Cross flow closed

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Cross flow closed

Circulating cooling device that avoids direct contact between process circulating water and air and causing water pollution.

The basic operating principle of a cross-flow closed cooling tower is as follows:
The circulatory system is divided into
Internal circulation system: The cooling medium enters the closed cooling tower through the heat exchange of the process equipment, and sends the heat to the outside through the coil heat exchanger. The cooled process medium is pumped to the process equipment by the system circulating water for recycling.
External circulating water system: the closed tower is equipped with a spray water collection tank, and the spray pump sucks water from the water collection tank in the lower part of the tower to the open water distribution tank at the upper part, and sprays the surface of the PVC filler evenly through the nozzle to form a uniform water film on the surface of the filler, fan The introduced dry air passes through the packing layer laterally and exchanges heat with the water film on the surface of the packing, so that the temperature of the spray water is reduced. After passing through the packing layer, the spray water of lower temperature is scattered on the surface of the coil, and the heat of the cooling medium in the coil The water film transferred to the outside of the pipe through the pipe wall, part of the water evaporates and takes out heat, which is discharged out of the tower under the action of a fan. The evaporated spray water falls into the lower water tank and is reused again. At the same time, the spray water consumed by evaporation needs to be supplemented.
The closed tower fan continuously introduces dry air from the outside of the tower, absorbs the heat discharged from the evaporation of water and discharges it out of the tower, ensuring a good cooling effect.
The inner circulating cooling medium exchanges heat through the heat exchanger tube (coil), avoiding the direct contact between the outer circulating water and the air and causing water pollution.


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