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SCR Ammonia Injection System Troubleshooting and Adjustment for 600 MW Unit
Author(s): 
Pages: 562-565,575
Year: Issue:  6
Journal: Energy Conservation Technology

Keyword:  denitration ammonia injection gridair preheaterammoniaslip;
Abstract: 为解决某电厂660 MW机组运行中存在的雾化喷射器尿素流量超限、SCR出口两侧NOx排放不均、烟囱进口NOx偏低及A侧空预器漏风及其阻力较大、SCR进口喷氨不均等问题,在不同运行工况下,对SCR出口进行了多次NOx浓度分布测试及喷氨格栅的调节试验.试验发现,存在在线SCR出口NOx排放浓度严重失真、两侧氨空流量总阀开度很不合理、多根喷氨管完全堵塞等故障,经过检修及调整后,氨逃逸有明显下降.
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