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US 5,401,204 AGranted
Blast nozzle containing water atomizer for dust control
AssigneeChurch & Dwight Co., Inc.
InventorJames D. Shank
Life of this patent
Estimating the term…
Abstract
A blast nozzle for directing a stream of abrasive particles against a surface to remove surface contaminants therefrom further includes an externally attached atomized water nozzle which directs a stream of atomized water particles to the surface to suppress dust formation.
Claims12
A process for removing contaminants from the surface of a solid substrate comprising;
- directing at said substrate a stream of abrasive friable sodium bicarbonate particles capable of stripping said contaminants from said surface upon contact therewith, said sodium bicarbonate particles being directed at said substrate by means of a blast nozzle comprising a hollow converging inlet portion, a downstream hollow diverging outlet portion and a venturi orifice placed intermediate of said converging and diverging portions wherein the total length of said blast nozzle is at least four times the length of said hollow converging inlet portion, forming a separate stream of atomized water droplets by atomizing water with compressed air and directing said separate stream of atomized water droplets to said solid surface to suppress dust formation as said abrasive friable sodium bicarbonate particles contact said solid surface.
Dependencies are inferred from the claim text.