Cov ntaub ntawv dab tsi yog siv rau cov qe ntawv tais? Cov khoom siv rau cov qe ntawv tais yog cov ntawv pov tseg uas tsim nyob rau hauv lub neej txhua hnub, uas yog kev lag luam thiab ib puag ncig zoo. Tom ntej no, cia peb saib cov txheej txheem tsim cov qe ntawv tais.
Cov txheej txheem ntau lawm ntawm qe ntawv tais yog:
Ua ntej ntawm tag nrho cov, cov ntaub ntawv pov tseg, cov khoom siv tseem ceeb siv los ua cov ntawv ntim cov qe tais (cov thawv), yog muab tso rau hauv hydraulic pulper, thiab decomposed rau hauv cov nqaij fibers nyob rau hauv qhov kev txiav txim ntawm shear thiab kev sib txhuam ntawm cov dej ntws; cov pulp fibers nkag mus rau hauv Slurry pas dej ua ke. Ua kom cov khoom zoo nkauj zoo nkauj thiab huv si, nws yog ib qho tsim nyog los tshuaj xyuas cov slurry nyob rau hauv lub tank cia, uas yog, tshem tawm cov impurities (cov ntaub ntawv zaj duab xis, hemp hlua, ntxhib slag, thiab lwm yam) nyob rau hauv lub fiber slurry. Nyob rau tib lub sij hawm, lub slurry yuav tsum tau ntxiv hauv av. Ua kom lub qe tais (lub thawv) tsis muaj dej tsis zoo thiab lwm yam khoom, nws tseem yuav tsum tau ntxiv cov dej tsis muaj dej thiab lwm yam khoom ntxiv hauv cov txheej txheem sib tsoo. Tom qab ntawd, cov slurry yog diluted mus rau ib tug tej yam concentration, thiab yog thaum kawg pumped mus rau hauv lub headbox ntawm lub forming tshuab. Thaum cov pwm tsim saum lub taub hau dab dej thiab tau muab tso rau hauv cov slurry, cov slurry yog absorbed los ntawm lub tshuab nqus tsev nyob rau sab nraum qab ntawm cov pwm pwm thiab sib sau ua ke rau saum npoo ntawm pwm; vim qhov tshwj xeeb nto dej pom thiab hollow qauv ntawm txoj kev pwm, nws sib sau ua ke. Lub pulp fiber nyob rau hauv slurry adheres rau saum npoo ntawm pwm, thiab dej yog pumped tawm. Lub thickness ntawm cov fiber ntau txuas rau saum npoo ntawm cov pwm yog li 2.5 hli, uas yog qhov ntub dej ntawm lub qe tais (lub thawv) khoom. Nws muaj li ntawm 75% ntawm cov dej thiab yuav tsum tau xa mus rau lub tshuab ziab khaub ncaws (kub 80-120 degree) rau dewater thiab qhuav. Cov qe qhuav qhuav (lub thawv) yog npaj txhij rau ntim thiab muab tso rau hauv cia.
