JP2003117371A - Medium circulation type mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the sticking of a treated material on the inside surface of a rotor in a medium circulation type mill. SOLUTION: A rotor (23) is inserted into an annular treatment gap (20) formed of an outer circumferential stator (18) and an inner circumferential stator (19), and the treatment gap (20) is divided into an outside gap (21) and an inside gap (22). A medium separator (27) for separating a dispersion medium from the treated material is provided in the inner circumferential stator (19). A circulation port (26) for circulating the dispersion medium from the inside gap (22) to the outside gap (21) is provided in the rotor (23). A projecting chip (28) adjacent to the inside surface of the rotor 23 and extending in the axial direction is provided on the outside surface of the inner circumferential stator (19). The inside surface of the rotor (23) may be formed to have a hexagonal shaped cross-section instead of providing the projecting chip (28) on the inner circumferential stator. The circulating port (26) is opened to be inclined backward to the rotational direction of the rotor (23).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipeline bead mill in which a treatment material such as a solid-liquid slurry solution in which solid particles are suspended in a liquid is pre-dispersed during transfer in a liquid feed line. The present invention relates to a medium circulation type mill, such as an immersion type dispersing machine, in which a dispersion medium is circulated so that a dispersion treatment can be carried out in a batch system.

[0002]

2. Description of the Related Art When a treatment material such as a solid-liquid slurry solution is subjected to dispersion treatment by a disperser such as a wet medium disperser, a pretreatment (pretreatment) in which the treatment material is agitated before supplying the treatment material to the disperser. Mixing is performed, but it is known that solidification (powder) cannot be converted into primary particles only by this pretreatment, and many secondary aggregates are precipitated in the pipeline. Therefore, the applicant of the present invention has previously made it possible to preliminarily disperse the secondary aggregate by disentangling the secondary agglomerates while the treatment material passes through the liquid feed line when the treatment material such as a solid-liquid slurry solution is subjected to dispersion treatment. A pipeline bead mill having the above structure was proposed.

A dispersion chamber having a material supply port connected to a pipe for supplying a processing material on one side and a material discharge port connected to the other end of the liquid supply pipe on the other side is formed to disperse the dispersion chamber. The chamber is provided with a cylindrical outer peripheral starter opening toward the material supply port side and an inner peripheral starter located inside the outer peripheral starter and opening toward the material discharge port side. A drive shaft for forming a processing gap between the rotors, inserting a cylindrical rotor into the processing gap so as to divide the processing gap into an outer gap and an inner gap, and rotating the rotor. And a dispersion medium is accommodated in the processing gap, and the rotation of the rotor causes the dispersion medium to flow through the outer gap to the inner gap and circulate to the rotor so as to flow back to the outer gap. Forming an outlet, and forming an outlet in the inner peripheral stator for flowing the processing material to the discharge outlet, Subscription to separate the dispersion medium from the process material - pipeline bi provided down - Zumiru.

In the pipeline bead mill, the processing material supplied to the processing gap formed by the outer peripheral stator and the inner peripheral stator is mixed with the dispersion medium (bead) in the processing gap. The outer surface of the rotor is rotated by the rotation of the rotor, and the outer surface of the rotor is rotated by the outer surface of the rotor. Enter the inner gap formed between the side faces, and rotate by the action of centrifugal force.
It returns to the outer gap through the circulation port formed in the above, and while being circulated and flowing through the outer gap and the inner gap, it is atomized by the dispersion medium.

According to the above pipeline bead mill, it has been confirmed that it is effective for crushing the secondary agglomerates of the pretreated treatment material, and in the case of simple atomization, the above pipe is repeatedly used. It was also found that the desired dispersion result was obtained by passing through a line bead mill. Further, in the structure similar to that of the dispersion chamber of the pipeline bead mill, the dispersion processing is performed in a batch system.
It is also used in the immersion type disperser described in JP-A No. 01-38184, and it is possible to efficiently perform dispersion treatment even in a batch system.

The medium circulation type mill such as the pipeline bead mill and the immersion type dispersing machine can efficiently perform the dispersion treatment as described above. However, depending on the type and properties of the treated material, the inner gap The treated material that has entered the rotor adheres to the inner surface of the rotor, and further the dispersion medium (beam
There is a problem in that the processing capacity is deteriorated due to the inclusion of dust) and that it cannot be easily removed during cleaning.

[0007]

The problems to be solved by the present invention are as follows.
It is an object of the present invention to provide a medium circulation type mill in which the treatment material is prevented from adhering to the inner surface of the rotor in the medium circulation type mill as described above and the problems such as the above cleaning are not caused.

[0008]

According to the present invention, in order to prevent the processing material from adhering to the inner surface of the rotor as described above, the processing material flowing along the inner surface of the rotor. Of the treatment material flowing along the inner surface of the rotor is repeatedly compressed and released to make the flow turbulent and prevent the treatment material from adhering to the inner surface of the rotor. A medium circulation type mill is provided.

That is, according to the present invention, a cylindrical outer peripheral starter and a cylindrical inner peripheral starter located inside thereof are provided in a dispersion chamber having a processing material supply port and a discharge port. To form an annular processing gap into which the processing material flows, and a rotatable rotor is inserted into the processing gap to divide the processing gap into an outer gap and an inner gap, and the rotor is rotated. Thus, a circulating port is formed in the rotor so that the treatment material flows in the treatment gap together with the dispersion medium through the outer gap to the inner gap and returns to the outer gap. In a medium circulation type mill provided with a medium separation device for separating the dispersion medium and discharging only the processing material to a discharge port, the outer surface of the inner peripheral stator is close to the inner surface of the rotor. And a projecting piece extending along the axial direction of the rotor is provided. The above-mentioned problem is solved by providing a medium circulation type mill that can change the flow of the processing material flowing along the inner surface of the rotor by the protruding piece and prevent the processing material from adhering to the inner surface. To be done.

Further, according to the present invention, a cylindrical outer peripheral stator and a cylindrical inner peripheral stator located inside thereof are provided in the dispersion chamber having the supply port and the discharge port for the processing material. An annular processing gap is provided through which processing material flows, and a rotatable rotor is inserted into the processing gap to divide the processing gap into an outer gap and an inner gap. A rotation port is formed in the rotor so that the treatment material flows in the treatment gap together with the dispersion medium through the outer gap to the inner gap by the rotation so as to flow back to the outer gap. In a medium circulation type mill having a medium separation device for separating the dispersion medium and discharging only the processing material to a discharge port, the inner surface of the rotor has a polygonal cross section such as a quadrangle or a hexagon. , Oval, substantially elliptical, eccentric circle, and other irregular cross-sectional shapes A medium circulation type mill as a characteristic is provided, and when the rotor is rotated, the treatment material is compressed or released because the inner surface is formed to have an irregular cross-sectional shape. It will not stick to the side,
The above problems can be solved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is applied to a pipeline bead mill provided in the middle of a liquid feeding line as described above, or a medium circulation type mill such as an immersion type disperser capable of performing a batch type dispersion treatment. In the embodiment shown in the figure, the dispersion chamber (1) is provided in the middle of the pipe (L) for feeding the processing material such as the solid-liquid slurry solution so that the secondary aggregates are crushed. The example applied to the pipeline bead mill which was made into is shown.

Main body (2) forming the dispersion chamber (1)
Has a material supply port (3) connected to the upstream pipe (L) on one side and a material discharge port (4) connected to the downstream pipe (L) on the other end. It The body (2) is
Inlet side member (5), intermediate member (6) and discharge side member (7)
Are connected by bolts (8) ...
The inlet side member (5) is provided with the material supply port (3), the inflow chamber (9) and the inlet port (11) for the glass beads, the ceramic beads and other dispersion media (beads) (10). A drive shaft (14) formed and driven by a motor (not shown) extends through the shaft seal portion (12) and the cover plate (13) into the main body.

Axial flow blades are provided on the drive shaft (14) so that the flow of the processing material in the inflow chamber (9) causes an axial flow toward the material discharge port side through the intermediate member (6). (15) is provided. As the axial flow blade (15), it is preferable to use a scraping blade that has the effect of scraping the processing material that has entered the inflow chamber toward the intermediate member (6) as shown in the figure, but an axial flow propeller or the like is used. It can also be used.

The intermediate member (6) has an inward projecting edge (17) for forming an inflow port (16) projecting inward toward the center and sloping downward in an inverted conical shape, and an outer peripheral stator. -(18) is provided, and the discharge side member (7) has an inner peripheral stage having an outlet (not shown) communicating with the material discharge port (4).
There is a switch (19). The outer peripheral stator (18) and the inner peripheral stator (19) are each formed in a tubular shape, and the material discharge port is provided inside the outer peripheral stator (18) that opens toward the material supply port. An inner peripheral stator (19) opening to the side is provided, and an annular bottomed processing gap (20) is formed between the two stators. The dispersion medium (10) ... Is housed in the processing gap (20).

In the processing gap (20), the inside of the processing gap is divided into an outside gap (21) and an inside gap (22), and the outside gap (2
A cylindrical rotor (23) is inserted from the opening side of the processing gap so as to connect the (1) and the inner gap (22). The rotor (23)
Is a substantially frustoconical rotor end face portion (24) attached to the lower end of the drive shaft (14) and a cylindrical rotor connected to the rotor end face portion (24). It has a body (25) and is rotated within the processing gap (20) by the drive shaft. The processing gap (2
The width of (0), particularly the width of the outer gap (21), is formed to the same extent as that of an ordinary annular-type medium disperser, and is set to a width that allows the shearing force of the dispersing medium to efficiently act on the processing material. .

When the rotor (23) rotates, the treatment material and the dispersion medium (10) flow in the treatment gap (20) by the rotor, and at this time, the outer gap ( A circulation port (26) is formed in the rotor (23) so that the dispersion medium flowing through the inner gap (22) through the inner space (21) flows back from the inner gap (22) to the outer space (21). ing.

At the outlet of the inner peripheral stator (19), there are small holes for separating the dispersion medium (10) from the processing material.
A medium separation device (27) having a flow hole such as a slit or a mesh is formed. In the figure, for the sake of explanation, a screen formed of a net in a cylindrical shape is shown, but a screen may be attached to the outlet or formed in any other suitable medium separation structure. . Further, a lower end of the inner surface of the rotor end surface of the rotor and an inner peripheral stator having an outlet at the upper end are combined to form a gap between both members to the extent that the passage of the dispersion medium is blocked. Alternatively, a so-called gap separator may be configured (not shown).

About 60 to 90% of the dispersion medium (10) is filled in the processing gap (20), and is passed from the upstream pipe (L) through the material supply port (3) into the dispersion chamber. The sent processing material is transferred from the inflow port (16) of the dispersion chamber (1) to the processing gap.
It enters the outer gap (21) of (20) and flows into the inner gap (22).
During this period, the dispersion medium (10), which has been given a motion by the rotor (23), loosens the secondary agglomerates in the treated material and solid particles by the impact force and the grinding force generated between the dispersion medium. The processing material is atomized and pre-dispersed, and only the pre-dispersed processing material flows from the material discharge port (4) to the downstream pipe (L) through the medium separation device (27) such as a screen. . A temperature may be controlled by providing a jacket around the dispersion chamber or at an appropriate portion such as a rotor.

In the case of the immersion type disperser, the inlet side member (5) is removed, the dispersion chamber is immersed in the processing material stored in the tank, and the processing material is treated with the inlet (16) as the supply port. After being subjected to the above treatment by directly flowing into the dispersion chamber, the treatment material that has flowed out into the tank is circulated again from the inflow port into the dispersion chamber and the above treatment is repeated to perform a desired dispersion treatment. Good.

Then, as shown in FIG.
(23) is provided concentrically with the inner peripheral stator (19), and the inner surface has a circular cross-sectional shape.
The outer surface of the rotor (19) is adjacent to the inner surface of the rotor (23) and extends along the central axis of the rotor (23).
Is projected. As shown in FIGS. 2 (A) and 2 (B), the projecting piece (28) has a polygonal shape such as a triangular shape or a quadrangular shape, or as shown in FIG. 2 (C), the surface has a circular shape or an elliptical shape. It is made in the shape of a rod formed on the curved surface of and is attached to the support plate (29). In the case of a polygonal shape, the corner portion (30) is made to face the flow so that the processing material flows obliquely with respect to the inner surface of the rotor (FIG. 2 (A)). (B)
The flat surface (31) may be opposed to the flow so as to generate a turbulent flow, as shown in FIG. 2, or an auxiliary member (32) may be provided on the back side as shown in FIG. 2 (D).

The length of the projection piece (28) is set to an appropriate length within the axial length of the inner surface of the rotor (23), and the projection piece (28) and the rotor (23). It is preferable that the gap between the inner surfaces of the above is at least about 4 times the particle diameter (bead diameter) of the dispersion medium used so as not to hinder the rotation of the rotor.

With the above structure, when the rotor (23) rotates, the processing material flowing along the inner surface of the rotor is
The flow changes due to resistance at the protruding piece (28),
The adhesion to the inner surface of the target is prevented.

FIG. 3 shows another embodiment, which is basically the same as the embodiment shown in FIG. 1 except that the inner surface of the rotor (23) has a different sectional shape. . That is, the inner side surface of the rotor and the outer side surface of the inner peripheral stator (19) allow the processing material to be compressed and released when the rotor rotates. The inner side surfaces are formed to have a modified cross-sectional shape in which the interval changes in the circumferential direction. As for the modified cross-sectional shape, for example, as shown in FIGS. 4 (A) and 4 (B), a square (33), a hexagon (3
4) or the like, or an ellipse (35) or an ellipse as shown in FIG. 4 (C), or the circular center of the inner surface of the rotor as shown in FIG. 4 (D). It can be an eccentric circle (36) displaced from the center of the counter (19).

With the above construction, when the rotor (23) is rotated, the outer surface of the inner peripheral stator (19) and the rotor (23) are rotated.
The treatment material is released in the portion (37) where the distance between the inner surfaces of the blades is wide and compressed in the narrow portion (38), and the treatment material is rotated (23) by repeating this release and compression. )
It can be prevented from adhering to the inner surface of the. In addition,
You may make it use together the protrusion as shown in the said Example.

According to the experiment, when the inner surface of the rotor (23) is formed in a hexagonal cross-section, the diameter of the medium separating device such as a screen provided on the inner peripheral stator (19) is changed. It was possible to increase the flow rate, to increase the discharge flow rate, to increase the number of times of compression and release, and to reliably prevent the treatment material from adhering to the inner surface of the rotor.

A circulation port (26) formed in the rotor (23)
May be radially opened along the axial direction of the rotor (23) as shown in FIG. 4, but as shown in FIG. 2 (A) and FIG. When the circulation port (26a) is provided with an opening inclined rearward with respect to the rotation direction of the arrow (39), the treatment material and the dispersion medium flow smoothly, and a preferable result is obtained. In particular, as shown in FIG. 5, when the inner surface of the rotor (23) is formed in a polygonal shape in cross section, the circulation is inclined backward toward the extension line (tangential direction) of the side of the polygon. A mouth (26b) should be provided. By doing so, the treatment material or dispersion medium flows out to the outer surface side (outer gap) of the rotor with a small resistance in the tangential direction along the inner surface of the rotor when the compression is released. By repeating such flow, the adhesion of the processing material to the inner surface of the rotor is further prevented.

[0027]

The present invention is constructed as described above, and an annular processing gap is formed between the outer peripheral stator and the inner peripheral stator, and the rotor is inserted into the processing gap. In the medium circulation type mill, the treatment gap is divided into an outer gap and an inner gap, and the treatment material and the dispersion medium are circulated through the outer gap and the inner gap by the rotation of the rotor to perform the dispersion treatment. Since a projecting piece is provided on the outer surface of the stator so as to be close to the inner surface of the rotor and extends along the axial direction of the rotor, the projecting piece extends along the inner surface of the rotor. The flow of the flowing processing material can be changed so that the processing material does not adhere to the inner surface of the rotor.

Further, in the medium circulation type mill as described above, the cross-sectional shape of the inner side surface of the rotor is formed into a polygonal shape such as a quadrangle, a hexagon, an ellipse, a substantially ellipse, an eccentric circle or other irregular cross-sectional shape. Therefore, when the rotor is rotated, the distance between the outer surface of the inner peripheral stator and the inner surface of the rotor changes widely in the circumferential direction, and the treatment material is compressed in the narrow portion, and the wide portion is compressed. It is possible to change the flow of the processing material by repeating compression and release by preventing the adhesion of the processing material to the inner surface of the rotor.

As described above, according to the present invention, the treatment material can be prevented from adhering to the inner surface of the rotor, the dispersion efficiency can be improved, and the cleaning operation can be easily performed.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of the inner circumference stator viewed from a plane,
(A) is an explanatory view including a rotor, and (B) to (D) are explanatory views showing another embodiment.

FIG. 3 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 4 is an explanatory view showing a cross-sectional shape of the inner surface of the rotor, (A) shows a quadrangle, (B) shows a hexagon, (C) shows an ellipse, and (D) shows an eccentric circle. Each explanatory view.

FIG. 5 is an explanatory view of another embodiment in which the inner surface of the rotor has a hexagonal cross section.

[Explanation of symbols]

1 Dispersion chamber 2 Main body 18 Peripheral stator 19
Inner circumference stator 20 Processing gap 21 Outside gap 22 Inside gap 23
Rotor 26 Circulation port 28 Projection piece 33 Square 34 Hexagon
35 Ellipse 36 Eccentric circle

Claims (10)

[Claims] 1. A processing material flows into a dispersion chamber having a supply port and a discharge port for the processing material by providing a cylindrical outer peripheral stator and a cylindrical inner peripheral stator located inside thereof. An annular processing gap is formed, and a rotor that is rotatable so as to divide the inside of the processing gap into an outer gap and an inner gap is inserted into the processing gap,
A rotation port is formed in the rotor so that the treatment material flows in the treatment gap with the dispersion medium through the outer gap to the inner gap by the rotation of the rotor to flow back to the outer gap. In a medium circulation type mill provided with a medium separating device for separating the dispersion medium into the inner peripheral stator and discharging only the processing material to a discharge port, the roller is attached to the outer surface of the inner peripheral stator. A medium circulation type mill characterized in that a projecting piece is provided proximate to the inner surface of the rotor and extending along the axial direction of the rotor. 2. The medium circulation type mill according to claim 1, wherein the gap between the tip of the projecting piece and the inner surface of the rotor is 4 times or more the grain size of the dispersion medium. 3. The medium circulation type mill according to claim 1, wherein a cross-sectional shape of the projecting piece is a polygonal shape such as a triangle or a quadrangle. 4. The medium circulation type mill according to claim 1, wherein the surface of the projecting piece is formed into a curved surface such as a circle or an ellipse. 5. The medium circulation type mill according to claim 1, wherein the circulation port is opened so as to be inclined rearward with respect to the rotation direction of the rotor. 6. A processing material flows into a dispersion chamber having a supply port and a discharge port for the processing material by providing a cylindrical outer peripheral stator and a cylindrical inner peripheral stator located inside thereof. An annular processing gap is formed, and a rotor that is rotatable so as to divide the inside of the processing gap into an outer gap and an inner gap is inserted into the processing gap,
A rotation port is formed in the rotor so that the treatment material flows in the treatment gap with the dispersion medium through the outer gap to the inner gap by the rotation of the rotor to flow back to the outer gap. In a medium circulation type mill provided with a medium separation device for separating the dispersion medium into an inner peripheral stator and discharging only a processing material to a discharge port, the inner surface of the rotor has a quadrangular cross-sectional shape. Polygon such as hexagon, oval, approximately ellipse,
A medium circulation type mill characterized by being formed into an eccentric circle or other irregular cross-sectional shape. 7. The medium circulation type mill according to claim 6, wherein the inner surface of the rotor has a polygonal cross-section, and the circulation port is provided at a corner of the polygon. 8. The medium circulation type mill according to claim 6, wherein the circulation port is opened so as to be inclined rearward with respect to the rotation direction of the rotor. 9. The circulation port is provided on an extension line of a polygonal side of the inner surface of the rotor, and is opened so as to be inclined rearward with respect to the rotation direction of the rotor. The medium circulation type mill described in 1. 10. The medium circulation type mill according to claim 9, wherein a cross-sectional shape of the inner surface of the rotor is hexagonal.