Screw Combination: Yuav kom phim qhov zoo tshaj plaws Granulation Solution rau koj cov ntaub ntawv
Hauv thaj teb ntawm cov yas granulation, cov khoom siv kho vajtse feem ntau suav hais tias yog lub hauv paus, tab sis qhov tseeb txiav txim siab qhov zoo, muaj peev xwm ntau lawm, thiab lub zog noj qab haus huv ntawm cov khoom tiav yog feem ntau cov txheej txheem ntawm cov ntsia hlau cov khoom. Rau cov lag luam uas nrhiav kev tiv thaiv ib puag ncig, tus nqi siab -kev ua tau zoo, thiab sim txeeb lub sijhawm hauv kev tshawb fawb cov ntaub ntawv tshiab thiab kev ua lag luam thoob ntiaj teb, kev nkag siab txog lub hauv paus ntsiab lus ntawm cov ntsia hlau ua ke yog los ua tus tswv "tus ntsuj plig" ntawm extruder zoo.
Kab lus no txais yuav cov qauv pyramid, los ntawm cov ntsiab lus xaus rau cov ntsiab lus ua tau zoo, txhawm rau txheeb xyuas seb yuav xaiv qhov zoo tshaj plaws co rotating ntxaib ntsia hlau extruder rau cov ntaub ntawv, pab koj ua tiav cov nqi txo thiab kev txhim kho hauv txhua kauj ruam ntawm cov yas granulation.
1, Cov ntsiab lus xaus: Ntsia hlau ua ke yog "thawj lub hauv paus ntsiab lus" ntawm cov yas extruder granulation zoo
Nyob rau hauv cov txheej txheem ntxaib ntsia hlau extrusion, cov ntsia hlau tsis yog ib qho yooj yim conveying cuab yeej, tab sis ib tug "tshuaj reactor" uas integrates cov khoom conveying, melting, mixing, shearing, tso, thiab siab tsev. Raws li 2024 "Plastics Recyclers Europe" ntawv dawb, nyob rau hauv cov yas granulation ntau lawm kab, lub zog pov tseg los ntawm tsis tsim nyog ntsia hlau ua ke tsim muaj peev xwm ncav cuag li 15% -20%, thiab ncaj qha cuam tshuam lub tensile zog thiab xim uniformity ntawm cov khoom tiav.
Rau cov lag luam siv co rotating ntxaib ntsia hlau extruders, cov ntsia hlau ua ke txiav txim siab qhov chaw nyob lub sij hawm faib, shear npaum li cas, thiab sib tov lub zog ntawm cov ntaub ntawv nyob rau hauv lub chim. Kev xaiv tsis raug tuaj yeem ua rau tsis sib xws thiab sib xyaw ua ke (ua rau cov pob dub), tshem tawm tsis tiav ntawm cov volatiles (ua rau npuas), lossis ntau dhau shearing ua rau cov saw hlau tawg ( cuam tshuam rau cov khoom siv tshuab).
Ib lo lus tseem ceeb: Tsis muaj "universal" ntsia hlau ua ke, tsuas yog modular tsim raws li cov ntaub ntawv tshwj xeeb.
2, Txheej txheej tsom xam: Yuav ua li cas los daws peb qhov teeb meem loj granulation los ntawm kev sib xyaw ua ke ntawm cov ntsia hlau
2.1 Hais txog "kub rhiab heev thiab bio raws li cov ntaub ntawv tshiab": tsim ib qho qis shear, siab ntim tau yooj yim
Kev lag luam keeb kwm yav dhau: Nrog rau kev nruj ntawm cov ntsiab lus yuav tsum tau siv rau cov khoom siv rov ua dua tshiab thiab cov khoom siv biobased raws li European Union Txoj Cai Tseem Ceeb Raw Materials Act (CRMA), cov neeg siv khoom thoob ntiaj teb tau nrawm lawv cov kev sim siv cov kua dej ntau dhau los yog kub kub cov ntaub ntawv tshiab xws li PLA, PBAT, PET cov ntaub ntawv rov ua dua tshiab, thiab lwm yam.
teeb meem tseem ceeb:
Q: Vim li cas kuv thiaj li muaj qhov daj lossis qhov hnyav ntawm molecular poob thaum siv co rotating ntxaib ntsia hlau extruder los ua PLA cov ntaub ntawv tsis zoo?
A: Qhov teeb meem nyob rau hauv lub zog shear ntawm cov ntsia hlau tivthaiv. Kev sib txhuam cov cua sov tsim los ntawm cov khoom siv ib txwm siv thiab lub zog shear ntawm kneading blocks tau yooj yim ua rau qhov kub thiab txias ntawm cov ntaub ntawv thermosensitive kom dhau tus qauv. Txoj kev daws teeb meem yog siv kev sib xyaw ua ke ntawm cov hniav txhuam hniav (TME) thiab nqaim kneading blocks (iPadOS 5 degree) hauv thaj tsam melting kom nce ntim pauv kev ua tau zoo thaum txo qis kev ntxhov siab. Lub modular ntsia hlau tsim ntawm Nanjing Kelongwell Chemical Machinery Co., Ltd. tso cai rau cov neeg siv khoom hloov "tsawg shear module" cais rau cov thermal rhiab heev seem. Cov ntaub ntawv sim qhia tau hais tias qhov kev teeb tsa no tuaj yeem txo qis qhov ntsuas daj (YI) ntawm PLA granulation li ntawm 30%, thaum khaws cov viscosity siab dua qhov nruab nrab molecular hnyav.
2.2 Hais txog "siab filling thiab nqi-cov mis zoo": ntxiv dag zog rau kev sib xyaw ua ke thiab ua kom muaj peev xwm ntau lawm
Cov ntaub ntawv kev lag luam: Hauv kev hloov kho cov yas, qhov feem pua ntawm inorganic fillers xws li calcium carbonate thiab talc hmoov tau tawg los ntawm cov tsoos 20% mus rau 50% lossis ntau dua. Raws li Lub Ntiaj Teb Hloov Kho Plastics Market Insights tso tawm los ntawm IHS Markit, qhov kev loj hlob muaj peev xwm ntawm kev ua tiav qib siab masterbatch yuav ncav cuag 8.2% los ntawm 2025, tab sis nws ua rau muaj kev sib tw loj rau qhov sib txawv ntawm cov yas extruders.
teeb meem tseem ceeb:
Q: Yuav ua li cas los daws cov teeb meem ntawm "ntses ob lub qhov muag" thiab cov pob dawb thaum ua siab concentration dub masterbatch lossis siab filling PP?
A: Qhov no yog ib qho kev tshwm sim ntawm dispersed mixing tsis ua hauj lwm. Nyob rau hauv ib tug npaum extruder, fusion zone thiab mixing cheeb tsam yuav tsum tau tsim raws li ib tug ua ke ntawm siab shear zog thiab siab rau pem hauv ntej conveying muaj peev xwm. Nws raug nquahu kom siv kneading blocks (KB90 degree) nrog staggered kaum ntawm 90℃thiab thim rov qab threaded ntsiab los tsim ib cheeb tsam siab shear kev nyuaj siab, thiab siv tensile rheology los rhuav cov aggregates ntawm cov muab tub lim. Cov ntaub ntawv qhia tau hais tias optimized ntsia hlau ua ke yuav txo tau cov dispersion ntawm siab filling cov ntaub ntawv (kuaj los ntawm optical microscopy) los ntawm 150 μ m mus rau hauv qab no 30 μ m, thiab nce ib lub tshuab muaj peev xwm ntau lawm los ntawm 12% -15%.
2.3 Hais txog "cov khoom siv thoob ntiaj teb ib puag ncig tus phooj ywg rov ua dua tshiab": ua kom zoo dua cov pa kom zoo kom tsis muaj ntxhiab lossis npuas
Txoj cai keeb kwm yav dhau: Nyob rau lub Plaub Hlis 2024, European Parliament tau dhau qhovNtim thiab ntim pov tseg txoj cai (PPWR), uas yuav tsum tau los ntawm 2030, tag nrho cov ntim yas yuav tsum muaj tsawg kawg yog 10% -35% tom qab cov neeg siv khoom siv cov ntaub ntawv rov qab. Cov neeg siv khoom thoob ntiaj teb muaj cov kev cai nruj heev rau kev purity thiab VOC (volatile organic compound) residue ntawm recycled granulation.
teeb meem tseem ceeb:
Q: Thaum ua cov khoom siv PCR (cov neeg siv khoom siv cov khoom siv rov qab), muaj ib txwm micropores thiab cov ntxhiab tsw zoo hauv cov khoom tom qab granulation. Yuav daws qhov teeb meem no li cas?
A: Lub hauv paus tseem ceeb yog tsim kom muaj qhov sib npaug ntawm qhov "tag nrho cov melting seem" thiab "loj ntim seem seem". Cov ntsia hlau ua ke yuav tsum tau nruab nrog cov khoom siv rov qab los yog cov xov sib khi rau pem hauv ntej ntawm qhov chaw nres nkoj kom ntseeg tau tias cov khoom tau yaj tag thiab tsim kom muaj lub siab - siab foob ua ntej nkag mus rau hauv qhov chaw tso pa, tiv thaiv cov khoom molten los ntawm "tawm tawm". Nyob rau tib lub sijhawm, cov hlau lead loj threaded conveying Cheebtsam (xws li 72/72) yuav tsum tau siv nyob rau hauv qhov chaw tso pa kom nce qhov ntim pub dawb thiab koom tes nrog cov chaw nres nkoj sab nraud kom ua tiav cov volatilization. Cov yas granulation ntau lawm kab ntawm Nanjing Kelongwell Chemical Machinery Co., Ltd. muab "dual nqus tsev vacuum + muaj zog sealing ntsia hlau configuration" tov rau cov kev xav tau. Nws tau raug txheeb xyuas tias nws tuaj yeem txo cov seem monomer cov ntsiab lus hauv cov khoom siv rov ua dua kom qis dua 50ppm, uas ua tau raws li cov cai ntawm EU REACH txoj cai.
3, Kev xaiv lub tswv yim: "peb-kauj ruam" txoj cai golden rau cov khoom sib xws
Rau cov neeg siv khoom thoob ntiaj teb uas yog cov tshiab rau kev sib hloov ntxaib ntsia hlau extruders thiab lub ntsej muag nyuaj cov qauv, tsuas yog ua raws li peb cov kauj ruam hauv qab no kom ceev nrooj kaw hauv qhov kev daws teeb meem:
Kauj Ruam 1: Txhais qhov "rheological tus kheej" ntawm cov khoom
·High fluidity (xws li PA6, PP, PE): Nws yog ib qho tsim nyog yuav tsum tau hais txog lub siab lub tsev muaj peev xwm, ua kom qhov ntev ntawm cov khoom xa tuaj, txo qhov kev faib ua feem ntawm cov khoom shearing, thiab tiv thaiv tshaj shearing.
·Tsawg fluidity (xws li PVC, UHMWPE, siab filling system): Kev tsom xam yuav tsum tau muab tso rau ntawm kev pub noj muaj peev xwm thiab dispersibility, siv cov hlau lead loj los ua kom cov pob txha kneading, tab sis lub sij hawm ncov shear yuav tsum tau tswj.
Kauj Ruam 2: Qhia meej txog "lub hom phiaj ua haujlwm" ntawm granulation
·Yooj yim dyeing / filling: siv ib qho kev sib xyaw ua ke ntawm tus qauv 45℃kneading blocks thiab threaded conveying ntsiab, nrhiav siab yield rau cov zis piv.
·Cov tshuaj tiv thaiv extrusion / alloy compatibility: Kev sib xyaw tshwj xeeb ntawm cov hniav txhuam hniav (TME) thiab kev sib hloov zoo thiab tsis zoo kneading blocks yog siv los txuas ntxiv lub sijhawm nyob thiab txhim kho qhov sib xyaw ua ke.
Kauj ruam 3: Txheeb xyuas qhov "txheej txheem qhov rai" ntawm cov khoom siv
Siv cov software simulation (xws li ntsia hlau sib xyaw CFD tsom xam) los kwv yees qhov kub thiab txias ntawm cov khoom hauv lub thoob. Cov kws tshaj lij kev lag luam (xws li Nanjing Kelongwell Chemical Machinery Co., Ltd.) yuav muab cov neeg siv khoom nrog "cov ntaub ntawv txheej txheem parameter", uas simulates ua ntej seb qhov kub siab tshaj qhov kub ntawm cov khoom siv degradation raws li cov qauv muab los ntawm cov neeg siv khoom.
4, Cov kws tshaj lij Q&A: Hauv qhov tob Q&A ntawm Screw Combination thiab Efficient Extruder
Q1: Puas yog nws zoo dua kom muaj qhov sib piv loj dua (L / D) ntawm cov ntsia hlau hauv co rotating ntxaib ntsia hlau extruder?
A: Tsis yog tiag. Lub nam piv yuav tsum tau sib phim nrog cov ntsia hlau ua ke. Rau granulation ntawm cov khoom siv rov ua dua tshiab uas tsuas yog xav tau kev sib xyaw yooj yim, L / D piv ntawm 36: 1-40: 1 txaus; Tab sis rau cov ntaub ntawv hloov kho uas xav tau cov iav fiber reinforcement, devolatilization, los yog reactive extrusion, yuav tsum tau teem ib tug ntev rau txoj kab uas hla piv ntawm 48: 1 los yog txawm 52: 1. Qhov muag tsis pom kev nce qhov nam piv yuav ua rau kom poob torque thiab cov khoom siv thermal degradation txaus ntshai.
Q2: Yuav ua li cas sib npaug qhov kev xav tau ntawm "kev tiv thaiv ib puag ncig" thiab "muaj peev xwm tsim khoom"?
A: Tsim nrog lub siab torque gearbox thiab lub teeb yuag screws. Qib torque ntawm niaj hnubsiab -efficiency extruderstau mus txog ntau dua 15 Nm / cm ³ (tus qauv kev lag luam). Siab torque tso cai rau cov khoom siv hluav taws xob muaj txiaj ntsig zoo los ntawm kev sib txuas ntawm cov ntsia hlau hauv qis - qhov kub thiab txias, hloov cov thermal melting yooj yim. Cov ntaub ntawv qhia tau hais tias lub tswv yim ntawm "hloov thermal zog nrog txhua lub zog" tuaj yeem txo cov khoom siv hluav taws xob los ntawm 15% -20% piv rau cov txheej txheem ib txwm muaj, thaum txo cov pa roj carbon hneev taw, ua kom tau raws li qhov xav tau ntawm ib puag ncig.
Q3: Yuav ua li cas thiaj txo tau cov nqi sim thiab qhov yuam kev thaum siv cov khoom xyaw tshiab thawj zaug?
A: Pom zoo siv "lub tsev thaiv" ntsia hlau qauv. Xaiv cov neeg muag khoom xws li Nanjing Kelongwell Chemical Machinery Co., Ltd. uas muab cov khoom siv ntsia hlau modular. Nyob rau hauv thawj theem, nws yog configured nyob rau hauv ib tug tsib theem raws li tus qauv ntawm "kev thauj mus los melting dispersion tso siab tsev"; Hauv kev ua kom zoo dua tom qab, tsuas yog qee qhov me me ntawm cov pob zeb sib tsoo lossis cov hniav txhuam hniav hauv nruab nrab qhov sib xyaw yuav tsum tau hloov, tsis tas yuav hloov cov ntsia hlau tag nrho, uas tuaj yeem txuag tau li 70% ntawm cov nqi kho kom zoo.
5, Xaus
Niaj hnub no, raws li cov yas extruders txav mus rau kev txawj ntse, kev kho kom zoo, thiab kev txhim kho ntsuab, kev sib txuas ntawm cov ntsia hlau tau hloov pauv los ntawm cov khoom siv tshuab yooj yim mus rau cov neeg nqa khoom ntawm cov txheej txheem tshiab. Txawm hais tias ntsib kev cuam tshuam ib puag ncig hauv kev ua lag luam thoob ntiaj teb lossis tsis paub tseeb hauv cov khoom siv tshiab tshawb fawb thiab kev tsim kho, xaiv cov txheej txheemco rotating ntxaib ntsia hlau extrudersnrog rau siab torque, modularity, thiab meej rheological tsim yog tus yuam sij los xyuas kom meej tias koj tuav technologies thawj coj nyob rau hauv lub teb ntawm yas granulation.
Nanjing Kelongwell Chemical Machinery Co., Ltd. yog ib txwm cog lus los muab cov ntsia hlau ua ke optimization kev daws teeb meem raws li cov yam ntxwv ntawm cov khoom siv, pab txhua tus neeg siv khoom thoob ntiaj teb uas nrhiav kev ua tau zoo los nrhiav kev pom zoo rau cov txiaj ntsig macro hauv micro ntiaj teb ntawm granulation.
