| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a high quality active carbon in a short time without requiring any high temperature steam by heating a processing cylinder from the outside such that the inner temperature falls within a specified range while supplying dry steam having temperature within a specified range into the cylinder. SOLUTION: After heating a processing cylinder 18, combustion flows through a lead-out pipe 28A into a boiler 28 and exchanges heat with water from a water supply pipe 28B to produce steam. It is supplied, as dry steam of 300-500 deg.C, to the pipe 23 of a feed screw 22 and jetted from a plurality of steam jet openings 30 made in the pipe 23 into the cylinder 18. A material 20 thrown from a throw-in port 12 is heated by the dry steam jetted from the openings 30 simultaneously with combustion gas from a combustor 26 transmitted through the outer circumferential wall of the cylinder 18 and decomposed thermally in a specified time. A high quality active carbon can be produced through single processing of an organic matter.</p> |
