US3777810A - Dryer - Google Patents

Dryer Download PDF

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Publication number
US3777810A
US3777810A US00283387A US3777810DA US3777810A US 3777810 A US3777810 A US 3777810A US 00283387 A US00283387 A US 00283387A US 3777810D A US3777810D A US 3777810DA US 3777810 A US3777810 A US 3777810A
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US
United States
Prior art keywords
fluid
chambers
conduit
disc
outermost
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
Application number
US00283387A
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English (en)
Inventor
D Phillips
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STRONG Manufacturing CO SCOTT
STRONG SCOTT Manufacturing CO US
Berwind Corp
Original Assignee
STRONG Manufacturing CO SCOTT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by STRONG Manufacturing CO SCOTT filed Critical STRONG Manufacturing CO SCOTT
Application granted granted Critical
Publication of US3777810A publication Critical patent/US3777810A/en
Assigned to BERWIND CORPORATION, A CORP. OF PA reassignment BERWIND CORPORATION, A CORP. OF PA MERGER (SEE DOCUMENT FOR DETAILS). PENNSYLVANIA, EFFECTIVE OCT. 2, 1982. Assignors: BEPEX CORPORATION, A CORP. OF DE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/135—Movable heat exchanger
    • Y10S165/139—Fully rotatable

Definitions

  • ABSTRACT Apparatus for drying moist solid material of the type utilizing disc heat exchange elements into which a heating fluid is introduced and cooled fluid is withdrawn, the material being dried through contact with a plurality of discs in its passage through the apparatus.
  • the present apparatus is characterized by torus discs formed from relatively thin-walled circular metal plates for good heat transfer to the material and having a plurality of concentric rings of convex arcuate cross section for strength.
  • the disc encloses a plurality of interconnected concentric generally toroidal chambers through which heating fluid, such as steam, is circulated successively and from the outermost of which cooled fluid, such as condensate, is withdrawn.
  • This invention is directed to a drying apparatus of the I the present apparatus is the type in which the rotor ineludes disc heating elements through which a heating fluid circulates.
  • the present apparatus is characterized by torus discs of thinwalled heat conducting metal for good transfer of heat, the discs being formed from circular plates having a plurality of concentric rings of convex arcuate cross section for strength and maximum heat conducting surface.
  • FIG. 1 is a side elevation of the dryer of the present invention shown partly broken away to reveal internal structure
  • FIG. 2 is a fragmentary elevation partly in section and partly broken 'away showing details of structure of the dryer rotor
  • FIG. 3 is a vertical section on an enlarged scale of a cross sectional view of the present invention.
  • the apparatus comprises a horizontally disposed housing of circular or oval or U-shaped cross section supported at one end by a pair of legs 11 and cradled adjacent the opposite end in a saddle 12.
  • a shaft, indicated generally at 13, extends,
  • housing 10 having a generally U-shaped cross section, is provided with a flat cover.21.
  • a material inlet 22 to the housing is provided adjacent one end thereof.
  • a vapor exhaust 23 from the housing is provided at the other end.
  • One or more covered access ports 24 are desirably provided in cover 21.
  • Housing 10 is desirablydouble-walled over at least part of its surface being provided with a jacket 25 having at least two headers 26 and 27 for introduction and discharge of a heating fluid, such as steam, to the narrow space between the housing wall and jacket wall.
  • a discharge weir 28 communicates through the end wall of the housing with the drying chamber for removal of dried material.
  • Rotor shaft 13 includes an outer tube 30 and inner concentric tube 31.
  • the annular space between tubes 30 and 31 is a conduit 32 for passageof heating fluid such as steam to each of a plurality of disc heating elements, indicated generally at 33, carried by the shaft.
  • the space 34 within tube 31 serves as a conduit for return passage of cooled fluid, such as condensate, from discs 33.
  • Outer tube 30 is provided with a plurality of ports 35 corresponding in number to the number of discs 33 mounted on the shaft. Ports 35 for alternate discs are desirably disposed on opposite sides of tube 30.
  • Tubes 30 and 31 are each provided with ports 36 and 37, respectively, in registry to receive a condensate return tube 38.
  • Ports 36 are present in number corresponding to the number of discs 33 and are disposed on opposite sides of tube 30 from ports 35 and alternating ports 36 are disposed on opposite sides of the tube.
  • Tube 38 preferably extends radially inwardly to at least the longitudinal axis of tube 31 to prevent backflow of condensate into the discs as the rotor turns.
  • Each disc heating element includes a hub 40 having a pair of ports 41 and 42 which are in registry with ports 35 and 36 when hub 40 is brazed or otherwise mounted on tube 30.
  • Hub 40 is provided 'with a pair of spaced apart backup rings 43 welded or other-wise secured to the outer perimeter of the hub on opposite sides of ports 41 and 42.
  • a pair of facing circular rotor torus plates, indicated generally at 44, make up the outer walls of the discs 33.
  • Each rotor torus is composed of a plurality of concentric rings 45, 46 of convex arcuate cross section. The inner peripheries of torus plates 44 are welded or otherwise secured to backup rings 43 and hub 40.
  • each rotor torus is a flange 47 welded or otherwise secured to outer disc ring 48.
  • Convex torus rings 45 and 46 are separated by a concentric flat circular ring by which the torus plates are welded or otherwise secured to an inner disc ring 50.
  • Outer chamber 52 is in communication with inner chamber 51 to receive heating fluid thereform through port 53 in inner ring 50.
  • Port 53 is dis posed generally on the opposite side of the rotor from ports 41 and 35.
  • an arcuate tubular collector conduit 54 is disposed within chamber 52 against its outermost peripheral wall adjacent to outer disc ring 48.
  • One end of collector conduit 54 in the direction of rotation of the rotor is open and the opposite end is connected to a tubular conduit 55 for removing collected condensate or similar cooling fluid.
  • Remover tube 55 extends generally radially through port 36 in inner disc ring 50 and port 42 in hub 40 to communicate with radial tube 38 which extends through shaft tubes 30 and 31 to condensate return conduit 34.
  • collector tube 54 functions as a scoop to gather up accumulated condensate at the outer periphery of chamber 52.
  • the condensate is propelled the length of the collector tube into the remover tube 55 and thence into the condensate return conduit 34.
  • Condensate return conduit 34 terminates in a short chamber 56 at one end of the shaft.
  • Chamber 56 is of greater diameter than inner tube 31 such that returning condensate collects in a pool in the bottom of chamber 56.
  • a condensate return fitting 57 is journaled in bearing 58 mounted in shaft end plate 59.
  • a vertically disposed tube 60 extends downward from fitting 57 into the bottom of chamber 56. Tube 60 is of such length that it extends beyond the outer perimeter of inner shaft tube 3 1 so that, when the dryeris in operation,'it extends into the pool of collected condensate in the bottom of chamber 56.
  • a condensate return pipe 61 extends from the opposite end of fitting 57 through the end of the shaft for removal and discharge of the condensate. As shaft 13 rotates, fitting 57, tube 60 and pipe 61 all remain stationary being journaled in bearing 58 so that the bottom of chamber 56 functions as a trap through which the condensate is withdrawn and discharged.
  • the outer peripheries of the rotor heat exchange discs are desirably provided with a plurality of paddles 62.
  • Each paddle 62 is secured to the outer periphery of outer .disc ring 48.
  • the paddles extend to close proximity with the inner housing wall sufficient to permit rotation with close clearance with respect to the wall.
  • the pad dles are desirably disposed at an angle relative to the longitudinal axis of the apparatus, the precise angle being determined by the desired rate of movement of the material through the housing, rotor speed, etc.
  • a rotor plow 63 is secured to the inside wall of the housing so as to extend between each adjacent pair of discs to just short of disc hub 40 to prevent accumulation and buildup of material between the discs.
  • the surfaces of the discs and housing are smooth and polished to minimize adherence of material.
  • a valve 64 is provided to facilitate cleaning, etc. of the dryer.
  • the torus disc heating elements in combination with the steam jacket of the drying chamber provides a good concentration of heating area per unit of volume.
  • the thin-walled construction permitted by the novel torus design provides efficient heat exchange and increased surface area without sacrifice of disc strength.
  • the torus disc plates 44 for a 23 inch diameter dryer, for example, are desirably formed from 14 gauge stainless steel.
  • the design of the discs makes possible a concentration of up to 85 per cent of the total heating surface on the rotor. In addition to insuring a compact unit, this is advantageous for the drying process.
  • the dryer is especially adapted for high heat load and long residence type drying of plastics, chemicals, foods and food byproducts.
  • An apparatus for drying solid materials comprising: t
  • port means interconnecting adjacent chambers for pa'ssageof heating fluid
  • each of said disc heating elements comprises:
  • a housing having a pair of facing thin-walled circular plates having a plurality of concentric rings of convex arcuate cross section enclosing a plurality of concentric generally toroidal chambers,
  • said rotor shaft includes a pair of concentric tubes
  • the space between said tubes is a conduit for introducing heating fluid to the disc heating elements and the space within the innermost tube is a return conduit for cooler fluid,
  • tubular conduits extending through the walls of both concentric tubes communicate with the fluid collecting and removing means of the outermost disc chamber.
  • A. said housing is double-walled over at least part of its surface, and B. inlet and outlet means are provided in communication with the space between said walls for circulation of heating fluid therein. 6.An apparatus according to claim 1 further characterized in that:
  • each disc heating element comprises a hub carryi'nga'pair of facing thin-walled circular heat conducting plates, said plates having a plurality of con- "centri'c' rings of convex arcuate cross section enerasing a plurality of concentric generally toroidal chambers,
  • entry port means in the outermost tube of the rotor shaft communicate with entry port means in said hub
  • E. collector means are provided within the outermost chamber for collecting cooler fluid
  • conduit means are provided connected to said collector means for removing cooler fluid
  • tubular conduits extending through the walls of both concentric tubes of the rotor shaft communicate with discharge port means in said hub for removing cooler fluid.
  • said entry port means and discharge port means in said hub are disposed generally on opposite sides of the hub
  • each port interconnecting one of said chambers with another is disposed generally on the opposite side of the chamber from the fluid entry port to that chamber for maximum 'circulaton of fluid through said chambers.
  • a disc heating element for use in a rotary drying apparatus comprising:
  • conduit means connected to said collecting means and discharge port means for removing cooler fluid.
  • a disc according to claim 9 further characterized in that said fluid collecting and removing means comprises:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
US00283387A 1972-08-24 1972-08-24 Dryer Expired - Lifetime US3777810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28338772A 1972-08-24 1972-08-24

Publications (1)

Publication Number Publication Date
US3777810A true US3777810A (en) 1973-12-11

Family

ID=23085819

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283387A Expired - Lifetime US3777810A (en) 1972-08-24 1972-08-24 Dryer

Country Status (5)

Country Link
US (1) US3777810A (enrdf_load_stackoverflow)
JP (1) JPS5636354B2 (enrdf_load_stackoverflow)
BR (1) BR7306557D0 (enrdf_load_stackoverflow)
CA (1) CA1000490A (enrdf_load_stackoverflow)
DE (1) DE2342843A1 (enrdf_load_stackoverflow)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923097A (en) * 1973-05-01 1975-12-02 Atlas As Heat exchanger
US4353413A (en) * 1980-09-08 1982-10-12 Chemetron Process Equipment, Inc. Rendering dryer
US4636127A (en) * 1985-04-03 1987-01-13 The International Metals Reclamation Co., Inc. Conveying screw for furnace
US4711041A (en) * 1984-10-04 1987-12-08 A/S Atlas Rotary drier with lifting element
US4727658A (en) * 1986-04-03 1988-03-01 A/S Atlas Drying machine
WO1989006337A1 (en) * 1987-12-28 1989-07-13 Henrik Ullum Device for heating and/or drying
WO1993017291A1 (en) * 1992-02-26 1993-09-02 Wykes Engineering Co. (Rushden) Ltd. Multi-disc heat exchanger
EP0693142A4 (en) * 1993-03-01 1997-07-16 Hosokawa Bepex Corp SYSTEM FOR CRYSTALLIZING A POLYMERIZATION PRODUCT
ES2110870A2 (es) * 1994-03-10 1998-02-16 Mc Enman S L Aparato y procedimiento para deshumectar productos en forma de pasta por evaporacion intensiva.
US6061924A (en) * 1997-03-28 2000-05-16 Rubicon Development Co. L.L.C. Batch sludge dehydrator
US6170168B1 (en) * 1996-10-08 2001-01-09 Atlas-Stord Denmark A/S Circular drying element and drying plant with such a drying element
US20030168206A1 (en) * 2001-07-26 2003-09-11 Larsen Yngve Sten Rotary disc-type heat exchanger
US20030201255A1 (en) * 2001-02-22 2003-10-30 Karsten Manetsberger Method and device for selective laser sintering
US20060281896A1 (en) * 2005-04-01 2006-12-14 Honeywell Federal Manufacturing & Technologies System for removing contaminants from plastic resin
US20070228600A1 (en) * 2005-04-01 2007-10-04 Bohnert George W Method of making containers from recycled plastic resin
US20100018671A1 (en) * 2006-10-25 2010-01-28 Nara Machinery Co., Ltd Heat exchanging device for powder, and method for manufacturing the same
US20100236580A1 (en) * 2007-05-15 2010-09-23 Delaurentiis Gary M METHOD AND SYSTEM FOR REMOVING PCBs FROM SYNTHETIC RESIN MATERIALS
US9127227B2 (en) 2011-09-16 2015-09-08 Astec, Inc. Method and apparatus for processing biomass material
US9150790B2 (en) 2010-05-03 2015-10-06 Icm, Inc. Rotary torrefaction reactor
US9562204B2 (en) 2012-09-14 2017-02-07 Astec, Inc. Method and apparatus for pelletizing blends of biomass materials for use as fuel
US9855677B2 (en) 2013-07-29 2018-01-02 Astec, Inc. Method and apparatus for making asphalt concrete using aggregate material from a plurality of material streams
WO2019199166A1 (en) 2018-04-10 2019-10-17 Hosokawa Micron B.V. Drying device, rotary valve and drying method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153896U (enrdf_load_stackoverflow) * 1985-03-16 1986-09-24
JPS61153897U (enrdf_load_stackoverflow) * 1985-03-16 1986-09-24
JP2014077587A (ja) * 2012-10-10 2014-05-01 Mitsubishi Materials Techno Corp ディスク型乾燥装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB789439A (en) * 1956-10-16 1958-01-22 Stord Marin Ind As Steam heated drying apparatus for drying moist materials
CA811020A (en) * 1969-04-22 J. Stevens Norbert Thermal processor
US3563710A (en) * 1968-02-16 1971-02-16 Monsanto Co Polymerization apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA811020A (en) * 1969-04-22 J. Stevens Norbert Thermal processor
GB789439A (en) * 1956-10-16 1958-01-22 Stord Marin Ind As Steam heated drying apparatus for drying moist materials
US3563710A (en) * 1968-02-16 1971-02-16 Monsanto Co Polymerization apparatus

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923097A (en) * 1973-05-01 1975-12-02 Atlas As Heat exchanger
US4353413A (en) * 1980-09-08 1982-10-12 Chemetron Process Equipment, Inc. Rendering dryer
US4711041A (en) * 1984-10-04 1987-12-08 A/S Atlas Rotary drier with lifting element
US4636127A (en) * 1985-04-03 1987-01-13 The International Metals Reclamation Co., Inc. Conveying screw for furnace
US4727658A (en) * 1986-04-03 1988-03-01 A/S Atlas Drying machine
AU626519B2 (en) * 1987-12-28 1992-08-06 Henrik Ullum Device for heating and/or drying
WO1989006337A1 (en) * 1987-12-28 1989-07-13 Henrik Ullum Device for heating and/or drying
WO1993017291A1 (en) * 1992-02-26 1993-09-02 Wykes Engineering Co. (Rushden) Ltd. Multi-disc heat exchanger
EP0693142A4 (en) * 1993-03-01 1997-07-16 Hosokawa Bepex Corp SYSTEM FOR CRYSTALLIZING A POLYMERIZATION PRODUCT
ES2110870A2 (es) * 1994-03-10 1998-02-16 Mc Enman S L Aparato y procedimiento para deshumectar productos en forma de pasta por evaporacion intensiva.
ES2121487A1 (es) * 1994-03-10 1998-11-16 Mc Enman S L Mejoras en el objeto de la patente principal p 9400489, por "aparato y procedimiento para deshumectar productos en forma de pasta por evaporacion intensiva.
US6170168B1 (en) * 1996-10-08 2001-01-09 Atlas-Stord Denmark A/S Circular drying element and drying plant with such a drying element
US6061924A (en) * 1997-03-28 2000-05-16 Rubicon Development Co. L.L.C. Batch sludge dehydrator
US20030201255A1 (en) * 2001-02-22 2003-10-30 Karsten Manetsberger Method and device for selective laser sintering
US6858816B2 (en) * 2001-02-22 2005-02-22 Daimlerchrysler Ag Method and device for selective laser sintering
US20030168206A1 (en) * 2001-07-26 2003-09-11 Larsen Yngve Sten Rotary disc-type heat exchanger
US7838628B2 (en) 2005-04-01 2010-11-23 Honeywell Federal Manufacturing & Technologies, Llc System for removing contaminants from plastic resin
US20070228600A1 (en) * 2005-04-01 2007-10-04 Bohnert George W Method of making containers from recycled plastic resin
US20060281896A1 (en) * 2005-04-01 2006-12-14 Honeywell Federal Manufacturing & Technologies System for removing contaminants from plastic resin
US20100018671A1 (en) * 2006-10-25 2010-01-28 Nara Machinery Co., Ltd Heat exchanging device for powder, and method for manufacturing the same
US8813833B2 (en) * 2006-10-25 2014-08-26 Nara Machinery Co., Ltd. Heat exchanging device for powder, and method for manufacturing the same
US20100236580A1 (en) * 2007-05-15 2010-09-23 Delaurentiis Gary M METHOD AND SYSTEM FOR REMOVING PCBs FROM SYNTHETIC RESIN MATERIALS
US9150790B2 (en) 2010-05-03 2015-10-06 Icm, Inc. Rotary torrefaction reactor
US10414994B2 (en) 2010-05-03 2019-09-17 Icm, Inc. Rotary torrefaction reactor
US9127227B2 (en) 2011-09-16 2015-09-08 Astec, Inc. Method and apparatus for processing biomass material
US9562204B2 (en) 2012-09-14 2017-02-07 Astec, Inc. Method and apparatus for pelletizing blends of biomass materials for use as fuel
US9855677B2 (en) 2013-07-29 2018-01-02 Astec, Inc. Method and apparatus for making asphalt concrete using aggregate material from a plurality of material streams
WO2019199166A1 (en) 2018-04-10 2019-10-17 Hosokawa Micron B.V. Drying device, rotary valve and drying method

Also Published As

Publication number Publication date
CA1000490A (en) 1976-11-30
JPS4959342A (enrdf_load_stackoverflow) 1974-06-08
DE2342843A1 (de) 1974-03-07
BR7306557D0 (pt) 1974-08-15
JPS5636354B2 (enrdf_load_stackoverflow) 1981-08-24

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Owner name: BERWIND CORPORATION, A CORP. OF PA

Free format text: MERGER;ASSIGNOR:BEPEX CORPORATION, A CORP. OF DE;REEL/FRAME:004223/0921

Effective date: 19831026

STCF Information on status: patent grant

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