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EP1987303B1 - Sechoir a lit fluidise - Google Patents

Sechoir a lit fluidise Download PDF

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Publication number
EP1987303B1
EP1987303B1 EP07703513A EP07703513A EP1987303B1 EP 1987303 B1 EP1987303 B1 EP 1987303B1 EP 07703513 A EP07703513 A EP 07703513A EP 07703513 A EP07703513 A EP 07703513A EP 1987303 B1 EP1987303 B1 EP 1987303B1
Authority
EP
European Patent Office
Prior art keywords
gas
drying
fluidized bed
bed dryer
dryer according
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.)
Not-in-force
Application number
EP07703513A
Other languages
German (de)
English (en)
Other versions
EP1987303A1 (fr
Inventor
Willem Westerveld
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.)
Ijzerlo Holding BV
Original Assignee
Ijzerlo Holding BV
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Filing date
Publication date
Application filed by Ijzerlo Holding BV filed Critical Ijzerlo Holding BV
Publication of EP1987303A1 publication Critical patent/EP1987303A1/fr
Application granted granted Critical
Publication of EP1987303B1 publication Critical patent/EP1987303B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a fluidized bed dryer for a batch drying of pourable or pourable goods, comprising a drying container having a substantially horizontally extending longitudinal central axis and the interior of which through a gas-permeable and substantially well-screened bottom in a lower, a gas distribution space forming part and a subdivided into a good space forming part, wherein the drying gas is feasible through the at least one gas inlet through the Gut and accessible from the Gutraum by at least one gas vent, the Gutraum by at least one filling and emptying opening with batches of good can be loaded and emptied and wherein the drying container is pivotable about a total axis extending parallel to the longitudinal central axis pivot axis.
  • Fluidized bed dryers are used for a variety of drying tasks, especially in the food industry, the chemical and pharmaceutical industries and agriculture. In this case, in most cases continuous dryers are used, since in general a continuous drying process is preferred.
  • a batch-wise drying also referred to as a batch system, used to avoid disturbing fürönvariabilticianen and to ensure an identical drying for all Gutpartien.
  • a fluidized bed dryer of the type indicated above is made FR 1 568 126 A known.
  • the dryer according to this document has a hollow cylindrical drying container, which is mounted with its outer periphery on circumferentially spaced rollers and which is limited to pivot on these roles back and forth.
  • For the supply of the drying gas in the gas distribution space there is only a single end gas inlet with an upstream fan.
  • the document GB 382 006 A shows a dryer with a horizontal or inclined drum for the material to be dried, wherein the drum is preferably rotatable. Two end walls of the drum are stationary; relative to the drum shell is rotatable. Inside the drum, a gas distribution pipe shut off in its course is arranged, which forms two gas distribution chambers and can be supplied with gas from its two outer ends.
  • the gas distribution pipe is in the operation of the dryer within the drying material and is occupied on its outer circumference with longitudinally extending wings. Through openings in the gas distribution pipe, the gas escapes and thus enters the drying material.
  • a device for treating pourable or flowable material with steam comprises a rotationally symmetrical container which stubs on two tubular axle is rotatably mounted. Immediately before each stub axle, one or more sieves are arranged inside the container, which are permeable to the vapor and impermeable to the treated material. Through one of the tubular stub axle, steam can be supplied to the interior of the container, and the steam can be discharged from the container through the respective other stub axle. It is essential that the direction of vapor flow is regularly reversed.
  • the task of providing an improved fluidized bed dryer of the above type in which in particular ensures that the fluidized bed is reliably formed, the reliability of the formation of the fluidized bed should be as independent of the size of the dryer. It should also be achieved a greater structural design freedom and it should be possible without operational problems and dryers with larger capacities than they offer the known dryer.
  • the stub axle or the continuous axis and the pivot bearing can advantageously be pivoted about its pivot axis of the drying container, wherein a pivoting angle range of up to 360 ° and more, including a not limited in the circumferential direction pivoting, is possible. In most cases, however, a swivel angle range of slightly more than 180 °, e.g. of about 210 °, sufficient to allow on the one hand the pivoting movement for uniform distribution of the material to be dried and on the other hand, to pivot or rotate the drying container in its filling position and emptying position.
  • the stub axle or the hollow end-side portions of the axle advantageously have a dual function, namely the pivotable storage of the drying container and the feeding of the drying gas.
  • This construction according to the invention offers advantages in terms of manufacturing costs and reliability and simplifies the sealing.
  • the technical effort is kept within limits, so that the fluidized bed dryer can be manufactured and operated relatively cost overall.
  • each gas inlet is assigned a gas quantity regulating device, so that the supplied gas quantities can be changed in the desired manner, also time-dependent, for each gas inlet.
  • the gas flow control devices may be, for example, adjustable valves or flaps or orifices in the gas flow path and / or variable-power elements on gas flow generators.
  • the sieve bottom has an elongated, substantially rectangular outline, wherein the corners are executed at right angles or have fillets.
  • an outline shape of the sieve bottom a space-saving design is achieved, which allows a good utilization of a given space or a predetermined installation area for the fluidized bed dryer.
  • the outline may also have rounding.
  • a respective gas inlet opens on a narrow side of the sieve bottom in the gas distribution space.
  • the gas inlets open as far as possible geometrically possible away from each other in the gas distribution space, whereby all areas of the sieve can be applied evenly or if necessary also targeted unevenly with drying gas.
  • the sieve bottom is expediently designed on both its narrow sides, each with a rising end bevel.
  • This shaping improves the guidance of the drying gas along the underside of the sieve bottom in the region of its narrow sides.
  • the layer thickness of the material to be dried in the narrow sides of the sieve bottom is reduced, which leads to reliable formation of the fluidized bed in these areas, even if Here, the drying gas supply is less intense than in the other areas of the sieve.
  • each gas inlet at least one or all gas inlets a common gas conditioning, in particular a gas heater and / or cooler and / or gas dryer and / or humidifier is connected upstream.
  • a common gas conditioning in particular a gas heater and / or cooler and / or gas dryer and / or humidifier is connected upstream.
  • each gas conditioning device is preferably assigned to a bypass gas channel with an adjustable switch, wherein the gas can be guided in selectable proportions by the gas conditioning device and / or the bypass channel, depending on the switch position.
  • the gas can be guided in selectable proportions by the gas conditioning device and / or the bypass channel, depending on the switch position.
  • each gas inlet is preceded by its own controllable gas blower.
  • the control can be done eg by changing the drive power of the gas blower or by adjusting a control element, such as a throttle valve.
  • a control element such as a throttle valve.
  • gas supply to the gas inlets whereby the ratio of the different Gas inlets supplied gas quantities relative to each other during the drying process can be varied.
  • the gas outlet is formed by a stationary gas extraction hood and that the drying tank on its upper side in a pivoted basic position has the filling and emptying opening, which is covered during a drying operation of the fluidized bed dryer of the gas exhaust hood.
  • the drying container requires no adjustable and definable lid for its filling and emptying opening, whereby the drying container itself and the handling of the fluidized bed dryer are kept particularly simple. If the drying container is to perform a pivoting movement during the drying operation, as seen in the circumferential direction of this pivotal movement, the stationary gas extraction hood is so large that even in the end positions of this pivotal movement, the filling and emptying opening still completely covered by the gas exhaust hood.
  • the / each gas outlet is expediently associated with a preferably controllable suction fan, with the negative pressure in the drying container relative to the ambient pressure can be generated.
  • the negative pressure in the drying container relative to the ambient pressure can be generated.
  • the drying container to form its filling and emptying opening over the whole or part of its length is open on the top side and that the drying container is pivoted to its loading with good to be dried in a pivoting position with obliquely upwardly facing, positioned outside the gas exhaust filling and emptying opening.
  • a suitable funding such as a pipeline, a conveyor belt or an emptied container, a batch of material to be dried.
  • the drying container is expedient for its emptying in a pivot position with obliquely to vertically pointing downwards filling and emptying opening pivotable.
  • the emptying can be done here solely by gravity.
  • one or more transport containers or the transport material further transport means, such as a pipeline or a conveyor belt, can be arranged below the drying container.
  • the drying container at least one window, by the operator for an observation of the goods in the Gutraum directly or by means of a camera is possible.
  • the drying container or with at least one of the axle stub or with the axis of a pivot drive is engaged or engageable.
  • the operator can be relieved of heavy physical activities and protected from the associated dangers.
  • the rotary actuator is a contribution to the automation of the fluidized bed dryer and its operation.
  • the axis passes through the interior of the drying container
  • the axis is surrounded in the interior of the drying container with a sheathing profile, which seen in cross section has a standing on the top of rectangular or diamond shape.
  • the other profiles in the drying container are preferably adjustable and / or removable and expandable. In this way, the fluidized bed dryer can be adapted as needed to the specific properties of different drying goods.
  • the fluidized bed dryer according to the invention that in the Gutraum on the sieve plate and / or in a fixed or adjustable distance above the sieve bottom in good and / or above the good one or more temperature and / or humidity sensors are arranged with those in the drying operation a drying gas temperature and / or moisture and / or a drying gas temperature and / or drying gas moisture distribution can be detected and that the gas conditioning devices can be controlled or regulated in accordance with measured values detected by the sensor (s).
  • the sensors and the control or regulation of the course of the drying in accordance with the measured values recorded by these sensors an extensive control of the drying process and an automatic control or regulation of the drying process as required is possible. This contributes significantly to a good quality of drying and the highest possible protection of the material to be dried while at the same time drying as quickly as possible with the lowest expenditure of energy.
  • one or more temperature and / or humidity sensors are arranged in the gas distribution chamber, with which a drying gas temperature and / or humidity and / or a drying gas temperature and / or drying gas moisture distribution can be detected in the drying operation before flowing through the goods /, and that the gas conditioners are controllable or controllable according to measurements taken by the sensor (s).
  • An interesting parameter in the operation of a fluidized bed dryer is the weight or weight decrease of the material to be dried over time in the drying tank.
  • the invention provides that the fluidized bed dryer is arranged in a support frame on weighing elements with which in the drying operation, the weight and / or weight changes of the goods in the drying container can be detected, and that the gas conditioning and / or the gas blower are controllable or controllable for the drying gas in accordance with measured values detected by the weighing elements.
  • the detection of the weight or of the weight changes is relatively easy here via the weighing elements, which can advantageously provide reliable measured values during the entire drying operation, because the fluidized-bed dryer or parts thereof are not vibrated during operation, like this one is common in many dryers according to the prior art.
  • vibrations make a weight detection on the relatively simple weighing elements impossible, so far a weight detection was only possible intermittently each with vibration device switched off.
  • the fluidized bed dryer according to the invention is a continuous detection of Weight or changes in weight of the goods in the drying container during operation possible, allowing a reliable and continuous monitoring of the drying process and needs-based changes in the operating parameters of the fluidized bed dryer without delay.
  • the sieve bottom is formed by a perforated plate covered with wire mesh fabric or solely by a self-supporting perforated plate.
  • a sieve tray is statically sufficiently loadable and on the other hand offers the desired fine distribution of the drying gas over many flow paths, which is necessary for the production of a fluidized bed or a fluidized bed.
  • the sieve bottom as a whole or possibly the laid-up wire mesh fabric can be an exchangeable component of the fluidized bed dryer.
  • FIG. 1 shows a fluidized bed dryer 1 in a front view.
  • the central part of the fluidized bed dryer 1 forms a Trocknurigs considereder 2, which has an oblong-rectangular outline in plan view.
  • the drying container 2 is mounted in a support frame 5 so that it is pivotable about a horizontally and parallel to the longitudinal direction of the drying container 2 extending pivot axis 29.
  • the drying container 2 at its two left and right lying in Figure 1 end faces each have a stub axle 24 and 24 '.
  • These stub axles 24 and 24 ' are mounted in two pivot bearings 14 and 14', whereby the pivoting of the drying container 2 is made possible about the pivot axis 29.
  • pivoting serves a pivot drive 15, for example with an electric motor and means for transmitting a pivoting of the drying container 2 causing torque thereon, which is preferably done by means of a gear arrangement or by means of a chain and two pinions or by means of a friction drive.
  • a plurality of viewing windows 25 are provided, which are glazed and through which operating personnel can look into the interior of the drying container 2.
  • the gas conditioning devices 3 and 3 ' By means of the gas conditioning devices 3 and 3 ', two drying gas streams can be conditioned, in particular with regard to their temperature and / or their moisture. From the gas conditioning devices 3 and 3 ', the drying gas is passed through the hollow stub axle 24 and 24' in the drying tank 2.
  • the entire fluidized bed dryer 1 is mounted on a two-part support frame 5, wherein the support frame 5 comprises an upper and lower frame part. Between the two parts of the support frame 5 more, here four, weighing elements 50 are arranged, with which the weight or weight changes of the fluidized bed dryer 1 can be detected during operation.
  • the weight or a change in weight of a batch of drying material located in the drying container 2 during a drying process can be recorded continuously or at dense time intervals.
  • FIG. 2 shown vertical longitudinal section through the fluidized bed dryer 1 sets the internal structure in particular of the drying container 2 open.
  • the drying container 2 via its stub axles 24 and 24 'in the pivot bearings 14 and 14' mounted so that it is pivotable about the pivot axis 29.
  • the already described pivot drive 15 is used for pivoting the already described pivot drive 15.
  • the drying gas streams treated by the gas conditioning means 3 and 3 ' are first introduced through the gas fans 32 and 32' through the hollow stub axles 24 and 24 'into a lower part of the drying tank 2, this lower part forming a gas distribution space 21.
  • a gas-permeable, but substantially well-insulated sieve plate 20 From an overlying Gutraum 22 of the gas distribution space 21 is separated by a gas-permeable, but substantially well-insulated sieve plate 20.
  • the sieve bottom 20 is preferably formed by a perforated plate covered with wire mesh or solely by a self-supporting perforated plate.
  • the two drying gas streams arrive from the hollow stub axles 24 and 24 'coming via an end gas inlet 23 and 23' in the gas distribution space 21.
  • the sieve plate 20 is carried out with end-face end slopes 20 '. This is as a detail right in FIG. 2 shown again on an enlarged scale.
  • the End slopes 20 'of the sieve bottom 20 ensure a favorable flow course of the drying gas streams from the hollow stub axles 24 and 24' into the gas distribution space 21.
  • the sieve plate 20 is in operation of the fluidized bed dryer 1, a batch of material to be dried in the form of a first still compact good position, the good consists of individual particles and thus is free-flowing.
  • the drying gas flowing through the sieve bottom 20 from the bottom to the top ensures the production of a fluidized bed of the particles of the material to be dried, whereby the material to be dried comes into intensive contact with the drying gas.
  • the drying gas absorbs moisture from the material to be dried and promotes this moisture as steam through the gas vent 26 from.
  • the gas vent 26, which is not shown separately in Figure 2, expediently assigned its own suction fan to set a negative pressure relative to the ambient pressure inside the drying vessel 2. This negative pressure prevents escape of particles and gas from the interior of the drying container 2 into the environment.
  • sensors 41 and 42 are provided with which the temperature and / or humidity of the drying gas in the gas distribution space 21 and in the Gutraum 22 can be detected and used for a control or regulation of the fluidized bed dryer 1.
  • FIG. 2 it can be seen that the fluidized bed dryer 1 rests in total on the support frame 5 with the upper and lower frame part and the weighing elements 50 arranged therebetween.
  • the drying container 2 is pivoted so far about the pivot axis 29 by means of the pivot drive 15 that the in FIG. 2 invisible open top of the drying tank 2 obliquely upwards outside the gas exhaust hood 27 is located.
  • the material to be dried can be introduced into the drying container 2.
  • the drying gas streams which are generated in the gas conditioning 3 and 3 'and then passed from bottom to top through the sieve plate 20, the fluidized bed is generated in the Gutraum 22 of the drying tank 2.
  • the pivoting movement of the drying container 2 can also be performed during the drying process, at least at the beginning of the drying process.
  • temporal variation, in particular periodic variation, of the two drying gas streams generated by the two gas conditioning devices 3 and 3 ' the formation of the fluidized bed can be specifically influenced and optimized as required.
  • the ratio of the gas throughput through the two gas inlets 23 and 23 'over time the formation of the fluidized bed and thus the drying process can be positively influenced overall.
  • the entire drying process is detected and controlled by the sensors 41 and 42 and the weighing elements 50 and an electronic device not specifically shown here and controlled or regulated.
  • the drying container 2 When the drying process is completed, the drying container 2 is pivoted from its basic position by about 180 ° downwards, whereby a discharge of the drying container 2 by gravity takes place.
  • a bulk guide 51 is arranged below the drying container 2, which has approximately the shape of two adjacent funnels here. This bulkhead 51 serves to guide the dried material in two containers, not shown here, which can be placed in the lower part of the support frame 5.
  • FIG. 3 shows the fluidized bed dryer 1 in a side view of his in the FIGS. 1 and 2 left front side.
  • the gas outlet 26 with the gas hood 27 is partially visible.
  • the observer faces the one gas conditioning device 3 with its gas heater 31 and its gas blower 32. Behind it is largely concealed the drying container 2.
  • FIG. 4 shows the fluidized bed dryer 1 in a vertical cross section.
  • the drying container 2 is visible in cross section.
  • the lower one Part of the drying container 2 forms the gas distribution space 21, which is separated by the sieve bottom 20 of the overlying Gutraum 22.
  • the Gutraum 22 extends at a small distance to the sieve plate 20 parallel to this and perpendicular to the plane of the drawing, the pivot axis 29 of the drying container. 2
  • the open upper side of the drying container 2 forms its filling and emptying opening 28.
  • the drying container 2 is in a non-pivoted basic position in which the opening 28 is completely covered by the gas exhaust hood 27.
  • the gas exhaust hood 27 has the shape of a cylinder jacket section whose center axis coincides with the pivot axis 29. In this way, there is the possibility that the drying container 2 in the drying operation by a certain pivot angle about the pivot axis 29 relative to the stationary gas exhaust hood 27 can be pivoted back and forth without the opening 28 moves under the gas exhaust hood 27.
  • the bulkhead 51 Below the drying container 2 is the bulkhead 51. This occurs during the emptying of the drying container 2 in function, to which the latter pivoted by the pivot drive 15 by about 180 ° about the pivot axis 29 is, so that then its opening 28 down, so the bulk guide 51, points.
  • the dried material then falls under gravity out of the drying tank 2 and out through the bulkhead 51 in not shown here container for further transport and / or storage of the dried material.
  • the drying gas used in the operation of the fluidized bed dryer 1 may be, for example, air; for special cases, the use of, for example, nitrogen or other special protective gases is conceivable.
  • the graphic representation of the embodiment of the fluidized bed dryer 1 illustrates its particularly compact design and the particularly simple loading and unloading of the drying container 2.
  • the possibility of pivoting the drying container 2 about its central position and the possibility of targeted variation of the two drying gas flows is very shortly after the charging of the drying container 2 with a batch of material to be dried produces a good fluidized bed so that, for example, sensitive seed with relatively high temperatures of the drying gas, in practice up to about 50 to 60 ° C, can be dried.
  • such high temperatures for some dry goods, such as seeds, too high but arises in operation of this fluidized bed dryer 1 due to the very good mixing of drying material and drying gas in the fluidized bed a very high evaporation of moisture, especially water from the Trocknungsgut.
  • the combination of the pivotability of the drying container 2 with the special drying gas supply allows the drying of even very large amounts of drying yarn in practice, e.g. up to several hundred kilograms or more. This enables a particularly effective operation, whereby it is ensured that each drying charge is dried exactly the same. This ensures a homogeneous product quality.

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

Claims (22)

  1. Séchoir à lit fluidisé (1) pour un séchage par charge de marchandises capables d' être versées ou coulantes, comprenant un récipient de séchage (2) qui présente un axe médian longitudinal s' étendant essentiellement horizontalement et dont l'intérieur est divisé par un fond à tamis (20) perméable aux gaz et essentiellement imperméable aux marchandises en une partie inférieure formant un espace de distribution gazeuse (21) et une partie supérieure formant un espace de marchandises (22), dans lequel du gaz de séchage peut être amené à l'espace de distribution gazeuse (21) par au moins une entrée de gaz (23, 23' ), dans lequel le gaz de séchage peut être guidé à travers la marchandise en formant un lit fluidisé et peut être évacué de l'espace de marchandises (22) à travers au moins une évacuation gazeuse (26), dans lequel l' espace de marchandises (22) peut être alimenté et purgé avec des charges de marchandise à travers au moins une ouverture de remplissage et de purge (28), et dans lequel le récipient de séchage (2) peut être pivoté dans son ensemble autour d' un axe de pivotement (29) s' étendant parallèlement à l'axe médian longitudinal,
    caractérisé en ce
    - qu' au moins deux entrées de gaz (23, 23' ) disposées à l'écart l'une de l'autre, à travers lesquelles du gaz de séchage peut être amené à chaque fois à l'espace de distribution gazeuse (21), sont prévues,
    - que le récipient de séchage (2) est logé dans au moins deux paliers pivotants (14, 14' ) en vue de son pivotement sur ses deux côtés frontaux au moyen à chaque fois d' un tronçon d' axe (24, 24' ) ou au moyen d' un axe traversant l'intérieur du récipient de séchage (2), dépassant du côté frontal, et
    - que les tronçons d' axe (24, 24' ) ou au moins des sections frontales de l'axe sont creux/creuses et que le gaz de séchage peut être guidé à travers les tronçons d' axe (24, 24' ) ou des sections creuses de l'axe dans l'espace de distribution gazeuse (21).
  2. Séchoir à lit fluidisé selon la revendication 1, caractérisé en ce qu' un dispositif de régulation de quantité gazeuse est associé à chaque entrée de gaz (23 et 23' ).
  3. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 2, caractérisé en ce que le fond à tamis (20) a un contour oblong, essentiellement rectangulaire, dans lequel les coins sont réalisés à angle droit ou présentent des arrondis.
  4. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu' une entrée de gaz (23, 23' ) débouche à chaque fois sur un côté étroit du fond à tamis (20) dans l'espace de distribution gazeuse (21).
  5. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le fond à tamis (20) est réalisé sur ses deux côtés étroits avec à chaque fois un biseau d' extrémité croissant (20' ).
  6. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu' au moins un dispositif de conditionnement gazeux propre (3, 3' ) est monté en amont de chaque entrée de gaz (23, 23' ) ou un dispositif de conditionnement gazeux commun (3, 3' ) est monté en amont de toutes les entrées de gaz (23, 23' ), notamment un dispositif de chauffage et/ou un refroidisseur de gaz (31, 31' ) et/ou un séchoir et/ou un humidificateur de gaz.
  7. Séchoir à lit fluidisé selon la revendication 6, caractérisé en ce qu' un canal de gaz de dérivation avec un dispositif de séparation réglable est associé à chaque dispositif de conditionnement gazeux (3, 3' ), dans lequel le gaz peut être guidé en fonction de la position du dispositif de séparation en proportions quantitatives pouvant être sélectionnées à travers le dispositif de conditionnement gazeux (3, 3' ) et/ou le canal de gaz de dérivation.
  8. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu' une soufflante gazeuse propre pouvant être régulée (32, 32' ) est montée en amont de chaque entrée de gaz (23, 23' ).
  9. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'évacuation gazeuse (26) est formée par un dôme d' évacuation gazeuse stationnaire (27) et que le récipient de séchage (2) présente sur son côté supérieur dans une position de base non pivotée l'ouverture de remplissage et de purge (28) qui est recouverte par le dôme d' évacuation gazeuse (27) pendant un mode de séchage du séchoir à lit fluidisé (1).
  10. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu' une soufflante d' aspiration pouvant de préférence être régulée avec laquelle une dépression par rapport à la pression ambiante peut être générée dans le récipient de séchage (2) est associée à l' chaque évacuation gazeuse (26).
  11. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le récipient de séchage (2) est ouvert sur le côté supérieur en vue de la formation de son ouverture de remplissage et de purge (28) sur l'intégralité ou une partie de sa longueur et que le récipient de séchage (2) peut être pivoté en vue de son alimentation avec de la marchandise à sécher dans une position de pivotement avec l'ouverture de remplissage et de purge (28) tournée vers le haut en biais, positionnée en dehors du dôme d' évacuation gazeuse (27).
  12. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le récipient de séchage (2) peut être pivoté en vue de sa purge dans une position de pivotement avec l'ouverture de remplissage et de purge (28) tournée vers le bas en biais jusqu' à verticalement.
  13. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que le récipient de séchage (2) présente au moins une fenêtre (25) à travers laquelle une surveillance de la marchandise dans l'espace de marchandises (22) est possible pour le personnel de manoeuvre directement ou au moyen d' une caméra.
  14. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 13, caractérisé en ce qu'un entraînement pivotant (15) est en engrènement ou peut être amené en engrènement avec le récipient de séchage (2) ou avec au moins un des tronçons d' axe (24, 24' ) ou avec l'axe.
  15. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que l'axe traversant l'intérieur du récipient de séchage (2) est entouré d' un profil d' enveloppe (29' ) à l'intérieur du récipient de séchage (2) qui a une forme rectangulaire ou rhombique se tenant sur une pointe vu en coupe transversale.
  16. Séchoir à lit fluidisé selon la revendication 15, caractérisé en ce que d' autres profils (29' ) de forme identique en coupe transversale peuvent être montés avec un écart réciproque dans le récipient de séchage (2) parallèlement au profil d' enveloppe (29' ), outre celui-ci.
  17. Séchoir à lit fluidisé selon la revendication 16, caractérisé en ce que les autres profils (29' ) peuvent être réglés et/ou montés et démontés dans le récipient de séchage (2).
  18. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 17, caractérisé en ce que l' espace de marchandises (22) s'élargit vers le haut en s'éloignant du fond à tamis (20) vu en coupe transversale.
  19. Séchoir à lit fluidisé selon l'une quelconque des revendications 6 à 18, caractérisé en ce qu' un ou plusieurs capteurs de température et/ou d' humidité (42) sont disposés dans l'espace de marchandises (22) sur le fond à tamis (20) et/ou à une distance fixe ou réglable au-dessus du fond à tamis (20) dans la marchandise et/ou au-dessus de la marchandise, avec lesquels une température et/ou une humidité du gaz de séchage et/ou une distribution de température du gaz de séchage et/ou d' humidité du gaz de séchage est/peuvent être détectée(s) en mode de séchage, et que les dispositifs de conditionnement gazeux (3, 3' ) peuvent être commandés ou régulés en fonction de valeurs mesurées détectées par le(s) capteur(s) (42).
  20. Séchoir à lit fluidisé selon l'une quelconque des revendications 6 à 19, caractérisé en ce qu' un ou plusieurs capteurs de température et/ou d' humidité (41) sont disposés dans l'espace de distribution gazeuse (21), avec lesquels une température et/ou une humidité du gaz de séchage et/ou une distribution de température du gaz de séchage et/ou d' humidité du gaz de séchage est/peuvent être détectée(s) en mode de séchage avant le passage de la marchandise, et que les dispositifs de conditionnement gazeux (3, 3' ) peuvent être commandés ou régulés en fonction de valeurs mesurées détectées par le(s) capteur(s) (41).
  21. Séchoir à lit fluidisé selon l'une quelconque des revendications 6 à 20, caractérisé en ce qu' il est disposé dans un cadre porteur (5) sur des éléments de pesage (50) avec lesquels le poids et/ou des modifications pondérales de la marchandise dans le récipient de séchage (2) peut/peuvent être détecté(s) en mode de séchage, et que les dispositifs de conditionnement gazeux (3, 3' ) et/ou les soufflantes gazeuses (32, 32' ) pour le gaz de séchage peuvent être commandés ou régulés en fonction de valeurs mesurées détectées par les éléments de pesage (50).
  22. Séchoir à lit fluidisé selon l'une quelconque des revendications 1 à 21, caractérisé en ce que le fond à tamis (20) est formé d' une tôle perforée garnie de treillis de fils métalliques ou seulement d' une tôle perforée non soutenue.
EP07703513A 2006-02-20 2007-02-17 Sechoir a lit fluidise Not-in-force EP1987303B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610008100 DE102006008100B8 (de) 2006-02-20 2006-02-20 Verfahren zum Trocknen von Gütern in einem Wirbelschichttrockner und Wirbelschichttrockner
PCT/EP2007/001387 WO2007096103A1 (fr) 2006-02-20 2007-02-17 Procede de sechage DE produitS dans un sechoir a liT fLUIDise et sechoir a liT flUiDIse

Publications (2)

Publication Number Publication Date
EP1987303A1 EP1987303A1 (fr) 2008-11-05
EP1987303B1 true EP1987303B1 (fr) 2012-09-05

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Application Number Title Priority Date Filing Date
EP07703513A Not-in-force EP1987303B1 (fr) 2006-02-20 2007-02-17 Sechoir a lit fluidise

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EP (1) EP1987303B1 (fr)
DE (1) DE102006008100B8 (fr)
DK (1) DK1987303T3 (fr)
WO (1) WO2007096103A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109539702B (zh) * 2018-12-24 2024-05-14 北京翰林航宇科技发展股份公司 一种流化床用分布板及流化床

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GB382006A (en) * 1931-08-15 1932-10-20 Gustav Bojner Improvements in apparatus for carrying out heat exchange processes

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GB382006A (en) * 1931-08-15 1932-10-20 Gustav Bojner Improvements in apparatus for carrying out heat exchange processes

Also Published As

Publication number Publication date
DK1987303T3 (da) 2012-12-10
DE102006008100B3 (de) 2007-09-27
DE102006008100B8 (de) 2009-02-12
EP1987303A1 (fr) 2008-11-05
WO2007096103A1 (fr) 2007-08-30
WO2007096103A8 (fr) 2007-11-08

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