IMPACT REACTOR FOR COMMINUTING COMPOSITE MATERIAL AND METHOD FOR COMMINUTING COMPOSITE MATERIAL

Abstract

Impact reactor (1) for comminuting composite materials, comprising a cylindrical casing (2), in which a rotor (3) is arranged, and an introducing opening (9) for introducing the composite materials and an extraction opening (8) for discharging the comminuted composite materials, wherein at least one further introducing opening (10) for a cooling medium is provided.

Claims

1. An impact reactor for comminuting composite materials, comprising a cylindrical casing in which a rotor is arranged, and an introducing opening for introducing the composite materials and an extraction opening for discharging the comminuted composite materials, characterized in that at least one further introducing opening for a cooling medium is provided.

2. The impact reactor according to claim 1, wherein the cooling medium includes water.

3. The impact reactor according to claim 2, wherein the cooling medium includes an additive.

4. The impact reactor according to claim 1, wherein the cooling medium includes dry ice and/or liquid nitrogen.

5. The impact reactor according to claim 1, wherein a classifying device is assigned to the extraction opening.

6. The impact reactor according to claim 1, wherein the impact reactor comprises a cover which, together with the casing, delimits an impact reactor chamber.

7. The impact reactor according to claim 6, wherein the further introducing opening is assigned to the casing and/or to the cover.

8. A method for comminuting composite materials in an impact reactor, in which composite materials are introduced into an impact reactor chamber via an introducing opening, are comminuted in the impact reactor chamber under the effect of the rotor and are discharged from the impact reactor chamber via an extraction opening, characterized in that a cooling medium is introduced into the impact reactor chamber together with the composite materials.

9. The method according to claim 8, wherein the comminuted composite materials are extracted from the impact reactor chamber continuously.

10. The method according to claim 8, wherein classification takes place after extraction of the comminuted composite materials.

11. The impact reactor according to claim 2, wherein the cooling medium includes dry ice and/or liquid nitrogen.

12. The impact reactor according to claim 3, wherein the cooling medium includes dry ice and/or liquid nitrogen.

13. The impact reactor according to claim 2, wherein a classifying device is assigned to the extraction opening.

14. The impact reactor according to claim 3, wherein a classifying device is assigned to the extraction opening.

15. The impact reactor according to claim 4, wherein a classifying device is assigned to the extraction opening.

16. The impact reactor according to claim 2, wherein the impact reactor comprises a cover which, together with the casing, delimits an impact reactor chamber.

17. The impact reactor according to claim 3, wherein the impact reactor comprises a cover which, together with the casing, delimits an impact reactor chamber.

18. The impact reactor according to claim 4, wherein the impact reactor comprises a cover which, together with the casing, delimits an impact reactor chamber.

19. The impact reactor according to claim 5, wherein the impact reactor comprises a cover which, together with the casing, delimits an impact reactor chamber.

20. The method according to claim 9, wherein classification takes place after extraction of the comminuted composite materials.

Description

[0023] By use of the inventive method, in particular the use of water as the cooling medium and the short dwell time of the composite materials of a few seconds in the impact reactor chamber, it is ensured that the composite materials are merely separated into their individual components. Classification can take place after the extraction of the comminuted composite materials. The classification means can be formed e.g. in the form of an air separator or in the form of a screen. For film-containing composite materials, the use of an air separator has proved to be advantageous and very effective.

[0024] FIG. 1 schematically shows an embodiment of the inventive impact reactor.

[0025] FIG. 1 shows an impact reactor 1 or an impact reactor arrangement for comminuting composite materials. The impact reactor 1 comprises a cylindrical casing 2 consisting of metallic material. A rotor 3 which is provided with impact elements 5 is arranged in the interior of the casing 2 in the bottom area. The rotor 3 is operatively connected to an electric motor 6 which is arranged outside the casing 2. The shaft connecting the rotor 3 to the electric motor 6 extends in the axial direction of the cylindrical casing 2. The rotor 3 is provided with blades 4 which protrude radially from the shaft. Impact elements 5 are arranged at the ends of the free blades 4. The impact elements 5 are interchangeably fastened to the blades 4.

[0026] The impact reactor 1 is closed, at the end face facing away from the rotor, by means of a cover 7. The casing 2 comprising an introducing opening 9 for introducing the composite materials. In the region of the rotor 3, the casing 2 further comprises an extraction opening 8 for discharging the comminuted composite materials. A further introducing opening 10 for a cooling medium is integrated into the cover 7. In the present embodiment, the further introducing opening 10 is formed as a pipe connection, through which water can be led into the impact reactor chamber delimited by the casing 2 and the cover 7.

[0027] A classifying device 11 in the form of an air separator is assigned to the extraction opening 8.

[0028] The composite materials are introduced into the impact reactor chamber via the introducing opening 9 for comminuting. Furthermore, a cooling medium is introduced into the impact reactor via the further introducing opening 10. The composite materials are comminuted under the effect of the rotor 3 provided with the impact elements 5 and under the effect of the cooling medium, and are ultimately discharged from the impact reactor chamber via the extraction opening 8. Classification by means of an air separator takes place after the extraction of the comminuted composite materials. In the present embodiment, the comminuted composite materials are extracted from the impact reactor chamber continuously. However, the device is also suitable for batch-wise operation.