Puas yog Shredding Infected Ntoo Txo Nws Tus Nqi Calorific Rau Biomass Roj?

Kev siv woody biomass rau cua sov thiab lub zog tsim hluav taws xob yog lub hauv paus ntawm kev hloov pauv mus rau lub zog tauj dua tshiab.Txawm li cas los xij, ib feem tseem ceeb ntawm cov khoom noj muaj nyob -tshwj xeeb yog los ntawm cua daj cua dub- cov ntoo puas, cov kab mob, lossis cov hav zoov tswj hwm- kis tau los ntawm cov kab mob fungi, kab mob, los yog kab kab, uas yog ib qho ntawm cov khoom siv ua ntej. Qhov loj me me kom yooj yim tuav thiab combustion.Qhov no ua rau cov lus nug tseem ceeb rau cov neeg ua haujlwm biomass: Puas yog qhov kev txiav txim ntawm cov ntoo muaj kab mob ntxiv degrade nws cov nqi calorific?
Cov lus teb ncaj qha yog tsis yog -shredding nws tus kheej tsis tshuaj hloov ntoo lossis txo nws cov ntsiab lus ntawm lub zog.Txawm li cas los xij, kev kis kab mob feem ntau degrades ntoo ua ntej shredding, thiab cov txheej txheem shredding tuaj yeem cuam tshuam ncaj qha rau qhov ua tau zoo npaum li cas qis dua -cov roj zoo ua tau zoo.Cov kab lus no tshawb fawb txog kev tshawb fawb tom qab ntoo lwj, cov nyhuv ntawm biomass ntawm shredding.
1.Tus Neeg Ua Phem Txhaum Cai: Kev Ua Txhaum Cai Txhaum Cai, Tsis Siv Neeg Siv Hluav Taws Xob
Yuav kom nkag siab txog tus nqi calorific, peb yuav tsum xub saib seb qhov kub li cas.Lub zog hauv ntoo feem ntau yog los ntawm lignin thiab cellulose.Thaum ntoo raug mob-feem ntau los ntawm rot- ua rau cov fungi xws li Heterobasidion (root rot) los yog Ganoderma (xim av rot) -cov khoom noj khoom haus no secrets.
•Brown Rot: Cov fungi decompose cellulose thaum tawm hauv lignin loj heev lawm.Lub ntoo yuav nkig thiab tsaus nti tab sis khaws ib co structural kev ncaj ncees.
•White Rot: Fungi ua rau ob qho tib si lignin thiab cellulose, tig ntoo mus rau hauv ib txoj hlua, daj ntseg.
• Mos Rot: Feem ntau nyob rau hauv cov huab cua ntub heev, qhov no tawm tsam cellulose nyob rau hauv cov phab ntsa thib ob ntawm tes.
Nyob rau hauv txhua rooj plaub, cov microbial metabolism hloov cov khoom sib txuas ntawm cov pa roj carbon monoxide rau hauv CO₂, dej, thiab fungal biomass.Qhov kev puas tsuaj ntawm cov roj ntsha no yog qhov txo cov nqi calorific.A txoj kev tshawb fawb luam tawm nyob rau hauv Forest Products Journal pom tias cov ntoo lwj hnyav tuaj yeem poob ntawm 15% mus rau 50% ntawm nws qhov qub qhuav- nyhav zog txhua yam thiab nyob ntawm seb cov khoom puas.
Shredding yog cov txheej txheem ua haujlwm nkaus xwb.Nws rhuav tshem cov khoom loj rau hauv cov me me los ntawm kev sib tsoo thiab cuam tshuam.Nws tsis hlawv cov pa roj carbon lossis evaporate volatile tebchaw; yog li ntawd, nws tsis ncaj qha txo qis tag nrho Calorific nqi (GCV) ib kilogram ntawm qhuav teeb meem.Yog hais tias koj muaj 1 kg ntawm qhuav, kab mob ntoo chips, lawv muaj ib tug loj npaum li cas ntawm shred lub zog.
2.Indirect Effects: Yuav ua li cas Shredding Interacts nrog Kab Mob Ntoo
Thaum shredding tsis hloov cov chemistry, nws hloov pauv lub cev lub cev ntawm cov khoom muaj kab mob, uas cuam tshuam rau lub zog rov qab zoo thaum lub sij hawm combustion.
A.Increased Moisture Content
Cov ntoo muaj kab mob feem ntau muaj peev xwm khaws tau dej ntau dua vim qhov tawg ntawm cov phab ntsa ntawm tes.Shredding ua rau lub ntsej muag nce ntxiv - cheeb tsam - mus rau - ntim ratio.Thaum qhov no yuav pab kom qhuav yog tias cov roj khaws cia kom zoo, nws kuj txhais tau tias cov khoom tuaj yeem rov nqus cov huab cua noo noo sai dua li cov khoom siv hluav taws xob yog qhov tseem ceeb ntawm cov khoom siv hluav taws xob.High. boiling dej es tsis txhob cua sov koj lub tsev los yog generating chav.
B.Accelerated Degradation
Shredding nthuav tawm qhov chaw tshiab rau cov pa oxygen thiab microbial kev ua si.Yog tias cov ntoo muaj kab mob yog shredded thiab tom qab ntawd tso rau hauv ib pawg rau ntau lub lis piam lossis ntau lub hlis, cov kab mob aerobic thiab fungi tuaj yeem ua kom cov txheej txheem decomposition uas pib hauv hav zoov.This "post-shredding" lwj tuaj yeem ua rau qhov ntsuas tau poob ntawm calorific lub sijhawm.
C.Ash Cov ntsiab lus thiab Slagging
Kev loj hlob ntawm fungal pab txhawb rau cov ntxhia tshauv cov ntsiab lus ntawm cov ntoo.Thaum cov ntoo muaj kab mob yog shredded, av thiab grit khaws thaum lub sij hawm sau qoob loo ntau zoo sib xyaw rau hauv cov khoom zoo. Cov hmoov tshauv ntau dua txo cov nqi calorific (NCV) vim tias cov zaub mov tsis hlawv. Tsis tas li ntawd, qee cov fungi tuaj yeem mloog zoo alkali hlau (xws li cov poov tshuaj, hengging, thiab lwm yam). fouling nyob rau hauv boilers-txo ua hauj lwm efficiency txawm tias cov roj theoretical BTU cov ntsiab lus tseem tsis hloov.
3.Cov txiaj ntsig ntawm Shredding rau combustion Efficiency
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias txawm tias muaj teeb meem cuam tshuam nrog ua ntej - kis kab mob, shredding feem ntau muaj txiaj ntsig zoo rau kev siv qis - qib ntoo:
1.Improved Combustion Kinetics: Cov khoom me me ignite sai dua thiab hlawv ntau dua tag nrho.Qhov no tuaj yeem pab cuam tshuam lub zog qis ntawm cov ntoo lwj los ntawm kev ua kom cov pa roj carbon tsawg dua tawm ntawm lub tshuab hluav taws xob.
2. Homogeneity: shredding sib tov rotten thiab suab ntoo ua ke, tsim ib tug zoo ib yam ntawm cov roj qib dua manually sorting cav.
3.Logistics: densifying shredded khoom rau hauv pellets los yog briquettes yeej tiv thaiv nws los ntawm ntxiv noo noo uptake thiab lom lom thaum lub sij hawm cia.
4. Cov lus pom zoo rau cov neeg tsim khoom siv biomass
Yog tias koj tab tom ua cov ntoo muaj kab mob rau biomass roj, xav txog cov kev coj ua zoo tshaj plaws hauv qab no:
• Ntsuas qhov hnyav: Pom pom cov ntoo. Ntoo uas yog "punky" (crumbles yooj yim nyob rau hauv cov ntiv tes siab) muaj feem yuav poob ntau dhau los ua haujlwm tau. Ntoo uas tsuas yog tsis muaj xim tab sis tseem muaj lub suab zoo khaws feem ntau ntawm nws lub zog.
• Qhuav tam sim ntawd: shred tsuas yog thaum koj muaj ib lub tswv yim kom qhuav cov khoom sai sai (siv pov tseg tshav kub los ntawm cov nroj tsuag). Tsis txhob cia shredded ntoo kab mob zaum nyob rau hauv los nag.
•Moitor Moisture: Ua kom cov dej noo qis dua 20-25%.
•Blend Feedstocks: Sib tov shredded kab mob ntoo nrog siab - zoo sawdust los yog chips huv si kom sib npaug cov roj sib tov thiab tiv thaiv cov teeb meem boiler.
Shredding muaj kab mob ntoo tsis, nyob rau hauv nws tus kheej, txo nws cov nqi calorific.Lub zog poob tshwm sim thaum lub sij hawm cov kab mob kab mob ua ntej sau. Txawm li cas los, shredding ua raws li ib tug catalyst rau degradation ntxiv yog hais tias cov ntaub ntawv tsis raug kho kom raug post-processing.Los ntawm qhov chaw saum npoo, shredding ua rau cov ntoo muaj kab mob ntau dua rau cov dej ntws tawm sai dua, ua kom cov cua sov tuaj yeem ua rau qis dua.
Rau cov neeg tsim khoom siv roj biomass, qhov tseem ceeb yog saib cov shredding tsis yog ua rau lub zog poob, tab sis raws li ib kauj ruam yuav tsum tau ceev faj lub sij hawm.Los ntawm shredding ntoo muaj kab mob ua ntej ziab thiab combustion, cov neeg ua hauj lwm muaj peev xwm ua kom muaj peev xwm ua kom muaj txiaj ntsig zoo ntawm cov khoom me me thaum txo qhov cuam tshuam tsis zoo ntawm cov ntoo cuam tshuam txog kev lom neeg.