KR20230164777A - Plasma processing System for foul smelling gas - Google Patents

Abstract

The present invention provides a M/W plasma burner system that provides purified material by performing primary combustion/oxidation/destruction/decomposition treatment on the introduced target material using microwaves, and primary treatment in the MW plasma burner system. A high-temperature plasma system including a gliding arc plasma burner system for secondary combustion/oxidation/destruction/decomposition of the target material using gliding arc plasma; A PM dust collection system that collects fine dust from the primary and secondary treated materials through the high-temperature plasma system: generates plasma with a first DBD plasma device and uses the high concentration of ozone and OH radicals generated at this time to collect the PM dust. A first low-temperature plasma system that processes the target material with fine dust collected in the dust collection system and the target material that is primarily treated through the mesh-type plasma scrubber is filtered through an adsorption tower composed of a multi-stage adsorbent layer and a second DBD plasma device. A low-temperature plasma comprising a second low-temperature plasma system that irradiates the plasma generated through the surface of the photocatalyst layer formed at the top of the adsorption tower to generate active O-H radicals and secondaryly processes the target material through the generated active O-H radicals. Provides a plasma three-stage complex system including a system.

Description

Plasma 3-stage complex system {Plasma processing System for foul smelling gas}

The present invention relates to a plasma combustion oxidation system, and more specifically, to a plasma that can efficiently treat odorous gases, VOCs, and harmful toxic substances through three sequential steps: high-temperature plasma treatment, ceramic dust collection treatment, and low-temperature plasma treatment. It is about a three-level complex system.

Currently, there are about 440,000 manufacturers and factories across the country due to the construction of various industrial complexes in each local government and rapid industrialization. There are over 130,000 material handling businesses nationwide.

In addition, emissions of hazardous pollutants are increasing in small and medium-sized businesses (4 to 5 types) and direct-fired restaurants according to the workplace classification standards for each industry in accordance with the Enforcement Decree of the Air Quality Conservation Act.

Accordingly, the issue of securing the right to health for residents of target areas continues to be raised, and various environmental complaints and damage to crops are also increasing.

In particular, odorous gases and harmful toxic substances not only cause discomfort by stimulating the human sense of smell, but also have a harmful effect on health. In addition, volatile organic compounds (VOCs), which are emission precursors along with odorous gases, have high vapor pressure and are easily evaporated into the atmosphere. They cause photochemical reactions with nitrogen oxides (NOx) in the atmosphere, causing photochemical smog, destroying the ozone layer in the atmosphere and destroying human bodies. may have a negative impact.

To remove these odorous gases, VOCs, PAHs, and HAPs, activated carbon adsorption and removal method, detergent absorption method, flame oxidation combustion method, catalytic oxidation method, chemical oxidation method using ozone, decomposition method using low-temperature plasma, and biological filtration (bio-filtration). Although technologies using this method are being developed, there are limits to effectively removing hazardous toxic substances, VOCs, and non-decomposable odor gases.

Korean Patent No. 10-1400669 (announced on May 29, 2014) Korean Patent Publication No. 10-2010-0069213 (published on June 24, 2010) Korean Registered Patent No. 10-1815382 (registered on December 28, 2017) Korean Patent Publication No. 10-2020-0122142 (published on October 27, 2020)

The present invention is intended to solve the problems described above, and is a plasma that can efficiently treat odorous gases, VOCs, and harmful toxic substances through three sequential steps: high-temperature plasma treatment, ceramic dust collection treatment, and low-temperature plasma treatment. The purpose is to provide a three-stage complex system.

For this purpose, the present invention provides a M/W plasma burner system that provides purified material by primary combustion/oxidation/destruction/decomposition of the introduced target material using microwaves, and in the MW plasma burner system A high-temperature plasma system including a gliding arc plasma burner system for secondary combustion/oxidation/destruction/decomposition of the primary treated target material using gliding arc plasma; A PM dust collection system that collects fine dust from the primary and secondary treated materials through the high-temperature plasma system: generates plasma with a first DBD plasma device and uses the high concentration of ozone and OH radicals generated at this time to collect the PM dust. A first low-temperature plasma system that processes the target material with fine dust collected in the dust collection system and the target material that is primarily treated through the mesh-type plasma scrubber is filtered through an adsorption tower composed of a multi-stage adsorbent layer and a second DBD plasma device. A low-temperature plasma comprising a second low-temperature plasma system that irradiates the plasma generated through the surface of the photocatalyst layer formed at the top of the adsorption tower to generate active O-H radicals and secondaryly processes the target material through the generated active O-H radicals. Provides a plasma three-stage complex system including a system.

The present invention makes it possible to efficiently treat odorous gases, VOCs, and harmful toxic substances through three sequential steps: high-temperature plasma treatment, ceramic dust collection treatment, and low-temperature plasma treatment.

At this time, the high-temperature plasma combustion oxidation system continuously performs combustion and oxidation reactions in the M/W plasma burner system at the front and the gliding arc plasma burner system at the rear to remove non-decomposable gas substances, harmful toxic substances, odor gases, VOCs, PAHs, After HAPs are decomposed through combustion and oxidation, the treated clean material is discharged through the outlet, making it environmentally friendly.

In addition, the ozone generated from the DBD plasma flexible electrode device can move to the chamber and perform a purification action by removing microorganisms such as odors, bacteria, and mold contained in the target material.

In addition, plasma reaction and UVA are irradiated to the surface of the active photocatalyst/photocatalyst filter through a low-temperature DBD plasma device, which causes a photocatalytic reaction to generate active O-H radicals. The generated active O-H radicals have a strong oxidizing power and are effective in completely removing complex pollutants of various molecular sizes and characteristics.

1 is a diagram showing the concept of a plasma three-stage complex system according to the present invention,
Figure 2 is a diagram showing the configuration of the plasma three-stage complex system of Figure 1;
Figure 3 is a diagram showing the configuration of the PTO plasma combustion oxidation system according to the present invention;
Figure 4 is a diagram showing the configuration of the microwave plasma generator in the PTO plasma combustion oxidation system of Figure 3;
Figure 5 is a diagram showing the configuration of the gliding arc plasma generator in the PTO plasma combustion oxidation system of Figure 3;
6 is a diagram showing the configuration of a ceramic PM dust collection system according to the present invention;
Figure 7 is a diagram showing the configuration of a ceramic filter in the ceramic PM dust collection system of Figure 6;
Figure 8 is a diagram showing the configuration of a low-temperature plasma system according to the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

Although first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be a second component within the technical spirit of the present invention.

Like reference numerals refer to like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the components shown.

Each feature of the various embodiments of the present invention can be partially or fully combined or combined with each other, and as can be fully understood by those skilled in the art, various technical interconnections and operations are possible, and each embodiment may be implemented independently of each other. It may be possible to conduct them together due to a related relationship.

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

The present invention relates to a three-stage plasma complex system for treating odorous gases and hazardous toxic substances, and can be largely comprised of a high-temperature plasma system, a ceramic dust collection system, and a low-temperature plasma system.

Here, the plasma three-stage complex system according to the present invention provides purified gas or materials by burning/oxidizing/destructing/decomposing odorous gases, VOCs, and harmful toxic substances generated in industrial facilities such as factories, restaurants, etc. Provides an eco-friendly system. Here, odorous gases, VOCs, harmful toxic substances, etc. generated in industrial facilities such as factories, restaurants, etc. are hereinafter referred to as “target substances.”

FIG. 1 is a diagram showing the concept of a three-stage plasma complex system according to the present invention, and FIG. 2 is a diagram showing the configuration of the three-stage plasma complex system of FIG. 1.

Referring to Figures 1 and 2, the plasma three-stage complex system according to the present invention is largely divided into the first stage of the PTO plasma combustion oxidation system using high-temperature plasma, the second stage of the ceramic PM dust collection system, and the mesh-type plasma using low-temperature plasma. The target material is purified through a three-step treatment process using a scrubber and a DBD plasma/activated photocatalyst system.

First, we will look at the PTO plasma combustion oxidation system using high-temperature plasma in the first stage.

FIG. 3 is a diagram showing the configuration of the PTO plasma combustion oxidation system according to the present invention, FIG. 4 is a diagram showing the configuration of the microwave plasma generator in the PTO plasma combustion oxidation system of FIG. 3, and FIG. 5 is a diagram showing the configuration of the PTO plasma combustion oxidation system of FIG. 3. This is a diagram showing the configuration of the gliding arc plasma generator in the system.

Referring to Figure 3, the PTO plasma combustion oxidation system according to the present invention is largely purified by primary combustion/oxidation/destruction/decomposition treatment of the target material introduced into the first combustion furnace using microwaves. A microwave plasma burner system that provides gas or material, and secondary combustion/oxidation/destruction/decomposition processing of the target material that has been primarily processed in the microwave plasma burner system using gliding arc plasma in a second combustion furnace to an exit. It may be composed of a gliding arc plasma burner system that provides purified gas or material through. Here, Microwave is hereinafter abbreviated as "M/W", and the gas or material purified by combustion/oxidation/destruction/decomposition treatment of the target material is hereinafter abbreviated as "processed material". It can be marked.

In addition, the PTO plasma combustion oxidation system according to the present invention is a process using high temperature plasma, and the plasma treatment process in the first M/W plasma burner system and the plasma treatment process in the second gliding arc plasma burner system are sequential processes in a continuous process. To this end, the first combustion furnace and the second combustion furnace are connected to each other so that a continuous and sequential plasma process can be performed.

Looking at this in detail, the target material flowing in through the target material inlet (IN) is continuously burned/oxidized/destructed/decomposed through primary and secondary combustion oxidation reactions in the M/W plasma burner system and the gliding arc plasma burner system. is removed, and the treated material is discharged into the atmosphere through the gas outlet at the rear end.

With reference to FIGS. 3 to 5, the M/W plasma burner system will first be described, and then the gliding arc plasma burner system will be described.

First, the M/W plasma burner system is connected to a waveguide 123 that transmits M/W generated from the M/W generator 101, and is located at the end of the waveguide 123 and penetrates the waveguide 123. a first combustion furnace 100, a target material injection unit (IN) as an inlet passage through which the target material flows into the first combustion furnace 100, and M/W provided within the first combustion furnace 100. An ignition unit 122 that ignites plasma to generate a plasma torch, and a fuel injection unit (not shown) that injects hydrocarbon-based fuel into the plasma torch generation area of the first combustion furnace 100. Equipped with

At this time, the first combustion furnace 100 is connected to the waveguide 123 as a discharge pipe, and a plasma flame is generated in the plasma torch generation area (discharge space) within the discharge pipe by the M/W transmitted through the waveguide 123. occurs. At this time, plasma is generated within the discharge tube, and the introduced target material can be supplied to the discharge space and burned/oxidized/destructed/decomposed.

Additionally, the first combustion furnace 100 may use a tubular reactor made of a material such as quartz or glass. Here, the tubular reactor made of quartz is supported through a quartz holder 110.

In addition, the flame can be amplified using plasma fuel to increase the combustion temperature to a high level, making it possible to form a flame at a higher temperature than a regular gas burner. For this purpose, it is connected to the fuel injection unit and configured to inject fuel gas consisting of hydrocarbons (hydrocarbon-based fuel). Here, LPG, LNG, kerosene, etc. can be used as hydrocarbon fuels, and by generating plasma with low energy and injecting a certain amount of hydrocarbon fuel, a complete combustion reaction can proceed quickly. At this time, the operating temperature in the M/W plasma combustion oxidation system is 900 to 1,600°C, providing a very high combustion temperature. In this way, a large volume of target materials can be efficiently processed within a short period of time using flames generated by combustion of fuel gas made of hydrocarbons.

In addition, discharge gas, such as air, oxygen, steam, etc., may be injected into the discharge space of the first combustion furnace 100 through the target material injection portion or fuel injection portion, and a gas containing an oxidizing agent may be used as the discharge gas to produce 2000 It can provide a flame volume of ℃ or higher, reaching a temperature 50 times higher than that of arc plasma.

In addition, M/W of a preset frequency is supplied from the discharge space of the first combustion furnace 100 to generate plasma within the discharge space. For this purpose, the waveguide 123 and the microwave plasma generator are connected.

Here, the microwave plasma generator includes a M/W generator 101 that receives driving power supplied from the outside and generates M/W power, and a portion of the power generated through the M/W generator 101. An isolator (109) that fixes the flow of power in one direction to prevent damage to the magnetron due to reflected parts, and a first combustion furnace (100) installed in communication on one side of the M/W generator and on the other side. ) and is provided with a waveguide 123 as a passage through which the generated M/W moves. At this time, the first combustion furnace 100 is connected to the end of the waveguide 123.

In addition, the intensity of the incident and reflected waves of the M/W output from the isolator 109 and the coupler 107 are adjusted to induce impedance matching, so that the electric field induced by the M/W is maximized within the discharge tube. It further includes a stove tuner (107). At this time, the two-way coupler 108 is used to receive the M/W generated by the M/W generator 101 and transfer it to the discharge tube while separating or combining the received M/W. In addition, the reflected power of M/W that is not absorbed in the reaction space of the discharge tube is attenuated. In addition, the M/W reflection force passing through the two-way coupler 108 reacts again in the discharge tube, and the remaining M/W that has not reacted in the discharge tube is absorbed through the 3-stub turner.

In addition, a M/W plasma burner control unit that controls the microwave plasma generator to control the M/W power provided to the first combustion furnace 100 through the waveguide is further provided. At this time, the M/W plasma burner control unit is a flowmeter box 103 that measures the flow rate, such as mass or volume, as the injection amount of the hydrocarbon-based fuel provided to the first combustion furnace 100 or the inflow amount of the target material. Wow, there is an indicator (112) with built-in status display LED and unit display LED to display the current operating status and status of data setting, modification, etc., and the status value displayed through the indicator is used to set M/W power or It is equipped with an MCU (114) that controls the injection amount of fuel or the inflow amount of target materials, and a power supply device (113) that applies driving power to the M/W generator. At this time, high voltage alternating current power may be applied to the power supply device 113.

In addition, the microwave plasma generator is equipped with a cooling fan 111 as a cooling device, and an oil compressor 104 and a chiller 105 are provided at the bottom of the chamber as cooling devices for the entire PTO plasma combustion oxidation system to form a reaction chamber. The temperature can be adjusted.

Referring to Figures 3 to 5, the primary function of the primary M/W plasma burner system is to process the target material by burning it with high-temperature plasma, and the secondary gliding arc plasma burner system also oxidizes the target material through high-temperature plasma. It can be confirmed that the treatment is particularly effective in removing volatile organic compounds (VOCs).

In other words, the secondary gliding arc plasma burner system generates a high-quality (high temperature) flame and makes it easy to remove VOC through a high-temperature oxidation reaction. Here, “Volatile Organic Compounds (VOCs)” refers to a general term for liquid or gaseous organic compounds that easily evaporate into the atmosphere due to high vapor pressure among air pollutants.

The Gliding Arc plasma burner system is connected to the first combustion furnace 100 of the primary M/W plasma burner system and has a second combustion furnace into which the target material subjected to primary combustion treatment flows, and high-voltage power. An arc is formed through discharge in the second combustion furnace, and the generated plasma is convected by reactants and pushed to the rear end of the second combustion furnace. The target material subjected to primary combustion treatment flows into the second combustion furnace from the electrode. It is provided with a gliding arc burner unit that performs secondary plasma treatment through an oxidation reaction through the generated plasma flame.

The second combustion furnace is an arc reactor in which gliding arc discharge occurs. The operating temperature is high at 900 to 1,600°C, and a tubular reactor made of a material such as quartz or glass may be used. In addition, the second combustion furnace has an external housing made of an insulating material to prevent heat release to the outside, and a refractory material or fire prevention device 118 is provided at the lower part of the arc reactor to prevent fire due to arc or plasma flame. , a dust collector 117 that collects dust resulting from combustion or oxidation reaction may be further provided.

At this time, the power supply unit may be supplied with high-voltage AC power, and may measure the flow rate such as mass or volume as the injection amount of hydrocarbon-based fuel provided to the second combustion furnace or the inflow amount of the target material through the gliding arc flow meter 102. You can.

In addition, a gliding arc burner control unit may be further provided to control the M/W power provided to the second combustion furnace by controlling the gliding arc burner unit. At this time, the power supply device may be supplied with high-voltage AC power, and may be installed separately or integrated with the power supply unit 113 of the M/W plasma burner system. In addition, the gliding arc control unit, power supply, indicator, etc. can be integrated with the M/W plasma system and installed as a single unit.

Referring to FIG. 5A, the gliding arc (G.A.) burner unit includes a gliding arc electrode bar 121 into which fuel is injected through an internal hollow, and a first electrode bar holder 120 that supports the gliding arc electrode bar 121. and a second electrode bar holder 124 connected to the first electrode bar holder 120 and equipped with an external electrode and into which discharge gas is injected, and a gliding arc supporting the second electrode bar holder 124. A body, an internal electrode 125 connected to the distal end of the gliding arc electrode bar and located inside the second combustion furnace to generate a plasma flame 126, and an arc 127 that covers the internal electrode 125 and ) is provided with a third electrode bar holder that generates. At this time, the gliding arc burner unit is a small device, and when it is configured in plural, the heat treatment effect can be increased. In the present invention, a total of 12 gliding arc burner units can be formed with 3 module electrode bars, 2 each symmetrically on the left and right. In addition, the first to third electrode bar holders are preferably made of ceramic material that has good heat resistance due to flame, etc.

Additionally, the gliding arc burner unit forms a swirl discharge through a rotating gliding arc discharge. That is, when a high voltage of alternating current is applied to the external electrode of the gliding arc burner unit and the other internal electrode, the power value increases and is converted to heat energy, thereby increasing the temperature. As a high temperature state is formed, the acceleration of electrons occurs due to the lowered density. occurs and discharge occurs.

At this time, if the plasma formed by a relatively large number of strong electrons is sufficiently ionized, discharge easily occurs.

Additionally, when the plasma escapes and discharge occurs again, a continuous discharge occurs where the discharge occurs directly at the plasma departure point rather than at the shortest distance from the electrode. In this process, a continuous discharge that occurs depending on the power supply value is formed at one end at the end of the internal electrode and at the other end at the inner wall of the external electrode, and as the power value increases, the plasma area expands.

Under this condition, high acceleration of electrons occurs in the arc line that increases in the longitudinal direction, and the generated arc plasma creates an environment for high temperature and oxygen active species generation. The generated arc plasma creates an environment of high temperature and oxygen active species generation, and can increase combustion efficiency through plasma chemical reaction with the injected fuel (LPG), thereby maximizing the effect of latent heat.

Referring to Figure 5b, the gliding arc burner system decomposes VOCs into CO ₂ and H ₂ O through a high-temperature oxidation reaction and the reaction heat can be recycled, confirming that it is effective in removing volatile organic compounds (VOCs). .

Then, after oxidation combustion reaction treatment by high-temperature combustion reaction, it is discharged to the gas outlet (OUT) through the gas transfer unit. During the discharge process, it passes through the photocatalyst beads 116 and the honeycomb-type hybrid composite catalyst system 115. Remaining unreacted odorous gases, non-decomposable substances, VOCs, and HAPs can be additionally removed.

As such, the principle of plasma combustion/oxidation reaction in the PTO system according to the first embodiment of the present invention can be summarized as follows.

In other words, the plasma combustion oxidation reaction principle is that when a high field of 10 kV/cm or more is applied between two discharge electrodes, the anode and the cathode, for an extremely short moment (within tens to hundreds of ns), a brush-like shape is generated by pulse corona discharge. A current channel is formed, which is called a streamer. High-energy electrons propagate between two electrodes at a speed of 10 ⁶ to 10 ⁷ cm/sec and collide with molecules in the electric field. In this way, molecules that collide with high-energy electrons are ionized and decomposed by high-temperature combustion oxidation into active free electrons.

In addition, the plasma burner forms a high-speed rotating flame, which can quickly increase the temperature in the combustion furnace. It is an oxidation combustion device in which plasma ions that destroy and decompose contaminants in the combustion gas are injected, and the air ratio is evenly distributed. Thus, an air supply distribution device that causes complete combustion may be further included.

Here, combustion/oxidation/destruction/decomposition is performed with PTO high-temperature plasma in the combustion furnace (discharge tube) of the M/W plasma burner and the gliding arc burner. In other words, odorous gases, non-decomposable substances, VOCs, and HAPs can be removed through the high-temperature combustion reaction while the combustion reaction and oxidation reaction proceed sequentially.

For example, PTO (Plasma Thermal Oxidation) odor reduction technology generates high-temperature plasma with low energy and can quickly proceed with a complete combustion reaction by injecting a certain amount of hydrocarbon fuel.

Additionally, the plasma flame can be amplified and the combustion furnace temperature can be increased to a higher temperature than that of a regular gas burner.

In addition, magnetron energy efficiency can be increased by more than 80%, M/W plasma transmission efficiency can be increased by more than 99%, and gliding arc transmission rate can be increased.

In addition, installation/operation costs are low, it has the effect of significantly reducing electricity costs, maintenance costs, and operating costs, and LPG, LNG, and kerosene can be selectively used.

This can maintain a high-temperature environment compared to existing RTOs, reduces plasma combustion effects and fuel costs due to the small amount of LPG used, and can be manufactured in a small size, reducing initial investment costs.

FIG. 6 is a diagram showing the configuration of a ceramic PM dust collection system according to the present invention, and FIG. 7 is a diagram showing the configuration of a ceramic filter in the ceramic PM dust collection system of FIG. 6.

Referring to Figure 3, after processing the oxidation combustion reaction through a high temperature combustion reaction through the PTO plasma combustion oxidation system according to the present invention, the remaining residue passes through the photocatalyst beads 116 and the honeycomb type hybrid composite catalyst system 115. After post-processing the target material, the target material is transferred to the dust collection system through a gas transfer unit.

Referring to FIG. 6, in the dust collection system, the target materials that are primary and secondary treated through the transfer pipe are filtered while passing through the ceramic filter 200. At this time, the ceramic filter 200 is arranged as 12 filters of 3X4, has a multi-stage or multi-layer structure, enables multi-stage filtration, is compact, and boasts a high specific surface area.

Referring to FIG _. 7, looking at the internal structure _of the ceramic filter 200, a SiC coating layer is formed on the outer surface, and _{a MnO} Accordingly, the external SiC coating layer is a surface filtration layer that can collect and filter fine dust and _NO In addition, the internal composite catalyst coating layer uses Urea as a reducing agent as a catalyst support layer to provide high dust collection and removal efficiency through SCR catalytic reaction.

In addition, as it is made of ceramic material, it can be used at high temperatures above 800℃ and is a dust collection device capable of highly efficient dust collection.

In addition, it has excellent chemical resistance, is made of non-flammable materials, is easy to replace and inspect the filter, and has a long filter life. That is, the ceramic filters 200 are arranged in an array of 12 and each is fastened through the filter holder 204, making replacement and inspection of the filters easy. In addition, by using a separator with a built-in ceramic filter 200 and introducing it into the filter with a structure that can be backwashed, filtration capacity and processing efficiency can be maximized.

This ceramic filter 200 can filter fine dust particles (Dust), SOx, and NOx dust, and can even remove particles as large as PM25.

In addition, the dust extraction method is offline, so dust extraction efficiency can be maximized, and the dust collector 202 is connected to the bottom, and the dust collector can be easily separated and fastened through the ball valve 206. It is easy to collect and clean fine dust.

Additionally, the ceramic filter 200 can be cleaned periodically through the air spray bar 203, thereby improving dust collection efficiency. At this time, an automatic timer exhaustion function is possible through the barometer sensor 205.

At this time, the air distributor 201 checks the inspection cycle of the ceramic filter 200 through the barometer 205 and is linked to the air spray bar 203 to check the numerical value with an air pulse.

In the PTO plasma combustion oxidation system according to the present invention, the emission concentration of target substances CO, NOx, SOx and VOCs is significantly reduced through continuous combustion and oxidation processes through the above-described primary M/W plasma burner system and secondary gliding arc plasma burner system. It can be lowered. Accordingly, the emission concentration of target substances is significantly low, so it is a dry treatment device with low dependence on the exhaust gas post-treatment device, but it is possible to reduce SOx and NOx by adding a ceramic PM dust collection system as an additional post-treatment filter system. This ceramic dust collection system can remove particles up to PM25 size by introducing a ceramic filter that can filter out fine particles, SOx, and NOx dust.

Figure 8 is a diagram showing the configuration of a low-temperature plasma system according to the present invention.

Referring to FIG. 8, the low-temperature plasma system according to the present invention generates plasma with a first DBD plasma device of a flexible electrode, and uses a high concentration of ozone generated at this time and OH radicals to treat the target material. A mesh-type plasma scrubber and ; The target material first treated through the mesh-type plasma scrubber is filtered through an adsorption tower composed of a multi-stage adsorbent layer, and the plasma generated through the second DBD plasma device is irradiated to the surface of the photocatalyst layer formed at the top of the adsorption tower to activate it. It consists of a DBD (Dielectric Barrier Discharge) plasma/active photocatalyst system that generates O-H radicals and performs secondary treatment of the target material through the generated active O-H radicals.

In particular, the mesh-type plasma device can effectively treat and remove nitrogen oxides (NOx) by decomposing/oxidizing NO and converting it into NO ₂ . In other words, treatment after NOx-plasma oxidation and destruction of odorous gases, harmful toxic substances, and VOCs are possible.

First, a mesh-type plasma scrubber includes a chamber into which the target material flows, a movement path formed in a predetermined space of the chamber and through which the introduced target material is transported, and an upper portion of the target material movement passage. The DBD (Dielectric Barrier Discharge) plasma flexible electrode device 313, the nano-microbubble plasma device 301 formed at the bottom of the target material movement passage, and the cleaning solution provided from the chemical solution tank connected to one side of the chamber are moved. A spray nozzle 300 for spraying the target material on the passage, a poling 307 as a filler loaded on the target material movement passage, and the nano microbubble generated through the nano microbubble plasma device 301 are moved. It is provided with a nanobubble diffuser 308 that diffuses from the bottom to the top to increase the amount of contact with the target material in the passage.

At this time, a scrubber refers to a dust collection facility through cleaning, and is most widely applied as it can simultaneously treat odors, harmful gases, dust, and liquid pollutants. In addition, scrubbers are also called gas absorption towers, and are divided into dry, wet, and mixed types, but here, they refer to wet scrubbers. Wet scrubbers are a method of purifying pollutants by contacting harmful gases with liquid and washing them away. Purification efficiency In order to increase this, expensive chemicals that cause various chemical reactions, such as absorbent liquids such as sodium hydroxide and sulfuric acid, or cleaning liquids, are usually used together with water. This is to increase treatment efficiency by increasing the contact rate with harmful gases when water containing cleaning fluid is sprayed and purifying the water in which contaminants are dissolved.

In the present invention, the cleaning solution sprayed through the spray nozzle 300 is a cleaning solution that is harmless to the human body and can reduce the risk of accidents, and plasma ozone is generated within the chamber through the spray nozzle, which is It is reduced to OH-radicals and has an oxidizing power over 18,000 times that of ozone. In addition, by using each chemical tank separately, different chemical solutions can be used for each purpose, making it possible to use it in a wide range.

In addition, the filler poling 307 reacts with the poling as a pretreatment material when the chemical solution is sprayed onto the target material through the splay nozzle 300, thereby increasing the treatment effect. In addition, a first demister is formed on the spray nozzle 300 to remove moisture in the chamber. Here, dust collection efficiency, odor removal, SOx, and NOx reduction efficiency can be improved by using polling (filling material) and demister.

Additionally, various filters suitable for dust characteristics can be adopted. For example, filters such as spray nozzle, secondary polling, secondary demister, etc. can be used.

Additionally, a plurality of chambers are arranged in a horizontal or transverse direction, and the target material can pass along a movement path in one direction from left to right in the horizontal direction. One side of the movement passage of the target material may be connected to the inlet of the chamber, and a blower (Fan) may be installed on the other side. The blower (Fan) causes air flow and can move plasma (P), active radicals, ozone, etc. generated in the DBD plasma flexible electrode device 300 to the chamber.

In addition, the DBD plasma flexible electrode device 313 uses a mesh-shaped plasma electrode method to plasmaize air using low-temperature plasma and generate ozone to cause an oxidation reaction. Here, the DBD plasma flexible electrode device includes a first electrode and a second electrode having flexible characteristics and generates plasma (P), and the first electrode and the second electrode can form a lattice structure. For example, the first electrode extends along the y-axis direction and the second electrode extends along the x-axis direction from the bottom of the first electrode and intersects each other. At this time, the DBD plasma flexible electrode device 313 can increase the efficiency of odorous gas treatment by generating a large amount of ozone between the intersecting electrodes using a mesh-shaped plasma electrode method.

In addition, the DBD plasma flexible electrode device generates plasma discharge when power is applied to the first and second electrodes, can generate ozone using the generated energy, and can carry out an oxidation reaction using ozone and OH radicals in the plasma. to provide. Through this, the ozone generated from the DBD plasma flexible electrode device can move to the chamber and perform a purification action by removing microorganisms such as odors, bacteria, and mold contained in the target material.

In addition, the DBD plasma flexible electrode device includes a housing positioned to surround the outside of the first electrode and the second electrode, and the housing can accommodate and protect the first electrode and the second electrode therein. At this time, a power supply to which a power source, a ground wire, etc. can be connected may be installed in the housing, and the power supply may be connected to the first and second electrodes of the mesh-type plasma device to apply power. Additionally, when power is applied from the power supply unit, a discharge occurs at the contact portion where the first electrode and the second electrode come into contact with each other, thereby forming plasma (P). In this case, the plasma P can be stably discharged for a long time under atmospheric pressure.

In addition, a control panel that controls the DBD plasma flexible electrode device 313 and the nano microbubble plasma device 301 may be further provided, and the control panel has improved visibility by adopting a centralized built-in type and integrating a power switch, It has the advantage of having a low rate of damage or failure during movement. Additionally, the internal status can be checked through the display.

In this way, in the mesh-type plasma device, when power is applied to the first and second electrodes, plasma (P) is discharged and electrons are converted to nitrogen (N ₂ ) through dissociation, ionization, and excitation reactions. , oxygen (O ₂ ), moisture (H ₂ 0), etc. can be activated to generate active radicals and ozone. These active radicals and ozone not only decompose ammonia, hydrogen sulfide, methyl mecaptan, and sulfurous acid, but also remove harmful microorganisms such as bacteria and mold.

In particular, the mesh-type plasma device can effectively treat and remove nitrogen oxides (NOx) by decomposing/oxidizing NO and converting it into NO ₂ . In other words, treatment after NOx-plasma oxidation and destruction of odorous gases, harmful toxic substances, and VOCs are possible.

In addition, the mesh-type plasma device generates active O-H radicals to remove complex pollutants with various molecular sizes and characteristics, and can maximize treatment and reduction effects by using a carrier and the highest performance complex catalyst. Secondly, the target material is burned/oxidized/decomposed/removed through the DBD plasma/active photocatalyst system.

In other words, the DBD (Dielectric Barrier Discharge) plasma method allows plasma work at atmospheric pressure and room temperature. In addition, the DBD discharge method, which generates plasma in an atmospheric pressure environment, can effectively treat the material to be treated by generating a high-density (10 ~ 10 cm) oxygen active layer.

In addition, the DBD plasma/active photocatalyst system is composed of a multi-layer adsorption tower and can be individually separated with a filter plate, making it easy to replace.

First, the target material that is first treated through the mesh-type plasma scrubber has moisture absorbed through the second demister (306), and the activated carbon layer (305) and the zeolite layer (306) are used as an adsorbent with a high specific surface area. ) and is secondarily filtered.

In other words, activated carbon, zeolite adsorbent, and high adsorption capacity for organic molecules, as well as well-developed pores (micropores), enable efficient treatment with a very large effective surface area. For example, efficient treatment is possible by using adsorbents with a high specific surface area such as activated carbon and zeolite, and the replacement cycle can be extended by using high-quality activated carbon.

Next, in the UV lamp irradiation section layer 309, the target material that has been secondarily filtered while passing through the adsorbent layer is irradiated with ultraviolet rays within the UV lamp. In this way, ultraviolet irradiation can provide sterilization synergy by sterilizing and decomposing pollutants and interacting with photocatalysts.

Subsequently, the remaining target substances that are not removed in the oxidation reaction of the active photocatalyst/photocatalyst filter are guided to the DBD/low-temperature plasma device and the photocatalyst bead 303 located at the rear and are removed. At this time, the DBD plasma device radiates plasma reaction and UVA to the surface of the active photocatalyst/photocatalyst filter, which causes a photocatalytic reaction to generate active O-H radicals. The generated active O-H radicals have strong oxidizing power, and complex pollutants of various molecular sizes and characteristics are finally removed, and purified clean gas is provided through the outlet. At this time, photocatalyst beads are semiconductor materials that promote catalytic reactions to decompose bacteria and contaminants. In addition, fine dust is collected through the dust collector 311 at the bottom, and dust cleaning and frequent inspection are possible through opening and closing through the ball valve 311.

In the above description, the present invention has been shown and described in relation to specific embodiments, but it is common knowledge in the art that various modifications and changes are possible without departing from the spirit and scope of the invention indicated by the patent claims. Anyone who has it will be able to easily understand it.

100: First combustion furnace
101: M/W generator
102: Gliding arc flow meter
103: Flow meter box
104: Oil compressor
105: chiller
106: Gliding arc burner
107: 3 stub turner
108: Two-way coupler
109: Isolator
110: Quartz holder
111: cooling fan
112: indicator
113: power supply device
114: MCU
115: Honeycomb ceramic
116: Photocatalyst bead
117: Dust collector
118: Fire Proof
119: 3-module flange
121: Arc plasma electrode bar
122: Ignition unit
123: waveguide
200: Ceramic filter
300: Spray nozzle
301: Nano microbubble plasma device
302, 306: demister
303: Photocatalyst layer
304: Zeolite layer
305: activated carbon layer
307: Polling
308: Microbubble diffuser
309: UV lamp
310: ball valve
311: dust collector
312, 313: DBD plasma device

Claims (8)

An M/W plasma burner system that provides purified materials by performing primary combustion/oxidation/destruction/decomposition treatment on the introduced target materials using microwaves, and the target materials that are primarily processed in the MW plasma burner system A high-temperature plasma system including a gliding arc plasma burner system that performs secondary combustion/oxidation/destruction/decomposition treatment using gliding arc plasma;
A PM dust collection system that collects fine dust from the primary and secondary treated materials through the high-temperature plasma system:
Through the mesh-type plasma scrubber and the first low-temperature plasma system that generates plasma with the first DBD plasma device and uses the high concentration of ozone and OH radicals generated at this time to treat the target material in which fine dust is collected in the PM dust collection system. The primary treated target material is filtered through an adsorption tower composed of multiple adsorbent layers, and the plasma generated through the second DBD plasma device is irradiated to the surface of the photocatalyst layer formed at the top of the adsorption tower to generate active OH radicals. A three-stage plasma complex system including a low-temperature plasma system and a second low-temperature plasma system that secondaryly processes the target material through activated OH radicals. According to paragraph 1,
The M/W plasma burner system,
A waveguide that transmits M/W generated from the M/W generator;
a first combustion furnace located at an end of the waveguide and penetrated and connected to the waveguide;
an inflow passage through which the target material flows into the first combustion furnace, and an injection portion for the target material;
an ignition unit that ignites the M/W plasma provided in the first combustion furnace to generate a plasma torch;
A plasma three-stage complex system comprising a fuel injection unit that injects hydrocarbon-based fuel into the plasma torch generation area of the first combustion furnace. According to paragraph 1,
The gliding arc plasma burner system,
a second combustion furnace connected to the first combustion furnace of the primary M/W plasma burner system into which the target material subjected to primary combustion treatment flows;
High-voltage power is supplied to form an arc through discharge in the second combustion furnace, and the generated plasma is convected by reactants and pushed to the rear of the second combustion furnace, and primary combustion flows into the second combustion furnace from the electrode. A gliding arc burner unit that processes the treated target material through a secondary plasma oxidation reaction through the generated plasma flame. A three-stage plasma complex system including a gliding arc burner unit. According to paragraph 3,
The gliding arc burner unit,
A gliding arc electrode bar through which fuel is injected through an internal hollow,
An electrode bar holder connected to the gliding arc electrode bar and equipped with an external electrode into which discharge gas is injected,
A plasma three-stage complex system including an internal electrode connected to a distal end of the gliding arc electrode bar and located inside the second combustion furnace to generate a plasma flame. According to paragraph 1,
In the PM dust collection system _{, a SiC} coating layer is formed on the outer surface of the filter unit, and one of _MnO According to paragraph 1,
The first DBD plasma device is a flexible electrode device and is a three-stage plasma complex system using a mesh-shaped plasma electrode method. According to clause 6,
The first low-temperature plasma system,
A first DBD plasma device formed on the upper part of the target material movement passage,
A nano-microbubble plasma device that is formed at the bottom of the target material movement path and spreads the generated nano-microbubbles upward;
A plasma three-stage complex system including a spray nozzle that sprays the cleaning solution provided from the chemical tank onto the target material on the moving passage. According to paragraph 1,
The adsorption tower is,
A demister that absorbs moisture from the primary treated material,
An adsorbent layer formed on the top of the demister and sequentially formed as an adsorbent with a high specific surface area, including an activated carbon layer and a zeolite layer to filter the primary treated material;
A UV lamp irradiation layer that irradiates the filtered target material while passing through the adsorbent layer with ultraviolet rays within a UV lamp;
The target material remaining and not removed through the adsorbent layer and the irradiation layer is a three-stage plasma complex system including a DBD/low-temperature plasma device located at the rear and a photocatalyst layer that generates a photocatalytic reaction.