Hydrogen production apparatus and fuel cell system

摘要

A hydrogen production apparatus includes a burner, a combustion tube provided so as to surround flame of the burner, a reforming unit provided so as to surround the tube, an exhaust gas flow path provided so as to pass through between the tube and the unit, fold back at the other side of the unit, and extend through outside of the unit on a predetermined side, a low temperature shift unit provided on one of inside and outside of an extending portion of the flow path that extends on the predetermined side so as to extend along the extending portion, and a preferential oxidation unit provided on the other of the inside and the outside of the extending portion so as to extend along the extending portion.

主权项

1. A hydrogen production apparatus for generating a reformed gas containing hydrogen using a raw fuel and steam, the hydrogen production apparatus comprising:
a burner; a combustion tube provided so as to surround flame of the burner and exhausting an exhaust gas of the burner from one side thereof; a reforming unit provided in a tubular shape so as to surround the combustion tube and subjecting the raw fuel and the steam to a reforming reaction to generate the reformed gas; an exhaust gas flow path provided in a tubular shape so as to pass through between the combustion tube and the reforming unit, fold back at the other side of the reforming unit, and extend through outside of the reforming unit on a predetermined side, the exhaust gas flow path passing the exhaust gas exhausted from the one side of the combustion tube; a low temperature shift unit provided in a tubular shape on one of inside and outside of an extending portion of the exhaust gas flow path that extends on the predetermined side so as to extend along the extending portion, the low temperature shift unit subjecting the reformed gas generated in the reforming unit to a shift reaction to reduce a carbon monoxide concentration in the reformed gas; and a preferential oxidation unit provided in a tubular shape on the other of the inside and the outside of the extending portion so as to extend along the extending portion, the preferential oxidation unit preferentially oxidizing the reformed gas subjected to the shift reaction in the low temperature shift unit to further reduce the carbon monoxide concentration.