EP0901600A1 - Continuous dryer with permanent magnets - Google Patents
Continuous dryer with permanent magnetsInfo
- Publication number
- EP0901600A1 EP0901600A1 EP97922003A EP97922003A EP0901600A1 EP 0901600 A1 EP0901600 A1 EP 0901600A1 EP 97922003 A EP97922003 A EP 97922003A EP 97922003 A EP97922003 A EP 97922003A EP 0901600 A1 EP0901600 A1 EP 0901600A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dryer according
- previous
- permanent magnets
- rotating cylinder
- drum
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 230000006698 induction Effects 0.000 claims abstract description 4
- 230000005291 magnetic effect Effects 0.000 claims description 12
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000010025 steaming Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
- F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
- F26B13/183—Arrangements for heating, cooling, condensate removal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
- F24V99/00—Subject matter not provided for in other main groups of this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/105—Drying webs by contact with heated surfaces other than rollers or drums
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
Definitions
- the present invention relates to a continuous dryer with permanent magnets, and in particular to a dryer for continuous sheet materials, wherein the drying heat is produced by eddy currents (also named Foucault currents) induced in a plate or a metal drum by a rotating cylinder comprising a plurality of permanent magnets.
- eddy currents also named Foucault currents
- Continuous dryers are known to comprise one or more heating metal surfaces, generally plane or cylindrical, which give heat to the material to be dried, driven on said surfaces.
- the continuous running dryers are particularly used in the textile and paper industries for drying textiles and printed sheets respectively.
- the material to be dried is heated by means of conduction, convection or radiation.
- Each of the three kinds of dryers must be provided with a unit, for instance an electric unit or a steaming unit, which supplies a specific amount of thermal energy suitable for quickly drying, without overheating, the treated material, which is often flammable. Therefore, the known dryers are quite complicated, need a non-stop maintenance and further consume a remarkable amount of energy.
- Object of the present invention is therefore to provide a dryer free from such drawbacks, namely a dryer of simple manufacture wherein the supply of thermal energy to the material to be dried is easily adjustable. Such an object is achieved by a dryer having the characteristics disclosed in claim 1.
- FIG. 1 shows a longitudinal section schematic view of an embodiment of the dryer according to the present invention
- FIG. 1 shows a cross- sectional schematic view of the dryer in Fig. 1;
- - Fig. 3 shows a cross-sectional schematic view of a second embodiment of the dryer according to the present invention
- - Fig. 4 shows a front schematic view of an embodiment of the dryer magnetic cylinder
- Fig. 5 shows a front schematic view of a second embodiment of the diyer magnetic cylinder.
- the dryer comprises a cylinder 1, preferably made of ferromagnetic steel, on whose bases two shafts 2,2 ⁇ rotatably mounted on two roller bearings 3,3', are fastened, coaxially with the cylinder.
- One of the two shafts is keyed to a motor 4 whose rotation speed can be adjusted by known control means (not shown in figure).
- a drum 7 of electroconductive material, preferably aluminium, rotatably mounted on shafts 2,2' by means of a pluraUty of rollers 8. is coaxially arranged on the outside of rotating cylinder 1.
- the inner surface of drum 7 is suitably arranged at a minimum distance from permanent magnets 5 so that the whole drum 7 is immersed, without remarkable dispersions, in the magnetic field produced by magnets 5.
- the material 9 to be dried usually made of a continuous paper sheet, a continuous piece of fabric or another winded material, turns round drum 7 for about a half of its cylindrical development.
- toothing 10 engaged in a toothed wheel I I .
- toothed wheel 1 1 is keyed on the hub of a oleodynamic pump 12 connected in series by an hydraulic circuit 13 to an oil tank 14 and to a throttle valve 15 for the oil flow.
- Said circuit further comprises a safety-valve 16, parallel connected to valve 15, acting to compensate sudden pressure changes, if any, within hydraulic circuit 13.
- valve 15 By opening or closing valve 15 it is thus possible to adjust the braking action of hydraulic circuit 13 on the rotation speed of drum 7 according to the rotation speed of cylinder 1, wherefore such drum warms up owing to the eddy currents induced by the rotating magnetic field produced by the relative rotation of cylinder 1.
- the heating surface comprises, instead of a drum. a plane sheet 7, also preferably made of alumhiium, horizontally arranged in a tangent position with respect to cylinder 1.
- a plane sheet 7 also preferably made of alumhiium, horizontally arranged in a tangent position with respect to cylinder 1.
- This type of dryer is much more simple from a technical viewpoint than the preferred embodiment, but the adjustment of the amount of heat supplied to the material to be dried can be done only by adjusting at the same time the rotation speed of cylinder 1 and the forward speed of such material, wherefore the drying operation is no longer independent from this latter parameter.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Drying Of Solid Materials (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI961079 | 1996-05-29 | ||
IT96MI001079A IT1282752B1 (it) | 1996-05-29 | 1996-05-29 | Essiccatore in continuo a magneti permanenti |
PCT/IB1997/000644 WO1997045686A1 (en) | 1996-05-29 | 1997-05-28 | Continuous dryer with permanent magnets |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0901600A1 true EP0901600A1 (en) | 1999-03-17 |
Family
ID=11374336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97922003A Withdrawn EP0901600A1 (en) | 1996-05-29 | 1997-05-28 | Continuous dryer with permanent magnets |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0901600A1 (it) |
JP (1) | JP2000511270A (it) |
AU (1) | AU2786397A (it) |
CA (1) | CA2254764A1 (it) |
IT (1) | IT1282752B1 (it) |
NO (1) | NO985374L (it) |
WO (1) | WO1997045686A1 (it) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1317809B1 (it) * | 2000-06-06 | 2003-07-15 | Sgm Spa | Essiccatore in continuo a magneti permanenti con regolazione delprofilo trasversale di temperatura |
WO2003053103A1 (fr) * | 2001-12-19 | 2003-06-26 | Nippon Magnetics Inc., | Appareil de chauffage utilisant de la chaleur generee par courant de foucault |
AT500219B1 (de) * | 2003-05-22 | 2007-11-15 | Masterfoods Austria Ohg | Verfahren und vorrichtung zur wärmebehandlung von nahrungsmitteln bzw. futtermitteln, insbesondere zur herstellung von backwaren, wie waffelprodukten |
JP3955888B2 (ja) * | 2003-12-12 | 2007-08-08 | トック・エンジニアリング株式会社 | 永久磁石式渦電流加熱装置 |
JP2006236856A (ja) * | 2005-02-25 | 2006-09-07 | Tok Engineering Kk | 金属製缶の加熱装置 |
SG10201502704VA (en) * | 2015-04-07 | 2016-11-29 | Singnergy Corp Pte Ltd | Apparatus and method for improved evaporation drying |
CN107543396A (zh) * | 2017-08-23 | 2018-01-05 | 深睡(天津)科技发展有限公司 | 一种新型纺织烘干设备及其使用方法 |
CN108036620A (zh) * | 2017-11-30 | 2018-05-15 | 彭素珍 | 一种纺织棉纱烘干机 |
WO2021243474A1 (en) * | 2020-06-05 | 2021-12-09 | 4 Symbioses Inc | Apparatus for drying sludge and method |
CN112284106A (zh) * | 2020-10-27 | 2021-01-29 | 常熟市全申化纤有限公司 | 一种涤纶丝连续式烘干机构 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2301589A (en) * | 1940-06-05 | 1942-11-10 | Shepard William Gillard | Drying of fruit pulp |
FR2461426A1 (fr) * | 1979-07-09 | 1981-01-30 | Cem Comp Electro Mec | Dispositif de chauffage par induction de produits longs et minces en defilement continu |
DE3033482C2 (de) * | 1980-09-05 | 1983-06-23 | Kleinewefers Gmbh, 4150 Krefeld | Walze mit elektromagnetischer Heizung |
IT1144234B (it) * | 1981-06-16 | 1986-10-29 | Belot Italia Spa | Apparecchiatura per il riscaldamento della parete cilindrica di un cilindro rotante di una macchina per la fabbricazione della carta |
-
1996
- 1996-05-29 IT IT96MI001079A patent/IT1282752B1/it active IP Right Grant
-
1997
- 1997-05-28 EP EP97922003A patent/EP0901600A1/en not_active Withdrawn
- 1997-05-28 CA CA002254764A patent/CA2254764A1/en not_active Abandoned
- 1997-05-28 WO PCT/IB1997/000644 patent/WO1997045686A1/en not_active Application Discontinuation
- 1997-05-28 AU AU27863/97A patent/AU2786397A/en not_active Abandoned
- 1997-05-28 JP JP09541940A patent/JP2000511270A/ja active Pending
-
1998
- 1998-11-19 NO NO985374A patent/NO985374L/no unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9745686A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2254764A1 (en) | 1997-12-04 |
ITMI961079A1 (it) | 1997-11-29 |
NO985374D0 (no) | 1998-11-19 |
NO985374L (no) | 1998-11-19 |
JP2000511270A (ja) | 2000-08-29 |
WO1997045686A1 (en) | 1997-12-04 |
IT1282752B1 (it) | 1998-03-31 |
ITMI961079A0 (it) | 1996-05-29 |
AU2786397A (en) | 1998-01-05 |
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Legal Events
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17Q | First examination report despatched |
Effective date: 20001127 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20001201 |