US3850755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pyrolytic decomposition or heat treatment of material
Assignee: PYROWASTE Corp A CORP OF
•
Filing: 1973-04-23
•
Granted: 1974-11-26
•
Expires: 1993-04-23
Abstract
Abstract A wheel-supported frame carrying a reciprocating shaker conveyor is movable into and out of one end of an enclosed, air-tight, heated chamber. The chamber has removable side and top walls, lined with precast, high-temperature ceramic blocks on the sides and top to reflect heat down into material on the conveyor, said blocks being loose-fitting for expansion and keyed together. The top ceramic blocks rest on the side ceramic blocks and the sides stand on shelves fixed to the supporting structure of the chamber. The movable frame carries a transverse vertical panel that forms a removable end wall for the chamber. A motor and driving mechanism on the outside of said end wall reciprocates the shaker conveyor through a sliding pushrod passing through the wall. Material to be processed is fed to the receiving end of the conveyor through an air lock hopper, and charred residue is removed from the chamber at the other end through another air lock. Gas produced by pyrolytic decomposition is drawn off through a pipe.
Inventors
- 👤 J Welty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
C; C10; C10B; C10B7/00; C10B7/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
250 words
Apparatus for pyrolytic decomposition of organic material, comprising: an enclosed chamber comprising a structural framework, an airtight outer shell, and an inner ceramic lining for thermal insulation and to reflect heat; said outer shell being made up of a plurality of plates mounted on said framework and separately removable therefrom to provide access from the outside to any desired portion of said lining for repair purposes; said lining comprising a plurality of separate ceramic blocks which are loose-fitting for expansion, and the blocks forming the side walls of said chamber being joined together at their abutting edges by removable keys seated in grooves in the blocks; the blocks forming the side walls of said lining having portions thereof standing on supports formed by said framework; said blocks being individually removable for replacement purposes by first withdrawing said keys from opposite side edges of the block to be removed; means for heating the interior of said chamber up to a temperature at which pyrolytic decomposition of said material takes place; a conveyor mounted within said chamber and extending the length thereof, said conveyor having a receiving end and a discharge end; supply means, including a first air lock, for introducing material from outside said chamber to said receiving end of said conveyor; discharge means, including a second air lock, for receiving the charred residue from said discharge end of said conveyor, and removing it from said chamber; and means for drawing off gases generated by the pyrolytic decomposition of said material.
Claim 2
Dependent Claim
250 words
Apparatus for pyrolytic decomposition of organic material, comprising: an enclosed chamber comprising a structural framework, an airtight outer shell, and an inner ceramic lining for thermal insulation and to reflect heat; said outer shell being made up of a plurality of plates mounted on said framework and separately removable therefrom to provide access from the outside to any desired portion of said lining for repair purposes; said lining comprising a plurality of separate ceramic blocks which are loose-fitting for expansion, and the blocks forming the side walls of said chamber being joined together at their abutting edges by removable keys seated in grooves in the blocks; the blocks forming the side walls of said lining having portions thereof standing on supports formed by said framework; said blocks being individually removable for replacement purposes by first withdrawing said keys from opposite side edges of the block to be removed; means for heating the interior of said chamber up to a temperature at which pyrolytic decomposition of said material takes place; a conveyor mounted within said chamber and extending the length thereof, said conveyor having a receiving end and a discharge end; supply means, including a first air lock, for introducing material from outside said chamber to said receiving end of said conveyor; discharge means, including a second air lock, for receiving the charred residue from said discharge end of said conveyor, and removing it from said chamber; and means for drawing off gases generated by the pyrolytic decomposition of said material.
Claim 3
Dependent Claim
41 words
The apparatus of claim 1, wherein said chamber includes vertical supporting posts between laterally adjacent pairs of steel plates, said supporting posts having shelves projecting horizontally inward, and the bottom edges of said ceramic blocks resting on said shelves for support.
Claim 4
Dependent Claim
36 words
The apparatus of claim 2, wherein said means for heating the interior of said chamber comprises radiant heating tubes passing through said supPorting posts above said conveyor and extending transversely across the interior of the chamber.
Claim 5
Dependent Claim
67 words
The apparatus of claim 1, wherein each of said side ceramic blocks has horizontal and vertical channels formed in their abutting edges, which cooperate to form horizontal and vertical keyways between each pair of blocks; and removable key members inserted into said vertical keyways and into said horizontal keyways, whereby each pair of abutting blocks is held against horizontal and vertical movement with respect to one another.
Claim 6
Dependent Claim
52 words
The apparatus of claim 1, wherein said conveyor has a ceramic lining on its top side, said ceramic lining including upwardly projecting side flanges that extend above the bottom edges of the side blocks on the outside thereof, in an overlapping manner, whereby a radiant heat shield is provided at this point.
Claim 7
Dependent Claim
130 words
The apparatus of claim 1, wherein said conveyor is reciprocably mounted on a supporting frame having wheels that run on tracks extending the length of said chamber and out through one end thereof, said one end of said chamber having an opening through which said conveyor and its supporting frame can pass; a vertical wall mounted on said supporting frame near one end thereof, said vertical wall cooperating with the edges of said opening in said one end of said chamber to form an airtight closure therefor that is removable with said conveyor and its supporting frame; and means mounted on said supporting frame on the outside of said vertical wall for reciprocating said conveyor, said means being connected to said conveyor by motion-transmitting means passing through said vertical wall.
Claim 8
Dependent Claim
75 words
The apparatus of claim 6, wherein said conveyor is supported on said frame by means of a plurality of generally vertically extending spring legs that bend in the fore-and-aft direction to provide reciprocating support for the conveyor; and said motion-transmitting means comprises a push-rod passing through said vertical wall and slidably supported thereon, the inner end of said push-rod being connected to said conveyor, and the outer end thereof being connected to said conveyor-reciprocating means.
Claim 9
Dependent Claim
71 words
The apparatus of claim 1, wherein the top ceramic blocks forming the ceiling of said chamber are elongated and span the full width of said chamber, with their ends resting on the top ends of said blocks forming the side walls of the chamber, said top blocks being loose-fitting for expansion and being secured to one another by keys inserted in horizontal grooves formed in the facing edges of adjacent blocks.
Claim 10
Dependent Claim
24 words
The apparatus of claim 1, wherein said discharge means includes a water-cooled conveyor for cooling the hot charred residue prior to discharging the same.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |