| 摘要 |
PURPOSE:To provide a titled furnace which is compact and has good heat transmission efficiency by constituting said furnace wherein a gaseous mixture of oxygen and fuel is flowed in the annular space between an oxidation catalyst layer provided on the inside wall of a tubular sleeve body covering a reaction tube and the outside wall of the reaction tube and is burned to heat uniformly the reactin tube. CONSTITUTION:The respective reaction tubes 5 to be suspended in a lower chamber 4 which is a combustion heating chamber are covered over roughly the entire length thereof by tubular sleeve bodies 6 each provided with an oxidation layer of Pt, etc. on the inside wall in such a way that an annular space 7 exists between both, in a steam reforming furnace 1 which passes the gaseous raw material introduced through a feed pipe 13 into an upper chamber 3 through the catalyst layers 14 in the plural tubes 5 and draws out the gas formed by the reaction from a conduit 17 through an inside tube 15 and a header 16. The fuel and oxygen-contg. gas introduced from feed tubes 10, 11 into the chamber 4 are begun to be burned near nozzles 10', 11', and ascend in the space 7 where the combustion reaction s effected by an oxidation catalyst and the outside walls of the tubes 5 are uniformly and efficiently heated. The waste gas is then discharged from an outlet pipe 12. |
