JP2002275674A - Electrolytic cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolytic cell which yields a high energy use efficiency and a high hydroxide gas generation efficiency. SOLUTION: The electrolytic cell is built by horizontally laminating several unit sets, wherein a gasket, an electrode, a gasket and a cell frame are successively connected, and fixing an anode and a cathode to its both ends. The electrode in each unit set is a bipolar electrode, and a gas-flowing pore and an electrolyte-flowing pore are located at the upper and lower parts of the electrode, respectively. Each gasket in each unit set is shaped identically to the electrode and is made of a member corresponding to the outer shell of the electrode. A gas-flowing pore and an electrolyte-flowing pore are established in the parts extending inward from the upper and lower parts, respectively, and each of the extended parts pressurizes the edge of each pore of the electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic cell, and more particularly to an electrolytic cell capable of reducing power consumption and improving electrolysis efficiency.

[0002]

2. Description of the Related Art An electrolytic apparatus, for example, an electrolytic solution containing an electrolyte such as sodium hydroxide or potassium hydroxide is electrolyzed to generate hydrogen gas and oxygen gas (hereinafter referred to as "hydroxy gas"). The decomposition device includes an electrolytic cell that performs electrolysis of the electrolytic solution. Although there are some structural differences, the basic structure of a general electrolytic cell currently in use is that an electrode plate (first electrode plate) having an anode connected to one end is located at one end, and the other end is located at the other end. This is a structure in which an electrode plate (second electrode plate) to which a cathode is connected is located. First and second
A thin bipolar electrode plate and a frame are alternately fixed and installed between the electrode plates. An electrolytic cell having such a structure can provide many electrodes in a narrow space,
A large amount of gas can be generated, the gap voltage is low, and the power consumed to generate a unit gas amount is small.

However, in the electrolytic cell having such a structure, it is not easy to maintain airtightness between the bipolar electrode plates, and there is a limit in increasing the working pressure of the electrolytic cell. On the other hand, a gas discharge hole for allowing the generated hydroxyl gas to pass therethrough and an electrolyte supply hole are provided in the upper and lower portions of the bipolar electrode plate, respectively. If a current is applied to each electrode plate during the electrolysis, the current leaks through each of the holes (the corners at the machined portion), thereby reducing the electrolysis efficiency and causing a problem of wasting energy.

Further, in the electrolytic cell for performing electrolysis, a part of the upper part of the electrode is exposed on the surface of the electrolytic solution, and the generated hydroxyl gas causes a polarization action on the exposed electrode surface.
This also has the defect of causing an internal explosion inside the electrolytic cell. Such a phenomenon occurs because the generated hydroxyl gas pushes a part of the electrolytic solution out of the electrolytic cell. In addition, the electrodes in the electrolytic cell must always be kept in contact with the electrolyte, but if the electrodes are exposed above the surface of the electrolyte, the effective area of the electrodes where electrolysis occurs is reduced, and consequently This increases the current density per unit area of the electrode, thereby shortening the life of the electrode.

The current efficiency of a general filter press type electrolytic cell is 80 to 90%, the voltage efficiency is 58 to 78%,
The power consumed to produce 1,000 liters of hydroxyl gas is 4.5-5.0 kWh and has an inefficient energy consumption structure.

JP-A-6-128780 and Korean Patent Publication No. 1994-6440 describe filter press type electrolytic cells having the above-mentioned structure. The electrolytic cell has a structure in which a large number of cylindrical electrode tubes are arranged around a central pole bar of an anode, and a cylindrical electrode tube of a cathode is surrounded around the outer periphery of the electrolytic cell. The upper and lower parts of the cylindrical electrode are provided with holes for gas and electrolyte flow. When electrolysis is performed inside the electrolytic cell having such a structure, current flows intensively on the upper and lower cut surfaces and the circular hole of the cylindrical electrode, and the current distribution on the surface of the electrode is not uniform, Therefore, the result is that the electrolysis efficiency is reduced. Further, there is a problem that the surface of the upper electrode is exposed to the generated hydroxyl gas in the electrolysis process and the stability is not small.

[0007] Another configuration of a filter press type electrolytic cell is disclosed in Korean Utility Model Publication No. 1996-37441.
No. 1992-18137 and No. 2000-
No. 61953, and the electrolytic baths described in these publications have a structure using a plate-shaped electrode plate. However, in such an electrolytic cell, there is a problem that the electrolytic solution flow hole and the electrode plate processing surface are exposed to the electrolytic solution, and a part of the electrode is exposed to the generated hydroxyl gas. In order to prevent electricity flow through the electrolyte flow holes provided in each electrode plate, there is a structure in which the electrode plates are alternately arranged with a phase difference of 90 ° and the electrolyte flow holes are provided. There is a limit to the distribution of

[0008] In recent years, despite the increasing industrial utilization of hydroxyl gas, which is a non-polluting energy source, as described above, the conventional electrolytic cell for producing hydroxyl gas is characterized by water per unit volume. It is not practical for industrial use because it consumes a lot of power for producing acid gas, has stability problems such as internal explosions and water leaks, and cannot secure heat resistance and durability. It is a fact.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention is to solve the above-mentioned problems of a general electrolytic cell for producing a hydroxyl gas, and is intended to solve the problems of energy efficiency and hydroxyl gas generation efficiency. It is an object of the present invention to provide an electrolytic cell having a higher level.

[0010]

The electrolytic cell of the present invention is an electrolytic cell that performs an electrolysis on an electrolytic solution supplied therein to generate a gas, and a gasket, an electrode, a gasket, and a cell frame are sequentially connected. A large number of unit sets are stacked, and an anode and a cathode are fixed to both ends thereof. The electrode of each unit set is a bipolar electrode, a gas flow hole is provided at the upper part of the electrode, and an electrolyte flow hole is provided at the lower part, and each gasket of each unit set has a shape similar to the shape of the electrode. A member corresponding to the outer portion of the electrode, an extension extending inward from the upper and lower portions is formed, and each extension is provided with a gas flow hole and an electrolyte flow hole, respectively. ing. The upper and lower extensions of each gasket press against the edges of the upper and lower holes of the electrode, respectively. The cell frame of each unit set has a larger standard (size) than the electrodes, and the upper and lower parts are provided with extensions toward the center, and the central part of each extension has a gas flow hole and electrolyte flow. Holes are respectively provided to correspond to the gas flow holes and the electrolyte flow holes of the electrode and each gasket, respectively.

It is preferable that a convex portion having a fixed height is provided along the outer shell on the front and rear surfaces of each cell frame so that the rear and front surfaces of the gaskets located on the front and rear sides are brought into pressure contact with each other. Thereby, the function of the gasket can be improved.

Further, at the edges of the gas flow holes and the electrolyte flow holes on the front and rear surfaces of the main body of each cell frame,
It is preferable that convex portions are provided, respectively, and that the convex portions come into pressure contact with the edges of the holes of the gaskets located at the front and rear.

Further, each cell frame is provided with a first convex portion having a constant width and height on the front surface thereof along the outer peripheral portion, and a rear surface having the same width and depth as the first convex portion on the front surface. A first concave portion is provided, a cylindrical portion having a constant height is provided on each edge of the gas flow hole and the electrolyte solution flow hole on the front surface, and a fixed depth is provided on each edge of each hole on the rear surface. A second concave portion is provided, and a cutout portion having a fixed width is provided on both sides of the cylindrical portion on the front surface and a portion toward the center of the member. Each of the cell frames is provided with an incision having a fixed width. When two cell frames are combined, an incision of a cylindrical portion and an extension of a rear surface of another cell frame are provided on the front surface of one of the cell frames. The incision provided on the surface communicates with the inner space of the electrolytic cell and the cell. Preferably provided a passage connecting the respective holes of the frame.

Further, it is preferable that the electrolytic solution pressurized by the pump is supplied into the electrolytic cell, and the electrolytic solution is maintained in a state filled with the electrolytic solution while the electrolysis is continuously performed in the electrolytic cell. preferable.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The present invention will be described in detail, but the present invention is not limited to these. FIG. 1 is an exploded perspective view showing members constituting a filter press type electrolytic cell of the present invention, and FIG. 2 is an electrolytic cell of the present invention in which each member of FIG. 1 is integrated by using fixing means. FIG. The members constituting the electrolytic cell 100 of the present invention are as follows. Hereinafter, the structures of the electrode, the gasket, and the cell frame will be described.

<Anode electrode 101 and cathode electrode 102>
An anode electrode 101 and a cathode electrode 102 located at both ends of the electrolytic cell 100 have power supply connection bolts 101 on their outer surfaces.
a, 102a are fixed respectively, an electrolyte supply port connection nipple 102b is fixed to the outer surface of one electrode 102, and a gas outlet connection nipple 101b is fixed to the outer surface of the other electrode 101, respectively. The anode electrode 101 and the cathode electrode 102 are integrated by four stay bolts (two in this drawing, but the number is not limited).

<Electrode 20> Anode electrode 101 and cathode electrode 1
A large number of disc-shaped electrodes (bipolar electrodes) 20 are located between 02. At the top of each electrode 20, a hole 21 for hydroxyl gas flow is provided.
However, holes 22 for flowing the electrolytic solution are provided in the lower portion, respectively. When a voltage is applied to the anode electrode 101 and the cathode electrode 102, the corresponding surface of the electrode 20 adjacent to each of the electrodes 101 and 102 is charged with the opposite polarity charge, and the opposite surface is charged with the same polarity charge. Further, the charged electrode 2
The corresponding surface of another electrode 20 adjacent to 0 is charged with a charge having the opposite polarity to the charge charged on the facing electrode surface. Such charging phenomenon is caused by the conductive electrolyte transmitting current to the electrodes. Such a charge-charging phenomenon on the electrode surface occurs in all the electrodes 20, and therefore, a charge of a different polarity is charged on the surface of the facing electrode 20, so that electrolysis to the electrolytic solution located therebetween is caused. Done.

<Cell Frame 10> A ring-shaped cell frame 10 is located between the anode electrode 101 and the electrode 20, between the electrode 20 and the electrode 20, and between the electrode 20 and the cathode electrode 102. I do. The diameter of each cell frame 10 is configured to be slightly larger than the diameter of the electrode 20, and the upper and lower portions of the cell frame 10 have the holes provided at the upper and lower portions of the respective electrodes and the corresponding holes for the hydroxyl gas flow and the electrolyte flow. Holes are provided respectively. Each cell frame 1
The configuration of 0 will be described later with reference to FIGS. 3, 4, and 5.

<Gasket 30> A sealing gasket 30 is provided between each member, that is, between the anode electrode 101, the cell frame 10, the electrode 20, and the cathode electrode 102.
Is located. The gasket 30 has a ring shape, and its diameter is similar to the diameter of the electrode 20. At the upper and lower portions of the gasket 30, there are also provided a hole 31 for a hydroxyl gas flow and a hole 32 for an electrolyte flow corresponding to the holes provided at the upper and lower portions of the electrode 20 and the cell frame 10, respectively. As shown in FIG. 2, holes 31 and 32 provided in each gasket 30 are respectively provided at central portions of extension portions 30A and 30B extending inward from the main body of gasket 30 so as to be circular. I have. Therefore, the electrode 20
When the gaskets 30 are brought into close contact with both surfaces, respectively, the holes 21 and 31, 22 and 32 of both members 20 and 30 are formed.
Are connected to each other, the extended portions 30A and 30B of the gasket 30 are in close contact with the peripheral surfaces of the holes 21 and 22 of the electrode 20 in an airtight state.

FIGS. 3 and 4 are a front view and a rear view, respectively, of a cell frame 10 which is a component of the present invention. FIG. 5 is a cross-sectional view of the cell frame 10 taken along line AA in FIG. 3A and 3B are cross-sectional views for explaining the configuration of the above-described cell frame 10 in more detail. Extension portions 10E-1 and 10E extending toward the center are provided on the upper and lower portions of the ring-shaped cell frame 10.
-2 are respectively constituted, and each extension part 10E-1, 10E
In the center of -2, the above-mentioned hole for the flow of the hydroxyl gas HA and the hole for the flow of the electrolytic solution HB are provided.

In the outer part of the front part of the cell frame 10,
A first protrusion 11A having a constant width and height is provided along the outer portion, and a second protrusion 12A having a fine height is provided inside the first protrusion 11A. Furthermore, the edges of the hydroxyl gas flow hole HA and the electrolyte flow hole HB (that is, each extension 10E-
Third protrusions 13A-1 and 13A-2 each having a certain width and height are also provided on the (1, 1E-2 surface). The central portion of the third convex portion is an empty cylindrical portion 13A-1, 1
3A-2, and the outer diameters of these cylindrical portions are the holes 21 and 31, 2 provided in the gasket 30 and the electrode 20.
2 and 32, respectively. Extension 10
Fourth convex portions 14A-1 and 14A-2 having fine heights are also provided at the central portions of E-1 and 10E-2. On the other hand, the third convex portion 13A-1 provided on the periphery of the hole HA for the hydroxyl gas flow.
At the upper part of the (cylindrical part) and at the lower part of the third convex part 13A-2 provided at the edge of the electrolyte flow hole HB, incisions A11 and A13, which are horizontally incised on both sides, are formed, respectively. , HB, and at the lower part of the third convex part 13A-1 provided at the edge of the hole HA for hydroxyl gas flow and at the upper part of the third convex part 13A-2 provided at the edge of the hole HB for electrolyte flow. Are formed with incisions A12 and A14, respectively, incised toward the center, and communicate the body surface with the holes HA and HB.

A first concave portion 11B having a constant width and depth is provided on the entire outer surface of the rear portion of the cell frame 10 over all members, and a second convex portion 12B having a fine height is provided inside the first concave portion 11B. . Further, third concave portions 13B-1 and 13B-2 each having a constant width and depth are provided at the edges of the hydroxyl gas flow hole HA and the electrolyte solution flow hole HB, respectively.
Fourth convex portions 14B-1 and 14B-2 having a fine height are provided at the central portions of the extension portions 10E-1 and 10E-2. On the other hand, cutouts B11 and B13 are formed on each of the extensions 10E-1 and 10E-2 by cutting out portions extending from the inner circumference of the cell frame main body, and the main body surface and the holes HA and HB are formed.
And each extension part 10E-1, 10E-2
Incisions B12 and B14 are formed in the inner portion in the radial direction to communicate the body surface with the holes HA and HB.

The process of assembling such members to form an electrolytic cell will be described with reference to the drawings. In the following description, for convenience, the hydroxyl gas flow hole formed at the upper part of each member is referred to as an “upper hole”, and the electrolyte solution flow hole formed at the lower part is referred to as a “lower hole”.

First, one unit set (for example, A and B in FIG. 1) is assembled with the gasket 30, the electrode 20, the other gasket 30, and the cell frame 10. When the gasket 30, the electrode 20, and the gasket 30 are brought into close contact with the front surface of the cell frame 10 with the upper holes 31, 21, 31 and the lower holes 32, 22, 32 corresponding to each other, the gasket 30, the electrode 20, and the gasket 3
0 upper holes 31, 21, 31 and lower holes 32, 22,
Reference numeral 32 denotes cylindrical portions 13A-1 provided on the edges of the upper hole HA and the lower hole HB of the main body of the cell frame 10, respectively.
13A-2 is inserted. At this time, gasket 30,
The outer edges of the electrode 20 and the gasket 30 are in close contact with the inner surface of the first convex portion 11A provided on the outer portion of the front surface of the cell frame 10, and the second convex portion 12A and the fourth
The protrusions 14A-1 and 14A-2 come into contact with the rear surfaces of the extensions 30A and 30B of the gasket 30, respectively.
Further, the extended portions 30A and 30B of the gasket 30 located on the front and rear surfaces of the electrode 20 are in close contact with the edges of the upper hole 21 and the lower hole 22 of the electrode 20 at the front and rear.

After assembling a plurality of unit sets A each including the gasket 30, the electrode 20, the gasket 30, and the cell frame 10 in a horizontally stacked state, the unit sets are connected to each other. For convenience, two unit sets A,
The combination of unit sets will be described using B. Also, for convenience, of the two unit sets, the front (see FIG. 7) unit set is a first unit set A, and the rear unit set is a second unit set.
This is referred to as a unit set B.

When the first and second unit sets A and B are connected with reference to the upper hole and the lower hole of each member, the first convex portion 11A provided on the front surface of the cell frame 10 of the second unit set B becomes The first unit set A is inserted into the first concave portion 11B provided on the rear surface of the cell frame 10. Further, cylindrical portions 13A-1, 13A provided on the edges of the holes HA, HB on the front surface of the cell frame 10 of the second unit set B.
A-2 is a second concave portion 13B-1, 13B provided at the edge of each hole on the rear surface of the cell frame 10 of the first unit set A.
-2 respectively. On the other hand, the first unit set A
Convex portion 12B provided on the rear surface of the cell frame 10 of FIG.
The fourth convex portions 14B-1 and 14B-2 press the surface of the front gasket 30 of the second unit set B.

At this time, the holes HA on the front surface of the cell frame 10 of the second unit set B, the cylindrical portions 13A-1 on the edges of HB,
Incisions A11, A12 and A provided in 13A-2
Reference numerals 13 and A14 correspond to the cutouts B11 and B12 and B13 and B14 provided on the rear surface of the extension portions 10E-1 and 10E-2 of the cell frame 10 of the first unit set B, respectively, and provide an open passage. Therefore, the space provided by the rear surface of the cell frame 10 of the first unit set A and the front surface of the cell frame 10 of the second unit set B (in this space, the gasket 3 connected to the cell frame 10 of the second unit set B).
0, electrode 20 and gasket 30 are located. )
It communicates with the holes HA and HB formed in the cell frames 10 of the unit sets A and B, that is, communicates with the gasket 30 and the holes 31, 32 and 21, 22 of the electrode 20.

Therefore, the electrolytic solution supplied from the outside is provided in the lower extension 10E-2 of the rear cell frame 10 in the stacked cell frames 10 in the process of passing through the lower holes of the stacked members. Lower hole HB,
Openings A13, A14 provided in lower cylindrical portion 13A-2 of rear cell frame 10 and incision B1 provided on the surface of lower extension 10E-2 of front cell frame 10.
3, flows into the internal space of the electrolytic cell, i.e., the space provided with a number of gaskets 30, electrodes 20, and cell frames 10 through the passages provided by B14. Similarly, the hydroxyl gas (containing the electrolytic solution) generated in the inner space of the electrolytic cell 100 by the electrolysis is supplied to the upper extension portion 10E of the front cell frame 10 in the stacked cell frames 10. -1 Incisions B11, B1 provided on the surface
2 and cylindrical portion 13A-1 on the edge of rear cell frame 10
Flows into the upper holes HA of the front cell frame 10 through the passages provided by the openings A11 and A12 provided in the above, and thereafter passes through the upper holes of the respective members, and then is discharged to an external collection tank.

In the above-described manner, a set number of unit sets are connected, and an anode electrode 101 and a cathode electrode 102 are connected to both ends of the combined body.
2 by connecting stays 103 with stay bolts 103.
The complete electrolytic cell 100 is assembled as shown in FIG.
That is, the anode electrode 101 and the cathode electrode 102 are located at both ends of a large number of unit sets, and a large number of stay bolts 103 are provided.
Through the bolt holes of both electrode plates. Each unit set is fastened by fitting the dish-shaped spring 104 to both ends of the exposed stay bolt 103 and fastening the nut 105. At this time, each member is pressed with a constant pressure. Here, bushings 106 made of an insulating material (for example, plastic) are fitted into the bolt holes of the anode electrode 101 and the cathode electrode 102 to prevent current leakage. A connection nipple is provided at an upper portion of one end of the electrolytic cell configured as described above and a lower portion of the other end, and a gas outlet and an electrolyte supply port are provided.

The process of injecting the electrolytic solution and the process of discharging the hydroxyl gas are performed between all the unit units and the adjacent units constituting the electrolytic cell, and the space between the electrode of each unit unit and the adjacent unit electrode is applied to the electrolytic solution. Electrolysis is performed.

The cell frame 10 and the gasket 30 used in the present invention will be specifically described as follows. The cell frame 10 is desired to have high electrical insulation, heat resistance, and chemical resistance (chemical resistance) to an alkaline electrolyte. Further, the cell frame 10
Must be able to apply a compressive force from both ends, and therefore must maintain high mechanical strength. As a material for the cell frame, glass reinforced fiber plastic is preferable, and examples thereof include polysulfone, polyimide, polyphenylene sulfide, and polypropylene. These may be used alone or in combination of two or more. Since these materials have good chemical resistance and heat resistance and excellent mechanical strength, the electrolytic cell can be used continuously at 90 ° C. The gasket 30 must have elasticity in addition to the conditions of the cell frame 10. As a material of the gasket 30, an ethylene-propylene copolymer (EPD)
M) or polytetrafluoroethylene (Teflon) is preferably used. These may be used alone or in combination of two or more. Gasket 3
0 preferably has a thickness of 0.3 to 0.5 mm.

The structural and functional characteristics of the electrolytic cell of the present invention as described above will be described below with reference to FIGS. 6 and 7. FIG. 6 is a detailed sectional view of the electrolytic cell for showing the connection relation of the respective members and the moving path of the gas and the electrolytic solution, and FIG. 7 is a detailed view of a portion "B" in FIG.

As shown in FIG. 7, the front gasket 30 and the rear gasket 3 constitute one unit set.
0 is pressed by the second convex portion 12A provided on the front surface of the combined cell frame 10 and the second convex portion 12B provided on the rear surface of the cell frame 10 of another unit set located in front. It has been done. Thereby, the airtight function of the gasket 30 is efficiently increased, and the electrolytic solution and the hydroxyl gas do not flow out.

A ring-shaped gasket 30 of the same standard adheres to both surfaces of one electrode 20, and in particular, each gasket 30 is placed on the periphery of the upper hole 21 and the lower hole 22 of the electrode 20.
Since the surfaces of the extension portions 30A and 30B of the
0 The electric charge charged on the surface is equal to the machining surface of the electrode and each hole 21;
It is possible to prevent the phenomenon of concentration on the machining surface of No. 22. Therefore, the current density can be maintained uniformly over the entire surface of the electrode 20, and the current efficiency can be increased.

As described above, as the electrolysis proceeds, the generated hydroxyl gas increases the pressure inside the electrolytic cell, whereby the upper part of each electrode 20 located on the surface of the electrolytic solution is exposed to the hydroxyl gas. And cause an internal bomb. Therefore, in the present invention, in order to prevent this, the electrolytic solution pressurized by a pump (not shown) is supplied to the electrolytic solution supply port 102b formed at one end of the electrolytic cell 100. The electrolytic solution supplied into the electrolytic cell by the pump is forcibly discharged through the gas outlet together with the generated hydroxyl gas. The discharged hydroxyl gas and the electrolytic solution are separated by an external gas-liquid separator (not shown), and the separated electrolytic solution is supplied again into the electrolytic cell by a pump. By supplying the electrolytic solution using the pump as described above, the inside of the electrolytic cell can always be kept filled with the electrolytic solution even if the electrolysis is continuously performed.

Table 2 shows the results (performance) of the test (electrolysis) performed several times using the electrolytic cell of the present invention having the specifications shown in Table 1.

[0037]

[Table 1]

[0038]

[Table 2]

[0039]

As described above, in the electrolytic cell according to the present invention, the protrusions provided on the cell frame surface are pressed and contacted with the surfaces of the front gasket and the rear gasket constituting each unit unit. In addition, the airtight function of the gasket can be efficiently increased, and the outflow of the electrolytic solution and the hydroxyl gas can be prevented. In addition, the surface of the extended portion of the gasket is pressed against the edges of the gas exhaust hole and the electrolyte supply hole of the electrode, and the phenomenon that electric charges charged on the electrode surface are concentrated on the processed surface of the electrode and the processed surface of each hole. And all the densities can be kept uniform over the entire surface of the electrode. Further, by forcibly supplying the electrolytic solution to the inside of the electrolytic cell through the pump, the level of the electrolytic solution in the electrolytic cell can always be supplied at a constant level, and an effect of preventing an internal explosion in the electrolytic cell can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing members constituting an electrolytic cell of the present invention.

FIG. 2 is a front view showing the electrolytic cell of the present invention, which is configured by combining the members of FIG. 1;

FIG. 3 is a front view of a cell frame which is a component of the present invention.

FIG. 4 is a rear view of a cell frame which is one component of the present invention.

FIG. 5 is a cross-sectional view of the cell frame taken along the line AA of FIG. 3;

FIG. 6 is a detailed cross-sectional view of the electrolytic cell for showing a connection relationship of each member and a gas passage.

FIG. 7 is a detailed view of a “B” part of FIG. 6;

[Explanation of symbols]

 Reference Signs List 10 cell frame 10E-1, 10E-2 (cell frame) extension 20 electrode 21, 31, HA gas flow hole 22, 32, HB electrolyte flow hole 30 gasket 30A, 30B (gasket) extension 100 Electrolyzer 101 Anode electrode 102 Cathode electrode

Claims (6)

[Claims] 1. An electrolytic cell for generating a gas by performing electrolysis on an electrolytic solution supplied therein, wherein a plurality of unit sets in which a gasket, an electrode, a gasket and a cell frame are sequentially connected are laminated, and both ends thereof are provided. The anode of each unit set is a bipolar electrode, a hole for gas flow is provided at the upper part of the electrode, and a hole for electrolyte flow is provided at the lower part of the electrode, and each unit Each gasket of the set has a shape similar to the shape of the electrode, and a member corresponding to the outer portion of the electrode is formed with an extension extending inward from the upper and lower portions, and each extension is disposed therebetween. Pressurize the surrounding area of each hole of the electrode located, gas flow hole and electrolyte flow hole are provided in the vertical extension, respectively, the cell frame of each unit set is larger than the electrode, the upper and lower parts center An extension portion is formed toward the portion, and a gas flow hole and an electrolyte flow hole are respectively provided in a central portion of each extension portion, and a gas flow hole and an electrolyte flow hole of the electrode and each gasket are provided. An electrolytic cell characterized by corresponding to each. 2. The cell frame according to claim 1, wherein a convex portion having a predetermined height is provided along an outer portion of the front and rear surfaces of the cell frame, and a rear surface and a front surface of the gasket located at the front and rear are brought into pressure contact with each other. The electrolytic cell according to claim 1, wherein 3. A convex portion is provided around the gas flow hole and the electrolyte flow hole on the front and rear surfaces of the main body of the cell frame, respectively, and comes into pressure contact with the edges of the gaskets located on the front and rear sides. The electrolytic cell according to claim 1 or 2, wherein: 4. The cell frame is provided with a first convex portion having a constant width and a height along an outer peripheral portion on a front surface thereof, and a rear surface having the same width and depth as the first convex portion on the front surface. A first recess is provided, and a cylindrical portion having a constant height is provided on each edge of the gas flow hole and the electrolyte solution flow hole on the front surface,
A second concave portion having a constant depth is provided on each edge of each hole on the rear surface, and a cutout portion having a constant width is provided on both sides of the front cylindrical portion and toward the center of the member. On both sides and the center of the peripheral concave part of each hole on the rear surface of the hole, a cutout with a fixed width is provided, respectively. When two cell frames are combined, a cylinder is placed on the front of either cell frame. 2. An incision provided on the surface of an extension of a rear surface of another cell frame is communicated with an incision of the cell section, and a passage is provided for connecting the internal space of the electrolytic cell and each hole of the cell frame. The electrolytic cell according to any one of claims 1 to 3. 5. The cell frame is made of polysulfone, polyimide, polyphenylene sulfide or polypropylene, and the gasket is made of ethylene-propylene copolymer (EPDM) or polytetrafluoroethylene (Teflon (registered trademark)). The electrolytic cell according to claim 1, wherein: 6. An electrolytic solution pressurized by a pump is supplied into the electrolytic cell, and while the electrolysis is continuously performed in the electrolytic cell, a state in which the electrolytic solution is filled inside the electrolytic cell is maintained. The electrolytic cell according to any one of claims 1 to 5, characterized in that: