The closed cooling tower is to place the tubular heat exchanger in the tower, and ensure the cooling effect through the heat exchange of the circulating air, the spray water outside the pipe and the circulating water inside the pipe. During operation, heat is transferred from the internal fluid through coils and spray water to the external air. The function of the coil is to isolate the external air from the process fluid, ensure that the water quality is clean and not polluted, and protect the efficient operation of the main equipment and improve the service life. Because the circulating water is a closed circulation in the pipe, it can stop the spray water system when the outside temperature is low, and play a water-saving effect. There are four types of closed cooling towers.

• No contact with the outside world during operation, can keep the cooling water clean;

• Energy saving and environmental protection, compared with the traditional cooling tower system, the cooling pump head is greatly reduced, and the operating cost can be reduced by about 45%;

• Compact structure, easy installation, easy maintenance.

• offers solutions for a wide range of cooling applications with axial flow fans.
  

• The box size of the unit is large, can meet various layout needs;

• widely used in all kinds of intermediate frequency furnace, electric furnace circulating water cooling;

• Used for cooling large circulating water in the production area of chemical and petrochemical industries;

• Used for cooling water or cooling oil of various machine tools, machining equipment, robots, welding equipment.