System for gasification fuel injection

Patent metadata

Field	Value
Publication number	US-9228744-B2
Application number	US-201213347657-A
Country	US
Kind code	B2
Filing date	Jan 10, 2012
Priority date	Jan 10, 2012
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

A system includes a gasification fuel injector. The gasification fuel injector includes a mixing device configured to mix together at least two of a solid stream, a liquid stream, or a gaseous stream, or a combination thereof, to generate a mixture. The mixing device is disposed upstream of a tip portion of the gasification fuel injector, and the mixture is discharged from the tip portion.

First claim

The invention claimed is:

1. A system, comprising:
a gasification fuel injector, comprising:
a mixing device comprising a first inlet configured to receive a first substance, a second inlet configured to receive a second substance, and a third inlet configured to receive a third substance, wherein the first, second, and third substances are different from one another, wherein the first, second, and third inlets are independently coupled to a common mixing chamber of the mixing device, wherein the mixing device is configured to mix together the first, second, and third substances to generate a mixture including a gasification feedstock and excluding an oxidizer;
a mixture passage coupled to the mixing device, wherein the mixture passage comprises a first outlet configured to inject the mixture in a downstream direction; and
an oxidizer passage comprising a second outlet configured to inject the oxidizer in the downstream direction, wherein the oxidizer passage is separate from the mixture passage, and the first and second outlets are downstream from the mixing device.

2. The system of claim 1 , wherein the mixing device is disposed in the gasification fuel injector.

3. The system of claim 1 , wherein the mixing device is coupled to an upstream portion of the gasification fuel injector.

4. The system of claim 1 , wherein the mixing device comprises a first flange coupled to a second flange of the mixture passage.

5. The system of claim 1 , wherein the mixing device comprises an annular wall disposed about the common mixing chamber, and the first, second, and third inlets are oriented crosswise to an axis of the mixing device.

6. The system of claim 1 , wherein at least one of the first, second, or third inlets is coupled to the common mixing chamber tangentially to induce a swirling.

7. The system of claim 1 , wherein the common mixing chamber comprises a diameter larger than the first, second, and third inlets.

8. The system of claim 1 , wherein the common mixing chamber comprises a perforated mixing plate disposed between the first and second inlets.

9. The system of claim 8 , wherein the perforated mixing plate is parallel to an axial axis of the gasification fuel injector.

10. The system of claim 8 , wherein the perforated mixing plate is crosswise to an axial axis of the gasification fuel injector.

11. The system of claim 8 , wherein the perforated mixing plate comprises a plurality of holes oriented at an angle to induce a swirling flow.

12. The system of claim 1 , comprising a first nozzle having the first inlet, wherein the first nozzle protrudes a distance into the common mixing chamber.

13. The system of claim 12 , wherein the second inlet is coupled to the common mixing chamber upstream from a downstream end of the first nozzle.

14. The system of claim 13 , wherein the third inlet is coupled to the common mixing chamber upstream from the downstream end of the first nozzle.

15. A system, comprising:
a fuel injector, comprising:
a mixing device comprising a first inlet configured to receive a first substance, a second inlet configured to receive a second substance, and a third inlet configured to receive a third substance, wherein the first, second, and third substances are different from one another, wherein the first, second, and third inlets are independently coupled to a common mixing chamber of the mixing device, wherein the mixing device is configured to mix together the first, second, and third substances in the common mixing chamber to generate a mixture including a feedstock and excluding an oxidizer;
a mixture passage coupled to the mixing device, wherein the mixture passage comprises a first outlet configured to inject the mixture in a downstream direction; and
an oxidizer passage comprising a second outlet configured to inject the oxidizer in the downstream direction, wherein the oxidizer passage is separate from the mixture passage, and the second outlet is downstream from the mixing device.

16. The system of claim 15 , wherein each of the first, second, and third inlets expand into the common mixing chamber.

17. The system of claim 15 , comprising a controller configured to control a flow of the first, second, and third substances and the oxidizer, wherein the first, second, and third substances comprise at least one of the feedstock, a moderator, or an additive.

18. A system, comprising:
a mixing device having first and second inlets that expand into a mixing chamber, wherein the mixing chamber expands in a downstream direction, the first inlet is configured to receive a first substance, the second inlet is configured to receive a second substance different from the first substance, the mixing chamber is configured to mix together the first and second substances to generate a mixture including a feedstock and excluding an oxidizer; and
a fuel injector coupled to the mixing device, wherein the fuel injector comprises:
a tip portion;
a mixture passage comprising a first outlet configured to inject the mixture through the tip portion; and
an oxidizer passage comprising a second outlet configured to inject the oxidizer through the tip portion, wherein the oxidizer passage is separate from the mixture passage, and the second outlet is downstream from the mixing device.

19. The system of claim 18 , comprising a controller configured to control flows of the first substance, the second substance, and the oxidizer, wherein the first and second substances comprise at least one of the feedstock, a moderator, or an additive.

20. The system of claim 18 , wherein the mixing device has a third inlet that expands into the mixing chamber, wherein the first, second, and third inlets are independently coupled to the mixing chamber.

21. The system of claim 5 , wherein the common mixing chamber comprises a first portion with a first cross-sectional area and a second portion with a second cross-sectional area smaller than the first cross-sectional area, the first inlet is coupled to the first portion, and the second inlet is coupled to the second portion.

22. The system of claim 1 , wherein the gasification fuel injector is configured to couple to an exterior of a gasifier, and the mixing device is configured to be disposed outside of the exterior of the gasifier.

23. The system of claim 22 , comprising the gasifier having the gasification fuel injector coupled to the exterior of the gasifier.

24. The system of claim 1 , comprising a first nozzle having the first inlet, a second nozzle having the second inlet, and a third nozzle having the third inlet, wherein the first, second, and third nozzles are oriented in a converging relationship.

25. The system of claim 1 , wherein the second inlet is coupled to the common mixing chamber downstream from the first inlet, and the third inlet is coupled to common the mixing chamber downstream from the first and second inlets.

26. The system of claim 1 , wherein the mixture passage and the oxidizer passage are concentric with one another.

27. The system of claim 1 , wherein the mixture passage is disposed circumferentially around the oxidizer passage.

28. The system of claim 1 , wherein the oxidizer passage is disposed circumferentially around the mixture passage.

29. The system of claim 1 , wherein the first and second outlets are disposed in a tip portion of the gasification fuel injector

Assignees

• Ergut Ali
• Talya Shashishekara Sitharamarao
• Chandrashekar Natesh
• Harned Monty Lee
• Oppenheim Judith Pauline
• Steinhaus Benjamin Campbell
• Gen Electric

Inventors

• Ergut Ali
• Talya Shashishekara Sitharamarao
• Chandrashekar Natesh
• Harned Monty Lee
• Oppenheim Judith Pauline
• Steinhaus Benjamin Campbell

Classifications

• C10J3/506

  for entrained flow gasifiers · CPC title

• Y02E20/18

  Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS] · CPC title

• Y02E20/16

  Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] · CPC title

• F23D14/22 Primary

  with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other · CPC title

• F23D17/00

  Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel · CPC title