Kev Taw Qhia: Tom qab kev lag luam MDI hauv tsev tau mus rau lub tsev rau khoom ntawm qib siab hauv lub Tsib Hlis, qhov kev poob qis hauv lub Rau Hli txuas ntxiv mus zom cov khoom tiav lawm thiab cov khoom siv raw, MDI ntshiab los ntawm ob lub hlis ntawm kev tshem tawm, kev lag luam slurry downstream tau pib yuav lub hom phiaj, nyob rau hauv qhov pib ntawm kev thov, tuaj yeem pab MDI ntshiab kom nce mus rau sab saud?

Cov nqi hloov pauv hauv qhov ntau thiab tsawg thiab txuas ntxiv zom cov khoom muag hauv zej zog

Xyoo 2023, tus nqi ntawm MDI ntshiab nyob ntawm qhov chaw sib piv ntawm yuav luag peb xyoos, nrog rau qhov chaw hloov pauv tag nrho. Txawm li cas los xij, txij li nruab nrab Lub Plaub Hlis, tus nqi lag luam ntawm MDI ntshiab tau nce qeeb qeeb thiab txuas ntxiv tswj tus nqi siab ntawm lub xyoo, tab sis tus nqi tseem nyob ntawm qhov qis ntawm tib lub sijhawm hauv xyoo dhau los. Ntawm theem nqi no, sab kev thov yog qhov dav dav, kev txiav txim siab txuas ntxiv mus, thiab cov khoom muag tiav hauv theem thaum ntxov tau zom. Ntawm theem no, cov khoom muag hauv zej zog txuas ntxiv zom, thiab cov khoom muag hauv qab kuj tau nkag mus rau qib qis.

Qhov kev poob txij nkawm tsis tu ncua qis, uas yog qhov zoo rau sab kev lag luam

Shanghai Lianheng 35+ 240,000 tons / xyoo niam cawv cog tau pib kho dua tshiab txij li Lub Rau Hli 11, cuam tshuam rau Shanghai Huntsman thiab Shanghai BASF kho kom zoo, thiab ntxiv rau kev txhawb nqa kev txij nkawm, Ningbo theem I 400,000 tons / xyoo cog kaw kev txij nkawm, theem II 800,000 tons / xyoo cog qis tsis zoo, ntxiv rau Fujian cog tsis zoo, tswj hwm li 50% ntawm kev thauj khoom. Lub 600,000-ton / xyoo chav tsev hauv Shanghai tau txo qis vim muaj teeb meem khoom siv raw pem hauv ntej. Ntau pawg ntawm kev txij nkawm khoom siv + kev cuam tshuam tsis zoo, MDI tag nrho cov khoom thauj tsuas yog khaws cia li 60%, thiab txij li Lub Peb Hlis, MDI tag nrho cov khoom thauj txuas ntxiv poob qis, thiab tus nqi ua haujlwm hauv Lub Rau Hli thiab Lub Xya Hli tsuas yog khaws cia li 60%.

Qhov kev thauj khoom hauv qab nce qeeb qeeb, thiab qhov kev nce ntawm cov slurry yog qhov pom tseeb tshaj plaws

Thaum lub Tsib Hlis, tag nrho cov kev thov hauv qab dej siab heev. Ntawm lawv, cov khoom siv slurry tseem nyob li ntawm 60%, cov kua dej ib leeg tseem nyob li ntawm 5-60%, TPU load tseem nyob li ntawm 70%, thiab spandex load tseem nyob li ntawm 7-8%. Txawm li cas los xij, nrog rau lub zog siv tsawg ntawm lub davhlau ya nyob twg mus rau hauv lub tsev rau khoom, kev nce ntawm cov xaj hauv tsev rau khoom, cov xaj thov tsis muaj zog hauv nruab nrab thiab lig lub Tsib Hlis, nkag mus rau theem zom zaub mov, thiab cov txiaj ntsig tag nrho hauv qab dej tsis zoo, cov kua dej ib leeg, TPU kev lag luam tag nrho tus nqi lag luam qis, cov txiaj ntsig me me, ua rau tsis muaj kev ntseeg siab hauv qab dej, cov ntim lag luam tsawg uas tsav los ntawm kev tswj hwm ntawm cov khoom thauj, kev hloov pauv me ntsis hauv cov khoom thauj. Tab sis qhov kev cia siab rau kev lag luam yav tom ntej tseem tsis zoo. Thiab kev lag luam spandex vim muaj cov khoom muag ntau, qhib lub xeev tsis zoo, kev thov tau txo qis. Ntawm lawv, cov khoom siv slurry yuav yog li ntawm 4-5 feem pua, cov kua dej ib leeg yuav raug tswj hwm ntawm 5 feem pua, TPU load yuav raug tswj hwm ntawm li ntawm 5-6 feem pua, thiab spandex load yuav raug tswj hwm ntawm li ntawm 7 feem pua. Txawm li cas los xij, nrog rau nruab nrab thiab lig Lub Rau Hli, tus nqi lag luam ntawm cov khoom siv slurry, cov khoom lag luam ib leeg, spandex thiab TPU tau nkag mus rau qhov qis, tom qab kev zom cov khoom muag mus rau qhov qis, cov khoom siv raw BDO thiab AA pib ua tiav, kev txaus siab yuav khoom nce ntxiv, thiab kev ua lag luam kawg nce ntxiv vim yog qhov zoo ntawm tus nqi, kev txaus siab yuav khoom kub hnyiab, qhov kev thauj khoom qis dua maj mam nce, tshwj xeeb tshaj yog qhov kev thov ua lag luam slurry kom ua raws li qhov nce ntxiv pom tseeb dua.

Xav txog cov khoom muag qis tam sim no, kev siv cov khoom siv txij nkawm, thiab txoj kev npaj txij nkawm mus sij hawm ntev ntawm cov khoom siv txawv teb chaws, Hungary's Borst Chemical Company MDI device (350,000 tons / xyoo) tau pib tso tseg kev tsim khoom thaum Lub Xya Hli 18 rau kev txij nkawm thiab kev hloov pauv thiab kev nthuav dav, thiab nce mus txog 400,000 tons / xyoo tom qab kev hloov pauv. Nws xav tias kev txij nkawm yuav siv sijhawm li 80 hnub, thiab sab khoom yuav khaws cia qis. Sab kev thov superposed pib ua theem, thiab lub zog txhawb nqa theem hauv thaj teb kub, lossis cuam tshuam rau lub sijhawm luv luv MDI ntshiab chaw ntawm lub ntiajteb txawj nqus. Txawm li cas los xij, lub peev xwm siv tag nrho ntawm kev lag luam davhlau ya nyob twg tsis zoo, thiab cov khoom siv txij nkawm MDI ntshiab khaws cia ib feem ntawm txoj kev npaj tsav tsheb hauv nruab nrab thiab lig lub hlis, thiab lub khw muag khoom yuav tsum nce me ntsis lossis cuam tshuam rau qhov hloov pauv amplitude thiab lub sijhawm ntev, thiab txuas ntxiv ua raws li qhov kev thov nce thiab kev hloov pauv ntim khoom hauv lub sijhawm tom qab.