METHOD FOR A PERFORATED FLAME HOLDER WITH ADJUSTABLE FUEL NOZZLE

• US 20200132296A1
• Filed: 12/27/2019
• Published: 04/30/2020
• Est. Priority Date: 02/17/2015
• Status: Active Grant

• Current Assignee: ClearSign Technoloigies Corporation
• Original Assignee: ClearSign Technoloigies Corporation
• Inventors: KARKOW, DOUGLAS W., COLANNINO, JOSEPH, DANSIE, JAMES K., DUMAS, JESSE, KENDRICK, DONALD, WIKLOF, CHRISTOPHER A.
• Granted Patent: US 11,248,786 B2
• Time in Patent Office: Days
• CPC Class Codes: F23D 11/38 Nozzles; Cleaning devices therefor
• CPC Class Codes: F23D 11/443 heated by the main burner flame
• CPC Class Codes: F23D 14/145 combustion being stabilised at a screen or a perforated plate
• CPC Class Codes: F23D 14/26 with provision for a retention flame pilot flame igniters F23Q9/00
• CPC Class Codes: F23D 14/72 Safety devices, e.g. operative in case of failure of gas supply
• CPC Class Codes: F23D 9/00 Burners in which a stream of liquid fuel impinges intermittently on a hot surface
• CPC Class Codes: F23N 5/025 using electrical or electromechanical means F23N5/04 - F23N5/14 take precedence
• CPC Class Codes: F23N 5/245 using electrical or electromechanical means

Abstract

A method for a combustion system includes outputting fuel from an adjustable-position fuel nozzle onto a perforated flame holder, the fuel being directed for mixture with an oxidant en route to the perforated flame holder. A combustion reaction of the fuel and the oxidant is supported within the perforated flame holder. A position of the adjustable-position fuel nozzle may be changed relative to the flame holder. A first flow of fuel may be output when the adjustable position fuel nozzle is in an extended state, and a second flow of fuel may be output when the adjustable-position fuel nozzle is in a retracted state.

Claims

1. A method, comprising:

outputting fuel from an adjustable-position fuel nozzle onto a perforated flame holder, the fuel being directed for mixture with an oxidant en route to the perforated flame holder;

supporting a combustion reaction of the fuel and the oxidant within the perforated flame holder; and

adjusting a position of the adjustable-position fuel nozzle relative to the perforated flame holder.

2. The method of claim 1, further comprising:

supplying the fuel to the adjustable-position fuel nozzle; and

supplying the oxidant for the mixture with the fuel, wherein

at least the oxidant is supplied through an aperture in a floor of a combustion volume that holds the perforated flame holder.

3. The method of claim 2, further comprising preheating the perforated flame holder to a threshold temperature by:

moving the adjustable-position fuel nozzle relatively near the perforated flame holder; and

supporting a startup flame near the perforated flame holder.

4. The method of claim 2, wherein the supplying of the fuel to the adjustable-position fuel nozzle includes supplying the fuel from a flexible hose.

5. The method of claim 4, wherein adjusting a position of the adjustable-position fuel nozzle includes adjusting a position of the flexible hose.

6. The method of claim 1, wherein the fuel includes a fuel oil.

7. The method of claim 1, wherein the adjusting a position of the adjustable-position fuel nozzle includes:

extending the adjustable-position fuel nozzle toward the perforated flame holder to support a preheating flame near the perforated flame holder; and

retracting the adjustable-position fuel nozzle from the perforated flame holder after the perforated flame holder has been preheated.

8. The method of claim 7, further comprising:

outputting a second flow of the fuel from one or more secondary fuel nozzles after retracting the adjustable-position fuel nozzle.

9. A method, comprising:

outputting a first flow of fuel from an adjustable-position fuel nozzle;

preheating a perforated flame holder to a threshold temperature by supporting a preheating flame of the first flow of fuel with the adjustable-position fuel nozzle positioned near the perforated flame holder;

retracting the adjustable-position fuel nozzle from the perforated flame holder after the perforated flame holder has been preheated to the threshold temperature;

outputting a second flow of fuel from the adjustable-position fuel nozzle onto the perforated flame holder after retracting the adjustable-position fuel nozzle from the perforated flame holder; and

supporting a combustion reaction of the second flow of fuel within the perforated flame holder.

10. The method of claim 9, wherein retracting the adjustable-position fuel nozzle includes retracting a first portion of the adjustable-position fuel nozzle within a second portion of the adjustable-position fuel nozzle.

11. The method of claim 9, wherein retracting the adjustable-position fuel nozzle includes retracting a fuel and oxidant source assembly.