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System for aerating and fluidizing particulate material

  • US 3,981,417 A
  • Filed: 02/11/1974
  • Issued: 09/21/1976
  • Est. Priority Date: 09/20/1972
  • Status: Expired due to Term
First Claim
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1. A particulate material aeration and fluidization system comprising:

  • an upper aeration and fluidization chamber including a substantially horizontally disposed circular plate having inner and outer concentric circular regions with a plurality of apertures formed through the plates in the outer region;

    a first thin, elongate agitation member mounted for rotation around a path extending substantially across the outer region of apertures and some predetermined distance above the plate of the first aeration and fluidization chamber to aerate and agitate particulate material in the chamber and to cause particulate material to flow from the chamber through the apertures in the plate;

    a stationary upper conical member tapering downwardly and outwardly under a number of the apertures in the outer region whereby particulate material flowing through the apertures of said plate is diverted by said outer conical member;

    a lower aeration and fluidization chamber including a lower conical member surrounding the outer region of apertures formed through said plate with its upper end adjacent the lower end of the upper conical member to define an annular passageway therebetween and tapering downwardly and inwardly to a particulate material outlet, whereby the volume of particulate material flowing through the apertures of said plate is directed downwardly and inwardly to said outlet; and

    a second thin, elongate agitation member supported for rotation around a path extending adjacent to and spaced from said lower conical member of said lower aeration and fluidization chamber to aerate and agitate particulate material by loosening said material adjacent to the inner wall of the second chamber and to feed particulate material through the outlet.

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