Concentrated regenerative thermal oxidizer having electric heater applied thereto

Abstract

According to the present invention, the concentrated regenerative thermal oxidizer having an electric heater applied thereto comprises: a concentration unit in which adsorption, desorption, and cooling / purging are simultaneously performed in one device through rotation to effectively process various kinds of volatile organic compounds (VOCs); and a thermal oxidation unit replacing a combustion burner using fossil fuel with an electric heater to respond to carbon neutral and converting processes with one switching damper, thereby maximizing processing efficiency.

Description

Concentrated regenerative combustion oxidation device with electric heater

[0001] The present invention relates to a concentrated regenerative combustion oxidation device to which an electric heater is applied, and more particularly, to a concentrated regenerative combustion oxidation device comprising a concentrated section in which adsorption, desorption, and cooling / purging are simultaneously performed in one device through rotation in order to effectively treat various types of volatile organic compounds (VOCs), and a combustion oxidation section in which a combustion burner using fossil fuels is replaced with an electric heater to cope with carbon neutrality and the process is converted into a single switching damper.

[0002] In addition, it is disclosed that the present invention is the result of a national research support project with the business name of “Energy Demand Management Core Technology Development Project” and the project name of “Development of Electrification and High-Efficiency Technology for Air Environment Facilities.”

[0003] -Other task details

[0004] (Unique number: 20222020900031, Sub-project number: 2022202090003C, Principal Investigator: Shin Dong-jun, Name of specialized organization: Korea Institute of Energy Technology Evaluation and Planning, Name of host organization: Daeyang E&I Co., Ltd., Project period: 2024-01-01~2024-12-31)

[0005] Volatile organic compounds (VOCs), along with heavy metals, are classified as specific air pollutants. Emitted by large and small industrial complexes, from processes such as printing and painting, chemical production, and biomass carbonization, VOCs combine with fine dust and nitrogen oxides in the atmosphere to form ozone, a major cause of smog. While VOCs can exist in liquid or solid form at room temperature and pressure, they also readily evaporate and exist in the atmosphere as gases.

[0006] Most substances that make up VOCs produce irritating and unpleasant odors even at low concentrations. They are also classified as carcinogens, causing nervous system disorders and other health problems upon skin contact or respiratory inhalation. Emphasizing this aspect, they are also called HAPs (Hazardous Air Pollutants). In the United States, 189 substances are regulated as VOCs, while in Korea, 48 substances, including toluene, the most commonly used, are designated as such.

[0007] Methods for treating volatile organic compounds include combustion (thermal oxidation), biological treatment, adsorption, catalytic oxidation, and concentrated oxidation. Among the methods for treating volatile organic compounds, the regenerative thermal oxidizer (RTO) is an oxidation method that oxidizes volatile organic compounds at a high temperature by maintaining the oxidation temperature above 800℃. Generally, it can be operated without additional fuel supply when the temperature increase due to the oxidation calorific value of volatile organic compounds in the waste gas is 40 to 80℃ per cubic meter of gas. The regenerative thermal oxidizer has the advantage of reducing fuel costs associated with incineration of volatile organic compounds and recycling the waste heat generated during the oxidation of volatile organic compounds, so much research and development is being conducted both domestically and internationally.

[0008] Korean Patent No. 10-1250940 discloses a system for treating odors and volatile organic compounds. It concentrates VOCs using a solid adsorbent and oxidizes them. However, the use of a solid adsorbent makes efficient, continuous adsorption and desorption processes difficult, and it also hinders the adsorption of low-concentration VOCs.

[0009] Therefore, for efficient volatile organic compound treatment, it is necessary to develop a technology for treating volatile organic compounds that can adsorb and desorb high concentrations of polluted gas even at low concentrations and consumes less energy.

[0010] [Prior Art Literature]

[0011] Patent Document: Republic of Korea Patent No. 10-1250940 (March 29, 2013)

[0012] The present invention has been devised to solve the above problems, and specifically, it aims to provide a concentrated heat storage combustion oxidation device having a concentration unit and a combustion oxidation unit, wherein the concentration unit rotates to simultaneously perform adsorption, desorption, and cooling / purging of a substance to be treated in one device, thereby reducing the amount of energy consumed for adsorption and desorption of the substance to be treated, and at the same time, by replacing the combustion burner in the combustion oxidation unit with an electric heater to electrify fossil energy.

[0013] The present invention relates to a concentrated regenerative combustion oxidation device to which an electric heater is applied.

[0014] One aspect of the present invention relates to a concentrating regenerative combustion oxidation device that adsorbs / desorbs various types of volatile organic compounds (VOCs) and then oxidizes them by combustion, the device comprising: a concentrating unit that passes the treating fluid through the device to adsorb a substance to be treated in the treating fluid and desorb the adsorbed substance to be treated; and a combustion oxidation unit that processes the desorbed substance to be treated and transfers the generated heat to the concentrating unit to be used as a desorption heat source for the substance to be treated adsorbed in the concentrating unit; wherein the concentrating unit rotates so that adsorption, desorption, and purging of the substance to be treated are simultaneously performed in one device, and the combustion oxidation unit is characterized in that an electric heater is applied thereto to replace fossil energy.

[0015] In the present invention, the concentrator may include a concentrator that includes zeolite, a hydrophobic, non-combustible material, as an adsorbent of a rotor, and is provided in a cylindrical shape, and is composed of an adsorption region that adsorbs a substance to be treated in a certain area based on a circular cross-section, a desorption region that desorbs the adsorbed substance to be treated, and a purge region, and is physically completely separated so that each region does not come into contact with each other.

[0016] In addition, the above concentration unit may further include a distributor provided inside the housing, which distributes a portion of the treatment fluid flowing into the housing to an adsorption area and a portion to a purge area.

[0017] In the present invention, the combustion oxidation unit may include a combustion oxidation unit housing having a space therein to incinerate the substance to be treated and generate a clean fluid, and having a partition portion protruding upward on the inner surface of the lower part of the housing to control the flow of the fluid; a switching damper through which the substance to be treated is introduced from the concentration unit and which changes a path for introducing the substance to be treated into the housing and a path for introducing a carrier fluid generated in the housing through operation; an electric heater provided on an upper surface of the housing and supplying thermal energy to the housing; a heat accumulator provided in a space between the inner surface of the lower part of the housing and the combustion oxidation chamber; and a buffer tank provided to be in communication with the switching damper and storing the carrier fluid introduced through the switching damper.

[0018] At this time, the switching damper may include: a damper housing; a first port provided in the damper housing through which a material to be treated flows from the concentration unit; a second port and a third port provided in the damper housing through which a material to be treated is transported from the damper housing to the combustion oxidation unit housing or a carrier fluid flows from the combustion oxidation unit housing to the damper housing through a flow path; a fourth port provided in the damper housing through which a carrier fluid is transported from the damper housing to a buffer tank or a stack; and a switching unit provided inside the damper housing and which operates to connect the first port and the second port and the third port and the fourth port, or to connect the first port and the third port and the second port and the fourth port.

[0019] In addition, the switching unit may include a dividing panel provided inside the damper housing to divide the internal space of the damper housing into a first space to a fourth space; a communication hole formed to penetrate one side and the other side of the dividing panel to communicate the spaces divided by the dividing panel; a first plug located in the second space to selectively close the communication hole connecting the first space and the second space through a rotational movement, or to close the communication hole connecting the second space and the fourth space; and a second plug located in the third space to selectively close the communication hole connecting the first space and the third space through a rotational movement, or to close the communication hole connecting the third space and the fourth space.

[0020] Here, the above-mentioned concentration unit may further include an auxiliary heater that transfers auxiliary heat to the heating fluid transferred to the above-mentioned concentration unit.

[0021] The concentrated regenerative combustion oxidation device with an electric heater according to the present invention simplifies the adsorption and desorption process by simultaneously performing adsorption, desorption, and cooling / purging in one device through rotation to effectively treat various types of volatile organic compounds (VOCs), and maximizes the treatment efficiency by replacing a combustion burner using fossil fuels with an electric heater and converting the process to a single switching damper to respond to carbon neutrality.

[0022] Figure 1 schematically illustrates a concentrated regenerative combustion oxidation device to which an electric heater according to the present invention is applied.

[0023] Figure 2 is a side view (a) and a plan view (b) of a concentration unit according to one embodiment of the present invention.

[0024] FIG. 3 illustrates the left side (a) and the right side (b) of a concentrator in which an adsorption region, a desorption region, and a purge region are formed by dividing a partition wall and a side wall according to one embodiment of the present invention, the process of treating a fluid to be treated during a process flow (c), and the process of desorption and purge fluid (d).

[0025] FIG. 4 is a cross-sectional view showing the positions of the supply pipe and the outlet pipe of each fluid in the concentration unit according to one embodiment of the present invention.

[0026] Figure 5 is a cross-sectional view of a combustion oxidation unit according to one embodiment of the present invention.

[0027] Figures 6 to 9 illustrate the flow of fluid according to the operation of a switching damper according to one embodiment of the present invention.

[0028] Figure 10 is a perspective view of a buffer tank according to one embodiment of the present invention.

[0029] Fig. 11 is a cross-sectional view of a buffer tank according to one embodiment of the present invention.

[0030] The following specific examples will be used to describe in detail a concentrated regenerative combustion oxidizer employing an electric heater according to the present invention. The specific examples presented below are provided as examples to ensure that those skilled in the art can sufficiently understand the spirit of the present invention.

[0031] Therefore, the present invention is not limited to the specific examples presented below and may be embodied in other forms. The specific examples presented below are only described to clarify the idea of ​​the present invention, and the present invention is not limited thereto.

[0032] In this case, if there is no other definition in the technical and scientific terms used, they have the meaning commonly understood by a person of ordinary skill in the technical field to which this invention belongs, and in the following description, descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted.

[0033] Additionally, the singular forms used in the specification and the appended claims are intended to include the plural forms as well, unless the context clearly dictates otherwise.

[0034] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the present invention. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but another component may also be "connected," "coupled," or "connected" between each component.

[0035] In the present invention, the term 'treatment fluid' refers to a fluid before passing through the concentration section described below, and is a gas or liquid containing a volatile organic compound, which is a substance to be treated.

[0036] In addition, in the present invention, the term 'heating fluid' refers to a gas in the form of direct heat exchange between the purge gas of the concentration section and the combustion gas of the combustion oxidation section to desorb the target substance adsorbed through the concentration section.

[0037] Additionally, in the present invention, the term 'carrier fluid' means a fluid containing a substance to be treated after passing through a concentrator and desorbing it.

[0038]

[0039] In a concentrated regenerative combustion oxidation device using an electric heater according to the present invention, the target material may include a commonly used organic solvent. The organic solvents are mostly volatile organic compounds, which are mainly used in the process of processing polymer resins. Examples of these components include dichloromethane (CH2Cl2), N-methyl pyrrolidone (C5H9NO), acetaldehyde (C2H4O), acetylene (C2H2), acrolein (C3H4O), benzene (C6H6), 1,3-butadiene (C4H6), butane (C4H). 10 ), 1-butene (1-Butene, C4H8), 2-butene (2-Butene, C4H8), cyclohexane (C6H 12 ), ethylene (C2H4), formaldehyde (CH2O), n-hexane (C6H 14 ), Isopropyl Alcohol (C 3 H8O), methanol (CH3OH), methyl ethyl ketone (Methyl Ethyl Ketone, C4H8O), MTBE (Methyl Tertiary Butyl Ether, C5H 12O), Propylene (C3H6), Propylene Oxide (C3H6O), Acetic Acid (C2H4O2), Ethylbenzene (C8H 10 ), toluene (Toluene, C7H8), xylene (including o-, m-, p-) (Xylene, C8H 10 ), and styrene (C8H8C8H8), and there are also hydrocarbon compounds that are harmful to the human body but have low boiling points and evaporate easily.

[0040] If the concentrated regenerative combustion oxidation device to which the electric heater according to the present invention is applied is described in more detail through the drawings, the system may include a concentration unit (100) that passes the treatment fluid through the treatment fluid to adsorb the treatment target substance in the treatment fluid, desorbs the adsorbed treatment target substance, and filters the treatment fluid into a clean fluid; and a combustion oxidation unit (200) that introduces the desorbed treatment target substance to process it and transfers the heat generated to the concentration unit to be used as a desorption heat source for the treatment target substance.

[0041] In the present invention, the concentrator (100) is configured to pass the treatment fluid through the treatment fluid to adsorb the treatment target substance in the treatment fluid, and to desorb the adsorbed treatment target substance to filter the treatment fluid into a clean fluid. Specifically, as shown in FIGS. 2 and 3, the concentrator may include a concentrator (110) having a cylindrical shape, and having a circular cross-section, and divided into an adsorption region for adsorbing the treatment target substance in a predetermined region, a desorption region for desorbing the adsorbed treatment target substance, and a purge region, and operating by rotation so that each region moves to a predetermined position; a housing (120 and 130) for introducing the treatment fluid, discharging the clean fluid from which the treatment target substance has been separated, introducing a heating fluid to separate the treatment target substance adsorbed in the concentration region, discharging a carrier fluid containing the desorbed treatment target substance through the heating fluid, and introducing and discharging a purge fluid for cooling the concentration region; and a distributor (122) provided inside the housing for distributing a portion of the treatment fluid introduced into the housing to supply the portion to the adsorption region and a portion to the purge region.

[0042] That is, by providing a distributor inside the housing as described above, some of the treatment fluid flowing into the housing can be supplied to the adsorption area to remove the adsorbed substance and discharged as clean fluid, and some can be supplied to the purge area to be converted into purge fluid that cools the concentrator. In addition, the purge fluid that has passed through the purge area of ​​the concentrator can be mixed with the heating fluid described below and supplied back to the concentrator.

[0043] In the present invention, the concentration section is divided into an adsorption region for adsorbing the treatment target substance in the treatment fluid described above, a desorption region for desorbing the adsorbed treatment target substance, and a purge region, and each region can move to a certain position through rotation.

[0044] At this time, the above adsorption region (A), desorption region (B), and purge region (C) can be arranged in the order of adsorption region-desorption region-purge region-adsorption region-desorption region-purge region... based on the rotation direction as shown in Fig. 3, and each region is physically completely separated through a partition wall as described later.

[0045] In addition, the housing (120 and 130) may be provided with a supply pipe and a discharge pipe that supply each fluid into the housing or discharge it out of the housing so that the processes of introducing a treatment fluid as described above, discharging a clean fluid from which the treatment target substance has been separated, introducing a heating fluid to separate the treatment target substance adsorbed in the concentration unit, discharging a carrier fluid containing the treatment target substance desorbed through the heating fluid, and introducing and discharging a purge fluid that cools the concentration unit can be performed simultaneously.

[0046] At this time, the fluid supply unit and fluid discharge unit that supply each fluid are provided with supply pipes (121, 135) that supply the treatment fluid and the heating fluid, respectively, and discharge pipes (132, 127, 134) that discharge the clean fluid, the carrier fluid, and the purge fluid to the outside of the concentrator, and each pipe may further be provided with an expansion unit (123, 125, 126, 131, 133, 136) that expands the end of the pipe, i.e., the end of the pipe facing the concentrator, to fit the area of ​​each region to facilitate the supply or discharge of each fluid.

[0047] The above expansion unit may be provided to cover part or all of each divided area of ​​the concentrator as shown in FIG. 4, and when each area of ​​the concentrator is located in each expansion unit, the role of the area of ​​the concentrator can be changed according to the fluid supplied or discharged from each expansion unit.

[0048] For example, with reference to FIGS. 3 and 4, if one area of ​​the concentration section faces the expansion section (123) of the treatment fluid supply pipe (121), the area of ​​the concentration section facing this area functions as an adsorption area. Accordingly, the area adsorbs the substance to be treated in the treatment fluid as the treatment fluid supplied from the treatment fluid supply pipe passes through the area. In addition, with reference to the area of ​​the concentration section facing this area, the expansion section (131) of the clean fluid discharge pipe (132) is located on the opposite side of the expansion section of the treatment fluid supply pipe. That is, the treatment fluid from which the substance to be treated has been removed by passing through the area of ​​the concentration section facing this area can be discharged out of the housing through the expansion section of the clean fluid discharge pipe.

[0049] And as the concentrator rotates, when the area of ​​the facing concentration section faces the expansion section (136) of the heating fluid supply pipe (135) at the expansion section (123) of the treatment fluid supply pipe (121), the area is converted from an adsorption area to a desorption area. Therefore, the area of ​​the facing concentration section is desorbed from the treatment target substance adsorbed in the area as the heating fluid supplied from the heating fluid supply pipe passes through the area. In addition, at this time, the expansion section (126) of the carrier fluid outlet pipe (127) is located on the opposite side of the expansion section of the heating fluid supply pipe based on the area. Therefore, in the area, the adsorbed treatment target substance is removed by passing the heating fluid, and the carrier fluid containing the desorbed treatment target substance is moved to the combustion oxidation section through the expansion section of the carrier fluid outlet pipe.

[0050] Next, as the above-mentioned concentration unit rotates, when the above-mentioned area faces the expansion portion (125) of the purge fluid supply pipe (124) at the expansion portion (136) of the heating fluid supply pipe (135), the above-mentioned area changes from a desorption area to a purge area. Therefore, the above-mentioned area is distributed through the distributor, and as the purge fluid supplied from the purge fluid supply pipe passes through the area, the concentrator of the area is cooled, thereby further increasing the adsorption efficiency of the target substance. In addition, at this time, the expansion portion (133) of the purge fluid outlet pipe (134) is located on the opposite side of the expansion portion of the purge fluid supply pipe with respect to the above-mentioned area. Therefore, the purge fluid passing through the above-mentioned area is sent to the heat exchanger, which will be described later, through the expansion portion of the outlet pipe, and moves to the desorption area of ​​the concentration unit through the heat exchanger (160).

[0051] That is, the above-mentioned concentration section does not always have fixed adsorption zones, desorption zones, and purge zones, and each zone continuously changes according to the expansion of the supply pipe or outlet pipe of the facing fluid. However, each zone sequentially changes in the order of adsorption zone-desorption zone-purge zone, and the zone that has completed the purge returns to the adsorption zone and repeats the cycle in the order of adsorption-desorption-purge...

[0052] As described above, the above concentrator has an adsorption area, a desorption area, and a purge area determined according to the surface facing the expansion portion of each supply pipe and discharge pipe, and each area is physically separated by a partition wall.

[0053] If the operation and adsorption, desorption, and purge movements of the above-mentioned concentrator are explained based on the drawing, as shown in FIG. 3, when the adsorption region, desorption region, and purge region of the concentrator are conceptually divided by a partition wall, the concentrator moves slowly without stopping, and the operation speed and area of ​​each of the adsorption region, desorption region, and purge region are determined according to the fluid supply or fluid discharge speed of each fluid supply pipe and discharge pipe, and the area of ​​the expansion section.

[0054] To explain this in more detail based on the flow of fluid, in the adsorption area, the treatment fluid is supplied from the treatment fluid supply pipe, and after the target substance is adsorbed, the clean fluid is discharged through the clean fluid discharge pipe. In other words, in the above adsorption area, the fluid flows from left to right.

[0055] Separately, in the desorption area, heating fluid is supplied from the heating fluid supply pipe, and when the heating fluid passes through the desorption area and desorbs the substance to be treated, the carrier fluid mixed with the substance to be treated is discharged from the housing through the carrier fluid discharge pipe. That is, in the above-mentioned adsorption area, the fluid flows from right to left.

[0056] In addition, in the purge region, purge fluid is supplied from the purge fluid supply pipe, the purge fluid passes through the purge region, cools, and absorbs heat, and the purge fluid, whose temperature has increased, is discharged from the housing through the purge fluid outlet pipe. That is, in the above adsorption region, the fluid flows from left to right.

[0057] The above concentrator is a material having pores formed on the surface or inside as described above, and is not limited to any type of material as long as it can adsorb the target substance. For example, the adsorption element may include activated carbon, activated carbon fiber, zeolite, silica, etc., and these may be in the form of granules, powder, honeycomb, fiber, etc.

[0058] More preferably, the above adsorption element is a hydrophobic zeolite. Since the hydrophobic zeolite can selectively adsorb only volatile organic compounds in competitive adsorption with water, it has superior adsorption / desorption efficiency compared to conventional general zeolites and has the advantage of rapid regeneration.

[0059] Specifically, the hydrophobic zeolite described above is preferably a mixture of at least one of the structures of MFI (HZSM-5), FAU (HY), Mordenite (HMOR), or Beta (H-Beta).

[0060] Additionally, in the present invention, the concentrating unit may further include an auxiliary heater (not shown) that transfers auxiliary heat to the heating fluid transferred to the concentrating unit.

[0061] The auxiliary heater operates particularly immediately after the oxidation device is started, as the combustion oxidation unit cannot generate enough heat to transfer to the heating fluid since the substance to be treated has not yet been treated. Therefore, immediately after the oxidation device is started, the fluid transferred to the concentrator is heated in place of the combustion oxidation unit, thereby desorbing the substance to be treated adsorbed in the concentrator.

[0062] The above auxiliary heater is not limited to a specific location, and is preferably located between the combustion oxidation section (200) and the concentration section (100) in the heating fluid path as shown in Fig. 1.

[0063] The above auxiliary heater is not limited in type or form. For example, it may generate heat by burning fuel, like the electric heater described below. Alternatively, it may wrap the outer surface of the passage with a coil and generate heat in the coil to heat the fluid passing through the passage.

[0064] The above direct heat exchanger (160) mixes the purge fluid and the heating fluid as described above and controls the temperature of the heating fluid supplied to the concentration unit to around 200°C. Specifically, the temperature of the heating fluid delivered from the combustion oxidation unit, which will be described later, is 700 to 800°C, which is too high to be directly applied to the concentration unit, and thus needs to be lowered. Therefore, the purge fluid, or more precisely, a portion of the supplied treatment fluid, is divided through the direct heat exchanger and mixed with the heating fluid to cool the heating fluid to the above-mentioned temperature. This increases the lifespan of the concentration unit and has the advantage of being suitable for low-concentration, high-volume gas processing.

[0065] The above direct heat exchanger may be provided with a valve capable of controlling the supply amount of the purge fluid and the heating fluid as needed to control the temperature of the heating fluid supplied to the concentrate within the above range, and may be provided on the flow path through which each fluid enters or exits the direct heat exchanger. In addition, the direct heat exchanger may further include a sensor capable of checking the temperature of the heating fluid supplied to the concentrate, thereby controlling the flow rate and temperature of the fluid flowing into or out of the direct heat exchanger in conjunction with the valve.

[0066] The above-mentioned concentration unit, having the structure described above, can control the concentration of the target substance in the treatment fluid introduced into the combustion oxidation unit and the flow rate of the treatment fluid. This allows the size of the combustion oxidation unit to be reduced, and treatment efficiency can also be significantly increased.

[0067] In the present invention, the combustion oxidation unit (200) introduces a treatment target substance separated from the treatment fluid through the concentration unit as described above, combusts it, and generates a clean fluid, and here, the heat generated in the concentration unit to be used as a desorption heat source for the treatment target substance can be transferred to the concentration unit, and more specifically, to a heat exchanger to be described later.

[0068] Specifically, the combustion oxidation unit may include a combustion oxidation unit housing (200) having a space inside as shown in FIG. 5 to combust and oxidize the material to be treated and generate a clean fluid, and comprising: an electric heater (210) provided on the upper portion of the housing and supplying thermal energy to the housing; a heat storage chamber (201, 202) provided in the space on the inner surface of the lower portion of the housing; and a buffer tank (250) provided to be linked with the switching damper and storing the treatment fluid introduced through the switching damper.

[0069] In the present invention, the combustion oxidation housing has a space inside as shown in FIG. 5 to combust and oxidize the substance to be treated and generate a clean fluid, and is provided with an inlet hole (203, 204) at the bottom for introducing a carrier fluid into the housing, and when the substance to be treated is supplied to one of the pair of inlet holes through the inlet hole and a switching damper to be described later, the other inlet hole can naturally discharge the clean fluid generated after the substance to be treated is combustibly oxidized.

[0070] As the combustion oxidation unit housing has a divided section as described above, the internal fluid flow can be supplied to the concentration unit through the switching damper (220) - inlet hole (203, 204) at the bottom of the housing - bottom of the housing - heat storage room (201, 202) - top of the housing - combustion oxidation room (210) equipped with an electric heater, as shown in FIG. 5, and the target substance that may remain in the clean fluid can be removed once more through the switching damper (220) - inlet hole (203, 204) at the bottom of the housing - bottom of the housing - heat storage room (201, 202) - top of the housing - stack (400). In addition, by guiding the untreated treatment target material in the order of switching damper (220) - inlet hole (223, 204) at the bottom of the housing - bottom of the housing - heat storage chamber (201, 202) - top of the housing - heat storage chamber (201, 202) - bottom of the housing - switching damper (220), the untreated treatment target material is stored and supplied to the combustion oxidation unit again for treatment, thereby generating a clean fluid.

[0071] In addition, the housing is provided with a hot gas outlet (205) and a hot bypass outlet (206) at the top to control the temperature inside the housing within a certain range, and at the same time, the material to be treated is burned through an electric heater and the generated heat is sent back to the concentrator so that the material to be treated adsorbed in the concentrator can be quickly removed.

[0072] The electric heater (210) that supplies thermal energy to the above housing is for removing the substance to be treated in the carrier fluid by heating the carrier fluid that has flowed into the upper part of the housing through the heat storage chamber (201, 202). The electric heater may be provided so as to protrude toward the inner surface of the combustion oxidation unit housing at the upper part of the combustion oxidation unit housing as shown in FIG. 5, and has the advantage of reducing the generation of secondary pollutants compared to conventional combustion burners.

[0073] In general, the carrier fluid contains water and the substance to be treated. As described above, most of the substances to be treated are composed of volatile organic compounds, so the proportion of carbon, nitrogen, and other elements in the substance is high.

[0074] The problem is that not only carbon and nitrogen but also water are directly oxidized into secondary products such as carbon dioxide and nitrogen oxides, and these secondary products can act as other environmental pollutants.

[0075] Furthermore, conventional combustion burners generate heat and fire by combusting fuels like LPG or LNG. Incomplete combustion of the fuel can result in the generation of additional pollutants, separate from the secondary byproducts of the target substances. These pollutants are often responsible for greenhouse gases, smog, and fine dust, necessitating the development of additional filtering facilities.

[0076] The present invention addresses the aforementioned issues by incorporating an electric heater as a heating means used in the combustion-oxidation section, thereby suppressing the generation of pollutants that can occur during incomplete combustion, a drawback of conventional combustion burners. Furthermore, by oxidizing the target material at low temperatures, energy savings are achieved and the generation of secondary byproducts is also reduced.

[0077] The high-temperature clean fluid formed by the above-described combustion oxidation process moves downward, passes through another accumulator chamber, and is discharged to the outside. At this time, the heat of the clean fluid discharged to the outside of the housing through the accumulator chamber is absorbed and stored by the operation of the switching damper described below, and is utilized as energy required to increase the temperature of the incoming carrier gas.

[0078] The above electric heater does not have a limited operating temperature, but as mentioned above, it is recommended to maintain it within 1000℃ to prevent failure due to damage at high temperatures. However, immediately after the entire facility is put into operation, the temperature of the combustion and oxidation chamber needs to be raised to approximately 750℃. Therefore, immediately after the facility is put into operation, it is recommended to operate it at a high temperature until the temperature of the combustion and oxidation chamber reaches the target temperature, and then, once sufficiently heated, adjust the operating temperature to the above range.

[0079] The above-described heat storage chamber (201, 202) is provided at the lower end of the combustion oxidation unit housing as described above, and may be provided as a pair in the space between the upper portion of the inlet hole and the combustion oxidation unit housing so that the pair of inlet holes can selectively inlet the substance to be treated or discharge the clean fluid, respectively. The heat storage material of the heat storage chamber has a honeycomb structure so that the fluid can flow freely, and the heat required for the combustion oxidation of the substance to be treated occurring at the upper portion can be stored to heat the carrier fluid entering later or reduce the amount of energy consumed during incineration.

[0080] The above-mentioned thermal storage material can be used without limitation on the type of ceramic material having micropores, as commonly used in the art. The honeycomb structure of this ceramic thermal storage material has numerous micropores, and a carrier fluid can penetrate these micropores and be introduced into the upper portion of the combustion oxidation unit housing.

[0081] Specifically, the above-mentioned heat storage material is formed by mixing silicon dioxide, iron oxide, cement, gypsum, yellow clay, kaolin, and quartz, and molding the mixture. In order to form pores, water-soluble or low-decomposition-temperature particles such as sodium chloride or starch are mixed in the mixture, and the mixture is molded, and a porous structure can be created by removing the particles.

[0082] The above switching damper (300) is provided on the outside of the combustion oxidation unit housing, but is connected to the lower part of the combustion oxidation unit housing where the heat storage chamber is located, and controls the flow of fluid to allow the carrier fluid to be introduced into the combustion oxidation unit housing through the first to fourth ports, or to send a portion of the carrier fluid that has not been processed back to the buffer tank for reprocessing.

[0083] Specifically, the switching damper (300) may include a damper housing (310) as shown in FIGS. 6 to 9; a first port (311) provided in the damper housing and through which a material to be treated is introduced from the concentration unit; a second port (312) and a third port (313) provided in the damper housing and through which a material to be treated is transferred from the damper housing to the combustion oxidation unit housing through a flow path or through which a carrier fluid is introduced from the combustion oxidation unit housing to the damper housing; a fourth port (314) provided in the damper housing and through which a carrier fluid is transferred from the damper housing to a buffer tank or a stack through a flow path; and a switching unit (320) provided inside the damper housing and through which the first port and the second port and the third port and the fourth port are connected through operation, respectively, or the first port and the third port and the second port and the fourth port are connected.

[0084] The above damper housing (310) serves as a passage through which carrier fluid flowing in through the first port passes, or through which carrier fluid is supplied to the combustion oxidation unit through the second to fourth ports, or through which carrier fluid that has completed combustion passes. In particular, it has a switching unit, which will be described later, provided therein so as to determine through which port the carrier fluid passes to be supplied to the combustion oxidation unit.

[0085] To this end, the damper housing has a space inside and can be physically divided into four spaces (space 1 to space 4) by a split panel of a switching unit to be described later. Each of these spaces can be connected to the outside through a port to transport a carrier fluid.

[0086] The first to fourth ports (311 to 314) are formed on the outer surface of the damper housing and serve to supply the material to be treated to the combustion oxidation unit or to discharge the carrier fluid after combustion from the damper housing.

[0087] Specifically, the first port (311) serves to introduce the material to be treated from the concentration unit into the damper housing, the second port (312) and the third port (313) are connected to the combustion oxidation unit housing of the combustion oxidation unit through a flow path to transport the material to be treated from the damper housing to the combustion oxidation unit housing or to introduce carrier fluid from the combustion oxidation unit housing to the damper housing, and the fourth port (314) can transport the carrier fluid from the damper housing to a buffer tank or stack through a flow path.

[0088] In addition, the switching unit (320) is provided inside the damper housing, and rotates to connect the first port and the second port and the third port and the fourth port, or to connect the first port and the third port and the second port and the fourth port.

[0089] This is implemented by the operation of the panel constituting the switching unit and the plug responsible for opening and closing the panel, and specifically, the switching unit may include, as shown in FIGS. 6 to 9, a dividing panel (321) provided inside the damper housing to divide the internal space of the damper housing into a first space to a fourth space; a communication hole (322) formed to penetrate one side and the other side of the dividing panel to communicate the space divided by the dividing panel; a first plug (323) located in the second space to selectively close the communication hole connecting the first space and the second space through a rotational movement, or to close the communication hole connecting the second space and the fourth space; and a second plug (324) located in the third space to selectively close the communication hole connecting the first space and the third space through a rotational movement, or to close the communication hole connecting the third space and the fourth space.

[0090] The above-mentioned dividing panel (321) is composed of two panels that respectively connect the opposing inner surfaces of the damper housing, as shown in FIGS. 6 to 9, and the panels cross inside the damper housing to physically completely divide the inner space of the damper housing into first to fourth spaces. Each of these spaces acts as a passage for the carrier fluid flowing into the damper housing, and in particular, can prevent the carrier fluid before combustion and the carrier fluid after combustion from mixing with each other during movement.

[0091] The above communication hole (322) is formed to penetrate one side and the other side of the split panel to connect the spaces divided by the split panel, thereby allowing the carrier fluid to be transported from one space to an adjacent space. A total of four communication holes can be formed so that two communication holes are in contact with each divided space. In other words, one divided space is formed so that one port and two communication holes are in contact with each other through the communication holes formed on the split panel.

[0092] The above first plug (323) and second plug (324) are provided to open and close the communication hole formed in the split panel, and are both provided inside the damper housing, but are provided in the second space and the third space divided by the split panel, respectively, as shown in FIGS. 6 to 9, and can close each communication hole by rotation.

[0093] Specifically, the first plug and the second plug have a rotation axis at the intersection where the two split panels meet, and can open or close any one of the communication holes formed in the second space and the third space around the rotation axis.

[0094] For example, as shown in FIGS. 6 to 9, the carrier fluid generated in the above-described enrichment section and sent toward the combustion oxidation section can be transferred to one of the two heat storage chambers provided at the bottom of the combustion oxidation section housing through a switching damper.

[0095] Fig. 7 shows a case where a carrier fluid is transferred to the left storage room among the two storage rooms, and the switching unit operates so that the first port (221), the second port (222), the third port (223), and the fourth port (224) are connected to each other. To this end, the first plug (323) formed in the second space opens a communication hole that allows the first space and the second space to communicate, and closes a communication hole that allows the second space and the fourth space to communicate, and the second plug (324) formed in the third space opens a communication hole that allows the third space and the fourth space to communicate, and closes a communication hole that allows the first space and the third space to communicate, so that the carrier fluid (solid line in FIG. 7) introduced through the first port is naturally transported to the left storage chamber along the second port and heated, and the heated carrier fluid is combustion-oxidized at the top of the combustion-oxidation chamber housing, and the carrier fluid (dotted line in FIG. 7) in which the substance to be treated is oxidized passes through the right storage chamber and is accumulated, and then flows out of the combustion-oxidation unit housing through the third port and can be transported again to a buffer tank or stack via the fourth port, which will be described later.

[0096] Conversely, when transporting the carrier fluid to the right storage room among the two storage rooms as shown in Fig. 9, the switching unit operates so that the first port (221) and the third port (223), and the second port (222) and the fourth port (224) are connected to each other. To this end, the first plug (323) formed in the second space closes the communication hole that allows the first space and the second space to communicate, and opens the communication hole that allows the second space and the fourth space to communicate, and the second plug (324) formed in the third space closes the communication hole that allows the third space and the fourth space to communicate, and opens the communication hole that allows the first space and the third space to communicate, so that the carrier fluid (solid line in FIG. 9) introduced through the first port is naturally transferred to the heat storage chamber on the right along the third port and heated, and the heated carrier fluid is combustion-oxidized at the top of the combustion-oxidation unit housing, and the carrier fluid (dotted line in FIG. 9) in which the substance to be treated is oxidized passes through the heat storage chamber on the left and is accumulated, and then flows out of the combustion-oxidation unit housing through the second port and can be transferred to a buffer tank or stack to be described later via the fourth port.

[0097] The above switching damper adjusts the internal split panel, the communication hole, and the plug as described above so that the two heat storage rooms alternately store and dissipate heat when the carrier fluid passes through them. That is, by passing the carrier fluid through the heated heat storage material, the heat storage material dissipates heat, and at the same time, the carrier fluid is heated to lower the heating temperature of the electric heater and thermally decompose the substance to be treated within the carrier fluid, and the carrier fluid heated through the electric heater again passes through the other heat storage material to lower the temperature of the carrier fluid and store heat in the heat storage material, thereby causing the two heat storage materials to alternately store and dissipate heat. Through this, the operating temperature of the electric heater can be lowered, the heating energy of the carrier fluid can be saved, and the removal efficiency of the substance to be treated can be maximized.

[0098] However, a point may occur within the switching damper where all ports are connected while the plug is in operation. In this case, the carrier fluid that has not yet entered the combustion oxidation unit housing may mix with the carrier fluid that has completed combustion oxidation, which may reduce the removal efficiency of the target substance. Therefore, by inducing the carrier fluid mixed within the switching damper to flow toward the buffer tank described below, the mixing of the target substance with the carrier fluid that has completed combustion oxidation can be minimized.

[0099] Specifically, the buffer tank (250) is provided to store untreated carrier fluid and supply untreated carrier fluid to a stack to be described later, and is connected to the switching damper as shown in FIGS. 1, 10, and 11 to supply and store carrier fluid within the combustion oxidation unit housing.

[0100] In addition, as described above, the buffer tank may further include a buffer damper (251) and an exhaust damper (252). This is to prevent untreated carrier fluid and treated carrier fluid within the switching damper from being mixed and discharged as clean fluid during the process of resetting the valve within the switching damper, and each damper may be opened and closed alternately to control the flow of fluid.

[0101] Specifically, when the switching valve operates so that the first port (221) and the second port (222), the third port (223) and the fourth port (224) are connected to each other (Fig. 7) as shown in Figs. 7 and 9, or when the first port (221) and the third port (223), the second port (222) and the fourth port (224) are connected to each other (Fig. 9), the exhaust damper is set to open and the buffer damper is set to close. In this case, the clean fluid passing through the switching damper can be discharged directly to the stack without passing through the buffer tank.

[0102] As shown in Fig. 10, the above buffer tank is connected to a buffer damper port (255) and an exhaust damper port (256), which are connected to a buffer damper and an exhaust damper, respectively, so that the carrier fluid can be introduced into the tank or the carrier fluid inside can be sent to a stack, a switching valve, or a concentration unit.

[0103] In addition, the buffer tank may further include a tank partition wall (257) inside, as shown in Fig. 11. This tank partition wall is intended to prevent the carrier fluid entering the tank from randomly spreading inside the tank and to sequentially fill the tank starting from the bottom of the tank, which is closer to the ground. To this end, the tank partition wall (257) may be formed to protrude in a zigzag shape on one side and the other side formed perpendicular to the bottom surface of the inner surface.

[0104] Here, the buffer tank may further be provided with a purge return pipe (254) located on the upper surface and directly supplying the carrier fluid inside the buffer tank to the concentration unit. The purge return pipe is formed by being introduced into the upper surface of the buffer tank to a certain length so that the carrier fluid remaining inside the buffer tank can be quickly transferred to the concentration unit, and in addition to its role of transporting the carrier fluid, it may also play a role of refreshing the inside of the buffer tank by introducing outside air into the inside of the buffer tank in some cases.

[0105] The carrier fluid stored in the buffer tank above contains the target substance, as it was supplied when the switching valve was switched. Therefore, it needs to be reprocessed, such as by sending it to the switching valve for combustion oxidation or by sending it back to the concentration unit.

[0106] To this end, the concentrated regenerative combustion oxidation device according to the present invention may further include an alternative valve (260) as shown in Fig. 1. The alternative valve may send the carrier fluid in the buffer tank toward the switching valve to perform combustion oxidation, or may send it to the front end of the concentrator to re-concentrate the material to be treated in the concentrator.

[0107] At this time, the alternative valve can determine whether to send it to the switching valve or the concentration unit depending on the concentration of the carrier fluid. Specifically, if the concentration of the target substance in the carrier fluid passing through the alternative valve is relatively high, the carrier fluid is circulated to the concentration unit for re-concentration, and if the concentration of the target substance is relatively low, the carrier fluid can be sent to the switching valve for combustion oxidation.

[0108] To this end, the alternative valve may further include a sensor (not shown) capable of measuring the concentration of the substance to be treated. Furthermore, it is preferable to include a selective opening / closing means (not shown) within the valve to allow the carrier fluid to be sent only in one direction, either toward the switching valve or toward the concentration section.

[0109]

[0110] A concentrated regenerative combustion oxidation device according to the present invention comprises a concentrator for effectively capturing a substance to be treated, including various types of volatile organic compounds (VOCs), from a treatment fluid, and a combustion oxidation device for treating the substance to be treated transferred from the concentrator, wherein the concentrator includes a concentrator in which adsorption, desorption, and purging of the substance to be treated are simultaneously performed through rotation, thereby simplifying the adsorption and desorption process and maximizing treatment efficiency.

[0111] While preferred embodiments of the present invention have been described above, it is clear that the present invention can utilize various variations, modifications, and equivalents, and that the above embodiments can be appropriately modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

[0112]

[0113] [Explanation of symbols]

[0114] 100: Concentrated

[0115] 110: Concentrator

[0116] 120: Concentrated section shear pipe

[0117] 121: Treatment fluid supply pipe

[0118] 122: Distributor

[0119] 123: Treatment fluid supply pipe expansion section

[0120] 124: Purge fluid supply pipe

[0121] 125: Purge fluid supply pipe expansion section

[0122] 126: Carrier fluid outlet pipe expansion section

[0123] 127: Carrier fluid discharge pipe

[0124] 130: Rear piping of the concentrated section

[0125] 131: Clean fluid discharge pipe expansion section

[0126] 132: Clean fluid outlet pipe

[0127] 133: Purge fluid outlet pipe expansion section

[0128] 134: Purge fluid discharge pipe

[0129] 135: Heating fluid supply pipe

[0130] 136: Heating fluid supply pipe expansion part

[0131] 160: Direct heat exchanger

[0132] 200: Combustion oxidation section

[0133] 201: Heat storage room

[0134] 202: Heat storage room

[0135] 203: Inflow / Outflow

[0136] 204: Inflow / outflow hole

[0137] 205: Hot gas outlet

[0138] 206: Hot bypass drain

[0139] 210: Combustion chamber electric heater

[0140] 250: Buffer tank

[0141] 251: Buffer damper

[0142] 252: Exhaust damper

[0143] 253: Return damper

[0144] 254: Purge return pipe

[0145] 255: Buffer damper port

[0146] 256: Exhaust damper port

[0147] 257: Tank bulkhead

[0148] 260: Alternative valve

[0149] 300: Switching damper

[0150] 310: Damper housing

[0151] 311: Port 1

[0152] 312: Port 2

[0153] 313: Port 3

[0154] 314: Port 4

[0155] 320: Switching section

[0156] 321: Split panel

[0157] 322: Yeontonggong

[0158] 323: First plug

[0159] 324: Second plug

[0160] 400: Stack

Claims

1. A concentrated regenerative combustion oxidation device that separates a substance to be treated from a treatment fluid containing various types of volatile organic compounds (VOCs) and removes the substance to be treated by combustion oxidation, wherein the device is A concentration unit that passes the above treatment fluid through the treatment fluid to adsorb the treatment target substance in the treatment fluid, and removes the adsorbed treatment target substance to filter the treatment fluid into a clean fluid; and A combustion oxidation unit that introduces the desorbed treatment target material, oxidizes it by combustion, and transfers the generated heat to a concentration unit to be used as a desorption heat source for the treatment target material; Includes, The above concentration unit performs adsorption, desorption and purging of the target substance simultaneously in one device through rotation, and the combustion-oxidation unit replaces the combustion-type burner using fossil energy with an electric heater. The above combustion oxidation unit has a plurality of paths through which the substance to be treated passes through the accumulator, and the paths can be changed according to the transport path of the substance to be treated. A concentrated regenerative combustion oxidation device with an electric heater applied, characterized in that the concentrated portion and the combustion oxidation portion change the rotation speed of the concentrated portion and the opening / closing cycle of the combustion oxidation portion according to the concentration of the material to be treated.

2. In paragraph 1, The above concentrated portion is, A circular cross-section is physically divided into an adsorption region for adsorbing a substance to be treated in a certain area, a desorption region for desorbing the adsorbed substance to be treated, and a purge region through a partition wall, and each region moves to a certain position through rotation; and a concentration unit for introducing the treatment fluid, discharging a clean fluid from which the substance to be treated is separated, introducing a heating fluid to separate the adsorbed substance to be treated, discharging a carrier fluid containing the substance to be treated desorbed through the heating fluid, and introducing and discharging a purge fluid for cooling; A concentrated regenerative combustion oxidation device having an electric heater, characterized in that it includes:

3. In paragraph 2, The above concentrated portion is, A distributor provided inside the housing to supply a portion of the treatment fluid flowing into the housing to an adsorption area and a portion to a purge area; A concentrated regenerative combustion oxidation device having an electric heater, characterized in that it further includes:

4. In paragraph 1, The above combustion oxidation unit is, A combustion oxidation unit housing having a space inside to incinerate the above-mentioned material to be treated and generate a clean fluid, and having a partition portion protruding upward on the lower inner surface of the housing to control the flow of the fluid; A switching damper that changes the path through which the material to be treated is introduced from the above-mentioned concentration unit and the path through which the carrier fluid generated in the housing is introduced through the operation; An electric heater provided on the upper side of the housing and supplying thermal energy to the housing; A heat storage material provided in the space between the lower inner surface of the housing and the combustion and oxidation chamber; and A buffer tank which is provided to communicate with the switching damper and stores the carrier fluid introduced through the switching damper; A concentrated regenerative combustion oxidation device having an electric heater, characterized in that it includes:

5. In paragraph 4, The above switching damper, damper housing; A first port provided in the above damper housing and through which a material to be treated is introduced from the concentration unit; A second port and a third port provided in the above damper housing, through which a material to be treated is transferred from the damper housing to the combustion oxidation unit housing via a flow path, or through which a carrier fluid is introduced from the combustion oxidation unit housing to the damper housing; A fourth port provided in the above damper housing and transporting carrier fluid from the damper housing to a buffer tank or stack through a euro; and A switching unit provided inside the above damper housing, which operates to connect the first port and the second port and the third port and the fourth port, or to connect the first port and the third port and the second port and the fourth port; A concentrated regenerative combustion oxidation device having an electric heater, characterized in that it includes:

6. In paragraph 5, The above switching unit, A partition panel provided inside the above damper housing to divide the internal space of the damper housing into a first space to a fourth space; A communication hole formed to penetrate one side and the other side of the above-mentioned split panel and connect the space divided by the split panel; A first plug located in the second space and selectively closing a communication hole connecting the first space and the second space through rotational movement, or closing a communication hole connecting the second space and the fourth space; and A second plug located in the third space and selectively closing a communication hole connecting the first space and the third space through rotational movement, or closing a communication hole connecting the third space and the fourth space; A concentrated regenerative combustion oxidation device having an electric heater, characterized in that it includes:

7. In paragraph 1, The above concentrated portion is, An auxiliary heater that provides auxiliary heat to the heating fluid delivered to the above-mentioned concentration unit; A concentrated regenerative combustion oxidation device having an electric heater, characterized in that it further includes:

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