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PSA Oxygen Plant Demo
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Technical Facts
PSA Oxygen generators are suitable for flows from 1 nm3/hr to 200 nm3/hr. For higher flows, we recommend VPSA oxygen generators.
Purity up to 95% is easily achievable by PSA oxygen generators, with balance mostly being a mix of inert gases such as nitrogen and argon. While this purity is suitable for many applications such as water purification, furnace enrichment, it may not be suitable for applications where 99% purity is a must.
Our PSA oxygen generators can deliver oxygen directly at 5 kg/cm2g pressure without an additional booster, making is suitable for most applications. If higher pressure is required by customer process or for storage, then we supply an additional booster.
Our psa oxygen plant deliver very dry gas, with dew point as low as (-) 40°C. We also offer measuring instruments for online detection of gas dryness.
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Safety Interlocks
Oxygen Purity
The generator is equipped with Online Digital Analyzer to measure Oxygen purity before it goes to Buffer tank. If purity falls below set points, the Oxygen supply to storage tank stops & alarm signal is displayed to indicate generator malfunction. Drop in purity also signals for the gas supply to be diverted to the backup Oxygen supply. This is done automatically by the switchover panel. It closes Auto-shut-off valve in Oxygen supply line & actuates reserve cylinder Oxygen supply valve to maintain continuous Oxygen supply.
Pressure
Pressure in Oxygen Buffer tank is continuously monitored by Pressure Transmitter. Whenever Oxygen Buffer vessel pressure falls below 3.5 Bar, an alarm is sounded. Drop in buffer vessel pressure also activates the reserve supply system to be activated automatically through the switchover panel.
Backup System
In most hospital applications, Oxygen is consumed at 4-Barg pressure & this pressure is directly produced from our Onsite Oxygen generators. For back-up of Oxygen, either market Oxygen cylinders can be connected or, alternatively, we supply Cylinders filling system which fills Oxygen cylinders up to 150-Bar pressure & these Oxygen cylinders are used as back-up cylinders. Also, for remote locations use, these filled Oxygen cylinders can be used.
HOW IT WORKS
How PSA Nitrogen Generator Works
PSA oxygen generators utilize the well-known and mature Pressure Swing Adsorption technology. Atmospheric air comprises of 20-21% oxygen and the PSA process utilizes Zeolite molecular sieves to extract this Oxygen from air. Oxygen at 95% is delivered, while the nitrogen adsorbed by the molecular sieves is vented back into air through the exhaust line.
PSA Oxygen Plant process consists of 2 vessels filled with Molecular Sieves and Activated Alumina. Clean compressed air at 30°C temperature is passed through one vessel and oxygen comes out as product gas. The exhaust gas (Nitrogen) is discharged back into the atmosphere. Upon saturation of the molecular sieve bed, the process switches Oxygen generation to the other bed by automatic valves, while allowing the saturated bed to undergo regeneration by depressurization and purging to atmospheric pressure. Thus 2-vessels keep cycling alternately in Oxygen production and regeneration ensuring Oxygen gas is continuously available to your process.
HOW IT WORKS
How VPSA Nitrogen Generator Works
For higher flow requirements, we recommend considering VPSA oxygen generators utilize the well-known and mature Vacuum Pressure Swing Adsorption technology. Process for VPSA is identical to PSA with the differences highlighted below:
- VPSA systems use low pressure blowers for better energy efficiency for higher air flows
- In the regeneration step of the cycle, a vacuum pump is utilized to assist with optimal regeneration of molecular sieves
- Due to lower working pressure, VPSA systems deliver Oxygen at a pressure of up to 1.3 kg/cm2.
- Customers requiring higher pressure will need to opt for a booster compressor downstream of the VPSA system.
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Applications
Our PSA Oxygen Gas Generators are widely used across many industries including:
Aquaculture & Fish Farming
Food/Beverage Industries
Sintering Process in Metallurgy
Chemical Oxidation Processes
Paper and Pulp Industry
Battery Manufacturing Industries
Ceramics Production in Industries
Glass industries for Furnace Enrichment
Sewage and Wastewater Treatment Plants
Metal’Gas Welding, Cutting and Brazing
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