Dej-cooled pelletizing thiab cua-cooled pelletizing yog ob txoj kev granulation hauv kev ua cov polymers (xws li yas thiab roj hmab). Lawv qhov sib txawv tseem ceeb nyob hauv qhov nruab nrab cua txias thiab cov txheej txheem ntws, uas cuam tshuam ncaj qha rau cov yam ntxwv ntawm cov pellet, kev ua haujlwm ntau lawm, thiab cov xwm txheej siv tau.
Hauv qab no yog kev sib piv ntawm lawv qhov sib txawv tseem ceeb:
| Sib piv Aspects | Dej-txias pelletizing | Cua -cooled pelletizing |
|
Txias nruab nrab |
Dej (feem ntau yog circulating dej txias) | Cua txias (cua txias cua) |
| Txheej txheem khiav | Melt yog extruded los ntawm cov tuag → Tam sim ntawd txiav los ntawm lub cutter → Kub pellets poob rau hauv lub tank dej kom ceev ceev txias thiab solidification → Undergo dehydration / centrifugal drying → tiav pellets tau txais | Melt yog extruded los ntawm cov tuag → Txiav los ntawm lub rotating cutter → Pellets yog txias thiab solidified nyob rau hauv cov huab cua kwj → poob ncaj qha mus rau hauv lub collector (tsis muaj ziab yuav tsum tau) |
| Txias efficiency | Siab heev. Cov dej muaj kev hloov pauv sai sai, ua rau cov pellets ua kom khov sai sai, ua rau nws haum rau siab - kub thiab cov khoom nplaum. | Tsawg heev. Huab cua muaj kev hloov pauv hluav taws xob qeeb, ua rau lub sijhawm txias txias thiab feem ntau ntev dua cov kab ntau lawm. |
| Pellet zoo thiab zoo | Puab: Feem ntau yog kwv yees li cylindrical, kheej kheej, lossis teardrop-puab. Nto: Kev ntxhov siab yuav tshwm sim vim qhov txias txias, uas tuaj yeem cuam tshuam rau pob tshab lossis glossiness. Kev ziab: yuav tsum tau ziab kom huv si, vim tias cov dej seem seem yuav cuam tshuam rau kev ua haujlwm tom ntej. |
Puab: Tsis tu ncua thiab niaj hnub cylindrical lossis cuboid pellets. Nto: Smooth thiab uniform, tsis muaj residual ya raws teeb meem. Cutter lub neej: Ua kom tsawg tsawg rau tus txiav. |
| System complexity thiab nqi | System Complexity: Sib npaug complex. Nws xav tau kev txhim kho cov dej ntws, pom, thiab ziab tshuab. Kev siv hluav taws xob: Cov txheej txheem ziab kom qhuav ua kom muaj zog siv zog. Kev Kho: Nws suav nrog kev daws teeb meem xws li kev tswj dej kom zoo, kev tiv thaiv nplai, thiab kev kho dej khib nyiab. |
System Complexity: Yooj yim. Tsis tas yuav tsum muaj kev kho dej lossis khoom siv ziab. Kev siv hluav taws xob: Feem ntau yog los ntawm lub tshuab cua tshuab, feem ntau qis dua tag nrho lub zog siv. Kev Kho: Yooj yim, tsis muaj teeb meem dej zoo. |
| Cov khoom siv thiab cov khoom siv | Advantageous Applications: High - kub melts (piv txwv li, PA, PET, tej yam xws li engineering plastics). Oxidation- cov ntaub ntawv yooj yim thiab nplaum. Cov khoom siv nrog cov kev xav tau siab rau qhov txias txias. Siab - cov kab ntau lawm. |
Advantageous Applications: Cov dej noo- cov ntaub ntawv rhiab heev (piv txwv li, qee qib ntawm ABS, PC). Cov ntaub ntawv xav tau pellets nrog cov khoom zoo thiab cov duab tsis tu ncua. Cov kab ntau lawm nrog cov zis nruab nrab mus rau me me lossis nquag hloov xim. |
| Environmental Impact | Nws siv cov khoom siv dej thiab tuaj yeem tsim cov dej khib nyiab uas yuav tsum tau kho. | Tsis muaj dej khib nyiab tsim, ua rau nws zoo ib puag ncig, txawm tias nws yuav ua rau kiv cua nrov. |
Sib piv Aspects
Dej-Txias Pelletizing: Lub hauv paus ntsiab lus tseem ceeb yog "quenching ceev". Nws ua tau zoo, yuam kom txias txias los ntawm dej, ua rau nws haum rau siab - kub, siab - viscosity, thiab cov ntaub nplaum nplaum uas muaj peev xwm tso zis ntau. Txawm li cas los xij, qhov system yog qhov nyuaj thiab yuav tsum tau ua kom qhuav.
Cua-Cooled Pelletizing: Lub hauv paus ntsiab lus tseem ceeb yog "slow cooling". Nws ua kom maj mam, maj mam txias los ntawm huab cua, tsim cov pellets nrog cov khoom zoo, du nto, thiab tsis muaj dej-txog teeb meem. Lub kaw lus yog qhov yooj yim thiab tus phooj ywg ib puag ncig, tab sis nws muaj qhov ua haujlwm txias txias thiab feem ntau qis dua qhov muaj peev xwm.