Mfundo yogwirira ntchito ya Diatomite Filter Aid
Ntchito ya fyuluta yothandizira ndikusintha momwe tinthu tating'onoting'ono timasonkhanitsirana, motero kusintha kukula kwa tinthu tating'onoting'ono mu filtrate. Diatomite Filter Aida makamaka imapangidwa ndi SiO2 yokhazikika m'mankhwala, yokhala ndi ma micropores ambiri amkati, ndikupanga ma framework osiyanasiyana olimba. Panthawi yosefera, dziko lapansi la diatomaceous limapanga choyamba chothandizira fyuluta (pre coating) pa mbale yosefera. Filtrate ikadutsa mu fyuluta yothandizira, tinthu tating'onoting'ono tomwe timayimitsidwa timapanga mawonekedwe ophatikizika, ndipo kugawa kwa kukula kumasintha. Zonyansa za tinthu tating'onoting'ono timagwidwa ndikusungidwa pamwamba pa chosungira, ndikupanga gawo lopapatiza logawa kukula. Zimapitiriza kutseka ndikugwira tinthu tating'onoting'ono tofanana, pang'onopang'ono kupanga keke yosefera yokhala ndi ma pores enaake. Pamene kusefera kukupita patsogolo, zonyansa zokhala ndi tinthu tating'onoting'ono zimalowa pang'onopang'ono mu chothandizira fyuluta ya diatomaceous earth filter ndipo zimagwidwa. Popeza dziko lapansi la diatomaceous lili ndi ma porosity a pafupifupi 90% komanso malo akuluakulu apadera, tinthu tating'onoting'ono ndi mabakiteriya akalowa m'ma pores amkati ndi akunja a fyuluta yothandizira, nthawi zambiri amatsekedwa chifukwa cha kulowetsedwa ndi zinthu zina, zomwe zimatha kuchepetsa 0.1 μ. Kuchotsedwa kwa tinthu tating'onoting'ono ndi mabakiteriya kuchokera ku m kwapangitsa kuti pakhale zotsatira zabwino zosefera. Mlingo wa fyuluta yothandizira nthawi zambiri umakhala 1-10% ya unyinji wolimba womwe wachotsedwa. Ngati mlingowo ndi wokwera kwambiri, udzakhudza kwambiri liwiro la kusefera.
Zotsatira zosefera
Kusefa kwa Diatomite Filter Aid kumachitika makamaka kudzera mu zochita zitatu izi:
1. Zotsatira za kuwunikira
Izi ndi zotsatira zosefera pamwamba, pomwe madzi akamayenda kudzera mu nthaka ya diatomaceous, ma pores a nthaka ya diatomaceous amakhala ang'onoang'ono kuposa kukula kwa tinthu tating'onoting'ono ta tinthu tating'onoting'ono, kotero tinthu tating'onoting'ono sitingadutse ndipo timagwidwa. Izi zimatchedwa sieving. Ndipotu, pamwamba pa keke yosefera imatha kuonedwa ngati pamwamba pa sieve yokhala ndi kukula kofanana kwa avareji ya ma pore. Pamene kukula kwa tinthu tating'onoting'ono sikuchepera (kapena kocheperako pang'ono) kukula kwa ma pore a nthaka ya diatomaceous, tinthu tating'onoting'ono "tidzachotsedwa" kuchokera mu suspension, zomwe zimagwira ntchito pakusefera pamwamba.
2. Kuzama kwa mphamvu
Kuzama kwa madzi ndi momwe kusefera kwakuya kumasungidwira. Mu kusefera kwakuya, njira yolekanitsira imachitika mkati mwa chosungiramo madzi chokha. Tinthu tina tating'onoting'ono tosayera tomwe timadutsa pamwamba pa keke ya fyuluta timatsekedwa ndi njira zozungulira za microporous mkati mwa dziko lapansi la diatomaceous ndi pores tating'ono mkati mwa keke ya fyuluta. Tinthu tating'onoting'ono timeneti nthawi zambiri timakhala tating'ono kuposa micropores mu dziko lapansi la diatomaceous. Tinthu tating'onoting'ono tikagundana ndi khoma la njira, n'zotheka kuchoka pamadzi oyenda. Komabe, ngati tingakwaniritse izi zimadalira mgwirizano pakati pa mphamvu ya inertial ndi kukana kwa tinthu tating'onoting'ono. Kuchita izi koletsa ndi kuwunikira ndi kofanana ndipo kumagwirizana ndi ntchito yamakina. Kuthekera kosefera tinthu tating'onoting'ono tolimba kumangogwirizana ndi kukula ndi mawonekedwe a tinthu tating'onoting'ono ndi pores.
3. Mphamvu ya kulowetsedwa kwa madzi
Zotsatira za kulowetsedwa kwa madzi ndi zosiyana kwambiri ndi njira ziwiri zosefera zomwe zatchulidwa pamwambapa, ndipo zotsatira zake zitha kuonedwa ngati kukoka kwa electrokinetic, komwe kumadalira kwambiri mawonekedwe a pamwamba pa tinthu tolimba ndi dziko lapansi lokhalo la diatomaceous. Tinthu tating'onoting'ono timene tili ndi ma pores ang'onoang'ono mkati tikagundana ndi pamwamba pa dziko lapansi lokhala ndi ma pores ang'onoang'ono a diatomaceous, timakokedwa ndi ma charges otsutsana kapena kupanga magulu a unyolo kudzera mu kukoka pakati pa tinthu ndi kumamatira ku dziko lapansi la diatomaceous, lomwe lonse ndi la kulowetsedwa kwa madzi. Zotsatira za kulowetsedwa kwa madzi zimakhala zovuta kwambiri kuposa ziwiri zoyambirira, ndipo nthawi zambiri amakhulupirira kuti chifukwa chomwe tinthu tating'onoting'ono tokhala ndi ma pore diameters ang'onoang'ono timatsekeredwa makamaka chifukwa cha:
(1) Mphamvu zapakati pa mamolekyulu (zomwe zimadziwikanso kuti van der Waals attraction), kuphatikizapo kuyanjana kwa dipole kosatha, kuyanjana kwa dipole komwe kumayambitsa, ndi kuyanjana kwa dipole nthawi yomweyo;
(2) Kukhalapo kwa Zeta potential;
(3) Njira yosinthira ma ion.
Nthawi yotumizira: Epulo-01-2024