Coke drum bottom throttling valve and system

• US 7,033,460 B2
• Filed: 11/01/2004
• Issued: 04/25/2006
• Est. Priority Date: 09/05/2002
• 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): Caldarola, Glenn
• Assistant Examiner(s): WACHTEL, ALEXIS A
• Application Number:
  US10/873,022
• Publication Number:
  US 20050034969A1
• Time in Patent Office: 540 Days
• Field of Search: 202/217, 202/221, 202/222, 202/239, 202/270, 202/242, 202/244, 202/245, 202/246, 202/247, 202/248, 202/251, 202/252, 202/253, 494/53, 137/15.23, 137/315.12
• US Class Current: 202/217
• 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. A system for preventing the escape of an undue amount of steam from a coke de-heading device as it is being throttled wherein said system is one of

(i) a bottom deheading system

(ii) a top deheading system;

and

(ii) a side deheading system;

said system comprising a shroud enclosure capable of completely surrounding a linear blind gate valve as the blind is actuated thereby containing any released steam or coke debris and preventing that debris from being deposited into the valve bonnet; and

a blind seal assembly having a blind seal slidably engaged against the blind to prevent the flow of steam thereby;

wherein when the blind is in the open position, the one or more shroud return cap return springs bias the shroud end cap end plate to prevent a release of steam pressure from the valve body into the shroud.

2. A system as recited in claim 1, wherein when the blind is in the closed position, a shroud cap end plate of the shroud overcomes a biasing pressure from one or more shroud cap return springs and releases steam pressure from a valve body into the shroud.

3. A system for preventing the escape of an undue amount of steam from a coke de-heading device as it is being throttled, said system comprising a shroud enclosure capable of completely surrounding a linear blind gate valve as the blind is actuated thereby containing any released steam or coke debris and preventing that debris from being deposited into the valve bonnet;

and a blind seal assembly having a blind seal slidably engaged against the blind to prevent the flow of steam thereby;

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.