KR102540661B1 - Cyclone Plasma Thermal Oxidation System for Malodorous Gas Treatment - Google Patents

Abstract

The present invention, using a microwave (M / W) M / W plasma combustion apparatus for burning the target material introduced into the first chamber through the inlet to provide a primary treated target material; a gliding arc plasma oxidizing device for providing a target material subjected to secondary processing by performing a plasma combustion and oxidizing reaction of the target material firstly treated in the M/W plasma combustion device using gliding arc plasma in a second chamber; A hybrid composite catalyst system that catalyzes the secondly treated target material through the gliding arc plasma oxidizer with a honeycomb structured multi-stage or multi-layered catalyst layer to provide an outlet for the finally treated target material; It is possible to provide a cyclone plasma combustion oxidation system for

Description

Cyclone Plasma Thermal Oxidation System for Malodorous Gas Treatment}

The present invention relates to an odor removal device, and more particularly, to a cyclone plasma combustion and oxidation system that effectively treats odor gases, harmful toxic substances, and VOCs.

In the era of rapid climate change along with the recent serious global warming problem, recalcitrant gases (VOC _S , PFC _S , NF ₃ , SF ₆ ), industrial waste gas, odorous gas, and harmful toxic substances, which have adverse effects, are causing various environmental problems. It is causing serious problems for human survival. With the development of the climate industry, environmental pollution problems are becoming increasingly serious, and regulations on harmful pollutants are being further strengthened. In _particular , waste _gas generated in the industrial sector has _various sources _and is evaluated as a major cause _of air pollution such as air warming _. S) is included. Even in Korea, environmental civil complaints about odorous gases are continuously being raised, and among harmful air pollutants, Volatile Organic Compounds (VOCs), Polychlorinated Biphenyls, and Hazardous Air Pollutants (HAPs) are likely to be carcinogenic, form tropospheric ozone, and form photochemical smog. It is a hazardous chemical substance that has adverse effects on the human body and the domestic atmospheric environment in many aspects because it causes explosiveness, etc.

In the past, a method of reacting non-degradable waste gas in industrial waste gas to harmless treatment was used, but there is a limitation in large-capacity treatment and there is a problem in that odor gas, VOC _S, PAHs, and HAPs in waste gas cannot be effectively removed. Odor gas and VOCs emissions are continuously increasing in urban areas, but the technology for combustion and oxidation systems to effectively treat and solve odor gases, harmful toxic substances, VOCs _, PAHs, and HAPs is limited.

In order to remove these odor gases, VOCs, PAHs, and HAPs, activated carbon adsorption removal method, detergent absorption method, flame oxidation combustion method, catalytic oxidation method, chemical oxidation method using ozone, decomposition method using low-temperature plasma, and bio-filtration Technologies using the method are being developed, but there is a limit to effectively removing harmful toxic substances, VOCs, and recalcitrant odor gases.

The present invention is to solve the conventional problems, and provides a cyclone plasma combustion and oxidation system for removing odor gases that can efficiently remove odor gases, VOCs, and harmful toxic substances generated at industrial sites and treat them efficiently. aims to do

In order to solve the above problems, the cyclone plasma combustion and oxidation system for removing odorous gases according to the present invention burns the target material introduced into the first chamber through the inlet using a microwave (M/W) to perform primary treatment. a M/W plasma combustion device providing a target material; a gliding arc plasma oxidizing device for providing a target material subjected to secondary processing by performing a plasma combustion and oxidizing reaction of the target material firstly treated in the M/W plasma combustion device using gliding arc plasma in a second chamber; A hybrid composite catalyst system that catalyzes the secondly treated target material through the gliding arc plasma oxidizer into a multi-stage or multi-layered catalyst layer of a honeycomb structure and provides an outlet for the finally treated target material.
In addition, the M / W plasma combustion device includes an M / W plasma supply unit for generating M / W plasma, and the M / W plasma supplied through the M / W plasma supply unit and the target material introduced through the inlet and combustion A discharge tube for reacting may be included.
In addition, the M/W plasma supply unit connects a high-frequency oscillator that receives driving power supplied from the outside and oscillates M/W, and connects the high-frequency oscillator and the first chamber so that the M/W generated by the high-frequency oscillator is A waveguide as a moving passage, an isolator that protects the high frequency oscillator by outputting M/W oscillated by the high frequency oscillator and at the same time extinguishing M/W energy reflected by impedance mismatch, and disposed at a rear end of the isolator, A coupler that couples the M/W generated by the high-frequency oscillator, and impedance matching is induced by controlling the intensity of the incident wave and the reflected wave of the M/W output from the coupler, so that the electric field induced by the M/W is in the first chamber. You can include a three-stove tuner to make it max.

In addition, in the cyclone plasma combustion and oxidation system for removing odorous gases and harmful toxic substances according to the present invention, the operating temperature of the microwave plasma combustion device 120 is 900 to 1,600 ° C, and the gliding arc plasma oxidation device 130 operates The temperature is preferably 900 to 1,600°C.
In addition, while the hybrid composite catalyst system is stacked from the bottom to the top,
A ceramic heat storage material of a lower layer, a diatomaceous earth/SiO ₂ ceramic filter layer formed on the ceramic heat storage material, a TiO ₂ active catalyst layer formed on the diatomaceous earth/SiO ₂ ceramic filter layer, and KMnO4 formed on the TiO ₂ active catalyst layer /ZnO catalyst layer, a V ₂ O ₅ catalyst layer formed on the KMnO4/ZnO catalyst layer, and a zeolite adsorption layer formed on the V ₂ O ₅ catalyst layer.

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According to the cyclone plasma combustion and oxidation system for removing odorous gases and harmful toxic substances according to the present invention, the microwave plasma combustion device 120 and the gliding arc plasma oxidation device 130 at the front end remove harmful toxic substances and recalcitrant substances, By burning and oxidizing VOCs, PAHs, and HAPs, odorous gases and harmful toxic substances can be efficiently treated and removed.

1 is a schematic diagram of a Cyclone Plasma Combustion Oxidation System (Cyclone PTO) for removing odorous gases and harmful toxic substances according to a preferred embodiment of the present invention.

Hereinafter, embodiments in which a person skilled in the art can easily practice the present invention will be described in detail with reference to the accompanying drawings. However, in the detailed description of the operating principle of the preferred embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

In this application, terms such as “comprise” or “have” are intended to designate that there are features, numbers, components, parts, or combinations thereof described in the specification, but one or more other features, numbers, operations, It should be understood that it does not preclude the possibility of the presence or addition of components, parts, or combinations thereof.

In addition, including a certain component does not exclude other components unless otherwise stated, but means that other components may be further included.

In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, it should not be interpreted in an ideal or excessively formal meaning. don't

1 is a schematic diagram showing a cyclone plasma combustion and oxidation system 100 for removing malodorous gases and harmful toxic substances according to a preferred embodiment of the present invention.

Referring to FIG. 1, the cyclone plasma combustion and oxidation system according to the present invention largely uses microwaves to introduce odorous gases and harmful toxic substances into the first chamber 121 through the inlet 102 (hereinafter, A M/W (microwave) plasma combustion device 120 that burns the target material and provides a primary treated target material by burning the target material; A gliding arc that provides a secondly purified target material through the outlet 103 by subjecting the target material firstly treated in the M/W plasma combustion device to a combustion oxidation reaction using gliding arc plasma in the second chamber 137 a plasma oxidizer 130; The target material subjected to secondary treatment through the gliding arc plasma oxidizer 130 is finally passed through a honeycomb hybrid composite catalyst system 180 composed of multi-stage or multi-layered adsorbent layers or filters to remain and a honeycomb-type hybrid composite catalyst system 180 providing an outlet 103 by additionally removing unreacted substances.
Herein, microwave is abbreviated hereinafter and referred to as "M/W", and the target materials include recalcitrant gases (VOC _S , PFC _S , NF ₃ , SF ₆ ) generated at industrial plant sites, etc. as well as odor It may contain odorous gases and harmful toxic substances such as triggering substances (NH ₃ , H ₂ S), Volatile Organic Compounds (VOCs), Polychlorinated Biphenyls, and Hazardous Air Pollutants (HAPs).
In addition, the M/W plasma burning device 120 and the gliding arc plasma oxidizing device 130 are connected through a continuous plasma reactor 141.

Through this, in the present invention, the target material generated at the industrial plant site is firstly burned through the M / W plasma combustion device 120, and secondarily, the plasma combustion and oxidation reaction is performed through the gliding arc plasma device 130 Thirdly, through the honeycomb-type hybrid composite catalyst system 180, a multi-stage structure or a multi-layer structure filter is catalyzed, and the target material purified through the outlet 103 (odors purified by first, second, and third consecutive processing) gases and toxic substances).

First, the target material introduced into the first chamber 121 primarily through the inlet 102 is treated through an M/W plasma combustion reaction.

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The M/W plasma combustion device 120, which provides a M/W plasma combustion reaction for the target material introduced into the reaction space, includes an M/W plasma supply unit 170 that generates M/W plasma, The M/W plasma supplied through the M/W plasma supply unit 170 may be provided with a discharge tube 101 that burns and reacts with the target material introduced through the inlet 102.
Here, the M/W plasma supply unit 170 connects a high-frequency oscillator 171 that oscillates microwaves by receiving driving power supplied from the outside, and connects the high-frequency oscillator 171 and the first chamber 121 to the A waveguide 175 is provided as a passage through which microwaves generated by the high frequency oscillator 171 move. In addition, an isolator 172 that protects the high-frequency oscillator by outputting microwaves oscillated by the high-frequency oscillator 171 and simultaneously extinguishing microwave energy reflected by impedance mismatch, and the isolator 172 The coupler 173 disposed at the rear and separating or combining the microwave generated by the high-frequency oscillator 171, and adjusting the intensity of the incident wave and the reflected wave of the microwave output from the coupler 173 to induce impedance matching A three-stub tuner 174 is provided so that the electric field induced by the microwave is maximized in the first chamber 121 .

In addition, at one side of the first chamber 121, an inlet 102 into which the target material is introduced, an air distributor 104 for controlling the flow rate of the target material introduced into the inlet 102, and the first An auxiliary gas supply unit 176 for supplying an auxiliary gas (eg, hydrocarbon-based fuel) to the chamber 121, and a torch part 122 as an ignition device for a combustion reaction in the first chamber 121 . At this time, plasma is generated in the reaction space of the first chamber 121 and the target material may be supplied to the reaction space through the inlet 102 . In addition, the discharge tube 101 may be seated in the reaction space of the first chamber 121 to receive microwaves of a predetermined frequency and generate plasma in the reaction space.

In addition, the auxiliary gas supply unit 176 injects the auxiliary gas into the reaction space to cause a combustion reaction with the plasma generated in the reaction space.

In addition, the M / W plasma control device 160 for controlling the M / W plasma combustion device 120 includes a high-frequency oscillator control unit 165 for controlling the high-frequency oscillator 171 oscillating microwaves, and the M / W A display 161 for displaying the control state of the plasma controller 160, a power supply 162 for supplying power, and an MCU 166 for controlling the inflow of M/W power and gas such as auxiliary gas. ), and a chiller 163 installed below the system chamber as a cooling device of the entire cyclone plasma combustion and oxidation system 100 to adjust the temperature of the reactor, a high-frequency generator circulation motor 164, and a distributor 167.
Subsequently, the target material, which has been primarily treated through the continuous plasma reactor 140 connected to the M/W plasma combustion device 120, is sequentially subjected to secondary combustion and oxidation reactions through the gliding arc plasma oxidizing device 130. As the process progresses, target materials such as VOCs and odorous substances are removed by the high-temperature combustion reaction.
In addition, the first M / W plasma combustion device 120 and the second chamber 137 communicated through the continuous plasma reactor 140 and into which the target material subjected to the first combustion process is introduced, and high voltage power is supplied to the second chamber 137. Equipped with a gliding arc plasma oxidizer 130 that forms an arc through discharge in the second chamber 137 and secondarily treats the target material introduced into the second chamber 137 through an oxidation reaction through the generated plasma flame. do.
The gliding arc plasma oxidizer 130 includes a gliding arc plasma torch burner supply unit 135 supplying high voltage power, a gliding arc electrode hollow 131 into which fuel is injected through an internal hollow, and the gliding arc plasma torch burner supply unit 135. A gliding arc electrode holder 132 supporting the electrode hollow, a gliding arc electrode holder ceramic filter 133 connected to the gliding arc electrode holder 132 and provided with an external electrode to inject discharge gas therein, and the electrode It has a gliding arc body 134 supporting the holder ceramic filter, and an internal electrode 136 connected to the gliding arc body 134 and positioned inside the second chamber 137 to generate a plasma flame. Through this, the target material subjected to the primary combustion treatment is subjected to secondary plasma treatment through an oxidation reaction through the plasma flame generated through the gliding arc plasma oxidizing device 130 .
At this time, in the gliding arc plasma oxidizing device 130, a total of four two-module electrode bars can be formed, two each in a left-right symmetrical manner, and, like the gliding arc electrode holder ceramic filter 133, a ceramic material having good heat resistance with a plasma flame, etc. is preferable

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In addition, a control device 150 for controlling the gliding arc plasma oxidizing device 130 is provided in the lower part of the chamber of the plasma combustion oxidation system 100, and through the control device 150, remaining unreacted odor gas and Hazardous and toxic substances are treated with oxidation and combustion by high-temperature combustion.
Finally, it is filtered through the composite catalyst system 180 of the adsorption tower composed of a multi-stage or multi-layer structure catalytic filter or adsorbent having a honeycomb structure. The hybrid composite catalyst system 180 may be composed of a multi-layered adsorption tower or a multi-layered catalyst layer. Referring to FIG. 1, the hybrid composite catalyst system 180 is stacked from bottom to top, and a ceramic heat storage material 181 of a lower layer and a diatomaceous earth / SiO ₂ ceramic filter layer formed on the ceramic heat storage material 181 ( 182), a TiO ₂ active catalyst layer 183 formed on the diatomaceous earth/SiO ₂ ceramic filter 182, a KMnO4/ZnO catalyst layer 184 formed on the TiO ₂ active catalyst layer 183, and the KMnO4 It may be composed of a V ₂ O ₅ catalyst layer 185 formed on the /ZnO catalyst layer 184 and a zeolite adsorption layer 186 formed on the V ₂ O ₅ catalyst layer 185 . Here, the ceramic material of the ceramic heat storage material 181 and the ceramic filter layer 182 is a catalyst material that can be used at a high temperature of 800 ° C. or higher and can collect dust with high efficiency. In addition, catalysts such as TiO ₂ and V ₂ O ₅ can be formed as an outer coating layer and have high dust collection efficiency and removal efficiency of harmful toxic substances through catalytic reaction. In addition, zeolite is an adsorbent having a high specific surface area, and an effective surface area is very wide, enabling efficient treatment of a target material according to a high adsorption rate.

The principle of the waste gas plasma combustion oxidation reaction according to the present invention can be summarized as follows.

The principle of plasma combustion oxidation and reaction is that when a high electric field of 10 kV/cm or more is applied between the two discharge electrodes of the anode and cathode in an extremely short moment (within tens to hundreds of ns), a pulse corona discharge causes a brush-like shape. A current channel is formed, which is called a streamer. In the gloss, 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. Molecules that collide with high-energy electrons are ionized and decomposed by high-temperature combustion oxidation into active free electrons.
Through this, in the present invention, the target material generated at the industrial plant site is firstly burned through the M / W plasma combustion device 120, and secondarily, the plasma combustion and oxidation reaction is performed through the gliding arc plasma device 130 Thirdly, through the honeycomb-type hybrid composite catalyst system 180, the catalytic reaction is performed through a multi-stage structure or a multi-layer structure filter, and the target material purified to the outlet 103 through the gas transfer unit (1, 2, and 3 continuous processing) and discharges purified odorous gas and harmful toxic substances).

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Those skilled in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above information.

100: cyclone plasma combustion oxidation system
101: discharge tube
102: entrance
103: exit
104: Air distributor
120: M/W plasma combustion device
121: first chamber
122: Tochibu
130: gliding arc plasma oxidizer
131: gliding arc electrode Hollow
132: gliding arc electrode holder
133: gliding arc electrode holder ceramic filter
134: gliding arc body
135: gliding arc plasma torch burner supply unit
136: internal electrode
141: plasma continuous reactor
150: gliding arc plasma control device
151: main body of gliding arc plasma controller
160: M/W plasma controller
161: display
162: power supply
163: chiller
164: compressor
165: high frequency oscillator control unit
166 MCU
167: divider
170: microwave plasma supply unit
171: magnetron plasma high frequency generator
172 isolator
173: coupler
174: 3-stub tuner
175 Waveguide
176: auxiliary gas supply unit
180: honeycomb hybrid composite catalyst system
181: ceramic heat storage material
182: diatomaceous earth/SiO ₂ ceramic filter
183: TiO ₂ active catalyst layer
184: KMnO ₄ /ZnO catalyst layer
185: V ₂ O ₅ catalyst layer
186: zeolite adsorption layer

Claims (2)

A M/W plasma combustion device that burns the target material introduced into the first chamber through the inlet using microwave (M/W) to provide a primary treated target material; a gliding arc plasma oxidizing device for providing a target material subjected to secondary processing by performing a plasma combustion and oxidizing reaction of the target material firstly treated in the M/W plasma combustion device using gliding arc plasma in a second chamber; A hybrid composite catalyst system that catalyzes the secondly treated target material through the gliding arc plasma oxidizer into a multi-stage or multi-layered catalyst layer of a honeycomb structure to provide an exit for the finally treated target material; Including,
The M / W plasma combustion device includes an M / W plasma supply unit for generating M / W plasma, and a combustion reaction of the M / W plasma supplied through the M / W plasma supply unit with the target material introduced through the inlet including a discharge tube;
The M/W plasma supply unit connects a high-frequency oscillator that receives driving power supplied from the outside and oscillates M/W, and connects the high-frequency oscillator and the first chamber to move the M/W generated by the high-frequency oscillator. A waveguide as a path, an isolator that protects the high frequency oscillator by outputting M/W oscillated by the high frequency oscillator and at the same time extinguishing the M/W energy reflected by the impedance mismatch, and disposed at a rear end of the isolator, the high frequency oscillator A coupler that couples the M/W generated from the coupler, and by adjusting the intensity of the incident wave and the reflected wave of the M/W output from the coupler, impedance matching is induced so that the electric field induced by the M/W is maximized in the first chamber. Cyclone plasma combustion oxidation system, characterized in that it comprises a three-stove tuner to be. According to claim 1,
The hybrid composite catalyst system, while stacking from the bottom to the top,
The ceramic heat storage material of the lower layer,
A diatomaceous earth/SiO ₂ ceramic filter layer formed on the ceramic heat storage material;
A TiO ₂ active catalyst layer formed on the diatomaceous earth/SiO ₂ ceramic filter layer;
A KMnO4/ZnO catalyst layer formed on the TiO ₂ active catalyst layer;
A V ₂ O ₅ catalyst layer formed on the KMnO4 / ZnO catalyst layer;
A cyclone plasma combustion oxidation system comprising a zeolite adsorption layer formed on the V ₂ O ₅ catalyst layer.

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