The Air Purification System (Molecular Sieve System) by Gaztron Engineering Pvt. Ltd. is a high-performance solution designed to produce ultra-pure air with a CO? concentration below 1 ppm and a temperature of 21°C. Featuring dual vertical absorbers and electric heaters, this system is essential for applications demanding extremely low impurity levels. The molecular sieve and activated alumina beds work in tandem to remove CO?, hydrocarbons, and moisture, ensuring consistent delivery of purified air to downstream processes.
Key Components and Operation of the Molecular Sieve Air Purification System:
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Dual Absorber Structure:
The purification system consists of two absorbers with a vertical double-bed design. Each absorber includes an upper bed filled with molecular sieve material for CO? and hydrocarbon removal and a lower bed containing activated alumina to trap moisture. The absorbers operate on an alternating cycle: while one bed purifies incoming air, the other undergoes regeneration.
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Electric Heater Integration:
Two electric heaters support the regeneration process by heating the waste nitrogen gas to 180°C. This heated nitrogen is passed through the saturated absorber bed, removing trapped water and CO? before it is vented to the atmosphere. This process ensures that the absorbers are fully regenerated and ready for the next purification cycle.
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Air Purification Process:
- Primary Air Treatment: Air from the air cooling tower, having been pre-cooled and stripped of free water, enters the molecular sieve system.
- CO? and Hydrocarbon Removal: The molecular sieve material in the upper bed adsorbs CO? to a concentration below 1 ppm and eliminates other hydrocarbons, ensuring ultra-clean air.
- Moisture Control: The activated alumina in the lower bed removes any residual moisture, delivering air at a stable dew point below -65°C.
- Process Air and Instrument Air Supply: After purification, part of the air proceeds to the cold box and braking compressor (turbo-expander booster) for further process needs, while the remaining portion is reserved for instrument air.
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Regeneration Cycle:
The nitrogen waste from the cold box, heated by electric heaters to 180°C, enters the saturated absorber bed, effectively regenerating it by desorbing water and CO?. This nitrogen is then released into the atmosphere, completing the regeneration cycle.
Technical Specifications:
- Air Purity: CO? < 1 ppm
- Outlet Temperature: 21°C
- Dew Point: Below -65°C
- Heating Temperature (Regeneration): 180°C
- System Components: Dual absorbers, electric heaters, molecular sieve, activated alumina
- Cycle Process: Continuous alternate operation with simultaneous regeneration
Benefits of Gaztron’s Molecular Sieve Air Purification System:
- Ultra-High Purity: CO? levels below 1 ppm, with moisture control at dew points below -65°C
- Efficient Regeneration Process: Dual beds and electric heating ensure continuous operation with minimal downtime
- Reduced Contaminants: Effective removal of CO?, hydrocarbons, and moisture for high-quality air output
- Enhanced Process Reliability: Ideal for sensitive applications such as air separation, ASU plants, and other industrial gas production systems
