Flue gas exhaust system, duct, industrial furnace, and plant

Patent metadata

Field	Value
Publication number	US-2019257518-A1
Application number	US-201716315583-A
Country	US
Kind code	A1
Filing date	Jul 6, 2017
Priority date	Jul 6, 2016
Publication date	Aug 22, 2019
Grant date	—

Abstract

The present disclosure relates to a flue gas exhaust system for an industrial furnace, especially a steam reforming furnace. The flue gas exhaust system comprises a stack having an inlet opening for introducing flue gas into the stack and an outlet opening for exhausting flue gas. The inlet opening of the stack is in fluid connection to an outlet of a heat recovery system of the industrial furnace. Further, the fluid connection between said heat recovery system outlet and said stack inlet opening comprises a transition flue gas duct that at least partly embraces a part of the stack.

First claim

1 . Flue gas exhaust system for an industrial furnace comprising a stack having an inlet opening for introducing flue gas into the stack and an outlet opening for exhausting flue gas, wherein the inlet opening of the stack is in fluid connection to an outlet of a heat recovery system of the industrial furnace, and wherein the fluid connection between said heat recovery system outlet and said stack inlet opening comprises a transition flue gas duct that at least partly embraces a part of the stack.

2 . Flue gas exhaust system according to claim 1 , wherein the part of the stack at least partly embraced by the transition flue gas duct is formed by a lower part of the stack.

3 . Flue gas exhaust system according to claim 1 , further comprising a fluid accelerator.

4 . Flue gas exhaust system according to claim 3 , wherein the fluid accelerator is located in a fluid connection path between the heat recovery system outlet and the stack inlet opening.

5 . Flue gas exhaust system according to claim 3 , wherein the fluid accelerator is provided with a flue gas inlet opening in fluid connection with a flue gas outlet opening of the transition flue gas duct, and wherein the fluid accelerator further is provided with a flue gas outlet opening in fluid connection with the inlet opening of the stack.

6 . Flue gas exhaust system according to claim 3 , wherein, when seen from above, the heat recovery system and the fluid accelerator are located substantially at opposite sides of the stack.

7 . Flue gas exhaust system according to claim 3 , wherein, when seen from above, the outlet of the heat recovery system and the inlet of the fluid accelerator are located substantially at opposite sides of the stack.

8 . Flue gas exhaust system according to claim 1 , wherein the transition flue gas duct comprises a left flank and a right flank, the left transition flue gas duct flank extending along a left side of the stack and the right transition flue gas duct flank extending along a right side of the stack.

9 . Flue gas exhaust system according to claim 3 , wherein the transition flue gas duct comprises at least one fluid accelerator inlet duct for connection to an inlet of the fluid accelerator.

10 . Transition flue gas duct, arranged for use in a flue gas exhaust system according to claim 1 .

11 . Transition flue gas duct, according to claim 10 , for providing at least a part of a fluid connection between an outlet of a heat recovery system of an industrial furnace and an inlet of a stack for exhausting flue gas exiting said heat recovery system, wherein the transition flue gas duct is arranged for at least partly embracing a part of the stack.

12 . Industrial furnace comprising a flue gas exhaust system according to claim 1 .

13 . Industrial furnace according to claim 12 , further comprising a heat recovery system that comprises a so-called convection section, wherein one or multiple main convection ducts of said convection section are extending substantially horizontally.

14 . Industrial furnace according to claim 12 , wherein the steam reforming furnace is arranged for hydrogen production, methanol production, ammonia production, carbon monoxide production, or production of another useful product.

15 . Plant comprising a transition flue gas duct according to claim 10 .

16 . Flue gas exhaust system according to claim 1 , wherein the industrial furnace is a steam reforming furnace.

17 . Flue gas exhaust system according to claim 3 , wherein the fluid accelerator includes a fan.

18 . Industrial furnace according to claim 12 , wherein the industrial furnace is a steam reforming furnace.

19 . Plant comprising a flue gas exhaust system according to claim 1 .

20 . Plant comprising an industrial furnace according to claim 12 .

Assignees

• Technip France

Inventors

• Robbers Jacobus

Classifications

• C01B2203/068

  Ammonia synthesis · CPC title

• F22B37/36

  Arrangements for sheathing or casing boilers · CPC title

• C01B2203/0233

  the reforming step being a steam reforming step · CPC title

• C01B3/34

  by reaction of hydrocarbons with gasifying agents · CPC title

• C01B2203/0205

  containing a reforming step · CPC title