Coke drum bottom de-heading system

• US 8,936,701 B2
• Filed: 04/30/2012
• Issued: 01/20/2015
• Est. Priority Date: 03/12/2001
• Status: Expired due to Fees

• Current Assignee: DeltaValve, LLC (Circor International Incorporated)
• Original Assignee: Curtiss-Wright Flow Control Corporation (Curtiss-Wright Corporation)
• Inventors: Lah, Ruben F.
• Primary Examiner(s): Griffin, Walter D
• Assistant Examiner(s): NGUYEN, HUY TRAM
• Application Number:
  US13/460,672
• Publication Number:
  US 20130032465A1
• Time in Patent Office: 995 Days
• Field of Search: 202/241, 202/245, 251/362, 251/159, 251170-174, 251/193, 251/195, 251326-328, 251/333
• US Class Current: 202/242
• CPC Class Codes: C10B 25/10 for ovens with vertical chambers
• CPC Class Codes: F16K 3/02 with flat sealing faces; Packings therefor
• CPC Class Codes: F16K 3/0281 Guillotine or blade-type valves, e.g. no passage through the valve member
• CPC Class Codes: F16K 3/205 by means of cams

Abstract

The present invention features a coke drum de-heading system that includes a de-header valve. The de-header valve includes: (1) a main body; (2) a live loaded seat assembly coupled to the main body and comprising a dynamic, live loaded seat, a live seat adjustment mechanism coupled to the main body and designed to control and adjust the force and resulting seat load of the dynamic, live loaded seat, and a force transfer module in juxtaposition to the dynamic, live loaded seat for transferring the force from the live loaded seat adjustment mechanism to the dynamic, live loaded seat; (3) a static seat positioned opposite from and counteracting or counterbalancing the dynamic, live loaded seat; and (4) a blind or sliding blind capable moving in a linear, bi-directional manner within the de-header valve and between the dynamic, live loaded seat and the static seat.

Claims

1. A coke drum de-heading system comprising:

a coke drum having a flanged orifice;

a de-header valve removably coupled to said flanged orifice of said coke drum and comprising;

a body

a first seat attached to the body;

a second seat aligned in opposition to the first seat attached to the body; and

a blind actuated by an actuator, said blind capable of moving in a bi-directional manner within said de-header valve between an exterior surface of the first and the second seat to control the opening and closing of said de-header valve and to shear said coke from said blind when said blind is caked with coke;

wherein the exterior surface of the second seat includes a groove into which grease containing solid lubricants is flowed to provide lubrication between the exterior surface of the second seat and the blind while the blind is moved in the bi-directional manner, the groove including one or more channels through which the grease is injected into the groove; and

wherein the body contains one or more channels which connect to the one or more channels in the groove through which the grease is flowed from an exterior of the body into the one or more channels in the groove.

2. The coke drum de-heading system of claim 1, wherein the groove extends along only a portion of the exterior surface of the second seat.

3. The coke drum de-heading system of claim 2, wherein the portion is 180°

of the second seat.

4. The coke drum de-heading system of claim 1, wherein the second seat is the bottom seat of the de-header valve such that the groove extends along the top surface of the second seat.

5. The coke drum de-heading system of claim 1, wherein the one or more channels in the body comprise one or more entrance channels which extend from the exterior of the body into the interior of the body, and an interior channel which extends radially underneath the second seat, and wherein the one or more channels in the groove extend vertically down through the second seat and into the interior channel in the body.

6. The coke drum de-heading system of claim 5, wherein the one or more entrance channels each comprise a horizontal portion and a vertical portion, the horizontal portion extending inwardly from an exterior surface of the body to the vertical portion, and the vertical portion extending vertically into the interior channel.

7. The coke drum de-heading system of claim 5, wherein the one or more entrance channels comprise two entrance channels.

8. The coke drum de-heading system of claim 7, wherein the two entrance channels are positioned in the body opposite one another.

9. The coke drum de-heading system of claim 1, wherein the first seat includes a packing comprised of an inner wire mesh core and an outer weave.

10. The coke drum de-heading system of claim 9, wherein the inner wire mesh core comprises a inconel or monel woven wire mesh core.

11. A coke drum de-header valve comprising:

a body

a first seat attached to the body;

a second seat aligned in opposition to the first seat attached to the body; and

a blind actuated by an actuator, said blind capable of moving in a bi-directional manner within said de-header valve between an exterior surface of the first and the second seat to control the opening and closing of said de-header valve and to shear coke from said blind when said blind is caked with coke;

wherein the exterior surface of the second seat includes a groove into which grease containing solid lubricants is flowed to provide lubrication between the exterior surface of the second seat and the blind while the blind is moved in the bi-directional manner, the groove including one or more channels through which the grease is injected into the groove; and

wherein the body contains one or more channels which connect to the one or more channels in the groove through which the grease is flowed from an exterior of the body into the one or more channels in the groove.

12. The coke drum de-header valve of claim 11, wherein the groove extends along only a portion of the exterior surface of the second seat.

13. The coke drum de-header valve of claim 12, wherein the portion is 180°

of the second seat.

14. The coke drum de-header valve of claim 11, wherein the second seat is the bottom seat of the de-header valve such that the groove extends along the top surface of the second seat.

15. The coke drum de-header valve of claim 11, wherein the one or more channels in the body comprise one or more entrance channels which extend from the exterior of the body into the interior of the body, and an interior channel which extends radially underneath the second seat, and wherein the one or more channels in the groove extend vertically down through the second seat and into the interior channel in the body.

16. The coke drum de-header valve of claim 15, wherein the one or more entrance channels each comprise a horizontal portion and a vertical portion, the horizontal portion extending inwardly from an exterior surface of the body to the vertical portion, and the vertical portion extending vertically into the interior channel.

17. The coke drum de-header valve of claim 15, wherein the one or more entrance channels comprise two entrance channels.

18. The coke drum de-header valve of claim 17, wherein the two entrance channels are positioned in the body opposite one another.

19. The coke drum de-header valve of claim 11, wherein the first seat includes a packing comprised of an inner wire mesh core and an outer weave.

20. The coke drum de-header valve of claim 19, wherein the inner wire mesh core comprises a inconel or monel woven wire mesh core.