KR20150124904A - Cyclone for manufacturing nano powder and apparatus of using the same - Google Patents

Abstract

Provided are cyclone for a manufacturing device of nanopowder and a manufacturing device of nanopowder comprising the same. According to an exemplary embodiment of the present invention, cyclone for a manufacturing method of nanopowder comprises: a body having an inner space in which gas containing nanopowder introduced through an inflow hole descends along an inner wall surface; and a guide unit equipped on the inner wall surface of the body for guiding a flow direction so as to turn and descend the gas containing the nanopowder in a spiral form.

Description

Technical Field [0001] The present invention relates to a cyclone for manufacturing a nano powder and a device for manufacturing the same,

The present invention relates to a cyclone for manufacturing a nano powder and a device for manufacturing a nano powder including the same. More particularly, the present invention relates to an apparatus for manufacturing a nano powder, Which can improve the yield of nanopowder and classify the nanopowder by size, and a nanopowder manufacturing apparatus including the same.

In general, a spherical fine powder having a nanosize size has a very large surface area per volume, and thus has been used for a wide variety of applications in various fields such as aviation, electronics, ceramics, and medicine. Therefore, in recent years, research and development have continued to minimize the size of the fine powder and use the characteristics more actively.

As a technique for producing a fine powder, there is known a method of mechanically grinding a micro-sized bulk powder. However, in the case of a mechanical grinding method, there is a limitation in reducing the size of a fine powder to 500 nm or less. Therefore, A manufacturing method is widely used.

In the method of manufacturing fine powder using plasma, a raw material and a plasma gas are injected into a reactor to generate a plasma, the raw material is melted and evaporated by the plasma, and then cooled to produce a nano powder. There is an advantage that the raw material can be selectively used.

In this case, the nanoparticles finely atomized by the plasma are classified by the cyclone to have a uniform particle size. 1, the cyclone 10 includes a body 11, an inlet 12 formed along one side of the body 11 in a tangential direction, And an outlet (13), and classifies the nano powder in the following manner.

That is, the nano powder injected into the body 11 through the inlet port 12 forms a circulation flow by blowing air generated from a pump, a blower or the like. In this process, And the particles having a small specific gravity are concentrated to the center and then conveyed to the collecting portion side through the discharge port 13 by the ascending air flow.

However, according to the conventional art as described above, the body 11 is composed of the conical first body portion 11a and the cylindrical second body portion 11b formed at the lower portion of the first body portion 11a There is a problem that the yield of the nano powder is low.

That is, in order to improve the yield of the nano powder, a spiral rising air current must be actively formed inside the body 11. According to the related art, the second body portion 11b, in which the upward airflow is induced, The strength of the ascending air flow is inevitably small. As a result, there is a problem that the yield of the nano powder is lowered.

Further, since the inclination angle of the sidewall with respect to the bottom surface of the body 11 and the length of the discharge port 13 through which the ascending air current passes are constant, there is a problem that only the nanopowder having a limited particle size can be captured.

KR 10-1296112 B1

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to improve the yield of nano powder by promoting separation of nano powder contained in a gas by increasing the centrifugal force of a falling gas, The present invention provides a cyclone for a nano powder manufacturing apparatus and a manufacturing apparatus for the nano powder including the same.

It is another object of the present invention to provide a cyclone for a nano powder manufacturing apparatus and an apparatus for manufacturing the same that can improve the yield of nano powder by inducing the development of ascending airflow generated in the cyclone.

Further, the present invention provides a cyclone and a nano powder manufacturing apparatus for a nano powder manufacturing apparatus capable of obtaining a nano powder having various particle size distributions according to the size or specific gravity of a nano powder by sequentially arranging a plurality of cyclones, .

In order to solve the above-described problems, the present invention provides a cyclone for a nano powder production apparatus disposed between a reaction chamber and a collecting portion, wherein the cyclone is configured such that a gas introduced through an inlet port falls along the inner wall surface, A body having an inner space in which a nano powder having a predetermined size or larger is separated from the gas; And a guide portion provided on an inner wall surface of the body and guiding a flow direction of the gas so that the gas can be spirally lowered in a spiral manner.

The guide portion may be a plate-shaped guide plate having a predetermined length, and may be provided in a spiral shape along the height direction on the inner wall surface of the body.

In addition, the guide plate may be provided with a through hole formed through the nano powder separated by the centrifugal force from the base so as to pass downward.

Also, the body may be provided so that its inner diameter gradually decreases from the upper portion to the lower portion.

In addition, a gas supply pipe may be provided on the outer side of the body to increase the speed of the gas circulating along the inner wall surface of the body by injecting gas toward the inner space.

The gas supply pipe and the body are connected to each other through a plurality of connection pipes to inject gas into the inner space side from the gas supply pipe and the plurality of connection pipes include the nano powder flowing along the inner wall surface of the body And may be arranged in a direction coinciding with the flow direction of the gas.

The bottom of the body is provided with a hollow tube for guiding upwardly the gas dropped along the inner wall of the body. The tube is arranged such that its lower end is in contact with the bottom, An opening for introducing the gas dropped to the bottom surface of the body into the inside of the bulb tube may be formed at a predetermined height from the lower end to the upper end.

In addition, the bulb includes a first portion whose inner diameter gradually increases from the lower portion to an upper portion and a second portion whose inner diameter gradually decreases from the lower portion to the upper portion, and the second portion is disposed below the first portion .

According to another aspect of the present invention, A plasma generator coupled to the reaction chamber and generating a plasma to generate a nano powder by vaporizing the supplied raw material; A cyclone separating a nano powder having a predetermined size or larger from a gas containing nano powder transferred from the plasma generating unit; And a collecting part having at least one filter member and collecting the nano powder from the gas transferred from the cyclone, wherein the cyclone is configured such that the gas introduced through the inlet from the reaction chamber descends along the inner wall surface, A body having an inner space in which a nano powder having a predetermined size or larger is separated from the base body; And a guide part provided on an inner wall surface of the body and guiding a flow direction of the gas so that the gas can be spirally lowered in a spiral manner.

In addition, a plurality of the cyclones may be sequentially connected, and adjacent cyclones may be connected to an inlet of a cyclone in which a discharge port of the cyclone disposed at the front side is disposed at the rear side.

The plurality of cyclones may include a discharge pipe connected to the discharge port and having a predetermined length protruding toward the inner space. The discharge port may include a discharge port extending from the lower end of the discharge pipe provided in each cyclone toward the rear side along the moving direction of the gas, The distance to the bottom surface of the body can be shortened.

Further, the plurality of cyclones are provided such that the inner diameter of each of the plurality of cyclones gradually decreases from the upper portion to the lower portion, and the angle between the bottom surface and the side portion constituting the body gradually increases from the front side to the rear side along the moving direction of the base body Can be large.

According to another aspect of the present invention, A plasma generator coupled to the reaction chamber and generating a plasma to generate a nano powder by vaporizing the supplied raw material; A cyclone separating a nano powder having a predetermined size or larger from a gas containing nano powder transferred from the plasma generating unit; And a collecting unit having at least one filter member and collecting the nano powder from the gas transferred from the cyclone, wherein the plurality of cyclones are sequentially connected, the plurality of cyclones are connected to the discharge port, Wherein a distance from a lower end of the discharge pipe provided in each cyclone to a bottom surface of the body is different from a front side to a rear side along a moving direction of the gas, The nano-powder production apparatus comprising:

At this time, the plurality of cyclones may be arranged so that the distance from the lower end of the discharge pipe provided in each cyclone to the bottom surface of the body decreases from the front side to the rear side along the moving direction of the gas.

According to another aspect of the present invention, A plasma generator coupled to the reaction chamber and generating a plasma to generate a nano powder by vaporizing the supplied raw material; A cyclone separating a nano powder having a predetermined size or larger from a gas containing nano powder transferred from the plasma generating unit; And a collecting unit having at least one filter member and collecting the nano powder from the gas transferred from the cyclone, wherein a plurality of the cyclones are provided and sequentially connected, and the plurality of cyclones are arranged in a direction The angle between the bottom surface and the side surface of the body may be different from each other.

At this time, the plurality of cyclones may be arranged so that the angle between the bottom surface and the side portion of the body gradually increases from the front side to the rear side along the moving direction of the base body.

According to the present invention, it is possible to improve the yield of nano powder by improving the centrifugal force of the falling gas while swirling through the structural improvement of the cyclone to promote the separation of the nano powder contained in the gas.

In addition, the present invention can arrange a plurality of cyclones sequentially to obtain nanopowders having various particle size distributions according to the size or specific gravity of the nanopowder.

1 is a cross-sectional view of a conventional cyclone for a nano powder production apparatus,
FIG. 2 is a schematic view showing a nanopowder manufacturing apparatus according to an embodiment of the present invention,
FIG. 3 is a schematic view showing a plasma generating part applied to FIG. 2,
Fig. 4 is a perspective view showing a cyclone for a nano powder production apparatus applied to Fig. 2,
5 is a cross-sectional view of Fig. 4,
FIG. 6 is a perspective view showing another type of cyclone for a nano powder production apparatus applied to FIG. 2;
Fig. 7 is a sectional view of Fig. 6,
FIG. 8 is a perspective view showing a bellows used in a cyclone for a nano powder production apparatus according to the present invention,
FIG. 9 is a schematic view showing a case where a plurality of cyclones are sequentially arranged in the nano powder production apparatus according to the present invention,
Fig. 10 is a modification of Fig. 9,
Fig. 11 is still another modification of Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

2, the apparatus 100 for manufacturing a nano powder according to an exemplary embodiment of the present invention includes a reaction chamber 110, a plasma generator 120, a cyclone 130, and a collecting unit 140 as shown in FIG.

The reaction chamber 110 is for vaporizing the raw powder supplied from the powder feeder 150 through a high-temperature plasma.

The raw material powder supplied from the powder feeder 150 is in the form of a micro-sized bulk powder and is provided in the form of a bulk powder of 20 μm or less, preferably 14 μm, so as to be injected into the plasma generating portion 120 side do.

The plasma generating part 120 is coupled to the reaction chamber 110 at the upper side and connected to the cyclone 130 through a transfer pipe.

Herein, not only the raw material powder but also a carrier gas for transporting the nanopowder vaporized by the plasma, a cooling gas for cooling the vaporized nanopowder, etc. may be injected into the reaction chamber 110.

The plasma generator 120 is coupled to the upper side of the reaction chamber 110 to generate a plasma at a temperature of 10,000 to 14,000 ° C to vaporize the raw material powder supplied from the powder supplier 150.

3, the plasma generator 120 includes an injection tube 122 having a nozzle 122a for injecting a carrier gas and a raw powder into the reaction chamber 110, And an induction coil 126 wound around an outer circumferential surface of the induction pipe 124. The induction coil 124 is wound around the induction coil 124 and is wound around the induction coil 124. [

The gap 127 is formed so that the outer diameter of the injection pipe 122 is smaller than the inner diameter of the induction pipe 124. Sheath is supplied through the gap 127, Thereby preventing adsorption of the injection tube 122 and the induction tube 124 by the powder.

The sheath gas may be an argon gas, a nitrogen gas, a hydrogen gas, or a mixed gas thereof. The carrier gas may be an argon gas or a nitrogen gas, a mixed gas thereof, or the like.

The induction coil 126 is for generating a plasma through induction heating when a high frequency is applied. That is, when RF frequency power is applied to the induction coil 126, induction heating occurs in the induction pipe 124 to generate plasma. In this plasma state, electrons are accelerated by a magnetic field generated when a high frequency current flows through the induction coil 126, and collide with the surrounding argon gas to be ionized to generate new electrons and argon ions. The generated electrons again propagate argon gas to act as a proliferation of electrons, so that a plasma state with a very high electron density is maintained.

Here, the induction coil 126 may be formed of a copper tube, and if necessary, cooling water may be allowed to flow into the copper tube to cool the induction coil 126.

Accordingly, the raw material powder injected together with the carrier gas through the injection tube 122 is vaporized through the plasma generated by the induction coil 126, and then falls into the reaction chamber 110 together with the carrier gas And is quenched by a cooling gas supplied to the interior of the reaction chamber 110 to be synthesized into a nano-sized powder.

The nano powder is discharged from the reaction chamber 110 by the pumping operation of the pump 160 and is transferred to the collecting part 140 via the cyclones 130 and 230. Here, the gas discharged from the reaction chamber 110 together with the nano powder is separated from the nano powder and exhausted to the outside.

At this time, the power source applied to the induction coil 126 may be supplied through a separate power supply unit, and the power source may have a predetermined frequency, for example, 1 to 4 MHz.

An oscillator is provided between the power supply unit and the plasma generation unit 120 so that the power supplied from the power supply unit is amplified to about 80 kW, for example, and then the amplified power is supplied to the induction coil 126 side. Can be connected.

In addition, an impedance matching unit (not shown) is provided between the oscillator and the plasma generating unit 120 to match the impedance of the oscillator and the plasma generating unit 120 so that the amplified power is transmitted without loss.

The cyclone 130 is connected to the reaction chamber 110 to cool down the nano powder transferred from the reaction chamber 110 while filtering the nanopowder having a predetermined size or larger down and filtering the nano powder. Gas, sheath gas, and the like to the collecting part 140 disposed at the rear end.

That is, in the cyclone 130, the nano powder introduced through the inlet 131 together with the carrier gas and the like descend along the inner wall surface, and the large and heavy nano powders are accumulated in the lower part, (140).

To this end, the cyclones 130 and 230 according to the present invention include a body 133 and a guide portion 134 as shown in FIGS.

The body 133 is provided as an enclosure having an internal space 138 for allowing the gas containing the nano powder introduced from the reaction chamber 110 to descend.

An inlet 131 for introducing the gas including the nano powder into the inner space 138 is provided at one side of the body 133. The collector 133 is provided at an upper side of the body 133, And a discharge pipe 136 protruding to a side of the internal space 138 of the body 133 by a predetermined length is connected to the discharge port 132. [

At this time, the inlet 131 is provided in the tangential direction with respect to the body 133, so that the gas including the nano powder flowing into the inner space 138 is lowered while being rotated along the inner wall surface of the body 133 .

Accordingly, the relatively large nano powder is separated from the gas by the centrifugal force, flows down on the inner wall surface of the body 133, and the gas having a relatively small weight flows down along the inner wall surface of the body 133 And then ascends while forming an ascending air flow at the center of the body 133 and is transported toward the collecting part 140 through the discharge port 132. [

At this time, the inner wall surface of the body 133 is provided with a guide portion 134 for guiding the flow direction of the gas including the nano powder flowing through the inlet 131.

That is, the guide portion 134 is formed as a plate-shaped guide plate having a predetermined length and is arranged in a spiral shape along the inner wall surface of the body 133 so that one end of the guide plate contacts the inner wall surface of the body 133.

Accordingly, the gas including the nano powder flowing into the inner space 138 through the inlet 131 can be smoothly guided downward by being guided by the guide part 134 in the flow direction.

In addition, the guide part 134 acts as a partition for partitioning the inner wall surface of the body 133, so that the gas including the nano powder can evenly pass through the entire inner wall surface of the body 133 . Accordingly, by increasing the overall flow distance of the gas, it is possible to prevent the nanoparticles having a predetermined size or more contained in the gas from being discharged to the discharge port 132 through the upward flow without being separated from the gas.

At this time, the guide part 134 is formed so that the through hole 135 of the elongated hole penetrates through the guide part 134 so that the nano powder having a predetermined size or more separated from the base by the centrifugal force can smoothly fall downward along the inner wall surface of the body 133 .

The through hole 135 may be formed with respect to the entire length of the guide portion 134 or may be partially formed.

Here, the through hole 135 is formed at one side of the body 133 so that the nano powder having a predetermined size or more falling along the inner wall surface of the body 133 can smoothly move without being loaded on the guide part 134 And may be provided so as to abut against the inner wall surface.

6 and 7, the cyclone 230 according to the present invention injects a gas toward the inner space 138 on the outer side of the body 133 to form an inner wall surface of the body 133, In detail, a gas supply pipe 180 may be provided to increase the speed of the gas circulating along the guide portion 134.

The gas supply pipe 180 is formed in a spiral shape having a predetermined radius of rotation with respect to the central axis, such as a coil spring, and is disposed to surround the outer side of the body 133.

The gas supply pipe 180 is connected to the body 133 through a plurality of connection pipes 182 so that a gas (hereinafter referred to as a "second gas") flows through the connection pipe 182 into the internal space 138).

At this time, the plurality of connection pipes 182 are arranged in a direction coinciding with a flow direction of a gas (hereinafter referred to as a "first gas") including nano-powder that descends downward along the inner wall surface of the body 133 .

For example, the gas supply pipe 180 may have the same shape as the guide part 134 provided on the inner wall surface of the body 133, and may be disposed so as to surround the outer circumferential surface of the body 133, The tube 182 may be arranged in a direction coinciding with the flow direction of the first gas that is swirling down along the inner wall surface of the body 133.

Accordingly, the first gas injected through the coupling pipe 182 is injected in the same direction as the second gas flowing along the inner wall surface of the body 133, thereby increasing the speed of the second gas . As a result, the centrifugal force of the second gas increases due to the increase of the velocity, thereby promoting the separation of the nano powder having a predetermined size or more contained in the second gas.

The second gas injected into the body 133 through the coupling pipe 182 reacts with the sheath gas and the carrier gas by using a gas similar to the sheath gas and the carrier gas described above, To prevent it from happening.

In addition, a powder recovery box (not shown) may be provided on the lower side of the body 133 for recovering nano powder having a predetermined size or more separated from the gas descending and descending along the guide part 134.

Meanwhile, the body 133 may be provided so that the inner diameter gradually decreases from the upper portion to the lower portion. That is, the body 133 is formed so that the inner diameter increases from the lower part to the upper part along the height direction.

This is because the upward or downward flow of the gas swirled down through the guide part 134 causes the bottom surface of the body 133 to collide with the bottom surface of the body 133, So that an ascending air current developed in a spiral manner can be actively formed.

That is, the nano powder generated through the plasma generating unit 120 and the reaction chamber 110 flows into the cyclone 130 and 230 from the reaction chamber 110 by the force of wind generated from a pump or a blower, The circulation air flows downward, and is changed to a rising airflow by the direction of the bottom surface of the body 133.

At this time, since the upward airflow increases the helix radius toward the upward, if the inner diameter of the body 133 is the same, the upward airflow can not actively develop.

Accordingly, in the present invention, the inner diameter of the body 133 gradually increases from the lower part to the upper part, thereby inducing the development of the ascending airflow, so that a large amount of nano powder can be transferred, thereby improving the overall yield.

A bulb 137 may be disposed on the bottom surface of the body 133 to guide the first body lowered along the inner wall surface of the body 133 and guide the upwardly directed gas.

As shown in FIG. 8, the bulb 137 is provided in a hollow shape having an open top and a bottom, and the bottom end thereof is disposed in contact with the bottom surface. At this time, an opening 137c is formed at one side of the bulb 137 so as to be incised upwards from the lower end.

The opening 137c serves as a passage for introducing the first gas dropped down to the bottom surface of the body 133 into the inside of the bulb 137. At this time, the opening 137c can be partially provided on the lower side of the bulb 137. This is because the spiral-shaped first body descends to the bottom surface of the body 133, flows into the interior of the bulb 137 through the opening 137c, and then restricts movement in the horizontal direction through the sealed portion So that it can move to the open top side of the bulb 137.

In this case, the bulb 137 includes a first portion 137a having an inner diameter gradually increasing from the lower portion to an upper portion, and a second portion 137b having an inner diameter gradually decreasing from the lower portion toward the upper portion. 137b are disposed below the first portion 137a. Here, the opening 137c is provided at one side of the second portion 137b.

Accordingly, the first gas lowered along the inner wall surface of the body 133 flows smoothly into the interior of the bulb 137 through the second portion 137b having a relatively large inner diameter, The development of the ascending airflow can be induced through the first portion 137a whose inner diameter is gradually increased.

The collecting unit 140 collects the nano powder contained in the gas transferred from the cyclones 130 and 230.

At least one filter member 144 is disposed in the chamber 142 to collect the nano powder contained in the gas transferred from the cyclones 130 and 230.

Here, the filter member 144 may be a filter member made of a metal mesh having a plurality of grids, and the grating size of the filter member 144 may be appropriately adjusted in consideration of the size of the nano powder to be collected have. In this case, the nano powder collected by the filter member 144 may have a particle size distribution of 20 nm to 100 nm, and may have an average size of 50 nm.

At this time, the nano powder adsorbed on the filter member 144 is detached from the filter member 144 by blowing gas through the pump 160 connected to the rear end of the collecting unit 140.

Between the pump 160 and the collecting part 140, a heat exchanging part 170 for further cooling the gas flowing together with the nano powder may be additionally provided. The heat exchanging unit 170 can apply an air cooling method using a cooling gas, and can cool the carrier gas, the sheath gas and the like to room temperature and safely discharge it to the outside.

9, a plurality of cyclones disposed between the reaction chamber 110 and the collecting unit 140 are provided, and the plurality of cyclones 130 and 130 The plurality of cyclones 130, 130 'and 130' 'are arranged to be connected to the inlet of the cyclone disposed at the rear side, respectively, with the outlet of the cyclone disposed at the front side.

The cyclone closest to the reaction chamber 110 may be referred to as a first cyclone 130 and the cyclone closest to the trapping unit 140 may be referred to as a third cyclone The cyclone disposed between the first cyclone 130 ", the first cyclone 130 and the third cyclone 130 "will be referred to as the second cyclone 130 '. However, it is to be understood that the number of the cyclones to be installed is not limited thereto, and that a variety of cyclones may be provided.

This is because the plurality of cyclones 130, 130 ', and 130 "are sequentially connected to each other, so that the nano powder separated from the gas while descending along the inner wall surface of the body in each cyclone, So that they can be separated in order.

For this purpose, the plurality of cyclones 130, 130 ', 130 "includes a discharge tube 136 having a predetermined length, and the discharge tube 136 is connected to an outlet 132 formed in each body 133 And protrudes a predetermined length from the discharge port 132 to the inner space 138 side of the body 133.

Here, the plurality of cyclones 130, 130 ', 130 "have the same configuration except for the length of the discharge pipe 136. In addition, the plurality of cyclones 130, 130' And the discharge port 132. [0051] As shown in FIG.

At this time, the respective discharge pipes 136 provided in the plurality of cyclones 130, 130 ', 130' 'have different distances H1, H2 and H3 from the lower end of the discharge pipe to the bottom surface of the body 133 And the discharge pipe of the cyclone disposed on the front side may be provided to have a relatively longer length than the discharge pipe of the cyclone disposed on the rear side.

That is, the length of the discharge pipe 136 provided in the first cyclone 130 is the longest and the length of the discharge pipe 136 provided in the third cyclone 130 'is the shortest. H2 and H3 from the lower end of the discharge pipe 136 to the bottom surface of the body 133 have the shortest length of the first cyclone 130 and the longest length of the third cyclone 130 ".

In other words, since the lengths of the discharge pipes provided in the respective cyclones 130, 130 ', and 130' are different from each other, the rising height of the first gas, which must reach each of the discharge pipes 136 when the first gas is raised by the upward flow, .

Accordingly, the size of the nano powder contained in the first gas discharged from each of the bodies through each of the discharge tubes 136 while sequentially passing through the plurality of cyclones 130, 130 ', and 130 " And gradually becomes smaller.

This is because the nanopowder having a relatively large particle size is separated in an ascending process due to its own weight due to an increase in the height of elevation, and only the nanopowder having a relatively small particle size is included in the first gas and discharged through the discharge pipe.

Thus, the nano powder manufacturing apparatus 200 according to the present invention can separate nano powders having similar sizes in each cyclone through the plurality of cyclones 130, 130 ', and 130 ".

For example, the first gas flowing from the first cyclone 130 to the second cyclone 130 'may include nanopowders having a size of 20 to 300 nm, and the third gas may flow from the second cyclone 130' The first gas introduced into the cyclone 130 " may include nano powder having a size of 20-150 nm. The first gas introduced into the third cyclone 130 " The nano powder having a size of 20 to 100 nm can be collected through the filter member 144 in the collecting part 140. [

Meanwhile, as shown in FIG. 10, the apparatus 300 for fabricating a nano powder according to the present invention is a method for classifying the nano powder contained in the first base by size, wherein a plurality of cyclones are provided, The angles (? ₁ ,? ₂ ,? ₃ ) between the bottom surface of the body 133 and the side of the body gradually increase from the front side toward the rear side along the moving direction of the first base body It may be configured to be larger.

Here, the plurality of cyclones 130, 130 'and 130''are provided such that the inner diameter of the body having the inner space gradually decreases from the upper portion to the lower portion, and between the bottom surface and the side portion of the body 133 constituting each cyclone The plurality of cyclones 130, 130 'and 130''are provided in the form of a basic structure including only an inlet 131 and an outlet 132, and each of the cyclones 130, 130', and 130 ' Only the angles? ₁ ,? ₂ ,? ₃ between the bottom surface and the side surface of the constituting body 133 may be different from each other.

For example, the body 133 constituting the first cyclone 130 has an angle? ₁ between the bottom surface and the side surface of 75 degrees, and the body 133 constituting the second cyclone 130 ' constitute the angle (θ ₂₎ between the bottom surface and the side 80 degrees, wherein the body (133) constituting the third cyclone (130 ") is to configure the angle (θ ₃₎ between the bottom surface and the side 85 degrees .

Accordingly, the first gas moved to the bottom surface along the inner wall surface of the body 133 from each of the cyclones 130, 130 ', 130 " It becomes similar to the conical shape favorable to the development of the air current.

This is because the centrifugal force due to the increase of the ascending airflow is increased as the shape of the cone is closer to that of the conical shape, so that the nano powder having a relatively large particle size can be raised and discharged to the outside.

Accordingly, the nano powder manufacturing apparatus 300 according to the present invention can separate nano powders having similar sizes in each cyclone through the plurality of cyclones 130, 130 ', and 130 ".

For example, the first gas flowing from the first cyclone 130 to the second cyclone 130 'may include nanopowders having a size of 20 to 300 nm, and the third gas may flow from the second cyclone 130' The first gas introduced into the cyclone 130 " may include nano powder having a size of 20-150 nm. The first gas introduced into the third cyclone 130 " The nano powder having a size of 20 to 100 nm can be collected through the filter member 144 in the collecting part 140. [

FIG. 11 shows another embodiment of a nano powder manufacturing apparatus 400 according to the present invention, which classifies nano powders contained in the first base by size.

That is, the plurality of cyclones 230, 230 'and 230' 'are formed of the cyclone shown in FIGS. 6 and 7 and the injection speed of the second gas injected into the body through the gas supply pipe 180 is made different, The centrifugal force of the first gas flowing along the inner wall surface of the first chamber 133 may be different.

Here, the plurality of cyclones 230, 230 ', and 230' 'are all configured identically.

Specifically, by increasing the speed of the second gas injected into the body 133 through the gas supply pipe 180 from the first cyclone 230 to the third cyclone 230 '', the body 133 The centrifugal force generated in the first base body is gradually increased along the inner wall surface of the first base body.

As a result, the size of the nano powder separated from the first gas decreases gradually along the inner wall surface of the body 133 from the first cyclone 230 to the third cyclone 230 ''.

For example, the first gas introduced from the first cyclone 230 to the second cyclone 230 'may include nano powder having a size of 20 to 300 nm, and the third gas may flow from the second cyclone 230' The first gas introduced into the cyclone 230 "may include nano powder having a size of 20-150 nm. The first gas introduced into the third cyclone 230 " The nano powder having a size of 20 to 100 nm can be collected through the filter member 144 in the collecting part 140. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100, 200, 300, 400: Nano powder manufacturing apparatus
110: reaction chamber 120: plasma generator
122: injection tube 122a: nozzle
124 induction tube 126 induction coil
127: Clearance
130, 130 ', 130 ", 230, 230', 230"
131: inlet 132: outlet
133: body 134: guide portion
135: through hole 136: discharge pipe
137: bulge 137a: first part
137b: second portion 137c: opening
138: internal space 140:
142: chamber 144: filter member
150: Powder feeder 160: Pump
170: heat exchanger 180: gas supply pipe
182: Connector H1, H2, H3: separation distance

Claims (23)

A cyclone for a nano powder production apparatus disposed between a reaction chamber and a collecting section,
The cyclone,
A body having an inner space in which a gas introduced through an inlet port descends along an inner wall surface and a nano powder contained in the gas is separated from the gas; And
And a guide portion provided on an inner wall surface of the body to guide the flow direction of the gas so that the gas can be spirally lowered. The method according to claim 1,
Wherein the guide part is provided as a plate-shaped guide plate having a predetermined length and is provided in a spiral shape along the height direction on the inner wall surface of the body. 3. The method of claim 2,
Wherein the guide plate is provided with a through hole having a through hole formed so as to allow the nano powder separated by the centrifugal force to fall from the base downward. The method according to claim 1,
Wherein the body has a gradually decreasing inner diameter from the upper part to the lower part. The method according to claim 1,
And a gas supply pipe for injecting a gas toward the inner space side of the body to increase the velocity of the gas rotating along the inner wall surface of the body. 6. The method of claim 5,
Wherein the gas supply pipe and the body are connected to each other through a plurality of connection pipes so that gas is injected from the gas supply pipe to the inner space side and the plurality of connection pipes are connected to the inner wall surface of the body, And arranged in a direction coinciding with the flow direction. The method according to claim 1,
A hollow tube is disposed on a bottom surface of the body for introducing a gas downward along the inner wall surface of the body to guide the gas upward,
The bulb is disposed such that a lower end of the bulb is in contact with the bottom surface, and an opening for introducing a gas, which is lowered to the bottom surface of the body, into the inside of the bulb tube is formed at a predetermined height Cyclone for nano powder manufacturing equipment. 8. The method of claim 7,
Wherein the bulb includes a first portion having an inner diameter gradually increasing from the lower portion to an upper portion and a second portion having an inner diameter gradually decreasing from the lower portion toward the upper portion and the second portion is disposed at a lower portion of the first portion, Cyclone for manufacturing equipment. A reaction chamber;
A plasma generator coupled to the reaction chamber and generating a plasma to generate a nano powder by vaporizing the supplied raw material;
A cyclone separating a nano powder having a predetermined size or larger from a gas containing nano powder transferred from the plasma generating unit; And
And a collecting unit having at least one filter member and collecting the nano powder from the gas transferred from the cyclone,
The cyclone,
A body having an inner space in which a gas introduced through the inlet from the reaction chamber descends along an inner wall surface and a nano powder contained in the gas is separated from the gas; And
And a guide portion provided on an inner wall surface of the body and guiding a flow direction of the gas so that the gas can be spirally lowered. 10. The method of claim 9,
Wherein the guide portion is provided with a plate-shaped guide plate having a predetermined length and is provided in a spiral shape along the height direction on the inner wall surface of the body. 11. The method of claim 10,
Wherein the guide plate is provided with a through hole formed so as to penetrate through the fluid so that the particles separated by the centrifugal force drop downward. 10. The method of claim 9,
Wherein the body is configured such that the inner diameter gradually decreases from the upper part to the lower part. 10. The method of claim 9,
And a gas supply pipe for injecting a gas toward the inner space side of the body to increase the velocity of the gas rotating along the inner wall surface of the body. 14. The method of claim 13,
Wherein the gas supply pipe and the body are connected to each other through a plurality of connection pipes so that gas is injected from the gas supply pipe to the inner space side and the plurality of connection pipes are connected to the flow direction of the gas including the nano powder along the outer peripheral surface of the body And arranged in a matching direction. 10. The method of claim 9,
Wherein a bottom of the body is provided with a hollow tube for guiding upwardly a gas falling down along the height direction of the inner space from the inlet,
The bulb is disposed such that a lower end of the bulb is in contact with the bottom surface, and an opening for introducing a gas, which is lowered to the bottom surface of the body, into the inside of the bulb tube is formed at a predetermined height Nano powder manufacturing equipment. 16. The method of claim 15,
Wherein the bulb includes a first portion having an inner diameter gradually increasing from the lower portion to an upper portion and a second portion having an inner diameter gradually decreasing from the lower portion toward the upper portion and the second portion is disposed at a lower portion of the first portion, Manufacturing apparatus. 10. The method of claim 9,
Wherein the plurality of cyclones are sequentially connected to each other and the cyclones adjacent to each other are connected to an inlet of a cyclone in which a discharge port of the cyclone arranged at the front side is disposed at the rear side. 18. The method of claim 17,
The plurality of cyclones may include a discharge pipe having a predetermined length connected to the discharge port and protruding toward the inner space. The discharge port of the cyclone from the lower end of the discharge pipe provided in each cyclone toward the rear side along the moving direction of the gas, Wherein the distance to the bottom surface is shortened. 10. The method of claim 9,
The plurality of cyclones are provided such that the inner diameter of each of the plurality of cyclones gradually decreases from the upper portion to the lower portion, and the angle between the bottom surface and the side portion forming the body gradually increases from the front side to the rear side along the moving direction of the base body Powder production equipment. A reaction chamber;
A plasma generator coupled to the reaction chamber and generating a plasma to generate a nano powder by vaporizing the supplied raw material;
A cyclone separating a nano powder having a predetermined size or larger from a gas containing nano powder transferred from the plasma generating unit; And
And a collecting unit having at least one filter member and collecting the nano powder from the gas transferred from the cyclone,
The plurality of cyclones are sequentially connected to each other,
The plurality of cyclones may include a discharge pipe having a predetermined length connected to the discharge port and protruding toward the inner space. The discharge port of the cyclone from the lower end of the discharge pipe provided in each cyclone toward the rear side along the moving direction of the gas, And the distance to the bottom surface is different. 21. The method of claim 20,
Wherein the plurality of cyclones are disposed such that the distance from the lower end of the discharge tube provided in each cyclone to the bottom surface of the body decreases from the front side to the rear side along the moving direction of the gas. A reaction chamber;
A plasma generator coupled to the reaction chamber and generating a plasma to generate a nano powder by vaporizing the supplied raw material;
A cyclone separating a nano powder having a predetermined size or larger from a gas containing nano powder transferred from the plasma generating unit; And
And a collecting unit having at least one filter member and collecting the nano powder from the gas transferred from the cyclone,
The plurality of cyclones are sequentially connected to each other,
Wherein the plurality of cyclones are arranged such that the angle between the bottom surface and the side surface of the body constituting the body becomes different from each other along the moving direction of the base body from the front side to the rear side. 23. The method of claim 22,
The plurality of cyclones are provided such that the inner diameter of each of the plurality of cyclones gradually decreases from the upper portion to the lower portion, and the angle between the bottom surface and the side portion constituting the body gradually increases from the front side to the rear side along the moving direction of the base body Wherein the nanostructured powder is placed on the substrate.

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