A device for increasing the vacuum of a thermal power unit

Abstract

The invention discloses a device for improving the vacuum of a thermal power unit, comprising a steam turbine low-pressure cylinder, the steam turbine low-pressure cylinder is provided with an exhaust pipe, the exhaust pipe is respectively connected with a steam condensing device and an air-cooled condenser, and the exhaust pipe is connected with the air-cooled condenser There is a mixing device in the steam distribution pipe of the air-cooled condenser. The lower end of the air-cooled condenser is connected to a condensate tank and an air extraction device. The condensate tank is connected to a circulating condensate header through a condensate regulating valve. The air extraction device is connected to the reverse Rankine cycle electric pump refrigeration system through the cooling water regulating valve 2 and the circulating cooling water pump in turn. The circulating electric pump refrigeration device is connected, the circulating condensate collection tank is connected with the steam condensing device through the circulating water pump, the circulating cooling water pump and the cooling water regulating valve are connected with the steam condensing device, and 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 economy...

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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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