JP3338523B2 - Granule processing equipment and granule storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the drying, stirring and mixing or cooling of various powders such as synthetic resin pulverized materials, synthetic resin regenerated pellets, fluff materials, granular foods, cereals, metals and the like. The present invention relates to an apparatus for treating a granular material applied to perform the above-mentioned treatment, and an improvement in a storage tank for the granular material applied to the apparatus.

[0002]

2. Description of the Related Art Conventionally, there is an apparatus as shown in FIG. 10 for drying a granular material such as a synthetic resin pellet. In this conventional device, hot air is supplied from a large number of ventilation holes 41 of a perforated plate 40 provided at the bottom of the housing tank 1e in a state in which the granular material 90 is housed in the housing tank 1e, and is blown up by the hot air. This is a device for drying the powder 90 while stirring it by the action. A discharge port 5e that is opened and closed by a lid 7e is provided on the bottom side of the storage tank 1e, and is configured such that the powder 90 that has been dried can be quantitatively discharged from the discharge port 5e.

Further, in the prior art, not only hot air is used for drying the powdery granules 90 but also, for example, as shown in FIG. 11, the stirring blades 4 supported by the rotating shaft 45 in the storage tank 1e.
6 is proposed, in which the stirring operation of the stirring blades 46 is increased to increase the stirring efficiency of the granular material 90 to thereby increase the drying efficiency by hot air.

[0004]

In the above-mentioned conventional apparatus, the discharge port 5e is merely provided at an appropriate position near the bottom of the storage tank 1e. 5e is directly acted on. Therefore, in such a state, when the lid 7e closes the discharge port 5e, the powder 9
0 becomes very large, it is difficult to smoothly close the discharge port 5e, and it is difficult to discharge the powder 90 at a constant rate.

Conventionally, hot air is supplied from the position of the porous plate 40 provided at the bottom of the storage tank 1e into the storage tank 1e. 90 is easily clogged, and it is difficult to supply a sufficient amount of hot air into the storage tank 1e necessary for the drying process. Furthermore, conventionally, even if a suitable amount of hot air could be supplied into the storage tank 1e, the hot air gradually rises from the bottom side of the storage tank 1e through the gap between the granular materials. Not too much, powder 90
There was also a drawback that the drying efficiency of this was poor.

In the apparatus provided with the stirring blades 46 shown in FIG. 11, the efficiency of agitation of the granular material 90 can be increased. Therefore, the drying processing efficiency can be increased as compared with the apparatus shown in FIG. Is possible. However, in the apparatus shown in FIG. 11, for example, as shown in FIG. 12, in the related art, a stirring blade 46 having a circular cross section is used. The fact is that a symmetrical shape is used. In such a configuration, when the stirring blade 46 rotates in the direction of the arrow a, the lower surface 46a of the stirring blade 46 pushes the powder or granular material 90 located below the center line CL downward as indicated by the arrow b. Acts to lower. Therefore, due to the pressing force of the granular material 90, the granular material pressure received on the bottom side of the storage tank 1e further increases, and this is the discharge port 5e.
Makes it more difficult to close the lid with the lid 7e.
The problem is that the clogging of the granular material 90 into the ventilation hole 41 is further promoted.

Further, in the conventional apparatus having the stirring blades 46, the rotating shaft 45 is provided vertically in the storage tank 1e. In such a structure, as shown in FIG.
In many cases, a void S in which the powder 90 does not exist is generated around the rotation shaft 45 that rotates while generating a slight shake. However, when such a gap S is generated,
A phenomenon occurs in which the powder particles 90 existing in the vicinity thereof (for example, the regions B1 and B2) sequentially fall in the voids S formed around the rotation shaft 45. In this case, the storage tank 1
The granular material 90 that is located on the upper side in e and has not been sufficiently dried yet falls and moves to the bottom side of the storage tank 1e before the other granular materials 90. Therefore, there is also a problem that the powder 90 in an insufficiently dry state is unduly discharged from the discharge port 5e. Conventionally, the above-mentioned difficulties have arisen not only in a drying apparatus using hot air, but also in a cooling apparatus for granular materials using cold air or the like, or a simple stirring and mixing apparatus for granular materials. .

[0008] The present invention has been proposed in view of the above points, and the opening and closing of the discharge port can be smoothly performed without being adversely affected by the weight of the granular material stored in the storage tank. The first object is to make it possible to discharge a fixed amount of granules. Further, a second object of the present invention is that a gas for processing powder or granular material applied to a drying process or the like cannot be appropriately supplied into a storage tank due to clogging of a gas supply port or the like. This is also to solve the problem, and to allow the gas for powder processing to efficiently act on the powder in the storage tank so that the desired processing operation can be performed efficiently.

[0009]

According to a first aspect of the present invention, there is provided a powdery or granular material treating apparatus according to the present invention, wherein at least a bottom is provided with a stirring blade.
A flat-bottomed storage tank for storing the powder and granules therein, at a position directly above a discharge port which is provided on the bottom side of a side peripheral wall portion of the storage tank and can be opened and closed by a lid, A chute plate for preventing the pressure of the granular material is provided.

The chute plate for preventing the pressure of the granular material in the structure of the first aspect is, as described in the second aspect, inclined downward from the position of the inner peripheral wall surface of the storage tank to the center side of the storage tank. It can be formed in a funnel shape protruding in a shape.

The present invention according to claims 3 to 10 has been proposed in order to achieve the second object. Of these, the present invention according to claims 3 to 8 has the following features. The present invention relates to a type of granular material processing apparatus for supplying a gas for granular material processing. In other words, the apparatus for treating a granular material according to the present invention according to claim 3 has a configuration in which the chute plate for preventing the granular material pressure formed in a predetermined funnel shape according to claim 2 is provided. A gas supply port is provided below the chute plate for supplying a gas for treating powder and granules into the storage tank. According to the present invention, the gas supply port is provided so as to inject the gas for processing the granular material in a direction along the inner peripheral wall surface of the storage tank. Claim 5
In the present invention described in the above, such a gas supply port is provided so as to inject a gas for powder and granular material processing in a direction opposite to the rotation direction of the stirring blade rotatably provided in the storage tank. . Further, in the present invention described in claim 6, the chute plate formed in a funnel shape for preventing the pressure of the granular material is formed as a porous plate having air permeability.

The present invention according to claim 7 is different from the configuration in which a gas supply port is provided below a chute plate for preventing pressure of a granular material, in order to supply a gas for processing a granular material into a storage tank. At least one gas supply port is provided at the bottom of the storage tank, and a partition plate that covers the upper side of the gas supply port and forms a horizontal gas supply opening is provided immediately above the gas supply port. Configuration. The present invention according to claim 8 provides:
The gas for powder processing supplied from the gas supply port into the storage tank is a pulsating wave.

The present invention according to claims 9 and 10 relates to a type of granular material processing apparatus provided with a stirring blade. Among them, the apparatus for treating a granular material according to the present invention according to claim 9 has an inclined surface having an elevation angle on at least the tip side of the upper surface of the stirring blade provided rotatably in the horizontal direction in the storage tank. In addition, the lower surface of the stirring blade is formed as a horizontal surface or an inclined surface having an elevation angle. The apparatus for treating a granular material according to the present invention as set forth in claim 10, wherein the granular material along the rotating shaft is provided on a rotating shaft for supporting a stirring blade provided in a storage tank along a vertical direction. This is a configuration in which at least one or more receiving plates for preventing the falling of the sheet are provided.

The invention of claim 11 relates to a storage tank of a flat bottom which is applied to the processing device of the granular material according to the present invention of claims 1 to 10 described above, the side peripheral wall surface of the container
Provided on the bottom side of the part to a position immediately above the discharge port which is opened and closed by a lid member is provided with a chute plate for preventing particulate material pressure.

[0015]

According to the first aspect of the present invention, the load of the granular material stored in the storage tank is set at a position immediately above the discharge port. It is received by the chute plate for preventing the pressure of the granular material provided, and it is avoided that the entire load of the granular material existing above the discharge port acts directly on the portion of the discharge port. Therefore, the resistance of the granular material when opening and closing the outlet with the lid can be reduced,
Since the opening / closing operation of the discharge port can be smoothly performed at a desired timing, it is possible to appropriately perform high-precision quantitative discharge of the granular material.

Further, according to the present invention described in claim 2,
When the chute plate for preventing the pressure of the granular material is formed in a predetermined funnel shape, it is possible to form a hollow zone in which the granular material is not filled in the entire peripheral area below the chute plate. . Therefore, it is possible to further completely prevent the load of the granular material from acting on the portion of the discharge port. In the funnel-shaped chute plate, it is possible to prevent a part of the powder and granules from being improperly stored and accumulated on the chute plate.

According to the third aspect of the present invention, since the gas supply port is provided at a position where the hollow zone below the chute plate for preventing the pressure of the granular material formed in a predetermined funnel shape is formed. It is possible to prevent the particles from entering the gas supply port and causing clogging. Therefore, the gas for powder processing can be supplied from the gas supply port only in a required air volume.

According to the fourth aspect of the present invention, since the gas for powder processing is injected and supplied in a direction along the inner peripheral wall of the storage tank, the gas for powder processing is powdered. At the position of the hollow zone formed below the chute plate for preventing the granular material pressure, a high-speed swirling flow is obtained. Therefore, the degree of contact between the powder and granules in contact with the swirling flow is increased, and the desired processing efficiency of the powder and granules such as drying efficiency or cooling efficiency is improved.

According to the fifth aspect of the present invention, since the gas for powder processing is injected in the direction opposite to the rotation direction of the stirring blade rotatably provided in the storage tank, The relative blowing speed of the gas for processing the powder with respect to the body is further increased, and the processing ability of the powder with the gas for processing the powder is further improved.

According to the present invention, a part of the gas for treating the granular material supplied from the gas supply port provided below the chute plate for preventing the granular material pressure has air permeability. After passing through the chute plate for preventing the pressure of the granular material provided, it is also supplied to the upper side of the storage tank. Therefore, it is possible to enhance the diffusion efficiency of the gas for processing the powder and granular material in the storage tank, and also to improve the processing efficiency of the powder and granular material.

In the present invention according to claim 7, a gas supply port for supplying a gas for treating a granular material into the storage tank is provided at the bottom of the storage tank. By being covered with the partition plate, it is possible to eliminate the possibility that the granular material directly enters the gas supply port from above and causes clogging. Then, from the lateral gas supply opening formed by the partition plate, a sufficient amount of gas for powder processing can be supplied into the storage tank, and a desired gas such as drying processing of powder can be supplied. Appropriate processing can be achieved.

According to the eighth aspect of the present invention, since the gas for processing the granular material supplied from the gas supply port into the storage tank is a pulsating wave, the pulsating wave forcibly forces the granular material. Vibration can be imparted in an appropriate manner. As a result, the agitation efficiency can be enhanced by promoting the flow of the granules, and at the same time, the degree of contact of the gas for treating the granules with the agitated granules can be increased, Thereby, the processing efficiency of the granular material can be increased.

According to the ninth aspect of the present invention, at least the tip side of the upper surface of the stirring blade provided in the storage tank is an inclined surface with an elevation angle, so that when the stirring blade rotates in the horizontal direction, The particles in the storage tank are appropriately stirred and mixed while being pushed upward by the inclined surface having the elevation angle.
On the other hand, since the lower surface of the stirring blade is formed as a horizontal plane or an inclined surface of an elevation angle, when the stirring blade rotates, the lower surface of the stirring blade presses the powder or granular material in the storage tank downward. There is no. Therefore, it is possible to prevent the granular material in the storage tank from being pressed downward by the rotation operation of the stirring blade, thereby preventing an extra load from acting on the discharge port on the bottom side of the storage tank. Does not cause trouble.

According to the tenth aspect of the present invention, a void is formed around the rotating shaft supporting the stirring blade, and a part of the powdery material on the upper side of the storage tank falls along the void. Even if such a situation occurs, the granular material is received by the receiving plate provided on the rotating shaft, and further falling is prevented.
Therefore, it is also possible to prevent a case where a part of the granular material on the upper side of the storage tank is unduly dropped one after another to the bottom side of the storage tank and the granular material in the storage tank is agitated in an uneven state. .

According to the eleventh aspect of the present invention, the chute plate for preventing the pressure of the granular material is provided just above the discharge port which is provided on the bottom side of the storage tank and can be opened and closed by the lid. Further, similarly to the case of the first aspect, it is possible to prevent the load of the granular material from directly acting on the discharge port, and it is possible to smoothly open and close the discharge port by the lid.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a schematic sectional view showing an example of an apparatus A for treating a granular material according to the present invention. This processing device A
A storage tank 1 for storing a desired powder material 90, a chute plate 1 provided in the storage tank 1 for preventing pressure of the powder material.
0, a plurality of agitating blades 2 (2a to 2f), a motor M for applying a rotational force to a rotating shaft 11 supporting the agitating blades 2, and a hot air as a gas for processing particles in the storage tank 1. It is provided with a blower 3 and a heating device 4 for supplying.

Of the above, the storage tank 1 is formed in a predetermined hollow shape, and a discharge port 5 for discharging the granular material 90 to the outside is provided at a position near the bottom of the side peripheral wall portion 1a.
Is provided. The outlet 5 is provided with an air cylinder 6
It can be opened and closed freely by a lid 7 reciprocally driven by a suitable driving means such as. In addition, on the upper side of the storage tank 1, the storage tank 1
An inlet 8 for introducing the powder 90 into the inside, an exhaust port 9 for releasing the hot air supplied into the storage tank 1 to the outside, and the like are appropriately provided.

As shown in FIG. 2, for example, the chute plate 10 for preventing the pressure of the granular material is formed in a funnel shape having an inverted cone shape as a whole and accommodates an inclined surface portion 10a having an inverted cone shape. The container 1 is provided so as to protrude downward from the position of the inner peripheral wall portion 1 c with respect to the center side of the storage tank 1.
Note that a large number of ventilation holes 10b are provided in the inclined surface portion 10a. In addition, the flange 1 on the upper outer periphery of the chute plate 10
Reference numeral 0c denotes a portion used for fixing the chute plate 10 to the storage tank 1. The chute plate 10 is provided at a position near the bottom in the storage tank 1, and the discharge port 5 is located below the chute plate 10.

The stirring blades 2 (2a to 2f) are mounted on a rotating shaft 11 provided vertically at a central position in the storage tank 1 at appropriate vertical intervals. Of these, stirring blade 2
As shown in FIG. 4 (a), for example, the cross-sectional shape of each of a to 2e is formed in a hollow triangular shape. When viewed from above, an inclined surface 21a having an elevation angle θ1 (a state in which the height increases toward the rear side) is provided, and the lower surface portion 22 is formed as a horizontal plane. On the other hand, the stirring blades 2f located at the lowermost stage cause the powder particles 90 located at the bottom of the storage tank 1 to be discharged from the outlet 5
It also exerts the function of transferring to the position. As shown in FIG. 4B, the stirring blade 2f also has a lower surface 2
2A is formed as a horizontal plane, and its upper surface portion 20A is formed with an inclined surface 21A having an elevation angle θ2 when viewed from the front side in the rotational direction of rotation of the stirring blade 2, while the other stirring blades 2a to 2a are formed.
The inclined surface 21b having a dip like 2e is not formed.
However, all sectional shapes of these stirring blades 2a to 2f are
4 (a) and 4 (b), the lower surface portions 22 and 22A may not be formed in a horizontal plane, and the elevation angle may also be viewed from the rotational direction of the stirring blade 2. It is good also as a slope which becomes.

A rotating shaft 11 for supporting each stirring blade 2
Is provided with a plurality of disc-shaped receiving plates 12. If the diameter D of each receiving plate 12 is excessively large, the fluidity of the granular material 90 in the storage tank 1 is impaired. Therefore, the gap S (see below) of FIG. The diameter is set to be slightly larger than the diameter D1.
In the configuration shown in FIG. 1, the plurality of receiving plates 12 are provided corresponding to each of the stirring blades 2a to 2e. However, the present invention is not limited to this. 2e
May be provided at different positions at different pitches.

The heating device 4 generates hot air by heating the air exhausted and supplied from the blower 3, and a heater, a heat exchanger or the like is applied. It is configured to be injected and supplied into the storage tank 1 from a gas supply port 13 opened in 1a. Here, the gas supply port 13 is disposed below the chute plate 10, and hot air supplied from the gas supply port 13 into the storage tank 1 is stored in the storage tank 1 as shown by an arrow B in FIG. 1 is set so as to turn along the inner peripheral wall portion 1c, and the turning direction is considered to be opposite to the rotation direction a of the stirring blade 2.

Next, an example of use and operation of the apparatus A for treating a granular material having the above-described configuration will be described. First, as shown in FIG. 1, powder particles 90 (for example, regenerated pellets made of synthetic resin) to be dried are stored in the storage tank 1, and the pressure of the powder particles formed in a predetermined funnel shape is increased. Chute plate 10 for prevention
Below, a hollow zone B in which the granular material 90 is not filled is formed. This is attributable to the characteristic of the granular material that the granular material 90 guided by the chute plate 10 tends to be stabilized at a predetermined angle of repose α at a position below the chute plate 10. It is formed over the entire peripheral area along the inner peripheral wall 1c of the storage tank 1. Further, the hollow zone B is maintained even when the stirring blade 2 rotates and the granular material 90 is stirred.

Next, when hot air is supplied from the gas supply port 13 into the storage tank 1 with the rotation of the stirring blade 2, the hot air turns around the position of the hollow zone B at a high speed. Therefore, the powder 90 at the position in contact with the hollow zone B is heated and dried very efficiently. Further, as shown in FIG. 3, the flow direction (arrow B) of the swirling flow of the hot air is opposite to the rotation direction (arrow a) of the stirring blade 2, and this hot air is stirred by the stirring blade 2. The relative speed of contact with the granular material 90 is higher, and the drying efficiency of the granular material 90 is further improved. The chute plate 10 has a large number of air holes 1.
0b is provided, a part of the hot air passes through these ventilation holes 10b and also flows out to the upper side of the chute plate 10, and the drying of the powder 90 present above the chute plate 10 is promoted. You. The gas supply port 13 for injecting hot air
Is provided at a position facing the hollow zone B, there is no danger that the powder or granules 90 will flow into the gas supply port 13 unjustly and become clogged. It is possible to appropriately continue the supply of the hot air with the air volume.

On the other hand, when the rotating shaft 11 rotates in the storage tank 1 filled with the granular material 90, a phenomenon occurs in which the rotating shaft 11 pushes the surrounding granular material 90,
As shown in FIG. 5, a gap S is generated around the rotation shaft 11. The diameter D1 of the gap S increases as the lateral deflection of the rotating shaft 11 increases. When such a gap S is formed, a region beside the gap S, for example, the region E1,
In some cases, a phenomenon may occur in which the granular material 90a located at E2 drops downward along the gap S.
Since a is received by the receiving plate 12, it does not fall any further. Therefore, the granular material 90a that has not yet been sufficiently dried and is located at the top of the storage tank 1 flows toward the bottom side of the storage tank 1 earlier than the other powder particles 90 that have been input earlier. Falling is prevented.

The powder 90 dried with hot air while being stirred by the stirring blades 2 as described above is discharged from the outlet 5 after reaching the bottom of the storage tank 1. Is provided below the chute plate 10 forming the hollow zone B, so that the load of the granular material 90 existing above the outlet 5 does not directly act on the portion of the outlet 5. Therefore, not only when the lid 7 is retracted to open the discharge port 5 but also when the lid 7 is advanced to close the discharge port 5, the resistance of the powder particles 90 is very small. Can be smoothly opened and closed. As a result, the opening and closing timing of the discharge port 5 can be appropriately controlled, and the quantitative discharge of the powder 90 can be accurately performed. The powder particles 90 falling and flowing along the chute plate 10 are guided toward the center of the bottom portion 1b of the storage tank 1. The powder particles 90 are rotated by the stirring blade 2f located at the lowermost stage. As a result, it is swept to the discharge port 5 side. Therefore, even if the hollow zone B is formed at the position of the discharge port 5, it is possible to appropriately discharge the powder 90.

The drying process of the powder 90 by the hot air is performed while the powder 90 in the storage tank 1 is stirred by the stirring blade 2. Thus, each stirring blade 2
4A and 4B, as shown in FIGS.
2, 22A are formed as a horizontal plane or as an inclined surface of an elevation angle, so that a large downward pressing force does not act on the granular material 90 due to the rotating operation of the stirring blades 2. Therefore, the granular material 90 is not compressed downward and condensed by each stirring blade 2,
It becomes a state in which it easily flows in the storage tank 1, and the stirring efficiency is improved. Further, if the downward pressing force is reduced in this manner, the load acting on the discharge port 5 can be further reduced, which contributes to performing the opening and closing operation of the discharge port 5 more smoothly. In addition, since the inclined surfaces 21a and 21A of the elevation angle are formed on the upper surface portions 20 and 20A of the stirring blade 2, the granular material 90 is caused to flow upward by the inclined surfaces 21a and 21A, and the granular material 90 is formed. Can be appropriately performed.

[Second Embodiment] FIG. 6 is a schematic sectional view showing another example of the apparatus for treating a granular material Aa according to the present invention (the same parts as those in the first embodiment are denoted by the same reference numerals). This processing apparatus Aa is for introducing the hot air supplied from the blower 3 and the heating device 4 into the storage tank 1 to the bottom portion 1b of the storage tank 1 of the processing apparatus A for granular materials shown in the first embodiment. Nozzle 1
4 are connected. In the configuration shown in FIG. 6, the gas supply port 1 formed in the side peripheral wall portion 1a of the storage tank 1 is provided.
The hot air is supplied from the nozzle 3 as well.
When 4 is provided, it is not always necessary to supply hot air from the gas supply port 13.

As shown in FIG. 7, the nozzle 14 has a gas supply port 1 opening upward from the lower surface 1b of the storage tank 1.
5 at the position immediately above the gas supply port 1.
An inclined partition plate 16 is provided to cover the upper side of 5, and a horizontal gas supply opening 17 is formed by the inclined partition plate 16 to inject hot air in a substantially horizontal direction. As shown by arrow C in FIG. 8, the gas supply opening 17 is provided with a swirling flow in which hot air injected from the gas supply opening 17 is blown along the inner peripheral wall 1c of the storage tank 1. It is considered to become. The direction of rotation of the stirring blade 2f (arrow a)
The direction is set in the same direction as that for supplying hot air.

In the processing apparatus Aa for the granular material 90 having the above configuration, the upper side of the gas supply port 15 of the nozzle 14 is
By being covered with 6, the possibility that the powder 90 enters the gas supply port 15 is reduced, and the occurrence of undesired clogging is prevented. In particular, since the gas supply opening 17 in the horizontal direction is set to blow hot air in the same rotation direction as the stirring blade 2f, the powder 90 that is pushed by the stirring blade 2f is opened. Thus, the clogging of the portion can be prevented more completely. The hot air blown laterally from the gas supply opening 17 becomes a high-speed swirling flow at the position of the hollow zone B formed below the chute plate 10 for preventing the granular material pressure, and An efficient drying process is performed.

[Other Embodiments] In each of the above embodiments, the hot air is continuously supplied into the storage tank 1 by the blower 3 and the heating device 4, but the present invention is not limited to this. For example, as shown in FIG. 9A or 9B, a pulsating wave of hot air accompanied by a periodic pressure change may be supplied into the storage tank 1. When such pulsating waves of hot air are supplied into the storage tank 1, the pulsating waves impart forced vibration to the granular material 90, thereby increasing the stirring efficiency of the granular material 90. As a result, the drying process is performed. This is preferable because the efficiency can be increased.

Further, in each of the above-described embodiments, the case where the drying process of the granular material is performed is described as an example. However, the present invention is not limited to this. For example, the gas to be supplied into the storage tank 1 may be configured as cooling air so as to be configured as a cooling device for the granular material. Alternatively, another type of gas, such as nitrogen, may be supplied instead of air. It may be. Furthermore,
In the present invention, in addition to the processing such as drying and cooling, for example, a mixing processing apparatus for mixing a plurality of particles by stirring the particles may be configured.

Further, in the present invention, the chute plate for preventing the pressure of the granular material does not necessarily have to be formed in a predetermined funnel shape. May be provided above. In addition, in the present invention, the specific type of the granular material is not limited at all.

[0043]

As will be understood from the above description, the apparatus for treating a granular material according to any one of the first to tenth aspects and the eleventh aspect.
According to the powder / particle storage tank described in (1), the weight of the powder in the storage tank can be prevented from directly acting on the discharge port by the chute plate for preventing the pressure of the powder and granular material. The opening and closing operation of the outlet can be smoothly performed, and a special effect that the quantitative discharge of the granular material after the desired processing can be performed accurately and appropriately can be obtained.

In particular, according to the present invention as set forth in claim 2,
Forming a hollow zone in which no granular material is filled in the entire peripheral area below the chute plate for preventing particulate material pressure formed in a predetermined funnel shape, and the load of the granular material acting on the discharge port. Of the powder and granules stored in the storage tank while avoiding that some of the powder and granules are stored and accumulated on the chute plate. There is also obtained an advantage that the flow can be smoothly dropped.

According to the third aspect of the present invention, it is possible to prevent the particulates from unduly entering the gas supply port for supplying the particulate processing gas into the storage tank and clogging. This is also prevented by the chute plate for preventing the pressure of the granular material, and the effect of continuously supplying the gas for processing the granular material with an air flow sufficient for the processing of the granular material into the storage tank can be obtained.

According to the fourth aspect of the present invention, the gas for treating the granular material becomes a high-speed swirling flow at the position of the hollow zone formed below the chute plate for preventing the granular material pressure. The effect that desired processing efficiency, such as drying and cooling of the granular material which contacts the gas for granular material processing, can be obtained is obtained. In particular, according to the present invention as set forth in claim 5, the powder for granule processing is injected in the direction opposite to the rotation direction of the stirring blade provided in the storage tank, so that the powder , The relative air blowing speed of the gas for processing particles can be increased, and the processing efficiency of the particles can be further improved.

According to the sixth aspect of the present invention, a part of the gas for treating the granular material supplied below the chute plate for preventing the granular material pressure is supplied to the granular material pressure with air permeability. Since the gas can be passed above the preventing chute plate, the diffusion efficiency of the gas for processing particles in the storage tank can be increased, and the processing efficiency of the particles can be also increased.

According to the seventh aspect of the present invention, it is possible to prevent the particles from entering the gas supply port provided at the bottom of the storage tank by the partition plate, and to prevent the gas supply port from being unduly clogged. The advantage is obtained that the gas for processing the granular material having a sufficient air volume can be appropriately supplied into the storage tank without causing the generation.

According to the present invention, the powder in the storage tank is forcibly vibrated by the gas for processing the powder as a pulsating wave, so that the flow of the powder is controlled. And the agitation efficiency thereof can be increased, and as a result, the degree of contact between the gas for processing the granular material and the granular material can be increased, and the efficiency of the desired processing of the granular material can also be increased. The effect that it can be obtained is obtained.

According to the ninth aspect of the present invention, the particles can be appropriately stirred and mixed on the inclined surface of the upper surface of the stirring blade provided in the storage tank. The lower surface of the blade in the horizontal plane or the inclined plane of the elevation angle presses the granular material downward, which can prevent an extra load from acting on the discharge port on the bottom side of the storage tank, and the opening and closing operation of the discharge port Can be obtained more easily.

According to the tenth aspect of the present invention, due to the existence of the voids generated around the rotation shaft supporting the stirring blade, a part of the powdery granules on the upper side of the storage tank is removed. Even if a situation such as falling along the gap occurs, the powder can be received by the receiving plate and further falling can be prevented, so that the stirring state of the powder in the storage tank can be uniform. Therefore, it is possible to obtain an advantage that it is possible to appropriately prevent the granules in an insufficiently processed state from being discharged earlier than other granules.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a granular material processing apparatus according to the present invention.

FIG. 2 is a partially cutaway perspective view showing an example of a funnel-shaped chute plate for preventing pressure of a granular material according to the present invention.

FIG. 3 is a plan cross-sectional view of the granular material processing apparatus shown in FIG.

FIG. 4 shows a cross-sectional shape of a stirring blade.
FIG. 1B is a sectional view taken along line 1-X1, and FIG. 2B is a sectional view taken along line X2-X2 in FIG.

FIG. 5 is an essential part cross-sectional view showing a state where a gap is generated around a rotation axis.

FIG. 6 is a schematic cross-sectional view showing another example of the granular material processing apparatus according to the present invention.

FIG. 7 is a cross-sectional view of a main part of the granular material processing apparatus shown in FIG.

FIG. 8 is a plan sectional view of the processing apparatus for a granular material shown in FIG. 6;

FIGS. 9A and 9B are explanatory diagrams showing pressure waveforms in the case where a pulsating wave is used as a gas for treating a granular material.

FIG. 10 is a schematic cross-sectional view showing one example of a conventional powdery particle processing apparatus.

FIG. 11 is a schematic cross-sectional view showing another example of a conventional granular material processing apparatus.

FIG. 12 is an explanatory view showing an example of a stirring blade in a conventional granular material processing apparatus.

FIG. 13 is a cross-sectional view of a main part showing an example of a state of use in a conventional apparatus for treating a granular material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 1a Side peripheral wall part 1b Bottom part 1c Inner peripheral wall part 2 Stirrer blade 3 Blower 4 Heating device 5 Discharge port 7 Lid 10 Chute plate for preventing powder and granular material pressure 10b Vent hole 11 Rotating shaft 12 Receiving plate 13 Gas supply port 15 Gas supply port 16 Partition plate 17 Gas supply opening 20, 20A Upper surface portion (stirring blade) 22 22A Lower surface portion (stirring blade) 90 Powder and granular material A, Aa Processing device for powder and granular material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-187101 (JP, A) JP-A-50-121056 (JP, A) JP-A-4-281179 (JP, A) JP-A 62-187 245077 (JP, A) JP-A-63-75623 (JP, A) JP-A-63-16900 (JP, U) JP-A-61-55928 (JP, U) JP-A-61-200594 (JP, U) Japanese Patent Publication No. 47-49854 (JP, B1) Japanese Patent Publication No. 35-111 (JP, B1) Japanese Utility Model Publication No. 6-5596 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) F26B 11/16 F26B 17/00-17/34 F26B 25 / 00,25 / 04

Claims (11)

(57) [Claims] 1. A flat-bottomed storage tank for storing a granular material,
Stirring blade provided at least at the bottom in this storage tank
And a lid provided on the bottom side of the side wall surface in the storage tank and capable of opening and closing a discharge port for the powder and granular material, comprising: An apparatus for treating a granular material, wherein a chute plate for preventing a granular material pressure is provided at least at a position directly above the granular material. 2. The chute plate according to claim 1, wherein the chute plate for preventing the pressure of the granular material is formed in a funnel shape protruding downward from the position of the inner peripheral wall surface of the storage tank toward the center of the storage tank. Powder and granule processing equipment. 3. The apparatus for treating a granular material according to claim 2, wherein a gas supply port is provided below the chute plate for supplying a gas for processing the granular material into the storage tank. 4. The apparatus for treating a granular material according to claim 3, wherein the gas supply port is provided to inject a gas for processing the granular material in a direction along an inner peripheral wall portion of the storage tank. 5. The gas supply port according to claim 4, wherein the gas supply port is configured to inject a gas for processing particles in a direction opposite to a rotation direction of a stirring blade rotatably provided in the storage tank. The provided powder and particle processing equipment. 6. An apparatus for treating a granular material according to claim 3, wherein said chute plate is formed as a porous plate having air permeability. 7. The gas supply port according to claim 1, wherein at least one or more gas supply ports are provided at a bottom portion of the storage tank for supplying a gas for processing the granular material into the storage tank. And a partition plate that covers an upper side of the gas supply port and forms a horizontal gas supply opening. 8. The apparatus for treating a granular material according to claim 3, wherein the gas for processing the granular material supplied from the gas supply port into the storage tank is a pulsating wave. 9. The stirrer according to claim 1, wherein a stirring blade rotatable in a horizontal direction is provided in the storage tank, and at least a tip end of an upper surface of the stirring blade has an inclined surface having an elevation angle. And a lower surface portion of the stirring blade is formed as a horizontal surface or an inclined surface of an elevation angle. 10. The storage tank according to any one of claims 1 to 9, wherein a rotating shaft that allows the stirring blade to be rotatable in a horizontal direction is provided along the vertical direction in the storage tank. An apparatus for treating a granular material having at least one or more receiving plates for preventing the granular material from falling along the rotation axis. 11. A flat-bottomed storage tank for storing therein a granular material having stirring blades provided at least at a bottom portion , wherein:
A chute plate for preventing particulate pressure is provided immediately above a discharge port which is provided on the bottom side of the side wall surface of the storage tank and can be opened and closed by a lid. A storage tank for granular materials.