JPS6082147A - Continuous media type dispersing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves a dispersion device for producing various dispersions, and forcibly stirs media filled in a dispersion chamber to uniformly disperse various suspensions. The present invention also relates to a continuous media type dispersion device for pulverizing and dispersing materials, and more preferably provides a continuous media type dispersion device suitable for finishing dispersion treatment after preliminary dispersion.

Conventionally, manufacturing processes for various coating agents such as paints, printing inks, colorants, and cosmetics4. +B requires an operation to finely pulverize and uniformly disperse pigments, waxes, and other objects to be crushed in a liquid medium such as phenol, and for this purpose batch type roll mills and ball mills are used.

A dispersion device such as a continuous media mill is used. However, in order to improve the workability of these crushing and dispersing operations, prevent product quality fluctuations, save energy, save space, and have a cost advantage, continuous media type dispersion equipment that uses media is preferable to the batch method. It has been widely used (・ru.

A typical one of these conventional continuous media type dispersing devices has a structure as shown in FIG. Figure 1 shows a schematic cross-sectional view of a vertical device.
) shows the inner wall of the stator, (2) shows the media, (3) shows the rotating shaft for stirring the media, and (4) shows the stirring member attached to the rotating shaft.

Further, (5) indicates a jacket for cooling, etc.

Here, the suspension to be crushed and dispersed is introduced into the material inlet (6
), the media (2) is continuously fed into the dispersion chamber using a pressure supply means such as a pump as necessary, and the media (2) is forcibly stirred by the rotation of the rotating shaft (3) and the stirring member (4). The material to be crushed, such as pigment, is crushed and dispersed by shearing force. Due to the above action of the media, the object to be crushed is finely pulverized and dispersed, and the dispersed suspension that passes through the gaps in the media is separated from the media by the screen (7), which is a media separator, and is discharged. The liquid is continuously discharged from the outlet (8). As the media, a spherical body made of steel, glass, ceramic, or similar material is used, and the particle size and filling meter are determined depending on the purpose of pulverization and dispersion.

The pulverization or dispersion ability of this media-type dispersion device is as follows:
Depending on how effectively the media applies abrasion stress to the suspension, not only its processing capacity but also the quality of the dispersion are greatly influenced, and the direction of media agitation efficiency is a major issue. Met.

For this reason, for example, the shape of the stirring member may be changed from a pin shape to a disk shape, a hole may be provided in the disk to deform it into a ring shape or a cam shape to control the flow of the media, or a bottle may be provided on the inner wall of the stator to separate the media. Improvements have been made, such as increasing the speed difference in collision resistance between rotors and increasing the circumferential speed on the shaft side of the rotor by making the rotating shaft thicker.

However, although these conventional improvement means are effective to some extent in improving the media stirring efficiency, they may result in accelerated wear of the stirring member or the media, or the rotation shaft of the stirring member 9 or There is a large difference in the stirring efficiency of the media in each part of the dispersion chamber, and depending on the passing position of the object to be crushed, it may receive insufficient crushing and dispersion action, resulting in a short-pass phenomenon in which coarse particles pass through with their force intact. or the mechanical surface.

There were problems in terms of quality, work, and energy efficiency.

Therefore, it has been necessary to significantly shorten the life of the dispersing device and to frequently replace the stirring member. In addition, the short pass phenomenon of unpulverized coarse particles causes variations in the particle size of the particles to be crushed in the dispersion, making it difficult to obtain an ideal dispersion with a uniform and sharp particle size distribution.

As with paints and printing inks, the degree of dispersion determines the quality of the product.
The presence of coarse particles (9) broadening the particle size distribution of the dispersion poses a major problem, although it directly affects the performance (σ). As a result of this research, we were able to develop an excellent continuous media type separation device that solved these problems.

That is, the present invention includes a cylindrical dispersion chamber surrounded by an inner wall of a stator, an outer wall of a rotor, and a media separator, and a suspension is continuously pulverized and dispersed by forcibly stirring the media filled in this dispersion chamber. a rotatably mounted rotor having a rotor stirring member projecting radially toward the dispersion chamber, and a stator having a stirring member fixed on an inner stator wall projecting toward the dispersion chamber; In the continuous media type dispersion device, the rotor stirring member is positioned between the upper and lower sides of adjacent stirring portion phases fixed to the inner wall of the stator, and the stator stirring member is attached at contact point A or point B (third point The intersection point of the horizontal line passing through the figure) and the rotation axis of the rotor, or point E and A,
The rotor stirring part is placed at the position of the triangle CDE connecting the midpoint C of point B, and the distance between the tip of the rotor stirring member and the inner wall of the stator is the distance between the tip of the rotor stirring member and the stator stirring member. (The vertical distances up to one member are equal to PN and QO, and the distances Jli' and KG between the tip of the stator stirring member and the outer wall of the rotor are set as the distance "D" and "D" separated by the triangles BEC and ADC and the outer wall of the rotor. It is a continuous media type dispersion device with σ equal to σ.

The continuous media type dispersion device of the present invention, which is designed to keep the sliding speed of each part of the dispersion chamber close to a constant, operates to finely pulverize and uniformly disperse materials to be crushed, such as pigments and wax, in a liquid medium such as a festival. Although it can be widely used for the preparation of a dispersion containing particles of up to 571 microns after preliminary dispersion, for example, the working surface 1.
It is particularly suitable in terms of mechanical aspects, energy efficiency, etc.

Below, the continuous media type dispersion device according to the present invention will be explained in more detail with reference to the drawings.

FIG. 2 shows a vertical cross-sectional view of a specific example of the dispersion device according to the present invention, which constitutes a dispersion chamber 13 surrounded by a stator inner wall 11, a rotor outer wall 12, and a media separator 21.

The dispersion chamber 13 is filled with media 14, and the stator inner wall 11
A stator stirring member 16 is attached to the rotor, and a rotor stirring member 15 is attached to the rotor outer wall 12. A medium passage j9 for cooling or heating is formed outside the stator, and a medium passage 2o for cooling or heating is provided inside the rotor as required. The treated suspension is supplied from the inlet J7 by a pressure supply means, etc., pulverized and dispersed in the dispersion chamber, separated from the media by, for example, a media separator 21, and the treated dispersed suspension is discharged from the discharge [18]. The agitation member should be installed in a position that approaches the state.

Specify the thickness, length, shape, etc.

FIG. 3 is an enlarged view of a part of the apparatus shown in FIG. 2, and shows the relative relationship between the stator stirring member 16 and the rotor stirring member 15. 22 is the central axis of the rotor 12. The stirring section 16 fixed to the stator inner wall 11 has a cylindrical cross section. The lower contact point A between the stator stirring member 16-1 and the stator inner wall, and the lower contact point A between the stator stirring member 16-2 and the stator inner wall.
Let the two-part contact point B be the intersection of the horizontal line passing through A, s, and 9 and the central axis 22 of the rotor, and let it be E, and the A, B points σ
) When C is the midpoint, triangle AI) C and B E C
is formed. During crushing and dispersion operations, the stator inner wall I
The rotor J2 and the rotor stirring member 16 are fixed, and the rotor J2 and the rotor stirring member 15 rotate about the central axis 22 to forcibly stir the media in the dispersion chamber.

The angular velocity of the rotor is ω, and the rotor stirring part 11 is
If the length -E'N to the lower point P of the tip of s-2 is 1t2, the circumferential speed V at the lower point P of the tip of the rotor stirring member is ω
- Indicated by R2. Here, if the angles ADC and BEC of the triangle ADC and BEC are θ, then the rotor stirring member 15
-2, the vertical distance PN or QO between the lower point P or upper point Q of the tip and the corresponding stator stirring member is R2tanθ
The tip P or Q of the rotor stirring member J5-2 is represented by
and N or 0 of the stator stirring member vertically corresponding to these.
The respective sliding speeds el in between are expressed as follows.

el = ω・R2/pn=ω'R2/QO=ω・R/R
2・tanθ=ω/tarlθ Here, the sliding speed e2 between the tip center point M of the rotor stirring member J5-2 and the horizontally corresponding stator inner wall point C is, e2=(cJ・R2/ MCte is expressed, MC=
If PN-QO, e2 = 0)・R2/M(Go-ω' R2/ PN
= ω−R2/QO2ω・R, / R2tanθ=ω/
tanθ.

Assuming that the diameter from the rotor center 1111122 to the rotor outer wall point F or G point is one phrase, the circumferential speed at the rotor outer wall is expressed as (L) - Rn. Here, point F or 4:l on the outer wall of the rotor: point G and the tip of the stator stirring member at 5 points or 1 (distance V core or GK to point 100 or G
If it is equal to I, then e3-ω・R between point F or G on the outer wall of the rotor and five points or points on the tip of the stator It striking member.
,,/FJ(=FH)-ω-Ro/GK (-GI)
= ω・Ro/Rotanθ=ω/tanθ, that is, the slipping velocity e1 between PN and QO, the slipping velocity e2 between the two, and the slipping velocity e3 between EJ and the plane are the same, and ω/tanθ will show a constant value.

As a result, almost uniform forced stirring of the media is performed.

As mentioned above, the position and size of the agitation members fixed to the inner wall of the stator and the outer wall of the rotor, respectively, depend on the location and size.

By specifying the length, it is possible to uniformly stir the media, and it is possible to prevent a short path phenomenon or a blockage phenomenon due to concentration of the media.

The configuration of FIG. 3 can be summarized as follows.

The thickness of the stirring members of the stator 9 rotors is both d, and the angle D
The angle θ of EC and ADC is set to 0 and θ<200, and the following formula (
1), (2), (3. By determining the beam θ and R3, the thickness of the stirring member is d, and the length is R2-pulling).

(R3-R,) is specified.

Ro 1R,, ta11θ=R, (]) f% + 'l
't2 tanθ=R3(2)d=2X (R3
-R2) tan θ (3) FIG. 4 has the same purpose as FIG. 3, but shows more preferable specific examples of the size, shape, etc. of the stirring part. The shape of rotor stirring member] 5 is shown in a truncated conical cross-sectional view corresponding to hypotenuses CE and CD of triangles BEC and ADC. If the distance MC is made equal to I) N, and the distance FJ from the tip of the stator stirring member to the outer wall of the rotor is made equal to HF, the above conditions are satisfied, and the shear rate is is independent of the length from the rotor rotating shaft 22 (denoted as θ/tanθ.Furthermore, if the rotor stirring member is shaped like a truncated cone touching the hypotenuse of the triangle mentioned above, for example, the tip of the stator stirring member The sliding speed between the upper point J and the vertically corresponding point of the rotor stirring member is ω' ”+ / LJ = ω-R1/R
, tanθ-ω/lanθ (where EJ = R). Therefore, it can be seen that the sliding speed between the side surface LP of the rotor stirring member and the corresponding side surface JN of the stator stirring member is expressed as ω/lanθ and is constant regardless of the position.

An example in which a wave-shaped raised body 23 is formed is shown.

By forming the wavy ridges, the distance between the tip of the rotor stirring member and the wavy ridges is substantially constant;
The sliding speed between these is also ω/tanθ.

Therefore, even more uniform stirring of the media is possible.

The configuration of FIG. 4 can be summarized as follows.

Angle BEC, ADC17) The angle is O< 0 'r 20
By determining θ and R3 from the following formula (11, (21, (31, (41), means thickness), length R2-RO), (R3
−4,) is specified. This is to make the surface areas of the rotor stirring member (conical bottle or trapezoidal disk) and the stator stirring member approximately equal.

Ro +J, t tanθ-R, (1114+ R2t
anθ= R3 (2) d = 2 X (R3-R,) tanθ (3) d
= 4
is different, and is twice as thick as in Figure 3.

As long as the cross section of the stirring member of the stator and rotor satisfies the above conditions, the shape is a cylindrical bottle or a conical pin.

Alternatively, it may be a disk type having a cross section thereof, or a partially cut disk type.

The tip side can be rounded, flat, or have a variety of shapes. FIG. 5 is a cross-sectional view taken along line A-A in FIG. An example of the format is shown below.

Although FIG. 2 shows an example of the rotor 12, the manner in which the rotor is attached can be freely modified as necessary.

Furthermore, by passing a refrigerant or the like through the rotor, more efficient heat exchange is possible.

The dispersing device of the present invention having the above-described configuration can be used for pulverizing and dispersing suspensions made of various materials, and can be partially enjoyed, and the following effects can be expected.

1. Since the sliding speed in the dispersion chamber is substantially constant, the uniformity of the media distribution is maintained and smooth operation is possible.

2. Short bath of the dispersed material can be prevented and a dispersion with a sharp particle size distribution can be obtained.

6. Blockage due to collection of media is less likely to occur.

4. Localized wear and deformation of stator inner wall 9 rotor outer wall, each stirring member, and media is small.

[Brief explanation of drawings]

FIG. 1 shows a schematic longitudinal sectional view of a conventional continuous media type dispersion device. FIG. 2 shows a longitudinal sectional view of a specific example of the continuous media type dispersion device according to the present invention. FIG. 3 is an enlarged view of a part of the apparatus shown in FIG. 2, showing the relative relationship between the stator stirring member and the rotor stirring member of the apparatus. FIG. 4 shows a more preferred embodiment for the same purpose as FIG. FIG. 5 shows a cross-sectional view taken along line A-A in FIG. 2. Reference numerals in the figure 1.11...Stator inner wall 2.14...Media 16...Stator stirring member 7.21...Media separator 12...Rotor outer wall 6,17...
・Material population 15... Rotor stirring member 8.18
... Discharge port 22 ... Rotation shaft 23 ...
- Waveform raised body 13... Dispersion chamber Patent applicant Han Co., Ltd. 1) Chamber of Commerce (3 others) L/ Figure L4 Figure ¥-5 Procedural amendment January tq, 1985 Commissioner of the Japan Patent Office Manabu Shiga 2. Name of the invention Continuous media type amnesty device 6. Relationship with the case of the person making the amendment Patent applicant's address name Sakata Shokai Co., Ltd. 4. Agent 5. ] and [Detailed Description of the Invention] column Figures 3 and 4 of the drawings (attached sheet) (1) The description in [Claims] is corrected as follows. 1. A cylindrical dispersion chamber surrounded by the inner wall of the stator, the outer wall of the rotor, and a media separator, which forcibly stirs the media filled in this dispersion chamber to continuously crush and disperse the suspension. , a rotatably supported rotor with a rotor agitation member 4:1' projecting radially towards the dispersion chamber, and an agitation member fixed to the inner stator wall projecting towards the dispersion chamber. In a continuous media type dispersion device consisting of a stator, the rotor stirring member is positioned between adjacent stirring members fixed to the inner wall of the stator, and the stator stirring member is attached at contact point A or B. The triangle CDE connecting the intersection point of the horizontal line passing through (Fig. 3) and the rotation axis of the rotor, or the midpoint C between points E and points A and B corresponds to the triangle CIH formed by dividing the outer wall of the rotor. Place the rotor stirring member at the position, and set the distance MC between the tip of the rotor stirring member and the inner wall of the stator to 4゛1.
The vertical distance to one member is equal to PN and QO, and the distance between the tip of the stator stirring member and the outer wall of the rotor is JF and KG.
A continuous media type dispersion device characterized in that the triangles BFC and ADO are equal to the distances HF' and G that are separated by the outer wall of the rotor. 2. The rotor stirring member has a trapezoidal cross section QP within the triangle CDE.
HI (FIG. 4) A continuous media type dispersion device according to claim 1. 3゜ Between the stator stirring members, there is a corrugated raised body (the length from the tip of the rotor stirring member to the inner wall of the stator, whose radius is MC).
4. The continuous media type dispersion device according to claim 1 or 2, characterized in that it is provided with: (FIG. 4, 23). 4. Thick diameter of both stator and rotor stirrer 11' members) d
The continuous media type dispersion device according to claim 1, wherein l satisfies the following formula % formula % (3). 5. A patent in which the thickness (diameter) a2 of the rotor stirring member at the vertically related position of the tip of the stator stirring member is equal to the diameter (thickness) of the stator stirring member and satisfies the following formula % formula % (4) A continuous media type dispersion device according to claim 2 or 3'JA. (2) The statement on page 8, line 5 of the specification is corrected as follows. [The rotor stirring member is placed at a position corresponding to the triangle CIH formed by dividing the triangle CDB by the rotor outer wall,
(3) The statement on page 8, lines 13-14 of Specification 1 is corrected as follows. "The continuous media type dispersion device P□'+1 of the present invention is"
(4) The statement from page 14, line 12 of the statement box to page 15, line 6 has been corrected as follows. The configuration of both stirring members in Fig. 4 can be summarized as follows. d2, the angles of angles BEC and ADC are 0 and θ≦20°
and length R3-Rz) and length R2-R1)
are equal, then from the following equations (1), (2), and (3), θ
By determining and R3, the thickness d2 of the stirring member (for the rotor stirring member, means the thickness at the position corresponding to the tip of the stator stirring member), the length R2-RO), (R3
-R1), the rotor outer wall radius R8 can be specified. Ro+Rotanθ=Rt (1) R2+R2tanθ−Ra t2) d2=2X (R3−R1) tanθ (3)=
4 X (R3-R2) tanθ As a result, the surface areas of the rotor stirring member and the stator stirring member become approximately equal, allowing for more uniform mixing of the media. (5) The description for the details will be corrected as follows. Page Line Original entry Correction entry 7 Lower 4 has 8 1o ADC and ADC is 10 4 cylindrical rectangular 12 lower 1 Φ'l. It is possible to do y. 13 3 cL= d, = 16 11 Deformation Deformation or destruction (6) Correct Figures 3 and 4 respectively as shown in the attached figure. Figure 3 Ro RI R2R3 Figure 4

Claims (1)

[Claims] 1. A cylindrical dispersion chamber surrounded by an inner wall of the stator, an outer wall of the rotor, and a media separator, in which the media filled in this dispersion chamber is forcibly stirred to continuously form a turbid liquid. A rotatably supported rotor with a rotor agitator protruding in a transverse direction toward the dispersion chamber for comminution and dispersion, and a stator inner wall protruding toward the dispersion chamber. In a continuous media type dispersion device consisting of a stator with a stirring member fixed to the inner wall of the stator, the rotor stirring member is positioned on the upper and lower sides of the stirring member fixed to the inner wall of the stator. Child stirring sound [4A is installed at contact point A or B (Fig. 3)
The intersection point of the horizontal line passing through and the rotation axis of the rotor is the triangle 1uCI connecting point E and the midpoint C of points A and B). The distance between the tip and the inner wall of the stator ■ is equal to the vertical distance PN and H between the tip of the rotor stirring member and the stator stirring member ↑, and the force
The distances JF and i between the tip of the stator stirring member and the outer wall of the rotor are triangles BEC and ADC7! 1'' - A continuous media type dispersion device characterized in that the intervals separated by the rotor outer wall are equal to H, F and IG. 2. Rotor stirring member center, σ in triangular CDB] Trapezoidal cross section Q
PHI (FIG. 4) Continuous media type dispersion device according to claim 1. 6. A corrugated raised body (Fig. 4, 23) is installed between the stator stirring members, with the radius being -, which is the length from the tip of the rotor stirring member σ) to the inner wall of the stator. The C continuous media type dispersion device according to claim 1, which satisfies the following formula % (3) with the radius R39 of the rotor stirring member and the tip radius R2 of the rotor stirring member. 5. A patent claim that satisfies the following formula % formula % (4) using the child inner wall radius R3 at the vertically related position of the tip 4 of the stator stirring member, the tip radius of the rotor stirring member, and the stator stirring member tip radius R1 A continuous media type dispersion device according to item 2 or 3.