DE29814380U1 - Device for drying sludge and / or liquids contaminated by the ingredients - Google Patents

Description

Device for drying sludge and/or the contents of contaminated liquids

The invention relates to a device for drying sludge and/or liquids contaminated by their ingredients with the aid of solar radiation within a substantially closed drying chamber with a casing or cover that is at least partially transparent, wherein the material to be dried is circulated.

Such a device is already known from DE 43 15 321 C2. The drying room is formed by a building in which the material to be dried is transported and turned or circulated. This means that this known device is only economical if correspondingly large quantities of sludge and/or contaminated liquid are generated and must be subjected to a drying process.

The invention is therefore based on the object of creating a device of the type mentioned at the outset which can also be used economically when only relatively small quantities of, for example, a few tons of sludge or contaminated liquid 0 are produced and are to be dried.

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To achieve this object, the device mentioned at the outset is characterized in that the drying space is formed by a container which is open at the top and can be transported by means of a transport vehicle, and a transparent cover arranged over the open top of this container.

This results in a relatively small drying room, in which even relatively small amounts of sludge or contaminated liquid can be collected and dried. The drying energy is easily supplied through the transparent cover in the form of solar energy, so that the energy consumption

&psgr; a correspondingly economical drying takes place. The goods to be dried or the dried goods can be conveniently transported using the container forming the drying room, i.e. on the one hand they can be collected at the place where they are produced and on the other hand they can be taken for further processing or to a landfill after drying. It is even conceivable to carry out the drying process in whole or in part during transport.

A device according to the invention for solving the problem can be created particularly economically if the container serving as the drying space is a commercially available trough-shaped container, in particular

™ with attack fittings for a lifting device or a change device arranged on the transport vehicle for the container. Such containers and container vehicles are already common, for example, in the construction industry and/or for waste disposal, so that only a small amount of additional equipment is required to create the drying room according to the invention and thus the device 0 according to the invention, since existing containers and transport vehicles suitable for them can be used.

It was already mentioned at the beginning that the material to be dried is circulated during the drying process. This is also already known 5 and serves to complete the drying process in a reasonable time.

to be able to carry out. To circulate the material to be dried, at least one turning device with turning blades can be provided which, in the position of use, engages in the container serving as the drying space. Such turning devices are known in many different forms and correspond, for example, to mixing devices for building material mixtures, such as those used to mix mortar or plaster or concrete. Furthermore, stirring devices for circulating pasty or sludge-like materials are also known from other branches of industry and could be used as a turning device on the device according to the invention.

&psgr; It is expedient if the turning device is arranged or attached to the container, in particular to its upper edge which delimits the open top, in an adjustable manner, or at least adjustable in height. This allows the contents of the container to be easily reached and turned over for drying.

A further embodiment of the device can provide that the turning device or turning tool can be moved back and forth transversely to the orientation of a horizontal, vertical or oblique axis of rotation having 0 turning blades, for example on the edge of the container or on rails or guides arranged there, which may be height-adjustable. Thus, the

" The contents of the container can be grasped and circulated practically anywhere with the help of the turning device, even if the turning device can initially only act on a part of the container and its contents. By adjusting the height on the one hand and back and forth on the other, the contents of the container can be grasped and circulated to such an extent that efficient and rapid drying can take place.

The circulation of the material to be dried can be improved by the turning tools or blades of the turning device being effective in conveying and circulating in the direction of orientation of their axis of rotation 5 and the turning device or the turning device being

During operation, the turning device remains in one place in the container and preferably extends in the direction of the larger or largest dimension of the container. This means that such a turning device does not have to be adjusted itself because it moves the pasty, slurry or liquid material to be dried and can therefore essentially completely circulate it.

However, a combination is of course also possible in which such a conveying turning device is additionally adjusted so that its conveying movement and its own adjustment movement can be superimposed on one another.

Especially in the case where the turning device is to remain stationary, it is advantageous if two or even three such turning devices are arranged distributed over the volume of the container, the effective areas of which can touch one another or, if appropriate, even overlap.

The turning device(s) can have access points or the like for the changeover device or the loading device of the transport vehicle and/or for a lifting device and can be lifted out of the container. Once the contents of the container have dried, the turning device(s) can be easily removed from the container.

" way and then transported with this container to a location 5 for further processing or landfill. The

Emptying the container, whether at the drying location or at a remote location, is facilitated by the fact that the turning device(s) can be lifted out of the container after the drying process.
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Since the container or a container serving as such is and must be liquid-tight, the moisture that arises during drying is expediently removed through the air. The drying space 5 formed by the container and cover or hood can therefore have at least one ventilation opening on the

Container itself, on the cover and/or at the transition between container and cover, whereby the latter alternative can be most easily fulfilled by the hood-shaped cover having a gap at least in some areas at its lower edge in the position of use from the upper edge of the container. It is particularly advantageous for effective drying and at the same time protection from rain if the plane spanned by the lower edge of the cover is arranged higher than the plane formed by the upper edge of the container. This then results in a correspondingly large gap-shaped opening between the edges of the cover and the container, so that a corresponding amount of

&psgr; drying air can flow through the drying room.

Further embodiments, in particular the cover hood and its curved or roof-shaped design, are the subject of claims 11 to 13. These embodiments serve primarily to provide good coverage, even against precipitation, or, above all, to provide a large-area supply of solar energy while at the same time sufficiently sealing off the drying space to allow the supplied heat energy to take effect therein, and also to provide good ventilation of the goods to be dried.

So that the device according to the invention can be used independently at any location, a particularly useful embodiment can provide that a photovoltaic system is provided as a power source for the electrical drive of the turning device(s) and/or the fan(s). Since the principle of the device is based primarily on the use of solar energy for the drying process, solar energy can also be used to generate electricity for power consumers that are conveniently provided on the device. The device according to the invention is thus practically independent of any installations, particularly electrical ones.

5 Although the device could also be used during transport

can be made, but it is more practical to use them stationary. The hood-shaped cover can be attached to the container and can be removed, especially for transport. In this case, no consideration needs to be given to the road traffic regulations with regard to the dimensions of the cover. In addition, the cover can be constructed accordingly lighter, since it is not exposed to any wind.

In such a case, it is useful if the hood-shaped cover has downward-facing supports from its lower edge

or similar supports which fit it onto the container - especially into pockets, receptacles or similar arranged on the outside. This facilitates the insertion or removal of the hood-shaped cover, so that the device can be prepared very quickly for the drying process on the one hand and for transport on the other.

A further embodiment of the invention can consist in providing an additional heater for insertion into the container or in the bottom of the container. This allows the drying process to be

take place or continue in bad weather and/or at night. The term additional heating refers to a heating system that is operated with external energy and that can be provided in addition to the transparent cover for the supply of solar energy. It could be operated by the drive or battery of the transport vehicle or also by an external power source or with the help of a motor-generator unit.

In particular, when combining one or more of the features and measures described above, a device for drying pasty goods, in particular sludge, is obtained which is very inexpensive and effective even with relatively small quantities of goods to be dried, whereby this drying device can advantageously also be used to transport this goods both before and after drying. It can

• *

This means you can easily change your location and you are not tied to a specific location.

Examples of embodiments of the invention are described in more detail below with reference to the drawing. It shows, in a partly highly schematic representation:

Fig.l is a partially cutaway side view of a device for drying sludge with a trough-shaped

container or container for collecting the sludge,

&psgr; an engaging turning device with turning blades

for turning over the goods to be dried and a transparent cover arranged at a certain distance above it, whereby the turning device has a

and movable chassis and is itself height adjustable,

Fig. 2 shows a modified embodiment compared to Fig. 1 - with the cover hood lifted off - in which a

rail above the container is provided with a movable turning device,

" Fig.3 is a partially sectioned front view of a

5 Device according to Fig.l or 2, wherein a

modified turning device with adjustable height and its turning blades positioned above the material to be dried and can be adjusted lower in the position of use,
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Fig.3a is a schematic representation of a turning device as used in the device according to Fig.3,

Fig.3b is a diagrammatic view of a transparent cover

5 be before attaching it to a container or after

8th
Removing it, for example for transport,

Fig.4 is a side view of a transport vehicle with a container or receptacle changing device formed by pivoting lifting arms, wherein the device

The trough-shaped container belonging to the transport vehicle is loaded onto it and is in the transport position,

Fig.5 is a frontal view or cross-section of the device and the associated

Container with a turning device adjustable in transverse direction and height W and

Fig. 6 is a representation of a device corresponding to Figures 3 and 5, in which several turning devices are arranged in longitudinal

direction are arranged parallel to one another, with their effective areas roughly touching or partially overlapping.

In the following description of several embodiments of a device for drying sludge 2, designated as a whole by 1, parts or

* Assign identical reference numbers to objects even if they differ in their construction or appearance.

In all embodiments, the mentioned device 1 for drying sludge or ingredients of contaminated liquids with the aid of solar radiation has a substantially closed drying chamber 3 and a transparent cover 4, wherein the material 2 to be dried is circulated within the drying chamber 3 in a manner to be described below.

In all embodiments, the drying chamber 3 is separated by a

by means of a transport vehicle 5 (Fig.4), open-topped container 6 and a transparent cover 4 arranged over the open top of this container 6. This can be clearly seen in Figures 3, 5 and 6. This results in a relatively small drying room in which even small quantities of goods 2 to be dried can be dried economically, in particular with solar heat. The container holding the goods 2 can advantageously be transported with a transport vehicle 5, so that drying can be carried out at almost any location and the dried goods can also be easily sent for further processing or disposal.

) can be.

In Fig.1, 2 and 4 it is indicated that the container 6 serving as drying room 3 can be a commercially available trough-shaped container that is open at the top, in particular with attack fittings for a lifting device or a changing device 7 arranged on the transport vehicle 5 for the container 6. In the exemplary embodiment, the changing device is formed by pivotable arms 7a and pulling elements 7b extending therefrom, which engage on the one hand on the arms 7a and on the other hand on the container 6 or container, so that the pivoting of the arms 7a leads to the container 6 shown in Fig.4 on the transport vehicle 5 being pushed behind the loading area.

w of this vehicle 5 and can be set down, from which position 5 it can also be loaded again in the known manner. Since such trough-shaped containers are available in large numbers, the device 1 can be manufactured very inexpensively and simply. It has already been mentioned that the material to be dried or the sludge 2 is circulated during drying. Accordingly, in all embodiments the device 1 has at least one turning device with turning blades 9 which, in the use position, engages in the container 6 and is designated as a whole by 8, and which, in the working position, dips into the material 2 to be dried at least with the downward-pointing turning blades 9, so that this material is circulated by rotation of the turning device 8.

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In Fig.1, 2 and 5 it is indicated that the turning device 8 is arranged or attached to the container 6 in the area of its edge 6a which delimits the open top so as to be adjustable, namely adjustable back and forth and also adjustable in height. Fig.6, on the other hand, shows a device 1 with several, namely three turning devices 8, whose axes of rotation are arranged approximately parallel to one another, although height-adjustable turning devices 8 could also be provided here.

In Fig.l, 2 and 5, the turning device provided there is transverse to the orientation of its turning blades 9 having horizontal

P axis of rotation can be moved back and forth, which is indicated by the arrows PfI and Pf2. The turning device according to Fig. 1 can be moved or moved by means of a chassis directly on the edge 6a of the container 6. Fig. 2, on the other hand, indicates a possibility in which a turning device 8 can be moved or moved on rails 10 or guides arranged in the area of the edge 6a - somewhat higher - and which can be adjusted in height if necessary.

0 The height adjustment of the turning device 8 indicated by the double arrow Pf3 takes place in Fig.l relative to the chassis, while in the embodiment according to Fig.2 it can be achieved by the height adjustment of the rails 10.

In Fig. 5, a rail 10 is indicated which runs transversely to the longitudinal extension of the container, on which the turning device 8 can also be moved back and forth, while the rail 10 itself is height-adjustable according to the double arrow Pf3. It would also be conceivable that the entire rail 10 could also be adjusted perpendicular to the plane of the drawing or in the longitudinal direction of the container, or that several

such rails 10 are arranged distributed over the length of the container. The length of the container is understood to be the dimension that extends in the direction of travel during transport according to Fig.4.
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I »·

·

The circulation process can be promoted and improved by the turning tools or blades 9 of the turning device(s) 8 having a conveying and circulating effect in the direction of orientation of the respective axis of rotation, which also opens up the possibility of fixing the turning device(s) 5 or 8 at one point on the container 6 and leaving them there during operation, as is indicated in Fig. 6 - but there for three turning devices 8 at the same time. It is advantageous if such a turning device 8 then extends in the direction of the larger or largest dimension of the container 6, for example in the transport position in the direction of travel.

) While in the embodiments according to Fig. 1, 2 and 5 one turning device 8 can be seen each time, Fig. 6 shows several turning devices 8 whose effective areas touch or overlap, the axes of rotation being arranged parallel to one another and extending in the direction that corresponds to the direction of travel during transport with the vehicle 5. This also makes it possible to achieve good circulation of the material 2 to be dried, particularly with appropriate shaping of the turning blades 9.

For good and effective drying, it is important to replace the moist air with fresh or dry air. The air gap formed by container 6 and cover 4 or cover hood

The drying chamber 3 therefore has ventilation openings which could be arranged on the container or on the cover 4, but in the embodiments are arranged in a practical and advantageous manner at the transition between the container 6 and the cover 4. It is clear from Fig. 1 in particular, but also from Figures 3, 5 and 6, that the hood-shaped cover 4 has a distance 0 at its lower edge 4a in the position of use from the upper edge 6a of the container 6, whereby according to Fig. 1 the plane spanned by the lower edge 4a of the cover 4 is arranged higher than the plane formed by the upper edge 6a of the container 6. Since the hood-shaped cover 4 with its lower edge 4a according to Figures 3, 5 and 6 touches the side walls of the

container 6 protrudes laterally, these edges can also lie approximately in the same plane or the edges 4a could even be arranged lower than the edges 6a.

The cover 4 can extend over the container not only laterally but also longitudinally, in particular on both sides, as shown in Fig. 1, so that it simultaneously provides protection against precipitation.

In all embodiments and in particular according to Fig.3b, the curved cover 4 is curved in only one direction and runs t

at right angles to it it is essentially straight, and in the example is therefore designed with an approximately arched cross-section over its entire length. Instead it could also be shaped like a roof. In all these cases and also with a roof-shaped shape it is open at the front, as can be seen particularly well in Fig.3b, which enables good ventilation of the drying room 3, especially in the longitudinal direction.

Within the curved - or possibly roof-shaped - cover hood or cover 4, a fan can be provided as shown in Fig. 3, 5 and 6, and several fans 11 can be provided as shown in Fig. 1, in order to generate or support an air flow through the drying chamber 3 and in particular to direct it onto the material to be dried. In this way, the air moistened by the drying process can be exchanged constantly or from time to time within the drying chamber 3, so that the heating by the sunlight leads to effective and rapid drying.

A photovoltaic system (not shown in detail in the drawing) can be provided as the power source for the electrical drive of the turning device(s) 8 and the 0 or the fans 11, whereby the entire device 1 becomes independent of predetermined installations. It can then be used at any location and in particular directly where such sludge occurs 5 and where there may be no power connection.

11 08-98

According to Fig.3 and the other embodiments, the hood-shaped cover 4 can be detachably attached to the container 6 and can be removed in particular for transporting it. In the embodiments, it is provided that the hood-shaped cover 4 has supports 12 or carriers pointing downwards from its lower edge 4a, which fit into pockets, receptacles 13, sleeves or other fastening devices arranged on the container 6 - in particular on the outside. This represents a simple and effective, but easily detachable connection between the container 6 and the cover 4. In Fig.4, the container 6 is loaded onto a vehicle 5 without the cover 4.

It should also be mentioned that an additional heater, not shown in detail in the figures, can be provided for insertion into the container or installed in the bottom of the container in order to be able to continue or carry out the drying process even if there is insufficient solar radiation and solar heat available due to weather conditions.

Overall, a device 1 is obtained with which the solar radiation, which is available practically free of charge, can be effectively used to dry even small amounts of sludge, whereby the device 1 is itself inexpensive because the container 6 forming the essential part of the device 1 is a commercially available

" container. This not only has the advantage that the device 1 can be manufactured inexpensively based on such commercially available containers, but also that the transport of the sludge or the dried material is correspondingly simple.

The device 1 is used to dry sludge 2 or the ingredients of contaminated liquids using solar radiation and has a substantially closed but ventilated drying room 3 with a transparent cover 4 that lets solar radiation through but retains the heat generated inside so that drying can be carried out using this heat. The material 2 to be dried is thereby

Turning devices 8, which can also be constructed like mixing devices for building materials, are circulated, whereby the axis of rotation of these turning devices 8 can be arranged horizontally, diagonally or vertically. The drying room 3 is formed by a container 6 that is open at the top and can be transported by means of a transport vehicle 5, for example a trough-shaped commercially available container, and the transparent cover 4 arranged above it, so that even smaller quantities of sludge 2 can be dried economically.
10

Expectations

Claims (17)

1. Device ( 1 ) for drying sludge ( 2 ) and/or liquids contaminated by the ingredients with the aid of solar radiation within a substantially closed drying chamber ( 3 ) with a casing or cover ( 4 ) that is at least partially transparent, wherein the material to be dried ( 2 ) is circulated, characterized in that the drying chamber ( 3 ) is formed by a container ( 6 ) that is open at the top and can be transported by means of a transport vehicle ( 5 ), and a transparent cover ( 4 ) arranged over the open top of this container ( 6 ). 2. Device according to claim 1, characterized in that the container ( 6 ) serving as the drying space ( 3 ) is a commercially available trough-shaped container, in particular with attack fittings for a lifting device or a changing device ( 7 ) arranged on the transport vehicle ( 5 ) for the container ( 6 ). 3. Device according to claim 1 or 2, characterized in that for circulating the material to be dried, at least one turning device ( 8 ) with turning blades ( 9 ) is provided which engages in the container ( 6 ) in the position of use. 4. Device according to one of claims 1 to 3, characterized in that the turning device is adjustably arranged or fastened to the container ( 6 ), in particular to its upper edge delimiting the open upper side, at least so as to be adjustable in height. 5. Device according to one of claims 1 to 4, characterized in that the turning device ( 8 ) can be moved back and forth transversely to the orientation of a horizontal, vertical or oblique axis of rotation having turning blades ( 9 ), for example on the edge ( 6a ) of the container ( 6 ) or on rails ( 10 ) or guides arranged there, which may be height-adjustable. 6. Device according to one of claims 1 to 5, characterized in that the turning tools or blades ( 9 ) of the turning device ( 8 ) are effective in conveying and circulating in the orientation direction of their axis of rotation and the turning device ( 8 ) remains in particular at one point of the container ( 6 ) during operation and preferably extends in the direction of the larger or the largest extent of the container ( 6 ). 7. Device according to one of claims 1 to 6, characterized in that several turning devices ( 8 ) are provided, the effective areas of which touch or overlap. 8. Device according to one of claims 1 to 7, characterized in that the turning device ( 8 ) has engagement points or the like for the changing device ( 7 ) or the loading device of the transport vehicle and/or for a lifting device and can be lifted out of the container. 9. Device according to one of claims 1 to 8, characterized in that the drying space ( 3 ) formed by the container ( 6 ) and cover ( 4 ) or covering hood has at least one ventilation and/or venting opening on the container itself, on the cover and/or at the transition between the container ( 6 ) and cover ( 4 ). 10. Device according to claim 9, characterized in that the hood-shaped cover ( 4 ) has a distance at its lower edge ( 4a ) in the position of use from the upper edge ( 6a ) of the container ( 6 ) at least in some areas, in particular the plane spanned by the lower edge ( 4a ) of the cover ( 4 ) is arranged higher than the plane formed by the upper edge ( 6a ) of the container ( 6 ). 11. Device according to one of claims 1 to 10, characterized in that the cover ( 4 ) projects beyond the container ( 6 ) at least in one direction, in particular in the direction of the larger dimension thereof. 12. Device according to one of claims 1 to 11, characterized in that at least one fan ( 11 ), preferably several fans, are provided within the particularly curved or roof-shaped cover ( 4 ) for generating a flow of air through the drying space ( 3 ) and in particular directed at the material to be dried. 13. Device according to one of claims 1 to 12, characterized in that the covering hood ( 4 ) is roof-shaped or curved in one direction with a ridge and runs substantially straight at a right angle thereto and is open at the end or ends. 14. Device according to one of claims 1 to 13, characterized in that a photovoltaic system is provided as a power source for the electrical drive of the turning device ( 8 ) and/or the fan(s) ( 11 ). 15. Device according to one of claims 1 to .14, characterized in that the hood-shaped cover ( 4 ) is detachably attached to the container ( 6 ) and is removable in particular for its transport. 16. Device according to claim 15, characterized in that the hood-shaped cover ( 4 ) has supports ( 12 ) or similar supports directed downwards from its lower edge ( 4a ), which fit into pockets, receptacles ( 13 ) or similar arranged on the container - in particular on the outside. 17. Device according to one of the preceding claims, characterized in that an additional heater is provided for insertion into the container ( 6 ) or in the bottom of the container ( 6 ).