某600 MW机组汽轮机低压缸切除改造

Application of LP Cylinder Cutting Technology in a 600 MW Steam Turbine Unit

对低压缸切除改造技术在某600MW机组上的应用进行了介绍,对低压缸切除进行安全性校核后,详细介绍了连通管改造、旁路冷却蒸汽改造、汽轮机本体改造、热工控制改造等方案,并对改造后机组性能进行了分析。结果表明:机组实现了热电解耦,同时供电煤耗大幅降低,供热经济性提升。

An introduction is presented to the application of low pressure (LP) cylinder cutting technology in a 600 MW unit.After the low pressure cylinder was switched off,a safety checking was conducted on the unit,following which,retrofit schemes were discussed in detail,covering the connection pipe,cooling steam bypass system,steam turbine property,and the thermal control system,etc.Moreover,an analysis was carried out on the performance of the unit.Results show that the unit has realized thermoelectric decoupling after cutting the LP cylinder,when the coal consumption of power supply is greatly reduced and the heat supply economy is obviously improved.