Device for improving vacuum of thermal power generating unit

Abstract

The invention discloses a device for improving vacuum of a thermal power generating unit. The device comprises a steam turbine low-pressure cylinder which is equipped with a steam exhaust pipeline; the steam exhaust pipeline is respectively connected with a steam condensing device and an air cooling steam condenser; mixing devices are arranged in the steam exhaust pipeline and a steam distribution pipeline of the air cooling condenser; a condensed water tank and an air pumping device are connected to the lower end of the air cooling condenser; the condensed water tank is connected with a circulating condensed water collecting tank through a condensed water regulating valve; the circulating condensed water collecting box is connected with the air pumping device; the air pumping device is sequentially connected with reverse rankine cycle electric pump refrigerating system through a second cooling water regulating valve and a circulating cooling water pump in a sequence; the circulating condensed water collecting tank is connected with a reverse rankine cycle electric pump refrigerating device through a check valve, a water pump and a demineralized water regulating valve in a sequence; the circulating condensed water collecting tank is connected with the steam condensing device through a circulating water pump; the circulating cooling water pump and a first cooling water regulating valve are connected with the steam condensing device; the condensed water tank is connected with the steam condensing device through the circulating water pump.

Description

technical field [0001] The invention relates to the technical field of thermodynamic cycles, in particular to a device for increasing the vacuum of a thermal power unit. Background technique [0002] After entering the 21st century, with the rapid development of my country's economy and the acceleration of industrialization, the demand for electric energy has further expanded, and a large number of coal-fired units have been built and put into operation, alleviating the current situation of my country's power shortage; especially in the area north of the Yellow River, the original industry The foundation is relatively weak, and there are few supporting power stations. However, with the vigorous development of industry, a large number of coal-fired units have been put into operation, which exceeds the demand for industrial production and people's livelihood, resulting in a large area of ​​idle installed capacity. Running in a non-rated load state causes serious waste of econo...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a device for improving the vacuum of thermal power units, so as to overcome the problem of vacuum deterioration in the air-cooled units in the prior art when the ambient temperature is relatively high in spring, summer and autumn. At the same time, the device can effectively Reduce the coal consumption of the unit and improve the overall economic and environmental benefits of the device

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