火电机组凝汽器抽真空系统节能改造

Energy Saving Retrofit for Condenser Vacuum Systems of Thermal Power Units

结合3台机组的凝汽器抽真空系统节能改造实例,对比了采用蒸汽喷射抽真空系统和罗茨-水环真空泵组2种方案。通过试验分析了冷端性能提升和整体节能效益,归纳出根据机组容量和真空严密性进行改造方案选择的方法:加装罗茨-水环真空泵组适用于真空严密性好的机组;采用蒸汽喷射抽真空系统适用于机组容量大和真空严密性差的机组。

To retrofit the condenser vacuum system of three thermal power units for energy saving purpose,following two schemes were compared,one is to adopt steam injection pump,the other is to install Roots-water ring vacuum pump set.Experimental results show that considering the cold end performance and overall energy saving effects,the scheme to adopt Roots-water ring pump set is suitable for units with high requirement on vacuum tightness,while that using steam injection pump is applicable for units of large capacity with low requirement on vacuum tightness.