JPH07106306B2 - Medium disperser - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium disperser for dispersing a processing material using a dispersion medium.

[0002]

2. Description of the Related Art A generally widely used medium disperser forms a blade on a rotating shaft provided in a processing tank, and
The dispersion medium gives motion to the dispersion medium, and the shearing force generated between the medium is used to atomize and disperse the processing material.

However, in the medium dispersing machine as described above,
The action of shearing force also differs depending on the position where the slurry flows,
In order to obtain a uniform particle size, a considerable residence time was required, or the number of passes was increased to allow fluidization in the processing tank.

Further, since the treatment is continuously carried out from the inlet to the outlet of the treatment tank, the particles dispersed in the desired particles are further subjected to the shearing action, resulting in wasteful consumption of energy. In addition, the viscosity of the processing material, the discharge amount, and the like cause the medium to be offset, which causes problems such as heat generation.

Various media dispersing machines have been proposed in which the inside of the processing tank is divided into a plurality of chambers and the processing material is sequentially dispersed in a fine dispersion medium in order to solve such a drawback. However, since the shearing action also differs depending on the flow position of the slurry in each chamber of these medium dispersers, it cannot be said that the above-mentioned problems have been sufficiently solved.

[0006]

The present invention has been made in view of such circumstances.
An object of the present invention is to provide a medium disperser capable of gradually increasing the shearing force from the inlet to the outlet of the treatment tank and imparting a uniform shearing action to the treatment material in each treatment zone to enhance the dispersion efficiency. To do.

[0007]

According to the present invention, the inside of a processing tank is divided into a plurality of processing zones from the inlet side toward the outlet side, and an annular flow path is formed between the inside and the inside wall of the processing tank. A rotating body is provided so as to communicate with each treatment zone, and a dispersion medium in which the particle size is gradually reduced from the inlet side to the outlet side is housed in each treatment zone, and each annular channel of the treatment zone is introduced. There is provided a medium disperser characterized in that the width of the annular flow passage on the outlet side is gradually narrowed compared to the annular flow passage on the side, and the above object is achieved.

[0008]

The inside of the processing tank is divided into, for example, three processing zones, and coarse particles having different particle diameters in order from the inlet side processing zone,
It contains medium and fine dispersion media. Then, as the rotating body rotates, these dispersion media flow in the annular flow path of each processing zone in a substantially uniform state in the circumferential direction, so that the processing material flows in the wide annular flow path in the first processing zone. It is subjected to uniform shearing action regardless of the flow position by the coarse-grained medium and is roughly dispersed.In the next treatment zone, it is medium-dispersed by the medium-grained medium that moves uniformly in the circumferential direction, and finally it moves uniformly in the circumferential direction. Finely dispersed by the fine-grained medium.

As described above, in each treatment zone, the treatment material is coarsely dispersed, mediumly dispersed and finely dispersed irrespective of the flow position, and the coarse particles are dispersed by using a dispersion medium having a large particle size. By using a medium having a small diameter for the fine particles, energy is not wasted and the dispersion efficiency can be improved. Also,
Since the dispersion medium is divided for each treatment zone and the deviation is prevented, the problem of heat generation is solved.

[0010]

EXAMPLES The medium disperser of the present invention can be applied to either a vertical type or a horizontal type. An example in which the present invention is applied to a horizontal type medium disperser will be described below.

FIG. 1 shows an embodiment of a medium disperser according to the present invention. A processing tank (1) has a treatment material inlet (2) at one end and a dispersion treatment material for the treatment material at the other end. It has an outlet (3) and the inside is multiple treatment zones from the inlet side to the outlet side.
It is divided into (4a), (4b), and (4c). In the figure, the treatment tank (1) is divided into three parts, which are connected to each other to form three treatment zones.
It can be divided into more than one room.

A supply port (5) and an extraction port (6) for a dispersion medium (not shown) are formed in each of the treatment zones (4a), (4b), (4c). In each of the treatment zones (4a), (4b), (4c), the dispersion medium accommodated in the treatment zone on the inlet side has a large particle size, and the dispersion medium is formed so that the particle diameter gradually decreases toward the outlet side. Are stored respectively.

In the treatment tank (1), a jacket (7a) is circulated to circulate cooling water or the like to adjust the internal temperature.
(7b) and (7c) are provided for each treatment zone (4a), (4b) and (4c) so that temperature control such as cooling and heating can be performed individually.

In the treatment tank (1), the treatment zone is connected to the inner wall (8) so as to form an annular flow passage (9) of the treatment material from the inlet side to the outlet side. Rotating body
(10) is provided. The annular channel (9) is formed such that the inlet channel (9) is wide and the outlet channel is narrow.

The rotating body (10) is attached to the rotating shaft (11) to rotate, and is formed in a substantially cylindrical shape as shown in FIG. It can also be formed in a polygonal shape. Further, although it is integrally formed through each processing zone, a plurality of rotor elements may be formed according to each processing zone, and these may be sequentially connected in the axial direction.

The outer peripheral surface of the rotating body (10) is preferably provided with a concavo-convex portion (12) for allowing the dispersion medium to flow like a plug flow. In the figure, as shown in FIG. 2, the convex portion (13) and the concave portion (14) having a substantially tooth-shaped cross section are formed parallel to each other along the axial direction. You can For example, the concavo-convex portion is provided to be inclined with respect to the axial direction, a columnar body such as a prismatic shape or a cylindrical shape is provided on the peripheral surface of the rotating body in a protruding manner, or a protruding portion is welded to a raised portion, a dot, or the like. You may form it.

The above-mentioned uneven portion may be provided on both the inner wall (8) of the processing tank (1) and the outer peripheral surface of the rotating body (10), or may be provided only on the inner wall (8). You can
Although it is formed integrally, it may be formed as a separate body and fitted to the rotating body or the like.

In the thus formed annular flow passages (9) of the respective treatment zones, the dispersion media having different particle diameters contained in the respective treatment zones are regulated in the flow passages. The width is set so that That is, in order to allow the dispersion medium to move, at least three times the diameter of the medium is required, and the maximum dimension is such that the rotation of the rotating body (10) does not affect it. , Provided with an appropriate width within this range.

Since the width of the annular channel (9) is gradually narrowed as described above, in the embodiment shown in the figure, the rotating body (10) is used.
The outer diameter of is gradually increased from the inlet side toward the outlet side so that the width of the annular channel of the outlet side treatment zone is narrower than that of the inlet side zone of the treatment zone. However, at this time,
As described above, the rotating body is formed by connecting a plurality of rotating body elements in series.
This makes it very easy to change the width of the annular channel.
You can

The rotating body (10) has a small-diameter portion corresponding to the partition in the processing tank, and the outer surface of the small-diameter portion (15) is connected to the outer peripheral surface through the inclined surface (16). It is continuous. The small diameter part
In (15), it is preferable to form the surface of the dispersing medium in a flat surface so as not to give a large motion to the dispersing medium. Also, the inclined surface (16),
Although it may be a flat surface, an appropriate uneven portion (not shown) may be formed so as to guide the medium to the annular channel (9).

Each of the processing zones (4a), (4b),
A medium separating unit is provided so that the dispersion medium (not shown) housed in (4c) does not move to the adjacent processing zone. The medium separating means can be formed into an appropriate structure. In the embodiment shown in FIG. 1, the periphery of the annular screen plate (17) is fixed to the processing tank (1), and the inner peripheral edge of the rotating body (10) has a small diameter portion (15) so that the medium does not pass through. Is slid on. Each screen
The mesh of the screen plate (17) differs depending on the particle size of the dispersion medium contained in the processing zone, and only the processing material moves through the screen of the screen plate (17). .

In the embodiment shown in FIG. 3, a disc-shaped screen plate (18) is fixed to the small diameter portion (15) of the rotating body (10), and the screen plate (18) is attached to the rotating body. Rotate with. The screen plate
The outer peripheral edge of (18) is in sliding contact with the inner wall (8) of the processing tank (1) or the outer peripheral frame (19) provided on the inner wall to prevent passage of the dispersion medium, and only the processing material rotates. It passes through the screen of the burn-in plate (18). As described above, such a screen plate can be easily provided by configuring the rotating body with a plurality of rotating body elements.

In the embodiment shown in FIG. 4, a fixed plate (20) is provided in the processing tank (1), a rotary plate (21) is provided in the rotating body (10), and the fixed plate (20) and the rotary plate (21) are provided. ) Is a gap type separator in which a narrow gap is formed to prevent passage of the medium, and only the processing material moves through the gap.

In the embodiment shown in FIG. 5, an annular fixing plate (22)
Is fixed to the processing tank (1), and the inner peripheral edge of the fixing plate (22) is opposed to the small diameter portion (15) of the rotating body (10) with a gap through which only the processing material passes. Is.

Although a gap type separator (23) is provided on the outlet side of the treatment tank (1) in the figure, a screen type or other suitable separating means is provided to disperse the dispersion medium. And the treatment material can be separated.

When the processing material is supplied from the inlet (2) by an appropriate supply pump (not shown), the processing material passes through the processing zones (4a), (4b), (4c) one after another. To do. Then, in the annular flow path (9) of each treatment zone, a coarse-medium medium is first formed, then a medium-grain medium and a fine-grain medium, and then a dispersion medium corresponding to the size of the particles to be dispersed gradually. Since the material flows in the narrowed processing space (annular flow path) in a plug-flow manner in a substantially uniform state, the processing material is reliably dispersed while flowing in the circumferential direction.

[0027]

The present invention is constructed as described above .
The processing material supplied into the processing tank is passed through the annular flow path.
When it passes, it is filled in each treatment zone and narrowed by the rotating body
To the shearing force generated between the dispersion media given the flow in the channel
More reliably and strongly distributed, and thus distributed
The processed material that has passed through one treatment zone is transferred to the next treatment zone.
Therefore, it enters into a narrower annular flow path and has a smaller particle size dispersion.
The particles are further made into fine particles by the medium and are targeted in each treatment zone.
Properly disperses, regardless of the flow position
Dispersion is most efficient at each place, a sharp particle size distribution is obtained, and deviation of the medium and heat generation can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of an end portion of a rotating body.

FIG. 3 is a partial cross-sectional view showing a medium separating unit using a rotary screen plate.

FIG. 4 is a partial cross-sectional view showing a medium separating unit using a gap type separator.

FIG. 5 is a partial cross-sectional view showing a medium separating unit using a fixing plate.

[Explanation of symbols]

 1 Processing tanks 4a, 4b, 4c Processing zone 8 Inner wall 9 Annular flow path 10 Rotating body 12 Concavo-convex part 15 Small diameter part

Claims (3)

[Claims] 1. A process in which a treatment material inlet is provided at one end and a dispersion treatment material outlet is provided at the other end, and the inside is divided into a plurality of treatment zones from the inlet side toward the outlet side. A tank, a rotating body provided in communication with each processing zone in the processing tank so as to form an annular flow path of the processing material from the inlet side to the outlet side with the inner wall of the processing tank; In the treatment zone, the dispersion medium with the particle size gradually reduced from the inlet side to the outlet side is housed so as to flow in each annular flow path, and each dispersion medium is prevented from moving to the adjacent treatment zone. The medium separation means provided between the treatment zones is provided, and the dispersion medium flows in the annular flow path.
The outer peripheral surface of the rotating body and / or the inner wall of the processing tank has an uneven portion.
The outer diameter of the rotating body is the width of the annular flow path
The processing zone on the outlet side compared to the above annular flow path on the processing zone on the side
The width of the annular flow path is narrower than that of the treatment zone on the inlet side.
A medium disperser characterized in that the diameter is gradually increased toward the processing zone on the outlet side . 2. The rotating body is placed in a partition within the processing tank.
Is formed to have a small diameter, and the outer surface of the small diameter portion
The medium disperser according to claim 1, which is continuous with the outer peripheral surface . 3. The rotating body is formed according to each processing zone.
The medium disperser according to claim 1 or 2, which is formed by continuously connecting the formed rotating body elements .