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What are the core functions and structures of the air cooling tower in air separation equipment?

What are the core functions and structures of the air cooling tower in air separation equipment?
Jun 23, 2025
Author: DEAR AST

The air cooling tower in the air separation equipment is the core device of the air pre cooling system, used for cooling and preliminary dehumidification of compressed air, providing low-temperature, dry raw air for subsequent purification and distillation processes.
Core function: Cooling, reducing the temperature of compressed air through heat exchange, reducing the load on subsequent molecular sieve adsorbers, and improving adsorption efficiency. Dehumidification, where some water vapor condenses due to cooling, reduces the moisture content of the air and prevents subsequent equipment (such as cold boxes) from freezing or clogging. Preprocessing provides more stable inlet conditions for the molecular sieve purification system, ensuring the overall efficiency of the air separation equipment.
Structural composition: The tower body is usually made of carbon steel or stainless steel, and the inner wall is treated with anti-corrosion to resist water vapor corrosion. Shape, cylindrical or square, with a packing layer or tray inside to increase the gas-liquid contact area. Spray system, the top spray device evenly sprays cooling water on the packing layer to ensure sufficient gas-liquid contact. The water source can come from water-cooled towers, circulating water systems, or chilled water systems. The filling layer is made of plastic, ceramic or metal, providing a large specific surface area to enhance heat and mass exchange. Function: Extend the gas-liquid contact time, improve cooling and dehumidification efficiency. Water collector, located at the top of the tower, captures water droplets in the air to prevent moisture from entering the subsequent system. Import and export pipelines, air inlet and outlet, bottom inlet and top outlet. The inlet and outlet of cooling water are usually located on the side or bottom of the tower.

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