Patent ID: 8202499

Claim:
A small cylindrical reformer, comprising: a combustion reaction unit, which includes: a combustion part burning air and fuel supplied from an air/fuel inlet, a combustion gas distributor distributing the combustion gas generated in the combustion part, and a first combustion gas passage and a second combustion gas passage to guide the distributed combustion gas into an outlet to be discharged; and a fuel-converting catalytic reaction unit including: two reforming reaction parts preparing a reforming reaction reformate, each having a reforming catalyst to reform feed and water supplied from a feed/water inlet; and a water gas shift reaction part preparing a water gas shift reformate, between the two reforming reaction parts to decrease a concentration of carbon monoxide in the reforming reaction reformate, wherein the combustion reaction unit and the fuel-converting catalytic reaction unit are structured as six cylindrical pipes to realize optimal heat exchange efficiently, a route supplying the water gas shift reformate TO a preferential oxidation reactor and a route supplying feed and water into the reforming reaction parts from the feed/water inlet overlap each other outside the fuel-converting catalytic reaction unit so as to increase heat transfer efficiency, and the preferential oxidation reactor provided outside the fuel-converting catalytic reaction unit to decrease the concentration of carbon monoxide in the water gas shift reformate to a predetermined level or lower and increase heat transfer efficiency with an air/fuel preheating passage communicating with the air/fuel inlet.