Ndi zida ziti mwa 5 za nembanemba ya reverse osmosis zomwe simukuzidziwa?

01

Cellulose acetate membrane (CA membrane sheet)

Cellulose acetate ndi tinthu tating'ono toyera kapena ufa wonyezimira, wopanda fungo, wopanda poizoni, wosasunthika, komanso wa hygroscopic. Pakali pano ndi zinthu zomwe zimaphunziridwa kwambiri reverse osmosis membrane. Ngakhale cellulose acetate ndi zinthu zabwino nembanemba, the - COOR mu unyolo wake molekyulu imapangitsa kukhala kosavuta hydrolyze pansi pa kutentha kwambiri ndi acid-base mikhalidwe, ndi zamchere kapena acidic hydrolysis kungachititse kuti acetyl gulu kutha. Chifukwa chake, kugwiritsa ntchito zida zoyera za CA kumakhala ndi malire ena.

02

Aromatic polyamide film (PA membrane sheet)

Ma polyamide onunkhira amagwiritsidwa ntchito kwambiri pamakampani a nembanemba chifukwa cha kukhazikika kwawo kwakuthupi komanso kwamankhwala, kukana ma alkali amphamvu, esters yamafuta, zosungunulira organic, komanso mphamvu zamakina. Komabe, chifukwa cha kuchuluka kwa ma nembanemba a PA omwe amagwira ntchito pa pH 6-10, tinthu tating'onoting'ono tamadzi timakonda kuyika pamwamba pa nembanemba, ndikuchepetsa moyo wake wautumiki.

03

Chitosan membrane (CS membrane sheet)

Chitosan (CS) imapezeka pochotsa magulu a acetyl kuchokera ku mamolekyu a chitosan. Ili ndi magwero osiyanasiyana, mawonekedwe abwino opanga mafilimu ndi biocompatibility, ndipo ndi yosavuta kusintha mankhwala. Chifukwa cha kapangidwe kake ka mamolekyu, madzi oyera omwe amagwiritsidwa ntchito mu reverse osmosis amatha kupanga zomangira zolimba za haidrojeni ndi mamolekyu amadzi, ndipo kuthekera kwake kuchotsa ayoni azitsulo zamchere ndi amphamvu. Chifukwa chake, ndipamwamba kuposa ma membrane a CA ndi nembanemba ya polyamide ndipo imawonedwa ngati chinthu chodalirika kwambiri, chomwe chalandira chidwi padziko lonse lapansi. Cs reverse osmosis nembanemba imakhala ndi kusinthasintha kwakukulu komanso kusankha, ndipo imakhala ndi zotsatira zabwino zochotsa pa mchere wazitsulo wa divalent. Chifukwa cha kulimba kwake kwa alkali komanso kukana kwa asidi pambuyo pa kuphatikizika, ma membrane a Cs sangathe kuberekanso tizilombo toyambitsa matenda ndipo nthawi zambiri amagwiritsidwa ntchito ngati nembanemba ya reverse osmosis pofewetsa madzi olimba.

04

Polyphenylene reverse osmosis membrane

Zida za polyphenylene monga polybenzimidazole (PBD) ndi polyphenylene oxide (PPO) zakopanso chidwi chambiri chifukwa cha kukana kwawo kutentha kwambiri, kukana kwa asidi ndi alkali, ndipo zitha kusinthidwa kuti zipeze zida zamakanema zoonda bwino.

05

Ma membrane ena a reverse osmosis

Nembanemba ya composite reverse osmosis ndi mtundu wa nembanemba womwe umaphatikiza chowonda, chowundana cha zinthu zosiyanasiyana ndi ntchito zolekanitsa zapadera pagawo lothandizira porous. Ili ndi kuchuluka kolekanitsa kwamadzi komanso kulowetsedwa kwamadzi kuposa ma membrane ophatikizika, chifukwa chake ili ndi gawo la msika lopitilira 90%. Pakadali pano, ma membrane a reverse osmosis agwiritsidwa ntchito kwambiri m'magawo monga petrochemicals, zamagetsi, nsalu, mafakitale opepuka, zitsulo, mankhwala, biotechnology, chakudya, ndi kuteteza chilengedwe.