Txheej txheem cej luamPapermaking cov dej khib nyiab tsuas 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, ua cov pulp, thiab tom qab ntawd tshuaj dawb. Cov txheej txheem no yuav tsim ntau cov ntaub ntawv pov tseg; papermaking yog dilute, puab, nias, thiab qhuav lub pulp los ua ntawv. Cov txheej txheem no tseem muaj peev xwm tsim cov dej khib nyiab papermaking. Cov dej khib nyiab tseem ceeb uas tsim tawm hauv cov txheej txheem pulping yog cawv dub thiab cawv liab, thiab papermaking tsuas yog ua dej dawb.
Cov yam ntxwv tseem ceeb 1. Cov dej khib nyiab loj.2. Cov dej khib nyiab muaj ntau cov khib nyiab tshem tawm, feem ntau yog number case, fiber ntau, muab tub lim thiab additives.3. Cov SS, COD, BOD thiab lwm yam kuab paug nyob rau hauv cov dej khib nyiab yog qhov siab, cov ntsiab lus COD yog siab dua BOD, thiab xim yog tsaus dua.
Kev npaj kho mob thiab kev daws teeb meem.1. Txoj kev kho mob Txoj kev kho tam sim no tsuas yog siv anaerobic, aerobic, lub cev thiab tshuaj coagulation thiab sedimentation txheej txheem kev kho mob ua ke.
Kev kho cov txheej txheem thiab ntws: Tom qab cov dej khib nyiab nkag mus rau hauv cov dej khib nyiab, nws thawj zaug dhau los ntawm cov khib nyiab pov tseg kom tshem tawm cov khib nyiab loj, nkag mus rau hauv lub pas dej ua ke kom sib npaug, nkag mus rau hauv lub tank coagulation, thiab tsim cov coagulation cov tshuaj tiv thaiv los ntawm kev ntxiv polyaluminum chloride thiab polyacrylamide. Tom qab nkag mus rau hauv flotation, SS thiab ib feem ntawm BOD thiab COD nyob rau hauv cov dej khib nyiab raug tshem tawm. Lub flotation effluent nkag mus rau hauv anaerobic thiab aerobic ob-theem biochemical kho kom tshem tawm feem ntau ntawm BOD thiab COD hauv dej. Tom qab ob lub tank sedimentation, COD thiab chromaticity ntawm cov dej khib nyiab tsis ua raws li lub teb chaws emission qauv. Cov tshuaj coagulation yog siv los kho kho kom zoo kom cov dej khib nyiab tuaj yeem ua tau raws li cov qauv emission los yog ua tau raws li cov qauv emission.
Tej teeb meem thiab kev daws teeb meem 1) COD tshaj tus qauv. Tom qab cov dej khib nyiab tau kho los ntawm kev kho mob anaerobic thiab aerobic biochemical, COD ntawm cov effluent tsis ua raws li cov qauv emission.Solution: Siv high-efficiency COD degradation agent SCOD rau kev kho mob. Ntxiv rau dej hauv ib qho kev faib ua feem thiab ua rau 30 feeb.
2) Ob qho tib si chromaticity thiab COD tshaj tus qauv Tom qab cov dej khib nyiab tau kho los ntawm kev kho anaerobic thiab aerobic biochemical, COD ntawm cov dej ntws tsis tau raws li cov qauv emission. Kev daws: Ntxiv high-efficiency flocculation decolorizer, sib tov nrog high-efficiency decolorizer, thiab thaum kawg siv polyacrylamide rau flocculation thiab nag lossis daus, sib cais cov kua-kua.
3) Ntau dhau ammonia nitrogen Cov effluent ammonia nitrogen tsis tuaj yeem ua tau raws li cov kev cai emission tam sim no. Kev daws: Ntxiv ammonia nitrogen tshem tawm, do los yog aerate thiab sib tov, thiab teb rau 6 feeb. Nyob rau hauv ib daim ntawv zeb, cov effluent ammonia nitrogen yog hais txog 40ppm, thiab lub zos ammonia nitrogen emission standard yog qis dua 15ppm, uas tsis tuaj yeem ua tau raws li cov kev cai emission tau teev tseg los ntawm kev tiv thaiv ib puag ncig.
Xaus Papermaking kev kho dej khib nyiab yuav tsum tsom mus rau kev txhim kho cov dej rov ua dua tshiab, txo cov dej siv thiab cov dej khib nyiab pov tseg, thiab tib lub sijhawm, nws yuav tsum nquag tshawb nrhiav ntau yam kev txhim khu kev qha, kev lag luam thiab kev kho dej khib nyiab uas tuaj yeem siv tag nrho cov peev txheej hauv cov dej khib nyiab. Piv txwv li: txoj kev flotation tuaj yeem rov qab tau cov khoom fibrous hauv dej dawb, nrog tus nqi rov qab txog li 95%, thiab cov dej ntshiab tuaj yeem rov qab siv dua; combustion wastewater kho txoj kev tuaj yeem rov qab tau sodium hydroxide, sodium sulfide, sodium sulfate thiab lwm yam sodium ntsev ua ke nrog cov organic teeb meem hauv dej dub. Neutralization wastewater kho txoj kev kho tus nqi pH ntawm cov dej khib nyiab; coagulation sedimentation lossis flotation tuaj yeem tshem tawm cov khoom loj ntawm SS hauv dej khib nyiab; chemical los nag txoj kev tuaj yeem decolorize; Txoj kev kho mob lom neeg tuaj yeem tshem tawm BOD thiab COD, uas yog qhov zoo dua rau cov ntawv pov tseg kraft. Tsis tas li ntawd, kuj tseem muaj qhov rov qab osmosis, ultrafiltration, electrodialysis thiab lwm yam kev kho dej khib nyiab siv hauv tsev thiab txawv teb chaws.
Post lub sij hawm: Jan-17-2025