JP7224155B2 - Rotor for powder and granular material processing equipment, and powder and granular material processing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotor for a granular material processing apparatus and a granular material processing apparatus.

A main body of processing equipment that performs processing such as granulation, drying, and coating while fluidizing raw material powder, and a discharge that is connected to this main body of processing equipment and vacuum-sucks the processed product in a fluidized bed state and transports it to a product hopper. is known (for example, Patent Literature 1). In order to check the state of the apparatus, it is necessary to periodically perform maintenance on the above-described powdery and granular material processing apparatus. Prior to maintenance, it is necessary for the operator to disassemble the main body of the processing apparatus, piping, etc., and wash each part.

JP-A-7-289878

However, in the case of the conventional cleaning method as described above, it is necessary to remove the parts and clean each part, so there is a problem that the number of man-hours is large and the work efficiency is low. In particular, a processing apparatus that granulates raw material powder while rolling it with a rotor has a large number of parts, and the cleaning work is complicated.

An object of the present invention is to provide a rotor for a granular material processing apparatus and a granular material processing apparatus that can be washed efficiently.

A rotor for a powdery or granular material processing apparatus according to the present invention comprises a processing chamber, a discharge chamber adjacent to the processing chamber via a valve body and having a first connection port, and provided at the bottom of the processing chamber, a fluid distribution plate through which fluid can flow; an air supply chamber provided on the lower surface side of the fluid distribution plate and having a second connection port; one end of which is connected to the first connection port; A rotor for a granular material processing apparatus, which is rotatably provided on the upper surface side of the fluid distribution plate of the granular material processing apparatus including a fluid circulation path connected to a connection port, comprising: a rotating disk; a plurality of upper blades provided on a surface of a rotating disk facing the processing chamber; and a plurality of lower blades provided on a surface of the rotating disk facing the fluid distribution plate, wherein the plurality of lower surfaces The blade has a curved surface that is convexly curved in the direction of rotation.

A granular material processing apparatus according to the present invention includes the rotor for a granular material processing apparatus.

According to the present invention, the curved surface of the lower blade is convexly curved in the direction of rotation, and the centrifugal force that pushes the cleaning liquid in the radial direction can efficiently act on the cleaning liquid. Therefore, since the upward flow rising from the air supply chamber along the side wall of the processing chamber can be further accelerated by the lower blade, the flow velocity of the cleaning liquid passing through the fluid distribution plate is increased, and the powder processing apparatus can be operated more efficiently. can be washed.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the granular material processing apparatus which concerns on this embodiment. It is the perspective view seen from the top which shows the rotor which concerns on this embodiment. It is the perspective view seen from the bottom which shows the rotor which concerns on this embodiment. It is a bottom view which shows the rotor which concerns on this embodiment. FIG. 3 is a schematic diagram for explaining a cleaning method for the powdery or granular material processing apparatus according to the present embodiment; It is a schematic diagram showing a model used for simulation, FIG. 6A is an example, FIG. 6B is a comparative example. FIG. 4 is a side view for explaining a rotor used for simulation; It is a bottom view with which it uses for description of the rotor used for simulation, FIG. 8A is an Example, FIG. 8B is a comparative example. 9A is a contour diagram showing the velocity distribution of the cleaning liquid, and FIG. 9B is a vector diagram showing the flow of the cleaning liquid. FIG. 10A is a contour diagram showing the velocity distribution of the cleaning liquid, and FIG. 10B is a vector diagram showing the flow of the cleaning liquid. FIG. 11A is a photograph showing a fluid distribution plate after an actual machine test, and FIG. 11B is a comparative example.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(overall structure)
The powdery or granular material processing apparatus 10 shown in FIG. and a fluid circuit 22 . The granular material processing apparatus 10 introduces the fluidizing gas supplied to the air supply chamber 20 into the processing chamber 12, and performs granular material processing such as granulation, coating, mixing, drying, etc. in the processing chamber 12. , and the product after treatment can be removed from the discharge chamber 14 .

The processing chamber 12 is a cylindrical member having an inlet 24 at its upper end and a rotor 16 rotatably provided at its bottom. A discharge port 26 is formed through the sidewall 13 of the processing chamber 12 in the thickness direction. The discharge port 26 is opened and closed by a rotatably provided valve body 28 . The processing chamber 12 is connected to the discharge chamber 14 via a discharge port 26 and a valve body 28 . The discharge chamber 14 is provided with a first connection port 30 and communicates with the outside through the first connection port 30 .

The rotor 16 is rotatably provided on the upper surface side of the fluid distribution plate 18 . The rotor 16 includes a rotating disk, which is a hollow truncated conical cone portion 32 protruding upward, a plate-like annular plate portion 34 connected to the base of the cone portion 32, the cone portion 32 and the annular plate portion. and a lower surface portion 37 provided on the lower surface side of 34 . The rotor 16 is arranged such that the surface of the annular plate portion 34 is parallel to the XY plane. The annular plate portion 34 and the lower surface portion 37 in contact with the annular plate portion 34 are formed with a large number of holes (not shown) penetrating in the thickness direction. The annular plate portion 34 and the portion of the lower surface portion 37 in contact with the annular plate portion 34 are preferably formed of a punching metal having a plurality of holes with a hole diameter of 2 mm, for example. Granules and fluid (gas, liquid) flow from the lower surface side to the upper surface side through the holes.

A gap S is provided between the outer edge of the rotor 16 and the side wall 13 of the processing chamber 12 . The cone portion 32 is arranged so as to cover the upper end of the rotating shaft 36 , and the upper end of the cone portion 32 is fixed to the upper end of the rotating shaft 36 . The rotating shaft 36 is arranged in the center of the processing chamber 12 and parallel to the Z-axis. The lower surface portion 37 has a through hole 39 penetrating in the thickness direction in the center. A peripheral edge of the through hole 39 is connected to a proximal end of a sleeve 41 into which the rotating shaft 36 is inserted. The tip of the sleeve 41 is connected to the upper end of the cone portion 32 . The rotating shaft 36 extends downward through the through hole 39 . A seal portion 43 is provided between the rotating shaft 36 and the inner peripheral surface of the through hole 39 to prevent foreign matter and cleaning liquid from entering the space between the sleeve 41 and the rotating shaft 36 .

As shown in FIG. 2, the upper surface 35 of the annular plate portion 34 is provided with a plurality of (three in this drawing) upper surface blades 38 . The upper surface blades 38 are evenly arranged in the circumferential direction of the annular plate portion 34, and the front edge 45 on the front side in the rotational direction (the direction of the arrow in the figure) and the rear edge 47 on the rear side are straight and parallel to each other. , the rear edge 47 side is formed so that the height from the upper surface 35 is higher than the front edge 45 side, and the height gradually decreases toward the front edge 45 .

As shown in FIG. 3, the lower surface portion 37 is a disk-shaped member, and the rotating shaft 36 passes through a through hole 39 in the center. 40 are provided. The lower blades 40 are arranged radially around the rotation axis 36 . The lower surface blade 40 has a constant height from the surface 49 of the lower surface portion 37 from the center side inner end 51 of the lower surface portion 37 to the radially outer outer end 53 of the lower surface portion 37 . The number of lower blades 40 is preferably six or more. The inner edge 51 is the innermost edge or surface of the lower blade 40 . Outer edge 53 is the outermost side or surface of lower blade 40 .

As shown in FIG. 4, the lower blade 40 has a curved surface 42 that is convexly curved in the direction of rotation at the leading edge on the front side in the direction of rotation (the direction of the arrow in the figure). The radius of curvature of the curved surface 42 is preferably 350-450 mm, for example, when the radius of the lower surface portion 37 is 1100-1200 mm. The trailing edge on the rear side in the direction of rotation has a rear curved surface 55 with a larger radius of curvature than the curved surface 42 . When viewed from the bottom surface of the rotor 16 , the lower blade 40 has the largest circumferential length (width length) midway between the inner end 51 and the outer end 53 , and the width length increases toward the outer end 53 . It tapers and has a pointed shape. The position of the outer edge 53 of the lower surface blade 40 substantially coincides with the outer edge of the lower surface portion 37 . The linear length from the inner end 51 to the outer end 53 of the lower surface blade 40 is preferably greater than the radius of the lower surface portion 37 . The linear length from the inner end 51 to the outer end 53 of the lower surface blade 40 is preferably 50-80% of the radius of the lower surface portion 37 .

It is preferable that the outer end 53 of the lower surface blade 40 is arranged on the rear side in the rotational direction from an imaginary line passing through the center of the lower surface portion 37 and the inner end 51 and parallel to the XY plane. In the case of this drawing, the inner end 51 is the innermost surface of the lower blade 40 , and the imaginary line may pass through the plane forming the inner end 51 . The outer end 53 of the lower surface blade 40 overlaps a virtual line parallel to the XY plane passing through the center of the lower surface portion 37 and the inner end 51 of the adjacent lower surface blade 40 arranged rearward in the rotational direction or in the rotational direction. On the other hand, it is more preferable to be arranged on the rear side. In this figure, the outer edge 53 is the outermost side of the lower blade 40 . The lower surface blade 40 is preferably arranged outside the middle between the inner end 51 and the outer end 53 so that the imaginary line passing through the center of the lower surface portion 37 and the inner end 51 does not intersect the curved surface 42 .

As an example, a specific description will be made based on two adjacent lower surface blades 40, that is, a lower surface blade 40A and a lower surface blade 40B arranged behind the lower surface blade 40A in the rotational direction. An imaginary line passing through the inner end 51 of the lower blade 40A and the center of the lower surface portion 37 is L1, and an imaginary line passing through the inner end 51 of the lower surface blade 40B and the center of the lower surface portion 37 is L2. The outer ends 53 of the lower blades 40A are preferably arranged behind the imaginary line L1 in the rotational direction, and more preferably at a position overlapping the imaginary line L2 or on the rearward side in the rotational direction. The lower surface blade 40A is in contact with the virtual line L1 and the curved surface 42 only inside the middle between the inner end 51 and the outer end 53 .

The fluid distribution plate 18 (FIG. 1) is arranged at the bottom of the processing chamber 12 and below the Z-axis of the rotor 16 so that the powder particles do not pass through and the fluid (liquid, gas) passes through. It has innumerable circulation holes (not shown) of a possible size. The size of the circulation holes can be, for example, 100 to 150 μm. The fluid distribution plate 18 may be a wire mesh having a predetermined mesh as circulation holes, or a metal plate having holes of a predetermined size as circulation holes. A through hole 57 opening in the thickness direction is provided in the center of the fluid distribution plate 18 , and the rotary shaft 36 is inserted into the through hole 57 via a seal portion (not shown). A gap is formed between the Z-axis upper surface of the fluid distribution plate 18 and the lower blade 40 .

The air supply chamber 20 is provided below the Z-axis of the fluid distribution plate 18 . A base end of a cylindrical housing 46 is fixed to the bottom portion 44 of the air supply chamber 20 . The housing 46 supports the central portion of the rotary shaft 36 via a bearing 48 at its tip. Although not shown, the rotating shaft 36 is connected at its lower end to a drive motor via a pulley and a belt. When the rotational force of the drive motor is input through the belt and pulley, the rotating shaft 36 and the rotor 16 rotate together. A seal portion (not shown) is provided between the housing 46 and the bearing 48 to prevent entry of foreign matter and cleaning liquid into the bearing 48 .

A drain port 50 is provided in the bottom portion 44 of the air supply chamber 20 and communicates with the outside. A second connection port 52 is provided in the side wall 21 of the air supply chamber 20 and communicates with the outside through the second connection port 52 . The fluid circulation path 22 is connected to the second connection port 52 . The fluid circulation path 22 is a pipe having one end connected to the first connection port 30 and the other end connected to the second connection port 52 . Note that the other end of the fluid circulation path 22 is not connected to the second connection port 52 and the second connection port 52 is closed with a lid (not shown) while the powder is being processed. An air supply duct 54 is connected to the side wall 21 of the air supply chamber 20 . Fluidizing gas of a predetermined flow rate and temperature is supplied to the air supply chamber 20 via the air supply duct 54 .

The fluidizing gas supplied from the air supply duct 54 to the air supply chamber 20 passes through the fluid distribution plate 18 and passes through the gap S between the outer edge of the rotor 16 and the side wall 13 of the processing chamber 12, the lower surface portion 37 and the annular plate. It is introduced into the processing chamber 12 through the hole in the portion 34 . The granules, which are the raw materials introduced from the inlet 24, are blown up along the side wall 13 of the processing chamber 12 by the fluidized gas when they roll on the outer peripheral portion of the rotor 16 by the rotating rotor 16. , along the cone portion 32 and returning to the upper surface of the rotor 16 (arrow A1 in FIG. 1). As described above, the granular material processing apparatus 10 performs a predetermined treatment by rolling and circulating the granular material. The granular material processing apparatus 10 may supply liquid into the processing chamber 12 from a spray supply unit (not shown) as needed. The processed granular material (product) moves from the processing chamber 12 to the discharge chamber 14 through the discharge port 26 by rotating the valve body 28 to open the discharge port 26 . A transportation pipe (not shown) is connected to the first connection port 30, and the product is taken out of the discharge chamber 14 through the transportation pipe by gravity and centrifugal force due to the rotation of the rotor. In addition, the product may be taken out from the discharge chamber 14 by vacuum suction through the transportation pipe.

(Action and effect)
Next, with reference to FIG. 5, the cleaning method and effects of the granular material processing apparatus 10 will be described. Cleaning of the granular material processing apparatus 10 is performed without removing the rotor 16 and the fluid distribution plate 18 . First, the fluid circuit 22 connects the first connection port 30 and the second connection port 52 , and the discharge chamber 14 and the air supply chamber 20 are connected via the fluid circuit 22 . Also, the discharge port 26 is opened, and the processing chamber 12 and the discharge chamber 14 are communicated with each other. As described above, process chamber 12 and air supply chamber 20 are connected via exhaust chamber 14 and fluid circuit 22 . In this state, the cleaning liquid 56 is supplied from the inlet 24 to the processing chamber 12 . Cleaning liquid 56 fills process chamber 12 , exhaust chamber 14 , fluid circuit 22 , and air supply chamber 20 until the water level reaches the top of cone 32 . As the cleaning liquid 56, for example, warm water, an acid solution, an alkaline solution, a surfactant solution, or the like can be used. The air supply duct 54 is watertightly closed by an on-off valve (not shown).

After the cleaning liquid 56 is filled, the rotating shaft 36 is rotated to rotate the rotor 16 . As the rotor 16 rotates, the cleaning liquid 56 in the processing chamber 12 generates a rotating flow A2 that rotates horizontally about the rotating shaft 36 .

In addition, the cleaning liquid 56 between the lower surface portion 37 and the fluid distribution plate 18 is subjected to centrifugal force by the lower surface blade 40, passes through the fluid distribution plate 18 from the air supply chamber 20, passes through the gap S from the lower surface side of the rotor 16, and is processed. A series of ascending flows A3 rising along the side walls 13 of the chamber 12 are further accelerated. Due to the upward flow A3, the cleaning liquid 56 in the air supply chamber 20 passes through the fluid distribution plate 18, rises along the side wall 13 of the processing chamber 12, and returns from the central portion along the cone portion 32 to the upper surface of the rotor 16. give rise to The horizontal rotating flow A2 and the swirling flow A4 can remove dirt such as powder residue adhering to the inside of the fluid distribution plate 18, the rotor 16, and the processing chamber 12. FIG. The removed contaminants move to the side wall 13 of the processing chamber 12 due to the centrifugal force of the horizontal rotating flow A2 and eddy current A4.

Further, a pressure difference between the cleaning liquid 56 in the processing chamber 12 and the pressure of the cleaning liquid 56 in the air supply chamber 20 causes the cleaning liquid 56 in the processing chamber 12 to flow from the discharge port 26 through the discharge chamber 14 into the fluid circulation path. A recirculating flow is produced which flows into the air supply chamber 20 via 22 . As described above, the cleaning liquid 56 is returned to the processing chamber 12 on a path that sequentially passes through the processing chamber 12, the discharge chamber 14, the fluid circuit 22, the air supply chamber 20, the fluid distribution plate 18, and the rotor 16. FIG. The contaminants that have moved to the side wall 13 of the processing chamber 12 move from the processing chamber 12 to the air supply chamber 20 through the discharge port 26 on a circulating flow. At the stage when it has flowed into the air supply chamber 20 , the dirt 58 contained in the cleaning liquid 56 falls to the bottom 44 of the air supply chamber 20 due to gravity and is discharged to the outside through the drain port 50 .

As described above, the fluid distribution plate 18, the rotor 16, the processing chamber 12, the valve body 28, the discharge chamber 14, and the air supply chamber 20 are efficiently washed by the circulating flow. Further, the dirt 58 collected from the processing chamber 12, the valve body 28, the discharge chamber 14, the fluid distribution plate 18, and the rotor 16 is removed from the cleaning liquid 56 by being discharged from the drain port 50 to the outside. The plate 18 , rotor 16 , processing chamber 12 , valve body 28 and discharge chamber 14 can be prevented from being reattached with dirt 58 .

The curved surface 42 of the lower blade 40 is convexly curved in the direction of rotation, so that the cleaning liquid 56 between the lower surface portion 37 and the fluid distribution plate 18 is efficiently pushed out in the radial direction by centrifugal force. can work. The centrifugal force that the lower blade 40 exerts on the cleaning liquid 56 is greater than a straight blade without the curved surface 42 . Further, the flow velocity of the upward flow A3 generated by the centrifugal force exerted on the cleaning liquid 56 by the lower blade 40 is higher than that in the case where the rotating shaft 36 is provided with an auxiliary stirring blade, which will be described later.

Therefore, in the granular material processing apparatus 10, the upward flow A3 rising along the side wall 13 of the processing chamber 12 can be further accelerated by the lower blade 40, so that the flow velocity of the cleaning liquid 56 passing through the fluid distribution plate 18 is increased. Fluid distribution plate 18 and rotor 16 can be cleaned more efficiently. By arranging the outer end of the lower blade 40 on the rear side with respect to the rotational direction from the imaginary line passing through the center of the lower surface portion 37 and the inner end 51, the centrifugal force acting on the cleaning liquid 56 can be increased. .

Furthermore, the greater centrifugal force pushing the cleaning liquid 56 radially increases the flow rate of the cleaning liquid 56 flowing into the drain chamber 14 through the outlet 26, so that the drain chamber 14 can also be cleaned more efficiently. Furthermore, by further accelerating the ascending flow A3, the pressure difference between the cleaning liquid 56 in the processing chamber 12 and the air supply chamber 20 increases, and the flow velocity of the circulating flow increases. Therefore, in the granular material processing apparatus 10, the processing chamber 12, the valve body 28, the discharge chamber 14, the air supply chamber 20, the fluid distribution plate 18, and the rotor 16 can be cleaned without removing the parts.

In addition, since the powdery or granular material processing apparatus 10 has a larger centrifugal force for pushing out the cleaning liquid 56 in the radial direction than when the auxiliary stirring blade is provided, the auxiliary stirring blade can be omitted and the number of parts can be reduced. By reducing the number of parts, the number of fine dents can also be reduced, so foreign matter can be prevented from remaining, and sanitation can be further improved.

The present invention is not limited to the above embodiments, and can be appropriately modified within the scope of the present invention. For example, after cleaning with the cleaning liquid 56, the cleaning liquid 56 may be discharged, cleaning water may be filled into the processing chamber 12 and the air supply chamber 20, and rinsing may be performed with the cleaning water.

(inspection)
The cleaning effect of the lower blade was verified by simulation. The simulation was performed using numerical analysis software (Flow Simulation, Solidworks 2014) for the models shown in FIGS. 6A and 6B. FIG. 6A is a model corresponding to this embodiment, and includes a rotor 16 between the processing chamber 110 and the air supply chamber 112 . The processing chamber 110 and the air supply chamber 112 are communicated by a fluid circulation path 114 . FIG. 6B, in which the same components as in FIG. 6A are denoted by the same reference numerals, is a model corresponding to the comparative example, which includes a conventional rotor 100 and the auxiliary stirring blades 102 described above. Auxiliary stirring blade 102 is fixed to rotating shaft 36 , arranged in air supply chamber 112 , and rotates integrally with rotor 100 .

For the above model, the number of grids is about 500000, the boundary conditions are that the upper surface of the processing chamber 110 is the liquid surface, the environmental pressure is 101325 Pa (atmospheric pressure), the rotor speed is 30 rpm (-3.14 rad/s), and the analysis convergence condition ( A simulation was performed with a constant flow rate on the surface of the rotating area, and a constant flow velocity on the upper end surface of the air supply chamber 112 .

The common configuration of rotors 16, 100 will now be described with reference to FIG. The rotors 16 and 100 had an outer diameter of 1140 mm, a height of the cone portion 32 of 260 mm, a length of the upper blades 38 of 280 mm, and a height of the upper blades 38 of 35 mm.

As shown in FIG. 8A, eight lower surface blades 40 of the rotor 16 used in the model corresponding to this embodiment have a length of 520 mm, a height of 45 mm, a radius of curvature of the curved surface 42 of 350 mm, and a radius of curvature of the rear curved surface 55. The radius of curvature was set to 450 mm.

As shown in FIG. 8B, the lower blades 104 of the rotor used in the model corresponding to the comparative example were straight, arranged evenly in the circumferential direction, and had a length of 300 mm and a height of 45 mm. The number of auxiliary stirring blades 102 was two, and the length was 400 mm, the height was 100 mm, and the thickness was 6 mm.

The simulation results are shown in FIGS. 9A, 9B and 10A, 10B. 9A and 10A show the distribution of the flow velocity with light and dark colors, and the darker the flow velocity, the higher the flow velocity. , and the length of the arrow indicates the flow rate.

As shown in FIGS. 9A and 9B, in the model corresponding to this embodiment, it was confirmed that the flow velocity is high in the region on the lower surface side of the rotor 16 and in the wide region near the side surface of the air supply chamber 112 . This is presumably because the centrifugal force applied to the cleaning liquid on the lower surface side of the rotor by the lower surface blade increased. Furthermore, the flow rate of the cleaning liquid flowing into the air supply chamber 112 from the fluid circulation path 114 is large. This is probably because the pressure difference between the processing chamber 110 and the air supply chamber 112 increased due to the increased flow velocity in the processing chamber 110 . It can also be seen that a vortex is generated in the processing chamber 110, and the cleaning liquid is circulating at high speed.

On the other hand, as shown in FIGS. 10A and 10B, in the model corresponding to the comparative example, the high flow velocity range is limited to narrow regions near the outer edge of the rotor 100 and the outer edge of the auxiliary stirring blade 102 . Also, in the model corresponding to the comparative example, the flow rate of the cleaning liquid flowing into the air supply chamber 112 from the fluid circulation path 114 is small. Moreover, almost no flow of the cleaning liquid is observed particularly near the center of the processing chamber 110 .

From this, the rotor 16 in the present embodiment is provided with the lower surface blades 40 having the curved surface 42, so that the flow velocity on the lower surface of the rotor 16 is increased compared to the comparative example, and a high-speed upward flow is obtained, resulting in fluid circulation. It has been found that the flow rate of cleaning liquid flowing through channel 114 is increased. Further, in the case of the present embodiment, since the cleaning liquid circulates at high speed in the processing chamber 110, it can be said that dirt on the upper surface of the rotor 16 and the sidewall of the processing chamber 110 can be cleaned more reliably.

In the case of the model corresponding to this embodiment, the flow rate of the cleaning liquid in the fluid circulation path 114 was improved by 13% compared to the model corresponding to the comparative example. In addition, the flow velocity on the lower surface of the rotor 16 was improved by 17% on average compared to the model corresponding to the comparative example. From this, it was confirmed that by providing the lower surface blades 40 on the lower surface of the rotor 16, a higher cleaning effect can be obtained than the model corresponding to the comparative example in which the conventional rotor 100 is further provided with the auxiliary stirring blades 102. .

When the flow rate and flow velocity of the cleaning liquid were measured in an actual machine corresponding to the model of the comparative example, the results were the same as the simulation results. From this, it can be said that the result of the said simulation is engineering-appropriate.

As described above, the powder and granular material processing apparatus can increase the flow velocity of the cleaning liquid by providing the lower surface blade on the lower surface of the rotor, so that the dirt can be efficiently removed and/or dissolved from the machine, and the machine can be cleaned efficiently. It can be said.

A rotor corresponding to this embodiment was actually produced, and a cleaning test was conducted to verify the cleaning effect. The dimensions of each part of the rotor were the same as in the simulation. 5 kg of powder (manufactured by Meiji Co., Ltd., product name: Sabath Weight Down) was sprayed around the rotor and the fluid distribution plate, and a cleaning liquid (alkaline detergent, mass concentration of 1%, liquid temperature of 60 ° C) was applied to the surface of the liquid. was filled to the extent that it reached the top of the rotor. In this state, the rotor was rotated at 30 rpm and held for 15 minutes. After completion of the cleaning, the cleaning liquid was discharged from the discharge port, and the residue of powder particles on the rotor and the fluid distribution plate was confirmed.

The results are shown in FIGS. 11A and 11B. When the rotor corresponding to this embodiment was subjected to the cleaning process, no residue of powder was found on the rotor and the fluid distribution plate 18 . On the other hand, in the case of the configuration provided with the rotor and auxiliary stirring blades corresponding to the comparative example, a large number of residues 58 of powder particles were found on the fluid distribution plate 18 . From this result, it was confirmed in the actual machine that by providing the lower surface blades on the lower surface of the rotor, a higher cleaning effect can be obtained than the configuration in which the conventional rotor is further provided with the auxiliary stirring blades.

Reference Signs List 10 powder processing apparatus 12 processing chamber 16 rotor 18 fluid distribution plate 20 air supply chamber 22 fluid circulation path 30 first connection port 32 cone portion (rotating disk)
34 Annular plate (rotating disk)
37 lower surface (rotating disk)
38 upper blade 40 lower blade 42 curved surface 52 second connection port

Claims (6)

a processing chamber;
a discharge chamber having a first connection port adjacent to the processing chamber via a valve body;
a fluid distribution plate provided at the bottom of the processing chamber through which fluid can flow;
an air supply chamber having a second connection port provided on the lower surface side of the fluid distribution plate;
One end is connected to the first connection port, and the other end is connected to the second connection port. A rotor for a powder and granular material processing apparatus,
a rotating disk having a hollow cone portion projecting upward, an annular plate portion connected to the base of the cone portion, and a lower surface portion provided on the lower surface side of the cone portion and the annular plate portion;
a plurality of upper blades provided on the surface of the annular plate facing the processing chamber;
a plurality of lower surface blades provided on the surface of the lower surface portion facing the fluid distribution plate;
The plurality of lower surface blades have curved surfaces that are convexly curved in the direction of rotation, and extend from a portion of the lower surface portion in contact with the annular plate portion to a portion of the lower surface portion below the cone portion. extended
Rotor for powder processing equipment. 2. The rotor for a powder and granular material processing apparatus according to claim 1, wherein the position of the outer end of said lower surface blade coincides with the outer edge of said lower surface portion . 3. The rotor for a powdery or granular material processing apparatus according to claim 1, wherein the plurality of lower surface blades is six or more. 4. The powder and granular material processing apparatus rotor according to claim 1, wherein the plurality of lower blades are evenly arranged in the circumferential direction of the rotating disk. A granular material processing apparatus comprising the rotor for a granular material processing apparatus according to any one of claims 1 to 4. 6. The granular material processing apparatus according to claim 5, having a rotating shaft fixed to said rotating disc, wherein said rotating shaft is not provided with an auxiliary stirring blade.

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