JP3389082B2 - Vertical electrolytic cell - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bipolar electrode type vertical electrolytic cell for electrolyzing seawater.

[0002]

2. Description of the Related Art Conventionally, in thermal power and nuclear power plants, seawater desalination plants, chemical plants, etc., which use a large amount of seawater, parts that come into contact with seawater, such as intake ports, pipes, condensers, and various coolers. Adhering and breeding of algae and shellfish has become a big problem. In order to solve this problem, natural seawater is electrolyzed as it is to generate sodium hypochlorite, which is injected into the intake port to effectively prevent the adhesion of marine organisms. The above-described vertical electrode electrolytic cell of the bipolar electrode system is incorporated in such an apparatus.

4 to 5 show an example of a vertical electrode electrolytic cell of a bipolar electrode system for electrolyzing seawater. FIG. 4 is a vertical sectional view of the electrolytic cell, and FIG. It is a C line sectional view. Figure 4
In FIG. 5, reference numeral 100 denotes an electrolytic cell,
Reference numeral 0 is composed of a cylindrical outer cylinder 1 and an upper lid 1a and a lower lid 1b which are formed by closing the upper and lower surfaces thereof, respectively, to form a cylindrical body having a predetermined pressure resistance strength. The lower lid 1b is provided with an inlet nozzle 21 for inflowing seawater, and the upper lid 1a is provided with an outlet nozzle 22 for discharging the seawater. These nozzles 21,
Seawater used for electrolysis flows through the electrolytic cell 100 via 22.

Further, inside the electrolytic bath 100, there is provided an electrode support box 2 having a square tube structure and made of an electrical insulator such as plastic. As shown in FIG. 5, the electrode support box 2 is constructed by arranging first and second support frames 2a and 2b in a quadrangular shape. Inside the electrode support box 2, a plurality of bipolar electrodes 4 are arranged and fixed in parallel at a predetermined gap D and in multiple stages. Specifically, the plurality of bipolar electrodes 4 are superposed in parallel via a spacer 23 having a thickness D, and are supported in a skewered shape by an insulating bolt 24 and fixed between the support frames 2.

FIG. 6 shows a conventional example of a seawater electrolyzer in which a plurality of such vertical electrolytic cells 100 are connected in series. In FIG. 6, reference numeral 1 denotes an outer cylinder, and a plurality of bipolar electrodes 4 supported by an electrode support box 2 are housed in the outer cylinder 1 as in FIGS. 4 to 5.

A plurality (four in this example) of electrolytic cells 100 having such a structure are erected, and the outer cylinder 1 of each electrolytic cell 100 is arranged.
The inlet nozzle 21 and the outlet nozzle 22 of the seawater provided in the above are connected by connecting pipes 13, 14, and 15, and the seawater enters from the first electrolytic cell 100a (the left end in FIG. 6) to the second,
Fourth electrolytic cell 1 through third electrolytic cells 100b, 100c
The seawater flow paths between the electrolyzers 100 are connected in series so as to be discharged from the outlet nozzle 22 of 00d.

In the electrolyzer shown in FIG. 6, seawater enters the electrolytic cell 100 through the inlet nozzle 21 of the first electrolytic cell 100a at the left end and is electrolyzed by the current flowing between the bipolar electrodes 4. Then, the seawater is the first electrolyzer 100.
a to the second and third electrolytic cells 100b, 100c and the fourth
Through the electrolytic cell 100d in series, and in the process, electrolysis is performed according to the above-mentioned procedure and is discharged to the outside from the outlet nozzle 22 of the fourth electrolytic cell 100d.

[0008]

A plurality of vertical electrolytic cells 10 are provided.
In the electrolysis device in which 0 is installed, as shown in FIG. 6, an electrode support box 2 for supporting the bipolar electrode 4 in the outer cylinder 1 is provided.
The required number of electrolyzers 100 for storing the electrolyzers are juxtaposed and the electrolyzers 100 are connected by connecting pipes 13, 14 and 15 so that seawater flows in series.

However, in the electrolytic cell 100,
Since the amount of electrolyzed seawater that can flow in one electrode support box 2 is fixed, when increasing the capacity of the electrolyzer without increasing the amount of electrolyzed seawater, FIG.
As shown in (3), a plurality of electrolytic baths 100 are arranged in parallel.

Therefore, the conventional technique has a problem that when the capacity is increased, the size of the device is increased and the installation space is increased.

In view of the above problems of the prior art, the present invention relates to an electrolyzer for seawater or the like provided with a vertical electrolytic cell, which is small in size and requires a small installation space to increase the capacity. The purpose is to provide.

[0012]

In order to solve the above problems, the present invention accommodates an electrode support box for supporting an electrode in an outer cylinder which is formed in a cylindrical shape and through which an electrolytic solution such as seawater flows. In the vertical electrolytic cell thus formed, the inside of the outer cylinder is divided into a plurality of support box storage chambers, and the electrode support boxes are stored in each of the support box storage chambers. A vertical electrolyzer is proposed in which the above-mentioned support box storage chambers are connected by piping so that the electrolytic liquid flows through the electrode support box in series.

In the invention, preferably,
The support box accommodating chamber of the outer cylinder is formed by radially dividing the outer cylinder center into a plurality of, for example, four equal parts.

According to the invention, the inside of a single outer cylinder is partitioned into a plurality of support box storage chambers, and an electrode support box for supporting electrodes is stored in each storage chamber to store seawater in a plurality of electrodes and electrode support chambers. By connecting the boxes so that they flow in series (direct current), the same function as that of the device in which a plurality of outer cylinders are arranged side by side as in the prior art is achieved, and a plurality of outer cylinders are partitioned into a single outer cylinder as described above. This can be achieved by an extremely small and compact device in which the electrode support box is housed in the room. As a result, the electrolysis capacity can be increased without increasing the installation space, and the number of constituent members can be reduced and the cost can be reduced as compared with the prior art.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be exemplarily described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the constituent parts described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Only.

FIG. 1 is a schematic vertical cross-sectional view of a vertical electrolytic cell for electrolyzing seawater according to an embodiment of the present invention, and FIG. 2 is AA of FIG.
FIG. 3 is a sectional view taken along line B, and FIG.

4 to 5 show the internal structure of a vertical electrolytic cell to which the present invention is applied. 4 to 5,
Reference numeral 100 denotes an electrolyzer, which is composed of a cylindrical outer cylinder 1 made of a pressure-resistant container, and an upper lid 1a and a lower lid 1b formed by closing the upper and lower surfaces thereof, respectively, and has a predetermined withstand pressure strength. Forming a tubular body having. The outer cylinder 1
An inlet nozzle 21 for inflowing seawater into the lower lid 1b of the
Is provided, and the upper lid 1a is provided with an outlet nozzle 22 for discharging the seawater. Seawater used for electrolysis flows through the electrolytic cell 100 through the nozzles 21 and 22.
Since 15,000 to 20,000 ppm of chlorine ions are present in seawater, by electrolyzing the seawater, chlorine ions are produced at the anode and sodium hydroxide at the cathode, and these two substances react to react with the ocean. It produces sodium hypochlorite which has an excellent inhibitory effect on product adhesion.

Further, inside the electrolytic bath 100, there is provided an electrode support box 2 having a square tube structure and made of an electrical insulator such as plastic. As shown in FIG. 5, the electrode support box 2 is constructed by arranging first and second support frames 2a and 2b in a quadrangular shape. Inside the electrode support box 2, a plurality of bipolar electrodes 4 are arranged and fixed in parallel at a predetermined gap D and in multiple stages. Specifically, the plurality of bipolar electrodes 4 are superposed in parallel via a spacer 23 having a thickness D, and are supported in a skewered shape by insulating bolts 24 and fixed between the support frames 2. The above internal configuration is the same as that of the conventional technique.

1 to 3, reference numeral 1 denotes an outer cylinder, and the inside of the outer cylinder 1 is, as shown in FIG. 2, divided into four chambers by a partition wall 6 extending in the longitudinal direction, that is, a support box storage chamber 5 ( 5
a, 5b, 5c, 5d). The support box storage chamber 5 is radially divided into four equal parts by a partition wall 6 inside the outer cylinder 1. The support box storage chamber 5 does not have to be “radially equally divided” as described above, and a plurality of the support box storage chambers 5 may be formed in any shape.

Each of the support box storage chambers 5 contains an electrode 4 having an internal structure as shown in FIGS. 4 to 5 and an electrode support box 2 for supporting the electrode 4. On the other hand, the inlet / outlet flanges 3 are provided at the upper and lower portions of each support box storage chamber 5 in the outer cylinder 1.
An inlet / outlet duct 7 having a port is provided so that seawater can enter / exit into / from each of the support box storage chambers 5 via each of the inlet / outlet ducts 7.

The flow path of seawater passing through each of the four support box storage chambers 5 is constructed as follows. That is, FIG.
In, the seawater inlet pipe 8 a is first connected to the inlet / outlet flange 3 on the lower side of the first support box storage chamber 5 a of the four support box storage chambers 5.

The upper inlet / outlet flange 3 of the first support box storage chamber 5a is connected to the lower inlet / outlet flange 3 of the second support box storage chamber 5b by the connecting pipe 4a, so that the second support box storage chamber 5b can be connected. The upper inlet / outlet flange 3 is connected to the lower inlet / outlet flange 3 of the third support box storage chamber 5c by a connecting pipe 9b, and the upper inlet / outlet flange 3 of the third support box storage chamber 5c is connected to the lower side by a connecting pipe 9c. 4 is connected to the entrance / exit flange 3 on the lower side of the support box storage chamber 5d.

The upper entrance / exit flange 3 of the fourth support box storage chamber 5d is connected to the seawater exit pipe 8b. By connecting these pipes, the first, second, and
A series (series) seawater flow path is formed that flows through the third and fourth support box storage chambers 5a, 5b, 5c, and 5d to reach the seawater outlet pipe 8b.

When the vertical electrolyzer 100 is operated, seawater enters and exits from the seawater inlet pipe 8a at the lower side of the first support box storage chamber 5a of the four support box storage chambers 5 in the outer cylinder 1. The storage chamber 5a via the flange 3 and the entrance / exit duct 7.
It flows from the bottom to the top. The seawater is electrolyzed by the current flowing between the bipolar electrodes 4 supported by the electrode support box 2 in the first support box storage chamber 5a, and then flows out from the upper inlet / outlet flange 3 to connect the connecting pipe 9a. Through it, it flows into the second support box storage chamber 5b from the lower inlet / outlet flange 3.

The seawater is stored in the second support box storage chamber 5b.
The same electrolysis as described above is performed by flowing through the inside from the lower side to the upper side, and flows out from the upper inlet / outlet flange 3 into the third support box storage chamber 5c and flows from the lower side to the upper side in the storage chamber 5c. It is electrolyzed, enters the storage chamber 5d from the lower inlet / outlet flange 3 of the fourth support box storage chamber 5d through the connecting pipe 9c, flows from the lower side to the upper side, and is electrolyzed, and then from the upper side inlet / outlet flange 3 It flows out to the seawater outlet pipe 8b.

Therefore, the seawater flows in series (direct current) from the seawater inlet pipe 8a through the four support box storage chambers 5a, 5b, 5c and 5d, and is electrolyzed in each support box storage chamber, and the seawater outlet. The device is discharged from the pipe 8b to the outside, and four support box storage chambers 5 are formed in the single outer cylinder 1, which is a very small and compact device with a small installation space. The same electrolysis function as that of the above can be exhibited.

[0027]

As described above, according to the present invention, a single outer cylinder is partitioned into a plurality of support box storage chambers, an electrode support box is stored in each storage chamber, and seawater is passed through each storage chamber in series. Since it is configured to flow in the same manner as the electrolytic cell in which a plurality of outer cylinders are arranged side by side as in the prior art, as described above, a very small size in which a plurality of electrode support boxes are housed in a single outer cylinder. It can be accomplished with a compact device.

As a result, the electrolysis capacity can be increased without increasing the installation space, and the number of constituent members can be reduced and a low-cost vertical electrolytic cell can be obtained as compared with the prior art.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a vertical electrolytic cell according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a view on arrow B of FIG.

FIG. 4 is a vertical cross-sectional view showing the internal structure of a vertical electrolytic cell.

5 is a cross-sectional view taken along line CC of FIG.

FIG. 6 is a side view of a vertical electrolytic cell having a plurality of outer cylinders according to a conventional technique.

[Explanation of symbols]

1 outer cylinder 2 electrode support box 3 entrance flange 4 electrodes (2 pole electrodes) 5 (5a, 5b, 5c, 5d) Support box storage room 6 partitions 7 Doorway duct 8a Seawater inlet pipe 8b Seawater outlet pipe 9a, 9b, 9c Connection tube

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) C25B 1/00-15/08

Claims (2)

(57) [Claims] 1. A vertical electrolysis cell, which is formed in a tubular shape and in which an electrode support box for supporting an electrode is housed in an outer cylinder through which an electrolytic solution such as seawater flows, Is divided into multiple parts to provide a support box storage room,
While accommodating the electrode support boxes in each of the support box storage chambers, pipe connection was made between the support box storage chambers so that the electrolytic solution could flow into the electrode support boxes in the support box storage chambers in series. A vertical electrolyzer characterized in that 2. The vertical electrolytic cell according to claim 1, wherein the support box housing chamber of the outer cylinder is formed by radially dividing the outer cylinder center into a plurality of divisions.