JP2002204969A - Bead mill for pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bead mill for pipeline, with which secondary aggregated materials can be preliminarily dispersed in a sending liquid without precipitating them in a pipeline for sending a solid-liquid slurry solution. SOLUTION: A material supply port (3) is arranged on one side of a dispersing chamber (1) and a material discharging port (4) on the other side, and the ports (3) and (4) are respectively connected to the pipeline (L) so that a material to be treated is made to flow through the chamber (1). A treating gap (21) is formed in the dispersing chamber (1) by an outer peripheral stator (18) and an inner peripheral stator (20) for housing a dispersion medium (10), etc. A rotor (24) is inserted into the treating gap for circulating the dispersion medium on the inner and outer surfaces of the rotor by rotating the rotor. An outflow port (19) is formed on the stator existing on the inside of the rotor and a screen (32) is disposed so that the dispersion medium is not discharged from the port (19). The diameter of the dispersion medium (10), etc., is approximately two to four times that of a dispersion medium used in the wet-type dispersion device in a finishing process and the material to be treated is surely and preliminary dispersed in the chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid supply line for transferring a processing material such as a solid-liquid slurry solution in which solid particles are suspended in a liquid, so that the processing material can be preliminarily dispersed. The present invention relates to a pipeline bead mill.

[0002]

2. Description of the Related Art In the chemical industry in which paints and other various products are manufactured by agitation and other treatments, even when the viscosity of the treated material is high, or even when the solid-liquid slurry solution has a low or medium viscosity, it is homogeneous. In order to perform the stirring process, a relatively large power is required. In particular, in a dispersing machine such as a wet-type media dispersing machine that requires finer particles, a pre-treatment (premix) of stirring the processing material is performed before the processing material is supplied by the disperser. As a pretreatment, it is impossible to form primary particles of solid (powder) simply by stirring the material to be treated, and it is known that many secondary aggregates precipitate in a pipeline. Such precipitates have a great effect on the cleanability of pipelines and the like, and have been a problem of contamination.

[0003] In addition, due to the presence of a large amount of secondary aggregates as described above, it takes a long time to disperse the particles to a desired particle size when the treatment is performed with the above wet medium disperser or the like. A screen or the like is provided in the disperser to separate a dispersion medium such as a bead from a processing material. However, the screen tends to be clogged, which is one of the causes of a decrease in work efficiency. I was

[0004]

The problem to be solved by the present invention is as follows.
When a processing material such as a solid-liquid slurry solution is subjected to a dispersion treatment or the like as described above, a pipeline bead mill capable of loosening and predispersing secondary aggregates while the processing material passes through a liquid feed line is used. To provide.

[0005]

According to the present invention, there is provided a material supply port connected to a pipe for feeding a processing material on one side, and a material connected to the other end of the liquid feeding pipe on the other side. A dispersion chamber having a discharge port, a cylindrical outer peripheral stator provided in the dispersion chamber and opening toward the material supply port, and located inside the outer peripheral stator and opening toward the material discharge port; Inner circumference stator,
A processing gap formed between the two stators, a cylindrical rotor inserted into the processing gap so as to divide the processing gap into an outer gap and an inner gap, and rotate the rotor. Drive shaft,
A circulation port formed in the rotor so that the dispersion medium accommodated in the processing gap flows through the outer gap to the inner gap with the rotation of the rotor and returns to the outer gap; An outlet for discharging the processing material to the discharge port formed on the rotor, and a screen provided at the outlet for separating the dispersion medium from the processing material, the rotor facing the processing gap. The invention provides a pipeline bead mill in which the outer surface, the inner surface, the inner surface of the outer circumferential stator, and the outer surface of the inner circumferential stator are formed to be substantially smooth.

According to the present invention, the dispersing medium used in the pipeline bead mill has a particle diameter of about 2 to 4 times that of the dispersing medium used in the subsequent wet medium dispersing machine. Sumir is provided to achieve the above object.

[0007]

FIG. 1 shows an embodiment of the present invention.
A material supply port (3) is formed on one side of a main body (2) forming a dispersion chamber (1) so as to be connected to a pipe (L) for sending a processing material such as a solid-liquid slurry solution. On the other side, a material discharge port (4) is formed.

The main body (2) is constituted by connecting an inlet side member (5), an intermediate member (6) and a discharge side member (7) with bolts (8), respectively. The material supply port (3), the inflow chamber (9), and the input port (11) for the dispersion medium (10) such as a bead are formed in 5).
A drive shaft (14) driven by a motor (not shown) extends through the main body (12) and the cover plate (13).

The drive shaft (14) is provided with an axial flow blade so as to generate an axial flow toward the material discharge port through the intermediate member (6) in the flow of the processing material entering the inflow chamber (9). (15) is provided. As the axial flow blade (15), as shown in the figure, it is preferable to use a scraping blade having an action of scraping a processing material entering the inflow chamber toward the intermediate member (6). It can also be used.

The intermediate member (6) has an inwardly projecting edge (17) for forming an inflow port (16) projecting inward toward the center and inclined downward in an inverted conical shape, and an outer peripheral stator. The discharge side member (7) is provided with the material discharge port (4) and an inner circumference stator (20) formed with an outlet (19) communicating with the discharge port. Have been. The outer circumference stator
(18) and the inner circumference stator (20) are each formed in a cylindrical shape, and the inner circumference opening toward the material discharge port side inside the outer circumference stator (18) opening toward the material supply port side. A stator (20) is provided, and an annular and bottomed processing gap (21) is formed between the two stators. Although the two stators (18) and (20) are formed in a cylindrical shape, they may be formed in an appropriate polygonal cylindrical shape, and the processing medium (10) is provided in the processing gap (21). ... is stored.

In the processing gap (21), the inside of the processing gap is divided into an outer gap (22) and an inner gap (23), and the outer gap (2
A cylindrical rotor (24) is inserted from the opening side of the processing gap so as to communicate the inside gap (23) with the inner gap (23). The rotor (24)
Is a substantially frustoconical rotor end face (25) attached to the lower end of the drive shaft (14) and a cylindrical rotor connected to the rotor end face (25). It has a main body (26) and is rotated within the processing gap (21) by the drive shaft. The processing gap (2
The width of 1), in particular, the width of the outer gap (22) is formed to be substantially the same as that of a normal annular-type medium dispersing machine, and is set to a width that can effectively apply the shear force by the dispersion medium to the processing material. .

The rotor end face (25) and the inwardly projecting edge.
Between (17), a conical gap communicating with the outer gap (22)
(27) is formed. The outer surface of the rotor end face (25) facing the conical gap (27) and / or the inwardly projecting edge (17)
On the inner surface of the dispersion medium (10) preferably in the processing gap
An appropriate outflow prevention protrusion (28) is formed so that... Does not flow out from the inflow port (16) to the inflow chamber (9) through the conical gap (27).

FIG. 2 shows an example of the outflow prevention protrusion (28), which is formed so as to spirally protrude over the conical slope (29) and the cylindrical surface (30) of the rotor end face (25). The prevention projection (28) is formed. Thus, when the rotor rotates, the dispersion medium (1) which tries to enter the conical gap (27)
0) hit the projections (28) and are returned to the processing gap (21). It is to be noted that a spiral groove, a projection having a scraping action, or the like may be provided instead of the projection (not shown).

When the rotor (24) rotates, the dispersing medium (10) flows through the processing gap (21) by the rotor. Street inner gap (23)
The dispersion medium flowing to the outer gap (2)
A circulation port (31) is formed in the rotor (24) so as to return to (2). In the embodiment shown in the figure as the circulation port (31), two slots extending in the axial direction are provided on the peripheral surface of the rotor body (26).
Although provided at three locations, the circulation port (31) can be appropriately configured in terms of the formation site, size, number, shape, and the like.

The outlet (1) of the inner circumference stator (20)
9) a screen (32) having flow holes such as small holes, slits and meshes so as to separate the dispersion medium (10) from the processing material.
Are formed. In the figure, the inner peripheral stator is entirely covered for convenience of explanation, but the screen is provided only at the outlet port, and is a screen-like cylindrical screen.
(32) can be formed into any other suitable screen structure, and the lower part of the inner end of the rotor end face of the rotor and the upper end of the inner peripheral stator are appropriately shaped. These may be combined with each other to form a gap between both members to prevent the passage of the dispersion medium, thereby forming a so-called gap separator (not shown).

The rotor facing the processing gap (21)
The outer surface, the inner surface of (24), the inner surface of the outer circumferential stator (18), and the outer surface of the inner circumferential stator (20) are formed as substantially smooth surfaces, but form appropriate irregularities. You can also.

The processing gap (21) has a size of about 60 to
About 90% of the dispersion medium (10)... Is filled, and the processing material sent from the pipe (L) to the dispersion chamber through the material supply port (3) passes through the inlet (16) of the dispersion chamber (1). ) To processing gap
It enters the outer gap (22) of (21) and flows to the inner gap (23).
During this time, the dispersion medium (10) given the motion by the rotor (24) loosens the secondary aggregates in the processing material or breaks the solid particles by the impact force and the grinding force generated between the dispersion media. The processing material is preliminarily dispersed, and only the predispersed processing material flows from the material discharge port (4) to the pipe (L) through the screen (32) and the outlet (19). In addition,
The temperature may be adjusted by providing a jacket at an appropriate site such as the periphery of the dispersion chamber.

[0018] When compared in the paint production line,
The particle size of the secondary agglomerates when pretreated with a high-speed stirrer as in the prior art was about 250 to 350 μm, but by passing through the pipeline bead mill of the present invention one time. It could be about 50 μm or less.

The pipeline bead mill of the present invention can be used by being attached to an appropriate part in a pipeline. For example, as shown in FIG.
In a production line where the processing material is dispersed by a pump (P) using a normal wet-type medium disperser or the like (34),
A pipeline bead mill (35) of the present invention is mounted between (33) and a wet medium disperser (34).
The aggregate is loosened by (35) and then the wet medium dispersing machine (3
4) can be configured to supply.

When actually tested by the apparatus shown in FIG. 3, the size of the dispersion medium used in the wet medium disperser (34) and the size of the dispersion medium (10) used in the pipeline bead mill (35) are as follows. It was confirmed that when the size of the dispersion medium (10) was increased, preliminary dispersion was efficiently performed. That is, according to the experiment, the particle size of the dispersion medium (10) is
Good results were obtained when the particle size of the dispersion medium used in 4) was about 2 to 4 times, preferably about 3 times. With such a particle size, substantially the same results were obtained even when appropriate irregularities were formed on the surface of the rotor and other members facing the processing gap (21).

In the case of simple atomization, a processing material is circulated through a stirring tank (33) so as to repeatedly pass through the pipeline bead mill (35) of the present invention. The pipeline bead mill (3
5) may be incorporated (FIG. 3B).

In the case of further measuring fine particles, the above-mentioned FIG.
(B) The pipeline bead of the present invention is a line as shown in FIG.
The processing material is circulated by a smill (35) to loosen agglomerates, and after simple atomization, a conventional wet medium disperser
The pipeline may be configured to circulate (34) a plurality of times and distributed processing may be performed (FIG. 3C).

[0023]

According to the present invention, a dispersion chamber having a material supply port and a material discharge port connected to a pipe for supplying a processing material such as a solid-liquid slurry solution is formed as described above. A chamber is provided with a cylindrical outer circumferential stator and an inner circumferential stator inside thereof, a processing gap is formed between the two stators, and a rotor is inserted into the processing gap. The processing gap is divided into an outer gap and an inner gap, and when the rotor is rotated by a drive shaft, the dispersion medium accommodated in the processing gap flows through the outer gap to the inner gap and returns to the outer gap. B.
A circulation port is formed in the stator, and a screen for separating the dispersion medium is provided in an outlet formed in the inner peripheral stator, so that only the processing material flows through the material discharge port to the pipe, and the processing is performed. Since the surfaces of the members facing the gap are made substantially smooth, the secondary aggregates present in the solid-liquid slurry solution or the like are sufficiently loosened while entering the material supply port and flowing out of the material discharge port. It is pre-dispersed, so that the power of a stirrer such as a stirring tank can be reduced, and it is easy to form fine particles by a wet medium disperser.

When a dispersion medium having a larger particle diameter than the dispersion medium of the wet medium dispersion machine is used as described above, even if the surface of each member facing the processing gap is smooth, even if the uneven portion is formed. However, since the secondary aggregates can be surely loosened, the dispersion time by the wet medium disperser is reduced,
Clogging of the screen for separating the medium can be prevented, and even if the material does not need to be finely divided, the processing material can be made uniform and the processing efficiency can be improved.

Also, by using the pipeline bead mill of the present invention, a compact line can be formed as compared with a conventional batch type pre-treatment machine, and the line can be easily attached to the line, so that production efficiency can be improved.

[Brief description of the drawings]

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

FIG. 2 shows a rotor end face portion, (A) is a plan view,
(B) is a front view.

FIGS. 3A, 3B, and 3C are explanatory diagrams showing states of use, respectively.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Dispersion chamber 2 Main body 3 Material supply port 4 Material discharge port 9 Inflow chamber 10 Dispersion medium 14 Drive shaft 15 Axial flow blade 16 Inlet 17 Inwardly projecting edge
18 Outer circumference stator 19 Outlet 20 Inner circumference stator 21 Processing gap 22 Outer gap 23 Inner gap 24 Rotor 25 Rotor end face 26 Rotor body 27 Conical gap 28 Outflow prevention Protrusion
31 Circulating port 32 Screen 34 Wet media disperser
35 Pipeline bead mill

Claims (3)

[Claims] A dispersion chamber having a material supply port connected to a pipe for feeding a processing material on one side and a material discharge port connected to the other end of the liquid feeding pipe on the other side; A cylindrical outer circumferential stator provided on the side of the material supply port,
An inner circumferential stator located inside the outer circumferential stator and opening toward the material discharge port, a processing gap formed between the two stators, an outer gap and an inner gap in the processing gap; A cylindrical rotor inserted into the processing gap so as to partition the rotor, a driving shaft for rotating the rotor, and a dispersion medium accommodated in the processing gap are rotated by the rotation of the rotor. A circulation port formed in the rotor so as to flow through the outer gap to the inner gap and return to the outer gap, an outlet formed in the inner circumferential stator to flow the processing material to the discharge port, and An outer surface, an inner surface of the rotor facing the processing gap, and a screen provided at the outlet for separating the dispersion medium from the processing material;
A pipeline bead mill in which the inner surface of the outer circumferential stator and the outer surface of the inner circumferential stator are formed to be substantially smooth. 2. A pipe connected to the material discharge port is connected to a wet-type medium disperser, and the particle size of the dispersion medium accommodated in the processing gap is 2 times the particle size of the dispersion medium used in the wet-type medium disperser. The pipeline bead according to claim 1, wherein the pipeline bead is up to 4 times.
Zmir. 3. A dispersion chamber having a material supply port connected to a pipe for feeding a processing material on one side and a material discharge port connected to the other end of the liquid feed pipe on the other side. A cylindrical outer circumferential stator provided on the side of the material supply port,
An inner circumferential stator located inside the outer circumferential stator and opening toward the material discharge port, a processing gap formed between the two stators, an outer gap and an inner gap in the processing gap; A cylindrical rotor inserted into the processing gap so as to partition the rotor, a driving shaft for rotating the rotor, and a dispersion medium accommodated in the processing gap are rotated by the rotation of the rotor. A circulation port formed in the rotor so as to flow through the outer gap to the inner gap and return to the outer gap, an outlet formed in the inner circumferential stator to flow the processing material to the discharge port, and A screen provided at the outlet for separating the dispersion medium from the processing material is provided, and a pipe connected to the material discharge port is connected to a wet medium disperser, and the particle size of the dispersion medium accommodated in the processing gap is set to Having a particle size of 2 to 4 times the particle size of the dispersion medium used in the wet medium disperser - Zumiru.