Polyaluminium chloride (PAC)
Polyaluminium chloride (PAC), hu ua Polyaluminum rau luv, poly txhuas chloride dosing hauv kev kho mob hauv dej, muaj tshuaj lom neeg al₂cln (Oh) ₆-n. Polyaluminium chloride coagulant yog ib qho kev kho mob polymer polymer uas tsim los ntawm cov nyhuv bridging ntawm hydroxide ions thiab polymerization ntawm polyvalent anions. Poly Aluminium chloride PAC tuaj yeem faib ua cov khoom thiab kua hauv daim ntawv. Khoom tawv xim Polyaluminum daj, grey-ntsuab, xim av xim av xim av. PAC cov kua yog yooj yim cuam tshuam los ntawm cov dej noo thiab yog yooj yim soluble hauv dej. Cov txheej txheem hydrolysis yog nrog cov txheej txheem ntawm lub cev thiab tshuaj lom neeg xws li electrochemistry, agglutination, kos npe, thiab nag lossis daus, thiab muaj zog bridging cov khoom.
1. Mechanism ntawm Kev Ua
Cov tshuaj aqueous ntawm pac tshuaj yog ib cov khoom siv hydrolypees ntawm cov fecl₃ thiab al (Oh), yog li nws muaj kev ua tiav lub hom phiaj ntawm cov khib nyiab tshem tawm hauv dej.
2. Cov khoom nta
● Polyaluminium chloride yog chiv tsis ruaj khov nyob rau hauv chav tsev kub, thiab yuav tsis tsis zoo tom qab lub sij hawm ntev cia. Cov khoom loj polyaluminum yooj yim nqus dej noo, tab sis tsis ua kom tsis zoo, thiab tsis muaj tshuaj lom thiab tsis muaj mob.
● Tus nqi sam ntawm cov dej uas haum tau yog 4-14, tab sis tus nqi PHU ntawm kev kho mob zoo tshaj yog 6-8.
●xy aluminium chloride hmoov muaj cov yam ntxwv ntawm cov khoom siv me me, cov haujlwm qis, cov haujlwm yooj yim, muaj kev lag luam thoob plaws thiab kev ua haujlwm qis.
Polyacrylamide (Pam)
Polyacrylamide (PAM) / nocon polyacrylamide / cation polyacrylamide / ionic polyacrylamide, Kev kho cov dej ntws hauv cov dej, polyacrylamide thiab tuaj yeem faib ua kom sib tov ntawm cov kua: anionic, cationic, customeric thiab amphoteric cov khoom lag luam.
Polyacrylamide yog ib qho dawb hmoov particle, uas tuaj yeem ua feem ntawm cov zauv uas muaj feem cuam tshuam nrog kev nce ntawm cov neeg txheeb ze ntawm cov polymer. Pam yog insoluble nyob rau hauv feem ntau cov kuab tshuaj hauv cov organic, xws li formaldehyde, ethanol, acetone, ether, etc.
1. Mechanism ntawm Kev Ua
Polyacrylamide yog dej-soluble polymer lossis polyelectrolyte. Muaj qee cov pawg ntawm cov pawg ua ke hauv qab roob molecular, uas tuaj yeem tshem tawm cov khoom hauv qab, yog li ntawd cov me nyuam tuaj yeem ua kom muaj cov flocs loj. Yog li ntawd, polyacrylamide tuaj yeem nrawm cov khib nyiab tshem tawm. Lub sedimentation ntawm nruab nrab cov lus muaj cov txiaj ntsig pom tseeb ntawm kev ua kom pom tseeb qhov tseeb ntawm kev daws teeb meem thiab kev txhawb nqa kom pom kev.
2. Sau ntawv
Polyacrylamide muaj cov tshuaj lom tsis tau muaj kuab lom acrylamide monomer. Hauv kev haus dej haus rau cov dej hauv kuv lub teb chaws, qhov nyiaj pub tshaj plaws yog 0.01mg / l. Txhawm rau tiv thaiv qhov kev cuam tshuam ntawm polyacrylamide, qhov chaw cia kub ntawm nws cov kua aqueous yuav tsum tau tswj tsis tau kom siab dua 40 ° C. Txhawm rau tiv thaiv kev ua tshav ntuj, xws li sodium thiocyanate, sodium nitrite, thiab muaj peev xwm ntxiv rau kev daws. Polyacrylamide cov hmoov hmoov yuav tsum tau ntim rau hauv cov nruas nruas nrog polyethylene ntim lossis muab ntim rau kom tiv thaiv kom muaj cov av noo siab.
Ua kua ua kua polyacrylamide yuav tsum tau ntim thiab tom qab ntawd muab tso rau hauv cov ntoo ntoo lossis hlau ntoo. Lub sijhawm khaws cia yog li 3 txog 6 hlis. Nws yuav tsum tau do ua ntej siv. Qhov ntsuas kub yuav tsum tsis siab tshaj 32 ° C thiab qis dua 0 ° C.
Kev Txiav Txim ntawm Flocculation Cov Phem ntawm PAC thiab PAM
| Etus ceevItem | Noj tshuaj tsuas yog nrog pac | PAC + PAM |
| Cov flocs yog me me, tab sis ywj pheej thiab hnav khaub ncaws | Qhov tsim nyog noj tshuaj | Cov kev ntsuas dosing ntawm PAC thiab Pam tsis tsim nyog, thiab cov tshuaj piv txwv tsis tsim nyog yuav tsum tau kho.Nws hauv qab-dosing ntawm PAC |
| Coarse flocs, sib quas dej ua kom turbidity | Overdose ntawm pac | Tsis txaus dosing ntawm Pam |
| Coarse flocs, cov dej sib txawv yog qhov tseeb | Qhov tsim nyog noj tshuaj | Qhov tsim nyog noj tshuaj |
| Floc muaj qhov tshwm sim ntawm dai ntawm phab ntsa ntawm lub beaker | Pom tsis tau | Overdose ntawm PAM |
| Kua qib scum | Pom tsis tau | Overdose ntawm pac |
| Ntxhib sediment, ntshiab supernatant | Qhov tsim nyog noj tshuaj | Qhov tsim nyog noj tshuaj |
| Nag los yog ntxhia thiab cov supernatant yog huab | Tejzaum nws tsis txaus Pac Dosing | Tsis txaus pam dosing lossis tsis tsim nyog txhaj tshuaj piv ntawm PAC thiab PAM |
| Nag los yog me me thiab tus supernatant yog tseeb | Qhov tsim nyog noj tshuaj | Qhov tsim nyog noj tshuaj |
| Nag lossis nag los yog zoo thiab tus supernatant yog huab | Tsis txaus dosing ntawm pac | Tsis txaus dosing ntawm Pam |
"Peb muab cov khoom noj khoom haus thiab cov neeg muab khoom sib xyaw. Tam sim no peb muaj peb cov chaw tsim khoom thiab cov haujlwm ntawm cov dej. Peb muaj peev xwm muab rau koj yuav luag txhua hom khoom, zoo ib yam li peb xaiv cov tshuaj rau Tuam Tshoj cov hmoov av / polyacrylamide hmoov, thiab peb muaj cov kws tshaj lij kev ua haujlwm thoob ntiaj teb. Peb tuaj yeem daws koj cov teeb meem. Peb tuaj yeem muab cov khoom koj xav tau. Thov koj xav tiv tauj peb.
"Peb yuav ua txhua yam haujlwm thiab kev ua haujlwm nyuaj thiab ua kom peb cov txuj ci zoo tshaj plaws rau kev sawv lub ntiaj teb ua haujlwm zoo siab: Kev lag luam qib Flocculant polyacrylamid cationic coagulant Pam hmoov, peb txais tos cov kev ua neej tshiab thiab muaj kev sib cuag ntev rau peb Kev sib cuam tshuam thiab kev sib nrig sib ua tau zoo!
Lub Sijhawm Post: Mar-11-2022