Fakitale ya ASU imapanga mpweya wamadzimadzi monga njira zisanu ndi ziwiri izi:

1. Mpweya usanakanikizidwe, umasefedwa kale fumbi.

2. Mpweya umakanikizidwa pomwe kuthamanga komaliza kotumizira kumatsimikiziridwa ndi kubwezeredwa ndi momwe madzi alili (mpweya kapena madzi) a zinthuzo. Kupanikizika kwanthawi zonse kumakhala pakati pa 5 ndi 10 bar gauge. Mpweya ukhozanso kukanikizidwa ku kuthamanga kosiyanasiyana kuti uwonjezere kugwira ntchito kwa ASU. Panthawi yokanikizidwa, madzi amakanikizidwa m'malo ozizira pakati pa magawo.

3. Mpweya wopangidwa nthawi zambiri umadutsa mu sefa ya molekyulu, yomwe imachotsa nthunzi iliyonse yamadzi yotsala, komanso carbon dioxide, yomwe ingaziziritse ndikutseka zida za cryogenic. Masefa a molekyulu nthawi zambiri amapangidwa kuti achotse ma hydrocarbon aliwonse a gasi mumlengalenga, chifukwa izi zitha kukhala vuto pakusungunuka kwa mpweya komwe kungayambitse kuphulika. Befa la masefa a molekyulu liyenera kubwezeretsedwanso. Izi zimachitika poyika mayunitsi angapo omwe amagwira ntchito mosinthana ndikugwiritsa ntchito mpweya wouma wopangidwa pamodzi kuti uchotse madzi.

4. Mpweya wopangidwa umadutsa mu chosinthira kutentha chophatikizidwa (nthawi zambiri chimakhala chosinthira kutentha cha mbale) ndipo chimaziziritsidwa motsutsana ndi mitsinje ya cryogenic ya zinthu (ndi zinyalala). Gawo lina la mpweya limasungunuka kuti lipange madzi omwe amakhala ndi mpweya wochuluka. Mpweya wotsalawo umakhala ndi nayitrogeni wambiri ndipo umasungunuka kukhala nayitrogeni wokha (nthawi zambiri <1ppm) mu chosinthira champhamvu (HP). Chosinthira mpweya cha chosinthira ichi chimafuna kuzizira komwe kumapezeka pokulitsa mtsinje wokhala ndi mpweya wochuluka kudutsa valavu kapena kudzera mu Expander, (reverse compressor).

5 Kapenanso, condenser ikhoza kuziziritsidwa posinthana kutentha ndi boiler mu column yothira mpweya wochepa (LP) (yogwira ntchito pa 1.21.3 bar abs.) pamene ASU ikupanga mpweya wokha. Kuti muchepetse mtengo wopondereza, condenser/reboiler yophatikizana ya mizati ya HP/LP iyenera kugwira ntchito ndi kusiyana kwa kutentha kwa madigiri 1-2 a Kelvin okha, zomwe zimafuna zosinthira kutentha za aluminiyamu zokhala ndi plate fin. Ma purification a oxygen nthawi zambiri amakhala pakati pa 97.5% mpaka 99.5% ndipo amakhudza kubwezeretsedwa kwakukulu kwa mpweya. Kuzizira kofunikira popanga zinthu zamadzimadzi kumapezeka pogwiritsa ntchito JT effect mu expander yomwe imapatsa mpweya woponderezedwa mwachindunji ku column yotsika mpweya. Chifukwa chake, gawo lina la mpweya siliyenera kulekanitsidwa ndipo liyenera kuchoka pa column yotsika mpweya ngati mtsinje wotaya zinyalala kuchokera ku gawo lake lapamwamba.

6 Popeza kutentha kwa argon (87.3 K pamlingo woyenera) kuli pakati pa mpweya (90.2 K) ndi nayitrogeni (77.4 K), argon imasonkhana m'chigawo chapansi cha mpweya wochepa. Pamene argon ipangidwa, mpweya wochepa umakokedwa kuchokera ku mpweya wochepa.

Mzere womwe kuchuluka kwa argon kuli kwakukulu. Umatumizidwa ku mzere wina kukonza Argon ku chiyero chomwe madzi amabwerera kumalo omwewo mu mzere wa LP. Kugwiritsa ntchito ma packing amakono omwe ali ndi madontho otsika kwambiri a mphamvu kumapangitsa kuti argon purities ikhale yochepera 1 ppm. Ngakhale kuti argon ilipo mu 1% ya zomwe zikubwera, mzere wa air argon umafuna mphamvu zambiri chifukwa cha kuchuluka kwa reflux komwe kumafunikira (pafupifupi 30) mu mzere wa Argon. Kuziziritsa kwa mzere wa argon kumatha kuperekedwa kuchokera ku madzi ozizira ochulukitsidwa kapena ndi nayitrogeni wamadzimadzi.

7 Pomaliza, zinthu zopangidwa mu mawonekedwe a mpweya zimatenthedwa motsutsana ndi mpweya womwe ukubwera mpaka kutentha kwa malo ozungulira. Izi zimafuna kuphatikiza kutentha kopangidwa mosamala komwe kuyenera kulola kulimba motsutsana ndi zosokoneza (chifukwa cha kusintha kwa ma molecular sefe beds). Zingafunikenso kuzizira kwina kwakunja panthawi yoyambira.