| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heating furnace capable of saving energy while coming down in price. <P>SOLUTION: This heating furnace is provided with a burner 3 into which fuel and combustion air are supplied and burning the fuel in a furnace 2, and a oxygen containing gas supplying portion 4 that is concentration adjusting oxygen containing gas for adjusting oxygen concentration of the furnace 2 into the furnace 2. An exhaust path 5 discharging combustion exhaust gas in the furnace 2 is provided. Anti-combustion air heat exchanging portion Kf heat-exchanging the combustion air supplied to the burner 3 with the combustion exhaust gas discharged by the exhaust path 5 and preheating that, and a anti- concentration adjusting oxygen containing gas heat exchanging portion Kd heat-exchanging concentration adjusting oxygen containing gas supplied to the oxygen containing gas supplying portion 4 with the combustion exhaust gas discharged by the exhaust path 5 and preheating that, are provided. <P>COPYRIGHT: (C)2004,JPO |
