KR20160093218A - Apparatus and method for removing contaminants using hydrogen peroxide and under water plazma dischare - Google Patents

Apparatus and method for removing contaminants using hydrogen peroxide and under water plazma dischare Download PDF

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Publication number
KR20160093218A
KR20160093218A KR1020150013935A KR20150013935A KR20160093218A KR 20160093218 A KR20160093218 A KR 20160093218A KR 1020150013935 A KR1020150013935 A KR 1020150013935A KR 20150013935 A KR20150013935 A KR 20150013935A KR 20160093218 A KR20160093218 A KR 20160093218A
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KR
South Korea
Prior art keywords
hydrogen peroxide
reactor
raw water
reaction
generated
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KR1020150013935A
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Korean (ko)
Inventor
이승환
손건태
이홍신
Original Assignee
금오공과대학교 산학협력단
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Priority to KR1020150013935A priority Critical patent/KR20160093218A/en
Publication of KR20160093218A publication Critical patent/KR20160093218A/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/4608—Treatment of water, waste water, or sewage by electrochemical methods using electrical discharges
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46152—Electrodes characterised by the shape or form
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

Disclosed are an apparatus and a method for removing contaminants using hydrogen peroxide and underwater plasma discharge. The apparatus for removing contaminants removes contaminants included in raw water by simultaneously using oxidizers and hydroxyl radicals through injecting hydrogen peroxide in a plasma reaction using a copper electrode with respect to the raw water, wherein the oxidizers are generated by the plasma reaction and the hydroxyl radicals are generated by reacting copper ions generated by the hydrogen peroxide and the plasma reaction.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for removing pollutants using hydrogen peroxide and underwater plasma discharge,

The present invention relates to a pollutant removal device and a removal method, and more particularly, to a pollutant removal device and a removal method using hydrogen peroxide and a copper electrode-based underwater plasma discharge.

Contaminants such as various wastewater and the like include a large amount of organic pollutants. One of the methods for removing such organic pollutants is to use a plasma discharge. A method for removing contaminants using a plasma discharge is to remove contaminants through various active oxidizers produced by underwater plasma discharge. It is known that such an underwater plasma discharge technique can effectively remove organic pollutants by producing various active oxidizing agents (such as ozone and hydroxyl radicals). However, the plasma discharge technique currently used has a disadvantage of requiring a high maintenance cost because it requires high energy.

Korean Patent Publication No. 2011-0041874

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a pollutant removal device and a removal method that can effectively remove pollutants.

Other objects of the present invention will become more apparent through the embodiments described below.

An apparatus for removing contaminants according to an aspect of the present invention is a device for removing contaminants by adding hydrogen peroxide to a plasma reaction using a copper electrode for raw water and an oxidizing agent generated by a reaction of the plasma itself and a copper ion generated by a hydrogen peroxide and a plasma reaction And the generated hydroxyl radicals are simultaneously used to remove contaminants contained in the raw water.

The pollutant removing apparatus according to the present invention may include one or more of the following embodiments. For example, a reactor in which a plasma reaction using a copper electrode is generated, and a power supply unit for supplying power to the reactor, and the reactor is charged with raw water and hydrogen peroxide.

The reactor includes a ground electrode and the copper electrode connected to the power supply.

The reactor may have electrode protrusions into which the copper electrodes are interchangeably inserted.

The copper electrode can be inserted into the ceramic tube.

According to an aspect of the present invention, there is provided a method for removing contaminants, comprising the steps of: inputting hydrogen peroxide into raw water; inducing a copper electrode-based plasma reaction on the raw water by applying power to oxidize the oxidants generated by the reaction of the plasma itself; And simultaneously removing the contaminants contained in the raw water by simultaneously using hydroxyl radicals generated by the combination of copper ions and hydrogen peroxide.

The method of removing contaminants according to the present invention may include various embodiments. For example, raw water and hydrogen peroxide may be introduced into a reactor, and a plasma reaction using a copper electrode may be generated inside the reactor.

The pollutant removing device and the removing method according to the present invention are characterized in that the oxidizing agents generated by the reaction of the plasma itself and the hydroxyl radicals generated by the reaction of copper ions and hydrogen peroxide generated by the copper electrode- The pollutants contained in the raw water can be effectively removed.

1 is a view illustrating an apparatus for removing contaminants according to an embodiment of the present invention.
2 is a view illustrating a reactor in the pollutant removal apparatus illustrated in FIG.
Figure 3 is a diagram illustrating an electrode in the reactor illustrated in Figure 2;
4 is a graph showing changes in concentration of copper ions in water due to underwater plasma discharge.
Figure 5 is a flow chart illustrating a method for removing contaminants in accordance with one embodiment of the present invention.
6 is a graph showing the methylene blue removal rate by hydrogen peroxide and a copper electrode-based underwater plasma bonding process.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout the specification and claims. The description will be omitted.

Hereinafter, a pollutant removing apparatus 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG.

1 is a view illustrating a pollutant removal apparatus 100 according to an embodiment of the present invention, and FIG. 2 is a view illustrating a reactor 110 in the pollutant removal apparatus 100 illustrated in FIG. And Figure 3 is an illustration of an electrode 120 in the reactor 110 illustrated in Figure 2.

1 to 3, a pollutant removing apparatus 100 according to an embodiment of the present invention includes a reactor 110 and a power supply unit 150. [ Hydrogen peroxide is added to the reactor 110 in order to flow raw water and further increase the treatment efficiency by the plasma discharge.

The pollutant removing apparatus 100 according to the present embodiment simultaneously uses the oxidizing agents generated by the reaction of the plasma itself and the hydroxyl radicals generated by the combination of the copper electrode-based underwater plasma and the hydrogen peroxide, Because the material is removed, the pollutant can be efficiently treated while using less energy.

The reactor 110 includes a cylindrical body 112 having an inlet 114 through which raw water and hydrogen peroxide are introduced and an outlet 116 through which the treated water is discharged to the other end. In addition, the reactor 110 can be formed of an acrylic material having a transparent characteristic, and thus the plasma discharge generated in the reactor 110 can be visually observed.

A plurality of electrode protrusions 118 protrude from the periphery of the reactor 110. An electrode 120 is interchangeably inserted into the electrode protrusion 118 so that one end of the electrode protrudes into the reactor 110. The reactor 110 according to the present embodiment has four electrodes 120 arranged at regular intervals. However, the present invention is limited to the number of the electrodes 120 inserted in the reactor 110, It does not.

A ground electrode 130 is provided in the reactor 110 together with the electrode 120.

The electrode 120 is connected to a power supply 150 to allow a plasma reaction to be generated within the reactor 110. The electrode 120 used in the reactor 110 according to the present embodiment has a copper material and generates dissolved copper ions (Cu 2 + ) by underwater plasma reaction.

Referring to FIG. 3, the electrodes 120 are inserted into the ceramic tube 122 to prevent leakage, and the ceramic tube 122 concentrates the plasma without dispersing the plasma, thereby improving the process efficiency. One end of the ceramic tube 122 is located inside the reactor 110 with a shielded structure. The other end 121 of the ceramic tube 122 may have an open structure and may be electrically connected to the power supply device 150.

The power supply device 150 applies a high voltage to the electrode 120, and can include a transformer to increase the voltage. A high-voltage channel and a grounding channel, which are connected to the electrode 120, are provided on the rear surface of the power supply unit 150 to generate plasma in the reactor 110. In addition, an electric power meter (not shown) is installed on the front surface of the power source device 150 to calculate electric power required for plasma discharge.

Hydrogen peroxide may be introduced into the reactor 110 by a charging device (not shown). The hydrogen peroxide feed unit injects hydrogen peroxide into the reactor 110 together with the raw water or before the plasma reaction occurs after the raw water is supplied.

A pump (not shown) may be coupled to the reactor 110 to cause the treated water treated by the plasma reaction to be repeatedly introduced into the reactor 110 together with the raw water. As described above, the treated wastewater is introduced into the reactor 110 again by using the pump, so that the pollutant can be reliably removed.

The hydrogen peroxide introduced into the reactor 110 generates hydroxide radicals (OH) by the Fenton-like reaction with the copper ions generated by the underwater plasma reaction of the copper electrode 120. It is possible to effectively remove the refractory pollutants contained in the raw water by the hydroxyl radicals. Plasma also acts to promote the reaction of copper ions with hydrogen peroxide by supplying reactive energy.

4 is a graph showing changes in concentration of copper ions in water with time underwater plasma discharge. Referring to FIG. 4, it can be seen that the concentration of copper ion in water generated by the underwater plasma reaction using the copper electrode is increased. The copper ions generated by the plasma reaction react with hydrogen peroxide in water to generate hydroxyl radicals. The reaction can be confirmed by the following equation.

Cu (II) + H 2 O 2 ? Cu (I) + HO 2 - + H +

HO 2 - ? O 2 - + H + (pK a = 4.8)

Cu (II) + O 2 · - (or HO 2 -)? Cu (I) + O 2 ( or O 2 + H +)

Cu (I) + H 2 O 2 ? Cu (II) + OH + OH - (or Cu (III) + 2OH - )

In the water, the plasma serves to supply energy for the reaction of copper ions and hydrogen peroxide, and the copper ion acts as a catalyst to increase the generation of hydroxyl radicals in hydrogen peroxide.

Oxygen (O), ozone (O 3 ), and OH radicals are generated in the water by the reaction of the plasma itself in the reactor 110, which has a stronger oxidizing power than the normal oxidizing agent. These OH radicals oxidize and remove various inorganic and organic pollutants contained in the raw water.

As described above, the pollutant removing apparatus according to the present embodiment can remove pollutants contained in the raw water by simultaneously using hydroxyl radicals generated by a combination of copper ions and hydrogen peroxide, as well as various oxidants generated by the plasma reaction itself Can be effectively removed. The pollutant removal apparatus according to the present embodiment can treat seawater, sewage, membrane filtration, reverse osmosis (RO) concentrated water, and the like.

Figure 5 is a flow chart illustrating a method for removing contaminants in accordance with one embodiment of the present invention.

Referring to FIG. 5, the method of removing contaminants according to the present embodiment includes the steps of supplying hydrogen peroxide to raw water, inducing a copper electrode-based plasma reaction on raw water by applying power, Removing the contaminants contained in the raw water by simultaneously using hydroxide radicals generated by the combination of copper ions and hydrogen peroxide, and supplying the treated water with the contaminants to the reactor 110 again with the raw water .

The treated water treated with the pollutant may be discharged to the outside, but if the treatment level of the pollutant is less than expected, the treated water is returned to the inside of the reactor 110 together with the raw water. At this time, hydrogen peroxide is injected into the reactor 110 before a plasma reaction occurs.

6 is a graph showing the relationship between the concentration of methylene blue (MBH (Methylene Blue Hydrate)) as one of the organic dyes in the case of using only the copper electrode-based plasma discharge generated at 800 V for about 2 minutes and the case of using hydrogen peroxide and the copper electrode- .

Referring to FIG. 6, it can be seen that methylene blue can be removed more effectively when hydrogen peroxide and a copper electrode-based plasma reaction are used at the same time as in the case of using only a plasma discharge. In addition, it can be seen that the higher the amount of hydrogen peroxide introduced, the more effectively the methylene blue can be removed.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100: Contaminant removal device
110: Reactor 112: Body
114: inlet 116: outlet
118: electrode protrusion 120: electrode
122: ceramic tube 130: ground electrode
150: Power supply

Claims (7)

By adding hydrogen peroxide to the plasma reaction using the copper electrode for the raw water, the oxidizing agents generated by the reaction of the plasma itself and the hydrogen radicals generated by the reaction of hydrogen peroxide and the copper ions generated by the plasma reaction are used simultaneously in the raw water Contaminant removal equipment to remove contaminants included. The method according to claim 1,
A reactor for generating a plasma reaction using the copper electrode;
And a power supply for supplying power to the reactor,
Wherein the reactor is charged with raw water and hydrogen peroxide. 3. The method of claim 2,
Wherein the reactor comprises a ground electrode and the copper electrode connected to the power supply. The method of claim 3,
Wherein the reactor comprises electrode protrusions into which the copper electrode is replaceably inserted. 5. The method according to any one of claims 3 and 4,
Wherein the copper electrode is inserted into the ceramic tube. Introducing hydrogen peroxide into the raw water; And
By applying a power source to induce the copper electrode-based plasma reaction on the raw water, the oxidizing agents generated by the reaction of the plasma itself and the hydroxide radicals generated by the combination of copper ions and hydrogen peroxide are simultaneously used to remove contamination And removing the material. The method according to claim 6,
Wherein the raw water and the hydrogen peroxide are introduced into the reactor, and a plasma reaction using the copper electrode is generated inside the reactor.
KR1020150013935A 2015-01-29 2015-01-29 Apparatus and method for removing contaminants using hydrogen peroxide and under water plazma dischare KR20160093218A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110041874A (en) 2009-10-16 2011-04-22 한국기계연구원 Plasma reactor for abatement of hazardous material and driving method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110041874A (en) 2009-10-16 2011-04-22 한국기계연구원 Plasma reactor for abatement of hazardous material and driving method thereof

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