JPS6253657A - Deodorizing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deodorizing device. More specifically, the present invention relates to a deodorizing device used to remove bad odors caused by fermentation gas, oxidizable sulfur compounds in human waste treatment plants, sewage treatment plants, livestock farms, etc.

[Conventional technology] Foul odors generated at human waste treatment plants, sewage treatment plants, and nursing homes have become a social problem, and the major odor components are nitrogen compounds such as ammonia, methylamine, and trimethylamine, and hydrogen sulfide. It is a sulfur-containing compound such as , methyl mercaptan, methyl sulfide, methyl disulfide, and carbon disulfide, and also contains small amounts of unsaturated hydrocarbons and unsaturated aldehydes. Among these, nitrogen compounds are basic and can be removed by methods such as acid washing, but sulfur compounds are difficult to remove and have a particularly strong odor, causing intense disgust even at low concentrations of 10 ppm or less. It has been known.

Various techniques have been developed to remove bad odors generated in human waste treatment plants, sewage treatment plants, foster homes, etc.

It is difficult to purify most of the above-mentioned malodorous components at concentrations as low as ppm to the extent that the malodor is not perceptible, and a device that efficiently and economically removes malodors has not yet been put into practical use.

[Problems to be Solved by the Invention] The present invention solves the above problems and provides an apparatus for effectively and economically deodorizing oxygen-containing gases containing oxidizable sulfur compounds by photo-oxidative decomposition. The purpose is to

Another object of the present invention is to provide a deodorizing device in which the reaction chamber is detachable for easy maintenance and has high deodorizing efficiency.

[Means for Solving the Problems] The deodorizing device of the present invention includes a base, an electric lamp attached to the base that generates ultraviolet rays, and a reaction chamber having a peripheral wall that can surround the electric lamp. a guide fin fixed inside the reaction chamber for guiding the gas to be treated from the inlet to the outlet of the reaction chamber, and a titanium oxide or It consists of a single or mixed metal oxide layer of zinc oxide and a blower fan attached to the entrance of the reaction chamber, and the reaction chamber is detachably attached to the base.

[Function] The present inventors have been conducting research on excitation chemistry using ultraviolet rays for some time, and as a development of that basic research, we have discovered that titanium oxide or zinc oxide, alone or as a mixed metal oxide, coexists with oxidizable sulfur compounds. In that case, the wavelength is 20Or+
The present invention was completed by discovering that the decomposition reaction of oxidizable sulfur compounds occurs efficiently by irradiation with near-ultraviolet rays of m or more.

The principle of action of titanium oxide or zinc oxide alone or mixed metal oxide in the present invention is currently under detailed research, but electrons in the valence band in n-type semiconductors such as titanium oxide and zinc oxide absorb ultraviolet rays. to excite the conduction band,
The hole generated in the valence band oxidizes the surface hydroxyl group of the metal oxide layer with one electron to generate OH radical, and this radical oxidizes the oxidizable sulfur compound to produce sulfur dioxide, sulfur acid anhydride, and carbon dioxide. It is presumed that it is easily converted into water, etc.

Therefore, when the deodorizing device of the present invention is turned on to irradiate ultraviolet rays in a gas to be treated containing oxidizable sulfur compounds and oxygen, the oxidizable sulfur compounds in the gas to be treated are sulfur dioxide, sulfur acid anhydride, sulfur dioxide, etc. Easily decomposed into carbon, water, etc.

The decomposition products obtained by the above action do not need to be particularly removed if they are in minute concentrations.

In addition, if the concentration is high, it can be easily removed by conventional methods such as washing with a neutral or alkaline aqueous solution or adsorption with a basic solid.

In particular, the feature of the present invention is that it can effectively oxidize and decompose sulfur compounds at extremely low concentrations of 1 ppm or less, and this is the basis for removing bad odors.

By the way, the metal oxide layer provided in the reaction chamber is chemically durable for a long period of time, but after a certain period of use, dust etc. adhere to the surface and the activity decreases, resulting in poor oxidative decomposition ability of sulfur compounds. It becomes like this. In the present invention, since the reaction chamber can be detachably attached to the base,
By replacing only the reaction chamber, it is possible to easily reproduce the deodorizing device with a new highly active metal oxide layer, thus permanently maintaining high deodorizing ability.

The gas to be treated is forced into the reaction chamber by a blower fan, but by using multiple guide fins in the reaction chamber, the flow of the gas to be treated is gently bent. When this is done, the time for the gas to be treated to contact and react with the metal oxide layer is increased, resulting in higher deodorizing efficiency, and the pressure drop when the gas to be treated passes through the reaction chamber is also small, so Oma's exposure to Processing gas can be processed efficiently.

[Embodiment] Next, a deodorizing device according to an embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of a deodorizing device according to an embodiment of the present invention, FIG. 2 is a cutaway plan view of essential parts of the deodorizing device shown in FIG. 1, and FIG. 3 is a reaction diagram shown in FIG. 1. Perspective view of main parts of the room, No. 4
The figure is a perspective view with the bottom of the reaction chamber facing upward, FIG. 5 is an explanatory diagram of the support structure of the metal oxide layer, and FIG. 6 is a perspective view showing the state in which the fiber layer is attached to the support substrate. Figures 7 to 1
FIG. 0 is an explanatory view showing other embodiments of the reaction chamber and guide fins, respectively.

In Figure 1, (1) is a base, (2 is an electric lamp that can generate ultraviolet rays, (3) is a reaction chamber, (4) is a guide fin, (5 is a
) is a blower fan, and (6) is a cover.

The base (1) may have any form as long as it holds the reaction chamber (3) and the blower fan (5) and can be easily installed in a place where an odor is generated. A rectangular platform with four ribs divided into three parts is used. The three parts are, from the left side in the figure, an inlet part (1a), a processing part (1b), and an outlet part (
1C), the inlet section (1a) is equipped with a blower fan (5), and the processing section is equipped with an electric light (2) and a reaction chamber (1C).
3) and can be attached respectively.

The blower fan (5) sucks the gas to be treated and blows it into the reaction chamber (3).
) Any device can be used without any particular restrictions as long as it can force air into the room, but it is preferable to use one that is as small and highly efficient as possible in order to make the deodorizing device more compact.

The electric lamp (2) may be of any type as long as it emits light including ultraviolet rays, and the ultraviolet rays it emits may be far ultraviolet rays or near ultraviolet rays. Examples of such electric lights include fluorescent lamps, extra-high pressure mercury lamps, xenon lamps, high-pressure mercury lamps, low-pressure mercury lamps, and extra-low-pressure mercury lamps. These electric lights may be used alone or two or more lights may be arranged in parallel.

Furthermore, an improved electric lamp may be used in which a third component in addition to mercury coexists in the discharge tube so as to emit ultraviolet rays having a specific wavelength distribution.

Note that the electric lamp (2) can be one that emits both far and near ultraviolet rays, but from the point of view of power efficiency, it is recommended that the wavelength is 20Or+n.
It is preferable to use a device that emits near ultraviolet rays of + or higher, such as a germicidal lamp.

In other words, deep ultraviolet rays, called vacuum ultraviolet rays, are generated by discharge excitation of low-pressure mercury vapor in a high-purity quartz tube, but the generation efficiency is low, and germicidal lamps, on the other hand, are usually made from edge-purity quartz tubes or Short-wavelength near ultraviolet rays with a wavelength of 254r+m, called germicidal radiation, can be generated with relatively high efficiency by discharge excitation of low-pressure mercury vapor in a special glass tube doped with barium or the like. Furthermore, high-pressure mercury lamps and ultra-high-pressure mercury lamps can not only emit long-wavelength near-ultraviolet light with a dominant wavelength of 365 nm with high efficiency, but even if glass is used instead of quartz, it will be absorbed by the tube wall. It has the advantage of being able to extract near-ultraviolet rays.

The guide bar (6) is placed over the top of the base (1) and fixed with any fastening means such as screws, so as to cover the entire device. and the inlet portion (1a) of the cover (6).
The portion corresponding to the portion is configured to have a shape that allows the gas to pass through, such as a mesh or porous shape, or a filter with low pressure loss is attached. In addition, the portion of the cover (6) corresponding to the outlet portion (1C) is configured to have a gas-permeable shape such as a mesh or porous shape so that the treated gas can pass through, or a filter with low pressure loss is provided. It will be installed.

Next, the reaction chamber (3) will be described in detail with reference to FIGS. 2 to 4. The reaction chamber (3) includes the electric lamp (2).
Any type of material may be used as long as it has a peripheral wall that can surround the base (1), is detachably attached to the base (1), and allows the gas to be processed to pass through. Since (2) has an elongated shape, a hollow container with a kamabot-shaped bottom is used.

To explain its shape based on FIG. 4, (3a) is a bottom plate, (3b) is a gutter-like plate, (3C) is a side plate at both ends, and the inside is hollow. The bottom plate (3a) is provided with a long hole (3d) having a similar shape to the electric lamp (2), through which the electric lamp (2) passes during attachment and detachment. Entrance side plate (3C)
An inlet (Be) is bored in the hole, and an outlet (3t) is bored in the side plate (3C) on the outlet side.

The bottom plate (3a) is provided with edges (3g) on both sides in the longitudinal direction, and an appropriate number of screw holes (3h) for passing screws are provided in the edges (3g). The reaction chamber (3) having such a configuration has screws (31) as shown in FIG.
It can be removably attached to the processing section (1b) of the base (1) by screwing it in. In this embodiment, as described above, the reaction chamber (3) is configured to be detachable by fastening the screws, but the configuration is not limited to this. For example, the HB2 can be attached using an appropriate buckle.
It may be made freely, and any configuration may be used as long as it can be attached and detached.

Figure 3 shows the reaction chamber (3) seen through the cover plate (3b).
The inside of is shown. Note that the electric light shown in the figure (a is the one that is attached to the base (1)).

They are illustrated to clarify the mutual positional relationship. Third
As is clear from the figure, the inner surfaces of the bottom plate (3a) and the cover plate (3b) constitute a peripheral wall surrounding the electric light (2).

The guide fin (4) is fixed to the bottom plate (3a) inside the peripheral wall and around the electric lamp ('2J). The gas to be treated is transferred from the inlet (3e) to the outlet (3t
) and gently bends the flow of the gas to be treated in the reaction chamber (3) to prolong the contact reaction time with the metal oxide layer. Although it may take any form, this embodiment has the following configuration. In other words, the guide fins (4) shown in FIG.
b) and (4e) are composed of seven sheets. fin(
Both the fins 4a) and the fins (4b) have their lower edges fixed to the bottom plate (3a), and an appropriate gap is provided between their arcuate upper ends and the inner wall of the cover plate (3b).

First, to explain the arrangement of the fins (4a) and (4b) in the region from the entrance (3e) to the center of the reaction chamber (3), one large fin (4a) is placed in the hollowed out part. It is arranged obliquely to the longitudinal direction of the reaction chamber (3) so that the electric light (2) passes through it. However, that fin (
The front edge (4C) of 4a) is located near the inlet (3e) and one side wall, and the rear edge (4d) is located approximately in the center (reaction chamber (
3) located near the other side wall in the longitudinal direction). Three small fins (4b) are used, one between the fin (4a) and the one side wall, and the other two.
The plates are arranged between the fins (4a) and the other side wall so as to be parallel to the fins (4a). Between the center of the reaction chamber (3) and the outlet (3f), fins (4a) and (4b) of the same shape and the same number are arranged around the center and the fins (4a) of the inlet side.
) and (4b), and one small fin (4e) is arranged almost symmetrically with fins (4a) and fins (4b).
are placed parallel to each other.

In this way, most of the gas to be treated that is forcibly sent in from the inlet (3e) by the blower fan (5) is guided to the guide fins (4), as shown by the arrow (A) in FIG. Like 1. While diagonally crossing the electric lamp (2), it is gently bent inside the reaction chamber (3) and discharged from the outlet (3t).

What is important in the apparatus of the present invention is that a metal oxide layer is provided inside the reaction chamber (3) at least on the surface of the guide fin (4). The surface on which the metal oxide layer is provided is
The guide fin (4) may be on both sides or on one side, but the electric light (2)
) is preferably provided on both sides in order to be easily irradiated with ultraviolet rays and come into contact with the gas to be treated as easily as possible. Further, it is more preferable to provide a metal oxide layer on the upper surface of the bottom plate (3a) and the inner surface of the cover plate (3b), since this improves the deodorizing ability.

As the metal oxide layer, a single or mixed metal oxide layer of titanium oxide or zinc oxide is used.

As the titanium oxide, the anatase type is particularly preferable because it has high activity. Further, titanium oxide may be mixed with an oxide or hydroxide of an alkali metal or alkaline earth metal, or may be in the form of a composite gold I11 oxide such as potassium tetratitanate or potassium hexatitanate. good. Furthermore, an adsorbent such as activated carbon or oxidized clay may be used in combination.

For forming the metal oxide layer on the guide fins (4) etc., any method may be used as long as the metal oxide layer is firmly held; for example, A method of forming by coating is used. However, as shown in FIG. 5, on a support substrate such as a guide fin (4)! It is preferable to provide a fiber layer '7) and attach the fiber layer (to the blade by impregnating or coating the metal oxide (8) to form a metal oxide layer (9). With such a structure, The metal oxide (8) is added to the fiber structure of the fiber layer (7),
Because it is physically trapped in the fiber structure rather than chemically attached, it becomes structurally strong, and the metal oxide (8) trapped between the fibers has a wide surface area that can be exposed to ultraviolet rays. This is because the deodorizing efficiency is thereby increased. In addition, metal oxides are reliably retained, and the life of the deodorizing device can be extended.

The supporting substrate (4) may be made of any material as long as it can firmly bond the fiber layer (7), such as metals such as aluminum or stainless steel, or synthetic resins that do not deteriorate due to ultraviolet rays. The fiber layer (7)
The material may be any material as long as it can physically capture the metal oxide (8); for example, natural fibers such as cotton or wool, or synthetic fibers such as nylon or polyester are used. .

The method for forming the fiber layer (7) on the support substrate (4) is appropriately selected depending on the combination of the material of the support substrate (3) and the material of the fiber layer (71). For 4), a method of electrostatically flocking fibers such as cotton or wool is preferable.Also, as shown in FIG. Suitably adopted.

The thickness and density of the fiber layer (7) vary depending on the type and amount of metal oxide to be attached, but the thickness is usually 0.05 mm.
~2II1m, preferably 0.05-1mIII, density 30-1000(]/end, preferably 30-6500
．． /Butts are preferably used.

The metal oxide (8) may be attached to the fiber layer (7) by any method as long as the metal oxide is firmly captured in the fiber composition. The solution of the oxide (8) can be applied to the fiber layer (by brush or spray), or the fiber layer can be impregnated by a method such as dipping the fiber layer in a solution of the metal oxide.

Next, a method of using the embodiment described above will be explained. A deodorizing device as shown in FIG. 1 is installed at a suitable location such as a human waste treatment plant, a sewage treatment plant, a nursery farm, or connected to an exhaust pipe of a factory. When the blower fan (5) is driven and the electric light (2) is turned on, the gas to be treated flows through the cover (
6) and sent into the reaction chamber (3). The gas to be treated is guided by guide fins (4) in the reaction chamber (3) and led to the outlet (3e) while gently bending, during which time it is irradiated with ultraviolet rays in the presence of metal oxides, and the gas to be oxidized is An oxidative decomposition reaction of sulfur compounds occurs and deodorization occurs. The treated gas thus treated is discharged from the outlet (1C) of the base (1) to the outside via the cover (6).

If the activity of the metal oxide layer (9) decreases after operating the deodorizing device of this example for a certain period in this way,
By replacing only the reaction chamber (3) containing the metal oxide layer (9) with a new one, the deodorizing device can be operated with high efficiency again. Note that since the reaction chamber (3) is detachable, it goes without saying that its replacement is extremely easy. In addition, in the deodorizing device of this embodiment, the guide fins (4) have several fins arranged in a scattered manner, so the pressure loss during forced air supply is reduced, and a large amount of gas to be treated can be handled with high efficiency. Can be deodorized.

Next, another embodiment will be described. 7 to 10 show other examples of reaction chambers and guide fins suitable for the deodorizing apparatus of the present invention.

The reaction chamber (3) shown in FIG. 7 is of the same type as the reaction chamber (3) shown in FIG. The guide fin (4) consists of a large number of small fins (4f), and each fin (4f) is attached to the bottom plate (3a) parallel to each other and at right angles to the electric light (2). . Although the fins (4f) shown in this figure have a half-collar shape, they may have other shapes, such as polygons such as triangles and quadrangles. In this embodiment, the inlet (3e) and outlet (3f) for introducing and discharging the gas to be treated are covered with a cover plate (
It is preferable that the fins 3b) be provided at both ends of the fins 3b) so that the gas to be treated passes between the fins 4f in a meandering manner. When the gas to be treated is passed in a meandering manner in this way, the time during which the gas to be treated is in contact with the metal oxide layer is increased, and the deodorizing efficiency is improved.

The reaction chamber (3) shown in FIG. 8 employs a semicylindrical hollow container with a slightly higher body than the reaction chamber shown in FIG. 3. In the embodiments shown in FIGS. 1 and 7, the electric light (2) was attached to the base (1), but in this embodiment it is fixed inside the reaction chamber (3). (2a) is an electric light (
The pillars (2a) are provided at both ends of the electric light (2) to support the electric light (2). However, in this example, it is fixed to the outside of the side plate (3C) of the reaction chamber (3).A pin (2b) for energization protrudes from the bottom surface of the pillar (2a). When it is inserted into the pin hole provided on the base (1) side, the electric light (21) is energized. (4g) is a fin that constitutes the guide fin (4), and in this embodiment In the example, there is a light (2) in the center.
A rectangular plate-shaped fin with a hole through which it passes is used. The fins (4g) are arranged in a staggered manner so as to be perpendicular to the lamp (2), and slightly shifted in the width direction.
b) Inlet and outlet provided at both end positions,
These may be provided on the side plates (3C) at both ends of reaction v(3). In any case, the gas to be treated introduced from the inlet (3e) passes between each fin (4g), passes through the reaction chamber (3) in a meandering manner, and is discharged from the outlet (3t).

The reaction chamber (3) shown in FIG. 9 is a cylindrical reaction chamber with a circular or appropriate polygonal cross section, and a helical guide fin (4) is placed inside the reaction chamber. An appropriate gap may or may not be provided between the outer periphery of the fin (4h) and the inner periphery of the reaction chamber (3).The electric light (2) passes through the center of the guide fin (4h). and is supported at both ends by pillars (2a).The pillars (2a) are located within the reaction chamber (3) and are of the same type as shown in Figure 8. Power supply pin (2b)
It is equipped with In this embodiment, an inlet (3e) and an outlet (3f) are provided on the side plates (3C) at both ends of the reaction chamber (3), and the gas to be treated flows along the spiral blades of the guide fins (4h). It will be done.

The reaction chamber (3) shown in FIG. 10 has substantially the same shape as the reaction chamber (3) shown in FIG. 8. The electric lamp (2) is supported inside this reaction chamber (3) by a pedestal (2a) of the same type as the pedestal (2a) shown in FIG. The guide fins (4) are several long plate-like fins (4
1), each fin (41) has an electric light (2)
The shape extends radially from the center. Fin (4
For support in 1), the leg straps (2a) may be used, or bosses that can be inserted into both ends of the electric light (2) may be used. In this embodiment, it is preferable to flow the gas to be treated along the longitudinal direction of the fins (4;), so an inlet (3e) and an outlet (3f) are provided on the side plates (3C) at both ends of the reaction chamber (3). It will be done.

Although various examples of the reaction chamber (3) and the guide fins (4) have been described above, the deodorizing device of the present invention is not limited to these examples, and can be freely attached to and detached from the base (1). Any gas can be used as long as it is capable of introducing a treatment gas, causing an efficient deodorizing reaction, and then discharging it.

Note that in this specification, the term "gas containing an oxidizable sulfur compound and oxygen" refers to a gas containing an oxidizable sulfur compound and oxygen. It refers to a mixed gas containing 1 ppm or more and about 1% or more of oxygen, such as fermentation gas, and foul-smelling air from human waste treatment plants, sewage treatment plants, and livestock farms. In addition, it may further contain ammonia, nitrogen-containing hydrocarbons such as methylamine, dimethylamine, and trimethylamine, unsaturated hydrocarbons, alcohols, aldehydes, and the like.

In addition, the oxidizable sulfur compound in this specification means a sulfur compound that can react with oxygen, such as sulfur-containing hydrocarbons such as methyl mer butane, methyl sulfide, methyl disulfide, and carbon disulfide, and hydrogen sulfide. etc.

Generally, even if an oxygen gas such as air containing sulfur compounds is irradiated with near ultraviolet light having a wavelength of 200 tv or more, almost no oxidative decomposition reaction occurs because these components do not absorb the light. However, surprisingly, when the device of the present invention is used and irradiated with ultraviolet rays in the presence of metal oxides, oxidative decomposition reactions of oxidizable sulfur compounds occur, and bad odors caused by them can be removed.

The irradiation time of ultraviolet rays varies depending on the type of ultraviolet rays, the type and concentration of oxidizable sulfur compounds, the composition of the untreated gas mixture, etc., and can be selected appropriately according to these conditions, but it is usually irradiated for 10 seconds to 30 minutes. Bye. Alternatively, continuous irradiation may be performed.

When adjusting the deodorizing treatment time according to the odor concentration, it is preferable to control the drive time of the blower fan (5) using an appropriate timer. The drive time and stop time set by the timer may be set by manual input means, but an automatic control device using a microcomputer or the like may also be used. In the case of an automatic control device such as the latter, it is preferable to detect the odor concentration using an odor sensor and to perform continuous drive or intermittent drive at appropriate intervals depending on the concentration.

Roughly speaking, in each of the above embodiments, the aromatic agent can be made to leak to the outlet side of the reaction chamber (3). In such cases, fragrance is added to the deodorized clean air, creating a more comfortable environment.

Further, when a general deodorizing agent is provided on the outlet side of the reaction chamber (3), residual odors that could not be removed by the deodorizing device are deodorized by the deodorizing agent, making it possible to breathe cleaner air.

In each of the above examples, the metal oxide layer (9
) is arranged around the electric light, but Nogawa may also form this directly on the outer periphery of the electric light. In this case, the thickness of the metal oxide coating must be such that ultraviolet rays can be transmitted through it.

[Effects of the invention] When the deodorizing device of the present invention is used, it can be used not only for deep ultraviolet rays with a wavelength of 200 nm or less, but also for wavelengths exceeding 200 nm, which have extremely high power efficiency and are highly economical, but cannot oxidize and decompose oxidizable sulfur compounds. Near ultraviolet rays can also be effectively used to remove extremely low concentrations of malodorous oxidizable sulfur compounds.

In addition, the present invention can be used for factory exhaust where the odor of oxidizable sulfur compounds is a problem, and can also deodorize the interior of automobiles, refrigerators, toilets, etc., so the present invention is extremely significant in terms of environmental hygiene. It is something that has.

Furthermore, in the present invention, a metal oxide layer with reduced catalytic activity can be replaced simply by replacing the reaction chamber, making maintenance extremely easy.

In addition, when a reaction chamber with several fins scattered is used, the pressure drop is small when the gas to be treated is forcedly supplied.
In addition, since the contact efficiency with the metal oxide layer increases, a large amount of gas to be treated can be efficiently deodorized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a deodorizing device according to an embodiment of the present invention;
Figure 2 is a cutaway plan view of the main parts of the deodorizing device shown in Figure 1;
Figure 3 is a perspective view of the main parts of the reaction chamber shown in Figure 1, Figure 4 is a perspective view of the reaction chamber with the bottom facing upward, and Figure 5 is the support structure of the metal oxide layer. FIG. 6 is a perspective view showing the fiber layer adhered to the support substrate, and FIGS. 7 to 10 are explanatory views showing other embodiments of the reaction chamber and guide fins, respectively. (Main symbols in the drawing) (1): Base (2J: Electric light (3): Reaction chamber (4): Guide fin (5): Blower fan +7): l Fiber layer (8): Metal oxide (9) :Metal oxide layer Patent applicant: High Energy Utilization Co., Ltd. 1 Figure 1 = Base 2゛Light 6-Reaction chamber 4, Guide fin 5, Blowing fan 7/Fiber layer 5 Figure 8: Metal oxide

Claims (1)

[Scope of Claims] 1. A base, an electric lamp mounted on the base that generates ultraviolet rays, a reaction chamber having a peripheral wall that can surround the electric lamp, and a reactor to be treated introduced into the reaction chamber. a guide fin fixed inside the reaction chamber for guiding gas from the inlet to the outlet of the reaction chamber, and a single or mixed metal oxide layer of titanium oxide or zinc oxide provided on at least the surface of the guide fin; A deodorizing device for gas containing oxidizable sulfur compounds and oxygen, comprising a blower fan attached to the entrance of the reaction chamber, and the reaction chamber is detachably attached to the base. 2. Claim 1, wherein a plurality of the guide fins are arranged in a scattered manner so as to efficiently contact the gas to be treated passing through the reaction chamber and to gently bend the flow of the gas to be treated. Deodorizing device as described in section. 3. The deodorizing device according to claim 2, wherein the reaction chamber is a hollow bottomed semicylindrical container, and the guide fins are provided inside the reaction chamber. 4. The deodorizing device according to claim 1, wherein a single or mixed metal oxide layer of titanium oxide or zinc oxide is provided on the surface of the guide fin and the inner peripheral wall surface of the reaction chamber. 5. The deodorizing device according to claim 1, wherein the metal oxide layer is formed by adhering a metal oxide to a fiber layer provided on a support substrate.