JPH09253448A - Regenerative deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a catalyst from becoming deteriorated by positively lowering indoor temperatures without the generation of a tar subsequently to a drop in the temperatures of an exhaust gas when the indoor temperatures of an exhaust gas heating chamber exceed the previously set upper limits. SOLUTION: Plural regenerators Ha-Hc, each of which is equipped with a catalytic layer 2 and a regenerative layer 3 are aligned with an exhaust gas heating chamber 5, then an untreated gas is allowed into the regenerative layers 3 from one of the regenerators Ha-Hc, and is preheated by the regenerative layers 3. Further, after the preheated gas is conducted into the exhaust gas heating chamber 5, it is exhausted to the outside from the other regenerators Ha-Hc. In this case, if the indoor temperatures of the exhaust gas heating chamber 5 reach the previously set upper limits, an atmospheric air is fed into the exhaust gas heating chamber 5 through a air feed duct by a means A for feeding an atmospheric air. By virtue of this means A, the atmospheric air is directly introduced into the exhaust gas heating chamber 5 to lower the indoor temperatures, if the indoor temperatures are high, and the catalytic layer 2 is prevented from becoming deteriorated due to an overheat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas having a burner in which a plurality of heat storage chambers each having a catalyst layer for deodorizing heated exhaust gas and a heat storage layer for storing heat of high temperature gas passing through the burner are provided with burners. The present invention relates to a catalytic oxidation type heat storage type deodorizing treatment device which is arranged in parallel with a heating chamber.

[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, and the like generate flammable harmful odor components such as alcohols, esters, phenols and aldehydes having toxic and peculiar odors.

[0003] Since exhaust gas containing such harmful and odorous components cannot be directly discharged into the atmosphere from the viewpoint of pollution prevention, it is usually deodorized and released in a non-toxic and odorless state. ing. As a typical deodorization treatment method, there is known a direct combustion method in which a harmful malodorous component in exhaust gas is burned at a high temperature of 700 to 900 ° C. to be converted into carbon dioxide gas and water to be deodorized. This has an excellent deodorizing effect, is not inferior to any other deodorizing method, and has the advantage that it can be generally applied to combustible odor components, but on the other hand, it consumes fuel. The amount is large,
There is a disadvantage that running cost is increased due to increased fuel efficiency.

In order to suppress fuel consumption and reduce running costs, a catalytic oxidation method has been proposed in which a harmful malodorous component contained in exhaust gas is subjected to an oxidative decomposition reaction in the presence of a catalyst. This is a method of promoting the oxidative decomposition reaction in the presence of a platinum-based, cobalt-based, nickel-based catalyst, etc., and decomposing a flammable and toxic malodorous component into carbon dioxide gas and water to detoxify and deodorize directly. 35 lower temperature than combustion method
Since the deodorizing process can be performed at about 0 to 400 ° C., it can be operated with low fuel consumption. In addition, recently, a catalytic oxidation type heat storage type deodorization treatment device has been proposed which effectively reduces the running cost by effectively utilizing the heat of the treated exhaust gas at a relatively high temperature which has been deodorized by oxidative decomposition.

FIG. 2 shows such a catalytic oxidation type heat storage type deodorization treatment apparatus 51, which passes through the catalyst layer 52 for deodorizing the heated exhaust gas by oxidative combustion or thermal decomposition. A plurality of heat storage chambers Ha to Hc provided with a heat storage layer 53 that stores the heat of the high-temperature treated exhaust gas are provided in the burner 5
4 is arranged in parallel with the exhaust gas heating chamber 55.
Dampers 58, 59, 61 are provided in each of the heat storage chambers Ha to Hc.
An untreated exhaust gas inflow duct 56, a treated exhaust gas exhaust duct 57, and a purge duct 60 are connected to each other.

[0006] Here, after the untreated exhaust gas flowing from one heat storage chamber (for example, Ha) is preheated in the heat storage layer 53 and introduced into the exhaust gas heating chamber 55 to be heated, most of the high temperature exhaust gas is The catalyst layer 52 of the heat storage chamber (for example, Hb) is oxidatively burned or thermally decomposed to be deodorized, and when the high-temperature treated exhaust gas passes through the heat storage layer 53, its heat is recovered,
A part of the high-temperature exhaust gas heated in the exhaust gas heating chamber 55 is oxidatively burned or thermally decomposed in the catalyst layer 52 of another heat storage chamber (for example, Hc) to perform deodorization, and the heat storage chamber (for example, Hc) is also stored. The remaining untreated exhaust gas is caused to flow out and is returned to the heat storage chamber (for example, Ha) on the inflow side via the purge duct.

Therefore, each of the dampers 58, 59, 6
1, the ducts 56, 57, 60 are switched to sequentially use the heat storage chambers Ha to Hc alternately. For example, the untreated exhaust gas is caused to flow from the heat storage chamber Ha and the treated exhaust gas is stored in the heat storage chamber Hb.
The untreated exhaust gas discharged from the heat storage chamber Hc is returned to the heat storage layer Ha, and then the untreated exhaust gas is discharged from the heat storage chamber Hc.
b, the treated exhaust gas is discharged from the heat storage chamber Hc, and the untreated exhaust gas flowing out from the heat storage chamber Ha is stored in the heat storage layer Hb.
To the heat storage chamber Hc, the untreated exhaust gas is discharged from the heat storage chamber Ha, and the untreated exhaust gas flowing out of the heat storage chamber Hb is returned to the heat storage layer Hc. Exhaust gas can be deodorized.

In this case, the combustible and harmful malodorous components in the exhaust gas can be oxidatively burned or thermally decomposed at about 350 to 400 ° C. by a catalyst to deodorize, and the heat of the treated exhaust gas is stored in the heat storage layer 53. Thus, the treated exhaust gas of the untreated exhaust gas flowing into the exhaust gas heating chamber 55 is effectively used as a heat source for preheating when flowing into the exhaust gas heating chamber. That is, when the untreated exhaust gas passes through the heat storage chambers Ha to Hc and flows into the exhaust gas heating chamber 55, the heat storage chambers Ha to Hc.
Since the heat storage layer 53 is preheated to a temperature close to the treatment temperature, the burner 54 needs only to heat the untreated exhaust gas preheated to a temperature close to the treatment temperature to the treatment temperature, and therefore the running cost can be significantly reduced.

[0009]

However, in this type of heat storage type deodorization treatment apparatus, the heat recovered when the high temperature exhaust gas deodorized by the catalyst layer 52 passes through the heat storage layer 53,
When the untreated exhaust gas flows in, when it is used as a preheat source, the thermal efficiency is as high as η = 90 to 95%, so the untreated exhaust gas is preheated to a temperature close to the treatment temperature and flows into the exhaust gas heating chamber 55, and When the concentration of combustible harmful odorous components contained in exhaust gas in the presence of a catalyst is oxidatively burned or thermally decomposed, the reaction is accelerated if the concentration is high, and the reaction temperature becomes high, and even if the burner 54 is extinguished, the heating chamber Not only is the room temperature of 55 above the controllable upper limit temperature and becomes uncontrollable, but there is also the risk that the catalyst will deteriorate due to overheating and the processing capacity will decrease, shortening the product life.

For this reason, the outside air inlet 62 is formed in the exhaust gas inflow duct 56 for introducing the exhaust gas into the heat storage chambers Ha to Hc, and when the room temperature of the exhaust gas heating chamber 55 exceeds the upper limit temperature, the intake 62 is introduced. The damper 63 is opened to introduce outside air, and the temperature of the exhaust gas introduced into the heat storage chambers Ha to Hc is lowered to lower the room temperature of the exhaust gas heating chamber 55. In this case, the temperature of the exhaust gas is, for example, When the temperature is lowered to about 100 ° C., the harmful malodorous line components contained in the exhaust gas are aggregated and adhered to the surface of the heat storage layer 53 to generate so-called tars, which causes a new problem of clogging. . Therefore, the present invention, when the room temperature of the exhaust gas heating chamber exceeds a preset upper limit temperature, without causing the occurrence of tars accompanied by the temperature decrease of the exhaust gas, to reliably reduce the indoor temperature and catalyst deterioration. It is a technical issue to prevent it in advance.

[0011]

In order to solve this problem, the present invention provides a catalyst layer for deodorizing a combustible harmful malodorous component contained in heated exhaust gas by oxidative combustion or thermal decomposition, A plurality of heat storage chambers provided with a heat storage layer that stores the heat of the high-temperature treated exhaust gas that has passed through the catalyst layer, are arranged in parallel with the exhaust gas heating chamber having a burner, and each heat storage chamber is untreated. An exhaust gas inflow duct and a treated exhaust gas exhaust duct are connected, the respective heat storage chambers are sequentially and alternately used by switching the respective ducts, and the exhaust gas to be deodorized is introduced from one heat storage chamber and preheated in the heat storage layer. Then, after introducing into the exhaust gas heating chamber, in the heat storage type deodorization processing device configured to be discharged from the other heat storage chamber to the outside, in the heating chamber, a temperature sensor for detecting the room temperature is arranged. Along with An air supply duct for introducing external air into the heating chamber is connected, and the external air is heated when the indoor temperature of the heating chamber detected by the temperature sensor reaches a preset upper limit temperature. It is characterized in that an external air supply means for supplying the air to the room is provided.

According to this, for example, when the concentration of the combustible harmful malodorous component contained in the exhaust gas to be treated is high,
The reaction temperature at the time of oxidative combustion or thermal decomposition by the catalyst becomes high and the temperature of the exhaust gas heating chamber rises. Then, the room temperature of the heating chamber is set to a preset upper limit temperature (for example, 450
Temperature is detected by the temperature sensor, external air is directly introduced into the exhaust gas heating chamber via the air supply duct,
The temperature inside the exhaust gas heating chamber is lowered, and deterioration of the catalyst due to overheating is prevented. At this time, the external air is not directly introduced into the exhaust gas heating chamber from the exhaust gas inflow duct through the heat storage chamber, but is directly introduced into the exhaust gas heating chamber through the air supply duct. Is never reduced. Therefore, the harmful malodorous component contained in the exhaust gas does not aggregate, and does not become a resin and adhere to the surface of the heat storage layer. Even if external air is introduced into the exhaust gas heating chamber, the temperature inside the exhaust gas heating chamber is maintained at a predetermined processing temperature (for example, about 380 ° C.) higher than the temperature at which the tar is generated (about 100 ° C.). No tars are generated in the heating chamber.

[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.

In the figure, reference numeral 1 denotes a catalytic oxidation type heat storage type deodorization treatment device, which is a platinum-based, cobalt-based or nickel-based deodorization device for oxidizing and burning or thermally decomposing combustible harmful malodorous components in heated exhaust gas. A catalyst layer 2 formed of a catalyst such as
A plurality of heat storage chambers Ha to Hc provided with a heat storage layer 3 that stores the heat of the high-temperature gas that has passed through the catalyst layer 2 are arranged in parallel to the exhaust gas heating chamber 5 having the burner 4. And
An untreated exhaust gas inflow duct 6 is provided in each of the heat storage chambers Ha to Hc.
a to 6c, the treated exhaust gas discharge ducts 7a to 7c, and the purge ducts 8a to 8c are connected to each other, and the ducts 6a to 6 are connected.
c, 7a to 7c, 8a to 8c are provided with switching dampers 9a to 9
c, 10a to 10c, 11a to 11c are interposed.

Here, the exhaust gas to be deodorized is introduced from one heat storage chamber (for example, Ha) through the untreated exhaust gas inflow ducts 6a to 6c, and is preheated by the heat of the heat storage layer 3 in the exhaust gas heating chamber. After being introduced into No. 5 and heated, most of the high-temperature exhaust gas is subjected to oxidative combustion or thermal decomposition in the catalyst layer 2 of another heat storage chamber (for example, Hb) for deodorization treatment, and the high-temperature treated exhaust gas passes through the heat storage layer 53. Then, when it is discharged from the treated exhaust gas discharge ducts 7a to 7c to the outside, the heat is recovered and a part of the high temperature exhaust gas heated in the exhaust gas heating chamber 55 is used as a catalyst in another heat storage chamber (for example, Hc). Oxidative combustion or thermal decomposition is performed in the layer 52 to perform deodorization processing, and untreated exhaust gas remaining in the heat storage chamber (for example, Hc) is caused to flow out and is returned to the heat storage chamber (for example, Ha) on the inflow side via the purge ducts 8a to 8c. Let . Then, each of the switching dampers 9a
By switching between 9c, 10a to 10c, and 11a to 11c, the heat storage chambers Ha to Hc are sequentially and alternately used for continuous deodorization.

A temperature sensor S for detecting the temperature inside the exhaust gas heating chamber 5 is provided in the exhaust gas heating chamber 5, and an air supply duct 12 for introducing external air is formed in the vicinity of the burner 4. An auto-damper 13 is provided in the air supply duct 12, and the auto-damper 13 is opened / closed by a control signal from the opening / closing controller 14. In addition, the burner 4 arranged in the exhaust gas heating chamber 5
The combustion air supply duct 15 and the fuel gas supply pipe 16 are connected, and the combustion air supply duct 15 is connected to the blower 17 together with the air supply duct 12. An automatic damper 18 and a gas adjusting valve 19 are provided in the combustion air supply duct 15 and the fuel gas supply pipe 16, respectively, and the damper 18 and the adjusting valve 19 allow the combustion air and the fuel gas to reach a predetermined empty space. It is designed to open and close in conjunction with each other so that the fuel can be supplied while maintaining the fuel ratio.

The opening / closing control device 14 is connected to the temperature sensor S on the input side thereof, and is connected to the output side thereof on the motors 20 and 21 for opening and closing the auto dampers 13 and 18, for example, to heat the exhaust gas. The opening degrees of the automatic damper 18 and the adjustment valve 19 are adjusted so that the room temperature of the room 5 is maintained at a preset processing temperature (for example, 380 ° C.), and the room temperature is set at a preset upper limit temperature (for example, 450).
(° C), the automatic damper 13 of the air supply duct 12 is opened to introduce the external air into the exhaust gas heating chamber 5. Therefore, in the case of this example, the air supply duct 12
The external air feeding means A for feeding the external air into the exhaust gas heating chamber 5 via the is constituted by the opening / closing control device 14, the motor 20, the automatic damper 13 and the blower 17.

The untreated exhaust gas inflow ducts 6a-
6 c is formed by branching an exhaust gas duct 6 connected to an exhaust gas generation source, and the exhaust gas fed from the exhaust gas generation source to the exhaust gas duct 6 is passed through the heat storage chambers Ha to Hc to form an exhaust gas heating chamber 5 An air blower 22 that is pushed into is inserted. Further, the treated exhaust gas discharge ducts 7a to 7c are formed by being assembled into a single duct 7 on the downstream side thereof, and the purge ducts 8a to 8c are connected to the upstream side of the blower 22 interposed in the exhaust gas duct 6. Has been done.

The above is an example of the configuration of the present invention, and its operation will be described below. First, the untreated exhaust gas introduced into the exhaust gas heating chamber 5 from the heat storage chamber Ha is deodorized in the heat storage chamber Hb to be discharged, and a part of the untreated exhaust gas is discharged to the other heat storage chamber H.
The air in the heat storage chamber Hc is deodorized by the heat storage chamber Ha.
The untreated exhaust gas introduced into the exhaust gas heating chamber 5 from the heat storage chamber Hb to be deodorized and discharged in the heat storage chamber Hc, and a part thereof is deodorized in the other heat storage chamber Ha to perform the heat storage. The air in the chamber Ha is returned to the heat storage chamber Hb,
Further, the untreated exhaust gas introduced into the exhaust gas heating chamber 5 from the heat storage chamber Hc is deodorized in the heat storage chamber Ha and discharged, and a part of the untreated exhaust gas is deodorized in the other heat storage chamber Hb to be stored in the heat storage chamber Hb. Air is recirculated to the heat storage chamber Hc, and this is alternately switched every 60 seconds, for example.

Specifically, the switching dampers 9a, 10b, 1
When 1c is opened, the untreated exhaust gas is introduced into the exhaust gas heating chamber 5 through the heat storage chamber Ha, and after being heated to the processing temperature (380 ° C.), most of the high temperature gas is in the heat storage chamber Hb.
While being discharged to the treated gas discharge duct 7b via the, the high temperature gas is partly recirculated from the purge duct 8c to the exhaust gas duct 6 via the heat storage chamber Hc.

Since the untreated exhaust gas is preheated by the heat stored in the heat storage layer 3 when passing through the heat storage layer 3 of the heat storage chamber Ha, it is introduced into the exhaust gas heating chamber 5 at a temperature close to the treatment temperature. It Next, after being heated to the processing temperature by the burner 4 of the exhaust gas heating chamber 5, the high-temperature gas is oxidatively burned and deodorized when passing through the catalyst layer 2 of the heat storage chamber Hb.
At this time, since the combustible harmful malodorous component contained in the exhaust gas is oxidized and burned to generate heat, the deodorized treated exhaust gas is maintained at a high temperature even when passing through the catalyst layer 2 and passes through the heat storage layer 3. When discharged to the outside, the heat is collected in the heat storage layer 3. Further, a part of the high-temperature exhaust gas from the exhaust gas heating chamber 5 is supplied to the other heat storage chamber Hc, and a purge operation is performed in which the untreated exhaust gas remaining in the heat storage chamber Hc is returned to the upstream side of the exhaust gas duct 6.

When the switching dampers 9b, 10c, 11a are opened after 60 seconds have passed, for example, untreated exhaust gas flows from the heat storage chamber Hb whose heat storage has ended, and the heat storage chamber Hc whose purge operation has ended passes through the heat storage chamber Hc. Then, the treated exhaust gas is discharged, and the heat storage chamber Ha is purged so that the untreated gas remains inside the exhaust gas. When a further 60 seconds have passed, the switching dampers 9c, 10a, 11b are opened to switch the flow paths again, the exhaust gas is made to flow in from the heat storage chamber Hc, the exhaust gas is made to flow out via the heat storage chamber Ha, and the purge operation is performed in the heat storage chamber Hb. Then, the deodorizing process is continuously carried out by repeating this step.

During this time, the inside of the exhaust gas heating chamber 5 is treated at the treatment temperature (3
The combustion control of the burner 4 is performed by the control device 14 based on the detection signal of the temperature sensor S so as to be maintained at 80 ° C.), and when the room temperature is lower than the processing temperature, the automatic damper 18 and the adjustment valve 19 are opened. As a result, the fuel gas supply amount increases, and when the indoor temperature is higher than the processing temperature, the auto damper 18 and the adjustment valve 19 are throttled to reduce the fuel gas supply amount.

When the concentration of the combustible harmful odorous component contained in the untreated exhaust gas is high, the flame of the burner 4 of the exhaust gas heating chamber 5 is ignited and directly burned or flows into the exhaust gas heating chamber 5. Before starting, oxidation combustion or thermal decomposition is started in the catalyst layers 2 of the heat storage layers Ha to Hc on the inflow side, and the reaction temperature rises. Therefore, the auto damper 18 and the regulating valve 19 are completely shut off to extinguish the burner 4. However, the exhaust gas heating chamber 5 may overheat.

In this case, when the room temperature reaches a preset upper limit temperature (450 ° C.), the control signal output from the control device 14 opens the automatic damper 13 of the air supply duct 12 to heat the exhaust gas. Cold external air is introduced into the exhaust gas heating chamber 5 through the air supply duct 12 until the indoor temperature of the chamber 5 falls below the upper limit temperature. Therefore, when the indoor temperature of the exhaust gas heating chamber 5 rises, the external air is introduced and the indoor temperature is cooled to a temperature lower than the upper limit temperature, so that it is possible to prevent the catalyst from being overheated and deteriorated.

The external air is the exhaust gas inflow duct 6a.
6c is not introduced into the exhaust gas heating chamber 5 through the heat storage chambers Ha to Hc, but is introduced directly into the exhaust gas heating chamber 5 through the air supply duct 12, and thus is introduced into the heat storage chambers Ha to Hc. The exhaust gas temperature does not decrease, and therefore, organic components and tar contained in the exhaust gas do not aggregate and the tar does not adhere to the surface of the heat storage layer 3. Further, even if external air is introduced into the exhaust gas heating chamber 5 through the air supply duct 12, the indoor temperature of the exhaust gas heating chamber 5 is maintained at a predetermined processing temperature (for example, about 380 ° C.) higher than the temperature at which the tar is generated. Since the temperature does not drop to the temperature at which the tar is generated (for example, about 100 ° C.), the tar does not occur in the exhaust gas heating chamber 5.

In the above description, the exhaust gas heating chamber 5
The case where the air supply duct 12 for introducing outside air into the burner 4 is branched from the combustion air supply duct 15 for supplying the combustion air to the burner 4 and the blower 17 is shared is explained, but the present invention is not limited to this. Each of the ducts 12 and 15 may be provided independently and each may be connected to a separate blower. However, if the blower 17 is shared, it is not necessary to secure a space for installing a new blower.
The ducts are easy to handle, the equipment is simple, and the cost is low.

Further, the exhaust gas heating chamber 5 has three heat storage chambers Ha.
Although the case of arranging ~ Hc in parallel has been described, the number of heat storage chambers is arbitrary as long as it is two or more. For example, the two heat storage chambers may be arranged vertically with the exhaust gas heating chamber interposed therebetween. However, when there are two heat storage chambers, the inflow of the untreated exhaust gas and the discharge of the treated exhaust gas may be alternately performed, and the purge operation may be performed after the deodorization operation is completed or at a constant time interval.

[0029]

As described above, according to the present invention, when the indoor temperature of the exhaust gas heating chamber detected by the temperature sensor reaches the preset upper limit temperature, the exhaust gas heating chamber is supplied to the exhaust gas heating chamber via the air supply duct. Since the external air is directly introduced, the indoor temperature of the exhaust gas heating chamber is reliably lowered, and the deterioration due to overheating of the catalyst is prevented, which is a very excellent effect.
In addition, the temperature of the exhaust gas flowing into the heat storage chamber does not decrease, and the harmful malodorous components contained in the exhaust gas do not aggregate to form tars when the temperature decreases. Even if is introduced, the room temperature of the exhaust gas heating chamber is maintained at a predetermined processing temperature higher than the temperature at which the tar is generated, so that there is also an effect that the tar does not occur in the exhaust gas heating chamber.

[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 a conventional device.

[Explanation of symbols]

 1 ・ ・ Heat storage type deodorization treatment device 2 ・ ・ ・ ・ ・ ・ Catalyst layer 3 ・ ・ ・ ・ ・ ・ Heat storage layer Ha to Hc ・ ・ Heat storage chamber 4 ・ ・ ・ ・ ・ ・ ・ ・ Burner 5 ・ ・ ・ ・..Exhaust gas heating chamber 12 ... Air supply duct S ... Temperature sensor A ... External air supply means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenji Sumita 7800 Chihama, Daito-cho, Ogasa-gun, Shizuoka Prefecture Inside Cataler Industry Co., Ltd.

Claims (1)

[Claims] 1. A catalyst layer (2) for deodorizing a combustible and harmful malodorous component contained in heated exhaust gas by oxidative combustion or thermal decomposition, and high-temperature treated exhaust gas passing through this catalyst layer (2). A plurality of heat storage chambers (Ha to Hc) provided with a heat storage layer (3) that stores the heat of the above, and each heat storage chamber is provided in parallel with the exhaust gas heating chamber (5) having a burner (4). (Ha ~
Hc) is connected to untreated exhaust gas inflow ducts (6a to 6c) and treated exhaust gas exhaust ducts (7a to 7c).
(6a ~ 6c, 7a ~ 7c) by switching each heat storage chamber (Ha ~ H
After alternately using c) sequentially, the exhaust gas to be deodorized is introduced from one heat storage chamber (Ha to Hc), preheated in the heat storage layer (3) and introduced into the exhaust gas heating chamber (5). In the heat storage type deodorization treatment device configured to discharge from the other heat storage chambers (Ha to Hc) to the outside, a temperature sensor (S) for detecting the room temperature is provided in the heating chamber (5). At the same time, an air supply duct (12) for introducing external air into the heating chamber (5) is connected, and the heating chamber (5) detected by the temperature sensor (S) is connected to the air supply duct (12). Heat storage characterized by being provided with external air supply means (A) for supplying external air into the heating chamber (5) when the room temperature of 5) reaches a preset upper limit temperature. Type deodorization processing equipment.