WO2006006291A1 - ジェットミル - Google Patents
ジェットミル Download PDFInfo
- Publication number
- WO2006006291A1 WO2006006291A1 PCT/JP2005/007812 JP2005007812W WO2006006291A1 WO 2006006291 A1 WO2006006291 A1 WO 2006006291A1 JP 2005007812 W JP2005007812 W JP 2005007812W WO 2006006291 A1 WO2006006291 A1 WO 2006006291A1
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- WO
- WIPO (PCT)
- Prior art keywords
- crushing chamber
- jet mill
- nozzle
- gas injection
- crushing
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
- B02C19/061—Jet mills of the cylindrical type
Definitions
- the present invention relates to a jet mill that refines a crushed material introduced into a crushing chamber by a swirling flow generated by gas injection from a plurality of injection nozzles arranged along an inner peripheral wall of the crushing chamber. About.
- a jet mill grinds and refines a pulverized material introduced into a crushing chamber by a swirling flow by a high-speed jet. It is weak against heat, such as agricultural chemicals and toners, and is a powder or ceramic powder. It is effective for use in producing a wide variety of fine powders such as production.
- FIG. 17 and FIG. 18 show a schematic configuration of a conventional jet mill.
- FIG. 17 schematically shows a cross-sectional configuration viewed from the side
- FIG. 18 schematically shows a cross-section of the main part.
- a plurality of gas injection nozzles 20, 21 are mounted on a housing 11 forming a crushing chamber 12.
- Each of the injection nozzles 20 and 21 is fixedly installed so that the injection port faces a predetermined direction in the crushing chamber 12.
- one of the plurality of gas injection nozzles 20, 21 (20) forms a solid-gas mixing ejector nozzle that supplies crushed material into the crushing chamber 12.
- the ejector nozzle (20) injects and introduces the crushed material supplied from the hopper-shaped crushed material supply unit 32 into the crushing chamber 12 together with the high-speed gas flow injected from the drive nozzle 31.
- the gas injection nozzles 20, 21 and the drive nozzle 31 are each supplied with high-pressure gas (air or appropriate gas) from the high-pressure working gas supply device 40 via the air-feeding tube 41. .
- the crushed material introduced into the crushing chamber 12 is pulverized by being caught in a high-speed swirling flow generated by gas injection from a plurality of gas injection nozzles 20 and 21 arranged along the inner peripheral wall of the crushing chamber 12. , Refined.
- the refined powder is taken out from a fine powder outlet 14 located above the center of the crushing chamber 12.
- Patent Document 1 Patent No. 3335312 [0008] (Conventional problems)
- the conventional jet mill 10 ′ described above has a plurality of gas injection nozzles 20 and 21 each having its injection port in order to generate a high-speed swirling flow in the crushing chamber 12 as shown in FIG. Was mounted 'fixed' so as to face in the predetermined direction in the crushing chamber 12.
- the injection nozzles 20 and 21 were fixedly mounted so as to inject gas in the direction optimal for generating the high-speed swirling flow.
- the optimal direction is not necessarily constant, but is very large and diverse depending on the type of crushed material. It turns out to change.
- the pulverization efficiency is not necessarily limited to the gas injection speed, but the injection direction is a very large parameter element. Therefore, if the injection direction can be set appropriately, efficient pulverization can be performed even in a small-scale compressor facility with low power consumption.
- the optimum injection direction differs greatly or slightly depending on conditions such as the type and amount of the pulverized material that is not constant. The ability to respond quickly and appropriately to these fluctuating conditions Force that is a necessary condition for carrying out force-efficient crushing The above-described conventional jet mill does not necessarily have such conditions.
- a first object of the present invention is to provide a jet mill that can perform efficient pulverization by optimizing different pulverization conditions depending on the type of crushed material.
- a fourth object of the present invention is a jet mill capable of performing classification at the same time while performing pulverization, thereby reducing or eliminating the need for classification as a post-processing or its processing burden. Is to provide.
- a fifth object of the present invention is to provide a jet mill capable of obtaining a high crushing capability while reducing the burden on peripheral equipment such as a compressor.
- a sixth object of the present invention is to provide a jet mill capable of optimizing different pulverization conditions depending on the type of pulverizing agent and the like and performing efficient pulverization.
- the present invention discloses the following means.
- the first main means of the present invention is a jet mill that refines the pulverized material introduced into the crushing chamber by gas injection from a plurality of gas injection nozzles disposed along the inner peripheral wall of the crushing chamber.
- the gas injection direction into the crushing chamber can be variably adjusted.
- a second main means of the present invention is that, in the means 1, the gas injection nozzle is fitted and inserted in a through hole formed in the housing of the rupture chamber in a radially movable state.
- the gas injection nozzle is pivotally supported by a movable bearing in the through hole so that its direction can be adjusted.
- a third main means of the present invention is the seal in the means 2, wherein the movable bearing is a spherical bearing, and the gas injection nozzle is pivotally supported so that the direction of the gas injection nozzle can be adjusted, and the through hole is closed. It is characterized in that a part is formed.
- a fourth main means of the present invention is that, in the means 3, a groove is formed in an annular shape along the sliding surface of the spherical bearing, and a pressurized gas is introduced into the annular groove. It is characterized by doing so.
- the fifth main means of the present invention is that in any one of the means 1 to 4, the gas injection nozzle is variably held so as to be adjustable in a portion located outside the crushing chamber housing. A holding means is provided.
- the seventh main means of the present invention is that a pulverized material introduced into a horizontal disk-shaped crushing chamber includes a plurality of spray nozzle forces arranged in a circle along the inner peripheral wall of the crushing chamber.
- a movable bearing that supports a plurality of injection nozzles so that each gas injection direction is movable, and above or below the nozzle row
- An annular movable member that is movably supported so as to be capable of swinging in a direction perpendicular to the axial direction of the nozzle, an electric actuator that swings and drives the annular movable member, and a rear end of each injection nozzle Link arms are connected to the same circumferential position of the annular movable member so as to be angularly displaceable, and the ejection direction of each nozzle is simultaneously displaced by the electric actuator.
- An eighth main means of the present invention is characterized in that, in the means of the means 7, any one of the means 1 to 6 is provided.
- a ninth main means of the present invention is that, in the means 7 or 8, the electric actuator is connected to one of the link arms connected to the annular movable member, and via the connected link arm.
- the annular movable member is driven to swing.
- a tenth main means of the present invention is that, in any one of the means 7 to 9, an electric motor having a rotation reduction mechanism is used as a drive source unit of the electric actuator, and the annular shape is used.
- a control means for stopping the movable member at an arbitrary displacement position is provided.
- An eleventh main means of the present invention is characterized in that, in any one of the means 7 to 9, a vibration drive unit that vibrates the annular movable member at a high speed is used as the electric actuator.
- the twelfth main means of the present invention is that the pulverized material introduced into the horizontal disk-shaped crushing chamber is a plurality of spray nozzle forces arranged in a circle along the inner peripheral wall of the crushing chamber.
- an inclined injection nozzle that injects gas in a slanting direction with respect to a horizontal plane is provided, so that the flow of a vertical component is generated in a horizontal swirling flow. It is characterized by generating a swirling flow in a three-dimensional direction.
- a thirteenth main means of the present invention is characterized in that, in the means of the means 12, the means 1 to: V of L 1 is shifted.
- a fourteenth main means of the present invention includes a horizontal injection nozzle installed in the means 12 or 13 so as to generate a horizontal swirl flow in the crushing chamber, and a vertical component in the swirl flow. And an inclined spray nozzle installed so as to generate the flow of the above.
- a nozzle pair in which a horizontal injection nozzle and an inclined injection nozzle are arranged in a vertical direction is provided on an inner peripheral wall of the crushing chamber. It is characterized by being arranged in a circle along.
- a sixteenth principal means of the present invention is characterized in that, in any of the means 12 to 15, the tip surface of the injection nozzle is formed in a spherical shape.
- the seventeenth main means of the present invention is that the crushed material introduced into the crushing chamber is generated by gas injection from a plurality of gas injection nozzles arranged along the inner peripheral wall of the crushing chamber.
- a jet mill that is miniaturized by a swirling flow has first and second crushing chambers, and each of the crushing chambers is refined by the swirling flow and has a fine powder discharge port at the upper center of the crushing chamber.
- the first crushing chamber has a solid-gas mixing ejector nozzle for supplying crushed material from the outside.
- a fine powder inlet is formed in the lower center of the crushing chamber of the second crushing chamber, and the fine powder discharge port of the first crushing chamber and the fine powder inlet of the second crushing chamber communicate with each other through a ventilation conduit. It is characterized by being connected.
- the eighteenth main means of the present invention is the means of the means 17, wherein the means 1 to 16 are
- the nineteenth main means of the present invention is that, in the above means 17 or 18, a second pulverization chamber is concentrically disposed above the first pulverization chamber, and the first pulverization chamber and the first pulverization chamber The two crushing chambers are connected in the vertical direction by the ventilation conduit.
- a twentieth main means of the present invention in any one of the above means 17 to 19, the fine powder discharge port of the first grinding chamber and the fine powder introduction port of the second grinding chamber.
- a rectifying member for suppressing the back flow of the fine powder is provided.
- the rectifying member is a flat conical member, and is installed so as to selectively close a central portion of the fine powder inlet. It is characterized by that.
- a twenty-second main means of the present invention is characterized in that in the above means 21, the gas injection direction into the crushing chamber is variably adjustable in at least one crushing chamber. Best mode for carrying out
- a jet mill is provided that enables efficient grinding by optimizing different grinding conditions depending on the type of grinding material.
- the first mode will be described based on the illustrated embodiment.
- the gas injection nozzles 20, 21 and the drive nozzle 31 are each supplied with high-pressure gas (air or appropriate gas) from the high-pressure working gas supply device 40 via the air-feeding tube 41. .
- the crushed material introduced into the crushing chamber 12 is pulverized by being caught in a high-speed swirling flow generated by gas injection from a plurality of gas injection nozzles 20 and 21 arranged along the inner peripheral wall of the crushing chamber 12. , Refined.
- the refined powder is taken out from a fine powder outlet 14 located above the center of the crushing chamber 12.
- the movable bearing 51 As the movable bearing 51, a spherical bearing is used. As shown in FIG. 3, the spherical bearing (movable bearing) 51 has an annular movable slider 511 having an outer peripheral surface formed in a spherical shape, and an annular outer periphery of the movable slider 511. And a fixed slider 512 having a spherical shape to be fitted on the inner peripheral surface.
- the movable slider 511 is mounted on the outer periphery of the injection nozzles 20, 21!
- the fixed slider 512 is mounted inside the through hole 13!
- a concave groove 513 is formed in an annular shape along the center of the outer peripheral spherical surface of the movable slider 511.
- An air supply hole 514 for introducing a pressurized gas into the annular groove 513 is formed on the fixed slider 512 side.
- variable holding means 52 is provided for holding the gas injection nozzles 20 and 21 so that the position of the gas injection nozzles 20 and 21 can be adjusted at a portion located outside the housing 11 of the crushing chamber 12.
- FIG. 5 shows a specific configuration example of the variable holding means 52.
- the variable holding means 52 shown in the figure includes a fixed member 531 having a through hole 532 in the center, a rotatable movable member 533 having a U-shaped cutout 534, and a fixing screw (set screw) 535. Has been.
- the gas injection nozzles 20 and 21 are fitted into the cutouts 534 of the movable member 533 in a state of loosely fitting through the through holes 532 of the boss 531.
- the gas injection nozzles 20, 21 can be freely changed in position inside the through hole 532 as shown in (a) to (d) of FIG. It can be fixed at any position by fastening with.
- the gas injection nozzles 20, 21 can be variably adjusted in any direction with the movable bearing 51 as a fulcrum, and can be fixed at an arbitrary adjustment position.
- the jet mill described above is configured so that the gas injection direction into the crushing chamber 12 can be variably adjusted. Good grinding can be performed.
- variable adjustment of the gas injection nozzles 20, 21 may be performed during the pulverization operation.
- the variable adjustment of the gas injection nozzles 20 and 21 may be achieved by arranging a motor for each nozzle force S, common motor force.
- the first embodiment described above is effective even when applied to a cascade processing system in which the pulverized material pulverized by the first jet mill is introduced into the pulverization chamber of the second jet mill and pulverized.
- the first jet mill crushes and refines the crushed material introduced into the crushing chamber 12 from the solid-gas mixing ejector nozzle (20) by the swirling flow in the crushing chamber.
- the fine powder discharge port 14 of the first jet mill is connected to the crushing chamber of the second jet mill, and the crushed material crushed by the first jet mill is introduced into the crushing chamber of the second jet mill. By crushing again, the crushing material can be crushed reliably and efficiently.
- the second form solves the following technical problem in addition to the solution of the first form.
- this type of jet mill is equipped with multiple (usually around 6) nozzles in one crushing chamber.
- the conditions for optimizing crushing efficiency vary depending on the type of crushing material, crushing chamber size, crushing scale, and so on. For this reason, it is necessary to optimize and set the gas injection direction for each of these conditions, but it takes time to variably adjust the injection directions of the plurality of nozzles 20, 21 until the optimum condition is determined. .
- the present inventor has provided an actuator using an electric motor for each of the nozzles 20, 21.
- this electric actuator we studied to change the injection direction of each nozzle 20, 21 at once.
- a large number of electric actuators are required, and there arises a problem that it is difficult to secure a space for installing the large number of electric actuators around the nozzles 20, 21.
- FIG. 6 is a side sectional view showing a schematic configuration of the jet mill according to the second embodiment.
- the jet mill 10 shown in the figure is configured such that the crushed material introduced into the crushing chambers 12A and 12B is injected by gas from a plurality of injection nozzles 20 and 21 disposed along the inner peripheral walls of the crushing chambers 12A and 12B. It is refined by the generated swirling flow and has first and second crushing chambers 12A and 12B.
- Each of the first and second crushing chambers 12A and 12B refines the pulverized material by the gas injection, and has fine powder discharge ports 14A and 14B at the upper center of the crushing chambers 12A and 12B.
- the second crushing chamber 12B is disposed concentrically above the first crushing chamber 12A. Both crushing chambers 12 A and 12 B are connected vertically by a cylindrical pipe-shaped ventilation conduit 15. The housing 11 of the first crushing chamber 12A is installed on the vertical column 16, and the housing 11 of the second crushing chamber 12B is installed on the ventilation conduit 15.
- a rectifying member 172 for suppressing the backflow of the fine powder is disposed between the fine powder discharge port 14A of the first crushing chamber 12A and the fine powder introduction port 18 of the second crushing chamber 12B.
- the rectifying member 172 is a flat conical member, and is installed so as to selectively close the central portion of the fine powder inlet 18.
- the rectifying member 172 is fixed at a predetermined position by a step portion 173.
- An annular air passage is formed between the flow regulating member 172 and the fine powder inlet 18.
- Each of the injection nozzles 20 and 21 is fitted in a through hole 13 formed in the housing 11 of the crushing chamber 12 (12A, 12B) so as to be freely movable in the radial direction.
- each of the injection nozzles 20 and 21 is supported by a movable bearing 51 in the through hole 13. This movable bearing 51 movably supports the injection nozzles 20 and 21 so that they can swing in a direction orthogonal to the axial direction.
- annular movable member 61A that is movably supported so as to be able to swing in the direction orthogonal to the axial direction of the nozzles 20, 21 is disposed.
- the annular movable member 61A has a disk shape having a through hole in the center, and is pivotally supported on the support column 16 via an annular free bearing 63.
- each link arm 64 is formed to have the same length as each other.
- the connection by each link arm 64 is carried out via free connection units 6 5 and 66 which can be displaced in the direction!
- each nozzle 21 and 20 is linked to the common annular movable member 61A via the link arm 64 for each of the noses and nozzles 21 and 20 so that the nozzles 21 and 20 are interlocked with each other. ing.
- the annular movable member 61 A is driven to swing in a circular loop shape in a direction orthogonal to the axial direction of the nozzles 20 and 21 by the electric actuator 62A.
- an electric motor provided with a conversion mechanism such as a rotation speed reduction mechanism and a rotation mode is used as the drive source unit for the electric actuator 62A.
- the force controlled by the control unit 71 is the driving operation of the electric actuator 62.
- the control unit 71 has a position control function for stopping the annular movable member 61 at an arbitrary displacement position. In order to perform this control, the electric actuator 62 has a position detection function.
- the electric actuator 62A is connected to one of the link arms 64, and swings and drives the annular movable member 61A via the connected link arm 64.
- the annular movable member 61A is configured to transmit the motion of the same stroke to each link arm 64.
- the nozzles 20 and 21 are oscillated and driven in the form of a circular loop all at the same displacement stroke by the electric actuator 62A.
- the swing drive by the electric actuator 62 may be a motion mode other than a circular loop, for example, a linear reciprocating motion, if necessary.
- FIG. 7 shows an abstraction of a mechanism portion that variably drives the injection directions of the nozzles 20 and 21.
- the directions of the nozzles 20, 21 are variably driven simultaneously in an interlocking manner by the annular movable member 61A, the electric actuator 62A, and the link arm 64.
- annular movable member 61B that is movably supported so as to be swingable in a direction orthogonal to the axial direction of the nozzle 21
- an electric actuator 62B that swings and drives the annular movable member 61B
- a link arm 64 that connects the rear end side of each injection nozzle 20 to the same circumferential position of the annular movable member 61B so as to be angularly displaceable.
- the jet mill having the above-described configuration can variably adjust the injection directions of the plurality of nozzles 20, 21 for each crushing chamber 12A, 12B at the same time by one electric actuator 62A, 62B. As a result, it is possible to easily and quickly carry out the work of determining the optimum crushing conditions while changing the injection direction of each nozzle 20, 21.
- the trial work until the optimum condition is achieved is shortened, and the process time, the operation cost such as electric power, the waste of crushed material, etc. required for the trial work are significantly shortened and reduced, respectively. Is possible. As a result, even when a small amount of pulverized material is crushed, waste of the crushed material can be reduced and the pulverization can be performed with good efficiency.
- the electric actuators 62A and 62B may be arranged for each of the crushing chambers 12A and 12B that are not connected to the nozzles 20 and 21, the assembly of the equipment is facilitated by avoiding the overcrowding around the nozzles 20 and 21. Maintenance can also be facilitated. Further, if necessary, the nozzles 20 and 21 of the plurality of crushing chambers 12A and 12B can be operated to swing simultaneously. This In addition, it is possible to quickly and easily optimize different grinding conditions depending on the type of grinding material, etc., so that the grinding can be performed with high overall efficiency.
- the crushed material supplied to the first crushing chamber 12A is pulverized by the high-speed swirling flow in the first crushing chamber 12A.
- the powder refined by the primary pulverization is discharged from the central upper force of the swirling flow and guided to the ventilation conduit 15.
- the relatively fine particle size, the powder, or the sufficiently finely divided powder reaches the second crushing chamber 12B with a high probability by buoyancy, while the particle size is relatively coarse. Powder, powder with insufficient fine powder, and large particles return to the first crushing chamber 12A with high probability due to gravity, and are crushed again there.
- particle size distribution (classification) is performed between the first crushing chamber 12A and the second crushing chamber 12B.
- particle size distribution (classification) is performed between the first crushing chamber 12A and the second crushing chamber 12B.
- fine powder outlet 14B of the second crushing chamber 12B only fine powder having a uniform particle size distribution is taken out from the fine powder outlet 14B of the second crushing chamber 12B.
- the classification conditions can be set with a high degree of freedom depending on the flow path diameter and length of the ventilation conduit 15.
- the flow straightening member 172 is a force that is very effective in greatly reducing the probability that coarse particles jump into the second crushing chamber 12B.
- the classification conditions can also be set by the width of an annular air passage formed between the fine powder inlet 18 and the like.
- the second pulverization chamber 12B is disposed concentrically above the first pulverization chamber 12A, and the second A configuration in which the first crushing chamber 12A and the second crushing chamber 12B are connected in the vertical direction by the ventilation conduit 15 is particularly suitable.
- the electric actuators 62A and 62B may be operated steadily within a predetermined swing stroke range in a steady operation state after the injection directions of the nozzles 20 and 21 are optimized. In this case, it is possible to improve the crushing efficiency by changing the direction of the horizontal swirling flow in the crushing chambers 12A and 12B to increase the probability of crushing material collision and Z or contact.
- This second form can be expected to have a synergistic effect when used in combination with the first form.
- the second mode can have various modes.
- the electric actuators 62A and 62B may be connected to the annular movable members 61A and 61B via a dedicated link arm different from the link arm 64 provided for each of the nozzles 20 and 21.
- the electric actuators 62A and 62B may be directly connected to the annular movable members 61A and 61B.
- the first and second crushing chambers 12A and 12B are connected.
- the present invention is configured to use a single crushing chamber or to connect three or more crushing chambers. Is also effective.
- this third form has the following technical problems: To solve.
- the plurality of injection nozzles 20, 21 have their injection directions oriented in the same direction on the same horizontal plane. Installed! It was.
- the crushing material introduced into the crushing chamber 12 is crushed and pulverized by the horizontal swirling flow generated by the nozzles 20, 21 installed as described above. In order to achieve this, it was necessary to sufficiently increase the gas injection speed. In order to increase the gas injection speed, it is necessary to increase the pressure of the working gas. In order to obtain this high-pressure working gas, a large-scale compressor facility that consumes a large amount of power was required.
- the present inventors have found that the crushing of the crushed material is largely caused by the collision of the crushed material carried by the swirl flow. In other words, even if the gas injection speed is increased, the probability that the crushed material will be crushed is low if the crushed material is carried on the high-speed swirling flow generated by the crushed material. In order to efficiently crush the crushing material, it is necessary to increase the probability that the crushing materials that are swiveled at high speed collide with each other.
- jet mill capable of increasing the probability of collision between crushed materials driven by a swirling flow and performing efficient pulverization.
- FIG. 8 is a cross-sectional view of an essential part of a jet mill according to the third embodiment of the present invention.
- the jet mill 10 shown in FIG. 1 has a plurality of spray nozzles 20 arranged in a circle along the inner peripheral wall of the crushing chamber 12 with the crushed material introduced into the horizontal disc-shaped crushing chamber 12. Refined by swirling flow generated by gas injection from ⁇ 22.
- a plurality of gas injection nozzles 20 to 22 are mounted on the housing 11 forming the crushing chamber 12. ing.
- the injection nozzles 20 to 22 are classified into the first and second types according to the installation angle.
- the first nozzles 20, 21 form horizontal injection nozzles 20, 21 installed horizontally so as to generate a horizontal swirl flow in the crushing chamber 12.
- the second nozzle 22 forms an inclined injection nozzle 22 that is installed so as to be inclined so as to generate a vertical component flow in the swirl flow.
- the horizontal injection nozzles 20, 21 and the inclined injection nozzle 22 are arranged to overlap in the vertical direction. That is, the horizontal injection nozzles 20 and 21 and the inclined injection nozzle 22 form a pair, and the nozzle pair is arranged in a circle along the inner peripheral wall of the crushing chamber 12.
- one (20) of them forms a solid-gas mixing ejector nozzle that supplies crushed material into the crushing chamber 12.
- the ejector nozzle (20) injects the crushed material supplied from the hopper-shaped crushed material supply unit 32 into the crushing chamber 12 together with the high-speed gas flow injected from the drive nozzle 31.
- the gas injection nozzles 20 to 22 and the drive nozzle 31 are each supplied with high-pressure gas (air or appropriate gas) from the high-pressure working gas supply device 40 via the air supply tube 41. .
- the crushed material introduced into the crushing chamber 12 is converted into a high-speed swirling flow generated by gas injection from a plurality of gas injection nozzles 20 to 22 arranged along the inner peripheral wall of the crushing chamber 12. Rolled up and crushed and refined. The refined powder is taken out from 14 fine powder outlets located above the center of the crushing chamber 12.
- a conical core portion 171 for guiding a horizontal swirling flow is provided at the lower center of the crushing chamber 12.
- the housing 11 forming the crushing chamber 12 is appropriately divided (not shown)! This housing 11 is stably installed on the vertical column 16 !.
- the horizontal injection nozzles 20, 21 and the inclined injection nozzle 22 force S Force that nozzle pairs arranged in a vertical direction are arranged in a circle along the inner peripheral wall of the crushing chamber 12. This allows a double swirl flow in which two gas flows swirl while spirally intertwining with each other. As a result, it is possible to further increase the probability of collision between the crushed materials.
- Each of the gas injection nozzles 20, 21 is fitted in a through hole 13 formed in the housing 11 of the crushing chamber 12 so as to be freely movable in the radial direction.
- a movable bearing 51 for pivotally supporting the gas injection nozzles 20, 21 in the through hole 13 so that the direction thereof can be adjusted.
- the movable bearing 51 uses the spherical bearing described above.
- annular movable member 61 movably supported so as to be swingable in a direction orthogonal to the axial direction of the nozzles 20 to 22, an electric actuator 62 for swinging and driving the annular movable member 61, and each injection Link arms 64 that connect the rear end sides of the nozzles 20 to 22 to the same circumferential position of the annular movable member 61 so as to be angularly displaceable, and the injection directions of the nozzles 20 to 22 are simultaneously controlled by the electric actuator 62.
- the nozzles 20 to 22 are oscillated and driven by being divided into a group of upper horizontal injection nozzles 20, 21 and a group of lower inclined injection nozzles 22. That is, the upper horizontal injection nozzles 20 and 21 are driven to swing in a circular loop shape by the annular movable member 61, the electric actuator 62, and the link arm 64 disposed on the upper side of the housing 11.
- the lower inclined injection nozzle 22 is oscillated and driven in a circular loop shape by an annular movable member 61, an electric actuator 62, and a link arm 64 disposed on the upper side of the housing 11.
- connection by the link arm 64 is performed via connection portions (free joints) 65, 66 that are freely displaceable in the direction.
- Each nozzle 21, 20 is connected to a common annular movable member 61 via a link arm 64 for each nozzle, so that each nozzle 21, 20 is interlocked with each other.
- the annular movable member 61 has a disk shape with a through hole in the center. Is pivotally supported on the discharge pipe through an annular universal bearing 63.
- an electric motor provided with a modification such as a rotation speed reduction mechanism and a rotation mode is used as a drive source unit.
- the driving operation of the electric actuator 62 is a force controlled by the control unit 71.
- the control unit 71 has a position control function for stopping the annular movable member 61 at an arbitrary displacement position. In order to perform this control, the electric actuator 62 is provided with a position detection function.
- the electric actuator 62 is connected to one of the link arms 64, and swings and drives the annular movable member 61 via the linked link arm 64.
- the annular movable member 61 is configured to transmit the same stroke motion to each link arm 64.
- the nozzles 20 and 21 are oscillated and driven by the electric actuator 62 at the same time with the same displacement stroke.
- the swing drive by the electric actuator 62 may be a motion mode other than the circular loop, for example, a linear reciprocating motion, if necessary.
- the plurality of nozzles 20 to 22 are automatically driven by being divided into a group of upper horizontal injection nozzles 20, 21 and a group of lower inclined injection nozzles 22. It has become so.
- the mode of the high-speed swirling flow is set more variously by individually selecting the swing drive direction of the upper horizontal spray nozzles 20 and 21 and the swing drive direction of the lower inclined spray nozzle 22. be able to.
- nozzle swinging direction is set to be divided into a group of upper horizontal injection nozzles 20 and 21 and a group of lower inclined injection nozzles 22; however, the upper horizontal injection nozzle 20 , 21, or the lower inclined spray nozzle 22, the same effect can be expected.
- the link combination of the link mechanism that performs the swing drive may be changed.
- Fig. 10 shows an abstraction of a mechanism portion that variably drives the injection directions of the plurality of nozzles 22.
- the directions of the nozzles 22 are variably driven simultaneously in an interlocking state by an annular movable member 61, an electric actuator 62, and a link arm 64.
- illustration is omitted here, the directions of the nozzles 21 and 22 are similarly variably driven in an interlocking manner by the annular movable member 61, the electric actuator 62, and the link arm 64.
- the injection direction of the plurality of nozzles 22 (or 20, 21) can be variably adjusted simultaneously by one electric actuator 62, so that each nozzle 22 (or 20, 21) While changing the injection direction, it is possible to easily and quickly carry out the work for determining the injection angle at which the optimum crushing conditions can be obtained.
- one electric actuator 62 may be arranged for a plurality of nozzles 22 (or 20, 21) rather than for individual nozzles 20, 21, thereby avoiding congestion around nozzles 20-22.
- the assembly of the equipment can be facilitated, and maintenance can be easily performed.
- both nozzles 20-22 can be swung simultaneously between horizontal and inclined.
- the third embodiment may have various modes other than those described above.
- the inclined injection nozzle 22 may be disposed above the horizontal injection nozzles 20 and 21.
- the ejector nozzle may be composed of an inclined injection nozzle or both horizontal and inclined injection nozzles.
- the inclined spray nozzles 22 may be arranged above and below the horizontal spray nozzles 20, 21, respectively. That is, the vertical positional relationship between the inclined spray nozzle 22 and the horizontal spray nozzles 20 and 21 may be mixed. Furthermore, the swirling flow in the three-dimensional direction may be generated by two types of inclined injection nozzles inclined upward and downward, respectively.
- the electric actuator may be a vibration drive unit such as an ultrasonic vibrator.
- the jet gas from the nozzle force is pulsated. Therefore, the effect of increasing the collision probability between the crushed materials can be expected.
- the fourth form solves the above technical problems, and has the following main purposes.
- a jet mill that can perform classification simultaneously with pulverization to reduce or eliminate the necessity of classification as a post-treatment or the burden of the treatment.
- the first crushing chamber 12A is equipped with a solid-gas mixing ejector nozzle 20 for supplying the crushed material from the outside, and the second crushing chamber
- the chamber 12B has a fine powder inlet 18 formed in the lower center of the crushing chamber 12B.
- the fine powder inlet 14 of the first crushing chamber 12A and the fine powder inlet 18 of the second crushing chamber 12B Communication connection is established.
- the second crushing chamber 12B is arranged concentrically above the first crushing chamber 12A, and the first crushing chamber 12A and the second crushing chamber 12B are vertically connected by the vent conduit 15. It has been done.
- the housing 11 of the first crushing chamber 12A is installed on the vertical support column 16, and the housing 11 of the second crushing chamber 12B is installed on the ventilation conduit 15.
- the crushed material supplied to the first crushing chamber 12A is pulverized by the high-speed swirling flow in the first crushing chamber 12A.
- the powder refined by the primary pulverization process is also discharged from the central upper force of the swirling flow and led to the ventilation conduit 15.
- powder having a relatively small particle size or sufficiently finely powdered powder reaches the second crushing chamber 12B with a high probability due to buoyancy, while having a relatively coarse particle size.
- body, fine powder Insufficient powder and large particles return with high probability to the first crushing chamber 12A due to gravity, and are crushed again there.
- the distribution (classification) of the particle size is performed between the first crushing chamber 12A and the second crushing chamber 12B.
- the fine powder having a uniform particle size distribution is taken out from the fine powder outlet 14B of the second crushing chamber 12B as shown in FIG. 16 (b).
- the classification conditions can be set with a high degree of freedom according to the flow path diameter and length of the ventilation conduit 15.
- the flow straightening member 172 is a force that is very effective in greatly reducing the probability that coarse particles jump into the second crushing chamber 12B.
- the classification conditions can also be set according to the width of the annular air passage formed in the above.
- the second pulverization chamber 12B is disposed concentrically above the first pulverization chamber 12A, and the second A configuration in which the first crushing chamber 12A and the second crushing chamber 12B are connected in the vertical direction by the ventilation conduit 15 is particularly suitable.
- FIG. 12 shows a preferred embodiment of the tip portions of the nozzles 21 and 22.
- the tip surfaces 211 of the nozzles 21 and 22 are preferably formed in a spherical shape (or a bullet shape) as shown in FIG.
- the tip portions of the nozzles 21 and 22 are preferably formed so that the inner peripheral wall surface force of the crushing chamber 12 is also slightly retracted. This configuration of nozzles 21 and 22 can be effectively applied to the first and second embodiments.
- the movable bearing 51 has a ring-shaped movable slider 511 having an outer peripheral surface formed into a spherical shape, and an annular inner surface having a spherical shape that fits the outer peripheral surface of the movable slider 511. It is configured using a fixed slider 512.
- the movable slider 511 is mounted on the outer periphery of the injection nozzles 20, 21 !.
- the fixed slider 512 is mounted inside the through hole 13!
- reference numeral 515 denotes a sealing O-ring
- reference numeral 516 denotes an annular locking portion that restrains the O-ring 515 in a fixed position.
- Reference numeral 131 denotes an outer tube
- nozzles 21 and 22 are axially supported in a variable direction inside the outer tube 131.
- the force S indicating the movable shaft support structure of the nozzles 21, 22 and the ejector nozzle 20 are also supported on the movable shaft.
- Each of the injection nozzles 20 to 22 is installed such that its injection port faces a predetermined direction in the crushing chamber 12.
- the horizontal injection nozzles 20 and 21 and the inclined injection nozzle 22 are arranged so as to overlap in the vertical direction, and a pair of horizontal and inclined nozzles are arranged in a circle along the inner peripheral wall of the crushing chamber 12.
- FIG. 15 is a cross-sectional view in which the second crushing chamber 12B shown in FIG. 11 is broken in the horizontal direction.
- a rectifying member 172 for suppressing the backflow of fine powder between the fine powder outlet 14A of the first crushing chamber 12A and the fine powder inlet 18 of the second crushing chamber 12B. It is installed.
- the rectifying member 172 is a flat conical member, and is installed so as to selectively close the central portion of the fine powder inlet 18.
- the rectifying member 172 is fixed at a predetermined position by a step portion 173.
- An annular air passage is formed between the flow regulating member 172 and the fine powder inlet 18.
- the fourth embodiment may have various modes other than those described above.
- inclined injection The nozzle 22 may be disposed above the horizontal spray nozzles 20 and 21.
- the ejector nozzle may be composed of an inclined injection nozzle or both horizontal and inclined injection nozzles.
- the inclined spray nozzles 22 may be arranged above and below the horizontal spray nozzles 20, 21, respectively. Furthermore, the swirling flow in the three-dimensional direction may be generated by two types of inclined injection nozzles inclined upward and downward, respectively.
- the electric actuator may be a vibration drive unit such as an ultrasonic vibrator.
- the effect of increasing the collision probability between the crushed materials can be expected by pulsating the jet gas of the nozzle force.
- vent pipe 15 is a straight pipe, for example, depending on the pulverization conditions, the spiral vent pipe 15 may be effective.
- the positional relationship between the first crushing chamber 12A and the second crushing chamber 12B may be, for example, an oblique direction or a horizontal direction other than the vertical direction.
- the present invention is also effective in a configuration in which three or more crushing chambers are connected.
- the pulverized material introduced into the horizontal disk-shaped crushing chamber is gas-injected by a plurality of injection nozzle forces arranged in a circle along the inner peripheral wall of the crushing chamber.
- the jet mill that is refined by the swirling flow generated by the above, it is possible to increase the collision probability between the crushed materials driven by the swirling flow and to perform efficient crushing.
- a jet mill capable of performing classification at the same time while performing pulverization to reduce or eliminate the need for classification as a post-treatment or the burden of the treatment can be provided.
- a jet mill capable of obtaining a high crushing capacity while reducing the burden on peripheral equipment such as a compressor can be provided.
- FIG. 1 is a side sectional view schematically showing a main part of a jet mill according to a first embodiment of the present invention.
- Fig. 3 is a cross-sectional view of the main part showing the mounting state of the gas injection nozzle according to the first embodiment.
- FIG. 4 is a cross-sectional view of the principal part showing the movable bearing portion of the gas injection nozzle according to the first embodiment.
- FIG. 6 is a partially omitted side sectional view showing an embodiment of an essential part of a jet mill according to a second embodiment of the present invention.
- Fig. 7 is a diagram abstractly showing a mechanism portion that variably drives a nozzle injection direction according to the second embodiment.
- FIG. 8 is an omitted side showing an embodiment of the main part of a jet mill according to a third embodiment of the present invention. It is sectional drawing.
- FIG. 9 is an abbreviated side cross-sectional view showing another embodiment relating to the principal part of the jet mill according to the third embodiment.
- FIG. 10 is an abstract view of a mechanism portion that variably drives the injection direction of the nozzle according to the third embodiment.
- FIG. 11 is an abbreviated side sectional view showing an embodiment of the main part of a jet mill according to a fourth embodiment of the present invention.
- FIG. 14 is a transverse cross-sectional view showing the crushing chamber in a horizontal direction above the inclined spray nozzle according to the fourth embodiment.
- FIG. 15 is a cross-sectional view showing the second crushing chamber 12B in the horizontal direction according to the fourth embodiment.
- FIG. 16 is a graph showing examples of a particle size distribution (a) obtained by a conventional jet mill and a particle size distribution (b) obtained by the jet mill of the present invention.
- FIG. 17 is a side sectional view schematically showing a main part of a conventional jet mill.
- FIG. 18 is a cross-sectional view schematically showing the main part of a conventional jet mill.
- Gas injection nozzle (ejector nozzle) Gas injection nozzle (horizontal injection nozzle) Vertical injection nozzle
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05734590A EP1775024A1 (en) | 2004-07-09 | 2005-04-25 | Jet mill |
US11/631,866 US7850105B2 (en) | 2004-07-09 | 2005-04-25 | Jet mill |
JP2006528378A JP4922760B2 (ja) | 2004-07-09 | 2005-04-25 | ジェットミル |
US12/926,214 US8061636B2 (en) | 2004-07-09 | 2010-11-02 | Jet mill |
US13/317,414 US8398007B2 (en) | 2004-07-09 | 2011-10-18 | Jet mill |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-203929 | 2004-07-09 | ||
JP2004203929 | 2004-07-09 | ||
JP2004268504 | 2004-09-15 | ||
JP2004-268504 | 2004-09-15 | ||
JP2004-353267 | 2004-12-06 | ||
JP2004353275 | 2004-12-06 | ||
JP2004-353275 | 2004-12-06 | ||
JP2004353267 | 2004-12-06 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/631,866 A-371-Of-International US7850105B2 (en) | 2004-07-09 | 2005-04-25 | Jet mill |
US12/926,214 Division US8061636B2 (en) | 2004-07-09 | 2010-11-02 | Jet mill |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006006291A1 true WO2006006291A1 (ja) | 2006-01-19 |
Family
ID=35783650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/007812 WO2006006291A1 (ja) | 2004-07-09 | 2005-04-25 | ジェットミル |
Country Status (4)
Country | Link |
---|---|
US (3) | US7850105B2 (ja) |
EP (1) | EP1775024A1 (ja) |
JP (1) | JP4922760B2 (ja) |
WO (1) | WO2006006291A1 (ja) |
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JP2008246298A (ja) * | 2007-03-29 | 2008-10-16 | Sudo Kikai Kogyo Kk | 超微小粒粉砕装置 |
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---|---|---|---|---|
JP2007237079A (ja) * | 2006-03-08 | 2007-09-20 | Nisshin Seifun Group Inc | 粉粒体分配装置およびジェットミル |
JP2007275849A (ja) * | 2006-04-11 | 2007-10-25 | Sunrex Kogyo Kk | ジェットミルおよびジェット粉砕方法 |
JP2008229465A (ja) * | 2007-03-20 | 2008-10-02 | Sudo Kikai Kogyo Kk | 超微小粒粉砕装置 |
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CN117963968A (zh) * | 2024-04-01 | 2024-05-03 | 山东宇信纳米科技有限公司 | 一种超细活性轻质碳酸钙的生产方法 |
Also Published As
Publication number | Publication date |
---|---|
US20110049278A1 (en) | 2011-03-03 |
US8061636B2 (en) | 2011-11-22 |
US7850105B2 (en) | 2010-12-14 |
JP4922760B2 (ja) | 2012-04-25 |
US20080048058A1 (en) | 2008-02-28 |
US8398007B2 (en) | 2013-03-19 |
EP1775024A1 (en) | 2007-04-18 |
US20120037736A1 (en) | 2012-02-16 |
JPWO2006006291A1 (ja) | 2008-04-24 |
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