WO2003024579A1

WO2003024579A1 - Spray box

Info

Publication number: WO2003024579A1
Application number: PCT/DE2002/003209
Authority: WO
Inventors: Anton Lindner
Original assignee: Anton Lindner
Priority date: 2001-08-30
Filing date: 2002-08-30
Publication date: 2003-03-27
Also published as: DE10157160A1; DE20114202U1; DE10294195D2

Abstract

The invention relates to a spray box for wetting abrasives (1) from a silo (3) or from a belt conveyor, which comprises a housing (4) provided below a silo (3) or below the downstream end of a conveyor belt (2). Said housing (4) is provided with one or more oblique surfaces (6), with a distance (9) between the lower edges (7) of every oblique surface (6) and the respective opposite housing wall (8) which ranges from 1.5 cm to 45 cm. One or more spray devices (10) for a liquid medium (22) are directed onto every oblique surface (6) from above and/or one ore more spray devices (10) are directed onto the flow of abrasives (11) that enters directly the housing (4). One or more spray devices (10) are directed onto the areas (12) between the lower edges (7) of the oblique surfaces (6) and the housing walls (8) opposite thereto from below and/or from above.

Description

spray box

The present invention relates to a device for moistening granular or powdery grit with the features specified in the preamble of claim 1.

When granular or powdery grit - for example, road salt - is spread on roads, this is often caught by air currents during the spreading and unused in the ditch away from the road.

In order to avoid this disadvantage of an undesired loss due to blowing, it has been adopted to moisten granular or powdery spreading material before spreading.

The moistened spreading material can be applied in a more targeted manner; it falls much more accurately than dry spreading material onto the surfaces in the spreading cone of the spreading device and thereby increases the efficiency of the spreading material.

A device for moistening granular or powdery grit is known from the prior art, in which the grit stream is sprayed with water while the grit is being loaded with a granular or powdery grit.

This known device for moistening granular or powdery scattering material is disadvantageous in particular because its throughput is too low and because of it of a caked-up, solidified spreading material that is too high in moisture content can quickly clog this device and make it unusable.

It is therefore an object of the present invention to provide a device for moistening granular or powdery grit, which allows a high throughput of moistened grit in a particularly short time and to precisely and precisely define moistening of the grit, excluding the risk of the grit caking together enabled because of a too high moisture content.

According to the invention, this object is achieved in a generic device by the features specified in the characterizing part of patent claim 1. Particularly preferred embodiments are the subject of the dependent claims.

Embodiments of the invention are described in more detail with reference to the drawings. Show it:

Figure 1 is a side view of a silo with a device according to the invention for moistening granular or powdery grit;

FIG. 2 shows a schematic, perspective view of a spray box-like device according to the invention for moistening granular or powdery grit;

3 shows a schematic, perspective view of the moistening device with 6 spray devices according to FIG FIG. 4 shows a schematic cross section through a device according to the invention;

5 shows a schematic side view of a row of silos with a device according to the invention which can be moved from silo to silo on rails.

The device according to the invention for moistening granular or powdery grit can comprise, for example, one or more conveyor belts for transporting the grit (1) to be moistened.

As an alternative or in addition to this, the device according to the invention for moistening granular or powdery grit (1) can comprise one or more silos (3) for storing the grit to be moistened (1), each silo (3) preferably completely or partially, as well as manually operated or automatically openable and closable emptying openings (5).

As a rule, the device according to the invention for moistening granular or powdery scattering material (1) further comprises at least one housing (4) which is located below the or the discharge openings (5) of the silo (s) (3) or below the downstream end of the conveyor belt ( 2) can be provided rigidly or displaceably or moved.

As a rule, one, two, three, four, five, six, seven, eight, new, ten or more inclined surfaces (6) are provided in the housing (4). The length of the inclined surfaces (6) is, for example, in the range from 5 cm to 200 cm, preferably in the range from 6 cm to 120 cm, in particular in the range from 7 cm to 100 cm.

These inclined surfaces (6) are preferably aligned with one another in the form of a letter U or V standing upside down or in the form of a pyramid or a circular cone or a truncated cone or a spherical segment or a rotational paraboloid or a polyhedron or a wedge.

In general, a distance (9) is provided and formed between the lower edges (7) of each inclined surface (6) and the respectively opposite wall (8) of the housing (4), which is in the range from 1.5 cm to 45 cm, preferably in Range from 2.0 cm to 40 cm, in particular in the range from 3.0 cm to 35 cm, and among other things for the passage of the spreading material (1) running over the inclined surfaces (6) and as a "flight path" for the slipped off spreading material ( 1) serves.

Maintaining this distance (9) between the lower edges (7) of the inclined surface (6) and the respectively opposite wall (8) of the housing (4) in the above-mentioned area is of particular importance, since only then is a sufficiently high throughput and a sufficiently long "flight path" for targeted moistening, for swirling and for preventing caking of the grit and thus clogging of the device is guaranteed.

In preferred embodiments of the device according to the invention, one can cover each sloping surface (6) or at least part of it from above or in sections as well as vertically or obliquely from above or a plurality of spray devices (10) for spraying that liquid (22) can be directed rigidly or can be changed in its position and / or its orientation with which the spreading material (1) flowing along the inclined surfaces (6) is to be sprayed.

As an alternative or in addition to this, one or more spray devices (10) can be directed rigidly or changeably at the stream (11) of spreading material (1) emitted directly from the assembly line and / or from the silo (3).

A plurality of spray devices (10) are preferably rigid or changeable on the areas (12) between the lower edges (7) of the inclined surfaces (6) and the walls (8) of the housing (4) opposite them directed from below and / or from above.

As a rule, the flow rate or the flow rate of the material to be moistened (1) along the inclined surfaces (6) is in the range from 0.1 m per second to 10 m per second, preferably in the range from 0.3 m per second to 7.0 m per second, in particular in the range from 0.5 m per second to 5.0 m per second.

The thickness (13) of the layer of scattering material (1) flowing along the inclined surfaces (6) can be, for example, in the range from 1.0 cm to 44 cm, preferably in the range from 2.0 cm to 30 cm, in particular in the range from 3.0 cm to 20 cm.

In particularly preferred embodiments, they are directed from above onto the inclined surfaces (6) or from above onto the downstream sections of the scattering path Spray devices (10) are provided between the respective inclined surface (6) and the wall (8) of the housing (4) opposite this.

The spray devices (10) directed from below onto the areas (12) between the lower edges (7) of the inclined surfaces (6) and the opposite walls (8) of the housing (4) can, for example, be provided completely or at least partially below the inclined surfaces (6) his.

According to the present invention, the grit container of a grit vehicle can be loaded from a silo (3) located above the grit container on the vehicle. For this purpose, the grit (1) can be run over the inclined surfaces (6) below the emptying opening (5) of the silo (3), with each of the grit flows (1) flowing along the inclined surfaces (6) from the outside and / or is sprayed with liquid (22) from the inside, namely from locations below and above the inclined surfaces (6).

The liquid (22) used for spraying according to the invention can be, for example, water or an alkali such as CaCl ₂ solution.

In a particularly preferred embodiment of the device according to the invention, a housing (4) of a spray box according to the invention is provided below an emptying opening (5) of a silo (3), in which two inclined surfaces are arranged essentially roof-shaped in such a way that between the lower edge (7) of each inclined surface (6) and the opposite wall (8) of the housing (4), a passage opening for the spreading material (1) extending over the inclined surface (6) remains. Preferably, between each inclined surface (6) and the housing wall (8) opposite it or its extension upward, on the one hand, and under the inclined surfaces (6), on the other hand, nozzle-like spray devices (10) directed towards the path of the scattering material (1) for a liquid (22) conveyed under pressure by means of at least one pump.

With the device according to the invention, the container of a spreading vehicle can be loaded extremely quickly.

When using conventional silos with a capacity of 100 m ³ to 250 m ³ , for example 6 m ³ can be enriched with 20% moisture in less than three minutes and can be loaded into the grit container of a gritting vehicle during this period. The shape of the inclined surfaces (6) can ensure that the spreading material is well distributed in the mostly rectangular container of the spreading vehicle. Basically, a moisture content up to 80% can be achieved. Immediately after loading the moistened spreading material (1), the spreading vehicle can drive off and begin to spread the spreading material immediately or after some time. For example, a screw conveyor at the bottom of the grit container can possibly convey the road salt to a grit plate. If necessary, the spreading material is mixed again at the spreading plate so that the spreading material is spread in a uniformly moist state.

The method according to the invention and the device according to the invention consequently lead to the advantage that the spreading vehicles can only be preloaded far before use and not in a long filling process.

The correct metering of the amount of liquid (22) sprayed onto the spreading material (1) is advantageously carried out a valve, for example a solenoid valve, is arranged in the liquid line, which leads from a pump to the possibly nozzle-like spray devices (10).

In order to ensure that liquid does not emerge from the spray devices (10) until the spreading material (1) runs over the inclined surfaces (6), in particularly preferred embodiments, between the emptying opening (5) of the silo (3) and the upper edge (14) the inclined surfaces (6), for example, a light, radio or ultrasonic barrier is arranged, which represents part of the control device of the solenoid valve in the line from the pump to the spray devices (10). By means of this light, radio or ultrasound barrier, the solenoid valve is preferably only opened when the spreading material (1) through the space between the housing (4) receiving the inclined surfaces (6) and the lower edge of the discharge opening (5) passes.

As an alternative to this, a control device for the synchronized control of the emptying opening (5) of the silo (3) and the solenoid valve between the pump and the spray devices (10) can be provided to synchronize the liquid supply into the stream of the spreading material to be loaded.

Each spray device (10) is preferably connected to one or more pumps which supply the liquid medium (22) to be sprayed with a pressure in the range from 0.1 bar to 80 bar, preferably in the range from 0.5 bar to 60 bar. in particular in the range from 0.6 bar to 19.0 bar.

The delivery rate of such a pump is, for example, in the range from 2000 liters per hour to 8000 liters per hour, preferably in the range from 3500 liters per hour up to 7000 liters per hour, in particular in the range from 4000 liters per hour to 5500 liters per hour, for example at a pressure of about 30 bar.

As a medium (22) for moistening the granular or powdery scattering material (1), a lye is usually considered, which was previously produced in a separate system. Such a separate system is fundamentally no longer necessary in the device according to the invention. In particular, it is not necessary if the pump conveys the liquid from a container into which a pipeline opens, which branches off from the delivery line between the pump and the nozzles via a three-way valve. In this case, with the help of a pump-around process, the liquor can be produced from the liquid in the container and the solid (salt) poured into the container by the pump continuing to feed the liquid-solid mixture via the branch line leading back into the container pumped until all solid parts have dissolved in the liquid.

For larger road maintenance companies, the spreading material (1) is often stored in several silos (3). As a rule, the silos (3) are set up in a row below which there is a path for the vehicles to be loaded (see FIG. 5).

As can be seen from FIG. 5, in the case of such a row of silos (3), the housing (4) of the spray box according to the invention can, for example, be movably carried by rollers (15), these rollers (15) possibly on rails (16) below the silos (3) run. At least part of the liquid line between the pump and the possibly nozzle-like spray devices (10) is then preferably designed in the form of a hose. After a silo (3) has been emptied, the housing (4) receiving the inclined surfaces (6) and the spraying devices (10) can be moved under the next silo (3) and moisten the spreading material (1) from this silo there. In this way it is possible to use only a single spray box housing (4) running on rails for a large number of silos (3), which comprises inclined surfaces (6) and the spray devices (10).

In a particularly preferred embodiment of the device according to the invention, the emptying opening (5) of the silo (3) is designed in the manner of a fish mouth closure, which is evident and can be closed by means of a hydraulic or pneumatic actuation device, if applicable. Such a design is particularly suitable for remote-controlled automatic actuation.

A particularly preferred embodiment of the device according to the invention comprises two inclined surfaces (6) which correspond to one another on the head

Letters V or U are aligned, four, five, six, seven, eight, nine, ten or more nozzle-like spray devices (10) being located below the two inclined surfaces (6), two or more of which, for example, on each of the two of the inclined surfaces

(6) downward streams of grit (1) are directed from below, and in front of the insides of the walls of the housing (4) opposite the inclined surfaces (6) above or at the height of the inclined surfaces (6) one or more on each inclined surface (6 ) nozzle-like spray devices (10) directed from above.

With this arrangement of spray devices (10), particularly good humidification can be achieved when using adjustable, variable nozzles (10). Such an arrangement of spray devices (10) is shown especially easy to install. The manufacturing effort and the manufacturing costs are kept particularly low due to this simple design. Due to the simple design, this device is also particularly robust.

It is obvious that the device according to the invention cannot be used only with large silos (3).

Rather, it can also be used in small silos (3) which have only such a size that they hold the filling material for a single loading of a spreading vehicle. The device according to the invention can be used, for example, in silos (3) which only take up 5 m ³ , that is to say a single customary loading quantity for a spreading vehicle.

As a rule, each silo (3) comprises a cylindrical wall, which is closed at the bottom h by a conical or funnel-shaped bottom, which can preferably have one or more emptying openings (5) centrally. As a rule, each silo (3) stands on a stand that consists of feet and a support ring on which the silo is placed (see Figures 1 and 5).

As can be seen in particular from FIG. 4, in a particularly preferred embodiment, two inclined surfaces (6) can be arranged in a substantially roof-shaped manner in the housing (4) or aligned with one another in the form of a letter V or U standing on the head, the incline ^¬ flat (6) include, for example, an angle α in the range from 50 ° to 110 °, preferably in the range from 60 ° to 95 °, in particular in the range from 70 ° to 85 °. The upper edges (14) of the inclined surfaces (6) can, for example run into a common ridge line. This ridge line is preferably provided under the middle of the closable emptying opening (5) of a silo (3).

As a rule, at least two walls of the housing (4) are aligned parallel to one another. The inclined surfaces (6) can, for example, be attached laterally to these walls. The two other side walls are preferably also arranged parallel to one another.

In particularly simple and inexpensive embodiments, all or at least some of the walls (8) of the spray box housing (4) are designed in the form of flat surfaces.

At least the two walls opposite the lower edges (7) of the inclined surfaces (6) are preferably angled when viewed from the side (see FIG. 2).

The angled design of these walls (8) is preferably such that the upper parts of these angled walls have the same direction of inclination as the opposite associated inclined surfaces (6), while the wall parts arranged below have an opposite direction of inclination. The kink (20) between these two wall parts can be located, for example, at the level of the lower edge (7) of the corresponding inclined surface (6) or higher.

The spreading material (1) from the silo (3) which strikes the inclined surfaces (6) slides along the inclined surfaces (6) and usually falls or impacts the lower part (17) of the wall (8) of the spray box housing ( 4). The lower section (17) of the wall (8) of the housing (4), which lies in the region of an imaginary extension of the longitudinal axis (18) of the inclined surface (6), is preferably essentially perpendicular to the longitudinal axis (18) of the inclined surface ( 6) aligned or includes with the extension of the longitudinal axis (18) an angle β which is in the range from 70 ° to 140 °, preferably in the range from 75 ° to 120 °, in particular in the range from 80 ° to 100 °.

The lower wall section (17) preferably serves as an impact surface and / or as a guide surface for the grit (1) flowing away from the corresponding inclined surface (6).

The lower parts of the walls (8) are preferably designed so that they form a funnel.

This embodiment is particularly advantageous when the grit containers on the respective grit vehicles have a rectangular outline shape. If, on the other hand, the grit containers of the road vehicles have an elongated floor plan, the grit is preferably allowed to flow into the elongated grit container in divergent ways.

The length (19) of the lower section (17) of the wall (8) of the housing (4), which lies in the region of an imaginary extension of the longitudinal axis (18) of the inclined surface (6) downward, is for example in the range of 0.1 up to 4 m, preferably in the range from 0.2 m to 3.0 m, in particular in the range from 0.3 m to 2.0 m.

One or more spray devices (10) can be located in the center under the upper edge of the housing wall (8) with which the outward-facing surface of the grit (1) flowing on the inclined surfaces (6) is sprayed with liquid (22).

Below the inclined surfaces (6), for example, a pair or more nozzle-like spray devices (10) can be arranged on each side, with which the underside of the flow of material (1) flowing down the inclined surfaces (6) can be sprayed with moisture (22). For example, a total of, for example, six or more nozzles can be located in the housing (4), of which at least three are each assigned to an inclined surface (6).

As already mentioned, the emptying opening (5) of the silo (3) can be designed as a fish mouth opening. In this case, it comprises, for example, two blades which lie against one another with the edges on their underside and on their sides when the emptying opening (5) is closed. These blades are preferably pivotable about a substantially horizontal, overhead axis and are moved, for example, with the aid of hydraulic or pneumatic cylinders.

In a particularly preferred embodiment, the walls (8) of the housing (4) opposite the inclined surfaces (6) are designed to be angled when viewed from the side, the upper part of each of these walls having the same inclination direction as the opposite and associated inclined surfaces (6) has, while the underlying part (17) of the wall (8) of the housing (4) has an opposite direction of inclination.

The kink (20) between the upper and lower part (17) of the respective angled wall (8) is for example, approximately at the level of the lower edge (7) of the opposite inclined surface (6).

Alternatively, the kink (20) between the upper and lower part (17) of the respective angled wall (8) can be arranged at a distance (21) above the lower edge (7) of the inclined surface (6) opposite this, the distance (21) is, for example, in the range from 1.0 cm to 60.0 cm, preferably in the range from 2.0 cm to 50.0 cm, in particular in the range from 3.0 cm to 40.0 cm.

One or more light, radio or ultrasonic barriers can be arranged, for example, between the lower edge of the emptying opening (5) of the silo (3) and the upper edge of the housing (4).

The beam emitted by the transmitter and picked up by the receiver is preferably interrupted as soon as the emptying opening (5) of the silo (3) is opened and scattered material falls out of the silo (1) downwards.

A control for a solenoid valve can then be activated by the receiver, for example, this solenoid valve possibly being arranged in the feed line of the liquid to the possibly nozzle-like spray devices (10). As soon as no more spreading material (1) runs through the path leading from the transmitter to the receiver, ie when the receiver can again receive the beam from the transmitter, the solenoid valve is preferably closed. This can be the case, for example, when the emptying opening (5) of the silo (3) is closed or the respective silo (3) is empty.

The provision of such a light, radio or ultrasonic barrier in conjunction with one or more solenoid valves ensures that liquid (22) only emerges from the spraying devices (10) when really spreading material (1) runs through the housing (4).

In this way, under-wetting or over-wetting of the spreading material (1) is reliably avoided.

The transmitter and the receiver of the light, radio or ultrasound barrier described above can be attached, for example, in the region of the upper edge of the walls (8) of the housing (4). The solenoid valve can also be attached to the outside of the housing (4). This ensures that when the housing (4) is moved from one silo to another silo, the control device is also moved.

For this displacement process of the housing (4) it is advantageous if at least part of the liquid supply line is designed as a hose. This hose can be suspended in several loops in a known manner, so that the hose does not get tangled during a movement of the housing (4) from one silo (3) to the next silo (3).

In preferred embodiments, the liquid supply line is coupled to the outlet of a high-pressure pump. As a rule, the pump is fed with liquid (22) from a liquid container via a separate line.

A multi-way valve can be located behind the pump, which valve may make it possible to pump the pressure fluid (22) coming from the pump either into this supply line or into a return line.

The return line leads back to the liquid container, for example. The return line, if present, is used to, for example, a lye in the liquid to generate keitsbehalter from water and a solid (salt; CaCl ₂ ) by pumping the solid-liquid mixture until the solid has completely dissolved. This return line is also used, if necessary, if the pump is to operate without pressure before it is switched off or if it has to operate without pressure during the starting process.

In a preferred embodiment of the device according to the invention, the complete system can operate fully automatically at the push of a button.

For this purpose it is advantageous to provide a corresponding control circuit which starts the pump, switches on the supply line to the pump and actuates the drain opening (5). Of course, there is also the possibility that the solenoid valve is actuated simultaneously with the opening and closing of the emptying opening (5) if, for example, no light barrier is used.

The spreading material (1) is, for example, road salt, artificial fertilizer or seed.

In summary, it should be noted that the device according to the invention for moistening granular or powdery scattering material is particularly advantageous over the device for moistening granular or powdery scattering material known from the prior art because its throughput is particularly due to the precisely specified distance (9) between the Bottom edges (7) of the inclined surfaces (6) and the opposite walls (8) of the housing (4) is very large and there is no risk of clogging there. Another advantage of the device according to the invention for moistening granular or powdery grit can be seen in the fact that in a particularly short time and, if appropriate, with a particularly small amount of liquid, it can moisten the grit precisely in a precisely controllable and definable manner, with the exclusion of the risk of caking of the grit - even with a very high moisture content.

Claims

claims

1. Device for moistening granular or powdery scattering material (1), characterized in that it uπi- summarizes:

- One or more conveyor belts for transporting a grit to be moistened (1)

- and / or one or more silos (3) for storing the grit to be moistened (1) with one or more completely or partially, as well as manually or automatically opened and closable emptying openings (5),

a housing (4) which is provided rigidly or displaceably or displaceably below the discharge opening (s) (5) of the silo (s) (3) or below the downstream end of the conveyor belt (2),

- Wherein in this housing (4) one, two, three, four, five, six, seven, eight, nine, ten or more inclined surfaces (6) are provided, which are in the form of a letter U or V or in the form of a pyramid or a circular cone or a truncated cone or a spherical segment or a rotational paraboloid or a polyhedron or a wedge,

- Wherein between the lower edges (7) of each inclined surface

(6) and the respective opposite wall (8) of the housing (4) a distance (9) is provided, which is in the range of 1.5 cm to 45 cm, - and being on each inclined surface (6) or at least one Part of this covering the entire area or in sections and vertically or obliquely from above one, two, three, four, five, six, seven, eight, nine, ten or more spray devices (10) for spraying that liquid (22) rigidly or in their position and / or the direction with which the scattering material (1) flowing along the inclined surfaces (6) is to be sprayed can be changed,

- And / or where on the flow of material (2) and / or from the silo (3) directly delivered material

(11) one, two, three, four, five, six, seven, eight, nine, ten or more spray devices (10) are directed rigidly or changeably,

- And wherein on the areas (12) between the lower edges (7) of the inclined surfaces (6) and the opposite walls (8) of the housing (4) one, two, three, four, five, six, seven, eight, nine , ten or more spray devices (10) are directed rigidly or changeably from below and / or from above.

2. Device according to claim 1, characterized in that the flow rate or the flow rate of the material to be moistened (1) along the inclined surfaces (6) is in the range of 0.1 m per second to 10.0 m per second.

3. Device according to one or more of the preceding claims, characterized in that the thickness (13) of the layer of scattering material (1) flowing along the inclined surfaces (6) is in the range from 1.0 cm to 44 cm.

4. Device according to one or more of the preceding claims, characterized in that it comprises two inclined surfaces (6) which are aligned with one another in the form of a letter V or U standing on the head, the inclined surfaces (6) having an angle α in the region enclose from 50 ° to 110 °.

5. Device according to one or more of the preceding claims, characterized in that that section

(17) of the wall (8) of the housing (4), which lies downward in the region of an imaginary extension of the longitudinal axis (18) of the inclined surface (6), is oriented essentially at right angles to the longitudinal axis (18) of the inclined surface (6) is or with this extension of the longitudinal axis (18)

Includes angle β, which is in the range of 70 ° to 140 ° and wherein the wall section (17) serves as an impact surface and / or as a guide surface for the grit (1) flowing out from the inclined surface (6).

6. The device according to one or more of the preceding claims, characterized in that the length (19) of the

Section (17) of the wall (8) of the housing (4), which lies in the region of an imaginary extension of the longitudinal axis (18) of the inclined surface (6) downwards, is in the range of 0.1 m to 4 m.

7. The device according to one or more of the preceding claims, characterized in that at least the walls (8) of the housing (4) opposite the inclined surfaces (6) are angled, when viewed from the side, the upper part of each of these Walls have the same direction of inclination as the opposite and associated inclined surface (6), while the part (17) of the wall (8) of the housing (4) underneath has an opposite direction of inclination and the point of inflection (20) between the upper and the lower Part (17) of the respective angled wall (8) is arranged approximately at the height of the lower edge (7) of the respective opposite inclined surface (6) or at a distance (21) above the lower edge (7) of the opposite inclined surface (6) , which is in the range of 1.0 cm to 60.0 cm.

8. The device according to one or more of the preceding claims, characterized in that the spray devices (10) directed from above onto the inclined surfaces (6) or from above onto the downstream sections of the spreading material path between the respective inclined surface

(6) and the opposite wall (8) of the housing

(4) are provided.

9. The device according to one or more of the preceding claims, characterized in that the spray devices directed from below onto the areas (12) between the lower edges (7) of the inclined surfaces (6) and the walls (8) of the housing (4) opposite these (10) are provided completely or at least partially below the inclined surfaces (6).

10. The device according to one or more of the preceding claims, characterized in that each spray device (10) is connected to one or more pumps which the liquid medium to be sprayed at a pressure in the range from 0.1 bar to 80 bar provide.

11. The device according to one or more of the preceding claims, characterized in that each silo (3) has a funnel-shaped bottom, in which one or more closable emptying openings (5) are provided.

12. The device according to one or more of the preceding claims, characterized in that between the closure of the discharge opening (5) of the silo (3) and the upper edge (14) of the inclined surface (6) one or more Light, ultrasound or radio barriers are arranged which directly or indirectly control and / or regulate the dispensing of liquid by the spray devices (10) and / or the activity of the pump (s).

13. The device according to one or more of the preceding claims, characterized in that the housing (4) can be moved via rollers (15) and / or wheels which run on rails (16) below the silo (3), at least a part of the liquid supply line between the pumps and the spray devices (10) are tubular.

14. The device according to one or more of the preceding claims, characterized in that the emptying opening (5) of the silo (3) is designed in the manner of a fish mouth closure in the form of two blades, the lower edges of which lie against one another in the closed state.

15. The device according to one or more of the preceding claims, characterized in that it comprises two inclined surfaces (6) which are aligned with one another in accordance with a letter V or U standing on the head, four below the two inclined surfaces (6) there are nozzle-like spray devices (10), two of which are directed from below onto each of the two scattering material streams (11) flowing down from the inclined surfaces (6), and in front of the inside of the walls (8) of the housing opposite the inclined surfaces (6) 4) above or at the level of the inclined surfaces (6) there is a nozzle-like spray device (10) directed onto each inclined surface (6) from above.