Adverse current type hermetic cooling water tower

Abstract

The invention discloses a counter-flow type closed cooling tower which comprises an inlet end shunt main pipe, a heat and mass transfer unit, a heat transfer unit, a spray pond, a blow-down valve, an air supply device, a shell, a spraying device, a spray water outlet pipe, an outflow end confluence main pipe, a spray water inlet pipe, a spray pump. The heat exchange coils of the cooling tower are divided into the heat transfer medium unit and the heat transfer unit. Plastic pipes are used for substituting for metallic pipes or padding for mass and heat transfer of spray water and air. Only metallic pipes are distributed in the heat transfer unit for heat exchange of the spray water from the heat and mass transfer unit and the liquid to be cooled. The system is more compact than the traditional closed cooling tower, and the manufacturing cost is reduced through the distribution mode under the condition of the same heat dissipating capacity.

Description

technical field [0001] The invention relates to a cooling tower in the technical field of refrigeration, in particular to a counter-flow closed cooling water tower. Background technique [0002] Compared with the open cooling water tower, the cooling water of the closed cooling water tower is not in contact with the air, and the dust in the air cannot enter the cooling water loop of the system, so the cooling water is relatively clean and there will be no fouling in the heat exchange tube. For wet closed cooling water towers, fillers are usually arranged in the tower to realize spray water and air heat and mass transfer, and metal pipes are arranged in the tower as both heat exchange pipes for the cooled fluid and spray water as well as spray water Heat and mass transfer tubes between air and air. For wet cooling towers with fillers, the spray water is in direct contact with the air during long-term operation, and the water quality of the spray water deteriorates, so it is ...

AI Technical Summary

Problems solved by technology

However, since the porous moisture-absorbing material covers part of the area of ​​the metal pipe, the heat exchange area between the metal pipe and the spray water is reduced, so the number of metal pipes arranged in the cooling water tower increases, and the manufacturing cost also increases

In addition, the adsorbed water in the pores of porous materials is generally the adsorbed water in the outermost layer of the pores evaporates first, and some water is still adsorbed in the pores during the evaporation process. It is equivalent to adding a thermal resistance formed by the adsorbed water in the pores, which is not conducive to the heat transfer process of the cooling water tower

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