Air Separation Plant 3700 Nm3/h Liquid Nitrogen Plant Oxygen Plant Low Power Consumption

Working theory:

This equipment is made up of two parts: pressure swing absorption part and Stirling cooler.

Air will be compressed to0.7MPa after it flows into compressor. Then it comes into PSA system after it is cooled and purified (removal of water, oil and dust). Under the condition of alternating pressure, molecular sieve inside the PSA absorbs the rest of water, co2 and oxygen in the air in order to get nitrogen with certain purity or the absorbed water, CO2 and oxygen will be used to regenerate molecular sieve for next cycle. Two absorption cylinders switch mutually to provide continuous nitrogen gas. Nitrogen gas pressure will be released to a lower level and it flows into Stirling Refrigerator to be cooled by coolant. Finally liquid nitrogen is obtained.

Flow chart:  

Air →Air compressor→precooler and air drier→oil filter→PSA system→Stirling refrigerator→cryogenic tank

technical specification

scope of supply:

regenerative refrigerator                                              1set 

Model                                                                 3LY-0.8/194

Type                                                          Single cylinder regenerative refrigerator

medium                                                Hydrogen(15g)or Helium(30g)

coldness product rate(-194℃)                      800Kcal/h

Inflation pressure                                                    1.9MPa

Average working pressure                                    2.5-2.6MPa

Starting time                                                           6-8min

 Defrosting time                                                  40min

 Cooling water consumption                             1t/h

 Cooling water pressure                                        0.2MPa

 Motor power                                                             11KW

 2,basic accessories

 3,spare parts and tools