Waste heat generated during industrial production or refrigeration processes is generally removed by cooling water. The function of the cooling tower is to exchange heat between the cooling water carrying the waste heat and the air in the tower, so that the waste heat is transferred to the air and dispersed into the atmosphere . For example: In a thermal power plant, the boiler heats water into steam at high temperature and high pressure, which causes the steam turbine to do work allowing the generator to produce electricity. Once the steam turbine is operating, the waste steam is discharged. into the condenser, where it exchanges heat with the cooling water and condenses into water, which is then pumped by a water pump and returned to the boiler for recycling. During this process, waste heat from the exhaust steam is transferred to the cooling waterissement, causing an increase in water temperature. The cooling water carrying the waste heat transfers heat to the air in the cooling tower and is discharged from the air duct into. the atmospheric environment. Scope of application of cooling tower: mainly used in air conditioning cooling systems, refrigeration series, injection molding, bronzing, foaming, power generation, steam turbine, water processing aluminum profiles, air compressors, industrial water cooling and other fields. air conditioning cooling, refrigeration, plastic chemical industry. Structural form edit this paragraph In order to save energy, large cooling towers mainly use natural ventilation cooling towers, which are composed of ventilation tubes, rafter columns, annular baseses, water spray devices and tower base materials.
Fans are mostly hyperbolic rotating reinforced concrete shells, which have good properties in structural mechanics and fluid mechanics. The lower edge of the shell rests on equally spaced V- or X-shaped inclined pillars to form the air inlet of the cooling tower. The load of the shell is transmitted to the foundation through the inclined piers. The foundation is usually made into a ring-shaped foundation with an inclined plane to resist part of the ring tension transmitted by the inclined piers, or it can also be made into a separate single foundation or pile foundation.
The fan throat diameter is the smallest. When the shell is calculated to be stable under pressure, the shell wall is thinnest, from there the diameter gradually increases vers upwards to form the airflow outlet. broadcast section. There is a rigid ring at the top of the tower. The lower part of the throat gradually expands into a hyperbola shape, and the lower wall of the shell thickens accordingly, forming a lower ring beam with a certain rigidity. The fan can also be made in the form of a frustoconical shell or a combined conical shell, or a polygonal tower with a steel frame covered with wooden cladding or asbestos-cement cladding. A 146 meter high dry cooling tower at the Schmeilhausen nuclear power plant in Germany uses a cable-structured tower, covered with aluminum cladding plates, which has good earthquake and wind resistance.
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