JP3579176B2 - Thermal storage deodorization equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention directly combusts combustible harmful odor components contained in exhaust gas, or performs oxidative combustion or thermal decomposition in the presence of a catalyst to perform deodorization treatment, and recovers and reuses heat of high-temperature treated exhaust gas. The present invention relates to a thermal storage deodorizing device.
[0002]
[Prior art]
Paint, ink, solvent, etc. in various facilities such as painting booth, painting drying oven, printing drying oven, plastic and plywood manufacturing equipment, food processing equipment, industrial waste treatment equipment, digestive medicine manufacturing equipment or fragrance manufacturing equipment Combustible harmful odor components such as alcohols, esters, phenols and aldehydes having toxic and peculiar odors are generated from adhesives, adhesives, synthetic resins, and chemicals.
[0003]
Exhaust gas containing such harmful and odorous components cannot be released directly into the atmosphere from the viewpoint of pollution prevention. Therefore, the exhaust gas is usually deodorized and released in a non-toxic and deodorized state.
As a typical deodorizing treatment method, there is known a direct combustion method in which a harmful odor component in exhaust gas is oxidized and burned or thermally decomposed at a high temperature of 700 to 900 ° C. to change into carbon dioxide and water to make it odorless. . This has the advantage that the deodorizing effect is outstanding and is not inferior to any other deodorizing method, and it can be applied to combustible odor components in general, but on the other hand, the fuel consumption However, there is a disadvantage that the running cost is large and the running cost increases.
[0004]
Therefore, a heat storage type deodorizer that reduces the running cost by recovering the heat of the deodorized high-temperature treated exhaust gas, storing it, and effectively using it as a heat source to preheat the untreated exhaust gas when introducing it. A processing device has been proposed (see JP-A-5-332523 and JP-A-332524).
In order to further reduce the running cost, there has been proposed a catalytic thermal storage deodorizer in which flammable harmful odor components in exhaust gas are oxidized and burned or thermally decomposed at a relatively low temperature in the presence of a catalyst (Japanese Patent Laid-Open No. Hei 5 (1993)). -66005).
[0005]
FIG. 5 is a schematic explanatory view showing such a thermal storage deodorizing device, and the device has a flow path for introducing untreated exhaust gas into an exhaust gas treatment zone 30 for heating an exhaust gas to a predetermined temperature and performing a deodorizing treatment. Further, two heat storage zones 31A and 31B serving as exhaust gas channels for discharging the treated exhaust gas deodorized in the exhaust gas treatment zone 30 are provided in parallel.
The exhaust gas treatment zone 30 includes a heating chamber 37 provided with a heating device 36 such as a combustion burner, and catalyst layers 38 provided between the heating chamber 37 and the heat storage zones 31A and 31B. In the zones 31A and 31B, a heat storage layer 39 is formed so as to be continuous with the catalyst layer 38. On the opposite side of the heat storage layer 39 from the exhaust gas treatment zone 30, supply and discharge of untreated exhaust gas and treated exhaust gas are performed. Is formed.
[0006]
The supply / discharge chamber D includes untreated exhaust gas introduction ducts 33A and 33B branched from the untreated exhaust gas supply duct 32, treated exhaust gas discharge ducts 34A and 34B for discharging treated exhaust gas to the outside, and each heat storage zone 31A. , 31B, are connected to purge ducts 35A, 35B for returning to the exhaust gas supply duct 32 and returning to the other heat storage zones 31B, 31A for deodorization treatment, and the respective ducts 33A, 33B, 34A, 34B. , 35A, 35B are provided with automatic dampers 33a, 33b, 34a, 34b, 35a, 35b.
[0007]
Then, by automatically opening and closing the automatic dampers 33a and 33b interposed in the untreated exhaust gas introduction ducts 33A and 33B, the introduction direction of the untreated exhaust gas and the discharge direction of the treated exhaust gas are changed every predetermined time (for example, 60 seconds). Invert.
As a result, the untreated exhaust gas introduced from one heat storage zone 31A (31B) flows into the exhaust gas treatment zone 30, is heated in the heating chamber 37, and is then heated on the other heat storage zone 31B (31A). When the high-temperature treated exhaust gas is deodorized in the catalyst layer 38 and flows out of the heat storage zone 31B (31A), the heat is recovered in the heat storage layer 39.
When the introduction direction of the untreated exhaust gas and the discharge direction of the treated exhaust gas are reversed when 60 seconds have elapsed, the untreated exhaust gas is preheated by the recovered heat of the heat storage layer 39 of the heat storage zone 31B (31A), and the exhaust gas treatment is performed. Since it is introduced into the zone 30, by repeating this, the heat of the treated exhaust gas can be effectively recovered and reused, and the running cost can be reduced.
When the introduction / discharge direction of the untreated exhaust gas and the treated exhaust gas is reversed, the treated exhaust gas flows from the exhaust gas treatment zone 30 into the heat storage zone 31A (31B) into which the untreated exhaust gas has been introduced, and the heat storage Since the untreated exhaust gas remaining in the zone 31A is pushed out, the purge duct 35A (35B) is made conductive so that the exhaust gas is not discharged to the outside, and is temporarily returned to the heat storage zone 31B (31A) on the introduction side to be deodorized. After that, it is discharged to the outside.
[0008]
During use for a long period of time, the harmful odor components contained in the exhaust gas become dust and adhere to the untreated exhaust gas introduction side of the heat storage layer 39. For example, the odorous odor component adheres to the heat storage layer 39 on the heat storage zone 31A (31B) side. When removing the dust that has been removed, a circulation flow path is formed in which the purge duct 35A (35B) and the untreated exhaust gas introduction duct 33B (33A) are conducted to return the air flowing out of the heat storage zone 31A (31B) to the heat storage zone 31B. Then, flushing for removing the tarnish is performed by continuously circulating the heated air for about one hour.
[0009]
[Problems to be solved by the invention]
In this case, the heat is efficiently collected by the heat storage layer 39 when the high-heat treated exhaust gas flows out, and the untreated exhaust gas is efficiently recovered by the heat stored in the heat storage layer 39 when the untreated exhaust gas is introduced. For good preheating, it is necessary to form a uniform flow of untreated exhaust gas and treated exhaust gas.
However, three ducts of the untreated exhaust gas introduction ducts 33A and 33B, the treated exhaust gas exhaust ducts 34A and 34B, and the purge ducts 35A and 35B must be connected to the supply / discharge chamber D of each of the heat storage zones 31A and 31B. Therefore, there is a problem that the flow of the exhaust gas is biased depending on the connection position of each duct, so that thermal efficiency is reduced.
Further, if the flow of the exhaust gas is unbalanced, the tar is locally attached to the untreated exhaust gas introduction side of the heat storage layer 39, and if this is left unchecked, it also affects the deodorizing performance, so that flushing must be performed frequently, Even if the untreated exhaust gas remaining in the heat storage zones 31A, 31B is to be exhausted through the purge ducts 35A, 35B, there is a problem that the exhaust gas cannot be completely exhausted in a short time.
[0010]
In this case, if the supply / discharge chamber D is formed as a sufficiently large static pressure chamber and each duct is connected to this static pressure chamber, even if the connection position of the duct is slightly shifted, the flow of the exhaust gas will not be biased. Thus, a uniform flow can be obtained, but there is a problem that the apparatus becomes large.
Therefore, the present invention provides an untreated exhaust gas and a treated exhaust gas without forming a large static pressure chamber even when three ducts of an untreated exhaust gas introduction duct, a treated exhaust gas discharge duct, and a purge duct are connected to each heat storage zone. It is a technical problem to form a uniform flow in the heat storage zone.
[0011]
[Means for Solving the Problems]
In order to solve this problem, the present invention provides an exhaust gas treatment zone in which exhaust gas is heated to a predetermined temperature to perform deodorization treatment, and a plurality of heat storage zones serving as an introduction passage of an untreated exhaust gas and a discharge passage of a treated exhaust gas. In each of the heat storage zones, a heat storage layer that recovers the heat of the treated exhaust gas when discharging the treated exhaust gas and preheats the untreated exhaust gas when introducing the untreated exhaust gas is provided, and the heat storage layer is provided. On the opposite side of the exhaust gas treatment zone across the exhaust gas treatment zone, a supply / discharge chamber for supplying and discharging untreated exhaust gas and treated exhaust gas is formed, and in the supply / discharge chamber, an untreated exhaust gas introduction duct, a treated exhaust gas discharge duct, In a thermal storage and deodorization treatment apparatus connected with a purge duct for returning untreated exhaust gas remaining in each heat storage zone to another heat storage zone, the supply and discharge chamber has a supply and discharge chamber in which a number of ventilation holes are formed on a peripheral surface. A flow path is provided, and an untreated exhaust gas introduction duct is connected to one end of the supply / discharge flow path, and a treated exhaust gas discharge duct is connected to the other end or the one end side. Is provided with an exhaust passage having a large number of ventilation holes formed in a peripheral surface thereof, and the exhaust passage is connected to the purge duct.
[0012]
According to the present invention, a supply and discharge chamber for supplying and discharging untreated exhaust gas and treated exhaust gas formed on the opposite side to the exhaust gas treatment zone with the heat storage layer interposed therebetween has a supply and discharge chamber formed with a large number of ventilation holes on the peripheral surface. An exhaust passage is provided, and an untreated exhaust gas introduction duct and a treated exhaust gas exhaust duct are connected to both ends of the supply / exhaust passage, respectively. Since the exhaust duct is formed and the purge duct is connected to the exhaust duct, the three ducts can be opened at the same position with respect to the heat storage layer. There is no flow deviation due to the difference.
[0013]
When the untreated exhaust gas is introduced through the untreated exhaust gas introduction duct, the untreated exhaust gas is uniformly blown into the supply / discharge chamber from a ventilation hole formed on the peripheral surface of the supply / discharge flow path, and the treated exhaust gas discharge duct is provided. When the treated exhaust gas is discharged through the heat storage layer, the treated exhaust gas in the supply / discharge chamber that has passed through the heat storage layer is uniformly sucked from the vent formed around the supply / discharge flow path.
Further, when discharging the untreated exhaust gas remaining in the heat storage zone via the purge duct, the air inside the supply / discharge flow path is sucked from the air holes formed on the peripheral surface of the exhaust flow path, and thereby the supply / discharge flow path The air in the heat storage zone is uniformly sucked through the air supply / discharge chamber through the ventilation holes formed in the peripheral surface of the air conditioner.
In this way, a uniform flow is formed in the heat storage zone, so that the thermal efficiency is improved, there is no gas remaining when purging, and a dust is locally attached to the untreated exhaust gas introduction end side of the heat storage layer. The frequency of flushing is reduced.
[0014]
Further, since the exhaust passage connected with the purge duct is disposed inside the supply / exhaust passage connected with the untreated exhaust gas introduction duct and the treated exhaust gas exhaust duct, it can be installed in a small space. When a small amount of gas in the supply / discharge chamber is discharged through the purge duct, the gas passes through the ventilation holes formed in both the supply / discharge flow path and the exhaust flow path. Even though the gas flows uniformly in the chamber.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.
FIG. 1 is a perspective view showing a thermal storage deodorizing apparatus according to the present invention, FIG. 2 is a flow sheet thereof, and FIGS. 3 (a) to 3 (c) are explanatory views showing directions of introduction / discharge of exhaust gas in the deodorizing apparatus. FIGS. 4A to 4C are explanatory diagrams showing the flow of exhaust gas in the supply / discharge chamber.
[0016]
In the figure, reference numeral 1 denotes a thermal storage deodorizing apparatus for deoxidizing combustible harmful odor components contained in exhaust gas by oxidizing, burning or thermally decomposing them in the presence of a catalyst, and recovering and reusing heat of high-temperature treated exhaust gas. In the exhaust gas treatment zone 2 in which the exhaust gas is heated to a predetermined temperature to perform deodorization treatment, three heat storage zones 3A, 3B, 3C serving as an introduction passage of an untreated exhaust gas and a treated exhaust gas discharge passage are provided in parallel. Have been.
[0017]
The exhaust gas treatment zone 2 includes a heating chamber 5 provided with a heating device 4 such as a combustion burner, and a catalyst layer 6 disposed between the heating chamber 5 and each of the heat storage zones 3A to 3C and facing the heating chamber 5. In each of the heat storage zones 3A to 3C, there is provided a heat storage layer 7 for recovering the heat of the treated exhaust gas when discharging the treated exhaust gas and preheating the untreated exhaust gas when introducing the untreated exhaust gas. A supply / discharge chamber D for introducing untreated exhaust gas and discharging treated exhaust gas is formed on the opposite side of the exhaust gas treatment zone 2 across the exhaust gas treatment zone 7.
[0018]
In addition, each supply / discharge chamber D has untreated exhaust gas introduction ducts 8A to 8C for introducing untreated exhaust gas into the exhaust gas treatment zone 2 through the respective heat storage layers 7 and a deodorizing treatment in the exhaust gas exhaust passage 2 when the treated exhaust gas is discharged. The treated exhaust gas discharge ducts 9A to 9C for discharging the treated exhaust gas that has passed through the heat storage layer 7 and the untreated exhaust gas remaining in each of the heat storage zones 3A to 3C are discharged to the exhaust gas treatment zone 2 via the other heat storage zones 3A to 3C. Purge ducts 10A to 10C for introducing and deodorizing the air are connected to each of the ducts 8A to 8C, 9A to 9C, and 10A to 10C, with automatic dampers 8a to 8c, 9a to 9c, and 10a to 10c interposed therebetween. .
[0019]
In the supply / discharge chamber D, a rectifying member 15 having a double pipe structure including a large-diameter supply / discharge flow path 13 having a large number of ventilation holes 11 and 12 formed in a peripheral surface and a small-diameter exhaust flow path 14 is provided. The large-diameter supply / discharge flow path 13 penetrates through the supply / discharge chamber D and is disposed at the center of the lower end of the supply / discharge chamber D with the axial direction substantially parallel to the end surface of the heat storage layer 7. Untreated exhaust gas introduction ducts 8A to 8C are connected to one end side, and treated exhaust gas discharge ducts 9A to 9C are connected to the other end side. Purging ducts 10A to 10C having a relatively small air volume are provided in the small-diameter exhaust passage 14. Is connected.
[0020]
The untreated exhaust gas introduction ducts 8A to 8C are formed by branching from an exhaust gas supply duct 8 that supplies exhaust gas from an exhaust gas generation source, and a ventilation fan 16 is interposed in the exhaust gas supply duct 8. The purge ducts 10A to 10C are connected to the suction port side of the blower fan 16.
[0021]
The above is an example of the configuration of the present invention, and its operation will be described next.
First, when the untreated exhaust gas introduction duct 8A, the treated exhaust gas discharge duct 9B, and the purge duct 10C are made conductive, as shown in FIG. 3A, the untreated exhaust gas is introduced into the exhaust gas treatment zone 2 through the heat storage zone 3A. After being deodorized in the exhaust gas treatment zone 2, most of the exhaust gas is discharged through the heat storage zone 3B. At this time, the high-temperature treated exhaust gas deodorized in the exhaust gas treatment zone 2 is stored in the heat storage layer 7 of the heat storage zone 3B. As it passes through, the heat is recovered.
Further, since a part of the high-temperature treated exhaust gas deodorized in the exhaust gas treatment zone 2 flows into the heat storage zone 3C, the untreated exhaust gas remaining in the heat storage zone 3C is pressed out, passes through the heat storage zone 3A, and passes through the heat storage zone 3A. Reflux to 2 to deodorize.
[0022]
Next, after a lapse of a predetermined time (for example, 60 seconds), the ducts 8A, 9B, and 10C that have been conducting up to that time are shut off, and then the untreated exhaust gas introduction duct 8B, the treated exhaust gas discharge duct 9C, and the purge duct 10A are connected. When conducting, as shown in FIG. 3 (b), after the untreated exhaust gas is introduced into the exhaust gas treatment zone 2 through the heat storage zone 3B and deodorized, most of the exhaust gas is discharged through the heat storage zone 3C and Since a part of the gas flows into the heat storage zone 3A, the untreated exhaust gas remaining in the heat storage zone 3A is pressed out and returned to the exhaust gas treatment zone 2 through the heat storage zone 3B.
At this time, the untreated exhaust gas is introduced through the heat storage zone 3B from which the heat of the treated exhaust gas has been recovered, so that the untreated exhaust gas is preheated by the recovered heat of the heat storage layer 7 of the heat storage zone 3B and the exhaust gas heating zone 2 is introduced. Further, the untreated exhaust gas remaining in the heat storage zone 3A is returned to the heat storage zone 3B and purged, so that the untreated exhaust gas is not discharged to the outside.
[0023]
Further, after a lapse of a predetermined time (for example, 60 seconds), the ducts 8B, 9C, and 10A that have been conducting until then are shut off, and then the untreated exhaust gas introduction duct 8C, the treated exhaust gas discharge duct 9A, and the purge duct 10B are connected. When conducting, as shown in FIG. 3 (c), after the untreated exhaust gas is introduced into the exhaust gas treatment zone 2 through the heat storage zone 3C and deodorized, most of the exhaust gas is discharged through the heat storage zone 3A. A part thereof is returned from the heat storage zone 3B to the exhaust gas treatment zone 2 through the heat storage zone 3C.
Also in this case, similarly to the above, the untreated exhaust gas is preheated by the recovered heat of the heat storage layer 7 in the heat storage zone 3C, introduced into the exhaust gas heating zone 2, and the untreated exhaust gas remaining in the heat storage zone 3B is returned to the heat storage zone 3C. Is purged.
[0024]
When the untreated exhaust gas is introduced into the heat storage zones 3A to 3C, as shown in FIG. 4A, the untreated exhaust gas sent through the untreated exhaust gas introduction ducts 8A to 8C is supplied to the rectifying member. 15 is uniformly blown out from the ventilation holes 11 formed on the peripheral surface of the supply / discharge flow path 13 around the heat supply / discharge flow path 13, so that a uniform flow toward the end face of the heat storage layer 7 is formed in the supply / discharge chamber D. You.
Therefore, the untreated exhaust gas flows uniformly in the heat storage layer 7, is introduced into the exhaust gas treatment zone 2, and is efficiently preheated by the heat stored in the heat storage layer 7. In addition, since the untreated exhaust gas is not locally blown to the end face of the heat storage layer 7, the dust is prevented from being locally attached, and the flushing interval can be lengthened.
[0025]
On the other hand, when the treated exhaust gas is discharged from the heat storage zones 3A to 3C, as shown in FIG. 4B, the treated exhaust gas that has passed through the heat storage layer 7 is supplied and discharged through the exhaust gas discharge ducts 9A to 9C. Since the air is uniformly sucked from the vent holes 11 formed on the peripheral surface of the heat storage layer 13, a uniform flow from the end face of the heat storage layer 7 to the supply / discharge flow path 13 is formed. Therefore, the high-temperature treated exhaust gas flowing out of the exhaust gas treatment zone 2 flows uniformly in the heat storage layer 7 upstream thereof, and the heat is efficiently recovered by the heat storage layer 7.
[0026]
Further, when discharging the untreated exhaust gas remaining in the heat storage zones 3A to 3C, as shown in FIG. 4C, since the purge ducts 10A to 10C are connected to the small-diameter exhaust passage 14, the heat storage zones 3A to 3C are discharged. The untreated exhaust gas remaining in the 3C passes through the supply / discharge chamber D and is sucked into the supply / discharge flow path 13 through the ventilation hole 11 opened on the peripheral surface of the supply / discharge flow path 13 constituting the rectification member 15. Further, since the air is sucked into the exhaust flow passage 14 through the ventilation hole 12 opened in the peripheral surface of the exhaust flow passage 14 constituting the rectifying member 15, the heat is directed from the heat storage layer 7 to the peripheral surface of the exhaust flow passage 14. A uniform flow is formed. As described above, since the exhaust passage 14 is provided in the supply / discharge passage 13, the exhaust passage 14 can be installed in a narrow space, and can be installed in the supply / discharge chamber D via the purge ducts 10 </ b> A to 10 </ b> C. When the processing exhaust gas is discharged, the gas passes through the ventilation holes 11 and 12 formed in both the supply / discharge channel 13 and the exhaust channel 14, so that even if only a small amount is discharged, the chamber D The gas flows uniformly.
Therefore, the untreated exhaust gas remaining in the heat storage zones 3A to 3C can be reliably discharged, and the gas can be purged in a short time without generating any remaining gas.
[0027]
As described above, the untreated exhaust gas introduction ducts 8A to 8C, the treated exhaust gas introduction ducts 9A to 9C, and the purge ducts 10A to 10C are connected to one straightening member 15 disposed in the supply / discharge chamber D. Regardless of the duct through which the exhaust gas is introduced / exited, the flow of the exhaust gas in the heat storage layer 7 becomes uniform, and there is no need to provide a large static pressure chamber, so that the apparatus can be downsized.
[0028]
In the above description, the case where the heat storage and deodorization treatment apparatus 1 has the three-storage heat storage zones 3A to 3C is illustrated. However, the heat storage and deodorization treatment apparatus 1 is not limited to this, and the heat storage zones are provided above and below the exhaust gas treatment zone. It can also be applied to the formed single tower type.
Further, as the thermal storage and deodorizing treatment apparatus 1, the apparatus in which the catalyst layer 6 is disposed in the exhaust gas treatment zone 2 and the deodorizing treatment is performed by the catalytic oxidation method has been described. However, the present invention is not limited to this, and the present invention is not limited to using a catalyst. The deodorizing treatment may be performed by a direct combustion method of directly burning combustible harmful odor components contained in the treated exhaust gas.
Further, the heating device 4 disposed in the exhaust gas treatment zone 2 is not limited to a combustion burner, but may employ any heating means such as an electric heater or a ceramic heater.
[0029]
Furthermore, a case has been described in which a pipe having a semicircular cross section is used as the supply / discharge flow path 13 and a pipe having a circular cross section is used as the exhaust flow path 14. It may have a square shape or any other cross section. Further, as long as the exhaust passage is formed in the supply / discharge passage, it is not necessarily required to have a double pipe structure, and the structure is arbitrary. It may be a case where a partition wall is provided to form an exhaust passage.
[0030]
【The invention's effect】
As described above, according to the present invention, the supply / discharge chamber formed on the opposite side of the exhaust gas treatment zone across the heat storage layer is provided with a supply / discharge flow path having a large number of ventilation holes formed on a peripheral surface thereof. An untreated exhaust gas introduction duct and a treated exhaust gas discharge duct are connected to one end or both ends of the supply / discharge flow path, respectively, and an exhaust flow path having a number of ventilation holes formed in a peripheral surface in the supply / discharge flow path. Since the purge duct is connected to the exhaust passage, the three ducts can be connected in a narrow space so as to open at the same position with respect to the heat storage layer, and the difference in the mounting positions of the ducts can be reduced. Not only does not cause flow deviation, but also the exhaust gas flow is made uniform by a large number of ventilation holes formed in the peripheral surface of the supply and exhaust flow passage and the exhaust flow passage, and the untreated exhaust gas and the treated exhaust gas Flows uniformly in the heat storage layer. The tar does not adhere locally to the untreated exhaust gas introduction end, the thermal efficiency is improved, and even when the untreated exhaust gas is discharged through the purge duct, the gas is supplied to the supply / discharge passage and the exhaust passage. Since the gas passes through the ventilation holes formed on both sides, even if only a small amount is discharged, the gas flows uniformly in the supply / discharge chamber, and the untreated exhaust gas remaining in the heat storage zone is reliably discharged in a short time. It has a very good effect.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a thermal storage deodorizing apparatus according to the present invention.
FIG. 2 is a flow sheet thereof.
3 (a) to 3 (c) are explanatory views showing directions of introduction / discharge of exhaust gas in a deodorization treatment apparatus.
FIGS. 4A to 4C are explanatory views showing the flow of exhaust gas in a supply / discharge chamber.
FIG. 5 is a flow sheet showing a conventional apparatus.
[Explanation of symbols]
1 ··· Thermal deodorizing treatment device 2 ··· Exhaust gas treatment zones 3A to 3C · Thermal storage zone D ··· Supply / exhaust chamber 7 ··· Heat storage layers 8A to 8C: untreated exhaust gas introduction ducts 9A to 9C: treated exhaust gas discharge ducts 10A to 10C, purge ducts 11, 12, ... vent holes 13, supply and discharge Road 14 ... Exhaust flow path 15 ... Rectifying member

Claims (1)

A plurality of heat storage zones (3A to 3C) are provided side by side in an exhaust gas treatment zone (2) for heating an exhaust gas to a predetermined temperature to perform deodorization treatment, and serve as an introduction passage for an untreated exhaust gas and a discharge passage for a treated exhaust gas. Become
Each of the heat storage zones (3A to 3C) is provided with a heat storage layer (7) for recovering the heat of the treated exhaust gas when discharging the treated exhaust gas and preheating the untreated exhaust gas when introducing the untreated exhaust gas. On the opposite side of the exhaust gas treatment zone (2) across the heat storage layer (7), a supply / discharge chamber (D) for supplying / exhausting untreated exhaust gas and treated exhaust gas is formed,
In the supply / discharge chamber (D), the untreated exhaust gas introduction ducts (8A to 8C), the treated exhaust gas exhaust ducts (9A to 9C), and the untreated exhaust gas remaining in each heat storage zone (3A to 3C) are separated by another. In a thermal storage deodorizing treatment apparatus connected to a purge duct (10A to 10C) for reflux to a thermal storage zone (3A to 3C),
In the supply / discharge chamber (D), a supply / discharge flow path (13) having a large number of ventilation holes (11) formed in a peripheral surface is disposed, and an unprocessed end is provided on one end side of the supply / discharge flow path (13). An exhaust gas introduction duct (8A to 8C) is connected, and a treated exhaust gas exhaust duct (9A to 9C) is connected to the other end or the one end, and a peripheral surface is provided in the supply / exhaust flow path (13). An exhaust passage (14) having a large number of ventilation holes (12) formed therein, and the exhaust passage (14) is connected to the purge ducts (10A to 10C). apparatus.

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