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Power unit for compressor of air separation plant

Power unit for compressor of air separation plant
Feb 04, 2026
Author: DEAR AST

Compressors are important energy consuming equipment in air separation plants, and generally use electric motors as power units. However, if the user has sufficient steam sources, they can be driven by steam turbines to reduce energy waste. In particular, centrifugal compressors with large or ultra large hole pile devices are more suitable for steam turbine driving. Currently, air compressors and superchargers equipped in the internal compression process have generally adopted the method of steam turbine driving.

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When the amount of processing air is reduced, the rising steam and reflux liquid in the upper column will be reduced, but the reflux ratio will not change. Therefore, the reduction of processing air in a small range will not affect the purity of oxygen and nitrogen, and the reduction of processing air volume will help to reduce the pressure of the upper and lower columns. However, according to the material balance, the production of oxygen and nitrogen will naturally decrease when the amount of processing air is reduced. If the amount of processing air is too small, there will be leakage on the tray. If the heat and mass exchange of the leaked liquid is not sufficient, the purity of oxygen and nitrogen will be greatly affected, and even the normal production can not be realized. Therefore, the minimum allowable load of distillation column is generally specified.
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