To provide a furnace structure refined in a high temperature gasifying furnace and hence improve durability of a furnace structure and stabilize furnace conditions in a gasifying processing apparatus that includes a low temperature gasifying furnace, a high temperature gasifying furnace, and a gas cleaning tower for cleaning product gas.
A high temperature gasifying furnace 2 includes a furnace top oxygen introduction inlet 24 for sucking diluted oxygen gas to a furnace top. For a furnace body a cooling jacket 6 is mounted, and an internal layer castable 28 is constructed with good heat conductivity SiC and an innermost castable 29 is constructed with god slug weariness Al2O3 (preferably 10 to 80 weight % Cr2O3-Al2O3). The innermost castable 29 at a furnace top dome is constructed with 10 to 30 weight % Cr2O3-Al2O3 together with a side trunk portion. An annular cooling support 34 is provided while surrounding the throat portion 8 and making contact with a refractory support portion 30. Further, the refractory support portion 30 is formed with a 10 to 80 weight % Cr2O3-Al2 O3 castable.
NAKAMURA TOSHIAKI
HAYASHI SHIGEYA
