Thermal storage combustion deodorization device

Abstract

A heat storage combustion deodorization device and an operation method of the heat storage combustion deodorization device are intended to have a compact structure that makes construction easier and improve the decomposition efficiency of organic matter in the treated gas. The heat storage combustion deodorization device (1) is composed of a combustion chamber (40), a heat storage area (10), a gas supply path (50), an exhaust path (60) and a purification path (70). The heat storage area (10) is composed of a heat storage chamber (11) that is connected to the combustion chamber (40) and has a heat storage body (12) built in each. The gas supply path (50) supplies the treated gas to the combustion chamber (40). The exhaust path (60) exhausts the exhaust gas to the atmosphere. The purification path (70) draws part of the exhaust gas from the combustion chamber (40) as the purification gas and circulates it to the gas supply path (50). The heat storage chamber (11) is divided into at least five chambers, and each heat storage chamber (11) is appropriately selected while performing the operation of the gas supply mode, the exhaust mode and the purification mode.

Description

Technical Field

[0001] The present invention relates to a thermal storage combustion deodorization device and an operation method of the thermal storage combustion deodorization device. Specifically, the present invention relates to a thermal storage combustion deodorization device and an operation method of the thermal storage combustion deodorization device, which has excellent construction performance due to a compact structure and can improve the decomposition efficiency of organic matter in the treated gas. Background Art

[0002] It is known that in factories that process chemical products such as electrophotographic toners, synthetic resins, coatings, pigments, pharmaceuticals, industrial chemicals, etc., a large amount of processed gas containing volatile organic compounds (VOCs) such as ethyl acetate, toluene, xylene, and styrene is generated. Moreover, such VOC-containing gases react with NOx to produce photochemical smog, and increase ozone, which is the main component of photochemical oxidants, in the troposphere, which also becomes a factor in global warming. Furthermore, these VOC-containing gases contain carcinogenic substances, so even at low concentrations, for example, they cause health damage to the human body.

[0003] Therefore, in various factories, gases containing VOCs are detoxified and discharged into the atmosphere. Methods for detoxifying gases containing VOCs include direct combustion, catalytic combustion, thermal storage combustion, and biological treatment. Among them, the thermal storage combustion method has the advantage of high heat recovery efficiency, so the thermal storage combustion deodorization device (Regenerative Thermal Oxidizer: RTO) using this thermal storage combustion method is widely used in various factories.

[0004] This heat storage combustion deodorization device allows untreated VOC-containing gas (hereinafter referred to as "treated gas") to flow through the heat storage material for preheating, and then introduces it into the furnace, where the treated gas is burned in the combustion chamber for harmless treatment, and the high-temperature treated gas (hereinafter referred to as "exhaust gas") is made to flow through the heat storage material again to accumulate its heat. When the low-temperature treated gas flows, the accumulated heat is released again for heat exchange.

[0005] Thermal storage combustion deodorization devices are roughly classified into a switching type and a rotary type. Regarding the switching type, there are two-tower, three-tower, or four-tower or more thermal storage combustion deodorization devices according to the number of thermal storage chambers. These multi-tower thermal storage combustion deodorization devices are widely used because of their operating costs and ease of maintenance compared to the rotary type. For example, Patent Documents 1 and 2 disclose a three-tower thermal storage combustion deodorization device.

[0006] In this three-tower heat storage combustion deodorization device, the treated gas is supplied to the combustion chamber through the first regenerator that has stored heat in the previous process, and is combusted by the burner. The high-temperature exhaust gas that has been subjected to the combustion treatment is discharged through the second regenerator, and heat is stored in the regenerator. A part of the exhaust gas is passed to the third regenerator, thereby performing a so-called purification treatment in which the treated gas remaining in the regenerator and the piping of the regenerator is removed.

[0007] Furthermore, by operating the switching valve provided on the piping connected to each heat storage chamber, the three operation cycles of air supply, exhaust and purification are switched in sequence at each specified time with respect to each heat storage chamber while continuing the operation. Thus, the treated gas can be oxidized and decomposed in the combustion chamber for deodorization, and the heat storage body can be used for preheating and heat recovery, thereby improving thermal efficiency.

[0008] Prior Art Literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Application Publication No. 2011-102664

[0011] Patent Document 2: Japanese Patent Application Publication No. 2016-217620 Summary of the invention

[0012] Problems to be solved by the invention

[0013] However, in the three-tower switchable thermal storage combustion deodorization device or the rotary thermal storage combustion deodorization device disclosed in Patent Documents 1 and 2, since a plurality of thermal storage chambers and accessory parts need to be installed, the device as a whole is large-scale and requires a certain size of installation site. In addition, large-scale construction work on site is also required during the construction of the device, which leads to a problem of increased construction cost.

[0014] On the other hand, even in the switchable thermal storage combustion deodorization device, the two-tower type has a relatively compact structure, so it does not require such a large installation site. In addition, in the construction of the device, since the device can be divided into multiple units and can be constructed by a simple assembly process at the installation site, the construction cost can be suppressed compared with other switchable or rotary thermal storage combustion deodorization devices.

[0015] However, in the two-tower heat storage combustion deodorization device, the treated gas retained in the heat storage body in a very short time flows back and is released into the atmosphere when the switching valve is working, or the limit value of the treated air volume is low, so the decomposition rate of the treated gas is worse than that of the three-tower and multi-tower heat storage combustion deodorization devices above.

[0016] The present invention is made in view of the above problems, and aims to provide a thermal storage combustion deodorization device and a method for operating the thermal storage combustion deodorization device, which have excellent constructability due to a compact structure and can improve the decomposition efficiency of organic matter in the treated gas.

[0017] Means to solve the problem

[0018] In order to achieve the above-mentioned purpose, the heat storage combustion deodorization device of the present invention is a heat storage combustion deodorization device, which is equipped with a combustion chamber, a heat storage area, an air supply path, an exhaust flow path, a purification flow path and a switching mechanism. The combustion chamber performs thermal decomposition of the treated gas; the heat storage area is composed of a plurality of heat storage chambers, which are connected to the combustion chamber and have a heat storage body inside, and are divided into n chambers in series in a tower (n is an integer greater than 5); the air supply path is connected to each heat storage chamber in the heat storage area to supply the treated gas to the above-mentioned combustion chamber; the exhaust flow path is connected to each heat storage chamber in the above-mentioned heat storage area to heat the treated gas in the above-mentioned combustion chamber. the decomposed exhaust gas is discharged; the purification flow path is connected to each heat storage chamber in the heat storage area to purify the treated gas remaining in the heat storage area; the switching mechanism performs switching control to the first group, the second group, and the third group in one operation process, the first group is composed of a plurality of heat storage chambers in which the above-mentioned air supply flow path is in a connected state; the second group is composed of the same number of heat storage chambers as the first group in which the above-mentioned exhaust flow path is in a connected state, and the heat storage chambers are heat storage chambers different from the first group; the third group is composed of a smaller number of heat storage chambers than the first group in which the above-mentioned purification flow path is in a connected state, and the heat storage chambers are heat storage chambers different from the first group and the second group.

[0019] Here, the heat storage combustion deodorization device is equipped with a combustion chamber for thermal decomposition of the treated gas. On the one hand, the treated gas containing organic solvents and odor components is kept above the ignition point of the odor components, and on the other hand, a certain residence time is set. In this way, the organic solvents and odor components can be oxidatively decomposed and rendered harmless.

[0020] In addition, by providing a heat storage area composed of a plurality of heat storage chambers connected to the combustion chamber and divided (multiple chambered) in series into n chambers (n is an integer greater than or equal to 5) in one tower, the heat storage area is a one-tower multi-chamber type composed of a plurality of heat storage chambers in one tower, so that any heat storage chamber can be selected to perform each process of gas supply, exhaust, and purification. Therefore, compared with the conventional multi-tower multi-chamber device, the entire device can be miniaturized and can be installed in a saved space, and large-scale construction work is not required when assembling the device.

[0021] In addition, by having a heat storage body inside the heat storage chamber, the heat storage body can be used as a heat exchanger. That is, the heat storage body is heated by the high-temperature exhaust gas discharged from the combustion chamber in the previous operation process, and the treated gas is passed through the heated heat storage body in the next operation process, thereby improving the thermal decomposition efficiency of the treated gas in the combustion chamber. In this way, by switching the operation cycle in sequence, the heat exchange efficiency of the entire device is improved, and the operating cost can be reduced.

[0022] In addition, by providing a gas supply path connected to each heat storage chamber in the heat storage area and supplying the treated gas to the combustion chamber, the treated gas can be supplied to the combustion chamber from the gas supply path through the heat storage chamber. At this time, since the treated gas receives heat from the heat storage body heated in the previous operation process and is supplied to the combustion chamber in a state heated to a certain extent, the thermal decomposition efficiency in the combustion chamber can be improved.

[0023] In addition, by providing an exhaust flow path connected to each heat storage chamber in the heat storage area and discharging the exhaust gas that has been thermally decomposed in the combustion chamber, the exhaust gas that has been rendered harmless in the combustion chamber can be released to the atmosphere through the exhaust flow path. At this time, the heat storage body can be heated by receiving heat from the high-temperature exhaust gas. Therefore, in the next operation process, by passing the low-temperature processed gas through the heated heat storage body, the temperature of the processed gas can be raised to a specified temperature, thereby improving the thermal decomposition efficiency in the combustion chamber.

[0024] In addition, by providing a purification flow path connected to each heat storage chamber in the heat storage area and purifying the treated gas remaining in the heat storage area, the purified gas is supplied to the combustion chamber or the gas supply path, thereby removing the treated gas containing organic compounds remaining in the heat storage body.

[0025] In addition, by providing a switching mechanism that can switch and control the connection state between each heat storage chamber and the gas supply path, the exhaust path, and the purification path, the flow path corresponding to the operation cycle can be freely selected. Therefore, since the heat storage chamber through which the treated gas supplied to the combustion chamber passes and the heat storage chamber through which the exhaust gas discharged from the combustion chamber passes can be switched in sequence according to the operation process, the temperature in the heat storage body and the combustion chamber and the residual treated gas concentration can be uniformized, thereby enabling stable operation of the device.

[0026] Furthermore, since the heat storage chambers and the respective flow paths are connected to each other by multi-chambering to form a small volume, when, for example, an on-off valve is used as a switching mechanism for switching the flow paths, the pressure fluctuation generated when the on-off valve is opened and closed can be reduced. Therefore, gas leakage etc. generated when the flow paths are switched can be prevented.

[0027] In addition, the switching mechanism performs switching control in one operation process to form a first group and a second group, wherein the first group is composed of a plurality of heat storage chambers whose air supply paths are in a connected state; and the second group is composed of the same number of heat storage chambers as the first group whose exhaust paths are in a connected state, and the heat storage chambers are different from those in the first group, thereby making the amounts of the treated gas supplied to the combustion chamber and the exhaust gas discharged from the combustion chamber uniform, and enabling stable supply and exhaust operation.

[0028] Furthermore, the switching mechanism performs switching control so as to form a third group, which is composed of a smaller number of heat storage chambers than the first group in which the purification flow path is in a connected state, and the heat storage chambers are heat storage chambers different from the first group and the second group, thereby preventing the treated gas remaining in the heat storage body from being directly released into the atmosphere.

[0029] At this time, since the number of the heat storage chambers constituting the third group is smaller than the number of the heat storage chambers constituting the first group and the second group, the purification ratio relative to the volume of the air supply and exhaust can be relatively reduced. Therefore, since the purification flow rate can be reduced, the volume of the purification flow path can be reduced, and the device as a whole can also be made compact.

[0030] In addition, the first group and the second group are composed of (n-1) / 2 (n is an odd number greater than or equal to 5) heat storage chambers, and the third group is composed of a single heat storage chamber. In this case, for example, when the heat storage area is composed of 9 chambers, in one operation cycle, the air supply path, the exhaust path, and the purge path are connected to the respective heat storage chambers at a ratio of 4:4:1. Therefore, as the total number of heat storage chambers increases, the ratio of the heat storage chambers for purification to the heat storage chambers for supply and exhaust becomes smaller, and the overall device can be miniaturized.

[0031] That is, in the conventional apparatus composed of multiple towers and multiple chambers, since the number of heat storage chambers connected to the air supply path, the exhaust path, and the purification path is a ratio of 1:1:1, the number of heat storage chambers for supply and exhaust is the same as the number of heat storage chambers for purification. Therefore, it is necessary to ensure that the purification path has only a certain volume, which causes the overall enlargement of the apparatus. However, in the present invention, by minimizing the volume of the purification path, the miniaturization of the apparatus can be achieved.

[0032] In addition, the switching control performed by the switching mechanism in the above-mentioned one operation process is to select a specified heat storage chamber that was connected to the above-mentioned gas supply path in the previous operation process of the above-mentioned one operation process to be connected to the above-mentioned purification flow path. In this case, by passing the treated gas supplied from the gas supply path through the heat storage chamber, the treated gas remaining in the heat storage body can be caused to circulate to either the combustion chamber or the gas supply path by the purification gas. Therefore, even if the switching mechanism is switched and the exhaust flow path is connected to the heat storage chamber, the treated gas remaining in the heat storage body can be prevented from being released to the atmosphere in an undecomposed state.

[0033] In addition, the switching control performed by the switching mechanism in the one operation process is to select a predetermined regenerator connected to the purification flow path in the previous operation process of the one operation process as one of the regenerators connected to the exhaust flow path. In this case, since the exhaust flow path is connected to the regenerator that has purified the treated gas remaining in the regenerator in the previous operation process, even if the exhaust gas passes through the regenerator, the remaining treated gas can be prevented from being released to the atmosphere in an undecomposed state.

[0034] In addition, the switching control performed by the switching mechanism in the above-mentioned one operation process is to select a specified heat storage chamber connected to the above-mentioned exhaust flow path in the previous operation process of the above-mentioned one operation process as one of the heat storage chambers connected to the above-mentioned air supply flow path. In this case, the high-temperature exhaust gas in the previous operation process passes through the heat storage chamber, and the heat storage chamber has a heat storage body that is heated by the exhaust gas and becomes high temperature, thereby supplying the treated gas to the combustion chamber. Therefore, since the temperature of the treated gas can be raised to a specified temperature, the heating and decomposition of the treated gas in the combustion chamber can be promoted.

[0035] In addition, the gas supply path has an air supply fan for supplying the treated gas, and the purification path extracts the exhaust gas from the combustion chamber and circulates it toward the upstream side of the air supply fan. In this case, by adopting a suction method of circulating from the combustion chamber through the purification path to the gas supply path as a purification method, the treated gas remaining in the heat storage body can be uniformly purified even in a narrow space.

[0036] In order to achieve the above-mentioned object, the operating method of the heat storage combustion deodorization device of the present invention is an operating method of the heat storage combustion deodorization device, wherein the method comprises a first step, a second step, a third step and a fourth step, in which in the first step, the gas to be treated is led to a first group, the first group is composed of a plurality of heat storage chambers specified among a plurality of heat storage chambers, the plurality of heat storage chambers are connected to a combustion chamber for heating and decomposing the gas to be treated, and have a heat storage body inside, and are divided into n chambers (n is an integer greater than 5) in series in one tower; in the second step, the gas to be treated that has passed through the first group is heated and decomposed in the combustion chamber; in the third step, the exhaust gas generated by the above-mentioned heating and decomposition is led to a second group, the second group is composed of heat storage chambers different from the heat storage chambers constituting the first group, and is composed of the same number of heat storage chambers as the first group; in the fourth step, the purified gas is led to a third group, the third group is composed of a smaller number of heat storage chambers than the first group, and the heat storage chambers are heat storage chambers different from the first group and the second group.

[0037] Here, by providing the first step of passing the processed gas to the first group consisting of a plurality of regenerators, the processed gas can be supplied to the combustion chamber through the first group consisting of a predetermined number of regenerators in the multi-chambered regenerator region.

[0038] Furthermore, by providing a second step of heating and decomposing the gas to be processed that has passed through the first group in the combustion chamber, the gas to be processed is heated and decomposed in the combustion chamber, thereby making it possible to render harmless the organic components contained in the gas to be processed and remove the odor.

[0039] In addition, there is a third step in which the exhaust gas generated by thermal decomposition is directed to a second group, the second group being composed of a heat storage chamber different from the heat storage chamber constituting the first group and being composed of the same number of heat storage chambers as the first group, thereby making it possible to make the gas volumes of supply and exhaust uniform and to perform supply and exhaust operation stably.

[0040] Furthermore, by allowing the waste gas that is heated and decomposed in the combustion chamber and becomes high temperature to be discharged through the regenerators constituting the second group, the regenerators in the regenerators are heated by the waste gas, thereby raising the temperature of the regenerators. Therefore, in the next operation process, the gas to be processed flows to all or part of the regenerators constituting the second group, thereby raising the temperature of the gas to be processed to a predetermined temperature, thereby improving the thermal decomposition efficiency of the gas to be processed.

[0041] In addition, by providing a fourth step, in which the purified gas is directed to a third group, the third group being composed of a smaller number of regenerators than the first and second groups, the regenerators being different from the first and second groups, thereby purifying the treated gas remaining in the regenerators of the regenerators constituting the third group, thereby preventing the treated gas from being released into the atmosphere in an undecomposed state.

[0042] In addition, the first step to the fourth step are regarded as one operation step, and all or part of the regenerators constituting the first group to the third group are switched in sequence in each operation step. In this case, since the regenerators constituting the regenerator area are switched in sequence to the respective steps of gas supply, exhaust, and purification, the decomposition capacity of the gas to be processed in the device can be made uniform.

[0043] Effects of the Invention

[0044] The thermal storage combustion deodorizing device and the operating method of the thermal storage combustion deodorizing device of the present invention are a thermal storage combustion deodorizing device and an operating method of the thermal storage combustion deodorizing device which have excellent constructability due to a compact structure and can improve the decomposition efficiency of organic matter in the treated gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of a thermal storage combustion deodorizing device according to an embodiment of the present invention.

[0046] Figure 2 It is a partially sectional front view of the thermal storage combustion deodorizing device according to the embodiment of the present invention.

[0047] Figure 3 It is a partial cross-sectional side view of the thermal storage combustion deodorizing device according to the embodiment of the present invention.

[0048] Figure 4 It is a diagram showing the gas flow of the thermal storage combustion deodorizing device according to the embodiment of the present invention.

[0049] Figure 5 This is a schematic diagram showing an operation mode of Example 1 of the thermal storage combustion deodorizing device according to the embodiment of the present invention.

[0050] Figure 6 This is a schematic diagram showing an operation mode of Example 2 of the thermal storage combustion deodorizing device according to the embodiment of the present invention. DETAILED DESCRIPTION

[0051] Modes for carrying out the invention

[0052] Hereinafter, the embodiments of the present invention related to the thermal storage combustion deodorization device and the operation method of the thermal storage combustion deodorization device will be described with reference to the accompanying drawings for understanding of the present invention. In addition, in the following description, the treated gas, the exhaust gas, and the purified gas are collectively defined as "gas". In addition, in the state where the thermal storage combustion deodorization device is set, the direction from the setting surface to the top is defined as the upper direction, the opposite direction of the upper direction is defined as the lower direction, the axial direction represented by the upper direction and the lower direction is defined as the vertical direction, and the axial direction perpendicular to the vertical direction is defined as the horizontal direction.

[0053] First, based on Figure 1 to Figure 4 , the thermal storage combustion deodorization device 1 according to the embodiment of the present invention is described. Figure 1 to Figure 3 As shown, the heat storage combustion deodorization device 1 is composed of a combustion chamber 40, a heat storage area 10, an air supply path 50, an exhaust flow path 60 and a purification flow path 70. The combustion chamber 40 is used to heat and decompose the treated gas; the heat storage area 10 is composed of 7-chamber heat storage chambers 11 (11A~11G), and the 7-chamber heat storage chambers 11 (11A~11G) are connected to this combustion chamber 40 and have built-in heat storage bodies 12 respectively; the air supply path 50 is connected to the air supply fan 20, and supplies the treated gas supplied from the treated gas supply source not shown in the figure to the combustion chamber 40; the exhaust flow path 60 discharges the treated exhaust gas that has been heated and decomposed (oxidatively decomposed) in the combustion chamber 40 to the atmosphere; the purification flow path 70 uses the purification blower 30 to suck a part of the treated gas after combustion from the combustion chamber 40 as a purified gas, so that it circulates to the upstream side of the air supply fan 20.

[0054] Here, the heat storage chamber 11 constituting the heat storage area 10 does not necessarily need to be composed of 7 heat storage chambers 11A to 11G. In the embodiment of the present invention, the heat storage chamber 11 can be composed of at least 5 chambers, and more preferably an odd number of heat storage chambers 11 of 5 chambers or more. In addition, for the convenience of explanation, the following description is based on the heat storage chamber 11 composed of 7 chambers or 9 chambers disclosed in the drawings.

[0055] In addition, the purification flow path 70 does not necessarily need to be a suction form in which a part of the exhaust gas of the combustion chamber 40 is sucked by the purification blower 30. In the embodiment of the present invention, a suction form is adopted in which the treated gas remaining inside the heat storage body 12 can be uniformly purified even in a narrow space, but, for example, a pressurization method of pushing the purified gas toward the combustion chamber 40 may also be adopted.

[0056] The combustion chamber 40 is provided with a burner 41. A fuel supply path 43 is connected to the burner 41 for supplying LNG as a driving fuel of the burner 41 through a fuel on-off valve 42. In addition, temperature sensors (not shown) for detecting the temperature in the combustion chamber 40 are provided at multiple locations in the combustion chamber 40, and the fuel on-off valve 42 of the fuel supply path 43 can be controlled based on the signal from the temperature sensor to change the flow rate of the fuel supplied to the burner 41.

[0057] The heat storage chambers 11 constituting the heat storage area 10 are respectively constituted of the same volume, and adjacent heat storage chambers 11 are separated by heat-resistant partition plates 13 so that the gas passing through the heat storage area 10 does not affect the adjacent heat storage chambers 11 .

[0058] The heat storage body 12 (12A to 12G) built into the heat storage chamber 11 is composed of a structure in which multiple layers of ceramic honeycomb structures are stacked, but for example, it can also be appropriately adopted from a known structure such as a structure in which ceramic or metal spherical structures are stacked to a predetermined height or a structure in which multiple ceramic or metal pipes are cut into a predetermined length.

[0059] The air supply path 50, the exhaust path 60 and the purification path 70 are formed in the space formed below the heat storage area 10 along the length direction of the heat storage combustion deodorization device 1. When viewed from above, the air supply path 50 is arranged on one side with the purification path 70 sandwiched therebetween, and the exhaust path 60 is arranged on the other side.

[0060] The heat storage chamber 11 and the air supply passage 50 are connected via the air supply switching valve 51 (51A to 51G), and the heat storage chamber 11 and the exhaust passage 60 are connected via the exhaust switching valve 61 (61A to 61G). The air supply switching valve 51 and the exhaust switching valve 61 are composed of a substantially circular valve body and a valve shaft connected to a substantially central portion of the valve body, for example, in a front view, and the air supply passage 50 and the heat storage area 10 and the exhaust passage 60 and the heat storage area 10 can be switched between a connected state and a non-connected state by switching control by a control device (not shown) to reciprocate along the axial direction of the valve shaft.

[0061] When the processed gas is supplied from the gas supply passage 50 to the regenerator 11, the processed gas flows into the regenerator 11 from the gap formed by the gas supply switching valve 51 moving in the open direction, and is supplied to the combustion chamber 40 ( Figure 4 a). On the other hand, when the exhaust gas is discharged from the combustion chamber 40 to the atmosphere, the exhaust gas that has passed through the heat storage chamber 11 is discharged from the combustion chamber 40 to the atmosphere through the gap formed by the exhaust switching valve 61 moving in the opening direction ( Figure 4 c).

[0062] like Figure 1As shown, each heat storage chamber 11 and the purge flow path 70 are connected via a purge switching valve 71 (71A to 71G). The purge switching valve 71 can be, for example, a one-way valve that moves in the open direction when the purge pressure from the combustion chamber 40 acts. Thus, the purge switching valve 71 can be controlled in the open direction only when purge is required, thereby preventing backflow from the air supply path 50 and the exhaust flow path 60 to the combustion chamber.

[0063] Here, the air supply switching valve 51 , the exhaust switching valve 61 , and the purge switching valve 71 are not necessarily limited to the above-described configurations, and may be appropriately selected from known switching valves.

[0064] The heat storage combustion deodorization device 1 configured as described above mainly operates in the air supply mode, the purification mode, and the exhaust mode as one cycle. The air supply mode and the exhaust mode in the heat storage chamber 11 are respectively assigned to any three heat storage chambers, and the purification mode is assigned to any one of the remaining heat storage chambers, and the heat storage chambers assigned to each mode are sequentially switched while operating.

[0065] Here, by making the number of regenerators allocated to the gas supply mode and the exhaust mode the same, the gas supply amount and the exhaust amount become uniform, so that the treated gas can be effectively heated and decomposed. Furthermore, by making the number of regenerators allocated to the purification mode smaller than the number of regenerators allocated to the gas supply mode and the exhaust mode, it is sufficient to ensure the minimum necessary volume as the purification flow path.

[0066] That is, in the conventional multi-tower type, for example, a three-tower type, the heat storage combustion deodorization device can be operated while switching the air supply mode, the exhaust mode, and the purification mode in sequence. Therefore, the volume of the heat storage chamber allocated to the purification mode cannot be relatively smaller than the volume of the heat storage chamber allocated to the air supply mode and the exhaust mode (that is, the volume of the heat storage chamber allocated to all modes is the same). Therefore, the purification flow path also needs to ensure a certain volume, similar to the air supply flow path and the exhaust flow path, which becomes a factor leading to the enlargement of the entire device.

[0067] In contrast, in the thermal storage combustion deodorization device 1 according to the embodiment of the present invention, by arranging a plurality of thermal storage chambers 11 in a multi-chambered manner within one tower, the number of thermal storage chambers 11 allocated to the purification mode can be relatively reduced relative to the number of thermal storage chambers 11 allocated to the air supply mode and the exhaust mode.

[0068] Therefore, if Figure 3As shown, as the shape of the purification flow path 70, since the upper part can be made into a narrow shape with the same size as the heat storage chamber 11 and the tip facing downward to reduce the volume, the degree of freedom in designing the air supply flow path 50 and the exhaust flow path 60 is improved, and the entire heat storage combustion deodorization device 1 can be made into a compact structure. In addition, even if the heat storage chamber 11 assigned to the purification mode is one chamber, as described later, the heat storage chamber 11 assigned to the purification mode is switched in sequence in each operation cycle. Therefore, since all the heat storage chambers 11 are purified at once through the operation cycle, there is no worry that the treated gas remaining in the heat storage body 12 will be directly released to the atmosphere.

[0069] Next, a specific operation method of the thermal storage combustion deodorization device 1 according to the embodiment of the present invention will be described. In addition, as the thermal storage chamber 11 described in the following embodiment, a thermal storage combustion deodorization device 1 based on multi-chambering of nine chambers (11A to 111) will be described.

[0070] <Example 1>

[0071] first, Figure 5 1 is a conceptual diagram showing the operation mode of the embodiment 1 of the thermal storage combustion deodorization device 1, and Table 1 is a table showing the state of the switching valve in each operation mode (○ is open, × is closed). In the operation mode of the embodiment 1, the thermal storage chamber 11 composed of four adjacent chambers is allocated as one area to the air supply mode and the exhaust mode, respectively, and the remaining one chamber is allocated as the thermal storage chamber of the purification mode.

[0072] First, in Figure 5 In the first operation cycle (step 1) shown in (a), as the gas supply mode, the heat storage chambers 11 through which the exhaust gas passed and the heat storage body 12 became high temperature in the operation cycle until the last time, for example, the four heat storage chambers 11F to 11l, are selected as the first group in the heat storage area 10. At this time, the gas supply switching valves 51F to 51l are switched to "open", the gas supply switching valves 51A to 51E are switched to "closed", the exhaust switching valves 61A to 61l are switched to "closed", and the purification switching valves 71A to 71l are switched to "closed", and the treated gas is supplied to the heat storage chambers 11F to 11l that are in communication with the gas supply passage 50. The treated gas that has passed through the heat storage chambers 11F to 11l is heated by the heat storage body 12 and then supplied to the combustion chamber 40. In addition, the treated gas supplied to the combustion chamber 40 is heated to a high temperature by the burner 41, and the organic compounds and odors contained in the treated gas are thermally decomposed.

[0073] In the exhaust mode, the heat storage chambers 11 in the heat storage area 10 that have been purified in the previous operation cycle and cooled by the passage of the treated gas are selected as the second group, for example, the four chambers of the heat storage chambers 11A to 11D. At this time, the exhaust switching valves 61A to 61D corresponding to the heat storage chambers 11A to 11D are switched to "open", the air supply switching valves 51A to 511 and the exhaust switching valves 61E to 611 are switched to "closed", and the purification switching valves 71A to 711 are switched to "closed", and the exhaust gas is discharged from the combustion chamber 40 to the heat storage chambers 11A to 11D. The exhaust gas discharged from the combustion chamber 40 passes through the heat storage chambers 11A to 11D and is released to the atmosphere through the exhaust flow path 60 that is in a connected state. At this time, the heat storage body is heated to a certain temperature by the heat from the high-temperature exhaust gas.

[0074] In the purification mode, a heat storage chamber in the heat storage area 10 through which the treated gas passed and the treated gas remained in the operation cycle until the last time is selected as the third group, for example, the heat storage chamber 11E. At this time, the corresponding purification switching valve 71E is switched to "open", and the air supply switching valves 51A to 511, the exhaust switching valves 61A to 611, and the purification switching valves 71A to 71D, 71F to 711 are switched to "closed", and a part of the exhaust gas supplied from the combustion chamber 40 passes through the heat storage chamber 11E, and passes through the purification flow path 70 connected to the heat storage chamber 11E together with the treated gas remaining in the heat storage body 12E, circulates to the upstream of the air supply fan 20 of the air supply flow path 50, and is supplied to the combustion chamber 40 again.

[0075] When a series of cycles of the air supply mode, the exhaust mode, and the purge mode are completed as the first operation cycle, the switching valve is controlled to shift to the second operation cycle as the next operation cycle. Figure 5 (b) shows the connection state between the heat storage area 10 and the air supply flow path 50 , the exhaust flow path 60 , and the purge flow path 70 in the second operation cycle.

[0076] like Figure 5 As shown in (b), in the gas supply mode of the second operation cycle (step 2), the regenerators 11G to 111 maintain the gas supply mode while maintaining the state of the first operation cycle. On the other hand, the regenerator 11A, which is in the exhaust mode in the first operation cycle, is switched to the gas supply mode instead of the regenerator 11F, which is in the low temperature state due to the repeated passage of the processed gas. That is, in the second operation cycle, the regenerator 11A and the regenerators 11G to 111 constitute the first group as the gas supply mode.

[0077] In the exhaust mode, the regenerators 11B to 11D in the heat storage area 10 maintain the exhaust mode while maintaining the state of the first operation cycle. On the other hand, the regenerator 11E constitutes the second group as the exhaust mode, instead of the regenerator 11A switched to the air supply mode. Since the regenerator 11E is in the purification mode in the first operation cycle, the treated gas remaining in the heat storage body 12E is purified. Therefore, by the exhaust gas passing through the regenerator 11E, the residual gas in the heat storage body 12E can be prevented from being released to the atmosphere.

[0078] In the purification mode, the regenerator 11F, which is in the gas supply mode in the first operation cycle, constitutes the third group. That is, in the operation cycle up to this point, the processed gas repeatedly passes through, and thus a large amount of processed gas remains in the regenerator 12F. Therefore, in the second operation cycle, by switching the regenerator 11F to the purification mode, the remaining processed gas can be purified.

[0079] As described above, in the air supply mode of the second operation cycle, the air supply switching valves 51A, 51G to 51l corresponding to the heat storage chambers 11A, 11G to 11l are switched to "open", the air supply switching valves 51B to 51F are "closed", the exhaust switching valves 61A to 61l are "closed", and the purification switching valves 71A to 71l are "closed".

[0080] In addition, in the exhaust mode of the second operation cycle, the exhaust switching valves 61B to 61E corresponding to the heat storage chambers 11B to 11E are switched to "open", the air supply switching valves 51A to 51l are switched to "closed", the exhaust switching valves 61A, 61F to 61l are switched to "closed", and the purification switching valves 71A to 71l are switched to "closed".

[0081] Furthermore, in the purification mode in the second operation cycle, the purification switching valve 71F corresponding to the heat storage chamber 11F is switched to "open", and the air supply switching valves 51A to 511, the exhaust switching valves 61A to 611, and the purification switching valves 71A to 71E and 71G to 711 are switched to "closed".

[0082] When the series of cycles of the air supply mode, the exhaust mode, and the purge mode are completed as the second operation cycle, the switching valve is controlled to shift to the third operation cycle as the next operation cycle. Figure 5 (c) shows the connection state between the heat storage area 10 and the air supply flow path 50 , the exhaust flow path 60 , and the purge flow path 70 in the third operation cycle.

[0083] like Figure 5As shown in (c), in the gas supply mode of the third operation cycle (step 3), the regenerators 11A, 11H, and 111 maintain the gas supply mode while maintaining the state of the second operation cycle. On the other hand, in the third operation cycle, the regenerator 11B in the exhaust mode is switched to the gas supply mode, instead of the regenerator 11G which is in a low temperature state due to repeated passage of the processed gas. That is, in the third operation cycle, the regenerators 11A, 11B, 11H, and 111 constitute the first group as the gas supply mode.

[0084] In the exhaust mode, the regenerators 11C to 11E maintain the state of the second operation cycle and constitute the second group. On the other hand, the regenerator 11F constitutes the second group as the exhaust mode, instead of the regenerator 11B switched to the air supply mode. The regenerator 11F purifies the treated gas remaining in the thermal storage body 12F because it is in the purification mode in the second operation cycle. Therefore, the exhaust gas passes through the regenerator 11F, thereby preventing the residual gas in the thermal storage body 12F from being released to the atmosphere.

[0085] The regenerator 11G, which was in the gas supply mode in the second operation cycle, constitutes the third group as the purification mode. That is, in the operation cycles up to this point, the processed gas repeatedly passes through, and thus a large amount of processed gas remains in the regenerator 12G. Therefore, in the third operation cycle, by switching the regenerator 11G to the purification mode, the remaining processed gas can be purified.

[0086] As described above, in the air supply mode of the third operation cycle, the air supply switching valves 51A, 51B, 51H, 51l corresponding to the heat storage chambers 11A, 11B, 11H, 11l are switched to "open", the air supply switching valves 51C to 51G are "closed", the exhaust switching valves 61A to 61l are "closed", and the purification switching valves 71A to 71l are "closed".

[0087] In addition, in the exhaust mode in the third operation cycle, the exhaust switching valves 61C to 61F corresponding to the heat storage chambers 11C to 11F are switched to "open", the air supply switching valves 51A to 51l are switched to "closed", the exhaust switching valves 61A, 61B, 61G to 61l are switched to "closed", and the purification switching valves 71A to 71l are switched to "closed".

[0088] Furthermore, in the purification mode in the third operation cycle, the purification switching valve 71G corresponding to the heat storage chamber 11G is switched to "open", and the air supply switching valves 51A to 511, the exhaust switching valves 61A to 611, and the purification switching valves 71A to 71F, 71H, and 711 are switched to "closed".

[0089] As for the fourth operation mode and thereafter, since the heat storage chambers constituting the air supply mode, the exhaust mode and the purification mode are replaced one by one in sequence while continuing to operate, it is possible to maintain a uniform supply and exhaust volume while purifying all the heat storage chambers in sequence at prescribed timings.

[0090] [Table 1]

[0091]

[0092]

[0093] <Example 2>

[0094] Figure 6 1 is a conceptual diagram showing the operation mode of the second embodiment of the thermal storage combustion deodorization device 1, and Table 2 is a table showing the state of the switching valve in each operation mode (○ is open, × is closed). In the operation mode of the first embodiment, the adjacent thermal storage chambers 11 are grouped and assigned to the air supply mode, the exhaust mode, and the purification mode, but in the operation mode of the second embodiment, while arbitrarily selecting individual thermal storage chambers 11, they are operated in the air supply mode, the exhaust mode, and the purification mode.

[0095] First, in Figure 6 In the first operation cycle (step 1) shown in (a), as the gas supply mode, the heat storage chambers in the heat storage area 10 through which the exhaust gas passed and the heat storage body became high temperature in the operation cycle until the last time, for example, the four chambers of the heat storage chambers 11A, 11D, 11F, and 11H are selected as the first group. At this time, the gas supply switching valves 51A, 51D, 51F, and 51H are switched to "open", the gas supply switching valves 51B, 51C, 51E, 51G, and 51l are switched to "closed", the exhaust switching valves 61A to 61l are switched to "closed", and the purification switching valves 71A to 71l are switched to "closed", and the treated gas is supplied to the heat storage chambers 11A, 11D, 11F, and 11H in a state of communication with the gas supply path 50. The treated gas passing through the heat storage chambers 11A, 11D, 11F, and 11H is heated by the heat storage body 12 and then supplied to the combustion chamber 40. The treated gas supplied to the combustion chamber 40 is heated to a high temperature by the burner 41 to thermally decompose organic compounds and odors contained in the treated gas.

[0096] In the exhaust mode, the heat storage chambers in the heat storage area 10 that have been purified in the previous operation cycle and cooled by the passage of the treated gas are selected as the second group, for example, the four chambers of the heat storage chambers 11C, 11E, 11G, and 11l. At this time, the exhaust switching valves 61C, 61E, 61G, and 61l corresponding to the heat storage chambers 11C, 11E, 11G, and 11l are switched to "open", the air supply switching valves 51A to 51l and the exhaust switching valves 61A, 61B, 61D, 61F, and 61H are switched to "closed", and the purification switching valves 71A to 71l are switched to "closed". The exhaust gas discharged from the combustion chamber 40 passes through the heat storage chambers 11C, 11E, 11G, and 11l, and is discharged to the atmosphere through the exhaust flow path 60 that is in a connected state. At this time, the heat storage body 12 is heated to a certain temperature by the high-temperature exhaust gas.

[0097] In the purification mode, a heat storage chamber in the heat storage area 10 through which the treated gas passed and remained in the operation cycle until the last time is selected as the third group, for example, the heat storage chamber 11B. At this time, the corresponding purification switching valve 71B is switched to "open", and the air supply switching valves 51A to 511, the exhaust switching valves 61A to 611, and the purification switching valves 71A, 71C to 71D are switched to "closed", and a part of the exhaust gas supplied from the combustion chamber 40 passes through the heat storage chamber 11B, and passes through the purification flow path 70 in a connected state together with the treated gas remaining in the heat storage body 12B, circulates to the upstream of the air supply fan 20 of the air supply flow path 50, and is supplied to the combustion chamber 40 again.

[0098] When a series of cycles of the air supply mode, the exhaust mode, and the purge mode are completed as the first operation cycle, the switching valve is controlled to shift to the second operation cycle as the next operation cycle. Figure 6 (b) shows the connection state between the heat storage area 10 and the air supply flow path 50 , the exhaust flow path 60 , and the purge flow path 70 in the second operation cycle.

[0099] like Figure 6 As shown in (b), in the gas supply mode of the second operation cycle (step 2), the regenerators 11A, 11F, and 11H maintain the state of the first operation cycle and constitute the first group. On the other hand, the regenerator 11C, which is in the exhaust mode in the first operation cycle, is switched to the gas supply mode instead of the regenerator 11D which is in the low temperature state due to the repeated passage of the processed gas. That is, in the second operation cycle, the regenerators 11A, 11C, 11F, and 11H constitute the first group in the gas supply mode.

[0100] In the exhaust mode, the regenerators 11E, 11G, and 111 maintain the state of the first operation cycle and constitute the second group. On the other hand, the regenerator 11B constitutes the second group as the exhaust mode, instead of the regenerator 11C switched to the gas supply mode. Since the regenerator 11B is in the purification mode in the first operation cycle, the treated gas remaining in the regenerator 12B is purified. Therefore, the exhaust gas passes through the regenerator 11B, thereby preventing the residual gas in the regenerator 12B from being released to the atmosphere.

[0101] The regenerator 11D, which is in the gas supply mode in the first operation cycle, constitutes the third group as the purification mode. That is, in the operation cycle up to this point, the processed gas repeatedly passes through, and thus a large amount of processed gas remains in the regenerator 12D. Therefore, in the second operation cycle, by switching the regenerator 11D to the purification mode, the remaining processed gas can be purified.

[0102] As described above, in the air supply mode of the second operation cycle, the air supply switching valves 51A, 51C, 51F, 51H corresponding to the heat storage chambers 11A, 11C, 11F, 11H are switched to "open", the air supply switching valves 51B, 51D, 51E, 51G, 51l are "closed", the exhaust switching valves 61A~61l are "closed", and the purification switching valves 71A~71l are "closed".

[0103] In addition, in the exhaust mode in the second operation cycle, the exhaust switching valves 61B, 61E, 61G, and 61l corresponding to the heat storage chambers 11B, 11E, 11G, and 11l are switched and controlled to "open", the air supply switching valves 51A to 51l are switched and controlled to "close", the exhaust switching valves 61A, 61C, 61D, 61F, and 61H are switched and controlled to "close", and the purification switching valves 71A to 71l are switched and controlled to "close".

[0104] Furthermore, in the purification mode of the second operation cycle, the purification switching valve 71D corresponding to the heat storage chamber 11D is switched to "open", and the air supply switching valves 51A to 511, the exhaust switching valves 61A to 611, and the purification switching valves 71A to 71C and 71E to 711 are switched to "closed".

[0105] When the series of cycles of the air supply mode, the exhaust mode, and the purge mode are completed as the second operation cycle, the switching valve is controlled to shift to the third operation cycle as the next operation cycle. Figure 6 (c) shows the connection state between the heat storage area 10 and the air supply flow path 50 , the exhaust flow path 60 , and the purge flow path 70 in the third operation cycle.

[0106] like Figure 6As shown in (c), in the gas supply mode of the third operation cycle (step 3), the regenerators 11A, 11C, and 11H maintain the state of the second operation cycle and constitute the first group. On the other hand, in the third operation cycle, the regenerator 11E in the exhaust mode is switched to the gas supply mode, instead of the regenerator 11F which is in a low temperature state due to repeated passage of the processed gas. That is, in the third operation cycle, the regenerators 11A, 11C, 11E, and 11H constitute the first group in the gas supply mode.

[0107] In the exhaust mode, the regenerators 11B, 11G, and 111 maintain the state of the second operation cycle and constitute the second group. On the other hand, the regenerator 11D constitutes the second group as the exhaust mode, instead of the regenerator 11E switched to the air supply mode. The regenerator 11D purifies the treated gas remaining in the regenerator 12D in the second operation cycle because it is in the purification mode. Therefore, the exhaust gas passes through the regenerator 11D, thereby preventing the residual gas in the regenerator 12D from being released to the atmosphere.

[0108] The regenerator 11F, which was in the gas supply mode in the second operation cycle, constitutes the third group as the purification mode. That is, in the operation cycles up to this point, the processed gas repeatedly passes through, and thus a large amount of processed gas remains in the regenerator 12F. Therefore, in the third operation cycle, by switching the regenerator 11F to the purification mode, the remaining processed gas can be purified.

[0109] As described above, in the air supply mode of the third operation cycle, the air supply switching valves 51A, 51C, 51E, and 51H corresponding to the heat storage chambers 11A, 11C, 11E, and 11H are switched to "open", the air supply switching valves 51B, 51D, 51F, 51G, and 51l are switched to "closed", the exhaust switching valves 61A to 61l are switched to "closed", and the purification switching valves 71A to 71l are switched to "closed".

[0110] In addition, in the exhaust mode in the third operation cycle, the exhaust switching valves 61B, 61D, 61G, and 61l corresponding to the heat storage chambers 11B, 11D, 11G, and 11l are switched and controlled to "open", the air supply switching valves 51A to 51l are switched and controlled to "close", the exhaust switching valves 61A, 61C, 61E, 61F, and 61H are switched and controlled to "close", and the purification switching valves 71A to 71l are switched and controlled to "close".

[0111] Furthermore, in the purification mode in the third operation cycle, the purification switching valve 71F corresponding to the heat storage chamber 11F is switched to "open", and the air supply switching valves 51A to 511, the exhaust switching valves 61A to 611, and the purification switching valves 71A to 71E and 71G to 711 are switched to "closed".

[0112] As for the fourth operation mode and thereafter, the heat storage chambers constituting the air supply mode, the exhaust mode and the purification mode are replaced one by one in sequence while continuing to operate. Therefore, the air supply and exhaust volumes can be evenly maintained while all the heat storage chambers are purified in sequence at specified times.

[0113] [Table 2]

[0114]

[0115]

[0116] In addition, in the first and second embodiments, the heat storage area 10 is shown to be composed of the heat storage chambers 11A to 111, but as long as at least five or more heat storage chambers are formed, the operation can be performed in the same operation mode. In particular, by multiplying the heat storage chambers to five or more chambers and making them an odd number, one of the heat storage chambers is set to the purification mode, and the remaining heat storage chambers are evenly allocated to the air supply mode and the exhaust mode, thereby ensuring a sufficient air supply and exhaust volume while performing minimum purification, thereby achieving a structure that can achieve compactness of the entire device and promote thermal decomposition.

[0117] As described above, the thermal storage combustion deodorizing device and the operating method of the thermal storage combustion deodorizing device according to the present invention have excellent constructability due to their compact structure and can improve the decomposition efficiency of organic matter in the treated gas.

[0118] Explanation of symbols

[0119] 1: heat storage combustion deodorization device; 10: heat storage area; 11: heat storage chamber; 12: heat storage body; 13: partition plate; 20: air supply fan; 30: purification blower; 40: combustion chamber; 41: burner; 42: fuel opening and closing valve; 43: fuel supply path; 50: air supply flow path; 51: switching valve for air supply; 60: exhaust flow path; 61: switching valve for exhaust; 70: purification flow path; 71: switching valve for purification.

Claims

1. A heat storage combustion deodorization device, the heat storage combustion deodorization device comprising a combustion chamber and a heat storage area, the combustion chamber performs thermal decomposition of the treated gas; the heat storage area is composed of a plurality of heat storage chambers, the plurality of heat storage chambers are connected to the combustion chamber, and have a heat storage body inside, and are divided into n chambers (n is an integer greater than 5) in series by a partition plate in a tower, extending in the horizontal direction, wherein: A purification flow path, a gas supply flow path, and an exhaust flow path are respectively formed in a space continuously formed below the heat storage area. The purification flow path is connected to each heat storage chamber in the heat storage area, and its tip narrows downward, so as to purify the treated gas remaining in the heat storage area; the gas supply flow path is connected to the heat storage area on one side with the purification flow path sandwiched between the purification flow path in a direction orthogonal to the direction in which the heat storage chambers in the heat storage area are arranged, so as to supply the treated gas to the combustion chamber; the exhaust flow path is connected to each heat storage chamber in the heat storage area on the other side with the purification flow path sandwiched between the purification flow path, so as to discharge the exhaust gas heated and decomposed in the combustion chamber; The heat storage combustion deodorizing device includes a switching mechanism, and the switching mechanism performs switching control to a first group, a second group, and a third group in one operation process, wherein the first group is composed of a plurality of heat storage chambers in which the air supply path is in a connected state; the second group is composed of the same number of heat storage chambers as the first group in which the exhaust path is in a connected state, and the heat storage chambers are heat storage chambers different from the first group; and the third group is composed of a smaller number of heat storage chambers than the first group in which the purification path is in a connected state, and the heat storage chambers are heat storage chambers different from the first group and the second group.

2. The thermal storage combustion deodorization device according to claim 1, wherein: The first group and the second group are composed of (n-1) / 2 (n is an odd number greater than 5) heat storage chambers. The third group is composed of a single-chamber heat storage chamber.

3. The thermal storage combustion deodorization device according to claim 1 or 2, wherein: The switching control performed by the switching mechanism in the one operation step is to select a predetermined heat storage chamber that was connected to the air supply path in an operation step before the one operation step to be connected to the purge path.

4. The thermal storage combustion deodorization device according to claim 1 or 2, wherein: The switching control performed by the switching mechanism in the one operation step selects a predetermined heat storage chamber that communicated with the purge flow path in an operation step immediately before the one operation step as one of the heat storage chambers communicated with the exhaust flow path.

5. The thermal storage combustion deodorization device according to claim 1 or 2, wherein: The switching control performed by the switching mechanism in the one operation step selects a predetermined heat storage chamber connected to the exhaust flow path in an operation step before the one operation step as one of the heat storage chambers connected to the air supply flow path.

6. The thermal storage combustion deodorization device according to claim 1 or 2, wherein: The gas supply path has an air supply fan for supplying the gas to be processed. The purification flow path extracts exhaust gas from the combustion chamber and causes the exhaust gas to circulate toward the upstream side of the air supply fan.

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