초록 ▼

A self cleaning port system and method provides for removal of ash deposits and build-up from around a port opening in a combustion device such as an industrial or utility furnace or boiler. The self cleaning port system includes a port structure for providing communication between a source of injec

A self cleaning port system and method provides for removal of ash deposits and build-up from around a port opening in a combustion device such as an industrial or utility furnace or boiler. The self cleaning port system includes a port structure for providing communication between a source of injected material and an interior portion of the combustion device. The port structure can be a burner for injecting fuel and air, an overfire air port, a flue gas recirculation port, a reburning port for injecting a reburning fuel, a pollutant emission control port for injecting NO.sub.x or SO.sub.2 reduction agents, or other types of ports. A blowing member such as a lance is disposed within or formed as part of the port structure and is configured to discharge a blowing medium so as to remove ash deposits adjacent to the port opening. The blowing medium is discharged from the blowing member such that the blowing medium is directed outwardly away from the port opening.

대표청구항 ▼

[ What is claimed and desired to be secured by United States Letters Patent is:] [1.] A system for removing ash deposits in a combustion furnace the system comprising:an outer port sleeve communicatively connected to a combustion furnace and having a port opening through a furnace wall;an inner port

[ What is claimed and desired to be secured by United States Letters Patent is:] [1.] A system for removing ash deposits in a combustion furnace the system comprising:an outer port sleeve communicatively connected to a combustion furnace and having a port opening through a furnace wall;an inner port pipe extending through the outer port sleeve and including an interior passageway for transporting an injected material to an interior portion of the combustion furnace; anda retractable annular blowing lance configured around the inner port pipe such that a blowing medium is transported in an annular passageway defined by an outer wall surface of the inner port pipe and an inner wall surface of the blowing lance, the blowing lance movable in a direction substantially parallel to the direction of flow of the injected material, the blowing lance configured to discharge the blowing medium outwardly away from the port opening at an angle toward or parallel to an interior surface of the furnace wall so as to remove ash deposits in the combustion furnace adjacent to the port opening, the blowing lance capable of being retracted after a cleaning cycle so as to be flush with the furnace wall when not in use.