Dab tsi yog polymers siv los ua Flocculants?

Ib theem tseem ceeb hauv cov txheej txheem kho dej khib nyiab yog coagulation thiab daws cov khib nyiab tshem tawm, ib txoj kev uas feem ntau nyob ntawm cov tshuaj hu ua flocculants. Hauv qhov no, polymers ua lub luag haujlwm tseem ceeb, yog li PAM, polyamines.Cov kab lus no yuav delve rau hauv ntaupolymer flocculants, daim ntawv thov ntawm polymers li flocculants hauv kev kho dej khib nyiab, thiab cov haujlwm tom qab lawv.

Dab tsi yog cov khoom siv polymer flocculants?

Feem ntau siv polymer flocculants suav nrog cationic polymers, anionic polymers thiab nonionic polymers. Cov polymers tuaj yeem tau txais los ntawm cov txheej txheem hluavtaws sib txawv thiab muaj cov qauv sib txawv cationic thiab branched. Hauv kev siv tswv yim, nws yog ib qho tsim nyog los xaiv cov polymer flocculants tsim nyog raws li cov xwm txheej tshwj xeeb ntawm cov dej khib nyiab kom tau txais cov txiaj ntsig zoo tshaj plaws. PAM, polyDADMAC, yog siv dav hauv kev kho dej khib nyiab. Polyacrylamide yog flocculant siv dav hauv ntiaj teb. Cov dej-soluble polymers no yog hluavtaws thiab tuaj yeem tsim kev cai rau kev siv tshwj xeeb los ntawm qhov sib txawv ntawm qhov hnyav molecular, viscosities, cov nqi sib txawv, cov ntaub ntawv sib txawv xws li particles, emulsions, thiab lwm yam. PolyDADMAC yog dav siv hauv cov dej kais dej, dej tsis qab, sludge. Lub cev qhuav dej, kev lag luam ntawv thiab luam ntawv thiab dyeing kev lag luam.

Kev siv flocculants hauv kev kho dej khib nyiab

Lub hom phiaj tseem ceeb ntawm kev kho dej khib nyiab yog tshem tawm cov pa phem xws li cov khib nyiab pov tseg, yaj cov organic teeb meem thiab cov khoom colloidal los ntawm cov dej los txhim kho cov dej zoo. Hauv cov txheej txheem no, flocculants ua lub luag haujlwm tseem ceeb. Los ntawm kev siv flocculants, cov khoom me me thiab cov tshuaj colloidal hauv dej tuaj yeem ua rau agglomerate mus rau hauv cov flocs loj, uas tuaj yeem tshem tau yooj yim dua los ntawm sedimentation lossis pom. Qhov no tuaj yeem tsis tsuas yog txhim kho dej zoo, tab sis kuj txhim kho kev kho mob thiab txo cov nqi kho mob.

Vim li cas Polymers tuaj yeem ua flocculants?

Polymers tuaj yeem siv los ua flocculants feem ntau vim lawv qhov hnyav molecular thiab ntau hom qauv. Cov khoom no tso cai rau cov polymer kom zoo dua adsorb rau cov teeb meem me me, tsim cov flocs loj dua uas tuaj yeem daws tau sai. Tsis tas li ntawd, cov polymers tuaj yeem tshem tawm electrostatic repulsion ntawm cov khoom los ntawm kev them nyiaj nruab nrab, tso cai rau cov khoom mus rau hauv thiab agglomerate ua ke.

Lub mechanism ntawm kev txiav txim ntawm polymers nyob rau hauv kev kho dej khib nyiab

Lub mechanism ntawm kev txiav txim ntawm polymers li flocculants yuav muab faib ua peb kauj ruam: them neutralization, bridging flocculation thiab net capture. Ua ntej, cov polymer tshem tawm cov electrostatic repulsion ntawm cov khoom los ntawm kev them nyiaj nruab nrab, tso cai rau cov khoom mus kom ze. Tom qab ntawd cov polymer txuas cov khoom ua ke los tsim cov flocs loj dua los ntawm kev sib txuas ntawm flocculation. Thaum kawg, cov flocs no tau sib sau ua ke ntxiv thiab nyob hauv dej los ntawm kev ua haujlwm ntawm cov nets.

Cov yam ntxwv cuam tshuam rau kev ua haujlwm ntawm Polymers hauv kev kho cov dej khib nyiab

Muaj ntau yam uas cuam tshuam rau kev ua haujlwm ntawm polymer kev kho cov dej khib nyiab, suav nrog hom polymer, ntau npaum li cas, pH nqi, kub, nplawm nrawm, thiab lwm yam. Ntawm lawv, hom polymer thiab ntau npaum li cas yog ib qho tseem ceeb tshaj plaws. Cov khoom sib txawv ntawm cov polymers muaj cov khoom sib txawv thiab cov khoom hnyav molecular, yog li nws yog ib qho tsim nyog los xaiv cov polymer uas tsim nyog thiab ntau npaum li cas rau cov dej khib nyiab sib txawv kom ua tiav cov txiaj ntsig zoo tshaj plaws. Tsis tas li ntawd, cov yam ntxwv xws li pH tus nqi, qhov kub thiab txias, thiab kev sib tw ceev kuj tseem cuam tshuam rau kev kho mob, thiab qhov kev pom zoo yuav tsum tau txiav txim siab los ntawm kev sim.

Polymers ua lub luag haujlwm tseem ceeb ua flocculants hauv kev kho dej khib nyiab. Kev nkag siab tob txog cov txheej txheem ntawm kev ua thiab kev cuam tshuam ntawm cov polymers tuaj yeem muab kev txhawb nqa theoretical tseem ceeb thiab cov lus qhia tswv yim rau kev ua kom zoo dua cov txheej txheem dej khib nyiab thiab txhim kho kev kho mob. Nyob rau hauv lub neej yav tom ntej, nrog kev txhim kho txuas ntxiv ntawm kev tiv thaiv ib puag ncig thiab kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, nws ntseeg tau tias kev siv cov polymers hauv kev kho dej khib nyiab yuav ua kom dav thiab tob.