Coke drum discharge system

• US 20030089589A1
• Filed: 05/31/2002
• Published: 05/15/2003
• Est. Priority Date: 11/09/2001
• Status: Active Grant

• Current Assignee: Foster Wheeler USA Corporation (John Wood Group PLC)
• Original Assignee: Foster Wheeler USA Corporation (John Wood Group PLC)
• Inventors: Malsbury, Allen S.
• Granted Patent: US 7,247,220 B2
• Time in Patent Office: Days
• US Class Current: 202/262
• CPC Class Codes: B01J 2208/00761 Discharging
• CPC Class Codes: B01J 8/003 in a downward flow
• CPC Class Codes: C10B 33/00 Discharging devices; Coke guides
• CPC Class Codes: C10B 33/12 Discharge valves
• CPC Class Codes: C10B 55/00 Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material cracking oils C10G

Abstract

An apparatus including a coke drum for coking hydrocarbon substances, a valve disposed near the bottom of the coke drum, and a discharge conduit for removing coke from the coke drum, wherein the discharge conduit is connected to the valve such that when the valve is open, the coke may be removed via the discharge conduit.

Claims

1. An apparatus comprising:

a coke drum for coking hydrocarbon substances;

a valve disposed near the bottom of said coke drum; and

a discharge conduit for removing coke from said coke drum,

wherein said discharge conduit is connected to said valve such that when said valve is open, the coke can be removed via said discharge conduit.

2. An apparatus according to claim 1, wherein said discharge conduit comprises a mitered bend.

3. An apparatus according to claim 2, wherein said mitered section is overlaid.

4. An apparatus according to claim 1, further comprising another valve, which is disposed beneath said valve, such that if said valve leaks, said other valve contains the contents of said coke drum.

5. An apparatus according to claim 1, further comprising a steam supply to said coke drum configured to cause said valve to fail safe.

6. An apparatus according to claim 1, further comprising a steam supply connected to said valve at a higher pressure than exists upstream of said valve.

7. An apparatus according to claim 1, wherein said discharge conduit is a pipe.

8. An apparatus according to claim 1, wherein said discharge conduit is a chute with an open top.

9. An apparatus according to claim 1, further comprising:

a side conduit for feeding or draining said coke drum,

said apparatus being adapted such that when said valve is closed, the hydrocarbon substance can be fed from said side conduit.

10. An apparatus according to claim 1, wherein said discharge conduit is coupled to said valve which is coupled to said coke drum, such that no gap is formed between the bottom of said coke drum and a proximal end of said discharge conduit.

11. An apparatus according to claim 1, wherein said valve is a ball valve.

12. A closed system for discharging coke from a coke drum, comprising:

a discharge conduit disposed beneath the coke drum; and

a ball valve interconnecting said discharge conduit and the coke drum,

wherein coke exiting the coke drum is enclosed until exiting said discharge conduit.

13. A discharge system for a coke drum, comprising:

a coke drum;

a side conduit for feeding petroleum to said coke drum;

guiding means for guiding coke from said coke drum; and

sealing means for sealing coke in said coke drum.

14. A discharge system according to claim 13, wherein said guiding means includes a pipe.

15. A discharge system according to claim 13, wherein said guiding means includes a pipe and a mitered bend.

16. A discharge system according to claim 13, wherein said sealing means comprises a ball valve.

17. A discharge system according to claim 13, further comprising a steam supply connected to said sealing means for supplying steam to said coke drum.