EP0465951A1 - Contact belt dryer - Google Patents

Contact belt dryer Download PDF

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Publication number
EP0465951A1
EP0465951A1 EP91110723A EP91110723A EP0465951A1 EP 0465951 A1 EP0465951 A1 EP 0465951A1 EP 91110723 A EP91110723 A EP 91110723A EP 91110723 A EP91110723 A EP 91110723A EP 0465951 A1 EP0465951 A1 EP 0465951A1
Authority
EP
European Patent Office
Prior art keywords
gas
heating plate
conveyor belt
upper heating
belt dryer
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.)
Granted
Application number
EP91110723A
Other languages
German (de)
French (fr)
Other versions
EP0465951B1 (en
Inventor
Werner Dr. Liedy
Werner Rindfleisch
Wolfgang Keil
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.)
BASF SE
Original Assignee
BASF SE
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Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP0465951A1 publication Critical patent/EP0465951A1/en
Application granted granted Critical
Publication of EP0465951B1 publication Critical patent/EP0465951B1/en
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
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • 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
    • F26B17/04—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 all horizontal or slightly inclined
    • 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

Definitions

  • the invention relates to a contact belt dryer, consisting of an endless conveyor belt for transporting a product to be dried, a lower heating plate arranged below the conveyor belt, an upper heating plate arranged above the conveyor belt, a gas distribution device for hot gas, arranged between the conveyor belt and the upper heating plate, and one Gas extraction device.
  • Contact belt dryers are used, for example, for drying dyes and pigments with frequent product changes.
  • the task was therefore to significantly increase the evaporation performance of the contact belt dryer without impairing the ease of cleaning.
  • This object is achieved in that the upper heating plate is alternately blown with hot gas from one side on the entire underside and overflowed.
  • the contact belt dryer consists of an endless, driven conveyor belt 1, which is deflected via two rollers 2.
  • a lower heating plate 3 is arranged below the conveyor belt and an upper heating plate 4 is arranged above the conveyor belt.
  • the product 5 to be dried migrates through the contact belt dryer during the drying process.
  • Hot gas 7 flows into the contact belt dryer via the gas distribution device 6.
  • the gas distribution device consists of a pipe 6a for the gas inlet and two parallel gas outlet pipes 6b arranged between the conveyor belt and the upper heating plate - connected to the pipe for the gas inlet - which correspond to the length of the upper heating plate and which are equipped with lances or nozzles 6c. These lances or nozzles are staggered in bundles on both gas outlet pipes and are arranged below approx.
  • This gas / vapor mixture is sucked out of the contact belt dryer via the gas suction device 8.
  • the speed of the outflowing gas should be 1-2 m / sec, based on the free cross-section.
  • the distance between the conveyor belt and the upper heating plate should be between 50 and 400 mm.

Abstract

Contact belt dryer, consisting of an endless conveyor belt for the transport of a product to be dried, a lower heating plate arranged below the conveyor belt, an upper heating plate arranged above the conveyor belt, a gas distribution device for hot gas, arranged between conveyor belt and upper heating plate, and a gas extraction device, the upper heating plate being alternately blown and overflowed, in each case from one side, with hot gas on the entire underside. <IMAGE>

Description

Die Erfindung betrifft einen Kontaktbandtrockner, bestehend aus einem endlosen Förderband für den Transport eines zu trocknenden Produktes, einer unterhalb des Förderbandes angeordneten unteren Heizplatte, einer oberhalb des Förderbandes angeordneten oberen Heizplatte, einer Gasverteilungseinrichtung für heißes Gas, angeordnet zwischen Förderband und oberer Heizplatte, und einer Gasabsaugeinrichtung.The invention relates to a contact belt dryer, consisting of an endless conveyor belt for transporting a product to be dried, a lower heating plate arranged below the conveyor belt, an upper heating plate arranged above the conveyor belt, a gas distribution device for hot gas, arranged between the conveyor belt and the upper heating plate, and one Gas extraction device.

Kontaktbandtrockner werden beispielsweise für die Trocknung von Farbstoffen und Pigmenten bei häufigem Produktwechsel eingesetzt.Contact belt dryers are used, for example, for drying dyes and pigments with frequent product changes.

Es ist bekannt, bei solchen Kontaktbandtrocknern - die bei häufigem Produktwechsel leicht gereinigt werden können - die Gasführung, im wesentlichen notwendig zur Brüdenausschleusung - Brüden aus dem zu trocknenden Produkt - über das auf dem Förderband liegende und durch den Kontaktbandtrockner hindurchlaufende zu trocknende Produkt strömen zu lassen. Die dabei erzielbaren Verdampfungsleistungen sind jedoch so gering, daß ein wirtschaftlicher Betrieb - im Vergleich zu anderen Trocknertypen, beispielsweise einem Trockenschrank - nicht möglich ist.It is known in such contact belt dryers - which can be easily cleaned with frequent product changes - to let the gas flow, essentially necessary for the evacuation of vapors - vapors from the product to be dried - flow over the product lying on the conveyor belt and passing through the contact belt dryer to be dried . However, the evaporation capacities that can be achieved are so low that economical operation - in comparison to other dryer types, for example a drying cabinet - is not possible.

Es stellte sich daher die Aufgabe, die Verdampfungsleistung des Kontaktbandtrockners deutlich zu erhöhen, ohne die Reinigungsfreundlichkeit zu beeinträchtigen.The task was therefore to significantly increase the evaporation performance of the contact belt dryer without impairing the ease of cleaning.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die obere Heizplatte abwechselnd jeweils von einer Seite auf der gesamten Unterseite mit heißem Gas angeblasen und überströmt wird.This object is achieved in that the upper heating plate is alternately blown with hot gas from one side on the entire underside and overflowed.

Weitere Merkmale des erfindungsgemäßen Kontaktbandtrockners sind Gegenstand der Unteransprüche.Further features of the contact belt dryer according to the invention are the subject of the dependent claims.

Ein Ausführungsbeispiel der Erfindung mit den wesentlichen erfindungsgemäßen Merkmalen ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.

  • Figur 1 zeigt einen Längsschnitt durch den Kontaktbandtrockner,
  • Figur 2 zeigt einen Schnitt A-A durch den Kontaktbandtrockner.
An embodiment of the invention with the essential features of the invention is shown in the drawing and will be described in more detail below.
  • FIG. 1 shows a longitudinal section through the contact belt dryer,
  • Figure 2 shows a section AA through the contact belt dryer.

Der Kontaktbandtrockner besteht aus einem endlosen, angetriebenen Förderband 1, das über zwei Rollen 2 umgelenkt wird. Unterhalb des Förderbandes ist eine untere Heizplatte 3 und oberhalb des Förderbandes eine obere Heizplatte 4 angeordnet. Das zu trocknende Produkt 5 wandert während des Trocknungsvorganges durch den Kontaktbandtrockner hindurch. Über die Gasverteilungseinrichtung 6 strömt heißes Gas 7 in den Kontaktbandtrockner. Die Gasverteilungseinrichtung besteht aus einem Rohr 6a für den Gaseintritt und zwei zwischen Förderband und oberer Heizplatte angeordneten parallel verlaufenden Gasaustrittsrohren 6b - verbunden mit dem Rohr für den Gaseintritt - , die der Länge der oberen Heizplatte entsprechen und die mit Lanzen oder Düsen 6c ausgerüstet sind. Diese Lanzen oder Düsen sind an beiden Gasaustrittsrohren bündelweise versetzt und unter ca. 45 C nach oben in Richtung obere Heizplatte angeordnet. Durch diese Anordnung ist gewährleistet, daß die obere Heizplatte auf ihrer gesamten Unterseite mit Gas angeblasen und überströmt wird. Das Gas dient einerseits zur Ausschleusung der Brüden - die bei der Trocknung des Produktes aus demselben ausströmen - und andererseits zur Wärmeübertragung von der oberen Heizplatte zum Produkt.The contact belt dryer consists of an endless, driven conveyor belt 1, which is deflected via two rollers 2. A lower heating plate 3 is arranged below the conveyor belt and an upper heating plate 4 is arranged above the conveyor belt. The product 5 to be dried migrates through the contact belt dryer during the drying process. Hot gas 7 flows into the contact belt dryer via the gas distribution device 6. The gas distribution device consists of a pipe 6a for the gas inlet and two parallel gas outlet pipes 6b arranged between the conveyor belt and the upper heating plate - connected to the pipe for the gas inlet - which correspond to the length of the upper heating plate and which are equipped with lances or nozzles 6c. These lances or nozzles are staggered in bundles on both gas outlet pipes and are arranged below approx. 45 C in the direction of the upper heating plate. This arrangement ensures that the upper heating plate is blown with gas and overflowed on its entire underside. The gas serves on the one hand to discharge the vapors - which flow out of the product when it dries - and on the other hand to transfer heat from the upper heating plate to the product.

Es versteht sich von selbst, daß die Anordnung und Art der Lanzen bzw. Düsen verschiedenartig ausgeführt werden kann.It goes without saying that the arrangement and type of the lances or nozzles can be designed in different ways.

Dieses Gas-/Brüdengemisch wird über die Gasabsaugeinrichtung 8 aus dem Kontaktbandtrockner abgesaugt. Hierbei sollte die Geschwindigkeit des abströmenden Gases 1-2 m/sek, bezogen auf den freien Querschnitt, betragen. Der Abstand zwischen Förderband und oberer Heizplatte sollte zwischen 50 und 400 mm liegen.This gas / vapor mixture is sucked out of the contact belt dryer via the gas suction device 8. The speed of the outflowing gas should be 1-2 m / sec, based on the free cross-section. The distance between the conveyor belt and the upper heating plate should be between 50 and 400 mm.

Überraschenderweise konnte mittels dieser speziellen Gasverteilungseinrichtung die Verdampfungsleistung des Kontaktbandtrockners bei der Trocknung von Feststoffen und Pigmenten um ca. 100 % verbessert werden. Die resultierende Verdampfungsleistung ist so groß, daß der Kontaktbandtrockner wirtschaftlich betrieben werden kann. Gleichzeitig bleibt der Vorzug dieses Apparatetyps erhalten, nämlich die sehr gute und schnelle Reinigbarkeit bei Produktwechsel.Surprisingly, by means of this special gas distribution device, the evaporation performance of the contact belt dryer when drying solids and pigments could be improved by approximately 100%. The resulting evaporation capacity is so great that the contact belt dryer can be operated economically. At the same time, the advantage of this type of device remains, namely the very good and quick cleanability when changing products.

Claims (3)

1. Kontaktbandtrockner, bestehend aus einem endlosen Förderband für den Transport eines zu trocknenden Produktes, einer unterhalb des Förderbandes angeordneten unteren Heizplatte, einer oberhalb des Förderbandes angeordneten oberen Heizplatte, einer Gasverteilungseinrichtung für heißes Gas, angeordnet zwischen Förderband und oberer Heizplatte, und einer Gasabsaugeinrichtung, dadurch gekennzeichnet, daß die obere Heizplatte abwechselnd jeweils von einer Seite auf der gesamten Unterseite mit heißem Gas angeblasen und überströmt wird.1.contact belt dryer, consisting of an endless conveyor belt for the transport of a product to be dried, a lower heating plate arranged below the conveyor belt, an upper heating plate arranged above the conveyor belt, a gas distribution device for hot gas, arranged between the conveyor belt and the upper heating plate, and a gas suction device, characterized in that the upper heating plate is alternately blown with hot gas and overflowed from one side on the entire underside. 2. Kontaktbandtrockner nach Anspruch 1, dadurch gekennzeichnet, daß die Gasverteilungseinrichtung aus einem Zulaufrohr für das Gas und zwei mit dem Zulaufrohr verbundenen parallel verlaufenden Gasausströmrohren besteht.2. Contact belt dryer according to claim 1, characterized in that the gas distribution device consists of an inlet pipe for the gas and two gas outlet pipes connected in parallel and connected to the inlet pipe. 3. Kontaktbandtrockner nach Ansprüchen 1 und 2, dadurch gekennzeichnet, daß in den Gasausströmrohren jeweils bündelweise, versetzte, unter 45 C nach oben geneigte Lanzen oder Düsen eingebracht sind.3. Contact belt dryer according to claims 1 and 2, characterized in that in each case in the gas discharge pipes in bundles, offset, lances or nozzles inclined upwards are introduced below 45 ° C.
EP91110723A 1990-07-07 1991-06-28 Contact belt dryer Expired - Lifetime EP0465951B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021710A DE4021710A1 (en) 1990-07-07 1990-07-07 CONTACT TAPE DRYER
DE4021710 1990-07-07

Publications (2)

Publication Number Publication Date
EP0465951A1 true EP0465951A1 (en) 1992-01-15
EP0465951B1 EP0465951B1 (en) 1993-05-26

Family

ID=6409877

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Application Number Title Priority Date Filing Date
EP91110723A Expired - Lifetime EP0465951B1 (en) 1990-07-07 1991-06-28 Contact belt dryer

Country Status (5)

Country Link
EP (1) EP0465951B1 (en)
AT (1) ATE89915T1 (en)
DE (2) DE4021710A1 (en)
DK (1) DK0465951T3 (en)
ES (1) ES2044656T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651218A1 (en) * 1993-10-28 1995-05-03 Bayer Ag Device for continuous filtering and drying a suspension of solids
EP2330370A2 (en) * 2009-12-07 2011-06-08 e&e Verfahrenstechnik GmbH Belt drying with efficient heating
CN114667427A (en) * 2020-10-23 2022-06-24 株式会社Lg化学 Super absorbent polymer drying device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE453654A (en) *
US1560589A (en) * 1922-05-25 1925-11-10 Bernard R Andrews Method of drying material
CH354027A (en) * 1959-06-12 1961-04-30 Charmes Andre Dryer
FR1361318A (en) * 1962-11-13 1964-05-22 Hupp Corp Radiant energy heat treatment process and installation
FR1384072A (en) * 1963-11-15 1965-01-04 Improvements to carpet dryers for pasty products

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE453654A (en) *
US1560589A (en) * 1922-05-25 1925-11-10 Bernard R Andrews Method of drying material
CH354027A (en) * 1959-06-12 1961-04-30 Charmes Andre Dryer
FR1361318A (en) * 1962-11-13 1964-05-22 Hupp Corp Radiant energy heat treatment process and installation
FR1384072A (en) * 1963-11-15 1965-01-04 Improvements to carpet dryers for pasty products

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651218A1 (en) * 1993-10-28 1995-05-03 Bayer Ag Device for continuous filtering and drying a suspension of solids
US5527458A (en) * 1993-10-28 1996-06-18 Bayer Aktiengesellschaft Device for continuous filtration and drying of a solid suspension
EP2330370A2 (en) * 2009-12-07 2011-06-08 e&e Verfahrenstechnik GmbH Belt drying with efficient heating
EP2330370A3 (en) * 2009-12-07 2011-08-24 e&e Verfahrenstechnik GmbH Belt drying with efficient heating
CN114667427A (en) * 2020-10-23 2022-06-24 株式会社Lg化学 Super absorbent polymer drying device
CN114667427B (en) * 2020-10-23 2023-06-20 株式会社Lg化学 Superabsorbent polymer drying apparatus

Also Published As

Publication number Publication date
DE59100130D1 (en) 1993-07-01
ATE89915T1 (en) 1993-06-15
DE4021710A1 (en) 1992-01-09
EP0465951B1 (en) 1993-05-26
DK0465951T3 (en) 1993-07-12
ES2044656T3 (en) 1994-01-01

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