基于零改造的全负荷脱硝投入应用实践

Full Load Operation Practice of a Denitration Unit with Zero Retrofit on the Equipment

针对火电机组启动期间脱硝设备无法投入的问题,某电厂1 036 MW机组选择了提高烟气温度适应催化剂的技术路线,通过优化机组启动的控制策略,在未进行设备改造时采用常规高温催化剂的情况下,采用提高汽轮机本体及再热器系统初始温度、再热器烟气挡板偏向再热器侧运行、确保炉水循环泵的正常运行时间接提高给水温度等措施,顺利实现了全负荷脱硝运行,对同类型电厂具有借鉴意义。

To solve the problem that the denitration unit can＇t be put into use during start-up period of a1 036 MW coal-fired power unit,a series of countermeasures were put forward and taken,such as raising the flue gas temperature to satisfy the requirement of related catalyst,optimizing the start-stop control strategy,improving the initial temperature of both the turbine proper and the reheater system with the use of conventional high-temperature catalyst before equipment retrofit,keeping the flue gas baffle on the reheater side,indirectly improving the feed water temperature under the premise securing the normal operation of the boiler water circulation system,etc.,and finally full load operation of the denitration unit was successfully realized,which may serve as a reference for same type of power plants.