Charged particle filtering device

Abstract

A charged particle filtering device according to an embodiment of the present invention includes: an inlet for a fluid positioned in a first direction; and a first porous region and a second porous region positioned side by side in a second direction intersecting the first direction, wherein at least a portion of the first porous region is coated with an ion exchange material, charged particles contained in the fluid move to the second porous region, and the fluid removed of the charged particles moves toward an outlet via the first porous region.

Description

Filter for charged particles

[0001] The present invention relates to a filtering device for charged particles, and more particularly to a filtering device using electrohydraulics.

[0002] Water treatment, including the treatment of water supply and sewage and industrial wastewater or sewage, is considered crucial across a wide range of fields. The substances subject to filtration in the fluids being treated vary in nature, but filtration of charged particles may be required as one such target. Examples of charged particles subject to filtration include plastics and dyes.

[0003] Plastic pollution has become a major environmental issue in recent years, and concerns are growing. With the steady increase in plastic use, annual global plastic production currently stands at approximately 400 million tons, and this figure is projected to reach approximately 800 million tons by 2050. The problem is that plastic does not decompose. Because it takes at least decades or centuries to fully decompose, used plastic continues to accumulate in the ecosystem. Meanwhile, discarded plastic waste breaks down into various smaller fragments through mechanical or chemical processes, with fragments smaller than 5 mm being called microplastics. Due to their chemical stability, microplastics flow into aquatic environments, including rivers and oceans, where they float for long periods of time. Consequently, not only aquatic life, but also humans and animals are inevitably exposed to microplastics, increasing ecological and environmental risks.

[0004] Membrane filtration, which utilizes membrane filters, is used to remove microplastics from these aquatic environments. However, membrane filters pose the problem of membrane fouling. Membrane fouling causes significant flow rate reduction and affects the quality of produced water, ultimately leading to various economic and operational issues. Furthermore, fibrous microplastics, the most prevalent form of microplastics in aquatic environments, penetrate vertically into the small gaps and pores of membrane filters, making it difficult to remove fibrous microplastics using membrane filters.

[0005] Moreover, among various industrial wastewaters, dye wastewater in particular has detrimental effects on public health and the ecosystem. In particular, cationic dyes are highly toxic, easily entering cells and accumulating in the cytoplasm, causing mutations and cancer, and even triggering allergies in living organisms.

[0006] Therefore, there is a need for effective dye removal from this dye wastewater. However, existing dye removal methods primarily rely on chemical methods. Specifically, dyes are removed by adsorbing them using separate chemical reagents. These methods generate byproducts during the dye removal process and can cause additional contamination. Furthermore, the dye removal process requires a membrane regeneration process, making continuous treatment difficult.

[0007] One object of the present invention to solve the above-mentioned problems is to provide a charged particle filtering device that filters charged particles using electrokinetics, and to provide a charged particle filtering device that can filter even substances to be filtered that were difficult to remove in conventional membrane filtration methods and can solve the problem of membrane contamination.

[0008] Another object of the present invention to solve the above-mentioned problems is to provide a charged particle filter device that can achieve high removal efficiency for a substance to be filtered by using electrokinetics for filtration, while enabling a continuous filtration process and being applicable to large-scale facilities.

[0009] However, the problem to be solved by the present invention is not limited to this, and may be expanded in various ways without departing from the spirit and scope of the present invention.

[0010] According to an embodiment of the present invention for achieving the above-described object, a charged particle filtering device comprises a fluid inlet positioned in a first direction, a first porous region and a second porous region positioned in parallel in a second direction intersecting the first direction, and at least a portion of the first porous region is coated with an ion exchange material, and charged particles contained in the fluid move to the second porous region, and fluid from which the charged particles have been removed moves toward an outlet via the first porous region.

[0011] According to one aspect, the first porous region may include pores having a diameter of 1 μm to 1000 μm, and the coated ion exchange material may include pores having a diameter of 1 nm to 1000 nm.

[0012] According to one aspect, the first porous region may comprise a sponge.

[0013] According to one aspect, the ion exchange material may be an anion exchange material.

[0014] According to one aspect, the charged particle filtering device can filter particles charged with positive ions.

[0015] According to one aspect, the ion exchange material may include TMA.

[0016] According to one aspect, the charged particle filter device can filter water containing a cationic dye.

[0017] According to one aspect, the ion exchange material is a cation exchange material, and the charged particle filter device can filter particles charged with anions.

[0018] According to one aspect, it may further include a first electrode arranged corresponding to the first porous region and a second electrode arranged corresponding to the second porous region.

[0019] According to one aspect, the device may further include a first ion exchange membrane positioned between the first electrode and the first porous region.

[0020] According to one aspect, the device may further include a second ion exchange membrane positioned between the second electrode and the second porous region.

[0021] According to one aspect, a voltage of 20 V to 80 V can be applied to the first electrode and the second electrode.

[0022] According to one aspect, the fluid from which the charged particles have been removed can move through the pores included in the first porous region.

[0023] According to one aspect, an ion depletion region can be formed in a region including an interface between the first porous region and the second porous region.

[0024] According to one aspect, the ion depletion region can cause an electrophoretic force to act on the charged particle.

[0025] According to one aspect, the charged particles can be moved by the combined force of the electrophoretic force in the ion depletion region and the drag force due to the flow of the fluid.

[0026] According to one aspect, the second porous region may comprise a sponge.

[0027] According to one aspect, the charged particles accumulated in the second porous region can be removed by washing with water.

[0028] According to one aspect, the first porous region and the second porous region may have hydrophilicity.

[0029] The disclosed technology may have the following effects. However, this does not mean that a particular embodiment must include all or only the following effects, and thus the scope of the disclosed technology should not be construed as being limited thereby.

[0030] According to the charged particle filtering device using electrohydraulics according to one embodiment of the present invention described above, by filtering charged particles using electrokinetics, it is possible to filter even substances to be filtered that were difficult to remove in conventional membrane filtration methods, and has the advantage of solving the membrane contamination problem.

[0031] In addition, by utilizing electrohydraulics for filtration, a high removal efficiency for the target substance can be achieved, while a continuous filtration process is possible and application to large facilities is possible.

[0032] FIG. 1 is a schematic diagram illustrating the structure of a charged particle filter device according to one embodiment of the present invention.

[0033] FIG. 2 illustrates in detail the first porous region and the second porous region of a charged particle filter device according to one embodiment of the present invention.

[0034] Figure 3 shows the second porous region before and after washing.

[0035] Figure 4 shows the UV-visible absorption spectra of the fluid before and after filtration, measured while varying the voltage applied to the charged particle filter device according to the present embodiment.

[0036] Figure 5 shows the UV-visible absorption spectra of the fluid before and after filtration at different filtration speeds.

[0037] Figure 6 shows the results of measuring the filtration rate while varying the voltage applied to the charged particle filter device after fixing the injection speed and filtration speed of the fluid containing charged particles.

[0038] Figure 7 shows the results of measuring the filtration rate while changing the filtration speed after fixing the voltage applied to the charged particle filter device.

[0039] Figure 8 shows the measurement of the filtration rate for methylene blue and methyl green according to voltage of the charged particle filter device according to the present embodiment.

[0040] The present invention can be modified in various ways and has various embodiments, and specific embodiments are illustrated in the drawings and described in detail.

[0041] However, this is not intended to limit the present invention to a specific embodiment, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0042] While terms such as "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a "second component," and similarly, a second component may also be referred to as a "first component." The term "and / or" includes any combination of multiple related items described herein or any item among multiple related items described herein.

[0043] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0044] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0045] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0046] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in more detail. In order to facilitate an overall understanding in describing the present invention, identical reference numerals will be used for identical components in the drawings, and redundant descriptions of identical components will be omitted.

[0047]

[0048] Fig. 1 is a schematic diagram illustrating the structure of a charged particle filter according to one embodiment of the present invention. The charged particle filter according to this embodiment is based on electro-hydraulic control of charged particles based on ion concentration polarization (ICP).

[0049] Referring to FIG. 1, the charged particle filtering device according to the present embodiment includes a first porous region (100) and a second porous region (200) positioned parallel to each other. As illustrated in FIG. 1, the first porous region (100) and the second porous region (200) may be positioned adjacent to each other in a direction parallel to the ground surface. However, this is merely an example, and the first porous region (100) and the second porous region (200) may be positioned in various directions. As illustrated in FIG. 1, the first porous region (100) and the second porous region (200) may be positioned in direct contact with each other. As will be described in detail later, one of the first porous region (100) and the second porous region (200) is coated with a material having ion exchange capacity to separate charged particles from a fluid.

[0050] For this purpose, electrodes corresponding to each of the first porous region (100) and the second porous region (200) may be positioned. As illustrated in FIG. 1, the first electrode (110) may be positioned corresponding to the first porous region (100), and the second electrode (210) may be positioned corresponding to the second porous region (200). The first electrode (110) and the second electrode (210) may be, for example, carbon paper, but are not limited thereto. The first electrode (110) and the second electrode (210) may be in the form of a plate, and may have a structure including a plurality of pores according to an embodiment. In the present embodiment, since fluid can flow through the pores of the first porous region (100) and the second porous region (200), the pores of the first electrode (110) and the second electrode (210) are not essential structures. However, depending on the embodiment, the first electrode (110) and the second electrode (210) may include pores.

[0051] According to one aspect, a first ion exchange membrane may be positioned between the first porous region (100) and the first electrode (110). Additionally, a second ion exchange membrane may be positioned between the second porous region (200) and the second electrode (210). In some embodiments, the second ion exchange membrane may be omitted. The first ion exchange membrane may be positioned in contact with the first porous region (100), and an ion depletion region formed in the first ion exchange membrane by the first porous region (100) may be expanded.

[0052] Different voltages may be applied to the first electrode (110) and the second electrode (210). FIG. 1 illustrates a configuration in which a positive voltage is applied to the first electrode (110) and a negative voltage is applied to the second electrode (210), but this is merely an example and is not limited thereto. That is, the voltages applied to the first electrode (110) and the second electrode (210) may be different when the charged particle filter filters positively charged particles and when the charged particle filter filters negatively charged particles.

[0053] Referring to FIG. 1, the charged particle filtering device according to the present embodiment may include an inlet (300) and an outlet (400). As illustrated in FIG. 1, the inlet (300) and the outlet (400) may be located on opposite sides of the charged particle filtering device. The inlet (300) may be a region into which a fluid including charged particles is injected, and the outlet (400) may be a region into which a filtered fluid is discharged. Referring to FIG. 1, the inlet (300) and the outlet (400) are illustrated side by side in the direction of gravity, and the first porous region (100) and the second porous region (200) are illustrated as being positioned side by side in a direction intersecting the direction of gravity. Accordingly, as the fluid containing charged particles flows from the inlet (300) to the outlet (400), it passes through the first porous region (100) and the second porous region (200), and the filtration of the charged particles can be achieved by the ion exchange material coated on one of the first porous region (100) and the second porous region (200) and the electric field applied to the first porous region (100) and the second porous region (200). In the case of Fig. 1, since the inlet (300) and the outlet (400) are positioned in the direction of gravity, the fluid containing charged particles can pass through the charged particle filtering device without applying a separate pressure. However, a separate pressure may be applied to control the filtration speed of the fluid containing charged particles. In addition, the structure illustrated in FIG. 1 is only an example, and the positions of the first porous region (100) and the second porous region (200), the inlet (300), and the outlet (400) may vary. That is, the first porous region (100) and the second porous region (200) may be positioned side by side in the direction of gravity, and the fluid inlet (300) and outlet (400) may be positioned in a direction intersecting the direction of gravity. In this case, a separate pressurizing device may be required for the injection and flow of the fluid.

[0054] FIG. 1 illustrates enlarged views of a first porous region (100) and a second porous region (200). The first porous region (100) and the second porous region (200) may include a porous material. For example, the porous material may include, but is not limited to, a sponge. The first porous region (100) and the second porous region (200) may use any material having a porous structure without limitation. For example, the porous region may include a melamine sponge. The first porous region (100) and the second porous region (200) may include pores having an average size of 1 μm to 1000 μm. More specifically, the average size of the pores included in the first porous region (100) and the second porous region (200) may be 50 μm to 150 μm.

[0055] The first porous region (100) and the second porous region (200) may have hydrophilicity. Therefore, a fluid including charged particles injected through the injection port (300) may diffuse along the first porous region (100) and the second porous region (200). Since the first porous region (100) and the second porous region (200) have porous structures having hydrophilicity, the fluid may flow along the first porous region (100) and the second porous region (200) without a separate channel or passage for the flow of the fluid.

[0056] The fluid containing the charged particles may be, for example, water containing a dye, and the water containing the dye may be absorbed and diffused into the first porous region (100) and the second porous region (200) and move therethrough.

[0057] In FIG. 1, the first porous region (100) may be an ion exchange region, and the second porous region (200) may be a charged particle concentration region. The first porous region (100) may be coated with a material having ion exchange capacity to separate charged particles from a fluid containing charged particles. In addition, the first porous region (100) may suppress electric convection in the ion depletion region, thereby preventing charged particles transferred to the second porous region (200) from returning to the first porous region (100).

[0058] The material having ion exchange capacity may be a cation exchange material or an anion exchange material. If the charged particle filtering device according to the present embodiment is a device that filters cation charged particles, the first porous region (100) may be coated with an anion exchange material. Conversely, if the charged particle filtering device according to the present embodiment is a device that filters anion charged particles, the first porous region (100) may be coated with a cation exchange material. That is, the polarity of the charged particles to be filtered and the polarity of the particles exchanged by the material coated on the first porous region (100), which is an ion exchange region, are opposite to each other.

[0059] In one embodiment, the charged particle filtering device of the present invention may be a cationic filtering device. More specifically, it may be a device that filters water containing a cationic dye. The cationic dye may be, for example, methyl green or methylene blue, but is not limited thereto.

[0060] Referring to the right side of Fig. 1, the first porous region (100) is coated with an ion exchange material. Referring to the left side of Fig. 1, the second porous region (200) is not coated with an ion exchange material and thus has a high porosity. Although the first porous region (100) of Fig. 1 has a lower porosity than the second porous region (200) due to the coating of the ion exchange material, there is a portion where the ion exchange material is not coated, and thus fluid can be permeated. In addition, as will be described in detail later in Fig. 2, the first porous region (100) coated with the ion exchange material has a multi-scale pore structure including both micro-pores included in the first porous region and nano-pores within the coated ion exchange material. Therefore, ion exchange can be performed while simultaneously permeating the fluid.

[0061] The ion exchange material may be a material containing a TMA (Trimethylamine) functional group. For example, it may be a material in which a polymer is coated with a TMA functional group. However, this is only an example, and the ion exchange material may be at least one selected from any material having ion exchange capacity, such as, for example, DMHA (N,N-dimethylhexylamine) and / or IM (methylimidazole).

[0062] FIG. 2 illustrates in detail the first porous region (100) and the second porous region (200) of the charged particle filter device according to the present embodiment. Referring to FIG. 2, the first porous region (100) is coated with an anion exchange material. At this time, the anion exchange material may be a material including a TMA functional group. The TMA functional group is illustrated in FIG. 2. The TMA functional group is a material having a cation and can exchange anions.

[0063] Referring to FIG. 2, the first porous region (100) and the second porous region (200) include micro-sized pore structures. In the present specification, micro-sized pores mean that the average size of the pores is from 1 μm to 1000 μm. As described above, the average size of the pores may be from 50 μm to 150 μm. Therefore, a fluid can flow through the pores through the first porous region (100) and the second porous region (200).

[0064] Referring to (b) of FIG. 2, the first porous region (100) is coated with an anion exchange material. This anion exchange material includes nano-sized pores therein. In the present specification, nano-sized pores mean that the average size of the pores is 1 nm to 1000 nm. These nano-sized pores cannot pass fluids, but can pass ions. That is, the first porous region (100) can have a multi-scale pore structure including both micro-sized pores and nano-sized pores. Therefore, fluids can move through the micro-sized pores, and ions can move through the nano-sized pores.

[0065] The anion exchange material is TMA as described above. + As such, the cations move to the first porous region (100), and thus the anions move to the first porous region (100). In this process, the charged particles with cations move to the second porous region (200). As shown in Fig. 2, an ion depletion region (500) exists between the first porous region (100) and the second porous region (200). In the present embodiment, the first porous region (100) and the second porous region (200) are in contact with a large area, so the area of ​​the ion depletion region (500) is large, and the filtration of the charged particles can occur effectively.

[0066] This ion depletion region (500) can cause an electrophoretic force to act on the charged particles. Accordingly, the charged particles can move according to the drag force and electrophoretic force according to the flow of the fluid.

[0067] The movement of charged particles in a fluid is governed by Stokes' law because the particle Reynolds number is very low (Rep << 1). For example, when considering spherical ionic charged particles, drag and electrophoretic forces mainly act on the charged particles.

[0068] As shown in Fig. 2, in the ion depletion region (500), the charged particles are applied in the horizontal direction V ep (Electrophoretic force) and the force V applied in the vertical direction drag (drag) force. Therefore, the charged particle experiences a force of V ep Wow V drag The diagonal force (V) is the sum of resulatant ) and can move in the direction as shown by the arrow at the lower left of FIG. 2. As shown in FIG. 2, the charged particle filtering device according to the present embodiment has a large area of ​​the ion depletion region (500) since the first porous region (100) and the second porous region (200) are in contact with each other. Therefore, the filtration of charged particles can occur effectively. In addition, the ion depletion region formed in the first ion exchange membrane by the first porous region (100) can be expanded. According to one aspect, more specifically, but not limited to, the ion depletion region (500) can be formed in a region including the interface of the first porous region (100) and the second porous region (200).

[0069] As described above, both the first porous region (100) and the second porous region (200) include pores, and thus, a fluid (e.g., water) can pass therethrough. The charged particles in the fluid are separated by an electric field applied to the first porous region (100) and the second porous region (200) and an ion exchange material coated on the first porous region (100), and the separated charged particles move to the second porous region (200). Therefore, only pure fluid from which charged particles have been removed remains in the first porous region (100), and the fluid from which charged particles have been removed passes through the first porous region (100) and falls downward. Likewise, the separated charged particles move to the second porous region (200) and are concentrated, and the fluid in which the charged particles are concentrated thus passes through the second porous region (200) and falls downward. Therefore, the charged particles and the fluid can be separated as illustrated in FIG. 2.

[0070] In the charged particle filter device according to the present embodiment, the fluid moves through the first porous region (100) and the second porous region (200), so there is no need to create a separate channel for the permeation of the fluid. That is, the fluid can move along the first porous region (100) and the second porous region (200).

[0071] In addition, since the ion exchange reaction occurs in the ion depletion zones that are continuously positioned as the fluid descends in the direction of gravity, the ion exchange reaction occurs in a wide area, and the filtration performance of charged particles can be improved. Therefore, the concentration of filtered charged particles can increase as you go lower in the second porous region (200). Charged particles that are not filtered in the upper region can also be filtered as they move lower in the first porous region (100). Therefore, the filtration performance can be improved.

[0072] The charged particles filtered and concentrated in the second porous region (200) can be easily removed through washing and reused. Fig. 3 illustrates the second porous region (200) before and after washing. In Fig. 3, the charged particles are blue. Referring to Fig. 3, it can be confirmed that the charged particles are concentrated toward the bottom of the second porous region (200). In addition, it can be confirmed that the charged particles concentrated in the second porous region (200) are removed after washing. The porous region may include a sponge, and since such a sponge does not have a separate charge, the charged particles can be easily removed through a process of washing with water.

[0073] Fig. 4 shows the UV-visible absorption spectra of fluid before and after filtration, measured while varying the voltage applied to the charged particle filter according to the present embodiment. The fluid containing charged particles used in Fig. 4 is water containing methyl green. At this time, methyl green is contained in the water at a concentration of 100 ppm. Referring to Fig. 4, it can be confirmed that the water was blue due to methyl green before filtration, but was transparent after filtration because the methyl green was removed. These results could also be confirmed through the absorption spectrum.

[0074] In addition, Fig. 5 shows the UV-visible absorption spectra of the fluid before and after filtration while varying the filtration speed. The fluid containing the charged particles used in Fig. 5 is water containing methyl green. At this time, methyl green is contained in the water at a concentration of 100 ppm. Referring to Fig. 5, it can be confirmed that the water was blue due to methyl green before filtration, but was transparent after filtration because the methyl green was removed. This result could also be confirmed through the absorption spectrum. As shown in Fig. 5, it could be confirmed that the filtration of the charged particles was performed well even when the filtration speed was changed.

[0075] Fig. 6 shows the results of measuring the filtration rate while varying the voltage applied to the charged particle filter device, with the injection speed of the fluid containing charged particles set to 2 ml / min and the filtration speed fixed at 1 ml / min. Referring to Fig. 6, it was confirmed that the filtration performance improved as the voltage applied under the same conditions increased. However, when the voltage was 60 V or higher, it was confirmed that the filtration performance did not improve further even if the voltage increased.

[0076] Fig. 7 shows the results of measuring the filtration rate while varying the filtration speed after fixing the voltage applied to the charged particle filter at 60 V. Referring to Fig. 7, it was confirmed that the filtration rate decreased as the filtration speed increased. In other words, it was confirmed that the filtration rate relatively decreased when the fluid containing charged particles passed quickly through the charged particle filter.

[0077] Fig. 8 shows the voltage-dependent filtration rates of the charged particle filter according to the present embodiment for methylene blue and methyl green. Each dye was contained in water at a concentration of 100 ppm. Referring to Fig. 8, it was confirmed that both methylene blue and methyl green were effectively filtered at voltages of 20 V to 80 V. In other words, it was confirmed that the charged particle filter according to the present embodiment could effectively filter dyes contained in water.

[0078] Methylene blue and methyl green are cationic dyes, and it was confirmed that the charged particle filter device according to this embodiment can effectively remove cationic dyes from water. However, the present invention is not limited thereto, and if a material having cationic exchange capacity is coated on the first porous region, charged particles having anions can be removed.

[0079] Traditionally, methods like adsorption have been used to remove dyes from water. However, this method requires the use of other chemical solutions to remove the adsorbed dye, resulting in additional wastewater and contamination. Furthermore, since a process for removing the adsorbed dye is required after a certain level of filtration, continuous removal is difficult.

[0080] However, the charged particle filter device according to the present embodiment is simple and environmentally friendly because it removes charged particles (dye) electrically without using chemical methods. In addition, the filtered dye is removed by a simple method of rinsing with water, so a separate filter regeneration process is not required, and continuous processing is possible.

[0081] Conventional methods for removing charged particles have employed methods of forming passages through ion exchange membranes through which fluid can flow. However, in the present embodiment, the first porous region coated with a material having ion exchange capacity functions as a passage for ion movement and a channel through which fluid can pass, resulting in a much simpler structure. Depending on the shape of the first porous region, the device can be modified into various shapes and applied to a large-capacity charged particle removal device. In other words, a charged particle filter device with continuous filtration performance can be manufactured and applied to large-scale facilities.

[0082] In the present embodiment, when the fluid moves in the first direction, the charged particles are separated while moving in the second direction perpendicular to the first direction. Therefore, a continuous ion separation process is possible while flowing the fluid in the first direction. Since ion exchange occurs throughout the first porous region, continuous and effective separation of charged particles is possible. Since the pores of the first porous region and the second porous region act as channels through which the fluid flows, there is no need to provide a separate passage for the flow of the fluid. In addition, the movement path of the fluid can be variously adjusted by changing the shape of the first porous region and the second porous region. In the present embodiment, since the channel through which the fluid flows and the region through which ion exchange occurs are combined into one structure, ion exchange can occur continuously.

[0083] In the preceding examples, a configuration was illustrated in which the fluid flows in the direction of gravity and filtration is performed in a direction perpendicular to the direction of gravity. However, this is merely an example and the present invention is not limited thereto. In other words, the fluid may flow in a direction opposite to gravity or perpendicular to the direction of gravity by a separate pressure, and filtration of charged particles may occur in a direction perpendicular to the direction of fluid flow.

[0084] The filtration rate can be controlled by the flow rate of the fluid. That is, the filtration rate can be increased by applying pressure to the fluid. However, since the flow rate that can be filtered in the first porous region (100) and the second porous region (200) is limited, it is necessary to control the flow rate according to the volume of the first porous region (100) and the second porous region (200). This can be controlled by appropriately adjusting the flow rate of the fluid.

[0085]

[0086] Although the present invention has been described with reference to the drawings and embodiments, it does not mean that the scope of protection of the present invention is limited by the drawings or embodiments, and it will be understood that a person skilled in the art can modify and change the present invention in various ways without departing from the spirit and scope of the present invention as described in the following claims.

[0087] Although the present invention described above is described based on a series of functional blocks, it is not limited to the above-described embodiments and the attached drawings, and it will be apparent to those skilled in the art to which the present invention pertains that various substitutions, modifications, and changes are possible within a scope that does not depart from the technical spirit of the present invention.

[0088] The combination of the above-described embodiments is not limited to the above-described embodiments, and various combinations may be provided in addition to the above-described embodiments depending on implementation and / or needs.

[0089] In the above-described embodiments, the methods are described based on a flowchart as a series of steps or blocks. However, the present invention is not limited to the order of the steps, and some steps may occur in a different order or simultaneously with other steps described above. Furthermore, those skilled in the art will understand that the steps depicted in the flowchart are not exclusive, and other steps may be included, or one or more steps in the flowchart may be deleted without affecting the scope of the present invention.

[0090] The above-described embodiments include examples of various aspects. While not all possible combinations to illustrate the various aspects can be described, those skilled in the art will recognize that other combinations are possible. Accordingly, the present invention is intended to encompass all other alterations, modifications, and variations within the scope of the following claims.

[0091]

[0092] [Explanation of symbols]

[0093] 100: 1st porous region

[0094] 200: Second porous region

[0095] 110: First electrode

[0096] 210: Second electrode

[0097] 500: Ion depletion region

[0098] 300: Inlet

[0099] 400: exhaust port

Claims

1. Fluid inlet located in the first direction; comprising a first porous region and a second porous region positioned parallel to each other in a second direction intersecting the first direction; At least a portion of the first porous region is coated with an ion exchange material, Charged particles contained in the fluid move to the second porous region, The fluid from which the charged particles have been removed moves toward the outlet via the first porous region. Daejeon particle filter device.

2. In paragraph 1, The first porous region comprises pores having a diameter of 1 μm to 1000 μm, The coated ion exchange material comprises pores having a diameter of 1 nm to 1000 nm. Daejeon particle filter device.

3. In paragraph 1, The first porous region comprises a sponge, Daejeon particle filter device.

4. In paragraph 1, The above ion exchange material is an anion exchange material. Daejeon particle filter device.

5. In paragraph 4, The above charged particle filtering device filters particles charged with positive ions. Daejeon particle filter device.

6. In paragraph 1, The above ion exchange material comprises TMA, Daejeon particle filter device.

7. In paragraph 1, The above charged particle filter device filters water containing cationic dye, Daejeon particle filter device.

8. In paragraph 1, The above ion exchange material is a cation exchange material, The above charged particle filtering device filters particles charged with negative ions. Daejeon particle filter device.

9. In paragraph 1, a first electrode arranged corresponding to the first porous region; and A second electrode disposed corresponding to the second porous region; further comprising: Daejeon particle filter device.

10. In paragraph 9, Further comprising a first ion exchange membrane positioned between the first electrode and the first porous region; Daejeon particle filter device.

11. In paragraph 9, Further comprising a second ion exchange membrane positioned between the second electrode and the second porous region; Daejeon particle filter device.

12. In paragraph 1, A voltage of 20 V to 80 V is applied to the first electrode and the second electrode, Daejeon particle filter device.

13. In paragraph 1, The fluid from which the charged particles have been removed moves through the pores included in the first porous region. Daejeon particle filter device.

14. In paragraph 1, An ion depletion region is formed in a region including an interface between the first porous region and the second porous region. Daejeon particle filter device.

15. In paragraph 14, The above ion depletion region is, To cause an electrophoretic force to act on the charged particles, Daejeon particle filter device.

16. In paragraph 14, The charged particles are moved by the combined force of the electrophoretic force of the ion depletion region and the drag force according to the flow of the fluid. Daejeon particle filter device.

17. In paragraph 1, The second porous region comprises a sponge, Daejeon particle filter device.

18. In paragraph 17, The charged particles accumulated in the second porous region are removed by water washing. Daejeon particle filter device.

19. In paragraph 1, The first porous region and the second porous region have hydrophilicity, Daejeon particle filter device.

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