WO2021192089A1

WO2021192089A1 - Water treatment device and water treatment method

Info

Publication number: WO2021192089A1
Application number: PCT/JP2020/013317
Authority: WO
Inventors: 裕之牛房; 直司村上; 恭平明田川
Original assignee: 三菱電機株式会社
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-09-30
Also published as: JPWO2021192089A1; JP6899968B1

Abstract

A water treatment device (1) applies a shock to water to be treated (11) by a shock application unit (4), and utilizes cavitation generated in the water to be treated (11) by a shock wave caused by the shock, to sterilize the water to be treated (11). The shock application unit (4): includes a valve (5), a piston (6), and an energy storage device (7); is disposed at one end section (2a) of a container (2); and is detachable from the container (2). The shock application unit (4): applies, to a shock application surface 5b of the valve (5), kinetic energy generated when the energy storage device (7) changes from an energy-storage state to an energy-release state; and causes a shock wave from a shock-wave-generating surface (5a) of the valve (5) to be generated in the water to be treated (11) .

Description

Water treatment equipment and water treatment method

This application relates to a water treatment apparatus and a water treatment method.

Conventionally, as a method for sterilizing microorganisms such as fungi existing in water, a method using a drug, a fine film, ozone, ultraviolet rays, cavitation, etc. is known. For example, Patent Document 1 describes an isolation portion that separates a first liquid and a second liquid, and a shock wave generation portion that generates a shock wave that propagates from the first liquid through the isolation portion and propagates to the second liquid. A purification device equipped with the above is disclosed.

In the purification device according to Patent Document 1, a shock wave is generated in the first liquid by electric discharge between electrodes, and this shock wave generates bubbles due to cavitation in the second liquid, and the liquid is sterilized by the collapse of the bubbles. It is carried out.

JP-A-2017-80656

For example, the water stored in a container such as a water bottle loses the effect of chemicals such as chlorine with the passage of time, and is contaminated by oral bacteria and the like mixed during drinking. In addition, the water stored in barrels, water tanks, etc. may be contaminated by microorganisms mixed in from the air. However, the conventional sterilization method using a chemical or a fine film has a problem that management and maintenance are complicated. Therefore, there is a demand for a simple water treatment device capable of sterilizing the water in the container without using a chemical or a fine film.

The purification device according to Patent Document 1 includes a water tank, a bacterial cell container, a shock wave generation unit including an electrode unit, an electrode support portion, and the like, and has a problem that the device configuration is complicated and the device becomes large. Therefore, it is suitable for being installed in a fixed position to treat water.

The present application discloses a technique for solving the above-mentioned problems, and provides a water treatment apparatus and a water treatment method capable of sterilizing water in a container and easy to manage and maintain. With the goal.

The water treatment device disclosed in the present application is a water treatment device that sterilizes water to be treated stored in a container having an opening at one end, and is a lid member that is removable from the opening and seals the opening. It is provided with an impact applying portion for applying an impact to the water to be treated stored in the container, and sterilization is performed by the impact applied by the impact applying portion.

The water treatment method disclosed in the present application is a water treatment method for sterilizing water to be treated stored in a container having an opening at one end, in which the opening is formed by using a lid member that can be attached to and detached from the opening. It includes a sealing step of sealing, and an impact application step of applying an impact to the water to be treated stored in the container to sterilize the water after the sealing step.

According to the water treatment apparatus disclosed in the present application, the water to be treated is sterilized by applying an impact to the water to be treated by the impact applying portion, so that conventional water using a chemical or a fine film or the like is used. It is easier to manage and maintain than the processing equipment.

Further, according to the water treatment method disclosed in the present application, since the water to be treated is sterilized by applying an impact to the water to be treated, a conventional water treatment method using a chemical or a fine membrane or the like is used. It is easier to manage and maintain than.
Other objectives, features, viewpoints and effects of the present application will become clearer from the following detailed description with reference to the drawings.

It is a perspective view which shows the water treatment apparatus in Embodiment 1. FIG. It is a schematic diagram explaining the water treatment method by the water treatment apparatus in Embodiment 1. It is a schematic diagram explaining the water treatment method by the water treatment apparatus in Embodiment 1. It is a perspective view explaining the water treatment method by the water treatment apparatus in Embodiment 1. FIG. It is a schematic diagram explaining the water treatment method by the water treatment apparatus in Embodiment 2. It is a schematic diagram explaining the water treatment method by the water treatment apparatus in Embodiment 3. It is a schematic diagram explaining the water treatment method by the water treatment apparatus in Embodiment 4. It is a perspective view which shows the lid member of the water treatment apparatus in Embodiment 5. It is a schematic diagram which shows the container of the water treatment apparatus in Embodiment 6.

Embodiment 1.
Hereinafter, the water treatment apparatus and the water treatment method according to the first embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing the water treatment apparatus according to the first embodiment, and FIGS. 2 to 4 are views for explaining the water treatment method by the water treatment apparatus according to the first embodiment. In the figure, the same and corresponding parts are designated by the same reference numerals.

The water treatment device 1 in the first embodiment sterilizes the water to be treated 11 by utilizing cavitation generated in the water 11 to be treated by a shock wave due to an impact applied to the water to be treated 11. , A lid member 3, and an impact applying portion 4.

The container 2 for storing the water to be treated 11 has a substantially circular opening 2c at the end 2a, which is one end in the axial direction shown in FIG. 1A. The lid member 3 is removable from the opening 2c and seals the opening 2c. The shape of the container 2 is not limited to the cylindrical shape shown in FIG. 1, and various deformations are possible. As the material of the container 2 and the lid member 3, a material having high watertightness and impact resistance is preferable, and examples thereof include metals such as stainless steel and aluminum, synthetic resins such as polycarbonate and acrylic resin, and combinations thereof. Be done.

The impact applying portion 4 is detachably connected to the lid member 3 and is arranged at the end portion 2a of the container 2. The impact applying portion 4 includes a valve 5, a piston 6 as a driving means, and an energy storage device 7, and at least a part of the impact applying portion 4 is integrally formed with the lid member 3. In the first embodiment, the piston 6 and the energy storage device 7 are integrally formed with the lid member 3, and the valve 5 is included in the lid member 3 by being connected to the energy storage device 7. With such a configuration, the energy storage device 7 may be attached to the valve 5 only when the water to be treated 11 is sterilized.

The valve 5 of the impact applying portion 4 has a substantially cylindrical shape, and as shown in FIG. 2A, has a shock wave generating surface 5a at one end and an impact applying surface 5b at the other end. The valve 5 is attached to one end 2a of the container 2 and closes the opening 2c. That is, the position of the shock wave generating surface 5a with respect to the container 2 is fixed. Below the peripheral surface of the valve 5, a stepped portion 5c corresponding to the thickness dimension of the container 2 is formed. A packing (not shown) such as an O-ring may be arranged on the step portion 5c in order to maintain the watertightness between the container 2 and the valve 5.

The structure of the valve 5 that maintains the watertightness of the container 2 is not limited to this, and various modifications are possible. For example, a female threaded portion for attaching the valve 5 may be formed on the inner wall near the opening 2c of the container 2, and a male threaded portion corresponding to the female threaded portion may be formed on the outer peripheral surface of the valve 5.

The other end of the container 2 has a shock wave enhancing portion 8 that reflects a shock wave due to an impact applied to the water to be treated 11 and enhances or amplifies the shock wave. In order to simplify the structure of the water treatment device 1, it is desirable that the inner wall of the bottom portion 2b of the container 2 also serves as the shock wave enhancing portion 8. The shock wave enhancing portion 8 may be a flat surface, or may be a curved surface having a parabolic curve in cross section, or a surface having irregularities.

The driving means of the impact applying unit 4 generates energy for applying an impact to the water to be treated 11, and is a non-electrified mechanism using human power, gravity, hydraulic power, wind power, or the like, or a motor driven by a battery. It is driven by an electrification mechanism such as, and generates energy. In the first embodiment, a piston 6 is provided as a driving means, and energy is stored in the energy storage device 7 by reciprocating the piston 6.

The energy storage device 7 of the impact application unit 4 includes an energy storage mechanism 7a and an impact application mechanism 7b. The energy storage mechanism 7a stores the energy generated by the piston 6 as potential energy, and the impact application mechanism 7b applies an impact to the water to be treated 11 via the valve 5. The energy storage mechanism 7a includes a spring, a spiral spring, a ratchet structure, and the like, and has an energy storage state in which potential energy is stored and an energy release state in which potential energy becomes kinetic energy. In the case of a spring, the elastic energy associated with the deformation of the spring is a type of potential energy.

The energy storage mechanism 7a switches from the energy storage state to the energy release state by a mechanical switch 7c (see FIG. 8). The impact application mechanism 7b applies kinetic energy generated when the energy storage mechanism 7a changes from the energy storage state to the energy release state to the impact application surface 5b of the valve 5. The impact (kinetic energy) applied to the impact application surface 5b of the valve 5 propagates inside the valve 5 and generates a shock wave from the impact wave generation surface 5a into the water to be treated 11.

The driving means is not limited to the piston 6, and may be any one that is driven by a non-electrified mechanism such as human power or gravity or an electrified mechanism with low energy to generate energy. When the energy storage mechanism 7a includes a royal fern (not shown), a screw winding (not shown) is used as the driving means. Elastic energy is stored by winding the royal fern of the energy storage mechanism 7a with a screw, and kinetic energy is generated when the wound royal fern is unwound.

The water treatment method by the water treatment device 1 in the first embodiment will be described with reference to FIGS. 2 to 4. First, the water to be treated 11 is stored in the container 2 having the opening 2c at one end (storage step). At this time, the amount of the water to be treated 11 is up to the scale 2d provided inside the container 2. By storing the water to be treated 11 up to the scale 2d, the position of the shock wave generation surface 5a of the valve 5 and the position of the water surface of the water to be treated 11 coincide with each other, and they come into contact with each other. A window (not shown) made of a transparent member may be provided in a part of the container 2, and a scale may be provided on the window. As shown in FIG. 2A, the water to be treated 11 stored in the container 2 contains microbubbles 12 containing a dissolved gas.

Subsequently, the opening 2c is sealed with the removable lid member 3 with respect to the opening 2c of the container 2 (sealing step). The lid member 3 includes a valve 5, a piston 6, and an energy storage device 7, which are impact applying portions 4, and a valve 5 having a shock wave generating surface 5a is attached to one end 2a of the container 2 to form an opening. Seal 2c. Further, as shown by an arrow B in the figure, the energy storage device 7 of the impact applying portion 4 is attached to the valve 5 from above.

After the sealing step, the water to be treated 11 stored in the container 2 is sterilized by applying an impact to the impact applying portion 4 connected to the lid member 3 (impact application step). As shown in FIG. 2B, an impact is applied to the water to be treated 11 in a state where the shock wave generating surface 5a is in contact with the water to be treated 11. Specifically, the energy storage device 7 is changed from the energy storage state to the energy release state by a switch, and an impact (kinetic energy) is applied to the impact application surface 5b of the valve 5.

In the shock application step, the first shock wave 13 is generated from the shock wave generation surface 5a due to the shock applied to the valve 5. As shown in FIG. 2B, the first shock wave 13 propagates in the water to be treated 11 and causes the generation and disappearance of fine bubbles due to cavitation in the water to be treated 11. The first shock wave 13 that has reached the bottom 2b of the container 2 is reflected by the shock wave enhancing unit 8 and propagates in the water to be treated 11 again.

When the first shock wave 13 is transmitted to the microbubbles 12, the microbubbles 12 are instantaneously compressed, and a second shock wave 14 due to bubble collapse is generated from the extinct microbubbles 12a. The second shock wave 14 collides with fungi such as Escherichia coli, microorganisms, viruses, etc. in the water to be treated 11 to sterilize the water to be treated 11. That is, the larger the energy of the first shock wave 13 and the larger the number of microbubbles 12 contained in the water to be treated 11, the higher the bactericidal effect.

Therefore, in the case of the water to be treated 11 having a small amount of dissolved gas, the stirring step of the water to be treated 11 may be performed after the storage step to increase the number of microbubbles 12 contained in the water to be treated 11. As a result, more second shock waves 14 due to bubble collapse can be generated.

As described above, when the position of the shock wave generating surface 5a and the position of the water surface of the water to be treated 11 match, the opening 2c of the container 2 is arranged upward and the shock wave is generated on the water surface of the water to be treated 11. An impact is applied with the surfaces 5a in contact with each other.

On the other hand, when the amount of water 11 to be treated is small and less than the scale 2d of the container 2 in the storage step, or when undissolved gas remains after the stirring step is performed, as shown in FIG. An air layer 15 may exist between the water surface 11a of the treated water 11 and the shock wave generation surface 5a.

In such a case, the propagation of the first shock wave 13 from the shock wave generation surface 5a is blocked by the air layer 15, and the first shock wave 13 is attenuated. Therefore, as shown in FIG. 4, the opening 2c of the container 2 is opened. The bottom 2b of the container 2 is arranged upward with the container 2 facing downward. As a result, the impact can be applied in a state where the shock wave generation surface 5a of the valve 5 is immersed in the water to be treated 11.

As described above, according to the water treatment apparatus 1 and the water treatment method according to the first embodiment, the impact application unit 4 applies an impact to the water to be treated 11 stored in the container 2 to generate an impact wave. Since sterilization is performed, management and maintenance are easier than with conventional water treatment devices and water treatment methods that use chemicals or fine films.

Further, since the impact applying portion 4 is removable from the container 2, replacement and maintenance are easy, and since at least a part of the impact applying portion 4 is integrally formed with the lid member 3, the number of parts is increased. The increase is suppressed and the structure becomes simple. Further, the driving means of the impact applying unit 4 generates energy for applying an impact to the water to be treated 11 by a non-electrified mechanism using human power, gravity, or the like, or an electrified mechanism such as a motor driven by a battery. , Energy can be saved.

Further, by arranging the opening 2c of the container 2 downward, the first shock wave 13 from the shock wave generation surface 5a is propagated to the water to be treated 11 without being attenuated, so that the water to be treated 11 is sterilized efficiently. Can be done well. From these facts, according to the first embodiment, a small and portable water treatment device 1 capable of easily sterilizing the water to be treated 11 at any time, such as immediately before drinking water, can be obtained.

Embodiment 2.
FIG. 5 is a diagram illustrating a water treatment method by the water treatment apparatus according to the second embodiment. The water treatment device according to the second embodiment includes a bubble generator 9 as a gas injection means for injecting gas into the water to be treated 11 stored in the container 2. Since other configurations are the same as those of the water treatment apparatus 1 in the first embodiment, the description thereof will be omitted.

The bubble generator 9 is attached near the bottom 2b of the container 2 on the opposite side of the shock wave generation surface 5a. When the container 2 is used with the opening 2c facing downward, the bubble generator 9 is attached in the vicinity of the shock wave generating surface 5a. As the bubble generator 9, a self-priming type fine bubble generator that does not require air supply from the outside is suitable, and a commercially available product can be used.

In the water treatment method using the water treatment device according to the second embodiment, in addition to the water treatment method according to the first embodiment, after the storage step, gas is injected into the water to be treated 11 stored in the container 2 by the bubble generator 9. The gas injection step is carried out. The gas injection step is performed prior to the impact application step.

According to the second embodiment, in addition to the same effect as that of the first embodiment, the second shock wave 14 due to the bubble collapse is generated by increasing the minute bubbles 12 in the water to be treated 11 by the bubble generator 9. Since it occurs frequently, the bactericidal effect increases.

Embodiment 3.
FIG. 6 is a diagram illustrating a water treatment method by the water treatment apparatus according to the third embodiment. In the water treatment device 1 of the first embodiment, the position of the shock wave generating surface 5a is fixed with respect to the container 2, but in the water treatment device of the third embodiment, the position of the shock wave generating surface 5a is movable. Since other configurations are the same as those of the water treatment apparatus 1 in the first embodiment, the description thereof will be omitted.

The valve 5A of the water treatment device according to the third embodiment is removable from the container 2, and its outer diameter is formed to be slightly smaller than the inner diameter of the container 2A. An O-ring 16 is mounted on the peripheral surface of the valve 5A to prevent leakage of the water to be treated 11.

The water treatment method by the water treatment apparatus according to the third embodiment will be briefly described with reference to FIG. After storing the water to be treated 11 in the container 2A in the storage step, as shown in FIG. 6A, the valve 5A having the shock wave generation surface 5a is inserted from one end 2a of the container 2A, and the inside of the container 2A is inserted. Install in. Further, as shown by an arrow B in the figure, the energy storage device 7 of the impact applying portion 4 is attached to the valve 5A from above. At this point, the water surface 11a of the water to be treated 11 and the shock wave generating surface 5a may not be in contact with each other.

Subsequently, as shown in FIG. 6B, the energy storage device 7 and the valve 5A are moved downward to bring the shock wave generation surface 5a into contact with the water surface 11a of the water to be treated 11. At this time, in order to match the position of the shock wave generation surface 5a with the position of the water surface 11a of the water to be treated 11, a window (not shown) made of a transparent member is provided in a part of the container 2A.

Subsequently, in the impact application step, the energy storage device 7 is changed from the energy storage state to the energy release state by a switch or the like in a state where the impact wave generation surface 5a is in contact with the water to be treated 11, and the impact is applied to the impact application surface 5b of the valve 5A. (Kinetic energy) is applied. The bactericidal action of the shock wave in the shock application step is the same as that of the first embodiment, and thus the description thereof will be omitted.

According to the third embodiment, the positions of the shock wave generating surface 5a and the water surface 11a of the water to be treated 11 can be matched regardless of the amount of the water to be treated 11, so that the first shock wave 13 is not attenuated. It is propagated to the water to be treated 11 and can be sterilized efficiently. Further, since the position of the shock wave generating surface 5a and the position of the water surface of the water to be treated 11 can be matched without turning the opening 2c of the container 2 downward, the water stored in the water storage tank or the like is sterilized. Can be done.

Embodiment 4.
FIG. 7 is a diagram illustrating a water treatment method by the water treatment apparatus according to the fourth embodiment. The water treatment apparatus according to the fourth embodiment includes the same bubble generating apparatus 9 as the second embodiment, and the gas injection step is carried out. Further, similarly to the third embodiment, the position of the shock wave generation surface 5a of the valve 5A is movable with respect to the container 2A. Since other configurations are the same as those of the water treatment apparatus according to the first embodiment, the description thereof will be omitted. According to the fourth embodiment, the same effects as those of the second and third embodiments can be obtained.

Embodiment 5.
FIG. 8 is a perspective view showing a lid member of the water treatment device according to the fifth embodiment. In the first embodiment, the piston 6 and the energy storage device 7 are integrally formed with the lid member 3, and the valve 5 is detachably formed with respect to the container 2 and the energy storage device 7. In the fifth embodiment, the valve, the piston, and the energy storage device constituting the impact applying portion 4A are integrally formed with the lid member 3A.

Further, in the water treatment device according to the fifth embodiment, the switch 7c of the energy storage device is provided on the upper surface of the lid member 3A. Since the other configurations and the water treatment method are the same as those of the water treatment apparatus 1 in the first embodiment, the description thereof will be omitted.

According to the fifth embodiment, the number of parts is further suppressed as compared with the first embodiment, and a water treatment device having a simple structure can be obtained. Further, since the valve and the energy storage device can be attached to the container at the same time, the work during processing is simplified.

Embodiment 6.
FIG. 9 is a schematic view showing a container of the water treatment device according to the sixth embodiment. The water treatment apparatus according to the sixth embodiment has a bellows structure 17 on a part of the peripheral surface of the container 2B. Since other configurations are the same as those of the water treatment apparatus 1 in the first embodiment, the description thereof will be omitted.

In the sixth embodiment, the potential energy due to the water treatment device having a height above the ground surface is used, and an impact is applied to the water to be treated 11 by the bellows structure 17 formed in a part of the container 2B. Can be done. Further, the effect of stirring the water to be treated 11 in the container 2B to increase the dissolved gas, or reflecting and enhancing or amplifying the first shock wave 13 generated from the shock wave generation surface 5a can be obtained.

Although the water treatment apparatus for sterilizing the water to be treated 11 has been described in the above-described first to sixth embodiments, it goes without saying that liquids other than water can also be sterilized.

Although the present disclosure describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations. Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 Water treatment device, 2, 2A, 2B container, 2a end, 2b bottom, 2c opening, 2d scale, 3, 3A lid member, 4, 4A shock application part, 5, 5A valve, 5a shock wave generation surface, 5b impact application surface, 5c stepped portion, 6 piston, 7 energy storage device, 7a energy storage mechanism, 7b impact application mechanism, 7c switch, 8 shock wave enhancer, 9 bubble generator, 11 water to be treated, 11a water surface, 12, 12a microbubbles, 13 first shock wave, 14 second shock wave, 15 air layer, 16 O-ring, 17 bellows structure

Claims

In a water treatment device that sterilizes water to be treated stored in a container having an opening at one end.
A lid member that is removable from the opening and seals the opening,
A shock applying portion for applying a shock to the water to be treated stored in the container is provided.
A water treatment apparatus characterized in that the sterilization is performed by the impact applied by the impact applying unit.
The water treatment device according to claim 1, wherein the impact applying portion is connected to the lid member.
The claim is characterized in that the impact applying portion includes a valve having a shock wave generating surface for generating a shock wave in the water to be treated, and a driving means for generating energy for applying the shock to the water to be treated. The water treatment apparatus according to claim 1 or 2.
The impact applying unit includes an energy storage device that stores energy generated by the driving means and applies an impact to the water to be treated via the valve, and the energy storage device stores potential energy. The water treatment apparatus according to claim 3, wherein the water treatment apparatus has an energy storage state and an energy release state in which potential energy becomes kinetic energy.
The water treatment device according to claim 4, wherein the energy storage device includes a spring, a royal fern, or a ratchet structure.
The water treatment apparatus according to any one of claims 1 to 5, wherein at least a part of the impact applying portion is integrally formed with the lid member.
The water treatment apparatus according to any one of claims 1 to 6, further comprising a shock wave enhancing portion that reflects a shock wave at the other end of the container.
The water treatment apparatus according to any one of claims 1 to 7, wherein a part of the container has a bellows structure.
The water treatment apparatus according to any one of claims 1 to 8, further comprising a gas injection means for injecting gas into the water to be treated stored in the container.
In a water treatment method for sterilizing water to be treated stored in a container having an opening at one end.
A sealing step that seals the opening using a lid member that can be attached to and detached from the opening.
A water treatment method comprising, after the sealing step, an impact application step of applying an impact to the water to be treated stored in the container to perform the sterilization.
The water treatment method according to claim 10, wherein in the impact applying step, the impact is applied by an impact applying portion connected to the lid member.
In the impact application step, the opening of the container is arranged upward, and the impact is applied in a state where the impact wave generation surface of the impact application portion is in contact with the water surface of the water to be treated. Item 11. The water treatment method according to Item 11.
11. The water treatment method described.
Further comprising a gas injection step of injecting gas into the water to be treated stored in the container.
The water treatment method according to any one of claims 10 to 13, wherein the gas injection step is performed before the impact application step.