Process of procuding wood charcoal in a moving bed

Details Process of procuding wood charcoal in a moving bed Process of procuding wood charcoal in a moving bed

C - Chemistry, Metallurgy

10

B

C10B 3/00 (2006.01) C10B 53/02 (2006.01)

Patent

CA 2144130

The biomass, particularly lump wood, is supplied to a shaft reactor at its top and is initially preheated to temperatures of about 150 to 280°C and dried by a counterflowing hot gas. This is fol- lowed by a treatment in an underlying carbonizing zone, the upper portion of which is supplied with hot purging gas at a temperature of 250 to 600°C. The hot purging gas flows down- wardly through the carbonizing zone co-currently with the wood. A gas mixture which contains purging gas and gas produced by carbonization is withdrawn from the lower portion of the car- bonizing zone and is at least in part combusted outside the shaft reactor to produce a combustion gas, which is used at least in part as hot purging gas.

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