WO2017002694A1

WO2017002694A1 - Continuous particle manufacturing device

Info

Publication number: WO2017002694A1
Application number: PCT/JP2016/068607
Authority: WO
Inventors: 公二久澄; 長谷川　浩司; 長門　琢也; 小林　誠
Original assignee: 株式会社パウレック
Priority date: 2015-06-30
Filing date: 2016-06-23
Publication date: 2017-01-05

Abstract

Particles P within a processing vessel 1 wherein unprocessed particles P0 and processed particles P1 are mixed are sucked in by a suction nozzle 6 and are sent to a classification mechanism 7b from a cyclone mechanism 7a of a sorting unit 7. Particles P, which are sent to the classification mechanism 7b, are sorted into unprocessed particles P0 and processed particles P1 in a classification airflow A2 that is blown upward, and the processed particles P1 drop down against the classification airflow A2 by their own weight and are discharged in a discharge unit 10. The unprocessed particles P0 ride the classification airflow A2 and are blown upward, returning to the cyclone mechanism 7a, and are transferred to a discharge nozzle 8 by the classification airflow A2 or a mixed airflow of the classification airflow A2 and suction airflow from the suction nozzle 6 along with unprocessed particles P0 that have not dropped in the cyclone mechanism 7a, if any. The unprocessed particles P0 transferred to the discharge nozzle 8 move to a discharge section 8a by the airflow of the classification airflow A2 flowing within the discharge nozzle 8, and are blown against an inside wall surface 1a of the processing vessel 1 with the airflow from the discharge section 8a.

Description

Continuous particle production equipment

The present invention relates to a continuous particle production apparatus for continuously producing granulated particles or coated particles in various production fields such as pharmaceuticals, chemicals, foods, agricultural chemicals, feeds, cosmetics, and fine chemicals.

As a device for continuously producing granulated or coated particles, a so-called spray granulation type production device is known in which a raw material liquid in which raw material powder is dispersed or dissolved is sprayed from a spray nozzle in a processing vessel and dried. (Patent Documents 1 to 4 below).

In the apparatus disclosed in Patent Document 1, an ejector having an introduction pipe and a blow pipe for blowing hot air into the introduction pipe is provided below the nozzle for spraying the raw material liquid. Then, with this ejector, the fine particles or small diameter granules in the flow chamber are guided to the vicinity of the nozzle and coated with spray droplets sprayed from the nozzle, and the kinetic energy of the fine particles or small diameter granules in the vicinity of the nozzle is increased. The adhesion between each other is prevented. The particles coated in the flow chamber are sent from the discharge port to the classification mechanism, and the fine particles or small-sized granules that have not reached the predetermined particle size / weight are blown up by the air supplied to the classification mechanism and returned to the flow chamber. It is.

In the apparatus disclosed in Patent Document 2, a means for introducing an air flow downward or obliquely downward along the inner surface of the conical portion is provided near the upper end of the conical portion of the spray drying unit, and the drying adhered to the inner surface of the conical portion. The dry powder after completion of the process is blown off by the air flow introduced from the air flow introduction means and forcibly transferred to the lower fluid granulation section, and also prevents the dry powder from adhering to and depositing on the inner surface of the cone section. ing. A cyclone is interposed in the exhaust line, and fine powder mixed in the exhaust is recovered by the cyclone and returned to the fluidized bed granulation unit.

In the apparatus disclosed in Patent Document 3, a plurality of sets of jet nozzles for blowing high-pressure gas to the fluidized bed of powder in the granulation chamber are provided to suppress aggregation of particles.

In the apparatus disclosed in Patent Document 4, a plurality of nozzles for ejecting fluid are provided on the wall surface of the granulation chamber. The liquid ejected from each nozzle can be switched to gas, liquid, or steam.

Japanese Patent No. 4658652 Japanese Patent Laid-Open No. 2002-45675 Japanese Patent No. 3894686 Japanese Patent No. 3907605

When highly adherent particles such as sticky particles and fine particles having a small particle diameter are granulated or coated in the processing container, the adhesion of the particles to the inner wall surface of the processing container often becomes a problem. In particular, when these particles are wetted by spraying the raw material liquid, the binder liquid or the film liquid, the adhesion to the inner wall surface of the processing container is further increased. And when the particles adhere to the inner wall of the processing container, not only the yield of the granulated or coated product decreases, but the particles adhering to the inner wall of the processing container fall into the processing container and fall into the processing container. It causes the quality to deteriorate.

However,

Patent Documents

1 and 3 do not consider the problem of particle adhesion to the inner wall surface of the processing container. Further, in Patent Document 2, the dry powder adhering to the inner surface of the conical portion of the spray drying unit is blown off by the air flow introduced from the air flow introducing means to prevent the adhering / depositing of the dry powder on the inner surface of the conical portion. However, it is difficult to remove the adherence of highly adherent particles by simply blowing an air stream. Similarly, in Patent Document 4, the powder adhering to the wall surface of the granulation chamber can be removed by ejecting gas from the nozzle. However, the adhesion of particles having high adhesion properties is eliminated only by ejecting the gas. Is difficult.

An object of the present invention is to provide a configuration capable of effectively removing particles adhering to the inner surface of a processing container in an apparatus for continuously producing granulated or coated particles, thereby collecting powder products. To improve the rate and quality.

In order to solve the above-described problems, the present invention provides a processing container, a processing gas introduction unit that introduces a processing gas into the processing container, a raw material liquid that includes a raw material powder, and a binder provided in the processing container. A spray nozzle for spraying one of the liquid and the film liquid, and drying the raw material powder generated continuously or intermittently by drying the raw material liquid sprayed from the spray nozzle in the processing container The particles or particles of the raw material powder that are continuously or intermittently charged into the processing vessel are suspended and flowed by the processing gas and are brought into contact with the processing liquid sprayed from the spray nozzle for granulation or In a continuous particle manufacturing apparatus that performs a coating process and discharges the processed particles after the granulation or coating process is completed, the particles are taken out from the processing container. And a sorting unit that sorts the particles taken out by the particle take-out unit into processed and unfinished particles, and discharge that continuously or intermittently discharges the processed particles sorted by the sorting unit. And a particle return unit that returns the unfinished particles that have been sorted by the sorting unit to the inside of the processing container, and the particle returning unit includes the unfinished particles in the processing container along with an air flow. Provided is a continuous particle manufacturing apparatus characterized by spraying on a wall surface.

In the above-described configuration, the particle return unit may include a discharge nozzle that discharges an air flow including the unprocessed particles in a tangential direction or an up-down direction with respect to an inner wall surface of the processing container.

In the above-described configuration, the particle extraction unit may include a suction nozzle that sucks and takes out particles in the processing container by a suction airflow.

In the above-described configuration, the sorting unit may include a classification mechanism that sorts the particles taken out by the particle take-out unit into treatment-completed particles and treatment-unfinished particles using a classification airflow.

において In the above configuration, the classification mechanism may be connected to the particle take-out portion and the particle return portion via a cyclone mechanism.

According to the present invention, in an apparatus for continuously producing granulated or coated particles, particles adhering to the inner surface of the processing vessel can be effectively removed, thereby improving the yield and quality of the granular product. Improvements can be made.

It is a figure which shows notionally the continuous type particle manufacturing apparatus which concerns on 1st Embodiment. It is the figure which looked at the inside of a processing container from the upper part. It is the figure which looked at the suction nozzle and the discharge nozzle from the side. It is a figure which shows notionally the continuous type particle manufacturing apparatus which concerns on 2nd Embodiment. It is a figure which shows notionally the continuous type particle manufacturing apparatus which concerns on 3rd Embodiment. It is a figure which shows notionally the continuous type particle manufacturing apparatus which concerns on 4th Embodiment. It is a figure which shows notionally the continuous type particle manufacturing apparatus which concerns on 5th Embodiment. It is a figure which shows notionally the continuous type particle manufacturing apparatus which concerns on 5th Embodiment. It is a figure which shows embodiment which installed the gas ejection nozzle in the wall part of the processing container, and is a cross-sectional view of a processing container. It is an expanded sectional view of a gas jet nozzle peripheral part. It is a figure which shows embodiment which installed the rotating plate which has a stirring blade in the bottom part of a processing container, and is a longitudinal cross-sectional view of the bottom part periphery of a processing container. It is the figure which looked at the rotating plate from the upper part. FIG. 10 is a cross-sectional view of the stirring blade taken along the line cc of FIG. 9B. It is a figure which shows notionally the embodiment which installed multiple spray nozzles in the bottom part of a processing container, and is the perspective view which looked at the processing container from diagonally upward. It is the figure which looked at the processing container from the upper part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 conceptually shows a configuration example of a continuous particle manufacturing apparatus according to the first embodiment.

The continuous particle manufacturing apparatus according to this embodiment is mainly composed of a fluidized bed apparatus, and a processing container 1 of the fluidized bed apparatus includes a processing chamber 2 for granulating or coating a granular material, and a processing chamber 2. A solid-gas separation filter unit 3 disposed above and an exhaust chamber (not shown) provided above the filter unit 3 are provided.

A gas dispersion plate 2 a made of a perforated plate (or metal mesh) such as punching metal is disposed at the bottom of the soot treatment chamber 2. The processing gas A1 such as hot air supplied from the gas introduction unit 4 is introduced into the processing container 1 through the gas dispersion plate 2a. Further, a spray nozzle 5 for spraying a processing liquid (raw material liquid, binder liquid or film agent liquid) upward is installed at the bottom of the processing chamber 2. In this embodiment, the spray nozzle 5 sprays a raw material liquid in which the raw material powder is dispersed or dissolved in a binder liquid or a film agent liquid. The fluidized bed apparatus may be a so-called rolling fluidized bed apparatus in which a rotating disk (rolling plate) is installed above the gas dispersion plate 2a via a predetermined gap.

In the inside of the processing container 1, unprocessed particles P0 sorted by a particle take-out unit that takes out the particles P of the granular material from the inside of the processing container 1, in this embodiment, the suction nozzle 6 and the sorting unit 7 described later. A particle return portion that is sprayed onto the inner wall surface 1a of the processing container 1 along with the air flow, in this embodiment, a discharge nozzle 8 is installed. The suction nozzle 6 is connected to a cyclone mechanism 7a of the selection unit 7 to be described later via a suction means such as a suction ejector 9 outside the processing container 1. Further, the discharge nozzle 8 is connected to the cyclone mechanism 7 a outside the processing container 1.

The culm sorting unit 7 includes an upper cyclone mechanism 7a and a lower classification mechanism 7b. The cyclone mechanism 7a swirls the particles P (processed uncompleted particles P0, process completed particles P1) sucked by the suction nozzle 6 and taken out from the inside of the processing container 1 together with the suction airflow (suction air) to increase the flow velocity. The weight is lowered and lowered by its own weight and sent to the classification mechanism 7b. In many cases, the particles P that descend from the cyclone mechanism 7a to the classification mechanism 7b include the unprocessed particles P0 and the process completed particles P1, but depending on the performance of the cyclone mechanism 7a, the particles P0 that are not processed by the cyclone mechanism 7a. It is also possible to sort out the processed particles P1.

において In this embodiment, the classification mechanism 7b sorts the unprocessed particles P0 and the processed particles P1 by the classification airflow (classification air) A2 that blows upward. The processing completion particles P1 selected by the classification mechanism 7b are discharged from the classification mechanism 7b to the discharge unit 10 below. Further, the unprocessed particles P0 selected by the classification mechanism 7b are sent to the discharge nozzle 8 by the classification airflow A2 or the mixed airflow of the classification airflow A2 and the suction airflow from the suction nozzle 6, and the airflow from the discharge nozzle 8 And discharged to the inner wall surface 1a of the processing container 1.

As schematically shown in FIG. 2, the shape and installation state of the suction nozzle 6 are set so that a suction air flow is generated in the tangential direction of the processing container 1 to suck the particles P in the processing container 1. The Further, the form and the installation state of the discharge nozzle 8 are set so that the unfinished particles P0 are blown in a tangential direction on the inner wall surface 1a of the processing container 1 along with the air flow. The discharge portion 8a of the discharge nozzle 8 is preferably formed in a flat shape in a direction perpendicular to the inner wall surface 1a in order to enhance the spraying effect on the inner wall surface 1a of the processing container 1. Further, the discharge portion of the suction nozzle 6 may be formed in the same manner to enhance the suction effect on the particles P.

The raw material liquid sprayed upward from the spray nozzle 5 installed at the bottom of the processing container 1 is dried by the processing gas A1 introduced into the processing container 1, and the raw material powder dispersed or dissolved in the raw material liquid Dry particles are produced. The dry particles come into contact with the liquid picking of the raw material liquid sprayed from the spray nozzle 5 while floating in the processing container 1 by the processing gas A1 introduced into the processing container 1. The droplets of the raw material liquid adhering to the dry particles are dried by the processing gas A1, and the particles of the raw material powder being liquefied are attached to the dry particles as the core, and the particle diameter of the dry particles grows. The dry particles are further brought into contact with the liquid pickling of the raw material liquid sprayed from the spray nozzle 5 while floating in the processing container 1 by the processing gas A1 introduced into the processing container 1, and the particle size is reduced. Grows further. And the process of such particle growth is repeated and the process completion particle | grains P1 (granulated material) with a predetermined particle diameter (or weight) are produced | generated (what is called layering granulation). In addition, you may make it disperse | distribute raw material powder in the processing container 1 in the process.

In the course of the above granulation or coating process, in the processing container 1, unprocessed particles P0 (including raw material particles serving as nuclei) that do not reach a predetermined particle size (or weight), and a predetermined particle size ( Alternatively, the processing completed particles P1 that have reached the weight) are mixed. Therefore, the unprocessed particles P0 and the processed particles P1 are selected, and the processed particles P1 are discharged as a particle product, and the processing is continued for the unprocessed particles P0 to finish the processed particles P1.

The particles P in the processing container 1 in which the unprocessed particles P0 and the processing completed particles P1 are mixed are sucked by the suction air flow of the suction nozzle 6 and transferred to the cyclone mechanism 7a of the sorting unit 7. The particles P transferred to the cyclone mechanism 7a have a reduced flow velocity while swirling in the cyclone mechanism 7a, are lowered by their own weight, and are sent to the classification mechanism 7b. The particles P sent to the classification mechanism 7b are sorted into unprocessed particles P0 and processed particles P1 by the classification air flow A2 that blows upward, and the processed particles P1 descend downward against the classification air flow A2 by their own weight. And discharged to the discharge unit 10. Further, the unprocessed particles P0 are blown upward on the classified airflow A2 and returned to the cyclone mechanism 7a. When there are unprocessed particles P0 that have not moved down the cyclone mechanism 7a, the classified airflow A2, Alternatively, it is transferred to the discharge nozzle 8 by a mixed airflow of the classification airflow A2 and the suction airflow from the suction nozzle 6. The unprocessed particles P0 transferred to the discharge nozzle 8 reach the discharge portion 8a by the airflow of the classified airflow A2 flowing through the discharge nozzle 8 or the mixed airflow of the classified airflow A2 and the suction airflow from the suction nozzle 6. It advances and is sprayed from the discharge part 8a to the inner wall surface 1a of the processing container 1 with the airflow. The powder particles adhering to the inner wall surface 1a of the processing container 1 are effectively wiped off by the air flow blown tangentially to the inner wall surface 1a of the processing container 1 and the processing incomplete particles P0. Returned to fluidized bed. Further, the unfinished particles P0 discharged from the discharge nozzle 8 into the processing container 1 return to the fluidized bed in the processing container 1 after being subjected to the above-described dropping operation, and undergo granulation or coating processing. In order to increase the airflow discharged from the discharge portion 8a of the discharge nozzle 8 and the flow velocity of the unprocessed particles P0 and further increase the effect of removing, a part of the discharge nozzle 8, or the discharge nozzle 8 and the cyclone. A suction unit that generates a suction force toward the discharge unit 8a, for example, a suction ejector, or an air flow supply unit that supplies an air flow toward the discharge unit 8a may be provided at the connection portion with the mechanism 7a. .

By adjusting the flow rate of the classification airflow A2 with a decompression device (for example, 0 to 0.5 MPa) or a flow rate adjusting valve (for example, 0 to 1000 L / min), the particle size (particle diameter) to be selected is appropriately adjusted. can do. Alternatively, the particle size (particle diameter) to be selected by controlling the time during which the classification airflow A2 is introduced into the classification mechanism 7b manually or by a timer device and appropriately adjusting the classification time (for example, 0 to 1 hour). The accuracy can be adjusted as appropriate.

As shown in FIG. 2, in this embodiment, the suction nozzle 6 sucks the particles P in the processing container 1 in the tangential direction of the processing container 1, and the discharge nozzle 8 uses the unprocessed particles P0 as air currents. Along with this, the inner wall surface 1a of the processing container 1 is blown in the tangential direction, and the suction force (suction air flow) by the suction nozzle 6 and the discharge force (discharge air flow) by the discharge nozzle 8 work in the same circumferential direction. . Therefore, a swirl airflow A3 in the direction shown in the figure is generated in the processing container 1 by the suction force (suction airflow) of the suction nozzle 6 and the discharge force (discharge airflow) of the discharge nozzle 8, and the processing container is generated by this swirl airflow A3. The particles P in 1 are dispersed, and generation of coarse particles due to adhesion and aggregation of the particles is prevented. Further, since the movement of the particles is promoted by the swirling airflow A3, the adhesion of the particles to the inner wall surface 1a of the processing container 1 is also suppressed.

The above-described processing operation is performed continuously or intermittently, whereby the processing-completed particles P1 (particle products) are continuously manufactured from the raw material liquid. According to the continuous particle production apparatus of this embodiment, a fine particle product having a small particle size, for example, a fine particle having a particle size of 100 μm or less can be continuously produced with a high yield.

FIG. 3 conceptually shows the continuous particle manufacturing apparatus according to the second embodiment. The continuous particle production apparatus according to this embodiment is substantially different from the continuous particle production apparatus according to the first embodiment in that a plurality of discharge nozzles 8 (three in the example shown in the figure) are installed. It is in. In the example shown in the figure, the discharge nozzles 8 are branched from the common portion 8 b, and the discharge portions 8 a of the discharge nozzles 8 are arranged along the vertical direction of the processing container 1. However, you may comprise so that the discharge part 8a of each discharge nozzle 8 may be installed in the position where the circumferential direction of the processing container 1 differs. Further, at least one discharge nozzle 8 may be individually connected to the cyclone mechanism 7 a of the sorting unit 7. Since other matters are the same as those in the first embodiment, a duplicate description is omitted.

FIG. 4 conceptually shows the continuous particle manufacturing apparatus according to the third embodiment. The continuous particle production apparatus according to this embodiment is substantially different from the continuous particle production apparatus according to the first and second embodiments in that a plurality of suction nozzles 6 (two in the example shown in the figure) are used. It is in the point where it was installed. In the example shown in the figure, each suction nozzle 6 is branched from the common portion 6b. However, at least one suction nozzle 6 may be individually connected to the cyclone mechanism 7 a of the sorting unit 7 via the ejector 9. Since other matters are the same as those in the first and second embodiments, redundant description is omitted.

FIG. 5 conceptually shows a continuous particle manufacturing apparatus according to the fourth embodiment. The continuous particle manufacturing apparatus according to this embodiment is substantially different from the continuous particle manufacturing apparatus according to the first and second embodiments in that the discharge unit 8a of the discharge nozzle 8 is installed downward, and the discharge nozzle 8 is that the unfinished particles P0 are sprayed downward on the inner wall surface 1a of the processing container 1 along with the air flow. The configuration of this embodiment is particularly effective when a so-called Wurster fluidized bed apparatus is used as the fluidized bed apparatus. That is, in the Wurster type fluidized bed apparatus, a draft tube (inner cylinder) is installed above the spray nozzle, and the spray flow (spray zone) of the processing liquid sprayed upward from the spray nozzle is guided upward by the draft tube. . The particles that have risen in the draft tube as a result of the spray flow of the treatment liquid are ejected from above the draft tube, and then the flow velocity is lowered and falls along the inner wall surface 1 a of the treatment container 1. By moving the unfinished particles P0 from the discharge nozzle 8 downward along the inner wall surface 1a of the processing container 1 along with the air flow, the movement of the particles descending along the inner wall surface 1a of the processing container 1 is promoted. The adhesion of particles on the inner wall surface 1a is suppressed. Since other matters are the same as those in the first and second embodiments, redundant description is omitted.

6 and 7 conceptually show a continuous particle manufacturing apparatus according to the fifth embodiment. In this embodiment, the bypass path 7b1 is connected to the upper part of the classification mechanism 7b of the sorting section 7, and the bypass path 7b1 is connected to the second discharge nozzle 8 ′ and the discharge section 10 via a switching valve, for example, the three-way switching valve 11. Connected to the discharge path 10a. The three-way switching valve 11 is configured to block communication between the bypass path 7b1, the second discharge nozzle 8 ′ and the discharge path 10a by electromagnetic force, air pressure, hydraulic pressure, or manual operation, and the bypass path 7b1 and the second path It is possible to switch between a state in which the discharge nozzle 8 ′ is in communication and a state in which the bypass path 7b1 and the discharge path 10a are in communication. An opening / closing valve 12 is interposed between the cyclone mechanism 7a and the classification mechanism 7b of the sorting unit 7. The structure and function of the second discharge nozzle 8 ′ as the particle return unit are the same as or equivalent to those of the discharge nozzle 8 described above. However, instead of the second discharge nozzle 8 ′, a simple connection pipe may be used. The classification mechanism 7b has a structure in which classification airflow (classification air) A2 and the like can be introduced into the inside thereof from below and particles can be retained therein. For example, the lower part of the classification mechanism 7b is composed of a mesh plate provided with a large number of ventilation holes having a predetermined hole diameter, and the classification airflow A2 and the like flow into the classification mechanism 7b through this mesh plate, while the particles Has a structure that cannot pass through the mesh plate. The classification airflow A2 is introduced into the classification mechanism 7b through the main pipeline 13. In this embodiment, the auxiliary pipeline 14 is branched and connected to the main pipeline 13 via the release valve 15. An auxiliary air flow A3 is supplied to the auxiliary pipeline 14.

In the state shown in FIG. 6, the bypass path 7b1 and the second discharge nozzle 8 'communicate with each other by the three-way switching valve 11, and the bypass path 7b1 and the discharge path 10a are blocked. The release valve 12 is open, and the cyclone mechanism 7a and the classification mechanism 7b communicate with each other. Further, the open valve 15 is closed, and only the classification airflow A2 is introduced into the classification mechanism 7b. The particles P sucked by the suction nozzle 6 and sent from the cyclone mechanism 7a of the sorting unit 7 to the classification mechanism 7b are sorted into unprocessed particles P0 and processed particles P1 by the classification airflow A2 blown upward, The processing-completed particle P1 descends downward against the classification airflow A2 by its own weight and stays in the lower part of the classification mechanism 7b. On the other hand, the unprocessed particles P0 are blown upward on the classified air flow A2, and a part of them is transferred from the bypass path 7b1 to the second discharge nozzle 8 'via the three-way switching valve 11, and the rest is the cyclone. It is transferred to the discharge nozzle 8 via the mechanism 7a.

In the sorting operation of the particles P in the sorting unit 7, the particles P descending through the cyclone mechanism 7a are pushed by the momentum of the classification airflow A2 that blows upward from the lower part of the classification mechanism 7b to be lowered to the classification mechanism 7b. Instead, it may flow to the discharge nozzle 8 as it is. In order to prevent this, it is necessary to temporarily weaken or stop the classification airflow A2, which leads to complication of operation. Further, if the classification airflow A2 is temporarily stopped, the mesh plate of the classification mechanism 7b may be clogged. On the other hand, in the continuous particle manufacturing apparatus of this embodiment, as described above, the classified air flow A2 and a part of the processing incomplete particles P0 riding on this are passed from the bypass path 7b1 via the three-way switching valve 11. Since it is transferred (released) to the second discharge nozzle 8 ′, the particles P descending via the cyclone mechanism 7a are smoothly transferred to the classification mechanism 7b, and the sorting operation (classification operation) by the classification mechanism 7b is performed. Done effectively.

A series of steps of taking out the particles P from the processing container 1 by the suction nozzle 6, sorting the particles P by the sorting unit 7, and returning the particles P (P0) to the processing container 1 by the discharge nozzle 8 and the second discharge nozzle 8 ′. When a certain amount of the processing completion particle P1 stays in the lower part of the classifying mechanism 7b by repeating the circulation cycle, the bypass path 7b1 and the second discharge nozzle 8 ′ are switched by switching the three-way switching valve 11 as shown in FIG. Between the bypass path 7b1 and the discharge path 10a. Further, the on-off valve 12 is closed to shut off the cyclone mechanism 7a and the classification mechanism 7b. Further, the opening valve 15 of the auxiliary pipeline 14 is opened, and the auxiliary air flow A3 is supplied from the auxiliary pipeline 14 to the main pipeline 13. As a result, a strong airflow (airflow stronger than the classification airflow A2) obtained by adding the auxiliary airflow A3 to the classification airflow A2 is introduced from the main pipe 13 to the classification mechanism 7b, and the processing completion particles P1 staying in the lower part of the classification mechanism 7b are The classification mechanism 7b is effectively discharged to the discharge unit 10 via the bypass path 7b1, the three-way switching valve 11 and the discharge path 10a.

Instead of the three-way switching valve 11, a two-way switching valve that switches between a state in which the bypass path 7b1 and the second discharge nozzle 8 'are in communication and a state in which the bypass path 7b1 and the discharge path 10a are in communication is used. Also good.

In the above embodiment, as shown in FIG. 8, the gas ejection nozzle 21 may be installed on the wall portion of the processing container 1. In the embodiment shown in the figure, a plurality of, for example, three gas ejection nozzles 21 are installed along the circumferential direction at a predetermined height position of the processing container 1. The predetermined height position where the gas ejection nozzle 21 is installed may be one height position, or may be a plurality of height positions separated in the vertical direction.

Each gas ejection nozzle 21 includes a support tube 21a attached to an installation hole 1b provided in the wall portion of the processing vessel 1 and a nozzle tube 21b inserted into the support tube 21a so as to be movable forward and backward. Configured as The support tube 21a is fixed to the installation hole 1b by an appropriate means such as welding, and the distal end surface 21a1 thereof is flush with the inner wall surface 1a of the processing container 1. The nozzle tube 21b includes a gas passage 21b1 and a nozzle hole 21b3 that communicates with the gas passage 21b1 and opens laterally in the vicinity of the distal end surface 21b2. The gas passage 21b1 is connected to a gas supply port 21c, and a gas pipe connected to a gas supply source (such as a compressed air source) (not shown) is connected to the gas pipe 21c. In the cross section (horizontal cross section) of the processing container 1, the nozzle hole 21b3 is inclined in a predetermined direction with respect to the gas passage 21b1, and is oriented in one circumferential direction along the inner wall surface 1a of the processing container 1. ing. The tip surface 21b2 of the nozzle tube 21b has a curvature along the inner wall surface 1a of the processing container 1, and as shown in FIG. 8B, the nozzle tube 21b is held in the retracted position in the support tube 21a. At this time, the front end surface 21b2 is flush with the front end surface 21a1 of the support tube 21a and the inner wall surface 1a of the processing container 1. When the nozzle tube 21b is held at the retracted position, the tip opening of the nozzle hole 21b3 is blocked by the inner wall surface of the support tube 21a.

The holding of the nozzle tube 21b with respect to the support tube 21a is performed by a set screw 21d that penetrates the wall portion of the support tube 21a and is screwed to the support tube 21a. When the set screw 21d is loosened from the state shown in FIG. 8B and the nozzle tube 21b is moved forward relative to the support tube 21a, the tip surface 21b2 of the nozzle tube 21b is supported as shown in FIG. 8A. The tube 21a slightly protrudes from the tip surface 21a1 to the inside of the processing container 1, and the tip of the nozzle hole 21b3 opens at a position near the inner wall surface 1a of the processing container 1. The set screw 21d is tightened at this position (the advance position of the nozzle tube 21b) to hold the nozzle tube 21b on the support tube 21a. In this state, when compressed gas (compressed air or the like) is supplied to the gas supply port 21c, the compressed gas enters the nozzle hole 21b3 through the gas passage 21b1 and is ejected from the tip of the nozzle hole 21b3 into the processing container 1. To do. As described above, the nozzle hole 21b3 is oriented in one circumferential direction along the inner wall surface 1a of the processing container 1, and the tip of the nozzle hole 21b3 is located near the inner wall surface 1a of the processing container 1. Since it opens, the compressed gas ejected from the nozzle hole 21b3 becomes a swirling flow that flows in the circumferential direction along the inner wall surface 1a of the processing container 1 {see the gas ejection nozzle 21 on the lower side of FIG. 8A}. . Due to the swirling flow of the compressed gas, the particulate particles P adhering to the inner wall surface 1 a of the processing container 1 are effectively removed from the inner wall surface 1 a and returned to the fluidized bed in the processing container 1. Further, when the particles moving in the processing vessel 1 riding on the swirling flow of the compressed gas collide with or come into contact with the inner wall surface 1a, the particles are subjected to a compacting action, and the spheroidization and heaviness thereof are promoted. Is done.

In the above embodiment, as shown in FIG. 9, a rotating plate having a rotating plate having a stirring blade, for example, a boss portion 2 b 1 and a plurality of (for example, three) stirring blades 2 b 2 at the bottom of the processing vessel 1. 2b may be installed. The rotating plate 2b is connected to the rotation drive shaft 2c and rotates in the arrow direction (R direction) shown in FIG. The boss 2b1 has a substantially conical shape and is located at the center of rotation. The stirring blades 2b2 respectively extend from the outer periphery of the boss portion 2b1 in the outer peripheral direction. Further, a mesh net 2d is installed below the rotating plate 2b, and a processing gas such as hot air supplied from the gas introduction unit 4 (see FIG. 1) rotates with the mesh net 2d and the bottom of the processing container 1. It is introduced into the processing container 1 through a gap between the lower surface of the plate 2b and a gap between the inner periphery of the processing container 1 and the outer periphery of the rotating plate 2b.

As shown in FIGS. 9B and 9C, in this embodiment, the rotational front surface 2b21 of the stirring blade 2b2 has predetermined inclination angles α and β. The inclination angle α is an angle formed by the lower edge of the front surface 2b21 in the rotational direction of the stirring blade 2b2 and the tangent S at the outer peripheral side corner of the lower edge, and the inclination angle α is set to 60 to 100 °. Is preferred. Further, the inclination angle β is an angle formed by the rotation direction front surface 2b21 of the stirring blade portion 2b2 and the upper surface of the rotating plate 2b, and the inclination angle β is preferably set to 25 to 45 °.

By installing the rotating plate 2b having the stirring blade 2b2 at the bottom of the processing vessel 1, in particular, by setting the inclination angles α and β of the rotation direction front surface 2b21 of the stirring blade 2b2 to the above values, Along with the rotation, the particles P in the processing container 1 are given a movement that moves in the swiveling direction along the inner wall surface 1a1 of the processing container 1. The movement of the particles P facilitates the suction of the particles P by the suction nozzle 6 (see FIG. 1 and the like), and the particles P are efficiently taken out from the inside of the processing container 1. Then, the particles P are efficiently sent from the suction nozzle 6 (particle take-out unit) to the sorting unit 7 and the effect of sorting (classifying) the particles P by the sorting unit 7 is increased. As a result, the product yield (particles having a desired particle size) Yield). Further, when the particles moving in the swirl direction in the processing container 1 collide with or come into contact with the inner wall surface 1a, the particles are subjected to a consolidation action, and the spheroidization / heavyening of the particles is promoted.

In the above embodiment, as schematically shown in FIG. 10, a plurality of spray nozzles 5 (three in the example shown in the figure) are installed at the bottom of the fluidized bed container 1 to spray the treatment liquid upward. Also good. In this case, the installation position of each spray nozzle 5 is preferably shifted in the circumferential direction with respect to each filter 3 a of the filter unit 3. By installing a plurality of spray nozzles 5, it is possible to simplify the scale-up. Further, by shifting the installation position of each spray nozzle 5 in the circumferential direction with respect to each filter 3a of the filter unit 3, the processing liquid sprayed from the spray nozzle 5 adheres to the filter 3a, and the filter function is lowered. It is suppressed.

In the above embodiment, the positions where the particles P in the processing container 1 are sucked by the suction nozzle 6 are the lower part, the middle part, the upper part of the fluidized bed of particles P and the fluidized bed of the particles P in the processing container 1. Of these positions, at least one position may be set.

In the continuous particle manufacturing apparatus of the above embodiment, the raw material liquid is sprayed into the processing container 1 from the spray nozzle 5 to continuously manufacture the processed particles P1 (particle product). Are continuously or intermittently charged into the processing vessel 1 and sprayed with a binder liquid or a film liquid from the spray nozzle 5 to continuously manufacture processed particles P1 (particle product). Also good. In this case, the spray nozzle 5 can be configured to spray the binder solution or the film agent solution upward, downward, or tangentially. Alternatively, spraying in these directions may be arbitrarily combined.

Moreover, the production | generation of the dry particle | grains of the raw material powder by spraying of the raw material liquid from the spray nozzle 5, the taking-out of the particle | grains by the suction nozzle 6, the selection of the particle | grains by the selection part 7, and discharge | emission of the particle | grains by the discharge part 10 are performed continuously. Or it may be performed intermittently.

DESCRIPTION OF SYMBOLS 1 Processing container 1a Inner wall surface 4 Gas introduction part 5 Spray nozzle 6 Suction nozzle 7 Sorting part 7a Cyclone mechanism 7b Classification mechanism 7b1 Bypass path 8 Discharge nozzle 8 'Second discharge nozzle 10 Discharge part 10a Discharge path 11 Three-way switching valve 12 Open Valve 21 Gas ejection nozzle P Particle P0 Unfinished particle P1 Treated particle

Claims

A processing container, a processing gas introduction part for introducing a processing gas into the processing container, and a processing liquid provided inside the processing container and containing a raw material powder, a binder liquid, and a film liquid. A spray nozzle for spraying a raw material powder continuously or intermittently produced by drying a raw material liquid sprayed from the spray nozzle in the processing container, or continuously in the processing container Alternatively, the raw material powder particles that are intermittently charged are suspended and flowed by the processing gas, and contacted with the processing liquid sprayed from the spray nozzle to perform granulation or coating, and the granulation or coating processing In a continuous particle production apparatus that continuously or intermittently discharges processing-completed particles that have been completed,
A particle take-out unit for taking out particles from the inside of the processing container, a sorting unit for sorting the particles taken out in the particle take-out unit into process-completed particles and unprocessed particles, and the process-completed particles sorted in the sorting unit A discharge unit that discharges the unprocessed particles sorted by the sorting unit, and a particle return unit that returns the unfinished particles returned to the inside of the processing container. A continuous particle manufacturing apparatus characterized by spraying on an inner wall surface of a processing container.
The said particle return part is equipped with the discharge nozzle which discharges the airflow containing the said process incomplete particle | grains to a tangential direction or an up-down direction with respect to the inner wall face of the said process container. Continuous particle production equipment.
The continuous particle manufacturing apparatus according to claim 1 or 2, wherein the particle extraction unit includes a suction nozzle that sucks and takes out particles in the processing container.
The said selection part is provided with the classification mechanism which classify | categorizes the particle | grains taken out by the said particle | grain extraction part into a process completion particle | grain and an unprocessed particle | grain by classification airflow. The continuous particle manufacturing apparatus according to Item.
5. The continuous type according to claim 4, wherein the selection unit includes a cyclone mechanism, and the classification mechanism is connected to the particle extraction unit and the particle return unit via the cyclone mechanism. Particle production equipment.
The sorting unit includes a bypass path connected to an upper part of the classification mechanism, and a second particle return unit capable of communicating with the bypass path, and the bypass path and the second particle return unit are 6. The classified airflow and a part of the unfinished particles are returned to the inside of the processing container through the bypass path and the second particle return unit in a communicated state. The continuous particle manufacturing apparatus according to 1.
The bypass path is connected to the second particle return unit and a discharge path connected to the discharge unit via a switching valve, and the switching valve communicates with the bypass path and the second particle return unit. And a state where the bypass path and the discharge path communicate with each other, and the upper part of the classification mechanism is configured to be opened and closed by an on-off valve at a position above the bypass path, The switching valve communicates the bypass path and the discharge path, and the opening / closing valve introduces an airflow stronger than the classification airflow to the classification mechanism with the upper part of the classification mechanism closed. The continuous particle product according to claim 6, wherein the processing-completed particles staying in the classification mechanism are discharged to the discharge portion by the airflow through the bypass path and the discharge path. Apparatus.
A gas ejection nozzle is installed on the wall of the processing container, and the gas ejection nozzle ejects gas so as to form a swirling flow that flows in a circumferential direction along the inner wall surface of the processing container. The continuous particle manufacturing apparatus according to any one of claims 1 to 7.
The continuous particle manufacturing apparatus according to any one of claims 1 to 7, wherein a rotating plate having a stirring blade is installed at the bottom of the processing vessel.