Open type water and recirculating water combined type cooling water system

Abstract

The invention relates to an open type water and recirculating water combined type cooling water system. The system comprises an open type water system and a recirculating water system, and is characterized in that the recirculating water system comprises a front flow device and a rear flow device, and an outlet of the open type water system is connected between the front flow device and the rear flow device, so that open type water in the recirculating water system and recirculating water output by the front flow device of a condenser are converged and then flow through the rear flow device ofthe condenser. The cooling water system has the beneficial effects that the open type water which is heated by 3-5 DEG C through an open type water heat exchanger is connected into a rear water chamber or a rear water chamber connection pipe of the condenser, the open type water continues to flow through the second half condenser, the temperature continues to be increased by 4-5 DEG C, the cooling capacity of the open type water is fully utilized, and the economic benefit of operation of a unit is improved.

Description

technical field [0001] The invention relates to a combined cooling water system of open water and circulating water. Background technique [0002] The thermodynamic cycle of a common condensing power plant is the Rankine cycle, in which the feed water is heated and turned into steam, which enters the steam turbine to generate power. The exhaust steam needs to be cooled by the condenser to form condensed water, which is pressurized into feed water, and the cycle is repeated. The cooling water used to cool the exhaust steam of the steam turbine into condensed water, referred to as circulating water. The low-temperature circulating water enters the condenser, absorbs the heat of the steam exhausted by the steam turbine, and the temperature of the water rises, usually 8-10°C, and then leaves the condenser to discharge the heat to the external environment. [0003] The circulating water volume of the 600,000-kilowatt unit is about ~60,000 t / h, and the circulating water volume of...

AI Technical Summary

Problems solved by technology

The temperature rise of the open water is only about 50% of the temperature rise of the circulating water, and the cooling capacity of the open water is discharged without fully utilizing it

[0018] In addition, the circulating water system and the open water system are equipped with their own import and export isolation valves, filters and cleaning devices, and the investment is the sum of the two systems, which is relatively high.

Images