JP3657698B2 - Polluted water purification equipment by electrolytic treatment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an apparatus for purifying polluted water by electrolysis that purifies polluted water by turbidizing and sterilizing polluted water containing pollutants such as river water by an electric flotation method.
[0002]
[Prior art]
  Conventionally, various apparatuses using electrolytic treatment or the like have been devised as a method for purifying polluted water. For example, Japanese Patent Application Laid-Open No. Hei 4-244291 discloses a polluted water purification apparatus using an electrolytic treatment method. This apparatus uses a soluble electrode, and a metal ion (for example, aluminum ion) of a dissolved electrode component is used. Etc.) becomes a flocculant and aggregates the water-borne inclusions (polluting substances) in the polluted water and floats and removes them as flocks.
  There is also known a method of purifying polluted water by an electric flotation method using an insoluble electrode. In this electro-flotation method, hydrogen gas or oxygen gas generated by electrolyzing water aggregates polluted components floating in the raw water of the polluted water to form coarse particles (hereinafter referred to as “floc”). It is a method of removing from the raw water by floating on the water.
[0003]
[Problems to be solved by the invention]
  However, in the polluted water purification apparatus by the electrolytic treatment method as described in JP-A-4-244291, the use of a soluble electrode makes it possible to dissolve the electrode by using the apparatus. I have it. For this reason, there has been a problem that the electrodes must be periodically replaced.
  Moreover, since the metal ion melt | dissolved from the soluble electrode is contained in treated water when a soluble electrode is used, in order to use for drinking water, there also existed a problem that a metal ion had to be removed from treated water.
[0004]
  Furthermore, since metal chloride is generated by metal ions dissolved from the soluble electrode and chlorine ions contained in the polluted water, there is a problem that the chlorine ions contained in the polluted water are reduced and the bactericidal effect is lowered.
  In addition, the purification apparatus using an insoluble electrode has conventionally had a problem that the production efficiency of effective chlorine effective for sterilizing water is poor because the cathode is provided opposite to the anode.
  Therefore, the present invention provides a polluted water purification apparatus that can reliably remove sterilization and sterilization of polluted water containing pollutant substances such as river water even by electric flotation using an insoluble electrode, and sufficiently purify raw water. The purpose is to provide.
[0005]
[Means for Solving the Problems]
  In order to achieve this object, in the polluted water purification apparatus by electrolytic treatment according to the first aspect of the present invention, the polluted water is stored in order to agglomerate and remove the pollutant components in the polluted water as flocs by the electric flotation method. An electrolytic cell; a plurality of insoluble anodes provided in the electrolytic cell; and a plurality of cathodes provided so as to face the anode, wherein the anodes and the cathodes are alternately arranged.The diaphragm for partitioning the electrolytic cell is provided between the anode and the cathode of the electrolytic cell, and a gap through which contaminated water passes is provided between the lower end of the diaphragm and the bottom of the electrolytic cell. The diaphragm has a flock discharge port that is formed from the lid portion of the electrolytic cell toward the bottom of the electrolytic cell and that discharges a flock for each space of the electrolytic cell partitioned by the diaphragm. HaveIt is the composition which becomes.
[0006]
  Also, Claims2In the polluted water purification apparatus by electrolytic treatment of the invention described inIn order to agglomerate and remove pollutant components in the polluted water as flocs by electric flotation method, an electrolytic cell for storing the polluted water, a plurality of insoluble anodes provided in the electrolytic cell, and the anode are opposed to each other. A plurality of cathodes provided, the anodes and the cathodes are alternately arranged, a diaphragm for partitioning the electrolytic cell is provided between the anode and the cathode of the electrolytic cell, a lower end of the diaphragm and the electrolytic cell A gap through which polluted water passes is provided between the bottom, the diaphragm has a corrugated undulation, the electrolytic cell has a lid, and the diaphragm is separated from the electrolytic cell from the lid. It has a flock discharge port for discharging the flock for each space of the electrolytic cell formed toward the bottom of the cell and partitioned by the diaphragm.ConstitutionBecomeing.
[0007]
Also, Claims3In the polluted water purification apparatus by electrolytic treatment of the invention described in claim 1,1 or 2In addition to the configuration described in (1), the electrolytic cell has a sediment removal port for discharging sediment for each space partitioned by the diaphragm, and the bottom of the electrolytic cell has a downward slope toward the sediment removal port. It is the composition which has.
[0008]
  In the polluted water purification apparatus by electrolytic treatment having the above-described configuration according to claim 1, by using the insoluble anode and cathode, dissolution of the electrode can be prevented, and replacement of the electrode becomes unnecessary. Moreover, since the metal ions dissolved from the electrodes are not contained in the treated water, it is not necessary to remove the metal ions. In addition, since the anode and cathode are arranged alternately, the efficiency of water electrolysis is improved, the generation rate of flocs by the electro-flotation method is also increased, and it is ensured that polluted components from polluted water containing pollutants. Can be removed. In addition, since the insoluble anode and cathode are used, the metal ions dissolved from the electrode and the chlorine ions contained in the contaminated water do not react to form a metal salt compound. It is possible to sterilize by effectively using chlorine contained in water. In addition, since a plurality of insoluble anodes and cathodes are alternately arranged, the contact area of chlorine ions contained in the anode and polluted water is increased, the production efficiency of effective chlorine is improved, and many bacteria present in the water Furthermore, since no flocculant is added to the polluted water, contamination of water by the flocculant can be prevented.
  Moreover, in the polluted water purification apparatus by the electrolytic treatment which has the structure of Claim 1, since the partition which has a gap | interval in the lower part is provided in the electrolytic cell, the flow of polluted water is reversed in the up-down direction across the diaphragm. Flowing. Therefore, the contact between the gas generated at the anode and the cathode and the inclusions in the water is promoted, the generation efficiency of flocs by the electric flotation method and the sterilization of the polluted water can be sufficiently achieved.
  Moreover, in the polluted water purification apparatus by the electrolytic treatment which has the structure of Claim 1, since it has a floc discharge port for every space partitioned off by the diaphragm, discharge | emission of a floc becomes reliable.
[0009]
[0010]
  Also,Claim2In the polluted water purification apparatus by electrolytic treatment having the configuration described inBy using an insoluble anode and cathode, dissolution of the electrode can be prevented, and replacement of the electrode becomes unnecessary. Moreover, since the metal ions dissolved from the electrodes are not contained in the treated water, it is not necessary to remove the metal ions. In addition, since the anode and cathode are arranged alternately, the efficiency of water electrolysis is improved, the generation rate of flocs by the electro-flotation method is also increased, and it is ensured that polluted components from polluted water containing pollutants. Can be removed. In addition, since the insoluble anode and cathode are used, the metal ions dissolved from the electrode and the chlorine ions contained in the contaminated water do not react to form a metal salt compound. It is possible to sterilize by effectively using chlorine contained in water. In addition, since a plurality of insoluble anodes and cathodes are alternately arranged, the contact area of chlorine ions contained in the anode and polluted water is increased, the production efficiency of effective chlorine is improved, and many bacteria present in the water Furthermore, since no flocculant is added to the polluted water, contamination of water by the flocculant can be prevented.
  Claims2In the apparatus for purifying polluted water by electrolytic treatment having the configuration described in (1), the partition wall having a gap in the lower portion is provided in the electrolytic cell, so that the flow of the polluted water flows in the up and down direction with the diaphragm as a boundary. Therefore, the contact between the gas generated at the anode and the cathode and the inclusions in the water is promoted, the generation efficiency of flocs by the electric flotation method and the sterilization of the polluted water can be sufficiently achieved.
  And claims2In the apparatus for purifying polluted water by electrolytic treatment having the structure described in 1., since the diaphragm has wavy undulations, the flow of water is disturbed, and the contact between the submerged inclusions and the gas generated at the anode and the cathode is promoted. The production efficiency and sterilization of polluted water are also sufficient.
  Moreover, in the polluted water purification apparatus by the electrolytic process which has the structure of Claim 2, since it has a floc discharge port for every space partitioned off by the diaphragm, discharge | emission of a floc becomes reliable.
[0011]
Also, Claims3In the apparatus for purifying polluted water by electrolytic treatment having the configuration described in (1), a sediment removal port is provided for each space partitioned by a diaphragm, and the bottom of the electrolytic cell has a downward slope toward the sediment removal port. Discharge becomes easier.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, with reference to the drawings, a polluted water purification apparatus using electrolytic treatment according to an embodiment of the present invention will be described. FIG. 1 is a diagram showing an overall configuration of a polluted water purification apparatus by electrolytic treatment of the present embodiment.
  As shown in FIG. 1, a control valve 1 that controls the inflow of raw water of polluted water is connected by a pipe 3 to a pump 2 that pumps the raw water, and the pump 2 is contained in the raw water by a pipe 4. It is connected to a preliminary sedimentation tank 5 for removing inclusions.
  Although a specific configuration of the preliminary sedimentation tank 5 is not illustrated, an inclined plate using a plate or a net is provided in the preliminary sedimentation tank 5 to precipitate and remove relatively large inclusions contained in the raw water, which will be described later. It is provided to increase the purification efficiency of the electrolytic treatment.
  The preliminary sedimentation tank 5 is connected to an electrolytic tank 7 by a pipe 6. In the electrolytic cell 7, the raw water is treated and purified and sterilized by the electric flotation method.
[0013]
  Further, the electrolytic cell 7 includes a flock discharge port 8 for discharging flocs generated by the electric flotation method, a treated water discharge port 9 for discharging purified and sterilized treated water, and a sediment deposited on the bottom of the electrolytic cell 7. And a sediment removal port 10 for discharging the water.
  The treated water discharge port 9 of the electrolytic cell 7 is connected to the treated water tank 12 by a pipe 11, and the treated water tank 12 is provided with a water level sensor 13 for detecting the amount of treated water stored in the treated water tank 12. ing. The water level sensor 13 is connected to a control device 15 that controls the entire polluted water purification device by a cable 14 that transmits a detection signal. The control device 15 is also connected to a drive circuit (not shown) of the control valve 1, the pump 2, the anode 16 and the cathode 17 of the electrolytic cell 7, respectively. The configuration of the control device 15 is configured by a CPU, a RAM, a ROM, an input / output circuit with an external device, and the like (not shown).
[0014]
  Next, an electrolytic cell 7 that is a main part of the polluted water purification apparatus according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a front view of the electrolytic cell 7, and FIG. 3 is a right side view of the electrolytic cell 7.
  The external shape of the electrolytic cell 7 has a substantially rectangular parallelepiped shape, and the left side wall 20 and the right side wall 21 shown in FIG. 2 and the front wall 22 and the rear wall 23 shown in FIG. As shown in FIG. 2, the upper part of the electrolytic cell 7 is closed by the lid part 24, and the bottom of the electrolytic cell 7 is closed by the bottom part 25. In addition, a raw water inlet 26 is provided at the lower part of the left side wall 20 to take raw water of the polluted water purified by the electric flotation method into the electrolytic cell 7. The raw water inlet 26 has a preliminary sedimentation tank 5. A pipe 6 for guiding the raw water from is connected. Further, a flock discharge port 8 for discharging the flock 27 generated by the electric flotation method is provided in the upper part of the right side wall 21, and a sediment that has settled on the bottom 25 of the electrolytic cell 7 is provided in the lower part of the right side wall 21. A sediment removal port 10 for discharging substances is provided, and a treated water discharge port 9 for discharging treated water that has been purified and sterilized is provided near the flock discharge port 8 in the middle of the flock discharge port 8 and the sediment removal port 10. It has been. The precipitation removal port 10 is provided with an on-off valve 28 for opening and closing the precipitation removal port 10.
[0015]
  Next, the anode 16 and the cathode 17 provided in the electrolytic cell 7 will be described. As shown in FIG. 2, an anode 16a is provided inside the electrolytic cell 7 along the inner surface of the left side wall 20, an anode 16b is provided at a substantially central portion of the electrolytic cell 7, and a right side of the anode 16b. An anode 16 c is provided at a position facing the right side wall 21. These anodes 16a to 16c are extended from the front wall 22 to the rear wall 23, and are made of a substantially square insoluble material as shown by a wavy line in the side view of the electrolytic cell 7 shown in FIG. It is configured. The material is preferably, for example, a titanium plate that is fired and coated with a noble metal element mainly composed of platinum (Pt), iridium (Ir), or the like.
  As shown in FIG. 2, the cathode 17 is provided with a cathode 17a inside the right side wall 21 of the electrolytic cell 7, a cathode 17b is provided between the anode 16b and the anode 16c, and the anode 16a and the anode 16b A cathode 17c is provided between them. These cathodes 17a to 17c are formed of the same material and shape as the anodes 16a to 16c, and the anodes 16a to 16c and the cathodes 17a to 17c are arranged in the electrolytic cell 7 so that the intervals between them are substantially uniform. Are alternately arranged. Further, as shown in FIG. 3, a gap 29 for passing raw water is formed below the anodes 16a to 16c and the cathodes 17a to 17c, and above the anodes 16a to 16c and the cathodes 17a to 17c, A gap 30 through which treated water and floc 29 pass is provided. Therefore, the vertical length of each electrode is formed substantially the same as the length between the treated water discharge port 9 and the sediment removal port 10.
[0016]
  Next, the operation of the polluted water treatment apparatus using electrolytic treatment according to the first embodiment will be described. First, when the control valve 1 is opened and the pump 2 is started by the control of the control device 15, the raw water of the polluted water is introduced from the control valve 1, and the preliminary sedimentation tank 5 through the pipe 4 through the pipe 4 through the pipe 3. Is pumped up. In the preliminary sedimentation tank 5, relatively large inclusions contained in the raw water are precipitated and removed. Thereafter, the raw water flows into the raw water inlet 26 of the electrolytic cell 7 through the pipe 6. In the electrolytic cell 7, the raw water passes through the gap 29 along the bottom portion 25 and flows along the arrow A shown in FIG. 2 between the electrodes. The raw water that enters between the electrodes rises through the electrodes and flows toward the treated water discharge port 9 along the arrow B shown in FIG.
[0017]
  At this time, the potential of the anodes 16a to 16c is increased with respect to the cathodes 17a to 17c so that a current of about 2 to 4 A / dm 2 flows in the raw water inside the electrolytic cell 7 by the control of the control device 15. A predetermined voltage is applied to. Therefore, electrolysis of water occurs as follows.
  Near the anode ... 2H2O → 4H + + O2 ↑ + 4e-
  Near cathode ... H2O + 4e- → 4OH- + 2H2 ↑
  Here, the turbidity component in the raw water is charged in a colloidal form and is present in the raw water. However, the electrolysis of the water loses the charge, while oxygen gas is emitted from the anodes 16a to 16c. Since hydrogen gas is generated from the cathodes 17a to 17c, these gases come into contact with turbidity components in the raw water, and the turbidity components are floated on the treated water as floc 27. Then, the floc 27 flows to the flock discharge port 8 while floating on the treated water according to the flow to the treated water discharge port 9, and is discharged and removed from the flock discharge port 8. Accordingly, the turbidity component in the raw water is removed and the raw water is purified.
[0018]
  In addition, the bacteria present in the raw water are killed by energization of the current of about 2 to 4 A / dm 2 to the raw water inside the electrolytic cell 7. Moreover, the chlorine ion which exists in raw | natural water turns into hypochlorous acid by electrolysis, and also becomes a secondary factor of the said fungus death. Therefore, in the electrolytic cell 7, bacteria in the raw water can be killed and sterilized.
  Furthermore, the sediment accumulated in the bottom 25 of the electrolytic cell 7 can be discharged from the sediment removal port 10 by opening the on-off valve 28 provided in the sediment removal port 10 as appropriate.
  The water treated by the electrolytic cell 7 is stored in the treated water tank 12 from the treated water discharge port 9 through the pipe 11. The control device 15 opens and closes the control valve 1 and drives the pump 2 according to the output signal from the water level sensor 13 provided in the treated water tank 12, and the voltage between the anode 16 and the cathode 17 is also controlled. The current value flowing in the raw water is controlled to be constant.
[0019]
  As described above, in the polluted water purifying apparatus according to the present embodiment, a plurality of anodes 16a to 16c and cathodes 17a to 17c made of an insoluble material are alternately arranged, and the polluted water is disposed between the electrodes. Since the raw water is allowed to pass through, the contact between the generated gas and the inclusions (pollutant substances) in the polluted water is promoted, and the pollutants can be reliably removed from the raw water containing the pollutants by the electric flotation method.
  In addition, by supplying current to the raw water, not only can many bacteria present in the raw water be killed, but the anode and cathode are arranged alternately, improving the production efficiency of effective chlorine, It is possible to kill many bacteria that exist in
  Furthermore, by using an insoluble electrode for each of the anodes 16a to 16c and each of the cathodes 17a to 17c, the electrode does not elute by electrolysis, so there is no need to replace the electrode, and a flocculant or the like is added to the raw water. Therefore, there is an effect that it is not necessary to consider water contamination by the flocculant.
[0020]
  Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the only difference from the first embodiment is the shape of the bottom of the electrolytic cell and the lengths of the anode 16 and the cathode 17, and the other configurations are the same as described above. Description of the portion is omitted.
  As shown in FIG. 4, the bottom 32 of the electrolytic cell 31 of the second embodiment is inclined downward toward the precipitation removal port 10. Further, the anodes 16 a to 16 c and the cathodes 17 a to 17 c have longer vertical lengths as they approach the right side wall 21.
  Since the bottom portion 32 of the electrolytic cell 31 of the second embodiment is inclined downward toward the sediment removal port 10, the flow of raw water is disturbed, and the precipitate is caused by the flow of raw water and the inclination of the bottom portion 32. Flows toward the sediment removal port 10 and tends to accumulate in the vicinity of the sediment removal port 10. Therefore, the deposit can be easily discharged by opening the on-off valve 28.
[0021]
  Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a front view of the electrolytic cell 33, and FIG. 6 is a right side view of the electrolytic cell 33. In the third embodiment, the only difference from the first embodiment is the configuration of the electrolytic cell, and the other configurations are the same as those described above, so the description of the same parts is omitted.
  As shown in FIG. 5, the outer shape of the electrolytic cell 33 is a substantially rectangular parallelepiped shape, and the side wall portion is formed by the left side wall 34 and the right side wall 35 shown in FIG. 5, and the front wall 36 and the rear wall 37 shown in FIG. As shown in FIG. 5, the upper part of the electrolytic cell 33 is closed by a lid part 38, and the bottom part 39 is closed by the bottom part 39. In addition, a raw water inlet 40 for taking the raw water of the contaminated water into the electrolytic tank 33 is provided at the upper part of the left side wall 34, and a pipe 6 for introducing the raw water from the preliminary sedimentation tank 5 is provided in the raw water inlet 40. It is connected. Further, a floc discharge port 41 for discharging the floc 27 generated by the electric flotation method is provided in the upper part of the right side wall 35, and a process for discharging treated water that has been purified and sterilized is provided in the lower part of the right side wall 35. A water outlet 42 is provided. A sediment removal port 43 for discharging the sediment deposited on the bottom 39 of the electrolytic cell 33 is provided in the lower center of the front wall 36. The sediment removal port 43 has an opening / closing valve for opening and closing the precipitation removal port 43. 44 is provided. In addition, a sediment removal port 46 for discharging the sediment deposited on the bottom 39 of the electrolytic cell 33 is also provided at the bottom of the bent pipe 45 connected to the treated water discharge port 42. An on-off valve 47 that opens and closes the removal port 46 is provided.
[0022]
  Next, the anode and cathode provided in the electrolytic cell 33 will be described. Inside the electrolytic cell 33, as shown in FIG. 5, an anode 48 a is provided along the inner surface of the left side wall 34, and a cathode 49 a is provided along the inner surface of the right side wall 35. Between the anode 48a and the cathode 49a, a non-conductive partition plate 50 whose lower part is not in contact with the bottom 39 of the electrolytic cell 33 is disposed on the anode 48a side, and whose lower part is on the bottom 39 of the electrolytic cell 33 on the cathode 49a side. A non-conductive partition plate 51 that is in contact is disposed. The non-conductive partition plates 50 and 51 extend from the front wall 36 to the rear wall 37 of the electrolytic cell 33 in parallel with the anode 48a and the cathode 49a. Further, a cathode 49c is fixed to the left side surface of the non-conductive plate 50 in FIG. 5, and an anode 48b is fixed to the right side surface. Further, a cathode 49b is fixed to the left side surface of the non-conductive plate 51 in FIG. 5, and an anode 48c is fixed to the right side surface. Therefore, each anode and cathode are arranged to face each other. Here, the material of the non-conductive partition plates 50 and 51 is sufficient if it has an electrically insulating property. For example, a bakelite plate, a plastic resin, a glass plate, an acrylic plate, a ceramic plate, etc. Any material can be used as long as it has water resistance. The materials of the anodes 48a to 48b and the cathodes 49a to 49c are the same as those of the electrodes of the first embodiment.
[0023]
  In the electrolytic cell 33 of the third embodiment, the raw water flowing in from the raw water inlet 40 flows toward the bottom 39 of the electrolytic cell 33 and passes under the non-conductive partition plate 50 along the arrow C shown in FIG. Then, it rises along the arrow D, then passes over the upper part of the non-conductive partition plate 51 along the arrow E, descends along the arrow F, and discharges from the treated water discharge port 42 along the arrow G Is done. Accordingly, since the raw water is treated while repeating descending and rising, the oxygen gas and hydrogen gas generated by electrolysis can be sufficiently stirred and mixed in the raw water. Moreover, the treatment path | route of raw | natural water can also be taken long. Accordingly, the contact between the generated gas and the inclusions in the water is promoted, and the polluted components of the polluted water can be sufficiently removed by the electric flotation method.
[0024]
  Next, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a front view of the electrolytic cell 52, and FIG. 8 is a right side view of the electrolytic cell 52. In the fourth embodiment, the only difference from the first embodiment is the configuration of the electrolytic cell, and the other configurations are the same as those described above, and the description of the same parts will be omitted.
  As shown in FIG. 7, the outer shape of the electrolytic cell 52 has a substantially rectangular parallelepiped shape, and a side wall portion is formed by the left side wall 53 and the right side wall 54 shown in FIG. 7, and the front wall 55 and the rear wall 56 shown in FIG. As shown in FIG. 7, the upper part of the electrolytic cell 52 is closed by a lid part 57, and the bottom of the electrolytic cell 52 is closed by a bottom part 58. In addition, a raw water inlet 59 for taking the raw water of the contaminated water into the electrolysis tank 52 is provided at the upper part of the left side wall 53, and a pipe 6 for introducing the raw water from the preliminary sedimentation tank 5 is provided in the raw water inlet 59. It is connected. Further, a flock discharge port 60 for discharging the flock 27 generated by the electric flotation method is provided at the upper part of the right side wall 54, and the treated water that has been purified and sterilized is disposed at the upper central portion of the right side wall 54. A treated water discharge port 61 for discharging the water is provided.
[0025]
  Next, the anode and cathode provided in the electrolytic cell 52 will be described. Inside the electrolytic cell 52, as shown in FIG. 7, an anode 62a is provided along the inner surface of the left side wall 53, and a cathode 63a is provided along the inner surface of the right side wall. The electrolytic cell 52 is provided with a cathode 63b so as to face the anode 62a, and an anode 62b is provided so as to face the cathode 63a. The anodes 62a and 62b and the cathodes 63a and 63b are provided in the electrolytic cell 52. The front wall 55 extends from the front wall 55 to the rear wall 56 in parallel, and is in contact with the bottom 58. There is no gap between the bottom 58 and a gap 64 is formed at the top.
  A non-permeable diaphragm 65a is disposed between the anode 62a and the cathode 63b with a lower gap 66, and a non-permeable diaphragm 65b is also disposed between the anode 62b and the cathode 63b. Further, the non-permeable diaphragm 65c is also arranged between the anode 62b and the cathode 63a in the same manner as described above.
[0026]
  Also, sediment removal ports 67a to 67c for discharging the sediment deposited on the bottom 58 of the electrolytic cell 52 are provided in the lower part of the front wall 55 of the electrolytic cell 52 for each space partitioned by each electrode. Each of the ports 67a to 67c is provided with an opening / closing valve 68 for opening / closing the sediment removal port.
  In the electrolytic cell 52 of the fourth embodiment, the raw water flows in the order of arrows G, H, I, J, and K shown in FIG. 7, so that the flow of the raw water flows in the vertical direction on the left and right sides of the diaphragms 65a to 65c. . Therefore, oxygen gas and hydrogen gas generated by electrolysis in the raw water can be sufficiently stirred and mixed, and contact between the generated gas and the underwater inclusions in the raw water is promoted. Moreover, the treatment path | route of raw | natural water can also be taken long. Therefore, it is possible to sufficiently remove the pollutant components of the polluted water by the electric flotation method and sterilize the energized and generated hypochlorous acid.
[0027]
  In the fifth embodiment, the diaphragms may be bent so that the surfaces of the diaphragms 65a 'to 65c' have a substantially wavy undulation as shown in the diaphragms 65a 'to 65c' shown in FIG. By doing so, the flow of raw water is disturbed, and oxygen gas and hydrogen gas generated by electrolysis can be further sufficiently stirred and mixed in the raw water, and the generated gas and underwater inclusions in the raw water can be mixed. Contact is encouraged. Accordingly, it is possible to reliably remove the pollutant components of the polluted water by the electric flotation method, and to sufficiently stir and mix the hypochlorous acid generated by energization into the raw water, thereby further sterilizing.
[0028]
  Further, as the sixth embodiment, as shown in FIGS. 10 and 11, diaphragms 65a ″ to 65c ″ extend to the lid portion 57, and the diaphragms 65a ″ to 65c ″ are provided in the electrolytic cell 52. Floc discharge ports 60a to 60d may be provided on the upper portion of the front wall 55 for each space partitioned by 65c ″. With this configuration, the floc can be reliably discharged.
  Further, as in the seventh embodiment shown in FIG. 12, the bottom 58 of the electrolytic cell 57 may be formed to have a downward slope toward the precipitation outlets 67a to 67c. By doing in this way, deposits are likely to gather toward the precipitation outlets 67a to 67c, and are easily discharged from the precipitation outlets 67a to 67c.
[0029]
【The invention's effect】
  As described above, in the polluted water purification apparatus by electrolytic treatment having the above-described configuration according to claim 1, by using the insoluble anode and cathode, dissolution of the electrode can be prevented, and the electrode can be replaced. It becomes unnecessary. Moreover, since the metal ions dissolved from the electrodes are not contained in the treated water, it is not necessary to remove the metal ions. In addition, since the anode and cathode are arranged alternately, the efficiency of water electrolysis is improved, the generation rate of flocs by the electro-flotation method is also increased, and it is ensured that polluted components from polluted water containing pollutants. Can be removed. In addition, since the insoluble anode and cathode are used, the metal ions dissolved from the electrode and the chlorine ions contained in the polluted water do not react to form a metal salt compound, so the chlorine ions do not decrease. The chlorine contained in the polluted water can be effectively used to sterilize. In addition, since a plurality of insoluble anodes and cathodes are alternately arranged, the contact area of chlorine ions contained in the anode and polluted water is increased, the production efficiency of effective chlorine is improved, and many bacteria present in the water Furthermore, since no flocculant is added to the polluted water, contamination of water by the flocculant can be prevented.
  Moreover, in the polluted water purifying apparatus according to the first aspect of the present invention, the partition wall having a gap in the lower portion is provided in the electrolytic cell, so that the flow of the polluted water flows in the reverse direction across the diaphragm. . Therefore, the contact between the gas generated at the anode and the cathode and the inclusions in the water can be promoted, and the generation efficiency of flocs by the electric flotation method can be improved. In addition, the sterilized water can be sufficiently sterilized.
  Moreover, in the polluted water purification apparatus by the electrolytic treatment which has the structure of Claim 1, since it has a flock discharge port for every space partitioned off by the diaphragm, discharge | emission of a flock can be performed reliably.
[0030]
[0031]
  Moreover, in the polluted water purification apparatus by the electrolytic treatment having the above-described structure according to claim 2, by using the insoluble anode and cathode, the dissolution of the electrode can be prevented, and the replacement of the electrode becomes unnecessary. Moreover, since the metal ions dissolved from the electrodes are not contained in the treated water, it is not necessary to remove the metal ions. In addition, since the anode and cathode are arranged alternately, the efficiency of water electrolysis is improved, the generation rate of flocs by the electro-flotation method is also increased, and it is ensured that polluted components from polluted water containing pollutants. Can be removed. In addition, since the insoluble anode and cathode are used, the metal ions dissolved from the electrode and the chlorine ions contained in the polluted water do not react to form a metal salt compound, so the chlorine ions do not decrease. The chlorine contained in the polluted water can be effectively sterilized. In addition, since a plurality of insoluble anodes and cathodes are alternately arranged, the contact area of chlorine ions contained in the anode and polluted water is increased, the production efficiency of effective chlorine is improved, and many bacteria present in the water Furthermore, since no flocculant is added to the polluted water, contamination of water by the flocculant can be prevented.
  Claims2In the polluted water purification apparatus by electrolytic treatment of the invention described in 1), since the partition wall having a gap at the lower portion is provided in the electrolytic cell, the flow of the polluted water flows in the up and down direction with the diaphragm as a boundary. Therefore, the contact between the gas generated at the anode and the cathode and the inclusions in the water can be promoted, and the generation efficiency of flocs by the electric flotation method can be improved. Further, the sterilization of the polluted water can be sufficiently performed.
  And claims2In the apparatus for purifying polluted water by electrolytic treatment according to the invention described above, since the diaphragm has a substantially wavy undulation, the flow of water is disturbed, and the contact between the submerged inclusions and the gas generated at the anode and the cathode is promoted. Generation efficiency can be improved.
  Moreover, in the polluted water purification apparatus by the electrolytic treatment which has the structure of Claim 2, since it has a flock discharge port for every space partitioned off by the diaphragm, discharge | emission of a flock can be performed reliably.
[0032]
Also, Claims3In the polluted water purifying apparatus according to the invention described in the invention, since there is a sediment removal port for each space partitioned by the diaphragm, and the bottom of the electrolytic cell has a downward slope toward the sediment removal port, It can be easily discharged.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a polluted water purification apparatus by electrolytic treatment according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of an electrolytic cell used in the first embodiment of the present invention.
FIG. 3 is a right side view of the electrolytic cell used in the first embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of an electrolytic cell used in a second embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of an electrolytic cell used in a third embodiment of the present invention.
FIG. 6 is a right side view of an electrolytic cell used in a third embodiment of the present invention.
FIG. 7 is a longitudinal sectional view of an electrolytic cell used in a fourth embodiment of the present invention.
FIG. 8 is a right side view of an electrolytic cell used in a fourth embodiment of the present invention.
FIG. 9 is a longitudinal sectional view of an electrolytic cell used in a fifth embodiment of the present invention.
FIG. 10 is a longitudinal sectional view of an electrolytic cell used in a sixth embodiment of the present invention.
FIG. 11 is a right side view of an electrolytic cell used in a sixth embodiment of the present invention.
FIG. 12 is a perspective view of an electrolytic cell used in a seventh embodiment of the present invention.
[Explanation of symbols]
7 ... electrolytic cell, 8, 41 ... flock discharge port, 9, 42, 61 ... treated water discharge port, 10, 43 ... precipitation removal port, 16a, 16b, 16c ... anode, 17a, 17b, 17c ... cathode, 25, 32, 39, 58 ... bottom, 48a, 48b, 48c ... anode, 49a, 49b, 49c ... cathode, 50, 51 ... non-conducting Partition plate, 60a, 60b, 60c, 60d ... flock discharge port, 62a, 62b ... anode, 63a, 63b ... cathode, 65a, 65b, 65c ... diaphragm

Claims (3)

In the polluted water purification device that agglomerates and removes the pollutant components in the polluted water as a flock by the electric flotation method,
An electrolytic cell for storing polluted water;
A plurality of insoluble anodes provided in the electrolytic cell;
A plurality of cathodes provided to face the anode;
With
The anode and the cathode are alternately arranged ,
A diaphragm for partitioning the electrolytic cell is provided between the anode and the cathode of the electrolytic cell, and a gap through which contaminated water passes is provided between the lower end of the diaphragm and the bottom of the electrolytic cell,
The electrolytic cell has a lid, and the diaphragm is formed from the lid of the electrolytic cell toward the bottom of the electrolytic cell, and a flock that discharges a flock for each space of the electrolytic cell partitioned by the diaphragm. An apparatus for purifying polluted water by electrolysis characterized by having a discharge port . In the polluted water purification device that agglomerates and removes the pollutant components in the polluted water as a flock by the electric flotation method,
An electrolytic cell for storing polluted water;
A plurality of insoluble anodes provided in the electrolytic cell;
A plurality of cathodes provided to face the anode;
With
The anode and the cathode are alternately arranged,
A diaphragm for partitioning the electrolytic cell is provided between the anode and the cathode of the electrolytic cell, and a gap through which contaminated water passes is provided between the lower end of the diaphragm and the bottom of the electrolytic cell,
The diaphragm has a wavy undulation,
The electrolytic cell has a lid, and the diaphragm is formed from the lid of the electrolytic cell toward the bottom of the electrolytic cell, and a flock that discharges a flock for each space of the electrolytic cell partitioned by the diaphragm. polluted water purifying apparatus according to that electrolytic process characterized in that it has an outlet. The electrolytic cell, for each space partitioned by the diaphragm, has a sedimentation removal port for discharging the precipitate, and the bottom of the electrolytic cell and wherein Rukoto to have a downward gradient toward the precipitate removal ports The polluted water purification apparatus by the electrolytic treatment of Claim 1 or 2 .

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