Cooling energy-saving device for cooling tower and wet cooling tower

Abstract

The cooling energy-saving device comprises a water collecting tank and an air pre-cooling device, the water collecting tank seals the inner wall of a tower cylinder, and the air pre-cooling device penetrates through the bottom of the water collecting tank. An inlet in the lower part of the air pre-cooling device is communicated with fresh air entering from the lower part of the tower drum, and an air cap for shielding water drops is arranged at an outlet in the top of the air pre-cooling device. The wet cooling tower comprises a tower drum arranged on the ground; a cooling tower filler, a splashing device and a dehydrator are arranged in the tower barrel from bottom to top, an air inlet is formed in the bottom of the tower barrel, the cooling energy-saving device is further included, and a main body of the cooling energy-saving device is located between the air inlet and the cooling tower filler. The problems that the cooling limit of the wet cooling tower is limited by the environment wet bulb temperature, the cloud water loss is large, and the operation power consumption is high are effectively solved.

Description

technical field [0001] The invention relates to a wet cooling tower. Background technique [0002] Such as figure 1 As shown, the existing wet cooling tower mainly includes a cylinder 2, which is sequentially provided with a water reservoir 6, a cooling tower filler 5, a splash device 4 and a water eliminator 3 from bottom to top; some tops also have an exhaust fan. The periphery of cylinder body 2 is supported on the ground. Reservoir 6 is on the ground (the bottom is waterproofed), and cooling tower filler 5, splashing device 4 and water eliminator 3 are all installed on a concrete support, and the concrete support is supported on the reservoir ground. For coal power units in the power system, the role of the cooling tower is to reduce the temperature of the tower water to reduce the back pressure of the steam turbine and improve the working ability of the steam. [0003] Wet cooling towers are widely used in fields that require a large number of cold sources, such as e...

AI Technical Summary

Problems solved by technology

In the wet cooling tower, the circulating water is in direct contact with the air, and the heat in the water is transferred to the air through contact heat transfer and evaporative heat dissipation. The cooling effect of the wet cooling tower is theoretically limited by the wet bulb temperature of the ambient air. The limit temperature for water to be cooled is The wet bulb temperature of the ambient air; in actual engineering, the existing wet cooling towers can usually only cool the circulating water to 3~5°C above the wet bulb temperature of the ambient air

At the same time, the loss of circulating water caused by evaporation in the wet cooling tower is an important part of the water loss of the cooling tower, and it is also the largest water consumption item of the coal-fired power unit. The water consumption of the cooling tower has caused great economic losses.

In addition, the reservoir is at the bottom of the cylinder, and the lifting height of the circulating water during the cooling process is relatively high, and the cooling tower consumes a lot of power

[0004] Due to the structure of the packing layer, the problems of the existing wet cooling towers are: the temperature of the water out of the tower cannot be lowered below the wet bulb temperature of the ambient air, the loss of cloud water is large and the power consumption of operation is high

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