分段式烟气冷却器的设计与应用

Design and Application of Sectional Flue Gas Coolers

针对燃煤锅炉排烟温度高的问题,设计出分段式烟气冷却器方案,并以某电厂630 MW机组增加烟气冷却器改造为例,采用了低温段烟气冷却器控制排烟温度、高温段烟气冷却器控制电除尘器入口烟温的控制策略。结果表明:改造后能有效控制排烟温度、提高锅炉热效率,对同类型机组的改造具有借鉴意义。

To solve the problem of high exhaust gas temperature of a coal-fired boiler,a new scheme of sectional type flue gas cooler was designed.Taking the retrofit on a 630 MW power unit by adding flue gas cooler as an example,where the exhaust gas temperature was controlled by the section of low-temperature flue gas cooler,and the inlet temperature of electrostatic precipitator was controlled by the section of high-temperature flue gas cooler.Results show that after retrofit,the exhaust gas temperature could be controlled effectively,while the boiler efficiency be improved,which therefore may serve as a reference for retrofit of similar power units.