Cryogenic air separation（ASU）, engineered to order
Worldwide installation · Technical response within 24 hours
Cryogenic air separation（ASU）, engineered to order
Worldwide installation · Technical response within 24 hours
Atmospheric air is filtered and compressed to the process pressure by a main air compressor.
Moisture, carbon dioxide and hydrocarbons are removed in a molecular sieve switching system before the air enters the cold box.
The purified air is cooled in the main heat exchanger and further expanded through a turbo expander to reach liquefaction temperature.
Oxygen, nitrogen and argon are separated in the distillation columns and drawn off at the required purity and pressure.
Product gas flows to storage, pipeline networks or customer filling stations through the designed delivery system.
Main air compressor sized for the plant capacity, operating conditions and site power supply.
Automatic switching adsorbers that remove CO₂, water and trace hydrocarbons.
Insulated cold box containing the plate-fin heat exchangers, distillation columns and cryogenic pipework.
Main heat exchanger that transfers cold between product and feed streams to reduce energy demand.
Upper and lower columns producing oxygen, nitrogen and argon fractions at design purity.
Provides the refrigeration required to maintain the cryogenic cycle.
Backup liquid tank, vaporizer and delivery skid for peak demand or maintenance periods.
PLC or DCS platform with operator interface, interlocks, alarms and remote monitoring.
PROJECTS & REFERENCES
Different sites, different operating requirements — one carefully engineered solution. Selected air separation, oxygen and nitrogen plant projects, and the engineering behind them.
SELECTED WORK
Three reference projects covering remote overseas supply, cold-climate metallurgy and high-purity nitrogen for electronics-grade demand.
Oman
150 / 4,800 Nm³/h
Combined oxygen and nitrogen plant, supplied with cryogenic liquid storage and cold-commissioned on site by our engineers.
Baotou, Inner Mongolia
2,000 Nm³/h O₂
Cryogenic oxygen plant for a metallurgical customer, with DCS control and on-site performance testing before handover.
Nantong, Jiangsu
99.999% purity
4,000 Nm³/h cryogenic nitrogen plant with guaranteed low residual oxygen, run from the customer's central control room.
TECHNOLOGY BACKGROUND
A cryogenic air separation unit (ASU) is an industrial system that separates atmospheric air into oxygen, nitrogen and argon through low-temperature distillation. Air is compressed, cleaned and cooled until it becomes a liquid, then separated in distillation columns where each gas is extracted at its own boiling temperature.
Because cryogenic separation scales efficiently, an ASU is normally the preferred technology for large gas volumes, high purity requirements and continuous operation — the typical conditions found in steel mills, chemical complexes, refineries and large industrial gas supply schemes.
01
Air compression
Atmospheric air is filtered and compressed to the process pressure by a main air compressor.
02
Air purification
Moisture, carbon dioxide and hydrocarbons are removed in a molecular sieve switching system before the air enters the cold box.
03
Cryogenic cooling
The purified air is cooled in the main heat exchanger and expanded through a turbo expander to reach liquefaction temperature.
04
Distillation
Liquid air is separated in a double column, where oxygen, nitrogen and argon are drawn off at different boiling temperatures and purities.
YOUR PROJECT
Share your gas requirement and site conditions — our engineers will propose a configuration and a budgetary figure.
+8618066130855
haishuoenergy@haishuoairsep.com
8618066130855
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