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US3792536A Expired / Lapsed US ⏱️ 0.0 years remaining

Rotary dehydrator-granulator

Assignee: American Pollution Prevention Co Inc
•
Filing: 1972-10-19
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Granted: 1974-02-19
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Expires: 1992-10-19
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Abstract

Abstract A rotary dehydrator-granulator is provided for receiving viscid, high moisture content material such as middlings, bran or the like for processing into a dried granular form suitable for livestock feed. The material is conveyed through an inlet and interiorly along an elongated rotating drum by an auger in an open trough which discharges the material at an end opposite the inlet for subsequent tumbling by the drum. A suction fan draws the material, along with hot air emanating from a hot gas source, back toward a perforated screen outlet at the same end of the drum as the inlet. As the material is being tumbled, a portion of the semidried material is deposited in the open auger trough and mixed with moist material. By controlling the temperature of the hot air a predetermined amount of moisture may be removed from the thoroughly mixed material by the time it reaches the outlet, thereby lessening the adhesive quality of the material such that it separates into relatively small, substantially uniform granules of reduced moisture content which drop out of the drum through the outlet. That material which has not been sufficiently dried and formed into granules of a size to permit their exit through the outlet continue to tumble until their size becomes small enough to allow them to drop through the outlet or, in the case of overdrying, the fan draws the material past the outlet and into a dust collector from which the material is returned to the drum for remixing with moist material.

Inventors

  • 👤 Gehee W Mc

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 17:42
CPC Classifications
F; F26; F26B; F26B11/00; F26B11/02; F26B11/026; Y; Y10; Y10S; Y10S366/00; Y10S366/603

Claims Analysis

Total Claims: 17
Claim 1
Independent Claim 166 words
A material dehydrator-granulator including: an elongated drum having a longitudinal, horizontally disposed axis, said drum being rotatable about said axis and being provided with an inlet and an outlet both at one end thereof; a hot gas source in communication with said drum at the opposite end of the latter; a conveyor extending through said inlet and thence longitudinally of the drum for advancing moist material along said drum toward said opposite end, said conveyor having a discharge remote from said inlet for feeding said material into the drum; structure interiorly of and attached to said drum for raising and tumbling said fed material during rotation of the drum for intermixing said material with the hot gases emanating from said source; and means for transferring the intermixed material and gases longitudinally along the interior of said drum toward said outlet, said conveyor being disposed in a position to receive a portion of the tumbling material for admixture with said moist material being advanced by said conveyor.
Claim 2
Dependent Claim 166 words
A material dehydrator-granulator including: an elongated drum having a longitudinal, horizontally disposed axis, said drum being rotatable about said axis and being provided with an inlet and an outlet both at one end thereof; a hot gas source in communication with said drum at the opposite end of the latter; a conveyor extending through said inlet and thence longitudinally of the drum for advancing moist material along said drum toward said opposite end, said conveyor having a discharge remote from said inlet for feeding said material into the drum; structure interiorly of and attached to said drum for raising and tumbling said fed material during rotation of the drum for intermixing said material with the hot gases emanating from said source; and means for transferring the intermixed material and gases longitudinally along the interior of said drum toward said outlet, said conveyor being disposed in a position to receive a portion of the tumbling material for admixture with said moist material being advanced by said conveyor.
Claim 3
Dependent Claim 18 words
A dehydrator-granulator as claimed in claim 1 wherein said conveyor includes an open-top trough having an auger therein.
Claim 4
Dependent Claim 16 words
A dehydrator-granulator as claimed in claim 1 wherein said drum is provided with stationary end walls.
Claim 5
Dependent Claim 15 words
A dehydrator-granulator as claimed in claim 1 wherein said discharge is adjacent said opposite end.
Claim 6
Dependent Claim 18 words
A dehydrator-granulator as claimed in claim 1 wherein said outlet is a perforate wall section of said drum.
Claim 7
Dependent Claim 14 words
A dehydrator-granulator as claimed in claim 5 wherein said section extends around the drum.
Claim 8
Dependent Claim 30 words
A dehydrator-granulator as claimed in claim 1 wherein said structure includes a plurality of rows of elongated, circumferentially spaced vanes secured to the drum therewithin in parallelism with said axis.
Claim 9
Dependent Claim 22 words
A dehydrator-granulator as claimed in claim 7 wherein certain of said vanes are L-shaped and certain other of said vanes are planar.
Claim 10
Dependent Claim 34 words
A dehydrator-granulator as claimed in claim 8 wherein each row of vanes is comprised of a first L-shaped vane, a planar vane and a second L-shaped vane all of which are in longitudinal alignment.
Claim 11
Dependent Claim 31 words
A dehydrator-granulator as claimed in claim 9 wherein said outlet is a perforate wall section, said planar vanes extending across said section and terminating intermediate said section and said opposite end.
Claim 12
Dependent Claim 30 words
A dehydrator-granulator as claimed in claim 8 wherein said L-shaped vanes each have one leg projecting in the direction of rotation of said drum in spaced relationship to the latter.
Claim 13
Dependent Claim 24 words
A dehydrator-granulator as claimed in claim 1 wherein said transfer means includes a suction fan in communication with said drum at said one end.
Claim 14
Dependent Claim 36 words
A dehydrator-granulator as claimed in claim 1 wherein there is provided a dust collector in conjunction with said transfer means for collecting from said gases any particles of material carried beyond said outlet by said means.
Claim 15
Dependent Claim 20 words
A dehydrator-granulator as claimed in claim 13 wherein there is provided apparatus for returning said collected particles to said drum.
Claim 16
Dependent Claim 17 words
A dehydrator-granulator as claimed in claim 14 wherein said apparatus returns said particles to said opposite end.
Claim 17
Dependent Claim 50 words
A dehydrator-granulator as claimed in claim 1 wherein there is provided an elongated shroud in spaced overlying relationship to said drum and said hot gas source, said source and said transfer means being disposed at opposite ends of said drum, the end of said shroud proximal said source being closed.

References Cited (Backward Citations)

US1173188A Cited
US2076873A Cited
US2090177A Cited
US2578166A Cited
US2744338A Cited
AT221048B Cited
US3717937A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-18 1977-08-20 1978-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-18 1981-08-20 1982-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-18 1985-08-20 1986-02-19 $7700.00 Window Closed / Lapsed

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