| 摘要 |
PURPOSE:To efficiently heat a material to be treated and to prevent a danger of explosion in a furnace by completing a combustion reaction in a fluidized bed, by providing a fuel feed tube and an air feed tube in the fluidized bed, and by feeding the air being enriched with oxygen into the fluidized bed. CONSTITUTION:An oxygen enriched air feeding means 22 is connected to the midway of a pipe line 20 by the intermediary of a piping 21. An oxygen selecting and permeating film 23 is provided to the oxygen enriched air feeding means 22. Through the film, the air enriched with oxygen is fed into the fluidized bed 12 in a furnace body 10. With such as arrangement, fuel gas can be burnt in good condition and combustion reaction can be completed in the fluidized bed 12, since the concentration of oxygen in the air comes to be comparatively high even if mixture and dispersion of gas fuel and oxygen enriched air are hindered by solid particles, so that the unburnt gas will not be produced in any part of the line beyond the fluidized bed 12 system, and there is not a danger of explosion of gas, as well, while a material 24 to be treated, being dipped in the fluidized bed 12, can be heated efficiently. |
