Process of carbonizing wood to produce wood charcoal

Details Process of carbonizing wood to produce wood charcoal Process of carbonizing wood to produce wood charcoal

C - Chemistry, Metallurgy

10

B

202/25

C10B 49/06 (2006.01) C10B 53/02 (2006.01)

Patent

CA 1311708

ABSTRACT OF THE DISCLOSURE: A process of carbonizing wood in a moving bed shaft reactor, which is flown through by hot rinse gas and is charged with the wood at the top and wood charcoal is withdrawn from the lower portion of the reactor. An exhaust gas which contains gases and vapors produced by the carbonization is withdrawn from the top end of the shaft reactor and is directly fed to a combustion chamber and combustion gases from the combustion chamber are used as hot rinse gas in the shaft reactor. The combustion chamber is separated from the shaft reactor and is provided with a first and a second section, the exhaust gas is combusted in the first section of the combustion chamber with air at an understoichiometric to stoichiometric rate at temperatures from 800 to 1250°C, part of the combustion gas is withdrawn from the first section and is cooled outside of the shaft reactor to temperatures from about 450 to 900°C and is fed as hot rinse gas to the shaft reactor, and the exhaust gas is completely combusted in the second section of the combustion chamber with air supplied at an overstoichio- metric rate.

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