Air cooling tower and self-cleaning method

The invention discloses an air cooling tower and a self-cleaning method, and relates to the field of air separation technical equipment. The air cooling tower comprises a tower body and further comprises a spraying system and a blowdown system, wherein the spraying system comprises a spraying head and a spraying pipeline, the spraying head communicate with the spraying pipeline, the spraying head is arranged in the tower body, a switch valve is arranged on the spraying pipeline, the blowdown system comprises a blowdown pipeline, the blowdown pipeline communicates with the spraying pipeline, the communicating position of the blowdown pipeline and the spraying pipeline is located between the switching valve and the spraying head, and a blowdown valve is arranged on the blowdown pipeline and is opened when the switching valve is closed. According to the air cooling tower, the spraying system can be self-cleaned, and impurity accumulation is reduced; and compared with an existing manual disassembly and assembly c