FUEL FLUIDIZING NOZZLE ASSEMBLY

摘要

A grate assembly 10 for a fluidized bed reactor 12 includes a plurality of parallel air ducts 14 extending side-by-side in a substantially horizontal plane and defining spaces 18 therebetween through which coarse material from the fluidized bed descends. A plurality of nozzle assemblies 50 is attached to each air duct 14 for supplying fluidizing air from within the air duct 14 into the fluidized bed. Each of the nozzle assemblies 50 includes a nozzle 52 formed from a tube 30 having an inlet end 31 in fluid communication with the air duct 14, and an outlet end 72 in fluid communication with the inlet end 31. An orifice 56 is disposed at the outlet end 72 of the nozzle 52, and the nozzle 52 is bent proximate the outlet end 72 to direct a primary direction of a stream of fluidizing air flowing from the orifice 56 toward the air duct such that an angle ? between the primary direction and the substantially horizontal plane formed by the air ducts 14 is between about 30 to about 90 degrees.