Safe and automatic method for removal of coke from a coke vessel
First Claim
1. A process for repetitively producing and removing coke from a delayed coker vessel, wherein the coker vessel has a bottom portion defining an aperture through which coke is released, comprising:
- (a) Sealing an aperture closure housing to the bottom portion of the coker vessel;
(b) moving a closure member within the closure housing to close the aperture;
(c) feeding a heavy hydrocarbon feed into the coker vessel through a feed line attached to the coker vessel at a position above the bottom of the coker vessel;
(d) coking the heavy hydrocarbon in the coker vessel;
(e) moving the closure member within the closure housing to open the aperture to allow coke removal from the coker vessel; and
(f) releasing coke through the aperture, and;
(g) repeating steps c through f successively.
1 Assignment
0 Petitions
Accused Products
Abstract
A closed system that eliminates worker exposure during coker vessel decoking operations and thereby significantly reduces risks to workers also increase coking capacity by reducing the coking cycle time. The closed system preferably comprises a coker vessel with a side entry feed line attached to the vessel above the vessel bottom; a closure housing with laterally moveable closure member therein sealed to the vessel bottom either directly without, or indirectly with an adapting spool member and; a coke chute sealed to the bottom of the closure housing. The system can be remotely and repetitively operated through numerous coking/decoking cycles without removal of any system element.
103 Citations
23 Claims
-
1. A process for repetitively producing and removing coke from a delayed coker vessel, wherein the coker vessel has a bottom portion defining an aperture through which coke is released, comprising:
-
(a) Sealing an aperture closure housing to the bottom portion of the coker vessel;
(b) moving a closure member within the closure housing to close the aperture;
(c) feeding a heavy hydrocarbon feed into the coker vessel through a feed line attached to the coker vessel at a position above the bottom of the coker vessel;
(d) coking the heavy hydrocarbon in the coker vessel;
(e) moving the closure member within the closure housing to open the aperture to allow coke removal from the coker vessel; and
(f) releasing coke through the aperture, and;
(g) repeating steps c through f successively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A coker vessel comprising:
-
(a) a vessel having a flanged side aperture and a flanged bottom aperture;
(b) a flanged feed pipe fitted to said flanged side aperture;
(c) an aperture closure unit fitted and sealed to said bottom aperture;
(d) a closure member moveable within said closure unit;
(e) A coke chute sealed to the bottom portion of the closure unit for directing coke from the vessel to a receiving area. - View Dependent Claims (20, 21, 22, 23)
-
Specification