JPH07185548A - Electrolytic cell - Google Patents

Abstract

PURPOSE:To conduct efficient electrolysis by covering the inner ends of inlets with electrode plates, passing water to be treated flowing into the inlets through a branch pipe, dispersing the water into the inlet chamber formed along the lower edge of each electrode plate and passing the water through the electrode plate. CONSTITUTION:A diaphragm to separate a couple of reaction chambers R1 and R2 having inlets 11a and 12a and outlets 11b and 12b is provided in a casing 10 furnished with the inlets 11a and 12a and outlets 11b and 12b. A current is applied between a couple of electrode plates 30 oppositely arranged in the reaction chambers R1 and R2 to electrolyze the water to be treated flowing from the inlet toward the outlet. The casing 10 is formed from an insulating material, the electrode plates 30 are firmly attached to the casing 10 to cover the inner ends of the inlets 11a and 12a with the electrode plate 30. Besides, inlet chambers R1a and R2a communicated with the inlets 11a and 12a through branch passages (grooves 11f, 12f, 11g and 12g) are formed along the lower edge of the electrode plate 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic cell for electrolytically treating water to be treated.

[0002]

2. Description of the Related Art As one of electrolytic cells, a casing having a pair of inflow ports on the lower side and a pair of outflow ports on the upper side, and a pair of reaction chambers in which the inflow port and the outflow port are opened. An ion-exchangeable membrane that divides the chamber into two chambers, and a pair of electrodes that are disposed in each of the reaction chambers and are opposed to each other are provided. There is an electrolytic cell in which the water to be treated flowing through each of the outlets is electrolyzed, and is proposed in, for example, Japanese Patent Laid-Open No. 4-330987. Further, Japanese Patent Application Laid-Open No. 55-35906 proposes an electrolytic cell employing a rectangular electrode plate as the electrode.

[0003]

In the above-mentioned conventional electrolytic cell, the water to be treated flowing from each inflow port to each outflow port between both electrodes is electrolyzed between both electrodes. However, since the structure in which the water to be treated flows substantially uniformly between both electrodes is not adopted, the water to be treated flows linearly from each inlet to each outlet, and a rectangular electrode plate is used as an electrode. However, there is a problem in that the entire opposing surface does not function effectively and the electrolytic treatment efficiency is poor. In addition, since the water to be treated does not flow substantially uniformly, gas bubbles generated by electrolysis at the location where the flow does not flow easily adhere to the electrode plate and are difficult to be discharged, and this bubble also reduces the efficiency of electrolysis. There is. The present invention has been made to address the above-mentioned problems, and an object of the present invention is to provide an electrolytic cell with high electrolytic treatment efficiency.

[0004]

In order to achieve the above-mentioned object, in the present invention, a casing having a pair of inflow ports on the lower side and a pair of outflow ports on the upper side, and the inside of the casing are used for the above-mentioned flow. An ion-exchangeable diaphragm that divides the inlet and the outlet into a pair of reaction chambers that are divided into two, and a pair of electrode plates that are disposed in each reaction chamber and face each other, and a current is applied between the two electrode plates. In an electrolytic cell in which the water to be treated that flows from the inlets to the outlets between the electrode plates is electrolyzed, the casing is made of an insulating material and the electrode plates are the same casing. The electrode plate covers the inner end of each inflow port, and an inflow chamber communicating with each inflow port through a branch passage is formed along the lower edge of each electrode plate. Yo It was. In addition, an inflow chamber communicating with each of the inlets is formed along a lower edge of each electrode plate, and an outflow chamber communicating with each of the outlets is formed along an upper edge of the electrode plate. I chose Further, a guide is provided between each of the electrode plates and the diaphragm, the guide extending in the vertical direction at a predetermined interval and guiding the flow from each of the inflow chambers to each of the outflow chambers in a substantially linear manner. Further, the casing is composed of a pair of casing plates which are liquid-tightly joined at the peripheral edge via the diaphragm, and a tension applying means for applying a predetermined tension to the diaphragm is integrally provided on the casing plate. It was

[0005]

In the electrolytic cell according to the present invention,
The water to be treated flows from each inflow port to each inflow chamber formed through the branch passage, flows from each inflow chamber to both outflow ports through both electrode plates, and electrolytic treatment is performed between both electrode plates. By the way, in the present invention, the inner end of each inflow port is covered with each electrode plate, and the water to be treated flowing into each inflow port flows through the branch passage to form each inflow formed along the lower edge of each electrode plate. Since the water flows dispersed in the chambers, the distribution of the inflow amount of the water to be treated into the respective inflow chambers is made uniform in the entire inflow chambers. Therefore, the water to be treated flows widely from each inflow chamber to each outflow port and is electrolyzed with high efficiency between the entire widths of both electrode plates. Also,
When each inflow chamber communicating with each inflow port is formed along the lower edge of each electrode plate, and each outflow chamber communicating with each outflow port is formed along the upper edge of the electrode plate. Is because the water to be treated flows almost vertically from each inflow chamber to each outflow chamber, and the bubbles of gas generated by the electrolytic treatment receive the buoyancy force and the force due to the flow of the treated water, so that the bubbles adhere to the electrode plate. It is discharged properly without staying, and the electrolytic treatment efficiency does not deteriorate due to the presence of staying bubbles.

Further, when a guide is provided between each electrode plate and the diaphragm, which extends vertically at a predetermined interval and guides the flow from each inflow chamber to each outflow chamber in a substantially straight line, Since the treated water flows from each inflow chamber to each outflow chamber in a substantially linear manner, it is possible to prevent the flow from being unbalanced, which also improves the electrolytic treatment efficiency. In the case where the casing is composed of a pair of casing plates that are liquid-tightly joined at the peripheral edge via a diaphragm, and a tension applying means for applying a predetermined tension to the diaphragm is integrally provided on the casing plate, , Even if the diaphragm extends, it does not sag,
Even if the distance between both electrode plates is reduced, the diaphragm does not contact the electrode plates. Therefore, the distance between the two electrode plates can be set small, and power can be saved.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. The electrolytic cell A according to the present invention shown in FIGS. 1 and 2.
Is a casing 10 having a pair of inflow ports 11a and 12a below and a pair of outflow ports 11b and 12b above,
Inside the casing 10, a pair of reaction chambers R1 and R2 having inflow ports 11a and 12a and outflow ports 11b and 12b.
Separable ion-exchangeable diaphragm 20 and each reaction chamber R
1 and R2 are provided with a pair of rectangular electrode plates 30 and 30 facing each other, and a pair of guides 40 and 40 provided between the electrode plates 30 and 30 and the diaphragm 20, respectively.

The casing 10 has a casing plate 11 made of an insulating resin shown in FIG. 3, a casing plate 12 made of an insulating resin material shown in FIG. 4, and both casing plates 11 and 12 fixed to each other. 16 bolts 13, 1 spring washer
4 and nuts 15 (see FIG. 1) and the like, and each casing plate 11 and 12 has each inlet 11
a, 12a and outlets 11b, 12b are formed, and stepped holes 11c for attaching the electrode plates 30, 30 are provided.
12c is formed. Further, as shown in FIGS. 3 and 4, each of the casing plates 11 and 12 has rectangular recesses 11d and 12d formed on the opposite surface side, and below the recesses 11d and 12d. Are wide grooves 11e, 12e
And narrow grooves 11f, 12f communicating with the inner ends of the inlets 11a, 12a at the center are formed substantially horizontally, respectively, and a pair of grooves 11g, 12g for communicating these grooves 11e, 12e with 11f, 12f. (The flow rate distribution of the water to be treated from the narrow grooves 11f, 12f to the wide grooves 11e, 12e can be adjusted by changing the arrangement position and the number of these), and are formed substantially vertically. At the center of the upper ends of the recesses 11d, 12d, the outlets 11b, 1
Grooves 11h and 12h communicating with the inner end of 2b are formed substantially horizontally. In addition, the recess 11 of the casing plate 11
A protrusion 11i having a semicircular cross section is formed in a rectangular shape on the outer periphery of d, and correspondingly, a groove 12i into which the protrusion 11i is fitted is formed in a rectangular shape on the outer periphery of the recess 12d of the casing plate 12. There is. The groove 12i is previously filled with an elastic seal member 16. Further, each of the casing plates 11 and 12 has 16 bolt insertion holes 11
j and 12j are formed respectively.

Although the diaphragm 20 is shown thick in FIGS. 1 and 2, it is actually a microporous thin film having a thickness of 0.12 mm and made of polyester nonwoven fabric as an aggregate. As shown, the casing plates 11 and 12 are cut to have substantially the same dimensions, and the respective bolt insertion holes 11j and 1 are cut.
The bolt insertion hole 21 is provided so as to substantially match 2j, and the projections 11i and the groove 12i of both casing plates 11 and 12 in the assembled state as shown in FIG.
By the cooperative action of, the outer circumference is pulled and a predetermined tension is applied.

As shown in FIGS. 1, 2 and 6, each electrode plate 30 is composed of a rectangular electrode plate main body 31 and a nut 32 welded to the approximate center thereof, and each casing plate 11 and 12 rectangular recesses 11d and 12d
Each electrode terminal 50 into the nut 32 and the O-ring 51.
The casing plates 11 and 12 can be screwed in through (stored in the annular groove formed in the electrode terminal 50).
Are closely attached to each other, and in the mounted state, the inner ends of the inlets 11a and 12a and the grooves 11f, 12f and 11 are attached.
g, 12g are entirely covered and a part of the grooves 11e, 12e are covered, and each inflow chamber R1a, R2a communicating with each inflow port 11a, 12a through a branch passage consisting of each groove 11f, 12f and 11g, 12g is provided. The outflow chambers R1b and R2b, which are formed substantially horizontally along the lower edge of the electrode plate 30 and directly communicate with the outlets 11b and 12b, are formed substantially horizontally along the upper edge of each electrode plate 30. .

Each guide 40 is made of an insulating resin material as shown in FIGS. 1, 2, 6 and 7.
The vertical plates 41 to 41 and a pair of upper and lower horizontal plates 42 and 43 fixed to one upper end and one lower end of each of the vertical plates 41 to 41 and connected at a predetermined interval. Each casing plate 1 in which each electrode plate 30 is assembled so that 42 and 43 are on the side of each electrode plate 30.
The recesses 11d and 12d of Nos. 1 and 12 are fitted and fixed, and the vertical plates 41 to 41 have a function of preventing contact between the electrode plates 30 and the diaphragm 20 and the inflow chambers R1a and R1.
The function of linearly guiding the flow from 2a to the outflow chambers R1b, R2b, and the flow rate flowing from each inflow chamber R1a, R2a to the outflow chambers R1b, R2b in cooperation with each electrode plate 30 at the lower horizontal plate 43. A slit-shaped diaphragm S that defines a predetermined amount is formed. The opening area of the slit-shaped diaphragm S is
It can be adjusted by adjusting the mounting position of each electrode plate 30 to each casing plate 11 and 12 in the vertical direction. For this reason, the screw part of each electrode terminal 50 and the stepped hole of each casing plate 11 and 12 can be adjusted. A required gap is provided between 11c and 12c. Further, the cross-sectional shape of each vertical plate 41 is preferably a triangular shape which makes surface contact with the diaphragm 20 and line contact with each electrode plate 30, or a baseball home base shape. With such a shape, the effective area of each electrode plate 30 is reduced. Not only will it not be ejected, but air bubbles will be expelled.

By the way, the electrolytic cell A of the present embodiment has the casing plates 11 and 12 shown in FIGS.
6, each electrode plate 30 is attached using each O-ring 51 and each electrode terminal 50, and then each guide 40 is assembled to form a structure as shown in FIG. 6, for example. It is assembled as shown in FIG. 1 by tightly joining and fixing it with 16 bolts 13, spring washers 14 and nuts 15.

In the electrolytic cell A constructed as described above, the water to be treated is introduced from the inlets 11a and 12a into the grooves 11 respectively.
Flows into the substantially horizontal inflow chambers R1a and R2a through the branch passages composed of f, 12f and 11g and 12g, and goes upward from the respective inflow chambers R1a and R2a toward the outflow chambers R1b and R2b through the two electrode plates 30. To each outflow chamber R1
From b, R2b to the outlets 11b, 12b, electrolysis is performed between the electrode plates 30. By the way, in the present embodiment, each electrode plate 30 is used for each inflow port 11a,
The inner end of 12a, the entire grooves 11f, 12f and 11g, 12g and a part of the grooves 11e, 12e are covered, and the water to be treated flowing into the respective inlets 11a, 12a passes through the branch passages and the respective electrode plates 30. Since the inflow chambers R1a and R2a that are formed substantially horizontally along the lower edge of the water flow in a distributed manner, the distribution of the inflow amount of the water to be treated into the inflow chambers R1a and R2a is made uniform throughout the inflow chambers. . Therefore, the water to be treated flows from the respective inflow chambers R1a, R2a to the respective outflow chambers R1b, R2b substantially uniformly and is electrolyzed substantially uniformly between the entire widths of the electrode plates 30 with high efficiency. In addition, each of the inflow chambers R1a and R2a of the water to be treated is
From the outflow chamber to each of the outflow chambers R1b, R2b is substantially vertical,
The gas bubbles generated by the electrolytic treatment are properly received by the buoyancy force and the force due to the flow of the water to be treated and are accommodated in the outflow chambers R1b and R2b formed above the electrode plates 30, respectively. It is discharged properly without adhering to and staying at 30, and the electrolytic treatment efficiency does not deteriorate due to the presence of staying bubbles.

Further, each electrode plate 30 and the diaphragm 20 are extended vertically at a predetermined interval to guide the flow from the inflow chambers R1a, R2a to the outflow chambers R1b, R2b in a substantially linear manner. A guide 40 is provided, and water to be treated is supplied to each inflow chamber R1.
Since the fluid flows from the a and R2a to the outflow chambers R1b and R2b in a substantially linear manner, it is possible to prevent the flow from being biased and also to improve the electrolytic treatment efficiency. In addition, the projection 1 formed on each casing plate 11 and 12
A predetermined tension is applied to the diaphragm 20 by the 1i and the groove 12i, and even if the diaphragm 20 extends, it does not sag. Therefore, even if the distance between the electrode plates 30 is reduced, the diaphragm 20 contacts the electrode plate 30. There is nothing to do. Therefore, the interval between both electrode plates 30 can be set small, and power can be saved.

In the above embodiment, as shown in FIG. 6 as one example, the inlets 11 are provided above and below the center of the casing plates 11 and 12 corresponding to the top and bottom of the center of each electrode plate 30, respectively.
The invention of claim 1 was carried out in an electrolytic cell provided with a and 12a and outlets 11b and 12b, but as shown schematically in FIG. Correspondingly, at the diagonal positions of the casing plates 11 and 12, the inlets 1
It is also possible to implement the invention of claim 1 in an electrolytic cell provided with 1a, 12a and outlets 11b, 12b. In this case, a branch passage (groove 11) is provided at each inlet 11a, 12a.
g, 12g) and L-shaped grooves 11e, 12 communicating with each other.
e is formed in each of the casing plates 11 and 12, and the grooves 11e and 12e form L-shaped inflow chambers R1a and R2a along the lower and side edges of each electrode plate 30. . The flow from each inflow chamber R1a, R2a to each outflow port 11b, 12b is guided by a guide 40 attached to each electrode plate 30.

Further, in the above embodiment, the grooves 11h and 12h communicating with the inner ends of the outlets 11b and 12b at the center of the upper ends of the recesses 11d and 12d of the casing plates 11 and 12 are substantially horizontal. Although the grooves 11h and 12h are formed, the invention of claim 1 (the invention in which the distribution of the inflow amount of the water to be treated into the inflow chambers R1a and R2a is made uniform in all the inflow chambers) It is also possible to carry out. Further, in the above embodiment, each recess 1
Wide grooves 11e, 12e on the lower side of 1d, 12d and a narrow groove 11 communicating with the inner ends of the inlets 11a, 12a at the center.
Although f and 12f are formed substantially horizontally, respectively, and a pair of grooves 11g and 12g for communicating these grooves 11e and 12e with 11f and 12f are formed to be substantially vertical. A wide groove 11e at the inner end,
12e directly communicates with each groove 11f, 12f
The invention of claim 2 without forming 11g and 12g (the water to be treated flows from each inflow chamber R1a, R2a to each outflow chamber R1b, R).
It is also possible to carry out the invention in which gas bubbles flowing substantially vertically to 2b and being appropriately discharged without the gas bubbles generated by the electrolytic treatment adhering to and staying on each electrode plate 50). Further, in the above embodiment, the inflow chambers R1a and R2a communicating with the inflow ports 11a and 12a through the branch passages (grooves 11f, 12f, 11g and 12g) are arranged substantially horizontally along the lower edges of the electrode plates 30. Once formed, each outlet 11b, 12
Although the outflow chambers R1b and R2b communicating with b are formed substantially horizontally along the upper edge of each electrode plate 30, the invention of claim 4 can be carried out even in a conventional electrolytic cell in which these are not formed. Is possible.

[Brief description of drawings]

FIG. 1 is a central longitudinal side view showing an embodiment of an electrolytic cell according to the present invention.

FIG. 2 is an exploded view of the electrolytic cell shown in FIG.

3 is a front view of the right casing plate alone shown in FIG. 1. FIG.

4 is a front view of the left casing plate alone shown in FIG. 1. FIG.

FIG. 5 is a front view of the diaphragm alone shown in FIG. 1.

FIG. 6 is a front view showing a state where an electrode plate and a guide are assembled to the right casing plate shown in FIG.

7 is a front view of the guide alone shown in FIG. 1. FIG.

FIG. 8 is a view schematically showing another embodiment of the electrolytic cell according to the present invention, which corresponds to FIG.

[Explanation of symbols]

10 ... Casing, 11, 12 ... Casing plate,
11a, 12a ... Inflow port, 11b, 12b ... Outflow port, 1
1f, 12f, 11g, 12g ... Groove (branch passage), 11
i, 12i ... Protrusions, grooves (tension applying means), R1, R2 ...
Reaction chamber, R1a, R2a ... Inflow chamber, R1b, R2b ... Outflow chamber, 20 ... Diaphragm, 30 ... Rectangular electrode plate, 40 ... Guide.

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[Procedure amendment]

[Submission date] October 26, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art As one of electrolytic cells, a casing having a pair of inflow ports on the lower side and a pair of outflow ports on the upper side, and a pair of reaction chambers in which the inflow port and the outflow port are opened. An ion- permeable membrane that divides the chamber into two chambers, and a pair of electrodes that are disposed in each of the reaction chambers and are opposed to each other are provided, and a current is passed between the electrodes to allow passage from the inlets to the electrodes. There is an electrolytic cell in which the water to be treated flowing through each of the outlets is electrolyzed, and is proposed in, for example, Japanese Patent Laid-Open No. 4-330987. Further, Japanese Patent Application Laid-Open No. 55-35906 proposes an electrolytic cell employing a rectangular electrode plate as the electrode.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

In order to achieve the above-mentioned object, in the present invention, a casing having a pair of inflow ports on the lower side and a pair of outflow ports on the upper side, and the inside of the casing are used for the above-mentioned flow. An ion- permeable diaphragm that divides into a pair of reaction chambers in which the inlet and the outlet are open, and a pair of electrode plates that are respectively disposed in each reaction chamber and face each other, and a current is applied between the two electrode plates. In an electrolytic cell in which the water to be treated that flows from the inlets to the outlets between the electrode plates is electrolyzed, the casing is made of an insulating material and the electrode plates are the same casing. The electrode plate covers the inner end of each inflow port, and an inflow chamber communicating with each inflow port through a branch passage is formed along the lower edge of each electrode plate. Yo It was. In addition, an inflow chamber communicating with each of the inlets is formed along a lower edge of each electrode plate, and an outflow chamber communicating with each of the outlets is formed along an upper edge of the electrode plate. I chose Further, a guide is provided between each of the electrode plates and the diaphragm, the guide extending in the vertical direction at a predetermined interval and guiding the flow from each of the inflow chambers to each of the outflow chambers in a substantially linear manner. Further, the casing is composed of a pair of casing plates which are liquid-tightly joined at the peripheral edge via the diaphragm, and a tension applying means for applying a predetermined tension to the diaphragm is integrally provided on the casing plate. It was

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

An embodiment of the present invention will be described below with reference to the drawings. The electrolytic cell A according to the present invention shown in FIGS. 1 and 2.
Is a casing 10 having a pair of inflow ports 11a and 12a below and a pair of outflow ports 11b and 12b above,
Inside the casing 10, a pair of reaction chambers R1 and R2 having inflow ports 11a and 12a and outflow ports 11b and 12b.
Ion- permeable diaphragm 20 that divides the chamber into two parts and each reaction chamber R
1 and R2 are provided with a pair of rectangular electrode plates 30 and 30 facing each other, and a pair of guides 40 and 40 provided between the electrode plates 30 and 30 and the diaphragm 20, respectively.

Claims (4)

[Claims] 1. A casing having a pair of inlets on the lower side and a pair of outlets on the upper side, and an ion-exchanger which divides the inside of the casing into a pair of reaction chambers in which the inlet and the outlet are open. And a pair of electrode plates disposed in each of the reaction chambers and opposed to each other, and by flowing an electric current between the two electrode plates, each of the outflow ports is passed from each of the inflow ports to between the both electrode plates. In an electrolytic cell adapted to electrolyze the water to be treated flowing through the casing, the casing is formed of an insulating material, and the electrode plates are attached in close contact with the casing, and the electrode plates are used to attach the inside of each of the inlet ports. An electrolytic cell, wherein an end is covered and an inflow chamber communicating with each of the inflow ports through a branch passage is formed along a lower edge of each of the electrode plates. 2. A casing having a pair of inflow ports on the lower side and a pair of outflow ports on the upper side, and an ion-exchanger which divides the inside of the casing into a pair of reaction chambers in which the inflow port and the outflow port are open And a pair of electrode plates disposed in each of the reaction chambers and opposed to each other, and by flowing an electric current between the two electrode plates, each of the outflow ports is passed from each of the inflow ports to between the both electrode plates. In an electrolytic cell adapted to electrolyze the water to be treated flowing in, an inflow chamber communicating with each inflow port is formed along a lower edge of each electrode plate, and an outflow chamber communicating with each outflow port. Is formed along the upper edge of the electrode plate. 3. A guide is provided between each of the electrode plates and the diaphragm, the guide extending vertically at a predetermined interval to guide the flow from each of the inflow chambers to each of the outflow chambers in a substantially straight line shape. The electrolytic cell according to claim 2, wherein 4. A casing having a pair of inlets on the lower side and a pair of outlets on the upper side, and the inside of the casing being divided into a pair of reaction chambers in which the inlet and the outlet are open, which are ion-exchangeable. And a pair of electrode plates disposed in each of the reaction chambers and opposed to each other, and by flowing an electric current between the two electrode plates, each of the outflow ports is passed from each of the inflow ports to between the both electrode plates. In an electrolytic cell adapted to electrolyze the water to be treated flowing through the casing, the casing is constituted by a pair of casing plates liquid-tightly joined at the periphery via the diaphragm, and a predetermined tension is applied to the diaphragm. An electrolytic cell, wherein a tension applying means for applying is provided integrally with the casing plate.