JPH11248349A - Vibration treating apparatus for powder particle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration treating apparatus for powder particles for improving mixing flowability of the particles without depending upon a means for arranging a member therein. SOLUTION: The vibration treating apparatus comprises a cylindrical treating container 12 introduced with a material of powder particle or to be treated to become powder particle after the introduction and disposed on an elastic member so that an axis L becomes substantially horizontal, and an oscillator (driving means) 16 for giving a vibration to the container 12. In this case, the container 12 has a truncated conical shape having at least one treated material discharge port 44 substantially directly under the axis L and a material-to-be- treated discharge port 44 at its large diameter side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration processing apparatus for a granular material. In particular, the present invention is a preferred invention as a vibration drying apparatus for a granular material.

Here, a vibration heating and drying apparatus for a granular material is
The description will be made mainly by way of example, but is not limited to this. For example, the present invention is applicable to a reduced-pressure drying device, a freeze-drying device, a granulation device, a reaction device, a fermentation device, and the like.

[0003] The term "granules" as used herein is a concept including, in a narrow sense, not only powders having a particle size of 0.1 µm or less, but also particles and granules exceeding 0.1 µm (edited by the Society of Chemical Engineers, Japan). Dictionary of Chemical Engineering ”(May 30, 1974) Maruzen, p415
reference).

[0004]

BACKGROUND ART As a drying apparatus used in the final step of a powdery drug in the field of fine chemicals, there has been the following apparatus.

[0005] A cylindrical processing container into which a powdery material to be dried is charged is disposed (horizontally) so that the axis is substantially horizontal.
A rotary blade is provided inside the processing container, and a jacket for flowing a heat medium around the outer periphery of the cylindrical body is provided.The heating medium is heated by the heat medium flowing in the jacket in the process of stirring the granular material to be dried by the rotary blade. Some are to be dried.

However, the drying apparatus has the following problems (see Japanese Patent Publication No. 55-37944).

[0007] The gap between the rotating blades and the inner peripheral surface of the cylindrical processing vessel forms a dead space, making it difficult to sufficiently agitate the powder and granules. In addition, there is a fear that the gaps are clogged with the powder and granules and are crushed.

In particular, as in the field of fine chemicals, high-purity, low-volume production and high purity are required.
That is, in the case where the contamination of the drug with impurities (so-called contamination) is extremely disliked, it is not desirable to have mechanical parts such as rotating blades inside. That is, it is necessary to completely clean and remove other chemicals attached to the corners and intersections of the rotating shaft seal portion and the rotating blades, which requires cleaning man-hours.

[0009] Therefore, the applicant of the present application first vibrates the cylindrical processing container to make the powder particles in a floating state, so that the entire powder particles can be uniformly dispersed without breaking the particles. A powder drying apparatus (powder processing apparatus) capable of stirring and uniformly heating the whole has been proposed, manufactured and sold (see the claims in the publication).

[0010] As a continuous drying apparatus based on the same technical idea, Japanese Patent Publication No. 60-13742 / 63.
Japanese Patent No. 63241/63 and the like.

[0011] In the batch type drying apparatus based on these same technical ideas, there is an increasing demand for further improvement in drying efficiency.

As means for improving the drying efficiency, it is conceivable to provide a heat transfer fin or a single cylindrical member through which the heat medium flows (see JP-B-60-13742). Although it is not as good as the case of providing the above-mentioned rotating blades to cope with the transmission fins or the like, it is not desirable from the viewpoint of cleaning the inside of the container at the time of the batch change.

The present invention has been made in view of the above, and has as its object to provide a vibration processing apparatus for a granular material capable of improving the mixing fluidity of the granular material without using a means for disposing a member inside. Aim.

Another object of the present invention is to improve the mixing fluidity of powder and granules without using a means for disposing members inside.
An object of the present invention is to provide a vibration drying apparatus for a granular material that can improve the drying efficiency.

[0015]

Means for Solving the Problems In order to solve the above-mentioned problems, the inventors of the present invention, while making efforts for development, make a horizontally disposed cylindrical processing vessel into a frustum-shaped cylinder, and By generating a circular or elliptical vibration mainly around the axis in the processing vessel, it is possible to obtain good fluid mixing properties, and thus, it has been found that the drying efficiency can be improved.
The present inventors have conceived a vibration processing apparatus for a granular material having the following configuration.

An object to be treated, which is a powder or granules or after being charged, is charged, and a cylindrical processing container arranged on an elastic body so that an axis is substantially horizontal, and vibration is applied to the processing container. A vibration processing apparatus provided with an oscillator to be provided, wherein the processing object discharge port is formed in a truncated cone shape having a large-diameter end.

In the above configuration, it is desirable that the oscillator generates circular vibration or elliptical vibration mainly around the axis in the processing container, in order to improve the mixing fluidity of the powder and granules.

Further, it is desirable that the processing vessel is provided with a temperature control means on the peripheral wall, because the versatility of the apparatus is increased.

Further, it is preferable that the processing vessel is formed in a double truncated conical shape with an intermediate bulge, and both ends are formed of end plates in order to further improve the rheological flowability of the granular material.

In the above-mentioned vibration processing apparatus for a granular material, if an exhaust port is formed in the processing container, the apparatus becomes a vibration drying apparatus for a granular material.

Further, if vacuum suction means is connected to the exhaust port, drying efficiency can be improved.

[0022]

According to the vibration processing apparatus for a granular material of the present invention, the granular material P or the material that becomes the granular material after being charged into the processing vessel 12 is obtained by the method shown in FIGS. ), The processing vessel 1
It is introduced so that the apparent bulk amount of No. 2 is about 60 vol% or more. Then, vibration is applied to the processing container 12 by an oscillator. At this time, the vibration generated in the processing container usually includes an elliptical or circular vibration about the axis L (see the arrow in FIG. 1A). Then, the apparent cross section of the granular material has a shape as shown by a two-dot chain line W1 in FIG. On the small-diameter side, the granular material is more likely to directly receive vibration energy, and the kinetic energy of each particle on the small-diameter side (end side) increases as compared with the large-diameter side.
Therefore, as shown by the two-dot chain line W2 in FIG. Then, a force acts in a direction to attenuate the swelling, and the granular material moves to the large diameter side, and the granular material at the bottom also moves to the large diameter side by gravity. The large-diameter side swells as shown by the chain line W3. Then, a reaction occurs from the wall surface on the large diameter side, and then moves to the small diameter side in reverse, and the small diameter side rises as shown by the two-dot chain line W2 in FIG. 1 (b). Thus, the swelling motion similar to the ebb and flow of the tide reciprocating in the axial direction is generated in the granular material together with the rotation motion about the axis of the processing container.

Therefore, the mixing fluidity of the granules increases, and when used as a drying device, the drying efficiency naturally also increases.

In a configuration in which only the bottom surface is inclined toward the processed material discharge port as disclosed in JP-A-6-307774, the diameter of the side opposite to the processed material discharge port side is not reduced as a whole. Action and effect cannot be expected.

As a matter of course, the effect is remarkable when the processing container is mainly subjected to circular or elliptical vibration around the axis.

[0026] Further, the processing vessel has a double truncated conical shape with an intermediate swelling and both ends are formed by end plates, so that there is no corner and the swelling motion reciprocating in the axial direction is smoother. Can be done. In addition, as a secondary matter, cleaning at the time of changing the object to be processed is further facilitated, and the discharge of the processed object from the processing container becomes quick and smooth.

Further, when an exhaust port is formed in the processing container and a vacuum suction means is connected to the exhaust port as required, the apparatus can be suitably used as a vibration drying apparatus for powder and granular materials.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

(1) FIGS. 2 to 4 show an example of a horizontal vibration heating and drying apparatus showing an embodiment of the present invention.

The basic configuration of the present apparatus is a cylindrical processing vessel in which a material to be processed, which is a powder or a powder after being charged, is charged and disposed on the elastic body 14 so that the axis L is substantially horizontal. 12
And an oscillator (driving means) 16 for applying vibration to the processing container 12.

Here, the powdery material after being charged is described in
As described in JP-A-3-63241, when a liquid containing a solute (including a muddy body) is dried (solvent volatilization) after being charged to form powder or granules, or when the liquid reacts or freezes to form a powder. The case where the powder is formed further includes the case where the powder is formed into a granule by a granulating action.

Here, the inlet 18 is formed on the ceiling wall side. The position of the charging port 18 is not limited to this, but may be any position such as an upper portion on both end wall surfaces as long as it is a position where the granular material can be charged. For example, when the capacity of the processing container 12 is 1000 L, the opening diameter is set to 8 to 10 cm. Hereinafter, the design specifications of the processing container 12 and the like are specifications when the capacity of the processing container 12 is 1000 L, unless otherwise specified.

The elastic body 14 is a coil spring,
It is arranged on the second support column 32 a and supports the processing container 12 via the bracket 34. If the elastic body has elasticity and strength capable of absorbing the vibration applied to the processing container 12,
There is no particular limitation.

As such an elastic body, a leaf spring, an air spring, a rubber-like elastic body, or the like can be used. In the case of a coil spring, it is desirable that the coil spring be wrapped with an elastomer material because it can utilize the damping performance of rubber-like elasticity in addition to spring elasticity.

In the illustrated example, the oscillator 16 includes an oscillating section 24 having unbalanced weights 22 arranged on both sides, and a universal joint 26.
Is a mechanical type that is rotated by a prime mover (motor) 28 through a motor. Depending on the processing amount, the required frequency, and the type of vibration, not only the mechanical type but also the electromagnet type and the vibration motor type can be used alone or in combination with the mechanical type as necessary. Well, the connection between the oscillator 16 and the processing vessel 12 is
The oscillating portion 24 is attached to the downwardly extending portion 34a of the bracket 34.

At this time, the vibration imparted to the processing container 12 is mainly for imparting circular vibration or elliptical vibration around the axis, so that the effect of the present invention (mixing fluidity of powders and granules) is surely improved. Desirable to let. The type of vibration may be vertical or oblique linear vibration, or horizontal linear or circular / elliptical vibration.

Further, the mounting position of the oscillator 16 is generally located almost directly below the processing container 12. As shown in FIG. 5, the oscillator 16 may be provided on one side of the processing container 12 at the height of the axis L, and also on the laterally extending portion 34b of the bracket 34. In this case, it is necessary to arrange the balance weight 17 on the opposite side. Circular vibration can be imparted to the processing container 12 with more energy efficiency than when the oscillator 16 is disposed immediately below the processing container 12.

Further, a pair of transmitters 16 may be provided on both sides of the processing container 12, which may impair the cleaning performance. However, the transmitters 16 may be provided at the axis of the processing container 12.

The frequency and the vibration pitch vary depending on the processing procedure and the required mixing fluidity. For example, when used for powder heating and drying, the frequency is 500 to 1800.
cpm, vibration pitch: 10 to 0.5 mm. Here, the vibration pitch is usually set smaller than the increase in the frequency.

The temperature control means is a jacket 30 which is piped so as to allow a heat medium such as superheated steam or a refrigerant to pass therethrough.
Although the position of the steam inlet 31 to the jacket is not particularly limited, in the present embodiment, the steam inlet 31 is provided at a peripheral wall portion of a dust collecting cylinder 38 described later. The temperature control means is not limited to this,
A coil for resistance heating and induction heating is wound around the processing vessel 12, a microwave oscillator is mounted on the ceiling to be used in combination with microwave heating, and a planar chemical reaction heating element is wound around the processing vessel. Is also good.

This processing container is provided with an exhaust port 36 because it is a drying device. Specifically, an exhaust port 36 is formed through a dust collection tube 38 formed at the center of the processing container 12 on the ceiling side in order to prevent leakage of the powder (dust) outside the processing system.

The dust collecting tube 38 has a structure in which a plurality of bag filters 42 are suspended from a holding plate 40 at an intermediate height. The inside diameter of the dust collection tube 38 is 40 to 50 cm. When the exhaust port 36 is not interposed through the dust collection tube section 38, a vacuum suction means (not shown) such as a vacuum pump or a compressor can be connected, though not indispensable. At this time, the vacuum suction capacity is a suction capacity of 1 to 1.5 Nm ³ / min or an absolute pressure of 5 to 10 Torr in the processing vessel 12.
(0.5 to 1 kPa). And

(2) The processing container 12 of the present embodiment has at least one processed material discharge port 44 substantially immediately below the axis L in the above, and the processing object discharge port 44
Is a frustum cylindrical shape having at the large diameter end.

The reason why the processed material discharge port 44 is formed at the large-diameter end is to facilitate discharge of the processed material.

In the illustrated example, the processing vessel 12 has a double truncated conical shape with an intermediate bulge, and both ends are formed by end plates. The processed material discharge port 44 is formed by a bellows hose 48 via a discharge valve 46. By adopting the two-point frusto-conical shape, it is possible not only to increase the processing capacity but also to discharge the processed material from the discharge port more quickly and smoothly.

Further, since both ends are formed by the end plates 12a, no sharp corners are generated, and the mixing fluidity is further improved. This is true even when both ends of a single truncated cone as shown in FIG. 1 are formed by end plates.

At this time, the taper angle of the truncated cone (the angle of intersection with the axis) depends on the capacity of the processing vessel 12 (ie, the average diameter and length of the truncated cone), but is preferably 5 ° to 40 °, and more preferably, 5 ° to 40 °. 10 ° to 30 °. If the taper angle is too small or too large, the improvement of the mixing fluidity of the present invention cannot be expected, and the discharge speed (dischargeability) from the discharge port also decreases.

The average diameter (central diameter) and length (height) of the truncated cone are usually 75-120 cm for the former and 1 for the latter.
20 cm to 75 cm.

Here, the double truncated cone as shown in FIGS. 2 to 5 has been described as an example. However, a configuration in which two pairs of double truncated cones are connected as shown in FIG. The frustum shape is not limited to a cone, and may be a polygonal frustum shape (a hexagonal frustum shape, etc.), and the number and method of connection of the frustum shape are arbitrary as long as the effects and effects of the invention are exhibited.

Although it is not inevitable, the mixing fluidity may be alienated and the cleaning workability may be impaired. However, if necessary, the heat transfer fins 50 may be provided as shown in the figure.

In the figure, reference numeral 52 denotes a manhole for cleaning and the like, and reference numeral 54 denotes a viewing window for checking the inside.

(3) Next, in the above-mentioned horizontal type vibration drying apparatus,
The usage mode will be described.

First, an object to be processed is introduced into the processing container 12 through the inlet 18 by 50 to 80% by volume, preferably 60% by volume.
Add ~ 70% by volume. If the input amount is too small, it is difficult to obtain the effect of improving the mixing fluidity of the present invention due to the frustum shape. The diameter of the powder is preferably 1 μm to 5 mm, and more preferably about 0.1 to 1 mm, so that the effect of improving the mixing fluidity is easily obtained. The powder has a true specific gravity of 0.5 to 10, preferably 0.
8 to 2 is desirable from the viewpoint of improving the mixing fluidity.

Next, the motor 28 is started and the oscillator 16 is turned on.
Is driven to apply vibration to the processing container 12,
Steam (pressurized / depressurized) at a predetermined temperature is caused to flow into the jacket 30 via the steam inlet 31. In order to maintain a predetermined temperature, a pipe (not shown) provided with a drain valve that opens and closes at a predetermined pressure is connected to the jacket 30 via a bellows hose or the like. Depending on the material of the processing object (powder), the steam is allowed to pass before charging the processing object, and the processing vessel 1
2 may be heated. Hot water may be used instead of steam.

The driving horsepower of the oscillator varies depending on the processing amount, but is, for example, 5.5 to 7.5 kW.
The driving specifications of No. 6 differ depending on the type (particle diameter / specific gravity) and the filling amount of the granular material, but as described above, the vibration frequency is 500 to 180.
0 cpm and a vibration pitch of 0.5 to 10 mm. At the same time, a vacuum pump or the like is operated to perform vacuum suction and continue the drying process.

Then, as shown in FIG. 7, the temperature and vacuum pressure of the processing object change, the temperature of the processing object becomes asymptotic to the heating temperature, and the degree of vacuum in the processing chamber 12 is reduced by a vacuum pump (vacuum suction). When the asymptotic parallel state is reached, the operation is stopped, that is, the oscillator and the vacuum pump are stopped, and the steam valve is closed if necessary.

At this time, the processed material in the processing container 12 has a good mixing fluidity, as described above, and is thus dried quickly and uniformly.

After the operation is stopped, the discharge valve 46 is opened to discharge the processed product (the dried product) from the discharge port 44. At this time, the oscillator 16 is activated and the processing vessel 1
By applying vibration to 2, the dried product can be easily discharged. The frequency at the time of discharging the processed material may be an output, a pitch, and the number of rotations which are relatively smaller than those at the time of the drying process. At this time, for example, the frequency: 1500 to 300 cp
m, vibration pitch: 0.5 to 10 mm.

The type of vibration may be circular or elliptical vibration, but is not limited as long as it has a function of accelerating the falling of the granular material on the frustum-shaped slope. In this case, it is conceivable to attach a discharge oscillator different from the mixing oscillator in the drying process to the processing container.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing the mixing fluidity of powder and granules in a processing vessel in a vibration processing apparatus of the present invention.

FIG. 2 is a schematic plan view of a horizontal vibration dryer in one embodiment of the present invention.

FIG. 3 is a schematic side sectional view of the same.

FIG. 4 is a schematic front view of the same.

FIG. 5 is a schematic front view in which an oscillator is provided on one side of the height of the axis in the embodiment of FIGS. 2 to 4;

FIG. 6 is a schematic side sectional view of an embodiment in which FIG.

FIG. 7 is a conceptual graph of drying when a processed material is dried using the processing apparatus of the present invention.

[Explanation of symbols]

 12 Processing Container 14 Elastic Body (Coil Spring) 16 Oscillator 30 Temperature Control Means (Jacket) 36 Exhaust Port 38 Dust Collection Tube 44 Treated Material Discharge Port

Claims (7)

[Claims] An object to be processed, which is a powder or a granule after being charged, is charged, and is disposed on an elastic body so that an axis thereof is substantially horizontal. In a vibration processing apparatus provided with an oscillator (driving means) for applying vibration, the processing container has at least one processed material discharge port substantially immediately below the axis, and the processing object discharge port. A vibrating apparatus for a granular material having a truncated frustum shape having an outlet at a large-diameter end. 2. The vibration processing apparatus for a granular material according to claim 1, wherein the oscillating device applies circular or elliptical vibration mainly around an axis to the processing container. 3. The vibration processing apparatus for a granular material according to claim 1, wherein the processing container is provided with a temperature control means on a peripheral wall. 4. The vibration processing apparatus for a granular material according to claim 3, wherein the processing container has a double truncated conical shape with an intermediate bulge, and both ends are formed by end plates. 5. The vibration processing apparatus for a granular material according to claim 1, wherein the processing container has a double truncated conical shape with an intermediate bulge, and both ends are formed by end plates. 6. The vibration drying apparatus for a granular material according to claim 1, wherein the processing container has an exhaust port. 7. The vibration drying apparatus for a granular material according to claim 6, wherein a vacuum suction means is connected to the exhaust port.