Pulp concentration
Raws li qhov concentration ntawm pulp, pulping tuaj yeem faib ua qis -concentration pulping, nruab nrab-concentration pulping thiab siab -concentration pulping. Feem ntau, thaum lub pulp concentration qis dua 10%, nws yog hu ua low -concentration pulping; thaum nws nyob nruab nrab ntawm 10% thiab 20%, nws yog hu ua nruab nrab -concentration pulping; thiab thaum nws yog 20% mus rau 30% lossis siab dua, nws yog hu ua siab -concentration pulping. Qhov concentration ntawm cov ntaub so ntswg muaj feem cuam tshuam rau lub pulping zoo thiab thaum kawg cuam tshuam rau qhov sib xws ntawm daim ntawv tsim ntawm polyester forming ntaub. Cov yam ntxwv tau piav raws li hauv qab no.
1. Tsawg concentration pulping
Qhov concentration ntawm cov txheej txheem pulping yog txiav txim siab los ntawm hom ntawv, txoj kev pulping, thiab kev ua haujlwm ntawm cov khoom siv pulping. Feem ntau hais lus, rau batch pulping trough- hom pulper, lub pulping concentration rau kev ua kua nplaum yog 6% mus rau 8%, thiab ua dawb- ntws pulp, nws yog 3% mus rau 5%; Txawm li cas los xij, rau lub tshuab pulping tsis tu ncua, cov pulping concentration rau kev ua kua nplaum yog 4% mus rau 6%, thiab rau kev ua dawb -flowing pulp, nws yog 2% mus rau 4%. Los ntawm kev ua kom cov pulping concentration, tus nqi ntawm cov pulp nkag mus rau ntawm lub rotating disc thiab lub taag disc (los yog nruab nrab ntawm lub flying riam thiab hauv qab riam) nce, thiab lub siab ntawm txhua fiber bears txo raws li, yog li txo qhov kev txiav txim ntawm cov fibers thiab txhawb lub squeezing thiab kneading nyhuv ntawm cov fibers, uas yog zoo rau lub dispersion fibers. Yog li ntawd, ua kom cov pulping concentration yog tsim nyog rau ua viscous pulp, thiab hom pulp dries qeeb dua, uas muaj cov kev cai tshwj xeeb rau lub cev qhuav dej tom ntej thiab shaping txheej txheem ntawm lubpolyester forming ntaub. Ntawm qhov tsis sib xws, txo cov pulping concentration yog qhov zoo rau kev txiav cov fiber ntau thiab tsim nyog rau kev ua dawb -flowing pulp.
Ua kom cov pulp concentration tuaj yeem txhim kho qhov ntim ntawm cov ntaub so ntswg thiab txo lub zog noj ib tuj ntawm cov tawv nqaij, yog li txo cov nqi tsim khoom. Txawm li cas los xij, kev nce siab ntawm cov pulp feem ntau txwv los ntawm cov xwm txheej ntawm cov khoom siv pulping. Piv txwv li, qhov siab tshaj plaws concentration uas lub tshuab tubular pulping tuaj yeem ua kom lub cev tsis sib xws ntawm cov tawv nqaij hauv lub tank circulating tsawg dua 10%; Cov khoom siv pulping tsis tu ncua muaj cov kev xav tau ntau dua rau kev nkag mus thiab kev ruaj ntseg ntawm cov tawv nqaij, thiab raug txwv los ntawm cov khoom siv, tsis tshua muaj kev tuav ntau tshaj 6%. Txij li thaum cov concentrations qis dua tsis muaj kev lag luam, kev ua kom cov nqaij tawv nqaij muaj txiaj ntsig zoo rau kev ua kom zoo dua qub thiab txo cov nqi. Raws li cov txheej txheem tso cai los ntawm cov txheej txheem thiab cov khoom siv, raws li qhov yuav tsum tau ua ntawm cov ntawv ua tau zoo, lub pulp concentration yuav tsum tau nce ntau li ntau tau. Piv txwv li, thaum tsim cov ntawv ntim siab - lub zog ntim ntawv, siv lub zog siab dua me ntsis tuaj yeem txhim kho lub zog fiber ntau thiab ua kom cov ntawv tsim kom ua tiav cov ntawv ntub dej zoo dua ntawm cov ntaub ntawv polyester.
Rau cov ntaub ntawv tshwj xeeb uas yuav tsum tau siv high -kawg "polyester forming fabric" los xyuas kom meej qhov zoo tshaj plaws uniformity thiab saum npoo ntawm daim ntawv, kev tswj qhov tseeb ntawm pulping concentration yog qhov nruj dua. Thaum kawg, cov txheej txheem pulping optimized yuav tsum tau sib xws nrog cov yam ntxwv ntawm "polyester forming fabric" thiaj li ua kom muaj kev ruaj ntseg thiab kev ua tau zoo thoob plaws hauv tag nrho cov txheej txheem los ntawm pulping mus rau kev tsim.
