EP3173720B1 - Verfahren und anlage zum trocknen von vakuum-behältern - Google Patents

Verfahren und anlage zum trocknen von vakuum-behältern Download PDF

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Publication number
EP3173720B1
EP3173720B1 EP15196344.4A EP15196344A EP3173720B1 EP 3173720 B1 EP3173720 B1 EP 3173720B1 EP 15196344 A EP15196344 A EP 15196344A EP 3173720 B1 EP3173720 B1 EP 3173720B1
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EP
European Patent Office
Prior art keywords
pressure
enclosure
air
control unit
duration
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.)
Active
Application number
EP15196344.4A
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English (en)
French (fr)
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EP3173720A1 (de
Inventor
Cleison Luis WEBBER
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.)
John Cockerill SA
Original Assignee
Cockerill Maintenance and Ingenierie SA
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 Cockerill Maintenance and Ingenierie SA filed Critical Cockerill Maintenance and Ingenierie SA
Priority to EP15196344.4A priority Critical patent/EP3173720B1/de
Priority to RU2018122773A priority patent/RU2018122773A/ru
Priority to US15/778,650 priority patent/US20180347902A1/en
Priority to JP2018526899A priority patent/JP2018538504A/ja
Priority to PCT/EP2016/078900 priority patent/WO2017089588A1/fr
Priority to EP16808941.5A priority patent/EP3380799A1/de
Publication of EP3173720A1 publication Critical patent/EP3173720A1/de
Application granted granted Critical
Publication of EP3173720B1 publication Critical patent/EP3173720B1/de
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    • 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
    • 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
    • F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction

Definitions

  • the present invention relates to the field of enclosure drying.
  • the enclosure contains objects that hinder the passage of hot air and prevent it from reaching areas of the enclosure and / or objects that will remain wet especially if these areas have a conformation favoring a water accumulation.
  • the use of heat can sometimes damage elements of the enclosure (such as joints) or objects contained therein.
  • An object of the invention is to improve the drying of an enclosure. More specifically, the objective is to evacuate the water from the enclosure as quickly as possible and as completely as possible and, preferably, to be able to guarantee the absence of water in the enclosure by an indirect method.
  • the water contained in the chamber is liquid.
  • the method of the invention makes it possible to vaporize all or almost all the water contained in the chamber without going through a state of water other than steam. It is known that the energy required to pass from the liquid state to the vapor state is less important than the energy required to pass from the solid state to the vapor state for the same amount of liquid. It is recalled that the triple point of the water is obtained at the temperature of 0 ° C and the pressure of 6.01 mbar. For this pair of temperature and pressure, the water present in liquid form will solidify and then sublimate, which is not sought in the method of the invention.
  • the pressure range for vaporizing the water does not require a high level of vacuum and therefore allows the use of a relatively inexpensive and therefore less expensive air extraction technology.
  • the process of the invention is therefore particularly advantageous.
  • the control unit is a computer unit executing a program arranged to implement the drying method according to the invention, once an operator has connected the interior volume of the chamber 8 to the main pipe, to the pipe secondary and to the sensor forming the device for measuring the air pressure in the enclosure 8.
  • the drying process of the invention comprises the following subsequent steps (see figure 2 ).
  • the control unit firstly controls the pump 7 and the valves to extract air from the chamber 8 via the main and secondary lines until a pressure P2 is reached.
  • the pump 7 draws air from the enclosure 8 via the main and secondary pipes.
  • the aspiration by the secondary pipe also allows to drive some of the liquid water that could accumulate in the lower part of the enclosure under the effect of gravity: it will advantageously provide on the secondary pipe a trap to water avoiding that the water in question is brought to the pump.
  • the control unit controls the pump 7 and the valves to initiate a repetition of cycles of rise in pressure up to a pressure P1 and lowering in the vicinity of the pressure P2.
  • This operation is performed by regulating the pressure in the chamber by controlling the pump and / or the valves.
  • the pump 7 draws air from the enclosure 8 via the main pipe.
  • the valve 4 is open, air is introduced into the chamber 8 via the secondary pipe.
  • the introduction of air has two effects: it allows to raise the pressure in the enclosure but also to create in the chamber 8 a flow of air that will sweep the enclosure 8 and promote the evacuation of steam water through the main pipe.
  • pressure P2 and the pressure P1 are within a range of evaporation of the water.
  • the control unit then drives the pump 7 and the valves to interrupt the repetition and control said means for extracting air from the chamber 8 until reaching a third pressure P3 adjacent to the triple point of the water.
  • control unit controls the pump 7 and the valves to return the chamber 8 to the ambient pressure. An operator then disconnects the pressure sensor and the pipes from the enclosure 8.
  • the control unit is arranged to interrupt the drying process when a desired humidity level is reached. This moisture content is not directly measured but evaluated according to the evolution of the pressure in the chamber 8. Several criteria for stopping the drying process are used.
  • the method of the invention here comprises the step, during the extraction of air, of measuring a duration T2 necessary to reach the pressure P1 and of comparing the measured duration T2 with a reference duration tsec necessary to reach the first pressure for a desired humidity level in the enclosure.
  • the repetition of the cycles is started if the measured duration T2 is greater than the reference duration tsec.
  • the chamber 8 is directly returned to the ambient pressure if the measured duration T2 is less than or equal to the tsec reference duration: it is not necessary to repeat the cycles in this case.
  • the control unit is arranged to interrupt the repetition of the cycles when the time ⁇ ti separating two cycles is equal to a reference time ⁇ tsec corresponding to a desired humidity level in the enclosure 8. At the figure 4 , the repetition is interrupted after the cycle 10. In a variant, the control unit is arranged to interrupt the repetition of the cycles when the times ⁇ ti separating several successive cycles are equal to each other.
  • control unit is arranged to interrupt the repetition of the cycles when the slope of descent from the pressure P1 to the pressure P2 is identical to a reference slope corresponding to a desired humidity level in the chamber.
  • the repetition of the cycles is interrupted when the slope of descent from the pressure P1 to the pressure P2 is identical from one cycle to another.
  • the control unit is arranged to start a new repetition of the cycles when, during this rise in pressure since the third pressure P3, the pressure variation ⁇ P after a determined duration is greater than the pressure variation ⁇ Psec for a rate of pressure. desired humidity. If the pressure variation ⁇ P after a determined duration is less than or equal to the pressure variation ⁇ Psec, the control unit controls the pump 7 and the valves to return the chamber 8 to the ambient pressure and complete the process.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Claims (7)

  1. Verfahren zum Trocknen einer Einfassung, umfassend die Schritte:
    - Verbinden der Einfassung mit Mitteln zum Extrahieren und Einführen von Luft und mit einem Messelement zum Messen eines Luftdruckes in der Einfassung,
    - Steuern der genannten Mittel, um Luft aus der Einfassung zu extrahieren, bis ein erster Druck erreicht ist,
    - Steuern der genannten Mittel, um eine Wiederholung von Zyklen einer Druckerhöhung bis auf einen zweiten Druck und einer Drucksenkung bis in die Nähe des ersten Druckes zu starten, wobei der erste Druck und der zweite Druck in einem Verdampfungsbereich von Wasser liegen; gekennzeichnet durch:
    - Unterbrechen der Wiederholung und Steuern der genannten Mittel, um Luft aus der Einfassung zu extrahieren, bis ein dritter Druck nahe dem Tripelpunkt des Wassers erreicht ist,
    - Zurückbringen der Einfassung auf den Umgebungsdruck und Abschalten der genannten Mittel zum Extrahieren und Einführen von Luft.
  2. Verfahren nach Anspruch 1, umfassend während der Extraktion von Luft den Schritt des Messens einer Dauer, die erforderlich ist, um den ersten Druck zu erreichen, und des Vergleichens der gemessenen Dauer mit einer Referenzdauer, die erforderlich ist, um den ersten Druck für einen gewünschten Feuchtigkeitsgehalt in der Einfassung zu erreichen; wobei die Wiederholung der Zyklen gestartet wird, wenn die gemessene Dauer größer als die Referenzdauer ist, und wobei die Einfassung zurück auf den Umgebungsdruck gebracht wird, wenn die gemessene Dauer kleiner oder gleich der Referenzdauer ist.
  3. Verfahren nach Anspruch 1, bei dem die Wiederholung der Zyklen unterbrochen wird, wenn die folgende Bedingung erfasst wird: die Zeit zwischen zwei Zyklen ist gleich einer Referenzzeit, die einem gewünschten Feuchtigkeitsgehalt in der Einfassung entspricht.
  4. Verfahren nach Anspruch 1, bei dem die Wiederholung der Zyklen unterbrochen wird, wenn die folgende Bedingung erfasst wird: das Gefälle von dem zweiten Druck zu dem ersten Druck ist von einem Zyklus zum anderen identisch.
  5. Verfahren nach Anspruch 1, bei dem die Wiederholung der Zyklen unterbrochen wird, wenn die folgende Bedingung erfasst wird: das Gefälle von dem zweiten Druck zu dem ersten Druck ist identisch mit einem Referenzgefälle, das einem gewünschten Feuchtigkeitsgehalt in der Einfassung entspricht.
  6. Verfahren nach Anspruch 1, bei dem eine neue Wiederholung der Zyklen gestartet wird, wenn während der Druckerhöhung ab dem dritten Druck die Druckänderung nach einer bestimmten Dauer größer als die Druckänderung für einen gewünschten Feuchtigkeitsgehalt ist.
  7. Trocknungsanlage zum Durchführen des Verfahrens nach einem der vorhergehenden Ansprüche, die umfasst:
    - eine Steuereinheit,
    - eine Pumpe (7), die an eine Steuereinheit angeschlossen ist, um ein Mittel zum Extrahieren von Luft aus der Einfassung (8) zu bilden,
    - eine Hauptleitung, die ein Ende hat, das dazu bestimmt ist, mit dem oberen Teil der Einfassung (8) verbunden zu werden, um mit dem Innenvolumen der Einfassung (8) zu kommunizieren, sowie ein entgegengesetztes Ende, das mit dem Einlass der Pumpe (7) verbunden ist,
    - eine Nebenleitung, die ein Ende hat, das dazu bestimmt ist, mit dem unteren Teil der Einfassung (8) verbunden zu werden, um mit dem Innenvolumen der Einfassung (8) zu kommunizieren, und die mit einem Ventil (4) zum Einführen von Luft versehen ist, wobei das Ventil (4) von der Steuereinheit gesteuert wird,
    - einen Drucksensor (9), der dazu bestimmt ist, an der Einfassung (8) angebracht und mit der Steuereinheit verbunden zu werden,
    - dadurch gekennzeichnet, dass die Steuereinheit eine Rechnereinheit ist, die ausgebildet ist, um das Verfahren nach den Ansprüchen 1 bis 6 durchzuführen.
EP15196344.4A 2015-11-25 2015-11-25 Verfahren und anlage zum trocknen von vakuum-behältern Active EP3173720B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP15196344.4A EP3173720B1 (de) 2015-11-25 2015-11-25 Verfahren und anlage zum trocknen von vakuum-behältern
RU2018122773A RU2018122773A (ru) 2015-11-25 2016-11-25 Способ и установка для сушки камеры в вакууме
US15/778,650 US20180347902A1 (en) 2015-11-25 2016-11-25 Method and system for drying an enclosure
JP2018526899A JP2018538504A (ja) 2015-11-25 2016-11-25 真空チャンバーを乾燥させるための方法及び設備
PCT/EP2016/078900 WO2017089588A1 (fr) 2015-11-25 2016-11-25 Procede et installation de sechage d'enceinte sous vide
EP16808941.5A EP3380799A1 (de) 2015-11-25 2016-11-25 Verfahren und anlage zum trocknen einer vakuumkammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15196344.4A EP3173720B1 (de) 2015-11-25 2015-11-25 Verfahren und anlage zum trocknen von vakuum-behältern

Publications (2)

Publication Number Publication Date
EP3173720A1 EP3173720A1 (de) 2017-05-31
EP3173720B1 true EP3173720B1 (de) 2019-03-13

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP15196344.4A Active EP3173720B1 (de) 2015-11-25 2015-11-25 Verfahren und anlage zum trocknen von vakuum-behältern
EP16808941.5A Withdrawn EP3380799A1 (de) 2015-11-25 2016-11-25 Verfahren und anlage zum trocknen einer vakuumkammer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16808941.5A Withdrawn EP3380799A1 (de) 2015-11-25 2016-11-25 Verfahren und anlage zum trocknen einer vakuumkammer

Country Status (5)

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US (1) US20180347902A1 (de)
EP (2) EP3173720B1 (de)
JP (1) JP2018538504A (de)
RU (1) RU2018122773A (de)
WO (1) WO2017089588A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7316323B2 (ja) * 2021-06-30 2023-07-27 株式会社Ｓｃｒｅｅｎホールディングス 減圧乾燥装置および減圧乾燥方法
CN113915956A (zh) * 2021-10-13 2022-01-11 大冶市兴进铝业有限公司 一种型材干燥装置

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
JPS5555191Y2 (de) * 1975-04-02 1980-12-20
WO2001088449A1 (en) * 2000-05-19 2001-11-22 Sun Tae Choi Method of drying wood and a system therefor
JP5064119B2 (ja) * 2007-06-07 2012-10-31 東京エレクトロン株式会社 真空引き方法及び記憶媒体
FR2920046A1 (fr) * 2007-08-13 2009-02-20 Alcatel Lucent Sas Procede de post-traitement d'un support de transport pour le convoyage et le stockage atmospherique de substrats semi-conducteurs, et station de post-traitement pour la mise en oeuvre d'un tel procede
US8230616B2 (en) * 2009-06-11 2012-07-31 Sterilucent, Inc. Apparatus and method for drying and sterilizing objects in a load
JP5927066B2 (ja) * 2012-07-05 2016-05-25 株式会社協真エンジニアリング 乾燥装置及び乾燥方法

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* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
EP3173720A1 (de) 2017-05-31
WO2017089588A1 (fr) 2017-06-01
JP2018538504A (ja) 2018-12-27
US20180347902A1 (en) 2018-12-06
EP3380799A1 (de) 2018-10-03
RU2018122773A3 (de) 2019-12-25
RU2018122773A (ru) 2019-12-25

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