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1. WO1998037371 - METHOD AND EQUIPMENT FOR DRYING AN OBJECT INCLUDING WATER

Publication Number WO/1998/037371
Publication Date 27.08.1998
International Application No. PCT/FI1998/000151
International Filing Date 19.02.1998
Chapter 2 Demand Filed 10.09.1998
IPC
F26B 5/02 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
02by using ultrasonic vibrations
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 21/08 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
08Humidity
F26B 21/14 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
14using gases or vapours other than air or steam
CPC
F26B 21/086
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
08Humidity
086by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
F26B 21/14
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
14using gases or vapours other than air or steam ; , e.g. inert gases
F26B 2210/16
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
26DRYING
BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
2210Drying processes and machines for solid objects characterised by the specific requirements of the drying good
16Wood, e.g. lumber, timber
F26B 5/02
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
02by using ultrasonic vibrations
F26B 5/04
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
Applicants
  • LVI-INSINÖÖRITOIMISTO KEIJO SAARENPÄÄ [FI]/[FI] (AllExceptUS)
  • SAARENPÄÄ, Keijo [FI]/[FI] (UsOnly)
Inventors
  • SAARENPÄÄ, Keijo
Agents
  • LAURINOLLI, Tapio
Priority Data
97072721.02.1997FI
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND EQUIPMENT FOR DRYING AN OBJECT INCLUDING WATER
(FR) PROCEDE ET MATERIEL POUR SECHER UN OBJET CONTENANT DE L'EAU
Abstract
(EN)
In the method for drying an object, e.g. timber or reindeer meat, low-pressure gas mixture, which essentially consists of nitrogen and water vapour, is circulated (207) effectively via the space (202) surrounding the object (203). The method includes cycles, in which during a first phase (101a) the gas mixture is heated effectively within the circulation for heating the object, and during a second phase the gas mixture leaving the space (202) is within the circulation first cooled (204) for condensing and removing water therefrom and for removing (205) the water from the circulation and then heated back (206) to a suitable temperature below the temperature of the object before the gas mixture returns back to said space (202). In the equipment accomplishing the method the effective circulation is made possible as well as the effective heating, cooling and drying by means of cooling and heating again. The successive phases and successive cycles formed thereby are controlled and carried out according to certain drying schedules. The drying may be performed rapidly, gently and with a small consumption of energy.
(FR)
Dans ce procédé de séchage d'un objet, par exemple du bois ou de la viande de renne, on fait circuler (207) de manière efficace un mélange gazeux basse pression, composé essentiellement d'azote et de vapeur d'eau, dans l'espace (202) entourant l'objet (203). Ce procédé comprend des cycles consistant, dans une première phase (101a), à chauffer de manière efficace le mélange gazeux circulant, afin de chauffer l'objet et, dans une seconde phase, à refroidir (204) le mélange gazeux quittant l'espace (202), afin de condenser et enlever l'eau du mélange et enlever (205) l'eau du trajet de circulation, puis à chauffer à nouveau (206) le mélange à une température appropriée, inférieure à la température de l'objet, avant que le mélange gazeux ne soit renvoyé dans l'espace (202). Avec le matériel permettant d'exécuter le procédé de l'invention, il a été possible d'obtenir une circulation efficace, de même qu'un chauffage, un refroidissement et un séchage efficaces, grâce aux processus de refroidissement et de chauffage à nouveau. Les phases et cycles successifs ainsi formés sont commandés et exécutés selon certains calendriers de séchage. On peut exécuter ce séchage rapidement, doucement et avec une faible consommation d'énergie.
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