JPS6019090A - Water purifier - Google Patents

Abstract

PURPOSE:To obtain purified water capable of being used as drinking water, by forming a water purifying part formed of an adsorbing material for removing a noxious substance to an anode arranged side while providing an electrolytic sterilizing means between an anode and a cathode so as to connect the same to a DC power source. CONSTITUTION:A tank is divided by a cylindrical partition wall material 1 and an anode 2 is arranged to the outside of the partition wall material 1 while a cathode 3 is arranged to the inside thereof and a cylindrical adsorbing material is arranged to the arranged pipe side of the anode 2 in coaxial relation to the partition wall material 1 and a water purifying part 5 for obtaining treated water from raw water supplied from a water inlet 6 is formed by said adsorbing material 4. The partition wall material 1 is formed of a semi-permeable membrane and an anode 2 comprises a metal plate prepared by coating titanium substrate with platinum group metal oxide and a cathode 3 is made of a stainless steel plate and a fibrous activated carbon is adapted to the adsorbing material 4. Raw water supplied to the water purifying part 5 from the water inlet 6 is treated with the adsorbing material 4 while treated water enters the inside of the partition wall material 11 through a check valve 9 and discharged to the outside from a water outlet 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water purifier using an adsorbent for removing harmful substances.

Conventionally, in water treatment processes that use adsorbents such as activated carbon to remove harmful substances from raw water, bacteria are present in the tank when stagnant water is produced, especially during operation stoppages. In particular, bacteria often breed abnormally in activated carbon. In order to suppress the proliferation of such bacteria, silver and/or a silver compound was conventionally allowed to coexist in the tank, thereby sterilizing the bacteria in the activated carbon. In the case of this sterilization method, even if silver and/or silver compounds are initially coexisting and have a sterilizing effect, after a long period of time, acidic substances adhere to the silver and/or silver compounds and sterilize them. It became impossible to elute the amount of A8+ required for this, and it became almost impossible to exert the bactericidal effect. In addition, variations in the chlorine ion concentration in the raw water and acidic substances (= 1st place, etc.) may cause A8
The amount of + to be eluted tends to be unstable, and sometimes there is a possibility that it may be eluted in excess and cause harm to the human body.

For these reasons, there has been a demand for a water purifier that has means that can safely and over a long period of time exhibit a sterilizing effect.

Therefore, the inventors of the present invention have developed
As a means to sterilize the inside of the tank? Focusing on lowering the pH of zonal water, 9. ;i; Sterilization was made possible by electrolyzing the retained water to lower the pH of the acidic group retained water on the side where the adsorbent was installed.

The present invention has been completed based on the above-mentioned points of interest, and has been developed to effectively reduce the accumulated water, particularly the accumulated water in the adsorbent, in a water purification structure that obtains treated water from raw water using an adsorbent for removing harmful substances, etc. The object of the present invention is to provide a water purifier configured to convert electrolyzed acidic water into electrolyzed acidic water for sterilization. Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a side cross-sectional view of essential parts of an embodiment of a water purifier to which the present invention is applied, in which 1 is a partition material, 2 is an anode, 3 is a cathode that also serves as a water passage, and 4 is a material for removing harmful substances, etc. 5 is a water purification part, 6 is a water inlet, 7 is a water outlet, 8 is a gas vent valve, and 9 is a check valve.

The inside of the tank is divided by a cylindrical partition material, and an anode 2 and a cathode 3 are arranged on the outside and inside of the partition material 1, respectively, and a cylindrical adsorbent is placed coaxially with the partition material 1 on the side where the anode 2 is arranged. 4 are disposed, and the adsorbent 4 forms a water purification section 5 that obtains treated water from raw water from the water inlet 6.

Furthermore, during operation, the water purification section 5 communicates with the inside of the partition wall material 1 via the check valve 9, and the inside of the partition wall material 1 communicates with the water outlet lower through the passageway of the cathode 3. . In addition, a DC power supply device (not shown) is provided between the anode 2 and the cathode 3.
The water purification section 5 has an electrolytic sterilization means for converting the accumulated water in the adsorbent 4 of the water purification section 5 into acidic water.

In the above description, the partition material 1 is a semipermeable membrane, the anode 2 is a metal plate made of titanium coated with white metal oxide, the cathode 3 is a stainless steel plate, and the adsorbent 4 is fibrous activated carbon. Moreover, the cathode 3 can be made into a simple columnar frame structure and a water outlet can be provided separately.

The raw water supplied to the water purification unit 5 from the water inlet 6 becomes treated water by the adsorption unit 4 and enters the inside of the partition wall material 1 through the check valve 9.
The water is discharged to the outside from the water outlet lower part through the water passage of the cathode 3.

If there is currently stagnant water in the water purification unit 5 due to operational stoppages, it is common for bacteria to increase significantly over time, and bacterial contamination of the stagnant water in the adsorbent 4 is particularly noticeable. becomes. However, in the present invention, by operating the electrolytic sterilization means, the accumulated water in the adsorbent 4 is made into acidic water by the anode 2 and sterilized, so that the proliferation of bacteria in the accumulated water can be suppressed.

FIG. 12 is a side cross-sectional view of a main part of an embodiment to which the present invention is applied, in which a rod-shaped anode 2 is arranged inside a cylindrical partition material 1, and a cathode 3 is arranged outside, and the anode 2 arrangement side partition wall material 1
This is a case in which a cylindrical adsorbent 4 is arranged coaxially with. This is a relationship in which the anode and cathode are arranged oppositely to the case of FIG. 1. In FIG. 2, the same reference numerals as those in FIG. 1 other than those mentioned above indicate corresponding parts.

Raw water supplied to the water purification unit 5 from the water inlet 6 becomes treated water by the adsorbent 4, enters the outside of the partition material 1, and reaches the water outlet lower. Also in the case of the present invention, by operating the electrolytic sterilization means, the water accumulated in the adsorbent is made into acidic water by the anode 2=, and this is sterilized.

Furthermore, although FIGS. 1 and 2 illustrate the case where the present invention is applied to a water treatment device having a cylindrical structure, it goes without saying that the present invention can also be applied to a flat plate structure as shown in FIG. be. In addition, in FIG. 3, the same symbols as those in FIG. f51 indicate corresponding parts.

4 and 5 are side sectional views of main parts of pond embodiments to which the present invention is applied, and each figure shows the ionized water generation section 10 that generates alkaline ionized water from the treated water of the water purification section 5. This is the case when configured with Ionized water generation section 10 (10
') also serves as the cathode 3 of the electrolytic sterilization means, and an anode 12 is coaxially connected to the inside of the cathode 3 via a diaphragm 1i (ii').
(12') is placed. In addition, a common DC power supply device is connected between each electrode, between the anode 2 and the cathode 3 and between the anode 12 and the cathode 3, and the electrolytic sterilization means of the water purification section 5 and the electrolysis means of the ionized water generation section 10 are connected. Each is grooved. In addition, in Fig. 4, a relatively high water permeability membrane is used as the diaphragm 11, and this is provided in close contact with the anode 12, which has a large number of holes at equal intervals, and in Fig. 0'S5, the diaphragm 11 is
A material having relatively low water permeability is used as the anode 1', and is provided around the rod-shaped anode 12'. In addition, Figure 4 and! In lI's5 figure,! @1 The same symbols as those in the figure indicate corresponding parts.

Raw water supplied to the water purification section 5 through the water inlet 6 becomes treated water by adsorption 4, and is sent to the ionized water generation section 10 (10') configured inside the partition material 1. During operation when raw water is continuously supplied, the ionized water generation unit 10 (1
By disabling the electrolytic means (0'), alkaline ionized water is generated by the treated water of the water purification section 5 between the diaphragm 11 (11') and the cathode 3, and the diaphragm 11 (11') is
Acidic water is generated between the anode 12 (12') and the anode 12 (12'). This alkaline ionized water and acidic water are discharged to the outside from the water discharge lowers a and 7b, respectively.

Now, if stagnant water is generated in the water purification section 5 due to the stoppage of operation, the electrolytic sterilization means of the water purification section 5 can be activated (as explained in FIGS. 1 to 3) to remove water in the adsorbent 4. ?・n) Distilled water is made acidic by the anode 2 and sterilized.

Therefore, when the operation is resumed, the treated water obtained through the adsorbent 4 will be sterilized and unremoved, and the ionized water generating section 10 (10') will generate alkaline ionized water from the clean treated water.

Next, the water treatment device to which the present invention is applied will be described in more detail based on experimental data.

"Experimental method" (1) Prepare the apparatus of the present invention having the structure shown in Figure 1 as an experimental apparatus, store tap water in it, perform H;) distillation under the following conditions, and then ;i) All of the retained water is sampled aseptically, and a general bacteria test and coliform bacteria test are attempted based on the tap water quality testing method, and the bactericidal effects under each retained water condition are compared. However, the tap water used is Fuchu city tap water, Tokyo.

Condition No, ]: Constant current electrolysis No. to 20m of standing water
, 2: Electroless water retention, No. 1, No. 2, so 5) Water time is 24°48.72.96, 144. respectively. It's time.

However, before the residence starts, do you have to put it in the tank in advance? ? i) The number of general bacteria in the distilled water was tested.

(2) Also, during the experiment according to No. 1 of (1) above,
Determine the pH change of the water retained in the adsorbent.

1-Results" According to the experimental method (1) described above, the experimental results shown in the following table could be obtained.

As shown in the table, when the operation is stopped, by keeping the electrolytic sterilization means functioning as in No. 1, the water retention time is 24 hours.

In each case of 48 hours, 96 hours, and 144 hours, the number of general bacteria is 30/01 or less, which is the respective number of bacteria before retention], 6X] 02/
I output 6.8 x 10 pieces/+n l.

5.2×10 pieces/+n1. 2, 4. X 102 pieces/
The value was less than +nl, '9.5 x 10 pieces/ml. Furthermore, coliform bacteria were not detected at each water retention time.

However, when water is left to flow without electrolysis, as shown in No. 2, while the operation is stopped, the number of general bacteria increases by an order of magnitude greater than the number of bacteria before retention. And what about coliform bacteria? It was detected when the di-water opening time was 6 hours and 144 hours.

On the other hand, according to experimental method (2), when the electrolytic sterilization means was used in several ways (i:l, 1 water), the time (T)-1+l-1 characteristic curve as shown in Figure 6 was measured. For example, after 5 hours, the 1+H value of the accumulated water in the adsorbent is 4.5, and after 10 hours, the pH value is 3.5.After 15 hours, the pH value is 3.5. p I-
1 value: 3.2. After 20 hours, the pH value was 3.0.

From the measurement results using the experimental method (]) and (2) below,
It can be seen that by activating the electrolytic sterilization means to make the accumulated water in the tank, particularly in the adsorbent, acidic water, the accumulated water can be sterilized.

Then, as shown by the chain line in FIG. 6, the pH value is 4.
We also conducted an experiment to confirm that effective sterilization can be performed if the value is 5 or less. In addition, chlorine generated near the anode due to electrolytic reaction dissolves in water and becomes hypochlorous acid, which has sterilizing power. When p I (lJ' is low, hypochlorous acid exists in a large amount in a molecular state, but conversely, when p I-1 is high, it is largely dissociated into hypochlorous acid ions.

C12+1-120 HOC1+HCl 10CI''
I-1+ 10 CI- It is generally said that the sterilizing power of hypochlorous acid is higher than that of the molecular state, so the pH of the acidic chamber on the anode side is lowered by electrolytic sterilization means as in the present invention. If this can be maintained, the generated chlorine can also be present in a highly sterilizing state.

Note that the 1+14 range as a growth condition for bacteria is generally considered to be 6.5 to 7.5, and public tap water 1+14 also conforms to this condition. However, if it is removed from this area, it becomes difficult for sterilization to propagate, and in order to suppress sterilization and propagation, 1) lowering I is usually carried out.

In addition, when reducing the pH value to 4.5 or less, the amount of electricity required and the amount of electricity required are determined by the type and amount of activated carbon, the tap water used, the background history such as the difference in the IIH value of the retained water before sterilization, and the difference in the IIH value of the tank. Depends on structure, size, etc. However, in the present invention, if the electrolytic sterilization means is preferably configured to maintain the accumulated water at a value of 4.5 or less, effective sterilization can be performed in any case. It is something.

As is clear from the above explanation, the present invention converts the accumulated water in the adsorbent into electrolyzed acidic water and sterilizes the accumulated water, so that the water treated by the adsorbent can always be kept clean. be. Therefore, according to the present invention, it is possible to provide purified water that can be safely consumed at all times.

Furthermore, if a configuration is adopted in which alkaline ionized water is continuously produced from the above-mentioned clean treated water, it is possible to provide aqueous alkaline ionized water that does not require separate sterilization treatment.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a main part of one embodiment of a water purifier to which the present invention is applied, and FIGS. 2 and 3 are side sectional views of main parts of other embodiments to which the present invention is applied. , this calculation is for water purification only. Further, FIGS. 4 and 5 are side sectional views of main parts of other embodiments to which the present invention is applied, respectively,
These are cases in which alkaline ionized water can be generated after water purification. Math 6I again! IIt interval (T)-1'
l-1 wheel-Il1 song L? ShiT"A3゜1: Bulkhead visit, 2:
Anode, 3: Cathode, 4: Adsorbent, 5: Water purification section, 6: Water inlet, 7 + 7a, 71): Water outlet, 8: Gas vent valve,
9: Non-return L1 (1, 10': Ionized Water Generation Department Patent Applicant Advance Development Research Institute Co., Ltd. Procedural Amendment (Method) November 22, 1981 Commissioner of the Patent Office Kazuo Wakasugi 1, Incident Indication 1982 patent application IB1.26872 2, name of the invention water purifier 3, relationship with the case of the person making the amendment Patent applicant address 5-7 Nihonbashi Kozuki-cho, Chuo-ku, Tokyo 103 (
Place, 03 667 1551. ) October 1, 1981 (Shipping date: October 25, 1981)

Claims (1)

[Scope of Claims] (1) The inside of the tank is divided by a partition material, and an anode is placed on one side and a cathode is placed on the other side, and an adsorbent for removing harmful substances etc. is used on the side where the anode is placed to connect the electrodes. 81) A water purifier characterized in that it is configured to include an electrolytic sterilization means for converting the accumulated water into acidic water by connecting a DC power source to the water purifier. (2) The tank is divided by a partition material, an anode is placed on one side and a cathode is placed on the other side, and a water purification section is formed on the side where the anode is placed to obtain treated water from raw water using an adsorbent for removing harmful substances, etc. The water purification section further includes an ionized water generation section that generates alkaline ionized water from the treated water of the water purification section. A water purifier characterized in that it is configured to include electrolytic sterilization means for converting accumulated water into acidic water by connecting an old DC power source.