JP2001293348A - Vibration flowing device for granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration flowing device for a granule controlling the circulation behavior generated by the vibration flows of granule without using a fluid such as air, gas or the like or a solid medium or the like such as impact balls or the like in a manner of being rich in variation in the range from the slight swelling to the diffusion in the atomized state, demonstrating high speed circulating flows all over the surface while the granule is dispersed uniformly by the circulating flows, not requiring a complicated mechanism constitution and carrying out at a high speed the composite treatments including the crushing and pulverizing for cohesive powder and the dispersing, mixing, drying and the like for the granule. SOLUTION: A granule treatment means is characterized by a constitution of a container 2 linked to a vibrating means 1 and an amplifying means amplifying the vibration of the container 2 to vibrate and treat the granule 3 in the container by the vibration generated by the amplifying means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the disintegration of agglomerated powder,
The present invention relates to a vibrating fluidizer for a granular material used for dispersing, mixing, drying, reacting with a spray gas or the like, or forming a thin film on the surface of the granular material.

[0002]

2. Description of the Related Art Generally, when a vertical vibration is applied to a container filled with a granular material (a granular material layer), the granular material layer flows in the container. It is known that the state of the flow changes variously according to the frequency (frequency) and amplitude of the vibration to be applied. The behavior of the oscillating flow caused by the relative motion between the powder layer and the container is, as shown in the flow pattern of FIG. The movement of the granular material causes the surface of the granular material layer to incline, and then a circulating flow (convection) from the center of the granular material layer toward the container wall occurs as in pattern C1. At this time, if the velocity of the circulation flow is slow, the surface of the vibrating granular material is flat, but if it becomes active, the surface of the granular material slightly rises. When the centrifugal effect is further increased, the pattern C
It is said that the direction of the circulating flow is reversed as shown in FIG. 2, and then a local circulating flow is generated in the powder layer as shown in pattern D, and a unique wave appears on the surface of the granular material.

[0003] However, if only the vibration is applied to the container, the behavior of the oscillating flow in the granular material layer is limited to a range in which a predetermined circulating flow is generated with the above-mentioned slight swelling. It appears as a different phenomenon depending on the location, and is an unstable flow factor. On the other hand, the response of the granular material layer to the vibration amplitude and frequency has not yet been sufficiently analyzed, and the oscillating flow is also an unpredictable phenomenon. There is no affirmation that appears repeatedly on the surface of the granular material layer while being dispersed, and the circulating flow also mixes, reacts,
It cannot be said that it is a high-speed one suitable for various kinds of granular material treatment such as surface treatment. In addition, as the processing apparatus directly utilizing the vibration flow of the granular material, there are only a discharging device, a sieving device, a transport device, and the like, and the actual use range is limited. In recent years, where high-speed technology and uniform processing are demanded, the disintegration of agglomerated powder, the dispersion and mixing of powders, the reaction with spray gas, the formation of a thin film on the powder surface, etc. It has been desired to develop a vibrating and flowing device for granular materials in which the above processes can be performed and these processes can be performed in a short time, and the vibrating flow can be used even in a vacuum environment. It is to be noted that a vibration mill that pulverizes the granular material by peculiar circular vibration is known, but this is a method in which a medium such as a sphere is provided with a circular vibration trajectory in a cylindrical container, and the container is provided with a container. This spherical medium (shock sphere) collides with the inner wall to pulverize the granular material between the inner wall of the container and the shock sphere. From this viewpoint, the circulating flow of the granular material itself is used. It is not done and cannot be adopted.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned problems, and uses a fluidizing medium such as air or gas, or a solid medium such as an impact ball. Circulatory behavior due to vibrational flow of powder
Even if different circulation flows occur depending on the location in the container,
All the particles are uniformly dispersed by the circulating flow, and can be repeated all over the surface of the particles layer instantaneously and instantaneously and repeatedly. It is capable of performing complex processing such as crushing of a body, dispersion, mixing, drying of a granular material, reaction with a spray gas or the like, or formation of a thin film on the surface of a granular material in a short time. Further, the circulation behavior can be varied and controlled from a circulating flow with a slight bulge to a circulating flow that is diffused in a spray form. Not only can it be carried out, but it is also possible to obtain good circulation behavior even under a special environment such as a vacuum state, so that the overall mechanical configuration is not particularly complicated, and the powder that facilitates miniaturization can be obtained. It is an object of the present invention to provide a vibrating fluidizing device for granules.

[0005]

Means for Solving the Problems Technical means adopted by the present invention for solving the above-mentioned problems are as follows.
A container formed in cooperation with the vibrating means, and an amplifying means for amplifying the vibration of the container, wherein the vibrating action generated by the amplifying means is configured to vibrate the particles in the container. Is what you do.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described in detail based on a vibrating fluidizing apparatus for a granular material exemplified as a preferred embodiment. 1 to 3, FIG.
It is a partially broken whole view of an oscillating flow device. Reference numeral 1 denotes a vibration device as a vibration means.
In an electric vibration device as disclosed in Japanese Patent No. 193911, a cylindrical central magnetic pole integrally provided on a lower surface of a shaking table 101 and a driving coil are provided on an outer peripheral surface of the central magnetic pole so as to face each other. A fixed magnet mechanism having one of the N-pole and the other as the S-pole, and supplying an alternating current to the drive coil, thereby forming a gap between the two magnetic poles in the fixed magnet. A mechanism is provided in which the drive coil vibrates up and down in a magnetic field and applies an exciting force to the vibration table 101. The method (principle) of generating the vibration is not limited to the above-described electromagnetic vibration, but may be an ultrasonic vibration, a magnetostrictive vibration, a vibration caused by imbalance of an electric motor, or any combination of these vibration generating methods. , Vertical vibration, left and right vibration and a composite vibration thereof.

Reference numeral 2 denotes a container mounted on the shaking table 101 together with a transparent cylindrical case 2a made of resin.
The vibration table 1 generated in cooperation with the operation of the vibration device 1
01 is directly transmitted.
The container 2 is filled with the granular material 3, and a plate-like body 4 made of a rubber sheet material is provided at the bottom of the container as a means for subjecting the granular material 3 to vibration treatment. In addition, a plurality of metallic spherical floating bodies 4a interposed between the plate-like body 4 and the container 2 are laid in a laid state as an aggregate, and constitute amplification means for amplifying the vibration of the container 2. ing. That is, the container 2 and the floating body 4a are a set of different types of vibrators that give different vibrations to the plate-like body 4, and the vibration from the container 2 that constitutes one of the different types of vibrators and the other When the container 2 receives the direct vibration from the vibration device 1 due to the cooperative relationship enjoyed by the constituent floating bodies 4a, the exciting force is applied indirectly to the floating bodies 4a via the container 2, The floating body 4a vibrates up and down and collides with the plate-like body 4. At this time, a complex different vibration action of vibration of the container 2 and vibration due to the impact of the floating body 4a is applied to the plate-like body 4, and the vibration of the container 2 is amplified. Is fluidized.
In the present embodiment, the entire container vibrates in the cooperative relationship between the vibration device 1 and the container 2, but only the container bottom may be vibrated. The configuration is arbitrary as long as the vibration applied to the container 2 is amplified and applied to the granular material 3 in the container 2. In addition, the shape of the floating body 4a may be a bar, a tube, or a plate instead of a spherical one, and the material may be metal,
It may be rubber, resin or the like, and a combination of these is also optional. Further, the material of the plate-like body 4 is not limited to a rubber-like material, but may be any metal or resin, and the shape is not limited to a planar shape. In addition, the floating body 4 a may be laid on the upper surface of the plate-like body 4 to process the granular material 3.

Next, a description will be given of an experimental example on the behavior of the oscillating flow of the granular material using the oscillating flow device configured as described above. As the vibration device 1, an electric micro-vibrator (MES451) manufactured by Akasi Corporation was used. On the plate-like body 4, a hard rubber sheet having a thickness of about 2 mm
, Iron balls having an average particle size of 5 mm were used. And
For the granular material 3 to be treated, polyethylene particles (white) having an average particle diameter of 5 μm are used, and the granular material layer is formed by filling the container 2 to a height of about 1 cm.
A vibration with a frequency of 0.1 to 10 mm was applied to the sample. FIGS. 2 (A) and 3 (A) show the behavior of the oscillating flow.
2A and 2B, and FIGS. 2B and 3B are explanatory diagrams of the state, respectively. Each figure (B)
FIG. 9A is a diagram in which the flow state is clarified by adding a color tone process for contrast and light / dark tone and a border diagram to those shown in FIG.

First, when a small vibrating force due to the vertical vibration of the vibrating device 1 is applied to the granular material 3 in the container 2, as shown in FIG.
While moving to the outer peripheral side and the center side of the container 2, the granular material 3 existing on the surface of the granular material layer instantaneously moves to the bottom of the container 2, and appears again on the surface after 2-3 seconds. Indicated. This behavior is obtained by observing the flow behavior with respect to mixing and dispersion from a state in which a small amount of colored particles (red) having an average particle size of about 100 μm are placed on the central portion of the surface of the granular material layer. In the initial vibration stage, which is a comparatively small excitation force, a good circulation of the colored particles appearing all over the surface of the granular material layer again while being instantaneously and uniformly dispersed throughout the container 2. It was confirmed that a stream was being generated. Thus, it was found that even powders having different physical properties (particle diameter, density, etc.) were uniformly mixed and dispersed in a short time.

Next, the flow behavior was observed by gradually increasing the excitation force. As shown in FIG. 3, the flow behavior in which the powder 3 was violently diffused upward in a mist state was confirmed. This state will be described with reference to FIG. 3 (B). In the initial state in which the excitation force is increased, the behavior of the granular material 3 diffusing into a column shape that can be flipped up by the vibration of the plate-like body 4 is shown. Indicated. At that time, the aggregation of the granular material 3 was confirmed at the top of the columnar diffusion flow, but when the excitation force was further increased,
These aggregates gradually disappeared and exhibited a flow behavior in which the whole was diffused in a mist state as shown in FIG. In this diffusion flow state, the granular material can be treated in the same manner as in the conventional method using air, gas, or the like as the fluid medium. It does not require a compressor, an air filter and a solid-gas separation device,
Equipment costs and running costs can be reduced. Further, there is an advantage that the container 2 itself can be reduced in size.

In the above experimental example, the flow environment was gradually decompressed to 1 × 10 ⁻⁸ Torr (1.33 μPa).
When the behavior of the oscillating flow was confirmed in an ultra-high vacuum state, the vibrating flow of the present invention required a more vibrating force than the state of normal pressure in diffusing and flowing the granular material 3. Even under the environment (in a depressurized container), the behavior was confirmed. Therefore, a physical vapor deposition method (such as vacuum deposition, sputter deposition, or laser abrasion) (P
(VD method), that is, a technique in which a solid target containing constituent atoms of a target thin film is formed into atoms, molecules, and clusters by physical action, transported to the substrate surface, and a thin film is formed, applied to a powder or a granular material. In this case, a good circulating flow is generated even with the granular material placed in the vacuum chamber,
There is an advantage that a thin film can be uniformly (continuously) formed continuously or discontinuously on the surface of each particle constituting the powder.

The flow behavior when only the conventional container 2 is vibrated is compared and observed using colored particles in the same manner as described above.
It took about 1 minute to cover all the colored particles and not to be visible from the surface. Furthermore, even if the vibration with the increased excitation force is applied, the colored particles do not appear again on the surface of the granular material layer, a good circulating flow for dispersion and mixing is not generated, and the conventional vibration method hardly flows. Was confirmed.

According to the above technical means, the circulating behavior of the granular material due to the oscillating flow can be varied depending on the location in the container without using a fluidizing medium such as air or gas, or a solid medium such as impact balls. Even if a flow occurs, all the particles are uniformly dispersed by the circulating flow and can appear all over the surface of the particle layer and instantaneously and repeatedly. Direct and complex processing such as disintegration of agglomerated powder, dispersion and mixing of powders, mixing, drying, reaction with spray gas, etc., or formation of a thin film on the surface of powders and granules in a short time Is what you can do. Further, the circulation behavior can be varied and controlled from a circulating flow with a slight bulge to a circulating flow that is diffused in a spray form. Not only can it be performed, but it is also possible to obtain good circulation behavior even in a special environment such as a high vacuum state, so that the overall mechanical configuration does not become particularly complicated and downsizing is facilitated. I can do this.

The behavior mechanism of the above-mentioned oscillating flow has not been sufficiently analyzed or elucidated mechanically, and is a phenomenon that is difficult to predict, but seems to have the following effects. The vertical vibration energy of the vibration device 1 is indirectly transmitted to the granular material 3, the plate-like body 4, and the floating body 4a via the container 2 directly linked to the vibration device 1. The plate-like body 4 and the floating body 4a also move up and down due to physical properties such as mass, size, shape, and material of the plate-like body 4 and the rotational movement when the floating body 4a is an independent assembly such as a sphere and a columnar body. In addition, each induces its own vibration energy.

The container 2, the plate-shaped body 4, and the floating body 4 a form different vibration (different vibration) bodies, respectively, and a composite energy is transmitted to the powder 3 by a joint vibration action. At this time, if the excitation force is small, the effect of the amplified vibration action due to the impact vibration by the floating body 4a is small. Although a vibrating action is given and the fluidized bed is smooth, a better vibrating fluidized bed (circulating flow) is formed as compared to the case of the vibrating action of the container 2 alone. In addition, if the exciting force is large, the influence of the amplified vibration action due to the impact vibration by the floating body 4a becomes large, and a complex heterogeneous vibration action centered on the impact vibration energy is applied to the granular material 3. Thus, a good fluidized bed in the form of a column or a mist is formed.

In the process of increasing the excitation force, a vertical diffusion movement of the granular material 3 was observed in a columnar diffusion flow synchronized with the vertical vibration of the plate member 4. Then, the ascending and descending movements of the granular material 3 were dispersed in units of particles, and appeared as a circulating flow that changed to mist-like diffusion. As a result, a diffused good fluidized bed is formed, and the granular material 3 exhibits such a behavior that the granular material 3 appears uniformly and repeatedly on the surface of the granular material layer while being uniformly dispersed at high speed. It is presumed that the above-described amplified vibration action by the heterogeneous vibration improves the vibration flow behavior.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an apparatus for vibrating and flowing a granular material.

FIG. 2 is a drawing-substituting photograph (A) illustrating the behavior state of Experimental Example 1 and an explanatory diagram thereof (B).

FIG. 3 is a drawing-substituting photograph (A) illustrating the behavior state of Experimental Example 2 and its explanatory diagram (B).

FIG. 4 is an explanatory diagram showing a behavior pattern of vibration flow of a general granular material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration apparatus 101 Shaking table 2 Container 3 Granular material 301 Ejection flow of granular material 302 Ejection flow of granular material 4 Vibration medium 401 Spherical body 402 Perforated plate

Claims (7)

[Claims] 1. A method for treating a granular material, comprising: a container cooperating with a vibrating means; and an amplifying means for amplifying the vibration of the container. A vibration processing apparatus for a granular material, wherein the vibration processing is performed on the granular material. 2. A vibration processing apparatus for a granular material according to claim 1, wherein said vibrating means cooperates to apply a vertical vibration to a bottom portion of said container. 3. A vibration processing apparatus for a granular material according to claim 1, wherein the vibration action is a joint vibration action of the vibration by the amplification means and the vibration of the container. 4. The floating body according to claim 1, wherein said amplifying means is provided on a plate-shaped member provided in said container so as to be separated from a bottom thereof, between said plate-shaped member and said container. A vibration processing apparatus for a granular material, characterized in that the vibration processing apparatus is configured to impact the powder. 5. A vibration processing apparatus for a granular material according to claim 4, wherein said plate-like body is made of a rubber sheet material, a metal material or a resin material. 6. An apparatus according to claim 2, wherein said floating body is a plurality of spherical bodies made of metal, resin or rubber. 7. A vibration processing apparatus for a granular material according to claim 1, wherein said processing means for the granular material is used in a vacuum.