Electrolytic cell unit

Abstract

The utility model provides an electrolytic cell unit capable of preventing an anode or a current collector from collapsing towards an electrode chamber side. The electrolytic cell unit (2) is provided with electrode chambers (4) (an anode chamber (8), a cathode chamber (10)) for electrolyzing a liquid. The electrolytic cell unit (2) is provided with: an anode (14) disposed in the anode chamber (8); a current collector (20) disposed in the cathode chamber (10); a partition wall (16) that partitions the anode chamber (8) and the cathode chamber (10); and a flange (28) that defines both ends and a lower end of the anode chamber (8) in the width direction. The flange (28) is provided with a protrusion (34) that protrudes toward the anode chamber (8) and extends along the inner periphery of the flange (28), and at least one of both ends (14b) and a lower end (14c) of the anode (14) in the width direction is supported by the protrusion (34).

Description

Technical Field

[0001] This utility model relates to an electrolytic cell unit, and more specifically, to an electrolytic cell unit in which electrodes are supported on a protrusion extending along the inner circumference of a flange. Background Technology

[0002] An electrolytic cell unit is a component of a bipolar electrolytic cell used for electrolyzing aqueous solutions of alkali metal chlorides, such as brine, or aqueous solutions of alkali metal hydroxides, such as potassium hydroxide. An electrolytic cell unit typically includes an anode chamber and a cathode chamber, which are separated by a partition wall. An anode is disposed in the anode chamber and is supported by ribs within the anode chamber. A current collector is disposed in the cathode chamber and is supported by ribs within the cathode chamber (see, for example, Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2023-177353 Utility Model Content

[0006] Problems to be solved by utility models

[0007] However, there is a situation where, due to pressure fluctuations within the electrolytic cell, the two sides or lower end of the anode or current collector collapses towards the electrode chamber side, losing its flatness. In this case, there is a possibility of localized increase in resistance, an increase in electrolytic voltage, or membrane damage (in the case of electrolysis of alkali metal chloride aqueous solutions such as salt electrolysis, it is an ion exchange membrane; in the case of electrolysis of alkali metal hydroxides such as potassium hydroxide, it is a diaphragm). Here, "collapse" means that the position of at least one of the side and lower ends of the anode or current collector shifts towards the electrode chamber side during operation compared to the position of its respective main portion before the electrolytic cell unit began operation (initial state). Furthermore, even if the tip of the side or lower end of the anode or current collector is at the same position as the main portion of the anode or current collector in the depth direction, it includes situations where, during operation, a localized depression or bend occurs towards the electrode chamber side other than the tip of the anode or current collector. Moreover, it also includes situations where, during the operation of the electrolytic cell unit, localized displacement of the side or lower end of the anode or current collector towards the electrode chamber side occurs.

[0008] The present invention addresses the issue of providing an electrolytic cell unit that prevents the anode or current collector from collapsing toward the electrode chamber side.

[0009] Solution for solving the problem

[0010] According to this utility model, an electrolytic cell unit is provided to solve the above-mentioned problems. That is,

[0011] Provided is "an electrolytic cell unit comprising an anode chamber and a cathode chamber, characterized in that,"

[0012] This electrolytic cell unit has the following features:

[0013] An anode, which is disposed in the anode chamber;

[0014] A current collector, which is disposed in the cathode chamber;

[0015] A partition wall dividing the anode chamber and the cathode chamber; and

[0016] The flanges define the two ends and the lower end of the anode chamber in the width direction.

[0017] The flange is provided with a protrusion that projects toward the anode chamber and extends along the inner circumference of the flange.

[0018] At least one of the two ends and the lower end of the anode in the width direction is supported by the protrusion.

[0019] Preferably, the two ends and the lower end of the anode in the width direction are supported by the protrusion.

[0020] Alternatively, the protrusion may be able to extend or retract along the depth direction of the anode chamber.

[0021] Preferably, the flange defines the two ends and the lower end of both the anode chamber and the cathode chamber in the width direction.

[0022] Preferably, the two ends and the lower end of the partition wall in the width direction are bent toward the cathode chamber and joined to the flange, and the two ends and the lower end of the current collector in the width direction are supported by the two ends and the lower end of the partition wall in the width direction.

[0023] Preferably, the flange is provided with an additional protrusion that protrudes toward the cathode chamber and extends along the inner circumference of the flange, and the two ends and the lower end of the current collector in the width direction are supported by the additional protrusion.

[0024] Alternatively, the additional protrusion may be able to extend or retract along the depth direction of the cathode chamber.

[0025] Furthermore, according to this utility model, an electrolytic cell unit is provided to solve the above-mentioned problems. That is,

[0026] Provided is "an electrolytic cell unit comprising an anode chamber and a cathode chamber, characterized in that,"

[0027] This electrolytic cell unit has the following features:

[0028] An anode, which is disposed in the anode chamber;

[0029] The current collector is disposed in the cathode chamber;

[0030] A partition wall dividing the anode chamber and the cathode chamber; and

[0031] The flange defines the two ends and the lower end of the cathode chamber in the width direction.

[0032] The flange is provided with a protrusion that projects toward the cathode chamber and extends along the inner circumference of the flange.

[0033] At least one of the two ends and the lower end of the current collector in the width direction is supported by the protrusion.

[0034] Preferably, the two ends and the lower end of the current collector in the width direction are supported by the protrusion.

[0035] Alternatively, the protrusion may be able to extend or retract along the depth direction of the cathode chamber.

[0036] Preferably, the flange defines the two ends and the lower end of both the anode chamber and the cathode chamber in the width direction.

[0037] Preferably, the two ends and the lower end of the partition wall in the width direction are bent toward the anode chamber and joined to the flange, and the two ends and the lower end of the anode in the width direction are supported by the two ends and the lower end of the partition wall in the width direction.

[0038] Preferably, the flange is provided with additional protrusions that project toward the anode chamber and extend along the inner circumference of the flange, and the two ends and the lower end of the anode in the width direction are supported by the additional protrusions.

[0039] Alternatively, the additional protrusion may be able to extend or retract along the depth direction of the anode chamber.

[0040] Effects of the utility model

[0041] In the electrolytic cell unit of this invention, at least one of the two ends and the lower end of the anode or current collector in the width direction is supported by a protrusion extending along the inner circumference of the flange, thereby preventing the anode or current collector from collapsing toward the electrode chamber side and ensuring the flatness of the anode or current collector. Attached Figure Description

[0042] Figure 1 This is a front view of the first embodiment of the electrolytic cell unit of this utility model.

[0043] Figure 2 yes Figure 1 Sectional view along line II-II.

[0044] Figure 3 yes Figure 1 Sectional view along line III-III.

[0045] Figure 4 This is a cross-sectional view of the second embodiment, in which the anode's two ends and lower end are supported on the protrusion in the width direction, and the current collector's two ends and lower end are supported on the two ends and lower end of the partition wall in the width direction. (This cross-sectional view is equivalent to...) Figure 2 ).

[0046] Figure 5 This is a cross-sectional view of the second embodiment, in which the anode's two ends and lower end are supported on the protrusion in the width direction, and the current collector's two ends and lower end are supported on the two ends and lower end of the partition wall in the width direction. (This cross-sectional view is equivalent to...) Figure 3 ).

[0047] Figure 6 This is a cross-sectional view of the third embodiment in which the two ends and the lower end of the anode in the width direction are supported by protrusions, and the two ends and the lower end of the current collector in the width direction are supported by additional protrusions (this cross-sectional view is equivalent to...). Figure 2 ).

[0048] Figure 7 This is a cross-sectional view of the third embodiment in which the two ends and the lower end of the anode in the width direction are supported by protrusions, and the two ends and the lower end of the current collector in the width direction are supported by additional protrusions (this cross-sectional view is equivalent to...). Figure 3 ).

[0049] Figure 8 This is a cross-sectional view of the fourth embodiment of the electrolytic cell unit having two partition walls and the anode's two ends and lower end supported by protrusions in the width direction (this cross-sectional view is equivalent to...). Figure 2 ).

[0050] Figure 9 This is a cross-sectional view of the fourth embodiment of the electrolytic cell unit having two partition walls and the anode's two ends and lower end supported by protrusions in the width direction (this cross-sectional view is equivalent to...). Figure 3 ).

[0051] Figure 10 This is a cross-sectional view of the fifth embodiment, in which the two ends and the lower end of the current collector are supported by the protrusion in the width direction (this cross-sectional view is equivalent to...). Figure 2 ).

[0052] Figure 11 This is a cross-sectional view of the fifth embodiment, in which the two ends and the lower end of the current collector are supported by the protrusion in the width direction (this cross-sectional view is equivalent to...). Figure 3 ).

[0053] Figure 12This is a cross-sectional view of the sixth embodiment, in which the ends and lower end of the current collector in the width direction are supported by the protrusion, and the ends and lower end of the anode in the width direction are supported by the ends and lower end of the partition wall in the width direction. (This cross-sectional view is equivalent to...) Figure 2 ).

[0054] Figure 13 This is a cross-sectional view of the sixth embodiment, in which the ends and lower end of the current collector in the width direction are supported by the protrusion, and the ends and lower end of the anode in the width direction are supported by the ends and lower end of the partition wall in the width direction. (This cross-sectional view is equivalent to...) Figure 3 ).

[0055] Figure 14 This is a cross-sectional view of the seventh embodiment, in which the ends of the current collector in the width direction are supported by protrusions on both sides and the bottom end, and the ends of the anode in the width direction are supported by additional protrusions on both sides and the bottom end. (This cross-sectional view is equivalent to...) Figure 2 ).

[0056] Figure 15 This is a cross-sectional view of the seventh embodiment, in which the ends of the current collector in the width direction are supported by protrusions on both sides and the bottom end, and the ends of the anode in the width direction are supported by additional protrusions on both sides and the bottom end. (This cross-sectional view is equivalent to...) Figure 3 ).

[0057] Figure 16 This is a cross-sectional view of the eighth embodiment of the electrolytic cell unit having two partition walls and the two ends and the lower end of the current collector supported on the protrusion in the width direction (this cross-sectional view is equivalent to...). Figure 2 ).

[0058] Figure 17 This is a cross-sectional view of the eighth embodiment of the electrolytic cell unit having two partition walls and the two ends and the lower end of the current collector supported on the protrusion in the width direction (this cross-sectional view is equivalent to...). Figure 3 ).

[0059] Figure 18 This is a cross-sectional view of the ninth embodiment of the electrolytic cell unit having two partition walls, with the anode's two ends and lower end supported by protrusions in the width direction, and the current collector's two ends and lower end supported by additional protrusions in the width direction. (This cross-sectional view is equivalent to...) Figure 2 ).

[0060] Figure 19 This is a cross-sectional view of the ninth embodiment of the electrolytic cell unit having two partition walls, with the anode's two ends and lower end supported by protrusions in the width direction, and the current collector's two ends and lower end supported by additional protrusions in the width direction. (This cross-sectional view is equivalent to...) Figure 3 ).

[0061] Explanation of reference numerals in the attached figures

[0062] 2. Electrolytic cell unit; 4. Electrode chamber; 6. Gas-liquid separation chamber; 8. Anode chamber; 10. Cathode chamber; 14. Anode; 16. Partition wall; 18. First rib; 20. Current collector; 22. Second rib; 24. Buffer; 26. Cathode; 28. Flange; 30. Side flange; 32. Lower flange; 34. Protrusion; 36. Side protrusion; 38. Lower protrusion; 40. Frame; 42. Side frame; 44. Lower frame; 46. First supply nozzle; 48 50. Second supply nozzle; 52. Anode-side gas-liquid separation chamber; 53. Cathode-side gas-liquid separation chamber; 54. First flange; 56. Top plate; 58. Side wall; 60. Dividing plate; 62. Second flange; 64. Top plate; 66. Side wall; 68. Dividing plate; 70. First discharge nozzle; 72. Second discharge nozzle; 74. Additional protrusion; 76. Side additional protrusion; 78. Lower additional protrusion; 80. Composite plate; 82. First partition wall; 84. Second partition wall. Detailed Implementation

[0063] (First Embodiment)

[0064] Hereinafter, preferred embodiments of the electrolytic cell unit of this utility model will be described with reference to the accompanying drawings. First, the first embodiment will be described.

[0065] (Electrolytic Cell Unit 2)

[0066] Reference Figure 1 and Figure 2 To illustrate, the electrolytic cell unit 2 includes an electrode chamber 4 for electrolyzing liquids and a gas-liquid separation chamber 6 for separating the gas generated during electrolysis from the electrolyte (see reference). Figure 2 ).

[0067] (Electrode Chamber 4)

[0068] like Figure 2 and Figure 3 As shown, electrode chamber 4 includes an anode chamber 8 and a cathode chamber 10 disposed adjacent to the anode chamber 8. When the electrolytic cell unit 2 is used for the electrolysis of alkali metal hydroxides, the anode chamber 8 and the cathode chamber 10 are, for example, formed of nickel (Ni).

[0069] (Anode Chamber 8)

[0070] like Figure 2 and Figure 3 As shown, the anode chamber 8 includes an anode 14, a partition wall 16 disposed at an open interval from the anode 14, and a plurality of first ribs 18 disposed between the anode 14 and the partition wall 16.

[0071] (Anode 14)

[0072] Although not shown, the rectangular plate-shaped anode 14 has multiple openings. The shape of the openings is arbitrary, such as a rhombus shape, a flat fan shape, a slit shape, etc. The multiple openings can be arranged in an alternating pattern.

[0073] Anode 14 has a width direction along the electrolytic cell unit 2 ( Figure 3 The main portion 14a extends in the direction indicated by the middle arrow X, and the side portions 14b include both ends of the main portion 14a in the width direction (X direction) (see reference). Figure 3 ), and the lower end portion 14c including the lower end of the main portion 14a (see reference 14a). Figure 2 ).

[0074] (Divider 16)

[0075] The partition wall 16 is in the depth direction of the electrolytic cell unit 2 ( Figure 2 The partition wall 16 is arranged at an open interval from the anode 14 in the direction indicated by the middle arrow Y. The partition wall 16 includes sections along the vertical direction of the electrolytic cell unit 2. Figure 2 The main portion 16a extends in the direction indicated by the middle arrow Z, and the side portions 16b bend towards the cathode chamber 10 from both sides of the main portion 16a in the width direction (X direction) (see reference). Figure 3 ), and the lower end portion 16c that bends from the lower end of the main portion 16a toward the cathode chamber 10 (see reference). Figure 2 Additionally, the side end 16b and lower end 16c of the partition wall 16 can also be bent toward the anode chamber 8.

[0076] (1st rib, 18th rib)

[0077] like Figure 3 As shown, multiple first ribs 18 are provided at intervals in the width direction. Each first rib 18 extends in the vertical direction (Z direction). Each first rib 18 has a main portion 18a extending from the anode 14 toward the partition wall 16 in the depth direction and multiple connecting pieces 18b protruding from the end of the main portion 18a on the partition wall 16 side in the width direction. The end of the main portion 18a on the anode 14 side is connected to the anode 14, and each connecting piece 18b is connected to the main portion 16a of the partition wall 16.

[0078] like Figure 2 As shown, at the end of the partition wall 16 side of the main part 18a, a plurality of cuts 18c are provided at intervals in the vertical direction. The cuts 18c are located between adjacent connecting pieces 18b. Through the plurality of cuts 18c, the flow of liquid and gas in the width direction is ensured within the anode chamber 8.

[0079] (Cathode Chamber 10)

[0080] like Figure 2 and Figure 3As shown, the cathode chamber 10 includes a current collector 20, a partition wall 16 disposed at an open interval from the current collector 20, and a plurality of second ribs 22 disposed between the current collector 20 and the partition wall 16.

[0081] (Current collector 20)

[0082] The rectangular plate-shaped current collector 20, like the anode 14, has multiple openings (not shown). The shape of the openings is arbitrary, such as a rhombus shape, a flat fan shape, a slit shape, etc. The multiple openings can be arranged in an alternating pattern.

[0083] When assembling an electrolytic cell by arranging multiple electrolytic cell units 2 along the depth direction and pressing them from both sides or one side of the depth direction, a cathode 26 is assembled on the outer surface of the current collector 20 through a metal buffer 24.

[0084] (2nd rib, 22nd rib)

[0085] Like the first rib 18, multiple second ribs 22 are provided at intervals in the width direction and extend along the vertical direction (Z direction). The multiple second ribs 22 are arranged in the width direction at positions corresponding to the multiple first ribs 18. Each second rib 22 has a main portion 22a extending from the current collector 20 toward the partition wall 16 in the depth direction and multiple connecting pieces 22b protruding in the width direction from the end of the main portion 22a on the partition wall 16 side. The end of the main portion 22a on the current collector 20 side is connected to the current collector 20, and each connecting piece 22b is connected to the main portion 16a of the partition wall 16.

[0086] like Figure 2 As shown, at the end of the main part 22a on the partition wall 16 side, a plurality of cuts 22c are provided at intervals in the vertical direction. The cuts 22c are located between adjacent connecting pieces 22b. Through the plurality of cuts 22c, the flow of liquid and gas in the width direction is ensured within the cathode chamber 10.

[0087] (Flange 28)

[0088] like Figure 1 As shown, the electrolytic cell unit 2 includes flanges 28 at both ends and the lower end of the anode chamber 8 in the width direction. The flanges 28 include side flanges 30 at both ends of the anode chamber 8 in the width direction and a lower flange 32 at the lower end of the anode chamber 8. The flanges 28 are formed of nickel, for example.

[0089] Preferably, the flange 28 defines the two ends and the lower end of the anode chamber 8 and the cathode chamber 10 in the width direction.

[0090] (Side flange 30)

[0091] like Figure 1As shown, the side flanges 30 extend vertically in a pair along the width direction at both ends of the anode chamber 8 and the cathode chamber 10. (Refer to...) Figure 3 To illustrate, the side flange 30 has sidewall portions 30a extending in the depth direction from both ends in the width direction of the anode chamber 8 and the cathode chamber 10, flange portions 30b extending outward in the width direction from the two top ends of the sidewall portions 30a, and protrusions 30c extending inward in the depth direction from the two top ends of the flange portions 30b. The two sidewall portions 30a of the side flange 30 are joined to the two ends 16b in the width direction of the partition wall 16 on the cathode chamber 10 side. In addition, although not shown, when the side ends 16b of the partition wall 16 are bent toward the anode chamber 8 side, the two sidewall portions 30a of the side flange 30 are joined to the two ends 16b in the width direction of the partition wall 16 on the anode chamber 8 side.

[0092] As a method for joining the side end portion 16b and the side wall portion 30a, various joining methods such as seam welding, TIG welding or laser welding can be mentioned, but seam welding is preferred from the perspective of less strain and lower cost.

[0093] (lower flange 32)

[0094] like Figure 1 As shown, the lower flange 32 extends along the width direction at the lower ends of both the anode chamber 8 and the cathode chamber 10. (Refer to...) Figure 2 To illustrate, the lower flange 32 has a bottom portion 32a extending in the depth direction from the lower ends of both the anode chamber 8 and the cathode chamber 10, a flange portion 32b extending upward, downward, and downward from the two top ends of the bottom portion 32a, and a protrusion 32c extending inward in the depth direction from the two top ends of the flange portion 32b. The bottom portion 32a of the lower flange 32 joins the lower end portion 16c of the partition wall 16 on the cathode chamber 10 side. Furthermore, although not shown, when the lower end portion 16c of the partition wall 16 is bent towards the anode chamber 8 side, the bottom portion 32a of the lower flange 32 joins the lower end portion 16c of the partition wall 16 on the anode chamber 8 side.

[0095] As a method for joining the lower end portion 16c to the side wall portion 30a, seam welding, TIG welding, or laser welding can be mentioned, but seam welding is preferred from the perspective of less strain and lower cost.

[0096] (Protrusion 34)

[0097] like Figure 2 and Figure 3 As shown, a protrusion 34 is provided on the flange 28, protruding toward the anode chamber 8 and extending along the inner circumference of the flange 28. The protrusion 34 includes a side protrusion 36 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 3 ) and the lower protrusion 38 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 2 ).

[0098] like Figure 2 and Figure 3 As shown, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the protrusion 34. That is, the two ends 14b of the anode 14 in the width direction are supported by the side protrusion 36 (see reference). Figure 3 The lower end 14c of the anode 14 is supported by the lower protrusion 38 (see reference). Figure 2 Therefore, even in the event of pressure fluctuations within the electrolytic cell, it is possible to prevent the anode 14 from collapsing towards the anode chamber 8, ensuring the flatness of the anode 14. Here, support means that at least a portion of the anode 14 is in contact with the protrusion 34. This also includes cases where it is fixed using methods such as welding or threaded fastening.

[0099] Furthermore, it is permissible for at least one of the two ends 14b and the lower end 14c of the anode 14 in the width direction to be supported by the protrusion 34, but from the viewpoint of ensuring the flatness of the anode 14, it is preferable that, as described above, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the protrusion 34.

[0100] Alternatively, the two ends 14b and the lower end 14c of the anode 14 in the width direction may be supported on the protrusion 34 in a bent state, either or both of the two ends 14b and the lower end 14c in the width direction of the anode 14.

[0101] From the viewpoint of ensuring the flatness of the anode 14, it is preferable that the two end portions 14b and the lower end portion 14c of the anode 14 are continuously supported on the protrusion 34 over the entire area in the vertical and width directions, respectively.

[0102] Preferably, the protrusion 34 is capable of extending and retracting along the depth direction of the anode chamber 8. The reason for this will be explained later.

[0103] (Frame 40)

[0104] A frame 40 is disposed inside the flange 28. The frame 40 is a hollow, rectangular cross-section. The frame 40 includes side frames 42 (see reference). Figure 3 ) and lower frame 44 (refer to Figure 2 The frame 40 is formed of a suitable metal material such as stainless steel.

[0105] (Side frame 42)

[0106] like Figure 3 As shown, the side frame 42 is disposed inside the side flange 30 and extends in the vertical direction.

[0107] (Lower frame 44)

[0108] like Figure 2 As shown, the lower frame 44 is disposed inside the lower flange 32 and extends along the width direction. Two through holes (not shown) are provided in the lower frame 44, extending vertically.

[0109] Furthermore, when the protrusion 34 can extend and retract along the depth direction of the anode chamber 8, the inner surface of the flange portion 30b of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0110] The method for inserting the frame 40 into the flange 28 when the protrusion 34 can extend and retract along the depth direction of the anode chamber 8 will be described. Before insertion, the protrusion 34 on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the protrusion 34 retracts along the depth direction of the anode chamber 8, resulting in the inner surface of the flange portion 30b of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 being in close contact with the outer surface of the lower frame 44. Because of this state, when the protrusion 34 can extend and retract along the depth direction of the anode chamber 8, as described later, the flatness of the side flange 30 and the lower flange 32 can be ensured even when multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction.

[0111] (First supply nozzle 46, second supply nozzle 48)

[0112] A first supply nozzle 46 for supplying raw material liquid to the anode chamber 8 is fitted into a through hole in the lower frame 44 (see reference). Figure 1 and Figure 2 Additionally, a second supply nozzle 48 for supplying raw material liquid to the cathode chamber 10 is fitted into another through hole in the lower frame 44 (see reference). Figure 1 ).

[0113] (Gas-liquid separation chamber 6)

[0114] Reference Figure 2 To illustrate, the gas-liquid separation chamber 6 has an anode-side gas-liquid separation chamber 50 disposed above the anode chamber 8 and a cathode-side gas-liquid separation chamber 52 disposed above the cathode chamber 10.

[0115] (Anode-side gas-liquid separation chamber 50)

[0116] The anode-side gas-liquid separation chamber 50 is defined by the upper end portion of the partition wall 16 and the first flange 54. The anode-side gas-liquid separation chamber 50 is formed of a metallic material such as nickel.

[0117] The first flange 54 includes a top plate 56 extending in the Y direction from the upper end of the partition wall 16, a side wall 58 extending downward from the top of the top plate 56, and a dividing plate 60 extending in the Y direction from the lower end of the side wall 58 toward the partition wall 16. In addition, although not shown, an upwardly projecting tab may be provided at the base end of the top plate 56 (the end on the side of the partition wall 16).

[0118] The dividing plate 60 is a component that divides the anode chamber 8 and the anode-side gas-liquid separation chamber 50. The dividing plate 60 has through openings (not shown) that allow gas and electrolyte to pass from the anode chamber 8 to the anode-side gas-liquid separation chamber 50. These through openings are located on the anode 14 side in the Y direction. Furthermore, multiple through openings are spaced apart in the X direction.

[0119] (Cathode-side gas-liquid separation chamber 52)

[0120] The cathode-side gas-liquid separation chamber 52 is defined by the upper end portion of the partition wall 16 and the second flange 62. The cathode-side gas-liquid separation chamber 52 is formed of a metallic material such as nickel.

[0121] The second flange 62 includes a top plate 64 extending in the Y direction from the upper end of the partition wall 16, a side wall 66 extending downward from the top of the top plate 64, and a dividing plate 68 extending in the Y direction from the lower end of the side wall 66 toward the partition wall 16. In addition, although not shown, an upwardly projecting tab may also be provided at the base end of the top plate 64 (the end on the side of the partition wall 16).

[0122] The partition plate 68 is a component that divides the cathode chamber 10 and the cathode-side gas-liquid separation chamber 52. A through-opening (not shown) is formed in the partition plate 68 to allow electrolyte and gas to pass through from the cathode chamber 10 to the cathode-side gas-liquid separation chamber 52. The through-opening is located on the current collector 20 side in the Y direction. Furthermore, multiple through-openings are provided at intervals in the X direction.

[0123] (Exhaust nozzle)

[0124] like Figure 1 As shown, the discharge nozzles of the electrolytic cell unit 2 include a first discharge nozzle 70 for discharging gas and electrolyte from the anode-side gas-liquid separation chamber 50 and a second discharge nozzle 72 for discharging gas and electrolyte from the cathode-side gas-liquid separation chamber 52.

[0125] (Electrolytic cell)

[0126] When assembling the electrolytic cell, multiple electrolytic cell units 2 as described above are prepared and arranged along the depth direction with the anode 14 and cathode 26 facing each other. A diaphragm (not shown) is placed between the anode 14 and cathode 26. Then, the multiple electrolytic cell units 2 are pressed from both sides or one side in the depth direction using a hydraulic pressing device or the like. In addition, flow path components such as hoses connecting the first and second supply nozzles 46 and 48 and the first and second discharge nozzles 70 and 72 are provided.

[0127] Furthermore, when multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a gasket (not shown). However, when the protrusion 34 can extend and retract along the depth direction of the anode chamber 8, the inner surface of the flange portion 30b of the side flange 30 is in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 is in close contact with the outer surface of the lower frame 44, thus ensuring the flatness of the side flange 30 and the lower flange 32.

[0128] (electrolysis)

[0129] During electrolysis in the electrolytic cell, raw material liquid is supplied to the anode chamber 8 via the first supply nozzle 46. Additionally, raw material liquid is supplied to the cathode chamber 10 via the second supply nozzle 48. Then, a voltage is applied to the anode 14 and the cathode 26. At this time, gas is generated at the anode 14 and the cathode 26, producing an electrolyte containing multiple bubbles.

[0130] The bubble-containing electrolyte generated in the anode chamber 8 rises into the anode-side gas-liquid separation chamber 50 after passing through the through opening of the dividing plate 60.

[0131] Similarly, the bubble-containing electrolyte generated in the cathode chamber 10 also rises to the cathode-side gas-liquid separation chamber 52 after passing through the through opening of the dividing plate 68.

[0132] When bubbles rise in the anode chamber 8 or cathode chamber 10, and there is a collision between the bubble and the part of the dividing plate 60 or 68 that is not provided with an opening, the bubbles will combine and split, resulting in a large pressure change in the electrolytic cell.

[0133] However, the two ends 14b of the anode 14 in the width direction are supported by the side protrusions 36, and the lower end 14c of the anode 14 is supported by the lower protrusion 38, thus preventing the anode 14 from collapsing toward the anode chamber 8 and ensuring the flatness of the anode 14.

[0134] As described above, in the electrolytic cell unit 2, the collapse of the anode 14 toward the anode chamber 8 can be prevented, ensuring the flatness of the anode 14, thus enabling the stable and continuous operation of the electrolytic cell unit 2.

[0135] (Second Implementation)

[0136] Next, refer to Figure 4 and Figure 5 A second embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the second embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0137] Current collector 20 has along Figure 5 The main portion 20a extending in the width direction (X direction) indicated by the middle arrow X, and the side portions 20b including both ends of the main portion 20a in the width direction (X direction) (see reference). Figure 5 ), and the lower end portion 20c including the lower end of the main portion 20a (see reference ). Figure 4 ).

[0138] like Figure 4 and Figure 5 As shown, in the second embodiment, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported on the two ends 16b and the lower end 16c of the partition wall 16 in the width direction. Here, support means that at least a portion of the current collector 20 is in contact with the two ends 16b or the lower end 16c of the partition wall 16 in the width direction. In addition, cases of fixing by means of welding, threading, etc. are also included.

[0139] Furthermore, it is permissible as long as at least one of the side end portion 20b and the lower end portion 20c of the current collector 20 is supported on the two side ends 16b or the lower end portion 16c of the partition wall 16 in the width direction. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two side ends 20b and the lower end portion 20c of the current collector 20 in the width direction are supported on the two side ends 16b and the lower end portion 16c of the partition wall 16 in the width direction.

[0140] The two ends 20b and the lower end 20c of the current collector 20 are bent toward the partition wall 16 in the width direction (see reference). Figure 4 and Figure 5 Alternatively, the side end 20b and lower end 20c of the current collector 20 may be supported on the side end 16b and lower end 16c of the partition wall 16 without bending either or all of them.

[0141] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported on the two ends 16b and the lower end 16c of the partition wall 16 in the width direction over the entire area in the vertical direction and the width direction, respectively.

[0142] In the second embodiment, even when a large pressure fluctuation occurs in the electrolytic cell, the flatness of the current collector 20 is ensured because the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the two ends 16b and the lower end 16c of the partition wall 16 in the width direction.

[0143] (Third Implementation)

[0144] Next, refer to Figure 6 and Figure 7 A third embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the third embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0145] Current collector 20 has along Figure 7 The main portion 20a extending in the width direction (X direction) indicated by the middle arrow X, and the side portions 20b including both ends of the main portion 20a in the width direction (X direction) (see reference). Figure 7 ), and the lower end portion 20c including the lower end of the main portion 20a (see reference ). Figure 6 ).

[0146] (Additional protrusion 74)

[0147] like Figure 6 and Figure 7 As shown, an additional protrusion 74 is provided on the flange 28, protruding toward the cathode chamber 10 and extending along the inner circumference of the flange 28. The additional protrusion 74 includes a side additional protrusion 76 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 7 ) and the lower additional protrusion 78 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 6 ).

[0148] like Figure 6 and Figure 7 As shown, in the third embodiment, the two end portions 20b and the lower end portion 20c of the current collector 20 in the width direction are supported by the additional protrusion 74. That is, the two end portions 20b of the current collector 20 in the width direction are supported by the side additional protrusion 76 (see reference). Figure 7 The lower end 20c of the current collector 20 is supported by the lower additional protrusion 78 (see reference). Figure 6 Therefore, even in the event of pressure fluctuations within the electrolytic cell unit 2, it is possible to prevent the current collector 20 from collapsing towards the cathode chamber 10, ensuring the flatness of the current collector 20. Here, support means that at least a portion of the current collector 20 is in contact with the additional protrusion 74. This also includes cases where it is fixed using methods such as welding or threaded fastening.

[0149] Furthermore, it is permissible for at least one of the two ends 20b and the lower end 20c of the current collector 20 in the width direction to be supported by the additional protrusion 74. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the additional protrusion 74.

[0150] Alternatively, the two ends 20b and the lower end 20c of the current collector 20 in the width direction may be supported on the additional protrusion 74 in a bent state, either or both of the two ends 20b and the lower end 20c in the width direction of the current collector 20.

[0151] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported by the additional protrusion 74 over the entire area in the vertical direction and the width direction, respectively.

[0152] Preferably, the additional protrusion 74 is retractable along the depth direction of the cathode chamber 10. When the additional protrusion 74 is retractable along the depth direction of the cathode chamber 10, the inner surface of the flange portion 30b of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0153] The method for inserting the frame 40 into the flange 28 when the additional protrusion 74 can extend and retract along the depth direction of the cathode chamber 10 will be described. Before insertion, the additional protrusion 74 provided on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the additional protrusion 74 retracts along the depth direction of the cathode chamber 10, resulting in the inner surface of the flange portion 30b of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 being in close contact with the outer surface of the lower frame 44.

[0154] When multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a washer (not shown).

[0155] However, even though the first flange 54 and the second flange 62 are pressed against each other through a washer (not shown), the flatness of the side flange 30 and the lower flange 32 can be ensured because the inner surface of the flange portion 30b of the side flange 30 is in close contact with the outer surface of the side frame 42 and the inner surface of the flange portion 32b of the lower flange 32 is in close contact with the outer surface of the lower frame 44.

[0156] (Fourth implementation)

[0157] Next, refer to Figure 8 and Figure 9 A fourth embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the fourth embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0158] like Figure 8 and Figure 9 As shown, electrode chamber 4 includes an anode chamber 8 formed of a first material and a cathode chamber 10 formed of a second material. The anode chamber 8 and the cathode chamber 10 are connected via a composite plate 80. The composite plate 80 has a layer 80a of the first material and a carbon steel layer 80b.

[0159] For the first and second materials, when the electrolytic cell unit 2 is used for the electrolysis of an aqueous solution of alkali metal chloride, for example, the first material can be titanium (Ti) and the second material can be nickel (Ni).

[0160] (Separator 1, 82)

[0161] like Figure 8 As shown, the first partition wall 82 is disposed at an open interval from the anode 14 in the depth direction (Y direction). The first partition wall 82 is provided with a main portion 82a extending in the vertical direction (Z direction) (see reference). Figure 8 ), and the side portions 82b extending in the width direction (X direction) from the end of the main portion 82a toward the anode 14 in the depth direction (see reference). Figure 9 ), a flange portion 82c extending outward in the width direction from the top of the side portion (refer to) Figure 9 ), and a protrusion 82d that protrudes in the depth direction from the outer end of the flange 82c toward the main portion 82a (see reference). Figure 9 ).

[0162] In addition, such as Figure 8 As shown, the first partition wall 82 is provided with a bottom part 82e extending from the lower end of the main part 82a toward the anode 14 in the depth direction, a flange part 82f extending downward from the top end of the bottom part 82e, and a protrusion part 82g protruding from the lower end of the flange part 82f toward the main part 82a in the depth direction.

[0163] like Figure 9As shown, multiple first ribs 18 are provided at intervals in the width direction. Each first rib 18 extends in the vertical direction (Z direction). Each first rib 18 has a main portion 18a extending from the anode 14 toward the first partition wall 82 in the depth direction and multiple connecting pieces 18b protruding from the end of the main portion 18a on the first partition wall 82 side in the width direction. The end of the main portion 18a on the anode 14 side is connected to the anode 14, and each connecting piece 18b is connected to the main portion 82a of the first partition wall 82.

[0164] like Figure 8 As shown, at the end of the main section 18a on the side of the first partition wall 82, a plurality of cuts 18c are provided at intervals in the vertical direction. The cuts 18c are located between adjacent connecting pieces 18b. Through the plurality of cuts 18c, the flow of liquid and gas in the width direction is ensured within the anode chamber 8.

[0165] (Second partition wall 84)

[0166] like Figure 8 As shown, the second partition wall 84 is disposed at an open distance from the current collector 20 in the depth direction (Y direction). The second partition wall 84, like the first partition wall 82, is provided with a main portion 84a extending in the vertical direction (see reference). Figure 8 ), and the side portions 84b extending in the width direction from the end of the main portion 84a toward the current collector 20 in the depth direction (see reference). Figure 9 ), a flange portion 84c extending outward in the width direction from the top of the side portion 84b (see reference) Figure 9 ), and a protrusion 84d that protrudes in the depth direction from the outer end of the flange 84c toward the main portion 84a (see reference). Figure 9 ).

[0167] In addition, such as Figure 8 As shown, the second partition wall 84 has a bottom portion 84e extending from the lower end of the main portion 84a toward the current collector 20 in the depth direction, a flange portion 84f extending downward from the top end of the bottom portion 84e, and a protrusion portion 84g protruding from the lower end of the flange portion 84f toward the main portion 84a in the depth direction.

[0168] like Figure 9 As shown, multiple second ribs 22 are provided at intervals in the width direction, similar to the first ribs 18, and extend in the vertical direction. The multiple second ribs 22 are arranged in the width direction at positions corresponding to the positions of the multiple first ribs 18. Each second rib 22 has a main portion 22a extending from the current collector 20 toward the second partition wall 84 in the depth direction, and multiple connecting pieces 22b protruding in the width direction from the end of the main portion 22a on the second partition wall 84 side. The end of the main portion 22a on the current collector 20 side is connected to the current collector 20, and each connecting piece 22b is connected to the main portion 84a of the second partition wall 84.

[0169] like Figure 8 As shown, at the end of the main part 22a on the side of the second partition wall 84, a plurality of cuts 22c are provided at intervals in the vertical direction. The cuts 22c are located between adjacent connecting pieces 22b. The plurality of cuts 22c ensure the flow of liquid and gas in the width direction within the cathode chamber 10.

[0170] (Composite board 80)

[0171] Multiple composite plates 80 are provided at intervals in the width direction and extend in the vertical direction. The composite plates 80 are disposed between the back of the first partition wall 82 and the back of the second partition wall 84 at positions corresponding to the joint piece 18b of the first rib 18 and the joint piece 22b of the second rib 22.

[0172] Figure 8 and Figure 9 The composite plate 80 shown is a double-layered plate formed by explosive bonding of a first material layer 80a (e.g., a titanium layer) and carbon steel 80b. The first material layer 80a is bonded to the back side of a first partition wall 82 made of the first material, and the carbon steel 80b is bonded to the back side of a second partition wall 84 made of the second material.

[0173] like Figure 9 As shown, the side flanges 30 extend vertically in a pair at their ends in the width direction of both the anode chamber 8 and the cathode chamber 10. In the fourth embodiment, the side flanges 30 are formed by the side surface portion 82b, flange portion 82c, and protrusion 82d of the first partition wall 82, and the side surface portion 84b, flange portion 84c, and protrusion 84d of the second partition wall 84.

[0174] In addition, such as Figure 8 As shown, the lower flange 32 extends along the width direction at the lower ends of both the anode chamber 8 and the cathode chamber 10. In the fourth embodiment, the lower flange 32 is formed by the bottom portion 82e, flange portion 82f, and protrusion 82g of the first partition wall 82, and the bottom portion 84e, flange portion 84f, and protrusion 84g of the second partition wall 84.

[0175] like Figure 8 and Figure 9 As shown, in the fourth embodiment, the two end portions 14b and the lower end portion 14c of the anode 14 in the width direction are supported by the protrusion 34. That is, the two end portions 14b of the anode 14 in the width direction are supported by the side protrusion 36 (see reference). Figure 9 The lower end 14c of the anode 14 is supported by the lower protrusion 38 (see reference). Figure 8Therefore, even in the event of pressure fluctuations within the electrolytic cell, it is possible to prevent the anode 14 from collapsing towards the anode chamber 8, ensuring the flatness of the anode 14. Here, support means that at least a portion of the anode 14 is in contact with the protrusion 34. This also includes cases where it is fixed using methods such as welding or threaded fastening.

[0176] Furthermore, it is permissible for at least one of the two ends 14b and the lower end 14c of the anode 14 in the width direction to be supported by the protrusion 34, but from the viewpoint of ensuring the flatness of the anode 14, it is preferable that, as described above, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the protrusion 34.

[0177] Alternatively, the two ends 14b and the lower end 14c of the anode 14 in the width direction may be supported on the protrusion 34 in a bent state, either or both of the two ends 14b and the lower end 14c in the width direction of the anode 14.

[0178] From the viewpoint of ensuring the flatness of the anode 14, it is preferable that the two ends 14b and the lower end 14c of the anode 14 in the width direction are continuously supported by the protrusion 34 over the entire area in the vertical direction and the width direction, respectively.

[0179] Reference Figure 8 To illustrate, the anode-side gas-liquid separation chamber 50 is formed by the upper end portion of the first partition wall 82 and the first flange 54 made of the first material.

[0180] The first flange 54 includes a top plate 56 extending from the upper end of the first partition wall 82 in the depth direction, a side wall 58 extending downward from the top end of the top plate 56, and a dividing plate 60 extending from the lower end of the side wall 58 toward the first partition wall 82 in the depth direction. Furthermore, although not shown, an upwardly projecting tab may also be provided at the base end of the top plate 56 (the end on the side of the first partition wall 82).

[0181] Reference Figure 8 To illustrate, the cathode-side gas-liquid separation chamber 52 is formed by the upper end portion of the second partition wall 84 and the second flange 62 made of the second material.

[0182] The second flange 62 includes a top plate 64 extending in the Y direction from the upper end of the second partition wall 84, a side wall 66 extending downward from the top of the top plate 64, and a dividing plate 68 extending in the Y direction from the lower end of the side wall 66 toward the second partition wall 84. Furthermore, although not shown, an upwardly projecting tab may also be provided at the base end of the top plate 64 (the end on the side of the second partition wall 84).

[0183] (Fifth Embodiment)

[0184] Next, refer to Figure 10 and Figure 11 A fifth embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the fifth embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0185] The partition wall 16 is disposed at a distance from the anode 14 in the depth direction (Y direction) of the electrolytic cell unit 2. The partition wall 16 has a main portion 16a extending in the vertical direction (Z direction) of the electrolytic cell unit 2, and side portions 16b that bend towards the anode chamber 8 from both sides in the width direction (X direction) of the main portion 16a (see reference). Figure 11 ), and the lower end portion 16c that bends from the lower end of the main portion 16a toward the anode chamber 8 (see reference). Figure 10 Additionally, the side end 16b and lower end 16c of the partition wall 16 can also be bent toward the cathode chamber 10.

[0186] Current collector 20 has along Figure 11 The main portion 20a extending in the width direction (X direction) indicated by the middle arrow X, and the side portions 20b including both ends of the main portion 20a in the width direction (X direction) (see reference). Figure 11 ), and the lower end portion 20c including the lower end of the main portion 20a (see reference ). Figure 10 ).

[0187] like Figure 10 and Figure 11 As shown, the electrolytic cell unit 2 includes flanges 28 at both ends and the lower end of the cathode chamber 10 in the width direction. The flanges 28 include side flanges 30 at both ends of the cathode chamber 10 in the width direction (see reference). Figure 11 ) and the lower flange 32 at the lower end of the cathode chamber 10 (refer to Figure 10 Flange 28 is formed, for example, from nickel.

[0188] Preferably, the flange 28 defines the two ends and the lower end of the anode chamber 8 and the cathode chamber 10 in the width direction.

[0189] like Figure 11 As shown, the two side wall portions 30a of the side flange 30 and the two side ends 16b of the partition wall 16 in the width direction are joined on the anode chamber 8 side. In addition, although not shown, when the side ends 16b of the partition wall 16 are bent toward the cathode chamber 10 side, the two side wall portions 30a of the side flange 30 and the two side ends 16b of the partition wall 16 in the width direction are joined on the cathode chamber 10 side.

[0190] like Figure 10As shown, the bottom portion 32a of the lower flange 32 and the lower end portion 16c of the partition wall 16 are joined on the anode chamber 8 side. Additionally, although not shown, when the lower end portion 16c of the partition wall 16 is bent toward the cathode chamber 10 side, the bottom portion 32a of the lower flange 32 and the lower end portion 16c of the partition wall 16 are joined on the cathode chamber 10 side.

[0191] like Figure 10 and Figure 11 As shown, a protrusion 34 is provided on the flange 28, protruding toward the cathode chamber 10 and extending along the inner circumference of the flange 28. The protrusion 34 includes a side protrusion 36 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 11 ) and the lower protrusion 38 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 10 ).

[0192] like Figure 10 and Figure 11 As shown, in the fifth embodiment, the two end portions 20b and the lower end portion 20c of the current collector 20 in the width direction are supported by the protrusion 34. That is, the two end portions 20b of the current collector 20 in the width direction are supported by the side protrusion 36 (see reference). Figure 11 The lower end 20c of the current collector 20 is supported by the lower protrusion 38 (see reference). Figure 10 Therefore, even in the event of pressure fluctuations within the electrolytic cell unit 2, it is possible to prevent the current collector 20 from collapsing towards the cathode chamber 10, ensuring the flatness of the current collector 20. Here, support means that at least a portion of the current collector 20 is in contact with the protrusion 34. Additionally, this also includes cases where it is fixed using methods such as welding or threaded fastening.

[0193] Furthermore, it is permissible for at least one of the two ends 20b and the lower end 20c of the current collector 20 in the width direction to be supported by the protrusion 34. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the protrusion 34.

[0194] Alternatively, the two ends 20b and the lower end 20c of the current collector 20 in the width direction may be supported on the protrusion 34 in a bent state, either or both of the two ends 20b and the lower end 20c in the width direction of the current collector 20.

[0195] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported by the protrusion 34 over the entire area in the vertical direction and the width direction, respectively.

[0196] Preferably, the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10. When the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10, the inner surface of the flange portion 30b of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0197] The method for inserting the frame 40 into the flange 28 when the protrusion 34 can extend and retract along the depth direction of the cathode chamber 10 will be described. Before insertion, the protrusion 34 on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the protrusion 34 retracts along the depth direction of the cathode chamber 10, resulting in the inner surface of the flange portion 30b of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 being in close contact with the outer surface of the lower frame 44.

[0198] When multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a washer (not shown).

[0199] However, even though the first flange 54 and the second flange 62 are pressed against each other through a washer (not shown), the flatness of the side flange 30 and the lower flange 32 can be ensured because the inner surface of the flange portion 30b of the side flange 30 is in close contact with the outer surface of the side frame 42 and the inner surface of the flange portion 32b of the lower flange 32 is in close contact with the outer surface of the lower frame 44.

[0200] (Sixth Embodiment)

[0201] Next, refer to Figure 12 and Figure 13 A sixth embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the sixth embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0202] The partition wall 16 is disposed at a distance from the anode 14 in the depth direction (Y direction) of the electrolytic cell unit 2. The partition wall 16 has a main portion 16a extending in the vertical direction (Z direction) of the electrolytic cell unit 2, and side portions 16b that bend towards the anode chamber 8 from both sides in the width direction (X direction) of the main portion 16a (see reference). Figure 13 ), and the lower end portion 16c that bends from the lower end of the main portion 16a toward the anode chamber 8 (see reference). Figure 12 ).

[0203] like Figure 12 and Figure 13 As shown, in the sixth embodiment, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the two ends 16b and the lower end 16c of the partition wall 16 in the width direction. That is, the two ends 14b of the anode 14 in the width direction are supported by the two ends 16b of the partition wall 16 in the width direction (see reference). Figure 13 The lower end 14c of the anode 14 is supported by the lower end 16c of the partition wall 16 (see reference). Figure 12 Here, support means that at least a portion of the anode 14 is in contact with either the two ends 16b and the lower end 16c of the partition wall 16 in the width direction. Additionally, it also includes cases where it is fixed by means of welding, threading, etc.

[0204] Furthermore, it is permissible for at least one of the two ends 14b and the lower end 14c of the anode 14 in the width direction to be supported by the partition wall 16. However, from the viewpoint of ensuring the flatness of the anode 14, it is preferable that, as described above, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the two ends 16b and the lower end 16c of the partition wall 16 in the width direction.

[0205] The two ends 14b and the lower end 14c of the anode 14 in the width direction are bent toward the partition wall 16 (see reference). Figure 12 and Figure 13 Alternatively, the side end 14b and the lower end 14c of the anode 14 may be supported on the side end 16b and the lower end 16c of the partition wall 16 without bending either or all of them.

[0206] From the viewpoint of ensuring the flatness of the anode 14, it is preferable that the two ends 14b and the lower end 14c of the anode 14 in the width direction are continuously supported by the side ends 16b and the lower end 16c of the partition wall 16 in the vertical direction and the width direction, respectively.

[0207] In the sixth embodiment, even if a large pressure fluctuation occurs in the electrolytic cell, the anode 14 is supported by the two ends 14b and the lower end 14c in the width direction of the anode 14, thus preventing the anode 14 from collapsing toward the anode chamber 8 and ensuring the flatness of the anode 14.

[0208] Current collector 20 has along Figure 13 The main portion 20a extending in the width direction (X direction) indicated by the middle arrow X, and the side portions 20b including both ends of the main portion 20a in the width direction (X direction) (see reference). Figure 13 ), and the lower end portion 20c including the lower end of the main portion 20a (see reference ). Figure 12 ).

[0209] like Figure 12 and Figure 13 As shown, the electrolytic cell unit 2 includes flanges 28 at both ends and the lower end of the cathode chamber 10 in the width direction. The flanges 28 include side flanges 30 at both ends of the cathode chamber 10 in the width direction (see reference). Figure 13 ) and the lower flange 32 at the lower end of the cathode chamber 10 (refer to Figure 12 Flange 28 is formed, for example, from nickel.

[0210] Preferably, the flange 28 defines the two ends and the lower end of the anode chamber 8 and the cathode chamber 10 in the width direction.

[0211] like Figure 13 As shown, the two side wall portions 30a of the side flange 30 and the two side ends 16b of the partition wall 16 in the width direction are joined on the anode chamber 8 side.

[0212] like Figure 12 As shown, the bottom part 32a of the lower flange 32 and the lower end part 16c of the partition wall 16 are joined on the anode chamber 8 side.

[0213] like Figure 12 and Figure 13 As shown, a protrusion 34 is provided on the flange 28, protruding toward the cathode chamber 10 and extending along the inner circumference of the flange 28. The protrusion 34 includes a side protrusion 36 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 13 ) and the lower protrusion 38 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 12 ).

[0214] like Figure 12 and Figure 13 As shown, in the sixth embodiment, the two end portions 20b and the lower end portion 20c of the current collector 20 in the width direction are supported by the protrusion 34. That is, the two end portions 20b of the current collector 20 in the width direction are supported by the side protrusion 36 (see reference). Figure 13 The lower end 20c of the current collector 20 is supported by the lower protrusion 38 (see reference). Figure 12 Therefore, even in the event of pressure fluctuations within the electrolytic cell unit 2, it is possible to prevent the current collector 20 from collapsing towards the cathode chamber 10, ensuring the flatness of the current collector 20. Here, support means that at least a portion of the current collector 20 is in contact with the protrusion 34. Additionally, this also includes cases where it is fixed using methods such as welding or threaded fastening.

[0215] Furthermore, it is permissible for at least one of the two ends 20b and the lower end 20c of the current collector 20 in the width direction to be supported by the protrusion 34. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the protrusion 34.

[0216] Alternatively, the two ends 20b and the lower end 20c of the current collector 20 in the width direction may be supported on the protrusion 34 in a state in which one or all of the two ends 20b and the lower end 20c in the width direction of the current collector 20 are bent.

[0217] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported by the protrusion 34 over the entire area in the vertical direction and the width direction, respectively.

[0218] Preferably, the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10. When the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10, the inner surface of the flange portion 30b of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0219] The method for inserting the frame 40 into the flange 28 when the protrusion 34 can extend and retract along the depth direction of the cathode chamber 10 will be described. Before insertion, the protrusion 34 on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the protrusion 34 retracts along the depth direction of the cathode chamber 10, resulting in the inner surface of the flange portion 30b of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 being in close contact with the outer surface of the lower frame 44.

[0220] When multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a washer (not shown).

[0221] However, even though the first flange 54 and the second flange 62 are pressed against each other through a washer (not shown), the flatness of the side flange 30 and the lower flange 32 can be ensured because the inner surface of the flange portion 30b of the side flange 30 is in close contact with the outer surface of the side frame 42 and the inner surface of the flange portion 32b of the lower flange 32 is in close contact with the outer surface of the lower frame 44.

[0222] (Seventh Embodiment)

[0223] Next, refer to Figure 14 and Figure 15 A seventh embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the seventh embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0224] Current collector 20 has along Figure 15 The main portion 20a extending in the width direction (X direction) indicated by the middle arrow X, and the side portions 20b including both ends of the main portion 20a in the width direction (X direction) (see reference). Figure 15 ), and the lower end portion 20c including the lower end of the main portion 20a (see reference ). Figure 14 ).

[0225] like Figure 14 and Figure 15 As shown, the electrolytic cell unit 2 includes flanges 28 at both ends and the lower end of the cathode chamber 10 in the width direction. The flanges 28 include side flanges 30 at both ends of the cathode chamber 10 in the width direction (see reference). Figure 15 ) and the lower flange 32 at the lower end of the cathode chamber 10 (refer to Figure 14 Flange 28 is formed, for example, from nickel.

[0226] Preferably, the flange 28 defines the two ends and the lower end of the anode chamber 8 and the cathode chamber 10 in the width direction.

[0227] like Figure 15 As shown, the two side wall portions 30a of the side flange 30 and the two side ends 16b of the partition wall 16 in the width direction are joined on the cathode chamber 10 side.

[0228] like Figure 14 As shown, the bottom part 32a of the lower flange 32 and the lower end part 16c of the partition wall 16 are joined on the cathode chamber 10 side.

[0229] like Figure 14 and Figure 15 As shown, a protrusion 34 is provided on the flange 28, protruding toward the cathode chamber 10 and extending along the inner circumference of the flange 28. The protrusion 34 includes a side protrusion 36 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 15 ) and the lower protrusion 38 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 14 ).

[0230] like Figure 14 and Figure 15 As shown, in the seventh embodiment, the two end portions 20b and the lower end portion 20c of the current collector 20 in the width direction are supported by the protrusion 34. That is, the two end portions 20b of the current collector 20 in the width direction are supported by the side protrusion 36 (see reference). Figure 15 The lower end 20c of the current collector 20 is supported by the lower protrusion 38 (see reference). Figure 14Therefore, even in the event of pressure fluctuations within the electrolytic cell unit 2, it is possible to prevent the current collector 20 from collapsing towards the cathode chamber 10, ensuring the flatness of the current collector 20. Here, support means that at least a portion of the current collector 20 is in contact with the protrusion 34. Additionally, this also includes cases where it is fixed using methods such as welding or threaded fastening.

[0231] Furthermore, it is permissible for at least one of the two ends 20b and the lower end 20c of the current collector 20 in the width direction to be supported by the protrusion 34. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the protrusion 34.

[0232] Alternatively, the two ends 20b and the lower end 20c of the current collector 20 in the width direction may be supported on the protrusion 34 in a state in which one or all of the two ends 20b and the lower end 20c in the width direction of the current collector 20 are bent.

[0233] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported by the protrusion 34 over the entire area in the vertical direction and the width direction, respectively.

[0234] Preferably, the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10. When the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10, the inner surface of the flange portion 30b of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 32c of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0235] The method for inserting the frame 40 into the flange 28 when the protrusion 34 can extend and retract along the depth direction of the cathode chamber 10 will be described. Before insertion, the protrusion 34 on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the protrusion 34 retracts along the depth direction of the cathode chamber 10, resulting in the inner surface of the flange portion 30b of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 being in close contact with the outer surface of the lower frame 44.

[0236] When multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a washer (not shown).

[0237] However, even though the first flange 54 and the second flange 62 are pressed against each other through a washer (not shown), the flatness of the side flange 30 and the lower flange 32 can be ensured because the inner surface of the flange portion 30b of the side flange 30 is in close contact with the outer surface of the side frame 42 and the inner surface of the flange portion 32b of the lower flange 32 is in close contact with the outer surface of the lower frame 44.

[0238] (Additional protrusion 74)

[0239] like Figure 14 and Figure 15 As shown, an additional protrusion 74 is provided on the flange 28, protruding toward the anode chamber 8 and extending along the inner circumference of the flange 28. The additional protrusion 74 includes a side additional protrusion 76 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 15 ) and the lower additional protrusion 78 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 14 ).

[0240] like Figure 14 and Figure 15 As shown, in the seventh embodiment, the two end portions 14b and the lower end portion 14c of the anode 14 in the width direction are supported by the additional protrusion 74. That is, the two end portions 14b of the anode 14 in the width direction are supported by the side additional protrusion 76 (see reference). Figure 15 The lower end 14c of the anode 14 is supported by a lower additional protrusion 78 (see reference). Figure 14 Therefore, even in the event of pressure fluctuations within the electrolytic cell unit 2, it is possible to prevent the anode 14 from collapsing towards the anode chamber 8, ensuring the flatness of the anode 14. Here, support means that at least a portion of the anode 14 is in contact with the additional protrusion 74. Additionally, this also includes cases where it is fixed using methods such as welding or threaded fastening.

[0241] Furthermore, it is permissible for at least one of the two ends 14b and the lower end 14c of the anode 14 in the width direction to be supported by the additional protrusion 74, but from the viewpoint of ensuring the flatness of the anode 14, it is preferable that, as described above, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the additional protrusion 74.

[0242] Alternatively, the two ends 14b and the lower end 14c of the anode 14 in the width direction may be supported on the additional protrusion 74 in a state in which one or all of the two ends 14b and the lower end 14c in the width direction of the anode 14 are bent.

[0243] From the viewpoint of ensuring the flatness of the anode 14, it is preferable that the two ends 14b and the lower end 14c of the anode 14 in the width direction are continuously supported by the additional protrusion 74 over the entire area in the vertical direction and the width direction, respectively.

[0244] Preferably, the additional protrusion 74 is retractable along the depth direction of the anode chamber 8. When the additional protrusion 74 is retractable along the depth direction of the anode chamber 8, the inner surface of the flange portion 30b of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0245] The method for inserting the frame 40 into the flange 28 when the additional protrusion 74 can extend and retract along the depth direction of the anode chamber 8 will be described. Before insertion, the additional protrusion 74 provided on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the additional protrusion 74 retracts along the depth direction of the anode chamber 8, resulting in the inner surface of the flange portion 30b of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 32b of the lower flange 32 being in close contact with the outer surface of the lower frame 44.

[0246] When multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a washer (not shown).

[0247] However, even though the first flange 54 and the second flange 62 are pressed against each other through a washer (not shown), the flatness of the side flange 30 and the lower flange 32 can be ensured because the inner surface of the flange portion 30b of the side flange 30 is in close contact with the outer surface of the side frame 42 and the inner surface of the flange portion 32b of the lower flange 32 is in close contact with the outer surface of the lower frame 44.

[0248] (Eighth Embodiment)

[0249] Next, refer to Figure 16 and Figure 17 The eighth embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the eighth embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0250] like Figure 16 and Figure 17 As shown, electrode chamber 4 includes an anode chamber 8 formed of a first material and a cathode chamber 10 formed of a second material. The anode chamber 8 and the cathode chamber 10 are connected via a composite plate 80. The composite plate 80 has a layer 80a of the first material and a carbon steel layer 80b.

[0251] For the first and second materials, when the electrolytic cell unit 2 is used for the electrolysis of an aqueous solution of alkali metal chloride, for example, the first material can be titanium (Ti) and the second material can be nickel (Ni).

[0252] like Figure 16 As shown, the first partition wall 82 is disposed at an open interval from the anode 14 in the depth direction (Y direction). A main portion 82a extending in the vertical direction (Z direction) is provided on the first partition wall 82 (see reference). Figure 16 ), and the side portions 82b extending in the width direction (X direction) from the end of the main portion 82a toward the anode 14 in the depth direction (see reference). Figure 17 ), a flange portion 82c extending outward in the width direction from the top of the side portion (refer to) Figure 17 ), and a protrusion 82d that protrudes in the depth direction from the outer end of the flange 82c toward the main portion 82a (see reference). Figure 17 ).

[0253] In addition, such as Figure 16 As shown, the first partition wall 82 is provided with a bottom part 82e extending from the lower end of the main part 82a toward the anode 14 in the depth direction, a flange part 82f extending downward from the top end of the bottom part 82e, and a protrusion part 82g protruding from the lower end of the flange part 82f toward the main part 82a in the depth direction.

[0254] like Figure 16 As shown, multiple first ribs 18 are provided at intervals in the width direction. Each first rib 18 extends in the vertical direction (Z direction). Each first rib 18 has a main portion 18a extending from the anode 14 toward the first partition wall 82 in the depth direction and multiple connecting pieces 18b protruding from the end of the main portion 18a on the first partition wall 82 side in the width direction. The end of the main portion 18a on the anode 14 side is connected to the anode 14, and each connecting piece 18b is connected to the main portion 82a of the first partition wall 82.

[0255] like Figure 16 As shown, at the end of the main part 18a on the side of the first partition wall 82, a plurality of cuts 18c are provided at intervals in the vertical direction. The cuts 18c are located between adjacent connecting pieces 18b. The plurality of cuts 18c ensure the flow of liquid and gas in the width direction within the anode chamber 8.

[0256] like Figure 16 As shown, the second partition wall 84 is disposed at an open distance from the current collector 20 in the depth direction (Y direction). Like the first partition wall 82, the second partition wall 84 is also provided with a main portion 84a extending in the vertical direction (Z direction) (see reference). Figure 16 ), and the side portions 84b extending in the width direction (X direction) from the end of the main portion 84a toward the current collector 20 in the depth direction (see reference). Figure 17 ), a flange portion 84c extending outward in the width direction from the top of the side portion 84b (see reference) Figure 17), and a protrusion 84d that protrudes in the depth direction from the outer end of the flange 84c toward the main portion 84a (see reference). Figure 17 ).

[0257] In addition, such as Figure 16 As shown, the second partition wall 84 is provided with a bottom part 84e extending from the lower end of the main part 84a toward the current collector 20 in the depth direction, a flange part 84f extending downward from the top end of the bottom part 84e, and a protrusion part 84g protruding from the lower end of the flange part 84f toward the main part 84a in the depth direction.

[0258] like Figure 17 As shown, multiple second ribs 22 are provided at intervals in the width direction, similar to the first ribs 18, and extend along the vertical direction (Z direction). The multiple second ribs 22 are arranged in the width direction at positions corresponding to the multiple first ribs 18. Each second rib 22 has a main portion 22a extending from the current collector 20 toward the second partition wall 84 in the depth direction, and multiple connecting pieces 22b protruding in the width direction from the end of the main portion 22a on the second partition wall 84 side. The end of the main portion 22a on the current collector 20 side is connected to the current collector 20, and each connecting piece 22b is connected to the main portion 84a of the second partition wall 84.

[0259] like Figure 16 As shown, at the end of the main part 22a on the side of the second partition wall 84, a plurality of cuts 22c are provided at intervals in the vertical direction. The cuts 22c are located between adjacent connecting pieces 22b. The plurality of cuts 22c ensure the flow of liquid and gas in the width direction within the cathode chamber 10.

[0260] (Composite board 80)

[0261] Multiple composite plates 80 are provided at intervals in the width direction and extend in the vertical direction. The composite plates 80 are disposed between the back of the first partition wall 82 and the back of the second partition wall 84 at positions corresponding to the joint piece 18b of the first rib 18 and the joint piece 22b of the second rib 22.

[0262] Figure 16 and Figure 17 The composite plate 80 shown is a double-layered plate formed by explosive bonding of a first material layer 80a (e.g., a titanium layer) and carbon steel 80b. The first material layer 80a is bonded to the back side of a first partition wall 82 made of the first material, and the carbon steel 80b is bonded to the back side of a second partition wall 84 made of the second material.

[0263] like Figure 17As shown, the side flanges 30 extend vertically in a pair at their ends in the width direction of both the anode chamber 8 and the cathode chamber 10. In the eighth embodiment, the side flanges 30 are formed by the side surface portion 82b, flange portion 82c, and protrusion 82d of the first partition wall 82, and the side surface portion 84b, flange portion 84c, and protrusion 84d of the second partition wall 84.

[0264] In addition, such as Figure 16 As shown, the lower flange 32 extends along the width direction at the lower ends of both the anode chamber 8 and the cathode chamber 10. In the eighth embodiment, the lower flange 32 is formed by the bottom portion 82e, flange portion 82f, and protrusion 82g of the first partition wall 82, and the bottom portion 84e, flange portion 84f, and protrusion 84g of the second partition wall 84.

[0265] like Figure 16 and Figure 17 As shown, a protrusion 34 is provided on the flange 28, protruding toward the cathode chamber 10 and extending along the inner circumference of the flange 28. The protrusion 34 includes a side protrusion 36 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 17 ) and the lower protrusion 38 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 16 ).

[0266] like Figure 16 and Figure 17 As shown, in the eighth embodiment, the two end portions 20b and the lower end portion 20c of the current collector 20 in the width direction are supported by the protrusion 34. That is, the two end portions 20b of the current collector 20 in the width direction are supported by the side protrusion 36 (see reference). Figure 17 The lower end 20c of the current collector 20 is supported by the lower protrusion 38 (see reference). Figure 16 Therefore, even in the event of pressure fluctuations within the electrolytic cell, it is possible to prevent the current collector 20 from collapsing towards the cathode chamber 10, ensuring the flatness of the current collector 20. Here, support means that at least a portion of the current collector 20 is in contact with the protrusion 34. Additionally, this includes cases where it is fixed using methods such as welding or threaded fastening.

[0267] Furthermore, it is permissible for at least one of the two ends 20b and the lower end 20c of the current collector 20 in the width direction to be supported by the protrusion 34. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the protrusion 34.

[0268] Alternatively, the two ends 20b and the lower end 20c of the current collector 20 in the width direction may be supported on the protrusion 34 in a bent state, either or both of the two ends 20b and the lower end 20c in the width direction of the current collector 20.

[0269] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported by the protrusion 34 over the entire area in the vertical direction and the width direction, respectively.

[0270] Preferably, the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10. When the protrusion 34 is extendable and retractable along the depth direction of the cathode chamber 10, the inner surface of the flange portion 84c of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 84f of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0271] The method for inserting the frame 40 into the flange 28 when the protrusion 34 can extend and retract along the depth direction of the cathode chamber 10 will be described. Before insertion, the protrusion 34 on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the protrusion 34 retracts along the depth direction of the cathode chamber 10, resulting in the inner surface of the flange portion 84c of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 84f of the lower flange 32 being in close contact with the outer surface of the lower frame 44. Because of this state, when the protrusion 34 can extend and retract along the depth direction of the cathode chamber 10, the flatness of the side flange 30 and the lower flange 32 can be ensured even when multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction.

[0272] Reference Figure 16 To illustrate, the anode-side gas-liquid separation chamber 50 is formed by the upper end portion of the first partition wall 82 and the first flange 54 made of the first material.

[0273] The first flange 54 includes a top plate 56 extending in the Y direction from the upper end of the first partition wall 82, a side wall 58 extending downward from the top of the top plate 56, and a dividing plate 60 extending in the Y direction from the lower end of the side wall 58 toward the first partition wall 82. Furthermore, although not shown, an upwardly projecting tab may be provided at the base end of the top plate 56 (the end on the side of the first partition wall 82).

[0274] Reference Figure 16 To illustrate, the cathode-side gas-liquid separation chamber 52 is formed by the upper end portion of the second partition wall 84 and the second flange 62 made of the second material.

[0275] The second flange 62 includes a top plate 64 extending in the Y direction from the upper end of the second partition wall 84, a side wall 66 extending downward from the top of the top plate 64, and a dividing plate 68 extending in the Y direction from the lower end of the side wall 66 toward the second partition wall 84. Furthermore, although not shown, an upwardly projecting tab may also be provided at the base end of the top plate 64 (the end on the side of the second partition wall 84).

[0276] (9th embodiment)

[0277] Next, refer to Figure 18 and Figure 19 A ninth embodiment of the electrolytic cell unit of this utility model will be described. Furthermore, in the ninth embodiment, the same reference numerals are used as in the first embodiment for the same constituent elements, and descriptions are omitted.

[0278] like Figure 18 and Figure 19 As shown, electrode chamber 4 includes an anode chamber 8 formed of a first material and a cathode chamber 10 formed of a second material. The anode chamber 8 and the cathode chamber 10 are connected via a composite plate 80. The composite plate 80 has a layer 80a of the first material and a carbon steel layer 80b.

[0279] For the first and second materials, when the electrolytic cell unit 2 is used for the electrolysis of an aqueous solution of alkali metal chloride, for example, the first material can be titanium (Ti) and the second material can be nickel (Ni).

[0280] (Separator 1, 82)

[0281] like Figure 18 As shown, the first partition wall 82 is disposed at an open interval from the anode 14 in the depth direction (Y direction). The first partition wall 82 is provided with a main portion 82a extending in the vertical direction (Z direction) (see reference). Figure 18 ), and the side portions 82b extending in the width direction (X direction) from the end of the main portion 82a toward the anode 14 in the depth direction (see reference). Figure 19 ), a flange portion 82c extending outward in the width direction from the top of the side portion (refer to) Figure 19 ), and a protrusion 82d that protrudes in the depth direction from the outer end of the flange 82c toward the main portion 82a (see reference). Figure 19 ).

[0282] In addition, such as Figure 18 As shown, the first partition wall 82 is provided with a bottom part 82e extending from the lower end of the main part 82a toward the anode 14 in the depth direction, a flange part 82f extending downward from the top end of the bottom part 82e, and a protrusion part 82g protruding from the lower end of the flange part 82f toward the main part 82a in the depth direction.

[0283] like Figure 19 As shown, multiple first ribs 18 are provided at intervals in the width direction. Each first rib 18 extends in the vertical direction (Z direction). Each first rib 18 has a main portion 18a extending from the anode 14 toward the first partition wall 82 in the depth direction and multiple connecting pieces 18b protruding from the end of the main portion 18a on the partition wall 16 side in the width direction. The end of the main portion 18a on the anode 14 side is connected to the anode 14, and each connecting piece 18b is connected to the main portion 82a of the first partition wall 82.

[0284] like Figure 18 As shown, at the end of the main section 18a on the side of the first partition wall 82, a plurality of cuts 18c are provided at intervals in the vertical direction. The cuts 18c are located between adjacent connecting pieces 18b. Through the plurality of cuts 18c, the flow of liquid and gas in the width direction is ensured within the anode chamber 8.

[0285] (Second partition wall 84)

[0286] like Figure 18 As shown, the second partition wall 84 is disposed at an open distance from the current collector 20 in the depth direction (Y direction). The second partition wall 84, like the first partition wall 82, is provided with a main portion 84a extending in the vertical direction (see reference). Figure 18 ), and the side portions 84b extending in the width direction from the end of the main portion 84a toward the current collector 20 in the depth direction (see reference). Figure 19 ), a flange portion 84c extending outward in the width direction from the top of the side portion 84b (see reference) Figure 19 ), and a protrusion 84d that protrudes in the depth direction from the outer end of the flange 84c toward the main portion 84a (see reference). Figure 19 ).

[0287] In addition, such as Figure 18 As shown, the second partition wall 84 has a bottom portion 84e extending from the lower end of the main portion 84a toward the current collector 20 in the depth direction, a flange portion 84f extending downward from the top end of the bottom portion 84e, and a protrusion portion 84g protruding from the lower end of the flange portion 84f toward the main portion 84a in the depth direction.

[0288] like Figure 19As shown, multiple second ribs 22 are provided at intervals in the width direction, similar to the first ribs 18, and extend in the vertical direction. The multiple second ribs 22 are arranged in the width direction at positions corresponding to the positions of the multiple first ribs 18. Each second rib 22 has a main portion 22a extending from the current collector 20 toward the second partition wall 84 in the depth direction, and multiple connecting pieces 22b protruding in the width direction from the end of the main portion 22a on the second partition wall 84 side. The end of the main portion 22a on the current collector 20 side is connected to the current collector 20, and each connecting piece 22b is connected to the main portion 84a of the second partition wall 84.

[0289] like Figure 18 As shown, at the end of the main part 22a on the side of the second partition wall 84, a plurality of cuts 22c are provided at intervals in the vertical direction. The cuts 22c are located between adjacent connecting pieces 22b. The plurality of cuts 22c ensure the flow of liquid and gas in the width direction within the cathode chamber 10.

[0290] (Composite board 80)

[0291] Multiple composite plates 80 are provided at intervals in the width direction and extend in the vertical direction. The composite plates 80 are disposed between the back of the first partition wall 82 and the back of the second partition wall 84 at positions corresponding to the joint piece 18b of the first rib 18 and the joint piece 22b of the second rib 22.

[0292] Figure 18 and Figure 19 The composite plate 80 shown is a double-layered plate formed by explosive bonding of a first material layer 80a (e.g., a titanium layer) and carbon steel 80b. The first material layer 80a is bonded to the back side of a first partition wall 82 made of the first material, and the carbon steel 80b is bonded to the back side of a second partition wall 84 made of the second material.

[0293] like Figure 19 As shown, the side flanges 30 extend vertically in a pair at their ends in the width direction of both the anode chamber 8 and the cathode chamber 10. In the ninth embodiment, the side flanges 30 are formed by the side surface portion 82b, flange portion 82c, and protrusion 82d of the first partition wall 82, and the side surface portion 84b, flange portion 84c, and protrusion 84d of the second partition wall 84.

[0294] In addition, such as Figure 18 As shown, the lower flange 32 extends along the width direction at the lower ends of both the anode chamber 8 and the cathode chamber 10. In the ninth embodiment, the lower flange 32 is formed by the bottom portion 82e, flange portion 82f, and protrusion 82g of the first partition wall 82, and the bottom portion 84e, flange portion 84f, and protrusion 84g of the second partition wall 84.

[0295] like Figure 18and Figure 19 As shown, in the ninth embodiment, the two end portions 14b and the lower end portion 14c of the anode 14 in the width direction are supported by the protrusion 34. That is, the two end portions 14b of the anode 14 in the width direction are supported by the side protrusion 36 (see reference). Figure 19 The lower end 14c of the anode 14 is supported by the lower protrusion 38 (see reference). Figure 18 Therefore, even in the event of pressure fluctuations within the electrolytic cell, it is possible to prevent the anode 14 from collapsing towards the anode chamber 8, ensuring the flatness of the anode 14. Here, support means that at least a portion of the anode 14 is in contact with the protrusion 34. This also includes cases where it is fixed using methods such as welding or threaded fastening.

[0296] Furthermore, it is permissible for at least one of the two ends 14b and the lower end 14c of the anode 14 in the width direction to be supported by the protrusion 34, but from the viewpoint of ensuring the flatness of the anode 14, it is preferable that, as described above, the two ends 14b and the lower end 14c of the anode 14 in the width direction are supported by the protrusion 34.

[0297] Alternatively, the two ends 14b and the lower end 14c of the anode 14 in the width direction may be supported on the protrusion 34 in a bent state, either or both of the two ends 14b and the lower end 14c in the width direction of the anode 14.

[0298] From the viewpoint of ensuring the flatness of the anode 14, it is preferable that the two ends 14b and the lower end 14c of the anode 14 in the width direction are continuously supported by the protrusion 34 over the entire area in the vertical direction and the width direction, respectively.

[0299] Reference Figure 18 To illustrate, the anode-side gas-liquid separation chamber 50 is formed by the upper end portion of the first partition wall 82 and the first flange 54 made of the first material.

[0300] The first flange 54 includes a top plate 56 extending from the upper end of the first partition wall 82 in the depth direction, a side wall 58 extending downward from the top end of the top plate 56, and a dividing plate 60 extending from the lower end of the side wall 58 toward the first partition wall 82 in the depth direction. Furthermore, although not shown, an upwardly projecting tab may also be provided at the base end of the top plate 56 (the end on the side of the first partition wall 82).

[0301] Reference Figure 18 To illustrate, the cathode-side gas-liquid separation chamber 52 is formed by the upper end portion of the second partition wall 84 and the second flange 62 made of the second material.

[0302] The second flange 62 includes a top plate 64 extending in the Y direction from the upper end of the second partition wall 84, a side wall 66 extending downward from the top of the top plate 64, and a dividing plate 68 extending in the Y direction from the lower end of the side wall 66 toward the second partition wall 84. Furthermore, although not shown, an upwardly projecting tab may also be provided at the base end of the top plate 64 (the end on the side of the second partition wall 84).

[0303] (Additional protrusion 74)

[0304] like Figure 18 and Figure 19 As shown, an additional protrusion 74 is provided on the flange 28, protruding toward the cathode chamber 10 and extending along the inner circumference of the flange 28. The additional protrusion 74 includes a side additional protrusion 76 provided on the inner circumferential surface of the side flange 30 (see reference). Figure 19 ) and the lower additional protrusion 78 provided on the inner peripheral surface of the lower flange 32 (see reference) Figure 18 ).

[0305] like Figure 18 and Figure 19 As shown, in the ninth embodiment, the two end portions 20b and the lower end portion 20c of the current collector 20 in the width direction are supported by the additional protrusion 74. That is, the two end portions 20b of the current collector 20 in the width direction are supported by the side additional protrusion 76 (see reference). Figure 19 The lower end 20c of the current collector 20 is supported by the lower additional protrusion 78 (see reference). Figure 18 Therefore, even in the event of pressure fluctuations within the electrolytic cell unit 2, it is possible to prevent the current collector 20 from collapsing towards the cathode chamber 10, ensuring the flatness of the current collector 20. Here, support means that at least a portion of the current collector 20 is in contact with the additional protrusion 74. This also includes cases where it is fixed using methods such as welding or threaded fastening.

[0306] Furthermore, it is permissible for at least one of the two ends 20b and the lower end 20c of the current collector 20 in the width direction to be supported by the additional protrusion 74. However, from the viewpoint of ensuring the flatness of the current collector 20, it is preferable that, as described above, the two ends 20b and the lower end 20c of the current collector 20 in the width direction are supported by the additional protrusion 74.

[0307] Alternatively, the two ends 20b and the lower end 20c of the current collector 20 in the width direction may be supported on the additional protrusion 74 in a bent state, either or both of the two ends 20b and the lower end 20c in the width direction of the current collector 20.

[0308] From the viewpoint of ensuring the flatness of the current collector 20, it is preferable that the two ends 20b and the lower end 20c of the current collector 20 in the width direction are continuously supported by the additional protrusion 74 over the entire area in the vertical direction and the width direction, respectively.

[0309] Preferably, the additional protrusion 74 is retractable along the depth direction of the cathode chamber 10. When the additional protrusion 74 is retractable along the depth direction of the cathode chamber 10, the inner surface of the flange portion 84c of the side flange 30 can be tightly attached to the outer surface of the side frame 42, and the inner surface of the flange portion 84f of the lower flange 32 can be tightly attached to the outer surface of the lower frame 44.

[0310] The method for inserting the frame 40 into the flange 28 when the additional protrusion 74 can extend and retract along the depth direction of the cathode chamber 10 will be described. Before insertion, the additional protrusion 74 provided on the flange 28 is retracted along the depth direction. From this state, the frame 40 is inserted while expanding the flange 28 along the depth direction using a tool. If the tool is removed after the frame 40 is fully inserted, the additional protrusion 74 retracts along the depth direction of the cathode chamber 10, resulting in the inner surface of the flange portion 84c of the side flange 30 being in close contact with the outer surface of the side frame 42, and the inner surface of the flange portion 84f of the lower flange 32 being in close contact with the outer surface of the lower frame 44.

[0311] When multiple electrolytic cell units 2 are arranged along the depth direction and pressed from both sides or one side of the depth direction, the first flange 54 and the second flange 62 press against each other through a washer (not shown).

[0312] However, even though the first flange 54 and the second flange 62 are pressed against each other through a washer (not shown), the flatness of the side flange 30 and the lower flange 32 can be ensured because the inner surface of the flange portion 84c of the side flange 30 is in close contact with the outer surface of the side frame 42 and the inner surface of the flange portion 84f of the lower flange 32 is in close contact with the outer surface of the lower frame 44.

Claims

1. An electrolytic cell unit comprising an anode chamber and a cathode chamber, characterized in that, This electrolytic cell unit has the following features: An anode, which is disposed in the anode chamber; A current collector, which is disposed in the cathode chamber; A partition wall dividing the anode chamber and the cathode chamber; and The flanges define the two ends and the lower end of the anode chamber in the width direction. The flange is provided with a protrusion that projects toward the anode chamber and extends along the inner circumference of the flange. At least one of the two ends and the lower end of the anode in the width direction is supported by the protrusion.

2. The electrolytic cell unit according to claim 1, characterized in that, The anode is supported on both sides and the lower end in the width direction by the protrusion.

3. The electrolytic cell unit according to claim 1, characterized in that, The protrusion is capable of extending and retracting along the depth direction of the anode chamber.

4. The electrolytic cell unit according to claim 1, characterized in that, The flange defines the two ends and the lower end of the anode chamber and the cathode chamber in the width direction.

5. The electrolytic cell unit according to claim 4, characterized in that, The two ends and the lower end of the partition wall in the width direction are bent toward the cathode chamber and joined to the flange. The two ends and the lower end of the current collector in the width direction are supported by the two ends and the lower end of the partition wall in the width direction.

6. The electrolytic cell unit according to claim 4, characterized in that, The flange is provided with an additional protrusion that projects toward the cathode chamber and extends along the inner circumference of the flange. The two ends and the lower end of the current collector in the width direction are supported by the additional protrusion.

7. The electrolytic cell unit according to claim 6, characterized in that, The additional protrusion is capable of extending and retracting along the depth direction of the cathode chamber.

8. An electrolytic cell unit comprising an anode chamber and a cathode chamber, characterized in that, This electrolytic cell unit has the following features: An anode, which is disposed in the anode chamber; A current collector, which is disposed in the cathode chamber; A partition wall dividing the anode chamber and the cathode chamber; and The flange defines the two ends and the lower end of the cathode chamber in the width direction. The flange is provided with a protrusion that projects toward the cathode chamber and extends along the inner circumference of the flange. At least one of the two ends and the lower end of the current collector in the width direction is supported by the protrusion.

9. The electrolytic cell unit according to claim 8, characterized in that, The two ends and the lower end of the current collector in the width direction are supported by the protrusion.

10. The electrolytic cell unit according to claim 8, characterized in that, The protrusion is capable of extending and retracting along the depth direction of the cathode chamber.

11. The electrolytic cell unit according to claim 8, characterized in that, The flange defines the two ends and the lower end of the anode chamber and the cathode chamber in the width direction.

12. The electrolytic cell unit according to claim 11, characterized in that, The two ends and the lower end of the partition wall in the width direction are bent toward the anode chamber side and joined to the flange. The anode is supported on both sides and the bottom of the partition wall in the width direction.

13. The electrolytic cell unit according to claim 11, characterized in that, The flange is provided with an additional protrusion that projects toward the anode chamber and extends along the inner circumference of the flange. The anode is supported by the additional protrusion at both ends and the lower end in the width direction.

14. The electrolytic cell unit according to claim 13, characterized in that, The additional protrusion is capable of extending and retracting along the depth direction of the anode chamber.

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