Yuav daws qhov txhaum li cas hauv Wood Chip Roj Pellet Tshuab?

Dec 24, 2025

Thawj kauj ruam yog los xyuas cov khoom siv raw, vim qhov no yog qhov feem ntau ua rau tsis zoo pellet tsim thiab kuj yog qhov yooj yim los daws. Thawj qhov yuav tsum tau kuaj xyuas yog cov dej noo ntawm cov khoom siv raw. Qhov zoo tshaj noo noo cov ntsiab lus rau ntoo chip roj pellets yog 12% -15%. Yog hais tias cov pellets yog xoob thiab crumble yooj yim, cov ntsiab lus noo noo yuav tsawg dhau (hauv qab 10%), ua rau tsis txaus adhesiveness. Yog tias cov pellets muaj cov kab nrib pleb ntawm qhov chaw thiab ua rau tawg, cov ntsiab lus noo noo yuav siab dhau (ntau tshaj 18%), ua rau cov dej noo hauv cov khoom siv raw evaporate thiab tawg cov pellets thaum nias. Txoj kev daws teeb meem yog yooj yim: kom tsis muaj dej noo, tshuaj tsuag qee qhov dej sib npaug rau hauv cov khoom siv raw, do zoo, thiab cia nws sawv ntsug li 30 feeb ua ntej ua haujlwm; rau cov ntsiab lus siab noo noo, ncua lub sij hawm ziab kom txo cov dej noo mus rau tus qauv ntau. Piv txwv li, ib tus neeg siv tau tshaj tawm pellet tsim tus nqi tsuas yog 65%. Tom qab kuaj xyuas, nws tau pom tias cov ntoo nti cov dej noo yog 22%. Tom qab ziab rau 2 teev, cov dej noo noo poob mus rau 14%, thiab qhov tsim tau nce mus rau 93%.

Yog tias cov khoom siv raw zoo, kho qhov tsis zoo ntawm biofuel sawdust pellet tshuab. Kev tsim cov pellet tsis zoo yuav yog vim tsis txaus siab los yog qhov kub tsis zoo. Feem ntau, lub siab xav tau rau ntoo nti nias yog 10-15 MPa, thiab qhov kub yog 80-90 degree. Tsis txaus siab yuav ua rau tsis tiav compression ntawm raw khoom, ua rau xoob hais. Tsis tshua muaj kub yuav tiv thaiv lignin nyob rau hauv cov ntaub ntawv raw los ntawm softening thiab tsim ib tug binder, kuj muaj feem xyuam rau cov txheej txheem molding. Kev kho yuav tsum tau maj mam, ua kom lub siab ntawm 0.5 MPa thiab qhov kub ntawm 5℃txhua zaus. Saib xyuas rau 10 feeb tom qab txhua qhov kev hloov kho los kuaj xyuas cov khoom tsim ua ntej txiav txim siab seb puas yuav kho ntxiv. Piv txwv li, hardwood chips yog ib qho nyuaj, yog li kho lub siab mus rau 13-15 MPa thiab qhov kub ntawm ib ncig ntawm 90 degree; softwood chips yog ntau nplaum, yog li lub siab ntawm 10-12 MPa thiab kub ntawm 80℃yog txaus.

Yog tias thawj ob qhov zoo, xyuas cov khoom tseem ceeb ntawm lub tsev me siv biomass ntoo pellet zeb- lub siab rollers thiab tuag. Kev hnav hnyav lossis grooves rau ntawm qhov chaw ntawm lub siab rollers, los yog txhaws lossis loj qhov tuag, yuav ua rau muaj qhov tsis zoo. Ua ntej, nres lub tshuab thiab disconnect lub hwj chim. Ntxuav cov khoom seem ntawm cov pwm thiab siv cov cuab yeej tshwj xeeb kom tshem tawm cov qhov thaiv pwm. Tom ntej no, xyuas qhov chaw ntawm lub siab roller. Yog tias hnav tsis sib xws, xuab zeb nws du. Yog tias qhov hnav hnyav dhau lawm (nto hnav dua 2 hli), hloov lub siab rau cov menyuam ncaj qha. Tsis tas li ntawd, xyuas qhov sib txawv ntawm lub siab cov menyuam thiab cov pwm. Qhov sib txawv li qub yog 0.1-0.3mm. Yog tias qhov sib txawv loj dhau lawm, cov khoom siv raw tsis tuaj yeem raug compressed tag nrho. Kho cov bolts kho kom haum qhov sib txawv. Qee cov neeg siv tau ntsib qhov txo qis ntawm cov pellet ua tus nqi vim qhov txhaws pwm qhov uas tsis tau ntxuav hauv lub sijhawm. Tom qab ntxuav cov pwm qhov, cov nyhuv tsim tam sim ntawd rov qab mus rau qhov qub.

Lwm qhov yooj yim overlooked point yog particle loj ntawm raw khoom. Yog hais tias cov sawdust hais loj dhau (tshaj 5 hli) lossis qhov loj me me, nws tseem yuav cuam tshuam rau kev tsim. Qhov kev daws teeb meem yog txhawm rau txhawm rau cov khoom siv raw dua thiab siv cov khoom sib cais los ua kom cov khoom siv raw ntawm 2-5 hli ua ntej ua. Hauv cov ntsiab lus, qhov kev txiav txim rau kev daws cov teeb meem tsis zoo yog: thawj zaug xyuas cov dej noo ntawm cov khoom siv raw → tom qab ntawd kho cov khoom siv tsis zoo → thaum kawg xyuas lub siab rau cov menyuam thiab pwm. Ua raws li qhov kev txiav txim no tuaj yeem daws ntau dua 80% ntawm kev tsim teeb meem.