EP0505677B1 - Séchoir à tapis comportant plusieurs compartiments à vide avec pompage différentiel - Google Patents
Séchoir à tapis comportant plusieurs compartiments à vide avec pompage différentiel Download PDFInfo
- 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
Links
Images
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.
Claims (7)
- Séchoir à bandes et à dépression, muni d'une cuve (1) qui présente une admission (5) et une sortis (6), comprenant au moins uns bande transporteuse (3) logée dans l'espace interne de la cuve ; un dispositif (35, 36) pour engendrer une dépression dans l'espace interne de la cuve ; et un dispositif de chauffage (7) et/ou de refroidissement (8) de l'espace interne de la cuve, en vue de créer les conditions de pression nécessaires, caractérisé par une cloison séparatrice (33) qui subdivise l'espace interne de la cuve en deux compartiments (31, 32), chaque compartiment renfermant au moins une bande transporteuse (3) ; un sas (34), intégré dans la cloison séparatrice (33) et reliant les deux compartiments (31, 32) ; et un second dispositif de dépression (36) et un second dispositif de chauffage/refroidissement (40, 39) qui sont raccordés au second compartiment (32), afin d'établir des conditions de pression différentes dans les deux compartiments (31, 32).
- Séchoir à bandes et à dépression, salon la revendication 1, caractérisé par le fait que de multiples bandes transporteuses (3) sont disposées dans chaque compartiment (31, 32).
- Séchoir à bandes et à dépression, selon l'une des revendications 1 ou 2, caractérisé par le fait que la cloison séparatrice (33) est agencée transversalement ou parallèlement au sens de défilement des bandes transporteuses.
- Séchoir à bandes et à dépression, selon l'une des revendications 1 à 3, caractérisé par le fait que le sas est une roue cellulaire (34).
- Séchoir à bandes et à dépression, selon l'une des revendications 1 à 4, caractérisé par un dispositif (11) de chargement du produit devant être séché, qui débouche dans le premier compartiment (31) ; et par un dispositif (20) d'évacuation du produit séché, qui débouche dans le second compartiment (32).
- Séchoir à bandes et à dépression, salon la revendication 5, caractérisé par la fait que le dispositif de chargement (11) et le dispositif d'évacuation (20) sont agencés, de préférence, en vis-à-vis l'un de l'autre sur la cuve (1).
- Séchoir à bandes et à dépression, selon la revendication 5, caractérisé par le fait qu'un dispositif (19, 27) de génération d'une dépression est respectivement affecté au dispositif de chargement (11) et au dispositif d'évacuation (20), afin de créer des conditions de pression correspondantes, dans les compartiments, lors du déversement du produit devant être séché et lors de l'évacuation du produit séché.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH90091A CH680818A5 (fr) | 1991-03-25 | 1991-03-25 | |
CH900/91 | 1991-03-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0505677A1 EP0505677A1 (fr) | 1992-09-30 |
EP0505677B1 true EP0505677B1 (fr) | 1995-01-04 |
Family
ID=4197798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92100964A Expired - Lifetime EP0505677B1 (fr) | 1991-03-25 | 1992-01-22 | Séchoir à tapis comportant plusieurs compartiments à vide avec pompage différentiel |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0505677B1 (fr) |
CH (1) | CH680818A5 (fr) |
DE (1) | DE59201111D1 (fr) |
Cited By (1)
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)
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 (fr) * | 2020-06-02 | 2021-12-09 | 李桂军 | Appareil de récupération de chaleur de séchage pour la production de cuir |
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)
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. |
DE3575344D1 (de) * | 1985-06-29 | 1990-02-15 | Braunschweigische Masch Bau | Dampftrockner fuer abgepresstes faseriges gut. |
-
1991
- 1991-03-25 CH CH90091A patent/CH680818A5/de not_active IP Right Cessation
-
1992
- 1992-01-22 DE DE59201111T patent/DE59201111D1/de not_active Expired - Fee Related
- 1992-01-22 EP EP92100964A patent/EP0505677B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
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)
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 |
---|---|
EP0505677A1 (fr) | 1992-09-30 |
DE59201111D1 (de) | 1995-02-16 |
CH680818A5 (fr) | 1992-11-13 |
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