EP0272854A2 - Dispositif de séchage à convection - Google Patents

Dispositif de séchage à convection Download PDF

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Publication number
EP0272854A2
EP0272854A2 EP87310921A EP87310921A EP0272854A2 EP 0272854 A2 EP0272854 A2 EP 0272854A2 EP 87310921 A EP87310921 A EP 87310921A EP 87310921 A EP87310921 A EP 87310921A EP 0272854 A2 EP0272854 A2 EP 0272854A2
Authority
EP
European Patent Office
Prior art keywords
dried
hot gas
boxes
housings
perforated
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Withdrawn
Application number
EP87310921A
Other languages
German (de)
English (en)
Other versions
EP0272854A3 (fr
Inventor
William Ernest Soltau
Richard Edge
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.)
GREENBANK ENGINEERING GROUP Ltd
Greenbank Engineering Co Ltd
Original Assignee
GREENBANK ENGINEERING GROUP Ltd
Greenbank Engineering Co Ltd
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 GREENBANK ENGINEERING GROUP Ltd, Greenbank Engineering Co Ltd filed Critical GREENBANK ENGINEERING GROUP Ltd
Publication of EP0272854A2 publication Critical patent/EP0272854A2/fr
Publication of EP0272854A3 publication Critical patent/EP0272854A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection

Definitions

  • This invention relates to convective drying apparatus or ovens (hereinafter and in the claims for convenience simply referred to as “apparatus”) in which heated air or other gas is directed onto material to be dried, processed, cooked or baked (hereinafter and in the claims for convenience simply referred to as “dried").
  • Patent Specification GB 2123537B (The Electricity Council) there is disclosed a hot gas convective dryer having a plurality of jets or nozzles for directing a heated gas onto material passed between the jets or nozzles wherein the jets or nozzles are formed of electrically conductive material and are arranged to constitute the electrodes or at least some of the electrodes of radio frequency heating means providing a radio frequency field in the region through which the material to be dried is passed.
  • the electrodes of the radio frequency heating means are discrete separate nozzle boxes incorporating the nozzles or jets for directing heated air or other gas onto the material to be dried, for example a fabric web.
  • a hot gas convective drying apparatus comprising a plurality of nozzles or a delivery chamber for directing hot gas onto the material to be dried and radio frequency heating means adapted to create a radio frequency field in the region through which the material to be dried travels, the drying apparatus being characterised in that the electrode means of the radio frequency heating means comprise a pair of spaced perforated plates between which the material to be dried passes and with which are associated the hot gas directing nozzles or chambers, or in that the electrode means of the radio frequency heating means comprises a single perforated plate with an opposed array of individual nozzle boxes incorporating hot gas directing nozzles.
  • each perforated electrode plate includes a plurality of boxes or housings each with rows of nozzle perforations.
  • the nozzle perforations in each perforated electrode plate are smaller in area than the perforations in the perforated electrode plate in the regions of the latter between the nozzle boxes or housings.
  • each respective perforated electrode plate may be staggered relative to the nozzle boxes or housings in the other perforated electrode plate, or may be in line depending upon the nature of the material to be dried.
  • the apparatus is used to dry moist material susceptible to dielectric heating by means of radio waves, such, for example, as fabric or paper webs or discrete items of material or foodstuff carried on a suitable conveyor system.
  • the conveyed material to be dried indicated at 10 in Fig. 1 passes between two perforated plates 11, 12 which constitute the electrodes of a radio frequency heating means, the perforated plates 11, 12 being connected to a radio frequency generator 13.
  • the radio frequency may be either a balanced feed or a coaxial feed arrangement as is well known to those skilled in the art.
  • the plates 11, 12 have respectively connected thereto housings or boxes 14, 15, the housings or boxes 14 being in staggered relationship to the housings or boxes 15, the perforated plates 11, 12 and nozzle housings or boxes 14, 15 being disposed with a drying enclosure 16.
  • Each housing or box 14, 15 has nozzle perforations 17 for directing heated pressurised air onto the material 10 (see arrows 18).
  • the nozzle housings or boxes 14, 15 are connected by suitable ducts 19 to an air circulating fan and heater 20, which may be located either within the drying enclosure 16 or external thereof.
  • the perforated electrode plates 11, 12 have, as aforesaid, nozzle perforations 17 from the housings or boxes 14, 15 and these are smaller in area than perforations 21 in the areas of the perforated electrode plates 11, 12 between the nozzle housings or boxes 14, 15, the larger perforations 21 facilitating return of air (moisture-bearing air) from the vicinity of the material 10 back into the air circulating fan and heater 20, a proportion of this air being exhausted through an outlet duct 22 incorporating a suction fan (not shown).
  • each perforated plate 11A, 12A with its associated housings or boxes 14A, 15A forms one wall of an air delivery chamber 23, the air flow, in this instance, being from the air supply fan and heater 20A into chambers 23, through the perforations in the plates 11A, 12A for impingement against the material 10A and return into the housing or boxes 14A, 15A and from open ends thereof into the drying enclosure 16A for return to the air supply fan and heater 20A with a proportion thereof exhausting through outlet duct 22A under the action of its associated suction fan (not shown).
  • the perforations in the plates 11A, 12A may be larger than those in the plates between the housings or boxes 14A, 15A.
  • the air is externally ducted to exhaust after impingement with the material to be dried, i.e. it is not returned into the drying enclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
EP87310921A 1986-12-15 1987-12-11 Dispositif de séchage à convection Withdrawn EP0272854A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8629882 1986-12-15
GB868629882A GB8629882D0 (en) 1986-12-15 1986-12-15 Convective drying apparatus

Publications (2)

Publication Number Publication Date
EP0272854A2 true EP0272854A2 (fr) 1988-06-29
EP0272854A3 EP0272854A3 (fr) 1989-11-02

Family

ID=10609012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310921A Withdrawn EP0272854A3 (fr) 1986-12-15 1987-12-11 Dispositif de séchage à convection

Country Status (2)

Country Link
EP (1) EP0272854A3 (fr)
GB (1) GB8629882D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388990A2 (fr) 1986-02-20 1990-09-26 RAYCHEM CORPORATION (a Delaware corporation) Méthode et articles utilisant un matériau échangeur d'ions
US5659972A (en) * 1995-10-06 1997-08-26 Avery Dennison Corporation Apparatus and method for drying or curing web materials and coatings
WO2009155889A1 (fr) * 2008-06-23 2009-12-30 Prinovis Ltd. & Co. Kg Installation de séchage pour bandes de matière continues sous forme de bandes de papier imprimées et/ou enduites
CN115672692A (zh) * 2021-07-30 2023-02-03 宁德时代新能源科技股份有限公司 烘干装置及涂布设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB914546A (en) * 1959-08-20 1963-01-02 Basf Ag Apparatus for the thermal treatment and/or reaction of materials in a high-frequencyfield
GB2123537A (en) * 1982-05-17 1984-02-01 Electricity Council Convective drying

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB914546A (en) * 1959-08-20 1963-01-02 Basf Ag Apparatus for the thermal treatment and/or reaction of materials in a high-frequencyfield
GB2123537A (en) * 1982-05-17 1984-02-01 Electricity Council Convective drying

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388990A2 (fr) 1986-02-20 1990-09-26 RAYCHEM CORPORATION (a Delaware corporation) Méthode et articles utilisant un matériau échangeur d'ions
US5659972A (en) * 1995-10-06 1997-08-26 Avery Dennison Corporation Apparatus and method for drying or curing web materials and coatings
EP0853748A1 (fr) * 1995-10-06 1998-07-22 Avery Dennison Corporation Appareil et procede de sechage ou de durcissement de materiaux et de revetements sous forme de bande
US5813134A (en) * 1995-10-06 1998-09-29 Avery Dennison Corporation Apparatus and method for drying or curing web materials and coatings
EP0853748A4 (fr) * 1995-10-06 1999-09-15 Avery Dennison Corp Appareil et procede de sechage ou de durcissement de materiaux et de revetements sous forme de bande
US5981022A (en) * 1995-10-06 1999-11-09 Avery Dennison Corporation Apparatus and method for drying or curing web materials and coatings
WO2009155889A1 (fr) * 2008-06-23 2009-12-30 Prinovis Ltd. & Co. Kg Installation de séchage pour bandes de matière continues sous forme de bandes de papier imprimées et/ou enduites
CN115672692A (zh) * 2021-07-30 2023-02-03 宁德时代新能源科技股份有限公司 烘干装置及涂布设备
US12085335B2 (en) 2021-07-30 2024-09-10 Contemporary Amperex Technology Co., Limited Oven drying apparatus and coating device

Also Published As

Publication number Publication date
EP0272854A3 (fr) 1989-11-02
GB8629882D0 (en) 1987-01-28

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Inventor name: EDGE, RICHARD

Inventor name: SOLTAU, WILLIAM ERNEST