KR20010019648A - High Density Plasma Generating Device - Google Patents

Abstract

PURPOSE: A device for generating a high density plasma is provided to purify dioxin, VOC and contaminants contained in exhaust gas. CONSTITUTION: In a device for generating a high density plasma, a housing in which a catching part(2) and a vent hole are formed is engaged and fixed with a case(8). Ceramic insulating rings(10,12,14,18) inside the housing are applied and fixed. A vent hole(22) is formed at a jaw part of insulating rings(6,14). An anode plate(24) for closing a plurality of anode electrodes and a cathode plate(20) for closing a plurality of cathode electrodes are engaged and mounted. Feeders(26,28) with a HV are connected to the cathode plate and the anode plate. The anode electrode comprises an anode baton(30) having a conductivity. The cathode electrode comprises a cathode tube(32) having a conductivity. The anode baton having an outer diameter smaller than an inside diameter of the cathode tube is engaged inside the cathode tube. The vent hole(34) is formed between the cathode tube and the anode baton so that the anode baton and the cathode tube are not contacted to each other.

Description

High Density Plasma Generating Device

The present invention uses a high-density plasma discharge, NOx, SOx, CO, unburned hydrocarbons (CH), soot, dust, various gases such as general industrial gas and various wastewater and wastewater contained in the incinerator exhaust gas, etc. The present invention relates to a high-density plasma generating device capable of effectively purifying and removing fluoride. In detail, a plasma discharge chip having a sharp tip is formed at the end of a positive electrode so that discharge charges are concentrated. In the tubular negative electrode installed around the discharge chip, a plurality of discharge holes are formed at appropriate intervals so that high density plasma is generated.

In general, plasma can be generated by flowing a voltage of several thousand to tens of thousands of volts and a current of several A to several A between a cathode and an anode punched in a planar conductor plate. The plasma thus generated is composed of ion radical electrons and is called a fourth state of matter following a gas, a solid and a liquid. At this time, when a corona discharge occurs between the positive electrode and the negative electrode, anions are mainly generated, and when a spark discharge occurs, ozone (O ₃ ) is mainly generated.

Such plasma is used in the diesel vehicle exhaust gas purification device (Patent No. 10 ?? 0188234) using the plasma discharge invented by the present inventor, and the purification of the exhaust gas in the air purifier incinerator and the purification of high concentration industrial wastewater, livestock wastewater, and landfill leachate It can also be used.

On the other hand, Patent No. 10-0188234, registered by the present inventor (January 11, 1999), "Exhaust gas purification apparatus for diesel vehicles using plasma discharge" has a conductive end face inside a tubular negative electrode. The discharge electrode is formed by combining the cut bar-shaped positive electrode, which leads to the problem that the discharge charges are not concentrated and are dispersed. Therefore, the discharge electrode is not only short-lived but also has low discharge efficiency. There was a problem such as poor efficiency.

Therefore, the present invention invents a high-density plasma generator for the purpose of purifying these polluted gases and wastewater, and at the same time, dioxins and unburned volatile organic compounds (VOC) contained in the incinerator exhaust gas and pollutants in the wastewater. It is an object of the present invention to provide a high-density plasma generator capable of purifying and processing.

In order to achieve the above object, in the present invention, a plurality of small holes are formed in a plurality of rows around the cathode tube, and a high-density plasma is generated by placing a discharge chip having a sharp tip at the end of the anode rod on the center line of the cathode tube. .

In addition, in the incinerator exhaust gas purification plasma apparatus, a plurality of small holes are installed in several rows around the cathode tube, and similarly, a plurality of pyramidal discharge chips are formed on the surface of the anode rod and the discharge holes are formed in the cathode tube 1: By coping with 1, dioxin, unburned volatile organic compounds (VOC) and various contaminants in dust and wastewater contained in the incinerator exhaust gas are effectively oxidized and decomposed using a high density plasma discharge flame.

The present invention is to install and purify the plasma type purifier with high exhaust gas purification efficiency in the exhaust gas exhaust path of the diesel vehicle, but the plasma discharge chip is a bed end with a metal or metal alloy excellent in acid resistance, wear resistance and electrical conductivity It is formed so as to greatly increase the purification efficiency of the exhaust gas.

The plasma purification apparatus of the present invention boosts the vehicle battery (or generator) or commercial power source of 12V or 24V to 3,000V ~ 25,000V by the high voltage generator (HV), and then supplies them to a plurality of discharge chips installed by corona discharge. The plasma is generated to be used for exhaust gas, wastewater and wastewater purification equipment of diesel vehicles.

At a high voltage of 3,000 V to 25,000 V, the blue-powered plasma is generated and the exhaust gas purification efficiency is further increased. Since the generated plasma is discharged by a large force of a long length, the purification efficiency of exhaust gas, soot or wastewater is very excellent, and when installed in a vehicle, it has the advantage of maximizing the purification efficiency from the beginning of the start.

In addition, in the present invention, by installing two or more high-density plasma generators in series, in parallel, or in a series / parallel mixing type, it is possible to maximize the purification efficiency of the exhaust gas or the waste water, and the plasma discharge chips are installed in a plurality of exhaust fumes. By reducing the discharge resistance of the gas to the maximum, there is no increase in the load of the engine due to the discharge pressure and administrative failure factors, and in the case of the wastewater treatment system, a large amount of negative ions are supplied to maximize the purification efficiency.

1 is a cross-sectional view of an embodiment of the present invention.

2 is a sectional view of main parts of the present invention.

3 is a partial external perspective view of the cathode tube of the present invention.

4 is a cross-sectional view of another embodiment of the present invention.

5 is an exploded perspective view of the cathode tube and the anode rod of the present invention FIG.

6 is a cross-sectional view of main parts of the present invention FIG. 4.

7 is an exemplary view of a use state of the present invention.

8 is an illustration of another use state of the present invention.

<Description of the code | symbol about the principal part of drawing>

(1) (1a)-High Density Plasma Generator (2)-Hanging Part

(4) (22) (34)-Aerator (6)-Housing

(8)-case (8a)-air supply

(8b)-Exhaust port (10) (12) (14) (16)-Insulation ring

(18)-cover ring (20)-cathode plate

(24)-anode plate (26) (28)-feeder

(30) (30a)-anode rod (32) (32a)-cathode tube

(36) (42)-Discharge Chips (38) (38a) (38)-Discharge Holes

(40)-Discharge part of discharge hole (P)-Plasma

(HV)-High Voltage

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional configuration diagram of the high-density plasma generating device 1 of the present invention, in which a housing 6 having a locking portion 2 and a large-diameter vent hole 4 is fitted into a case 8 to fix the housing 6. A plurality of ceramic insulating rings (10) (12) (14) (16) are stacked inside the cover) and then covered with a cover ring (18) to be fixed, and a plurality of cathodes are fastened to the stepped portions of the insulating ring (6). The cathode plate 20 is inserted and installed, and a plurality of vent holes 22 are formed in the stepped portion of the insulating ring 14, and the anode plate 24, to which the plurality of positive electrodes are fastened, is inserted into the cathode plate 24. In the plasma discharge device in which the negative electrode plate 20 is spaced and insulated in the housing 6, and the feed lines 26 and 28 to which the high voltage portion HV is connected to the negative electrode plate 20 and the positive electrode plate 24 are connected. In this case, the positive electrode is constituted by a rod-shaped positive electrode rod 30 having conductivity, and the negative electrode is constituted by a tubular cathode tube 32 having conductivity. Inside the cathode tube 32, the anode rod 30 having a smaller outer diameter than the inner diameter of the cathode tube 32 is coupled, but the anode rod 30 and the cathode tube 32 are spaced apart from each other so as to be spaced between the vent holes therebetween. 34 is formed.

The high voltage unit HV boosts a 12V or 24V car battery (or a generator) or a commercial power supply with a high voltage unit HV at a voltage of 3,000V to 25,000V and a few μA to several A current, and then Supply to the negative electrode plate 20 to generate a plasma by the corona discharge.

On the other hand, the end of the anode rod 30 is to form a needle-shaped plasma discharge chip 36 with a sharp tip as shown in Figure 1, the lower portion of the cathode tube 30 where the discharge chip 36 is located 2, as shown in FIG. 3, a plurality of discharge holes 38 are formed at narrow intervals, and the lower end portion of the cathode tube 32 protrudes slightly downward than the anode rod 30 to form a discharge hole 38a positioned at the center portion thereof. Corona discharge is generated up and down at the center to obtain a high density of plasma P and a large amount of negative ions by the action of the plasma.

The discharge hole 38 may be installed in the cathode tube 32 as a whole, but since concentration of charge may be dispersed and discharge efficiency may be reduced, the discharge hole 38 may be disposed around the discharge chip 36 in which discharge charge is concentrated. Install it intensively.

In addition, as shown in FIG. 2, since the discharge portion 40 of the discharge hole 38 also has a corner structure that forms an angle of about 90 °, the discharge charges are concentrated and thus corona discharge efficiency is polarized and thus high density (high) is achieved. A plasma P of low magnitude is generated, and the air of the air vent 36 is negatively ionized by the action of the plasma and discharged.

Since the discharge chip 38 having a sharp tip may be shortened by precipitation (elution) and abrasion, the portion of the plasma discharge chip 38 may be formed of a conductive antioxidant material or coated on the surface of the oxide film. The lifespan of the plasma discharge chip 38 is extended by forming

In addition, even if discharge heat is generated by corona discharge, a large amount of air is supplied to the air vents 22, 4, and 36 by an air pressure source (not shown), thereby preventing overheating of the anode rod 32 and the cathode tube 34. In addition, since an air pressure difference is generated between the inside and the outside of the cathode tube 34 due to the flow rate of the air flowing through the vent hole 36, the air located outside the anode rod 32 passes through the discharge hole 46. Since it is introduced into the inside of the anode rod 32 and the cathode tube 34 is made of heat radiation.

4 to 6 are cross-sectional views and exploded perspective views of another embodiment of the high-density plasma generator 1a of the present invention. The pyramidal plasma discharge chips 44 are formed in the longitudinal direction and the circumferential direction of the anode rod 30a. It is formed at a close interval and rounded, and the cathode tube 32a is formed at a position corresponding to 1: 1 with the discharge chip 44 of the anode rod 30a in a circle to form the anode rod 30a. Corona discharge is generated over the entire cathode tube 32a, and the life of the anode rod 30a and the cathode tube 32a can be greatly extended without an antioxidant film.

7 and 8 show the density of plasma by providing one or more of the present invention high density plasma generating apparatus 1 (1a) in the case 8 in which the air supply port 8a and the exhaust port 8b are formed. It can be further strengthened, and the exhaust port (8b) discharged a large amount of negative ions may be connected to the air purifier, incinerator, high concentration industrial wastewater, livestock wastewater, landfill leachate, or injected or installed to purify.

In the present invention, the material of the anode rod 30, the cathode tube 32, the anode plate 20, the cathode plate 24 and the discharge chip 36, 44 is molybdenum, tungsten, nickel, platinum or nickel, molybdenum, copper The anode plate 20 and the cathode plate 24 to which the anode rod 30 and the cathode tube 32 are fixed are also formed of the same material as that of the above-mentioned material, so as to be made of an alloy having excellent heat resistance, acid resistance, and conductivity. And the thermal expansion coefficient is the same, while being excellent in electroconductivity.

Reference numeral 48, 50 is a feed line insulation insulator, 52 is a piece.

Effects of the present invention configured as described above are as follows.

Formula 1

The oxidation (combustion) reaction of carbon monoxide (CO) is given by the following equation (1).

2CO + O ₂ → 2CO ₂ ----------------------------------------------------------- Formula (1)

Combustion of unreacted hydrocarbons (HC: CnH ₂ n + ₂ ) takes place as shown in the following equation (2).

Formula 2

m.CnH ₂ n + 2 + 1/2 m (n + ₃ ) O ₂ → ₂ m.CO ₂ + m (n + 1) H ₂ O ------------------ -Equation (2)

Where m is the mole number of the unreacted hydrocarbon.

NOx contained in the incinerator exhaust gas is reduced to nitrogen (N ₂ ) and oxygen, which are harmless to animals and plants, as shown in the following equations (3) and (4).

Formula 3

2NO → N2 + O2 --------------------------------------------- Formula (3)

Formula 4

2NO ₂ → N2 + 2O ₂ ------------------------------------------- -Formula (4)

And the carbon dust (C _(s) ) dispersed in the exhaust gas is oxidized as shown in the following equation (5) to change into carbon dioxide gas (CO ₂ ).

Formula 5

C (s) + O ₂ (g) → CO ₂ (g) ---------------------------------- --- Equation (5)

Where s and g in parentheses denote solid and gas states.

Among the above reaction formulas, in particular, in the case where the "catalyst combustion plate" made of the metal honeycomb of the patent application No. 97-15145 filed by the applicant (inventor) has been filed before the present invention, the equation (3), ( As shown in 4), the NOx removal efficiency can be further increased.

In the practice of the present invention, it is not necessarily used only for the incinerator exhaust gas purification device, but may be used for the purification and removal of soot gas, dust, exhaust gas, etc., in oil burners, gas burners, diesel engines, and thermal power plants. Various wastes, wastewater and the like can be effectively purified and removed by a high density plasma, and the effects thereof are of course identified.

As described above, the present invention can drastically purify various exhaust gases (polluted gases) and wastewater by high density plasma, and thus, it is possible to significantly reduce various environmental pollutions caused by exhaust gases and wastewater. .

In the present invention, the anode rod 30 and the cathode tube 32 are screwed to the electrode plates 20 and 24, and the housing 10 may also be disassembled and coupled, so that the replacement of the electrodes 30 and 32 may be performed. There is an easy advantage.

Claims (6)

The housing 6 having the locking portion 2 and the ventilation hole 4 formed therein is fixed to the case 8, and the ceramic insulating rings 10, 12, 14 and 16 are inserted into the housing 6. Laminated and fixed, the ventilation hole 22 is formed in the stepped portion of the insulating ring (6) (14), the positive electrode plate 24 to which a plurality of positive electrodes are fastened and the negative plate 20 to which a plurality of negative electrodes are fitted A plasma discharge device in which a feed line (26) (28) connected with a high voltage portion (HV) is connected to a cathode plate (20) and a cathode plate (24); The positive electrode is composed of a conductive rod-shaped anode rod 30, and the negative electrode is composed of a conductive tubular cathode tube 32, and the inside of the cathode tube 32 is relatively smaller than the inner diameter of the cathode tube 32. Coupled to the anode rod 30 having a positive electrode rod 30 and the cathode tube 32 is installed so as not to contact each other spaced apart so as to form a vent hole 34 therebetween. The plasma discharge chip 36 having a sharp tip is formed at the end of the anode rod 30, and the plurality of discharge holes 38 are formed in the lower portion of the cathode tube 30 where the discharge chip 36 is located. ) Are formed at narrow intervals, and the lower end of the cathode tube 32 protrudes slightly downward from the anode rod 30 so that a high-density plasma P is formed up and down around the discharge hole 38a positioned at the center thereof. High density plasma generator, characterized in that the generation. The high-density plasma generating apparatus according to claim 1 or 2, wherein the discharge holes (38) (38a) have corner structures having an angle of about 90 degrees. The discharge chip of the anode rod 30a according to claim 1 or 2, wherein the pyramidal plasma discharge chips 44 are formed at close intervals in the longitudinal direction and the circumferential direction of the outer surface of the anode rod 30a. Discharge holes 46 are formed in the cathode tube 32a at a position corresponding to 1: 1 with the 44 so that a full corona discharge is generated to the anode rod 30a and the cathode tube 32a. High density plasma generator. The density of the plasma according to claim 1 or 2, wherein the high-density plasma generating apparatus (1) (1a) is provided in one or more pieces in the case (8) in which the air supply port (8a) and the exhaust port (8b) are formed. High density plasma generator, characterized in that to further enhance the. The high voltage unit (HV) according to claim 1 or 2, wherein the high voltage portion (HV) is stepped up with a current of several A at a voltage of 3,000 V to 25,000 V and several μA, and then supplied to the positive electrode plate 24 and the negative electrode plate 20 to generate a corona discharge. High-density plasma generator that allows plasma to be generated.