JP2013071104A - Fluidized bed apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluidized bed apparatus capable of measuring a physical property value of powdery particles with high accuracy without needing a complicated apparatus structure or a movable part and of restraining a fall in yield.SOLUTION: The fluidized bed apparatus includes a translucent window provided at a sidewall of a treatment container, and a particle catching part of a predetermined volume facing the inner surface of the translucent window and accumulating a part of powdery particles floating and flowing in the treatment container. The physical property value of still powdery particles accumulated in the particle catching part is measured from the outer surface side of the translucent window using an optical sensor. Highly accurate measurement can thereby be made, and a fall in yield is restrained.

Description

  The present invention relates to a fluidized bed apparatus that performs granulation, coating, and drying, and more specifically, to measurement of physical property values of powder particles flowing in a processing container.

  A fluidized bed apparatus generally performs granulation, coating, drying, etc. while forming a fluidized bed by floating and flowing powder particles in a processing vessel with a fluidized gas introduced from the bottom of the processing vessel. Yes, it is widely used in fields such as food industry and pharmaceutical industry. The fluidized bed apparatus includes a rolling fluidized bed apparatus in which a rotating body is disposed at the bottom of the fluidized bed processing container and a composite fluidized bed represented by a Wurster fluidized bed apparatus in which a draft tube is installed inside the fluidized bed processing container. A device is also included.

  In the process of granulation, coating, drying, etc. of granular particles using a fluidized bed apparatus, the processed material is processed during the processing process for the purpose of controlling the processing conditions of the processed material, determining the processing end point, etc. (Powder particles) may be sampled, and various physical property values such as particle size, moisture content, and component content may be measured.

  As a technique for sampling an object to be processed and measuring a physical property value in the middle of a treatment process, a technique as disclosed in the following patent document is disclosed.

  In Patent Document 1, a granular material floating and flowing in a processing vessel passes through a laser beam so that the scattered laser beam is collected on a sensor by a lens, and the collected laser beam is used as a basis. A technique for measuring the physical property value of the granular material is disclosed.

  Patent Document 2 discloses particles in which powder particles floating and flowing in a fluidized bed are injected outside a processing container by injecting high-pressure gas from a gas injection nozzle into a powder particle extracting tube penetrating the processing container. A technique is disclosed in which a physical property value of a granular material attached to the pressure-sensitive adhesive film is measured by feeding to a measurement device and attaching to a pressure-sensitive adhesive film provided on the particle-measurement device.

  In Patent Document 3, a granular material that floats and flows in a processing container of a fluidized bed apparatus is accommodated in a particle trap provided in a probe, and after moving the probe to the outside of the processing container, a near infrared sensor A technique for measuring the physical property value of the granular material by using the method is disclosed.

  Non-Patent Document 1 discloses a technique for measuring moisture in a granulated powder that floats and flows in a processing container of a fluidized bed apparatus using a near-infrared sensor through a NIR measurement window provided on a side wall of the processing container. Has been. In this document, purge air is sprayed onto the surface of the NIR measurement window before measurement, and the granulated powder adhering to the vicinity of the window is replaced with the one inside the processing container. At the same time, the NIR spectrum of the granulated powder is measured with the NIR sensor head. To obtain measurements. Thereby, the granulated powder sample which changes continuously is measured, and the moisture value change of the whole fluidized bed is detected.

Japanese Patent No. 3595949 Japanese Patent No. 3827731 JP 2006-136663 A

Summary of “27th Symposium on Formulation and Particle Design (2010)” (published by the Society of Powder Technology) Pages 144-145 “Real-time moisture measurement reflecting the whole batch in fluidized bed granulation process on production scale”

  However, in the technique disclosed in Patent Document 1, the measurement of the physical property value of the granular material is performed on the flowing granular material in the processing container without sampling the granular material, so that the stationary state Compared with the case of measuring the physical property value of the granular material, there is a problem that the measurement accuracy is low and the variation of the measured value is large.

  Moreover, in the technique disclosed in Patent Document 2, since the granular material sampled from the fluidized bed and adhered to the adhesive film cannot be returned to the fluidized bed again (not treated as a product and discarded), In addition to incurring a decrease in yield, a mechanism for intermittently feeding the adhesive film is required, which increases the manufacturing cost of the apparatus.

  In addition, the technique disclosed in Patent Document 3 has a problem that since the measuring device has a movable portion, the structure of the device becomes complicated and the cleaning operation of the device becomes complicated.

  Moreover, in the technique disclosed in Non-Patent Document 1, a granulated powder sample that is continuously replaced by a window for NIR measurement is the object of measurement, and the state of the granulated powder that is the measurement object cannot be kept constant. . Therefore, there is a demerit that the intensity of the reflected light / scattered light cannot always be kept higher than the desired intensity.

  The problem to be solved by the present invention is that a fluidized bed apparatus that does not require a complicated apparatus structure or movable part, can accurately measure the physical property values of the granular particles in the processing vessel, and can suppress a decrease in product yield. Is to provide.

  In order to solve the above-mentioned problems, the present invention introduces a fluidizing gas into a processing container, and granulates, coats, and dries while forming a fluidized bed by floating and flowing powder particles in the processing container. In the fluidized bed apparatus for performing at least one of the treatments, the fluidized bed device includes a particle measuring unit that measures a physical property value of the granular particles, and the particle measuring unit includes a translucent window provided on a side wall of the processing container, A particle trapping part that faces the inner surface of the transparent window and deposits and captures a part of the granular particles that float and flow in the processing container, and the physical property values of the granular particles deposited on the particle trapping part A fluidized bed apparatus comprising an optical sensor for measuring from the outer surface side of the transparent window is provided.

  According to such a configuration, it is possible to measure the physical property values of the granular particles deposited in a stationary state with an extremely simple structure, and thus it is possible to perform highly accurate measurement. Moreover, since the particle measuring unit does not require a movable part and the apparatus structure is simple, the manufacturing cost of the apparatus can be reduced. Furthermore, since the particle measuring unit does not have a movable part, it is easy to clean the inside of the processing container after the processing is completed, and contamination problems are unlikely to occur. In addition, since it is possible to return the granular particles after the measurement to the fluidized bed again, it is possible to suppress a decrease in the yield of the product.

  In the above configuration, the translucent window is attached to a side wall of the processing container via a frame-shaped member, and the particle capturing unit is configured by an inner surface of the translucent window and an inner peripheral surface of the frame-shaped member. It is preferable that it is a concave part.

  In this way, it becomes possible to adjust the deposition thickness of the powder particles (powder particle layer) deposited on the particle trapping portion to a desired value depending on the thickness of the frame-shaped member. It is possible to improve the measurement accuracy of the physical properties of the powder particles.

  In the above configuration, it is preferable that the lower portion of the processing container has a reduced diameter portion that gradually decreases in diameter downward, and the particle measuring portion is provided on a side wall of the reduced diameter portion.

  In this way, it is possible to more easily deposit the granular particles floating and flowing in the processing container on the particle capturing portion. In addition, since the possibility that the granular particles once deposited fall off from the particle trapping portion can be reduced, the accumulated thickness of the accumulated granular particles can be more easily maintained, and further physical properties of the granular particles can be maintained. The measurement accuracy can be improved.

  In the above configuration, the optical sensor may be a visible light sensor, an infrared sensor, a UV sensor, or the like, but is preferably a near infrared sensor.

  In this way, not only the physical properties indicating the morphological properties such as the particle diameter of the granular particles, but also the composition properties such as the component content, moisture content, and the elution performance such as the coating amount of the coating component on the core particles, etc. It is also possible to measure physical property values representing chemical properties. Here, the physical property values include the particle diameter, particle shape, particle size distribution, component content (component concentration), coating amount, moisture content, and the like of the granular particles, and the same applies to the following description.

  Said structure WHEREIN: It is preferable that the said particle | grain capture | acquisition part is provided with the gas ejection means which can eject the gas to this particle | grain capture | acquisition part, and its stop.

  In this way, the particulate particles can be deposited on the particle capturing portion in a state where the gas ejection by the gas ejecting means to the particle capturing portion is stopped, so that the particulate particles can be easily captured. It becomes possible. In addition, the captured particulate particles are smoothly returned to the fluidized bed by ejecting gas from the gas ejection means to the particulate particles that have been captured by the particle capturing section and have finished measuring the physical property values. It becomes possible.

  Further, in order to solve the above problems, the present invention introduces a fluidized gas into a processing container, and floats and flows the granular particles in the processing container to form a fluidized bed while granulating and coating In addition, in the method for treating granular particles, wherein at least one treatment of drying is performed, a translucent window provided on a side wall of the processing vessel, an inner surface of the translucent window, and a floating flow in the processing vessel A particle capturing part for depositing and capturing a part of the granular particles to be collected, an optical sensor for measuring the physical property value of the granular particles deposited on the particle capturing part from the outer surface side of the light transmission window, and the particles Using a particle measuring device provided with a gas jetting means capable of jetting gas to the trapping section and stopping the gas, the powder particles are deposited on the particle trapping section, and the photosensor detects the powder particles. After measuring the physical property value, the particle trapping section is formed by the gas ejection means. The deposited the granular particles to provide a processing method of the granule particles having a step of returning to said fluidized bed.

  Also by such a method, it is possible to receive the same operation and effect as the matters already described in the operation related to the above description of the apparatus.

  In addition, the present invention introduces a fluidized gas into a processing container, floats and flows the powder particles in the processing container to form a fluidized bed, and performs at least one of granulation, coating, and drying. A translucent window structure that is attached to the side wall of the processing vessel of a fluidized bed apparatus to be performed, and is attached to the outer periphery of the translucent window and the translucent window, and is a frame shape for attaching the translucent window to the side wall of the processing vessel A member, and a concave portion constituted by the inner surface of the light-transmitting window and the inner peripheral surface of the frame-shaped member, and the inner surface of the frame-shaped member is formed by an inclined surface inclined downward from the outer periphery toward the inner periphery. To provide a configuration. The translucent window structure of the present invention preferably includes a gas ejection part for ejecting gas toward the concave part.

  According to the fluidized-bed apparatus which concerns on this invention, since the physical-property value measurement of the granular material particle | grains deposited with the simple structure can be performed in a stationary state, a highly accurate measurement is attained. Moreover, since the particle measuring unit does not require a movable part and the apparatus structure is simple, the manufacturing cost of the apparatus can be reduced. Furthermore, since the particle measuring unit does not have a movable part, it is easy to clean the inside of the processing container after the processing is completed, and contamination problems are unlikely to occur. In addition, since it is possible to return the granular particles after the measurement to the fluidized bed again, it is possible to suppress a decrease in the yield of the product.

It is a figure showing an example of 1 composition of a fluid bed apparatus concerning an embodiment. It is an enlarged view of the diameter-reduction part 3 of the processing container in the fluidized bed apparatus of the example of 1 structure shown in FIG. FIG. 3 is a diagram {FIG. 3A) of the particle trapping unit C viewed from the inside of the processing container 2, and FIG. 3B is a diagram of FIG. 3B viewed from the outside of the processing container 2. 3A and 3B are cross-sectional views taken along the line A-A 'in FIG. 4A and FIG. 3B are cross-sectional views taken along the line B-B in FIGS. 3A and 3B.

  Hereinafter, a configuration example of a fluidized bed apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  First, based on FIG. 1, the structure of the fluidized bed apparatus 1 which concerns on embodiment is demonstrated. An air supply chamber 5 for introducing a fluidizing gas F such as hot air into the processing container 2 is provided at the lower end of the fluidized bed apparatus 1, and is formed by the fluidizing gas F in the processing container 2. A spray nozzle 6 that sprays a spray liquid toward the fluidized bed and that can move up and down is provided. In addition, a reduced diameter portion 3 whose cross-sectional area is gradually reduced in diameter is provided at the lower portion of the processing container 2, and a particle measuring portion 4 that measures a physical property value of the granular particles M is provided on a side wall of the reduced diameter portion 3. Is provided.

  Next, details will be described by taking as an example a case where granulation is performed using the fluidized bed apparatus 1. In addition, although the case where granulation is performed is mentioned here as an example, the fluidized bed apparatus according to the present invention can be used for processes other than granulation such as coating and drying.

  First, the fluidizing gas F is introduced from the supply chamber 5 into the processing container 2 through a gas dispersion plate (not shown). Here, as the gas dispersion plate, a perforated plate such as a punching metal or a wire mesh can be used.

  Due to the fluidized gas F introduced, a fluidized bed of powder particles M is formed in the processing vessel 2. Then, a spray liquid such as a binder liquid is sprayed from the spray nozzle 6 to the granular particles M that float and flow in the processing container 2. The powder particles M are wetted, adhered, agglomerated and dried by spraying the spray liquid. By repeating this adhesion and condensation in the fluidized bed, the granular particles M grow into particles having a predetermined particle diameter.

  For the granular particles M that grow in particle size in the fluidized bed, for example, the physical property value of the granular particles M is measured by the particle measuring unit 4 for the purpose of controlling the processing conditions and determining the processing end point. . In addition, the measurement of the physical property value of the granular particles M by the particle measuring unit 4 is performed while maintaining the floating flow state of the granular particles M in the processing container 2.

  Next, the configuration of the particle measuring unit 4 that measures the physical property values of the granular particles M will be described with reference to FIGS. 2 and 3.

  As shown in FIG. 2, the particle measuring unit 4 provided in the reduced diameter portion 3 of the processing container 2 deposits and captures a part of the granular particles M that float and flow in the processing container 2. C and the optical sensor 20 that measures the physical property value of the granular particles M captured by the particle capturing unit C. The particle trapping part C and the optical sensor 20 are fixed to the reduced diameter part 3 of the processing container 2 by a clamp 21. The particle trapping part C has a configuration described below, and is attached to the opening of the reduced diameter part 3 while being pressed by the clamp 21.

  3 and 4 show the particle trapping part C. FIG. 3A is a view of the particle trapping unit C as viewed from the inner side of the processing container 2 (an arrow view in the X direction of FIG. 4A), and FIG. It is the figure {Y direction arrow view figure of Fig.4 (a)} seen from the outer side direction. 4A is a cross-sectional view taken along the line A-A 'in FIGS. 3A and 3B, and FIG. 4B is a cross-sectional view taken along the line B-B' in FIGS. 3A and 3B. 4 shows a state in which the particle trapping portion C is viewed from the back side of the paper in FIG. 2 (the direction is opposite to that in FIG. 2).

  The particle trapping part C is composed mainly of a translucent window 10 made of a transparent material such as transparent glass or resin, and a frame-like member 11 attached to the outer periphery of the translucent window 10. As shown in FIG. 4A, the frame-shaped member 11 has a flange portion 11a protruding to the inner peripheral side, and the translucent window 10 has an inner periphery of the frame-shaped member 11 and one surface of the flange portion 11a (outside The frame-shaped member 11 is attached in a state of being in contact with the surface. And the fixing member 32 is attached to the frame-shaped member 11 via the O-rings 33 and 34 so that the translucent window 10 may be pinched | interposed between the collar parts 11a, and is fixed with the volt | bolt 31. Further, the inner surface including the flange portion 11a of the frame-shaped member 11 is formed on an inclined surface 11b that is inclined downward from the outer periphery toward the inner periphery. In the particle trapping portion C having such a configuration, a concave portion C1 having a predetermined volume is formed by the inner surface of the translucent window 10 and the inner peripheral surface of the frame-shaped member 11 (the inner peripheral surface of the flange portion 11a). The granular particles M floating and flowing inside enter the concave portion C1 when descending along the inner wall surface of the reduced diameter portion 3 or the vicinity thereof, and further accumulate at a predetermined thickness in the particle trapping portion C. ing. Here, the shape of the particle trapping part C is such that the granular particles M floating and flowing in the processing container 2 are induced to easily capture the granular particles M in an amount (thickness) necessary for measuring physical properties. Further, the shape is such that the granular particles M captured by the particle capturing portion C by the purge air P described later can be easily returned to the fluidized bed, and the inner surface of the processing container 2 is not uneven as much as possible. It is preferable to make it. Therefore, the specification of the particle capturing part C can be set as follows, for example.

  The depth h1 of the concave portion C1 (corresponding to the thickness of the granular particles M deposited on the concave portion C1) is, for example, 0.5 mm to 10 mm, and the translucent window measured from the outermost diameter portion of the inclined surface 11b. The depth h2 of the inner surface of 10 is, for example, 0.5 to 50 mm, preferably 3 to 50 mm. In a state where the particle trapping part C is mounted on the reduced diameter part 3, the inner surface of the light transmission window 10 forms an angle θ with the horizontal plane S (see also FIG. 2), and this angle θ is, for example, the inner wall surface of the reduced diameter part 3 It is the same as the angle formed with the horizontal plane S (this angle is the same or approximately the same as the inner wall surface of the reduced diameter portion of the processing vessel in a general fluidized bed apparatus). The angle θ is, for example, 45 ° to 80 °, preferably 60 ° to 80 °. In addition, the angle β formed by the inclined surface 11b with the inner surface of the transparent window 10 is preferably 5 to 50 °. Here, the angle α formed by the inclined surface 11b with the horizontal plane S is different between the upper side and the lower side, and the upper side angle α2 is larger than the lower side angle α1. Of the angle α formed by the inclined surface 11b and the horizontal plane S, α1 (α1 = θ−β) is easy to stop the granular particles M at the particle capturing portion C, and the granular particles M are captured by purge air. The angle may be any angle as long as it is easy to return from the part C to the fluidized bed, and preferably 20 ° to 70 °. As one embodiment of the angle α1, when using the present invention, α1 can be determined with reference to the characteristics of the granular particles M, for example, the angle of repose. Further, the angle α2 may be larger than θ and smaller than θ + 90 °, but it is preferable in terms of simplicity of manufacturing the device that the inclination angle β of the inclined surface 11b is equal in each part on the circumference. Furthermore, (alpha) 2 should just be an angle which the granular material particle | grains M enter the particle | grain supplement part C easily, Preferably it is 70-120 degrees.

  By setting the depth h1 of the concave portion C1 to the above value, it is possible to capture the amount (thickness) of the granular particles M necessary for measuring the physical property value. Further, by setting the angle θ of the inner surface of the transparent window 10 with respect to the horizontal plane S to the above value and setting the angle α (α1, α2) of the inclined surface 11b with respect to the horizontal plane S to the above value, The granular particles M floating and flowing can be smoothly guided to the concave portion C1, and the granular particles M deposited in the concave portion C1 can be smoothly returned to the fluidized bed by the purge air P described later. In particular, the angle α of the inclined surface 11b with respect to the horizontal plane S is such that the upper angle α2 is larger than the lower angle α1, so that the granular particles M floating and flowing in the processing container 2 can be more smoothly formed into the concave portion C1. Can be guided. Moreover, such a particle | grain capture | acquisition part C is a shape that an unevenness | corrugation does not arise in the inner surface of the processing container 2 as much as possible, there is no excessive accumulation of the granular material particle | grains M, and washing | cleaning operation | work is also easy. is there.

  In addition, when it is necessary to measure the angle of repose of the powder, any method can be used as long as it is a commonly used method. For example, a standard measurement method for a powder tester PT-S model manufactured by Hosokawa Micron Corporation. Can be used. That is, parts are attached to the vibration table in the order of funnel, space ring, sieve, fluosae, and osabae, and a table for measuring the angle of repose is installed below the parts. After the equipment is installed, the powder raw material is put on the sieve. After the charging, the vibration plate of the apparatus is gradually vibrated, and the powder is supplied onto the angle of repose measurement table via the sieve / funnel within the range where the amplitude of the diaphragm is less than 2 mm. When powder starts to spill from around the angle of repose measurement table, the amplitude is slightly reduced to reduce the powder flow rate. When the angle of repose on the table reaches a certain level, the vibration is stopped and the angle of repose is measured by an image analysis system built in the apparatus. The above operation is repeated three times, and the average value is used as the angle of repose of the powder. As described above, the instrument configuration for measurement may be the standard setting of PT-S, but the instrument configuration may be changed depending on the particle diameter of the raw material powder. A sieve having a mesh size of 710 μm or more is usually used for supplying the powder. When the raw material powder has a large particle diameter and is allowed to pass through a 710 μm sieve, if the powder remains over 20% by weight on the sieve, the raw material powder is poured directly into the funnel with a scoop.

  As shown in FIGS. 3 (b) and 4 (b), a part of the abutting portion between the light transmission window 10 and the frame-like member 11 contains the granular particles M, whose physical property values have been measured, as gas. For example, a gas ejection part D for returning from the particle trapping part C to the fluidized bed by the ejection of the purge air P is provided. The gas ejection part D includes an air supply port 12 that supplies purge air P and an air chamber 13 that communicates with the air supply port 12. The purge air P supplied from the air supply port 12 passes through the air chamber 13 and is ejected toward the center of the concave portion C1. As shown in FIG. 3B, in this embodiment, the gas ejection part D is provided at two locations below the particle capturing part C, but the gas ejection part has a function described in this specification. The structure, shape, number of arrangement, arrangement mode, and the like can be appropriately changed.

  The granular particles M floating and flowing in the processing container 2 are captured by the particle capturing unit C and accumulated in the concave portion C1 with a predetermined thickness. And the various physical property values, such as a moisture content and a component content (component concentration), are measured by the optical sensor 20 with respect to the granular material particle | grains M deposited with the predetermined thickness in the recessed part C1. The light projecting unit and the light receiving unit of the optical sensor 20 are in a positional relationship such that the reflected light of the measurement light projected from the light projecting unit (the reflected light reflected from the inner surface of the transparent window 10) is not received by the light receiving unit. ing. For example, the optical axis of the light projecting unit and the optical axis of the light receiving unit are shifted from each other by a predetermined angle in the range of 3 to 30 °.

  Next, based on FIG. 4, the measuring method of the physical property value of the granular material particle | grains M by the particle | grain measuring part 4 is demonstrated.

  As shown in FIG. 4 (a), the particulate particles M deposited and captured in the particle capturing unit C have a predetermined deposition thickness depending on the thickness of the frame-shaped member 11. C is captured by C (concave portion C1). Thereby, the measurement accuracy of the physical property value by the optical sensor 20 is improved, and the variation in data can be reduced. Here, the thickness of the frame-shaped member 11 is preferably variable by changing to a frame-shaped member having a different thickness.

  The granular particles M captured by the particle capturing part C (concave part C1) are measured by an optical sensor 20 provided outside the reduced diameter part 3, and the measured data is transmitted by a transmission means such as an optical fiber. Is transmitted to an arithmetic processing device (not shown), and spectrum analysis of the reflected light reflected from the granular particles M is performed by the arithmetic processing device. And the physical property value of the granular material particle | grain M is calculated | required based on this spectrum analysis.

  Here, the optical sensor 20 is preferably a near infrared sensor. By using a near-infrared sensor, not only the physical properties indicating the morphological properties such as the particle size of the granular particles M but also the elution such as the compositional properties such as the component content and moisture content and the coating amount of the coating component on the core particles It is also possible to measure physical property values representing chemical properties such as performance.

  As shown in FIG. 4 (b), the granular particles M whose physical property values have been measured are trapped by the purge air P ejected from the gas ejection portion D between the translucent window 10 and the frame-shaped member 11. It is blown away from the part C (concave part C1) and returned to the fluidized bed. The purge air P of the gas ejection part is supplied from the air supply port 12 by an air supply source (not shown). Thus, the fall of the yield of a product can be suppressed by returning the granular material particle | grains M supplemented to the particle | grain capture part C to a fluidized bed again after a measurement.

  In addition, the gas ejection part D is added when returning the granular material particles M after measurement from the particle capturing part C to the fluidized bed, and at the time of non-measurement (when capturing of the granular material particles and measurement of physical property values are not performed). In addition, it is preferable that the purge air P is ejected. In this way, since the granular particles M are not deposited on the particle trapping part C at the time of non-measurement, it is possible to suppress a decrease in product yield. In other words, when the gas ejection part D measures the physical property value of the granular particle M captured by the particle capturing part C, a predetermined amount (thickness) of the granular particle M is measured when measuring the physical property value. When depositing on the trapping part C, it is preferable to stop the ejection of the purge air P (depending on the physical properties of the granule particle M or the like, when depositing the granule particle M on the particle trapping part C) In addition, the ejection of the purge air P may not be stopped). In addition, in FIG. 3, although the particle | grain capture | acquisition part C is circular shape, you may change a shape suitably not only this.

  The present invention can be applied to a composite fluidized bed apparatus represented by a rolling fluidized bed apparatus and a Wurster fluidized bed apparatus in addition to the normal fluidized bed apparatus shown in FIG.

DESCRIPTION OF SYMBOLS 1 Fluidized bed apparatus 2 Processing container 3 Reduced diameter part 4 Particle | grain measuring part 5 Air supply chamber 6 Spray nozzle 10 Translucent window 11 Frame-shaped member 12 Air supply port 20 Optical sensor 31 Bolt 32 Fixing member 33 O-ring 34 O-ring C particle Trapping part C1 Concave part D Gas ejection part P Purge air M Powder particles F Fluidized gas

Claims (8)

In a fluidized bed apparatus for introducing at least one of granulation, coating, and drying while introducing a fluidized gas into a processing container and floating and flowing powder particles in the processing container to form a fluidized bed ,
A particle measuring unit for measuring physical properties of the powder particles,
The particle measuring unit deposits and captures a transparent window provided on a side wall of the processing container and a part of the granular particles that face the inner surface of the transparent window and float and flow in the processing container. A fluidized bed apparatus comprising: a particle capturing unit that performs measurement, and an optical sensor that measures a physical property value of the granular particles deposited on the particle capturing unit from an outer surface side of the light transmission window.   The translucent window is attached to the side wall of the processing container via a frame-shaped member, and the particle trapping portion is a concave portion configured by an inner surface of the translucent window and an inner peripheral surface of the frame-shaped member. The fluidizing device according to claim 1, wherein   The lower part of the processing container has a reduced diameter part that gradually decreases in diameter downward, and the particle measuring part is provided on a side wall of the reduced diameter part. Fluidized bed equipment.   The fluidized bed apparatus according to claim 1, wherein the optical sensor is a near infrared sensor.   The fluidized bed apparatus according to any one of claims 1 to 4, wherein the particle trapping unit is provided with gas jetting means capable of jetting gas to the particle trapping unit and stopping the gas trapping unit. Powder particles for introducing at least one of granulation, coating, and drying while introducing a fluidized gas into the processing container and floating and flowing the powder particles in the processing container to form a fluidized bed In the processing method of
A translucent window provided on the side wall of the processing container; a particle capturing unit that deposits and captures part of the granular particles that face the inner surface of the translucent window and float and flow in the processing container; An optical sensor for measuring the physical property value of the granular particles deposited on the particle trapping portion from the outer surface side of the light transmission window, and a gas jetting means capable of jetting and stopping the gas to the particle trapping portion. Using a particle measuring device
After the powder particles are deposited on the particle trapping part and the physical property value of the powder particles is measured by the optical sensor, the powder particles deposited on the particle trapping part by the gas ejection means A method for treating granular particles, comprising a step of returning to the fluidized bed. A fluidized bed apparatus for introducing at least one of granulation, coating, and drying while introducing a fluidizing gas into a processing vessel and floating and flowing powder particles in the processing vessel to form a fluidized bed. A translucent window structure attached to a side wall of the processing vessel,
A translucent window, a frame-shaped member attached to the outer periphery of the translucent window, for attaching the translucent window to a side wall of the processing container, an inner surface of the translucent window, and an inner peripheral surface of the frame-shaped member; A translucent window structure characterized in that the inner surface of the frame-like member is formed with an inclined surface inclined downward from the outer periphery toward the inner periphery.   The translucent window structure according to claim 7, further comprising a gas ejection portion for ejecting gas toward the concave portion.

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