KR101071113B1 - Electrolysis apparatus - Google Patents

Abstract

The present invention relates to an electrolysis device, the configuration of which is introduced to the inflow water from the outside through the inlet pipe to generate a swirl flow to equalize the pressure and flow rate, and to prevent the precipitation through the uniform mixing of the suspended matter Tank; A partition wall having a plurality of guide holes opened in an arc shape so that the inflow water introduced into the buffer tank is uniformly supplied to the upper portion; An external electrode coupled to an outer protrusion formed on an upper portion of the barrier rib, the external electrode flowing inflow water from a buffer tank; And an inner electrode coupled to an inner protrusion formed on an upper portion of the partition wall, and configured to discharge the inflow water passing through the outer electrode to the outside through a discharge tube connected to the buffer tank, wherein the outer electrode and the inner electrode each have a polarity. An electrical reaction is formed in the influent flowed in the state to separate phosphorus from the influent, and irregularities are formed on the outer circumferential surface of the internal electrode to correspond to the surface area of the external electrode.

Description

Electrolysis Apparatus {Electrolysis Apparatus}

The present invention relates to an electrolysis device, and more particularly, it is possible to uniformize the pressure and flow rate in the buffer tank, to induce swirl flow of the influent to prevent mixing and sedimentation of solids, and It relates to an electrolysis device that can induce the flow of fluid between the anode and the cathode to be a vertical upward laminar flow, thereby uniformly reacting the entire area of the electrode so that corrosion (wear) of the electrode is uniformly formed, thereby extending the life of the electrode. .

In water bodies such as rivers, coastal waters, and lakes, eutrophication occurs when nutrients such as phosphorus increase. The eutrophication activates the production of nutrient-containing organisms to change the ecosystem of nature, causes red tide in the sea, and causes abnormal growth of algae and the like in the lake.

This process proceeds smoothly in the natural world, but when large amounts of sewage, livestock manure, industrial wastewater, etc. are introduced, the nutrients are excessively increased, and as a result, the mass breeding of algae loses its value as a water resource. And eutrophication is rapidly progressing, and if it is severe, odor is caused by decay and water pollution is promoted. Therefore, nutrients in sewage water should be removed before they enter the lake or rivers, and many studies have been made to efficiently remove them.

In Korea, most sewage treatments rely on activated sludge methods. Treatment with activated sludge can remove most suspended solids and organic matter, but only 10-20% of nutrients such as phosphorus are treated. Therefore, the final purpose of sewage treatment for water protection is gradually focused on the removal of phosphorus, and it is urgent to develop a process in accordance with the water quality regulations to be strengthened in the future.
Conventional processes for phosphorus treatment include physicochemical treatment and biological treatment. Existing nutrient treatment method adds nutrient removal facility to the facility to remove biochemical oxygen demand (BOD) and suspended matter (SS). As a result, it is an uneconomical way of increasing the size of the installation by several times. These processes are different from current activated sludge processes and require nutrients to be rebuilt and replaced in place of existing facilities. Methods for treating phosphorus compounds require phosphorus release to release phosphorus in microorganisms in the anaerobic state in vitro and an aerobic state of overdose of phosphorus. In order to process phosphorus, both the aerobic and anaerobic anaerobic conditions listed above must be provided. Existing methods treat each reactor by dividing each reactor by hydraulic retention time.

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In addition, as a method for removing phosphorus, an electrolysis method is used. The electrolysis method comprises a positive electrode and a negative electrode respectively in a treatment apparatus for receiving wastewater, and when current is supplied to the wastewater, the metal ions emitted from each electrode are discharged. Phosphorus is removed by reacting with phosphorus in sewage and flocculation.

This method has a small installation size, but sediment generated by electrolysis accumulates in the processing apparatus and needs to be treated separately. Also, due to the cross-installation of the anode and cathode, the flow characteristics become uneven and the electrode is unevenly corroded. There is a problem that the reaction efficiency and life is shortened. In addition, when the plate-shaped electrode is used, the resulting solids are deposited on the lower portion of the electrolysis device, so that the efficiency is lowered, and a device necessary for removing the deposits must be attached.

In addition, there is a problem in that reproducibility of solid-liquid separation efficiency is inferior due to uneven mixing and non-uniform size of sediment produced and uneven sedimentation characteristics.

In addition, there is a problem that the electrolytic efficiency is lowered as the contaminants are attached to the surface of the electrode plate by the cross-installation of the plate-shaped anode and cathode.

The present invention has been made to solve the above problems, the object of the present invention can be uniform pressure and flow rate in the buffer tank and induce the swirl flow of the influent can prevent the mixing and sedimentation of solids, Electrolysis that induces the flow of the fluid between the electrode and the electrode (anode and cathode) to be vertically rising laminar flow to uniformly react the entire area of the electrode, resulting in uniform corrosion (wear) of the electrode, thus extending the life of the electrode. In providing a device.

It is also an object of the present invention to provide an electrolysis device that can generate hydrogen and oxygen gas on the surface of the anode and cathode to prevent the precipitate from being deposited by attaching to the hydrogen and oxygen gas.

It is also an object of the present invention to provide an electrolysis device capable of making electrode corrosion uniform by switching the polarity of the positive electrode and the negative electrode from time to time, thereby extending the life of the electrode.

It is also an object of the present invention to provide an electrolysis device that can actively adjust the voltage and current according to the phosphorus concentration of the sewage water to actively cope with the phosphorus concentration of the influent.

In addition, the object of the present invention is to have the electrode surface is cleaned efficiency by the laminar flow of the influent water to prevent the degradation of efficiency due to the electrode surface contamination and to induce the reaction to occur uniformly through the electrode area to prevent the electrode corrosion of the electrode The present invention provides an electrolysis device capable of preventing shortening of life.

In addition, an object of the present invention is to provide an electrolysis device that can maximize the utilization as an electrode by maximizing the surface area with the external electrode by forming irregularities on the outer peripheral surface of the inner electrode.

The present invention has the following structure in order to achieve the above object.

The electrolysis device of the present invention, the inflow water from the outside through the inlet pipe to generate a swirl flow to equalize the pressure and flow rate, to prevent the precipitation through the uniform mixing of the suspended matter; A partition wall having a plurality of guide holes opened in an arc shape so that the inflow water introduced into the buffer tank is uniformly supplied to the upper portion; An external electrode coupled to an outer protrusion formed on an upper portion of the barrier rib, the external electrode flowing inflow water from a buffer tank; And an inner electrode coupled to an inner protrusion formed on an upper portion of the partition wall, and configured to discharge the inflow water passing through the outer electrode to the outside through a discharge tube connected to the buffer tank, wherein the outer electrode and the inner electrode each have a polarity. An electrical reaction is formed in the influent flowed in the state to separate phosphorus from the influent, and irregularities are formed on the outer circumferential surface of the internal electrode to correspond to the surface area of the external electrode.

The external electrode is preferably formed to have a thicker thickness from the top to the bottom.

And if the external electrode and the internal electrode is one of the cathode and the other is the anode, it is preferable that the external electrode and the internal electrode is often switched polarity.

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The external electrode and the internal electrode may be made of any one selected from iron (Fe) or aluminum (Al).

In addition, the external electrode and the internal electrode is preferably provided detachably from the buffer tank.

And it is preferable to further include a filter for filtering the suspended matter from the inlet water on the inlet side.

And the electrolysis device is preferably provided with means for agglomerating and solid-liquid separated phosphorus separated from the discharged influent.

And the means is preferably a mixing device and an M / F solid-liquid separator.

According to the present invention, the pressure and the flow rate can be made uniform in the buffer tank, and the inflow of inflow water can be induced to prevent mixing and settling of solids, and the flow of fluid between the electrodes and the electrodes (anode and cathode) is vertical. By inducing the laminar flow to uniformly react the entire area of the electrode, corrosion (wear) of the electrode is uniformly formed, thereby increasing the life of the electrode.

In addition, according to the present invention, it is possible to uniformly corrode the electrodes by frequently switching the polarity of the positive electrode and the negative electrode, thereby extending the life of the electrode.

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In addition, according to the present invention, the electrode surface has a cleaning efficiency by the laminar flow of the influent water to prevent the decrease in efficiency due to contamination of the electrode surface and to induce the reaction uniformly through the electrode area to prevent the electrode corrosion by preventing the electrode It is effective to prevent shortening of life.

In addition, according to the present invention, by forming the irregularities on the outer peripheral surface of the inner electrode to have the same surface area with the outer electrode can maximize the utilization as an electrode and there is an expected effect to maximize the electrical reaction.

1 is an exploded perspective view showing an electrolysis device of the present invention.
2 is a cross-sectional view showing an external electrode shown in FIG.
3 is a cross-sectional view showing the buffer tank shown in FIG.
4 is a plan view showing the buffer tank shown in FIG.
Figure 5 is a schematic diagram showing the operating state of the phosphorus removal device using electrolysis according to the present invention.
6 and 7 are graphs showing a state in which the influent according to the present invention is induced.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. These embodiments are provided to explain in detail the present invention to those skilled in the art. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a more clear description.

As shown in FIG. 1, the electrolysis device of the present invention includes a buffer tank 110, an inner electrode 120, and an outer electrode 130.

The buffer tank 110 is provided with an inlet pipe 112 for introducing the inlet water to the space 111 formed inside from the outside and a discharge tube 113 for discharging the inlet water to the outside. The inflow pipe 112 is located on the outer circumferential surface of the buffer tank 110 so that the inflow water can be swung in the space as shown in Figure 3 when the inflow into the space, the discharge pipe 113 Has a "b" shape that is bent upward from the side. In addition, the upper part of the buffer tank is formed with a partition wall 115, and a plurality of guide holes 116 are opened in the partition wall 115 so that the inflow water introduced into the buffer tank can be uniformly guided upward.

The outer protrusion 118 surrounding the outer peripheral surface of the partition wall 115 is formed, the inner protrusion 117 is formed inside the outer protrusion 118, and the center of the inner protrusion 117 is opened so that the above-described discharge pipe is formed. 113 is inserted and coupled.

The inner electrode 120 has a tube shape in which both ends of the circumference are open, and the uneven surface 121 is formed in the vertical direction on the outer circumferential surface to increase the surface area. The increase in surface area of the inner electrode through the unevenness of the inner electrode is to further promote the reaction of the influent by matching the surface area of the inner electrode with the outer electrode.

The external electrode 130 has a form in which one side of the circumference is open and the other side is blocked. Here, as shown in FIG. 2, the external electrode 130 is preferably formed to have a thicker thickness from the top to the bottom. This is because the influent flowing into the buffer tank reacts with the external electrode and the internal electrode to separate the phosphorus contained in the influent. At this time, when the surface of the external electrode is worn out, the surface of the external electrode near the induction hole wears out more quickly. In order to extend the life of the electrode, the thickness of the lower side is made thicker to induce uniform wear of the external electrode surface.

In this case, the buffer tank prevents current from flowing using a nonmetal material, and the internal electrode and the external electrode use a metal material to allow current to flow. In addition, if one of the internal electrode and the external electrode is an anode, the other has a cathode, and the polarity of the internal electrode and the external electrode is changed from time to time. The inner electrode and the outer electrode are made of any one selected from iron (Fe) or aluminum (Al). The polarity of the internal electrode and the external electrode may be switched from time to time, but the external electrode is preferably a positive electrode (+) and the internal electrode is a negative electrode (−). This is because only the external electrode is reacted to wear out from the influent, thereby reducing the cost of replacing the electrode.

In addition, in the present invention, the inner peripheral surface of the buffer tank, the inner electrode and the outer electrode has a cylindrical shape, but the inner peripheral surface may have each shape as long as the inflow water allows laminar flow.

On the other hand, as shown in Figure 4 it is possible to maximize the inflow of water in the buffer tank by arranging a plurality of inlet pipes facing each other on the outer peripheral surface of the buffer tank.

In the coupling relationship of the present invention, first, the inlet pipe 111 is coupled to one side of the outer circumferential surface of the buffer tank 110, and the “b” shaped discharge tube 113 protrudes horizontally from the center of the buffer tank circumference. The upper bent portion is coupled so as to face upward from the circumferential center so as to penetrate through the center of the upper partition wall.

Next, the flange 130 is coupled to the lower portion of the buffer tank 110 by using a bolt (not shown) to block the inside of the buffer tank.

Next, the inner electrode 120 is inserted and coupled to surround the outer circumferential surface of the inner protrusion 117 formed on the partition wall, and the outer electrode 130 is inserted and coupled to the inner circumferential surface of the outer protrusion 118 formed on the upper partition wall. At this time, the inner electrode and the outer electrode is preferably provided with a packing between the outer projection and the inner projection to prevent leakage.

In addition, the external electrode 130 is in communication with the space 111 through the inlet hole 123, the internal electrode 120 is connected to the discharge tube 113 coupled to the partition wall inflow water introduced into the inlet tube buffer It is guided along the pipeline leading from the inner space of the tank to the discharge tube and reacts and can be discharged to the discharge tube side.

Hereinafter, an operating state of the present invention will be described with reference to FIG. 2.

Referring to FIG. 5, inflow water is introduced from the outside through the inflow pipe 112. At this time, through the filter 140 disposed on the inlet pipe 112 side to filter the suspended matter contained in the influent water to reduce the foreign body feeling of the influent to facilitate the influent reaction through the external electrode and the internal electrode, buffer tank It can reduce the floating inside.

Inflow of inflow water is freshened in the space 111 of the buffer tank 110 and at the same time, it is swiveled in the space to generate an upward flow so that the precipitate reacted in the inflow water first introduced does not settle in the buffer tank.

Next, the inflow of fresh water in the space portion is raised by the swirl flow and is guided to the induction hole 116 formed at the upper side, and the guided inflow is uniformly arranged along the partition wall so as to flow into the inner surface side of the external electrode 130 uniformly. Will be.

Next, the inflow water introduced into the external electrode 130 is reacted by the internal electrode 120 and the external electrode 130. In this case, the electrical reaction with the external electrode is performed by the irregularities formed on the surface of the internal electrode as described above. It is possible to promote the reaction by correspondingly, and to thicken the lower side of the external electrode to make the wear of the upper and lower parts of the external electrode uniform as much as the reaction at the bottom due to the reaction characteristics. This can reduce electrode maintenance costs.

On the other hand, by applying a current to the external electrode 130 and the internal electrode 120, the electrical reaction formula of the external electrode and the internal electrode is as follows.

In case of anode

Using the Fe ^{electrode: Fe (s) → Fe 3+} + 3e -

Al using the ^{electrode: Al (s) → Al 3+} + 3e -

2H ₂ 0 → 4H ⁺ + O ² + 4e

* Cathode *

^{_{2H 2 O + 2e - → 2OH}} - + H 2

Using the Fe ^{electrode: Fe 3+ + 3e - → Fe} (s)

Al using the ^{electrode: Al 3+ + 3e - → Al} (s)

The external electrode and the internal electrode which are electrically reacted by the reaction scheme react with phosphorus (P) contained in the influent, wherein the reaction formula is as follows.

Al ³⁺ + PO ₄ ^3- → AlPO ₄ ↓

Fe ³⁺ + PO ₄ ^3- → FePO ₄ ↓

Phosphorus reacted with iron or aluminum, as shown in the above scheme, produces a precipitate (A), and the generated precipitate is included in the influent, wherein the influent (W) is a swirl flow and an external electrode generated when moving from the buffer tank to the external electrode. Since the laminar flow from the inside flows into the inner electrode like the inflow water and is discharged to the outside through the discharge tube, it is possible to prevent the precipitate from being deposited and stacked in the buffer tank and the electrode.

On the other hand, the external electrode and the internal electrode generate hydrogen and oxygen gas on the surface by the above-described reaction formula to prevent the reacted phosphorus from adhering to the surface of the external electrode and the inner electrode, and the reacted phosphorus is hydrogen and oxygen Attached to the gas to form a reactant of a certain size to facilitate the movement according to the flow of the influent.

That is, since the precipitate formed by the electrolysis is discharged by moving to the discharge tube in a state rich in the influent water, sedimentation of sediment does not occur inside the electrolysis device, thereby extending the life of the electrolysis device.

In addition, since the external electrode and the internal electrode is a material for electrolytic reaction with phosphorus contained in the influent, it is preferable that the external electrode and the internal electrode be configured to be detachable since they need to be replaced after a certain period of time. It is possible to extend the life as an electrode by abrasion.

Next, the influent discharged from the electrolysis unit contains phosphorus, so it must be removed from the influent.

Therefore, it is preferable to connect the mixing apparatus 200 capable of agglomerating phosphorus at the discharge tube end, and it is preferable to continuously arrange the M / F solid-liquid separator 300 for classifying and discharging the agglomerated phosphorus and influent. desirable.

Meanwhile, in the M / F solid-liquid separator, it is preferable to treat the concentration of phosphorus separated to 0.2 mg / L or less.

As described above, when the external electrode and the internal electrode are electrodes, when the inflow water containing phosphorus passes through the external electrode and the internal electrode, the phosphorus contained in the inflow water is electrolytically reacted by the external electrode and the internal electrode as electrodes to inflow into the solid form. The reactant becomes suspended. Floating sediment is naturally generated by the flow rate flowing from the buffer tank to the external electrode prevents the sediment is settled inside the electrolysis device to prevent the shortening of the life of the electrolysis device due to sedimentation.

6 and 7 illustrate that the inflow water induced along the induction hole according to the present invention rises with an electrical reaction, and it can be seen that the inflow water flows uniformly inside the external electrode by the induction hole. Therefore, the inner surface of the external electrode is uniformly worn through the electrolysis reaction according to the present invention, thereby extending the life of the external electrode.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

Claims (9)

A buffer tank for introducing inflow water from the outside through the inflow pipe to generate swirl flow to uniformize pressure and flow rate, and to prevent precipitation through uniform mixing of suspended solids;
A partition wall having a plurality of guide holes opened in an arc shape so that the inflow water introduced into the buffer tank is uniformly supplied to the upper portion;
An external electrode coupled to an outer protrusion formed on an upper portion of the barrier rib, the external electrode flowing inflow water from a buffer tank; And
And an internal electrode coupled to an inner protrusion formed on the partition wall, and configured to discharge the inflow water passing through the external electrode to the outside through a discharge tube connected to the buffer tank.
The outer electrode and the inner electrode each have a polarity to form an electrolysis reaction in the influent flowing in to separate the phosphorus from the inlet, and the inner surface of the inner electrode is formed with irregularities to correspond to the surface area with the outer electrode Electrolysis device characterized in that.
The method of claim 1,
The external electrode is characterized in that the thickness is gradually formed from the top to the bottom gradually thicker.
The method of claim 1,
The outer electrode and the inner electrode is one of the cathode, the other one is an anode, the outer electrode and the inner electrode electrolysis device, characterized in that the polarity is often switched.
delete The method of claim 3, wherein
The external electrode and the internal electrode of the electrolysis device, characterized in that made of any one selected from iron (Fe) or aluminum (Al).
The method of claim 5, wherein
The external electrode and the internal electrode is characterized in that the electrolytic device is provided detachably from the buffer tank.
The method of claim 1,
The inlet side is characterized in that it further comprises a filter for filtering the suspended matter from the influent water.
The electrolysis device according to any one of claims 1 to 3 or 5 to 7, wherein the electrolysis device is provided with means for agglomerating and solid-liquid separation of phosphorus separated from discharged influent water. Device.
The method of claim 8,
Said means being a mixing device and an M / F solid-liquid separator.

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