TREATMENT DEVICE AND METHOD FOR REMOVING COATINGS

Abstract

The invention relates to a treatment device and a method for removing coatings, comprising a vibratory conveyor with a conveying channel, which is designed in the manner of a trough, in order to form a treatment bath with a liquid decoating medium, comprising an inlet end and an outlet end for bulk material, wherein the conveying direction of the conveying channel runs from the inlet end to the outlet end. The conveying channel has below the surface of the treatment bath at least one feeding device and at least one discharging device for the decoating medium.

Claims

1. A treatment apparatus for removing coatings, having a vibratory conveyor with a conveyor channel which is of trough-like configuration, in order to configure a treatment bath with a liquid decoating medium, having an inlet end and having an outlet end for bulk material, the conveying direction of the conveyor channel running from the inlet end to the outlet end, characterized in that the conveyor channel has at least one feeding device and, below the surface of the treatment bath, at least one discharging device for the decoating medium.

2. The treatment apparatus as claimed in claim 1, characterized in that the at least one feeding device is arranged at the inlet end for bulk material.

3. The treatment apparatus as claimed in claim 1, characterized in that the at least one discharging device is arranged at the inlet end for bulk material.

4. The treatment apparatus as claimed in claim 1, characterized in that the at least one feeding device and the at least one discharging device are arranged transversely with respect to the conveying direction so as to lie opposite one another and between the inlet end and the outlet end for bulk material.

5. The treatment apparatus as claimed in claim 1, characterized in that the bottom of the conveyor channel runs horizontally.

6. The treatment apparatus as claimed in claim 1, characterized in that the bottom of the conveyor channel runs in an inclined manner at least in sections in the conveying direction.

7. The treatment apparatus as claimed in claim 6, characterized in that the bottom of the conveyor channel runs so as to rise or fall in the conveying direction from the inlet end to the outlet end.

8. The treatment apparatus as claimed in claim 7, characterized in that the bottom of the conveyor channel runs so as to rise or fall with an inclination of from 3 to 10 in the conveying direction from the inlet end to the outlet end.

9. The treatment apparatus as claimed in claim 1, characterized in that the bottom of the conveyor channel has elevations at least in sections.

10. The treatment apparatus as claimed in claim 1, characterized in that the bottom of the conveyor channel is configured in a double-walled manner and as a flow duct for the decoating medium with passage openings into the treatment bath.

11. The treatment apparatus as claimed in claim 1, characterized in that the bottom of the conveyor channel has grooves.

12. The treatment apparatus as claimed in claim 1, characterized in that the feeding device or the discharging device is arranged on the vibratory conveyor at the lowest point of the treatment bath.

13. The treatment apparatus as claimed in claim 1, characterized in that the treatment bath is of liquid-tight and/or gas-tight configuration.

14. The treatment apparatus as claimed in claim 1, characterized in that a cleaning device is arranged in the region of the conveyor channel.

15. A method for removing coatings by means of a treatment apparatus as claimed in claim 1, characterized by the following steps which follow one another: the bulk material is introduced via the inlet end of the conveyor channel into a treatment bath with decoating medium, the bulk material is conveyed in the conveyor channel along the conveying direction to the outlet end, the treated bulk material is removed at the outlet end.

Description

[0037] Parts which correspond to one another are provided with the same designations in all the figures.

[0038] FIG. 1 shows a treatment apparatus 1 for removing coatings, having a vibratory conveyor 2 with a conveyor channel 3 which is of trough-like configuration, in order to configure a treatment bath 4 with a liquid decoating medium 41. Coated bulk material 20 of the plant is fed from a storage container 51 and is discharged via a conveyor device 61 via the inlet end 5 and the outlet end 6, respectively. The conveying direction R of the conveying channel 3 runs from the inlet end 5 toward the outlet end 6. The conveyor channel 3 has at least one feeding device 7 and at least one discharging device 8 for the decoating medium 41 below the surface 42 of the treatment bath 4.

[0039] Dissolved substances are discharged for reprocessing from the treatment bath 4 by way of a flow of the decoating medium 41. Via the discharging device 8, a certain proportion of the decoating medium 41 is conveyed via a pumping device 10 into a reprocessing device 9. In the reprocessing device 9, the dissolved coating material can be deposited again, for example, by way of chemical processes. In the further course, the reprocessed decoating medium 41 is fed via the feeding device 7 to the treatment bath 4 for removing coatings.

[0040] The feeding device 7 and the discharging device 8 are preferably attached by way of an elastic hose or a tube with an elastic connector to the conveyor channel 3, which is intended to prevent a transmission of the vibrations during operation of the plant.

[0041] The bottom 31 of the conveyor channel 3 is configured in a double-walled manner and as a flow duct 35 for the decoating medium 41 with passage openings 36 into the treatment bath 4. As a consequence, the flow duct 35 runs below the bulk material to be transported. Via passage openings 36, the decoating medium 41 passes from below into the treatment bath 4 which is situated above, as a result of which the bottom side of the bulk material is first of all also flowed around, which bottom side can usually be reached with relative difficulty. The part of the wall having passage openings 36 is configured as a perforated plate.

[0042] The conveyor channel 3 of the vibratory conveyor 2 is set vibrating by way of a vibratory device 32 during operation of the plant as a mechanical conveying unit for bulk materials. The vibratory drive 33 moves the conveyor channel 3 obliquely upward in the conveying direction R and back for transporting purposes, as a result of which the movement comprises a vertical component and a horizontal component in the conveying direction R. The material to be conveyed which is introduced into the conveyor channel 3 at the inlet end 5 is moved step by step in the direction of the outlet end 6 by way of the vibratory operation. The elastic suspension 34 makes the vibratory movement of the conveyor channel 3 relative to the underlying surface possible. The vibration is set with regard to the frequency, the pulse and the angle. Furthermore, the treatment apparatus 1 has a cleaning device 37 which is installed in a cover element 38 in the upper part of the plant.

[0043] FIG. 2 shows a diagrammatic illustration of a further embodiment of a treatment apparatus 1 having an inclined conveyor channel 3. The bottom 31 of the conveyor channel 3 runs in a rising manner in the conveying direction R from the inlet end 5 to the outlet end 6. As a result, the decoating medium 41 collects in the treatment bath 4 at the inlet end 5, and the outlet end 6 of the bottom 31 of the conveyor channel 3 is raised above the bath level 42. Therefore, during operation of the plant, the bulk material 20 can be introduced from the storage container 51 into the conveyor channel 3 at the outlet end 6, and can fall into a collecting container 62 via the open outlet end 6. In this case, the feeding device 7 is arranged at the inlet end 5 for bulk material 20. The discharging device 8 is arranged at a point between the inlet end 5 and the outlet end 6. For the sake of clarity, FIG. 2 does not show the reprocessing device and the pumping device in further detail.

[0044] FIG. 3 shows a diagrammatic illustration of a further embodiment of a treatment apparatus 1 having an inclined conveyor channel 3. The bottom 31 of the conveyor channel 3 runs in a falling manner in the conveying direction R from the inlet end 5 to the outlet end 6. As a result, the decoating medium 41 collects in the treatment bath 4 at the outlet end 6, and the inlet end 5 of the bottom 31 of the conveyor channel 3 is raised above the bath level 42.

[0045] Coated bulk material 20 of the plant is fed from a storage container 51 and is discharged via a conveying device 61 via the inlet end 5 and the outlet end 6, respectively. The conveyor channel 3 has a feeding device 7 above the surface 42 of the treatment bath 4, and has a discharging device 8 for the decoating medium 41 below the surface 42 of the treatment bath 4. In this case, the discharging device 8 is arranged at the outlet end 6 for bulk material 20. For the sake of clarity, the reprocessing device and the pumping device are once again not shown in further detail in FIG. 3.

List of Designations

[0046] 1 Treatment apparatus [0047] 2 Vibratory conveyor [0048] 3 Conveyor channel [0049] 31 Bottom [0050] 32 Vibratory device [0051] 33 Vibratory drive [0052] 34 Elastic suspension [0053] 35 Flow duct [0054] 36 Passage openings [0055] 37 Cleaning device [0056] 38 Cover element [0057] 4 Treatment bath [0058] 41 Decoating medium [0059] 42 Surface of the treatment bath; bath level [0060] 5 Inlet end [0061] 51 Storage container [0062] 6 Outlet end [0063] 61 Conveyor device [0064] 62 Collecting container [0065] 7 Feeding device for decoating medium [0066] 8 Discharging device for decoating medium [0067] 9 Reprocessing device [0068] 10 Pumping device [0069] 20 Bulk material [0070] R Conveying direction