Yaya Oxygen PSA Technique ke Aiki?
Matsakaicin motsi adsorption (PSA) samar da iskar oxygen shine fasahar rabuwar iskar gas bisa ka'idar adsorption ta jiki. Yana tsarkake iskar oxygen daga iska ta hanyar zaɓin zaɓi na sieves.
Tushen Ƙa'idar Samar da Oxygen PSA
- Samar da oxygen na PSA yana amfani da bambanci a cikin aikin adsorption na nitrogen da oxygen (a cikin iska) akan simin kwayoyin halitta, da kuma halayyar cewa ƙarfin talla yana canzawa tare da matsa lamba.
- A ƙarƙashin ma'aunin ma'auni, simintin ƙwayoyin ƙwayoyin cuta ya fi dacewa yana haɓaka ɓangaren nitrogen. Ƙarƙashin yanayin matsa lamba, ƙaddamar da nitrogen ya fi girma fiye da ƙarfin talla a ƙananan matsa lamba.
- Kuma ana samun farfadowar desorption na sieve na kwayoyin ta hanyar canza matsa lamba, wato, adsorption mai matsa lamba da decompression desorption, don haka samun iskar oxygen da rabuwar nitrogen.
Zeolite Molecular Sieve A cikin Tsarin Samar da Oxygen
- Babban bangaren tsarin samar da iskar oxygen shine sieve kwayoyin halitta. Kodayake oxygen da nitrogen ba abubuwan polar ba ne, za su samar da dipoles da aka jawo a ƙarƙashin tasirin sieves na kwayoyin zeolite.
- Akwai jan hankali (ƙarfin daɗaɗɗa) tsakanin dipole da aka jawo da kuma ainihin dipole na ƙwayoyin polar. Saboda ƙarfin inductive na nitrogen ya fi na oxygen girma, simintin kwayoyin halitta yana tallata nitrogen fiye da oxygen.
- Lokacin da iska ta ratsa cikin simintin kwayoyin halitta na zeolite, ana fifita nitrogen ta hanyar sieve na kwayoyin kuma ana wadatar da shi a cikin micropores, yayin da karamin adadin iskar oxygen ke tallatawa, kuma yawancinsa yana wucewa ta sieve kwayoyin don zama iskar gas.
Tsarin Aiki Na Samar da Oxygen PSA
- Da farko ana danne iskar da cikakken - na'urar damfara mai aiki kuma ta ratsa ta tacewa da yawa don cire mafi yawan ƙurar ƙura da ƙazanta; sannan ana sanyaya iska mai zafi da na'urar bushewa don cire danshi daga iska; kuma a ƙarshe, yana shiga cikin tankin ajiyar iska don buffering da daidaitawar matsa lamba, kuma ya shiga hasumiya ta adsorption wanda aka sake farfadowa kuma yana cikin yanayin aiki ta hanyar bawul mai sauyawa.
- A cikin hasumiya ta adsorption, nitrogen, carbon dioxide da sauran iskar gas ana haɗa su ta hanyar sieves na ƙwayoyin cuta, kuma ana wadatar da iskar oxygen daga saman hasumiya ta tallan kuma ta shiga cikin tankin ajiyar iskar oxygen. A kan bututun da ke fitowa na tankin buffer oxygen, an samar da tashar samfur don gano tsarkin iskar oxygen. Sannan ana tace iskar oxygen da ta cancanta ta hanyar tace kura da tacewa don samun ingantaccen samfurin{2}} iskar oxygen.
- Domin samun ci gaba da kwanciyar hankali samfurin - iskar oxygen, na'urorin samar da iskar oxygen na PSA an sanye su da aƙalla hasumiya masu tallatawa guda biyu don samar da iskar oxygen a madadin. Lokacin da hasumiya ɗaya ta toshe kuma ta samar da iskar oxygen, ɗayan hasumiya ta adsorption tana cikin yanayin farfadowa, kuma sauran iskar gas ɗin da ake fitar da su ta hanyar sake haɓakawa ana rufe su ta hanyar murfi sannan a fito da su a waje.
