Abstract: A cleaning tool for removing deposits from plural surfaces, such as the precipitator plates and wires and the like of coal burning electrical power plants or other fossil fuel combustion systems. The tool includes multiple jets which deliver high pressure streams of water or other liquid in opposite directions for simultaneous cleaning of parallel surfaces. One or more jets are also provided for spraying in a direction perpendicular to the direction of the sprays of the multiple jets for removing deposits from the wires disposed between the surfaces. The tool is coupled to a high pressure fluid source and may be lowered or raised between the plates for effective cleaning.

Abstract: A hydrocannon system for removing deposits from surfaces, such as in the cyclone burner of an electrical generating station. A high pressure spray of water is propelled through the nozzle of a gun at high pressure to hydroblast material to be cleaned from the surface. The gun is self supported on a rack for adjustable vertical movement, up and down tilting movement, and swinging movement about an axis for a 360.degree. arc.