Fuel cell combustor and fuel cell module

Patent metadata

Field	Value
Publication number	US-9816706-B2
Application number	US-201514973948-A
Country	US
Kind code	B2
Filing date	Dec 18, 2015
Priority date	Dec 22, 2014
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A raw fuel inlet pipe, an air inlet pipe, and a combustion gas exhaust pipe are provided for a casing of a start-up combustor. A raw fuel supply chamber connected to the raw fuel inlet pipe and an air supply chamber connected to the air inlet pipe form double layer structure. A chamber having a partition wall is provided for the raw fuel supply chamber, and a slit connected to the air supply chamber is formed in the partition wall. A plurality of raw fuel through holes are formed on a side surface of the partition wall with which the slit is formed.

First claim

What is claimed is:

1. A fuel cell combustor configured to supply a combustion gas produced by mixing a fuel gas and an oxygen-containing gas, to a fuel cell stack including a plurality of stacked fuel cells configured to generate electrical energy by electrochemical reactions of the fuel gas and the oxygen-containing gas,
the combustor comprising a casing,
the casing having:
a fuel gas inlet configured to flow the fuel gas into the casing through the fuel gas inlet;
an oxygen-containing gas inlet configured to flow the oxygen-containing gas into the casing through the oxygen-containing gas inlet;
a combustion gas outlet configured to discharge the combustion gas from the casing through the combustion gas outlet;
a fuel gas supply unit connected to the fuel gas inlet and configured to fill the fuel gas in the fuel gas supply unit; and
an oxygen-containing gas supply unit connected to the oxygen-containing gas inlet and configured to fill the oxygen-containing gas in the oxygen-containing gas supply unit, the fuel gas supply unit and the oxygen-containing gas supply unit forming a double layer structure,
wherein the fuel gas supply unit is a chamber having a partition wall;
a slit connected to the oxygen-containing gas supply unit is formed in the partition wall, wherein the slit includes a first straight slit, a second straight slit, and at least one turning segment;
a plurality of fuel gas through holes are formed oppositely on each side surface of the partition wall with which the slit is formed, the fuel gas through holes are configured to pass the fuel gas from the chamber to the slit, and the fuel gas through holes are arranged in a direction in which the slit extends, wherein the fuel pas through holes are provided oppositely on each side surface of the partition plate in the turning segment, the first straight slit, and the second straight slit; and
the oxygen-containing gas flows through the oxygen-containing gas inlet, the oxygen-containing gas supply unit, and the slit, and the oxygen-containing gas is mixed with the fuel gas.

2. A fuel cell module comprising:
a fuel cell stack including a plurality of stacked fuel cells configured to generate electrical energy by electrochemical reactions of a fuel gas and an oxygen-containing gas; and
a combustor configured to supply a combustion gas produced by mixing the fuel gas and the oxygen-containing gas, to the fuel cell stack,
the combustor having a casing,
the casing having:
a fuel gas inlet configured to flow the fuel gas into the casing through the fuel gas inlet;
an oxygen-containing gas inlet configured to flow the oxygen-containing gas into the casing through the oxygen-containing gas inlet;
a combustion gas outlet configured to discharge the combustion gas from the casing through the combustion gas outlet;
a fuel gas supply unit connected to the fuel gas inlet and configured to fill the fuel gas in the fuel gas supply unit; and
an oxygen-containing gas supply unit connected to the oxygen-containing gas inlet and configured to fill the oxygen-containing gas in the oxygen-containing gas supply unit, the fuel gas supply unit and the oxygen-containing gas supply unit forming a double layer structure,
wherein the fuel gas supply unit is a chamber having a partition wall;
a slit connected to the oxygen-containing gas supply unit is formed in the partition wall, wherein the slit includes a first straight slit, a second straight slit, and at least one turning segment;
a plurality of fuel gas through holes are formed oppositely on each side surface of the partition wall with which the slit is formed, the fuel gas through holes are configured to pass the fuel gas from the chamber to the slit, and the fuel gas through holes are arranged in a direction in which the slit extends, wherein the fuel gas through holes are provided oppositely on each side surface of the partition plate in the turning segment, the first straight slit, and the second straight slit; and
the oxygen-containing gas flows through the oxygen-containing gas inlet, the oxygen-containing gas supply unit, and the slit, and the oxygen-containing gas is mixed with the fuel gas.

3. A fuel cell module comprising:
a fuel cell stack including a plurality of stacked fuel cells configured to generate electrical energy by electrochemical reactions of a fuel gas and an oxygen-containing gas; and
a combustor configured to supply a combustion gas produced by mixing the fuel gas and the oxygen-containing gas, to the fuel cell stack,
the combustor having a casing,
the casing having:
a fuel gas inlet configured to flow the fuel gas into the casing through the fuel pas inlet;
an oxygen-containing gas inlet configured to flow the oxygen-containing gas into the casing through the oxygen-containing gas inlet;
a combustion gas outlet configured to discharge the combustion gas from the casing through the combustion gas outlet;
a fuel gas supply unit connected to the fuel gas inlet and configured to fill the fuel gas in the fuel gas supply unit; and
an oxygen-containing gas supply unit connected to the oxygen-containing gas inlet and configured to fill the oxygen-containing gas in the oxygen-containing gas supply unit, the fuel gas supply unit and the oxygen-containing gas supply unit forming a double layer structure,
wherein the fuel gas supply unit is a chamber having a partition wall;
a slit connected to the oxygen-containing gas supply unit is formed in the partition wall;
a plurality of fuel gas through holes are formed on a side surface of the partition wall with which the slit is formed, the fuel gas through holes are configured to pass the fuel gas from the chamber to the slit, and the fuel gas through holes are arranged in a direction in which the slit extends; and
the oxygen-containing gas flows through the oxygen-containing gas inlet, the oxygen-containing gas supply unit, and the slit, and the oxygen-containing gas is mixed with the fuel gas,
wherein the fuel gas supply unit includes a casing member provided in the casing;
a gap is formed between the casing member and an inner wall surface of the casing; and
a holder plate is fixed to one surface of the casing member, and is configured to hold the casing member by another inner wall surface of the casing which is different from the inner wall surface.

4. The fuel cell module according to claim 3 , wherein the fuel gas supply unit has a central straight slit inside the slit, the central straight slit extends straight in parallel with a straight segment of the slit, and the central straight slit is spaced from the slit.

5. The fuel cell module according to claim 4 , wherein a rectifier plate is provided at the central straight slit, and the rectifier plate extends along the central straight slit; and
the rectifier plate has a Y-shape in a front view as viewed from a direction in which the central straight slit extends.

6. The fuel cell module according to claim 5 , wherein the rectifier plate is provided at the central straight slit to divide the central straight slit into a first central straight slit and a second central straight slit; and
a width of a gap between the casing member and the inner wall surface of the casing, a width of the slit, a width of the first central straight slit, and a width of the second central straight slit have the same size.

7. The fuel cell module according to claim 6 , wherein the gap, the straight segment of the slit, the first central straight slit, and the second central straight slit extend in parallel with one another.

Assignees

• Honda Motor Co Ltd

Inventors

• Takada Hideaki
• Ogawa Tetsuya
• Ushijima Teruyuki
• Kiyohiro Yukihiko

Classifications

• F23D99/002

  Burners specially adapted for specific applications · CPC title

• Y02E60/50

  Fuel cells · CPC title

• Y02E60/525

  Cross-Sectional Technologies · mapped topic

• F23D14/02 Primary

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

• Y02T90/32

  Cross-Sectional Technologies · mapped topic