What is the function of setting the air separation pre cooler

The statement on the second floor is basically correct, but it is clearly copied elsewhere. Your statement that "the air in the air separation system enters the tower at a temperature below minus 160" is long outdated, and this is still the process of the 8-90s.

Modern air separation pre-cooling systems are all air compressor aftercooling + air cooling tower methods. The compressed air is cooled to about 42 degrees Celsius after cooling, and then cooled to about 12 degrees through the air cooling tower, and impurities are removed before entering the purifier.

Everything else is correct.

General requirements for the arrangement of the air cooler: (l) The air cooler (hereinafter referred to as the air cooler) should be arranged on the downwind side of the minimum frequency wind direction of the device throughout the year; (2) The air cooler should be arranged above the main corridor, the top floor of the frame or the top of the tower; (3) The air cooler should not be arranged above the operating temperature equal to or higher than the spontaneous ignition point of the material and the equipment for conveying and storing liquefied hydrocarbons; Otherwise, a partition of non-combustible material should be used for isolation protection; (4) When multiple groups of air coolers are arranged together, they should be arranged in the same form, and it is advisable to adopt a row layout; It should be avoided that one part is arranged in columns and the other part is arranged in rows; (5) The inclined top air cooler should not face the ventilation direction of the dominant wind direction in summer. The inclined top air cooler should be arranged in columns, if arranged in rows, there should be no less than 3m of space between the two rows; (6) The distance between the frame columns of two humidifying air coolers or combined dry and wet air coolers arranged side by side should not be less than 3m; (7) Platforms should be set up at both ends of the air cooler tube bundle and the transmission machinery; (8) The frame of the air cooler or the side of the main corridor should be left on the ground with the necessary maintenance site and passage.

1. All (l) air coolers (hereinafter referred to as air coolers) should be arranged on the downwind side of the minimum frequency wind direction of the device throughout the year;

(2) The air cooler should be arranged above the main corridor, the top floor of the frame or the top of the tower;

(3) The air cooler should not be arranged above the operating temperature equal to or higher than the spontaneous ignition point of the material and the equipment for conveying and storing liquefied hydrocarbons; Otherwise, a partition of non-combustible material should be used for isolation protection;

(4) When multiple groups of air coolers are arranged together, they should be arranged in the same form, and it is advisable to adopt a row layout; It should be avoided that one part is arranged in columns and the other part is arranged in rows;

(5) The inclined top air cooler should not face the ventilation direction of the dominant wind direction in summer. The inclined top air cooler should be arranged in columns, if arranged in rows, there should be no less than 3m of space between the two rows;

(6) The distance between the frame columns of two humidifying air coolers or combined dry and wet air coolers arranged side by side should not be less than 3m;

(7) Platforms should be set up at both ends of the air cooler tube bundle and the transmission machinery;

(8) The frame of the air cooler or the side of the main corridor should be left on the ground with the necessary maintenance site and passage.