Hydrogen gas burner structure and hydrogen gas burner device including the same

Patent metadata

Field	Value
Publication number	US-2018156451-A1
Application number	US-201715824599-A
Country	US
Kind code	A1
Filing date	Nov 28, 2017
Priority date	Dec 7, 2016
Publication date	Jun 7, 2018
Grant date	—

Abstract

A hydrogen gas burner structure includes a first cylinder tube, a second cylinder tube, a third cylinder tube, and an ignition device. An inside of the first cylinder tube is configured such that hydrogen gas flows. A space between the first cylinder tube and the second cylinder tube is configured such that a first combustion-supporting gas containing oxygen gas flows. A space between the second cylinder tube and the third cylinder tube is configured such that a second combustion-supporting gas containing oxygen gas flows. The ignition device is configured to ignite mixed gas. The tip of the first cylinder tube is located upstream of the tips of the second and third cylinder tubes in a gas flow direction in which the hydrogen gas and the first combustion-supporting gas and the second combustion-supporting gas flow.

First claim

What is claimed is:

1 . A hydrogen gas burner structure comprising:
a first cylinder tube of which a tip is open, an inside of the first cylinder tube being configured such that hydrogen gas flows toward the tip of the first cylinder tube; a second cylinder tube disposed outside the first cylinder tube concentrically with the first cylinder tube, a space between the first cylinder tube and the second cylinder tube being configured such that a first combustion-supporting gas containing oxygen gas, for primary combustion of the hydrogen gas, flows toward a tip of the second cylinder tube; a third cylinder tube disposed outside the second cylinder tube concentrically with the first cylinder tube and the second cylinder tube, a space between the second cylinder tube and the third cylinder tube being configured such that a second combustion-supporting gas containing oxygen gas, for secondary combustion of the hydrogen gas, flows toward a tip of the third cylinder tube; and an ignition device disposed inside the second cylinder tube, the ignition device being configured to ignite mixed gas obtained by mixing the hydrogen gas and the first combustion-supporting gas with each other, wherein the tip of the first cylinder tube is located upstream of the tips of the second and third cylinder tubes in a gas flow direction in which the hydrogen gas and the first combustion-supporting gas and the second combustion-supporting gas flow.

2 . The hydrogen gas burner structure according to claim 1 , wherein the tip of the third cylinder tube is located upstream of the tip of the second cylinder tube in the gas flow direction.

3 . The hydrogen gas burner structure according to claim 1 , wherein:
the first cylinder tube includes a through-hole, which allows an inside and an outside of a tube wall of the first cylinder tube to communicate with each other, in the tube wall in a vicinity of the tip of the first cylinder tube; and the ignition device is disposed downstream of the through-hole in the gas flow direction.

4 . A hydrogen gas burner device comprising:
a first cylinder tube of which a tip is open, an inside of the first cylinder tube being configured such that hydrogen gas flows toward the tip of the first cylinder tube; a second cylinder tube disposed outside the first cylinder tube concentrically with the first cylinder tube, a space between the first cylinder tube and the second cylinder tube being configured such that a first combustion-supporting gas containing oxygen gas, for primary combustion of the hydrogen gas, flows toward a tip of the second cylinder tube; a third cylinder tube disposed outside the second cylinder tube concentrically with the first cylinder tube and the second cylinder tube, a space between the second cylinder tube and the third cylinder tube being configured such that a second combustion-supporting gas containing oxygen gas, for secondary combustion of the hydrogen gas, flows toward a tip of the third cylinder tube; and an ignition device disposed inside the second cylinder tube, the ignition device being configured to ignite mixed gas obtained by mixing the hydrogen gas and the first combustion-supporting gas with each other, a control device configured to control flow rates of the hydrogen gas and at least the first combustion-supporting gas, wherein the tip of the first cylinder tube is located upstream of the tips of the second and third cylinder tubes in a gas flow direction in which the hydrogen gas and the first combustion-supporting gas and the second combustion-supporting gas flow, the first combustion-supporting gas and the second combustion-supporting gas are the same combustion-supporting gas, and the control device is configured to control the flow rate of the first combustion-supporting gas such that the flow rate of the first combustion-supporting gas is lower than a flow rate at which the hydrogen gas is completely combusted and is lower than a flow rate of the second combustion-supporting gas.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hirata Koichi
• Sakuma Daisuke
• Mimura Kenshiro

Classifications

• F23C2900/06041

  Staged supply of oxidant · CPC title

• F23D14/22 Primary

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

• F23D14/58

  characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration · CPC title

• F23D14/46

  Details · CPC title

• F23D14/02 Primary

  Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone · CPC title