DE3515536A1 - Process and device for processing plastics wastes - Google Patents

Abstract

The present invention relates to a process for processing plastics wastes, in particular for film materials supplied in the form of bales, to obtain highly pure plastic which can be used as raw material. The waste material is coarsely pre-comminuted, preferably with a defined particle size, floated into a liquid and the liquid greatly accelerated relative to the waste material, the material is thereby separated and washed and subsequently led into a calming zone, non-floatable contaminants are separated off by sedimentation and remaining non-floatable and floatable contaminants having a particle size smaller than that of the material to be cleaned are conveyed via preferably horizontally arranged screening pipe sections into separate liquid tanks from which the material is floated out by the feeding of liquid, the contaminants are removed through the screen openings and the material is conveyed further, discharged and dewatered. <IMAGE>

Description

Method and device

for the processing of plastic waste The invention relates to a process for the processing of plastic waste for the recovery of as Raw material usable, high-purity plastic, and a device for implementation of the procedure.

It is known to recover plastic from waste material, which then further processed as a raw material, and in particular re-granulated, extruded, etc. can be. A high degree of purity of the plastic is required for this, as even the smallest impurities affect the mechanical properties of products, that are made from the recycled plastic have a strong negative impact.

The object of the invention is to provide a method and a device, through which you can produce plastic of a very high degree of purity with little effort and high output can recover, even from heavily soiled, hygienically not harmless Starting material such as

Agricultural films.

To solve this problem it is proposed that the starting substance forming waste, mostly delivered in pressed form, in a defined particle size or to crush the grain size and subject it to a washing process in several successive stages expires.

In the input washing stage, the shredded waste material is with a Flood of liquid washed in. The mixture obtained is then subjected at the same time a sharp deflection and an acceleration in terms of amount, and directs it then into a calming zone, from which an output is then sent to the post-cleaning stage he follows.

The chopped up is crushed by being washed in by a surge of liquid Waste goods separated effectively.

The subsequent redirection and acceleration separates impurities, and especially heavy components, in an effective manner. As far as they are not already were previously washed away, the heavy components in the calming zone sediment and be drawn off in a suitable manner.

For deflecting and accelerating the waste material washed into the liquid A rotary washer is preferably used, which has a rotating disk and an axial one has spaced stationary disc therefrom. The stationary disc is with a provided central opening through which the rotating disk flows axially will. The material hitting the rotating disk is deflected by axial in radial direction, and at the same time an angular acceleration is applied to the flowing mixture awarded. The particles of the material passing through between the disks become subjected to strong friction on each other and on the discs, which the Purification promotes. Impurities that have a different specific gravity as the plastic to be extracted, are based on the principle of Inertial and centrifugal separation and separated by the continuously flowing A surge of liquid washed away.

In order to keep this combined cleaning action as long as possible subject, it is advisable for the solid ingredients to stay for a certain period of time to take care of in the rotary washer. The defined grain size is helpful for this, in which the material was initially crushed. One can be rotating and / or stationary Give the rotary washer disk a structured surface that is in their roughness is adapted to the grain size of the waste material so that it is retained is, while the a much smaller grain size (pointing impurities be washed away quickly.

A correspondingly rough surface can, for example, by a Toothing, attached strips or the like can be formed on the face of the disc.

It is a general concept of the invention that is introduced by comminution of the waste well preserved grain size during the washing process essentially unchanged to leave, so that one in the pre-wash and post-wash cycle on a different one Grit can turn off plastic and contaminants, the grit being so is chosen so that it is significantly larger than the commonly occurring impurities is.

According to the invention, this prewash stage is followed by a post-wash stage.

While it is with the prewash stage and the associated calming zone it is only possible to separate non-buoyant impurities from one another, it is also possible for the first time with the post-wash stage to reliably float contaminants to be deposited.

Due to the mechanical processing of the material in the prewash zone, the foreign components adhering to the plastic have largely been removed. The mixture leaving the calming zone is fed to a sieve tube in which it is conveyed lengthways with the help of paddles. Hit these paddles the mixture with mechanical energy and dissolve the rest by generating friction Impurities.

The total amount of impurities is significantly smaller than the coarsely shredded plastic material and pass through the sieve openings outside, whereby liquid can be added at the same time.

According to the invention, the mixture arrives in a liquid container, which protrude slightly into the sieve tube or also reach through its walls.

The paddles rotating around the longitudinal axis of the pipe convey the material into the (or the) liquid container, in which the high Relative speeds a particle separation takes place.

More water is added to the entire system than through the Container bottoms is discharged, in particular liquid is supplied in such a way that it runs over the edges of the container and washes out material. This also gets Adequate buoyant material sporadically to the safety holes and can leave the inside of the pipe together with the liquid.

The invention is illustrated below with reference to in the drawings Embodiments explained in more detail.

Partially schematically show: FIG. 1 a processing plant of plastic waste with a shredding device, a rotary washer and a post-cleaning device; 2 shows a second possible design of the shredding device; 3 shows a detail of the rotary washer in longitudinal section; 4 shows the side view the post-cleaning device in longitudinal section; Fig. 5 is a cross section through the Post-cleaning device according to V - V of Fig. 4.

Referring to Fig. 1, the waste to be processed is in larger Containers 10 delivered on an inclined conveyor belt 12. The container 10 can it is a question of foil packets, for example agricultural foils, packaging foils or similar, in particular made of polyethylene (PE). The containers 10 pass through metal detector located above inclined conveyor belt 12, e.g.

in the form of an induction bridge 14 to advance metallic components to recognize and to be eliminated. Then the structures 10 fall into the shaft 16 of a Shredding device 18.

The shredding device 18 has a housing and a housing that is longitudinally movable thereon arranged ram 20. The ram 20 is driven by a motor, e.g. or pneumatic working cylinder 22, driven. The stamp 20 works against a die 24 which is oriented transversely to its direction of advance. The area of the punch 20 essentially coincides with that of the die 24. The die 24 has a perforated grid through which the container 10 is pushed through to it to shred. In particular, the die 24 can be very stable, possibly with cutting provided mesh grid be formed. The mesh size is typically on the order of 8 x 8cm to 10 x 10cm.

As FIG. 1 shows, the punch 20 can be inserted into the housing of the comminuting device 18 are moved back so that a collecting space 26 located in front of the die 24 is released, in which the shaft t6 opens. As soon as the collecting space 26 with Has filled well, the punch 20 is set in motion, with one not at the same time Lock shown in more detail can be effective, which prevents further goods falls into the collecting space 26.

The punch 20 pushes through the material lying in front of its end face the die 24. It is guided in the end of its stroke in a pipe socket 28, at the output of which the die 24 is located. When the hub ends, the The punch 20 is retracted and the one lying in the shaft 16, for example The lock is opened again, whereupon the shredding process is repeated.

Other shredding devices can also be used, in order to obtain waste in a well-defined grain size. Fig. 2 shows by way of example a shredding device with mutually rotating, engaging Rollers 32, 34. One roller 32 fulfills the function of a die. Your coat is provided with openings 36 through which the material to be shredded is pressed will. For this there are knobs 38 on the circumference of the other roller 34 formed, which engage in the openings 36 to fit. The one to be shredded Well is given from above in the direction of arrow 40 between the rollers 32, 34 and removed from the interior 42 of the roller 32 after passing through the perforations 36.

Returning to Fig. 1, the comminuted material collects in the Bunker 30, in which water can also be added. It will then guided obliquely upward by means of a conveyor belt 44 to a station 46 at which washing into a strong surge of liquid occurs. Station 46 has a housing, below the bottom 48 of which there is a water tank on the inlet side 50 is located. The water tank 50 is via a line 52 in which a valve 54 is supplied with water. It has a certain axial length and opens afterwards at the top with a wide gap towards the bottom 48.

The water emerges in a wave-like, strong current from the Water tank 50 and flows along the bottom 48, which is inclined at an angle. The conveyor belt 44 ends above and at a distance from the water tank 50, so that from which falling material ends up in the surge of water.

The waste material is washed under with a strong current and in isolated in an effective way.

At a small distance from the flooding area is at the bottom 48 of the Housing a channel 56 is provided, which is approximately parallel to the water tank 50 extends and over / is flushed by the liquid stream. The groove 56 forms a Trap for heavy contaminants that accumulate in it and continuously or can be withdrawn in cycles. Downstream of the channel 56 is a funnel-shaped inlet 58 through which the mixture consisting of water and waste material is fed to a rotary washer 60 located below.

The rotary washer 60 has a housing in which a rotating disc 62 is included. The disk 62 sits at the end of a shaft 64 which is driven by a belt 66, chain drive or the like is driven by a motor 68.

The rotating disk 62 is assigned a stationary disk 70, which is opposite to it on the same axis and axially spaced. details the disk arrangement can be seen in FIG. 3.

The stationary disk 70 has a central passage 72, at which the inlet 58 opens. The rotating disk 62 is located in the middle Arrangement below the passage 72. It is made of good that the passage 72 happened, flowed against axially. The material experiences a on the rotating disk 62 sharp deflection in the radial direction and at the same time a considerable angular acceleration. It is conveyed through the gap 74 between the rotating and stationary Disk 62, 70 consists, and it is flung away radially, with it partly on a Side wall of the housing, and partly on a bulkhead 76 meets from the upper Cover 78 depends on the housing and ends at a distance from the housing base 80.

The material becomes strong in the area between the disks 62, 70 Subjected to shear, which is called the rotary shear washer for the device justifies.

Furthermore, the particles rub against each other and on the disc surfaces, which in connection with the liquid rinse results in an excellent cleaning effect leads.

It is recommended that the goods remain between for a certain period of time the disks 62, 70 of the rotary shear washer. This can be done by that one of the disks 62, 70 gives a structured surface, the roughness of the grain size obtained during the comminution of the material is adapted. The solids contained in the mixture of water and waste The corresponding grain can then remain on the surface for a certain period of time Hold the slices, while the grains are consistently smaller and, moreover, heavier Impurities are transported away by the centrifugal force and the water flow. Fig. 3 shows schematically a shape-adapted surface structure of the rotating and stationary disk 62, 70. It can be attached, for example, by a toothing Bars are formed, among other things, and a certain path of the conveyed goods in the circumferential direction and / or specify the axial direction.

Construction variants are also possible for a rotary shearer washer. Instead of rotating disks can, for example, also have rollers running against one another Blow bars and matching counter bars can be provided. Such rollers are also capable of a sharp deflection and simultaneous acceleration in terms of magnitude to effect the conveyed material.

The housing bottom 80 of the rotary shear washer is inclined downwards inclined. It leads into a sink 82 filled to the brim, the one in terms of flow Represents calming zone. The sump 82 has a considerable depth, so that essentially only an upper layer of liquid through the goods transported through is churned while the deeper area of the sink 82 remains at rest, so that an undisturbed sedimentation of heavy components can take place there. The sink 82 tapers downward to an outlet 84 that can be shut off. This can be opened at suitable intervals in order to remove deposited heavy goods drain or replace the liquid in the sink 82 altogether.

The sequence of a rotary shear washer is essential for the invention, in which the goods passing through have a very strong change in direction and amount Acceleration with effective separation of impurities proceeds, and one Sink or resting basin 82 in which the contaminants can settle. One achieves such an excellent cleaning effect.

The goods continue to get over the edge of the sink, which is filled to the brim 82 into a discharge shaft 86, which leads to subsequent treatment stages. These can for example consist of a mill or a drying device. However, especially in the case of heavily soiled waste, a Follow up another cleaning stage for which the process described includes a pre-cleaning represents. The cleaning device described below is preferred here 100 use, which is shown in more detail in FIGS. 4 and 5.

The cleaning device 100 has an elongated cuboid housing 102 with an approximately square cross-section. The cleaning device 100 is set up with a horizontal longitudinal axis of the housing. On the side of the housing 102 sit therefrom protruding supports 104 on which feet 106 are mounted. The feet 106 stand on a substructure not shown in detail. Between the feet 106 and the supports 104 can have a height adjustment and / or shock absorbing device 108 be interposed, through which a compensation of height tolerances or a Vibration-damped installation of the cleaning device 100 is guaranteed.

A circular cylindrical sieve tube 110 is located inside the housing 102 recorded, the longitudinal axis of which coincides with that of the housing t02. The sieve pipe 110 is stationary mounted inside the housing 102, and it extends over its full length. The one provided with meshes, holes or other breakthroughs The jacket of the sieve tube 110 is consistently at a distance from the inner wall of the housing lie.

The mesh size of the sieve tube 110 is significantly smaller than that Grain size of the material that was initially obtained in the comminution device 18. With a mesh size of the die of 8 x 8 to 10 x 10 cm, the holes of the Sieve tube 110 in particular have a diameter of 2 to 3 cm. The whole facility is designed so that the initially produced grain size of the solid waste material is more or less retained over the entire washing process. Through the mesh of the sieve tube 110 can therefore only pass impurities that are clearly have smaller grains, and from which the property is freed.

In the interior of the sieve tube 110, a shaft 112 is mounted centrally and axially, which can be set in driven rotation by means of a motor 114. The motor 114 is attached to the end face of the housing 102, and the shaft 112 is corresponding passed through the housing wall. The shaft 112 carries distributed over its length a number of blades 116 extending radially from the shaft. The shovels 116 are in only shown schematically in the figures. With dashed Line is a cylinder indicated, on whose jacket the blade tips or Move blade outer edges; you can see that this is a small distance to the Inner jacket of the sieve tube 110 have. The blades 116 are axially spaced distributed over the full length of the shaft 112. You can on the same in the circumferential direction Height, en / but also be arranged circumferentially offset. For an unbalance-free run A design is particularly recommended in which a pair of blades 116 each other diametrically opposite; the blades t16 can in particular be paddle-shaped be designed.

An inlet duct is located at one axial end of the housing t02 120 for the item to be cleaned. The entry shaft 120 is oriented approximately vertically. It passes through an upper cover plate 122 of the housing 102 and opens into the Sieve tube 110, which is broken open at the appropriate point. The entry shaft 120 goes with a steeply sloping, approximately tangential to the outer jacket of the sieve tube 110 extending wall 124 into the sieve tube 110 over. The mouth of the Inlet shaft 120 is located in an upper side area of the sieve tube 110. Through material entering the mouth falls into the space between shaft 112 and screen jacket of the screen tube 110, in which the blades 116 work, the Swirl well and, if necessary, also transport in the axial direction of the sieve tube 110.

At the other axial end of the housing 102 is a discharge chute 126 arranged, which penetrates the bottom t28 of the housing 102 and into the sieve tube 110 flows out. The mouth is in the lower area of the sieve tube 110, and the discharge shaft leads almost vertically downwards. It can be in a similar, tangential geometry be arranged with respect to the sieve tube 110, like the entry shaft 120, but other designs are also conceivable.

The bottom 128, which closes off the housing 102 at the bottom, is inclined, where it is in the illustrated embodiment from the discharge side to Lowers entry side.

At a low point of the floor 128 below the entry shaft 120 an outlet 130 goes down from. The bottom 128 forms a trough in which through water passing through the sieve jacket converges. This water gets through the outlet 130 discharged.

Two liquid containers 132 are divided off inside the housing 102. The liquid containers 132 are located in the bottom area of the housing 102 that they stick out below. Within the housing 102 they are crossed to the longitudinal direction of the housing extending transverse walls 134 and in the longitudinal direction of the housing extending, inclined, downwardly converging side walls towards the center of the housing 136 limited. The upper edge of the walls 134, 136 lies above the lowest point of the Sieve tube 110, but below its longitudinal center plane, so that a lower part of the sieve tube 110 is immersed in the liquid container 132. The transverse walls 134 pull through the sieve tube t10; however, the inclined side walls 136 come laterally Distance from the jacket of the sieve tube 1t0 to lie. The liquid level 138 in the liquid container 132 is adjusted so that the blades 116 and Immerse the goods taken with them into the liquid. This is how the good becomes wetted and cleaned.

The two liquid containers 132 are axially spaced approximately in arranged in the middle between inlet chute 120 and discharge chute 126. Registered Good is first of all in an area lying in front of the liquid containers 132 shoveled over, with water and impurities fitting through the mesh of the screen tube 110 can get into the housing space that surrounds the sieve tube 110. So it happens a drainage of the property. When conveying further in the longitudinal direction of the sieve tube 110 the material passes through the first liquid container 132, through which it largely is shoveled through and washed. Also components that make up the liquid container 132 do not happen themselves, are thoroughly wetted in the area above the same, cleaned and kept flowing. The first liquid container closes an intermediate zone in which a renewed drainage took place and downstream of it the second liquid container 132 follows with renewed moistening and cleaning. After passing through another dewatering zone, the material finally arrives the discharge chute 126, through which it can be used for further processing e.g.

is passed through drying or grinding.

It can be seen that the material is conveyed through the sieve tube 110 Alternate humidification and drainage zones. For this purpose it can be seen even just a single one, or a series of more than two spaced apart Liquid containers 132 may be provided. Man so gets in a and the same device a cascade of successive cleaning stations. The cleaning effect is achieved on the one hand in that the blades 116 the entangled goods swirl around in the cleaning liquid, with the particles multiplying and strongly rub against each other, which is why the device according to the invention is also used as a friction washer is to be designated, The cleaning liquid, preferably water with suitable Detergent additives can pass through the mesh of the sieve tube 110 and into the Pass outlet 130, and the same applies to particularly heavy contaminants> which fit through the mesh of the sieve tube 110.

In addition, the interposed liquid container 132 the cleaning fluid exchanged in cascades, so that gradually better and better purified fractions are obtained. Another dirt separation takes place in the liquid containers 132 themselves. The particles scooped through soluble and non-buoyant components separated, the latter in the liquid container 132 sink and can be withdrawn.

For the latter cleaning effect, it is recommended to use the liquid container t32 to give considerable depth. One achieves that through the in the Liquid container 132 immersing blades 116 and the conveyed through Well only an upper layer of liquid is swirled, while a deeper layer Shift already largely remains at rest. An undisturbed sedimentation can then occur here of the heavy components. As I said, are in the depicted Embodiment, the liquid container 132 is significantly deeper than the housing 102, and they protrude from the housing 102 with a projection 140 downwards.

The approach 140 is on the one hand by the inclined side walls 136, and on the other hand limited by an extension 142 of the transverse walls 134, which is here likewise run towards one another at an angle, so that the liquid containers 132 taper downwards in a pyramidal shape. The lower end of the liquid container 132 each forms an outlet 144 which is closed by a slide 146.

Branch lines 148 lead from the slides 146 to a collecting line 150, to which the outlet 130 at the lowest point of the housing bottom 128 is also connected is. Furthermore, the outlet 84 of the cesspool is on the collecting line 150 82 connected so that a common drainage of all wastewater takes place. The manifold 150 leads into the sewer system or to a water treatment plant not shown in detail. In normal washing operation, the slides 146 are closed. They will if necessary opened to the heavy components accumulated at the bottom of the liquid container 132 withdraw or drain the contents of the liquid container 132 altogether.

The axial width of the liquid container 132 is in that shown Embodiment chosen so that each pair of adjacent, axially spaced and diametrically opposed twin blades in one of the liquid containers 132 work. The drainage space between adjacent liquid containers 132 is about the same width, i.e. it also offers space for two pairs of double blades.

The cleaning device 100 can be next to the liquid containers 132 contain further devices for moistening the conveyed material. In particular, the shaft 112 can be designed as a hollow shaft and carry spray nozzles, is sprayed by the cleaning fluid radially from the inside to the outside. Even in the housing cavity outside the sieve tube 110 can be arranged in a variety of ways Spray nozzles be attached, which in this case is stationary and thus are particularly simple in terms of connection technology. The inventive / according arrangement of Liquid containers 732 is expediently supplemented by spray nozzles 152, which above the sieve tube in the axial area above the liquid containers 132 are located. The spray nozzles 152 are via lines 154 with water or other Cleaning fluid is supplied, the inflow being controlled via a valve 156. The spray nozzles 152 lead at the same time as the wetting of the material below in the liquid container 132 moistening from above. The upstream or downstream drainage points on the other hand, remain clearly separated in terms of their function.

The transport of the goods to be cleaned can both by a conveying effect of the blades 116, as well as by displacement by means of material that is at the inlet shaft 120 is delivered later.

List of reference symbols 10 housing 12 inclined conveyor belt 14 induction bridge 16 shaft 18 shredding device 20 punch 22 working cylinder 24 die 26 Collection space 28 Pipe socket 30 Bunker 32 Roller (die) 34 Roller (punch) 36 Opening 38 knobs 40 arrow 42 interior 44 conveyor belt 46 station 48 floor 50 water tank 52 pipe 54 valve 56 channel 58 inlet 60 rotary scrubber 62 rotating Pulley 64 shaft 66 belt drive 68 motor 70 stationary pulley 72 passage 74 Gap 76 bulkhead 78 cover 80 housing bottom 82 sink 84 outlet 86 discharge shaft 100 Cleaning device 102 Housing 104 Carrier 106 Foot 108 Shock absorber 110 Sieve tube 112 shaft 114 motor 116 blade 118 Line 120 entry shaft 122 cover plate 124 wall 126 discharge chute 128 bottom 130 outlet 132 liquid container 134 transverse wall 136 side wall 138 liquid level 140 turnover 142 extension 144 Outlet 146 gate valve 148 branch line 150 collecting line 152 spray station 154 line 156 valve

Claims (18)

Claims 1. Method for processing plastic waste, in particular of film material supplied in bale form for the production of as Raw material usable, high-purity plastic, characterized in that the waste preferably coarsely pre-comminuted in a defined particle size, into a liquid flooded in and the liquid was greatly accelerated relative to the waste material, thereby the goods are separated and washed and then introduced into a calming zone, separates non-buoyant impurities through sedimentation and the rest non-buoyant as well as buoyant impurities that have a particle size smaller than that of the material to be cleaned, preferably over horizontally arranged sieve tube sections in separate liquid container promotes from which the material is washed out by the addition of liquid, the impurities through pulls off the sieve openings and the material is conveyed, discharged and dewatered. 2. The method according to claim 1, characterized in that the Waste material was washed away when it was flooded in with a strong current and the mixture then leads over a liquid-filled depression, which acts as a trap for heavy cargo serves. 3. The method according to claim 1 or 2, characterized in that one makes the acceleration by deflecting from the axial to the radial direction and gives the flowing mixture an angular acceleration. 4. The method according to any one of claims 1 to 3, characterized in that that for a certain dwell time in the mixture with a specific grain size waste material contained in the deflection area ensures. 5. The method according to any one of claims 1 to 4, characterized in, that the grain size obtained initially by crushing the waste material during leaves the washing process essentially unchanged. 6. Device for performing the method according to one of the claims 1 to 5, characterized in that it has a die (32) provided with holes has through which the waste material is pressed for comminution. 7. Apparatus according to claim 6, characterized in that the die (32) is essentially flat and the pressing is carried out by a reciprocating, the stamp (20) acting on the waste material takes place. 8. Apparatus according to claim 6, characterized in that for comminution two opposing rollers (32, 34) which are in engagement with one another are used, of which one (32) is provided as a die with holes (36), while the other (34) has knobs (38) that fit into the holes (36). 9. Device for performing the method according to one of the claims 1 to 5 and in particular claims 6 to 8, characterized in that for Floating in a water tank (50) with an outlet gap is provided above one of which is used for transporting the comminuted material conveyor line (44) ends. 10. Apparatus according to claim 9, characterized in that parallel and at a short distance from the outlet gap of the water tank (50) a liquid-filled floor gutter (56) is located. 11. Device for performing the method according to one of the claims 1 to 5, in particular claims 6 to 10, characterized in that they have a Rotary washer (60) with at least one rotating, axially flowable disc (62) contains. 12. The device according to claim 11, characterized in that the rotating disk (62) is axially spaced apart from a stationary disk (70), which preferably has a centrally arranged passage (72) above it a funnel-shaped inlet (58) can be arranged. 13. Apparatus according to claim 11 or 12, characterized in that that at least one of the disks (62, 70) has a structured surface, whose roughness is adapted to the grain size of the waste material and, for example, by Teeth, attached ridges, etc. can be formed. 14. Device according to one of claims 11 to 13, characterized in that that it contains a sink (82) downstream of the rotary washer (60), of which Walls converge downwards on at least part of its height, and at that At the lowest point there is a lockable drain (84). 15. Device according to one of claims 6 to 14, characterized in that that the unit consisting of the rotary washer (60) and sink (82) has a post-cleaning device (100) is arranged downstream, which has a housing (102) which has an inclined bottom (128) and at a low point of the bottom (128) has a liquid drain (130), a sieve tube (110) arranged in the housing (102) in its axial end region an inlet opening (120) and an outlet opening (126) are provided for the goods, and a driven one that is rotatably mounted in the center and axially inside the sieve tube (110) Shaft (112) which carries a number of blades (116) which act on the material, and in the case of the housing (102) at least one liquid container (132) having a the sieve tube (110) partially filling the liquid level (138) is divided into immersed in the one or more blades (116). 16. The apparatus according to claim 15, characterized in that the Mesh size of the sieve tube (110) is much smaller than that when crushing of the waste material obtained. 17. Apparatus according to claim 15 or 16, characterized in that that the liquid container (132) is in a lower wall area of the sieve tube (1t0) is located, is open at the top and with its upper edge over the inner jacket of the sieve tube (110) protrudes. 18. Apparatus according to claim 16 or 17, characterized in that that a collecting line (120) is present to which the outlet of at least one liquid container (132), the liquid drain of the housing (102) and the drain (84) of the sink (82) are connected.