Smokeless porous carbon production method and its production system

Abstract

A smokeless porous carbon production method and its production system in which porous carbon is produced by heat treating a large amount of material, e.g. wood or bamboo, efficiently in a short time with thermal energy generated by combusting combustible gas produced by heating the material, without combusting the material completely by regulating inflow of air. The smokeless porous carbon production system comprises a sequential carbonization chamber for heating a material M, e.g. wood or bamboo, charged in from a material charging opening from below to carbonize the material sequentially and to generate combustible gas, a high heat treatment chamber disposed below the sequential carbonization chamber continuously thereto, a residual gas combustion chamber communicating with the high heat treatment chamber through a lower opening, an exhaust pipe disposed continuously to the residual gas combustion chamber while being directed upward, and means for taking out an intermediate carbide subjected to high heat treatment in the high heat treatment chamber to the outside of a furnace, wherein air regulation openings for taking in an appropriate amount of outer air are provided in the outer walls of the high heat treatment chamber and the residual gas combustion chamber.

1 . A smokeless porous carbon production method for producing porous carbon by subjecting a material to high heat treatment, comprising a series of steps including: a gasifying-carbonizing step to form an initial carbide by heating the material by regulating inflow of air to generate combustible gas and simultaneously carbonizing the material sequentially; a high heat treatment step to form an intermediate carbide by combusting the combustible gas generated at the gasifying carbonizing step by regulating inflow of air without taking a separating recovering step and then subjecting the initial carbide to high temperature heat treatment; and a step to take out the intermediate carbide subjected to the high heat treatment to the outside of a furnace, wherein the combustible gas generated at the gasifying carbonizing step over the series of steps above is completely combusted at the high heat treatment step and wherein part of the thermal energy thus generated is used as a heat source for heating the material at the gasifying-carbonizing step, so that the continuous operation of a smokeless porous carbon production system is made possible by using only the energy within the system after the operation is started.  
   
   
       2 . A smokeless porous carbon production method as claimed in  claim 1 , wherein dioxin and visible soot and smoke are prevented from being discharged outside the system by completely combusting the combustible gas while the treatment temperature during the continuous operation at the high heat treatment step is maintained at 1200-1400° C. and wherein the intermediate carbide is made intensely porous by the high heat treatment.  
   
   
       3 . A smokeless porous carbon production method as claimed in  claim 1 , wherein the material comprises at least one of wood and bamboo.