US3516172A - Drying apparatus,particularly for green crops - Google Patents

Drying apparatus,particularly for green crops Download PDF

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Publication number
US3516172A
US3516172A US732158A US3516172DA US3516172A US 3516172 A US3516172 A US 3516172A US 732158 A US732158 A US 732158A US 3516172D A US3516172D A US 3516172DA US 3516172 A US3516172 A US 3516172A
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United States
Prior art keywords
drum
drying
netting
dried
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US732158A
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English (en)
Inventor
Alfred Thygesen Nielsen
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Individual
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/026—Arrangements for charging or discharging the materials to be dried, e.g. discharging by reversing drum rotation, using spiral-type inserts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F26B17/106—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure, e.g. its axis, being substantially straight and horizontal, e.g. pneumatic drum dryers; the drying enclosure consisting of multiple substantially straight and horizontal stretches

Definitions

  • a drying apparatus comprising a preferably rotary drum operating with an axial flow of heated gaseous fluid from which the dried solid material shall be separated
  • this separation is made possible by a piece of netting allowing the gaseous fluid to pass but retaining the solid matter.
  • This solid matter is continuously removed from the netting by means of at least one suction nozzle arranged adjacent the inner side of the netting and operated by a suction source or vacuum pump from which the solid mater may be fed to a briquetting press.
  • This invention relates to a drying apparatus, particularly for green crops, and of the known type comprising a drum, which is arranged for substantially axial throughflow of heated drying air and adjacent the inlet for the drying air comprises means for admitting the material to be dried, which during progressive drying is carried along by the flow of drying air in the direction towards the outlet end of the drum and is then separated from the drying air.
  • Drying apparatuses of the type referred to usually operate at a vacuum, a heated flow of air being sucked through the rotary drum, and the final separation of the dried goods from the air is then performed in the way that the total flow of air with its content of dried parts of the material is led through a cyclone separator, from which the air is expelled to the surroundings.
  • This mode of operation requires, inter alia for the separation stage, a comparatively high power consumption, which is mainly due to the fact that the whole amount of air must pass through the cyclone.
  • the invention aims at providing a drying apparatus which for the same capacity can operate with a considerably reduced power consumption.
  • the drum space is bounded towards the outlet end by a netting for retaining the dried goods, and one or more suction nozzles are provided at the inside of this netting Patented June 23, 1970 for removing the goods retained on the netting during relatlve movement between the netting and the suction nozzle.
  • the drying apparatus may expediently be of the semipneumatic type referred to above, but the drying drum may also be stationary. If in this case it is mounted with its axis horizontal or substantially horizontal, rotary vanes may in a known manner he used for whirling up the goods to be dried in the drum.
  • the netting is incorporated as end wall in the drum, and the suction nozzle or each suction nozzle is constituted by a slotted pipe extending from the periphery of the end wall to its centre and being at the latter connected to a sucking-0E pipe passing through the end wall.
  • the drying apparatus is particularly simple as regards its constructional design, inter alia because the rotation of the drying drum can be utilized for providing the relative movement between the netting and the suction nozzle, so that the latter may be stationary.
  • FIG. 1 is a rather diagrammatic side elevation, partially in section, of the apparatus
  • FIG. 2 a partial section on line IIII in FIG. 1, and
  • FIG. 3 a partial plan view of FIG. 1.
  • the apparatus shown comprises a drum 1 which is mounted with its axis horizontal or substantially horizontal and which can rotate around this axis.
  • the supporting and driving means are not shown in the drawing.
  • the left end of the drum extends into a housing 2 which is supposed to comprise an inlet for the goods to be dried, e.g. new-mown grass, and a fan for effecting a flow of drying air through the drum 1.
  • the housing 2 may furthermore comprise a combustion chamber of a suitable construction.
  • the right end wall of the drum 1 consists substantially of a piece of netting 3 stretched between an inner ring 4 and an outer ring 5.
  • This outer ring is in a suitable way connected to the outer shell of the drum 1, and the inner ring 4 encloses in a sliding manner a stationary closing plate 6, through which a pipe duct 7 extends into the drum 1.
  • the part 8 of the pipe duct located within the drum forms a slotted pipe, see FIG. 2, the slot of which faces the netting 3, and as shown in FIG. 3 the other end of the pipe 7 is connected to the inlet of a fan 9 which is driven by a motor 10 and the outlet 11 of which can lead to an apparatus for compressing the dried material which through the slotted pipe 8 is sucked off the inside of the netting 3.
  • a drying apparatus particularly for green crops, comprising a drum arranged with its axis in a substantially horizontal plane and having an inlet end and an outlet end, means for producing a substantially axial through-flow of heated drying air from said inlet end admitting .goods to be dried into said .drum,-and-meansfor separating the dried goods from the flow of drying air, said separating means comprising a netting for retaining the dried goods while allowing the drying-air to pass through said outlet end, at least one suction nozzle arranged on the upstream side of said netting for removing the goods retained thereon, and means for moving said netting relative to said suction nozzle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
US732158A 1967-06-01 1968-05-27 Drying apparatus,particularly for green crops Expired - Lifetime US3516172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK288367AA DK119758B (da) 1967-06-01 1967-06-01 Tørreapparat, navnlig til grøntafgrøder.

Publications (1)

Publication Number Publication Date
US3516172A true US3516172A (en) 1970-06-23

Family

ID=8116765

Family Applications (1)

Application Number Title Priority Date Filing Date
US732158A Expired - Lifetime US3516172A (en) 1967-06-01 1968-05-27 Drying apparatus,particularly for green crops

Country Status (8)

Country Link
US (1) US3516172A (en:Method)
BE (1) BE717997A (en:Method)
BG (1) BG15076A3 (en:Method)
DE (1) DE1778745A1 (en:Method)
DK (1) DK119758B (en:Method)
FR (1) FR1567587A (en:Method)
GB (1) GB1182986A (en:Method)
NO (1) NO123520B (en:Method)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1651390A (en) * 1927-04-16 1927-12-06 Francis C Hersman Dust-seed-treatment machine
US3058229A (en) * 1960-03-22 1962-10-16 Downing Richard Method and apparatus for drying coal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1651390A (en) * 1927-04-16 1927-12-06 Francis C Hersman Dust-seed-treatment machine
US3058229A (en) * 1960-03-22 1962-10-16 Downing Richard Method and apparatus for drying coal

Also Published As

Publication number Publication date
DK119758B (da) 1971-02-15
BE717997A (en:Method) 1968-12-16
GB1182986A (en) 1970-03-04
FR1567587A (en:Method) 1969-04-08
DE1778745A1 (de) 1971-08-05
BG15076A3 (bg) 1976-06-10
NO123520B (en:Method) 1971-11-29

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