A cylinder filing ASU plant in India can produce 100 to 5,000 tonnes of oxygen per day with purity levels ranging from 95% to 99.5 percent or higher.
The Following Are the Main Steps in the Air Separation Process:
- Filtration is used to remove dust and other impurities.
- Compression Which compresses air between 4 and 150 Bar g with inter-stage cooling temperature assembly for lower the temperature rise.
- Removal of Contaminant By using a constantly regenerated molecular sieve bed it removes any remaining water vapor, hydrocarbons, and carbon dioxide that would freeze and plug the Cryogenic equipment
- Heat Exchange In which air is passed through integrated heat exchangers and cooled against product and waste cryogenic streams to produce oxygen and nitrogen-enriched liquefied air. This is accomplished through the use of refrigeration in separate low- and high-pressure distillation columns.
- Product Compression Which compresses oxygen to a predetermined settled
- Storage involves storing the liquid oxygen produced by the ASU in cryogenic insulated storage tanks.