WO2013161836A1 - イオン交換膜電解槽 - Google Patents
イオン交換膜電解槽 Download PDFInfo
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- WO2013161836A1 WO2013161836A1 PCT/JP2013/061958 JP2013061958W WO2013161836A1 WO 2013161836 A1 WO2013161836 A1 WO 2013161836A1 JP 2013061958 W JP2013061958 W JP 2013061958W WO 2013161836 A1 WO2013161836 A1 WO 2013161836A1
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- cathode
- ion exchange
- exchange membrane
- electrolytic cell
- rigid
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
- C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/63—Holders for electrodes; Positioning of the electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Definitions
- the present invention relates to an ion exchange membrane electrolytic cell (hereinafter also simply referred to as “electrolytic cell”), and more specifically, an existing bipolar ion in which a cathode partition and a rigid cathode are joined via a plurality of V-shaped springs.
- the present invention relates to an ion exchange membrane electrolytic cell having improved electrolytic performance by a simple technique.
- an anode, an ion exchange membrane, and a hydrogen generation cathode are arranged in close contact with each other in order to lower the electrolysis voltage.
- anode and cathode of the rigid member are accommodated in the electrode chamber, the electrodes are kept in close contact with the ion exchange membrane and the electrode spacing is kept at a predetermined value. Was difficult.
- an electrolytic cell using an elastic material as a material As a means for reducing the distance between the electrodes or the distance between the electrode and the electrode current collector or maintaining it at a substantially constant value, an electrolytic cell using an elastic material as a material is known.
- an electrolytic cell in order to prevent the ion exchange membrane from being damaged by bringing the electrode into close contact with the ion exchange membrane and to keep the distance between the positive and negative electrodes to a minimum, the direction of the distance between the electrodes of at least one of the electrodes The electrode is pressed by an elastic member to adjust the holding pressure.
- this elastic material non-rigid materials such as metal fine wire woven fabric, non-woven fabric and net, and rigid materials such as leaf springs are known.
- Patent Document 1 a metal coil body is mounted between a cathode and a cathode end plate instead of a conventionally used leaf spring or metal mesh body, and the cathode is uniformly pressed in the direction of the diaphragm so that the respective members are brought into close contact with each other.
- An electrolytic cell has been proposed.
- patent document 2 as an improvement technique of patent document 1, a metal coil body is wound around a corrosion-resistant frame to produce an elastic cushion material, and this elastic cushion material is placed between a hydrogen generating cathode and a cathode current collector plate.
- an ion exchange membrane electrolytic cell that is mounted and the hydrogen generating cathode is uniformly pressed against the ion exchange membrane.
- an electrolytic cell unit 40 having an anode chamber 31 having a rigid anode 31a and an anode partition wall 31b and a cathode chamber 32 having a rigid cathode 32a and a cathode partition wall 32b as shown in FIG.
- a so-called zero-gap electrolyzer is known which is arranged continuously through 37.
- a rigid cathode 32 a and a cathode partition wall 32 b are joined via a plurality of V-shaped springs 33, and the rigid cathode 32 a and the ion exchange membrane 37 are adjacent to each other by the reaction force of the V-shaped springs 33.
- the rigid anode of the electrolytic cell unit is closely attached.
- Patent Documents 1 and 2 are also applied to such an ion exchange membrane electrolytic cell for the purpose of preventing damage to the ion exchange membrane 37 and improving electrolytic performance. Improvements are possible. It is also conceivable to change the material of the V-shaped spring 33 to a low resistance material for the purpose of further improving the electrolytic performance. However, the work of replacing the V-shaped spring 33 in the existing bipolar electrode exchange membrane electrolytic cell is a large-scale operation, which is not preferable in terms of time and cost.
- an object of the present invention is to improve the electrolytic performance of a conventional bipolar ion exchange membrane electrolytic cell in which a cathode partition and a rigid cathode are joined via a plurality of V-shaped springs by a simple method. is there.
- the present inventors can easily improve electrolytic performance by minimizing the path of the electrolytic current flowing through the V-shaped spring of the ion exchange membrane electrolytic cell. The present inventors have found that this can be done and have completed the present invention.
- the ion exchange membrane electrolytic cell of the present invention is partitioned by an ion exchange membrane into an anode chamber having a rigid anode and an anode partition, and a cathode chamber having a rigid cathode and a cathode partition, and the rigid cathode and the
- an ion exchange membrane electrolytic cell in which a cathode partition is joined via a plurality of V-shaped springs A conductive member is disposed in the vicinity of the end portion on the opening side of the V-shaped spring, and the V-shaped spring is compressed to electrically connect the V-shaped spring and the conductive member.
- the conductive member preferably has elasticity.
- Another ion exchange membrane electrolytic cell of the present invention is partitioned by an ion exchange membrane into an anode chamber having a rigid anode and an anode partition, and a cathode chamber having a rigid cathode and a cathode partition, and the rigid cathode And an ion exchange membrane electrolytic cell in which the cathode barrier rib is joined via a plurality of V-shaped springs, In the region of the rigid cathode not joined to the plurality of V-shaped springs, a concave portion is formed in the direction of the cathode barrier rib, and the concave portion and the cathode barrier rib are electrically connected. .
- another ion exchange membrane electrolytic cell of the present invention is partitioned by an ion exchange membrane into an anode chamber having a rigid anode and an anode partition, and a cathode chamber having a rigid cathode and a cathode partition, and the rigid cathode And an ion exchange membrane electrolytic cell in which the cathode barrier rib is joined via a plurality of V-shaped springs, By compressing the V-shaped spring, ends on the opening side of the V-shaped spring are electrically connected to each other.
- a metal elastic body and a flexible cathode are disposed on the opposite surface of the rigid cathode on the V-shaped spring joint surface, and the metal elastic As the body, it is preferable to use an elastic cushion material obtained by winding a metal elastic body around a corrosion-resistant frame or a plurality of pairs of comb-shaped flat spring bodies extending obliquely from a flat spring-like body holding member. it can.
- the said metal elastic body is a metal coil body.
- FIG. 4 is a side view of the vicinity of the V-shaped spring viewed from the opening side, (c) is a cross-sectional view taken along line AA, and (d) is a cross-sectional view taken along line BB.
- FIG. 1 It is an expansion partial perspective view of an example of the V-shaped spring vicinity of the ion exchange membrane electrolytic cell which concerns on the 2nd Embodiment of this invention. It is a general
- (A) is a perspective view which shows a suitable example of the corrosion-resistant flame
- (b) is a perspective view which shows a suitable example of an elastic cushion material. It is a fragmentary perspective view which shows a suitable example of a flat spring-like body.
- FIG. 1 It is an enlarged view of the vicinity of the V-shaped spring of Examples 1 to 3 and the conventional electrolytic cell, (a) is Example 1, (b) is Example 2, (c) is Example 3, and (d) is FIG.
- FIG. 1 is a schematic partial sectional view showing an electrical connection of an electrolytic cell unit of an ion exchange membrane electrolytic cell according to a first embodiment of the present invention.
- the electrolytic cell unit 10 is partitioned into an anode chamber 1 having a rigid anode 1a and an anode partition wall 1b, and a cathode chamber 2 having a rigid cathode 2a and a cathode partition wall 2b.
- the rigid cathode 2a and the cathode partition wall 2b are joined via a V-shaped spring 3.
- the anode partition wall 1b and the cathode partition wall 2b have an uneven shape, which increases the rigidity of the electrode chamber made of a thin plate such as titanium or nickel.
- FIG. 2 is an explanatory view of the vicinity of the V-shaped spring 3 of the ion exchange membrane electrolytic cell according to the first embodiment of the present invention
- (a) is a plan view of the vicinity of the V-shaped spring
- (b) of FIG. FIG. 4 is a side view of the vicinity of the V-shaped spring as viewed from the opening side of the V-shaped spring
- (c) is an AA sectional view
- (d) is a BB sectional view.
- a conductive member 4 in the illustrated example, a metal rod-like body
- this conductive member 4 is a gap between adjacent V-shaped springs 3.
- the V-shaped spring 3 and the conductive member 4 are electrically connected when the V-shaped spring 3 is compressed, that is, when the V-shaped spring 3 is crushed.
- FIGS. 3A and 3B are schematic diagrams for explaining electrical connection between the V-shaped spring and the conductive member.
- FIG. 3A shows a state before compression of the V-shaped spring
- FIG. 3B shows a state after compression of the V-shaped spring. is there.
- the electrolytic current flows along the shape of the V-shaped spring 3.
- the electrolytic current passes through the conductive member 4. It flows through the shortest path (see FIG. 1 and FIG. 3B), and power loss in the V-shaped spring 3 can be suppressed.
- a stainless steel rod or plate covered with a nickel mesh can be used.
- the cross-sectional shape of the conductive member 4 is circular, but in the electrolytic cell of the present invention, the cross-sectional shape of the conductive member 4 is not limited to this.
- the cross-sectional shape of the conductive member 4 may be an ellipse, a triangle, a rectangle or the like other than a circle, but the hydrogen gas generated on the surface of the rigid cathode 2a escapes to the opposite side of the ion exchange membrane.
- the rigid cathode 2a and the conductive member 4 are preferably in line contact so as not to interfere. Therefore, the cross-sectional shape of the conductive member 4 is preferably circular or elliptical.
- the conductive member 4 preferably has elasticity.
- the conductive member 4 is a rigid member such as a metal rod-like body, it may be difficult to manufacture the V-shaped spring 3 and the conductive member 4 in full contact. In this case, the contact between the V-shaped spring 3 and the conductive member 4 becomes partial, and the contact resistance cannot be sufficiently reduced. Therefore, by making the conductive member 4 elastic, the contact area between the V-shaped spring 3 and the conductive member 4 can be increased, thereby further reducing the contact resistance. As a result, the V-shaped spring 3 It is possible to minimize the power loss at.
- FIGS. 4A and 4B are diagrams showing a preferable example of the conductive member having elasticity.
- FIG. 4A is a plan view of the conductive member having elasticity
- FIG. 4B is a side view of the conductive member having elasticity.
- the conductive member 4 having elasticity shown in FIG. 4 is obtained by fixing a conductive mesh 4b to a metal rod-shaped body 4a by welding or the like in a bent state. It is not restricted to this, In addition, you may use the cylinder etc. which were produced with meshes, such as nickel.
- a metal elastic body 5 (metal coil body in the illustrated example) is provided on the opposite surface of the rigid cathode 2a to the V-shaped spring 3 joint surface. It is preferable that the flexible cathode 6 is disposed so as to overlap in order. Thereby, the zero gap between the rigid cathode 2a and the ion exchange membrane 7 generated by compressing the V-shaped spring 3 is achieved. That is, the metal elastic body 5 uniformly presses the flexible cathode 6 in the direction of the ion exchange membrane 7, so that the flexible cathode 6 and the ion exchange membrane 7 are adjacent to each other without damaging the ion exchange membrane 7.
- the rigid anode of the electrolytic cell unit to be in close contact with each other. Thereby, the electrolysis performance of the ion exchange membrane electrolytic cell can be improved.
- FIG. 5 is a schematic partial sectional view showing an electrical connection of an electrolytic cell unit of an ion exchange membrane electrolytic cell according to a second embodiment of the present invention.
- the electrolytic cell unit 20 is partitioned into an anode chamber 11 having a rigid anode 11a and an anode partition wall 11b, and a cathode chamber 12 having a rigid cathode 12a and a cathode partition wall 12b.
- the rigid cathode 12a and the cathode partition wall 12b are joined via a V-shaped spring 13.
- the anode partition wall 11b and the cathode partition wall 12b have an uneven shape, which increases the rigidity of the electrode chamber made of a thin plate such as titanium or nickel.
- FIG. 6 is an enlarged partial perspective view of an example in the vicinity of the V-shaped spring of the ion exchange membrane electrolytic cell according to the second embodiment of the present invention.
- a region where the plurality of V-shaped springs 13 of the rigid cathode 12 a are not joined (adjacent V-shaped springs are between each other and surrounded by a circle in FIG. 6.
- a recess 18 is formed in the region S), and this recess 18 is brought into direct contact with the cathode partition 12b.
- the electrolytic current that has conventionally flowed through the V-shaped spring 13 flows to the cathode partition 12b without passing through the V-shaped spring 13 (see FIG. 5), and power loss is minimized.
- the method of providing the concave portion 18 in the rigid cathode 12a is not particularly limited.
- the concave portion 18 may be formed using a metal hammer.
- the contact resistance can be reduced by fixing the recess 18 and the cathode partition 12b by TIG welding or the like.
- the electrolytic cell according to the second embodiment of the present invention is different from the electrolytic cell according to the first embodiment in that it is not necessary to introduce another member, and the cathode partition 12b is added to the existing rigid cathode 12a. Since only the recessed part 18 which goes is provided, it has the advantage that the process is easy.
- the metal elastic body 15 metal coil body in the illustrated example
- the flexible cathode 16 are sequentially stacked on the surface opposite to the joint surface of the V-shaped spring 13 of the rigid cathode 12a. It is preferable to be made. Thereby, the gap between the rigid cathode 12 a and the ion exchange membrane 17 generated by compressing the V-shaped spring 13 is made zero gap by the metal elastic body 15 and the flexible cathode 16.
- FIG. 7 is a schematic partial cross-sectional view showing the electrical connection of the cathode chamber of the ion exchange membrane electrolytic cell according to the third embodiment of the present invention.
- the electrolytic cell unit 30 is partitioned into an anode chamber 21 having a rigid anode 21a and an anode partition wall 21b, and a cathode chamber 22 having a rigid cathode 22a and a cathode partition wall 22b.
- the rigid cathode 22 a and the cathode partition wall 22 b are joined via a V-shaped spring 23.
- the anode partition wall 21b and the cathode partition wall 22b have an uneven shape, which increases the rigidity of the electrode chamber made of a thin plate such as titanium or nickel.
- the electrolytic cell which concerns on the 3rd Embodiment of this invention, when the V-shaped spring 23 is compressed, the edge parts by the side of the opening of the V-shaped spring 23 contact and are electrically connected. Yes. That is, the V-shaped spring 23 is completely crushed. By adopting such a state, the electrolytic current that has conventionally flowed along the shape of the V-shaped spring 23 flows through the shortest path, and power loss can be minimized. By fixing the ends of the V-shaped springs 23 by TIG welding or the like, the contact resistance can be further reduced. Note that the electrolytic cell according to the third embodiment also has an advantage of easy processing because it is not necessary to introduce a new member.
- a metal elastic body 25 (in the illustrated example, a metal coil body) and a flexible member are provided on the surface opposite to the joint surface of the V-shaped spring 23 of the rigid cathode 22a. It is preferable that the conductive cathode 26 is disposed in an overlapping manner. Thus, the gap between the rigid cathode 22 a and the ion exchange membrane 27 generated by compressing the V-shaped spring 23 is made zero by the metal elastic body 25 and the flexible cathode 26. In the present embodiment, since the V-shaped spring 23 is crushed, it is more elastic than the electrolytic cells 10 and 20 according to the first and second embodiments. The thickness of the body 25 is required.
- metal coil bodies are exemplified as the metal elastic bodies 5, 15 and 25, but the ion exchange membrane electrolysis of the present invention is used.
- the metal elastic bodies 5, 15 and 25 are made of a conductive material and have elastic properties, and the flexible cathodes 6, 16, and 26 are replaced with ion exchange membranes 7, 17 respectively. 27, there is no particular limitation as long as it can be supplied with power by being pressed.
- a flat plate spring-like body extending from the flat spring-like body holding member, which will be described later, may be used.
- nickel exhibiting good corrosion resistance nickel exhibiting good corrosion resistance, such as nickel, nickel alloy, stainless steel, or copper having low specific resistance. It can be obtained by processing a wire manufactured by coating a wire etc. with plating or the like into a spiral coil by roll processing.
- the cross-sectional shape of the obtained wire is preferably a circle, an ellipse, a rectangle with rounded corners, or the like from the viewpoint of preventing damage to the ion exchange membrane.
- NiW2201 nickel wire having a diameter of 0.17 mm
- a coil wire having a cross-sectional shape of about 0.05 mm ⁇ 0.5 mm with rounded corners and a winding diameter of about 6 mm is obtained. be able to.
- the metal elastic bodies 5, 15 and 25 are directly used as the rigid cathodes 2 a, 12 a and 22 a and the flexible cathodes 6, 16 and 26 in the electrolytic cell.
- an elastic cushion material formed by winding a metal coil body around a corrosion-resistant frame may be used instead of the metal coil body.
- FIG. 8A is a perspective view showing a preferred example of the corrosion-resistant frame used for the elastic cushion material
- FIG. 8B is a perspective view showing an example of the elastic cushion material.
- the corrosion-resistant frame 50 according to the present invention is composed of a metal round bar and a reinforcing rod 52 spanned between a pair of round bars in the longitudinal direction of a rectangular frame 51. ing.
- a metal round bar for example, a nickel round metal bar having a diameter of about 1.2 mm can be suitably used.
- the elastic cushion material 53 according to the present invention winds a metal elastic body 54 (a metal coil body in the illustrated example) over almost the entire length between a pair of round bars in the longitudinal direction of the corrosion-resistant frame 50. Can be obtained (FIG. 8B).
- the elastic cushion material 53 thus obtained is held in the shape of the corrosion-resistant frame 50 because the metal elastic body 54 is wound around the corrosion-resistant frame 50, and the metal elastic body 54 is held from the corrosion-resistant frame 50.
- the metal elastic body 54 can be handled as being integrated with the corrosion-resistant frame 50 with little separation. By winding the metal elastic body 54 around the corrosion resistant frame 50, the following advantages can be obtained.
- the metal elastic body 54 since the metal elastic body 54 has a high deformation rate, it is difficult to handle, and it is often difficult to install the metal elastic body 54 at a predetermined location of the electrolytic cell as intended by the worker. Furthermore, since it is easily deformed (the strength is insufficient), even if it is once installed at a predetermined location of the electrolytic cell, it is displaced by the electrolytic solution or generated gas in the electrolytic cell, and it becomes difficult to uniformly adhere each member.
- the elastic cushion material 53 is composed of, for example, a frame with four rectangular corrosion-resistant frames as shown in FIG. It can be obtained by winding the metal elastic body 54 between the two facing each other so as to obtain a substantially uniform density (see FIG. 8B).
- a metal coil body has been described as an example of the metal bullet body used for the elastic cushion material. However, in addition to the metal coil body, the metal elastic body such as a metal nonwoven fabric is used. May be used.
- the diameter of the metal coil body (the apparent diameter of the coil).
- the diameter of the metal coil body (the apparent diameter of the coil).
- a metal coil body with a small wire diameter is used, the number of contact points between the rigid cathodes 2a, 12a, 22a and the flexible cathodes 6, 16, 26 and the elastic cushion material is inevitably increased, and uniform contact is possible. become.
- the elastic cushion material 53 after being mounted on the electrolytic cell is held in its shape by the corrosion-resistant frame 50, the elastic cushion material 53 is hardly subjected to plastic deformation, and is almost always reassembled when the electrolytic cell is disassembled and reassembled. Can be used.
- FIG. 9 is a partial perspective view showing a preferred example of a flat spring-like body that can be used in the ion exchange membrane electrolytic cell of the present invention.
- all the flat springs may extend obliquely in the same direction.
- adjacent flat springs 60 face each other diagonally. Those extending in the range are preferred. If the flat spring members 60 extend in opposite directions, a force acts only in the vertical direction on the flexible cathode. For this reason, the flexible cathode moves only in the horizontal direction, and problems such as damage to the surface of the ion exchange membrane can be avoided.
- the tip of the flat spring-like body 60 has a contact portion 60a that is bent substantially in parallel with the flat spring-like body holding portion 61 and is in contact with the flexible cathode as shown in the figure.
- the contact portion 60a it is possible to avoid the flat spring-like body 60 from damaging the flexible cathode, and to improve the contact between the flexible cathode and the ion exchange membrane.
- the flat spring-like body is made by cutting a plate material and then making the cut, but the flat spring-like body is made by joining the spring-like body to the flat plate by an arbitrary method. May be.
- metal elastic member according to the ion exchange membrane electrolytic cell of the present invention has been described using a metal coil body, an elastic cushion material, and a flat spring-like body as examples, but the ion exchange membrane electrolytic cell of the present invention has been described.
- metal fine wire may be used, and a metal nonwoven fabric may be used.
- metal elastic bodies include metal wire knitted fabrics, woven fabrics and laminates thereof, or three-dimensionally knitted or three-dimensionally knitted and then subjected to swell processing or the like. You may use the thing of the shape.
- the rigid cathodes 2a, 12a, 22a and the flexible cathodes 6, 16, 26 are used. If an elastic cushion material or the like is positioned on the substrate and thereafter assembled as usual, an ion exchange membrane electrolytic cell in which the elastic cushion material or the like is held at a predetermined position is obtained.
- the assembly of the elastic cushion material using the metal elastic body is an operation outside the electrolytic cell, it can be easily performed, and the obtained elastic cushion material is connected to the target electrode in the electrolytic cell at the time of the electrolytic cell assembly.
- the mounting current collector may be mounted so as to be electrically connected. Even at the time of wearing, the elastic cushion material itself is not deformed so as to hinder assembly due to the strength of the corrosion-resistant frame, so that it can be easily installed at a predetermined location.
- electricity is usually flowed by a contact energization method.
- the ion exchange membrane electrolytic cell of the present invention is partitioned by an ion exchange membrane into an anode chamber having an anode and an anode partition, and a cathode chamber having a rigid cathode and a cathode partition, and the rigid cathode is joined to the cathode partition.
- the present invention relates to an improvement of an ion exchange membrane electrolytic cell supported by a plurality of V-shaped springs, and it is only important to satisfy the above-mentioned configuration, and other structures are conventionally used. Can be used as appropriate, and is not particularly limited.
- the flexible cathodes 6, 16, and 26 are particularly limited as long as they are pressed by the metal elastic bodies 5, 15, 25 or the elastic cushion material and come into contact with the ion exchange membranes 7, 17, 27.
- any material can be used as long as it is used for electrolysis, but the catalyst film is thin and highly active, and the surface of the film is smooth, and the ion exchange membrane is mechanical.
- Pyrolytic active cathodes selected from the group consisting of Ru—La—Pt, Ru—Ce, Pt—Ce, and Pt—Ni are preferred.
- Example 1 The ion exchange membrane is partitioned into an anode chamber having a rigid anode and an anode partition, and a cathode chamber having a rigid cathode and a cathode partition, and the rigid cathode is supported by a plurality of V-shaped springs joined to the cathode partition.
- V-shaped spring of an existing ion exchange membrane electrolytic cell manufactured by Chlorine Engineers Co., Ltd .: BiTAC (registered trademark)
- What was welded was arrange
- a coil wire having a width of about 0.5 mm was produced by rolling a nickel wire (NW2201) having a wire diameter of 0.17 mm and a tensile strength of 620 to 680 N / m 2 .
- a metal coil body having a coil winding diameter of about 6 mm was produced.
- This metal coil body is wound around a nickel round bar frame (corrosion-resistant frame) with a diameter of 1.2 mm to adjust the shape to a rectangular parallelepiped shape, and an elastic cushion material having an approximate size of 10 mm thick ⁇ 110 mm wide ⁇ 350 mm long Produced.
- the coil linear density of this elastic cushion material was about 7 g / dm 2 .
- the obtained elastic cushion material was inserted between the rigid cathode and the flexible cathode so that the elastic cushion material was elastic, and electrolysis was performed at a current density of 4 kA / m 2 for 30 days.
- the anode used was a dimensionally stable electrode manufactured by Permerek Electrode Co., Ltd.
- the flexible cathode was an active cathode of a nickel micromesh substrate
- the rigid cathode was nickel expanded metal.
- the reaction surface sizes of the anode and the cathode were 110 mm in width and 1400 mm in height, respectively.
- As the ion exchange membrane Flemion F-8020 manufactured by Asahi Glass Co., Ltd. was used.
- Example 2 A conductive member is not arranged in the vicinity of the end of the V-shaped spring on the opening side, and a recess other than the V-shaped spring contact portion of the rigid cathode is recessed using a metal hammer, and this recess is brought into contact with the cathode partition. It was. Then, this contact part was fixed by TIG welding. Except for this, electrolysis was performed in the same procedure as in Example 1.
- Example 3 The V-spring was completely crushed, and electrolysis was performed in the same procedure as in the example except that a metal coil body having a winding diameter of 8 mm and a flexible cathode were sequentially stacked on top of each other.
- Electrolysis was performed as usual using BiTAC (registered trademark) manufactured by Chlorine Engineers Co., Ltd.
- Conductors were welded to both ends of the V-shaped springs of the electrolytic cells of Examples 1 to 3 and the conventional example, and the potential difference was measured with a digital voltmeter.
- 10 (a) to 10 (d) are enlarged views of the vicinity of the V-shaped springs of the electrolytic cells of Examples 1 to 3 and the conventional example, (a) being Example 1, (b) being Example 2, ( c) is Example 3, and (d) is a conventional example.
- w in a figure is a welding position of conducting wire.
- Example 1 was 13 mV
- Example 2 was 10 mV
- Example 3 was 7 mV, and it was confirmed that the voltage could be reduced as compared with the conventional example.
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Abstract
Description
前記V字バネの開口側の端部近傍に導電性部材が配置され、該V字バネが圧縮されることにより、前記V字バネと前記導電性部材が電気的に接続されてなることを特徴とするものである。
前記複数のV字バネと接合していない剛性陰極の領域に、陰極隔壁方向に向けて凹部が形成され、該凹部と陰極隔壁とが電気的に接続されてなることを特徴とするものである。
前記V字バネが圧縮されることにより、該V字バネの開口側の端部同士が電気的に接続されてなることを特徴とするものである。
本発明のイオン交換膜電解槽は、複極式電解槽ユニットの所定個数が、イオン交換膜を介して積層されて組み立てられてなる。図1は、本発明の第1の実施の形態に係るイオン交換膜電解槽の電解槽ユニットの電気的接続を示す概略部分断面図である。図示するように、電解槽ユニット10は、剛性陽極1aと陽極隔壁1bとを有する陽極室1と、剛性陰極2aと陰極隔壁2bとを有する陰極室2と、に区画されている。また、剛性陰極2aと陰極隔壁2bとはV字バネ3を介して接合されている。なお、図示例においては、陽極隔壁1bと陰極隔壁2bは凹凸を有する形状であり、チタン、ニッケル等の薄板で作製した電極室の剛性を高めている。
本発明の第2の実施の形態においても、イオン交換膜電解槽は、複極式の電解槽ユニットの所定個数が、イオン交換膜を介して積層されて組み立てられてなる。図5は、本発明の第2の実施の形態に係るイオン交換膜電解槽の電解槽ユニットの電気的接続を示す概略部分断面図である。図示するように、電解槽ユニット20は、剛性陽極11aと陽極隔壁11bとを有する陽極室11と、剛性陰極12aと陰極隔壁12bとを有する陰極室12と、に区画されている。また、剛性陰極12aと陰極隔壁12bとはV字バネ13を介して接合されている。なお、図示例においては、陽極隔壁11bと陰極隔壁12bは凹凸を有する形状であり、チタン、ニッケル等の薄板で作製した電極室の剛性を高めている。
本発明の第3の実施の形態においても、やはり、イオン交換膜電解槽は、複極式の電解槽ユニットの所定個数が、イオン交換膜を介して積層されて組み立てられてなる。図7は、本発明の第3の実施の形態に係るイオン交換膜電解槽の陰極室の電気的接続を示す概略部分断面図である。図示例においては、電解槽ユニット30は、剛性陽極21aと陽極隔壁21bとを有する陽極室21と、剛性陰極22aと陰極隔壁22bとを有する陰極室22と、に区画されている。また、剛性陰極22aと陰極隔壁22bとはV字バネ23を介して接合されている。なお、図示例においては、陽極隔壁21bと陰極隔壁22bは凹凸を有する形状であり、チタン、ニッケル等の薄板で作製した電極室の剛性を高めている。
<実施例1>
イオン交換膜により、剛性陽極と陽極隔壁とを有する陽極室と、剛性陰極と陰極隔壁とを有する陰極室と、に区画され、剛性陰極が陰極隔壁に接合された複数のV字バネにより支持されてなる既存のイオン交換膜電解槽(クロリンエンジニアズ株式会社製:BiTAC(登録商標))のV字バネの開口側端部近傍に、SUS310Sからなる直径3.0mmの棒状体に導電性メッシュを溶接したものを導電性部材として配置した。その後、隣り合うV字バネ間からのぞく導電性部材と陰極メッシュをティグ溶接により固定した。
V字バネの開口側の端部近傍に導電性部材を配置せず、剛性陰極のV字バネ接触部以外を、金槌を用いて凹ませて凹部を形成し、この凹部を陰極隔壁に接触させた。その後、この接触部をティグ溶接により固定した。これ以外は、実施例1と同様の手順で電解を行った。
V字バネを完全に押し潰して、その上に巻き径が8mmの金属製コイル体および可撓性陰極を、順に重ねて配置したこと以外は実施例と同様の手順で電解を行った。
クロリンエンジニアズ株式会社製:BiTAC(登録商標)を用いて通常通り電解を行った。
1a、11a、21a、31a 剛性陽極
1b、11b、21b、31b 陽極隔壁
2、12、22、32 陰極室
2a、12a、22a、32a 剛性陰極
2b、12b、22b、32b 陰極隔壁
3、13、23、33 V字バネ
4 導電性部材
4a 金属製棒状体
4b 導電性メッシュ
5、15、25 金属製弾性体
6、16、26 可撓性陰極
7、17、27、37 イオン交換膜
18 凹部
10、20、30、40 電解槽ユニット
50 耐食性フレーム
51 長方形枠
52 補強杆
53 弾性クッション材
54 金属製弾性体
60 平板バネ状体
60a 先端部
61 平板バネ状体保持部
Claims (8)
- イオン交換膜により、剛性陽極と陽極隔壁とを有する陽極室と、剛性陰極と陰極隔壁とを有する陰極室と、に区画され、前記剛性陰極と前記陰極隔壁とが複数のV字バネを介して接合されてなるイオン交換膜電解槽において、
前記V字バネの開口側の端部近傍に導電性部材が配置され、該V字バネが圧縮されることにより、前記V字バネと前記導電性部材が電気的に接続されてなることを特徴とするイオン交換膜電解槽。 - 前記導電性部材が弾性を有する請求項1記載のイオン交換膜電解槽。
- イオン交換膜により、剛性陽極と陽極隔壁とを有する陽極室と、剛性陰極と陰極隔壁とを有する陰極室と、に区画され、前記剛性陰極と前記陰極隔壁とが複数のV字バネを介して接合されてなるイオン交換膜電解槽において、
前記複数のV字バネと接合していない剛性陰極の領域に、陰極隔壁方向に向けて凹部が形成され、該凹部と陰極隔壁とが電気的に接続されてなることを特徴とするイオン交換膜電解槽。 - イオン交換膜により、剛性陽極と陽極隔壁とを有する陽極室と、剛性陰極と陰極隔壁とを有する陰極室と、に区画され、前記剛性陰極と前記陰極隔壁とが複数のV字バネを介して接合されてなるイオン交換膜電解槽において、
前記V字バネが圧縮されることにより、該V字バネの開口側の端部同士が電気的に接続されてなることを特徴とするイオン交換膜電解槽。 - 前記剛性陰極のV字バネ接合面の反対面に、金属製弾性体と可撓性陰極とが重ねて配置されてなる請求項1~4のうちいずれか一項記載のイオン交換膜電解槽。
- 前記金属製弾性体が、耐食性フレームに金属製弾性体を巻回してなる弾性クッション材である請求項5記載のイオン交換膜電解槽。
- 前記金属製弾性体が金属製コイル体である請求項5記載のイオン交換膜電解槽
- 前記金属製弾性体が、平板バネ状体保持部材から傾斜して延びる複数対の櫛状の平板バネ状体である請求項5記載のイオン交換膜電解槽。
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