High-temperature fuel cell system

Patent metadata

Field	Value
Publication number	US-2017338506-A1
Application number	US-201715590871-A
Country	US
Kind code	A1
Filing date	May 9, 2017
Priority date	May 19, 2016
Publication date	Nov 23, 2017
Grant date	—

Abstract

A high-temperature fuel cell system includes a reformer that reforms a hydrocarbon-based raw fuel to generate a reformed gas containing hydrogen, a fuel cell that generates power by using the reformed gas and an oxidant gas, and a burner that heats the reformer. The burner includes an anode-off-gas gathering portion that has an anode-off-gas ejection hole and at which an anode off-gas discharged from an anode of the fuel cell gathers. The anode-off-gas gathering portion surrounds a first cathode-off-gas passing area through which a cathode off-gas discharged from a cathode of the fuel cell passes. The anode-off-gas ejection hole is formed such that the anode off-gas ejected upward from the anode-off-gas ejection hole approaches the cathode off-gas passing upward through the first cathode-off-gas passing area. The anode off-gas ejected from the anode-off-gas ejection hole and the cathode off-gas that has passed through the first cathode-off-gas passing area are burned.

First claim

What is claimed is:

1 . A high-temperature fuel cell system, comprising:
a reformer that reforms a hydrocarbon-based raw fuel to generate a reformed gas containing hydrogen; a fuel cell that generates power by using the reformed gas and an oxidant gas; and a burner that heats the reformer, wherein the burner includes an anode-off-gas gathering portion that has an anode-off-gas ejection hole and at which an anode off-gas discharged from an anode of the fuel cell gathers, wherein the anode-off-gas gathering portion is formed so as to surround a first cathode-off-gas passing area through which a cathode off-gas discharged from a cathode of the fuel cell passes, wherein the anode-off-gas ejection hole is formed such that the anode off-gas ejected upward from the anode-off-gas ejection hole approaches the cathode off-gas passing upward through the first cathode-off-gas passing area, and wherein the anode off-gas ejected from the anode-off-gas ejection hole and the cathode off-gas that has passed through the first cathode-off-gas passing area are burned.

2 . The high-temperature fuel cell system according to claim 1 ,
wherein the anode-off-gas gathering portion is formed of an annular body having a hollow structure, and the first cathode-off-gas passing area is formed of a space in the annular body.

3 . The high-temperature fuel cell system according to claim 1 ,
wherein the anode-off-gas gathering portion has a tapered surface sloping downward toward the first cathode-off-gas passing area, and the anode-off-gas ejection hole extends from the tapered surface.

4 . The high-temperature fuel cell system according to claim 1 , further comprising:
a reformed-gas supply path along which the reformed gas flows, wherein the reformer is disposed above the burner, and wherein the reformed-gas supply path extends from the reformer to the fuel cell through the first cathode-off-gas passing area.

5 . The high-temperature fuel cell system according to claim 1 ,
wherein some of the cathode off-gas passes upward through a second cathode-off-gas passing area outside the anode-off-gas gathering portion, and the anode off-gas ejected from the anode-off-gas ejection hole and the cathode off-gas that has passed through the second cathode-off-gas passing area are burned.

6 . The high-temperature fuel cell system according to claim 1 , further comprising:
an air register or a baffle plate that is disposed so as to cover the first cathode-off-gas passing area from above.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kakuwa Takashi
• Onuma Shigenori

Classifications

• B01J8/008

  Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction (B01J8/0285, B01J8/067, B01J8/087, B01J8/1836 take precedence) · CPC title

• B01J8/0278

  Feeding reactive fluids (for solid material B01J8/0015) · CPC title

• B01J2208/00504

  by means of a burner · CPC title

• B01J8/0285

  Heating or cooling the reactor (for tubular reactors in furnaces B01J8/062) · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title