A method for heating desalinated raw water with waste heat from cooling towers of nuclear power plants and reducing heat emission

Abstract

The invention 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, comprising the following steps: setting a heat exchange system between the cooling tower and the raw sea water, and setting two sets of heat exchange tubes in the heat exchange system; Connect the water inlet end of one group of heat exchange tubes to the water outlet end of the cooling tower, and the water outlet end is connected to the sea through the mixing tank, open drainage channel, and tidal river section; connect the water inlet end of the other group of heat exchange tubes to the The original seawater is connected, and the water outlet is connected with the seawater desalination system. The invention utilizes the waste heat from the seawater cooling tower of the nuclear power plant to increase the temperature of the original seawater in seawater desalination, thereby reducing the investment in civil engineering and equipment, reducing the energy consumption of the system operation, further utilizing the waste heat from the cooling tower, and turning waste into treasure; The temperature of the effluent water is lowered, which is beneficial to the ecological environment of the tidal river section and the discharge sea area.

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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