Polyacrylamide(PAM) yog lub siab molecular hnyav polymer dav siv hauv kev kho dej hauv ntau qhov chaw. Nws muaj ntau qhov hnyav molecular, ionicities, thiab cov qauv kom haum rau cov xwm txheej sib txawv thiab tuaj yeem hloov kho rau cov xwm txheej tshwj xeeb. Los ntawm hluav taws xob neutralization thiab polymer adsorption thiab bridging, PAM tuaj yeem txhawb cov agglomeration sai thiab sedimentation ntawm cov khoom raug tshem tawm, txhim kho cov dej zoo. Kab lus no yuav qhia txog cov kev siv tshwj xeeb thiab cuam tshuam ntawm PAM hauv kev kho dej hauv ntau qhov chaw.
Hauv kev kho dej phwj hauv tsev, PAM feem ntau yog siv rau flocculation sedimentation thiab sludge dewatering. Los ntawm neutralizing hluav taws xob cov khoom thiab ua hauj lwm adsorbing bridging teebmeem, PAM tuaj yeem ua kom cov agglomeration ntawm tshem tawm cov khib nyiab hauv dej los ua flocs ntawm cov khoom loj. Cov flocs no yooj yim los daws thiab lim, yog li tshem tawm impurities hauv dej thiab ua tiav lub hom phiaj ntawm purifying dej zoo. Kev siv PAM tuaj yeem txhim kho kev kho dej phwj tuaj thiab txo cov nqi kho mob.
Nyob rau hauv daim ntawv ntawm papermaking, PAM feem ntau yog siv los tuav cov kev pab cuam, lim pab, dispersant, thiab lwm yam. Los ntawm kev ntxiv PAM, qhov tuav tus nqi ntawm cov fillers thiab nplua fibers hauv daim ntawv tuaj yeem txhim kho, txo cov khoom siv raw, thiab txhim kho. lub filterability thiab lub cev qhuav dej ua tau zoo ntawm lub pulp. Tsis tas li ntawd, PAM tuaj yeem ua haujlwm tsis yog-silicon polymer stabilizer hauv cov txheej txheem bleaching, txhim kho cov xim dawb thiab ci ntawm daim ntawv.
Hauv kev kho cov dej khib nyiab,PAMfeem ntau yog siv rau hauv cov txheej txheem sludge dehydration. Rau cov txheej txheem cawv nrog cov khoom sib txawv thiab cov txheej txheem kho dej khib nyiab, nws yog ib qho tseem ceeb uas yuav tau xaiv cationic polyacrylamide nrog ionicity thiab molecular hnyav. Kev xaiv kev sim los ntawm kev sim beaker thwmsim yog ib qho ntawm cov kev siv feem ntau.
Cov dej khib nyiab, nrog rau nws cov organic teeb meem siab thiab cov ntsiab lus raug tshem tawm, yuav tsum muaj txoj kev kho kom tsim nyog. Txoj hauv kev ib txwm muaj nrog lub cev sedimentation thiab biochemical fermentation. Txawm li cas los xij, hauv kev siv tswv yim, polymer flocculants feem ntau tsim nyog rau sludge lub cev qhuav dej thiab lwm yam kev kho mob. Feem ntau ntawm cov flocculants siv nyob rau hauv cov txheej txheem no yog cationic polyacrylamide series khoom. Kev xaiv cov khoom tsim nyog polyacrylamide yuav tsum xav txog qhov cuam tshuam ntawm kev hloov pauv huab cua (kub) ntawm kev xaiv flocculant, xaiv qhov tsim nyog molecular hnyav thiab tus nqi them raws li qhov loj ntawm floc xav tau los ntawm cov txheej txheem kho, thiab lwm yam. Tsis tas li ntawd, yuav tsum tau saib xyuas cov teeb meem xws li cov txheej txheem thiab cov khoom siv thiab kev siv flocculants.
Hauv hluav taws xob thiab electroplating dej khib nyiab, PAM feem ntau yog siv los ua ib qhoFlocculantthiab nag xob nag cua. Los ntawm neutralizing hluav taws xob cov khoom thiab ua hauj lwm adsorbing bridging teebmeem, PAM tuaj yeem sai agglomerate thiab kho cov hlau hnyav ions hauv cov dej khib nyiab. Nyob rau hauv cov txheej txheem no, nws yog feem ntau yuav tsum tau ntxiv sulfuric acid rau cov dej khib nyiab los kho tus nqi pH mus rau 2-3 thiab tom qab ntawd ntxiv ib tug txo tus neeg sawv cev. Hauv cov tshuaj tiv thaiv tom ntej no, siv NaOH lossis Ca (OH) 2 los kho tus nqi pH rau 7-8 los tsim Cr (OH) 3 precipitates. Tom qab ntawd ntxiv cov coagulant rau precipitate thiab tshem tawm Cr (OH) 3. Los ntawm cov txheej txheem kev kho mob no, PAM pab txhim kho kev ua haujlwm ntawm hluav taws xob thiab electroplating dej khib nyiab thiab txo qhov kev puas tsuaj ntawm cov hlau hnyav ions rau ib puag ncig.
Post lub sij hawm: Jun-04-2024