Iindaba

I-PET (i-polyethylene terephthalate) yipolymer ye-thermoplastic esetyenziswa ngokubanzi kwizicelo ezahlukeneyo, ezifana nokupakishwa, iingubo kunye nobunjineli. I-PET inomatshini obalaseleyo, i-thermal, kunye ne-optical properties, kwaye inokuphinda isetyenziselwe imveliso entsha. Nangona kunjalo, i-PET ikwayinto ye-hygroscopic, oku kuthetha ukuba ithatha umswakama ovela kwindalo, kwaye oku kunokuchaphazela umgangatho kunye nokusebenza kwayo. Ukufuma kwi-PET kunokubangela i-hydrolysis, okuyi-chemical reaction eqhekeza amaketanga e-polymer kunye nokunciphisa i-viscosity yangaphakathi (IV) yezinto. IV ngumlinganiselo wobunzima bemolekyuli kunye neqondo lepolymerization yePET, kwaye sisalathisi esibalulekileyo samandla, ukuqina, kunye nokuqhubekeka kwezinto. Ke ngoko, kubalulekile ukomisa kunye nokuqaqambisa i-PET ngaphambi kokukhutshwa, ukususa ukufuma kunye nokuthintela ukulahleka kwe-IV.

I-infrared crystal dryer PET Granulationyinoveli kunye nobuchwepheshe obutsha obusebenzisa ukukhanya kwe-infrared (IR) ukomisa kunye nokuqaqambisa iiflakes ze-PET kwinyathelo elinye, ngaphambi kokuzondla kwi-extruder ukuze ziqhubeke nokusebenza. Ukukhanya kwe-IR luhlobo lwemitha ye-electromagnetic radiation enobude obuphakathi kwe-0.7 kunye ne-1000 ye-microns, kwaye inokufunxwa yi-PET kunye neemolekyuli zamanzi, zibangele ukuba zingcangcazele kwaye zenze ubushushu. Ukukhanya kwe-IR kunokungena kwiiflake ze-PET kwaye kuzifudumeze ngaphakathi, okukhokelela ekomisweni okukhawulezayo nangokufanelekileyo kunye ne-crystallization kuneendlela eziqhelekileyo, ezifana nomoya oshushu okanye ukomisa i-vacuum.

I-infrared crystal dryer PET Granulation ineengenelo ezininzi ukomisa ngokwesiko kunye neendlela zokucwebezela, ezinje:

• Ukuncitshiswa kokumisa kunye nexesha le-crystallization: Ukukhanya kwe-IR kunokomisa kwaye kufake i-PET flakes kwimizuzu ye-20, xa kuthelekiswa neeyure eziliqela ezifunekayo ngeendlela eziqhelekileyo.

• Ukusetyenziswa kwamandla okucuthayo: Ukukhanya kwe-IR kunokomisa kwaye kukhazimle i-PET flakes kunye nokusetyenziswa kwamandla kwe-0.08 kWh / kg, xa kuthelekiswa ne-0.2 ukuya kwi-0.4 kWh / kg efunwa ngeendlela eziqhelekileyo.

• Isiqulatho sokufuma esincitshisiweyo: Isibane se-IR singomisa kwaye siqaqambise iiflakes ze-PET ukuya kumxholo wokufuma wokugqibela ongaphantsi kwe-50 ppm, xa kuthelekiswa ne-100 ukuya kwi-200 ppm ephunyezwe ngeendlela eziqhelekileyo.

• Ukunciphisa ukulahleka kwe-IV: Ukukhanya kwe-IR kunokomisa kwaye kufake i-PET flakes kunye ne-IV encinci yokulahleka kwe-0.05, xa kuthelekiswa ne-0.1 ukuya kwi-0.2 IV ilahleko ebangelwa iindlela eziqhelekileyo.

• Ukunyuka kobuninzi bobuninzi: Ukukhanya kwe-IR kunokunyusa ubuninzi be-PET flakes nge-10 ukuya kwi-20%, xa kuthelekiswa nobuninzi bokuqala, okuphucula ukusebenza kokutya kunye nemveliso ye-extruder.

• Ukuphuculwa komgangatho wemveliso: Ukukhanya kwe-IR kunokomisa kwaye kukhazimle iiflakes ze-PET ngaphandle kokubangela ukutyheli, ukuthotywa, okanye ukungcoliseka, okwandisa inkangeleko kunye neempawu zeemveliso zokugqibela.

Ngezi nzuzo, i-infrared crystal dryer PET Granulation inokuphucula ukusebenza kakuhle kunye nomgangatho we-PET extrusion, kwaye inokuhlangabezana neemfuno zezicelo zebakala lokutya.

Inkqubo ye-Infrared crystal dryer PET Granulation inokwahlulwa ibe ngamanyathelo amathathu aphambili: ukondla, ukomisa kunye nekristali, kunye nokukhupha.

Ukutya

Inyathelo lokuqala le-infrared crystal dryer PET Granulation iyondla. Kule nyathelo, i-PET flakes, enokuthi ibe yintombi okanye isetyenziswe kwakhona, ifakwe kwi-IR dryer nge-screw feeder okanye i-hopper. I-PET flakes ingaba nomswakama wokuqala ukuya kwi-10,000 ukuya kwi-13,000 ppm, kuxhomekeke kumthombo kunye neemeko zokugcina. Izinga lokutya kunye nokuchaneka zizinto ezibalulekileyo ezichaphazela ukomisa kunye nokusebenza kwe-crystallization kunye nomgangatho wemveliso.

Ukomisa kunye neCrystallizing

Isinyathelo sesibini se-Infrared crystal dryer PET Granulation iyomisa kwaye i-crystallizing. Kule nyathelo, i-PET flakes ibonakaliswe ekukhanyeni kwe-IR ngaphakathi kwegubu elijikelezayo, elinomzila ojikelezayo kunye neepaddles ngaphakathi kwayo. Ukukhanya kwe-IR kukhutshwa yibhanki emileyo ye-IR emitters, ebekwe embindini wegubu. Ukukhanya kwe-IR kunobude obuyi-1 ukuya kwi-2 microns, eguqulelwe kwi-spectrum yokufunxa i-PET kunye namanzi, kwaye inokungena kwi-5 mm kwi-PET flakes. Ukukhanya kwe-IR kutshisa i-PET flakes ukusuka ngaphakathi, kubangela ukuba iimolekyuli zamanzi zibe ngumphunga kwaye ii-molecule ze-PET zingcangcazele kwaye zilungelelanise kwakhona kwisakhiwo se-crystalline. Umphunga wamanzi ususwa ngumjelo womoya ojikelezayo, othi utyhutyhe kwigubu uze uthabathe ukufuma. Umjelo ojikelezayo kunye neepaddles zihambisa i-PET flakes ecaleni kwe-axis ye-drum, iqinisekisa i-uniform kunye ne-homogeneous exposure ekukhanyeni kwe-IR. Inkqubo yokomisa kunye ne-crystallizing ithatha malunga nemizuzu engama-20, kwaye iphumela kumswakama wokugqibela ongaphantsi kwe-50 ppm kunye nokulahlekelwa kwe-IV encinci ye-0.05. Inkqubo yokomisa kunye ne-crystallizing iphinda ikhulise ubuninzi bee-PET flakes nge-10 ukuya kwi-20%, kwaye ikhusela ukuphuzi kunye nokuthotywa kwezinto.

Ukukhupha

Inyathelo lesithathu kunye nelokugqibela le-Infrared crystal dryer PET Granulation iyaphuma. Kweli nyathelo, iiflakes zePET ezomisiweyo kunye nekristalisiweyo zondliwa kwi-extruder, enyibilikayo, i-homogenizes, kwaye ibumbe imathiriyeli kwiimveliso ezifunwayo, ezinjengeepellets, iifiber, iifilimu, okanye iibhotile. I-extruder ingaba yi-screw enye okanye uhlobo lwe-twin-screw, kuxhomekeke kwiinkcukacha zemveliso kunye nezongezo ezisetyenzisiweyo. I-extruder nayo inokuxhotyiswa nge-vacuum vent, enokususa nayiphi na intsalela yomswakama okanye i-volatiles kwi-melt. Inkqubo extruding iphenjelelwa isantya screw, uqwalaselo screw, lobushushu umphanda, die geometry, kunye nenyibilika rheology. Inkqubo ye-extruding kufuneka iphuculwe ukufezekisa i-extrusion egudileyo kwaye ezinzileyo, ngaphandle kweziphene, ezifana ne-melt fracture, i-fae swell, okanye i-dimensional instability. Inkqubo ye-extruding nayo ingalandelwa yinkqubo emva kokunyanga, njengokupholisa, ukusika, okanye ukuqokelela, kuxhomekeke kuhlobo lwemveliso kunye nezixhobo ezisezantsi.

Ukuqukumbela

I-infrared crystal dryer I-PET Granulation yinoveli kunye netekhnoloji entsha esebenzisa ukukhanya kwe-IR ukomisa kunye nokuqaqambisa iiflake ze-PET kwinyathelo elinye, ngaphambi kokuzondla kwi-extruder ukuze ziqhubeke nokusebenza. Le teknoloji inokuphucula ukusebenza kakuhle kunye nomgangatho we-PET extrusion, ngokunciphisa ixesha lokumisa kunye ne-crystallization, ukusetyenziswa kwamandla, umxholo wokufuma, kunye nokulahlekelwa kwe-IV, kunye nokwandisa ubuninzi bobuninzi kunye nomgangatho wemveliso. Le teknoloji inokuphinda ihlangabezane neemfuno zezicelo zebakala lokutya, ngokugcina i-IV kunye nokukhusela i-yellowing kunye nokuthotywa kwe-PET. Le teknoloji inokuba negalelo kuzinzo kunye noqoqosho lwesetyhula ye-PET, ngokuvumela ukuhlaziywa kunye nokusetyenziswa kwakhona kwe-PET kwiimveliso ezintsha.

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