DE102011085113A1 - Method for drying e.g. drying substance, involves feeding drying air from one chamber through drying substance into other chamber, and feeding back drying air from latter chamber through drying substance into former chamber - Google Patents

Abstract

The method involves feeding drying air from one of two chambers (7, 12) of a container (2) through a drying substance (5) into the other chamber, where the container is divided into the chambers by the drying substance. The drying air is fed back from the latter chamber through the drying substance into the former chamber, where each chamber is provided with a drying air application unit. The drying air application units are controlled based on air pressure acquisition in the respective chambers such that pressure difference between the chambers is kept at a range of 600 to 600 Pa. The drying air application units comprise fans. The container is formed as a revolution container. Independent claims are also included for the following: (1) a device for drying a drying substance (2) a system for drying a drying substance.

Description

The invention relates to a method, an apparatus and a system for drying disposed in a container, the container in two chambers subdividing drying material using the drying material flowing through the drying air.

A drying of arranged in a container drying material using drying material flowing through the drying air is disclosed in the publication DE 100 27 728 A1 known. The drying material is located during drying on a arranged in the container gap or sieve bottom. Between the bearing on the nip or sieve bottom underside of the material to be dried and the container bottom, a first chamber is formed. In this first chamber heated drying air is introduced to dry the material to be dried. The drying air flows through the nip or sieve bottom and through the drying material arranged thereon upwards. After flowing through the material to be dried, the drying air exits at the top of the material to be dried and into a second chamber, which is bounded on the underside by the surface of the material to be dried and on the top side by a tarpaulin. The drying material thus divides the container into two chambers.

A disadvantage of such a drying of drying material is that only very irregular drying of the material to be dried can be achieved. In particular, the drying material on the side at which the drying air flows into the material to be dried, also referred to as the inflow side, is dried much more strongly than on the side at which the drying air flows out of the material to be dried, also referred to below as the outflow side. This is because the drying air continues to cool on its way through the drying material and is increasingly enriched with moisture, so less and less water to stimulate evaporation or absorb less and less moisture.

If the material to be dried has a certain degree of drying on its outflow side, a relatively long drying of the material to be dried is required, during which the material to be dried is dried on its inflow side to an extent which is not required. For this unnecessary, excessive drying of the material to be dried on the inflow side much energy is consumed, which is no longer available for drying the material to be dried on the outflow side. The conventionally required, relatively long drying of the material to be dried is thus very energy-intensive and ineffective. In addition, a drying device used for this purpose or a drying system used for this purpose is occupied for a relatively long time with a quantity of drying material to be dried and is thus available for the drying of further drying material only after a longer period of time. The drying device or the drying system can therefore be operated only very ineffective using the described conventional drying.

The object of the invention is to provide a novel type of drying arranged in a container to divide the container into two chambers Trocknungsgut using drying material flowing through the drying air, which is characterized compared to conventional drying methods by a very high efficiency and associated high cost efficiency ,

This object is achieved in a method of the type mentioned in the present invention that in a first drying step drying air from a first of the two chambers through the drying material in the second of the two chambers and in a subsequent second drying step drying air from the second chamber through the Trocknungsgut in the first chamber is guided.

By applying the drying material according to the invention with drying air from two sides, as can be seen directly from the above discussion of the prior art, the drying material is dried much more uniformly and faster than is the case with the described conventional drying. The drying method according to the invention is thus significantly more effective than conventional methods, in particular since a better drying result can be achieved with lower energy consumption.

In the context of the invention, the drying air can be heated before it is fed to one of the two chambers, or unheated ambient air is used as the drying air. Furthermore, the drying air may be a gas having a wide variety of compositions and / or may also have additives promoting drying.

As container come in the context of the invention of variously configured container shapes in question. In particular, the container may be a standardized container. The drying material can be brought in the container to the place where the drying is to be carried out. During drying, the material to be dried may remain in the container. After drying, the drying material by means of Containers are delivered to a destination. However, it is also possible for the container to be arranged at the location where the drying is to be carried out and to be filled there with drying material to be dried transported in another container. After drying, the dried material to be dried can be removed again from the container located at the drying location and transported away in another container.

The chambers formed by the arrangement of the material to be dried in the container can have a wide variety of shapes and volumes. In particular, they can differ in their shape with each other. The two chambers can be arranged side by side or one above the other. Also other relative arrangements in the form of mixtures of a juxtaposition and a superposition of the chambers are possible.

In the context of the invention, the material to be dried can be composed of a wide variety of materials, the drying of which can be carried out using drying air. For example, the material to be dried can be formed from various types of waste, green waste, wood chips, logs or the like.

According to an advantageous embodiment of the invention, an air pressure detection takes place in the first chamber and / or the second chamber, wherein means for Trocknungsluftbeaufschlagung of at least one of the two chambers are present, which are regulated in dependence on the result of the air pressure detection.

In practice it has been found that in conventional drying processes, in which drying air under pressure is pressed through the drying material in a single direction only, it often happens that the drying air seeks a path of the least resistance through the material to be dried. As a result, during the drying at least one of the two chambers fluidly interconnecting shaft formed in the Trocknungsgut through which passes a majority of the drying air from the inflow side to the outflow of the material to be dried, without bringing about a desired drying of the material to be dried off the well. Instead, the drying material is dried mainly in the vicinity of the shaft, so very uneven. In the presence of such a well a very long-lasting loading of the material to be dried with drying air is required for a sufficient drying of not located in the vicinity of the shaft portion of the drying material, if a desired drying of the material to be dried is still possible. This is associated with high energy consumption and very low efficiency of the conventional drying process.

If the air pressure is monitored in the chamber from which the drying air flows into the drying material to be dried, the formation of a shaft via the detection of an associated pressure loss in this chamber can be detected immediately. After detecting such a pressure loss, the means for supplying dry air to at least this chamber can be controlled so that the Trocknungsluftbeaufschlagung is reduced or completely adjusted. Subsequently, measures could be taken to distribute the material to be dried more evenly or to eliminate the at least one shaft.

In the chamber into which the drying air flows from the drying material, the air pressure can also be detected. For this purpose, this chamber must be closed to the environment of the container. If a sudden increase in the air pressure is detected in this chamber, it can also be concluded that the presence of a drying impairing shaft in the material to be dried and carried out as described above control the means for Trockenluftbeaufschlagung of at least lying on the inflow side of the drying chamber chamber.

A very precise control of the means for Trocknungsluftbeaufschlagung of at least one of the two chambers can be realized if the air pressure during drying in both chambers is detected simultaneously. This provides redundant information about the current drying process so that faults in the drying process can be identified clearly and reliably.

The means for supplying the drying air from at least one of the two chambers preferably have a fan with which drying air can be injected under a suitable pressure into the chamber from which the drying air flows during drying into the material to be dried. Particularly preferably, the blower is used during the blowing of the drying air into one of the two chambers at the same time for sucking the drying air flowing into the other chamber. This is particularly advantageous when using heated drying air, since the heat contained in it after drying is not simply blown off, but can be reused via the blower for further drying. It can be provided, which after drying with moisture laden drying air to withdraw this moisture at least partially again by suitable technical means, before the drying air is blown by means of the blower back into one of the two chambers.

Alternatively, it may be provided that the means for supplying dry air to at least one of the two chambers have a second fan with which the drying air flowing out of the material to be dried into one of the two chambers can be sucked out of this chamber. Again, it may be provided to supply the extracted from the second blower from this chamber drying air back to the drying, to avoid the associated with the blowing of heated drying air into the environment energy loss. Furthermore, it can also be provided here to at least partially remove the moisture contained in the drying air before re-blowing it into at least one of the two chambers.

Both of the aforementioned alternatives (one or two blowers) have the advantage that the flow of drying air can be varied very individually and specifically. According to the first alternative (a blower), throttle valves or similar regulating means for regulating the flow of the drying air may be present for this purpose. According to the second alternative (two blowers), an individual control of the two blowers can be carried out in order to be able to regulate the flow of the drying air individually. However, it is also possible here to use additionally flow control agents which are otherwise formed.

The variation of the dry air flow takes place in both alternatives, taking into account the detected in at least one of the two chambers air pressure by the means for Trockenluftbeaufschlagung of at least one of the two chambers depending on the result of the air pressure detection in at least one of the two chambers are regulated.

It has proven to be particularly advantageous if the difference between the air pressures prevailing in the two chambers during drying is kept very low. As a result, the formation of a drying-impairing shaft in the material to be dried can be reliably avoided.

In order to control the blower connected to the two chambers or the blowers connected to the two chambers in such a way that such a slight difference in air pressure is present during drying, it is necessary to detect and monitor the air pressure in both chambers and the blower (s) to regulate accordingly. It should be noted that the control of the fan in each case depends on the properties of the material to be dried, in particular its air permeability. For example, the drying air is to blow at a very dense Trocknungsgut under a higher pressure than in a less dense and thus more air-permeable material.

Have the means for Trocknungsluftbeaufschlagung of at least one of the two chambers of the container according to the above-mentioned second alternative, two fans, can also avoid in the lying on the outflow side of the drying chamber a small overpressure with respect to the in the Be created surrounding the container pressure prevailing, which may be advantageous, for example, in a relatively small air-permeable drying material. In this case, both chambers would thus be subjected to drying air.

According to a further advantageous embodiment of the invention, the means for Trocknungsluftbeaufschlagung of at least one of the two chambers are controlled such that the pressure difference between the prevailing in the two chambers pressures in a range from -600 Pa to +600 Pa is maintained. It has turned out that the formation of a drying-impairing shaft in the material to be dried can be reliably prevented by the choice of the difference in air pressure in this area, ie optimum process control is guaranteed. Preferably, the air pressure difference becomes in a range of -500 Pa to +500 Pa, in a range of -400 Pa to +400 Pa, in a range of -300 Pa to +300 Pa, in a range of -200 Pa to +200 Pa, in a range of -100 Pa to +100 Pa or in a range of -50 Pa to +50 Pa. It has been shown that the effectiveness of the drying increases with decreasing air pressure difference equal to zero continues to increase.

A further advantageous embodiment of the invention provides that at least the first drying step is repeated after the second drying step. How often individual drying steps are repeated successively depends, inter alia, on which air permeability the particular drying material to be dried has and how long the respective application of the material to be dried with the drying air takes place from one side. In this case, short-term exposures with repeatedly repeated drying steps are just as possible as a single implementation of the first and second Drying step and any intermediate alternative.

The above object is further achieved in a device of the type mentioned in the present invention, that the device for performing the method according to one of the above embodiments or any combination thereof is set up. This is associated with the advantages mentioned above with respect to the method.

According to an advantageous embodiment of the device according to the invention, the container is provided on its upper side with a container opening and a partially air permeable formed above the container bottom, parallel and spaced from the container bottom separating tray on which the Trocknungsgut can be arranged, wherein one of the two chambers on top the separation bottom and the bottom side is limited by the container bottom, wherein the device has a cover which is airtight connected to the edge of the container opening and the one above the separating bottom second chamber bounded on the upper side, wherein the first chamber and the second chamber with the means for Trocknungsluftbeaufschlagung of at least one of the two chambers are connectable. By means of the cover, the upper chamber can thus be hermetically sealed with respect to the surroundings of the container in order to be able to realize the method according to the invention in a simple manner. The cover may be rigid or formed of a flexible material. Also, combinations of rigid and flexible sections are possible. The connection between the edge of the container opening and the cover can be done with the interposition of additional sealant. In order to achieve a sufficient tightness of the connection between the edge of the container opening and the cover, for example, suitable clamping or pressing means may be present, or a sufficient contact pressure is generated solely by the force acting on the cover weight, which is designed accordingly.

According to a further advantageous embodiment of the device according to the invention, the device has an actuating device, by means of which the cover can be brought into the airtight contact with the edge of the container opening. As a result, the cover can be remotely controlled, for example, in order to minimize the personnel expenditure for handling the cover or the device. The cover can also be brought out of contact with the edge of the container opening by means of the actuating device. Alternatively, however, it may be provided to handle the cover manually and to connect airtight with the container or to remove it from the container.

According to a further advantageous embodiment of the device according to the invention, the device has an airtight sealable drying chamber, in which the container can be arranged, wherein in the side walls of the container in the region between the separating tray and the container bottom at least one air passage opening is formed, wherein the drying chamber via a first Opening in its wall with the means for Trocknungsluftbeaufschlagung of at least one of the two chambers is connectable, wherein the edge of the container opening by means of the cover airtight with a second opening in the wall of the drying chamber is connectable, which also with the means for Trocknungsluftbeaufschlagung of at least one of two chambers is connectable. After that, the cover can be installed in the drying chamber, for example on the ceiling of the drying chamber, and if necessary operated manually or by means of the actuating device. In particular, it may be provided that the cover or at least a part thereof can be lowered from the ceiling of the drying chamber to be airtight connected to the edge of the container opening. To dry the material to be dried, the drying air is first blown into the drying chamber according to this embodiment of the invention, from where it passes through the at least one air passage opening in the lower chamber of the container. From there, the drying air flows through the material to be dried in the upper chamber of the container and from there via the cover and the second opening in the wall of the drying chamber, which is preferably formed on the ceiling of the drying chamber, again the means for Trocknungsluftbeaufschlagung of at least one of the two chambers supplied or sucked off by these. The drying air thus removed from the upper chamber can either be blown off into the environment of the drying chamber by means of the means for applying the drying air to at least one of the two chambers or reused for further drying. The more air passage openings are arranged in the side walls of the container, the more uniformly the drying air can flow into the lower chamber in order to bring about as uniform as possible drying of the material to be dried. Such a uniform introduction of the drying air into the lower chamber of the container also provides further protection against the formation of a drying impairing shaft in the Trocknungsgut, which is known in the prior art introduction of drying air at only one particular point of the lower chamber the container is not possible.

According to a further advantageous embodiment of the device according to the invention, the container is a standardized roll-off container into which the separating tray and the at least one air passage opening are subsequently inserted. A standardized roll-off container allows easy transport to and from the drying material to be dried, in particular to the drying chamber or away from it. Roll-off containers are available without much effort. To realize the invention, no elaborately designed and therefore expensive special containers are required.

According to a further advantageous embodiment of the device according to the invention at least one guide device is arranged on the bottom of the drying chamber, via which the roll-off container can be guided in its introduction into the drying chamber in an optimal drying position. The bottom of the drying chamber may be formed by the ground or by a chamber bottom disposed thereon. By means of the guide device, it is preferably possible to settle a roll-off container in the usual manner from a truck and bring it into the drying chamber. There are thus no further machinery or measures required to bring the container in its optimum drying position. The same applies to the removal of the roll-off container from the drying chamber and its removal. The guide device may, for example, have one or more guide rails.

The above object is further achieved in a system of the type mentioned in the present invention, that the system comprises at least one device according to one of the embodiments described above or any combination thereof and means for Trocknungsluftbeaufschlagung of at least one of the two chambers of the container of the device the system for implementing the method according to one of the embodiments described above or any combination thereof is set up. This is associated with the advantages mentioned above with respect to the method and the device.

According to an advantageous embodiment of the system according to the invention, the means for Trocknungsluftbeaufschlagung of at least one of the two chambers of the container of the device, an electronic control and regulating device, at least one associated, arranged in one of the two chambers pressure sensor, an air supply and an air discharge on the air supply and the air discharge via the electronic control and regulating device are selectively connectable in alternation with the two chambers. The air supply and the air discharge each have at least one fan or are connected to a single blower. By means of the control and regulating device, the blower or the two fans can be controlled and regulated such that the difference between the prevailing in the two chambers of the container air pressures is low, in particular in the range specified above.

Further advantages and features will be explained in more detail below with reference to the embodiments of the invention shown in the accompanying figures. Show

1 : a schematic representation of a first embodiment of the device according to the invention,

2 a schematic representation of a second embodiment of the inventive device, and

3 : a schematic representation of an embodiment of the system according to the invention.

1 schematically shows a first embodiment of the device according to the invention 1 , The device 1 includes a container 2 , which is designed as a conventional roll-off container.

In the container 2 is an air-permeable separating floor 3 arranged, which is parallel and spaced from the container bottom 4 is aligned. On the dividing floor 3 stores a drying material to be dried 5 , being between the bottom 6 of the drying material 5 and the container bottom 4 a first chamber 7 of the container 2 is arranged.

The container 2 has a container opening on top, which with a cover 8th airtight to the environment of the container 2 is completed. The cover 8th is designed as a rigid plate. It is about the two actuators 9 and 10 an actuator vertically relative to the container 2 movable according to the arrow P to be brought in and out of contact with the edge of the container opening. Between the cover 8th and the surface 11 of the drying material 5 is a second chamber 12 of the container 2 arranged.

The lower chamber 7 is with a pipeline 13 non-illustrated means for Trocknungsluftbeaufschlagung of at least one of the two chambers 7 and 12 connected. The cover 8th is with a pipeline 14 from the means not shown for Trocknungsluftbeaufschlagung of at least one of the two chambers 7 and 12 connected.

In 1 a drying step of the inventive method is shown in the drying air according to the arrows on the lower pipe 13 into the lower chamber 7 is blown, from there through the Trocknungsgut 5 flows upwards and so into the upper chamber 12 from where the drying air passes through the pipeline 14 is dissipated. In a subsequent drying step, the flow of drying air indicated by the arrows is reversed in order to dry the drying material according to the invention 5 bring about.

The device 1 further comprises two guide rails forming a guide device 15 on, of which in 1 only one can be seen. The guide rails 15 are over supports 16 spaced from the ground 17 arranged. This favors the shown arrangement of the lower pipe 13 below the container 2 and the guide rails 15 , The guide rails 15 have bends at their ends shown on the left 18 up to those at the bottom of the container 4 arranged roles 19 on the guide rails 15 can roll so that the container 2 the optimal drying position can take. Between the guide rails 15 is a support in the end region shown on the right 20 arranged on which the container bottom 4 at the occupied drying position rests.

2 schematically shows a second embodiment of the device according to the invention 1 , Substantial difference to the in 1 shown embodiment is that the container 2 during the drying of the material to be dried 5 in an airtight sealed to the environment drying chamber 21 located. For inserting and removing the container 2 in the drying chamber 21 or out of this, the drying chamber on the left side shown an airtight sealable gate 22 on.

The drying chamber 21 is over a first opening 27 in the wall of the drying chamber 21 and the pipeline 13 to means for Trocknungsluftbeaufschlagung of at least one of the two chambers 7 and 12 of the container 2 connected. The cover 8th is vertically movable on the ceiling 23 the drying chamber 21 arranged, which is not shown in detail. The cover 8th is at the edge of an apron 24 made of flexible material with the ceiling 23 connected, with the apron 24 the upper chamber 12 and the over the cover 8th arranged room 25 airtight from the rest around the container 2 in the drying chamber 21 arranged room 31 separates. In the wall of the drying chamber 21 , here the ceiling 23 , is a second opening 26 arranged at the top of the pipeline 14 the means for Trockenluftbeaufschlagung of at least one of the two chambers 7 or 12 is arranged.

According to 2 is used to dry the material to be dried 5 Drying air over the pipeline 13 and the first opening 27 in the wall of the drying chamber 21 in the drying chamber 21 blown. The in the drying chamber 21 injected drying air passes through the air outlet openings 28 in the side walls of the container 2 into the lower chamber 7 , from where the drying air through the drying material 5 in the upper chamber 12 flows. From here, the drying air enters the chamber 25 and from there on the second opening 26 in the wall of the container 2 and the upper pipe 14 dissipated.

The bottom of the drying chamber 21 gets through the surface of the soil 17 educated. On the ground 17 are guide rails 15 arranged at their right end each with an angled portion 18 are provided to a desired positively guided positioning of the container 2 in the drying chamber 21 to be able to make. Between the guide rails 15 on the left is a support 20 arranged on which the container bottom 4 rests when the container 2 is in its optimum drying position.

Instead of the apron 24 can also be provided, the cover 8th via a flexible hose or the like with the second opening 26 or the upper pipe 14 to connect to the chamber 12 opposite the rest between the container 2 and the walls of the drying chamber 21 arranged room 31 Airtight seal.

3 schematically shows an embodiment of the system according to the invention 29 , The system 29 includes a device 1 , which correspond to the in 2 embodiment shown is configured. Furthermore, the system comprises a container 30 in which a control and regulating device, not shown, and the above-controlled means for supplying drying air to at least one of the two chambers 7 or 12 of the container 2 are arranged. The container 30 is over the piping 13 and 14 fluidically with the device 1 connected. The container 30 may be a conventional, standardized container. It is also possible to have more than one device 1 with the container 30 to connect to a drying in several containers 2 to be able to carry out simultaneously or alternately.

In 3 a drying step is shown, which should be indicated by the arrows and substantially the in 2 Shown corresponds.

The embodiments described with reference to the figures are illustrative and not restrictive.

LIST OF REFERENCE NUMBERS

1

 contraption

2

 container

3

 separating base

4

 container bottom

5

 be dried

6

 Bottom of the material to be dried

7

 chamber

8th

 cover

9

 actuator

10

 actuator

11

 Surface of the material to be dried

12

 chamber

13

 pipeline

14

 pipeline

15

 guide rail

16

 support

17

 ground

18

 angling

19

 role

20

 In stock

21

 drying chamber

22

 gate

23

 blanket

24

 apron

25

 room

26

 second opening

27

 first opening

28

 Air passage opening

29

 system

30

 Container

31

 room

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10027728 A1 [0002]

Claims (12)

Method for drying in a container ( 2 ), the container ( 2 ) in two chambers ( 7 . 12 ) subdividing the drying material ( 5 ) using the material to be dried ( 5 ) through flowing drying air, characterized in that in a first drying step drying air from a first of the two chambers ( 7 . 12 ) through the drying material ( 5 ) into the second of the two chambers ( 7 . 12 ) and in a subsequent second drying step drying air from the second chamber ( 7 . 12 ) through the drying material ( 5 ) into the first chamber ( 7 . 12 ) to be led. Method according to claim 1, characterized in that in the first chamber ( 7 . 12 ) and / or the second chamber ( 7 . 12 an air pressure detection takes place, wherein means for the supply of drying air to at least one of the two chambers ( 7 . 12 ), which are regulated depending on the result of the air pressure detection. A method according to claim 2, characterized in that the means for Trocknungsluftbeaufschlagung of at least one of the two chambers ( 7 . 12 ) are regulated so that the pressure difference between the respective in the two chambers ( 7 . 12 ) is maintained during drying in a range of -600 Pa to +600 Pa. Method according to one of the preceding claims, characterized in that after the second drying step at least the first drying step is repeated. Contraption ( 1 ) for drying in a container ( 2 ), the container ( 2 ) in two chambers ( 7 . 12 ) subdividing the drying material ( 5 ) using the material to be dried ( 5 ) passing through drying air, characterized in that the device ( 1 ) is arranged to carry out the method according to one of the preceding claims. Contraption ( 1 ) according to claim 5, characterized in that the container ( 2 ) on its upper side with a container opening and with a partially permeable to air, above the container bottom ( 4 ), parallel and spaced from the container bottom ( 4 ) arranged separating tray ( 3 ), on which the material to be dried ( 5 ), one of the two chambers ( 7 ) on the upper side by the separating bottom ( 3 ) and underside through the container bottom ( 4 ), the device ( 1 ) a cover ( 8th ), which is airtight connected to the edge of the container opening and the one above the separating bottom ( 3 ) second chamber ( 12 ) on the upper side, the first chamber ( 7 ) and the second chamber ( 12 ) with the means for supplying dry air to at least one of the two chambers ( 7 . 12 ) are connectable. Contraption ( 1 ) according to claim 6, characterized by an actuating device, by means of which the cover ( 8th ) can be brought into the airtight contact with the edge of the container opening. Contraption ( 1 ) according to claim 6 or 7, characterized by an airtight sealable drying chamber ( 21 ), in which the container ( 2 ) is arranged, wherein in the side walls of the container ( 2 ) in the area between the separating floor ( 3 ) and the container bottom ( 4 ) at least one air passage opening ( 28 ), wherein the drying chamber ( 21 ) via a first opening ( 27 ) in its wall with the means for Trocknungsluftbeaufschlagung of at least one of the two chambers ( 7 . 12 ) is connectable, wherein the edge of the container opening by means of the cover ( 8th ) airtight with a second opening ( 26 ) in the wall of the drying chamber ( 21 ), which can also be connected to the means for supplying dry air to at least one of the two chambers ( 7 . 12 ) is connectable. Contraption ( 1 ) according to claim 8, characterized in that it is in the container ( 2 ) is a standardized roll-off container into which the separating bottom ( 3 ) and the at least one air passage opening ( 28 ) are inserted. Contraption ( 1 ) according to claim 9, characterized in that on the bottom of the drying chamber ( 21 ) at least one guide device is arranged, via which the roll-off container when introduced into the drying chamber ( 21 ) is feasible in an optimal drying position. System ( 29 ) for drying in a container ( 2 ), the container ( 2 ) in two chambers ( 7 . 12 ) subdividing the drying material ( 5 ) using the material to be dried ( 5 ) through flowing drying air, characterized by at least one device ( 1 ) according to any one of claims 5 to 10 and means for supplying dry air to at least one of the two chambers ( 7 . 12 ) of the container ( 2 ) of the device ( 1 ), whereby the system ( 29 ) is arranged to carry out the method according to one of claims 1 to 4. System ( 29 ) according to claim 11, characterized in that the means for supplying drying air to at least one of the two chambers ( 7 . 12 ) of the container ( 2 ) of the device ( 1 ) an electronic control and regulating device, at least one associated, in one of the two chambers ( 7 . 12 ) arranged pressure sensor, have an air supply and an air discharge, wherein the air supply and the air discharge via the electronic control and regulating device alternately with the two chambers ( 7 . 12 ) are connectable.

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