EP0660059B1 - Apparatus for drying bulk material - Google Patents
Apparatus for drying bulk material Download PDFInfo
- Publication number
- EP0660059B1 EP0660059B1 EP94118377A EP94118377A EP0660059B1 EP 0660059 B1 EP0660059 B1 EP 0660059B1 EP 94118377 A EP94118377 A EP 94118377A EP 94118377 A EP94118377 A EP 94118377A EP 0660059 B1 EP0660059 B1 EP 0660059B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- air
- pipe
- loose material
- drying
- 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
- 238000001035 drying Methods 0.000 title claims abstract description 22
- 239000013590 bulk material Substances 0.000 title description 11
- 238000007605 air drying Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000011236 particulate material Substances 0.000 abstract 8
- 238000010276 construction Methods 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 8
- 238000009833 condensation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 229920000426 Microplastic Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001228 spectrum Methods 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
- 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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
-
- 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
- F26B9/10—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof
- F26B9/103—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof using fixed or removable drying air channels placed in the stack, e.g. horizontally or vertically
Definitions
- the invention relates to a device for drying Bulk goods according to the preamble of claim 1.
- Such a device is known from DE-GM 89 10 763.
- the known device introduces the dried air through laterally flanged pipe to the bulk container is over an electric heater heats and flows in the lower area of the bulk container into the bulk material to be dried.
- the Bulk material is heated with this device directly in the area of the container outlet.
- the warm, dry Air flows upwards, heats the bulk goods and extracts them Moisture in the upper area of the container due to a Exhaust air outlet is suctioned off.
- From DE 36 37 700 is also a device for drying known from bulk goods. There is the dry, warmed air fed to the center of the bulk goods container and flows at the lower end the container via an air distribution pipe.
- a disadvantage of this known device is the fact that the air supply pipe is surrounded by bulk material and that immediately bulk material adjacent to the air supply pipe is heated very strongly and may be thermally damaged.
- the entry temperature of the dry air in the Granules less than that measured with the temperature sensor Temperature, because on the way through the cold granulate or cold Return air down considerable radiation losses occur and so that the dry air cools down.
- the invention is therefore based on the object Avoid disadvantages and a device for drying To create bulk goods, in which an even drying of the bulk material is possible with low temperature losses and an even temperature distribution both vertically as well is given horizontally.
- the main advantage of the invention is that now the thermal energy of the dried air or dried gas is made available immediately there where it is needed, namely on the drying hopper to the temperature value as specified by the control. Undefined heat release can be effective with the invention be prevented.
- the invention can be used for drying Plastic granules are used, they can be used in the same way Post-condensation of PET can be used. It is here too particularly important, a uniform temperature profile of the Granules can be reached over a long residence time.
- a uniform temperature profile of the Granules can be reached over a long residence time.
- a funnel wall heater be equipped.
- this is thermally insulated Tube designed as a double-walled tube.
- To improve the Thermal insulation can be the space between the two pipes evacuated or filled with a heat insulating gas
- An alternative embodiment provides that the tube with a flexible, temperature-resistant hose inside Mistake. This also creates a double-walled tube. The heat transfer can be very much by a suitable hose material be greatly reduced.
- the pipe for supplying the dried air at the upper end to introduce the container concentrically into this container or in Insert the upper area of the container laterally and over a Transfer sheet to a central position.
- the heating device Heating the dry gas either inside the container extending pipe or directly at the entrance to the pipe Arrange containers. This can lead to heat loss be minimized.
- the drawing shows: a bulk container for drying bulk material in a sectional view.
- the drawing schematically shows a bulk container 10 with a filler neck 25 through which the bulk material 19 is fed is, a bulk material removal 23 and a device 12 for Blowing in the dry and warmed air.
- a bulk material removal 23 To generate An air drying device 11 is provided for dry air. This is supplied with moist air via an exhaust air line 14. The dehumidified air reaches the through a supply air line 13 Bulk goods container 10.
- a Air drying device 11 is generally known and described for example in DE-PS 31 31 471.
- the Drying air is in a closed air circuit and is powered by a blower which Air drying device is arranged, moves.
- the over the Line 13 to the container 10 supplied dry air passes through a heating station 15 and then at the top of the Container via a flange 16 in the interior of the Container.
- a single-wall pipe flexible hose inside e.g. made of silicone or PUR, equip.
- the inventive method is also used for the post-condensation of PET Facility able to increase efficiency and process reliability increase.
- the drying process runs during this post-condensation similar to the drying process shown here, whereby Temperatures of 200 ° C and residence times of over 20 hours must be observed. Again, it is particularly important a uniform temperature profile of the granules over the long To achieve dwell time.
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Trocknen von Schüttgut nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for drying Bulk goods according to the preamble of claim 1.
Eine solche Vorrichtung ist aus dem DE-GM 89 10 763 bekannt. Die bekannte Vorrichtung führt die getrocknete Luft über ein seitlich angeflanschtes Rohr dem Schüttgutbehälter zu, wird über eine elektrische Heizung erwärmt und strömt im unteren Bereich des Schüttgutbehälters in das zu trocknende Schüttgut. Die Erwärmung des Schüttguts erfolgt mit dieser Einrichtung unmittelbar im Bereich des Behälterauslaufs. Die warme, trockene Luft strömt nach oben, erwärmt das Schüttgut und entzieht diesem Feuchtigkeit, die im oberen Bereich des Behälters durch ein Abluftaustritt abgesaugt wird.Such a device is known from DE-GM 89 10 763. The known device introduces the dried air through laterally flanged pipe to the bulk container is over an electric heater heats and flows in the lower area of the bulk container into the bulk material to be dried. The Bulk material is heated with this device directly in the area of the container outlet. The warm, dry Air flows upwards, heats the bulk goods and extracts them Moisture in the upper area of the container due to a Exhaust air outlet is suctioned off.
Durch die seitlich am Schüttgutbehälter angeordnete Heizung und die dort in den Behälter eingeleitete erwärmte Luft existiert in diesem Bereich ein Temperaturunterschied, auf der einen Seite zur Abluft und auf der anderen Seite zum Schüttgut. Außerdem wird der Schüttgutdurchfluß in dem genannten Bereich durch die Anordnung von Heizung und Luftzufuhrrohr behindert.Due to the heater and the heated air introduced into the container there exists in this area a temperature difference on the one hand to the Exhaust air and on the other hand to the bulk material. In addition, the Bulk flow in the area mentioned by the arrangement obstructed by heating and air supply pipe.
Aus der DE 36 37 700 ist ebenfalls eine Vorrichtung zum Trocknen von Schüttgut bekannt. Dort wird die trockene, erwärmte Luft mittig dem Schüttgutbehälter zugeführt und strömt am unteren Ende des Behälters über ein Luftverteilerrohr aus. From DE 36 37 700 is also a device for drying known from bulk goods. There is the dry, warmed air fed to the center of the bulk goods container and flows at the lower end the container via an air distribution pipe.
Ein Nachteil dieser bekannten Einrichtung ist darin zu sehen, daß das Luftzufuhrrohr von Schüttgut umgeben ist und das unmittelbar dem Luftzufuhrrohr benachbarte Schüttgut sehr stark erwärmt und unter Umständen thermisch geschädigt wird.A disadvantage of this known device is the fact that the air supply pipe is surrounded by bulk material and that immediately bulk material adjacent to the air supply pipe is heated very strongly and may be thermally damaged.
Während bei dem erstgenannten Stand der Technik das seitlich am Behälter angeordnete Luftzufuhrrohr nachteilig für die Produktströmung ist, kann bei dem im Stand der Technik gemäß DE 36 37 700 bekannten, von oben mittig über die ganze zylindrische Höhe des Behälters geführten Luftrohr zwar ein gleichmäßiger Massenfluß aufgebaut werden, es besteht jedoch der Nachteil, daß die Temperaturführung für die Lufteintrittstemperatur im Granulat schwer zu regeln ist.While in the first state of the art the side Container arranged air supply pipe disadvantageous for that Product flow is in the state of the art according to DE 36 37 700 known, from top center over the entire cylindrical Height of the container guided air pipe is a uniform Mass flow are built up, but there is the disadvantage that the temperature control for the air inlet temperature in the granulate is difficult to regulate.
So ist z.B. im Rahmen einer Hochtemperaturtrocknung bei welcher die Heizung direkt am Behälter angeflanscht ist und der Temperaturfühler für die Heizungsregelung unmittelbar hinter der Heizung liegt, die Eintrittstemperatur der Trockenluft in das Granulat geringer als die mit dem Temperaturfühler gemessene Temperatur, da auf dem Weg durch das kalte Granulat bzw. kalte Rückluft nach unten erhebliche Abstrahlungsverluste auftreten und damit die Trockenluft abkühlt.For example, as part of a high temperature drying at which the heater is flanged directly to the container and the Temperature sensor for the heating control immediately behind the Heating is located, the entry temperature of the dry air in the Granules less than that measured with the temperature sensor Temperature, because on the way through the cold granulate or cold Return air down considerable radiation losses occur and so that the dry air cools down.
Ist der Temperaturfühler direkt im unteren Teil des Luftverteilers angeordnet bedeutet dies, daß die Lufttemperatur im oberen Teil des Luftzufuhrrohres deutlich höher ist und somit die Granulatkörner, die direkt mit dem Rohr in Kontakt sind, einer Übertemperaturbehandlung ausgesetzt wird.Is the temperature sensor directly in the lower part of the Air distributor arranged this means that the air temperature in the upper part of the air supply pipe is significantly higher and therefore the granules that are in direct contact with the pipe, is subjected to an overtemperature treatment.
Der Erfindung liegt daher die Aufgabe zugrunde, die genannten Nachteile zu vermeiden und eine Einrichtung zum Trocknen von Schüttgut zu schaffen, bei welcher eine gleichmäßige Trocknung des Schüttgutes bei geringen Temperaturverlusten möglich ist und eine gleichmäßige Temperaturverteilung sowohl vertikal, wie auch horizontal gegeben ist.The invention is therefore based on the object Avoid disadvantages and a device for drying To create bulk goods, in which an even drying of the bulk material is possible with low temperature losses and an even temperature distribution both vertically as well is given horizontally.
Diese Aufgabe wird ausgehend von dem Oberbegriff des Hauptanspruchs durch dessen kennzeichnenden Merkmale gelöst.This task is based on the generic term of Main claim solved by its characteristic features.
Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß nunmehr die Wärmeenergie der getrockneten Luft oder des getrockneten Gases unmittelbar dort zur Verfügung gestellt wird, wo sie gebraucht wird, nämlich an dem Trocknungstrichter und zwar auf den Temperaturwert wie er von der Regelung vorgegeben ist. Eine undefinierte Abgabe von Wärme kann mit der Erfindung wirksam unterbunden werden.The main advantage of the invention is that now the thermal energy of the dried air or dried gas is made available immediately there where it is needed, namely on the drying hopper to the temperature value as specified by the control. Undefined heat release can be effective with the invention be prevented.
Insbesondere bei einem automatischen Lastanpassungsverfahren, wie es aus dem DE-Patent 31 31 471 bekannt ist, zeigt die Erfindung eine weitere Erhöhung der Effizienz. Bei dem bekannten Verfahren wird die Menge des Luftdurchsatzes durch den Schüttguttrocknungsbehälter bei steigender Ablufttemperatur herabgesetzt, bei sinkender Ablufttemperatur erhöht. Die Ablufttemperatur wird dabei unmittelbar am Luftaustritt des Behälters oder in der Rückluftleitung gemessen. Durch die Wärmeisolation des Rohres, welches die getrocknete Luft dem Schüttgutbehälter zuführt, wird eine Verfälschung der Ablufttemperatur wirksam verhindert.In particular with an automatic load adjustment method, such as it is known from DE patent 31 31 471, shows the invention a further increase in efficiency. In the known method is the amount of air flow through the Bulk drying container with increasing exhaust air temperature reduced, increased with decreasing exhaust air temperature. The Exhaust air temperature is directly at the air outlet of the Container or in the return air line. Through the Thermal insulation of the pipe, which the dried air Bulk container feeds, will falsify the Exhaust air temperature effectively prevented.
Die Erfindung kann wie beschrieben zur Trocknung von Kunststoffgranulat dienen, sie kann in gleicher Weise zur Nachkondensation von PET benutzt werden. Auch hier ist es besonders wichtig, ein gleichmäßiges Temperaturprofil des Granulats über eine lange Verweilzeit zu erreichen. Der Trocknungstrichter der bei der Nachkondensation von PET auch Reaktor genannt wird, kann auch mit einer Trichterwandbeheizung ausgestattet sein.As described, the invention can be used for drying Plastic granules are used, they can be used in the same way Post-condensation of PET can be used. It is here too particularly important, a uniform temperature profile of the Granules can be reached over a long residence time. Of the Drying hopper for post-condensation of PET too Reactor called can also be used with a funnel wall heater be equipped.
Gemäß einer vorteilhaften Ausgestaltung ist das wärmeisolierte Rohr als doppelwandiges Rohr ausgebildet. Zur Verbesserung der Wärmeisolation kann der Zwischenraum zwischen den beiden Rohren evakuiert oder mit einem wärmeisolierendem Gas gefüllt seinAccording to an advantageous embodiment, this is thermally insulated Tube designed as a double-walled tube. To improve the Thermal insulation can be the space between the two pipes evacuated or filled with a heat insulating gas
Eine alternative Ausgestaltung sieht vor, das Rohr mit einem innen liegenden, flexiblen und temperaturbeständigen Schlauch zu versehen. Auch hierdurch bildet sich ein doppelwandiges Rohr aus. Der Wärmeübergang kann durch ein geeignetes Schlauchmaterial sehr stark reduziert werden.An alternative embodiment provides that the tube with a flexible, temperature-resistant hose inside Mistake. This also creates a double-walled tube. The heat transfer can be very much by a suitable hose material be greatly reduced.
Um eine optimale Produktströmung zu erzielen ist es zweckmäßig und gemäß einer weiteren Ausgestaltung der Erfindung vorgesehen, das Rohr zur Zuführung der getrockneten Luft am oberen Abschluß des Behälters konzentrisch in diesen Behälter einzuführen oder im oberen Bereich des Behälters seitlich einzuführen und über einen Bogen in eine mittige Lage zu überführen.It is advisable to achieve an optimal product flow and according to a further embodiment of the invention, the pipe for supplying the dried air at the upper end to introduce the container concentrically into this container or in Insert the upper area of the container laterally and over a Transfer sheet to a central position.
Diese Art der Luftführung in Verbindung mit dem isolierten Luftverteilerrohr gewinnt deswegen an Bedeutung weil speziell bei der Behandlung von Polyestergranulat bzw. Polyesterschnitzel eine absolut gleichmäßiges Verweilzeitspektrum unter hoher Temperatur hinsichtlich der Trockenluft sichergestellt werden muß.This type of air flow in conjunction with the insulated Air distributor pipe is gaining in importance because especially at the treatment of polyester granules or polyester chips absolutely uniform residence time spectrum at high temperature with regard to the dry air must be ensured.
Eine gleichmäßige Nachkondensation bzw. Trocknung von Polyestergranulat oder Polyesterschnitzel kann nur dann erfolgen, wenn bei einem kontinuierlichen Prozeß sichergestellt ist, daß jedes einzelne Korn zeitlich sowie temperaturmäßig die gleiche Verweilzeit aufweist.Even post-condensation or drying of Polyester granules or polyester chips can only be made if it is ensured in a continuous process that each individual grain the same in terms of time and temperature Has dwell time.
Um weitere Wärmeverluste zu vermeiden ist es gemäß einer weiteren Ausgestaltung der Erfindung vorgesehen, die Heizeinrichtung zum Aufheizen des Trockengases entweder im innerhalb des Behälters verlaufenden Rohr oder unmittelbar am Eingang des Rohres in den Behälter anzuordnen. Damit können die Wärmeleitungsverluste minimiert werden. To avoid further heat loss it is according to another one Embodiment of the invention provided for the heating device Heating the dry gas either inside the container extending pipe or directly at the entrance to the pipe Arrange containers. This can lead to heat loss be minimized.
Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred developments of the In addition to the claims go from the invention Description and the drawings, the individual Features individually or in groups in the form of Sub-combinations in the embodiment of the invention and on other areas to be realized and beneficial as well as for Protectable versions can present themselves for the here Protection is claimed.
Sofern bei der Erfindung bzw. bei Ausgestaltung der Erfindungen von trockener Luft oder Trockenluft die Rede ist, ist sowohl natürlich Luft als auch jede Art von Gas und jede Art von Gaszusammensetzung zu verstehen. Die Erfindung beschränkt sich nicht auf die Anwendung einer bestimmten Gaszusammensetzung.If so in the invention or in the design of the inventions of dry air or dry air is both of course air as well as any type of gas and any type of Understand gas composition. The invention is limited not on the application of a certain gas composition.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen
dargestellt und werden im folgenden näher erläutert. Die
Zeichnung zeigt:
ein Schüttgutbehälter zum Trocknen von Schüttgut in einer
Schnittdarstellung.Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawing shows:
a bulk container for drying bulk material in a sectional view.
Die Zeichnung zeigt schematisch einen Schüttgutbehälter 10 mit
einem Einfüllstutzen 25 über welchen das Schüttgut 19 zugeführt
wird, einer Schüttgutentnahme 23 und einer Einrichtung 12 zum
Einblasen der trockenen und erwärmten Luft. Zur Erzeugung von
Trockenluft ist eine Lufttrocknungseinrichtung 11 vorgesehen.
Dieser wird feuchte Luft über eine Abluftleitung 14 zugeführt.
Die entfeuchtete Luft gelangt über eine Zuluftleitung 13 an den
Schüttgutbehälter 10.The drawing schematically shows a
In der Zeichnung ist nur ein Schüttgutbehälter dargestellt, es
ist jedoch selbstverständlich möglich, weitere Schüttgutbehälter
mit der Lufttrocknungseinrichtung 11 zu versorgen. Eine
Lufttrocknungseinrichtung 11 ist allgemein bekannt und
beispielsweise in der DE-PS 31 31 471 beschrieben. Die
Trocknungsluft befindet sich in einem geschlossenen Luftkreislauf
und wird durch ein Gebläse, welches in der
Lufttrocknungseinrichtung angeordnet ist, bewegt. Die über die
Leitung 13 dem Behälter 10 zugeführte trockene Luft gelangt durch
eine Aufheizstation 15 und anschließend am oberen Bereich des
Behälters über einen Flanschanschluß 16 in den Innenraum des
Behälters. Das im Innern des Behälters 10 angeordnete Rohr 17 für
die Führung der erwärmten trockenen Luft in den unteren Bereich
des Behälters ist doppelwandig ausgestaltet. Selbstverständlich
besteht auch die Möglichkeit, ein einwandiges Rohr mit einem
innen liegenden flexiblen Schlauch, z.B. aus Silikon oder PUR,
auszustatten. Durch die Anwendung eines flexiblen Schlauches in
einem Rohr wird ebenfalls eine sehr gute Wärmeisolation erzielt.
Bei der Anwendung eines doppelwandigen Rohrs, wie es in der Figur
dargestellt ist, kann der Zwischenraum zwischen den beiden Rohren
evakuiert sein oder mit einem Gas gefüllt sein.In the drawing, only one bulk container is shown, it
However, additional bulk containers are of course possible
to be supplied with the air drying device 11. A
Air drying device 11 is generally known and
described for example in DE-PS 31 31 471. The
Drying air is in a closed air circuit
and is powered by a blower which
Air drying device is arranged, moves. The over the
Im unteren Bereich des Behälters 10 strömt das erwärmte und
getrocknete Gas über einen Luftverteiler 18 in das zu trocknende
Schüttgut, nimmt die Feuchtigkeit auf und führt diese über die
Leitung 14 der Lufttrocknungseinrichtung 11 zu.The heated and flows in the lower region of the
Auch bei der Nachkondensation von PET ist die erfindungsgemäße Einrichtung in der Lage, die Effizienz und Prozeßsicherheit zu erhöhen. Bei dieser Nachkondensation läuft der Trocknungsprozeß ähnlich dem hier dargestellten Trocknungsprozeß ab, wobei Temperaturen Größe 200 °C und Verweilzeiten von über 20 Stunden eingehalten werden müssen. Auch hier ist es besonders wichtig, eine gleichmäßiges Temperaturprofil des Granulats über die lange Verweilzeit zu erreichen. Der Trocknungstrichter, welcher auch Reaktor genannt ist, besitzt zusätzlich um Temperaturgradienten zu verhindern eine Trichterwandbeheizung, zum Beispiel in Art eines Doppelmantels mit einem Ölkreislauf.The inventive method is also used for the post-condensation of PET Facility able to increase efficiency and process reliability increase. The drying process runs during this post-condensation similar to the drying process shown here, whereby Temperatures of 200 ° C and residence times of over 20 hours must be observed. Again, it is particularly important a uniform temperature profile of the granules over the long To achieve dwell time. The drying hopper, which too Reactor is also has temperature gradients to prevent funnel wall heating, for example in Art a double jacket with an oil circuit.
Claims (5)
- Apparatus for drying loose material (19), including at least one loose material container (10), which is connected to an air drying means (11) and a heating means (15) in a closed air circuit, and wherein the dry, heated air or dry, heated gas is moved through the loose material by means of a fan in order to extract moisture from the loose material, then the spent air from the loose material container is dried again and heated by means of the heating means and then supplied again to the loose material container, wherein a connection (16) for supplying the dry air or gas is provided in the upper region of the loose material container, and this connection terminates in a pipe (17), which is disposed substantially centrally in the container, the lower end of said pipe being provided with an air distributor (18), characterised in that the pipe (17) is provided with a heat insulating means, at least internally of the loose material container (10).
- Apparatus for drying loose material according to claim 1, characterised in that the pipe (17) is configured as a double pipe.
- Apparatus for drying loose material according to claim 1, characterised in that the pipe (17) is provided with an internally situated, flexible and temperature-resistant hose.
- Apparatus for drying loose material according to one of the preceding claims, characterised in that the pipe (17) is disposed concentrically at the upper end of the container (10) or extends concentrically through the container.
- Apparatus for drying loose material according to one of the preceding claims, characterised in that the heating means (15) for heating the dry air is disposed internally of the pipe (17), which extends in the container (10), or immediately at the inlet where the pipe (17) enters the container (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4344593 | 1993-12-24 | ||
| DE4344593A DE4344593C1 (en) | 1993-12-24 | 1993-12-24 | Apparatus for drying bulk material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0660059A1 EP0660059A1 (en) | 1995-06-28 |
| EP0660059B1 true EP0660059B1 (en) | 1999-06-09 |
Family
ID=6506307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94118377A Expired - Lifetime EP0660059B1 (en) | 1993-12-24 | 1994-11-23 | Apparatus for drying bulk material |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5509216A (en) |
| EP (1) | EP0660059B1 (en) |
| JP (1) | JP2695388B2 (en) |
| AT (1) | ATE181150T1 (en) |
| DE (2) | DE4344593C1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT412467B (en) * | 2001-05-31 | 2005-03-25 | Luger Ges M B H | DEVICE FOR SUCTION OR PRESSURE DELIVERY OF DUST OR GRANULATE MATERIAL |
| DE10352106B4 (en) * | 2003-11-04 | 2016-12-15 | Roderich W. Gräff | Method for controlling the gas throughput of bulk materials |
| ITPD20040258A1 (en) * | 2004-10-18 | 2005-01-18 | Moretto P A Srl | HOPPER FOR DEHUMIDIFICATION OF BULK SPECIAL MATERIAL |
| DE202013100731U1 (en) * | 2013-02-19 | 2014-05-20 | Digicolor Gmbh | Device for drying plastic granules |
| CN103486840A (en) * | 2013-09-27 | 2014-01-01 | 深圳市福田区青少年科技教育协会 | Quick dryer |
| CN112229165B (en) * | 2020-11-04 | 2023-11-07 | 中国科学院理化技术研究所 | Horizontal heat pump drying system and working method thereof |
Family Cites Families (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB145224A (en) * | 1919-05-17 | 1920-07-02 | Charley Tinker | An improved device for drying hay, straw and the like products |
| US1829477A (en) * | 1925-12-30 | 1931-10-27 | Douthitt Frank Howard | Process of and apparatus for drying liquids |
| US3920624A (en) * | 1974-01-14 | 1975-11-18 | Du Pont | Process for stripping residual solvent from polymer pellets and apparatus |
| US3913242A (en) * | 1974-09-11 | 1975-10-21 | Gear Co M W | Preheater for grain dryer |
| US4038758A (en) * | 1975-09-30 | 1977-08-02 | Miller Russell A | Grain dryer |
| DE2632054C3 (en) * | 1976-07-16 | 1982-05-27 | Hoechst Ag, 6000 Frankfurt | Process for drying chlorinated polyethylene |
| GB1590532A (en) * | 1976-08-04 | 1981-06-03 | Exxon Research Engineering Co | Elastomer extrusion drying with gas injection |
| DE2715790A1 (en) * | 1977-04-07 | 1978-10-12 | Polysius Ag | FLOATING GAS PREHEATER FOR FINE GOODS |
| US4199872A (en) * | 1977-09-08 | 1980-04-29 | Foster Wheeler Energy Corporation | Regeneration apparatus for producing sulfur dioxide |
| DE2800952A1 (en) * | 1978-01-11 | 1979-07-12 | Hoechst Ag | PROCESS AND SYSTEM FOR DRYING CHLORINATED POLYMERS |
| US4241021A (en) * | 1979-05-14 | 1980-12-23 | Stauffer Chemical Company | Fluidized bed reactor system |
| DE3162494D1 (en) * | 1980-06-06 | 1984-04-12 | Waagner Biro Ag | Process for regulating the through-flow of a cooling bunker |
| DE3131471A1 (en) * | 1981-03-20 | 1982-09-30 | Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff | DEVICE FOR DRYING HUMIDIFIER EXHAUST FROM ONE OR SEVERAL DUMP DRYING CONTAINERS |
| DE3234431A1 (en) * | 1982-09-17 | 1984-03-22 | Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff | METHOD AND DEVICE FOR REMOVING GASES AND STEAMS FROM DRYING FUNNELS FILLED WITH BULK MATERIAL |
| JPS59174130A (en) * | 1983-03-25 | 1984-10-02 | 株式会社日立製作所 | Electric cleaner |
| FR2551453B1 (en) * | 1983-08-31 | 1985-10-11 | Fives Cail Babcock | COAL GASIFIER IN HIGH-PRESSURE FLUIDIZED BED |
| FR2569471A1 (en) * | 1984-08-24 | 1986-02-28 | Surier Albert | Cereal dryer |
| JPS6172126A (en) * | 1984-09-17 | 1986-04-14 | Asahi Chem Ind Co Ltd | Method of building protection wall body |
| US4706390A (en) * | 1986-04-14 | 1987-11-17 | John A. Kitchen Ltd. | Dehydrator |
| DE3637700A1 (en) * | 1986-11-05 | 1988-05-19 | Motan Gmbh | METHOD FOR REGENERATING A DRYING CARTRIDGE LOADED WITH MOISTURE AND DEVICE FOR CARRYING OUT SUCH A METHOD |
| FR2626284B1 (en) * | 1988-01-26 | 1990-06-08 | Total France | APPARATUS FOR CATALYTIC CRACKING IN A FLUIDIZED BED OF A HYDROCARBON LOAD |
| DE8803539U1 (en) * | 1988-03-16 | 1988-05-11 | Amboss + Langbein Kg, 5657 Haan, De | |
| DE3901597A1 (en) * | 1988-03-16 | 1989-09-28 | Amboss & Langbein Kg | Container for plastics raw material |
| JPH0612211B2 (en) * | 1988-10-27 | 1994-02-16 | 株式会社松井製作所 | Dryer for synthetic resin materials |
| DE3929898A1 (en) * | 1989-09-08 | 1991-03-21 | Graeff Roderich Wilhelm | METHOD AND DEVICE FOR CONVEYING DRIED PLASTIC GRANULES |
| DE8910763U1 (en) * | 1989-09-09 | 1991-01-17 | Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg, De | |
| DE8910764U1 (en) * | 1989-09-09 | 1989-11-16 | Strack-Norma Gmbh, 5600 Wuppertal, De | |
| DE4006935A1 (en) * | 1990-03-06 | 1991-09-12 | Wacker Chemie Gmbh | Fluidised bed appts. for mixing, drying and coating bulk solids - has support tube concentrically placed around down pipe to form ring shaped aperture in mixing chamber |
| DE4029525A1 (en) * | 1990-09-18 | 1992-03-19 | Umwelt & Energietech | METHOD AND DEVICE FOR DRYING SOLID MATERIALS IN AN INDIRECTLY HEATED FLUIDIZED BED |
| US5372791A (en) * | 1992-04-20 | 1994-12-13 | Foster Wheeler Energy Corporation | Fluidized bed system and a fluidization and cooling nozzle for use therein |
-
1993
- 1993-12-24 DE DE4344593A patent/DE4344593C1/en not_active Expired - Fee Related
-
1994
- 1994-11-23 EP EP94118377A patent/EP0660059B1/en not_active Expired - Lifetime
- 1994-11-23 AT AT94118377T patent/ATE181150T1/en not_active IP Right Cessation
- 1994-11-23 DE DE59408392T patent/DE59408392D1/en not_active Expired - Fee Related
- 1994-12-20 US US08/359,819 patent/US5509216A/en not_active Expired - Fee Related
- 1994-12-26 JP JP6323239A patent/JP2695388B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59408392D1 (en) | 1999-07-15 |
| JPH07198256A (en) | 1995-08-01 |
| ATE181150T1 (en) | 1999-06-15 |
| EP0660059A1 (en) | 1995-06-28 |
| DE4344593C1 (en) | 1995-02-16 |
| US5509216A (en) | 1996-04-23 |
| JP2695388B2 (en) | 1997-12-24 |
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