Coke drum bottom de-heading system

• US 8,679,299 B2
• Filed: 06/13/2005
• Issued: 03/25/2014
• 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): Leung, Jennifer A
• Application Number:
  US11/151,055
• Publication Number:
  US 20050279621A1
• Time in Patent Office: 3,207 Days
• Field of Search: 202/105, 202/120, 202/217, 202/221, 202/222, 202/239, 202/242, 202/244, 202/245, 202/252, 202/262, 202/270, 251/170, 251/174, 251/193, 251/195, 251326-329, 201/41
• 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 3/205 by means of cams

Abstract

The present invention features a coke drum de-heading system comprising (a) at least one coke drum having an orifice therein; (b) a de-header valve removably coupled to the coke drum designed to de-head the coke drum; and (c) an exchange system, including an upper and lower bonnet and other elements and members adapted to integrate the de-heading system, and particularly the de-header valve, into the manufacturing system. The de-header valve itself comprises (1) a main body having an orifice dimensioned to align with and couple to, in a concentric relationship, the orifice of the coke drum; (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, such that upon actuation of the blind from a closed position to an open position, the coke drum is de-headed.

Claims

1. A coke drum de-heading valve comprising:

a flanged orifice for connection to a coke drum;

a seat assembly comprising at least one dynamic, live loaded seat assembly, each dynamic, live loaded seat assembly including a force applicator, a force transfer module having an angled portion, and a dynamic, live loaded seat that has an angled portion that corresponds to the angled portion of the force transfer module such that when the force applicator applies force to the force transfer module in a first direction, the interaction of the angled portions of the force transfer module and of the dynamic, live loaded seat causes the live loaded seat to be forced in a direction generally perpendicular to the first direction; and

a blind actuated by an actuator;

wherein the at least one dynamic live loaded seat maintains continuous metal to metal contact with the blind during coking of the drum and during variation in temperature, wherein the dynamic, live loaded seat is structured to move axially while said blind is actuated between an open and a closed position adjusting a load applied to the blind in order to compensate for bowing of the blind during coking of the drum.

2. The coke drum de-heading valve of claim 1, further comprising one of a pressure valve, a steam purge inlet valve and an emergency vent valve for monitoring and controlling pressure existing within said valve.

3. The coke drum de-heading valve of claim 1, wherein the at least one dynamic, live loaded seat assembly comprises one dynamic, live loaded seat assembly, the coke drum de-heading valve further comprising a static seat assembly positioned opposite the dynamic, live loaded seat assembly, and wherein said blind is a biased, dual blind positioned between the dynamic, live loaded seat assembly and the static seat assembly.

4. The coke drum de-heading valve of claim 1, wherein each dynamic, live loaded seat assembly includes a plurality of biasing elements or load bearing members to bias the force transfer module to thereby bias the dynamic, live loaded seat to allow axial movement of the dynamic, live loaded seat.

5. The coke drum de-heading valve of claim 1, wherein said valve is a top de-heading valve.

6. The coke drum de-heading valve of claim 1, wherein said de-heading valve further comprises a main body having an orifice dimensioned to align, in a concentric relationship, with an orifice in said coke drum.

7. The coke drum de-heading valve of claim 1, further comprising an upper bonnet and a lower bonnet coupled to opposing ends of said de-heading valve.

8. The coke drum de-heading valve of claim 1, wherein each dynamic, live loaded seat assembly further includes a plunger between the force applicator and the force transfer module.

9. The coke drum de-heading valve of claim 8, wherein the plunger is biased with a spring.

10. The coke drum de-heading valve of claim 1, wherein the force applicator is adjustable manually, hydraulically, or pneumatically to adjust the force applied to the dynamic, live loaded seat.

11. The coke drum de-heading valve of claim 1, wherein the seat assembly comprises a dynamic, live loaded upper seat and a static lower seats.

12. The coke drum de-heading valve of claim 1, wherein the seat assembly comprises a dynamic, live loaded upper seat and a dynamic, live loaded lower seat.

13. The coke drum de-heading valve of claim 1, wherein each dynamic, live loaded seat assembly further includes one or more seat retaining rings that prevent the force transfer module from moving in a direction perpendicular to the first direction.