PULVERULENT MATERIAL METERING AND DELIVERY SYSTEM AND METHOD

摘要

A meterinq and delivery system for feeding finely powdered coal to a combustion chamber includes a hopper containing finely ground coal, a vertical food pipe extends from the hopper and a horizontal metering conduit is connected to the lower end of the feed pipe so that the coal provide a surface of repose in the metering conduit be1ow an air low opening with a bleed opening being downstream of the air flow opening. A venturi jet housing provides suction on the metering conduit drawing ambient air into the opening to entrain coal for injection by an injector lance into a combustion space. Meterinq of the coal is provided by inversely operated valves through which ambient air flows to the openings in the metering conduit.