KR20220037884A - Method for treating pollutant and apparatus for treating pollutant - Google Patents

Abstract

The present invention relates to a pollutant treatment method and a pollutant treatment device for treating pollutants in water by an electrochemical method. The pollutant treatment method comprises the steps of: placing a metal electrode in a positive electrode chamber of an electrolytic cell in which a positive electrode chamber and a negative electrode chamber are separated, performing a water electrolysis reaction to generate a first electrolyte solution containing metal ions generated by elution of the metal electrode in the positive electrode chamber, and generating a second electrolyte solution containing hydroxide ions in the negative electrode chamber to separate and maintain the metal ions of the first electrolyte solution and the hydroxide ions of the second electrolyte solution in the positive electrode chamber and the negative electrode chamber, respectively; supplying metal ions of the first electrolyte solution and the hydroxide ions of the second electrolyte solution to one treatment tank through different channels; and generating a metal hydroxide by reacting the metal ions of the first electrolytic solution with the hydroxide ions of the second electrolytic solution in the treatment tank and coagulating and treating pollutants in the treatment tank with the metal hydroxide.

Description

BACKGROUND ART A method for treating pollutants and an apparatus for treating pollutants.

The present invention relates to a pollutant treatment method and a pollutant treatment device, and more particularly, to a pollutant treatment method and a pollutant treatment device for treating pollutants in water in an electrochemical manner.

Contaminants come from a variety of pollutants. Pollution sources may be used alone or in combination to generate various types of pollutants, and not only factory facilities in industrial complexes but also living facilities in downtown areas may be included in these pollutants. Pollutants usually have a discharge route for discharging pollutants, and the discharged pollutants are treated through an appropriate treatment process.

For example, pollutants may be mixed with water and discharged in the form of wastewater. Wastewater can be formed in various forms ranging from domestic sewage to industrial wastewater mixed with industrial waste, etc. For example, wastewater may be treated using a device for treating wastewater as disclosed in Korean Patent No. 10-1728130 or the like.

However, the conventionally widely used wastewater treatment method may have the following problems. For example, in the case of a physical treatment method that uses methods such as filtration or sedimentation, there may be problems with replacement and maintenance of consumable equipment such as filters and problems that take a long time for processing such as sedimentation, and biological treatment methods using microorganisms Even in the case of pollutant decomposition, etc., it takes a relatively long time, and there may be a problem in that it is limitedly applied only to the treatment of specific pollutants such as organic matter. In addition, in the case of a chemical treatment method using a chemical reaction, there may be a problem in that the reactant must be continuously supplied as in the above-mentioned device for wastewater treatment, as well as a problem that cannot be free from secondary contamination of the treatment facility due to the reaction product. . Therefore, there is a need for a technical alternative that can solve these problems.

Republic of Korea Patent Publication No. 10-1728130, (2017. 05. 02), Specification

The technical object of the present invention is to solve this problem, and to provide a pollutant treatment method for treating water pollutants in an electrochemical manner, and also provides a pollutant treatment device capable of performing such a treatment method will do

The technical problems of the present invention are not limited to the above-mentioned problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to the method for treating contaminants according to the present invention, (a) a metal electrode is disposed in the anode chamber of an electrolysis cell in which the anode chamber and the cathode chamber are separated, and a water electrolysis reaction is carried out, and the metal electrode is eluted from the anode chamber. A first electrolytic solution containing metal ions is generated, and a second electrolytic solution containing hydroxide ions is generated in the cathode chamber, and the metal ions of the first electrolytic solution and hydroxide ions of the second electrolytic solution are mixed with the anode chamber. and separating and maintaining each of the cathode chambers. (b) supplying the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution to one treatment tank through different flow paths; and (c) reacting the metal ions of the first electrolytic solution with the hydroxide ions of the second electrolytic solution in the treatment tank to generate a metal hydroxide, and treating the contaminants in the treatment tank by aggregating the metal hydroxide with the metal hydroxide. includes

The anode chamber and the cathode chamber may be separated by a separator that does not pass the metal ions and the hydroxide ions.

The separation membrane may include an ion exchange membrane, and the ion exchange membrane may include a cation exchange membrane that allows protons to pass therethrough.

In the step (a), the first electrolyte solution may be generated by an electrolytic reaction of the wastewater by supplying the wastewater containing the contaminants of the step (c) to the anode chamber.

In step (a), the second electrolyte solution supplies at least one of the wastewater containing the contaminants of step (c) and the purified water discharged from the treatment tank to the cathode chamber to supply at least one of the wastewater and the purified water. It can be produced by any one of the electrolytic reactions.

The metal electrode in the anode chamber may be formed of a material including at least one selected from aluminum and iron, and the metal hydroxide in the treatment tank may include at least one selected from aluminum hydroxide and iron hydroxide.

The pollutant treatment apparatus according to the present invention includes an anode chamber and a cathode chamber separated from each other, a separator disposed between the anode chamber and the cathode chamber, and a metal electrode positioned in the anode chamber, In the anode chamber, the metal electrode is eluted to generate a first electrolytic solution containing the generated metal ions, and in the cathode chamber, a second electrolytic solution containing hydroxide ions is generated, and the metal of the first electrolytic solution is an electrolysis cell which separates and maintains ions and hydroxide ions of the second electrolytic solution in the anode chamber and the cathode chamber; a treatment tank positioned outside the electrolysis cell and having a treatment space therein; a first flow path connected between the treatment tank and the anode chamber of the electrolysis cell to supply metal ions of the first electrolytic solution generated in the anode chamber to the treatment tank; and a second flow path connected between the treatment tank and the cathode chamber of the electrolysis cell to supply hydroxide ions of the second electrolytic solution generated in the cathode chamber to the treatment tank, wherein the first electrolytic solution in the treatment tank Metal ions and hydroxide ions of the second electrolytic solution are reacted to generate a metal hydroxide that aggregates contaminants in the treatment tank.

The separation membrane is composed of an ion exchange membrane that does not pass the metal ions and the hydroxide ions, and the metal ions of the first electrolyte solution and the hydroxide ions of the second electrolyte solution are separated and maintained in the anode chamber and the cathode chamber, respectively. can do it

The electrolysis cell is connected between the metal electrode and the negative electrode located in the cathode chamber to induce a potential difference, or is connected between the positive electrode and the negative electrode formed separately from the metal electrode in the anode chamber to induce a potential difference. may include more.

The metal electrode may be formed as a consumable electrode capable of eluting metal ions, and the positive electrode and the negative electrode may be formed as a non-consumable electrode.

The electrolytic cell may further include a cell body having a stacked structure formed by stacking a plurality of plate bodies having an internal space accommodating at least one of the metal electrode, the positive electrode, and the negative electrode.

The contaminant treatment apparatus may further include a first inlet pipe for introducing contaminant-containing wastewater into the anode chamber of the electrolysis cell, thereby generating the first electrolyte solution through an electrolytic reaction of the wastewater.

The pollutant treatment device further includes at least one of a second inlet pipe for introducing wastewater containing pollutants into the cathode chamber of the electrolysis cell, and a circulation pipe for circulating the purified water discharged from the treatment tank into the cathode chamber Thus, the second electrolytic solution may be generated by an electrolytic reaction of at least one of the wastewater and the purified water.

According to the present invention, it is possible to very effectively treat pollutants contained in wastewater and the like in an electrochemical manner. Through the present invention, it is possible to treat contaminants in the water by agglomeration, and in particular, it is possible to generate immediately at the treatment point without receiving a separate supply of chemical substances having a coagulant action and participate in the treatment process. Therefore, it is possible to omit the supply process and supply route of the corresponding chemical, so that the purification process can be more effective in a more simplified way and the contamination inside the device in which the process is performed can be minimized. In addition, it is possible to more effectively prevent contamination of electrodes, etc. through a structure in which the processing point where the contaminants are treated is separated from the point where the electrodes, etc. are located in the device, thereby greatly increasing the lifespan of the entire device. In addition, it is possible to obtain a significant effect in terms of application of actual equipment by implementing the device in which this processing process is performed to include a structure that is electrically efficient and easily deformable.

1 is a flowchart illustrating a method for treating pollutants according to an embodiment of the present invention.
2 is a block diagram of an apparatus for treating pollutants according to an embodiment of the present invention capable of performing the treatment method of FIG. 1 .
3 is a conceptual diagram illustrating an operating principle of an electrolysis cell of the processing apparatus of FIG. 2 .
4 is a cross-sectional view illustrating an internal structure of an electrolytic cell of the processing apparatus of FIG. 2 .
5 is an exploded perspective view of the electrolysis cell of FIG.
6 is a cross-sectional view showing a modified example of the electrolytic cell of the processing apparatus of FIG.
7 is an exploded perspective view of the electrolysis cell of FIG. 6 .
8 is a block diagram of an apparatus for treating pollutants according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a pollutant treatment method and a pollutant treatment apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 8 . First, a method for treating pollutants according to an embodiment of the present invention will be described in detail, and based on this, an apparatus for treating pollutants according to an embodiment and other embodiments of the present invention will be described in detail.

1 is a flowchart illustrating a pollutant processing method according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a pollutant processing apparatus according to an embodiment of the present invention capable of performing the processing method of FIG. 3 is a conceptual diagram illustrating the operating principle of the electrolysis cell of the processing apparatus of FIG. 2 .

1 to 3, in the method for treating contaminants according to the present invention, a first electrolytic solution containing metal ions and a second electrolytic solution containing hydroxide ions are generated through an electrolytic reaction, and metal ions of the first electrolytic solution are generated. and the hydroxide ions of the second electrolytic solution are separated and maintained, and then moved to different paths so that the metal ions and hydroxide ions do not mix and are supplied to the treatment tank (see 20 in FIG. 2 ). The metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution react in the treatment tank to generate metal hydroxide, and the generated metal hydroxide can be treated by aggregating contaminants in the treatment tank. That is, the contaminants are treated by agglomeration through the coagulation reaction, but the metal hydroxide that causes the coagulation reaction can be directly generated in the treatment tank so that the water treatment can be performed immediately. In this way, pollutants can be effectively removed by utilizing ions generated by the electrolytic reaction without receiving external supply of chemicals such as coagulant, and the electrolytic cell (refer to 10 in FIG. It is possible to prevent unnecessary contamination of electrodes and the like by remotely separating it from the treatment tank in which light is generated.

Referring to FIG. 1 , the pollutant treatment method of the present invention specifically includes the following steps. The contaminant treatment method is (a) disposing a metal electrode in the anode chamber of the electrolysis cell in which the anode chamber and the cathode chamber are separated, and proceeding with a water electrolysis reaction. generating an electrolytic solution, and generating a second electrolytic solution containing hydroxide ions in the cathode chamber, and maintaining the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution in the anode chamber and the cathode chamber, respectively. (S100), (b) supplying the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution to one treatment tank through different flow paths (S200), and (c) the first electrolysis in the treatment tank and reacting the metal ions of the solution with the hydroxide ions of the second electrolytic solution to generate a metal hydroxide, and aggregating and treating the contaminants in the treatment tank with the metal hydroxide (S300). According to an embodiment of the present invention, the anode chamber and the cathode chamber can be separated by a separator (see 13 in FIG. 2) that does not pass metal ions and hydroxide ions, and in step (a), the first electrolyte solution is transferred into the anode chamber. By supplying wastewater containing the contaminants of step (c), it can be produced through an electrolytic reaction of wastewater. In addition, in step (a), the second electrolytic solution is supplied to the cathode chamber at least one of the wastewater containing the contaminants of step (c) and the purified water discharged from the treatment tank to conduct an electrolytic reaction of at least one of the wastewater and the purified water can be created with

Such a pollutant treatment method may be performed, for example, by the pollutant treatment apparatus 1 as shown in FIG. 2 . The contaminant treatment apparatus 1 includes an electrolysis cell 10 in which an anode chamber 11 and a cathode chamber 12 are separated, a treatment tank 20 and an electrolysis cell 10 that are separately disposed from the electrolysis cell 10 . It may include different flow paths (first flow path 33 and second flow path 34) connecting the anode chamber 11 and the cathode chamber 12 of Each step of the pollutant treatment method can be performed. 2 is a block diagram showing an embodiment of the pollutant treatment apparatus 1, and each step of the above-described pollutant treatment method will be described in detail with reference to this, but a more detailed structure of the pollutant treatment apparatus 1 itself These will be described later in more detail.

First, as the first step of the contaminant treatment method, the metal electrode 110 is disposed in the anode chamber 11 of the electrolysis cell 10 in which the anode chamber 11 and the cathode chamber 12 are separated, and a water electrolysis reaction is performed. In the anode chamber 11, the metal electrode 110 is eluted to generate a first electrolyte solution containing metal ions, and in the cathode chamber 12, a second electrolyte solution containing hydroxide ions is generated, The metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution are separated and maintained in the anode chamber 11 and the cathode chamber 12, respectively (S100). As shown in FIG. 2 , the anode chamber 11 and the cathode chamber 12 may be separated by a separator 13 , and the separator 13 is formed from the metal ions generated in the anode chamber 11 and the cathode chamber 12 . It may be formed of a material that does not pass the generated hydroxide ions. Therefore, metal ions and hydroxide ions are maintained in each of the anode chamber 11 and the cathode chamber 12 , and may not cross-migrate through the separator 13 . The separation membrane 13 may be formed of various materials or structures that do not pass metal ions and hydroxide ions. For example, it is not necessary to be limited thereto, but it is possible to form an ion exchange membrane that passes only specific ions. . The separation membrane 13 is, for example, made of an ion exchange membrane, and the ion exchange membrane may include a cation exchange membrane that allows protons (or equivalently, hydrogen ions) to pass therethrough.

The anode and cathode of DC power are respectively applied to the anode chamber 11 and the cathode chamber 12 separated by the separator 13, respectively, and a water electrolysis reaction proceeds by the electric energy supplied accordingly. The potential difference generated between the anode chamber 11 and the cathode chamber 12 by the power source is, for example, 1 V or more. And by this potential difference, the anode chamber 11 can be maintained in an oxidizing atmosphere and the cathode chamber 12 in a reducing atmosphere. The metal electrode 110 is disposed in the anode chamber 11 to elute and discharge metal ions under an oxidizing atmosphere, and in the cathode chamber 12 , hydroxide ions may be ionized and generated under a reducing atmosphere. The metal electrode 110 in the anode chamber 11 is formed of a material containing at least one selected from aluminum and iron, and the metal hydroxide in the treatment tank 20 may include at least one selected from aluminum hydroxide and iron hydroxide. can That is, the metal electrode 110 is formed of a metal capable of generating a metal hydroxide capable of aggregating contaminants in the treatment tank 20 , and the metal may include aluminum and iron, and may include aluminum, iron, etc. It is not limited as long as possible, and may be in the form of an alloy. For example, the reaction proceeding in the electrolytic cell 10 based on the metal electrode 110 made of aluminum will be described in detail as follows.

Referring to FIG. 3 , the anode chamber 11 and the cathode chamber 12 in the electrolysis cell 10 are divided based on the separator 13 . Each of the anode chamber 11 and the cathode chamber 12 is filled with water for the electrolytic reaction. As described above, in the case of the anode chamber 11 , this water is wastewater containing contaminants, and the cathode chamber 12 . In this case, it may be composed of wastewater containing contaminants and/or purified water discharged from the treatment tank 20 . In the configuration shown in FIG. 2, wastewater is supplied to the anode chamber 11 and the cathode chamber 12, respectively. (12), purified water may be divided and supplied. In either case, the water electrolysis reaction proceeds without any problem, and in particular, it is possible to at least partially treat the wastewater by electrooxidation in an oxidizing atmosphere in the anode chamber 11 by supplying the wastewater to the anode chamber 11 . The anode chamber 11 may be configured in at least two different shapes. For example, as shown in FIG. 3 (a), a separate positive electrode 111 to which the anode of the DC power is applied is disposed and the metal electrode 110 is disposed. ) may be disposed separately, or the anode of a DC power source may be directly applied to the metal electrode 110 to use the metal electrode 110 instead of the positive electrode 111 as shown in FIG. 3(b). The negative electrode 120 to which the negative electrode of DC power is applied is disposed in the cathode chamber 12 to form a circuit between the metal electrode 110 and the negative electrode 120 or the positive electrode 111 and the negative electrode 120. there is. The metal electrode 110 and the positive electrode 111 and the negative electrode 120 separately disposed may be formed of a non-consumable electrode, which will be described later in detail.

Accordingly, the expected reaction equations of the anode chamber 11 and the cathode chamber 12 may be as follows.

[Formula 1] (Anode chamber reaction)

Al → Al ³⁺ + 3e ^-

2H ₂ O → O ₂ + 4H ⁺ + 4e ^-

[Formula 2] (cathode chamber reaction)

4H ₂ O + 4e ^- → 2H ₂ + 4OH ^-

That is, as shown in FIG. 3 , in the anode chamber 11 , aluminum ions, which are metal cations, are generated together with hydrogen ions by an electrolytic reaction, and oxygen gas is discharged. In the cathode chamber 12, hydroxide ions are generated by an electrolytic reaction. produced and hydrogen gas is emitted. The anode chamber 11 and the cathode chamber 12 are partitioned by the above-described separator 13, and the metal ions and hydroxide ions do not cross-migrate through them, so they do not mix with each other and the anode chamber 11 and the cathode chamber ( 12) are kept separate from each other. Accordingly, a first electrolyte solution containing metal ions is generated in the anode chamber 11 , and a second electrolyte solution containing hydroxide ions is generated in the cathode chamber 12 . The separator 13 is, for example, formed as a cation exchange membrane to move hydrogen ions to the cathode chamber 12, thereby maintaining and controlling the concentration gradient of hydrogen ions between the anode chamber 11 and the cathode chamber 12. can play a role As described above, the first electrolytic solution can be generated by an electrolytic reaction of wastewater by supplying wastewater (refer to A of FIG. 2) containing contaminants to the anode chamber 11, and the second electrolytic solution is the cathode chamber 12 ) by supplying at least one of wastewater containing contaminants (refer to A in FIG. 2) and purified water (refer to C in FIG. 8) discharged from the aforementioned treatment tank (refer to 20 in FIG. 2) to supply at least one of wastewater and purified water It can be produced by any one of the electrolytic reactions. In this way, in each of the anode chamber 11 and the cathode chamber 12, a first electrolyte solution containing metal ions and a second electrolyte solution containing hydroxide ions may be generated, and the metal ions and hydroxide ions may be separated from each other and maintained. .

Thereafter, the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution are respectively supplied to one treatment tank through different flow paths (S200). The metal ions may be supplied to the treatment tank 20 through the first flow path 33 , and the hydroxide ions may be supplied to the treatment tank 20 through the second flow path 34 independent of the first flow path 33 . For example, metal ions may be mixed with the first transport liquid transported from the anode chamber 11 to the treatment tank 20 along the first flow path 33 and supplied to the treatment tank 20 , and hydroxide ions may be It may be mixed with the second transport liquid transported from the cathode chamber 12 to the treatment tank 20 along the second flow path 34 and supplied to the treatment tank 20 . At this time, the first transport liquid contains metal ions generated in the anode chamber 11 and the second transport liquid contains hydroxide ions generated in the cathode chamber 12, and some metal ions and In the case of movement of other ions other than hydroxide ions through the separation membrane 13, even if they are not generated in the anode chamber 11 or the cathode chamber 12, they are present in the anode chamber 11 or the cathode chamber 12 during transport. It may further include other ingredients.

That is, as shown in FIG. 2 , the first transport liquid B1 containing metal ions generated in the anode chamber 11 through the first flow path 33 connected between the anode chamber 11 and the treatment tank 20 . ) and can supply metal ions to the treatment tank 20 , and the hydroxide ions generated in the cathode chamber 12 through the second flow path 34 connected between the cathode chamber 12 and the treatment tank 20 . The included second transport liquid B2 may be moved and hydroxide ions may be supplied to the treatment tank 20 . Since the first flow path 33 and the second flow path 34 are formed as different flow paths independent of each other, metal ions and hydroxide ions may be supplied to one treatment tank 20 without mixing with each other along each flow path. The first flow path 33 and the second flow path 34 can be formed in various structures capable of flowing a fluid mixed with ions and the like, and are not necessarily limited to the shape of a pipe or the like. If necessary, they are separated from each other to form various types of flow path structures capable of transporting metal ions and hydroxide ions through mutually independent paths. The first flow path 33 and the second flow path 34 may be implemented in various ways depending on the structure or shape of the device and the place where they are installed. As described above, the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution made in the electrolytic cell 10 are supplied to one treatment tank 20 through different independent flow paths.

Thereafter, in the treatment tank 20 , metal ions of the first electrolyte solution and hydroxide ions of the second electrolyte solution react to generate metal hydroxide, and contaminants in the treatment tank 20 are aggregated with the metal hydroxide and treated (S300) ). The treatment tank 20 is a structure in which a treatment space 20a capable of accommodating a fluid and performing a reaction is formed therein, and may be formed in various shapes ranging from a container shape to a structure such as a large-capacity water tank. Accordingly, the drawings are exemplary only and need not be so limited. The treatment tank 20 may be connected to the first flow path 33 and the second flow path 34 described above, and internally process the first transport liquid B1 and the second transport liquid B2 supplied through them, respectively. It can be accommodated together in the space (20a). Therefore, in the treatment tank 20 , the metal ions transported by the first transport solution B1 and the hydroxide ions transported by the second transport fluid B2 may react to form a metal hydroxide. As described above, the metal hydroxide is a material capable of treating contaminants in the treatment tank 20 by agglomeration, and may include aluminum hydroxide, iron hydroxide, and the like.

Contaminants in the treatment tank 20 may be, for example, contained in wastewater supplied to one or more selected from the anode chamber 11 and the cathode chamber 12 . That is, wastewater containing contaminants is supplied to at least one selected from the anode chamber 11 and the cathode chamber 12 , and at least a portion of the contaminants is a first transport fluid B1 and/or a second transport fluid In the state included in (B2), it is supplied to the treatment tank 20 capable of treating wastewater, etc., and may be aggregated and treated by the metal hydroxide in the treatment tank 20 . These contaminants are not limited as long as they can be coagulated by metal hydroxide, but may be, for example, various dyes, surfactants, difficult-to-decompose organic compounds such as phenolic compounds, heavy metal cations such as copper and zinc, cyanide, etc. . If necessary, it is also possible to introduce wastewater through another path through another flow path in the treatment tank 20 and configure it to be treated with metal hydroxide as well.

The metal hydroxide generated in the treatment tank 20 may agglomerate contaminants during the treatment process to form a precipitate (D). A drain pipe 210 for discharging the sediment D may be formed in the lower portion of the treatment tank 20 , and may be removed by discharging the sediment D and the like through the drain pipe 210 . The purified water C remaining after the contaminants are aggregated and removed may be discharged from the treatment tank 20 through the purified water discharge pipe 35 or the like. The purified water (C) discharged to the purified water discharge pipe (35) may be supplied to a treatment facility that performs a post-treatment process, etc., or may be supplied to other facilities requiring purified water (C). In addition, as described later, at least a portion of the discharged purified water C may be supplied to the cathode chamber 12 of the electrolysis cell 10 to form a second electrolytic solution. In this way, metal hydroxide is generated in the treatment tank 20 separated from the electrolysis cell 10 to proceed with water treatment, and the purified water (C) generated through this can be reused or supplied to a required place. can be used

On the other hand, pollutants may also be treated by an oxidation reaction occurring during the water electrolysis reaction or an oxidation reaction by an oxidizing agent (oxidizing agent) generated during the water electrolysis reaction. That is, contaminants can be treated by oxidation reaction in addition to agglomeration. For example, contaminants such as organic pollutants and ammonia nitrogen are adsorbed on the surface of the anode and are oxidized by the anode electron transfer reaction, or oxidizing agents (e.g., free radicals, O ₂ , oxidized metals generated during the water electrolysis reaction) It can be oxidized and decomposed by ions, HClO in chlorine-containing wastewater, etc.). This oxidation reaction works together with agglomeration so that contaminants can be treated more effectively.

Hereinafter, an apparatus for treating pollutants according to an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 7 along with FIG. 2 .

4 is a cross-sectional view showing the internal structure of the electrolytic cell of the processing apparatus of FIG. 2, FIG. 5 is an exploded perspective view of the electrolytic cell of FIG. 4, and FIG. 6 is a modified example of the electrolytic cell of the processing apparatus of FIG. It is a cross-sectional view, and FIG. 7 is an exploded perspective view of the electrolytic cell of FIG.

Referring to FIG. 2 , the pollutant treatment apparatus 1 of the present invention is specifically configured as follows. The pollutant treatment apparatus 1 includes an anode chamber 11 and a cathode chamber 12 that are partitioned and separated from each other, a separator 13 disposed between the anode chamber 11 and the cathode chamber 12 , and an anode Including the metal electrode 110 located in the chamber 11, the metal electrode 110 is eluted in the anode chamber 11 due to the water electrolysis reaction to generate a first electrolyte solution containing the generated metal ions, and the cathode chamber In (12), a second electrolytic solution containing hydroxide ions is generated, and the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution are separated and maintained in the anode chamber 11 and the cathode chamber 12, respectively. The electrolytic cell 10, the treatment tank 20 located outside the electrolytic cell 10 and having a treatment space 20a therein, and the treatment tank 20 and the anode chamber 11 of the electrolytic cell 10 are connected a first flow path 33 for supplying the metal ions of the first electrolytic solution generated in the anode chamber 11 to the treatment tank 20 , and the treatment tank 20 and the cathode chamber 12 of the electrolysis cell 10 . The metal of the first electrolyte solution in the treatment tank 20 includes a second flow path 34 connected therebetween to supply hydroxide ions of the second electrolyte solution generated in the cathode chamber 12 to the treatment tank 20 By reacting the ions with the hydroxide ions of the second electrolytic solution, a metal hydroxide that aggregates contaminants in the treatment tank 20 may be generated. In one embodiment of the present invention, the pollutant treatment device 1 further includes a first inlet pipe 31 for introducing the pollutant-containing wastewater into the anode chamber 11 of the electrolysis cell 10, The first electrolytic solution may be generated by the electrolytic reaction. In addition, the pollutant treatment device 1 includes a second inlet pipe 32 for introducing wastewater containing pollutants into the cathode chamber 12 of the electrolysis cell 10 , and purified water discharged from the treatment tank 20 ( C) may further include at least any one of circulation pipes for circulating the cathode chamber 12, so that the second electrolyte solution may be generated by an electrolytic reaction of at least any one of wastewater and purified water. Hereinafter, through an embodiment of the present invention, the first inlet pipe 31 and the second inlet pipe 32 are formed to introduce wastewater into the anode chamber 11 and the cathode chamber 12, respectively. and the configuration in which the circulation pipe (see 36 of FIG. 8) is formed will be described through another embodiment.

As described above, the contaminant treatment apparatus 1 of the present invention is a configuration capable of performing the above-described contaminant treatment method, and the overall operation and the anode chamber 11, the cathode chamber 12, the electrolysis cell 10, etc. The basic description is substantially equivalent to that described in the above-mentioned pollutant treatment method. In addition, since the description of the treatment tank 20, the first flow path 33, the second flow path 34, and related parts has also been described in the above-described pollutant treatment method, a repeated explanation of the overlapping parts will be omitted. , will be described in more detail with respect to the specific structure and implementation form of the electrolytic cell 10 not previously described.

First, referring to FIG. 2 , the electrolytic cell 10 includes an anode chamber 11 and a cathode chamber 12 separated from each other and a separator 13 disposed between the anode chamber 11 and the cathode chamber 12 , respectively. , and a metal electrode 110 positioned in the anode chamber 11 . The separation membrane 13 is composed of an ion exchange membrane that does not pass the aforementioned metal ions and hydroxide ions, and as described above, the metal ions of the first electrolyte solution and the hydroxide ions of the second electrolyte solution are transferred to the anode chamber 11 and the cathode chamber 12 ) can be maintained separately from each other. The electrolytic cell 10 applies DC power through the power supply unit 14, but as described above, a separate positive electrode 111 to which the anode of the DC power is applied is disposed and the metal electrode 110 may be disposed separately. In addition, it may be formed in a structure in which the metal electrode 110 is used instead of the positive electrode 111 by directly applying the anode of the DC power to the metal electrode 110 . That is, the electrolytic cell 10 is connected between the metal electrode 110 and the negative electrode 120 located in the cathode chamber 12 to induce a potential difference, or is separated from the metal electrode 110 in the anode chamber 11 . A power supply unit 14 connected between the formed positive electrode 111 and the negative electrode 120 to induce a potential difference may be further included. Hereinafter, an embodiment in which the positive electrode 111 is formed separately from the metal electrode 110 will be described in detail with reference to FIGS. 4 and 5 , and the metal electrode 110 without the positive electrode 111 without the positive electrode will be described with reference to FIGS. 6 and 7 . An implementation in place of (111) will be described in detail.

As shown in FIGS. 4 and 5 , the electrolytic cell 10 includes a plurality of plates in which an internal space 100a capable of accommodating at least one of a metal electrode 110 , a positive electrode 111 , and a negative electrode 120 is formed. It may further include a cell body 100 having a stacked structure formed by stacking a sieve. That is, the electrolytic cell 10 may be formed in a closed structure in which plate-shaped structures are stacked on each other, and through this structure, the electrolytic cell 10 that operates more compactly and efficiently may be realized. The cell body 100 may be disassembled, for example, as shown in FIG. 5 , and a first outer plate 101 , a second outer plate 102 , a first inner plate 103 , a second inner plate 104 , and a central plate ( 105), including a plurality of plate bodies. An inner space 100a may be formed inside each, and when the plates are stacked as shown in FIG. 4 , the inner space 100a in the cell body 100 is continuously connected to the anode chamber 11 and the cathode chamber 12, respectively. ) can be formed. For example, the positive electrode 111 and the negative electrode 120 may be respectively disposed in the inner space 100a of the first outer plate 101 and the second outer plate 102 , and the inner space 100a of the central plate 105 . ), the metal electrode 110 may be disposed. In addition, in the inner space 100a of the second inner plate 104 , a separator 13 for shielding is disposed across it, and as shown in FIG. 4 , the anode chamber 11 and the cathode chamber 12 based on the separator 13 . ) can be divided inside the electrolytic cell 10 to implement a partitioned structure. As shown in FIG. 5 , the metal electrode 110 is disposed in the inner space 100a of the central plate 105 and is structured so as not to completely close the space, so that the first outer plate 101 and the first inner plate 103 are substantially formed. , it is possible to implement a structure in which the inner spaces 100a of the central plate 105 communicate with each other to form the anode chamber 11 . In addition, it is possible to implement a structure in which the inner spaces of the second inner plate 104 and the second outer plate 102 communicate with each other to form the cathode chamber 12 . The metal electrode 110 may be formed in various shapes, such as a rod shape and a plate shape, for example, and may be formed in another shape or structure, such as a structure in which metal pellets are introduced into a non-conductive mesh body, etc. . The metal electrode 110 can be deformed into various shapes within the limit capable of eluting metal ions in the anode chamber 11 .

By forming a plurality of plate bodies in a stacked structure in this way, the anode chamber 11 and the cathode chamber 12 can be maintained more closely, and the distance between the positive electrode 111 and the negative electrode 120 to which power is applied can be further reduced. there is. That is, by forming a relatively wide plate-shaped electrode structure in the plate structure and narrowing the gap between them, for example, the density of the electric field can be increased, and the electrolytic reaction can proceed more effectively. In addition, the size and spacing of the anode chamber 11 and the cathode chamber 12 can be appropriately changed in a manner such as adding or subtracting the number of laminated plate bodies or changing the thickness of the plate body as needed. It is also possible to apply the pollutant treatment device to various spaces. A sealing hole 100d surrounding the inner space 100a is formed in a portion where the plate bodies are in contact with each other, and a sealing member (not shown) such as an O-ring in the sealing hole 100d is inserted to prevent leakage of the internal fluid. In addition, each plate body may be firmly coupled to each other in such a way that, for example, a plurality of through-holes connected to each other are formed, and a coupling member or the like is coupled through each through-hole.

Circuits for allowing a fluid to flow along surfaces may be formed in the first inner plate 103 forming the anode chamber 11 and the second inner plate 104 forming the cathode chamber 12 , respectively. For example, as shown in FIG. 5 , an inlet circuit 100b and an exhaust circuit 100c may be formed on a surface opposite to the first outer plate 101 on the first inner plate 103, and the second inner plate ( The inlet circuit 100b and the outlet circuit 100c may be formed on the surface opposite to the second outer plate 102 in the 104 . In addition, as shown in FIGS. 4 and 5 , the first outer plate 101 and the second outer plate 102 have an inlet 100b2 connected to the inlet circuit 100b and an outlet 100c2 connected to the outlet circuit 100c, respectively. ) is formed to introduce a fluid from the outside through the inlet (100b2), pass through the inside of the electrolysis cell 10, and exit to the outside through the outlet (100c2) can be formed in the cell flow path structure. The inlet circuit 100b and the outlet circuit 100c may be formed, for example, in the same shape as a plurality of lines connected to the inner space 100a, and are connected at positions corresponding to the inlet 100b2 and the outlet 100c2, respectively. Since the grooves 100b1 and 100c1 are formed, the fluid can be formed in a structure in which the fluid can be collected in the connection grooves 100b1 and 100c1 and flow more easily through the inlet 100b2 and the outlet 100c2. As an example of the direction in which the fluid flows inside the cell, the fluid L1 flowing into the anode chamber (refer to 11 in FIG. 4) as shown in FIG. 5 passes through the inlet 100b2 under the first outer plate 101. It flows in and passes through the inner space 100a through the inlet circuit 100b formed in the first inner plate 103 at a position opposite thereto, and then faces it through the discharge circuit 100c at the top of the first inner plate 103 It can move to the outlet 100c2 of the first outer plate 101 to be escaped. In addition, the fluid L2 flowing into the cathode chamber (see 12 in FIG. 4 ) is symmetrically introduced through the inlet 100b2 under the second outer plate 102 , and the second inner plate 104 is positioned opposite to it. ) through the inner space 100a through the inlet circuit 100b formed in the second inner plate 104 and through the outlet circuit 100c on the upper part of the second inner plate 104 to the outlet 100c2 of the second outer plate 102 opposite thereto. so you can get out In this way, it is possible to implement a structure in which the fluid enters and exits independently of each of the anode chamber 11 and the cathode chamber 12 .

The inlet 100b2 of the first outer plate 101 may be connected to the first inlet pipe 31 described above, and the outlet 100c2 may be connected to the first flow path 33 described above. In addition, the inlet 100b2 of the second outer plate 102 may be connected to the above-described second inlet pipe 32 , and the outlet 100c2 may be connected to the above-described second flow path 34 . Therefore, after the wastewater as described above is supplied to the anode chamber 11 through the first inlet pipe 31 , it is generated as a first electrolyte solution and discharged to the first flow path 33 , and is discharged through the second inlet pipe 32 . After the wastewater is supplied to the cathode chamber 12, it is discharged to the second flow path 34 generated as the second electrolyte solution, and the above-described contaminant treatment process may be performed. As described above, when the positive electrode 111 and the metal electrode 110 are separated from each other, the metal electrode 110 is formed as a consumable electrode capable of eluting metal ions, and the positive electrode 111 and the negative electrode 120 are not It can be formed as a consumable electrode. The metal electrode 110 may be formed of a material including aluminum and iron as described above, and the non-consumable electrode need not be limited thereto, but for example, a titanium electrode, a carbon electrode, and a dimensionally stable anode (DSA). ) electrode, BDD (Boron doped diamond) electrode, and can be formed of various electrodes including a platinum electrode. The positive electrode 111 and the negative electrode 120 are disposed in close contact with the first outer plate 101 and the second outer plate 102, respectively, and the connecting portions to which the anode and the cathode of the DC power are applied are, for example, the first outer plate, respectively. By configuring it to pass through 101 and the second outer plate 102 to the outside, unnecessary structures in the anode chamber 11 and the cathode chamber 12 can be eliminated and a more compact structure can be implemented.

On the other hand, the electrolytic cell 10 may be transformed into a shape as shown in FIGS. 6 and 7 . In such a case, the positive electrode 111 may be replaced by disposing the metal electrode 110 in the corresponding position without forming the above-described positive electrode (see 111 in FIGS. 4 and 5 ). That is, the center plate (see 105 in FIGS. 4 and 5) of the cell body 100 is removed and the metal electrode 110 is placed in the inner space 100a of the first outer plate 101 to have the same shape as the positive electrode 111. can be configured and power can be applied. When formed in this way, the metal electrode 110 connected to the power source serves as the above-described positive electrode 111 and is generated by eluting metal ions. Other than that, since the remaining structures are substantially the same as the structures described with reference to FIGS. 4 and 5, a repeated description thereof will be omitted. In this way, the cell body 100 having a laminated structure formed by laminating a plurality of plate bodies may be formed, and the anode chamber 11 and the cathode chamber 12 may be partitioned therein to be separated from each other, and if necessary, the cell body 100 may be formed. The electrolytic cell 10 may be configured in various ways in which the metal electrode 110 and the positive electrode 111 separate from the anode chamber 11 are disposed, or the metal electrode 110 directly performs the role of the positive electrode 111 . can Since each of these structures includes the anode chamber 11 and the cathode chamber 12 separated from each other, the anode chamber 11 and the cathode chamber 12 according to an embodiment of the present invention as shown in FIG. ) can be connected to the first inlet pipe 31 and the second inlet pipe 32, respectively, and through this, wastewater A is supplied to each of the anode chamber 11 and the cathode chamber 12 and the electrolytic reaction can proceed. there is. Through this, as in the above-described contaminant treatment method, a first electrolyte solution and a second electrolyte solution are generated through the electrolytic reaction of wastewater, respectively, and metal ions of the first electrolyte solution and hydroxide ions of the second electrolyte solution are stored in the anode chamber 11 ) and the cathode chamber 12 are separated and maintained, and then, metal ions and hydroxide ions are supplied to the treatment tank 20 through the first flow passage 33 and the second flow passage 34, respectively, and the treatment tank 20 In this way, it is possible to implement the contaminant treatment apparatus 1 capable of smoothly performing the above-described contaminant treatment method.

Hereinafter, an apparatus for treating pollutants according to another embodiment of the present invention will be described in detail with reference to FIG. 8 . In order to make the description concise and clear, parts that are different from the above-described embodiment will be mainly described, and all descriptions of parts not mentioned separately will be replaced with the above description.

8 is a block diagram of an apparatus for treating pollutants according to another embodiment of the present invention.

Referring to FIG. 8 , in the pollutant treatment apparatus 1-1 according to another embodiment of the present invention, a circulation pipe 36 for circulating the purified water C discharged from the treatment tank 20 to the cathode chamber 12 . may include That is, instead of supplying wastewater to the cathode chamber 12 , purified water C purified from the treatment tank 20 may be supplied to generate a second electrolyte solution in the cathode chamber 12 through an electrolytic reaction of the purified water. For example, the circulation pipe 36 may be branched from the purified water discharge pipe 35 and connected to the cathode chamber 12 , for example, the second outer plate (102 in FIGS. 4 to 7 ) of the above-described electrolysis cell 10 . Reference) may be connected to the inlet (refer to 100b2 in FIGS. 4 to 7) formed on the side to supply purified water (C). By forming in this way, it is possible to additionally block the inflow of contaminants into the cathode chamber 12 and prevent unnecessary contamination of the electrode or the like. As described above, the second electrolytic solution containing hydroxide ions can be easily generated in the cathode chamber 12 by the electrolytic reaction of the purified water C, and the hydroxide ions of the second electrolytic solution are generated in the anode chamber 11 as described above. It is possible to supply the metal ions of the generated first electrolytic solution to one treatment tank 20 to generate a metal hydroxide in the treatment tank 20 and perform the above-described water treatment process.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: contaminant treatment device 10: electrolysis cell
11: anode chamber 12: cathode chamber
13: separator 14: power unit
20: treatment tank 20a: treatment space
31: first inflow pipe 32: second inflow pipe
33: 1st Euro 34: 2nd Euro
35: purified water discharge pipe 36: circulation pipe
100: cell body 100a: inner space
101: first outer plate 102: second outer plate
103: first inner plate 104: second inner plate
105: central plate 100b: inlet circuit
100b1, 100c1: connection groove 100b2: inlet
100c: exhaust circuit 100c2: exhaust port
100d: sealing hole 110: metal electrode
111: positive electrode 120: negative electrode
210: drain pipe A: wastewater
B1: First transport amount B2: Second transport amount
C: purified water D: sediment
L1, L2: fluid

Claims (13)

(a) A metal electrode is placed in the anode chamber of the electrolysis cell in which the anode chamber and the cathode chamber are separated, and a water electrolysis reaction is performed. In the cathode chamber, a second electrolyte solution containing hydroxide ions is generated to separate metal ions of the first electrolyte solution and hydroxide ions of the second electrolyte solution in the anode chamber and the cathode chamber, respectively. step;
(b) supplying the metal ions of the first electrolytic solution and the hydroxide ions of the second electrolytic solution to one treatment tank through different flow paths; and
(c) reacting the metal ions of the first electrolytic solution with the hydroxide ions of the second electrolytic solution in the treatment tank to produce a metal hydroxide, and agglomerate the contaminants in the treatment tank with the metal hydroxide to treat Contaminant treatment method comprising. According to claim 1,
The anode chamber and the cathode chamber are separated by a separator that does not pass the metal ions and the hydroxide ions. 3. The method of claim 2,
The separation membrane is made of an ion exchange membrane, and the ion exchange membrane is a pollutant treatment method comprising a cation exchange membrane through which protons pass. The method of claim 1,
In the step (a), the first electrolyte solution is a pollutant treatment method in which the wastewater containing the pollutants of the step (c) is supplied to the anode chamber and generated through an electrolytic reaction of the wastewater. 5. The method of claim 4,
In step (a), the second electrolyte solution supplies at least one of the wastewater containing the contaminants of step (c) and the purified water discharged from the treatment tank to the cathode chamber to supply at least one of the wastewater and the purified water. A method of treating pollutants generated by any one of the electrolytic reactions. The method of claim 1,
The metal electrode in the anode chamber is formed of a material containing at least one selected from aluminum and iron, and the metal hydroxide in the treatment tank includes at least one selected from aluminum hydroxide and iron hydroxide. anode chamber and cathode chamber separated from each other,
a separator disposed between the anode chamber and the cathode chamber; and
Including a metal electrode located in the anode chamber,
In the anode chamber, the metal electrode is eluted by the water electrolysis reaction to generate a first electrolyte solution containing the generated metal ions, and in the cathode chamber, a second electrolyte solution containing hydroxide ions is generated to produce the first electrolyte solution an electrolysis cell which separates and maintains metal ions and hydroxide ions of the second electrolytic solution in the anode chamber and the cathode chamber;
a treatment tank positioned outside the electrolysis cell and having a treatment space therein;
a first flow path connected between the treatment tank and the anode chamber of the electrolysis cell to supply metal ions of the first electrolyte solution generated in the anode chamber to the treatment tank; and
a second flow path connected between the treatment tank and the cathode chamber of the electrolysis cell to supply hydroxide ions of the second electrolytic solution generated in the cathode chamber to the treatment tank,
A contaminant treatment apparatus for generating metal hydroxide that aggregates contaminants in the treatment tank by reacting metal ions of the first electrolytic solution with hydroxide ions of the second electrolytic solution in the treatment tank. 8. The method of claim 7,
The separation membrane is composed of an ion exchange membrane that does not pass the metal ions and the hydroxide ions, and the metal ions of the first electrolyte solution and the hydroxide ions of the second electrolyte solution are separated and maintained in the anode chamber and the cathode chamber, respectively. pollutant treatment equipment. 8. The method of claim 7,
The electrolysis cell is connected between the metal electrode and the negative electrode located in the cathode chamber to induce a potential difference, or is connected between the positive electrode and the negative electrode formed separately from the metal electrode in the anode chamber to induce a potential difference. Further comprising a pollutant treatment device. 10. The method of claim 9,
The metal electrode is formed of a consumable electrode capable of eluting metal ions, and the positive electrode and the negative electrode are formed of a non-consumable electrode. 10. The method of claim 9,
The electrolytic cell may further include a cell body having a stacked structure formed by stacking a plurality of plate bodies having an internal space for accommodating at least one of the metal electrode, the positive electrode, and the negative electrode. 8. The method of claim 7,
The apparatus for treating pollutants further comprising a first inlet pipe for introducing pollutant-containing wastewater into the anode chamber of the electrolysis cell, thereby generating the first electrolytic solution through an electrolytic reaction of the wastewater. 13. The method of claim 12,
The wastewater and the purified water further comprising at least one of a second inlet pipe for introducing wastewater containing contaminants into the cathode chamber of the electrolysis cell, and a circulation pipe for circulating purified water discharged from the treatment tank into the cathode chamber A contaminant treatment device for generating the second electrolytic solution by at least one electrolytic reaction.

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