Coke drum bottom throttling valve and system

• US 20060175188A1
• Filed: 02/13/2006
• Published: 08/10/2006
• Est. Priority Date: 09/05/2002
• Status: Active Grant

• Current Assignee: DeltaValve, LLC (Circor International Incorporated)
• Original Assignee: Curtiss-Wright Flow Control Corporation (Curtiss-Wright Corporation)
• Inventors: Lah, Ruben F., Larsen, Gary
• Granted Patent: US 7,399,384 B2
• Time in Patent Office: Days
• US Class Current: 202/269
• CPC Class Codes: C10B 25/10 for ovens with vertical chambers
• CPC Class Codes: F16K 3/312 Line blinds
• CPC Class Codes: Y10T 137/0514 Gate valve
• CPC Class Codes: Y10T 137/6014 Faucet type [e.g., domestic water use, etc.]
• CPC Class Codes: Y10T 137/6017 Including removable valve head and seat unit
• CPC Class Codes: Y10T 137/6038 Particular valve seat or interface seal
• CPC Class Codes: Y10T 137/6041 Replaceable
• CPC Class Codes: Y10T 137/6072 Gate valve
• CPC Class Codes: Y10T 137/6075 Bifaced

Abstract

A coke drum bottom de-heading system having an internal shroud enclosure and a shroud end cap opened by a flange to a coke bottom de-heading valve capable of accepting the end of a gate valve upon actuation. Acting in coordination with the shroud enclosure to prevent the escape of steam is a gate seal assembly having a gate seal slidably engaged against the sliding gate to prevent the passage of steam thereby.

Claims

1-6. -6. (canceled)

7. A system for preventing the escape of steam from a coke de-heading device comprising:

a deheading device;

a blind;

a blind seal; and

a shroud surrounding a blind and blind seal.

8. A system as recited in claim 7, wherein the blind is configured to selectively slide between an opened position and a closed position.

9. A system as recited in claim 7, further comprising one or more shroud cap return springs which bias a shroud cap end plate to prevent the release of steam from the valve body into the shroud.

10. A system as recited in claim 7, further comprising a shroud cap end plate which selectively overcomes a biasing pressure from one or more shroud cap return springs to release steam pressure.

11. A system as recited in claim 7, wherein the system is one of:

(i) a bottom de-heading system;

(ii) a top de-heading system; and

(iii) a side de-heading system.

12. A system as recited in claim 7, further comprising a gate seal assembly coupled to a body of the blind gate valve, wherein the gate seal assembly is configured to float within a guide cup to reduce an amount of steam from escaping from the body when pressurized.

13. A system as recited in claim 7, wherein the deheading device is selected from a list consisting of:

a dual seated deheading device, a linear motion deheading device, and a goggle blind valve deheading device.

14. In a coke drum deheading system, a method comprising:

surrounding a gate valve of a coke deheading system with a shroud; and

slideably engaging a blind against a blind seal assembly.

15. A method as recited in claim 14, wherein the blind is configured to selectively slide between an opened position and a closed position.

16. A method as recited in claim 15, further comprising the step of allowing a shroud cap end plate of the shroud to overcome a biasing pressure from one or more shroud cap return springs to release steam pressure from the valve body.

17. A method as cited in claim 16, further comprising the step of allowing one or more shroud cap return springs to bias the shroud cap end plate to prevent the continued release of steam

18. The method as recited in claim 14, wherein the deheading system is selected from a list consisting of:

a bottom deheading system;

a top deheading system; and

a side deheading system.

19. A method as recited in claim 14, wherein the deheading device is selected from a list consisting of:

a dual seated deheading device;

a linear motion deheading device; and

a goggle blind valve deheading device.