Title: Method and apparatus for measuring the concentration of solid particles suspended in a gas phase

Abstract: A method and apparatus for measuring the concentration of solid particles in a gaseous phase which consists in passing a solid particles laden gas through at least one fluidized bed of balls having a diameter greater than that of the largest particles of said gas in order that said balls are not carried away by the ascending air stream. During their passage through the fluidized bed, these particles collide with the balls of the fluidized bed giving rise to a triboelectrification phenomenon and the electric current collected by the metallic walls of the container in which the fluidized bed is provided, is measured by a suitable electric or electronic control system upon separation of particles from the balls.

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Inventors: Guichard, Jean-Claude (Ris-Orangis, FR)
Chauvelier, Claude (Ballancourt, FR)

Application Number: 445927
Filing Date: 1974-02-26
Publication_date: 1976-02-24
Assignee: Institut National de Recherche Chimique Appliquee (Paris, FR)
Primary Class(es): 73/23.33 73/28.01, 95/58, 96/17
Other Classes:
US Patent Ref:

2924294	Feb, 1960	Johnstone	55/103.
2994035	Jul, 1961	Feifel	73/28.
3114877	Dec, 1963	Dunham	73/28.
3679973	Jul, 1972	Smith et al.	73/28.
3680287	Aug, 1972	Wood et al.	55/103.

Other Refs:
Primary Examiner: Gill, James J.
Assistant Examiner: Ciarlante, Anthony V.
Attorney: Flocks; Karl W.