Conservation gas generating apparatus using heat plasma and conservation gas generating method using heat plasma

Abstract

The present invention provides a preservation gas generating apparatus using thermal plasma capable of efficiently producing preservation gas and a preservation gas generating method using thermal plasma. A preservation gas generation device using thermal plasma according to one embodiment of the present invention includes a plasma reactor that decomposes a discharge gas using thermal plasma, and a discharge gas supply pipe that supplies the discharge gas containing nitrogen, and the plasma reactor can generate nitrogen oxides by thermally decomposing the discharge gas.

Description

Technology Field

[0001] The present invention relates to an apparatus and method for generating a preservation gas that improves the shelf life of fruits and vegetables by decomposing a reaction gas containing nitrogen using thermal plasma. Background Technology

[0002] Nitrogen oxides are primarily produced when oxygen and nitrogen in the air react under high-temperature conditions, such as combustion processes. Generally, because nitrogen oxides are a major cause of fine dust and act as a cause of acid rain in the atmosphere, various technologies are being applied to remove nitrogen oxides emitted from combustion devices, industrial furnaces, and internal combustion engines.

[0003] However, when agricultural products are intermittently exposed to low concentrations of nitrogen oxides at levels of a few ppm or less, the storability of plants such as fruits and vegetables may be improved due to the growth inhibition effect.

[0004] Although ozone is classified as a harmful substance in the atmosphere that can cause respiratory damage, a small amount of ozone can improve the shelf life of fruits in plant storage.

[0005] Ozone decomposes easily at high temperatures and is produced via a low-temperature plasma method, whereas nitrogen oxides are primarily generated at high temperatures and are produced by establishing high-temperature conditions. Consequently, it is difficult to produce nitrogen oxides and ozone simultaneously. The problem to be solved

[0006] The present invention provides a preservation gas generating apparatus using thermal plasma capable of efficiently producing preservation gas and a preservation gas generating method using thermal plasma. means of solving the problem

[0007] A preservation gas generation device using thermal plasma according to one embodiment of the present invention includes a plasma reactor that decomposes a discharge gas using thermal plasma, and a discharge gas supply pipe that supplies the discharge gas containing nitrogen, and the plasma reactor can generate nitrogen oxides by thermally decomposing the discharge gas.

[0008] The discharge gas according to one embodiment of the present invention may consist of air or a mixed gas of nitrogen and oxygen.

[0009] According to one embodiment of the present invention, the discharge gas may consist of nitrogen gas or a mixture of nitrogen and oxygen.

[0010] The plasma reactor according to one embodiment of the present invention can generate ozone together with nitrogen oxides by controlling the flow rate of the discharge gas.

[0011] According to one embodiment of the present invention, the plasma reactor may include a housing that is grounded and has a discharge passage formed therein for discharging decomposition gas, and a discharge electrode inserted inside the housing that is charged with a discharge voltage.

[0012] In the housing according to one embodiment of the present invention, a cooling nozzle that sprays cooling air toward the discharge passage may be installed.

[0013] A cooling reactor for cooling the gas discharged from the discharge passage may be connected downstream of the plasma reactor according to one embodiment of the present invention.

[0014] In the cooling reactor according to one embodiment of the present invention, a cooling nozzle may be installed to spray cooling air toward the decomposition gas discharged from the discharge passage.

[0015] In the housing according to one embodiment of the present invention, a cooling passage may be formed to which cooling air for cooling decomposition gas is supplied.

[0016] A method for generating a preservation gas using thermal plasma according to another embodiment of the present invention may include a discharge gas supply step of supplying a discharge gas containing nitrogen, a plasma generation step of generating a thermal plasma using a plasma reactor, and a thermal decomposition step of heating and thermally decomposing the discharge gas using the thermal plasma.

[0017] According to another embodiment of the present invention, the pyrolysis step may generate nitrogen oxides by pyrolyzing oxygen together with nitrogen.

[0018] A method for generating a preservation gas using thermal plasma according to another embodiment of the present invention may further include an ozone generation step of generating ozone by injecting cooling air into the decomposition gas generated in the thermal decomposition step.

[0019] According to another embodiment of the present invention, the pyrolysis step is carried out inside the plasma reactor, and the ozone generation step may inject cooling air into the plasma reactor.

[0020] According to another embodiment of the present invention, the ozone generation step may spray cooling air toward the decomposition gas discharged from the plasma reactor.

[0021] According to another embodiment of the present invention, the pyrolysis step can generate nitrogen oxides and ozone when an excess amount of discharge gas is supplied. Effects of the invention

[0022] As described above, according to the present invention, nitrogen oxides can be easily generated by decomposing air or nitrogen gas using plasma. In addition, ozone can be easily generated by rapidly cooling the decomposed gas. Brief explanation of the drawing

[0023] FIG. 1 is a drawing illustrating a preservation gas generating device according to a first embodiment of the present invention. FIG. 2 is a flowchart for explaining a preservation gas generation method according to a first embodiment of the present invention. FIG. 3 is a drawing illustrating a preservation gas generating device according to a second embodiment of the present invention. FIG. 4 is a flowchart for explaining a preservation gas generation method according to a second embodiment of the present invention. FIG. 5 is a drawing illustrating a preservation gas generating device according to a third embodiment of the present invention. FIG. 6 is a flowchart illustrating a method for generating preservation gas according to a third embodiment of the present invention. FIG. 7 is a drawing illustrating a preservation gas generating device according to the fourth embodiment of the present invention. FIG. 8 is a flowchart for explaining a preservation gas generation method according to a fourth embodiment of the present invention. Specific details for implementing the invention

[0024] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0025] The terms used in this invention are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this invention, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that in the accompanying drawings, identical components are indicated by the same reference numerals whenever possible. Furthermore, detailed descriptions of known functions and configurations that may obscure the essence of the present invention will be omitted. For the same reason, some components in the accompanying drawings may be exaggerated, omitted, or schematically depicted.

[0027] Hereinafter, a preservation gas generating device according to the first embodiment of the present invention will be described.

[0028] FIG. 1 is a drawing illustrating a preservation gas generating device according to a first embodiment of the present invention.

[0029] Referring to FIG. 1, the preservation gas generating device (101) according to the first embodiment of the present invention relates to a preservation gas generating device capable of suppressing the ripening of fruits or vegetables and increasing the storage period of agricultural products. The preservation gas is a gas that prevents ripening and spoilage of fruits and vegetables and increases storability, and may include nitrogen oxides and ozone.

[0030] A preservation gas generating device (101) according to the first embodiment of the present invention may include a plasma reactor (110) and a discharge gas supply pipe (150). The plasma reactor (110) generates a high-temperature thermal plasma (PZ1) and uses the thermal plasma (PZ1) to thermally decompose a discharge gas containing nitrogen.

[0031] The plasma reactor (110) may be an arc plasma reactor capable of generating high-temperature conditions and rapidly lowering the temperature. Additionally, the plasma reactor (110) may be an inductively coupled plasma reactor (ICP) or a microwave plasma reactor using RF frequencies. In the following description, the plasma reactor (110) is described as an example of being an arc plasma reactor, but the present invention is not limited thereto.

[0032] A plasma reactor (110) may include a housing (112) and a discharge electrode (113). The housing (112) is formed in a cylindrical shape having an internal space, and an arc discharge occurs inside the housing (112). To this end, the housing (112) may be grounded.

[0033] The discharge gas introduced into the housing (112) by arc discharge is heated to a high temperature and can be converted into a plasma state.

[0034] An inlet passage (114) is formed in the housing (112), and a discharge gas supply pipe (150) is connected to the inlet passage (114). The inlet passage (114) may be formed at the rear end (downstream side) of the housing (112), but the present invention is not limited thereto, and the inlet passage (114) may also be formed on the outer surface of the housing (112).

[0035] The discharge gas supply pipe (150) can supply air or a gas containing nitrogen and oxygen to the plasma reactor (110) to cause a plasma discharge. Additionally, the discharge gas supply pipe (150) can supply nitrogen gas or a mixture of nitrogen and oxygen to the plasma reactor.

[0036] At one end in the longitudinal direction of the housing (112), a guide inclined surface (116) is formed that is inclined with respect to the longitudinal direction of the housing (112) to guide the flow of decomposed gas decomposed by heat toward the discharge passage (115).

[0037] The discharge electrode (113) is inserted inside the housing (112) and can be charged with a driving voltage. The discharge electrode (113) is charged with a direct current or alternating current voltage and is charged with a high voltage sufficient to form an arc (AC). An insulating structure (118) for insulation can be installed between the discharge electrode (113) and the housing (112).

[0038] The discharge electrode (113) forms an arc (AC) between itself and the housing (112) to thermally decompose the discharge gas, and the arc (AC) can be formed between the front part of the discharge electrode (113) and the discharge passage (115). As the discharge gas passes through the arc generation area and the discharge passage (115), it is rapidly heated and thermally decomposed.

[0039] When air or a gas containing nitrogen and oxygen is thermally decomposed in a plasma reactor (110), nitrogen and oxygen may react to produce nitrogen oxides. Additionally, if the supply flow rate of the discharge gas supplied into the housing (112) is increased, only some of the air is thermally decomposed to produce nitrogen oxides, and the remaining air cools the decomposed gas to produce ozone.

[0040] As described above, the preservation gas generating device (101) according to the present embodiment can not only generate nitrogen oxides by decomposing air using thermal plasma (PZ1), but can also generate nitrogen oxides and ozone simultaneously.

[0041] Hereinafter, a method for generating preservation gas according to the first embodiment of the present invention will be described.

[0042] FIG. 2 is a flowchart for explaining a preservation gas generation method according to a first embodiment of the present invention.

[0043] Referring to FIGS. 1 and 2, the preservation gas generation method according to the first embodiment may include a discharge gas supply step (S101), a thermal plasma generation step (S102), and a pyrolysis step (S103).

[0044] The discharge gas supply step (S101) supplies air containing nitrogen and oxygen to the plasma reactor (110). The discharge gas supply step (S101) can control the flow rate of the discharge gas depending on whether ozone is required.

[0045] The thermal plasma generation step (S102) generates high-temperature thermal plasma inside the plasma reactor (110). The thermal plasma generation step (S102) generates high-temperature thermal plasma and can heat the reaction gas to 1,000 to 3,000 degrees Celsius. The thermal plasma generation step (S102) can generate high-temperature thermal plasma (PZ1) using an arc (AC).

[0046] The pyrolysis step (S103) pyrolyzes the discharge gas to produce nitrogen oxides. The pyrolysis step (S103) can pyrolyze nitrogen and oxygen to produce nitric oxide or nitrogen dioxide. The pyrolysis step (S103) produces nitrogen oxides when only a small amount of discharge gas is supplied relative to the power supplied for plasma generation, and can produce nitrogen oxides and ozone together when an excess amount of discharge gas is supplied.

[0047] When an excess amount of discharge gas is supplied, some of the air is thermally decomposed, while the rest of the air is not thermally decomposed. Therefore, the products generated by the thermal decomposition of the discharge gas are cooled by the surrounding air, and the thermally decomposed oxygen radicals and oxygen molecules can react to produce ozone.

[0048] Meanwhile, when a small amount of discharge gas is supplied, most of the air or nitrogen and oxygen are thermally decomposed, and since the temperature inside the plasma reactor (110) is high, only nitrogen oxide, which is a high-temperature product, can be produced.

[0049] Hereinafter, a preservation gas generating device according to the second embodiment of the present invention will be described.

[0050] FIG. 3 is a drawing illustrating a preservation gas generating device according to a second embodiment of the present invention.

[0051] Referring to FIG. 3, the preservation gas generating device (102) according to the second embodiment may include a plasma reactor (110), a discharge gas supply pipe (150), and a cooling reactor (120).

[0052] A plasma reactor (110) may include a housing (112) and a discharge electrode (113). The housing (112) is formed in a cylindrical shape having an internal space, and an arc discharge occurs inside the housing (112). To this end, the housing (112) may be grounded.

[0053] An inlet passage (117) is formed on the outer surface of the housing (112), and a discharge gas supply pipe (150) is connected to the inlet passage (117). A distribution passage (153) extending in the perimeter direction of the housing is formed in the housing (112), and a plurality of inlet passages (117) can be connected to the distribution passage (153).

[0054] The discharge gas supply pipe (150) can be connected to the inflow passage (117) via the distribution passage (153). The inflow passage (117) is connected in an eccentric direction with respect to the center of the housing (112) so that the discharge gas can be injected to form a swirl.

[0055] The discharge gas supply pipe (150) can supply air containing nitrogen and oxygen to the plasma reactor (110) to cause a plasma discharge. Additionally, the discharge gas supply pipe (150) can supply nitrogen gas or a mixture of nitrogen and oxygen to the plasma reactor.

[0056] The discharge electrode (113) is inserted inside the housing (112) and can be charged with a driving voltage. The discharge electrode (113) is charged with a direct current or alternating current voltage and is charged with a high voltage sufficient to form an arc (AC). An insulating structure (118) for insulation can be installed between the discharge electrode (113) and the housing (112).

[0057] A cooling reactor (120) is installed downstream of a plasma reactor (110) and cools the gas discharged from the plasma reactor (110). The cooling reactor (120) is fixed to the plasma reactor (110), and a cooling nozzle (125) may be installed inside the cooling reactor (120). The cooling nozzle (125) extends toward the discharge passage (115) and sprays cooling air toward the decomposition gas discharged from the housing (112).

[0058] Accordingly, the decomposition gas discharged from the housing (112) is rapidly cooled by the cooling air, and the oxygen radicals contained in the decomposition gas can react with the oxygen molecules contained in the cooling air to form ozone.

[0059] Meanwhile, nitrogen may be supplied as a reaction gas to the plasma reactor (110). In this case, nitrogen radicals are generated in the plasma reactor (110), and nitrogen oxides are not generated. The nitrogen radicals generated in the plasma reactor (110) may react with oxygen contained in the cooling air after being discharged from the housing (112) to form nitrogen oxides.

[0060] Hereinafter, a method for generating preservation gas according to a second embodiment of the present invention will be described.

[0061] FIG. 4 is a flowchart for explaining a preservation gas generation method according to a second embodiment of the present invention.

[0062] Referring to FIGS. 3 and 4, the preservation gas generation method according to the first embodiment may include a discharge gas supply step (S201), a thermal plasma generation step (S202), a pyrolysis step (S203), and an ozone generation step (S204).

[0063] The discharge gas supply step (S201) supplies air containing nitrogen and oxygen to the plasma reactor (110). The discharge gas supply step (S201) may also supply nitrogen gas to the plasma reactor. The discharge gas supply step (S201) may form a swirl by injecting the discharge gas in an eccentric direction with respect to the center of the housing (112).

[0064] The thermal plasma generation step (S202) generates high-temperature thermal plasma inside the plasma reactor (110). The thermal plasma generation step (S202) generates high-temperature thermal plasma (PZ1) and can heat the reaction gas to 1000°C to 3000°C. The thermal plasma generation step (S202) can generate high-temperature thermal plasma (PZ1) using an arc (AC).

[0065] The pyrolysis step (S203) pyrolyzes the discharge gas to produce nitrogen oxides. The pyrolysis step (S203) can pyrolyze nitrogen and oxygen to produce nitric oxide or nitrogen dioxide. If the discharge gas is nitrogen, the pyrolysis step (S203) can decompose only nitrogen without producing nitrogen oxides.

[0066] The ozone generation step (S204) is performed by decomposing in the pyrolysis step (S203) and rapidly cooling the decomposed gas discharged from the plasma reactor (110) by injecting cooling air into it, thereby generating ozone through the reaction between oxygen radicals (atoms) and oxygen. Additionally, the ozone generation step (S204) may generate ozone by injecting air into the decomposed nitrogen gas to produce nitrogen oxides while simultaneously reacting oxygen radicals with oxygen.

[0067] Hereinafter, a preservation gas generating device according to the third embodiment of the present invention will be described.

[0068] FIG. 5 is a drawing illustrating a preservation gas generating device according to a third embodiment of the present invention.

[0069] Referring to FIG. 5, the preservation gas generating device (103) according to the third embodiment is structured identically to the preservation gas generating device according to the first embodiment, except for the cooling nozzle (131), so a redundant description of the same configuration is omitted.

[0070] The preservation gas generating device (103) according to the present embodiment may include a plasma reactor (110) and a discharge gas supply pipe (150).

[0071] A plasma reactor (110) may include a housing (112) and a discharge electrode (113). The housing (112) is formed in a cylindrical shape having an internal space, and an arc discharge occurs inside the housing (112). Material introduced into the housing (112) by the arc discharge is heated to a high temperature and can be converted into a plasma state.

[0072] Additionally, an inlet passage (114) and an outlet passage (115) are formed in the housing (112), and a discharge gas supply pipe (150) is connected to the inlet passage (114).

[0073] A cooling nozzle (131) is installed in the housing (112) to spray cooling air toward the exhaust passage (115). The cooling nozzle (131) is positioned at an angle to the inner wall of the housing (112) and extends toward the exhaust passage (115). The cooling nozzle (131) cools the decomposition gas containing nitrogen oxides generated by the thermal plasma (PZ1).

[0074] Accordingly, the decomposition gas is rapidly cooled as it is discharged through the discharge passage (115), and the oxygen radicals contained in the decomposition gas can react with oxygen molecules contained in the cooling air to form ozone.

[0075] Meanwhile, nitrogen may be supplied as a reaction gas to the plasma reactor (110). In this case, nitrogen radicals (atoms) are generated in the plasma reactor (110), and the cooling air and nitrogen radicals can react to form nitrogen oxides.

[0076] Hereinafter, a method for generating preservation gas according to the third embodiment of the present invention will be described.

[0077] FIG. 6 is a flowchart illustrating a method for generating preservation gas according to a third embodiment of the present invention.

[0078] Referring to FIGS. 5 and 6, the preservation gas generation method according to the third embodiment may include a discharge gas supply step (S301), a thermal plasma generation step (S302), a pyrolysis step (S303), and an ozone generation step (S304).

[0079] The discharge gas supply step (S301) supplies air containing nitrogen and oxygen to the plasma reactor (110). The discharge gas supply step (S301) may also supply nitrogen gas to the plasma reactor (110).

[0080] The thermal plasma generation step (S302) generates high-temperature thermal plasma inside the plasma reactor (110). The thermal plasma generation step (S302) generates high-temperature thermal plasma (PZ1) and can heat the reaction gas to 1000°C to 3000°C. The thermal plasma generation step (S302) can generate high-temperature thermal plasma (PZ1) using an arc (AC).

[0081] The pyrolysis step (S303) pyrolyzes the discharge gas to produce nitrogen oxides. The pyrolysis step (S303) can pyrolyze nitrogen and oxygen to produce nitric oxide or nitrogen dioxide. If the discharge gas is nitrogen, the pyrolysis step (S303) can decompose only nitrogen without producing nitrogen oxides.

[0082] The ozone generation step (S304) involves injecting cooling air into the decomposed gas from the pyrolysis step (S303), using a cooling nozzle (131) installed inside the plasma reactor (110) to inject the cooling air toward the discharge passage (115). Due to the injection of cooling air, the decomposed gas is rapidly cooled inside the plasma reactor (110), and at this time, ozone is generated through the reaction between oxygen radicals and oxygen molecules. Additionally, the ozone generation step (S304) may generate ozone by injecting air into the decomposed nitrogen gas to generate nitrogen oxides while simultaneously reacting oxygen radicals with oxygen.

[0083] FIG. 7 is a drawing illustrating a preservation gas generating device according to the fourth embodiment of the present invention.

[0084] Referring to FIG. 7, the preservation gas generating device (104) according to the fourth embodiment is structured identically to the preservation gas generating device (102) according to the first embodiment, except for the inlet passage and the cooling passage, so a redundant description of the same configuration is omitted.

[0085] A preservation gas generating device (104) according to the fourth embodiment of the present invention may include a plasma reactor (110) and a discharge gas supply pipe (150). The plasma reactor (110) generates a high-temperature thermal plasma (PZ1) and uses the thermal plasma (PZ1) to thermally decompose a discharge gas containing nitrogen.

[0086] The plasma reactor (110) may be an arc plasma reactor capable of generating high-temperature conditions and rapidly lowering the temperature. The plasma reactor (110) may include a housing (112) and a discharge electrode (113). The housing (112) is formed in a cylindrical shape having an internal space, and an arc discharge occurs inside the housing (112). To this end, the housing (112) may be grounded. Material introduced into the housing (112) by the arc discharge is heated to a high temperature and can be converted into a plasma state.

[0087] A cooling passage (132) is formed in the housing (112), and a cooling air supply pipe (156) is connected to the cooling passage. A circulation passage (157) is formed in the housing (112), and the circulation passage (157) may be formed extending in the circumferential direction of the housing (112). The cooling air supply pipe (156) may be connected to the cooling passage via the circulation passage (157).

[0088] The cooling passage (132) may be extended in an eccentric direction with respect to the center of the housing (112) to allow cooling air to be sprayed to form a swirl. Additionally, the cooling passage (132) may be extended at an angle to the outer surface of the housing (112) in a direction toward the exhaust passage (115). Accordingly, the cooling air may be sprayed in a direction toward the exhaust passage (115) to form a swirl.

[0089] The discharge electrode (113) is inserted inside the housing (112) and can be charged with a driving voltage. The discharge electrode (113) is charged with a direct current or alternating current voltage and is charged with a high voltage sufficient to form an arc (AC). An insulating structure (118) for insulation can be installed between the discharge electrode (113) and the housing (112).

[0090] An inlet passage (135) through which discharge gas is supplied is formed in the discharge electrode (113), and the inlet passage (135) may extend along the longitudinal direction of the discharge electrode (113). A discharge gas supply pipe (150) is connected to the discharge electrode (113) and supplies air to the inlet passage (135).

[0091] Accordingly, the discharge gas is injected into the central area of ​​the housing (112) to be heated and decomposed, and the cooling air is injected into a location relatively far from the center of the housing (112) to cool the discharge gas.

[0092] Hereinafter, a method for generating preservation gas according to the fourth embodiment of the present invention will be described.

[0093] FIG. 8 is a flowchart for explaining a preservation gas generation method according to a fourth embodiment of the present invention.

[0094] Referring to FIGS. 7 and 8, the preservation gas generation method according to the fourth embodiment may include a discharge gas supply step (S401), a thermal plasma generation step (S402), a pyrolysis step (S403), and an ozone generation step (S404).

[0095] The discharge gas supply step (S401) supplies air containing nitrogen and oxygen to the plasma reactor (110). The discharge gas supply step (S401) can inject the discharge gas into the center of the width direction of the housing (112) through an inlet passage (135) formed in the discharge electrode (113).

[0096] The thermal plasma generation step (S402) generates high-temperature thermal plasma inside the plasma reactor (110). The thermal plasma generation step (S402) generates high-temperature thermal plasma (PZ1) and can heat the reaction gas to 1000°C to 3000°C. The thermal plasma generation step (S402) can generate high-temperature thermal plasma (PZ1) using an arc (AC).

[0097] The pyrolysis step (S403) pyrolyzes the discharge gas to produce nitrogen oxides. The pyrolysis step (S403) can pyrolyze nitrogen and oxygen to produce nitric oxide or nitrogen dioxide. If the discharge gas is nitrogen, the pyrolysis step (S403) can decompose only nitrogen without producing nitrogen oxides.

[0098] The ozone generation step (S404) involves injecting cooling air into the decomposition gas decomposed in the pyrolysis step (S403), specifically through an injection passage (132) formed inside the plasma reactor (110). The cooling air may be injected to form a swirl, and the decomposition gas is rapidly cooled inside the plasma reactor (110) by the cooling air. At this time, ozone is generated through the reaction between oxygen radicals (excited atoms) and oxygen.

[0099] Although an embodiment of the present invention has been described above, those skilled in the art may modify and change the present invention in various ways by adding, changing, deleting, or adding components, etc., without departing from the spirit of the present invention as described in the claims, and such modifications and changes are also to be included within the scope of the rights of the present invention. Explanation of the symbols

[0100] 101: Conservation gas generation device 110: Plasma reactor 112: Housing 113: Discharge electrode 114, 117, 135: Inlet passage 115: Outlet passage 116: Guide slope 118: Insulating structure 120: Cooling reactor 125, 131: Cooling nozzles 132: Cooling passage 150: Discharge gas supply pipe 153: Distribution passage 156: Cooling air supply pipe 157: Circulation Passage

Claims

Claim 1 A preservation gas generating device using thermal plasma, comprising: a plasma reactor for decomposing a discharge gas using thermal plasma; and a discharge gas supply pipe for supplying the discharge gas containing nitrogen; wherein the plasma reactor thermally decomposes the discharge gas to produce nitrogen oxides, and a cooling nozzle is installed to spray cooling air toward the decomposed gas thermally decomposed in the plasma reactor. Claim 2 A preservation gas generating device using thermal plasma, characterized in that, in claim 1, the discharge gas is composed of air or a mixed gas containing nitrogen and oxygen. Claim 3 A preservation gas generating device using thermal plasma, characterized in that, in claim 1, the discharge gas is composed of nitrogen gas or a mixture of nitrogen and oxygen. Claim 4 A preservation gas generating device using thermal plasma, characterized in that, in paragraph 2, the plasma reactor controls the flow rate of the discharge gas to generate ozone together with nitrogen oxides. Claim 5 A preservation gas generating device using thermal plasma according to claim 1, characterized in that the plasma reactor comprises a housing that is grounded and has a discharge passage formed therein for discharging decomposition gas, and a discharge electrode inserted inside the housing that is charged with a discharge voltage. Claim 6 A preservation gas generating device using thermal plasma, characterized in that, in any one of claims 3 to 5, the housing is equipped with a cooling nozzle that sprays cooling air toward the discharge passage. Claim 7 A conservation gas generating device using thermal plasma, characterized in that, in claim 5, a cooling reactor for cooling the gas discharged from the discharge passage is connected downstream of the plasma reactor. Claim 8 A preservation gas generating device using thermal plasma, characterized in that, in any one of claims 3 to 5, the cooling reactor is equipped with a cooling nozzle that sprays cooling air toward the decomposition gas discharged from the discharge passage. Claim 9 delete Claim 10 A method for generating a conservation gas using thermal plasma, comprising: a discharge gas supply step for supplying a discharge gas containing nitrogen; a plasma generation step for generating a thermal plasma using a plasma reactor; and a thermal decomposition step for heating and thermally decomposing the discharge gas using the thermal plasma; and further comprising an ozone generation step for generating ozone by injecting cooling air into the decomposition gas generated in the thermal decomposition step. Claim 11 A method for generating conservation gas using thermal plasma, wherein, in claim 10, the above-mentioned pyrolysis step is characterized by pyrolyzing oxygen together with nitrogen to produce nitrogen oxides. Claim 12 delete Claim 13 A method for generating a conservation gas using thermal plasma, wherein, in claim 10, the pyrolysis step is performed inside the plasma reactor, and the ozone generation step is characterized by injecting cooling air into the plasma reactor. Claim 14 In claim 10, the ozone generation step is characterized by injecting cooling air toward the decomposition gas discharged from the plasma reactor, in a method for generating a conservation gas using thermal plasma. Claim 15 A method for generating conservation gas using thermal plasma, wherein, in claim 10, the above-mentioned pyrolysis step generates nitrogen oxides and ozone when an excess amount of discharge gas is supplied.

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