Combined closed cooling tower

Abstract

The invention discloses a combined closed cooling tower. The combined closed cooling tower comprises a tower body, a fan, a water collection demister, a spray pipe fitting, a dry-section heat exchangetube assembly, a wet-section heat exchange tube assembly, a revolving bed assembly and a water collection tank, wherein the fan is arranged at the top of the tower body, the dry-section heat exchangetube assembly is arranged below the fan, the water collection demister is arranged below the dry-section heat exchange tube assembly, the spray pipe fitting, the wet-section heat exchange tube assembly and the supergravity revolving bed assembly are arranged below the water collection demister, the water collection tank is arranged at the bottom of the tower body and provided with a liquid outlet, the liquid outlet of the water collection tank is connected with the spray pipe fitting through a pipeline, the top of the tower body is provided with an air outlet, and the side wall of the portion, above the water collection tank, of the tower body is provided with an air inlet. According to the cooling tower, the heat exchange efficiency of the cooling tower can be significantly improved, besides, the problem of heat exchange tube scaling caused by long-term operation can be effectively avoided, and the cooling tower also can flexibly respond to different environmental changes to avoid the generation of white mist.

Description

technical field [0001] The invention belongs to the technical field of cooling equipment, in particular to a closed cooling tower. Background technique [0002] The cooling tower is a commonly used cooling equipment. Its working principle is that the high-temperature circulating water that needs to be cooled is inside the cooling tower, and through latent heat and sensible heat exchange with the air, it transfers its own heat to the air to achieve cooling. [0003] According to whether the air is in direct contact with the cooled water, it can be divided into an open cooling tower and a closed cooling tower. In the open cooling tower, the air and water are in direct contact, and the heat exchange occurs on the contact surface, so the heat exchange effect is relatively better, and the temperature of the cooling water can exchange heat with the air to the wet bulb temperature of the air. However, due to the direct contact between the air in the open cooling tower and the cool...

AI Technical Summary

Problems solved by technology

Patent CN105987620A discloses a high-temperature closed cooling tower with a pre-cooling device. Serpentine coils are installed in the water storage tank to realize fluid pre-cooling, which avoids the instantaneous evaporation of spray water on the surface of the gas-phase coil by overheated high-temperature water, and solves the problem of It solves the problem that the outer wall of the coil is easy to scale and affects the heat transfer effect, but this method only ensures the heat transfer effect of the cooling tower, and does not improve the heat transfer efficiency

[0005] In addition, when the traditional heat and moisture exchange closed cooling tower operates in the morning and evening when the temperature is low, rainy season, winter and high humidity season, the dew point of the hot and humid air leaving the tower is significantly higher than the outside air temperature, resulting in condensation when it is discharged outside the tower. White mist is generated, which has adverse effects on the surrounding environment and working life

At present, the commonly used solution is to use a dry-wet combination closed cooling tower. In the low temperature environment, air and cooling water are used to exchange heat indirectly. In the high temperature environment, the spray water is turned on to realize heat exchange through heat and moisture exchange, such as patents CN104864741A, CN104864738A, etc., but the above Only the adjustment method of the spray water switch is single, and the atomization distribution of the spray water is mainly realized through the nozzle during spraying. The amount of spray water directly affects the atomization distribution effect of the nozzle, which in turn limits the processing capacity of the cooling tower to a certain extent. Range, cooling tower load adjustable performance is poor

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