Delayed coker isolation valve systems

• US 8,282,074 B2
• Filed: 08/12/2005
• Issued: 10/09/2012
• Est. Priority Date: 03/12/2001
• Status: Expired due to Term

• Current Assignee: DeltaValve, LLC (Circor International Incorporated)
• Original Assignee: Curtiss-Wright Flow Control Corporation (Curtiss-Wright Corporation)
• Inventors: Lah, Ruben F., Larsen, Gary
• Primary Examiner(s): Fristoe, Jr., John K
• Assistant Examiner(s): FAULB, SETH J
• Application Number:
  US11/202,883
• Publication Number:
  US 20070034496A1
• Time in Patent Office: 2,615 Days
• Field of Search: 251/326, 251/327, 251/328, 251/329, 251/194, 251/195
• US Class Current: 251/327
• CPC Class Codes: C10B 25/10 for ovens with vertical chambers
• CPC Class Codes: C10B 27/06 Conduit details, e.g. 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
• CPC Class Codes: F16K 27/044 slide valves with flat obturating members
• CPC Class Codes: F16K 3/0263 using particular material or covering means
• CPC Class Codes: F16K 3/0272 permitting easy assembly or disassembly

Abstract

The present invention provides more efficient, cost effective coke drum isolation valve devices and system as well as more efficient, cost effective methods for isolating the flow of matter from location to another in the delayed coker unit operation where the valve comprises a first seat; a second seat aligned with said first seat; a blind; a main body having an orifice dimensioned to align with an orifice in said line; wherein said main body is coupled to said line; an upper and lower bonnet coupled to said main body, wherein said bonnets may be removed in order to replace valve parts without separating the main body from the line; and a plate located inside a bonnet, wherein the plate comprises a planar surface that contacts a surface of the blind.

Claims

1. An isolation valve system comprising:

a first seat;

a second seat aligned with said first seat;

a blind;

a main body having an orifice dimensioned to align with an orifice in a line, in a coking operation, wherein said main body is coupled to said line;

an upper bonnet and a lower bonnet coupled to said main body; and

a live loaded metal plate located inside one of said upper bonnet and lower bonnet, wherein the metal plate comprises a planar surface that is forced into contact with the blind by a spring actuated mechanism.

2. The isolation system of claim 1, further comprising means for monitoring and controlling pressure existing within said isolation system.

3. The isolation system of claim 1, further comprising metal to metal seating wherein said blind contacts at least one of such said first seat and said second seat.

4. The isolation system of claim 1, wherein said blind is a biased, dual seated blind.

5. The isolation valve system of claim 1, wherein one of said first seat and said second seat is a static seat.

6. The isolation system of claim 1, further comprising an actuator which moves the blind through a bidirectional motion.

7. The isolation system of claim 6, wherein said actuator is controlled from a remote location to increase safety.

8. The isolation system of claim 6, wherein said actuator is selected from the group consisting of:

a hydraulically controlled actuator, an electric actuator, a manual actuator, and a hydraulic actuator powered by electricity.

9. The isolation system of claim 1, further comprising:

a second plate located inside at least one of the upper bonnet and the lower bonnet wherein the second plate comprises a planar surface that may contact another surface of the blind.

10. The isolation system of claim 9, further comprising an additional plate, wherein the additional plate comprise a planar surface that may contact another surface of the blind.

11. The isolation system of claim 1, wherein the contact between the planar surface of the plate and the blind prevents matter in the line from entering one of said upper bonnet and said lower bonnet.

12. The isolation system of claim 9, wherein contact between the planar surface of the plates and the blind prevent matter in the line from entering one of said upper bonnet and said lower bonnet.

13. The isolation system of claim 1, wherein a flange may be attached to said line and may remain attached to said line while other elements of the valve system are repaired or replaced.

14. The isolation system of claim 1, further comprising an extraction system for extracting at least one of the first seat and said second seat through a space created when one of said upper bonnet and said lower bonnet is removed.

15. The isolation system of claim 14, wherein the extraction system comprises a notch in at least one of said first seat and said second seat;

a block that bolts to at least one of the first seat and said second seat; and

an extraction tool which interacts with the block to allow said second seat to be removed from the main body through a space created by removal of at least one of said upper bonnet and said lower bonnet.

16. The isolation system of claim 15, wherein the extraction tool comprises:

a wedge connected to a threaded shaft.

17. An isolation valve system comprising:

a main body comprising an orifice dimensioned to align with an orifice in a line, wherein said main body is coupled to said line;

a first seat;

a second seat aligned with said first seat,

a blind;

an upper bonnet and a lower bonnet coupled to said main body;

a live loaded metal plate located inside one of said upper bonnet and lower bonnet, wherein the plate comprises a planar surface that is forced into contact with the blind by a spring actuated mechanism; and

an extraction system structured to extract at least one of said first seat and said second seat through a space created when said bonnet is removed.

18. The isolation system of claim 17, wherein one of said upper bonnet and said lower bonnet may be removed in order to replace valve parts without separating the main body from the line.

19. The isolation system of claim 17, further comprising means for monitoring and controlling pressure existing within said isolation valve.

20. The isolation system of claim 17, wherein the extraction system comprises a notch in at least one of said first seat and said second seat;

a block coupled to at least one of the seats; and

an extraction tool structured to interact with the block to allow at least one of the seats to be removed from the main body through a space created by a removed bonnet.