Sonic Horns are compressed-air driven acoustic cleaners that produce low-frequency, high-energy sound waves. The sound waves are produced by compressed air flexing a titanium diaphragm in the Horn's sound generator. The sound waves are then magnified as they are emitted through the Horn's bell, and travel at > 1100 ft/sec in a 360º radial pattern. The Sonic Horn is placed in the vessel at strategic locations, and then air pressure and volume are controlled remotely from outside the vessel. Alternative sound waves, repeating 60-420 times per second, produce a range of fundamental frequencies that cause dry particulate deposits to resonate and become fluidized. Once fluidized, gravity causes the material to flow freely to the discharge. Because Sonic Horns operate at frequencies higher than the resonance frequency of steel, ceramic linings, concrete, etc, they do not cause vibrational damage to the vessel or surrounding structure. Suitable for explosive environments, Sonic Horns have been used in vessel cleaning, precipitators, heat exchangers, filters, bags, ducts, spray dryers, and cyclones.
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