JPH09103668A - Powder particle treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set the upward blowing up force to be higher in the further outer circumferential side of a rotary disk and provide uniform particle size by converging respective gas jetting directions of a plurality of gas jetting nozzles to jet a gas toward powder particles formed in a casing treatment part from the circumferential part of the casing into a point of a fludizied bed layer in the treatment part. SOLUTION: In a lower part of a easing B, a rotary disk 2 whose upper space is made to be a treatment part A is installed immediately above a ventilation floor 20 through which a gas from a gas supplying inlet can be ventilated. In the lower part of the casing B, three gas jetting nozzles 1 are installed evenly toward a raw material to be granulated in the treatment part A at equal distance in the circumferential direction at proper height from the upper face of the rotary disk 2 and the gas jetted from respective nozzles is set to converge into the rotary center part of the rotary disk 2. Consequently, cross-sectional surface area and ventilating degree of the rotary disk 2 to pass a fluid from the bottom part of the casing B and form a fluidized bed layer in the upper part can be made higher in the further outer part of the outer circumference of the rotary disk 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stores powder particles in a casing in a fluidized state, and performs mixing, pulverization, drying, granulation, coating, surface treatment, etc. on the stored powder particles. TECHNICAL FIELD The present invention relates to a granular material processing apparatus that performs processing, or performs processing such as contacting with an active gas or an inert gas to modify the granular material, and more specifically, stores the granular material and stores the granular material. Is formed in the lower part inside the cylindrical casing, and a rotating disk is rotatably provided around the vertical axis of rotation in the lower part inside the casing, and the rotating part is rotated. With the space above the disk as the processing unit, the rotary disk is configured as a gas-particle processing unit that is configured as a ventilation body that receives the supply of gas from the bottom of the casing to ventilate the gas toward the processing unit. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, in the above-described powdery or granular material processing apparatus, a fixed floor plate provided at the bottom of a casing is used as a gas, and the gas supplied from the bottom is vented upward to fix the gas. Storage and fluidization of powder and granules on the floor plate, drying,
It was used for granulation and coating.

[0003]

In the above-mentioned powdery or granular material treating apparatus, granulation occurs due to the cohesive force of the fluidized powdery or granular material, but the fluidized state of the particles in the fluidized bed may not be uniform. However, if fluidization becomes insufficient, there is a problem that a uniform granulated product cannot be obtained. As a solution to this problem, for example, as a granulating device, as shown in FIG.
A rotary disk 2 is provided at the bottom of the rotary disk 2, a ventilation hole is formed in the rotary disk 2, and the rotary disk 2 is configured to pass gas. A powdery or granular material processing apparatus (hereinafter referred to as a conventional apparatus) in which a processing portion A for ejecting upward through a vent hole of the disk 2 to form a fluidized bed on the rotating disk 2 is formed.
Has been proposed. As a result of adopting the rotating disk 2 in the above-mentioned proposed powdery or granular material processing apparatus, the powdery or granular material contained in the processing section A and close to the rotating disk 2 has a centrifugal force associated with the rotation of the rotating disk 2. Is applied to the inner wall of the casing B, flows in the centrifugal direction on the rotating disk 2, reaches the vicinity of the inner wall of the casing B, and then rises along the inner wall of the casing B. It flows diagonally downward in the direction of the center of B, causing a cyclical flow. Furthermore, in addition to using the rotating disk 2,
There is also proposed a fluidized bed in which a stirring blade 21 is provided rotatably around a vertical axis of rotation as shown in FIG. The stirring blade 21 is intended to improve the mixing and stirring of the powder particles by stirring the powder particles in the circumferential direction of the fluidized bed, and is mounted on the rotating disk 2. The fluidized bed formed above the rotary disc 2 is agitated by the agitating blades 21 that rotate together with the rotary disc 2, and the same rotary flow is applied to the granular material floating from the rotary disc 2 in a fluidized state. It is caused to rise and the centrifugal force associated with the rotation thereof promotes the flow toward the inner wall of the casing B. In this way, the particles are mixed and stirred, and at the same time, contact with the gas jetted upwards, and the processing such as granulation is advanced. However, the particles move to the inner wall side of the casing B. Because it is easy to be unevenly distributed,
There is a problem that the blowing airflow in the vicinity of the inner wall is insufficient, the flow of the powder and granules in this portion becomes insufficient, and the particles agglomerate, the agglomerates are generated, and the casing B is fixed to the inner wall and the vent is closed. was there. Such problems are not peculiar to the above-mentioned granulating apparatus, but drying of the wet granular material containing water and a solvent, coating on the surface of the granular material, and surface of the granular material which brings the granular material into contact with gas. This is also a problem common to the treatment of powders and granules that utilize the flow state of various powders and granules, such as the preparation or surface treatment of powders and granules based on the reaction in (1). Therefore, in order to solve such a problem, the Applicant has conducted intensive research and studies, and blows upward the gas supplied from the bottom of the casing B to the rotary disk 2 in the conventional apparatus. There has been proposed a powdery or granular material processing device in which the force is set to be larger toward the outer peripheral side of the rotating disk 2. As a result, the inadequate contact of the powder or granular material in the vicinity of the inner wall of the casing B with the jetted gas was improved to some extent, and the sticking to the inner wall and the blockage of the vent were eliminated. In the above proposal, the problem of preventing the formation of aggregates and coarse particles and obtaining a granulated product having a uniform particle size remains. The present invention solves the above problems and enhances the fluid agitation effect in the processing section without complicating the configuration of the processing apparatus as compared with the conventional apparatus, and thus the processing of the powdery or granular material to be processed is performed. It is an object of the present invention to provide a powdery or granular material processing device which can accelerate the processing time and shorten the processing time.

[0004]

[Means for Solving the Problems]

[Characteristic Configuration 1] The characteristic configuration of the powdery- or granular-material processing apparatus of the present invention for the above-mentioned purpose is to provide a casing of the powdery- or granular-material processing apparatus equipped with a rotating disk rotatable around a vertical axis of rotation as a gas. A plurality of gas injection nozzles for ejecting gas toward the powder or granular material in the processing unit formed in the lower portion of the casing from the peripheral portion are provided, and the gas injection direction of each of the plurality of gas injection nozzles flows in the processing unit. It is attached so as to concentrate toward one point in the layer (corresponding to claim 1). [Operation of Characteristic Configuration 1] Therefore, according to the above characteristic configuration,
With the rotation of the rotating disk, the granules on the rotating disk are accelerated in granulation while rolling, and at the same time, the granular material in the fluidized bed that flows while rotating with the rotation of the rotating disk is a plurality of particles. The gas ejected from the gas ejecting nozzle is blown toward the inside of the casing, and the gas ejecting direction is concentrated at one point, so the blown powder and granules collide with each other. By colliding with each other in this way, the crushing action of the counter jet mill can be added, and the powder or granules are crushed or crushed (hereinafter referred to as crushing) to suppress the agglomeration of the powder or granules. It becomes possible to make the particle diameters of the powder particles uniform. Further, by increasing the injection speed of the gas to be injected, it is possible to pulverize the coarse powder as well, and it is also possible to pulverize the raw material powder to be charged to adjust the particle size and then further perform granulation. It will be possible. Particularly, in the case of granulation, coarse particles produced by granulation can be crushed and sized. Further, if the powdery or granular material treatment apparatus of the present invention is used as a mixer, for example, coarse particles are used as a raw material, firstly crushed, and after mixing, a chemical solution is added to perform coating or granulation with one apparatus. Can be done consistently. This is possible only by providing a gas injection nozzle.

[Characteristic Configuration 2] A second characteristic configuration of the powdery- or granular-material processing apparatus of the present invention for the above purpose is a powdery or granular material provided as a gas passing through a rotating disk rotatable about a vertical axis of rotation. A plurality of gas injection nozzles for ejecting gas toward the powder particles in the processing unit formed in the lower part of the casing of the body processing device are provided in the peripheral part of the casing, and above the rotary disk provided in the lower part of the casing. Receiving means for receiving the jet gas from the gas jet nozzle is provided in the fluidized bed, and the gas jet nozzle is attached so as to jet the gas toward the receiving means (corresponding to claim 2). In point. [Operation of Characteristic Configuration 2] Therefore, according to the above characteristic configuration,
With the rotation of the rotating disk, the granular material on the rotating disk is accelerated granulation while rolling, at the same time, the granular material in the fluidized bed flowing while rotating with the rotation of the rotating disk, The gas is blown off by the gas ejected from a plurality of gas ejection nozzles whose gas ejection direction is directed to the receiving means, and is blown against the receiving means to collide with it. The granular material collides with the receiving means and is crushed. The larger the particle diameter of the granular material, the greater the impact force, and the crushed granular material has a narrow particle size distribution and a uniform particle diameter. It becomes a thing. This is possible only by providing the gas injection nozzle and the receiving means.

[Additional Configuration 1 and Operation] It is sufficient if a plurality of the gas injection nozzles of the invention of the second characteristic configuration are dispersedly arranged in the circumferential direction of the casing (corresponding to claim 3), With this configuration, the granular material is blown inward from the processing portion from a plurality of portions on the peripheral portion of the casing, and at the same time, the processing can be performed over a wide range.

[Additional Configuration 2 and Operation] Further, it is all right if the receiving means of the invention described in claim 2 or 3 is provided on the upper surface of the rotating disk (corresponding to claim 4). The receiving means can be configured by utilizing the portion of the rotating disk.

[Additional Structure 3 and Operation] Further, it is more preferable that the receiving means of the invention described in claim 4 is provided at the center of rotation of the rotary disk (corresponding to claim 5).
By doing so, the path length of the powder or granules sprayed by the plurality of nozzles is made uniform, and the condition of collision of the powder or granules with the receiving means, and therefore the crushing condition of the agglomerated powder or granules are set. Since the particles can be made uniform, it becomes easier to make the particle diameters of the powder particles uniform.

[Additional Configuration 4 and Operation] Further, the gas injection nozzle according to any one of claims 1 to 5,
It is better if the ejected gas is provided in a direction that concentrates toward the center of rotation of the rotating disk (corresponding to claim 6), and in this case, the powder-granulated particles are If the receiving means are provided in the path of the granular material, they collide with each other at the center of the rotating disk, or if a receiving means is provided, the powder that has collided with the receiving means and has not collided The granules will collide at the center. Also,
If the receiving means is in the central portion, all the powdery particles blown against the gas will collide with the receiving means.
By this collision, the particle diameters of the powdery particles are made more uniform.

[Characteristic Configuration 3] A third characteristic configuration of the powdery- or granular-material processing apparatus of the present invention for the above purpose is a powdery- or granular-material processing apparatus provided with a stirring blade rotatable about a vertical rotation axis. A plurality of gas injection nozzles for ejecting gas from the peripheral portion of the casing toward the powder particles in the processing portion formed in the lower portion of the casing are provided, and the plurality of gas injection nozzles each have a gas injection direction within the processing portion. Is attached so as to concentrate toward one point in the fluidized bed (corresponding to claim 7). [Operation of Characteristic Configuration 3] Therefore, according to the above characteristic configuration,
Similar to the above-mentioned Characteristic Configuration 1, the powdery particles in the fluidized bed that flow while rotating with the rotation of the stirring blade are blown toward the inside of the casing by the gas injected from the plurality of gas injection nozzles. Since the gas ejection directions are concentrated at one point, the blown powder and granules collide with each other. By colliding with each other like this,
The crushing action of the counter jet mill can be added, and the powder or granules can be crushed to suppress the agglomeration of the powder or granules and make the particle diameter of the powder or granules uniform. Further, by increasing the injection speed of the gas to be injected, it is possible to pulverize the coarse powder as well, and it is also possible to pulverize the raw material powder to be charged to adjust the particle size and then further perform granulation. It will be possible. Particularly, in the case of granulation, coarse particles produced by granulation can be crushed and sized. Further, if the powdery or granular material treatment apparatus of the present invention is used as a mixer, for example, coarse particles are used as a raw material, firstly crushed, and after mixing, a chemical solution is added to perform coating or granulation with one apparatus. Can be done consistently. This is possible only by providing a gas injection nozzle.

[Characteristic Configuration 4] A second characteristic configuration of the powdery- or granular-material processing apparatus of the present invention for the above purpose is a powdery- or granular-material processing apparatus provided with a stirring blade rotatable about a vertical rotation axis. The point is that a plurality of gas injection nozzles for ejecting gas toward the stirring blade are provided in the peripheral portion of the casing (corresponding to claim 8). [Operation of Characteristic Configuration 4] Therefore, according to the above characteristic configuration,
The powdery particles in the fluidized bed, which flow while rotating with the rotation of the stirring blade, are blown off by the gas jetted from a plurality of gas jet nozzles whose gas jetting direction is directed to the stirring blade, It is sprayed and collides. The powder and granules are agitated by the agitating blade and given a rotational flow in the circumferential direction, and are crushed by colliding with the agitating blade. The larger the particle diameter of the agglomerate, the greater the impact force, The crushed powder and granules have a narrow particle size distribution and a uniform particle size. This is possible only by providing the gas injection nozzle toward the stirring blade.

[Additional Structure 5 and Operation and Effect] Furthermore, the gas injection nozzles according to any one of claims 1 to 8 are evenly arranged in the casing at equal intervals (corresponding to claim 9). It is better if there is, and if this is done, gas will be evenly blown into the processing unit, and the powder particles can be blown out evenly, so the particle size of the powder particles in the circumferential direction on the rotating disk. Can be made uniform. Therefore, the opportunity of contact between the blown-up gas and the granular material is equalized in the circumferential direction.

[Additional Configuration 6 and Operation and Effect] Further, the gas supplied to the gas supply path to the gas injection nozzle according to any one of claims 1 to 9 is controlled to be intermittently supplied. It is all right if an injection gas control device is provided (corresponding to claim 10). By doing so, the flow of gas that blows up the powder or granular material that maintains the fluidized state, and thus the stable fluidized state of the fluidized bed, is disturbed. Can be suppressed. Therefore,
The chances of contact between the blown-up gas and the granular material are further equalized.

[Additional Structure 7 and Action and Effect] Then, the supply time of the gas intermittently supplied to the invention according to claim 10 is 0.1 to 5 seconds per supply (claim 1
(Corresponding to 1) is better, and by doing so, the effect of intermittent supply of the gas can be made more effective. still,
In order to keep the state of the fluidized bed good without changing much, it is preferable that the gas supply time is 5 seconds or less, and if the supply time is less than 0.1 seconds, the effect of gas injection Does not work effectively. For example, if the gas is continuously jetted for 20 seconds, the circulating flow in the plane is added to the circulating flow of the powdery particles, and the vertical circulating flow is disturbed, so that the effect of the present invention is partially impaired. A more preferable gas supply time is in the range of 0.1 to 2 seconds.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The above-described embodiments of the present invention will be described below with reference to an example of a granulating apparatus with reference to the drawings. A granulating apparatus according to the present invention, which is an example of a granular material processing apparatus, supplies raw material powder (a type of granular material) and a binder as a granulating raw material into the apparatus and fluidizes the granular raw material. A fluidized bed is formed, and the granulated raw material is granulated into granules in a desired state in the fluidized bed.

An example of the granulating apparatus is shown in FIG. 1. A casing B forming the outer shell of the main body is formed of a cylindrical body whose upper portion is slightly expanded in diameter than its lower portion. Above the casing B, a supply unit 19 for batch-supplying the raw material powder into the casing B is provided.
In the lower part of the casing B, a processing section A for temporarily storing and processing the granulated raw material composed of the raw material powder and a binder is provided. Grain is to be done. In addition, above the upper part of the casing B, a filter unit 15 for filtering dust in the exhaust gas is provided.

On the other hand, the binder of the granulation raw materials is
The spraying unit 11b, which is disposed vertically in the center of the casing B and has a lower end, is sprayed and supplied to the processing unit A by a spraying device 11 that opens downward in the casing B. The downstream end of the supply pipe from the compressed air supply device 9 and the binder supply device 10 is connected to the upper end supply part 11a of the spraying device 11, and the binder is directed from the spraying part 11b to the processing part A. It is sprayed. That is, the binder is supplied from the binder supply device 10, and the compressed air from the compressed air supply device 9 is used as a carrier gas to be spray-supplied to the processing section A by the spray device 11 to produce the raw material powder or the powder. It adheres to the surface of the grain material.

The supply pipes from the compressed air supply device 9 and the binder supply device 10 are the casing B.
Is also connected to the binder supply port 10a on the lower side of the casing, and is opened in the casing B so that the binder can be separately supplied to the processing section A by using compressed air as a carrier gas. In this way, the shortage of the binder supplied by spraying or the shortage of the adhesion of the binder to the granulation raw material is compensated.

An air blower 7 with an air filter 7a is provided on the side of the casing B, and the air supplied from the air blower 7 is heated to an appropriate temperature by a heater 8.
Air supply port 7 provided on the bottom side of the casing B
It is supplied to the bottom of the casing B via b. The temperature of the supply air is measured using a sensor 8a provided at the outlet of the heater 8, and the temperature of the supply air is controlled so as to match the set value.

The outside of the filtering unit 15 is connected to an exhaust device 12 for suctioning and exhausting, and the inside of the filtering unit 15 is provided in the filtering unit 15 for filtering the exhaust gas. A blow pipe 15b for cleaning the bag filter 15a is also provided. The supply pipe from the compressed air supply device 9 is also branched and connected to the blow pipe 15b. That is, when the bag filter 15a is clogged, compressed air is appropriately ejected from the blow pipe 15b toward the bag filter 15a in the direction opposite to the exhaust passage, and the bag filter 15a is supplemented with the compressed air. The so-called back-cleaning is performed in which dust that adheres and causes clogging is blown down toward the processing section A.
The dust blown off is returned to the processing section A and processed.

Since the binder is supplied to the processing section A in a state of being dissolved in the solvent, it is necessary to remove the solvent in parallel with the granulation. Therefore, the processing unit A
The heated supply air is supplied from below to the granulation raw material stored in the above, and the solvent is removed by evaporating by contacting the supply air. That is,
The heated supply air is supplied upward from the rotary disk 2 to fluidize the granulation raw material and bring them into contact with each other to heat and evaporate the solvent of the binder remaining in the granulated granules. As a result, the solvent is evaporated.

In the lower part of the casing B, which is provided above the air supply port 7b, the supply gas from the air supply port 7b can be ventilated upward while preventing the granulation raw material from falling.
Immediately above the ventilation floor 20 made of a stainless steel sintered plate,
A rotating disk 2 having the upper space thereof as the processing section A is provided. The rotary disk 2 is provided rotatably around a vertical axis of rotation of a motor 13 arranged below the bottom of the casing B, and has a shaft hole penetrating to the position of the axis of the rotary disk 2. The shaft hole is fitted onto the upper end portion of the drive shaft 14 which can be fitted and inserted freely, and a male screw formed on the upper end portion of the drive shaft 14 is screwed with a nut to be tightened. The drive shaft 14 and the drive shaft 14 are integrally rotated around the axis in the vertical direction.

In the lower part of the casing B, there are further provided three gas injection nozzles 1 for injecting gas toward the granulation raw material which is the powder or granular material in the processing section A. In the direction in which the gas ejected from each gas ejection nozzle 1 is concentrated toward the center of rotation of the rotary disk 2, the gas is ejected from the upper surface of the rotary disk 2 at an appropriate height at even intervals in the circumferential direction. It is provided (see FIG. 3). A gas supply device 4 for supplying a gas to the gas injection nozzle 1 is provided on the side of the casing B, and a high-pressure gas supply path for supplying a high-pressure gas and a low-pressure gas for supplying a high-pressure gas are provided through regulators respectively. The gas injection nozzle 1 is connected via the valve 5 to each of the low-pressure gas supply passages so that the gas can be arbitrarily ejected toward the granulation raw material in the processing section A.

The rotary disk 2 is constructed as a vent for receiving gas supplied from the bottom of the casing B and venting the gas toward the processing section A. Specifically, as shown in FIGS. 2 and 3, the rotary disk 2 is formed with a plurality of arc-shaped through holes 16 concentrically for venting the supply air from the bottom of the casing B upward. The through hole 16 is made of a disk and is filled with a porous body 17 made of a sintered body made of stainless steel having air permeability. Therefore,
The fluid supplied from the bottom of the casing B passes through the through holes 16 to fluidize the granulation raw material supplied on the rotating disk 2 by its upward flow, and then the fluid is supplied onto the rotating disk 2. Form a fluidized bed. As described above, in view of the fact that the granulation raw material is more unevenly distributed toward the outer peripheral portion of the processing section A, the through holes are formed so that the air permeability of the rotary disk 2 is increased toward the outer peripheral portion. 16 cross-sectional areas and air permeability are set.

On the upper surface of the rotary disk 2, that is, in the fluidized bed, there is provided a receiving means 3 for receiving the jet gas from the gas jet nozzle 1. The receiving means 3 is provided at the center of rotation of the rotary disc 2, and the nut constitutes the receiving means 3, and the overall shape is substantially conical, and a female screw with a downward opening is formed inside. The granulated raw material or raw material powder, which is a powder or granular material on which the substantially conical surface is sprayed, is received, and the powder or granular material is crushed. Further, a stirring blade 21 for tightening the screw and stirring the inside of the processing section A is attached to the nut. Since the receiving means 3 is formed in a substantially conical shape as described above, it receives the jet gas from the gas jet nozzle 1 and crushes the powder particles to be sprayed, and also changes the direction of the jet gas. It also has the function of deflecting upward. Therefore, a circulation flow in the opposite direction to the circulation flow caused by the centrifugal force caused by the rotation of the rotating disk 2 is induced.

Further, an injection gas control device 6 for controlling the gas to be supplied to the gas injection nozzle 1 via the high pressure and low pressure gas supply paths through the respective valves 5 so as to intermittently supply the gas. Is provided. The injection gas control device 6 is configured so that the supply interval of the gas supplied intermittently can be set to 0.5 to 10 seconds and the supply time can be set to 0.1 to 5 seconds, respectively.

The gas supply device 4 is 0.15 to 1MP.
A gas can be supplied at a pressure of a, and a regulator R1 capable of adjusting the pressure of the supply gas to 0.1 to 0.5 MPa is provided in the low pressure gas supply path. The gas supply path is opened and closed, and the pressure of the supply gas is 0.3 to 0.8 in the high pressure gas supply path.
A regulator R2 that can be adjusted to MPa is provided, and the high pressure side valve 5b opens and closes the high pressure gas supply path. As the valve 5 controlled by the injection gas control device 6, the granulation raw material is crushed, that is,
When crushing or crushing (referred to as a crushing mode), the high-pressure side valve 5b is attempted to disperse or dry the granulation raw material (referred to as a dispersion mode). ) Is the low pressure side valve 5a,
Control and open / close respectively.

In the above-mentioned granulating apparatus, the regulator R1 provided in the low pressure gas supply passage used in the dispersion mode is set to 0.3 MPa, and the regulator R2 provided in the high pressure gas supply passage used in the crushing mode is set to 0.3 MPa. 0.6M
Pa is set, and both the low pressure side valve 5a and the high pressure side valve 5b are set by the injection gas control device 6.
The valve is opened for 0.3 seconds at intervals of 1 second.

Further, an annular steam injection pipe 18 is arranged below the rotary disk 2 so that steam is supplied from the outside of the casing B (see FIG. 2). As shown in FIG. 4, the vapor injection pipe 18 is provided with a plurality of nozzle holes 18a on its upper surface so that vapor can be ejected upward. This is used for cleaning the ventilated floor 20 and the porous body 17 for removing clogging, and is also used for cleaning the entire path leading to the filtration unit 15 of the powdery or granular material processing apparatus. That is, the granulation process for one batch is completed, and the granules are discharged (the discharge path is not shown).
Then, steam is jetted from the nozzle hole 18a of the steam jet pipe 18 and sprayed on the aeration floor 20.
At the same time as cleaning 0, the rotating disk 2 immediately above
The porous body 17 is also washed. At this time, the exhaust device 12
Sucks the injected steam from inside the granulator.

In the above-mentioned granulating apparatus, the pressure of the gas jetted from the gas jet nozzle 1 is adjusted in two steps.
5 to form a fluidized bed on the rotating disk 2 and to intermittently inject the gas in the crushing mode from the gas injecting nozzle 1 without supplying the binder to pulverize the raw material powder to obtain a desired particle size distribution. The binder is supplied when approaching, and when the granulation progresses, the gas injection from the gas injection nozzle 1 is switched to the dispersion mode to evaporate the solvent of the binder and obtain a granulated product having a desired particle size distribution. You can

An example of the operation of the above granulator is as follows. First, while the air supply from the air blower 7 is supplied from the air supply port 7b and the exhaust device 12 exhausts air from above the casing B, the raw material powder of coarse particles is charged into the processing unit A from the supply unit 19. Therefore, the gas is repeatedly jetted from the gas jet nozzle 1 in the crushing mode for 0.3 seconds at intervals of 1 second.
The gas injection pressure at this time is set to 0.6 MPa.
In this way, the raw material powder is pre-ground as a pretreatment for granulation. If the raw material powder is crushed into fine particles having a desired particle size distribution,
The pre-grinding process is completed. When the preliminary crushing process is completed, the process moves to the granulation process. The gas injection from the gas injection nozzle 1 and the binder spray from the binder supply device 10 are alternately performed, and the binder spray for 3 seconds and the gas spray for 0.3 seconds after the binder spray is stopped alternate. Is repeated. That is, granulation and crushing are performed alternately. The gas injection pressure at this time is 0.4 MPa. In this way, by selecting a binder and repeating granulation and crushing, it is possible to suppress excessive agglomeration of powder and granules and granulate into granules having a desired particle size distribution. When the granulation process is completed, the process moves to the drying process. Even during the granulation process, the powder and granules come into contact with the heated air supply,
Most of the solvent in the binder evaporates as it is heated, but some solvent still remains in the granules at the end of the granulation process. Drying is required to evaporate this residual solvent. In this drying step, of course, the binder is not sprayed and the gas is sprayed in the dispersion mode. That is, the fluidized bed is agitated for drying. With the above, a granulated product composed of fine powder of a desired particle size is formed from coarse particles, and all the steps of granulation for drying are completed, but as described above, in the granulating device of the present invention, a plurality of conventional processing devices are used. It has become possible to consistently perform pulverization, granulation, and drying that were performed using the same device. The gas injection pressure condition, time, interval, etc. are different depending on the scale of the granulating device, the properties of the raw material powder, the properties of the binder to be selected, etc., and are universal for the powdery or granular material processing device of the present invention. Not a thing.

Next, another embodiment of the present invention will be described. <1> In the above embodiment, an example in which the powdery or granular material processing device of the present invention is used as a granulating device has been shown, but the use of the present invention is not limited to the above, and high-dispersion mixing of powdery and granular materials, It can be used for coating without agglomeration, and can also be used for surface reaction of powder or granules by contacting the surface of the powder or granules with a reaction gas. Depending on the conditions, precise mixing, high speed mixing, etc. can be easily performed. <2> In the above embodiment, an example in which a fluidized bed is formed in the processing section A has been shown, but a mixed layer in which powder particles are suspended and mixed may be formed in the processing section A. Is called a fluidized bed including the mixed layer. <3> An example in which three gas injection nozzles 1 are provided at an appropriate height from the upper surface of the rotary disk 2 has been shown, but the position and the number are arbitrary, and the arrangement interval is also the device. It can be arranged arbitrarily according to the design. <4> In the above embodiment, the fixing nut for the drive shaft of the rotating disk 2 is used as the receiving means 3, but the stirring blade 21 can also be used as the receiving means. The receiving means 3 is not indispensable, and the powder and granules blown by the jet gas from the gas jet nozzle 1 so as to perform the same action as the crushing action of the counter jet mill for making the powder and granules collide with each other. It suffices that the gas injection nozzle 1 is arranged so as to collide with each other. <5> In the above-described embodiment, an example of intermittently injecting gas from the gas injection nozzle 1 has been described, but this gas injection does not necessarily have to be intermittent, and for example, the processing unit A
Alternatively, a mixed layer may be formed, and gas may be continuously jetted in a dispersion mode. This is effective for drying powder and the like. <6> The configuration of the rotating disk 2 is arbitrary and is not limited to that shown in the above-mentioned embodiment, and the granular material supplied from below the casing B is treated so as to form a fluidized bed or a mixed bed. It should have a function of blowing up to A. <7> The gas supply path of the gas supply device 4 shown in the above embodiment is not limited to two paths, and the mode is not limited to the above-mentioned two modes, and a plurality of three or more modes are set. It is possible to achieve this, and by appropriately combining these modes, suitable processing becomes possible.
In the example of the above-described embodiment, the valves 5 are provided in both gas supply paths, but a switching valve is provided at the confluence of each gas supply path to the pipe to the gas injection nozzle 1 for control. May be. <8> Further, a stirring blade 21 as shown in FIG. 5 may be attached to the upper surface of the rotary disk 2, and the stirring blade 21 also gives the fluidized bed a motion in the rotation axis direction. The stirring effect of the fluidized bed can be further enhanced similarly to the stirring blade 21 shown in FIG. In the rotating disc 2 shown in this figure, instead of the through hole 16 filled with the porous body 17, the rotating disc 2 is rotated (the rotation direction is indicated by a white arrow in the figure). Slits 16a that are inclined in the thickness direction are provided in the direction in which the powder or granular material is prevented from entering. By constructing the rotary disk 2 in this way, it is possible to form a vent hole that guides the air supply into the fluidized bed while preventing the powder particles from falling without filling the porous body 17. In the figure, simple arrows indicate the ventilation direction. <9> Blower 7, heater 8 in the above-mentioned embodiment,
The compressed air supply device 9, the binder supply device 10, the spraying device 11, the exhaust device 12, the motor 13, the filtration unit 15, the steam injection pipe 18, the supply unit 19, and the like, and the configuration of the auxiliary devices thereof are arbitrary and are the same as those described above. It is not limited to the configuration.

[0033]

【Example】

[First Embodiment] FIG. 6 shows the effect of suppressing the generation of coarse particles during granulation by the powdery or granular material processing apparatus of the present invention. The apparatus of the present invention is equipped with the stirring blade 21 shown in FIG. A mixed powder of lactose and corn starch (lactose 70%, corn starch 30%) (average particle size 69 μm) was used as a granulation raw material, and granulated to an average particle size of 500 μm. The operating conditions were that the aqueous solution of hydroxypropyl cellulose was used as the binder, the air supply temperature was 60 ° C., and the air flow velocity of the air supply fluid was 0.5 m / s.
And

The figure shows the particle size distribution under the sieve, and the curve a in the figure shows that by the apparatus of the present invention, and the curve b is equipped with the rotating disk 2 and the stirring blade 21 shown in FIG. 9, but gas injection is performed. This is due to a non-existing device (hereinafter referred to as a comparison device). The curve c shows the particle size distribution of the raw material powder. As can be seen from the figure, the comparative device contains 20% or more of particles having a particle size of 1000 μm or more, but almost none of the particles granulated by the device of the present invention has a particle size of 1000 μm ( Product value decreases when the particle size is 1000 μm or more.)

[Second Embodiment] FIG. 7 shows the effect of the powder / particle processing apparatus of the present invention on the powder / particle drying. In addition, as a granulation raw material, an aggregate of fluororesin (aggregated particle diameter 400 μm to several mm,
Moisture retention 46% W. B) is used, the supply temperature is 100 ° C,
The flow velocity of the processing section A was set to 0.87 m / s.

The figure shows the time variation of the water content in the granules. In the figure, the curve a shows that by the device of the present invention, the curve b shows the comparison device, the curve c shows neither the rotating disk nor the stirring blade, A conventional device that does not perform gas injection (hereinafter, referred to as a comparison device) is shown. As shown in the figure, according to the device of the present invention, the contact between the powder and granules and the flowing gas is improved by the action of the jet gas, so that the drying is fast and the water content in the powder and granules is dried to 0.1%. The time required for this was about half that in the case of using the comparative device.

[Third Embodiment] FIG. 8 shows the crushing effect in the coating granulation of the granules by the powder / particle processing apparatus of the present invention. The stirring apparatus 21 shown in FIG. 2 is attached to the powdery or granular material processing apparatus of the present invention, but the rotating disk is not provided.
The granulation raw material and the operating conditions were the same as in the first example, and the granulation was performed so that the average particle diameter was 25 μm.

The figure shows the particle size distribution under the sieve. In the figure, the curve a shows the one according to the apparatus of the present invention, and the curve b shows the stirring blade 21 shown in FIG. 9, but the rotating disk is not provided. , A conventional device that does not perform gas injection (hereinafter referred to as a comparison device) is shown. The curve c shows the particle size distribution of the raw material powder. As shown in the figure, the particle size distribution of the comparison device is almost the same as that of the raw material powder,
According to the apparatus of the present invention, a product having fine particles having an average particle diameter of about 25 μm is obtained. Incidentally, even in the results of electron microscope observation, in the case of the comparative device, it was observed that fine cornstarch particles were attached around the lactose particles, but in the device of the present invention, around the lactose particles. Adhesion of corn starch particles and agglomerated particle groups were not observed.

[0039]

As described above, according to the present invention,
A product having a uniform particle size, which has been sized in granulation, is obtained, and the opportunity for contact between the gas in the fluidized bed and the powder is promoted,
It was possible to shorten the processing time in the powder and granular material processing such as crushing, mixing, drying, coating, and surface processing.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the structure of a granulating apparatus of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part showing an example of a rotating disk according to an embodiment of the present invention.

FIG. 3 is a plan view of an essential part showing an example of a rotating disk according to an embodiment of the present invention.

FIG. 4 is a plan sectional view of an essential part showing a mounted state of a steam injection pipe according to another embodiment of the present invention.

FIG. 5 is a perspective view of a main part showing another example of the stirring blade together with another embodiment of the rotating disk of the present invention.

FIG. 6 is an under-sieve particle size distribution curve diagram showing the effect of the present invention on suppressing the formation of coarse particles during granulation.

FIG. 7 is a water retention-time curve diagram showing the effect of the present invention on drying.

FIG. 8 is an under-sieve particle size distribution curve diagram showing the effect of the present invention on the particle size distribution of particles produced during coating granulation.

FIG. 9 is an explanatory diagram showing a configuration of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas injection nozzle 2 Rotating disk 3 Receiving means 6 Injection gas control device 20 Vented bed 21 Stirring blade A Processing part B Casing

Claims (11)

[Claims] 1. A processing unit (A) for storing a powder or granular material and forming a fluidized bed for flowing the stored powder or granular material by a gas is formed in a lower portion in a substantially cylindrical casing (B), A rotating disk (2) is provided in the lower part of the casing (B).
The rotary disk (2) is rotatably provided around a vertical axis of rotation so that the upper space of the rotary disk (2) serves as the processing section (A), and the rotary disk (2) extends from the bottom of the casing (B). When the gas is supplied, the gas is supplied to the processing unit (A).
It is a powdery-particles processing apparatus comprised in the ventilation body which ventilates toward the air, and is a gas jet which injects gas toward the powdery particles in the said process part (A) from the peripheral part of the said casing (B). A powdery or granular material processing apparatus, wherein a plurality of nozzles (1) are provided, and each of the plurality of gas injection nozzles (1) is attached so that the gas injection direction thereof is concentrated toward one point in the fluidized bed. 2. A processing unit (A) for storing a powder or granular material and forming a fluidized bed for flowing the stored powder or granular material by a gas is formed in a lower portion in a substantially cylindrical casing (B), A rotating disk (2) is provided in the lower part of the casing (B).
The rotary disk (2) is rotatably provided around a vertical axis of rotation so that the upper space of the rotary disk (2) serves as the processing section (A), and the rotary disk (2) extends from the bottom of the casing (B). When the gas is supplied, the gas is supplied to the processing unit (A).
A powdery or granular material processing apparatus configured as a vent for venting air toward a powder or granular material, wherein a plurality of gas injection nozzles (1) for ejecting gas toward the powdery or granular material in the processing section (A) are provided in the casing. (B) is provided in the peripheral portion, and in the fluidized bed above the rotating disk (2), a receiving means (3) for receiving the jet gas from the gas jet nozzle (1) is provided, and the gas jet nozzle is provided. (1)
Is attached so that the gas is ejected toward the receiving means (3). 3. The powdery or granular material processing apparatus according to claim 2, wherein a plurality of the gas injection nozzles (1) are dispersedly arranged in the circumferential direction of the casing (B). 4. The powdery or granular material processing apparatus according to claim 2, wherein the receiving means (3) is provided on the upper surface of the rotating disk (2). 5. The powdery or granular material processing apparatus according to claim 4, wherein the receiving means (3) is provided at a center of rotation of the rotary disk (2). 6. The gas jet nozzle (1) according to claim 1, wherein the gas jet nozzle (1) is provided in a direction in which the jetted gas is concentrated toward the center of rotation of the rotary disk (2). Powder processing equipment. 7. A flow for causing a ventilation floor (20) to be provided in a lower portion of a cylindrical casing (B) for storing powder and granules, and for causing the stored powder and granules to flow by a gas which has passed through the ventilation floor (20). While forming a processing part (A) for forming a layer,
A powdery or granular material processing apparatus, wherein a stirring blade (21) is rotatably provided around a vertical axis of rotation in the fluidized bed above the aerated bed (20), the casing (B) comprising: A plurality of gas injection nozzles (1) for ejecting gas from the peripheral portion toward the powder or granular material in the processing unit (A) are provided, and the gas injection direction of each of the plurality of gas injection nozzles (1) is the flow. The granular material processing device is installed so as to concentrate toward one point in the layer. 8. A flow for allowing a ventilation bed (20) to be provided in a lower portion of a cylindrical casing (B) for storing powder and granules so that the stored powder and granules are made to flow by a gas which has passed through the ventilation bed (20). While forming a processing part (A) for forming a layer,
A powdery or granular material processing apparatus, comprising a stirring blade (21) rotatably around a vertical axis of rotation in the fluidized bed above the aeration bed (20), wherein the stirring blade (21) The powdery- or granular-material processing apparatus which is provided with the some gas injection nozzle (1) which injects a gas toward the periphery of the said casing (B). 9. The gas injection nozzles (1) are evenly arranged at equal intervals in the casing (B).
8. The granular material processing device according to any one of 8. 10. The injection gas control device (6) for controlling to intermittently supply the gas supplied to the gas supply path to the gas injection nozzle (1), according to claim 1. The powder or granular material processing device according to. 11. The supply time of the gas supplied intermittently is 0.1 to 5 seconds per one supply.
The granular material processing device described.