KR100932377B1 - Method of water purification using high density underwater plasma torch - Google Patents

Abstract

PURPOSE: A method for water purification using a high density underwater plasma torch is provided to process various environmental pollutants by increasing diffusion effects of activated radicals and gas with contact oxidation reaction. CONSTITUTION: A method for water purification using a high density underwater plasma torch includes the following steps of: installing the high density underwater plasma torch(S1); adjusting a location and the distance of a conductive implantation electrode and a conductive opposite electrode of a mesh type(S2); maintaining and generating plasma stably in water(S3); generating streamer plasma of high density by injecting power after connecting the electrodes on a terminal of an electronic neon-transformer(S4); and purifying the contaminated water by increasing the contact time and contact surface area with a porous bubble device(S6).

Description

Method of water purification using high density underwater plasma torch}

The present invention relates to a water purification method using a high density underwater plasma torch.

In general, water treatment technology can be roughly divided into physical and chemical treatment, biological treatment, and multi-stage treatment. However, a lot of researches are currently being carried out to see a better water treatment effect beyond these technologies, and a lot of research is being conducted around a so-called advanced water treatment technology. In view of the above-described types of advanced water treatment technology, there are 1) an electrochemical method, 2) an electric and magnetic water treatment technology, 3) an ultraviolet water treatment technology, and 4) a plasma water treatment technology. It belongs to water treatment technology using plasma, and it is possible to treat harmful substances in water as well as harmful gases and odors in the atmosphere.

On the other hand, the conventional water treatment technology is agglomeration treatment, ozone oxidation treatment using ozone, activated carbon adsorption to adsorb soluble organic compounds and compounds, biological treatment by microorganisms, fenton oxidation process and the like are widely used. Among them, ozone is the most commonly used, and efforts are being made to apply ozone to environment improvement and disease prevention in workplaces such as industrial wastewater and landfill leachate. This is because ozone has a strong oxidizing power, which theoretically has the potential to completely decompose organic matter into CO ₂ and H ₂ O and produces no by-products, but gradually reveals the chemical properties and decomposition mechanism of ozone. It is known that the reaction between ozone and some organic matters is selective or the reaction rate is slow.

In order to overcome the shortcomings of the ozone treatment and the limitations of the conventional oxidation treatment process, an advanced oxidation treatment method which promotes the generation of OH radicals having much stronger oxidizing power in water than the general oxidizing agent to purify contaminated water The Advanced Oxidation Process (AOP) is considered to be very effective for water treatment.

The advanced oxidation process goes beyond the limitation of the conventional treatment method that directly decomposes organic substances from oxidant injected directly such as ozone, hydrogen peroxide, and ultraviolet light, and combines several unit processes. It is an advanced oxidation treatment that produces and expects water treatment effects. OH Radical is an intermediate produced during the decomposition of ozone, and has a higher redox potential difference (2.80 [V]) than ozone itself. It readily targets unsaturated hydrocarbons and aromatic compounds, and in the case of halogenated compounds, replaces halogen elements. It is also involved in decomposition via a pathway. After all, the ultimate goal of AOP is to maximize the concentration of these OH Radicals.

In addition, the types of AOP that can be applied to water treatment in a complex process include O ₃ / highpH, O ₃ / H ₂ O ₂ (Peroxone), O ₃ / UV, H ₂ O ₂ / UV, and the like. Underwater high voltage plasma discharge is being actively researched.

In addition, among the advanced water treatment technologies, water treatment technology using plasma is mainly used for removing harmful gases in the air environment field in the past as a low temperature plasma process, but unlike the conventional water treatment technology, it does not require chemical input, and the treatment process is simple, and the second pollution Recently, a new concept of water treatment technology has emerged as an advantage that does not occur, and discharges forming low temperature plasma include pulse streamer discharge, silent discharge, partial discharge, creepage discharge and corona discharge. Electric discharges for water pollutant treatment have been actively conducted in the United States, Japan, the Netherlands, the Czech Republic, Russia and Canada since the late 1980s. The generation of high voltage pulse discharges in water or on the surface initiates a variety of physical and chemical processes, producing UV, shock waves, and chemically active species such as H, O, OH, and H ₂ O ₂ . In the gas discharge, it is known that when oxygen is present in the background gas, high concentrations of ozone and active radicals are generated and easily dissolved in water to participate in the process of removing pollutants.

In particular, when air is used as the inlet gas of the plasma generator, the main reaction equation expected in the plasma generator is as follows, and radicals such as O ₃ , O, OH, H, N, and HO ₂ are generated, and these unstable products are secondary. By reacting with pollutants or oxygen to form peroxide or a new type of radical, a chain oxidative decomposition reaction proceeds. This oxidation reaction is a hardly decomposable substance, harmful gases and odors in the atmosphere, and color and waste water sterilization treatment. It can be widely applied to water purification.

N ₂ + e → N + N + e Equation 1

N₂ + e → N₂ ^- Equation 2

O ₂ + e → 2O + e Equation 3

O₂ + e → O₂ ^- Equation 4

H ₂ O + e → H + OH + e Equation 5

O + e → O ^- equation 6

O ₂ + H → HO ₂ Formula 7

H ₂ O + O → 2OH Equation 8

O + O₂ → O₃ Equation 9

N ₂ + O ₂ → N ₂ + ₂ O Equation 10

At present, too much plasma discharge technique for water treatment has been studied, and it has been proved by many academic experiments that it is very effective when plasma is introduced into water.

However, to date, almost all technologies are very difficult to generate plasma due to the conductivity of water when plasma is generated in water, and short-circuit prevention technology must be applied. Electrodes on the surface of the surface for water surface discharge or electrodes coated with a coating film.

These devices are difficult to install due to their large size and heavy weight, and have disadvantages due to high power consumption, high price, and difficulty in operation and maintenance.

In addition, recently, techniques for generating discharge in water using various dielectrics have been studied, but problems such as short circuit or sudden decrease in discharge efficiency due to failure to maintain stable discharge in water are still occurring.

Therefore, the present invention has been made to solve the above problems, an object of the present invention, by directly injecting a plasma reactor in water to prevent deterioration and to form a strong electric field to transfer the plasma energy of the micron size bubble generator By increasing the contact time and surface area with water to increase the diffusion effect of activated radicals and gases in the high-density plasma region and the catalytic oxidation reaction, high-density underwater enables efficient treatment of various environmental pollutants such as industrial wastewater. Provided is a water purification method using a plasma torch.

According to a feature of the present invention for achieving the above object,

In the water purification method using a high density underwater plasma torch to put the plasma reactor in water to prevent the deterioration of the reactor, and to form a strong electric field in the water surface and water to effectively transmit the plasma energy,

The method is a transparent quartz tube 110 having a length longer than the diameter of the specification of the inner diameter is 1.5 ~ 10mm, the outer diameter is 3 ~ 16mm and the thickness is 0.7 ~ 3mm, and inserted into the transparent quartz tube 110 of the quartz tube The conductive discharge electrode 120 having a diameter capable of securing an inner diameter and a discharge gap and the outer surface of the transparent quartz tube 110 are brought into contact with each other to concentrate the maximum dislocation hardness at the conductive discharge electrode 120 so as to concentrate the high density plasma. A mesh-type conductive counter electrode 130 forming an area and a top surface of the transparent quartz tube 110 are assembled to fix the conductive discharge electrode 120 to a central axis inside the transparent quartz tube 110 to maintain the gap distance. A first step of building an underwater plasma reactor having an electrode tip 141, a radial torch head 140 having a gas inlet 142 and a high voltage line inlet 143;

A second step of increasing the fluidity of the plasma to be used by controlling the position and distance of the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 inserted into the transparent quartz tube 110;

A third step of stably generating and maintaining plasma in water by blocking a path to water with air or gas pressure injected through the regulator 200 connected to the gas inlet 142;

The conductive discharge electrode 120 and the mesh type conductive counter electrode 130 are connected to the terminals of the commercial electronic neon transformer 300 to supply power of 9 [kV] to 15 [kV] and 22.5 [kHz] to 23 [kHz]. Applying a fourth step to generate a high density streamer plasma;

A fifth step of immediately injecting the air or gas injected in the third step into the water when activated in the primary plasma region a and the high density plasma region b;

In addition, at the lower end of the transparent quartz tube 110, a dense porous bubble device generating micron-sized bubbles in order to increase the diffusion effect and the catalytic oxidation reaction of the activated radicals and gases emitted through the high density plasma region (b) ( It provides a water purification method using a high-density underwater plasma torch, characterized in that it comprises a sixth step of purifying the contaminated water quality by increasing the contact time and the contact surface area with water through 400).

Preferably, the first plasma region (a) and the high density plasma region (b) of the fifth step, the water itself serves as a single conductive electrode, the outside of the conductive discharge electrode 120 and the transparent quartz tube 110 The primary plasma region (a) of a certain length is activated in the vicinity of the water, and at the same time, the fifth plasma is formed such that the high density plasma region (b) is formed around the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 below. Characterized in that it further comprises a step.

According to the present invention, the following effects are obtained.

According to the present invention, a plasma reactor having a simple structure is introduced into water to form a strong electric field, and the high density plasma energy delivered by the micron-sized bubble generator is used to diffuse and contact the activated radicals and gases in the plasma region. By increasing the response,

(1) Low-cost installation cost, easy maintenance, plasma generation in the water, and by keeping the stable plasma by blocking the converter with water, it is possible to continuously generate and secure a high concentration of ozone and a large amount of active radicals, so that water treatment The effect can be enhanced.

(2) By directly irradiating plasma energy into the water, it is possible to combine the effects of friction and electric field with the waste water, and the underwater discharge effect such as ultraviolet rays and shock waves, so that the efficiency of removing pollutants can be raised to the limit. Can be.

(3) High concentrations of ozone and active radicals are produced and injected directly into the water to be treated as micron-sized microbubbles through a dense porous bubble device, and the surface area and contact time are increased to increase the contact area and contact oxidation. Since it rises sharply, the utilization efficiency of treatment efficiency, treatment capacity, radicals, etc. is very high.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components, even if displayed on different drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a plan view schematically showing a high density underwater plasma torch generator according to a preferred embodiment of the present invention, Figure 2 is a three-dimensional view of a high density underwater plasma torch generator according to a preferred embodiment of the present invention 3 is a three-dimensional view showing the torch head of the high density underwater plasma torch generator according to a preferred embodiment of the present invention, Figure 4 is a schematic diagram of a regulator and a commercial electronic neon transformer of the high density underwater plasma torch generator according to a preferred embodiment of the present invention. 5 is a flowchart illustrating a water purification method using a high density underwater plasma torch according to a preferred embodiment of the present invention.

The key technical configuration of the water purification method using the high density underwater plasma torch according to the preferred embodiment of the present invention is a water plasma reactor (torch) 100 having a simple structure and a regulator for injecting and regulating air or gas ( 200, a high-voltage, low-power, low-cost, commercial electronic neon transformer 300 for generating plasma, and a dense porous bubble device 400 for promoting an oxidation reaction.

2 to 4, the technical configuration of the water purification method using a high density underwater plasma torch in accordance with a preferred embodiment of the present invention will be described in detail.

First, referring to FIGS. 1 and 2, the underwater plasma reactor 100 is a reactor means for generating plasma in water, and the torch is a transparent quartz tube having a length longer than a certain diameter. 110, a conductive discharge electrode 120 having a diameter inserted into the transparent quartz tube 110 to secure an inner diameter and a discharge gap of the quartz tube, and an outer surface of the transparent quartz tube 110. A pair of electrodes formed as a mesh-type conductive counter electrode 130 contacting to and concentrating the maximum potential hardness of the conductive discharge electrode 120 to form a high density plasma region, and assembled to an upper end of the transparent quartz tube 110. A radial torch head having an electrode tip 141 and an air or gas inlet 142 and a high-voltage cable inlet 143 for fixing the conductive discharge electrode 120 to an internal central axis of the transparent quartz tube 110 to maintain a gap distance. 140.

The transparent quartz tube 110 is used for satisfying the required mechanical strength and emitting ultraviolet rays generated in the insulation and the primary plasma region (a) and the high density plasma region (b), and replaces all the tubes made of the insulating material. Can be used. Of course, the use of quartz tube is more suitable for UV emission, and the inner diameter is 1.5 ~ 10 [mm] inside and outside (preferably 6mm), the outside diameter is 3 ~ 16 [mm] inside and around (preferably 8mm) and the thickness is 0.7 ~ 3 [mm] inside and outside (preferably 2mm) was used, the length can be adjusted according to the environment, there is no limit of length and of course there is no particular limit of size. Therefore, it can be used even when the quartz tube is smaller or larger.

In addition, the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 may be used as long as it is a conductive material, the mesh type conductive counter electrode 130 is made of a corrosion-resistant metal mesh material, discharge efficiency In order to increase the length, the length of 10 [cm] ~ 15 [cm] (preferably 10 [cm]) is most suitable.

Here, the voltage applied to the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 may be used as long as it is a power source capable of generating a breakdown voltage starting from approximately 7 [kV], and commercially available as well as a high frequency power source. It can be applied freely within the scope of the power source. In addition, the 7 [kV] may adjust the size of the device to enable operation even below. This allows for custom fabrication to match the power capacity and requirements.

In addition, in order to prevent electric field concentration at the tip end of the conductive discharge electrode 120 and generate stable and high-density plasma, the height of the mesh type conductive counter electrode 130 is increased at the tip end of the conductive discharge electrode 120. It is preferable to locate at the top of 3-5 mm.

In addition, the diameter of the conductive discharge electrode 120 should be smaller than the inner diameter of the transparent quartz tube 110, but the relationship between the radius r of the conductive discharge electrode 120 and the radius R of the inner diameter of the transparent quartz tube R / r ≒ 3 or more. This is because the electric field strength of the inner electrode surface changes according to the inner radius of the outer electrode and the size of the radius of the inner electrode, and is intended to stably generate streamer discharge via the corona.

In addition, the radial torch head 140 is located on top of the transparent quartz tube 110, and should be used as an insulating material capable of cushioning to prevent breakage of the transparent quartz tube. In addition, the electrode tip 141 and the regulator for fixing the conductive discharge electrode 120 to the inner central axis of the transparent quartz tube 110 to adjust the insertion length to form an even discharge region in the reactor ( Applying power to the gas inlet 142 for injecting gas or air into the space between the conductive discharge electrode 120 and the inner diameter of the transparent quartz tube 110 through the 200 and the mesh type conductive counter electrode 130 in water It consists of a high-voltage cable inlet 143 for. The distance between the conductive wire discharge electrode 120 and the high voltage cable inlet 143 is a distance of at least 20 [mm] to prevent loss of output voltage, short circuit and corona loss.

On the other hand, a useful feature of the present invention, first the insertion length of the conductive discharge electrode 120 in the transparent quartz tube 110 and the position and distance of the mesh type conductive counter electrode 130 can be adjusted to the density of the plasma or the plasma It is possible to vary the generation type, intensity and generation area of the. That is, according to the position and range of the high density plasma region b, the primary plasma active region a can be located at the top or bottom, or above and below the high density plasma region b. Therefore, there is no restriction in the plasma generation region other than the high density plasma region (b), and since the discharge property can be applied according to the use environment or situation, the fluidity in use is large. In particular, in the present invention, the primary plasma active region (a) is proposed by allowing the gas or air flowing into the transparent quartz tube 110 to be primarily activated and injected into the water through the high density plasma region (b). To efficiently generate large amounts of active species and radicals.

Next, when the high-density underwater plasma torch of the present invention is applied to water treatment, a high density porous bubble device 400 may be installed at the lower end of the transparent quartz tube 110 to rapidly increase the water purification effect. The high-density porous bubble device 400 generates bubbles of a micron size, so long as it can widen the contact surface area with water can be used in the existing products or manufactured, the gas of the present invention can be used The type also has no special limitation, so it can be used appropriately according to the environment, and thus there is an advantage that various changes can be made depending on the use situation.

Next, the main active mechanism of the plasma in the present invention, the mesh-like conductivity is provided on the conductive discharge electrode 120 and the outer surface of the transparent quartz tube 110 inside the transparent quartz tube 110 is in direct contact with water The transparent quartz tube 110 exists between the counter electrode 130 and is inserted into the transparent quartz tube 110, that is, the inner diameter of the transparent quartz tube 110 and the transparent quartz tube 110. Injecting gas or air into the space formed between the outer diameter of the conductive discharge electrode 120 located in the center of the inner diameter by using the regulator 200 to the inside of the transparent quartz tube 110 and the conductive at their pressure By forming a space between the lower end of the discharge electrode 120 and the water to block the converter, it prevents the short circuit between the conductive discharge electrode 120 and the water and at the same time plasma in the space To generate.

In this case, plasma of two regions is generated in the transparent quartz tube 110.

First, the primary plasma active region a is a discharge region of a predetermined length on the upper surface of the mesh type conductive counter electrode 130 provided on the outer surface of the transparent quartz tube 110. Since the mesh type conductive counter electrode 130 is in direct contact with water, since water itself serves as a conductive electrode, charging occurs, thereby forming a glow or a streamer, which is one of discharges in the group. This serves to primarily activate the gas or air injected into the space between the transparent quartz tube 110 and the conductive discharge electrode 120.

Next, the high density plasma region b is a discharge region generated by the mesh type conductive counter electrode 130 provided on the outer surface of the transparent quartz tube 110. The dielectric tube (transparent quartz tube 110) is sandwiched between the conductive discharge electrode 120 and the number [mm], and the concentration coefficient of the maximum dislocation hardness is increased. Streamer plasma is generated.

Referring to FIG. 3, the regulator 200 is a means for injecting or regulating air or gas, and the gas is supplied into the space between the transparent quartz tube 110 and the conductive discharge electrode 120 of the underwater plasma reactor 100. Inflate by adjusting air.

In addition, referring to FIG. 3, the commercial electronic neon transformer 300 is a high voltage applying means for generating a plasma, and is 9 [kV] to 15 to the conductive discharge electrode 120 and the mesh type conductive counter electrode 130. Apply the power of [kV], 22.5 [kHz] ~ 23 [kHz].

Hereinafter, the action for stably generating the high density plasma of the present invention in water will be described in more detail.

The power supply used in the present invention is a commercial electronic neon transformer, a high voltage pulsed AC power supply having a high frequency of 22.5 [kHz] to 23 [kHz]. When power is applied between the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 with the dielectric tube (transparent quartz tube 110) applied, the capacitance of air and the dielectric tube (transparent quartz tube 110) is increased. Due to the charging current, leakage current due to insulation resistance, and current for supplying the dielectric loss, the important thing in this case is the dipole conduction current caused by the phenomenon that the dipole molecules try to turn in the direction of the electric field. This current does not flow with respect to the DC voltage when the dipole molecules are turned in the direction of the electric field, but when the power supply used in the present invention is applied, the dipole molecules correspond to the power source frequency by switching the polarity of the alternating field. It is turned in that direction and a current flows in the dielectric, and since the dipole molecules vibrate, friction and electric field effects with adjacent water molecules occur. When the height of the mesh type conductive counter electrode 130 is present at the bottom of the tip of the conductive discharge electrode 120, an electric field is concentrated on the mesh type conductive counter electrode 130 at the tip of the tip of the conductive discharge electrode 120. When the arc discharge occurs, or the non-discharge area is increased, the efficiency is reduced, and when exposed to the water or water particles and the liquid introduced into the transparent quartz tube 110, the liquid surface vibrates, a portion rises or recesses occur, thereby destroying the insulation. Easy to be Therefore, by placing the height of the mesh type conductive counter electrode 130 at the top of 3 [mm] to 5 [mm] at the tip end of the conductive discharge electrode 120, the electric field concentration coefficient is alleviated to maintain a stable discharge area. do.

Accordingly, a conductive phenomenon occurs between the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 in contact with the surface of the dielectric tube (transparent quartz tube 110), thereby generating a high density plasma and forming a strong electric field in water. In this way, plasma energy can be injected into the water efficiently.

In addition, the conventional technique of generating plasma in water is a very inefficient treatment method because a short circuit occurs due to conductive water when the electrode is submerged in water or a discharge space is limited in the case of water surface discharge. Insulation breakage occurs due to inconsistent length, so use a very expensive pulse power supply or dielectric coated electrode. Due to the expensive equipment and difficulty of operation and installation, it is not generalized, whereas in the present invention, the conductive discharge electrode 120 and the electric path between the water are blocked to stably generate a high density plasma, and are generated by streamer discharge. Since only the amount of charged charge transfers plasma energy to the water, a short circuit does not occur, and only the amount of charge generated in the streamer discharge saturates the current, thereby generating a stable plasma that does not exceed the capacity of the power supply. This allows continuous plasma energy transfer.

On the other hand, the pressure of the air or gas and the magnitude of the voltage is a very important factor because it greatly affects the intensity of the plasma. In other words, based on Passen's law and towngent theory, the number of collisions and the pressure of the particles and the distance between the electrodes (the conductive discharge electrode 120 and the mesh type conductive counter electrode 130) must be very important factors for plasma generation. The distance between the electrodes (the conductive discharge electrode 120 and the mesh type conductive counter electrode 130) is simply adjusted and the distance between the electrodes (the conductive discharge electrode 120 and the mesh type conductive counter electrode 130) is adjusted according to the need. It is a matter of course that the plasma intensity can be adjusted by adjusting appropriately. In addition, since plasma is strictly natural energy, it is difficult to assume that it is an engineering because it is not linear as in power engineering or electromagnetics. Therefore, controlling the intensity of the plasma by adjusting the voltage and the strength of air and gas pressure can be very flexible, so that the user must adjust the strength of the voltage and gas pressure appropriately to obtain the appropriate intensity of the plasma.

In the first plasma region (a), the present invention generates a mixture of H ⁺ , O ₃ , radicals, and ions as a region for primarily contacting and activating air or gas, and these by-products pass through a high density plasma region (b). And more activated and immediately injected into the water to generate a large amount of active species such as high concentrations of OH, H ⁺ , H ₂ O ₂ , bagged electrons and various radicals, and the transparent quartz tube 110 and the mesh type conductive counter electrode 130 Ultraviolet rays and plasma energy radiated between the can be directly irradiated to the treatment object.

Referring back to FIG. 1, the dense porous bubble device 400 is a means for promoting an oxidation reaction, and is connected to the lower end of the transparent quartz tube 110 and increases the contact time with water and the contact surface area to increase the contact oxidation reaction. Generate micron-sized bubbles to increase That is, bubbles containing a large amount of highly active radicals emitted through the high-density plasma region (b) do not aggregate and are finely divided to drift and diffuse in the water.

Therefore, the contact time with water and the surface area is increased, so that the dissolution rate and the catalytic oxidation of high concentration active species can be greatly increased, so the treatment time is very fast and excellent effect in the treatment of environmental pollutants.

Referring to FIG. 4, a water purification method using a high density underwater plasma torch according to a preferred embodiment of the present invention will be described with reference to a flowchart.

The water purification method of the present invention is directed to the above-described preferred embodiment of the present invention, in which the plasma reactor is directly introduced into water to prevent deterioration of the reactor, and a strong electric field is formed on the water surface and in water to effectively transfer plasma energy. S1 step of building the underwater plasma reactor 100 included in the high density underwater plasma torch generator according to the.

In addition, S2 step of increasing the fluidity of the plasma to be used by adjusting the position and distance of the conductive discharge electrode 120 and the mesh-type conductive counter electrode 130 inserted into the transparent quartz tube 110.

In addition, the step S3 of generating and maintaining a plasma in the water stably by blocking the converter to the water by the air or gas pressure injected through the regulator 200 connected to the gas inlet 142.

In addition, the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 are connected to the terminals of the commercial electronic neon transformer 300, so that 9 [kV]-15 [kV], 22.5 [kHz]-23 [kHz] S4 step of applying a power source to generate a high density streamer plasma.

In addition, when the air or gas injected in the third step is activated in the plasma region (a), (b) comprises a step of injecting into the water immediately.

In addition, the plasma regions (a) and (b) of the fifth step may have a predetermined length around water outside the conductive discharge electrode 120 and the transparent quartz tube 110, by which water itself serves as a conductive electrode. The primary plasma region a may be activated, and at the same time, a step S5-1 may be formed in which the high density plasma region b is formed around the conductive discharge electrode 120 and the mesh type conductive counter electrode 130.

In addition, at the lower end of the transparent quartz tube 110, a dense porous bubble device generating micron-sized bubbles in order to increase the diffusion effect and the catalytic oxidation reaction of the activated radicals and gases emitted through the high density plasma region (b) ( S6 step to purify the contaminated water quality by increasing the contact time and the contact surface area with water through 400).

As described above, the water purification method using the high density underwater plasma torch according to the preferred embodiment of the present invention includes an underwater plasma reactor 100 having a simple structure, a regulator 200 for injecting and regulating air or gas, and a high voltage and low power low cost. By constructing a commercial electronic neon transformer 300 for plasma generation and a compact porous bubble device 400 for promoting an oxidation reaction, the cost of power is minimized, and an underwater plasma reactor having a simple structure can be operated and installed. It is easy to repair and repair in case of trouble. In addition, by generating the plasma by directly contacting the underwater plasma reactor with water, it is possible to prevent the deterioration of the reactor and to form a strong electric field in the water surface and the water to efficiently transmit plasma energy. In addition, by installing the dense porous bubble device 400 at the lower end of the transparent quartz tube 110, the activated radicals and gases that have passed through the high-density plasma region (b) of the reactor by increasing the contact time and the contact surface area with water. It is possible to significantly increase the diffusion effect and the catalytic oxidation reaction.

Therefore, the present invention is a water quality that can effectively treat environmental pollutants in a variety of fields, such as difficult to decompose and livestock wastewater, industrial wastewater treatment, removal of harmful gases and odors in the air, sterilization and color, turbidity removal of wastewater It will provide a way to boot.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1 is a plan view schematically showing a high density underwater plasma torch generator according to a preferred embodiment of the present invention]

Figure 2 is a three-dimensional view of the high density underwater plasma torch generating apparatus according to a preferred embodiment of the present invention of FIG.

Figure 3 is a three-dimensional view showing the torch head of the high density underwater plasma torch generating apparatus according to a preferred embodiment of the present invention

Figure 4 is a plan view schematically showing a regulator and a commercial electronic neon transformer of the high density underwater plasma torch generator according to a preferred embodiment of the present invention

5 is a flowchart illustrating a water purification method using a high density underwater plasma torch according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

a: primary plasma region b: high density plasma region

100: underwater plasma reactor 110: transparent quartz tube

120: conductive discharge electrode 130: mesh type conductive counter electrode

140: radial torch head 141: electrode tip

142: gas inlet 143: power cable inlet

200: regulator 300: commercial electronic neon transformer

400: high density porous bubble device

Claims (2)

In the water purification method using a high density underwater plasma torch to put the plasma reactor in water to prevent the deterioration of the reactor, and to form a strong electric field in the water surface and water to effectively transmit the plasma energy, The method is a transparent quartz tube 110 having a length longer than the diameter of the specification of the inner diameter is 1.5 ~ 10mm, the outer diameter is 3 ~ 16mm and the thickness is 0.7 ~ 3mm, and inserted into the transparent quartz tube 110 of the quartz tube The conductive discharge electrode 120 having a diameter capable of securing an inner diameter and a discharge gap and the outer surface of the transparent quartz tube 110 are brought into contact with each other to concentrate the maximum dislocation hardness at the conductive discharge electrode 120 so as to concentrate the high density plasma. A mesh-type conductive counter electrode 130 forming an area and a top surface of the transparent quartz tube 110 are assembled to fix the conductive discharge electrode 120 to a central axis inside the transparent quartz tube 110 to maintain the gap distance. A first step of building an underwater plasma reactor having an electrode tip 141, a radial torch head 140 having a gas inlet 142 and a high voltage line inlet 143; A second step of increasing the fluidity of the plasma to be used by controlling the position and distance of the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 inserted into the transparent quartz tube 110; A third step of stably generating and maintaining plasma in water by blocking a path to water with air or gas pressure injected through the regulator 200 connected to the gas inlet 142; The conductive discharge electrode 120 and the mesh type conductive counter electrode 130 are connected to the terminals of the commercial electronic neon transformer 300 to supply power of 9 [kV] to 15 [kV] and 22.5 [kHz] to 23 [kHz]. Applying a fourth step to generate a high density streamer plasma; A fifth step of immediately injecting the air or gas injected in the third step into the water when activated in the primary plasma region a and the high density plasma region b; In addition, at the lower end of the transparent quartz tube 110, a dense porous bubble device generating micron-sized bubbles in order to increase the diffusion effect and the catalytic oxidation reaction of the activated radicals and gases emitted through the high density plasma region (b) ( And a sixth step of purifying the contaminated water by increasing the contact time with the water and the contact surface area through the water 400). The method of claim 1, wherein the primary plasma region (a) and the high-density plasma region (b) of the fifth step, the water itself serves as one conductive electrode, the conductive discharge electrode 120 and the transparent quartz tube 110 The first plasma region (a) of a certain length is activated around the external water, and at the same time, the high density plasma region (b) is activated around the conductive discharge electrode 120 and the mesh type conductive counter electrode 130 below. Water purification method using high density underwater plasma torch further comprising step 5-1

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