JPH0213488Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a diaphragm-type cylindrical salt water electrolyzer that produces sodium hypochlorite, which is used for disinfection, sterilization, deodorization, decolorization, etc. in water treatment such as water supply and sewage systems. It is.

Conventionally, in salt water electrolyzers in which a diaphragm was interposed between double cylindrical positive and negative electrodes, the diaphragm was supported by pinching the diaphragm provided around the diaphragm porous reinforcing tube to seal it, or by directly attaching the diaphragm. It was common to seal it. However, in this case, the diaphragm is made of synthetic resin fiber cloth, asbestos cloth, etc., so it is soft and tends not to seal properly.
Problems arose, such as hindrance to assembly and disassembly maintenance.

This idea was made with the intention of solving the above problems, and its purpose was to completely seal the diaphragm and to make the entire salt water electrolyzer easy to assemble and disassemble. It is an object of the present invention to provide a salt water electrolytic cell characterized by improvements in the following aspects.

Examples of this invention will be described below based on the drawings.

FIG. 1 shows a longitudinal sectional view of the salt water electrolyzer of this invention. The salt water electrolyzer of this invention has a noble metal coated anode 1 in the center and a stainless steel or mild steel cathode 2 in the outer periphery. Between the heavy cylindrical electrodes, a diaphragm support cylinder 4, in which a diaphragm 3 surrounds a porous part 4b with a large number of holes 4a, 4a, . The upper and lower ends of a triple cylinder formed by the diaphragm support cylinder 4 and the upper cover 5 and the lower cover 6 are attached in a sandwich-like configuration. In this case, the upper lid 5 and the lower lid 6 are attached to each other in a removable manner, and when performing maintenance and disassembly, if the cover 7 located on the upper side of the upper lid 5 is removed, the anode 1 can be removed, and if the upper lid 5 is further removed, the diaphragm can be removed. It is now possible to take out 3.

On the other hand, as shown in FIG. 2, the diaphragm support cylinder 4 has a porous portion 4b in which a large number of holes 4a, 4a, . . . On the upper and lower end sides of the portion 4b, respectively,
It has lower non-porous portions 4c, 4c. The outer periphery of the porous portion 4b of the diaphragm support cylinder 4 is surrounded by a diaphragm 3, and the upper and lower ends of the diaphragm 3 are held by tightening bands 8 that apply elastic force. In this case, the tightening band 8 is composed of a fixing band 8b having a spring 8a in a part thereof, and is wound around the upper and lower ends of the diaphragm 3 surrounded by the diaphragm support cylinder 4 and tightened. It is designed to support and fix. The diaphragm support cylinder 4 configured in this manner is detachably inserted between the positive and negative electrodes 1 and 2, and is connected to the upper and lower non-perforated parts 4c and 4c of the diaphragm support cylinder 4 and the positive and negative electrodes 1 and 2, respectively. 2 and 2 are attached to the upper cover 5 or the lower cover 6 through sealing materials 9, 9 such as O-rings in an air-watertight manner and detachably.

The upper lid 5 has a salt water inlet 1 that communicates between the positive electrode 1 and the diaphragm support cylinder 4 and the outside.
0, formed at a position facing the chlorine gas outlet 11, and a position where the hydrogen gas delivery inlet 12, which communicates between the cathode 2 and the diaphragm support cylinder 4 and the outside, and the hydrogen gas outlet 13 face each other. is formed.
The lower lid 6 also has a caustic soda outlet 14 that communicates between the cathode 2 and the diaphragm support cylinder 4 and the outside.
A pipe 1 extending upward between the cathode 2 and the diaphragm support cylinder 4 is formed at the caustic soda outlet 14.
5 are connected. Meanwhile, a plug 17 having a cooling water inlet 16 is closed at the upper end of the anode 1;
A cooling water outlet 18 is formed on the side of the positive electrode 1 near the bottom of this plug 17 .

The salt water electrolyzer of this invention constructed as described above has a diaphragm 3 surrounded by a porous part 4b of a diaphragm support cylinder 4 inserted between double cylindrical anodes 1 and 2, which is supported by an elastic force such as a spring 8a. Since the diaphragm 3 is held by a tightening band 8 having a means, even if the temperature rises during salt water electrolysis and the diaphragm 3 is stretched due to thermal expansion, the spring 8a can absorb the expansion, and the diaphragm is always 3 can be sealed evenly and reliably. In addition, since the diaphragm is not directly sealed as in the past but is fixed with the tightening band 8, it can be interposed between the anode and anode electrodes 1 and 2 while maintaining the air/water tightness of the sealed portion. The diaphragm 3 can be easily taken out by simply removing the top cover 5, and the diaphragm 3 can be easily cleaned, which is advantageous in terms of maintenance and management, so its utility value is significant.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the salt water electrolytic cell of this invention, and FIG. 2 is a perspective view showing a part of the diaphragm support cylinder in section in this invention. In the figure, 1... Positive electrode, 2... Negative electrode, 3
...Diaphragm, 4...Diaphragm support cylinder, 4a...Hole, 4
b...Porous part, 4c...Non-porous part, 5...Top lid, 6
...Lower lid, 8...Tightening band, 8a...Spring,
8b...Fixed band.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A saltwater electrolytic cell having a diaphragm interposed between double cylindrical positive and negative electrodes, except for both ends of the diaphragm supporting cylinder which is detachably inserted between the positive and negative electrodes. A porous part with a large number of holes is provided on the entire circumference, and the diaphragm is surrounded on the outer periphery of the porous part of the diaphragm support cylinder, and the upper and lower ends of the diaphragm are held by tightening bands that apply elastic force. Both ends of the diaphragm support cylinder on the upper and lower extensions of the diaphragm and the upper and lower ends of the anode and anode electrodes are air-water-tightly and removably attached to upper and lower lids with sealing materials interposed therebetween, respectively. Salt water electrolyzer. 2 Utility model registration claim 1, wherein the tightening band is a fixed band having a spring in a part thereof
Salt water electrolyzer as described in Section.