CA2295246A1

CA2295246A1 - Arrangement for dispensing a binding agent and cleaning device

Info

Publication number: CA2295246A1
Application number: CA 2295246
Authority: CA
Inventors: Bernhard Helmut Lehner; Manfred Anton Lehner
Original assignee: LEHNER AGRAR GMBH
Current assignee: LEHNER AGRAR GmbH
Priority date: 1999-01-12
Filing date: 2000-01-11
Publication date: 2000-07-12
Also published as: EP1020565A3; DE10001016A1; EP1020565A2

Abstract

An arrangement for dispensing and sprinkling binding agents onto a surface, for example for sprinkling a road soiled by oil with an oil-binding agent, has a distributing device located behind the outlet opening of a supply container. The distributing device uniformly ejects (or sprinkles) binding agent onto the areas of the road intended to be covered by the agent.
The distributing device preferably has adjustable sprinkling ranges and is designed in the form of a revolving sprinkling plate.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention:
The invention relates to an arrangement for dispensing and applying a binding agent or the like to a surface, and also to a cleaning device for cleaning the surface to which the binding agent was applied.
This arrangement is particularly useful for binding an environmentally-hazardous fluid, such as, for example oil on a roadway. The az<rangement both prevents soil and ground water contamination as much as possible and eliminates the hazard which a film of oil poses to traffic. The arrangement is advantageous also for binding other substances, especially combustible or nonvolatile substances that are hazardous to health. The arrangement is especially advantageous when used by fire departments, public road maintenance departments, or other technical assistance organizations. It may also be used in industrial plants operating with hazardous materials.

2. The prior Art: -. It is known to use a mobile arrangement or sprinkler carriage in an embodiment primarily used in the horticultural field also for dispensing a binding agent. In this device a through-like supply container ends in the form of a wedge at its bottom end. The container hae a row of apertures, through which the binding agent drops to the ground. The cross section of the apertures can be changed by means of slides in order~to adjust the amount of binding agent to be dispensed. A conveying roll is arranged in the lower area of the Supply container near the outlet apertures. This arrangement en$ures that the feed o~ the binding agent is metered and that the binding agent is loosened in the supply container. This arrangement, however, has not been successfully used in practice and, therefore, has failed to gain wide acceptance. For this reason, binding agents in these applications are typically applied to and distributed over the surface by hand. The soiled binding agent is subsequently swept up and disposed of.
A device for removing traces of oil from roads is known from German Patent DE 43 35 ~~7 C2. This device applies an undiluted 11g111d chemical binding agent to the soiled area via a spray nozzle, subsequently feeds fresh water, and then aspirates the resulting mixture into a dirty-water tank.

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German Patent DE 19 25529 U1 shows a device employing a blower to dispense a binding agent to pick up leaked oil. Bulk-like binding agent from a supply container is admitted via a conveyor screw into an air duct between the blower and the ejection opening. The agent is then carried along in the current of air. A flexible hose can be connected as an extension to the outlet opening of the air duct.
SUMMARY OF THE INVENTION
Therefore, the invention provides an arrangement for dispensing binding agents, which can be handled in a simple and reliable manner, as well as an advantageous cleaning device with such an arrangement.
Solutions as defined by the invention are discussed below as well as advantageous embodiments and further developments of the invention.

-3-In the arrangement as defined by the invention, a distributor device is arranged in the conveying path of the binding agent downstream of the outlet opening of the supply container. The distributor device can be advantageously adjusted in variable ways to adjust the surface area sprinkled by the distributor device. The binding agent, which is typically in granulate form,, is subjected to centrifugal force by the movement of the distributor device around an axis. The rotational motion guides the binding agent away from the axis and ejects it from the distributor device onto the surface below. The ability to adjust the surface area that is sprinkled allows the device to be adapted to different situations of application, for example particularly to oil traces on a road having different widths.
According to a preferred embodiment, the distributor device has a sprinkling plate arrangement with a sprinkling plate rotating around an axle. Sprinkling plate arrangements are known for distributing scatterable materials in the agricultural field, for example for dispensing fertilizers, seeds or soil treatment agents. Such arrangements are also known for dispensing thawing salt in winter road service operations. Therefore, dome constructional details of these known arrangements comprising sprinkling plates can be employed at least partly in connection with the preferred embodiment of the invention.

-4-For example, a winter road service sprinkling device is known from German Patent DE 40 16 369 C2. A centrifugal disk rotates about a vertical axle and distributes binding agent over a large surface area, the binding agent being fed to the disk via a slanted tube. The ejection range of the centrifugal disk can be changed with respect to position and alignment by swinging the tube about a vertical pivot axle.
German Patent DE 32 00 806 A1 describes, among other things, a device mounted on a vehicle for dispensing solids, admixtures and chlorides as thawing material in winter road service operations. A centrifugal disk with a vertical axis of rotation is provided for distributing the thawing material over a large surface area.
It was surprisingly found that the sprinkling plate arrangement is applicable not only for treating the surface with a low density of the sprinkled material, as is required in the known cases of application, but advantageously suited also for dispensing binding agents where a layer substantially covering an affected surface area, for example a trace of oil, has to be applied to such surface area in order to pick up the environmentally hazardous fluid as completely as possible. The entire contaminated surface area can be covered by dimensioning the preferably variable cross section of the outlet opening to a size of at least 10 sq. cm. The sprinkling density can be changed by adjusting the cross sectional area of the outlet opening to a lower value versus a maximum cross section.
To sprinkle a typically linear surface area such as, for example a trace of oil, the arrangement is moved usually in the direction of the linear trace of oil. Preferably, the sprinkling density amounts to at least 0.1 liter, preferably at least 0.2 liter binding agent per square meter based on the average of the surface area to be covered. Parameters such as the rate of dispensing of the binding agent, the moving speed, the scattering width and similar factors, determine the sprinkling density.
To sprinkle long-stretching, narrow surface areas, for example areas having widths under 1.50 meters, and in particular under lm width, a reversing plate may be provided in the outlet zone of the sprinkling plate arrangement. The plate catches at least those portions of the binding agent exiting from the sprinkling plate arrangement having higher lateral speed components, and deflects them toward the surface to be sprinkled.
The reversing plate may be removable and/or adjustable. Such a reversing plate is advantageous, particularly for sprinkling plates with a substantially vertical axis of rotation.

The sprinkling plate, in a manner known per ae, advantageously comprises a substantially planar sprinkling disk, which is aligned perpendicular to the axis of rotation. A
plurality of ejector blades project substantially perpendicularly from the sprinkling plate and are at least predominantly radially directed away from the sprinkling plate. Advantageously, provision is made for at least four, and in particular, at least six ejector blades, which are preferably offset against each other by identical angles. -zn an advantageous embodiment of a sprinkling plate arrangement within an arrangement of the invention, ejector blades distinctly end before reaching the outer edge of the sprinkling disk. This produces an edge zone in which the binding agent,is subjected to further uniform distribution by rolling it over. The spacing of the ends of the ejector blades from the edge of the sprinkling disk advantageously amounts to at least 15%, in particular at least 25% of the radius of the sprinkling disk.
The height of the ejector blades above the sprinkling dish advantageously is greater than 20~, in particular greater than 300 of the radius of the sprinkling disk.
Particularly advantageous is a sprinkling plate arrangement in which the axis of rotation of the sprinkling dish is inclined SW b0'd S086 S9~ 91S 80b ~ Q~d110~ 9b:bt 000-S0-Ndf l91-q~P 098-b YO d 9088 99E 9l9 Z~~~l 00-90-NVP

against the vertical line, whereby the inclination iS
predominantly, preferably approximately directed in the main direction of ejection of the arrangement. The main direction of ejection refers to the mean direction of ejection of material distributed over an angular range of ejection. The main direction of ejection is typically the direction in which the arrangement is moving for sprinkling a line- or strip-like surface area in or against the direction of motion of the arrangement_ The angle of inclination of the axis of rotation against the vertical line is advantageously between 0° and so°, preferably between 5°
and 45°, in particular between 10° and 30°. In particular, the angle of inclination may be adjustable.
Tn,particular for a sprinkling plate arrangement with an axis of rotation inclined against the vertical line, it is advantageous if the ejector blades are shaped so that the height of the blades above the sprinkling disk decreases radially outwardly. In particular, the top edges of the ejector blades may be disposed on the jacket of a circular cone. The outlet opening is preferably arranged in the region of the apex in the range of motion of the top edges of the ejector blades. The area stretching from the outlet opening extends substantially parallel with the top edges of the ejector blades sweeping by, in _ particular horizontally.
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The sprinkling plate arrangement preferably ends below the outlet opening and does not engage the opening. The rotary axle of the sprinkling plate arrangement advantageously penetrates the outlet opening, preferably at a point of penetration offset from the center of the outlet opening.
Such displacement is advantageous especially in the direction of the main direction of ejection and preferably amounts to between loo and 50% of the width of the opening.
Accordingly to an advantageous embodiment, the sum of the surface areas of the ejector blades amounts to at least 35%, preferably at least 45% of the surface area of the sprinkling disk. These percentages favorably influence uniform sprinkling of the surface to be sprinkled and provide a high sprinkling density.
To vary the surface area sprinkled with binding agent, it is possible to change the rotational speed of the sprinkling plate.
Changing the rotational speed of the sprinkling plate is particularly advantageous, and substantially realizable with infinite variability or in fine steps, if the distributing device is equipped with an electric, pneumatic or hydraulic drive. These types of drive for the distributing device are advantageous also in view of the sources of energy typically available for employing the arrangement, namely aggregates with an electric, pneumatic or hydraulic output.
Another advantageous embodiment of the invention comprises a distributing device with a swing arm and uses a principle of dispensing scatterable material that is known per se. This principle, however, has not as yet been employed or proposed heretofore for dispensing binding agents. The swing arm forms a guide (or feed) chute, which may be designed also in the form of a tube. The chute or tube performs a swinging motion about a substantially vertical axis, the agent being fed near the axis.
During this motion the chute ejects the binding agent centrifugally. The width of sprinkling of the binding agent may be varied by adjusting the deflection of the swing arm and/or by varying the swing rate of the swing arm. The statements made above with respect to the sprinkling plate arrangement apply correspondingly to the drive of the swing arm.
According to another advantageous arrangement, the distributing device is provided with a blade wheel revolving around a substantially vertical axis. The blade wheel is fed with the binding agent preferably in the vicinity of the apex. For distributing the binding agent transversely to the main direction of ejection, a baffle plate arrangement is useful.

The arrangement may be designed in the form of a mobile unit, which, in addition to the preferred types of drive specified above, may also comprise a coupling of the drive of the distributing device to the driving motion via a mechanical gearing. According to another advantageous embodiment, the arrangement is designed in the form of an attachment to a self-driving vehicle.
The supply device and/or the feed lines for feeding the binding agent to the outlet opening may advantageously contain devices preventing the binding agent from freezing, or getting clogged, or for eliminating such freezing or clogging. Such devices may have the form of agitating or stirring devices.
A cleaning device as defined by the invention, with a dispensing arrangement of the type described above, is designed as a mobile device, In addition to the dispensing arrangement, the device comprises at least one pick-up device, which picks up contaminated binding agent from the sprinkled surface. The dispensing arrangement, which is arranged in front of the pick-up device in the driving direction, sprinkles the contaminated or soiled surface with binding agent, which binds the contaminating material. The trailing pick-up device picks up the contaminated binding agent and collects it in a container. The pick-up device particularly may comprise a sweeping device and/or a suction device.

For driving the cleaning device, both the dispensing arrangement and the pick-up device may be designed according to one embodiment in the form of attachments mounted on a self-driving vehicle, for example a fire department vehicle or road service utility vehicle. Each attaching device may be supported solely by the vehicle, without their owr_ ground support, or they may have their own non-driven chassis, in particular in the form of a towed trailer vehicle for the pick-up device. Preferably, the dispensing arrangement is mounted on the front side of the vehicle and the pick-up device on its rear side.
According to another embodiment, one of the devices may be self-driving and the other may be designed as an attachment device mounted on the self-driving device.
The sprinkling arrangement, which is located in front of the pick-up device dewed in the driving direction, preferably points with its main direction of ejection in the driving direction, i.e. it sprinkles ahead as it moves.
A mechanical re-distributing arrangement may also be provided between the pick-up device and the dispensing (or sprinkling) arrangement. This re-distributing arrangement brings the binding agent applied to the contaminated surface into intimate contact with the contaminate by re-distributing it and turning it over on the soiled surface in the way of manual sweeping up. In this way, superior bonding of the contaminant to the binding agent is assured.
Essentially any known drive can be used as a drive for the dispensing arrangement and/or the pick-up device. For attaching devices it is preferred to employ drives using power sources available on the carrier vehicle, in particular electrical, pneumatic or hydraulic drives. With devices mounted on a chassis, it is possible also to make provision for a mechanical drive via the rotation of the wheels.
As additional equipment for the cleaning device, and in particular in connection with a pick-up device comprising a suction device, it is possible also to make provision for an auxiliary device, for example in the form of a stream jet device or a high-pressure cleaner for detaching and removing the soiled binding agent from the sprinkled surface. The auxiliary device is preferably arranged with a small spacing from the pick-up device.
A suitable binding agent is known, for example from German Patent DE 18 11 131 B2.

BRIEF DESCRIPTION OF THE DRAWINGS:
Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the drawings which disclose preferred embodiments of the present invention. It should be understood, however, that the drawings are designed for the purpose of illustration only and not as a definition of the limits of the invention.
In the drawings, wherein similar reference characters denote similar elements throughout the several views:
FIG. 1 shows an arrangement with the sprinkling plate and distributing device on the dispensing side.
FIG. 2 is a top view of the plane of the sprinkling plate in FIG. 1.
FIG. 3 shows a preferred design with the sprinkling plate.
FIG. 4 is a top view of the sprinkling plate arrangement according to FIG. 3.
FIG. 5 shows an embodiment with a blade wheel.

FIG. 6 is a side view of FIG. 5; and FIG. 7 shows a cleaning device with an arrangement for dispensing binding agent.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 shows a horizontal view from the dispensing side of an advantageous embodiment of the arrangement with a sprinkling plate as the distributing device. A sprinkling plate 14 is designed in the form of a substantially planar and horizontally aligned disk, which supports a multitude of ejection blades. The sprinkling plate is driven above or below by a suitable motor drive (not shown) and revolves around a substantially vertical rotary axis 13. FIG. 2 shows a top view of a cross section taken through line 2-2 of FIG. 1 of the sprinkling plate of the arrangement according to FIG. 1.
A supply of granular binding agent is present in a supply container 17. The binding agent drops onto the rotating plate through an outlet opening 12 located above the sprinkling plate, with substantially uniform metering of the amount being dispensed. The cross section of the outlet opening can be narrowed down versus the maximum width of the opening by means of a slide not shown in the drawing. An agitating device 18 located in the supply container 17 prevents freezing of the binding agent 15 in the supply container.
The binding agent dropping onto the sprinkling plate through the outlet opening 12 is carried along by the ejection blades and carried outwardly by centrifugal forces. It is then ejected onto the surface 19 across the edge of the disk within a sprinkling angle 20. The average initial ejection speed and thus the distance over which the binding material is thrown, are substantially determined by the geometry of the sprinkling plate with the ejection blades, and by the rotational speed of the sprinkling plate, and are adjustable especially through the adjustment of the rotational speed.
For long-stretching surface areas with a small width, no greater ejection distances are needed and also are not desired because of the higher consumption of binding agent if the binding agent is thrown over a great distance. Especially when covering such areas, reversing (or deflecting) baffle plates 16 maybe provided for. limiting the ejection distance sideways. Such baffle plates deflect at least the components of the binding agent sprinkled with a higher ejection speed and, therefore, deflect such components in the direction of the surface 19 with a flatter trajectory. For the purpose of varying the limitation of the ejection distance, the deflecting baffle plates may be adjustable particularly with respect to their lower edging.

Also, the deflecting baffle plates may be closed in the form of a U-shaped or semi-circularly shaped ring.
It is particularly important in connection with the preferred embodiment sketched in the side view according to FIG. 3 that the direction of the axis of rotation 13 of the sprinkling plate arrangement is inclined against the vertical line 31 by an angle 30 of about 20 degrees in the case of the present exemplified embodiment. The plane sprinkling disk 32 of the sprinkling plate arrangement is aligned perpendicular to the axis of rotation.
The angle of inclination may be adjusted, for example, by a hinge 26 connecting support plate 33 and sprinkling plate carrier 28.
The ejection blades 11, which projects from the plane of the sprinkling disk 32, show a blade height above the sprinkling disk 32 which radially decreases outwardly. In this way, the blades reach outwardly only up to a radius 38, which is clearly smaller than the radius 37 of the sprinkling disk 32, as illustrated by the top view of the sprinkling plate arrangement sketched in FIG.
4. As shown in FIG. 4, blades 26 generally radiate outwardly from a single point offset from the center 39 of the outlet opening 12.
Due to omission of the surfaces of the blades in the edge zone 27, the binding agent centrifugally accelerated by being carried along by the blades is capable of rolling over, so that further improvement of the uniformity of the ejection pattern can be achieved.
In the embodiment of FIG. 3, the sprinkling plate arrangement is supported by a sprinkling plate carrier 28, which has a driving arrangement, for example an electric motor 29 arranged on its underside. The electric motor is connected with the sprinkling plate arrangement via a driving shaft. The sprinkling plate arrangement 28 is connected with a support plate 33, for mounting the arrangement, for example on a vehicle.
Furthermore, a supply container carrier 25 for supporting and holding the supply container 17 is connected with the support plate 33.
The outlet opening 12 is arranged in the vicinity of the apex of movement of the top edges of the ejection blades 26.
The top edges of the ejection blades substantially extend in this area parallel with the area stretching from the outlet opening, preferably in a substantially horizontal way.
The axis of rotation advantageously penetrates the outlet opening. The position 35 of the axis of rotation is preferably offset in the main direction of ejection against the center 39 of the outlet opening 12 by a distance 34, as shown in FIG. 3. The displacement distance 34 preferably amounts to between l0a and 500 of the opening width 36 of the outlet opening.

'Viewed in the main direction-of ejection, FIG. 5 shows a distributing device with a blade wheel 9~6 revolving around a horizontal axis of rotation 47. Between two side plates 45, the blade (or bucket) wheel has a multitude of driving blades or buckets predominantly extending in the radial direction. The blade or bucket wheel is Connected via a driving shaft 48 with a dx-iving arrangement such as, for example a laterally arranged electric motor 29. FIG. 6 shows a s~,de view of the arrangement according to FIG. 5, in which the motor and one side~plate are omitted.
From the supply container, binding agent is transported onto the blade wheel via the outlet opening 12 positioned in the region of the apex of the blade wheel, then carried along by the blades, 49, and subsequently thrown in the direction of ejection onto the surface to be sprinkled. Fox' achieving a stronger component of lateral ejection far portions of the ejected binding agent, the driving blades and/or the side plates may be provided with a curvature. Alternatively, or in addi~.ion, deflecting plates or the like may be provided within the area of ejection.
FIG. 7 shows.an advantageous cleaning device, where an arrangement 53 for dispensing a binding agent 54 and sprinkling it over a contaminated or soiled surface 55 is secured on tl~e front side of a self-driving vehicle 52. The arrangement 53 SZi~O'd 5086 S9~ 91S 308 '8 Qbd110~ 9b:bZ 000-S0-Ndt l91-q~f 0~8-b ZO d 9088 99fi 9l~ Z~~YI 00-~0-NVf throws binding agent onto the surface 55 in the driving direction 58 of the vehicle 52. The arrangement 53 is driven by on-board power equipment of the vehicle 52.
A collection device 56 for receiving soiled (or contaminated) binding agent is designed in the form of a mobile trailer unit, which is towed behind the vehicle 52 by the vehicle. On its underside facing the surface 55, the collecting device 56 has a sweeping device 59, which picks up soiled binding agent lying on the surface 55 and conveys the binding agent into a collection container 57 of the collection (receiving) device.
Again, the drive of the sweeping device 59 may be fed via on-board supply equipment of the vehicle 52. Alternatively the device may be driven by mechanically coupling it to the rotation of the wheels of the trailer.
The design of the cleaning device may conceivably comprise a great number of possibilities for combining the individual components.
The features described above and in the claims can be advantageously realized both individually and in different combinations. The invention is not limited to the exemplified embodiments described above, but can be modified in many ways within the scope of the skills of the expert in this field. For example, the drive may be designed in various ways as will be apparent to an expert in this field.
Accordingly, while several embodiments of the present invention have been shown and described, it is to be understood that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

WHAT IS CLAIMED IS:

1. An arrangement for dispensing a binding agent for binding a fluid hazardous to the environment on a surface comprising:
(a) a distributing device movable around an axis of rotation;
(b) a supply container having an outlet opening for feeding the binding agent to the distributing device;
(c) whereby the distributing device sprinkles the fed binding agent onto the surface centrifugally away from the axis of rotation.

2. The arrangement according to claim 1, wherein the distributing device comprises a sprinkling plate arrangement having a sprinkling plate rotating about the axis of rotation, said sprinkling plate comprising a substantially planar sprinkling disk and ejection blades projecting from said disk.

3. The arrangement according to claim 2, wherein the axis of rotation of the sprinkling plate is inclined against the vertical by an angle between 0° and 60°.

4. The arrangement according to claim 3, wherein the angle of inclination is adjustable.

5. The arrangement according to claim 3 wherein the axis of rotation is inclined against the vertical in the main direction of ejection.

6. The arrangement according to claim 2, wherein the sprinkling plate has a variable rotational speed.

7. The arrangement according to claim 2, wherein the sprinkling plate has at least four ejection blades.

8. The arrangement according to claim 2, further comprising a deflecting plate arranged in an area where the binding agent is ejected.

9. The arrangement according to claim 2, wherein at least some of the ejection blades are spaced from the edge of the sprinkling disk by at least 15% of the radius of the sprinkling disk.

20. The arrangement according to claim 3, wherein the height of the ejection blades is at least 20% of the radius of the sprinkling disk.

11. The arrangement according to claim 4, wherein the height of the ejection blades radially decreases outwardly.

12. The arrangement according to claim 11, wherein the ejection blades have top edges facing away from the sprinkling disk disposed on a jacket surface of a circular cone.

13. The arrangement according to claim 12, wherein the top edges of the ejection blades extend approximately horizontally when in their highest position and the axis of the sprinkling plate is inclined against a vertical reference line.

14. The arrangement according to claim 12, wherein the outlet opening has a dispensing plane and the top edges of the ejection blades are disposed approximately parallel with the dispensing plane of the outlet opening when the top edges are in their position of rotation facing away from the main direction of ejection and the axis of the sprinkling plate is inclined against a vertical reference line.

15. The arrangement according to claim 4 wherein the axis of the sprinkling plate is offset from the center of the outlet opening in the main direction of ejection.

16. The arrangement according to claim 15, wherein the axis is displaced from the center of the opening between 10% and 50%
of the width of the opening.

17. The arrangement according to claim 1, wherein the distributing device has a blade wheel rotating around a substantially horizontal axis of rotation.

18. The arrangement according to claim 1, wherein the distributing device has a chute directed radially away from the axis of rotation, said chute being pivoted about an axle.

19. The arrangement according to claim 18, wherein the chute performs a swinging motion about an axis, the deflection and speed of the swinging motion being variable in a presettable manner.

20. The arrangement according to claim 1, wherein the distributing device is adjustable to select a range of surface area sprinkled with binding agent by the distributing device.

21. The arrangement according to claim 1, wherein the outlet opening has a maximum cross sectional area of at least 10 square centimeters.

22. The arrangement according to claim 1, wherein the distributing device is driven electrically, pneumatically or hydraulically, or via wheel rotation of a vehicle.

23. The arrangement according to claim 1, wherein the outlet opening has a variable cross sectional area.

24. The arrangement according to claim 1, wherein the arrangement is designed in the form of a mobile unit.

25. The arrangement according to claim 1, wherein the arrangement is designed as an attachment to a self-driving vehicle.

26. The arrangement according to claim 1, wherein the arrangement has a sprinkling density of at least 0.1 liter, binding agent per square meter surface area.

27. A mobile cleaning device comprising:
(a) an arrangement for dispensing a binding agent comprising a distributing device movable around an axis of rotation, and a supply container having an outlet opening for feeding the binding agent to the distributing device, whereby the distributing device sprinkles the fed binding agent onto a surface centrifugally away from the axis of rotation;
(b) a pick-up device for receiving binding agent from the sprinkled surface, the arrangement being mounted in front of the pick-up device in a direction of travel of the cleaning device.

28. The device according to claim 27, wherein the pick-up device comprises a sweep-up device.

29. The device according to claim 27, wherein the pick-up device comprises a suction device.

30. The device according to claim 27, further comprising a device for re-distributing the binding agent applied to the surface, said re-distributing device being arranged between the arrangement for dispensing the binding agent and the pick-up device.

31. The device according to claim 27, wherein the pick-up device and the dispensing arrangement are attachable to a vehicle.

32. The device according to claim 27, wherein the pick-up device comprises a vehicle and the dispensing arrangement comprises equipment attached to the vehicle.

33. The device according to claim 27, wherein the dispensing arrangement comprises a vehicle and the pick-up device comprises equipment attached to the vehicle.