In kev kho dej khib nyiab hauv kev lag luam, kev tshem tawm cov khoom khov uas raug tshem tawm yog qhov txuas tseem ceeb. Qhov no tsis yog tsuas yog pab txhim kho cov dej zoo xwb, nws kuj txo qhov hnav thiab tsim kua muag ntawm cov khoom siv thiab kev txhaws. Tam sim no, cov txheej txheem rau kev tshem tawm cov khoom khov uas raug tshem tawm feem ntau suav nrog kev tso dej tawm, kev lim dej, kev ntab dej thiab kev sib xyaw ua ke. Ntawm lawv, txoj kev sib xyaw ua ke tau siv dav vim nws qhov ua tau zoo thiab kev txuag nyiaj. Hauv txoj hauv kev no, ib qho polymer hu ua PolyDADMAC ua lub luag haujlwm tseem ceeb.
PolyDADMAC, nws lub npe tag nrho yog Poly diallyl dimethyl ammonium chloride, yog ib qho polymer molecular siab. Nws feem ntau yog tsim los ntawm polymerizing diallyldimethylammonium chloride monomer los ntawm kev loj hlob ntawm cov saw hlau polymerization. Qhov kev tshuaj tiv thaiv polymerization no feem ntau yog ua tiav hauv qab catalysis ntawm acid lossis ntsev, thiab tuaj yeem tau txais cov qauv polymer linear. Nws feem ntau yog kua daj lossis dawb rau hmoov daj lossis granules. Nws muaj solubility zoo thiab tuaj yeem sib npaug hauv cov kua dej.
PolyDADMACmuaj qhov ceev ceev thiab feem ntau ua haujlwm zoo li cationic polymer. Qhov no txhais tau tias nws tuaj yeem nqus cov khoom tsis zoo uas raug tshem tawm thiab cov khoom me me hauv dej los tsim cov flocs loj, yog li ua tiav kev tshem tawm cov khoom raug tshem tawm zoo. PolyDADMAC feem ntau siv ua flocculant thiab coagulant thiab siv dav hauv ntau qhov chaw kho dej, suav nrog kev kho dej khib nyiab hauv kev lag luam thiab kev kho dej phwj hauv nroog. Nws tuaj yeem tsim cov flocs loj thiab ntom ntom hauv cov dej khib nyiab thiab tshem tawm cov khoom raug tshem tawm, cov hlau hnyav ions thiab cov pa phem organic.
Hauv kev kho cov dej khib nyiab los ntawm cov nroj tsuag pulp thiab ntawv, cov txheej txheem ua haujlwm ntawm PolyDADMAC feem ntau yog pom tseeb hauv cov hauv qab no:
Kev them nqi neutralization: Vim tias PolyDADMAC muaj qhov ceev ceev, nws tuaj yeem nqus tau sai sai rau cov khoom tsis zoo thiab cov khoom colloidal, ua rau lawv poob kev ruaj khov los ntawm kev them nqi neutralization, thiab tom qab ntawd sib sau ua ke los ua cov flocs ntawm cov khoom loj.
Kev Ua Haujlwm Txhuam: Thaum cov floc raug tsim, nws yuav rub cov khoom khov thiab cov khoom me me hauv cov dej khib nyiab mus rau hauv cov floc, ua tiav kev sib cais ntawm cov khoom khov thiab kua los ntawm kev ua haujlwm lub cev.
Cov nyhuv ntes cov ntaub ntawv hauv lub vas: Cov polymers muaj cov molecular siab tuaj yeem tsim cov qauv network ntom ntom, ntes cov khoom khov thiab cov khoom me me hauv nws zoo li lub vas nuv ntses, yog li ua tiav kev sib cais zoo.
Piv nrog rau lwm txoj kev kho dej khib nyiab, siv PolyDADMAC los kho cov dej khib nyiab ntawm cov ntawv pulp thiab cov ntawv muaj cov txiaj ntsig zoo li nram no:
Qhov ceev ntawm cov nqi hluav taws xob siab: PolyDADMAC qhov ceev ntawm cov nqi hluav taws xob siab ua rau nws nqus tau cov khoom tsis zoo thiab cov khoom me me uas raug tshem tawm, ua rau kev kho mob zoo dua.
Kev hloov pauv tau zoo: PolyDADMAC muaj cov teebmeem kho mob zoo rau ntau hom pulp thiab ntawv pov tseg thiab tsis cuam tshuam los ntawm kev hloov pauv dej zoo.
Kev ua haujlwm zoo thiab kev siv nyiaj tsawg: Siv PolyDADMAC uaCov khoom ua kom cov dej khovthiab coagulant tuaj yeem txo qhov ntau ntawm cov tshuaj, thaum txhim kho kev kho mob thiab txo cov nqi khiav lag luam.
Ib puag ncig zoo: PolyDADMAC yog ib qho cationic polymer. Cov floc tsim tawm tom qab siv tsis yooj yim decompose mus rau hauv cov tshuaj lom neeg thiab yog ib puag ncig zoo.
Xaus lus, PolyDADMAC, ua ib tugCov Polymer Molecular Siab, muaj qhov zoo ntawm kev ua haujlwm zoo, kev siv tsawg, thiab kev phooj ywg ib puag ncig, thiab ua lub luag haujlwm tseem ceeb hauv kev kho cov dej khib nyiab los ntawm cov chaw tsim pulp thiab ntawv. Thaum lub sijhawm uas qhov sib txawv ntawm kev tiv thaiv ib puag ncig nyuaj rau tiv taus, PolyDADMAC yog cov khoom siv tshuaj lom neeg nrov uas ua tau raws li cov yam ntxwv ntawm cov khoom lag luam zoo rau ib puag ncig.
Lub sijhawm tshaj tawm: Cuaj hlis-12-2024