JP2009195856A - Water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve treatment efficiency of a water treatment apparatus. <P>SOLUTION: In the water treatment apparatus (1), water to be treated is stored in an electrolytic aggregation tank (2) having an electrolysis unit (9), and electrolytic aggregation treatment is applied to the water to be treated by using the electrolysis unit (9) to remove impurities in the water to be treated. In the electrolysis unit (9), double-helical paired electrode terminals (41-49) are formed of coiled positive electrode terminals (23-31) and coiled negative electrode terminals (32-40), and a plurality of paired electrode terminals (41-49) are formed by arranging positive electrode terminals (23-31) and negative electrode terminals (32-40) so that they are opposed to each other. Further, in the electrolysis unit (9), the paired electrode terminals (41-49) are arranged in the electrolytic aggregation tank (2) in a state that the axes of the paired electrode terminals (41-49) are directed in the horizontal direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water treatment apparatus, and in particular, the water to be treated is stored in an electrolytic coagulation tank having an electrolysis device, and the electrocoagulation treatment is performed on the water to be treated using the electrolysis device. The present invention relates to a water treatment apparatus for removing impurities in treated water.

  Conventionally, water to be treated discharged in various water treatments is drained after removing impurities in the water to be treated using a water treatment device.

  As a conventional water treatment apparatus, for example, as disclosed in Patent Document 1, a water treatment apparatus that electrolytically aggregates impurities using an electrolysis apparatus is known.

  The water treatment apparatus using the electrolysis apparatus disclosed in Patent Document 1 has a configuration in which an electrolysis apparatus and a microbubble generator are provided in an electrolysis coagulation tank. A pair of rectangular plate-like electrode terminals are arranged in parallel and a DC voltage is applied between the pair of electrode terminals to electrolyze the water to be treated stored in the electrolytic agglomeration tank and to generate metal ions generated by the electrolysis In this way, impurities are aggregated.

  Further, in this water treatment apparatus, the water to be treated inside the electrolytic coagulation tank is forced to convection by the fine bubble generator and the impurities aggregated by the electrolysis apparatus are electrolyzed by the fine bubbles generated from the fine bubble generator. The impurities contained in the water to be treated are removed by floating to the upper part of the coagulation tank and overflowing the impurities from the electrolytic coagulation tank.

JP 2006-136767 A

  However, in the conventional water treatment apparatus, the pair of electrode terminals of the electrolysis apparatus are formed in a rectangular plate shape, and the water to be treated is electrolyzed between the pair of electrode terminals. Convection of the water to be treated is obstructed by the rectangular plate-shaped electrode terminals inside the coagulation tank, and the water to be treated cannot smoothly flow between the pair of electrode terminals. There was a risk that the efficiency of the electrolytic agglomeration treatment would be reduced.

  In addition, the conventional water treatment apparatus is provided with a fine bubble generator for forcibly convection of the water to be treated inside the electrolytic coagulation tank, leading to an increase in the size and cost of the water treatment apparatus. .

  Therefore, in the present invention according to claim 1, the water to be treated is stored in an electrolytic coagulation tank having an electrolysis device, and the water to be treated is subjected to electrolytic coagulation treatment on the water to be treated using the electrolysis device. In the water treatment apparatus for removing the impurities, the electrolysis apparatus decided to form a double spiral electrode terminal pair with a positive electrode terminal and a negative electrode terminal formed in a coil shape.

  Further, in the present invention according to claim 2, in the present invention according to claim 1, the electrolysis apparatus has a plurality of electrode terminal pairs in a state where the positive electrode terminal and the negative electrode terminal face each other. Decided to place.

  Moreover, in this invention which concerns on Claim 3, in this invention which concerns on the said Claim 1 or Claim 2, the said electrolyzer is a state which orient | assigned the axis line of the electrode terminal pair to the horizontal direction inside the electrolytic coagulation tank. An electrode terminal pair was arranged.

  And in this invention, there exists an effect described below.

  That is, in the present invention, since the positive electrode terminal and the negative electrode terminal formed in a coil shape form a double spiral electrode terminal pair, water to be treated in the electrolytic agglomeration tank is formed. Since the convection is not hindered by the electrode terminals, and the surface area of the positive electrode terminal and the negative electrode terminal that contributes to the electrolytic aggregation treatment of the water to be treated can be favorably secured, the electrolysis apparatus Thus, it is not necessary to separately provide a device for convection of the water to be treated, and the water treatment device can be reduced in size and cost.

  In the present invention, since a plurality of electrode terminal pairs are arranged with the positive electrode terminal and the negative electrode terminal facing each other, the positive electrode contributing to the electrolytic agglomeration treatment of the water to be treated The surface area where the electrode terminal and the negative electrode terminal face each other can be increased, and the efficiency of the electrolytic agglomeration treatment by the electrolyzer can be further improved.

  Further, in the present invention, since the electrode terminal pair is disposed in the electrolytic coagulation tank with the axis of the electrode terminal pair oriented in the horizontal direction, the electrode terminal pair is arranged vertically between the positive electrode electrode and the negative electrode terminal. A communicating gap can be formed, and the water to be treated can flow well upward by the gap communicating in the vertical direction, so that the impurities aggregated by the electrolytic agglomeration treatment are placed on the surface of the treated water. The water to be treated can be easily separated from the water to be treated and impurities.

  Hereinafter, a specific configuration of a water treatment apparatus according to the present invention and a water treatment method using the water treatment apparatus will be described with reference to the drawings.

  As shown in FIG. 1, the water treatment apparatus 1 has a filtration tank 3 connected to the downstream of the electrolytic agglomeration tank 2, a storage tank 4 connected to the downstream of the filtration tank 3, and reaggregated downstream of the storage tank 4. The tank 5 is connected in communication, the solid-liquid separation tank 6 is connected in communication downstream of the re-aggregation tank 5, and the waste water treatment tank 7 is connected in communication downstream of the solid-liquid separation tank 6.

  As shown in FIGS. 1 to 4, the electrolytic flocculation tank 2 has a function of decomposing the aggregate after electrolytically flocculating impurities contained in the water to be treated, and is a tank for storing the water to be treated. The main body 8 is provided with an electrolysis apparatus 9 for electrolytically aggregating impurities and an aggregate decomposition apparatus 10 for decomposing the aggregate aggregated by the electrolysis apparatus 9.

  The tank body 8 is formed in a bottomed cylindrical shape with a cylindrical peripheral wall 11 and a disc-like bottom wall 12 opened upward, and the bottom wall 12 is inclined downward toward the central portion. A discharge port 13 is formed in the central portion of 12, and a communication pipe 14 that connects the electrolytic agglomeration tank 2 and the filtration tank 3 is connected to the discharge port 13.

  The electrolyzer 9 has support bodies 15 and 16 made of a pair of left and right rectangular plate-like insulating materials on the upper end portion of the peripheral wall 11 of the tank body 8, and each support body 15 and 16 has three rod-like shapes. The upper ends of the metal current conductors 17 to 22 are attached with a space in the front-rear direction, and the three electrode terminals 23 to 40 having the same coil shape from the middle part to the lower end part of each of the current conductors 17 to 22 are arranged. The ends are attached in a cantilevered manner with a vertical spacing.

  Here, the electrolyzer 9 applies a positive voltage to the left conductive members 17 to 19 and applies a negative voltage to the right conductive members 20 to 22.

  Thus, the electrolyzer 9 uses the electrode terminals 23 to 31 whose ends are connected to the left current-carrying members 17 to 19 as positive electrodes and the electrode terminals 32 to 32 whose ends are connected to the right current-carrying members 20 to 22. 40 is the negative electrode.

  The electrolyzer 9 is attached to the left and right support members 15 and 16 at positions where the left and right current-carrying members 17 to 22 are opposed to each other, and the left and right current-carrying members 17 to 22 are connected to positive electrode terminals 23 to 31 and a negative electrode The positive electrode terminals 23 to 31 and the negative electrode terminals 32 to 40 are arranged at equal positions on the same axis. I have to.

  As a result, the electrolyzer 9 forms nine double spiral electrode terminal pairs 41 to 49 with the positive electrode terminals 23 to 31 and the negative electrode terminals 32 to 40 formed in a coil shape. Nine electrode terminal pairs 41 to 49 are connected to the positive electrode terminals 23 to 31 of one electrode terminal pair 41 to 49 and the negative electrode of the other electrode terminal pair 41 to 49. The terminals 32 to 40 are arranged facing each other so that the axis (center line) of each electrode terminal pair 41 to 49 is in the horizontal direction.

  The agglomerate decomposition apparatus 10 forms a suction port 50 at the lower end portion of the peripheral wall 11 of the tank body 8, connects the circulation pump 52 via the suction pipe 51 of the suction port 50, and connects the upper end portion of the peripheral wall 11 of the tank body 8. The proximal end portion of the delivery pipe 53 supported by the pipe is connected to the circulation pump 52, the distal end portion of the delivery pipe 53 is disposed at the upper center of the tank body 8, and four discharge pipes 54 to 54 are provided at the distal end portion of the delivery pipe 53. 57 is attached radially, and a number of discharge ports 58 are formed at intervals below the discharge pipes 54-57.

  The agglomerate decomposing apparatus 10 drives the circulation pump 52 to suck water to be treated inside the tank main body 8 from the suction port 50 and from the discharge ports 58 of the discharge pipes 54 to 57 to the inside of the tank main body 8. It is made to discharge toward.

  Thereby, the aggregate decomposition apparatus 10 discharges the water to be treated from the discharge ports 58 of the discharge pipes 54 to 57 toward the aggregate that has been electrolytically aggregated by the electrolysis apparatus 9 and floated on the water surface side. The agglomerates are broken down (pulverized) into granules by the water of the water to be treated.

  The agglomerate decomposition apparatus 10 discharges the water to be treated from the discharge ports 58 of the discharge pipes 54 to 57 toward the electrode terminals 23 to 40 inside the tank body 8, and the electrode terminals 23 are caused by the water flow of the water to be treated. The surface of the electrode terminals 23 to 40 is cleaned by removing dirt adhering to the surface of .about.40.

  The filtration tank 3 has a function of filtering the treated water with a filtering agent such as charcoal, and after filtering the treated water discharged from the communication pipe 14 of the electrolytic agglomeration tank 2, the storage tank is connected from the communication pipe 59. 4 is discharged.

  The storage tank 4 has a function of temporarily storing the water to be treated that has undergone the electrolytic agglomeration process and the filtration process, and temporarily stores the water to be treated discharged from the communication pipe 59 of the filtration tank 3. After the storage, the suction pump 60 is driven to discharge from the communication pipe 61 to the re-aggregation tank 5.

  The re-aggregation tank 5 has a function of aggregating the water to be treated which has decomposed the agglomerates again with a flocculant, and a stirring device 63 is provided inside the hollow tank body 62 and communicates with the bottom of the tank body 62. Tube 64 is connected.

  The reflocculation tank 5 stores the treated water inside the tank body 62 by driving the suction pump 60, and then agglomerates into the treated water and agglomerates while stirring the treated water with the stirring device 63. Impurities are aggregated with an agent.

  The solid-liquid separation tank 6 has a function of separating the solid aggregate aggregated in the reflocculation tank 5 and the liquid treated water, and is discharged from the communication pipe 64 of the reflocculation tank 5. The agglomerates and the water to be treated are subjected to a solid-liquid separation treatment with a filter and then discharged from the communication pipe 65 to the waste water treatment tank 7.

  The waste water treatment tank 7 has a function of storing the treated water after being treated in the electrolytic agglomeration tank 2, the filtration tank 3, the storage tank 4, the reaggregation tank 5, and the solid-liquid separation tank 6 and draining it to the outside. The treated water discharged from the communication pipe 65 of the solid-liquid separation tank 6 is stored and then discharged from the drain pipe 66 to the outside.

  The water treatment apparatus 1 has the above-described configuration. In particular, the water treatment apparatus 1 has a double spiral formed of a positive electrode terminal 23 to 31 and a negative electrode terminal 32 to 40 formed in a coil shape. The electrolysis apparatus 9 is formed with electrode terminal pairs 41 to 49 having a shape.

  Therefore, in the water treatment apparatus 1, the water to be treated can be convected satisfactorily through the gap between the coiled electrode terminals 23 to 40, and the convection of the water to be treated in the electrolytic coagulation tank 2 is the electrode terminal 23. The surface area where the positive electrode terminals 23 to 31 and the negative electrode terminals 32 to 40 that contribute to the electrolytic aggregation treatment of the water to be treated are opposed to each other can be satisfactorily secured. Thereby, in the said water treatment apparatus 1, while the efficiency of the electrolytic coagulation process by the electrolyzer 9 can be improved, it is not necessary to provide the apparatus for convection of to-be-processed water separately. Miniaturization and cost reduction can be achieved.

  Moreover, in the said water treatment apparatus 1, since several electrode terminal pairs 41-49 are arrange | positioned in the state which made the electrode terminal 23-31 of a positive electrode, and the electrode terminals 32-40 of a negative electrode oppose, to-be-processed The surface area of the positive electrode terminals 23 to 31 and the negative electrode terminals 32 to 40 that contribute to the water electrocoagulation treatment can be increased, and the efficiency of the electrocoagulation treatment by the electrolyzer 9 is further improved. be able to.

  Further, in the water treatment apparatus 1, since the electrode terminal pairs 41 to 49 are arranged inside the electrolytic coagulation tank 2 with the axis of the electrode terminal pairs 41 to 49 oriented in the horizontal direction, the positive electrode and the negative electrode A gap communicating in the vertical direction can be formed between the electrode terminals 23 to 40, and the water to be treated can be favorably flowed upward by the gap communicating in the vertical direction. Thereby, in the said water treatment apparatus 1, the impurity aggregated by the electrolytic aggregation process can be floated on the water surface of to-be-processed water, and the separation of to-be-processed water and an impurity can be made easy.

  Next, a water treatment method using the water treatment apparatus 1 will be described with reference to FIG.

  First, in the water treatment method using the water treatment apparatus 1, the treated water to be treated is introduced and stored in the tank body 8 of the electrolytic agglomeration tank 2 (treated water feeding step).

  Thereafter, the electrolyzer 9 is driven to apply a DC voltage between the positive electrode terminals 23 to 31 and the negative electrode terminals 32 to 40 to electrolyze the water to be treated stored in the electrolytic coagulation tank 2. Then, impurities are aggregated with metal ions generated by electrolysis (electrolytic aggregation treatment step).

  In this electrolytic agglomeration treatment step, agglomerates produced by agglomeration of impurities float as a lump on the water surface side of the water to be treated.

  Thereafter, the circulating pump 52 of the agglomerate decomposition apparatus 10 is driven to circulate the water to be treated inside the tank body 8 of the electrolytic agglomeration tank 2, and the water surface side of the water to be treated from the discharge ports 58 of the discharge pipes 54 to 57. Then, the particles are discharged toward the agglomerate floating on the surface, and the agglomerate aggregated in the electrolytic aggregation treatment step is decomposed (pulverized) into particles (aggregate decomposition treatment step).

  Thereafter, the aggregate decomposed together with the water to be treated is discharged from the electrolytic coagulation tank 2 to the filtration tank 3 and filtered through the filtration tank 3 (filtration process step).

  Then, the to-be-processed water filtered by the filtration tank 3 is discharged | emitted to the storage tank 4, and the to-be-processed water containing the aggregate decomposed | disassembled into the storage tank 4 is stored temporarily (storage process).

  Thereafter, the suction pump 60 is driven to supply the treated water from the storage tank 4 to the reflocculation tank 5, and the treated water containing the decomposed aggregate is stored inside the tank body 62 of the reflocculation tank 5, Thereafter, the flocculant is introduced into the tank body 62, and the impurities are aggregated with the flocculant while stirring the water to be treated by the stirring device 63 (reaggregation treatment step).

  Thereafter, the aggregate and the water to be treated produced by the aggregation of impurities in the re-aggregation treatment step are discharged from the re-aggregation tank 5 to the solid-liquid separation tank 6, and the solid aggregate and liquid in the solid-liquid separation tank 6 are discharged. Into water to be treated (solid-liquid separation treatment step). Here, the impurities contained in the water to be treated are removed as solid aggregates.

  Finally, only liquid treated water from which impurities have been removed through the above-mentioned electrolytic coagulation treatment step, aggregate decomposition treatment step, filtration treatment step, storage step, re-aggregation treatment step, and solid-liquid separation treatment step is subjected to solid-liquid separation. It is discharged from the tank 6 to the waste water treatment tank 7 and then drained to the outside from the drain pipe 66 of the waste water treatment tank 7 (drainage treatment process).

  As described above, in the water treatment apparatus 1, the water to be treated is stored in the electrolytic coagulation tank 2 having the electrolyzer 9, and the electrocoagulation treatment is performed on the water to be treated using the electrolyzer 9. By applying, impurities in the water to be treated are removed.

  And in the said water treatment apparatus 1, while providing the aggregate decomposition apparatus 10 for decomposing | disassembling the aggregate aggregated by the electrolysis apparatus 9 in the electrolytic coagulation tank 2, the aggregate decomposition apparatus is provided downstream of the electrolytic coagulation tank 2. In the water treatment method using this water treatment apparatus 1, the aggregate that has been agglomerated by the electrolyzer 9 is decomposed, and then the water to be treated decomposed in 10 is re-agglomerated. The water to be treated that has decomposed the aggregates is aggregated again.

  Therefore, in the water treatment method using the water treatment apparatus 1, impurities in the water to be treated are re-agglomerated using the decomposed aggregate as a nucleus, and the treatment is performed without increasing the size of the electrolyzer 9. Impurities contained in water can be well aggregated, and the efficiency of water treatment can be improved.

  In the water treatment apparatus 1, a circulation pump 52 for circulating the water to be treated stored in the electrolytic coagulation tank 2 and a discharge pipe for discharging the water to be treated circulated by the circulation pump 52 toward the aggregates. 54 to 57 are provided in the aggregate decomposition apparatus 10, and in the water treatment method using the water treatment apparatus 1, the treated water stored in the electrolytic coagulation tank 2 is circulated and the treated water to be circulated is aggregated. Since the aggregates aggregated by the electrolyzer 9 are to be decomposed by discharging toward the object, the aggregate can be decomposed by effectively using the water to be treated.

  Furthermore, in the water treatment apparatus 1, the discharge ports 58 for discharging the water to be treated toward the electrode terminals 23 to 40 of the electrolyzer 9 are formed in the discharge pipes 54 to 57. In the water treatment method using water, the treated water to be circulated is discharged toward the electrode terminals 23 to 40 of the electrolyzer 9 together with the agglomerates. The terminals 23 to 40 can be cleaned.

The block diagram which shows a water treatment apparatus. The top view which shows an electrolytic coagulation tank. FIG. FIG. Explanatory drawing which shows the water treatment method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water treatment apparatus 2 Electrolytic coagulation tank 3 Filtration tank 4 Storage tank 5 Re-coagulation tank 6 Solid-liquid separation tank 7 Waste water treatment tank 8 Tank main body 9 Electrolytic apparatus 10 Aggregate decomposition apparatus
11 Perimeter wall 12 Bottom wall
13 Discharge port 14 Communication pipe
15,16 Support 17-22 Current carrying body
23 to 40 Electrode terminals 41 to 49 Electrode terminal pairs
50 Suction port 51 Suction tube
52 Circulation pump 53 Delivery pipe
54 to 57 Discharge pipe 58 Discharge port
59 Communication pipe 60 Suction pump
61 Communication pipe 62 Tank body
63 Stirrer 64 Communication pipe
65 Communication pipe 66 Drain pipe

Claims (3)

In a water treatment apparatus that removes impurities in water to be treated by storing the water to be treated in an electrolytic coagulation tank having an electrolyzer, and subjecting the water to be treated with electrolytic coagulation using the electrolyzer.
The electrolysis apparatus is a water treatment apparatus in which a double spiral electrode terminal pair is formed by a positive electrode terminal and a negative electrode terminal formed in a coil shape.   2. The water treatment apparatus according to claim 1, wherein the electrolyzer has a plurality of electrode terminal pairs arranged with a positive electrode terminal and a negative electrode terminal facing each other.   3. The water treatment apparatus according to claim 1, wherein the electrolysis apparatus has an electrode terminal pair disposed in an electrolytic coagulation tank with an axis of the electrode terminal pair oriented in a horizontal direction. 4.

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