Isebenza njani iPressure Swing Adsorption?
Xa uvelisa eyakho initrogen, kubalulekile ukwazi nokuqonda inqanaba lobunyulu ofuna ukulifikelela.Ezinye izicelo zifuna amanqanaba aphantsi okucoceka (phakathi kwe-90 kunye ne-99%), njengokunyuka kwamaxabiso ethaya kunye nokuthintela umlilo, ngelixa ezinye, ezifana nezicelo kwishishini lokutya kunye nesiselo 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 oxinzelelweyo ungena kwinqaba A kwaye ekubeni iimolekyuli ze-oksijini zincinci kune-nitrogen molecule, ziya kungena kwiipores ze-carbon sieve.Iimolekyuli zenitrojeni kwelinye icala azinakungena kwiipores ngoko ziya kudlula isihluzo se-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.
Okokuqala, itanki A ikwinqanaba le-adsorption ngelixa itanki B ihlaziya.Kwinqanaba lesibini zombini iinqanawa zilinganisa uxinzelelo ukulungiselela ukutshintshwa.Emva kokutshintsha, itanki A iqalisa ukuvelisa ngokutsha ngelixa itanki B ivelisa initrogen.
Ngeli xesha, uxinzelelo kwiinqaba zombini ziya kulinganisa kwaye ziya kutshintsha izigaba ukusuka kwi-adsorbing ukuya kuhlaziyo kwaye ngokuphambene noko.I-CMS kwinqaba A iya kufumana i-saturated, ngelixa i-tower B, ngenxa ye-depressurization, iya kukwazi ukuqalisa kwakhona inkqubo ye-adsorption.Le nkqubo ikwabizwa ngokuba 'yi-swing of pressure' , oku kuthetha ukuba ivumela iigesi ezithile ukuba zibanjwe kuxinzelelo oluphezulu kwaye zikhutshwe kuxinzelelo oluphantsi.Inkqubo ye-PSA yeenqaba ezimbini ivumela ukuveliswa kwenitrogen eqhubekayo kwinqanaba lokucoceka elifunekayo.
Ixesha lokuposa: Nov-25-2021