WO1995024600A1 - Procede de sechage sous vide et disposition pour sa mise en oeuvre - Google Patents

Procede de sechage sous vide et disposition pour sa mise en oeuvre Download PDF

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Publication number
WO1995024600A1
WO1995024600A1 PCT/EP1995/001189 EP9501189W WO9524600A1 WO 1995024600 A1 WO1995024600 A1 WO 1995024600A1 EP 9501189 W EP9501189 W EP 9501189W WO 9524600 A1 WO9524600 A1 WO 9524600A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
vacuum pump
vacuum drying
vacuum
water ring
Prior art date
Application number
PCT/EP1995/001189
Other languages
German (de)
English (en)
Inventor
Heinz Eichholz
Original Assignee
Heinz Eichholz
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 Heinz Eichholz filed Critical Heinz Eichholz
Publication of WO1995024600A1 publication Critical patent/WO1995024600A1/fr

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
    • F26B5/041—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 flowable materials, e.g. suspensions, bulk goods, in a continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
    • 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
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F26B17/205—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined with multiple chambers, e.g. troughs, in superimposed arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • Such a method and an associated device are known from EP 0 240 793 B1.
  • water flows through the water ring vacuum pump and the water is conducted in a water circuit with at least one heat from the water to the heat exchanger to be dried.
  • the known method is characterized in that the circulated water before it flows into the water ring vacuum pump is passed through a waste heat from the pump and the pump drive to the water-transferring heat exchanger.
  • the device for carrying out the known method has a heat exchanger for the water flowing through the water ring vacuum pump and is characterized by the features that a further heat exchanger is switched on in the water circuit upstream of the water ring vacuum pump, in which the circulated water before the Inflow into the water ring vacuum pump can be heated by waste heat from the pump and the pump drive, the pump, the pump drive and the heat exchanger being arranged in a common, heat-insulated housing.
  • the embodiment of the vacuum drying method according to claim 1 offers the advantage that no additional heat has to be supplied for the heating of the material to be dried during operation. Preheating may only be necessary for the first start of the device so that the lead time does not become too long.
  • the heat transfer in the stages is particularly good due to the condensation of the water vapor, which is under vacuum; this results in very high energy savings compared to known methods.
  • a single water ring vacuum pump is required, which extracts the water from the material to be dried in vapor form and which drives the water vapor, which is under vacuum, to dry the material through the system.
  • the condensate formed during the indirect heating of the at least one further stage is fed to an intermediate container and from there optionally fed to the water ring vacuum pump and / or to a drain. This makes it possible to regulate the amount of condensate for the water ring vacuum pump.
  • collecting containers or liquid calming sieves can be provided at the condensate inlet for collecting entrained contaminants.
  • the vacuum drying chambers each have two generally tubular bodies arranged approximately parallel to one another or at an acute angle to one another, approximately the same length being arranged in each tube body, a regulated drivable screw being arranged with which the material from one Entrance at one end of one tubular body can be conveyed through a connecting pipe at its other end to the other tubular body and through this to an outlet at the other end, each tubular body being surrounded by a through-flow jacket and the jacket of the two Tubular bodies in each vacuum drying chamber are connected to one another so that they can flow through.
  • FIG. 1 shows a first embodiment with only one vacuum pump and without an insulating housing, in a schematic representation, in
  • a drivable screw conveyor is arranged in each of the tubular bodies 42, 52, 62, only the upper and lower ones being shown schematically.
  • the screw conveyors are preferably driven by geared motors that can be regulated.
  • the motors are indicated on the right side of FIG. 1.
  • the material to be dried, containing water, is introduced into the upper tubular body 41 through an inlet at the top in FIG. 1 in the direction of the arrow and moved to the right in the direction of the arrow through the first screw conveyor.
  • the material then passes through an opening in the area the gear motors of the first vacuum drying chamber 4 into the lower tubular body 41, is conveyed from right to left by a screw conveyor, not shown, in the direction of the arrow, then passes through a transition region into the second vacuum drying chamber 5, where it is conveyed by a screw conveyor, not shown, in the upper tubular body 52 transported from left to right, falls through a transition near the geared motors of the vacuum drying chamber 5 into the lower tubular body 52, is moved from right to left there by a screw conveyor, not shown, falls through a transition into the third vacuum drying chamber 6 , where the material to be dried is transported in a manner similar to that in the other two vacuum drying chambers 4 and 5, and finally reaches an outlet which is shown below in FIG. 1 as an outlet lock.
  • the temperature numbers entered are intended to give an approximate indication of the gradual heating of the material to be dried as it is transported through the vacuum drying chambers 4, 5 and 6, the temperatures only being indicative and depending on the type of process and the Good things are changeable.
  • the water vapor emerging from the casing 41 and under vacuum is led in the direction of the arrow through a pipe to the suction side 11 of a water ring vacuum pump 1 and at least partially conveyed from the pressure side 12 thereof into a casing 61 of the vacuum drying chamber 6, where it can be Wasser ⁇ ring vacuum pump elevated temperature contributes to the heating and drying of the conveyed material in the tubular bodies 62 and thereby partially condensed.
  • a line is led from the pressure side 12 of the pump 1 to an outlet 3, an overpressure valve 13 being switched on in this line, the first opens when a specified pressure is exceeded.
  • the water vapor emerging from the tubular bodies 62 arrives in the direction of the arrow through a pipe connection into an intermediate container 2, where condensate entrained is collected.
  • a heat-insulating insulation is provided around the device so that the waste heat from the motors can also be used for drying.
  • the insulation is accessible for maintenance work in a manner known per se, the switching elements being expediently arranged outside the insulation.
  • a further vacuum pump 8 is provided in the embodiment shown here, which has a suction side 81 and a pressure side 82.
  • the remaining parts have the same reference numbers as in the two other figures and are constructed accordingly in the same way.
  • the water vapor from the dry material in the three vacuum drying chambers 4, 5, 6 reaches through a line which runs from all three upper tubular bodies 42, 52, 62 to the upper casing 41 into the same and warms the goods there again with partial condensation on the outer wall of the upper tubular body 42.
  • the water vapor flowing back from the casing 41 of the vacuum drying unit 4 comes into a condensate collection container 7, where condensate is separated.
  • a cooling water supply line 88 the suction side 81 of the vacuum pump 8 can be supplied with condensed water from the container 7 in a controlled manner for cooling purposes.
  • the water vapor flowing back from the casing 51 reaches the suction side 11 of the water ring vacuum pump 1 through a pipeline, leaves it on the pressure side 12 and arrives in the casing 61 of the vacuum drying chamber 6, where it completes drying and out of the casing 61 flows back into the intermediate container 2, in which condensate is separated again.
  • the condensate can either be supplied to the water ring vacuum pump 1 or removed via the drain 3.

Landscapes

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

Abstract

L'invention concerne un procédé de séchage sous vide pour un produit à sécher, selon lequel le produit est chauffé et l'eau provenant du produit est évacuée sous forme de vapeur d'eau maintenue sous dépression, cette dépression étant produite par au moins une pompe à vide à anneau d'eau (1). Conformément à l'invention, le produit est séché en au moins deux étages, la vapeur d'eau maintenue sous dépression et provenant des étages étant rassemblée et utilisée, avec condensation au moins partielle, pour le chauffage indirect dans le premier étage, et la vapeur d'eau refluant en provenance de cet étage étant amenée à la pompe à vide à anneau d'eau (1) puis, de là, envoyée pour le chauffage indirect dans les autres étages. Selon la variante, le procédé fait appel à une pompe à vide (8) supplémentaire, les deux pompes (1, 8) étant montées en série. Un dispositif pour la mise en oeuvre du procédé comprend une installation de séchage sous vide pouvant être chargée par le produit à sécher, au moins une pompe à vide à anneau d'eau (1) et des vis sans fin transporteuses (43, 53, 63) dans des organes tubulaires (42, 52, 62), lesdites vis sans fin (43, 53, 63) acheminant le produit à transporter à travers les organes tubulaires (42, 52, 62), les organes tubulaires étant raccordés deux à deux de manière à former des chambres de séchage sous vide (4, 5, 6).
PCT/EP1995/001189 1994-03-11 1995-03-09 Procede de sechage sous vide et disposition pour sa mise en oeuvre WO1995024600A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4408147.2 1994-03-11
DE4408147A DE4408147C1 (de) 1994-03-11 1994-03-11 Vakuumtrocknungsverfahren und Vorrichtung zu dessen Durchführung

Publications (1)

Publication Number Publication Date
WO1995024600A1 true WO1995024600A1 (fr) 1995-09-14

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PCT/EP1995/001189 WO1995024600A1 (fr) 1994-03-11 1995-03-09 Procede de sechage sous vide et disposition pour sa mise en oeuvre

Country Status (2)

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DE (1) DE4408147C1 (fr)
WO (1) WO1995024600A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1739933B (zh) * 2004-08-23 2010-06-09 星精密机械有限公司 树脂团粒干燥装置及干燥方法
EP2262872A1 (fr) * 2008-04-10 2010-12-22 The Crucible Group Pty Ltd Traitement de matières organiques
JP2014234948A (ja) * 2013-06-03 2014-12-15 睦和興業株式会社 乾燥炭化装置及びその方法
US9708540B2 (en) 2008-04-10 2017-07-18 The Crucible Group Pty Ltd Processing organic materials
RU2716056C1 (ru) * 2019-03-13 2020-03-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный технический университет" (ФГБОУ ВО "ТГТУ") Энергоэффективная конвективно-вакуум-импульсная сушильная установка с тепловыми аккумуляторами

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734212B4 (de) * 1997-08-07 2007-10-11 Solar Und Vakuum Technologie (Svt) A.G. Vakuumtrocknungseinrichtung
TW200523087A (en) * 2004-01-07 2005-07-16 Star Seiki Kk Resin pellet dryer
UA81138C2 (en) * 2005-07-27 2007-12-10 Bielov Oleksandr Pavlovych Apparatus for thermo-vacuum drying
JP2007160581A (ja) * 2005-12-12 2007-06-28 Star Seiki Co Ltd 樹脂ペレットの除湿乾燥装置及びその方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE74944C (de) * 1893-10-20 1894-05-10 W. lanke in Trendelbusch b. Helmstedt Vorrichtung zum Trocknen von Rübenschnitxelnu. s.w. unter Luftleere
FR6098E (fr) * 1906-01-10 1906-08-29 Jules Savary Procédé et appareil pour le séchage des matières pulvérulentes et autres
FR679733A (fr) * 1929-08-02 1930-04-16 Schmidt Sche Heissdampf Installation de séchage, de concentration ou de cuisson étagés au moyen de la vapeur
DE896175C (de) * 1949-05-23 1953-11-09 Albert Edouard Caillat Verfahren und Vorrichtung zum kontinuierlichen Trocknen koernigen oder pulverfoermigen Gutes
FR1161753A (fr) * 1955-10-08 1958-09-04 Installation de séchage
FR2441813A1 (fr) * 1978-11-16 1980-06-13 Commissariat Energie Atomique Procede et dispositif de sechage d'un produit renfermant au moins un constituant volatil
GB2083190A (en) * 1980-08-06 1982-03-17 Bradshaw William Drying apparatus with heat exchanger
DE8424789U1 (de) * 1984-08-21 1986-07-17 Schmidt-Burr, Peter, 8000 München Trenneinrichtung zum thermischen Trennen von Substanzgemischen
EP0240793A2 (fr) * 1986-04-08 1987-10-14 Heinz Eichholz Procédé de condensation pour vapeur d'eau hypoborique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE74944C (de) * 1893-10-20 1894-05-10 W. lanke in Trendelbusch b. Helmstedt Vorrichtung zum Trocknen von Rübenschnitxelnu. s.w. unter Luftleere
FR6098E (fr) * 1906-01-10 1906-08-29 Jules Savary Procédé et appareil pour le séchage des matières pulvérulentes et autres
FR679733A (fr) * 1929-08-02 1930-04-16 Schmidt Sche Heissdampf Installation de séchage, de concentration ou de cuisson étagés au moyen de la vapeur
DE896175C (de) * 1949-05-23 1953-11-09 Albert Edouard Caillat Verfahren und Vorrichtung zum kontinuierlichen Trocknen koernigen oder pulverfoermigen Gutes
FR1161753A (fr) * 1955-10-08 1958-09-04 Installation de séchage
FR2441813A1 (fr) * 1978-11-16 1980-06-13 Commissariat Energie Atomique Procede et dispositif de sechage d'un produit renfermant au moins un constituant volatil
GB2083190A (en) * 1980-08-06 1982-03-17 Bradshaw William Drying apparatus with heat exchanger
DE8424789U1 (de) * 1984-08-21 1986-07-17 Schmidt-Burr, Peter, 8000 München Trenneinrichtung zum thermischen Trennen von Substanzgemischen
EP0240793A2 (fr) * 1986-04-08 1987-10-14 Heinz Eichholz Procédé de condensation pour vapeur d'eau hypoborique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1739933B (zh) * 2004-08-23 2010-06-09 星精密机械有限公司 树脂团粒干燥装置及干燥方法
EP2262872A1 (fr) * 2008-04-10 2010-12-22 The Crucible Group Pty Ltd Traitement de matières organiques
EP2262872A4 (fr) * 2008-04-10 2011-10-12 Crucible Group Pty Ltd Traitement de matières organiques
US8888962B2 (en) 2008-04-10 2014-11-18 The Crucible Group Pty Ltd Processing organic materials
US9708540B2 (en) 2008-04-10 2017-07-18 The Crucible Group Pty Ltd Processing organic materials
JP2014234948A (ja) * 2013-06-03 2014-12-15 睦和興業株式会社 乾燥炭化装置及びその方法
RU2716056C1 (ru) * 2019-03-13 2020-03-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный технический университет" (ФГБОУ ВО "ТГТУ") Энергоэффективная конвективно-вакуум-импульсная сушильная установка с тепловыми аккумуляторами

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DE4408147C1 (de) 1995-08-24

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