Dewatering saturated, networked suspensions with a screw press

Tom S. Eaves; Daniel T. Paterson; Duncan R. Hewitt; Neil J. Balmforth; D. Mark Martinez

doi:10.1007/s10665-019-10029-3

Dewatering saturated, networked suspensions with a screw press

Tom S. Eaves (Lead / Corresponding author)
, Daniel T. Paterson
, Duncan R. Hewitt
, Neil J. Balmforth
, D. Mark Martinez

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

303 Downloads (Pure)

Abstract

A model is presented for the dewatering of a saturated two-phase medium in a screw press. The model accounts for the detailed two-phase rheological behaviour of the pressed material and splits the press into two zones, an initial well-mixed constant-pressure region followed by an axial transport region in which the total pressure steadily increases. In this latter region, a slowly varying helical coordinate transformation is introduced to help reduce the dynamics to an annular bi-axial compression of the two-phase medium. Unlike previous modelling, the transition point between the two zones is determined self-consistently, rather than set a priori, and the pressure along the length of the press is deduced from the rheology of the two-phase flow rather than averaging the two-phase dynamics over a cross section of the press. The model is compared to experimental observations of the dewatering of a paper-making fibre suspension and of a clay slurry, and is shown to reproduce operational data.

Original language	English
Pages (from-to)	1-28
Number of pages	28
Journal	Journal of Engineering Mathematics
Volume	120
Issue number	1
Early online date	12 Dec 2019
DOIs	https://doi.org/10.1007/s10665-019-10029-3
Publication status	Published - 1 Feb 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure
SDG 12 Responsible Consumption and Production

Keywords

Clay
Consolidation
Dewatering
Pulp
Screw press
Two-phase flow

ASJC Scopus subject areas

General Mathematics
General Engineering

Access to Document

10.1007/s10665-019-10029-3

Author Accepted Manuscript
This is a post-peer-review, pre-copyedit version of an article published in Journal of Engineering Mathematics. The final authenticated version is available online at: https://doi.org/10.1007/s10665-019-10029-3.
Accepted author manuscript, 1.49 MB

Cite this

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title = "Dewatering saturated, networked suspensions with a screw press",

abstract = "A model is presented for the dewatering of a saturated two-phase medium in a screw press. The model accounts for the detailed two-phase rheological behaviour of the pressed material and splits the press into two zones, an initial well-mixed constant-pressure region followed by an axial transport region in which the total pressure steadily increases. In this latter region, a slowly varying helical coordinate transformation is introduced to help reduce the dynamics to an annular bi-axial compression of the two-phase medium. Unlike previous modelling, the transition point between the two zones is determined self-consistently, rather than set a priori, and the pressure along the length of the press is deduced from the rheology of the two-phase flow rather than averaging the two-phase dynamics over a cross section of the press. The model is compared to experimental observations of the dewatering of a paper-making fibre suspension and of a clay slurry, and is shown to reproduce operational data.",

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author = "Eaves, \{Tom S.\} and Paterson, \{Daniel T.\} and Hewitt, \{Duncan R.\} and Balmforth, \{Neil J.\} and Martinez, \{D. Mark\}",

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T1 - Dewatering saturated, networked suspensions with a screw press

AU - Eaves, Tom S.

AU - Paterson, Daniel T.

AU - Hewitt, Duncan R.

AU - Balmforth, Neil J.

AU - Martinez, D. Mark

PY - 2020/2/1

Y1 - 2020/2/1

N2 - A model is presented for the dewatering of a saturated two-phase medium in a screw press. The model accounts for the detailed two-phase rheological behaviour of the pressed material and splits the press into two zones, an initial well-mixed constant-pressure region followed by an axial transport region in which the total pressure steadily increases. In this latter region, a slowly varying helical coordinate transformation is introduced to help reduce the dynamics to an annular bi-axial compression of the two-phase medium. Unlike previous modelling, the transition point between the two zones is determined self-consistently, rather than set a priori, and the pressure along the length of the press is deduced from the rheology of the two-phase flow rather than averaging the two-phase dynamics over a cross section of the press. The model is compared to experimental observations of the dewatering of a paper-making fibre suspension and of a clay slurry, and is shown to reproduce operational data.

AB - A model is presented for the dewatering of a saturated two-phase medium in a screw press. The model accounts for the detailed two-phase rheological behaviour of the pressed material and splits the press into two zones, an initial well-mixed constant-pressure region followed by an axial transport region in which the total pressure steadily increases. In this latter region, a slowly varying helical coordinate transformation is introduced to help reduce the dynamics to an annular bi-axial compression of the two-phase medium. Unlike previous modelling, the transition point between the two zones is determined self-consistently, rather than set a priori, and the pressure along the length of the press is deduced from the rheology of the two-phase flow rather than averaging the two-phase dynamics over a cross section of the press. The model is compared to experimental observations of the dewatering of a paper-making fibre suspension and of a clay slurry, and is shown to reproduce operational data.

KW - Clay

KW - Consolidation

KW - Dewatering

KW - Pulp

KW - Screw press

KW - Two-phase flow

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DO - 10.1007/s10665-019-10029-3

M3 - Article

SN - 0022-0833

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SP - 1

EP - 28

JO - Journal of Engineering Mathematics

JF - Journal of Engineering Mathematics

IS - 1

ER -

Dewatering saturated, networked suspensions with a screw press

Abstract

UN SDGs

Keywords

ASJC Scopus subject areas

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Inivted Speaker, University of Bristol Mathematics, Fluids and Materials

Eaves, Tom

Cite this

Dewatering saturated, networked suspensions with a screw press

Abstract

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Activities

Inivted Speaker, University of Bristol Mathematics, Fluids and Materials

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Eaves, Tom

Cite this