Ngemva kokuba isici sokuhlunga ikhandlela sisetshenziswe isikhathi esithile emugqeni wokuphotha we-filament, sizovinjelwa ukungcola, futhi umehluko wengcindezi phakathi kwe-inlet ne-outlet yesistimu yokuhlunga ye-polymer encibilikayo uzokwanda, futhi lezi zihlungi zekhandlela ezicwebezelayo zidinga zihlanzwe ngaphambi kokuthi ziphinde zisetshenziswe.Ukuhlanza ikakhulukazi kusetshenziswa izindlela ezingokwenyama nezamakhemikhali ukwenza i-calcine, ukuncibilikisa, ukwenza i-oxidize noma i-hydrolyze i-polymer enamathelayo ekushiseni okuphezulu, bese kugeza amanzi, ukuwasha nge-alkali (asidi) nokuhlanza nge-ultrasonic.
Izindlela zokuhlanza zihlanganisa: indlela yokubala, ukugeza usawoti, indlela ye-tri-ethylene glycol, indlela yokushisa ephezulu ye-hydrolysis, indlela yombhede we-alumina fluidized, kanye nendlela yokuhlanza i-vacuum.Njengamanje, izindlela zokuhlanza ezivame ukusetshenziswa kakhulu yindlela ye-tri-ethylene glycol, indlela yokushisa ephezulu ye-hydrolysis, nendlela yokuhlanza i-vacuum.
Indlela ye-tri-ethylene glycol iwukusebenzisa isimiso sokuthi i-polymer ingancibilika nge-tri-ethylene glycol endaweni yokubilisa ye-tri-ethylene glycol (285 ° C ngengcindezi evamile) ukuze kuzuzwe injongo yokuhlanza.Isinyathelo sokuhlanza ukubeka into ezohlanzwa ethangini le-tri-ethylene glycol elinesistimu yokufudumeza, iphakamise ukusuka ekamelweni lokushisa ifinyelele cishe ku-265 ° C, igcine ifudumele amahora angu-6, bese uyiyeka iphole ifike ku-100 ° C. ngokwemvelo, khipha into ezohlanzwa, futhi uyifake Kuyigeze ethangini lamanzi ashisayo cishe ku-95 ° C cishe imizuzu engu-20, bese uyicwilisa ngesisombululo se-NaOH esingu-10% ekushiseni kuka-60-70 ° C. Amahora angu-12, bese ugeza ngamanzi ashisayo.Uma kuyi-spinneret kanye nesici sokuhlunga esincibilikayo, ukuhlanzwa kwe-ultrasonic kuyadingeka.Indawo yokuhlanza ingamanzi ahlanzekile ekushiseni kuka-60-70°C.Isikhathi sokuhlanza siyimizuzu eyi-15-20 futhi ekugcineni siphephethwa ngomoya ocindezelweyo.
I-high-temperature hydrolysis method iwukusebenzisa i-polymer ukuze i-hydrolyzed kalula futhi i-alkaline hydrolyzed ekushiseni okuphezulu ukukhiqiza izinto ezisezingeni eliphansi, ukuze kuzuzwe inhloso yokususwa.Kuwukubeka into ezohlanzwa ku-autoclave, i-feed steam ye-0.3-0.6MPa, izinga lokushisa lingaba ngu-130-160 ° C, futhi isikhathi amahora angu-2-8.Ku-autoclave, uma inani elincane le-NaOH lengeziwe, isikhathi sokuhlanza singafinyezwa, bese ukugeza kwamanzi, ukugeza kwe-alkali, nokuhlanza kwe-ultrasonic kungasetshenziswa.
Indlela yokuhlanza i-vacuum ibizwa nangokuthi indlela ye-vacuum pyrolysis.Umgomo wayo wokusebenza owokuqala ukhuphule izinga lokushisa libe ngu-300 ° C futhi uligcine lifudumele isikhathi esithile ukuze uncibilikise i-polyester noma amanye ama-polymers aphezulu endaweni yokusebenza okufanele icutshungulwe, futhi impahla encibilikisiwe iphuma futhi ikhishwe.Bese ushisa, cishe ku-350 ° C, i-polyester esele iqala ukubola, ngalesi sikhathi, vula iphampu ye-vacuum ukuze iphume, ukushisa kufika ku-500 ° C, futhi uhlale ufudumele.Ngesikhathi esifanayo, inani elincane lomoya lingeniswa ukuze lifake i-oxidize insalela.Esimweni se-vacuum, ukubola okushisayo kanye nokubola kwe-oxidative ye-polyester esele kuyashesha, futhi igesi ekhiqiziwe kanye nezinhlayiya zomlotha ziyamuncwa ukuze kufezwe injongo yokuhlanza.
Isikhathi sokuthumela: Aug-01-2023