汽轮机疏水系统优化节能改造

Energy Saving Transformation of Draining System of Steam Turbines

随着煤炭价格的上涨,火力发电企业对节能工作越来越重视,汽轮机疏水系统阀门较多,阀门前后压差较大,机组启停时疏水冲刷易造成阀门泄漏,汽轮机疏水系统内漏是较为普遍的现象。通过分析每一道疏水阀门的作用,取消多余的疏水管道;将压力等级相同的疏水管道合并成一路,以有效减小泄漏量,文中通过330 MW汽轮机疏水系统优化的实例,论述了疏水系统优化对经济性的影响,可供同类型电厂参考。

With the increasing coal price, in coal-fired power plants, more and more attention is currently put on energy saving. Due to the high pressure difference across the valves of draining system, leakage accidents induced by high-speed flushing during the shut-down and restart processes were frequently encountered. Through analyzing the function of each valve, solution measures, such as removing redundant valves and merging pipes transporting waters with similar pressures into one single pipe, were adopted to reduce leakage. Taking the draining system of one 330 MW steam turbine as an example, the influence of draining system on economy was analyzed. The results can provide valuable reference for other similar power units.