烟气再热器换热元件堵塞原因分析及处理

Cause analysis and treatment for components of gas-gas heater emphraxis

针对宁夏马莲台发电厂2台机组脱硫系统GGH换热元件频繁堵塞的问题,从GGH吹灰器吹扫效果、堵塞垢样成分入手进行分析,找出了造成GGH换热元件堵塞的原因,并采用增大除雾面积、更改吹灰介质的方法对吹GGH换热元件进行了改造。改造结果表明:GGH换热元件堵塞现象消除,确保了脱硫系统安全稳定运行。

Aiming at problem of the Gas-Gas Heater（GGH） components frequently emphraxis of desulfurization system in two power generation units of Ningxia Maliantai Power Plant, analyzes the blow/ ing and sweeping effect of the soot blower and the components of dirt sample, finds out the causation of the GGH heat exchanging components frequently emphraxis. By the methlds of augment demisting area and rejiggering medium of blowing ash reconstructs the GGH heat exchanging components. The reconstructing result shows that eliminates the fault of GGH heat exchanging components emphraxis, in- sures the safe and stabilization of desulfurization system.