火力发电机组水环式真空泵深度冷却改造试验研究与分析

凝汽器抽真空系统的节能改造是近年来电厂技术改造的重要项目。通过加装深度冷却装置降低水环真空泵组工作液温度来提升真空泵组抽吸量为其改造方向之一。以某安装了真空泵工作液深度冷却装置的机组为例,通过现场试验的方法确定了凝汽器真空严密性和真空泵组抽吸量对凝汽器内凝结换热系数的影响。详细计算了水环式真空泵工作液深度冷却改造项目的节能量,为今后凝汽器抽真空系统节能改造提供了重要试验数据支持。

An Experimental Study and Analysis on Deep Cooling Technical Retrofit of Water Ring Vacuum Pump for Thermal Power Generating Unit

The condenser vacuum-pumping system energy saving renovation is an important project of power plant technical upgrade in recent years. It is one of the retrofit directions to increase the suction quantity by installing a deep cooling device to reduce the working liquid temperature of the water ring vacuum pump group. Taking a unit installing a deep cooling device , for example, the relation of condenser vacuum tightness, water ring vacuum pump suction volume and condensation surface coefficient of condenser is studied by experimental method. In addition, the energy saving of water ring vacuum pump with deep cooling retrofit is calculated detailly in the paper, in order to provide important experimental data support for energy saving technical retrofit of condenser vacuum system in the future.