Vim li cas thiaj xaiv Polyaluminium Chloride rau Kev Kho Dej

Kev kho dej yog ib feem tseem ceeb ntawm kev tiv thaiv ib puag ncig thiab kev noj qab haus huv rau pej xeem, thiab nws lub hom phiaj yog ua kom cov dej nyab xeeb thiab ua tau raws li cov kev xav tau ntawm ntau yam kev siv. Ntawm ntau txoj kev kho dej,polyaluminium chloride(PAC) tau xaiv dav rau nws cov khoom tshwj xeeb thiab cov txiaj ntsig zoo coagulation.

Cov nyhuv coagulation zoo: PAC muaj kev ua haujlwm zoo coagulation thiab tuaj yeem tshem tawm cov impurities xws li tshem tawm cov khib nyiab, colloids thiab insoluble organic teeb meem hauv dej thiab txhim kho cov dej zoo.

Coagulation mechanism ntawm PAC

Lub mechanism ntawm polyaluminium chloride (PAC) raws li ib tug coagulant feem ntau muaj xws li compression ntawm hluav taws xob ob txheej, them neutralization thiab net trapping. Compression ntawm ob txheej hluav taws xob txhais tau hais tias tom qab ntxiv PAC rau dej, txhuas ions thiab chloride ions tsim ib txheej adsorption ntawm cov colloidal hais, yog li compressing ob txheej hluav taws xob nyob rau saum npoo ntawm colloidal hais, ua rau lawv destabilize thiab condense; adsorption bridging yog Cov cations nyob rau hauv PAC molecules nyiam ib leeg thiab cov nqi tsis zoo nyob rau saum npoo ntawm cov khoom colloidal, tsim ib qho "choj" qauv los txuas ntau yam colloidal hais; Netting nyhuv yog los ntawm adsorption thiab bridging nyhuv ntawm PAC molecules thiab cov colloidal hais, uas nets cov colloidal hais. Ncua nyob rau hauv ib tug network ntawm coagulant molecules.

Polyaluminium chloride kev kho dej siv

Piv nrog rau cov inorganic flocculants, nws tau txhim kho cov nyhuv decolorization ntawm dyes. Nws cov txheej txheem ntawm kev ua haujlwm yog tias PAC tuaj yeem txhawb cov dye molecules los tsim cov flocs zoo los ntawm kev compression lossis nruab nrab ntawm cov hluav taws xob ob txheej.

Thaum PAM siv ua ke nrog PAC, cov anionic organic polymer molecules tuaj yeem siv cov kev cuam tshuam ntawm lawv cov saw ntev molecular los tsim cov flocs tuab nrog kev koom tes ntawm tus neeg sawv cev destabilizing. Cov txheej txheem no pab txhim kho cov nyhuv daws teeb meem thiab ua rau cov hlau hnyav ions tshem tawm yooj yim dua. Tsis tas li ntawd, ntau pawg amide muaj nyob rau hauv cov saw hlau ntawm anionic polyacrylamide molecules tuaj yeem tsim cov ntawv cog lus ionic nrog -SON hauv cov xim molecules. Qhov tsim ntawm daim ntawv cog lus tshuaj no txo ​​cov solubility ntawm cov organic flocculant hauv dej, yog li txhawb kev tsim sai thiab nag lossis daus ntawm flocs. Qhov sib sib zog nqus binding mechanism ua rau nws nyuaj rau hnyav hlau ions kom dim, txhim kho kev ua tau zoo thiab cov nyhuv ntawm kev kho mob.

Hais txog kev tshem tawm phosphorus, qhov ua tau zoo ntawm polyaluminium chloride tsis tuaj yeem raug ignored. Thaum ntxiv rau cov dej khib nyiab uas muaj phosphorus, nws tuaj yeem hydrolyze los tsim trivalent txhuas hlau ions. Cov ion no khi rau cov phosphate soluble hauv cov dej khib nyiab, hloov cov tom kawg mus rau hauv cov dej tsis muaj phosphate precipitates. Cov txheej txheem hloov dua siab tshiab no zoo tshem tawm phosphate ions los ntawm cov dej khib nyiab thiab txo qhov cuam tshuam tsis zoo ntawm phosphorus rau hauv dej.

Ntxiv nrog rau cov tshuaj tiv thaiv ncaj qha nrog phosphate, cov nyhuv coagulation ntawm polyaluminum chloride tseem ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tshem tawm phosphorus. Nws tuaj yeem ua tiav adsorption thiab bridging los ntawm compressing txheej txheej ntawm phosphate ions. Cov txheej txheem no ua rau cov phosphates thiab lwm yam kuab paug nyob rau hauv cov dej khib nyiab sai sai coagulate rau hauv clumps, tsim flocs uas yooj yim rau kev daws.

Qhov tseem ceeb tshaj, rau cov nplua granular tshem tawm cov khib nyiab uas tsim tom qab ntxiv phosphorus tshem tawm tus neeg sawv cev, PAC siv nws qhov tshwj xeeb net-catching mechanism thiab muaj zog nqi neutralization nyhuv los txhawb kev loj hlob zuj zus thiab thickening ntawm cov khib nyiab no, thiab tom qab ntawd condense, aggregate, thiab flocculate rau hauv. cov khoom loj dua. Cov khoom no ces nyob rau hauv qab txheej, thiab los ntawm cov kua-kua sib cais, cov kua supernatant tuaj yeem tso tawm, yog li ua tiav cov phosphorus tshem tawm. Cov txheej txheem ntawm cov txheej txheem ntawm lub cev thiab tshuaj lom neeg ua kom muaj txiaj ntsig thiab kev ruaj ntseg ntawm kev kho dej khib nyiab, muab kev lav zoo rau kev tiv thaiv ib puag ncig thiab kev siv dej rov qab.