EP0116565B1 - Trocknungsanlage zum trocken eines stoffes im chargenbetrieb - Google Patents

Trocknungsanlage zum trocken eines stoffes im chargenbetrieb Download PDF

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Publication number
EP0116565B1
EP0116565B1 EP83902238A EP83902238A EP0116565B1 EP 0116565 B1 EP0116565 B1 EP 0116565B1 EP 83902238 A EP83902238 A EP 83902238A EP 83902238 A EP83902238 A EP 83902238A EP 0116565 B1 EP0116565 B1 EP 0116565B1
Authority
EP
European Patent Office
Prior art keywords
drying
belts
dried
chamber
pct
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
Application number
EP83902238A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0116565A1 (de
Inventor
Stephan Brander
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.)
Zschokke Wartmann AG
Original Assignee
Zschokke Wartmann 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 Zschokke Wartmann AG filed Critical Zschokke Wartmann AG
Priority to AT83902238T priority Critical patent/ATE18796T1/de
Publication of EP0116565A1 publication Critical patent/EP0116565A1/de
Application granted granted Critical
Publication of EP0116565B1 publication Critical patent/EP0116565B1/de
Expired 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
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
    • 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 invention relates to a drying system, in particular a vacuum drying cabinet, for drying a substance in batch operation in a closed drying room with supply of heat with at least one drying surface extending over the depth of the drying room.
  • Drying fabrics i.e. H.
  • the removal of moisture from all kinds of substances is a frequently used process engineering process, with the help of which the substances are to be preserved or brought into a condition suitable for transport and further processing.
  • drying with the addition of artificial heat is a frequently used method.
  • the dry material is directly hot gases, e.g. B. exposed to fire gases, while in the indirect drying process, which is used especially for sensitive dry goods, the drying with air or water heated by heat exchangers or the like.
  • the present invention relates to an indirect drying process which is carried out with a drying system suitable for this.
  • a drying system suitable for this is known in two versions.
  • the drying system is designed as a drying cabinet.
  • the drying cabinet is a closed chamber, in the interior of which heating plates are arranged in several layers, which are heated by a heat transfer medium.
  • the fabric to be dried e.g. B. manually or with a feeder, distributed on trays that are placed in the drying cabinet.
  • the batch introduced in this way is dried with the addition of heat, the internal pressure being reduced to vacuum and adaptable to the drying process. After drying is complete, the batch distributed in the trays is removed from the drying cabinet and the batch is prepared for drying the next batch.
  • the drying process can be ideally controlled by adjusting the temperature and pressure.
  • the investment costs are also relatively low.
  • the cost of keeping the drying cabinet clean is also high.
  • substances of any kind i.e. H. Material from a thin to lumpy state, can be dried.
  • Another known drying system is the belt dryer, which can also be designed as a vacuum belt dryer.
  • a pressure-resistant chamber is also used here, in which heating plates are located in several layers one above the other and in several zones one behind the other, usually four or more zones.
  • the heating plates lie below the upper run of endless belts, which are guided over a drive roller and a deflection roller and can be driven by a motor.
  • the substance to be dried is fed into the interior of the chamber by means of a metering device and distributed evenly over the belts.
  • the fabric is transported according to the movement of the belts from the first zone to the zones behind, the temperature conditions being set differently in each zone, so that the fabric is gradually heated and dried.
  • the dried product stands freely on the deflection roller of the rearmost zone and can be removed from the belt, e.g. B. by canceling.
  • the printing conditions, e.g. B. maintaining a vacuum, but in the chamber are the same for all drying zones of the belt dryer.
  • the advantage of the belt dryer is that it has a larger capacity than the batch-operated drying cabinet, that it enables continuous operation and can therefore also be operated automatically with reasonable effort. In addition, the operating effort and hygiene or cleaning effort is low. It is disadvantageous, however, that not any, in particular no viscous and lumpy materials can be dried in the belt dryer, but rather are limited to pumpable and free-flowing materials.
  • drying system for example, in FR-A-2402171, in which, before the actual drying process is initiated, the substance to be dried is applied to a drying surface, introduced into a drying room and distributed on the drying surface by means of conveying means.
  • the material to be dried is located on a roller here, with a counter roller and a vacuum accelerating the drying process. This requires considerable expenditure on drying equipment, on the other hand, a relatively small amount of material to be dried can always be applied to a roller.
  • the object of the present invention should now be to combine the advantages of the drying cabinet with some advantages of the belt dryer and thus also to enable the drying of thin and lumpy materials.
  • the drying surface is formed by a conveyor belt, to which a loading device or a metering device for the substance to be dried is assigned and which to the distribution serves the substance, but it stands still during the drying operation.
  • the drying system shown in FIGS. 1 and 2 has a chamber 1 which is designed as a pressure-resistant or vacuum-proof shell. At least on one end face, the chamber 1 has a cover 2, which can be removed if necessary and thereby enables access to the chamber 1.
  • heating plates 3 are arranged one above the other, but the number of heating plates 3 can also be larger or smaller. With their arrangement in a single zone, this corresponds to the arrangement in a drying cabinet, in which stationary, superimposed drying surfaces 4 are provided, on which the substance to be dried is stored in suitable holding devices, which are provided and introduced as a batch before drying and after drying removed as such from the drying cabinet.
  • FIGS. 1 and 2 these are movable belts 5, which also form the stationary drying surfaces 4.
  • the belts 5 are designed as endless belts and are guided over a drive roller 6 and a deflection roller 5.
  • the rollers 6, 7 are mounted in a manner not shown either in a frame supported in the chamber 1 or in the chamber wall, the drive rollers 6 being able to be driven in various ways. Either all drive rollers 6 are driven simultaneously, or only a single drive roller 6 is driven in succession, so that the belts 5 are moved in succession. During the drying process, however, all of the belts 5 stand still.
  • the drying cabinet according to FIG. 1 for drying a pumpable substance, the same is guided through a line 9 into the interior of the chamber 1 by a conveyor system symbolized by an arrow 8.
  • This loading device can be installed permanently or can be moved to the belts by the opened dryer.
  • Branches 10 go from line 9 to the individual belts 5 or successive loading of the belts one after the other. Only one nozzle is used, which covers the strips one after the other.
  • the belts 5 are set in motion, so that the material emerging from the mouths of the branches 10 is distributed both in the width of the belts 5 and in the length of the drying surface 4.
  • the belts 5 are stopped; The drying operation is now carried out as in a drying cabinet, the temperature and pressure profile being set in accordance with the substance to be dried.
  • the loading device of the strips 5 is indicated by an arrow 11.
  • the belts are moved in the direction of arrow 12 or 11 in the opposite direction or in the same direction of movement as when loading the drying surface 4, the dried material being thrown off at the drive rollers 7 and through a discharge opening 13 which, depending on the system, is on the opposite side of the loading or loading Side is arranged, which is provided for example with a lock 14, is discharged from the drying chamber.
  • a suitable extendable discharge vessel can also be arranged within the vacuum space.
  • the line 9 with the branches 10 can be raised so far and can be used to break the dried substance into pieces, so that the dried substance can be thrown off unhindered.
  • a free-flowing material 11 is processed in the chamber 1. which is entered by a schematically represented cellular wheel 15.
  • This metering device can be arranged in a fixed or mobile manner in the same way as the entry device for liquid products.
  • the heating plates 3 and the drying surfaces 4 formed by the belts 5 are arranged alternately offset.
  • the bands 5 move alternately in opposite directions according to the arrows 16, 17. so the free-flowing material applied to the uppermost band 5 is deposited on the beginning of the band 5 below, from where it returns to the beginning of the next band 5 below, and so on, until the material reaches the end of the bottom band 5, whereupon the bands 5 are stopped and the drying process starts on the stationary drying surfaces.
  • the belts are moved in the same arrow directions 16, 17 so that the dried substance can be discharged, for example, through the discharge opening 13 and the lock 14.
  • another can be used instead of the lock; e.g. B. extendable discharge vessel can be arranged within the vacuum space.
  • the system is available for drying the next batch immediately after the material has been discharged supply.
  • the belts in the drying chamber according to FIG. 2 are only moved until the loading of the drying surface with the substance to be dried has ended or after the drying process has finished, the dried substance has been discharged.
  • a further advantage of the drying chamber according to FIGS. 1 and 2 is that, in addition to automatic loading by means of devices of any type, manual loading is also possible for substances which are particularly difficult to treat, for which purpose the lid 2 can be opened.
  • one belt 5 can be moved and loaded in the drying chamber according to FIG. 1, but all belts 5 can also be moved and loaded at the same time.
  • loading can be carried out in the same way , however, in most cases the loading will be carried out from top to bottom with belts 5 running in opposite directions.
  • line connections 18, 19 are provided for the introduction and discharge of the heat transfer medium for the heating plates 3.
  • Another line connection 20 is used to connect a vacuum generator, for example jet or water ring pumps.
  • the material for the conveyor belts 5 is steel or plastic, e.g. B. PTFE, can be used. With the drying systems described, practically all materials can be dried, as in the known drying cabinet, with the exception of very thin liquids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
EP83902238A 1982-08-23 1983-07-27 Trocknungsanlage zum trocken eines stoffes im chargenbetrieb Expired EP0116565B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83902238T ATE18796T1 (de) 1982-08-23 1983-07-27 Trocknungsanlage zum trocken eines stoffes im chargenbetrieb.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5006/82A CH660228A5 (de) 1982-08-23 1982-08-23 Verfahren und trocknungsanlage zum trocknen eines stoffes im chargenbetrieb.
CH5006/82 1982-08-23

Publications (2)

Publication Number Publication Date
EP0116565A1 EP0116565A1 (de) 1984-08-29
EP0116565B1 true EP0116565B1 (de) 1986-03-26

Family

ID=4286316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83902238A Expired EP0116565B1 (de) 1982-08-23 1983-07-27 Trocknungsanlage zum trocken eines stoffes im chargenbetrieb

Country Status (11)

Country Link
US (1) US4574495A (da)
EP (1) EP0116565B1 (da)
JP (1) JPS59501419A (da)
AT (1) ATE18796T1 (da)
CA (1) CA1226131A (da)
CH (1) CH660228A5 (da)
DE (1) DE3362690D1 (da)
DK (1) DK202984D0 (da)
IT (1) IT1172318B (da)
SU (1) SU1205785A3 (da)
WO (1) WO1984000805A1 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK159488A (da) * 1988-03-23 1989-09-24 Danske Sukkerfab Fremgangsmaade til kontinuerlig toerring eller inddampning af et materiale og et apparat til udoevelse af fremgangsmaaden
CH681042A5 (da) * 1989-07-03 1992-12-31 Bucher Guyer Ag Masch
JP2918641B2 (ja) * 1990-07-09 1999-07-12 有限会社松兵衛 食品の成形方法及び装置
CH680818A5 (da) * 1991-03-25 1992-11-13 Bucher Guyer Ag Masch
CA2655337A1 (en) * 2006-06-12 2007-12-21 Thomas Henry Egg product and production method
DE102010050440A1 (de) * 2010-11-04 2012-05-10 Merk Process Trocknungsverfahren und Trocknungsvorrichtung
CN102226640B (zh) * 2011-06-07 2012-12-26 上海东富龙科技股份有限公司 一种真空冷冻干燥机溢流自动加料装置及方法
CN103822461A (zh) * 2014-03-17 2014-05-28 无锡市海昌机械设备有限公司 真空带式液体连续干燥机用布料系统的改进结构
US10272360B2 (en) 2017-08-05 2019-04-30 Priya Naturals, Inc. Phytochemical extraction system and methods to extract phytochemicals from plants including plants of the family Cannabaceae sensu stricto
US20240102733A1 (en) * 2021-02-08 2024-03-28 Iq Energy Inc. System and method for drying sludge

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE67437C (de) * Dr. B. FINKELSTEIN in Firma M. B. VOGEL in Leipzig-Lindenau, Angerstrafse 11 Vacuumtrockenvorrichtung mit Druckausgleichung
US888257A (en) * 1906-02-16 1908-05-19 Emil Passburg Apparatus for drying in vacuum.
US1418638A (en) * 1918-01-30 1922-06-06 William G Lyle Apparatus for preserving food
US2121370A (en) * 1931-01-06 1938-06-21 Wurton Machine Company Apparatus for treating tobacco
US2528476A (en) * 1942-03-20 1950-10-31 Thomas Lipton Inc Method and apparatus for dehydration
GB560899A (en) * 1942-07-03 1944-04-26 Miles Wilson Carter A continuous vacuum dehydrating process
US3022752A (en) * 1960-07-23 1962-02-27 Voisine Ange Emile Baking oven
DE1604803A1 (de) * 1962-03-01 1971-01-07 Carlo Barbareschi Verfahren zur kontinuierlichen Absorbierung und Beseitigung von Wasserdampf oder anderen Loesungsmitteln durch Verdampfung oder Sublimation bei niedriger Temperatur unter Vakuum
GB989148A (en) * 1962-11-06 1965-04-14 Paolo Bocciardo Improvements in a method of and apparatus for drying tanned skins under vacuum in a continuous operation
US3260866A (en) * 1962-11-06 1966-07-12 Maytag Co Program control feature
US3206866A (en) * 1963-02-07 1965-09-21 Magma Power Co Method and apparatus for dehydrating foods employing geothermal steam
DE1198294B (de) * 1963-04-06 1965-08-05 Leybold Hochvakuum Anlagen Kontinuierlich arbeitende Gefriertrocknungs-kammer fuer Gueter in als ihre spaetere Verpackung dienenden Schalen
US3448527A (en) * 1965-09-20 1969-06-10 Luis A Hernandez Jr Quick freeze-drying system and apparatus therefor
US3324565A (en) * 1966-07-21 1967-06-13 Hupp Corp Apparatus and method for freeze drying
ES472798A1 (es) * 1977-09-02 1979-03-16 Patpan Inc Perfeccionamientos en los aparatos para el secado bajo vaciode materiales porosos en piezas delgadas
DE3006126A1 (de) * 1980-02-19 1981-09-03 Heinz 6116 Eppertshausen Lindner Etagentrockner
US4409744A (en) * 1981-06-08 1983-10-18 Proctor & Schwartz, Inc. Propeller fan drive

Also Published As

Publication number Publication date
CH660228A5 (de) 1987-03-31
JPS59501419A (ja) 1984-08-09
ATE18796T1 (de) 1986-04-15
DK202984A (da) 1984-04-18
DE3362690D1 (en) 1986-04-30
SU1205785A3 (ru) 1986-01-15
IT1172318B (it) 1987-06-18
IT8348845A0 (it) 1983-08-12
IT8348845A1 (it) 1985-02-12
CA1226131A (en) 1987-09-01
EP0116565A1 (de) 1984-08-29
WO1984000805A1 (fr) 1984-03-01
US4574495A (en) 1986-03-11
DK202984D0 (da) 1984-04-18

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