Replacement of particles in a moving bed process
AssigneeUop LLC
InventorsRoger Reed Lawrence, Frank T. Micklich, Charles T. Ressl, Paul Alvin Sechrist
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Abstract
An apparatus for replacing particles in a process that transfers particles is disclosed. The apparatus employs a seal zone which is in communication with two zones of the process and in which particles that are being added to the process are purged. The apparatus allows particles to be replaced without reducing the normal rate of particle transfer through the process, which results in a savings in downtime costs. This invention is adaptable to a multitude of processes for the catalytic conversion of hydrocarbons in which deactivated catalyst particles are regenerated.
Claims11
An apparatus for the transfer of particles, said apparatus comprising:
- (a) a vertically-positioned first vessel having a first particle outlet;
- (b) a vertically-positioned second vessel, which is located below said first vessel, having a first particle inlet and a second particle outlet, and through which particles may move by gravity from said first particle inlet to said second particle outlet, and which defines a lower portion for containing particles, a means for gas addition, means to distribute gas about said lower portion of said second vessel for contact with particles in said second vessel, and a gas outlet;
- (c) a vertically-positioned third vessel, which is located below said second vessel having a second particle inlet,
- (d) a vertically-extended first conduit in communication with said first particle outlet to remove particles therefrom and for containing a gas flow restriction comprising a bed of particles;
- (e) a vertically-extended second conduit in communication with said first conduit to remove particles therefrom and in communication with said first particle inlet to supply particles thereto;
- (f) means for communicating gas from said gas outlet to said first vessel and restricting the flow of gas from said gas outlet;
- (g) a vertically-extended third conduit in communication with said second particle outlet to remove particles therefrom and in communication with said second particle inlet to supply particles thereto;
- (h) means for discharging particles from said first vessel;
- and
- (i) a third particle inlet in communication with said second vessel.
Dependencies are inferred from the claim text.