EP0505677B1 - Differenziell gepumpter Mehrkammer-Vakuumbandtrockner - Google Patents

Differenziell gepumpter Mehrkammer-Vakuumbandtrockner Download PDF

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Publication number
EP0505677B1
EP0505677B1 EP92100964A EP92100964A EP0505677B1 EP 0505677 B1 EP0505677 B1 EP 0505677B1 EP 92100964 A EP92100964 A EP 92100964A EP 92100964 A EP92100964 A EP 92100964A EP 0505677 B1 EP0505677 B1 EP 0505677B1
Authority
EP
European Patent Office
Prior art keywords
belt dryer
container
vacuum belt
vacuum
chamber
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
EP92100964A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0505677A1 (de
Inventor
Franco Ferrari
Wolfgang Hinz
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.)
Bucher Guyer AG
Original Assignee
Bucher Guyer AG
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 Bucher Guyer AG filed Critical Bucher Guyer AG
Publication of EP0505677A1 publication Critical patent/EP0505677A1/de
Application granted granted Critical
Publication of EP0505677B1 publication Critical patent/EP0505677B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
    • F26B17/08—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being arranged in a sinuous or zig-zag path
    • 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

Definitions

  • the present invention relates to a vacuum belt dryer according to the preamble of claim 1.
  • Such a vacuum belt dryer is known from DE magazine CHEMIE-TECHNIK 14 (1985), number 7, pages 32-34 "New findings in continuous and batchwise vacuum belt drying". It contains a horizontally arranged cylindrical container which has an inlet and outlet and is closed on both sides by gates, one or more conveyor belts which are arranged in the longitudinal direction of the container and extend from the inlet to the outlet, and a device for generating a vacuum in the container to establish the pressure conditions in the interior of the container and a device for heating and / or cooling the product.
  • FR-A-2'368'000 G. Tomadini
  • a method for high-temperature drying of long or broken pasta is known, which works by means of a drying system with composite elements.
  • the drying system is partially or completely equipped with vibrating conveyor belts, which are provided with transverse recesses.
  • a method for drying tobacco in which the tobacco is continuously conveyed through a drying zone and is thereby subjected to a heat treatment.
  • This process saves energy and does not impair the operation of the dryer and the heater, in that the water vapor escaping from the tobacco in the form of warm vapors is fed to the evaporator of a refrigerant circuit and condensed there.
  • the water vapor gives off heat of condensation to the refrigerant, and the refrigerant is condensed in the area of the drying zone.
  • the heat of condensation released by the refrigerant is used for the heat treatment of the tobacco.
  • the object of the invention is to create a multi-chamber vacuum belt dryer in which the product to be dried is preferably two chambers passes through with different pressure ratios, whereby it is ensured that the water vapor partial pressure of the second chamber is not influenced by the partial pressure at the inlet point of the product.
  • the multi-chamber vacuum belt dryer shown in Figure 1 is used for drying solids.
  • a cylindrical, lying container 1 which is closed on both sides by gates 2, four conveyor belts 3 are arranged one above the other.
  • the belts 3 are spaced apart from one another in height and offset in length relative to one another and are driven by external drive device 4.
  • the container 1 has an inlet nozzle 5 on top and an outlet nozzle 6 on the bottom, which are provided in the region of a container end.
  • a number of plate-shaped heating elements 7 are arranged side by side so that the upper run is in contact with the upper side of the heating elements 7 in order to transmit the thermal energy via the upper run in the product.
  • Plate-shaped cooling elements 8 are arranged next to one another between the lower conveyor belts in order to transmit the cooling energy to the upper run or the product, similarly to the heating elements.
  • An entry lock 11 is connected to the inlet connection 5.
  • the pressure in the entry lock 11 is generated by a vacuum device 19.
  • This entry lock comprises an inlet container 13, a flap 14 connected downstream of the latter, which has a pneumatic drive device 15, an intermediate container 16 and a second flap 17, which connects the intermediate container 16 to the inlet connector 5, and a pneumatic one Has drive device 18.
  • the inlet connection 5 is combined with a metering device in order to distribute the product evenly over the top belt.
  • a discharge lock 20 is mounted on the outlet nozzle 6 in order to discharge the dried material.
  • the discharge lock 20 comprises an intermediate container 21 which is connected to the outlet nozzle 6, a first flap 22 which is connected downstream of the intermediate container and contains a pneumatic drive device 23, a discharge container 24 which is connected downstream of the flap 22 and a discharge flap 25 with a pneumatic drive device 26.
  • the pressure in the discharge lock 20 is generated by a vacuum device 27.
  • the interior of the container is divided into at least two chambers 31, 32, which are referred to as pre- and post-stages.
  • a partition 33 is arranged in the container.
  • the partition wall 33 extends in the longitudinal direction of the container and is sealed at the gates 2 by means of a sealing device (not shown).
  • a cellular wheel 34 is installed in the partition wall 33, via which the chambers 31, 32 are connected.
  • the pressure in the pre- and post-stage is generated in each case via a vacuum device 35 or 36, this vacuum device 35, 36 being connected via a control line 37. Furthermore, a number of heat transfer elements 38 are arranged in the two chambers 31, 32, each of which is connected to a heat generating device 39, 40, so that the elements 38 can be used to heat or cool in each chamber.
  • a liquid product is introduced into the first chamber 31.
  • a pipeline system 41 is provided, which is connected to a feed pump, not shown.
  • the pressure in the chambers 31, 32 is generated by means of the same devices as in the embodiment according to FIG. 1.
  • thermal energy for the first Chamber generated in five separate stages by means of heat transfer element 47 and controlled by separate control devices 42,43,44,45,46.
  • Heat is generated for the second chamber by the same devices as in the embodiment according to FIG. 1.
  • a stripping device 48 is also mounted above the cellular wheel 34 in order to break off the hardened intermediate product from the conveyor belts in the first chamber 31.
  • the discharge lock 20 is designed in the same way as in the vacuum belt dryer described at the beginning.

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)
EP92100964A 1991-03-25 1992-01-22 Differenziell gepumpter Mehrkammer-Vakuumbandtrockner Expired - Lifetime EP0505677B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH900/91 1991-03-25
CH90091A CH680818A5 (enrdf_load_stackoverflow) 1991-03-25 1991-03-25

Publications (2)

Publication Number Publication Date
EP0505677A1 EP0505677A1 (de) 1992-09-30
EP0505677B1 true EP0505677B1 (de) 1995-01-04

Family

ID=4197798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100964A Expired - Lifetime EP0505677B1 (de) 1991-03-25 1992-01-22 Differenziell gepumpter Mehrkammer-Vakuumbandtrockner

Country Status (3)

Country Link
EP (1) EP0505677B1 (enrdf_load_stackoverflow)
CH (1) CH680818A5 (enrdf_load_stackoverflow)
DE (1) DE59201111D1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9273901B2 (en) 2011-07-19 2016-03-01 Enwave Corporation Microwave vacuum-drying of organic materials

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012107368B4 (de) 2012-08-10 2016-06-30 Peter Trieb Zweikammer-Wäschetrockner mit Wärmepumpe und Unterdruckpumpe sowie Verfahren zur Trocknung
WO2021243571A1 (zh) * 2020-06-02 2021-12-09 李桂军 一种皮革生产用烘干热量回收装置
DE102020129945B4 (de) 2020-11-12 2023-12-07 Natalie Gesch Trockner zum Trocknen von Trockengut, insbesondere Textilien
CN117029420B (zh) * 2023-08-22 2024-02-13 苏州贝茵佳智能科技有限公司 一种微生物剂检测实验用真空干燥箱及其使用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1202041A (fr) * 1958-09-09 1960-01-07 Dispositif de fabrication de pâtes alimentaires avec préséchage sous vide
US3206866A (en) * 1963-02-07 1965-09-21 Magma Power Co Method and apparatus for dehydrating foods employing geothermal steam
IT1086432B (it) * 1976-10-18 1985-05-28 Tomadini Gino Metodo e relativo impianto di essicazione ad elementi componibili per l'essicazione di paste alimentari tagliate e lunghe ad alte temperature
DE3221602A1 (de) * 1981-06-27 1983-01-13 Hauni-Werke Körber & Co KG, 2050 Hamburg Verfahren und vorrichtung zum trocknen von tabak
CH660228A5 (de) * 1982-08-23 1987-03-31 Zschokke Wartmann Ag Verfahren und trocknungsanlage zum trocknen eines stoffes im chargenbetrieb.
ATE49468T1 (de) * 1985-06-29 1990-01-15 Braunschweigische Masch Bau Dampftrockner fuer abgepresstes faseriges gut.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Chemie-Technik 14 (1985), Heft 7, J.C. Aigeldinger, F.W. Hauri "Neue Erkenntnisse bei der kontinuierlichen und chargenweisen Vakuumbandtrocknung", Seiten 32-34 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9273901B2 (en) 2011-07-19 2016-03-01 Enwave Corporation Microwave vacuum-drying of organic materials

Also Published As

Publication number Publication date
CH680818A5 (enrdf_load_stackoverflow) 1992-11-13
DE59201111D1 (de) 1995-02-16
EP0505677A1 (de) 1992-09-30

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