燃煤机组烟气脱硝系统NO_x自动调节控制分析

Coal-fired Boiler Flue Gas SCR NO_x Adjustment Control Analysis

针对燃煤机组脱硝烟气脱硝系统控制过程喷氨自动常规PID控制超调量大、系统震荡等运行中存在的问题,分析脱硝系统喷氨自动调节效果差原因,提出脱硝系统喷氨自动调节改进措施,通过实际运行参数说明,改进措施在系统仪表校验标定、快速变负荷、启停制粉系统等工况下,出口NO_x浓度均可得到很好的控制。

Aiming at prolems during the control process of SCR flue gas NOx in coal-fired boiler,this paper analyzes the causes, and introduces the improvement measures, through actual operation parameter,the measures can control the outllet NOx con eentration on the calibration of system meter,load exchange, start-stop of milling system.