JPH08252562A - Treating device for crude dust - Google Patents

Abstract

PURPOSE: To deodorize malodorous gases by adsorbing these gases on the condensed water condensed on a condensation member and efficiently executing cracking by photocatalysts. CONSTITUTION: This treating device for crude refuse has a crude dust decomposing chamber 2 which houses moisture absorbing members 1, agitating members 3 which agitate the crude dust and these moisture absorbing members 1, a discharge path 7 which discharges the air outside from this crude dust decomposing chamber 2, an agitating section 12 disposed in the discharge path 7 and a UV lamp 13. The condensation member 12 is extended vertically and is adhered with the photocatalysts on its surface. The moisture discharged by the decomposition of the crude refuse is condensed onto the surface of the condensation member 12 and the malodorous gases are adsorbed on the condensed water. The malodorous gases are cracked with the photocatalysts by irradiation with a UV lamp 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for decomposing organic raw dust with bacteria and discarding it.

[0002]

2. Description of the Related Art An enormous amount of dust is generated in households nationwide. The daily amount of dust generated in each household is about 700g.
Is said. 70,000 tons of dust is generated in a city with 100,000 households a day. Raw dust is incinerated and discarded. Since raw dust has a very high moisture content, it requires a large amount of heat energy for incineration. This is because it requires a large amount of energy to vaporize water. Therefore, the actual situation is that a huge amount of money is spent on the treatment of raw dust. The method of decomposing raw dust with bacteria instead of incineration does not have this adverse effect, and the energy consumed for disposal can be extremely reduced.

An apparatus for treating raw dust using bacteria is
If it is designed compactly, it can be installed in each home. If each household has this device, it is possible to decompose raw dust and dispose of it at home. Therefore, it is not necessary to collect raw dust and incinerate the raw dust. Each household does not even have to bring the dust to a specific place on the day of collection. This method
The huge cost of disposing of raw dust can be saved, and since the raw dust generated at home can be immediately treated, it has a very excellent feature that the raw dust can be treated conveniently and hygienically.

Devices for treating raw dust in this way have already been developed. In the conventional device, a moisture absorbing member such as sawdust from cedar is put in a raw dust decomposition chamber of a case that can be closed, and bacteria and raw dust are put therein and stirred. The device of this structure breeds bacteria in sawdust and decomposes raw dust, which is an organic matter, into gas and water. Therefore, the amount of raw dust after treatment is reduced to a level that is not comparable to that before treatment. Therefore, raw dust may be added to the raw dust decomposition chamber every day, and bacteria may be added once every one to several days. The raw dust decomposed by bacteria is
The volume and weight are extremely reduced. For this reason, even if about 1 kg of raw dust is added every day, the weight of sawdust hardly increases. This is because raw dust is decomposed into gas and water, the gas is exhausted together with the air, and the water is vaporized and exhausted together with the air.

The apparatus for decomposing raw dust in this way has the feature that it can be used extremely conveniently. However, in the device for decomposing raw dust with bacteria, the decomposed gas contains a malodorous gas. For this reason, when the gas is discharged to the outside from the biodegradation chamber together with the air, the odor is scattered and cannot be used indoors. If the dust treatment device is installed outdoors, the problem of malodor will be reduced. However, this kind of device, when installed indoors,
It will be very convenient to use. This is because it can be installed in a kitchen where fresh dust is generated. The trouble is that it is important for the kitchen to have the least stench. This is because you cannot eat comfortably in the stinking kitchen.

Various deodorizing devices have been developed in order to deodorize the malodorous gas of the air discharged from the raw dust decomposition chamber. A deodorizing device has been developed in which ozone is added to the exhaust passage. An apparatus for deodorizing with ozone needs to use an ozone-oxygen conversion catalyst that converts ozone into oxygen in order to prevent residual ozone that is not consumed by decomposition of malodorous gas from leaking to the outside.

[0007]

Since ozone is a gas having a strong activity, it is important to design it so that it is not discharged into the room as much as possible. There is no problem if the ozone-oxygen conversion catalyst can completely decompose ozone into oxygen. However, when the ozone-oxygen conversion catalyst is used in a humid environment, the ozone decomposing ability is remarkably lowered. This is because when water contained in the air is condensed, ozone decomposing performance is deteriorated.

Unfortunately, it is extremely difficult for an apparatus for treating raw dust to keep the ozone-oxygen conversion catalyst in an environment where it can actively operate. This is because when raw dust is decomposed into water and gas, the discharged air contains a large amount of water. The air discharged from the raw dust decomposition chamber contains moisture from which the raw dust is decomposed and becomes considerably humid air. When the humid air passes through the ozone-oxygen conversion catalyst, it is condensed to significantly reduce the ozone decomposition performance of the ozone-oxygen conversion catalyst. Since the device for treating raw dust decomposes the raw dust into water and gas and exhausts it by the action of bacteria to eliminate it, it is theoretically impossible to reduce the water content in the air.

When raw dust is added to the moisture absorbing member and stirring is started by the stirring member, decomposition of the raw dust starts in about 4 hours. Then, the exhausted air contains a large amount of water. This is because raw dust is decomposed into water and discharged to the outside. Depending on the amount of added raw dust, if one day's raw dust is put into the raw dust decomposition chamber and stirred, the raw dust will be decomposed by 4 to 12
Continue for hours. During this time, the moisture content of the exhausted air becomes extremely high. The high-humidity air causes dew condensation on the ozone-oxygen conversion catalyst, which significantly deteriorates the performance as a catalyst. In order to reduce the exhaust ozone concentration when the performance of the ozone-oxygen conversion catalyst decreases, it is necessary to reduce the ozone concentration supplied to the exhaust passage. The decrease in ozone concentration in the exhaust passage makes it difficult to effectively deodorize malodorous gas. For this reason, the malodorous gas comes to be discharged to the outside of the machine.

In order to prevent the performance deterioration of the ozone-oxygen conversion catalyst due to dew condensation water, a dehumidifier is arranged in the front step of the ozone-oxygen conversion catalyst, or a heater is installed in the front step of the ozone-oxygen conversion catalyst. Techniques for arranging are developed. However, the device using the dehumidifier has a drawback that the device is expensive. It is difficult for a device that heats air with a heater to effectively prevent dew condensation on the ozone-oxygen conversion catalyst. This is because the relative humidity of the air passing through the heater can be lowered, but when passing through the ozone-oxygen conversion catalyst, the air temperature is lowered and the relative humidity is increased. Therefore, although the structure using the heater has a feature that the device can be simplified, it is not possible to effectively prevent the dew condensation of the ozone-oxygen conversion catalyst. Therefore, the drawback of exhausting ozone and malodorous gas cannot be eliminated in use.

An apparatus using a photocatalyst is disclosed in the following publication as a technique for deodorizing a malodorous gas. Japanese Utility Model Publication No. 4-117643 Japanese Patent Publication No. 2-9850 Japanese Patent Publication No. 1-139139 Japanese Patent Publication No. 3-106420 Japanese Patent Publication No. 3-157125 Japanese Patent Publication No. 6-7907 Japanese Patent Publication No. 4-272337 Japanese Patent Publication Kaihei No. 4-307065

The above publication describes a deodorizing device provided with a photocatalyst for decomposing and removing a malodorous gas in the air, and a light irradiating means for irradiating the photocatalyst with light to deodorize it. Describes a purification method for removing harmful substances in wastes by using a photocatalyst that is activated in response to light energy. The publication describes an apparatus in which an ultraviolet lamp and a porous body carrying a photocatalyst are provided so as to face each other, and air is introduced between them for deodorization and sterilization. In the publication, in the coexistence of a semiconductor-supported reticulated catalyst and a gas containing a malodor, the gas is transmitted through the catalyst, and the semiconductor is irradiated with light to activate the malodor to effectively activate the malodor. A deodorizing method of decomposing is described. The publication describes a photocatalytic deodorizing method of irradiating an aqueous solution in which tungsten oxide is suspended with light of a specific wavelength. The publication describes a deodorizing device for a toilet, which irradiates a photocatalyst for decomposing and removing a bad odor with light to contact the photocatalyst to remove the bad odor. Further, this publication describes a deodorizing mechanism in which a photocatalyst is provided on a wall in a room and the photocatalyst is irradiated with ultraviolet rays to deodorize air in a toilet or the like.

As described in these publications, a device for deodorizing a malodorous gas with a photocatalyst has already been developed. The present invention succeeds in efficiently deodorizing the malodorous gas discharged from the raw dust decomposition chamber by using the photocatalyst in a more ideal environment. Therefore, an important object of the present invention is to provide an apparatus for treating raw dust capable of efficiently deodorizing malodorous gas with a photocatalyst.

[0014]

In order to achieve the above-mentioned object, an apparatus for treating raw dust of the present invention has the following constitution.
The raw dust processing apparatus includes a raw dust decomposing chamber 2 accommodating a moisture absorbing member 1 to which bacteria decomposing the raw dust are added, and raw dust and a moisture absorbing member provided inside the raw dust decomposing chamber 2. 1, an agitation member 3 for agitating 1, the exhaust passage 7 for exhausting air from the raw dust decomposition chamber 2 to the outside, and a dew condensation member 12 provided in the exhaust passage 7 for dew condensation on the surface of moisture of the humid air exhausted. And a photocatalyst attached to the surface of the dew condensation member 12, and an ultraviolet lamp 13 for irradiating the photocatalyst with ultraviolet light. Moisture that is decomposed into raw dust and discharged is condensed on the surface of the condensation member 12. The dew condensation water adhering to the surface of the dew condensation member 12 adsorbs malodorous gas and efficiently captures it. The malodorous component adsorbed on the dew condensation water of the dew condensation member 12 is efficiently irradiated with the ultraviolet rays emitted from the ultraviolet lamp 13 and decomposed by the photocatalyst.

Further, in the raw dust processing apparatus according to the second aspect of the present invention, the ozone supply means 5 is connected to the exhaust passage 7. The exhaust passage 7 is provided with an ozone-oxygen conversion catalyst 6 for decomposing ozone into oxygen on the exhaust side. Further, the ozone-oxygen conversion catalyst 6 is disposed on the discharge side of the dew condensation member 12, and the air from which moisture in the air is removed by the dew condensation member 12 is passed through the ozone-oxygen conversion catalyst 6.

[0016]

The apparatus for treating raw dust of the present invention performs the following operations to decompose raw dust. Bacteria are made to live in the moisture absorbent member 1 such as sawdust that is filled in the raw dust decomposition chamber 2. Bacteria decompose the supplied raw dust into gas and water. The water and gas decomposed from the raw dust pass through the exhaust passage 7 and are discharged from the raw dust decomposition chamber 2 to the outside. Raw dust is intermittently supplied to the raw dust decomposition chamber 2. In most cases, the raw dust generated in the kitchen is supplied at a rate of 1 to 3 times a day. This is because raw dust is generated during meals. However, when you are away from home when traveling, raw dust may not be supplied for several days. When the raw dust is supplied, the bacteria gradually become active, and after about 4 hours, the raw dust is actively decomposed. When bacteria are actively decomposing raw dust, the amount of water and malodorous gas also increases. As the decomposition of raw dust by bacteria approaches, the amount of water and malodorous gas will decrease. That is, when a large amount of malodorous gas is generated,
A large amount of water is also generated.

As described above, the apparatus for decomposing raw dust with bacteria generates a large amount of malodorous gas and water when decomposing raw dust. In other words, when a large amount of malodorous gas is discharged, the relative humidity of the exhausted air also becomes high.
The air that is supersaturated or close to that state is in contact with the surface of the dew condensation member to cause water vapor contained therein to be condensed on the surface. The apparatus of the present invention utilizes this state very effectively to effectively deodorize the malodorous gas discharged from the raw dust decomposition chamber.

In the conventional deodorizing device using a photocatalyst, a malodorous gas is directly contacted with a photocatalyst that irradiates ultraviolet rays to deodorize the malodorous gas. In order to deodorize a large amount of malodorous gas in this manner, it is necessary to lengthen the exhaust passage provided with the photocatalyst. This is because the malodorous gas passes through the short exhaust passage. The apparatus for treating raw dust of the present invention does not directly contact a photocatalyst with a malodorous gas to deodorize it.
The malodorous gas is adsorbed and captured by the dew condensation water of the dew condensation member coated with the photocatalyst, and is deodorized by the photocatalyst in the state of being adsorbed by the dew condensation water. The malodorous gas component deodorized in this state is efficiently deodorized by contacting the photocatalyst for a long time. That is, the apparatus for treating raw dust of the present invention captures malodorous gas in dew condensation water, thereby significantly extending the contact time with the photocatalyst and efficiently deodorizing.

Further, the apparatus for treating raw dust of the present invention utilizes the moisture generated by decomposing raw dust as the moisture for adsorbing the malodorous gas. Therefore, it is not necessary to replenish the moisture for capturing the malodorous gas, and the malodorous gas is captured by the dew condensation water and efficiently deodorized by the photocatalyst. More advantageously, since the device of the present invention utilizes the water obtained by decomposing raw dust for capturing malodorous gas, when a large amount of malodorous gas is generated, a sufficient amount of dew condensation water is formed on the dew condensation member. Will be replenished. Therefore, when a large amount of malodorous gas is generated, the malodorous gas is efficiently adsorbed by the moisture condensed on the surface of the dew condensation member, and the deodorization is surely performed by the photocatalyst.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify the raw dust processing apparatus for embodying the technical idea of the present invention, and the present invention does not specify the configuration of the raw dust processing apparatus to the following. .

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

The apparatus for treating raw dust shown in FIG. 1 is provided with a raw dust decomposing chamber 2 filled with a moisture absorbing member 1 for adding bacteria for decomposing the raw dust, and an opening portion of the raw dust decomposing chamber 2 which is openably and closably provided. The opening / closing lid 9, the stirring member 3 for stirring the raw dust supplied to the raw dust decomposing chamber 2 and the moisture absorbing member 1, the exhaust passage 7 for exhausting air from the raw dust decomposing chamber 2 to the outside, and this exhaust A dew condensation member 12 provided on the passage for dew condensation on the surface of the humid air exhausted, a photocatalyst attached to the surface of the dew condensation member 12, and an ultraviolet lamp 13 for irradiating the photocatalyst with ultraviolet rays are provided.

The raw dust decomposition chamber 2 is provided inside a box-shaped case 8 having an opening at the top. The raw dust decomposition chamber 2 is provided with an opening / closing lid 9 in the upper opening for introducing raw dust. The opening / closing lid 9 is connected so as to be opened and closed via a hinge. When the opening / closing lid 9 is opened and fresh dust is put in, and the opening / closing lid 9 is closed, the odor of the raw dust decomposition chamber 2 does not leak.

The fresh dust decomposition chamber 2 is filled with sawdust as a moisture absorbing member 1. The sawdust has ideal physical properties as the moisture absorbent member 1. This is because it is a large amount of waste, is inexpensive, and has suitable hygroscopicity. Cedar sawdust is most suitable for sawdust. However, instead of sawdust, the hygroscopic member 1 may be made of any hygroscopic powder or granule that can inhabit bacteria.

Although only aerobic bacteria can be used as the bacteria added to the moisture absorbent member 1, facultative anaerobic bacteria are preferably added in addition to the aerobic bacteria. More preferably, enzymes are added in addition to bacteria. Examples of aerobic bacteria, facultative anaerobic bacteria and enzymes added to the moisture absorbent member 1 include ABC Japan Co., Ltd. (3-1, Kuramae, Taito-ku, Tokyo).
"Unizyme" which is a microorganism of 3-13) is used.
Unizyme is a bacterial powder in which aerobic bacteria, facultative anaerobes and enzymes are added to a hygroscopic powder.
Unizyme, which is a bacterial powder, can be used in a device that decomposes 2 kg of raw dust every day and can be added in a small amount of 5 g every 2 days.

The stirring member 3 is a spiral coil stirring blade 3A and a reduction motor 3 for rotating the stirring blade 3A.
B and. When the stirring blade 3A is rotated, the moisture absorbent member 1 is raised and stirred as indicated by the arrow. Since the stirring blade 3A is disposed in the central portion of the raw dust decomposing chamber 2, the moisture absorbent member 1 is raised in the central portion of the raw dust decomposing chamber 2 and is circulated and agitated so as to fall around it.

The raw dust decomposition chamber 2 has an exhaust passage 7 connected to the upper opening. The exhaust path 7 exhausts air from the raw dust decomposition chamber 2. Along with the air, the moisture and gas from which raw dust is decomposed are discharged out of the machine. The gas discharged together with air contains a malodorous gas. A dew condensation member 12 is arranged vertically in the exhaust passage in order to deodorize the malodorous gas in the exhaust passage. A metal plate is used for the dew condensation member 12 in order to efficiently attach dew condensation water to the surface. Since the metal plate is excellent in heat conduction, when the decomposition of raw dust is started by bacteria and the air temperature rises, the surface temperature of the dew condensation member 12 is kept low and the dew condensation water is efficiently attached. In order to attach the dew condensation water to the dew condensation member 12 efficiently, the dew condensation member 12 is fixed to one side surface of the exhaust passage 7 so that the dew condensation member 12 can be efficiently cooled by the outside air. Even if the dew condensation member 12 that is a metal plate is disposed inside the exhaust passage, dew condensation water can be attached to the surface when the decomposition of raw dust starts and the air temperature and humidity rise. As shown in the figure, since the dew condensation member 12 arranged vertically can naturally flow down the water that has condensed and adhered to the surface, the dewed water can flow down first and new dew condensation water can be successively attached. There are features. The apparatus for treating raw dust shown in the figure has a dew condensation member 1
Although 2 is arranged vertically, the dew condensation member may be arranged in an inclined posture to allow the dew condensation water to flow down.

The dew condensation member 12 has a photocatalyst attached on its surface. As the photocatalyst, any one capable of deodorizing the malodorous gas generated by decomposing raw dust can be used, but fine powder of titanium oxide is preferably used. Titanium oxide fine powder is several μm
It is applied to the surface of the dew condensation member by using a transparent binder in the form of fine powder or a fine powder having a particle size smaller than that.

A dew condensation member 12 is provided on one surface of the exhaust passage 7, and a reflection layer 17 is provided on the surface opposite to the dew condensation member 12. The exhaust passage 7 having the reflection layer 17 has a feature that it can reflect the ultraviolet light emitted from the ultraviolet lamp 13 and efficiently irradiate the photocatalyst. For the reflective layer 17, for example, a metal such as aluminum foil or a mirror can be used.

An ultraviolet lamp 13 is arranged here between the reflective layer 17 and the dew condensation member 12 as an air passage.
As the UV lamp, any lamp that emits UV light can be used. The advantage of using an electrodeless fluorescent lamp for the UV lamp is that it has a long life. However, as the ultraviolet lamp, a health lamp, a germicidal lamp or the like which is commercially available as a fluorescent lamp for irradiating ultraviolet rays can be used.

The apparatus for treating raw dust of the present invention efficiently uses a photocatalyst to deodorize a malodorous gas, but the apparatus of the present invention more completely deodorizes a malodorous gas with both a photocatalyst and ozone. You can also FIG. 2 shows an apparatus for deodorizing a malodorous gas with a photocatalyst and ozone. This device supplies ozone to the exhaust passage 7 to deodorize a foul-smelling gas, further deodorizes it with a photocatalyst, and then passes through the ozone-oxygen conversion catalyst 6 to exhaust it to the outside of the machine.

In the apparatus shown in FIG. 2, the drain pipe 14 is connected to the bottom of the exhaust passage in which the dew condensation member is arranged. Drainage pipe 1
4 is reverse U so that water is discharged and air is not discharged.
It is bent in a letter shape to form a trap. The trap blocks the water that collects here and prevents the discharge of air. The device that connects the drain pipe 14 to the bottom of the exhaust passage 7 has a feature that the condensed water can flow out to the outside of the exhaust passage 7, so that the moisture of the air passing therethrough can be efficiently removed.

However, in the device shown in FIG. 2, it is not always necessary to connect the drain pipe 14 to the bottom of the exhaust passage 7. In the exhaust passage 7 without the drain pipe 14, condensed water that adheres to the surface of the dew condensation member and flows down is collected at the bottom. The water accumulated here is vaporized into the air again and discharged when the relative humidity of the air becomes low. When the relative humidity of the air is high, the amount of water that accumulates at the bottom is vaporized to the air and is not immediately vaporized. Therefore, when the relative humidity of the air is high, the water that has condensed on the dew condensation member separates and accumulates at the bottom of the exhaust passage 7, and when the relative humidity of the air decreases, the water that accumulates at the bottom of the exhaust passage 7 vaporizes again, Is discharged together with. Exhaust passage 7 when the relative humidity of the air is low
Even if the water that collects at the bottom of the water vaporizes, the relative humidity of the air is low, so the humidity does not become abnormally high.

The exhaust path 7 is provided with an exhaust fan 4 at the exhaust end. The exhaust fan 4 forcibly exhausts the air in the raw dust decomposition chamber 2. When the air in the raw dust decomposition chamber 2 is forcibly exhausted by the exhaust fan 4, new air is sucked into the raw dust decomposition chamber 2 through the gap between the opening / closing lid 9 and the case 8. However, although not shown, the case 8 may be provided with an opening for sucking outside air.

In the apparatus for treating raw dust shown in FIG. 2, the ozone supply means 5 is connected to the inflow side of the exhaust passage 7. The ozone supply means 5 sucks the outside air from the outside air suction passage 15, adds ozone to the sucked air, and supplies the ozone to the exhaust passage 7. The ozone supply means 5, for example, applies a high voltage to the opposing electrodes,
It is used that discharges between the electrodes and allows air to pass therethrough, thereby converting a part of oxygen contained in the air into ozone. The ozone supply means 5 shown in FIG.
Is provided. The fan 16 sucks outside air into the outside air intake passage 15 and supplies the outside air to the exhaust passage 7.

In order to prevent ozone leakage from the outside air suction passage 15, the ozone discharge prevention means 10 is connected to the outside air suction passage 15 for sucking outside air. Ozone emission prevention means 1
0 is an ozone-oxygen conversion catalyst 11 that prevents ozone leakage when the fan 16 fails, and converts ozone passing therethrough into oxygen. The ozone-oxygen conversion catalyst 11 is
It has a void for passing air to which ozone is added. The voids may be provided, for example, in the form of a honeycomb with the ozone-oxygen conversion catalyst 11. Ozone-oxygen conversion catalyst 1
Ozone contained in the air passing through the void 1 is converted into oxygen and discharged. The ozone-oxygen conversion catalyst 11 is any catalyst capable of converting ozone into oxygen, for example, "Ozone decomposition / deodorization catalyst (TSO)" released by Nippon Shokubai Co., Ltd. (4-1-1 Koraibashi, Chuo-ku, Osaka City). Can be used.

The ozone supply means 5 supplies the exhaust passage 7 with air containing ozone of about 1 to 3 ppm. The ozone concentration supplied by the ozone supply means 5 to the exhaust passage is 0.3 to 10 pp.
It can be set in the range of m. When the ozone concentration becomes high, the ozone-oxygen conversion catalyst 6 arranged on the exhaust side of the exhaust passage 7 cannot completely convert it to oxygen. If the ozone concentration is too low, the odor cannot be deodorized. The ozone concentration is set in the above range in consideration that the bad odor can be made odorless and the ozone can be completely removed by the ozone-oxygen conversion catalyst 6.

The ozone-oxygen conversion catalyst 6 provided on the exhaust side of the exhaust passage 7 converts the ozone that remains without being consumed for the decomposition of the malodorous gas into oxygen. As the ozone-oxygen conversion catalyst 6 arranged here, the same one as the ozone-oxygen conversion catalyst 11 arranged in the outside air intake passage 15 can be used. This ozone-oxygen conversion catalyst 6 also has a honeycomb shape for allowing air to pass through. The ozone-oxygen conversion catalyst 6 decomposes residual ozone contained in the air passing therethrough into oxygen. When the "ozone decomposition / deodorization catalyst (TSO)" sold by Nippon Shokubai Co., Ltd. (4-1-1 Koraibashi, Chuo-ku, Osaka City) is used as the ozone-oxygen conversion catalyst 6, the ozone concentration is lowered and Also, it has the feature that it promotes the reaction between malodorous gas and ozone and that it can absorb malodorous gas.

When the ozone-oxygen conversion catalyst is condensed, the performance of decomposing ozone is remarkably deteriorated. For this reason, the ability of decomposing ozone decreases due to the water generated when the raw dust is decomposed. However, since the apparatus for treating raw dust of the present invention shown in FIG. 2 has a dew condensation member provided in the exhaust passage to dew moisture to remove it, high-humidity air can pass through the ozone-oxygen conversion catalyst. First, this ozone-oxygen conversion catalyst has a feature that ozone can be efficiently decomposed into oxygen and discharged.

[0040]

According to the apparatus for treating raw dust of the present invention, a dew condensation member is provided in the exhaust passage for exhausting the air in the raw dust decomposition chamber, and a photocatalyst is attached to the dew condensation member to irradiate ultraviolet rays.
The photocatalyst does not directly deodorize the malodorous gas. Since the photocatalyst is attached to the dew condensation member, the malodorous gas component adsorbed on the dew condensation water on the surface is efficiently deodorized. The malodorous gas that is deodorized in this state does not pass through the surface of the photocatalyst unlike the conventional deodorizing device that uses the photocatalyst. The malodorous gas is adsorbed on the dew condensation water and is contacted with the photocatalyst for a long time to be efficiently deodorized.

As described above, the apparatus for treating raw dust of the present invention efficiently deodorizes malodorous gas with a photocatalyst through water. That is, water is required to efficiently deodorize the malodorous gas with the photocatalyst. The apparatus of the present invention efficiently deodorizes with a photocatalyst by utilizing the moisture generated by decomposing raw dust. Decomposing raw dust with bacteria produces water. Water is discharged together with air. The moisture discharged together with the air is attached to the surface of the dew condensation member as dew condensation water. In particular, when raw dust is supplied to the raw dust decomposition chamber and bacteria are violently decomposed, a large amount of water is exhausted and the humidity of the exhaust air becomes high. High-humidity air is condensed on the surface of the dew condensation member. Condensation on the surface of the dew condensation member means that when raw dust is decomposed, the amount of water contained in the air increases, and further, when the bacteria decompose the raw dust, the air temperature rises, which causes This is because it is cooled in the exhaust passage and becomes supersaturated. Therefore, when the bacteria decompose the raw dust, the dew condensation water is efficiently attached to the surface of the dew condensation member. In this state, a large amount of malodorous gas is also generated. Therefore, the apparatus for treating dust of the present invention, when a large amount of malodorous gas is generated, efficiently attaches dew condensation water to the surface of the dew condensation member, and with this water, captures the malodorous gas and uses the photocatalyst. It has the feature that it can efficiently deodorize, that is, it can deodorize malodorous gas in a truly ideal state.

Further, in the apparatus for treating raw dust according to the second aspect of the present invention, the ozone supply means, the dew condensation member, and the ozone-oxygen conversion catalyst are arranged in the exhaust passage for exhausting air.
The device of this structure has a feature that it can more effectively deodorize malodorous gas with both ozone and photocatalyst. Furthermore, since the ozone-oxygen conversion catalyst is arranged on the discharge side of the dew condensation member,
When the exhaust air has high humidity, the moisture contained in the air is removed by the dew condensation member and passes through the ozone-oxygen conversion catalyst. As described above, the ozone-oxygen conversion catalyst remarkably lowers the action of decomposing ozone into oxygen when air having excessive humidity passes through to cause dew condensation. In the apparatus of the present invention, the dew condensation member provided for effective deodorization by the photocatalyst passes the air from which moisture in the air is removed to the ozone-oxygen conversion catalyst.
Therefore, the ozone-oxygen conversion catalyst can be reduced in performance deterioration due to moisture in the air. In particular, the dew condensation member provided to efficiently deodorize the photocatalyst is used together with the member that prevents the performance of the ozone-oxygen conversion catalyst from deteriorating, so the deodorization can be done efficiently with a simple structure, and ozone is discharged indoors. A feature that can effectively prevent monkeys is also realized.

[Brief description of drawings]

FIG. 1 is a sectional view of an apparatus for treating raw dust according to an embodiment of the present invention.

FIG. 2 is a sectional view of an apparatus for treating raw dust according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hygroscopic member 2 ... Raw dust decomposition chamber 3 ... Stirring member 3A ... Stirring blade 3
B ... Deceleration motor 4 ... Exhaust fan 5 ... Ozone supply means 6 ... Ozone-oxygen conversion catalyst 7 ... Exhaust passage 8 ... Case 9 ... Open / close lid 10 ... Ozone discharge prevention means 11 ... Ozone-oxygen conversion catalyst 12 ... Dew condensation member 13 ... UV lamp 14 ... Drainage pipe 15 ... Outdoor air intake 16 ... Fan 17 ... Reflective layer

Claims (2)

[Claims] 1. A raw dust decomposition chamber (2) accommodating a hygroscopic member (1) to which bacteria for decomposing raw dust are added, and a raw dust provided inside the raw dust decomposition chamber (2). A stirring member (3) that stirs the dust and the moisture absorbing member (1), an exhaust passage (7) that exhausts air from the raw dust decomposition chamber (2) to the outside, and an exhaust passage that is provided in this exhaust passage (7). A dew condensation member (12) for dew condensation on the surface of the humidified air, a photocatalyst attached to the surface of the dew condensation member (12), and an ultraviolet lamp (13) for irradiating the photocatalyst with ultraviolet rays are provided. Dust is decomposed and the discharged water is condensed on the surface of the dew condensation member (12), and the odorous gas is adsorbed by this dew condensation water and decomposed by the photocatalyst. Processing equipment. 2. The ozone supply means (5) is connected to the exhaust path (7), and the ozone-oxygen conversion catalyst (6) is discharged from the dew condensation member (12) on the discharge side of the exhaust path (7). The raw dust treatment device according to claim 1, wherein the air disposed on the side of the dew condensation member (12) is configured so that the air passes through the ozone-oxygen conversion catalyst (6).