给水泵汽轮机排汽方式的优化及其热经济性分析  

OPTIMIZATION OF EXHAUST STEAM MODE FROM STEAM TURBINE OF THE FEED-WATER PUMP AND ANALYSIS OF THE THERMAL ECONOMIC EFFICIENCY

作　　者：郭仲德[1] 张树芳 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《热力发电》2010年第7期53-56,共4页Thermal Power Generation

摘　　要：分析给水泵汽轮机排汽排入主凝汽器对汽轮机真空的影响,提出在凝结水泵与轴封加热器间加装小型凝汽器来回收部分给水泵汽轮机的排汽热量的改造设想。以600 MW机组为例,计算改造后机组效率的变化。计算结果表明,改造后主凝汽器蒸汽负荷减少,机组做功及效率提高,能有效地降低标准煤耗率,经济效益显著。The influence of exhausting steam from the steam turbine of feed-water pump into the main condensor upon the vacuum in main steam turbine has been analysed,and a proposal of installing a small condenser between the condensate pump and the shaft sealing heater to recover some heat of the exhaust steam from the steam turbine of feed-water pump being suggested.Taking 600 MW unit as an example,the change of economic efficiency after retrofitting has been calculated.Results of calculation show that the said retrofit can effectively reduce the standard coal consumption rate,having remarkable economic benefit.

关 键 词：给水泵 给水泵汽轮机 凝汽器真空 排汽热量 标准煤耗率 经济性 

分 类 号：TM617[电气工程—电力系统及自动化]