Txoj kev tsim PVC: Vim li cas txoj kev ntawm cov thee lossis roj hloov txhua yam ntawm koj daim ntawv

PVC resin hmoov pub rau hauv kev lag luam extrusion kab - txoj kev tsim khoom tom qab cov khoom siv no ua txhua yam los ntawm tus nqi mus rau xim ruaj khov

Ntawm nplooj ntawv no

1. Ob txoj kev, ib lub molecule - thiab ib lo lus nug feem ntau buyers yeej tsis nug
2. Txoj kev thee chemistry: qhov kilowatt - teev nqi tiag tiag
3. Vim li cas ethylene -raws li resin tseem tshwm nyob rau hauv siab -end spec sheets?
4. Kev ncua, emulsion, thiab peb txoj kev tsis muaj leej twg kos duab
5. Los ntawm reactor mus rau daim ntawv nruj: qhov kev xaiv polymerization ua rau koj lub rooj tsavxwm ua npuas ncauj
6. Carbon ledger: qhov twg ob txoj kev mus ntsiag to

Taug kev mus rau hauv txhua lub khw kos npe, cov khoom siv vaj tsev, lossis cov chaw tsim khoom, thiab koj yuav pom cov ntaub ntawv PVC tawv uas zoo ib yam zoo ib yam hauv lub teeb fluorescent. Tib yam dawb paug. Tib tuab. Tib qhov ceev luam tawm ntawm daim ntawv lo spec. Qhov kev xav - tsim nyog, thiab tsis ncaj ncees lawm - yog tias cov khoom siv raw tom qab tag nrho yog los ntawm ntau dua lossis tsawg dua tib txoj kev lag luam. Nws tsis tau. Thiab qhov sib txawv ntawm ob txoj kev tsim khoom tseem ceeb tsim txhua yam hauv qab: yuav ua li cas cov ntawv extrudes, ntev npaum li cas nws cov xim tuav nyob rau hauv UV, dab tsi tshwm sim thaum CNC router ntsis hits nws ntawm 18,000 RPM.

Tsab ntawv no nthuav tawm dab tsi tshwm sim hauv cov reactors, furnaces, thiab cracking towers uas tsim cov resin ntws mus rau hauvPVC ua npuas ncauj boardextrusion kab thoob ntiaj teb. Qhov tseem ceeb tshaj, nws piav qhia tias yog vim li cas tus neeg yuav khoom uas nkag siab txog txoj kev tsim khoom muaj qhov ntug uas tus neeg yuav khoom tsuas yog sib piv tus nqi -ib - daim ntawv yeej tsis yuav.

I. Ob Factories, Ib Molecule - Thiab ib lo lus nug feem ntau buyers yeej tsis nug

Polyvinyl chloride yog polyvinyl chloride. Qhov rov ua dua -CH₂-CHCl- qaum qaum tsis hloov raws li thaj chaw. Chemists yuav lees paub qhov no. Tab sis txoj hauv kev los ntawm cov khoom noj nyoos mus rau cov saw hlau rov qab sib txawv heev ntawm txoj kev calcium carbide thiab txoj kev ethylene uas hu rau ob qhov txiaj ntsig "ib qho resin" yog technically muaj tseeb thiab ua lag luam yuam kev hauv qhov sib npaug sib npaug.

Txoj kev calcium carbide pib nrog cov thee thiab limestone rhuab nyob rau hauv hluav taws xob arc rauv ntawm roughly 2,000℃los tsim calcium carbide. Qhov nruab nrab reacts nrog dej kom tawm acetylene, uas tom qab ntawd ua ke nrog hydrogen chloride los ua vinyl chloride monomer. Txoj kev ethylene pib nrog naphtha los yog ethane tawg ntawm petrochemical complex, tsim ethylene uas reacts nrog chlorine los ua tib yam VCM. Tib lub hom phiaj. Radically txawv kev mus.

Ntawm no yog qhov spec daim ntawv tsis tshua tau ntes: txoj kev calcium carbide qhia cov kab tsis huv - sulfur compounds, phosphides, residual carbon particles - uas txoj kev ethylene feem ntau zam los ntawm kev pib los ntawm cov khoom noj khoom haus huv hydrocarbon. Cov kab mob no tsis tiv thaiv polymerization. Tab sis lawv zaum hauv cov khoom ua tiav lawm, thiab lawv ua rau cov thermal stability, xim pib, thiab ntev -cov huab cua huab cua nyob rau hauv txoj kev sib xyaw ua ke thoob plaws kev tsim khoom.

Ib tug zoo- tswj engineer ntawm ib daim ntawv extrusion cog ib zaug piav qhov txawv rau kuv li no: ua hauj lwm nrog carbide- txoj kev cob yog zoo li ua noj ua haus nrog dej kais dej uas tej zaum yuav muaj ib tug kab noj hniav; daim ntawv qhia tseem ua haujlwm, tab sis koj kawm kom them nyiaj rau qhov sib txawv uas ethylene- cov neeg siv tsis tas yuav xav txog. Qhov kev them nyiaj ntawd muaj tus nqi, thiab nws tshwm sim rau qee qhov chaw - nyob rau hauv pob khoom ruaj khov, kev pabcuam kev thauj khoom, lossis tus nqi tsis lees paub thaum kuaj zaum kawg.

Feem ntau cov neeg yuav khoom yeej tsis nug txog txoj kev twg lawv tus neeg muag khoom cov khoom siv los ntawm vim tias feem ntau cov neeg muag khoom tsis tuaj yeem pab dawb teb.

II. The Coal Chemistry Route: Yam Kilowatt -Tsev Nqi Tiag Tiag

Txoj kev calcium carbide dominates PVC ntau lawm nyob rau hauv cov cheeb tsam nrog ntau thee thiab txwv tsis pub nkag mus rau petrochemical infrastructure. Tuam Tshoj ib leeg suav txog kwv yees li 80% ntawm lub ntiaj teb carbide- txoj hauv kev PVC muaj peev xwm, tus lej uas cuam tshuam txog geology thiab kev lag luam txoj cai ntau dua li qhov muaj txiaj ntsig zoo tshaj plaws. Thaum ib lub teb chaws zaum ntawm qhov sib sib zog nqus thee reserves tab sis imports cov roj crude thiab cov kua roj ntsha tseem ceeb, cov lej ntawm cov carbide txoj kev yuav ua rau kev nom kev tswv tsis tuaj yeem txawm tias lub zog lej qhia ib zaj dab neeg sib txawv.

Cia peb ua raws li cov khoom siv tiag tiag. Limestone quarried los ntawm qhib- qhov mines yog calcined rau quicklime nyob ib ncig ntawm 900-1,000 degree, ces tov nrog coke los yog anthracite thiab muab tso rau hauv ib tug hluav taws xob arc rauv ntawm kub nce mus txog 2,200 degree. Lub cub tawg tsim cov calcium carbide molten, uas tom qab txias thiab crushing reacts nrog dej nyob rau hauv ib tug acetylene generator los tsim C₂H₂gas. Cov dej acetylene no dhau los ntawm kev ua kom huv si kom tshem tawm hydrogen sulfide thiab phosphine, ces nkag mus rau lub reactor nrog HCl los ua ke VCM. Tom qab ntawd lub VCM yog polymerized rau hauv PVC cob.

Cov kab ke ntawd kub hnyiab los ntawm lub zog ntawm tus nqi uas ua rau cov neeg xav tsis thoob uas tsuas yog saib ntawm daim ntawv tiav. Kev siv hluav taws xob zoo rau ib tuj ntawm carbide- txoj hauv kev PVC, suav txhua yam los ntawm limestone calcination los ntawm qhov kawg polymerization, thaj tsam ntawm 6,000 thiab 8,500 kWh nyob ntawm qhov ua tau zoo ntawm lub tshuab hluav taws xob thiab kev tsim hluav taws xob rov qab. Los ntawm kev sib piv, txoj kev ethylene siv kwv yees li ib nrab ntawm ib tuj ntawm VCM tsim. Qhov txawv tsis yog marginal - nws yog cov qauv, ua rau hauv cov thermodynamics ntawm kev rhuav tshem calcium -oxygen bonds ntawm ob txhiab degrees.

Cov los ntawm - cov khoom kwj qhia ib zaj dab neeg sib npaug. Rau txhua tuj ntawm PVC ua los ntawm txoj kev carbide, kwv yees li 1.5-1.8 tons ntawm calcium carbide slag tawm los ntawm acetylene tiam theem. Qhov alkaline sludge no yuav tsum tau muab pov tseg rau hauv vaj tse, thiab thaum qee cov nroj tsuag hloov mus rau cov cement kilns lossis kev tsim kho, lub nra hnyav yog qhov tiag. Txoj kev ethylene tsim cov khoom pov tseg tsawg dua ib tuj ntawm cov resin, txawm hais tias nws coj nws tus kheej ib puag ncig cov nyiaj them rau hauv daim ntawv ntawm cov khoom siv hluav taws xob sab saud.

Lub upside ntawm txoj kev carbide yog qhov muaj tseeb ntawm tus kheej -sufficiency. Ib lub teb chaws uas tsim nws lub peev xwm PVC ntawm cov thee thiab limestone tsis tas yuav txhawj xeeb txog tus nqi naphtha uas tshwm sim los ntawm kev siv hluav taws xob hauv Singapore lossis kev cuam tshuam ntawm thaj chaw hauv Strait of Hormuz. Cov khoom siv ntawd- kev ywj pheej ntawm cov saw hlau muaj txiaj ntsig zoo, uas yog vim li cas txoj hauv kev txuas ntxiv mus thiab loj hlob txawm tias nws lub zog- siv tsis zoo. Cov neeg yuav khoom ntawmPVC Advertising Boardtau los ntawm carbide- txoj hauv kev muab cov saw hlau tau txais txiaj ntsig los ntawm qhov kev ruaj ntseg ntawm tus nqi no, txawm tias lawv paub nws lossis tsis paub.

III. Vim li cas Ethylene-Raws li cov resin tseem tshwm nyob rau hauv siab -End Spec Sheets?

Yog tias koj rub cov ntaub ntawv cov ntaub ntawv rau PVC resin qib destined rau kev kho mob tubing, zaub mov- qib zaj duab xis, los yog nees nkaum- xyoo cov ntaub ntawv sab nrauv, qhov "txoj kev tsim khoom" teb - thaum nws tshwm ntawm tag nrho - yuav luag ib txwm nyeem "ethylene route" lossis "petrochemical route." Muaj ib qho laj thawj rau tus qauv no, thiab nws tsis yog kev lag luam.

Ethylene- txoj hauv kev PVC pib nrog cov khoom sib dua, huv dua. Cov txheej txheem ethane lossis naphtha tawg uas ua rau ethylene kuj ua rau cov kwj ntawm lwm cov khoom siv olefins, thiab cov ethylene feem tuaj yeem ua kom huv mus rau qib siab ua ntej nws nkag mus rau oxychlorination reactor los tsim ethylene dichloride, uas yog thermally tawg rau VCM. Txhua kauj ruam tshem tawm cov impurities uas txoj kev carbide qhia los yog tsis tshem tawm. Qhov tshwm sim yog VCM kwj nrog tsawg dua sab- cov khoom siv tshuaj tiv thaiv thiab cov khoom siv zaum kawg nrog ntsuas qhov ntsuas kub siab dua, qis qis qis qis qis qis dua, thiab qhov hnyav dua molecular faib.

Cov txiaj ntsig zoo rau cov tuam txhab cov ntawv: ethylene- txoj kev cob qhia tsis tu ncua muab cov gel suav qis dua, cov ntses tsawg dua - qhov muag tsis xws luag hauv daim ntawv calendered thiab extruded, thiab cov xim zoo dua thaum ua haujlwm siab - nrawm. Cov txiaj ntsig zoo sib xyaw ua ke raws li kab nrawm nce. Lub tshuab ua npuas dej niaj hnub extrusion kab khiav ntawm 4-6 meters ib feeb ua kom pom tseeb txhua qhov micro-variation nyob rau hauv cov resin - carbide- txoj kev batch nrog marginally siab volatile cov ntsiab lus los yog ib tug me ntsis dav particle loj faib yuav tsim ntau gauge variation thiab ntau nto defects tshaj li 10eenequiyl} cov xwm txheej zoo ib yam.

Tsis muaj qhov no ua rau carbide - txoj kev PVC siv tsis tau. deb ntawm nws. Tab sis nws txhais tau hais tias ua tiav qhov sib npaug ua tiav- cov khoom zoo los ntawm carbide- txoj kev cob qhia yuav tsum muaj cov qauv tsim qauv ntau dua - thermal stabilizer ntau dua, kev pab cuam ntau dua, kev tswj cov txheej txheem nruj dua - thiab cov khoom ntxiv ntawd ua rau cov khoom nyoos- cov khoom siv tau zoo dua. Txoj kev ethylene tus nqi them yog ib feem ntawm qhov tseeb (ntxuav chemistry) thiab ib feem ntawm kev xav txog kev siv zog petrochemical uas ua rau lub rooj nkag mus rau kev lag luam. Rau kev siv qhov twghluav taws kev ua tau zoo ntsuasthiab ntev - lub sij hawm xim tuav tsis yog - sib tham tau - sab nrauv vaj huam sib luag, siab - kawg cov duab duab, kho mob txee - cov spec yuav luag sau nws tus kheej mus rau txoj kev ethylene.

IV. Suspension, Emulsion, thiab Thib Peb Txoj Kev Tsis muaj leej twg daim duab

Txoj kev raw khoom txiav txim siab dab tsi nkag mus rau lub polymerization reactor. Txoj kev polymerization txiav txim siab dab tsi tawm los. Ob txheej txheej kev txiav txim siab no yog ywj siab - koj tuaj yeem khiav ncua kev polymerization ntawm ob qho tib si carbide- txoj kev lossis ethylene- txoj kev VCM - tab sis lawv cuam tshuam rau hauv txoj hauv kev uas ua rau qee qhov sib xyaw ua ke ntau dua hauv kev xyaum.

Suspension polymerization suav txog kwv yees li 80% ntawm ntiaj teb PVC ntau lawm. Cov chemistry yog lub tswv yim ncaj nraim: VCM cov tee dej tau tawg mus rau hauv dej nrog cov neeg ua haujlwm tshem tawm, ib qho dawb - radical pib pib, thiab polymerization tshwm sim hauv txhua tee dej li nws yog ib qho me me reactor. Cov nplej nplej uas ua tau yog kwv yees li 100-180 microns nyob rau hauv txoj kab uas hla, ntxeem tau txaus los nqus cov yas, thiab tuav zoo li dawb - ntws hmoov. Qhov no yog qib workhorse - cov resin uas pub cov yeeb nkab extrusion kab, profile tuag, thiab rigid sheet calenders thoob ntiaj teb.

Emulsion polymerization ua rau ntau qhov zoo dua - feem ntau 0.1 mus rau 2 microns - los ntawm kev siv cov surfactants kom stabilize cov tshuaj tiv thaiv nyob rau hauv ib theem aqueous. Cov kua txiv hmab txiv ntoo tuaj yeem muab tshuaj tsuag- ziab rau hauv cov hmoov zoo uas tawg yooj yim hauv cov yas yas, ua rau nws mus - rau kev xaiv rau plastisols siv rau hauv cov txheej, tawv tawv, cov ntaub pua tsev hnav khaub ncaws, thiab dip- cov khoom molded. Tsis muaj leej twg extrudes rigid ua npuas ncauj board los ntawm emulsion-qib PVC; cov particle morphology yog tsis ncaj ncees lawm rau qhuav{10}}kev sib tov thiab cov residual surfactant theem cuam tshuam nrog fusion.

Tom qab ntawd muaj bulk polymerization.

Bulk polymerization - qee zaum hu ua huab hwm coj polymerization - khiav cov tshuaj tiv thaiv hauv VCM uas tsis muaj dej, tsis muaj tshuaj tua kab mob, tsis muaj surfactants. Cov resin uas tshwm sim yog tshwj xeeb huv si, tsis muaj residual ncua kev kawm ntawv - tus neeg sawv cev txheej rau ntawm grain nto. Qhov no tseem ceeb rau qhov pom kev pom tseeb: bulk-polymerized PVC tuaj yeem tsim cov ntawv pob tshab nrog cov nqi taws kub hnyiab uas cov qhab nias ncua kev sib tw. Lub downside yog tias cov txheej txheem nyuaj rau tswj thermally, cov particle morphology tsis zoo li qub, thiab lub ntiaj teb no ntsia muaj peev xwm me me piv rau cov kab raug ncua. Koj pom ntau yam -polymerized PVC hauv niche pob tshab daim ntaub ntawv thiab nyob rau hauv tej yam siab - clarity rigid ntim hom, tab sis nws sawv cev rau tej zaum 10% ntawm lub ntiaj teb no ntau lawm thiab yog tsis zoo li yuav loj hlob heev vim hais tias ntawm lub peev nqi ntawm lub tsev tshiab bulk- txheej txheem cov nroj tsuag piv rau expanding muaj peev xwm ncua kev kawm ntawv.

Dab tsi tseem ceeb rau cov neeg yuav khoom yog qhov no: thaum koj xaj PVC ua npuas ncauj board, koj yuav luag tau txais kev ncua -polymerized resin, dhau S-PVC nrog K- tus nqi hauv 57-68 ntau yam. Tus K- tus nqi encodes qhov nruab nrab molecular hnyav - siab dua K txhais tau hais tias ntev chains, siab yaj viscosity, zoo mechanical zog, thiab ntau nyuaj ua. APVC txee boarduas yuav tsum tau tuav ib tug ntsia hlau tsis tawg yuav feem ntau siv resin nyob rau hauv lub Upper kawg nkaus ntawm K- tus nqi ntau, thaum lub sij hawm tshaj tawm lub rooj tsavxwm destined rau luv luv - lub sij hawm tso saib graphics siv tau qis dua -K resin uas extrudes sai dua thiab raug nqi tsawg dua ib kilogram.

V. Los ntawm Reactor rau Rigid Sheet: Qhov Kev Xaiv Polymerization Ua Li Cas rau Koj Lub Rooj Tswjhwm Saib Ua Npuas Ncauj

Lub sijhawm no cov lus nug tsim nyog tau nthuav tawm: yog tias yuav luag tag nrho cov PVC ua npuas ncauj board siv ncua kev kawm ntawv -polymerized resin, thiab K- tus nqi bracket yog nqaim nqaim, ntau npaum li cas cov ntaub ntawv raw - txoj kev tseem ceeb heev rau tus neeg unboxing ib pawg ntawm cov ntawv dawb hauv lub khw luam ntawv? Ntau tshaj li feem ntau cov ntaub ntawv kev lees paub.

Xav txog dab tsi tshwm sim thaum lub sij hawm ua npuas ncauj extrusion. Cov khoom xyaw qhuav - PVC resin, calcium carbonate muab tub lim, cua sov stabilizer, kev pab cuam, foaming agent, titanium dioxide, lubricants - nkag mus rau ntxaib - ntsia hlau extruder qhov twg nws yog compressed, rhuab, thiab plasticated rau hauv ib homogeneous yaj. Tus neeg sawv cev foaming decomposes ntawm lub qhov rais kub tshwj xeeb, tso pa roj uas nthuav cov yaj mus rau hauv cov qauv ntawm tes thaum nws tawm hauv qhov tuag. Cov ntawv kub, foamed ces dhau los ntawm lub calibrator uas teem lub nto tiav thiab tuab ua ntej txias thiab txiav.

Txhua qhov sib txawv ntawm cov saw hlau no cuam tshuam nrog cov resin thermal stability. Ib qho carbide- txoj kev cob qhia nrog kev ruaj ntseg me ntsis pib degrade ua ntej hauv keeb kwm tshav kub, tso cov kab HCl uas ua rau kom muaj kev puas tsuaj ntxiv nyob rau hauv ib qho autocatalytic kauv. Tus neeg teb xov tooj extruder them nyiaj los ntawm kev nce lub stabilizer loading, tab sis stabilizers yog cov khoom kim tshaj plaws hauv kev tsim. Nce lawv ntau dhau thiab tus nqi kom zoo dua ntawm carbide- txoj hauv kev nqaim nqaim. Nqa lawv tsawg dhau thiab cov ntawv tawm nrog lub ntsej muag liab lossis daj daj uas yuav dhau los ua qhov pom kev nrawm hauv qab lub teeb pom kev hauv tsev tab sis pom tseeb thaum muab tso rau ib sab ntawm qhov tseeb -dawb ethylene- cov qauv siv cov qauv.

Kev sib piv cov ntsiab lus ntawm ob qhov tseem ceeb ntawm PVC ntau lawm txoj kev hla kev ua haujlwm tseem ceeb. Cov nuj nqis hluav taws xob yog kwv yees qhov nruab nrab ntawm kev lag luam thiab sib txawv ntawm cov nroj tsuag tsim thiab hnub nyoog.

Muaj lwm qhov ntev uas cov neeg yuav khoom nrhiav pom los ntawm kev nyuaj: batch-rau-batch sib xws. Carbide-txoj kev cob qhia los ntawm cov chaw thee uas muaj cov hmoov tshauv sib txawv thiab cov qib sulfur ua cov resin nrog me ntsis tab sis tiag tiag ntau- mus rau - ntau qhov sib txawv. Ethylene-txoj kev cob qhia, kos los ntawm ntau homogeneous kua feedstock kwj, feem ntau muab nruj dua specifications nyob rau hauv ntau lawm campaigns. Rau lub khw luam ntawv khiav UV flatbed tshuab luam ntawv ntawm cov xov xwm nruj, qhov kev sib xws tau txhais ncaj qha rau hauv cov cwj mem ua kom pom tseeb thiab xim gamut. Rau ib tug kos npe rau routing complex duab, nws txhais tau hais tias tsawg dua cov npoo thiab tsawg rework. Cov no tsis yog cov khoom siv paub daws teeb meem-chain distinctions; lawv yog kab- cov khoom raug nqi ntawm tus thawj tswj kev tsim khoom cov ntawv tshaj tawm sib txawv txhua lub lim tiam.

Cov kev qhia tshwj xeeb uas cov chaw tsim khoom loj tau taug qab - YUPSENI suav nrog cov khoom siv -cov ntaub ntawv tshwj xeeb ntom ntom thiab daim tawv nqaij daim ntawv pov thawj hauv nwsPVC ua npuas ncauj boardcov ntaub ntawv tej pob khoom - yog qhov kev tshwm sim ntawm cov dej ntws los ntawm kev xaiv cov dej ntws ua ntej lub lim tiam dhau los thiab ntau txhiab mais deb. Tus neeg yuav khoom uas xav tau cov batch - cov ntaub ntawv qib yog, qhov tseeb, taug qab txoj kev tsim khoom yam tsis tas yuav paub txog cov tshuaj lom neeg los ntawm lub npe.

Tiav tiav PVC ua npuas ncauj board nplooj ntawv tos khoom xa tuaj - cov khoom kawg uas nqa cov ntaub ntawv pov thawj ntawm txhua qhov kev txiav txim siab ntau lawm

VI. Carbon Ledger: Qhov twg ob txoj kev mus ntsiag to

Kev sib piv ib puag ncig ntawm ob txoj hauv kev zoo li yuav raug teeb tsa raws li daim npav yooj yim: carbide txoj kev phem, ethylene txoj kev zoo dua. Qhov kev muaj tiag yog messier, thiab messiness tseem ceeb rau txhua tus neeg txiav txim siab yuav khoom uas yuav raug tshuaj xyuas raws li qhov yuav tsum tau ua ntawm carbon accounting.

Txoj kev carbide txoj kev siv cov pa roj carbon monoxide yog undeniable. Ua ib tuj ntawm calcium carbide nyob rau hauv ib tug hluav taws xob arc rauv tawm roughly 1.1-1.3 tons ntawm CO₂ncaj qha, thiab thaum koj ntxiv cov emissions los ntawm cov thee- hluav taws xob fais fab nroj tsuag uas feem ntau muab lub cub tawg hluav taws xob, tag nrho cov pa roj carbon hneev taw ib tuj ntawm PVC tuaj yeem tshaj 5-7 tons ntawm CO₂sib npaug. Qhov ntawd yog tus lej hnyav - hnyav dua li cov neeg yuav khoom feem ntau xav, thiab hnyav txaus uas nws yuav nyiam cov kev cai tswj hwm raws li cov pa roj carbon pricing mechanisms nthuav.

Txoj kev ethylene tshaj tawm txo cov txheej txheem ncaj qha emissions ib tuj ntawm VCM, tab sis qhov kev sib piv no nres ntawm lub rooj vag Hoobkas. Rub tus ciam teb rau sab nraud kom suav nrog kev rho tawm cov roj av sab saud, qhov ntev -nplooj naphtha shipping, thiab kev ua haujlwm ntawm refinery, thiab daim duab plooj. Txoj kev ethylene qhov zoo ntawm ib puag ncig yog qhov tseeb tab sis nqaim dua li cov ntsiab lus sib piv qhia, thiab nws nyob ntawm qhov hnyav ntawm seb cov khoom noj ethylene los ntawm cov kua roj ntsha (ntxuav) lossis naphtha los ntawm hnyav dua (dirtier).

Dab tsi yuav luag tsis tshwm sim hauv cov kev sib tham no yog cov khoom uas tsis tau ua. PVC tsev khoom -PVC qab nthab panels, sab nrauv cladding, qhov rais profiles,SPC pem teb- nquag tshem cov ntaub ntawv nrog cov pa roj carbon ntau dua lub neej: gypsum uas yuav tsum tau tua hluav taws thiab tsim cov khib nyiab pov tseg, txhuas nrog nws cov staggering thawj smelting zog xav tau, hardwood harvested los ntawm qeeb - loj hlob tropical hom. Kev sib piv cov pa roj carbon ncaj ncees yuav tsum suav qhov kev xaiv. PVC tsis yog carbon-lub teeb nyob rau hauv cov ntsiab lus kiag li. Tab sis thaum qhov hloov pauv tau raug rho tawm los ntawm av nplaum, smelted hlau, lossis qub - ntoo loj hlob, daim ntawv hloov pauv hauv txoj hauv kev uas cov kev tshawb fawb txog kev ua neej nyob tsuas yog pib ua kom muaj nuj nqis.

Kev lag luam qhov tseeb decarbonization lever - thiab qhov no yog qhov uas txoj kev carbide ntsib nws cov lus nug nyuaj tshaj - nyob rau hauv daim phiaj hluav taws xob. Ib qho ethylene- txoj kev cog ntoo siv los ntawm kab sib chaws nrog kev nkag mus txuas ntxiv tuaj yeem txiav nws qhov Scope 2 emissions loj heev. Ib qho carbide- txoj kev cog, nrog nws cov hluav taws xob loj heev qab los noj mov hauv cov kauj ruam arc rauv, tsis tuaj yeem decarbonize kom txog thaum daim phiaj ua. Qhov kev cia siab ntawm cov qauv no txhais tau hais tias ob txoj hauv kev yuav sib txawv ntxiv ntawm cov pa roj carbon ntau li daim phiaj ntsuab, tsis sib koom ua ke. Yog xav paub ntxiv txog yuav ua li cas PVC haum rau hauv kev sib tham txog kev ruaj ntseg, kev tshuaj xyuas hauvpeb qhov kev ntsuam xyuas recyclabilitytshawb txog cov khoom kawg- ntawm- lub neej dimension - lwm ib nrab ntawm cov pa roj carbon sib npaug uas ntau lawm- txoj kev sib tham yuav tsis quav ntsej.

Qhov twg Chemistry nres thiab kev txiav txim siab yuav pib

Txoj kev tsim khoom qab ntawm daim ntawv PVC tsis yog qhov tsis tseem ceeb. Nws yog encoded nyob rau hauv cov ntaub ntawv tus cwj pwm nyob rau hauv tshav kub, nyob rau hauv UV, nyob rau hauv ib tug router me ntsis, thiab nyob rau hauv lub qeeb tshuaj siege ntawm raug uas hloov ib co nplooj ntawv dawb beige nyob rau hauv kaum yim hli thaum lwm tus tuav lawv cov xim rau ib xyoo caum. Cov neeg yuav khoom feem ntau yuav tsis tas yuav hais cov tshuaj tiv thaiv oxychlorination lossis kos duab hluav taws xob hluav taws xob hluav taws xob. Tab sis lawv yuav tsum paub tias "PVC ua npuas ncauj board, dawb, 3mm" tsis yog ib qho khoom piav qhia - nws yog qhov pom ntawm qhov pom tsis pom kev lag luam uas cov ceg ntoo ntawm cov khoom nyoos- theem thiab tsis muaj kev sib tshuam.

Cov neeg muag khoom tsim nyog ua haujlwm nrog yog cov uas tuaj yeem taug qab qhov nkhaus rau koj, tsis yog nrog kev lag luam lus hais txog "zoo tshaj plaws" tab sis nrog cov ntaub ntawv batch, resin - qhov chaw pob tshab, thiab txaus siab los tham txog kev tsim qauv lag luam - tawm hauv cov lus cog tseg. Chemistry yog complex. Lub hauv paus ntsiab lus ntawm kev yuav khoom tsis yog: paub tias koj tab tom yuav dab tsi, thiab paub tias daim ntawv pheej yig tshaj yuav luag tsis qhia tag nrho cov dab neeg txog qhov twg nws tuaj.

Qee lub sij hawm - tej zaum yuav sai dua li qhov kev lag luam xav tau - carbon accounting moj khaum thiab cov ntawv pov thawj lub tsev ntsuab yuav pib nug cov khoom tsim tawm - cov lus nug uas feem ntau cov saw hlau tam sim no zam. Thaum hnub ntawd los txog, cov neeg yuav khoom uas tau nqis peev rau lub sijhawm kom nkag siab txog calcium carbide-rau-ethylene spectrum yuav muaj cov lus teb npaj. Txhua leej txhua tus yuav scrambling hu rau lawv tus neeg muag khoom.