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Process for separation of asbestos-containing material and prevention of floating of dust

  • US 5,052,756 A
  • Filed: 03/26/1990
  • Issued: 10/01/1991
  • Est. Priority Date: 03/04/1988
  • Status: Expired due to Fees
First Claim
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1. A process for separation of an asbestos-containing material from a surface to which the asbestos-containing material is adhered while preventing release into the atmosphere of the separated asbestos-containing material as a fine dust, utilizing an elongated holder having a central longitudinal axis, a front axial end and a rear axial end, a nozzle head mounted on said front axial end of said holder and extending frontwardly therefrom, said nozzle head having a central axis that is parallel with and laterally offset from said central longitudinal axis of said holder, means for continuously revolving said nozzle head about said central longitudinal axis of said holder, said nozzle head having a plurality of space-apart nozzles arranged in a pattern on the front face thereof so that said nozzles move through separate circular paths when said nozzle head revolves around said central longitudinal axis of said holder, said nozzles having an orifice diameter of from 0.05 to 0.5 mm, which comprises the steps of:

  • continuously and unidirectionally revolving said nozzle head around said central longitudinal axis of said holder at a rate of 800 to 4000 rpm;

    simultaneously moving said nozzle head substantially in parallel with said surface;

    simultaneously supplying water at a pressure of 80 kg/cm2 or higher at a volumetric flow rate not greater than 12 liters/min to said nozzles for thereby jetting said high pressure water from said nozzles against said surface, the loci of the streams of said high pressure water jetted from said nozzles overlapping each other as said revolving nozzle head is moved substantially in parallel with said surface; and

    disposing a polymeric water absorbent material on a floor surface facing said surface from which said asbestos-containing material is separated.

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