Deodorizing device using microwaves

Abstract

The present invention relates to a deodorizing device using microwaves, comprising: an input portion that sucks and inputs odor; a first deodorizing portion that first processes the odor by electrolytic water of an acid decomposition tank; a second deodorizing portion that second processes the odor by a heating fiber filter; a first heating portion that heats the first deodorizing portion by microwaves; a second heating portion that heats the second deodorizing portion by microwaves; and an electrolytic water generating portion that supplies electrolytic water to the first deodorizing portion. Thus, the present invention provides the effect that the separation of odor-causing substances in a large volume of odor can be achieved using acid solvent as high-activity electrolytic water, and at the same time, a heating material having a large dielectric loss by absorbing microwaves is used, so that odor-causing substances decomposed by microwaves in the acid decomposition tank in the electrolytic water oxidation device can be removed in a high-temperature contact oxidation manner in the later stage.

Description

Technical Field

[0001] This invention relates to a microwave deodorization device, and more specifically, to a microwave deodorization device for removing malodorous substances from odorous gases using microwaves. Background Technology

[0002] Generally, foul odor refers to smells that irritate the nervous system and cause mental and physical harm. Such odor-inducing substances vary widely depending on the source. Major sources of foul odor in cities include sewage treatment plants, incinerators, food waste treatment facilities, landfills, composting facilities, oil refineries, chemical plants, and sewage and livestock wastewater treatment plants.

[0003] The odors generated by odor-generating facilities are caused by putrefactive substances or various volatile organic compounds. They not only cause discomfort but are also harmful to human health. They can even lead to decreased efficiency or an increase in safety accidents due to reduced attention, thus posing a variety of problems.

[0004] Ammonia, methanethiol, hydrogen sulfide, dimethyl sulfide, dimethyl sulfide, trimethylamine, acetaldehyde, styrene, and other such malodorous components are classified as legally regulated substances and are subject to control.

[0005] Based on pH, malodorous substances can be classified into alkaline, acidic, and neutral categories. For example, ammonia and trimethylamine are alkaline, hydrogen sulfide, methanethiol, propionic acid, butyric acid, and isovaleric acid are acidic, and dimethyl sulfide, dimethyl sulfide, and acetaldehyde are neutral.

[0006] Existing methods for removing these malodorous substances can be broadly categorized into physical, chemical, and biological treatment methods. Currently, the main methods used include combustion, washing, oxidation, adsorption, and microbial treatment.

[0007] Combustion is effective in removing almost all flammable odorous components, but the fuel cost or maintenance costs required for catalyst replacement are high. If operation and management are neglected, nitrogen oxides will be produced, and there is also a risk of explosion.

[0008] Adsorption is a method that uses activated carbon to remove odors. Various odorous components accumulate in the pores of activated carbon. When the adsorption reaches saturation, it loses its deodorizing effect and the odor flows out. At this time, new carbon should be used to replace the adsorbed carbon. If the concentration of the target substance is high, it has the disadvantage of having to perform activated carbon adsorption after reducing the concentration through pretreatment steps such as washing, absorption, cooling, and coagulation.

[0009] Moreover, the microbial treatment method utilizes microorganisms to decompose the adsorbed malodorous components when malodorous substances pass through sawdust or soil. When the breeding conditions of microorganisms are properly adjusted, the ability to remove malodorous substances is excellent and no secondary pollutants are produced. However, it has the disadvantages of requiring too much land and taking too long.

[0010] Furthermore, the cleaning method, which uses water or acid / alkali solutions to wash away odors, has the advantages of simple equipment and low operating costs, but it has the problems of a narrow range of applicability to malodorous components and low deodorization effect.

[0011] In particular, while existing deodorization devices can achieve deodorization to some extent, they require expensive equipment, resulting in high equipment costs. Furthermore, frequent replacement of adsorption filters and platinum catalysts is necessary to improve deodorization efficiency, leading to high maintenance and management costs.

[0012] Furthermore, existing microwave deodorization devices refer to devices that apply the following principle: when a substance is soaked in an acidic solution and irradiated with microwaves, the substance is oxidized by the acidic solution, and the polar components break their molecular bonds due to rapid vibration and collision, thereby decomposing the substance into an aqueous solution in an ionic state.

[0013] However, existing microwave acid decomposition systems suffer from operational difficulties and environmental limitations when using strong acid solvents, thus limiting their application to small-scale experiments.

[0014] Existing technical documents

[0015] Patent documents

[0016] Patent Document 0001: Korean Patent Publication No. 10-2020-0061939 (June 3, 2020)

[0017] Patent Document 0002: Korean Patent No. 10-1162094 (July 3, 2012)

[0018] Patent Document 0003: Korean Patent No. 10-2162077 (October 7, 2020) Summary of the Invention

[0019] The present invention addresses the aforementioned problems and aims to provide a microwave deodorization device that uses an acid solvent as a highly active water electrolyzer to separate odor-causing substances from a large volume of odorous gas. Simultaneously, it employs a heating material with high dielectric loss due to microwave absorption, thereby removing the odor-causing substances decomposed by microwave acid in the previous stage of the water electrolysis oxidation device through high-temperature contact oxidation in the later stage.

[0020] Furthermore, another object of the present invention is to provide a microwave deodorization device having an additional step for preparing HOCl solvent used in the deodorization device. This step solves the problems of complex steps that require direct generation of HOCl solvent through an electrolytic water preparation device for recycling, as well as the problems of generating acid decomposition raw materials and the acid decomposition treatment of malodorous substances.

[0021] Furthermore, another object of the present invention is to provide a microwave-based deodorization device in which odor-causing substances are treated by impregnating ion exchange resin in electrolyzed water in an acid decomposition tank through which inhaled odorous gases are passed and in contact with electrolyzed water, and the electrolyzed water and ion exchange resin are heated by irradiating them with microwaves. In this way, only the adsorbed odor-causing substances are decomposed without dielectric loss due to the absorption and reaction of microwaves by the ion exchange resin itself as heat. This allows the ion exchange resin to be used in a semi-permanent manner without the need for additional regeneration or replacement of the adsorbed substances in the pores of the ion exchange resin.

[0022] Furthermore, another object of the present invention is to provide a microwave deodorization device in which a SiC series microwave absorbing heating material with high dielectric loss is used as a heating fiber filter by means of microwave dielectric heating. In this way, the odor-causing substances and residual pollutants are oxidized and burned. By making the SiC fiber structure radially intersected at high density, the contact area is maximized. At the same time, the problem of the odor input being reduced due to the pressure of the circulating gas is solved, thereby increasing the processing capacity per unit time.

[0023] Furthermore, another object of the present invention is to provide a microwave-based deodorization device in which dilute hydrochloric acid or sodium chloride is added to ordinary water in an electrolytic water generation section, and highly active electrolyzed water with a pH range of 6 to 7 is generated by electrolysis. This water has the characteristics of being highly oxidizing but harmless to the environment. When in contact with organic matter, it decomposes into water and a small amount of sodium, thereby enabling safe and effective deodorization without causing environmental pollution to the discharge of circulating water.

[0024] To achieve the aforementioned objective, the microwave deodorization device of the present invention includes: an input unit 10 for drawing in and inputting odorous gas; a first deodorization unit 20 disposed downstream of the input unit 10 for firstly treating the odorous gas with electrolyzed water in an acid decomposition tank; a second deodorization unit 30 disposed downstream of the first deodorization unit 20 for secondly treating the odorous gas with a heated fiber filter; a first heating unit 40 disposed around the outer periphery of the first deodorization unit 20 for heating the first deodorization unit 20 with microwaves; a second heating unit 50 disposed around the outer periphery of the second deodorization unit 30 for heating the second deodorization unit 30 with microwaves; and an electrolyzed water generating unit 90 disposed upstream of the first deodorization unit 20 for supplying electrolyzed water to the first deodorization unit 20.

[0025] Furthermore, the microwave-based deodorization device of the present invention further includes: a drainage section 70 disposed on the other side downstream of the first deodorization section 20, which discharges the circulating water discharged from the first deodorization section 20 to the outside; and a circulation pump section 80 disposed on the other side downstream of the first deodorization section 20, which circulates the circulating water discharged from the first deodorization section 20.

[0026] The first deodorizing unit 20 of the present invention consists of an odor inhalation tube and an acid decomposition tank that allows the inhaled odor to pass through and come into contact with electrolyzed water. Ion exchange resin is impregnated in the electrolyzed water to allow the odor-causing substances to pass through and be treated, and microwaves from the first heating unit 40 are irradiated onto the electrolyzed water and the ion exchange resin.

[0027] The second deodorizing unit 30 of the present invention has a guide plate at the odor inlet. As the input gas rotates inside the chamber, the heating fiber filter is arranged in a radial cross pattern to maximize the contact area. Furthermore, the microwave irradiation amount of the second heating unit 50 is adjusted according to the internal temperature.

[0028] The electrolyzed water generation unit 90 of the present invention adds dilute hydrochloric acid or sodium chloride to ordinary water and generates highly active electrolyzed water in the pH range of 6 to 7 through electrolysis.

[0029] As described above, the present invention provides the following effects: by using an acid solvent as a highly active water electrolyzer to separate malodorous substances from a large volume of odorous gas, and by using a heating material with high dielectric loss due to microwave absorption, the malodorous substances decomposed by microwave acid in the previous stage can be removed in the later stage by high-temperature contact oxidation.

[0030] Furthermore, the present invention also provides the following advantages: it has an additional step for preparing HOCl solvent used in the deodorization device, which solves the problems of complex steps that require direct generation of HOCl solvent through an electrolytic water preparation device for recycling, as well as the problems of generating acid decomposition raw materials and the problem that the target substance for acid decomposition treatment is a substance causing malodor.

[0031] Furthermore, the present invention provides the following effect: in an acid decomposition tank through which inhaled odorous gases pass and come into contact with electrolyzed water, odor-causing substances are treated by impregnating ion exchange resin in electrolyzed water, and the electrolyzed water and ion exchange resin are heated by irradiating them with microwaves. Without dielectric loss due to the absorption of microwaves by the ion exchange resin itself as heat, only the adsorbed odor-causing substances are decomposed. The ion exchange resin can be used in a semi-permanent manner without additional regeneration or replacement of the adsorbed substances in the pores of the ion exchange resin.

[0032] Furthermore, the present invention also provides the following effects: using microwave dielectric heating to use SiC series microwave absorbing heating materials with high dielectric loss as heating fiber filters, thereby oxidizing and incinerating malodorous substances and residual pollutants, and maximizing the contact area by making the SiC fiber structure radially intersecting to form a high-density structure, while solving the problem of reduced odor input due to circulating gas pressure, thereby increasing the processing capacity per unit time.

[0033] Furthermore, the present invention also provides the following effects: dilute hydrochloric acid or sodium chloride is added to ordinary water in the electrolytic water generation section, and highly active electrolytic water with a pH range of 6 to 7 is generated by electrolysis. This water has the characteristics of being highly oxidizing but harmless to the environment. When it comes into contact with organic matter, it decomposes into water and a small amount of sodium, so it can be safely and effectively used for deodorization without causing environmental damage to the discharge of circulating water. Attached Figure Description

[0034] Figure 1 This is a structural diagram illustrating a microwave-based deodorization device according to an embodiment of the present invention.

[0035] Figure 2 The graph illustrates the ammonia removal test curve of a microwave-based deodorization device according to an embodiment of the present invention.

[0036] Figure 3 The graph illustrates the hydrogen sulfide removal test results of a microwave deodorization device according to an embodiment of the present invention. Detailed Implementation

[0037] Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

[0038] Figure 1 To illustrate the structural diagram of a microwave-based deodorization device according to an embodiment of the present invention, Figure 2 To illustrate the ammonia removal test curve of a microwave deodorization device according to an embodiment of the present invention, Figure 3 The graph illustrates the hydrogen sulfide removal test results of a microwave deodorization device according to an embodiment of the present invention.

[0039] like Figure 1 As shown, the microwave deodorization device of this embodiment includes an input unit 10, a first deodorization unit 20, a second deodorization unit 30, a first heating unit 40, a second heating unit 50, an atmospheric circulation unit 60, a drainage unit 70, a circulation pump unit 80, and an electrolytic water generation unit 90. It is a microwave deodorization device that uses microwaves to remove malodorous substances from odorous gases.

[0040] The input unit 10 (e.g., a blower) is an input unit that draws in and inputs odorous gases. It supplies and inputs substances that cause malodorous gases, such as ammonia (NH3), hydrogen sulfide (H2S), and triethylamine (C6H4O), generated in ordinary workplaces and livestock farms, through forced air supply via a blower or similar means. 15 Odors include nitrogen (N) and other volatile organic compounds (VOCs).

[0041] The input section 10 is composed of a multi-stage high-pressure air supply device located upstream of the first deodorization section 20 to transport odorous gas. It can be equipped with an air volume regulating valve or a manual exhaust device that can adjust the air volume and internal pressure according to the removal rate of odor-causing substances in the pipe or chamber of the first deodorization section 20. Alternatively, it can be composed of multiple devices that can use appropriate air volume and pressure according to the site environment.

[0042] The first deodorization unit 20 is located downstream of the input unit 10. It is a malodor removal unit that treats malodorous substances for the first time by electrolyzing water through an acid decomposition tank. It consists of an odor inhalation pipe 11 connected upstream and an acid decomposition tank through which the malodorous substances inhaled from the inhalation pipe 11 pass and come into contact with the electrolyzed water. The malodorous substances are passed through and treated by impregnating ion exchange resin in the electrolyzed water. Microwaves from the first heating unit 40 are irradiated onto the electrolyzed water and the ion exchange resin.

[0043] The first deodorization unit 20 utilizes the principle of microwave acid decomposition and is composed of a device that effectively oxidizes and decomposes odorous gases such as ammonia, hydrogen sulfide, triethylamine, and other volatile organic compounds generated in ordinary workplaces and livestock farms. In the sample pretreatment stage, highly active electrolyzed water, which can replace the dangerous strong acid solvents such as nitric acid (HNO3), hydrochloric acid (HCl), and sulfuric acid (H2SO4) used in microwave acid decomposition, is used as the best solvent to deal with odor.

[0044] In the process of acid decomposition by irradiating microwaves with highly active electrolyzed water as a solvent, in order to maximize the decomposition efficiency such as the capture and retention time of odor-causing substances, an ion exchange resin is impregnated in highly active electrolyzed water as an adsorbent material for odor-causing substances, and the device for irradiating microwaves constitutes the first heating part 40.

[0045] The ion exchange resin used in the first deodorization section 20 can effectively remove acidic, alkaline, and neutral ion salts, as well as fine dust, ammonia, or harmful substances containing amine groups smaller than 10μm. Depending on the ionization characteristics of the odor-causing substances, one or more of the following can be used, but not limited to: strong acidic cation exchange resin, strong basic anion exchange resin, weak acidic cation exchange resin, weak basic anion exchange resin, chelating resin, electron exchange resin, and amphoteric resin.

[0046] In the first deodorization unit 20, there is an inhalation pipe for odorous gas and a pipe or chamber through which the inhaled gas can come into contact with electrolyzed water. Electrolyzed water generated by electrolysis is circulated in the pipe or chamber. More than 90% of the ion exchange resin is impregnated in the electrolyzed water in the pipe or chamber, so that the odor-causing substances pass through the corresponding space. The volume of the pipe or chamber in the treatment process of the first deodorization unit 20 can be adjusted according to the input amount and pressure of the odorous gas.

[0047] When the ion exchange resin used in the first deodorization unit 20 is coated with a resin solution raw material having ion exchange groups that can respond to specific odor-causing substances at the odor-causing site, it has the following advantages: unlike existing ordinary deodorization systems, it is possible to construct odor response systems for different sites that can selectively react with odor-causing substances at the site to improve treatment efficiency.

[0048] Meanwhile, microwaves pass through without causing dielectric loss due to thermal absorption by the ion exchange resin itself, and only decompose the odor-causing substances adsorbed in the pores. Therefore, ion exchange resins can be used semi-permanently without the need for additional regeneration or replacement of the adsorbed substances in the pores.

[0049] Therefore, the tubes or chambers impregnated with ion exchange resins in water electrolysis can be made of aluminum or quartz tubes that do not generate microwave dielectric loss. Different materials with the same properties that ensure durability and heat resistance can also be used to increase the adsorption efficiency of odor-causing substances by reducing or increasing the pressure of the tubes or chambers and to improve the microwave water electrolysis efficiency with low energy, but this is not a limitation.

[0050] The first deodorization unit 20 has a pressure reducing valve and pump in its pipe or chamber that can reduce internal pressure, and is adjusted to an environment that can be contacted and oxidized even at low temperatures, thereby reducing energy costs.

[0051] The second deodorizing unit 30 is located downstream of the first deodorizing unit 20. It is a deodorizing unit that treats the odor for the second time through a heated fiber filter. A guide plate is provided at the odor inlet. As the input gas rotates inside the chamber, the heated fiber filter is arranged in a radial cross pattern to maximize the contact area. At the same time, the microwave irradiation of the second heating unit 50 is adjusted according to the internal temperature.

[0052] In the second deodorization section 30, the odorous gas from the tube or chamber impregnated with ion exchange resin is ionized through a microwave acid decomposition process and then undergoes a secondary deodorization process in this state.

[0053] The deodorization process of the second deodorization unit 30 involves oxidizing and incinerating the malodorous substances and residual pollutants that have been decomposed by passing through a tube or chamber impregnated with ion exchange resin using microwave dielectric heating. In this step, microwave-absorbing heating materials of the SiC series with high dielectric loss are used as heating fiber filters.

[0054] The malodorous substances that have undergone one decomposition in the first deodorization section 20 are treated by using a SiC series ceramic mesh heated to over 800°C by microwave irradiation as a heating fiber filter, thereby undergoing high-temperature oxidation.

[0055] That is, the odor-causing substances that have undergone microwave acid decomposition in the first deodorization section 20 are decomposed to the ionization level, which can maximize the high-temperature oxidation and incineration efficiency of the decomposed odor-causing substances in the second deodorization section 30. This can significantly reduce the energy input cost of existing contact high-temperature oxidation incineration devices such as TO, RTO, and CTO that use liquefied petroleum gas (LPG) and liquefied natural gas (LNG) combustion furnaces.

[0056] At the same time, by minimizing the generation of dust or ash from high-molecular-weight odor-causing substances during contact incineration, it not only prevents the generation of secondary pollutants but also minimizes the inconvenience of using deodorization systems for removing dust and ash. This solves problems such as the size of gas supply pipes, reduced equipment performance, and maintenance issues.

[0057] The SiC series ceramic mesh, used as a heating fiber filter, can be applied in plate or powder form. When SiC fiber is used as a filter, the pressure load of the odorous gas supplied through the pipe or chamber of the second deodorization section 30 can be minimized and the contact area can be increased.

[0058] SiC fibers can solve the problem of high-temperature durability of structural connection and fixing devices that adhere to related heating materials and deodorizing devices when using sheet or powder forms.

[0059] The deodorization process of the second deodorization unit 30 adopts a design that takes into account the air volume, residence time and contact area, which are the most important factors in all high-temperature contact oxidation methods. After the treatment process of the first deodorization unit 20, a guide plate is set at the inlet of the odor gas. As the gas rotates inside the pipe or chamber, the residence time is adjusted, and the contact temperature is increased by increasing the gas flow rate.

[0060] By arranging SiC fiber structures in a radial cross pattern to achieve high density, the contact area is maximized while addressing the issue of reduced odor input due to circulating gas pressure, thereby increasing the processing capacity per unit time.

[0061] To create a high-temperature atmosphere, the tubes or chambers of the second deodorization unit 30 are constructed using a structure that allows for methods to reduce pressure or increase the flow rate of odorous gases. An automatic control device is installed that can adjust the amount of microwave irradiation according to the internal temperature, thereby reducing energy costs.

[0062] The second deodorization section 30 has a pressure reducing valve and pump in its pipe or chamber that can reduce internal pressure, thereby reducing energy costs by adjusting to an environment that can achieve contact oxidation even at low temperatures.

[0063] The first heating element 40 is disposed around the outer perimeter of the first deodorizing element 20. It is a first heating unit that heats the first deodorizing element 20 by microwaves and is composed of a microwave oscillator that can irradiate microwaves to the outside of a tube or chamber through which malodorous substances pass.

[0064] The first heating element 40 irradiates microwaves into the highly active electrolyzed water and ion exchange resin inside the chamber through a waveguide tube. The odor-causing substances that come into contact with the solvent and pass through or are adsorbed in the micropores of the ion exchange resin are targeted. In a short time, the odor-causing substances are ionized and decomposed by the high polarity and ionization rate of the highly active electrolyzed water.

[0065] The microwave irradiation of the first heating element 40 can apply a microwave power of 500W to 1000W, preferably 800W. Furthermore, the microwave irradiation can last for 30 seconds to 600 seconds, preferably 300 seconds to 600 seconds.

[0066] When microwaves are applied in this way, the solvent boils, oxidizing and decomposing the odor-causing substances. The boiling temperature can range from 30°C to 100°C, and the temperature can be set according to the odor-causing substances.

[0067] The second heating element 50 is disposed around the outer perimeter of the second deodorizing element 30. It is a second heating unit that heats the second deodorizing element 30 by microwave heating, and the odor is brought into contact with high temperature by heating the SiC fiber structure that serves as the heating fiber filter of the second deodorizing element 30.

[0068] The microwave electromagnetic wave using a non-metallic heating element composition capable of absorbing microwaves to generate heat to high temperatures has a wavelength of 1 mm or more and a frequency of 300 MHz or more, and the electromagnetic wave capable of heating through dielectric loss has a frequency domain of 3 MHz or more.

[0069] The frequency domain used in industry is 2.4 GHz. The alternating electromagnetic field of microwaves not only has the interaction between dipoles in matter, but also generates friction through vibration or rotation due to the interaction of charged particles in solids, which heats up at a rate of about 130°C in a short time and releases heat at a high temperature of about 400°C. While rapidly heating up, it is converted into high-temperature heat, and has the characteristic of converting microwave electrical energy into heat energy for use.

[0070] In order to commercialize microwave heating elements with the aforementioned characteristics by reducing the electrical energy required, since continuous microwave irradiation is required to convert and maintain high-temperature heat energy, there is a need for a technology that can maximize the temperature holding time of rising high heat energy even if the irradiation time of microwaves as electrical energy is shortened.

[0071] The shorter the microwave irradiation time, the greater the reduction in energy input costs, ensuring the economic efficiency of utilizing high-temperature thermal energy at a lower energy cost.

[0072] The atmospheric circulation unit 60 is located on the upstream side of the second deodorization unit 30. It is a supply unit that supplies atmospheric air to the second deodorization unit 30 for circulation. It is formed by a multi-stage high-pressure air supply device located upstream of the second deodorization unit 30, which transfers atmospheric air and odor to circulate it.

[0073] In the atmospheric circulation unit 60, an air volume regulating valve or a manual exhaust device can be installed to adjust the air volume and internal pressure according to the removal speed of odor-causing substances in the pipe or chamber of the second deodorization unit 30. Alternatively, it can be composed of multiple devices that can adopt appropriate air volume and pressure according to the site environment.

[0074] The drainage section 70 is located on the other side downstream of the first deodorization section 20. It is a drainage unit that allows the circulating water discharged from the first deodorization section 20 to flow to the outside. It is connected to the first deodorization section 20 so that the odor-causing substances are adsorbed and decomposed for a specified time, and then the electrolyzed water discharged from the first deodorization section 20 is discharged to the outside through the circulation drain pipe 71.

[0075] In the first deodorization section 20, a structure is made in which ion exchange resin is impregnated in the electrolyzed water to supply and circulate the newly generated electrolyzed water from the water tank of the electrolyzed water generation section 90. In this case, the valve of the drainage section 70 connected to the circulation drain pipe 71 is opened to automatically discharge the contaminated electrolyzed water.

[0076] The circulation pump unit 80 is located on the other side downstream of the first deodorization unit 20 and on the other side downstream of the drainage unit 70. It is a circulation pump unit that circulates the circulating water discharged from the first deodorization unit 20. When the adsorption and decomposition of odor-causing substances are achieved by electrolyzing water, the circulating water discharged from the first deodorization unit 20 is pumped out to circulate it, so as to supply the electrolyzed water generated in the electrolyzed water generation unit 90 to circulate it.

[0077] The electrolyzed water generating unit 90 is located on the upstream side of the first deodorization unit 20. It is a supply unit for supplying electrolyzed water to the first deodorization unit 20. Dilute hydrochloric acid or sodium chloride is added to ordinary water, and highly active electrolyzed water with a pH range of 6 to 7 is generated by electrolysis and supplied through the supply pipe 91.

[0078] The strong acid solvents used in microwave acid decomposition pose operational hazards and cause environmental pollution when recycled. However, when electrolyzing ordinary water by adding dilute hydrochloric acid or sodium chloride, the strong oxidizing properties of the electrolyzed water can achieve the same acid treatment effect as strong acid solvents.

[0079] As described above, the highly active electrolyzed water with a pH range of 6 to 7 generated in the electrolyzed water generation unit 90 has the characteristic of being strong oxidizing but harmless to humans or the environment. When it comes into contact with organic matter, it decomposes into water and a small amount of sodium, so it can be safely and effectively used for deodorization without causing environmental pollution to the discharge of circulating water.

[0080] Specifically, the Cl ions that make up the highly active electrolyzed water generated by electrolysis exist in three representative states depending on the pH environment: hypochlorite ion (OCl) when pH > 7.5, hypochlorous acid (HOCl) when pH < 3.5 < pH < 7.5, and chlorine (Cl) when pH < 3.5.

[0081] Among them, the oxidizing power from high to low is HOCl > Cl > OCl. The electrolyzed water impregnated with ion exchange resin is composed of HOCl solvent. HOCl is a substance in which one hydrogen (H) in a water molecule (HOH) is replaced by chlorine (Cl). The oxidation number of the chlorine atom in the molecule is +1. + It functions through strong electrophilic species, Cl +It selectively acts on high electron density binding sites such as C=C, CN, and CN (including peptide bonds), while Cl... + Two electrons are taken from other substances (2e - It originates from the body and transforms into Cl, through which it decomposes the odor-causing substances with high oxidizing properties.

[0082] In particular, HOCl is capable of removing both ammonia and hydrogen sulfide, which are representative organic odor-causing substances, while the chemicals used in ordinary wet deodorization devices can only remove specific odor-causing substances from ammonia and hydrogen sulfide. Moreover, the chemicals put into wet deodorization devices need to be replaced periodically, which is a major reason for increasing the operator cost of deodorization devices.

[0083] The chemical formula for ammonia removal using HOCl solution is shown in Chemical Formula 1 below. The gas concentration curves over time during the ammonia removal experiment are shown below. Figure 2 The curves shown are as follows: The gas concentration curves over time during the hydrogen sulfide test are as follows... Figure 3 The curve is shown in the figure.

[0084] Chemical Formula 1

[0085] NH3 + HOCl → NH2Cl + H2O

[0086] Therefore, the microwave deodorization device of the present invention is composed of a microwave oxidation device, which utilizes the principle of heating substances by generating dipole moments and ion conduction of polar molecules or ions in the microwave region. It is a device that applies the following principle: when microwaves are irradiated onto the target substance and the acid solution, the target substance is oxidized by the acid, and the molecular bonds of the substance are broken by the rapid vibration and collision of polar components, thereby decomposing the target substance into an aqueous solution in an ionic state.

[0087] Microwaves are a type of electromagnetic energy, consisting of alternating current and magnetic fields or wavelengths that move at the speed of light (approximately 300,000 km / sec). The frequency of microwaves ranges from 300 MHz to 300,000 MHz, and most microwave devices used in heating materials have a microwave frequency of 2450 MHz.

[0088] The microwave deodorization device of this invention, when irradiated with microwaves using a principle similar to that used in microwave acid decomposition for experimental sample analysis, achieves a rapid temperature rise caused by friction between substances through vibration at 4 billion times per second. Microwaves can achieve higher extraction and decomposition efficiency for solvents with higher polarity or ionization rate.

[0089] Furthermore, the microwave deodorization device of the present invention is a deodorization system in which an acid solvent is used as a highly active water electrolyzer to separate malodorous substances in a large volume of odorous gas. At the same time, a heating material that absorbs microwaves and has high dielectric loss is used, so that the malodorous substances that were decomposed by microwave acid in the water electrolysis oxidation device in the previous stage can be removed in the later stage by high-temperature contact oxidation.

[0090] Furthermore, the additional step of preparing the HOCl solvent used in the microwave-based deodorization device of the present invention involves a complex process of directly generating the HOCl solvent through an electrolytic water preparation device and circulating it. From the perspective of solving the problem of producing acid decomposition raw materials and acid decomposition treatment target substances being malodorous substances, there is a difference.

[0091] The odorous gas treated by the first deodorization section 20 and the second deodorization section 30 above can effectively remove both organic and volatile organic compounds with low energy cost. The gas after the removal of odorous substances through the relevant steps is treated to be discharged into the atmosphere at a level that meets atmospheric emission standards. Alternatively, if odorous substances are generated in a dryer, pyrolysis furnace, or other device that generates odorous substances, the device can be configured to recycle the gas without discharging it into the atmosphere.

[0092] As described above, according to the present invention, the following effects are provided: using an acid solvent as a highly active water electrolyzer to separate malodorous substances from a large volume of odorous gas; and using a heating material with high dielectric loss due to microwave absorption, thereby removing the malodorous substances decomposed by microwave acid in the water electrolysis oxidation device in the previous stage by high-temperature contact oxidation in the later stage.

[0093] Furthermore, the present invention provides the following advantages: it has an additional step for preparing HOCl solvent used in the deodorization device, which solves the problems of complex steps that require direct generation of HOCl solvent through an electrolytic water preparation device for recycling, as well as the problems of generating acid decomposition raw materials and the acid decomposition treatment of malodorous substances.

[0094] Furthermore, the present invention provides the following effect: in an acid decomposition tank through which inhaled odorous gases pass and come into contact with electrolyzed water, odor-causing substances are treated by impregnating ion exchange resin in electrolyzed water, and the electrolyzed water and ion exchange resin are heated by irradiating them with microwaves. Thus, without dielectric loss that would cause the microwaves to be absorbed and reacted by the ion exchange resin itself in a thermal manner, only the adsorbed odor-causing substances are decomposed. Therefore, ion exchange resin can be used in a semi-permanent manner without requiring additional regeneration or replacement of the pore-adsorbed substances.

[0095] Furthermore, the present invention also provides the following effects: by using microwave dielectric heating, SiC series microwave absorbing heating materials with high dielectric loss are used as heating fiber filters. In this way, odor-causing substances and residual pollutants are oxidized and incinerated. By making the SiC fiber structure radially intersecting at high density, the contact area is maximized. At the same time, the problem of the odor input being reduced due to the pressure of the circulating gas is solved, thereby increasing the processing capacity per unit time.

[0096] Furthermore, the present invention also provides the following effect: by adding dilute hydrochloric acid or sodium chloride to ordinary water in the water electrolysis generation section, highly active electrolyzed water with a pH range of 6 to 7 is generated through electrolysis. This water has the characteristics of being highly oxidizing but harmless to the environment. When it comes into contact with organic matter, it decomposes into water and a small amount of sodium, thus it can be safely and effectively used for deodorization without causing environmental pollution to the discharge of circulating water.

[0097] The present invention described above can be implemented in many other forms without departing from its technical concept or main features. Therefore, the embodiments described are merely illustrative and should not be construed as limiting the present invention.

[0098] Explanation of reference numerals in the attached figures

[0099] 10: Input Section 20: First Deodorization Section

[0100] 30: Second deodorizing section; 40: First heating section

[0101] 50: Second heating section; 60: Atmospheric circulation section

[0102] 70: Drainage section; 80: Circulation pump section

[0103] 90: Electrolyzed Water Generation Section

Claims

1. A deodorizing device utilizing microwaves, characterized in that, include: Input section (10) absorbs and inputs odorous gases; The first deodorization unit (20) is located downstream of the input unit (10) and treats the odor for the first time by electrolyzing water in the acid decomposition tank. The second deodorization section (30) is located downstream of the first deodorization section (20) and treats the odor a second time through a heated fiber filter. The first heating element (40) is disposed around the outer contour of the first deodorizing element (20) and the first deodorizing element (20) is heated by microwave. The second heating element (50) is disposed around the outer contour of the second deodorizing element (30) and the second deodorizing element (30) is heated by microwave. An electrolyzed water generating unit (90) is provided on the upstream side of the first deodorizing unit (20) and supplies electrolyzed water to the first deodorizing unit (20); as well as An atmospheric circulation unit (60) is located upstream of the second deodorizing unit (30), supplying air to the second deodorizing unit (30) and circulating the air and odor together. The first deodorizing unit (20) consists of an odor-inhaling pipe and an acid decomposition tank that allows the inhaled odor to pass through and come into contact with electrolyzed water. Ion exchange resin is impregnated in the electrolyzed water to allow the odor-causing substances to pass through and be treated. Microwaves are irradiated onto the electrolyzed water and the ion exchange resin by the first heating unit (40). The ion exchange resin is made by coating a resin solution raw material having ion exchange groups capable of dealing with odor-causing substances. The electrolyzed water generating unit (90) adds dilute hydrochloric acid or sodium chloride to ordinary water and generates highly active electrolyzed water with a pH range of 6 to 7 through electrolysis. The electrolyzed water impregnated with the ion exchange resin is composed of HOCl solvent.

2. The microwave deodorization device according to claim 1, characterized in that, Also includes: A drainage section (70) is provided on the downstream side of the first deodorization section (20) to discharge circulating water discharged from the first deodorization section (20) to the outside; and A circulating pump unit (80) is provided on the other side downstream of the first deodorizing unit (20) and on the other side downstream of the drain unit (70) to circulate the circulating water discharged from the first deodorizing unit (20).

3. The microwave deodorization device according to claim 1, characterized in that, The second deodorizing unit (30) is provided with a guide plate at the odor inlet. As the input gas rotates inside the chamber, the heating fiber filter is arranged in a radial cross pattern to maximize the contact area. The amount of microwave irradiation of the second heating unit (50) is adjusted according to the internal temperature.

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