Power plant seawater once-through cooling system

Abstract

The invention relates to a power plant seawater once-through cooling system. The power plant seawater once-through cooling system comprises an intake canal with a water inlet, a drainage canal with a water outlet, a circulating water pump, a mixing water pump, a heat exchange device and pipelines; the intake canal, the circulating water pump, the heat exchange device and the drainage canal are sequentially connected through the pipelines to form a main cooling system body, the intake canal, the mixing water pump and the drainage canal are sequentially connected through the pipelines to form a mixing cooling system body, and a first valve is connected between the mixing water pump and the drainage canal. According to the power plant seawater once-through cooling system, the main cooling system body and the mixing cooling system body are arranged, original seawater directly transported by the mixing cooling system body and thermal discharge water output by the main cooling system body are mixed in the drainage canal, and therefore the temperature, discharged to a sea, of the thermal discharge water is reduced; the temperature, entering the sea, of the thermal discharge water can be reduced without needing to arrange a cooling tower, the thermal pollution of the thermal discharge water of a power plant is reduced, the plant area is greatly decreased, the initial investment is reduced, the energy consumption is reduced, and the economic benefit is improved.

Description

technical field [0001] The invention relates to the technical field of power plant cooling, in particular to a seawater once-through cooling system of a power plant. Background technique [0002] At present, power plants generally adopt a seawater direct-flow cooling system, that is, seawater is used as a cooling medium, and it is directly discharged after one-time cooling by heat exchange equipment. Seawater once-through cooling system has the advantages of low water intake temperature, good cooling effect, obvious energy saving and consumption reduction effect, etc., but the heat pollution of its warm water discharge is also a focus of attention. A large amount of warm water discharge aggravates the heat pollution of the marine environment, especially in summer. Especially prominent. At present, under the premise of ensuring that the back pressure of the unit operation remains unchanged, the existing technology to reduce the temperature of the cooling water discharge is t...

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Problems solved by technology

Because the factory needs to add cooling towers, the land area of ​​the factory area is greatly increased; and because the cooling medium is seawater, the cooling towers need to be made of seawater corrosion-resistant materials, and the initial investment is high; the water supply system with cooling towers requires high-lift circulating water pumps, which increases energy consumption and operating costs, increasing equipment operation and maintenance costs and workload

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