Cooling water systems in water-cooled condensers
DATE:2024-09-24 10:42:58
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1, cooling tower recirculating water system cooling tower is divided into natural ventilation cooling tower and forced ventilation cooling tower two kinds. (1) natural ventilation cooling tower natural ventilation cooling tower is through the water jet or the role of the density difference will be sucked into the air, it does not have a fan. The action of the water jet causes the air and water to flow in the direction of the tower. The water jet can be either vertical or horizontal.
The form of the spray water has a great relationship with the cooling efficiency, because the size of the surface area of the water and air contact is related to the form of the spray water. Practice has shown that the spray before and after the pressure difference of 0.05 ~ 0.07MPa, can produce a suitable spray water form. In some natural ventilation cooling towers, filled with wooden boards or other fillers to increase the wetting surface of the tower, and can turn the water into water droplets, while reducing the rate of falling water. In such towers, the droplets are created by the impact between the water and the filler, and no nozzles are required. The amount of air flowing through a naturally ventilated cooling tower is related to the wind speed and the cooling capacity of the tower varies with the wind speed. In addition, these towers must be located in a ventilated area, usually mounted on a roof.
Natural ventilation cooling tower in the air flow speed is quite low, the impact of the back wind is extremely sensitive, usually used in the working temperature requirements of the system is not high. Since no fan is used, energy can be saved.
(2) Forced-ventilation cooling tower forced-ventilation cooling tower with fans to force air flow, specifically can be divided into suction type and blast type. Smaller cooling towers can be placed indoors. This type of cooling tower has a large air flow and high velocity, thus its cooling capacity is significantly greater than that of a natural ventilation cooling tower. In most forced-air cooling towers are filled with wood panels or other fillers to further improve the cooling efficiency room. The top of the tower is equipped with a water barrier to prevent water droplets from being carried away by the air.
2, cooling tower maintenance management (1) constantly replenish tap water or other clean water. Supplementary art should be more than evaporated water. More water is supplemented in order to put off some of the water containing more salt. Ensure that the hardness of the water in the cooling system remains within the permissible range. The discharged water leads people to the waste water treatment station. In order to control the amount of water to be discharged, an automatic discharge valve can be used. The opening and closing of the valve is controlled by the concentration of salt in the circulating water. (2) When the carbonate content of the water is close to saturation, an increase in temperature will cause salt precipitation. Chemical treatment can slow down the rate of scaling or soften the scale layer so that it can be easily washed out by water. (3) In order to reduce the corrosive effect of water on metal corrosion, the water in the circuit should be slightly alkaline. (4) When the top of the cooling tower is exposed to the atmosphere, chemicals should be dropped continuously or periodically to discourage algae growth. In the spray structure, the dust absorbed from the air during the spraying process will accumulate in the system, most of them form a thin layer of scale, this dust particles are so small that the filter of the pump suction population can do nothing about it, for this reason, the pipe needs to be cleaned periodically.
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The form of the spray water has a great relationship with the cooling efficiency, because the size of the surface area of the water and air contact is related to the form of the spray water. Practice has shown that the spray before and after the pressure difference of 0.05 ~ 0.07MPa, can produce a suitable spray water form. In some natural ventilation cooling towers, filled with wooden boards or other fillers to increase the wetting surface of the tower, and can turn the water into water droplets, while reducing the rate of falling water. In such towers, the droplets are created by the impact between the water and the filler, and no nozzles are required. The amount of air flowing through a naturally ventilated cooling tower is related to the wind speed and the cooling capacity of the tower varies with the wind speed. In addition, these towers must be located in a ventilated area, usually mounted on a roof.
Natural ventilation cooling tower in the air flow speed is quite low, the impact of the back wind is extremely sensitive, usually used in the working temperature requirements of the system is not high. Since no fan is used, energy can be saved.
(2) Forced-ventilation cooling tower forced-ventilation cooling tower with fans to force air flow, specifically can be divided into suction type and blast type. Smaller cooling towers can be placed indoors. This type of cooling tower has a large air flow and high velocity, thus its cooling capacity is significantly greater than that of a natural ventilation cooling tower. In most forced-air cooling towers are filled with wood panels or other fillers to further improve the cooling efficiency room. The top of the tower is equipped with a water barrier to prevent water droplets from being carried away by the air.
2, cooling tower maintenance management (1) constantly replenish tap water or other clean water. Supplementary art should be more than evaporated water. More water is supplemented in order to put off some of the water containing more salt. Ensure that the hardness of the water in the cooling system remains within the permissible range. The discharged water leads people to the waste water treatment station. In order to control the amount of water to be discharged, an automatic discharge valve can be used. The opening and closing of the valve is controlled by the concentration of salt in the circulating water. (2) When the carbonate content of the water is close to saturation, an increase in temperature will cause salt precipitation. Chemical treatment can slow down the rate of scaling or soften the scale layer so that it can be easily washed out by water. (3) In order to reduce the corrosive effect of water on metal corrosion, the water in the circuit should be slightly alkaline. (4) When the top of the cooling tower is exposed to the atmosphere, chemicals should be dropped continuously or periodically to discourage algae growth. In the spray structure, the dust absorbed from the air during the spraying process will accumulate in the system, most of them form a thin layer of scale, this dust particles are so small that the filter of the pump suction population can do nothing about it, for this reason, the pipe needs to be cleaned periodically.