The internal circulating water of closed cooling tower is closed and does not contact with outside air and water, which can avoid water pollution and corrosion and ensure the purity and stability of water.
Because the circulating water in the closed cooling tower is not evaporated and consumed, it does not need to be replenished, which can save water resources and operating costs.
The external circulating water of closed cooling tower is only used to reduce the temperature of internal circulating water, and does not participate in process heat exchange. Low-quality water sources, such as tap water, river water and seawater, can be used.
The invention has the advantages of compact structure, small occupied area, convenient installation and low noise, and is suitable for use in cities or places with limited space.
However, enclosed cooling towers also have some disadvantages:
The heat exchange efficiency of closed cooling tower is relatively low, and more fan power and spray pump power are needed to drive the flow of air and water.
The external circulating water of closed cooling tower will be continuously consumed due to evaporation, wind blowing, sewage discharge and other reasons, so it is necessary to regularly check the water quality and replenish water to prevent scaling and blockage.
The internal circulating water of closed cooling tower may produce some chemical changes or biological pollution due to its long-term operation at high temperature, so it needs to be cleaned and disinfected regularly.
To sum up, whether the closed cooling tower is suitable for water treatment industry needs to be comprehensively considered and selected according to specific process conditions, economic benefits, environmental impact and other factors. You can refer to some professional design manuals or consult some professional manufacturers for more information and suggestions.