Polypropylene (PP) zaj duab xis yog ib qho ntawm tsib cov khoom siv dav dav hauv ntiaj teb. Nws yog dav siv nyob rau hauv ntim khoom noj, ua liaj ua teb zaj duab xis thiab industrial ntim. Raws li cov ntaub ntawv kev lag luam, Tuam Tshoj tsim ntau tshaj 8 lab tons ntawm polypropylene zaj duab xis pov tseg txhua xyoo, tab sis kev sib xyaw ua ke ntawm cov khoom siv rov ua dua tseem qis dua 25%, tsawg dua li ntau dua 40% ntawm cov teb chaws tsim. Tsis yog qhov no tsuas yog ua rau ntau tshaj $ 100 nphom hauv cov peev txheej pov tseg txhua xyoo, tab sis nws tseem tsim cov pa phem microplastic los ntawm kev hlawv, pov tseg thiab lwm yam, ua rau muaj kev hem thawj rau kev nyab xeeb ntawm ecological. Daim ntawv no txheeb xyuas cov kev cov nyom thiab kev ua tiav cov lus qhia ntawm polypropylene membrane recycling los ntawm peb qhov loj: kev siv tshuab raj, txoj hauv kev tshiab thiab kev koom tes hauv kev lag luam.
Core Technical Bottlenecks Analysis
1.1 Cov kev sib tw ntawm kev sib cais ntawm Composites
Niaj hnub nimno polypropylene (PP) films feem ntau siv multilayer co-extrusion technology, combining cov ntaub ntawv xws li PE, PET thiab txhuas ntawv ci kom tau raws li qhov yuav tsum tau ua. Kev ntim khoom noj txom ncauj, piv txwv li, tuaj yeem ua los ntawm peb txheej --PP / PE / aluminium foil --with aluminium txheej nyias li 7 microns, ua rau lub cev sib cais 300% nyuaj dua. Cov txheej txheem thev naus laus zis thev naus laus zis yuav tsum ua haujlwm ntawm qhov kub siab tshaj 220 degree, uas tuaj yeem ua rau tawg yooj yim hauv PP molecular saw, uas ua rau molten flux (MFR) hloov pauv ntau yam ± 15 g / 10 min rau cov khoom siv rov ua dua, uas tsis haum rau cov khoom siv high-end.
1.2 Kev Nyuaj Siab Hauv Kev Tswj Xyuas Kev Ua Phem Txhaum Cai
PP films are easy to absorb impurities such as ink, adhesives and organic pollutants during recycling. Experiments show that the tensile strength of unwashed recycled polypropylene decreased by 32% and the impact strength decreased by 45%. Existing cleaning processes face a challenge: high temperature water washes (>80 degree) tshem tawm 90% ntawm cov organic teeb meem, tab sis ua rau oxidative degradation ntawm PP, thaum tsis tshua muaj kub ntxuav yuav tsum tau ob zaug raws li ntev raws li cov txheej txheem thiab cov seem impurities tseem 2.3 npaug ntau dua li cov qauv kev lag luam.
1.3 Mechanisms Performance Degradation of Recycled Materials
Polypropylene molecular saw yog feem ntau rau -scission thaum rov kho cua sov, ua rau txo qis crystallinity. Thaum lub sij hawm txhua lub voj voog rov ua dua, qhov kub ntawm qhov sib txawv ntawm PP poob los ntawm qhov nruab nrab ntawm 8℃thiab Vicat softening point txo los ntawm 12 degree. Kev sim los ntawm ib lub tuam txhab tau pom tias tom qab peb lub voj voog rov ua dua tshiab, lub teeb xa hluav taws xob ntawm cov yeeb yaj kiab polypropylene tau txo qis los ntawm 92 feem pua rau 78 feem pua, thiab cov khoom siv oxygen barrier txo qis los ntawm 40%, txwv kev siv cov khoom qis -tus nqi- ntxiv cov khoom.
1.4 Intelligent sorting technology lags.
Kev sau phau ntawv ib txwm muaj tsuas yog 0.8 tonnes / tus neeg / hnub, nrog rau qhov yuam kev ntawm siab txog 18% ib xees. Txawm hais tias nyob ze -infrared (NIR) spectroscopy sorting cov cuab yeej tuaj yeem paub txog cov yam ntxwv ncov ntawm polypropylene, qhov tseeb ntawm kev tshawb pom cov yeeb yaj kiab hauv qab 20 microns yog tsawg dua 75%. Kev ntsuam xyuas teb ntawm lub hauv paus rov ua dua tshiab qhia tau tias PET impurity cov ntsiab lus ntawm cov sib tov yog 3.2%, uas ncaj qha ua rau cov plua plav cov ntsiab lus ntawm cov pellets rov qab ntau dua 2.8 npaug.
Txoj Kev Txhaum Cai Tshiab
2.1 Composite Structure Deconstruction Technology
Tswj kev ntxhov siab thermal stripping: PP / PE interface sib cais sib cais sib cais los ntawm kev sib xyaw ua ke cua sov (120℃→ 160℃degree → 190 degree) nrog kev sib txawv dov siab. Ib lub koom haum tshawb fawb tau tsim dual- cheeb tsam kub tswj qhov system muaj 91%% tev tus nqi ntawm txhuas ntawv ci thiab 98.5% rov qab tus nqi ntawm polypropylene.
Cov kuab tshuaj- Pab Sib cais: PP txheej yog xaiv yaj ntawm 65℃siv cov sib tov ntawm cyclohexane / heptane. Kev sim ua kom pom tau tias cov txheej txheem tuaj yeem txo PET residue kom qis dua 0.3%, hnyav rov qab tus nqi mus rau ntau dua 95% thiab chav siv hluav taws xob rau 42%.
Plasma Etching: Oxygen plasma-kho zaj duab xis nto cuam tshuam aluminium-oxygen khi. Cov txiaj ntsig kev sim qhia tau hais tias tom qab 120 vib nas this ntawm kev kho mob, lub zog ntawm cov txheej txhuas raug txo los ntawm 2.1 N / 15 mm rau 0.3 N / 15 mm.
2.2 Advanced Purification Process Systems
Ultrasonic pab tu: Ntawm 40 kHz zaus, ua ke nrog enzyme additives, tus nqi tshem tawm tus number case ncav cuag 99.7% thiab lub sij hawm ntxuav yog txo mus rau ib feem peb ntawm cov txheej txheem ib txwm muaj. Lub zog tensile ntawm lub tuam txhab siv cov ntaub ntawv siv thev naus laus zis mus txog 38 MPa, uas yog 95% ntawm tus qauv khoom qub.
Supercritical CO2 rho tawm: 99.2% plasticizer residues tuaj yeem raug tshem tawm ntawm 31℃C thiab 7.4 MPa. Kev ntsuam xyuas los ntawm lub koom haum tshawb fawb tau pom tias cov yeeb yaj kiab polypropylene rov ua dua los kho nrog CO2 supercritical ua raws li EU REACH cov cai txwv kev tsiv teb tsaws chaw.
Electromagnetic Induction Impurity Tshem Tawm: highfrequency alternating magnetic teb sib cais hlau impurities, txoj kab uas hla ntawm ntau tshaj 50 microns hais tshem tawm tus nqi ntawm 99.9%. Cov kab rov ua dua tshiab uas siv cov thev naus laus zis no txo cov kev ua haujlwm ntawm cov khoom rov qab mus rau 0.01 μS / cm, ua tau raws li cov zaub mov noj- qib yuav tsum tau ua.
2.3 Kev Txhim Kho Kev Txhim Kho Kev Ua Haujlwm Zoo
Nanomodification Technology: Ntxiv 2% nano-silica nce qhov cuam tshuam lub zog ntawm regenerated PP los ntawm 40% thiab kub distortion kub los ntawm 15 degree. Lub tuam txhab cov nanocomposites hauv tsev tau ua tiav siv hauv kev tsim khoom, ua tiav qhov flexural modulus ntawm 2400 MPa.
Tswj Kev Txhim Kho Tshuab: Peroxide-induced Beta-scission txo cov polydispersity Performance index ntawm polypropylene zoo los ntawm 3.8 mus rau 1.9. Cov txiaj ntsig tau pom tias kev kho degradation tswj tau tuaj yeem txhim kho cov yaj ntws nrawm ntawm cov khoom siv rov ua dua tshiab los ntawm 35%.
Nyob rau hauv qhov chaw vaping lub interfacial nro nro ntawm PP / PE blends tau txo 62%% siv PP-g-MAH compatibilizers. Cov pob txha elongation tus nqi ntawm cov compound tsim los ntawm lub tuam txhab nce mus txog 320%, uas yog haum rau puncture tsis kam ntawm kev ua liaj ua teb mulch.
2.4 Kev txawj ntse sorting khoom hloov kho dua tshiab
Multispectral Fusion Recognition: Kev sib koom ua ke ze ntawm -infrared, Raman, thiab terahertz (THz) sensors tso cai 3D qauv ntawm zaj duab xis tuab, muaj pes tsawg leeg, thiab qib sib kis. Kev sim nrog cov cuab yeej tsim khoom lag luam qhia tau hais tias cov cuab yeej siv tau 98.7 feem pua yog nyob rau hauv kev txheeb xyuas ntawm kev ua haujlwm ceev ntawm 5 tons hauv ib teev.
Artificial intelligence vision Inspection Systems: Raws li kev kawm sib sib zog nqus algorithms, cov tshuab no tuaj yeem txheeb xyuas qhov teeb meem me me li 0.1 mm2. Lub hauv paus rov ua dua siv thev naus laus zis tau txo cov khoom lag luam tsis zoo los ntawm 2.3 feem pua rau 0.15 feem pua, txuag ntau dua $ 8 lab ib xyoos.
Blockchain Traceability Platform: RFID cim npe sau tag nrho cov ntaub ntawv lub neej ua yeeb yaj kiab rau kev tswj xyuas pob tshab los ntawm kev rov qab mus rau kev tsim dua tshiab. Kev sim ua haujlwm tau pom tias cov thev naus laus zis tau coj mus rau 90% nce hauv cov khoom siv raw cov ntaub ntawv kev ua tau zoo thiab 90% txo qis hauv kev tsis sib haum xeeb.
3. Kev Tsim Kho Kev Lag Luam Kev Sib Koom Tes
3.1 Pem hauv ntej-End Design Innovation
Txhawb nqa cov txheej txheem kev lag luam rau kev tsim cov khoom siv yas rov ua dua tshiab uas yuav tsum tau ua cov yeeb yaj kiab polypropylene nrog cov tuab tuab ntawm qis dua 5% kom tsis txhob muaj cov qauv sib xyaw. Ib lub tuam txhab tsim ib qho - txheej PP zaj duab xis rov qab tau 99.2%, thiab tus nqi ntawm cov khoom siv rov ua dua yog 28% qis dua li cov yeeb yaj kiab sib xyaw.
3.2 Kev tsim kho ntawm Central River Network.
Teem ib qho peb -theem txheej txheem ntawm ``chaw nres tsheb rov ua haujlwm hauv zej zog- cov chaw txheeb cais hauv cheeb tsam- cov chaw ua haujlwm tshaj lij' ', nruab nrog cov cuab yeej ntse compression kom txo cov nqi tsheb thauj mus los. Cov ntaub ntawv hauv nroog Pilot qhia tias tus qauv txo cov voj voog rov qab mus rau 3 km thiab txhim kho kev sau los ntawm 40%.
3.3 Xaus-Siv Application Expansion
Npaj ib daim ntawv dawb ntawm cov ntawv siv yas rov siv dua, qhia txog kev siv piv rau hauv tsheb, hluav taws xob thiab ntim khoom. Ib lub tuam txhab tsheb tau nce kev siv cov polypropylene rov qab mus rau 15%, txo cov pa roj carbon monoxide los ntawm 12,000 tonnes ib lub tsheb ib xyoos.
3.4 Txoj cai thiab kev txhawb nqa tus qauv
Cov qauv kev muab cov yas rov ua dua tshiab tau npaj los faib cov PP rov ua dua tshiab rau hauv cov zaub mov, qib kev lag luam thiab tsev. A 70% VAT cov nyiaj them rov qab rau cov lag luam uas siv cov khoom siv rov ua dua yog kwv yees los txhawb cov nyiaj tau los ntawm 5.2 feem pua cov ntsiab lus.
Yav tom ntej Prospects
Nrog rau kev tawg ntawm cov tshuaj depolymerization tshuab, polypropylene zaj duab xis recycling yog hloov los ntawm "lub cev rov qab" mus rau "molecular rov qab." Cov txheej txheem catalytic cracking tsim los ntawm lub koom haum tshawb fawb hloov cov khoom pov tseg polypropylene rau hauv propylene monomer nrog 78% tawm los thiab 99.95% cov khoom purity. Los ntawm 2030, Tuam Tshoj tus PP zaj duab xis recycling tus nqi yuav tsum mus txog 45%, thiab cov ntaub ntawv rov ua lag luam loj tshaj 30 billion yuan, tsim ib tug ntsuab kev lag luam pawg ntawm pua pua billions ntawm yuan.
Xaus:
Recycling ntawm polypropylene zaj duab xis sawv cev rau kev sib ntaus sib tua tseem ceeb tiv thaiv "dawb paug." Los ntawm kev tsim kho thev naus laus zis, peb tuaj yeem kov yeej cov kev tsis sib haum xeeb no, kev ua kom huv huv thiab kev ua haujlwm tsis zoo, thiab tsim kom muaj kev tsim ua tiav -recycling-regeneration- daim ntawv thov saw, uas tuaj yeem tsis tsuas paub txog cov peev txheej, tab sis kuj tsim cov ntsiab lus kev loj hlob tshiab. Qhov no yuav xav tau kev sib koom tes los ntawm tsoomfwv, kev lag luam, thiab cov chaw tshawb fawb los hloov kev lag luam los ntawm kev tsim kho thev naus laus zis thiab muab Tuam Tshoj nrog cov kev daws teeb meem los daws cov pa phem thoob ntiaj teb.
