罗茨-水环真空泵在火电厂应用的节能效果分析

Energy Conservation Analysis of Roots-Water Ring Vacuum Pump Applied to Thermal Power Plant

为节约火电厂厂用电耗,基于660 MW汽轮发电机组,采用罗茨-水环真空泵替换原有水环真空泵,分析不同凝汽器真空严密性条件下两种真空泵的运行功率及对机组经济性的影响。结果表明:罗茨-水环真空泵可有效降低抽真空系统能耗,在真空严密性较好时,能降低原真空泵能耗的66.5%,但当真空严密性变差时,节能效果减弱甚至不节能。

In order to save the power consumption of the thermal power plant,based on the 660 MW steam turbine generator set,the original water ring vacuum pump was replaced by a Roots-water ring vacuum pump.The operating power of the two vacuum pumps and economic impact to steam turbine generator set was analyzed under different vacuum tightness conditions of the condenser.The results showed that the Roots-water ring vacuum pump can effectively reduce the energy consumption.When the vacuum tightness is good,it can reduce the energy consumption of the original vacuum pump by 66.5%.However,when the vacuum tightness deteriorates,the energy saving effect is weakened or even does not exist.