JP6207379B2 - Media dryer - Google Patents

Description

  The present invention relates to a post-treatment of media used in a media agitation type wet pulverizer, and relates to a media dryer for drying washed media.

  The media agitation type wet pulverizer is a pulverizer that performs a pulverization process by stirring a slurry-like processed product together with a medium. When the target particle size of the solid after pulverization is 1 μm or less, the particle size of the media used is often 1 mm or less. As the medium to be used becomes smaller, it becomes more difficult to separate the processed product from the medium. However, Patent Document 1 describes a media agitation type wet pulverizer using a centrifugal separator.

  In a media agitation type wet pulverizer using a centrifugal separator, it is easy to cause a problem of mixing media into a processed product when filling or recovering the media. A pulverization processing system and a pulverization processing method that can solve this problem and reliably fill and collect media are described.

  In addition, it is also important to remove the adhering matter by washing the collected media after the pulverization treatment, and Patent Document 3 describes a media washing machine that can be washed in a short time without damaging the media. ing. The washed media can be stretched flat and allowed to dry naturally. However, since foreign substances are not allowed to be mixed, it is preferable to process the media in an airtight device as much as possible.

  In this drying process, it is preferable to batch-process a certain amount of collected media in a short time. In many cases, the particle size of the media is 1 mm or less, and the initial moisture content is about 20 wt% (wet weight basis weight%). For this reason, the property of the processed material changes greatly from a mud with a lot of moisture to a further dry state. In other words, the drying apparatus must be able to cope with such changes in properties.

  For example, a fluidized bed dryer is mentioned as a dryer with high thermal efficiency. However, although it is excellent when continuously treating the entire fluidized bed as a fluidized state close to a dry state, it is considered extremely difficult to perform batch processing. Moreover, as a muddy process with much moisture, a drying process with strong stirring can be mentioned. However, a medium made of ceramic such as zirconia is not preferable because it is broken by strong stirring. Further, in batch processing, a great deal of labor is often required to clean up after processing preparation and cleaning.

JP 2006-247557 A JP 2009-125682 A JP 2011-115713 A

  An object of the present invention is to provide a media dryer for drying a medium used in a media agitation type wet pulverizer, and in particular, to provide a media dryer for batch-processing a certain amount of media after washing. Another object of the present invention is to provide a media dryer that can be efficiently dried in a short time using a dry gas having a low temperature without damaging the media, and is simple and easy to operate.

  A media dryer according to claim 1 of the present invention is a media dryer for drying a medium used in a media agitation type wet pulverizer in a container, wherein the container has a cylindrical shape and gas is applied to the bottom surface. A gas supply port for introduction is provided, and a peripheral surface of the container is provided with a mesh surface for discharging the gas, and an angle formed by an axis of the container and a horizontal plane is 50 to 80 °. doing.

Moreover, the media dryer which concerns on Claim 2 of this invention is the media dryer of Claim 1, Comprising: The means by which the said gas supply port is provided with two or more by the said bottom face is employ | adopted.
Moreover, the media dryer which concerns on Claim 3 of this invention is a media dryer of Claim 1 or 2, Comprising: The total area of the said gas supply port is 0.1 times or less of the area of the said bottom face. A certain method is adopted.
A media dryer according to claim 4 of the present invention is the media dryer according to any one of claims 1 to 3, wherein the gas supply port uses a sintered metal as a current plate. Adopting means.
A media dryer according to a fifth aspect of the present invention is the media dryer according to any one of the first to fourth aspects, wherein the unit includes a vibration device that vibrates the container. doing.

  The media dryer of the present invention can perform a stable drying process by adopting the above-described means, and can perform a batch process in which properties change remarkably during the process without any problem. Further, the drying process can be efficiently performed in a short time with a drying gas having a low temperature without damaging the medium. Further, the operation is simple and can be performed easily.

The outline | summary of the container in the media dryer of this invention is shown, (a) is a schematic side view, (b) is an AA arrow directional view. It is a schematic side view which shows the outline | summary of the media dryer of this invention. An example of a gas supply port is shown, (a) is the schematic sectional drawing, (b) is a schematic partial sectional drawing which shows an attachment state. The other example of a gas supply port is shown, (a) is the schematic sectional drawing, (b) is a schematic partial sectional view which shows an attachment state. Still another example of the gas supply port is shown, (a) is a schematic cross-sectional view thereof, and (b) is a schematic partial cross-sectional view showing an attached state.

The media dryer of the present invention is for drying the media used in the media stirring type wet pulverizer in a container. The container will be described with reference to FIG.
The container 20 has a cylindrical shape, and the cross-sectional shape thereof can be a polygon or an ellipse in addition to a circle. In the container 20, a frame body 25 is formed between the bottom plate 21 and the upper flange 22, and a peripheral wall including a mesh surface 26 is formed along the outer side or the inner side of the frame body 25. The upper flange 22 can be closed by providing a lid 23.

  A gas supply port 50 is provided in the bottom plate 21 which is the bottom surface of the container 20, and a drying gas can be introduced. Further, at least a part of the peripheral wall is provided with a mesh surface 26 so that the drying gas can be discharged. The container 20 is used in an inclined state, and the angle θ between the axis of the container 20 and the horizontal plane is 50 to 80 °.

  One or a plurality of gas supply ports 50 are provided on the inclined bottom plate 21. And it arrange | positions in the comparatively low position of the baseplate 21, and avoids that the drying gas introduced from the high position is short-circuited and discharged | emitted. Moreover, the contact efficiency of a processed material and drying gas can be improved by using a plurality of gas supply ports 50 and dispersing the gas flow.

  Further, the drying gas is ejected from each gas supply port 50 at a relatively high flow rate so that the gas flow is ensured even for the muddy processed material so that the gas is reliably contacted with the processed material. I have to. For this reason, the total area of the gas supply ports 50 is preferably 0.1 times or less, more preferably 0.05 times or less the area of the bottom plate 21 in the container 20. Further, the average flow velocity at each gas supply port 50 is preferably 2 m or more per second, and more preferably 3 m or more. Here, the area of the gas supply port 50 is an area of a rectifying plate 52 to be described later, and the average flow velocity is also a value calculated by this breaking.

  The angle θ between the axis of the container 20 and the horizontal plane is preferably 50 to 80 °, more preferably 60 to 70 °. By setting such an angle, the flow of the processed material can be promoted from the initial stage of batch processing. And the whole can be made into a fluidized-bed state in a short time. For example, when the axis of the container 20 is vertical (angle θ is 90 °), the flow of the processed material becomes insufficient, and it becomes difficult to uniformly treat the whole.

  As shown in FIG. 2, the media dryer 10 according to the present invention is obtained by attaching the container 20 having the above features to a base 30 and an inclined base 35. As the drying gas, for example, compressed air generated using a small compressor is used. If necessary, the temperature is raised to a predetermined temperature using a heater for heating. Then, the medium is dried by introducing a drying gas having a predetermined temperature into the container 20 at a predetermined flow rate.

  By adopting such a configuration, the media dryer 10 of the present invention can perform a drying process under a constant condition from beginning to end, despite being a batch process in which the properties of the processed product are remarkably changed. That is, a partial dry state can be gradually started even for the first muddy processed material. Further, as the process proceeds, the gas flow path is gradually expanded, and finally the entire processed product can be dried in a fluidized bed state. And it can be made into a completely dry state only by continuing a driving | operation without requiring a manual operation in the middle of a process.

  A specific mode of the gas supply port 50 will be described with reference to FIGS. In any case, the bottom plate 21 of the container 20 is fixed to the upper plate 36 of the inclined table 35. That is, the bottom plate 21 and the upper plate 36 are fixed by bolts. Since the central portion of the upper plate 36 is greatly opened, the inside of the container 20 and the inside of the inclined base 35 are adjacent to each other through the bottom plate 21.

  In the first embodiment shown in FIG. 3, the drying gas is introduced into each of the plurality of gas supply ports 50 through individual gas conduits. The structure of the gas supply port 50 includes a rectifying plate 52 on one side of the short pipe 51 and a connection port 53 of a gas conduit on the other side. In this form, even when the pressure loss in the ejection part differs depending on the attachment position, the flow rate can be reliably set for each gas supply port 50.

  In the second embodiment shown in FIG. 4, a drying gas is introduced into each gas supply port 50 from the inclined table 35 as a sealed container. The gas supply port 50 is a simple one in which the rectifying plate 52 is provided on the short pipe 51. Gases are ejected from the gas supply ports 50 by introducing the drying gas from the connection port 38 of the gas conduit provided on the inclined table 35. In this embodiment, the gas flow rate is somewhat different depending on the attachment position of the ejection part, but it can be used when this can be ignored.

  As the current plate 52, it is simple and reliable to use a sintered metal or a wire mesh. And by making it the structure which gas spouts also from the circumference | surroundings of the baffle plate 52 along the baseplate 21, the drying gas is disperse | distributed from the initial stage, and the contact efficiency of a processed material and drying gas is improved. Can do. In addition, a porous plate can be used as the current plate 52 when the particle size of the medium is relatively large.

  The 3rd form shown in FIG. 5 has shown the example of the gas supply port 50 which does not use the baffle plate 52. FIG. The gas supply port 50 is provided with a bowl-shaped disk 55 on one side of the short tube 51. The disk 55 is made of a material having elasticity such as rubber. Then, by introducing the drying gas, the gas can be ejected from the entire circumference along the surface of the bottom plate 21 while vibrating the disk 55. Accordingly, it is possible to improve the contact efficiency with the drying gas by solving the processed product. Also in this case, as in the case of FIG. 4, it is possible to introduce the drying gas into each gas supply port 50 from the inclined table 35 as a sealed container.

  The mesh surface 26 of the container 20 does not necessarily need to be provided over the entire surface of the peripheral wall. For example, only the lower half can be the mesh surface 26. However, if the entire surface is used, the production is simplified and the drying process can be ensured. As the material of the mesh surface 26, a resin mesh or the like can be used, but a stainless steel wire mesh is optimal. The maximum particle diameter that can be passed through the wire mesh is preferably about 2/3 of the particle diameter of the media to be processed. The inner surface of the container 20 is preferably in a smooth state in order to increase the fluidity of the processed material, and the wire mesh is preferably located inside the frame body 25.

A preferred embodiment of the present invention will be described with reference to FIG.
The media dryer 10 can rotate the container 20 greatly. That is, the lower plate 37 of the tilting table 35 and the substrate 31 of the base 30 are rotatably connected by the hinge 60 so that the container 20 can be reversed. The position of the hinge 60 is the side where the container 20 is inclined. A toggle clamp or the like is provided on the opposite side of the hinge 60 so that it can be easily fixed. After the drying process, the medium can be easily discharged from the container 20 by inverting the container 20. Moreover, cleaning and inspection can be easily performed.

  Further, the media dryer 10 includes a vibration device 70 for vibrating the container 20. As the vibration device 70, a small vibration motor or an air vibrator can be used. The direction of vibration is preferably the axial direction of the container 20. For this reason, a spring 71 is provided between the main body of the base 30 and the substrate 31, and a vibration device 70 is provided below the substrate 31. By vibrating the container 20, it is possible to improve the contact efficiency with the drying gas by solving the processed material.

  The media processed by the media dryer 10 of the present invention is ceramic particles such as zirconia. There is no particular limitation on the particle size range of the processed material, and currently used media of 50 μm to several mm can be dried. In the future, even smaller-diameter media tend to be used, but there is no problem, and even about 15 μm can be processed sufficiently.

10 …… Media dryer 20 …… Container 26 …… Mesh surface 50 …… Gas supply port 52 …… Rectifying plate 70 …… Excitation device

Claims (5)

A media dryer for drying the media used in the media stirring type wet pulverizer in a container,
The container has a cylindrical shape, and includes a gas supply port for introducing gas on the bottom surface,
The peripheral wall of the container is provided with a mesh surface for discharging the gas,
The media dryer characterized in that an angle formed between the axis of the container and a horizontal plane is 50 to 80 °.   The media dryer according to claim 1, wherein a plurality of the gas supply ports are provided on the bottom surface.   The media dryer according to claim 1, wherein a total area of the gas supply ports is 0.1 times or less of an area of the bottom surface.   The media dryer according to any one of claims 1 to 3, wherein the gas supply port uses a sintered metal as a current plate.   The media dryer according to any one of claims 1 to 4, further comprising a vibration device that vibrates the container.