JP2005279350A - Circulation washing device and circulation line system provided with the circulation washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulation washing device capable of reducing the using amount of washing liquid for washing an agitation device and a circulation distribution system capable of reducing labor for washing in the circulation distribution system in which the circulation washing device, the agitation device and a distribution device are connected by piping for circulation. <P>SOLUTION: The washing liquid is jetted from a washing liquid tank 13 through a washing liquid nozzle 17 to the inside of the tub of the agitation device 1 and an agitation blade 4 by a first pump 14, the washing liquid at the bottom of the agitation tub 6 is returned through the piping 15 for circulation washing to the washing liquid tank 13 by a second pump 16, and the circulation washing is performed. By the changeover of a direction switching valve 20 and the drive of the second pump 16, the washing liquid is circulated to the distribution device 4, piping 3 for distribution circulation and the agitation device 1 and washing is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a circulation cleaning device for automatically washing a stirrer used for manufacturing a pigment paste blended in paints, inks and the like, and a circulation line system combining the circulation washing device and a circulation dispersion line.

  Conventionally, coloring liquids such as paints and inks are generally used in which a pigment paste is blended with a clear varnish. In general, a pigment paste is blended with raw materials such as pigment, varnish, organic solvent, etc., mixed in a stirrer to form a mill base, and the mill base is passed through a continuous dispersing device such as a bead mill dispersing device several times to disperse the pigment. It is manufactured through a process.

  Specifically, the untreated pigment paste stored in the supply tank is supplied to the dispersing device, and the pigment paste obtained by dispersing in the dispersing device is temporarily stored in the receiving tank, and the first pigment dispersion treatment is completed. Later, on the contrary, the pigment paste stored in the receiving tank is returned to the dispersing apparatus and dispersed, the pigment paste subjected to the second pigment dispersion treatment is returned to the original supply tank and stored, and these processes are repeated a plurality of times. Thus, a process of dispersing the pigment is generally employed.

  In addition, a technique is known in which a stirrer and a dispersing device are connected by a circulation line, and a pigment paste is circulated between the two devices so that a supply layer and a receiving tank are combined (for example, Patent Documents 1 and 2). reference).

In the process of producing colored liquids such as paints, it is often a low-volume production of many varieties, and it is necessary to wash the part where the stirrer tank or other pigment paste comes into contact with each color change. A cleaning device that jets cleaning liquid from a cleaning nozzle connected to a cleaning liquid tank to a stirring tank is known (see, for example, Patent Document 1). In this cleaning device, the cleaning liquid in the cleaning liquid tank is sprayed from a cleaning nozzle in a shower shape, and the pigment paste adhered to the inner wall of the stirring tank and the surface of the stirring blade is washed away. The cleaning liquid sprayed from the cleaning liquid nozzle into the stirring tank is immediately extracted from the bottom of the stirring tank, collected, and recycled.
Japanese Patent No. 3189047 JP 2002-306940 A

  However, a conventional cleaning apparatus requires a large amount of cleaning liquid before sufficient cleaning is obtained.

  In addition, if the stirrer and the dispersing device are connected by piping, the piping will be washed when discoloring, etc., so that no cleaning liquid or the like will remain in the piping. Is required, and a great deal of labor is required, which significantly increases the production cost.

  Accordingly, a first object of the present invention is to provide a circulating cleaning apparatus capable of reducing the amount of cleaning liquid used.

  A second object of the present invention is to provide a circulation line system capable of reducing the amount of cleaning liquid used and reducing the labor for cleaning in a system in which a stirrer and a dispersing device are connected by piping. There is.

  In order to achieve the above object, a circulating cleaning apparatus according to the present invention is a circulating cleaning apparatus attached to a stirring apparatus for stirring a pigment paste, and includes a cleaning liquid tank for storing a cleaning liquid, and a cleaning liquid tank in the cleaning liquid tank. A first pump for sucking liquid and supplying the liquid into the stirring tank; a suction port is connected to an outlet provided at the bottom of the stirring tank; and a discharge port is supplied to the cleaning liquid tank by a circulation cleaning pipe And a second pump connected to the mouth.

  The circulating cleaning apparatus further includes a waste liquid tank that receives the cleaning waste liquid, and a first direction switching valve that switches the discharged liquid from the second pump to the waste liquid tank is provided in the circulating cleaning pipe. It is preferable to be provided.

  In order to achieve the above object, the circulating dispersion system according to the present invention includes the circulating cleaning device according to the present invention, the stirring device having a stirring blade and a stirring tank, and an aggregate of pigments composed of secondary particles. And a dispersion device for dispersing in the pigment paste as primary particles, and a second directional control valve for switching to supply the discharged liquid from the second pump to the dispersion device. It is provided in the middle of the pipe, and the discharge port of the dispersing device and the supply port of the stirring tank are connected by a circulation and distribution pipe.

  The circulation and dispersion system includes a product tank that receives the pigment paste that has been subjected to the dispersion treatment, and switches the discharge liquid from the second pump to be discharged to the product tank in the middle of the circulation and dispersion pipe. It is preferable to provide a direction switching valve.

  The dispersing device forms an annular gap for dispersion between a bezel having a supply port for supplying the pigment paste to be dispersed and an outlet for discharging the dispersed pigment paste, and the inner wall of the becel. An annular bead mill having an outer peripheral surface disposed in the vessel and having a cylindrical rotor, and a flow path is formed from the annular gap to the exhaust port through the interior of the rotor. A centrifuge for centrifuging the dispersion medium from the pigment paste is provided in the middle of the flow path, and a circulation opening for sending the centrifuged dispersion medium to the annular gap is formed in the rotor. Is preferred.

  The centrifugal separator preferably includes a rotating body that performs centrifugal separation of the dispersion medium, and the rotating body is preferably an impeller or a rotating disk.

  It is preferable that the rotational drive shaft of the rotor is a hollow shaft, and a discharge opening that communicates with the discharge port is formed in the hollow shaft.

  A supply port of the vessel is disposed on one end side of the vessel, further comprising a substantially cylindrical stator disposed on the other end side of the vessel and on the inner side of the rotor, and the stator and the rotor It is preferable that a gap constituting a part of the flow path is formed between them.

  A rotary drive shaft of the rotor is inserted into the hollow shaft of the rotor, and a flow path reaching the discharge opening is formed between the hollow shaft inner peripheral wall of the rotor and the rotary drive shaft of the rotor. It is preferable that a gap is formed.

  It is preferable that the rotational drive shaft of the rotor and the rotational drive shaft of the rotating body are arranged concentrically.

  A preferred embodiment of the circulating cleaning apparatus according to the present invention will be described below with reference to FIGS. 1 to 3, in the present embodiment, the stirring device 1, the circulating cleaning device 2 connected to the stirring device 1 by a circulation cleaning pipe, and the stirring device 1 and the circulation dispersion pipe 3 are connected. An example of the circulation / distribution system 5 including the dispersion device 4 will be described.

  The stirring device 1 includes a stirring tank 6, a rotating shaft 7 that is suspended from the center of the stirring tank 6, and a stirring blade 8 that is attached to the rotating shaft 7.

  The agitation tank 6 includes cleaning liquid supply ports 9 and 9 and a processing liquid supply port 10 at the top, a processing liquid outlet 11 at the bottom, a cylindrical side surface, and a bottom shape at the bottom. It has a narrow truncated cone shape. The capacity of the stirring tank 6 is not particularly limited, but is generally in the range of about 2 liters to about 10,000 liters.

  The agitating blade 8 includes a bottom flat paddle blade portion 8a extending laterally from the bottom portion of the rotating shaft 7, and a rectangular upper flat paddle blade portion 8b extending upward from the upper portions on both sides of the bottom flat paddle blade portion 8a. have. The bottom flat paddle blade portion 8 a is formed by an inclined side whose bottom shape is parallel to the bottom conical surface of the agitation tank 6, and has a predetermined gap with the bottom surface of the agitation tank 6. The upper flat paddle wing portion 8 b is disposed symmetrically with respect to the rotation shaft 7. The rotating shaft 7 is rotationally driven by a driving device 12 arranged outside the tank, and the rotating shaft 7 is rotationally driven, so that the stirring blade 8 is in the circumferential direction around the cylindrical inner peripheral wall surface of the stirring tank 6. Pass while rotating.

  The circulation cleaning device 2 includes a cleaning liquid tank 13 for storing a cleaning liquid such as a solvent and water, a first pump 14 for sucking the cleaning liquid in the cleaning liquid tank 13 and supplying the suctioned liquid to the cleaning liquid supply ports 9 and 9 of the agitation tank 6. A second pump 16 having a suction port connected to the processing liquid outlet 11 provided at the bottom of the stirring tank 6 and a discharge port connected to the cleaning liquid supply port 13a of the cleaning liquid tank 13 by a circulation cleaning pipe 15; ,have.

  The cleaning liquid supply ports 9 and 9 of the stirring tank 6 are provided with a cleaning nozzle 17, and the cleaning liquid pumped from the first pump is sprayed to the stirring tank 6 and the stirring blade 8 through the cleaning nozzle 17 at a high pressure in the form of a shower. It is like that.

  The cleaning liquid accumulated in the stirring tank 6 is taken out from the processing liquid outlet 11 of the stirring tank 6 by the second pump 16 and returned to the cleaning liquid tank 13 through the circulation cleaning pipe 15.

  The circulation cleaning device 2 further includes a waste liquid tank 18 that receives the cleaning waste liquid, and a first direction switching valve 19 that switches the discharged liquid from the second pump 16 to the waste liquid tank is provided in the circulation cleaning pipe 15. It is provided on the way.

  A second direction switching valve 20 is further provided in the middle of the circulation cleaning pipe 15, and the second direction switching valve 20 supplies the liquid discharged from the second pump 16 to the dispersing device 4. It can be switched. The discharge port of the dispersion device 4 is connected to the treatment liquid supply port 10 of the stirring tank 6 by the circulation and distribution pipe 3.

  A third direction switching valve 21 is provided in the middle of the circulation and distribution pipe, and the third direction switching valve 21 can be switched to discharge the discharged liquid from the second pump 16 to the product tank 22. The product tank 22 receives the pigment paste that has been subjected to the dispersion process.

  The dispersion device 4 is not particularly limited, and a conventionally known pigment dispersion device can be used, but it is preferable to use a bead mill that can take a large treatment flow rate, and in particular, a small-diameter dispersion medium such as the illustrated example. An annular bead mill with a built-in centrifuge that can be used is preferable.

  As shown in the cross-sectional view of FIG. 2, the dispersing device 4 includes a rotor 34 having a cylindrical outer peripheral surface inside a vessel 33 in which a supply port 32 is formed. An annular gap X for dispersing the pigment is formed between the inner wall of the vessel 33 and the outer peripheral wall of the rotor 34.

  The rotation drive shaft 34a of the rotor 34 is a hollow shaft, and a discharge opening 35 is formed in the hollow shaft. A flow path 36 that opens from the hollow portion 34x of the rotation drive shaft 34a through the inside of the rotor 34 to the bottom of the rotor 34 is formed.

  The dispersion medium (not shown) is previously accommodated in the becel 33, and the particle diameter of the dispersion medium can be over 3 mm, which is conventionally used. Things can also be used.

  A centrifuge 37 for centrifuging the dispersion medium flowing through the flow path 36 from the pigment paste is disposed inside the rotor 34. In the illustrated example, the centrifugal separator 37 employs an impeller 38 arranged so as to cross the flow path 36. In order to send out the centrifuged dispersion medium to the annular gap X, a circulation opening 39 that connects the space surrounding the impeller 38 and the annular gap X is formed in the rotor 34.

  The impeller 38 can employ various blades such as a flat blade, an arrow blade, and a twisted blade, and has an action of sucking up at the center of the blade and pushing it in the circumferential direction, that is, an action as a centrifugal pump. The rotational drive shaft 38 a of the impeller 38 is inserted into the hollow portion 34 x of the rotor 34 and protrudes from the rotational drive shaft 34 a of the rotor 34. In the figure, reference numerals 40, 41 and 42 denote seal members.

  As shown in FIG. 3, the impeller 38 includes a donut-shaped plate 50 having a central opening on the top surface of the impeller 38. As shown in FIG. 2, an annular mechanical seal 51 is provided in the gap between the donut-shaped plate 50 and the impeller housing space top wall of the rotor 34 so that the dispersion medium is not discharged through the gap. ing.

  The rotary drive shafts 34a and 38a are connected to a common drive source M via a transmission mechanism 45 in the illustrated example, but the drive sources of the rotary drive shafts 34a and 38a are connected to separate drive sources. Also good. In the illustrated example, the transmission mechanism 45 is a transmission mechanism that includes a combination of pulleys 45a to 45d and pulley belts 45e and 45f wound around the pulleys 45a to 45d. However, other known transmission mechanisms such as a gear transmission mechanism are employed. be able to.

  The flow path 36 communicates from the bottom of the rotor 34 to the center of the impeller 38, that is, the portion that performs the suction action of the impeller 38. The annular clearance X, the flow path 36, and the circulation opening 39 constitute a circulation path that leads from the annular clearance X to the center of the impeller 38 and through the outer periphery of the impeller 38 to the annular clearance X again. .

  The stator 60 can be fixed substantially at the center of the inner bottom portion of the vessel 33, and a flow path is formed by a gap formed between the stator 60 and the rotor 34. The stator 60 is shaped so as to form a flow path in the central portion where the suction action by the rotation of the impeller 38 is the strongest, thereby further enhancing the circulation of the dispersion medium and the pigment paste in the circulation path. The stator 60 gives a speed difference by a gap between the inner side of the rotor 34 and the outer wall of the stator 60, and also plays a role of dispersion similar to the outer periphery of the rotor 34. In the illustrated example, the stator 60 is formed of a cylindrical body having a truncated cone at the top, but various shapes such as a conical shape can be adopted.

  Jackets 61 and 62 are formed on the outer periphery of the vessel 33 and the stator 60, and cooling water is introduced into the jackets 61 and 62 from a water supply port (not shown) and drained from a water discharge port (not shown). The temperature inside is prevented from rising.

The geometric dimensional ratio of the dispersing device 4 is as follows:
The inner height H1 of the vessel 33 is 1.0 to 2.0.
The outer diameter L1 of the stator 60 is 0.5 to 0.7.
The outer diameter L2 of the rotor 34 is 0.95 to 0.98.
The width X1 of the annular gap X is 0.02 to 0.05.
The clearance X2 between the rotor 34 and the stator 60 is 0.02 to 0.05.
The diameter L3 of the flow path 36 at the part communicating with the impeller 38 is 0.1 to 0.3.
The diameter L4 of the impeller 38 is 0.6 to 0.8.
The width H2 of the impeller 38 is 0.2 to 0.3.
An inner diameter L5 of the rotation drive shaft 34a of the rotor 34 is 0.3 to 0.4.
The height H3 of the circulation opening 39 is 0.25 to 0.35.
The width L6 of the circulation opening 39 is 0.05 to 0.1.
It is preferable that it exists in the range.

  Further, the rotational speed of the impeller 38 is preferably in the range of 1.5 to 2.0 times the rotational speed of the rotor 34.

  Although only one stage is shown in the above embodiment, the impeller 38 may be provided in two or more stages, and a stationary guide vane may be provided around the impeller 38 to form a turbine blade. Further, as the centrifugal separator 37, a rotating disk (not shown) may be employed instead of the impeller 38. In the case of a rotating disk, the action as a suction pump is smaller than that of an impeller, but there is a function of applying centrifugal force to the dispersion medium. In addition, the rotating body is not limited to a disk shape, and a rotating body having various shapes such as a sphere, an ellipsoidal sphere, and a cap-shaped body that can centrifuge the dispersion medium by rotating.

  As a centrifugal separator, an impeller can be fixed or integrally formed in the rotor 34, and the rotational drive shaft of the impeller can be omitted. In this case, the rotational speed (rotational speed) of the impeller and the rotational speed of the rotor become the same, and the centrifugal separation action is reduced, but the number of parts can be reduced.

  Further, the rotor 34 can be provided with protrusions such as a plurality of pins on the outer peripheral surface to enhance the stirring effect.

  Furthermore, the rotational drive shaft 38 a of the impeller 38 may extend downward and protrude from the bottom of the bethel 33.

  In the circulation and dispersion system having the above-described configuration, the second directional control valve 20 is switched so as to supply the discharged liquid from the second pump 16 to the dispersion device side, and the pigment mixed and stirred by the stirring device 1 The paste is taken out from the agitation tank 6 through the treatment liquid outlet 11 and supplied to the dispersion device 4 through the circulation and dispersion pipe 3 by driving the second pump 16, and the pigment paste dispersed from the dispersion device 4 is treated with the treatment liquid supply port 10. The mixture is supplied into the stirring tank 6 through the circulation cycle, and the circulation dispersion is performed by repeating this cycle.

  The feed amount by which the second pump 16 pumps the pigment paste to the dispersing device 4 is appropriately controlled within a range that does not greatly exceed the centrifugal separation capacity of the impeller 38 constituting the centrifugal separator.

  The pigment paste pumped to the vessel 33 is agitated by the rotor 34 together with the dispersion medium, and is sent downward through the annular gap X between the inner wall of the vessel 33 and the outer wall of the rotor 34, and passes through the gap between the bottom of the rotor 34 and the bottom of the vessel 33. The clearance between the inner wall of the rotor 34 and the outer wall of the stator 60 is raised. Then, the centrifugal pump action of the impeller 38 disposed inside the rotor 34 sucks the impeller 38 from the center of the rotor 34.

  The mixture of the pigment paste and the dispersion medium sucked into the impeller 38 is subjected to the centrifugal force due to the rotation of the impeller 38 and the rotor 34 outside thereof, and is separated into the dispersion medium and the pigment paste due to the difference in specific gravity. The dispersion medium having a large specific gravity is discharged to the outer periphery, and is returned to the annular gap X between the inner wall of the vessel 33 and the outer wall of the rotor 34 through a plurality of circulation openings 39 formed in the rotor 34. Then, it is mixed with the pigment paste again, and the annular gap X between the inner wall of the becel 33 and the outer wall of the rotor 34 is lowered.

  In this way, the dispersion medium moves from the annular gap X to the flow path 36 inside the rotor by the flow of the pigment paste, and repeats circulation that returns to the original state through the circulation opening 39 by the impeller 38. During this time, the aggregated particles (secondary particles) of the pigment blended in the pigment paste are primary particles due to strong shearing action caused by the collision with the dispersion medium in the annular gap X between the inner wall of the vessel 33 and the outer wall of the rotor 34. To be distributed.

  The pigment paste separated from the dispersion medium by the impeller 38 rises in the gap between the hollow portion 34x of the rotation drive shaft 34a of the rotor 34 and the rotation drive shaft 38a of the impeller 38, and the rotation drive shaft 34a of the rotor 34 It is discharged from the discharge port 33a through the discharge opening 35 formed in the above. The discharged pigment paste is returned to the stirring tank 6 through the circulation / dispersion pipe 3. Circulation dispersion is performed by this repeated circulation.

  After the circulation dispersion is thus completed, the pigment paste is discharged to the product tank 22 through the third direction switching valve 21, and the pigment paste remaining in the stirring tank 6 or the dispersion device 4 is washed. Remove.

  Specifically, after discharging the pigment paste to the product tank 22, the first pump 14 is driven to supply the cleaning liquid from the cleaning liquid tank 13 to the stirring tank 6. At this time, the initial cleaning is performed by spraying the cleaning liquid from the cleaning nozzle 17 in a shower-like manner at a high pressure.

  When a certain amount of the cleaning liquid is accumulated in the stirring tank 6, the first pump 14 is stopped and the second pump 16 is driven to circulate the cleaning liquid in the stirring tank 6, the dispersing device 4, and the circulation and distribution pipe 3. To circulate and clean the circulating and dispersing system. At that time, the cleaning liquid is stored in the stirring tank 6 and the stirring blade 8 and the inner wall of the stirring tank 6 can be cleaned by rotating the stirring blade 8 forward and backward. While the cleaning liquid is circulating through the circulating dispersion system, the dispersion apparatus is also driven, so that the dispersion apparatus can be efficiently cleaned.

  When the cleaning liquid becomes dirty due to the circulation cleaning, and the cleaning liquid does not have the desired cleaning ability, the second direction switching valve 20 and the first direction switching valve 19 are switched to temporarily supply the cleaning liquid to the waste liquid tank 18. Then, the cleaning liquid is newly added to the cleaning liquid tank 13 and the circulating dispersion system can be cleaned again.

  After finishing the circulation and dispersion system, the second direction switching valve 20 is switched so that the discharge from the second pump 16 is sent to the washing liquid tank 13, and the washing liquid is mixed with the stirring tank 6 and the circulation washing pipe 15. The circulating cleaning system is circulated through the circulating cleaning system 13 to circulate the cleaning system. In this case as well, the cleaning liquid can be replaced with a new cleaning liquid before the circulating cleaning system performs the circulating cleaning. After completion of the cleaning of the circulating cleaning system, the first direction switching valve 19 is switched to discharge the cleaning waste liquid to the waste liquid tank 18.

  In the above description, the example in which the circulation cleaning system is subjected to circulation cleaning after the circulation dispersion system is subjected to circulation cleaning has been described. However, the circulation cleaning system may be cleaned first.

  The above-described circulation cleaning process can be automatically performed by sequence control. That is, the first to third direction switching valves 19, 20, and 21 are electromagnetic valves, and the first to third direction switching are performed so that the cleaning process is automatically executed according to a predetermined sequence program. The controller controls the opening and closing of the valves 19 to 21 and the driving and stopping of the first pump 14 and the second pump 16.

  At this time, the liquid level in the cleaning liquid tank 13 and / or the agitation tank 6 is detected by a liquid level sensor (not shown), and the detection signal is also incorporated into the control system, and the first pump 14 and the second pump 16 are incorporated. It is also possible to circulate the cleaning liquid in the circulating cleaning line while controlling the driving / stopping. In this case, the circulation of the cleaning liquid is not continuous but may be intermittent.

  The pigment paste should be treated with a viscosity of 0.01 Pa · sec to 100 Pa · sec, particularly 0.1 Pa · sec to 10 Pa · sec, and a Ti value of 1 to 10, especially 1 to 5. Is preferred. The Ti value is an abbreviation for thixotropic index. The value measured by the rotational viscosity method described in JIS K5101-6-2 (temperature 20 ° C., rotor rotation speed 6 and 60 rpm) is converted into mPa · s. The apparent viscosity at 6 rpm mPa · s / the value calculated by the apparent viscosity at 60 rpm mPa · s.

  Further, when the viscosity of the pigment paste is high or when the TI value is high, the adhesive strength of the pigment paste is strong, so that the inner wall surface of the stirring vessel 6, the surface of the stirring blade 8, and the inner surface of the piping are mirror-finished, fluorine It is desirable to make it smooth by resin coating or glass lining.

1 is a system diagram showing an embodiment of a circulating cleaning apparatus according to the present invention and a circulating and dispersing system including the circulating cleaning apparatus. It is a longitudinal cross-sectional view which shows the dispersion apparatus integrated in the system of FIG. FIG. 3 is a sectional view taken along line AA in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirring apparatus 2 Circulating washing apparatus 3 Circulating dispersion pipe 4 Dispersing apparatus 5 Circulating dispersion system 6 Stirrer tank 13 Cleaning liquid tank 14 First pump 15 Circulating washing pipe 16 Second pump 17 Washing nozzle 19 First direction switching valve 20 Second direction switching valve 21 Third direction switching valve 22 Product tank 32 Supply port 33 Bethel 34 Rotor 36 Flow path 37 Centrifugal device 38 Impeller 39 Circulation opening 60 Stator X Annular gap

Claims (11)

A circulating cleaning device attached to a stirring device for stirring the pigment paste, a cleaning liquid tank for storing a cleaning liquid, and a first pump for sucking the liquid in the cleaning liquid tank and supplying it to the stirring tank And a second pump having a suction port connected to an outlet provided in the bottom of the stirring tank and a discharge port connected to the supply port of the cleaning liquid tank by a circulation cleaning pipe. Circulating cleaning device. A waste liquid tank that receives the cleaning waste liquid is further provided, and a first direction switching valve that switches the discharged liquid from the second pump to the waste liquid tank is provided in the middle of the circulation cleaning pipe. The circulating cleaning apparatus according to claim 1. The circulating cleaning device according to claim 1, the stirring device having a stirring blade and a stirring tank, and a dispersing device for dispersing agglomerates of pigments composed of secondary particles into primary particles in the pigment paste. And a second directional switching valve for switching so that the discharged liquid from the second pump is supplied to the dispersing device is provided in the middle of the circulation cleaning pipe, and the outlet of the dispersing device and the agitation A circulation and dispersion system characterized in that a tank supply port is connected by a circulation and dispersion pipe. A product tank that receives the pigment paste after the dispersion treatment is provided, and a third direction switching valve that switches the discharge liquid from the second pump to the product tank is provided in the middle of the circulation dispersion pipe. The circulation distribution system according to claim 3. The dispersing device forms an annular gap for dispersion between a bezel having a supply port for supplying the pigment paste to be dispersed and an outlet for discharging the dispersed pigment paste, and the inner wall of the becel. An annular type bead mill having an outer peripheral surface disposed in the vessel and a cylindrical rotor,
A flow path is formed from the annular gap through the rotor to the outlet.
A centrifuge for centrifuging the dispersion medium from the pigment paste is provided in the middle of the flow path in the rotor,
5. The circulating / dispersing system according to claim 3, wherein an opening for circulation for feeding the centrifuged dispersion medium to the annular gap is formed in the rotor. The circulatory dispersion system according to claim 5, wherein the centrifugal separator has a rotating body that performs centrifugal separation of the dispersion medium, and the rotating body is an impeller. 6. The circulating dispersion system according to claim 5, wherein the centrifugal separator has a rotating body that performs centrifugal separation of the dispersion medium, and the rotating body is a rotating disk. 6. The circulatory dispersion system according to claim 5, wherein the rotary drive shaft of the rotor is a hollow shaft, and a discharge opening that communicates with the discharge port is formed in the hollow shaft. A supply port of the vessel is disposed on one end side of the vessel, further comprising a substantially cylindrical stator disposed on the other end side of the vessel and on the inner side of the rotor, and the stator and the rotor The circulatory dispersion system according to claim 5, wherein a gap constituting a part of the flow path is formed therebetween. A rotary drive shaft of the rotor is inserted into the hollow shaft of the rotor, and a flow path reaching the discharge opening is formed between the hollow shaft inner peripheral wall of the rotor and the rotary drive shaft of the rotor. 9. A circulating and dispersing system according to claim 8, wherein gaps are formed. The circulation / distribution system according to claim 10, wherein the rotation drive shaft of the rotor and the rotation drive shaft of the rotating body are arranged concentrically.

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