首钢迁钢公司2伊50 MW燃气—蒸汽联合循环（CCPP）发电工程结合国内机组运行情况，对燃气—蒸汽联合循环发电机组系统做了以下改进：蒸汽系统增加蒸汽旁路，凝汽器设置为带旁路的凝汽器；余热锅炉给水泵采用高低压双输出给水泵技术。解决了机组在启停机时蒸汽放散的问题，同时回收了除盐水，降低了给水泵的电耗，年增加净利润94万元。%The 2×50 MW gas-steam combined cycle power project of Shougang Qianan Steel made the following improvements on the CCPP system based on the actual operation conditions of domestic CCPP units: adding a steam bypass in the steam system, the con-denser to be set up with a bypass and adopting high and low pressure dual output technolo-gy in the HRSG feed water pump. This upgrading modification has solved the problem of steam bleeding at unit startup and shutdown, at the same time recovered desalted water and reduced the power consumption of the water pump, which increased net profit by 940,000 yuan annually.
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