KR101784299B1 - Electrolysis device and wastewater treatment method using the device - Google Patents

Abstract

The present invention relates to an MES tank having an electrolytic unit formed by alternately disposing a plurality of positive electrode plates and a negative electrode plate, a micro bubble generating unit formed at a lower end of the MES tank and generating micro bubbles, an inlet port through which the wastewater flows into the MES tank, And a discharge port through which waste water purified in the MES tank is discharged. The inlet is formed at a lower end of the microbubble device to increase the mixing ratio of the waste water flowing into the MES tank and the microbubbles generated in the microbubble device Wherein the outlet is formed on both sides of the MES bath and is formed in a direction extending perpendicularly to a side of the MES bath and connected to the bottom of at least one outlet of the plurality of outlets, A part of the wastewater purified in the micro bubble device and the electrolysis part is introduced into the lower part of the MES bath Further comprising an electrolytic water treatment method using the electrolytic water treatment device, characterized in this, and to the circulator for circulating.

Description

[0001] The present invention relates to an electrolytic wastewater treatment apparatus and a wastewater treatment method using the same,

The present invention relates to an apparatus for purifying contaminated wastewater due to mixing of harmful substances over a certain level, and an apparatus and a method for simultaneously performing a purification reaction of a microbubble with an electrolysis method which has been carried out.

There are two ways to treat wastewater: physical treatment and chemical treatment. The physical treatment is usually carried out by precipitation or filtration, and the chemical treatment is carried out in the form of a redox reaction, a neutralization reaction or an exchange of ionized ions.

One of the commercially available chemical treatment methods and environmentally friendly technologies, electrolysis decomposes contaminants through anodic oxidation and indirect oxidation directly on the anode surface.

The hydroxide ion (OH-) generated by the electrolysis of water is converted from the surface of the negative electrode to the hydroxyl radical (HO) after the electron exchange, decomposes the contaminants, and the chloride ion (Cl-) in the aqueous solution is converted from chlorine molecule , Hypochlorous acid (HOCl) and hypochlorite ion (OCl-) generated by electrolysis again decompose the contaminants and purify the water.

However, as concerns about water shortages and ecosystem destruction are increasing day by day, water quality improvement technologies require more advanced technologies and economic considerations.

In addition, environmental improvement due to the effect on the ecosystem due to the regulation of the outflow limit, which is gradually strengthened, and the water quality is required to be economical as well as environmentally friendly.

Korean Patent No. 10-1644275 ("Electrolysis Apparatus and Water Treatment Method Using the Same")

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a device capable of simultaneously performing an electrolysis method used for purifying wastewater and a physical purification method using a micro bubble device And a wastewater treatment system.

The present invention relates to an MES tank having an electrolytic unit formed by alternately disposing a plurality of positive electrode plates and a negative electrode plate, a micro bubble generating unit formed at a lower end of the MES tank and generating micro bubbles, an inlet port through which the wastewater flows into the MES tank, And a discharge port through which waste water purified in the MES tank is discharged. The inlet is formed at a lower end of the microbubble device to increase the mixing ratio of the waste water flowing into the MES tank and the microbubbles generated in the microbubble device Wherein the outlet is formed on both sides of the MES bath and is formed in a direction extending perpendicularly to a side of the MES bath and connected to the bottom of at least one outlet of the plurality of outlets, A part of the wastewater purified in the micro bubble device and the electrolysis part is introduced into the lower part of the MES bath It characterized in that it further comprises a circulator for circulating.

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The circulation device is characterized in that the purified water in the upper portion of the MES bath flows into the lower end of the microbubble device and is circulated.

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Further comprising one or more sensors provided in the MES tank for measuring the degree of contamination of the wastewater, wherein the microbubble device operates when the measured degree of contamination of the wastewater is greater than or equal to a predetermined reference value.

The method for treating wastewater using the electrolytic wastewater treatment apparatus according to claim 1, further comprising: a step of introducing the wastewater into which the wastewater flows into the treatment apparatus through the inlet; a step of cleaning the wastewater flowing into the apparatus A second purification step in which electrolysis is generated in the electrolysis part while rising bubbles, a discharge step in which the purified fluid is discharged to the outside through the discharge port, and a part of the purified fluid is discharged through the circulation device And a circulation step in which the microbubbles are circulated.

The electrolytic wastewater treatment apparatus according to the present invention can maximize the efficiency of the treatment apparatus by adding the micro bubble device outside the MES bath.

Particularly, phenol, which is frequently emitted from chemical plants, coke, and cetane factories, increased the treatment efficiency by about 25% compared to the case of purification only by electrolysis method. In the case of organic substances, about 30% .

In addition, the power can also be reduced by about 30% compared with the case where only the purification by the conventional electrolysis method is performed. This has the effect of reducing the power ratio as compared with the conventional wastewater treatment device.

In addition, the wastewater flowing into the purification process can be treated with a fluid having a higher cleanliness level while the purification process is performed twice, and a waste water treatment effect that does not easily decompose can be expected.

1 is a cross-sectional view of an electrolytic wastewater treatment apparatus according to an embodiment of the present invention.
2 is a plan view of an electrolytic wastewater treatment apparatus according to an embodiment of the present invention.
3 is an exemplary view showing the principle of a micro bubble generator provided in an electrolytic wastewater treatment apparatus according to an embodiment of the present invention.
4 is an exemplary view showing a wastewater moving path of an electrolytic wastewater treatment apparatus according to an embodiment of the present invention.
5 is an exemplary view of a wastewater treatment method using an electrolytic wastewater treatment apparatus according to an embodiment of the present invention.
6 is an exemplary view showing an electrolytic wastewater treatment apparatus according to another embodiment of the present invention.
7 is an exemplary view of a wastewater treatment method using an electrolytic wastewater treatment apparatus according to another embodiment of the present invention.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It should be understood that variations can be made.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the technical concept of the present invention, are incorporated in and constitute a part of the specification, and are not intended to limit the scope of the present invention.

≪ Example 1 >

FIG. 1 is a cross-sectional view of an electrolytic wastewater treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view showing an electrolytic wastewater treatment apparatus according to an embodiment of the present invention. As shown in the figure, the MES tank 110 includes an electrolytic unit 110 formed of a positive electrode plate 111 and a negative electrode plate 112 for performing electrolysis, a micro-bubble generating micro- A circulation device 500 for generating a micro bubble by flowing a part of the fluid purified through the electrolysis part 110 and the micro bubble device 200 into the micro bubble device 200 again, And is a device in which wastewater enters through an inlet 300 shown in the drawing and flows through a discharge port 400 through a purifying operation.

3 is a diagram illustrating the principle of a micro bubble generator provided in an electrolytic wastewater treatment apparatus according to an embodiment of the present invention. The bubble of fluid introduced through the circulator 500 is supplied to the micro bubble generator 200 are rotated in the tube by the propeller 220 provided therein to form a vortex. And the vortex is collapsed to form the micro bubble.

The micro bubble is a bubble having a diameter of 50 탆 or less. Generally, the bubble that is formed rises at a high speed in water, but the micro bubble has a slow buoyancy because it is smaller in buoyancy than normal bubbles. Normal bubbles burst on the water surface, but the microbubbles dissolve in water and disappear before reaching the water surface. This is according to the Navier-Stokes law. As the diameter of the bubbles becomes smaller, the rising speed slows down, and the dissolved oxygen is increased because the oxygen stays in water for a long time.

In addition, surface tension acts on the microbubble at the bubble interface. Since the surface tension acts to form a small surface, the surface tension of the bubble having the spherical interface acts as a force for compressing the inside. The smaller the diameter in the theory of the Young-Laplace formula is, the higher it is formed. When the microbubbles disappear by the above-mentioned force, high temperature and high pressure ultrasonic waves and free radicals are generated, and the organic substances in the wastewater are decomposed and the virus is sterilized.

In addition, the micro bubbles rise up while adsorbing organic materials having a positive charge by negatively charging the interface, so that some contaminants in the wastewater can be purified before reaching the electrolysis unit 110.

FIG. 4 is a view illustrating an example of a wastewater moving path of an electrolytic wastewater treatment apparatus according to an embodiment of the present invention. Wastewater flows from the inlet 300 and is primarily purified through the micro bubble generator 200 And is purified through the electrolytic unit 110 composed of a plurality of the positive electrode plates 111 and the negative electrode plates 112 and discharged to the outside through the discharge port 400 And a portion of the purified fluid enters the microbubble device 200 again through the circulation device 500 to produce the microbubble.

The circulation device 500 may include a pump or a valve to prevent backflow of the fluid.

FIG. 5 is a view illustrating an example of a method of treating wastewater using an electrolytic wastewater treatment apparatus according to an embodiment of the present invention.

When the microbubble device 200 enters the microbubble device 200 through the inflow of wastewater through the inlet port 300, the microbubble device 200 generates microbubbles to allow the organs to stay A first purification step (S120) for generating ultrasonic waves and free radicals is performed. Thereafter, in the electrolysis unit 110 provided in the MES tank 100, the secondary purification step (S 130) by the oxidation-reduction reaction is performed, and the fluid subjected to the two purification steps (S 120 and S 130) Is discharged through the discharge port 400 through the discharge step S140 or is recycled to the microbubble device 200 formed at the lower end of the MES tank 100 by the circulation device 500, (S150) is performed.

≪ Example 2 >

6 is a view illustrating an electrolytic wastewater treatment apparatus according to another embodiment of the present invention. In the MES bath 100, at least one sensor 600 is provided to clean the inside of the MES bath 100, The microbubbing device 200 stops the operation of the microbubble device 200 when the COD concentration value of the microbubble device 200 is lower than a predetermined value. This is advantageous in that power consumption can be reduced in a situation in which the micro bubble generator 200 is not needed, and it is possible to provide a better power saving effect than the above embodiment.

FIG. 7 is a view illustrating a method of treating wastewater using an electrolytic wastewater treatment apparatus according to another embodiment of the present invention.

5 of the wastewater treatment method according to an embodiment of the present invention, when the sensor 600 formed in the MES tank 100 detects a COD value of a certain concentration or less, the first purification step S120 It is possible to observe the flow of the fluid immediately after the second purification step (S130).

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: MES bath 110: electrolysis unit
111: Positive electrode plate 112: Negative electrode plate
200: micro bubble device 210: bubble jet nozzle
220: Propeller
300: inlet
400: outlet
500: circulation device
600: Sensor

Claims (8)

An MES bath (100) having an electrolytic unit (110) formed by alternately disposing a plurality of positive and negative plates;
A micro bubble generator (200) formed at the lower end of the MES tank and generating a micro bubble;
The inlet 300, into which the wastewater flows into the MES bath 100,
The outlet (400) through which the purified wastewater is discharged from the MES tank (100)
Respectively,
The inlet 300 is formed at the lower end of the micro bubble generator 200 to increase the mixing ratio of the wastewater flowing into the MES tank 100 and the micro bubble generated in the micro bubble generator 200, Physical decomposition efficiency is increased,
The discharge port 400 is formed on both sides of the MES tank 100 and extends in a direction perpendicular to the side surface of the MES tank 100,
A portion of the wastewater purified by the micro bubble generator 200 and the electrolysis unit 110 is connected to the lower portion of the outlet 400 of at least one of the plurality of outlets 400, Further comprising a circulation device (500) for circulating the electrolyzed wastewater to the electrolyzer.
delete The method according to claim 1,
Wherein the circulating unit (500) circulates the purified water above the MES tank (100) to the lower end of the microbubble generator (200).
delete delete delete The method of claim 3,
Further comprising at least one sensor (600) provided in the MES tank (100) and measuring the degree of contamination of the wastewater, wherein the microbubble device (200) is operated when the measured degree of contamination of the wastewater is greater than a predetermined reference value Wherein the electrolytic wastewater treatment apparatus comprises:
A wastewater treatment method using the electrolytic wastewater treatment apparatus according to any one of claims 1, 3, and 7,
A wastewater inflow step (S110) in which the wastewater flows into the processing apparatus through the inlet (300);
A first purification step (S120) of purifying the wastewater introduced into the apparatus by the micro bubble generated in the micro bubble generator (200);
A secondary purification step (S130) in which electrolysis is generated in the electrolysis unit (110) while bubbles rise;
A discharging step S140 of discharging the purified fluid through the outlet 400; And
Circulating a portion of the purified fluid through the circulation device 500 to the microbubble device 200 (S150);
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