Basic Info.
- Function: Produce nitrogen products with required purity
- Technology: Inner Compression, External Compression, Single Column Process, Double Column Process, and Double Column with Pump Process (on this basis, pure oxygen column can be added to produce a small amount of oxygen products)
- Working principle: Cryogenic Distillation
- Application Field: Aerospace, petroleum, chemical, metallurgy, electric power, environmental protection, logistics, etc.
- Capacity: 500-100000Nm3/h N2
- Nitrogen Purity: ≤10ppmO2,can reach electronic grade
- Design Service Life: 20 Years
- Core Components: Air Compression system, Precooling system, Purification system, Distillation System, Turbo Expander System, Storage and vaporization system, Instrument & Electrical Control system
Product Parameters
|
Products |
Capacity (Nm3/h) |
Purity (vol) |
Pressure out of cold box MPa (G) |
Temp. out of cold box (℃) |
Remark |
|
GAN |
500-100000 |
≤10ppmO2 |
0.005~1.0 |
Normal temp. |
can reach electronic grade |
|
LIN |
0-6000 |
≤10ppmO2 |
0.4~1.0 |
|
can reach electronic grade |
Note: The liquid product pressure is measured at 0 meters elevation of the cold box, considering the static pressure of the liquid column.
Working Principle
The basic principle of cryogenic air separation unit is to liquefy the air, and separate the air components by cryogenic distillation according to the different boiling points of oxygen and nitrogen (argon).
|
No |
MAIN PART |
FUNCTION |
|
1 |
Air Compression System |
After the raw air is filtered, it is compressed to the required pressure by air compressor. |
|
2 |
Pre-cooling System |
Reduce the temperature of compressed air to about 8～10 ° C |
|
3 |
Air Purification System |
Removing the remained moisture, carbon dioxide and hydrocarbons of compressed air in the molecular sieve adsorber. |
|
4 |
Distillation System (Cold Box) |
Distillation system is the key to realize air separation. It mainly uses the boiling point difference of oxygen and nitrogen (argon), and uses the process of partial vaporization and partial condensation many times to make the low boiling point components continuously evaporate from the liquid phase to the gas phase, and at the same time, the high boiling point is continuously condensed from the gas phase to the liquid phase, and finally realizes the separation of oxygen and nitrogen (argon). |
|
5 |
Turbo Expander System |
The compressed gas expands in the turbine expander, to provides the cooling capacity required by the device. |
|
6 |
Storage and vaporization System |
Store the separated liquid nitrogen products to facilitate the sale and ensure the gas supply in the event of an emergency shutdown of the air separation unit. |
|
7 |
Instrument Control System |
The entire air separation unit is equipped with a central control system to monitor, control and interlock the process parameters of the entire air separation unit (air compressor, pre-cooling system, purification system, turbine expander, distillation system, liquid storage and vaporization system). The own control system for machine unit communicates with the air separation unit control system by Modbus, so that its operation status can be monitored at the operating station in the central control room. |
|
8 |
Electrical Control System |
The electrical control system provides power for the electrical equipment of the air separation unit. A reasonable and optimized power supply and distribution system design can not only reduce investment and loss, but also be the cornerstone and guarantee for the reliable operation of the air separation unit. |
Company Profile
Suzhou Doer Gas & Chemical Equipment Co.,Ltd. is a high-tech enterprise, whose businesscovers R&D, design, manufacture, installation, complete engineering and industrial servicesof cryogenic equipment. Doer's total factoryarea is 135,000m² and the company has morethan 600 employees, including over 90 designand research & development professionals. Dedicated to becoming a leader in the field ofcryogenic liquid storage and transportation, DOER strives to provide clients with one-stopprofessional services.
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FAQ
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