High-pressure roller press with vibration device in the feeding device

Abstract

The present invention relates to a high-pressure roller press (100, 200) for high-pressure crushing of a compacted material (101) in a roller gap (102, 202), comprising two rollers (103, 103', 203, 203') moving in opposite directions, which form the roller gap (102, 202) between each other, wherein the compacted material (101) to be crushed passes through the roller gap during crushing under high pressure and thereby generates a crushing in the structural organization of the compacted material (101) in the roller gap (102, 202), and the high-pressure roller press further comprises a feeding device (104, 204) which feeds the compacted material (101) uniformly to the roller gap (102, 202), wherein the volume of the fed compacted material (101) forms a compression region (105, 205) which is formed by the volume of the roller gap (102, 202). The roller gap (102, 202) is extended approximately from the center to slightly beyond the center of the roller gap (102, 202), wherein a device for pre-compressing the compacted material (101) in the form of a vibration device (110, 210) is arranged above the compression area (105, 205) and reaches the vicinity of the compression area (105, 205), and wherein a metering slide (111, 211) is arranged in the feeding device (104, 204), by means of which the feeding position and feeding amount of the compacted material (101) in the roller gap (102, 202) can be adjusted. According to the present invention, the vibration device (110, 210) is connected to the metering slide (111, 211), wherein the metering slide (111, 211) introduces the vibration energy of the vibration device (110, 210) into the compression area (105, 205).

Description

Technical Field

[0001] The present invention relates to a high-pressure roller press for high-pressure crushing of a compacted material in a roller gap, the high-pressure roller press having two rollers moving in opposite directions, which form a roller gap, and the compacted material to be crushed passes through the roller gap during crushing under high pressure and thereby produces a crushing in the structural organization of the compacted material in the roller gap. The high-pressure roller press also has a feeding device, which feeds the compacted material uniformly to the roller gap, wherein the volume of the fed compacted material forms a compression area, which extends from approximately the center of the roller gap to slightly beyond the center of the roller gap, wherein a device for pre-compressing the compacted material in the form of a vibrating device is arranged above the compression area and reaches near the compression area, and wherein a metering slide is arranged in the feeding device, by means of which the feeding position and feeding amount of the compacted material in the roller gap can be adjusted. Background Art

[0002] according to Patent DE2708053C3 discloses that, in order to crush brittle materials, the brittle materials are pressed into so-called flakes by means of a high-pressure load in the roller gap of a high-pressure roller press, wherein the entire material structure is broken and thus split into many small broken parts. This high-pressure crushing in the roller gap is different from the crushing by shearing or friction in conventional grinding, because it depends primarily on the pressure load. No shearing or friction of the compacted material occurs. In order for the corresponding high-pressure roller press to operate in compliance with regulations, it is important to apply the compacted material evenly to the roller gap, because if it is applied unevenly, the high-pressure roller press will switch to the operating state of a conventional crusher, and the crushing effect of a conventional crusher is different from the crushing effect of a high-pressure roller press with even application of the compacted material.

[0003] If the compacted material is unevenly aerated, it can shift into the air space as it passes through the roller gap, thereby avoiding the high pressure in the gap. This significantly reduces the crushing efficiency of the high-pressure roller press. Furthermore, this can lead to uneven operation of the high-pressure roller press, with the rollers experiencing rotational oscillations as the drive of the high-pressure roller press is repeatedly braked and then spun back into idle motion. This inconsistent load variation persists throughout the entire high-pressure roller press and is noticeable as vibrations throughout the entire press. Under unfavorable conditions, these vibrations can propagate into the foundation and even damage it.

[0004] To ensure uniform, smooth, and quiet operation of high-pressure roller presses and a uniform supply of compacted material to the roller gap, high-pressure roller presses are known to include a feed device for the compacted material that modulates the material flow in a controlled manner, thereby forming a constant accumulation cone in the space between the two counter-moving rollers. However, depending on the type and consistency of the compacted material, such a supply to the roller gap may not be sufficient to ensure vibration-free operation of the high-pressure roller press rollers and to achieve continuous operation of the entire crusher as a high-pressure roller press. The uneven particle distribution in the compacted material and air inclusions in the accumulation cannot always be uniformed sufficiently by simply adjusting the accumulation cone in the space between the two counter-moving rollers.

[0005] German utility model DE202009014079U1 proposes to set a vibrating rod in the feeding device near the compression area of ​​the crushed material to be crushed, which is similar to the vibrating rods known as concrete vibrators in concrete casting technology. These vibrating rods remove air from the crushed material by fluidizing it and are used to achieve uniform operation. In actual operation, it has been shown that these vibrating rods cannot meet the rough environment of the high-pressure roller press. The crushed material will wear out these vibrating rods too quickly or even break them. The life of the concrete vibrator or the metal rod placed in vibration by the concrete vibrator is not enough to ensure sufficient long-term operation of the high-pressure roller press without downtime. Summary of the Invention

[0006] The object of the present invention is therefore to provide an alternative to known concrete vibrators for fluidizing the compacted material in a feeding device. This object is achieved by connecting the vibrating device to a metering slide, wherein the metering slide introduces the vibration energy into the compression zone.

[0007] Further advantageous embodiments of the invention are given in the subordinate embodiments.

[0008] Essential to the invention is that the compacted material applied to the high-pressure roller press is compressed by discharging trapped air from the compacted material just before and during its entry into a less clearly defined compression zone. This compression zone extends from the center of the roller gap into a region above the gap, where the incoming compacted material causes a flow movement by causing it to exit downward. This reduces the free volume of the compacted material and increases its density. To support this effect, a pre-compression device is provided right here.

[0009] According to the concept of the invention, the device for compression is a vibrating device connected to the metering slide that is present anyway. According to the concept of the invention, there is no rod that extends into the feeding device and introduces vibration energy into the compacted material. Instead, it is provided that the metering slide vibrates and introduces vibration energy into the compacted material and thereby sets the loose compacted material into oscillation. Due to this oscillation, the compacted material behaves as if it were fluidized. The vibrating device therefore has the effect that the compacted material flows better, because the compacted material particles are kept in a movement similar to that of a fluidized bed by the vibrations. The individual compacted material particles fall downwards into the roller gap due to the oscillations of the fluidized bed, while the air dispersed in the compacted material escapes upwards from the compacted material and enters the outside atmosphere through the compacted material flowing behind it.

[0010] The vibration device can be arranged on the outwardly pointing side of the metering slide and set the metering slide to vibrate. The metering slide thus has the function of a vibration plate.

[0011] To increase the energy input to the compacted material, fin-like extensions can be provided on the side of the metering slide facing the compacted material. These extensions introduce vibration energy into the compacted material near the compression zone. In the simplest case, these extensions are approximately triangular or parallelogram-shaped fins that stand upright on the surface of the metering slide like vertical guide plates. Depending on the width of the compacting roller, only one fin-like extension can be provided, or two, three, or more fin-like extensions can be arranged approximately parallel to each other.

[0012] The amount of energy input to the compacted material by vibration also has an influence on the fluidization efficiency. In operation, it has been found to be advantageous if the mechanical energy input is between 0.1 kJ / m 3 and 1 kJ / m 3If the compacted material in the circulating mill or annular mill is very fine, a lower energy input for the fine compacted material is sufficient. However, if the compacted material is very fine, the energy input can only be achieved with a large surface area of ​​the vibration device. When the compacted material is coarser, for example with a smaller number of circulations in a circulating mill, the energy input must be greater. However, mechanical energy input can be easily achieved with coarse compacted material. When the compacted material has a very wide particle size distribution, the situation is different if very fine compacted material from the circular operation is mixed with coarse compacted material from the fresh material input. It has proven to be advantageous for uneven compacted material to vary the energy input by regulating the power. In order to optimize the effect of the vibration device, the vibration intensity and thereby the actual mechanical energy input can be adjusted by regulating the circuit, wherein the energy consumption of the vibration device is selected as the input parameter. As soon as the energy consumption becomes high or exceeds a previously determined nominal value, the control device reduces the vibration intensity. This is because the vibration device's operation in the already compressed material no longer has any further compression effect, and the mechanical energy input to the compact is unnecessarily increased. As a result of this reduction in vibration intensity, new, uncompressed material flows in during the continued operation of the high-pressure roller press, and the mechanical energy input is reduced again, resulting in a lower density of compact in the compression zone and at the beginning of the compression zone. In this case, the control device adjusts the vibration device again to an operating state with a higher intensity until a stable balance is reached between the vibration device's vibration intensity and its energy consumption, from which the compact density can be derived. Energy consumption and the actual mechanical energy input to the compact are correlated. However, particle size distribution and compact properties, such as different fluidization due to varying moisture content or air inclusions, can influence the actual mechanical energy input even when the energy consumption of the vibration device remains constant.

[0013] To construct a control loop, the energy consumption of the device for compression can itself be used as an input variable. It is also target-oriented to use the energy consumption of the roller drive as a control input variable, since increased energy consumption indicates a greater bulk density of the compacted material, and lower energy consumption of the roller drive indicates a lower bulk density of the compacted material. In this control principle, it should be noted that the passage of larger compacted material particles or materials that cannot be crushed by high pressure, such as metal lumps, results in a brief increase in the energy consumption of the compacting roller drive and enters the control loop in order to prevent the spread of faults by allowing the passage of non-crushable compacted material particles through the high-pressure roller press.

[0014] Another control input variable can be the roller speed. The faster the high-pressure roller press rollers rotate, the harder the compression device must work, in this case the vibration device, so that the flowing roller material can be compressed more quickly and in a shorter time in the roller gap.

[0015] The energy input can be influenced by increasing the vibration amplitude of the vibration device or by increasing the vibration frequency. Depending on the type of construction, if the vibration device is electrically excited, the frequency can be changed by varying the excitation frequency. If the vibration device is pneumatic, the frequency can usually also be varied. Commercially available concrete vibrators with a common operating frequency can produce a 1000- ... -1 (about 13Hz) and 9000min -1 (150 Hz). When the vibration frequency is between 10 Hz and 60 Hz, it has been found to be particularly effective as an excitation frequency for fluidizing the milled material.

[0016] Excitation with relatively low frequencies in the 10 Hz range is suitable for loosening coarser mill material particles. However, relatively low frequencies, which may be the resonant frequency or the natural frequency of the metering slide, can place particular stresses on the mechanical or hydraulic systems of the metering slide. Higher frequencies, such as 50 Hz or 60 Hz, which are conventional grid frequencies, are suitable for loosening finer mill material. These frequencies are generally much higher than the natural frequency of the mechanical structure of the metering slide and thus place less mechanical stress on the metering slide.

[0017] In a special embodiment of the invention, it is provided that the vibration device can be activated manually in order to activate the vibration device in the event of a possible failure of the high-pressure roller press rollers or in the event of a blockage in the milling material flow, thereby reactivating the material flow of the milling material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further explained with the aid of the following drawings, in which:

[0019] Figure 1 Sketch showing a side view of a high-pressure roller press with a metering slide with a vibrating device,

[0020] Figure 2 Shown in accordance with Figure 1 The metering slide used in the high-pressure roller press has a fin-shaped expansion portion.

[0021] Figure 3 Shown in accordance with Figure 1 A metering slide for use in a high-pressure roller press having an optional fin-shaped extension,

[0022] Figure 4A sketch showing a side view of another high-pressure roller press with an optional metering slide with a vibration device,

[0023] Figure 5 Shown in accordance with Figure 4 A metering slide for use in a high-pressure roller press having optional fin-shaped extensions and anti-wear edges,

[0024] Figure 6 A vibration diagram showing the effect of the vibration device is shown. DETAILED DESCRIPTION

[0025] The above description of the solution according to the invention thus includes in particular the various combinations of features defined by the embodiments numbered subsequently:

[0026] 1. A high-pressure roller press (100, 200) for high-pressure crushing of a rolling material (101) in a roller gap (102, 202), comprising:

[0027] - two rollers (103, 103', 203, 203') moving in opposite directions, which form the roller gap (102, 202) between each other, through which the material to be crushed (101) passes during the crushing under high pressure and in which a fracture in the structural structure of the material (101) occurs in the roller gap (102, 202), and

[0028] a feeding device (104, 204) which feeds the compacted material (101) uniformly to the roller gap (102, 202), wherein the volume of the fed compacted material (101) forms a compression region (105, 205) extending from approximately the center of the roller gap (102, 202) to slightly beyond the center of the roller gap (102, 202),

[0029] - wherein a device for pre-compressing the milled material (101) in the form of a vibrating device (110, 210) is arranged above the compression area (105, 205) and reaches the vicinity of the compression area (105, 205), and

[0030] - wherein a metering slide (111, 211) is arranged in the feeding device (104, 204), and the feeding position and feeding amount of the rolling material (101) in the roller gap (102, 202) can be adjusted by means of the metering slide;

[0031] The vibration device (110, 210) is connected to the metering slide (111, 211), and the metering slide (111, 211) introduces the vibration energy of the vibration device (110, 210) into the compression area (105, 205).

[0032] 2. The high-pressure roller press according to embodiment 1,

[0033] The fin-shaped expansion portion (120, 121, 220) is arranged on the side of the metering slide (111, 211) facing the compacted material (101), and the expansion portion introduces the vibration energy into the compression area (105, 205).

[0034] 3. The high-pressure roller press according to embodiment 2,

[0035] The fin-shaped extension (220) of the metering slide (111, 211) on the side facing the rolling material (101) has an anti-wear edge (222) made of hardened steel or by surfacing on the upward-pointing side of the extension (220).

[0036] 4. The high-pressure roller press according to any one of embodiments 1 to 3,

[0037] The vibration device (110, 210) operates at a frequency between 10 Hz and 150 Hz, preferably between 10 Hz and 60 Hz, and the energy input to the compacted material (101) is 0.1 kJ / m 3 and 10 kJ / m 3 between, preferably between 0.1 kJ / m 3 and 1.0 kJ / m 3 between.

[0038] 5. The high pressure roller press according to any one of embodiments 1 to 4,

[0039] The vibration device (110, 210) has a regulating device (230) which regulates the vibration intensity according to the energy consumed by the device for operation, wherein increased energy consumption leads to a decrease in the vibration intensity and decreased energy consumption leads to an increase in the vibration intensity.

[0040] 6. The high-pressure roller press according to embodiment 5,

[0041] The regulating device (230) regulates the vibration intensity of the vibration energy of the vibration device in addition to the energy consumption of the roller drive unit, wherein increased energy consumption of the roller drive unit leads to reduced vibration intensity, and reduced energy consumption leads to increased vibration intensity.

[0042] 7. The high pressure roller press according to any one of embodiments 5 or 6,

[0043] The vibration device (210) is adjusted, inter alia, as a function of the gap width between the rollers (103, 103', 203, 203'), wherein an increased gap width results in an increased vibration intensity and a decreased gap width results in a decreased vibration intensity.

[0044] 8. The high pressure roller press according to any one of embodiments 6 or 7,

[0045] The vibration device (110, 210) is adjusted in addition to the vibration intensity of the roller (103, 103', 203, 203'), wherein the vibration intensity increases with increasing vibration amplitude or with increasing linear combination of selected oscillation frequency components and vice versa.

[0046] 9. The high pressure roller press according to any one of embodiments 1 to 8,

[0047] Therein, a manual activation device for the vibration device (210) is provided.

[0048] Figure 1 A sketch of a side view of a high-pressure roller press 100 with a metering slide 111 is shown. A vibrating device 110 is fixed to the metering slide 111, which sets the metering slide 111 in vibration. The compacted material in the feeding device 104 is fluidized by the vibrating metering slide 111. In this process, the trapped air L escapes from the compacted material 101. Depending on the position, the metering slide 111 reaches the vicinity of the compression area 105, where this compression area is highlighted by patterns and boundaries in the compacted material 101. The compacted material 101 is brought through the roller gap 102 by two counter-moving rotating rollers 103, 103', where the structural organization of the compacted material is broken and pulverized.

[0049] Figure 2 The following figure shows an alternative design for the metering slide 111. The metering slide 111 has fin-shaped extensions 120 that stand vertically on the surface of the metering slide 111, acting like guide plates. The extensions 120 introduce vibration energy into the compacted material 101. Because the metering slide 111 is positionable, the extensions 120 follow the metering slide 111.

[0050] Figure 3Another optional design of the metering slide 111 is shown. The metering slide 111 shown here has fin-shaped extensions 121, which also stand vertically on the surface of the metering slide 111 like guide plates. The extensions 121 introduce vibration energy into the compacted material 101. Because the position of the metering slide 111 is variable, the extensions 121 follow the metering slide 111. The special feature of the extensions 121 is that they are designed as a parallelogram and reach closer to the compression area 105 by means of an extension of the bottom of the extensions 121.

[0051] Figure 4 A sketch of a side view of another high-pressure roller press 200 with an optional metering slide 211 with a vibration device 210 is shown. The metering slide shown here can be adjusted in height like a water discharge device for a reservoir. Via the metering slide 211, the vibration device 210 introduces vibration energy into the compacted material 101 in the feeding device 204. Here, air L escapes from the compacted material at the drawn position, i.e. between the metering slide 211 and the adjacent wall of the feeding device. Depending on the position, the metering slide 211 also reaches the immediate vicinity of the compression area 205, where this compression area is highlighted by patterns and boundaries in the compacted material 101. The compacted material 101 is carried through the roller gap 202 by two rotating rollers 203, 203' moving in opposite directions, where the compacted material undergoes structural fragmentation and is pulverized. A regulating device 230 may be provided which regulates the vibration intensity and / or frequency and is linked to at least one input variable such as the rotational vibration of the rollers 203, 203', the vibration of the roller press frame, the energy consumption of the vibration device 210, the energy consumption of the roller drive.

[0052] Figure 5 Another optional design of the metering slide 211 is shown. The metering slide 211 shown here also has fin-shaped extensions 220, which also stand vertically on the surface of the metering slide 211 like guide plates. The extensions 220 introduce vibration energy into the rolling material 101. Since the position of the metering slide 211 is variable, the extensions 220 follow the metering slide 211. The special feature of the extensions 220 is that they are triangular in shape and have anti-wear edges (Schleiβkante) 222 on the upward-pointing edges. The anti-wear edges 222 are made of hardened steel or strengthened by build-up welding.

[0053] at last, Figure 6A diagram showing the roller gap width d over time t of a high-pressure roller press in operation is shown. Without the vibration of the vibration device, the rollers are subjected to significant impacts and vibrate with an amplitude that can no longer be ignored, which is caused by the irregular gap. This amplitude significantly loads the rolling rollers and also has a negative impact on the rolling efficiency. In the diagram, the vibration device is turned on after about 30 seconds. The roller gap now changes with a significantly smaller amplitude and thereby exhibits a significantly smoother and quieter operation. The smooth and quiet operation of the rollers places less load on the high-pressure roller press and improves the rolling efficiency with respect to the energy input and the necessary number of cycles of the rolled material, so that in the end, a finer rolled material is obtained with a smaller energy input, and the rolled material must pass through the high-pressure roller press with a smaller cycle.

[0054] Reference Signs List

[0055] 100 High Pressure Roller Press

[0056] 101 rolling material

[0057] 102 roller gap

[0058] 103 rollers

[0059] 103′ roller

[0060] 104 feeding device

[0061] 105 compression area

[0062] 110 vibration device

[0063] 111 dosage skateboard

[0064] 120 Development Department

[0065] 121 Development Department

[0066] 200 high pressure roller press

[0067] 202 roller gap

[0068] 203 roller

[0069] 203' roller

[0070] 204 feeding device

[0071] 205 compression area

[0072] 210 vibration device

[0073] 211 dosage skateboard

[0074] 220 Development Department

[0075] 222 anti-wear edge

[0076] 230 adjustment device

[0077] L Escaping air

Claims

1. A high-pressure roller press (100, 200) for high-pressure crushing of a rolling material (101) in a roller gap (102, 202), comprising: - two rollers (103, 103', 203, 203') moving in opposite directions, which form the roller gap (102, 202) between each other, through which the material to be crushed (101) passes during the crushing under high pressure and in which a fracture in the structural structure of the material (101) occurs in the roller gap (102, 202), and - a feeding device (104, 204), which feeds the compacted material (101) uniformly to the roller gap (102, 202), wherein: The volume of the milled material (101) fed creates a compression zone (105, 205) extending from approximately the center of the roller gap (102, 202) to slightly beyond the center of the roller gap (102, 202), -in, A device for pre-compressing the milled material (101) in the form of a vibrating device (110, 210) is provided above the compression area (105, 205) and reaches the vicinity of the compression area (105, 205), and - wherein a metering slide (111, 211) is arranged in the feeding device (104, 204), and the feeding position and feeding amount of the rolling material (101) in the roller gap (102, 202) can be adjusted by means of the metering slide; It is characterized by: The vibration device (110, 210) is connected to the metering slide (111, 211), wherein the metering slide (111, 211) introduces the vibration energy of the vibration device (110, 210) into the compression area (105, 205), The fin-shaped expansion portion (120, 121, 220) is arranged on the side of the metering slide (111, 211) facing the compacted material (101), and the expansion portion introduces the vibration energy into the compression area (105, 205).

2. The high pressure roller press according to claim 1, It is characterized by: The fin-shaped expansion portion (220) of the metering slide (111, 211) on the side facing the rolling stock (101) has a wear-resistant edge (222) made of hardened steel or by build-up welding on the upward-pointing side of the expansion portion (220).

3. The high pressure roller press according to claim 1, It is characterized by: The vibration device (110, 210) operates at a frequency between 10 Hz and 150 Hz, and the energy input to the compacted material (101) is 0.1 kJ / m 3 and 10 kJ / m 3 between.

4. The high pressure roller press according to claim 1, It is characterized by: The vibration device (110, 210) operates at a frequency between 10 Hz and 60 Hz, and the energy input to the compacted material (101) is 0.1 kJ / m 3 and 1.0 kJ / m 3 between.

5. The high pressure roller press according to claim 2, It is characterized by: The vibration device (110, 210) operates at a frequency between 10 Hz and 150 Hz, and the energy input to the compacted material (101) is 0.1 kJ / m 3 and 10 kJ / m 3 between.

6. The high pressure roller press according to claim 2, It is characterized by: The vibration device (110, 210) operates at a frequency between 10 Hz and 60 Hz, and the energy input to the compacted material (101) is 0.1 kJ / m 3 and 1.0 kJ / m 3 between.

7. The high pressure roller press according to any one of claims 1 to 6, It is characterized by: The vibration device (110, 210) has a regulating device (230) which regulates the vibration intensity as a function of the energy consumed by the device for operation, wherein an increased energy consumption leads to a reduced vibration intensity and a reduced energy consumption leads to an increased vibration intensity.

8. The high pressure roller press according to claim 7, It is characterized by: The regulating device (230) additionally regulates the vibration intensity with respect to the vibration energy of the vibration device as a function of the energy consumption of the roller drive, wherein increased energy consumption of the roller drive results in a reduced vibration intensity and reduced energy consumption results in an increased vibration intensity.

9. The high pressure roller press according to claim 7, It is characterized by: The vibration device (210) is additionally adjusted depending on the gap width between the rollers (103, 103', 203, 203'), wherein an increased gap width results in an increased vibration intensity and a decreased gap width results in a decreased vibration intensity.

10. The high pressure roller press according to claim 8, It is characterized by: The vibration device (210) is additionally adjusted depending on the gap width between the rollers (103, 103', 203, 203'), wherein an increased gap width results in an increased vibration intensity and a decreased gap width results in a decreased vibration intensity.

11. The high pressure roller press according to any one of claims 8 to 10, It is characterized by: The vibration device (110, 210) is additionally adjusted depending on the vibration intensity of the roller (103, 103', 203, 203'), wherein the vibration intensity increases with increasing vibration amplitude or with increasing linear combination of selected oscillation frequency components and vice versa.

12. The high pressure roller press according to any one of claims 1 to 6 and 8 to 10, It is characterized by: Manual activation means are provided for the vibration means (210).

13. The high pressure roller press according to claim 7, It is characterized by: Manual activation means are provided for the vibration means (210).

14. The high pressure roller press according to claim 11, It is characterized by: Manual activation means are provided for the vibration means (210).

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