Isityalo se-ASU sivelisa igesi engamanzi njengamanyathelo asixhenxe alandelayo:

1.Ngaphambi kokuba umoya ucinezelwe, umoya ucocwa ngothuli.

2. Umoya ucinezelwe apho uxinzelelo lokugqibela lokuhambisa lumiselwa zizinto ezifunyenweyo kunye nemeko yolwelo (igesi okanye ulwelo) lweemveliso. Uxinzelelo oluqhelekileyo luphakathi kwe-5 kunye ne-10 bar gauge. Umjelo womoya unokucinezelwa kwiingcinezelo ezahlukeneyo ukuphucula ukusebenza kakuhle kwe-ASU. Ngexesha loxinzelelo amanzi ancitshiswa kwii-coolers eziphakathi kwezigaba.

3. Umoya wenkqubo udla ngokudlula kwibhedi yesihluzo semolekyuli, esusa nawuphi na umphunga wamanzi oseleyo, kunye nekhabhoni diokside, eya kubanda ize ivale izixhobo ze-cryogenic. Ii-molecular seeves zihlala zenzelwe ukususa naziphi na ii-hydrocarbons zegesi emoyeni, kuba ezi zinokuba yingxaki kwi-air distillation elandelayo enokukhokelela ekuqhumeni. Ibhedi yesihluzo semolekyuli kufuneka ivuselelwe. Oku kwenziwa ngokufaka iiyunithi ezininzi ezisebenza ngendlela etshintshanayo kunye nokusebenzisa igesi yenkunkuma eveliswa kunye neyomileyo ukucoca amanzi.

4. Umoya wenkqubo udlula kwi-heat exchanger edibeneyo (ngesiqhelo i-plate fin heat exchanger) uze upholiswe kwi-cryogenic streams yemveliso (kunye nenkunkuma). Inxalenye yomoya iyanyibilika ukuze yenze ulwelo olutyetyiswe yi-oksijini. Igesi eseleyo ityebile kwi-nitrogen kwaye inyibilikiswa ibe yi-nitrogen ecocekileyo (ngesiqhelo < 1ppm) kwikholamu yokunyibilikisa uxinzelelo oluphezulu (HP). I-condenser yale kholamu ifuna ifriji efumaneka ngokwandisa umjelo otyebileyo kwi-oxygen ngakumbi kwi-valve okanye nge-Expander, (i-reverse compressor).

5 Kungenjalo i-condenser ingapholiswa ngokutshintshanisa ubushushu ne-re boiler kwikholamu yokunyibilikisa enoxinzelelo oluphantsi (LP) (esebenza kwi-1.21.3 bar abs.) xa i-ASU ivelisa ioksijini ecocekileyo. Ukunciphisa iindleko zokucinezelwa, i-condenser/reboiler edibeneyo yeekholamu ze-HP/LP kufuneka isebenze ngomahluko wobushushu we-1-2 degrees Kelvin kuphela, ifuna ii-plate fin brazed aluminium heat exchangers. Ii-oxygen purities eziqhelekileyo ziqala kwi-97.5% ukuya kwi-99.5% kwaye zichaphazela ukubuyiswa okuphezulu kweoksijini. Ifriji efunekayo ukuvelisa iimveliso zolwelo ifunyanwa kusetyenziswa i-JT effect kwi-expander enika umoya ocinezelweyo ngqo kwikholamu enoxinzelelo oluphantsi. Ke ngoko, inxalenye ethile yomoya akufuneki yahlulwe kwaye kufuneka ishiye ikholamu enoxinzelelo oluphantsi njengomjelo wenkunkuma ukusuka kwicandelo layo eliphezulu.

6 Ngenxa yokuba iqondo lokubila le-argon (87.3 K kwiimeko eziqhelekileyo) liphakathi kwe-oxygen (90.2 K) kunye ne-nitrogen (77.4 K), i-argon iqokelelana kwicandelo elisezantsi lekholamu yoxinzelelo oluphantsi. Xa i-argon iveliswa, kuthathwa umphunga kwicala loxinzelelo oluphantsi.

Ikholamu apho uxinaniso lwe-argon luphezulu khona. Ithunyelwa kwenye ikholamu ilungisa i-Argon ukuya kubunyulu obufunekayo apho ulwelo lubuyiselwa khona kwindawo enye kwikholamu ye-LP. Ukusetyenziswa kwezixhobo zanamhlanje ezicwangcisiweyo ezine-low pressure drops kwenza i-argon purities ibe ngaphantsi kwe-1 ppm. Nangona i-argon ikhona ngaphantsi kwe-1% yengeniso, ikholamu ye-argon yomoya ifuna amandla amaninzi ngenxa yomlinganiselo ophezulu we-reflux ofunekayo (malunga nama-30) kwikholamu ye-Argon. Ukupholisa ikholamu ye-argon kunokunikezelwa ukusuka kulwelo olubandayo olutyebileyo okanye nge-nitrogen engamanzi.

7 Ekugqibeleni iimveliso eziveliswa ngendlela yegesi ziyafudunyezwa ngokuchasene nomoya ongenayo ukuya kumaqondo obushushu angqongileyo. Oku kufuna ukuhlanganiswa kobushushu okwenziwe ngononophelo okufuneka kuvumele ukuqina ngokuchasene nokuphazamiseka (ngenxa yokutshintsha kweebhedi zesihluzo se-molecular). Kusenokufuna ukupholisa okwangaphandle ngexesha lokuqalisa.