电厂630 MW机组宽温脱硝催化剂设计方案研究

Research on Design Scheme of Wide Temperature Denitration Catalyst for 630 MW Unit in Taishan Power Plant

以某630 MW机组的脱硝系统为研究对象,根据其运行状况和实际烟气参数条件,结合宽温脱硝催化剂衰减规律,提出“2(宽温)+1(常规)”层脱硝催化剂的创新组合模式,实现了机组并网即可投氨到100%负荷下良好的NOx减排效果,同时避免了三层全部应用宽温催化剂,提高了改造方案的经济性。通过计算脱硝系统的最低连续运行温度(MOT),评估此运行方案的风险性。

Takes the denitration system of a 630 MW unit as the research object.According to its operation status and actual flue gas parameters,combined with the attenuation law of wide temperature denitration catalyst,an innovative combination mode of“2(wide temperature)+1(conventional)”layers of denitration catalyst is proposed,which realizes the good NOx emission reduction effect when the unit is connected to the grid,i.e.,ammonia can be put into 100%load.At the same time,the application of wide temperature catalyst in all three layers is avoided,and the economy of the transformation scheme is improved.Evaluate the risk of this operation scheme by calculating the minimum continuous operating temperature(MOT)of the denitrification system.