AU606098B2 - Drying or baking apparatus - Google Patents
Drying or baking apparatus Download PDFInfo
- Publication number
- AU606098B2 AU606098B2 AU81648/87A AU8164887A AU606098B2 AU 606098 B2 AU606098 B2 AU 606098B2 AU 81648/87 A AU81648/87 A AU 81648/87A AU 8164887 A AU8164887 A AU 8164887A AU 606098 B2 AU606098 B2 AU 606098B2
- Authority
- AU
- Australia
- Prior art keywords
- perforated
- conveyor
- drying
- air
- drying apparatus
- 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.)
- Ceased
Links
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
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
- F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Description
11.4 1.6 UUO,-7 Cr,1 L zA xMAnsjbdouw|j!q6JOp:qo zAXMAnisIodONW1NIriHo-(Dav
K,,
'Id 01 11111 1.25 14 1.
o iri l r i l II I 1 li
T
A
i l COMMONWEALTH OF AUSOLIy PATENTS ACT 1952 COMPLETE SPECIFICATION FOR OFFICE USE Form Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: TO BE COMPLETED BY APPLICANT Name of Applicant: GREENBANK ENGINEERING GROUP
LIMITED
Address of Applicant: Gate Street, Blackburn, LANCASHIRE BBI 3AJ, ENGLAND Actual Inventor: William Ernest Soltau and Thomas Fryars Address for Service: GRIFFITH HASSEL FRAZER 71 YORK STREET SYDNEY NSW 2000
AUSTRALIA
Complete Specification for the invention entitled: DRYING OR BAKING APPARATUS The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5732A:rk TO: THE COMMISSIONER OF PATENTS COMMONWEALTH OF AUSTRALIA 5732A:rk 5732A:rk LODGED AT SUB-OFFICE N ACCEPTED AID AMENDMENTS 2 OV .g Sydne ALLO W'ED A IM -1IA- DRYING OR BAKING APPARATUS This invention relates to drying or baking apparatus especially but not exclusively for drying or baking granular or pelletised materials, for example, foodstuffs, or other materials in continuous or discrete form, for example, permeable textile fabric in web form, and loose stock such as wool.
A known form of suction drying apparatus comprises a drying chamber subdivided into two compartments by an air and/or other gaseous (usually air) permeable conveyor, the compartments being connected by ducting incorporating, or having associated therewith, a suction fan, an air heating means and a fresh air inlet usually incorporating, or *9 being disposed adjacent to, the air heating means which may be electric, gas-fired, oil-fired, or steam.
j In use material to be dried, and hereinafter and in the claims for convenience reference is made to granular material, is conveyed through the drying 't chamber on the permeable conveyor and heated air is continuously sucked through the granular material and conveyor to remove moisture from the granular Smaterial, the moisture-containing air being circulated back to the heating means to re'store its temperature, part of the air usually being bled off and replenish.d with fresh dry air.
An example of such a suction drying apparatus is disclosed in our Patent GB 1191488.
-it is also known in the drying art to provide a radio frequency field in the region through which material to be dried is passed. The heating provided by such a radio frequency field heats any moisture contained in the material and drives it to the Ssurface of the material.
6691A/liz 2 -2- It is an object of the present invention to provide a drying apparatus which combines the advantageous features of both the above drying apparatus and which is also usable in the field of baking. Reference hereinafter and in the claims to "drying" is therefore to be construed as including "baking".
According to the present invention there is provided a drying apparatus comprising a drying chamber divided into two compartments by a metal air-pervious conveyor means for granular material to be dried and with the compartments being connected by ducting therewith, suction fan means and air heating means whereby healed air is sucked through the granular material and the supporting metal conveyor means to dry the granular material, and the apparatus being characterised by a perforated electrode structure within the drying chamber parallel with and spaced from the granular material-supporting metal surface of the air-pervious conveyor means, and balanced field radio frequency heating means connected to the perforated electrode structure and the air-pervious metal conveyor means which serves as the other electrode of the radio frequency heating means, whereby a radio frequency heating means is provided so that the granular material is subjected both to internal and surface heating to cause internal moisture within the granular material to be moved to the surface of the granular material for removal by the heated air flow through the granular material.
The perforated electrode structure may be a continuous perforated plate or it may be a plurality, of discrete mutually spaced electrodes, the perforations or inter-electrode spaces being dimensioned to ensure that there is no jet impingement effect by the heated air passing therethrough on the granular material.
The air-pervious conveyor means may be a continuous slatted conveyor, the slats being suitably perforated or formed of openwork material, a 4'' LC^ i ^1 t I -3perforated or open mesh flexible metallic belt or a non-metallic belt running over a fixed perforated metal plate.
The suction drying apparatus according to this invention has a substanti~ally greater drying effectiveness than known suction drying apparatuz.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying diagrammatic drawing of a longitudinal section through a suction drying apparatus.
The suction drying apparatus employs air as the main drying medium and comprises a drying chamber divid~ed into upper and lower compartments 11 and 12 by an endless conveyor 13 for supporting and conveying qranular material (not shown) into and out of the drying chamber 10. The compartments 11 and 12 are connected by ducting 14 incorporating a suction or circulatory fan 15. An a.'r-heatlng means 16, say gas-fired, is incorporated in an air inlet duct 17 for fresh air at the other end of the chamber Part of the moisture-laden air passing through the duct 14 is vented to atmosphere through an exhaust duct 3.8.
The suction drying apparatus is illustrated diagrammatically and it is to be understood that a separate suction fan 18A is associated with the exhaust duct 18 to vent moisture-laden air only to atmosphere, i.e. fresh heated air which has not yet done work in passing through the granular material on the endless conveyor 13 is not vented to atmosphere.
The disposition and arrangement of the inflow fan and the venting fan 18A relative to the drying chamber 10 and endless conveyor 13 is well known to those skilled in the drying art and consequently I -4- 4 needs no detailed description or illustration.
The drying chamber 10 has an inlet and an outlet for ingress and egress of the conveyor 13 and the granular met er ial1, and attenuation ducts 19 are provided at the inlet and outlet for a purpose referred to later.
The endless conveyor 13 is a driven metal slatted conveyor with the slats being of perforated or open mesh construction and being movably supported externally of the chamber 10 by sprocket wheels or pulleys 20, one of which (see 20A) at least is driven.
The conveyor 13 forms one electrode of a radio frequency heating means comprising a radio frequency generator 21 and whereof the second electrode is a perforated plate 22 above and parallel with the conveyor 13 and connected to the drying chamber walls via suitable insulation 23.
The at,tenuation ducts 19 serve the purpose of preventing the escape of radio frequency energy.
TChe radio frequency may be either a balanced feed or a coaxial fo~ed arrangement as is well known to those skilled in the art.
The perforations in the perforated plate electrode 22 and in the conveyor 13 are dimensioned to ensure that there is a free flow of heated air through same and the granular material on the endless conveyor 13 without any impingement effect resulting from the perforated plate electrode 22 or the endless conveyor 13.
F~resh heated air is sucked into the compartment 12 of the chamber 10 via the duct 17 by the suction fan 15 while moisture-laden air is vented through the exhaust duct 18 as aforesaid.
In use, therefore, granular material conveyed through the drying chamber .10 is subjected to the combined action of heated air being sucked therethrough and the internal heating effected by the radio frequency field which causes internal moisture to be heated and to move to the surface of the granular material where it is pulled off by the heated air flow.
Instead of a perforated slatted conveyor, there may be employed a perforated vibratory trough conveyor, or a drag link conveyor operating over a fixed perforated plate.
4 S 4 4 a* 0 4 **49 99.* 06 4 4 0 19 be
Claims (3)
- 2. A drying apparatus according to claim 1, which the perforated electrode structure is a continuous perforated plate or it may be a plurality of discrete mutually spaced electrodes, the perforations or inter-electrode spaces being dimensioned to ensure that there is no jet impingement effect by the heated air passing therethrough on the granular material.
- 3. A drying apparatus as claimed in claim 1 or claim 2, in which the air-pervious conveyor means is a continuous slatted conveyor, the slats being perforated or formed of openwork material, a perforated or open mesh flexible metallic belt or a non-metallic belt running over a fixed perforated metal plate, or a perforated vibratory trough conveyor or a drag link conveyor operating over a j /,I 7 fixed perforated plate.
- 4. A drying apparatus as claimed in any one of claims 1 to 3, in which the air-pervious conveyor means passes in and out of the drying chamber through attenuation ducts which serve to prevent escape of radio frequency energy. A drying apparatus substantially as hereinbefore described with reference to the accompanying drawing. Dated this 24th day of November 1987 GREENBANK ENGINEERING GROUP LIMITED By their Patent Attorney GRIFFITH HASSEL FRAZER
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB868628138A GB8628138D0 (en) | 1986-11-25 | 1986-11-25 | Suction drying apparatus |
| GB8628138 | 1986-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU8164887A AU8164887A (en) | 1988-05-26 |
| AU606098B2 true AU606098B2 (en) | 1991-01-31 |
Family
ID=10607890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU81648/87A Ceased AU606098B2 (en) | 1986-11-25 | 1987-11-24 | Drying or baking apparatus |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0269358A3 (en) |
| AU (1) | AU606098B2 (en) |
| GB (1) | GB8628138D0 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6852957B2 (en) | 2002-06-28 | 2005-02-08 | Kerry Group Services International, Ltd. | Breadcrumb processing line and method |
| DE102004056795B4 (en) * | 2004-11-24 | 2006-10-12 | Lindauer Dornier Gmbh | Multi-day microwave continuous dryers for plate-shaped products, in particular fibreboards |
| CN101856649B (en) * | 2010-06-25 | 2013-03-20 | 南通凯迪自动机械有限公司 | Airtight box system for vertical gluing machine |
| US9541330B2 (en) | 2013-07-17 | 2017-01-10 | Whirlpool Corporation | Method for drying articles |
| US20150047218A1 (en) | 2013-08-14 | 2015-02-19 | Whirlpool Corporation | Appliance for drying articles |
| US9784499B2 (en) | 2013-08-23 | 2017-10-10 | Whirlpool Corporation | Appliance for drying articles |
| US9410282B2 (en) | 2013-10-02 | 2016-08-09 | Whirlpool Corporation | Method and apparatus for drying articles |
| US9645182B2 (en) | 2013-10-16 | 2017-05-09 | Whirlpool Corporation | Method and apparatus for detecting an energized E-field |
| US9546817B2 (en) | 2013-12-09 | 2017-01-17 | Whirlpool Corporation | Method for drying articles |
| CN103822442B (en) * | 2014-02-17 | 2015-09-02 | 河南科技大学 | The drying means of a kind of honeysuckle |
| US9605899B2 (en) | 2015-03-23 | 2017-03-28 | Whirlpool Corporation | Apparatus for drying articles |
| US10906871B2 (en) | 2016-08-02 | 2021-02-02 | Dermira, Inc. | Processes for making, and methods of using, glycopyrronium compounds |
| CN107036420A (en) * | 2017-04-27 | 2017-08-11 | 安徽机电职业技术学院 | A kind of tealeaves, medicinal material, flowers dryer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU489106B2 (en) * | 1972-04-11 | 1974-09-26 | Kanebo Ltd | Process and apparatus for drying porous material |
| AU470431B2 (en) * | 1971-10-25 | 1976-03-18 | The Electricity Council | Improvements in or relating tothe drying of wool slivers |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1191488A (en) * | 1967-07-13 | 1970-05-13 | Greenbank Engineering Company | Improvements in Suction Drying Apparatus. |
| US4430806A (en) * | 1981-11-10 | 1984-02-14 | Hopkins Harry C | Microwave agricultural drying and curing apparatus |
| GB2123537B (en) * | 1982-05-17 | 1985-10-02 | Electricity Council | Convective drying |
| DE3320225A1 (en) * | 1983-06-03 | 1984-12-06 | Siemens AG, 1000 Berlin und 8000 München | CAPACITIVE HIGH FREQUENCY CONTINUOUS |
-
1986
- 1986-11-25 GB GB868628138A patent/GB8628138D0/en active Pending
-
1987
- 1987-11-18 EP EP87310155A patent/EP0269358A3/en not_active Withdrawn
- 1987-11-24 AU AU81648/87A patent/AU606098B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU470431B2 (en) * | 1971-10-25 | 1976-03-18 | The Electricity Council | Improvements in or relating tothe drying of wool slivers |
| AU489106B2 (en) * | 1972-04-11 | 1974-09-26 | Kanebo Ltd | Process and apparatus for drying porous material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0269358A3 (en) | 1989-08-30 |
| GB8628138D0 (en) | 1986-12-31 |
| AU8164887A (en) | 1988-05-26 |
| EP0269358A2 (en) | 1988-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU606098B2 (en) | Drying or baking apparatus | |
| US5702245A (en) | Conveyor for processing equipment having gas flow compensation | |
| US4074441A (en) | Rotary through dryer having multiple vacuum chambers and associated heaters | |
| US7316080B1 (en) | Methodology and apparatus to reduce fuel consumption in conveyor dryers and ovens | |
| US4504222A (en) | Screw conveyer and furnace | |
| US5243962A (en) | Cooking oven for slow-cooking of food products | |
| EP1797758A2 (en) | Continuous cooking oven system | |
| US5233763A (en) | Sludge drying apparatus | |
| US5396716A (en) | Jet tube dryer with independently controllable modules | |
| US2799096A (en) | Onion drying apparatus and method | |
| US2908234A (en) | Bakers' and the like ovens | |
| US2732627A (en) | Drying apparatus for alimentary paste of | |
| US4523390A (en) | Peripheral exhaust system for high velocity dryer | |
| US2101301A (en) | Method and apparatus for drying cellulose and like material in a continuous web | |
| US4295284A (en) | Dryer range | |
| US1515596A (en) | Drying machine | |
| US2415738A (en) | Endless conveyor drier structure | |
| JPS6030382B2 (en) | Zone heat treatment equipment | |
| US1670263A (en) | Tobacco-curing device | |
| JPH0849972A (en) | Drier for powdered tea to be presented | |
| SU553421A2 (en) | Multizone dryer for fibrous materials | |
| US3568331A (en) | Suction drying apparatus | |
| US847038A (en) | Drying-machine. | |
| US1231594A (en) | Drier, cooker, and baker for foods. | |
| US2010917A (en) | Apparatus for continuously drying fiber boards |