KR20230174369A - An apparatus for reducing atmosphere pollution matter emission using Rotating Gliding Arc - Google Patents

Abstract

The present invention includes a high-temperature plasma device for combustion/oxidation/destruction/decomposition of the introduced target material using gliding arc plasma; Plasma is generated using a first microbubble plasma device, and the target material processed through the high-temperature plasma device is converted into a water-soluble material using the high concentration of ozone and OH radicals generated at this time, and the converted water-soluble target material is placed in a second microbubble. It provides an air pollutant reduction device including a wet cleaning device that processes through a plasma device.

Description

An apparatus for reducing atmosphere pollution matter emission using Rotating Gliding Arc}

The present invention relates to an air pollutant reduction device, and more specifically, to remove greenhouse gases, nitrogen oxides, VOCs, etc. through three sequential steps: pretreatment for oil vapor components and odor removal, high-temperature plasma treatment using RGA, and low-temperature plasma treatment. This is about an air pollutant reduction device using RGA that can efficiently treat air pollutants.

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.

For example, in the dyeing complex, various dyeing industry production processes, such as nylon dyeing processing, synthetic fiber dyeing processing, printing, rayon, cotton, flocking, cotton fabric, T/C, curtain designation, polyester fabric printing, etc., various synthetic fibers. Air pollutants including VOCs are generated during the dyeing and printing processes.

Carcinogenic substances such as benzene, formaldehyde, vinyl chloride, and halogenated hydrocarbons are generated in these workplaces, and styrene acetaldehyde and other substances that cause odor and ozone are generated. In particular, VOCs (volatile organic compounds) are toxic chemicals and precursors of photochemical oxides, which are very dangerous toxic substances with a high carcinogenic potential even when present in trace amounts in the atmosphere.

Accordingly, the generation of air pollutants such as VOCs, aldehydes, and ammonia causes great inconvenience to residents in the target area due to the generation of complex odors in the residential environment. There is also the problem of providing an environment harmful to health through carcinogens, so various environmental problems exist. Civil complaints are increasing.

Currently, various types of air pollutant emission reduction systems such as selective catalytic reduction (SCR) are provided, but there are limitations in effectively removing greenhouse gases, nitrogen oxides, and VOCs.

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 involves three sequential steps: pretreatment to remove oil vapor components and odor, high-temperature plasma treatment using RGA, and low-temperature plasma treatment to remove air pollution such as greenhouse gases, nitrogen oxides, and VOCs. The purpose is to provide an air pollutant reduction device using RGA that can efficiently process materials.

For this purpose, the present invention includes a high-temperature plasma device for combustion/oxidation/destruction/decomposition of the introduced target material using gliding arc plasma; Plasma is generated using a first microbubble plasma device, and the target material processed through the high-temperature plasma device is converted into a water-soluble material using the high concentration of ozone and OH radicals generated at this time, and the converted water-soluble target material is placed in a second microbubble. It provides an air pollutant reduction device including a wet cleaning device that processes through a plasma device.

Additionally, the high-temperature plasma device includes a combustion furnace into which the target material flows; High-voltage power is supplied to form an arc through discharge in the combustion furnace, and the generated plasma is convected by reactants and is pushed to the rear end of the combustion furnace, and the target material flowing into the combustion furnace from the electrode is transformed into the generated plasma flame. It may include a gliding arc burner unit that processes plasma through an oxidation reaction.

In addition, the gliding arc burner unit includes a gliding arc electrode bar into which fuel is injected through an internal hollow, an electrode bar holder connected to the gliding arc electrode bar and provided with an external electrode into which discharge gas is injected, and the gliding arc electrode bar. It may include an internal electrode connected to the distal end of and located inside the combustion furnace to generate a plasma flame.

In addition, for the target material treated through the wet cleaning device, plasma generated through the first DBD plasma device is irradiated to the surface of the photocatalyst layer to generate active O-H radicals, and the generated active O-H radicals are used to treat the target material through 2. It may include a low-temperature plasma device for secondary treatment.

In addition, the wet cleaning device includes a second DBD plasma device in the form of a flexible electrode formed at the top of the target material movement passage, and a second DBD plasma device formed at the bottom of the target material movement passage to diffuse the generated nano-micro bubbles upward. It may include first and second microbubble plasma devices and a plurality of spray nozzles that spray the first cleaning solution provided from the chemical tank to the target material on the moving passage.

In addition, one or more filter units installed at the front of the high-temperature plasma device and removing oil vapor components from the target material in order to perform a pre-treatment step of the treatment process through the high-temperature plasma device, and oil vapor components through the filter unit. It may further include a pretreatment device including a cleaning unit that removes malodor components by spraying a second cleaning liquid on the removed target material.

The present invention is an air pollutant that can efficiently treat air pollutants such as greenhouse gases, nitrogen oxides, and VOCs through three sequential steps: pretreatment to remove oil vapor components and odor, high-temperature plasma treatment using RGA, and low-temperature plasma treatment. A reduction device can be provided.

At this time, the high-temperature plasma device performs combustion and oxidation reactions in the gliding arc plasma burner system to combustion-oxidize and decompose non-decomposable gas substances, hazardous toxic substances, odorous gases, VOCs, PAHs, and HAPs, and then disposes of clean (clean) substances through the outlet. It can provide eco-friendliness by discharging clean) substances.

In addition, after treating the target material with high-temperature plasma, a plasma + NO conversion system is implemented through the first plasma microbubble device to convert N ₂ O and NO ₂ into nitrogen oxide in the NO conversion system, and the second plasma microbubble device By removing the converted NO/N ₂ O/NO ₂ , it is possible to remove greenhouse gases such as nitrogen oxides from air pollutants that were difficult to remove with existing devices.

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 configuration of an air pollutant reduction device according to the present invention;
Figure 2 is a diagram showing the VOC pretreatment device in the air pollutant reduction device of Figure 1;
Figure 3 is a diagram showing the configuration of the high-temperature plasma processing device in the air pollutant reduction device of Figure 1;
FIG. 4 is a diagram showing the configuration of the gliding arc plasma generator in the high-temperature plasma processing device of FIG. 3;
FIG. 5 is a diagram showing the configuration of a heat recovery/heat regeneration RGA system in the high-temperature plasma processing device of FIG. 3;
Figure 6 is a diagram showing the configuration of the first plasma microbubble device in the air pollutant reduction device of Figure 1;
Figure 7 is a diagram showing the configuration of the second plasma microbubble device in the air pollutant reduction device of Figure 1;
FIG. 8A is a graph of NO, N ₂ O, NO ₂ nitrogen oxide conversion rates before operating the first plasma microbubble device, and FIG. 8B is a graph of NO, N ₂ O, NO ₂ nitrogen oxide conversion through operation of the first plasma microbubble device. oxide conversion rate graph,
Figures 9a and 9b are graphs showing (a) mg molar concentration and (b) SO2 total removal efficiency when using a basic cleaning solution for oyster shells, mussel shells, clam shells, and clam shells, respectively, and Figures 9c and 9d are (c) This is a graph showing the total SO2 removal efficiency, and (d) this is a graph showing the total NOx removal efficiency when using basic cleaning solutions for fired oyster shells, fired mussel shells, fired clam shells, and fired clam shells, respectively.
Figures 10a and 10b show baked oyster shells alone (100%), a mixed solution of baked oyster shells (90%) with additive NaCl (10%), and a mixed solution of baked oyster shells (70%) and additive NaCl (30%) as cleaning solutions, respectively. This is a graph showing (a) NOx total removal efficiency and (b) SO2 total removal efficiency when used.

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 device for reducing the emission of major pollutants such as greenhouse gases, nitrogen oxides, and VOCs, and is largely composed of a VOC pretreatment device, a high-temperature plasma device, first and second plasma microbubble devices, and DBD low-temperature plasma device. It can be.

Here, the air pollutant reduction device according to the present invention burns/oxidizes/destroys/decomposes air pollutants such as greenhouse gases, nitrogen oxides, and VOCs generated in industrial facilities such as factories and restaurants, and produces purified gas or substances. Provides an eco-friendly system that provides. Here, air pollutants such as greenhouse gases, nitrogen oxides, and VOCs generated from industrial facilities such as factories and restaurants are hereinafter referred to as “target substances.”

Figure 1 is a diagram showing the configuration of an air pollutant reduction device according to the present invention, Figure 2 is a diagram showing a VOC pretreatment device in the air pollutant reduction device of Figure 1, and Figure 3 is a view showing the high temperature in the air pollutant reduction device of Figure 1. A diagram showing the configuration of a plasma processing device. FIG. 4 is a diagram showing the configuration of a gliding arc plasma generator in the high-temperature plasma processing device of FIG. 3. FIG. 5 is a configuration of a heat recovery/heat regeneration RGA discharge system in the high-temperature plasma processing device of FIG. 3. , FIG. 6 is a view showing the configuration of the first plasma microbubble device in the air pollutant reduction device of FIG. 1, and FIG. 7 is a view showing the configuration of the second plasma microbubble device in the air pollutant reduction device of FIG. 1. It is a drawing.

Referring to FIG. 1, the air pollutant reduction device according to the present invention is largely purified through a VOC pretreatment device, a high-temperature plasma device, first and second plasma microbubble devices, and a DBD low-temperature plasma device. .

First, with reference to Figure 2, we will look at the VOC pretreatment device of the first stage.

Referring to FIG. 2, as a pretreatment step in the eco-friendly treatment process, target substances such as VOCs (volatile organic compounds) are subjected to a multi-stage filtering process and an odor deodorization process through spraying of a first cleaning solution. In particular, VOC among the target materials contains oil vapor components and has a high risk of explosion during the next high-temperature plasma treatment process, so it is necessary to remove the oil vapor components (flammable substances) in the pretreatment step.

Looking at this, the VOC pretreatment device may be composed of a filter chamber that performs a multi-stage filtering process on the upper part of the lower housing 113 and a cleaning chamber that sprays a cleaning solution.

In addition, a plurality of filter chambers and cleaning chambers are arranged horizontally or horizontally in the upper space of the lower housing 113, and can allow the target material to pass along the movement path in one direction from left to right in the horizontal direction. there is. The movement path of the target material is connected to the inlet 101 of the filter chamber on the left. Accordingly, when the target substance flows in through the inlet 101 of the lower housing 113, it moves upward to the filter chamber on the left, and ignitable oil vapor components can be filtered. At this time, a blower (Fan) installed on one side creates air flow and moves from the bottom to the top through the filter chamber on the left, then moves to the bottom again, and sprays the cleaning liquid from the bottom to the top through the cleaning chamber on the right to deodorize the bad odor. The VOC is pretreated through the outlet.

First, the target material is subjected to primary filtering to remove moisture in the filter chamber. The first filter unit that performs the primary filtering is configured to filter the target material condensed on the cooling coil when the flow rate of the target material's air passing through the cooling coil is high. It consists of an eliminator that scatters water droplets and passes them through, and a first demister that absorbs moisture from the target material on the moving path. Next, the target material that has been first filtered through the first filter unit is dried using cloth or fabric, and secondary filtering is performed to remove oil vapor components. Here, the second filter unit that performs secondary filtering includes a filter guide 104 that guides the primary filtered target material along the moving path, and a dryer that dries and removes the oil vapor component of the target material on the moving path formed through the filter guide. It consists of a pack 105 and a dry pack holder 105 that supports the dry pack on the filter chamber. Then, the target material that is secondarily filtered through the secondary filter unit is thirdly filtered while passing through the activated carbon layer 107 as an adsorbent with a high specific surface area.

In other words, the third filter unit that performs tertiary filtering uses an adsorbent with a high specific surface area such as activated carbon or zeolite to enable efficient treatment, and uses high-quality activated carbon to extend the replacement cycle. You can.

In this way, the first filter part, the second filter part, and the third filter part can be sealed through the filter box rubber seal 108, and each can be individually separated in the form of a filter box (filter plate), making it easy to replace. .

Then, as the target material flows through the blowing fan, the VOC complex odor can be removed by cleaning through the spray nozzle 109 in the right cleaning chamber.

At this time, the second demister 111, which secondarily removes moisture from the target material before spraying the cleaning liquid, filters the target material from which the secondary moisture is removed through polling 110 as a filler loaded on the moving passage, and cleansing liquid at the top. VOC complex odor is removed by spraying the cleaning liquid through the spray nozzle 109 in the spray section. In addition, a chemical tank (not shown) that stores the cleaning liquid in the lower housing 113 for spraying the cleaning liquid, and a transfer pipe (not shown) that supplies the cleaning liquid stored in the chemical tank to the spray bottle 109 in the cleaning liquid injection section. A cleaning liquid injection device such as a chemical liquid pump (not shown) that flows the cleaning liquid may be further provided.

Additionally, the cleaning solution may contain additives of plant essential oils to remove bad odors from the target material. Table 1 shows an example of the volume ratio composition of a cleaning solution to which deodorant (vegetable oil) was added.

substance name Content (volume %) note Sodium hypochlorite (1%) 75.00% sodium chloride 0.04% Alkylbenzenesulfonic acid 0.04% Sodium lauryl ether sulfate 0.05% sodium hydroxide 0.01% polydimethylsiloxane 0.01% Hydrodiethylcellulose 0.01% glycerides 0.01% Turpentine-free lime oil 0.20% Turpan-free orange oil 0.20% ethanol 0.09% vegetable oil 0.09% Purified water 24.25% Sum 100%

In Table 1, vegetable oil has a volume ratio of 0.09% in the total cleaning solution, and lime oil and orange oil each have a volume ratio of 0.20%.

At this time, the plant essential oil (or vegetable oil) may be composed of one or more of lavender, cinnamon, jasmine, basil, mandarin, rosewood, chamomile, citron, vetiver, peppermint, cypress, lemon, lime, etc., or a combination thereof. there is. In addition, the plant essential oil material may be comprised in an amount of 0.10 or more to 2.00 or less by volume in the total cleaning mixed solution.

Through this, plant essential oils can remove complex odors from air pollutants such as VOCs by acting as a catalyst in the oxidation and decomposition of odorous substances.

In addition, one or more dust collectors at the bottom collect fine dust during the VOC pretreatment process of filtering and cleaning, and dust cleaning and frequent inspection are possible through opening and closing through the ball valve 115.

In addition, the VOC preprocessing device can be moved through moving wheels through the caster 114 device, allowing for advantageous space utilization.

Below, with reference to FIG. 3, we will look at the RGA (Rotating Gliding Arc) discharge system as a second stage high temperature plasma device. FIG. 3 is a diagram showing the configuration of an RGA discharge system according to the present invention, FIG. 4 is a diagram showing the configuration of a microwave plasma generator in the RGA discharge system of FIG. 3, and FIG. 5 is a diagram showing a gliding arc plasma generation in the RGA discharge system of FIG. 3. This is a diagram showing the composition of the department.

Referring to Figure 3, the RGO discharge system according to the present invention is a gliding arc that burns/oxidizes/destructs/decomposes the pretreated target material using gliding arc plasma in a combustion furnace and provides purified gas or material through the outlet. It may be configured as a plasma burner system. 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.

Referring to FIGS. 3 to 5, the high-temperature plasma device includes a combustion furnace 216, a target material injection unit 201 as an inlet passage through which the target material flows into the combustion furnace 216, and the combustion furnace 216. ) and a gliding arc plasma burner 212 that generates an arc flame within the combustion furnace 216, and a fuel injection unit 222 that injects hydrocarbon-based fuel into the plasma generation area within the combustion furnace 216.

In addition, the combustion furnace 216 may be a cylindrical reactor made of a material such as quartz or glass. Here, the cylindrical reactor made of quartz is supported by first and second supports 207 and 208 on both sides. .

In addition, it is coupled to the fuel injection unit 222 and is configured to inject fuel gas made of hydrocarbon (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.

In other words, the 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 includes a combustion furnace (216, 228) into which target materials pretreated through a VOC pretreatment device are introduced, and high-voltage power that is supplied to the combustion furnace (216, 228) through discharge. The plasma generated by forming an arc is convected by the reactants and is pushed to the rear end of the combustion furnace (216, 228), and the pretreated target material introduced from the electrode into the combustion furnace (216, 228) is burned through the generated plasma flame. It is provided with a gliding arc burner unit 212 that performs plasma treatment through an oxidation reaction.

The combustion furnaces 216 and 228 are arc reactors in which gliding arc discharge occurs, and have a high operating temperature of 900 to 1,600° C., and a cylindrical reactor made of a material such as quartz or glass may be used. In addition, the combustion furnaces 216 and 228 have external housings made of insulating material to prevent heat radiation to the outside, and a refractory material or fire prevention device (not shown) is installed at the bottom of the arc reactor to prevent fires caused by arc or plasma flames. ) is provided, and a dust collector 215 and a cooling device 217 that collect dust resulting from combustion or oxidation reactions may be further provided.

At this time, high-voltage AC power may be applied to the power source, and the LPG flow meter 205, which measures the amount of hydrocarbon fuel injected into the combustion furnaces 216 and 218 through the gliding arc flow meter 203, and the target material An air flow meter 204 may be provided to measure flow rate such as mass or volume as the inflow amount.

In addition, a gliding arc burner control unit 206 may be further provided to control the M/W power provided to the combustion furnaces 216 and 228 by controlling the gliding arc burner unit. At this time, the power supply device can apply high voltage alternating current power.

Referring to FIG. 4A, the gliding arc (G.A.) burner unit includes a gliding arc electrode bar 222 into which fuel is injected through an internal hollow, and a first electrode bar holder 221 that supports the gliding arc electrode bar 222. and a second electrode bar holder 233 connected to the first electrode bar holder 221 and equipped with an external electrode and into which discharge gas is injected, and a gliding arc supporting the second electrode bar holder 233. A body, an internal electrode 234 connected to the distal end of the gliding arc electrode bar and located inside the second combustion furnace to generate a plasma flame 235, and an arc 236 that covers the internal electrode 234 and ) is provided with a third electrode bar holder that generates. At this time, when the gliding arc burner unit is a small device and is configured in plural, the heat treatment effect can be increased. In the present invention, a 3-module electrode bar can form a total of 6 gliding arc burner units, one on each side 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. At this time, referring to FIG. 4b, hydrocarbon-based fuel (fue) provided to the second combustion furnace 228 through the fuel flow meters 205 and 203b and the air flow meters 204 and 203a of the gliding arc flow meter 203, respectively. As the inflow amount of the target material (air), the flow rate such as mass or volume can be measured, and the measured flow rate can be controlled through each fuel valve actuator 225b and the air valve actuator 225a. The arc plasma generated in the SBMS (Smart Burner mgmt System) 226 configured through this creates an environment for high temperature and oxygen active species generation, and can increase combustion efficiency through plasma chemical reaction with the injected fuel (LPG). This can bring out the maximum effect of potential calories.

Referring to Figures 4b and 4c, in the gliding arc burner system, VOCs are decomposed into CO ₂ and H ₂ O through a high-temperature oxidation reaction, and the reaction heat can be recycled through the thermal oxidation heat exchanger 227, thereby reducing volatile organic compounds ( It can be confirmed that it is effective in removing VOCs).

Referring to FIG. 5, reaction heat can be recycled through heat recovery/heat regeneration through the thermal oxidation heat exchanger 227. That is, the reactor 228 can be divided into an upper and lower primary combustion chamber and an upper secondary combustion chamber, and the lower primary combustion chamber and the upper secondary combustion chamber are connected through a combustion gas guide pipe.

In addition, the thermal oxidation heat exchanger 227 recycles reaction heat through heat recovery and heat regeneration through a ceramic catalyst layer with good heat resistance at the top of the secondary combustion chamber and a waste heat recovery device formed on the ceramic catalyst layer.

Subsequently, after oxidation combustion reaction treatment by high temperature combustion reaction, it is discharged to the gas outlet 208 through the gas transfer unit. At this time, during the discharge process, the remaining unreacted odor gases, non-decomposable substances, VOCs, and HAPs can be additionally removed by passing through the photocatalyst beads and honeycomb-type hybrid composite catalyst system.

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 high-temperature plasma in the combustion furnace (discharge tube) of 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.

Referring to FIG. 3, after oxidation combustion reaction treatment by high temperature combustion reaction through the RGA discharge system according to the present invention, the remaining target materials are post-treated by passing them through photocatalyst beads and a honeycomb type hybrid composite catalyst system, The target material is transferred to the first plasma microbubble device through the gas transfer unit.

FIG. 6 is a diagram showing the configuration of the first plasma microbubble device in the air pollutant reduction device of FIG. 1, and FIG. 7 is a diagram showing the configuration of the second plasma microbubble device in the air pollutant reduction device of FIG. 1.

Referring to Figures 6 and 7, in the air pollutant reduction device according to the present invention, low-temperature plasma treatment is performed after high-temperature plasma treatment of the target material. In this low-temperature plasma device, a plasma + NO conversion system is implemented through a first plasma microbubble device, N ₂ O and NO ₂ are converted into nitrogen oxides in the NO conversion system, and the converted through the second plasma microbubble device is converted into nitrogen oxide. By performing NO/N ₂ O/NO ₂ removal, nitrogen oxides, which were difficult to remove with existing devices, can be removed from air pollutants.

Referring to FIG. 6, the first plasma microbubble device is a plasma + NO conversion system, and the NO conversion system converts N ₂ O and NO ₂ into nitrogen oxide. For example, it is removed by combustion/oxidation/destruction/decomposition through primary and secondary combustion oxidation reactions using a high-temperature plasma device.

However, especially in the case of nitrogen oxides (NOx), after being decomposed/oxidized into NO, there are limitations in the existing selective catalytic reduction (SCR) process, so it is converted into water-soluble N ₂ O and NO ₂ nitrogen oxides through a plasma + NO conversion system. Let's do it. Then, the NO/N ₂ O/NO ₂ converted through the second plasma microbubble device can be completely removed through wet cleaning.

Through this, the first plasma microbubble device may be configured as a cleaning chamber that sprays a plurality of cleaning liquids on the upper part of the second lower housing. For example, a plurality of cleaning chambers are arranged horizontally or horizontally in the upper space of the lower housing, and the plurality of cleaning chambers are connected through a bridge 307 to clean the target material in one direction from left to right in the horizontal direction. can pass along the movement path. The movement path of the target material is connected to the inlet 301 of the cleaning chamber on the left. Accordingly, when the target material flows in through the inlet 301, it moves upward to the cleaning chamber on the left, and before spraying the cleaning liquid, the target material is filtered through the polling 302 and net structure as a filler loaded on the moving passage. Air pollutants are filtered through the saddle layer 303, which increases the residence time, and the air pollutants are treated by spraying the cleaning fluid through the first spray nozzle 315 in the first cleaning fluid injection section 304 at the top. At this time, the blower (Fan) installed on one side creates air flow and moves from the bottom to the top through the cleaning chamber on the left, then moves to the cleaning chamber on the right through the connected bridge 307, and sprays the cleaning solution from the top. Afterwards, it is subjected to primary plasma microbubble treatment through the lower outlet 312. At this time, filtering of the saddle layer 313 and the polling layer may be added as post-processing. In addition, the filler polling layer reacts with polling as a pretreatment material when the chemical solution is sprayed onto the target material through the splay nozzle 315, thereby increasing the treatment effect. In addition, first and second demister 306 are formed on the spray nozzle 315 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. In addition, a viewport 305 formed on the side of the cleaning chamber to check the cleaning liquid injection and processing process and a process control unit 316 for process control may be further provided.

At this time. As the target material flows through the blowing fan, cleaning is performed through the first and second spray nozzles 315 from the left cleaning chamber to the right cleaning chamber.

In particular, in the present invention, the cleaning chamber has the form of a wet plasma scrubber, and includes a microbubble plasma device 310 formed at the bottom of the target material movement passage on the left and right cleaning chambers, and a microbubble plasma device 310 through the microbubble plasma device 310. It includes a nanobubble diffuser that diffuses the generated nano-microbubbles from the bottom to the top to increase the amount of contact with the target material on the movement path.

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 addition, a transfer pipe 308 and a transfer pipe 308 for supplying the cleaning liquid stored in the chemical tank 311 to the chemical tank 311 that stores the cleaning liquid in the lower housing for spraying the cleaning liquid and the spray nozzle 315 in the cleaning liquid injection section. ) may be further provided with a cleaning liquid injection device such as a chemical liquid pump 309 that flows the cleaning liquid.

In the present invention, plasma ozone is generated in the cleaning liquid spray layer 306 through the first microbubble plasma device, which is reduced to OH-radicals and has an oxidizing power more than 18,000 times that of ozone.

That is, NO among nitrogen oxides (NOx) is decomposed/oxidized and converted into N ₂ O and NO ₂ nitrogen oxides through the first microbubble plasma device. Figure 8a shows a graph of NO, N ₂ O, and NO ₂ nitrogen oxide conversion rates before operating the microbubble plasma device, and Figure 8b shows a graph of NO, N ₂ O, and NO ₂ nitrogen oxide conversion rates through operation of the microbubble plasma device. It represents. Referring to FIG. 8b, NO among nitrogen oxides (NOx) can be decomposed/oxidized and the conversion into N ₂ O and NO ₂ nitrogen oxides can be improved through a microbubble plasma device.

In addition, the cleaning solution sprayed through the spray nozzle 315 in the plasma + NO conversion system through the first microbubble device is a cleaning solution harmless to the human body, which can reduce the risk of accidents, and can reduce the risk of accidents through the spray nozzle to the chamber ( Plasma ozone is generated within the chamber, which is reduced to OH-radicals and has an oxidizing power more than 18,000 times that of ozone.

The basic cleaning solution used at this time is Ca(OH) _2, CaO, CaCO ₃ , CaSO ₄ , Na ₂ CO ₃ , NaHCO ₃ , NaOH, Na ₂ SO ₃ , MgO, Mg(OH) ₂ , KOH, oyster shell, mussel shell. , clam shell, clam shell, or a combination of one or more of these may be used. Additionally, the additive may be any one of NaCl, CaCl ₂ , CuO, and NaClO ₂ or a combination of one or more of these. Additionally, preferably, the mixing ratio of the basic cleaning solution and the additive can be optimized to a volume ratio of 9:1.

Table 2 shows the type and processing efficiency of the cleaning solution used in the first microbubble device.

process Cleaning liquid type Reaction temperature (℃) Removal efficiency (%) apply



Cleansing liquid ingredients CaCO ₃ , Ca(OH) _{2 ,} CaO 30~70 90~99 possible MgO, Mg(OH) ₂ 30~70 90~95 possible MgO, CaCO ₃ 30~70 95~97 possible CaCO ₃ , CaSO ₄ 30~70 96~98 possible NaOH, NaHCO ₃ 30~70 90~99 possible Na ₂ SO ₃ 30~70 90~99 possible Na ₂ SO ₃ , Na ₂ CO ₃ 30~70 95~99 possible

Figures 9a and 9b are graphs showing (a) mg molar concentration and (b) SO2 total removal efficiency when using a basic cleaning solution for oyster shells, mussel shells, clam shells, and clam shells, respectively, and Figures 9c and 9d are (c) This is a graph showing the total SO2 removal efficiency, and (d) this is a graph showing the total NOx removal efficiency when using basic cleaning solutions for fired oyster shells, fired mussel shells, fired clam shells, and fired clam shells, respectively.

Figures 10a and 10b show baked oyster shells alone (100%), a mixed solution of baked oyster shells (90%) with additive NaCl (10%), and a mixed solution of baked oyster shells (70%) and additive NaCl (30%) as cleaning solutions, respectively. This is a graph showing (a) NOx total removal efficiency and (b) SO2 total removal efficiency when used.

In addition, a DBD (Dielectric Barrier Discharge) plasma flexible electrode device formed on the upper part of the target material movement passage may be further provided. At this time, 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 DBD plasma flexible electrode device 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 316 that controls the DBD plasma flexible electrode device and the nano-microbubble plasma 310 may be further provided, and the control panel has improved visibility by adopting a centralized built-in type and integrating a power switch, and can be used while moving. It has the advantage of low damage or failure rate. 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.

As described above, a plasma + NO conversion system is implemented through the first plasma microbubble device to convert water-soluble N ₂ O and NO ₂ into nitrogen oxides.

Accordingly, referring to FIG. 7, the converted NO/N ₂ O/NO ₂ can be completely removed through wet cleaning using the second plasma microbubble device.

Through this, the second plasma microbubble device may be configured as a cleaning chamber that sprays a plurality of cleaning liquids on the upper part of the third lower housing. For example, three cleaning chambers are arranged horizontally or horizontally in the upper space of the lower housing, and the plurality of cleaning chambers are connected through a bridge to move the target material in one direction from left to right in the horizontal direction. It can be passed along the passage. The movement path of the target material is connected to the inlet 401 of the cleaning chamber on the left. Accordingly, when the target material flows in through the inlet 401, it moves upward to the cleaning chamber on the left, filters the target material through the polling 403 as a filler loaded on the moving passage before spraying the cleaning liquid, and filters the target material through the polling 403. Air pollutants are treated by spraying the cleaning solution through the first to third spray nozzles 404 in the through third cleaning fluid injection sections. At this time, the blower (Fan) installed on one side creates air flow and moves from the bottom to the top through the cleaning chamber on the left, then moves to the cleaning chamber on the right through the connected bridge, and is treated by spraying the cleaning solution at the top, and then flows through the upper outlet ( 408) is subjected to secondary plasma microbubble treatment. At this time, filtering of the saddle layer and polling layer may be added before or after the injection liquid process. In addition, the filler polling layer reacts with polling as a pretreatment material when the chemical solution is sprayed onto the target material through the splay nozzle 404, thereby increasing the treatment effect. In addition, first to third demisters 406 are formed on the spray nozzle 404 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. In addition, a viewport formed on the side of the cleaning chamber to check the cleaning liquid injection and processing process and a process control unit 409 for process control may be further provided.

At this time. As the target material flows through the blowing fan, cleaning is performed from the left chamber to the right cleaning chamber through the first to third spray nozzles 404 in the first to third chambers.

In particular, the second microbubble plasma device also has the form of a wet plasma scrubber and includes a second microbubble plasma device 406 formed at the bottom of the target material movement passage on the first to third chambers as left and right cleaning chambers, respectively; , It includes a nanobubble diffuser that diffuses the nanomicrobubbles generated through the second microbubble plasma device 406 from the bottom to the top to increase the amount of contact with the target material on the movement path.

In addition, a chemical tank (not shown) that stores the cleaning liquid in the lower housing for spraying the cleaning liquid, a transfer pipe (not shown) that supplies the cleaning liquid stored in the chemical tank to the spray nozzle 404 in the cleaning liquid spray section, and the cleaning liquid is supplied from the transfer pipe. A cleaning liquid injection device such as a chemical liquid pump 402 that flows may be further provided.

In the present invention, plasma ozone is generated in the cleaning liquid spray nozzle 404 through the second microbubble plasma device, which is reduced to OH-radicals and has an oxidizing power more than 18,000 times that of ozone.

Accordingly, after being converted into water-soluble N ₂ O and NO ₂ nitrogen oxides through the first microbubble plasma device, the converted NO/N ₂ O/NO ₂ is sprayed through a spray nozzle ( It can be completely removed by spraying a cleaning solution through 404).

The cleaning solution used at this time may be an absorbent of alkanolamines to enable removal of greenhouse gases such as CO ₂ , HFC, and CFC by chemical absorption.

For example, AMP (2-Amino-2-Methyl-1-Propanol)/MEA (Monothanolamine) aqueous solution can be effectively used as a cleaning solution due to its high reactivity, low solvent price, ease of regeneration, and low absorption of hydrocarbons.

In addition, an aqueous solution containing MDEA (N-Methyldiethanolamine) + a small amount of Piperazine improves the reaction rate and absorption capacity of the absorbent, and the addition of Piperazine suppresses the deterioration of MDEA and corrosion of carbon steel.

Additionally, CO ₂ reactivity can be improved when Piperazine, an activator, is added to AMP.

In addition, when AMP+HDMA is added, the absorption capacity is about twice as good as that of MEA and the absorption capacity is increased compared to the mixed absorbent with Piperazine added to AMP, so HDMA can further improve the absorption capacity of AMP compared to other absorbents.

In addition, like the first microbubble plasma device, the second microbubble plasma device may further include a DBD (Dielectric Barrier Discharge) plasma flexible electrode device formed on the upper part of the target material movement passage. At this time, 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 this way, after wet cleaning through the first and second microbubble plasma devices, the target material is secondarily subjected to combustion/oxidation/decomposition/removal processing through the DBD plasma/active photocatalyst system 510.

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 510 can be configured as a multi-layer adsorption tower, and can be individually separated using a filter plate, which has the advantage of being easy to replace.

First, the target material that has been primarily treated through the first and second microbubble plasma scrubbers has moisture absorbed through the demister 501, and the activated carbon layer 502 and zeolite as an adsorbent with a high specific surface area. As it passes through layer 503, it undergoes secondary filtering.

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 504, 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 510 and the photocatalyst bead 505 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 a dust collector 521 at the bottom, and dust cleaning and frequent inspection are possible through opening and closing through a ball valve 520.

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.

200: High temperature plasma device
201: inlet
202: High temperature plasma chamber
203: Flow meter box
204: Air flow meter
205: Gliding arc flow meter
206: control unit
207, 213: Gliding arc support
208: outlet
209: Circulating layer
210: Upper part of combustion furnace
211: 3-module flange
212: Plasma burner
214: Lower part of combustion furnace
215: Dust collection box
216: Combustion furnace
217: Cooling device
222: Arc plasma electrode bar
223: Ignition unit
224: waveguide
300: Spray nozzle
301: Nano microbubble plasma device
501: demister
502: activated carbon layer
503: Zeolite layer
504: UV lamp
505: Photocatalyst layer
510: DBD plasma device
520: ball valve
521: Dust collector

Claims (6)

A high-temperature plasma device that burns/oxidizes/destructs/decomposes the introduced target material using gliding arc plasma;
Plasma is generated using a first microbubble plasma device, and the target material processed through the high-temperature plasma device is converted into a water-soluble material using the high concentration of ozone and OH radicals generated at this time, and the converted water-soluble target material is placed in a second microbubble. An air pollutant reduction device including a wet cleaning device that processes through a plasma device. According to paragraph 1,
The high temperature plasma device,
A combustion furnace into which the target material flows;
High-voltage power is supplied to form an arc through discharge in the combustion furnace, and the generated plasma is convected by reactants and is pushed to the rear end of the combustion furnace, and the target material flowing into the combustion furnace from the electrode is transformed into the generated plasma flame. An air pollutant reduction device including a gliding arc burner unit that processes plasma through an oxidation reaction. According to paragraph 2,
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,
An air pollutant reduction device comprising an internal electrode connected to a distal end of the gliding arc electrode bar and located inside the combustion furnace to generate a plasma flame. According to paragraph 1,
For the target material treated through the wet cleaning device, plasma generated through the first DBD plasma device is irradiated to the surface of the photocatalyst layer to generate active OH radicals, and the generated active OH radicals are used to secondaryly treat the target material. An air pollutant reduction device including a low-temperature plasma device. According to paragraph 1,
The wet cleaning device,
A second DBD plasma device in the form of a flexible electrode formed on an upper part of the target material movement path,
First and second microbubble plasma devices that are formed at the bottom of the target material movement path and diffuse the generated nano-microbubbles upward;
An air pollutant reduction device comprising a plurality of spray nozzles for spraying a first cleaning solution provided from a chemical solution tank onto a target object on the movement path. According to paragraph 1,
Installed at the front of the high-temperature plasma device,
In order to perform the pretreatment step of the treatment process using the high temperature plasma device,
It further comprises a pretreatment device including at least one filter unit for removing oil vapor components from the target material, and a cleaning unit for removing malodor components by spraying a second cleaning liquid on the target material from which the oil vapor component has been removed through the filter unit. Air pollutant reduction device.