600MW直接空冷机组给水泵汽轮机高低压调汽门重叠度调整后安全性及经济性分析

通过对给水泵汽轮机参数设计、运行工况的对比分析,对实际运行中高低压调汽门重叠度偏大、高压调汽门高负荷时部分开启、节流损失较大、高压调汽门冲刷严重、高压抽汽排挤低压抽汽等经济性降低问题进行了分析研究,提出了减小给水泵汽轮机高低压调汽门重叠度的措施,提高了机组运行的安全性和经济性。

The Safety and Economy Analysis on 600 MW Direct Air Cooling Units after the Adjustment of Overlap Degree of High/Low Pressure Adjustment Valve of Feed Pump Turbine

Through the comparative analysis on the parameter design and operation condition of feed pump turbine, this paper analyzes and studies the reduction of economy caused by the higher overlap degree of high/low pressure adjustment valve in actual operation, the partly open of high-pressure adjustment valve under higher load, bigger throttle loss, serious washout of high -pressure adjustment valve, and crowding out of high -pressure steam turbine for low -pressure steam extraction, etc., and puts forward the me...