Apparatus for pyrolysis of wastes

Claim 1

An apparatus for the pyrolysis of solid wastes comprising: a. a retort having first and second ends and including a pair of spaced coaxially disposed hollow cylindrical members, one member being located within the other, b. an inlet for waste adjacent said first end communicating with the space between said members, c. means for rotating the retort about the axis of said cylindrical members, d. an outlet for pyrolytic residue adjacent said second end communicating with the space between said members, e. heating means adjacent said second end communicating with the interior of said inner member, f. means located in the space between said members intermediate the ends thereof for providing a zone which is substantially more difficulty penetrable by gas than the end portions of said space, thus providing a waste drying zone at the inlet side of said last-mentioned means and a pyrolytic gas generating zone at the outlet side thereof, g. a first fluid exhaust means communicating with said waste drying zone, h. a second fluid exhaust means communicating with said gas generating zone, and i. a helical vane surrounding said inner member and extending substantially from one end to the other of the space between said inner and outer members, wherein the portion of said vane located in said difficulty pentrable zone is imperforate while the portions located on opposite sides of said zone are provided with perforations.

Claim 2

An apparatus for the pyrolysis of solid wastes comprising: a. a retort having first and second ends and including a pair of spaced coaxially disposed hollow cylindrical members, one member being located within the other, b. an inlet for waste adjacent said first end communicating with the space between said members, c. means for rotating the retort about the axis of said cylindrical members, d. an outlet for pyrolytic residue adjacent said second end communicating with the space between said members, e. heating means adjacent said second end communicating with the interior of said inner member, f. means located in the space between said members intermediate the ends thereof for providing a zone which is substantially more difficulty penetrable by gas than the end portions of said space, thus providing a waste drying zone at the inlet side of said last-mentioned means and a pyrolytic gas generating zone at the outlet side thereof, g. a first fluid exhaust means communicating with said waste drying zone, h. a second fluid exhaust means communicating with said gas generating zone, and i. a helical vane surrounding said inner member and extending substantially from one end to the other of the space between said inner and outer members, wherein the portion of said vane located in said difficulty pentrable zone is imperforate while the portions located on opposite sides of said zone are provided with perforations.

Claim 8

An apparatus for the pyrolysis of solid wastes comprising: a. a retort having first and second ends and including a pair of spaced coaxially disposed hollow cylindrical members, one member being located within the other, b. an inlet for waste adjacent said first end communicating with the space between said members, c. means for rotating the retort about the axis of said cylindrical members, d. an outlet for pyrolytic residue adjacent said second end communicating with the space between said members, e. heating means adjacent said second end communicating with the interior of said inner member, f. means located in the space between said members intermediate the ends thereof for providing a zone which is substantially more difficulty penetrable by gas than the end portions of said space, thus providing a waste drying zone at the inlet side of said last-mentioned means and a pyrolytic gas generating zone at the outlet side thereof, g. a first fluid exhaust means communicating with said waste drying zone, h. a second fluid exhaust means communicating with said gas generating zone, i. a helical vane surrounding said inner member and extending substantially from one end of the other of the space between said inner and outer members, and j. a cylinder located in said difficulty penetrated zone and being spaced from the inner wall of said outer member and surrounding said helical vane, said cylinder being connected at one of its ends to the inner wall of said outer member by an annular flange thus forming between said cylinder and outer member an annular chamber opening at one end into the space between said inner and outer members, and wherein said second fluid exhaust means communicate with said annular space.

Claim 9

An apparatus for the pyrolysis of solid wastes comprising: a. a retort having first and second ends and including a pair of spaced coaxially disposed hollow cylindrical members, one member being located within the other, b. an inlet for waste adjacent said first end communicating with the space between said members, c. means for rotating the retort about the axis of said cylindrical members, d. an outlet for pyrolytic residue adjacent said second end communicating with the space between said members, e. heating means adjacent said second end communicating with the interior of said inner member, f. means located in the space between said members intermediate the ends thereof for providing a zone which is substantially more difficulty penetrable by gas than the end portions of said space, thus providing a waste drying zone at the inlet side of said last-mentioned means and a pyrolytic gas generating zone at the outlet side thereof, g. a first fluid exhaust means communicating with said waste drying zone, h. a second fluid exhaust means communicating with said gas generating zone, i. a helical vane surrounding said inner member and extending substantially from one end of the other of the space between said inner and outer members, and j. a cylinder located in said difficulty penetrated zone and being spaced from the inner wall of said outer member and surrounding said helical vane, said cylinder being connected at one of its ends to the inner wall of said outer member by an annular flange thus forming between said cylinder and outer member an annular chamber opening at one end into the space between said inner and outer members, and wherein said second fluid exhaust means communicate with said annular space.