1. Mpweya waiwisi umachokera ku mpweya, umadutsa mu fyuluta ya mpweya kuti uchotse fumbi ndi tinthu tating'onoting'ono tating'onoting'ono ndipo umalowa m'malo opanda lub air kompresa kuti aphikidwe ndi magawo awiri a siteji mpaka pafupifupi.0.65MPa(g).Imadutsa mozizira kwambiri ndikulowa mu precooling unit kuti izizirike mpaka 5~10℃.

Kenako imapita kusinthira-pa MS purifier kuchotsa chinyezi, CO2, carbon hydrogen.Choyeretsa chimakhala ndi ziwiya ziwiri zodzazidwa ndi ma molekyulu. Imodzi ikugwiritsidwa ntchito pomwe anther ikuwonjezedwa ndi zinyalala za nayitrogeni kuchokera m'bokosi lozizira komanso kudzera mu heater.

2.Atayeretsedwa, gawo laling'ono limagwiritsidwa ntchito ngati gasi la turbine expander, lina limalowa m'bokosi lozizira kuti liziziritsidwa ndi reflux (oxygen wangwiro, nayitrogeni wangwiro ndi zinyalala za nayitrogeni) mu chotenthetsera chachikulu.Mbali ina ya mpweya imachotsedwa pakati pa chotenthetsera chachikulu ndikupita ku makina opangira magetsi kuti apange kuzizira.Mpweya wambiri wowonjezedwa umadutsa mu subcooler yomwe imakhazikika ndi mpweya kuchokera pamwamba kuti iperekedwe kumtunda.Gawo laling'ono limadutsa modutsa ndikuwononga chitoliro cha nayitrogeni mwachindunji ndikutenthedwanso kuti chichoke mubokosi lozizira.Mbali ina ya mpweya imapitiriza kuzizidwa mpaka pafupi ndi mpweya wamadzimadzi womwe umayesa kutsika.

3. Mu mpweya wotsikirapo, mpweya umalekanitsidwa ndikusungunuka ngati nayitrogeni wamadzimadzi ndi mpweya wamadzimadzi.Gawo la nayitrogeni wamadzimadzi limachotsedwa pamwamba pa ndime yapansi.Mpweya wamadzimadzi utatha kuzizira ndi kugwedezeka umaperekedwa kuchigawo chapakati chapamwamba ngati reflux.

4. Mpweya wa okosijeni umachotsedwa m'munsi mwa chigawo chakumtunda ndikutenthedwanso ndi mpweya wowonjezera kutentha, kutentha kwakukulu.Kenako imaperekedwa kuchokera pagawo.Nayitrogeni wa zinyalala amachotsedwa kumtunda kwa chigawo chapamwamba ndipo amatenthedwanso mu subcooler ndi chotenthetsera chachikulu kuti atuluke.Gawo lina limagwiritsidwa ntchito ngati gasi wokonzanso kwa MS purifier.Nayitrogeni weniweni amachotsedwa pamwamba pa ndime yakumtunda ndipo amatenthedwanso mumpweya wamadzimadzi, madzimadzi a nitrogen subcooler ndi chotenthetsera chachikulu kuti atulutsidwe kuchokera pagawo.

5. Oxygen kunja kwa distillation ndime ndi wothinikizidwa kwa kasitomala.