JPS5814965Y2 - Electrolytic cell element of ion exchange membrane type electrodialysis equipment - Google Patents

Description

[Detailed description of the invention] This invention is a unitization of an electrolytic cell element consisting of an electrode, an ion exchange membrane or diaphragm, its backing, and separators on both sides, and more specifically, electrolysis of filterless type electrodialysis using an ion exchange membrane. The present invention relates to an electrolytic cell element of an ion exchange membrane type electrodialysis apparatus in which an ion exchange membrane and a backing can be detachably held between two separators which interconnect the electrolytic cell elements constituting the cell.

An electrolytic cell is a device for filter press type ion exchange electrodialysis (hereinafter referred to as electrolysis for simplicity), which is generally used for recovering waste acids and alkalis, and electrolyzing mirabilite and other salts. Each electrolytic cell element consists of an electrode 12, a collected liquid separator 2. Banking 3. Ion exchange membrane 4. and the stock solution separator 5.

These electrolytic cell elements are used by stacking the necessary number of them, but usually the number of electrolytic cell elements per electrolytic cell is 50.
With up to 100 sets, the assembly and disassembly work will be complicated.

In particular, when the same parts are used for the recovered liquid separator 2 and the raw liquid separator 5 as shown in Fig. 1, and they are used alternately and inverted, there is a possibility that defective assembly may occur due to work space when assembling the electrolytic cell element. There is.

Moreover, if the electrolytic cell is energized in parallel to each cell, it is difficult to use the anode material when assembling the electrolytic cell element.
It is necessary to decide during the work whether to use a cathode material, and if a series energization method is used for each cell, the electrode should be a composite electrode with an anode and a cathode integrated, as shown in Figure 1. However, in this case, it is necessary to decide during the work whether the anode or cathode side should face the recovered liquid separator.

Also, depending on the operating conditions, it may be necessary to replace only some parts of these electrolytic cell elements, such as the ion exchange membrane, and in such cases, the electrolytic cell and each electrolytic cell element must be dismantled and dismantled at the site where the electrolyzer is installed. When assembly is carried out, there is a possibility that serious errors may occur.

Considering the complexity of working with electrolyzers and electrolyzer elements, judgments made during disassembly and reassembly, and the possibility of errors arising from these, electrolyzer elements should be made into units as much as possible. It is desired to form a unit in which only consumables can be replaced and other parts can be handled as an integrated unit without having to separate them individually.

Particularly when electrolyzers are used to treat radioactive waste, there are significant constraints on the working environment and working hours, making unitization of electrolytic cell elements a very important issue.

The present invention was developed in response to these requests and issues, and when assembling the electrolytic cell element that constitutes the electrolytic cell of a filter press type electrodialyzer using an ion exchange membrane,
One separator is fixed to one side of the hinge, and the other separator and electrode are fixed to the other side, and the backing and ion exchange membrane are removably sandwiched between the two separators to achieve the desired purpose. has been achieved.

Further, in carrying out the present invention, it is effective to use a means for elastically holding the backing and ion exchange membrane between the two separators by providing spring-type fasteners on both the separators. In particular, it would be more advantageous to use a one-touch structure in which a spring is attached to one separator and a spring retainer is attached to the other separator, and the spring is attached to the spring retainer to secure the element. be.

In order to make the present invention more concrete, the present invention will be explained below with reference to embodiments shown in FIGS. 2 and 3.

As shown in FIG. 2, a hinge 7□ is attached to each edge of the same side of l pairs of opening/closing plates 12, 13 connected by a hinge 7□.
The stock solution separator 5 is fixed to one opening/closing plate 12 via screws 14 via 73, and the composite electrode 1 and the recovered liquid separator 2 are fixed to the other opening/closing plate 13 via an insulating plate 6 via screws 15. It is firmly fixed by.

16.17 is a reinforcing plate for the opening/closing plate 12.12, and one reinforcing plate 17 has a rod-shaped support 18 for reinforcing the triangular cross-sectional structure formed by the hinge 7□ and the opening/closing plate 12.13. Both ends of the support 18 protrude from both sides of the opening/closing plate to form gripping portions for suspending the entire electrolytic cell element.

Therefore, when assembling the electrolytic cell element, as shown in Figure 2A, two backings 3 are sandwiched between the raw liquid separator 5 and the recovered liquid separator 2, and the ion exchange membrane (or diaphragm) 4 is sandwiched between the opening and closing plates. 12. Close 13 and fix both separators 5 and 2 as described below.

At this time, the opening/closing plates 12 and 13 form a chevron-shaped guide with a triangular vertical section with the hinge 7□ as the apex, which is convenient when separating the electrolytic cell element groups that are in close contact with each other. It is.

In addition, when replacing the ion exchange membrane 4, as shown in the opening in Figure 2, after releasing the bond between both separators 5 and 2, open the opening/closing plate 12.13 as shown by the arrow, and the ion exchange membrane 4 can be replaced. It can be exchanged together with the two Banking 3 cards you have.

At this time, the other parts of the electrolytic cell element are divided into two blocks, one containing only the raw liquid separator 5, and the other containing the recovered liquid separator 2 and the electrode 1.

In this way, the two blocks are double hinged 7,.

By connecting with 7□ and 73, all the parts can be made into an integrated unit without having to be separated into individual parts, and when forming a filter press type electrolyzer by pressurizing and compressing with a press, each electrolytic Shrinkage of the width of the tank element can also be easily compensated for by the above-mentioned double hinge, and it can cope with the press pressure while maintaining its role as a fixture for unitization.

In addition, in this invention, in order to improve workability when replacing consumables such as ion exchange membranes and backings, a one-touch spring-type fastener is installed on the block section, which is divided into two parts by a hinge, as shown in Figure 3. Installing tools, assembling electrolytic cell elements, opening operations and removing consumables,
It also facilitates operations such as inserting new parts.

That is, a spring fixing seat 10 and a spring receiver 11 are installed above and below the 1st side of the recovered liquid separator 2, and a spring retainer 9 is installed in the middle of the 1st side of the undiluted solution separator 2, and the L end is pivotally attached to the spring fixing seat 10. spring 8
Both separators 5, 2 sandwich the ion exchange membrane 1 and its banking 3 by engaging the middle part with the spring retainer 9 and then locking the other end with the spring receiver 11.
can be elastically and removably stacked and combined.

The spring-type fastener is not limited to the above, and when assembling an electrolytic cell, it can be used to unfasten an electrolytic cell element in a short time and with easy operation without interfering with adjacent electrolytic cell elements. Any structure is possible as long as it can be separated into two blocks, removed consumables, inserted new parts, and immediately fixed to form an integrated electrolytic cell element.

[Brief explanation of the drawing]

Figure 1A shows an exploded view and an assembled view to show the configuration of a general electrolytic cell element. Figure 3A shows an assembled view and an open view showing an embodiment of the electrolytic cell element of the present invention, and Figure 3A shows a front view and an open view for explaining the spring-type fastener used in the electrolytic cell element of the present invention. FIG. 3 is a side view of main parts. 1... Electrode, 2... Recovery liquid separator, 3...
Backing, 4... Ion exchange membrane, 5... Stock solution separator, 6... Insulating plate, 7... Hinge, 8... Spring, 9... Spring retainer, 10... Spring fixing seat , 11... Spring receiver, 12.13.
・Opening/closing plate.

Claims (1)

[Scope of utility model registration request] 1. In an electrolytic cell element constituting an electrolytic cell of a filter press type electrodialysis device using an ion exchange membrane or a diaphragm, a hinge is inserted between each edge of a pair of opening/closing plates on the same side, respectively, on the same side. One separator is attached to the opening/closing plate, and the other separator and electrode are attached to the other opening/closing plate, and the backing and ion exchange membrane or diaphragm can be detachably held between the two separators. Electrolytic cell element for ion exchange membrane type electrodialysis equipment. 2. The ion exchange membrane according to claim 1 of the utility model registration claim, characterized in that the separator is provided with a spring type fastener for removably holding the backing and ion exchange membrane or diaphragm between both separators. Electrolytic cell element of electrolytic dialysis equipment.