JP3515253B2 - Thermal storage type deodorizing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type deodorization treatment apparatus in which a plurality of heat storage chambers serving as flow paths for inflowing and exhausting exhaust gas are formed in a direct combustion chamber provided with a burner for heating exhaust gas.

[0002]

2. Description of the Related Art In various facilities such as a coating booth, a coating drying oven, a drying oven for printing, a manufacturing facility for plastics and plywood, a food processing facility, an industrial waste treatment facility, an extinguisher production facility or a perfume production facility, Paint, ink, solvent,
Adhesives, synthetic resins, chemicals, etc. generate harmful malodorous components such as alcohols, esters, and toxic and peculiar odorous phenols and aldehydes.

Exhaust gas containing such a harmful and malodorous component cannot be directly emitted into the atmosphere from the viewpoint of pollution prevention. Therefore, it is usually released in a non-toxic and odorless state by deodorizing treatment. ing. As a typical deodorization treatment method, a direct combustion method is known, in which exhaust gas is oxidatively decomposed at a high temperature of 600 to 800 degrees Celsius to be converted into carbon dioxide gas and water to deodorize, and this has a deodorizing effect. It is outstanding and not inferior to any other deodorizing method, and has the advantage that it can be generally applied to flammable odor components, but on the other hand, it consumes a large amount of fuel. There is a disadvantage that running costs are high due to increased fuel consumption. Therefore, in order to reduce the running cost while keeping the advantages of the direct combustion method as it is, a heat storage type deodorizing treatment device has been proposed.

As shown in FIG. 6, this is because a plurality of heat storage chambers Ha, Hb, Hc, which serve as flow paths for inflowing and outflowing exhaust gas, are connected to a direct combustion chamber 52 having a burner 51 for heating exhaust gas, and each regenerator Ha, Hb, the Hc, respectively, together with the exhaust gas inlet duct 53 and the treated gas discharge duct 54 is connected, become the heat storage layer 55 is formed therein, each regenerator H ₁ to H ₃ Are sequentially and alternately used, the exhaust gas flows into the direct combustion chamber 52 through one heat storage chamber (for example, Ha) to perform deodorization processing, and then the heat of the high-temperature gas discharged from the direct combustion chamber 52 is stored in another heat storage chamber. It is configured to be discharged to the outside via a chamber (for example, Hb).

For example, when the exhaust gas flows into the direct combustion chamber 52 through the heat storage chamber Ha and the high temperature gas heated in the direct combustion chamber 52 is discharged through the heat storage chamber Hb, the high temperature gas passes through the heat storage chamber Hb. At that time, the heat is stored in the heat storage layer 55. Next, if the exhaust gas is flowed into the direct combustion chamber 52 via the heat storage chamber Hb and the high temperature gas is allowed to flow out via the heat storage chamber Hc by switching the flow path, the exhaust gas is generated by the heat of the heat storage layer 55 of the heat storage chamber Hb. Since it is preheated and then flows into the direct combustion chamber, the fuel consumption amount can be reduced, and the heat of the high temperature gas discharged from the direct combustion chamber 52 causes the heat storage layer 55 of the heat storage chamber Hc to store heat. By sequentially using the heat storage chambers Ha to Hc alternately, even if the direct combustion chamber 52 is maintained at a high temperature of 600 to 800 degrees Celsius, fuel consumption can be suppressed low.

Further, as shown in FIG. 7, each heat storage chamber Ha
Not only to form the heat storage layer 55 in Hc, but also to the direct combustion chamber 52
If the catalyst layer 56 is formed facing the above, deodorization can be performed by the catalytic oxidation method, and the exhaust gas can be detoxified and deodorized at a lower temperature. In this catalytic oxidation method, a flammable substance in a gas containing oxygen is subjected to oxidative combustion or thermal decomposition reaction at a relatively low temperature in the presence of a catalyst to decompose into carbon dioxide gas and water to detoxify and deodorize. Is the way to do it. According to this, since the treatment can be performed at a low temperature of about 350 to 400 degrees Celsius, it is possible to operate with lower fuel consumption.

[0007]

However, in any case, the exhaust gas sent from the exhaust gas source such as the coating booth is cooled to some extent while flowing in the duct and flows into the heat storage chambers Ha to Hc. Therefore, when the temperature of the heat storage layer 55 is relatively low (about 100 degrees Celsius), the exhaust gas hits the heat storage layer 55 and is further cooled. Since the exhaust gas contains vaporized organic components and tar, they are aggregated on the surface of the heat storage layer 55, so-called tars adhere, and if left unattended, there is a problem that clogging occurs. .

In this case, when the deodorizing process is performed by the direct combustion method, since the direct combustion chamber 52 is at a high temperature, the heat storage layer 55 is easily heated by heat conduction. When the catalyst layer 56 is formed on Ha to Hc and the deodorization process is performed by the catalytic oxidation method, the direct combustion chamber 52 is at a low temperature, so that the heating amount due to heat conduction is low, and therefore, the amount of the tar deposit is large.

When the heat storage layer 55 is clogged, the exhaust gas is passed through the heat storage chambers Ha to Hc and the direct combustion chamber 52 is discharged.
Cannot be caused to flow into the direct combustion chamber 52 or to be discharged from the direct combustion chamber 52. Therefore, when the heat storage chamber is used as a flow path, the treated air volume of the exhaust gas is reduced, and as a result,
Since the exhaust gas cannot be discharged from the coating booth or the coating drying furnace, there is a problem that contaminated air remains inside the coating booth to cause defective coating. Therefore, the coating quality cannot be maintained unless the heat storage layer 55 is frequently washed or replaced,
The cost required for the maintenance was high. Therefore, in the present invention, the tars attached to the heat storage layer are volatilized again to prevent clogging of the heat storage material to be maintenance-free, and the air containing the volatilized tars can be surely deodorized and then discharged to the outside. This is a technical issue.

[0010]

In order to solve this problem, according to the present invention, a plurality of heat storage chambers serving as flow paths for inflowing and outflowing exhaust gas are arranged in parallel in a direct combustion chamber provided with a burner for heating exhaust gas, An exhaust gas inflow duct and a treated gas exhaust duct are connected to each of the heat storage chambers, and a heat storage layer is formed inside the heat storage chambers. The heat storage chambers are sequentially and alternately used to generate exhaust gas in one heat storage chamber. In the heat storage type deodorization treatment device configured to allow the heat of the high temperature gas discharged from the direct combustion chamber to be discharged to the outside while being stored in the heat storage layer of another heat storage chamber while preheating The exhaust gas inflow duct is provided with a blower for sending the exhaust gas discharged from the exhaust gas generation source to each heat storage chamber, and the heat storage layer is formed in at least two layers on the upstream side and the downstream side with respect to the exhaust gas inflow direction,
Each heat storage chamber is connected to a purge air supply duct that allows a portion of the high-temperature gas heated in the direct combustion chamber to directly flow into the middle portion of the heat storage layer as purge air, and the heat storage on the upstream side with respect to the exhaust gas inflow direction. A purge air recirculation duct that recirculates the purge air that has passed through the bed to the upstream side of the blower is connected, and the purge air supply duct and the purge air recirculation duct are each provided with a purge valve that electrically disconnects them, with respect to the exhaust gas inflow direction. And a valve opening / closing control device for opening the purge valve of the purge air supply duct and the purge air recirculation duct connected to the heat storage chamber when performing the purge operation for removing the tar that has adhered to the heat storage layer on the upstream side. To do.

According to this, for example, when three heat storage chambers are formed, exhaust gas is introduced from the first heat storage chamber to be preheated in the heat storage layer and is heated in the direct combustion chamber from the second heat storage chamber. The generated high temperature gas is caused to flow out and the heat is stored in the heat storage layer, and a purge operation is performed in the third heat storage chamber. Then, for example, when 60 seconds have elapsed, the flow path is switched to allow the exhaust gas to flow from the second heat storage chamber where the heat is stored in the heat storage layer, and the high temperature gas to flow out through the third heat storage chamber where the purge operation has ended. The barge operation is performed in the first heat storage chamber where the tar is adhered to the heat storage layer due to the inflow of exhaust gas, and when 60 seconds have passed, the flow path is switched again to allow the exhaust gas to flow in from the third heat storage chamber. Exhaust gas is caused to flow out through the heat storage chamber, a purge operation is performed in the second heat storage chamber, and this is repeated to perform continuous deodorization processing. , Repeat the outflow sequentially.

When the exhaust gas flows in, the exhaust gas is preheated by the heat stored in the heat storage layer. When the heat of the heat storage layer is radiated and cooled, the tars contained in the exhaust gas are located upstream of the exhaust gas inflow direction. Since much adheres to the heat storage layer, the purge operation is performed after the exhaust gas has flowed in. In the heat storage chamber where the purge operation is performed, the purge valve of the purge air supply duct is opened, and the high temperature gas heated in the direct combustion chamber is used as purge air.
While flowing into the middle of the heat storage layer formed in two layers, the purge valve of the purge air recirculation duct is opened, and passes through the heat storage layer on the upstream side in the exhaust gas inflow direction and is recirculated to the upstream side of the blower. Therefore, the high temperature gas heated in the direct combustion chamber is blown to the heat storage layer to which the resin is attached, and the resin is vaporized and the heat storage layer is purified. Then, the purge air containing the vaporized tar is recirculated to the upstream side of the blower and guided again to the direct combustion chamber through the exhaust gas inflow duct, so that the contaminated air does not leak to the outside.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below based on the embodiments shown in the drawings. FIG. 1 is a flow sheet showing a heat storage type deodorizing apparatus according to the present invention, and FIG.
(C) is a flow sheet showing the operating procedure.

In the figure, reference numeral 1 designates a heat storage type deodorization treatment apparatus in which three heat storage chambers Ha to Hc are formed as a flow path for inflowing and outflowing exhaust gas into a direct combustion chamber 3 equipped with a burner 2 for heating exhaust gas. An exhaust gas inflow duct 4 and a treated gas exhaust duct 5 are connected to each of the heat storage chambers Ha to Hc, and a catalyst layer 6 is formed inside the exhaust gas inflow duct 4 and the treated gas exhaust duct 5 so as to face the direct combustion chamber 3. The heat storage layer 7 is formed on the side of the connection ports 4 and 5.
The exhaust gas inflow duct 4 is provided with a blower 8 that pushes the exhaust gas sent from the exhaust gas generation source into the direct combustion chamber 3 via the heat storage chambers Ha to Hc, and is branched on the downstream side of the blower 8. It is connected to each of the heat storage chambers Ha to Hc via each of the branch ducts 4a to 4c. The treated gas exhaust duct 5 is formed by assembling exhaust ducts 5a to 5c connected to the heat storage chambers Ha to Hc.

The branch ducts 4a to 4c and the exhaust ducts 5a to 5c are provided with switching valves 9a to 9c and 10a to 10c for switching the flow passages, and by switching these, the heat storage chambers Ha to. Hc is sequentially and alternately used to allow the exhaust gas to preheat in one heat storage chamber while flowing into the direct combustion chamber 3, and the high temperature gas discharged from the direct combustion chamber 3 is decomposed and reacted in the catalyst layer 6 of the other heat storage chamber. At the same time, the heat of the high-temperature gas is stored in the heat storage layer 7 and discharged to the outside.

The heat storage layers 7 are at least two heat storage layers 7u and 7d on the upstream side and the downstream side with respect to the exhaust gas inflow direction.
It is made of, for example, a porous material formed of a ceramic or a metal compound in a honeycomb, or a porous material formed by bundling a large number of tubular bodies. In each of the heat storage chambers Ha to Hc, a part of the exhaust gas heated in the direct combustion chamber 3 is stored in the heat storage layers 7u and 7d.
Is connected to purge air supply ducts 11a to 11c that directly flow in as purge air to the middle portion of the above, and the purge air that has passed through the heat storage layer 7u that is the upstream side in the exhaust gas inflow direction from the middle portion is upstream of the blower 8. To the purge air supply ducts 11a to 11c and the purge air recirculation ducts 12a to 12c, the purge valves 13a to 13c and 14a to 14c are connected to the purge air recirculation ducts 12a to 12c.
c are installed respectively. Further, 15 is a switching valve 9a to 9c and 10a to 10c for switching the flow paths of the exhaust gas inflow duct 4 and the treated gas exhaust duct 5, and a valve opening / closing control for opening / closing each of the barge valves 13a to 13c and 14a to 14c. A device, for example, FIG.
The flow paths are switched as shown in (a) to (c).

FIG. 2 is a flow sheet showing the operating procedure of the device of the present invention. For example, initially, the switching valves 9a and 10b.
When the purge valves 13c and 14c are opened, as shown in FIG.
As shown in, the exhaust gas flows from the exhaust gas inflow duct 4 into the direct combustion chamber 3 through the heat storage chamber Ha, and the direct combustion chamber 3 has a temperature of 35 degrees Celsius.
A flow path is formed through which the high-temperature gas heated to 0 to 450 degrees is discharged to the treated gas discharge duct 5 via the heat storage chamber Hb, and a decomposition reaction occurs when the high-temperature gas passes through the catalyst layer 6 of the heat storage chamber Hb. The heat contained in the gas that has passed through the catalyst layer 6 is stored in the heat storage layer 7 while being deodorized.

At this time, since the purge valves 13c and 14c are open, part of the high temperature gas heated in the direct combustion chamber 3 is returned to the upstream side of the blower 8 through the heat storage layer 7u of the heat storage chamber Hc. . At this time, 350 to 45 degrees Celsius in the direct combustion chamber 3
The exhaust gas heated to 0 degrees is the purge air supply duct 11
Since it is directly sprayed to the heat storage layer 7u via c, and there is no temperature drop due to passing through the catalyst layer 6 and the heat storage layer 7d, it is sprayed on the catalyst layer 7u at a relatively high temperature and adheres to the catalyst layer 7u. It is possible to surely remove the tar. Further, the purge air discharged from the heat storage chamber Hc contains the resin vaporized from the heat storage layer 7u,
Since it is recirculated to the upstream side of the blower 8 interposed in the exhaust gas inflow duct 4 via the purge air recirculation duct 12c, it is guided to the direct combustion chamber 3 again via the heat storage chamber Ha without being discharged to the outside as it is. It is burned and deodorized. Since the heat storage layer 7 of the heat storage chamber Ha is deprived of the heat accumulated therein by the inflowing exhaust gas and gradually radiates heat to cool, the tar is attached to the surface of the upstream heat storage layer 7u to which the exhaust gas is blown. I will do it.

Next, after 60 seconds have passed, the switching valves 9a and 10b and the purge valves 13c and 14c are closed,
This time, the switching valves 9b and 10c and the purge valve 13
When a and 14a are opened, as shown in FIG. 2B, the exhaust gas flows from the exhaust gas inflow duct 4 into the direct combustion chamber 3 via the heat storage chamber Hb, and the high temperature gas heated in the direct combustion chamber 3 stores heat. Room H
A flow path for discharging to the treated gas discharge duct 5 via c is formed, and a purge operation is performed in the heat storage chamber Ha,
The tar that has adhered to the heat storage layer 7u is removed.

Further, after 60 seconds have passed, the switching valve 9b,
10c and the purge valves 13a, 14a are closed, and this time, the switching valves 9c, 10a and the purge valves 13b,
When 14b is opened, as shown in FIG. 2C, the exhaust gas flows from the exhaust gas inflow duct 4 into the direct combustion chamber 3 through the heat storage chamber Hc, and the high temperature gas heated in the direct combustion chamber 3 is stored in the heat storage chamber Ha. A flow path for discharging the treated gas to the treated gas discharge duct 5 is formed, and a purge operation is performed in the heat storage chamber Hb to remove the tar that has adhered to the heat storage layer 7u.

In this way, if the heat storage chambers Ha to Hc are sequentially switched alternately and used, not only the exhaust gas discharged from the exhaust gas generation source can be continuously deodorized, but also while the exhaust gas is being deodorized. Since the purge operation for removing the tars adhering to the heat storage layer 7u can be performed, the tars adhering to the heat storage layer 7 are automatically removed, clogging is prevented, and maintenance becomes extremely simple.

When the high temperature gas is discharged from the direct combustion chamber 3 through the heat storage chambers Ha to Hc, the heat storage layer 7 of each of the heat storage chambers Ha to Hc is heat-stored by the heat of the high temperature gas. The catalyst layer 7d closer to the chamber 3 is easily heated, but the heat storage layer 7u farther away is less likely to be heated. However, in this example, before using each of the heat storage chambers Ha to Hc as the discharge passage of the high temperature gas,
Since the high temperature purge air discharged from the direct combustion chamber 3 is directly blown to the heat storage layer 7u farther from the direct combustion chamber 3, the heat storage layer 7u which is hard to be heated is preheated and the exhaust gas of high temperature gas When the discharge is completed, the entire heat storage layer 7 will be heated uniformly. After that, each of the heat storage chambers Ha to Hc is used as an inflow passage of the exhaust gas, and the exhaust gas flows in through the heat storage layer 7 that is uniformly heated as a whole. Therefore, even if the exhaust gas temperature is low, this should be preheated. In addition, since the heat storage layer 7u on the upstream side is sufficiently stored with heat, it is possible to minimize the adhesion amount of the tar.

Further, in the above embodiment, the catalyst layer 6
Although the case where the catalyst is provided for deodorization by the catalytic oxidation method has been described, even if the catalyst layer 6 is not provided, the direct combustion chamber 3
If the temperature is set high, deodorization can be performed by the direct combustion method. Furthermore, the heat storage layer 7 of each heat storage chamber Ha-Hc
Alternatively, the purge air supply ducts 11a to 11c may be connected between the catalyst layer 6 and the heat storage layer 7 instead of forming the two layers.

FIGS. 3 (a) to 3 (d) are flow sheets showing the operating procedure when the heat storage chambers Ha and Hb communicating with the direct combustion chamber 3 are provided in two. The same parts as those in FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof will be omitted. In this example, since the deodorizing process of the exhaust gas is interrupted when performing the purge operation, the on / off valve 16 is provided on the exhaust gas inflow duct 4 upstream of the blower 8.

Then, for example, first, the switching valve 9a,
When 10b is opened, as shown in FIG. 3 (a), the exhaust gas flows from the exhaust gas inflow duct 4 into the direct combustion chamber 3 via the heat storage chamber Ha, and the high temperature gas heated in the direct combustion chamber 3 is stored in the heat storage chamber H.
A flow path is formed to be discharged to the treated gas discharge duct 5 via b, and when the high temperature gas passes through the catalyst layer 6 of the heat storage chamber Hb, it is decomposed and deodorized, and at the same time, the high temperature gas is changed to the catalyst layer 6. The heat of the treated gas after passing through is stored in the heat storage layer 7.

Then, the switching valves 9a and 10b are closed,
This time, the switching valve 9b and the purge valves 13a, 14a
3 is opened and the on / off valve 16 is closed, as shown in FIG. 3B, the heat storage chamber H is blown from the blower 8 via the branch pipe 4b.
The purge air that has flowed into b and is heated in the direct combustion chamber 3 passes through the heat storage layer 7u of the heat storage chamber Ha, and the purge air recirculation duct 1
A closed circuit from 2a to the blower 8 is formed, and hot air is circulated in this flow path to perform a purge operation, thereby removing the tars adhering to the heat storage layer 7u of the heat storage chamber Ha.

When the purge operation of the heat storage chamber Ha is completed, the purge valves 13a and 14a are closed and
The on / off valve 16 is opened, and this time, the switching valve 9b,
When 10a is opened, as shown in FIG. 3C, the exhaust gas flows into the direct combustion chamber 3 through the heat storage chamber Hb, and the processed gas is discharged from the direct combustion chamber 3 through the heat storage chamber Ha to the outside. . Then, the switching valves 9b and 10a are closed, this time, the switching valve 9a and the purge valves 13b and 14b are opened, and the on / off valve 16 is closed, as shown in FIG.
After blown into the heat storage chamber Ha from the blower 8 and directly blowing the purge air heated in the direct combustion chamber 3 onto the heat storage layer 7u of the heat storage chamber Hb, a flow path from the purge air recirculation duct 12b to the blower 8 is formed. By performing a purge operation by circulating hot air in the passage, the tar that has adhered to the heat storage layer 7u of the heat storage chamber Hb is removed.

As described above, when there are only two heat storage chambers Ha and Hb, the purge operation cannot be performed while the exhaust gas is being deodorized, so the purge operation and the exhaust gas treatment are alternately performed, and therefore the exhaust gas Will be processed intermittently.

FIG. 4 is a flow sheet showing still another embodiment, in which the same portions as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted. In this example, the exhaust gas heated in the direct combustion chamber 3 is not directly blown to the heat storage layer 7u, but this heat is effective when the treated gas discharged from the heat storage chambers Ha to Hc still contains heat. It is intended to remove the tar that has adhered to the heat storage layer 7u by utilizing the above.

The treated gas discharge duct 5 is provided with a blower 18 for sucking the treated gas discharged from the heat storage chambers Ha to Hc and sending it to the outside.
.. to Hc are connected to purge air supply ducts 19a to 19c for allowing a part of the treated gas sent out from the blower 18 to directly flow into the inlet side to which the exhaust gas inflow duct 4 is connected as purge air. The purge air does not pass through the heat storage layer 7d and the catalyst layer 6 from the intermediate portion of the heat storage layers 7u and 7d formed in two layers, and the direct combustion chamber 3
To the purge air supply ducts 19a to 19c and the purge air return ducts 20a to 20c.
22c are installed respectively.

This operating procedure will be described with reference to FIG. 5. First, when the switching valves 9a and 10b and the purge valves 13c and 14c are opened, heat is accumulated from the exhaust gas inflow duct 4 as shown in FIG. 5 (a). The exhaust gas flows into the direct combustion chamber 3 through the chamber Ha, and a flow path is formed in which the high-temperature gas heated in the direct combustion chamber 3 is discharged from the heat storage chamber Hb to the treated gas discharge duct 5, and the exhaust gas is stored in the heat storage chamber. When Hb passes through the catalyst layer 6, it undergoes a decomposition reaction to be deodorized, and the heat of the exhaust gas is stored in the heat storage layer 7. At this time, the purge valve 1
Since 3c and 14c are open, a part of the exhaust gas sent from the blower 18 to the outside will be partially removed from the purge air supply duct 1.
It is sent to the heat storage chamber Hc via 9c, and the heat storage layer 7u
After removing the tar that adheres to the purge air recirculation duct 2
It is recirculated to the direct combustion chamber 3 via 0c and is again deodorized.

Next, after 60 seconds have passed, the switching valves 9a and 10b and the purge valves 13c and 14c are closed,
This time, the switching valves 9b and 10c and the purge valve 13
When a and 14a are opened, as shown in FIG. 5 (b), the exhaust gas flows from the exhaust gas inflow duct 4 into the direct combustion chamber 3 via the heat storage chamber Hb, and the high temperature gas heated in the direct combustion chamber 3 stores heat. Room H
A flow path from c to the treated gas discharge duct 5 is formed, and a purge operation is performed in the heat storage chamber Ha to remove the tar that has adhered to the heat storage layer 7u.

Further, after 60 seconds have passed, the switching valve 9b,
10c and the purge valves 13a and 14a are closed, and this time, the switching valves 9c and 10a and the purge valve 13b,
When 14b is opened, as shown in FIG. 5C, the exhaust gas flows from the exhaust gas inflow duct 4 into the direct combustion chamber 3 through the heat storage chamber Hc, and the high temperature gas heated in the direct combustion chamber 3 is stored in the heat storage chamber Ha. From the treated gas discharge duct 5 is formed, the purge operation is performed in the heat storage chamber Hb, and the heat storage layer 7u is formed.
The tar that has adhered to is removed.

As described above, by sequentially using the heat storage chambers Ha to Hc alternately, it is possible to continuously perform the deodorization process of the exhaust gas while removing the tars adhering to the heat storage layer 7. Note that, also in this example, the temperature of the direct combustion chamber 3 may be set high and the deodorization process may be performed by the direct combustion method without forming the catalyst layer 6 in the heat storage chambers Ha to Hc. When forming, the heat storage layer 7 may be a single layer and the purge air recirculation ducts 20a to 20c may be connected between the catalyst layer 6 and the heat storage layer 7.

[0035]

As described above, according to the present invention, the exhaust gas heated to the heat storage chamber is supplied as the purge air, so that the tar adhering to the heat storage layer is volatilized again and the heat storage layer It has a very good effect that clogging is prevented and maintenance free.
In addition, since the air containing the volatilized resin is deodorized again and then discharged to the outside, there is an effect that the external environment is not deteriorated.

[Brief description of drawings]

FIG. 1 is a flow sheet showing an example of a heat storage type deodorization processing apparatus according to the present invention.

FIG. 2 is a flow sheet showing the operation procedure.

FIG. 3 is a flow sheet showing a driving procedure of another embodiment.

FIG. 4 is a flow sheet showing a driving procedure of another embodiment.

FIG. 5 is a flow sheet showing a driving procedure of another embodiment.

FIG. 6 is a flow sheet showing a conventional device.

FIG. 7 is a flow sheet showing a conventional device.

[Explanation of symbols]

1 --- Heat storage type deodorization processing device 2 ・ ・ ・ ・ ・ ・ Burner 3 ... Direct combustion chamber Ha-Hc ... Heat storage chamber 4 ... Exhaust gas inflow duct 5 ... treated gas exhaust duct 6 ... Catalyst layer 7,7u, 7d ... Heat storage layer 8: Blower 11a to 11c ... Purge air supply duct 12a-12c ... Purge air recirculation duct 13a to 13c ... Purge valve 14a to 14c ... Purge valve 15 --- Valve opening / closing control device 18 ... Blower 19a to 19c ... Purge air supply duct 20a to 20c ... Purge air return duct 21a-21c ... Purge valve 22a-22c ... Purge valve

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Michio Taniguchi 1-9-9 Kakimoto-cho, Toyota-shi, Aichi Trinity Industry Co., Ltd. (56) Reference JP-A-5-332525 (JP, A) Japanese Unexamined Patent Publication No. Hei 2-21121 (JP, A) Japanese Unexamined Patent Publication No. 58-158415 (JP, A) Japanese Unexamined Patent Publication No. 7-112118 (JP, A) Japanese Unexamined Patent Publication No. 1-127811 (JP, A) Special Publication No. 4-501307 (JP , A) International publication 96/25224 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23G 7/06 101 F23G 7/06 103 B01D 53/38 B01D 53/74

Claims (4)

(57) [Claims] 1. A plurality of heat storage chambers (Ha to Hc) which are flow paths for inflow and outflow of exhaust gas are arranged in parallel in a direct combustion chamber (3) equipped with a burner (2) for heating exhaust gas, and each of the heat storage chambers (Ha The exhaust gas inflow duct (4) and the treated gas exhaust duct (5) are connected to Ha to Hc), and the heat storage layer (7) is formed inside the exhaust gas inflow duct (4) and each of the heat storage chambers (Ha to Hc). Are sequentially used alternately to allow the exhaust gas to flow into the direct combustion chamber (3) while preheating the exhaust gas in one heat storage chamber, and the heat of the high-temperature gas discharged from the direct combustion chamber (3) is stored in the other heat storage chamber. In the heat storage type deodorization treatment device configured to discharge heat while storing heat in the layer (7), the exhaust gas discharged from the exhaust gas generation source is provided in each of the heat storage chambers (Ha to Hc) in the exhaust gas inflow duct (4). A blower (8) for feeding the heat storage layer (7) to the upstream side and the downstream side with respect to the exhaust gas inflow direction. Is formed in at least two layers (7u, 7d), and each heat storage chamber (Ha ~ Hc) contains a portion of the high temperature gas heated in the direct combustion chamber (3) in the middle portion of the heat storage layer (7u, 7d). Is connected to purge air supply ducts (11a to 11c) that directly flow in as purge air, and the purge air that has passed through the heat storage layer (7u) on the upstream side in the exhaust gas inflow direction is delivered to the upstream side of the blower (8). Purge air recirculation duct (12a-
12c) is connected, the purge air supply duct (11a ~ 11c)
In addition, purge valves (13a to 13c, 14a to 14c) that electrically connect and disconnect the purge air recirculation ducts (12a to 12c) are installed, respectively, and are attached to the heat storage layer (7u) on the upstream side with respect to the exhaust gas inflow direction. The purge air supply duct (11a ~ 11c) connected to the heat storage chamber (Ha ~ Hc) during the purge operation to remove the tar
11c) and a valve opening / closing control device (15) for opening the purge valves (13a-13c, 14a-14c) of the purge air recirculation ducts (12a-12c). 2. A plurality of heat storage chambers (Ha to Hc), which are flow paths for inflowing and outflowing exhaust gas, are arranged in parallel in a direct combustion chamber (3) equipped with a burner (2) for heating exhaust gas, and each heat storage chamber (Ha). The exhaust gas inflow duct (4) and the treated gas exhaust duct (5) are connected to Ha to Hc), and the heat storage layer (7) is formed inside the exhaust gas inflow duct (4) and each of the heat storage chambers (Ha to Hc). Are sequentially used alternately to allow the exhaust gas to flow into the direct combustion chamber (3) while preheating the exhaust gas in one heat storage chamber, and the heat of the high-temperature gas discharged from the direct combustion chamber (3) is stored in the other heat storage chamber. In the heat storage type deodorization treatment device configured to discharge heat to the outside while storing heat in the layer (7), the treated gas discharge duct (5) includes each heat storage chamber (Ha to Hc) from the direct combustion chamber (3). ) Is installed, and a blower (18) for sucking in the treated gas and sending it to the outside is provided, and the heat storage layer (7) is At least two layers (7u, 7d) on the upstream side and the downstream side with respect to the inlet direction are formed, and in each heat storage chamber (Ha to Hc), a part of the treated gas sent out from the blower (18) to the outside is formed. The purge air supply ducts (19a to 19c) for directly flowing in as purge air to the inlet side to which the exhaust gas inflow duct (4) is connected are connected, and the purge air is formed into two heat storage layers (7u, 7d). Of the purge air recirculation duct (20a-20
c) is connected, and the purge air supply ducts (19a to 19c) and the purge air recirculation ducts (20a to 20c) are respectively provided with purge valves (21a to 21c, 22a to 22c) for electrically shutting off the exhaust air inflow ducts. Direction, the purge air supply duct (19a ~ 19c) connected to the heat storage chamber (Ha ~ Hc) during the purge operation to remove the tars adhering to the heat storage layer (7u) on the upstream side
19c) and a valve opening / closing control device (15) for opening the purge valves (21a-21c, 22a-22c) of the purge air return ducts (20a-20c). 3. A plurality of heat storage chambers (Ha to Hc), which are flow paths for inflow and outflow of exhaust gas, are arranged in parallel in a direct combustion chamber (3) equipped with a burner (2) for heating exhaust gas, and each heat storage chamber (Ha The exhaust gas inflow duct (4) and the treated gas exhaust duct (5) are connected to Ha to Hc), and a heat storage layer (7) is formed on the upstream side with respect to the exhaust gas inflow direction inside and the downstream side. A catalyst layer (6) for deodorizing exhaust gas is formed in the heat storage chambers (Ha to Hc) alternately in sequence to preheat the exhaust gas in the heat storage layer (7) of one heat storage chamber. Direct combustion chamber (3)
In the heat storage-type deodorization treatment device, the heat of the high-temperature gas flowing into the direct combustion chamber (3) is discharged to the outside while storing the heat in the heat storage layer (7) of the other heat storage chamber, The exhaust gas inflow duct (4) is provided with a blower (8) for sending the exhaust gas discharged from the exhaust gas generation source to each heat storage chamber (Ha to Hc), and each heat storage chamber (Ha to Hc) is directly burned. Purge air supply ducts (11a to 11c) that allow a part of the high-temperature gas heated in the chamber (3) to directly flow in as purge air into an intermediate portion of the catalyst layer (6) and the heat storage layer (7) are connected to the intermediate portion. Purge air recirculation duct (12a-) that recirculates the purge air that has passed through the heat storage layer (7) from the part to the upstream side of the blower (8).
12c) is connected, the purge air supply duct (11a ~ 11c)
The purge air recirculation ducts (12a to 12c) are respectively provided with purge valves (13a to 13c, 14a to 14c) for electrically connecting and shutting off the purge air recirculation ducts to perform a purge operation for removing tars adhering to the heat storage layer (7). Sometimes the purge air supply ducts (11a to 11c) and the purge air recirculation duct (1) connected to the heat storage chamber (Ha to Hc)
2a to 12c), a heat storage type deodorizing treatment device comprising a valve opening / closing control device (15) for opening the purge valves (13a to 13c, 14a to 14c). 4. A plurality of heat storage chambers (Ha to Hc) which are flow paths for inflow and outflow of exhaust gas are arranged in parallel in a direct combustion chamber (3) equipped with a burner (2) for heating exhaust gas, and each heat storage chamber (Ha The exhaust gas inflow duct (4) and the treated gas exhaust duct (5) are connected to Ha to Hc), and a heat storage layer (7) is formed on the upstream side with respect to the exhaust gas inflow direction inside and the downstream side. A catalyst layer (6) for deodorizing exhaust gas is formed in the heat storage chambers (Ha to Hc) alternately in sequence to preheat the exhaust gas in the heat storage layer (7) of one heat storage chamber. Direct combustion chamber (3)
In the heat storage-type deodorization treatment device, the heat of the high-temperature gas flowing into the direct combustion chamber (3) is discharged to the outside while storing the heat in the heat storage layer (7) of the other heat storage chamber, The treated gas discharge duct (5) is provided with a blower (18) for sucking the treated gas discharged from the direct combustion chamber (3) through the heat storage chambers (Ha to Hc) and sending it to the outside. Purge air supply to each of the heat storage chambers (Ha to Hc) for causing a part of the treated gas sent out from the blower (18) to directly flow into the inlet side to which the exhaust gas inflow duct (4) is connected as purge air. Ducts (19a to 19c) are connected, and the purge air that directly returns the purge air that has passed through the heat storage layer (7) from the intermediate portion between the heat storage layer (7) and the catalyst layer (6) to the direct combustion chamber (3). Ducts (20a to 20c) are connected, and the purge air supply duct (19a 19c) and the purge air recirculation ducts (20a to 20c) are respectively provided with purge valves (21a to 21c, 22a to 22c) that electrically connect and disconnect them, and a purge operation for removing tars adhering to the heat storage layer (7). Purge air supply ducts (19a to 19c) and purge air recirculation ducts (2) connected to the heat storage chambers (Ha to Hc)
A heat storage type deodorization treatment device comprising a valve opening / closing control device (15) for opening the purge valves (21a-21c, 22a-22c) of (0a-20c).