An indirect air-cooling method for light-weight steel frame structure towers capable of saving water and preventing freezing

Abstract

The invention provides an indirect air cooling method of a light water-saving and anti-freezing steel frame structure tower, and belongs to the technical field of cooling towers. The indirect air cooling method of the light water-saving and anti-freezing steel frame structure tower is applicable to the areas in shortage of water resources, and the anti-freezing effect is obvious. According to the technical scheme, structure parameters of the indirect air cooling steel structure tower are determined according to the power level; the geometrical size of an air duct is determined according to the acquired structure parameters; the structure mode of the steel structure is determined; antiseptic treatment of the steel structure tower is performed; indirect air cooling water saving treatment of the steel structure tower is performed; indirect air cooling anti-freezing treatment of the steel structure tower is performed. The method can be widely applied to cooling towers in coal-fired power plants.

Description

technical field [0001] The invention relates to an indirect air cooling method for a light steel frame structure tower capable of saving water and preventing freezing, and belongs to the technical field of cooling towers. Background technique [0002] Cooling tower is an important equipment for industrial water treatment. It is widely used in many sectors of the national economy, such as electric power, petroleum, chemical industry, steel, building materials and other fields. It is one of the four main engines of thermal power plants. [0003] In the existing industry, especially in the power industry, the hyperbolic natural ventilation cooling towers used are reinforced concrete structures, and the hyperbolic natural ventilation cooling towers with reinforced concrete structures have the following disadvantages: [0004] 1. Large initial investment. The investment to build a hyperbolic natural ventilation cooling tower suitable for 600MW (tower height 180 meters, diameter ...

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Problems solved by technology

[0005] 2. Heavy weight

Construct a hyperbolic natural ventilation cooling tower suitable for 600MW intercooling cement structure (tower height 180 meters, diameter 150 meters), with a weight of about 85,000 tons. Due to its huge weight, the requirements for basic geology are relatively high , in places where the soil is relatively loose, pile foundations must be driven to increase the bearing capacity, and at the same time increase the investment

[0006] 3. The construction period is long and the construction site is large

[0007] The cement hyperbolic natural draft cooling tower has the above-mentioned unfavorable factors, which greatly restricts the use of this cooling tower in industrial fields other than the power industry

[0008] Existing natural ventilation wet cooling towers are only suitable for areas with relatively abundant water resources. Through direct contact between water in the cooling tower and air, heat transfer and evaporative heat dissipation are carried out, and the heat in the water is transferred to the air. Although this cooling method has Low investment, high heat exchange efficiency and other advantages, but the biggest disadvantage is the large consumption of water resources

[0009] In addition, the bottom of the existing natural ventilation wet cooling tower will freeze in winter in severe cold areas. The frozen cooling tower cannot work normally, which not only causes damage to the equipment, but also greatly affects the operation of the indirect air cooling system.

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