JP3120417B2 - Non-diaphragm type electrolytic cell - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electrolytic cell for producing acidic water and / or alkaline water by electrolysis of water, and more particularly, to a non-diaphragm type electrolytic cell.

[0002]

2. Description of the Related Art Conventionally, an electrolyzer for producing acidic water and alkaline water by electrolysis of water is divided into a non-woven fabric, an unglazed plate, etc., at the center of opposed electrodes by a diaphragm which partially restricts the passage of water. By applying voltage to both electrodes, water is electrolyzed to generate acidic water and alkaline water.

[0003]

However, a problem of the electrolytic cell using the above-mentioned diaphragm is that bacteria and microorganisms may adhere to and proliferate on the diaphragm. This is to cause clogging and cut off the flow of current to lower the electrolysis efficiency.

That is, bacteria such as Escherichia coli easily inhabit the water-wetted membrane, and the above-mentioned membrane is attracted to the electrodes and cations are drawn toward the cathode and anions are drawn toward the anode. Although it will pass, this ion is not limited to hydroxyl ions and hydrogen ions, but also includes calcium ions, magnesium ions, and silicon contained in water, and the silicon itself is an insulator, This is because calcium ions and magnesium ions become insoluble and insulating precipitates such as magnesium carbonate and calcium carbonate and adhere to and deposit on the diaphragm.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an electrolytic cell which can omit a diaphragm, has no breeding source of bacteria and microorganisms, and can guarantee efficient electrolysis for a long period of time. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention provides a non-diaphragm type electrolytic cell (1).
Comprises a container (1a / 1b) having a tap water inlet (2), an acidic water outlet (3) and an alkaline water outlet (4),
A pair of flat anode plate (8) and cathode plate (9) are placed in the container (1a / 1b) without a diaphragm between them, and a laminar flow is formed when water is passed. An electrolytic flow path (7a) is formed between the electrode plates (8, 9) by being opposed in parallel with a small gap, and the container (1)
a / 1b) is provided with a tank chamber (6) having a predetermined volume communicating with the water inlet (2), and the upstream side portion of the electrolytic flow path (7a) is provided over the almost entire width of the tank chamber (6).
The downstream portion of the electrolytic flow path (7a) is connected to the acidic water outlet (3) on the anode plate (8) side, and the alkaline water outlet (3) is connected on the cathode plate (9) side. 4).

[0007]

Therefore, in the electrolytic cell of the present invention, the water flowing from the water inlet 2 first flows into the tank chamber 6 and then into the electrolytic flow channel 7a. Since the tank chamber 6 has a predetermined capacity and the electrode gap is narrow, water flows into the electrolytic flow path 7a from the tank chamber 6 with a resistance. First, the inside of the tank chamber 6 is filled. Then, water flows from the tank chamber 6 into the electrolytic flow path 7a. However, since the gap between the electrode plates 8 and 9 is minute, the water flow is viscous while flowing along the surfaces of the electrode plates 8 and 9. Under the action, the water flow becomes a laminar flow which is referred to in rheology while flowing in the electrolytic flow channel 7a.

Since the laminar flow has a tendency not to change its flow direction unless the flow path is bent or an obstacle is present, water in the electrolytic flow path 7a is supplied to the surface of the anode electrode plate 8 on the anode electrode plate 8 side. Flows along the surface of the cathode electrode plate 9 on the side of the cathode electrode plate 9, and water on the side of the anode electrode plate 8 and the cathode electrode plate 9
The water on the side has the effect of flowing without mixing and without using a conventional diaphragm.

A predetermined DC voltage is applied between the anode electrode plate 8 and the cathode electrode plate 9, and the water flowing through the electrolytic flow path 7 a during that time passes through an electric field and is electrolyzed. Is the same as

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 denotes an electrolytic cell, and the electrolytic cell 1 is formed in a thin vertical two-part container shape by one side container part 1a and the other side container part 1b. It is a matter of course that both the one-side container part 1a and the other-side container part 1b are made of a waterproof material such as a synthetic resin. It is desirable to use a material. Also, this one-side container part 1
a and the other-side container portion 1b are formed in a thin container shape having airtightness by inserting a packing 11 into the fitting portion and fixing each other with fastening screws 12, 12, 12,....

A tap water inlet 2 is provided at one end of the electrolytic cell 1, and an acidic water outlet 3 and an alkaline water outlet 4 are provided at the other end. That is, in the electrolytic cell 1, the tap water flowing from the tap water inlet 2 flows out of the acidic water outlet 3 and the alkaline water outlet 4 through the electrolytic bath 1.

Further, in a portion of the electrolytic cell 1 downstream of the portion where the tap water inlet 2 communicates, the electrolytic cell 1 has a cross-sectional area smaller than the cross-sectional area of the tap water inlet 2 over substantially the entire width thereof. Weir 5 forming slit-shaped constricted flow path 10
A tank chamber 6 having a predetermined capacity and the same width as that of the slit-shaped constricted flow path 10 is provided upstream of the weir 5. In the present application, the total width of the electrolytic cell 1 is the inner dimension in the left-right direction of “FIG. 1” and “FIG. 2”.
(Accurately, the dimensions of the entire width of the electrolytic flow channel 7a described later).

The slit gap (the width in the left-right direction in FIG. 3) of the slit-shaped narrowed flow path 10 is smaller in the cross-sectional shape of the slit-shaped narrowed flow path 10 than in the tank chamber 6. It is set as follows. In the illustrated embodiment, a pre-stage weir 5a is also provided at the upstream part of the weir 5, and a pre-stage tank chamber 6a is further provided at the upstream part thereof so that water passes through the two stages of the weir 5 and the pre-stage weir 5a. But this front stage weir 5a
And the former tank chamber 6a may be omitted. Also, the weir 5 is provided with rectifying projections 13, 13, 13,... In the vertical direction as shown most clearly in FIG. 2, but the rectifying projections 13, 13, 13,. It is possible.

In the electrolytic cell 1, an electrolytic cell chamber 7 is provided downstream of the slit-shaped constricted flow path 10, and a pair of flat anode electrode plates 8 and cathode electrodes are provided in the electrolytic cell chamber 7. The plate 9 is accommodated in parallel at the center thereof with an electrolytic flow channel 7a communicating with the tank chamber 6 through the slit-shaped narrow flow channel 10 in parallel. The gap between the electrode plates 8 and 9 is set so small that a laminar flow is formed in the electrolytic flow channel (7a) when flowing water.

The material of the anode electrode plate 8 and the cathode electrode plate 9 is not particularly limited, but it is a matter of course that a corrosion-resistant metal is used, and there is no gap between the anode electrode plate 8 and the cathode electrode plate 9. The application of a predetermined DC voltage by the power supply device as shown in FIG. 5 is the same as in the prior art.

The power supply device shown in FIG. 5 has a transformer 31, a rectifier 32, a stabilizing circuit 33, a water pressure switch 34, and an applied voltage switch 35, which are connected as shown.

As shown in FIG. 4, the water pressure switch 34 is such that the power supply circuit is closed when water pressure is applied to the flow path. In the example of FIG. A reduced diameter portion 41 is provided in the middle of the conduit body 40 to be interposed at an appropriate position such as a portion, and a piston 42 that can enter and exit from a cylinder is inserted into a portion upstream of the reduced diameter portion 41 of the conduit body 40,
The water pressure switch 34 composed of a micro switch is opened and closed by the movement of the piston 42. In FIG. 4, reference numeral 43 denotes a packing, and 44 denotes a packing 4.
A pressing ring 3 and a packing 45 are shown. In the figure, the spring is not shown.
Goes down and the water pressure switch 34 is open (OFF state)
It is made to become.

In the power supply device, a voltage is applied so that the anode electrode plate 8 is always on the left side and the cathode electrode plate 9 is on the right side, and when the applied voltage switch 35 is operated, the cathode side and the anode side are connected. Is applied in reverse. Note that this reverse application is performed in order to release the deposits and deposits by applying a reverse current when cleaning the electrode surface as is conventionally performed.

The slit-shaped constricted flow path 10 and the electrolytic flow path 7a between the anode electrode plate 8 and the cathode electrode plate 9 are
It is more practical to have substantially the same dimensions and to be on substantially the same plane since turbulence is unlikely to occur in the flow of water.

The upstream end of the acidic water outlet 3 is located downstream of the electrolytic flow channel 7a on the anode electrode plate 8 side, and the upstream end of the alkaline water outlet 4 is located downstream of the electrolytic flow channel 7a on the cathode electrode plate 9 side. Communication with the side.

That is, the acid water outlet 3 has its upstream end located on the anode electrode plate 8 side downstream of the electrolytic flow path 7a, so that it flows along the surface (working surface) of the anode electrode plate 8 and is subjected to acid electrolysis. Out of the water, the alkaline water outlet 4
Flows upstream along the surface (working surface) of the cathode electrode plate 9 on the downstream side of the electrolytic flow channel 7a so that water alkalized by electrolysis flows out.

The cross-sectional area of the acidic water outlet 3 and the alkaline water outlet 4 is at least half the cross-sectional area of the electrolytic flow channel 7a formed by the gap between the anode electrode plate 8 and the cathode electrode plate 9. In this embodiment, the turbulence hardly occurs at the upstream portion, but in the illustrated embodiment, a collision corresponding to substantially half of the electrolytic flow channel 7a on the anode electrode plate 8 side is provided on the downstream side of the electrolytic flow channel 7a. A plate 14 is provided, and water flowing along the surface of the anode electrode plate 8 collides with the collision plate 14, and a folded gap 18 formed between the downstream end of the anode electrode plate 8 and the collision plate 14.
Flow into the turn-back channel 15, and the acidic water outlet 3 is provided at the downstream end of the turn-around channel 15. The folded flow path 15 has a bulging portion 16 bulging into the one-side container 1a.
(See FIG. 1) and is located along the back surface of the anode electrode plate 8.

Therefore, in the illustrated embodiment, the influence of the turbulent flow which may occur at the upstream portion of the acid water outlet 3 is
The position of the acidic water outlet 3 is set at a distance from the downstream end of the anode electrode plate 8, and the return flow path 15 is prevented from functioning as a tank chamber for collecting acidic water having a predetermined capacity.

Further, in the illustrated example, the water flowing along the surface of the cathode electrode plate 9 goes straight through the upper gap 19 formed between the collision plate 14 and the other side container 1b. The downstream side of the electrolytic flow channel 7a is provided with a downstream tank chamber 17 for recovery of alkaline water having a predetermined capacity and communicating with the electrolytic flow channel 7a via the upper gap 19, and the alkaline water outlet The upstream end of 4 is communicated with the downstream tank chamber 17.

That is, the downstream tank chamber 17 is interposed between the alkaline water outlet 4 and the electrolytic flow channel 7a, and has a predetermined capacity to make local pressure fluctuation uniform. Therefore, in the illustrated embodiment, the influence of the turbulent flow that may be generated at the upstream portion of the alkaline water outlet 4 is avoided by the pressure fluctuation equalizing action of the downstream tank chamber 17.

As described above, the folded channel 15 and the downstream tank chamber 17 are not always necessary. However, when the area of the anode electrode plate 8 and the cathode electrode plate 9 is reduced, the size is reduced. Has a remarkable turbulence prevention effect. In the illustrated example, one of the anode electrode plate 8 and the cathode electrode plate 9 forms the folded flow path 15, and the other forms the downstream tank chamber 17. Of course, there is no doubt.

In the figure, 21 is a screw hole for fastening the electrolytic cell,
Reference numeral 22 denotes a screw hole for fixing the electrode plate, and reference numeral 23 denotes a hole for extracting a lead wire of the electrode.

[0028]

As described above, the present invention does not use a diaphragm, which has been conventionally required, so that bacteria and bacteria
The present invention can provide an electrolytic cell that can be stably used for a long period of time without any microorganisms adhering and of course eliminating the fear of clogging of the diaphragm.

In the present invention, although the diaphragm is omitted, the electrode gap is reduced and the tank chamber 6 is provided, so that the water passing through the electrode gap becomes a clean laminar flow, and the alkaline water and the acidic water to be electrolyzed are mixed. That is, not only does the electrolytic efficiency not decrease, but also the diaphragm does not act as a kind of insulating material, so that the electrolytic efficiency increases and an efficient electrolytic cell can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of an electrolytic cell according to the present invention.

FIG. 2 is a front view of the other side container part 1b of the electrolytic cell.

FIG. 3 is a schematic sectional view taken along line AA of FIG. 1;

FIG. 4 is a cross-sectional view of a hydraulic switch used in the embodiment.

FIG. 5 is a power supply circuit diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolysis tank 1a One side container part 1b The other side container part 2 Upper water inlet 3 Acid water outlet 4 Alkaline water outlet 6 Tank room 7a Electrolysis channel 8 Anode electrode plate 9 Cathode electrode plate

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 1/46-1/48

Claims (1)

(57) [Claims] 1. A water inlet (2) and an acid water outlet (3).
(1a / 1) having a container and an alkaline water outlet (4)
b), wherein a pair of flat anode plates (8) and cathode plates (9) are provided in the container (1a / 1b) without a diaphragm interposed therebetween, and a laminar flow is formed when water is passed. An electrolytic flow path (7a) is formed between the electrode plates (8, 9) by being opposed in parallel with a minute gap as formed, and the water inlet (1a / 1b) is provided in the vessel (1a / 1b). 2) providing a tank chamber (6) having a predetermined capacity communicating with the tank chamber (6), and making an upstream portion of the electrolytic flow path (7a) communicate with the tank chamber (6) over substantially the entire width thereof; Is connected to the acidic water outlet (3) on the side of the anode plate (8) and to the alkaline water outlet (4) on the side of the cathode plate (9). Non-diaphragm type electrolytic cell (1).