GB1268263A - Method for vacuum dehydration and apparatus therefor - Google Patents
Method for vacuum dehydration and apparatus thereforInfo
- Publication number
- GB1268263A GB1268263A GB1538269A GB1538269A GB1268263A GB 1268263 A GB1268263 A GB 1268263A GB 1538269 A GB1538269 A GB 1538269A GB 1538269 A GB1538269 A GB 1538269A GB 1268263 A GB1268263 A GB 1268263A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- carrier
- tubes
- valve
- loaded
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/40—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution
- A23L3/54—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution using irradiation or electrical treatment, e.g. ultrasonic waves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/042—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying articles or discrete batches of material in a continuous or semi-continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Nutrition Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Drying Of Solid Materials (AREA)
Abstract
1,268,263. Drying apparatus. I.F.C. CORP. 24 March, 1969, No. 15382/69. Heading F4G. A method of vacuum dehydration comprises the steps of, placing the material to be treated in a carrier between electrically conductive plates; sealing the loaded carrier in a chamber of dielectric material; reducing the pressure therein; heating the plates by induction heating. In the preferred embodiment the carrier is a series of vertical, spaced aluminium plates (35), the floor of the carrier being formed by spacers (38), Fig. 5, not shown. The plates may be either square with the corners removed (Fig. 7, not shown) to receive cakes of solid material, e.g. fish, meat, or round with a segment removed at the top (Fig. 6, not shown) to receive pre-frozen liquid or powdered material, e.g. coffee. Such material is loaded into the carrier by rams (52), Fig. 9, not shown, whereas the cakes of solid matter are inserted individually between the plates. The carriers are then loaded into tubes of glass or other insulating material which are then sealed by cover-plates 55. The tubes 10, which may be lined with P.T.F.E. have a single, or two parallel induction windings of insulated copper or aluminium wire or tubing 14 wound thereon. Valve 23 is then opened establishing a vacuum in the tubes 10, shock to the material is prevented by bleeder line and valve 56. The induction heating is then switched on, the apparatus may be operated either at high frequency or mains frequency. For H.F. operation tubing is used for the windings 14 and cooling water is circulated therethrough. The temperature of the material is sensed by thermocouples 17 which control the power supply via switch 19 for H.F. operation or via toroidal voltage regulators for mains frequency operation. During heating the water vapour evolved is drawn off through the vacuum manifold 24 into the condenser 26 where it freezes on the condenser plates. There may be two condensers 26 one of which is in operation while the other is defrosted. At the completion of the predetermined drying cycle valve 23 is closed and valve 25 opened introducing nitrogen or another relatively inert gas at atmospheric pressure into the tubes 10. The cover-plates 55 are removed and the carriers which may be coated with P.T.F.E. are emptied.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1538269A GB1268263A (en) | 1969-03-24 | 1969-03-24 | Method for vacuum dehydration and apparatus therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1538269A GB1268263A (en) | 1969-03-24 | 1969-03-24 | Method for vacuum dehydration and apparatus therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1268263A true GB1268263A (en) | 1972-03-29 |
Family
ID=10058171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1538269A Expired GB1268263A (en) | 1969-03-24 | 1969-03-24 | Method for vacuum dehydration and apparatus therefor |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1268263A (en) |
-
1969
- 1969-03-24 GB GB1538269A patent/GB1268263A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3192643A (en) | Apparatus for regulating freeze-drying operations | |
US2442114A (en) | Method of and apparatus for subjecting materials to a radio-frequency field | |
GB1093449A (en) | Method and apparatus for continuous freeze dryer | |
US3883958A (en) | Method and apparatus for accelerated freeze drying | |
GB1056985A (en) | Improvements in or relating to cathode sputtering apparatus | |
US3154663A (en) | Apparatus and process for thawing temperature sensitive frozen materials | |
GB1268263A (en) | Method for vacuum dehydration and apparatus therefor | |
US2546983A (en) | Container | |
GB1354359A (en) | Method and packaging for preparing packaged food products | |
GB1318141A (en) | Sputtering apparatus | |
US3815251A (en) | Method for vacuum dehydration | |
US2990286A (en) | Method of storing prepared foods | |
GB963473A (en) | Improvements in or relating to drying foodstuffs for subsequent rehydration | |
JPS5691436A (en) | Method for heating semiconductor substrate | |
US2149447A (en) | Furnace for treating materials at high temperatures | |
GB950139A (en) | Cooling arrangements for electron tubes | |
GB1155081A (en) | Improvements in Packaging | |
US2605554A (en) | Process for the desiccation of labile aqueous materials | |
US3846574A (en) | Method of heating objects and device for the performance of the method | |
US3498209A (en) | System for dehydrating food or the like | |
GB1371817A (en) | Method and apparatus for the preparation of precooked meat products | |
GB1052793A (en) | ||
FR2041877A5 (en) | Vacuum dehydration method for processing - food products | |
US2456968A (en) | Process for outgassing photocells containing antimony | |
US3455031A (en) | Method for vacuum dehydration and apparatus therefor |