of low emission standards, the optimization experiments on ammonia spraying for SCR denitrification system of a 2×330MW coalfired power plant are studied.The distribution deviations of NOx concentration at the SCR denitrification system outlets of #1 and #2 units decreased 29.6% and 45.2% respectively after the optimization. The mass concentrations of ammonia slip were declined by 0.418mg/m3 and 1.786mg/m3 on average. The amounts of ammonia by the SCR device were regulated by adjusting the opening of ammonia injection valve, which improves the distribution uniformity of NOx mass concentration at the outlet of SCR denitrification system significantly, eliminates the peak of localized peak of ammonia slip and reducing the ammonia slip rate.

Key words:

SCR denitrification system, spraying ammonia optimization, NOx mass concentration, mass concentration of ammonia slip, valve opening

方明成，刘玉强，王润明，周明. SCR脱硝系统喷氨优化调整试验研究[J]. 华电技术, 2018, 40(9): 61-65.

FANG Mingcheng, LIU Yuqiang, WANG Runming, ZHOU Ming.

Research on ammonia spraying optimization in SCR denitrification system

[J]. Huadian Technology, 2018, 40(9): 61-65.

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