JP4302386B2 - Electrolyzer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention is used in a sodium hypochlorite generator, a free chlorine generator, etc. that electrolyzes an electrolyte such as diluted salt water or natural water to produce sodium hypochlorite, free chlorine, etc.RudenIt relates to a solution device.
[0002]
[Prior art]
For example, a sodium hypochlorite generator used for disinfecting drinking water or the like passes a diluted salt water (electrolyte) obtained by diluting saturated salt water to about 3% through an electrolysis part, and between a pair of adjacent electrodes of this electrolysis part As it passes through, the diluted brine is electrolyzed to produce sodium hypochlorite.
[0003]
A conventional sodium hypochlorite generator uses a single-plate electrode composed of a single plate material, with one side in the plate thickness direction serving as the anode surface and the other side serving as the cathode surface. In order to prevent the rise of the temperature of the diluted salt water due to Joule heat during electrolysis, the electrolysis part is arranged in parallel with a predetermined interval in the tank. The cooling means which consists of a coil shape and another cooling pipe is arrange | positioned (for example, refer patent document 1).
[0004]
[Patent Document 1]
JP-A-7-216572 (FIGS. 9 and 10)
[0005]
[Problems to be solved by the invention]
The conventional sodium hypochlorite generator uses a single-plate electrode such as a titanium plate coated with platinum oxide or the like on the cathode side, so that the mechanical strength of the electrode itself is not sufficient. An occlusion phenomenon occurs in which the cathode surface side occludes hydrogen ions generated during electrolysis, and an intermediate electrode or the like is bent and deformed by the occlusion phenomenon so that the cathode surface side extends and the anode surface side is recessed.
[0006]
Since a plurality of electrodes are arranged close to each other at an interval of about 3 mm in the electrolysis section, if the electrodes are deformed by the occlusion phenomenon, the distance between the electrodes changes, and current flows in the proximity of the pair of electrodes. A local concentration may occur, or a pair of electrodes may come into contact with each other and a short-circuit current may flow. Therefore, the deformation of the electrode causes a decrease in electrolytic efficiency and a partial consumption of the electrode, and further causes problems such as a hole in the short circuit portion of the electrode. In that case, the performance is extremely lowered, and the electrode can hardly be reused.
[0007]
In addition, since cooling means are arranged in the vicinity of both sides of the electrolysis unit or at an appropriate place in the electrolytic cell, there is a problem that this cooling means increases the size of the entire apparatus, increases the number of parts, and increases the manufacturing cost. .
[0008]
  In view of such conventional problems, the present invention can improve the physical strength of the electrode, prevent deformation of the electrode due to the occlusion phenomenon as much as possible, improve electrolysis efficiency, and extend the life of the electrode. In addition, the electrolyte solution can be easily cooled by the electrode itself, and the entire device can be downsized and the manufacturing cost can be reduced.RudenAn object is to provide a solution device.
[0009]
[Means for Solving the Problems]
  The present invention relates to an electrolysis apparatus in which three or more electrodes are arranged at a predetermined interval, and an electrolytic solution flowing from the bottom to the top between the pair of adjacent electrodes is electrolyzed. Among the electrodes, at least the intermediate electrode is electrically connected to two opposite electrode plates arranged substantially in parallel at a predetermined interval, and the two electrode plates on the peripheral side thereof. And a short-circuit prevention member for preventing a short circuit between the electrodes on both sides of the intermediate electrode is provided in contact with or close to the upper surface of the connection plate of the intermediate electrode.The internal space of the intermediate electrode is a cooling chamber through which cooling water passes.It is a thing.
  in frontInternal space of intermediate electrodeIs a flat boxIs desirable. A partition plate may be provided between the two electrode plates to maintain a distance between the electrode plates and partition the cooling chamber into cooling passages.
  In addition, the connection plates are integrally bent on two opposite sides of the two rectangular electrode plates, and each of the connection plates corresponds to a side of the counterpart electrode plate where the connection plate is not provided. As described above, the two electrode plates may be combined and their edges may be fixed by welding.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 8 illustrate a first embodiment in which the present invention is adopted in a sodium hypochlorite generator. As shown in FIG. 1 to FIG. 5, the sodium hypochlorite production apparatus includes an electrolytic cell 1 that forms an outer shell, an electrolytic unit 2 disposed in the electrolytic cell 1, and the electrolytic unit 2 in front of the electrolytic cell 1. A support frame 3 that is detachably supported in the front-rear direction, a rectifying unit 4 for dilute salt water (hereinafter referred to as an electrolytic solution) disposed below the electrolysis unit 2 in the electrolytic cell 1, and an electrolysis unit 2 and a gas-liquid separation unit 5 disposed in the upper part of the electrolytic cell 1. The electrolytic solution supplied to the rectification unit 4 through the supply pipe 6 passes between the electrodes 7 and 8 of the electrolysis unit 2. When flowing from the bottom to the top, the electrolytic solution is electrolyzed to produce sodium hypochlorite (hereinafter referred to as hyponitrous acid), and the electrolytic gas generated during the electrolysis is released from the degassing pipe 11 to the atmosphere. Then, the hypofilament is taken out from the take-out tube 10 to the outside. The electrolysis unit 2 and the support frame 3 constitute an electrolysis unit.
[0012]
The electrolytic cell 1 has a front wall portion 12, a rear wall portion 13, an upper wall portion 14, a lower wall portion 15, and a pair of left and right side wall portions 16 and is configured in a box shape that is long in the vertical direction and the front and rear direction. The part 15 is a mounting part 17 for installation. The electrolytic cell 1 is hermetically sealed with a synthetic resin plate or other insulating material. An opening 18 for inserting / removing the electrolysis unit 2 from the front side through the support frame 3 is provided on the front wall 12 side of the electrolytic cell 1, and a lid 19 that closes the opening 18 from the front side so as to be freely opened and closed. Is provided at the front portion of the support frame 3.
[0013]
In addition to the lid 19 that closes the opening 18, the support frame 3 protrudes rearward from the lid 19 and is disposed on the left and right sides of the electrolysis unit 2, and on the rear side of the electrolysis unit 2. A rear frame portion 21 for connecting the rear ends of the left and right side frame portions 20, and an electrolysis portion 2 composed of a plurality of electrodes 7, 8 therein and detachably disposed on both upper and lower sides of the electrolysis portion 2 A spider body 22, 23 for preventing a short circuit is provided.
[0014]
Each side frame portion 20 of the support frame 3 is supported slidably in the front-rear direction by an upper rail member 24 and a lower rail member 25 fixed to the inside of the electrolytic cell 1, for example, the inner surface of each side wall portion 16. The lid body 19 is detachably attached to the front wall portion 12 via a sealing material 27 such as packing or O-ring by a plurality of bolts 26 on the outer peripheral edge side. The rear frame portion 21 is detachably fixed to the left and right side frame portions 20 with bolts 28 or the like from the rear side. Note that the support frame 3 and the splint bodies 22 and 23 are made of an insulating material such as synthetic resin. Further, the lid body 19, the side frame portion 20, and the rear frame portion 21 of the support frame 3 may be integrated or separate.
[0015]
The rectifying unit 4 is formed between the left and right lower rail members 25 so that the upper side of the rectifying unit 4 extends left and right corresponding to the electrolysis unit 2. 6 is arranged. In the electrolyte supply pipe 6, a large number of appropriate intervals such as the upper side are provided at predetermined intervals so that the electrolyte can be distributed and supplied substantially uniformly between the electrodes 7 and 8 below the electrolysis unit 2. A supply port 6a is formed. The electrolytic solution supply pipe 6 is fixed to the front wall portion 12 and the rear wall portion 13 of the electrolytic cell 1, penetrates the rear wall portion 13 rearward, and the rear end thereof supplies the electrolytic solution through the supply pipe line 29. Connected to the source. The supply ports 6a are provided in two rows on the upper left and right sides of the electrolyte supply pipe 6 at a predetermined interval in the longitudinal direction.
[0016]
The gas-liquid separation part 5 is formed between the left and right upper rail members 24 so that the middle part in the vertical direction spreads left and right. Are provided on the left and right, and a gas vent pipe 11 communicating with the gas discharge section 30 above the take-out pipe 10 is provided. Two degassing pipes 11 are provided on the upper wall portion 14 of the electrolytic cell 1 in the front-rear direction.
[0017]
The take-out tube 10 is provided with a long hole-like take-out port 10a on the upper side along the longitudinal direction thereof, and is fixed to the front wall portion 12 and the rear wall portion 13 of the electrolytic cell 1, and the rear end side is connected to the rear wall portion 13. It penetrates backward. A gas-liquid separation part 31 is provided at the rear end of the take-out pipe 10, and a gas vent line 53 and a sub-liquid take-out line 54 are vertically connected to the gas-liquid separation part 31.
[0018]
Note that the number of the extraction pipe 10 and the gas vent pipe 11 may be one, or two or more. A drain pipe 32 communicating with the rectifying unit 4 is provided on the lower wall portion 15 of the electrolytic cell 1.
[0019]
The electrolysis unit 2 includes a plurality of rectangular electrodes 7, 8. The electrodes 7, 8 are arranged substantially parallel to each other at a predetermined interval in the left-right direction, and terminals 33 are provided on the electrodes 7, 8 at both ends. It has been. Each electrode 7, 8 is inserted into the support frame 3, in particular, the holding groove 34 in the vertical direction formed in the lid 19 and the rear frame portion 21 thereof, and both front and rear edges are held detachably on the support frame 3. The electrodes 7 and 8 can be attached and detached by removing the rear frame portion 21.
[0020]
The electrodes 7 and 8 are a plurality of three or more, a pair of end electrodes 7 arranged on the left and right sides, and one or two or more plural electrodes (in this embodiment, six in this embodiment). ) And the intermediate electrode 8 are provided in close proximity and in parallel.
[0021]
Each end electrode 7 has a plate-like single plate structure, and is arranged so as to be in contact with the inner surface of each side frame portion 20 of the support frame 3. It is fixed in the front-rear direction. The terminal 33 projects from the rear frame portion 21 of the support frame 3 through the through hole 35 formed in the rear wall portion 13 of the electrolytic cell 1 so as to be detachable and protrudes rearward. A power terminal 33a is detachably attached by a nut 37 to be screwed. The through hole 35 is sealed with a sealing material such as an O-ring. The rear side of the supporting frame 3 of the electrolysis unit is fixed to the electrolytic cell 1 by the screw part 36 and the nut 37 of the terminal 33.
[0022]
The intermediate electrode 8 has a flat box-like double plate structure including two electrode plates 38, and is disposed substantially in parallel with each other at a predetermined interval as shown in FIGS. The two electrode plates 38 and a connection plate 39 that integrally connects the outer circumferences of the two electrode plates 38 are formed in a hollow shape, and the inner space is a cooling chamber 40 through which cooling water passes. ing.
[0023]
Each electrode plate 38 has a rectangular shape and is arranged with a gap slightly larger than the interval between the electrodes 7 and 8, and the four sides of the outer periphery thereof are fixed to both ends of the belt-like connection plate 39 by welding or the like. Has been. The internal space formed by the electrode plate 38 and the connection plate 39 is a cooling chamber 40, and two mouth fittings 41 for cooling water protrude forward from the front and rear end portions of the front connection plate 39. It is fixed in the direction.
[0024]
The end electrode 7 and the intermediate electrode 8 are made of a conductive metal plate such as a titanium plate. Each end electrode 7 has a substantially entire inner surface facing the intermediate electrode 8, and each electrode plate 38 of the intermediate electrode 8 has substantially the entire outer surface facing the adjacent end electrode 7 or intermediate electrode 8. Each is coated with a conductive film such as platinum oxide. The external DC power supply connected to the terminal 33 is configured to switch the energization direction of the anode and the cathode at a predetermined time interval with respect to the pair of end electrodes 7. In the case of a direct current power supply unit in which the energization direction is one direction, a coating for a predetermined purpose may be applied to the cathode surface side of each of the electrodes 7 and 8 as necessary.
[0025]
The fitting 41 passes through a through hole 19a formed in the lid body 19 of the support frame 3 so as to be detachable and protrudes to the front side, and by a nut 43 that is screwed into the threaded portion in the concave portion 42 on the front side of the lid body 19. It is fixed to the lid 19. The cooling chamber 40 of each intermediate electrode 8 is connected in series on the front side of the lid 19 via a connecting pipe 44 such as a hose that can be attached to and detached from the upper and lower two fittings 41, and the remaining intermediate electrodes 8 at both ends. A cooling inflow pipe 45 and an outflow pipe 46 are detachably connected to the fitting 41.
[0026]
The intermediate electrode 8 has two types of attachment positions of the fitting 41, such as those having the fitting 41 on the outer side of the upper and lower ends and those having the fitting 41 on the inner side. And different types of intermediate electrodes 8 are alternately arranged so as to be adjacent to each other. This is to secure the gap between the through hole 19 a and the recess 42 formed in the lid 19 by vertically separating the fittings 41 between the adjacent intermediate electrodes 8.
[0027]
When the intermediate electrode 8 is large, as shown in FIG. 8, one or a plurality of (for example, three) partition plates 47 are provided between the electrode plates 38, and the partition plates 47 are spot welded to the electrode plates 38. It may be fixed by, for example. The partition plate 47 keeps the space between the electrode plates 38 and partitions the inside of the cooling chamber 40 into cooling passages 48 extending over the entire electrode plate 38 so that the cooling water flows through the entire intermediate electrode 8 completely. belongs to.
[0028]
The spider bodies 22 and 23 are made of an insulating material such as a synthetic resin, and are arranged substantially in parallel with each of the intermediate electrodes 8, and each of the short-circuit prevention members 49 and 50 that prevents a short circuit of the electrolytic current, and each short-circuit prevention The members 49 and 50 are integrally formed by strip-like connecting frames 51 and 52 that connect both end sides in the longitudinal direction, and are detachably fitted into the support frame 3 by press fitting or the like on both upper and lower sides of the electrolysis unit 2. The short-circuit prevention members 49 and 50 and the connecting frames 51 and 52 are in the form of strips that do not impede the flow of the electrolyte, hypochlorous acid, etc., and the respective short-circuit prevention members 49 and 50 are the upper and lower connection plates 39 of the intermediate electrode 8. It is provided in contact with or close to.
[0029]
In the case where the front and rear ends of the electrodes 7 and 8 are inserted into the holding frame 34 in the vertical direction formed in the support frame 3, in particular, the lid body 19 and the rear frame portion 21 thereof, Since the support frame 3 itself functions as a short-circuit prevention member at both end edges, it is sufficient to provide it on both the upper and lower sides. In addition, the spider bodies 22 and 23 may be provided only on the downstream side of at least the electrodes 7 and 8 (that is, on the upper side of the electrolysis unit 2) of the both sides in the flow direction of the electrolyte flowing between the pair of electrodes 7 and 8. . The members having a short-circuit preventing function for preventing a short circuit of the electrolytic current, such as the short-circuit preventing members 49 and 50, are desirably provided on the entire circumference in the circumferential direction on the edge sides of the electrodes 7 and 8.
[0030]
In the generation of hypochlorous acid, a DC current is supplied from the DC power supply unit to the electrodes 7 and 8 of the electrolysis unit 2 via the terminal 33 while supplying the electrolyte solution from the water supply pipe to the rectification unit 4 below the electrolysis unit 2. Shed. Then, the electrolytic solution supplied to the rectifying unit 4 is dispersed almost evenly by the rectifying action of the rectifying unit 4 and enters between the electrodes 7 and 8, and flows between the electrodes 7 and 8 from below to above. Is electrolyzed by a direct current, thereby producing hypochlorous liquid.
[0031]
By this electrolysis, a large amount of electrolytic gas mainly composed of hydrogen gas is generated at the same time as the generation of hypochlorous liquid. Then, the hypochlorous acid containing the fine cell-like electrolytic gas rises between the electrodes 7 and 8 and moves to the gas-liquid separation part 5 on the upper side of the electrolysis part 2. The gas and liquid are separated into a liquid and an electrolytic gas, the hypochlorous acid is taken out from the take-out pipe 10 to the outside of the electrolytic cell 1, and the electrolytic gas is discharged from the degassing pipe 11 to the outside atmosphere through the gas discharge part 30. Is done.
[0032]
Since the take-out pipe 10 has a take-out port 10a on the upper side, even when the hypochlorous acid contains a large amount of fine cell-like electrolytic gas, the electrolytic gas enters the take-out port 10a through the upper side of the take-out pipe 10. Since most of the electrolytic gas is previously separated from the sub-liquid, most of the electrolytic gas can be separated from the sub-liquid by the gas-liquid separation unit 5, and the amount of gas in the sub-liquid taken out from the take-out pipe 10 is minimized. it can. Even if some electrolytic gas enters the take-out pipe 10, the hypochlorous acid and the electrolytic gas are separated by the gas-liquid separation unit 31 outside the electrolytic cell 1, and the electrolytic gas is released from the gas vent line 53 to the atmosphere. Since it is discharged, it is possible to take out the hypo-sub solution with less electrolytic gas to the take-out pipeline 54 side.
[0033]
The direct current flows from one end electrode 7 through the intermediate electrode 8 to the other end electrode 7 using one end electrode 7 as an anode and the other end electrode 7 as a cathode. Switch the cathode to flow in the opposite direction. For this reason, oxides easily adhere to the cathode surface side of the electrodes 7 and 8, but by alternately switching the energizing direction, the amount of oxides deposited on the electrodes 7 and 8 can be reduced, When it becomes an anode, it can be removed by separation or the like.
[0034]
Occlusion of hydrogen ions occurs during electrolysis. For example, as shown in FIG. 9, when the end electrode 7a is an anode and the end electrode 7b is a cathode, a current flows from the end electrode 7a to one electrode plate 381a of the intermediate electrode 8a, and the other electrode A current flows from the plate 381b to one electrode plate 382a of the adjacent intermediate electrode 8b.
[0035]
At this time, hydrogen ions are generated between the electrodes 7 and 8, and the hydrogen ions are occluded on the cathode surface side of the electrode plates 381a, 382a and 383a which are the cathodes of the intermediate electrodes 8a, 8b and 8c. To do.
[0036]
However, when one intermediate electrode 8a, 8b is viewed, the cathode surface side of one of the two electrode plates 381a, 381b, 382a, 382b, which is the cathode, of the two electrode plates 381a, 382a occludes hydrogen ions. However, since the one electrode plate 381a, 382a and the anode surface side of the other electrode plate 381b, 382b are constituted by different electrode plates, the cathode surface and the anode surface are both sides of one electrode plate. In comparison with the conventional single plate electrode shown in FIG. 1, deformations such as bending of the electrode plates 381a, 381b, 382a, 382b of the intermediate electrodes 8a, 8b can be minimized.
[0037]
Accordingly, the intermediate electrode 8 has a flat box shape having two electrode plates 38, and the mechanical strength thereof is coupled with the bending of each electrode plate 38 of the intermediate electrode 8 and other deformations. It is possible to prevent as much as possible, and to keep the interval between the electrodes 7 and 8 substantially constant, local current concentration between the adjacent electrodes 7 and 8, reduction in electrolytic efficiency due to short circuit, etc. 7 and 8 are not partially consumed and the life of the electrodes 7 and 8 can be extended.
[0038]
During electrolysis of the electrolytic solution, cooling water is allowed to flow into the cooling chamber 40 inside each intermediate electrode 8 to cool the intermediate electrode 8 from the inner side. For this reason, the simple structure of the intermediate electrode 8 itself can prevent the temperature increase of the electrodes 7, 8 and the electrolytic solution due to Joule heat, and the electrolysis efficiency is improved. Further, since the intermediate electrode 8 has a flat box shape with two electrode plates 38 and the internal space is a cooling chamber 40, compared to the conventional case in which cooling means is separately provided in the vicinity of the electrolysis unit 2. Thus, the entire apparatus can be reduced in size and the manufacturing cost can be reduced. Moreover, since each of the intermediate electrodes 8 has a cooling chamber 40 and each of the intermediate electrodes 8 has a cooling function, the entire electrolysis unit 2 can be efficiently cooled almost uniformly and without any bias. .
[0039]
Since the short-circuit prevention members 49 and 50 are provided corresponding to the intermediate electrodes 8 on the upstream side and the downstream side of the electrolysis unit 2, the flat outer periphery of the two electrode plates 38 is integrally connected by the connection plate 39. In spite of the use of the intermediate electrode 8 having a box-like double plate structure, one or more intermediate electrodes 8 are sandwiched between the intermediate electrodes 8 on both sides of the upstream and downstream sides of the intermediate electrode 8. Can prevent a short-circuit current flowing through the electrode, improving electrolysis efficiency.
[0040]
That is, when the intermediate electrode 8 having a double plate structure is used, the dimension in the plate thickness direction of the intermediate electrode 8 becomes thick, so both sides (upstream side and downstream side) of the electrolyte flow direction with respect to the intermediate electrode 8, As a result, in comparison with the electrode 7 having a single plate structure, an insulating oxide or the like is likely to adhere to the connection plates 39 on the upstream side and the downstream side of the intermediate electrode 8. The electrical resistance between the electrodes 7 and 8 varies depending on the amount of insulating oxide or the like deposited on the electrode surface or the amount of electrolytic gas generated between the electrodes 7 and 8.
[0041]
Therefore, for example, as shown in FIG. 10, an insulating oxide 55 or the like adheres to a certain intermediate electrode 8b, and the electric current between the electrode surfaces of the intermediate electrode 8b and the adjacent intermediate electrode 8a due to some reason. When the resistance temporarily increases, if there is no short-circuit prevention member 49, 50, the electrolyte or hypo-sub solution between the upstream or downstream sides of the intermediate electrodes 8a, 8c on both sides of the intermediate electrode 8b. The short circuit current I may flow through In this case, the electrolysis efficiency of the electrolysis unit 2 may be extremely reduced.
[0042]
However, if the short-circuit prevention members 49 and 50 made of an insulating material are provided on the upstream side and the downstream side of each intermediate electrode 8, the insulating oxide 55 or the like is attached to the upstream side or the downstream side of the intermediate electrode 8b. In this case, even if the electrical resistance between the electrode plates 381b and 382a of the intermediate electrodes 8a and 8b temporarily increases, the short-circuit current I avoids the short-circuit prevention member 49b and the short-circuit prevention member 49b and the intermediate electrode 8b. Or the opposite side of the intermediate electrode 8b with respect to the short-circuit prevention member 49b.
[0043]
In the former case, the short-circuit prevention member 49b is in contact with or close to the intermediate electrode 8b, and the short-circuit current I tends to flow through the vicinity of the intermediate electrode 8b. It flows to the electrode 8b. In the latter case, there is a short-circuit prevention member 49b, and the electric resistance between the intermediate electrodes 8a and 8b increases more than the electric resistance between the intermediate electrodes 8a and 8c. Flows to the intermediate electrode 8b having a small diameter.
[0044]
Therefore, by providing the short-circuit prevention member 49 in contact with or close to each intermediate electrode 8, the short-circuit current I flows between the electrodes 7 and 8 on both sides of the intermediate electrode 8. Absent. Since both the front and rear sides of each intermediate electrode 8 are fitted in the holding groove 34, there is no problem of a short circuit current on the holding groove 34 side.
[0045]
When the electrolytic unit 2 is maintained, inspected, etc., the nut 37 and the power terminal 33a of the terminal 33 are removed, the connecting pipe 44 and the nut 43 of the fitting 41 are removed, and then the lid 19 is unlocked. The support frame 3 provided with the portion 2 can be easily extracted from the electrolytic cell 1 to the front side along the upper and lower rail members 24 and 25. In addition, when incorporating, the support frame 3 is inserted into the electrolytic cell 1 along the rail members 24, 25, and then the lid 19 is fixed to the electrolytic cell 1, and the power terminal 33 a is fixed to the terminal 33 with the nut 37. The connection pipe 44 may be connected by tightening the fitting 41 with the nut 43.
[0046]
FIG. 11 illustrates a second embodiment in which the present invention is employed in a sodium hypochlorite generator. The intermediate electrode 8 with each electrode plate 38 having a rectangular shape may be configured as shown in FIG. The intermediate electrode 8 is provided by integrally bending connection plates 39 on two opposite sides of each electrode plate 38, and each of the connection plates 39 corresponds to a side of the counterpart electrode plate 38 that does not have the connection plate 39. Thus, the two electrode plates 38 are combined, and the edges are fixed by welding or the like. Other configurations are the same as those of the first embodiment.
[0047]
12 and 13 illustrate a third embodiment in which the present invention is employed in a sodium hypochlorite generator. The plurality of electrodes 8A of the electrolysis unit 2 are formed in a flat cylindrical shape by integrally connecting two sides of the two electrode plates 38 with a connection plate 39. The support frame 3 with the lid body 19 is provided with a plurality of support members 57 protruding rearward from the lid body 19 in a comb-tooth shape, and a flat cylindrical electrode 8A is detachably attached to each support member 57. It is fitted in. The support member 57 has a plate shape or a frame shape. The support frame 3 includes a pair of left and right side frame portions 20 and a rear frame portion 21 that connects the rear ends thereof. Further, the terminals 33 are fixed to the outer electrode plates 38 by welding or the like in the electrodes 8A at both ends. Other configurations are substantially the same as those of the first embodiment.
[0048]
As illustrated in this embodiment, the electrolytic section 2 is constituted by a plurality (particularly, three or more) of flat cylindrical electrodes 8A, and each electrode 8A is fitted to each support member 57 of the support frame 3. good. The electrode 8A may be fitted over the support member 57 in the vertical direction from above or below.
[0049]
14 and 15 illustrate a fourth embodiment in which the present invention is employed in a sodium hypochlorite generator. In the case of a sodium hypochlorite generating apparatus that is used by being put into the storage tank 58 for storing the water to be disinfected, the electrodes 7 and 8 of the electrolysis unit 2 are mounted on the support frame 3 as shown in FIGS. It is also possible to use it in such a state.
[0050]
In the case of standing on the bottom wall of the storage tank 58, a leg 59 may be provided at the lower part of the support frame 3 as shown in FIGS. It is desirable to provide a hanger. Each terminal 33 is preferably waterproof and insulated. The structures of the electrolysis unit 2, the support frame 3, the spider body 22, 23 and the like are substantially the same as those in the first embodiment.
[0051]
As mentioned above, although each embodiment of this invention was explained in full detail, this invention is not limited to each embodiment. For example, when the electrolysis unit 2 is provided in the electrolytic cell 1, the electrolytic cell 1 may be a hermetically sealed type or an open-air type. The electrolysis unit 2 can be inserted into the electrolytic cell 1 from the front side through the support frame 3 so as to be detachable from the front side. It may be inserted into. The electrodes 7 and 8 of the electrolysis unit 2 may be individually inserted into the holding groove 34 of the electrolytic cell 1 from above. In this case, it is not necessary to provide the support frame 3 separately from the electrolytic cell 1.
[0052]
The electrodes 8 and 8A having a double plate structure are formed by integrally connecting the outer peripheral edges of the two electrode plates 38 with a connection plate 39, and when the two electrode plates 38 have a donut shape or the like, Alternatively, the outer peripheral edge may be connected by the connection plate 39. Accordingly, it is sufficient for the electrodes 7 and 8 having a double plate structure to have a structure in which two electrode plates 38 arranged in parallel to each other and connected in parallel are integrally connected by a connection plate 39. A box shape in which the connection plate 39 is provided on the entire periphery of the edge, a bag shape in which an opening is provided in the connection plate 39 in a part in the circumferential direction, or other shapes may be used.
[0053]
The two electrode plates 38 may be made of the same material or different materials. The connection plate 39 may be made of the same material as both or one of the two electrode plates 38 or may be made of a material different from that of the electrode plate 38. The flow direction of the electrolytic solution may be up and down, left and right, and front and rear. Even in this case, the short-circuit prevention members 49 and 50 may be at least downstream of the electrodes 8 and 8A. The electrolyzer may be other than a sodium hypochlorite generator.
[0054]
【The invention's effect】
  The present inventionThen, of the electrodeThe mechanical strength is improved, and the electricity caused by the occlusion phenomenon during electrolysisExtremeCan prevent deformation, long-term guarantee of initial performance, improved electrolytic efficiency,ExtremeLong life can be achieved.Moreover, a short circuit between the electrodes on both sides of the intermediate electrode can be prevented, and the electrolysis efficiency is improved.
[0055]
  MoreElectricExtreme selfElectrolyte etc. can be easily cooled by the body and has a cooling function.The poleCan be manufactured at low cost.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of a sodium hypochlorite generator that illustrates a first embodiment of the present invention, with connection pipes and the like removed.
FIG. 2 is a front sectional view of a sodium hypochlorite generator exemplifying the first embodiment of the present description.
FIG. 3 is a side sectional view of a sodium hypochlorite generator exemplifying the first embodiment of the present description.
FIG. 4 is a plan sectional view of a sodium hypochlorite generator exemplifying the first embodiment of the present description.
FIG. 5 is an exploded perspective view of a sodium hypochlorite generator exemplifying the first embodiment of the present description.
FIG. 6 is a partially cutaway side view of the intermediate electrode illustrating the first embodiment of the present description.
FIG. 7 is a partially broken plan view of an intermediate electrode illustrating the first embodiment of the present description.
FIG. 8 is a cross-sectional view of an intermediate electrode illustrating the first embodiment of the present description.
FIG. 9 is an operation explanatory diagram illustrating the first embodiment of the present description.
FIG. 10 is an operation explanatory diagram illustrating the first embodiment of the present description.
FIG. 11 is an exploded perspective view of an intermediate electrode illustrating the second embodiment of the present description.
FIG. 12 is a perspective view of a relevant part of a sodium hypochlorite generator exemplifying the third embodiment of the present description.
FIG. 13 is a perspective view of a relevant part of a sodium hypochlorite generator exemplifying the third embodiment of the present description.
FIG. 14 is a perspective view of a sodium hypochlorite generator exemplifying the fourth embodiment of the present description.
FIG. 15 is a cross-sectional view of a sodium hypochlorite generator exemplifying the fourth embodiment of the present description.
[Explanation of symbols]
7,8,8A electrode
38 Electrode plate
39 Connection board
40 Cooling room
49, 50 Short-circuit prevention member

Claims (4)

In the electrolysis apparatus in which three or more electrodes are arranged at a predetermined interval, and an electrolytic solution flowing between the electrodes from the bottom to the top is electrolyzed between a pair of adjacent electrodes, the electrodes Among these, at least the intermediate electrode is composed of two opposing electrode plates arranged substantially in parallel at a predetermined interval, and a connecting plate for electrically connecting the two electrode plates on the peripheral side thereof A short-circuit prevention member for preventing a short circuit between the electrodes on both sides of the intermediate electrode is provided in contact with or close to the upper surface of the connection plate of the intermediate electrode, and the intermediate electrode An electrolysis apparatus characterized in that the internal space of the is a cooling chamber through which cooling water passes . Electrolysis apparatus according to claim 1 the inner space of the previous SL intermediate electrode, which is a flat box. Wherein the two electrode plates, the electrolytic device according to claim 1 or 2, characterized in that a partition plate a holding and the cooling chamber a distance of the electrode plates to define a cooling passage.   The connection plate is integrally bent on two opposite sides of the two rectangular electrode plates, and each of the connection plates corresponds to a side of the counterpart electrode plate where the connection plate is not provided. The electrolysis apparatus according to any one of claims 1 to 3, wherein the two electrode plates are combined and their edges are fixed by welding.

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