Water-saving natural ventilation cooling tower and cooling method thereof

Abstract

The invention discloses a water-saving natural ventilation cooling tower, which comprises a tower drum with an outlet at the top, a partition wall-type heat exchanger and fans, a herringbone column and a water spraying device. The fans communicate with the partition wall-type heat exchanger, and the partition wall-type heat exchanger comprises an outer wall, a partition plate, wet and hot air passages, heat exchanger walls arranged in the wet and hot air passages and a second air passage composed of the outer wall, the partition plate and the heat exchanger walls. A water-saving method based on the water-saving natural ventilation cooling tower comprises the following steps: S1, making the outside air enter the inside of the tower drum; S2, carrying out first heat exchange to generate wetand hot air; S3, extracting the outside air and enabling the outside air to enter the second air passage to cool the heat exchange walls; S4, performing secondary heat exchange cooling on the wet andhot air and the cooled heat exchange walls, and condensing the wet and hot air to recover evaporated water. The invention solves the problems of large water consumption and large resource consumptionexisting in the prior art.

Description

technical field [0001] The invention belongs to the technical field of cooling towers, and in particular relates to a water-saving natural draft cooling tower and a cooling method thereof. Background technique [0002] Thermal power is mainly a coal-fired steam turbine power generation process. Water is heated by a boiler to become high-temperature and high-pressure steam, which enters the steam turbine to do work. After doing work, the exhausted steam must be transformed into water again to enter the boiler to form a cycle. This requires the exhaust steam to be sent to the condenser for condensation. The condensation of the exhaust steam releases a large amount of low-temperature waste heat, which is carried out by the circulating cooling water and scattered in the ambient water or the atmosphere. Only about 40% of the heat from burning coal is converted into electricity, and the rest is lost to the environment as waste heat. The temperature of the circulating cooling wate...

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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a water-saving natural ventilation cooling tower with high water-saving efficiency, reduced water consumption and resource-saving and its cooling method, which improves the water-saving efficiency and water-saving effect , which solves the problems of large water consumption and resource consumption in the prior art

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