JP2008045762A - Valve and heat storage type deodorizing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve having superior heat resistance and airtightness, and properly used in a continuous operation of a heat storage type deodorizing device, and to provide the heat storage type deodorizing device capable of continuing the operation for a long period while keeping good operating states without leakage of a gas to be treated. <P>SOLUTION: In this heat storage type deodorizing device comprising a plurality of heat storage areas stored with heat storage materials, and a heating treatment area communicated with the plurality of heat storage areas and treating the gas to be treated with heat, the heat storage areas are provided with valves constituted to introduce the gas to the heat storage areas or to discharge the gas from the heat storage areas, the valve comprises a packing and a valve element for keeping a valve closing state by being closely kept into contact with each other, and a heat insulating material is stacked on a device inner side face of the valve element. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention mainly relates to a heat storage deodorization apparatus for deodorizing a gas to be treated discharged from a factory or the like, and a valve used in the apparatus, and more particularly, an organic substance such as a volatile organic compound (hereinafter referred to as “VOC”). The present invention relates to a heat storage type deodorizing apparatus suitable for deodorizing a gas to be treated containing gas and a valve used in the apparatus.

  2. Description of the Related Art Conventionally, as a deodorizing device for a gas to be processed that is discharged from a factory or the like and contains VOC, a heat storage deodorizing device as disclosed in, for example, Patent Document 1 below is known. That is, the conventional heat storage deodorization apparatus is generally configured to include a combustion region for burning the gas to be processed and a plurality of heat storage regions for preheating the gas to be processed to be introduced into the combustion region. In the heat storage region, for example, a honeycomb-shaped heat storage material is accommodated as a heat storage material, and on the other hand, in the combustion region, a heating device for raising the gas to be treated in the combustion region to a predetermined temperature (For example, a burner) is provided.

The heat storage deodorization apparatus is operated so that the gas to be treated passes through any one heat storage region and is introduced into the combustion region, heat-treated in the combustion region, and then discharged from the other heat storage region as an outlet. Is. The heat storage material accommodated in the heat storage area serving as the outlet gradually increases in temperature when the operation is continued for a while, so the heat storage area serving as the inlet and the heat storage area serving as the outlet are sequentially switched every predetermined time, and the heat storage material becomes high temperature. It operates so that to-be-processed gas may be introduce | transduced from an area | region.
As described above, the heat storage deodorizing apparatus minimizes the amount of heat that is taken out by the treated gas after treatment, and effectively uses the heat for heating the treated gas before treatment. Is to do.

Japanese Patent Laid-Open No. 9-264521

As described above, the heat storage deodorization apparatus needs to be operated by switching the flow of the gas to be processed every predetermined time so that the plurality of heat storage regions function alternately as inlets or outlets. The flow of the gas to be processed is switched by using the valve that has been set.
That is, the heat storage type deodorization apparatus is usually provided with an inlet valve between the supply side duct to which the gas to be processed is supplied and the heat storage region, and the discharge side duct for discharging the gas to be processed and the heat storage region. An outlet valve is provided in between, and the flow state of the gas to be processed is controlled by opening and closing the inlet valve and the outlet valve.

These valves used in the heat storage deodorization device are preferably airtight from the viewpoint of preventing leakage of the gas to be treated, and these valves define a heat storage region that becomes high temperature. Therefore, there exists a problem that airtightness falls easily by the influence by the heat.
In addition, since this type of regenerative deodorization device is often operated continuously over a long period of time, even when such continuous operation is performed over a long period of time, maintenance such as component replacement is not required. Therefore, there is a demand for a heat storage type deodorizing apparatus that can continue a good operation state without leaking the gas to be treated.

  In view of such problems, an object of the present invention is to provide a valve that is excellent in heat resistance and airtightness and can be suitably used for continuous operation of a heat storage deodorization apparatus. Another object of the present invention is to provide a regenerative deodorizing apparatus capable of continuing the operation for a long period of time while achieving a good operation state without leaking the gas to be treated. To do.

In order to solve the above problems, the present invention provides a heat storage deodorizing apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that communicates with the plurality of heat storage regions and heat-treats the gas to be processed. A valve for introducing gas into the heat storage region or discharging gas from the heat storage region,
There is provided a valve characterized by comprising a packing and a valve body which are brought into a closed state by being pressed against each other, and a heat insulating material is laminated on the inner surface of the valve body.
Here, the device inner surface of the valve body refers to a surface facing the inside of the heat storage deodorization device in the valve body that partitions the inside and the outside of the heat storage deodorization device.

  According to the valve having such a configuration, since the valve body and the packing which are brought into a closed state by being pressed against each other are provided, the airtightness is excellent, and the heat insulating material is laminated on the inner surface of the valve body. Thus, the temperature rise of the valve body facing the heat storage region is suppressed, and the temperature rise of the packing pressed against the valve body is also suppressed. Therefore, for example, the packing is made of a heat-resistant material that is not harmful to the human body and has a relatively low heat resistance without using a heat-resistant material that has high heat resistance such as asbestos but is harmful to the human body. However, since the temperature rise of the packing is suppressed, the packing does not deteriorate even when used for a long time. Therefore, the regenerative deodorization apparatus provided with such a valve can be continuously operated for a long period of time while maintaining a predetermined performance.

Further, the present invention provides a gas in the heat storage region of a heat storage deodorizing apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated and a heat treatment region that is in communication with the plurality of heat storage regions and heat-treats the gas to be processed. Or for discharging gas from the heat storage region,
The valve body is provided with a packing and a valve body that are brought into a valve-closed state by being pressed against each other. The valve body is formed with a flow path through which a cooling gas is conducted, and the cooling gas supplied through the flow path is A valve is provided that is configured to be discharged from a peripheral portion of a valve body to the heat storage region.

  According to the valve having such a configuration, since the valve body is provided with a packing and a valve body that are brought into a closed state by being pressed against each other, the valve body has excellent airtightness, and the valve body has a flow path through which cooling gas is conducted. The cooling gas formed and supplied through the flow path is configured to be discharged from the peripheral portion of the valve body to the heat storage region, so that only a rise in temperature of the valve body is suppressed. In addition, the temperature rise from the side surface of the packing facing the heat storage region is also suppressed, and the synergistic action of these can prevent the temperature rise of the packing extremely effectively. Therefore, for example, when the packing is made of a heat-resistant material that is not harmful to the human body and has a relatively low heat resistance without using a heat-resistant material that has high heat resistance such as asbestos but is harmful to the human body. However, since the temperature rise of the packing is extremely effectively suppressed, the packing does not deteriorate even when used for a long time. Therefore, the regenerative deodorization apparatus provided with such a valve can be continuously operated for a long period of time while maintaining a predetermined performance.

  Further, the present invention is a heat storage deodorization apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that is in communication with the plurality of heat storage regions and heat-treats the gas to be processed. The region is provided with a valve configured such that gas can be introduced into the heat storage region or gas can be discharged from the heat storage region. A heat storage deodorizing device is provided, characterized in that a heat insulating material is laminated on the inner surface of the valve body.

  According to the heat storage type deodorizing apparatus having such a configuration, the gas to be treated is prevented from leaking by using a valve having excellent airtightness including a packing and a valve body that are brought into a closed state by being pressed against each other. And can exhibit excellent deodorizing performance. In addition, by providing a heat insulating material on the inner surface of the valve body, the temperature rise of the valve body facing the heat storage region is suppressed, and the temperature rise of the packing pressed against the valve body is increased. Will also be suppressed. Therefore, for example, the packing is made of a heat-resistant material that is not harmful to the human body and has a relatively low heat resistance without using a heat-resistant material that has high heat resistance such as asbestos but is harmful to the human body. However, the temperature rise of the packing is suppressed, and the packing does not deteriorate even when used for a long time. Therefore, the regenerative deodorization apparatus provided with such a valve can be continuously operated for a long period of time while maintaining a predetermined performance.

  Further, the present invention is a heat storage deodorization apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that is in communication with the plurality of heat storage regions and heat-treats the gas to be processed. The region is provided with a valve configured so that the gas to be treated can be introduced into the heat storage region or the gas to be treated can be discharged from the heat storage region. The valve body is formed with a flow path through which the cooling gas is conducted, and the cooling gas supplied through the flow path is discharged from the peripheral portion of the valve body to the heat storage region. Provided is a heat storage deodorizing device characterized by being configured as described above.

  According to the heat storage type deodorizing apparatus having such a configuration, the gas to be treated is prevented from leaking by using a valve having excellent airtightness including a packing and a valve body that are brought into a closed state by being pressed against each other. And can exhibit excellent deodorizing performance. Further, the valve body is formed with a flow path through which cooling gas is conducted, and the cooling gas supplied through the flow path is discharged from the peripheral portion of the valve body to the heat storage region. As a result, the valve body is cooled by the cooling gas, and the temperature rise of the packing pressed against the valve body can also be suppressed. Further, the cooling gas discharged from the peripheral edge of the valve body to the heat storage region suppresses the contact between the gas to be processed and the packing that has become high temperature in the heat storage region, and the packing of the packing by the gas to be processed Temperature rise and deterioration are suppressed. The regenerative deodorization apparatus having such a configuration enables a long-term continuous operation while maintaining a predetermined performance.

  Furthermore, the present invention is a heat storage deodorizing apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that communicates with the plurality of heat storage regions and heat-treats the gas to be processed. The region is provided with a valve configured so that the gas to be treated can be introduced into the heat storage region or the gas to be treated can be discharged from the heat storage region. The valve body is provided with a heat insulating material laminated on the inner surface of the valve body, and further, the valve body is formed with a flow path through which a cooling gas is conducted. The regenerative deodorizing apparatus is characterized in that the supplied cooling gas is discharged from the peripheral portion of the valve body to the heat storage region.

  That is, according to the heat storage type deodorizing apparatus having such a configuration, the action of the heat insulating material laminated on the inner surface of the valve body as described above and the peripheral edge of the valve body through the flow path formed in the valve body. The action of the cooling gas discharged from the section to the heat storage region is synergistically exhibited. Therefore, the heat storage deodorizer can continue the operation for a long period while maintaining a good operation state without leakage of the gas to be treated.

  Thus, according to the present invention, it is possible to provide a valve that is excellent in heat resistance and air tightness and can be suitably used for continuous operation of a heat storage deodorizing apparatus. Further, according to the present invention, it is possible to provide a regenerative deodorizing apparatus capable of continuing the operation for a long time while achieving a good operation state without leaking the gas to be treated. Become.

Hereinafter, the valve and the heat storage deodorizing apparatus according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a flow diagram showing an aspect of the flow of the gas to be treated in the heat storage deodorization apparatus of the first embodiment of the present invention. The heat storage deodorization apparatus 1 includes a combustion chamber 2 that heats the gas to be treated 5 as a heat treatment region and oxidizes and decomposes organic matter such as VOC contained in the gas to be treated. It comprises three heat storage layers 3 provided with materials, and is configured as a so-called three-column heat storage deodorization device.

As shown in FIG. 1, the heat storage region 3 includes a heat storage material 35 for performing heat exchange with the gas to be processed 5. As the heat storage material 35, for example, a ceramic heat storage material in which a honeycomb-shaped gas flow passage is formed is preferably used.
In addition, an inlet valve 11 and an outlet valve 21 are provided below the heat storage region 3, respectively. This inlet valve 11 makes the supply side duct 12 which supplies the to-be-processed gas 5 to this thermal storage deodorizing apparatus 1 and the said thermal storage area | region 3 into a communication state or interruption | blocking state. Moreover, this exit valve 21 makes the discharge side duct 22 which discharges | emits the to-be-processed gas 5 processed by this thermal storage type deodorizing apparatus 1, and the said thermal storage area | region 3 to a communication state or interruption | blocking state.

  Here, FIG. 2 shows a cross-sectional view of the inlet valve 11 and the outlet valve 21 in the present embodiment. As shown in FIG. 2, the inlet valve 11 and the outlet valve 21 in the present embodiment are configured as poppet valves that can move in parallel in the direction in which the entire valve body approaches and separates from the valve seat. . That is, the inlet valve 11 and the outlet valve 21 in the present embodiment include a valve box 51 in which an opening 51a is formed with respect to the heat storage region 3, and a valve body that opens or closes the opening 51a. 52, a valve rod 53 provided substantially perpendicular to the valve body 52, a driving device 54 for moving the valve rod 53, and the opening 51a to be in pressure contact with the valve body 52 in a closed state. And an annular packing 55 fixed to the head.

Further, a heat insulating material 56 is laminated on the inner surface 52a of the valve body 52, that is, on the surface facing the inner side of the heat storage deodorizer. In the present embodiment, the heat insulating material 56 is formed so as to cover the entire one surface of the valve body 52, but the shape, thickness, material, and the like of the heat insulating material are not particularly limited.
As the heat insulating material, for example, a blanket type heat insulating material in which ceramic fibers mainly composed of alumina (Al ₂ O ₃ ) or silica (SiO ₂ ) are processed into a sheet shape, and the blanket type heat insulating material are laminated. A block type or board type heat insulating material formed by compression molding into a plate shape, and a heat insulating material in which a heat resistant inorganic coating agent having the same main component as the heat insulating material is applied to the surface of these heat insulating materials. Can do.
Among these heat insulating materials, those having a density of 160 to 300 kg / m ³ , a heat resistant temperature of 1000 to 1400 ° C., and a thermal conductivity at 600 ° C. of 0.1 to 0.15 W / m · K are preferable. A block type or board type having these characteristics, or a heat insulating material to which the heat-resistant inorganic coating agent is applied is more preferable.

  The driving device 54 can move the valve rod 53 in the axial direction so that the valve body 52 approaches and separates from the opening 51a. In this embodiment, the driving device 54 includes an air cylinder. The drive device is employed.

The annular packing 55 is preferably one that is elastically deformed when the valve body 52 is close to the opening 52a so that the valve has sufficient airtightness, and is also heat resistant. It is preferable that it is excellent. Moreover, what was comprised without using a material harmful to human bodies, such as asbestos, is preferable.
As the packing 55, for example, a base material obtained by impregnating a graphite knitted base material with expanded graphite or a tetrafluoroethylene resin, alumina (Al ₂ O ₃ ), or silica (SiO ₂ ) is mainly used. A material obtained by weaving ceramic fibers as components together with organic fibers or metal fibers can be preferably used.

  The valve body 52 and the valve rod 53 are formed with a flow path 60 through which a cooling gas can flow, and the cooling gas supplied through the flow path 60 is discharged to the periphery of the valve body 52. A gas discharge hole 61 that can be made is formed.

  More specifically, as shown in FIGS. 2 to 4, the valve stem 53 is configured by using a hollow shaft, and the inside of the hollow shaft is configured to function as a cooling gas flow path 60. A cooling gas supply port 62 for supplying a cooling gas to the flow path 60 is formed at the end of the valve stem 53 on the driving device side, and a valve body 52 is formed at the end of the valve stem 53 on the valve body side. A communication port 63 through which the cooling gas flows to the flow path 60 is formed. A flexible pipe 70 is connected to the cooling gas supply port 62 so that the cooling gas can be supplied even if the valve rod is reciprocated by a driving device.

  On the other hand, a flow path 60 for circulating a cooling gas is also formed inside the valve body 52, and one end of the flow path 60 communicates with the communication port 63 formed in the valve rod. The other end of 60 is communicated with a gas discharge hole 61 through which cooling gas can be discharged from the valve body 52. The gas discharge holes 61 are preferably formed at equal intervals along the peripheral edge portion 52b of the valve body 52, for example, over the entire circumference of the valve body 52 at an interval of 5 to 15 ° with the valve rod 53 as the center. The The gas discharge hole 61 is preferably formed on the side where the valve body 52 is in contact with the packing 55, that is, the surface 52c opposite to the surface on which the heat insulating material is laminated.

  The cooling gas can be supplied, for example, via a compressor or the like (not shown). When an air cylinder is used as the driving device 54 as in the present embodiment, the compressor provided for the air cylinder is shared. be able to.

  The cooling gas can always be discharged, and can be discharged intermittently as the temperature of the valve body 52, packing 55, etc. rises. Moreover, it is also possible to discharge only in the state where the valve body 52 and the packing 55 are in pressure contact, that is, in the closed state. The air speed and air volume of the discharged cooling gas are not particularly limited, and can be appropriately adjusted according to the temperature of the valve body, packing, etc., and the temperature of the cooling gas.

  The heat storage deodorization apparatus 1 having such a configuration introduces the gas 5 to be treated into the combustion chamber 2 using any one of the three heat storage layers 3 as an inlet, and the other heat storage layer. The gas to be processed 5 is operated so as to be discharged from the combustion chamber 2 using 3 as an outlet. Further, in the three-column heat storage deodorization apparatus 1 as in the present embodiment, the purge gas is usually supplied to the remaining one heat storage layer 3, and organic substances remaining in the heat storage layer 3 are removed. Then, the heat storage layer 3 serving as an inlet, the heat storage layer 3 serving as an outlet, and the heat storage layer 3 to be purged are operated so as to be switched periodically.

  5 to 7 specifically show the operation states (flow patterns) that are periodically switched in this way. The state (flow pattern 1) shown in FIG. 5 will be described as an example. The treated gas 5 is introduced into the combustion chamber 2 with the first heat storage layer 31 (left side in FIG. 5) as an inlet, and the combustion is performed. An organic substance such as VOC is oxidized in the chamber 2, and the treated gas 5 is discharged from the second heat storage layer 32 (center in FIG. 5) as an outlet and is sent downstream by the exhaust fan 6. The purge gas 7 is supplied to the third heat storage layer 33 (right side in FIG. 5) by the purge blower 8.

  Similarly, in the state shown in FIG. 6 (flow pattern 2), the second heat storage layer 32 is the inlet, the third heat storage layer 33 is the outlet, and the first heat storage layer 31 is purged, as shown in FIG. In this state (flow pattern 3), the third heat storage layer 33 is the inlet, the first heat storage layer 31 is the outlet, and the second heat storage layer 32 is purged, and the processing of the gas 5 to be processed is performed.

If the operation is continued for a long period of time, dust and non-volatile components in the gas to be treated 5 accumulate on the heat storage material 35, and thus the heat storage material is baked out (burned) as necessary.
In the bake-out operation, for example, when the heat storage material 35 provided in the third heat storage layer 33 is baked out, the first heat storage layer 31 and the second heat storage layer 32 alternately enter or By switching and operating as an outlet, the lower part of the heat storage material 35 provided in the third heat storage layer 33 is heated to about 400 to 500 ° C., and this state is continued for several hours.

  According to the heat storage type deodorizing apparatus having such a configuration, since the heat insulating material 56 is laminated on the inner surface 52a of the valve body 52 in each of the inlet valve 11 and the outlet valve 21, the heat storage type deodorizing apparatus is provided. During normal operation and bake-out operation, heat transfer due to radiation from the heat storage material and temperature rise on the valve body surface due to heat transfer due to contact with the gas to be processed that has become high can be suppressed. And as a result of suppressing the temperature rise of a valve body, deterioration of packing will be prevented.

  For example, when the heat insulating material 56 having a thickness of 100 to 150 mm made of ceramic fibers mainly composed of alumina or silica is laminated on the entire surface of the valve body 52, the above-described baking out operation is performed. Even when this is performed, the temperature of the lower surface of the valve body 52 can be kept at about 100 to 150 ° C. or lower.

  In addition, when a block type or board type heat insulating material or a heat insulating material coated with the heat-resistant inorganic coating agent is used, organic substances such as VOC contained in the gas to be processed 5 before heat treatment, Adhering to the heat insulating material 56 can be prevented, and there is an effect that leakage of the gas to be processed can be prevented more reliably.

  Further, when the cooling gas is always discharged in the valve-closed state, the cooling gas can also function as a purge gas, and the purge gas as described above becomes unnecessary. That is, the flow pattern 1 shown in FIG. 3 will be described as an example. In the third heat storage layer 33, the inlet valve 11 and the outlet valve 21 are both closed, and both valve bodies 52 are in the closed state. Since the cooling gas discharged from the gas gradually replaces the gas to be processed 5 accumulated in the heat storage layer 3, there is an effect that it is not necessary to supply the purge gas 7 separately.

  In addition, in the said embodiment, although the case where a poppet valve was employ | adopted as an inlet valve and an outlet valve was demonstrated, this invention is not limited to this, For example, it shall be a flap valve and other types of valves Is also possible.

  Moreover, in the said embodiment, although the 3 tower type thermal storage deodorizing apparatus was mentioned and demonstrated as an example, this invention is not limited to this, Other types of thermal storage, such as a 2 tower type and a rotation type, are described. It is also possible to use a type deodorizing device.

The figure which showed the flow state of the to-be-processed gas in one Embodiment of a thermal storage type deodorizing apparatus. Sectional drawing which showed the specific structure of the valve in a valve closing state in one Embodiment of the thermal storage type deodorizing apparatus which concerns on this invention. The figure which expanded and showed the valve body part in the valve shown in FIG. Sectional drawing which showed the valve opening state of the valve shown in FIG. The figure which showed the flow pattern 1 of to-be-processed gas in the thermal storage type deodorizing apparatus of embodiment. The figure which showed the flow pattern 2 of to-be-processed gas in the thermal storage type deodorizing apparatus of embodiment. The figure which showed the flow pattern 3 of to-be-processed gas in the thermal storage-type deodorizing apparatus of embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal storage deodorizing device 2 Combustion chamber 3 Thermal storage area 5 Gas to be processed 11 Inlet valve 21 Outlet valve 52 Valve body 53 Valve rod 54 Driving device 55 Packing 56 Insulating material 60 Channel 61 Gas discharge hole

Claims (5)

Gas is introduced into or stored in the heat storage region of a heat storage deodorization apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that communicates with the plurality of heat storage regions and heat-treats the gas to be processed. A valve for exhausting gas from the area,
A valve comprising a packing and a valve body that are brought into a valve-closed state by being pressed against each other, and a heat insulating material is laminated on the inner surface of the valve body.
Gas is introduced into or stored in the heat storage region of a heat storage deodorization apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that communicates with the plurality of heat storage regions and heat-treats the gas to be processed. A valve for exhausting gas from the area,
The valve body is provided with a packing and a valve body that are brought into a valve-closed state by being pressed against each other. The valve body is formed with a flow path through which a cooling gas is conducted, and the cooling gas supplied through the flow path is A valve configured to be discharged from a peripheral portion of a valve body to the heat storage region.
A heat storage deodorizing apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that is in communication with the plurality of heat storage regions and heat-treats the gas to be processed.
The heat storage region is provided with a valve configured such that gas can be introduced into the heat storage region or gas can be discharged from the heat storage region,
The valve is provided with a packing and a valve body that are brought into a closed state by being pressed against each other, and a heat insulating material is laminated on the inner surface of the valve body. Type deodorizer.
A heat storage deodorizing apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that is in communication with the plurality of heat storage regions and heat-treats the gas to be processed.
The heat storage region is provided with a valve configured so that the gas to be processed can be introduced into the heat storage region or the gas to be processed can be discharged from the heat storage region,
The valve includes a packing and a valve body that are brought into a closed state by being pressed against each other,
The valve body is formed with a flow path through which the cooling gas is conducted, and the cooling gas supplied through the flow path is discharged from the peripheral portion of the valve body to the heat storage region. A heat storage deodorizing device.
A heat storage deodorizing apparatus comprising a plurality of heat storage regions in which a heat storage material is accommodated, and a heat treatment region that is in communication with the plurality of heat storage regions and heat-treats the gas to be processed.
The heat storage region is provided with a valve configured so that the gas to be processed can be introduced into the heat storage region or the gas to be processed can be discharged from the heat storage region,
The valve includes a packing and a valve body that are brought into a closed state by being pressed against each other, and a heat insulating material is laminated on the inner surface of the valve body, and the valve body The heat storage is characterized in that a flow path through which the cooling gas is conducted is formed, and the cooling gas supplied through the flow path is discharged from the peripheral portion of the valve body to the heat storage region. Type deodorizer.

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