Drying recycled fiber rejects in a bench-scale cyclone: Influence of device geometry and operational parameters on drying mechanisms

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Drying recycled fiber rejects in a bench-scale cyclone : Influence of device geometry and operational parameters on drying mechanisms. / Grimm, Alejandro; Elustondo, Diego; Mäkelä, Mikko; Segerström, Markus; Kalén, Gunnar; Fraikin, Laurent; Léonard, Angélique; Larsson, Sylvia H.

julkaisussa: Fuel Processing Technology, Vuosikerta 167, 01.12.2017, s. 631-640.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Grimm, Alejandro ; Elustondo, Diego ; Mäkelä, Mikko ; Segerström, Markus ; Kalén, Gunnar ; Fraikin, Laurent ; Léonard, Angélique ; Larsson, Sylvia H. / Drying recycled fiber rejects in a bench-scale cyclone : Influence of device geometry and operational parameters on drying mechanisms. Julkaisussa: Fuel Processing Technology. 2017 ; Vuosikerta 167. Sivut 631-640.

Bibtex - Lataa

@article{515880493d2d4247b1d91c385f947d36,
title = "Drying recycled fiber rejects in a bench-scale cyclone: Influence of device geometry and operational parameters on drying mechanisms",
abstract = "Significant amounts of waste sludge and rejects are generated by pulp and paper mills, and stricter environmental regulations have made waste handling a global challenge. Thermochemical conversion of mechanically dewatered by-products is expensive and inefficient due to their high moisture content; therefore drying is a vital unit operation in waste management. This paper reports results from drying of light coarse fiber reject in a bench-scale cyclone that allows changes in geometry. For the sake of comparison, convective fixed-bed drying tests were also performed. The results showed that the drying rate in the cyclone was hundreds of times higher than in the fixed-bed. For cyclone drying, the inlet air velocity was the most important factor in both determining the drying rate and residence time of the material. This led to the hypothesis that grinding of the reject particles due to particle-wall and particle-particle collisions play a crucial role in enhancing the efficiency of heat and mass transfer. In addition to inlet air velocity, cyclone geometry was the main factor that determined particle residence time, as drying air temperature mainly determined drying rate.",
keywords = "Biomass waste, Convective fixed-bed drying, Cyclone drying, Forest industry, Paper mills, Paper sludge",
author = "Alejandro Grimm and Diego Elustondo and Mikko M{\"a}kel{\"a} and Markus Segerstr{\"o}m and Gunnar Kal{\'e}n and Laurent Fraikin and Ang{\'e}lique L{\'e}onard and Larsson, {Sylvia H.}",
year = "2017",
month = "12",
day = "1",
doi = "10.1016/j.fuproc.2017.08.004",
language = "English",
volume = "167",
pages = "631--640",
journal = "Fuel Processing Technology",
issn = "0378-3820",
publisher = "Elsevier Science B.V.",

}

RIS - Lataa

TY - JOUR

T1 - Drying recycled fiber rejects in a bench-scale cyclone

T2 - Influence of device geometry and operational parameters on drying mechanisms

AU - Grimm, Alejandro

AU - Elustondo, Diego

AU - Mäkelä, Mikko

AU - Segerström, Markus

AU - Kalén, Gunnar

AU - Fraikin, Laurent

AU - Léonard, Angélique

AU - Larsson, Sylvia H.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Significant amounts of waste sludge and rejects are generated by pulp and paper mills, and stricter environmental regulations have made waste handling a global challenge. Thermochemical conversion of mechanically dewatered by-products is expensive and inefficient due to their high moisture content; therefore drying is a vital unit operation in waste management. This paper reports results from drying of light coarse fiber reject in a bench-scale cyclone that allows changes in geometry. For the sake of comparison, convective fixed-bed drying tests were also performed. The results showed that the drying rate in the cyclone was hundreds of times higher than in the fixed-bed. For cyclone drying, the inlet air velocity was the most important factor in both determining the drying rate and residence time of the material. This led to the hypothesis that grinding of the reject particles due to particle-wall and particle-particle collisions play a crucial role in enhancing the efficiency of heat and mass transfer. In addition to inlet air velocity, cyclone geometry was the main factor that determined particle residence time, as drying air temperature mainly determined drying rate.

AB - Significant amounts of waste sludge and rejects are generated by pulp and paper mills, and stricter environmental regulations have made waste handling a global challenge. Thermochemical conversion of mechanically dewatered by-products is expensive and inefficient due to their high moisture content; therefore drying is a vital unit operation in waste management. This paper reports results from drying of light coarse fiber reject in a bench-scale cyclone that allows changes in geometry. For the sake of comparison, convective fixed-bed drying tests were also performed. The results showed that the drying rate in the cyclone was hundreds of times higher than in the fixed-bed. For cyclone drying, the inlet air velocity was the most important factor in both determining the drying rate and residence time of the material. This led to the hypothesis that grinding of the reject particles due to particle-wall and particle-particle collisions play a crucial role in enhancing the efficiency of heat and mass transfer. In addition to inlet air velocity, cyclone geometry was the main factor that determined particle residence time, as drying air temperature mainly determined drying rate.

KW - Biomass waste

KW - Convective fixed-bed drying

KW - Cyclone drying

KW - Forest industry

KW - Paper mills

KW - Paper sludge

UR - http://www.scopus.com/inward/record.url?scp=85027333505&partnerID=8YFLogxK

U2 - 10.1016/j.fuproc.2017.08.004

DO - 10.1016/j.fuproc.2017.08.004

M3 - Article

VL - 167

SP - 631

EP - 640

JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

ER -

ID: 30174222