Taw qhia: Tom qab kev lag luam hauv tsev ntshiab MDI tau mus rau lub tsev khaws khoom ntawm qib siab hauv lub Tsib Hlis, qhov kev poob qis hauv lub Rau Hli txuas ntxiv mus zom cov khoom tiav cov khoom muag thiab cov khoom siv raw khoom, ntshiab MDI los ntawm ob lub hlis ntawm destocking, downstream slurry lag luam tau pib yuav. kev xav, raws li qhov pib ntawm kev thov, tuaj yeem pab dawb huv MDI kom nce siab?

Cov nqi hloov pauv hauv qhov nqaim thiab txuas ntxiv mus zom cov khoom lag luam hauv zej zog

Xyoo 2023, tus nqi ntawm MDI ntshiab yog nyob ntawm qhov chaw txheeb ze ze li ntawm peb lub xyoos, nrog rau qhov chaw hloov pauv tag nrho. Txawm li cas los xij, txij li thaum nruab nrab Lub Plaub Hlis, tus nqi lag luam ntawm cov ntshiab MDI tau nce qeeb thiab txuas ntxiv tuav tus nqi siab ntawm lub xyoo, tab sis tus nqi tseem nyob ntawm qhov qis ntawm tib lub sijhawm hauv xyoo dhau los. Nyob rau theem no tus nqi, qhov kev thov sab yog feem ntau, qhov kev txiav txim ua raws li txuas ntxiv, thiab cov khoom muag ntawm cov khoom tiav nyob rau theem pib yog digested. Nyob rau theem no, cov khoom lag luam kev sib raug zoo txuas ntxiv mus zom, thiab cov khoom muag hauv qab kuj tau nkag mus rau theem qis.

Kev saib xyuas tsis tu ncua tsis tu ncua, uas yog qhov zoo rau cov khoom lag luam sab

Shanghai Lianheng 35+ 240,000 tons / xyoo niam cawv cog tau pib kho txuas ntxiv txij lub Rau Hli 11, cuam tshuam rau Shanghai Huntsman thiab Shanghai BASF rectification cog, thiab ntxiv rau kev txhawb nqa, Ningbo theem I 400,000 tons / xyoo cog kev kaw haujlwm, theem II 800,000 tons / xyoo cog kev ua haujlwm tsis zoo, ntxiv rau Fujian cog kev ua haujlwm tsis zoo, tuav txog 50% ntawm on-load. Lub 600,000-tuj / xyoo chav nyob hauv Shanghai tau txo vim muaj teeb meem ntawm cov khoom siv raw khoom. Ntau cov khoom siv tu + kev cuam tshuam tsis zoo, cov khoom siv hauv tsev MDI tag nrho tsuas yog khaws cia txog 60%, thiab txij li lub Peb Hlis, cov ntshiab MDI tag nrho cov khoom txuas ntxiv poob qis, thiab kev khiav hauj lwm tus nqi nyob rau lub Rau Hli thiab Lub Xya Hli tsuas yog khaws cia txog 60%.

Lub downstream load nce qeeb, thiab slurry nce yog qhov pom tseeb tshaj plaws

Nyob rau hauv lub Tsib Hlis, tag nrho cov load ntawm downstream xav tau siab heev. Ntawm lawv, cov slurry load yog khaws cia ntawm li 60%, ib qho kua load yog khaws cia ntawm 5-60%, TPU load yog khaws cia ntawm li 70%, thiab spandex load yog khaws cia ntawm 7-8%. Txawm li cas los xij, nrog kev txwv tsis pub siv hluav taws xob ntawm lub davhlau ya nyob twg rau hauv lub tsev khaws khoom, qhov nce ntawm cov khoom xa tuaj, qhov kev xav tau tsis muaj zog nyob rau nruab nrab thiab lig Tsib Hlis, nkag mus rau theem digestion, thiab cov nyiaj poob qis tag nrho cov txiaj ntsig tsis zoo, qhov qis qis slurry, ib leeg. kua, TPU kev ua lag luam tag nrho cov nqi lag luam qis qis, cov txiaj ntsig me me, ua rau tsis muaj kev ntseeg siab qis qis, qis kev lag luam ntim tau tsav los ntawm kev saib xyuas ntawm cov khoom thauj, kev hloov pauv me ntsis hauv kev thauj khoom. Tab sis qhov kev cia siab rau lub lag luam yav tom ntej tseem tsis tshua muaj kev cia siab. Thiab kev lag luam spandex vim muaj cov khoom muag siab, qhib lub xeev tsis zoo, kev thov tau poob qis. Ntawm lawv, slurry load yuav yog li ntawm 4-5 feem pua, cov kua ib leeg yuav tsum tau khaws cia ntawm 5 feem pua, TPU load yuav tsum tau khaws cia li ntawm 5-6 feem pua, thiab spandex load yuav tsum tau khaws cia li ntawm 7 feem pua. Txawm li cas los xij, nrog rau nruab nrab thiab lig Lub Rau Hli, kev lag luam tus nqi ntawm slurry, ib qho khoom lag luam, spandex thiab TPU nkag mus rau qhov qis qis, tom qab cov khoom muag digestion mus rau qhov qis qis, cov khoom siv raw BDO thiab AA tau pib ua tiav, kev yuav khoom tau nce, thiab lub davhlau ya nyob twg ua lag luam tau nce vim tus nqi kom zoo dua, kev yuav khoom zoo siab tuaj, qhov qis qis qis nce ntxiv, tshwj xeeb tshaj yog cov slurry kev lag luam thov kom ua raws li qhov nce ntxiv pom tseeb.

Xav txog qhov tam sim no cov khoom lag luam tsis tshua muaj kev sib raug zoo, kev siv cov khoom siv tu, thiab cov phiaj xwm kev saib xyuas mus sij hawm ntev ntawm cov khoom siv txawv teb chaws, Hungary's Borst Chemical Company MDI ntaus ntawv (350,000 tons / xyoo) tau pib tso tseg kev tsim khoom thaum Lub Xya Hli 18 rau kev saib xyuas thiab kev hloov pauv thiab nthuav dav. , thiab nce mus rau 400,000 tons / xyoo tom qab kev hloov pauv. Nws cia siab tias kev saib xyuas yuav siv sijhawm li 80 hnub, thiab cov khoom siv sab nrauv yuav tuav qis qis. Qhov xav tau superposed pib nyob rau hauv theem, thiab theem boost quab yuam nyob rau hauv lub tshav kub kub, los yog cuam tshuam rau lub sij hawm luv luv dawb huv MDI qhov chaw ntawm lub ntiajteb txawj nqus. Txawm li cas los xij, tag nrho cov peev txheej ntawm kev lag luam davhlau ya nyob twg tsis zoo, thiab cov khoom siv tu MDI ntshiab khw muag khoom ib feem ntawm txoj kev npaj tsav tsheb nyob rau nruab nrab thiab lig lub hlis, thiab lub khw muag khoom yuav tsum nce me ntsis los yog cuam tshuam qhov hloov pauv amplitude thiab lub sijhawm ntev. , thiab txuas ntxiv ua raws li qhov xav tau nce thiab cov khoom ntim hloov pauv hauv lub sijhawm tom qab.