Deep Cooling Argon Unit

Deep Cooling Argon Unit process introduces low-pressure process into the air separation equipment, which reduces the energy consumption of air separation and improves the safety of operation. The process calculation and unit equipment design adopt the corresponding chemical software to carry out process distillation calculation and structure calculation to ensure the equipment is advanced and reliable.

In order to meet the market demand, the company not only produces conventional external compression air separation equipment, but also develops a series of internal compression air separation process, which reduces the installation workload of the complete set of equipment as well as the amount of equipment maintenance.

Specification Classification

Working Principle

1. Basic Principle: Liquefy air to achieve separation based on the different boiling points of oxygen and nitrogen (argon).

2. The cooling required for air liquefaction is provided by pressurizing the air with a compressor and then expanding the gas through an expander to produce most of the cooling required for the air separation equipment, with the rest of the cooling being provided by the refluxed gases in the fractionator.

3. Air Separation: In a distillation column, the rising gas and the downstream liquid are subjected to heat and mass transfer on a plate or packing; the nitrogen content of the rising gas increases, while the oxygen content of the downstream liquid increases.

Separation Process

1. A single tower process that produces a single product（nitrogen or oxygen）.

2. Dual tower process: Oxygen and nitrogen can be extracted at the same time.

3. Multi-tower process: Oxygen, nitrogen and argon can be extracted simultaneously.

4. Internal compression process: product oxygen (or nitrogen) is compressed directly to the required pressure by pump compression in the cold box.

5. External compression process: The gas pressure of the product from the cold box is atmospheric, and the product is compressed to the required pressure by the booster at the back.

Producing Process

1. Air compression: Air that has been filtered out of mechanical impurities by a filter enters the air compressor and is compressed to the desired pressure.

2. Air pre-cooling: In the pre-cooling system the air is cooled to the right temperature and the free water is separated.

3. Air purification: Removal of water, carbon dioxide and other hydrocarbons by an adsorbent in an adsorber.

4. Fractionator Cold Box: Clean air enters the cold box and is cooled down through a heat exchanger to a temperature close to the liquefaction temperature and then enters the distillation column, and then get nitrogen from up part and get oxygen from lower part.