JPH09174057A - Salt water electrolyzing apparatus for forming hypochlorite solution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact salt water electrolyzing apparatus for forming a hypochlorite soln. capable of preventing the disturbance of dilute salt water and electrolytic gas, capable of smoothly separating the electrolytic gas from the hypochlorite soln. and capable of being stably operated with high efficiency over a long period of time. SOLUTION: Electrode units 17 each consisting of a plurality of electrode plates are provided in an electrolytic cell 1 and dilute salt water is electrolyzed between the electrode plates to form a hypochlorite soln. Descending flow passages 7-11 allowing dilute salt water to flow downwardly and ascending flow passages 12-15 allowing dilute salt water upwardly are alternately arranged in the electrolytic cell 1 in a zigzag state from the upstream side of the electrolytic cell to the downstream side thereof and the electrode units 17 are arranged in the ascending flow passages 12-15 so that the electrode plates become a vertical direction along the flow direction of dilute salt water and a gas zone 36 is provided to the upper part in the electrolytic cell 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a salt water electrolysis apparatus for producing a hyposub-liquid which electrolyzes diluted salt water to produce hypo-sub-liquid containing sodium hypochlorite.

[0002]

2. Description of the Related Art A salt water electrolysis apparatus for producing hypochlorous liquid used for sterilizing and disinfecting waterworks is conventionally provided with a plurality of electrode plates in an electrolytic cell, as described in Japanese Patent Publication No. 57-8192. There is an electrode unit which is configured to electrolyze the diluted salt water between the electrode plates of the electrode unit to generate hypochlorite.

This conventional salt water electrolysis device is equipped with
A plurality of electrode plates protruding from both the left and right sides are alternately arranged from the upper side to the lower side, and these electrode plates form a lateral flow path that bends in a zigzag shape horizontally in the electrolytic cell. Diluted salt water flowing in the passage is electrolyzed between the electrode plates to generate hypochlorous liquid.

[0004]

In this conventional salt water electrolysis apparatus, a plurality of electrode plates are alternately combined to form a lateral flow passage, so that the diluted salt water flow becomes a meandering shape, which is relatively difficult. While having the advantage of being able to configure a highly efficient and compact electrolytic cell, turbulence of diluted salt water and electrolytic gas between electrode plates is likely to occur, and local scaling occurs on the electrode plates,
There is a drawback that it is difficult to drive stably for a long period of time.

That is, since the lateral flow path system is conventionally adopted, the flow direction of the electrolytic gas generated when the diluted salt water is electrolyzed between the electrode plates and the flow direction of the diluted salt water intersect at a right angle. As a result, the disturbance of the diluted salt water and the electrolytic gas between the electrode plates is likely to occur, the electrolysis efficiency between the electrode plates decreases, and local scaling occurs at the cathodes of the electrode plates to grow. Therefore, there is a drawback that it is difficult to operate stably in a high efficiency state for a long period of time.

Further, in the lateral flow path system, when hydrogen gas (a main component of electrolytic gas) is entrained in hypochlorite flowing out of the electrolytic cell, static electricity may cause a fire and explosion at the outlet side of the electrolytic cell, the storage tank, and the like. The danger is sufficiently expected, and even if the equipment for preventing this is installed, if the equipment is out of order and troubles occur, there is a risk of causing serious injury. In view of such conventional problems, the present invention can prevent the disturbance of the diluted salt water and the electrolytic gas, can smoothly separate the electrolytic gas from the hypochlorous solution, and is compact and operates stably with high efficiency for a long period of time. It is an object of the present invention to provide a salt water electrolysis apparatus capable of producing a hypothalamic solution.

[0007]

According to the present invention as set forth in claim 1, an electrode unit 17 composed of a plurality of electrode plates 37 is provided in an electrolytic cell 1, and diluted salt water is provided between the electrode plates 37 of the electrode unit 17. In a salt water electrolysis apparatus for hypochlorite production by electrolyzing hypothionite, in electrolytic cell 1, downward flow passages 7 to 11 in which diluted salt water flows downward and upward flow passages flowing upward 12 ~
15 and 15 are alternately arranged in a zigzag shape from the upper side to the lower side, and the electrode unit 37 is arranged in the upward flow paths 12 to 15 so that the electrode plate 37 is in the vertical direction along the flow direction of the diluted salt water. 17 is arranged, and a gas zone 36 is provided in the upper part of the electrolytic cell 1.

According to a second aspect of the present invention, in the first aspect of the invention, the flow passage areas of the downward flow passages 8 to 10 are made larger than the flow passage areas of the upward flow passages 12 to 15, This downward flow path 8-10
Further, a cooling means 16 for cooling the diluted salt water is arranged.

According to a third aspect of the present invention, in the invention according to the first or second aspect, a dipping plate 34 that guides the diluted salt water downwardly and an diluted salt water upwardly are guided in the electrolytic cell 1. Overflow plate that allows diluted salt water to overflow downstream from its upper end
35 are arranged alternately, and the diversion plates 34 and the overflow plates 35 form downward flow paths 7 to 11 and upward flow paths 12 to 15 in the electrolytic cell 1.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 7 illustrate a first embodiment of the present invention. In FIG. 1, reference numeral 1 is an electrolytic cell for electrolyzing dilute salt water to produce hypochlorous liquid containing 1% sodium hypochlorite. Reference numeral 2 denotes a gas discharge tube, which is fixed to the upper side of the electrolytic cell 1 so that electrolytic gas such as hydrogen gas generated during electrolysis of diluted salt water can be extracted from the electrolytic cell 1.
Reference numeral 3 is a gas-liquid separator for separating the sub-liquid and the electrolytic gas and discharging the electrolytic gas to the atmosphere. A mist separator 4 is designed to condense the water contained in the gas released from the gas-liquid separator 3 into the atmosphere and remove the water.

The electrolytic cell 1 is, as shown in FIGS.
The tank main body 5 having an open upper side and the lid 6 detachably attached to the opening side of the tank main body 5 are provided, and the downward flow paths 7 to 11 and the upward flow paths 12 to 15 are provided in the tank main body 5. And the cooling means 16 are arranged in the downward flow paths 8 to 10, and the electrode unit 17 is arranged in the upward flow paths 12 to 15, respectively. The lid 6 is the inner lid
It is composed of 18 and an outer lid 19.

The tank body 5 includes a bottom wall 21 and a pair of side walls 22 on both sides in the width direction of the bottom wall 21 in an outer shell body 20 made of stainless steel or the like.
And a pair of upper and lower end walls 23 and 24 on the side wall 22, and a diluted salt water inlet port 25 on the upper end wall 23 and a lower end wall 24. In addition, the pair of outlets 26 for the hypochlorous liquid containing sodium hypochlorite are fixed.

The inner lid 18 is fitted in the outer shell 20 of the tank body 5 so as to close the upper end opening side of the tank body 5, and the side wall 22 and the end wall 2
It is removably mounted on the upper ends of 3,24 via a sealing material 27 such as an O-ring, and is fixed by being pressed against the tank body 5 side by an outer lid 19.

The outer lid 19 is formed with notches 28 at regular intervals on the peripheral edge side, and is fixed to the tank body 5 by tightening means 29 which engages with the notches 28 in a detachable manner. . Each tightening means 29 has a bracket with the bottom of the tank body 5
It comprises a tightening bolt 32 pivotally supported by a pivot shaft 31 via a shaft 31 and detachable from a notch portion 28, a nut 33 screwed to the tightening bolt 32 and tightening the outer lid 19 downward. In addition, the bottom wall 21, the side wall 22, the end walls 23 and 24, and the inner lid
Reference numeral 18 is made of an insulating synthetic resin plate or the like. The outer lid 19 may be made of synthetic resin or stainless steel.

As shown in FIGS. 2 to 5, in the electrolytic cell 1, a dipping plate 34 for guiding the diluted salt water downward, a dilute salt water for the upward guide, and the diluted salt water overflowing from the upper end to the downstream side. The overflow plates 35 to be made to flow are alternately arranged from the upper side to the lower side at a predetermined interval, four by four, and the submerged plate 34 and the overflow plate 35 cause the salt water or the sub-liquid to flow downward. The downward flow passages 7 to 11 and the upward flow passages 12 to 15 in which the salt water or the hypochlorite flows upward are configured in a zigzag shape so as to be alternately bent up and down, and the gas zone 36 is provided on the upper side thereof. It is provided.

There are five downward flow paths 7 to 11 in the tank main body 5,
The flow path area of the two downward flow paths 7 to 11 at both ends is the upward flow path.
While the width is approximately the same as that of 12 to 15, the middle three downward flow passages 7 to 11 have a larger flow passage area than the upward flow passages 12 to 15. A cooling means 16 is arranged in each of the three downward flow paths 7 to 11. There are four upward flow paths 12 to 15 in the tank body 5, and each upward flow path 12 to 15 is provided with an electrode unit 17 composed of a plurality of electrode plates 37.

The submerged plate 34, the overflow plate 35, and the electrode plate 37 are provided between the holding plate 38 and the holding plate 38 arranged along the flow direction on the inner surface of the side wall 22 on both sides in the width direction of the electrolytic cell 1. Are supported in parallel with each other by a holding plate 38 and a rectifying plate 39 arranged substantially in parallel with each other in the center of the lower part of the electrolytic cell 1. That is, the holding plate 38 has substantially the same height as each side wall 22 of the tank main body 5, and the straightening plate 39 has a low strip shape.
Slits 40, 41 are formed in the slits 40, 41 corresponding to the respective diving plates 34, overflow plates 35, and electrode plates 37.
4, overflow plate 35 and electrode plate 37 are inserted.

The rectifying plate 39 rectifies the diluted salt water flowing from the lower ends of the downward flow passages 7 to 11 to the upward flow passages 12 to 15, and each diving plate 34, overflow plate 35 and electrode plate 37. A mountain-shaped portion 39a is formed in the longitudinal direction on the upper end side so as to have a supporting action for supporting the above, and so as to obtain a sufficient rectifying action for the diluted salt water.

Both the diving plate 34 and the overflow plate 35 are made of an insulating material such as a synthetic resin plate. Below the dive plate 34, a predetermined gap is provided between the bottom wall 21 so that the downward flow passages 7 to 11 on both sides thereof and the upward flow passages 12 to 15 communicate with each other. On the upper side of 34, a predetermined gap is provided between the inner cover 18 and the gas passage 41 that connects the upper side and the lower side of the diving plate 34. Each overflow plate 35 is provided such that the lower end thereof is in contact with the bottom wall 21 so that the overflow plate 35 on the lower side has a lower height.

Each cooling means 16 is for cooling the diluted salt water flowing in the downward flow paths 7 to 11, and is provided with a spirally wound cooling pipe or a cooling pipe having a large number of fins. And is supported by the lid 6 via the cooling water supply pipe 42 and the cooling water discharge pipe 43 at both ends. Each of the cooling water supply pipe 42 and the cooling water discharge pipe 43 vertically penetrates the inner lid 18 and the outer lid of the lid body 6 and is provided with the upper and lower stopper rings 44 and nuts 45.
It is detachably fixed to 6. And cooling water supply pipe
42 is connected to the cooling water supply joint 46, and the cooling water discharge pipe 43 is connected to the cooling water discharge joint 47, respectively.
Cooling water is supplied to 16, and the cooling water is discharged from the cooling water discharge pipe 43.

Each electrode unit 17 is of a bipolar type and has a plurality of electrodes arranged in parallel at equal intervals, for example, four electrodes.
A sheet of electrode plates 37 is provided, and a power supply rod 48 is connected to the electrode plates 37 at the upper and lower ends thereof. Each power supply rod 48 has a lid 6
The inner lid 18 and the outer lid 19 are vertically penetrated and are detachably fixed to the lid body 6 by upper and lower stopper rings 49 and nuts 50, and the upper end side thereof serves as a terminal 51.
Each terminal 51 is connected by a cable 52 so that the electrode units 17 are in series as shown in FIGS. 6 and 7.

The gas discharge tube 2 is erected on the lid body 6 so that its lower end communicates with the gas zone 36 in the electrolytic cell 1.
At the upper end of the gas discharge tube 2, a relief valve 53 that operates when the internal pressure in the electrolytic cell 1 rises above a certain level is attached.

The gas-liquid separator 3 comprises a cylindrical separator body 54.
And a gas exhaust valve 55 attached to the upper end of the separator body 54.
And a float 56 that opens and closes the valve body 55a of the gas exhaust valve 55 up and down, and a gas discharge pipe 57 that discharges the gas from the separator body 54 to the atmosphere when the gas exhaust valve 55 is opened. The lower end portion of the separator body 54 is connected to the outlet 26 via the pipe joint 58.
The upper side is connected to the gas exhaust tube 2 via the pipe 59. Reference numeral 64 is a spacer for the electrode plate 37.

In the salt water electrolysis apparatus having the above structure, an electrolytic cell
When assembling 1, cooling water supply pipe 4 of cooling means 16
2, the cooling means 16 is attached to the lid body 6 via the cooling water discharge pipe 43, and the slits 40, 4 of the holding plate 38 and the flow straightening plate 39 are attached.
The dipping plate 34, the overflow plate 35, and the electrode plate 37 are inserted into 1 and the electrode unit 17 is attached to the lid 6 via the power supply rod 48 and the like. With this, the electrode unit 17, the cooling means 16 and the like can be mounted on the lid 6 side as a unit, and then the holding plate 38 and the rectifying plate 39 are inserted into the tank body 5 and the opening side of the tank body 5 is sealed. The lid 6 may be placed via the material 27. Therefore, the electrode unit 1
7. The cooling means 16 and the like are easy to handle, and workability during assembly is significantly improved.

After inserting the electrode unit 17, the cooling means 16 and the like into the tank main body 5 and placing the lid 6 on the tank main body 5,
The fastening means 29 is used to fasten and fix the lid body 6 to the tank body 5. When fixing the cooling water supply pipe 42 and the cooling water discharge pipe 43 of the cooling means 16 and the power supply rod 48 of the electrode unit 17 to the lid body 6, these are inserted into the holes of the lid body 6, and the stopper ring 44, 49 is brought into contact with the lid body 6 from the lower side through the O-ring, and the nuts 45 and 50 are tightened and fixed from the upper side. As a result, it is possible to reliably prevent the electrolytic gas from leaking from the electrolytic cell 1 despite the internal pressure type electrolytic cell 1.

In producing hypochlorous solution, first, a DC voltage is applied between the electrode plates 37 of each electrode unit 17 and cooling water is supplied to the cooling means 16, and in that state, the diluted salt water supply source is used. Diluted salt water having a concentration of about 3 to 4% is supplied to the electrolytic cell 1, and this diluted salt water is electrolyzed by each electrode unit 17 in the electrolytic cell 1.

That is, when diluted salt water is supplied from the inflow port 25 of the electrolytic cell 1 into the tank body 5, the salt water in the tank body 5 is first guided downward by the first dive plate 34. ,
Flows downward in the first downward flow path 7. Then, the diluted salt water that has reached the lower end of the first downward flow path 7 is guided upward along the first overflow plate 35 and flows upward in the first upward flow path 12. go.

The diluted salt water that has risen in the first upward flow path 12 overflows from the upper end of the first overflow plate 35 to the second downward flow path 8 side, and this second Flow through the lower end of the downward flow path 8 into the second upward flow path 13, and this second overflow plate
Overflow from the upper end of 35 to the third downward flow path 9 side. Hereinafter, similarly, the third upward flow path 14, the fourth downward flow path 10, the fourth upward flow path 15, and the fifth downward flow path 11
After that, it flows toward the outlet 26 side. The level of the diluted salt water in the electrolytic cell 1 is highest on the first downward flow path 7 side, and gradually decreases toward the lower side.

The diluted salt water in the electrolytic cell 1 is supplied to each of the downward flow paths 7 to 7.
11 and the upward flow paths 12 to 15 are sequentially bent up and down in a zigzag manner and flow from the upper side to the lower side. Therefore, as compared with the case where the diluted salt water flows linearly from the inflow port 25 to the outflow port 26 of the electrolytic cell 1, the electrolytic cell 1 can be downsized and the flow path length can be increased. The diluted salt water in the electrolytic cell 1 is rectified by the rectifying plate 39 when flowing from the lower ends of the downward flow paths 7 to 11 to the upward flow paths 12 to 15.
The flow of the diluted salt water is not disturbed between the upward flow passages 12 and 15.

The diluted salt water that has entered the upward flow passages 12 to 15 is
Since the electrode unit 17 provided with a plurality of electrode plates 37 arranged in the up-down direction is in the upward flow paths 12 to 15, the diluted salt water is guided by each electrode plate 37 of the electrode unit 17,
The diluted salt water flows smoothly between the electrode plates 37 in an orderly and smooth manner.

Since a DC voltage is applied to each electrode unit 17 via the terminal 51 and a DC current flows between the electrode plates 37 via the diluted salt water, the diluted salt water is supplied to the upward flow paths 12 to 12. When ascending in 15, the diluted salt water is electrolyzed by the current flowing between the electrode plates 37 of the electrode unit 17.

During this electrolysis, a gas such as hydrogen gas is generated, but the electrolysis gas flows between the electrode plates 37 of the electrode unit 17 in the same direction as the ascending diluted salt water. Since the flow direction of the diluted salt water is the same as the forward direction, the electrolytic salt gas does not disturb the flow of the diluted salt water, and the diluted salt water flows in an orderly upward direction between the electrode plates 37. Therefore, in combination with the orderly and smooth flow of the diluted salt water described above, local scaling does not occur on the cathode side of the electrode plate 37, and stable operation is possible over a long period of time. You can

The electrolytic gas rapidly rises in each of the upward flow paths 12 to 15 in accordance with the flow of the diluted salt water. And each upward flow path
The diluted salt water rising in 12 to 15 overflows from the upper end of each overflow plate 35 to the lower side downward flow passages 7 to 11 side, and at the time of the overflow, the electrolytic gas in the diluted salt water is discharged. It is separated from the diluted salt water and accumulated in the gas zone 36 on the upper side in the electrolytic cell 1. Therefore, the electrolytic gas contained in the diluted salt water after electrolysis can be separated almost completely smoothly on the free water surface at the time of overflow,
The separated electrolytic gas can be stored in the gas zone 36.

On the other hand, since the temperature of the diluted salt water rises during electrolysis in each electrode unit 17, the diluted salt water is cooled by the cooling means 16 when flowing downward in each of the downward flow passages 7 to 11 to raise its temperature. Suppress. Since each of the downward flow passages 7 to 11 has a larger flow passage area than the other upward flow passages 12 to 15, etc. The flow velocity of the diluted salt water in the downward flow paths 7 to 11 can be reduced. Therefore, there is an advantage that the diluted salt water can be sufficiently cooled by the cooling means 16 and the diluted salt water can be efficiently cooled by the cooling means 16.

Each time when electrolysis is carried out in each electrode unit 17, the concentration of the hypoxite increases and reaches the fifth downward flow path 11, so that the hypoxite having a predetermined concentration is produced. Then, after taking out this hypochlorite from the outflow port 26 to the outside of the electrolytic cell 1, the gas-liquid separator 3 removes and separates the electrolytic gas in the hypochlorite, and Send sub-liquid to the latter stage.

In the gas-liquid separator 3, in addition to the function of separating the electrolytic gas in the hypochlorous liquid taken out from the outlet 26, the electrolytic cell 1
The electrolytic gas collected in the gas zone 36 above the
It has a function to remove the hyposub-liquid in the electrolysis gas by taking it out to outside. Then, when the gas pressure in the separator main body 54 rises, the float 56 descends to release the gas from the gas exhaust valve 55 to the atmosphere. If the gas contains a sub-liquid contained in the mist state, the mist is separated from the mist by a mist separator.
Agglomerate with 4 and separate.

The gas zone 36 is a gas discharge tube 2, a gas-liquid separation period
Since it is connected to the mist separator 4 via 3 and blocks the electrolytic gas from the outside air, it is possible to prevent ignition of the residual gas in the electrolytic cell 1 due to external factors such as lightning. Further, when the operation is stopped, the electrolytic bath 1 is filled with diluted salt water and the water level is raised to the gas zone 36, whereby the electrolytic gas remaining in the electrolytic bath 1 can be easily removed.

The electrolysis cell 1 is of a closed type, and the electrolysis gas accumulated in the upper gas zone 36 in the electrolysis cell 1 is exhausted to the atmosphere via the gas-liquid separator 3, so that the gas exhaust valve 55 By controlling the electrolytic gas pressure by control or the like, the level of the diluted salt water does not rise to the gas zone 36 of the electrolytic cell 1 even when the supply destination of the hypochlorous solution is high.
Therefore, it is possible to completely perform gas-liquid separation in the electrolytic cell 1. Further, the terminal 51 of each electrode unit 17, the cooling water supply pipe 42 and the cooling water discharge pipe 43 of the cooling means 16 and the like are covered by the lid body 6.
Since it is on the upper side of the electrolytic cell 1, the processing on the side of the cell body 5 is reduced, and the reliability of the electrolytic cell 1 is improved.

FIG. 8 illustrates a second embodiment of the present invention,
The number of electrode units 17 and the cooling means 16 in the electrolytic cell 1 are the same, and a baffle plate 61 is provided in the upper part of the electrolytic cell 1. That is, in the first embodiment, the electrode unit 17
The number of cooling means 16 is three and the number of cooling means 16 is three.
In this embodiment, the numbers of the electrode units 17 and the cooling means 16 are both three. Therefore, in the present invention, the numbers and the like of the electrode units 17 and the cooling means 16 are not particularly a problem, and may be appropriately determined according to the concentration, temperature and the like of the hypothalite.

A baffle plate with a hole 62 in the upper part of the tank body 5
There is a block 61, and the baffle plate 61 divides the inside of the electrolytic cell 1 into a gas zone 36 and the lower side of the gas zone 36 to separate them. In this case, the flow blocking plate 61 can block the flow of the diluted salt water toward the gas zone 36. In addition, when the baffle plate 61 is attached, if the upper end of each diving plate 34 is brought into contact with the baffle plate 61 and the divert plate 34 is used to support the baffle plate 61,
The baffle plate 61 can be easily provided in the electrolytic cell 1. Although the respective embodiments of the present invention have been described above, the present invention is not limited to the respective embodiments. For example, the electrode unit 17 may have a structure other than the bipolar structure.

[0041]

According to the present invention as set forth in claim 1, an electrode unit 17 comprising a plurality of electrode plates 37 is provided in the electrolytic cell 1, and diluted salt water is electrolyzed between the electrode plates 37 of the electrode unit 17. In the salt water electrolysis apparatus for hypothalamic liquid generation, the dilute salt water flows downward in the electrolytic cell 1 and the upward flow channel 12 to 11 flows downward. 15 and 15 are alternately arranged in a zigzag shape from the upper side to the lower side, and the electrode unit 37 is arranged in the upward flow paths 12 to 15 so that the electrode plate 37 is in the vertical direction along the flow direction of the diluted salt water. Since 17 are arranged and the gas zone 36 is provided in the upper part of the electrolytic cell 1, the following remarkable effects are obtained.

Since the downward flow paths 7 to 11 and the upward flow paths 12 to 15 are alternately arranged in a zigzag shape from the upper side to the lower side in the electrolytic cell 1, the electrolytic cell 1 is compact. The lengths of the flow paths 7 to 15 can be increased while achieving the realization. Since the electrode unit 37 is arranged in the upward flow paths 12 to 15 so that the electrode plate 37 is in the vertical direction along the flow direction of the diluted salt water, it is possible to prevent the diluted salt water and the electrolytic gas from being disturbed, and the cathode There is an advantage that stable operation can be performed in a high efficiency state for a long period of time, such as the occurrence of local scale on the side. Since the dilute salt water or the free water surface of the sub-liquid is formed in the electrolytic cell 1, the electrolytic gas in the diluted salt water or the hypo-sub-liquid diluted salt water can be smoothly separated in the electrolytic cell 1. Since the gas zone 36 is provided in the upper part of the electrolytic cell 1, the electrolytic gas separated from the diluted salt water or the hypothalite can be reliably captured in the gas zone 36.

According to the present invention described in claim 2, in the invention described in claim 1, the flow passage areas of the downward flow passages 8 to 10 are larger than the flow passage areas of the upward flow passages 12 to 15. And this downward flow path
Since the cooling means 16 for cooling the diluted salt water is arranged at 8 to 10, the following remarkable effects are obtained.

Since the cooling means 16 is arranged in the downward flow paths 8 to 10, the diluted salt water can be cooled by the cooling means 16, and the diluted salt water can be efficiently electrolyzed at the appropriate temperature. Since the flow passage area of the downward flow passages 8 to 10 is larger than the flow passage area of the upward flow passages 12 to 15, the flow velocity of the diluted salt water in the downward flow passages 8 to 10 can be slowed down, and the cooling means 16 allows diluted salt water to be cooled efficiently.

According to the present invention described in claim 3, in the invention described in claim 1 or 2, the dipping plate 34 for guiding the diluted salt water downward and the diluted salt water for the electrolytic cell 1 are guided upward. And the overflow plates 35 for overflowing the diluted salt water to the downstream side are alternately arranged from the upper end thereof, and the diving plate 34 and the overflow plate are arranged.
35 and the downward flow paths 7 to 11 and the upward flow path 12 to
Since 15 and 15 are formed, the following remarkable effects are achieved. The downward flow paths 7 to 11 and the upward flow paths 12 to 15 can be easily formed in the electrolytic cell 1.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a salt water electrolysis apparatus for producing hypochlorous liquid according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the electrolytic cell showing the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of an electrolytic cell showing the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a side view of the electrolytic cell showing the first embodiment of the present invention.

FIG. 6 is a front view of the electrolytic cell showing the first embodiment of the present invention.

FIG. 7 is a plan view of the electrolytic cell showing the first embodiment of the present invention.

FIG. 8 is a cross-sectional view of an electrolytic cell showing a second embodiment of the present invention.

[Description of sign]

 1 Electrolyzer 5 Tank body 6 Lid 7 to 11 Downward flow path 12 to 15 Upward flow path 17 Electrode unit 34 Dive plate 35 Overflow plate 36 Gas zone 37 Electrode plate 38 Holding plate 39 Rectifying plate 40,41 Slit

Claims (3)

[Claims] 1. An electrolytic cell (1) is provided with an electrode unit (17) comprising a plurality of electrode plates (37), and diluted salt water is used as the electrode unit.
(17) in the salt water electrolysis device for electrolysis between the electrode plates (37) to produce hypohypoxine, the electrolytic cell (1)
The downward flow channels (7) to (11) in which the diluted salt water flows downward and the upward flow channels (12) to (15) that flow upward are alternated in a zigzag pattern from the upper side to the lower side. Placed in the upward flow path
On (12) to (15), place the electrode unit (17) so that its electrode plate (37) is in the vertical direction along the flow direction of the diluted salt water, and place the gas zone in the upper part of the electrolytic cell (1). (36) The salt water electrolysis device for hypochlorous liquid production, characterized by being provided. 2. The flow passage area of the downward flow passages (8) to (10) is made larger than the flow passage area of the upward flow passages (12) to (15).
(8) to (10) are provided with a cooling means (16) for cooling the diluted salt water, The salt water electrolysis apparatus for hypochlorous liquid production according to claim 1, characterized in that. 3. An electrolysis tank (1) having a dip plate (34) for guiding the diluted salt water downward and an overflow plate for guiding the diluted salt water upward and overflowing the diluted salt water from the upper end to the downstream side. By alternately arranging (35), downward flow passages (7) to (11) and upward flow passages (7) to (11) in the electrolytic cell (1) due to the submerged plate (34) and the overflow plate (35). 12)
To (15) are formed, the salt water electrolysis apparatus for hypochlorous liquid production according to claim 1 or 2.