Power plant condenser vacuum maintaining unit provided with water chilling unit

Abstract

The invention discloses a power plant condenser vacuum maintenance unit equipped with a chiller, which includes a vacuum pump set and a chiller; the chiller includes a compressor, the inlet of the compressor is connected with the refrigerant outlet of the evaporator, and the compressor The outlet of the condenser is connected to the refrigerant inlet of the condenser; the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator through a filter and an expansion valve in turn; the compressor is controlled by a pressure controller; the evaporator The chilled water inlet is connected with a water pump; the device of the invention has the advantages of stable vacuum unit efficiency, high vacuum degree, energy saving and high efficiency, high oil separation efficiency of the chiller, high heat transfer efficiency and safe and stable automatic control operation.

Description

technical field [0001] The invention is an air-cooled Roots screw vacuum unit added with a chiller, and belongs to the technical field of vacuum pump equipment. Background technique [0002] At present, the condensers and vacuum systems of domestic thermal power plants generally have problems such as low vacuum and poor tightness, which seriously affect the economic operation of the unit, resulting in insufficient output of the unit, increased plant power consumption rate, and increased coal consumption rate for power supply. [0003] The original condenser vacuum maintains the cooler at the outlet of the air-cooled Roots pump in the unit. The open-type circulating water of the power plant is used as the cooling water. The temperature of the cooling water is greatly affected by the environment. The cooling effect of the rotor of the Roots pump is reduced, the efficiency of the Roots pump is reduced, and the degree of vacuum is reduced. Contents of the invention [0004] T...

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Problems solved by technology

[0002] At present, the condensers and vacuum systems of thermal power plants in China generally have problems such as low vacuum and poor tightness, which seriously affect the economic operation of the unit, resulting in insufficient output of the unit, increased plant power consumption rate, and increased coal consumption rate for power supply.

[0003] The original condenser vacuum maintains the cooler at the outlet of the air-cooled Roots pump in the unit. The open-type circulating water of the power plant is used as the cooling water. The temperature of the cooling water is greatly affected by the environment. The cooling effect of the rotor of the Roots pump is reduced, the efficiency of the Roots pump is reduced, and the vacuum degree is reduced

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