HYDROGEN GENERATOR, METHOD FOR OPERATING HYDROGEN GENERATOR, AND FUEL CELL SYSTEM

摘要

A hydrogen generator includes: a reformer (1) configured to generate a hydrogen-containing gas from a material gas; a combustor (2) configured to heat the reformer (1); a first gas supplying passage through which a gas discharged from the reformer (1) is supplied to the combustor (2) or a second gas supplying passage through which the material gas is supplied to the combustor (2); an ignitor (4) configured to carry out an ignition operation in the combustor (2); a pressure increasing device (17) configured to increase pressure of the material gas supplied to the reformer (1) or the combustor (2); a flow rate control valve (18) configured to control a flow rate of the material gas supplied to the reformer (1) or the combustor (2); and a controller (25), and in an ignition operation period of the ignitor (4), the controller (25) causes the pressure increasing device (17) to operate to supply the material gas to the combustor (2), and causes an opening degree of the flow rate control valve (18) to increase from an initial opening degree Us to a target opening degree Uc corresponding to a target material flow rate in the ignition operation period, the initial opening degree Us being smaller than the target opening degree Uc.