JPH1085751A - Water treatment device and water treatment filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the stabilized sterilization for a long period of time by inserting a pair of electrodes composed of a metal or an alloy eluting sterilizing metallic ions into a storage tank with a water diffusion opening and a water drain opening and applying positive and negative voltages alternately. SOLUTION: A water treatment device 1 is constituted of a storage tank 2 with a water introduction opening 3 and water to be treated and a water drain opening 4 and a pair of electrodes 5A and 5B inserted into the storage tank 2. The electrodes 5A and 5B are formed of a metal or an alloy eluting sterilizing algacidal metallic ions of gold, silver or the like. It is desirable that the electrodes 5A and 5B are composed of a same quality material. The electrodes 5A and 5B are connected together by an anode circuit C1 and a cathode circuit C2 at the contact points (a) and (b) of a main power source E1 and switches SW1 and SW2 . Positive and negative voltages are applied alternately to the electrodes 5A and 5B by the changeover operation of the switches SW1 and SW2 . Metallic ions are eluted alternately from both electrodes 5A and 5B by the arrangement to prevent the formation of deposit films on the electrodes, and a device can be used stably for a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus and a water treatment filtration apparatus for removing microorganisms and algae contained in water.

[0002]

2. Description of the Related Art Conventionally, in order to remove microorganisms and algae contained in water, for example, an electrode made of a metal that elutes bactericidal metal ions is inserted into a metal storage tank, and a positive voltage is applied to the electrode. At the same time, there is provided a sterilizer for applying a negative voltage to the storage tank to elute germicidal metal ions from the electrode into the water in the storage tank (Japanese Patent Application Laid-Open No. 61-10129).
No. 6).

[0003]

In the conventional sterilizing apparatus described above, since cations in water precipitate on the surface of the negative electrode and a film of the precipitate is formed with time, energization is hindered by the film of the precipitate. As a result, there is a problem that stable sterilization cannot be performed for a long time.

[0004]

According to the present invention, a water inlet (3) and a drain (4) are provided as means for solving the above-mentioned conventional problems.
Electrodes (5A, 5B) made of a metal or alloy that elutes a pair of bactericidal metal ions are inserted into the storage tank (2) having
The electrode (5A, 5B) is provided with a water treatment device (1) in which positive and negative voltages are alternately applied, and further comprises a filtration device (8) connected to a stage subsequent to the water treatment device (1). A water treatment filtration device is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 shows a specific example of the water treatment apparatus (1) of the present invention.
Is a storage tank having a water inlet (3) and a drain (4) for treated water.
(2) and a pair of electrodes (5A, 5A) inserted into the storage tank (2).
B), and the electrodes (5A, 5B) are, for example, gold, silver, copper,
The material is a metal or alloy that elutes sterilizing algicidal metal ions such as brass. The electrodes (5A, 5B) are desirably made of the same material.

[0006] The electrode (5A, 5B) and the main power supply E ₁ is in, is Sashidesa from the anode of the main power source E _1, the middle switch SW ₁ end with bifurcated, SW ₂ of the contact a, a an anode circuit C ₁ which is a, is Sashidesa from the cathode of the main power source E _1, end and bifurcated in the middle pair of switches SW _1, SW ₂
Contacts b, b and are being a circuit consisting of the cathode circuit C ₂ Metropolitan are connected, the pair of switches SW _1, SW ₂ is operated by the coil A in conjunction, the said coil A timer T _M of coil power supply E ₂ is connected via a.

[0007] In the above configuration, the water to be treated is a water inlet.
It is introduced from the headrace (6) into the storage tank (2) via (3),
After being subjected to sterilization and algicidal treatment by a metal cation eluted from one of the electrodes (5A, 5B) to which a voltage is applied in the storage tank (2), it is discharged from a drain port (4). On this occasion,
Switch SW _1, the coil power source to the coil A of the SW ₂ E ₂
If the current is supplied intermittently through the timer T _M and the current is not supplied to the coil A, the switch SW
₁ , the a contact is connected, the switch SW ₂ is connected to the b contact, a positive voltage is applied to the electrode (5A), a negative voltage is applied to the electrode (5B), and the electrode (5A) is connected. processing bactericidal algicidal metal ions are eluted in water, if the current to the coil a is supplied, b contact is connected to the switch SW _1, a contact is connected to the switch SW _2, the electrode (5A ) Is applied with a negative voltage, and the electrode (5B) is applied with a positive voltage. In this case, the germicidal and algicidal metal ions are eluted from the electrode (5B) into the water to be treated.

[0008] When the positive voltage to the electrode (5A) or electrode (5B) is applied, the anion contained in the for-treatment water, eg _{^{Cl -, SO 4 -, NO}} 3 - , etc., or eluting the anion The reactant with the metal ion tends to precipitate on the surface of the electrode (5A) or the electrode (5B), but when a negative voltage is applied to the electrode (5A) or the electrode (5B), the anion is removed from the electrode (5A). ) Or from the electrode (5B) and is prevented from depositing on the electrode surface.
The cycle of applying the positive and negative voltage alternately is usually 3 to 5 minutes.

A filtration device (8) may be connected to the downstream of the water treatment device (1) as shown in FIG. The filtering device (8) shown in FIG. 2 comprises a container (9) and a filter tube (10) inserted in the container (9).
On the outside of (10), the water conduit (7) and valve (12)
A drain discharge path (11) interposed is connected, and a three-way valve (15) is provided inside the filter tube (10) from the filtrate discharge path (13) and the water conduit (7).
And a backwash pressure introduction path (14) that branches off through the connection. Further, a pressure release path (16) in which a valve (17) is interposed and a pressure sensor (18) are connected to the water conduit (7).
A pressure storage tank (19) is connected to (9), and
In (7), a pump (27) is interposed in front of the three-way valve (15).

As shown in FIGS. 3 and 4, the filter tube 10 has a base tube 20, an annular magnet 21 and an annular spacer alternately fitted and stacked outside the base tube 20. 22), and a magnetic powder layer magnetically magnetized around the annular magnet (21) to form a filter layer.
The base cylinder (20) has a closed upper end, a large number of holes (24), and a base (20A) attached to the root. The annular magnet (21) can be used as either a permanent magnet or an electromagnet, and the annular spacer (22) has a large number of holes.
(25) is provided, and the hole (24) of the base cylinder (20) and the hole (25) of the annular spacer (22) are set so as to communicate with each other.

The magnetic powder used for the magnetic powder layer (23) can be a magnetic material powder, but it is preferable to use a ferrite powder in consideration of corrosion resistance. The inside and outside of the magnetic powder layer (23) are held by a net (26).

The filter tube (10) is inserted into the container (9) from below, and the base (20A) of the filter tube (10) and the lower edge of the container (9) are connected to each other by clips or sealing means (not shown). Are tightly fixed.

In the above construction, the water to be treated, which has been subjected to the germicidal and algicidal treatment by the water treatment device (1), is introduced into the vessel (9) of the filtration device (8) from the headrace (7) by the pump (27). The water to be treated is passed through the magnetic powder layer (23) of the filter tube (10) from outside to inside while the solid content contained in the water to be treated is removed by filtration, and the filtrate is Flows into the base tube (20) through the holes (24, 25) and is discharged from the filtrate discharge passage (13).

When the magnetic powder layer (23), which is a filter layer, becomes clogged, the filtration pressure gradually increases, but the pressure is accumulated by a pressure accumulation tank (19) to prevent the filtration pressure from sharply increasing. When the filtration pressure reaches a predetermined pressure, this is sensed by a pressure sensor (18), the operation of the pump (27) is stopped, and the valve (17)
To release the pressure in the container (9) from the pressure relief passage (16),
Open the valve (12) and drain (11) the container (9).
The water to be treated remaining inside is eliminated.

Next, the valve (17) of the pressure release passage (16) and the valve (12) of the drain discharge passage (11) are closed, and the water conduit (7) and the backwash pressure introduction passage (14) are opened by the three-way valve (15). And the pump (27) is operated again to apply the water pressure to be treated from the inside to the outside of the filter tube (10). At this time, it is desirable that the pump (27) is operated intermittently to apply the pressure of the water to be treated in the filter tube (10) in a pulsed manner.

Although the clogging of the magnetic powder layer (23) is eliminated by the backwashing described above, when the annular magnet (21) is an electromagnet, the current to the annular magnet (21) is cut so that the magnetic powder layer (23) is cut off. If the magnetic attraction force to the magnetic powder layer (23) is eliminated, the magnetic powder in the magnetic powder layer (23) is easily moved by the backwash pressure, and the backwash effect is improved. Further, the magnetic powder layer (23) may be loosened by applying vibration to the filter tube (10).

When the backwashing is completed, the pump (27) is stopped, the valve (17) is opened, the pressure in the vessel (9) is removed from the pressure release path (16), and the valve (12) is opened. Drain drain (1
Drain from 1). Further, a magnetic powder layer formed by the above backwashing
If the clogging of (23) becomes difficult to remove, remove the filter tube (10) from the container (9), remove the annular magnet (21) and spacer (22) from the base tube (20), and disassemble. Then, the magnetic powder layer (23) can be loosened and washed, etc., so that clogging can be easily and fundamentally eliminated. Further, the magnetic powder layer (23) can be easily updated.

The above water treatment filtration apparatus is applied to a cooling water system as shown in FIG. 5, for example. In the figure, (28) is a cooling tower, and cooling water is supplied to the cooling tower (2).
Cooled by passing through 8) from above to below, stored in the circulation tank (29), taken out by the pump (30), supplied to the cooling target such as a condenser, and returned to the cooling tower (28) after heat exchange However, a part of the cooling water is taken out from the circulation tank (29) to the water channel (6), sterilized by the water treatment device (1), subjected to algicidal treatment, and filtered by the filtration device (8). It is returned to the circulation tank (29).

In addition to the above embodiments, a sintered body of metal or ceramic, a semi-welded body of plastic beads, a filter cloth tube, or the like may be used as the filter tube of the filter device. It may be used, and the apparatus of the present invention is also applied to purification of water in lakes, ponds, and the like.

[0020]

According to the water treatment apparatus of the present invention, the electrode surface made of a metal or an alloy that elutes germicidal metal ions is prevented from being covered with the anion precipitate film.
Stable water sterilization and algicidal treatment can be performed over a long period of time.

[Brief description of the drawings]

 1 to 4 show one embodiment of the present invention.

FIG. 1 is an explanatory view of a water treatment apparatus.

FIG. 2 is an explanatory view of a water treatment filtration device.

FIG. 3 is an exploded perspective view of a filter tube.

FIG. 4 is an upper partial cross-sectional view of a filter cylinder.

FIG. 5 is an explanatory diagram of cooling water treatment.

[Explanation of symbols]

 1 Water treatment device 2 Storage tank 3 Water inlet 4 Drain outlet 5A, 5B electrode 8 Filtration device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 520 C02F 1/50 520A 531 531D 550 550H 560 560F

Claims (4)

[Claims] 1. A pair of electrodes made of a metal or an alloy that elutes a germicidal metal ion is inserted into a storage tank having a water inlet and a drain, and positive and negative voltages are alternately applied to the electrodes. Water treatment device characterized by the following 2. A water treatment filtration device comprising the water treatment device according to claim 1, and a filtration device connected downstream of the water treatment device. 3. The filter device comprises a container and a filter tube inserted in the container, wherein a water conduit and a drain discharge line are connected to the outside of the filter tube in the container. The water treatment filtration device according to claim 2, wherein a filtered water discharge channel and a backwash pressure water channel are connected to the inside of the tube. 4. The filter tube has a base tube provided with a large number of holes, an annular magnet and an annular spacer alternately stacked outside the base tube, and magnetically formed around the annular magnet. 4. The water treatment filtration device according to claim 3, comprising a magnetic powder layer.