JP3673010B2 - Thermal storage deodorization treatment device - Google Patents

Description

[0001]
The present invention directly burns flammable harmful odor components contained in exhaust gas, or performs deodorization treatment by oxidation combustion or thermal decomposition in the presence of a catalyst, and recovers and reuses heat of high-temperature treated exhaust gas. The present invention relates to a heat storage deodorizing apparatus.
[0002]
[Prior art]
In various facilities such as painting booths, painting drying ovens, printing drying ovens, plastic and plywood production facilities, food processing facilities, industrial waste treatment facilities, digestive agent production facilities, and fragrance production facilities, paints, inks, solvents Combustible harmful odorous components such as alcohols, esters, phenols and aldehydes having toxic and specific odors are generated from adhesives, synthetic resins, or chemicals.
[0003]
And since the exhaust gas containing such a bad odor component cannot be directly released into the atmosphere from the viewpoint of pollution prevention, it is usually released in a non-toxic and non-brominated state by performing a deodorizing process.
As a typical deodorizing treatment method, a direct combustion method is known in which harmful malodorous components in exhaust gas are oxidized and / or thermally decomposed at a high temperature of 700 to 900 ° C. to change them into carbon dioxide gas and water and are not brominated. . This is an excellent deodorizing effect and is not inferior to any other deodorizing method, and has the advantage of being generally applicable to flammable odor components, but on the other hand, fuel consumption However, there is a disadvantage that running cost increases.
[0004]
Therefore, heat storage type deodorization that reduces the running cost by recovering the heat of the deodorized high-temperature treated exhaust gas and storing it, and effectively using it as a heat source for preheating when the untreated exhaust gas is introduced Processing apparatuses have been proposed (see JP-A-5-332523 and JP-A-3332524).
As shown in FIG. 5, the untreated exhaust gas is heated in the deodorizing treatment chamber 50 which becomes an exhaust gas flow path for introducing the untreated exhaust gas from the introduction end side and discharging the treated exhaust gas from the outflow end side. An exhaust gas treatment zone 51 to be processed is formed, and heat storage zones 53A and 53B having heat storage layers 52A and 52B are formed on the upstream side and the downstream side of the exhaust gas treatment zone 51, respectively.
In each of the heat storage zones 53A and 53B, untreated exhaust gas introduction ducts 56A and 56B provided with dampers 54A, 54B, 55A and 55B for reversing the flow direction of the exhaust gas in the deodorizing treatment chamber 50 every predetermined time, and the treated exhaust gas exhaust. Ducts 57A and 57B are connected to each other.
[0005]
Then, first, the untreated exhaust gas introduction duct 56A and the treated exhaust gas exhaust duct 57B are made conductive, then this is cut off, and the untreated exhaust gas introduction duct 56B and the treated exhaust gas exhaust duct 57A are made conductive, alternately. By repeating, the untreated exhaust gas is introduced into the exhaust gas treatment zone 51 through one heat storage zone 53A (53B) and deodorized, and the flow direction of the exhaust gas for discharging the treated exhaust gas from the other heat storage zone 53B (53A) is changed. The deodorizing process is continuously performed by alternately switching at predetermined time intervals.
[0006]
Thereby, the untreated exhaust gas introduced into the deodorization treatment chamber 50 from the one heat storage zone 53A side is heated in the exhaust gas treatment zone 51 to be deodorized, and the high temperature treated exhaust gas is discharged through the heat storage zone 53B. When the heat storage layer 52B recovers the heat and, for example, when the flow direction of the exhaust gas is reversed after 60 seconds, untreated exhaust gas passing through the heat storage zone 53B is preheated in the heat storage layer 52B. Therefore, by repeating this alternately, it is possible to effectively use the heat of the treated exhaust gas without wasting it, thereby reducing the fuel consumption and reducing the running cost. .
[0007]
However, the untreated exhaust gas introduced through the heat storage zone 53A is deodorized in the exhaust gas treatment zone 51, the treated exhaust gas is discharged through the heat storage zone 53B, and then the flow direction of the exhaust gas is reversed. When the untreated exhaust gas introduced through the zone 53B is deodorized in the exhaust gas treatment zone 51 and the treated exhaust gas is discharged through the heat storage zone 53A, the untreated exhaust gas introduced into the heat storage zone 53A when the untreated exhaust gas is introduced. Since the treated exhaust gas remains untreated, when the flow direction of the exhaust gas is reversed, the untreated exhaust gas remaining in the heat storage zone 53A is directly discharged to the outside.
[0008]
Therefore, the residual untreated exhaust gas discharged from the one heat storage zone 53A (53B) side is recirculated from the other heat storage zone 53B (53A) side into the deodorization treatment chamber 50 to form a circulation flow path. Each time a purge duct 60 (FIG. 5: broken line) is formed and the exhaust gas introduction direction is to be reversed, the untreated exhaust gas introduction ducts 56A and 56B and the treated exhaust gas outlet ducts 57A and 57B are blocked, Thus, a purge operation is performed to circulate untreated exhaust gas remaining in the deodorization treatment chamber 50 and perform a deodorization treatment (see JP-A-5-66005).
According to this, when the flow direction of the exhaust gas is reversed, the untreated exhaust gas remaining in each of the heat storage zones 53A and 53B is returned to the deodorization treatment chamber 50 through the purge duct 60 and deodorized. It will not be leaked outside.
[0009]
[Problems to be solved by the invention]
However, in the simple and small-sized deodorization processing apparatus in which only two heat storage zones are formed as described above, when the purge operation is performed, the circulation flow path is formed by the purge duct 60, so that the untreated exhaust gas introduction duct 56A. 56B and the treated exhaust gas outlet ducts 57A, 57B must be shut off, and during that time, the untreated exhaust gas fed from the exhaust gas generation source cannot be introduced into the deodorizing treatment chamber 50. There has been a problem that the exhaust gas to be fed cannot be continuously processed, and the load on the exhaust gas discharge side of the exhaust gas generation source fluctuates extremely each time.
For example, if the drying furnace for painting is an exhaust gas source, and the load on the exhaust gas exhaust side fluctuates extremely, the flow of hot air and the furnace temperature in the drying furnace cannot be kept constant, resulting in improved coating quality. In addition to adverse effects, contaminated air in the furnace may leak out of the furnace, and in some cases, it may be introduced into a coating booth connected to the drying furnace to contaminate the coating film.
Therefore, the present invention enables purging so that untreated exhaust gas in the deodorizing chamber does not flow outside when the flow direction of exhaust gas is reversed, and interrupts the supply of untreated exhaust gas from the exhaust gas generation source. It is a technical problem to enable continuous deodorization treatment without any problems.
[0010]
[Means for Solving the Problems]
In order to solve this problem, the present invention heats untreated exhaust gas into a deodorizing treatment chamber that serves as an exhaust gas flow path that introduces untreated exhaust gas from the introduction end side and discharges treated exhaust gas from the outflow end side. An exhaust gas treatment zone for deodorization treatment is formed, and a heat storage zone having a heat storage layer is formed upstream and downstream of the exhaust gas treatment zone, and untreated exhaust gas introduction for introducing untreated exhaust gas into each heat storage zone A duct and a treated exhaust gas discharge duct for discharging the treated exhaust gas are connected to each other, and the untreated exhaust gas introduction duct is connected to an exhaust gas supply duct for feeding the untreated exhaust gas discharged from the exhaust gas generation source, Untreated exhaust gas introduced into the deodorization chamber through one heat storage zone is treated in the exhaust gas treatment zone, and the treated exhaust gas is discharged through the other heat storage zone. Then, the flow direction of the exhaust gas in the deodorization treatment chamber is reversed, and this time, the untreated exhaust gas introduced into the deodorization treatment chamber through the other heat storage zone is treated in the exhaust gas treatment zone, and the treated exhaust gas is stored in one heat storage In the heat storage deodorization processing apparatus for deodorizing the untreated exhaust gas fed through the exhaust gas supply duct by exhausting from the zone and alternately repeating this, each heat storage zone remains in its interior. An air reservoir that collects and temporarily stores the untreated exhaust gas is connected via a purge duct, and a reflux duct that recirculates the untreated exhaust gas stored in the air reservoir to the heat storage zone on the introduction side is directly connected to each heat storage zone. When the exhaust gas flow direction in the deodorizing treatment chamber is reversed, first, untreated, which remains in the heat storage zone on the exhaust side. The gas is temporarily stored in the air reservoir, and then the untreated exhaust gas in the air reservoir is sent to the heat storage zone on the introduction side together with the untreated exhaust gas fed from the exhaust gas generation source, processed in the exhaust gas treatment zone, and discharged. The treated exhaust gas is discharged to the outside from the heat storage zone on the side.
[0011]
According to the present invention, the untreated exhaust gas introduced into the deodorization treatment chamber through one heat storage zone formed in the deodorization treatment chamber is preheated in the heat storage layer of the heat storage zone, and then deodorized in the exhaust gas treatment zone. When the high temperature treated exhaust gas flows out through the other heat storage zone, the heat of the treated exhaust gas is recovered in the heat storage layer.
Then, when the flow direction of the exhaust gas in the deodorizing treatment chamber is reversed, this time, the untreated exhaust gas is introduced through the heat storage zone from which the high temperature treated exhaust gas has been discharged. After being preheated at, deodorization is performed in the exhaust gas treatment zone, and when the high temperature treated exhaust gas flows out through the other heat storage zone, the heat is recovered in the heat storage layer.
Therefore, this is alternately repeated, and the untreated exhaust gas fed through the exhaust gas feeding duct is continuously processed.
When the flow direction of the exhaust gas in the deodorization treatment chamber is reversed, the heat storage zone into which the untreated exhaust gas has been introduced becomes the exhaust side, and the treated exhaust gas deodorized in the exhaust gas treatment zone passes through the heat storage zone. Discharged. Immediately after the reversal, the untreated exhaust gas remaining in the heat storage zone is pressed out by the treated exhaust gas. First, the untreated exhaust gas is temporarily stored in the air reservoir so as not to be discharged outside. Thereafter, only the treated exhaust gas is discharged to the outside.
Next, if the untreated exhaust gas stored in the air reservoir is introduced into the heat storage zone on the introduction side together with the untreated exhaust gas supplied from the exhaust gas generation source and deodorized in the exhaust gas treatment zone, the untreated exhaust gas stored in the air reservoir Therefore, the exhaust load of the exhaust gas generation source does not fluctuate greatly.
As a result, even when purging the heat storage zone in a unit-sized heat storage deodorization processing device in which only two heat storage zones are formed, there is no need to interrupt the deodorization processing of the untreated exhaust gas supplied from the exhaust gas generation source. , Can be deodorized continuously.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.
FIG. 1 is a flow sheet showing a heat storage deodorizing apparatus according to the present invention, and FIG. 2 is a time chart showing opening / closing timing of an auto damper.
[0013]
In the figure, reference numeral 1 is a catalytic thermal storage deodorizing apparatus for deodorizing a combustible harmful odor component contained in exhaust gas by oxidation combustion or thermal decomposition in the presence of a catalyst, and introducing untreated exhaust gas from the introduction end side. An exhaust gas treatment zone 3 is formed in the deodorization treatment chamber 2 serving as an exhaust gas flow path for discharging the treated exhaust gas from the outflow end side, and the untreated exhaust gas is heated and deodorized, and the exhaust gas treatment zone 3 Heat storage zones 5A and 5B having the heat storage layer 4 are formed on the upstream side and the downstream side.
[0014]
The exhaust gas treatment zone 3 includes a heating chamber 7 in which a heating device 6 such as a combustion burner is disposed, and catalyst layers 8 and 8 disposed between the heating chamber 7 and the heat storage zones 5A and 5B. In each of the heat storage zones 5A and 5B, untreated exhaust gas introduction ducts 10A and 10B connected to an exhaust gas supply duct 9 for supplying untreated exhaust gas by a blower fan F, and treated exhaust gas exhaust for discharging treated exhaust gas Ducts 11A and 11B are connected to each other.
[0015]
The untreated exhaust gas introduced into the deodorizing treatment chamber 2 through one heat storage zone 5A is heated in the heating chamber 7 of the exhaust gas treatment zone 3, and then the catalyst layer on the side facing the other heat storage zone 5B. When the deodorized treatment is performed at 8 and the high temperature treated exhaust gas is discharged through the heat storage zone 5B, the heat is recovered in the heat storage layer 4 of the heat storage zone 5B.
Subsequently, the flow direction of the exhaust gas in the deodorization treatment chamber 2 is reversed, and the untreated exhaust gas introduced into the deodorization treatment chamber 2 through the other heat storage zone 5B is heated in the heating chamber 7 of the exhaust gas treatment zone 3. After that, when the deodorized treatment is performed by the catalyst layer 8 on the side facing one heat storage zone 5A and the high temperature treated exhaust gas is discharged through the heat storage zone 5A, the heat is generated in the heat storage layer 4 of the heat storage zone 5B. Collected. And it repeats this alternately and is configured to deodorize the untreated exhaust gas fed through the exhaust gas feed duct 9.
[0016]
Each of the heat storage zones 5A and 5B is connected to an air reservoir 12 that discharges residual untreated exhaust gas remaining inside and temporarily stores it via purge ducts 13A and 13B. An air recirculation duct 14 that recirculates the treated exhaust gas to the suction port side of the blower fan F is communicated with the heat storage zones 5A and 5B via the untreated exhaust gas introduction ducts 10A and 10B.
The ducts 10A, 10B, 11A, 11B, 13A, 13B, and 14 are provided with auto dampers 15A, 15B, 16A, 16B, 17A, 17B, and 18 for conducting / blocking the respective flow paths. These dampers are controlled to be opened and closed by the control device 20 at a preset timing.
[0017]
FIG. 2 is a time chart of each auto damper that is controlled to be opened and closed by the control device 20, and when the operation of the deodorizing apparatus 1 is started, the auto dampers 15A, 15A, 10A, 10B interposed in the untreated exhaust gas introduction ducts 10A, 10B. 15B are alternately opened and closed, and the flow direction of the exhaust gas in the deodorizing chamber 2 is reversed every predetermined time (for example, 60 seconds).
Here, first, when the auto damper 15A (15B) is opened and the untreated exhaust gas introduction duct 10A (10B) connected to the one heat storage zone 5A (5B) is conducted (FIG. 2: T ₁ ), The auto damper 17B (17A) interposed in the purge duct 13B (13A) connected to the other heat storage zone 5B (5A) on the discharge side is opened, for example, for 2 seconds (FIG. 2: T _{1 to} T ₂ ).
Thereby, when the flow direction of the exhaust gas in the deodorizing treatment chamber 2 is reversed, the heat storage zone 5B (5A) into which the untreated exhaust gas has been introduced becomes the outflow side, and the deodorizing treatment is performed in the exhaust gas treatment zone (3). The treated exhaust gas is discharged through the heat storage zone 5B (5A). Immediately after the reversal, since the residual untreated exhaust gas remaining in the heat storage zone 5B (5A) is pressed out by the treated exhaust gas, this residual untreated exhaust gas is first supplied to the air reservoir via the purge duct 13B (13A). 12 is temporarily stored.
[0018]
Next, when 2 seconds have passed, the auto damper 17B (17A) is closed to shut off the purge duct 13B (13A), and the auto damper 16B (58B) for 58 seconds until the untreated exhaust gas introduction duct 10A (10B) is shut off. simultaneously 16A) to open to thereby conduct the treated exhaust gas discharge duct 11B (11A), to conduct the air reflux duct 14 auto damper 18 opened (FIG. _2: T 2 ~T _3).
As a result, the residual untreated exhaust gas temporarily stored in the air reservoir 12 is supplied to the suction side of the blower fan F via the air recirculation duct 14, and from the exhaust gas generation source (not shown) via the exhaust gas supply duct 9. In addition to the untreated exhaust gas sent in this way, it is fed to the heat storage zone 5A (5B) on the introduction side via the untreated exhaust gas introduction duct 10A (10B) and deodorized in the exhaust gas treatment zone 3, and then discharged. The treated exhaust gas is discharged from the heat storage zone 5B (5A) on the side.
[0019]
Note that when the exhaust gas air volume fed from the exhaust gas generation source is 60 m ³ / min, the air volume of the blower fan F, for example by setting a 62m ³ / min, the conductive Pajidakuto 13B (13A) is In the first 2 seconds, about 2 m ^{3 of} air containing residual untreated exhaust gas is stored in the air reservoir 12, and in the remaining 58 seconds of conducting the exhaust gas exhaust duct 11B (11A), 60 m ³ / A total of 58 m ³ of untreated exhaust gas fed in min and 2 m ³ of residual untreated exhaust gas flowing out from the air reservoir 12 are combined, and 60 m ³ of untreated exhaust gas is introduced into the heat storage zone 5A (5B) on the introduction side. Can be made.
Thus, since the amount of untreated exhaust gas stored in the air reservoir 12 is small, the exhaust load of the exhaust gas generation source does not fluctuate greatly.
[0020]
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 to be catalytic combustion temperature (for example, 350 to 400 ° C.) in the combustion burner 6. Until the heat storage zone 5B (5A) on the outflow side is faced and oxidized and burned or thermally decomposed for deodorization.
At this time, since reaction heat is generated, the temperature of the treated exhaust gas becomes considerably high, and when the treated exhaust gas passes through the heat storage zone 5B and is discharged from the treated exhaust gas discharge duct 11B (11A), the heat Is recovered in the heat storage layer 4.
[0021]
Then, when 60 seconds have elapsed, the flow direction of the exhaust gas in the deodorizing treatment chamber 2 is reversed, the untreated exhaust gas is introduced through the heat storage zone 5B, and the treated exhaust gas is discharged through the heat storage zone 5A. Then, the residual untreated exhaust gas remaining in the heat storage zone 5A can be purged while continuously deodorizing the untreated exhaust gas fed from the exhaust gas generation source.
[0022]
FIG. 3 is a flow sheet showing another heat storage deodorizing apparatus according to the present invention, and FIG. 4 is a timing chart showing opening / closing timing of each auto damper. In addition, the same code | symbol is attached | subjected about the part which is common in FIG. 1, and detailed description is abbreviate | omitted.
In this example, purge ducts 21A and 21B for supplying untreated exhaust gas remaining in the heat storage zones 5A and 5B to the suction side of the blower fan F are connected to the respective heat storage zones 5A and 5B. Are provided with auto dampers 22A and 22B for conducting / blocking the flow path.
The control device 23 controls the opening and closing of the auto dampers 15A, 15B, 16A, 16B, 22A, and 22B interposed in the ducts 10A, 10B, 11A, 11B, 21A, and 21B at a predetermined timing. The flow rate of the blower fan F is controlled to increase or decrease at a predetermined timing.
[0023]
FIG. 4 is a time chart showing the timing of the opening / closing control of each auto damper and the air flow rate control of the blower fan F by the control device 23. When the operation of the deodorizing treatment device 1 is started, the untreated exhaust gas introduction duct 10A. , 10B are alternately opened and closed, and the flow direction of the exhaust gas in the deodorizing chamber 2 is reversed every predetermined time (for example, 60 seconds).
[0024]
Here, first, when the auto damper 15A (15B) is opened and the untreated exhaust gas introduction duct 10A (10B) connected to the one heat storage zone 5A (5B) is conducted (FIG. 4: T ₁ ), The auto damper 22B (22A) interposed in the purge duct 21B (21A) connected to the other heat storage zone 5B (5A) on the discharge side is opened, for example, for 2 seconds (FIG. 4: T _{1 to} T ₂ ).
At this time, since the auto damper 16B (16A) interposed in the treated exhaust gas discharge duct 11B (11A) connected to the heat storage zone 5B (5A) on the outflow side is still closed, the purge duct 21B (21A) The untreated exhaust gas that has flowed out through the exhaust gas passes through the untreated exhaust gas introduction duct 10 </ b> A (10 </ b> B) together with the untreated exhaust gas fed from the exhaust gas generation source to the exhaust gas treatment zone 3 from the introduction-side heat storage zone 5 </ b> A (5 </ b> B). It is introduced into the inside and deodorized.
[0025]
Further, when untreated exhaust gas is supplied at, for example, 60 m ³ / min from an exhaust gas generation source (not shown) through the exhaust gas supply duct 9 by the blower fan F, the purge duct 21B (21A) is made conductive. Then, the air flow is returned to the suction side of the blower fan F. At this time, the blower fan F flows through the untreated exhaust gas introduction duct 10A (10B), the deodorizing chamber 2, and the purge duct 21B (21A). There is a time lag of several seconds until it returns to the suction side.
Therefore, even if the amount of air blown from the blower fan F is increased for 2 seconds, the pressure on the suction side does not increase rapidly, and the amount of untreated exhaust gas fed from the exhaust gas generation source is not reduced continuously. Deodorizing treatment can be performed.
Note that the air volume of the untreated exhaust gas to be supplied by the blower fan F is equal to the air volume supplied from the exhaust gas generation source (not shown) to the amount recirculated through the purge duct 21B (21A) with a predetermined time lag. Since it increases, it may be a case of gradually increasing the amount of air blown from the blower fan F in accordance with the increase, and in this case as well, without reducing the amount of untreated exhaust gas to be fed, Deodorizing treatment can be performed continuously.
[0026]
Next, when 2 seconds have elapsed, the auto damper 22B (22A) is closed and the purge duct 21B (21A) is shut off. This time, the auto damper is used for 58 seconds until the untreated exhaust gas introduction duct 10A (10B) is shut off. 16B (16A) is opened and the treated exhaust gas discharge duct 11B (11A) is turned on. At the same time, the air flow rate of the blower fan F is returned to the normal air flow rate of 60 m ³ / min to perform deodorization treatment of the untreated exhaust gas. (Figure 4: T ₂ ~T _3).
[0027]
Thereby, the untreated exhaust gas fed from the exhaust gas generation source (not shown) through the exhaust gas feed duct 9 is introduced into the introduction side heat storage zone 5A (5B) through the untreated exhaust gas introduction duct 10A (10B). First, after being preheated in the heat storage layer 4, it is introduced into the heating chamber 7 and heated to the combustion temperature of the catalyst (for example, 350 to 400 ° C.) by the combustion burner 6. The catalyst layer 8 facing 5A) is subjected to oxidative combustion or thermal decomposition and deodorized.
Then, when the high-temperature treated exhaust gas is discharged through the heat storage zone 5B (5A) on the outflow side, the heat is recovered in the heat storage layer 4.
[0028]
When 60 seconds have passed, the flow of the exhaust gas in the deodorization treatment chamber 2 is reversed, the untreated exhaust gas is introduced into the exhaust gas treatment zone 3 through the heat storage zone 5B, and after the deodorization treatment, the heat storage zone 5A is When the treated exhaust gas is discharged through the purge duct 21A, the residual untreated exhaust gas discharged from the heat storage zone 5A is discharged from the exhaust gas generation source by increasing the air flow rate of the blower fan F while making the purge duct 21A conductive. Together with the untreated exhaust gas to be fed, it is returned to the exhaust gas treatment zone 3 through the heat storage zone 5B and deodorized, and this time, the residual untreated exhaust gas remaining in the heat storage zone 5A can be purged.
[0029]
In the above description, the case where the flammable harmful odor components contained in the exhaust gas are oxidized, burned or thermally decomposed in the presence of the catalyst has been described. However, the catalyst layers 8 and 8 are removed, and the temperature in the exhaust gas treatment zone 3 is set to 700. The present invention can also be applied to a case where the combustible harmful and offensive odor component is directly burned by raising the temperature to ˜900 ° C.
[0030]
【The invention's effect】
As described above, according to the heat storage deodorization processing apparatus according to the present invention, when the flow direction of the exhaust gas in the deodorization processing chamber is reversed, the residual untreated exhaust gas flowing out from the heat storage zone on the outflow side is first purge duct. Then, the residual untreated exhaust gas stored in the air reservoir is introduced into the deodorization treatment chamber from the introduction side heat storage zone together with the untreated exhaust gas supplied from the exhaust gas generation source. Since it is discharged to the outside after being treated, it has a very excellent effect that the untreated exhaust gas fed from the exhaust gas generation source can be continuously deodorized while purging.
[0031]
Further, according to another heat storage deodorization processing apparatus according to the present invention, when the flow direction of the exhaust gas in the deodorization processing chamber is reversed, the residual untreated exhaust gas flowing out from the heat storage zone on the outflow side is temporarily purged duct It is recirculated to the suction side of the blower fan installed in the exhaust gas supply duct, and introduced into the deodorization treatment chamber from the heat storage zone on the introduction side together with the untreated exhaust gas fed from the exhaust gas generation source and deodorized. At this time, since the amount of air blown from the blower fan is temporarily increased, the deodorizing process can be performed continuously without reducing the amount of untreated exhaust gas supplied from the exhaust gas generation source while purging. It has a very good effect of being able to.
[Brief description of the drawings]
FIG. 1 is a flow sheet showing a heat storage deodorizing apparatus according to the present invention.
FIG. 2 is a time chart showing the opening / closing timing of each auto damper.
FIG. 3 is a flow sheet showing another heat storage deodorizing apparatus according to the present invention.
FIG. 4 is a time chart showing the opening / closing timing of each auto damper.
FIG. 5 is a flow sheet showing a conventional apparatus.
[Explanation of symbols]
1 ... Heat storage deodorization treatment device 2 ... Deodorization treatment chamber 3 ... Exhaust gas treatment zone 4 ... Heat storage layers 5A, 5B ... Thermal storage zone 8 ... Catalyst layer 9 ... Exhaust gas supply ducts 10A, 10B ... Untreated exhaust gas introduction ducts 11A, 11B ... Treated exhaust gas exhaust duct 12 ... ..Air reservoirs 13A, 13B..Purge duct 14 ... Air recirculation ducts 15A, 15B, 16A, 16B, 17A, 17B, 18 ... Auto damper 20 .... Control devices 21A, 21B ..Purge ducts 22A, 22B ... Auto damper 23 ... Control device

Claims (2)

An exhaust gas treatment zone (3) in which the untreated exhaust gas is heated and deodorized in the deodorization treatment chamber (2) serving as an exhaust gas passage for introducing the untreated exhaust gas from the introduction end side and discharging the treated exhaust gas from the outflow end side. ) And heat storage zones (5A, 5B) having a heat storage layer (4) are formed upstream and downstream of the exhaust gas treatment zone (3),
Each heat storage zone (5A, 5B) is connected with an untreated exhaust gas introduction duct (10A, 10B) for introducing untreated exhaust gas and a treated exhaust gas exhaust duct (11A, 11B) for discharging treated exhaust gas. The untreated exhaust gas introduction ducts (10A, 10B) are connected to an exhaust gas supply duct (9) for feeding the untreated exhaust gas discharged from the exhaust gas generation source,
Untreated exhaust gas introduced into the deodorization chamber (2) through one heat storage zone (5A) is treated in the exhaust gas treatment zone (3), and the treated exhaust gas is discharged through the other heat storage zone (5B). After that, the flow direction of the exhaust gas in the deodorization treatment chamber (2) is reversed, and this time the untreated exhaust gas introduced into the deodorization treatment chamber (2) through the other heat storage zone (5B) The untreated exhaust gas fed through the exhaust gas feeding duct (9) is treated by (3), and the treated exhaust gas is discharged from one heat storage zone (5A) and is alternately repeated. In the heat storage deodorization processing device to deodorize,
Each of the heat storage zones (5A, 5B) is connected to an air reservoir (12) for collecting and temporarily storing untreated exhaust gas remaining in the interior through purge ducts (13A, 13B). A reflux duct (14) for returning the untreated exhaust gas stored in the air reservoir (12) to the heat storage zone (5A, 5B) on the introduction side is directly or indirectly connected to each heat storage zone (5A, 5B),
When the flow direction of the exhaust gas in the deodorization treatment chamber (2) is reversed, first, the untreated exhaust gas remaining in the heat storage zone (5B, 5A) on the exhaust side is temporarily stored in the air reservoir (12), Next, the untreated exhaust gas in the air reservoir (12) is fed to the heat storage zone (5A, 5B) on the introduction side together with the untreated exhaust gas fed from the exhaust gas generation source and processed in the exhaust gas treatment zone (3), A heat storage deodorizing apparatus characterized in that the treated exhaust gas is discharged to the outside from the heat storage zone (5B, 5A) on the discharge side. An exhaust gas treatment zone (3) in which the untreated exhaust gas is heated and deodorized in the deodorization treatment chamber (2) serving as an exhaust gas passage for introducing the untreated exhaust gas from the introduction end side and discharging the treated exhaust gas from the outflow end side. ) And heat storage zones (5A, 5B) having a heat storage layer (4) are formed upstream and downstream of the exhaust gas treatment zone (3),
Each heat storage zone (5A, 5B) is connected with an untreated exhaust gas introduction duct (10A, 10B) for introducing untreated exhaust gas and a treated exhaust gas exhaust duct (11A, 11B) for discharging treated exhaust gas. The untreated exhaust gas introduction ducts (10A, 10B) are connected to an exhaust gas supply duct (9) provided with a blower fan (F) for feeding the untreated exhaust gas discharged from the exhaust gas generation source,
Untreated exhaust gas introduced into the deodorization chamber (2) through one heat storage zone (5A) is treated in the exhaust gas treatment zone (3), and the treated exhaust gas is discharged through the other heat storage zone (5B). After that, the flow direction of the exhaust gas in the deodorization treatment chamber (2) is reversed, and this time the untreated exhaust gas introduced into the deodorization treatment chamber (2) through the other heat storage zone (5B) The untreated exhaust gas fed through the exhaust gas feeding duct (9) is treated by (3), and the treated exhaust gas is discharged from one heat storage zone (5A) and is alternately repeated. In the heat storage deodorization processing device to deodorize,
Each of the heat storage zones (5A, 5B) is connected with a purge duct (21A, 21B) for supplying untreated exhaust gas remaining inside to the suction side of the blower fan (F), respectively.
When the flow direction of the exhaust gas in the deodorizing chamber (2) is reversed, first, the untreated exhaust gas remaining in the heat storage zone (5B, 5A) on the outflow side is discharged through the purge duct (21A, 21B) The untreated exhaust gas supplied from the exhaust gas generation source is sent to the heat storage zone (5A, 5B) on the introduction side and treated in the exhaust gas treatment zone (3), and then the heat storage zone (5B, 5A) on the outflow side The treated exhaust gas is discharged to the outside and the untreated exhaust gas remaining in the heat storage zone (5B, 5A) on the outflow side is temporarily delivered to the heat storage zone (5A, 5B) on the introduction side. The heat storage deodorization processing apparatus is characterized in that the air blowing amount of the blower fan (F) is increased from the air blowing amount of the untreated exhaust gas supplied from the exhaust gas generation source.

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