EP1987303A1 - Verfahren zum trocknen von gütern in einem wirbelschichttrockner und wirbelschichttrockner - Google Patents
Verfahren zum trocknen von gütern in einem wirbelschichttrockner und wirbelschichttrocknerInfo
- Publication number
- EP1987303A1 EP1987303A1 EP07703513A EP07703513A EP1987303A1 EP 1987303 A1 EP1987303 A1 EP 1987303A1 EP 07703513 A EP07703513 A EP 07703513A EP 07703513 A EP07703513 A EP 07703513A EP 1987303 A1 EP1987303 A1 EP 1987303A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- drying
- bed dryer
- fluidized bed
- 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.)
- Granted
Links
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
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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
Definitions
- the present invention relates to a process for the batchwise drying of free-flowing or flowable goods in a fluidized bed dryer with a drying container having a substantially horizontally extending longitudinal axis and its interior through a gas-permeable and substantially well-sealed sieve bottom in a lower, a gas distribution space forming part and an upper, a good space-forming part is divided, wherein the gas distribution space is supplied by at least one gas inlet drying gas, wherein the drying gas flows through the material under formation of a fluidized bed and is withdrawn from the Gutraum by at least one gas vent and wherein the Gut- space by at least one Filling and emptying opening is charged with batches of goods and emptied.
- the invention relates to a fluidized bed dryer for a batch drying of pourable or pourable goods, comprising a drying container having a substantially horizontal longitudinal axis and its interior through a gas-permeable and substantially well-sealed sieve bottom in a lower, a gas distribution space forming part and a is subdivided into an upper part, which forms a good space, whereby the gas distribution space is defined by at least one gas inlet lass drying gas can be supplied, wherein the drying gas with the formation of a fluidized bed through the Good feasible and from the Gutraum by at least one gas vent can be discharged and wherein the Gutraum by at least one filling and emptying opening with batches of good can be loaded and emptied.
- 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.
- the apparatus comprises a generally round bed for receiving the particles, the bed having a substantially centered annular inner bed wall, an outer bed wall and an irregular bottom. Further, the apparatus has a drive mechanism which is rotatably mounted on the bed, the rotation of the drive mechanism at a predetermined speed with the aid of imbalance masses generates a horizontal and vertical vibration of the spring-mounted device and its bed, resulting in a particle flow in desired directions leads. Finally, the device has an air-conditioning system ge, which supplies the bed tangentially a heated and / or cooled air flow. There is a version with two air inlets through which air is blown tangentially into a circular space below the bottom of the bed.
- DE 600 17 267 T2 shows a device for removing a liquid component from finely divided solids.
- the apparatus comprises a stationary cylindrical housing and a round perforated plate dividing the housing into a first chamber and a second chamber, the first chamber being a gas introduction chamber and the second chamber being a reaction / drying chamber. Furthermore, the apparatus has means for feeding the finely divided solid into the second chamber and a gas outlet system for removing the gases from the second chamber.
- the first chamber is provided with a first gas inlet and a second gas inlet, wherein the first gas inlet and the second gas inlet are separated from each other, that the first gas inlet is provided in the bottom of the first chamber and the gas an axial Direction lends that the second gas inlet is disposed below the plate and the gas gives a component in the tangential direction, that the perforated plate is provided with an outlet opening, which is provided with a removable plug for releasing and closing the outlet opening, and that heaters for heating the gases introduced via the first gas inlet and the second gas inlet are provided.
- a device for the treatment of particulate material wherein the device has a process chamber.
- a bottom of the process chamber is made up of overlapping guide plates. builds between which slots are formed.
- the guide plates are designed as ring plates, so that circular slots are formed.
- the ring plates are laid so that a radially outer from the outside inward first flow and a radially inner, directed from the inside out second flow of passing process air is formed, the two oppositely flows meet along a circular break-up zone and into a vertical to be deflected upward flow.
- the drying chamber has the shape of a standing cylinder, which does not bother with smaller dryers, but increasingly leads to problems with larger dryers, because with increasing diameter, the desired formation of the fluidized bed is more difficult or impossible to achieve .
- the cylindrical shape is structurally unfavorable, because at a given dryer capacity a large space, especially a large area, claimed. This leads in practice to the fact that often multiple dryers must be used in parallel to achieve a required drying capacity, which causes disadvantageous high investment and operating costs.
- the task of providing a method and a fluidized bed dryer of the type mentioned above which avoid the disadvantages set out and in which in particular ensures that the fluidized bed is reliably formed, the reliability of the formation of the fluidized bed as independent as possible the size of the dryer should be.
- the fluidized bed dryer should also be achieved a greater structural design freedom and it should be feasible without operational problems and dryers with larger capacities than they offer the known dryer.
- the material to be dried a batch of material is evenly distributed on the sieve plate by the oscillating pivoting movement.
- supplying the drying gas through the at least two gas inlets spaced apart a particularly effective and targeted influence on the formation of the fluidized bed in the drying tank is made possible.
- the inventive method advantageously ensures that the desired fluidized bed of the material to be dried is formed very quickly and with high reliability. In this case, unwanted disturbances in the fluidized bed, in particular on the one hand compact, not moving in good areas and / or on the other hand good-free areas on the sieve bottom, avoided.
- the method ensures a uniform distribution of the introduced into the drying container to be dried goods, there is a great deal of freedom in terms of the design of the drying container, especially in terms of its geometry.
- Possible night-time Ie which are at first glance associated with a particular geometry of the drying container, are completely compensated by the pivoting movement according to the invention and special feeding of the drying gas. In this way, significantly larger batches of material can be dried reliably and with a reproducible drying result than in the known prior art.
- a preferred embodiment of the method according to the invention provides that the ratio of the amounts of the drying gas supplied through the at least two gas inlets is varied relative to one another in a time-dependent, preferably temporally periodic manner. This contributes to a uniform and effective drying of the material.
- the above-described drying process can be carried out reliably.
- the technical effort is kept within limits, so that the fluidized bed dryer can be manufactured and operated relatively cost overall.
- An advantage of the fluidized bed dryer according to the invention is that it is suitable for his Operation no vibration device is required, which always leads to a complex and expensive construction of a vortex - layer dryer.
- the lack of a vibration device advantageously results in simpler weighing and control options because vibrations particularly disturb weighing processes.
- 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 quantity regulating devices may be e.g. 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 elongate, substantially rectangular outline.
- 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 plate can be uniformly or if necessary also targeted unevenly supplied 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 TrocknungsgasZu Installation 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 time-dependent for example temporally periodic, varying gas supply to the gas inlets, whereby the ratio of the different gas inlets supplied gas quantities can be varied relative to each other during the drying process.
- 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, the stationary gas extraction hood is designed so large in the circumferential direction of this pivoting movement that even in the end positions of this pivoting movement the filling and emptying opening still remains completely covered by the gas extraction hood.
- each gas deduction associated with a preferably controllable suction fan with the negative pressure in the drying vessel relative to the ambient pressure can be generated.
- at least one air flow of ambient air can reach the inside of the dryer at leaks of the drying container, while conversely an escape of particles from the interior of the dryer is precluded.
- the drying container is pivotable to its loading in a pivoting position with obliquely upwardly facing, positioned outside the gas exhaust hood filling and emptying opening.
- the filling and emptying opening is exposed and it can be connected via a suitable conveying means, e.g. a pipeline, a conveyor belt or an emptied container, a batch of goods to be dried are easily filled into the drying container.
- a suitable conveying means e.g. a pipeline, a conveyor belt or an emptied container
- 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 through which the operator an observation of the goods in the Gutraum directly or by means of a camera is possible.
- the drying container is expediently mounted in at least two pivot bearings for pivoting it at its two end faces by means of a respective stub axle or by means of a through the inside of the drying container, frontally projecting axis.
- a pivoting angle range of up to 360 ° and more, including a not limited in the circumferential direction pivoting, is possible.
- 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 at least frontal portions of the axis are hollow and that the drying gas through the stub axle or hollow portions of the axis in the gas distribution space can be guided.
- the stub axle or the hollow end portions of the axle have a dual function, which offers advantages in terms of manufacturing costs and reliability and simplifies sealing.
- 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 Ummets- profile, seen in cross-section has a standing on top of a rectangular or diamond shape .
- the drying gas flow above the material to be dried, and thus the formation of the fluidized bed can be influenced, in particular excessive swirling of the individual particles of the material to be dried can be avoided.
- a profile of corresponding shape can be arranged at the same location for the same purpose.
- 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.
- one or more temperature and / or humidity sensors are arranged in the gas distribution space, with which a drying gas temperature and / or moisture and / or a drying gas temperature and / or drying gas moisture distribution in the drying operation before flowing through the goods can be detected, and that the gas conditioning devices are controllable or controllable according to measured values recorded 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 can be used in total or, if necessary,.
- the laid wire mesh fabric is an exchangeable component of the fluidized bed dryer.
- FIG. 2 shows the fluidized-bed dryer from FIG. 1 in a vertical longitudinal section
- Figure 3 shows the fluidized bed dryer according to Figures 1 and 2 in side view on its left in Figure 1 side and Figure 4 shows the fluidized bed dryer according to Figures 1 to 3 in a vertical cross-section.
- FIG. 1 shows a fluidized-bed dryer 1 in a frontal view.
- the central part of the fluidized-bed dryer 1 is formed by a drying container 2, which in plan view has an oblong-rectangular outline.
- 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 drying container 2 At its side facing upward in FIG. 1 in a non-pivoted basic state, the drying container 2 is open over approximately its entire length, the open upper side forming a filling and emptying opening. Alternatively, the filling and emptying opening seen shorter in the longitudinal direction of the drying container 2 and extend over only a part of its length.
- a stationary gas exhaust hood 27 In the unconverted basic position of the drying container 2 shown in FIG. 1, its upper, open side is covered by a stationary gas exhaust hood 27.
- the gas exhaust hood 27 forms part of a gas outlet 26.
- the two gas conditioning devices 3 and 3 ' each comprise a visible in Figure 1 gas heater 31 and 31' and hides behind each ever a gas blower.
- 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.
- the vertical longitudinal section through the fluidized-bed dryer 1 shown in FIG. 2 sets out the internal structure, in particular dere 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 pass from the hollow stub axles 24 and 24 'via an end gas inlet 23 or 23' into the gas distribution space 21.
- the sieve plate 20 is executed with front-end end slopes 20 '. This is again shown as a detail on the right in FIG. 2 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, suitably associated with its own suction fan to set a negative pressure relative to the ambient pressure in the interior of the drying container 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.
- the fluidized-bed dryer 1 as a whole rests on the support frame 5 with the upper and lower frame parts 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 not visible in Figure 2 open top of the drying container 2 obliquely upwardly outside the gas exhaust hood 27 is located.
- the material to be dried can be introduced into the drying container 2.
- the material to be dried is evenly distributed over the sieve bottom 20.
- the fluidized bed is produced in the good space 22 of the drying container 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 its left-hand side in FIGS. 1 and 2.
- the gas outlet 26 with the gas exhaust 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.
- the fluidized-bed dryer 1 rests on the two-part support frame 5, between the upper and lower parts of which the weighing elements 50 are arranged.
- 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
- the gas exhaust hood 27 has the shape of a cylinder jacket section, whose central axis with the pivot axis
- the bulk guide 51 Below the drying container 2 is the bulk guide 51. This occurs when emptying the drying container 2 in function, including the latter by the pivot drive 15 by about 180 ° about the pivot axis 29 is pivoted, so that then its opening 28 downwards, so the bulkhead 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 0 C, can be dried.
- the temperature of the drying gas in the drying container 2 and the change in weight of the material to be dried can be detected continuously or at short intervals, the end of the moisture release from the material to be dried can be detected exactly, so that the further drying can then be stopped immediately before an excessively high Temperature of the material to be dried may result, which could lead to damage to this.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
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- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
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 (de) | 2006-02-20 | 2007-02-17 | Verfahren zum trocknen von gütern in einem wirbelschichttrockner und wirbelschichttrockner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1987303A1 true EP1987303A1 (de) | 2008-11-05 |
EP1987303B1 EP1987303B1 (de) | 2012-09-05 |
Family
ID=38120336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07703513A Not-in-force EP1987303B1 (de) | 2006-02-20 | 2007-02-17 | Wirbelschichttrockner |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1987303B1 (de) |
DE (1) | DE102006008100B8 (de) |
DK (1) | DK1987303T3 (de) |
WO (1) | WO2007096103A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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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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GB191312231A (en) * | 1912-08-26 | 1914-01-15 | Theodor Otto Franke | An Improved Process and Apparatus for Heating Material Containing Liquid. |
GB382006A (en) * | 1931-08-15 | 1932-10-20 | Gustav Bojner | Improvements in apparatus for carrying out heat exchange processes |
FR1568126A (de) | 1968-02-14 | 1969-05-23 | ||
NL7008485A (de) * | 1970-06-11 | 1971-12-14 | ||
US4038760A (en) * | 1976-05-10 | 1977-08-02 | Monck John M | Crop drying apparatus |
PL103840B1 (pl) * | 1976-11-30 | 1979-07-31 | Akad Ekonom | Sposob wytwarzania pulsujacej warstwy fluidalnej i urzadzenie do wytwarzania pulsujacej warstwy fluidalnej |
JPS6036821B2 (ja) * | 1978-07-04 | 1985-08-22 | 三菱電機株式会社 | 流動浸漬塗装方法 |
JPS58501805A (ja) * | 1981-10-27 | 1983-10-27 | ハムブロ マシナリ リミテツド | コンディショニング装置 |
US4615123A (en) * | 1984-11-23 | 1986-10-07 | Brown Ernest C | Apparatus for the continuous treatment of solid particles in a fluidized state |
US4696115A (en) * | 1986-07-22 | 1987-09-29 | Nabisco Brands, Inc. | Method and apparatus for drying wet particulate material to a predetermined uniform moisture content |
GB2195428A (en) * | 1986-09-26 | 1988-04-07 | Reekie Manufacturing | Batch dryer control system |
DE3902271A1 (de) * | 1988-03-12 | 1989-09-21 | Buehler Ag Geb | Verfahren zum behandeln von schuettgut und vorrichtungen und anlage dazu |
DE19520453A1 (de) * | 1995-06-03 | 1996-12-05 | Zens Maschinenbau Gmbh | Verfahren zum Trocknen von oberhalb einer Auflage befindlichem Gut und Vorrichtung zum Trocknen |
FR2759304B1 (fr) * | 1997-02-11 | 1999-04-02 | Pierre Jules Hinderer | Procede de traitement en continu de matieres pulverulentes en vrac et installation permettant sa mise en oeuvre |
IT1291059B1 (it) * | 1997-02-12 | 1998-12-14 | Comas Spa | Macchina essiccatrice per tabacco trinciato, in particolare per costole di tabacco trinciate ed espanse |
GB2324744A (en) * | 1997-04-29 | 1998-11-04 | Canada Majesty In Right Of | Pulsed fluidised bed |
IT1299709B1 (it) * | 1998-03-04 | 2000-04-04 | Garbuto Spa | Essiccatore a letto fluido, particolarmente per l'essiccazione del tabacco. |
EP1204836B1 (de) * | 1999-08-17 | 2005-01-05 | Unilever N.V. | Vorrichtung zum entfernen eines flüssigkeitsbestandteils aus feinkörnigen festen stoffen |
GB0014800D0 (en) * | 2000-06-19 | 2000-08-09 | Perry Ophneil H | Batch operatating de-coating apparatus |
AT410287B (de) * | 2001-05-25 | 2003-03-25 | Tribovent Verfahrensentwicklg | Einrichtung zum pyrometallurgischen aufarbeiten von abfallstoffen |
DE10129166C1 (de) * | 2001-06-12 | 2003-01-16 | Herbert Huettlin | Vorrichtung zum Behandeln von partikelförmigem Gut |
WO2003047360A1 (en) * | 2001-12-03 | 2003-06-12 | Mars Incorporated | Coating and drying apparatus |
GB2384161A (en) * | 2001-12-04 | 2003-07-23 | Powder Conditioning Ltd | Conditioning powders |
-
2006
- 2006-02-20 DE DE200610008100 patent/DE102006008100B8/de not_active Expired - Fee Related
-
2007
- 2007-02-17 WO PCT/EP2007/001387 patent/WO2007096103A1/de active Application Filing
- 2007-02-17 DK DK07703513.7T patent/DK1987303T3/da active
- 2007-02-17 EP EP07703513A patent/EP1987303B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2007096103A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1987303B1 (de) | 2012-09-05 |
WO2007096103A1 (de) | 2007-08-30 |
WO2007096103A8 (de) | 2007-11-08 |
DE102006008100B3 (de) | 2007-09-27 |
DK1987303T3 (da) | 2012-12-10 |
DE102006008100B8 (de) | 2009-02-12 |
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