JPH10272462A - Circulation water cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To physically, chemically and efficiently sterilize and clean water safely to a human body and a breeding living thing by acquiring sufficient energy from a U.V. lamp and activating a photocatalyst in water. SOLUTION: When water flows from a circulation water inlet 10 into a space C in a device, catalyst activity is urged by U.V. rays irradiated from a U.V. lamp L1 to a wall surface A2 in which a photocatalyst is mixed or coated and organic matters and inorganic nitrogen oxides, etc., contained in the circulation water are directly or indirectly made into lower molecules, Also living things such as microorganisms or algae can be sterilized with a substance generated with a catalytic reaction, e.g. active oxygen and U.V. rays. Also by making the surface where the photocatalyst is mixed into a porous structure and by absorbing or ion-exchanging organic matters or harmful ions, e.g. suspended matters and ammonia, etc., the residence time can be prolonged to that they are surely decomposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

This invention relates to the field of circulating water treatment.

[0002]

2. Description of the Related Art In a conventional circulation type purifying apparatus, there is an oxidizing type apparatus by inputting ozone.

[0003] Recently, an aquarium or the like has an oxidizer for generating free chlorine by electrolysis.

[0004] There is an apparatus for sterilizing using an ultraviolet sterilizing lamp.

[0005] There is a so-called water activator for introducing titanium oxide or tourmaline into water.

There are antibacterial products using silver and copper.

[0007]

In the case of oxidation due to the generation of ozone or chlorine, an incorrect dose in water is harmful when rearing a living body and adversely affects the living body. In addition, when the administered ozone or chlorine is diffused into the air, it harms the human body and its surroundings.

In the case of an ultraviolet germicidal lamp, although sterilization and improvement in transparency are recognized to some extent, chemical oxidization and the like are not performed, and the efficiency is low.

[0009] Even if a product carrying or blending titanium oxide or tourmaline is put into an indoor aquarium fish tank, a sufficient effect cannot be obtained.

[0010] Antibacterial products using silver or copper have an adverse effect on the living body with respect to the adjustment of the elution amount and the residual, and if they are intended to have sufficient antibacterial properties and algae dying, aquatic plants die with high sensitivity. Often leads to.

[0011]

DISCLOSURE OF THE INVENTION The circulating water purifying apparatus according to the present invention has been invented in view of the problems of the prior art, and is capable of physically and chemically efficiently disinfecting and purifying human bodies and breeding organisms safely. The purpose is to do.

[0012]

In order to achieve the above object, in the circulating water purifying apparatus according to the present invention, sufficient energy is obtained from an ultraviolet lamp to activate a photocatalyst in water.

[0013]

With the above construction, the photocatalyst is activated to directly or indirectly cause a physical or chemical reaction to efficiently and safely sterilize and purify circulating water.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a circulating water purification apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of a circulating water purification device according to the present invention. 10
At the inlet of the circulating water, water flows into the space C in the apparatus. At this time, the ultraviolet light emitted from the ultraviolet lamp L1 on the wall A2 on which the photocatalyst is mixed or applied promotes the catalytic activity, and organic or inorganic nitrogen oxides contained in the circulating water are directly or indirectly reduced in molecular weight.

In addition, organisms such as microorganisms and algae can be sterilized by substances generated by the catalytic reaction, such as active oxygen and ultraviolet rays.

FIG. 2 is a cross-sectional view showing one embodiment of the circulating water purification device. The activity can be increased by increasing the surface area of A2 so that the photocatalyst is efficiently irradiated with ultraviolet rays.

Further, by making the surface on which the photocatalyst is mixed have a porous structure, the staying time can be extended physically or chemically by adsorbing or ion-exchanging organic substances and harmful ions such as suspensions and ammonium. Can be. As a result, the decomposition can be further ensured.

In order to form a porous structure, the photocatalyst can be mixed and formed with minerals such as diatomaceous earth and sepiolite, or can be mixed and formed with activated carbon and the like. A resin can be used for these moldings, and baking can be performed.

The photocatalyst can be mixed with the resin and applied to the inner surface of A1 or sprayed to form A2.

FIG. 3 shows an embodiment of the circulating water purifying apparatus for rearing ornamental fish. In the present invention, aquarium water overflows from I, is filtered by filter A, and returns to the aquarium via pump P. A bypass was provided after the pump P, and the device of the present invention was added.

As the amount of water passed through the circulating water purifier becomes larger, it becomes more difficult to achieve the object. Therefore, a valve V was provided and adjusted to supply an appropriate amount of water.

There is an aquarium for aquarium fish having a water volume of about 50 L. The apparatus shown in FIG. 3 was provided in this water tank, circulated by a pump having a flow rate of about 10 L / min, and about 1 L of a ceramic filter medium obtained by firing diatomaceous earth and an appropriate amount of polypropylene wool were used for the filtration layer. And a diatomaceous earth pipe containing about 3 g of titanium oxide was designated as A2. At that time, the thickness of the diatomaceous earth pipe was about 3 mm, and the apparent surface area irradiated with ultraviolet rays was about 250 cm ² formed by a structure like A2 in FIG. The valve V was adjusted so that flowing water of about 1 L / min flowed into the tank.

In the water quality adjusting tank H, the water temperature was adjusted to 25 ° C. by a heater.

A water tank was prepared in the same 50 L water tank as in the above without using a bypass and using the present invention.

In the same 50 L water tank, a water tank similar to the above but without using the bypass and not using the present invention was prepared, and a 3 mm thick surface area of about 250 c containing about 3 g of titanium oxide was provided on the bottom of the water tank.
Approximately ²⁰ m2 of fluorescent light for ornamental fish (N
EC Violx) was placed on the upper surface of the water tank.

50 L of tap water neutralized with chlorine was introduced into the above-mentioned water tanks, circulated and allowed to stand for 1 day, and 1 g of peptone was administered to each water tank.

On the second day after administration, the amounts of ammonia, nitrous acid and nitric acid in each water tank did not change, and after one week, the amount of ammonia was 0.1 ppm or less and the amount of nitrous acid was 0.5 ppm.
On the other hand, in the case of 0.8 ppm and 1.3 ppm, and in the case of 0.6 ppm and 1.5 ppm. At this point, the transparency was high, but suspension was observed in.

When valve V was closed and all the water passed through the invention, no noticeable difference was noted as described above.

There are three breeding aquariums having a capacity of 50 liters which have been continuously breeding ornamental fish for over one year. This tank is filled with natural driftwood and has a slight chromaticity like coffee. Unless about 1/3 of the water is replaced in one week, the pH may drop to 5 or less due to accumulation of corrosive substances.

The circulating water purification device of the present invention was added to one of these water tanks, and the amount of passing water was adjusted to about 1 L / min.

One week later, the chromaticity of the water tank to which the present invention was added became transparent and the pH dropped to about 5 for the others, but the added water tank was about 6.5.

In addition, in the general bacteria group before addition (cultured at 28 ° C. for 48 hours at ordinary agar medium manufactured by Nissui Co., Ltd.), all three water tanks had 10
⁴ cfu / g order but additional water tank only 10 ² cf
It decreased to the order of u / g.

The longer the residence time of the water in the reaction layer C, the more the sterilization and purification proceed. For example, it is effective for stopping water such as water retained in a water purifier.

Pre-treatment with a pre-filter or the like according to the amount of treated water and the degree of contamination of water makes it possible to purify water more efficiently.

The output of the ultraviolet lamp, the amount of the photocatalyst used, and the ultraviolet radiation surface area can be adjusted depending on the amount of treated water and the degree of contamination of the water.

The performance of the UV lamp or the photocatalyst mixed or coated surface A2 is deteriorated due to its life or contamination. Based on these facts, it is possible to make exchange possible.

As the ultraviolet lamp, any lamp having a wavelength that activates the photocatalyst can be used in any form.

It is also possible to arrange a photocatalyst in a glass tube on the surface of the ultraviolet lamp.

The photocatalyst can be used in any form as long as it can use the energy received from the ultraviolet lamp by contacting the treated water.

[0040]

As described above, according to the circulating water purifying apparatus according to the present invention, physical and chemical reactions are actively performed, and the water quality is successfully purified.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment according to the present invention.

FIG. 2 is a sectional view showing an embodiment according to the present invention.

FIG. 3 is a diagram showing one embodiment according to the present invention.

[Explanation of symbols]

 10 Water intake port 11 Drain port A2 Photocatalyst S Circulating water purification device T Ornamental fish breeding aquarium H Water quality preparation tank

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 16, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (2)

[Claims] 1. An apparatus for purifying circulating water, wherein an ultraviolet lamp and a photocatalyst disposed in treated water use the energy of the ultraviolet lamp in the field of purifying circulating water. 2. The photocatalyst is irradiated with ultraviolet rays, and the catalyst is activated to directly or indirectly cause a physical or chemical reaction such as a decomposition reaction, an oxidation reaction, or an agglomeration reaction to perform sterilization and water purification. The circulating water purification device according to claim 1. [0001]