US3713225A - Pneumatic driers - Google Patents

Pneumatic driers Download PDF

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Publication number
US3713225A
US3713225A US00133841A US3713225DA US3713225A US 3713225 A US3713225 A US 3713225A US 00133841 A US00133841 A US 00133841A US 3713225D A US3713225D A US 3713225DA US 3713225 A US3713225 A US 3713225A
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United States
Prior art keywords
duct
wall
drying
zone
gas
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Expired - Lifetime
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US00133841A
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English (en)
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A Mark
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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
    • 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
    • F26B17/101—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 having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
    • F26B17/103—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 having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis with specific material feeding arrangements, e.g. combined with disintegrating means

Definitions

  • Pressurized air may be forced into a frustro-conical chamber within which the drying duct is interrupted.
  • a mere blade-like jet obliquely directed within the drying duct below the material inlet passage so as to strike the duct wall in front of the latter may be sufficient in some cases.
  • the outer wall of the drying duct may also be protected by a blade like air jet.
  • the apparatus of the kind above referred to may ensure quite good results for a large number of materials. It is always possible to increase the length of the drying duct between the point of introduction of the material and the separator, and/or to recycle at least a fraction of the material issuing from this duct, so as to obtain any value for the residual moisture content.
  • FIG. 6 shows a simplified embodiment of a material feeding device according to the invention.
  • the material issuing from the airlock 8 falls into an inclined passage 32 which may comprise the fluidizing device of FIG. 2.
  • the blowing conduit 12 of fan 13 ends in the form of a flat nozzle 33 adapted to determine within the drying duct 1 and across the full width of the latter a high velocity bladelike air jet (indicated by the arrows 34) which is directed obliquely so as to constitute a screen in front of the outlet of passage 32.
  • the wall of said drying duct having an aperture for passage of the material introduced into said duct by said material introducing means said portion of the inner side of the wall of said duct being situated in front of said aperture and said gas layer creating means being formed of a nozzle opening into said drying duct upstream of said aperture and so arranged as to produce a sheet-like gas layer, obliquely directed with respect to said drying duct in the direction of flow of the said drying gas stream so as to strike said wall portion in front of said aperture and along said wall portion in the same direction as said drying gas stream.
  • said drying duct having a bend and said portion of the inner side of said duct extending in a bend thereof, in the zone of the bend farthest from the center of curvature.
  • passages being in the form of slits provided in the wall of said drying duct, substantially longitudinally to same, with said wall being embossed adjacent each slit so as chamber being in the form of a conduit opening tangentially into same.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
US00133841A 1970-04-28 1971-04-14 Pneumatic driers Expired - Lifetime US3713225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7015389A FR2088855A5 (enExample) 1970-04-28 1970-04-28

Publications (1)

Publication Number Publication Date
US3713225A true US3713225A (en) 1973-01-30

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ID=9054701

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US00133841A Expired - Lifetime US3713225A (en) 1970-04-28 1971-04-14 Pneumatic driers

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US (1) US3713225A (enExample)
FR (1) FR2088855A5 (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838523A (en) * 1973-03-08 1974-10-01 Motch Merryweather Machinery Multi-stage drying apparatus and method
US4034862A (en) * 1974-12-06 1977-07-12 Ab Svenska Flaktfabriken Method and apparatus for separating paper and plastic
DE2622565A1 (de) * 1976-05-20 1977-12-01 Krauss Maffei Ag Verfahren zum trocknen von insbesondere feinkoernigen feststoffpartikeln in einem gasfoermigen traegerstrom und vorrichtung zur durchfuehrung des verfahrens
WO2019213208A1 (en) * 2018-05-01 2019-11-07 Nowaczyk David Apparatus and method for flushing a residual gas from a flow of granular product
EP4230938A1 (en) * 2022-02-17 2023-08-23 G. Larsson Starch Technology AB Drying system and method for drying a product

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054441A (en) * 1932-01-29 1936-09-15 Western Condensing Co Method and apparatus for drying liquid containing materials
US3178830A (en) * 1959-02-16 1965-04-20 Mark Andre Pneumatic drier of the two-biconical drying chamber type
US3441258A (en) * 1967-10-05 1969-04-29 Allis Chalmers Mfg Co Method and apparatus for preheating particulate feed material for a rotary kiln

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054441A (en) * 1932-01-29 1936-09-15 Western Condensing Co Method and apparatus for drying liquid containing materials
US3178830A (en) * 1959-02-16 1965-04-20 Mark Andre Pneumatic drier of the two-biconical drying chamber type
US3441258A (en) * 1967-10-05 1969-04-29 Allis Chalmers Mfg Co Method and apparatus for preheating particulate feed material for a rotary kiln

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838523A (en) * 1973-03-08 1974-10-01 Motch Merryweather Machinery Multi-stage drying apparatus and method
US4034862A (en) * 1974-12-06 1977-07-12 Ab Svenska Flaktfabriken Method and apparatus for separating paper and plastic
DE2622565A1 (de) * 1976-05-20 1977-12-01 Krauss Maffei Ag Verfahren zum trocknen von insbesondere feinkoernigen feststoffpartikeln in einem gasfoermigen traegerstrom und vorrichtung zur durchfuehrung des verfahrens
WO2019213208A1 (en) * 2018-05-01 2019-11-07 Nowaczyk David Apparatus and method for flushing a residual gas from a flow of granular product
US11091283B2 (en) 2018-05-01 2021-08-17 David Nowaczyk Apparatus and method for flushing a residual gas from a flow of granular product
EP4230938A1 (en) * 2022-02-17 2023-08-23 G. Larsson Starch Technology AB Drying system and method for drying a product
WO2023156300A1 (en) * 2022-02-17 2023-08-24 G. Larsson Starch Technology Ab Drying system and method for drying a product

Also Published As

Publication number Publication date
FR2088855A5 (enExample) 1972-01-07

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