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1. WO2000042371 - A METHOD AND APPARATUS FOR MICROWAVE PROCESSING OF PLANAR MATERIALS

Publication Number WO/2000/042371
Publication Date 20.07.2000
International Application No. PCT/AU2000/000012
International Filing Date 11.01.2000
Chapter 2 Demand Filed 10.08.2000
IPC
F26B 3/347 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
3Drying solid materials or objects by processes involving the application of heat
32by development of heat within the materials or objects to be dried
34by using electrical effects
347Electromagnetic heating, e.g. induction heating or heating using microwave energy
F26B 5/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
5Drying solid materials or objects by processes not involving the application of heat
04by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
F26B 21/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
21Arrangements for supplying or controlling air or gases for drying solid materials or objects
06Controlling, e.g. regulating, parameters of gas supply
CPC
F26B 21/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
21Arrangements ; or duct systems, e.g. in combination with pallet boxes,; for supplying and controlling air or gases for drying solid materials or objects
06Controlling, e.g. regulating, parameters of gas supply
F26B 3/347
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
3Drying solid materials or objects by processes involving the application of heat
32by development of heat within the materials or objects to be dried ; , e.g. by fermentation or other microbiological action
34by using electrical effects
347Electromagnetic heating, e.g. induction heating or heating using microwave energy
F26B 5/048
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
5Drying solid materials or objects by processes not involving the application of heat
04by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
048in combination with heat developed by electro-magnetic means, e.g. microwave energy
Applicants
  • MICROWAVE PROCESSING TECHNOLOGIES PTY. LIMITED [AU/AU]; Unit 9 8-10 Morton Street Wollstonecraft, NSW 2065, AU (AllExceptUS)
  • THOMAS, Donald, S. [AU/AU]; AU (UsOnly)
Inventors
  • THOMAS, Donald, S.; AU
Agents
  • SPRUSON & FERGUSON; G.P.O. Box 3898 Sydney, NSW 2001, AU
Priority Data
PP 808411.01.1999AU
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A METHOD AND APPARATUS FOR MICROWAVE PROCESSING OF PLANAR MATERIALS
(FR) PROCEDE ET APPAREIL DE TRAITEMENT DE MATERIAUX PLATS AUX MICRO-ONDES
Abstract
(EN)
A process and apparatus for removing moisture from a material without substantially spoiling the material are described. The process comprises: a) subjecting the material to a controlled humidity environment, said environment being at a temperature and partial vapour pressure of water which do not spoil the material, and, in which the partial vapour pressure of water of said environment is substantially below saturation; b) irradiating at least one selected area of the material in the environment with an amount of microwave irradiation effective to increase the moisture at the surface of the material whereby the partial vapour pressure of water at the surface of the material is greater than the partial vapour pressure of water of the environment whereby moisture is transferred from the surface to the environment, wherein the amount of said microwave irradiation and the selected area which is irradiated do not spoil the material; and c) maintaining (i) the temperature of the environment, and, (ii) the partial vapour pressure of water of said environment substantially below saturation, whereby the material is not spoiled during step (b); said amount of microwave irradiation being sufficient to substantially maintain said vapour pressure at the surface of the material, until a required amount of moisture has been removed from said material, without substantially reducing the surface temperature of the material and being sufficient to maintain the surface temperature of the material at substantially the same temperature as the dry bulb temperature of the environment.
(FR)
L'invention concerne un procédé et un appareil permettant de retirer l'humidité d'un matériau sans sensiblement le détériorer. Le procédé consiste à : a) soumettre le matériau à un environnement à humidité régulée, environnement ayant une température et une pression partielle de vapeur d'eau qui ne détériorent pas le matériau, et dans lequel la pression partielle de vapeur d'eau est sensiblement inférieure au point de saturation ; b) irradier au moins une zone déterminée du matériau soumis audit environnement avec une force d'irradiation aux micro-ondes suffisante pour augmenter l'humidité à la surface du matériau, la pression partielle de vapeur d'eau à la surface du matériau étant ainsi supérieure à celle de l'environnement ; cette force d'irradiation aux micro-ondes ainsi que ladite zone irradiée ne détériorent pas le matériau ; c) maintenir (I) la température de l'environnement, et (II) la pression partielle de vapeur d'eau dudit environnement sensiblement au-dessous du point de saturation, évitant ainsi la détérioration du matériau durant l'étape b), cette force d'irradiation aux micro-ondes étant suffisante pour maintenir ladite pression de vapeur à la surface du matériau, jusqu'à ce qu'une quantité requise d'humidité ait été retirée dudit matériau, sans sensiblement réduire la température de surface du matériau. La force d'irradiation est également suffisante pour maintenir la température de surface du matériau à sensiblement la même que la température à sec de l'environnement.
Also published as
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