Fluid jet apparatus and method for cleaning material from the inside of a tubular conduit utilizing a cleaning head that lies adjacent to one wall of the conduit and includes at least two fluid jet forming means for directing a plurality of high pressure fluid cutting jets in a forward direction and at an acute angle relative to the axis of the head and the conduit so that they are directed toward the opposite wall of the conduit. The cleaning head is rotated around and remains adjacent to the wall of the conduit and is advanced into the conduit as the jets cut away the material whereby the fluid jets create an asymmetric cutting pattern on the surface of the material and the counter thrust of the fluid jets keeps the cleaning head offset relative to the axis of the conduit and against the wall of the conduit to provide passage for removal of the cut material and spent fluid away from the cutting area and out the end of conduit.
A method and apparatus for cleansing the upper interior surfaces of a concrete sewer conduit, the apparatus including the concrete sewer pipe and a plurality of spray nozzles spaced apart and adapted to be introduced into and disposed in and along a length of concrete sewer to enable continuous or intermittent spraying of the upper interior surface or, alternatively, to be permanently mounted along the length of the concrete sewer conduit when newly constructed.
A silo which is impeded by a mass of cohering particles is cleaned by extending at least one flexible tube connected to a mace into the silo to near the coherent mass and flowing gas through the tube and mace at a rate and pressure causing swinging and writhing movements by the mace and tube.
An on-line system for cleaning dirty gas firing nozzles of an operating industrial gas turbine including injecting a suitable cleaning chemical at a specified rate into the gas fuel line just ahead of where the line enters the header supplying the nozzles through an injector quill equipped with a metering pump and check valves and tied into a chemical cleaner supply.
Accumulated debris is removed from building ducts by agitating the debris, with a nozzle-headed air hose, as air flows through the ducts. The nozzle has ports arranged so that air jets cause the hose to whip around inside the ducts. A borescope is used to simultaneously monitor progress of the cleaning. Filters are provided over all duct openings to collect debris and prevent it from escaping during cleaning.
A method of cleaning and coating water conducting pipes is provided wherein a mixture of water and compressed air is forced through the emptied pipe system to rough clean such system, a pressurized acid is introduced into the pipe system and allowed to react with the interior surface of the pipes for a predetermined period of time. The acid is then drained from the pipes, and the interior of the pipes is dried by compressed air. A pressurized liquid plastic is then introduced into the pipes to coat the pipes with the excess plastic being subsequently drained from the pipe system.
