PET (polyethylene terephthalate) ndi polima wa thermoplastic wogwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana, monga kulongedza, nsalu, ndi uinjiniya.PET ili ndi zida zabwino kwambiri zamakina, zotenthetsera, komanso zowoneka bwino, ndipo zimatha kusinthidwanso ndikugwiritsidwanso ntchito pazinthu zatsopano.Komabe, PET ndi chinthu cha hygroscopic, zomwe zikutanthauza kuti imatenga chinyezi kuchokera ku chilengedwe, ndipo izi zingakhudze ubwino wake ndi ntchito yake.Chinyezi mu PET chingayambitse hydrolysis, yomwe ndi njira yamankhwala yomwe imaphwanya unyolo wa polima ndikuchepetsa kukhuthala kwamkati (IV) kwazinthuzo.IV ndi muyeso wa kulemera kwa maselo ndi kuchuluka kwa polymerization ya PET, ndipo ndi chizindikiro chofunikira cha mphamvu, kuuma, ndi kusinthika kwa zinthuzo.Chifukwa chake, ndikofunikira kuumitsa ndikuwumitsa PET musanayambe kutulutsa, kuchotsa chinyezi ndikuletsa kutayika kwa IV.
Infrared crystal dryer PET Granulationndi luso lamakono komanso lamakono lomwe limagwiritsa ntchito kuwala kwa infrared (IR) kuti ziume ndi kuwunikira ma flakes a PET mu sitepe imodzi, musanawadyetse ku extruder kuti apitirize kukonza.Kuwala kwa IR ndi mtundu wa ma radiation a electromagnetic omwe amakhala ndi kutalika kwapakati pa 0.7 ndi 1000 ma microns, ndipo amatha kuyamwa ndi PET ndi mamolekyu amadzi, kuwapangitsa kunjenjemera ndikupanga kutentha.Kuwala kwa IR kumatha kulowa mu PET flakes ndikuwotcha kuchokera mkati, zomwe zimapangitsa kuyanika kofulumira komanso kothandiza komanso kowumitsa makristalo kuposa njira wamba, monga kuyanika kwa mpweya wotentha kapena vacuum.
PET Granulation yowumitsira ma infrared crystal ili ndi maubwino angapo kuposa kuyanika kwachikhalidwe ndi njira zowunikira, monga:
• Kuchepetsa kuyanika ndi nthawi ya crystallization: Kuwala kwa IR kumatha kuuma ndi kusungunula PET flakes mu mphindi 20, poyerekeza ndi maola angapo ofunikira ndi njira zachizoloŵezi.
• Kuchepetsa mphamvu yogwiritsira ntchito mphamvu: Kuwala kwa IR kungathe kuumitsa ndi crystalline PET flakes ndi mphamvu ya 0.08 kWh / kg, poyerekeza ndi 0.2 mpaka 0.4 kWh / kg yomwe imafunidwa ndi njira zachizolowezi.
• Kuchepetsa chinyezi: Kuwala kwa IR kumatha kuuma ndi kuwunikira PET flakes ku chinyezi chomaliza chochepera 50 ppm, poyerekeza ndi 100 mpaka 200 ppm yomwe imapezeka ndi njira zodziwika bwino.
• Kuchepetsa kutaya kwa IV: Kuwala kwa IR kumatha kuuma ndi kusungunula ma flakes a PET ndi kuchepa kochepa kwa IV kwa 0.05, poyerekeza ndi 0.1 kwa 0.2 IV kutayika chifukwa cha njira zachizolowezi.
• Kuwonjezeka kwachulukidwe kachulukidwe: Kuwala kwa IR kungapangitse kuchuluka kwa PET flakes ndi 10 mpaka 20%, poyerekeza ndi kachulukidwe koyambirira, komwe kumapangitsa kuti ntchito ya chakudya ikhale yabwino komanso kutuluka kwa extruder.
• Kupititsa patsogolo khalidwe lazinthu: Kuwala kwa IR kumatha kuyanika ndi kuwunikira ma flakes a PET popanda kuchititsa chikasu, kuwonongeka, kapena kuipitsidwa, zomwe zimawonjezera maonekedwe ndi katundu wa zinthu zomaliza.
Ndi zabwino izi, infrared crystal dryer PET Granulation imatha kupititsa patsogolo magwiridwe antchito komanso mtundu wa PET extrusion, ndipo imatha kukwaniritsa zofunikira pakugwiritsa ntchito kalasi yazakudya.
Njira ya Infrared crystal dryer PET Granulation ingagawidwe m'magawo atatu: kudyetsa, kuyanika ndi crystallizing, ndi extruding.
Kudyetsa
Gawo loyamba la Infrared crystal dryer PET Granulation ndikudyetsa.Mu sitepe iyi, ma flakes a PET, omwe amatha kukhala osagonana kapena osinthidwanso, amadyetsedwa mu chowumitsira cha IR ndi screw feeder kapena hopper.Ma PET flakes amatha kukhala ndi chinyezi choyambirira mpaka 10,000 mpaka 13,000 ppm, kutengera komwe amachokera komanso momwe amasungira.Mlingo wodyetsa ndi kulondola ndi zinthu zofunika zomwe zimakhudza kuyanika ndi crystallization ntchito ndi khalidwe la mankhwala.
Kuyanika ndi Crystallizing
Gawo lachiwiri la Infrared crystal dryer PET Granulation ndikuwumitsa ndikuwumitsa.Mu sitepe iyi, ma flakes a PET amawonetsedwa ndi kuwala kwa IR mkati mwa ng'oma yozungulira, yomwe ili ndi njira yozungulira komanso zopalasa mkati mwake.Kuwala kwa IR kumatulutsidwa ndi banki yoyima ya IR emitters, yomwe ili pakatikati pa ng'oma.Kuwala kwa IR kumakhala ndi kutalika kwa 1 mpaka 2 ma microns, omwe amawongoleredwa ku mawonekedwe a mayamwidwe a PET ndi madzi, ndipo amatha kulowa mpaka 5 mm mu PET flakes.Kuwala kwa IR kumatenthetsa ma flakes a PET kuchokera mkati, zomwe zimapangitsa kuti mamolekyu amadzi asamasunthike ndipo mamolekyu a PET amanjenjemera ndikukonzanso mawonekedwe a crystalline.Mpweya wamadzi umachotsedwa ndi mpweya wozungulira womwe umadutsa m'ng'oma ndikuchotsa chinyezicho.Njira yozungulira ndi ma paddles amatumiza ma flakes a PET mozungulira ng'oma, kuwonetsetsa kuti kuwala kwa IR kumawoneka kofanana komanso kofanana.Njira yowumitsa ndi crystallizing imatenga pafupifupi mphindi 20, ndipo imapangitsa kuti chinyezi chomaliza chikhale chocheperapo 50 ppm ndi kutaya kochepa kwa IV kwa 0.05.Njira yowumitsa ndi kuwunikira imawonjezeranso kuchulukana kwa ma flakes a PET ndi 10 mpaka 20%, ndikuletsa chikasu ndi kuwonongeka kwa zinthuzo.
Kutulutsa
Gawo lachitatu komanso lomaliza la Infrared crystal dryer PET Granulation likutuluka.Mu sitepe iyi, zouma ndi crystallized PET flakes amadyetsedwa kwa extruder, amene amasungunula, homogenizes, ndi kuumba zinthu zofunika, monga pellets, ulusi, mafilimu, kapena mabotolo.The extruder akhoza kukhala single-screw kapena mapasa-screw mtundu, malingana ndi specifications mankhwala ndi zowonjezera ntchito.Extruder imathanso kukhala ndi mpweya wotsekemera, womwe umatha kuchotsa chinyezi chilichonse chotsalira kapena kusungunuka kuchokera kusungunuka.Njira yotulutsira imakhudzidwa ndi liwiro la screw, kasinthidwe ka screw, kutentha kwa mbiya, kufa geometry, ndi kusungunula rheology.Njira yowonjezera iyenera kukonzedwa kuti ikhale yosalala komanso yokhazikika, yopanda zilema, monga kusungunuka kwa fracture, kufa kutupa, kapena kusakhazikika.The extruding ndondomeko akhoza kutsatiridwa ndi pambuyo mankhwala ndondomeko, monga kuzirala, kudula, kapena kusonkhanitsa, malingana ndi mtundu mankhwala ndi zida pansi.
Mapeto
Infrared crystal dryer PET Granulation ndi ukadaulo watsopano komanso waukadaulo womwe umagwiritsa ntchito kuwala kwa IR kuumitsa ndikuwunikira ma flakes a PET mu sitepe imodzi, musanawadyetse ku extruder kuti apitilize kukonzanso.Ukadaulo uwu ukhoza kupititsa patsogolo magwiridwe antchito komanso mtundu wa PET extrusion, pochepetsa nthawi yowumitsa ndi kuwunikira, kugwiritsa ntchito mphamvu, chinyezi, komanso kutayika kwa IV, komanso kukulitsa kuchuluka kwazinthu komanso mtundu wazinthu.Ukadaulo uwu ungathenso kukwaniritsa zofunikira pazakudya, posunga IV ndikuletsa chikasu ndi kuwonongeka kwa PET.Ukadaulowu ukhoza kuthandizira kukhazikika komanso chuma chozungulira cha PET, pothandizira kukonzanso ndikugwiritsanso ntchito PET pazinthu zatsopano.
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Nthawi yotumiza: Jan-25-2024