JP2017109199A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment apparatus in which hydrogen can easily be recovered.SOLUTION: The water treatment apparatus comprises: a raw water tank including a first storage tank for storing raw water, a first lid for encapsulating a first gas phase space above the water surface of the raw water, a first inlet port through which the raw water inflows into the first storage tank, and a first outlet port for out-letting the raw water; an electrolysis treatment tank including a second storage tank for storing treated water, a first electrode and a second electrode for electrolysis, a second lid for encapsulating a second gas phase space above the water surface of the treated water in the second storage tank, a second inlet port connected to the first outlet port, and a second outlet port; and a first pipe arrangement including a shut-off valve provided at the first inlet port, a first pump provided between the first outlet port and the second inlet port and for delivering the raw water from the raw water tank to the electrolysis treatment tank, a first end part disposed in the inside of the first storage tank, and a second end part disposed in the second gas phase space, and for communicating between the first storage tank and the second gas phase space; and a second pipe arrangement including an end part disposed in the first gas phase space and for taking out the gas in the inside of the first gas phase space.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water treatment apparatus.

  Conventionally, it has a treated water tank that treats wastewater and a return flow path that feeds back the treated clean water, and feeds back clean water after treatment in the treated water tank to the waste water before treatment via the return flow path. The amount of water to be treated is mixed to adjust the amount of water to be treated, and the amount of clean water after treatment with respect to the waste water before treatment is a predetermined range in which the concentration index and flow rate of water to be treated are suitable for treatment. A concentration index of the water to be treated is detected by a sensor, and a feedback amount of clean water after treatment to drain before treatment so that the concentration index of the water to be treated falls within a predetermined range; There is a wastewater treatment system characterized by controlling the discharge amount from this treatment system (for example, see Patent Document 1).

JP 2010-017682 A

  By the way, the conventional water treatment apparatus is an open type water treatment apparatus that diffuses gas generated by electrolysis. Hydrogen is generated when water is electrolyzed, but conventional water treatment apparatuses do not recover hydrogen. In order to recover hydrogen with an open-type water treatment device, it is necessary to have a device that recovers gas without releasing it, and a device that extracts hydrogen from the recovered gas, and it is not easy to recover hydrogen. .

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

  The water treatment apparatus according to the embodiment of the present invention includes a first storage tank that stores raw water, a first lid that seals a first gas phase space on the surface of the raw water, and the raw water is the first storage. 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 first storage tank for storing treated water including the raw water supplied from the raw water tank. Two storage tanks, first and second electrodes for electrolysis disposed in the second storage tank, and a second gas phase space on the surface of the treated water in the second storage tank. An electrolysis treatment tank having two lid portions, a second inlet connected to the first outlet, a second outlet for discharging the treated water, and a shut-off valve provided at the first inlet The first water outlet is provided between the first outlet and the second inlet, and sends the raw water from the raw water tank to the electrolysis tank. A pump, a first end disposed in the first storage tank, and a second end disposed in the second gas phase space, the first storage tank and the second gas phase. A first pipe that communicates with the space; and a second pipe that has an end portion disposed in the first gas phase space and takes out the gas inside the first gas phase space.

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

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

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

<Embodiment 1>
FIG. 1 is a diagram illustrating a water treatment apparatus 100 according to the first embodiment. In FIG. 1, the cross-section of the water treatment apparatus 100 is shown.

  The water treatment apparatus 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 apparatus 100 is a batch-type water treatment apparatus in which the raw water tank 110 and the electrolysis treatment tank 120 are independent.

  The raw water tank 110 has a storage tank 111, a lid part 112, an inlet 113, and an outlet 114.

  The storage tank 111 is a container-like member having a bottom surface 111A and a side surface 111B. The storage tank 111 is provided for storing the raw water 10. The storage tank 111 is an example of a first storage tank. Here, as an example, the bottom surface 111A has a rectangular shape when viewed from above, and the side surfaces 111B are arranged on four sides 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 waste water, tap water, well water, river water, lake water, seawater, brine, etc., and is water that is a target for water quality improvement.

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

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

  Here, the storage tank 111 may be, for example, a very large tank having a side length of about 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 respectively the upper surface of the bottom portion of the storage tank 111 and the inner surfaces of the side walls formed of reinforced concrete.

  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.

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

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

  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 the upper part of the storage tank 111 can be sealed.

  The inflow port 113 and the discharge port 114 are provided on the side surface 111 </ b> B of the storage tank 111. The inflow port 113 is provided for allowing the raw water 10 to flow into the storage tank 111. The inflow port 113 is attached at a position higher than the discharge 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 to supply 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 includes 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-like 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 water quality by electrolysis.

  As an example, the quality of the treated water 20 is improved by adding sodium chloride to the treated water 20 and generating a hypochlorous acid-based oxidant in the treated water 20 while performing electrolysis. And the organic substance etc. which are contained in the treated water 20 are decomposed | disassembled using the oxidizing power of hypochlorous acid, and the treated water 20 is disinfected and decolored. In this way, the water quality of the treated water 20 is improved. In addition, when the raw water 10 contains a chloride, it is not necessary to add salt to the treated water 20.

  The storage tank 121 is an example of a second storage tank. Here, as an example, the bottom surface 121A has a rectangular shape when viewed from above, and the side surface 121B is arranged on four sides so as to surround the bottom surface 121A.

  Here, the treated water 20 refers to water that contains the raw water 10 and whose water quality has been improved along with the electrolysis treatment, the organic matter contained in the raw water 10 has been decomposed, and sterilization and decolorization are performed. Since the treated water 20 contains an electrolyte such as an organic substance, it has a certain degree of high conductivity.

  Moreover, in the storage tank 121, since the organic substance etc. which are contained in the treated water 20 precipitate, the treated water 20 is divided into the supernatant liquid in the upper part of the storage tank 121 and the precipitated liquid in the lower part of the storage tank 121. The degree of water quality improvement is different. For this reason, the supernatant liquid of the treated water 20 is discharged from the discharge port 124. In addition, a drain (not shown) for extracting the precipitation liquid is provided in the lower part of the storage tank 121.

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

  The lid portion 122 is formed with an opening through which the pipe 150 is inserted, and the opening is sealed with the pipe 150 being passed therethrough. The lid part 122 is an example of a second lid part.

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

  Moreover, what is necessary is just to produce the cover part 122 with resin, a metal, or a reinforced concrete etc. so that the upper part of the storage tank 121 can be sealed in this case.

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

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

  In addition, 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. Moreover, the cover part 122 may be of various forms as long as the upper part of the storage tank 121 can be sealed.

  The inflow port 123 and the discharge port 124 are provided on the side surface 121 </ b> B 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 into the storage tank 121 from the raw water tank 110. The inflow port 123 is attached at the same height as the discharge 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 20 </ b> A of the treated water 20 are equal in height, but the inflow port 123 may be at a position higher than the water surface 20 </ b> A 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 waste water treatment apparatus. The discharge port 124 is 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 20 </ b> A, but in order to prevent the gas generated in the storage tank 121 from escaping from the discharge port 124, the discharge port 124 has a height direction. In FIG. 2, the water surface is disposed at a position lower than the designed water surface 20A. The discharge port 124 is an example of a second discharge port.

  The electrodes 125 </ b> A and 125 </ b> B are disposed inside the storage tank 121. A power supply 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 made of, for example, titanium (Ti), and the surface of the electrode 125A used as the anode is made of platinum (Pt) or iridium dioxide (IrO ₂ ) by a coating process. A film may be formed.

When the current output from the power supply 126 flows through the treated water 20 between the electrodes 125A and 125B, the electrolytic treatment of the treated water 20 is performed. 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 an organic substance contained in the treated water 20.

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

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

  The power source 126 is a DC power source that outputs DC power to the electrodes 125A and 125B. What is necessary is just to set the capacity | capacitance of the power supply 126, and the number of electrodes 125A, 125B to an appropriate value according to the capacity | capacitance of the storage tank 121, the amount of the treated water 20 stored in the storage tank 121, etc.

  The shut-off valve 130 is provided at the inlet 113 of the raw water tank 110 to control the amount of raw water 10 flowing into the storage tank 111 from a facility upstream of the raw water tank 110 (primary facility). Is provided. When the shut-off valve 130 is shut off, the raw water 10 does not flow into the storage tank 111 from the primary facility. When the shut-off valve 130 is opened, the raw water 10 flows into the storage tank 111 from the primary facility.

  The primary facilities are, for example, factories, rivers, lakes, and the like.

  The pump 140 is provided in a flow path between the discharge port 114 of the raw water tank 110 and the inlet 123 of the electrolysis treatment tank 120, and sends 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.

  For this reason, what is necessary is just to set the quantity of the raw | natural water 10 sent with the pump 140 to an appropriate quantity in relation to the quantity of the treated water 20 whose water quality is improved in the electrolysis treatment tank 120. Further, the pump 140 may be driven intermittently, and the pump 140 may be driven when the water quality of a certain amount of the treated water 20 is improved in the electrolysis treatment tank 120.

  The pipe 150 includes an end portion 151 disposed inside the storage tank 111 of the raw water tank 110 and an end portion 152 disposed in the gas phase space 127 above the water surface 20A of the treated water 20 of the electrolysis treatment tank 120. And a pipe that communicates the storage tank 111 and the gas phase space. The pipe 150 is an example of a first pipe.

  The pipe 150 may be formed of any material as long as it does not have reactivity with hydrogen, carbon dioxide, and chlorine. Although described as the pipe 150 here, any form of pipe may be used as long as an airtight channel can be formed between the storage tank 111 and the gas phase space 127.

  The pipe 150 sends out 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. Using this negative pressure, hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are sent to the storage tank 111 via the pipe 150.

  Thereby, the raw | natural water 10 is stirred. In FIG. 1, a gas such as hydrogen delivered into the raw water 10 is shown as bubbles. Of hydrogen, carbon dioxide, and chlorine delivered to the raw water 10, carbon dioxide and chlorine dissolve in the raw water 10, so that hydrogen is mainly stored in the gas phase space 115. In the water treatment apparatus 100, hydrogen is extracted by utilizing the difference in water solubility between hydrogen, carbon dioxide, and chlorine that are sent into the raw water 10.

  Note that 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 sent from the raw water tank 110 to the electrolysis treatment tank 120 through the pipe 150 by using such an increase in 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 disposed in the gas phase space 115 and a valve 162 provided in the middle of the pipe 160, and is provided for taking out hydrogen gas stored in the gas phase space 115. The hydrogen gas taken out via the pipe 160 can be used as a raw material (resource) when generating power with a fuel cell, for example. The pipe 160 is an example of a second pipe.

  The pipe 160 may be formed of any material as long as it does not have reactivity with hydrogen. In addition, although described here as the pipe 160, any form of pipe may be used as long as a flow path for taking out hydrogen gas stored in the gas phase space 115 can be formed.

  In the water treatment apparatus 100 as described above, the raw water 10 is stored in the raw water tank 110, and a certain amount of raw water is fed into the raw water tank 110 from the inlet 113 while 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 make the gas phase space 115 atmospheric pressure. Thereafter, the shutoff valve 130 and the valve 162 are closed, and the pump 140 is driven to supply an appropriate amount of raw water 10 from the raw water tank 110 to the electrolysis treatment tank 120.

  Next, when current is supplied from the power source 126 to the electrodes 125A and 125B with the shutoff valve 130 closed and the valve 162 closed, the water quality improvement processing of the treated water 20 is performed in the electrolysis treatment tank 120, and hydrogen, Carbon dioxide and chlorine are generated. Hydrogen, carbon dioxide, and chlorine generated in the gas phase space 127 are sent into the raw water 10 in the raw water tank 110 through the pipe 150, and the carbon dioxide and chlorine are dissolved in the raw water 10, so that hydrogen is in the gas phase. Store in the space 115. The shutoff valve 130 and the valve 162 are closed at this stage because the hydrogen, carbon dioxide, and chlorine generated in the gas phase space 127 of the electrolysis treatment tank 120 are connected to the gas phase space 115 of the raw water tank 110 through the pipe 150. It is for sending in.

  Furthermore, when the current supply from the power supply 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 via the pipe 160, and resources that can be used for a fuel cell or the like are obtained. be able to.

  Then, after confirming that the gas phase space 115 of the raw water tank 110 has become atmospheric pressure, with the shutoff valve 130 opened and the valve 162 opened, the pump 140 is driven to supply an appropriate amount of the raw water 10. The raw water tank 110 is supplied again to the electrolysis treatment tank 120. Thereafter, with the shut-off valve 130 closed and the valve 162 closed, a current is supplied from the power source 126 to the electrodes 125A and 125B, the water quality improvement treatment of the treated water 20 is performed in the electrolysis treatment tank 120, hydrogen, Carbon dioxide and chlorine are generated. By repeating such a process, hydrogen can be taken out efficiently.

  The opening / closing operation of the shut-off valve 130 and the valve 162 in the above-described series of operations is an example, and the shut-off valve is controlled according to the internal pressure of the gas phase space 115 or 127, the generation amounts of hydrogen, carbon dioxide, and chlorine. The amount of opening and the opening / closing state of 130 and valve 162 may be adjusted as appropriate.

  Next, the operation | movement at the time of supplying the raw | natural water 10 to the raw | natural water tank 110 is demonstrated using FIG.

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

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

  Thus, while the raw water 10 is being supplied to the raw water tank 110, the current supply from the power supply 126 to the electrodes 125A and 125B is stopped and the pump 140 is stopped. Hydrogen, carbon dioxide, and chlorine are not generated in the electrolysis treatment tank 120 without being supplied to the decomposition treatment tank 120.

  When the supply of the raw water 10 to the raw water tank 110 is completed, the shut-off valve 130 is closed, the pump 140 is driven, and a current is supplied from the power supply 126 to the electrodes 125A and 125B. 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 process , And chlorine are stored in the gas phase space 127.

  Hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are sent into 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 via the pipe 160.

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

  In the conventional open-type water treatment apparatus, hydrogen is diffused, but by using the water treatment apparatus 100 as described above, a large-scale apparatus is not required for separating hydrogen, carbon dioxide, and chlorine. Moreover, 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 Embodiment 1, the water treatment apparatus 100 which can collect | recover hydrogen easily can be provided.

  Further, since hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are sent 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.

  Moreover, the water treatment apparatus 100 of Embodiment 1 does not require a power source for sending hydrogen, carbon dioxide, and chlorine from the electrolysis treatment tank 120 to the raw water tank 110, and does not use a stirring mechanism. Since the raw water 10 in 111 can be stirred, size reduction can be achieved.

  Agitation of the raw water 10 in the storage tank 111 is performed by hydrogen, carbon dioxide, and chlorine delivered from the end portion 151 of the pipe 150 arranged inside the storage tank 111 of the raw water tank 110. For this reason, it is preferable to arrange | position the edge part 151 in the position where stirring of the raw | natural water 10 is performed efficiently. What is necessary is just to make the position of the edge part 151 lower than the water surface 10A of the raw | natural water 10 in the storage tank 111 on design.

  The water treatment apparatus 100 of Embodiment 1 has a simple configuration in which a lid part 112, a lid part 122, a pipe 150, and a pipe 160 are added to an open type water treatment apparatus. In this way, the water treatment apparatus 100 having a simple configuration can recover hydrogen that can be used as an energy resource.

  In the above description, 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. However, depending on the concentration of organic matter contained in the treated water 20, the amount of carbon dioxide generated May be very small.

  When air is present in the gas phase space 127, oxygen, nitrogen, or the like is present in the gas phase space 127 in addition to hydrogen, carbon dioxide, and chlorine. For this reason, the material of the pipe 150 and the pipe 160 may be determined in consideration of oxygen.

  In addition, when air is present in the gas phase space 127, when hydrogen is extracted through the pipe 160, hydrogen may be extracted from the gas in the gas phase space 127 using a separation membrane that separates hydrogen. Further, the gas phase space 127 may be evacuated so that the air is extremely thin.

<Embodiment 2>
FIG. 3 is a diagram illustrating a water treatment apparatus 200 according to the second embodiment.

  The water treatment apparatus 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 apparatus 200 according to the second embodiment has a configuration in which a pump 270 is added to the water treatment apparatus 100 according to the first embodiment.

  The pump 270 is provided in the pipe 150, and is provided to send 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 raw water 10 is sent from the raw water tank 110 to the electrolysis treatment tank 120 by the pump 140 with the shut-off valve 130 and the valve 162 opened, the raw water 10 in the raw water tank 110 is supplied. The form in which hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are sent into the liquid of the raw water 10 in the raw water tank 110 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 there is not enough power to send hydrogen, carbon dioxide, and chlorine in the gas phase space 127 into the liquid of the raw water 10 in the raw water tank 110. In some cases, a pump 270 may be used.

  According to the second embodiment, hydrogen, carbon dioxide, and chlorine stored in the gas phase space 127 are sent into the liquid of the raw water 10 in the raw water tank 110 by the feed power 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 Embodiment 2, the water treatment apparatus 200 which can collect | recover hydrogen easily can be provided.

  In addition, 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 storage tank 111 can be used without using a mechanism such as a stirrer. The raw water 10 can be stirred.

<Embodiment 3>
FIG. 4 is a diagram showing a simulation test apparatus 300. The simulation test apparatus 300 includes an electrolysis treatment tank 120, pipes 300A and 300B, and a trap apparatus 310. The electrolysis tank 120 is the same as that shown in FIG.

  One ends 301 of the pipes 300 </ b> A and 300 </ b> B are disposed in the gas phase space 127 of the electrolysis treatment tank 120. The pipe 300A extends to the take-out port 302A via the shut-off valve 301A, and the pipe 300B passes through the shut-off valve 301B and further through the solution 310A of the trap device 310 to the gas-phase space 311 to the take-out port 302B. It is distracted.

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

  The solution 320 stored in the electrolysis treatment tank 120 is simulated waste water, diluted granular coffee with water, adjusted to have a chromaticity of 100 degrees and COD (Cr) of about 410 mg / L, and an electrolyte. In order to give water, 0.3 wt% of sodium chloride is added. Solution 320 is 750 ml. The electrolysis treatment was performed for 20 minutes by flowing an electric 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 whether or not salt is added.

  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. As a result, chlorine, hydrogen, oxygen, and nitrogen are removed. The concentrations were about 210 ppm, about 32%, about 14%, and about 54%, respectively.

  Moreover, when the shut-off valve 301A was shut off, the shut-off valve 301B was opened, and electrolysis was performed, chlorine could not be collected from the extraction port 302A, but 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 in the solution 310A and hydrogen was detected through the solution 310A.

  As mentioned above, although the water treatment apparatus of exemplary embodiment of this invention was demonstrated, this invention is not limited to embodiment disclosed specifically, and does not deviate from a claim. Various modifications and changes are possible.

DESCRIPTION OF SYMBOLS 100 Water treatment apparatus 110 Raw water tank 111 Storage tank 112 Cover part 113 Inlet 114 Outlet 115 Gas-phase space 120 Electrolysis process tank 121 Storage tank 122 Cover part 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 (4)

A first storage tank for storing raw water; a first lid for sealing a first gas-phase space on the surface of the raw water; a first inlet through which the raw water flows into the first storage tank; and the raw water A raw water tank having a first outlet for discharging the first storage tank from the first storage tank;
A second storage tank for storing treated water including the raw water supplied from the raw water tank, a first electrode and a second electrode for electrolysis disposed in the second storage tank, and a second storage tank. A second lid for sealing the second gas phase space on 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 tank;
A shutoff valve provided at the first inlet;
A first pump provided between the first discharge port and the second inflow port, for sending the raw water from the raw water tank to the electrolysis tank;
A first end disposed in the first storage tank; and a second end disposed in the second gas phase space, wherein the first storage tank communicates with the second gas phase space. A first pipe to perform,
A water treatment apparatus comprising: an end portion disposed in the first gas phase space; and a second pipe for taking out gas inside the first gas phase space.   2. The water treatment device according to claim 1, wherein in a state where the shutoff valve is shut off, hydrogen is taken out from the second pipe by flowing an electric current between the first electrode and the second electrode to perform an electrolysis treatment. .   The water treatment apparatus according to claim 1 or 2, wherein a height of the second outlet is equal to a height of the second inlet or lower than a height of the second inlet. 4. The water treatment apparatus according to claim 1, further comprising a second pump that is provided in the first pipe and sends a gas in the second gas phase space to the first storage tank. 5.

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