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US 12,735,642 B2Granted
Apparatus for carbonizing biomass
AssigneeMitsubishi UBE Cement Corporation
InventorsYuusuke Hiraiwa, Shigeya Hayashi, Nobuyuki Ooi
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Abstract
A biomass carbonizing apparatus (100) includes a rotary kiln (2) as a carbonization furnace configured to carbonize biomass, a combustion furnace (41) configured to combust gas discharged from the carbonization furnace, a duct (42) connecting the carbonization furnace and the combustion furnace, and an oxygen-containing gas feed unit (45) configured to feed oxygen-containing gas to the duct during operation of the carbonization furnace.
Claims1
A biomass carbonizing apparatus comprising:
- a carbonization furnace which is an externally heated rotary kiln configured to carbonize biomass generating a pyrolysis gas containing dust;
- a combustion furnace configured to combust gas discharged from the carbonization furnace;
- a duct connecting the carbonization furnace and the combustion furnace to introduce the pyrolysis gas containing dust generated by the carbonization furnace to the combustion furnace;
- a gas supply path connected to the duct;
- and
- a gas supply source for supplying oxygen-containing gas to the path during operation of the carbonization furnace,
- wherein the gas supply source and the gas supply path are configured to supply the oxygen-containing gas into the duct to combust tar generated in the carbonization furnace within the duct, thereby preventing adhesion of the tar,
- wherein the carbonization furnace is heated by hot gas generated in the combustion furnace,
- wherein a carbonization temperature in the carbonization furnace is 300° C. or lower,
- wherein an oxygen concentration in the carbonization furnace is 10% by volume or less, and
- wherein an oxygen concentration in gas in the duct after feeding the oxygen-containing gas is 10% by volume or less to suppress a dust explosion within the duct.
8 more elements
Dependencies are inferred from the claim text.