Installation and method for preparing coated wooden material compression mouldings

Abstract

The invention relates to a plant (1) for processing coated wood-based molded bodies (100) into free-flowing particles comprising: a comminution device (2) for contact comminution of coated wood-based molded bodies (100) into wood-based molded body fragments containing coating and uncoated wood-based molded body fragments; a riser tube air classifier (3) for classifying into a defective fraction (31) with predominantly coated wood-based molded body fragments and a good fraction (32) with predominantly uncoated wood-based molded body fragments; a feeding device (4) for feeding the riser tube air classifier (3) with wood-based molded body fragments in a weight- and / or time-dependent manner.wherein the feed device (4) comprises a weighing device for gravimetrically determining the feed rate of the riser tube air classifier (3) per unit of time, wherein the riser tube air classifier (3) is downstream of the comminution device (2) and the feed device (4) is arranged between the riser tube air classifier (3) and the comminution device (2).

Description

[0001] The invention relates to a system, a riser tube classifier, as well as a method for processing, in particular reprocessing, coated wood-based molded bodies.

[0002] Numerous systems and processes for processing coated wood-based molded parts are known from the prior art. For example, in so-called wet processes, coated wood-based molded parts and / or fragments thereof are processed in an aqueous medium and / or with steam and / or pressure and / or temperature, in particular by being broken down.

[0003] Problematic aspects of the processes known from the state of the art, especially wet processes for the preparation of coated wood-based molded bodies, are usually complex and costly systems and processes, with coating components, especially binder components, such as aqueous phases contaminated with adhesives, with complex water circulation, elaborate chemical and cleaning processes and disposal problems.

[0004] The invention is therefore based on the objective of providing a system, a riser tube classifier, and a method for processing, in particular reprocessing, coated wood-based molded parts, especially for separating coated wood-based molded part fragments from uncoated wood-based molded part fragments. Furthermore, an alternative to wet processes is to be provided.

[0005] To solve the problem, the invention, according to a first embodiment, teaches a 1. Plant for processing, in particular reprocessing, coated wood-based molded bodies, for example with a moisture content according to DIN EN 322: Aug 1993, in the range of 1 to 100%, preferably in the range of 3 to 60%, particularly preferably in the range of 5 to 40%, most preferably in the range of 10 to 25%, into free-flowing particles, in particular fibrous material particles, comprising: a comminution device for the contact comminution of coated wood-based molded bodies into wood-based molded body fragments with coating-containing wood-based molded body fragments and coating-free wood-based molded body fragments; a riser tube air classifier for classification,in particular, separating the wood-based molded body fragments obtained from the comminution device into a bad fraction with predominantly coated wood-based molded body fragments and a good fraction with predominantly uncoated wood-based molded body fragments, a feed device for feeding the riser tube air classifier with wood-based molded body fragments, in particular from the comminution device, in a weight- and / or time-dependent manner, wherein the feed device comprises a weighing device for gravimetrically determining the feed rate of the riser tube air classifier per unit of time, wherein the riser tube air classifier is downstream of the comminution device and the feed device is arranged between the riser tube air classifier and the comminution device, in particular the comminution device is functionally connected to the feed device and the riser tube air classifier, for example fluidically,especially in terms of product flow technology.

[0006] Within the scope of the present invention, "wood-based material molded bodies" means molded bodies, in particular molded parts, such as molded plates made of materials, especially materials in the solid state, from which, for example, components and structures can be manufactured, wherein the material molded bodies comprise a fiber component, in particular a wood component, for example a wood chip component, a wood shaving component, a wood wool component, a wood fiber component, a C4 plant component, a CAM plant component or a combination thereof.For example, wood-based panel molded bodies are selected from a group of plywood, in particular according to DIN 68705 (DIN EN 636), particleboard, in particular according to DIN EN 309, according to DIN 68763 (DIN EN 312), wood fiberboard, in particular according to DIN 68754 (DIN EN 622), for example HDF boards (high-density fiberboard), MDF boards (medium-density fiberboard), ULDF boards (ultra-lightweight fiberboard), particleboard, in particular chipboard stripboard, OSB boards (oriented strand board), for example according to DIN EN 300, LSL board (chipboard stripboard), composite boards, in particular WPC boards (wood plastic composites), linoleum, lightweight boards, for example paper honeycomb boards, glued laminated timber, laminated veneer lumber or a combination thereof.

[0007] Within the scope of the present invention, CAM plant component is understood to mean a component of plants with a crassulacean acid metabolism.

[0008] Within the scope of the present invention, "coating," in particular "coating," refers to the application of a firmly adhering layer, especially of amorphous material, for example, a coating material, and in particular additionally with an adhesion promoter, to a surface of the wood-based molded body. For example, a coating material and / or adhesion promoter is selected from a group of resins, in particular condensation resins, for example, ammonium inoplastics, in particular melam in-formaldehyde resins, thermosetting plastics, in particular phenol-formaldehyde resins, or a combination thereof.

[0009] Within the scope of the present invention, a contact comminution device is understood to be a comminution device which is suitable for touching the material to be comminuted, in particular for being able to have contact with the material to be comminuted during the comminution process. For example, a contact comminution device may be selected from the group consisting of a hammer mill, in particular a vertical hammer mill, a horizontal hammer mill, a surface mill, a pin mill, an impact mill, in particular a double-stream mill, for example Pallmann type PSKM, Pallmann type PPSM, a percussion mill or a combination thereof.

[0010] A riser tube air classifier within the scope of the present invention is understood to be a classifier which, according to the basic principle of stream classification, uses a separation medium selected from a group of gases, gas mixtures, in particular air, fluids or a combination thereof.

[0011] In a riser-tube air classifier according to the invention, the particles to be classified are fed into a tube, in particular a riser tube, through which air flows from below, in particular from the ground. Particles that have a lower settling velocity than the classifying air velocity are discharged upwards, in particular against the direction of gravity, as fines, in particular good fraction; particles with a higher settling velocity pass through the classifier downwards, in particular in the direction of gravity, as coarses, in particular bad fraction.

[0012] According to the invention, a riser tube air classifier can, for example, be selected from a group consisting of a gravity classifier, in particular a circular classifier, a zigzag classifier, a floating classifier, a cascade classifier or a combination thereof.

[0013] Within the scope of the present invention, classification is understood to mean separation according to a separation criterion into at least two fractions, in particular into a good fraction and a bad fraction. According to the invention, air classification with a riser tube air classifier is understood to be a stream classification using air and / or other gases and / or gas mixtures and / or fluids or a combination thereof as the separation medium.

[0014] According to the invention, an entry device can, for example, be selected from a group consisting of a conveyor belt, in particular a conveyor belt scale, a transport belt, a weighing belt, a transport screw, in particular a weighing screw, a rotary valve or a combination thereof.

[0015] Advantages of the system according to the invention include its simplicity, in particular its low complexity, its small footprint, its environmental friendliness, especially its recyclability (e.g., processing, in particular reprocessing, of coated wood-based panel molded bodies, especially fiberboard panels), and its low energy consumption (especially due to the lack of additional complex equipment, in particular steam and / or water processing systems and / or chemical dosing systems, or a combination thereof). 2.Plant according to the first embodiment 1, wherein the plant additionally comprises a screening device, in particular a vibrating screen for sorting the wood-based material molded body fragments obtained from the comminution device into an oversize fraction, a feed fraction and a screen passage fraction, wherein the comminution device is connected upstream of the screening device, in particular upstream in the (process) flow direction, for example upstream in the (process) material flow direction, and the feed device for receiving the feed fraction is connected downstream of the screening device, in particular downstream in the (process) flow direction, for example downstream in the (process) material flow direction.

[0016] Within the scope of the invention, the terms "upstream" and "downstream" are to be understood as referring to the flow direction, in particular the process direction, for example the main process direction, especially the (good material) flow direction. 3. System according to one of the first embodiments 1 to 2, wherein the system additionally comprises a non-contact comminution device, wherein the non-contact comminution device is upstream of the comminution device for the contact comminution of coated wood-based molded bodies.

[0017] Within the scope of the present invention, a non-contact, and in particular non-contact, shredding device is understood to be a shredding device which does not touch the material to be shredded, in particular does not touch it mechanically, for example, has no contact with the material to be shredded. For example, a non-contact shredding device can be selected from a group consisting of a sonic shock wave shredder, in particular an EcoPulser, a wave vane shredder, or a combination thereof.

[0018] An advantage of the additional use of a non-contact comminution device according to the invention is that fiber components, in particular individual fibers, can be removed from wood-based molded bodies in a way that is as non-destructive as possible, ideally while maintaining fiber length and / or fiber quality, for example the strength potential. 4. Plant according to one of the first embodiments 1 to 3, wherein the riser pipe air classifier comprises: a riser pipe with a light material discharge opening for discharging the material fraction consisting predominantly of coating-free wood-based panel molded body fragments, an air inlet element with a converging side, in particular a converging side, and a diverging side, wherein the air inlet element is arranged with the converging side on the riser pipe, wherein the air inlet element comprises a coarse material discharge device for discharging the defective fraction consisting predominantly of coating-containing wood-based panel molded body fragments, in particular the coarse material discharge device sealing the air inlet element at the bottom, in particular closing it at the bottom, an air volume flow supply device for supplying the riser pipe with an air volume flow in the direction from the side facing away from the light material discharge opening to theThe side of the riser pipe facing the light material discharge opening, wherein the air volume flow supply device is functionally connected to the air inlet element and is designed such that the riser pipe can be supplied with the air volume flow uniformly from the side facing away from the light material discharge opening towards the side facing the light material discharge opening via the air inlet element; an inlet pipe for supplying the riser pipe air classifier, wherein the inlet pipe projects at least partially into the riser pipe on the side of the light material discharge opening. 5. System according to the first embodiment 4, wherein the air inlet element comprises air supply openings arranged circumferentially, in particular radially circumferentially, and wherein the air volume flow supply device is designed such that the riser pipe can be supplied with the air volume flow via the arranged air supply openings.

[0019] Within the scope of the present invention, the air supply openings are selected from the group of geometric shapes consisting of a circle, in particular an ellipse, a polygon, in particular a dodecagon, a hendecagon, a decagon, a nonagon, an octagon, a heptagon, a hexagon, a pentagon, a tetragon, a trigon or a combination thereof. 6. System according to one of the first embodiments 4 to 5, wherein the riser pipe, in the region of the feed pipe which projects at least partially into the riser pipe, at least partially comprises a conical section, wherein the conical section tapers, in particular conically, towards the light material discharge opening. 7. System according to the first embodiment 6, wherein the riser pipe, as a transition to the conical section, comprises a riser pipe expansion, in particular a radially circumferential riser pipe expansion.

[0020] Within the scope of the present invention, a riser pipe expansion is understood to mean an expansion of the riser pipe, in particular an enlargement, for example a bulging of the riser pipe. 8. System according to one of the first embodiments 4 to 7, wherein the riser pipe expansion has an inner cross-sectional area in the range of 1.01 to 2, preferably in the range of 1.05 to 1.7, particularly preferably in the range of 1.07 to 1.4, relative to the inner cross-sectional area of ​​the riser pipe. 9. System according to one of the first embodiments 4 to 8, wherein the air inlet element on the diverging side has an inner cross-sectional area in the range of 1.01 to 3, preferably in the range of 1.25 to 2.4, particularly preferably in the range of 1.35 to 1.8, relative to the inner cross-sectional area of ​​the riser pipe. 10. System according to one of the first embodiments 4 to 9, wherein the inlet pipe has an inner cross-sectional area in the range of 0.2 to 0.85, preferably in the range of 0.35 to 0.7, particularly preferably in the range of 0.45 to 0.6, relative to the inner cross-sectional area of ​​the riser pipe. 11.12. System according to one of the first embodiments 4 to 10, wherein the conical section together with the riser pipe expansion has a height in the range of 1.01 to 1.6, preferably in the range of 1.09 to 1.5, particularly preferably in the range of 1.10 to 1.25, based on the height of the riser pipe excluding the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element. 13. System according to one of the first embodiments 4 to 11, wherein the air inlet element has a height in the range of 0.2 to 0.7, preferably in the range of 0.25 to 0.65, particularly preferably in the range of 0.3 to 0.45, based on the height of the riser pipe excluding the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element.14. System according to one of the first embodiments 4 to 12, wherein the inlet pipe has a height in the range of 0.7 to 1, preferably in the range of 0.75 to 0.95, particularly preferably in the range of 0.8 to 0.9, based on the height of the conical section together with the riser pipe expansion. 15. System according to one of the first embodiments 4 to 13, wherein the inlet pipe has a height in the range of 1 to 1.15, preferably in the range of 1.001 to 1.10, particularly preferably in the range of 1.002 to 1.005, based on the height of the riser pipe excluding the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element.

[0021] The advantage of the cross-sectional and / or length ratios according to the invention is the formability, in particular the design, for example, of a suspended turbulence layer within the riser pipe, wherein the position, for example, the height within the riser pipe, is adjustable, in particular controllable, and thus the separation sharpness can be actively influenced, in particular optimally adjustable. 15. System according to one of the first embodiments 4 to 14, wherein the riser tube air classifier additionally comprises a funnel element with a wide end and a narrow end, wherein the funnel element is arranged between the air inlet element and the coarse material discharge device, wherein the wide end of the funnel element is connected to the diverging side of the air inlet element and the narrow end of the funnel element is connected to the coarse material discharge device. 16. System according to one of the first embodiments 1 to 15, wherein the system additionally comprises a moisture sensor unit for measuring the moisture content of the feed material, in particular the wood-based panel molding fragments, into the riser tube air classifier for additional moisture-dependent feeding of the riser tube air classifier with wood-based panel molding fragments.

[0022] According to the invention, a humidity sensor unit can, for example, be selected from a group consisting of a capacitive, a resistive, a dielectric, an infrared, a microwave humidity sensor unit, or a combination thereof. 17. System according to one of the first embodiments 1 to 16, wherein the system additionally comprises a dry separation table, in particular an air separation table, for receiving the material fraction from the riser tube air classifier, wherein the dry separation table is connected downstream of the riser tube air classifier.

[0023] A second embodiment of the invention relates to a 1. A riser pipe air classifier for classifying wood-based panel molding fragments into a defective fraction consisting predominantly of coated wood-based panel molding fragments and a good fraction consisting predominantly of uncoated wood-based panel molding fragments, comprising: a riser pipe with a light material discharge opening for discharging the good fraction consisting predominantly of uncoated wood-based panel molding fragments, an air inlet element with a tapered side and a diverging side, wherein the air inlet element is arranged with the tapered side on the riser pipe, wherein the air inlet element comprises a coarse material discharge device for discharging the defective fraction consisting predominantly of coated wood-based panel molding fragments, in particular the coarse material discharge device sealing the air inlet element at the bottom, in particular closing it at the bottom.An air volume flow supply device for supplying the riser pipe with an air volume flow in the direction from the side facing away from the light material discharge opening to the side of the riser pipe facing the light material discharge opening, wherein the air volume flow supply device is functionally connected to the air inlet element and is designed such that the riser pipe can be supplied with the air volume flow uniformly from the side facing away from the light material discharge opening to the side facing the light material discharge opening via the air inlet element; an inlet pipe for supplying the riser pipe air classifier, wherein the inlet pipe projects at least partially into the riser pipe on the side of the light material discharge opening.

[0024] Within the scope of the present invention, "wood-based material molded bodies" means molded bodies, in particular molded parts, such as molded plates made of materials, especially materials in the solid state, from which, for example, components and structures can be manufactured, wherein the material molded bodies comprise a fiber component, in particular a wood component, for example a wood chip component, a wood shaving component, a wood wool component, a wood fiber component, a C4 plant component, a CAM plant component or a combination thereof.For example, wood-based panel molded bodies are selected from a group of plywood, in particular according to DIN 68705 (DIN EN 636), particleboard, in particular according to DIN EN 309, according to DIN 68763 (DIN EN 312), wood fiberboard, in particular according to DIN 68754 (DIN EN 622), for example HDF boards (high-density fiberboard), MDF boards (medium-density fiberboard), ULDF boards (ultra-lightweight fiberboard), particleboard, in particular chipboard stripboard, OSB boards (oriented strand board), for example according to DIN EN 300, LSL board (chipboard stripboard), composite boards, in particular WPC boards (wood plastic composites), linoleum, lightweight boards, for example paper honeycomb boards, glued laminated timber, laminated veneer lumber or a combination thereof.

[0025] Within the scope of the present invention, CAM plant component is understood to mean a component of plants with a crassulacean acid metabolism.

[0026] Within the scope of the present invention, "coating," in particular "coating," refers to the application of a firmly adhering layer, especially of amorphous material, for example, a coating material, and in particular additionally with an adhesion promoter, to a surface of the wood-based molded body. For example, a coating material and / or adhesion promoter is selected from a group of resins, in particular condensation resins, for example, aminoplasts, in particular melamine-formaldehyde resins, thermosetting plastics, in particular phenol-formaldehyde resins, or a combination thereof.

[0027] A riser tube air classifier within the scope of the present invention is understood to be a classifier which, according to the basic principle of stream classification, uses a separation medium selected from a group of gases, gas mixtures, in particular air, fluids or a combination thereof.

[0028] In a riser-tube air classifier according to the invention, the particles to be classified are fed into a tube, in particular a riser tube, through which air flows from below, in particular from the ground. Particles with a lower settling velocity than the classifying air velocity are carried upwards, in particular against the direction of gravity, as fines, in particular good fraction; particles with a higher settling velocity pass through the classifier downwards, in particular in the direction of gravity, as coarses, in particular bad fraction.

[0029] According to the invention, a riser tube air classifier can, for example, be selected from a group consisting of a gravity classifier, in particular a circular classifier, a zigzag classifier, a floating classifier, a cascade classifier or a combination thereof.

[0030] Within the scope of the present invention, classification is understood to mean separation according to a separation criterion into at least two fractions, in particular into a good fraction and a bad fraction. According to the invention, air classification with a riser tube air classifier is understood to be a stream classification using air and / or other gases and / or gas mixtures and / or fluids or a combination thereof as the separation medium.

[0031] Advantages of the riser tube air classifier according to the invention include its simplicity, particularly its low complexity, its small footprint, its environmental friendliness, especially its recyclability, for example, the processing, and in particular the reprocessing, of coated wood-based panel products, especially fiberboards, and the possibility of optimally adjustable, and in particular controllable and / or high separation efficiency. 2. Riser tube air classifier according to the second embodiment 1, wherein the air inlet element comprises air supply openings arranged circumferentially, in particular radially, and wherein the air volume flow supply device is designed such that the riser tube can be supplied with the air volume flow via the arranged air supply openings.

[0032] Within the scope of the present invention, the air supply openings are selected from the group of geometric shapes consisting of a circle, in particular an ellipse, a polygon, in particular a dodecagon, a hendecagon, a decagon, a nonagon, an octagon, a heptagon, a hexagon, a pentagon, a tetragon, a trigon or a combination thereof. 3. Riser tube air classifier according to one of the second embodiments 1 to 2, wherein the riser tube, in the region of the feed tube which projects at least partially into the riser tube, at least partially comprises a conical section, wherein the conical section tapers, in particular conically, towards the light material discharge opening. 4. Riser tube air classifier according to the second embodiment 3, wherein the riser tube, as a transition to the conical section, comprises a riser tube expansion, in particular a radially circumferential riser tube expansion.

[0033] Within the scope of the present invention, a riser pipe expansion is understood to mean an expansion of the riser pipe, in particular an enlargement, for example a bulging of the riser pipe. 5. Riser tube air classifier according to one of the second embodiments 1 to 4, wherein the riser tube expansion has an inner cross-sectional area in the range of 1.01 to 2, preferably in the range of 1.05 to 1.7, particularly preferably in the range of 1.07 to 1.4, relative to the inner cross-sectional area of ​​the riser tube. 6. Riser tube air classifier according to one of the second embodiments 1 to 5, wherein the air inlet element on the diverging side has an inner cross-sectional area in the range of 1.01 to 3, preferably in the range of 1.25 to 2.4, particularly preferably in the range of 1.35 to 1.8, relative to the inner cross-sectional area of ​​the riser tube. 7. Riser tube air classifier according to one of the second embodiments 1 to 6, wherein the feed tube has an inner cross-sectional area in the range of 0.2 to 0.85, preferably in the range of 0.35 to 0.7, particularly preferably in the range of 0.45 to 0.6, based on the inner cross-sectional area of ​​the riser tube. 8.Riser tube air classifier according to one of the second embodiments 1 to 7, wherein the conical section together with the riser tube expansion has a height in the range of 1.01 to 1.6, preferably in the range of 1.09 to 1.5, particularly preferably in the range of 1.10 to 1.25, based on the height of the riser tube excluding the sum of the heights of the conical section together with the riser tube expansion and the air inlet element. 9. Riser tube air classifier according to one of the second embodiments 1 to 8, wherein the air inlet element has a height in the range of 0.2 to 0.7, preferably in the range of 0.25 to 0.65, particularly preferably in the range of 0.3 to 0.45, based on the height of the riser tube excluding the sum of the heights of the conical section together with the riser tube expansion and the air inlet element. 10.Riser tube air classifier according to one of the second embodiments 1 to 9, wherein the inlet tube has a height in the range of 0.7 to 1, preferably in the range of 0.75 to 0.95, particularly preferably in the range of 0.8 to 0.9, based on the height of the conical section together with the riser tube expansion. 11. Riser tube air classifier according to one of the second embodiments 1 to 10, wherein the inlet tube has a height in the range of 1 to 1.15, preferably in the range of 1.001 to 1.10, particularly preferably in the range of 1.002 to 1.005, based on the height of the riser tube excluding the sum of the heights of the conical section together with the riser tube expansion and the air inlet element.

[0034] An advantage of the cross-sectional and / or length ratios according to the invention is their configurability, in particular the ability to create, for example, a suspended turbulence layer within the riser pipe, wherein the position, for example, the height within the riser pipe, is adjustable, in particular controllable, and thus the separation efficiency can be actively influenced, in particular optimally adjusted. 12. Riser pipe air classifier according to one of the second embodiments 1 to 11, wherein the riser pipe air classifier additionally comprises a funnel element with a wide end and a narrow end, wherein the funnel element is arranged between the air inlet element and the coarse material discharge device, wherein the wide end of the funnel element is connected to the diverging side of the air inlet element and the narrow end of the funnel element is connected to the coarse material discharge device.

[0035] A third embodiment of the invention relates to a 1. A method for processing, in particular reprocessing, coated wood-based molded bodies, for example with a moisture content according to DIN EN 322: Aug 1993, in the range of 1 to 100%, preferably in the range of 3 to 60%, particularly preferably in the range of 5 to 40%, and most preferably in the range of 10 to 25%, into free-flowing particles, in particular fibrous material particles, comprising the steps of: a. Providing a coated wood-based molded body, in particular with a moisture content according to DIN EN 322: Aug 1993, in the range of 1 to 100%, preferably in the range of 3 to 60%, particularly preferably in the range of 5 to 40%, and most preferably in the range of 10 to 25%; b. Providing a plant for processing, in particular reprocessing, coated wood-based molded bodies according to one of the first embodiments 1 to 17; c.d. Comminution of the coated wood-based molded bodies provided in step a) using the comminution device provided in step b) and production of wood-based molded body fragments containing coating and uncoated wood-based molded body fragments; d. Supplying the riser pipe of the riser classifier provided in step b) with the air volume flow supplied via the air supply device; e.Feeding the inlet pipe of the riser classifier provided in step b) via the inlet device provided in step b) with the wood-based panel molding fragments produced in step c) and separating the wood-based panel molding fragments with the air volume flow provided in step d) into a defective fraction consisting predominantly of coated wood-based panel molding fragments and a good fraction consisting predominantly of uncoated wood-based panel molding fragments; f. Discharge of the good fraction separated in step d) via the light material discharge opening of the riser classifier provided in step b) and of the defective fraction separated in step d) via the coarse material discharge device of the riser classifier provided in step b). 2.A method for processing coated wood-based molded bodies, according to the third embodiment 1, wherein the feeding in step e) is carried out gravimetrically per unit of time using the weighing device of the feed device provided in step b), and the air volume flow is controlled accordingly. 3. A method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 2, wherein the application of the air volume flow provided in step b) is in the range of 500–20,000 m³ / h, preferably in the range of 700–8,000 m³ / h, particularly preferably in the range of 900–6,000 m³ / h, based on the feeding in step e) in the range of 1 to 1,000 kg / h. 4.Method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 3, wherein the application of the air volume flow provided in step b) is in the range of 3300 - 50000 m 3< / h, preferably in the range of 5000 - 40000 m 3< / h, particularly preferably in the range of 6000 - 30000 m 3< / h, based on the feeding in step e) in the range of 1000 to 5000 kg / h. 5. A method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 4, wherein the supply in step d) with the air volume flow provided in step b) is in the range of 6,000–80,000 m³ / h, preferably in the range of 12,500–70,000 m³ / h, particularly preferably in the range of 16,500–60,000 m³ / h, based on the feed rate in step e) in the range of 5,000–10,000 kg / h. 6.Method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 5, wherein the application in step d) with the air volume flow provided in step b) is in the range of 20000 - 110000 m 3< / h, preferably in the range of 27000 - 100000 m 3< / h, particularly preferably in the range of 33000 - 90000 m 3< / h, based on the feeding in step e) in the range of 10000 to 15000 kg / h. 7. A method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 6, wherein the application in step d) with the air volume flow provided in step b) is in the range of 30,000 to 220,000 m³ / h, preferably in the range of 40,000 to 200,000 m³ / h, particularly preferably in the range of 49,500 to 180,000 m³ / h, based on the feed rate in step e) in the range of 15,000 to 30,000 kg / h. 8.Method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 7, wherein the feeding in step e) is additionally carried out according to moisture per unit of time using the moisture sensor unit of the input device provided in step b), and the air volume flow is controlled accordingly.

[0036] Another embodiment of the invention relates to the use of a riser tube classifier, in particular according to one of the second embodiments 1 to 12, for separating wood-based molded body fragments produced from coated wood-based molded bodies into a bad fraction with predominantly coating-containing wood-based molded body fragments and a good fraction with predominantly coating-free wood-based molded body fragments.

[0037] The invention is explained in more detail below with reference to a drawing that illustrates only one embodiment. The drawing shows: Fig. 1 Schematic representation of a plant for processing coated wood-based molded bodies according to a first embodiment, Fig. 2 a side view of a riser tube air classifier from the plant to Fig. 1 , Fig. 3 a side view of a riser tube air classifier according to Fig. 2 with legend including length, height and cross-section.

[0038] In Fig. 1The inventive system 1 for processing coated wood-based molded bodies 100 is schematically depicted, comprising a comminution device 2 for the contact comminution of the coated wood-based molded bodies 100 into wood-based molded body fragments, a riser tube air classifier 3 for classifying the wood-based molded body fragments obtained from the comminution device 2 into a defective fraction 31 with predominantly coating-containing wood-based molded body fragments and a good fraction 32 with predominantly uncoated wood-based molded body fragments, and a feed device 4 for feeding the riser tube air classifier 3 with wood-based molded body fragments. The riser tube air classifier 3 is located downstream of the comminution device 2, and the feed device 4 is arranged between the riser tube air classifier 3 and the comminution device 2.As shown optionally with dash-dot lines are a screening device 5 for sorting the wood-based panel molding fragments obtained from the shredding device 2 into an oversize fraction 51, a feed fraction 52, and a screen passage fraction 53. The shredding device 2 is located upstream of the screening device 5, and the feed device 4 for receiving the feed fraction 52 is located downstream of the screening device 5. Additionally, a non-contact shredding device 6 for the contact shredding of coated wood-based panel moldings 100 is optionally located upstream of the shredding device 2. Furthermore, a dry separation table 17 for receiving the product fraction 32 from the riser tube air classifier 3 is optionally located downstream of the riser tube air classifier 3.

[0039] In Fig. 2The riser pipe air classifier 3 of Annex 1 is shown with a riser pipe 7, a light material discharge opening 8 for discharging the material fraction 32, and an air inlet element 10 with a converging side and a diverging side. The air inlet element 10 is arranged with its converging side against the riser pipe 7. The air inlet element 10 includes a coarse material discharge device 13 for discharging the reject fraction 31. The coarse material discharge device 13 seals the air inlet element 10 at its base. The air volume flow supply device 9 is functionally connected to an air inlet element 10 and is designed such that the riser pipe 7 can be supplied with an air volume flow 11 uniformly from the side facing away from the light material discharge opening 8 via the air inlet element 10 in the direction of the side of the riser pipe 7 facing the light material discharge opening 8.On the side of the light material discharge opening 8, an inlet pipe 12 projects at least partially into the riser pipe 7. Air supply openings 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216 are arranged circumferentially, particularly radially, on the air inlet element 10. The air volume flow supply device 9 is designed such that the riser pipe 7 can be supplied with the air volume flow 11 via the arranged air supply openings 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216. In the area of ​​the inlet pipe 12, which projects at least partially into the riser pipe 7, the riser pipe 7 has at least a partially conical section 14, wherein the conical section 14 tapers towards the light material discharge opening 8. A riser pipe expansion 15 is arranged as the transition from the riser pipe 7 to the conical section 14.

[0040] Between the air inlet element 10 and the coarse material discharge device 13, a funnel element 16 with a wide end and a narrow end is additionally arranged. The wide end of the funnel element 16 is connected to the diverging side of the air inlet element 10, and the narrow end of the funnel element 16 is connected to the coarse material discharge device 13. Reference symbol list:

[0041] 1 = Plant (for processing coated wood-based material molded bodies) 2 = Shredding device 3 = Riser pipe air classifier 4 = Feeding device 5 = Screening device 6 = Non-contact shredding device 7 = Riser pipe 8 = Light material discharge opening 9 = Airflow supply device 10 = Air inlet element 11 = Air volume flow 12 = Feed pipe 13 = Coarse material discharge device (rotary valve) 14 = Conical section 15 = Riser pipe expansion 16 = Hopper element 17 = Dry separation table 31 = Bad fraction 32 = Good fraction 51 = Oversize fraction 52 = Feed fraction 53 = Sieve pass fraction 100 = Wood-based material molded body _._ = Dash-dot line(s) for optional elements - - - = Dashed line(s) as dimension line boundary ... = Dotted line(s) for air volume flow Q Rise = Internal cross-sectional area of ​​the riser pipe Q Wide = Internal cross-sectional area of ​​the riser pipe expansion Q Air inlet element = Internal cross-sectional area of ​​the diverging side of the air inlet element Q In = Internal cross-sectional area of ​​the inlet pipe L Rise = Height of the riser pipe excluding the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element L Out = Height of the conical section together with the riser pipe expansion of the riser pipe L Air inlet element = Height of the air inlet element L In = Height of the inlet pipe

Claims

1. Plant (1) for processing coated wood-based molded bodies (100) into free-flowing particles comprising: a comminution device (2) for the contact comminution of coated wood-based molded bodies (100) into wood-based molded body fragments containing coating and uncoated wood-based molded body fragments; a riser tube air classifier (3) for classifying into a defective fraction (31) with predominantly coated wood-based molded body fragments and a good fraction (32) with predominantly uncoated wood-based molded body fragments; a feeding device (4) for feeding the riser tube air classifier (3) with wood-based molded body fragments in a weight- and / or time-dependent manner, wherein the feeding device (4) comprises a weighing device for gravimetrically determining the feed rate of the riser tube air classifier (3) per unit of time.wherein the riser tube air classifier (3) is downstream of the comminution device (2) and the feed device (4) is arranged between the riser tube air classifier (3) and the comminution device (2).

2. Annex (1) according to claim 1, characterized by the fact that The system (1) additionally comprises a screening device (5) for sorting the wood-based material molded body fragments obtained from the comminution device (2) into an oversize fraction (51), a feed fraction (52) and a screen passage fraction (53), wherein the comminution device (2) is upstream of the screening device (5) and the feed device (4) for receiving the feed fraction (52) is downstream of the screening device (5).

3. Appendix (1) according to one of claims 1 to 2, characterized by the fact thatthe system (1) additionally comprises a non-contact comminution device (6), wherein the non-contact comminution device (6) is positioned upstream of the comminution device (2) for the contact comminution of coated wood-based molded bodies (100).

4. Appendix (1) according to any one of claims 1 to 3, characterized by the fact thatThe riser pipe air classifier (3) comprises: a riser pipe (7) with a light material discharge opening (8) for discharging the good fraction (32) consisting predominantly of uncoated wood-based panel molded body fragments, an air inlet element (10) with a converging side and a diverging side, wherein the air inlet element (10) is arranged with its converging side on the riser pipe (7), wherein the air inlet element (10) comprises a coarse material discharge device (13) for discharging the defective fraction (31) consisting predominantly of coated wood-based panel molded body fragments, an air volume flow supply device (9) for supplying the riser pipe (7) with an air volume flow (11) in the direction from the side facing away from the light material discharge opening (8) to the side of the riser pipe (7) facing the light material discharge opening (8),wherein the air volume flow supply device (9) is functionally connected to the air inlet element (10) and is designed such that the riser pipe (7) can be supplied with the air volume flow (11) uniformly from the side facing away from the light material discharge opening (8) via the air inlet element (10) in the direction of the side facing the light material discharge opening (8), an inlet pipe (12) for supplying the riser pipe air classifier (3), wherein the inlet pipe (12) projects at least partially into the riser pipe (7) on the side of the light material discharge opening (8).

5. Annex (1) according to claim 4, characterized by the fact thatthe air inlet element (10) comprises circumferentially arranged air supply openings (200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216) and wherein the air volume flow supply device (9) is designed such that the riser pipe (7) can be supplied with the air volume flow (11) via the arranged air supply openings (200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216).

6. Appendix (1) according to one of claims 4 to 5, characterized by the fact that the riser pipe (7) in the area of ​​the inlet pipe (12) which projects at least partially into the riser pipe (7) comprises at least a conical area (14), wherein the conical area (14) tapers towards the light material discharge opening (8).

7. Appendix (1) according to any one of claims 4 to 6, characterized by the fact that the riser pipe diameter (15) an internal cross-sectional area (Q Weit) in the range of 1.01 to 2, preferably in the range of 1.05 to 1.7, particularly preferably in the range of 1.07 to 1.4 based on the internal cross-sectional area (Q Steig ) of the riser pipe (7).

8. Appendix (1) according to any one of claims 4 to 7, characterized by the fact that the air inlet element (10) on the diverging side has an internal cross-sectional area (Q) Lufteinströmelement ) in the range of 1.01 to 3, preferably in the range of 1.25 to 2.4, particularly preferably in the range of 1.35 to 1.8 based on the internal cross-sectional area (Q Steig ) of the riser pipe (7).

9. Appendix (1) according to any one of claims 4 to 8, characterized by the fact that the conical section (14) together with the riser tube expansion (15) of the riser tube (7) a height (L Aus ) in the range of 1.01 to 1.6, preferably in the range of 1.09 to 1.5, particularly preferably in the range of 1.10 to 1.25 with respect to the height (L Steig) of the riser pipe without the sum of the heights of the conical area (14) together with the riser pipe enlargement (15) and the air inlet element (10).

10. Riser tube air classifier (3) for classifying wood-based panel molding fragments into a defective fraction (31) with predominantly coating-containing wood-based panel molding fragments and a good fraction (32) with predominantly uncoated wood-based panel molding fragments, comprising: a riser tube (7) with a light material discharge opening (8) for discharging the good fraction (32) with predominantly uncoated wood-based panel molding fragments, an air inlet element (10) with a converging side and a diverging side, wherein the air inlet element (10) is arranged with the converging side on the riser tube (7), wherein the air inlet element (10) comprises a coarse material discharge device (13) for discharging the defective fraction (31) with predominantly coating-containing wood-based panel molding fragments,An air volume flow supply device (9) for supplying the riser pipe (7) with an air volume flow (11) in the direction from the side facing away from the light material discharge opening (8) to the side of the riser pipe (7) facing the light material discharge opening (8), wherein the air volume flow supply device (9) is functionally connected to the air inlet element (10) and is designed such that the riser pipe (7) can be supplied with the air volume flow (11) uniformly from the side facing away from the light material discharge opening (8) to the side facing the light material discharge opening (8) via the air inlet element (10), an inlet pipe (12) for supplying the riser pipe air classifier (3), wherein the inlet pipe (12) projects at least partially into the riser pipe (7) on the side of the light material discharge opening (8).

11. A method for processing coated wood-based molded bodies (100) into free-flowing particles, comprising the steps of: a) providing a coated wood-based molded body (100); b) providing a system (1) for processing coated wood-based molded bodies according to any one of claims 1 to 9; c) comminution of the coated wood-based molded bodies (100) provided in step a) with the comminution device (2, 6) provided in step b) and production of wood-based molded body fragments with coating-containing wood-based molded body fragments and coating-free wood-based molded body fragments; d) supplying the riser tube (7) of the riser tube classifier (3) provided in step b) with the air volume flow (10) provided via the air supply device (9);e) Feeding the feed tube (11) of the riser classifier (3) provided in step b) via the feed device (4) provided in step b) with the wood-based panel molding fragments produced in step c) and separating the wood-based panel molding fragments with the air volume flow (10) provided in step d) into a defective fraction (31) with predominantly coated wood-based panel molding fragments and a good fraction (32) with predominantly uncoated wood-based panel molding fragments; f) Discharge of the good fraction (32) separated in step d) via the light material discharge opening (8) of the riser classifier (3) provided in step b) and of the defective fraction (31) separated in step d) via the coarse material discharge device (13) of the riser classifier (3) provided in step b).

12. Method for preparing coated wood-based molded bodies (100), according to claim 11, characterized by the fact that The feeding in step e) is carried out gravimetrically per unit of time using the weighing device of the input device (4) provided in step b) and the air volume flow (10) is controlled depending on this.

13. Method for processing coated wood-based molded bodies (100), according to one of claims 11 to 12, characterized by the fact that the application of the air volume flow (10) provided in step b) in the range of 3300 - 50000 m³ 3 / h, preferably in the range of 5000 - 40000 m 3 / h, especially preferred in the range of 6000 - 30000 m 3 / h, based on the feed rate in step e) in the range of 1000 to 5000 kg / h.

14. Method for processing coated wood-based molded bodies (100), according to one of claims 11 to 13, characterized by the fact that the application in step d) with the air volume flow (10) provided in step b) in the range of 6000 - 80000 m3 / h, preferably in the range of 12,500 - 70,000 m 3 / h, especially preferred in the range of 16500 - 60000 m 3 / h, based on the feed in step e) in the range of 5000 to 10000 kg / h.

15. Use of a riser tube classifier (3) for separating wood-based molded body fragments (100) produced from coated wood-based molded bodies into a bad fraction (31) with predominantly coated wood-based molded body fragments and a good fraction (32) with predominantly uncoated wood-based molded body fragments.

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