JP5678381B2 - Centrifugal dispersion device - Google Patents

Description

  According to the present invention, a rotor having a rotor blade on a radially outer side can be driven to rotate inside a casing having a cylindrical outer peripheral wall portion whose both end openings are closed by a front wall portion and a rear wall portion. A cylindrical stator arranged concentrically in a state and having a plurality of through holes arranged in the circumferential direction is concentrically positioned on the front side of the rotor on the front wall side and on the inner side of the rotor blade. An annular blade chamber around which the rotor blade circulates is formed between the stator and the outer peripheral wall portion of the casing, an annular groove is formed on the inner surface of the front wall portion, and On the front side of the rotor facing the front wall portion, a scraping piece is disposed so as to be able to circulate integrally with the rotor in a state where the tip portion enters the annular groove, and the dispersoid and the liquid phase dispersion medium And the pre-mixed premixed with the casing by rotating the rotor blades. An inlet for sucking and introducing into the inside is provided in the front wall portion in a state of communicating with the annular groove, and a discharge port for discharging a generated fluid generated by mixing a dispersoid and a liquid phase dispersion medium, The present invention relates to a centrifugal disperser provided on the outer peripheral wall in a state communicating with the blade chamber.

Such a centrifugal dispersion device (hereinafter may be simply referred to as a dispersion device) sucks and introduces a preliminary mixture of a dispersoid and a liquid phase dispersion medium from an introduction port by a suction action by rotation of a rotary blade, The dispersoid and the liquid phase dispersion medium are further mixed, and the generated fluid generated by the mixing is discharged from the discharge port by the centrifugal force generated by the rotation of the rotor blades.
That is, the scraping piece is made to circulate integrally with the rotor in a state where the tip portion thereof enters the annular groove, and the preliminary mixture introduced into the annular groove from the introduction port is scraped by the tip portion of the scraping piece, thereby The mixture is sheared and finely crushed and the flow of the premix is disturbed to mix the dispersoid and the liquid phase dispersion medium.

Hereinafter, among the side surfaces at the tip of the scraped piece, the side surface facing the radially outward side of the rotor is described as an outward side surface, the side surface facing the radially inward side of the rotor is described as an inward side surface, and Among the inner surfaces of the annular groove, the inner surface that is located on the radially outer side of the rotor and faces the radially inner side is described as the inner surface, and the inner surface that is located on the radially inner side of the rotor is the radially outer side. The inner surface facing the outer side is described as an outward inner surface, and the shearing action of the premix by the scraped pieces is explained.
That is, when the tip of the scraped piece enters the annular groove, the outward side surface of the tip of the scraped piece and the inward inner surface of the annular groove face each other, and the inward side surface and the annular groove of the tip of the scraped piece Will face each other.

  Then, when the scraped piece circulates in a state in which the tip portion enters the annular groove, the outward side surface of the tip portion of the scraped piece and the annular groove are mainly used for the preliminary mixture introduced into the annular groove from the introduction port. A shearing action is exerted in two regions between the inner surface and the inner surface of the tip of the scraped piece and the outer surface of the annular groove. The premixture is finely crushed by the shearing action, and the shearing action acts to disturb the flow of the premixture so that the dispersoid and the liquid phase dispersion medium are mixed.

Incidentally, examples of the dispersoid include powder, examples of the liquid-phase dispersion medium include a solvent, and examples of the production fluid include a powder produced by dissolving powder in a solvent.
The powder is not particularly excluded as long as it is a powder, for example, a chemical raw material such as a battery electrode material, a food raw material such as skim milk powder or wheat flour, a pharmaceutical raw material, etc. Examples thereof include fine particles (including a mixture of these powders). The powder includes a granular material. Moreover, as a solvent, if it is a solvent which can melt | dissolve powder favorably, it will not specifically exclude, For example, water can be illustrated.

In such a dispersing apparatus, conventionally, the scraping piece is provided in a state where it exists at one place in the radial direction of the rotor, and the annular groove corresponds to the scraping piece that exists at one place in the radial direction of the rotor. , Provided (for example, see Patent Document 1).
In Patent Document 1, a plurality of scraped pieces are arranged in a line in the circumferential direction in a state of being located at the same position in the radial direction of the rotor.

JP 2007-216172 A

  However, in the conventional dispersion device, the scraped piece exists only at one position in the radial direction of the rotor, so that the shear force is applied only to two different regions in the radial direction of the rotor with respect to the preliminary mixture introduced from the introduction port. It cannot be allowed to act, and the turbulence of the premix cannot be sufficiently disturbed. In particular, the higher the proportion of dispersoid (for example, powder), the lower the fluidity, the more likely the agglomerates of the dispersoid (so-called lumps) are generated, and the lumps generated are likely to be large. Mixing with the liquid phase dispersion medium could not be performed sufficiently, and improvement was desired.

That is, as an application of the product fluid generated by mixing the dispersoid and the liquid phase dispersion medium, for example, there is an application of forming a film or a member having the dispersoid as a main component on an object. In this application, for example, by performing a process such as heating after applying the generated fluid to the object, the liquid phase dispersion medium is evaporated to form a film or member mainly composed of the dispersoid. In such an application, it is desired to reduce the ratio of the liquid phase dispersion medium in the preliminary mixture to improve the processing efficiency.
However, if the ratio of the liquid phase dispersion medium in the preliminary mixture is lowered in order to increase the efficiency of the treatment, the fluidity of the preliminary mixture is lowered. The dispersoid and the liquid phase dispersion medium could not be sufficiently mixed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a centrifugal dispersion device that can suppress the occurrence of lumps and improve the mixing ability of the dispersoid and the liquid phase dispersion medium. There is.

In order to achieve the above object, a centrifugal dispersion device according to the present invention comprises:
A rotor with a rotor blade on the radially outer side is concentric in a freely rotatable manner inside a casing having a cylindrical outer peripheral wall with both end openings closed by a front wall and a rear wall. A cylindrical stator having a plurality of through holes arranged in the circumferential direction is concentrically fixedly disposed on the front side of the rotor on the front wall side and on the inner side of the rotor blade. An annular blade chamber around which the rotor blades circulate is formed between the stator and the outer peripheral wall portion of the casing; an annular groove is formed on the inner surface of the front wall portion; and On the front side of the opposed rotor, a scraping piece is disposed so as to be able to circulate integrally with the rotor with its tip part entering the annular groove, and the dispersoid and the liquid phase dispersion medium are premixed. The premixed mixture is moved into the casing by rotating the rotor blades. An inlet for introduction is provided in the front wall in a state of communicating with the annular groove, and an outlet for discharging a generated fluid generated by mixing a dispersoid and a liquid phase dispersion medium is the blade chamber A centrifugal dispersion device provided on the outer peripheral wall in a state communicating with
As for the characteristic configuration, a plurality of the scraped pieces are provided with different positions in the radial direction of the rotor,
A plurality of the annular grooves are provided concentrically corresponding to the scraped pieces respectively provided at different positions in the radial direction of the rotor ,
At each of the different positions in the radial direction of the rotor, a plurality of the scraped pieces are arranged in the circumferential direction, and a plurality of concentric scraped piece rows are formed,
The plurality of scraped pieces constituting each of the scraped piece rows are arranged at equal intervals in the circumferential direction and arranged so that the arranged phase in the circumferential direction is different between the scraped piece rows adjacent to each other,
Each scraped piece is formed in a rod shape, and is positioned closer to the front wall portion side toward the distal end side of the rod-shaped scraped piece in the radial direction of the rotor, and in the axial direction view of the rotor, In the inclined posture located on the radially inner side of the rotor toward the distal end side, the base end portion of the bar-like scraped piece is fixed so as to rotate integrally with the rotor,
The rotor is rotationally driven in a direction in which the tip of the scraped piece is the front side in the axial direction view,
A plurality of scraping pieces constituting the adjacent scraping piece rows are formed in the axial direction of the rotor in the direction of the proximal end of the scraping piece in the inner row and the scraping pieces in the outer row corresponding to the scraping piece. It is in the point which is arrange | positioned in the circumferential direction in the form which overlaps with the part at the front end side .

According to the above characteristic configuration, the plurality of scraped pieces respectively located at different positions in the radial direction of the rotor circulate integrally with the rotor in a state where the tip portion enters the corresponding annular groove, so that the introduction port The shearing force can be applied to each of the two regions in the plurality of different positions through which the scraped pieces in the radial direction of the rotor pass (hereinafter sometimes referred to as scraped piece passing positions). As a result, it is possible to increase the number of places where a shearing force is applied in the radial direction of the rotor to the preliminary mixture introduced from the introduction port.
Also, in the region where the scraped piece passes in the radial direction of the rotor, the preliminary mixture scraped by the tip of the scraped piece collides and is mixed.
As a result, the premix can be pulverized sufficiently finely, and the flow of the premix can be sufficiently disturbed to reduce lumps as much as possible, and even if dams occur. The lumps can be finely crushed to reduce the size.

By the way, when the scraping piece is provided in a single location in the radial direction of the rotor as in the prior art, the width of the scraping piece in the radial direction of the rotor is set to the width of the rotor as in this characteristic configuration. It is assumed that the width is equivalent to the total width of the plurality of scraped pieces provided at different positions in the radial direction.
However, even if the width of the scraped piece is widened in this way, the shear force can be applied to the preliminary mixture introduced from the introduction port because it remains in two regions in the radial direction of the rotor. The effect of finely crushing the preliminary mixture and the effect of causing disturbance in the flow of the preliminary mixture cannot be improved.
Therefore, it is possible to provide a centrifugal dispersion device that can suppress the occurrence of lumps and improve the mixing ability (dispersibility) of the dispersoid and the liquid phase dispersion medium.

According to the above characteristic configuration, the number of scraped pieces arranged in the circumferential direction with respect to the preliminary mixture introduced from the inlet during each rotation of the plurality of scraped piece passing positions in the radial direction of the rotor. Since the shear force can be applied the same number of times as described above, the premix can be further finely crushed, and the flow of the premix can be further disturbed to further reduce the occurrence of lumps.
Therefore, the generation of lumps can be further suppressed, and the mixing ability of the dispersoid and the liquid phase dispersion medium can be further improved.

According to the above characteristic configuration, at the scraping piece passing positions adjacent to each other in the radial direction of the rotor, the scraping pieces pass alternately, and a shearing force can be applied alternately to the preliminary mixture introduced from the inlet. Therefore, while reducing the number of scraped pieces constituting each scraped piece row, it is possible to apply a shear force to the preliminary mixture introduced from the inlet more times during one rotation of the rotor. it can.
That is, since the pressure pulsation can be generated at a high frequency with respect to the preliminary mixture in the introduction chamber, it is possible to further improve the action of finely crushing the preliminary mixture and the action of causing disturbance in the flow of the preliminary mixture. As a result, the occurrence of lumps can be further suppressed.
Therefore, generation of lumps can be further suppressed, and the mixing ability of the dispersoid and the liquid phase dispersion medium can be further improved.

According to the above characteristic configuration, the portion of the scraped piece located outside the annular groove is inclined so as to face radially outward with respect to the radial direction of the rotor as viewed in the axial direction of the rotor. The preliminary mixture scraped from the annular groove by the tip of the scraped piece that enters and circulates into the annular groove flows outward in the radial direction of the rotor by the portion of the scraped piece located outside the annular groove. Be guided to.
That is, the plurality of scraping pieces that circulate at a plurality of different positions in the radial direction of the rotor scrape the preliminary mixture introduced into the annular groove from the introduction port, and the scraped preliminary mixing is outside the radial direction of the rotor. Therefore, the preliminary mixture introduced into the casing from the introduction port can be well mixed while suppressing retention and discharged from the discharge port as a product fluid.
Therefore, it is possible to efficiently generate a product fluid in which the dispersoid and the liquid phase dispersion medium are well mixed.

According to the above characteristic configuration, the preliminary mixture that is scraped by the scraped piece of the inner scraped piece row of the adjacent scraped piece rows and is guided to move radially outward of the rotor is Since it is pressed between the proximal end of the scraped piece and the distal end of the scraped piece of the outer scraped piece row, it is subjected to a compression action, so that it is further crushed and promotes the pulverization and mixing of the preliminary mixture. be able to.
Therefore, the mixing ability of the dispersoid and the liquid phase dispersion medium can be further improved.

The centrifugal disperser according to the present invention is further characterized in that a return port for returning a part of the generated fluid discharged from the discharge port into the casing through a circulation path is provided in the front wall portion. ,
A partition that partitions the inner peripheral side of the stator into an introduction chamber on the front wall side and a return chamber on the rotor side is provided in a state of rotating integrally with the rotor on the front side of the rotor, and the partition The scraped piece is provided on the front wall side of the
The introduction chamber and the return chamber are configured to communicate with the blade chamber through a plurality of through holes of the stator,
The introduction port communicates with the introduction chamber, and the return port communicates with the return chamber.

According to the above characteristic configuration, the preliminary mixture is introduced into the introduction chamber from the introduction port, mixed by the shearing action of the scraped pieces in the introduction chamber, and further subjected to the shearing action when passing through the through hole. Mixed and flows into the blade chamber. On the other hand, a part of the generated fluid discharged from the discharge port is introduced into the return chamber from the return port through the circulation path, further mixed in the return chamber, and further subjected to a shearing action when passing through the through hole. And flows into the wing chamber.
The generated fluid that has passed through the through hole from the introduction chamber and flowed into the blade chamber and the generated fluid that has passed through the through hole from the return chamber and flowed into the blade chamber are mixed by the rotating blades that circulate in the blade chamber. It is discharged from the discharge port.
That is, after a part of the generated fluid discharged from the discharge port is returned to the return chamber and further mixed in the return chamber, the preliminary mixture is mixed in the introduction chamber and mixed with the generated product fluid and mixed from the discharge port. Since the preliminary mixture introduced from the introduction chamber is mixed in a discharge form, generation of lumps can be suppressed as much as possible, and the dispersoid and the liquid phase dispersion medium can be appropriately mixed.
Accordingly, it is possible to generate a product fluid in which the dispersoid and the liquid phase dispersion medium are appropriately mixed.

Schematic configuration diagram of a powder dissolution system equipped with a centrifugal dispersion device Longitudinal sectional view showing the main part of the fixed-quantity supply device Sectional view in III-III direction view of FIG. Longitudinal side view of centrifugal disperser Sectional view in the VV direction view of FIG. Sectional view in the VI-VI direction view of FIG. The exploded perspective view which shows the assembly structure of the front wall part of a casing, a stator, and a partition body The figure explaining arrangement | positioning structure of the scraping piece to a partition body Perspective view of scraped piece The figure which shows the simulation result of the flow state of the preliminary | backup mixture in the introduction chamber at the time of arrange | positioning a scraping piece by 2 rows different phase arrangement | positioning form The figure which shows the simulation result of the flow state of the preliminary | backup mixture in the introduction chamber at the time of a scraping piece being arrange | positioned with 2 rows and the same phase arrangement | positioning form The figure which shows the simulation result of the flow state of the preliminary | backup mixture in the introduction chamber at the time of a scraping piece being arrange | positioned with 1 row arrangement | positioning form The figure which shows the result of simulating the pressure distribution in the vicinity of the inlet in the introduction room

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a powder dissolution system equipped with a centrifugal dispersion device (hereinafter sometimes simply referred to as a dispersion device) Y according to the present invention.
In this powder dissolution system, the powder P is used as a dispersoid, the solvent R is used as a liquid phase dispersion medium, and the powder P is dissolved in the solvent R to generate a paste F as a product fluid.
In the present embodiment, for example, CMC (carboxyl methyl cellulose) is used as the powder P, and water is used as the solvent R.

  As shown in FIG. 1, the powder dissolution system includes a quantitative supply device X that supplies powder P in a fixed amount, a solvent supply device 50 that supplies solvent R in a fixed amount, and a powder P that is supplied in a fixed amount from the quantitative supply device X. And the solvent R containing the powder P not completely dissolved from the paste F discharged from the dispersion device Y, and the dispersion device Y that sucks and mixes the negative pressure and the solvent R that is quantitatively supplied from the solvent supply device 50 R (hereinafter referred to as undissolved paste Fr) is provided with a separation device 70 and the like.

  As shown in FIG. 1, the quantitative supply device X includes a hopper 31 that discharges the powder P received from the upper opening 31a from the lower opening 31b, an agitation mechanism 32 that agitates the powder P in the hopper 31, In a state where the upper opening 31a of the hopper 31 is opened to the atmosphere, a negative pressure suction force acting on the lower opening 31b by suction of the dispersing device Y connected to the downstream side of the lower opening 31b causes the lower opening 31b to A positive displacement supply mechanism 40 that supplies the discharged powder P to the dispersing device Y is provided.

  The hopper 31 is formed in an inverted conical shape that is reduced in diameter as it goes from the upper part to the lower part, and its central axis A1 is arranged in a posture along the vertical direction. Each of the upper opening 31a and the lower opening 31b of the hopper 31 has a cross-sectional shape (in top view) that is circular with the central axis A1 as the center, and the angle of inclination of the inner wall surface of the inverted conical shape in the hopper 31. Is approximately 60 degrees with respect to the horizontal plane.

  The stirring mechanism 32 is disposed in the hopper 31 and has a stirring blade 32A that stirs the powder P in the hopper 31, a blade driving motor M1 that rotates the stirring blade 32A around the central axis A1 of the hopper 31, An attachment member 32B that supports the blade drive motor M1 positioned above the upper opening 31a of the hopper 31 and a transmission member 32C that transmits the rotational driving force of the blade drive motor M1 to the stirring blade 32A are configured. .

  The stirring blade 32A is configured by bending a rod-like member into a substantially V-shape, with one side portion thereof being along the inner wall surface of the hopper 31, and the other side portion being at the center axis A1 of the hopper 31. It is coaxially and rotatably supported. Further, the stirring blade 32A has a triangular cross-sectional shape, and is disposed so that a surface forming one side of the triangle is substantially parallel to the inner wall surface of the hopper 31. Accordingly, the stirring blade 32A is disposed so as to be rotatable around the central axis A1 along the inner wall surface of the hopper 31.

As shown in FIGS. 1 to 3, the positive displacement quantitative supply mechanism 40 is a mechanism that quantitatively supplies a predetermined amount of the powder P supplied from the lower opening 31 b of the hopper 31 to the dispersing device Y on the downstream side. .
Specifically, the introduction part 41 connected to the lower opening part 31 b of the hopper 31, the casing 43 provided with the supply port 43 a and the discharge port 43 b, and the measuring rotator 44 rotatably disposed in the casing 43. And a metering rotator drive motor M2 that rotationally drives the metering rotator 44.

  The introduction part 41 is formed in a cylindrical shape that communicates the lower opening 31b of the hopper 31 and the supply port 43a formed in the upper part of the casing 43, and has a slit having the same shape as the supply port 43a of the casing 43 at the lowermost end. A shaped opening is formed. The introduction portion 41 is formed in a tapered shape that becomes thinner toward the supply port 43 a side of the casing 43. The shape of the slit-shaped opening can be appropriately set according to the size of the hopper 31, the supply amount of the powder P, the characteristics of the powder P, and the like. The dimension is set to about 20 to 100 mm, and the dimension in the width direction is set to about 1 to 5 mm.

The casing 43 is formed in a substantially rectangular parallelepiped shape, and is connected to the hopper 31 via the introduction part 41 in a posture inclined by 45 degrees with respect to the horizontal direction.
As shown in FIGS. 2 and 3, the upper surface of the casing 43 is provided with a slit-shaped supply port 43 a corresponding to the slit-shaped opening of the introduction portion 41, and the powder P from the lower opening 31 b of the hopper 31 is provided. Can be supplied into the casing 43. At the lower part of the lower side surface (right side surface in FIG. 2) of the casing 43 arranged in an inclined manner, the powder P, which is quantitatively supplied by the metering rotator 44, is disposed downstream through the expansion chamber 47. A discharge port 43b for discharging to Y is provided, and a powder discharge tube 45 is connected to the discharge port 43b. The expansion chamber 47 is provided at a position in the casing 43 to which the powder P supplied from the supply port 43a to the powder storage chamber 44b of the measuring rotator 44 is supplied in a fixed amount, and is operated by the negative pressure acting from the discharge port 43b. The force is maintained at a lower pressure than the supply port 43a (for example, about −0, 06 MPa). That is, the discharge port 43b is connected to the primary side of the dispersion device Y, so that the negative pressure suction force acts on the expansion chamber 47 and is maintained in a lower pressure state than the supply port 43b. As the measurement rotating body 44 rotates, the state of each powder storage chamber 44b is changed to a negative pressure state (for example, about −0, 06 MPa) and a higher pressure state than the negative pressure state. .

  The measuring rotator 44 has a disk member 49 disposed on the drive shaft 48 of the measuring rotator driving motor M <b> 2, and a plurality of (e.g., eight) plate-shaped partition walls 44 a radially excluding the central portion of the disk member 49. A plurality of powder storage chambers 44b (for example, eight chambers) are formed at equal intervals in the circumferential direction. The powder storage chamber 44 b is configured to open at the outer peripheral surface and the center portion of the measuring rotary body 44. An opening closing member 42 is unevenly distributed in the central direction of the measuring rotating body 44 and is fixedly arranged. The opening on the center side of each powder storage chamber 44b is closed or opened according to the rotation phase. It is configured to be possible. The supply amount of the powder P can be adjusted by changing the number of rotations of the measuring rotator 44 by the measuring rotator driving motor M2 that rotationally drives the measuring rotator 44.

  With the rotation of the measuring rotator 44, each powder storage chamber 44b is opened to the expansion chamber 47, opened to the expansion chamber 47, the first sealed state not communicating with the expansion chamber 47 and the supply port 43a, and opened to the supply port 43a. The supply port is opened and the supply port 43a and the expansion chamber 47 are communicated with each other in the order of the second sealed state. The casing 43 is formed such that the opening on the outer peripheral surface side of the measuring rotator 44 is closed in the first sealed state and the second sealed state, and the opening on the center side of the measuring rotator 44 is the first sealed. The opening closing member 42 is fixedly disposed on the casing 43 so as to be closed in the state, the supply port open state, and the second sealed state.

  Therefore, in the quantitative supply device X, the powder P stored in the hopper 31 is supplied to the quantitative supply mechanism 40 while being stirred by the stirring blade 32A, and the powder P is discharged from the discharge port 43b by the quantitative supply mechanism 40. A fixed amount is supplied to the dispersing device Y through the body discharge pipe 45.

  More specifically, the pressure in the expansion chamber 47 in the casing 43 is in a negative pressure state (for example, −0) due to the negative pressure suction force from the dispersion device Y connected to the downstream side of the discharge port 43b of the constant supply mechanism 40. , About 06 MPa). On the other hand, since the upper opening 31a of the hopper 31 is open to the atmosphere, the inside of the hopper 31 is in a state of about atmospheric pressure. The inside of the introduction part 41 and the vicinity of the lower opening 31b communicating with each other through the gap between the expansion chamber 47 and the metering rotator 44 are in a pressure state between the negative pressure state and the atmospheric pressure state.

  In this state, the powder P in the vicinity of the inner wall surface of the hopper 31 and the lower opening 31b is stirred by the stirring blade 32A of the stirring mechanism 32, whereby the powder P in the hopper 31 is sheared by the stirring blade 32A. On the other hand, the metering rotator 44 is rotated by the metering rotator drive motor M2, so that the empty powder storage chambers 44b are in continuous communication with the supply port 43a. Then, the powder P in the hopper 31 flows down through the introduction portion 41 from the lower opening 31b and is stored in a predetermined amount in the powder storage chamber 44b of the measuring rotary body 44 that is in communication with the supply port 43a one after another. The powder P stored in the powder storage chamber 44b flows down to the expansion chamber 47 and is discharged from the discharge port 43b. Accordingly, the fixed amount supply device X can continuously supply the powder P to the mixing inlet 11 of the dispersion device Y continuously by a predetermined amount through the powder discharge pipe 45.

  As shown in FIG. 1, the powder discharge pipe 45 is provided with a shutter valve 46 capable of stopping the supply of the powder P to the mixing inlet 11 of the dispersing device Y.

As shown in FIG. 1, the solvent supply device 50 is configured to continuously supply the solvent R from the solvent source 51 to the mixing inlet 11 of the dispersion device Y at a set flow rate.
Specifically, the solvent supply device 50 includes a solvent source 51 that sends the solvent R, a solvent supply pipe 52 that sends the solvent R from the solvent source 51, and a solvent that is sent from the solvent source 51 to the solvent supply pipe 52. A flow rate adjusting valve (not shown) that adjusts the flow rate of R to a set flow rate, and the solvent R adjusted to the set flow rate are mixed with powder P that is quantitatively supplied from the quantitative supply mechanism 40 and supplied to the mixing inlet 11. And a mixing mechanism 60.

As shown in FIG. 4, the mixing mechanism 60 includes a mixing member 61 that connects the powder discharge pipe 45 and the solvent supply pipe 52 to the mixing inlet 11.
The mixing member 61 is configured to have a smaller diameter than the cylindrical mixing inlet 11 and is disposed in an inserted state in the mixing inlet 11 so as to form an annular slit 63 between the mixing inlet 11. An annular flow path forming portion 65 that forms an annular flow path 64 in the outer peripheral portion of the mixing inlet 11 in a state where it communicates with the annular portion 63 and the annular slit 63 over the entire circumference.
The powder discharge pipe 45 is connected to the mixing member 61 in a state of communicating with the cylindrical portion 62, and the solvent supply pipe 52 is connected to supply the solvent R to the annular flow path 64 in the tangential direction. The
The powder discharge pipe 45, the cylindrical portion 62 of the mixing member 61, and the mixing inlet 11 are inclined so that their axis A2 is inclined so that the supply direction is downward (the angle with respect to the horizontal plane is about 45 degrees). Are arranged.

That is, the powder P discharged from the discharge port 43 b of the fixed amount supply mechanism 40 to the powder discharge tube 45 is introduced into the mixing inlet 11 along the axis A <b> 2 through the cylindrical portion 62 of the mixing member 61. On the other hand, since the solvent R is supplied to the annular flow path 64 from the tangential direction, the solvent R is in a state of a hollow cylindrical vortex without a break through the annular slit 63 formed on the inner peripheral side of the annular flow path 64. It is supplied to the mixing inlet 11.
Therefore, the powder P and the solvent R are uniformly premixed by the cylindrical mixing inlet 11, and the preliminary mixture Fp is sucked into the dispersing device Y.

Based on FIGS. 4 to 9, the dispersion device Y will be described.
4 is a longitudinal side view of the dispersing device Y, FIG. 5 is a view taken along the arrow VV in FIG. 4, and FIG. 6 is a view taken along the arrow VI-VI in FIG. FIG. 7 is an exploded perspective view showing an assembled configuration of the front wall portion 2 of the casing 1, the stator 7, and the partition body 15. FIGS. 8A and 8B are diagrams for explaining the arrangement of the scraped pieces 9 on the partition 15, wherein FIG. 8A is a front view, FIG. 8B is a side view, and FIG. 8C is a rear view. FIG. 9 is a perspective view of the scraped piece 9.

  As shown in FIG. 4, the dispersing device Y includes a casing 1 having a cylindrical outer peripheral wall portion 4 whose opening at both ends is closed by a front wall portion 2 and a rear wall portion 3, and a concentric structure inside the casing 1. The rotor 5 is provided so as to be rotatably driven, a cylindrical stator 7 concentrically fixed inside the casing 1, a pump drive motor M 3 that rotationally drives the rotor 5, and the like. ing.

As shown in FIG. 5, on the outer side in the radial direction of the rotor 5, a plurality of rotor blades 6 protrude to the front side, which is the front wall portion 2 side, and are arranged at equal intervals in the circumferential direction. And is provided as a unit.
The cylindrical stator 7 is provided with a plurality of through-holes 7a and 7b arranged in the circumferential direction, and the stator 7 is positioned on the front side of the rotor 5 and on the inner side in the radial direction of the rotor blade 6. An annular blade chamber 8 around which the rotating blade 6 circulates is formed between the stator 7 and the outer peripheral wall portion 4 of the casing 1.
As shown in FIGS. 4, 6, and 7, an annular groove 10 is formed on the inner surface of the front wall portion 2 of the casing 1, and a scraped piece is disposed on the front side of the rotor 5 facing the front wall portion 2. 9 is disposed so as to be able to circulate integrally with the rotor 5 in a state in which the tip end portion 9T enters the annular groove 10.

As shown in FIGS. 4 to 7, a mixing introduction port 11 (into the introduction port) for sucking and introducing the premixed mixture Fp in which the powder P and the solvent R are premixed into the casing 1 by the rotation of the rotary blade 6. Is provided on the front wall portion 2 in communication with the annular groove 10.
As shown in FIGS. 4 and 5, the cylindrical discharge port 12 that discharges the paste F as the generated fluid generated by mixing the powder P and the solvent R communicates with the blade chamber 8. And provided on the outer peripheral wall 4.

As shown in FIGS. 1 and 4, in this embodiment, the paste F (corresponding to the generated fluid) discharged from the discharge port 12 is supplied to the separation device 70 through the discharge path 18, and the separation device 70 A return port 17 for returning the separated undissolved paste Fr (corresponding to a part of the generated fluid) into the casing 1 through the circulation path 16 is provided in the front wall portion 2 of the casing 1.
As shown in FIGS. 4 to 7, a partition 15 that partitions the inner peripheral side of the stator 7 into an introduction chamber 13 on the front wall 2 side and a return chamber 14 on the rotor 5 side is provided on the front side of the rotor 5. In addition to being provided in a state of rotating integrally with the rotor 5, a scraping piece 9 is provided on the front wall 2 side of the partition 15.
As shown in FIG. 4, the introduction chamber 13 and the return chamber 14 are configured to communicate with the blade chamber 8 through the plurality of through holes 7 a and 7 b of the stator 7, and the mixing introduction port 11 is configured as the introduction chamber. 13 and the return port 17 communicates with the return chamber 14.
Specifically, the introduction chamber 13 and the blade chamber 8 are communicated with each other through a plurality of introduction chamber side through-holes 7a arranged at equal intervals in the circumferential direction at a portion facing the introduction chamber 13 in the stator 7, and the return chamber. 14 and the blade chamber 8 are communicated with each other through a plurality of return chamber side through-holes 7b disposed at equal intervals in the circumferential direction at a portion facing the return chamber 14 in the stator 7.

  And in this invention, as shown in FIGS. 4-8, the scraping piece 9 is provided with two or more in the state which varied the position in the radial direction of the rotor 5, and the cyclic | annular groove | channel 10 is the radial direction of the rotor 5. A plurality of concentric pieces (two in FIG. 4) are provided corresponding to the scraping pieces 9 provided at different positions.

In this embodiment, at each of the different positions in the radial direction of the rotor 5, a plurality of scraped pieces 9 are arranged in the circumferential direction, and a plurality of concentric scraped piece rows L are formed.
Further, the plurality of scraping pieces 9 constituting each of the scraping piece rows L are arranged at equal intervals in the circumferential direction so that the arrangement phases in the circumferential direction are different between the scraping piece rows L adjacent to each other. .
Specifically, two scraped piece rows L are formed concentrically, and in each of the scraped piece rows L, four scraped pieces 9 are arranged in the circumferential direction at a center phase with an interval of 90 degrees. It is arranged. Further, the arrangement phase of the four scraping pieces 9 in the inner scraping piece row L is shifted from the arrangement phase of the four scraping pieces 9 in the outer scraping piece row L.

  In the following description and drawings, in order to indicate the inner and outer positions of the two scraped piece rows L, the suffix “i” indicating the inner side is attached to the reference symbol “L” indicating the scraped piece row, “Li” indicates an inner scraped piece row, an outer suffix “o” is added, and “Lo” indicates an outer scraped piece row.

A description will be given of each part of the dispersion device Y.
As shown in FIG. 4, the rotor 5 is configured to have a shape in which the front surface bulges substantially in a truncated cone shape, and is arranged on the outer peripheral side at equal intervals with a plurality of rotating blades 6 protruding forward. Is provided.
The rotor 5 is connected to a drive shaft 19 of a pump drive motor M3 inserted through the rear wall 3 and inserted into the casing 1 in a state of being concentrically positioned with the casing 1 in the casing 1, and the pump It is rotationally driven by the drive motor M3.

As shown in FIGS. 4, 7, and 8, the partition 15 is configured in a generally funnel shape having an outer diameter slightly smaller than the inner diameter of the stator 7 described later. Specifically, the funnel-shaped partition 15 includes a funnel-shaped portion 15b opened at a central sliding portion with a cylindrical sliding contact portion 15a projecting in a cylindrical shape, and the funnel-shaped portion 15b. In the outer peripheral part of this, it is comprised in the shape provided with the cyclic | annular flat plate part 15c used as the state orthogonal to the axial center A3 of the casing 1 in the front surface and rear surface.
As shown in FIGS. 4 and 5, the partition 15 has a plurality of locations spaced at equal intervals in the circumferential direction with the top cylindrical sliding contact portion 15 a facing the front wall 2 side of the casing 1. It is attached to the front surface of the rotor 5 via the spacing members 20 arranged in (four places in this embodiment).

  As shown in FIGS. 5 and 8 (c), when the partition 15 is attached to the rotor 5 via the spacing member 20 at each of a plurality of locations, the stirring blade 21 is placed on the rear wall 3 side of the casing 1. The four agitating blades 21 are configured to rotate integrally with the rotor 5 when the rotor 5 is rotationally driven by being integrally assembled to the partition 15 in a posture to face.

As shown in FIGS. 4 and 7, in this embodiment, the cylindrical return port 17 is concentric with the casing 1 and provided at the center of the front wall 2 of the casing 1.
As shown in FIGS. 4 to 7, the mixing introduction port 11 is a casing in which the opening that opens into the casing 1 includes a part in the circumferential direction of the two concentric annular grooves 10 inside. 1 is provided on the front wall portion 2 so as to be located laterally of the opening portion of the return port 17 with respect to the inside. The mixing inlet 11 has a shaft center A2 parallel to the axis A3 of the casing 1 in a plan view and the axis A2 in the horizontal direction perpendicular to the axis A3 of the casing 1 in the front wall portion of the casing. 2 is provided on the front wall portion 2 of the casing 1 in a downward inclined posture that approaches the axis A <b> 3 of the casing 1 as it approaches 2. Incidentally, the downward inclination angle of the mixing inlet 11 with respect to the horizontal direction is about 45 degrees as described above.

As shown in FIGS. 4 and 7, the stator 7 is attached to the inner surface of the front wall portion 2 of the casing 1 (surface facing the rotor 5), and the front wall portion 2 of the casing 1 and the stator 7 are integrally formed. It is fixed to become.
As shown in FIG. 5, the discharge port 12 is provided in the cylindrical outer peripheral wall portion 4 so as to extend in the tangential direction of the outer peripheral wall portion 4.

  As shown in FIGS. 6 to 9, in this embodiment, each scraped piece 9 is formed in a rod shape, and the distal end side of the rod-shaped scraped piece 9 is closer to the front wall portion 2 side in the radial direction of the rotor 5. In addition, the base end portion 9B of the bar-shaped scraping piece 9 has an inclined posture that is located on the radially inner side of the rotor 5 toward the distal end side of the bar-shaped scraping piece 9 in the axial direction of the rotor 5. The rotor 5 is fixed so as to rotate integrally with the rotor 5, and the rotor 5 is rotationally driven in a direction (direction indicated by an arrow in FIGS. 4 to 6) in which the tip of the scraped piece 9 is the front side when viewed in the axial direction.

Based on FIGS. 5 to 9, the scraping piece 9 will be described.
The scraped piece 9 is based on a base end portion 9B fixed to the partition 15, an intermediate portion 9M that is exposed to the introduction chamber 13, and a tip end portion 9T that is fitted (that is, enters) the annular groove 10. It is configured in a rod shape that is provided in a series from the end to the end.

As shown in FIGS. 5, 7, 8 (b), and 9, the base end portion 9 </ b> T of the scraped piece 9 has a substantially rectangular plate shape.
As shown in FIGS. 5, 7, 8 (a) and 8 (b) and FIG. 9, the intermediate portion 9 </ b> M of the scraped piece 9 is configured in a substantially triangular prism shape with a substantially triangular cross-sectional shape. Yes. Then, by providing the scraping piece 9 in the inclined posture as described above, one side surface 9m (hereinafter referred to as a radiation surface) facing the front side in the rotation direction of the rotor 5 among the three side surfaces of the triangular columnar intermediate portion 9M. Is a front-lowering shape inclined toward the front side in the rotational direction of the rotor 5, and is directed radially outward with respect to the radial direction of the rotor 5 (hereinafter, sometimes referred to as “diagonally outward”). It is configured as follows.

  That is, by providing the bar-shaped scraping piece 9 in the inclined posture as described above, the diameter of the rotor 5 is larger than that of the tip end portion 9T in which the intermediate portion 9M exposed to the introduction chamber 13 of the scraping piece 9 is fitted into the annular groove 10. Further, the radiating surface 9m that faces the front side in the rotational direction of the intermediate portion 9M is a front-lowering shape that inclines toward the front side in the rotational direction of the rotor 5, and further, with respect to the radial direction of the rotor 5 It is inclined diagonally outward. Thereby, the preliminary mixture Fp scraped from the annular groove 10 by the tip portion 9T of the scraping piece 9 is radially outward of the rotor 5 in the introduction chamber 13 by the diffusion surface 9m of the intermediate portion 9M of the scraping piece 9. It is guided to flow toward.

As shown in FIGS. 6, 7, 8 (a) and 8 (b), and FIG. 9, the tip end portion 9 </ b> T of the scraped piece 9 has a substantially quadrangular prism shape with a substantially rectangular cross-sectional shape. 5 of the four side surfaces, the outward side surface 9o facing the radially outward side of the rotor 5 is along the inwardly facing inner surface facing the radially inner side of the inner surface of the annular groove 10, and Of the side surfaces, the inwardly facing side surface 9i is formed in an arc shape on the radially inner side of the rotor 5 along the outwardly facing inner surface facing the radially outward side of the inner surface of the annular groove 10.
Of the four side surfaces of the quadrangular columnar tip portion 9T, the scraped surface 9f facing the front side in the rotational direction of the rotor 5 is in a front-falling shape inclined toward the front side in the rotational direction of the rotor 5, and the diameter of the rotor 5 It is configured to face radially outward with respect to the direction (hereinafter sometimes referred to as diagonally outward).
As a result, the preliminary mixture Fp scraped from the annular groove 10 by the tip 9T of the scraping piece 9 is introduced toward the radially outer side of the rotor 5 by the scraping surface 9f of the tip 9T of the scraping piece 9. 13 will be released.
Furthermore, the tip surface 9t of the tip portion 9T of the scraped piece 9 is configured to be parallel to the bottom surface of the annular groove 10 in a state where the tip portion 9T is fitted in the annular groove 10.

The four scraped pieces 9 configured in the shape as described above partition the base end portion 9B in the inclined posture as described above and arranged in the circumferential direction at intervals of 90 degrees at the central angle. It is fixed to the annular flat plate portion 15c of the body 15 to form an inner scraped piece row Li, and on the outer side of the inner scraped piece row Li, the four scraped pieces 9 are inclined as described above. In the form in which the central angles are arranged in the circumferential direction at intervals of 90 degrees, the base end portion 9B is fixed to the annular flat plate portion 15c of the partition body 15, and the outer scraped piece row Lo is configured. Has been.
Further, when the eight scraping pieces 9 are divided into the outer and inner scraping piece rows Lo and Lii and arranged side by side in the circumferential direction in this manner, the base end portion 9B is fixed to the partition 15 at the position where the base end portion 9B is fixed. When the phase in the circumferential direction shifts the base end portion 9B of the inner row Li with respect to the base end portion 9B of the outer row Lo by about 30 degrees in the rotation direction of the rotor 5 at the central angle, the inner scraped piece row The alignment phase of the four scraped pieces 9 of Li is shifted from the alignment phase of the four scraped pieces 9 of the outer scraped piece row Lo.

  As described above, the eight scraped pieces 9 are divided into the outer and inner scraped strip rows Lo and Li and arranged side by side in the circumferential direction, so that FIG. 6, FIG. 7, FIG. As shown in (b), the four scraped pieces 9 constituting the adjacent scraped piece rows Lo and Li are portions on the proximal end side of the scraped pieces 9 in the inner row Li in the axial direction of the rotor 5. (That is, a part on the base end side of the base end portion 9B and the intermediate portion 9M) and a portion on the tip end side of the scraping piece 9 of the outer row Lo corresponding to the scraping piece 9 (that is, the tip end portion 9T). It is arranged in the circumferential direction in an overlapping form.

As shown in FIG. 4, the partition 15 provided with the two rows of scraped pieces Lo and Li as described above is placed on the front surface of the rotor 5 while being spaced apart from the front surface of the rotor 5 by the spacing member 20. The rotor 5 to which the partition body 15 is attached is disposed in the casing 1 with the cylindrical sliding contact portion 15a of the partition body 15 fitted in the return port 17 so as to be slidably rotatable. Is done.
Then, a tapered return chamber 14 having a smaller diameter toward the front wall 2 side of the casing 1 is formed between the bulging front surface of the rotor 5 and the rear surface of the partition body 15, and the return port 17 serves as the partition body 15. It is comprised so that it may communicate with the return chamber 14 through the cylindrical sliding contact part 15a.
An annular introduction chamber 13 communicating with the mixing introduction port 11 is formed between the front wall 2 of the casing 1 and the front surface of the partition 15.

  When the rotor 5 is driven to rotate, the partition body 15 rotates integrally with the rotor 5 in a state where the cylindrical sliding contact portion 15a is in sliding contact with the return port 17, and the rotor 5 and the partition body 15 are rotated. Even in a rotating state, the state where the return port 17 communicates with the return chamber 14 via the cylindrical sliding contact portion 15a of the partition 15 is maintained.

The separation device 70 is configured to separate the dissolved solution by specific gravity in the cylindrical container 71. As shown in FIG. 1, the separation device 70 is completely removed from the paste F supplied from the discharge port 12 of the dispersion device Y through the discharge path 18. The undissolved paste Fr containing the powder P not dissolved in the paste is separated into the circulation path 16 and the paste F in which the powder P is almost completely dissolved is separated into the discharge path 22. The discharge path 18 and the circulation path 16 are each connected to the lower part of the cylindrical container 71, and the discharge path 22 is connected to the upper part of the cylindrical container 71 and the supply destination 80 of the paste F (product).
Although not shown, the separation device 70 is provided with an introduction pipe connected to the discharge path 18 protruding from the bottom surface of the cylindrical container 71 and connected to the discharge path 22 at the upper part of the cylindrical container 71. In addition to having a discharge part, a lower part is provided with a circulation part connected to the circulation path 16, and a twist plate for turning the flow of the solution discharged from the introduction pipe is arranged at the upper discharge end of the introduction pipe. Yes.

Next, the operation of this powder melting system will be described.
First, the quantitative supply device X is stopped, the shutter valve 46 is closed, and the suction of the powder P through the powder discharge pipe 45 is stopped, and the rotor 5 is moved while supplying only the solvent R from the solvent supply device 50. Rotate and start the operation of the dispersion device Y. When a predetermined operation time has elapsed and the inside of the dispersing device Y is in a negative pressure state (for example, a vacuum state of about −0.06 MPa), the shutter valve 46 is opened. As a result, the expansion chamber 47 of the quantitative supply mechanism X is brought into a negative pressure state (about −0.06 MPa), and the inside of the introduction part 41 and the vicinity of the lower opening 31b of the hopper 31 are between the negative pressure state and the atmospheric pressure state. To the pressure state.

Then, the quantitative supply device X is operated, and the powder P stored in the hopper 31 is supplied from the lower opening 31b of the hopper 31 by the stirring action of the stirring blade 32A and the negative pressure suction force of the dispersing device Y. A predetermined amount is continuously supplied in a predetermined amount to the mixing member 61 of the mixing mechanism 60 via the 40 expansion chambers 47. In parallel, the solvent supply mechanism 50 is operated, and the solvent R is continuously supplied in a predetermined amount to the mixing member 61 of the mixing mechanism 60 by the negative pressure suction force of the dispersing device Y.
From the mixing member 61 of the mixing mechanism 60, the powder P is supplied to the mixing inlet 11 through the cylindrical portion 62 of the mixing member 61, and the solvent R passes through the annular slit 63 and has a hollow cylindrical vortex flow without a break. In this state, the powder P and the solvent R are premixed by the mixing inlet 11, and the preliminary mixture Fp is introduced into the two annular grooves 10.

When the rotor 5 is rotationally driven at a high speed and the partition 15 rotates integrally with the rotor 5 at a high speed, the four scraped rows Lo and Li respectively provided in two rows concentrically with the partition 15 are provided. The scraping piece 9 circulates at a high speed in a state in which the distal end portion 9T is fitted in each of the annular grooves 10 corresponding to each row.
Then, as indicated by solid line arrows in FIGS. 4 and 5, the preliminary mixture Fp that flows through the mixing inlet 11 and is introduced into the two annular grooves 10 is inserted into the annular groove 10 and raked out. The preliminary mixture Fp scraped out by the tip end portion 9T of the 9 is roughly along the front surface of the funnel-shaped portion 15b and the front surface of the annular flat plate portion 15c in the partition 15 in the introduction chamber 13. While flowing in the rotation direction of the rotor 5, further flows through the introduction chamber side through-hole 7 a of the stator 7 and flows into the blade chamber 8, and flows in the blade chamber 8 in the rotation direction of the rotor 5. 12 is discharged.

The preliminary mixture Fp introduced into the two annular grooves 10 is subjected to a shearing action when it is scraped by the tip portion 9T of the scraping piece 9. In this case, between the outward side surface 9o of the tip 9T of the scraping piece 9 in the inner scraping piece row Li and the inward inner surface of the inner annular groove 10, and the tip of the scraping piece 9 in the inner scraping piece row Li. A shearing action acts between the inward side surface 9i of the portion 9T and the outward inner surface of the inner annular groove 10, and the outward side surface 9o and the outer side of the tip portion 9T of the scraped piece 9 in the outer scraped piece row Lo. A shearing action acts between the inner surface of the annular groove 10 and between the inner surface 9i of the tip 9T of the scraping piece 9 in the outer scraping piece row Lo and the outer surface of the outer annular groove 10. .
That is, since the shearing force can be applied in four different regions in the radial direction of the rotor 5, the preliminary mixture Fp is sufficiently finely crushed and the flow of the preliminary mixture Fp is sufficiently disturbed, so that the powder P Can be uniformly dissolved and mixed in the solvent R.

In addition, since the four scraped pieces 9 are disposed in the circumferential direction at the same position in the radial direction of the rotor 5, the shear force is applied four times at the same position in the radial direction of the rotor 5 during one rotation of the rotor 5. Furthermore, since the arrangement phase in the circumferential direction of the four scraped pieces 9 constituting each row is different between the inner and outer two scraped piece rows Li and Lo, two strips from the mixing inlet 11 A shear force can be applied to the preliminary mixture Fp introduced into the annular groove 10 eight times while the rotor 5 rotates once.
That is, since the pressure pulsation can be generated at a high frequency with respect to the preliminary mixture Fp in the introduction chamber 13, the preliminary mixture Fp is further finely crushed and further turbulence is caused by the flow of the preliminary mixture Fp. be able to.

Furthermore, the scraping surface 9f of the tip 9T of the scraping piece 9 facing the front side in the rotation direction of the rotor 5 and the diffusion surface 9m of the intermediate part 9M of the scraping piece 9 facing the front side of the rotation direction of the rotor 5 are both lowered forward. And obliquely outward.
As a result, the preliminary mixture Fp scraped from the annular groove 10 by the tip 9T of the scraping piece 9 is introduced toward the radially outer side of the rotor 5 by the scraping surface 9f of the tip 9T of the scraping piece 9. The pre-mixture Fp released into the interior 13 flows further toward the radially outer side of the rotor 5 in the introduction chamber 13 by the diffusion surface 9m of the intermediate portion 9M of the scraping piece 9. To be guided. Further, the preliminary mixture Fp passes through the introduction chamber side through-hole 7a, and is crushed by the shearing action when passing through the introduction chamber-side through hole 7a. A paste F in which the powder P is sufficiently dissolved is generated by being crushed by the shearing action, and the paste F is discharged from the discharge port 12.
That is, the preliminary mixture Fp introduced into the introduction chamber 13 from the mixing introduction port 11 can be mixed well while suppressing the stay and can be discharged from the discharge port 12 as the paste F.

  Further, when viewed in the axial direction of the rotor 5, a base end portion 9 </ b> B of each scraped piece 9 in the inner row Li and a distal end portion 9 </ b> T of each scraped piece 9 in the outer row Lo corresponding to each scraped piece 9 are provided. Since it overlaps, the preliminary mixture Fp scraped out by the scraping piece 9 of the inner row Li and moved to the radially outer side of the rotor 5 becomes the base end portion 9B of the scraping piece 9 of the inner row Li and the outer side. Since it is pressed between the tip end portions 9T of the scraped pieces 9 in the row Lo and subjected to a compression action, the premixture Fp can be crushed and dissolved and mixed.

  In short, a shear force is applied to the preliminary mixture Fp introduced into the two annular grooves 10 from the mixing introduction port 11 in four different regions in the radial direction of the rotor 5, and the preliminary mixture Fp is introduced into the preliminary mixture Fp in the introduction chamber 13. Since the pressure pulsation can be generated at a high frequency, the premix Fp is finely crushed and dissolved and mixed to produce a paste F with very little lumps, and the paste F is a paste F from the return chamber 14 described later. And discharged from the discharge port 12.

  The paste F discharged from the discharge port 12 is supplied to the separation device 70 through the discharge path 18, and the separation device 70 contains the undissolved paste Fr containing the powder P that is not completely dissolved, and the powder P. The undissolved paste Fr is separated into the substantially completely dissolved paste F, and the undissolved paste Fr is supplied again to the dispersing device Y through the circulation path 16, and the paste F is supplied to the supply destination 80 through the discharge path 22.

The undissolved paste Fr is introduced into the return chamber 14 from the return port 17, and is subjected to a shearing action by a plurality of stirring blades 21 rotating at high speed in the return chamber 14, and is further finely crushed. When passing through the side through holes 7b, the paste F is crushed by being sheared and further crushed by the shearing action by the rotating blades 6 rotating at a high speed, and the amount of lumps is further reduced. The paste F is mixed and discharged from the discharge port 12.
Therefore, it is possible to efficiently generate the paste F in which the powder P is almost dissolved without any lumps and the retention in the dispersing device Y is effectively suppressed.

Next, the results of verifying that the mixing and mixing of the powder P and the solvent R can be promoted by adopting the arrangement according to the present invention as the arrangement of the scraped pieces 9 are shown in FIGS. 12 and FIG.
10 to 12 are simulations of the flow state of the preliminary mixture Fp in the introduction chamber 13, and the rotation in a cross section passing through the vicinity of the opening of the annular groove 10 and perpendicular to the axis A <b> 3 of the casing 1. The relative flow velocity vector of the premix Fp with respect to the rotational velocity vector of the blade 6 is shown. However, in FIGS. 10 to 12, the relative flow velocity vector of the preliminary mixture Fp in the return chamber 14 is also shown.
FIG. 13 is a simulation of the pressure distribution of the preliminary mixture Fp in the introduction chamber 13, and the introduction chamber 13 in a cross section including the axis A <b> 3 of the casing 1 passes through the approximate center of the opening of the mixture introduction port 11. And the pressure distribution in the return chamber 14 is shown by the color shading. That is, the lighter the color, the lower the pressure.

  In FIG. 10 and FIG. 13A, two rows of scraped strips Li and Lo are formed concentrically, and four scraped strips 9 are arranged at equal intervals in the circumferential direction in each stripped strip row Li and Lo. In addition, an arrangement configuration in which the alignment phases of the scraping pieces 9 are made different between the inner and outer scraping piece rows Li and Lo (hereinafter, may be abbreviated as a two-row different phase arrangement configuration), that is, the arrangement of this embodiment. The simulation result in a form is shown. FIG. 11 and FIG. 13B show an arrangement form in which the arrangement phases of the scraping pieces 9 are the same in the inner and outer scraping piece rows Li and Lo when the two rows of the scraping piece rows L are formed concentrically. (Hereinafter, it may be abbreviated as a two-row in-phase arrangement configuration). 12 and 13C show an arrangement form in which a plurality of scraped pieces 9 are arranged side by side in the circumferential direction in a state (one row) located at the same position in the radial direction of the rotor 5 (hereinafter, one row). In some cases, it is abbreviated as an arrangement form), that is, a simulation result in a conventional arrangement form is shown.

  When attention is paid to the region surrounded by the circles in FIGS. 10 to 12, both the two-row different phase arrangement form and the two-row same-phase arrangement form are directed inward in the radial direction of the rotor 5 compared to the one-row arrangement form. The velocity vector having a large component is increased, and by disposing the scraped pieces 9 in a two-row different phase arrangement form or a two-row same phase arrangement form, the flow state of the preliminary mixture Fp in the introduction chamber 13 is disturbed. You can see that it can be promoted.

When attention is paid to the region surrounded by a circle in FIG. 13, in the vicinity of the opening of the mixing introduction port 11 with respect to the introduction chamber 13, both the two-row different phase arrangement form and the two-row same-phase arrangement form are arranged in the one-row arrangement form. Compared to the distribution, the pressure variation is large, and it can be seen that the pressure pulsation of the preliminary mixture Fp in the introduction chamber 13 can be increased. That is, it can be seen that the pressure in the introduction chamber 13 is lower.
Also, in FIG. 13 (a), the number of occurrences (frequency) of pressure pulsations is larger in the two-row different phase arrangement mode than in the two-row same phase arrangement mode, and is surrounded by a circle. It can be seen that the fluctuation of the pressure in the region is finely generated, so that the disturbance of the flow state of the premix Fp is further promoted.

According to the above verification, as in the present invention, a plurality of scraping pieces 9 are provided with different positions in the radial direction of the rotor 5, and the annular grooves 10 are provided at different positions in the radial direction of the rotor 5. By providing a plurality of concentric shapes corresponding to the scraped pieces 9, the action of crushing the premix Fp and the action of causing disturbance in the flow of the premix Fp can be promoted. It can be seen that the mixing ability with the phase dispersion medium can be improved.
Further, when a plurality of scraping pieces 9 are arranged at equal intervals in the circumferential direction to form each of the scraping piece rows L, the arrangement phase of the scraping pieces 9 in the circumferential direction between the adjacent scraping piece rows L is determined. It is possible to strengthen the action of crushing the premix Fp and the action of causing disturbance in the flow of the premix Fp, so that the difference between the dispersoid and the liquid phase dispersion medium can be increased. It can be seen that the mixing ability can be improved.

[Another embodiment]
(A) When forming a plurality of concentric scraping piece rows L by disposing a plurality of scraping pieces 9 in the circumferential direction at each of different positions in the radial direction of the rotor 5, the arrangement form of the scraping pieces 9 is as follows. The arrangement form illustrated in the above embodiment, that is, the same number of scraped pieces 9 are arranged in the circumferential direction at equal intervals in each row, and the circumferentially arranged phase between the adjacent scraped piece rows L is It is not limited to the form which arranges differently.

(A-1) For example, the number of the scraped piece rows L is not limited to the two rows described in the above embodiment, and may be three or more rows. However, as the number of rows increases, the thickness of each scraped piece 9 along the radial direction of the rotor 5 decreases, and the strength of the scraped piece 9 decreases, so the number of rows of the scraped piece row L is as small as possible. It is preferable to do this.
Further, the number of the plurality of scraping pieces 9 constituting each scraping piece row L is not limited to four as in the above embodiment, and may be two or three, or may be five or more. .

(A-2) The same number of the scraped pieces 9 may be arranged in the circumferential direction at equal intervals in each of the scraped piece rows L, and the arrayed phases in the circumferential direction may be the same between the adjacent scraped piece rows L.

(A-3) A plurality of scraped pieces 9 may be arranged in the circumferential direction at different intervals in each scraped piece row L. In this case, the number of the scraping pieces 9 constituting the scraping piece row L may be the same in each row or may be different.

(B) In the above embodiment, a plurality of scraping pieces 9 are arranged in the circumferential direction at each of the different positions in the radial direction of the rotor 5, but the scraping pieces are at each of the different positions in the radial direction of the rotor 5. One 9 may be provided.
In this case, the plurality of scraped pieces 9 may be arranged along the radial direction of the rotor 5 or may not be arranged.

(C) In the above embodiment, the partition 15 is provided on the front side of the rotor 5 so as to rotate integrally with the rotor 5, and the scraping piece 9 is provided on the partition 15, but is discharged from the discharge port 12. When the powder P can be appropriately dissolved and mixed in the solvent R without circulating a part of the paste F, the separation device 70 is omitted, the partition 15 is omitted, and the scraped piece 9 is removed. You may provide directly in the rotor 5. FIG.

(D) In the above embodiment, a single type of CMC powder is used as the powder P. However, a mixed powder obtained by mixing a plurality of types of powder can be used as the powder P as needed. . Similarly, although a single type of water is used as the solvent R, a mixed liquid obtained by mixing a plurality of types of liquid can be used as the solvent R as necessary.
In the above embodiment, the present invention is applied when the powder P is used as the dispersoid, the solvent R is used as the liquid phase dispersion medium, and the dispersoid is dissolved in the liquid phase dispersion medium. The present invention can also be applied to the case of dispersing without dissolving in a liquid phase dispersion medium.
Further, the dispersoid is not limited to the powder P exemplified in the above embodiment, and may be, for example, a liquid. For example, the present invention can also be applied when oil as a dispersoid is dispersed in water as a liquid phase dispersion medium.

  As described above, it is possible to provide a centrifugal dispersion device that can improve the mixing ability of the dispersoid and the liquid phase dispersion medium by suppressing the occurrence of lumps.

DESCRIPTION OF SYMBOLS 1 Casing 2 Front wall part 3 Rear wall part 4 Outer peripheral wall part 5 Rotor 6 Rotary blade 7 Stator 7a Introduction chamber side through-hole (through-hole)
7b Return chamber side through hole (through hole)
8 blade chamber 9 scraped piece 9B base end 9T tip 10 annular groove 11 mixing inlet (inlet)
12 Discharge port 13 Introduction chamber 14 Return chamber 15 Partition 16 Circulation path 17 Return port F Paste (generated fluid)
Fp Preliminary mixture L Scraped single row P Powder (dispersoid)
R solvent (liquid phase dispersion medium)

Claims (2)

A rotor with a rotor blade on the radially outer side is concentric in a freely rotatable manner inside a casing having a cylindrical outer peripheral wall with both end openings closed by a front wall and a rear wall. A cylindrical stator having a plurality of through holes arranged in the circumferential direction is concentrically fixedly disposed on the front side of the rotor on the front wall side and on the inner side of the rotor blade. And
Between the stator and the outer peripheral wall portion of the casing, an annular blade chamber around which the rotary blade circulates is formed,
An annular groove is formed on the inner surface of the front wall portion, and a scraping piece is integrated with the rotor in a state where the tip portion enters the annular groove on the front side of the rotor facing the front wall portion. Is arranged so that it can circulate,
An inlet for sucking and introducing a premixed mixture of a dispersoid and a liquid phase dispersion medium into the casing by rotation of the rotary blade is provided in the front wall portion in a state communicating with the annular groove,
A centrifugal disperser in which a discharge port for discharging a generated fluid generated by mixing a dispersoid and a liquid phase dispersion medium is provided in the outer peripheral wall portion in a state of communicating with the blade chamber,
A plurality of the scraped pieces are provided with different positions in the radial direction of the rotor,
A plurality of the annular grooves are provided concentrically corresponding to the scraped pieces respectively provided at different positions in the radial direction of the rotor ,
At each of the different positions in the radial direction of the rotor, a plurality of the scraped pieces are arranged in the circumferential direction, and a plurality of concentric scraped piece rows are formed,
The plurality of scraped pieces constituting each of the scraped piece rows are arranged at equal intervals in the circumferential direction and arranged so that the arranged phase in the circumferential direction is different between the scraped piece rows adjacent to each other,
Each scraped piece is formed in a rod shape, and is positioned closer to the front wall portion side toward the distal end side of the rod-shaped scraped piece in the radial direction of the rotor, and in the axial direction view of the rotor, In the inclined posture located on the radially inner side of the rotor toward the distal end side, the base end portion of the bar-like scraped piece is fixed so as to rotate integrally with the rotor,
The rotor is rotationally driven in a direction in which the tip of the scraped piece is the front side in the axial direction view,
A plurality of scraping pieces constituting the adjacent scraping piece rows are formed in the axial direction of the rotor in the direction of the proximal end of the scraping piece in the inner row and the scraping pieces in the outer row corresponding to the scraping piece. A centrifugal disperser arranged in the circumferential direction in a form that overlaps with a tip side portion . A return port for returning a part of the generated fluid discharged from the discharge port to the inside of the casing via a circulation path is provided in the front wall portion,
A partition that partitions the inner peripheral side of the stator into an introduction chamber on the front wall side and a return chamber on the rotor side is provided in a state of rotating integrally with the rotor on the front side of the rotor, and the partition The scraped piece is provided on the front wall side of the
The introduction chamber and the return chamber are configured to communicate with the blade chamber through a plurality of through holes of the stator,
The centrifugal dispersion device according to claim 1 , wherein the introduction port communicates with the introduction chamber, and the return port communicates with the return chamber.