Kev lag luam ntawv yog lub teb chaws uas siv cov khoom Sodium Sulfite ntau tshaj plaws. Sodium Sulfite yog ib qho tseem ceeb tshaj plaws hauv kev lag luam ua ntawv, tshwj xeeb tshaj yog rau kev ua cov ntawv uas tsis yog ntoo. Qhov zoo ntawm txoj kev ua cov ntawv no yog xim dawb, siv cov tshuaj dawb tsawg dua thiab lwm yam tshuaj, thiab cov kua pov tseg tuaj yeem rov ua dua tshiab los tsim ntau yam khoom seem. Sodium sulfite anhydrous siv rau hauv kev ua noj ua haus alkaline nplej straw, qhov txiaj ntsig ntawm kev ua cov ntawv zoo dua, ua npuas dej tsawg dua, lim dej zoo, ntxuav yooj yim, txuag dej, txo kev siv hluav taws xob. Qhov degree ntawm kev ntaus slurry txo qis, lub zog fiber zoo, yooj yim ua ntawv. Xim ntawm cov nplaum yog sib dua, yooj yim ntxuav thiab txo cov chlorine. Ntawm 160 ℃, 20% (pawg) Sodium Sulfite tau qhia txog kev cuam tshuam zoo heev rau kev sib cais bagasse thiab fiber, thiab tus nqi delignification ncav cuag ntau dua 48% tom qab 30 feeb.
Nrog rau kev txhim kho tas mus li ntawm kev lag luam ua ntawv, kev siv cov fiber rov ua dua tshiab yog qhov tseem ceeb heev los ntawm kev lag luam ua ntawv, uas tsis tsuas yog tuaj yeem txuag tus nqi ntawm kev ua ntawv, tab sis kuj tseem txuag cov peev txheej hav zoov, txo kev siv hluav taws xob, thiab yog qhov zoo rau kev tiv thaiv ib puag ncig. SSA yog tus neeg sawv cev deinking zoo, uas ua lub luag haujlwm hauv deinking los tiv thaiv cov pulp los ntawm kev daj, thiab deinking ntawm sodium sulphite nyob rau hauv cov xwm txheej alkaline tsis muaj zog yog qhov zoo dua rau kev tshem tawm ntawm cov kua mem. Yog tias tsis muaj surfactant, disintegrate ntawm 10% slurry concentration, ntxiv 2% sodium sulfite muaj qhov cuam tshuam pom tseeb. Neutral sodium sulfite yog siv los deink cov ntawv xov xwm qub, thiab qhov ntau ntawm sodium sulfite yog 3% ~ 4%, uas tuaj yeem tau txais cov txiaj ntsig zoo deinking, txo cov kuab paug ntawm cov dej khib nyiab, thiab yog qhov zoo rau kev kho cov dej khib nyiab tom qab.
Lub sijhawm tshaj tawm: Lub Peb Hlis-30-2021