Perforated flame holder and system including protection from abrasive or corrosive fuel

Patent metadata

Field	Value
Publication number	US-10514165-B2
Application number	US-201715637820-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jul 29, 2016
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A burner system that employs a perforated flame holder and is configured to combust a powdered solid fuel includes a structure configured to protect the perforated flame holder from erosion caused by particles of the solid fuel.

First claim

What is claimed is:

1. A combustion system, comprising:
a perforated flame holder, including:
an input face,
an output face on a side opposite from, and substantially parallel to, the input face, and
a plurality of apertures extending between the input face and the output face;

an electrically conductive erosion guard adjacent to the input face and configured to protect the perforated flame holder from erosion;
an electrically conductive counter electrode adjacent to the output face; and
a voltage source configured to generate a plasma within the perforated flame holder by applying a voltage between the erosion guard and the counter electrode.

2. The combustion system of claim 1 , wherein the voltage source, the erosion guard, and the counter electrode are configured to generate a plasma within the perforated flame holder when the voltage source applies the voltage between a wear surface and the counter electrode.

3. The combustion system of claim 1 , wherein the voltage is at least 10,000 volts.

4. The combustion system of claim 1 , wherein the erosion guard is a conductive refractory metal.

5. The combustion system of claim 1 , wherein the erosion guard is a metal screen.

6. The combustion system of claim 5 , wherein the metal screen is in contact with the perforated flame holder.

7. The combustion system of claim 1 , wherein the erosion guard includes a conductive material disposed on a surface of the perforated flame holder.

8. The combustion system of claim 1 , wherein the erosion guard includes a conductor disposed at least partially within the perforated flame holder.

9. The combustion system of claim 1 , wherein the erosion guard includes a stainless steel grid.

10. A combustion system, comprising:
a perforated flame holder, including:
an input face,
an output face on a side opposite from the input face, and
a plurality of apertures extending between the input face and the output face; and

a wear surface adjacent to the input face and configured to protect the perforated flame holder from erosion.

11. The combustion system of claim 10 , wherein the wear surface is integral with the perforated flame holder, and corresponds to the input face.

12. The combustion system of claim 10 , wherein the perforated flame holder and the wear surface are formed concurrently.

13. The combustion system of claim 11 , wherein the perforated flame holder and the wear surface are formed from respective compositions of material placed together in a mold.

14. The combustion system of claim 10 , wherein the perforated flame holder and the wear surface are formed in separate processes.

15. The combustion system of claim 14 , wherein the wear surface is formed over the input face of the perforated flame holder.

16. The combustion system of claim 14 , wherein the perforated flame holder and the wear surface are formed separately, and subsequently coupled together.

17. The combustion system of claim 10 , wherein the wear surface is in physical contact with the input face of the perforated flame holder.

18. The combustion system of claim 10 , wherein the wear surface is spaced apart from the input face of the perforated flame holder.

19. The combustion system of claim 10 , wherein the wear surface includes a metal.

20. The combustion system of claim 10 , further comprising a voltage source communicably coupled to the wear surface.

21. The combustion system of claim 20 , further comprising a counter electrode positioned adjacent to the output face and communicably coupled to the voltage source.

22. The combustion system of claim 21 , wherein the voltage source is configured to apply a voltage between the wear surface and the counter electrode.

23. The combustion system of claim 22 , wherein the voltage source, the wear surface, and the counter electrode are configured to generate a plasma within the perforated flame holder when the voltage source applies the voltage between the wear surface and the counter electrode.

24. The combustion system of claim 22 , wherein the voltage is a DC voltage.

25. The combustion system of claim 22 , wherein the voltage an AC voltage.

26. The combustion system of claim 22 , wherein the voltage is greater than 1000 volts.

27. The combustion system of claim 22 , wherein the voltage is at least 10,000 volts.

28. The combustion system of claim 22 , wherein the wear surface is a conductive refractory metal.

29. The combustion system of claim 22 , wherein the wear surface is a metal screen.

30. The combustion system of claim 29 , wherein the metal screen is in contact with the perforated flame holder.

31. The combustion system of claim 22 , wherein the wear surface includes a conductive material disposed on the input face of the perforated flame holder.

32. The combustion system of claim 22 , wherein the wear surface includes a conductor disposed at least partially within the perforated flame holder.

33. The combustion system of claim 22 , wherein the wear surface includes a stainless steel grid.

Assignees

• Clearsign Comb Corp

Inventors

• Karkow Douglas W
• Colannino Joseph
• Dansie James K
• Dumas Jesse
• Wiklof Christopher A

Classifications

• F23B2900/00006

  Means for applying electricity to flame, e.g. an electric field · CPC title

• F23D14/70

  Baffles or like flow-disturbing devices · CPC title

• F23G7/10

  of field or garden waste {or biomasses} · CPC title

• F23D1/00 Primary

  Burners for combustion of pulverulent fuel · CPC title

• F23D2201/30

  Wear protection · CPC title