Hydrogen generator and fuel cell system

摘要

A hydrogen generator (100) includes: a hydrogen generating unit (1) configured to generate a hydrogen-containing gas by using a raw material gas; a hydro-desulfurizer (7) configured to remove a sulfur compound in the raw material gas supplied to the hydrogen generating unit (1); a first gas channel (5) through which the raw material gas supplied through the hydro-desulfurizer (7) to the hydrogen generating unit (1) flows; a recycle channel (10) through which the hydrogen-containing gas from the hydrogen generating unit (1) is supplied to the raw material gas in the first gas channel (5) located upstream of the hydro-desulfurizer (7); a raw material gas supply unit (6) disposed between the hydro-desulfurizer (7) and a meeting point where the first gas channel (5) and the recycle channel (10) meet; and a first on-off valve (8) disposed between the raw material gas supply unit (6) and the hydro-desulfurizer (7) to close when the hydrogen generator (100) stops.

主权项

1. A hydrogen generation apparatus comprising:
a hydrogen generator configured to generate a hydrogen-containing gas by using a raw material gas; a hydro-desulfurizer configured to remove a sulfur compound in the raw material gas supplied to the hydrogen generator; a first gas channel through which the raw material gas supplied through the hydro-desulfurizer to the hydrogen generator flows; a recycle channel through which the hydrogen-containing gas from the hydrogen generator is supplied to the raw material gas flowing in the first gas channel, the recycle channel being connected to a meeting point of the first gas channel located upstream of the hydro-desulfurizer; a raw material gas supply disposed between the hydro-desulfurizer and the meeting point; a first on-off valve disposed on the first gas channel extending between the raw material gas supply and the hydro-desulfurizer; a normal temperature desulfurizer configured to remove the sulfur compound in the raw material gas supplied to the hydrogen generator; a second gas channel branching at a point located upstream of the hydro-desulfurizer, pass through the normal temperature desulfurizer, and meeting the first gas channel located upstream of the meeting point where the first gas channel and the recycle channel meet; a second on-off valve disposed on the second gas channel; and a third on-off valve disposed on the first gas channel extending between a branching point where the second gas channel branches from the first gas channel and a meeting point where the second gas channel meets the first gas channel.