Water-saving closed type cooling tower

Abstract

The invention provides a water-saving closed type cooling tower mainly comprising a blower, water collecting devices, nozzles, a spraying pump, air cooling pipe groups, shutters, an air-inlet grille and a lower-part water collecting tank, wherein the two air cooling pipe groups with heat exchanging pipes as finned pipes are obliquely arranged below the nozzles positioned at both sides inside a tower body; one side of each air cooling pipe group is provided with the shutters, and the other side of the same is provided with the water collecting device. Compared with a conventional closed type cooling tower, the water-saving closed type cooling tower only depends on the air cooling of the finned pipes to achieve the purpose of cooling without spraying water in a cold season with the air temperature lower than 10 DEG C so that water loss is zero in the cold season, only needs to spray the water on a part of the finned pipes when the air temperature is higher than 10 DEG C, and gradually increases spraying water quantity following the increase of the air temperature, thereby saving 60-80 percent of the spraying water compared with the conventional closed type cooling tower.

Description

technical field [0001] The invention relates to a closed cooling tower used for circulating cooling water and various low-temperature section process media, in particular to a water-saving closed cooling tower, which belongs to the technical field of refrigeration devices. Background technique [0002] Existing cooling towers include open cooling towers and closed cooling towers, wherein closed cooling towers include bases, auxiliary parts and main cooling systems, auxiliary parts include soft water pipelines, soft water replenishment devices, and main cooling systems include shells. body, a plurality of fans arranged on the top of the shell, a water eliminator arranged directly below the fans, a sprinkler water distribution system arranged under the water eliminator, and a sprinkler water distribution system arranged at the bottom of the shell and used to provide spray water for the spray water distribution system. The water collecting tank for showering, the cooling coil a...

AI Technical Summary

Problems solved by technology

As far as the existing technology is concerned, there are three common solutions for the cooling and condensation of the circulating cooling water in the low temperature section and the process medium, especially when the outlet temperature of the process medium is required to be cooled to close to the ambient wet bulb temperature: the first is ordinary dry Add a section of water after the air cooler, but the equipment cost is high, the floor area is large, and it is uneconomical

The second type is a wet air cooler, which sprays and evaporates outside the finned tubes to enhance heat dissipation. However, since no water film can be formed outside the finned tubes, the heat taken away by evaporation is very limited. Moreover, the nozzles are easy to block and the water mist is easy to drift away.

Since this conventional closed cooling tower always sprays water outside the heat exchange coil, water evaporation loss, drift loss, and sewage loss are inevitable, which will cause a large amount of spray water loss

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