COMBUSTOR AND FUEL CELL SYSTEM

摘要

Combustor for a fuel cell capable of avoiding combustion instability and misfire while having a simple structure and capable of being reduced in size. The combustor includes a partially shielding member disposed in a gas channel for oxygen-containing gas passing. The partially shielding member partially shields the gas channel, thereby introducing part of the oxygen-containing gas passing the gas channel into a primary combustion zone formed in the inside area of the partially shielding member while allowing passing of residue of the oxygen-containing gas toward a secondary combustion zone on a downstream side in a gas passing direction relative to the primary combustion zone. A porous ceramic body is held in the secondary combustion zone and is of a ceramic foam having excellent heat resistance and gas permeability and includes an internal channel formed in a central portion thereof and an external channel formed on an outer peripheral side thereof.

主权项

1. A combustor comprising:
a gas channel for oxygen-containing gas passing; a regulating member disposed in the gas channel, the regulating member partially shielding the gas channel, thereby introducing part of the oxygen-containing gas passing the gas channel into an inside area of the regulating member, while allowing passage of residue of the oxygen-containing gas toward a downstream side of a gas passing direction; a primary combustion zone formed in the inside area of the regulating member for combusting combustion fuel supplied from outside in conjunction with the part of the oxygen-containing gas introduced into the primary combustion zone; and a secondary combustion zone formed in the gas channel on a downstream side of the gas passing direction relative to the primary combustion zone, wherein in the secondary combustion zone, a porous ceramic body having heat resistance and gas permeability is disposed in the gas channel, an internal channel for introducing combustion exhaust gas generated in the primary combustion zone from an upstream side toward a downstream side of the gas passing direction is provided in the vicinity of a central portion of the porous ceramic body, and an external channel for introducing the residue of the oxygen-containing gas which has not been introduced into the primary combustion zone from an upstream side toward a downstream side of the gas passing direction is provided in the vicinity of an outer peripheral portion of the porous ceramic body.