JP6982467B2 - Powder processing equipment - Google Patents

Description

The present invention relates to a powder processing apparatus that pulverizes a lumpy raw material to produce powders and granules having a predetermined particle size.

A conventional pulverizer is disclosed in Patent Document 1. This fine crushing device discharges a liner arranged with a gap between a crushing rotor rotatably provided inside the crushing chamber and an outer peripheral portion of the crushing rotor, and a liner having a predetermined particle size or less. The classification rotor, the circulation passage that guides the raw material that is not discharged by the classification rotor downward, and the raw material that protrudes inward from the inner surface of the crushing chamber and collides with the raw material so that the raw material that is not discharged by the classification rotor swirls along the inner surface of the crushing chamber. It has a restraining vane.

In this fine pulverizer, the input raw material is pulverized by a pulverizing rotor and a liner. Then, the crushed raw material moves upward by the air flow guided to the inside, and centrifugal force is applied by the classification rotor. Raw materials having a particle size smaller than a predetermined particle size, in which the inward force due to the air flow becomes larger than the centrifugal force, are discharged to the outside. The raw material that is not discharged to the outside, that is, the raw material having a particle size larger than the predetermined particle size, flows in the circumferential direction along the crushing chamber, but collides with the vane, falls, and is crushed again by the crushing rotor and the liner. By providing the vane in this way, it is possible to prevent the pulsation of the crushing rotor and stably drive the crushing rotor without dropping a large amount of raw materials on the crushing rotor at once.

Japanese Unexamined Patent Publication No. 2001-259451

However, in the fine pulverizer of Patent Document 1, the airflow generated by the classification rotor also collides with the vane. The airflow that collides with the vane flows vertically. At this time, the airflow flowing downward collides with the airflow flowing toward the classification rotor through the gap between the crushing rotor and the liner, so that the flow velocity of the airflow flowing toward the classification rotor, that is, the energy becomes weak. Therefore, in the fine pulverizer of Patent Document 1, it is necessary to set the flow rate of the airflow flowing toward the classification rotor to be a flow rate capable of flowing upward even if the airflow colliding with the vane is blown. The particle size of the powder or granular material classified by the classification rotor is inversely proportional to the rotation speed of the classification rotor and proportional to the square root of the flow rate of the air flow flowing through the classification rotor. In the fine pulverizer of Reference 1, it is difficult to reduce the flow rate of the air flow flowing through the classification rotor, so that it is difficult to reduce the size of the classified powders to a certain size or less.

Therefore, the present invention has been made to solve the above-mentioned problems, and to provide a powder processing apparatus having a simple structure and capable of reducing the flow rate of the air flow and making the powder or granular material finer. The purpose.

In order to achieve the above object, the powder processing apparatus according to the present invention is arranged under a cylindrical housing extending in the vertical direction, a raw material supply unit for supplying raw materials into the housing, and a raw material supply unit. A first rotating body that rotates around a central axis extending in the vertical direction, a crushing member that is arranged at the radial outer edge of the first rotating body and crushes the raw material into powders, and the first in the housing. 1 A swirling airflow generating part arranged on the upper side of the rotating body to generate an airflow in a swirling direction in the housing, and an airflow inflow arranged on the lower side of the rotating body of the housing to allow the airflow to flow into the housing. A portion and an airflow outflow portion that allows the airflow to flow out from the upper part of the housing are provided. The front side thereof is provided with a guide portion having a guide surface located on the inner side in the radial direction as compared with the rear side.

According to this configuration, the guide surface applies a force inward in the radial direction to the powder or granular material that swirls inside the housing. Therefore, even if the flow rate of the airflow flowing in from the airflow inflow portion is reduced, it is possible to apply a force to push the powder or granular material inward in the radial direction. As a result, the flow rate of the airflow flowing in from the airflow inflow portion can be reduced. Further, by reducing the flow rate of the airflow, the particle size of the powder or granular material discharged from the airflow outflow portion can be reduced, that is, miniaturization is possible. Further, by reducing the flow rate of the airflow, the device that generates the airflow can be miniaturized, and the entire device can be miniaturized. Furthermore, by suppressing the flow rate of the airflow to a small level, it is possible to reduce power consumption and save power.

2. 2. In the above configuration, the swirling airflow generating portion may include a second rotating body that rotates around a central axis, and a plurality of blades that are erected radially around the peripheral portion of the second rotating body. With such a configuration, it is possible to classify the powder or granular material with a simple configuration.

3. 3. In the above configuration, the surface of the guide surface extending in the circumferential direction from the front end portion in the rotation direction of the swirling airflow generating portion is located radially outside the swirling airflow generating portion. With this configuration, the airflow guided by the guide surface does not easily interfere with the centrifugal force applied to the powder or granular material from the swirling airflow generating portion. In addition, it is possible to prevent the powder or granular material from colliding with the swirling airflow generating portion.

4. In the above configuration, the housing comprises a tubular housing cylinder extending along the central axis, and at least one of the guides extends radially inward from the housing cylinder. With such a configuration, it is possible to firmly fix the guide portion.

5. In the above configuration, the housing is provided with a housing top plate portion extending in a direction orthogonal to the central axis at the upper end portion in the vertical direction, and at least one of the guide portions is downward from the lower surface of the housing top plate portion. Extend. With such a configuration, it is possible to firmly fix the guide portion. In addition, since the guide portion can be taken out together with the housing top plate portion, maintenance is easy.

6. In the above configuration, the guide portion has a plate shape.

7. In the above configuration, the guide surface is a curved surface in which the intermediate portion in the circumferential direction bulges in the radial direction.

8. In the above configuration, the guide surface is located on the front side in the rotation direction of the swirling airflow generating portion with respect to the lower side on the upper side.

According to the present invention, it is possible to provide a powder processing apparatus having a simple structure and capable of reducing the flow rate of the air flow and making the powder or granular material finer.

It is sectional drawing of the powder processing apparatus which concerns on this invention. It is a top view of the crushing part. FIG. 3 is a sectional view taken along line III-III of the crushed portion shown in FIG. It is a top view of the swirling airflow generation part and the guide part. It is sectional drawing which shows the other attachment method of a guide plate. It is a top view which shows the other example of the guide part used in the powder processing apparatus which concerns on this invention. It is a top view which shows still another example of a guide part. It is a schematic layout drawing of an example of the powder processing system which concerns on this invention. It is sectional drawing of the conventional powder processing apparatus used for the test of the comparative example. It is a graph which shows the result of test 1. It is a graph which shows the result of the test 2. It is a graph which shows the time until the crushing part returns to the idling state after the raw material supply stop. It is a graph which shows the pulverization efficiency. It is a graph which shows the content rate of the fine powder contained in the produced powder or granular material. It is a graph which shows the pulverization efficiency.

The powder processing apparatus according to the present invention will be described with reference to the drawings.

<1. Configuration of powder processing equipment>
FIG. 1 is a cross-sectional view of the powder processing apparatus according to the present invention. The powder processing apparatus A crushes the agglomerated material into powder or granular material. As shown in FIG. 1, the powder processing apparatus A includes a housing 10, a raw material supply unit 20, a drive unit 30, a crushing unit 40, a swirling airflow generation unit 50, a guide unit 60, and an airflow outflow unit. 70 and. The direction in which the central axis C1 extends is the vertical direction. The direction orthogonal to the vertical direction is the radial direction, the side facing the center is the inside, and the side away from the center is the outside. Further, the direction along the circumference about the central axis C1 is defined as the circumferential direction.

<1.1 Configuration of housing 10>
The housing 10 includes a housing 11, a shaft holding portion 12, a raw material receiving hole 13, an airflow inflow portion 14, a bottom cover 15, and a hinge 16. The housing 11 has a cylindrical shape extending along a central axis C1 extending vertically.

<1.1.1 Configuration of housing 11>
As shown in FIG. 1, the housing 11 includes a housing bottom portion 111, a housing cylinder portion 112, a flange portion 113, and a housing top plate portion 114. The housing bottom 111 has a disk shape that extends outward. The housing 11 is fixed to a stand or the like (not shown) so that the bottom portion 11 of the housing is horizontal. The housing cylinder portion 112 has a cylindrical shape extending upward along the central axis C1 from the outer edge portion of the housing bottom portion 111. The housing cylinder portion 112 has a cylindrical shape centered on the central axis C1.

The flange portion 113 extends outward from the upper end of the housing cylinder portion 112. The flange portion 113 and the housing cylinder portion 112 are integrally molded bodies. That is, the housing bottom portion 111, the housing cylinder portion 112, and the flange portion 113 are integrally molded metals. Examples of the metal include, but are not limited to, stainless steel.

As shown in FIG. 1, the lower end of the housing cylinder 112 is closed by the housing bottom 111. Further, the upper end of the housing cylinder 112 is open. The housing top plate portion 114 closes the opening at the upper end of the housing cylinder portion 112. The housing top plate portion 114 is attached to the flange portion 113 via the hinge 16. As a result, the housing top plate portion 114 rotates about the rotation shaft 161 of the hinge 16 to open and close the opening of the housing cylinder portion 112.

Further, in a state where the opening of the housing cylinder portion 112 is closed, the housing top plate portion 114 is fixed to the flange portion 113 with screws or the like. As a result, the housing cylinder portion 112 and the housing top plate portion 114 are securely fixed and sealed so that airflow does not leak from the gap. It should be noted that the fixing with screws or the like may be performed at one place, but it is preferably fixed at a plurality of places in order to reliably fix and seal. Further, a gasket, packing or the like may be arranged to improve the airtightness.

A through hole 115 that penetrates vertically is formed in the central portion of the bottom portion 111 of the housing. The first shaft 31 and the second shaft 32, which will be described later, of the drive unit 30 penetrate through the through hole 115. Further, a discharge hole 116 that penetrates vertically is provided in the central portion of the housing top plate portion 114.

<1.1.2 Configuration of shaft holding unit 12>
As shown in FIG. 1, the shaft holding portion 12 has a cylindrical shape that is arranged at the central portion of the housing bottom portion 111 and extends vertically. The center of the shaft holding portion 12 coincides with the central shaft C1. The shaft holding portion 12 is fixed to the bottom portion 111 of the housing with a fixing tool such as a screw.

A seal (here, a labyrinth seal) is formed at the upper end of the shaft holding portion 12. As a result, the inflow of the airflow containing the powder or granular material into the shaft holding portion 12 is suppressed without hindering the rotation of the first rotating body 41.

<1.1.3 Configuration of raw material receiving hole 13>
The raw material receiving hole 13 receives the bulk raw material supplied from the raw material supply unit 20 into the housing cylinder portion 112, that is, the inside of the housing 10. As shown in FIG. 1, the raw material receiving hole 13 is a through hole provided in the housing cylinder portion 112 and penetrating in the radial direction. The raw material receiving hole 13 is arranged above the crushing portion 40 arranged inside the housing cylinder portion 112.

<1.1.4 Configuration of airflow inflow section 14>
The airflow inflow portion 14 is supplied with an airflow that flows into the inside from the outside of the housing cylinder portion 112. As shown in FIG. 1, the airflow inflow portion 14 is a through hole provided in the housing cylinder portion 112 and penetrating in the radial direction. The airflow inflow portion 14 is arranged below the crushing portion 40.

<1.1.5 Configuration of bottom cover 15>
The bottom cover 15 is arranged inside the housing cylinder portion 112 below the crushing portion 40. The bottom cover 15 is annular. The bottom cover 15 and the first rotating body 41 face each other with a vertical gap. Then, an air flow flows into the gap between the upper surface of the bottom cover 15 and the lower surface of the first rotating body 41 of the crushing portion 40. By this air flow, the powder or granular material crushed by the crushing unit 40 is conveyed to the upper side and the inner side. Therefore, the airflow supplied from the airflow inflow portion 14 is referred to as a transport airflow that conveys the powder or granular material.

<1.2 Configuration of raw material supply unit 20>
As shown in FIG. 1, the raw material supply unit 20 includes a raw material supply pipe 21 and a screw conveyor 22. The raw material supply pipe 21 is a pipe body, and a part of the raw material supply pipe 21 is inserted into the housing cylinder portion 112 through the raw material receiving hole 13 and fixed. A screw conveyor 22 is rotatably arranged inside the raw material supply pipe 21. The screw conveyor 22 rotates to move the bulk raw material along the raw material supply pipe 21. The lumpy raw material moved by the screw conveyor 22 is charged into the inside of the housing cylinder portion 112 through the raw material receiving hole 13. A transport method other than the screw conveyor may be adopted.

<1.3 Configuration of drive unit 30>
The drive unit 30 drives the crushing unit 40 and the swirling airflow generating unit 50. As shown in FIG. 1, the drive unit 30 includes a first shaft 31, a second shaft 32, a first belt 331, and a second belt 332.

<1.3.1 Configuration of 1st shaft 31>
The first shaft 31 has a cylindrical shape. The first rotating body 41 is fixed to the upper end of the first shaft 31. The first shaft 31 is rotatably supported inside the shaft holding portion 12 via a bearing (not shown). The first shaft 31 is supported in the vertical direction with respect to the shaft holding portion 12, and is rotatably supported around the central axis C1.

The lower end of the first shaft 31 penetrates the through hole 115 of the housing bottom 111 and projects below the housing bottom 111. The first pulley 311 is fixed to the lower end of the first shaft 31 while being prevented from rotating by the first shaft 31. Examples of the fixing method of the first pulley 311 include, but are not limited to, press fitting, welding, and adhesion. In addition, a key and a keyway may be adopted in order to reliably prevent rotation. The cross-sectional shape of the first shaft 31 may be a shape other than a circular shape to prevent rotation.

A first belt 331 is wound around the first pulley 311. A rotational force from a motor (not shown) is transmitted via the first belt 331, and the first pulley 311 rotates around the central axis C1. As a result, the first shaft 31 to which the first pulley 311 is attached and the first rotating body 41 fixed to the first shaft 31 rotate around the central axis C1.

<1.3.2 Configuration of the second shaft 32>
The second shaft 32 is cylindrical and is arranged inside the tubular first shaft 31. The second shaft 32 is rotatably supported by the first shaft 31 via a bearing (not shown). That is, the second shaft 32 is rotatably supported around the central axis C1 by the shaft holding portion 12.

The lower end of the second shaft 32 projects below the lower end of the first shaft 31. The second pulley 321 is fixed to the portion of the second shaft 32 that protrudes below the lower end of the first shaft 31 while being prevented from rotating. Examples of the fixing method of the second pulley 321 include, but are not limited to, press fitting, welding, and adhesion. In addition, a key and a keyway may be adopted in order to reliably prevent rotation. Further, the cross-sectional shape of the second shaft 32 may be a shape other than a circular shape to prevent rotation.

A second belt 332 is wound around the second pulley 321. A rotational force from a motor (not shown) is transmitted via the second belt 332, and the second pulley 321 rotates around the central axis C1. As a result, the second shaft 32 to which the second pulley 321 is attached and the second rotating body 51 fixed to the second shaft 32 rotate around the central axis C1.

Since the first pulley 311 and the second pulley 321 can rotate at different rotation speeds, driving force may be transmitted from different motors. Further, by using a speed reducer, it is possible to rotate the first pulley 311 and the second pulley 32 at different rotation speeds by using a common motor. Here, the different rotation speeds include not only the case where the rotation direction is the same but also the case where the rotation direction is different.

<1.4 Configuration of crushing section 40>
The crushing unit 40 is arranged below the raw material supply unit 20. Then, the crushing unit 40 crushes the lumpy raw material supplied from the raw material supply unit 20 into powder or granular material. Here, the details of the crushing section 40 will be described with reference to a new drawing. FIG. 2 is a plan view of the crushed portion. FIG. 3 is a sectional view taken along line III-III of the crushed portion shown in FIG. As shown in FIGS. 1 to 3, the crushing portion 40 is arranged inside the housing cylinder portion 112, and includes a first rotating body 41, a hammer 42, and a liner 43.

<1.4.1 Configuration of the first rotating body 41>
As shown in FIG. 2, the first rotating body 41 is circular when viewed in the vertical direction. That is, the first rotating body 41 has a disk shape. At the center of the first rotating body 41, a shaft fixing hole 411 penetrating vertically is provided. The shaft fixing hole 411 is fixed while the first shaft 31 is prevented from rotating. For fixing the first shaft 31 and the shaft fixing hole 411, for example, press-fitting can be mentioned. In addition, other fixing methods that can be fixed, such as screw welding and adhesion, can be widely adopted. Further, the key groove and the key may be used to reliably prevent rotation, or the cross-sectional shape of the first shaft 31 may be a shape other than a circle to prevent rotation.

As shown in FIGS. 2 and 3, the upper surface of the first rotating body 41 is provided with a plurality of (here, 12) hammer mounting portions 412 on the outer edge. As shown in FIG. 3, the hammer mounting portion 412 is a recess recessed downward from the upper surface of the first rotating body 41. The hammer mounting portions 412 are arranged at equal intervals in the circumferential direction. The hammer mounting portion 412 extends inward from the outer edge of the first rotating body 41. The inside of the hammer mounting portion 412 is formed in an arc shape.

<1.4.2 Hammer 42 configuration>
The hammer 42 is an example of a crushing member. The hammer 42 includes a hammer base 421, a rising portion 422, and a crushing blade 423. The hammer base 421 has a flat plate shape and is inserted into the hammer mounting portion 412. Then, the hammer base 421 is fixed to the first rotating body 41 with, for example, a screw 40a (see FIGS. 2 and 3). The fixing method may be welding, adhesion, or the like.

The rising portion 422 integrally projects from one end of the hammer base 421 to one side. As shown in FIG. 3, when the hammer base 421 is inserted into the hammer mounting portion 412, the rising portion 422 rises upward. Then, the crushing blade 423 is arranged outside the rising portion 422 in the radial direction. The crushing blade 423 has a plurality of irregularities extending up and down. The unevenness may extend in parallel with the central axis C1 or may be inclined in the circumferential direction with respect to the central axis C1.

<1.4.3 Configuration of liner 43>
As shown in FIG. 2, the liner 43 is annular. The inner surface of the liner 43 faces the outer surface of the hammer 42 with a radial gap. The liner 43 includes a plurality of liner chips 431, and the liner chips 431 are arranged side by side in contact with each other in the circumferential direction along the inner peripheral surface of the housing cylinder portion 112. As a result, the inner peripheral surface of the liner 43 facing the hammer 42 is formed into a polygonal annular shape. The liner tip 431 may be fixed to the housing cylinder portion 112 with screws, for example. The liner tip 431 includes a crushing blade 432 having irregularities formed on its inner surface. The crushing blade 432 may have irregularities extending up and down like the crushing blade 423 of the hammer 42. Further, the crushing blade 432 may be formed by intersecting the concave grooves, and the convex portion may be formed into a polygonal shape such as a square or an equilateral triangle. Further, the pin-shaped convex portions may be arranged two-dimensionally.

As the first rotating body 41 rotates, the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner tip 431 move relatively in the circumferential direction. The crushing blade 423 and the crushing blade 432 crush the lumpy raw material during the high-speed rotation of the first rotating body 41. Therefore, at least the crushing blade 423 of the hammer 42 and at least the crushing blade 432 of the liner tip 431 have high strength and hardness and excellent wear resistance, such as ceramics (alumina, zirconia, etc.), tungsten carbide, cemented carbide, tool steel, etc. Is formed by. The entire hammer 42 may be made of these materials. Further, the material having high wear resistance is an example, and the material is not limited thereto.

The surface of the liner tip 431 on which the crushing blade 432 is formed is flat. Therefore, the liner tip 431 can be easily manufactured as compared with the configuration in which the crushing blade 432 is provided on the curved surface. Further, by changing the number of liner chips 431, it is possible to change the inner diameter of the liner 43 within a certain range. Therefore, it is possible to make the liner tip 431 common to the liners 43 having different sizes. Further, since the liner tip 431 has a simple shape, it is easy to manufacture the liner tip 431 from a material that is difficult to process a complicated shape, for example, ceramic or the like. This makes it possible to reduce the cost required for manufacturing the powder processing apparatus A. The crushing blade 432 may be formed on the inner surface of the annular liner 43.

Although omitted in the present embodiment, a top plate may be attached to the upper surface of the first rotating body 41. The top plate is provided to suppress damage, wear, etc. of the rotating body 41, the hammer 42, the screw 40a, etc. due to the collision of the raw material input from the raw material receiving hole 13. The top plate can be made of a material having excellent wear resistance.

<1.5 Configuration of swirling airflow generator 50>
The swirling airflow generating portion 50 is arranged inside the housing 10 on the upper side of the crushing portion 40. That is, the discharge hole 116 is provided on the upper side of the swirling airflow generating portion 50. The swirling airflow generating unit 50 rotates to generate a swirling airflow inside the housing 10. Then, the swirling airflow generating unit 50 applies centrifugal force to the powder or granular material by generating the swirling airflow. The details of the swirling airflow generating unit 50 will be described with reference to the new drawings. FIG. 4 is a plan view of the swirling airflow generating portion and the guiding portion. As shown in FIGS. 1 and 4, the swirling airflow generating unit 50 includes a second rotating body 51 and a plurality of blades 52.

<1.5.1 Configuration of the second rotating body 51>
As shown in FIG. 4, the second rotating body 51 is circular in a plan view. That is, the second rotating body 51 has a disk shape. The second shaft 32 is fixed to the second rotating body 51 while being stopped from rotating. The center of the second rotating body 51 and the second shaft 32 overlaps with the central axis C1. The second shaft 32 may be fixed by press-fitting it into a through hole (not shown), or may be screwed, welded, bonded, or the like. Further, the key and the key groove may be used to prevent rotation. As a result, the second shaft 32 rotates, so that the second rotating body 51, that is, the swirling airflow generating portion 50, rotates around the central axis C1.

<1.5.2 Blade 52 configuration>
A plurality of blades 52 extend radially on the upper surface of the second rotating body 51, and a plurality of blades 52 are fixed at equal intervals and radially in the circumferential direction. The plurality of blades may be fixed by welding, adhesion, or the like after being inserted into the concave groove formed on the upper surface of the second rotating body 51, for example. The upper side of the blade 52 fixed to the upper surface of the second rotating body 51 expands outward. That is, when the swirling airflow generating portion 50 rotates, the portion through which the outer end portion of the upper end portion of the blade 52 passes becomes the outermost portion in the passing region of the blade 52.

The blade 52 has a surface orthogonal to the swirling direction of the swirling airflow generating portion 50. As the swirling airflow generating portion 50 rotates, an airflow flowing in the circumferential direction is generated inside the housing 10. As shown in FIG. 4, the swirling airflow generating unit 50 rotates in the counterclockwise direction Rd in a plan view. Due to the rotation of the swirling airflow generating portion 50, a swirling airflow (hereinafter referred to as a swirling airflow) in the counterclockwise direction Rd is generated inside the housing 10, that is, the housing cylinder portion 112 along the housing cylinder portion 112. appear. Further, although the details will be described later, the powder or granular material is sorted (hereinafter referred to as classification) according to the size of the particles by the swirling airflow generated by the swirling airflow generating unit 50.

<1.6 Configuration of guide unit 60>
As shown in FIGS. 1 and 4, the guide portion 60 includes a guide plate 61 and a support rib 62 arranged inside the housing cylinder portion 112. The guide plate 61 is an example of a guide member.

<1.6.1 Configuration of guide plate 61>
As shown in FIG. 4, a plurality of (here, 6) guide plates 61 are arranged at equal intervals in the circumferential direction inside the housing cylinder portion 112. The guide plate 61 is a rectangular plate, and the guide plate 61 extends vertically. The guide plate 61 includes a guide surface 611 facing the swirling airflow generating portion 50 in the radial direction. As shown in FIG. 1, the lower end portion of the guide surface 611 extends to the same or substantially the same position as the lower end portion of the blade 52 of the swirling airflow generating portion 50.

As shown in FIG. 4, the guide plate 61 has a housing cylinder portion 112 so that the swirling airflow generating portion 50 of the guide surface 611, that is, the front side in the rotation direction of the second rotating body 51 is inside with respect to the rear side. It is fixed to the inner surface of. The guide plate 61 may be fixed by welding, adhesion, or the like, but the method is not limited to this, and the guide plate 61 may be fixed by being inserted into a groove provided in the housing cylinder portion 112. .. A fixing method that can securely fix the guide plate 61 can be widely adopted.

As shown in FIG. 4, the surface 612 extending along the circumferential direction from the front end portion of the swirling airflow generating portion 50 of the guide surface 611 in the rotational direction is outside the region through which the blade 52 of the swirling airflow generating portion 50 passes. To position. The guide surface 611 guides the airflow generated by the swirling airflow generating portion 50 inward so as not to be directly blown to the swirling airflow generating portion 50. As a result, the powder or granular material swirling due to the swirling airflow is guided inward while being suppressed from colliding with the blade 52.

<1.6.2 Configuration of support rib 62>
As shown in FIGS. 1 and 4, the support rib 62 has a plate shape fixed to the surface of the guide plate 61 opposite to the guide surface 611 and the inner surface of the housing cylinder portion 112. The support rib 62 fixes the guide plate 61. By providing the support rib 62, the deflection when the airflow is blown to the guide plate 61 is suppressed, and the guide plate 61 guides the swirling airflow inward.

In the present embodiment, one support rib 62 is provided at the center of the upper and lower sides of the guide plate 61. However, a plurality of support ribs 62 may be provided. Further, the support rib 62 may be provided so as to support the entire guide plate 61.

<1.6.3 Other examples of guide section>
Another example of the guide unit 60 will be described. FIG. 5 is a cross-sectional view showing another mounting method of the guide plate. As shown in FIG. 5, the guide plate 61 may be fixed to the lower surface of the housing top plate portion 114. In FIG. 5, the guide plate 61 is fixed to the housing top plate portion 114 by screwing, but welding, welding, or the like may be adopted in addition to screwing. Further, as shown in FIG. 5, the guide plate 61a may be directly attached and fixed to the lower surface of the housing top plate portion 114, or may be inserted and fixed in a recess formed on the lower surface of the housing top plate portion 114 and recessed upward. The guide plate 61b may be used. With this configuration, the guide plate (61a, 61b) can be taken out to the outside by removing the housing top plate portion 114, so that the maintenance of the guide plate (61a, 61b) is easy. When the guide plate is attached to the housing top plate portion 114, the guide plate may have a shape that does not easily interfere with the opening and closing of the housing top plate portion 114. Further, the housing top plate portion 114 may be attached to the flange portion 113 without using a hinge.

FIG. 6 is a plan view showing another example of the guide portion used in the powder processing apparatus according to the present invention. As shown in FIG. 6, it may be a curved guide plate 63. In such a guide plate 63, the guide surface 631 is also a curved surface. Then, the surface 632 extending along the circumferential direction from the front end portion of the second rotating body 51 of the guide surface 631 in the rotational direction is guided so as to be outside the region through which the blade 52 of the swirling airflow generating portion 50 passes. The plate 63 is arranged. As described above, by providing the curved guide surface 631, it is possible to smoothly guide the swirling airflow. The guide surface 631 is a curved surface that is convex outward, but is not limited to this, and may be a curved surface that is convex inward. A shape that does not easily generate a vortex can be widely adopted depending on the flow velocity of the swirling airflow, the viscosity of the airflow, and the like.

Further, the guide members 64, 65, 66 as shown in FIG. 7 may be provided. FIG. 7 is a plan view showing still another example of the guide portion. As shown in FIG. 7, as the guide member 64, a guide member 64 protruding in the radial direction may be used instead of the flat plate-shaped guide plate. At this time, the surface 642 extending the front end of the second rotating body 51 of the guide surface 641 of the guide member 64 in the rotation direction is outside the region through which the blade 52 of the swirling airflow generating portion 50 passes. Further, the guide surface 651 may be lengthened like the guide member 65, or the guide surface 661 may be curved like the guide member 66. The guide members 64, 65, 66 may be integrally formed with the housing 11. Further, the guide members 64, 65, 66 manufactured as separate members may be fixed inside the housing 11. The surfaces 642, 652, and 662 that extend the front end of the second rotating body 51 of the guide surfaces 641, 651, and 661 in the rotation direction are outside the region through which the blade 52 of the swirling airflow generating portion 50 passes. become.

The guide surfaces 611, 631, 641, 651, and 661 described above are composed of surfaces extending vertically, that is, surfaces at the same position in the circumferential direction from the upper end portion to the lower end portion. However, it is not limited to this. For example, the upper side of the guide surface may be located on the front side in the rotation direction of the first rotating body 41 with respect to the lower side. As a result, the swirling airflow can be smoothly guided inward.

<1.7 Configuration of airflow outflow section 70>
The airflow outflow section 70 discharges the airflow (air) flowing in from the airflow inflow section 14 to the outside. As shown in FIG. 1, the airflow outflow portion 70 is attached to the upper surface of the housing top plate portion 114. The airflow outflow portion 70 includes an exhaust pipe portion 71 and an exhaust flange 72. The exhaust stack portion 71 has a cylindrical shape and communicates with the discharge hole 116 provided in the center of the housing top plate portion 114. Then, the air inside the housing 11 flows into the exhaust stack portion 71 through the discharge hole 116.

The exhaust flange 72 may be arranged on the upper surface of the housing top plate portion 114 via a gasket (not shown). The exhaust flange 72 is fixed to the housing top plate 114, for example, with screws. As a result, the airtightness between the housing top plate portion 114 and the exhaust stack portion 71 is enhanced, and airflow leakage is suppressed. An O-ring or the like may be used instead of the gasket. Further, a concave portion may be formed on one side of the airflow outflow portion 70 and the housing top plate portion 114, and a convex portion may be formed on the other side, and the convex portion may be inserted into the concave portion to seal the portion.

<2. Operation of powder processing equipment>
The powder processing apparatus A according to the present invention has the configuration shown above. Next, the powder processing system using the powder processing apparatus A will be described, and the operation of the powder processing apparatus included in the powder processing system will be described. FIG. 8 is a schematic layout diagram of an example of the powder processing system according to the present invention. The powder processing system CL shown in FIG. 8 includes a raw material supply device Ma, a powder processing device A, a filter device Ft, and a blower Bw.

The powder processing apparatus A is fixed to the horizontal plane of the gantry Ca with screws or the like (not shown). Then, the airflow outflow portion 70 of the powder processing apparatus A and the inflow portion Ft3 of the filter device Ft are connected via a pipe. The filter device Ft is, for example, a bug filter. The filter device Ft includes a housing Ft1, a partition portion Ft2, an inflow portion Ft3, an outflow portion Ft4, a filter medium Ft5, and an outlet Ft6. In the filter device Ft, the partition portion Ft2 partitions the inside of the housing Ft1 into an upper portion and a lower portion. The partition portion Ft2 is provided with a plurality of through holes. Below the partition portion Ft2 of the housing Ft1, a cylindrical filter medium Ft5 that surrounds the periphery of the through hole of the partition portion Ft2 and extends downward is arranged.

The airflow from the powder processing apparatus A flows from the inflow portion Ft3 into the housing Ft1, passes through the filter medium Ft5, and flows out from the outflow portion Ft4 to the outside. At this time, the powder or granular material is collected on the outer surface of the filter medium Ft5. In the filter device Ft, compressed gas (compressed air) is periodically blown from a pipe (not shown) to drop the powder or granular material collected by the filter medium Ft5 downward.

An outlet Ft6 is provided at the lower end of the housing Ft1. The powder or granular material collected in the lower part of the housing Ft5 is taken out from the take-out port Ft6. In the powder processing system CL, the powder or granular material taken out from the take-out port Ft6 is the powder or granular material after classification, that is, a manufactured product.

The outflow portion Ft4 of the filter device Ft is connected to the blower Bw via a pipe. The blower Bw generates a negative pressure in the pipe connected to the outflow portion Ft4. By the generation of this negative pressure, an air flow toward the blower Bw is generated in the filter device Ft, the powder processing device A, and the piping connecting them. Further, in the powder processing apparatus A, the airflow flows in from the airflow inflow portion 14 due to this negative pressure. A separate blower (not shown) may be provided on the outside of the airflow inflow portion 14 to forcibly inflow the generated airflow.

The operation of the powder processing apparatus A will be described. In the powder processing apparatus A, the raw material supply unit 20 supplies the bulk raw material in a state where the first rotating body 41 and the second rotating body 51 are rotating. The raw material supplied from the raw material supply unit 20 falls on the first rotating body 41 of the crushing unit 40. The raw material is pulverized into powder or granular material by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43.

In the powder processing apparatus A, air (air flow) flows into the inside of the housing 11 from the air flow inflow portion 14 as described above. The airflow flowing in from the airflow inflow portion 14 flows radially outward from the gap between the first rotating body 41 and the bottom cover 15, and flows from between the first rotating body 41 and the liner 43 along the housing cylinder portion 112. Flows upward. The outflow destination of the airflow is the airflow outflow portion 70. Therefore, the airflow flowing out from between the first rotating body 41 and the liner 43 goes upward as well as inward. Further, the air flow moves together with the crushed powder or granular material as it passes between the first rotating body 41 and the liner 43. That is, the powder or granular material crushed by the crushing unit 40 is transported upward and inward by the transport air flow.

At the upper part of the housing 11, a swirling airflow is generated by the swirling airflow generating portion 50. The conveyed airflow flowing from the airflow inflow portion 14 merges with the swirling airflow. At this time, two forces, an inward force F1 due to the conveyed airflow and an outward force F2 due to the swirling airflow, act on the powder or granular material contained in the conveyed airflow. The force F1 changes depending on the flow rate (flow velocity) of the conveyed airflow, and the larger the conveyed airflow, the larger the force F1. Further, the force F2 changes depending on the flow rate (flow velocity) of the swirling airflow, that is, the rotation speed of the swirling airflow generating unit 50, and the higher the rotation speed of the swirling airflow generating unit 50, the larger the force F2.

From the above, among the powder and granules conveyed by the conveyed airflow, the particle size of the powder and granules conveyed together with the airflow discharged from the airflow outflow portion 70 is the flow rate of the conveyed airflow and the swirling airflow generating portion 50. Determined by the number of revolutions. _{More specifically, the median diameter D 50} of the powder or granular material discharged from the airflow outflow portion 70 is proportional to the square root of the flow rate of the conveyed airflow and inversely proportional to the rotation speed of the swirling airflow generating portion 50. In the powder processing apparatus A, the particle size of the powder or granular material discharged from the airflow outflow portion 70, that is, to be classified is determined by adjusting the flow rate of the conveyed airflow and the rotation speed of the swirling airflow generating portion 50. The particle size can be adjusted. The median diameter D ₅₀ is a particle size in which the number of powder particles having a diameter smaller than the particle size and the number of powder particles having a larger diameter are the same when the powder particles are arranged in order of particle size. be.

Further, the powder or granular material that is not discharged from the airflow outflow portion 70 due to classification has a particle size larger than the determined particle size. Such powder or granular material is pushed outward by the swirling airflow, comes into contact with the inner surface of the housing cylinder portion 112, and then moves downward along the inner surface of the housing cylinder portion 112. Then, after being crushed again by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43, it is again conveyed upward by the conveying airflow.

In this way, by repeating crushing by the hammer 42 and the liner 43, transportation by the transport airflow, and classification by the swirling airflow, the raw material is crushed to a predetermined particle size or smaller. The generated powder or granular material is collected by the filter device Ft and taken out.

In the powder processing apparatus A according to the present invention, the guide plate 61 is arranged inside the housing 11. The guide surface 611 of the guide plate 61 guides the swirling airflow inward. This action causes the swirling airflow to move inward. The force F1 due to the swirling airflow can be made smaller than when the guide plate 61 is not arranged. Therefore, it is possible to reduce the flow rate of the conveyed airflow and the rotation speed of the swirling airflow generating unit 50 in order to obtain a predetermined particle size. In other words, since the flow rate of the conveyed airflow can be suppressed to a small level, the powder or granular material can be miniaturized. Further, by lowering the flow rate of the conveyed airflow and the rotation speed of the swirling airflow generating unit 50, it is possible to reduce power consumption, that is, energy saving.

Further, the guide surface 611 is arranged so as to smoothly guide the swirling airflow inward. Therefore, as compared with the conventional configuration in which the swirling airflow collides with the plate-shaped member, the powder or granular material is less likely to adhere to the guide plate 61, and the swirling airflow is less likely to generate a vortex. Therefore, the powder or granular material can be produced smoothly and efficiently.

It should be noted that the so-called airflow drying device may be used, in which the moisture of the powder or granular material crushed by the hammer 42 and the liner 43 is removed by inflowing high temperature and low humidity, that is, high temperature dry air from the airflow inflow portion 14. It is possible.

<2.1 Other examples of powder processing equipment>
In the powder processing apparatus, the particle size of the powder or granular material moving inward can be adjusted by using the swirling airflow generated by the swirling airflow generating unit 50 and the airflow conveyed by the conveyed airflow. Taking advantage of this, while discharging powder particles having a particle size smaller than a certain size, polishing is repeated between the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43 to obtain a constant particle size. It is possible to produce granules having few sharp points, that is, close to a sphere (referred to as spheroidization). Then, by providing a take-out port (not shown) in the housing cylinder portion 112 of the powder processing apparatus A and taking out the take-out port from the take-out port, a spherical powder or granular material can be obtained.

As described above, in the powder processing apparatus A, since the swirling airflow is directed inward by the guide surface 611, the powder or granular material can be conveyed inward even if the flow rate of the conveyed airflow is low. Even if the flow rate of the conveyed airflow is low, the powder or granular material is unlikely to remain inside the housing 11. As a result, crushing is repeated by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43, and over-crushing, which is excessively crushed, can be suppressed, and the amount of fine powder generated can be suppressed.

<3. Evaluation of powder processing equipment>
The characteristics of the powder processing apparatus A according to the present invention were evaluated. As a comparative example, a conventional powder processing apparatus P was used. FIG. 9 is a cross-sectional view of a conventional powder processing apparatus used in the test of the comparative example.

The powder processing apparatus P shown in FIG. 9 has substantially the same configuration as the powder processing apparatus A shown in FIG. 1 except that the inner cylinder 81 and the vertical vane 82 are provided in place of the guide plate 61. .. Therefore, in the powder processing apparatus P, substantially the same portions as those of the powder processing apparatus A are designated by the same reference numerals, and detailed description of the same portions will be omitted. In addition, in FIG. 9, the reference numeral of the portion which is not directly related to the feature of this invention is also omitted.

As shown in FIG. 9, the powder processing apparatus P includes an inner cylinder 81 inside the housing cylinder portion 112. The inner cylinder 81 has a cylindrical shape that wraps the outside of the swirling airflow generating portion 50. The vertical vane 82 is a flat plate and connects the outer surface of the inner cylinder 81 and the inner surface of the housing cylinder portion 112. A plurality (for example, six) of the vertical vanes 82 are provided, and the vertical vanes 82 are arranged along the radial direction.

In the powder processing apparatus P, the powder or granular material conveyed in the swirling airflow flows in the circumferential direction along the housing cylinder portion 112 and collides with the vertical vane 82. Then, it falls to the lower side. Then, the fallen powder or granular material is crushed again by the crushing unit 40. The powder processing apparatus P of the comparative example has such a configuration.

The operation of the powder processing apparatus P will be described. In the powder processing apparatus P, as in the powder processing apparatus A, the raw material supplied from the raw material supply unit 20 falls onto the first rotating body 41 of the crushing unit 40. The raw material is pulverized into powder or granular material by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43. Then, the crushed raw material is conveyed by the transport airflow and passes between the inner circumference of the housing cylinder portion 112 and the outer circumference of the inner cylinder 81. After that, the powder or granular material is classified by the swirling airflow generating unit 50. Then, the powder or granular material smaller than the determined particle size passes through the gap of the blade 52 and is discharged to the outside through the discharge hole 116. Further, the powder or granular material having a particle size larger than the determined particle size moves downward inside the inner cylinder 81 and falls on the first rotating body 41. Then, the dropped powder or granular material is again pulverized by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43 into finer powder or granular material, that is, having a smaller particle size. In the powder processing apparatus P, by repeating the above operation, the raw material is crushed into powder or granular material and classified.

<3.1 Test conditions>
In the following evaluation, the test result using the powder processing apparatus A of the present invention will be used as an example, and the test result conducted using the conventional powder processing apparatus P will be used as a comparative example. The outer diameter of the outside of the hammer 42 of the crushing portion 40 is defined as the outer diameter of the hammer. Both the examples and the comparative examples are tested under the same conditions. The test conditions are as follows. The part where the conditions change for each evaluation will be explained for each evaluation. In the graphs used in the following explanation, examples are shown in squares and comparative examples are shown in triangles.
Hammer crushing blade shape: Vertical hammer outer diameter: 318.1 mm
Number of hammers: 12 Number of rotations of crushing part: 7000 rpm
Rotational speed of swirling airflow generator: 2000 rpm to 7000 rpm
Crushed raw material: Heavy calcium carbonate (particle size approx. 1 mm)

<3.2 Evaluation 1>
In evaluation 1, the operating conditions of the powder processing apparatus A and the powder processing apparatus P were set as described above, and tests 1 and 2 were performed by changing the flow rate of the transport airflow in each powder processing apparatus. The flow rate of the conveyed airflow in each test is as follows.
Test 1
Transport airflow flow rate: Standard flow rate test 2
Transport airflow flow rate: 1/3 of the standard flow rate

The standard flow rate is the flow rate of the air flow supplied to the powder processing device P, that is, the flow rate of the conveyed air flow in the conventional powder processing performed by using the powder processing device P. The results of Test 1 and Test 2 are shown in FIGS. 10 and 11. FIG. 10 is a graph showing the results of Test 1. FIG. 11 is a graph showing the results of Test 2. In the graphs shown in FIGS. 10 and 11, the vertical axis represents the pulverization efficiency (kg / kW · h) and the horizontal axis represents the median diameter (D ₅₀ μm). Grinding efficiency indicates the processing capacity of raw materials per unit electric power.

As shown in FIG. 10, when the flow rate of the conveyed airflow is large (standard flow rate), there is almost no difference in pulverization efficiency between the examples and the comparative examples. On the other hand, as shown in FIG. 11, when the flow rate of the conveyed airflow is small (1/3 of the standard flow rate), the crushing efficiency of the example is higher than that of the comparative example. That is, it was found that the powder processing apparatus A of the present invention has higher pulverization efficiency than the conventional powder processing apparatus P when the flow rate of the conveyed airflow is small.

<3.3 Evaluation 2>
Next, in both the examples and the comparative examples, the flow rate of the conveyed air flow was set to 1 / 3.75 of the standard flow rate, and the time from when the supply of the raw material was stopped to the state of no load, that is, to the return to idling was compared. The results are shown in FIG. FIG. 12 is a graph showing the time until the crushed portion returns to the idling state after the supply of raw materials is stopped.

In the graph of FIG. 12, the vertical axis is the time from when the raw material supply is stopped until the load of the crushing unit 40 is minimized, that is, it returns to the idling state. The horizontal axis is the median diameter D ₅₀ of the produced powder or granular material. The time that the powder or granular material stays inside the housing 11 is the time required for the treatment.

As shown in FIG. 12, the time from stopping the supply of raw materials to returning to the idling state is shorter in Examples than in Comparative Examples when the _{median diameter D 50 is the same.} That is, it was found that when the flow rate of the transport airflow is small, the powder processing apparatus A has a shorter processing time than the powder processing apparatus P until the raw materials are crushed to obtain powder or granular materials having a predetermined particle size. rice field. From this, it can be seen that the powder processing apparatus A of the present invention can shorten the processing tact time as compared with the conventional powder processing apparatus P when the flow rate of the conveyed airflow is small.

<3.4 Evaluation 3>
Next, the raw material was changed from heavy calcium carbonate to scaly graphite (median diameter D ₅₀ is 85 μm). Further, as the crushing blade 432 of the liner 43, a liner having a square groove whose grooves are orthogonal to each other and whose convex portions are rectangular is used. The rotation speed of the crushing unit 40 is 6800 rpm in both the examples and the comparative examples, and the rotation speeds of the swirling airflow generating unit 50 are 3000 rpm and 7000 rpm in both the examples and the comparative examples. The flow rate of the conveyed airflow is 1/3 of the standard flow rate in both the examples and the comparative examples. The test results are shown in FIG. FIG. 13 is a graph showing the pulverization efficiency. In the graph of FIG. 13, similarly to the graph of FIG. 13, the vertical axis is the crushing efficiency and the horizontal axis is the median diameter D ₅₀ .

Even if the raw material is changed from heavy calcium carbonate to scaly graphite, the pulverization efficiency of the powder processing apparatus A according to the present invention is higher than the pulverization efficiency of the conventional powder processing apparatus P when the flow rate of the conveyed airflow is small. Turned out to be expensive.

<3.5 Evaluation 4>
In evaluation 4, the test was carried out using polystyrene as a raw material. When a material such as polystyrene, which is hard to break, is used, if the flow rate of the transport air flow is low, the conventional powder processing apparatus P has a large fluctuation in the crushing load, and stable operation cannot be performed. From this, it was found that the powder processing apparatus A according to the present invention has higher operational stability at a lower air volume than the conventional powder processing apparatus P. That is, it was found that the powder processing apparatus A according to the present invention can reduce the air volume as compared with the conventional powder processing apparatus P.

<3.6 Evaluation 5>
Next, in evaluation 5, a test was conducted using a flake-like powder coating material (□ 5 mm, thickness 1 mm) as a raw material. Then, the content rate (fine powder rate) of the fine powder (particle size less than 9.25 μm) contained in the powder or granular material discharged from the airflow outflow portion 70 was obtained by volume ratio. The test conditions are the same as in Test 2 of Evaluation 1. The results are shown in FIG. FIG. 14 is a graph showing the content of fine powder contained in the produced powder or granular material. In FIG. 14, the vertical axis is the fine powder ratio and the horizontal axis is the median diameter D ₅₀ .

When the powder or granular material having the same median diameter D ₅₀ is produced, the fine powder ratio is lower when the powder processing apparatus A of the present invention is used than when the conventional powder processing apparatus P is used. That is, when producing powder or granular materials having a predetermined particle size using the same amount of raw materials, the powder processing apparatus A of the present invention can produce more powder or granular materials than the conventional powder processing apparatus P. That is, it can be seen that the powder processing apparatus A of the present invention is less wasteful than the conventional powder processing apparatus P and has high powder processing efficiency.

<3.7 Evaluation 6>
In the evaluation 6, the test was performed using the powder processing apparatus A1 and the powder processing apparatus P1 having different sizes from those used in the evaluations 1 to 5. The test conditions are as follows.
Hammer crushing blade shape: Vertical hammer outer diameter: 430.3 mm
Number of hammers: 32 crushing unit rotation speed: 6600 rpm
Rotational speed of swirling airflow generator: 3000 rpm to 5400 rpm
Crushed raw material: Heavy calcium carbonate (particle size approx. 1 mm)
Liner crushing blade shape: Triangular groove Transport airflow rate: 2/3 of standard flow rate

Under the above conditions, a test was conducted using the powder processing apparatus A1 according to the present invention and the conventional powder processing apparatus P1 to obtain pulverization efficiency. The test results are shown in FIG. FIG. 15 is a graph showing the pulverization efficiency. In FIG. 15, the vertical axis represents the crushing efficiency and the horizontal axis represents the median diameter D ₅₀ .

As shown in FIG. 15, when the powder processing apparatus A1 according to the present invention is used, the pulverization efficiency is higher than when the conventional powder processing apparatus P1 is used. As a result, even if the size of the powder processing apparatus, the housing, the size of the crushed portion, and the number of hammers change, the powder processing apparatus according to the present invention having a guide surface is the conventional powder processing apparatus. It can be seen that the crushing efficiency is higher than that.

As shown above, the powder processing apparatus according to the present invention has a guide surface in the housing that guides the swirling airflow generated inside the housing inward, so that the powder processing apparatus can be crushed as compared with the conventional powder processing apparatus. The efficiency is high and the powder processing time can be shortened. Further, the amount of raw materials required to obtain the powder or granular material having a predetermined particle size is less when the powder processing apparatus according to the present invention is used than when the conventional powder processing apparatus is used. Further, in the powder processing apparatus A of the present invention, the flow rate of the inflowing airflow can be reduced as compared with the conventional powder processing apparatus P, that is, the flow rate of the airflow can be reduced. Further, from this, in the powder processing apparatus A of the present invention, it is possible to make the powder or granular material produced finer as compared with the conventional powder processing apparatus P.

Although the embodiments of the present invention have been described above, the present invention is not limited to this content. Further, the embodiments of the present invention can be modified in various ways as long as they do not deviate from the gist of the invention.

10 Housing 11 Housing 111 Housing bottom 112 Housing cylinder 113 Flange 114 Housing top plate 115 Through hole 116 Outlet hole 12 Shaft holding part 13 Raw material receiving hole 14 Air flow inflow part 15 Bottom cover 20 Raw material supply part 30 Drive part 31 No. 1 Shaft 311 1st pulley 32 2nd shaft 321 2nd pulley 331 1st belt 332 2nd belt 40 Crushing part 41 1st rotating body 412 Hammer mounting part 42 Hammer 423 Crushing blade 43 Liner 432 Crushing blade 50 Swirling airflow generating part 51 Second rotating body 52 Blade 60 Guide part 61 Guide plate 611 Guide surface 62 Support rib 63 Guide plate 64 Guide member 65 Guide member 66 Guide member 70 Airflow outflow part 71 Exhaust pipe part 72 Exhaust flange A Powder processing device CL Powder processing System Ft filter device Bw blower

Claims (9)

With a cylindrical housing that extends in the vertical direction,
A raw material supply unit that supplies raw materials into the housing,
A first rotating body arranged under the raw material supply unit and rotating around a central axis extending in the vertical direction,
A crushing member arranged on the radial outer edge of the first rotating body to pulverize the raw material into powder or granular material, and a crushing member.
A swirling airflow generating portion that is arranged above the first rotating body in the housing and generates an airflow in the swirling direction in the housing,
An airflow inflow portion arranged under the rotating body of the housing to allow airflow to flow into the housing, and an airflow inflow portion.
An airflow outflow portion that allows the airflow to flow out from the upper part of the housing is provided.
The inside of the housing is provided with a guide portion having a guide surface that faces the swirling airflow generating portion in the radial direction and has a guide surface whose front side in the rotational direction of the swirling airflow generating portion is located inward in the radial direction as compared with the rear side. Huh,
The swirling airflow generating portion includes a second rotating body that rotates around a central axis, and a plurality of blades that are erected radially around the peripheral portion of the second rotating body.
The surface of the guide surface extending in the circumferential direction from the front end portion in the rotation direction of the second rotating body is a powder processing apparatus located radially outside the swirling airflow generating portion. The housing comprises a tubular housing cylinder extending along the central axis.
The powder processing apparatus according to claim 1, wherein at least one of the guide portions extends radially inward from the housing cylinder portion. The upper end of the housing is provided with a housing top plate that extends in a direction orthogonal to the central axis.
The powder processing apparatus according to claim 1 or 2 , wherein at least one of the guide portions extends downward from the lower surface of the housing top plate portion. The powder processing apparatus according to any one of claims 1 to 3 , wherein the guide portion has a plate shape. The powder processing apparatus according to any one of claims 1 to 4 , wherein the guide surface is a curved surface in which an intermediate portion in the circumferential direction bulges in the radial direction. The powder processing apparatus according to any one of claims 1 to 5 , wherein the guide surface is located on the front side in the rotation direction of the swirling airflow generating portion with respect to the lower side on the upper side. The powder processing apparatus according to any one of claims 1 to 6 is provided.
An airflow drying device that allows hot air to flow in from the airflow inflow section. The powder processing apparatus according to any one of claims 1 to 6 is provided.
Inside the housing, the powder or granular material is classified and
A classification device provided with a collecting portion outside the airflow outflow portion for collecting powders and particles having an outer diameter contained in the airflow discharged from the airflow outflow portion within a predetermined range. The powder processing apparatus according to any one of claims 1 to 6 is provided.
The housing is a spheroidizing device provided with a granule taking-out portion for taking out spherical granules formed in the housing to the outside.

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