脱硝装置入口NO_x质量浓度控制策略

Mass concentration control strategy of NO_x at the inlet of denitration device

针对火电机组"近零排放"要求,通过变氧量试验、分离燃尽风(SOFA)风门开度试验以及煤种试验,掌握了影响脱硝装置入口NO_x质量浓度的因素,提出了修改氧量控制函数、优化SOFA风门开度、合理搭配煤种等措施,可为同类机组的运行调整提供参考。

For the near zero emission requirement of thermal power units,this paper acquired the influence factors of mass concentration of NO_x at the inlet of denitration device through the variable oxygen volume test,the throttle opening test of separated overfire air( SOFA) and the coal type test. After that,some measures of modifying the oxygen control function,optimizing the throttle opening of SOFA and collocating the coal types reasonably,etc. were proposed,which provided a reference for the operation adjustment of similar units.