US3769717A - Apparatus for freezedrying material with loading and discharging means - Google Patents

Apparatus for freezedrying material with loading and discharging means Download PDF

Info

Publication number
US3769717A
US3769717A US00174448A US3769717DA US3769717A US 3769717 A US3769717 A US 3769717A US 00174448 A US00174448 A US 00174448A US 3769717D A US3769717D A US 3769717DA US 3769717 A US3769717 A US 3769717A
Authority
US
United States
Prior art keywords
chamber
lock
freezedrying
trays
vacuum
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.)
Expired - Lifetime
Application number
US00174448A
Other languages
English (en)
Inventor
C Carlsen
J Lorentzen
V Christiansen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3769717A publication Critical patent/US3769717A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F26B5/06—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 the process involving freezing

Definitions

  • the invention relates to an apparatus for freezedrying material, comprising a vacuum chamber with lock means for charging and discharging material.
  • the vacuum chamber may be connected with at least two sets of water vapour condensing surfaces located within or outside the vacuum cabinet, and that separately can be isolated from the vacuum chamber.
  • the isolation means are arranged in such a way that at any time at least one set of condensing surfaces is not isolated from the vacuum chamber. In this case a certain capacity is available for condensing for maintaining vacuum in the vacuum chamber, and simultaneously one set of condensing surfaces can be deiced so that the latter set is prepared for subsequent condensing.
  • the apparatus according to the invention may have means for radiation heat transfer to freezedrying goods forming a flat layer of granules, preferably substantially free from small particles. It has turned out that hereby a specially effective freezedrying can be obtained.
  • the lock means according to the invention may comprise at least one lock chamber that. is arranged to be sealingly closed to the atmosphere and to the vacuum chamber into different temperature zones.
  • the apparatus comprises means for altering the division into temperature zones, by which an adaption to different kinds of freeze-drying goods may be obtained.
  • the apparatus may be arranged in such a manner that it comprises lock means for charging of one tray of freezedrying goods at a time into the vacuum chamber to a lifting mechanism, which is arranged for lifting the trays one step at a time to make a pile or stack of trays, that rest each on its own level of the lifting mechanism on a level with a horizontal conveyor track for trays, which conveyor tracks are situated between the heat plates.
  • lock means for charging of one tray of freezedrying goods at a time into the vacuum chamber to a lifting mechanism, which is arranged for lifting the trays one step at a time to make a pile or stack of trays, that rest each on its own level of the lifting mechanism on a level with a horizontal conveyor track for trays, which conveyor tracks are situated between the heat plates.
  • a vacuum pump for the lockchamber may be independent of the vacuum chamber, respectively of means for maintaining the vacuum in the vacuum chamber, and a closing member between the lock chamber and the vacuum chamber may preferably have its sealing abutment on the lock chamber side, so
  • a closing member between the atmosphere and the lock chamber may preferably have its sealing abutment on the atmosphere side, so that the atmospheric pressure by sub-pressure in the lock chamber presses the closing member to sealing abutment.
  • a vacuum conduit with a controllable valve for pressure equalization before opening between the lock chamber so that the closing member is easily opened and the vacuum chamber.
  • the apparatus may be arranged in such a way that it has a number of heat plates located over each other, which are arranged in a number of sets in plate carriages, for instance four or more, each of which having connecting means for heat energy supply to the plates in the plate carriage, preferably for circulation of a heat medium, the apparatus having means for maintaining different heat levels in two or more plate carraiges for providing different temperature zones in the vacuum chamber.
  • the apparatus may comprise means for pushing forwards trays on the conveyor tracks one tray-length at a time from an entry elevator to an exit-- elevator.
  • the apparatus may be arranged in such a manner that the trays during the conveying from the entry elepair the vacuum in the vacuum chamber, corresponding to an absolute pressure of below the vapour pressure of water at 0 C, for instance an absolute pressure of only 1 Torr.
  • the apparatus may be arranged in such a way that it comprises an exit elevator for receiving trays from the horizontal conveyor tracks as the result of the pushing forward of trays on these conveyor tracks through the of a set or a stack oftrays, to move a little bit farther in the conveying direction towards in the vacuum chamber fixedly located, on a vertical line situated stopping means to secure that the trays are brought into line with each other before the lowering inthe elevator.
  • an exit elevator for receiving trays from the horizontal conveyor tracks as the result of the pushing forward of trays on these conveyor tracks through the of a set or a stack oftrays, to move a little bit farther in the conveying direction towards in the vacuum chamber fixedly located, on a vertical line situated stopping means to secure that the trays are brought into line with each other before the lowering inthe elevator.
  • FIG. 1 shows the apparatus in horizontal sectional view, seen from above
  • FIG. 2 the same in vertical longitudinal sectional view
  • FIG. 3 the same in vertical sectional view, at one end of the apparatus
  • FIG. 4 a vertical partial sectional view of a plate carriage with heat plates and tracks for trays
  • FIG. 5 section of a lock or sluice mechanism for charging trays into the apparatus
  • FIG. 6 a diagram showing the supply of heat to the plate carriages
  • FIG. 7 adiagram showing the vacuum connections to a vacuum chamber and a charginglock.
  • the apparatus comprises an oblong cabinet 1, that constitutes a vacuum drying chamber, in which a sufficiently high vacuum for freezedrying is maintained.
  • the cabinet 1 has substantially cylindrical section and convex end walls, at least one of which can be opened or is detachable, not shown.
  • a number of plate carriages are placed, for instance five, that each has a frame with vertical rods 2, upon which horizontal heat plates 3 are fastened, being arranged for the circulation of a heat medium, whereby the surfaces of the heat plates can emit heat rays upwards and downwards.
  • horimedium zontal tracks or rails 4 are fastened, suitably heat isolated from the heat plates, on the rods 2.
  • the plate carriages are placed end to end so that the tracks 4 lie level with each other. For instance, there may be seven sets of tracks above each other so that the tracks 4 at the two sides of the plate carriages form horizontal conveyor tracks for trays 5, which preferably consist of aluminium andat each side comprise slide fittings 6, pref? erably consisting of polytetrafluorethylene (PTFE), so that the trays can slide easily on the tracks 4.
  • PTFE polytetrafluorethylene
  • the cabinet 1 has an aperture for lock or sluice means including a lock chamber 7, a hydraulic cylinder 8 for pushing one tray at a time into the lock chamber 7 through a closable aperture 9, means 10 for charging one tray at a time from the lock chamber 7 through a closable aperture-11 to the vacuum chamber in the cabinet 1.
  • the tray 5 will rest on a supporting means 12, having teeth, which cooperates with a gear-wheel in the means 10 driven by a mo tor, not shown, so that the supporting means 12'is introduced into the cabinet with thetray resting upon it. Thereafter, the gear-wheel again draws the supporting means out into the lock chamber, while the tray is maintained in the cabinet.
  • the tray In thecabinet the tray will rest upon a lifting mechanism 13, that is arranged to lift the tray a relatively small distance upwards, whereafter its edges are gripped by projections 14 on endless, vertically extending bands l5.
  • the projections 14 are located with a'pitch corresponding to the vertical dis- I tance between the tracks 4 in the plate carriages.
  • a pushing mechanism comprising a hydraulic-cylinder 16 and means 17, arranged to push at the edge of the trays 5 resting on the projections 14, by means of which the trays are pushed in upon the tracks 4.
  • the length of movementby means of the pushing mechanism -16, '17 is equal to the length of a tray.
  • a similar elevator being an exit elevator, and being provided for receiving trays from the tracks 4.
  • This exit elevator is arranged to be lowered one projection-pitch at a time and thereby to deliver one tray at a time to the lifting apparatus 13 in question, here being arranged to lower one tray at a time down onto a means 12, which moves the tray out through the closable aperture 11 in question at the other end of the cabinet, where a discharge lock 18 is located, corresponding to the charge 7-11, apart from the fact that the former instead of the hydraulic cylinder 8 has a hydraulic cylinder 19 for pushing out a tray from the lock chamber.
  • the two endless bands of the discharge elevator and a frame for these are arranged movably in longitudinal direction of the cabinet and are connected with a hydraulic cylinder 20 for moving the bands a little bit forwards and backwards.
  • the bands thereof will be in the position shown at the left in FIG. 1. Thereafter, they are moved a little to the right, whereby the trays 5 on the projections 14 hit fixedly located stopping means 21, by which the trays are brought into a position exactly vertical above each other, so that they are brought to the discharge lock in exactly the same position.
  • the cabinet 1 at its bottom has a widening 22, in which two sets of water vapour condensing tubes 23 and 24 are located one in each compartment 25 and 26, which are separated from the vacuum chamber in the cabinet by means of horizontal walls 27 and 28, and which are separated from each other by a vertical wall 29(Between the edges of the walls 27 and 28 and the top edge of the wall 29 an aperture is provided from the vacuum chamber to each of the compartments 25 and 26.
  • a swingable .flap 30 in its two extreme positions closes the aperture of the one compartment 25 and of the other compartment 256 respectively.
  • the two compartments 25 and 26 are 'connected with a chamber 32, in which a heat tube 33 is located, and in which, during operation, water is kept at a temperature by which the vapour pressure of the water is a small fraction of one atmosphere, for instance 1020 C.
  • the chamber 32 comprises an overflow 34, through which surplus water may flow without impairing the vacuum in the chamber 32.
  • the water removing system is not shown.
  • FIG. 5 there is very schematically shown lock means that may be used either as charging lock means or as discharging lock means.
  • An aperture 35 between the lock chamber and the vacuum chamberin the cabinet 1 is closeable by means of a valve flap 36, that by means of a hydraulic cylinder 37 can be swung from the shown open position to a closed position, where the flap is in contact with the sealing means 38 around the aperture 35.
  • a valve flap 36 that by means of a hydraulic cylinder 37 can be swung from the shown open position to a closed position, where the flap is in contact with the sealing means 38 around the aperture 35.
  • the toothing on the under side of the supporting means 12 and a gear-wheel 39 for backand forwards moving the supporting means 12 are shown.
  • charging of the trays 5- takes place in the longitudinal direction of the lock chamber for the sake of the clearness.
  • the-lock chamber comprises an aperture, which is shown closed by means of a valve flap 40, that is moved'by a hydraulic cylinder 41 from the illustrated closed positionto a not shown open position. In the shown closed position the valve flap 40 bears against the sealing means 42.
  • the valve flaps are located in such a manner that the pressure difference that appears during operation acts to seal the flap.
  • the apparatus comprises a reservoir for heat medium which is connected to a conduit 43, from which a conduit 44 branches off to a valve mechanism 45, from where a conduit 46 branches off to a circulation pump 47 to a heat plate carriage 48, in which heat medium for instance may be led through a lower set of heat plates and therefrom through an upper set of heat plates to a discharge conduit 49, that leads back to the reservoir for heat medium.
  • a heat-sensing means 50 is located, operating the valve 45 in such a manner that a desired temperature of the heat plates in the heat plate carriage 48 is achieved.
  • conduit 51 branches off, in a similar way leading to a valve mechanism 52, from which a conduit 53 branches off to a circulation pump 54 to a heat plate carriage, in which heat medium, for instance, may be led through a lower set of heat plates 3 and therefrom through an upper set of heat plates to a discharge conduit 54, which is connected to the conduit 49 and which leads back to the reservoir for heat medium.
  • a sensing means 56 is located, operating the valve 52 in such a way that hereby a desired temperature of the heat platesin the heat plate carriage 55 is achieved.
  • the other heat plate carriages may be operated in similar way. There is'the possibility of having two or more heat plate carriages operated at the same temperature.
  • FIG. 7 something essential is shown regarding the control of vacuum in the cabinet 1 and the lock chamber or both lock chambers.
  • a suction conduit 57 to a vacuum pump 58 To' the lock chamber 7 is connected a suction conduit 59 to another vacuum pump 60.
  • a closeable valve 61 is located in the conduit 59.
  • a conduit 62 with a closable valve 63 is arranged between the lock chamber 7 and the conduit 57.
  • step 2 the'tray 5 is pushed in position in the lock chamber 7 until the initiator 66 is activated.
  • step 3 is initiated, in which the tray-pusher moves back out of the lock chamber, confer the hydraulic cylinder 8 in FIG. 1, however, FIG. 5 differing from FIG. 1 by the fact that the cylinder 8 in FIG. 5 is thought located opposite-the end of the lock chamber.
  • the mentioned tray-pusher moves outwards, until an end switch'registers that it is back in the initial position, by which step 4 is'initiated.
  • step 4 the lock flap 40 is closed, and the valve 59 is opened. During this the valve 63 and a valve 69 have been closed.
  • evacuation of the lock chamber 7 takes place by means ofthe vacuum pump 60.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 beings.
  • step 6 being opened, whereby the initiator 67 is activated, and the valve63 is closed.
  • step 5 starts again.
  • step 7 follows.
  • the supporting means 12 is moved by means of the gear-wheel 39 inwards into the cabinet 1 through the aperture released by the flap 36 and carries the tray 5 into position in the cabinet 1.
  • step 8 an initiator 71 is activated, starting step 8 during which the tray by the lifting mechanism 13 is lifted up onto the band conveyor-15.
  • step 9 follows, during which the supporting means 12 is carried back into thelock chamber until the initiator 65 is activated and starts step'10.
  • the lock flap 36 is closed and an initiator 72 is activated and starts step 11.
  • the valve 69 is opened, and air flows into the lock chamber 7, whereby the pressure herein is brought up to atmospheric pressure.
  • the valve 69 is closed and the lock flap 40 is opened, by which the initiator 64 is activated.
  • a new tray is lifted into position in front of the lock' flap 40, whereby the initiator 68 is activated.
  • the logical conditions of step 1 is'fulfilled and step 1 is repeated, and a new cycle is initiated.
  • initiators are used in-acorresponding way for operating the chargeand discharge band elevators 15, the cooperation of these with the lifting mechanism 13, the pushing mechanism 16, 17, the hydraulic cylinder 20.
  • F reezedrying' apparatus of the type comprising an oblong vacuum chamber, means for providing and maintaining freezedrying vacuum in the chamber, a material charging lock at one end of the chamber, a material discharging lock at the other end of the chamber, means for carrying material in the chamber from the charging lock to the discharging lock, and means for supplying heat to the material in the chamber, characterised in, that the charging lock is arranged for introducing one material tray at a time, that in the chamber near the charging lock means are provided for receiving one tray at a time and stepwise.
  • Freezedrying apparatus wherein a number of horizontal heat plates are arranged above each other in the freezedrying chamber, characterised in that the heat plates are arranged in a number of units arranged one after another in the longitudinal direction of the chamber.
  • Freezedrying apparatus characterized in that the vertical movement means near the discharging lock are arranged to be, after receipt of a stack of trays, moved a little way in the transport direction of the trays through the freezedrying chamber and that stop means are arranged in the chamber for stopping the trays to provide a precise vertical stack of trays.
  • Freezedrying apparatus characterized in that the charging lock has a tray supporting member arranged to be moved into the freezedrying chamber for carrying a tray into the freezedrying chamber and for delivering to vertical movement means and that rails are arranged in the freezedrying chamber for supporting the trays being pushed forward on said rails.
  • Freezedrying apparatus characterized in that a discharging lock has a tray supporting member arranged to be moved out of the freezedrying chamber for carrying a tray from the freezedrying chamber and for receiving a tray from the vertical movement means, and that rails are arranged in the freezedrying chamber for supporting the trays being pushed forward on said rails.
  • each lock 1 chamber comprises a closing member between a chamber of the lock and the vacuum chamber, said closing member having sealing abutment on the lock chamber side thereof so that over-pressure within the lock chamber in relation to the vacuum chamber presses the closing member to sealing abutment and a closing member between atmosphere and the .lock chamber, said latter closing member having sealing abutment on that side thereof exposed to atmosphere so that atmospheric pressure presses the closing member into sealing abutment.
  • Apparatus as claimed in claim 1 wherein said means for horizontal movement of said trays comprises a conveyor having means for pushing forward trays thereon one track length at a time between said vertical movement means.
  • Apparatus as claimed in claim 1 comprising an entry elevator and an exit elevator and means for synchronizing operation of said charging and discharging locks with said entry elevator and said exit elevator, said synchronizing means comprising a logic-control means of the various operation-steps with initiators for controlling the separate steps in such a manner that at any time a preceding step is fulfilled before the next step is initiated.
  • Freezedrying apparatus characterised in that a lock chamber in the charging lock or the discharging lock or both is connected with a vacuum pump which is independent of a vacuum pump for the freeze drying chamber, and that the lock chamber is connected with the freezedrying chamber by means of a conduit in which there is arranged a valve which is kept closed during formation of vacuum in the lock chamber and is opened previously to opening the connecting aperture between the lock chamber and the freezedrying chamber.
  • Freezedrying apparatus wherein a number of horizontal heat plates are arranged above each other in the freezedrying chamber, characterized in that the heat plates are arranged in a number of units arranged one after another in the longitudinal direction of the chamber.
  • Freezedrying apparatus characterized in that the vertical movement means near the discharging lock are arranged to be moved, afterreceipt of a stack of trays, a little way in the transport direction of the trays through the freezedrying chamber and that stop means are arranged in the chamber for stopping the trays to provide a precise vertical stack of trays.

Landscapes

  • 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)
US00174448A 1970-08-25 1971-08-24 Apparatus for freezedrying material with loading and discharging means Expired - Lifetime US3769717A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK434170AA DK137287B (da) 1970-08-25 1970-08-25 Frysetørringsapparat.

Publications (1)

Publication Number Publication Date
US3769717A true US3769717A (en) 1973-11-06

Family

ID=8132612

Family Applications (1)

Application Number Title Priority Date Filing Date
US00174448A Expired - Lifetime US3769717A (en) 1970-08-25 1971-08-24 Apparatus for freezedrying material with loading and discharging means

Country Status (7)

Country Link
US (1) US3769717A (de)
BR (1) BR7105565D0 (de)
DE (1) DE2142201A1 (de)
DK (1) DK137287B (de)
ES (1) ES394479A1 (de)
FR (1) FR2119913B1 (de)
GB (1) GB1370683A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129162A (en) * 1989-04-07 1992-07-14 Leybold Aktiengesellschaft Method and apparatus for loading and unloading containers from freeze-drying equipment
US5131170A (en) * 1990-02-26 1992-07-21 Finn-Aqua Santasalo-Sohlberg Gmbh Freeze-drying apparatus
US5964043A (en) * 1995-03-18 1999-10-12 Glaxo Wellcome Inc. Freeze-drying process and apparatus
US6297479B1 (en) * 1998-02-04 2001-10-02 Michael Wefers Method and apparatus for drying or heat-treating products
EP1706693A1 (de) * 2003-12-24 2006-10-04 Edward K. Alstat Verfahren und vorrichtung zur rückgewinnung von abflüssen aus einem gefriertrocknungsprozess und verwendungen für die abflüsse
WO2009006891A1 (en) * 2007-07-10 2009-01-15 Niro A/S Method for freeze-drying a product and freeze-drying apparatus for carrying out the method
EP2407037A1 (de) * 2008-12-26 2012-01-18 Metalquimia, SA Anlage zur trocknung und reifung von lebensmittelprodukten sowie verfahren zum transport solcher produkte innerhalb dieser anlage
CN103071309A (zh) * 2013-01-11 2013-05-01 辽阳博仕流体设备有限公司 一种变通导真空捕水装置
CN106322922A (zh) * 2016-11-21 2017-01-11 山东舜耕干燥设备有限公司 一种真空脉冲干燥机
US20180135913A1 (en) * 2014-10-08 2018-05-17 Robert M. Parker Heated shelf for a freeze-drying system having a leading folded edge that does not catch on food being removed from the system
US10011643B2 (en) 2011-06-07 2018-07-03 Asahi Kasei Pharma Corporation Freeze-dried preparation containing high-purity PTH and method for producing same
CN115451690A (zh) * 2022-11-01 2022-12-09 浙江同景冻干科技有限公司 一种冻干设备的加热装置以及冻干设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8222194V0 (it) * 1982-06-18 1982-06-18 Edwards Alto Vuoto Spa Dispositivo per il caricamento delle piastre porta-prodotto di una camera di liofilizzazione mediante impiego di contenitori preposizionati ad altezza costante.
US9739532B2 (en) * 2015-02-04 2017-08-22 Steven F. Baugh Botanical freeze drying system and method
CN105091507B (zh) * 2015-08-26 2017-11-21 楚天科技股份有限公司 一种冷冻干燥机
CN113091407A (zh) * 2021-05-11 2021-07-09 烟台天鹭食品有限公司 一种冻干仓装置
CN115711515B (zh) * 2022-11-07 2023-08-04 厚德食品股份有限公司 一种蛋黄上清液粉制备用冷冻干燥装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192645A (en) * 1959-10-07 1965-07-06 Leybold Aulagen Holding A G Apparatus and method for vacuum freeze drying substances in a tunnel dryer having sealing locks
US3234661A (en) * 1961-01-19 1966-02-15 Leybold Anlagen Holding A G Controlled multipressure drying apparatus
US3243892A (en) * 1964-02-24 1966-04-05 Beverly Refrigeration Inc Freeze drying apparatus
US3354609A (en) * 1963-04-06 1967-11-28 Leybold Anlagen Holding A G Freeze drying method and apparatus
US3382586A (en) * 1965-03-18 1968-05-14 Atlas As Apparatus for freeze-drying

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192645A (en) * 1959-10-07 1965-07-06 Leybold Aulagen Holding A G Apparatus and method for vacuum freeze drying substances in a tunnel dryer having sealing locks
US3234661A (en) * 1961-01-19 1966-02-15 Leybold Anlagen Holding A G Controlled multipressure drying apparatus
US3354609A (en) * 1963-04-06 1967-11-28 Leybold Anlagen Holding A G Freeze drying method and apparatus
US3243892A (en) * 1964-02-24 1966-04-05 Beverly Refrigeration Inc Freeze drying apparatus
US3382586A (en) * 1965-03-18 1968-05-14 Atlas As Apparatus for freeze-drying

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129162A (en) * 1989-04-07 1992-07-14 Leybold Aktiengesellschaft Method and apparatus for loading and unloading containers from freeze-drying equipment
US5131170A (en) * 1990-02-26 1992-07-21 Finn-Aqua Santasalo-Sohlberg Gmbh Freeze-drying apparatus
US5964043A (en) * 1995-03-18 1999-10-12 Glaxo Wellcome Inc. Freeze-drying process and apparatus
US6297479B1 (en) * 1998-02-04 2001-10-02 Michael Wefers Method and apparatus for drying or heat-treating products
US6442866B2 (en) 1998-02-04 2002-09-03 Michael Wefers Method and apparatus for drying or heat-treating products
EP1706693A1 (de) * 2003-12-24 2006-10-04 Edward K. Alstat Verfahren und vorrichtung zur rückgewinnung von abflüssen aus einem gefriertrocknungsprozess und verwendungen für die abflüsse
EP1706693A4 (de) * 2003-12-24 2009-01-14 Edward K Alstat Verfahren und vorrichtung zur rückgewinnung von abflüssen aus einem gefriertrocknungsprozess und verwendungen für die abflüsse
WO2009006891A1 (en) * 2007-07-10 2009-01-15 Niro A/S Method for freeze-drying a product and freeze-drying apparatus for carrying out the method
EP2407037A1 (de) * 2008-12-26 2012-01-18 Metalquimia, SA Anlage zur trocknung und reifung von lebensmittelprodukten sowie verfahren zum transport solcher produkte innerhalb dieser anlage
EP2407037A4 (de) * 2008-12-26 2012-05-30 Metalquimia Sa Anlage zur trocknung und reifung von lebensmittelprodukten sowie verfahren zum transport solcher produkte innerhalb dieser anlage
US10011643B2 (en) 2011-06-07 2018-07-03 Asahi Kasei Pharma Corporation Freeze-dried preparation containing high-purity PTH and method for producing same
US10683335B2 (en) 2011-06-07 2020-06-16 Asahi Kasei Pharma Corporation Freeze-dried preparation containing high-purity PTH and method for producing same
CN103071309A (zh) * 2013-01-11 2013-05-01 辽阳博仕流体设备有限公司 一种变通导真空捕水装置
CN103071309B (zh) * 2013-01-11 2015-02-25 辽阳博仕流体设备有限公司 一种变通导真空捕水装置
US20180135913A1 (en) * 2014-10-08 2018-05-17 Robert M. Parker Heated shelf for a freeze-drying system having a leading folded edge that does not catch on food being removed from the system
US10480855B2 (en) * 2014-10-08 2019-11-19 Robert M. Parker Heated shelf for a freeze-drying system having a leading folded edge that does not catch on food being removed from the system
CN106322922A (zh) * 2016-11-21 2017-01-11 山东舜耕干燥设备有限公司 一种真空脉冲干燥机
CN115451690A (zh) * 2022-11-01 2022-12-09 浙江同景冻干科技有限公司 一种冻干设备的加热装置以及冻干设备

Also Published As

Publication number Publication date
FR2119913B1 (de) 1973-11-30
DK137287C (de) 1978-08-28
DK137287B (da) 1978-02-13
FR2119913A1 (de) 1972-08-11
GB1370683A (en) 1974-10-16
BR7105565D0 (pt) 1973-05-24
ES394479A1 (es) 1974-09-16
DE2142201A1 (de) 1972-03-30

Similar Documents

Publication Publication Date Title
US3769717A (en) Apparatus for freezedrying material with loading and discharging means
US3469327A (en) Freeze drying apparatus
US3192645A (en) Apparatus and method for vacuum freeze drying substances in a tunnel dryer having sealing locks
SU953995A3 (ru) Способ сушки высоковлажных материалов
US3382586A (en) Apparatus for freeze-drying
US2697920A (en) Food freezing apparatus
US3421229A (en) Method and device for conveying goods to and from a vacuum or pressure container
US2634590A (en) Method and means for cooling produce by use of reduced pressure
US3365806A (en) Bulk freeze-drying method and apparatus
US2011247A (en) Method of cooking
US3354609A (en) Freeze drying method and apparatus
GB1247860A (en) Sterilization
US1415623A (en) Method of drying goods
US3448527A (en) Quick freeze-drying system and apparatus therefor
US3101995A (en) Continuous treatment of food containers
US3406463A (en) Grain drier
US3275724A (en) Method of autoclaving concrete blocks
US3263436A (en) Method of and apparatus for precooling concrete mix ingredients
US2792644A (en) Malting apparatus
NO148385B (no) Apparat for kobling av en roerleggingsstinger til et roerleggingsfartoey.
US1330195A (en) Drier
US4331633A (en) Batch sterilizing unit
US826886A (en) Malt-house and apparatus.
US1900974A (en) Process of dehydrating vegetables and the like
US3353477A (en) Steam cooking apparatus