Ion Removal Device

Abstract

The ion removal device includes a container, a first electrode that adsorbs ions in a liquid, a first electrode holder that holds the first electrode, a first electrode guide having a first electrode guide inlet through which the liquid flows into the first electrode holder, a second electrode that adsorbs ions in the liquid, a second electrode holder that holds the second electrode, and a second electrode guide having a second electrode guide outlet through which the liquid flows out of the second electrode holder, and a separator that is liquid-permeable and electrically insulating and is disposed between the first and second electrodes. Inside the container, the first electrode guide, separator, and second electrode guide are arranged so that the liquid to be treated passes through the first electrode guide, separator, and second electrode guide in that order.

Description

Technical Field

[0001] The present disclosure relates to an ion removal device.

Background Art

[0002] Conventionally, an ion removal device that performs desalination treatment on a liquid such as water to remove ionic substances has been known. For example, Patent Document 1 discloses a deionization device using the principle of an electric double layer capacitor. This electric double layer capacitor has a configuration in which a gasket that houses electrodes on both sides of a separator is arranged with a spacer interposed between two separators to secure a flow path, and a side plate that houses a current collector electrode is attached outside this electrode. The liquid inlet and outlet for the treatment are formed so as to communicate from the outside of the side plate to the inner spacer. The liquid that has flowed into the capacitor from the inlet is deionized in the process of passing through the flow path formed by the spacer and flows out of the capacitor from the outlet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the deionization device disclosed in Patent Document 1, among the liquid passing through the spacer, untreated water that passes only through the spacer without contacting the electrode may occur, which may lead to a decrease in ion removal performance.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide an ion removal device capable of improving ion removal performance by suppressing untreated water that does not contact the electrode.

Means for Solving the Problems

[0006] The ion removal apparatus according to this disclosure is an ion removal apparatus that performs desalination treatment on a liquid, comprising: a container section; a first electrode that adsorbs ions in the liquid; a first electrode holding section that holds the first electrode; and a first electrode guide having a first electrode guide inlet for allowing the liquid to flow into the first electrode holding section; a second electrode that adsorbs ions in the liquid; a second electrode holding section that holds the second electrode; and a second electrode guide having a second electrode guide outlet for allowing the liquid to flow out from the second electrode holding section; and a separator having permeability to allow liquid to pass through and electrical insulation properties, and disposed between the first electrode and the second electrode, wherein inside the container section, the liquid to be treated flows through the first electrode guide, The first electrode held in the first electrode holding portion, The separator, The second electrode held in the second electrode holding portion, The first electrode guide, the separator, and the second electrode guide are arranged so that they pass through the second electrode guide in that order. [Effects of the Invention]

[0007] According to this disclosure, the first electrode guide, separator, and second electrode guide are arranged inside the container so that the liquid to be treated passes through them in the order of first electrode guide, separator, and second electrode guide. This suppresses the amount of water to be treated that does not come into contact with the electrodes, thereby improving ion removal performance. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing an ion removal device according to Embodiment 1, disassembled. [Figure 2] This is a longitudinal cross-sectional view showing the ion removal device according to Embodiment 1. [Figure 3] This is a perspective view showing the lid of the ion removal device according to Embodiment 1, as seen from below. [Figure 4] This is a longitudinal cross-sectional view showing the ion removal device according to Embodiment 2. [Figure 5] This is a cross-sectional view showing the first electrode guide of the ion removal device according to Embodiment 2. [Figure 6] This is a cross-sectional view showing the second electrode guide of the ion removal device according to Embodiment 2. [Figure 7] This is a plan view showing the third current collector of the ion removal device according to Embodiment 2. [Modes for carrying out the invention]

[0009] The ion removal apparatus according to the embodiment will be described below with reference to the drawings. In the following drawings, parts with the same reference numerals are the same or equivalent and are common to the entire text of the embodiment described below. Also, the size relationships of each component in the drawings may differ from those of the actual components. Furthermore, the forms of the components shown in the entire specification are merely examples and are not limited to the forms described in the specification. It may not be necessary to include all the equipment described in the specification. In particular, the combinations of components are not limited to the combinations in each embodiment, and components described in other embodiments can be applied to other embodiments.Hereafter, "water," which is the liquid that the apparatus processes, will be referred to without distinction as raw water before treatment in the ion removal process, water treated in the ion removal process, or regenerated wastewater in which the ion concentration has increased due to treatment in the ion desorption process after ion removal.

[0010] Embodiment 1. Figure 1 is a perspective view showing an exploded ion removal device 100 according to Embodiment 1. Figure 2 is a longitudinal cross-sectional view showing the ion removal device 100 according to Embodiment 1. Figure 3 is a perspective view showing the lid 7 of the ion removal device 100 according to Embodiment 1 as seen from below.

[0011] The ion removal device 100 according to this embodiment performs a desalination treatment on liquids such as water. As shown in Figures 1 and 2, the ion removal device 100 comprises a container section 1, a first current collector 20, a first electrode guide 3, a first electrode 40, a separator 5, a second electrode guide 6, a second electrode 41, a second current collector 21, a lid 7, a pressing section 8, a first terminal section 90, and a second terminal section 91. Inside the container section 1, the first current collector 20, the first electrode guide 3, the separator 5, the second electrode guide 6, and the second current collector 21 are stacked in order from the bottom, and the lid 7 is placed on top of the container section 1. The pressing section 8 is placed between the second current collector 21 and the lid 7. The ion removal device 100 removes dissolved ions in water by adsorbing ions onto the first electrode 40 held by the first electrode guide 3 and the second electrode 41 held by the second electrode guide 6.

[0012] The container section 1 is a bottomed cylindrical shape with an opening on one end face. A lid 7 is attached to the opening of the container section 1. The cylindrical surface of the container section 1 is provided with a container section inlet 10 for allowing liquid to flow into the container section 1 from the outside, and a container section outlet 11 for allowing liquid to flow out from the inside of the container section 1 to the outside. The container section inlet 10 is located at the bottom of the cylindrical surface. The container section outlet 11 is located at the top of the cylindrical surface. As an example, the container section inlet 10 and the container section outlet 11 are located at positions facing each other in the radial direction when viewed in plan on the container section 1. The container section 1 can be made of any material as long as it is cylindrical. In addition, as shown in Figure 2, a first threaded portion 12 for attaching the lid 7 is formed on the outer circumferential surface of the upper end of the container section 1.

[0013] The first current collector 20 is disc-shaped and contacts the first electrode 40. The first terminal portion 90 is connected to an external power source (not shown) outside the container portion 1 and to the first current collector 20 inside the container portion 1. In other words, the first current collector 20 is connected to an external power source (not shown) via the first terminal portion 90 and is supplied with electricity from the first terminal portion 90. In the ion removal process performed by the ion removal device 100, the first current collector 20 supplies charge by sending electricity to the first electrode 40 held by the first electrode guide 3. Also, in the ion desorption process performed by the ion removal device 100, the first current collector 20 collects electricity when the first electrode 40 discharges.

[0014] The materials used to constitute the first current collector 20 include, for example, graphite sheets, graphoil, conductive rubber, or metal sheets and plates sandwiched or covered with these materials. Thus, the first current collector 20 is formed from a conductive and flexible material. The first terminal portion 90 only needs to be directly or indirectly connected to the first current collector 20, and a plate or wire made of a conductive material may be placed between it and the first current collector 20. The first terminal portion 90 is positioned such that a portion is located outside the container portion 1 or lid 7, and the other portion is located inside the container portion 1 or lid 7. In the case shown in Figure 2, the first terminal portion 90 is provided penetrating the bottom surface of the container portion 1. The ion removal device 100 uses the first terminal portion 90 to apply electricity to the first electrode 40 and to discharge electricity from the first electrode 40.

[0015] The first electrode guide 3 is cylindrical in shape. The first electrode guide 3 comprises a first electrode holding portion 30b and a first electrode guide inlet 30a. The first electrode holding portion 30b is the part enclosed by the inner circumferential surface of the cylinder, where the first electrode 40 is positioned. The first electrode guide inlet 30a is formed by penetrating the cylindrical surface and is an opening that serves as a flow path for liquid to flow into the first electrode holding portion 30b. The first electrode guide inlet 30a may be provided with an outflow prevention member to prevent the first electrode 40 positioned in the first electrode holding portion 30b from flowing out. The outflow prevention member is a member formed from an insulating resin net, a sponge filter, an insulating coated metal mesh, a nonwoven fabric, filter paper, etc. The first electrode guide 3 only needs to be able to be positioned inside the cylindrical container portion 1, and the shape of the outer edge and inner edge of the first electrode guide 3 may differ. The material of the first electrode guide 3 is an insulating material, such as resin or rubber. A sealant such as a packing or O-ring may be installed between the first current collector 20, separator 5, and second electrode guide 6, which are installed adjacent to the first electrode guide 3. In this case, a groove or the like for installing the sealant may be machined into the first electrode guide 3.

[0016] The separator 5 is disc-shaped. The separator 5 prevents short circuits between the first electrode 40, which is held by the first electrode guide 3, and the second electrode 41, which is held by the second electrode guide 6. The materials that make up the separator 5 include, for example, filter paper, filters, porous films, nonwoven fabrics, and foaming agents. These materials are permeable to liquids without allowing them to pass through conductive materials, and are also electrically insulating.

[0017] The second electrode guide 6 has a cylindrical shape. The second electrode guide 6 includes a second electrode holding portion 60b and a second electrode guide outlet 60a. The second electrode holding portion 60b is a portion surrounded by the inner peripheral surface of the cylinder, and the second electrode 41 is disposed therein. The second electrode guide outlet 60a is an opening formed by penetrating the cylindrical surface and serves as a flow path for allowing the liquid to flow out from the second electrode holding portion 60b. An outflow prevention member for preventing the outflow of the second electrode 41 disposed in the second electrode holding portion 60b may be provided at the second electrode guide outlet 60a. The outflow prevention member is a member formed of an insulating resin net, a sponge filter, a metal net coated with an insulating coating, a non-woven fabric, filter paper, or the like. The second electrode guide 6 may be disposed inside the cylindrical container portion 1 in the same manner as the first electrode guide 3, and the shapes of the outer edge portion and the inner edge portion of the second electrode guide 6 may be different. The material of the second electrode guide 6 is an insulating material, such as resin or rubber. A sealing material such as a packing or an O-ring may be provided between the second current collector 21, the separator 5, and the first electrode guide 3 that are installed adjacent to the second electrode guide 6. In this case, a groove or the like for installing the sealing material may be processed in the second electrode guide 6.

[0018] The second current collector 21 has a disk shape and contacts the second electrode 41. The second terminal portion 91 is connected to an external power source (not shown) outside the container portion 1 and is connected to the second current collector 21 inside the container portion 1. That is, the second current collector 21 is connected to an external power source (not shown) via the second terminal portion 9, and electricity is supplied from the second terminal portion 91. The second current collector 21 supplies electricity to the second electrode 41 held by the second electrode guide 6 to supply charges in the ion removal step performed by the ion removal device 100. Further, the second current collector 21 collects electricity when discharging from the second electrode 41 in the ion desorption step performed by the ion removal device 100.

[0019] As materials for forming the second current collector 21, for example, graphite sheets, graphite foils, conductive rubbers, or metal sheets and plates sandwiched or coated with these materials are used. Thus, the second current collector 21 is formed of a conductive and flexible material. The second terminal portion 91 only needs to be directly or indirectly connected to the second current collector 21, and a plate or a conducting wire made of a conductive material may be disposed between the second current collector 21 and the second terminal portion 91. A part of the second terminal portion 91 is disposed outside the container portion 1 or the lid 7, and the other part is disposed inside the container portion 1 or the lid 7. In the case shown in FIG. 2, the second terminal portion 91 is provided to penetrate through the lid 7 and the pressing portion 8. The ion removal device 100 realizes the application of electricity to the second electrode 41 and the discharge from the second electrode 41 through the second terminal portion 91.

[0020] The first electrode 40 and the second electrode 41 receive charge supply by the power supplied from the power source in the ion removal process to adsorb ions in water, and release the adsorbed ions in the ion desorption process. Here, the first electrode 40 is charged positively or negatively by the charge supply. On the other hand, the second electrode 41 is charged with the opposite polarity to the first electrode 40. The electrode charged with the positive polarity adsorbs anions. Also, the ions charged with the negative polarity adsorb cations. That is, the first electrode 40 and the second electrode 41 adsorb ions with the polarity opposite to the polarity of the electrode. For example, in order to increase the capacitance as a capacitor, the first electrode 40 and the second electrode 41 are made of a conductive material such as activated carbon, porous carbon, porous conductive beads, porous metal, etc., which are conductive and have a large specific surface area. The shape of the conductive material includes powder, granule, fiber, etc. When the conductive material is in powder or granule form, the outer diameter of the conductive material is 100 nm to 10 mm. Also, when the conductive material is in fiber form, the thickness of the conductive material is 1 μm to 50 μm. Also, in some cases, cloth or filters formed using these conductive materials are used as the first electrode 40 and the second electrode 41.

[0021] The lid 7 has a concave shape and is attached to the upper end of the container portion 1 to close the opening of the container portion 1. As shown in Figures 2 and 3, a second threaded portion 70 is formed on the inner circumferential surface of the lid 7, which connects with the first threaded portion 12 of the container portion 1. As shown in Figure 2, the lid 7 is attached to the container portion 1 by fitting the upper part of the container portion 1 into the concave part and screwing the second threaded portion 70 into the first threaded portion 12. A sealing material such as a packing or O-ring may be installed between the lid 7 and the container portion 1. In this case, a groove or the like for installing the sealing material may be formed in the lid 7 or the container portion 1.

[0022] Furthermore, the lid 7 is provided with a pressing portion 8 that protrudes from the inner bottom surface of the recess toward the inside of the container portion 1 and is fitted into the inside of the container portion 1 from the upper end. For example, the pressing portion 8 is formed integrally with the lid 7. By forming the pressing portion 8 integrally with the lid 7, the assembly of the ion removal device 100 is made easier. However, the pressing portion 8 may also be configured as a separate component from the lid 7. The pressing portion 8, by connecting the lid 7 and the container portion 1, presses the first electrode 40 and the second electrode 41 housed inside the container portion 1. As a result, the contact area and contact points between the first electrode 40 and the first current collector 20, and between the second electrode 41 and the second current collector 21 are increased, and the electrical resistance of the ion removal device 100 is reduced, thereby improving the ion removal efficiency of the ion removal device 100. Furthermore, when powdered, granular, or fibrous conductive materials are used for the first electrode 40 and the second electrode 41, the contact area and contact points between the constituent members of the first electrode 40 and the second electrode 41 increase, and the electrical resistance of the first electrode 40 and the second electrode 41 decreases, thereby improving the ion removal efficiency. A sealing material such as a packing or O-ring may be installed between the pressing part 8 and the second current collector 21. In this case, a groove or the like for installing the sealing material may be formed in the pressing part 8 or the second current collector 21. The sealing material should be installed in a position that does not interfere with the contact between the second terminal part 91 and the second current collector 21. Also, if the pressing part 8 and the lid 7 are not integrated, a sealing material such as a packing or O-ring may be installed between the pressing part 8 and the lid 7. In this case, a groove or the like for installing the sealing material may be formed in the pressing part 8 or the lid 7.

[0023] The ion removal device 100 is configured such that the lid 7 is attached to the container section 1, and the pressing section 8 presses against the components inside the container section 1, so that the positions of the container section inlet 10 and the first electrode guide inlet 30a, and the positions of the container section outlet 11 and the second electrode guide outlet 60a coincide. As a result, the liquid flow path of the ion removal device 100 is formed by the container section 1, the first electrode guide 3, the first electrode 40, the separator 5, the second electrode 41, and the second electrode guide 6. The liquid flows in from the container section inlet 10, passes through the first electrode guide inlet 30a, and flows into the first electrode 40. The liquid that reaches the first electrode 40 passes through the separator 5 and reaches the second electrode 41. The liquid that reaches the second electrode 41 passes through the second electrode guide outlet 60a and the container section outlet 11 and flows out of the container section 1. This ensures that the liquid comes into contact with both electrodes, preventing a decrease in the ion removal performance of the ion removal device 100.

[0024] As described above, the ion removal devices 100 and 200 according to this embodiment include a container section 1 that forms an outer shell, a first electrode 40 that adsorbs ions in a liquid, a first electrode guide 3 having a first electrode holding section 30b that holds the first electrode 40 and a first electrode guide inlet 30a through which the liquid flows into the first electrode holding section 30b, a second electrode 41 that adsorbs ions in a liquid, a second electrode guide 6 having a second electrode holding section 60b that holds the second electrode 41 and a second electrode guide outlet 60a through which the liquid flows out of the second electrode holding section 60b, and a separator 5 disposed between the first electrode 40 and the second electrode 41. Inside the container section 1, the first electrode guide 3, the separator 5, and the second electrode guide 6 are arranged so that the liquid to be processed passes through in the order of the first electrode guide 3, the separator 5, and the second electrode guide 6.

[0025] In other words, according to the ion removal device 100 of this embodiment 1, the liquid to be processed passes through the first electrode 40, the separator 5, and the second electrode 41 in that order within the ion removal device 100, so that the liquid passing through the inside of the container section 1 can be brought into contact with the first electrode 40 and the second electrode 41. This improves the ion removal performance of the ion removal device 100. Furthermore, since the container section 1 is cylindrical, when the lid 7 is installed and the components inside the container section 1 are pressed by the pressing section 8, deformation such as deflection of the lid 7 and the container section 1 can be suppressed. In addition, by providing a second threaded section 70 on the lid 7 and a first threaded section 12 on the container section 1, and screwing the second threaded section 70 into the first threaded section 12, the container section 1 and the lid 7 can be joined and the inside of the container section 1 can be pressed by the pressing section 8, making assembly easy.

[0026] In the ion removal device 100 according to this embodiment 1, the pressing part 8 is positioned between the lid 7 and the second current collector 21, but the pressing part 8 may also be positioned between the first current collector 20 and the container part 1. In this case, the first terminal part 90 may be positioned to penetrate the pressing part 8. Also, a sealing material such as a packing or O-ring may be installed between the pressing part 8 and the container part 1. In this case, a groove or the like may be machined into the pressing part 8 or the container part 1 for installing the sealing material. Also, a sealing material such as a packing or O-ring may be installed between the pressing part 8 and the first current collector 20. In this case, a groove or the like may be machined into the pressing part 8 or the first current collector 20 for installing the sealing material. When installing a sealing material, the sealing material should be installed in a position that does not interfere with contact between the first terminal part 90 and the first current collector 20.

[0027] In the ion removal device 100 according to this embodiment 1, the container section 1 is positioned such that the container section inlet 10 and the container section outlet 11 are facing each other in the radial direction when viewed in plan. However, the container section inlet 10 and the container section outlet 11 may be positioned at different locations and not facing each other in the radial direction. Furthermore, in the ion removal device 100 according to this embodiment 1, the container section inlet 10 and the container section outlet 11 are shown as being located on the side surface of the container section 1. However, they may also be located on the bottom surface of the container section 1 or on the lid 7, which is the surface facing the lid 7. When the container section inlet 10 or the container section outlet 11 is located on the bottom surface of the container section 1 or on the lid 7, it is necessary to provide holes in the first current collector 20 and the second current collector 21 to allow liquid to pass through. When holes are provided in the first current collector 20 and the second current collector 21 to allow liquid to pass through, an outflow prevention member may be provided to prevent the outflow of the first electrode 40 and the second electrode 41. Furthermore, if the container inlet 10 or container outlet 11 is provided on the bottom or lid 7 of the container 1, and holes for liquid to pass through are provided in the first current collector 20 and the second current collector 21, the first terminal portion 90 and the second terminal portion 91 are positioned at different locations. In this embodiment 1, the first terminal portion 90 and the second terminal portion 91 are located on the bottom surface and lid 7 of the container 1, but they may also be located on the side of the container 1 or elsewhere. In this case, sealing material or the like may be appropriately placed to prevent water leakage from between the first terminal portion 90 and the second terminal portion 91 and the portion through which they pass.

[0028] Embodiment 2. Next, the ion removal device 200 according to Embodiment 2 will be described with reference to Figures 4 to 7. Figure 4 is a longitudinal cross-sectional view showing the ion removal device 200 according to Embodiment 2. Figure 5 is a transverse cross-sectional view showing the first electrode guides 30 and 31 of the ion removal device 200 according to Embodiment 2. Figure 6 is a transverse cross-sectional view showing the second electrode guides 60 and 61 of the ion removal device 200 according to Embodiment 2. Figure 7 is a plan view showing the third current collector 22 of the ion removal device 200 according to Embodiment 2. Note that components identical to those of the ion removal device 100 described in Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0029] As shown in Figure 4, the ion removal device 200 according to this second embodiment has a configuration in which one electrode layer A1 and A2 is made up of a first electrode 40, a first electrode guide 3, a second electrode 41, a second electrode guide 6, and a separator 5, and the two electrode layers A1 and A2 are stacked inside the container 1. A third current collector 22 is positioned between the vertically adjacent electrode layers A1 and A2.

[0030] In other words, in the ion removal device 200 according to this second embodiment, as shown in Figure 4, the container section 1 is configured with the following components stacked in that order: first current collector 20, first electrode guide 30, first separator 50, second electrode guide 60, third current collector 22, first electrode guide 31, second separator 51, second electrode guide 61, and second current collector 21. The portion located between the first current collector 20 and the third current collector 22 is the first electrode layer A1, and the portion located between the third current collector 22 and the second current collector 21 is the second electrode layer A2. The first electrode guide 30 and the first electrode guide 31 have the same configuration. Similarly, the second electrode guide 60 and the second electrode guide 61 have the same configuration. For the sake of explanation, the reference numerals are changed to distinguish between the lower-positioned first electrode guide 30 and the second electrode guide 60 from the upper-positioned first electrode guide 31 and the second electrode guide 61.

[0031] The first electrode guide 30 is cylindrical in shape, as shown in Figures 4 and 5. The first electrode guide 30 comprises a first electrode guide inlet 30a, a first electrode holding portion 30b, a first electrode guide inflow channel groove 30c, and a first electrode guide inflow channel groove 30d. The first electrode guide inlet 30a is an opening formed by penetrating the cylindrical surface and serves as a flow path for liquid to flow in. The first electrode holding portion 30b is the portion enclosed by the inner circumferential surface of the cylinder, where the first electrode 40 is positioned. The first electrode guide inflow channel groove 30c is a groove formed by recessing a part of the outer surface of the first electrode guide 30 along the axis of the hole. The first electrode guide inflow channel groove 30c is formed from the upper end surface to the lower end surface of the first electrode guide 30. The first electrode guide inflow channel groove 30c partially or completely penetrates the first electrode guide inlet 30a and forms an inflow channel 13 leading to the first electrode 40. In other words, the liquid flowing into the first electrode guide inlet groove 30c passes through the first electrode guide inlet 30a and flows into the first electrode 40. The first electrode guide groove 30d is a groove formed by recessing a part of the outer surface of the first electrode guide 30 along the hole axis direction. The first electrode guide groove 30d is formed from the upper end surface to the lower end surface of the first electrode guide 30. The first electrode guide groove 30d is provided at a different position from the first electrode guide inlet groove 30c. The first electrode guide groove 30d is connected to the second electrode guide outlet groove 60c to form the outlet channel 14a. As shown in Figure 5, the first electrode guide groove 30d may be provided at a position opposite to the first electrode guide inlet groove 30c in the radial direction when viewing the first electrode guide 30 in plan, or it may be provided at other locations.

[0032] The first electrode guide 31 includes a first electrode guide inlet 31a, a first electrode holding portion 31b, a groove 31c for the first electrode guide inflow channel, and a groove 31d for the first electrode guide channel. Since each component of the first electrode guide 31 is the same as the corresponding component of the first electrode guide 30, a description of them is omitted.

[0033] The groove 30c for the first electrode guide inlet is provided between the first current collector 20 and the first separator 50. The groove 31c for the first electrode guide inlet is provided between the third current collector 22 and the second separator 51. The groove 30d for the first electrode guide inlet is provided between the first current collector 20 and the first separator 50. The groove 31d for the first electrode guide inlet is provided between the third current collector 22 and the second separator 51.

[0034] The second electrode guide 60 is cylindrical in shape, as shown in Figures 4 and 6. The second electrode guide 60 comprises a second electrode guide outlet 60a, a second electrode holding portion 60b, a second electrode guide outflow channel groove 60c, and a second electrode guide channel groove 60d. The second electrode guide outlet 60a is an opening formed by penetrating the cylindrical surface and serves as a flow path for liquid to flow out. The second electrode holding portion 60b is the portion enclosed by the inner circumferential surface of the cylinder, where the second electrode 41 is positioned. The second electrode guide outflow channel groove 60c is a groove formed by recessing a part of the outer surface of the second electrode guide 60 along the axial direction of the hole. The second electrode guide outflow channel groove 60c is formed from the upper end surface to the lower end surface of the second electrode guide 60. The second electrode guide outflow channel groove 60c partially or completely penetrates the second electrode guide outlet 60a and forms an outflow channel 14a leading to the second electrode 41. In other words, the liquid flowing from the first separator 50 flows into the second electrode 41 located in the second electrode holding section 60b and flows out from the second electrode guide outlet 60a. The second electrode guide water channel groove 60d is a groove formed by recessing a part of the outer surface of the second electrode guide 60 along the hole axis direction. The second electrode guide water channel groove 60d is formed from the upper end surface to the lower end surface of the second electrode guide 60. The second electrode guide water channel groove 60d is provided at a different position from the second electrode guide outflow water channel groove 60c. The second electrode guide water channel groove 60d is connected to the first electrode guide inflow water channel groove 30c to form the inflow water channel 13a. As shown in Figure 6, the second electrode guide water channel groove 60d may be provided at a position opposite to the second electrode guide outflow water channel groove 60c in the radial direction when viewing the second electrode guide 60 in plan, or it may be provided at other locations.

[0035] The second electrode guide 61 includes a second electrode guide outlet 61a, a second electrode holding portion 61b, a groove 61c for the second electrode guide outflow channel, and a groove 61d for the second electrode guide channel. Since each component of the second electrode guide 61 is the same as the corresponding component of the second electrode guide 61, a description of each component is omitted.

[0036] The second electrode guide outflow channel groove 60c is provided between the first separator 50 and the third current collector 22. The second electrode guide outflow channel groove 61c is provided between the second separator 51 and the second current collector 21. The second electrode guide channel groove 60d is provided between the first separator 50 and the third current collector 22. The second electrode guide channel groove 61d is provided between the second separator 51 and the second current collector 21.

[0037] As shown in Figure 4, the third current collector 22 is installed between the lower second electrode guide 60 and the upper first electrode guide 31, and contacts the first electrode 40 and the second electrode 41. As shown in Figure 7, the third current collector 22 has an inlet channel 22a and an outlet channel 22b. The inlet channel 22a is formed at a position that coincides with the groove 60d for the second electrode guide channel and the groove 31c for the first electrode guide inlet channel, and connects the inlet channel 13a of one electrode layer A1 to the inlet channel 13b of the other electrode layer A2. The outlet channel 22b is formed at a position that coincides with the groove 60c for the second electrode guide outlet channel and the groove 31d for the first electrode guide channel, and connects the outlet channel 14a of one electrode layer A1 to the outlet channel 14b of the other electrode layer A2.

[0038] In the ion removal device 200 according to this second embodiment, the positions of the grooves 30c and 31c for the first electrode guide inlet water channel and the positions of the grooves 60d and 61d for the second electrode guide water channel are arranged to coincide. As a result, the groove 30c for the first electrode guide inlet water channel, the groove 60d for the second electrode guide water channel, the inlet side water channel 22a, the groove 31c for the first electrode guide inlet water channel, and the groove 61d for the second electrode guide water channel coincide, and a liquid inlet water channel 13 is formed inside the container section 1, in which the inlet water channel 13a of electrode layer A1 and the inlet water channel 13b of electrode layer A2 are connected.

[0039] Furthermore, in the ion removal device 200 according to this second embodiment, the positions of the grooves 30d and 31d for the first electrode guide water channel coincide with the positions of the grooves 60c and 61c for the second electrode guide outflow water channel. As a result, the groove 30d for the first electrode guide water channel, the groove 60c for the second electrode guide outflow water channel, the outflow side water channel 22b, the groove 31d for the first electrode guide water channel, and the groove 61c for the second electrode guide outflow water channel coincide, and a liquid outflow water channel 14 is formed inside the container section 1, in which the outflow water channel 14a of electrode layer A1 and the outflow water channel 14b of electrode layer A2 are in communication.

[0040] Next, the liquid flow in the ion removal device 200 according to this second embodiment will be described. In the ion removal device 200 according to this second embodiment, the liquid flow path is formed by the container section 1, the first current collector 20, the first electrode guide 30, the first electrode 40, the first separator 50, the second electrode 41, the second electrode guide 60, the third current collector 22, the first electrode guide 31, the first electrode 40, the second separator 51, the second electrode 41, the second electrode guide 61, and the second current collector 21. The liquid flows in from the container section inlet 10 and reaches the inflow channel 13. After that, it passes through the first electrode guide inlets 30a and 31a and flows into the first electrode 40, respectively. The liquid that has passed through the first electrode guide inlet 30a and flowed into the first electrode 40 passes through the first separator 50 and flows into the second electrode 41, and is discharged to the outside from the container section outlet 11 via the outflow channel 14 from the second electrode guide outlet 60a. The liquid that flows into the first electrode 40 after passing through the first electrode guide inlet 31a passes through the second separator 51 and flows into the second electrode 41, and is discharged to the outside from the container outlet 11 via the outflow channel 14 through the second electrode guide outlet 61a.

[0041] As described above, according to the ion removal device 200 of this second embodiment, the liquid to be processed passes through the container section 1 in the order of the first electrode 40 held by the first electrode guide 30, the first separator 50, and the second electrode 41 held by the second electrode guide 60. Alternatively, the liquid to be processed passes through the container section 1 in the order of the first electrode 40 held by the first electrode guide 31, the second separator 51, and the second electrode 41 held by the second electrode guide 61. In the ion removal device 200, the liquid can be brought into contact with the first electrode 40 and the second electrode 41 in the first and second layers. As a result, when the ion removal device 200 has multiple first electrodes 40 and second electrodes 41, the liquid can be brought into contact with all electrodes, thereby improving the ion removal performance.

[0042] In this embodiment 2, the electrode layers A1 and A2 are not limited to two layers, but may be three or more. If there are n electrode layers A1 and A2, they are stacked in the following order from the bottom of the container 1: [first current collector 20], [first electrode guide 30 / first separator 50 / second electrode guide 60 / third current collector 22], ..., (n-1) [first electrode guide 30 / first separator 50 / second electrode guide 60] [second current collector 21]. The first electrode 40 is placed on the first electrode guide 30, and the second electrode 41 is placed on the second electrode guide 60.

[0043] Although the ion removal devices 100 and 200 have been described above based on the embodiments, the configurations are not limited to those of the embodiments described above. The configurations of the ion removal devices 100 and 200 described above are examples, and other components may be included, or some components may be omitted. In short, the ion removal devices 100 and 200 include design changes and variations in application that are normally performed by those skilled in the art, without departing from the technical concept. [Explanation of symbols]

[0044] 1 Container section, 3 First electrode guide, 5 Separator, 6 Second electrode guide, 7 Lid, 8 Pressing section, 10 Container section inlet, 11 Container section outlet, 12 First threaded section, 13, 13a, 13b Inflow channel, 14, 14a, 14b Outflow channel, 20 First current collector, 21 Second current collector, 22 Third current collector, 22a Inflow channel, 22b Outflow channel, 30, 31 First electrode guide, 30a, 31a First electrode guide inlet, 30b, 31b First electrode holding section, 30c, 31c Groove for first electrode guide inflow channel, 30d, 31d Groove for first electrode guide channel, 40 First electrode, 41 Second electrode, 50 First separator, 51 Second separator, 60, 61 Second electrode guide, 60a, 61a Second electrode guide outlet, 60b, 61b Second electrode holding part, 60c, 61c Groove for second electrode guide outflow channel, 60d, 61d Groove for second electrode guide channel, 70 Second threaded part, 90 First terminal part, 91 Second terminal part, 100, 200 Ion removal device, A1, A2 Electrode layer.

Claims

1. An ion removal device for performing a desalination process on a liquid, A container portion; A first electrode that adsorbs ions in the liquid; a first electrode guide including a first electrode holder for holding the first electrode and a first electrode guide inlet for allowing the liquid to flow into the first electrode holder; a second electrode that adsorbs ions in the liquid; a second electrode guide having a second electrode holder for holding the second electrode and a second electrode guide outlet for causing the liquid to flow out from the second electrode holder; a separator having liquid permeability and electrical insulation, the separator being disposed between the first electrode and the second electrode; An ion removal device in which the first electrode guide, the separator, and the second electrode guide are arranged inside the container portion so that the liquid to be treated passes through the first electrode guide, the first electrode held in the first electrode holding portion, the separator, the second electrode held in the second electrode holding portion, and the second electrode guide in that order.

2. The container portion is a cylindrical portion having a bottom and an opening on one end surface, A lid that closes the opening of the container; and The ion removal device according to claim 1 , further comprising a pressing portion that presses the first electrode and the second electrode together by attaching the lid to the container portion.

3. The ion removal device according to claim 2 , wherein the pressing portion is integrally formed with the lid.

4. a first current collector in contact with the first electrode; a second current collector in contact with the second electrode; a first terminal portion connected to the first current collector and supplying electricity to the first current collector; The ion removal device according to any one of claims 1 to 3, further comprising: a second terminal portion connected to the second current collector and supplying electricity to the second current collector.

5. A first electrode guide inlet channel groove is formed on an outer surface of the first electrode guide, the first electrode guide inlet channel groove being connected to the first electrode guide inlet; a second electrode guide outlet channel groove is formed on the outer surface of the second electrode guide, the second electrode guide outlet channel groove being connected to the second electrode guide outlet; the first electrode guide inflow channel groove and the first electrode guide inlet constitute an inflow channel through which liquid flows into the first electrode; 4. The ion removal device according to claim 1, wherein the second electrode guide outflow channel groove and the second electrode guide outlet port form an outflow channel through which liquid flows out from the second electrode.

6. a first electrode guide water channel groove is formed on an outer surface of the first electrode guide at a position different from the first electrode guide inlet water channel groove; a second electrode guide water channel groove is formed on an outer surface of the second electrode guide at a position different from the second electrode guide outflow water channel groove; the first electrode guide water channel groove is connected to the second electrode guide outflow water channel groove to form the outflow water channel; The ion removal device according to claim 5 , wherein the second electrode guide water channel groove is connected to the first electrode guide inflow water channel groove to form the inflow water channel.

7. the container has a container inlet through which the liquid flows in, and a container outlet through which the liquid that has flowed in from the container inlet flows out to an outside of the container, The container inlet is provided at a position coinciding with the inlet water channel, The ion removal device according to claim 5 , wherein the container outlet is provided at a position coinciding with the outflow water channel.

8. the container has a container inlet through which the liquid flows in, and a container outlet through which the liquid that has flowed in from the container inlet flows out to an outside of the container, the container inlet is provided at a position coinciding with the first electrode guide inlet, 4. The ion removal device according to claim 1, wherein the container outlet is provided at a position coinciding with the second electrode guide outlet.

9. a configuration including the first electrode, the first electrode guide, the second electrode, the second electrode guide, and the separator is defined as one electrode layer, a plurality of the electrode layers are stacked inside the container portion, and a third current collector is disposed between adjacent electrode layers, The ion removal device described in claim 5, wherein the third collector has an inlet side water channel that connects the inlet water channel of one of the electrode layers to the inlet water channel of the other of the electrode layers, and an outlet side water channel that connects the outlet water channel of one of the electrode layers to the outlet water channel of the other of the electrode layers.

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