Isolation chamber for removable startup burner

Patent metadata

Field	Value
Publication number	US-10047957-B2
Application number	US-201715466142-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Feb 14, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

The present disclosure describes an assembly configured to mitigate the harmful effects of smelt fouling, airflow interference, and operator exposure to hot air from the furnace and wind box through use of an extractable startup burner and an isolation chamber engaged to a windbox. The present disclosure also describes a method for safely extracting a startup burner from an active recovery boiler as has method for inserting an extractable startup burner into a recovery boiler during operation.

First claim

What is claimed is:

1. A multi-door isolation chamber and removable startup burner assembly configured to engage a recovery boiler furnace wall around an opening in a recovery boiler furnace, the multi-door isolation chamber and removable startup burner assembly comprising:
a removable startup burner;
a housing;
an inner door configured to selectively occlude a first multi-door isolation chamber opening defined by a side of the housing;
an outer door distally disposed from the inner door, wherein the outer door is configured to selectively occlude a second multi-door isolation chamber opening defined by an outer face of the multi-door isolation chamber; and
an internal space defined by the housing, the inner door, and the outer door, wherein the internal space is configured to encompass the removable startup burner, wherein the internal space is configured to isolate an extracted portion of the removable startup burner, and wherein the internal space is configured to align with the opening in the recovery boiler furnace.

2. The multi-door isolation chamber of claim 1 , wherein the inner door further comprises a first inner door opposite a second inner door.

3. The multi-door isolation chamber of claim 2 , wherein the first inner door further comprises a cut-out section configured to complement a portion of a perimeter of the removable startup burner.

4. The multi-door isolation chamber of claim 3 , wherein the second inner door is configured to complement the cut-out section of the first inner door in a closed position.

5. The multi-door isolation chamber of claim 2 , wherein the first inner door and second inner door further comprise a runner slidably engaged to a track disposed proximate to an inner wall of the multi-door isolation chamber.

6. The multi-door isolation chamber of claim 2 , wherein the first inner door and the second inner door are hingedly mounted proximate to an inner wall of the multi-door isolation chamber.

7. The multi-door isolation chamber of claim 1 , wherein the recovery boiler furnace wall is a windbox.

8. The multi-door isolation chamber of claim 1 further comprising a support engaged to the housing, wherein the support is configured to support the removable startup burner.

9. The multi-door isolation chamber of claim 1 , wherein the outer door further comprises a first outer door opposite a second outer door, wherein the first outer door and second outer door further comprise a cut-out section configured to complement a portion of a perimeter of the removable startup burner.

10. An isolation chamber and removable startup burner assembly comprising:
a removable startup burner;
a housing, the housing having at least one side wall defining an internal space, the at least one side wall having an inner wall surface, wherein the internal space is configured to encompass the removable startup burner, wherein the housing is configured engage a recovery boiler furnace wall around an opening, and wherein the internal space is configured to align with the opening in the recovery boiler furnace;
a valve disposed at a first end of the housing, wherein the valve is configured to separate the internal space from the opening in the recovery boiler furnace wall when the removable startup burner is not extending through the valve; and
a plug having an area configured to be disposed within the internal space, such that an outer perimeter of the plug forms a seal with the inner wall surface.

11. The isolation chamber of claim 10 , wherein the housing is a burner guide sleeve.

12. The isolation chamber of claim 10 , wherein the recovery boiler furnace wall is a windbox.

13. The isolation chamber of claim 12 , wherein the housing is disposed in the windbox.

14. The isolation chamber of claim 12 , wherein the plug comprises poly-amide-based plastic or other high-density, lightweight material configured to withstand air temperature in the windbox.

15. The isolation chamber of claim 10 , wherein the valve is a flapper valve.

16. The isolation chamber of claim 14 , wherein the housing further comprises a front lip at the first end, and wherein a flapper valve is hingedly engaged to the housing such that the flapper valve is disposed on the front lip when the removable startup burner is not extending through the flapper valve.

17. The isolation chamber of claim 10 , wherein the plug further defines a plug orifice, and wherein the removable startup burner is configured to be disposed in the plug orifice such that a body of the removable startup burner creates a seal with the plug.

18. The isolation chamber of claim 17 , wherein the body of the removable startup burner is configured to slide through the plug orifice.

19. The isolation chamber of claim 10 , wherein a length of the area of the plug disposed within the internal space corresponds to a distance between the valve and a second end of the housing.

20. An isolation chamber comprising:
a housing, the housing having at least one side wall defining an internal space, the at least one side wall having an inner wall surface, wherein the internal space is configured to encompass a removable startup burner, wherein the housing is configured to engage with a recovery boiler furnace wall around an opening, and wherein the internal space is configured to align with the opening in the recovery boiler furnace;
a valve disposed at a first end of the housing, wherein the valve is configured to separate the internal space from the opening in the recovery boiler furnace wall when the removable startup burner is not extending through the valve, wherein the housing further comprises a front lip at the first end, and wherein the valve is a flapper valve hingedly engaged to the housing such that the flapper valve is disposed on the front lip when the removable startup burner is not extending through the flapper valve; and
a plug having an area configured to be disposed within the internal space, such that an outer perimeter of the plug forms a seal with the inner wall surface.

Assignees

• Andritz Inc

Inventors

• Imig Gregory Alan

Classifications

• F23Q13/04 Primary

  using portable burners, e.g. torches, fire pots · CPC title

• F23D2900/21

  Burners specially adapted for a particular use · CPC title

• D21C11/122

  Treatment, e.g. dissolution, of the smelt · CPC title

• F23D14/78

  Cooling burner parts · CPC title

• F23C5/06

  Provision for adjustment of burner position during operation · CPC title