Continuous catalyst extraction valve with line cleaning feature

Details Continuous catalyst extraction valve with line cleaning feature Continuous catalyst extraction valve with line cleaning feature

2007-05-22

2007-05-22

Fox, John (Department: 3753)

Valves and valve actuation

With selective flow regulation

Different sized bores in valve head

C137S625470

Reexamination Certificate

active

10906905

ABSTRACT:
A ball valve apparatus10for clearing an obstruction in a conduit is disclosed. The ball valve apparatus10incorporates a wear resistant choke tube42in the downstream opening40B of the ball36. The choke tube42can be two to four times smaller than the opening40A on the upstream side of the ball36. Removal of catalyst through the choke tube results in lower velocity of the flow through the bore of the valve, thereby reducing wear and erosion. In normal operation in an FCC unit, catalyst is extracted from the system through the choke tube42. When the conduit becomes plugged, the ball valve apparatus10can be cycled into a fully opened position, thereby creating a high flow rate of fluid through the conduit, removing any existing obstructions.

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