Solids feed control valve assembly

Details Solids feed control valve assembly Solids feed control valve assembly

F - Mech Eng,Light,Heat,Weapons

23

K

110/25

F23K 3/00 (2006.01) B01J 8/18 (2006.01) B65G 33/14 (2006.01) C10J 3/56 (2006.01) F16K 25/02 (2006.01)

Patent

CA 1227971

ABSTRACT OF THE DISCLOSURE A control valve assembly for controlling particulate solids feed to a fluidized bed reactor, utilizing a purged valve seat mating with a poppet head and valve stem having a vented clearance space. The valve seat surface and stem clearance are each purged by a clean externally supplied gas, the solids in the elbow passageway are fluidized by air supplied through booster nozzles, and the valve stem is operated by pneumatic actuator means. A particulate solids material such as coal is transferred by a screw conveyor through a horizontal conduit, and then fed through an elbow-shaped passageway and the poppet valve seat upwardly into the reactor fluidized bed.

450138

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