WO2024070570A1 - 電解槽 - Google Patents
電解槽 Download PDFInfo
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- WO2024070570A1 WO2024070570A1 PCT/JP2023/032721 JP2023032721W WO2024070570A1 WO 2024070570 A1 WO2024070570 A1 WO 2024070570A1 JP 2023032721 W JP2023032721 W JP 2023032721W WO 2024070570 A1 WO2024070570 A1 WO 2024070570A1
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- inlet
- outlet
- buffer
- electrolytic cell
- passage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46152—Electrodes characterised by the shape or form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4611—Fluid flow
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/46115—Electrolytic cell with membranes or diaphragms
Definitions
- the present invention relates to an electrolytic cell.
- electrolytic water generating devices have been known that have an electrolytic cell with an anode chamber and a cathode chamber separated by a partition, and that electrolyze raw water introduced into the electrolytic cell to generate electrolytic hydrogen water (see, for example, Patent Document 1).
- the electrolytic cell of the electrolytic water generating device disclosed in Patent Document 1 is a bipolar electrolytic cell made up of multiple stacked cells.
- the object of the present invention is therefore to provide an electrolytic cell with improved electrolytic performance in order to solve the above problems.
- the electrolytic cell disclosed herein is an electrolytic cell having a plurality of cells for electrolyzing water, each cell having a pair of electrodes, a pair of partition walls, and a pair of frames supporting the electrodes and the partition walls, the plurality of cells being a stacked body in which one electrode and one partition wall are alternately arranged, the electrolytic cell having a first inlet for introducing raw water into a first treatment space that houses a first electrode, a second inlet for introducing raw water into a second treatment space that houses a second electrode, a first outlet for discharging treated water that has passed through the first treatment space, a second outlet for discharging treated water that has passed through the second treatment space, a first inlet facing the first inlet, a second inlet facing the second inlet, a first outlet facing the first outlet, and a second outlet facing the second outlet, and further comprising a buffer inlet connected to the first inlet and the second inlet in the stacking direction of the stack.
- the electrolytic cell of the present invention can improve electrolysis performance.
- FIG. 1 is a perspective view of an electrolytic cell according to an embodiment
- FIG. 1 is a perspective view of an electrolytic cell according to an embodiment
- FIG. 1 is a front view of an electrolytic cell according to an embodiment
- FIG. 2 is an exploded perspective view of an electrolytic cell according to an embodiment.
- FIG. 2 is an exploded perspective view of an electrolytic cell according to an embodiment.
- FIG. 1 is a perspective view of a laminate according to an embodiment
- FIG. 2 is a perspective view of a cell constituting a laminate according to an embodiment
- FIG. 2 is a perspective view of a cell constituting a laminate according to an embodiment
- FIG. 2 is an exploded perspective view of a cell according to an embodiment.
- FIG. 2 is an exploded perspective view of a cell according to an embodiment.
- FIG. 2 is an exploded perspective view of a cell according to an embodiment.
- FIG. 1 is a longitudinal sectional view showing an internal cross section of a laminate according to an embodiment
- FIG. 2 is a perspective view showing a vertical cross section including a first inlet port and a second outlet port of an electrolytic cell in an embodiment.
- FIG. 2 is a perspective view showing a vertical cross section including a second inlet port and a first outlet port of the electrolytic cell in the embodiment.
- FIG. 2 is a schematic vertical cross-sectional view showing an enlarged view of the periphery of a first inlet and a first inlet in the embodiment
- FIG. 2 is a schematic vertical cross-sectional view showing an enlarged view of the periphery of a second inlet and a second inlet in the embodiment;
- FIG. 11 is a vertical cross-sectional view showing an end structure of a frame that forms a first inlet in the embodiment;
- FIG. 11 is a vertical cross-sectional view showing an end structure of a frame that forms a second inlet in the embodiment;
- FIG. 2 is a schematic vertical cross-sectional view showing an enlarged view of the periphery of a first outlet and a first outlet path in the embodiment;
- FIG. 2 is a schematic vertical cross-sectional view showing an enlarged view of the periphery of a second outlet port and a second outlet passage in the embodiment;
- FIG. 11 is a vertical cross-sectional view showing an end structure of a frame that forms a first outlet in the embodiment;
- FIG. 11 is a vertical cross-sectional view showing an end structure of a frame that forms a first outlet in the embodiment;
- FIG. 11 is a vertical cross-sectional view showing an end structure of a frame that forms a second outlet in the embodiment
- FIG. 13 is a vertical cross-sectional view showing an end structure of a frame forming an inlet according to a first modified example
- FIG. 13 is a vertical cross-sectional view showing an electrolytic cell according to a second modified example.
- an electrolytic cell having a plurality of cells for electrolyzing water, each cell having a pair of electrodes, a pair of partition walls, and a pair of frames supporting the electrodes and the partition walls, the plurality of cells being a stack of cells stacked so that one electrode and one partition wall are arranged alternately, the electrolytic cell having a first inlet for introducing raw water into a first treatment space accommodating a first electrode, a second inlet for introducing raw water into a second treatment space accommodating a second electrode, a first outlet for discharging treated water that has passed through the first treatment space, a second outlet for discharging treated water that has passed through the second treatment space, a first inlet facing the first inlet, a second inlet facing the second inlet, a first outlet facing the first outlet, and a second outlet facing the second outlet, and further comprising a buffer inlet connected to the first inlet and the second inlet in the stacking direction of the stack.
- the buffer inlet passage includes a first buffer inlet passage connected to the first inlet passage in the stacking direction, and a second buffer inlet passage connected to the second inlet passage in the stacking direction.
- an electrolytic cell according to the first or second aspect, in which the stack further comprises a first buffer outlet path connected to the first outlet path in the stacking direction, and a second buffer outlet path connected to the second outlet path in the stacking direction.
- an electrolytic cell according to the third aspect, further comprising a first case having the buffer inlet path and a second case having the first buffer outlet path and the second buffer outlet path, the first case and the second case being attached to the stack.
- an electrolytic cell according to the fourth aspect, in which the first case is attached to a first main surface of the laminate, and the second case is attached to a second main surface of the laminate that faces the first main surface.
- an electrolytic cell according to any one of the first to fifth aspects, in which a first direction from the first inlet to the first outlet and a second direction from the second inlet to the second outlet intersect with each other when viewed along the stacking direction.
- an electrolytic cell according to any one of the first to sixth aspects, in which the first inlet passage, the second inlet passage, the first outlet passage and the second outlet passage each extend in the stacking direction.
- an electrolytic cell according to any one of the first to seventh aspects, in which the end of the electrode at the inlet of the stack is located closer to the center of the stack than the end of the frame that constitutes the inlet.
- an electrolytic cell according to any one of the first to eighth aspects, further comprising an inlet port communicating with the buffer inlet passage, the cross-sectional area of the buffer inlet passage being greater than the cross-sectional area of the internal flow path of the inlet port.
- an electrolytic cell according to any one of the first to ninth aspects, in which the inlet has a plurality of inlets spaced apart in the stacking direction, the ends of the frame constituting the plurality of inlets have a first end having a first R shape and a second end located downstream of the first end and having a second R shape, and the radius of curvature of the first R shape is greater than the radius of curvature of the second R shape.
- an electrolytic cell according to any one of the first to tenth aspects, in which the inlet has a plurality of inlets spaced apart in the stacking direction, the ends of the frame constituting the plurality of inlets have a first end having a first inclined surface and a second end located downstream of the first end and having a second inclined surface, and the inclination angle of the first inclined surface is greater than the inclination angle of the second inclined surface.
- an electrolytic cell according to any one of the first to eleventh aspects, in which an obstacle is inserted in the downstream region of the first inlet passage or the second inlet passage of the stack.
- FIGS. 1 to 5 are diagrams showing an electrolytic cell 2 according to an embodiment of the present invention.
- Figures 1 and 2 are perspective views of the electrolytic cell 2
- Figure 3 is a front view of the electrolytic cell 2
- Figures 4 and 5 are exploded perspective views of the electrolytic cell 2.
- the electrolytic cell 2 shown in Figures 1 to 5 is an electrolytic water generating device that electrolyzes raw water such as hard water to generate alkaline water and hydrogen water (treated water).
- Hard water is defined as water with a hardness of 120 mg/L or more, for example.
- the electrolytic cell 2 shown in Figures 1 to 5 has a stack 4 formed by stacking multiple cells 34 ( Figures 6 to 8) in a stacking direction ST, and is a so-called bipolar electrolytic cell.
- the electrolytic cell 2 shown in Figures 1 to 3 includes a laminate 4 and a first case 6 and a second case 8 attached to the laminate 4.
- the stack 4 is composed of multiple cells 34 (Figs. 6 to 8), has multiple flow paths inside, and incorporates an anode chamber/cathode chamber (treatment spaces S1, S2 described below) for electrolyzing raw water.
- a first case 6 and a second case 8 are arranged on both sides of the stack 4.
- Cases 6 and 8 are components that protect the laminate 4 and form flow paths that communicate with the interior of the laminate 4.
- the first case 6 is attached to the first main surface 4A ( Figure 4) of the laminate 4
- the second case 8 is attached to the second main surface 4B ( Figure 5) of the laminate 4.
- the first case 6 has a first inlet port 10 and a second inlet port 12 as two ports for introducing raw water into the stack 4.
- the second case 8 has a first outlet port 14 and a second outlet port 16 as two ports for discharging treated water (alkaline water/acidic water) produced by electrolysis to the outside.
- raw water (arrow A1) flowing in from the first inlet port 10 is electrolyzed as it passes through the interior of the laminate 4 to become alkaline water or acidic water, and flows out from the first outlet port 14 (arrow A2).
- raw water (arrow B1) flowing in from the second inlet port 12 is electrolyzed as it passes through the internal flow path of the laminate 4 to become acidic water or alkaline water, and flows out from the second outlet port 16 (arrow B2).
- the laminate 4 has a first inlet passage 18, a second inlet passage 20, a first outlet passage 22, and a second outlet passage 24 as internal flow paths.
- the first inlet passage 18 is a flow path connected to the first inlet port 10, and passes the raw water flowing in from the first inlet port 10 through the treatment space of the stack 4.
- the first inlet passage 18 is connected to the first outlet passage 22 through the treatment space of the stack 4.
- the second inlet passage 20 is a flow path connected to the second inlet port 12, and passes the raw water flowing in from the second inlet port 12 through the treatment space of the stack 4.
- the second inlet passage 20 is connected to the second outlet passage 24 through the treatment space of the stack 4.
- the first case 6 has a first buffer inlet passage 26 and a second buffer inlet passage 28 as internal flow paths.
- the first buffer inlet passage 26 is a flow path that communicates with the first inlet port 10, and communicates with the first inlet passage 18 of the stack 4 when the stack 4 and the first case 6 are attached.
- the second buffer inlet passage 28 is a flow path that communicates with the second inlet port 12, and communicates with the second inlet passage 20 of the stack 4 when the stack 4 and the first case 6 are attached.
- the first buffer inlet passage 26 has a larger flow passage cross-sectional area than the internal flow passage of the first inlet port 10, and functions as a buffer space.
- the second buffer inlet passage 28 has a larger flow passage cross-sectional area than the internal flow passage of the second inlet port 12, and functions as a buffer space.
- the second case 8 has a first buffer outflow path 30 and a second buffer outflow path 32 as internal flow paths.
- the first buffer outflow path 30 is a flow path that communicates with the first outflow port 14, and communicates with the first outflow path 22 of the stack 4 when the stack 4 and the second case 8 are attached.
- the second buffer outflow path 32 is a flow path that communicates with the second outflow port 16, and communicates with the second outflow path 24 of the stack 4 when the stack 4 and the second case 8 are attached.
- the first buffer outflow passage 30 has a larger flow cross-sectional area than the internal flow passage of the first outflow port 14 and functions as a buffer space
- the second buffer outflow passage 32 has a larger flow cross-sectional area than the internal flow passage of the second outflow port 16 and functions as a buffer space.
- buffer inlet channels 26, 28 upstream of the treatment space of the stack 4 and also providing a buffer space (buffer outlet channels 30, 32) downstream
- buffer space buffer outlet channels 30, 32
- the entire internal flow path of the stack 4 can be rectified, making it easier to flow a roughly constant amount of water into and out of each cell 34. This reduces the variation in flow rate between the multiple cells 34, equalizes the flow rate of water flowing inside the stack 4, and improves the electric field performance of the electrolytic cell 2.
- FIG. 6 is a perspective view showing the laminate 4.
- FIGS. 7 and 8 are perspective views showing one cell 34 that constitutes the laminate 4.
- the laminate 4 is formed by stacking a plurality of cells 34 in the stacking direction ST, and in this embodiment, an example is shown in which the laminate has five cells 34. However, this is not the only case, and the number of cells 34 may be any number as long as it is more than one.
- a plurality of first terminals 38 and a plurality of second terminals 40 are exposed on one side surface 36 of the laminate 4.
- the first terminals 38 are terminals of a first electrode 46 (Figs. 9 and 10) built into the laminate 4
- the second terminals 40 are terminals of a second electrode 48 (Figs. 9 and 10) built into the laminate 4.
- a voltage application member (not shown) is connected to each of the first terminals 38 and the second terminals 40, and a voltage with reversed positive and negative polarities is applied to each of them.
- the electrode to which a positive voltage is applied functions as an anode
- the electrode to which a negative voltage is applied functions as a cathode.
- Figures 9 and 10 are exploded perspective views of cell 34.
- Each cell 34 includes a first frame 42, a second frame 44, a first electrode 46, a second electrode 48, a first partition 47, and a second partition 49.
- the first electrode 46, the first frame 42, the second electrode 48, and the second frame 44 are stacked and attached in this order in the stacking direction ST to form one cell 34 as shown in Figures 7 and 8. Sealing packing is provided at the points where the frames 42, 44 and the electrodes 46, 48 come into contact with each other.
- the frames 42 and 44 are members that support the electrodes 46 and 48 and the partition walls 47 and 49, respectively.
- the frames 42 and 44 each support the partition walls 47 and 49 on the inside, and also sandwich and support one of the electrodes 46 and 48.
- the first electrode 46 is an electrode having the first terminal portion 38 described above, and is supported by being sandwiched between the first frame 42 and the second frame 44.
- the second electrode 48 is an electrode having the second terminal portion 40 described above, and is supported by being sandwiched between the first frame 42 and the second frame 44.
- the first partition 47 is a wall attached to the inside of the first frame 42 and is disposed between the adjacent first electrode 46 and second electrode 48.
- the second partition 49 is a wall attached to the inside of the second frame 44 and is disposed between the adjacent first electrode 46 and second electrode 48. Both partitions 47, 49 have the function of isolating the first processing space S1 in which the first electrode 46 is disposed, from the second processing space S2 in which the second electrode 48 is disposed, and are composed of an ion exchange membrane, allowing the passage of cations and anions.
- a stack 4 is formed in which a first processing space S1 that houses a first electrode 46 and a second processing space S2 that houses a second electrode 48 (i.e., an anode chamber and a cathode chamber) are arranged alternately.
- FIG. 11 is a vertical cross-sectional view that shows a schematic internal cross-section of laminate 4.
- one of the electrodes 46, 48 and one of the partitions 47, 49 are arranged alternately along the stacking direction ST, and the first processing space S1 and the second processing space S2 are also arranged alternately while being isolated from each other by the partitions 47, 49.
- water flows upward on the paper in Figure 11 see arrows A3, B3, and electrolysis occurs as it flows through the processing spaces S1, S2.
- Alkaline water is produced in one processing space, and acidic water is produced in the other processing space, and is sent upward as treated water.
- a flow path is formed diagonally upward from the first inlet passage 18 toward the first outlet passage 22 (arrow A3).
- a flow path is formed diagonally upward from the second inlet passage 20 toward the second outlet passage 24 (arrow B3).
- FIG. 12 is a perspective view showing a vertical cross section including the first inlet port 10 and the second outlet port 16 in the electrolytic cell 2.
- FIG. 13 is a perspective view showing a vertical cross section including the second inlet port 12 and the first outlet port 14 in the electrolytic cell 2.
- the first inlet port 10 and the second outlet port 16 are shown in the same cross section, but the first inlet port 10 and the second outlet port 16 are not connected to each other.
- the second inlet port 12 and the first outlet port 14 are shown in the same cross section, but the second inlet port 12 and the first outlet port 14 are not connected to each other.
- the first inlet port 10 shown in FIG. 12 is connected to the first outlet port 14 shown in FIG. 13, and the second inlet port 12 shown in FIG. 13 is connected to the second outlet port 16 shown in FIG. 12.
- the internal flow path 10A of the first inlet port 10 extends in the height direction H of the electrolytic cell 2, communicates with the first buffer inlet 26, and is connected to the first inlet 18 along the stacking direction ST of the stack 4.
- the first inlet 18 faces a plurality of first inlets 50 inside the stack 4.
- the internal flow path 12A of the second inlet port 12 extends in the height direction H of the electrolytic cell 2, communicates with the second buffer inlet 28, and is connected to the second inlet 20 along the stacking direction ST of the stack 4.
- the second inlet 20 faces multiple second inlets 52 inside the stack 4.
- FIG. 14 is a schematic vertical cross-sectional view showing an enlarged view of the first inlet passage 18 and the surrounding area of the multiple first inlets 50 shown in FIG. 12.
- the first inlets 50 facing the first inlet passage 18 are openings for allowing the raw water flowing through the first inlet passage 18 to flow into the upper first treatment space S1, and are arranged at intervals in the stacking direction ST.
- the first treatment space S1 functions as an anode chamber or a cathode chamber depending on whether the voltage applied to the first electrode 46 is positive or negative.
- FIG. 15 is a schematic vertical cross-sectional view showing an enlarged view of the second inlet passage 20 and the surrounding area of the multiple second inlets 52 shown in FIG. 13.
- the second inlets 52 facing the second inlet 20 are openings for allowing the raw water flowing through the second inlet 20 to flow into the upper second treatment space S2, and are arranged at intervals in the stacking direction ST.
- the second treatment space S2 functions as an anode chamber or a cathode chamber depending on whether the voltage applied to the second electrode 48 is positive or negative.
- Figure 16 is a vertical cross-sectional view that shows a schematic of the end structure of the frames 42, 44 that form the first inlet 50.
- Figure 17 is a vertical cross-sectional view that shows a schematic of the end structure of the frames 42, 44 that form the second inlet 52.
- the first frame 42 has an end 60 facing the first inlet 18, and the second frame 44 has an end 62 facing the first inlet 18.
- One first inlet 50 is formed between the two ends 60, 62, and multiple first inlets 50 are formed along the water flow direction W.
- the end 60 has an inclined surface 60A that is inclined with respect to the stacking direction ST, and the end 62 has a gently curved R-shape 62A.
- the flow of water from the first inlet 18 to the first inlet 50 becomes smoother.
- the ease with which water flows into the first inlet 50 can also be adjusted by changing the inclination angle of the inclined surface 60A and the curvature of the R-shape 62A.
- the end 46A of the first electrode 46 at the first inlet 50 is positioned closer to the center of the laminate 4 (see arrow C1) than the ends 60, 62 of the frames 42, 44 that constitute the first inlet 50. This positional relationship makes it possible to increase the area of the first electrode 46 while preventing the first electrode 46 from impeding the flow of water from the first inlet 18 to the first inlet 50.
- the first frame 42 has an end 64 facing the second inlet 20
- the second frame 44 has an end 66 facing the second inlet 20.
- One second inlet 52 is formed between the two ends 64, 66, and multiple second inlets 52 are formed along the water flow direction W.
- the end 64 has a gently curved R-shape 64A
- the end 66 has an inclined surface 66A that is inclined with respect to the stacking direction ST.
- end 48A of the second electrode 48 at the second inlet 52 is positioned closer to the center of the laminate 4 (see arrow C2) than the ends 64, 66 of the frames 42, 44 that constitute the second inlet 52.
- the same vertical section as the first inlet port 10 includes the second outlet port 16. As shown in FIG. 13, the same vertical section as the second inlet port 12 includes the first outlet port 14.
- a plurality of first outlets 68 are provided above the second inlet 52.
- the plurality of first outlets 68 are not connected to the second inlet 52, but are connected to the first inlet 50 shown in FIG. 12 through the first processing space S1 so as to form an oblique flow path inside the stack 34.
- the plurality of first outlets 68 face the first outlet path 22 described above, and are connected to the first buffer outlet path 30 and the internal flow path 14A of the first outlet port 14 along the stacking direction ST through the first outlet path 22.
- a plurality of second outlets 70 are provided above the first inlet 50.
- the plurality of second outlets 70 are not connected to the first inlet 50, but are connected to the second inlet 52 shown in FIG. 13 through the second processing space S2 so as to form an oblique flow path inside the stack 34.
- the plurality of second outlets 70 face the second outlet path 24 described above, and are connected to the second buffer outlet path 32 and the internal flow path 16A of the second outlet port 16 along the stacking direction ST through the second outlet path 24.
- Figure 18 is a schematic vertical cross-sectional view showing an enlarged view of the multiple first outlets 68 and the periphery of the first outlet path 22 shown in Figure 13.
- the first outlets 68 facing the first outlet path 22 are openings for allowing the treated water that has passed through the first treatment space S1 to flow into the first outlet path 22, and multiple first outlets 68 are arranged at intervals in the stacking direction ST.
- FIG. 19 is a schematic vertical cross-sectional view showing an enlarged view of the multiple second outlets 70 and the periphery of the second outlet path 24 shown in FIG. 12.
- the second outlets 70 facing the second outlet path 24 are openings for allowing the treated water that has passed through the second treatment space S2 to flow into the second outlet path 24, and multiple second outlets 70 are arranged at intervals in the stacking direction ST.
- Figure 20 is a vertical cross-sectional view that shows a schematic diagram of the end structure of the frames 42, 44 that form the first outlet 68.
- the first frame 42 has an end 72 facing the first outlet passage 22, and the second frame 44 has an end 74 facing the first outlet passage 22.
- a first outlet 68 is formed between the two ends 72, 74.
- the end 72 has an inclined surface 72A inclined with respect to the stacking direction ST, and the end 74 of the second frame 44 has a gently curved R-shape 74A.
- Figure 21 is a vertical cross-sectional view that shows a schematic diagram of the end structure of the frames 42, 44 that form the second outlet 70.
- the first frame 42 has an end 76 facing the second outlet passage 24, and the second frame 44 has an end 78 facing the second outlet passage 24.
- a second outlet 70 is formed between the two ends 76, 78.
- the end 76 has a gently curved R-shape 76A
- the end 78 of the second frame 44 has an inclined surface 78A inclined with respect to the stacking direction ST.
- the flow rate of water flowing from the outlets 68, 70 to the outlet channels 22, 24 can be adjusted by changing the inclination angle of the inclined surfaces 72A, 78A and the curvature of the R-shapes 74A, 76A.
- the end 46B of the first electrode 46 at the first outlet 68 is positioned closer to the center of the stack 4 (see arrow C3) than the ends 72, 74 of the frames 42, 44 that constitute the first outlet 68.
- the end 48B of the second electrode 48 at the second outlet 70 is positioned closer to the center of the stack 4 (see arrow C4) than the ends 76, 78 of the frames 42, 44 that constitute the second outlet 70.
- raw water is introduced from a raw water source (not shown) through the inlet ports 10 and 12 while a positive or negative voltage is applied to the first electrode 46 through the first terminal 38 and a negative or positive voltage is applied to the second electrode 48 through the second terminal 40.
- the first treatment space S1 housing the first electrode 46 functions as an anode chamber or a cathode chamber
- the second treatment space S2 housing the second electrode 48 functions as a cathode chamber or an anode chamber
- the raw water is electrolyzed in each of the treatment spaces S1 and S2 to produce alkaline water or acidic water as treated water.
- the produced treated water is discharged to the outside from the outlet ports 14 and 16, respectively.
- the raw water flowing in from the inlet ports 10, 12 flows through the internal flow paths 10A, 12A and then flows into the buffer inlet paths 26, 28.
- the flow of the raw water can be rectified before it is electrolyzed in the treatment spaces S1, S2. This makes it difficult for variation in the flow rate of the inflow on the upstream and downstream sides to occur, even when multiple inlets 50, 52 are provided along the water flow direction. This makes it possible to suppress variation in the flow rate in multiple cells 34, and improve the electrolysis performance of the electrolytic cell 2.
- buffer outflow paths 30, 32 are also provided on the downstream side of the processing spaces S1, S2. This allows the entire internal flow path of the stack 4 to be rectified, further suppressing the variation in flow rate between the multiple cells 34, and further improving the electrolysis performance of the electrolytic cell 2.
- the buffer outlet channels 30, 32 which are the downstream buffer channels, only need to have a larger flow cross-sectional area than the internal flow channels 14A, 16A of the outlet ports 14, 16, respectively.
- the buffer inlet channels 26, 28 have approximately the same flow cross-sectional area as the inlet channels 18, 20, respectively, but may have different flow cross-sectional areas.
- the buffer outlet channels 30, 32 have approximately the same flow cross-sectional area as the outlet channels 22, 24, respectively, but may have different flow cross-sectional areas.
- the electrolytic cell 2 of this embodiment is an electrolytic cell including a plurality of cells 34 for electrolyzing water, and each cell 34 has a pair of electrodes 46, 48, a pair of partition walls 47, 49, and a pair of frames 42, 44 supporting the electrodes 46, 48 and the partition walls 47, 49.
- the plurality of cells 34 is a stack 4 in which the electrodes 46, 48 and the partition walls 47, 49 are alternately stacked.
- the plurality of cells 34 has a first inlet 50 for allowing raw water to flow into a first treatment space S1 that accommodates a first electrode 46, a second inlet 52 for allowing raw water to flow into a second treatment space S2 that accommodates a second electrode 48, a first outlet 68 for allowing treated water that has passed through the first treatment space S1 to flow out, and a second outlet 70 for allowing treated water that has passed through the second treatment space S2 to flow out.
- the plurality of cells 34 further have a first inflow channel 18 facing the first inlet 50, a second inflow channel 20 facing the second inlet 52, a first outflow channel 22 facing the first outlet 68, and a second outflow channel 24 facing the second outlet 70.
- buffer inflow channels 26, 28 connected to the first inflow channel 18 and the second inflow channel 20 in the stacking direction ST of the stack 4 are further provided.
- buffer inlet channels 26, 28 that function as buffer spaces allows the flow of water to be rectified upstream of the treatment spaces S1, S2. This reduces the variation in flow rate between the multiple cells 34, and improves the electrolysis performance of the electrolysis cell 2.
- the buffer inlet channels 26, 28 include a first buffer inlet channel 26 connected to the first inlet channel 18 in the stacking direction ST, and a second buffer inlet channel 28 connected to the second inlet channel 20 in the stacking direction ST.
- the stack 4 further includes a first buffer outlet 30 connected to the first outlet 22 in the stacking direction ST, and a second buffer outlet 32 connected to the second outlet 24 in the stacking direction ST.
- the electrolytic cell 2 of this embodiment further includes a first case 6 having buffer inflow paths 26, 28 and a second case 8 having buffer outflow paths 30, 32, and the first case 6 and the second case 8 are attached to the stack 4.
- the cases 6, 8 can form a buffer flow path and protect the electrolytic cell 2.
- the first case 6 is attached to the first main surface 4A of the laminate 4
- the second case 8 is attached to the second main surface 4B opposite the first main surface 4A of the laminate 4.
- the first direction A3 from the first inlet 50 to the first outlet 68 and the second direction B3 from the second inlet 52 to the second outlet 70 intersect with each other when viewed along the stacking direction ST.
- the first direction A3 and the second direction B3 do not intersect, it becomes easier to flow water over the entire electrode surface while keeping the area of the electrodes 46, 48 large, leading to improved electrolysis performance.
- the first inlet passage 18, the second inlet passage 20, the first outlet passage 22, and the second outlet passage 24 each extend in the stacking direction ST.
- the first inlet passage 18, the second inlet passage 20, the first outlet passage 22, and the second outlet passage 24, as well as the buffer inlet passages 26, 28/buffer outlet passages 30, 32 all extend in the stacking direction ST, making it easier to straighten the water flowing inside the stack 4, leading to improved electrolysis performance.
- the ends 46A, 48A of the electrodes 46, 48 at the inlets 50, 52 of the stack 4 are located closer to the center of the stack 4 than the ends 60, 62, 64, 66 of the frames 42, 44 that form the inlets 50, 52.
- the ends 46A, 48A of the electrodes 46, 48 are located closer to the center than the ends 60, 62, 64, 66 of the frames 42, 44, respectively, making it possible to prevent the flow of water flowing from the inlets 50, 52 into the treatment spaces S1, S2 from being obstructed. This makes it possible to suppress a decrease in the flow rate.
- the electrolytic cell 2 of this embodiment further includes inlet ports 10, 12 that communicate with the buffer inlet channels 26, 28, and the cross-sectional area of the buffer inlet channels 26, 28 is larger than the cross-sectional area of the internal flow paths 10A, 12A of the inlet ports 10, 12. This configuration enhances the straightening effect of the buffer inlet channels 26, 28, leading to uniform flow rates.
- the buffer inflow paths 26, 28 are connected to the inflow paths 18, 20, respectively, but the invention is not limited to this case.
- a common buffer inflow path may be provided that connects to both the inflow paths 18, 20.
- the inflow ports 10, 12 may be integrated into one common inflow port.
- the buffer inflow paths 26, 28 and the buffer outflow paths 30, 32 are provided, but the invention is not limited to this case, and the buffer outflow paths 30, 32 may be omitted and only the buffer inflow paths 26, 28 may be provided.
- the shapes of the ends 60, 62 of the frames 42, 44 that make up the inlets 50, 52 are the same, but this is not the only case.
- the shape of the frame ends may be changed along the water flow direction W, as in the modified example shown in Figure 22.
- FIG. 22 is a vertical cross-sectional view that shows a schematic diagram of the end structure of the frames 42, 44 that form the first inlet 50 in the first modified example.
- the frames 42, 44 have ends 60, 62 on the upstream side and ends 160, 162 on the downstream side along the water flow direction W.
- the inclined surface 160A of the end 160 is set at a shallower angle with respect to the stacking direction ST than the inclined surface 60A of the end 60, and the R-shape 162A of the end 162 is set to have a smaller radius of curvature than the R-shape 62A of the end 62.
- the shapes of the ends 60, 62, 160, 162 shown in Fig. 22 may also be applied to the shapes of the ends 64, 66 of the frames 42, 44 that constitute the second inlet 52 shown in Fig. 17. They may also be applied to the ends 72, 74, 76, 78 of the frames 42, 44 that constitute the outlets 68, 70 shown in Figs. 20 and 21.
- the radius of curvature of the R-shape of the end located downstream may be made smaller than that of the end located upstream, and the inclination angle of the inclined surface with respect to the stacking direction ST may be made shallower.
- the shape of the other one may be left unchanged and remain the same along the water flow direction W.
- the R-shape and the shape of the inclined surface may be changed at any point, for example, the shape may be changed in stages.
- the inlet 50 has multiple inlets spaced apart in the stacking direction ST, and the ends 62, 162 of the frames 42, 44 constituting the multiple inlets 50 have a first end 62 having a first R shape 62A and a second end 162 located downstream of the first end 62 and having a second R shape 162A, and the radius of curvature of the first R shape 62A is larger than the radius of curvature of the second R shape 162A.
- the inlet 50 has multiple inlets spaced apart in the stacking direction ST, and the ends 60, 160 of the frames 42, 44 constituting the multiple inlets 50 have a first end 60 having a first inclined surface 60A and a second end 160 located downstream of the first end 60 and having a second inclined surface 160A, and the inclination angle of the first inclined surface 60A is greater than the inclination angle of the second inclined surface 160A. This makes it possible to uniform the flow rate and improve the electrolysis performance.
- FIG. 23 is a schematic diagram showing a vertical cross section of an electrolytic cell 200 according to Modification 2.
- a first obstacle 202 is arranged in the inflow channels 18 and 20, and a second obstacle 204 is arranged in the outflow channels 22 and 24.
- the first obstacle 202 is provided at a downstream position along the water flow direction W1 in the inflow channels 18 and 20, and the second obstacle 204 is provided at an upstream position along the water flow direction W2 in the outflow channels 22 and 24.
- the first obstacle 202 has a tapered shape tapering in the opposite direction to the water flow direction W1, and the second obstacle 204 has a tapered shape tapering in the water flow direction W2.
- a first obstacle 202 is inserted in the downstream region of the first inlet passage 18 or the second inlet passage 20 of the stack 4, and a second obstacle 204 is inserted in the upstream region of the first outlet passage 22 or the second outlet passage 24 of the stack 4. This makes it possible to make the flow rate uniform and improve the electrolysis performance.
- the present invention is useful for electrolytic cells having multiple cells for electrolyzing water.
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Abstract
Description
図1~図5はそれぞれ、実施形態における電解槽2を示す図である。図1、図2は、電解槽2の斜視図であり、図3は、電解槽2の正面図であり、図4、図5は、電解槽2の分解斜視図である。
上述したように、本実施形態の電解槽2は、水を電気分解するための複数のセル34を備えた電解槽であって、各セル34は、一対の電極46、48と、一対の隔壁47、49と、電極46、48および隔壁47、49を支持する一対のフレーム42、44とを有する。複数のセル34は、電極46、48の1つと隔壁47、49の1つが交互に並ぶように積層される積層体4である。複数のセル34は、第1電極46を収容する第1処理空間S1に原水を流入させる第1流入口50と、第2電極48を収容する第2処理空間S2に原水を流入させる第2流入口52と、第1処理空間S1を通過した処理水を流出させる第1流出口68と、第2処理空間S2を通過した処理水を流出させる第2流出口70とを有する。複数のセル34はさらに、第1流入口50に面する第1流入路18と、第2流入口52に面する第2流入路20と、第1流出口68に面する第1流出路22と、第2流出口70に面する第2流出路24と、を有する。当該構成において、第1流入路18および第2流入路20に対して積層体4の積層方向STに接続されるバッファ流入路26、28をさらに設けた。
4 積層体
6 第1ケース
8 第2ケース
10 第1流入ポート
12 第2流入ポート
14 第1流出ポート
16 第2流出ポート
18 第1流入路
20 第2流入路
22 第1流出路
24 第2流出路
26 第1バッファ流入路
28 第2バッファ流入路
30 第1バッファ流出路
32 第2バッファ流出路
34 セル
42 第1フレーム
44 第2フレーム
46 第1電極
47 第1隔壁
48 第2電極
49 第2隔壁
50 第1流入口
52 第2流入口
68 第1流出口
70 第2流出口
ST 積層方向
Claims (12)
- 水を電気分解するための複数のセルを備えた電解槽であって、
各セルは、一対の電極と、一対の隔壁と、前記電極および前記隔壁を支持する一対のフレームとを有し、
前記複数のセルは、1つの前記電極と1つの前記隔壁が交互に並ぶように積層される積層体であって、第1電極を収容する第1処理空間に原水を流入させる第1流入口と、第2電極を収容する第2処理空間に原水を流入させる第2流入口と、前記第1処理空間を通過した処理水を流出させる第1流出口と、前記第2処理空間を通過した処理水を流出させる第2流出口と、前記第1流入口に面する第1流入路と、前記第2流入口に面する第2流入路と、前記第1流出口に面する第1流出路と、前記第2流出口に面する第2流出路と、を有し、
前記第1流入路および前記第2流入路に対して前記積層体の積層方向に接続されるバッファ流入路をさらに設けた、
電解槽。 - 前記バッファ流入路は、前記第1流入路に対して前記積層方向に接続される第1バッファ流入路と、前記第2流入路に対して前記積層方向に接続される第2バッファ流入路と、を含む、請求項1に記載の電解槽。
- 前記積層体は、前記第1流出路に対して前記積層方向に接続される第1バッファ流出路と、前記第2流出路に対して前記積層方向に接続される第2バッファ流出路と、をさらに備える、請求項1に記載の電解槽。
- 前記バッファ流入路を有する第1ケースと、
前記第1バッファ流出路および前記第2バッファ流出路を有する第2ケースと、をさらに備え、
前記第1ケースと前記第2ケースは、前記積層体に取り付けられる、請求項3に記載の電解槽。 - 前記第1ケースは、前記積層体の第1主面に取り付けられ、前記第2ケースは、前記積層体の前記第1主面に対向する第2主面に取り付けられる、請求項4に記載の電解槽。
- 前記第1流入口から前記第1流出口に向かう第1方向と、前記第2流入口から前記第2流出口に向かう第2方向は、前記積層方向に沿って見たときに互いに交差する、請求項1に記載の電解槽。
- 前記第1流入路、前記第2流入路、前記第1流出路および前記第2流出路はそれぞれ、前記積層方向に延びる、請求項1に記載の電解槽。
- 前記積層体の前記流入口における前記電極の端部は、前記流入口を構成する前記フレームの端部よりも前記積層体の中心に近い位置にある、請求項1に記載の電解槽。
- 前記バッファ流入路に通じる流入ポートをさらに備え、
前記バッファ流入路の断面積は、前記流入ポートの内部流路の断面積よりも大きい、請求項1に記載の電解槽。 - 前記流入口は、前記積層方向に間隔を空けて複数の流入口を有し、
前記複数の流入口を構成する前記フレームの端部は、第1R形状を有する第1端部と、前記第1端部よりも下流側に位置し、第2R形状を有する第2端部とを有し、前記第1R形状の曲率半径は、前記第2R形状の曲率半径よりも大きい、請求項1に記載の電解槽。 - 前記流入口は、前記積層方向に間隔を空けて複数の流入口を有し、
前記複数の流入口を構成する前記フレームの端部は、第1傾斜面を有する第1端部と、前記第1端部よりも下流側に位置し、第2傾斜面を有する第2端部とを有し、前記第1傾斜面の傾斜角度は、前記第2傾斜面の傾斜角度よりも大きい、請求項1に記載の電解槽。 - 前記積層体の前記第1流入路あるいは前記第2流入路の下流側の領域に障害物を挿入した、請求項1に記載の電解槽。
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| CN202380065043.5A CN119907778A (zh) | 2022-09-30 | 2023-09-07 | 电解槽 |
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| JP2025166457A (ja) * | 2024-04-24 | 2025-11-06 | 株式会社堤水素研究所 | 水電解装置 |
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| JPS63199888A (ja) * | 1987-02-14 | 1988-08-18 | Asahi Glass Co Ltd | 単極型電解槽プラント |
| JP2006087987A (ja) * | 2004-09-21 | 2006-04-06 | Enagic Co Ltd | 電解槽及びそれを用いる電解水生成装置 |
| JP2013173995A (ja) * | 2012-02-27 | 2013-09-05 | Vantec:Kk | 電解室構造、電解セルユニット、電解セルスタック及び水素発生装置 |
| WO2018139613A1 (ja) * | 2017-01-26 | 2018-08-02 | 旭化成株式会社 | 複極式エレメント、複極式電解槽、水素製造方法 |
| WO2018174281A1 (ja) * | 2017-03-23 | 2018-09-27 | 旭化成株式会社 | 水電解システム、水電解方法、水素の製造方法 |
| JP2021195596A (ja) | 2020-06-15 | 2021-12-27 | 旭化成株式会社 | アルカリ水電解槽 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2487247B (en) * | 2011-01-17 | 2017-04-12 | Oceansaver As | Water treatment |
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- 2023-09-07 EP EP23871808.4A patent/EP4596505A4/en active Pending
- 2023-09-07 CN CN202380065043.5A patent/CN119907778A/zh active Pending
- 2023-09-07 WO PCT/JP2023/032721 patent/WO2024070570A1/ja not_active Ceased
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| JPS63199888A (ja) * | 1987-02-14 | 1988-08-18 | Asahi Glass Co Ltd | 単極型電解槽プラント |
| JP2006087987A (ja) * | 2004-09-21 | 2006-04-06 | Enagic Co Ltd | 電解槽及びそれを用いる電解水生成装置 |
| JP2013173995A (ja) * | 2012-02-27 | 2013-09-05 | Vantec:Kk | 電解室構造、電解セルユニット、電解セルスタック及び水素発生装置 |
| WO2018139613A1 (ja) * | 2017-01-26 | 2018-08-02 | 旭化成株式会社 | 複極式エレメント、複極式電解槽、水素製造方法 |
| WO2018174281A1 (ja) * | 2017-03-23 | 2018-09-27 | 旭化成株式会社 | 水電解システム、水電解方法、水素の製造方法 |
| JP2021195596A (ja) | 2020-06-15 | 2021-12-27 | 旭化成株式会社 | アルカリ水電解槽 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2025166457A (ja) * | 2024-04-24 | 2025-11-06 | 株式会社堤水素研究所 | 水電解装置 |
| JP7795218B2 (ja) | 2024-04-24 | 2026-01-07 | 株式会社堤水素研究所 | 水電解装置 |
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| JPWO2024070570A1 (ja) | 2024-04-04 |
| CN119907778A (zh) | 2025-04-29 |
| EP4596505A4 (en) | 2025-11-26 |
| EP4596505A1 (en) | 2025-08-06 |
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