JP2010194424A - Water cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cleaning apparatus which has a simple structure and can efficiently clean water. <P>SOLUTION: The water cleaning apparatus 10 is installed in a water storage tank Wt whose water surface is irradiated with sunlight. The water cleaning apparatus 10 is provided with a plurality of basket-shaped containers 21, 22 where at least their periphery is formed with a mesh having high water flowability, and a plurality of massive bodies 3 having a photocatalytic function are accumulated in the basket-shaped containers 21, 22 so as to shade their bottom from sunlight. The basket-shaped containers 21, 22 are layered in a multi-stage manner from the water surface into the water in an area where the ultraviolet rays of sunlight reach. The upper-stage basket-shaped containers 21 and the lower-stage basket-shaped containers 22 are arranged side by side in the horizontal direction so that a plurality of the massive bodies 3 are overlapped in a plane view. Algae Ag flow through the mesh of the periphery of a plurality of the basket-shaped containers 21, 22 to be decomposed and inactivated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water purification device. In particular, the present invention relates to the structure of a water purification device that purifies water stored in a water storage tank or the like.

  In power plants, mountain water and river water are stored and used as industrial water. For example, in order to suppress the growth of algae or plankton, these stored waters are killed or sterilized by injecting a chlorine-based chemical, ozone, hydrogen peroxide, or the like. Moreover, in order to purify the water of ponds and lakes, a method of killing or sterilizing by irradiating ultraviolet rays has been put into practical use.

  The former method of purifying water using a drug has the disadvantage that the cost of the drug increases and the used drug or drug compound remains in the water. The latter method of irradiating with ultraviolet rays has the disadvantage that, in addition to the necessity of an ultraviolet irradiating device, running costs such as power costs for operating the ultraviolet irradiating device and maintenance costs for the ultraviolet irradiating device are generated.

  In order to eliminate such problems, in recent years, methods for purifying water using a photocatalyst have been developed. A photocatalyst is a substance that exhibits functions such as sterilization, antibacterial, decomposition, and deodorization when exposed to light. It is known that when the surface of the photocatalyst is irradiated with light, organic substances in contact with the surface of the photocatalyst can be decomposed or inactivated by the strong oxidizing power of the substance generated thereby.

  As a substance having a photocatalytic function, titanium dioxide is often used. Titanium dioxide is used in all industrial fields because it has the advantages of absorbing the ultraviolet rays of sunlight, causing a reaction, being very safe and inexpensive, and being able to form a colorless and transparent coating.

  As a water purification device using photocatalysts, it is suitable for ponds, artificial parks in water parks, waterways, etc., has a high safety and simple structure, good water treatment efficiency, and high energy supply. A water purification device that does not require complicated maintenance is disclosed (for example, see Patent Document 1).

  The water purification apparatus according to Patent Document 1 includes a water channel having a height difference, and a pump that circulates water by sending water discharged from a lower drainage port to a high water supply port of the waterway. A group of pebbles carrying titanium oxide having a photocatalytic function on the surface is disposed at the bottom of the water channel. In the vicinity of the water channel, a light collector for reflecting and concentrating sunlight on titanium oxide is disposed. The water channel constitutes a multi-stage water channel partitioned by a water level adjusting weir. The bottom of the water channel is supplied with energy from solar cells placed near the water channel, and irradiates ultraviolet rays to the pebbles carrying titanium oxide. The black light to be installed is embedded.

  Moreover, as a water quality improvement method using a photocatalyst, a water quality improvement method that can improve and maintain the water quality of rivers, lakes, ponds, swamps, seas, etc. while maintaining a natural landscape or a clean landscape is disclosed ( For example, see Patent Document 2).

  In the water quality improvement method according to Patent Document 2, natural stones with a photocatalyst are spread from the river bank to the river bottom. In the daytime, sunlight is irradiated to the natural stone with photocatalyst in the water through the river water. For this reason, it is said that the photocatalyst which decomposes | disassembles a pollutant with the light carry | supported on the surface of the natural stone with a photocatalyst acts, and can decompose a pollutant in water. At the same time, it is said that microorganisms and algae attached to natural stones with photocatalyst can be decomposed.

JP-A-9-131588 JP 11-47742 A

  However, the water purification device according to Patent Document 1 is laid with pebbles having a photocatalytic function at the bottom of the water channel. There is a limit to the distance that ultraviolet rays reach from the water surface. When the water level increases, there is a problem that the amount of ultraviolet rays irradiated to the pebbles on the bottom of the water is reduced and the purification action by the photocatalyst cannot be exhibited.

  Moreover, the water quality purification apparatus by patent document 1 is irradiating the pebbles which a black light has a photocatalytic function through the tempered glass board laid in the water channel. Therefore, it is said that water treatment can be performed even at night or rainy weather when sunlight is not supplied.

  However, it is not easy to install the tempered glass plate and the black light in an existing water tank or the like, and there is a problem that construction costs are also generated. It is desirable to have a water purification device that can be immediately applied to an existing water tank without requiring new construction work.

  The water quality improvement method according to Patent Document 2 is the same. As described above, there is a limit to the distance that ultraviolet rays can reach from the water surface. When the water level becomes high, there is a problem that the effect of improving the water quality cannot be expected from natural stones with a photocatalyst spread on the riverbed.

  There is a need for a water purification device that can be applied to an existing water tank or the like, has a simple structure, and can efficiently purify water. The above can be said to be the subject of the present invention.

  The present invention has been made in view of such problems, and provides a water purification device that can be applied to an existing water tank, has a simple structure, and can efficiently purify water. The purpose is to do.

  The present inventor has found that these problems can be solved by providing steps in a plurality of bowl-shaped containers on which a block or net plate having a photocatalytic function is deposited, and arranging them below the surface of the water. The inventors have invented the following new water purification device.

  (1) A water purification apparatus according to the present invention is a water purification apparatus installed in a water tank in which sunlight is irradiated on the water surface, and a plurality of bowl-shaped containers having at least the periphery formed of a mesh with high flowability, and these A plurality of lumps having a photocatalytic function deposited so as to shield the bottom surface of the bowl-shaped container, and the plurality of bowl-shaped containers are directed from the water surface toward the water within a range where ultraviolet rays of sunlight reach. While being laminated in multiple stages, the upper bowl-shaped container and the lower bowl-shaped container are arranged side by side in the horizontal direction with the plurality of lumps overlapping in a plan view.

  (2) A water purification apparatus according to the present invention is a water purification apparatus installed in a water tank in which sunlight is irradiated on the water surface, and a plurality of bowl-shaped containers that form at least the periphery with a highly flowable mesh, and these A plurality of mesh plates having a photocatalytic function deposited on the bottom surface of the bowl-shaped container, and stacking the plurality of bowl-shaped containers in multiple stages from the water surface toward the water within a range where ultraviolet rays of sunlight reach At the same time, the upper bowl-shaped container and the lower bowl-shaped container partially overlap each other in a plan view and are arranged side by side in the horizontal direction.

  (3) The bowl-shaped container preferably has a photocatalytic function.

  (4) It is preferable that the plurality of mesh plates have their plate thickness surfaces extending in the horizontal direction and arranged in multiple stages in the vertical direction.

  (5) Preferably, the plurality of mesh plates are arranged in multiple rows in the horizontal direction with their plate thickness surfaces extending in the vertical direction.

  (6) It is preferable that the plurality of mesh plates have their planes inclined at a predetermined angle with respect to the bottom surface of the bowl-shaped container and arranged in multiple stages in the vertical direction.

  (7) It is preferable that the uppermost bowl-shaped container includes a buoyancy body.

  (8) It is preferable that the uppermost bowl-shaped container includes a reflecting plate that protrudes from the water surface and collects sunlight to enter the water surface.

  (9) The inner wall of the water storage tank is preferably coated with a substance having a photocatalytic function on its surface.

  The water purification apparatus according to the present invention has the advantage that it can be operated using sunlight in nature and does not require running costs such as power or medicine. The water purification apparatus according to the present invention can exhibit a purification action due to the powerful oxidation action of the photocatalyst in the generation of algae and the like.

  Moreover, since the water purification apparatus by this invention has arrange | positioned the photocatalyst in the water close | similar to the water surface where organic matter is easy to generate | occur | produce, these organic matter can be killed or sterilized efficiently. Moreover, since the reach distance of ultraviolet rays in water is shortened, the photocatalyst can be effectively operated by disposing the photocatalyst in water close to the water surface.

  Furthermore, in the water purification apparatus according to the present invention, the plurality of bowl-shaped containers substantially shade the planar area so that sunlight does not enter the bottom surface of the water storage tank. As a result, under the plurality of bowl-shaped containers, the algae becomes difficult to grow and behaves to move to the water surface in search of light. These algae are decomposed into carbon dioxide on the surface of the photocatalyst to generate a water stream that circulates around the photocatalyst.

  As described above, the water purification apparatus according to the present invention can efficiently decompose or inactivate algae by utilizing the properties of algae. In addition, the growth of algae can be suppressed by shielding light from below the plurality of bowl-shaped containers.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the structure of the water purification apparatus by 1st Embodiment of this invention, and has shown the water tank in the longitudinal cross-section. It is a top view which shows the structure of the water purification apparatus by the said 1st Embodiment. It is a front view which shows the structure of the water purification apparatus by 2nd Embodiment of this invention, and has shown the water tank in the longitudinal cross-section.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
Initially, the structure of the water purification apparatus by 1st Embodiment of this invention is demonstrated. FIG. 1 is a front view showing a configuration of a water purification device according to a first embodiment of the present invention, and shows a water storage tank in a longitudinal section. FIG. 2 is a plan view showing the configuration of the water purification device according to the first embodiment.

  Referring to FIG. 1 or FIG. 2, the water purification device 10 according to the first embodiment of the present invention is installed in a water tank Wt in which sunlight R is irradiated on the water surface Sf. In the first embodiment shown in FIG. 2, the water purification devices 10 are installed in two rows in the water storage tank Wt. The water purification devices 10 are arranged in a single row corresponding to the planar area of the water purification device 10. Or three or more rows, and any sequence is included in the scope of the present invention.

  Referring to FIG. 1 or FIG. 2, the water purification device 10 includes a plurality of bowl-shaped containers 21 arranged in the upper stage and a plurality of bowl-shaped containers 22 arranged in the lower stage. These bowl-shaped containers 21 and 22 are formed by a mesh having high flowability at the periphery (side surface) and the bottom surface. These bowl-shaped containers 21 and 22 are coated on the entire surface with a fine powder photocatalyst and have a photocatalytic function.

  In addition, the net | network with high flowability means having a distribution port of the grade which algae, plankton, etc. distribute | circulate, but the distribution | circulation of the block 3 mentioned later is blocked | prevented. By forming the periphery (side surface) and bottom surface of these bowl-shaped containers 21 and 22 with a network having high flowability, clogging due to algae and plankton can be prevented.

  Referring to FIG. 1 or FIG. 2, a plurality of lumps 3 having a photocatalytic function are accommodated in the bowl-shaped containers 21 and 22. These lumps 3 are deposited so as to shield the bottom surfaces of the bowl-shaped containers 21 and 22. Note that these lumps 3 may be formed of irregular clusters, or may be formed of round and small granules, and the form of the lumps 3 includes the form of granules.

  As the photocatalyst supported on the mass 3, titanium oxide, tungsten oxide, or the like may be used. By increasing the surface area of the mass 3, the water purification action can be improved. The lump 3 may be composed entirely of a photocatalytic component, and the lump 3 as a carrier for supporting the photocatalyst may be a metal, ceramic or synthetic resin. Moreover, you may coat a photocatalyst on the surface of the block 3 which consists of one of these base materials.

  Referring to FIG. 1 or FIG. 2, the plurality of upper bowl-shaped containers 21 are arranged side by side in the horizontal direction with a predetermined interval. Similarly, the plurality of lower bowl-shaped containers 22 are arranged in parallel in the horizontal direction with a predetermined interval. Note that the side-by-side arrangement means that they are arranged apart from each other and aligned in a line.

  Referring to FIG. 1 or FIG. 2, the upper bowl-shaped containers 21 and 21 on the upper stage form a gap, and the lower bowl-shaped containers 22 are stacked so as to close the gap. For example, the bowl-shaped container 21 and the bowl-shaped container 22 may be coupled to each other with a string or a wire. And the upper bowl-shaped container 21 and the lower bowl-shaped container 22 are laminated | stacked toward the water from the water surface Sf in the range which the ultraviolet-ray of sunlight R reaches | attains.

  Moreover, referring to FIG. 1 or FIG. 2, the bowl-shaped container 21 and the bowl-shaped container 22 are arranged such that a plurality of masses 3 deposited on them overlap in a plan view. Therefore, the lower side of these bowl-shaped containers 21 and 22 is shielded from light.

  Referring to FIG. 1 or FIG. 2, the upper bowl-shaped container 21 has a pair of buoyancy bodies 21f and 21f fixed to both wings thereof. The buoyancy body 21f may be a hollow cylindrical float with both ends sealed, or may be a rod-shaped eaves member formed of foamed resin, and can impart a predetermined buoyancy to the water purification device 10.

  Referring to FIG. 1 or FIG. 2, the upper bowl-shaped container 21 includes a reflecting plate 21r with a part of the side surface protruding. The reflector 21r protrudes from the water surface Sf, collects sunlight R, and makes it incident on the water surface Sf.

  Next, the operation of the water purification device 10 according to the first embodiment of the present invention will be described.

  The water purification apparatus 10 according to the first embodiment of the present invention uses a combination of behavior (behavior) by photosynthesis in water such as algae and a decomposition function by a photocatalyst.

  Referring to FIG. 1, the distance L1 from the water surface Sf to the bottom surface of the bowl-shaped container 21 is set to a range of about 5 cm to 10 cm (L1 = 5 to 10 cm). Further, the distance L2 from the water surface Sf to the bottom surface of the bowl-shaped container 22 is set in a range of about 10 cm to 20 cm (L1 = 10 to 20 cm).

  In general, algae and the like have a habit of breeding near the water surface where sunlight can easily reach. Moreover, the ultraviolet ray of sunlight has a short reach in water. The distance in water where the amount of ultraviolet rays becomes 1/10 is about 3 m for distilled water, 10 to 20 cm for tap water, and about 5 cm for seawater.

  In the water purification apparatus 10 according to the first embodiment of the present invention, algae and the like are easily proliferated and the photocatalyst is arranged near the water surface where the amount of ultraviolet rays of sunlight is large. There is an advantage that it can be suppressed.

  Referring to FIG. 1, the water purification apparatus 10 according to the first embodiment of the present invention arranges a plurality of bowl-shaped containers 21, 22 so that sunlight R does not enter below the plurality of bowl-shaped containers 21, 22. is doing. As a result, under the plurality of bowl-shaped containers 21 and 22, the algae becomes difficult to grow and behaves to move to the water surface in search of light. The broken-line arrows shown in FIG. 1 indicate the movement path that becomes the behavior of the algae Ag.

  Also, referring to FIG. 1, these algae Ag are decomposed on the surface of the photocatalyst (the surface of the lump 3) through the mesh of the cage containers 21 and 22. And in the circumference | surroundings of a photocatalyst, the water flow which moves to a horizontal direction is generated after the carbon dioxide gas generated by decomposition | disassembly of algae Ag rises. As described above, the water purification device 10 according to the first embodiment of the present invention has an effect that the algae can be efficiently decomposed or inactivated using the properties of the algae.

  Further, referring to FIG. 1 or FIG. 2, in the water purification device 10 according to the first embodiment of the present invention, since the plurality of bowl-shaped containers 21 are provided with buoyant bodies 21f, the water level of the water tank Wt changes. In addition, the set value from the water surface Sf to the bottom surfaces of the bowl-shaped containers 21 and 22 can be maintained.

  Referring to FIG. 1 or FIG. 2, in the water purification device 10 according to the first embodiment of the present invention, the bowl-shaped container 21 protrudes from the water surface Sf and condenses the sunlight R to enter the water surface. Since the reflecting plate 21r is provided, the sunlight R can be collected efficiently.

  In order to further enhance the effect of the water purification device 10 according to the first embodiment of the present invention described above, the surface of the inner wall of the water storage tank Wt is preferably coated with a substance having a photocatalytic function. Further, the surface of the bowl-shaped containers 21 and 22 may be coated with a substance having a photocatalytic function.

  The water purification apparatus according to the present invention has the advantage that it can be operated using sunlight in nature and does not require running costs such as power or medicine. The water purification apparatus according to the present invention can exhibit a purification action due to the powerful oxidation action of the photocatalyst in the generation of algae and the like.

[Second Embodiment]
Next, the structure of the water purification apparatus by 2nd Embodiment of this invention is demonstrated. FIG. 3 is a front view showing the configuration of the water purification device according to the second embodiment of the present invention, and shows the water storage tank in a longitudinal section.

  In the following description, components having the same reference numerals as those used in the description of the first embodiment have the same operation, and thus the description thereof may be omitted. Here, the water purification apparatus 100 according to the second embodiment of the present invention replaces the block 3 contained in the bowl-shaped containers 21 and 22 with the net plate 4. Moreover, the water purification apparatus 100 according to the second embodiment of the present invention shields the bottom surfaces of the bowl-shaped containers 21 and 22 from light.

  Referring to FIG. 3, the water purification device 100 includes a plurality of bowl-shaped containers 21 arranged in the upper stage and a plurality of bowl-shaped containers 22 arranged in the lower stage. These bowl-shaped containers 21 and 22 are formed with a mesh with high flowability on the periphery (side surfaces).

  Referring to FIG. 3, a plurality of mesh plates 4 having a photocatalytic function are accommodated in the bowl-shaped containers 21 and 22. These mesh plates 4 are deposited so as to shield the bottom surfaces of the bowl-shaped containers 21 and 22.

  In FIG. 3, the mesh formed on the mesh plate 4 is preferably open to the extent that algae, plankton, etc. circulate. The plurality of mesh plates 4 shown in FIG. 3 are randomly inclined and arranged. However, the plurality of mesh plates 4 may be arranged in multiple stages in the vertical direction with their plate thickness surfaces extending in the horizontal direction. The plurality of mesh plates 4 may be arranged in multiple rows in the horizontal direction with their plate thickness surfaces extending in the vertical direction. Further, the plurality of mesh plates 4 may be arranged in multiple stages in the vertical direction with their planes inclined at a predetermined angle with respect to the bottom surfaces of the bowl-shaped containers 21 and 22. And it is preferable that algae, plankton, etc. distribute | circulate these arrangement | positioning.

  As the photocatalyst carried on the mesh plate 4, titanium oxide, tungsten oxide or the like is used. The net plate 4 may be composed entirely of a photocatalytic component, and the net plate 4 as a carrier for supporting the photocatalyst may be a metal, ceramic or synthetic resin. Moreover, you may coat the photocatalyst on the surface of the mesh board 4 which consists of one of these base materials.

  Referring to FIG. 3, the plurality of bowl-shaped containers 21 in the upper stage are arranged side by side in the horizontal direction with a predetermined interval. Similarly, the plurality of lower bowl-shaped containers 22 are arranged in parallel in the horizontal direction with a predetermined interval.

  Referring to FIG. 3, the upper bowl-shaped containers 21, 21 adjacent to each other form a gap, and the lower bowl-shaped containers 22 are stacked so as to close the gap. For example, the bowl-shaped container 21 and the bowl-shaped container 22 may be coupled to each other with a string or a wire. And the upper bowl-shaped container 21 and the lower bowl-shaped container 22 are laminated | stacked toward the water from the water surface Sf in the range which the ultraviolet-ray of sunlight R reaches | attains.

  Referring to FIG. 3, the bowl-shaped container 21 and the bowl-shaped container 22 are arranged side by side in the horizontal direction so as to partially overlap in a plan view. Therefore, the lower side of these bowl-shaped containers 21 and 22 is shielded from light.

  Next, the operation of the water purification device 100 according to the second embodiment of the present invention will be described.

  Referring to FIG. 3, the water purification apparatus 100 according to the second embodiment of the present invention arranges a plurality of bowl-shaped containers 21, 22 so that sunlight R does not enter below the plurality of bowl-shaped containers 21, 22. is doing. As a result, under the plurality of bowl-shaped containers 21 and 22, the algae becomes difficult to grow and behaves to move to the water surface in search of light. The broken-line arrows shown in FIG. 3 indicate the movement path that becomes the behavior of the algae Ag.

  Referring to FIG. 3, the algae Ag is decomposed on the surface of the photocatalyst (the surface of the mesh plate 4) through the mesh of the cage containers 21 and 22. And in the circumference | surroundings of a photocatalyst, the water flow which moves to a horizontal direction is generated after the carbon dioxide gas generated by decomposition | disassembly of algae Ag rises. As described above, the water purification device 100 according to the second embodiment of the present invention has an effect that the algae can be efficiently decomposed or inactivated using the properties of the algae.

  The water purification apparatus according to the embodiment of the present invention has an advantage that it can be installed immediately in an existing water tank or the like. The water purification apparatus according to the embodiment of the present invention uses a photocatalyst and sunlight, and also purifies water by using algae habits. In particular, the water purification apparatus according to the embodiment of the present invention is suitable for water treatment at the early stage of algae growth.

  Moreover, the water purification apparatus according to the embodiment of the present invention can always maintain the initial state without algae adhering to the surface of the photocatalyst. Therefore, the water purification apparatus according to the embodiment of the present invention can require only initial investment with little maintenance throughout the year.

  Since the water purification apparatus according to the embodiment of the present invention can be provided at low cost if titanium dioxide is used as a photocatalyst, it is expected to be used not only for the purification of water storage tanks but also for every environment.

3 lump 10 water purification device 21 bowl-shaped container (upper bowl-shaped container)
22 bowl-shaped container (bottom bowl-shaped container)
Wt water tank

Claims (9)

A water purification device installed in a water tank in which sunlight is irradiated on the water surface,
A plurality of bowl-shaped containers forming at least the periphery with a network having high flowability;
A plurality of lumps having a photocatalytic function deposited so as to shield the bottom surface of these bowl-shaped containers,
In a range where the ultraviolet rays of sunlight reach, the plurality of bowl-shaped containers are stacked in multiple stages from the water surface toward the water, and the upper bowl-shaped container and the lower bowl-shaped container are the plurality of bowl-shaped containers. A water purification apparatus in which massive bodies overlap in a plan view and are arranged side by side in the horizontal direction. A water purification device installed in a water tank in which sunlight is irradiated on the water surface,
A plurality of bowl-shaped containers forming at least the periphery with a network having high flowability;
A plurality of mesh plates having a photocatalytic function deposited on the bottom surface of these bowl-shaped containers,
The plurality of bowl-shaped containers are stacked in multiple stages from the water surface to the water within the range where the ultraviolet rays of sunlight reach, and the upper bowl-shaped container and the lower bowl-shaped container are partially in plan view. Water purification device that is placed side by side in the horizontal direction.   The water purification apparatus according to claim 1 or 2, wherein the bowl-shaped container has a photocatalytic function.   The water purification apparatus according to claim 2, wherein the plurality of mesh plates have their plate thickness surfaces extending in the horizontal direction and arranged in multiple stages in the vertical direction.   The water purification apparatus according to claim 2, wherein the plurality of mesh plates have their plate thickness surfaces extending in the vertical direction and arranged in multiple rows in the horizontal direction.   3. The water purification apparatus according to claim 2, wherein the plurality of mesh plates have their planes inclined at a predetermined angle with respect to the bottom surface of the bowl-shaped container and arranged in multiple stages in the vertical direction.   The water purification apparatus according to any one of claims 1 to 6, wherein the uppermost bowl-shaped container includes a buoyant body.   The water purification apparatus according to any one of claims 1 to 7, wherein the uppermost bowl-shaped container includes a reflector that projects from the water surface and collects sunlight to enter the water surface.   The water purification apparatus according to any one of claims 1 to 8, wherein an inner wall of the water storage tank has a surface coated with a substance having a photocatalytic function.

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