JP2008212808A - Media-stirring type wet pulverizer and crushing treatment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a media-stirring type wet pulverizer which does not cause the deposition of solid matter inside even when particles with high settleablity are crushed. <P>SOLUTION: The media-stirring type wet pulverizer 10 is provided with a tubular crushing vessel 12 of which both ends are closed, a tubular separator 20 to divide the crushing vessel 12 to the inner side chamber 21 and the outer side chamber 22 and a stirring member 30 that is installed in the inner side chamber 21 so that it can be rotated. It is characterized by employing a means that the inner side chamber 21 has a nozzle 17 communicating with the inside and the outside used as a supply port of the material to be treated and the outer side chamber 22 has a plurality of nozzles 18a, 18b communicating with the inside and the outside used as a discharge port or a supply port of the material to be treated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a media agitation type wet pulverizer that continuously pulverizes and disperses, and in particular, a medium suitable for processing a sedimentation slurry, a high-viscosity slurry, or a slurry that is solidified or increased in viscosity by standing. The present invention relates to a stirring type wet pulverizer.

  The media agitation type wet pulverizer is widely used for pulverization treatment and dispersion treatment in the fields of ink, paint, ceramic, metal, inorganic substance, organic substance, magnetic substance, pigment, pharmaceutical and the like. There are many types of media stirring type wet pulverizers. One of them is the pulverizer described in Patent Document 1.

  This media agitation type wet pulverizer is often used in a processing system as shown in FIG. That is, the processing system 140 is a system in which the pulverizer 110, the service tank 141 for the processed material, and the circulation pump 142 are connected by a circulation line 143. The processed material put into the service tank 141 is circulated through the circulation line 143 by the circulation pump 142 and repeatedly subjected to pulverization processing by the pulverizer 110. As a result, the pulverization process proceeds with respect to the entire processed material in the system, and the refinement of the particles gradually proceeds.

  As shown in FIG. 10, the media agitation type wet pulverizer 110 has a cylindrical pulverization vessel 112 closed at both ends, and the inside of the pulverization vessel 112 is divided into two chambers (an inner chamber 121 and an outer chamber 122). A cylindrical separator 120 provided so as to perform the above operation, and a stirring member 130 rotatably provided in the inner chamber 121 of the crushing vessel 112.

  The crushing container 112 includes a cylindrical container body 113 with one end closed, and a disk-shaped lid 116 that closes the other end opening of the container body 113. A nozzle 117 is provided at the center of the lid 116. That is, the inner chamber 121 includes a nozzle 117 that communicates between the inside and the outside, which is the supply port for the processed material. A nozzle 118 is provided in the cylindrical portion of the container body 113. As a result, the outer chamber 122 is provided with a nozzle 118 serving as a discharge port for the processed material. A cylindrical boss 114 that communicates the inside and the outside of the container body 113 is provided at the central portion of the closed end of the container body 113, and the drive shaft 131 of the stirring member 130 is attached via the seal member 115. Yes.

  The separator 120 is a structural component for separating the media and the processed product. In this structure, a plurality of support shafts 124 are arranged on the same circumference between two base rings 123a and 123b, and a plurality of rings 125 and a plurality of annular spacers 126 are connected via the support shafts 124. Alternatingly arranged. That is, the ring 125 is inscribed in the plurality of support shafts 124, and the annular spacer 126 is inserted through and attached to the support shaft 124.

Such a type of separator 120 has the advantages that separation is reliable and the shape is simple and easy to use. Further, since the thickness in the flow direction can be reduced, there is an advantage that clogging hardly occurs and pressure loss can be suppressed low.
However, since the ring 125 is provided in contact with the plurality of support shafts 124, the distance from the outside of the ring 125 to the inner wall of the cylindrical portion of the container main body 113 increases, and the outer chamber 122 is formed larger than necessary.

  For this reason, when pulverizing particles with high sedimentation properties, there is a problem that solid matter is accumulated. For example, the inner wall of the cylindrical portion of the container body 113 is likely to accumulate in the lower part thereof. In addition, in the outer peripheral portion of the ring 125, it is easy to cause stagnating at the upper portion or around the support shaft 124. As a result, there is a problem that the coarse particles that have settled float up in the middle of the process and are mixed into the final product.

In addition, in the case of a high-viscosity processed product or a processed product that solidifies or becomes highly viscous by standing, the deposits remaining in the machine at the end of the processing increase each time the processing is repeated, There is a problem that it eventually leads to blockage. In order to prevent this, a cleaning operation is performed at the end of the process. However, it is difficult to perform sufficient cleaning, and there is also a problem that the previous processed product is mixed when the product is changed. Further, when the stirring member includes a plurality of rotors, the outer chamber becomes larger, and these problems become more remarkable.
JP 2005-125192 A

  Accordingly, an object of the present invention is to provide a media agitation type wet pulverizer which does not cause solid accumulation inside even when particles having high sedimentation properties are pulverized. Another object of the present invention is to provide a media agitation type wet pulverizer that does not increase sedimentation even in the case of a high-viscosity processed product or a processed product that solidifies or becomes highly viscous by standing. . Another object of the present invention is to provide a media agitation type wet pulverizer capable of sufficiently washing the inside. Furthermore, it is providing the suitable grinding | pulverization processing method with respect to these processed materials.

  In order to solve the above-mentioned problems, a media agitation type wet pulverizer according to claim 1 of the present invention includes a cylindrical pulverization container closed at both ends, and the pulverization container is divided into an inner chamber and an outer chamber. A media agitation type wet pulverizer comprising a partitioning cylindrical separator and a stirring member rotatably provided in the inner chamber, wherein the inner chamber has a nozzle communicating with the inside and outside serving as a supply port for a processed material. Provided, and the outer chamber employs means having a plurality of nozzles communicating with the inside and the outside serving as discharge ports or supply ports for the processed material.

  The media agitation type wet pulverizer according to claim 2 of the present invention is the media agitation type wet pulverizer according to claim 1, wherein the outer chamber is provided with a plurality of outlets. Yes. Further, the media agitation type wet pulverizer according to claim 3 of the present invention employs a means in which the agitation member includes a plurality of rotors in the media agitation type wet pulverizer according to claim 1 or 2. ing. A media agitation type wet pulverizer according to claim 4 of the present invention employs a means in which the agitation member can be reversed in the media agitation type wet pulverizer according to any one of claims 1 to 3. ing.

  In addition, the media agitation type wet pulverizer according to claim 5 of the present invention is the media agitation type wet pulverizer according to any one of claims 1 to 4, wherein the outer chamber forces the processed material in the outer chamber. In order to circulate, a means having an internal circulation line with an internal circulation pump is adopted.

  Further, the media agitation type wet pulverizer according to claim 6 of the present invention is the media agitation type wet pulverizer according to claim 5, wherein the nozzles serving as the supply port and the discharge port for the internal circulation line are Means that are tangentially attached to the outer chamber are employed. Further, the media agitation type wet pulverizer according to claim 7 of the present invention is the media agitation type wet pulverizer according to claim 5 or 6, wherein the internal circulation line is configured to wash the outer chamber. Means having an inlet and an outlet. In addition, the media agitation type wet pulverizer according to claim 8 of the present invention is the media agitation type wet pulverizer according to any one of claims 5 to 7, wherein the internal circulation line cools the processed product. Adopting means equipped with heat exchanger. A pulverizing method according to claim 9 of the present invention employs a means in which the pulverizer according to any one of claims 1 to 8, a service tank for processed material, and a circulation pump are connected by a circulation line.

  The media agitation type wet pulverizer of the present invention has the above-described configuration, so that a processed product containing particles having a high sedimentation property, a high-viscosity processed product, and a processed product that solidifies or becomes highly viscous by standing. But it can be processed without problems. That is, it is possible to process without causing solid matter to accumulate, and it is possible to sufficiently clean the interior after the processing.

  The slurry having a high sedimentation property is a slurry having a large particle diameter or a slurry having a high specific gravity. In addition, the high-viscosity processed materials are, for example, paints, inks, paints, refined calcium carbonate, ceramic powder, etc., but generally the viscosity is often increased by increasing the concentration or miniaturization. It is effective in such cases. In addition, those that solidify upon standing correspond to processed products with strong thixotropy such as plasma calcium carbonate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, two examples of the basic structure of the media stirring type wet pulverizer of the present invention are shown in FIGS. The crusher 10 is provided in a cylindrical crushing container 12 whose both ends are closed, a cylindrical separator 20 that divides the crushing container 12 into an inner chamber 21 and an outer chamber 22, and a rotatable inside the inner chamber 21. And a stirring member 30.

  The pulverization container 12 includes a cylindrical container body 13 whose one end is closed and a disc-shaped lid 16 which closes the other end opening of the container body 13. A nozzle 17 is provided at the center of the lid 16. One nozzle 17 may be used. That is, the inner chamber 21 includes the nozzle 17 that communicates between the inside and the outside, which is the supply port for the processed material. In addition, two nozzles 18 a and 18 b are provided in the cylindrical portion of the container body 13. As a result, the outer chamber 22 is provided with a plurality of nozzles 18a and 18b that serve as discharge ports or supply ports for the processed material.

  And the cylindrical boss | hub 14 which connects the inside and outside of the container main body 13 is provided in the center part of the closed one end of the container main body 13, and the drive shaft 31 of the stirring member 30 is mounted | worn through the seal member 15. Yes. In the separator 20 that separates the media and the processed material, a plurality of support shafts 24 are arranged on the same circumference between the two base rings 23a and 23b. The ring 25 and the plurality of annular spacers 26 are alternately arranged. In other words, the ring 25 is provided in contact with the plurality of support shafts 24, and the annular spacer 26 is inserted through the support shaft 24 and attached thereto.

  The pulverizer 50 is provided in a cylindrical pulverization container 52 whose both ends are closed, a cylindrical separator 60 that divides the pulverization container 52 into an inner chamber 61 and an outer chamber 62, and a rotation in the inner chamber 61. And a stirring member 70. And the stirring member 70 differs from the grinder 10 by the point provided with the two rotors 72a and 72b.

  The crushing container 52 includes a cylindrical container body 53 with one end closed and a disk-shaped lid 56 that closes the other end opening of the container body 53. A nozzle 57 is provided at the center of the lid 56. One nozzle 57 may be provided. That is, the inner chamber 61 is provided with a nozzle 57 that communicates with the inside and outside, which serves as the supply port for the processed material. In addition, four nozzles 58a, 58b, 58c, and 58d are provided on the cylindrical portion of the container body 53. As a result, the outer chamber 62 includes a plurality of nozzles 58a, 58b, 58c, and 58d that serve as discharge ports or supply ports for the processed material.

  A cylindrical boss 54 that communicates the inside and the outside of the container main body 53 is provided at the central portion of the closed end of the container main body 53, and the drive shaft 71 of the stirring member 70 is attached via the seal member 55. Note that the separator 60 that separates the media and the processed material is configured in substantially the same manner as in the case of the pulverizer 10, and thus the description thereof is omitted.

  A feature of the media stirring type wet pulverizer of the present invention is that the outer chamber includes a plurality of nozzles. The plurality of nozzles may be used as discharge ports or may be used as supply ports, which will be described together with the processing system.

  In FIG. 3, the processing system 40 using the above-mentioned grinder 10 is shown. The outer chamber 22 includes two nozzles 18a and 18b, which are used as discharge ports. That is, the processing system 40 is a system in which the pulverizer 10, the processed product service tank 41 and the circulation pump 42 are connected by a circulation line 43. By providing the upper nozzle 18a, it is easy to degas the machine at start-up. In addition, by providing the lower nozzle 18b, it is possible to prevent the accumulation at the lower portion of the inner wall of the cylindrical portion of the container body 13 even when the particles having high sedimentation properties are pulverized.

  FIG. 4 shows a processing system 40a using a pulverizer 10a (the other is the same as the pulverizer 10) in which the outer chamber 22 is provided with four nozzles 18a, 18b, 18c, and 18d vertically and horizontally. The four nozzles 18a, 18b, 18c, and 18d are all used as discharge ports. This processing system 40 a is configured by connecting a crusher 10 a, a processed product service tank 41, and a circulation pump 42 with a circulation line 43.

  In this case, a valve is attached to each discharge port, and one nozzle is opened and discharged sequentially during operation, so that the accumulation can be prevented more reliably than in the case of the processing system 40 (FIG. 3). It can be performed. Further, the accumulation in the periphery of the support shaft 24 is affected by the rotation direction of the stirring member 30. Therefore, in these processing systems 40 and 40a, it is preferable to periodically perform the reverse operation so that the stirring member 30 can be reversely rotated.

  FIG. 5 shows a processing system 40b using a pulverizer 10b that can forcibly circulate the processed material in the outer chamber 22. The outer chamber 22 of the pulverizer 10b has an internal circulation line 83 provided with an internal circulation pump 82 (others are the same as those of the pulverizer 10). This processing system 40 b is configured by connecting a crusher 10 b with a service tank 41 of a processed product and a circulation pump 42 through a circulation line 43. The outer chamber 22 includes two nozzles 18a and 18b, the nozzle 18a serves as a discharge port for the processed material, and the nozzle 18b serves as a supply port for the processed material.

  Since the processed product in the outer chamber 22 is forcibly agitated by the internal circulation line 83, the inner wall of the cylindrical portion of the container body 13 and the outer peripheral portion of the ring 25 even when the particles having high sedimentation properties are pulverized. Can be prevented. In addition, with respect to the processed product that is solidified or increased in viscosity by standing, the inside of the outer chamber 22 is always kept in a fluid state by the internal circulation line 83 to prevent the resting state and prevent accumulation. be able to.

  FIG. 6 shows a processing system 40c similar to the processing system 40b. The crusher 10 c used here is different from the crusher 10 b only in that the two nozzles 18 a and 18 b are attached to the outer chamber 22 in a tangential direction. Therefore, the processed material flowing into the outer chamber 22 from the nozzle 18b serving as the supply port flows so as to circulate in a certain direction in the annular outer chamber 22, and is discharged along the flow from the nozzle 18a serving as the discharge port. It will be.

  That is, the nozzles 18 a and 18 b to which the internal circulation line 83 is connected are preferably attached tangentially to the outer chamber 22 along the direction of the circulation flow in the outer chamber 22. As a result, the processed material in the outer chamber 22 is agitated more intensely than in the case of the processing system 40b, and further prevention of accumulation at the inner wall of the cylindrical portion of the container body 13 and the outer peripheral portion of the ring 25 is further achieved. Can be sure.

  FIG. 7 shows a processing system 80a using the pulverizer 50a. The pulverizer 50a includes the basic structure of the pulverizer 50, and the stirring member 70 includes two rotors 72a and 72b. Further, the pulverizer 50 a includes an internal circulation pump 82 and an internal circulation line 83 for forcibly circulating the processed material in the outer chamber 62. Further, in order to clean the inside of the outer chamber 62, the internal circulation line 83 includes a cleaning liquid inlet 84 and an outlet 85.

  Here, the outer chamber 62 includes four nozzles 58a, 58b, 58c, and 58d. Of these, the nozzle 58d is a supply port for the processed material, and the other is a discharge port for the processed material. The nozzles 58 c and 58 d to which the internal circulation line 83 is connected are preferably attached to the outer chamber 62 in a tangential direction so as to cause a circulation flow in the outer chamber 62.

  Since the processed material in the outer chamber 62 is forcibly stirred by the internal circulation line 83, the inner wall of the cylindrical portion of the container body 53 and the outer peripheral portion of the ring 25 even when the particles having high sedimentation properties are pulverized. Can be prevented. In addition, with respect to a processed product that is solidified or increased in viscosity by standing, the inside of the outer chamber 62 is always kept in a fluid state by the internal circulation line 83 to prevent the standing state and prevent accumulation. be able to.

  Further, since the internal circulation line 83 includes the inlet 84 and the outlet 85 for the cleaning liquid, the cleaning operation can be performed. The cleaning operation is an operation performed by flowing a cleaning liquid such as water from the inlet 84 after the actual operation is completed, and the inside of the pulverizer 50a can be cleaned to remove the processing matter accumulated in the outer chamber. The cleaning waste liquid is appropriately discharged from the outlet 85.

  FIG. 8 shows a processing system 80b similar to the processing system 80a. The crusher 50b used here is substantially the same as the crusher 50a, but is changed so that the connection of the nozzles 58b and 58d of the outer chamber 62 is reversed. The processing performance varies depending on the processed material, but the pulverizer 50b often has higher performance. Further, as in the case of the pulverizers 10 and 10a, it is preferable that the pulverizers 50a and 50b are periodically rotated in reverse so that the stirring member 70 can be reversely rotated.

  The pulverizer 50b includes a heat exchanger 86 for the internal circulation line 83 to cool the processed material. As a result, it is possible to prevent an increase in the temperature of the processed material in the system and maintain a constant temperature in the system to perform stable processing. The heat exchanger 86 is preferably one that can also be used as a heater at the start of operation.

  Moreover, from FIG. 11, when the length between the inner both ends of the crushing container is L and the inner diameter of the cylindrical separator is D, these are the length L and the diameter D between both ends of the cylindrical inner chamber. . When the number of stirring members is N, the ratio of the length L to the diameter D is preferably in the range of 0.3N <L / D <0.75N. By making L / D smaller than 0.75N, even when a medium having a small diameter is used, the fluidity of the processed material is improved. Moreover, by making it larger than 0.3 N, the working range of the stirring member can be sufficiently ensured.

  The relationship between the stirring member and the inner chamber is preferably such that 0.70 <d / D <0.97 between the outer diameter d of the stirring member and the diameter D of the inner chamber. By setting it as this range, the fluidity | liquidity of a processed material becomes favorable. Moreover, it is preferable that the width w of the stirring member has a relationship of 0.7L <wN <0.9L between the length L of the inner chamber and the number N of the stirring members. By setting it as this range, the fluidity | liquidity of a processed material becomes favorable.

  The amount of media filled in the inner chamber is desirably adjusted as appropriate according to the physical properties of the processed product. If the media filling amount is inappropriate, media segregation and group motion occur.

It is a schematic sectional drawing which shows an example 10 of the basic structure in the media stirring type wet crusher of this invention. It is a schematic sectional drawing which shows the other example 50 of the basic structure in the media stirring type wet crusher of this invention. It is a schematic explanatory drawing which shows the example 40 of the media stirring type wet-pulverization machine 10 and processing system of this invention. It is a schematic explanatory drawing which shows the media stirring type wet-grinding machine 10a and the processing system 40a of this invention. It is a schematic explanatory drawing which shows the media stirring type wet-grinding machine 10b and the processing system 40b of this invention. It is a schematic explanatory drawing which shows the media stirring type wet-grinding machine 10c and the processing system 40c of this invention. It is a schematic explanatory drawing which shows the media stirring type wet-grinding machine 50a and the processing system 80a of this invention. It is a schematic explanatory drawing which shows the media stirring type wet-grinding machine 50b and the processing system 80b of this invention. It is a schematic explanatory drawing which shows the conventional processing system. It is a schematic sectional drawing which shows the conventional grinder. It is a schematic explanatory drawing which shows the internal dimension of a grinding | pulverization container.

Explanation of symbols

10, 10a, 10b, 10c, 50, 50a, 50b, 110 Media stirring type wet pulverizer 12, 52, 112 Crushing container 13, 53, 113 Container body 14, 54, 114 Boss 15, 55, 115 Seal member 16, 56, 116 Lid 17, 18a, 18b, 18c, 18d, 57, 58a, 58b, 58c, 58d, 117, 118 Nozzle 20, 60, 120 Separator 21, 61, 121 Inner chamber 22, 62, 122 Outer chamber 23a, 23b, 123a, 123b Base ring 24, 124 Support shaft 25, 125 Ring 26, 126 Annular spacer 30, 70, 130 Stirring member 31, 71, 131 Drive shaft 40, 40a, 40b, 40c, 80a, 80b, 140 Processing system 41, 141 Service tanks 42, 142 Circulation pumps 43, 14 3 Circulation lines 72a, 72b Rotor 82 Internal circulation pump 83 Internal circulation line 84 Inlet 85 Outlet 86 Heat exchanger

Claims (9)

A cylindrical crushing container closed at both ends;
A cylindrical separator that divides the pulverization container into an inner chamber and an outer chamber;
A media stirring type wet pulverizer provided with a stirring member rotatably provided in the inner chamber,
The inner chamber includes a nozzle that communicates between the inside and the outside serving as a supply port for the processed material,
The crusher characterized in that the outer chamber is provided with a plurality of nozzles that communicate with the inside and outside, which serve as discharge ports or supply ports for processed materials.   The crusher according to claim 1, wherein the outer chamber includes a plurality of discharge ports.   The pulverizer according to claim 1, wherein the stirring member includes a plurality of rotors.   The pulverizer according to any one of claims 1 to 3, wherein the stirring member is reversible.   The pulverizer according to any one of claims 1 to 4, wherein the outer chamber has an internal circulation line including an internal circulation pump in order to forcibly circulate the processed material in the outer chamber. .   The pulverizer according to claim 5, wherein the nozzle serving as a supply port and a discharge port for the internal circulation line is attached in a tangential direction to the outer chamber.   The pulverizer according to claim 5 or 6, wherein the internal circulation line includes an inlet and an outlet of a cleaning liquid for cleaning the outer chamber.   The pulverizer according to any one of claims 5 to 7, wherein the internal circulation line includes a heat exchanger for cooling the processed material.   9. A pulverization method comprising the pulverizer according to claim 1, a service tank for a processed product, and a circulation pump connected by a circulation line.

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