Counter-flow closed-type cooling tower

Abstract

The invention discloses a counter-flow closed-type cooling tower, belongs to heat exchanging equipment, particularly relates to a closed-type cooling tower which is used for preventing fogging at an air outlet, and aims to provide a counter-flow closed-type cooling tower which, during winter operation, can alleviate or eliminate fogging at the air outlet and reduce the risk of ice formation at shutters of the air outlet, and is convenient to save water. The counter-flow closed-type cooling tower comprises a tower body (1), a blower (2), a water collector (3), a water distributing device, a first heat exchanger (5), filling (6), a water collecting groove (7), air inlet shutters (8), a second heat exchanger (9), and a main water collecting pipe (42), wherein the water distributing device comprises a plurality of water distributing pipes (41); all the water distributing pipes are distributed in the tower from the middle to two sides in parallel to one another, or are distributed in the tower from the center to the periphery; a plurality of water distributing nozzles (411) are arranged on the side wall below the water distributing pipes; each water distributing pipes is connected with the main water collecting pipe through a flow rate adjustable valve (4).

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a closed cooling tower for preventing fog formation at an air outlet. Background technique [0002] A cooling tower is a device that dissipates the waste heat generated in industrial production or refrigeration processes into the atmosphere. It can exchange heat with the air in the cooling medium (usually water) carrying waste heat, and transfer the heat of the medium. The medium is cooled by supplying air and dispersing into the atmosphere. Cooling towers are widely used in air conditioning cooling, refrigeration, plastic chemical industry and other industries. Cooling towers are generally composed of fillers (also known as heat dissipation materials), water distribution systems, ventilation equipment, air distribution devices (such as air inlet shutters, air guide devices, air ducts, etc.), water retainers (or water collectors) and water collection tanks ( or sump) etc. Existing coo...

AI Technical Summary

Problems solved by technology

The white mist has a great impact on the surrounding environment of the cooling tower, which may cause the ground near the cooling tower to freeze, causing certain safety hazards. In addition, the white mist will also dissolve ions in the air, making it acidic or alkaline and corroding nearby objects

[0004] 2. The existing cooling towers are generally designed according to the wet bulb temperature in summer. When used in winter, due to the decrease of the external environment temperature, if the cooling tower still maintains full-load operation, its actual cooling capacity exceeds the required capacity, which will cause water leakage. Massive waste of resources and energy

[0005] 3. In some colder areas, cooling towers with air inlet louvers often have ice hanging on the air inlet louvers. This is generally because they do not control the spray area of ​​the spray water, resulting in water flowing or splashing When it reaches the air intake louvers and freezes, it is easy to block the air duct

The Chinese utility model patent with the application number 201120577079.6, the authorized announcement number CN202470811U, and the authorized announcement date on October 3, 2012 discloses a water-saving and environment-friendly cooling tower, which is located on the side wall of the tower above the water distributor. The air inlet is set, and the dry air from the outside of the tower and the humid air going up inside the tower are mixed through the air mixing condenser to reduce the white fog phenomenon at the air outlet. The structure adopted for the purpose of reducing the white fog is relatively complicated. The mixing of humid air is completed in the space below the air duct, the mixing time is short, and it is easy to cause uneven mixing. In addition, it cannot change the amount of water sprayed in winter, and there is no obvious water-saving effect. There is no solution to the problem that the louvers of the air inlet may hang ice when it is running in winter

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