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Methods and apparatus for moving and separating materials exhibiting different physical properties

  • US 4,759,775 A
  • Filed: 02/21/1986
  • Issued: 07/26/1988
  • Est. Priority Date: 02/21/1986
  • Status: Expired due to Term
First Claim
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1. A method for separating undissolved gases from a liquid, the method comprising the steps of:

  • moving the undissolved gases and the liquid in a continuous flow through a separation vessel;

    generating by a transducer an incident acoustic wave which propagates through the separation vessel;

    impinging the incident acoustic wave on a reflective surface to form a reflected acoustic wave which propagates through the separation vessel;

    superimposing the incident and reflected acoustic waves to form a resultant wave comprising maximum and minimum pressure surfaces;

    moving the reflective surface and changing the frequency of the incident acoustic wave such that the number of wavelengths of the incident acoustic wave between the transducer and the reflective surface remains substantially constant and the acoustic impedance seen by the transducer remains substantially the same whereby the undissolved gases are moved towards a location in the separation vessel; and

    separating the undissolved gases from the liquid.

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