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Classification of process form of air separation unit: what are the configurations of internal pressure process

Classification of process form of air separation unit: what are the configurations of internal pressure process
Aug 24, 2022
Author: DEAR AST

The configuration of the internal pressure process of the air separation unit varies greatly according to the compression mode of the product, including the following aspects:

1. Air compressor and filter system: adopt domestic or imported machines equipped with domestic self-cleaning filters, and the booster is generally imported;

2. Nitrogen water precooling system: make full use of the cooling capacity of dry nitrogen, reduce the temperature of chilled water, and cancel the chiller (or with standby chiller);

3. Purification system: electric heating or steam heating, automatic switching; Molecular sieve + alumina double bed structure is adopted to prolong the service life of molecular sieve;

4. Refrigeration system: two domestic expanders, one for use and one for standby; Or an imported expander; Or one imported and one domestic expander;

5. Heat exchange system: high-low mixed domestic large plate type or high-low mixed imported large plate type or split type (low-pressure plate is made in China and high-pressure plate is imported), and supporting liquid pump for pressurization;

6. Main rectification system: sieve plate lower column (or packed column), regular packing upper column, plate fin multi-layer or falling film main cooling;

7. Argon production system: regular packed argon column, full rectification three column argon production;

8. Nitrogen pressure system: nitrogen penetration or nitrogen piston;

9. Instrument control system: domestic or imported DCS.

DEAR air separation plans the project scheme design to ensure that the customer's project is economical and reasonable.

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