CLEANING METHOD AND APPARATUS UTILIZING SODIUM BICARBONATE PARTICLES

摘要

A method and apparatus (1) for effecting the continuous reliable supply of sodium bicarbonate particles to a blasting nozzle employing pressured air or water as the means for conveying such particles into contact with a surface to be cleaned. A hopper (10) having an inclined bottom surface is provided for containing a mass of sodium bicarbonate particles. One of a plurality of different sized orifices are mounted in a central aperture in the bottom of the hopper and the discharge passage through such orifice is in transverse communication with a pair of pipes. One pipe (15) is exposed to the atmosphere and the other pipe (16) is connected by a hose (17) to a venturi passage provided in the blast nozzle (20), thus creating a suction flow of air through the pipe to convey particles passing downwardly through the selected orifice to be injected into the pressurized fluid passing through the applicating nozzle.