Solids feed control valve assembly

Details Solids feed control valve assembly Solids feed control valve assembly

1985-01-07

1985-11-12

Nase, Jeffrey V.

Conveyors: fluid current

With diverse power-driven conveyor

Rotary

48 86A, 137240, 239112, 239456, 406163, 406174, B65G 5348

Patent

active

045524904

ABSTRACT:
A control valve assembly for controlling particulate solids feed upward into 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 a stem clearance space are each purged by a clean externally supplied gas, the solids flair in an elbow-shaped passageway are fluidized by air supplied through booster nozzles, and the valve stem is operated by a pneumatic actuator. A particulate solids material such as coal is transferred by a screw conveyor through a horizontal conduit, and then fed through the elbow-shaped passageway and the poppet valve seat upwardly into the reactor fluidized bed.

REFERENCES:
patent: 717634 (1903-01-01), Smead
patent: 2321015 (1943-06-01), Davis
patent: 3133554 (1964-05-01), Joebken
patent: 3693842 (1972-09-01), Cozzarin et al.
patent: 4194523 (1980-03-01), Lubieniecki
patent: 4318355 (1982-03-01), Nelson

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