Containerized PSA Nitrogen Plant

For facilities facing fluctuating nitrogen demand, limited footprint, or fast-track project schedules, stationary nitrogen equipment often falls short in both flexibility and cost-effectiveness. The containerized PSA nitrogen plant integrates pressure swing adsorption technology within a standard shipping container framework, offering a plug-and-play on-site nitrogen pathway for chemical processing, oil and gas, mining, and food preservation applications.

How It Works & Key Advantages

This system uses a carbon molecular sieve (CMS) to separate oxygen from nitrogen based on how quickly each gas adsorbs. Compressed, pre-treated air enters twin vessels filled with CMS. Under pressure, oxygen sticks to the sieve while nitrogen passes through as product. Depressurizing releases the trapped oxygen, regenerating the media. The two towers cycle automatically-one adsorbs while the other regenerates-ensuring uninterrupted nitrogen flow.

Unlike cryogenic plants or liquid nitrogen delivery, this containerized PSA unit offers clear practical benefits:

• Make it when you need it – hook up power and air, get nitrogen in 15 minutes
• Set and forget – PLC controls adjust timing to maintain purity and flow without operator input
• Built to move – fits standard 20′ or 40′ containers; ship by truck, rail, or sea, connect services on site, and start right away

Key Performance Parameters (Typical Ranges)

Data below are based on standard reference conditions: ambient temperature 25°C, altitude ≤1000m, inlet air pressure 0.75 MPaG.

Energy & Cost Metrics

Power consumption is the key cost driver for on-site generation. At 99.5% purity, this containerized PSA unit uses about 0.25–0.35 kWh per Nm³ (including air compressor losses). Compared to liquid nitrogen delivery, plants running over 200 Nm³/day for more than six months typically pay back their investment within 18 months.

Higher purity costs more-bumping from 99.5% to 99.999% cuts output by 30–40% and raises energy use significantly. Our advice: size purity to your actual process needs, not the maximum possible. That's the surest way to keep lifecycle operating costs low.

Specs & Standards

• Vessels: 1.0 MPaG design, built to GB150 or ASME VIII-1
• Valves: Pneumatic angle-seat or butterfly, response ≤1.5s
• Control: Siemens S7-1200 PLC + 7″ touchscreen HMI
• O₂ analyzer: Paramagnetic or electrochemical, ±0.1% accuracy
• Enclosure: IP54, insulated, forced ventilation
• Noise: ≤75 dB(A) at 1 meter

Industrial Application Areas

• Chemical and petrochemical: reactor blanketing, catalyst regeneration, pipeline purging and displacement
• Oil and gas extraction/transport: tank inerting, pipeline drying, gas-lift assistance
• Mining operations: inert gas injection for fire prevention and methane dilution in goaf areas
• Food and beverage: modified atmosphere packaging, storage tank blanketing
• Pharmaceutical and electronics: API synthesis protection, SMT reflow oxidation prevention
• Metal heat treatment: bright annealing, carburizing atmosphere conditioning

Customization & Add-Ons

Every site has its own quirks-purity targets, control preferences, hookup styles. We offer modular options to match:

• Purity tuning – set anywhere from 95% to 99.999%; the PLC automatically adjusts cycle timing to hit your number
• High-pressure boost – add an integrated booster compressor to push product up to 30 MPaG, ideal for cylinder filling
• Plant-wide connectivity – standard Modbus RTU/TCP and Profibus DP for easy DCS or SCADA integration
• Harsh-condition builds – special versions for high altitude (>2000 m), tropical humidity (>90% RH), or down to –40°C
• Redundancy packages – duplex valves and dual analyzers keep production running even during component service, for mission-critical processes

Tell us your conditions-we'll tailor the configuration accordingly.

Quality & Support

Built under ISO 9001:2015. Pressure parts are third-party inspected-certificates available on request. Every unit runs a 72-hour full-system test before shipping, with performance curves included.

Support includes:

• Commissioning help (on-site or remote)
• Operator training and SOPs
• Spares shipped within 72 hours
• Annual preventive maintenance visits

Shenger Gas has been engaged in pressure swing adsorption technology for over a decade. Our work goes beyond equipment supply-we assess each user's specific conditions, including feed air composition, demand patterns, and utility availability, then tailor the design accordingly. This ensures every containerized PSA nitrogen plant we deliver performs reliably from day one. If you are evaluating on-site nitrogen generation, we offer site condition reviews and preliminary proposals at no cost.

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