The counter-flow closed cooling tower is an industrial cooling device that utilizes closed coil tubes combined with reverse airflow heat exchange. Its core advantage lies in achieving efficient cooling while completely isolating the cooling medium from direct contact with external air, thereby ensuring the cleanliness of the circulating water.
Core Working Principle
It relies on a dual-circuit system to dissipate heat:
Internal circulation: High-temperature process fluid flows within closed heat exchanger coil tubes, remaining completely isolated from the external environment throughout the process, with heat being conducted outward through the tube walls.
External circulation: The spray water is evenly distributed from the top distribution system of the tower onto the outer surface of the coil, forming a continuous water film. After absorbing heat from inside the tube, part of the water evaporates, carrying away a large amount of latent heat.
Air circulation: The fan draws in cold air from the bottom of the tower, which flows upward. This upward-moving air comes into 180-degree counter-current contact with the spray water moving downward, significantly extending the heat exchange time. The humid and hot air is finally expelled from the top of the tower.
