US3927715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple deck drying apparatus
Assignee: Individual
•
Filing: 1974-08-16
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Granted: 1975-12-23
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Expires: 1994-08-16
Abstract
Abstract Apparatus for treating a material by indirect heat exchange comprising a plurality of decks along which the material is passed by transversely extending scrapper blades the ends of which are attached to conveyor chains, the decks comprising the tops of enclosed heat exchange chambers containing a heat exchange fluid. The material passes from one deck to another with the decks being vertically spaced so that material drops from one deck onto the next lower deck. Vapor emanating from the material is exhausted under a vacuum. The apparatus has particular utility for the drying of wet coal since the coal is maintained out of direct contact with the heating fluid and thus coal dust does not exhaust to the atmosphere in the heating fluid.
Inventors
- 👤 Alder F Castanoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:52
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/001; F26B17/003; F26B17/02; F26B3/00; F26B3/18; F26B3/22; Y; Y10; Y10S; Y10S165/00; Y10S165/225; Y10S165/227
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
194 words
Apparatus for subjecting a material to indirect heat exchange comprising an enclosed casing, means defining a plurality of closed chambers containing a heat exchange medium disposed in said casing and spaced in a vertical direction from each other, each of said chambers being defined in part by an upper impervious deck along which the material being treated moves, said decks preventing direct contact between the material thereon and the heat exchange medium in said chambers, endless conveyor means having an upper pass disposed adjacent to a deck of one of said chambers and having a lower pass disposed between and adjacent the upper deck of another of said chambers and a lower impervious bottom of the superadjacent chamber, said endless conveyor means including a plurality of transversely extending blades spaced therealong, said blades being positioned to move the material along said decks, means for introducing a material to be treated onto one end of the uppermost deck, means to transfer material from a deck onto the next lower deck, means to discharge treated material from the lower deck, and means for maintaining a vacuum in said casing to exhaust vapor emanating from said material.
Claim 2
Dependent Claim
194 words
Apparatus for subjecting a material to indirect heat exchange comprising an enclosed casing, means defining a plurality of closed chambers containing a heat exchange medium disposed in said casing and spaced in a vertical direction from each other, each of said chambers being defined in part by an upper impervious deck along which the material being treated moves, said decks preventing direct contact between the material thereon and the heat exchange medium in said chambers, endless conveyor means having an upper pass disposed adjacent to a deck of one of said chambers and having a lower pass disposed between and adjacent the upper deck of another of said chambers and a lower impervious bottom of the superadjacent chamber, said endless conveyor means including a plurality of transversely extending blades spaced therealong, said blades being positioned to move the material along said decks, means for introducing a material to be treated onto one end of the uppermost deck, means to transfer material from a deck onto the next lower deck, means to discharge treated material from the lower deck, and means for maintaining a vacuum in said casing to exhaust vapor emanating from said material.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1, further comprising connecting means interconnecting said chambers to enable heat exchange medium to flow from one chamber to another in seqUence.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 2, wherein said chambers and said decks extend substantially the full width of said casing.
Claim 5
Dependent Claim
32 words
Apparatus according to claim 1, wherein there are at least four decks, and wherein said endless conveyor means comprise a pair of endless conveyors each having two passes associated with different decks.
Claim 6
Dependent Claim
84 words
Apparatus according to claim 4, wherein said two conveyors comprise a large conveyor and a smaller conveyor, said large conveyor having its upper pass over the uppermost deck and having its lower pass over the lowermost deck, said smaller conveyor having its upper pass over the deck beneath the uppermost deck and its lower pass over the next deck below, said smaller conveyor being disposed between the upper and lower passes of said large conveyor, and means to drive said conveyors in opposite directions.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |