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How does air separation equipment ensure the purity of oxygen and nitrogen?

How does air separation equipment ensure the purity of oxygen and nitrogen?
Nov 19, 2024
Author: DEAR AST

The air is compressed by a high-capacity air compressor, enters a pre-cooling system, and then enters the main heat exchanger to further reduce the temperature and is removed by filtration to minimize the impact of impurities on the separation process. The filtered cold air enters the distillation tower for separation. In the distillation tower, the two are separated and purified through the evaporation and condensation cycle of the multi-stage tower plate, utilizing the difference in the boiling points of oxygen and nitrogen.
In the process design technology to ensure that there are three links: High-efficiency heat exchanger: the main heat exchanger adopts high-efficiency heat transfer technology, not only can the gas cool down to near-liquefaction state, but also reduce the energy loss and improve the separation efficiency. Optimized design of distillation tower: The design of distillation tower is crucial to the purity of oxygen and nitrogen. Higher separation efficiency can be achieved by increasing the number of plates, optimizing fluid distribution and improving gas-liquid contact effects. Advanced automatic control system: the air separation equipment is equipped with advanced automatic control system, which monitors the temperature, pressure and liquid level in the tower in real time to ensure the separation process is carried out stably, and at the same time, adjusts the operation parameters according to the feedback data to ensure the purity of oxygen and nitrogen.
The air separation equipment is able to produce high purity oxygen and nitrogen through precise process design, efficient technical guarantee, strict quality control and specific technical means.

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