Furnaces – With fuel treatment means – Means for liberating gas from solid fuel
Patent
1985-09-30
1988-03-22
Lacey, David L.
Furnaces
With fuel treatment means
Means for liberating gas from solid fuel
110248, 110256, 110259, 110345, 110346, 48 76, 48111, F23G 5027, F23G 516
Patent
active
047320915
ABSTRACT:
A process which comprises the steps of introducing combustible solid material into an upper section of a pyrolysis chamber, moving the material downwardly at a controlled rate through multiple stage zones in the pyrolysis chamber, passing hot gaseous products of the partial oxidation of carbon char upwardly countercurrent to the movement of the solid material in the pyrolysis chamber, driving off volatile matter in the solid material, depositing carbon char in the lower section of the pyrolysis chamber, introducing air into the lower section of the pyrolysis chamber and partially oxidizing the char to form the hot gaseous products, removing a hot overhead fuel gas, passing the overhead fuel gas to a combustion chamber for combustion thereof with air, and applying the resulting hot combustion gases exiting the combustion chamber to a heat load. Where the combusible solid material contains one or more acid components, the process also includes the step of passing the overhead fuel gas to a zone containing a chemical adsorbent. An apparatus for carrying out the above process comprises a pyrolysis chamber, a feed-lock system for introducing a combustible solid feed material into an upper section of the chamber, a series of spaced vertically disposed horizontally moveble grates in the chamber, an air inlet into the lower section of the pyrolysis chamber, ash removal apparatus in the bottom of the chamber, a combustion chamber for the overhead fuel gas, and a heat load to which the resulting hot combustion gas is applied.
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G.G.C., Inc.
Geldin Max
Lacey David L.
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