Coal dry-distillation device and modified coal production equipment using same

Abstract

A rotary kiln-type coal dry-distillation device that: rotatably supports an inner tube inside an outer tube; supplies heating gas to the interior of the outer tube; moves dried coal from one end side of the inner tube to the other end side, and agitates and dry-distills the dried coal under heat by supplying the dried coal from the one end side of the inner tube to the interior, and rotating the inner tube; sends out dry-distilled coal and dry-distilled gas from the other end side of the inner tube; and has provided therein a pulverized coal supply device that supplies pulverized coal having a particle diameter of no more than 100 μm to the interior of the inner tube, such that the volume of the pulverized coal is 1-10 wt % relative to the amount of dry-distilled coal sent from the other end side of the inner tube.

1 . A rotary kiln-type coal pyrolysis device that rotatably supports an inner tube inside an outer tube and that pyrolyzes under heat while moving and agitating coal from one end side of the inner tube to another end side thereof by rotating the inner tube upon heating gas being supplied to an interior of the outer tube and upon the coal being supplied from the one end side of the inner tube to an interior thereof, so as to send out pyrolyzed coal and pyrolyzed gas from the other end side of the inner tube, the coal pyrolysis device, comprising:
 a pulverized coal supply means that supplies pulverized coal having a particle diameter of less than or equal to 100 μm to the interior of the inner tube, such that a volume of the pulverized coal is 1-10 wt % relative to an amount of the pyrolyzed coal sent from the other end side of the inner tube. 
 
     
     
         2 . The coal pyrolysis device according to  claim 1 , wherein
 the pulverized coal supply means supplies the pulverized coal nearer the other end where a temperature reduction occurs than a middle in an axial direction inside the inner tube.   
     
     
         3 . The coal pyrolysis device according to  claim 1 , wherein
 an exhaust nozzle is provided so that a distal end thereof is positioned between an uppermost position of an opening on the other end side of the inner tube and a surface position of a layer of the pyrolyzed coal present in a lowest position of the opening on the other end side of the inner tube so as to send out the pyrolyzed gas from the other end side of the inner tube.   
     
     
         4 . A modified coal production equipment, comprising: a coal drying means for drying coal; and
 the coal pyrolysis device described in  claim 1  for pyrolyzing dried coal dried with the coal drying means.   
     
     
         5 . The modified coal production equipment according to  claim 4 , further comprising a pyrolyzed coal cooling means for cooling the pyrolyzed coal pyrolyzed by the coal pyrolysis device. 
     
     
         6 . The modified coal production equipment according to  claim 5 , further comprising
 a deactivation treatment means for deactivating the pyrolyzed coal cooled by the pyrolyzed coal cooling means using an oxygen-containing gas.   
     
     
         7 . The modified coal production equipment according to  claim 4 , wherein
 the pulverized coal supply means supplies pulverized coal generated and recovered accompanying the drying of the coal by the coal drying means.   
     
     
         8 . The modified coal production equipment according to  claim 5 , wherein
 the pulverized coal supply means supplies pulverized coal that is a portion of the pyrolyzed coal cooled by the pyrolyzed coal cooling means that is extracted and pulverized.   
     
     
         9 . The modified coal production equipment according to  claim 6 , wherein
 the pulverized coal supply means supplies pulverized coal recovered from the oxygen-containing gas used in the deactivation treatment of the pyrolyzed coal by the deactivation treatment means.