Pressure Swing Adsorption (PSA) type Nitrogen Generator provides a cost-effective means for on-site gas generation. It is based on using the latest PSA technology and utilizes Carbon Molecular Sieve (CMS) to separate nitrogen from the other gases contained in air. The Nitrogen Generator uses two beds of CMS to separate compressed air into a high-pressure nitrogen product stream and low-pressure oxygen enriched waste stream. Typical feed air pressure is 7.6 bar. Systems are available with a product purity up to 99.999% nitrogen (10 ppmv oxygen).
Generators are supplied as complete systems, ready for hookup to a compressed air supply, and it includes air filters and controls for automatic operation. Startup is at the flip of a switch and maintenance is limited to changing filters every three to twelve months. Each Nitrogen Generator comes pre-tested and fine-tuned to meet the customer specified nitrogen flow rate and purity.
Our nitrogen generators have proven to be very popular and reliable for many applications. Having your own generator eliminates the hassle and safety issues you have with high-pressure nitrogen bottles or liquid nitrogen, and you will always have nitrogen available at a reduced cost.
The N2-PSA plant is controlled by a programmable logic controller (PLC).
Its main control features include:
- Automatic operation of the entire N2-PSA plant
- Supervision of process parameters with safety shut down and alarm in case of abnormal plant operation
- Control of the process values on a display
- Sophisticated plant diagnostics
- The purity of the product is being checked continuously by an automatic online O2-analyzer
Start-up and Shut-down
The start-up of the plant is a simple push button operation. The product is being delivered within a short time from start-up.
At shut-down of the plant, a precisely defined program cycle continues to run for a few minutes before complete shut-down is reached. The adsorbers are then in regenerated conditions and prepared for restart of operation. After restart product in accordance with specification can be produced within a few minutes.
Operation and Maintenance
The PSA plant is designed to run un-attended during normal operation. The plant requires a minimum of operating and maintenance attention. The N2-PSA will be designed and constructed to provide proper flexibility and easy accessibility for operation and maintenance of the machinery, valves and instrumentation.
The Scope of Supply
The scope of supply mainly comprises the following material and equipment:
- Air compressor, if required
- Adsorber vessels
- Specially selected adsorbent material
- PSA buffer drum
- Valve skid
- Control system
- Nitrogen product O2-analyzer
- Nitrogen product compressor, if required