Kwimveliso yezolimo kunye ne-sideline, iwayini, iviniga kunye nesosi yesoya zivundisiwe kwi-starch, yengqolowa.Ukuhluzwa kwezi mveliso yinkqubo ebalulekileyo yokuvelisa, kwaye umgangatho wokucoca uchaphazela ngokuthe ngqo umgangatho weemveliso.Iindlela zokuhluza zesiNtu ziquka intlenge yendalo, i-adsorption esebenzayo, i-diatomite filtration, ipleyiti kunye nefreyimu yokuhluza, njl. Ezi ndlela zokuhluza zineengxaki ezithile kwiinqanaba ezahlukeneyo zexesha, ukusebenza, ukhuseleko lokusingqongileyo kunye neminye imiba, ngoko ke kuyimfuneko ukukhetha ukuhluzwa okuphezulu. indlela.
Ifayibha eHollow inokuthintela izinto ezinkulu zemolekyuli kunye nokungcola phakathi kwe-0.002 ~ 0.1μm, kwaye ivumele izinto ezincinci zemolekyuli kunye neziqina ezinyibilikisiweyo (iityuwa ezingaphiliyo) ukuba zidlule, ukuze ulwelo oluhluziweyo lugcine umbala walo wokuqala, ivumba kunye nencasa, kwaye ufezekise injongo. yokuvala inzala ngaphandle kobushushu.Ke ngoko, ukusebenzisa isihluzo sefayibha engenanto ukucoca iwayini, iviniga, isosi yesoya yeyona ndlela iphambili yokucoca.
I-Polyethersulfone (PES) yakhethwa njengesixhobo se-membrane, kunye ne-membrane ye-fiber ultrafiltration engenanto eyenziwe yale nto inepropathi ephezulu yeekhemikhali, ekwazi ukumelana ne-chlorinated hydrocarbons, i-ketones, i-acids kunye nezinye izinyibilikisi eziphilayo, kwaye zizinzile kwi-acids, iziseko, i-aliphatic hydrocarbons, i-oyile. , utywala kunye nokunye.Uzinzo oluhle lwe-thermal, ukumelana kakuhle nomphunga kunye namanzi ashushu kakhulu (150 ~ 160 ℃), isantya sokuhamba ngokukhawuleza, amandla aphezulu omatshini.I-membrane yokucoca kulula ukuyicoca kunye noxinzelelo lwangaphakathi lwe-fiber membrane, kunye neqokobhe le-membrane, umbhobho kunye nevalve zenziwe nge-304 yensimbi engenasici, ecocekileyo kwaye kulula ukuyicoca.
Iwayini, iviniga, isosi yesoyi ziintlobo ngeentlobo zee-amino acids, iiasidi eziphilayo, iiswekile, iivithamini, izinto eziphilayo ezinjengotywala kunye ne-ester kunye nomxube wamanzi, kwaye yamkele indlela yokuhluza okuhambahambayo, ngokusebenzisa impompo kuya kufuneka ukucoca imibhobho yolwelo kwinwebu yokuhluza, inwebu ehluzwe ulwelo kwimveliso egqityiweyo, hayi ngolwelo ukuya kumbhobho woxinaniso ukubuyela kwindawo enye.
Ngenxa yokukhutshwa kolwelo olugxininisiweyo, amandla amakhulu okucheba anokwakheka kumphezulu we-membrane, ngaloo ndlela kuncitshiswe ngempumelelo ungcoliseko lwe-membrane.Umlinganiselo wesantya sokuhamba kolwelo olugxininisiweyo ukuya kwinqanaba lokuhamba kwemveliso egqityiweyo inokulungelelaniswa ngokwemeko ethile yolwelo oluhluziweyo ukunciphisa ukungcoliseka kwe-membrane, kwaye ulwelo olugxininisiweyo lunokubuyela kwindawo yalo yangaphambili kwaye -faka inkqubo ye-ultrafiltration yonyango lokucoca.
3 Inkqubo yokucoca
Inkqubo yokucoca i-fiber engenanto iyinxalenye ebalulekileyo yokucoca, kuba umphezulu we-membrane uya kugutyungelwa ngokungcola okuhlukeneyo okubanjwe, kwaye imingxuma ye-membrane iya kuvalwa ngokungcola okulungileyo, okuya kuthobisa ukusebenza kokwahlula, ngoko ke. kuyimfuneko ukuhlamba inwebu ngexesha.
Umgaqo wokucoca kukuba ulwelo lokucoca (amanzi acocekileyo aqhele ukuhluzwa) lufakwa umva ngempompo yokucoca ngombhobho ukuya kwinwebu yokucoca ifayibha ukuhlamba ukungcola kudonga lwenwebu, kwaye ulwelo olulahlwayo luyakhutshwa ngokukhutshwa kwenkunkuma. umbhobho.Inkqubo yokucoca yokucoca inokucocwa ngeendlela ezilungileyo nezimbi.
Ukuhlamba okulungileyo (njengokugungxulwa koxinzelelo) indlela ethile ivale ivalve yokuphuma, vula ivalve yokuphuma kwamanzi, impompo iya kuqalisa imveliso ye-membrane yegalelo lolwelo lomzimba, esi senzo senza i-fiber engenanto ngaphakathi nangaphandle koxinzelelo kumacala omabini alinganayo, umahluko woxinzelelo. ukunamathela kukungcola okuxekethileyo kumphezulu wenwebu, ukwandisa itrafikhi kwakhona ukuhlamba umphezulu, ifilimu ethambileyo kumphezulu wenani elikhulu lokungcola kunokususwa.
I-Backwash (i-reverse flushing), indlela ekhethekileyo yokuvala i-valve yokukhupha i-filtrate, uvule ngokupheleleyo i-valve yokukhupha inkunkuma, uvule i-valve yokucoca, uqalise ipompo yokucoca, ulwelo lokucoca kwi-membrane yomzimba, ukususa ukungcola kwi-membrane yodonga lomngxuma. .Xa i-backwashing, ingqalelo kufuneka ihlawulwe kulawulo loxinzelelo lokuhlamba, uxinzelelo lwe-backwashing kufuneka lube ngaphantsi kwe-0.2mpa, ngaphandle koko kulula ukukrazula ifilimu okanye ukutshabalalisa i-bonding surface ye-fiber engenanto kunye ne-binder kunye nokuvuza kwefom.
Nangona ukucoca rhoqo okulungileyo kunye nokubuyisela umva kunokugcina isantya sokucoca i-membrane kakuhle, kunye nokwandiswa kwexesha elisebenzayo lemodyuli ye-membrane, ukungcola kwe-membrane kuya kuba nzima ngakumbi, kwaye isantya sokucoca i-membrane siya kuncipha.Ukuze ufumane kwakhona i-membrane filtration flux, imodyuli ye-membrane kufuneka icocwe ngamachiza.Ukucocwa kweekhemikhali ngokuqhelekileyo kwenziwa nge-asidi kuqala kwaye emva koko i-alkali.Ngokuqhelekileyo, i-2% ye-citric acid isetyenziselwa ukukhethwa, kwaye i-1% ~ 2% ye-NaOH isetyenziselwa ukuhlamba i-alkali.
Ixesha lokuposa: Aug-06-2021