Analysis and estimation/prediction of the disk stack centrifuge separation performance–Scaling from benchtop fixed rotor type to disk stack centrifuges

Mengyan Yang, Xiaolin Liu, John A. Howell, Hui Cheng

Research output: Contribution to journalArticle

Abstract

A mathematical model is proposed to calculate the total separation effectiveness in terms of GT for a disk stack centrifuge taking account of the variation of the centrifugal force with a position in the disk. In practice, the centrifuge ability/force is often referred as Relative Centrifugal Force (RCF) or G number, which is a multiple of the centrifugal acceleration over the gravitational acceleration. As the radial velocity varies it is important to integrate the relative centrifuge force, here in terms of the G number along the path taking account of the change in velocity. The separation effectiveness, GT is defined as an integrated product of local G number, G(x) and local residential time (dt), where dt is the time taken for the bulk fluid to traverse a distance from r to r+ dr. The GT value calculated for a disk type centrifuge can be compared with the GT value of others and compared with a bench top fixed rotor centrifuge. An industrial centrifuge would be expected to be able to deliver similar separation performance to a pilot or a lab scale one, if operated at the same/similar value of GT. This would allow the performance of a full-scale clarifier to be predicted. This model is, in essence, a simple alternative to the Sigma concept.

Original languageEnglish
JournalSeparation Science and Technology (Philadelphia)
Early online date1 Jul 2019
DOIs
Publication statusE-pub ahead of print - 1 Jul 2019

Keywords

  • Centrifuge
  • separation scaling

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Filtration and Separation

Cite this

@article{3b27bf480d1b4cc185a2f59144b212c8,
title = "Analysis and estimation/prediction of the disk stack centrifuge separation performance–Scaling from benchtop fixed rotor type to disk stack centrifuges",
abstract = "A mathematical model is proposed to calculate the total separation effectiveness in terms of GT for a disk stack centrifuge taking account of the variation of the centrifugal force with a position in the disk. In practice, the centrifuge ability/force is often referred as Relative Centrifugal Force (RCF) or G number, which is a multiple of the centrifugal acceleration over the gravitational acceleration. As the radial velocity varies it is important to integrate the relative centrifuge force, here in terms of the G number along the path taking account of the change in velocity. The separation effectiveness, GT is defined as an integrated product of local G number, G(x) and local residential time (dt), where dt is the time taken for the bulk fluid to traverse a distance from r to r+ dr. The GT value calculated for a disk type centrifuge can be compared with the GT value of others and compared with a bench top fixed rotor centrifuge. An industrial centrifuge would be expected to be able to deliver similar separation performance to a pilot or a lab scale one, if operated at the same/similar value of GT. This would allow the performance of a full-scale clarifier to be predicted. This model is, in essence, a simple alternative to the Sigma concept.",
keywords = "Centrifuge, separation scaling",
author = "Mengyan Yang and Xiaolin Liu and Howell, {John A.} and Hui Cheng",
year = "2019",
month = "7",
day = "1",
doi = "10.1080/01496395.2019.1636820",
language = "English",
journal = "Separation Science and Technology",
issn = "0149-6395",
publisher = "Taylor and Francis",

}

TY - JOUR

T1 - Analysis and estimation/prediction of the disk stack centrifuge separation performance–Scaling from benchtop fixed rotor type to disk stack centrifuges

AU - Yang, Mengyan

AU - Liu, Xiaolin

AU - Howell, John A.

AU - Cheng, Hui

PY - 2019/7/1

Y1 - 2019/7/1

N2 - A mathematical model is proposed to calculate the total separation effectiveness in terms of GT for a disk stack centrifuge taking account of the variation of the centrifugal force with a position in the disk. In practice, the centrifuge ability/force is often referred as Relative Centrifugal Force (RCF) or G number, which is a multiple of the centrifugal acceleration over the gravitational acceleration. As the radial velocity varies it is important to integrate the relative centrifuge force, here in terms of the G number along the path taking account of the change in velocity. The separation effectiveness, GT is defined as an integrated product of local G number, G(x) and local residential time (dt), where dt is the time taken for the bulk fluid to traverse a distance from r to r+ dr. The GT value calculated for a disk type centrifuge can be compared with the GT value of others and compared with a bench top fixed rotor centrifuge. An industrial centrifuge would be expected to be able to deliver similar separation performance to a pilot or a lab scale one, if operated at the same/similar value of GT. This would allow the performance of a full-scale clarifier to be predicted. This model is, in essence, a simple alternative to the Sigma concept.

AB - A mathematical model is proposed to calculate the total separation effectiveness in terms of GT for a disk stack centrifuge taking account of the variation of the centrifugal force with a position in the disk. In practice, the centrifuge ability/force is often referred as Relative Centrifugal Force (RCF) or G number, which is a multiple of the centrifugal acceleration over the gravitational acceleration. As the radial velocity varies it is important to integrate the relative centrifuge force, here in terms of the G number along the path taking account of the change in velocity. The separation effectiveness, GT is defined as an integrated product of local G number, G(x) and local residential time (dt), where dt is the time taken for the bulk fluid to traverse a distance from r to r+ dr. The GT value calculated for a disk type centrifuge can be compared with the GT value of others and compared with a bench top fixed rotor centrifuge. An industrial centrifuge would be expected to be able to deliver similar separation performance to a pilot or a lab scale one, if operated at the same/similar value of GT. This would allow the performance of a full-scale clarifier to be predicted. This model is, in essence, a simple alternative to the Sigma concept.

KW - Centrifuge

KW - separation scaling

UR - http://www.scopus.com/inward/record.url?scp=85068510154&partnerID=8YFLogxK

U2 - 10.1080/01496395.2019.1636820

DO - 10.1080/01496395.2019.1636820

M3 - Article

JO - Separation Science and Technology

JF - Separation Science and Technology

SN - 0149-6395

ER -