System and method for rapid opening of coking vessels

• US 5,800,680 A
• Filed: 09/06/1996
• Issued: 09/01/1998
• Est. Priority Date: 09/06/1996
• Status: Expired due to Term

• Current Assignee: Petrã“Leo Brasileiro SA - Petrobras (Presidãªncia Da Repãºblica)
• Original Assignee: Petrã“Leo Brasileiro SA - Petrobras (Presidãªncia Da Repãºblica)
• Inventors: Guerra, Eduardo Cardoso De Melo
• Primary Examiner(s): Cain, Edward J.
• Application Number:
  US08/709,032
• Time in Patent Office: 725 Days
• Field of Search: 201/35
• US Class Current: 201/35
• CPC Class Codes: C10B 25/10 for ovens with vertical chambers
• CPC Class Codes: F16J 13/065 the clamp comprising a ring encircling the flange

Abstract

The present invention relates to a system for fastening and sealing the flanges of the inlets of pressure vessels operating under extreme temperature conditions and with frequent opening/closing cycles, as is the case of coking vessels (5), consisting of an assembly of a flange of the tongue (1) and groove (2) type, a C-clamp (3), and a soft compression gasket (4). Such a system offers total remote control of the opening of the vessel inlets, resulting in greater safety, less unit downtime, and lower operating costs. The invention also relates to a method for opening inlets which results therefrom.

Claims

1. A system for rapid opening of coking vessels under extreme temperature conditions, comprising an assembly for connection of flanges by means of a clamp which has been improved for frequent use, comprising a tongue-type flange (1) and a groove-type flange (2), a C-clamp-type fastening clamp (3) and a non-metallic compression gasket (4) designed to be placed at the interface of the flanges so as to promote sealing of the system.

2. A system according to claim 1, wherein the non-metallic compression gasket (4) is made from hydraulic cardboard.

3. A system according to claim 1, wherein the non-metallic compression gasket (4) is made from compressed asbestos.

4. A method for rapid opening of coking vessels under extreme temperature conditions and with frequent use, comprising releasing, by remote control, the C-clamp-type fastening clamp which connects the flanges of the inlets of the pressure vessel, thereby changing the vessel from the closed state to the open state;

and then disconnecting the external flanges and detaching them from the pressure vessel.

5. A method according to claim 4, wherein the external flanges include a top flange (13) of the vessel (5), which is removed by a displacement device (15) operated by remote control.

6. A method according to claim 4, wherein the external flanges include a bottom flange of the vessel (5) and a flange for interconnection of the charging line;

and in that external flanges are removed, together with a segment (9) of the charging line, by means of a flange-carrying carriage (18) positioned below the flange/line-segment circuit.