Isitshalo se-ASU sikhiqiza igesi eliwuketshezi njengezinyathelo eziyisikhombisa ezilandelayo:

1. Ngaphambi kokucindezela umoya usuke uhlungiwe ngothuli.

2. Umoya uyacindezelwa lapho ingcindezi yokugcina yokulethwa inqunywa ukubuyiswa kanye nesimo soketshezi (igesi noma uketshezi) lwemikhiqizo. Ingcindezi evamile isukela ku-5 kuya ku-10 bar gauge. Umsinga womoya ungacindezelwa futhi ezingcindezini ezahlukene ukuze kuthuthukiswe ukusebenza kahle kwe-ASU. Ngesikhathi sokucindezela amanzi ayacindezelwa kuma-cooler aphakathi kwezigaba.

3. Umoya wenqubo uvame ukudluliswa ngombhede wesihlungi sama-molecule, osusa noma yimuphi umhwamuko wamanzi osele, kanye ne-carbon dioxide, ozoqandisa futhi uvale imishini ye-cryogenic. Izihlungi zama-molecule zivame ukuklanywa ukususa noma yimaphi ama-hydrocarbon anegesi emoyeni, njengoba lokhu kungaba yinkinga ekuhlanzeni komoya okulandelayo okungaholela ekuqhumeni. Umbhede wezihlungi zama-molecule kumele uphinde uvuselelwe. Lokhu kwenziwa ngokufaka amayunithi amaningi asebenza ngendlela ehlukile futhi asebenzise igesi engcolile ekhiqizwe ndawonye ukuze asuse amanzi.

4. Umoya wenqubo udlula nge-heat exchanger ehlanganisiwe (ngokuvamile i-plate fin heat exchanger) bese upholiswa emifudlaneni ye-cryogenic yomkhiqizo (kanye nemfucuza). Ingxenye yomoya iyancibilika ukuze yakhe uketshezi olucebile nge-oxygen. Igesi esele icebile nge-nitrogen futhi incibilikiswa ibe yi-nitrogen emsulwa (ngokuvamile < 1ppm) kukholomu yokuncibilikisa enomfutho ophezulu (HP). I-condenser yale kholomu idinga ukubanda etholakala ngokwandisa umfudlana ocebile nge-oxygen kakhulu ngaphesheya kwe-valve noma nge-Expander, (i-reverse compressor).

5 Ngaphandle kwalokho i-condenser ingapholiswa ngokushintshanisa ukushisa ne-re boiler kukholomu yokuncibilikisa ephansi (LP) (esebenza ku-1.21.3 bar abs.) lapho i-ASU ikhiqiza i-oxygen emsulwa. Ukuze kuncishiswe izindleko zokucindezela, i-condenser/reboiler ehlanganisiwe yamakholomu e-HP/LP kumele isebenze ngomehluko wokushisa ongu-1-2 degrees Kelvin kuphela, okudinga ama-plate fin brazed aluminum heat exchangers. Ama-oxygen purification ajwayelekile aqala ku-97.5% kuya ku-99.5% futhi athonya ukubuyiselwa okuphezulu kwe-oxygen. Isiqandisi esidingekayo ekukhiqizeni imikhiqizo yoketshezi sitholakala kusetshenziswa umphumela we-JT ku-expander opha umoya ocindezelwe ngqo kukholomu ephansi yokucindezela. Ngakho-ke, ingxenye ethile yomoya akufanele ihlukaniswe futhi kumele ishiye ikholomu ephansi yokucindezela njengomfula ongcolile ovela engxenyeni yayo ephezulu.

6 Ngenxa yokuthi iphuzu lokubila le-argon (87.3 K ezimweni ezijwayelekile) liphakathi kwele-oxygen (90.2 K) ne-nitrogen (77.4 K), i-argon iyanda engxenyeni engezansi yekholomu yokucindezela okuphansi. Lapho kukhiqizwa i-argon, kuthathwa ukudonsa ohlangothini lomhwamuko kusuka ekucindezelweni okuphansi.

Ikholomu lapho ukuhlushwa kwe-argon kuphakeme kakhulu. Ithunyelwa kwenye ikholomu ukulungisa i-Argon ibe msulwa oyifunayo lapho uketshezi lubuyiselwa khona endaweni efanayo kukholomu ye-LP. Ukusetshenziswa kwama-packing ahlelekile anamuhla anokwehla kwengcindezi okuphansi kakhulu kwenza i-argon purities engaphansi kwe-1 ppm. Nakuba i-argon ikhona ngaphansi kwe-1% ye-input, ikholomu ye-argon yomoya idinga inani elikhulu lamandla ngenxa yesilinganiso esiphezulu se-reflux esidingekayo (cishe ama-30) kukholomu ye-Argon. Ukupholisa ikholomu ye-argon kunganikezwa kusuka kuketshezi olubandayo olunothile noma nge-nitrogen ewuketshezi.

7 Ekugcineni imikhiqizo ekhiqizwe ngesimo segesi ifudunyezwa ngokumelene nomoya ongenayo kuya emazingeni okushisa azungezile. Lokhu kudinga ukuhlanganiswa kokushisa okuklanywe ngokucophelela okumele kuvumele ukuqina ngokumelene nokuphazamiseka (ngenxa yokushintsha kwemibhede yesihlungo sama-molecule). Kungadinga futhi ukubanda kwangaphandle okwengeziwe ngesikhathi sokuqalisa.