KR102559996B1 - Powder processing device - Google Patents

Abstract

In order to achieve a low flow rate of air flow and miniaturization of powder or granular material with a simple configuration, a powder processing apparatus includes a cylindrical housing body, a raw material supply unit, a first rotating body rotating around a central axis, a crushing member for pulverizing raw materials into powder or granular bodies, a second rotating body rotating around the central axis, a plurality of blades radially arranged on one side of an end portion in the vertical direction of the second rotating body, and an air flow inlet disposed below the rotating body to introduce air flow into the housing body; An airflow outlet for discharging an airflow containing powder or granular material from the top of the housing body, and a guide surface that faces the second rotating body in the radial direction and the front side in the rotational direction of the second rotating body is located radially inward compared to the rear side.

Description

Powder processing device

The present invention relates to a powder processing device for generating powder or granular material having a predetermined particle size by pulverizing a lumpy raw material.

A conventional pulverizer is disclosed in Japanese Laid-Open Patent Publication No. 2001-259451. This pulverization device includes a pulverization rotor rotatably installed inside the pulverization chamber, a liner disposed with a gap between the outer circumferential portion of the pulverization rotor, a classifying rotor for discharging materials having a predetermined particle size or less to the outside, a circulation passage for downward guiding raw materials not discharged from the classifying rotor, and blades protruding inward from the inner surface of the pulverizing chamber to collide the raw materials and suppressing the raw materials not discharged from the pulverizing rotor from turning along the inner surface of the pulverizing chamber.

In this pulverizer, the charged raw material is pulverized by a pulverizing rotor and a liner. Then, the pulverized raw material is moved upward by the air flow guided inside, and centrifugal force is applied by the classifying rotor. Raw materials having a particle size smaller than a predetermined particle size at which the inward force due to the air flow is greater than the centrifugal force are discharged to the outside. Raw materials that are not discharged to the outside, that is, raw materials with a particle size larger than a predetermined particle size, flow in the circumferential direction along the crushing chamber, collide with the blades, fall, and are crushed again with the crushing rotor and the liner. In this way, by providing the blades, pulsation of the grinding rotor is prevented and the grinding rotor can be stably driven without a large amount of raw material falling on the grinding rotor at once.

JP 2001-259451 A

However, in the pulverizer of Japanese Laid-Open Patent Publication No. 2001-259451, the airflow generated by the classifying rotor also collides with the blades. The airflow that collided with the wing flows in the vertical direction. At this time, since the airflow flowing downward collides with the airflow flowing toward the classifying rotor from the gap between the pulverization rotor and the liner, the flow velocity of the airflow flowing toward the classification rotor, ie, energy, is weakened. Therefore, in the pulverizer of Japanese Laid-Open Patent Publication No. 2001-259451, it is necessary to set the flow rate of the airflow flowing toward the classifying rotor to a flow rate that can flow upward even when the airflow colliding with the blades is blown out. And the particle size of the powder or granular material classified by the classification rotor is in inverse proportion to the rotational speed of the classification rotor, and is proportional to the square root of the flow rate of the airflow flowing through the classification rotor. In the pulverizer of Japanese Laid-open Patent Publication No. 2001-259451, since it is difficult to reduce the flow rate of the airflow flowing through the classifying rotor, it is difficult to make the powder or granular material to be classified smaller than a certain particle size.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a powder processing device capable of reducing the flow rate of air flow and miniaturizing powder or granular material while having a simple configuration.

In order to achieve the above object, a powder processing apparatus according to the present invention includes a tubular housing body extending in a vertical direction, a raw material supply unit for supplying raw materials into the housing body, a first rotating body disposed below the raw material supply unit and rotating around a central axis extending in the vertical direction, a crushing member disposed at an outer edge in a radial direction of the first rotating body and pulverizing the raw material into powder or granular bodies, and disposed above the first rotating body in the housing body in a swirling direction within the housing body. A swirling airflow generator for generating airflow; an airflow inlet portion disposed below the rotating body of the housing body and allowing airflow to flow into the housing body; and an airflow outlet portion for outflowing the airflow from an upper portion of the housing body, wherein the housing body is provided with a guide portion having a guide surface that faces the swirling airflow generator in a radial direction and the front side of the swirling airflow generator in the rotational direction is located radially inward compared to the rearward side of the swirling airflow generator.

According to this configuration, force directed inward in the radial direction is applied to the powder or granular material turning inside the housing body by the guide surface. Therefore, even if the flow rate of the air flow flowing in from the air flow inlet is reduced, it is possible to impart a force that presses the granular material inward in the radial direction. This makes it possible to reduce the flow rate of the air flow flowing in from the air flow inlet. Moreover, since the flow rate of the air flow can be reduced, the particle size of the powder or granular material discharged from the air flow outlet can be reduced, that is, miniaturization is possible. Further, by reducing the flow rate of the air flow, the device that generates the air flow can be downsized, and the entire device can be downsized. In addition, by suppressing the flow rate of the airflow to a low level, power consumption can be suppressed and power saving can be achieved.

In the above configuration, the swirling airflow generating unit may include a second rotational body rotating around a central axis, and a plurality of blades installed radially upright on the circumference of the second rotational body. By configuring in this way, it is possible to perform classification of powder or granular material with a simple structure.

In the above configuration, a surface of the guide surface extending in the circumferential direction from the front end of the swirling air flow generating unit in the rotational direction is located radially outward from the swirling air generating unit. With this configuration, the air flow guided by the guide surface is less likely to interfere with the centrifugal force applied to the powder or grain from the swirling air flow generating unit. Moreover, it can suppress that a granular material collides with a swirling airflow generating part.

In the above configuration, the housing body includes a tubular housing cylinder extending along the central axis, and at least one of the guide portions extends radially inward from the housing cylinder. With this configuration, it is possible to securely fix the guide portion.

In the above configuration, the housing body has a housing upper plate portion extending in a direction orthogonal to a central axis at an upper portion in a vertical direction, and at least one of the guide portions extends downward from a lower surface of the housing upper plate portion. With this configuration, it is possible to securely fix the guide portion. In addition, since the guide portion can be taken out together with the housing top plate portion, maintenance is easy.

In the above configuration, the guide portion is plate-shaped.

In the above configuration, the guide surface is a curved surface in which the middle portion in the circumferential direction is swollen in the radial direction.

In the above configuration, the upper side of the guide surface is located forward in the direction of rotation of the swirling air flow generating unit relative to the lower side.

ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide a powder processing device that has a simple configuration and is capable of reducing the flow rate of air flow and miniaturizing powder or grain.

1 is a cross-sectional view of a powder processing device according to the present invention.
2 is a plan view of a crushing unit.
FIG. 3 is a cross-sectional view taken along line III-III of the crushing unit shown in FIG. 2 .
4 is a plan view of a swirling airflow generating unit and a guiding unit.
5 is a cross-sectional view showing another attachment method of the guide plate.
6 is a plan view showing another example of a guide unit used in the powder processing apparatus according to the present invention.
7 is a plan view showing another example of a guide unit.
8 is a schematic layout view of an example of a powder processing system according to the present invention.
Fig. 9 is a cross-sectional view of a conventional powder processing device used in a comparative example test.
10 is a graph showing the results of Test 1.
11 is a graph showing the results of Test 2.
12 is a graph showing the time until the grinding unit returns to the idle state after the supply of raw materials is stopped.
13 is a graph showing grinding efficiency.
14 is a graph showing the content rate of fine powder contained in the produced powder or grain.
15 is a graph showing grinding efficiency.

A powder processing device according to the present invention will be described with reference to the drawings.

<1. Configuration of powder processing equipment>

1 is a cross-sectional view of a powder processing device according to the present invention. The powder processing device A crushes the material in the form of a lump into powder or granular material. As shown in FIG. 1 , the powder processing device A includes a housing body 10, a raw material supply unit 20, a driving unit 30, a grinding unit 40, a swirling air current generating unit 50, a guide unit 60, and an air flow outlet unit 70. In addition, the direction in which the central axis C1 extends is referred to as a vertical direction. The direction orthogonal to the vertical direction is called the radial direction, the direction toward the center is called the inward direction, and the direction away from the center is called the outer direction. Further, a direction along a circumference centered on the central axis C1 is referred to as a circumferential direction.

<1.1 Configuration of housing body 10>

The housing body 10 includes a housing 11, a shaft holding portion 12, a raw material accommodating hole 13, an airflow inlet portion 14, a lower 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 tube portion 112 , a flange portion 113 , and a housing top plate portion 114 . The bottom portion of the housing 111 has a disk shape extending outward from the center in the radial direction. The housing 11 is fixed to a pedestal or the like not shown so that the housing bottom 111 is horizontal. The housing tube portion 112 is a tube shape extending upward along the central axis C1 from the outer edge of the housing bottom portion 111 . The housing tube portion 112 has a cylindrical shape centered on the central axis C1.

The flange portion 113 is disposed on the upper end of the housing cylinder portion 112 and extends outward in the radial direction. The flange portion 113 and the housing cylinder portion 112 are integrally molded bodies. That is, the housing bottom part 111, the housing cylinder part 112, and the flange part 113 are integrally molded bodies of metal. Moreover, although stainless steel is mentioned as a metal, for example, it is not limited to this.

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

Further, in a state in which the opening of the housing tube 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 tube portion 112 and the housing top plate portion 114 are securely fixed and sealed so that air flow does not leak through the gap. In addition, although fixation with a screw or the like may be performed at one location, it is preferable to fix at a plurality of locations in order to securely perform fixation and sealing. Moreover, you may arrange a gasket, packing, etc. and improve airtightness.

A through hole 115 penetrating vertically is formed in the central portion of the bottom portion 111 of the housing. A first shaft 31 and a second shaft 32 of the drive unit 30 pass through the through hole 115 . In addition, a discharge hole 116 penetrating vertically is provided in the central portion of the upper plate portion 114 of the housing.

<1.1.2 Configuration of shaft holding unit 12>

As shown in FIG. 1 , the shaft holding portion 12 is disposed in the central portion of the bottom portion 111 of the housing and has a cylindrical shape extending vertically. The center of the axis holding portion 12 coincides with the central axis C1. The shaft holding part 12 is fixed to the bottom part 111 of the housing with a fixing tool such as a screw.

At the upper end of the shaft holding portion 12, a sealing portion (here, a labyrinth seal) is constituted. In this way, the inflow of the airflow containing the powder or grain 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 storage hole 13>

The raw material accommodating hole 13 receives the raw material in the form of a lump supplied from the raw material supply unit 20 into the housing tube portion 112 , that is, the inside of the housing body 10 . As shown in FIG. 1 , the raw material storage hole 13 is a through hole formed in the housing cylindrical portion 112 and penetrating in the radial direction. The raw material accommodating hole 13 is disposed above the pulverizer 40 disposed inside the housing cylinder 112 .

<1.1.4 Configuration of Air Flow Inlet 14>

In the air flow inlet 14, air flow flowing from the outside to the inside of the housing tube portion 112 is supplied. As shown in FIG. 1 , the airflow inlet portion 14 is a through hole provided in the housing cylinder portion 112 and penetrating in the radial direction. The airflow inlet 14 is disposed lower than the crushing unit 40 .

<1.1.5 Configuration of lower cover 15>

The lower cover 15 is disposed lower than the crushing portion 40 inside the housing cylinder portion 112 . The lower cover 15 has an annular shape. The lower cover 15 and the first rotating body 41 oppose each other with a gap between the top and the bottom. Then, the air flow is introduced into the gap between the surface of the lower cover 15 and the lower surface of the first rotating body 41 of the crushing unit 40 . The powder or granular material pulverized in the pulverizer 40 is transported upward and inward by this air flow. Therefore, the airflow supplied from the airflow inflow part 14 is called a conveyance airflow which conveys 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 tubular body, and a part thereof is inserted into the inside of the housing cylinder 112 from the raw material accommodating hole 13 and fixed thereto. Inside the raw material supply pipe 21, a screw conveyor 22 is rotatably disposed. The screw conveyor 22 moves the raw material in the form of lumps along the raw material supply pipe 21 by rotating. Raw material in the form of lumps moved by the screw conveyor 22 is put into the inside of the housing cylinder 112 from the raw material storage hole 13 . Moreover, you may employ conveyance methods other than a screw conveyor.

<1.3 Configuration of drive unit 30>

The driving unit 30 drives the crushing unit 40 and the swirling airflow generating unit 50 . As shown in FIG. 1 , the driving 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 the first shaft 31>

The first shaft 31 is tubular. At the upper end of the first shaft 31, the first rotating body 41 is fixed. The 1st shaft 31 is rotatably supported via the bearing (not shown) arrange|positioned inside the shaft holding part 12. 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 through the through hole 115 of the housing bottom 111 and protrudes downward from the housing bottom 111 . At the lower end of the first shaft 31, a first pulley 311 is fixed to the first shaft 31 while being prevented from rotating. As a fixing method of the 1st pulley 311, although press fitting, welding, adhesion etc. are mentioned, for example, it is not limited to these. Further, in order to prevent rotation reliably, a key and a key groove may be employed. The cross-sectional shape of the first shaft 31 may be made non-circular to prevent rotation.

A first belt 331 is wound around the first pulley 311 . Rotational force from a motor (not shown) is transmitted through 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 has a cylindrical shape and is disposed 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 part 12 .

The lower end of the second shaft 32 protrudes downward than the lower end of the first shaft 31 . Further, a second pulley 321 is fixed to a portion of the second shaft 32 protruding downward from the lower end of the first shaft 31 while being prevented from rotating. As a fixing method of the 2nd pulley 321, although press fitting, welding, adhesion etc. are mentioned, for example, it is not limited to these. Further, in order to prevent rotation reliably, a key and a key groove may be employed. Alternatively, the cross-sectional shape of the second shaft 32 may be made non-circular to prevent rotation.

A second belt 332 is wound around the second pulley 321 . Rotational force from a motor (not shown) is transmitted through 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.

In order to enable the first pulley 311 and the second pulley 321 to rotate at different rotation speeds, driving force may be transmitted from different motors. Moreover, it is possible to rotate the 1st pulley 311 and the 2nd pulley 321 at different rotational speeds using a common motor by using a speed reducer. Here, the different number of rotations includes the case where the rotation direction is the same, and also the case where the rotation direction is different.

<1.4 Configuration of crushing unit 40>

The grinding unit 40 is disposed lower than the raw material supply unit 20 . Then, the pulverizer 40 pulverizes the raw material in the form of a lump supplied from the raw material supply unit 20 into powder or granular material. Here, details of the grinding unit 40 will be described with reference to new drawings. 2 is a plan view of a crushing unit. FIG. 3 is a cross-sectional view taken along line III-III of the crushing unit shown in FIG. 2 . As shown in FIGS. 1 to 3 , the grinding unit 40 is disposed inside the housing cylinder 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. A shaft fixing hole 411 penetrating vertically is provided at the center of the first rotating body 41 . The shaft fixing hole 411 is fixed while the first shaft 31 is prevented from rotating. Moreover, the fixing of the 1st shaft 31 and the shaft fixing hole 411 is press-fitting, for example. In addition, fixing methods that can be fixed other than screw fixing welding, bonding, etc. can be widely employed. Alternatively, it may be securely prevented from rotating using a keyway and a key, or may be prevented from rotating by making the cross-sectional shape of the first shaft 31 a shape other than circular.

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

<1.4.2 Configuration of hammer 42>

The hammer 42 is an example of a crushing member. The hammer 42 includes a hammer base 421, an elevated portion 422, and a grinding blade 423. The hammer base 421 has a flat plate shape and is inserted into the hammer attachment part 412 . And, the hammer base 421 is fixed to the 1st rotating body 41 with the screw 40a, for example (refer FIG. 2, FIG. 3). Moreover, welding, adhesion, etc. may be sufficient as a fixing method.

The raised portion 422 protrudes integrally 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 attachment part 412, the raised part 422 rises upward. Then, the grinding blade 423 is disposed outside the raised portion 422 in the radial direction. The grinding blade 423 has a plurality of irregularities extending vertically. Moreover, the unevenness may extend parallel to 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. 3, the liner 43 is annular. The inner surface of the liner 43 faces the outer surface of the hammer 42 with a gap in the radial direction. The liner 43 includes a plurality of liner tips 431 , and the liner tips 431 are juxtaposed in contact with each other in the circumferential direction along the inner circumferential surface of the housing tube portion 112 . As a result, the liner 43 has an inner circumferential surface facing the hammer 42 formed in a polygonal annular shape. The liner tip 431 may be fixed to the housing cylinder 112 with, for example, a screw. The liner tip 431 has a grinding blade 432 having irregularities formed on its inner surface. Like the grinding blades 423 of the hammer 42, the grinding blades 432 may be concavo-convex extending vertically. Further, the grinding blade 432 may be formed by intersecting concavo-convex grooves, and the convex portion may be formed in a polygonal shape such as a square or an equilateral triangle. Moreover, you may arrange a two-dimensional array of fin-shaped convex parts.

As the first rotating body 41 rotates, the grinding blade 423 of the hammer 42 and the grinding blade 432 of the liner tip 431 move relatively in the circumferential direction. The crushing blade 423 and the crushing blade 432 crush the raw material in the form of lumps when the first rotating body 41 rotates at high speed. Therefore, at least the grinding blade 423 of the hammer 42 and at least the grinding blade 432 of the liner tip 431 are made of ceramic (alumina, zirconia, etc.), tungsten carbide, cemented carbide, tool steel, etc., which have high strength and hardness and excellent wear resistance. Moreover, you may form the whole hammer 42 with these materials. In addition, a material with high abrasion resistance is an example, and is not limited to these.

In addition, the surface of the liner tip 431 on which the grinding blade 432 is formed has a flat shape. Therefore, it is easy to manufacture the liner tip 431 compared to a configuration in which the grinding blade 432 is installed on a curved surface. Also, by changing the number of liner tips 431, it is possible to change the inner diameter of the liner 43 within a certain range. Therefore, it is possible to share the liner tip 431 with respect to the liners 43 of different sizes. In addition, 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 into a complex shape, such as ceramic. This makes it possible to lower the cost required for manufacturing the powder processing device A. Alternatively, a structure in which grinding blades 432 are formed on the inner surface of an annular liner 43 may be used.

Although omitted in this embodiment, an upper surface plate may be attached to the upper surface of the first rotating body 41 . The upper face plate is provided to suppress damage and wear of the first rotating body 41, the hammer 42, the screw 40a, and the like due to the collision of the raw material injected from the raw material accommodating hole 13. In addition, as the upper face plate, it is possible to constitute with a material having excellent wear resistance.

<1.5 Configuration of swirling airflow generating unit 50>

The swirling airflow generating unit 50 is disposed above the crushing unit 40 inside the housing body 10 . That is, the discharge hole 116 is formed above the swirling air flow generating part 50 . By rotating, the swirling airflow generating unit 50 generates a swirling airflow inside the housing body 10 . Then, the swirling air flow generating unit 50 applies a centrifugal force to the granular material by generating the swirling air current. The details of the swirling air flow generation unit 50 will be described with reference to new drawings. 4 is a plan view of a swirling airflow generating unit and a guiding unit. 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 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 prevented from rotating. The center of the second rotating body 51 and the second shaft 32 overlaps the central axis C1. In addition, fixation of the second shaft 32 may be performed by press-fitting into a through hole (not shown), or screwing, welding, bonding, or the like may be employed. Further, rotation prevention may be performed using a key and a keyway. As a result, when the second shaft 32 rotates, the second rotating body 51, that is, the swirling airflow generating unit 50 rotates around the central axis C1.

<1.5.2 Configuration of the blade 52>

On the surface of the second rotating body 51, radially extending, a plurality of blades 52 are fixed at regular intervals in the circumferential direction. The plurality of blades may be inserted into the concavo-convex groove formed on the upper surface of the second rotating body 51, for example, and then fixed by welding, bonding, or the like. The upper side of the blade 52 fixed to the upper surface of the second rotating body 51 extends outward. That is, when the swirling airflow generator 50 rotates, the part through which the outer edge of the upper end of the blade 52 passes becomes the outermost part in the passage area of the blade 52.

The blade 52 has a surface orthogonal to the turning direction of the swirling air flow generator 50 . When the swirling airflow generating unit 50 rotates, an airflow flowing in the circumferential direction is generated inside the housing body 10 . As shown in FIG. 4, the swirling airflow generation part 50 rotates in the counterclockwise rotation direction Rd in planar view. Due to the rotation of the swirling airflow generator 50, an airflow (hereinafter referred to as a swirling airflow) is generated along the housing cylinder 112 inside the housing body 10, that is, the housing cylinder 112, in the counterclockwise rotational direction Rd. Incidentally, as will be described in detail later, the powder or granular material is sorted (hereinafter referred to as classification) according to the size of the particles by the swirling air current generated by the swirling air flow 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 disposed 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, six) guide plates 61 are arranged at equal intervals in the circumferential direction inside the housing tube portion 112. The guide plate 61 is a rectangular plate, and the guide plate 61 extends vertically. And the guide plate 61 is equipped with the guide surface 611 which opposes the swirling air flow generation part 50 in the radial direction. As shown in FIG. 1 , the lower end of the guide surface 611 extends to the same or almost the same position as the lower end of the blade 52 of the swirling air flow generator 50 .

As shown in FIG. 4, the guide plate 61 is fixed to the inner surface of the housing tube portion 112 so that the front side of the guide surface 611 in the direction of rotation of the swirling air flow generator 50, that is, the second rotating body 51, is inward compared to the rear side. Moreover, although welding, adhesion, etc. are mentioned as a fixing method of the guide plate 61, it is not limited to these, A structure etc. which insert and fix into the groove formed in the housing cylinder part 112 may be used. A fixing method capable of securely fixing the guide plate 61 can be widely adopted.

As shown in FIG. 4 , a surface 612 extending along the circumferential direction from the front-end part of the swirling air flow generator 50 of the guide surface 611 is located outside the area through which the blade 52 of the swirling air flow generator 50 passes. The guide surface 611 guides the airflow generated by the swirling airflow generating unit 50 inward so that it is not blown directly to the swirling airflow generating unit 50 . In this way, the powder or granular material turning by the swirling airflow is guided inward while suppressing collision 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 opposite to the guide surface 611 of the guide plate 61 and to the inner surface of the housing tube portion 112 . The support rib 62 is fixing the guide plate 61 . By providing the support rib 62, deflection at the time of blowing air flow to the guide plate 61 is suppressed, and the guide plate 61 guides the swirling air flow inward.

In this embodiment, one support rib 62 is provided in the upper and lower center of the guide plate 61 . However, a plurality of support ribs 62 may be provided. Moreover, you may be provided with the support rib 62 which supports the whole guide plate 61.

<1.6.3 About another example of the guide>

Another example of the guide unit 60 will be described. 5 is a cross-sectional view showing another attachment method of the guide plate. As shown in FIG. 5 , the guide plate 61 may be fixed to the lower surface of the upper plate portion 114 of the housing. In FIG. 5 , the guide plate 61 is fixed to the housing upper plate portion 114 by screwing, but other than screwing, welding or welding may be employed. 5, it may be a guide plate 61a that is directly attached to and fixed to the lower surface of the housing upper plate 114, or a guide plate 61b formed on the lower surface of the housing upper plate 114 and inserted into a concave portion that is recessed upward and fixed. With this configuration, since the guide plates 61a and 6lb can be taken out to the outside by removing the housing upper plate portion 114, maintenance of the guide plates 61a and 6lb is easy. Further, when attaching the guide plate to the housing upper plate portion 114, the guide plate may have a shape that is difficult to obstruct during opening and closing of the housing upper plate portion 114. Further, the housing top plate portion 114 may be attached to the flange portion 113 without interposing a hinge therebetween.

6 is a plan view showing another example of a guide unit 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 also becomes a curved surface. Therefore, the guide plate 63 is arranged so that the surface 632 extending along the circumferential direction from the front end of the rotational direction of the second rotating body 51 of the guide surface 631 is outside the area through which the blade 52 of the swirling air flow generator 50 passes. In this way, by providing the curved guide surface 631, it is possible to smoothly guide the swirling air flow. Moreover, although the guide surface 631 is an outwardly convex curved surface, it is not limited to this and may be an inwardly convex curved surface. Depending on the flow velocity of the swirling air flow, the viscosity of the air flow, and the like, a shape in which vortices are less likely to occur can be widely adopted.

Further, guide members 64, 65, and 66 as shown in FIG. 7 may be provided. 7 is a plan view showing another example of a guide unit. As shown in Fig. 7, as the guide member 64, not a flat guide plate, but a guide member 64 protruding in the radial direction may be used. At this time, the surface of the guide surface 641 of the guide member 64 extending the front end of the rotational direction of the second rotating body 51 is outside the area through which the blade 52 of the swirling air flow generator 50 passes. Also, like the guide member 65, the guide surface 651 may be long, or like the guide member 66, the guide surface 661 may be curved. The guide members 64, 65 and 66 may be integrally formed with the housing 11. Further, guide members 64, 65, and 66 manufactured as separate members may be fixed inside the housing 11. Further, the surfaces 642, 652, 662 extending the front end of the guide surfaces 641, 651, 661 in the direction of rotation of the second rotating body 51 are outside the area through which the blade 52 of the swirling air flow generator 50 passes.

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 to the lower end. 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 rotational direction of the first rotating body 41 relative to the lower side. Thereby, the swirling air flow can be smoothly guided inward.

<1.7 Configuration of Air Flow Outlet 70>

The air flow outlet 70 discharges the air flow (air) introduced from the air flow inlet 14 to the outside. As shown in FIG. 1 , the air flow outlet 70 is attached to the surface of the housing top plate 114 . The air flow outlet 70 includes an exhaust cylinder 71 and an exhaust flange 72 . The exhaust tube portion 71 has a cylindrical shape and communicates with the exhaust hole 116 formed in the center of the housing top plate portion 114 . Then, the air inside the housing 11 flows into the exhaust cylinder 71 through the exhaust hole 116 .

The exhaust flange 72 may be disposed on the upper surface of the housing top plate portion 114 via a gasket (not shown). Then, the exhaust flange 72 is fixed to the housing top plate 114 with, for example, screws. This improves the airtightness between the housing top plate portion 114 and the exhaust pipe portion 71, and suppresses air flow leakage. Instead of the gasket, an O-ring or the like may be used. Alternatively, a concave portion may be formed on one side of the air flow 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 structure.

<2. About the operation of powder processing equipment>

The powder processing device A according to the present invention has the structure shown above. Next, a powder processing system using the powder processing device A will be described, and operation of the powder processing device included in the powder processing system will be described. 8 is a schematic layout view of an example of a 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 device A is fixed to the horizontal surface of the mount Ca with screws (not shown) or the like. Then, the air flow outflow part 70 of the powder processing device A and the inflow part 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 boundary portion Ft2, an inlet portion Ft3, an outlet portion Ft4, a filter medium Ft5, and an air outlet Ft6. In the filter device Ft, a boundary portion Ft2 divides the interior of the housing Ft1 into upper and lower portions. And a plurality of through holes are formed in the boundary portion Ft2. Below the boundary portion Ft2 of the housing Ft1, a cylindrical filter medium Ft5 extending downward while surrounding the periphery of the through hole of the boundary portion Ft2 is disposed.

The airflow from the powder processing device A flows into the inside of the housing Ft1 through the inflow part Ft3, passes through the filter medium Ft5, and flows out to the outside through the outflow part Ft4. At this time, powder or grain 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, so that the powder or granular material collected by the filter medium Ft5 is dropped downward.

An air 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 ejection port Ft6. Moreover, in the powder processing system CL, the powder or granular material taken out from the outlet Ft6 is a powder or granular material after classification, ie, a manufactured product.

Outflow part Ft4 of filter device Ft is connected to blower Bw via piping. The blower Bw generates negative pressure in the pipe connected to the outlet Ft4. By generating this negative pressure, an air current toward the blower Bw is generated in the filter device Ft, the powder processing device A, and the piping connecting them. In addition, in the powder processing device A, air flow flows in from the air flow inlet 14 due to this negative pressure. In addition, a separate blower (not shown) may be provided outside the air flow inlet portion 14 to forcefully introduce the generated air flow.

The operation of the powder processing device A will be described. In the powder processing device A, raw material in the form of lumps is supplied from the raw material supply unit 20 while 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 onto the first rotating body 41 of the crushing unit 40 . The raw material is pulverized into powder or granular material by the pulverizing blade 423 of the hammer 42 and the pulverizing blade 432 of the liner 43 .

In the powder processing device A, air (air flow) flows into the inside of the housing 11 from the air flow inlet 14 as described above. The air flow introduced from the air flow inlet 14 flows outward in the radial direction from the gap between the first rotating body 41 and the lower cover 15, and flows upward along the housing cylinder 112 between the first rotating body 41 and the liner 43. The air flow outlet is the air flow outlet 70 . Therefore, the airflow flowing out from between the first rotating body 41 and the liner 43 is directed upward and inward. Further, when the airflow passes between the first rotary body 41 and the liner 43, it moves together with the pulverized powder or granular material. That is, the powder or granular material pulverized by the pulverizer 40 is conveyed upwards and inward by the conveying air current.

In the upper part of the housing 11, a swirling air current is generated by the swirling air flow generator 50. The conveying air flow flowing in from the air flow inlet 14 merges with the swirling air flow. At this time, two forces, an inward force (F1) due to the conveyance airflow and an outward force (F2) due to the swirling airflow, act on the powder or grain contained in the conveyance airflow. The force F1 changes according to the flow rate (flow rate) of the conveying air flow, and the larger the conveying air flow, the greater the force F1. In addition, the force F2 is changed by the flow rate (flow rate) of the swirling airflow, that is, the rotational speed of the swirling airflow generating unit 50, and the higher the rotational speed of the swirling airflow generating unit 50, the greater the force F2.

From the above, the particle size of the powder or granular material transported together with the air flow discharged from the air flow outlet 70 among the powder or granular materials transported by the conveying air stream is determined by the flow rate of the conveying air stream and the rotational speed of the swirling air flow generating section 50. More specifically, the medium diameter D ₅₀ of the powder or granular material discharged from the air flow outlet 70 is proportional to the square root of the flow rate of the conveying air flow and inversely proportional to the rotational speed of the swirling air flow generating portion 50 . In the powder processing device A, by adjusting the flow rate of the conveying air flow and the rotational speed of the swirling air flow generating unit 50, the particle size of the powder or granular material discharged from the air flow outlet unit 70, that is, to be classified can be adjusted to the determined particle size. In addition, the medium diameter D ₅₀ is a particle size at which the number of powder or granular materials having a diameter smaller than the particle size is equal to the number of powder or granular materials having a larger diameter when arranging the powder or granular material in order of particle size.

In addition, the powder or granular material that is not discharged from the airflow outlet 70 by classification has a larger particle size than the determined particle size. Such granular material is extruded outward by the swirling air flow, contacts the inner surface of the housing cylinder 112, and then moves downward along the inner surface of the housing cylinder 112. Then, after being pulverized again by the pulverizing blade 423 of the hammer 42 and the pulverizing blade 432 of the liner 43, it is conveyed upward again by the conveying air current.

In this way, by repeating pulverization by the hammer 42 and liner 43, conveyance by the conveying air flow, and classification by the swirling air flow, powder or granular material obtained by pulverizing the raw material to a particle size equal to or smaller than the determined particle size is generated. Moreover, the produced|generated granular material is collected and taken out by the filter device Ft.

In the powder processing apparatus A according to the present invention, a guide plate 61 is disposed inside the housing 11 . The guide surface 611 of the guide plate 61 guides the swirling air flow inward. By this operation, the swirling airflow is directed inward. The force F1 due to the swirling air flow can be smaller than when the guide plate 61 is not disposed. Therefore, it is possible to lower the flow rate of the conveying air flow and the rotational speed of the swirling air flow generating unit 50 in order to obtain a predetermined particle size. In other words, since the flow rate of the conveying air flow can be suppressed to a small level, miniaturization of the powder or granular material becomes possible. In addition, by lowering the flow rate of conveying air flow and the number of revolutions of the swirling air flow generation unit 50, power consumption can be reduced, that is, energy saving is possible.

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

It is also possible to make a so-called airflow drying device, which removes moisture from the powder or granular material pulverized by the hammer 42 and the liner 43, by introducing high-temperature, low-humidity, that is, high-temperature dry air from the airflow inlet 14.

<2.1 About other examples of powder processing equipment>

In the powder processing device, the particle diameter of the powder or granular material moving inward can be adjusted using the swirling airflow generated by the swirling airflow generating unit 50 and the airflow conveyed by the conveying airflow. Using this, grinding is repeated between the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43 while discharging powder or granular material having a particle size of less than a certain level, thereby generating powder or granular material with a constant particle size and few sharp points, that is, close to a sphere shape (called spheronization). Then, a blow-out port (not shown) is provided in the housing tube portion 112 of the powder processing device A, and a spherical powder or granular material can be obtained by taking it out through the blow-out port.

In this way, in the powder processing device A, since the swirling air flow is directed inward on the guide surface 611, the powder or granular material can be conveyed inward even if the flow rate of the conveying air flow is low. Even if the flow rate of the conveying air stream is low, powder or grain is unlikely to remain inside the housing 11 . As a result, grinding is repeated with the grinding blade 423 of the hammer 42 and the grinding blade 432 of the liner 43, and excessive grinding, which is excessive grinding, can be suppressed, and the amount of fine powder generated can be suppressed.

<3. About 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 device P was used. Fig. 9 is a cross-sectional view of a conventional powder processing device used in a comparative example test.

The powder processing device P shown in FIG. 9 has substantially the same configuration as the powder processing device A shown in FIG. 1 except that the inner cylinder 81 and the vertical blades 82 are provided instead of the guide plate 61. Therefore, in the powder processing device P, substantially the same parts as those of the powder processing device A are given the same reference numerals, and detailed descriptions of the same parts are omitted. In Fig. 9, codes of parts not directly related to the features of the present invention are also omitted.

As shown in FIG. 9 , the powder processing device P has an inner cylinder 81 inside the housing cylinder 112 . The inner cylinder 81 has a cylindrical shape that surrounds the outer side of the swirling air flow generating unit 50 . And the vertical wing 82 is a flat plate, and connects the outer surface of the inner cylinder 81 and the inner surface of the housing cylinder part 112. A plurality of vertical blades 82 (for example, six) are provided and arranged along the radial direction.

In the powder processing device P, the powder or granular material transported by the swirling airflow flows in the circumferential direction along the housing tube portion 112 and collides with the vertical blades 82 . And, it falls downwards. Then, the fallen powder or granular material is pulverized in the pulverizer 40 again. The powder processing device P of the comparative example has such a configuration.

The operation of the powder processing device P will be described. In the powder processing device P, as in the powder processing device 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 pulverizing blade 423 of the hammer 42 and the pulverizing blade 432 of the liner 43 . Then, the pulverized raw material is conveyed by the conveying air flow, and passes between the inner circumference of the housing cylinder 112 and the outer periphery of the inner cylinder 81 . After that, the powder or granular material is classified in the swirling air flow generating unit 50 . Then, the powder or granular material smaller than the determined particle diameter passes through the gap between the blades 52 and is discharged from the discharge hole 116 to the outside. In addition, powder or granular material larger than the determined particle size moves down the inside of the inner cylinder 81 and falls onto the first rotating body 41 . Then, the fallen powder or granular material is again pulverized into finer powder or granular material by the grinding blade 423 of the hammer 42 and the grinding blade 432 of the liner 43. In the powder processing device 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, test results using the powder processing device (A) of the present invention are taken as examples, and test results performed using the conventional powder processing device (P) are used as comparative examples. The outer diameter of the outer side of the hammer 42 of the crushing part 40 is taken as the outer diameter of the hammer. All of Examples and Comparative Examples were tested under the same conditions. The conditions of the test were as follows. In addition, a description is given for each evaluation of the part where the condition is different for each evaluation. In the graphs used for the description below, examples are shown with squares and comparative examples are shown with triangles.

Shape of hammer grinding blade: fluted

Hammer outer diameter: 318.1 mm

Number of hammers: 12

Rotational speed of grinding unit: 7000 rpm

Rotational speed of the swirling airflow generator: 2000 rpm to 7000 rpm

Grinding raw material: heavy calcium carbonate (particle size about 1 mm)

<3.2 Evaluation 1>

In evaluation 1, test 1 and test 2 were performed with the operating conditions of powder processing apparatus A and powder processing apparatus P set as above, and the flow rate of conveying airflow in each powder processing apparatus was changed. The flow rate of the conveying air flow in each test is as follows.

test 1

Return air flow rate: standard flow rate

test 2

Return air flow rate: 1/3 of the standard flow rate

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

As shown in FIG. 10, when the flow rate of the conveying air flow is high (standard flow rate), there is little difference in the pulverization efficiency between Examples and Comparative Examples. Further, as shown in FIG. 11 , when the flow rate of the conveying air stream is small (1/3 of the standard flow rate), the pulverization efficiency of Examples is higher than that of Comparative Examples. That is, it was found that the powder processing device A of the present invention has a higher grinding efficiency than the conventional powder processing device P when the flow rate of the conveying air stream is small.

<3.3 Evaluation 2>

Next, in both Examples and Comparative Examples, the flow rate of the conveying air flow was set to 1/3.75 of the standard flow rate, and the time from stopping the supply of raw materials to the no-load state, that is, to returning to idle, was compared. The result is shown in FIG. 12. 12 is a graph showing the time until the grinding unit returns to the idle state after the supply of raw materials is stopped.

In the graph of Fig. 12, the vertical axis represents the time from when the supply of raw materials is stopped until the load of the grinding unit 40 returns to the minimum, that is, to the idle state. In addition, the horizontal axis is the medium diameter _D50 of the produced powder or grain. The time 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 idle state is shorter in Examples than in Comparative Examples when the medium diameter D ₅₀ is the same. That is, it was found that, when the flow rate of the conveying air flow was small, the powder processing apparatus A took a shorter processing time than the powder processing apparatus P to obtain powder or granular material having a determined particle diameter by pulverizing the raw material. From this, when the flow rate of the conveying air stream is small, the powder processing device A of the present invention can shorten the tact time of the treatment compared to the conventional powder processing device P. It can be seen.

<3.4 Evaluation 3>

Next, the raw material was changed from ground calcium carbonate to scaly graphite (media diameter D ₅₀ was 85 μm). Further, as the crushing blade 432 of the liner 43, a liner with corner grooves in which the grooves are perpendicular to each other and the convex portion has a rectangular shape is used. The rotational speed of the grinding unit 40 is 6800 rpm in both Examples and Comparative Examples, and the rotational speed of the swirling air flow generating unit 50 is 3000rpm and 7000rpm in both Examples and Comparative Examples. The flow rate of the conveying air stream was set to 1/3 of the standard flow rate in both Examples and Comparative Examples. The test results are shown in FIG. 13 . 13 is a graph showing grinding efficiency. In the graph of Fig. 13, the vertical axis is the grinding efficiency, and the horizontal axis is the medium diameter D ₅₀ .

Even if the raw material is changed from ground calcium carbonate to scaly graphite, when the flow rate of the conveying air stream is small, the grinding efficiency of the powder processing device A according to the present invention is found to be higher than the grinding efficiency of the conventional powder processing device P.

<3.5 Evaluation 4>

In evaluation 4, the test was conducted using polystyrene as the raw material. In the case of using a material that is difficult to crack, such as polystyrene, if the flow rate of the conveying airflow is low, in the conventional powder processing device P, the fluctuation of the crushing load becomes large, and stable operation cannot be performed. From this, it was found that the powder processing device A according to the present invention has higher operational stability at low air volume than the conventional powder processing device P. In other words, it was found that the powder processing apparatus A according to the present invention is capable of lower air volume than the conventional powder processing apparatus P.

<3.6 Evaluation 5>

Next, in evaluation 5, a test was conducted using a raw material as a flake-shaped powder coating (□5 mm, thickness 1 mm). Then, the content (fine fraction) of the fine powder (particle size less than 9.25 µm) contained in the powder or granular material discharged from the airflow outlet 70 was obtained as a volume ratio. Test conditions are the same as test 2 of evaluation 1. The results are shown in FIG. 14 . 14 is a graph showing the content rate of fine powder contained in the produced powder or grain. In Fig. 14, the vertical axis is the differential fraction, and the horizontal axis is the medium diameter _D50 .

In the case of producing a powder or granular material with a medium diameter D ₅₀ , the powder processing apparatus (A) of the present invention has a lower fine fraction than the case of using a conventional powder processing apparatus (P). That is, when generating powder or granular material having a determined 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 has less waste than the conventional powder processing apparatus P, and the powder processing efficiency is high.

<3.7 Evaluation 6>

In evaluation 6, a test was conducted using a powder processing device A1 and a powder processing device P1 having different sizes from those used in evaluations 1 to 5. The test conditions are as follows.

Shape of hammer grinding blade: fluted

Hammer outer diameter: 430.3 mm

Number of hammers: 32

Rotational speed of grinding unit: 6600 rpm

Rotational speed of swirling airflow generator: 3000 rpm to 5400 rpm

Grinding raw material: heavy calcium carbonate (particle size about 1 mm)

Liner grinding blade shape: triangular groove

Return air flow rate: 2/3 of the standard flow rate

Under the above conditions, tests were conducted using the powder processing device A1 according to the present invention and the conventional powder processing device P1, and the grinding efficiency was obtained. The test results are shown in FIG. 15 . 15 is a graph showing grinding efficiency. In Fig. 15, the vertical axis is the pulverization efficiency, and the horizontal axis is the medium diameter _D50 .

As shown in Fig. 15, in the case of using the powder processing device A1 according to the present invention, the grinding efficiency is higher than in the case of using the conventional powder processing device P1. From this, even if the size of the powder processing device, the housing, the size of the crushing section, and the number of hammers are changed, it can be seen that the powder processing device according to the present invention having the guide surface has a higher grinding efficiency than the conventional powder processing device.

As described above, in the powder processing device according to the present invention, by providing a guide surface in the housing for guiding the swirling airflow generated inside the housing inward, the grinding efficiency is higher and the powder processing time can be shortened compared to the conventional powder processing device. In addition, the raw material required to obtain the powder or granular material having the determined particle diameter is smaller when using the powder processing apparatus according to the present invention than when using the conventional powder processing apparatus. Further, in the powder processing device A of the present invention, compared to the conventional powder processing device P, the flow rate of air flow introduced can be reduced, that is, the flow rate of the air flow can be reduced. In addition, from this, in the powder processing apparatus (A) of the present invention, compared to the conventional powder processing apparatus (P), it is possible to miniaturize the generated powder or granular material.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. In addition, various modifications can be made to the embodiments of the present invention without departing from the spirit of the present invention.

10: housing body 11: housing
111 housing bottom part 112 housing tube part
113: flange portion 114: housing upper plate portion
115: through hole 116: discharge hole
12: shaft holding part 13: raw material storage hole
14: air flow inlet 15: lower cover
20: raw material supply unit 30: driving unit
31: first shaft 311: first pulley
32: second shaft 321: second pulley
331: first belt 332: second belt
40: grinding unit 41: first rotating body
412: hammer attachment 42: hammer
423: grinding blade 43: liner
432: grinding blade 50: swirling air flow generating unit
51: second rotating body 52: blade
60: information unit 61: information board
62: support rib 63: guide plate
64: guide member 65: guide member
66: guide member 70: air flow outlet
71: exhaust tube portion 72: exhaust flange
A: powder handling device CL: powder handling system
Ft: filter unit Bw: blower

Claims (11)

As a powder processing device,
a tubular housing body extending in the vertical direction;
a raw material supply unit supplying raw materials into the housing body;
a first rotating body disposed below the raw material supply unit and rotating around a central axis extending in a vertical direction;
a pulverizing member disposed at an outer edge of the first rotating body in a radial direction to pulverize the raw material into powdery or granular material;
a swirling airflow generator disposed above the first rotational body in the housing body to generate airflow in a swirling direction by rotating around a central axis in the housing body;
an air flow inlet disposed below the rotating body of the housing body to introduce air flow into the housing body; and
Including an air flow outlet for flowing the air flow from the top of the housing body,
Inside the housing body, a guide portion having a guide surface opposite to the swirling air flow generating portion in the radial direction and located radially inward with respect to the front side of the swirling air flow generating portion in the rotational direction compared to the rear side,
A surface of the guide surface extending in the circumferential direction from a front-end part in the rotational direction of the swirling air flow generating portion is located radially outward from the swirling air generating portion. The powder processing apparatus according to claim 1, wherein the swirling airflow generating unit includes a second rotational body rotating around a central axis, and a plurality of blades installed radially upright on the circumference of the second rotational body. The method of claim 1, wherein the housing body has a tubular housing cylinder extending along the central axis,
At least one of the guide portions extends radially inward from the housing tube portion. The method of claim 1, wherein the upper end of the housing body is provided with a housing top plate extending in a direction perpendicular to the central axis,
At least one of the guide parts extends downward from the lower surface of the upper plate part of the housing. The method of claim 2, wherein the upper end of the housing body is provided with a housing top plate extending in a direction perpendicular to the central axis,
At least one of the guide parts extends downward from the lower surface of the upper plate part of the housing. The powder processing apparatus according to any one of claims 1 to 5, wherein the guide portion has a plate shape. The powder processing apparatus according to any one of claims 1 to 5, wherein the guide surface is a curved surface in which a middle portion in the circumferential direction is swollen in the radial direction. The powder processing apparatus according to any one of claims 1 to 5, wherein the guide surface is located forward in the direction of rotation of the swirling air flow generator with respect to the upper side of the guide surface. As an airflow drying device,
Including the powder processing device according to any one of claims 1 to 5,
An air flow drying device that introduces hot air from the air flow inlet. As a classifier,
Including the powder processing device according to any one of claims 1 to 5,
Classifying the powder or granular material inside the housing body,
The classification apparatus provided with the outside of the said air flow outflow part, the filter apparatus which collects the powder or granular material contained in the airflow discharged from the said air flow outflow part whose outer diameter falls within a predetermined range. As a spheronization device,
Including the powder processing device according to any one of claims 1 to 5,
The spheronizer according to claim 1, wherein the housing body has an outlet for taking out spherical powder or granular material formed in the housing body to the outside.