Energy saving and consumption reduction of air separation unit

The main raw material of air separation unit is air, which is treated by a series of system devices to separate pure gas. Energy saving and consumption reduction of air separation unit mainly refers to the reduction of production and operation cost by improving the production efficiency of air separation equipment. Energy saving and consumption reduction of air separation unit is very important to air separation equipment users, and it is the main measure to increase profits. DEAR air separation has two ultra-low pressure discharge energy-saving patents, which can reduce the energy consumption of air separation equipment by 5% - 15%, and effectively realize the energy saving and consumption reduction of air separation unit.

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Function of subcooler in distillation column

The reflux liquid in the upper column of the distillation column is throttled by the lower column to the liquid air and liquid nitrogen of the upper column, and the reflux ratio of the upper column is regulated by the liquid nitrogen throttle valve. When the liquid air and liquid nitrogen pass through the throttle valve, the pressure will decrease, and the corresponding saturation temperature will also be reduced. If the supercooling degree of liquid is not enough, some liquid will be vaporized. The higher the gasification rate is, the lower the reflux ratio of the upper column is, and the purity of nitrogen is affected. Therefore, in order to improve the supercooling degree of the liquid nitrogen in the night sky through the throttle valve, a subcooler is generally set up to increase the supercooling degree of the liquid nitrogen in the liquid air.

Apr 10, 2025