Polyacrylamideyog ib feem siv tau ntxiv hauv cov ntawv kev lag luam. Polyacrylamide (PAM), raws li dej-soluble polymer, muaj flocculation zoo, thickening, dispersion thiab lwm yam khoom. Yuav siv rau ntau cov txheej txheem sib txawv nrog cov haujlwm sib txawv. Nyob rau hauv lub papermaking kev lag luam, Pam ua lub luag haujlwm tseem ceeb. Nws tau nqa cov kev pab nyiaj txiag tseem ceeb rau kev lag luam papermaking los ntawm kev txhim kho cov khoom ntawm pulp thiab nce cov haujlwm ua haujlwm ntawm cov ntawv machine. Kab lus no yuav tham txog cov ntawv thov ntawm polyacrylamide hauv cov ntawv ntawv thiab nws cov nyhuv ntawm kev txhim kho kev ua tau zoo.
Cov Khoom Yooj Yim thiab Cov Haujlwm Ntawm Polyacrylamide
Polyacrylamide yog cov molecular siab polymer uas tuaj yeem faib ua cov hom tsis yog, hom khoom thiab amdoteric raws li nws cov nqi. Thaum pam yaj dissolves hauv dej, thiab nws cov qauv molecular ntev ua rau nws muaj cov haujlwm zoo xws li flocculation, kev pab ua kom tuab, thiab kev pab cuam. Hauv kev lag luam ntawv, polyacrylamide feem ntau yog siv nyob rau hauv cov hauv qab no:
1. Kev Noj Qab Haus Ceev:
Pam molecules muaj cov saw hlau ntev ntev thiab tuaj yeem adsorbed nyob rau saum npoo ntawm fibers thiab fillers los ua choj. Li no txhim kho tus nqi khaws cia ntawm cov puv tsev thiab cov fibers rau ntawm daim ntawv web. Txo cov dej dawb hauv dej dawb thiab txo qis cov khoom siv raw. Los ntawm kev nce tus nqi khaws cia ntawm cov foob thiab cov fibers, daim ntawv, daim ntawv lub cev muaj zog xws li smoothness, luam tawm tuaj yeem hloov kho.
2. Kev pab lim:
Txhim kho qhov ua tau zoo ntawm pulp, ua kom cov txheej txheem dej pom kev thiab kev siv hluav taws xob.
3. Flocculant:
Ua kom nrawm sludge lub cev qhuav dej: PAM muaj peev xwm floccully me fibers, fillers thiab lwm yam kev tshem tawm loj hauv partocs, nrawm sludge kev daws teeb meem thiab txo tus nqi qis.
Txhim kho cov khib nyiab dej zoo: PAM tau txais txiaj ntsig zoo tshem tawm cov khib nyiab thiab cov organic nyob rau hauv dej thiab cov cim hauv cov dej huv, txhim kho cov pa dawb huv.
4. Dispersant:
Tiv thaiv fiber ntau agglomeration: PAM tuaj yeem tiv thaiv fiber ntau agglomeration hauv pulp, txhim kho kev hnav khaub ncaws, thiab txhim kho cov ntawv zoo.
Daim ntawv thov polyacrylamide nyob rau hauv papermaking technology
1. Pulp Npaj Kev Npaj
Thaum lub sij hawm pulp npaj npaj, nplua fibers thiab fillers tau yooj yim ploj nrog cov dej khib nyiab, ua rau cov khoom qias neeg thiab ib txwm muaj pa paug. Kev siv cov cationic polyacrylamide ua cov kev pab tsis tau muaj peev xwm ua tau zoo thiab txhim kho cov nplais me me thiab muab cov nplais me me thiab ua kom tiav ntawm kev faib tawm thiab cov nkauj tawg. Qhov no tsis tsuas yog txo qis qhov poob ntawm cov fibers, tab sis kuj txo cov chaw thau khoom ntawm kev lim dej.
2. Ntawv Tshuab ntub dej xaus system
Hauv cov ntawv tshuab ntub xaus system, lub cev qhuav dej ceev yog tus yuam sij rau kev txhim kho kev ua tau zoo. Anionic lossis noionic polyacrylamide tuaj yeem siv los ua cov kev pab lim kom nws khiav tawm ntawm cov qauv fiber network los ntawm kev txhim kho flocculation ntawm fibers. Cov txheej txheem no tau ua kom muaj lub sijhawm ua kom sov lub cev qhuav thaum lub sijhawm noj hluav taws xob thaum ziab theem.
3. Papermaking Theem
Raws li cov neeg dispersant, polyacrylamide tuaj yeem tiv thaiv cov flocculation thiab txhim kho kev hnav khaub ncaws thiab nto smoothness ntawm daim ntawv. Los ntawm ua tib zoo xaiv cov molecular hnyav thiab them nqi zog ntawm cov ntawv, xws li tensile lub zog thiab rhuav lub zog, tseem tuaj yeem kho tau zoo. Tsis tas li ntawd, polyacrylamide tseem tuaj yeem txhim kho cov kev ua kom zoo ntawm coated ntawv thiab ua luam ntawv luam ntawv zoo dua.
Cov ntsiab lus tseem ceeb ntawm polyacrylamide hauv kev txhim kho kev ua tau zoo
1. Txo cov khoom siv raw
Kev siv ntawm cov kev ua tsis tau zoo txhim kho cov nqi ua kom zoo ntawm cov roj ntsha thiab cov xaig roj av, txo cov nqi ntau dua.
2. Ceev txog cov txheej txheem lub cev qhuav dej
Cov lus qhia txog cov lim pab ua rau cov txheej txheem dewatering ntau dua, yog li nce cov ntawv tshuab kev khiav hauj lwm nrawm thiab luv luv ua voj voog. Qhov no tsis yog nce ntxiv sawv ntsug-ib leeg tau ntau lawm, tab sis kuj tau txo hluav taws xob kev siv hluav taws xob.
3. Txo cov tshuaj tua dej siab
Los ntawm kev txhim kho cov txiaj ntsig flocculation, polyacrylamide tuaj yeem txo cov ntsiab lus dej phwj tuaj hauv dej phwj tuaj, txo cov nqi tiv thaiv ib puag ncig ntawm cov lag luam.
4. Txhim Kho Ntawv Zoo
Kev siv ntawm dispersants ua rau cov ntawv faib fiber ntau ntxiv, tseem ceeb txhim kho lub cev thiab pom kev ua lag luam kev sib tw ntawm cov khoom.
Yam cuam tshuam rau kev siv cov nyhuv ntawm polyacrylamide
Txhawm rau muab kev ua si tag nrho rau kev ua haujlwm ntawm polyacrylamide, cov hauv qab no yuav tsum tau tsom rau:
1. PAM qauv xaiv
Cov txheej txheem sib txawv thiab cov ntawv nyias nyias muaj nyias qhov yuav tsum muaj rau qhov hnyav molecular thiab them nqi ntau ntawm PAM. High molecular hnyav paam yog haum rau flocculation thiab lim kev pab, thaum tsawg molecular hnyav Pam yog qhov tsim nyog rau dispersion.
2. Ntxiv cov nqi thiab ntxiv txoj kev
Tus nqi ntawm Pam ntxiv yuav tsum tau qhia meej meej. Cov nyiaj tsis zoo yuav ua rau cuam tshuam tsis zoo, xws li cuam tshuam kev ua yeeb yam kom muaj kev ua tau zoo lossis nce ntau lawm. Nyob rau tib lub sijhawm, ib txoj kev rho tawm tsis sib xws ntxiv yuav tsum tau siv los kom tsis txhob muaj kev sib sau hauv zos uas cuam tshuam rau cov nyhuv.
3. Cov Txheej Txheem Txheej Txheem
Qhov kub thiab txias, Ph thiab dej rau txhua qhov cuam tshuam Pam kev ua tau zoo. Piv txwv li, Cationic Pam ua haujlwm zoo tshaj plaws hauv kev tsis zoo rau cov acidic acidic, thaum anionic Pam yog qhov haum rau cov alkaline ib puag ncig.
Raws li ntau-ua haujlwm ntxiv nyob rau hauv kev lag luam papermaking, polyacrylamide ua kom zoo dua qub nrog nws cov khoom lag luam zoo tshaj plaws nrog nws cov khoom lag luam zoo tshaj plaws, rov ua dua tshiab, pom kev zoo thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm thiab kev faib tawm. Hauv cov ntawv thov siv, cov tuam txhab yuav tsum xaiv thiab ua kom zoo siv cov txiaj ntsig zoo raws li lawv tus kheej cov yam ntxwv zoo tshaj plaws thiab cov txiaj ntsig ib puag ncig.
Lub Sijhawm Post: Nov-28-2024
