Fluidic control burner for pulverous feed

Patent metadata

Field	Value
Publication number	US-9657939-B2
Application number	US-201314390944-A
Country	US
Kind code	B2
Filing date	Apr 5, 2013
Priority date	Apr 5, 2012
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

A burner is provided for a pulverous feed material. The burner has a structure that integrates the burner with a reaction vessel, and has an opening that communicates with the interior of the reaction vessel. The burner also has a gas supply channel to supply reaction gas through the opening into the reaction vessel, and a feed supply for delivering pulverous material to the reaction vessel. The burner also has a fluidic control system having at least one port capable of directing a stream of fluid at an angle to the direction of flow of the reaction gas so as to modify the flow of the reaction gas. In addition, components are provided to modify the swirl intensity and turbulence intensity of the reaction gas independently of the exit velocity.

First claim

What is claimed is:

1. A burner for use on a flash smelting furnace having a roof and a reaction shaft, the burner comprising:
a burner structure that integrates with the roof of the furnace, having a nozzle that defines an opening therethrough to communicate with the reaction shaft of the furnace;
a gas supply channel to supply reaction gas to the reaction shaft through the nozzle;
a feed supply for delivering pulverous material;
an injector having a sleeve for delivering the pulverous material into the furnace, the injector extending through the nozzle, defining therewith an annular channel through which the reaction gas flows into the reaction shaft, with the reaction gas flow having at least one boundary layer within the annular channel;
a fluidic control system having at least one port to direct a stream of fluidic control regulating fluid at an angle to the direction of flow of the reaction gas through the annular channel;
wherein the stream of fluidic control regulating fluid is used to manipulate the at least one boundary layer and thereby adjust the cross-sectional area of the reaction gas flow within the annular channel so as to alter the exit velocity of the reaction gas flow into the reaction shaft.

2. The burner of claim 1 , further comprising:
a burner block that integrates with the roof of the furnace, the block having an opening therethrough to communicate with the reaction shaft of the furnace;
a wind box to supply reaction gas to the reaction shaft through a nozzle in the block opening, the wind box being mounted over the block;
the injector having a central lance within the sleeve to supply compressed air for dispersing the pulverous material in the reaction shaft, the injector mounting within the wind box so as to extend through the nozzle, defining therewith the annular channel through which reaction gas from the wind box flows into the reaction shaft.

3. The burner of claim 1 wherein the at least one port is connected to at least one conduit that carries the stream of fluid remote from the at least one port.

4. The burner of claim 1 wherein the at least one port can expel the stream of fluid into the reaction gas.

5. The burner of claim 1 wherein the at least one port communicates with a source of reduced pressure so as to create a partial vacuum that decreases the boundary layer and thereby decreases the exit velocity of the reaction gas into the reaction shaft.

6. A burner according to claim 1 further comprising at least one valve to adjust the stream of fluid.

7. The burner of claim 6 further comprising an actuator to control the at least one valve.

8. A burner according to claim 1 wherein the at least one port is a plurality of ports.

9. A burner according to claim 1 wherein the at least one port includes at least one port located on the sleeve.

10. The burner of claim 3 wherein the conduit passes within the wall of the sleeve.

11. A burner according to claim 1 wherein the at last one port includes at least one port located on the nozzle.

12. A burner according to claim 1 wherein the at last one port includes at least one port located within the wind box, above the annular channel.

13. A burner according to claim 1 wherein the stream of fluid manipulates the boundary layer to alter the exit velocity of the flow of the reaction gas into the reaction shaft.

14. A burner according to claim 1 further comprising a swirl inducing component having guide vanes revolved around the nozzle to induce swirling of the flow of the reaction gas independently of the port fluid streams.

15. A burner according to claim 14 wherein the swirl inducing component can be moved vertically by means internal or external to the wind box.

16. A burner according to claim 1 further comprising a turbulence generating component having a plurality of wings around the nozzle to induce turbulence of the flow of the reaction gas independently of the port fluid streams.

17. A burner according to claim 1 further comprising a turbulence generating component having a plurality of helical vanes around the nozzle to induce turbulence of the flow of the reaction gas independently of the port fluid streams.

18. The burner of claim 1 wherein the nozzle interior forms a cavity that is supplied with one or more fluid streams to supply one or more ports located within the nozzle.

19. A burner according to claim 1 wherein the stream of fluid includes a component that is directed at a tangential angle to the direction of flow of the reaction gas to induce a swirling motion to the flow of the reaction gas.

Assignees

• Hatch Ltd

Inventors

• Jastrzebski Maciej
• Mallory Alan
• Larrondo Piña Javier Eduardo
• Gonzales Thomas W
• Lamoureux Alexandre
• Marincic Ivan

Classifications

• F27D3/0033

  charging of particulate material · CPC title

• F23D1/00 Primary

  Burners for combustion of pulverulent fuel · CPC title

• F27D99/0033

  using burners · CPC title