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What are the development status and characteristics of precooling system of air separation unit

What are the development status and characteristics of precooling system of air separation unit
Aug 08, 2022
Author: DEAR AST

The air cooling tower of the precooling system is used to directly contact water and air to cool the air to the specified design temperature, and it is not allowed to bring water into the subsequent system.

The lower hump plate is set to ensure more uniform air flow distribution, change the traditional form, make the gas flow section larger, reduce local resistance and save energy consumption. The lower part adopts large diameter reinforced Bauer ring, which not only ensures the strength of the packing under high temperature, but also reduces the resistance of the packing; The upper part adopts a small-diameter high-efficiency enhanced Bauer ring, which further increases the heat exchange area per unit volume and the heat transfer efficiency. The temperature difference at the outlet of the air cooling tower is only about 1 degree. With the adoption of high-efficiency distributor, the water inlet pipe is distributed at the first level, so that the water is evenly distributed in the first level tank in a linear shape, and the first level distribution tank makes the water evenly distributed in the second level distribution tank in a sheet shape. Finally, the secondary distribution tank distributes water to the packing layer. Four in one anti entrainment structure: high efficiency trough distributor, with enough heavy separation space, cyclone centrifugal separation device and screen demister. The setting of the sight glass and the connecting pipe can clearly see the upper condensed water volume, so as to judge the water removal effect. The other connecting pipe makes the upper condensate return to the bottom of the air cooling tower in time.

DEAR air separation has a professional technical team to provide customers with high-quality design services for air separation equipment construction projects. The development of material industry, the improvement of processing means and the abundance of experimental data have brought about the production of various high-efficiency packings and high-efficiency distributors, which provide material basis and theoretical support for the design and manufacture of current air cooling towers.

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