GAS INJECTING KILN SHELL NOZZLE WITH PARTICLE ENTRY BARRIERS

摘要

GAS INJECTING KILN SHELL NOZZLE WITH PARTICLE ENTRY BARRIERS A port assembly for delivering fluid through a shell of a rotary kiln is disclosed with structures for screening and excluding particulate matter from the port during operation of the kiln. The port assembly comprises a cylindrical nozzle defining a nozzle orifice to deliver fluid to the interior of a kiln. A base member secured to one side of the nozzle is provided with a platform extending partly through the nozzle orifice and cooperates with the nozzle to define an annular chamber. Facing surfaces of the base member and nozzle define a fluid distribution cavity for providing fluid to the annular chamber for ultimate distribution into the kiln. An annular shoulder surrounding the platform within the fluid distribution cavity cooperates with a facing surface of the nozzle to define a particle barrier gap. The annular chamber and particle barrier gap form a screening mechanism whereby particles too large to pass into the chamber are excluded and particles small enough to pass into the chamber are excluded by the gap. Passage of particle smaller than the particle barrier sap through the gap is opposed and flushed by a turbulent flow of fluid from the fluid distribution cavity.