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Title: Methods And Apparatus For Acoustic Fiber Fractionation

Abstract

Methods and apparatus for acoustic fiber fractionation using a plane ultrasonic wave field interacting with water suspended fibers circulating in a channel flow using acoustic radiation forces to separate fibers into two or more fractions based on fiber radius, with applications of the separation concept in the pulp and paper industry. The continuous process relies on the use of a wall-mounted, rectangular cross-section piezoelectric ceramic transducer to selectively deflect flowing fibers as they penetrate the ultrasonic field. The described embodiment uses a transducer frequency of approximately 150 kHz. Depending upon the amount of dissolved gas in water, separation is obtained using a standing or a traveling wave field.

Inventors:
 [1]
  1. Smyrna, GA
Issue Date:
Research Org.:
INST OF PAPER SCIENCE & TECH
OSTI Identifier:
879552
Patent Number(s):
5979664
Application Number:
09/137356
Assignee:
Institute of Paper Science and Technology, Inc. (Atlanta, GA)
DOE Contract Number:  
FC07-97ID13578
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Brodeur, Pierre. Methods And Apparatus For Acoustic Fiber Fractionation. United States: N. p., 1999. Web.
Brodeur, Pierre. Methods And Apparatus For Acoustic Fiber Fractionation. United States.
Brodeur, Pierre. Tue . "Methods And Apparatus For Acoustic Fiber Fractionation". United States. https://www.osti.gov/servlets/purl/879552.
@article{osti_879552,
title = {Methods And Apparatus For Acoustic Fiber Fractionation},
author = {Brodeur, Pierre},
abstractNote = {Methods and apparatus for acoustic fiber fractionation using a plane ultrasonic wave field interacting with water suspended fibers circulating in a channel flow using acoustic radiation forces to separate fibers into two or more fractions based on fiber radius, with applications of the separation concept in the pulp and paper industry. The continuous process relies on the use of a wall-mounted, rectangular cross-section piezoelectric ceramic transducer to selectively deflect flowing fibers as they penetrate the ultrasonic field. The described embodiment uses a transducer frequency of approximately 150 kHz. Depending upon the amount of dissolved gas in water, separation is obtained using a standing or a traveling wave field.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {11}
}

Patent:

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