JP3579189B2 - 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).
FIG.Fig. 1 shows such a conventional thermal storage deodorizing apparatus 50, in which thermal storage zones 53A, 53B having thermal storage layers 52A, 52B on both sides of an exhaust gas treatment zone 51 for heating and deodorizing untreated exhaust gas. Is formed. Further, untreated exhaust gas introduction ducts 55A and 55B provided with dampers 54A and 54B and treated exhaust gas discharge ducts 57A and 57B provided with dampers 56A and 56B are connected to the heat storage zones 53A and 53B, respectively. The exhaust gas introduction ducts 55A and 55B are connected to an exhaust gas generation source 60 via an exhaust gas supply duct 59 in which a blower fan 58 is interposed.
[0005]
Then, first, the untreated exhaust gas introduction duct 55A and the treated exhaust gas discharge duct 57B are made conductive, and then, this is shut off, and the untreated exhaust gas introduction duct 55B and the treated exhaust gas discharge duct 57A are made conductive. By repeating, the untreated exhaust gas introduced into the exhaust gas treatment zone 51 through one heat storage zone 53A (53B) is deodorized in the treatment zone 51, and the treated exhaust gas is discharged from the other heat storage zone 53B (53A). The flow direction of the exhaust gas to be generated is alternately switched at predetermined time intervals, so that the untreated exhaust gas generated in the exhaust gas generation source 60 is continuously deodorized.
[0006]
Thereby, the untreated exhaust gas introduced into the exhaust gas treatment zone 51 through the one heat storage zone 53A is heated and deodorized in the treatment zone 51, and the high-temperature treated exhaust gas is discharged through the heat storage zone 53B. When the heat is stored, the heat is recovered by the heat storage layer 52B. Then, for example, when the flow direction of the exhaust gas is reversed after elapse of 60 seconds, the untreated exhaust gas introduced into the exhaust gas treatment zone 51 through the heat storage zone 53B is preheated in the heat storage layer 52B. By alternately reversing the flow direction of the exhaust gas, the heat of the treated exhaust gas can be effectively used without wasting, the fuel consumption can be reduced, and the running cost can be reduced.
[0007]
However, when the flow direction of the exhaust gas passing through the heat storage zones 53A and 53B and the exhaust gas treatment zone 51 is reversed, the untreated exhaust gas is introduced into the heat storage zone 53A where the untreated exhaust gas has been introduced into the exhaust gas treatment zone 51 until now. Since the untreated exhaust gas introduced sometimes remains without being treated, the residual untreated exhaust gas is discharged to the outside as it is.
[0008]
Therefore, a purge duct 61 (which serves as a circulation flow path for recirculating the untreated exhaust gas discharged from one heat storage zone 53A (53B) through the other heat storage zone 53B (53A) into the exhaust gas treatment zone 51 for deodorization treatment). Each time the introduction direction of the exhaust gas is to be reversed, the untreated exhaust gas introduction ducts 55A and 55B and the treated exhaust gas discharge ducts 57A and 57B are shut off and discharged by the purge duct 61. A purge operation for circulating the remaining untreated exhaust gas in the heat storage zone 53B (53A) on the side and performing deodorizing treatment is performed (see Japanese Patent Application Laid-Open No. 5-66005).
According to this, when the flow direction of the exhaust gas is reversed, the residual untreated exhaust gas in the heat storage zone 53A (53B) on the discharge side is returned to the heat storage zone 53B (53A) on the introduction side through the purge duct 61 to be deodorized. Therefore, the untreated exhaust gas does not flow out as it is.
[0009]
[Problems to be solved by the invention]
However, as described above, when performing a purge operation in a simple and compact thermal storage and deodorization treatment apparatus in which only two thermal storage zones are formed, the untreated exhaust gas introduction duct is formed due to the formation of a circulation flow path by the purge duct 61. 55A and 55B and the treated exhaust gas outflow ducts 57A and 57B must be shut off, and meanwhile, the untreated exhaust gas supplied from the exhaust gas generation source 60 is introduced into the exhaust gas treatment zone 51 for continuous treatment. Therefore, there is a problem that the load on the exhaust gas discharge side of the exhaust gas generation source 60 fluctuates extremely each time.
For example, when the drying furnace for coating is the exhaust gas generation source 60 and the load on the exhaust gas discharge side fluctuates extremely, the flow of hot air in the drying furnace and the furnace temperature cannot be maintained constant, and the coating quality cannot be maintained. In addition to the adverse effects, contaminated air in the furnace may leak out of the furnace, or may be introduced into a coating booth connected to the drying furnace to stain the coating film.
[0010]
For this reason, three or more heat storage zones are formed, and the untreated exhaust gas is introduced through one of the heat storage zones, and the untreated exhaust gas is discharged through the other one heat storage zone. A purge operation is performed by refluxing the treated exhaust gas to the heat storage zone on the introduction side, and the exhaust gas sent from the exhaust gas generation source 60 can be continuously treated by repeating the purge operation sequentially. In this case, Since the equipment becomes large and the equipment cost increases, it cannot be introduced into a factory where the installation space is limited or a small or medium-sized factory where a large amount of equipment investment cannot be made.
[0011]
Accordingly, the present invention provides a two-column thermal storage deodorizing apparatus in which heat storage zones are formed on both sides of an exhaust gas processing zone in which untreated exhaust gas is heated and deodorized, and the flow direction of the exhaust gas is reversed. Without interrupting the supply of untreated exhaust gas from the source, it is possible to purge the untreated exhaust gas in the deodorization processing chamber so as not to flow outside, and at the same time, it was supplied from the exhaust gas source while purging. A technical problem is to make it possible to continuously deodorize untreated exhaust gas.
[0012]
[Means for Solving the Problems]
In order to solve this problem, the present invention has a heat storage zone having a heat storage layer formed on both sides of an exhaust gas treatment zone for heating and deodorizing untreated exhaust gas, and an exhaust gas treatment zone through one heat storage zone. The untreated exhaust gas introduced into the treatment zone is deodorized in the treatment zone, and the treated exhaust gas is supplied from the exhaust gas source by reversing the flow direction of the exhaust gas discharged to the outside through the other heat storage zone at predetermined time intervals. In a thermal storage deodorization treatment device for continuously deodorizing untreated exhaust gas, an untreated exhaust gas introduction duct for alternately introducing untreated exhaust gas to each of the heat storage zones has two or more paths for supplying exhaust gas at a predetermined air volume ratio. Is connected to the exhaust gas generation source via the exhaust gas supply duct formed at the same time, and the remaining heat is stored from the heat storage zone on the discharge side when the flow direction of the exhaust gas is reversed. A purge duct for discharging the untreated exhaust gas is connected to one path of the exhaust gas supply duct via an air reservoir for temporarily storing the untreated exhaust gas, and the one path is used for generating the exhaust gas through a flow path switching unit. Source and the air reservoir, and when the flow direction of the exhaust gas flowing in each heat storage zone and the exhaust gas treatment zone is reversed, each path of the exhaust gas supply duct is connected to the exhaust gas generation source. While supplying the untreated exhaust gas to the heat storage zone on the introduction side while conducting the untreated exhaust gas, the remaining untreated exhaust gas discharged from the heat storage zone on the discharge side is stored in the air reservoir. It is characterized in that it is configured to communicate with one path of the exhaust gas supply duct.
[0013]
According to the present invention, an exhaust gas supply duct connecting an exhaust gas generation source and each untreated exhaust gas introduction duct is formed of two or more paths for supplying exhaust gas at a predetermined flow rate ratio, for example, two paths. 50m capacity of blower fan³/ Min, and when the flow ratio of one path to which the purge duct is connected and the other path to which the purge duct is not connected is 1: 4, 10 m is applied to one path.³/ Min, exhaust gas flows, and 40 m on the other path³/ Min exhaust gas flows, a total of 50 m from the exhaust gas generation source³/ Min untreated exhaust gas is introduced into the exhaust gas treatment zone through one heat storage zone, where it is deodorized, and the treated exhaust gas is discharged to the outside through the other heat storage zone.
[0014]
Here, when the flow direction of the exhaust gas flowing through each heat storage zone and the exhaust gas treatment zone is reversed, the heat storage zone into which the untreated exhaust gas has been introduced becomes the discharge side, and the treated exhaust gas that has been deodorized in the exhaust gas treatment zone is discharged. , Is discharged through its heat storage zone. Then, immediately after the reversal, the untreated exhaust gas remaining in the heat storage zone is pressed out by the treated exhaust gas, so first, the untreated exhaust gas is temporarily stored in the air reservoir via the purge duct, and thereafter, Discharge treated exhaust gas to the outside.
[0015]
At the same time as starting to discharge the treated exhaust gas to the outside, when one of the paths of the exhaust gas supply duct is communicated with the air reservoir by the flow path switching means, the one path has a distance of 10 m from the exhaust gas generation source until then.³Since the exhaust gas was flowing at a flow rate of / min, the untreated exhaust gas in the air reservoir was efficiently and quickly sucked out by the inertial force and sent to the exhaust gas treatment zone through the heat storage zone on the introduction side.
[0016]
During this time, the untreated exhaust gas is 40 m from the exhaust gas generation source via the other path of the exhaust gas supply duct.³/ Min is continuously fed at a flow rate of / min, so that the deodorizing treatment is not interrupted when the flow direction of the exhaust gas is reversed, and the untreated exhaust gas can be continuously deodorized in the exhaust gas treatment zone. . The untreated exhaust gas sent from the exhaust gas generation source is 40 m only while the untreated exhaust gas is recirculated from the air reservoir through the reflux duct.³/ Min, but the untreated exhaust gas stored in the air reservoir is discharged in a short time and immediately³/ Min, the load of the exhaust gas from the exhaust gas generation source does not fluctuate significantly. Thus, even when purging the heat storage zone in a simple and compact heat storage deodorizing apparatus in which only two heat storage zones are formed, there is no need to interrupt the deodorization processing of the untreated exhaust gas sent from the exhaust gas generation source. It can be continuously deodorized.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a flow sheet showing an example of a thermal storage deodorizing apparatus according to the present invention, FIG. 2 is a time chart showing an operation procedure thereof, and FIG. 3 is a time chart showing an operation procedure of another embodiment.Atis there.
[0018]
In the figure, reference numeral 1 denotes a catalytic thermal storage deodorizing apparatus for deodorizing flammable and odorous components contained in exhaust gas sent from an exhaust gas generation source 2 by oxidizing and burning or thermally decomposing them in the presence of a catalyst, Heat storage zones 5A and 5B having heat storage layers 4A and 4B are formed on both sides of an exhaust gas treatment zone 3 in which untreated exhaust gas is heated and deodorized.
[0019]
The exhaust gas treatment zone 3 is disposed between a heating chamber 7 in which a heating device 6 having a main burner and a pilot burner is disposed, and the heat storage zones 5A and 5B facing the heating chamber 7. It consists of catalyst layers 8,8. Reference numerals 6a and 6b denote a fuel pipe for supplying the main burner LNG and pilot burner LNG to the heating device 6, 6c a combustion air supply duct, and 6d a heating chamber cooling air supply duct.
[0020]
Untreated exhaust gas introduction ducts 10A and 10B provided with automatic dampers 9A and 9B, and treated exhaust gas discharge ducts 12A and 12B provided with automatic dampers 11A and 11B are connected to the heat storage zones 5A and 5B, respectively. By switching the untreated exhaust gas introduction ducts 10A and 10B alternately, the untreated exhaust gas introduced into the exhaust gas treatment zone 3 through one of the heat storage zones 5A and 5B is deodorized in the treatment zone 3 and the treated exhaust gas is treated. The flow direction of the exhaust gas that discharges the exhaust gas to the outside through the other heat storage zones 5B and 5A is reversed every predetermined time, and the untreated exhaust gas supplied from the exhaust gas generation source is continuously deodorized. I have.
[0021]
The untreated exhaust gas introduction ducts 10A and 10B are connected to the exhaust gas generation source 2 via an exhaust gas supply duct 14 in which a blower fan 13 is interposed, and the exhaust gas supply duct 14 A space between the mouth and the exhaust gas generation source 2 is formed by two paths 15A and 15B for supplying the exhaust gas at a predetermined air volume ratio (for example, 1: 4). An air reservoir 16 collects and temporarily stores residual untreated exhaust gas remaining in each of the heat storage zones 5A and 5B, and is provided through purge ducts 18A and 18B provided with automatic dampers 17A and 17B. A recirculation duct 19 connected to each of the heat storage zones 5A and 5B and for recirculating the untreated exhaust gas stored in the air reservoir 16 is connected to one path 15A of the exhaust gas supply duct 14.
[0022]
Further, since the reflux duct 19 is connected to one path 15A of the exhaust gas supply duct 14, exhaust gas flows from both the exhaust gas generation source 2 and the air reservoir 16 into the one path 15A, An automatic damper (flow path switching means) 20 for switching the flow path, which selectively connects these, is interposed. By opening and closing the automatic dampers 9A, 9B, 11A, 11B, 17A, 17B at a predetermined timing, the flow direction of the exhaust gas flowing in the heat storage zones 5A, 5B and the exhaust gas treatment zone 3 is reversed. At this time, while the respective paths 15A, 15B of the exhaust gas supply duct 14 are connected to the exhaust gas generation source 2 to supply the untreated exhaust gas to the heat storage zones 5A, 5B on the introduction side, the heat storage zone 5B, After storing the remaining untreated exhaust gas discharged from the inside of the air reservoir 5 in the air reservoir 16, the air reservoir 16 and the one path 15 </ b> A of the exhaust gas supply duct 14 are communicated by the flow path switching auto damper 20. ing.
[0023]
The above is an example of the configuration of the present invention. Next, the operation will be described with reference to the time chart of FIG. For example, 50 m from the drying oven for coating which is the exhaust gas generation source 2³/ Min when processing exhaust gas continuously discharged at an air flow rate of 50 m / min.³/ Min, and the air flow ratio of each of the paths 15A and 15B of the exhaust gas supply duct 14 is set to 1: 4.
[0024]
When the operation of the deodorizing treatment device 1 is started, the automatic dampers 9A, 9B interposed in the untreated exhaust gas introduction ducts 10A, 10B are alternately opened and closed, and the heat storage zones 5A, 5B and the exhaust gas treatment zone 3 The flow direction of the exhaust gas is reversed every predetermined time (for example, 60 seconds), and the heat storage zone 5A (5B) on the introduction side and the heat storage zone 5B (5A) on the discharge side are alternately switched (FIG. 2: T).₂₀).
Accordingly, the flow direction of the exhaust gas is reversed each time the untreated exhaust gas introduction ducts 10A and 10B are switched, and the heat storage zone 5B (5A) into which the untreated exhaust gas has been introduced becomes the discharge side, and the treated exhaust gas is discharged. The stored heat storage zone 5A (5B) becomes the introduction side.
[0025]
Then, for example, when the automatic damper 9A (9B) is opened and the untreated exhaust gas introduction duct 10A (10B) connected to one of the heat storage zones 5A (5B) is conducted, first, the automatic damper 11B (11A) is disconnected. With the closed exhaust gas discharge duct 12B (12A) closed, the auto damper 17B (17A) interposed in the purge duct 18B (18A) is opened for about 5 seconds, and the other heat storage zone 5B (discharge side) is opened. 5A) is stored in the air reservoir 16 (FIG. 2: T).₂₀~ T₂₁).
[0026]
The time for conducting the purge duct 18B (18A) is not limited to 5 seconds, and a time until the concentration of the residual untreated exhaust gas discharged from the heat storage zone 5B (5A) falls to a certain level is selected. .
Also, during this time, one path 15A of the exhaust gas supply duct 14 is connected to the exhaust gas generation source 2 by the auto damper 20, so that each of the paths 15A and 15B of the exhaust gas supply duct 14 from the exhaust gas generation source 2 respectively. 10m³/ Min, 40m³/ Min exhaust gas flows at a rate of 50 m / min.³/ Min, the untreated exhaust gas is supplied to the heat storage zone 5A (5B) on the introduction side.
[0027]
Next, when 5 seconds have elapsed (FIG. 2: T₂₁), The automatic damper 17B (17A) is closed, the purge duct 18B (18A) is shut off, and the automatic damper 11B (11A) is opened and processed for 55 seconds until the untreated exhaust gas introduction duct 10A (10B) is shut off. The exhaust gas discharge duct 12B (12A) is made conductive.
At the same time, by operating the automatic damper 20 to connect one path 15A of the exhaust gas supply duct 14 to the air reservoir 16 via the recirculation duct 19, the one path 15A 2 to 10m³Since the exhaust gas was flowing at an air flow rate of / min, the dynamic pressure was applied, and the untreated exhaust gas in the air reservoir 16 was quickly and vigorously sucked out through the recirculation duct 19 (FIG. 2: T).₂₁~ T₂₂).
[0028]
As a result, the residual untreated exhaust gas temporarily stored in the air reservoir 16 is sent to the suction side of the blower fan 13 via the recirculation duct 19, and from the exhaust gas source 2 to the other path 15 B of the exhaust gas supply duct 14. Along with the untreated exhaust gas sent through the exhaust gas introduction duct 10A (10B), it is introduced into the heat storage zone 5A (5B) on the introduction side via the untreated exhaust gas introduction duct 10A (10B). The exhaust gas is discharged to the outside from the heat storage zone 5B (5A) on the outflow side.
[0029]
During this time (Fig. 2: T₂₁~ T₂₂), Since one path 15A of the exhaust gas supply duct 14 from the exhaust gas source 2 is communicated with the air reservoir 16 side, 40 m from the exhaust gas source 2 through the other path 15B.³/ Min, the untreated exhaust gas is supplied at an air flow rate of / min, and the amount of air supplied from the exhaust gas generation source 2 is temporarily reduced. However, the untreated exhaust gas can be discharged from the air reservoir 16 in a short time. The load of the exhaust gas at the source does not fluctuate significantly.
[0030]
Then, when the untreated exhaust gas in the air reservoir 16 is discharged, the automatic damper 20 for switching the flow path is operated again, and one path 15A of the exhaust gas supply duct 14 is communicated with the exhaust gas generation source 2 to generate the exhaust gas. 10 m from each of the paths 15A and 15B of the exhaust gas supply duct 14 from the source 2³/ Min, 40m³/ Min exhaust gas flows at a rate of 50 m / min.³/ Min is supplied to the heat storage zone 5A on the introduction side at a rate of / min (FIG. 2: T₂₂~ T₂₃(T₂₀)).
[0031]
The untreated exhaust gas introduced into the heat storage zone 5A (5B) is first preheated in the heat storage layer 4 and then introduced into the heating chamber 7, where it is subjected to the catalytic combustion temperature (for example, 350 to 400 ° C.) by the combustion device 6. The catalyst layer 8 facing the heat storage zone 5B (5A) on the outflow side is oxidized and burned or thermally decomposed to be deodorized.
At this time, since the reaction heat is generated, the temperature of the treated exhaust gas becomes considerably high, and when the treated exhaust gas is discharged from the treated exhaust gas discharge duct 12B (12A) through the heat storage zone 5B (5A), the temperature of the treated exhaust gas increases. Heat is recovered in the heat storage layer 4B (4A).
[0032]
Then, when 60 seconds have elapsed, the untreated exhaust gas introduction ducts 10A and 10B are switched to reverse the flow direction of the exhaust gas in each of the heat storage zones 5A and 5B and the exhaust gas treatment zone 3, and the exhaust gas is introduced through the heat storage zone 5B. After the untreated exhaust gas is preheated by the heat of the heat storage layer 4B, it is sent to the exhaust gas treatment zone 3 and deodorized, so that the exhaust gas can be effectively used to save the fuel gas supplied to the combustion device 6. .
In addition, since the treated exhaust gas presses out the remaining untreated exhaust gas remaining in the heat storage zone 5A, the untreated exhaust gas is collected in the air reservoir 16 through the purge duct 18A and then is transferred to the introduction side heat storage zone 5B. The exhaust gas generated in the exhaust gas generation source 2 is continuously deodorized by refluxing.
[0033]
In the above description, when the untreated exhaust gas introduction ducts 10A and 10B are switched to reverse the flow direction of the exhaust gas in each of the heat storage zones 5A and 5B and the exhaust gas treatment zone 3, the heat storage zone on the discharge side is obtained. Although the case where the untreated exhaust gas discharged from 5B, 5A is temporarily stored in the air reservoir 16 and then returned to the heat storage zones 5A, 5B on the introduction side has been described, as shown by the broken line 21 in FIG. The purge ducts 18A and 18B may be directly connected to one path 15A of the exhaust gas supply duct 14.
Then, for example, 50 m from the coating drying furnace serving as the exhaust gas generation source 2³/ Min when processing exhaust gas continuously discharged at an air flow rate of 50 m / min.³/ Min, and the air flow ratio of each of the paths 15A and 15B of the exhaust gas supply duct 14 is set to 1: 4.
[0034]
FIG. 3 is a time chart showing the operation of such a thermal storage deodorizing treatment apparatus. In this example, the untreated exhaust gas introduction ducts 10A and 10B are switched so that the exhaust gas in each of the thermal storage zones 5A and 5B and the exhaust gas treatment zone 3 is changed. When the flow direction is reversed, while the remaining untreated exhaust gas is discharged from the heat storage zone 5B (5A) on the discharge side via the purge duct 18B (18A), the automatic damper 20 for switching the flow path is operated. First, the purge duct 18B (18A) is communicated with one path 15A of the exhaust gas supply duct 14 (FIG. 3: T₃₀~ T₃₁).
[0035]
Until then, one path 15A of the exhaust gas supply duct 14 is 10 m from the exhaust gas generation source 2.³Since the exhaust gas was flowing at an air flow rate of / min, the dynamic pressure of the exhaust gas that had flown so far acts when the flow path is switched by operating the flow path switching auto damper 20, and the purge duct 18B (18A) ), The untreated exhaust gas is vigorously sucked out of the heat storage zone 5B (5A) on the discharge side in a short time.
As a result, the residual untreated exhaust gas discharged from the heat storage zone 5B (5A) on the discharge side is supplied to the suction side of the blower fan 13 via one path 15A of the supply duct 14, and the exhaust gas is transmitted from the exhaust gas generation source 2 to the exhaust gas supply source 2. Along with the untreated exhaust gas sent through the other path 15B of the supply duct 14, the untreated exhaust gas is sent to the introduction-side heat storage zone 5A (5B) through the untreated exhaust gas introduction duct 10A (10B), and the exhaust gas treatment is performed. After being deodorized in the zone 3, the treated exhaust gas is discharged to the outside from the heat storage zone 5B (5A) on the outflow side.
[0036]
During this time, the flow path from the exhaust gas generation source 2 to the blower fan 13 via the other path 15B of the exhaust gas supply duct 14 is maintained in a conductive state, and the flow rate ratio of the paths 15A and 15B is 1: 4. 40 m from the exhaust gas generation source 2³The exhaust gas is sucked in at an air flow rate of / min, and the deodorizing treatment can be continuously performed only by temporarily decreasing the exhaust gas processing air flow. In addition, while purging is performed in this manner (FIG. 3: T₃₀~ T₃₁), The heat storage zone 5A (5B) on the introduction side passes through each of the paths 15A and 15B of the exhaust gas supply duct 14 for a total of 50 m.³The exhaust gas is introduced at an air flow rate of / min, but the inertia force of the exhaust gas flowing before the flow direction of the exhaust gas is reversed and the heat storage layers 4A and 4B disposed in the thermal storage and deodorization treatment device 1. Due to the pressure loss of the catalyst layer 8 and the catalyst layer 8, there is a time lag before the air is discharged from the discharge side, and the amount of untreated exhaust gas discharged by the purge is at most 2-3 m.³ Therefore, it is sufficient to perform the purge during that time, and the processing air volume of the exhaust gas generated in the exhaust gas generation source 2 does not significantly fluctuate.
[0037]
Then, the purge is completed (FIG. 3: T₃₁), When the concentration of the untreated exhaust gas discharged from the heat storage zone 5B (5A) drops to a predetermined level, the flow path switching automatic damper 20 is operated to operate the flow from the exhaust gas generation source 2 to the blower fan 13; At the same time as the passage is conducted, if the passage from each purge duct 18B (18A) to the blower fan 13 is shut off, a total of 50 m from the exhaust gas generation source 2 through each of the paths 15A and 15B of the exhaust gas blower duct 14 is provided.³Exhaust gas at a flow rate of / minReamIt can be continuously deodorized (Fig. 3: T₃₁~ T₃₂(T₃₀)).
[0038]
【The invention's effect】
As described above, according to the present invention, while continuously feeding untreated exhaust gas from an exhaust gas generation source, when the flow direction of exhaust gas flowing in each heat storage zone and the exhaust gas treatment zone is reversed, The untreated exhaust gas discharged from the heat storage zone is stored in the air reservoir, and then the untreated exhaust gas stored in the air reservoir is sent to the introduction-side heat storage zone together with the untreated exhaust gas sent from the exhaust gas generation source. Thus, there is an effect that the untreated exhaust gas sent from the exhaust gas generation source can be continuously deodorized while the heat storage zone on the discharge side is being purged.
Also, an exhaust gas supply duct connecting the exhaust gas source and the suction port of the blower fan is formed of two paths having a predetermined air volume ratio, and one of the paths is selectively communicated with the exhaust gas source and the air reservoir. While passing each path of the exhaust gas supply duct to the exhaust gas generation source to supply the untreated exhaust gas to the heat storage zone on the introduction side, the remaining air discharged from the heat storage zone on the discharge side is formed. After storing the treated exhaust gas in the air reservoir, by connecting the air reservoir with one path of the exhaust gas supply duct, the dynamic pressure of the untreated exhaust gas that had been flowing in the flow path from the exhaust gas generation source to the blower fan until then Acts, the untreated exhaust gas in the air reservoir is vigorously sucked out in a short period of time, and the untreated exhaust gas can be efficiently recirculated. It has a very excellent effect that the door can be.
[Brief description of the drawings]
FIG. 1 is a flow sheet showing a deodorizing treatment device according to the present invention.
FIG. 2 is a time chart showing the operation order.
FIG. 3 is a time chart showing an operation order of another embodiment.
FIG. 4 is a flow sheet showing a conventional deodorizing apparatus.
[Explanation of symbols]
1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Heat storage deodorization equipment
2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Emission source
3 ... Exhaust gas treatment zone
4A, 4B ... heat storage layer
5A, 5B · · · · heat storage zone
6 ····· Heating device
7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Heating room
8 ... Catalyst layer
10A, 10B ... untreated exhaust gas introduction duct
12A, 12B ... treated exhaust gas discharge duct
13 ・ ・ ・ ・ ・ ・ ・ Blower fan
14 ・ ・ ・ ・ ・ ・ ・ ・ ・ Exhaust gas supply duct
15A, 15B ... path
16. Air reservoir
18A, 18B: purge duct
19 ······ Reflux duct
20 ... Automatic damper for channel switching (channel switching means)

Claims (2)

Heat storage zones (5A, 5B) having heat storage layers (4A, 4B) are formed on both sides of an exhaust gas treatment zone (3) for heating and deodorizing untreated exhaust gas. 5B) The untreated exhaust gas introduced into the exhaust gas treatment zone (3) through the treatment zone (3) is deodorized and the treated exhaust gas is discharged to the outside through the other heat storage zones (5B, 5A). In a thermal storage deodorization processing device that reverses the direction at predetermined time intervals and continuously deodorizes untreated exhaust gas sent from an exhaust gas generation source (2),
An untreated exhaust gas introduction duct (10A, 10B) for alternately introducing untreated exhaust gas into each of the heat storage zones (5A, 5B) is formed by two or more paths (15A, 15B) for supplying exhaust gas at a predetermined air volume ratio. And a residual untreated exhaust gas from a heat storage zone (5B, 5A) that is connected to an exhaust gas generation source (2) via a discharged exhaust gas supply duct (14) and that is on the discharge side when the flow direction of the exhaust gas is reversed. A purge duct (18A, 18B) for discharging air is connected to one path (15A) of the exhaust gas supply duct (14) through an air reservoir (16) for temporarily storing the untreated exhaust gas, and the one path is connected to the one path. (15A) is selectively connected to the exhaust gas generation source (2) and the air reservoir (16) via a flow path switching means (20), and each of the heat storage zones (5A, 5B) and the exhaust When the flow direction of the exhaust gas flowing in the wastewater treatment zone (3) is reversed, each path (15A, 15B) of the exhaust gas supply duct (14) is conducted to the exhaust gas generation source (2), and the untreated exhaust gas is discharged. While supplying unreacted exhaust gas discharged from the heat storage zones (5B, 5A) on the discharge side to the air reservoir (16) while feeding the air to the heat storage zones (5A, 5B) on the introduction side, A heat storage deodorization apparatus characterized in that the switching means (20) allows the air reservoir (16) to communicate with the one path (15A) of the exhaust gas supply duct (14). Heat storage zones (5A, 5B) having heat storage layers (4A, 4B) are formed on both sides of an exhaust gas treatment zone (3) for heating and deodorizing untreated exhaust gas. 5B) The untreated exhaust gas introduced into the exhaust gas treatment zone (3) through the treatment zone (3) is deodorized and the treated exhaust gas is discharged to the outside through the other heat storage zones (5B, 5A). In a thermal storage deodorization processing device that reverses the direction at predetermined time intervals and continuously deodorizes untreated exhaust gas sent from an exhaust gas generation source (2),
An untreated exhaust gas introduction duct (10A, 10B) for alternately introducing untreated exhaust gas into each of the heat storage zones (5A, 5B) is formed by two or more paths (15A, 15B) for supplying exhaust gas at a predetermined air volume ratio. And a residual untreated exhaust gas from a heat storage zone (5B, 5A) that is connected to an exhaust gas generation source (2) via a discharged exhaust gas supply duct (14) and that is on the discharge side when the flow direction of the exhaust gas is reversed. A purge duct (18A, 18B) for discharging the exhaust gas is connected to one path (15A) of the exhaust gas supply duct (14), and the one path (15A) is connected to the exhaust gas generation means via a flow path switching means (20). A source (2) and each of the purge ducts (18A, 18B) are selectively connected to each other, and each path (15A, 15B) of the exhaust gas supply duct (14) is connected to an exhaust gas generation source (2). Continuity When the flow direction of the exhaust gas flowing through each of the heat storage zones (5A, 5B) and the exhaust gas treatment zone (3) is reversed while feeding the untreated exhaust gas to the heat storage zones (5A, 5B) on the introduction side, The purge ducts (18A, 18B) connected to the heat storage zones (5A, 5B) on the discharge side by the flow path switching means (20) communicate with one path (15A) of the exhaust gas supply duct (14). A thermal storage and deodorization treatment apparatus characterized in that:

Images