Capacitive deionization apparatus

Abstract

A capacitive deionization apparatus is disclosed. In the capacitive deionization device, an electrode module comprises: a first channel gasket in which a first high-concentration channel is separated from a first low-concentration channel; a second channel gasket in which a second high-concentration channel is separated from a second low-concentration channel; and an electrode gasket, wherein the first high-concentration channel can overlap the second high-concentration channel and the first low-concentration channel can overlap the second low-concentration channel. Therefore, the high-concentration channel and the low-concentration channel are separated in the electrode module, such that cross-flow and / or parallel flow of a fluid can be implemented in a unit stack and / or between unit stacks, current is uniformly distributed throughout the entire region of the flow channels and, simultaneously, an ion transfer effect between an electrode and the fluid and the ion adsorption capacity of the electrode can be maximized.

Description

Capacitive deionization device

[0001] The present invention relates to a deionization device, and more particularly to a capacitive deionization device.

[0002] Ion exchange using ion exchange resins is currently the most widely used method for removing ionic substances from aqueous solutions. While this method effectively separates most ionic substances, it suffers from the drawback of generating large amounts of wastewater containing acids, bases, or salts during the regeneration process of the ion-exchanged resin. Furthermore, membrane separation technologies such as reverse osmosis and electrodialysis are being applied, but these technologies face challenges such as reduced treatment efficiency due to membrane fouling, cleaning of contaminated membranes, and the need for periodic membrane replacement.

[0003] Capacitive deionization (CDI) technology, which utilizes the principle of an electric double layer, is being studied as a solution to the problems of these existing deionization technologies. The capacitive deionization device used in this technology includes a positive electrode to which positive current is applied, a negative electrode to which negative current is applied, and a spacer provided between the positive and negative electrodes to allow the flow of treated water.

[0004] Since these capacitive deionization devices perform adsorption and desorption simply by changing the electrode potential, they have the advantage of being simple to operate and environmentally friendly as they do not emit secondary pollutants during operation.

[0005] However, since conventional capacitive deionization devices are configured to flow in a so-called co-flow form in which the fluid flows in a certain direction within a unit stack and / or between multiple unit stacks, the deionization efficiency may be reduced as the current is concentrated on the upstream electrode of the flow within the channel.

[0006] In addition, conventional capacitive deionization devices may have limited applications because it is difficult to change the flow pattern within a unit stack and / or between multiple unit stacks.

[0007] The purpose of the present invention is to provide a capacitive deionization device capable of increasing electrochemical deionization efficiency.

[0008] Another object of the present invention is to provide a capacitive deionization device capable of increasing electrochemical deionization efficiency by ensuring that the current is evenly distributed across the entire channel area.

[0009] Another object of the present invention is to provide a capacitive deionization device in which the flow between adjacent stacks is formed in opposite directions so that the current is evenly distributed across the entire channel area.

[0010] Another object of the present invention is to provide a capacitive deionization device capable of changing the flow pattern within a unit stack and / or between multiple unit stacks.

[0011] In order to achieve the object of the present invention, a capacitive deionization device may be provided, including a case having one inlet formed at one longitudinal end and one outlet formed at the other longitudinal end; and an electrode module provided inside the case and capable of removing ionic substances in raw water moving from the inlet to the outlet. The electrode module may include a first channel gasket, a second channel gasket, and an electrode gasket. The first channel gasket may be provided with a first high-concentration channel and a first low-concentration channel separated from each other, the second channel gasket may be provided with a second high-concentration channel and a second low-concentration channel separated from each other, and the electrode gasket may be laminated on at least one channel gasket among the first channel gasket and the second channel gasket. The first high-concentration channel may overlap the second high-concentration channel in the longitudinal direction of the case, and the first low-concentration channel may overlap the second low-concentration channel in the longitudinal direction of the case. Through this, the current is evenly distributed across the entire area of ​​the flow channel, and the contact area between the electrode and the fluid is expanded, thereby maximizing the ion transfer effect and the ion adsorption capacity of the electrode, thereby increasing the deionization efficiency.

[0012] For example, the first channel gasket may be formed such that a first reaction space is penetrated through the center thereof, the first high-concentration channel may be formed in an uneven manner along the inner surface of the first reaction space, and the first low-concentration channel may be formed between the first high-concentration channels and spaced apart from the inner surface of the first reaction space. The second channel gasket may be formed such that a second reaction space is penetrated through the center thereof, and the second high-concentration channel may be formed along the periphery of the second reaction space and spaced apart from the inner surface of the second reaction space, and the second low-concentration channel may be formed in an uneven manner along the inner surface of the second reaction space between the second high-concentration channels. The electrode gasket may have electrode portions formed in the center thereof to face the first reaction space and / or the second reaction space, and at least some of the electrode portions may have a flow passage formed therethrough so that the adjacent first reaction space and / or the second reaction space communicate with each other. Through this, high-concentration channels and low-concentration channels may be separated within the electrode module, and cross-flow and / or parallel flow of the fluid may be implemented within and / or between unit stacks.

[0013] For example, the electrode gasket may include a first electrode gasket having a first electrode portion; and a second electrode gasket having a second electrode portion. A plurality of communication channels may be formed along the periphery of the first electrode portion and the second electrode portion to communicate between the first high-concentration channel and the second high-concentration channel and between the first low-concentration channel and the second low-concentration channel, respectively. The communication channels of the first electrode gasket and the communication channels of the second electrode gasket may be formed such that at least a portion thereof overlaps with each other along the longitudinal direction of the case. Through this, the high-concentration channel and the low-concentration channel are separated within the electrode module, so that various flow patterns, such as cross-flow and / or parallel flow, can be implemented within and / or between unit stacks.

[0014] Specifically, the first reaction space and the second reaction space may be formed in a circular shape. The radius of the first reaction space may be formed to be larger than the radial length of the first high-concentration channel, and the radius of the second reaction space may be formed to be larger than the radial length of the second low-concentration channel. Through this, the cross-sectional area of ​​the first reaction space may be secured as wide as possible, thereby increasing the deionization efficiency for high-concentration water.

[0015] More specifically, the first high-concentration channel and the second low-concentration channel may be formed such that their respective radial lengths are greater than or equal to their respective circumferential lengths. This allows for the gap between the first high-concentration channels to be formed as small as possible, while the channel length of the first high-concentration channel can be formed as long as possible, thereby effectively controlling the flow direction of the fluid.

[0016] Additionally, the first high-concentration channel and the second low-concentration channel may be formed such that their respective circumferential lengths are smaller than or equal to the spacing between adjacent channels. This allows the number of first high-concentration channels to be increased as much as possible, while increasing the effective area of ​​the first electrode unit and / or the second electrode unit, thereby improving deionization efficiency.

[0017] Additionally, at least a portion of the first low-concentration channel may overlap the first high-concentration channel in the circumferential direction. The second high-concentration channel may at least a portion of the second low-concentration channel may overlap the second low-concentration channel in the circumferential direction. Through this, the surface area of ​​the first reaction space including the first high-concentration channel can be maximized, thereby increasing the deionization efficiency.

[0018] For example, the first low-concentration channel and the second high-concentration channel may be formed such that their respective circumferential lengths are greater than or equal to their respective radial lengths. Through this, the first low-concentration channel can be formed as adjacent to the first reaction space as possible, while simultaneously increasing the cross-sectional area of ​​the first low-concentration channel (1213c) as much as possible.

[0019] In addition, the electrode portion may be formed in a circular shape. The radius of the electrode portion may be formed to be greater than or equal to the radius of the first reaction space portion and the radius of the second reaction space portion. Through this, the deionization efficiency in the electrode module may be improved or the size of the first electrode portion may be minimized, thereby reducing the manufacturing cost.

[0020] Specifically, at least a portion of the first high-concentration channel connected to the first reaction space and the second low-concentration channel connected to the second reaction space may overlap the electrode portion in the longitudinal direction of the case. Through this, a portion of the first high-concentration channel and / or the second low-concentration channel may also form the first reaction space and / or the second reaction space, thereby expanding the actual reaction area of ​​the first reaction space and / or the second reaction space, thereby improving the deionization efficiency.

[0021] For example, a first spacer in a mesh shape may be inserted into the first reaction space, and a second spacer in a mesh shape may be inserted into the second reaction space. The first spacer may have an outer circumferential surface formed to be uneven and may be inserted into the first high-concentration channel, and the second spacer may have an outer circumferential surface formed to be uneven and may be inserted into the second high-concentration channel. Through this, a portion of the first spacer may be inserted into the first high-concentration channel, thereby more stably separating the first electrode portion and the second electrode portion.

[0022] In the capacitive deionization device according to the present embodiment, high-concentration channels and low-concentration channels are separated within the electrode module, and cross-flow and / or parallel flow of the fluid is implemented within and / or between the unit stacks, so that the current is evenly distributed across the entire area of ​​the flow channel, while the ion transfer effect between the electrode and the fluid and the ion adsorption capacity of the electrode can be maximized.

[0023] In addition, the capacitive deionization device according to the present embodiment can change the stacking form of the unit stack in various ways so that the fluid within the electrode module can flow in parallel with multiple flows mixed together, thereby increasing the contact area between the electrode and the fluid, thereby maximizing the ion transfer effect and the ion adsorption capacity of the electrode, thereby increasing the deionization efficiency.

[0024] Furthermore, the capacitive deionization device according to the present embodiment can appropriately arrange each unit stack by appropriately changing the arrangement order of the gaskets. This allows for a more diverse variation of the fluid flow pattern within the electrode module, thereby further expanding the scope of application of the capacitive deionization device.

[0025] Fig. 1 is a perspective view showing the appearance of a capacitive deionization device according to the present embodiment.

[0026] Fig. 2 is a cross-sectional view showing the inside of a capacitive deionization device according to the present embodiment.

[0027] Figure 3 is a cross-sectional view showing the unit stack in Figure 2.

[0028] Fig. 4 is a perspective view showing a unit stack according to the present embodiment.

[0029] Fig. 5 is a perspective view showing the unit stack according to Fig. 4 in an exploded manner.

[0030] Figures 6a to 6d are plan views showing each gasket in Figure 5.

[0031] Fig. 7 is a plan view showing the stacked gaskets disclosed in Figs. 6a to 6d.

[0032] Fig. 8 is a perspective view showing an exploded first example of a unit stack to explain the movement process of fluid in the unit stack according to Fig. 5.

[0033] Fig. 9 is a perspective view showing an exploded view of a second example of a unit stack according to the present embodiment.

[0034] The capacitive deionization device according to the present invention is described in detail based on an attached embodiment.

[0035] Fig. 1 is a perspective view showing the appearance of a capacitive deionization device according to the present embodiment.

[0036] Referring to FIG. 1, a capacitive deionization device according to the present embodiment may include a case (110) and an electrode module (120). The case (110) is a component forming the exterior of the capacitive deionization device, and the electrode module (120) is a component that deionizes raw water passing through the case (110).

[0037] The case (110) according to the present embodiment may have a module receiving space (110a) formed therein. The module receiving space (110a) may be formed to be elongated along the longitudinal direction (or axial direction) of the case (110). Accordingly, unit stacks (121) forming electrode modules (120) may be continuously stacked along the longitudinal direction in the module receiving space (110a).

[0038] For example, the inner surface of the module receiving space (110a) may be formed in a cylindrical shape and / or an angular cross-section shape. In the former case, the fluid in the module receiving space (110a) flows radially toward the circular electrode, so that the flow path length is shortened compared to the same area, so that the required pumping power is lowered and the dead volume is reduced, so that the deionization performance can be improved. In the latter case, the electrode module (120) can be firmly fixed to the module receiving space (110a). The present embodiment illustrates an example in which the module receiving space (110a) is formed in a cylindrical shape.

[0039] Specifically, the case (110) may include a case body (111) with both ends open, a first cover (112) covering one longitudinal end of the case body (111), and a second cover (113) covering the other longitudinal end of the case body (111). The case body (111) may be formed in a cylindrical shape, and the first cover (112) and the second cover (113) may each be formed in a disc shape. Accordingly, the case (110) may be formed in an overall cylindrical shape.

[0040] In the case body (111), the module receiving space (110a) described above is formed long along the longitudinal direction of the case (110), and the inner surface of the module receiving space (110a) can be formed in a circular cross-section shape like the outer surface of the case body (111). Accordingly, the electrode module (120) described later can be formed in a circular cross-section shape to correspond to the inner surface of the case body (111).

[0041] The first cover (112) is formed in a circular shape as described above, but a first fixing projection (not shown) into which one end of the case body (111) is inserted and assembled may be formed on one side edge facing the case body (111). Accordingly, the first cover (112) can be tightly sealed and coupled to one end of the case body (111).

[0042] A single inlet (1121) may be formed through the first cover (112). The inlet (1121) may be formed at the center of the first cover (112). Accordingly, the raw water flowing in through the inlet (1121) may be evenly distributed radially in the electrode module (120) described below, thereby increasing the deionization efficiency.

[0043] The second cover (113) is formed in a circular shape as described above, but a second fixing protrusion (not shown) into which the other end of the case body (111) is inserted and assembled may be formed on the edge of one side facing the case body (111). Accordingly, the second cover (113) can be tightly sealed and coupled to the other end of the case body (111).

[0044] A single outlet (1131) may be formed through the second cover (113). The outlet (1131) may be formed at the center of the second cover (113). Accordingly, the fluid passing through the electrode module (120) described below may be evenly radially collected in the electrode module (120), thereby increasing the deionization efficiency.

[0045] Although not shown in the drawing, the first fixing protrusion and / or the second fixing protrusion may be formed in the center of the first cover (112) and / or the second cover (113) and inserted into and joined to one end and / or the other end of the case (110).

[0046] Additionally, although not shown in the drawing, multiple inlets (1121) and outlets (1131) may be formed. In this case, reliability can be increased by diversifying the flow path of the fluid within the case (110).

[0047] FIG. 2 is a cross-sectional view showing the inside of a capacitive deionization device according to the present embodiment, FIG. 3 is a cross-sectional view showing a unit stack in FIG. 2, FIG. 4 is a perspective view showing a unit stack according to the present embodiment, FIG. 5 is an exploded perspective view showing the unit stack in FIG. 4, FIGS. 6a to 6d are plan views showing each gasket in FIG. 5, and FIG. 7 is a plan view showing the gaskets disclosed in FIGS. 6a to 6d stacked.

[0048] Referring to FIG. 2, the electrode module (120) according to the present embodiment may be formed of at least one unit stack (121). In other words, the electrode module (120) may be formed of one unit stack (121), or a plurality of unit stacks (121) may be sequentially stacked along the length direction of the case (110). In the former case, a high-concentration channel (C1) and a low-concentration channel (C2) may be formed to be separated in one unit stack (121), and in the latter case, the high-concentration channel (C1) and the low-concentration channel (C2) may be formed to be separated in each unit stack (121), or the high-concentration channel (C1) and the low-concentration channel (C2) may be formed to be alternately separated according to the unit stack (121). This embodiment illustrates an example in which a plurality of unit stacks (121) are stacked, and a high-concentration channel (C1) and a low-concentration channel (C2) are formed separately for each unit stack (121). Hereinafter, each unit stack (121) is collectively referred to as an electrode module (120).

[0049] Referring to FIGS. 2 to 4, the electrode module (120) according to the present embodiment may include a first support plate (1211), a second support plate (1212), a first channel gasket (1213), a second channel gasket (1214), a first electrode gasket (1215), and a second electrode gasket (1216). The first support plate (1211) and the second support plate (1212) are members provided at each of the longitudinal ends of the electrode module (120) to support a gasket laminate, the first channel gasket (1213) and the second channel gasket (1214) are members that control the flow direction of a fluid, and the first electrode gasket (1215) and the second electrode gasket (1216) are members that deionize the fluid.

[0050] The first support plate (1211) and the second support plate (1212) may be formed in the same shape as the module receiving space (110a) of the case (110), respectively. For example, the first support plate (1211) and the second support plate (1212) according to the present embodiment may be formed in a circular shape. Accordingly, the first support plate (1211) and the second support plate (1212) may be inserted and fixed into the module receiving space (110a) of the case (110) while fixing a gasket laminate (not shown) in which gaskets (1213), (1214), (1215), and (1216) are laminated, respectively.

[0051] An inlet port (1211a) may be formed at the center of the first support plate (1211) and may be coaxially connected with the inlet port (1121) of the case (110), and an outlet port (1212a) may be formed at the center of the second support plate (1212) and may be coaxially connected with the inlet port (1211a) of the first support plate (1211). Accordingly, the fluid within the electrode module (120) may be evenly distributed radially, thereby improving the deionization efficiency.

[0052] Referring to FIGS. 5, 6a, and 7, the first channel gasket (1213) is formed in a circular shape to correspond to the first support plate (1211) and / or the second support plate (1212), and the first high-concentration channel (1213b) and the first low-concentration channel (1213c), which will be described later, may be provided separately from each other. For example, the first channel gasket (1213) may be formed with a first reaction space (1213a) penetrating the center thereof, and the first high-concentration channel (1213b) may be formed in an uneven manner along the inner surface of the first reaction space (1213a), and the first low-concentration channel (1213c) may be formed between the first high-concentration channels (1213b) and spaced apart from the inner surface of the first reaction space (1213a). Accordingly, the first high-concentration channel (1213b) and the first low-concentration channel (1213c) can be formed separately from each other.

[0053] The first reaction space (1213a) is formed in a circular shape, and the radius (D1) of the first reaction space (1213a) may be formed to be larger than the radial length (L11) of the first high-concentration channel (1213b). Accordingly, the cross-sectional area of ​​the first reaction space (1213a) can be secured as wide as possible, thereby increasing the deionization efficiency for raw water.

[0054] Additionally, a first spacer (1217) formed in a mesh shape may be inserted into the first reaction space (1213a). The first spacer (1217) may be formed of a non-conductive material and have the same thickness as the first channel gasket (1213). Accordingly, the fluid may flow smoothly in the first reaction space (1213a) while stably separating the first electrode portion (1215a) and the second electrode portion (1216a) described later.

[0055] In this case, the first spacer (1217) may be formed in a circular shape and inserted only into the first reaction space (1213a), but as in the present embodiment, the first high-concentration channel (1213b) to be described later is opened toward the first reaction space (1213a) so that the first high-concentration channel (1213b) forms the actual first reaction space (1213a), and thus the outer circumferential surface of the first spacer (1217) may be formed to have the same shape as the first high-concentration channel (1213b). Accordingly, a part of the first spacer (1217) may be inserted into the first high-concentration channel (1213b), thereby more stably separating the first electrode portion (1215a) and the second electrode portion (1216a).

[0056] As previously described, the first high-concentration channel (1213b) may be formed in an uneven manner along the inner surface of the first reaction space (1213a). In other words, the first high-concentration channel (1213b) may be connected to the outer surface of the first reaction space (1213a) and may substantially form a portion of the first reaction space (1213a). Accordingly, the actual reaction area of ​​the first reaction space (1213a) may increase, thereby improving the deionization efficiency of the fluid.

[0057] The first high-concentration channels (1213b) may be formed at equal intervals along the inner surface of the first reaction space (1213a), or may be formed at different intervals. In the former case, not only is the first high-concentration channels (1213b) easy to process, but the diffusion effect of the fluid can be enhanced. In the latter case, the first high-concentration channels (1213b) can be optimized by considering surrounding structures such as electrode holes and / or reference holes. This embodiment illustrates an example in which the first high-concentration channels (1213b) are formed at equal intervals and / or different intervals along the inner surface of the first reaction space (1213a).

[0058] In addition, the first high-concentration channel (1213b) may be formed such that each radial length (L11) is greater than or equal to each circumferential length (L12). For example, the first high-concentration channel (1213b) may be formed such that each radial length (L11) is greater than each circumferential length (L12). Accordingly, the gap (G1) between the first high-concentration channels (1213b) may be formed as small as possible, while the channel length (unsigned) of the first high-concentration channel (1213b) may be formed as long as possible, thereby effectively controlling the flow direction of the fluid.

[0059] In addition, the first high-concentration channel (1213b) may be formed such that each circumferential length (L12) is less than or equal to the spacing (G1) between the first high-concentration channels (1213b). For example, the first high-concentration channel (1213b) may be formed such that each circumferential length (L12) is less than the spacing (G1) between the first high-concentration channels (1213b). Accordingly, the number of the first high-concentration channels (1213b) may be increased as much as possible, and the effective area of ​​the first electrode portion (1215a) and / or the second electrode portion (1216a) described later may be increased, thereby improving the deionization efficiency. However, in this case, the gap between the electrode hole of the first channel gasket (1213) and / or the first low-concentration channel (1213c) may become narrow, causing fluid passing through the channel to leak. Therefore, the circumferential length (L12) of the first high-concentration channel (1213b) may be appropriately adjusted taking this into consideration.

[0060] As previously described, the first low-concentration channel (1213c) may be formed by penetrating the first channel gasket (1213) at the outer edge of the first reaction space (1213a). For example, the first low-concentration channel (1213c) may be formed such that at least a portion of it overlaps the first high-concentration channel (1213b) in the circumferential direction. Accordingly, the surface area of ​​the first reaction space (1213a) including the first high-concentration channel (1213b) can be maximized, thereby enhancing the deionization efficiency.

[0061] In addition, the first low-concentration channel (1213c) may be formed long in the circumferential direction between the first high-concentration channels (1213b), for example, the first low-concentration channel (1213c) may be formed such that each circumferential length (L14) is greater than or equal to the radial length (L13). Accordingly, the first low-concentration channel (1213c) may be formed as adjacent to the first reaction space (1213a) as possible, while simultaneously increasing the cross-sectional area of ​​the first low-concentration channel (1213c) as much as possible.

[0062] Referring to FIGS. 5, 6b, and 7, the second channel gasket (1214) is formed in a similar manner to the first channel gasket (1213) as a whole, but the high-concentration channel (C1) and the low-concentration channel (C2) of the second channel gasket (1214) may be formed in opposite directions to the high-concentration channel (C1) and the low-concentration channel (C2) of the first channel gasket (1213). Accordingly, a so-called cross-flow, counter-flow, or return-flow, in which the fluid flows in both directions along the radial direction, may be formed within the electrode module (120). Hereinafter, a shape in which the fluid flows in both directions along the radial direction is defined as a cross-flow and described.

[0063] In other words, the second low-concentration channel (1214c) may be connected to the second low-concentration channel (1214c) but may also be connected to the first high-concentration channel (1213b), and the second high-concentration channel (1214b) may be connected to the second high-concentration channel (1214b) but may also be connected to the first low-concentration channel (1213c). Accordingly, depending on the stacking order of the first channel gasket (1213) and the second channel gasket (1214), the high-concentration channel (C1) and the low-concentration channel (C2) may be formed to be separated from each other, while branching or merging along the fluid movement path so that the fluid may form a cross-flow within the electrode module (120).

[0064] Specifically, the second channel gasket (1214) is formed in a circular shape to correspond to the first support plate (1211) and / or the second support plate (1212), and the second low-concentration channel (1214c) and the second high-concentration channel (1214b) may be provided separately from each other. For example, the second channel gasket (1214) may be formed with a second reaction space (1214a) penetrating the center thereof, and the second high-concentration channel (1214b) may be formed along the periphery of the second reaction space (1214a) to be spaced apart from the inner surface of the second reaction space (1214a), and between the second high-concentration channels (1214b), the second low-concentration channel (1214c) may be formed in an uneven manner along the inner surface of the second reaction space (1214a). Accordingly, the second high-concentration channel (1214b) and the second low-concentration channel (1214c) can be formed separately from each other.

[0065] The second reaction space (1214a) is formed in a circular shape, and the radius (D2) of the second reaction space (1214a) can be formed to be larger than the radial length (L23) of the second low-concentration channel (1214c). Accordingly, the cross-sectional area of ​​the second reaction space (1214a) can be secured as wide as possible, thereby increasing the deionization efficiency for raw water.

[0066] Additionally, a second spacer (1218) formed in a mesh shape may be inserted into the second reaction space (1214a). The second spacer (1218) may be formed of a non-conductive material and have the same thickness as the second channel gasket (1214). Accordingly, the fluid may flow smoothly in the second reaction space (1214a) while stably separating the first electrode portion (1215a) and the second electrode portion (1216a) described later.

[0067] In this case, the second spacer (1218) may be formed in a circular shape and inserted only into the second reaction space (1214a), but like the first spacer (1217) described above, the outer surface of the second spacer (1218) may be formed to have the same shape as the second low-concentration channel (1214c). Accordingly, a part of the second spacer (1218) may be inserted into the second low-concentration channel (1214c), thereby more stably separating the first electrode portion (1215a) and the second electrode portion (1216a).

[0068] As described above, the second high-concentration channel (1214b) may be formed by penetrating the second channel gasket (1214) at the outer edge of the second reaction space (1214a). For example, the second high-concentration channel (1214b) may be formed to overlap at least a portion of the second low-concentration channel (1214c) described later in the circumferential direction. Accordingly, since the second high-concentration channel (1214b) is formed as close as possible to the second reaction space (1214a), the surface area of ​​the second reaction space (1214a) including the second low-concentration channel (1214c) can be maximized to increase the deionization efficiency.

[0069] In addition, the second high-concentration channel (1214b) may be formed to be long along the circumferential direction, for example, each of the second high-concentration channels (1214b) may have a circumferential length greater than or equal to its radial length. Accordingly, the second high-concentration channel (1214b) may be formed as close to the second reaction space (1214a) as possible, while simultaneously increasing the cross-sectional area of ​​the second high-concentration channel (1214b) as much as possible.

[0070] As previously described, the second low-concentration channel (1214c) may be formed in an uneven manner along the inner surface of the second reaction space (1214a). In other words, the second low-concentration channel (1214c) may be connected to the outer surface of the second reaction space (1214a) and may substantially form a portion of the second reaction space (1214a). Accordingly, the actual reaction area of ​​the second reaction space (1214a) may increase, thereby improving the deionization efficiency of the fluid.

[0071] In this case, the second reaction space (1214a) may be formed at equal intervals along the inner surface thereof, or may be formed at different intervals. In the former case, not only is the processing of the second low-concentration channel (1214c) easy, but the diffusion effect of the fluid can be enhanced. In the latter case, the second low-concentration channel (1214c) can be optimized by considering surrounding structures such as electrode holes and / or reference holes. This embodiment illustrates an example in which the second low-concentration channel (1214c) is formed at equal intervals and / or at different intervals along the inner surface thereof.

[0072] In addition, the second low-concentration channels (1214c) may be formed such that each radial length (L23) is greater than or equal to each circumferential length (L24). For example, the second low-concentration channels (1214c) may be formed such that each radial length (L23) is greater than each circumferential length (L24). Accordingly, the gap (G2) between the second low-concentration channels (1214c) may be formed as small as possible, while the channel length (unsigned) of the second low-concentration channels (1214c) may be formed as long as possible, thereby effectively controlling the flow direction of the fluid.

[0073] In addition, the second low-concentration channels (1214c) may be formed such that each circumferential length (L24) is less than or equal to the spacing (G2) between the second low-concentration channels (1214c). For example, the second low-concentration channels (1214c) may be formed such that each circumferential length is less than the spacing (G2) between the second low-concentration channels (1214c). Accordingly, the number of second low-concentration channels (1214c) may be increased as much as possible, and the effective area of ​​the second electrode portion (1216a) and / or the first electrode portion (1215a) described later may be increased, thereby improving the deionization efficiency. However, in this case, the gap between the electrode hole of the second channel gasket (1214) and / or the second high-concentration channel (1214b) may become narrow, causing fluid passing through the channel to leak. Therefore, the circumferential length (L24) of the second low-concentration channel (1214c) may be appropriately adjusted taking this into consideration.

[0074] Referring to FIGS. 5, 6c and 7, the first electrode gasket (1215) is formed in a circular shape to correspond to the first channel gasket (1213) and / or the second channel gasket (1214), and the first electrode portion (1215a) is formed in the center to face the first reaction space portion (1213a) and / or the second reaction space portion (1214a), and a first communication channel (1215b) and a second communication channel (1215c) are formed alternately along the periphery of the first electrode portion (1215a), and a flow passage (1216d) can be formed in the center of the first electrode portion (the second electrode portion described later in this embodiment) (1215a) to communicate between the two reaction spaces (1213a) (1214a). Accordingly, a cross-flow can be formed in which the fluid within the electrode module (120) radially spreads from the electrode gasket on the leading side based on the direction of fluid flow and then converges at the electrode gasket on the rear side.

[0075] Specifically, the first electrode portion (1215a) is formed in a circular shape so as to overlap the first reaction space portion (1213a) and / or the second reaction space portion (1214a) in the longitudinal direction (or axial direction) of the case (110), and the radius (D3) of the first electrode portion (1215a) may be formed to be greater than or equal to the radius (D1)(D2) of the first reaction space portion (1213a) and / or the second reaction space portion (1214a). When the radius (D3) of the first electrode portion (1215a) is formed to be larger than the radius (D1)(D2) of the first reaction space portion (1213a) and / or the second reaction space portion (1214a), the deionization efficiency in the electrode module (120) can be improved, and when the radius (D3) of the first electrode portion (1215a) is formed to be the same as the radius (D1)(D2) of the first reaction space portion (1213a) and / or the second reaction space portion (1214a), the size of the first electrode portion (1215a) can be minimized, thereby reducing the manufacturing cost. This embodiment illustrates an example in which the radius (D3) of the first electrode portion (1215a) is formed to be larger than the radius (D1)(D2) of the first reaction space portion (1213a) and / or the second reaction space portion (1214a).

[0076] In other words, the first electrode portion (1215a) may be formed to overlap a portion of the first high-concentration channel (1213b) and / or a portion of the second low-concentration channel (1214c) in the longitudinal direction (or axial direction) of the case (110). Accordingly, a portion of the first high-concentration channel (1213b) and / or the second low-concentration channel (1214c) also forms the first reaction space (1213a) and / or the second reaction space (1214a), thereby expanding the actual reaction area of ​​the first reaction space (1213a) and / or the second reaction space (1214a), thereby improving the deionization efficiency.

[0077] The first communication channel (1215b) and the second communication channel (1215c) may be formed alternately along the periphery of the first electrode portion (1215a) from the outer edge of the first electrode portion (1215a). The first communication channel (1215b) and the second communication channel (1215c) may be formed identically in their entirety, or at least partially formed differently. In the former case, the first communication channel (1215b) and the second communication channel (1215c) can be easily processed, and in the latter case, the high-concentration channel (C1) and / or the low-concentration channel (C2) can be smoothly communicated by the first communication channel (1215b) and the second communication channel (1215c). This embodiment illustrates an example in which the first communication channel (1215b) and the second communication channel (1215c) are formed differently to correspond to the high-concentration channel (C1) and / or the low-concentration channel (C2).

[0078] For example, the first communication channel (1215b) of the first electrode gasket (1215) may be formed such that the first high-concentration channel (1213b) and the second high-concentration channel (or the first high-concentration channel) (1214b) overlap each other at least partially along the longitudinal direction of the case (110), and the second communication channel (1215c) of the first electrode gasket (1215) may be formed such that the first low-concentration channel (1213c) and the second low-concentration channel (or the first low-concentration channel) (1214c) overlap each other at least partially along the longitudinal direction of the case (110). Accordingly, the fluid may flow in both directions along the radial direction by the high-concentration channel (C1), the low-concentration channel (C2), and the first communication channel (1215b) and the second communication channel (1215c) while simultaneously flowing along the longitudinal direction of the case (110). Through this, the reaction area of ​​the electrode is expanded as the fluid cross-flows within the electrode module (120) as well as parallel flow is implemented, thereby improving the deionization efficiency.

[0079] In this case, the first communication channel (1215b) may be formed to be the same as or nearly the same as the circumferential length (L12) of the first high-concentration channel (1213b) and / or the circumferential length (L22) of the second high-concentration channel (1214b) overlapping in the longitudinal direction of the case (110), and the second communication channel (1215c) may be formed to be the same as or nearly the same as the circumferential length (L14) of the first low-concentration channel (1213c) and / or the circumferential length (L24) of the second low-concentration channel (1214c) overlapping in the longitudinal direction of the case (110). Accordingly, the flow resistance in the high-concentration channel (C1) and the low-concentration channel (C2) may be minimized, thereby increasing energy efficiency.

[0080] Referring to FIGS. 5, 6d, and 7, the second electrode gasket (1216) is the same as the first electrode gasket (1215) described above except for the polarity of the electrode, and therefore, the description of the first electrode gasket (1215) will be replaced. For example, the second electrode gasket (1216) may have a second electrode portion (negative electrode) (1216a) formed therein, the flow passage (1216d) described above may be formed at the center of the second electrode portion (1216a), and a first communication channel (1215b) and a second communication channel (1215c) may be formed alternately along the periphery of the second electrode portion (1216a).

[0081] The second electrode portion (1216a) is formed to correspond to the first electrode portion (positive electrode) (1215a), and a flow passage (1216d) as described above may be formed in the center thereof. The flow passage (1216d) may be formed in the first electrode portion (1215a), or may be formed in each of the first electrode portion (1215a) and the second electrode portion (1216a). Accordingly, a cross-flow may be implemented in which the fluid within the electrode module (120) moves along the longitudinal direction of the case (110) and flows in both radial directions by the high-concentration channel (C1) and the low-concentration channel (C2).

[0082] In addition, the first communication channel (1215b) and the second communication channel (1215c) of the second electrode gasket (1216) may be formed to correspond to the first communication channel (1215b) and the second communication channel (1215c) of the first electrode gasket (1215) described above, and may be formed to overlap the first communication channel (1215b) and the second communication channel (1215c) of the first electrode gasket (1215) in the longitudinal direction of the case (110). In other words, the first communication channel (1215b) and the second communication channel (1215c) of the second electrode gasket (1216) are communicated with the first communication channel (1215b) and the second communication channel (1215c) of the first electrode gasket (1215) in the longitudinal direction of the case (110), so that the high-concentration channel (C1) on the leading side and the high-concentration channel (C1) on the trailing side or the low-concentration channel (C2) on the turning side and the low-concentration channel (C2) on the trailing side can be communicated. Accordingly, the fluid within the electrode module (120) can flow along the longitudinal direction of the case (110) by the first communication channel (1215b) and the second communication channel (1215c) of each electrode gasket (1215)(1216). Through this, the fluid within the electrode module (120) can implement not only crossflow but also parallel flow, thereby expanding the reaction area of ​​the electrode and improving the deionization efficiency.

[0083] Although not illustrated in the drawing, ion exchange membranes (not shown) may be provided on both sides of the first electrode gasket (1215) and / or the second electrode gasket (1216). For example, cation exchange membranes (not shown) may be provided on both sides of the first electrode gasket (1215) forming the positive electrode, and anion exchange membranes (not shown) may be provided on both sides of the second electrode gasket (1216) forming the negative electrode. Accordingly, the deionization efficiency in the first electrode portion (1215a) of the first electrode gasket (1215) and / or the second electrode portion (1216a) of the second electrode gasket (1216) may be improved.

[0084] The operational effects of the capacitor-type deionization device according to the present embodiment as described above are as follows.

[0085] That is, high-concentration raw water flows into the module receiving space (110a) of the case (110) through the inlet (1121) of the case (110), and the raw water passes through the electrode module (120) received in the module receiving space (110a) and is deionized by the first electrode part (e.g., positive electrode) (1215a) and the second electrode part (e.g., negative electrode) (1216a) provided in the electrode module (120), and the deionized purified water can be discharged through the outlet (1131) of the case (110).

[0086] At this time, since the electrode module (120) is provided with a plurality of channel gaskets (1213)(1214) on both sides of the first electrode gasket (1215) and the second electrode gasket (1216) so that the high-concentration channel (C1) and the low-concentration channel (C2) are separated from each other, the flow pattern of the fluid within the electrode module (120) can be varied depending on the arrangement order of the channel gaskets (1213)(1214).

[0087] For example, as shown in FIG. 5, the electrode module (120) may be laminated (first lamination example) in the order of 1-1 channel gasket (A11) - 1-1 electrode gasket (positive electrode) (B11) - 1-2 channel gasket (A12) - 2-1 electrode gasket (negative electrode) (B21) - 2-1 channel gasket (A21) - 1-2 electrode gasket (B12) - 1-3 channel gasket (A13) - 2-2 electrode gasket (B22) - 2-2 channel gasket (A22) - 1-3 electrode gasket (B13) - 2-3 channel gasket (A23) along the length direction of the case (110).

[0088] In this case, the 1-1 channel gasket (A11), the 1-2 channel gasket (A12), and the 1-3 channel gasket (A13) may be formed identically to each other and arranged to correspond along the longitudinal direction of the case (110), and the 2-1 channel gasket (A21), the 2-2 channel gasket (A22), and the 2-3 channel gasket (A23) may be formed identically to each other and arranged to correspond along the longitudinal direction of the case (110). However, as described above, the channel shapes of the 1-1 channel gasket (A11), the 1-2 channel gasket (A12), and the 1-3 channel gasket (A13) may be formed to have opposite shapes on the same axis as the channel shapes of the 2-1 channel gasket (A21), the 2-2 channel gasket (A22), and the 2-3 channel gasket (A23). In other words, the high-concentration channels (C1) of the 1-1 channel gasket (A11), the 1-2 channel gasket (A12), and the 1-3 channel gasket (A13) are arranged on the same axis with the high-concentration channels (C1) and the low-concentration channels (C2) are arranged on the same axis with the low-concentration channels (C2), and the high-concentration channels (C1) of the 2-1 channel gasket (A21), the 2-2 channel gasket (A22), and the 2-3 channel gasket (A23) are arranged on the same axis with the high-concentration channels (C1) and the low-concentration channels (C2) are arranged on the same axis with the low-concentration channels (C2).

[0089] And, the first communication channel (1215b) of the 1-1 electrode gasket (B11), the 1-2 electrode gasket (B12), and the 1-3 electrode gasket (B13) may be arranged on the same axis as the high-concentration channel (C1) of the 1-1 electrode gasket (B11), the 1-2 electrode gasket (B12), and the 1-3 electrode gasket (B13), respectively, and the second communication channel (1215c) of the 1-1 electrode gasket (B11), the 1-2 electrode gasket (B12), and the 1-3 electrode gasket (B13) may be arranged on the same axis as the low-concentration channel (C2) of the 1-1 electrode gasket (B11), the 1-2 electrode gasket (B12), and the 1-3 electrode gasket (B13), respectively.

[0090] In addition, the first communication channel (1215b) of the 2-1 electrode gasket (B21) and the 2-2 electrode gasket (B22) may be arranged on the same axis as the high-concentration channel (C1) of the 1-1 electrode gasket (B11), the 1-2 electrode gasket (B12), and the 1-3 electrode gasket (B13), respectively, and the second communication channel (1215c) of the 2-1 electrode gasket (B21) and the 2-2 electrode gasket (B22) may be arranged on the same axis as the low-concentration channel (C2) of the 1-1 electrode gasket (B11), the 1-2 electrode gasket (B12), and the 1-3 electrode gasket (B13), respectively.

[0091] In addition, the flow passages (1216d) described above are formed in the second electrode portion (1216a) of the 2-1 electrode gasket (B21) and the second electrode portion (1216a) of the 2-2 electrode gasket (B22), respectively, and these flow passages (1216d) can be arranged on the same axis along the longitudinal direction of the case (110).

[0092] When electrode modules (120) are stacked as described above, cross-flow in which the fluid moves in both directions in the radial direction within the electrode modules (120) as well as parallel flow in which multiple flows are mixed can be possible. Fig. 8 is a perspective view showing a first stacked example of a unit stack in an exploded manner to explain the movement process of the fluid in the unit stack according to Fig. 5.

[0093] Referring to FIG. 8, the high-concentration raw water (hereinafter, high-concentration fluid) flowing into the first reaction space (1213a) of the 1-1 channel gasket (A11) through the inlet (1211a) of the first support plate (1211) is blocked by the first electrode portion (1215a) of the 1-1 electrode gasket (B11) and radially diffuses, moving to the first high-concentration channel (1213b) of the 1-1 channel gasket (A11). This high-concentration fluid moves to the first high-concentration channel (1213b) of the 1-2 channel gasket (A12) through the first communication channel (1215b) of the 1-1 electrode gasket (B11) that is connected to the first high-concentration channel (1213b) of the 1-1 channel gasket (A11).

[0094] Next, a portion of the high-concentration fluid that has moved to the first high-concentration channel (1213b) of the first-second channel gasket (A12) is blocked by the second electrode portion (1216a) of the second-first electrode gasket (B21) in the first reaction space portion (1213a) of the first-second channel gasket (A12) and radially gathers toward the flow passage (1216d) provided at the center of the second electrode portion (1216a). At this time, the high-concentration fluid is first deionized into low-concentration deionized water (hereinafter, low-concentration fluid) between the first electrode portion (1215a) and the second electrode portion (1216a).

[0095] Next, this primary deionized low-concentration fluid (primary low-concentration fluid) passes through the flow passage (1216d) of the second electrode portion (1216a) provided in the 2-1 electrode gasket (B21) and flows into the second reaction space portion (1214a) of the 2-1 channel gasket (A21), and the primary low-concentration fluid flowing into the second reaction space portion (1214a) of the 2-1 channel gasket (A21) is blocked by the first electrode portion (1215a) of the 1-2 electrode gasket (B12) and spreads radially, thereby moving to the second low-concentration channel (1214c) of the 2-1 channel gasket (A21). At this time, the primary low-concentration fluid is secondarily deionized into low-concentration deionized water (hereinafter, secondary low-concentration fluid) between the second electrode unit (1216a) and the first electrode unit (1215a).

[0096] Next, this secondary deionized low-concentration fluid (secondary low-concentration fluid) repeats a series of processes of moving from the second low-concentration channel (1214c) of the 2-1 channel gasket (A21) to the first high-concentration channel (1213b) of the 1-3 channel gasket (A13) through the first communication channel (1215b) of the 1-2 electrode gasket (B12), and then can be discharged from the corresponding unit stack (121) through the outlet (1212a) of the second support plate (1212). This repeats the deionization process in the unit stack (121) depending on the number and arrangement of the unit stacks (121).

[0097] Meanwhile, another portion of the high-concentration fluid that has moved to the first high-concentration channel (1213b) of the 1-2 channel gasket (A12) moves to the second high-concentration channel (1214b) of the 2-1 channel gasket (A21) through the first communication channel (1215b) of the 2-1 electrode gasket (B21) connected to the first high-concentration channel (1213b) of the 1-2 channel gasket (A12), and this high-concentration fluid passes through the first communication channel (1215b) of the 1-2 electrode gasket (B12) and moves to the first high-concentration channel (1213b) of the 1-3 channel gasket (A13). At this time, since the 1-3 channel gasket (A13) is formed to correspond to the 1-1 channel gasket (A11) and the 1-2 channel gasket (A12), the high-concentration fluid that has moved to the first high-concentration channel (1213b) of the 1-3 channel gasket (A13) is reflected and collected toward the flow path (1216d) of the 2-2 electrode gasket (B22). In this process, the high-concentration fluid can be deionized into low-concentration deionized water (hereinafter, low-concentration fluid) between the first electrode portion (1215a) of the 1-2 electrode gasket (B12) and the second electrode portion (1216a) of the 2-2 electrode gasket (B22).

[0098] Next, this low-concentration fluid can be sequentially moved according to the arrangement of the channel gaskets (1213)(1214) and the electrode gaskets (1215)(1216) and undergo deionization several times before being discharged from the unit stack (121) through the outlet (1212a) of the second support plate (1212). This repeats the deionization process in the unit stack (121) depending on the number and arrangement of the unit stacks (121).

[0099] In this way, the fluid flows alternately in both radial directions within the unit stack, forming a cross-flow pattern, while simultaneously realizing parallel flow in which multiple flows are mixed. This allows the current to be evenly distributed across the entire channel area rather than concentrated on the upstream electrode of the flow. In addition, by forming the flow between adjacent stacks in opposite directions, the contact area between the electrodes and the fluid is expanded, thereby maximizing the ion transfer effect and the ion adsorption capacity of the electrode, thereby enhancing the deionization efficiency.

[0100] In addition, by appropriately changing the arrangement order of the channel gaskets, the fluid flow pattern between the unit stack and / or multiple unit stacks can be varied as needed, thereby expanding the scope of application for the capacitive deionization device.

[0101] Meanwhile, as described above, the capacitive deionization device according to the present embodiment can change the arrangement order of the channel gasket and / or the electrode gasket appropriately to vary the fluid flow pattern between the unit stack and / or multiple unit stacks as needed, thereby expanding the range of applications for the capacitive deionization device. Fig. 9 is an exploded perspective view of a second stacking example of the unit stack according to the present embodiment.

[0102] Referring to FIG. 9, the electrode module (more precisely, unit stack) (120) according to the present embodiment can be stacked (second stacking example) in the order of 1-1 channel gasket (A11) - 2-1 electrode gasket (negative electrode) (B21) - 1-2 channel gasket (A12) - 2-1 electrode gasket (negative electrode) (B21) - 1-3 channel gasket (A13) - 1-1 electrode gasket (positive electrode) (B11) - 1-3 channel gasket (A13) along the longitudinal direction of the case (110).

[0103] In this case, some of the high-concentration raw water flowing into the first reaction space (1213a) of the 1-1 channel gasket (A11) through the inlet (1211a) of the first support plate (1211) is blocked by the second electrode section (1216a) of the 2-1 electrode gasket (B21) and radially diffuses, moving to the first high-concentration channel (1213b) of the 1-1 channel gasket (A11), and another part of the raw water can flow into the first reaction space (1213a) of the 1-2 channel gasket (A12) through the flow passage (1216d) provided in the second electrode section (1216a) of the 2-1 electrode gasket (B21).

[0104] Next, a portion of the high-concentration fluid flowing into the first reaction space (1213a) of the 1-2 channel gasket (A12) is blocked by the second electrode portion (1216a) of the 2-2 electrode gasket (B22) and spreads radially, moving to the first high-concentration channel (1213b) of the 1-2 channel gasket (A12), and another portion of the high-concentration fluid can flow into the first reaction space (1213a) of the 1-3 channel gasket (A13) through the flow passage (1216d) provided in the second electrode portion (1216a) of the 2-2 electrode gasket (B22). At this time, the high-concentration fluid moves to the first high-concentration channel (1213b) of the first-second channel gasket (A12) and is first deionized into low-concentration deionized water (hereinafter, low-concentration fluid) between the first electrode unit (1215a) and the second electrode unit (1216a).

[0105] Next, the low-concentration fluid flowing into the first reaction space (1213a) of the 1-3 channel gasket (A13) is blocked by the first electrode portion (1215a) of the 1-1 electrode gasket (B11) and spreads radially, moving to the first high-concentration channel (1213b) of the 1-3 channel gasket (A13). At this time, the low-concentration fluid moves to the first high-concentration channel (1213b) of the 1-3 channel gasket (A13) and is secondarily deionized into low-concentration deionized water (hereinafter, low-concentration fluid) between the first electrode portion (1215a) and the second electrode portion (1216a).

[0106] When electrode modules (to be precise, unit stacks) (120) are stacked as described above, the fluid can flow in the so-called co-flow form, moving in the axial direction and a single radial direction within the electrode module (to be precise, unit stack) (120). However, when the first and second stacking examples described above are mixed, the fluid within the electrode module (120) can form a parallel flow comprising multiple flow forms. In other words, by changing the stacking form of the unit stacks (121) in various ways, the fluid within the electrode module (120) can form a parallel flow in which multiple flows are mixed. As described above, this allows the flows to be formed in opposite directions between adjacent stacks, thereby expanding the contact area between the electrodes and the fluid, thereby maximizing the ion transfer effect and the ion adsorption capacity of the electrode, thereby increasing the deionization efficiency.

[0107] In addition, by appropriately arranging each unit stack with an appropriate change in the arrangement order for the gasket, the fluid flow pattern within the electrode module can be further varied, thereby further expanding the scope of application for the capacitive deionization device.

Claims

1. A case in which one inlet is formed at one end in the longitudinal direction and one outlet is formed at the other end in the longitudinal direction; and It includes an electrode module that is provided inside the case and removes ionic substances from the raw water moving from the inlet to the outlet. The above electrode module, A first channel gasket in which the first high-concentration channel and the first low-concentration channel are provided separately from each other; A second channel gasket in which the second high-concentration channel and the second low-concentration channel are provided separately from each other; and It includes an electrode gasket laminated on at least one channel gasket among the first channel gasket and the second channel gasket, A capacitive deionization device in which the first high-concentration channel overlaps the second high-concentration channel in the longitudinal direction of the case, and the first low-concentration channel overlaps the second low-concentration channel in the longitudinal direction of the case.

2. In paragraph 1, The above first channel gasket, A first reaction space is formed through the center, and the first high-concentration channel is formed in an uneven manner along the inner surface of the first reaction space, and the first low-concentration channel is formed between the first high-concentration channels and is spaced apart from the inner surface of the first reaction space. The above second channel gasket, A second reaction space is formed through the center, and a second high-concentration channel is formed along the periphery of the second reaction space, spaced apart from the inner surface of the second reaction space, and a second low-concentration channel is formed in an uneven manner along the inner surface of the second reaction space between the second high-concentration channels. The above electrode gasket, A capacitive deionization device in which electrode parts are formed in the center to face the first reaction space and / or the second reaction space, and a flow passage is formed through at least some of the electrode parts so that the first reaction space and / or the second reaction space, which are adjacent to each other, are connected.

3. In paragraph 2, The above electrode gasket, A first electrode gasket having a first electrode portion; and A second electrode gasket having a second electrode portion is included, A plurality of communication channels are formed along the periphery of the first electrode section and the second electrode section, respectively, to connect the first high-concentration channel and the second high-concentration channel and the first low-concentration channel and the second low-concentration channel. The communication channel of the first electrode gasket and the communication channel of the second electrode gasket are, A capacitive deionization device formed such that at least a portion of the case overlaps with each other along the length of the case.

4. In paragraph 3, The first reaction space and the second reaction space are formed in a circular shape, A capacitive deionization device in which the radius of the first reaction space is formed to be larger than the radial length of the first high-concentration channel, and the radius of the second reaction space is formed to be larger than the radial length of the second low-concentration channel.

5. In paragraph 4, The above first high-concentration channel and the above second low-concentration channel, A capacitive deionization device in which each radial length is formed to be greater than or equal to each circumferential length.

6. In paragraph 4, The above first high-concentration channel and the above second low-concentration channel, A capacitive deionization device in which each circumferential length is formed to be less than or equal to the spacing between adjacent channels.

7. In paragraph 4, The first low-concentration channel overlaps at least partly with the first high-concentration channel in the circumferential direction, A capacitive deionization device wherein at least a portion of the second high-concentration channel overlaps the second low-concentration channel in the circumferential direction.

8. In paragraph 7, The above first low-concentration channel and the above second high-concentration channel, A capacitive deionization device in which each circumferential length is formed to be greater than or equal to each radial length.

9. In paragraph 4, The above electrode part is formed in a circular shape, The radius of the above electrode part is A capacitive deionization device formed to have a radius greater than or equal to the radius of the first reaction space and the second reaction space.

10. In paragraph 9, At least a portion of the first high-concentration channel connected to the first reaction space and the second low-concentration channel connected to the second reaction space, A capacitive deionization device in which the electrode portions are overlapped in the longitudinal direction of the case.

11. In any one of paragraphs 2 to 10, A first spacer in a mesh shape is inserted into the first reaction space, and a second spacer in a mesh shape is inserted into the second reaction space. A capacitive deionization device in which the first spacer has an uneven outer surface and is inserted into the first high-concentration channel, and the second spacer has an uneven outer surface and is inserted into the second high-concentration channel.

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