KR102315114B1 - Plasma reactor for water treatment - Google Patents

Abstract

The present invention relates to a plasma reactor for water treatment, wherein an electrode module is installed inside a stainless steel reaction tank having an inlet and an outlet so that the water to be treated can move to decompose organic matter present in the water to be treated or to remove microorganisms. Of course, it is provided with a relatively simple configuration so that sterilization, deodorization, and decomposition effects can be expected, and it is possible to prevent loss of functionality by preventing scale from occurring on the surface of the reactor and electrode module.
That is, the present invention includes a stainless steel cylindrical reactor configured with an inlet at the lower side and an outlet at the upper side so that the water to be treated can move; a stopper screwed to be watertight through a screw hole opened at an upper portion of the reactor; an electrode module coupled to the stopper and positioned in the center of the reactor; It is configured to include a DC generator electrically connected to supply power to the reactor and the electrode module.

Description

Plasma reactor for water treatment

The present invention relates to a plasma reactor for water treatment, and more particularly, by installing an electrode module inside a stainless steel reaction tank having an inlet and an outlet so that the water to be treated can move, to decompose organic matter or microorganisms present in the water to be treated. To provide a plasma reactor for water treatment that prevents the loss of functionality by preventing scale from occurring on the surface of the reactor and electrode module while providing a relatively simple configuration so that sterilization, deodorization, and decomposition effects can be expected as well as removing will do

Various technologies for treating contaminants or harmful microorganisms in the water to be treated are provided. Conventionally, a treatment method using chemicals has been mainly used, but recently, due to environmental pollution, etc., by applying a high voltage pulse to the electrode and discharging it, Techniques for treating water to be treated by generating active radicals have been provided.

However, in the case of the above method, since the electrode for generating the discharge is in a state immersed in water, the electricity applied to the electrode is energized through the water to be treated, so that plasma generation is not easy, so there are many problems in practical application, Among the various active ingredients generated by plasma, such as radicals, ions, and ozone, radicals and ions have the advantage of very high reaction activity, but since their lifespan is very short, there is a problem in that if they are not contacted with water immediately after they are generated, their activity will be lost soon. .

As a prior art for solving this problem, a wastewater treatment apparatus and a wastewater treatment method using a plasma-membrane of Republic of Korea Patent Publication No. (B1)10-1579349 (December 22, 2015) are provided, and the configuration of the wastewater immersed reactor; a hydrophobic ceramic membrane immersed in the reactor to form a hollow therein, and having a plurality of pores; a gas inlet connected to one side of the reactor and communicating with the hollow part through which gas is introduced; and a plasma discharge unit inserted into the hollow part and generating an electric discharge to activate the introduced gas; containing, wherein the activated gas is supplied into the wastewater through the pores, and the activated gas is immediately dispersed into water through the pores formed in the ceramic membrane to minimize the loss of the activated gas, and to minimize the loss of activated gas and liquid By maximizing the contact area, the reaction rate is fast and organic pollutants and microorganisms in the water can be improved.

As another example, a plasma electrode for water treatment, a plasma electrode module, and a water treatment system including the same are proposed in Korean Patent Publication No. (B1)10-2044024 (2019.11.12.), the configuration of which is a ground part having a cylindrical shape, It has a multi-stage structure in which the fixing part and the discharge part are sequentially stacked, the ground part is in contact with the electrode, plasma is generated in the discharge part, and the ground part, the fixing part and the discharge part are made of the same material of SUS to have corrosion resistance. It has an integrated structure, the diameter of the discharge part located at the upper part is the shortest, the diameter of the ground part located at the lower part is the longest, and the diameter of the discharge part exceeds 1 mm and is less than 4 mm. This is the effect that the distance between the ground electrode and the plasma nozzle provided in the reactor can be easily adjusted, and the plasma can be stably generated by using the three-stage integrated plasma nozzle, thereby improving the treatment efficiency of the water to be treated. However, there are problems such as the structure of the electrode module is complicated, and scale is generated on the surface of the battery electrode and electrode module in the process of treating the treated water, so that the functionality is reduced or the surface is worn. There were limits.

KR 101579349 B1 2015.12.22. KR 102044024 B1 2019.11.12.

Accordingly, the present inventor has researched and developed the present invention in order to improve the complex configuration of the conventional plasma reactor and also to improve the problem of functional deterioration due to scale regeneration.

In other words, in the present invention, an electrode module is installed inside a reaction tank of stainless steel configuration that is provided with an inlet and an outlet so that the water to be treated can move, and (-) power is supplied to the reaction tank and (+) power is provided to the electrode module to prevent plasma generation. However, the electrode module covers the outside of the electrode rod with a ceramic or glass tube and forms a coating layer on the outside, and forms a spiral protrusion inside the reaction tank so that the to-be-treated water moving inside the reaction tank moves in a vortex, The present invention has been completed with the technical task of the invention in order to continuously decompose or remove organic matter and microorganisms present in the water to be treated by providing a continuous plasma reaction without scale generation on the surface of the electrode module.

In the present invention as a means to solve the problem,

First, a cylindrical reactor having an inlet at the lower side and an outlet at the upper side so that the water to be treated can move; a stopper screwed to be watertight through a screw hole opened at an upper portion of the reactor; an electrode module coupled to the stopper and positioned in the center of the reactor; It is characterized in that it is configured to include a DC generator electrically connected to supply power to the reactor and the electrode module.

Second, the electrode module but vertically coupled the electrode to the stopper; The electrode is characterized in that an insulating tube is covered under the screw portion of the side coupled to the screw hole, and a ceramic tube or glass tube is covered under the insulating tube exposed to the water to be treated so that a plasma reaction can be performed.

Third, it is characterized in that a coating layer coated with any one of diamond, metal, and ceramic by thermal spraying is formed on the inner surface of the reactor and the surface of the ceramic tube or glass tube covered on the electrode.

Fourth, the inlet and outlet are formed in a tangential shape away from the center of the reaction tank, and a spiral protrusion is formed on the inner surface of the reaction tank so that the water to be treated is vortexed.

Fifth, a bubble generator to which oxygen is supplied is further installed at the inlet side so that oxygen can be additionally supplied to the water to be treated publicly supplied to the inlet.

When using the plasma reactor for water treatment provided in the present invention has the following effects.

Since the plasma underwater reaction is performed in a state where the electrode is positioned in the axial direction inside the tubular reactor, it is possible to effectively decompose or remove organic matter and microorganisms present in the water to be treated.

In addition, the present invention is a configuration in which a coating layer coated with any one of diamond, metal, and ceramic is formed on the inner surface of the reactor and the surface of the ceramic tube or glass tube covered with the electrode, and a spiral protrusion is formed on the inner surface of the reactor to vortex the treated water. Because it is a movable configuration, it is possible to prevent scale from occurring in the process of plasma treatment of the water to be treated, and to generate a sufficient amount of OH radicals only through stable plasma generation, so that continuous treatment of the water to be treated can be performed without fear of loss of functionality of the plasma reactor. it will be possible

When used for water treatment, it is possible to treat water without chemicals, thereby reducing environmental pollution, and it is also expected to have the effect of low-cost treatment of contaminated water due to its strong sterilization, deodorization and decomposition effects.

1 is a perspective view showing a preferred embodiment of a plasma reactor for water treatment provided by the present invention;
2 is an exploded perspective view of a plasma reactor for water treatment provided by the present invention;
3 is a cross-sectional view of FIG.
4 is a cross-sectional view showing a state in which another embodiment of the reactor is applied to the present invention;
5 is a plan sectional view of FIG. 4
6 is an enlarged cross-sectional view showing the configuration of an electrode module applied to the present invention;

Hereinafter, a preferred embodiment of the plasma reactor for water treatment provided in the present invention will be described based on the accompanying drawings.

1 is a perspective view showing a preferred embodiment of the plasma reactor for water treatment provided in the present invention, Figure 2 is an exploded perspective view of the plasma reactor for water treatment provided in the present invention, Figure 3 is a cross-sectional view of Figure 1 did it

The plasma reactor 1 for water treatment provided in the present invention supplies power to the reactor 2, the electrode module 3 coupled to the reactor 2, and the reactor 2 and the electrode module 3 as shown. It is largely divided into a direct current generator (4) to provide.

The reaction tank 2 is made of a stainless material, and is provided in a pipe shape with a closed lower part and an open upper part, and a screw hole 21 is formed in the open side.

An inlet 22 through which the treated water is introduced is formed at the lower end of the reaction tank 2, and an outlet 23 through which the treated water is discharged is formed at the upper end of the reaction tank 2, and these are used to control the water to be treated or treated. A valve 24 may be installed.

Although air, such as oxygen, is partially dissolved in the water to be treated supplied to the inlet 22, the amount of dissolved oxygen may be increased by mixing air as necessary. For example, by further installing a bubble generator 25 to which oxygen is supplied to the inlet 22 side, oxygen may be additionally supplied to the water to be treated that is supplied to the inlet 22 .

When the bubble generator 25 to which oxygen is supplied is installed at the inlet 22 side as described above, when the water to be treated flows into the reactor 2, the amount of oxygen dissolved in the water to be treated increases. When the plasma reaction occurs, ozone (O3) and radicals (OH) can be generated more easily.

The inner surface of the reaction tank 2 is subjected to an interface with the water to be treated, and by coating the inner surface that is in surface contact with the water to be treated to form a coating layer 26 , it is possible to reduce the occurrence of scale. At this time, the coating layer 26 is formed by thermal spray coating any one of diamond, metal, and ceramic.

4 is a cross-sectional view showing a state in which another embodiment of the reactor is applied to the present invention, and FIG. 5 is a plan cross-sectional view of FIG. 4, respectively.

As shown in FIGS. 4 and 5 , the reaction tank 2 forms the inlet 22 and the outlet 23 in a tangential shape deviating from the center of the reaction tank 2 , and a spiral protrusion 27 is formed on the inner surface of the reaction tank 2 . Thus, when the water to be treated introduced into the inlet 22 moves to the outlet 23 , it may be vortexed inside.

In the case of the reaction tank 2 provided in the present invention, a support ring 28 is provided outside the upper portion where the screw hole 21 is formed so that it can be easily fixed to other structures, and a ground terminal 29 is provided to provide a DC generator 4 ) and the (-) terminal that is electrically connected to it.

The electrode module 3 coupled to the reaction tank 2 forms a threaded part 32 on the surface of the stopper 31 coupled to the screw hole 21 of the reaction tank 2 , and the electrode rod 33 is located at the center of the stopper 21 . ) is composed of a combination of

6 is an enlarged cross-sectional view showing the configuration of the electrode module applied to the present invention, respectively.

The electrode 33 is covered with an insulating tube 34 toward the screw portion 32 of the stopper 31 coupled to the screw hole 21 of the reaction tank 2 so that there is no risk of electric leakage, and the side exposed to the water to be treated A ceramic tube or a glass tube 35 is covered on the outside of the electrode 33 of the to enable plasma reaction, and a ground terminal 36 is provided in the portion exposed to the upper side of the stopper 31 to provide a DC generator (4) It can be used as a (+) terminal that is electrically connected to

And a coating layer 37 coated with any one of diamond, metal, and ceramic by thermal spraying is formed on the surface of the ceramic tube or the glass tube 35 covered on the outside of the electrode rod 33 .

A DC generator 4 that provides power to the reactor 2 and the electrode module 3 is used to provide a high voltage of 5 to 15 kv.

When you want to use the plasma reactor 1 for water treatment of the present invention configured as described above, first open the valve 24 provided at the inlet 22 and outlet 23 installed in the semi-silver tank to move the water to be treated. As much as possible, a high voltage of 5 to 15 kv provided from the DC generator 4 may be provided to the semi-silver tank and the electrode module 3 .

As described above, when a high voltage is provided to the reactor 2 and the electrode module 3 , charging is performed in the water to be treated passing through the reactor 2 .

When charging is made in the water to be treated, some of the water molecules (H2O) in the water to be treated are electrolyzed into hydrogen (H) and oxygen (O), and the decomposed hydrogen and oxygen and oxygen in the air introduced into the water to be treated Ozone (O3) and radicals (OH) are generated as they combine with each other.

As described above, the radicals generated in the water to be treated are instantaneously generated and then separated again to be reduced to water molecules, and ozone is discharged to the outside through the outlet 23 along the treated water.

At this time, the organic matter and microorganisms present in the water to be treated exhibit the function of being decomposed or removed by ozone and radicals.

The above (OH) radical (Hydroxyl Radical) is a simple anion-based natural material generated in a plasma state by high and strong energy charged between the reaction tank 2 and the electrode module 3, and provides the strongest sterilizing power on earth. After reacting with organic matter and microorganisms, it is reduced to oxygen and water.

Therefore, when using the plasma generator for water treatment provided in the present invention, it is possible to treat water without chemicals, thereby reducing environmental pollution, and it is considered that contaminated water can be effectively treated due to strong sterilization, deodorization, and decomposition effects.

The plasma reactor 1 for water treatment provided in the present invention can cleanly wash contaminants including oil on the surface of the vehicle by the water to be treated when used for washing as well as for sewage treatment. effect can be expected.

In the detailed description of the present invention, although specific embodiments are described, various modifications are possible without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the described embodiments, and should be defined by the following claims as well as equivalents.

1: Plasma reactor for water treatment 2: Reaction tank
21: screw hole 22: inlet
23: outlet 24: valve
25: bubble generator 26, 37: coating layer
27: spiral protrusion 28: support ring
29: ground terminal 3: electrode module
31: stopper 32: screw part
33: electrode 34: insulating tube
35: ceramic tube or glass tube 36: ground terminal
4: DC generator

Claims (5)

a cylindrical reactor 2 having an inlet 22 at the lower side and an outlet 23 at the upper side so that the water to be treated can move;
a stopper (31) screwed to be watertight through the screw hole (21) opened at the upper portion of the reaction tank (2);
an electrode module 3 located in the center of the reactor 2 in a state coupled to the stopper 31;
characterized in that it comprises a direct current generator (4) electrically connected to supply power to the reactor (2) and the electrode module (3);
The electrode module (3) is coupled to the electrode rod (33) perpendicular to the stopper (31);
The electrode rod 33 is covered with an insulating tube 34 under the screw portion 32 on the side coupled to the screw hole 21, and a ceramic tube or glass tube under the insulation tube 34 exposed to the water to be treated. (35) is covered, characterized in that the plasma reaction can be made;
The inner surface of the reactor (2) and the surface of the ceramic tube or glass tube (35) covered on the electrode rod (33) is characterized in that a coating layer (26) (37) coated with any one of diamond, metal, and ceramic by thermal spraying is formed. Plasma reactor for water treatment.
delete delete The method of claim 1 ;
The inlet 22 and the outlet 23 are formed in a tangential shape deviating from the center of the reaction tank 2, and a spiral protrusion 27 is formed on the inner surface of the reaction tank 2 so that the water to be treated is moved in a vortex. Plasma reactor for water treatment.
The method of claim 1 ;
A plasma reactor for water treatment, characterized in that by further installing a bubble generator (25) to which oxygen is supplied to the inlet (22) side, oxygen can be additionally supplied to the water to be treated, which is supplied to the inlet (22).

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