Xa uvelisa initrogen, kubalulekile ukwazi nokuqonda inqanaba lobunyulu obulidingayo.Ezinye izicelo zifuna amanqanaba aphantsi okucoceka (phakathi kwe-90 kunye ne-99%), njengokunyuka kwamaxabiso emali kunye nokuthintela umlilo, ngelixa ezinye, ezifana nezicelo kwishishini lokusela isiselo sokutya okanye ukubunjwa kweplastiki, zifuna amanqanaba aphezulu (ukusuka kwi-97 ukuya kwi-99.999%).Kwezi meko iteknoloji yePSA yeyona ndlela ilungileyo nelula yokuhamba.
Ngokwenyani ijenereyitha yenitrogen isebenza ngokwahlula iimolekyuli zenitrogen kwiimolekyuli zeoksijini ngaphakathi kumoya oxinanisiweyo.I-Pressure Swing Adsorption yenza oku ngokubambisa ioksijini kumsinga womoya ocinezelekileyo usebenzisa i-adsorption.I-Adsorption yenzeke xa iimolekyuli zibophelela kwi-adsorbent, kule meko iimolekyuli ze-oksijini zinamathele kwi-carbon molecular sieve (CMS).Oku kwenzeka kwiinqanawa ezimbini zoxinzelelo ezihlukeneyo, nganye izaliswe yiCMS, etshintshayo phakathi kwenkqubo yokwahlula kunye nenkqubo yokuvuselela.Okwangoku, masibabize ngokuba yinqaba A kunye nenqaba B.
Ukuqala, umoya ococekileyo nowomileyo oxinanisiweyo ungena kwinqaba A kwaye ekubeni iimolekyuli zeoksijini zincinci kuneemolekyuli zenitrogen, ziya kungena kwiipores zekhabhoni yesihluzo.Iimolekyuli zenitrojeni kwelinye icala azinakungena kwiipores ngoko ziya kudlula isihluzo se-Jiuzhou carbon molecular.Ngenxa yoko, ugqiba ekubeni ube ne-nitrogen yobunyulu obufunwayo.Esi sigaba sibizwa ngokuba yi-adsorption okanye isigaba sokwahlula.
Ayipheli apho ke kodwa.Uninzi lwenitrogen eveliswa kwinqaba A iphuma kwinkqubo (ilungele ukusetyenziswa ngokuthe ngqo okanye ukugcinwa), ngelixa inxenye encinci yenitrogen eveliswayo ibhabha iye kwinqaba B kwelinye icala (ukusuka phezulu ukuya ezantsi).Oku kuhamba kuyadingeka ukukhupha i-oksijeni eyayibanjwe kwisigaba sangaphambili se-adsorption senqaba B. Ngokukhupha uxinzelelo kwinqaba B, i-carbon molecular sieves ilahlekelwa amandla abo okubamba i-oxygen molecules.Ziya kuqhawula kwii-sieves kwaye zithathwe ngokukhupha ukuhamba kwe-nitrogen encinci evela kwinqaba A. Ngokwenza oko inkqubo yenza indawo yeamolekyu ze-oksijini ezintsha ukuba zifake kwi-sieves kwisigaba esilandelayo se-adsorption.Le nkqubo siyibiza 'yokucoca' inqaba ezele yioksijini yokuvuselelwa ngokutsha.
Ixesha lokuposa: Apr-13-2022