Kev daws rau kev kho dej khib nyiab los ntawm polyethylene fiber ntau pov tseg
Cov hnab looj tes ntsev, ua ib qho tseem ceeb ntawm cov khoom siv tiv thaiv tus kheej (PPE), tau siv dav hauv ntau yam lag luam xws li kev kho mob, kev lag luam, kev tsim kho, thiab khoom noj. Nyob rau hauv xyoo tas los no, nrog kev tswj hwm kev noj qab haus huv thiab kev nyab xeeb, txhim kho kev paub txog kev noj qab haus huv rau pej xeem, thiab kev tsim kho vaj tse nyob rau hauv cov lag luam tawm tshiab, lub ntiaj teb kev thov rau siab -cov hnab looj tes tiv thaiv kev ua haujlwm zoo tau nce zuj zus.
Kev lag luam thoob ntiaj teb polyethylene fiber ntau tau loj hlob tsis tu ncua, nrog kev lag luam loj ntawm 15 billion US las hauv 2025, nce li ntawm 20% piv rau 2020 kev lag luam loj, thiab xav tias yuav loj hlob ntxiv rau xyoo tom ntej.
I. Txheej txheem cej luam ntawm Polyethylene Fiber Wastewater Treatment Cov neeg siv khoom
Polyethylene fibers (xws li ultra- siab molecular hnyav polyethylene UHMWPE) tsim cov dej khib nyiab thaum lub sij hawm tsim khoom, uas muaj cov organic teeb meem, cov kuab tshuaj (xws li decalin, roj dawb, thiab lwm yam), tshem tawm cov khib nyiab, thiab cov khoom siv ntxiv. Cov dej khib nyiab no muaj cov khoom siv tsis zoo thiab tsis muaj biodegradability, thiab yuav tsum tau ua kom huv huv los ntawm kev sib xyaw ua ntej -kev kho mob, kev kho biochemical, thiab kev kho mob siab heev. Yog tias cov dej khib nyiab no tsis raug kho kom raug thiab tso tawm ncaj qha, nws tsis tsuas yog ua txhaum txoj cai tiv thaiv ib puag ncig nkaus xwb tab sis kuj yuav muaj kev cuam tshuam loj rau ecological ib puag ncig. Yog li ntawd, cov neeg muab kev pabcuam kev pabcuam uas muaj peev xwm ua tau raws li kev khomob tau dhau los ua cov koom tes tseem ceeb hauv kev hloov pauv thiab txhim kho kev lag luam no.
Kev tsim cov duab nrog
II. Kev kho ntawm Polyethylene Fiber Wastewater Wastewater Source
Polyethylene fiber ntau cov dej khib nyiab feem ntau yog los ntawm ntau theem hauv cov txheej txheem ntawm polyethylene fibers. Raws li kev tshawb fawb thiab cov ntawv ceeb toom, cov peev txheej ntawm polyethylene fiber ntau cov dej khib nyiab tuaj yeem muab sau ua cov ntsiab lus hauv qab no:
1. Ua ntej-kev kho mob ua ntej tig
Ua ntej spinning, polyethylene raw cov ntaub ntawv yuav tsum tau mus ua ntej - kho, xws li dissolution thiab pom. Thaum lub sijhawm ua haujlwm no, cov dej khib nyiab uas muaj cov khoom siv raw thiab cov kuab tshuaj yog tsim. Cov dej khib nyiab no feem ntau muaj cov ntsiab lus siab ntawm cov organic thiab cov khib nyiab pov tseg, thiab yuav tsum tau kho kom tsis txhob muaj kuab paug ib puag ncig.
2. Cov txheej txheem spinning
Thaum lub sij hawm spinning txheej txheem, vim lub jetting thiab solidification ntawm cov kua spinning, ib tug loj npaum li cas ntawm cov dej khib nyiab uas raug tshem tawm cov khib nyiab thiab cov organic teeb meem yog generated. Cov pa phem hauv cov dej khib nyiab no feem ntau suav nrog cov khoom seem ntawm cov kua spinning, fiber ntau, thiab lwm yam, thiab yuav tsum tau ua kom huv los ntawm cov txheej txheem kho kom tsim nyog.
3. Tshaj tawm - cov txheej txheem kho mob
Tom qab- cov txheej txheem kho muaj xws li ntxuav, ziab, ncab, thiab lwm yam. Cov txheej txheem no kuj tsim cov dej khib nyiab. Nws tuaj yeem muaj cov khoom siv rov ua dua qub, fluorides, thiab lwm yam kuab paug. Kev kho cov dej khib nyiab no yuav tsum tau saib xyuas tshwj xeeb los xyuas kom meej tias cov dej ntws zoo raws li cov qauv kev tiv thaiv ib puag ncig.
4. Lwm cov theem ntau lawm
Ntxiv rau cov theem tseem ceeb saum toj no, lwm theem hauv cov txheej txheem polyethylene fiber ntau, xws li polymerization, spinning, thiab ncab, kuj tseem tuaj yeem tsim cov dej khib nyiab. Qhov muaj pes tsawg leeg ntawm cov dej khib nyiab no yog qhov nyuaj, muaj cov monomers tsis muaj kev cuam tshuam, cov kuab tshuaj organic, hnyav hlau catalysts, thiab auxiliaries, thiab yuav tsum muaj kev tshawb nrhiav thiab kev kho mob.
Kev sib piv ntawm cov duab qhia cov dej qias neeg thiab cov duab qhia cov dej kho
III. Polyethylene Fiber Wastewater Treatment Process Flow
Polyethylene fibers (tshwj xeeb tshaj yog ultra- siab molecular hnyav polyethylene fibers) tsim cov dej khib nyiab thaum lub sij hawm tsim khoom uas muaj cov kuab tshuaj organic xws li cov roj dawb, dichloromethane, ethanol, thiab cov khoom siv polymer me me. Hom dej khib nyiab no muaj qhov sib xyaw ua ke thiab tsis zoo biodegradability, thiab yuav tsum muaj ntau theem ntawm kev kho mob kom ua tau raws li cov qauv tso tawm.
Raws li cov ntaub ntawv qhia txog kev cuam tshuam ib puag ncig thiab kev tiv thaiv ib puag ncig cov ntaub ntawv ntawm ntau qhov haujlwm, cov txheej txheem kev kho mob raug muab sib xyaw ua ke ntawm lub cev, tshuaj, thiab cov txheej txheem lom neeg los xyuas kom meej kev kho mob thiab kev ruaj ntseg.
Kev kho cov txheej txheem module tsom xam
1. Ua ntej-theem kho: Tshem tawm cov khoom loj thiab tswj cov dej kom zoo
Grate: cuam tshuam loj tshem tawm impurities hauv cov dej khib nyiab los tiv thaiv kev thaiv cov khoom siv tom ntej.
Kev sib npaug ntawm lub tank: Vim tias cov dej ntws tsis tu ncua thiab kev hloov pauv loj hauv cov dej zoo ntawm cov khoom siv polyethylene, lub tank sib npaug yog teem rau homogenize thiab sib npaug ntawm cov dej zoo, stabilize tus nqi pH, thiab muab cov xwm txheej rau kev kho mob tom ntej.
Coagulation sedimentation: Ntxiv cov coagulants (xws li PAC, PAM) ua rau cov khoom zoo colloidal coagulate rau hauv flocs thiab nyob, zoo txo turbidity thiab qee COD.
2. Biochemical kho theem: Degradation ntawm cov organic pollutants
Kev kho mob anaerobic (xws li UASB): Siv cov kab mob anaerobic kom decompose nyuaj -kom-degrade loj- cov organic molecule rau hauv cov khoom me me, txhim kho biodegradability ntawm cov dej khib nyiab, thiab tsim lub zog rov qab los ntawm biogas.
Aerobic kev kho mob (xws li hu rau oxidation, SBR):
Cov kab mob txuas mus rau cov fillers los ua biofilm, ntxiv degrading organic teeb meem;
Qhov tseem ceeb txo COD thiab BOD ntsuas.
Vim yog qhov tsis zoo pib biodegradability ntawm polyethylene cov dej khib nyiab (BOD / COD feem ntau <0.25), feem ntau nws yog qhov tsim nyog los txhim kho qhov zoo los ntawm kev ua ntej -kev kho mob ua ntej nkag mus rau hauv biochemical system.
3. Kev kho mob tob: xyuas kom muaj kev ua raws li cov dej ntws tawm
Activated carbon adsorption: Siv rau adsorb residual organic teeb meem thiab xim, txhim kho qhov zoo ntawm cov effluent.
Lim / xuab zeb pom: Tshem tawm cov khoom seem uas raug tshem tawm kom paub meej cov dej ntws tawm.
MBR membrane bioreactor: Kev sib koom ua ke membrane sib cais thiab kev kho mob lom neeg, cov dej ntws zoo dua thiab tsim nyog rau cov dej rov siv dua.
Tus yuam sij rau kev kho cov dej khib nyiab polyethylene yog nyob rau hauv ntau- theem kev tswj hwm:
1. Ua kom cov kab mob nkag mus ruaj khov los ntawm kev kho ua ntej -;
2. Siv cov "anaerobic + aerobic" ua ke kom nce cov organic teeb meem tshem tawm;
3. Thaum kawg, xyuas kom ua raws li cov qauv tso tawm lossis ua tiav cov dej rov qab los ntawm kev kho mob siab heev.
Tsis tas li ntawd, qee lub tuam txhab tseem tsim cov dej khib nyiab rov siv dua thiab rov siv dua, xws li siv cov txheej lim dej sib xyaw (quartz hmoov + activated carbon), me ntsis acidic silica xuab zeb txheej, thiab nruab nrab xuab zeb txheej rau kev ua kom huv si, kom paub txog kev rov ua dua ntawm kev ntxuav cov dej khib nyiab thiab txuag dej.
Kev kho dej phwj tuaj chart
Kev cai & Ua ntej-kev kho mob → Anaerobic Biodegradation → Aerobic Biochemical Treatment → Advanced Purification → Tso tawm mus rau Standard / Reuse
IV. Cov Kev Kawm Tshwj Xeeb ntawm Polyethylene Fiber Wastewater Treatment
Case Study on Application of Polyethylene Fiber Production Wastewater Treatment Project
I. Project Overview
Kev kho dej khib nyiab kho dua tshiab rau kev lag luam ethylene fiber ntau muaj cov dej khib nyiab ntawm 800 m³ / d. Cov dej khib nyiab los ntawm cov txheej txheem xws li spinning thiab roj tus neeg saib xyuas tu, thiab muaj siab -cov dej khib nyiab organic (muaj PVA, cov roj spinning, thiab lwm yam). Nws yuav tsum tau kho kom ua tau raws li thawj - theem tus qauv ntawm "Integrated Wastewater Discharge Standard" (GB8978-1996), thaum tseem txiav txim siab ib nrab rov siv dua.
II. Inflow Dej Zoo
Core inlet dej ntsuas: CODcr 3500-4500mg / L, BOD₅ 1200-1800mg / L, SS 800-1200mg / L, ammonia nitrogen 30-50mg / L, ntsev cov ntsiab lus 1500-2000mg / L.
III. Cov txheej txheem kho tseem ceeb
Cov txheej txheem siv txoj hauv kev ntawm "pre-kev kho + anaerobic biodegradation + aerobic biodegradation + sib sib zog nqus purification + sludge kho". Lub luag haujlwm tseem ceeb ntawm txhua chav tsev yog raws li hauv qab no:
1. Pre-Tsev Kho Mob (B+C+D)
Grate los cuam tshuam cov khoom loj xws li cov khib nyiab fiber ntau; Equalization tank kom homogenize dej zoo thiab ntim; Huab cua flotation tank ntxiv flocculants tshem tawm 85% ntawm cov roj av thiab 70% ntawm SS, txo cov load tom ntej.
2. Biodegradation Treatment Unit (E+F+G)
UASB anaerobic reactor kom degrade siab -concentration organic teeb meem, nrog COD tshem tawm tus nqi ntawm 75%-80%, thiab cov biogas yuav resourceized; A / O aerobic tank kom ua tiav cov nitrogen tshem tawm thiab txo qis COD thiab BOD ntxiv; Secondary sedimentation tank ua kom tiav sludge-dej sib cais, nrog rau SS effluent tsawg dua los yog sib npaug rau 30mg / L.
3. Deep Purification Unit (H + I + J)
Ultrafiltration khaws cov colloids, thim rov qab osmosis rau desalination (desalination tus nqi ntawm 95% lossis ntau dua); Clearwater tank rau cia, nrog 60% rau rov qab siv thiab 40% rau kev ua raws cai tawm.
4. Sludge Treatment Unit (K+L+M)
Sludge thickening tank kom txo ntim, phaj thiab ncej lim xovxwm kom txo cov sludge noo noo cov ntsiab lus qis dua 60% los tsim sludge ncuav mog qab zib, thiab thauj khoom pov tseg kom tsis txhob muaj pa phem thib ob.
IV. Kev kho mob nyhuv
Tom qab qhov project tau muab tso rau hauv kev ua haujlwm, nws tau ua haujlwm ruaj khov, thiab txhua qhov ntsuas ntawm cov dej ntws tau ua raws li thawj - theem tus qauv thiab cov kev xav tau rau kev rov siv dua, ua tiav cov dej khib nyiab pov tseg thiab cov khoom siv dej rov ua dua tshiab, thiab txo cov nqi ntawm cov khoom siv dej.
