Closed water cooling system being capable of producing condensed water

Abstract

The invention relates to a closed water cooling system being capable of producing condensed water, and provides the closed water cooling system for thermal power stations, which solves the closed water cooling problem under the weather conditions of high-temperature humidity and high-temperature drought. The closed water cooling system comprises a closed water cooler body which can produce the condensed water, a vacuum butterfly valve A, a vacuum butterfly valve B, a membranization water pump, a steam ejector A, a steam ejector B, an ultrafiltration industrial water replenishing pipe, an ultrafiltration industrial water replenishing control valve, a salt balance drain valve, a five-section steam extraction and admission control valve, a station auxiliary steam admission control valve, a liquid level sensor and a distributed control system (DCS); a vacuum system, a condensate system, an auxiliary steam extraction system, a heat regenerative system and the like which exist in a turboset are fully utilized, a water evaporation cooling method under high vacuum condition is adopted to solve the problem that the turboset capacity is limited due to the overhigh closed water temperature and to improve the cooling conditions of a main and auxiliary units, and the heat which is dissipated by hot closed water can be utilized to produce the condensed water; and meanwhile, the power consumption and investment of the closed water system are greatly reduced.

Description

(1) Technical field: [0001] The invention relates to a closed water cooling system capable of producing condensed water, which relates to a closed water cooling system used in a thermal power station. (two) background technology: [0002] The closed water used in thermal power plants in the prior art is demineralized water in a closed cycle. The users of the closed water used as cooling medium include the hydrogen cooler of the turbogenerator, the internal cooling water cooler of the turbogenerator, and various Sealed water coolers for various water pumps, water-air coolers for various water pump motors on the turbine side, bearing coolers, bearing coolers for main oil pumps of small machines, working sealed water coolers for vacuum pumps, cat claw coolers for steam turbines, cooling of high-pressure main steam valves Cooler, medium pressure combined steam valve cooler, blower motor water-air cooler, control oil station cooler, primary fan motor water-air cooler, lubrication...

AI Technical Summary

Problems solved by technology

[0006] In order to build large-scale thermal power plants in arid and water-scarce areas, air-cooled thermal power units (including direct air cooling and indirect air cooling) have been developed in the prior art. Air-cooled thermal power units are usually designed with a set of small wet circulating water cooling systems for safe summer. The water cooler provides open circulating water. This design not only greatly increases the infrastructure investment, but also greatly increases the water consumption of the air-cooled thermal power unit.

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