JP2012011291A - Apparatus for manufacturing granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing granule, by which the manufactured granules having high accurate grain size distribution are obtained.SOLUTION: The apparatus for manufacturing granule, in a calcination/sintering device 3 for calcinating and granulating material fed by a mixing and dispersing device 2, includes: a first roller group 51 which is composed of a plurality of first rollers 51A to 51D arranged side by side in parallel with each other in the horizontal direction and has a first gap formed between first rollers adjacent to each other; a second roller group 52 which is located on the vertically lower side of the first roller group 51 and is composed of a plurality of second rollers 52A to 52C arranged side by side in parallel with each other in the horizontal direction and has a second gap formed between second rollers adjacent to each other; motors 5D, 5E which rotate the first rollers and the second rollers respectively; and a temperature controller 56 which controls surface temperatures of the first rollers 51A to 51D and the second rollers 52A to 52C, wherein the mixing and dispersing device 2 ejects the material toward the calcination/sintering device 3 on the upper side of the first roller group 51.

Description

  The present invention relates to a granule manufacturing apparatus, and more particularly to an apparatus for manufacturing a granule of a ceramic material.

  In order to make a ceramic material finer, for example, as shown in Patent Document 1, after a material slurry in which a ceramic material is turbid is adhered to a rod-shaped electrode, the rod-shaped electrode is dried to separate the ceramic material. A technique for granulating is disclosed.

Japanese Unexamined Patent Publication No. 7-17770

  When granulation is performed using the apparatus disclosed in Patent Document 1, the particle size distribution is adjusted to a predetermined value by optimizing process conditions such as heating temperature and heating time. However, adjusting the particle size distribution in this way is performed based on the experimental result that a predetermined particle size distribution is obtained probabilistically if a certain work is performed for a certain time, so when actually granulating Depending on the requirements, the particle size distribution may change, and the variation of the finely divided ceramic material has become large. Therefore, an object of this invention is to provide the granule manufacturing apparatus with the high precision of the particle size distribution of the granule manufactured.

  In order to solve the above-described problems, the present invention includes a material supply mechanism for supplying a material, and a calcination / fine-grain mechanism for calcination and fine granulation of the material supplied by the material supply mechanism. The fine-grain mechanism is composed of a plurality of first rollers arranged parallel to each other in the horizontal direction, a first roller group in which a first gap is formed between adjacent first rollers, and a vertically lower side of the first roller group A second roller group, which is composed of a plurality of second rollers arranged in parallel to each other and arranged in the horizontal direction, with a second gap formed between adjacent second rollers, and a first roller and a second roller. A driving device that rotates around each axis; and a temperature adjusting device that adjusts the surface temperatures of the first roller and the second roller, and the material supply mechanism discharges the material toward the first roller group. Granule production with outlets vertically above the first roller group To provide a location.

  According to such a configuration, by heating while passing the material through the first gap and the second gap, the material having a particle size corresponding to the first gap and the second gap is calcined. Can be processed. That is, since the particle size of the granule can be defined by the interval between the first gap and the second gap, the particle size of the granulated granule can be made uniform with high accuracy. Therefore, by appropriately setting the first gap and the second gap, the particle size distribution of the calcined material particles can be adjusted to a desired value with high accuracy.

  In the granule manufacturing apparatus having the above configuration, it is preferable that the temperature adjusting device adjusts the temperature of the first roller and the second roller separately.

  According to such a configuration, the temperature applied to the material can be set individually for the first roller and the second roller, so that it can be easily calcined with a desired temperature history.

  The first roller group and the second roller group are preferably arranged so that the first roller and the second roller are parallel to each other, and the second roller is positioned vertically below the first gap. .

  According to such a structure, the granular material dripped from the 1st clearance gap of a 1st roller group can be guide | induced to a 2nd clearance gap after contacting a 2nd roller. Therefore, it is suppressed that a granule is dripped directly from a 1st clearance gap to a 2nd clearance gap, and a granule can be refined more suitably.

  A third gap is preferably formed between the first roller and the second roller located below the first gap provided by the first roller.

  According to such a configuration, since the third gap is formed in addition to the first gap and the second gap, the granules can be suitably finely divided by these gaps.

  Further, the drive device can reverse the adjacent first rollers with each other, can reverse the adjacent second rollers with each other, and can periodically change the rotation direction of the first roller and the second roller. It is preferable.

  According to such a structure, it is suppressed that a granule retains in a specific 1st clearance gap and a specific 2nd clearance gap.

  The material supply mechanism may discharge the material as a suspension to the first roller group, and the first roller group may have a blade that scrapes the surface of the first roller.

  According to such a structure, since granulation and calcination can be performed with one roller, it is possible to perform consistent processing.

  According to the granule production apparatus of the present invention, the accuracy of the particle size distribution of the produced granule can be increased.

Schematic of the granule manufacturing apparatus which concerns on embodiment of this invention. The figure which shows arrangement | positioning of the roller of the granule manufacturing apparatus which concerns on embodiment of this invention. The perspective view which shows the 1st roller group periphery of the granule manufacturing apparatus which concerns on embodiment of this invention. The perspective view which shows the 1st roller group periphery which concerns on the example of a change of the granule manufacturing apparatus which concerns on embodiment of this invention.

  Hereinafter, a granule manufacturing apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. A granule manufacturing apparatus 1 shown in FIG. 1 is an apparatus that mainly manufactures ceramic material granules. A mixing and dispersing apparatus 2 that is a material supply mechanism, and a calcination / fine grain mechanism that is a calcination / fine grain mechanism. The apparatus 3 is comprised.

  The mixing / dispersing device 2 is a device that creates a slurry by mixing a ceramic material and a liquid such as water, and includes a buffer tank 21 that stores the created slurry.

  The calcining / fine-grain device 3 is mainly composed of a spray dryer 4 and a roller unit 5. The spray dryer 4 is mainly composed of a spray 41 and a drying chamber 42, and the slurry supplied from the buffer tank 21 is sprayed into the drying chamber 42 by the spray 41. The inside of the drying chamber 42 is kept in a high temperature atmosphere. Therefore, the slurry sprayed from the spray 41 is dried in the drying chamber 42 to become particles of ceramic material. The granules are discharged from the discharge port 42 </ b> A located at the lower end of the drying chamber 42 to the roller unit 5.

  The roller unit 5 mainly includes a first roller group 51, a second roller group 52, a third roller group 53, a fourth roller group 54, and a fifth roller group 55. Each of the first roller group 51 to the fifth roller group 55 includes a plurality of rollers supported by partition walls 5A and 5B (FIG. 3). The plurality of rollers pulverize particles of ceramic material. It is configured to be finely divided.

  The first roller group 51 is mainly composed of four first rollers 51A to 51D each having the same cylindrical shape, and is arranged in a direction depending from the discharge port 42A. The four first rollers 51A to 51D are rotatably supported on the partition walls 5A and 5B, respectively, and spanned between the partition walls 5A and 5B, and are arranged so as to be parallel and horizontal to each other. ing. In the first rollers 51A to 51D, the distance between the adjacent rollers (first gap) is configured to be a distance S1 as shown in FIG. As shown in FIG. 3, the first roller 51A is positioned at both ends of the heating area 51A1 heated by the heater located at the central portion and the heating area 51A1, and the particles are heated from the heating area 51A1 to the first roller 51A. It has seal area | region 51A2, 51A3 which suppresses moving to both ends. The other first rollers 51B to 51D are configured similarly.

  As shown in FIG. 2, the second roller group 52 is mainly composed of three second rollers 52 </ b> A to 52 </ b> C each having the same cylindrical shape, and is positioned vertically below the first roller group 51. Are arranged as follows. One end and the other end of the three second rollers 52A to 52C are rotatably supported by the partition walls 5A and 5B, respectively, and are spanned between the partition walls 5A and 5B (FIG. 3). 51D is parallel and horizontal, and is arranged at equal intervals. More specifically, the second roller 52A is positioned vertically below the gap between the first roller 51A and the first roller 51B, and the second roller 52A is vertically below the gap between the first roller 51B and the first roller 51C. The rollers 52B are located, and the second rollers 52A to 52C are arranged so that the second roller 52C is located vertically below the gap between the first roller 51C and the first roller 51D. The distance between the adjacent rollers of the second rollers 52A to 52C (second gap) is configured to be S2 (S2 <S1). The distance of the gap (third gap) between the first roller group 51 and the second roller group 52 is given by, for example, the distance S3 between the second roller 52C and the first roller 51D. The second roller group 52 is arranged with respect to the first roller group 51 so that the distance S3 satisfies S1> S2> S3. Similarly to the first rollers 51A to 51D, the second rollers 52A to 52C have a heating area and a sealing area.

  The third roller group 53 is positioned vertically below the second roller group 52, is parallel to the first roller 51A and the like, and is horizontally arranged at equal intervals with a gap of a distance S5 between the partition walls 5A and 5B (FIG. 3). Is composed of four cylindrical and identical third rollers 53A to 53D, and the third roller 53B is positioned vertically below the gap between the second roller 52A and the second roller 52B. The third roller 53C is positioned vertically below the gap between the second roller 52B and the second roller 52C. The distance between the third roller group 53 and the second roller group 52 is given by, for example, a distance S4 between the second roller 52C and the third roller 53D. Similarly to the first rollers 51A to 51D, the third rollers 53A to 53D have a heating region and a sealing region.

  The fourth roller group 54 is positioned vertically below the third roller group 53, is parallel to the first roller 51A and the like, and is horizontally arranged at equal intervals with a gap of a distance S7 between the partition walls 5A and 5B (FIG. 3). Are formed of three fourth rollers 54A to 54C having the same shape and the same shape, and the fourth roller 54A is positioned vertically below the gap between the third roller 53A and the third roller 53B. The fourth roller 54B is positioned vertically below the gap between the third roller 53B and the third roller 53C, and the fourth roller 54C is vertically below the gap between the third roller 53C and the third roller 53D. Is located. The distance between the fourth roller group 54 and the third roller group 53 is given by, for example, the distance S6 between the third roller 53D and the fourth roller 54C.

  The fifth roller group 55 is located vertically below the fourth roller group 54, is parallel to the first roller 51A, etc., and is horizontally arranged at equal intervals with a gap of a distance S9, between the partition walls 5A, 5B (FIG. 3). Are formed of four fifth rollers 55A to 55D having the same shape and the same shape, and the fifth roller 55B is positioned vertically below the gap between the fourth roller 54A and the fourth roller 54B. The fifth roller 55C is positioned vertically below the gap between the fourth roller 54B and the fourth roller 54C. The distance between the fifth roller group 55 and the fourth roller group 54 is given by, for example, a distance S8 between the fourth roller 54C and the fifth roller 55D.

  The third roller group 53 to the fifth roller group 55 are configured such that the respective gaps satisfy S3> S4> S5> S6> S7> S8> S9.

  As shown in FIG. 1, in the first roller group 51 to the fifth roller group 55, the first rollers 51A to 51D, the second rollers 52A to 52C constituting the first roller group 51 to the third roller group 53, The third rollers 53A to 53D each have a built-in heater. Each of these heaters is connected to a temperature adjusting device 56, and is energized by the temperature adjusting device 56 to raise the temperature of each roller surface. Further, the temperature adjusting device 56 is configured such that the temperature of the first roller group 51 to the third roller group 53 can be individually controlled.

  The fourth roller group 54 and the fifth roller group 55 are cooling pipes, and are cooled by a refrigerant such as cold air passing through the inside thereof.

  The rollers constituting the first roller group 51 to the fifth roller group 55 are configured to be driven to rotate by motors 5D to 5H, respectively. The motors 5D to 5H are rotated by a driving device 57. It is controlled.

  A discharge port 5 </ b> C is provided below the fifth roller group 55 of the roller unit 5, so that particles that have been finely divided and calcined by the roller unit 5 can be discharged from the discharge port 5 </ b> C.

  In order to granulate the ceramic material in the granule manufacturing apparatus 1 configured as described above, the slurry produced by the mixing and dispersing apparatus 2 is granulated by the spray dryer 4 and then discharged toward the first roller group 51. Since the first rollers 51A to 51D are heated, the particles discharged to the first roller group 51 are calcined on the surfaces of the first rollers 51A to 51D. Further, since the first rollers 51A to 51D are spaced apart from each other with a gap of the distance S1, the particles are dropped toward the second roller group 52 from the gap, but the particles discharged from the spray dryer 4 are dropped. Since the body is not always finely divided, there are particles that cannot pass through the gaps. In contrast, by rotating the first rollers 51 </ b> A to 51 </ b> D, particles that fall into the gap but cannot pass can be pulverized and finely divided and dropped onto the second roller group 52. When the first rollers 51A to 51D are rotated, the motors 5D to 5H are driven by the driving device 57 so as to reverse the adjacent rollers in the first rollers 51A to 51D, and the first rollers 51A to 51D are driven. The rotation direction of 51D is changed periodically. By rotating in this way, the particles remaining in the gaps between the first rollers 51A to 51D can be reduced and suitably pulverized and finely divided.

  Granules that have passed through the gap (first gap) between the first roller group 51 pass through the gap (third gap) between the first roller group 51 and the second roller group 52, and the second roller group. 52 is reached. Also in the third gap, the particles are further pulverized and refined by the rollers of the first roller group 51 and the rollers of the second roller group 52, and then the second rollers 52A to 52C adjacent in the second roller group 52. Is pulverized and refined. In the second roller group 52 to the fifth roller group 55, the particles are similarly pulverized and refined. That is, not only the roller groups are pulverized and finely divided, but also the particles are pulverized and finely divided between one roller group and another roller group located above or below the one roller group. Since it can be granulated, the efficiency of pulverization and fine granulation can be improved.

  As described above, the rollers of the first roller group 51 to the fifth roller group 55 are arranged such that the rollers of the lower roller group are positioned below the gap of the upper roller group, that is, Arranged in a staggered pattern. By arranging in this way, the particles dropped from the gap between the upper roller groups can be guided to the gap between the lower roller groups after contacting the rollers of the lower roller group. Therefore, it is possible to suppress the granules from dropping directly from the gap between the upper roller groups to the gap between the lower roller groups, and it is possible to more finely granulate the granules.

  Moreover, in the 1st roller group 51-the 3rd roller group 53, by heating each roller, a granule is refined and calcined. Since the first roller group 51 to the third roller group 53 can be adjusted in temperature for each roller group, for example, the surface temperature of the roller is lowered as it goes from the first roller group 51 to the third roller group 53. By providing a desired temperature gradient, it is possible to suppress rapid cooling of the fired particles, and to suppress deterioration of the particles due to rapid cooling.

  Granules that have been calcined and finely divided in the first roller group 51 to the third roller group 53 and cooled and finely divided by the fourth roller group 54 and the fifth roller group 55 have a desired particle size from the discharge port 5C. It is discharged in a state of being arranged in a distribution, and then sent to another process.

  According to the granule manufacturing apparatus 1 as described above, by heating the material while passing the material through the gaps between the roller groups, the material having a particle diameter corresponding to the gaps between the roller groups is surely obtained while calcining the material. Can be processed. That is, since the particle size of the granule can be defined by the gap between each roller group, the particle size of the granulated granule can be made uniform with high accuracy. Therefore, by appropriately setting the gaps between the roller groups, the particle size distribution of the calcined particles can be adjusted to a desired value with high accuracy.

  The granule manufacturing apparatus of the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope of the claims. For example, in the embodiment, the slurry is once granulated by the spray dryer 4 and then finely divided by the roller unit 5. However, the present invention is not limited thereto, and the slurry may be directly discharged onto the first roller group 51. Good. Since the first rollers 51A to 51D are each heated to a high temperature by the heater, the slurry can be adhered to the high temperature roller to evaporate the water in the slurry and leave only the ceramic material on the roller. After the ceramic material remaining on the roller is scraped off by a scraping blade 105A as shown in FIG. 4, the first roller group 51 to the fifth roller group 55 are used to reduce the size to a desired particle size distribution. can do. According to such a configuration, granulation and calcination can be performed with a single roller, so that consistent processing can be performed, and the number of components constituting the granule manufacturing apparatus 1 can be reduced.

1. ・ Granule production device 2. ・ Mixing and dispersing device 3. ・ Preliminary firing ・ Fine granulation device 4. ・ Spray dryer 5. ・ Roller part 5A, 5B ・ ・ Partition wall 5C · Spray 42 · · Drying chamber 42A · · Discharge port 51 · · First roller group 51A to 51D · · First roller 52 · · Second roller group 52A to 51C · · Second roller 53 · · Third roller group 53A -53D-Third roller 54-Fourth roller group 54A-54C-Fourth roller 55-Fifth roller group 55A-55D-Fifth roller 56-Temperature controller 57-Driving device

Claims (6)

A material supply mechanism for supplying the material;
A calcination and fine grain mechanism for calcining and granulating the material supplied by the material supply mechanism,
The calcining / fine-grain mechanism includes a first roller group including a plurality of first rollers arranged in parallel and in a horizontal direction and having a first gap formed between the adjacent first rollers, and the first roller group. A second roller group, which is composed of a plurality of second rollers positioned vertically below the one roller group and arranged in parallel with each other and in which a second gap is formed between the adjacent second rollers; and A driving device for rotating the first roller and the second roller around respective axes, and a temperature adjusting device for adjusting the surface temperature of the first roller and the second roller,
The granule manufacturing apparatus according to claim 1, wherein the material supply mechanism has a discharge port for discharging the material toward the first roller group vertically above the first roller group.   The granule manufacturing apparatus according to claim 1, wherein the temperature adjusting device adjusts the temperature of the first roller and the second roller separately.   The first roller group and the second roller group are arranged such that the first roller and the second roller are parallel and the second roller is positioned vertically below the first gap. The granule manufacturing apparatus according to claim 1, wherein the granule manufacturing apparatus is provided.   4. A third gap is formed between the first roller and the second roller located below the first gap provided by the first roller. The granule manufacturing apparatus described in 1.   The driving device is capable of reversing the adjacent first rollers with each other, reversing the adjacent second rollers with each other, and periodically rotating the rotation directions of the first roller and the second roller. It can change, The granule manufacturing apparatus as described in any one of Claims 1-4 characterized by the above-mentioned. The material supply mechanism discharges the material as a suspension to the first roller group,
The granule manufacturing apparatus according to any one of claims 1 to 5, wherein the first roller group includes a blade that scrapes a surface of the first roller.

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