Txheej Txheem Cej Luam Cov dej khib nyiab los ntawm kev ua ntawv feem ntau yog los ntawm ob txoj kev tsim khoom ntawm pulping thiab papermaking hauv kev lag luam papermaking. Pulping yog cais cov fibers los ntawm cov khoom siv raw cog, ua pulp, thiab tom qab ntawd bleach nws. Cov txheej txheem no yuav tsim ntau cov dej khib nyiab los ntawm kev ua ntawv; kev ua ntawv yog kom dilute, zoo li, nias, thiab ziab cov pulp kom ua ntawv. Cov txheej txheem no kuj tseem yuav tsim cov dej khib nyiab los ntawm kev ua ntawv. Cov dej khib nyiab tseem ceeb uas tsim tawm hauv cov txheej txheem pulping yog cov cawv dub thiab cov cawv liab, thiab kev ua ntawv feem ntau tsim cov dej dawb.
Cov yam ntxwv tseem ceeb 1. Muaj dej khib nyiab ntau heev.2. Cov dej khib nyiab muaj ntau cov khoom khov uas raug tshem tawm, feem ntau yog cov kua mem, cov fiber, cov khoom sau thiab cov khoom ntxiv.3. Cov SS, COD, BOD thiab lwm yam kuab paug hauv cov dej khib nyiab muaj ntau heev, cov ntsiab lus COD siab dua BOD, thiab xim tsaus dua.
Txoj kev npaj kho mob thiab kev daws teeb meem.1. Txoj kev kho mob Txoj kev kho mob tam sim no feem ntau siv anaerobic, aerobic, lub cev thiab tshuaj coagulation thiab sedimentation txheej txheem ua ke kho hom.
Cov txheej txheem kho thiab ntws: Tom qab cov dej khib nyiab nkag mus rau hauv lub tshuab kho dej khib nyiab, nws thawj zaug dhau los ntawm lub khib nyiab pov tseg kom tshem tawm cov khib nyiab loj dua, nkag mus rau hauv lub pas dej grid rau kev sib npaug, nkag mus rau hauv lub tank coagulation, thiab tsim cov tshuaj tiv thaiv coagulation los ntawm kev ntxiv polyaluminum chloride thiab polyacrylamide. Tom qab nkag mus rau hauv lub flotation, SS thiab ib feem ntawm BOD thiab COD hauv cov dej khib nyiab raug tshem tawm. Cov dej khib nyiab flotation nkag mus rau hauv kev kho biochemical ob-theem anaerobic thiab aerobic kom tshem tawm feem ntau ntawm BOD thiab COD hauv dej. Tom qab lub tank sedimentation thib ob, COD thiab chromaticity ntawm cov dej khib nyiab tsis ua raws li cov qauv kev tso pa tawm hauv tebchaws. Kev siv tshuaj coagulation yog siv rau kev kho kom zoo dua kom cov dej khib nyiab tuaj yeem ua tau raws li cov qauv kev tso pa tawm lossis tuaj yeem ua tau raws li cov qauv kev tso pa tawm.
Cov Teeb Meem thiab Kev Dais Teeb Meem Feem Ntau 1) COD tshaj qhov tus qauv. Tom qab cov dej khib nyiab raug kho los ntawm kev kho mob anaerobic thiab aerobic biochemical, COD ntawm cov dej khib nyiab tsis ua tau raws li cov qauv tso pa tawm. Kev Dais Teeb Meem: Siv cov tshuaj COD degradation SCOD uas ua haujlwm tau zoo rau kev kho mob. Ntxiv rau hauv dej hauv ib qho kev faib ua feem thiab ua rau 30 feeb.
2) Ob qho tib si chromaticity thiab COD tshaj qhov qauv Tom qab cov dej khib nyiab raug kho los ntawm kev kho mob anaerobic thiab aerobic biochemical, COD ntawm cov dej khib nyiab tsis ua raws li cov qauv tso pa tawm. Kev daws teeb meem: Ntxiv cov tshuaj flocculation decolorizer ua haujlwm siab, sib tov nrog cov tshuaj decolorizer ua haujlwm siab, thiab thaum kawg siv polyacrylamide rau flocculation thiab nag lossis daus, sib cais cov khoom khov-kua.
3) Cov ammonia nitrogen ntau dhau Cov dej khib nyiab ammonia nitrogen tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua kom muaj pa phem tam sim no. Kev daws teeb meem: Ntxiv cov tshuaj ammonia nitrogen, do lossis aerate thiab sib tov, thiab teb rau 6 feeb. Hauv lub tshuab ua ntawv, cov dej khib nyiab ammonia nitrogen yog li 40ppm, thiab tus qauv tso pa phem ammonia nitrogen hauv zos yog qis dua 15ppm, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua kom muaj pa phem uas tau teev tseg los ntawm cov cai tiv thaiv ib puag ncig.
Xaus Lus Kev kho cov dej khib nyiab los ntawm kev ua ntawv yuav tsum tsom mus rau kev txhim kho cov dej rov ua dua tshiab, txo kev siv dej thiab kev tso dej khib nyiab tawm, thiab tib lub sijhawm, nws yuav tsum tshawb nrhiav ntau txoj kev kho dej khib nyiab uas txhim khu kev qha, pheej yig thiab siv tau zoo hauv cov dej khib nyiab. Piv txwv li: txoj kev flotation tuaj yeem rov qab tau cov khoom fibrous hauv dej dawb, nrog rau tus nqi rov qab txog li 95%, thiab dej ntshiab tuaj yeem rov siv dua; txoj kev kho dej khib nyiab combustion tuaj yeem rov qab tau sodium hydroxide, sodium sulfide, sodium sulfate thiab lwm yam ntsev sodium ua ke nrog cov organic hauv dej dub. Txoj kev kho dej khib nyiab neutralization kho qhov pH ntawm cov dej khib nyiab; coagulation sedimentation lossis flotation tuaj yeem tshem tawm cov khoom loj ntawm SS hauv cov dej khib nyiab; txoj kev nag lossis daus tshuaj tuaj yeem decolorize; txoj kev kho mob biological tuaj yeem tshem tawm BOD thiab COD, uas zoo dua rau cov dej khib nyiab ntawv kraft. Tsis tas li ntawd, kuj tseem muaj kev rov qab osmosis, ultrafiltration, electrodialysis thiab lwm txoj kev kho dej khib nyiab siv hauv tsev thiab txawv teb chaws.
Lub sijhawm tshaj tawm: Lub Ib Hlis-17-2025