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The role of the cooling tower is to carry out heat exchange between the cooling water with waste heat in the tower and the air, so that the waste heat is transferred to the air and dispersed into the atmosphere. Cooling towers are divided into wet cooling towers and dry cooling towers in two forms according to the contact mode of cooling water and air. In a wet cooling tower, water is in contact with air. After a period of operation, pollutants in the air, such as dust, debris, soluble gases and bacteria, can enter the circulating cooling water system. With the continuous circulation and evaporation of cooling water, the nutrient source in the water increases, which promotes the rapid reproduction of algae microorganisms, which not only deteriorates the quality of process water, but also mixes with other impurities to form sticky scale, and at the same time, salt concentration will occur. The hardness of cooling water increases, which will cause corrosion and scaling of circulating equipment pipelines, reduce heat transfer efficiency of heat exchangers, reduce water passing section, and even cause corrosion and perforation of pipelines in circulating equipment, thereby reducing the service life of the refrigeration equipment.

If the closed cooling tower does not need to operate in winter, the spray water and the internal circulating water must be emptied during shutdown. It is recommended to use compressed air for forced emptying of internal circulating water.

Many power plants use steam for power generation, and need to use cooling towers for circulating water cooling. The main function of the cooled water is to send it to the condenser to condense the steam that has done work in the steam turbine into water and then send it back to the boiler for heating. Grant cooling tower can provide the best solution for circulating water refrigeration in the power industry.