Post on 03-Apr-2018
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Applications of Electron Processing in thePulping IndustryEconomics
Canadian TMP Pulp MiII- newsprint from black spruceSpecific Energy - 2200 kW.h/tonElectrical Cost - US$ 0.03 per kW.h
Pulp Energy Cost - US $66/ton, $18.5M/yr.- higher for southern pine
I 250/0 Reduction >_US $4.5M Savings IEuropean Energy Costs 23X Higher
Energy Savings 23X Higher
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Effects of Electron Processingon TMP and CTMP Pulp Quality
SummaryI 20% lower energy absorptionIncreased shives contentReduced long fibre contentShorter average fibre lengthSame density
Lower t e n s ~ l e a n d ~ ~ n M i J 1 ~ \ C r SLower tear IndexlT P P ySame scattering coefficientSame pulp yield
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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MAXIMUM THROUGHPUT
30 kGy50kW
86 tonnes/day31,000 t/a
30 kGy250 kW
432 tonnes/day155,000 t/a
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Viscose Process
CelluloseWood Pulp
- - - - ~CS2, NaOH
Viscose- - - - - - - - AEeL
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Viscose Products
Textiles'Clothing
~ Teabags
IFilms
Sanitary WearSausageCasings Belts, Hoses
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Viscose (Rayon) Industry Pollution Problems High Chemical Costs High Energy Costs Processing Problems
Multibillion $ GlobalIndustry Steady Growth
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Conventional Viscose Process
Wood Pulp Alkalization Ageing
FilamentStaple-FibreCordCasing
Xanthation
stretching/finishingSpinning
VISCOSE / ; ~ 6 ; \ .
tRipeningpollutiono 0 0~ffluent
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Cellulose Structure
CelluloseChains
End View(CRYSTALLIN
..
Sac::::>ocgc::::> c::::>
~AMORPHOUS
Crystalline Structure ofCellulose Extensive Hydrogen Bonding Network Difficult to Penetrate by Reagents High Concentrations ofCaustic and CSzNeeded
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Electron ProcessingEffects on Cellulose Supramolecular Structure
To View End View
Cleavagesites
, CRYSTALLINE ,~ ~ C > c : : > 5: :-;;:-C t: c : :>cgc:::9>CD
tAMORPHOUS Electrons penetrate amorphous and crystalline regions Treatment produces chain cleavage -can replace aging step Treatment destabilizes crystal structure- enhances accessibility- allows use of less CS2 and alkali
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Filament,StapleFibre,Cord, orCasing
Alkalization
stretching/finishingSpinning
Wood Pulp Ageing18-24%CS,tL 5-7%' \ . CS2VISCOSE _ NaOH ~ 3
tDissolution Xant ation
much less pollutiono 0 0~
Viscose Process Using Electron Treated PulllIelectron treated II I
lesseffluent
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Benefits ofElectron Processingin the Viscose ProcessReduced Chemical Demand
Carbon Disulfide, Alkali, Acid, Zinc- Several Million $ US in SavingsEnvironmentalReduced Emissions I Efflents- CS2, H2S, Zinc
Improved Process Control
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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1+1 ~i iI i i i iCanadaIIIUSA11MexicoI-IBrazilc:::ISwitzerland
UK Norway Sweden Finland--ustria-ermany
Z ::c South Africa India Japan Taiwan
Over 25 Companies
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Plant-Scale Trials1995: > 100 Tonnes, Complete Success
ElectronTreatmentI of Pulp
1997: Marketing Trial
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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SUMMARYThe Biomass Groufl
- Assisting over 25 Clients to Assess EPTin Viscose Process.
- ING A. Maurer S. A. Marketing Agreement- Operating Parameters Optimized For 34 More Shortly- 2 Plant-Scale Trials Conducted
1997-99: 4 more- Spinning Parameters - Zinc Optimization~ - - - - - AECL
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Viscose Products
TextilesClothing
~ Teabags
Belts, HosesI
Films
Sanitary WearSausage Casings
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Cellulose Structure
CelluloseChains
End View( C R Y S T A L L I N ~
Sac:>c:>cgc:>o
tAMORPHOUS
Crystalline Structure ofCellulose Extensive Hydrogen Bonding Network Difficult to Penetrate by Reagents High Concentrations of alkali and CS 2 Needed
7/28/2019 Aplicaciones de procesado electrnico a la industria de la pulpa.pdf
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Benefits ofElectron Processingin the Viscose Process
Reduced Chemical DemandCarbon Disulfide, Alkali, Acid, Zinc- Several Million $ US in SavingsEnvironmentalReduced Emissions I Effluents- CS2, H2S, Zinc
Improved Process Control