EP0505677B1 - Differentially pumped multiple chamber vacuum belt dryer - Google Patents
Differentially pumped multiple chamber vacuum belt dryer 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
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 230000001413 cellular effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 4
- 238000001035 drying Methods 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 241000208125 Nicotiana Species 0.000 description 4
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000015927 pasta Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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.
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)
Description
Die vorliegende Erfindung betrifft einen Vakuumbandtrockner gemäss dem Oberbegriff des Anspruches 1.The present invention relates to a vacuum belt dryer according to the preamble of
Ein derartiger Vakuumbandtrockner ist aus der DE- Zeitschrift CHEMIE-TECHNIK 14 (1985), Heft 7, Seiten 32-34 "Neue Erkenntnisse bei der kontinuierlichen und chargenweisen Vakuumbandtrocknung" bekannte. Er enthält einen liegend angeordneten zylindrischen Behälter, der einen Ein- und Auslass aufweist und beidseitig durch Tore geschlossen ist, eines oder mehrere Transportbänder, welche in Längsrichtung des Behälters angeordnet sind und sich vom Einlass zum Auslass erstrecken, eine Einrichtung zum Erzeugen eines Vakuums im Behälter, um die Druckverhältnisse im Behälterinnenraum herzustellen sowie eine Einrichtung zum Heizen und/oder Kühlen des Produktes.Such a vacuum belt dryer is known from DE magazine CHEMIE-TECHNIK 14 (1985),
Nachteil der bis heute angewandten Konstruktion ist die Begrenzung der erreichbaren Produktendfeuchte durch die primär eingebrachte Feuchtigkeit. In dem Einkammer-Vakuumbandtrockner bildet sich ein Niveau des Wasserdampf-Partialdruckes aus, dessen Höhe bei gegebener Saugleistung des Vakuum- Pumpstandes von der Feuchtigkeit des eingebrachten Produktes bestimmt wird.The disadvantage of the design used up to now is the limitation of the attainable final product moisture due to the primarily introduced moisture. In the single-chamber vacuum belt dryer, a level of the water vapor partial pressure forms, the level of which is determined by the moisture of the introduced product for a given suction power of the vacuum pumping station.
Aus FR-A- 2'368'000 (G. Tomadini) ist ein Verfahren zur Hochtemperatur- Trocknung von langen oder gebrochenen Teigwaren bekannt, welches mittels einer Trocknungsanlage mit zusammengesetzten Elementen arbeitet. Unter Verwendung laufender Bänder zum Transport der zu trocknenden Teigwaren ist die Trocknungsanlage teilweise oder ganz ausgerüstet mit vibrierenden Laufbändern, welche mit querliegenden Ausnehmungen versehen sind.From 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. Under use conveyor belts for transporting the pasta to be dried, the drying system is partially or completely equipped with vibrating conveyor belts, which are provided with transverse recesses.
Weiterhin ist aus DE-A- 3'221'602 (Hauni-Werke) ein Verfahren zum Trocknen von Tabak bekannt, bei dem der Tabak stetig durch eine Trockenzone gefördert und dabei einer Wärmebehandlung unterworfen wird. Dieses Verfahren arbeitet energiesparend und ohne Beeinträchtigung des Betriebes des Trockners und der Heizung, indem der bei der Wärmebehandlung aus dem Tabak austretende Wasserdampf in Form von warmen Brüden dem Verdampfer eines Kältemittel-Kreislaufes zugeführt und dort kondensiert wird. Dabei gibt der Wasserdampf Kondensationswärme an das Kältemittel ab, und das Kältemittel wird im Bereich der Trockenzone kondensiert. Die hierbei freiwerdende Kondensationswärme des Kältemittels wird für die Wärmebehandlung des Tabaks genutzt.Furthermore, from DE-A-3'221'602 (Hauni-Werke) a method for drying tobacco is known 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.
Ausgehend von dem aus der DE- Zeitschrift CHEMIE-TECHNIK 14 (1985), Heft 7, Seiten 32-34 bekannten Einkammer-Vakuumbandtrockner liegt der Erfindung die Aufgabe zugrunde, einen Mehrkammer- Vakuumbandtrockner zu schaffen, bei dem das zu trocknende Produkt vorzugsweise zwei Kammern mit unterschiedlichen Druckverhältnissen durchläuft, wobei sichergestellt ist, dass der Wasserdampfpartialdruck der zweiten Kammer vom Partialdruck am Einlassort des Produktes nicht beeiflusst wird.Starting from the single-chamber vacuum belt dryer known from DE magazine CHEMIE-TECHNIK 14 (1985),
Die mit der Erfindung erreichbaren Vorteile sind im wesentlichen darin zu sehen, dass die Verhältnisse ebenso für Lösungsmittel gelten, falls das Produkt von diesen durch Trocknung befreit werden soll und dass insbesondere ein niedriger Endfeuchte- Gehalt bzw. Lösungsmittel-Restgehalt erreicht wird.The advantages achievable with the invention are essentially to be seen in the fact that the conditions also apply to solvents if the product is to be freed from them by drying and that in particular a low final moisture content or residual solvent content is achieved.
Im folgenden wird die Erfindung anhand der beiliegenden Zeichnungen näher erläutert.The invention is explained in more detail below with reference to the accompanying drawings.
Es zeigen:
Figur 1 ein Blockschema einer Ausführungsform eines erfindungsgemässen Mehrkammer-Vakuumbandtrockners mit Feststoffeintrag, undFigur 2 ein Blockschema einer Ausführungsform eines erfindungsgmeässen Mehrkammer-Vakuumbandtrockners mit Flüssigeintrag.
- Figure 1 is a block diagram of an embodiment of a multi-chamber vacuum belt dryer according to the invention with solid entry, and
- Figure 2 is a block diagram of an embodiment of an inventive multi-chamber vacuum belt dryer with liquid entry.
Der in Figur 1 dargestellte Mehrkammer-Vakuumbandtrockner wird zum Trocknen von Feststoffen verwendet. In einem zylindrischen, liegenden Behälter 1, der beidseitig durch Tore 2 abgeschlossen ist, sind vier Förderbänder 3 übereinanderliegend angeordnet. Die Bänder 3 sind in der Höhe zueinander beabstandet und in der Länge zueinander versetzt montiert und werden durch aussenliegende Antriebsvorrichtung 4 angetrieben. Der Behälter 1 weist einen obenliegenden Einlassstutzen 5 und einen untenliegenden Auslassstutzen 6 auf, die im Bereich eines Behälterendes vorgesehen sind. Dadurch erfolgt die Zufuhr des zu trocknenden Gutes von oben und die Abgabe des getrockneten Gutes nach unten.The multi-chamber vacuum belt dryer shown in Figure 1 is used for drying solids. In a cylindrical, lying
Zwischen dem oberen und unteren Trum der zwei obenliegenden Förderbänder 3 sind eine Anzahl von plattenförmigen Heizelementen 7 nebeneinanderliegend so angeordnet, dass das obere Trum mit der Oberseite der Heizelemenete 7 in Kontakt steht, um die Wärmeenergie via das obere Trum im Produkt zu übertragen. Zwischen den unteren Förderbändern sind plattenförmige Kühlelemente 8 nebeneinanderliegend angeordnet, um ähnlich wie bei den Heizelementen die Kälteenergie auf das obere Trum bzw. das Produkt zu übertragen.Between the upper and lower run of the two
Am Einlassstutzen 5 ist eine Eintragschleuse 11 angeschlossen. Der Druck in der Eintragschleuse 11 wird durch eine Vakuumeinrichtung 19 erzeugt. Diese Eintragschleuse umfasst einen Einlassbehälter 13, eine dem letzteren nachgeschaltete Klappe 14, die eine pneumatische Antriebseinrichtung 15 hat, einen Zwischenbehälter 16 und eine zweite Klappe 17, die den Zwischenbehälter 16 mit dem Einlassstutzen 5 verbindet und eine pneumatische Antriebseinrichtung 18 aufweist. Der Einlassstutzen 5 ist kombiniert mit einer Dosiervorrichtung, um das Produkt gleichmässig auf das oberste Band zu verteilen.An entry lock 11 is connected to the
Am Auslassstutzen 6 ist eine Austragschleuse 20 montiert, um das getrocknete Gut auszutragen. Die Austragschleuse 20 umfasst einen Zwischenbehälter 21, der am Auslassstutzen 6 angeschlossen ist, eine erste Klappe 22, die dem Zwischenbehälter nachgeschaltet ist und eine pneumatische Antriebseinrichtung 23 enthält, ein Abgabebehälter 24, der der Klappe 22 nachgeschaltet ist und eine Austragklappe 25 mit einer pneumatischen Antriebseinrichtung 26. Der Druck in der Austragschleuse 20 wird durch eine Vakuumeinrichtung 27 erzeugt.A
Der Innenraum des Behälters ist in mindestens zwei Kammern 31,32 unterteilt, die als Vor- bzw. Nachstufe bezeichnet werden.The interior of the container is divided into at least two
Zu diesem Zweck ist eine Trennwand 33 in dem Behälter angeordnet. Die Trennwand 33 erstreckt sich in Längsrichtung des Behälters und ist mittels Dichtungseinrichtung (nicht gezeigt) an den Toren 2 abgedichtet. Ferner ist ein Zellenrad 34 in der Trennwand 33 eingebaut, über welches die Kammern 31,32 verbunden sind.For this purpose, a
Der Druck in der Vor- und Nachstufe wird jeweils über eine Vakuumeinrichtung 35 bzw. 36 erzeugt, wobei diese Vakuumeinrichtung 35,36 über eine Steuerleitung 37 verbunden sind. Ferner sind eine Anzahl von Wärmeübertragungselementen 38 in den zwei Kammern 31,32 angeordnet, die jeweils an eine Wärmeerzeugungseinrichtung 39,40 angeschlossen sind, so dass in jeder Kammer durch die Elemente 38 erwärmt oder gekühlt werden kann.The pressure in the pre- and post-stage is generated in each case via a
Bei der Ausführungsform nach Figur 2 wird ein flüssiges Produkt in die erste Kammer 31 eingebracht. Hierzu ist ein Rohrleitungssystem 41 vorgesehen, das mit einer nicht dargestellten Speisepumpe verbunden ist.In the embodiment according to FIG. 2, a liquid product is introduced into the
Der Druck in den Kammern 31,32 wird mittels den gleichen Einrichtungen wie bei der Ausführungsform nach Figur 1 erzeugt.The pressure in the
Ferner wird die Wärmeenergie für die erste Kammer in fünf getrennten Stufen mittels Wärmeübertragungselement 47 erzeugt und durch separate Steuereinrichtungen 42,43,44,45,46 gesteuert.Furthermore, the thermal energy for the first Chamber generated in five separate stages by means of
Die Wärmeerzeugung für die zweite Kammer erfolgt durch die gleichen Einrichtungen wie bei der Ausführungsform nach Figur 1.Heat is generated for the second chamber by the same devices as in the embodiment according to FIG. 1.
In der ersten Kammer 31 ist ferner eine Abstreifeinrichtung 48 oberhalb des Zellenrades 34 montiert, um das erhärtete Zwischenprodukt von den Förderbändern in der ersten Kammer 31 abzubrechen.In the
Die Austragschleuse 20 ist gleich ausgeführt wie bei dem eingangs beschriebenen Vakuumbandtrockner.The
Claims (7)
- Vacuum belt dryer comprising a container (1) having an intake (5) and an outlet (6), at least one conveying belt (3) located within the container, a device (35, 36) for creating a vacuum within the container, and a device for heating (7) and/or cooling (8) the inner space of the container to provide the required pressure conditions, characterised by a separating wall (33) subdividing the inner space of the container in two chambers (31, 32), each chamber comprising at least one conveying belt (3), a lock (34) located in the separating wall (33) and connecting the two chambers (31, 32), and a second device (36) for creating vacuum and a second device (40, 39) for heating/cooling, both working on the second chamber (32) for providing different pressure conditions within the two chambers (31, 32).
- Vacuum belt dryer according to claim 1, characterised in that a plurality of conveying belts (3) are mounted within each chamber (31, 32).
- Vacuum belt dryer according to one of claims 1 or 2, characterised in that the separating wall (33) is arranged along or transversely to the moving direction of the conveying belts.
- Vacuum belt dryer according to one of claims 1 to 3, characterised in that the lock is a cellular wheel sluice (34).
- Vacuum belt dryer according to one of claims 1 to 4, characterised by a charging device (11) for the product to be dried for charging the first chamber (31) and by a discharging device (20) for the dried product connected to the second chamber (32).
- Vacuum belt dryer according to claim 5, characterised in that the charging device (11) and the discharging device (20) are arranged at the container (1) preferentially opposite to each other.
- Vacuum belt dryer according to claim 5, characterised in that a device (19, 27) for creating a vacuum is allocated to each of the charging device (11) and the discharging device (20) to provide pressure conditions corresponding to the chambers while charging the product to be dried and discharging the dried product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH90091A CH680818A5 (en) | 1991-03-25 | 1991-03-25 | |
| CH900/91 | 1991-03-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0505677A1 EP0505677A1 (en) | 1992-09-30 |
| EP0505677B1 true EP0505677B1 (en) | 1995-01-04 |
Family
ID=4197798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92100964A Expired - Lifetime EP0505677B1 (en) | 1991-03-25 | 1992-01-22 | Differentially pumped multiple chamber vacuum belt dryer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0505677B1 (en) |
| CH (1) | CH680818A5 (en) |
| DE (1) | DE59201111D1 (en) |
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 (en) | 2012-08-10 | 2016-06-30 | Peter Trieb | Two-chamber clothes dryer with heat pump and vacuum pump as well as drying process |
| WO2021243571A1 (en) * | 2020-06-02 | 2021-12-09 | 李桂军 | Drying heat recovery apparatus for leather production |
| DE102020129945B4 (en) | 2020-11-12 | 2023-12-07 | Natalie Gesch | Dryer for drying dry goods, especially textiles |
| CN117029420B (en) * | 2023-08-22 | 2024-02-13 | 苏州贝茵佳智能科技有限公司 | Vacuum drying oven for microbial agent detection experiment and use method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1202041A (en) * | 1958-09-09 | 1960-01-07 | Device for making pasta with vacuum pre-drying | |
| US3206866A (en) * | 1963-02-07 | 1965-09-21 | Magma Power Co | Method and apparatus for dehydrating foods employing geothermal steam |
| IT1086432B (en) * | 1976-10-18 | 1985-05-28 | Tomadini Gino | METHOD AND RELATED DRYING SYSTEM WITH MODULAR ELEMENTS FOR THE DRYING OF HIGH-TEMPERATURE CUT AND LONG FOOD PASTA |
| DE3221602A1 (en) * | 1981-06-27 | 1983-01-13 | Hauni-Werke Körber & Co KG, 2050 Hamburg | Process and device for drying tobacco |
| CH660228A5 (en) * | 1982-08-23 | 1987-03-31 | Zschokke Wartmann Ag | METHOD AND DRYING SYSTEM FOR DRYING A SUBSTANCE IN BATCH OPERATION. |
| ATE49468T1 (en) * | 1985-06-29 | 1990-01-15 | Braunschweigische Masch Bau | STEAM DRYERS FOR PRESSED FIBROUS GOODS. |
-
1991
- 1991-03-25 CH CH90091A patent/CH680818A5/de not_active IP Right Cessation
-
1992
- 1992-01-22 EP EP92100964A patent/EP0505677B1/en not_active Expired - Lifetime
- 1992-01-22 DE DE59201111T patent/DE59201111D1/en not_active Expired - Fee Related
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 |
|---|---|
| DE59201111D1 (en) | 1995-02-16 |
| CH680818A5 (en) | 1992-11-13 |
| EP0505677A1 (en) | 1992-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0242873B1 (en) | Process for treating tobacco and similar organic materials | |
| DE69215477T2 (en) | Device for drying powdery or granular material | |
| DE60217183T2 (en) | DEVICE FOR DRYING A PARTICULAR PRODUCT WITH OVERHEATED STEAM | |
| EP0505677B1 (en) | Differentially pumped multiple chamber vacuum belt dryer | |
| DE2100248C3 (en) | Device for heat, cold and / or material treatment of granular, free-flowing goods | |
| DE10005165B4 (en) | Method and device for drying pre-dewatered liquid to moist substances | |
| DE3616966C2 (en) | ||
| EP0356388B1 (en) | Process and apparatus for dehydrating water-containing masses | |
| DE2855492A1 (en) | METHOD AND DRYER FOR CONTINUOUS DRYING OF GETREIDE O.AE. GIANT, GOOD | |
| DE2248051A1 (en) | PROCEDURE FOR CONTINUOUS DRYING OF DRIP SOAPS, GRAINY AND / OR PARTICULAR GOODS AND DEVICE FOR PERFORMING THE PROCESS | |
| EP0167939A1 (en) | Device for the treatment of material to separate the fluid parts from the solid parts | |
| DE3221602A1 (en) | Process and device for drying tobacco | |
| WO2011101316A1 (en) | Lock for transferring a workpiece between an outer zone and an inner zone of a workpiece treatment area | |
| DE2434292A1 (en) | INSERTION DEVICE | |
| CH660286A5 (en) | PLANT AND THEIR USE FOR DRYING TOBACCO PARTICLES. | |
| DE4019375A1 (en) | Indirectly-heated vacuum dryer esp. for agricultural prods. | |
| DE2607504A1 (en) | Continuous drier for pieces or webs of thin material - has vacuum chamber with perforated upper plate | |
| DE102006012577A1 (en) | Drying device for tobacco | |
| EP0222925B1 (en) | Steam dryer for compressed fibrous material | |
| EP0018607B1 (en) | Method and device for pregrinding cocoa nibs | |
| EP0255555A1 (en) | Apparatus for continuously washing a felted fibrous material, more particularly comminuted sugar cane | |
| DE3902679A1 (en) | METHOD AND DEVICE FOR THE CONTINUOUS TREATMENT OF VEGETABLE PRODUCTS, LIKE BEANS, IN PARTICULAR COCOA BEANS, SEEDS, GRAINS AND THE LIKE. | |
| DE3826273C2 (en) | ||
| DE2840899C3 (en) | Electric dryer for drying dielectric granules | |
| EP0437832A1 (en) | Washing machine for pipes and the like |
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 |
|
| 17P | Request for examination filed |
Effective date: 19920122 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR LI NL |
|
| 17Q | First examination report despatched |
Effective date: 19940314 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR LI NL |
|
| ET | Fr: translation filed | ||
| REF | Corresponds to: |
Ref document number: 59201111 Country of ref document: DE Date of ref document: 19950216 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19950427 Year of fee payment: 4 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19951219 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19951221 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19951223 Year of fee payment: 5 |
|
| 26N | No opposition filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19960131 Ref country code: CH Effective date: 19960131 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970801 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19970930 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19970801 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19971001 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |