1. Phekolo ea pele ea metsi a litlolo
Mekhatlo ea metsi ea tlhaho hangata e na le seretse, letsopa, humus le lintho tse ling tse emisitsoeng le litšila tsa colloidal le libaktheria, li-fungus, algae, likokoana-hloko le likokoana-hloko tse ling, li na le botsitso bo itseng metsing, ke sesosa se ka sehloohong sa ho senyeha ha metsi, 'mala le monko.Lintho tsena tse fetelletseng tsa lintho tse phelang li kena mochineng oa ion, li silafatsa resin, li fokotsa matla a phapanyetsano ea resin, esita le ho ama boleng ba metsi a litšila a tsamaiso ea letsoai.Phekolo ea coagulation, tlhaloso ea ho rarolla le ho hloekisa ke ho tlosa litšila tsena e le morero o ka sehloohong, e le hore litaba tsa taba e emisitsoeng ka metsing li fokotsehe ho feta 5mg / L, ke hore, ho fumana metsi a hlakileng.Sena se bitsoa pheko ea metsi.Ka mor'a ho hloekisoa pele, metsi a ka sebelisoa e le metsi a boiler ha feela matsoai a qhibilihisitsoeng ka metsing a tlosoa ka phapanyetsano ea ion 'me likhase tse qhibilihisitsoeng ka metsing li tlosoa ka ho futhumala kapa ho hloekisa kapa ho foka.Haeba litšila tsena li sa tlosoe pele, phekolo e latelang (desalting) e ke ke ea etsoa.Ka hona, phekolo ea coagulation ea metsi ke sehokelo sa bohlokoa ts'ebetsong ea ho hloekisa metsi.
Ts'ebetso ea ho lokisa esale pele ea setsi sa motlakase oa mocheso ke ka tsela e latelang: metsi a tala → coagulation → pula le ho hlakisoa → tlhoekiso.Li-coagulants tse atisang ho sebelisoa ts'ebetsong ea coagulation ke polyaluminium chloride, polyferric sulfate, aluminium sulfate, ferric trichloride, joalo-joalo Tse latelang haholo-holo li kenyelletsa tšebeliso ea polyaluminium chloride.
Polyaluminium chloride, eo ho thoeng ke PAC, e thehiloe holim'a molora oa aluminium kapa liminerale tsa aluminium e le lisebelisoa tse tala, mocheso o phahameng le khatello e itseng e nang le alkali le aluminium karabelo e hlahisoang ke polymer, lisebelisoa tse tala le ts'ebetso ea tlhahiso e fapane, litlhaloso tsa sehlahisoa ha li tšoane.Foromo ea molek'hule ea PAC [Al2(OH)nCI6-n]m, moo n e ka bang palo e felletseng lipakeng tsa 1 le 5, 'me m ke kakaretso ea cluster 10. PAC e tla ka mefuta e tiileng le e mokelikeli.
2.Coagulation mochine
Ho na le litlamorao tse tharo tsa mantlha tsa li-coagulants ho likaroloana tsa colloidal ka metsing: ho se nke lehlakore ha motlakase, ho koala borokho ba adsorption le ho fiela.Ke efe ho liphello tse tharo tsena e leng eona e ka sehloohong e itšetlehileng ka mofuta le tekanyo ea coagulant, tlhaho le likahare tsa likaroloana tsa colloidal metsing, le pH ea boleng ba metsi.Mokhoa oa ts'ebetso oa polyaluminium chloride o tšoana le oa aluminium sulfate, 'me boitšoaro ba aluminium sulfate metsing bo bolela mokhoa oa Al3 + ho hlahisa mefuta e sa tšoaneng ea hydrolyzed.
Polyaluminium chloride e ka nkuoa e le lihlahisoa tse fapaneng tsa mahareng nakong ea hydrolysis le polymerization ea aluminium chloride ho Al(OH)3 tlasa maemo a itseng.E fumaneha ka ho toba metsing ka mokhoa oa mefuta e sa tšoaneng ea polymeric le A1 (OH) a (s), ntle le ts'ebetso ea hydrolysis ea Al3 +.
3. Lisebelisoa le lintlha tse susumetsang
1. Mocheso oa metsi
Mocheso oa metsi o na le tšusumetso e hlakileng ho phello ea phekolo ea coagulation.Ha mocheso oa metsi o le tlase, hydrolysis ea coagulant e thata haholo, haholo-holo ha mocheso oa metsi o le ka tlase ho 5 ℃, lebelo la hydrolysis le lieha, 'me flocculant e entsoeng e na le sebopeho se hlephileng, metsi a phahameng le likaroloana tse ntle.Ha mocheso oa metsi o le tlase, ho qhibiliha ha likaroloana tsa colloidal hoa ntlafatsoa, nako ea flocculation e telele, 'me sekhahla sa sedimentation se lieha.Lipatlisiso li bontša hore mocheso oa metsi oa 25 ~ 30 ℃ o loketse haholoanyane.
2. pH boleng ba metsi
Ts'ebetso ea hydrolysis ea polyaluminium chloride ke ts'ebetso ea tokollo e tsoelang pele ea H +.Ka hona, tlas'a maemo a fapaneng a pH, ho tla ba le li-intermediates tse fapaneng tsa hydrolysis, 'me boleng bo botle ba pH ba phekolo ea polyaluminium chloride coagulation hangata bo pakeng tsa 6.5 le 7.5.The coagulation effect e phahame ka nako ena.
3. Tekanyo ea coagulant
Ha palo ea coagulant e eketsoang e sa lekana, moferefere o setseng ka har'a metsi a phallang o moholo.Ha chelete e le khōlō haholo, hobane likaroloana tsa colloidal ka metsing li ba le coagulant e feteletseng, thepa ea tefiso ea likaroloana tsa colloidal e fetoha, e leng se etsang hore ho be le masala a mahlahahlaha a litšila a eketseha hape.Ts'ebetso ea coagulation ha se karabelo e bonolo ea lik'hemik'hale, kahoo tekanyo e hlokahalang e ke ke ea khethoa ho ea ka palo, empa e lokela ho khethoa ho latela boleng bo itseng ba metsi ho fumana tekanyo e nepahetseng;Ha boleng ba metsi bo fetoha ka linako tsa selemo, litekanyetso li lokela ho fetoloa ka tsela e nepahetseng.
4. Mokhoa oa ho ikopanya
Ts'ebetsong ea phekolo ea coagulation kapa phekolo e 'ngoe ea pula, haeba ho na le tekanyo e itseng ea seretse ka metsing, phello ea phekolo ea coagulation e ka ntlafatsoa haholo.E ka fana ka sebaka se seholo sa holimo, ka adsorption, catalysis le crystallization core, ho ntlafatsa phello ea phekolo ea coagulation.
Coagulation precipitation ke mokhoa o sebelisoang haholo bakeng sa kalafo ea metsi hajoale.Indasteri ea polyaluminium chloride e sebelisoa e le mokhoa oa ho hloekisa metsi, ka ts'ebetso e ntle ea coagulant, floc e kholo, tekanyo e fokolang, ts'ebetso e phahameng, pula e potlakileng, mefuta e mengata ea ts'ebeliso le melemo e meng, ha e bapisoa le tekanyo ea setso ea flocculant e ka fokotsoa ka 1/3 ~ 1 / 2, litšenyehelo li ka bolokeha 40%.Ha li kopantsoe le ts'ebetso ea sefene se se nang li-valve le sesefa sa khabone se kentsoeng, moferefere oa metsi a tala a fokotsehile haholo, boleng ba litšila ba sistimi ea letsoai boa ntlafala, 'me matla a phapanyetsano ea resin ea letsoai le ona oa eketseha,' me litšenyehelo tsa ts'ebetso lia fokotseha.
Nako ea poso: Mar-22-2024
