Fluid distribution and mixing grid for mixing gases

Patent metadata

Field	Value
Publication number	US-9518734-B2
Application number	US-201313751399-A
Country	US
Kind code	B2
Filing date	Jan 28, 2013
Priority date	Jan 28, 2013
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A grid for distributing and mixing fluids in a duct includes a plurality of lances arranged in a first plane and configured to be positioned transverse to a direction of a first fluid flowing outside of the lances and within a predetermined flow area. Each of the plurality of lances has at least one first inlet and a plurality of outlet nozzles. One or more of the outlet nozzles is directed generally in the flow direction of the first fluid outside of the lances, and is configured to discharge a second fluid therefrom.

First claim

What is claimed is:

1. An oxy-combustion system comprising:
a furnace defining an interior combustion area;
an oxygen supply system;
a fuel supply system defining a primary flue gas inlet and a fuel outlet;
at least one flue gas processing system positioned downstream of and in communication with the furnace;
a primary gas system defining a primary flue gas outlet, the primary gas system being in communication with the at least one flue gas processing system and the primary flue gas outlet being in fluid communication with the fuel inlet;
a secondary gas system defining a secondary flue gas outlet, the secondary gas system being in communication with the at least one flue gas processing system and the secondary flue gas outlet being in communication with the furnace;
at least one oxygen discharge line being in communication with at least one of the primary gas system and the secondary gas system; and
a grid positioned in a duct of at least one of the primary gas system and the secondary gas system, the grid comprising:
a plurality of lances arranged in a first plane and positioned transverse to a flow direction of a flue gas outside of the lances and within a predetermined flow area;
each of the plurality of lances having at least one oxygen inlet and a plurality of outlet nozzles, the oxygen inlet being in communication with the oxygen supply system; and
at least one of the outlet nozzles being directed generally in the flow direction of the of flue gas outside of the lances, and configured to discharge oxygen therefrom;
wherein the plurality of lances includes a set of upper lances extending downwardly and a set of lower lances extending upwardly in the duct; and
wherein each of the upper lances vertically align with a respective lower lance, and further comprising at least one sleeve moveable positioned between at least one of the upper lance and lower lance.

2. The oxy-combustion system of claim 1 , wherein the primary gas system is in communication with at least one of the furnace, an oxidant preheater, a particulate removal system, a sulfur removal system, a flue gas cooler and a carbon dioxide removal system.

3. The oxy-combustion system of claim 1 , wherein the secondary gas system is in communication with at least one of an oxidant preheater, a particulate removal system, a sulfur removal system, a flue gas cooler and a carbon dioxide removal system.

4. The oxy-combustion system of claim 1 , further comprising an oxidant preheater in communication with the primary gas system and the secondary gas system, wherein the grid is positioned at least one of upstream of the oxidant preheater and downstream of the oxidant preheater.

5. The oxy-combustion system of claim 1 , further comprising an oxidant preheater in communication with the primary gas system and the secondary gas system, wherein the grid is positioned downstream of the oxidant preheater.

6. The oxy-combustion system of claim 1 , wherein the first plane is positioned substantially perpendicular to the direction of the flue gas flowing outside of the lances.

7. The oxy-combustion system of claim 1 , wherein the plurality of lances extend vertically in the duct.

8. The oxy-combustion system of claim 1 , wherein the plurality of lances extend horizontally in the duct.

9. The oxy-combustion system of claim 1 , further comprising at least one flow control device in communication with at least one of the plurality of lances.

10. The oxy-combustion system of claim 9 , further comprising a control system in communication with the at least one control device for controlling flow of the oxygen into the at least one of the plurality of lances.

11. The oxy-combustion system of claim 10 , wherein the at least one control devices is a valve.

12. The oxy-combustion system of claim 1 wherein at least one of the plurality of lances has at least one of the nozzles positioned at an angle of about 30 to about 60 degrees, relative to the direction of the flue gas flowing outside of the lances.

13. The oxy-combustion system of claim 1 , wherein at least one of the plurality of lances has at least one of the nozzles positioned at an angle of about 12.5 to about 32.5 degrees, relative to the direction of the flue gas flowing outside of the lances.

Assignees

• Alstom Technology Ltd
• General Electric Technology Gmbh

Inventors

• Cohen Mitchell B
• Chen Yen-Ming
• Levasseur Armand A

Classifications

• F23J15/02 Primary

  of purifiers, e.g. for removing noxious material (traps for solid residues F23J3/04) · CPC title

• F23C9/00

  Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber (fluidised bed combustion apparatus with means for recirculation of particles entrained from the bed F23C10/02; fluidised bed combustion apparatus with devices for removal and partial reintroduction of material from the bed F23C10/26) · CPC title

• F23L2900/07001

  Injecting synthetic air, i.e. a combustion supporting mixture made of pure oxygen and an inert gas, e.g. nitrogen or recycled fumes · CPC title

• F23L7/007

  Supplying oxygen or oxygen-enriched air · CPC title

• F23J15/022

  for removing solid particulate material from the gasflow · CPC title