FI131002B1

FI131002B1 - An arrangement for crushing an object

Info

Publication number: FI131002B1
Application number: FI20225160A
Authority: FI
Inventors: Tommi Leppiaho; Henri Pesonen; Pasi Miettinen
Original assignee: Waprece Oy
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2024-07-29
Also published as: FI20225160A1; WO2023161560A1

Abstract

An arrangement (100) for crushing an object comprises a fluid jet crusher (102) for providing a high-speed fluid jet (104) towards the object to be crushed. The arrangement comprises also a supporting structure (105) for supplying or supporting the object (101) for the fluid jet crusher (102) so that the high-speed fluid jet (104) is configured to crush a first volume (101A) of the object first and a second volume (101B) of the object second so that said first volume of the object is free of contact of said supporting structure (105). The arrangement is configured to supply the second volume (101B) of the object for the fluid jet crusher (102) after the first volume and in addition to configured to supply a medium between the supporting structure (105) and the second volume (101B) so that also the second volume is free of contact of said supporting structure (105) of the arrangement during crushing said second volume. The medium to be provided between said second volume and supporting structure is a next object (101) to be crushed next and/or fluid layer (113).

Description

AN ARRANGEMENT FOR CRUSHING AN OBJECT

TECHNICAL FIELD OF THE INVENTION

The invention relates to an arrangement for crushing an object, such as construction waste, concrete, mineral wool, fibers, plastic, woods, clothes and organic based material, for example. In particularly the invention relates to an arrangement having a fluid jet crusher with at least one nozzle for providing a high-speed fluid jet towards the object to be crushed.

BACKGROUND OF THE INVENTION

It is known to use a high-speed fluid jet to cut or even crush objects. However, many of the known methods and devices have problems or disadvantages, namely the high-speed fluid jet may ricochet from supporting structures of the devices supporting the object to be crushed which might be dangerous. In addition, the high-speed fluid jet may cause damages to the supporting structures of the devices when the object to be cut or crushed is crushed and when the high-speed fluid jet hits the supporting structures supporting the object, and in particularly when the device is used in a repetitive manner.

When the object is crushed at least partially, the high-speed fluid jet typically hits also the supporting structures of the devices and not only the remaining object. Further, when the operation is repetitive, the supporting structures of the devices might be exposed to high load and damages, whereupon the

N lifetime of the device and the supporting structures is not long.

N

S

N 25 SUMMARY OF THE INVENTION , An object of the invention is to alleviate and eliminate the problems relating 8 to the known prior art. Especially the object of the invention is to provide an

N arrangement and method for crushing an object so that harmful effects of the

S high-speed fluid jet to supporting structures of the arrangement is minimized or even prevented and at the same time maximizing the overall crushing power and crushable effects of the high-speed fluid jet to the object.

The object of the invention can be achieved by the features of independent claims.

The invention relates to an arrangement for crushing an object according to claim 1. In addition, the invention relates to a method for crushing an object according to claim 9.

According to an embodiment of the invention an arrangement for crushing an object comprises a fluid jet crusher having at least one nozzle for providing a high-speed fluid jet towards the object to be crushed. The object can be at least in principle any soft or hard material, like construction waste, mineral wool, plastic, wood, concrete, fibers, clothes, leather, textile material or fabric, glass and/or organic material, for example. The high-speed fluid jet may be water or any other fluid, and it may comprise also an additive, like quartz or silica or the like to enforce the momentum of the high-speed fluid jet and thereby the enforce the crushing effect. In addition, the high-speed fluid jet may also have disinfectant or dye, for example, but not however limiting to those only, and the additive can be selected according to the situation in question, such as whether there is soft or hard material to be crushed or is there a demand for disinfecting the material to be crushed.

The arrangement comprises also a supporting structure for supplying or supporting the object for the fluid jet crusher and the high-speed fluid jet so that the high-speed fluid jet can crush a first volume of the object first and a second volume of the object second. The supporting structure is advantageously arranged so that the high-speed fluid jet hits the first volume of the object first, whereas the supporting structure supports the second a 25 — volume behind the first volume whereupon the high-speed fluid jet does not

N hit the supporting structure of the arrangement. It is to be noted that the first e volume of the object is arranged between the second volume and the high-

N speed fluid jet and so that said first volume of the object is free of direct

I contact of said supporting structure or so that the second volume of the object > 30 is between the supporting structure and first volume or the high-speed fluid 8 jet. The first volume of the object is advantageously faced against the high-

N speed fluid jet.

O

N According to an advantageously embodiment, the arrangement is configured to supply the second volume of the object for the fluid jet crusher after the first volume, advantageously after essentially crushing said first volume first. In addition, the arrangement is configured to supply a medium between the supporting structure and the second volume so that the second volume is free of direct contact to said supporting structure of the arrangement during the high-speed fluid jet is crushing said second volume. The medium to be provided between said second volume and supporting structure may be a next object to be crushed next and/or fluid layer, such as a water layer, whereupon the hit of the high-speed fluid jet to the supporting structure can be avoided due to the next object and/or fluid layer between the said second volume and supporting structure. In this case a first volume of the next object or the fluid layer supports the second volume of the previous object crushed by the high-speed fluid jet. Thus, when the second volume of the first object is crushed, the high-speed fluid jet hits either the next object to be crushed or the fluid layer, and not the supporting structure. In addition, also the risks for the ricochets of the high-speed fluid jet can be prevented or at least minimized by said next object to be crushed or the fluid layer.

The speed of the high-speed fluid jet provided by the fluid jet crusher is at least ~100 m/s, but advantageously 1-6, more advantageously at least 8, and most advantageously at least 9 times the speed of sound. The pressure of the high-speed fluid jet is at least 200, more preferably 1000-6000, more advantageously at least 7000, or even at least 8500 bar. It is to be noted that when the high-speed fluid jet with high speed and high pressure is run and flown through the nozzle, the temperature of the fluid rises easily over 200 C? or even over 300 C°, which is enough to destroy e.g. bacterium and having thus a disinfecting effect to the material of the crushed object. It is to be understood that the temperature of the high-speed fluid jet can also be + managed and controlled to a desired level by methods known from by the

S skilled person.

S According to an exemplary embodiment the supporting structure for supplying

N the object for the fluid jet crusher is a moving device, which is configured to

E 30 move the object from a first position to a second position. In the first position o the object is advantageously received by the moving device so that the object = can be moved by the moving device to the second, supplying position. In the

N second position the object, or at least its first volume (i.e. a distal end) is

N supplied and introduced to the fluid jet crusher and the high-speed fluid jet.

However, it is to be noted that of the second portion of the previous object is still left, the next object to be moved from the first position to the second position advantageously supports and moves and thereby supplies the second volume of previous object to the fluid jet crusher.

The moving device may be e.g. a pusher, piston, conveyor, tracked conveyor, or a screw conveyor. It is to be noted that the pusher and piston types moving devices make back and forth movement between the first and second positions. When the first object is moved from the first position to the second position, it can be kept rest during the crushing e.g. via compression from the sides, and at the same time the moving device can go back to the first position to receive the second object to be moved to the second position and again to the fluid jet crusher or to support and push and thereby to supply the second volume of the previous object to the fluid jet crusher. Thus, the arrangement can be operated continuously. Further, it is to be noted that the conveyor or screw conveyor types moving devices are run continuously and the move the objects from the first position to the second position in a continuous manner.

In addition, according to an embodiment the arrangement may comprise a liquid input receiving a liquid flow and guiding the liquid flow between the supporting structure and the object fed to the arrangement. Thus, the object locates advantageously between the guided liquid flow and the fluid jet crusher and the guided liquid flow is configured to move the object from the first position to the second position and thereby supplying the first volume of said object for the fluid jet crusher or to supporting and supplying the second volume of previous object for the fluid jet crusher by said object moved from said first position to said second position.

According to an embodiment the arrangement comprises a conical portion at a 25 a distal portion of the device or at the second position area. The conical

N portion is advantageously arranged so that the moving device moves the e object to or through said conical portion when the object is moved from the

N first position to said second position by said moving device. The conical

I portion is arranged to converge in the direction of the movement of the object > 30 from the first position to said second position, and thereby to press the object 8 tighter and thereby causing higher counterforce for the object against the

N high-speed fluid jet and to keep the object essentially in rest.

O

N According to an embodiment a diameter of a distal portion of the arrangement is adjustable so that the diameter may be large when receiving the object into the distal portion and then adjust the diameter of the distal portion smaller to press the object tighter and causing higher counterforce for the object against the high-speed fluid jet and to keep the object essentially in rest. According to an embodiment the diameter of the conical portion may also be adjustable similarly as described above in connection with the distal portion of the 5 arrangement.

In addition, according to an embodiment the arrangement may also comprise protrusions, such as wedge shaped protrusions or pusher plates or the like.

Advantageously they are arranged at the second position (i.e. near or at the distal portion of the arrangement) or near the fluid jet crusher. In addition, they are arranged to interact with the object and to press the object tighter and thereby causing higher counterforce for the object against the high-speed fluid jet and to keep the object essentially in rest when said object is moved to said second position. According to an embodiment the conical portion may comprise additionally said protrusions. Still, according to an embodiment the conical portion may comprise both the protrusions and adjustable diameter.

The fluid jet crusher and the moving device are advantageously arranged so that the first volume of the object is moved towards the high-speed fluid jet of the fluid jet crusher when the moving device is operated to move the object from the first position to the second position.

According to another embodiment the supporting structure for supporting the object for the fluid jet crusher is an inner wall of a chamber. The fluid jet crusher is advantageously arranged essentially at the centre of the chamber so that the high-speed fluid jet is directed towards the inner wall of the chamber and therefore towards the object, and in particularly to the first a 25 volume of the object. The chamber advantageously comprises the fluid layer

N between the inner wall of the chamber and the object, whereupon the object 3 is located between the fluid layer and the fluid jet crusher.

N

N As an example, the chamber is a cylindrical chamber and the fluid jet crusher = is arranged essentially at the central axis of the cylindrical chamber so that 3 30 the high-speed fluid jet is directed towards the inner wall of the cylindrical lo chamber and therefore towards the object located between the fluid layer and

O the fluid jet crusher.

The fluid layer can be arranged in numerous ways to the chamber and between the inner wall of the chamber and the object. For example, according to an example the arrangement comprises a vortex generator for applying a vortex so that the fluid revolves around the central axis of the cylindrical chamber and rises up along the inner wall thereby forming said fluid layer between the inner wall of the chamber and the object. The vortex generator may be e.g. a pump or a revolving inner wall or a revolving bottom portion of the chamber.

According to an example the arrangement may comprise also a fluid wall equipment for providing a fluid wall and thereby said fluid layer between the inner wall of the chamber and the object. The fluid wall can be achieved e.g. by pumping fluid to the upper portion of the chamber and let it rain down along the inner wall of the chamber. In addition, according to an example the arrangement may comprise a fluid shower for showering and thereby providing said fluid layer between the inner wall of the chamber and the object. The fluid shower is advantageously arranged to the inner wall of the chamber so that it sprays the fluid and generates the fluid layer to the surface of the or next the inner wall of the chamber.

In addition, according to an advantageously embodiment a direction of the high-speed fluid jet can be controlled either manually or automatically or both.

It is to be noted that the direction of the high-speed fluid jet may also be configured to oscillate or make a repetitive or an arbitrary pattern or rotate or swing in order to have more crushable effect. In practise, the arrangement may have e.g. a rotating or swinging nozzle and/or a rotating fluid jet crusher.

Furthermore, according to an embodiment, a position of the fluid jet crusher can be moved, such as raised and/or lowered or moved towards or away from the object. It is to be noted that the direction and/or position of the high-speed

N fluid jet can be controlled in all embodiments described in this document.

N

O Still in addition, according to an embodiment, the arrangement may also

N comprise a pattern recognition device for recognition the object to be crushed

I and the arrangement may also be configured to direct and focus the high- > 30 speed fluid jet towards the object to be crushed and in particularly to portions 8 of the object still left, for example in cases where a portion of the object has

N already been crushed and another portion is still left. The pattern recognition

S device can be implemented e.g. by a camera or technigues based on ultrasound, NIR (Near Infrared) or another technigues suitable for pattern recognition and not limited to those only, as understood by the skilled person.

All the embodiments may also comprise a separation equipment for receiving crushed material and separating the crushed material from the mix of fluid and crushed material. The separation equipment may e.g. has a pump system for pumping the mix of fluid and crushed material to a separation device having e.g. mechanical separation means, such as mesh with different sides of holes, or gravitational or centrifuge or types means, or magnetic base devices or combination of those or other devices suitable for separation of fluids and crushed material from each other known by the skilled person.

The present invention offers advantages over the known prior art, such as enabling a safe and continuous operation of the arrangement for crushing different types of objects. According to the invention loads and possible damages to supporting structures of devices can be minimised and at the same maximise the lifetime of the device and the supporting structures. In addition, possible ricochets from the supporting structures of the devices can be prevented or at least minimised. Furthermore, at the same, a disinfecting effect can be exposed to the material of the crushed object during crushing.

Still, also fibrous material can be crushed by the invention to a significantly small piece size in an energy efficiently way because the fibrous material can be fed continuously to the fluid jet crusher and in some embodiments the fibrous material can “float” on the medium or on the fluid layer supporting said fibrous material at the same when the high-speed jet crushes the fibrous material.

The exemplary embodiments presented in this text are not to be interpreted to pose limitations to the applicability of the appended claims. The verb "to comprise" is used in this text as an open limitation that does not exclude the

N existence of also unrecited features. The features recited in depending claims a are mutually freely combinable unless otherwise explicitly stated.

O

N The novel features which are considered as characteristic of the invention are

I set forth in particular in the appended claims. The invention itself, however, > 30 both as to its construction and its method of operation, together with additional 8 objects and advantages thereof, will be best understood from the following

N description of specific example embodiments when read in connection with

S the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Next the invention will be described in greater detail with reference to exemplary embodiments in accordance with the accompanying drawings, in which:

Figures 1-9 illustrate a principle of an exemplary arrangement for crushing objects according to an advantageous embodiment of the invention, and

Figures 10-18 illustrate a principle of another exemplary arrangement for crushing objects according to an advantageous embodiment of the invention.

DETAILED DESCRIPTION

Figures 1-9 illustrate a principle of an exemplary arrangement 100 for crushing objects according to an advantageous embodiment of the invention, where the arrangement comprises a moving device 106 for moving the object 101 from a first position 107 to a second position 108.

The arrangement 100 comprises a fluid jet crusher 102 having at least one nozzle 103 for providing a high-speed fluid jet 104 towards the object 101.

The arrangement 100 comprises also a supporting structure 105 for supporting and supplying the object 101 for the fluid jet crusher 102 and the high-speed fluid jet 104. In the arrangement 100 illustrated in Figures 1-5 the < supporting structure 105 is a moving device 106, which moves the object from

S a first position 107 to a second position 108. Different kinds of moving devices

O are described in Figures 1-6. The object is an 3D object and it is supplied to

A 25 the fluid jet crusher 102 so that a first volume 101A of the object faced towards

N the high-speed fluid jet 104 is crushed first, as can be seen in particular in = Figure 1.

O

= Figure 1 describes the arrangement, where the moving device is a piston type

N moving device 106. When the piston 106 is in the first position 107 (Figure 2),

N 30 it can receive the object 101 from a space 115, after which the piston 106 is moved from the first position to the second position 108 and towards the fluid jet crusher 102 and the high-speed fluid jet 104, as is the case in Figure 1 and

3, for example. In the second position 108 the object 101, or at least its first volume 101A (i.e. a distal end) is supplied and introduced to the fluid jet crusher 102 and the high-speed fluid jet 104. However, it is to be noted that if the second portion 101B of the previous object is still left, the next object 101 to be moved from the first position 107 to the second position 108 advantageously supports and moves and thereby supplies the second volume 101B of previous object 101 to the fluid jet crusher 102 and the high- speed fluid jet 104, as is the case especially in Figure 3, where the first volume 101A of the previous object has already crushed and the second volume 101B is only left, whereupon the first volume 101A of the next object pushes the second volume 101B of the previous one ahead.

Figure 5 describes a screw conveyor 106, which can continuously move the objects from the first position 107 to the second position 108. The screw conveyor 106 is advantageously arranged so that the high-speed fluid jet 104 hits the first volume 101A of the object first, whereas the screw conveyor 106 supplies or supports the second volume 101B behind the first volume 101A of the same object whereupon the high-speed fluid jet 104 does not hit the supporting structure, or the screw conveyor 106. Of course, also the screw conveyor 106 may supply the next object 101 and support and push the second volume 101B of the previous one by the first volume 101A of the next one. Anyway, in both cases the high-speed fluid jet 104 does not hit the supporting structure, or the screw conveyor 106, but only the object 101.

In addition, according to an embodiment the arrangement may comprise a liquid input 118 receiving a liquid flow 119 and guiding the liquid flow 119 to move the object 101 from the first position 107 to the second position 108 and

N again to the fluid jet crusher 102 and the high-speed fluid jet 104, as is the

N case in Figure 6. There a back end 120 can be understood as the supporting

S structure 105, whereupon the liguid flow 119 is guided between the

N supporting structure 105/120 and the object 101 fed to the arrangement. Now

E 30 the back end 120 functions as the supporting structure 105 supporting the o liguid flow so that the liguid flow is guided and enforced to flow and move the = object 101 from the first position 107 to the second position 108. It is to be

N noticed that in this embodiment (Figure 6) the object 101 locates between the

N guided liquid flow 119 and the fluid jet crusher 102 and the guided liquid flow is configured to move the object from the first position 107 to the second position 108 and thereby supplying the first volume 101A of said object 101 for the fluid jet crusher 102 or to supporting and supplying the second volume 101B of previous object 101 for the fluid jet crusher 102 by the next object 101 moved from said first position 107 to said second position 108.

The arrangement illustrated in Figures 1-6 advantageously comprises also a conical portion 109 at a distal portion 122 or at the second position 108 area.

The conical portion 109 is arranged to converge in the direction 110 of the movement of the object 101 from the first position 107 to said second position 108. In addition, a diameter 121 of the distal portion 122 may be adjustable so that the diameter 121 may be large when receiving the object 101 into the distal portion 122 of the arrangement, after which the diameter 121 can be adjusted smaller to press the object 101 tighter and causing higher counterforce for the object 101 against the high-speed fluid jet 104 and to keep the object essentially in rest, even if the moving device, like the piston, is moved back to the first position 107 to receive the next object.

The arrangement may also comprise protrusions 111, such as wedge shaped protrusions or pusher plates or the like, as is illustrated in Figure 4.

According to an embodiment the conical portion 109 may comprise additionally said protrusions 111. In addition, according to an embodiment the conical portion 109 may also comprise said adjustable diameter 121.

In addition, as can be seen in Figures 8 and 9 (and also in Figure 16), the arrangement 100 may also comprise a pattern recognition device 126. The pattern recognition device is advantageously in data connection with a control unit (not shown in Figures) of the arrangement so that the control unit may < control e.g. the change of the diameter 121 of a distal portion 122 of the

S 25 arrangement or the diameter 121 the conical portion 109 and/or the high-

O speed fluid jet 104, such as pressure, speed and direction and track of the

A fluid jet 104 so to e.g. cause more powerful crushing effect to a portion of the

N object being left. [an - Figures 10-18 illustrate a principle of another exemplary arrangement 100 = 30 according to an advantageous embodiment of the invention, wherein the

N arrangement 100 comprises a chamber type design. In the embodiments

N illustrated in Figures 10-18 the supporting structure 105 for supporting the object 101 for the fluid jet crusher 102 is an inner wall 116 of the chamber 112. There the fluid jet crusher 102 is arranged essentially at the centre of the chamber (at the central axis 114 of the cylindrical chamber) so that the high- speed fluid jet 104 is directed towards the inner wall 116 of the chamber 112 and the object 101, and in particularly to the first volume 101A of the object 101 faced towards the high-speed fluid jet 104.

The chamber comprises the fluid layer 113 between the inner wall 116 of the chamber 112 and the object 101 so that the object is located between the fluid layer 113 and the fluid jet crusher 102. Thus, the high-speed fluid jet 104 does not have a direct contact with the supporting structure 105 or in this embodiment the inner wall 116 of the chamber but it hits to the object (first volume and then the second volume) and after the object is crushed the high- speed fluid jet 104 hits the fluid layer 113.

The fluid layer 113 can be arranged in numerous ways. For example, the arrangement may comprise a vortex generator 117 for applying a vortex so that the fluid revolves around the central axis 114 of the cylindrical chamber 112. When the fluid is revolving fast enough inner the cylindrical chamber, the level of the fluid rises up along the inner wall 116, as can be seen in Figure 11, and especially in Figures 16 and 18. Thus, when the fluid rises up along the inner wall 116 it form said fluid layer 113 between the inner wall 116 of the chamber and the object 101.

As can be seen in Figure 10, the arrangement comprises a pump 117 (functioning as said vortex generator 117) for pumping the fluid inside the chamber to revolve around the central axis 114 of the cylindrical chamber 112 so fast that the vortex is generated, and the level of the fluid rises up along the inner wall 116. It is to be noted that the vortex generator 117 can be a 25 implemented also in other ways than by the pump, such as e.g. by arevolving

N inner wall 116 or a revolving bottom portion of the chamber.

LO

= In Figure 11 the fluid is in rest inside the chamber 112 and in Figure 12 the

N fluid revolves so that it raises along the inner wall of the chamber and thereby = forms said fluid layer 113. Now also the fluid jet crusher 102 can be seen at 3 30 the center 114 of the chamber 112 when the fluid revolves. In Figure 13 the lo object is introduced into the chamber 112 advantageously from the top portion

N and dropped to the revolving fluid. When the fluid revolves and forms the fluid

N layer 113, it at the same also supports and supplies the object to the fluid jet crusher 102 and high-speed fluid jet 104, as is the case in Figures 14 and 15.

Now, when the fluid revolves and supports the object, the object is also continuously revolved around the central axis 114 of the chamber 112 sop that the high-speed fluid jet 104 crushed the first volume 101A of the object.

When the first volume 101A of the object is crushed, behind it is the second volume 101B of the object and behind that the fluid layer 113. Thus, when also the second volume 101B and therefore the entire object 101 is crushed the high-speed fluid jet 104 will hit the fluid layer 113 and not the supporting structure 105 behind the object or fluid wall. The arrangement 100 illustrated in Figures 10-18 can also be operated continuously because the crushed material can be removed from the chamber at the same time when the new objects are introduced to the chamber. The removing can be done e.g. by the pump system 123 or the like and with suitable separation equipment. As illustrated Figures 10-18, the arrangement comprise also a separation equipment 124 for receiving crushed material and separating the crushed material from the mix of fluid and crushed material.

The invention has been explained above with reference to the aforementioned embodiments, and several advantages of the invention have been demonstrated. It is clear that the invention is not only restricted to these embodiments, but comprises all possible embodiments within the spirit and scope of the inventive thought and the following patent claims.

For example it is to be noted that in addition to the disclosure and examples, that even if the arrangement illustrated in Figures 1-9 is depicted in a horizontal level (the object 101 is moved horizontally in the direction 110), the arrangement can also be operated vertically so that the object is moved from top to bottom. In that kind of arrangement the fluid jet crusher 102 advantageously locates at the bottom of the arrangement and so that the

N gravity is also used to help to move the object and keep it in the exposure of a the high-speed fluid jet.

O

N In addition, the arrangement illustrated in Figures 10-18 is depicted in a

I vertical level, whereupon the arrangement advantageously also comprises a > 30 conveyor 125 to convey the objects to the chamber. It is to be noted that the 8 conveyor 125 optional and the objects can be lifted e.g. by a crane and

N dropped down to the chamber.

O

N The features recited in dependent claims are mutually freely combinable unless otherwise explicitly stated.

Claims

1. An arrangement (100) for crushing an object (101) to be crushed, wherein the arrangement comprises - a fluid jet crusher (102) having at least one nozzle (103) for providing a high-speed fluid jet (104) towards the object (101) to be crushed, and - a supporting structure (105) characterized in that - the supporting structure (105) for supporting the object (101) for the fluid jet crusher (102) is an inner wall (116) of a chamber (112), and - the arrangement comprises a vortex generator (117) for providing a vortex so that the fluid revolves around the chamber (112) and rises up along the inner wall thereby forming a fluid layer (113) between the inner wall of the chamber and the object (101) to be crushed thereby supporting the object and so that the object is free of contact of said supporting structure (105).

2. An arrangement of claim 1, wherein the fluid jet crusher (102) is arranged essentially at the centre of the chamber so that the high-speed fluid jet (104) is directed towards the inner wall of the chamber and therefore towards the object located between the fluid layer (113) and the fluid jet crusher (102).

3. An arrangement of any previous claims, wherein the chamber is a cylindrical chamber (112) and wherein the fluid jet crusher (102) is arranged essentially at the central axis (114) of the cylindrical chamber so that the high- speed fluid jet (104) is directed towards the inner wall (116) of the cylindrical chamber (112) and therefore towards the object (101) located between the N 25 — fluid layer (113) and the fluid jet crusher (102).

5 4. An arrangement of any previous claims, wherein the vortex generator A (117) is a pump or a revolving inner wall or a revolving bottom portion of the N chamber. vortex generator may also be air pressure device [an

- 5. An arrangement of any previous claims, wherein the arrangement = 30 comprises a separation equipment for receiving crushed material from the N crushed object and the fluid used for crushing and separating the crushed N material from the fluid.

6. An arrangement of any previous claims, wherein a direction of the high- speed fluid jet (104) is controllable or is configured to oscillate or make a repetitive or an arbitrary pattern or rotate or swing in order to have more crushable effect.

7. An arrangement of any previous claims, wherein a position of the fluid jet crusher (102) is configured to be moved, such as raised and/or lowered in the chamber.

8. An arrangement of any previous claims, wherein the arrangement comprises a pattern recognition device (126) for recognition the object to be crushed and wherein the arrangement is configured to focus the high-speed fluid jet (104) towards the object to be crushed and in particularly to portions of the object still left.

9. A method for crushing an object (101) to be crushed, wherein the method comprises: - providing a high-speed fluid jet (104) by a fluid jet crusher (102) towards the object to be crushed, and - supporting the object (101) for the fluid jet crusher (102) characterized in that - the supporting of the object (101) is implemented by an inner wall (116) of a chamber (112), and - a vortex is generated so that the fluid revolves around the chamber (112) and rises up along the inner wall thereby forming a fluid layer (113) between the inner wall of the chamber and the object (101) to be crushed, thereby supporting the object and so that the object is free of contact of said supporting structure (105). N S 25 LÖ <Q N N O O LO QA N oo Al