Continuously carbonating method and apparatus

Abstract

PROBLEM TO BE SOLVED: To produce activated carbon through a process for surely carrying out the extinguishment of a carbonized material in a method and an apparatus for continuously carbonizing wood chips. SOLUTION: The carbonized material is obtained by repeating processes of moving a raw material M along a nearly fixed route from one side end of an inside cylinder 11 to the outside through an outside cylinder 12 in a rotary furnace having a double cylinder structure, igniting the raw material at another end side of the inside cylinder 11 during the movement and after continuing the combustion, stopping the supply of air to the space S between the inside cylinder and the outside cylinder to extinguish. The activated carbon is produced by carrying out an activating process on the carbonized material with the supply of water and the burning of the carbonized material is extinguished by gaseous nitrogen N<SB>2< / SB>.

Description

technical field [0001] The present invention relates to a method and device for carbonizing raw materials using a rotary furnace with a double-drum structure. Background technique [0002] As a device that can continuously carbonize combustibles, there is a device disclosed in Utility Application No. 50-101475. In this device, the burner is made to face the rotating drum composed of inner and outer double cylinders with spiral wings inside. One end of the inner cylinder is preheated to the specified temperature, the front section of the inner cylinder is heated and dehydrated, and the rear section is fired and carbonized. At the same time, it is slowly cooled during the period of countercurrent in the outer cylinder, and can be taken out continuously. However, in this device, since the screw blades are transported into the outer cylinder by contact with normal temperature air for slow cooling, they will be affected by the heat of the inner cylinder in a burning state. tempe...

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Problems solved by technology

After the incompletely burned embers are discharged out of the equipment, they will burn in contact with the air, which will not only burn the carbides mixed with it, but also be very dangerous.

In addition, although the occurrence of such incomplete burnout is rare, since it is not known when this will occur, the ventilation must be cut off for a long time, and there is a problem of prolonging the production time.

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