1.Design principle of this plant is based on the different boiling point of each gas in the air. Air is compressed, precooled and got removal of H2O and CO2, then to be cooled in the main heat exchanger until it is liquified. After rectification,production oxygen and nitrogen can be collected.
2. This plant is of MS purification of air with boosting turbine expander process. It is a common air separation plant, which adopts complete stuff filling and rectification for argon making.
3. Raw air goes to air filter for removal of dust and mechanical impurity and enters air turbine compressor where air is compressed to 0.59MPaA. Then it goes into air precooling system, where air is cooled to 17 ℃. After that, it flows to 2 molecular sieve adsorbing tank, which are running in turn, to be got removal of H2O, CO2 and C2H2.
Process of this unit is base on totally low pressure air separation plant with a recycle-air compressor, two booster-turbo-expanders and a normal-temperature molecular sieve purification system. The whole set includes self-cleaning air filter, air compressing system, air pre-cooling system, molecular sieve purifying system, turbo expander system, fractionating tower system, recycle air compressing system, liquid storage system and automation system.
