JP6747950B2 - Water treatment equipment - Google Patents

Description

The present invention relates to a water treatment device.

Conventionally, a treated water tank for treating wastewater and a return flow path for feeding back the purified water after the treatment are provided, and the purified water after treatment in the treated water tank is fed back to the wastewater before treatment through the return passage. The mixed water is adjusted to adjust the water to be treated, and the mixed amount of the clean water after the treatment with respect to the wastewater before the treatment is a predetermined range in which the concentration index and the flow rate of the water to be treated are suitable for the treatment regarding the mode of the wastewater treatment. The concentration index of the water to be treated is detected by a sensor together with the setting so that the concentration index of the water to be treated becomes a predetermined range, and the feedback amount of the clean water after the treatment to the wastewater before the treatment and There is a wastewater treatment system characterized by controlling the amount of discharge from this treatment system (see, for example, Patent Document 1).

JP, 2010-017682, A

By the way, the conventional water treatment device is an open type water treatment device which diffuses gas generated by electrolysis. Although hydrogen is generated when water is electrolyzed, conventional water treatment devices do not recover hydrogen. In order to recover hydrogen with an open-type water treatment device, it is not easy to recover hydrogen because a device that recovers gas without releasing it and a device that extracts hydrogen from the recovered gas are required. ..

Then, it aims at providing the water treatment apparatus which can collect hydrogen easily.

A water treatment device according to an embodiment of the present invention includes a first storage tank for storing raw water, a first lid portion for sealing a first vapor phase space above the surface of the raw water, and the raw water for the first storage space. A raw water tank having a first inlet for flowing into the tank and a first outlet for discharging the raw water from the first storage tank; and a treated water containing the raw water supplied from the raw water tank A second storage tank, a first electrode and a second electrode for electrolysis arranged in the second storage tank, and a second gas phase space above the surface of the treated water in the second storage tank for sealing 2 an electrolysis treatment tank having a lid portion, a second inlet port connected to the first outlet port, and a second outlet port for discharging the treated water; and a shut-off valve provided at the first inlet port. A first pump provided between the first outlet and the second inlet for delivering the raw water from the raw water tank to the electrolysis treatment tank; and a first pump arranged inside the first storage tank. A first pipe having a first end and a second end arranged in the second gas phase space, the first pipe communicating the first storage tank with the second gas phase space; and the first gas phase has an end portion disposed in the space, seen including a second pipe for taking out the gas inside the first vapor space, while blocking the shut-off valve, the first electrode and the second electrode By applying an electric current between them to perform electrolysis, hydrogen and carbon dioxide are generated from the treated water containing chloride in the second storage tank, and a hypochlorous acid-based oxidant and chlorine are generated. The produced hydrogen, the carbon dioxide, and the chlorine are delivered from the second vapor phase space into the raw water of the first storage tank through the first pipe, and the hydrogen is emitted from the first vapor phase space. 2 Take out the hydrogen through a pipe .

A water treatment device that can easily recover hydrogen can be provided.

It is a figure which shows the water treatment apparatus 100 of Embodiment 1. It is a figure explaining operation at the time of supplying raw water 10 to raw water tank 110. It is a figure which shows the water treatment apparatus 200 of Embodiment 2. It is a figure which shows the simulation test apparatus 300.

Hereinafter, an embodiment to which the water treatment device of the present invention is applied will be described.

<Embodiment 1>
FIG. 1 is a diagram showing a water treatment device 100 according to the first embodiment. FIG. 1 shows a cross-sectional structure of the water treatment device 100.

The water treatment device 100 includes a raw water tank 110, an electrolysis treatment tank 120, a shutoff valve 130, a pump 140, a pipe 150, and a pipe 160. The water treatment device 100 is a batch-type water treatment device in which a raw water tank 110 and an electrolysis treatment tank 120 are independent.

The raw water tank 110 has a storage tank 111, a lid 112, an inflow port 113, and a discharge port 114.

The storage tank 111 is a container-shaped member having a bottom surface 111A and a side surface 111B. The storage tank 111 is provided to store the raw water 10. Storage tank 111 is an example of a first storage tank. Here, as an example, the bottom surface 111A is rectangular when viewed from above, and the side surfaces 111B are arranged on four surfaces so as to surround the bottom surface 111A.

Here, the raw water 10 is, for example, water containing organic substances such as industrial water, factory wastewater, tap water, well water, river water, lake water, seawater, and brackish water, and is the water whose quality is to be improved.

The lid 112 seals the upper end of the side surface 111B. The lid portion 112 seals the vapor phase space 115 above the water surface 10A of the raw water 10 stored in the storage tank 111. The vapor phase space 115 above the water surface 10A of the raw water 10 is an example of a first vapor phase space.

The lid 112 is formed with two openings through which the pipe 150 and the pipe 160 are inserted, and the two openings are sealed while the pipe 150 and the pipe 160 are inserted. The lid 112 is an example of a first lid.

Here, the storage tank 111 may be, for example, a very large tank having a side length of several tens of meters in plan view. Such a large storage tank 111 can be formed of, for example, reinforced concrete. In this case, the bottom surface 111A and the side surface 111B are the top surface of the bottom and the inner surface of the side wall of the storage tank 111 formed of reinforced concrete, respectively.

In this case, the lid 112 may be made of, for example, resin, metal, reinforced concrete, or the like so that the upper portion of the storage tank 111 can be sealed.

The storage tank 111 may be, for example, a relatively compact tank having a side length of several meters in plan view. Such a large storage tank 111 can be realized as a resin tank, for example. In this case, the bottom surface 111A and the side surface 111B are the upper surface of the bottom plate and the inner surface of the side wall of the resin tank, respectively.

Further, in this case, the lid portion 112 may be, for example, a resin lid attached to the upper portion of the tank so that the upper portion of the storage tank 111 can be sealed, or integrally formed with the storage tank 111. It may be the top plate of the tank to be used.

Note that the size and configuration of the storage tank 111 described above are examples, and the storage tank 111 may have various forms, and the size may be larger or smaller. The lid 112 may have various forms as long as it can seal the upper part of the storage tank 111.

The inlet 113 and the outlet 114 are provided on the side surface 111B of the storage tank 111. The inflow port 113 is provided to allow the raw water 10 to flow into the storage tank 111. The inflow port 113 is attached to a position higher than the exhaust port 114. The inflow port 113 is an example of a first inflow port.

The discharge port 114 is connected to the electrolysis treatment tank 120, and is provided for supplying the raw water 10 inside the storage tank 111 to the electrolysis treatment tank 120. The discharge port 114 is an example of a first discharge port.

The electrolysis treatment tank 120 has a storage tank 121, a lid 122, an inflow port 123, a discharge port 124, and electrodes 125A and 125B.

The storage tank 121 is a container-shaped member having a bottom surface 121A and a side surface 121B. The storage tank 121 stores the treated water 20 including the raw water 10 supplied from the raw water tank 110, and is provided to improve the water quality by the electrolysis treatment.

To improve the water quality of the treated water 20, as an example, salt is added to the treated water 20 to generate a hypochlorous acid-based oxidizer in the treated water 20 while performing electrolysis treatment. Then, the oxidizing power of hypochlorous acid is used to decompose organic substances and the like contained in the treated water 20 to sterilize and decolorize the treated water 20. In this way, the quality of the treated water 20 is improved. When the raw water 10 contains chloride, it is not necessary to add salt to the treated water 20.

Storage tank 121 is an example of a second storage tank. Here, as an example, the bottom surface 121A has a rectangular shape in a plan view seen from above, and the side surfaces 121B are arranged on four surfaces so as to surround the bottom surface 121A.

Here, the treated water 20 refers to water that contains the raw water 10, is subjected to electrolysis treatment to improve the water quality, and decomposes the organic matter contained in the raw water 10 to sterilize or decolorize it. Since the treated water 20 contains an electrolyte such as an organic substance, the treated water 20 has high conductivity to some extent.

Further, in the storage tank 121, organic substances and the like contained in the treated water 20 are precipitated, so the treated water 20 is divided into a supernatant liquid in the upper portion of the storage tank 121 and a precipitation liquid in the lower portion of the storage tank 121. The degree of water quality improvement is different. Therefore, the supernatant liquid of the treated water 20 is discharged from the discharge port 124. A drain (not shown) for extracting the precipitation liquid is provided at the bottom of the storage tank 121.

The lid 122 seals the upper end of the side surface 121B. The lid 122 seals the vapor phase space 127 above the water surface 20A of the treated water 20 stored in the storage tank 121. The vapor phase space 127 above the water surface 20A of the treated water 20 is an example of a second vapor phase space.

An opening for inserting the pipe 150 is formed in the lid 122, and the opening is sealed while the pipe 150 is inserted. The lid 122 is an example of a second lid.

Here, the storage tank 121 may be a very large tank having a side length of several tens of meters in plan view. Such a large storage tank 121 can be formed of, for example, reinforced concrete. In this case, the bottom surface 121A and the side surface 121B are respectively the upper surface of the bottom and the inner surface of the side wall of the storage tank 121 formed of reinforced concrete. Here, as an example, it is assumed that the storage tank 121 is larger than the storage tank 111.

In this case, the lid 122 may be made of, for example, resin, metal, reinforced concrete, or the like so that the upper portion of the storage tank 121 can be sealed.

The storage tank 121 may be, for example, a relatively compact tank having a side length of several meters in plan view. Such a large storage tank 121 can be realized as, for example, a resin tank. In this case, the bottom surface 121A and the side surface 121B are the upper surface of the bottom plate and the inner surface of the side wall of the resin tank, respectively.

In this case, the lid 122 may be, for example, a resin lid attached to the upper part of the tank so that the upper part of the storage tank 121 can be sealed, or the lid part 122 and the storage tank 121 are integrally formed. It may be the top plate of the tank to be used.

The size and configuration of the storage tank 121 described above are examples, and the storage tank 121 may have various forms, and the size may be larger or smaller. The lid 122 may have various forms as long as it can seal the upper part of the storage tank 121.

The inlet 123 and the outlet 124 are provided on the side surface 121B of the storage tank 121. The inflow port 123 is connected to the discharge port 114 of the raw water tank 110 via the pump 140, and is provided to allow the raw water 10 to flow from the raw water tank 110 into the storage tank 121. The inflow port 123 is attached at the same height as the exhaust port 124. The inflow port 123 is an example of a second inflow port. In FIG. 1, the upper end of the inflow port 123 and the water surface 20A of the treated water 20 are equal in height, but the inflow port 123 may be located higher than the water surface 20A of the treated water 20 inside the storage tank 121.

The discharge port 124 is provided for discharging the treated water 20 inside the storage tank 121 to the wastewater treatment device. The outlet 124 is located at a position lower than the water surface 20A of the treated water 20 inside the storage tank 121 in the height direction.

In FIG. 1, the upper end of the discharge port 124 is almost at the same height as the water surface 20A. However, in order to prevent the gas generated in the storage tank 121 from coming out of the discharge port 124, the discharge port 124 has a height direction. In, at a position lower than the designed water surface 20A. The discharge port 124 is an example of a second discharge port.

The electrodes 125A and 125B are arranged inside the storage tank 121. A power source 126 that outputs DC power is connected between the electrodes 125A and 125B, the electrode 125A serves as an anode, and the electrode 125B serves as a cathode.

The electrodes 125A and 125B used as the anode and the cathode may be, for example, electrodes made of titanium (Ti), and the surface of the electrode 125A used as the anode is coated with platinum (Pt) or iridium dioxide (IrO ₂ ). You may form a film.

The electric current output from the power source 126 flows through the treated water 20 between the electrodes 125A and 125B, so that the treated water 20 is electrolyzed. In the electrolysis treatment, hydrogen (H ₂ ) is generated at the electrode 125A (anode) and carbon dioxide (CO ₂ ) is generated at the electrode 125B (cathode). Carbon dioxide generated at the electrode 125B (cathode) is derived from the organic matter contained in the treated water 20.

Further, in the electrolysis treatment of the treated water 20, a hypochlorous acid-based oxidizing agent is generated in the treated water 20 in the storage tank 121, so that chlorine (Cl ₂ ) is generated from the surplus oxidizing agent.

Therefore, hydrogen, carbon dioxide, and chlorine generated from the treated water 20 are stored in the gas phase space 127.

The power supply 126 is a DC power supply that outputs DC power to the electrodes 125A and 125B. The capacity of the power supply 126 and the number of the electrodes 125A and 125B may be set to appropriate values according to the capacity of the storage tank 121, the amount of the treated water 20 stored in the storage tank 121, and the like.

The shutoff valve 130 is provided at the inflow port 113 of the raw water tank 110, and controls the amount of the raw water 10 flowing into the storage tank 111 from the facility (primary side facility) on the upstream side of the raw water tank 110. It is provided. When the shutoff valve 130 is shut off, the raw water 10 does not flow into the storage tank 111 from the facility on the primary side. When the shutoff valve 130 is opened, the raw water 10 flows into the storage tank 111 from the facility on the primary side.

The facilities on the primary side are, for example, factories, rivers, lakes and marshes.

The pump 140 is provided in the flow path between the outlet 114 of the raw water tank 110 and the inflow port 123 of the electrolysis treatment tank 120, and delivers the raw water 10 from the raw water tank 110 to the electrolysis treatment tank 120.

The pump 140 may be, for example, an electric pump, and the amount of the raw water 10 supplied from the raw water tank 110 to the electrolysis treatment tank 120 can be adjusted by adjusting the delivery amount of the pump 140. The pump 140 is an example of a first pump.

When the raw water 10 is sent from the raw water tank 110 to the electrolysis treatment tank 120 by the pump 140, the treated water 20 is discharged from the electrolysis treatment tank 120 through the discharge port 124 by the amount of the sent raw water 10.

Therefore, the amount of the raw water 10 delivered by the pump 140 may be set to an appropriate amount in relation to the amount of the treated water 20 whose water quality is improved in the electrolysis treatment tank 120. In addition, the pump 140 may be driven intermittently, and the pump 140 may be driven when the quality of the treated water 20 in the electrolysis treatment tank 120 is improved to some extent.

The pipe 150 has an end portion 151 arranged inside the storage tank 111 of the raw water tank 110 and an end portion 152 arranged in the vapor phase space 127 above the water surface 20A of the treated water 20 of the electrolysis treatment tank 120. It is a pipe that has and connects the storage tank 111 and the vapor phase space. The pipe 150 is an example of a first pipe.

The pipe 150 may be made of any material as long as it has no reactivity with hydrogen, carbon dioxide, and chlorine. Further, although the pipe 150 will be described here, any form of pipe may be used as long as it can form a flow path having a hermeticity between the storage tank 111 and the vapor phase space 127.

The pipe 150 delivers hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 to the storage tank 111. When the raw water 10 is sent from the raw water tank 110 to the electrolysis treatment tank 120 by the pump 140, a negative pressure is generated in the raw water 10 in the raw water tank 110. Utilizing this negative pressure, hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are delivered to the storage tank 111 via the pipe 150.

Thereby, the raw water 10 is stirred. In FIG. 1, gas such as hydrogen delivered into the liquid of the raw water 10 is shown as bubbles. Further, among hydrogen, carbon dioxide, and chlorine sent out into the liquid of the raw water 10, carbon dioxide and chlorine are dissolved in the raw water 10, so that hydrogen is mainly stored in the vapor phase space 115. In the water treatment device 100, hydrogen is extracted by utilizing the difference in water solubility between hydrogen, carbon dioxide, and chlorine that are delivered into the liquid of the raw water 10.

The hydrogen, carbon dioxide, and chlorine generated from the treated water 20 may be stored in the gas phase space 127, so that the pressure in the gas phase space 127 may increase. Hydrogen, carbon dioxide, and chlorine may be delivered from the raw water tank 110 to the electrolysis treatment tank 120 via the pipe 150 by utilizing such a rise in the pressure in the gas phase space 127. The delivery of gas such as hydrogen due to such pressure increase can be performed in addition to the delivery using the negative pressure described above.

The pipe 160 has an end 161 arranged in the vapor phase space 115 and a valve 162 provided in the middle of the pipe 160, and is provided to take out hydrogen gas stored in the vapor phase space 115. The hydrogen gas taken out through the pipe 160 can be used as a raw material (resource) for power generation in a fuel cell, for example. The pipe 160 is an example of a second pipe.

The pipe 160 may be made of any material as long as it has no reactivity with hydrogen. Further, although the pipe 160 is described here, any form of pipe may be used as long as it can form a flow path for taking out hydrogen gas stored in the vapor phase space 115.

In the water treatment device 100 as described above, the raw water 10 is stored in the raw water tank 110, the shutoff valve 130 is opened, and the valve 162 is opened. The reason why the shutoff valve 130 and the valve 162 are opened at this stage is to bring the vapor phase space 115 to the atmospheric pressure. After that, the shutoff valve 130 and the valve 162 are closed, and the pump 140 is driven to supply an appropriate amount of the raw water 10 from the raw water tank 110 to the electrolysis treatment tank 120.

Next, when the shutoff valve 130 is closed and the valve 162 is closed, a current is supplied from the power supply 126 to the electrodes 125A and 125B, the electrolytic water treatment tank 120 performs a water quality improvement treatment on the treated water 20, and hydrogen, Carbon dioxide and chlorine are generated. Hydrogen, carbon dioxide, and chlorine generated in the gas phase space 127 are sent into the liquid of the raw water 10 in the raw water tank 110 via the pipe 150, and carbon dioxide and chlorine are dissolved in the raw water 10, so that the hydrogen is in the gas phase. It is stored in the space 115. At this stage, the shutoff valve 130 and the valve 162 are closed so that the hydrogen, carbon dioxide, and chlorine generated in the gas phase space 127 of the electrolysis treatment tank 120 are passed through the pipe 150 to the gas phase space 115 of the raw water tank 110. To send it to.

Further, when the current supply from the power source 126 to the electrodes 125A and 125B is stopped, the shutoff valve 130 is closed and the valve 162 is opened, hydrogen can be taken out through the pipe 160, and a resource usable for a fuel cell or the like can be obtained. be able to.

Then, after confirming that the vapor phase space 115 of the raw water tank 110 has reached the atmospheric pressure, the pump 140 is driven to open an appropriate amount of the raw water 10 with the shutoff valve 130 and the valve 162 open. The raw water tank 110 supplies the electrolytic treatment tank 120 again. After that, with the shutoff valve 130 closed and the valve 162 closed, a current is supplied from the power supply 126 to the electrodes 125A and 125B to perform the water quality improvement treatment of the treated water 20 in the electrolysis treatment tank 120, and hydrogen, Generates carbon dioxide and chlorine. By repeating such treatment, hydrogen can be efficiently taken out.

The opening/closing operation of the shutoff valve 130 and the valve 162 in the above-described series of operations is an example, and the shutoff valve is determined according to the internal pressure of the gas phase space 115 or 127, the amount of hydrogen, carbon dioxide, and chlorine generated. The amount of opening and the open/closed state of 130 and the valve 162 may be appropriately adjusted.

Next, the operation of supplying the raw water 10 to the raw water tank 110 will be described with reference to FIG.

FIG. 2 is a diagram illustrating an operation when the raw water 10 is supplied to the raw water tank 110.

When the raw water 10 is supplied to the raw water tank 110, the shutoff valve 130 is opened, the electric current supply from the power source 126 to the electrodes 125A and 125B is stopped, and the pump 140 is stopped so that the raw water is supplied from the facility on the primary side. 10 may be poured into the storage tank 111 of the raw water tank 110. By adjusting the opening amount or opening time of the shutoff valve 130, the amount of the raw water 10 stored in the storage tank 111 can be adjusted.

As described above, while the raw water 10 is being supplied to the raw water tank 110, the current supply from the power source 126 to the electrodes 125A and 125B is stopped and the pump 140 is stopped. It is not supplied to the decomposition treatment tank 120, and hydrogen, carbon dioxide, and chlorine are not generated in the electrolysis treatment tank 120.

When the supply of the raw water 10 to the raw water tank 110 is completed, the shutoff valve 130 is closed, the pump 140 is driven, and a current is further supplied from the power source 126 to the electrodes 125A and 125B, so that the electrolytic treatment tank 120 removes the treated water 20. Water quality improvement treatment can be performed. As a result, hydrogen, carbon dioxide, and chlorine are generated, and hydrogen can be taken out through the pipe 160.

As described above, according to the first embodiment, since the gas phase space 127 above the water surface 20A of the treated water 20 in the electrolysis treatment tank 120 is sealed, hydrogen and carbon dioxide generated in the water quality improvement treatment , And chlorine are stored in the gas phase space 127.

Hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are delivered into the liquid of the raw water 10 in the raw water tank 110 via the pipe 150, and hydrogen is stored in the gas phase space 115. Hydrogen in the gas phase space 115 can be taken out through the pipe 160.

Therefore, the raw water 10 can be used to easily recover hydrogen that can be used as an energy resource. Since the water treatment device 100 extracts hydrogen by utilizing the difference in water solubility between hydrogen, carbon dioxide, and chlorine, hydrogen can be easily recovered without using a separator.

In the conventional open type water treatment device, hydrogen was diffused, but by using the water treatment device 100 as described above, a large-scale device is not required for separating hydrogen, carbon dioxide, and chlorine. Further, hydrogen can be easily taken out without requiring a power source for sending hydrogen, carbon dioxide, and chlorine from the electrolysis treatment tank 120 to the raw water tank 110.

Thus, according to the first embodiment, it is possible to provide the water treatment device 100 that can easily recover hydrogen.

Further, since hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are delivered into the liquid of the raw water 10 through the pipe 150, the raw water 10 in the storage tank 111 is stirred without using a mechanism such as a stirrer. can do.

In addition, the water treatment device 100 according to the first embodiment does not require a power source for delivering hydrogen, carbon dioxide, and chlorine from the electrolysis treatment tank 120 to the raw water tank 110, does not use a stirring mechanism, and is a storage tank. Since the raw water 10 in 111 can be stirred, the size can be reduced.

The stirring of the raw water 10 in the storage tank 111 is performed by hydrogen, carbon dioxide, and chlorine delivered from the end 151 of the pipe 150 arranged inside the storage tank 111 of the raw water tank 110. Therefore, it is preferable that the end 151 is arranged at a position where the raw water 10 is efficiently stirred. The position of the end 151 may be lower than the designed water surface 10A of the raw water 10 in the storage tank 111.

The water treatment device 100 according to the first embodiment has a simple configuration in which a lid 112, a lid 122, a pipe 150, and a pipe 160 are added to the open type water treatment device. With the water treatment device 100 having such a simple structure, it is possible to recover hydrogen that can be used as an energy resource.

Although the form in which hydrogen, carbon dioxide, and chlorine generated from the treated water 20 are stored in the gas-phase space 127 has been described above, the amount of carbon dioxide generated may vary depending on the concentration of organic substances contained in the treated water 20. May be very small.

Further, when air exists in the gas phase space 127, oxygen, nitrogen, and the like exist in the gas phase space 127 in addition to hydrogen, carbon dioxide, and chlorine. Therefore, the material of the pipe 150 and the pipe 160 may be determined in consideration of oxygen.

When hydrogen is taken out through the pipe 160 when air is present in the gas phase space 127, hydrogen may be taken out from the gas in the gas phase space 127 using a separation membrane for separating hydrogen. Further, the inside of the gas phase space 127 may be evacuated to keep the air extremely thin.

<Second Embodiment>
FIG. 3 is a diagram showing a water treatment device 200 according to the second embodiment.

The water treatment device 200 includes a raw water tank 110, an electrolysis treatment tank 120, a shutoff valve 130, a pump 140, a pipe 150, a pipe 160, and a pump 270. The water treatment device 200 of the second embodiment has a configuration in which a pump 270 is added to the water treatment device 100 of the first embodiment.

The pump 270 is provided in the pipe 150, and is provided to deliver hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 into the raw water 10 in the raw water tank 110. The pump 270 is, for example, an electric pump. The pump 270 is an example of a second pump.

In the first embodiment, when the shutoff valve 130 is opened and the valve 162 is opened, when the raw water 10 is sent from the raw water tank 110 to the electrolysis treatment tank 120 by the pump 140, the raw water 10 is supplied to the raw water tank 110. The form in which hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are delivered into the liquid of the raw water 10 in the raw water tank 110 by using the generated negative pressure has been described.

However, the negative pressure generated in the raw water 10 in the raw water tank 110 is not sufficient, and the force for delivering hydrogen, carbon dioxide, and chlorine in the vapor phase space 127 into the liquid of the raw water 10 in the raw water tank 110 is insufficient. In some cases, the pump 270 may be used.

According to the second embodiment, the hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are delivered into the liquid of the raw water 10 in the raw water tank 110 by the output of the pump 270 via the pipe 150, and the gas phase Hydrogen is stored in the space 115. If hydrogen in the gas phase space 115 is taken out through the pipe 160, hydrogen that can be used as an energy resource can be obtained.

Thus, according to the second embodiment, it is possible to provide the water treatment device 200 that can easily recover hydrogen.

Further, by sending hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 into the liquid of the raw water 10 by the pump 270 through the pipe 150, the inside of the storage tank 111 can be stored without using a mechanism such as a stirrer. The raw water 10 can be stirred.

<Third Embodiment>
FIG. 4 is a diagram showing the simulation test apparatus 300. The simulation test apparatus 300 includes an electrolysis treatment tank 120, pipes 300A and 300B, and a trap device 310. The electrolysis treatment tank 120 is similar to that shown in FIG.

One ends 301 of the pipes 300A and 300B are arranged in the gas phase space 127 of the electrolysis treatment tank 120. The pipe 300A extends to the outlet 302A via the shutoff valve 301A, and the pipe 300B passes from the vapor phase space 311 to the outlet 302B via the shutoff valve 301B and the solution 310A of the trap device 310. It is delayed.

By selectively opening/closing the shutoff valve 301A or 301B, the gas existing in the gas phase space 127 can be taken out from the takeout port 302A or 302B without passing through the solution 310A or through the solution 310A.

The solution 320 to be stored in the electrolysis treatment tank 120 is simulated drainage, which is prepared by diluting granular instant coffee with water and adjusting the chromaticity to 100 degrees and COD(Cr) to about 410 mg/L, and the electrolyte. To add 0.3 wt% of sodium chloride. The solution 320 has 750 ml. The electrolysis treatment was performed for 20 minutes by applying a current of 11 V at 3.5 A.

The solution 310A of the trap device 310 is prepared by diluting granular instant coffee with water so that the chromaticity is 100 degrees and the COD (Cr) is about 410 mg/L. The difference between the solution 310A and the solution 320 is the presence or absence of salt addition.

First, the shut-off valve 301A is opened, the shut-off valve 301B is shut off, and the gas existing in the gas phase space 127 is taken out from the take-out port 302A without passing through the solution 310A. Chlorine, hydrogen, oxygen, and nitrogen The concentration was about 210 ppm, about 32%, about 14%, and about 54%, respectively.

Further, when the shut-off valve 301A was shut off and the shut-off valve 301B was opened and electrolysis was performed, chlorine could not be collected from the outlet 302A, hydrogen, oxygen, and nitrogen could be collected, and the concentration was , About 2%, about 19%, and about 78%, respectively.

From the above, it was found that chlorine was absorbed by the solution 310A and hydrogen was also detected through the solution 310A.

Although the water treatment device according to the exemplary embodiment of the present invention has been described above, the present invention is not limited to the specifically disclosed embodiment, and without departing from the scope of the claims. Various modifications and changes are possible.

100 Water Treatment Equipment 110 Raw Water Tank 111 Storage Tank 112 Lid 113 Inlet 114 Outlet 115 Gas Phase Space 120 Electrolysis Treatment Tank 121 Storage Tank 122 Lid 123 Inlet 124 Outlet 125A, 125B Electrode 126 Power Supply 127 Gas Phase Space 130 Shutoff valve 140 Pump 150 Piping 160 Piping 200 Water treatment device 270 Pump

Claims (3)

A first storage tank for storing raw water, a first lid portion for sealing a first vapor phase space above the surface of the raw water, a first inlet for the raw water to flow into the first storage tank, and the raw water A first water outlet for discharging the water from the first storage tank,
A second storage tank for storing the treated water containing the raw water supplied from the raw water tank, a first electrode and a second electrode for electrolysis arranged in the second storage tank, and a second storage tank of the second storage tank. A second lid for sealing a second vapor space above the surface of the treated water, a second inlet connected to the first outlet, and a second outlet for discharging the treated water. An electrolysis treatment tank,
A shutoff valve provided at the first inlet;
A first pump provided between the first outlet and the second inlet for delivering the raw water from the raw water tank to the electrolysis treatment tank;
It has a 1st end part arrange|positioned inside the said 1st storage tank, and a 2nd end part arrange|positioned in the said 2nd vapor phase space, and connects the said 1st storage tank and the said 2nd vapor phase space. The first pipe to
The first has an end portion disposed in the gas phase space, viewed contains a second pipe for taking out the gas inside the first vapor space,
With the shutoff valve shut off, an electric current is passed between the first electrode and the second electrode to perform electrolysis treatment, whereby hydrogen is removed from the treated water containing chloride in the second storage tank. The carbon dioxide is generated and a hypochlorous acid-based oxidant and chlorine are generated, and the generated hydrogen, the carbon dioxide, and the chlorine are discharged from the second vapor space through the first pipe to the first pipe. A water treatment device which delivers the hydrogen into the raw water of a storage tank and takes out the hydrogen from the first gas phase space through the second pipe . The height of the second outlet, the second height of the inlet and equal, or the lower than the height of the second inlet, the water treatment apparatus according to claim 1. The water treatment device according to claim 1 or 2 , further comprising a second pump provided in the first pipe and configured to deliver the gas inside the second vapor phase space to the first storage tank.

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