KR20130028184A - Plasma torch structure established in water - Google Patents

Abstract

PURPOSE: An underwater installation plasma torch structure is provided to diffuse radical and gas which are activated in a plasma area and to increase catalytic oxidation reaction, thereby easily removing an environment pollutant. CONSTITUTION: A conductive discharge electrode(20) is inserted into a transparent quartz pipe(10). The conductive discharge electrode has the transparent quartz pipe and a discharge electrode gap in a diameter direction. A conductive counter electrode(30) is separated from the outside of the transparent quartz pipe and is installed. The conductive counter electrode forms a high density plasma region. A torch cap(40) is assembled in an upper part of the transparent quartz pipe. The torch cap forms an electrode tip hold, a gas inlet, and a counter electrode inlet.

Description

Plasma torch structure established in water

The present invention relates to an underwater plasma torch structure, and more particularly, to a plasma torch which can be installed in water to generate plasma by high voltage to purify water.

Patent No. 10-0932377 (December 16, 2009) discloses a water treatment technology using plasma as a background art of the invention. Generally, water treatment technology is largely physical and chemical. Treatment, biological treatment, and multistage treatment can be roughly classified. 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 environmental improvement and disease prevention in workplaces such as industrial wastewater and landfill leachate. This is because ozone has 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. However, the chemical characteristics and decomposition mechanism of ozone are gradually revealed. 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 more powerful 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.

     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, ultraviolet ray, etc., and combines several unit processes to combine artificially oxidizing OH radicals in water. 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 may also be involved in degradation via pathways. 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 studied.

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. 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 discharge research for water pollutant treatment has 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 water surface initiates a variety of physical and chemical processes that produce UV, shock waves, and chemically active species such as H, O, OH, and H ₂ O ₂ , which occur close to the water surface. 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. Such oxidation reactions are difficult to decompose materials, harmful gases and odors in the air, sterilization of color and wastewater, etc. It can be widely applied to water purification.

N ₂ + e N + N + e Equation 1

N ₂ + e N ₂ ^- Equation 2

O ₂ + e ₂ O + e Equation 3

O ₂ + e O ₂ ^- Formula 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 ₂ OH Formula 8

O + O ₂ O ₂ Expression 9

N ₂ + O ₂ N ₂ + 2O Equation 10

     At present, the plasma discharge technique for water treatment has been studied so much, and it is already proved by many academic experiments that it is very good effect when the plasma is added to the water has been recognized.

     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.

     Accordingly, Patent Publication No. 10-0932377 relates to a water purification method using a high density underwater plasma torch as a solution thereof. As described in the Abstract, a plasma reactor is introduced into water to prevent deterioration of the reactor. In the water purification method using a high density underwater plasma torch to effectively transmit plasma energy by forming a strong electric field in the water surface and water, the method has an inner diameter of 1.0 ~ 20mm, an outer diameter of 5 ~ 20mm and a thickness of 0.5 ~ 5mm A transparent quartz tube 110 having a length longer than the diameter of phosphorus standard, and a conductive discharge electrode 120 having a diameter which is inserted into the transparent quartz tube 110 to secure an inner diameter and a discharge gap of the quartz tube. ) And the outer surface of the transparent quartz tube 110 to concentrate the maximum potential hardness of the conductive discharge electrode 120, Mesh-shaped conductive counter electrode 130 to form a, and is assembled on the top of the transparent quartz tube 110, the electrode for fixing the conductive discharge electrode 120 to the central axis inside the transparent quartz tube 110 to maintain the gap distance A first step of constructing an underwater plasma reactor having a 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 7 [kV] to 15 [kV] and 21.0 [kHz] to 23 [kHz]. Applying a fourth step to generate a high density streamer plasma; And a fifth step of immediately injecting water into the water when the air or gas injected in the third step is activated in the high density plasma region, and at the lower end of the transparent quartz tube 110, The sixth step of purifying the contaminated water quality by increasing the contact time and surface area with water through the microporous bubble device 400 generating micron-sized bubbles in order to increase the diffusion effect and the catalytic oxidation reaction of radicals and gases Provided is a water purification method using a high density underwater plasma torch, including.

     However, the prior art as described above also has a disadvantage in that the radicals and gases activated in the plasma region do not have good diffusion and the catalytic oxidation reaction does not increase as desired, so that it is difficult to remove environmental pollutants easily and reliably. there was.

Therefore, the present invention is invented to solve the above problems, by installing a plasma torch in the water to form a strong electric field to generate a plasma, by generating bubbles in the water with air stone, activated radicals and gases in the plasma region, etc. This diffusion is good and the catalytic oxidation reaction is increased to provide an underwater plasma torch structure that can easily and reliably remove environmental pollutants.

The present invention relates to the structure of a plasma torch installed underwater, the plasma torch installed in water, the plasma torch is inserted into the transparent quartz tube, the transparent quartz tube 10, the transparent quartz tube and the discharge electrode in the radial direction A conductive discharge electrode 20 having a gap, a conductive counter electrode 30 spaced apart from the transparent quartz tube 10, and concentrating the maximum potential hardness in the conductive discharge electrode 20 to form a high density plasma region; An electrode tip hole 41, a gas inlet 42, and a conductive counter electrode 30 are assembled to an upper end of the transparent quartz tube 10 and fix the conductive discharge electrode 20 to the inside of the transparent quartz tube 10. It characterized in that it comprises a torch cap 40 is formed the opposing electrode inlet 43 is introduced.

The present invention forms a strong electric field by installing a plasma torch in the water to generate a plasma, and by generating air bubbles in the air stone, the radicals and gases activated in the plasma region is good diffusion and the catalytic oxidation reaction is increased In addition, there is a remarkable effect that can easily and reliably remove environmental pollutants.

1 is a plasma torch photo of the present invention underwater installation
2 is a whole photograph plasma torch cap installed in the present invention
Figure 3 is a photograph of the present invention underwater installation plasma torch cap
Figure 4 is a cross-sectional view of a conventional underwater installation plasma torch
5 is a view of a conventional underwater installation plasma torch device

The present invention relates to a structure of a plasma torch installed underwater, in the plasma torch installed in the water, the plasma torch is inserted into the transparent quartz tube, the transparent quartz tube 10, the transparent quartz tube and the discharge electrode in the radial direction A conductive discharge electrode 20 having a gap, a conductive counter electrode 30 spaced apart from the transparent quartz tube 10, and concentrating the maximum potential hardness in the conductive discharge electrode 20 to form a high density plasma region; An electrode tip hole 41, a gas inlet 42, and a conductive counter electrode 30 are assembled to an upper end of the transparent quartz tube 10 and fix the conductive discharge electrode 20 to the inside of the transparent quartz tube 10. It characterized in that it comprises a torch cap 40 is formed the opposing electrode inlet 43 is introduced.

     In addition, the torch cap 40 has an electrode tip hole 41, a gas inlet 42, and an opposite electrode inlet 43, and the gas inlet 42 has a horizontal hole formed in the side of the torch cap. Characterized in that it consists of a vertical hole communicated to the lower torch cap.

     In addition, the conductive counter electrode 30 has a linear shape and is installed in parallel with the transparent quartz tube 10 in which the conductive discharge electrode 20 is inserted, to form a plasma region.

     In addition, the lower end of the transparent quartz tube 10 is characterized in that the air stone 50 for generating air is coupled.

     In addition, a transparent acrylic tube is used instead of the transparent quartz tube.

The present invention will be described in detail with reference to the accompanying drawings. 1 is a photograph of the present invention underwater installation plasma torch, Figure 2 is a present invention underwater installation plasma torch cap photo, Figure 3 is the present invention underwater installation plasma torch cap photo, Figure 4 is a conventional underwater installation plasma torch cross-sectional view, 5 is a drawing of a conventional underwater installation plasma torch device.

     The present invention is a plasma torch installed in the water, the plasma torch is a transparent quartz tube is installed therein, the conductive discharge electrode 20 is inserted into the transparent quartz tube 10, the conductive discharge electrode 20 The silver diameter is made smaller than the transparent quartz tube to have a discharge electrode gap.

     The conductive counter electrode 30, which forms a high density plasma region by concentrating the maximum potential hardness of the conductive discharge electrode 20, is spaced apart from the transparent quartz tube 10.

     In addition, a torch cap 40 is installed at an upper end of the transparent quartz tube 10, and an electrode tip hole 41 for fixing the conductive discharge electrode 20 to the inside of the transparent quartz tube 10 is provided in the torch cap, and a gas is provided. An injection hole 42 and a counter electrode inlet 43 through which the conductive counter electrode 30 is introduced are formed.

     In particular, the gas inlet 42 is composed of a vertical hole communicated to the lower side of the torch cap after the horizontal hole is drilled to the side of the torch cap. In the torch cap, three screw assembly holes penetrating the upper and lower surfaces are radially drilled.

     In addition, the conductive counter electrode 30 has a linear shape and is disposed in parallel to the transparent quartz tube 10 in which the conductive discharge electrode 20 is inserted, thereby forming a plasma region.

     And the lower end of the transparent quartz tube 10 is coupled to the air stone 50 for generating air.

     In addition, the core technical configuration of the water purification method using the high density underwater plasma torch of the present invention is a water plasma reactor (torch) of a simple structure, a regulator for injecting and regulating air or gas, and a high voltage, low power and low cost plasma It consists of a commercial electronic neon transformer for generation and a dense porous bubble device to promote the oxidation reaction.

     The underwater plasma reactor is a reactor means for generating a plasma in water, the torch is a transparent quartz tube 10 having a length longer than a diameter of a predetermined standard, and the quartz tube is inserted into the transparent quartz tube 10 A conductive discharge electrode 20 having a diameter capable of securing an inner diameter and a discharge gap of the conductive discharge electrode 20, and the outer surface of the transparent quartz tube 10 in contact with the outer surface of the conductive discharge electrode 20 to concentrate the maximum potential hardness at the conductive discharge electrode 20 A pair of electrodes serving as a conductive counter electrode 30 forming a plasma region, and assembled on top of the transparent quartz tube 10 to fix the conductive discharge electrode 20 to an internal central axis of the transparent quartz tube to reduce the gap distance. And a radial torch head having an electrode tip for holding and an air or gas inlet and a high voltage line inlet.

     The transparent quartz tube 10 is used for satisfying the required mechanical strength and emitting ultraviolet rays generated from insulation, and all the tubular bodies made of an insulating material can be used in place of the transparent quartz tube. In particular, acrylic tubes can be used. Of course, the use of quartz tube is more suitable for ultraviolet emission, and the inner diameter is around 1.0 ~ 20 [mm] (preferably 6mm), the outside diameter is about 5 ~ 20 [mm] (preferably 8mm) and the thickness is 0.5 ~ 5 [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 limitation of size.

     Therefore, it can be used even when the quartz tube is smaller or larger.

     In addition, the conductive discharge electrode 20 and the conductive counter electrode 30 can be used as long as the conductive material, the conductive counter electrode 30 is made of a corrosion-resistant metal material, 10 [cm] to increase the discharge efficiency A length of about 25 [cm] (preferably 15 [cm]) is most suitable.

     Here, the voltage applied to the conductive discharge electrode 20 and the conductive counter electrode 30 may be used as long as it is a power source capable of generating a higher withstand voltage starting from about 7 [kV]. It can be applied freely within its scope. 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 20 and generate stable and high-density plasma, the height of the conductive counter electrode 30 is set to 2 to the tip end of the conductive discharge electrode 20. It is preferable to locate at the top of 7 [mm].

     In addition, the diameter of the conductive discharge electrode 20 should be smaller than the inner diameter of the transparent quartz tube 10, but the relationship between the radius r of the conductive discharge electrode 20 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 40 is located on the top of the transparent quartz tube 10, and should be used as an insulating material capable of cushioning to prevent breakage of the transparent quartz tube. In addition, through the electrode tip 41 and the regulator for fixing the conductive discharge electrode 20 to the inner central axis of the transparent quartz tube 10 to adjust the insertion length to form an even discharge region in the reactor A gas inlet 42 for injecting gas or air into the space between the conductive discharge electrode 20 and the inner diameter of the transparent quartz tube 10, and a high voltage cable inlet for applying power to the conductive counter electrode 30 in water. have. The distance between the conductive wire discharge electrode 20 and the high voltage cable inlet port is at least 15 [mm] or more 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 20 in the transparent quartz tube 10 and the position and distance of the conductive counter electrode 30 can be adjusted to the density of the plasma or generation of plasma The generation area can be kept constant by making the type, intensity, and generation in a straight line. That is, there is no restriction in the plasma generation region because the high density plasma region is kept constant, and the discharge line is also applicable to the use environment or situation, so the fluidity in use is large.

     Next, when the high-density underwater plasma torch of the present invention is applied to water treatment, a high density porous bubble device may be installed at the lower end of the transparent quartz tube 10 to rapidly increase the water purification effect. The dense porous bubble device generates a micron-sized bubble, so long as it can increase the contact surface area with water, it can be used or manufactured in the existing products, and the type of gas that can be used in the present invention is also special. There is no limit

Since it can be used appropriately according to the environment, 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 conductive discharge electrode 20 inside the transparent quartz tube 10 and the conductive counter electrode provided on the outer surface of the transparent quartz tube 10 and in direct contact with water The transparent quartz tube 10 is present between the 30 and the inside of the transparent quartz tube 10, that is, the inner diameter of the transparent quartz tube 10 and the transparent quartz tube 10 and are inserted into the transparent quartz tube 10. Injecting gas or air into the space formed between the outer diameter of the conductive discharge electrode 20 located in the center of the inner diameter by the pressure of the inside of the transparent quartz tube 10 and the conductive discharge electrode 20 By blocking the converter by creating a space between the lower end and the water, it prevents a short circuit between the conductive discharge electrode 20 and the water and at the same time generates a plasma in the space.

At this time, plasma is generated in the transparent quartz tube 10.

     First, since the conductive counter electrode 30 provided on the outer surface of the transparent quartz tube 10 is in direct contact with water, a material body plays a role of one conductive electrode, so that charging occurs and discharges in the air. One of the glows or streamers is formed. It is not necessary to activate a gas or air injected into the space between the transparent quartz tube 10 and the conductive discharge electrode 20.

     The regulator is a means for controlling the injection of air or gas, by adjusting the gas or air into the space between the transparent quartz tube 10 and the conductive discharge electrode 20 of the underwater plasma reactor.

     In addition, the commercial electronic neon transformer is a high voltage applying means for generating a plasma, and the conductive discharge electrode 20 and the conductive counter electrode 30 are 7 [kV]-15 [kV], 20.0 [kHz]-23 [ kHz].

     Hereinafter, the action to stably generate the high density plasma of the present invention in water will be described in more detail. The power source used in the present invention is a commercial electronic neon transformer having a high frequency of 20.0 [kHz] to 23 [kHz]. Pulse AC power supply. When a power is applied between the conductive discharge electrode 20 and the conductive counter electrode 30 with a dielectric tube (transparent quartz tube 10) applied, the charge is caused by the capacitance of air and the dielectric tube (transparent quartz tube 10). Current, leakage current due to insulation resistance, and current for supplying dielectric loss are important in this case. The dipole conduction current generated by the phenomenon in which the dipole molecules try to turn in the direction of the electric field is important. 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. In addition, when the height of the conductive counter electrode 30 is present at the lower end of the tip of the conductive discharge electrode 20, an electric field is concentrated at the tip of the conductive discharge electrode 20 and the arc discharge occurs. In addition, the efficiency of the non-discharge area increases, and the efficiency decreases. When exposed to the water or water particles and the liquid level introduced into the transparent quartz tube 10, the vibration of the liquid level, a portion of the surface rises or recesses, and the insulation is easily broken. Therefore, by placing the height of the conductive counter electrode 30 at the top of 2 [mm] to 7 [mm] at the tip end of the conductive discharge electrode 20, the electric field concentration coefficient is alleviated to maintain a stable discharge area.

     Therefore, a conductive phenomenon occurs between the conductive discharge electrode 20 and the conductive counter electrode 30 to generate a high density plasma and to form a strong electric field in water to efficiently inject plasma energy into water.

     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 20 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. That is, on the basis of 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 20 and the conductive counter electrode 30) must be very important factors for plasma generation. The distance between the electrodes (the conductive discharge electrode 20 and the conductive counter electrode 30) is simply controlled and the plasma intensity can be adjusted by appropriately adjusting the distance of the electrodes (the conductive discharge electrode 20 and the conductive counter electrode 30) as necessary. It is natural to be able to control. On the other hand, the separation distance between the quartz tube and the counter electrode is about 15 ~ 35mm. 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 strength of the voltage, air, and gas pressure can be very flexible, so that the user must adjust the intensity of the voltage and gas pressure appropriately to obtain the appropriate intensity of the plasma.

In addition, the present invention generates a mixture of H +, O ₃ , radicals, and ions and these by-products are directly injected into the water to generate a large amount of active species, such as high concentrations of OH, H ⁺ , H ₂ O ₂ , halo and various radicals In addition, ultraviolet rays and plasma energy radiated between the transparent quartz tube 10 and the conductive counter electrode 30 may be directly irradiated to the object to be treated.

     The dense porous bubble device is a means for promoting an oxidation reaction, which is connected to the lower end of the transparent quartz tube 10 and generates bubbles of a micron size in order to increase the contact oxidation reaction by increasing the contact time and the contact surface area with water. Let's do it. In other words, bubbles containing a large amount of highly active radicals generated through high-density plasma do not clump together and are finely divided to drift in 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.

     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. To build an underwater plasma reactor included in the high density underwater plasma torch generator according to.

     In addition, the fluidity of the plasma to be used is increased by controlling the position and distance of the conductive discharge electrode 20 and the conductive counter electrode 30 inserted into the transparent quartz tube 10.

     In addition, by blocking the path to the water by the air or gas pressure injected through the regulator connected to the gas inlet 42, the plasma is generated and maintained stably in the water.

     In addition, the conductive discharge electrode 20 and the conductive counter electrode 30 are connected to a terminal of a commercial electronic neon transformer to apply power of 7 [kV] to 15 [kV] and 20.0 [kHz] to 23 [kHz] to achieve high density. It generates a streamer plasma.

     In addition, when the air or gas injected in the previous step is activated in the plasma region is injected into the water immediately.

     In addition, at the lower end of the transparent quartz tube 10, the contact time with water through a dense porous bubble device that generates bubbles of micron size in order to increase the diffusion effect and the contact oxidation method of the radicals and gases from the high density plasma. And increasing the contact surface area to purify the contaminated water.

     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 having a simple structure, a regulator for injecting and regulating air or gas, and a commercial electronic for generating high voltage, low power, and low cost plasma. By constructing a compact porous bubble device that promotes the neon trans and oxidation reaction, it minimizes the cost of power and devises an underwater plasma reactor with a simple structure, making it easy to operate and install as well as easy to repair and repair in the event of failure. 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 a dense porous bubble device at the lower end of the transparent quartz tube 10, by increasing the contact time and the contact surface area with water, the diffusion effect and the catalytic oxidation of activated radicals and gases, etc., generated through the high-density plasma of the reactor It is possible to significantly increase the 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 purification method.

     Therefore, the present invention forms a strong electric field by installing a plasma torch in water to generate plasma, and bubbles are generated in water by airstone, so that the radicals and gases activated in the plasma region are well dispersed and the catalytic oxidation reaction is increased. As a result, environmental pollutants can be easily and reliably removed.

10: transparent quartz tube 20: conductive discharge electrode
30 conductive counter electrode 40 torch cap
41 electrode tip hole 42 gas inlet
43: opposing electrode inlet 44: screw assembly hole
50: Air Stone

Claims (5)

In the plasma torch installed in water, the plasma torch is inserted into the transparent quartz tube 10, the transparent quartz tube 10, the conductive discharge electrode 20 having a discharge electrode gap in the radial direction and the transparent quartz tube and And a conductive counter electrode 30 spaced apart from the transparent quartz tube 10 to form a high density plasma region by concentrating the maximum potential hardness of the conductive discharge electrode 20 and an upper end of the transparent quartz tube 10. An electrode tip hole 41, which is assembled into the electrode and fixes the conductive discharge electrode 20 to the inside of the transparent quartz tube 10, the gas inlet 42, and the opposite electrode inlet 43 into which the conductive counter electrode 30 is introduced. Underwater installation plasma torch structure comprising a torch cap 40 is formed The torch cap 40 has an electrode tip hole 41, a gas inlet 42 and a counter electrode inlet 43, wherein the gas inlet 42 is a horizontal hole toward the side of the torch cap. Underwater installation plasma torch structure, characterized in that consisting of a vertical hole communicated to the lower part of the torch cap after the perforated 2. The underwater installation according to claim 1, wherein the conductive counter electrode 30 has a straight line shape and is disposed in parallel with the transparent quartz tube 10 in which the conductive discharge electrode 20 is inserted to form a plasma region. Plasma Torch Structure The plasma torch structure of claim 1, wherein an air stone (50) generating air is coupled to a lower end of the transparent quartz tube (10). The plasma torch structure of claim 1, wherein a transparent acrylic tube is used instead of the transparent quartz tube.

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