EP2257751B1 - Dryer for material to be dried - Google Patents

Dryer for material to be dried Download PDF

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Publication number
EP2257751B1
EP2257751B1 EP09723198A EP09723198A EP2257751B1 EP 2257751 B1 EP2257751 B1 EP 2257751B1 EP 09723198 A EP09723198 A EP 09723198A EP 09723198 A EP09723198 A EP 09723198A EP 2257751 B1 EP2257751 B1 EP 2257751B1
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EP
European Patent Office
Prior art keywords
drying
dryer
opening
cooling
air duct
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EP09723198A
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German (de)
French (fr)
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EP2257751A1 (en
Inventor
Franz Anibas
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Binder and Co AG
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Binder and Co AG
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Priority to PL09723198T priority Critical patent/PL2257751T3/en
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    • 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
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
    • F26B3/0923—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by mechanical means, e.g. vibrated plate, stirrer
    • 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
    • F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/10—Floors, roofs, or bottoms; False bottoms

Definitions

  • the invention relates to a dryer for Trocknungsgut with a feed point for the Trock Vietnamesesgut, a drying area, and a delivery point for the Trock Vietnamesesgut, wherein a supply air duct for the supply of a drying gas, preferably drying air, is provided to the drying area, and at least one exhaust port for the discharge of the drying gas after passing through the drying area, wherein the supply air duct is at least partially surrounded by an outer wall having at least one supply opening for the supply of a cooling medium and at least one discharge opening for the cooling medium is provided, and between the at least one supply opening and the at least one discharge opening a flow path for the cooling medium between the outer wall and the supply air duct is formed, according to the preamble of claim 1.
  • a supply air duct for the supply of a drying gas preferably drying air
  • the supply air duct is at least partially surrounded by an outer wall having at least one supply opening for the supply of a cooling medium and at least one discharge opening for the cooling medium is provided, and between the at least one supply
  • Dryers of this type are used, for example, in the minerals industry, where drying material is dried by hot drying air at temperatures of several hundred degrees.
  • the dryers can be designed differently, such as drum, belt, stationary fluidized bed, vibratory fluid bed or disc dryer.
  • a vibration-excited fluidized bed dryer for example, the material to be dried is transported by vibration via a distributor plate accommodated in a housing. The housing is thereby vibrated via spring assemblies and a corresponding vibration drive. The dryer is supplied via a supply air drying air drying, which was heated by means of a hot gas generator.
  • the supply air duct is usually located in the lower areas of the dryer, and the exhaust port in the upper areas of the Trockners, so that the drying air flows through on their way from the supply air duct to the exhaust ports, the distributor plate and the conveyed thereon Trocknungsgut, while drying the drying material.
  • the supply air duct is designed as a screwed inner trough made of heat-resistant steel sheets.
  • This has the disadvantage that at the prevailing interior temperatures of the inner trough experiences a particularly high thermal expansion, and thereby strongly discards the progress of service life, and even break at individual points. Due to the high temperatures, inner trough fastening screws can also be loosened or, after a certain period of operation, can no longer be dismantled non-destructively.
  • the introduced inner insulation is slowly destroyed by vibratory stress in vibration-induced dryer types, loses insulating effect with increasing operating time and must be renewed. After all, these types of dryers can not be cleaned with water on the inside, as the insulating layer would become completely saturated with water, which would have a very negative impact on the vibration behavior and the insulation effect.
  • the DE 26 08 228 A1 discloses a furnace for baking ceramic plates.
  • the oven has a tunnel receiving the objects to be baked, and a lower box fed with hot gases thereunder.
  • the pressurized hot gases are forced through a porous floor from the lower box into the tunnel, whereby the objects to be baked are lifted off the ground and levitated.
  • An outer wall is provided which surrounds both the tunnel and the lower box.
  • the lower box is thus surrounded by the outer wall, wherein between the inner wall and outer wall, a cooling fluid, eg air circulates.
  • the cooling air flow enters the floor laterally, is guided by horizontally extending channels within the floor, and then passes through the top of the floor and rises in the direction of the tunneling material to be backed up the tunnel.
  • the (cooling air) area between the outer and inner wall is connected to the lower box 3 by a tubular circulation channel.
  • the AT 384 349 B discloses a drying plant in which the drying chamber or its baffles are equipped with cooling elements through which circulates cooling fluid.
  • Claim 1 relates to a dryer for Trocknungsgut with a feeding point for the Trocknungsgut, a drying area, and a delivery point for the Trocknungsgut, wherein a supply air duct for the supply of a drying gas, preferably drying air, is provided to the drying area, and at least one exhaust port for the discharge the drying gas after passing through the drying region, wherein the supply air duct is at least partially spaced from an outer wall having at least one supply port for the supply of a cooling medium and at least one discharge opening for the cooling medium is provided, and between the at least one supply port and the at least a discharge opening a flow path for the cooling medium between the outer wall and the supply air duct is formed.
  • a supply air duct for the supply of a drying gas preferably drying air
  • the at least one discharge opening is designed as a passage opening in the supply air channel, which connects the area bounded by the outer wall with the interior of the supply air duct, wherein the at least one passage opening in the upper regions of the supply air duct is arranged and designed to to allow a flow of the cooling medium along the inside of the supply air duct down.
  • the cooling air thus flows after entering the supply air duct along the inner walls of the supply air duct downwards, thereby forming a "cold air curtain" between the hot drying air and the inner wall of the supply air duct, which causes a particularly effective cooling of the supply air duct.
  • the supply air duct is thus effectively flowed around by a cooling medium, and causes in this way the cooling of the supply air duct, instead of using the use of an insulating material to prevent heat transfer to housing parts.
  • the cooling of the supply air duct also prevents excessive thermal expansion, so that Material stresses can be kept behind.
  • the dryer can also be made shorter, since due to the improved cooling an increase in the drying air temperature is possible.
  • guide plates for the cooling gas can be arranged in the region of the passage openings.
  • the cooling medium may be a cooling gas, and at least one discharge opening as a passage opening in the supply air duct, which connects the limited area of the outer wall with the interior of the supply air duct, be executed.
  • the cooling gas is preferably cooling air.
  • the drying material is already comparatively hot, so that the low temperatures of the cooling air sufficient to dissipate residual moisture in the drying material.
  • the cooling medium thus fulfills not only its cooling function but also the function of a post-drying.
  • the invention is particularly advantageous when the dryer is a fluid bed dryer, in particular a vibratory fluidized bed dryer.
  • the at least one supply opening is arranged below the supply air duct.
  • the Fig. 1 shows an embodiment of a dryer according to the invention with reference to a vibration-excited fluidized bed dryer with a housing 1, which is about spring assemblies 2 and a corresponding vibration drive 3 is vibrated.
  • the dryer has a feed point 9 for the material to be dried T, as well as a delivery point 10 for the material to be dried T, wherein the drying material T passes through a drying region between the feed point 9 and the delivery point 10.
  • drying air is supplied to the dryer via the supply air opening 6 of a supply air duct 4, which air is supplied by means of a hot gas generator 5 (see FIG Fig. 4 ) was heated.
  • a supply air duct 4 is usually located in the lower areas of the dryer, and is bounded above by a distributor plate 7, such as a perforated plate bottom, on which the drying material T is transported.
  • the supply air duct 4 is often referred to as "trough inside” due to its trough-like design, and is firmly connected to the housing 1 (see also Fig. 3 ).
  • the exhaust gas openings 8 for the removal of the drying gas are usually in the upper regions of the dryer, so that the drying air flows through the inflow tray 7 and the drying material T conveyed thereon on their way from the supply air duct 4 to the exhaust ports 8, thereby drying the drying material T.
  • the supply air duct 4 is at least partially surrounded by an outer wall 11 spaced apart (see also Fig. 2 ), which has at least one supply opening 12 for the supply of a cooling medium K, and at least one discharge opening 13 for the cooling medium K is provided, wherein between the at least one supply opening 12 and the at least one discharge opening 13, a flow path 14 for the cooling medium K between the outer wall 11 and the supply air duct 4 is formed.
  • the at least one discharge opening 13 is formed by passage openings in the supply air duct 4 between the area bounded by the outer wall 11 and the supply air duct 4.
  • the cooling medium K is about cooling air, which will generally have room temperature.
  • the at least one discharge opening 13 is designed as a passage opening in the supply air duct 4, which connects the area delimited by the outer wall 11 to the interior of the supply air duct 4, wherein the at least one passage opening 13 is arranged in the upper regions of the supply air duct 4 and is designed to allow a flow of the cooling medium K along the inside of the supply air duct 4 down.
  • the flow of the cooling air K runs along the inside of the supply air channel 4 downwards, whereby guide plates can also be provided for this purpose, which support the formation of a favorable flow path.
  • guide plates can also be provided for this purpose, which support the formation of a favorable flow path.
  • a cold air curtain is formed, which effectively protects the inside of the supply air duct 4 against excessive heat load.
  • a strong heating of the supply air duct 4 can be prevented, and thus a strong thermal expansion of the steel sheets of the supply air 4.
  • the cooling air K mixes with the drying air within the supply air duct 4, but causes only a slight reduction in their temperature.
  • the cooling air K finally escapes together with the drying air through the distributor plate 7.
  • throttles 15 may be provided in the vicinity of the supply port, which are formed approximately through openings in along the longitudinal direction of the dryer extending spacer strips.
  • the throttles 15 favor a uniform flow of the cooling air K along the flow path 14 to the discharge openings 13.
  • Throttles 16 may also be provided in the discharge openings 13.
  • FIG. 4 an embodiment of a possible drying plant for drying material T is shown with a dryer according to the invention, located in the Fig. 4 located in the middle of the picture.
  • the dryer is supplied via the feed point 9 a drying material T, such as calcium carbonate, which leaves the dryer again via the delivery point 10.
  • the dryer is further supplied with drying air that has been heated by means of a hot gas generator 5.
  • the hot gas generator 5 has for this purpose a burner 17 which is supplied with fuel B, preferably gas or oil.
  • the fuel supply is controlled via a control unit 18.
  • the hot gas generator 5 furthermore has an ignition gas unit 31.
  • combustion air V is supplied to the hot gas generator 5.
  • a muffler 20 may be provided here.
  • the Fig. 5 further shows a compared to Fig. 1 Alternative embodiment in which the discharge opening 13 is directed to the discharge point 10 facing the region of the drying area.
  • the drying material is already comparatively hot, so that the low temperatures of the cooling air sufficient to dissipate residual moisture in the drying material.
  • the cooling medium thus fulfills not only its cooling function but also the function of a post-drying.
  • the drying air is supplied to the lower regions of the dryer the supply air duct 4, and discharged via exhaust ports 8, which are located in the upper region of the dryer. On its way from the supply air duct 4 to the exhaust gas openings 8, it flows through the inflow base 7 and the drying material T conveyed thereon.
  • the drying air is subsequently fed to a filter and / or separator 21, which deposits components of the drying material T entrained with the drying air. These portions can be removed via an outlet 22.
  • the filtered drying air leaves the separator 21 via the line 23, passes through a second fan 24, and is discharged via a muffler 25 as exhaust air.
  • fresh air F may be added to the drying air to control the temperature of the drying air.
  • a flow regulator 26 may be provided, which is controlled by a temperature sensor 27.
  • Another sensor 28 monitors the drying air after passing through the dryer and regulates the control unit 18 for the fuel via a flow regulator 29.
  • the flow regulator 29 is further controlled by a further sensor 30, which monitors the temperature of the drying air before entering the dryer.
  • a further blower 32 is provided, which draws in fresh air as the cooling medium K, and via the supply opening 12 (in FIG Fig. 4 not visible) the supply air duct 4 feeds.
  • the cooling air K in this case has approximately room temperature.
  • a dryer is thus realized which ensures effective cooling of the supply air channel 4 without the use of an insulating material.
  • excessive thermal expansions of the supply air duct 4 can be avoided, and thus the material stress can be reduced.
  • the maintenance can be reduced because the replacement of the insulating material, or the supply air duct 4 can be avoided.
  • an improved cooling of the supply air duct 4 and a lower heating of the supporting housing parts an increase in the carrying capacity can furthermore be achieved.
  • cleaning with water is possible, which additionally facilitates the operation of the dryer according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft einen Trockner für Trocknungsgut mit einer Aufgabestelle für das Trocknungsgut, einem Trocknungsbereich, sowie einer Abgabestelle für das Trocknungsgut, wobei ein Zuluftkanal für die Zufuhr eines Trocknungsgases, vorzugsweise Trocknungsluft, zum Trocknungsbereich vorgesehen ist, sowie zumindest eine Abgasöffnung für die Abfuhr des Trocknungsgases nach Durchtreten des Trocknungsbereiches, wobei der Zuluftkanal zumindest abschnittsweise von einer äußeren Wand beabstandet umgeben ist, die zumindest eine Zufuhröffnung für die Zufuhr eines Kühlmediums aufweist, sowie zumindest eine Abfuhröffnung für das Kühlmedium vorgesehen ist, und zwischen der zumindest einen Zufuhröffnung und der zumindest einen Abfuhröffnung eine Strömungsstrecke für das Kühlmedium zwischen äußerer Wand und dem Zuluftkanal gebildet wird, gemäß dem Oberbegriff von Anspruch 1.The invention relates to a dryer for Trocknungsgut with a feed point for the Trocknungsgut, a drying area, and a delivery point for the Trocknungsgut, wherein a supply air duct for the supply of a drying gas, preferably drying air, is provided to the drying area, and at least one exhaust port for the discharge of the drying gas after passing through the drying area, wherein the supply air duct is at least partially surrounded by an outer wall having at least one supply opening for the supply of a cooling medium and at least one discharge opening for the cooling medium is provided, and between the at least one supply opening and the at least one discharge opening a flow path for the cooling medium between the outer wall and the supply air duct is formed, according to the preamble of claim 1.

Stand der TechnikState of the art

Trockner dieser Art werden etwa in der Mineralien-Industrie eingesetzt, wo Trocknungsgut durch heiße Trocknungsluft mit Temperaturen von mehreren Hundert Grad getrocknet wird. Die Trockner können dabei unterschiedlich ausgeführt sein, etwa als Trommel-, Band-, stationäre Fließbett-, schwingungserregte Fließbett- oder Scheibentrockner. Bei einem schwingungserregten Fließbetttrockner etwa wird das Trocknungsgut durch Vibration über einen in einem Gehäuse untergebrachten Anströmboden transportiert. Das Gehäuse wird hierbei über Federpakete und einen entsprechenden Schwingungsantrieb in Schwingung versetzt. Dem Trockner wird über einen Zuluftkanal Trocknungsluft zugeführt, die mithilfe eines Heißgaserzeugers erhitzt wurde. Der Zuluftkanal befindet sich dabei in der Regel in den unteren Bereichen des Trockners, und die Abgasöffnung in den oberen Bereichen des Trockners, sodass die Trocknungsluft auf ihrem Weg vom Zuluftkanal zu den Abgasöffnungen den Anströmboden und das darauf geförderte Trocknungsgut durchströmt, und dabei das Trocknungsgut trocknet.Dryers of this type are used, for example, in the minerals industry, where drying material is dried by hot drying air at temperatures of several hundred degrees. The dryers can be designed differently, such as drum, belt, stationary fluidized bed, vibratory fluid bed or disc dryer. In a vibration-excited fluidized bed dryer, for example, the material to be dried is transported by vibration via a distributor plate accommodated in a housing. The housing is thereby vibrated via spring assemblies and a corresponding vibration drive. The dryer is supplied via a supply air drying air drying, which was heated by means of a hot gas generator. The supply air duct is usually located in the lower areas of the dryer, and the exhaust port in the upper areas of the Trockners, so that the drying air flows through on their way from the supply air duct to the exhaust ports, the distributor plate and the conveyed thereon Trocknungsgut, while drying the drying material.

Da sich aufgrund der Zufuhr der heißen Trocknungsluft der innerhalb des Gehäuses angeordnete Zuluftkanal stark erhitzt, sind die zu schützenden, tragenden Bauteile des Gehäuses mit einer Innenisolierung, zumeist aus Stein- oder Mineralwolle, umgeben. Der Zuluftkanal ist dabei als geschraubter Innentrog aus hitzebeständigen Stahlblechen ausgeführt. Das hat jedoch den Nachteil, dass bei den vorherrschenden Innenraumtemperaturen der Innentrog eine besonders hohe Wärmeausdehnung erfährt, und sich dabei mit fortschreitender Betriebsdauer stark verwirft, und an einzelnen Stellen sogar brechen kann. Durch die hohen Temperaturen können sich außerdem Innentrog-Befestigungsschrauben lösen, oder sind nach einer gewissen Betriebsdauer nicht mehr zerstörungsfrei demontierbar. Des Weiteren wird die eingebrachte Innenisolierung bei schwingungserregten Trocknertypen durch die Schwingbeanspruchung langsam zerstört, verliert mit zunehmender Betriebsdauer Isolierwirkung und muss erneuert werden. Schließlich können diese Trocknertypen innen nicht mit Wasser gereinigt werden, da sich die Isolierschicht mit Wasser voll saugen würde, und dies einen äußerst negativen Einfluss auf das Schwingverhalten und die Isolierwirkung hätte.Since due to the supply of hot drying air disposed within the housing supply air duct heated, the protective components of the housing to be protected with an inner insulation, mostly of stone or mineral wool, surrounded. The supply air duct is designed as a screwed inner trough made of heat-resistant steel sheets. However, this has the disadvantage that at the prevailing interior temperatures of the inner trough experiences a particularly high thermal expansion, and thereby strongly discards the progress of service life, and even break at individual points. Due to the high temperatures, inner trough fastening screws can also be loosened or, after a certain period of operation, can no longer be dismantled non-destructively. Furthermore, the introduced inner insulation is slowly destroyed by vibratory stress in vibration-induced dryer types, loses insulating effect with increasing operating time and must be renewed. After all, these types of dryers can not be cleaned with water on the inside, as the insulating layer would become completely saturated with water, which would have a very negative impact on the vibration behavior and the insulation effect.

Die DE 26 08 228 A1 offenbart einen Ofen zum Backen von keramischen Platten. Der Ofen weist einen die zu backenden Gegenstände aufnehmenden Tunnel sowie einen darunter angeordneten, mit heißen Gasen gespeisten unteren Kasten auf. Die unter Druck stehenden heißen Gase werden durch einen porösen Boden aus dem unteren Kasten in den Tunnel getrieben, wodurch die zu backenden Gegenstände vom Boden abgehoben und in Schwebe gebracht werden. Es ist eine äußere Wand vorgesehen, welche sowohl den Tunnel als auch den unteren Kasten umgibt. Der untere Kasten wird also von der äußeren Wand umgeben, wobei zwischen innerer Wand und äußerer Wand ein Kühlfluid, z.B. Luft zirkuliert.The DE 26 08 228 A1 discloses a furnace for baking ceramic plates. The oven has a tunnel receiving the objects to be baked, and a lower box fed with hot gases thereunder. The pressurized hot gases are forced through a porous floor from the lower box into the tunnel, whereby the objects to be baked are lifted off the ground and levitated. An outer wall is provided which surrounds both the tunnel and the lower box. The lower box is thus surrounded by the outer wall, wherein between the inner wall and outer wall, a cooling fluid, eg air circulates.

Der Kühlluftstrom tritt seitlich in den Boden ein, wird durch horizontal verlaufende Kanäle innerhalb des Boden geführt und tritt dann durch die Oberseite des Bodens hindurch und steigt in Richtung des das zu backende material bergenden Tunnels hinauf.The cooling air flow enters the floor laterally, is guided by horizontally extending channels within the floor, and then passes through the top of the floor and rises in the direction of the tunneling material to be backed up the tunnel.

Bei der Anlage gemäß der DE 26 08 228 A1 handelt es sich um ein System mit einem geschlossenen Kreislauf. Die mittels einem Gebläse in das System eingebrachte, mit dem Heißgas gemischte Kühlluft wird über einen im Deckenbereich des Tunnels angeordneten Umwälzkanal angesaugt und wieder in den unteren Kasten befördert. Hierzu die Vorsehung einer Umwälzeinrichtung, z.B. einer Saugstrahlpumpe oder eines Injektors erforderlich.In the system according to the DE 26 08 228 A1 it is a system with a closed circuit. The introduced by means of a blower in the system, mixed with the hot gas cooling air is sucked in via a arranged in the ceiling region of the tunnel circulation channel and transported back into the lower box. For this purpose, the provision of a circulating device, such as a suction jet pump or an injector required.

Der (Kühlluft-)Bereich zwischen äußerer und innerer Wand ist durch einen rohrförmigen Umwälzkanal mit dem unteren Kasten 3 verbunden.The (cooling air) area between the outer and inner wall is connected to the lower box 3 by a tubular circulation channel.

Die AT 384 349 B offenbart eine Trockungsanlage, bei welcher die Trocknungskammer bzw. deren Leitbleche mit Kühlelementen bestückt sind, durch welche Kühlflüssigkeit zirkuliert.The AT 384 349 B discloses a drying plant in which the drying chamber or its baffles are equipped with cooling elements through which circulates cooling fluid.

Es ist das Ziel der Erfindung die Nachteile bekannter Trocknungsanlagen zu vermeiden und einen Trockner zu verwirklichen, der ohne Verwendung eines Isoliermaterials eine hinreichende Kühlung des Zuluftkanals für die Trocknungsluft sicherstellt. Dabei sollen übermäßige Wärmeausdehnungen des Zuluftkanals vermieden, und somit die Materialbeanspruchung reduziert werden. Des Weiteren soll der Wartungsaufwand verringert werden, indem der Austausch des Isoliermaterials vermieden werden kann. Durch eine verbesserte Kühlung des Zuluftkanals und einer geringeren Erwärmung der tragenden Gehäuseteile soll des Weiteren eine Erhöhung der Tragfähigkeit erreicht werden. Schließlich soll die Reinigung mit Wasser ermöglicht werden, was den Betrieb eines erfindungsgemäßen Trockners erleichtern soll.It is the object of the invention to avoid the disadvantages of known drying systems and to realize a dryer which ensures adequate cooling of the supply air duct for the drying air without the use of an insulating material. Excessive thermal expansions of the supply air duct are to be avoided, thus reducing the material stress. Furthermore, the maintenance is to be reduced by the replacement of the insulating material can be avoided. By an improved cooling of the supply air duct and a lower heating of the supporting housing parts, an increase in the load capacity is furthermore to be achieved. Finally, the cleaning should be made possible with water, which should facilitate the operation of a dryer according to the invention.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Diese Ziele werden durch die Merkmale von Anspruch 1 erreicht. Anspruch 1 bezieht sich auf einen Trockner für Trocknungsgut mit einer Aufgabestelle für das Trocknungsgut, einem Trocknungsbereich, sowie einer Abgabestelle für das Trocknungsgut, wobei ein Zuluftkanal für die Zufuhr eines Trocknungsgases, vorzugsweise Trocknungsluft, zum Trocknungsbereich vorgesehen ist, sowie zumindest eine Abgasöffnung für die Abfuhr des Trocknungsgases nach Durchtreten des Trocknungsbereiches, wobei der Zuluftkanal zumindest abschnittsweise von einer äußeren Wand beabstandet umgeben ist, die zumindest eine Zufuhröffnung für die Zufuhr eines Kühlmediums aufweist, sowie zumindest eine Abfuhröffnung für das Kühlmedium vorgesehen ist, und zwischen der zumindest einen Zufuhröffnung und der zumindest einen Abfuhröffnung eine Strömungsstrecke für das Kühlmedium zwischen äußerer Wand und dem Zuluftkanal gebildet wird. Erfindungsgemäß ist hierbei vorgesehen, dass die zumindest eine Abfuhröffnung als Durchtrittsöffnung im Zuluftkanal, die den von der äußeren Wand begrenzten Bereich mit dem Inneren des Zuluftkanals verbindet, ausgeführt ist, wobei die zumindest eine Durchtrittsöffnung in den oberen Bereichen des Zuluftkanals angeordnet und ausgeführt ist, um eine Strömung des Kühlmediums entlang der Innenseite des Zuluftkanals nach unten zu ermöglichen.These objects are achieved by the features of claim 1. Claim 1 relates to a dryer for Trocknungsgut with a feeding point for the Trocknungsgut, a drying area, and a delivery point for the Trocknungsgut, wherein a supply air duct for the supply of a drying gas, preferably drying air, is provided to the drying area, and at least one exhaust port for the discharge the drying gas after passing through the drying region, wherein the supply air duct is at least partially spaced from an outer wall having at least one supply port for the supply of a cooling medium and at least one discharge opening for the cooling medium is provided, and between the at least one supply port and the at least a discharge opening a flow path for the cooling medium between the outer wall and the supply air duct is formed. According to the invention, it is provided that the at least one discharge opening is designed as a passage opening in the supply air channel, which connects the area bounded by the outer wall with the interior of the supply air duct, wherein the at least one passage opening in the upper regions of the supply air duct is arranged and designed to to allow a flow of the cooling medium along the inside of the supply air duct down.

Die Kühlluft strömt somit nach Eintritt in den Zuluftkanal entlang der Innenwände des Zuluftkanals abwärts, und bildet dabei einen "Kaltluftvorhang" zwischen der heißen Trocknungsluft und der Innenwand des Zuluftkanals, was eine besonders effektive Kühlung des Zuluftkanals bewirkt.The cooling air thus flows after entering the supply air duct along the inner walls of the supply air duct downwards, thereby forming a "cold air curtain" between the hot drying air and the inner wall of the supply air duct, which causes a particularly effective cooling of the supply air duct.

Der Zuluftkanal wird also auf effektive Weise von einem Kühlmedium umströmt, und bewirkt auf diese Weise die Kühlung des Zuluftkanals, anstatt über die Verwendung eines Isoliermaterials eine Wärmeübertragung auf Gehäuseteile zu verhindern. Durch die Kühlung des Zuluftkanals werden außerdem übermäßige Wärmeausdehnungen verhindert, sodass Materialbeanspruchungen hintan gehalten werden können. Außerdem kann der Trockner auch kürzer ausgeführt werden, da aufgrund der verbesserten Kühlung eine Steigerung der Trocknungslufttemperatur möglich ist.The supply air duct is thus effectively flowed around by a cooling medium, and causes in this way the cooling of the supply air duct, instead of using the use of an insulating material to prevent heat transfer to housing parts. The cooling of the supply air duct also prevents excessive thermal expansion, so that Material stresses can be kept behind. In addition, the dryer can also be made shorter, since due to the improved cooling an increase in the drying air temperature is possible.

Um die Ausbildung eines Kaltluftvorhangs zu begünstigen, können im Bereich der Durchtrittsöffnungen Leitbleche für das Kühlgas angeordnet sein.In order to promote the formation of a cold air curtain, guide plates for the cooling gas can be arranged in the region of the passage openings.

Gemäß einer vorteilhaften Weiterbildung der Erfindung kann es sich bei dem Kühlmedium um ein Kühlgas handeln, und zumindest eine Abfuhröffnung als Durchtrittsöffnung im Zuluftkanal, die den von der äußeren Wand begrenzten Bereich mit dem Inneren des Zuluftkanals verbindet, ausgeführt sein. Das Kühlgas ist dabei vorzugsweise Kühlluft. Mithilfe der Durchtrittsöffnungen wird die Kühlluft in das Innere des Zuluftkanals geleitet, wo sie allerdings keine nennenswerte Temperaturreduktion der Trocknungsluft bewirkt.According to an advantageous embodiment of the invention, the cooling medium may be a cooling gas, and at least one discharge opening as a passage opening in the supply air duct, which connects the limited area of the outer wall with the interior of the supply air duct, be executed. The cooling gas is preferably cooling air. By means of the passage openings, the cooling air is conducted into the interior of the supply air duct, where, however, it does not cause a significant reduction in the temperature of the drying air.

Gemäß einer vorteilhaften Weiterbildung der Erfindung kann vorgesehen sein, dass zumindest eine Abfuhröffnung auf den der Abgabestelle zugewandten Bereich des Trocknungsbereiches gerichtet ist. In diesen Bereichen ist das Trocknungsgut bereits vergleichsweise heiß, sodass die niedrigen Temperaturen der Kühlluft ausreichen, um Restfeuchtigkeit im Trocknungsgut abzuführen. Das Kühlmedium erfüllt somit neben seiner kühlenden Funktion auch die Funktion einer Nachtrocknung.According to an advantageous development of the invention, provision may be made for at least one discharge opening to be directed towards the area of the drying area facing the delivery location. In these areas, the drying material is already comparatively hot, so that the low temperatures of the cooling air sufficient to dissipate residual moisture in the drying material. The cooling medium thus fulfills not only its cooling function but also the function of a post-drying.

Besonders vorteilhaft gestaltet sich die Erfindung dabei, wenn es sich bei dem Trockner um einen Fließbetttrockner handelt, insbesondere um einen schwingungserregten Fließbetttrockner.The invention is particularly advantageous when the dryer is a fluid bed dryer, in particular a vibratory fluidized bed dryer.

In einer speziellen Ausführungsvariante ist die mindestens eine Zuführöffnung unterhalb des Zuluftkanals angeordnet.In a special embodiment, the at least one supply opening is arranged below the supply air duct.

KURZE BESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

Die Erfindung wird im Folgenden anhand möglicher Ausführungsformen mithilfe der beiliegenden Zeichnungen näher erläutert. Es zeigen hierbei die

  • Fig. 1 eine schematische Seitenansicht einer Ausführungsform eines erfindungsgemäßen Trockners,
  • Fig. 2 die Ausführungsform eines erfindungsgemäßen Trockners gemäß Fig. 1 von der linken Seite der Fig. 1 gesehen,
  • Fig. 3 einen Detailausschnitt zur Illustrierung der Durchtrittsöffnungen im Zuluftkanal,
  • Fig. 4 ein Schema für eine mögliche Trocknungsanlage mit einem erfindungsgemäßen Trockner, und die
  • Fig. 5 eine im Vergleich zu Fig. 1 alternative Ausführungsform, bei der die Abfuhröffnung auf den der Abgabestelle zugewandten Bereich des Trocknungsbereiches gerichtet ist, und das Kühlmedium somit auch die Funktion einer Nachtrocknung erfüllt.
The invention is explained in more detail below with reference to possible embodiments with reference to the accompanying drawings. It show here the
  • Fig. 1 a schematic side view of an embodiment of a dryer according to the invention,
  • Fig. 2 the embodiment of a dryer according to the invention according to Fig. 1 from the left side of the Fig. 1 seen,
  • Fig. 3 a detail to illustrate the passage openings in the supply air duct,
  • Fig. 4 a diagram for a possible drying plant with a dryer according to the invention, and the
  • Fig. 5 one compared to Fig. 1 Alternative embodiment in which the discharge opening is directed to the discharge area facing the drying area, and thus the cooling medium also fulfills the function of a post-drying.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

Die Fig. 1 zeigt eine Ausführungsform eines erfindungsgemäßen Trockners anhand eines schwingungserregten Fließbetttrockners mit einem Gehäuse 1, das über Federpakete 2 und einen entsprechenden Schwingungsantrieb 3 in Schwingung versetzt wird. Der Trockner weist eine Aufgabestelle 9 für das Trocknungsgut T, sowie eine Abgabestelle 10 für das Trocknungsgut T auf, wobei das Trocknungsgut T zwischen der Aufgabestelle 9 und der Abgabestelle 10 einen Trocknungsbereich durchläuft.The Fig. 1 shows an embodiment of a dryer according to the invention with reference to a vibration-excited fluidized bed dryer with a housing 1, which is about spring assemblies 2 and a corresponding vibration drive 3 is vibrated. The dryer has a feed point 9 for the material to be dried T, as well as a delivery point 10 for the material to be dried T, wherein the drying material T passes through a drying region between the feed point 9 and the delivery point 10.

Dem Trockner wird des Weiteren über die Zuluftöffnung 6 eines Zuluftkanals 4 Trocknungsluft zugeführt, die mithilfe eines Heißgaserzeugers 5 (siehe Fig. 4) erhitzt wurde. Der Zuluftkanal 4 befindet sich dabei in der Regel in den unteren Bereichen des Trockners, und wird nach oben von einem Anströmboden 7, etwa ein Lochblechboden, begrenzt, auf dem das Trocknungsgut T transportiert wird. Der Zuluftkanal 4 wird aufgrund seiner trogartigen Ausführung auch oft als "Innentrog" bezeichnet, und ist mit dem Gehäuse 1 fest verbunden (siehe auch Fig. 3). Die Abgasöffnungen 8 für die Abfuhr des Trocknungsgases befinden sich in der Regel in den oberen Bereichen des Trockners, sodass die Trocknungsluft auf ihrem Weg vom Zuluftkanal 4 zu den Abgasöffnungen 8 den Anströmboden 7 und das darauf geförderte Trocknungsgut T durchströmt, und dabei das Trocknungsgut T trocknet.Furthermore, drying air is supplied to the dryer via the supply air opening 6 of a supply air duct 4, which air is supplied by means of a hot gas generator 5 (see FIG Fig. 4 ) was heated. Of the Supply air duct 4 is usually located in the lower areas of the dryer, and is bounded above by a distributor plate 7, such as a perforated plate bottom, on which the drying material T is transported. The supply air duct 4 is often referred to as "trough inside" due to its trough-like design, and is firmly connected to the housing 1 (see also Fig. 3 ). The exhaust gas openings 8 for the removal of the drying gas are usually in the upper regions of the dryer, so that the drying air flows through the inflow tray 7 and the drying material T conveyed thereon on their way from the supply air duct 4 to the exhaust ports 8, thereby drying the drying material T. ,

Der Zuluftkanal 4 ist zumindest abschnittsweise von einer äußeren Wand 11 beabstandet umgeben (siehe auch Fig. 2), die zumindest eine Zufuhröffnung 12 für die Zufuhr eines Kühlmediums K aufweist, sowie zumindest eine Abfuhröffnung 13 für das Kühlmedium K vorgesehen ist, wobei zwischen der zumindest einen Zufuhröffnung 12 und der zumindest einen Abfuhröffnung 13 eine Strömungsstrecke 14 für das Kühlmedium K zwischen äußerer Wand 11 und dem Zuluftkanal 4 gebildet wird. Die zumindest eine Abfuhröffnung 13 wird dabei durch Durchtrittsöffnungen im Zuluftkanal 4 zwischen dem von der äußeren Wand 11 begrenzten Bereich und dem Zuluftkanal 4 gebildet. Beim Kühlmedium K handelt es sich etwa um Kühlluft, die in der Regel Raumtemperatur aufweisen wird.The supply air duct 4 is at least partially surrounded by an outer wall 11 spaced apart (see also Fig. 2 ), which has at least one supply opening 12 for the supply of a cooling medium K, and at least one discharge opening 13 for the cooling medium K is provided, wherein between the at least one supply opening 12 and the at least one discharge opening 13, a flow path 14 for the cooling medium K between the outer wall 11 and the supply air duct 4 is formed. The at least one discharge opening 13 is formed by passage openings in the supply air duct 4 between the area bounded by the outer wall 11 and the supply air duct 4. The cooling medium K is about cooling air, which will generally have room temperature.

Erfindungsgemäß ist vorgesehen, dass die zumindest eine Abfuhröffnung 13 als Durchtrittsöffnung im Zuluftkanal 4, die den von der äußeren Wand 11 begrenzten Bereich mit dem Inneren des Zuluftkanals 4 verbindet, ausgeführt ist, wobei die zumindest eine Durchtrittsöffnung 13 in den oberen Bereichen des Zuluftkanals 4 angeordnet und ausgeführt ist, um eine Strömung des Kühlmediums K entlang der Innenseite des Zuluftkanals 4 nach unten zu ermöglichen.According to the invention, it is provided that the at least one discharge opening 13 is designed as a passage opening in the supply air duct 4, which connects the area delimited by the outer wall 11 to the interior of the supply air duct 4, wherein the at least one passage opening 13 is arranged in the upper regions of the supply air duct 4 and is designed to allow a flow of the cooling medium K along the inside of the supply air duct 4 down.

Wie in der Fig. 3 ersichtlich ist, wird verläuft die Strömung der Kühlluft K entlang der Innenseite des Zuluftkanals 4 nach unten, wobei hierfür auch Leitbleche vorgesehen sein können, die die Ausbildung eines günstigen Strömungsverlaufes unterstützen. Durch eine solche Ausführung der Abfuhröffnung 13 wird ein Kaltluftvorhang gebildet, der die Innenseite des Zuluftkanals 4 effektiv vor übermäßiger Wärmebelastung schützt.Like in the Fig. 3 it can be seen, the flow of the cooling air K runs along the inside of the supply air channel 4 downwards, whereby guide plates can also be provided for this purpose, which support the formation of a favorable flow path. Such a design of the discharge opening 13, a cold air curtain is formed, which effectively protects the inside of the supply air duct 4 against excessive heat load.

Eine starke Aufheizung des Zuluftkanals 4 kann so verhindert werden, und somit auch eine starke Wärmeausdehnung der Stahlbleche des Zuluftkanals 4. Die Kühlluft K vermischt sich in weiterer Folge mit der Trocknungsluft innerhalb des Zuluftkanals 4, bewirkt aber lediglich eine geringfügige Herabsetzung ihrer Temperatur. Die Kühlluft K entweicht schließlich gemeinsam mit der Trocknungsluft durch den Anströmboden 7.A strong heating of the supply air duct 4 can be prevented, and thus a strong thermal expansion of the steel sheets of the supply air 4. The cooling air K mixes with the drying air within the supply air duct 4, but causes only a slight reduction in their temperature. The cooling air K finally escapes together with the drying air through the distributor plate 7.

Wie in der Fig.3 zu sehen ist, können im Nahebereich zur Zufuhröffnung 12 Drosseln 15 vorgesehen sein, die etwa durch Öffnungen in entlang der Längsrichtung des Trockners verlaufenden Abstandsleisten gebildet werden. Die Drosseln 15 begünstigen eine gleichmäßige Strömung der Kühlluft K entlang der Strömungsstrecke 14 zu den Abführöffnungen 13. Auch in den Abfuhröffnungen 13 können Drosseln 16 vorgesehen sein.Like in the Figure 3 can be seen, 12 throttles 15 may be provided in the vicinity of the supply port, which are formed approximately through openings in along the longitudinal direction of the dryer extending spacer strips. The throttles 15 favor a uniform flow of the cooling air K along the flow path 14 to the discharge openings 13. Throttles 16 may also be provided in the discharge openings 13.

In der Fig. 4 ist schließlich eine Ausführungsform einer möglichen Trocknungsanlage für Trocknungsgut T mit einem erfindungsgemäßen Trockner gezeigt, der sich in der Fig. 4 in der Mitte des Bildes befindet. Dem Trockner wird über die Aufgabestelle 9 ein Trocknungsgut T zugeführt, etwa Kalziumcarbonat, das über die Abgabestelle 10 den Trockner wieder verlässt. Dem Trockner wird des Weiteren Trocknungsluft zugeführt, die mithilfe eines Heißgaserzeugers 5 erhitzt wurde. Der Heißgaserzeuger 5 weist hierzu einen Brenner 17 auf, der mit Brennstoff B, vorzugsweise Gas oder Öl, versorgt wird. Die Brennstoffzufuhr ist dabei über eine Regeleinheit 18 regelbar. Der Heißgaserzeuger 5 weist des Weiteren eine Zündgaseinheit 31 auf. Mithilfe eines ersten Gebläses 19 wird Verbrennungsluft V dem Heißgaserzeuger 5 zugeführt. Wahlweise kann hierbei ein Schalldämpfer 20 vorgesehen sein.In the Fig. 4 Finally, an embodiment of a possible drying plant for drying material T is shown with a dryer according to the invention, located in the Fig. 4 located in the middle of the picture. The dryer is supplied via the feed point 9 a drying material T, such as calcium carbonate, which leaves the dryer again via the delivery point 10. The dryer is further supplied with drying air that has been heated by means of a hot gas generator 5. The hot gas generator 5 has for this purpose a burner 17 which is supplied with fuel B, preferably gas or oil. The fuel supply is controlled via a control unit 18. The hot gas generator 5 furthermore has an ignition gas unit 31. By means of a first blower 19, combustion air V is supplied to the hot gas generator 5. Optionally, a muffler 20 may be provided here.

Die Fig. 5 zeigt des Weiteren eine im Vergleich zu Fig. 1 alternative Ausführungsform, bei der die Abfuhröffnung 13 auf den der Abgabestelle 10 zugewandten Bereich des Trocknungsbereiches gerichtet ist. In diesen Bereichen ist das Trocknungsgut bereits vergleichsweise heiß, sodass die niedrigen Temperaturen der Kühlluft ausreichen, um Restfeuchtigkeit im Trocknungsgut abzuführen. Das Kühlmedium erfüllt somit neben seiner kühlenden Funktion auch die Funktion einer Nachtrocknung.The Fig. 5 further shows a compared to Fig. 1 Alternative embodiment in which the discharge opening 13 is directed to the discharge point 10 facing the region of the drying area. In these areas, the drying material is already comparatively hot, so that the low temperatures of the cooling air sufficient to dissipate residual moisture in the drying material. The cooling medium thus fulfills not only its cooling function but also the function of a post-drying.

Die Trocknungsluft wird in die unteren Bereiche des Trockners dem Zuluftkanal 4 zugeführt, und über Abgasöffnungen 8, die sich im oberen Bereich des Trockners befinden, abgeführt. Auf ihrem Weg vom Zuluftkanal 4 zu den Abgasöffnungen 8 durchströmt sie dabei den Anströmboden 7 und das darauf geförderte Trocknungsgut T. Die Trocknungsluft wird in weiterer Folge einem Filter und/oder Abscheider 21 zugeführt, der mit der Trocknungsluft mitgeführte Anteile des Trocknungsgutes T abscheidet. Diese Anteile können über einen Auslass 22 entfernt werden. Die gefilterte Trocknungsluft verlässt den Abscheider 21 über die Leitung 23, passiert ein zweites Gebläse 24, und wird über einen Schalldämpfer 25 als Abluft abgegeben. Vor dem Eintritt in den Abscheider 21 kann der Trocknungsluft Frischluft F zugesetzt werden, um die Temperatur der Trocknungsluft zu kontrollieren. Hierzu kann ein Mengenregler 26 vorgesehen sein, der über einen Temperatursensor 27 geregelt wird. Ein weiterer Sensor 28 überwacht die Trocknungsluft nach Passieren des Trockners und regelt die Regeleinheit 18 für den Brennstoff über einen Mengenregler 29. Der Mengenregler 29 wird des Weiteren über einen weiteren Sensor 30, der die Temperatur der Trocknungsluft vor Eintritt in den Trockner überwacht, geregelt.The drying air is supplied to the lower regions of the dryer the supply air duct 4, and discharged via exhaust ports 8, which are located in the upper region of the dryer. On its way from the supply air duct 4 to the exhaust gas openings 8, it flows through the inflow base 7 and the drying material T conveyed thereon. The drying air is subsequently fed to a filter and / or separator 21, which deposits components of the drying material T entrained with the drying air. These portions can be removed via an outlet 22. The filtered drying air leaves the separator 21 via the line 23, passes through a second fan 24, and is discharged via a muffler 25 as exhaust air. Before entering the separator 21, fresh air F may be added to the drying air to control the temperature of the drying air. For this purpose, a flow regulator 26 may be provided, which is controlled by a temperature sensor 27. Another sensor 28 monitors the drying air after passing through the dryer and regulates the control unit 18 for the fuel via a flow regulator 29. The flow regulator 29 is further controlled by a further sensor 30, which monitors the temperature of the drying air before entering the dryer.

Für die erfindungsgemäß vorgesehene Kühlung des Zuluftkanals 4 ist ein weiteres Gebläse 32 vorgesehen, das Frischluft als Kühlmedium K ansaugt, und über die Zufuhröffnung 12 (in der Fig. 4 nicht ersichtlich) dem Zuluftkanal 4 zuführt. Die Kühlluft K weist hierbei etwa Raumtemperatur auf.For the cooling of the supply air duct 4 provided according to the invention, a further blower 32 is provided, which draws in fresh air as the cooling medium K, and via the supply opening 12 (in FIG Fig. 4 not visible) the supply air duct 4 feeds. The cooling air K in this case has approximately room temperature.

Mithilfe der Erfindung wird somit ein Trockner verwirklicht, der ohne Verwendung eines Isoliermaterials eine effektive Kühlung des Zuluftkanals 4 sicherstellt. Dabei können übermäßige Wärmeausdehnungen des Zuluftkanals 4 vermieden, und somit die Materialbeanspruchung reduziert werden. Des Weiteren kann der Wartungsaufwand verringert werden, da der Austausch des Isoliermaterials, oder des Zuluftkanals 4 vermieden werden kann. Durch eine verbesserte Kühlung des Zuluftkanals 4 und einer geringeren Erwärmung der tragenden Gehäuseteile kann des Weiteren eine Erhöhung der Tragfähigkeit erreicht werden. Schließlich ist eine Reinigung mit Wasser möglich, was den Betrieb des erfindungsgemäßen Trockners zusätzlich erleichtert.By means of the invention, a dryer is thus realized which ensures effective cooling of the supply air channel 4 without the use of an insulating material. In this case, excessive thermal expansions of the supply air duct 4 can be avoided, and thus the material stress can be reduced. Furthermore, the maintenance can be reduced because the replacement of the insulating material, or the supply air duct 4 can be avoided. By an improved cooling of the supply air duct 4 and a lower heating of the supporting housing parts, an increase in the carrying capacity can furthermore be achieved. Finally, cleaning with water is possible, which additionally facilitates the operation of the dryer according to the invention.

Claims (7)

  1. A dryer for material to be dried (T) comprising a feeding point (9) for the material to be dried, a drying region, as well as a delivery point (10) for the material to be dried (T), wherein an air supply channel (4) for supplying a drying gas, preferably drying air, to the drying region is provided, as well as at least one exhaust-gas opening (8) is provided for removing the drying gas after passing through the drying region, wherein the air supply channel (4) is surrounded at least in sections at a distance by an outer wall (11), which has at least one supply opening (12) for supplying a cooling medium (K) as well as at least one removal opening (13) for the cooling medium (K), wherein between the at least one supply opening (12) and the at least one removal opening (13) a flow section (14) for the cooling medium (K) is formed between the outer wall (11) and the air supply channel (4), characterized in that the at least one removal opening (13) is configured as a through-opening in the air supply channel (4), which connects the region bounded by the outer wall (11) to the interior of the air supply channel (4), wherein the at least one through-opening (13) is arranged in the upper regions of the air supply channel (4) and is configured in such a way as to make it possible for the cooling medium (K) to flow downwards along the inner side of the air supply channel (4).
  2. Dryer according to claim 1, characterized in that baffle plates for the cooling gas are arranged in the region of the through-opening (13).
  3. Dryer according to claim 1 or 2, characterized in that at least one removal opening (13) is directed towards the area of the drying region facing the delivery point (10).
  4. Dryer according to one of claims 1 to 3, characterized in that the dryer is a fluid bed dryer.
  5. Dryer according to claim 4, characterized in that the fluid bed dryer is a vibrating fluid bed dryer.
  6. Dryer according to one of claims 1 to 5, characterized in that the cooling medium (K) is a cooling gas.
  7. Dryer according to one of claims 1 to 6, characterized in that the at least one supply opening (12) dryer is arranged below the air supply channel (4).
EP09723198A 2008-03-19 2009-03-19 Dryer for material to be dried Active EP2257751B1 (en)

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AT0016908U AT10660U1 (en) 2008-03-19 2008-03-19 DRYER WITH COOLING MEDIUM
PCT/EP2009/053228 WO2009115564A1 (en) 2008-03-19 2009-03-19 Dryer for material to be dried

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EP2257751B1 true EP2257751B1 (en) 2012-10-31

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CN106196967A (en) * 2016-08-29 2016-12-07 成都欧林生物科技股份有限公司 A kind of dry sterilization system
CN106225451A (en) * 2016-08-29 2016-12-14 成都欧林生物科技股份有限公司 Based on the tunnel drier improving drying efficiency
CN106288711A (en) * 2016-08-29 2017-01-04 成都欧林生物科技股份有限公司 Tunnel drier based on drying effect
CN106288713A (en) * 2016-08-29 2017-01-04 成都欧林生物科技股份有限公司 A kind of drying and sterilizing device improves mechanism
CN106288742A (en) * 2016-08-29 2017-01-04 成都欧林生物科技股份有限公司 It is conveniently replaceable the disinfection system of heater
CN106369984A (en) * 2016-08-29 2017-02-01 成都欧林生物科技股份有限公司 Tunnel drier based on improving uniformity of dry airflow

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US20150275822A1 (en) * 2014-03-28 2015-10-01 Furness-Newburge, Inc. Supercharged pulse jet engine and related method of use
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CN105575859B (en) * 2016-03-04 2018-07-17 京东方科技集团股份有限公司 A kind of air curtain system
CN106765162A (en) * 2016-12-20 2017-05-31 四川雷鸣生物环保工程有限公司 Circulating flue gas stirring drier
CN106766685A (en) * 2016-12-21 2017-05-31 宁波沪港食品机械制造有限公司 The horizontal fluidization stirring drier of brewex's grains
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Publication number Priority date Publication date Assignee Title
CN106196967A (en) * 2016-08-29 2016-12-07 成都欧林生物科技股份有限公司 A kind of dry sterilization system
CN106225451A (en) * 2016-08-29 2016-12-14 成都欧林生物科技股份有限公司 Based on the tunnel drier improving drying efficiency
CN106288711A (en) * 2016-08-29 2017-01-04 成都欧林生物科技股份有限公司 Tunnel drier based on drying effect
CN106288713A (en) * 2016-08-29 2017-01-04 成都欧林生物科技股份有限公司 A kind of drying and sterilizing device improves mechanism
CN106288742A (en) * 2016-08-29 2017-01-04 成都欧林生物科技股份有限公司 It is conveniently replaceable the disinfection system of heater
CN106369984A (en) * 2016-08-29 2017-02-01 成都欧林生物科技股份有限公司 Tunnel drier based on improving uniformity of dry airflow

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US20110035955A1 (en) 2011-02-17
US8800161B2 (en) 2014-08-12
PL2257751T3 (en) 2013-03-29
CN102016471A (en) 2011-04-13
WO2009115564A1 (en) 2009-09-24
CA2717838C (en) 2016-05-31
RU2490572C2 (en) 2013-08-20
CN102016471B (en) 2013-01-09
RU2010138094A (en) 2012-04-27
CA2717838A1 (en) 2009-09-24
EP2257751A1 (en) 2010-12-08

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