| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel battery system that can effectively use exhaust gas from a fuel electrode of a fuel battery by enhancing the utilization efficiency of a carbon dioxide absorption material.SOLUTION: Carbon dioxide absorbing parts 22, 24 for absorbing or releasing carbon dioxide by a carbon dioxide absorbing material are disposed so as to be heat-exchangeable with each other. A first switching unit 40 makes a recovery gas pipe 36 intercommunicate with one of the carbon dioxide absorbing parts 22, 24, said recovery gas pipe being a pipe through which exhaust gas exhausted from a fuel electrode of an SOFC stack 16, pressurized in a blower 18 and reduced in temperature in a second heat-exchanger passes. A second switching unit 42 switches the carbon dioxide absorbing units 22, 24 so that the one of the carbon dioxide absorbing units 22, 24 which intercommunicates with the recovery gas pipe 36 intercommunicate with a recovered gas supply pipe 46, and the other intercommunicates with a carbon dioxide exhaust pipe 46 in which a pressure-reduced pup 26 is provided in the middle thereof. Through the heat-exchangeability between the carbon dioxide absorbing parts 22, 24, absorption of carbon dioxide from exhaust gas is stably performed on one side while discharge of carbon dioxide is stably performed at the other side. Exhaust gas whose carbon dioxide concentration is reduced is supplied to the SOFC stack 16 for reuse.SELECTED DRAWING: Figure 1 |
