Hydrogen generator, fuel cell system including hydrogen generator, and method for operating hydrogen generator

摘要

A hydrogen generator of the present invention includes: a raw material supplying device (4) configured to supply a raw material; a water supplying device (3) configured to supply water; an evaporator (23) configured to evaporate the water supplied from the water supplying device (3) to generate steam; a reformer (20) having a reforming catalyst which generates a hydrogen-containing gas by a reforming reaction using the raw material and the steam; a valve (12) disposed on a gas passage to cause the reformer (20) to be communicated with an atmosphere and block the reformer (20) from the atmosphere, the gas passage being located downstream of the reformer (20); and a controller (11) configured to stop supplying the water from the water supplying device (3), then continue to supply the raw material from the raw material supplying device (4) with the valve (12) open, and stop supplying the raw material from the raw material supplying device (4) and close the valve (12) before an inside of the reformer (20) is purged with the raw material.

主权项

1. A hydrogen generator comprising:
a raw material supplying device configured to supply a raw material; a water supplying device configured to supply water; an evaporator configured to evaporate the water supplied from the water supplying device to generate steam; a reformer having a reforming catalyst which generates a hydrogen-containing gas by a reforming reaction using the raw material and the steam; a heater configured to supply reaction heat necessary for the reforming reaction in the reformer; and a controller including a memory storing a program, wherein the program, when executed by the controller, causes the controller to:
stop supplying the water from the water supplying device and cause the heater to continuously heat the reformer even after the supply of the water from the water supplying device is stopped,then continue supplying the raw material from the raw material supplying device, andthen, stop supplying the raw material from the raw material supplying device and stop causing the heater to heat the reformer before the steam in the reformer is purged with the supplied raw material.