石灰石—石膏湿法烟气脱硫装置优化改造

Optimization Reform of Limestone-gypsum Wet Flue Gas Desulfurization Device

某火电厂2×300 MW机组烟气脱硫装置各子系统设计冗余、繁杂,运行能耗偏高,设备维护成本高;系统工质腐蚀性、磨损性极强,频发泄漏现象,既影响设备投运率,又造成环境污染。为此,充分利用主机附属系统、设备资源对工艺水、滤液水等子系统进行优化改造;采取喷淋区内、外壁加强处理、脱硫系统室外管道加装暖通伴热系统改造等措施,解决吸收塔喷淋区频发冲蚀穿孔及冻结等问题改造后,在相同工况下,机组脱硫单耗下降6 kWh/t,并节约石灰石耗量3500t/a,同时降低了设备维护费用,效益显著。

2×300 MW flue gas desulfurization unit subsystem design in some thermal power plants was redundancy and complex, with high energy consumption, high maintenance costs. Systems engineering qualitative highly corrosive wear, frequent leaks, it would affect equipment operation rate, and cause environmental pollution. Therefore, to make full use of the host affiliated system equipment resources to optimize the transformation of process water, filtrate water subsystem. Took effective measures to solve the absorber spray zone perforation and erosion-prone antifreeze and other issues. Reduced energy consumption to ensure the desulfurization efficiency and higher operation rate, at the same time, reduced maintenance cost. After reformation, in the same unit working conditions, the desulfurization consumption dropped 6 kWh/t, limestone consumption-saving 3500 t, reducing equipment maintenance costs of about 800 000 yuan.