Cryogenic Air Separation Nitrogen Generator

The cryogenic air separation nitrogen generator produces high-purity nitrogen through air liquefaction and rectification. It is designed for continuous, large-volume applications where PSA cannot meet purity or stability requirements.

Unlike adsorption-based units, this process also allows liquid nitrogen extraction for backup or sale.

Working Principle

Air is compressed, pre-cooled, and purified before entering the main heat exchanger. After cooling to near liquefaction temperature, the air enters a distillation column. Nitrogen (boiling point -196°C) separates from oxygen (-183°C) through repeated vapor-liquid contact.

Pure nitrogen exits the top of the column. Part is sent to the user, part is condensed and returned as reflux. The bottom fraction (oxygen-enriched liquid) is discharged.

Cold balance is maintained by an expansion turbine. Once stable, the unit can run continuously for weeks or months.

Technical Specifications

Consumption depends on purity, capacity, and site conditions. Higher purity directly increases energy use.

Customization

Each cryogenic air separation nitrogen generator must be designed per site. Standard skids do not apply.

Customizable items:

• Capacity + purity combination
• Liquid N2 extraction (0 – 20%)
• Control: local panel / PLC / DCS
• High-altitude or hazardous area adaptation

Recommended input for quotation:

Average + peak flow / cooling water type / power supply / site dimensions

Delivery Process

1. Process design (PFD, PID, mass balance)
2. Manufacturing: 4 – 8 months
3. Modular shipping
4. Site installation supervision
5. Commissioning: purge → cold test → rectification → product take-off
6. Operator training

Services & Certifications

Services:

• Warranty: free repair for manufacturing defects
• Post-warranty: annual inspection, spare parts, remote support
• Emergency response: solution within 24 hours

Certifications:
ISO 9001, ASME / CE (as required per destination)

Note on references:
Case data is available upon request for similar applications (chemical, electronics, metallurgy, heat treatment). Contact Shenger Gas for comparable operating records.

Why Shenger Gas

Shenger Gas does not push standard models. Every cryogenic air separation nitrogen generator is sized based on your actual consumption curve, utility conditions, and ten-year operating cost.

We have seen too many units that are oversized (wasting capital) or undersized (causing production stops). A nitrogen generator delivers value only when it runs reliably year after year. Send your site parameters – Shenger Gas will provide an energy estimate first, then discuss configuration.

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