JP2010094675A5 - - Google Patents

Description

Granulator

  The present invention relates to a granulating apparatus for producing a large-diameter granule by growing a powder to a predetermined particle size or more.

  Conventionally, as this type of granulating apparatus, a so-called “Worster type” fluidized bed apparatus is known. Specifically, by placing a cylinder open at both ends in the center of the granulation container and generating an upward air flow inside the cylinder, the center, ceiling, and side of the granulation container In addition, a circulating gas flow that circulates in the order of the bottom part and the central part is generated, the powder is put on the circulating gas stream and circulated, and the medicine is sprayed onto the powder in the cylinder so that the powders are agglomerated or powdered. The surface of the body is coated (for example, see Non-Patent Document 1).

JPO, “Standard Technology Collection”, Agrochemical formulation technology (B-1- (4) coating technology), [online], [Searched on December 7, 2007], Internet [URL: http: //www.jpo .go.jp / shiryou / index.htm]

  By the way, in the conventional granulator described above, the bottom of the granulation vessel is closed, and large-diameter particles that have grown beyond a predetermined particle size and separated from the circulating gas flow accumulate at the bottom of the granulation vessel. For this reason, the powder that is circulating in the granulation vessel further adheres to the large-diameter particles accumulated at the bottom, and some of the large-diameter particles become excessively large. This could happen.

  As a means for solving this problem, it is conceivable to provide a discharge port for discharging large-diameter particles grown to a predetermined particle size or more at the bottom of the processing vessel, but simply providing a discharge port open to the atmosphere. Then, the gas in the granulation vessel escapes, and the circulating gas flow may become unstable or the circulating gas flow itself may not be generated.

  This invention is made | formed in view of the said situation, and aims at provision of the granulation apparatus which can improve the uniformity of a particle size.

Granulating apparatus according to the invention of claim 1 has been made in order to achieve the above object, it produces a circulating gas stream circulating inside the granulation vessel, the circulating put the powder into the circulating gas stream, By applying heat, ions, or mist-like adsorbent to the powder in the course of the circulating gas flow, the powder adheres to each other, or a layer of adsorbent is grown on the surface of the powder, and the predetermined particle size In the granulation apparatus for producing the large-diameter particles grown as described above, a recovery hole formed through the bottom of the granulation vessel and through which the large-diameter particles separated from the circulation gas flow by its own weight can pass, A recovery container which is disposed below and communicates with the inside of the granulation container through the recovery hole and which is entirely closed except for the particle recovery hole, and a large diameter which is provided in the recovery container so as to be openable and closable and accommodated in the recovery container. and a takeout granules for taking out the granules, the granulation vessel, and the horizontal direction A cylindrical chamber extending along a direction inclined with respect to the horizontal direction, an upper communication port formed in the upper portion of the cylindrical chamber and extending in the axial direction of the cylindrical chamber, and an upper communication port disposed above the cylindrical chamber. An upper chamber communicated with the inside of the cylindrical chamber through the mouth, a gas discharge hole provided in the upper chamber and communicated with the outside of the granulation container through the filter, and an inner curved surface of the cylindrical chamber provided in the cylindrical chamber. And a gas ejection part that generates a circulating gas flow that circulates along the inner curved surface of the cylindrical chamber and has a recovery hole disposed at the lower end of the cylindrical chamber. . " Granulation" includes the production of large-diameter particles by agglomerating powders, and the formation of large-diameter particles by coating the surface of the powder with an adsorbent (coating) and growing the coating layer. Includes those that make the body.

According to a second aspect of the present invention, in the granulation apparatus according to the first aspect, the bottom of the cylindrical chamber is inclined so as to descend from one end in the longitudinal direction toward the other end, and a recovery hole is formed through the other end. It has the characteristics where it was done .

The invention of claim 3 is the granulation apparatus according to claim 1 or 2, wherein the powder supply apparatus is provided in the upper chamber and is capable of continuously supplying powder into the cylindrical chamber through the upper communication port. It has the feature in having provided .

The invention of claim 4 comprises a gas ejection part for generating a circulating gas flow circulating inside the granulation container, and an ion applying means for applying ions to the powder circulating on the circulating gas flow, It is characterized in that a large-diameter grain that has grown to a predetermined particle size or more is produced by electrically adhering the powders to which no .

[Invention of Claim 1]
According to the granulating apparatus according to the invention of claim 1 configured as described above, the powder circulates and flows so as to swirl on the circulating gas flow circulating in the cylindrical chamber. In the process, when heat, ions, or mist-like adsorbents are added to the powder, the particle size gradually increases as the powder adheres to each other or a layer of adsorbent adhering to the surface of the powder grows. Become. The large-diameter particles that have grown to a predetermined particle size or more are separated from the circulating gas flow by their own weight, and are discharged to the collection container through the collection holes arranged at the lower end of the cylindrical chamber . That is, the large-diameter particles are not accumulated in the granulation container, but are discharged to the outside of the granulation container through the collection hole, so that the circulating powder is separated from the large-diameter particles separated from the circulation gas flow. It is possible to prevent further adherence of the body, granules and adsorbing substances, and improve the uniformity of the particle diameter.

  In addition, the large-diameter particles recovered in the recovery container can be taken out from the particle outlet, while the granule outlet is closed while the circulating gas flow is generated, The gas outflow from the gas is prevented, and the circulating gas flow generated in the granulation vessel can be stabilized.

[Invention of claim 2]
According to the second aspect of the invention, the large-diameter particles separated from the circulating gas flow are directed to the recovery hole by the inclination of the bottom of the cylindrical chamber.

[Invention of claim 3]
According to invention of Claim 3, a large diameter granule can be manufactured continuously. Here, the powder supply device keeps the amount of powder in the granulation container almost constant without excess or deficiency by replenishing the amount of powder discharged from the granulation container as large-diameter particles. Can be manufactured continuously and stably.

[Invention of claim 4]
According to the fourth aspect of the present invention, when granulation is performed by spraying a chemical solution, a necessary drying process is not necessary. Moreover, the situation where powder adheres to the wall surface of a granulation container by the chemical | medical solution which hangs down the wall surface of a granulation container can be avoided.

Side sectional view of the granulation container according to the first embodiment of the present invention . Cross section of powder feeder Expanded cross-sectional view of the powder feeder Perspective view of revolving member in container Scraper perspective view Perspective view of the top bottom wall Cross-sectional perspective view of bottom wall at the bottom Cross section of bottom wall at the bottom Perspective view of the top bottom wall Perspective view of bottom wall at the bottom Cross-sectional perspective view of granulation container Perspective view of distribution supply device Sectional drawing of a flexible tube in a state where the first opening / closing chuck is closed and large-diameter particles are accumulated Sectional drawing of a flexible tube in a state where a large-diameter granule has moved to a closed portion by a second opening / closing chuck Sectional view of the flexible tube immediately after the first opening / closing chuck is closed Sectional drawing of the flexible tube in a state where the second opening / closing chuck is opened and large-diameter particles are discharged Sectional drawing of the rotary valve which concerns on a modification (3) Sectional drawing of the tube made from resin film which concerns on a modification (4) The perspective view of the powder supply apparatus which concerns on a modification (5)

[First Embodiment]
DESCRIPTION granulator 100 of the present invention will be described with reference to FIGS. 1-16. As shown in FIG. 1, a granulating apparatus 100 includes an apparatus main body 400 for granulating large-diameter particles having a predetermined particle diameter or more from raw material powder, and a raw material powder for supplying the apparatus main body 400 with raw material powder. It can be divided into the powder supply apparatus 20 and a measuring instrument ( specifically, a platform scale ) ( not shown) for measuring the weight of the large-diameter particles discharged from the apparatus main body 400 .

  First, the powder supply apparatus 20 will be described. As shown in FIG. 2, the powder supply apparatus 20 includes a powder container 21 that contains raw material powder. The powder container 21 includes a large-diameter cylindrical portion 22, a small-diameter cylindrical portion 23, and a powder discharge cylindrical portion 24, and has a structure that is reduced in diameter as it goes downward. The lower end portion of the side wall of the large diameter cylindrical portion 22 and the upper end portion of the side wall of the small diameter cylindrical portion 23 are connected by a flat horizontal step wall 25, and the powder discharge cylindrical portion 24 is connected to the small diameter cylindrical portion 23. Screwed to the outside. Then, the powder is discharged from the lower surface opening of the powder discharge cylinder portion 24.

  The upper end of the powder container 21 (large diameter cylindrical portion 22) is open, and is closed by an upper end cap 26 that is screwed to the outer peripheral surface of the upper end. A motor 27 that is driven and controlled by a control device (not shown) is fixedly placed at the center of the upper surface of the upper end cap 26. The rotary shaft 27A connected to the motor 27 extends through the upper end cap 26 along the central axis of the large diameter cylindrical portion 22 and the small diameter cylindrical portion 23. The rotating shaft 27A has a hexagonal columnar shape with a stepped lower side from the intermediate portion, and a container inner disk 28 is attached to the lower end portion of the thick shaft portion so as to be integrally rotatable.

  The in-container disk 28 is disposed so as to overlap the upper surface of the horizontal step wall 25, and loosely fits in the large-diameter cylindrical portion 22 so as to cover the upper surface opening of the small-diameter cylindrical portion 23 and the periphery of the horizontal step wall 25. is doing. Specifically, the container inner disk 28 is formed of a flat disk having a diameter smaller than the inner diameter of the large diameter cylindrical portion 22 and larger than the inner diameter of the small diameter cylindrical portion 23, and the upper surface of the horizontal step wall 25. It is mounted horizontally away from the top.

  In order to scrape the powder deposited on the inner disc 28 into an annular gap between the peripheral edge of the inner disc 28 and the side wall of the large diameter cylinder portion 22, an inner surface is placed on the inner surface of the large diameter cylinder portion 22. A guide 29 is provided. As shown in FIG. 2, the upper surface standby guide 29 has a plate shape bent in an L shape. The horizontal plate 29A of the upper surface standby guide 29 is disposed adjacent to the upper surface of the in-container disk 28, and a vertical plate 29B extending vertically upward from the base end portion of the horizontal plate 29A is fixed to the upper end cap 26.

  Then, by attaching the flat surface on the front end side of the horizontal plate 29A to the side surface of the rotation shaft 27A, the horizontal plate 29A is inclined with respect to the rotation direction of the inner disc 28, and when the inner disc 28 is rotated, The powder on the container inner disk 28 is blocked by the horizontal plate 29A and guided toward the outer edge of the container inner disk 28. Further, since the base end portion of the horizontal plate 29A extends to a position outside the outer edge portion of the inner disc 28, the powder guided by the horizontal plate 29A is transferred to the outer edge portion of the horizontal step wall 25, that is, the horizontal step wall. It is made to flow down to 25 A of cyclic | annular deposition parts provided along the outer edge part of the disk 28 in a container among the upper surfaces of 25. FIG. Furthermore, since the upper surface standby guide 29 agitates the powder in the powder container 21, it is possible to prevent the powder from solidifying in the large diameter cylindrical portion 22. As a result, the powder on the in-container disk 28 can stably flow down to the annular deposition portion 25A.

  The powder that has flowed down to the annular deposition portion 25A by the upper surface standby guide 29 forms a powder pile having a predetermined angle of repose between the inner disk 28 and the horizontal step wall 25. The angle of repose of the peak of the powder is constant depending on the type of powder, and it is possible to prevent excessive powder from being supplied from the inner disk 28 to the horizontal step wall 25. That is, the powder can be dammed between the inner disk 28 and the upper surface of the horizontal step wall 25 so that the powder does not collapse into the small diameter cylindrical portion 23.

  The crest of the powder deposited on the annular depositing portion 25 </ b> A is scraped off by the in-container turning member 30 rotating in the large-diameter cylindrical portion 22 and sent to the small-diameter cylindrical portion 23. The in-container turning member 30 is fixed to the rotating shaft 27A. As shown in FIG. 4, the cantilever-shaped powder collecting blades 32 and the dusting blades 33 are formed laterally from the axial center plate 31 through which the rotating shaft 27A passes. Is extended. These dust collection wings 32 and dust wings 33 rotate in a horizontal plane while being in sliding contact with the upper surface of the horizontal step wall 25 (see FIG. 3).

  The powder collection blade 32 has a bent structure in which a plurality of flat plates are connected so as to swell in the opposite direction to the rotation direction of the in-container revolving member 30 (the direction of the arrow in FIG. 4), while the dust distribution blade 33 is in the revolving state in the container. It extends straight from the axial center plate 31 toward the side wall of the large-diameter cylindrical portion 22 in a state inclined with respect to the rotation direction of the member 30. Although not shown, the dust collection blade 32 extends to a position where the tip thereof is adjacent to the side wall of the large diameter cylindrical portion 22, and the dust collection blade 33 is shorter than that.

  Then, the powder accumulated on the annular accumulation portion 25A is guided to the center side by the powder collection blade 32 and fed to the small-diameter cylindrical portion 23, and the powder collected by the powder collection blade 32 by the dust blade 33 is removed to the outside. When the powder collection blade 32 passes next, it is taken into the small diameter cylindrical portion 23 and the pressure applied to the powder in the small diameter cylindrical portion 23 is easily stabilized. In addition, the powder collecting blade 32 and the dust blade 33 cooperate to stir the powder, and the powder lump in the annular deposition portion 25A is also pulverized.

  As shown in FIG. 4, an auxiliary guide wall 34 that is obliquely cut and raised from the shaft center plate 31 is formed at the base portion of the powder collection blade 32 of the shaft center plate 31 of the in-container turning member 30. The auxiliary guide wall 34 is inclined so as to gradually go down in the powder guiding direction by the powder collection blades 32. Then, the powder guided to the powder collection blade 32 and reaching the base end portion thereof is forcibly dropped to the small diameter cylindrical portion 23 by the auxiliary guide wall 34.

  The in-container turning member 30 is integrally provided with a plurality of turning legs 35 and 36 extending downward from the shaft center plate 31. As shown in FIG. 3, these swinging leg portions 35 and 36 are both disposed in the small diameter cylindrical portion 23 and can turn there.

  The first swivel legs 35 are provided in pairs on the root portion of the dust wings 33 and the root portion of the dust collection wings 32 of the shaft plate 31. The first swivel leg 35 has a band plate shape, and is slanted toward the rear of the swivel direction of the swivel member 30 in the container as it goes downward (specifically, about 30 degrees with respect to the vertical direction). Inclined and extended.

  The second swivel leg portion 36 hangs down from the base portion of the dust wing 33 of the axial center plate 31, and has a band plate shape having substantially the same width as the first swivel leg portion 35.

  These swivel legs 35 and 36 swirl within the small-diameter cylindrical portion 23, so that powder solidification and aggregation within the small-diameter cylindrical portion 23 are prevented.

  As shown in FIG. 3, a pair of bottom walls 37 and 38 are provided in two upper and lower stages below the lower ends of the first and second swivel legs 35 and 36 in the powder container 21. It has been.

  As shown in FIG. 6, the upper bottom wall 37 has a structure in which a plurality of powder passage holes 37 </ b> A are formed through a thin disk. These powder passage holes 37A are closed by an arch formed by adhering (crosslinking) the powders fed from the large diameter cylindrical portion 22 to the small diameter cylindrical portion 23, and the powder arch collapsed. The size is such that the powder can pass through. Specifically, the arch is destroyed by the vibration of the ultrasonic vibrator 37B attached to the upper bottom wall 37, and the powder falls to the lower bottom wall 38. In the present embodiment, the bottom wall 37 in the upper stage is prepared in a plurality of types in which the size, number and arrangement of the powder passage holes 37A are different (for example, see FIG. 9). It is possible to select and attach appropriately according to the particle size and the like.

  On the other hand, the bottom wall 38 of the lower stage is formed with only one powder passage hole 38A at the center. As shown in FIG. 7, the powder passage hole 38A has a mortar shape with a diameter reduced downward, and as shown in FIG. 8, the pore diameter of the smallest diameter part is several times the average particle diameter of the powder P1. It is about. As a result, the powder can be discharged in a very small amount (for example, 1 to 3 particles). Here, the ultrasonic vibrator 38B is attached to the bottom wall 38 of the lower stage. If the powder passage hole 38A is clogged, the powder is forcibly dropped by the vibration of the ultrasonic vibrator 38B. It is possible to eliminate clogging. As shown in FIG. 10, the bottom wall 38 in the lower stage has more powder passage holes 38 </ b> A that are several times the average particle diameter of the powder than the number of powder passage holes 37 </ b> A in the upper bottom wall 37. The thing provided is also prepared and can be appropriately selected and attached.

  As shown in FIG. 3, the bottom walls 37 and 38 can be inserted / removed through slits 24 </ b> A and 24 </ b> A opened to the side surface of the powder discharge cylinder portion 24, and the peripheral edge portion of the upper bottom wall 37 has a small diameter. It is sandwiched between the lower end portion of the cylindrical portion 23 and the inner peripheral step surface of the powder discharge cylindrical portion 24, and the bottom wall 38 of the lower stage is formed on the inner peripheral surface of the powder discharge cylindrical portion 24. Is engaged with the groove. In addition, the leakage of powder from the gaps between the slits 24A, 24A and the bottom walls 37, 38 is prevented by a pair of O-rings that are in close contact with the bottom walls 37, 38 from the thickness direction. Yes.

  As shown in FIG. 3, a scraper 40 is provided on the upper surface of the lower bottom wall 38. The scraper 40 is detachably fixed to a lower end portion of a rotating shaft 27A (thin shaft portion) that penetrates the upper bottom wall 37. As shown in FIG. 5, the scraper 40 includes a cylindrical portion 41 that fits outside the rotary shaft 27 </ b> A, and a strip plate portion 42 that protrudes in a cantilevered manner from the lower surface of the cylindrical portion 41. The plate portion 42 is curved so as to swell toward the rear in the rotational direction. The scraper 40 turns while being in sliding contact with the upper surface of the bottom wall 38 of the lower stage, scrapes the powder that has passed through the upper screen 37 and dropped onto the bottom wall 38 of the lower stage, and gathers it to the center thereof, thereby passing through the powder passage hole. It is configured to drop from 38 </ b> A downward to the powder supply device 20. The above is the description of the powder supply apparatus 20. It should be noted that “powders” are “aggregates of solid particles”, and “solid particles” include primary particles, secondary particles, and aggregated particles. . Further, the size of the solid particles includes a so-called “nanoparticle” level.

Here, the powder supplying device 20 described above, as shown in FIG. 1, is suspended from platform scale 48 via a suspension member, emissions of the powder from the powder supplying device 20, powder It is measured as the total weight reduction amount of the body supply device 20 and is output to a control device (not shown).

Next, the apparatus main body 400 will be described. Apparatus main body 400, the powder supplied from the powder supplying device 20 by circulating fluidized granulation container 410 for performing granulation, disposed below the granulation container 410, grown on a predetermined particle diameter or more on And a collection container 10 (see FIG. 13) for storing the large-diameter particles discharged from the granulation container 410 .

As shown in FIG. 1, the granulation container 410 has a flat box structure. The upper end of the granulation vessel 410 is closed, and a gas discharge hole 63A is provided on the upper end wall of the granulation container 410 , and the exhaust tube 63 stands up from the opening edge of the gas discharge hole 63A. The bottom 410C of the granulation vessel 410 is curved in an arc shape that bulges downward. From one side surface 410A in the flat direction of the granulation container 410, a guide protruding wall 411 is provided so as to protrude from the upper chamber 420 above the guide protruding wall 411 and the guide protruding wall 411. It is divided into a cylindrical chamber 421 extending in a substantially horizontal direction below. The lower surface 412 of the guide projection wall 411 is an arc surface having the same curvature as the curvature of the bottom portion 410C of the granulation vessel 410, and constitutes the inner surface of the cylindrical chamber 421 smoothly and continuously with the inner surface of the bottom portion 410C. Further, an upper communication port 419 is formed between the tip 411A of the guide protruding wall 411 and the other side surface 410B of the granulation container 410, and the upper chamber 420 and the cylindrical chamber 421 communicate with each other. The upper chamber 420 is provided with a filter 65 for collecting powder. A slit nozzle 414 for generating a circulating gas flow is provided at the bottom 410C of the granulation vessel 410. As shown in FIG. 11, the slit nozzle 414 extends over the entire length of the granulation vessel 410 and is configured to eject gas toward the tangential direction of the inner surface of the bottom portion 410C. The gas supplied from the slit nozzle 414 into the granulation vessel 410 is along the inner surface of the bottom portion 410C of the granulation vessel 410 and the lower surface 412 of the guide projection wall 411 as shown by the two-dot chain arrows in FIGS. It flows like drawing a circle and generates a circulating gas flow. Since the upper surface 413 of the guide projection wall 411 is an inclined surface, no powder is deposited. Further, a nozzle of an ionizer 220 is arranged at a predetermined position inside the cylindrical chamber 421, and ion wind is blown against the powder. The ionizer 220 ionizes gas molecules in the gas by using corona discharge, for example, and generates positive or negative gas ions. The method of generating gas ions may be a method using radiation or thermal ionization in addition to corona discharge, but the principle is well known (see JIS B9929: 2006 “Method for Measuring Ion Density in Air”). The detailed explanation is omitted. The particles and particles are charged by the adhering gaseous ions contained in the ion wind, and the particles and particles charged to opposite polarities are electrically attached (electrostatic adsorption) to gradually form the particles. Diameter increases.

The granulation vessel 410 is inclined so that the bottom portion 410C is lowered from the one end portion 415 in the longitudinal direction toward the other end portion 416. And the collection | recovery hole 417 for collect | recovering a large diameter granule is penetrated and formed in the other end part 416 located in the lowest side among the bottom parts 410C of the granulation container 410. As shown in FIG. The other end portion 416 of the granulation vessel 410 is provided with a collection vessel 10 (see FIG. 13) communicating with the collection hole 417. The collection container 10 has a hopper structure that is tapered toward the lower side, and includes a cylindrical discharge pipe 418 at the lower end thereof. A flexible tube 14 is attached to the discharge pipe 418.

As shown in FIG. 13 , the flexible tube 14 has a cylindrical shape that is elongated in the vertical direction, and on the side near the lower end opening 13 </ b> A of the discharge pipe 418 and on the side near the lower end of the flexible tube 14, First and second open / close chucks 15 and 16 that can be closed by crushing the flexible tube 14 are provided. The first and second open / close chucks 15 and 16 are configured such that when one is closed, the other is opened. In other words, in a state where the lower end opening 13A of the discharge pipe 418 as "takeout granules" was closed by the first opening and closing chuck 15, the lower end opening 14A of the flexible tube 14 is opened (the state of FIG. 16), the flexible tube The lower end opening 13 </ b> A of the discharge pipe 418 is opened (the state shown in FIG. 14 ) in a state where the lower end opening 14 </ b> A is closed by the second opening / closing chuck 16. Thereby, it is possible to take out the large-diameter particles from the collection container 10 while preventing the gas from flowing out from the granulation container 410 (in other words, without making the circulation gas flow unstable). Note that the flexible tube 14 is disposed between the lower end opening 13A of the discharge pipe 418 and the first opening / closing chuck 15 and between the first opening / closing chuck 15 and the second opening / closing chuck 16 inside the flexible tube 14. The shape retaining rings 17 and 17 for retaining the tube in a cylindrical shape are fitted inside. The above is the description regarding the apparatus main body 400 .

Instrumentation Okimoto body 400 (specifically, the lower end opening 14A of the flexible tube 14) Directly below the metering device (not shown) is installed, receives the larger diameter body discharged from the apparatus main body 400, the weight Can be weighed. The measurement result is taken into a control device (not shown), and the control device drives the motor 27 of the powder supply device 20 based on the measurement result, and the powder discharged as a large-diameter granule is granulated in the granulating container 410. To replenish. Thereby, the amount of powder in the granulation container 410 can be kept substantially constant without excess or deficiency.

  The above is description regarding the structure of the granulation apparatus 100 of this embodiment, Comprising: Next, the effect | action and effect of this embodiment are demonstrated.

The powder supplied from the powder supply device 20 into the granulation container 410 falls along the other side surface 410B opposite to the one side surface 410A from which the guide protrusion wall 411 of the granulation container 410 protrudes in the upper chamber 420. Then, it passes through the upper communication port 419 and flows into the cylindrical chamber 421. Then, it rides on the circulating gas flow circulating in the cylindrical chamber 421 and circulates and flows so as to turn. In the middle of the circulation path, ions are supplied from the ionizer 220 and are gradually increased in diameter by electrostatic adsorption with each other. And when it becomes a large-diameter particle | grain more than a predetermined particle size, it will detach | leave from a circulation gas flow, will go to the collection | recovery hole 417 by the inclination of the bottom part 410C of the granulation container 410, and will be discharged | emitted from the collection | recovery hole 417 to the collection container 10. The

The large-diameter particles discharged to the collection container 10 roll into the flexible tube 14 as they are. In the initial state, the first opening / closing chuck 15 provided on the upper end side of the flexible tube 14 is closed, and the large-diameter particles are dammed here (state shown in FIG. 12 ). When a predetermined amount of large-diameter particles are accumulated or when a predetermined time has elapsed, the first opening / closing chuck 15 is opened while the second opening / closing chuck 16 on the lower end side is closed. Then, the large-diameter particles that have been dammed move downward and are dammed again by the second opening / closing chuck 16 (state shown in FIG. 14 ). Further, the first opening / closing chuck 15 is immediately closed, and the large-diameter particles newly transferred into the collection container 10 are dammed (state shown in FIG. 15 ). By opening the second opening / closing chuck 16 in this state, a predetermined amount of large-diameter particles are collectively discharged from the lower end opening 14A of the flexible tube 14 (state shown in FIG. 16 ). These large-diameter particles are received in a tray of a measuring instrument ( not shown) and weighed. Then, powder having the same weight as the measurement result (the amount discharged as a large-diameter granule) is replenished from the powder supply device 20 into the granulation container 410 .

Note that the powder may be supplied only from one end portion 415 in the longitudinal direction of the granulation vessel 410 or may be supplied all at once from a plurality of locations in the longitudinal direction. Specifically, for example, as in the distribution supply device 450 shown in FIG. 12, the front end discharge portion 453 of the flange portion 452 extending substantially horizontally from the lower end portion of the hopper 451 containing powder is expanded in a fan shape. A plurality of distribution grooves 454 are formed on the bottom surface of the tip discharge portion 453, and the powder rolling on the flange 452 by vibration or the like is divided into distribution grooves 454 at the base end portion of the front end discharge portion 453, and each distribution What is necessary is just to make it powder fall from the groove | channel 454, respectively. Thus, when supplying powder from a plurality of locations in the longitudinal direction of the granulation vessel 410, it is preferable to provide a plurality of ionizers 220 in the longitudinal direction of the granulation vessel 410.

As described above, according to the granulating apparatus 100 of the present embodiment, the powder circulates and flows so as to swirl on the circulating gas flow circulating in the cylindrical chamber 421 . In the process, when ions are added, the powders adhere to each other and the particle size gradually increases. And the large-diameter particle | grains grown more than a predetermined particle diameter remove | deviate from a circulation gas flow with dead weight. Here, the large-diameter particles grown to a predetermined particle size or more immediately pass through the recovery hole 417 formed at the lowest position in the bottom of the cylindrical chamber 421, that is, immediately outside the granulation container 410 , that is, the recovery container. Therefore, the circulating powder or particles are prevented from further adhering to the large-diameter particles grown to a predetermined particle size or more. Thereby, it is possible to suppress the excessive increase in size of the large-diameter particles and improve the uniformity of the particle size.

Further, a flexible tube 14 communicated with the recovery container 10 via the lower end opening 13A of the recovery container 10 is provided, and either the lower end opening 14A of the flexible tube 14 or the lower end opening 13A of the recovery container 10 is blocked. Since the other is opened in the state, the outflow of gas from the granulation vessel 410 is prevented, and the large-diameter particles collected in the collection vessel 10 can be prevented without disturbing the circulating gas flow in the granulation vessel 410 . Can be taken out. Thereby, granulation of a powder and taking-out of a large diameter granule can be performed simultaneously.

Furthermore, since the powder discharged as large-diameter particles is replenished to the granulation container 410 from the powder supply device 20, the amount of powder in the granulation container 410 is kept almost constant without excess or deficiency. The large-diameter particles can be continuously and stably produced.

Contact name as in the present embodiment, when performing granulation electrically attached so the powder together by ions, drying treatment required when performing granulation by spraying the chemical solution dispensed Become. Further, the chemical hanging the wall surface of the granulation vessel 410, the powder can be avoided to stick to the wall of the granulation vessel 410.
[Other Embodiments]

  The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) In the above embodiment, although a configuration including only the Lee Onaiza 22 0, may perform the granulation by applying both heat and ions powder.

(2) In the above embodiment, powder to impart ion-was configured to perform granulation, increasing the suction force of the powder by spraying the powder in the circulating fluidized binder agent, flour The bodies may be aggregated and granulated. Further, a coating agent is coated with a coating agent of the surface of the powder by spraying the powder, but it may also be carried out granulation by growing the coating layer.

( 3 ) In the above embodiment, the upper and lower portions of the flexible tube 14 are opened and closed by the first and second open / close chucks 15 and 16, thereby preventing gas outflow from the granulation vessel 410 and increasing the diameter from the collection vessel 10. had been discharged granules, it may be a rotary valve 340 as shown in FIG. 17.

( 4 ) In the above embodiment, the large-diameter particles are collected in a predetermined amount and discharged to the measuring device . However, instead of the flexible tube 14, a cylindrical packing film member is used to place the large-diameter particles. A fixed amount may be divided into small portions and sealed in a cylindrical packing film member.

Specifically, for example, a welding sealer 351 that can crush a lower end opening 13A of the collection container 10 by crushing a resin film tube 350 as a cylindrical packing film member from the outside is provided, and the welding sealer 351 is made of resin. It is possible to move up and down along the film tube 350. When sealing large-diameter particles in small portions, first, the resin film tube 350 is closed from the outside with a welding sealer 351 and closed, and the closed portion is heat-welded and recovered above the closed portion. The large-diameter particles dropped from the container 10 are stored (state shown in FIG. 18A ). Larger diameter body moves the welding sealer 351 upward until accumulated a predetermined amount, to stand still in the open state (FIG. 18 (B)). Then, when a predetermined amount of large-diameter particles have accumulated in the closed portion, the welding sealer 351 is closed. Then, a sealed bag is formed in the middle of the resin film tube 350, and a predetermined amount of large-diameter particles are sealed in the bag. By repeating such an operation, a plurality of bags connected to the resin film tube 350 are formed, and large-diameter particles can be sealed by a predetermined amount in these bags. In addition, since the lower end opening 13A of the recovery container 10 is always closed, gas outflow from the granulation container 410 is prevented, and powder granulation and large-diameter particle packing are performed simultaneously. be able to. Note that the welding sealer 351 may melt the resin film tube 350 simultaneously with heat welding.

( 5 ) The powder supply device is not limited to the structure of the above embodiment, and may be other known powder supply devices. Further, in the powder supply apparatus 20 of the above-described embodiment, an L-shaped pipe 360 shown in FIG. 19 is connected instead of the powder discharge cylinder portion 24, and an L-shape is provided by a vibrator 361 provided in the middle of the L-shaped pipe 360. By oscillating the pipe 360 (low frequency vibration or ultrasonic vibration), the powder may be discharged little by little. Further, by providing a flange portion 362 having a V-shaped cross section at the tip of the L-shaped pipe 360, the powder may be arranged in a line and discharged in a very small amount (one by one).

( 6 ) Nanoparticles may be synthesized using powder as a raw material and supplied to the granulation vessel 410 . Specifically, it may be synthesized nanoparticles powder dropped from the powder supply device 20 is passed through a flop Razumafure arm.

( 7 ) Alternatively, nanoparticles may be synthesized by a so-called “gas phase synthesis method” and supplied to the granulation vessel 410 as “powder” according to the present invention. Specifically, the source of the raw material gas which is a raw material of nano-particles in place of the powder supply device 20 is provided, the raw material gas by passing the flop Razumafure beam may be synthesized nanoparticles. Additionally, suspensions of the powder are suspended, the solution slurry or powder raw material is dissolved, or a solution organic raw material and the organic compound raw material is dissolved, the fine droplets of Teso to fine droplets plasma dried frame heat or by ionized producing a powder (nanoparticles), which is directly may be supplied to the granulating container 410 circulation.

( 8 ) Although the weight of the powder supply device 20 is weighed by the platform balance 48, depending on the material properties of the powder and the purpose of the granulation / coating product, the powder feeding device 20 is weighed using a calibration curve prepared in advance. May be.

(9) in the technical scope of the invention according to claim 4 of the present application, in the first implementation embodiment, the recovery hole 4 17 Zotsubuyo device 4 10, can be opened and closed by vertically moving a movable shut-off valve Granulating apparatus. In this granulating device, as described in the above embodiment, it can either be performed granulation with opened recovered hole 4 17 performs granulation while closing the recovered hole 4 17 movable shut-off valve You can also. When performing granulation in the state of closing the recovered hole 4 17 movable shut-off valve, pre powder predetermined amount supplied to Zotsubuyo device 4 10, are closed in a state of stopping the supply of powder the powder is circulated flow in Zotsubuyo device 4 10.. After a predetermined time passes, to stop the circulating fluidized finished granulation, by opening the movable shut-off valve to discharge the larger diameter body from the granulator container 4 10. And this is repeatedly performed as needed. Here, it may be provided with a plasma torch which irradiates plasma frames to the powder to the circulating fluidized riding circulating gas stream within Zotsubuyo 410, ions in the powder circulating riding circulating gas stream An ionizer (corresponding to “ion imparting means” in claim 4 of the present application) may be provided.

Here, or powder is passed through a plasma torch and passing the plasma frame, by irradiating plasma frame to the powder in the circulation flow, or irregularities are formed on the surface of the powder, the powder Carbide, nitride, oxide and fluoride are generated on the surface of the material, and the surface of the powder is coated with a carbon film, silicon film, silicon nitride film and resin film (for example, a fluororesin film), or carbon nanowall Can be formed. In addition, an insulating film or a conductive film can be formed on the surface of the powder. Furthermore, it is possible to introduce a hydrophilic functional group or a water repellent (hydrophobic) functional group on the surface of the powder. Here, by changing the plasma frame of the raw material gas sequentially, they may form a plurality of different coating layers on the surface of the powder. The device more may be a plasma torch are sequentially used to form the forming and surface coating layer of the powder with the present body 4 10.

10 Collection container 13A Lower end opening (granule outlet)
14 flexible tube 14A lower apertures 15 first closing chuck 16 second closing chuck 20 powder supplying device 63A gas discharge hole 65 filter 100 granulator 220 ionizer (ion applying unit)
350 resin film made tube 410 granulation vessel
414 slit nozzle (gas ejection part)
417 recovery hole 418 discharge pipe
419 Upper communication port
420 upper room
421 cylindrical room

Claims (4)

Generating a circulating gas stream circulating inside the granulation vessel, the circulating put the powder into the circulating gas stream, heat to the powder in the middle of the path of the circulating gas stream, ions or mist adsorbing In a granulating apparatus for producing a large-diameter granule that is adhered to each other by applying a substance or growing a layer of the adsorbing substance on the surface of the powder to grow to a predetermined particle diameter or more,
A recovery hole formed through the bottom of the granulation vessel, through which the large-diameter particles separated from the circulating gas flow by its own weight can pass;
A recovery container disposed below the granulation container, communicating with the granulation container through the recovery hole and closed in whole except the granule recovery hole;
The recovery container is provided to be openable and closable, and includes a particle outlet for taking out the large-diameter particles accommodated in the recovery container ,
In the granulating container, a cylindrical room extending along a horizontal direction or a direction inclined with respect to the horizontal direction, and
An upper communication port formed in the upper portion of the cylindrical chamber and extending in the axial direction of the cylindrical chamber ;
An upper chamber disposed above the cylindrical chamber and communicating with the interior of the cylindrical chamber via the upper communication port;
A gas discharge hole provided in the upper chamber and communicating with the outside of the granulation container through a filter;
A gas ejection section provided in the cylindrical chamber, for supplying a gas along a tangential direction of an inner curved surface of the cylindrical chamber, and generating a circulating gas flow circulating along the inner curved surface of the cylindrical chamber; A granulating apparatus , wherein a hole is arranged at a lower end of the cylindrical chamber . The granulation according to claim 1, wherein a bottom portion of the cylindrical chamber is inclined so as to descend from one end portion in the longitudinal direction toward the other end portion, and the recovery hole is formed through the other end portion. apparatus. The structure according to claim 1 or 2, further comprising a powder supply device provided in the upper chamber and capable of continuously supplying powder to the inside of the cylindrical chamber through the upper communication port. Grain device. A gas ejection section for generating a circulating gas flow circulating inside the granulation vessel;
An ion imparting means for imparting ions to the powder circulating on the circulating gas flow,
Granulator you characterized by producing larger diameter body grown to a predetermined particle size or less on by attaching the powder bodies granted the ions electrically.