WO2023182824A1 - 유전분체의 선별장치 - Google Patents
유전분체의 선별장치 Download PDFInfo
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- WO2023182824A1 WO2023182824A1 PCT/KR2023/003850 KR2023003850W WO2023182824A1 WO 2023182824 A1 WO2023182824 A1 WO 2023182824A1 KR 2023003850 W KR2023003850 W KR 2023003850W WO 2023182824 A1 WO2023182824 A1 WO 2023182824A1
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- dielectric powder
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- 239000002245 particle Substances 0.000 title claims abstract description 48
- 230000005684 electric field Effects 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims description 200
- 238000000926 separation method Methods 0.000 claims description 27
- 239000000758 substrate Substances 0.000 claims description 21
- 239000003989 dielectric material Substances 0.000 claims description 18
- 238000012216 screening Methods 0.000 claims description 5
- 238000004720 dielectrophoresis Methods 0.000 claims description 3
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 12
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- 229910052734 helium Inorganic materials 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
- B03C3/383—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames using radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
Definitions
- the present invention relates to a screening device for dielectric powder that can be easily sorted by particle size, weight, density, dielectric constant, or surface area.
- Sorting of powders is widely used in industries such as paints, pigments, inks, and polishing.
- powder sorting can be done by using differences in the size of gravity, centrifugal force, or inertial force that act depending on the size and mass of the powder.
- powders can be classified according to the direction of action and flow direction of an externally applied force. For example, when a downward flow of powder is induced in a chamber from top to bottom, if an air flow is applied in the middle in a direction perpendicular to this, heavy powder subjected to a large gravitational force will sink, and the heavy powder subjected to a small gravitational force will sink. Light powders that receive force can be moved to another space and classified according to the air flow.
- the present invention provides a device that can easily sort powder in a short time using an alternating current electric field.
- the purpose of the present invention is to provide a dielectric powder sorting device that can easily sort mixed dielectric powder by particle size, type, and shape by using charged dielectric powder to flow with the force of q ⁇ E in an alternating current electric field. It is provided.
- 1 is a diagram showing the structure of the dielectric powder sorting device of the present invention.
- the dielectric powder sorting device (A) for the purpose of the present invention includes a chamber, a lower electrode within the chamber, an upper electrode disposed at the upper end and spaced apart from the lower electrode within the chamber, and the upper electrode within the chamber.
- An alternating current power source is applied to the first separation layer, which is located between the electrode and the bottom electrode and does not completely cover the top electrode and the bottom electrode, and the bottom electrode and the top electrode, so that alternating current is generated between the bottom electrode and the top electrode. It includes power application means for applying an electric field, and positions dielectric powder between the lower electrode and the first separation layer.
- the present invention when an alternating current electric field is applied, a higher electric field is applied to the inside of the dielectric powder layer than to the outside, and gas discharge can occur more easily to charge the dielectric powder particles.
- Charged dielectric particles may have the force to flow upward in an electric field within the chamber and can easily rise within the chamber. At this time, the upward flow force may be applied differently depending on the size, density, shape, etc. of the dielectric powder. Therefore, the composition of the dielectric powder accumulated on the first separation layer and the bottom electrode after applying an alternating current electric field may be different.
- the present invention is characterized by selecting dielectric particles using these differences.
- the present invention can easily select dielectric powders by particle size, weight, density, dielectric constant, or surface area through a sorting device.
- a detailed description will be made with reference to Figures 2 to 15 and examples below.
- the characteristics of plasma generation inside the fluid powder layer and outside the fluid powder layer can be controlled under given voltage conditions depending on the gas supplied or supplied into the chamber when an alternating electric field is applied.
- the gas supplied or provided into the chamber may be air.
- gas that does not contain oxygen can be used.
- the type of gas supplied or supplied into the chamber when an alternating electric field is applied is not particularly limited.
- dielectric powder refers to an insulating powder that can be polarized positively on one side and negatively on the other side depending on the direction of the electric field in an electric field, and in the charging step described below (e.g., plasma through application of an electric field) It may be a material that exhibits a net charge by storing excess charge in the form of electrons (-) or holes (+) on the surface due to the application of , photoelectric effect due to ultraviolet irradiation, etc.). In one embodiment, the dielectric powder may be a charged dielectric powder.
- charged dielectric material can have a net charge on the surface (excess charge stored in the material in addition to the offset amount of positive-negative polarization charge), so it has the power to escape from the powder layer more easily and flow upward.
- the dielectric powder may have a size ranging from several nanometers to several thousand micrometers.
- a charging step of additionally charging the dielectric powder may be performed within the chamber.
- the charging step can be performed by applying an electric field for dielectrophoresis to the dielectric powder, irradiating UV light, or generating plasma.
- the charging step includes filling the chamber with a first gas, applying a voltage to generate plasma in the dielectric powder, and then filling the chamber with a second gas, and filling the chamber with a second gas.
- the charging step can be performed by filling the chamber with helium, applying a voltage to generate plasma within the dielectric material, and then filling it with air or SF6, which has a higher discharge start voltage than helium. there is.
- the upper and lower electrodes may operate alternately as a power electrode and a ground electrode.
- the top electrode when the bottom electrode is a power electrode, the top electrode can be a ground electrode, and when the bottom electrode is a ground electrode, the top electrode can be a power electrode.
- the dielectric powder sorting device (B) for the purpose of the present invention is located between the upper electrode and the lower electrode in the chamber, has a height different from the first separation layer, and does not completely cover the upper electrode and the lower electrode. It is characterized in that it additionally includes a second separation layer.
- the dielectric powder sorting device (B) When an alternating current electric field is applied to the dielectric powder sorting device (B), the dielectric powder has different upward flow forces depending on each size, density, surface area, etc. and is separated on the first separation layer and the second separation layer according to the selection criteria. Each can be stacked.
- the first separation layer and the second separation layer may be a dielectric.
- the distance between the first separation layer and the second separation layer, and the distance between the second separation layer and the top electrode can be easily adjusted by the user. If the distance between the bottom electrode and the first and second separation layers is too long, there is a problem of having to apply a higher voltage than necessary.
- the distance between the first and second separation layers from the bottom electrode may be less than about 40 mm. .
- the dielectric powder sorting device (A, B) of the present invention may further include a dielectric substrate laminated on the lower electrode.
- a dielectric substrate laminated on the lower electrode When high voltage is applied between the top and bottom electrodes without a dielectric substrate, arc and spark discharges occur, making it difficult to apply the desired high electric field. Also, charged particles flow only through arc and spark discharges, giving a net charge to the powder particles. Since there is a problem that this cannot be done, preferably, the dielectric powder sorting device of the present invention may be additionally provided with a dielectric substrate stacked on the lower electrode.
- the dielectric powder sorting device (C) for the purpose of the present invention includes a chamber, a lower electrode within the chamber, and a chamber disposed between the upper and lower electrodes of the main body of the chamber so that the chamber can be divided into an upper space and a lower space.
- an upper electrode it includes an upper electrode that does not completely cover the lower electrode, and power application means for applying alternating current power to the lower electrode and the upper electrode so that an alternating electric field is applied between the lower electrode and the upper electrode; , the dielectric powder is located between the lower electrode and the upper electrode.
- the configuration of the dielectric powder sorting device (C) is substantially the same as the configuration of the dielectric powder sorting devices (A and B) described above with reference to FIG. 1, redundant detailed descriptions thereof will be omitted, and the following The explanation focuses on the differences.
- the dielectric powder accumulated on the top electrode is no longer exposed to the electric field and does not flow, so it can be sorted according to the standard, and is placed on the lower side of the top electrode. In the case of struck powder, it spreads and evenly distributes while repeating rise and fall due to the alternating current electric field and eventually accumulates on the upper electrode, making sorting possible.
- the frequency of the applied voltage is about a few hundred Hz, so the powder repeats the rise and fall hundreds of times per second, and the dielectric powder according to the selection criteria is piled on the upper electrode within a few seconds, making it easy to collect the dielectric powder in a short time. You can select.
- the upper space formed in the chamber by the upper electrode can be any space that has a distance that allows powder to flow.
- the dielectric powder sorting device (C) includes a first dielectric substrate arranged to be spaced upwardly from the upper electrode to form a space through which the powder can flow, and a first dielectric substrate stacked on the lower electrode. 2 A dielectric substrate may be additionally provided. The first dielectric substrate prevents rising powder from passing the upper electrode and completely leaving the sorting device, and has the effect of isolating any gas in the sorting device from external air.
- a dielectric substrate disposed on the upper part of the chamber and the lower electrode, such as the sorting devices (A and B), may be additionally provided.
- the dielectric powder flows upward and hits the top of the chamber and falls, it does not matter much in the present invention as long as it falls and falls on the first separation layer, the second separation layer and the top electrode provided as a means of fertilization.
- the supply, selection, and recovery of the dielectric powder can be performed using means such as gas flow, mechanical vibration, and paddle.
- the present invention by controlling the voltage and frequency in consideration of the characteristics of each dielectric powder particle, it is possible to select mixed dielectric powder by particle size, weight, density, dielectric constant, or surface area within seconds to minutes. there is.
- 1 is a diagram showing the structure of the dielectric powder sorting device of the present invention.
- Figure 2 is a diagram showing the principle of flow of dielectric powder through the dielectric powder sorting device of the present invention.
- Figure 3 is a diagram for explaining the alternating current electric field applied through the dielectric powder sorting device of the present invention.
- Figure 4 is a diagram for explaining the behavior of dielectric powder starting to flow in the dielectric powder sorting device of the present invention.
- Figure 5 is a diagram for explaining the behavior of dielectric powder particles in an alternating current electric field in the dielectric powder sorting device of the present invention.
- Figure 6 is a diagram for explaining the flow modes FF, TM, and LF of the dielectric powder in the dielectric powder sorting device of the present invention.
- Figure 7 is an image showing the flow modes FF, TM, and LF of powder at high alternating voltage through the dielectric powder sorting device of the present invention.
- Figure 8 is a diagram showing the dielectric powder sorting device used in Examples 1 to 3 of the present invention.
- Figure 9 shows an image of the dielectric powder used in Example 1 of the present invention.
- Figure 10 shows an image of the dielectric powder selected through Example 1 of the present invention.
- Figure 11 shows an image of the dielectric powder used in Example 2 of the present invention.
- Figures 12 and 13 show images of dielectric powder selected through Example 2 of the present invention.
- Figures 14 and 15 show images of the dielectric powder selected through Example 3 of the present invention.
- Figure 2 is a diagram showing the principle of flow of dielectric powder through the dielectric powder sorting device of the present invention.
- the attraction between particles (F d ) is proportional to the electric field (E p ) applied within the dielectric powder layer and the dielectric constant ( ⁇ ) of the dielectric powder (F d ⁇ Ep, ⁇ ).
- the electric field (E g ) in the gas space above the dielectric powder layer and the electric field (E p ) applied within the dielectric powder layer can be determined by the size of the voltage applied from the outside and the shape of the formed electrode,
- the present invention can easily select dielectric powder by controlling the force applied to the dielectric powder by adjusting the magnitude of the voltage using a dielectric material sorting device.
- factors that determine the flow of dielectric powder include frequency and the amount of charge (q) accumulated on the surface of the dielectric powder.
- the amount of charge (q) accumulated on the surface of the dielectric powder is the biggest factor that determines the flow characteristics of the dielectric powder.
- the amount of charge (q) is most significantly affected by the surface area of the dielectric powder (particle size and shape of the powder) and density/dielectric constant (type of powder), and can also be affected by the type of surrounding gas. If dielectric powder is light in weight and has a large surface area, it can flow very quickly in response to an external electric field. If it is heavy in weight and has a small surface area, it can flow slowly in response to an external electric field.
- the difference in charge of the dielectric powder can be used to select by particle size, shape, density, and dielectric constant.
- Figure 3 is a diagram for explaining the voltage applied through the dielectric powder sorting device of the present invention.
- the voltage applied to the dielectric material sorting device of the present invention may be an alternating high voltage selected from a sine wave, a square wave, a pulse wave, a triangle wave, and a sawtooth wave.
- the voltage may be a square wave (right angle wave).
- Square wave voltage has a right-angled waveform, and the state in which the waveform changes once and returns to its initial state can be defined as one cycle.
- the time required to complete one cycle can be defined as the period (T), and the number of cycles included in one second can be defined as the frequency (f).
- the applied voltage (V m ) is the sum of the voltage drop in the gas space (V g ), the voltage drop in the dielectric powder layer (V p ), and the voltage drop in the dielectric substrate (V d ).
- V m V g + V p + 2V d ).
- the voltage drop in the gas space (V g ) and the voltage drop in the dielectric powder layer (V p ) affect the electric field in the gas space (E g ) and the electric field applied within the dielectric powder layer (E p ), respectively. Since each electric field affects the upward flow of the dielectric material, when a high voltage is applied, the upward flow distance of the dielectric material may increase.
- Figure 4 is a diagram for explaining the behavior of dielectric powder that has started flowing in the dielectric powder sorting device of the present invention.
- the electric field inside the dielectric powder layer is higher than the outside of the dielectric powder layer (i.e., meaning a gas space in which the dielectric powder can flow upward). This can be approved.
- the dielectric powder particles are provided with an amount of charge (q) on the surface, and the electrostatic force (F c ) that enables upward flow increases.
- Dielectric powder particles separated from the dielectric powder layer by high electrostatic force (F c ) are affected only by electrostatic force (F c ) and gravity (F g ) excluding the attraction between dielectric particles (F d ), and the dielectric powder particles are affected only by electrostatic force (F c ) and gravity (F g ).
- the force (F net ) that causes the dielectric powder separated from the layer to flow upward can be expressed as Equation 1 below.
- the acceleration (a) when the dielectric powder particles rise in an electric field can be derived through the force (F net ) that causes the dielectric powder separated from the dielectric powder layer to flow upward.
- d g is defined as the distance between the top of the dielectric layer and the bottom of the dielectric substrate, that is, the maximum distance that the dielectric powder can move within the chamber, through acceleration (a) and spatial distance (d g ),
- T g The time for which the dielectric powder moves the spatial distance (d g ) can be derived through Equation 2 of .
- the dielectric material when the time (T g ) for the dielectric material to move the spatial distance (d g ) is less than T/2, which is the half cycle of the voltage, the dielectric material hits the bottom of the dielectric substrate during the half cycle T/2 and returns to the dielectric material layer. falls in the direction
- T/2 which is the half cycle of the voltage
- Figure 5 is a diagram for explaining the behavior of dielectric powder particles in an alternating current electric field in the dielectric powder sorting device of the present invention. (T/2 ⁇ t g )
- T g the time for the dielectric material to move the spatial distance (d g )
- T/2 the half cycle of the voltage
- the dielectric material that has started to flow accelerates up to a distance of d during the half cycle of the voltage (0 ⁇ T/2), and then when the polarity is reversed, it accelerates for another half cycle of the voltage (T/2 ⁇ ).
- T it decelerates and increases by the distance d'.
- Figure 6 is a diagram for explaining the flow modes FF, TM, and LF of the dielectric powder in the dielectric powder sorting device of the present invention.
- the present invention can have three flow modes of FF, TM, and LF using a dielectric powder sorting device.
- d + d' may increase as the externally applied voltage and the surface area of the dielectric powder particles increase, and d + d' may decrease as the frequency of the externally applied voltage, the density of the powder particles, and the increase in dielectric constant. Therefore, in the dielectric powder sorting device of the present invention, filtering means such as appropriate first and second separators are provided at positions corresponding to d g and the size of d + d' is adjusted by controlling the size and frequency of the external applied voltage. , you can easily select dielectric powder.
- Figure 7 is an image showing the flow modes FF, TM, and LF of powder at high alternating voltage through the dielectric powder sorting device of the present invention.
- FIG. 7 it shows images of FF, TM and LF modes performed through the dielectric powder sorting device of the present invention.
- FF mode most of the dielectric material flows upward from the lower electrode to the upper electrode
- TM mode it flows upward from the lower electrode to a slightly lower distance than the upper electrode compared to the FF mode.
- LF mode the upward flow distance of the dielectric powder is very low.
- the dielectric powder sorting device of the present invention will be described in more detail through specific examples and comparative examples.
- the embodiments of the present invention are only some embodiments of the present invention, and the scope of the present invention is not limited to the following examples.
- Figure 8 is a diagram showing the dielectric powder sorting device used in Examples 1 to 3 of the present invention.
- the dielectric powder sorting device includes a bottom electrode, an alumina substrate having a thickness of about 1 mm on the bottom electrode, and a top electrode (GND) disposed between the top of the main body of the chamber and the alumina substrate. It has a structure. The experiment was performed by placing the dielectric powder on an alumina substrate and the top electrode.
- Example Voltage (kVpp) frequency (Hz) Example 1 (A100+A10 mixed powder) 20 200, 300
- Example 2 (A100+AB100 mixed powder) 20 100 ⁇ 500
- Example 3 (A100-AB100 mixed powder) 14 ⁇ 24 200 * Voltage application means: high voltage amplifier and function voltage generator * Voltage: square wave alternating current (right angle wave) * Voltage range: 14 ⁇ 24 kVpp (Peak th Peak voltage) * Voltage frequency range: 100 ⁇ 500 Hz * Discharge gas: air
- Example 1 of the present invention used alumina ceramic powder for abrasives with different particle sizes. Specifically, a mixed powder of alumina ceramic (A100) with a size of 100 ⁇ m and alumina ceramic (A10) with a size of 10 ⁇ m was mixed. Using this method, the frequency was changed to 200 and 300 Hz at a voltage of 20 kVpp to select the dielectric powder by particle size.
- A100 alumina ceramic
- A10 alumina ceramic
- Figure 9 shows an image of the dielectric powder used in Example 1 of the present invention.
- Example 1 of the present invention contains A100 and A10 evenly mixed.
- Figure 10 shows an image of the dielectric powder selected through Example 1 of the present invention.
- the time for powder particles to flow upward or downward is shorter as the frequency increases.
- a voltage of the same magnitude was applied, even relatively immobile particles (small, heavy, A100) could reach the separation layer when a low frequency (200 Hz) was applied, but at a high frequency (300 Hz). ) was applied, only relatively mobile particles (high surface area to weight, light, A10) could reach the separation layer and be separated.
- Example 2 Dielectric powder separation according to frequency size
- Example 2 of the present invention uses a mixed powder of alumina ceramic (A100) with a size of 100 ⁇ m and alumina balls (AB100) with a size of 100 ⁇ m, and the frequency is changed from 100 to 500 Hz at a voltage of 20 kVpp. Then, selection of the genetic material was performed.
- A100 alumina ceramic
- AB100 alumina balls
- Figure 11 shows an image of the dielectric powder used in Example 2 of the present invention.
- the mixed powder used in Example 2 of the present invention is an even mixture of A100 and AB100, and that AB100 is a generally spherical powder, but has a large variation in particle size.
- Figures 12 and 13 show images of dielectric powder selected through Example 2 of the present invention.
- Example 3 of the present invention used the same mixed powder as that used in Example 2, and selected dielectric powder by changing the voltage in the range of 14 to 24 kVpp in 2 kVpp increments at a frequency of 200 Hz.
- Figures 14 and 15 show images of the dielectric powder selected through Example 3 of the present invention.
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Abstract
Description
실시예 |
전압
(kVpp) |
주파수
(Hz) |
실시예1
(A100+A10 혼합분체) |
20 | 200, 300 |
실시예2
(A100+AB100 혼합분체) |
20 | 100 ~ 500 |
실시예 3
(A100-AB100 혼합분체) |
14~24 | 200 |
* 전압인가수단: 고전압증폭기 및 함수 전압 발생기 * 전압: 구형파 교류(직각파) * 전압 범위: 14 ~ 24 kVpp (Peak th Peak 전압) * 전압주파수 범위: 100~500 Hz * 방전기체: 공기 |
Claims (17)
- 챔버;상기 챔버 내의 하단 전극;상기 챔버 내의 상기 하단 전극과 이격되어 상단에 배치되는 상단 전극;상기 챔버 내의 상기 상단 전극과 상기 하단 전극 사이에 위치하고, 상기 상단 전극과 상기 하단 전극을 전부 덮지 않는 제1 분리층; 및상기 하단 전극과 상기 상단 전극에 교류 전원을 인가하여, 상기 하단 전극과 상기 상단 전극 사이에 교류의 전기장이 인가되도록 하는 전원인가수단;을 포함하고,유전분체는 상기 하단 전극과 상기 제1 분리층 사이에 위치하는,유전분체의 선별장치.
- 제1항에 있어서,상기 유전분체는 하전된 유전분체임을 특징으로 하는,유전분체의 선별장치.
- 제1항에 있어서,상기 교류의 전기장 발생 전에, 추가적으로 상기 유전분체를 하전시키는 하전 단계를 수행하는 것을 포함하는,유전분체의 선별장치.
- 제3항에 있어서,상기 하전 단계는, 상기 유전분체에 유전영동을 위한 전기장의 인가, UV의 조사 또는 플라즈마의 발생을 포함하는,유전분체의 선별장치.
- 제3항에 있어서,상기 하전 단계는,상기 챔버를 제1 기체로 채운 후 전압을 인가하여, 유전분체 내에 플라즈마가 발생되도록 하고, 이후 상기 챔버를 제2 기체로 채우는 것을 포함하며,상기 제1 기체는 상기 제2 기체보다 방전개시전압이 낮은 기체인,유전분체의 선별장치.
- 제1항에 있어서,상기 유전분체는, 입경별, 무게별, 밀도별, 유전율별 또는 표면적별로 선별함을 특징으로 하는,유전분체의 선별장치.
- 제6항에 있어서,상기 선별 기준에 따라, 상기 전압의 크기와 상기 교류 주파수를 제어함을 특징으로 하는,유전분체의 선별장치.
- 제1항에 있어서,상기 챔버 내의 상기 상단 전극과 상기 하단 전극 사이에 위치하고, 상기 제1 분리층과 다른 높이의, 상기 상단 전극과 상기 하단 전극을 전부 덮지 않는 제2 분리층을 추가로 포함하는,유전분체의 선별장치.
- 제1항에 있어서,상기 유전분체의 선별장치는,상기 하단 전극 상에 적층되는 유전체 기판을 추가로 구비하는 것을 특징으로 하는,유전분체의 선별장치.
- 챔버;상기 챔버 내의 하단 전극;상기 챔버가 상부 공간과 하부 공간으로 구분될 수 있도록 상기 챔버의 본체의 상단과 상기 하단 전극 사이에 배치되는 상단 전극으로서, 상기 하단 전극을 전부 덮지 않는 상단 전극; 및상기 하단 전극과 상기 상단 전극에 교류 전원을 인가하여, 상기 하단 전극과 상기 상단 전극 사이에 교류의 전기장이 인가되도록 하는 전원인가수단;을 포함하고,유전분체는 상기 하단 전극과 상기 상단 전극 사이에 위치하는,유전분체의 선별장치.
- 제10항에 있어서,상기 유전분체는 하전된 유전분체임을 특징으로 하는,유전분체의 선별장치.
- 제10항에 있어서,상기 교류의 전기장 발생 전에, 추가적으로 상기 유전분체를 하전시키는 하전 단계를 수행하는 것을 포함하는,유전분체의 선별장치.
- 제12항에 있어서,상기 하전 단계는, 상기 유전분체에 유전영동을 위한 전기장의 인가, UV의 조사 또는 플라즈마의 발생을 포함하는,유전분체의 선별장치.
- 제12항에 있어서,상기 하전 단계는,상기 챔버를 제1 기체로 채운 후 전압을 인가하여, 유전분체 내에 플라즈마가 발생되도록 하고, 이후 상기 챔버를 제2 기체로 채우는 것을 포함하며,상기 제1 기체는 상기 제2 기체보다 방전개시전압이 낮은 기체인,유전분체의 선별장치.
- 제10항에 있어서,상기 유전분체는, 입경별, 무게별, 밀도별, 유전율별 또는 표면적별로 선별함을 특징으로 하는,유전분체의 선별장치.
- 제15항에 있어서,상기 선별 기준에 따라, 상기 전압의 크기와 상기 교류 주파수를 제어함을 특징으로 하는,유전분체의 선별장치.
- 제10항에 있어서,상기 유전분체의 선별장치는,상기 상단 전극과 상부 방향으로 이격되어 상기 챔버의 상단부에 배치되는 유전체 기판을 추가로 구비하는 것을 특징으로 하는,유전분체의 선별장치.
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US4874507A (en) * | 1986-06-06 | 1989-10-17 | Whitlock David R | Separating constituents of a mixture of particles |
JPH0724361A (ja) * | 1993-07-15 | 1995-01-27 | Seiji Baba | 粉体の静電分離分級装置 |
US5454472A (en) * | 1991-08-19 | 1995-10-03 | Fraunhofer Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Method of continuously separating mixtures of microscopic dielectric particles and apparatus for carrying through this method |
KR100247532B1 (ko) * | 1993-02-16 | 2000-05-01 | 히가시 데쓰로 | 플라즈마 처리장치 |
JP2007117873A (ja) * | 2005-10-27 | 2007-05-17 | Nippon Steel Corp | 静電分離方法および静電分離装置 |
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US4874507A (en) * | 1986-06-06 | 1989-10-17 | Whitlock David R | Separating constituents of a mixture of particles |
US5454472A (en) * | 1991-08-19 | 1995-10-03 | Fraunhofer Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Method of continuously separating mixtures of microscopic dielectric particles and apparatus for carrying through this method |
KR100247532B1 (ko) * | 1993-02-16 | 2000-05-01 | 히가시 데쓰로 | 플라즈마 처리장치 |
JPH0724361A (ja) * | 1993-07-15 | 1995-01-27 | Seiji Baba | 粉体の静電分離分級装置 |
JP2007117873A (ja) * | 2005-10-27 | 2007-05-17 | Nippon Steel Corp | 静電分離方法および静電分離装置 |
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