JPS62197193A - Purifying device for drinking water - Google Patents

Abstract

PURPOSE:To sterilize bacteria a removing ozone dissolved into water with gas containing no ozone after aerating water with ozonized air prepared by an ozonizer. CONSTITUTION:Raw water of water to drink in an aeration tank 13B is aerated with ozonized air to carry out oxidative destruction of an organic substance, chlorine and the like and also sterilize. Next, a closing valve 1B is closed and a closing valve 1A is opened to send ozonized air to a first aeration tank 13A to contact ozonized air with water, to sterilize bacteria and get sterilizing ozonized air. Said sterilizing ozonized air is guided to an ozone degradation instrument 14 to degrade and remove co-existing ozone and separate sterilized air without ozone. Said sterilized air is sent into a second aeration tank 13B and dissolved ozone remaining in ozone treated water to provide water to drink. By said process, safe and tasty water is provided.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention can remove odor substances from drinking raw water. The present invention relates to a drinking water purification device that removes organic substances and the like and sterilizes the water to obtain drinking water.

[Conventional technology]

Tap water sources are becoming more and more polluted year by year, and in some regions, they are becoming toxic due to the contamination of solvents such as tricloethylene, and organic chlorine compounds that are produced when the chlorine injected for sterilization during the water purification process reacts with trace amounts of organic matter in raw water, causing mass proliferation. Odors and tastes caused by algae metabolites and residual chlorine have become a problem, and solutions to these problems are urgently needed.

As a solution to this problem, a purifier that passes tap water through an activated carbon column is known as a conventional drinking water purification device. As shown in Fig. 2, this device has a simple structure in which an activated carbon-filled column (!1) is placed in a water faucet.

Its operation will be explained next. When you open the water faucet FI+, tap water flows into the activated carbon-filled column, and the activated carbon packed inside adsorbs and removes odorous substances, trace organic substances, solvents such as trichlorethylene, and organic chlorine compounds. Chlorine, which is injected for the purpose of sterilization, also disappears by adsorption or catalytic decomposition by the activated carbon.In this way, purified drinking water is supplied from which harmful organic substances and substances that cause off-flavors and tastes have been removed.

[Problem that the invention seeks to solve]

However, in the case of the above-mentioned device, not only can it not be expected to have a significant removal effect on mold odor, which is the main odor in drinking water, but also harmful substances and substances that cause off-flavors are concentrated and adsorbed on the activated carbon, making it difficult to use the device. Depending on the conditions, adsorbed substances may leak out and provide poor quality water. Also, murder! ! Chlorine, which is an f-agent, is completely decomposed in the upstream part of the activated carbon column (2), and in the downstream part of the activated carbon column (2), bacteria breeds using the concentrated and adsorbed organic matter as a nutrient source, contaminating drinking water. There are cases.

As described above, it has been pointed out that conventional water purifiers using activated carbon have serious safety problems.

In order to improve the problems of water purifiers that use activated carbon, a new drinking water purification device that utilizes the strong oxidizing power of ozone has been devised. The drinking water purification apparatuses described in Japanese Patent Application Laid-open No. 50-166491 and Japanese Patent Application Laid-open No. 59-16612 fall under this category. As shown in the VC schematic diagram in Figure 2, this device consists of a raw air supply blower, an ozone generator (12
), aeration tank θ3), ozone decomposer θ41. and faucet (
Equipped with lFA.

The air supplied from the raw air supply unit (11) is converted into ozone-containing gas by the ozone generator θ, and then diffused into the drinking raw water, ie, the water to be treated, in the aeration tank α. Ozone in the diffused ozone-containing gas dissolves and oxidizes and decomposes organic substances and odorous substances.

In this way organic substances and odorous substances? The removed treated water is poured into a faucet (lI19-over 70-) and made available for drinking.

Although this drinking water purification equipment can remove organic substances and odor-tasting substances, there is a risk that the treated water with ozone still dissolved in it will be used for drinking, resulting in drinking ozone that has had its odor and strong oxidizing power removed. The problem is that it is not always possible to supply safe and delicious water. Incidentally, ozone dissolved in water is known to self-decompose, but it is also known that its half-life can range from several tens of minutes to several hours in clear water like tap water.

This invention was made to solve the above-mentioned problems, and an object thereof is to provide a drinking water purification device that can always supply safe and delicious water.

[Means for solving problems]

The drinking water purification device according to the present invention includes a first aeration tank that aerates ozonized air obtained by an ozone generator into water to obtain sterilized ozonated air, and a first aeration tank that decomposes and removes coexisting ozone in the sterilized and ozonated air. After aerating the ozonized air obtained by the ozone decomposer and the ozone generator into drinking raw water to remove and sterilize odorous substances and organic matter contained in the drinking raw water, the sterilized air is removed. It is equipped with a second aeration tank that removes dissolved ozone by aerating the ozone.

〔Example〕

The basis of this invention is that after bringing drinking raw water into contact with ozone,
The purpose is to remove ozone dissolved in water using a gas that does not contain ozone, but if sterile gas is not used at this time, even if dissolved ozone can be removed, bacteria will get mixed into the purified water and breed. Therefore, the present invention focuses on reliably and easily producing a sterile gas for removing dissolved ozone. In other words, it has been experimentally discovered that in a dry state, it is impossible to completely kill bacteria even if they come into contact with all ozone, and that complete killing can only be achieved in a humid atmosphere. It was found that a sterile gas can be easily obtained by once aerating an ozone-containing gas into water. In Jin's invention, ozonized air supplied from an ozone generator as a gas for removing dissolved ozone is passed through a small aeration tank to completely kill coexisting bacteria in a humid atmosphere, and then the coexisting ozone is decomposed and removed. To obtain a sterile and ozone-free gas, that is, sterile air.

An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 1, (IA) to (ID) are on-off valves, (10
1 is an air dryer, (18A) and (18B) are first and second aeration tanks, (14A) and (14B) are ozone decomposers,
a@ is a pump, (11 is a water tank.

Next, the operation will be explained. Raw air supply proa (■)
The pressurized raw material blast is dried in an air dryer (10) to a dew point of 120 degrees Celsius or below, and then, for example, an ozone generator using an electric discharge (a part of the oxygen contained in the raw material is converted to ozone by electric discharge within the frame). This ozonized air first passes through the on-off valve (IB) and then into the 5th ttl air tank (xsB) K.
The raw drinking water that has been fed in advance from the on-off valve (IC) is aerated, and the ozone it contains dissolves to oxidize and decompose existing substances that cause off-flavors, organic matter, chlorine, etc., and sterilize them. When the ozone aeration is completed in this way, the on-off valve (IB) is closed and the on-off valve (IA) is opened to allow the ozonated air to flow into the first aeration tank (18A) and bring the ozonized air into contact with water. to kill bacteria and obtain sterile ozonized air. This sterilized ozonized air is guided to an ozone decomposer (14A) filled with a material having ozone decomposition ability, for example,
Coexisting ozone is decomposed and removed to obtain a sterile and ozone-free gas, that is, sterile air. The sterilized air thus obtained is fed into the second aeration tank (18B) to remove dissolved ozone remaining in the ozonated water to obtain drinking water. When this operation is completed, the raw air supply proa (■)
, the air dryer (10+) and the ozone generator 02!I are stopped, and the on-off valves (IA) and (IB) are closed. After the contained ozone is completely decomposed and removed in the decomposer (14B), it is exhausted to the outside of the system.

On the other hand, drinking water that has been ozonated and has dissolved ozone removed is stored in a water storage mate by a pump (161).
If necessary, the on-off valve (ID) can be used for drinking. When the amount of water in the water storage tank decreases, the above method is repeated to purify drinking water.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a first aeration tank for aerating ozonized air obtained by an ozone generator into water to obtain sterilized ozonated air, and a first aeration tank for decomposing and removing coexisting ozone in the sterilized and ozonated air. After removing and sterilizing odor substances and organic matter contained in the drinking water by aerating the ozonized air obtained by the ozone decomposer and the ozone generator into the drinking water, the above sterilization is carried out. Equipped with a second aeration tank that aerates the air and removes dissolved ozone, it removes odor substances and other organic substances, prevents contamination with bacteria, and provides safe and delicious water that also removes dissolved ozone. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a drinking water purifier according to an embodiment of the present invention, and FIGS. 2 and 2 are block diagrams showing a conventional drinking water purifier, respectively. In the figure, m, (IA)-(ID) is an on-off valve, (
2) is an activated carbon packed column, (101 is an air dryer, (Kawa is a raw air supply proa, H is an oscillator/generator, θ (to) *
(18A). (18B) is the aeration tank, (14A), (14B)
The ozone decomposer % is a pump, and (II is a water tank.) In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A first aeration tank for producing sterilized ozonated air by aerating the ozonized air obtained by the ozone generator into water; ozonolysis for producing sterile air by decomposing and removing coexisting ozone in the sterilized ozonized air; After aerating the ozonized air obtained with a container and an ozone generator into drinking water to remove and sterilize odorous substances and organic matter contained in the drinking water, the sterilized air is aerated to remove dissolved ozone. Drinking water purification equipment with a second aeration tank for removal. (2) A circuit consisting of the first aeration tank and the ozone decomposer,
The drinking water purification device according to claim 1, wherein the ozone generator is provided in parallel with a circuit that directly connects the second aeration tank, and the ozone generator is shared.