Fuel processor
View Patent ↗An object of the present invention is to provide a fuel processor that can reduce reforming catalyst deterioration caused by thermal deformation of a structure. The fuel processor includes a reformer 8 that is fed with fuel gas 70 to refine hydrogen-rich reformed gas 73 by a reaction of a reforming catalyst 7 . A plurality of partition plates 20 for dividing the reforming catalyst 7 are provided in a space filled with the reforming catalyst 7 between an internal cylinder 18 and an external cylinder 19 . All the partition plates 20 are cantilevered from the external cylinder, preventing the partition plates 20 from coming into contact with each other in temperature variations. This can reduce deterioration such as crushing or powdering that is caused by a compressive stress of the reforming catalyst 7.
1. A fuel processor comprising:
a heater provided with an external cylinder outside an internal cylinder, the heater heating an interior of the internal cylinder; and
a reformer filled with a reforming catalyst between the internal cylinder and the external cylinder, the fuel processor producing hydrogen-rich reformed gas by passing fuel gas to be reformed through the reformer, by a reaction of the reforming catalyst,
wherein the reformer filled with the reforming catalyst is divided by a plurality of spaced partition plates in a space between the internal cylinder and the external cylinder in a longitudinal direction of the internal cylinder and the external cylinder, and outer edges of all the partition plates are cantilevered while being connected to the external cylinder.
2. The fuel processor according to claim 1 , wherein a clearance is formed between the partition plate and the internal cylinder.
3. The fuel processor according to claim 2 , wherein the clearance is larger than an amount of approach in thermal expansion of the internal cylinder and the external cylinder, the thermal expansion being caused by temperature variations during startup and shutdown of the fuel processor, and the clearance is smaller than a minimum grain size of the reforming catalyst.
4. The fuel processor according to claim 3 , wherein the clearance between the partition plate and the internal cylinder is larger near a high-temperature part of the internal cylinder than near a low-temperature part of the internal cylinder.
5. The fuel processor according to claim 1 , wherein the partition plate has a flange on a fixed part to the external cylinder, the flange being directed downstream in a flowing direction of the fuel gas to be reformed.
6. The fuel processor according to claim 4 , wherein the internal cylinder is tapered in side view so as to decrease in outside diameter toward the high-temperature part of the internal cylinder.
7. The fuel processor according to claim 5 , wherein the flange of the partition plate is entirely subjected to piecing welding onto the external cylinder.
8. The fuel processor according to claim 1 , wherein the reformer is filled with the reforming catalyst to an upper side of a bottom most one of the partition plates.