Lub Nplhaib Tuag Pellet Zeb rau Ntoo Pellet Ua Haujlwm Li Cas?

Dec 26, 2025

cov ntsiab lus

Lub hauv paus ntsiab lus ua haujlwm ntawm lub nplhaib me me tuag ntoo pellet ua tshuab tseem yog "extrusion molding," tab sis los ntawm cov qauv tsim ntawm "ntiv nplhaib tuag tig + ntau- siab rau cov menyuam extrusion," nws ua tiav ntau dua qhov muaj peev xwm thiab ruaj khov. Tag nrho cov txheej txheem ua haujlwm tau muab faib ua tsib theem tseem ceeb. Thawj theem yog cov khoom siv raw khoom txias thiab pretreatment, qhov sib txawv tseem ceeb ntawm lub nplhaib tuag tshuab thiab lub tshuab tuag. Tom qab pretreatment, cov ntoo pellets nkag mus rau hauv cov cuab yeej thiab thawj zaug mus rau hauv chav tsev txias. Lub nplawm paddle hauv chav txias kom huv si sib xyaw cov khoom siv raw nrog qhov tsim nyog ntawm chav dej (lossis dej), stabilizing cov dej noo ntawm cov khoom siv raw ntawm 13% -16%, thaum tib lub sijhawm nce qhov kub ntawm 80-95 degrees. Conditioning ntxiv softens lub lignin, tsub kom lub viscosity ntawm cov khoom raw, thiab txo cov hnav ntawm cov orifices tuag, ncua cov cuab yeej lifespan.

Qhov thib ob theem yog kev faib khoom sib xws thiab ua ntej - nias. Cov khoom siv raw khoom nkag mus rau hauv lub xovxwm chamber thiab sib npaug sib npaug ntawm cov phab ntsa sab hauv ntawm lub nplhaib tuag thiab lub siab rollers los ntawm kev sib hloov khoom noj. Ntiv nplhaib tuag presses feem ntau feature 2-4 siab rollers symmetrically faib nyob rau hauv lub nplhaib tuag. Kev sib hloov ceev ntawm cov khoom noj khoom noj yog qhov sib txuam nrog qhov nrawm ntawm lub nplhaib tuag thiab lub siab chais, kom ntseeg tau tias lub zog tsis sib xws ntawm txhua tus menyuam thiab cov khoom siv raw khoom txaus, tiv thaiv cov khoom siv hauv zos los yog hnav los ntawm kev sib hloov. Thaum lub sij hawm ua ntej - compression, cov khoom siv raw yog pib compressed, tshem tawm qee qhov cua los npaj rau kev kub siab extrusion tom ntej.

Qhov thib peb theem yog siab -siab extrusion thiab sib sib zog nqus densification. Lub cev muaj zog tsav lub nplhaib tuag kom tig ntawm kev kub ceev (feem ntau 20-50 rpm) ntawm lub gearbox. Lub siab rollers tig passively nyob rau hauv kev sib txhuam quab yuam ntawm lub nplhaib tuag, tsim kom muaj zog extrusion quab yuam (txog 15-25 MPa, ho siab dua li ntawm lub tiaj tuag presses). Nyob rau hauv kev kub siab, lignin nyob rau hauv cov ntaub ntawv raw softens considerably, thiab cov voids ntawm hais yog kiag li tshem tawm, uas ua rau ib tug ntau ntawm ceev ceev (txog 1.1-1.3 g / cm³). Nyob rau tib lub sijhawm, kev sib txhuam cov cua sov tsim tawm thaum lub sij hawm extrusion, ua ke nrog qhov kub thiab txias los ntawm cov txheej txheem pib txias, ntxiv rau cov viscosity ntawm cov khoom siv raw, ua kom ruaj khov ua cov khoom.

Qhov thib plaub theem yog tuag forming thiab nruam paug nyob rau hauv lub nplhaib tuag ntoo pellet ua tshuab. Nyob rau hauv kev kub siab, cov khoom siv raw yog raug thawb mus rau hauv qhov tuag qhov ntawm lub puab phab ntsa ntawm lub nplhaib tuag. Lub qhov tuag yog ib qho los ntawm - qhov tsim, thiab cov khoom siv raw ua ib qho kev sib txuas txuas ntxiv nyob rau hauv qhov tuag qhov, uas yog ces extruded los ntawm sab nraud ntawm lub nplhaib tuag. Vim tias lub nplhaib tuag tig tsis tu ncua, cov khoom siv raw tuaj yeem nkag mus rau hauv qhov tuag qhov thiab extruded, ua tiav kev tsim khoom tas li. Qhov no yog qhov laj thawj tseem ceeb rau lub peev xwm siab ntawm lub nplhaib tuag tshuab. Lub extruded columnar duab yog ntev ntev, tsis tas yuav tsum tau ntxiv cutter (qee cov qauv yog nruab nrog cutters kom nplua -tu ncua ntev raws li qhov yuav tsum tau muaj).

Qhov thib tsib theem yog tiav cov khoom txias thiab tshuaj ntsuam. Cov pellets tsis tu ncua extruded yog nyob rau ntawm qhov kub siab (80-100 degree) thiab yuav tsum tau nkag mus rau qhov sib txuam kom txias kom txias rau chav sov los ntawm huab cua txias kom tiv thaiv cov pellets los ntawm absorbing noo noo. Tom qab txias, cov pellets dhau los ntawm cov cuab yeej tshuaj ntsuam xyuas kom tshem tawm qee qhov xoob, tawg, thiab cov pellets tsis tsim nyog, ua rau muaj kev ua tau zoo - cov khoom tiav. Kev ua haujlwm siab ntawm lub nplhaib tuag tshuab tso siab rau kev sib koom ua ke ntawm nws cov ntsiab lus tseem ceeb. Lub nplhaib tuag yog ua los ntawm siab - lub zog, hnav-tiv taus cov khoom nrog siab tuag qhov precision; lub siab cov menyuam nto tau txais kev kho tshwj xeeb rau kev hnav tsis kam; thiab tag nrho cov kis tau tus mob siv lub hardened gearbox, ua kom muaj kev sib kis tau zoo thiab muaj zog ruaj khov. Nkag siab txog nws txoj haujlwm ua haujlwm tso cai rau kev ua haujlwm zoo ntawm cov khoom siv, txhim kho kev tsim khoom thiab cov khoom zoo.