JP2020185515A - Water treatment method using irradiation module, water tank arranged with irradiation module, and irradiation module for liquid disinfection - Google Patents

Abstract

To provide a water treatment method capable of disinfection of water to be treated by using a simple apparatus.SOLUTION: The invention provides a water treatment method for irradiating water to be treated in a water tank with radiation. The problem is solved by the water treatment method wherein a radiation irradiation module including a radiation source, an electric power source for supplying an electricity to the radiation source, and a case where the radiation source and the electric power source are stored are installed at an arbitrary position in the water to be treated in the water tank, and the water to be treated is irradiated with a radiation emitted from the radiation irradiation module.SELECTED DRAWING: Figure 2

Description

The present invention relates to a water treatment method using a radiation module, a water tank in which the radiation module is arranged, and a radiation module for liquid sterilization.

As a method for sterilizing the water to be treated stored in the water tank, the liquid tank sterilizer described in Patent Document 1 has been proposed. Specifically, a liquid tank composed of a sterilization line irradiation unit arranged in the liquid in the liquid tank and a floating member connected to the sterilization line irradiation unit and floating on the liquid to support the sterilization line irradiation unit. An internal sterilizer is disclosed. In this liquid tank sterilization device, the floating member moves up and down according to the increase and decrease of the liquid in the liquid tank, so that the connected sterilization line irradiation unit is always present in the liquid.

Japanese Unexamined Patent Publication No. 9-75429

In the liquid tank sterilization device described in Patent Document 1, since the sterilization irradiation unit that irradiates ultraviolet rays is attached to a slider member that can move in the vertical direction, the sterilization irradiation unit moves only in the vertical direction within a specific range. , Cannot move left and right and back and forth. Therefore, the ultraviolet irradiation for sterilization becomes non-uniform on the inner wall of the tank and the water stored in the tank. As a result, there is a problem that the tank is likely to be deteriorated in the place where the ultraviolet rays are excessively irradiated on the inner wall of the tank, while the liquid stored in the tank is insufficiently sterilized in the place where the amount of the ultraviolet rays is insufficient.

Further, since an external power source for supplying electric power to the sterilization irradiation unit is prepared and the electric power is obtained from the external power source, the equipment becomes complicated due to wiring or the like. Therefore, the maintainability is poor, and the work becomes difficult even when newly installing.
The present invention has been made under such circumstances, and an object of the present invention is to provide a water treatment method capable of sterilizing water to be treated by a simple device.

The present inventors have proceeded with development to solve the above problems, and can solve the above problems by using a radiation irradiation module in which a power source and a radiation light source connected to the power source are housed in a case for water treatment. And completed the invention. The present invention includes the following.

[1] A water treatment method for water to be treated in a water tank.
A step of preparing a radiation irradiation module including a radiation source, a power source for supplying electricity to the radiation source, and a case containing the radiation source and the power source.
A water treatment method including a step of installing the radiation irradiation module so that it can be located at an arbitrary place in the water to be treated in a water tank, and a step of irradiating the water to be treated with radiation emitted from the radiation irradiation module.
[2] The water treatment method according to [1], wherein the radiation is ultraviolet rays.
[3] The water treatment method according to [1] or [2], comprising a module activation step of supplying electricity from the power source to the radiation source and causing the radiation irradiation module to emit radiation.
[4] The water treatment method according to any one of [1] to [3], which comprises a recovery step of taking out the radiation irradiation module installed in the water tank from the water tank.
[5] The water treatment method according to [4], wherein the water tank is provided with a radiation source confirmation means and / or a water quality confirmation means, and the confirmation means determines the implementation time of the recovery step.
[6] A water tank that stores water to be treated.
A radiation irradiation module including a radiation source, a power source for supplying electricity to the radiation source, and a case for storing the radiation source and the power source is arranged in the water to be treated.
The irradiation module is a water tank arranged so that it can be located at an arbitrary location in a predetermined area of the water to be treated in the water tank.
[7] The water tank according to [6], wherein a plurality of radiation irradiation modules are arranged in the water to be treated, and the plurality of radiation irradiation modules are connected to each other.
[8] The water tank according to [6] or [7], wherein the specific gravity of the water to be treated and the specific gravity of the irradiation module are substantially the same.
[9] A radiation irradiation module for liquid sterilization, which includes a radiation source, a power source for supplying electricity to the radiation source, and a case containing the radiation source and the power source.
[10] The radiation irradiation module for liquid sterilization according to [9], wherein the radiation sources are housed in a plurality of cases.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a water treatment method capable of sterilizing water to be treated as a whole and uniformly in a water tank by a simple device.

It is a flowchart explaining the water treatment step using an ultraviolet irradiation module. It is a perspective view which conceptually shows one form of an ultraviolet irradiation module. It is a perspective view which conceptually shows one form of a water tank in which an ultraviolet irradiation module is arranged.

Hereinafter, the present invention will be described in detail, but the description of the constituent elements described below is an example (representative example) of the embodiment of the present invention, and the present invention is not limited to these contents. It can be implemented with various modifications within the scope of the abstract.
One embodiment of the present invention is, for example, a water treatment method shown by a treatment flow as shown in FIG.

FIG. 1 can be divided into an initial installation stage, which is a flow from installing the radiation irradiation module to the water to be treated and starting water treatment, and a post-operation stage, which is a flow after starting water treatment.
The initial stage is a module activation step in which electricity is supplied from a power source to a radiation source from a state in which treated water is stored in a water tank (stat) so that the radiation irradiation module emits radiation; and activated radiation irradiation. It is carried out through an installation step of installing the module in the water to be treated in the water tank.

From the second time onward, the stage is a step of monitoring the water quality of the water to be treated by the radiation source confirmation means and / or the water quality confirmation means, and if it is determined that the water quality has deteriorated in the step, the water treatment is stopped, and the above. It includes a recovery step of removing the irradiation module installed in the water tank from the water tank.
Further, when the recovery step is completed, a recharge (installation) step may be provided in which the new irradiation module is installed in the water in the water tank. In the re-injection (installation) step, a new irradiation module may be prepared, or the recovered battery of the irradiation module may be replaced to reuse the irradiation module.
When the replacement / cleaning step is completed, water treatment is started again.

The radiation is not limited as long as it can be used for sterilization. In general, radiation includes ionizing radiation and non-ionizing radiation. Considering that radiation has a function of cleaving a gene (DNA), non-ionizing radiation is preferable. Examples of non-ionizing radiation include radio waves, microwaves, infrared rays, visible rays, and ultraviolet rays, but ultraviolet rays are preferable because the module can be easily miniaturized and can be sterilized for general purposes.

FIG. 2 shows one form of an ultraviolet module, which is an irradiation module used in the water treatment method of the present embodiment. The ultraviolet module 10 shown in FIG. 2 has a configuration in which a power source 11 and an ultraviolet light source 12 connected to the power source 11 are housed in a case 13. Since the ultraviolet module 10 can irradiate ultraviolet rays from the ultraviolet light source 12 toward the outside, it can be used for sterilizing the water to be treated. The ultraviolet module 10 may have a configuration other than these.

The power source 11 may be any as long as it can supply electric power to the ultraviolet light source 12, and is typically a battery, but is not limited thereto. From the viewpoint of space saving and the like, a button battery is preferable. In the present embodiment, since the power supply 11 is stored in the ultraviolet module 10, it is not necessary to connect the ultraviolet module 10 and the external power source. Therefore, it is not necessary to prepare external wiring for power supply, it is easy to install the ultraviolet module 10 in the water tank, and maintenance is also easy.

The ultraviolet light source 12 is electrically connected to the power source 11 to supply electric power from the power source 11 and irradiate the ultraviolet rays toward the outside of the ultraviolet module 10. The ultraviolet light source 12 is not particularly limited as long as it can irradiate ultraviolet rays, but it is preferable to use an ultraviolet light emitting LED from the viewpoint of power consumption.

The power supply 11 and the ultraviolet light source 12 are arranged or stored in the case 13. Since the ultraviolet module 10 is installed in water in the present embodiment, it is required to have waterproofness so that the power source and the ultraviolet light source do not come into contact with water.
Since the case 13 is installed underwater, it is waterproof.
Variations in the structure of the ultraviolet module 10 include, for example, the following. Structure 1: The power supply 11 and the ultraviolet light source 12 are stored in a waterproof capsule-shaped case 13. Structure 2: The power supply 11 and the ultraviolet light source 12 are stored in a non-waterproof container, and the surface of the container is Structural structure protected by a waterproof sheet 3: A structure in which the power supply 11 is stored in a container, an ultraviolet light source 12 is arranged on the surface of the container, and the surface is protected by a waterproof sheet. Maintenance is easy and durability is high. Structure 1 is preferable in terms of height.

The ultraviolet module 10 is an ultraviolet module for sterilizing water to be treated. Examples of the water to be treated include groundwater, river water, factory effluent and the like.
The number of power sources and the number of ultraviolet light sources included in the ultraviolet module 10 are not particularly limited. From the viewpoint of uniformly irradiating ultraviolet rays from the ultraviolet module, there may be a plurality of ultraviolet light sources 12.
The location of the power supply and the ultraviolet light source in the ultraviolet module 10 is not particularly limited, but from the viewpoint of uniformly irradiating the ultraviolet from the ultraviolet module, for example, when the case is a polyhedron, the ultraviolet light source is such that the ultraviolet is emitted from each surface. When the case is a sphere, an ultraviolet light source may be arranged so that when the sphere is separated into two hemispheres, ultraviolet rays are emitted from the outer peripheral surface forming each hemisphere. .. Further, when a plurality of ultraviolet light sources are arranged, the intervals between the respective ultraviolet light sources may be substantially the same or may be at random.
The effect of sterilization by ultraviolet rays varies depending on the type of bacteria and habitat conditions, but is preferably 200 to 310 nm, more preferably 220 to 280 nm, and particularly preferably 250 to 260 nm.
The bactericidal effect of ultraviolet rays depends on the bacterial species, temperature, humidity, and other conditions.

In the case 13, when the ultraviolet light source is stored, it is necessary to use an ultraviolet transmitting material at least in a place where ultraviolet rays are emitted. On the other hand, when the ultraviolet light source is arranged on the surface of the case, the case 13 does not have to be an ultraviolet transmitting material, but in that case, a waterproof sheet for ensuring waterproofness is required, and the waterproof sheet is ultraviolet. It is preferably a transparent material. The case 13 is typically made of glass, resin, or the like, but is not limited thereto. Further, the waterproof sheet is typically formed of a resin material having ultraviolet light transmittance such as vinyl, but is not limited thereto.

The size of the ultraviolet module 10 can be appropriately set depending on the situation in which the ultraviolet module is used. That is, it can be appropriately set according to the size of the treatment tank or the water storage tank in which the water to be treated is stored.

The shape of the ultraviolet module 10 is not particularly limited, and may be a cube, a rectangular parallelepiped, a polyhedron, a cylinder, a cone, a sphere (including a substantially sphere), a spheroid, or the like.
In the case of a polyhedron, it is preferable that the angle formed by the adjacent surfaces in the ultraviolet module is as close to 180 ° as possible from the viewpoint that the angle formed by the polyhedron does not damage the wall of the water tank. On the other hand, in the case of a sphere, when ultraviolet rays are emitted from the case, they are easily reflected by the curved surface of the case, so that the amount of ultraviolet rays emitted from the case is reduced, which may affect the bactericidal effect. Considering the above two points, a polyhedron close to a sphere is preferable.

The size of the ultraviolet module 10 is not particularly limited. For example, when the ultraviolet module is a cube, one side may be usually 2 cm or more and 3 cm or more, and usually 10 cm or less and 5 cm or less. You can. Further, for example, when the ultraviolet module is a sphere (including a polyhedron close to a sphere), its diameter (major diameter in the case of a substantially sphere, the same applies to a polyhedron close to a sphere) is usually 2 cm or more, and 3 cm or more. It may be present, and is usually 10 cm or less, and may be 5 cm or less.

The ultraviolet transmittance of the case 13 depends on the material, shape, size, element arrangement, etc. of the module, but the transmittance of the above wavelength measured according to JIS K7375: 2008 is usually 60% or more, preferably 80. % Or more, more preferably 90% or more, still more preferably 95% or more, and usually 100% or less. The higher the UV transmittance, the more preferable.

In this embodiment, the ultraviolet module is installed in the water in the aquarium. FIG. 3 shows a form in which the ultraviolet modules 10 are installed in a plurality of water tanks.
The water tank 20 may be a container that can hold the water to be treated, and examples thereof include a raw water tank, a water receiving tank (water storage tank), and a wastewater water storage tank, but the water tank 20 is not limited thereto.

The material of the water tank 20 is not particularly limited, and may be made of metal such as stainless steel, resin such as FRP, or glass.
The size of the water tank 20 is not particularly limited, and is appropriately selected depending on the amount of water to be treated. The shape of the water tank is not particularly limited, and may be a cube, a rectangular parallelepiped, a polyhedron such as a triangular pyramid, a cylinder, a cone, a sphere (including a substantially sphere), a spheroid, or the like.
The water tank 20 may be provided with an inflow port 21 and an outflow port 22 of the water to be treated, and may be provided with a lid 23. The positions of the inflow port 21 and the outflow port 22 in the water tank are also not particularly limited.

The water tank 20 may be provided with a light source confirmation means and / or a water quality confirmation means (not shown).
The light source confirmation means may be able to confirm from the outside of the water tank 20 whether or not the ultraviolet module 10 installed in the water in the water tank continues to irradiate ultraviolet rays, and when the water tank is made of a non-transparent material, it is sufficient. By making a part of the water tank a window frame made of transparent material, it is possible to confirm the irradiation of ultraviolet rays from the outside. In addition, by installing an ultraviolet sensor in the water tank, it is possible to remotely check whether or not the ultraviolet module continues to irradiate ultraviolet rays.

If the UV irradiation could not be confirmed by the light source confirmation means, it is considered that the power supply of the power supply in the UV module was reduced and the UV light was not radiated, or the UV light source stopped irradiating the UV light due to some trouble. , Judge that it is time to carry out the above-mentioned recovery step, and carry out the recovery step.

As the water quality checking means, it suffices if the water quality of the water in the water tank can be confirmed from the outside of the water tank. For example, a water quality measuring sensor for measuring the water quality may be installed inside the water tank. If it can be confirmed that the water quality of the water in the aquarium has deteriorated, it is said that the power supply of the power supply in the ultraviolet module has decreased and the ultraviolet light is no longer emitted, or the ultraviolet light source has stopped irradiating the ultraviolet light due to some failure. It is conceivable to carry out the recovery steps described above. The dose of ultraviolet light may be measured by a sensor.

The method of installing the ultraviolet module in the water in the water tank is not particularly limited, and the ultraviolet module may be put into the water tank through the opening of the water tank. At this time, when a plurality of ultraviolet modules are installed, it is preferable to connect the ultraviolet modules to each other. The coupling facilitates the recovery of the UV module during the recovery step described above.
The means for connecting the plurality of ultraviolet modules is not particularly limited, and a connecting member such as a thread or a string can be used.

It is preferable that the ultraviolet module 10 continues to float in water after being put into water. When the UV module floats in water, the UV module rotates due to convection in the water or vibration from the outside, and / or moves in the water tank, so that the UV light is uniformly irradiated into the water tank. The bactericidal effect spreads to every corner. In addition, deterioration of the water tank or the like can be prevented without intensively irradiating a specific portion. A stirrer such as a rotor, a screw, or a circulation device may be installed in the water tank to generate a water flow.

Since the ultraviolet module 10 continues to float in water, it is preferable that the specific gravity of the water to be treated in the water tank and the specific gravity of the ultraviolet module are substantially the same. Approximately the same means that the difference in specific gravity is within 10%, may be within 5%, may be within 3%, may be within 2%, and may be within 1%.
When a plurality of ultraviolet modules are installed, the specific gravities of the plurality of ultraviolet modules may be the same, or the specific gravities may be balanced by the plurality of ultraviolet modules as in the normal distribution.
From the viewpoint that the water to be treated in the water tank is not over-irradiated and can be irradiated over the entire surface and uniformly, for example, the difference in specific gravity with water is within 10% with respect to the total number of ultraviolet modules. The UV module is 50 to 60%, the difference in specific gravity from water is within 5%, the UV module is 5 to 10%, and the difference in specific gravity from water is within 3%, 10 to 15
It is preferable to install the ultraviolet module so that the ratio of the ultraviolet module is 20 to 30% and the difference in specific gravity from water is within 1%.
In order to adjust the specific gravity of the ultraviolet module, there are methods such as adjusting the weight of the battery that is the power source and the ultraviolet light source, and adjusting the amount of substances with low specific gravity such as air and urethane that are present in the case. can give.

The ultraviolet module 10 installed in the water tank 20 is taken out from the water tank and collected after a certain period of time. The method of recovery is not particularly limited, for example, a method of opening the lid 23 of the water tank 20 and collecting from the opening using a patterned net, opening the lid 23 and invading the water tank 20 through the opening. Examples include a method of collecting by hand. Here, when a plurality of ultraviolet modules 10 are connected, the ultraviolet modules can be collected in a worm-like manner, which facilitates collection. Further, by connecting a member capable of floating in the water to be treated to the tip or end of the plurality of connected ultraviolet modules, recovery becomes easier.

Another embodiment of the present invention is a water tank that implements the above water treatment method. Specifically, it is a water tank in which water to be treated is stored, and an irradiation module including a power source, a radiation source connected to the power source, and a case in which the radiation source and the power source are stored in the water to be treated. Is arranged, and the radiation irradiation module is a water tank which can be located at an arbitrary place in a predetermined region of the water to be treated in the water tank.

In the present embodiment, the radiation irradiation module is arranged in the water in the water tank in which the water to be treated is stored. Then, the radiation irradiation module may be located at an arbitrary position in a predetermined area of the water to be treated in the water tank. That is, the radiation irradiation module is not connected to the water tank in the water to be treated, and its movement is not restricted by a guide or the like connected to the water tank, and can freely move up, down, left, right, front and back. In the present embodiment, since the radiation irradiation module can move freely up, down, left, right, front and back, it rotates and / or moves in water as appropriate due to the water flow or convection generated in the water tank, and the radiation is uniformly moved in the water tank. Since it is irradiated, the bactericidal effect of radiation spreads to every corner. In addition, deterioration of the water tank or the like can be prevented without intensively irradiating a specific portion.

In order to increase the mobility of the irradiation module in water, it is preferable that the specific gravity of the water to be treated on which the irradiation module is arranged and the specific gravity of the irradiation module are substantially the same as described above.
It is also possible to install an isolation member in the water tank to control the range in which the radiation irradiation module can move without limitation. As the isolation member, any material may be used as long as it does not pass through the irradiation module but allows water to be treated to pass through, and a net is typically used. Further, when the water tank has an inlet and an outlet for untreated water, a net can be installed at the outlet in order to prevent the radiation irradiation module from flowing out together with the untreated water from the outlet.

10 UV module 11 Power supply 12 UV light source 13 Case 20 Water tank 21 Inlet 22 Outlet 23 Lid

Claims (10)

It is a water treatment method for the water to be treated in the aquarium.
A step of preparing a radiation irradiation module including a radiation source, a power source for supplying electricity to the radiation source, and a case containing the radiation source and the power source.
A water treatment method including a step of installing the radiation irradiation module so that it can be located at an arbitrary place in the water to be treated in a water tank, and a step of irradiating the water to be treated with radiation emitted from the radiation irradiation module. The water treatment method according to claim 1, wherein the radiation is ultraviolet rays. The water treatment method according to claim 1 or 2, further comprising a module activation step of supplying electricity from the power source to the radiation source and causing the radiation irradiation module to emit radiation. The water treatment method according to any one of claims 1 to 3, further comprising a recovery step of removing the radiation irradiation module installed in the water tank from the water tank. The water treatment method according to claim 4, wherein the water tank is provided with a radiation source confirmation means and / or a water quality confirmation means, and the confirmation means determines the implementation time of the recovery step. A water tank that stores water to be treated
A radiation irradiation module including a radiation source, a power source for supplying electricity to the radiation source, and a case for storing the radiation source and the power source is arranged in the water to be treated.
The irradiation module is a water tank arranged so that it can be located at an arbitrary location in a predetermined area of the water to be treated in the water tank. The water tank according to claim 6, wherein a plurality of radiation irradiation modules are arranged in the water to be treated, and the plurality of radiation irradiation modules are connected to each other. The water tank according to claim 6 or 7, wherein the specific gravity of the water to be treated and the specific gravity of the irradiation module are substantially the same. A radiation irradiation module for liquid sterilization, which includes a radiation source, a power source for supplying electricity to the radiation source, and a case containing the radiation source and the power source. The radiation irradiation module for liquid sterilization according to claim 9, wherein the radiation sources are housed in a plurality of cases.

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