Daim ntawv ua lub luag haujlwm tseem ceeb hauv lub neej niaj hnub, los ntawm kev sau ntawv mus rau kev luam ntawv, los ntawm kev ntim khoom mus rau cov khoom siv huv, uas npog txhua yam ntawm tib neeg lub neej. Koj puas paub qhov zais cia tom qab ntawv? Muaj ib qho tseem ceeb tshuaj nyob rau hauv daim ntawv ua txheej txheem, uas yog,Polyacrylamide. Hauv tsab xov xwm no, peb feem ntau tham txog kev siv PAM hauv kev lag luam ntawv.
Raws li cov tshuaj ntxiv tseem ceeb, polyacrylamide (PAM) ua lub luag haujlwm tseem ceeb hauv txhua yam ntawm kev lag luam ntawv. Los ntawm pulping mus rau daim ntawv sib sau, thiab tom qab ntawd mus rau tom qab kev kho dej khib nyiab, nws tau qhia txog kev ua tau zoo thiab ntau yam kev siv.
Retention thiab Filter Agent
Nyob rau hauv lub pulping theem, PAM tuaj yeem sau cov fibers zoo thiab muab cov khoom ntim rau hauv cov flocs loj dua los ntawm nws cov adsorption thiab interparticle bridging, txhawm rau txhim kho lawv cov tuav. Nws tsis tsuas yog txhim kho cov formability thiab lub zog ntawm daim ntawv, tab sis kuj tseem txo cov khoom siv raw hauv cov txheej txheem ua ntawv. Nyob rau tib lub sijhawm, PAM tuaj yeem txhim kho cov dej pom ntawm cov ntaub so ntswg, txo qhov kev tiv thaiv hauv cov txheej txheem dej lim, thiab ua kom cov pulp yooj yim dua los ntawm cov ntxaij lim dej. Qhov no pab txhim kho kev tsim khoom ntawm lub tshuab ntawv thiab cov ntawv zoo.
Reinforceing Agent
PAM tuaj yeem ua kom lub zog sib khi ntawm cov fibers, yog li txhim kho lub zog thiab ua haujlwm ntev ntawm daim ntawv. Qhov tsim nyog ntxiv ntawm PAM hauv cov txheej txheem ua ntawv tuaj yeem txhim kho lub cev ntawm daim ntawv, xws li lub zog tensile, tawg lub zog thiab lub zog tearing.
Dispersing Agent
PAM muaj kev ua haujlwm zoo heev dispersion, uas ua lub luag haujlwm tseem ceeb hauv kev kho cov ntawv. Nws tuaj yeem tiv thaiv kev sib sau ua ke thiab kev sib haum xeeb ntawm fiber ntau thiab muab tub lim nyob rau hauv cov ntaub so ntswg, yog li tswj kev ruaj ntseg thiab sib xws ntawm cov tawv nqaij. Kev ruaj ntseg yog qhov tseem ceeb los xyuas kom meej qhov sib xws ntawm cov ntawv zoo, pab txo tus nqi ntawm qhov tsis xws luag hauv cov txheej txheem ntau lawm thiab txhim kho tag nrho cov kev ua tau zoo.
Sizing Tus neeg saib xyuas
Nyob rau theem tom qab ua tiav hauv kev tsim cov ntawv, PAM tuaj yeem siv los ua tus neeg sawv cev sizing. Ntxiv PAM rau hauv cov txheej txheem ua ntawv tuaj yeem txhim kho cov dej tsis kam ntawm daim ntawv, tiv thaiv tus number case los ntawm kev nkag los yog feathering ntawm daim ntawv saum npoo los txhim kho cov ntawv luam. Lub caij no, cov nyhuv loj ntawm PAM kuj tseem pab txuas ntxiv lub txee lub neej thiab kev pabcuam lub neej ntawm daim ntawv kom tau raws li kev xav tau ntawm kev lag luam ntau yam.
Qhov tseem ceeb tshaj plaws, PAM tseem yog lub luag haujlwm rau kev lim dej hauv kev lag luam ntawv. Cov txheej txheem ntawm kev ua ntawv yuav tsim cov dej khib nyiab ntau, nrog rau cov dej dawb, dej dub los ntawm pulping, thiab cov dej khib nyiab zaum kawg, uas muaj ntau yam organic thiab impurities.
- Cov dej dawb yog cov dej tso tawm los ntawm lub tshuab ntawv thaum lub sijhawm ua ntawv, thiab nws cov kab mob tseem ceeb yog cov khoom ntim, xws li CaCO3 thiab cationic starch, thiab fibers. Vim muaj cov ntsiab lus fiber ntau hauv cov dej dawb, nws muaj qhov tseem ceeb rov qab siv dua hauv cov txheej txheem ua ntawv. Siv PAM rauKev kho mob Flocculation tuaj yeem tshem tawm cov teeb meem thiab impurities hauv dej, kom paub txog kev rov qab thiab siv dej dawb.
- Raws li kev kho cov dej dub, CPAM yog qhov kev xaiv zoo. Nws tuaj yeem flocculate lignin thiab pigments hauv dej, yog li tshem tawm chroma thiab COD.
- Tom qab kev kho cov dej khib nyiab zaum kawg, nws yuav tsim cov sludge ntau. Raws li tus neeg sawv cev dewatering zoo, Cationic PAM tuaj yeem daws qhov teeb meem no zoo. Nws tuaj yeem tsis tsuas yog txo cov dej noo ntawm cov sludge, tab sis kuj txo cov sludge zoo heev.
Nws tuaj yeem pom tias PAM muaj txiaj ntsig zoo hauv kev ua kom dej huv.
Tag nrho hauv tag nrho, muaj ntau yam txiaj ntsig ntawm PAM hauv kev lag luam ntawv, suav nrog kev txhim kho kev tsim khoom, ua kom cov ntawv ua haujlwm zoo, ua kom cov ntaub ntawv ruaj khov, txhim kho cov ntawv tsis zoo, thiab lwm yam. Yog tias koj xav tau, thov hu rau peb.