JP2013198847A - Inertia separator apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inertia separator apparatus that can be composed by low cost and by a simple structure, that can efficiently separate for a fine powder, and further that can set sorting setting that is demanded according to a particle diameter and a specific gravity of a sorting object by a high degree of freedom by one apparatus.SOLUTION: An inertia separator apparatus includes: a powder introduction part including a powder feeding part in which a powder raw material is fed, and a powder sending out part that can send out the powder raw material in one direction such that a motion vector of a horizontal direction component is imparted; a container in which inside airtightness is retained, and that has a space in a sending out direction of the powder raw material in the inside; a powder recovery part that is disposed at a spatial position in which a height position is lower than a maximum achievement point of each powder in the powder raw material sent out to the container from the powder sending out part; and a pressure adjustment mechanism that regulates an atmospheric pressure in the container, wherein a powder sent out from the powder sending out part by a substantially same initial rate in the powder of the powder raw material is made to fall on the powder recovery part adjusting an atmospheric pressure in the container.

Description

  The present invention relates to a dry inertia separator device and a powder raw material sorting and collecting method for separating and collecting a plurality of powders moving by inertial force for each particle diameter or specific gravity based on the action of gravity and the action of air resistance. .

A typical example of the particle classifier is a wet or dry cyclone classifier that applies an inertial force generated by a cyclone mechanism. In recent years, a specific apparatus configuration has been studied (for example, Patent Document 1 and Patent Document 1). 2).
In addition, wet or dry classifiers using centrifugal force are also used for classifying particles (see, for example, Patent Documents 3 and 4).
Furthermore, a jig mechanism (for example, refer to Patent Document 5) that sorts a material having a relatively light specific gravity and a relatively heavy material is proposed in the wet type, and a classification apparatus (for example, Patent Document 6) that applies the Coanda effect in the dry type. (See, for example, Patent Document 7).

  As described above, there are various particle classifiers, but when the particles to be classified are not suitable for being dispersed in water, a dry classifier is used, and a dry classifier is used. Many of them have a mechanism for classifying the particles by causing them to move at a constant speed by an air flow and applying a second force such as gravity or centrifugal force to the particles. In this type of dry classifier, the raw material is supplied into the container by an air flow, and the relatively small particles on the side of the particles contained in the raw material are discharged by the air flow and recovered by a solid-gas separation mechanism such as a bag filter. I am doing so.

However, the collection of fine particles by such a solid-gas separation mechanism has a problem that clogging or collection leakage tends to occur as the particles become finer. Further, when the particles are further reduced, there is a problem in that sorting and collection itself are difficult due to restrictions on the opening diameter of the filter. Furthermore, there is a problem in that the design of the apparatus for performing solid-gas separation in multiple stages for each particle size is restricted by the specifications of the solid-gas separation apparatus.
Therefore, development of a classification device that can classify particles at a low cost with a simpler structure is required.

As a classifying device that classifies particles with a relatively simple structure, powder particles placed on a traveling rubber belt are discharged in the traveling direction of the rubber belt by inertial force, and classification is performed using the difference in the flight distance. An inertia classification method has been proposed (see Patent Document 8).
However, in this inertia classification method, fine powder on the side with a small particle diameter is difficult to cause a difference in flight distance, and is thus removed using an air flow.
That is, when fine powder whose flight direction is affected by disturbance such as irregular air (gas) flow is classified by the difference in flight distance, under the conditions described in Patent Document 8 that does not limit the influence of the disturbance, the fine powder There is a problem that it is difficult to handle assuming that the flight distance is constant. In addition, there is a problem that fine powders having a particle size smaller than the micron order in which the flight direction is affected by Brownian motion (irregular motion) due to kinetic energy of gas molecules cannot be handled.
Therefore, although fine powder is removed using an air flow, there is a problem that classification cannot be performed between fine powders moving according to the air flow.
Therefore, it can be configured with a simple structure at low cost, fine powder can be efficiently separated, and the selection setting required according to the particle size and specific gravity of the selection target can be made with a single device with a high degree of freedom. There is currently no satisfactory inertial separator device that can be set.

JP 2011-125801 A JP 2005-205267 A JP 2011-125786 A JP 2011-45819 A JP 2010-227819 A JP-A-8-206605 JP-A-5-57167 Japanese Patent Laid-Open No. 11-10091

  An object of the present invention is to solve the above-described problems and achieve the following objects. That is, the present invention can be configured with a simple structure at a low cost, can finely separate fine powders, and further has one sorting setting required according to the particle size and specific gravity of the sorting target. It is an object of the present invention to provide an inertia separator device and a powder raw material sorting and recovering method of powder raw material that can be set with a high degree of freedom.

Means for solving the problems are as follows. That is,
<1> A powder input unit into which a powder raw material to be selected is input, and a powder supply capable of transmitting the input powder raw material in one direction so that a motion vector of a horizontal component is given. A powder introduction part having a portion, an internal airtightness is maintained, a container having a space in a sending direction of the powder raw material sent from the powder sending part therein, and the powder sending part The powder is placed in a space position in the container whose height position is lower than the highest point of each powder in the powder raw material sent into the container, and the powder sent into the container has its particles A pressure recovery unit having a plurality of recovery areas defined according to the position of falling depending on the diameter or specific gravity, and a pressure control pump connected to the container and adjusting the pressure in the container An adjustment mechanism, and among the powders in the powder raw material, An inertial separator device configured to drop the powder delivered from the powder delivery unit at a substantially equal initial speed onto the powder recovery unit by adjusting the air pressure in the container. .
<2> The inertial separator device according to <1>, wherein the powder introduction unit includes a powder delivery unit that delivers the powder raw material in a substantially horizontal direction.
<3> The inertial separator device according to any one of <1> to <2>, wherein the powder recovery unit includes a mechanism that makes the number and size of the recovery regions variable.
<4> The powder delivery unit according to any one of <1> to <3>, wherein the powder delivery unit is a tubular member having one end connected to the powder input unit and the other end connected to the container via an on-off valve. Inertial separator device.
<5> The pressure inside the container is maintained at a pressure lower than the pressure outside the container, and the powder raw material is sucked into the container by the pressure difference between the inside and outside of the container and sent out from the container <1 > To <4>.
<6> Furthermore, a powder introduction part is included, and an introduction chamber in which internal airtightness is maintained and connected to the introduction chamber, the pressure inside the introduction chamber is adjusted to a pressure higher than the pressure inside the container. The inertial separator device according to any one of <1> to <4>, further including an atmospheric pressure adjusting mechanism including an atmospheric pressure adjusting pump.
<7> The inertial separator device according to any one of <1> to <3>, wherein the powder delivery unit includes a power unit that transmits the mechanical power to the powder raw material.
<8> The inertial separator device according to <7>, wherein the power unit includes an extruder that extrudes a powder raw material in a horizontal direction.
<9> The material according to any one of <1> to <8>, wherein the radius is 1 mm or less, and after the powder is delivered from the powder delivery unit, the powder raw material falling on a trajectory that draws a constant downward curve is selected and collected. Inertial separator device.
<10> A powder feeding unit into which a powder raw material to be selected is fed, and a powder feeding capable of feeding the inputted powder raw material in one direction so that a motion vector of a horizontal component is given. A powder introduction part having a portion, an internal airtightness is maintained, a container having a space in a sending direction of the powder raw material sent from the powder sending part therein, and the powder sending part The powder is placed in a space position in the container whose height position is lower than the highest point of each powder in the powder raw material sent into the container, and the powder sent into the container has its particles A pressure recovery unit having a plurality of recovery areas defined according to the position of falling depending on the diameter or specific gravity, and a pressure control pump connected to the container and adjusting the pressure in the container And using an inertia separator device having an adjustment mechanism, the powder A powder raw material sorting and collecting method for sorting and collecting raw materials, and among the powders in the powder raw material, the powder delivered from the powder delivery unit at an approximately equal initial speed, A powder raw material sorting and collecting method, wherein the air pressure in the container is adjusted and dropped onto the powder collecting unit.
<11> The pressure described in <10>, wherein the pressure inside the container is reduced to a pressure lower than the pressure outside the container, and the powder raw material is sucked into the container from the powder sending section due to a difference in pressure inside and outside the container. Powder raw material sorting and recovery method.

  According to the present invention, the above-mentioned problems in the prior art can be solved, the structure can be simple and inexpensive, the fine powder can be separated efficiently, and the particle size to be separated Thus, it is possible to provide an inertia separator device and a powder raw material sorting and collecting method capable of setting classification settings required in accordance with specific gravity and classification accuracy with a single apparatus with a high degree of freedom.

FIG. 1 is an explanatory diagram showing an overview of an inertial separator device according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram showing an overview of an inertial separator device according to a second embodiment of the present invention. FIG. 3 is an explanatory diagram showing an overview of an inertial separator device according to a third embodiment of the present invention. FIG. 4 is a partial cross-sectional view showing an example of the structure of a powder delivery section having a power section that transmits mechanical power to a powder raw material. FIG. 5 is an explanatory view showing an outline of an inertial separator device according to a fourth embodiment of the present invention. FIG. 6 is a graph obtained by calculating a trajectory when a particle having a particle diameter of 1 μm, a particle having a particle diameter of 2 μm, and a particle having a particle diameter of 5 μm is horizontally projected. FIG. 7 is a graph showing the results of the sample recovery test. FIG. 8A is an SEM image of the original sample. FIG. 8B is an SEM image of the sample at the collection position 1. FIG. 8C is an SEM image of the sample at the collection position 4.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an explanatory diagram showing an overview of an inertial separator device 1 according to a first embodiment of the present invention.
The inertia separator device 1 has a powder feeding unit 3 for feeding a powder raw material 2 and a powder feeding unit capable of feeding the charged powder raw material 2 in one direction so that a motion vector of a horizontal component is given. The powder introduction section 5 having the section 4 and a part of the powder delivery section 4 can communicate with each other, the internal airtightness is maintained, and the powder delivered from the powder delivery section 4 therein In the container 6 having a space in the delivery direction of the raw material 2 and in the container 6 whose height position is lower than the highest arrival point of each powder in the powder raw material delivered from the powder delivery unit 4 into the container It is arranged according to the position where the powder in the powder raw material 2 which is arranged at the space position (bottom part) and is sent into the container 6 from the powder delivery part 4 changes for each particle diameter or specific gravity and falls. Is connected to the powder recovery unit 7 having a plurality of recovery regions 7a to 7h and the container 6, and adjusts the atmospheric pressure in the container 6. Having a pressure adjusting pump 8 that.

  The powder input unit 3 is formed in a funnel shape, and the powder raw material 2 is input from an expanded input port. The narrowed lower portion of the powder input unit 3 is connected to the powder delivery unit 4, and the charged powder raw material 2 is collected and flows into the powder delivery unit 4.

The powder delivery unit 4 is made of a tubular member, and has one end connected to the lower part of the powder input unit 3 and the other end connected to the container 6 via an on-off valve (not shown). The powder delivery unit 4 is disposed with the axial direction of the tube positioned in the horizontal direction, and the powder raw material 2 held in the tube is directed substantially horizontally toward the container 6 based on the operation of the on-off valve. Can be sent to.
However, the powder delivery unit 4 is not limited to the example shown in the figure, and can be delivered in one direction so that the input powder raw material 2 is directed into the container 6 and a motion vector of a horizontal component is given. It suffices that the axial center direction of the pipe is not necessarily positioned in the horizontal direction.
The powder delivery unit 4 variably adjusts the tube diameter and the tube length from the viewpoint of adjusting the delivery speed of the powder raw material 2 and adjusting the size according to the particle size of the powder in the powder raw material 2. It may have an adjusting mechanism.

  A part of the container 6 can communicate with the powder delivery unit 4 of the powder introduction unit 5 via the on-off valve of the powder delivery unit 4. The container 6 as a whole has only to have a structure in which the inside has a space in the delivery direction of the powder raw material 2. For example, when the communication point with the powder delivery unit 4 is taken as a vertex as shown in the figure, the vertex An umbrella-shaped umbrella section that expands toward the feed direction of the powder raw material 2, and a box-shaped section having a U-shaped cross section that has a sufficient depth toward the feed direction of the powder raw material 2. The umbrella-shaped body portion is connected as a lid of the box-shaped body portion.

The powder recovery unit 7 disposed at a spatial position in the container 6 is formed as a bowl-shaped member partitioned in multiple stages by a partition, and recovery regions 7a to 7h defined by a certain distance in the horizontal direction by the partition. Have
The position of the partition is variable, and the number and size of the collection areas can be variable.
However, the powder recovery unit 7 is not limited to the illustrated example, and a plurality of recoveries defined according to positions where the powder in the powder raw material 2 changes depending on the particle diameter or specific gravity and falls. For example, in the powder recovery unit 7, the partition height is formed so as to increase or decrease stepwise from the side closer to the powder delivery unit 4 to the side farther from the side. May be.

  As the atmospheric pressure adjusting pump 8 connected to the container 6, a known atmospheric pressure adjusting pump such as a vacuum pump can be applied and has a function of adjusting the atmospheric pressure in the container 6. Note that the atmospheric pressure adjusting pump 8 does not need to be directly connected to the container 6, and is connected to the container 6 indirectly through a buffer chamber or the like, and is adjusted to adjust the atmospheric pressure in the container 6. It may be configured as a mechanism.

  In addition, a barometer 9 is provided in the container 6, and the atmospheric pressure in the container 6 can be confirmed from the outside of the container 6. Further, the container 6 is provided with an air pressure adjusting mechanism 10 that ventilates the inside of the container 6 to adjust the air pressure, and the air pressure in the container 6 can be adjusted by operating the air pressure adjusting mechanism 10. . However, the atmospheric pressure adjusting mechanism 10 can control the atmospheric pressure in the container 6, that is, the air flow in the container 6, while generating an irregular air current in the container 6. Designed so as not to adversely affect the sorting of For example, when adjusting the atmospheric pressure by moving the gas in the container 6, it is necessary to consider that no physical obstacle is provided in the direction of gas movement or that an unintended atmospheric pressure gradient is not generated.

  When the powder raw material 2 is sucked into the container 6 from the powder delivery unit 4 due to a pressure difference between the inside and outside of the container 6, the ventilation resistance of the powder delivery unit 4 determines the amount of gas sucked into the container 6. Further, the tube diameter and the tube length of the powder delivery unit 4 and the container according to the pressure difference so that a significant air flow does not occur in the container 6 due to the diffusion effect due to the atmospheric pressure gradient in the container 6. It is necessary to determine the shape and volume of 6.

A method for sorting and collecting the powder raw material 2 using the inertia separator 1 having such a configuration will be described below.
First, the inside of the container 6 is depressurized from the atmospheric pressure by the atmospheric pressure adjusting pump 8. When the on-off valve of the powder delivery unit 4 is opened in a reduced pressure state, the powder raw material 2 put into the powder feed unit 3 is sucked into the container 6 and sent out.

Each powder in the powder raw material 2 delivered from the powder delivery unit 4 into the container 6 falls on the powder recovery unit 7 by the action of gravity.
At this time, under the condition that the powder raw material 2 is delivered from the powder delivery unit 4 at the same initial speed, the dropping position is controlled by the particle diameter or specific gravity of each powder. That is, powder having a larger particle diameter and powder having a higher specific gravity fall to a position farther from the powder delivery unit 4 (see locus 11 in FIG. 1), while powder having a smaller particle diameter and powder having a lower specific gravity. The body falls to a position closer to the powder delivery unit 4 (see the locus 12 in FIG. 1).
That is, from the following equation of motion (A) for the horizontal component and equation of motion (B) for the vertical component, the powder in the powder raw material 2 released at the same initial velocity is: (1) constant particle diameter (radius) When the specific gravity (particle density) increases, the acceleration dv _x / dt (deceleration amount) of the horizontal component having no acting force other than the drag is relatively small as compared with the vertical component on which gravity acts. The fall position becomes far away. (2) Even when the specific gravity (particle density) is constant and the particle diameter (radius) is large, only the drag term is proportional to the square of the size (radius) and compared to other acting forces. Thus, the amount of change is small, and similarly, the horizontal acceleration dv _x / dt (deceleration amount) becomes relatively small, and as a result, the drop position becomes far.

However, each symbol in the said formula (A) and (B) shows the following concepts, respectively.
ρ _p : Particle density of powder r: Particle radius of powder v _x : Horizontal velocity of powder particle v _y : Vertical velocity of powder particle in downward direction t: Time (dv _x / dt): Powder particle Horizontal acceleration (minus)
(Dv _y / dt): vertical acceleration of powder particles (minus)
C _D : Resistance coefficient ρ _f : Gas density v: Particle velocity θ: Elevation angle of particle motion g: Gravitational acceleration

  Therefore, for example, powders having the same specific gravity fall on the powder recovery unit 7 at different drop positions for each particle diameter, and powders having a uniform particle diameter are collected at a different drop position for each specific gravity. It will fall on the part 7.

However, if the particle diameter or specific gravity of each powder in the powder raw material 2 varies, for example, if a powder having a small particle diameter and a large powder are present in the powder raw material 2, the larger the powder, the larger the powder. Since it is delivered with a momentum, it may fall beyond the position where the powder recovery unit 7 is disposed, and this large particle diameter powder may not be recovered.
In addition, for example, the smaller the powder, the smaller the momentum is delivered, so that the powder recovery unit 7 falls before the position where the powder recovery unit 7 is disposed, and the powder with this small particle diameter cannot be recovered. There is.
Therefore, it is necessary to adjust the atmospheric pressure in the container 6 in order to select and collect the powder having the same particle diameter or specific gravity from the powder raw material 2 having a different particle diameter or specific gravity.

Now, assuming that a part of the powder raw material 2 contains a powder having a large particle diameter that falls beyond the position where the powder recovery unit 7 is disposed, if the atmospheric pressure in the container 6 is set higher, A large air resistance is given to the motion of the delivered powder raw material 2 and it can be dropped at a position close to the powder delivery unit 4. Can be dropped on top.
On the other hand, assuming that a part of the powder raw material 2 includes a powder having a small particle diameter that falls before the position where the powder recovery unit 7 is disposed, the pressure in the container 6 can be set lower. The air resistance acting on the motion of the delivered powder raw material 2 is reduced, and it can be dropped at a position far from the powder delivery unit 4, and the powder raw material 2 containing the powder of this small particle diameter is recovered as a powder. It can be dropped onto the part 7.

Thus, in the inertia separator device and the powder raw material sorting and collecting method according to the present invention, by adjusting the atmospheric pressure in the container 6, the powder raw material 2 delivered at substantially the same initial speed is placed at the drop position. It is dropped on the powder recovery unit 7 while adjusting, and in the recovery regions 7a to 7h of the powder recovery unit 7, the powder group in the powder raw material 2 is sorted and recovered for each particle diameter or specific gravity. One of the features.
Then, according to the inertia separator device and the powder raw material sorting and collecting method according to the present invention, various particle sizes and specific gravity can be obtained only by adjusting the pressure in the container 6 and without using a solid-gas separation mechanism such as a bag filter. The powder raw material 2 consisting of the above can be sorted and recovered for each particle diameter or specific gravity.
In addition, when utilizing the internal / external air pressure difference in the container 6 as in the present embodiment, when the powder raw material 2 is delivered from the powder delivery unit 4, a dispersion effect of the powder accompanying gas diffusion occurs, The sortability between each powder can be improved.

In the present embodiment, when the size and specific gravity of each powder in the powder raw material 2 are within a predetermined range, the movement of the powder raw material 2 is governed by the suction force due to the pressure difference inside and outside the container 6, Each of the powders is delivered at a substantially equal initial speed. At this time, when the powders are not delivered at substantially the same initial speed, for example, the powder having a large particle diameter and a high specific gravity is not controlled by the suction force due to the pressure difference between the inside and outside of the container 6, and the powder is sucked. If the powder is controlled by force and the particle size is low and the specific gravity is not delivered at the same initial speed, the pressure inside the container 6 can be reduced by lowering the pressure inside the container 6 (increasing the degree of vacuum). It can be adjusted so that these powders are sent out at substantially the same initial speed.
Therefore, in the inertial separator device 1 according to the present embodiment, it is possible to adjust the initial speed of the powder raw material 2 to be sent out only by adjusting the atmospheric pressure (vacuum degree) in the container 6. The falling position on the powder recovery unit 7 can be adjusted.

In particular, in the inertial separator device 1 according to the present embodiment, as long as the fine powder having a radius of 1 mm or less is used as long as the powder raw material 2 delivered from the powder delivery unit 4 falls along a trajectory that draws a constant downward curve. Therefore, it can be a target for sorting and collecting, and provides extremely high convenience for sorting and collecting fine powder.
In addition, the locus | trajectory which draws a fixed downward curve here draws a regular downward curve by the effect | action of gravity and the effect | action of air resistance, without the powder raw material 2 after sending floating in the air in the container 6. FIG. It means a trajectory of falling.

(Second Embodiment)
Subsequently, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is an explanatory diagram showing an overview of an inertial separator device 30 according to the second embodiment of the present invention.
The inertia separator 30 further includes an introduction chamber 31 that includes a powder introduction portion 5 and maintains the airtightness of the interior, in addition to the apparatus configuration of the inertia separator 1 according to the first embodiment, and the introduction chamber. And an atmospheric pressure adjusting pump 32 that adjusts the atmospheric pressure in the introduction chamber 31 to an atmospheric pressure higher than the atmospheric pressure in the container 6.
In addition, a barometer 33 is provided in the introduction chamber 31, and the atmospheric pressure in the introduction chamber 31 can be confirmed from the outside of the introduction chamber 31. Further, the introduction chamber 31 is provided with an atmospheric pressure adjustment mechanism 34 that ventilates the inside of the container 31 to adjust the atmospheric pressure, and the atmospheric pressure in the introduction chamber 31 can be adjusted by operating the atmospheric pressure adjustment mechanism. it can. However, the atmospheric pressure adjusting mechanism 34 can control the atmospheric pressure in the introduction chamber 31, that is, the air flow in the introduction chamber 31, while generating irregular air current in the introduction chamber 31. It is designed so as not to adversely affect the selection of the body material 2. For example, when adjusting the atmospheric pressure by moving the gas in the introduction chamber 31, it is necessary to consider that no physical obstacle is provided in the gas moving direction.

The introduction chamber 31 is formed as a box having an inverted U-shaped cross section, and the U-shaped box and the ends of the container 6 are connected to each other so as to enclose the powder introduction part 5. It arrange | positions so that one housing may be made.
However, the introduction chamber 31 is not limited to the illustrated example, as long as it contains the powder introduction part 5 in an airtight state. For example, the introduction chamber 31 and the container 6 may be arranged separately.
As the atmospheric pressure adjusting pump 32, a known atmospheric pressure adjusting pump can be used. The atmospheric pressure adjustment pump 32 does not need to be directly connected to the introduction chamber 31. The atmospheric pressure adjustment pump 32 is indirectly connected to the introduction chamber 31 through a buffer chamber or the like to adjust the atmospheric pressure in the introduction chamber 31. It may be configured as an atmospheric pressure adjusting mechanism.

In the inertia separator 30 according to the present embodiment, the pressure difference between the inside and outside of the container 6 required for sending the powder raw material 2 from the powder delivery unit 4 at substantially the same initial speed is determined by the pressure adjusting pump 8. In addition to the atmospheric pressure adjustment, it can be obtained by adjusting the atmospheric pressure in the introduction chamber 31 higher than the atmospheric pressure in the container 6 by the atmospheric pressure adjusting pump 32.
Therefore, finer settings for sorting and collecting can be made according to the particle diameter or specific gravity of the powder in the powder raw material 2.

That is, when selecting and recovering the powder raw material 2 composed of powder groups having different particle diameters or specific gravity of individual powders, the powder having the large particle diameter or high specific gravity is the small particle diameter or low specific gravity. Therefore, when the air pressure in the container 6 is low, the air resistance as a resistance against the movement is reduced, and the space capacity of the container 6 is limited. Depending on the size of the powder recovery unit 7, the powder may be dropped from the powder delivery unit 4 beyond the powder recovery unit 7. Therefore, it is necessary to increase the atmospheric pressure in the container 6. However, in the inertial separator 1 in the first embodiment, when the atmospheric pressure in the container 6 becomes higher than the atmospheric pressure, the powder raw material 2 is sent into the container 6. For this reason, the suction force is not obtained.
In addition, even when the pressure in the container 6 is less than atmospheric pressure, the container 6 is sufficient to feed the powder having a large particle diameter or high specific gravity to an initial velocity substantially equal to that of the powder having a small particle diameter or low specific gravity. An internal / external pressure difference may not be obtained.
On the other hand, in the inertial separator 30 according to the second embodiment, the air pressure in the introduction chamber 31 by the air pressure adjusting pump 32 is made higher than the air pressure in the container 6, so that the large particle diameter or high specific gravity powder. Sufficient pressure difference between the inside and outside of the container 6 can be obtained so that an initial velocity substantially equal to that of a powder having a small particle diameter or low specific gravity can be delivered. Since it can be set relatively high even when the pressure is lower than the atmospheric pressure, it is possible to set to perform higher range sorting and collection corresponding to the particle diameter or specific gravity of the powder in the powder raw material 2 to be sorted and collected. It becomes.
From this point of view, a pressure type and a pressure reduction type pump can be appropriately selected and employed as the pressure control pump 8 as the first pressure control pump in the present embodiment. As long as the atmospheric pressure in the introduction chamber 31 can be made higher than the atmospheric pressure in the container 6, a pressure-type and a pressure-reduced pump can be appropriately selected and employed as the atmospheric pressure adjusting pump 32.
In particular, when a powder having a small particle size and a low specific gravity is selected as the powder raw material 2, the pressure adjusting pump 32 is set to a pressure reducing type to reduce the pressure in the introduction chamber 31, and the pressure adjusting pump 8 is used. It is preferable that the pressure in the container 6 is reduced as the reduced pressure type. At this time, the pressure difference between the air pressure in the introduction chamber 31 and the air pressure in the container 6 is made smaller than the case where a powder having a large particle size and high specific gravity is selected as the powder raw material 2, and If the air pressure in the introduction chamber 31 is adjusted to be higher than the air pressure, a suction force sufficient to suck the powder raw material 2 into the container 6 at a substantially equal initial speed works and is sent into the container 6. A sufficient drag force (air resistance) acts to select the powder raw material 2 that has been selected, and the powder raw material 2 can be selected and recovered by particle size or specific gravity.

(Third embodiment)
Subsequently, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an explanatory diagram showing an overview of an inertial separator device 50 according to the third embodiment of the present invention.
The inertia separator device 50 is configured by disposing a powder introduction portion 53 in place of the powder introduction portion 5 in the inertia separator 1 according to the first embodiment.

The powder introduction unit 53 includes a powder input unit 51 and a powder delivery unit 52.
The powder input unit 51 has a funnel shape, and collects the powder raw material 2 input from the expanded input port and transfers it to the powder delivery unit 52 from the throttle port side. An openable / closable shutter (not shown) is disposed at the aperture, and can be controlled so as to be closed after the powder raw material 2 is transferred to the powder delivery unit 52 by a certain amount in the open state.

The powder delivery unit 52 has a power unit that transmits mechanical power to the powder raw material 2 for delivery. FIG. 4 shows an example of the structure.
The power unit 60 has a simple extruder structure, and includes a rotating roller 61 driven by a motor, a feeding head 62 that extrudes and feeds the powder raw material 2, and a proximal end that is pivotally supported by the rotating roller 61. The side has an arm part 63 pivotally supported by the delivery head 62.
The powder delivery part 52 has the power part 60 and a tubular member 65 extending in the direction in which the delivery head 62 is pushed out. In a part of the tubular member 65, a communication port 64 that is communicated with the throttle port of the powder charging unit 51 is formed.
The tubular member 65 is preferably disposed such that the axial direction of the tubular member 65 is parallel to the horizontal direction so that the powder raw material 2 can be horizontally projected.
The power unit is not limited to the illustrated example as long as it transmits mechanical power to the powder raw material 2 and outputs the power. Conventionally known configurations such as a throwing device and a belt conveyor having the same function are available. Can be adopted as appropriate.

  A certain amount of the powder raw material 2 delivered from the powder input unit 51 through the communication port is held in the tubular member 65. The held powder raw material 2 is extruded by the delivery head 62 based on the driving of the rotating roller 61 and delivered into the container 6.

In the inertia separator 50 configured as described above, unlike the inertia separator 1 according to the first embodiment, the power unit 60 has a function of sending the powder raw material 2 into the container 6 at a substantially equal initial speed.
Accordingly, in the present embodiment, unlike the first embodiment, it is sufficient that the atmospheric pressure in the container 6 for adjusting the powder recovery position is adjusted, and the air pressure difference between the inside and outside of the container 6 is not restricted. The powder raw material 2 can be sorted and recovered.
It should be noted that the selection and recovery of the present embodiment can be performed in the container 6 in any environment of reduced pressure and increased pressure.

(Fourth embodiment)
Subsequently, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory view showing an outline of an inertial separator device 70 according to the fourth embodiment of the present invention.
The inertia separator device 70 is configured by disposing a container 71 in place of the container 6 in the inertia separator 50 according to the third embodiment.

The container 71 can maintain its internal airtightness, and is an overall substantially cylindrical member having an umbrella-like body portion similar to the container 6 inside. The powder introduction part 53 is included in the container 71 and is arranged at the apex position of the umbrella-like body part.
However, an opening is formed in the upper part of the umbrella-like body part, and the whole inside the container 71 can be adjusted at the same atmospheric pressure.

That is, when the powder raw material 2 is sent out at substantially the same initial speed using the mechanical power of the power unit 60, there is no need to form a pressure difference between the inside and outside of the container. The space and the space in which the powder raw material is delivered from the powder delivery unit 52 of the powder introduction unit 53 may be adjusted at the same atmospheric pressure.
Therefore, as the container in the inertial separator device of the present invention, as in the container 6 according to the third embodiment and the container 71 in the fourth embodiment, the internal airtightness is maintained, and the powder delivery unit is contained in the inside. There is no particular limitation as long as the structure has a space in the delivery direction of the powder raw material 2 delivered from 52, and various structures can be adopted.

In order to confirm the usefulness of the present invention, an inertia separator device according to an example having substantially the same configuration as that of the inertia separator device 1 according to the first embodiment was manufactured.
Specifically, a vacuum chamber having a predetermined capacity is a container 6, a commercially available oil rotary vacuum pump (manufactured by ULVAC, PKS-016) is an atmospheric pressure adjustment pump 8, and the container 6 has a predetermined diameter. A sample introduction tube was attached to form a powder introduction unit 5, and a bowl-like collection case for sorting and collecting samples was arranged at the bottom of the container 6 to form a powder collection unit 7. The collection area of the powder collection unit 7 was formed by dividing the collection case at 7 cm intervals.

As a powder raw material used as a sample, commercially available micro glass beads made of low alkali glass (manufactured by Potters Ballotini Co., Ltd., EMB-10) were used. The specifications of the micro glass beads are an average particle diameter of 5 μm, a particle diameter range of 2 to 10 μm, and a bulk specific gravity of 0.6 g / cm ³ .

For the inertial separator device according to this example, first, the inside of the vacuum chamber was deaerated to a predetermined degree of vacuum, and then the open / close valve of the sample introduction tube was opened, and waited until the degree of vacuum was stabilized again. .
Next, the sample was introduced into the introduction port of the sample introduction tube, and sucked so that the sample was horizontally projected into the vacuum chamber.
After the sample was aspirated, the pressure in the vacuum chamber was gradually returned to atmospheric pressure, and then the sample was collected for each collection region in the collection case.
The sample recovery test was performed as described above, the recovered sample was observed with a scanning electron microscope (JSM-5410, manufactured by JEOL Ltd.), and the particle size and the like were calculated by image analysis of the captured image.

Regarding the inertial separator device according to the example, FIG. 6 shows a graph obtained by calculating a trajectory when a particle having a particle diameter of 1 μm, a particle having a particle diameter of 2 μm, and a particle having a particle diameter of 5 μm is horizontally projected. In the calculation, without considering detailed coefficient changes during flight, the pressure in the vacuum chamber was set to 1,000 Pa, and the initial speed at the time of delivery was set to 10 m / s.
As shown in FIG. 6, it is suggested that the drop position differs depending on the size of the particles.

The result of the sample recovery test is shown in FIG.
As shown in FIG. 7, with respect to the original sample (Original), a collection position 1 (a collection area near the sample introduction pipe) and a collection position 4 (a collection area far from the sample introduction pipe) And showed different particle size-integrated distribution characteristics. Further, at the collection position 1, a large amount of powder having a particle size smaller than that at the collection position 4 is distributed, and it can be confirmed that sorting and collection are possible for each particle size.

8A to 8C show SEM images of the original sample, the sample at the collection position 1, and the sample at the collection position 4, respectively.
Here, the average particle diameter of the sample at the collection position 1 was confirmed to be 2.8 μm, and the average particle diameter of the sample at the collection position 4 was confirmed to be 6.2 μm.
As described above, in the SEM image of the sample at the collection position 4 with respect to the SEM image of the sample at the collection position 1, many particles having a large particle diameter are collected and can be sorted and collected for each particle diameter. It can be confirmed that there is.

DESCRIPTION OF SYMBOLS 1,30,50,70 Inertial separator apparatus 2 Powder raw material 3,51 Powder input part 4,52 Powder delivery part 5,53 Powder introduction part 6,71 Container 7 Powder collection part 7a-7h Collection area 8 Atmospheric pressure adjusting pump 9,33 Barometer 10,34 Atmospheric pressure adjusting mechanism 11,12 Trajectory 31 Introducing chamber 32 Atmospheric pressure adjusting pump 60 Power unit 61 Rotating roller 62 Sending head 63 Arm unit 64 Communication port 65 Tubular member

Claims (11)

A powder input unit into which a powder material to be selected is input, and a powder output unit capable of transmitting the input powder material in one direction so as to be given a motion vector of a horizontal component. Having a powder introduction part,
A container having internal airtightness, and having a space in the delivery direction of the powder raw material delivered from the powder delivery unit therein,
Arranged at a spatial position in the container where the height position is lower than the highest reaching point of each powder in the powder raw material sent into the container from the powder delivery part, and sent into the container A powder recovery unit having a plurality of recovery areas defined according to the position where the powder changes according to its particle diameter or specific gravity and falls;
An atmospheric pressure adjustment mechanism having an atmospheric pressure adjustment pump connected to the container and adjusting the atmospheric pressure in the container;
Of the powders in the powder raw material, the powder delivered from the powder delivery unit at an approximately equal initial speed falls onto the powder collection unit by adjusting the atmospheric pressure in the container. An inertial separator device, which is set to be   The inertia separator device according to claim 1, wherein the powder introduction unit includes a powder delivery unit that delivers the powder raw material in a substantially horizontal direction.   The inertia separator device according to claim 1, wherein the powder recovery unit includes a mechanism that makes the number and size of the recovery regions variable.   The inertial separator device according to any one of claims 1 to 3, wherein the powder delivery unit is a tubular member having one end connected to the powder input unit and the other end connected to the container via an on-off valve.   The pressure inside the container is maintained at a pressure lower than the pressure outside the container, and the powder raw material is sucked into the container from the powder delivery section due to a pressure difference between the inside and outside of the container and sent out. The inertial separator device according to any one of the above.   Furthermore, the powder introduction part is included, and an air pressure adjustment that is connected to the introduction chamber that maintains the airtightness of the inside and that is connected to the introduction chamber, and adjusts the pressure inside the introduction chamber to a pressure higher than the pressure inside the container. The inertial separator device according to claim 1, further comprising an atmospheric pressure adjusting mechanism having a pump.   The inertial separator device according to any one of claims 1 to 3, wherein the powder delivery unit includes a power unit that transmits mechanical power to the powder raw material.   The inertial separator device according to claim 7, wherein the power unit includes an extruder that extrudes the powder raw material in a horizontal direction.   The inertial separator device according to any one of claims 1 to 8, wherein the inertial separator device has a radius of 1 cm or less, and selects and collects the powder raw material that falls after being sent from the powder delivery unit along a trajectory that draws a constant downward curve. A powder input unit into which a powder material to be selected is input, and a powder output unit capable of transmitting the input powder material in one direction so as to be given a motion vector of a horizontal component. A powder introduction part having a container having a space in a delivery direction of the powder raw material to be delivered from the powder delivery part inside thereof, and an inside of the container from the powder delivery part. Placed in a space position in the container whose height position is lower than the highest reaching point of each powder in the powder raw material sent to the container, and the powder sent into the container has a particle diameter or specific gravity. A powder recovery unit having a plurality of recovery areas defined according to the position of falling and changing each time, and an atmospheric pressure adjustment mechanism having an atmospheric pressure adjustment pump connected to the container and adjusting the atmospheric pressure in the container The powder raw material is selected using an inertia separator device having A powder raw material sorting recovery method to be recovered,
Of the powders in the powder raw material, the powder delivered from the powder delivery unit at an approximately equal initial speed falls onto the powder collection unit by adjusting the atmospheric pressure in the container. A method for selecting and collecting powder raw materials.   The powder raw material according to claim 10, wherein the pressure inside the container is reduced to a pressure lower than the pressure outside the container, and the powder raw material is sucked into the container by a pressure difference between the inside and outside of the container and sent out from the container. Sorting and collecting method.