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Cryogenic Air Separation Plants for Industrial Gas Production

Dec 23 , 2025

1. Introduction

The demand for industrial gas is steadily increasing around the world. Reliable production technology is therefore required. Cryogenic air separation plants can provide large volumes of high-purity gas. In addition, they ensure stable and continuous operation of industrial production. For this reason, high purity and large capacity make cryogenic technology the industry standard.

Nanjing Bangwin Gas can supply customers with highly advanced gas generation and gas separation technology. Therefore, users can realize a stable and efficient supply of gas.

Liquid Nitrogen Generation Plant

2. What Are Cryogenic Air Separation Plants 

Cryogenic air separation plants separate air into oxygen, nitrogen and argon by distillation at low temperatures. As a result, each gas can achieve a very high degree of purity.

Large-scale industrial gas supply projects are the main application of these plants. For this reason, steel mills and chemical complexes often use cryogenic systems.

Air Liquide – Air Separation Technologies

3. Working Principle of Cryogenic Air Separation

The sequence is strictly in order and continuous.

Air Compression and Purification

The machine compresses atmospheric air. Filters in the system eliminate dust, moisture, and hydrocarbons.

Cooling and Liquefaction

Heat exchangers cool down the air to cryogenic temperatures. Consequently, the air liquefies.

Fractional Distillation

The liquefied air is fed into distillation columns. Oxygen, nitrogen, and argon separate due to their boiling points.

Product Collection

The plant collects the separated gases as liquid or gaseous products. Storage systems are in place to handle distribution.

This process ensures a stable output and consistent product purity.

4. Main Components of a Cryogenic Air Separation Plant

A cryogenic air separation plant typically consists of the following parts:

Air compressor

Air purification unit

Main heat exchanger

Cold box

Distillation columns

Liquid oxygen tank

Liquid nitrogen tank

Argon recovery system

Control and safety system

Nanjing Bangwin Gas combines these components with an optimized layout. Therefore, the plant can achieve high efficiency.

5. Products of Cryogenic Air Separation Plants 

Cryogenic air separation plants produce various industrial gases.

Main Products

Oxygen (LOX or GOX)

Nitrogen (LIN or GN₂)

Argon (LAR or GAR)

Optional Products

Rare gases

Instrument grade nitrogen

High purity enables critical applications of these gases.

6. Benefits of Cryogenic Air Separation Technology

Cryogenic air separation plants have many advantages.

High Purity of Gases

Achieves purity up to 99.999%. Therefore, the plant satisfies highly demanding industries.

High Production Capacity

The system can manage very high flow rates.

Multi-Gas Production

The plant can produce oxygen, nitrogen, and argon at the same time.

Steady Continuous Operation

Supports 24-hour operations with little variation.

Long Lifetime of Equipment

The design is robust, ensuring long-term reliability.

7. Industrial Applications

Cryogenic air separation plants are widely used to support many industries.

Major Applications

Steel and metallurgy

Chemical processing

Petrochemical plants

Glass manufacturing

Electronics production

Energy and power generation

Hydrogen production support

Scale and purity continue to make cryogenic plants important.

8. Cryogenic Air Separation vs PSA and VPSA

Different gas production methods serve different needs.

Technology

Capacity

Purity

Energy Use

Typical Use

Cryogenic

Very large

Very high

Higher

Steel, chemicals

PSA

Small–medium

Medium

Low

Hospitals

VPSA

Medium–large

Medium–high

Lower

Industrial oxygen

Therefore, cryogenic air separation plants suit large industrial projects.

9. Why Select Nanjing Bangwin Gas

Nanjing Bangwin Gas is your professional industrial gas supplier. We offer:

Cryogenic air separation plants 

PSA nitrogen generators

VPSA oxygen generators

Liquid gas storage tanks

Complete gas engineering turnkey services

More complete solutions at: https://bangwingas.com/

The website also provides technical data and application notes.

10. FAQ

1. How high purity can cryogenic air separation plants achieve?

Cryogenic air separation plants can achieve a purity level of up to 99.999% depending on the specific design.

2. Are cryogenic air separation plants energy efficient?

Cryogenic air separation plants are not considered to be highly energy efficient due to the high energy consumption required for the cryogenic processes. However, they are suitable for large capacity applications where the demand for high-purity gases is high.

3. Can a single plant produce more than one type of gas?

Yes, a single cryogenic air separation plant can produce multiple types of gases, such as oxygen, nitrogen, and argon, all from the same system.

4. Does Nanjing Bangwin Gas offer turnkey solutions?

Yes, Nanjing Bangwin Gas offers turnkey solutions that include design, manufacturing, and commissioning of cryogenic air separation plants.

5. When should one opt for cryogenic air separation?

One should opt for cryogenic air separation when there is a need for high volume and high purity gas.

11. Conclusion

Cryogenic air separation plants offer the highest purity levels and the largest production capacity in the industry. The ever-increasing industrial demand makes cryogenic technology irreplaceable. Get the advanced cryogenic systems for your industry from Nanjing Bangwin Gas and enjoy an assured gas supply for the long term. Visit https://bangwingas.com/ 

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