Method of using nuclear power plant cooling tower waste heat to heat sea light raw water and reduce warm water discharge

Abstract

The invention relates to a method of using nuclear power plant cooling tower waste heat to heat sea light raw water and reduce warm water discharge. The method is characterized in that a heat exchange system is disposed between a cooling tower and raw sea water, and two heat exchange tubes are disposed in the heat exchange system; the water inlet end of one heat exchange tube is communicated with the water outlet end of the cooling tower, and the water outlet end is communicated with the sea by a mixing pool, a water discharge open channel, and a tidal reach; the water inlet end of the other heat exchange tube is communicated with the raw sea water, and the water outlet end is communicated with a sea water desalination system. The method is advantageous in that by using the discharged water waste heat of the nuclear power plant cooling tower, the sea water desalination raw sea water temperature can be increased, and therefore the civil engineering and equipment investment can be reduced, the system operation power consumption can be reduced, the cooling tower discharged water waste heat can be further used, and the waste can be turned into the wealth; and at the same time, the water outlet temperature of the cooling tower can be reduced, and the ecotope of the tidal reach and the discharge sea area can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to a method for heating desalinated raw water with waste heat from a cooling tower of a nuclear power plant and reducing temperature emission. Background technique [0002] In our country, the seawater desalination process of nuclear power plants under construction and under construction has adopted the reverse osmosis seawater desalination technology. Since the water temperature has a great influence on the water flow rate of the reverse osmosis device, that is, every time the water temperature changes by 1 °C, the inlet water pressure remains unchanged. In the case of , the water production will increase or decrease by about 2.7%. Considering that the original seawater temperature in the north is too low in winter (taking Bohai Bay as an example, it is about -1°C), some measures to increase the water temperature will be taken or circulating water drainage will be...

AI Technical Summary

Problems solved by technology

The heat source medium of the boiler room, whether it is demineralized water or softened water, should be provided by seawater desalination. Although the amount of water is very small, accounting for only 1.5% of the total water production, it will also increase the total water intake and production scale of the seawater desalination system. It will bring a certain amount of investment, and the annual operating cost will increase by about 100,000 yuan

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