Counterflow closed-loop cooling towers, with cooling air and spray water flowing in opposite directions, feature a large heat exchange area, low resistance, simple structure, and easy maintenance, making them popular in the steel metallurgy, casting, and heat treatment industries.

1. Internal circulation: After the circulating water is heated by the heat source equipment and exchanged for heat, it enters the air-cooled radiator for inter-wall heat exchange. The cooled circulating water is then sent back to the heat source equipment by the pump.

2. External Loop: The spray water is delivered from the sump to the spray system, where it sprays out and comes into contact with the cooling coil for evaporation heat exchange. The humid steam is exhausted through the fan, and the non-vaporized spray water falls back into the sump, then pumped back to the spray system by the pump for another cycle.

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