EP1830145A2 - Procédé et dispositif destinés à sécher ou concentrer des matières - Google Patents

Procédé et dispositif destinés à sécher ou concentrer des matières Download PDF

Info

Publication number
EP1830145A2
EP1830145A2 EP07102899A EP07102899A EP1830145A2 EP 1830145 A2 EP1830145 A2 EP 1830145A2 EP 07102899 A EP07102899 A EP 07102899A EP 07102899 A EP07102899 A EP 07102899A EP 1830145 A2 EP1830145 A2 EP 1830145A2
Authority
EP
European Patent Office
Prior art keywords
substance
pressure vessel
drying
gas
condenser
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.)
Withdrawn
Application number
EP07102899A
Other languages
German (de)
English (en)
Other versions
EP1830145A3 (fr
Inventor
Dr. Joachim Münzel
Friedrich Moser
Monika Lammertz
Frank Gockel
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.)
Messer Group GmbH
Original Assignee
Messer Group GmbH
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 Messer Group GmbH filed Critical Messer Group GmbH
Publication of EP1830145A2 publication Critical patent/EP1830145A2/fr
Publication of EP1830145A3 publication Critical patent/EP1830145A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/30—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/33—Humidity
    • F26B21/333—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle

Definitions

  • the invention relates to a method for drying or concentrating substances, in which a substance to be treated is exposed in a pressure vessel to an atmosphere with reduced pressure relative to the ambient pressure, partially evaporated from the substance evaporating water in a condenser and the condensate is discharged.
  • the invention further relates to a device for drying or concentrating substances.
  • drying refers to the removal of liquid constituents from solid, in particular free-flowing, substances.
  • concentration is meant here the corresponding removal of a liquid component, in particular water, from liquid mixtures or pasty substances.
  • drying and / or concentration various methods are used. The methods described below are used in particular for the treatment of foods or pharmaceutical products.
  • the substances are deprived of water by heat of more than 100 ° C, for example, to a water content of between 18% and 25%.
  • the high temperatures make valuable ingredients, e.g. Vitamins and proteins, destroyed, also taste changes occur.
  • liquid products are atomized into fine droplets at the top of a drying tower.
  • the drops are dried during their free fall by a stream of hot air in the tower.
  • the temperature of the hot air flow is between 150 - 250 ° C and acts on the products only for a period of half to one second.
  • the temperature of the powder particle cools down by the evaporation of water and is only about 60 - 80 ° C. As a result, the destruction of the ingredients is at least partially avoided, but the process is very time consuming.
  • freeze-drying frozen foods are dried under vacuum with the addition of heat. This sublimates the frozen, contained in food Water to steam and escapes. Depending on the food, the process takes up to 24 hours and is carried out at temperatures between -30 and +30 ° C. In freeze-drying, the product changes are extremely low. It is the gentlest, but also the most expensive and costly industrially applied method.
  • the invention is therefore based on the object to provide a possibility for drying or concentrating substances, which is less expensive and at the same time gentle for the product to be dried or concentrated.
  • the substance to be treated in the container is exposed to a gas stream at reduced pressure, which is continuously recycled by means of a suitable device, such as a fan or a pump, from the substance to be treated to the condenser and back again.
  • the negative pressure is chosen so that it is lower than the saturation vapor pressure of the liquid to be removed in each case at the temperature prevailing in the container when carrying out the method.
  • the substance to be treated is thereby particularly gently and effectively dried or concentrated.
  • the preferred gas in the gas stream is air or an inert gas, For example, nitrogen, for use.
  • the treatment of the substance is carried out either "batchwise", wherein the substance to be treated is first fed to the pressure vessel and then evacuated, or continuously, with the interposition of suitable pressure locks the continuous or portionwise feeding and removal of the substance in or out of the evacuated Pressure vessel is reached.
  • the inventive method is suitable both for drying solid, particularly free-flowing substances, as well as for the concentration of liquids.
  • the gas stream is brought into thermal contact in the device for air drying with a cryogenic medium, wherein the water contained in the gas stream at least partially freezes.
  • a cryogenic medium is in particular liquid or cryogenic nitrogen gas or liquid or cold gaseous carbon dioxide into consideration.
  • the substance and / or the gas stream is expediently heated.
  • the heating is used in particular to compensate for heat losses due to the evaporation of the water as well as due to the thermal contact of the gas stream with the heat exchanger surfaces.
  • the device according to the invention comprises a pressure vessel for receiving the substance to be treated, an evacuation device operatively connected to the pressure vessel for producing a predetermined negative pressure in the pressure vessel and a condenser for condensing water evaporating from the substance, and is characterized in that the pressure vessel and the condenser together one integrated with a device for generating a directed gas flow in a recycle gas line.
  • a gas stream is generated, which absorbs the evaporating from the substance to be treated moisture and then dried in the condenser and fed back to the substance to be treated.
  • the device according to the invention enables the efficient concentration of liquids.
  • the condenser is equipped with a heat exchanger surface which is thermally connectable to a cryogenic medium.
  • a cryogenic medium for example cryogenic gas or liquid gas.
  • liquefied or cold gaseous nitrogen or another liquid gas is suitable as the cryogenic medium.
  • cryocondensers in which the condensed water freezes on the heat exchanger surfaces to ice due to the low temperature of the coolant used, it is advantageous to provide several capacitors, which are used alternately for gas drying and for regeneration.
  • a condenser is used for gas drying, another condenser is decoupled from the gas stream and de-iced. This avoids that the cooling energy of the cryogenic medium is used only insufficiently due to the insulating effect of an ice formed on the heat exchanger surfaces of the cryocapacitor.
  • enteisungs memorizesity
  • a yet further advantageous embodiment of the invention provides that at least one heating device is provided for heating the circulated gas and / or the substance to be dried.
  • the pressure vessel At least for liquid or bulk or pourable solids, it is expedient to equip the pressure vessel with a stirring device to increase the surface exposed to the dry gas stream.
  • “Concentration” generally means reducing the mole fraction of a mixture component and is not limited to the removal of water. Since the invention makes do without strong heating of the substances to be concentrated, heat-sensitive ingredients are spared and remain the substance even after the concentration process.
  • FIG. 1 shows schematically a device according to the invention for concentrating liquids.
  • the device 1 comprises a pressure vessel 2 connected to an inlet 3 for supplying a liquid to be concentrated and an outlet 4 for discharging the concentrated liquid.
  • Inlet 3 and outlet 4 are each equipped with locking valves.
  • a stirring device 5 is provided, which is driven by a motor 6.
  • two gas lines 9, 14 enter the pressure vessel 2.
  • the gas outlet line 9 leads from the pressure vessel via a heat exchanger 11 and a gas conveyor 12 to a connection point 13, from which the gas inlet line 14 leads back into the pressure vessel 2.
  • a check valve 15 is arranged. From the junction 13 branches off a gas line 16, which is also equipped with a check valve 17.
  • a heater 18 is used for heating the liquid in the pressure vessel 2.
  • the pressure vessel 2 is filled via the inlet 3 up to a certain filling level 19 with a liquid 20 to be concentrated. Subsequently, the blocking valve of the inlet 3 is closed. With open check valve 17 and closed check valve 15 which is still in the pressure vessel 2 located gas phase 7 by means of the gas conveyor 12 is reduced by the gas phase in the pressure vessel 2 via the gas line 16 is pumped so far until a predetermined final pressure below the saturation vapor pressure of the water at the current Temperature of the liquid 20 is reached, for example, 15-25 mbar at a product temperature of about 25 ° C.
  • the gas line 16 can also be used to flood the pressure vessel 2 with another gas, for example an inert gas such as nitrogen or carbon dioxide.
  • the gas delivery device 12 now serves to generate a circulating gas flow via the gas outlet line 14, the gas inlet line 14 and the gas phase 7 receiving part of the pressure vessel 2.
  • the concentrated Liquid 20 located water evaporates due to the low vapor pressure in the gas phase 7 and is transported with the circulating gas stream in the heat exchanger 11.
  • the liquid 20 is continuously circulated by means of the stirring device 5.
  • the heat exchanger 11 is a cryocondenser in which one or more heat exchanger surfaces are thermally connected to a cryogenic medium, for example liquid or cold gaseous nitrogen.
  • a device of this kind is for example in the DE 10 2004 026 908 A1 described.
  • the water vapor contained in the circulating gas stream at least partially condenses and is removed via a suitable condensate separator.
  • a suitable condensate separator In the event that the circulating gas stream is cooled to such an extent on contact with the heat exchanger surfaces that the water freezes to ice, it proves useful to operate a plurality of heat exchangers 11, one of which is in the operating state, ie for condensation of the water is used while the other capacitor (s) is / are regenerated or defrosted respectively.
  • the dried circulating gas stream is returned via the gas inlet 14 back into the pressure vessel 2 and can now absorb water vapor again. Since heat is removed from the liquid 20 during the evaporation of the water, it is supplied with heat energy by means of the heater 18.
  • the heating device 18 also serves to compensate for heat losses that occur due to the contact of the circulating gas with the heat exchanger surfaces of the heat exchanger 11.
  • a separate heating device may be provided, which is provided for example in the gas inlet line 14.
  • the blocking valve is opened in the outlet 4 and the liquid 20 removed from the pressure vessel 2.
  • a liquid 20 is concentrated quickly and efficiently.
  • suitable pressure locks in the inlet 3 and outlet 4 the supply and discharge of the liquid can also be done without changing the pressure in the pressure vessel. In this way, a continuous implementation of the concentration process is possible.
  • the pressure vessel 2 can also be equipped with a removable lid.
  • the supply or removal of the substance 20 takes place in this case after pressure equalization and removal of the lid.
  • Such an arrangement is particularly recommended in the treatment of highly viscous liquids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
EP07102899.7A 2006-03-02 2007-02-22 Procédé et dispositif destinés à sécher ou concentrer des matières Withdrawn EP1830145A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006009614A DE102006009614A1 (de) 2006-03-02 2006-03-02 Verfahren und Vorrichtung zum Trocknen oder Konzentrieren von Stoffen

Publications (2)

Publication Number Publication Date
EP1830145A2 true EP1830145A2 (fr) 2007-09-05
EP1830145A3 EP1830145A3 (fr) 2013-12-18

Family

ID=38121615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07102899.7A Withdrawn EP1830145A3 (fr) 2006-03-02 2007-02-22 Procédé et dispositif destinés à sécher ou concentrer des matières

Country Status (2)

Country Link
EP (1) EP1830145A3 (fr)
DE (1) DE102006009614A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2521445B1 (fr) 2010-01-04 2019-08-28 Basf Se Formulation et son utilisation
DE102011014105B4 (de) * 2011-03-16 2013-01-31 Christian Gruß Vorrichtung und Verfahren zur Gewinnung von Reinstoffen als Medikamentenrohstoff aus Blüten, Wurzeln oder Kräutern
DE102012101992B4 (de) * 2012-03-09 2017-11-09 Bvg Bauer Verfahrenstechnik Gmbh Vorrichtung und Verfahren zur Aufkonzentration von Stärkekleistern sowie Verwendung
DE102014217226B4 (de) 2014-08-28 2021-09-23 Skf Blohm + Voss Industries Gmbh Verdampfungsanlage, Verdampfungsverfahren und Abdichtungssystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584781A (en) * 1985-04-29 1986-04-29 Martin Parkinson Low friction vacuum valve and drying apparatus
US5103578A (en) * 1991-03-26 1992-04-14 Amoco Corporation Method and apparatus for removing volatile organic compounds from soils
US5253597A (en) * 1992-06-18 1993-10-19 Chemical Waste Management, Inc. Process for separating organic contaminants from contaminated soils and sludges
US7089681B2 (en) * 2002-11-26 2006-08-15 Alkermes Controlled Therapeutics, Inc. Method and apparatus for filtering and drying a product

Also Published As

Publication number Publication date
DE102006009614A1 (de) 2007-09-06
EP1830145A3 (fr) 2013-12-18

Similar Documents

Publication Publication Date Title
EP0252394B1 (fr) Procédé de séchage de substances végétales ou animales
US9897375B2 (en) Continuous flow dryer for treating bulk material
EP0017250A1 (fr) Procédé et appareil pour le séchage sous vide de produits sensibles et produits séchés ainsi obtenus
DE2537850A1 (de) Verfahren zur trocknung von schuettguetern in einem gefriertrockner
EP0980503A1 (fr) Procede de commande d'un processus de lyophilisation
DE2337549A1 (de) Verfahren und einrichtung zum gefriertrocknen
EP1830145A2 (fr) Procédé et dispositif destinés à sécher ou concentrer des matières
DE10246599A1 (de) Methode und Apparat zum Ausführen von mehrfachen Reinigungs- und Vakuumtrocknungsvorgängen in geschlossenen Behältern
EP1033081B1 (fr) Méthode et appareil pour l'expansion des produits alimentaires et stimulants
EP2667116B1 (fr) Procédé et dispositif destinés au refroidissement
US4635380A (en) Method and apparatus for heat treating flowable materials
WO2010051572A2 (fr) Procédé de séchage d'un produit à sécher
DE19940371A1 (de) Verfahren und Vorrichtung zur Gewinnung von Kohlendioxid aus Abgasen
DE60301399T2 (de) Methode und system zur desorption und rückgewinnung von desorbierten verbindungen
DE1604803A1 (de) Verfahren zur kontinuierlichen Absorbierung und Beseitigung von Wasserdampf oder anderen Loesungsmitteln durch Verdampfung oder Sublimation bei niedriger Temperatur unter Vakuum
DE4113512C2 (de) Verfahren und Vorrichtung zur Gefriertrocknung und Pulverisierung von Lebensmitteln
DE19702674C2 (de) Vorrichtung zur Abkühlung von Produkten, die flüchtige Komponenten, insbesondere Wasser enthalten, durch beschleunigte Abkühlung mittels Vakuum
DE69925676T2 (de) Verfahren und Vorrichtung zur Kühlung einer wässerigen Flüssigkeit
DE3724960A1 (de) Verfahren und anlage zum trocknen von feuchten schuettguetern in einem wirbelbett-trockner
DE102004005660A1 (de) Verfahren und Vorrichtung zur Herstellung eines lyophilisierten pharmazeutischen Materials
EP2020580B1 (fr) Procédé de préparation d'ensilage
DE10118580C2 (de) Verfahren zur Behandlung der Atmosphäre in Autoklaven
EP4599918A1 (fr) Installation de recyclage de réfrigérateur
DE102004018788B3 (de) Verfahren zum Kühlen und/oder Gefrieren feuchter Produkte
DE4443296C2 (de) Verfahren zur Rückgewinnung von in Gütern adsorbierten oder absorbierten flüssigen oder gasförmigen Lösungsmitteln

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MESSER GROUP GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RIC1 Information provided on ipc code assigned before grant

Ipc: F26B 21/08 20060101ALI20131114BHEP

Ipc: F26B 5/04 20060101AFI20131114BHEP

17P Request for examination filed

Effective date: 20140618

RAX Requested extension states of the european patent have changed

Extension state: MK

Payment date: 20140618

Extension state: RS

Payment date: 20140618

Extension state: HR

Payment date: 20140618

Extension state: BA

Payment date: 20140618

Extension state: AL

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AXX Extension fees paid

Extension state: HR

Payment date: 20140618

Extension state: RS

Payment date: 20140618

Extension state: MK

Payment date: 20140618

Extension state: BA

Payment date: 20140618

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140619