JP2001062287A - Hazardous material treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hazardous material treating device which can efficiently remove hazardous materials by utilizing relation between discharge and various kinds of catalysts. SOLUTION: This hazardous material treating device is provided with a cabinet 2 which takes-in a fluid 3A containing the hazardous materials and exhausts a fluid 3B from which the hazardous materials are removed, a discharge section (a high voltage terminal 4) which is provided in the cabinet 2 and decomposes and removes the hazardous materials contained in the fluid taken in the cabinet 2, a catalyst section (an optical catalyst section 5) which is provided in the cabinet 2, is activated by discharge at the discharge section 4 and decomposes and removes or adsorbs and removes the hazardous materials contained in the fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating harmful substances that utilizes discharge and efficiently removes harmful substances in relation to the discharge and various catalysts.

[0002]

2. Description of the Related Art In recent years, there has been a strong concern that the environment has been polluted by harmful substances such as dioxins and NOx contained in the atmosphere, and harmful substances in wastewater. Research and development of methods to remove the active substances are actively conducted.

Conventionally, examples of the above-mentioned method of removing harmful substances include a method using a discharge treatment apparatus using discharge,
A device using a photocatalytic reaction device using a photocatalyst is known.

FIG. 32 is an explanatory view showing a method of removing harmful substances contained in exhaust gas by discharging.

According to this method, a pulse corona discharge is generated in exhaust gas taken into a housing, and high-energy electrons generated by the pulse corona discharge collide with exhaust gas molecules to generate active chemical species. Chemical species act on harmful substances in the exhaust gas to remove harmful substances by a chemical reaction.

[0006] Conventionally, a photocatalyst which is activated by irradiation with short-wavelength light is applied, and a chemical reaction is caused by a photocatalytic reaction to an inorganic or organic substance which comes into contact with, adheres to or comes close to the photocatalyst. For example, cleaning to remove dirt components from the surface of the substance, antifouling to prevent adhesion of dirt components, sterilization, deodorization, air purification, purification of combustion exhaust gas, exhaust treatment, water purification, wastewater treatment, organic synthesis or organic Acceleration of decomposition reactions, decomposition of inorganic and organic environmental pollutants, and generation of hydrogen and oxygen due to decomposition of water have been widely studied. These fields of application make use of the photocatalytic reaction and photocatalytic action caused by the strong oxidizing and reducing powers of the photocatalyst generated upon photoexcitation.

[0007]

However, in a conventional discharge treatment apparatus for removing harmful substances by discharge or a photocatalytic reaction apparatus for removing harmful substances by a photocatalyst,
There were the following problems.

[0008] In a discharge treatment apparatus utilizing discharge, as described above, active chemical species such as radicals generated by the discharge generate nitrogen oxides (NOx) or sulfur oxides (Sx) in the fluid.
Ox) or dioxins, which act on volatile organic substances to remove these harmful substances by a chemical reaction, but there are harmful substances that cannot be removed by discharge alone, and substances such as ozone generated by discharge. However, there is a problem that these substances are discharged as they are.

On the other hand, for activation (excitation) of a conventional photocatalyst, natural light or artificial light such as a lamp-type light source is mainly used. When natural light is used as a light source, there is a great advantage that energy consumption during use is substantially zero.However, natural light has a low energy density, so the installation area of a photocatalyst is large, or extremely low-concentration substances or long-term reactions. There is a restriction that it can be applied only to a limited target such as taking time.

When artificial light is used as a light source,
Reduction of the energy supplied to the light source is important in promoting the practical use of the photocatalytic reactor.

That is, of the energy consumed by the light source, only the light beam converted to a wavelength that can excite the photocatalyst is used for the chemical reaction, and the other light is converted to heat and emitted. This leads to a decrease in power efficiency and causes an increase in power consumption.

Therefore, in the case of a photocatalytic reactor using artificial light, the efficiency of use of the energy consumed by the light source can be improved.
This has been one of the major issues in promoting the practical use of photocatalytic reactors.

The present invention has been made in view of the above circumstances, and has as its object to provide a harmful substance processing apparatus capable of efficiently removing harmful substances by utilizing the relationship between discharge and various catalysts. .

[0014]

In order to achieve the above object, according to the present invention, there is provided a housing in which a fluid containing a harmful substance flows in and a fluid in which the harmful substance is treated is discharged. A discharge unit that performs discharge treatment on the fluid in the housing, and a catalyst unit that changes harmful substances contained in the fluid into non-harmful substances or removes harmful substances contained in the fluid. Features.

According to a second aspect of the present invention, in the harmful substance processing apparatus according to the first aspect, the catalyst section has a photocatalyst section having a photocatalyst activated by light generated by the discharge of the discharge section, and the discharge section of the discharge section. It is characterized by being constituted by either a catalyst part functioning as a reaction field of the active chemical species generated by the above or an adsorption catalyst part having an adsorption action, or by combining these catalyst parts.

According to a third aspect of the present invention, in the harmful substance processing apparatus according to the first or second aspect, the photocatalyst section constituting the catalyst section is provided upstream and / or downstream of the discharge section.

According to a fourth aspect of the present invention, in the harmful substance processing apparatus according to the second or third aspect, the photocatalyst part constituting the catalyst part is arranged so as to surround a part or the whole of the discharge part. And

According to a fifth aspect of the present invention, in the harmful substance processing apparatus according to any one of the first to fourth aspects, the catalyst functions as a reaction field for active chemical species generated by the discharge of the discharge part constituting the catalyst part. The unit is disposed downstream of the discharge unit or downstream of a photocatalyst unit disposed downstream of the discharge unit.

According to a sixth aspect of the present invention, in the harmful substance treatment apparatus according to any one of the first to fifth aspects, the adsorption catalyst section constituting the catalyst section is provided upstream and / or downstream of the discharge section, In the case where the photocatalyst unit is arranged upstream of the discharge unit, the photocatalyst unit is arranged upstream of the photocatalyst unit, and when the photocatalyst unit is arranged downstream of the discharge unit, When the unit is arranged, it is arranged downstream of the photocatalyst unit.

According to a seventh aspect of the present invention, the harmful substance processing apparatus according to any one of the first to sixth aspects includes an incinerator exhaust gas processing system for processing dioxins or NOx, a deodorizing system for processing odor components, or a volatile organic compound. It is characterized by being used in a factory process gas treatment system for treating substances or NOx.

<Function> When a fluid is irradiated with high-speed electrons by a discharge technique such as pulse discharge or creeping discharge, some of the molecules contained in the fluid are converted into chemically active chemicals such as radicals (free radicals) and molecular ions. A species is produced, and the active species reacts with and removes the harmful substance. Many of the generated active species are very short-lived species that disappear within a few milliseconds, but depending on the temperature, fluid composition, etc., relatively long-lived species with a lifetime of several seconds or more, such as ozone, may be used. Active species may result.

Further, when a discharge is performed in a fluid, light emission phenomena such as excitation light by excited molecules and chemiluminescence by generated active chemical species occur.

In the present invention, a relatively long-lived active chemical species or luminescence phenomenon generated by the discharge is utilized for the treatment of the harmful substance by the catalyst, and the treatment efficiency of the harmful substance is improved.

That is, when atoms or molecules are irradiated with high-speed electrons, the molecules are decomposed by the collision of the high-speed electrons, ionized by the attachment of electrons, and the like, and chemically active species are generated. The generated active chemical species is unstable and causes a chemical reaction with the harmful substance contained in the fluid to remove the harmful substance, but at this time, all the generated active chemical species do not necessarily react with the harmful substance. is not. Some active species react with molecules in the fluid and other active species to transform into metastable active species or molecules that have a longer lifetime than the original active species. In addition, the energy of the high-speed electrons generated by the discharge is not used only for generating active chemical species, but is used for generating excitation light by partially exciting atoms or molecules in a fluid. The metastable active species, the active species used to generate the excitation light, and the energy used to excite molecules and atoms do not contribute to the removal of harmful substances. Therefore, if the metastable active chemical species or excitation light generated by the discharge is used for the treatment of the harmful substance by the catalyst, the treatment efficiency of the harmful substance is improved. In addition, some of the generated active chemical species or chemical species generated from the active chemical species cause chemiluminescence when a chemical reaction occurs. If the chemiluminescence generated at this time is used for treating harmful substances by using a catalyst, the energy use efficiency can be further improved.

As an example, when a discharge is performed in an atmosphere containing a hydrocarbon-based harmful substance such as acetaldehyde or methanol, active chemical species are generated and cause a chemical reaction with the harmful substance to remove the harmful substance. At this time, a part of the generated active species is also used for generating metastable ozone. Ozone is a very oxidizing chemical that can oxidize and decompose harmful substances, but the reaction time is usually very long, and most ozone is emitted without being used for harmful substance processing . Therefore, by arranging a catalyst that acts as a reaction field between ozone and harmful substances, unused ozone can be used for harmful substance treatment. In the discharge in the atmosphere, excitation light is generated by excitation of gas molecules. This excitation light is not usually used for harmful substance treatment, but by arranging a catalyst activated by light around the discharge part, the unused excitation light can be used as a light source to activate the catalyst. It can be used to process hazardous substances. As a result, ozone and excitation light that have not been used until now can be used for the treatment of harmful substances by the catalyst, and the treatment efficiency of harmful substances is improved.

Further, it is possible to remove substances that cannot be treated by the harmful substance treatment alone by the discharge of the discharge part.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <Principle of the Invention> Prior to the description of the embodiment, how each catalyst constituting the present invention decomposes and removes or removes harmful substances will be described.

<< Catalyst Part Excited by Light (Photocatalyst Part) >> As shown in FIG. 29, when discharge is performed in a fluid containing harmful substances, an active chemical species (radical , Molecular ions, etc.), and harmful substances contained in the fluid are processed by the chemical reaction of the active chemical species. On the other hand, the light generated from the discharge part excites the catalyst (photocatalyst) part and causes a chemical reaction on the harmful substance on the surface of the catalyst part to remove the harmful substance. Thereby, the treatment efficiency of removing harmful substances is further promoted in combination with the treatment by the discharge action.

<< Catalyst Functioning as Reaction Field for Active Chemical Species (Ozone Catalyst etc.) >> As shown in FIG. 30, when a discharge is carried out in a fluid containing harmful substances, it becomes chemically reactive. As described above, abundant active species are generated, and harmful substances are treated by a chemical reaction by the active species.

On the other hand, of the active chemical species generated in the discharge part,
For example, a relatively long-lived active chemical species such as ozone reacts with a harmful substance on the surface of the catalyst unit, and can reliably treat a harmful substance that could not be treated in the discharge unit, thereby promoting treatment efficiency.

<< Catalyst Part Having Adsorption Function (Adsorption Catalyst Part) >>
As shown in FIG. 31, when a discharge is performed in a fluid containing a harmful substance, a chemically reactive active chemical species is generated, and the harmful substance is treated by the chemical reaction by the active chemical species. This is as described above.

On the other hand, the catalyst part (adsorption catalyst) having an adsorbing action adsorbs harmful substances, thereby reducing the load of harmful substance treatment on the discharge part and promoting the harmful substance treatment efficiency. Even when the catalytic power of the harmful substance is low, it is possible to increase the adsorptive power by changing to another chemical species by a chemical change occurring in the discharge unit.

The present invention provides a discharge unit, a catalyst unit activated by light, a catalyst unit functioning as a reaction field for active chemical species,
In addition, an optimum catalytic environment is created by combining each of the catalyst units having a catalytic action with an adsorbing action so that harmful substances contained in the fluid are efficiently treated.

<Explanation of the Embodiment> Next, an embodiment of the present invention will be described focusing on a combination structure of a discharge section and each catalyst section.

<< Example of Pulse Corona Discharge + Photocatalyst Unit >> FIG.
The harmful substance processing apparatus 1 shown in Fig. 1 introduces a fluid 3A containing a harmful substance (it is a reactant itself or contains a reactant) from an inlet 2A and removes the harmful substance from the fluid 3A. Case 2 for discharging 3B from outlet 2B
And a rod-shaped high-voltage terminal 4 disposed substantially at right angles to the flow direction of the fluid 3A at a substantially central portion of the housing 2 and functioning as a discharge unit; and a photocatalyst unit disposed downstream of the high-voltage terminal 4 5, a high-voltage terminal 4 by applying a pulse voltage to the high-voltage terminal 4 via a wiring 6, and a power supply 7 for generating a pulse corona discharge between the housings 2.

In this case, the housing 2 is formed of a conductive member in a cylindrical shape, and the outer surface is grounded. When high-speed electrons 8 are generated between the high-voltage terminal 4 and the high-voltage terminal 4 by this corona discharge, active chemical species (radicals, molecular ions, etc.) that are chemically highly reactive due to the discharge action.
Is generated, and harmful substances contained in the fluid 3A are removed by the chemical reaction of the active chemical species.

The photocatalyst unit 5 is composed of a photocatalyst carrier and a photocatalyst mainly composed of titanium oxide, zinc oxide or cadmium sulfide carried on the photocatalyst carrier. As the photocatalyst carrier, the one shown in FIG. 1 is a flat mesh-like one through which the fluid 3A flows well, and the photocatalyst is carried around the mesh. The photocatalyst carrier is not limited to a plate-like mesh, but may be any structure that is arranged around the high-speed electrons 8 and that allows the fluid 3A to pass therethrough. It may have a sponge-like, linear, or packed layer structure. In addition, depending on the reaction substance, at least one kind selected from platinum, gold, and alloys of these metals and their transition elements together with the above-mentioned photocatalyst such as titanium oxide, zinc oxide or cadmium sulfide for promoting the photocatalytic reaction. May be supported.

In the above configuration, the power supply 7 connects the wiring 6
When a high voltage pulse is applied to the high voltage terminal 4 via
Pulse corona discharge occurs between the high-voltage terminal 4 and the housing 2 to generate high-speed electrons 8. The high-speed electrons 8 cause collision or adhesion between the molecules contained in the fluid 3A and the irradiated electrons, and at this time, active chemical species such as radicals and molecular ions are generated. These active chemical species cause a chemical reaction with the harmful substances contained in the fluid 3A to remove harmful substances from the fluid.

Further, molecules and atoms contained in the fluid 3A are excited by high-speed electrons generated by corona discharge, and excitation light is generated. Then, the photocatalyst unit 5 is activated by the excitation light, and causes a chemical reaction with a harmful substance contained in the fluid to remove the harmful substance. In addition, depending on the substance contained in the fluid 3A, a chemical reaction involving light emission may occur. If the chemiluminescence at this time has a wavelength that can excite the photocatalyst, the chemiluminescence is also generated by the photocatalyst. Used for excitation.

As described above, the harmful substances are decomposed and removed by the discharge part, and the harmful substances not decomposed and removed by the discharge can be surely decomposed and removed by the photocatalyst part 5.

<< Pulse Corona Discharge + Ozone Catalyst Unit >> FIG.
Is characterized in that an ozone catalyst section 9 is provided instead of the photocatalyst section 5 of the apparatus shown in FIG.
Other configurations are the same as those of the harmful substance processing apparatus 1 shown in FIG.

In the above configuration, active chemical species such as radicals and molecular ions are generated by the fast electrons 8 generated by the pulse corona discharge as described above, and these active chemical species chemically react with harmful substances contained in the fluid 3A. And acts to remove harmful substances from the fluid.

The discharge generates ozone and the like, which are so-called metastable chemical species having a relatively long life. This ozone is transported to the ozone catalyst unit 9 by the fluid 3A, and contacts, approaches, or adheres to the ozone catalyst unit 9. This makes it possible to cause a chemical reaction with the harmful substance using the ozone catalyst as a reaction field, and to reliably treat the harmful substance that could not be treated in the discharge unit.

<< Pulse Corona Discharge + Adsorption Catalyst Unit >> A feature of the harmful substance processing apparatus 1 shown in FIG. 3 is that an adsorption catalyst unit 10 is provided instead of the photocatalyst unit 5 of the apparatus shown in FIG. The configuration is the same as that of the harmful substance processing apparatus 1 shown in FIG. In this case, the adsorption catalyst section 10 includes an activated carbon catalyst or the like.

In the above configuration, active chemical species such as radicals and molecular ions are generated by the fast electrons 8 generated by the pulse corona discharge as described above, and these active chemical species chemically react with harmful substances contained in the fluid 3A. And acts to remove harmful substances from the fluid.

In addition, ozone, which is a so-called metastable chemical species having a relatively long life, is generated by the discharge. The adsorption catalyst section 10 removes the ozone and harmful substances that could not be removed in the discharge section by an adsorption action and removes the fluid 3B.
And discharged outside the housing. Thereby, the treatment efficiency of removing harmful substances is further promoted in combination with the treatment by the discharge action.

<< Pulse Corona Discharge + Photocatalyst Unit + Ozone Catalyst Unit >> The harmful substance treatment apparatus 1 shown in FIG. 4 is characterized by an ozone catalyst similar to that shown in FIG. 2 downstream of the photocatalyst unit 5 of the apparatus shown in FIG. 1 is added to the configuration shown in FIG.
This is the same as the harmful substance processing apparatus 1 shown in FIG.

In the above configuration, active chemical species such as radicals and molecular ions are generated by the fast electrons 8 generated by the pulse corona discharge as described above, and these active chemical species and harmful substances contained in the fluid 3A are chemically It reacts to remove harmful substances from the fluid.

Further, as described above, the molecules and atoms contained in the fluid 3A are excited by the high-speed electrons generated by the corona discharge, and excitation light is generated. A harmful substance contained in is caused to undergo a chemical reaction to remove the harmful substance. Fluid 3A
Depending on the substance contained, a chemical reaction accompanied by light emission may occur.If the chemiluminescence at this time has a wavelength that can excite the photocatalyst, this chemiluminescence is also used to excite the photocatalyst. You.

Further, the discharge generates ozone, which is a so-called metastable chemical species having a relatively long life, and the ozone is transported to the ozone catalyst section 9 by the fluid 3A, and contacts, approaches, or adheres to the ozone catalyst section 9. I do. This makes it possible to cause a chemical reaction with the harmful substance using the ozone catalyst as a reaction field, and to reliably treat the harmful substance that could not be treated by the discharge unit or the photocatalyst unit 5.

<< Pulse Corona Discharge + Photocatalyst Unit + Adsorption Catalyst Unit >> The feature of the harmful substance treatment apparatus 1 shown in FIG. 5 is that the same adsorption catalyst as that shown in FIG. 3 is provided downstream of the photocatalyst unit 5 of the apparatus shown in FIG. The other configuration is the same as that of the harmful substance processing apparatus 1 shown in FIG.

In the above configuration, active chemical species such as radicals and molecular ions are generated by the high-speed electrons 8 generated by the pulse corona discharge as described above, and these active chemical species and the harmful substances contained in the fluid 3A are chemically and chemically. It reacts to remove harmful substances from the fluid.

Further, as described above, the molecules and atoms contained in the fluid 3A are excited by the high-speed electrons generated by the corona discharge, and excitation light is generated. A harmful substance contained in is caused to undergo a chemical reaction to remove the harmful substance. Fluid 3A
Depending on the substance contained, a chemical reaction accompanied by light emission may occur.If the chemiluminescence at this time has a wavelength that can excite the photocatalyst, this chemiluminescence is also used to excite the photocatalyst. You.

Further, as described above, the ozone generated by the corona discharge and the harmful substances that could not be removed by the discharge part or the photocatalyst part 5 are removed from the adsorption catalyst part 10 by the adsorption action and become the fluid 3B. It is discharged outside the housing. Thereby, the treatment efficiency of removing harmful substances is further promoted in combination with the treatment by the discharge action and the photocatalytic action.

<< Pulse Corona Discharge + Ozone Catalyst Unit + Adsorption Catalyst Unit >> The harmful substance processing apparatus 1 shown in FIG.
1 is provided with an ozone catalyst unit 9 and an adsorption catalyst unit 10 similar to those shown in FIGS. 2 and 3 in place of the photocatalyst unit 5 of the apparatus shown in FIG. Is the same as

In the above configuration, active chemical species such as radicals and molecular ions are generated by the high-speed electrons 8 generated by the pulse corona discharge as described above, and these active chemical species and harmful substances contained in the fluid 3A are chemically and chemically. It reacts to remove harmful substances from the fluid.

The discharge generates ozone, which is a so-called metastable chemical species having a relatively long life, and the ozone is transported to the ozone catalyst section 9 by the fluid 3A, and comes into contact with, approaches, or adheres to the ozone catalyst section 9. I do. This allows
The ozone catalyst is used as a reaction field to cause a chemical reaction with the harmful substance, so that the harmful substance that cannot be treated by the discharge unit or the photocatalyst unit 5 can be surely treated.

Further, as described above, unnecessary ozone and harmful substances generated by the corona discharge and not used in the ozone catalyst section 9 are removed by the adsorbing action of the adsorbing catalyst section 10 and the outside of the housing is formed as a fluid 3B. Is discharged.
Thereby, the treatment efficiency of removing harmful substances is further promoted in combination with the treatment by the discharge action and the photocatalytic action.

<< Pulse Corona Discharge + Adsorption Catalyst Unit + Ozone Catalyst Unit >> The harmful substance treatment apparatus 1 shown in FIG.
Instead of the photocatalyst section 5 of the apparatus shown in FIG. 1, an adsorption catalyst section 10 and an ozone catalyst section 9 are provided downstream of the discharge section in the reverse order of the apparatus shown in FIG. This is the same as the harmful substance processing apparatus 1 shown in FIGS.

In the above configuration, active chemical species such as radicals and molecular ions are generated by the high-speed electrons 8 generated by the pulse corona discharge as described above, and these active chemical species and harmful substances contained in the fluid 3A are chemically and chemically. It reacts to remove harmful substances from the fluid.

Further, as described above, unnecessary ozone and harmful substances generated by corona discharge are removed from the adsorption catalyst section 1.
It is removed by an adsorption action of zero.

Further, ozone and harmful substances not adsorbed by the adsorption catalyst section 10 are transported to the ozone catalyst section 9 by the fluid 3A, and come into contact with, approach to, or adhere to the ozone catalyst section 9. Thus, a chemical reaction occurs with the harmful substance using the ozone catalyst as a reaction field, and the harmful substance that could not be treated by the discharge unit or the adsorption catalyst unit 10 can be reliably treated and discharged out of the housing as the fluid 3B. .

<< Pulse Corona Discharge + Photocatalyst Unit + Ozone Catalyst Unit + Adsorption Catalyst Unit >> The harmful substance treatment apparatus 1 shown in FIG. 8 is characterized in that it is located downstream of the photocatalyst unit 5 of the apparatus shown in FIG. 1 in that an ozone catalyst unit 9 and an adsorption catalyst unit 10 similar to those shown in FIG. 1 are added, and the other configuration is the same as that of the harmful substance processing apparatus 1 shown in FIG.

In the above configuration, active chemical species such as radicals and molecular ions are generated by the high-speed electrons 8 generated by the pulse corona discharge as described above, and these active chemical species and harmful substances contained in the fluid 3A are chemically removed. It reacts to remove harmful substances from the fluid.

Further, as described above, the molecules and atoms contained in the fluid 3A are excited by the high-speed electrons generated by the corona discharge, and excitation light is generated. A harmful substance contained in is caused to undergo a chemical reaction to remove the harmful substance. Fluid 3A
Depending on the substance contained, a chemical reaction accompanied by light emission may occur.If the chemiluminescence at this time has a wavelength that can excite the photocatalyst, this chemiluminescence is also used to excite the photocatalyst. You.

Further, the discharge generates ozone, which is a so-called metastable chemical species having a relatively long life, and this ozone is transported to the ozone catalyst section 9 by the fluid 3A, and comes into contact with, approaches, or adheres to the ozone catalyst section 9. I do. This makes it possible to cause a chemical reaction with the harmful substance using the ozone catalyst as a reaction field, and to reliably treat the harmful substance that could not be treated by the discharge unit or the photocatalyst unit 5.

Further, as described above, unnecessary ozone generated by the corona discharge and not used in the ozone catalyst section 9, the discharge section, the photocatalyst section 5 and the ozone catalyst section 9.
The harmful substances which have not been treated in the above are removed by the adsorption action of the adsorption catalyst section 10 and discharged out of the housing as the fluid 3B. Thus, the treatment efficiency of removing harmful substances can be further promoted in combination with the treatment by the discharge action, the ozonolysis action and the photocatalysis action.

<< Pulse Corona Discharge + Adsorption Catalyst Unit + Ozone Catalyst Unit + Adsorption Catalyst Unit >> The harmful substance treatment apparatus 1 shown in FIG. 9 is characterized in that the photocatalyst unit 5 of the apparatus shown in FIG. This is provided with a unit 10A, an ozone catalyst unit 9, and a second adsorption catalyst unit 10B, and the other configuration is the same as that of the harmful substance processing apparatus 1 shown in FIG.

In the above configuration, as described above, active chemical species such as radicals and molecular ions are generated by the fast electrons 8 generated by the pulse corona discharge, and these active chemical species chemically react with harmful substances contained in the fluid 3A. And acts to remove harmful substances from the fluid.

The discharge generates ozone, which is a so-called metastable chemical species having a relatively long life. The first adsorption catalyst section 10A removes the ozone and harmful substances that could not be removed by the discharge section by an adsorption action.

Ozone not adsorbed by the first adsorption catalyst section 10A is transported to the ozone catalyst section 9 by the fluid 3A and causes a chemical reaction with harmful substances using the ozone catalyst as a reaction field, thereby causing the discharge section and the first Hazardous substances that could not be treated by the adsorption catalyst unit 10A are surely treated.

Further, unnecessary ozone not used in the ozone catalyst section 9 and harmful substances not treated are removed by the adsorption action of the second adsorption catalyst section 10B and the fluid 3 is removed.
B is discharged out of the housing. This allows the discharge action,
The treatment efficiency of the removal of harmful substances can be further promoted in combination with the treatment by the first adsorption action and the ozonolysis action.

<< Creepage Discharge + Photocatalyst Unit >> A feature of the harmful substance processing apparatus 1 shown in FIG. 10 is that the corona discharge unit of the apparatus shown in FIG.

In this case, the surface discharge section 14 is
And a dielectric flat plate 13 provided substantially perpendicular to the electrode 12. Further, a high-voltage AC power supply unit 17 is connected to the electrode 12 via the wiring 16.

According to the above configuration, the same operation and effect as the harmful substance processing apparatus 1 shown in FIG. 1 can be obtained, and the discharge section is formed as the creeping discharge section 14, so that the apparatus configuration can be made compact. It works.

<< Creepage Discharge + Photocatalyst Unit + Ozone Catalyst Unit >> A feature 10 of the harmful substance processing apparatus 1 shown in FIG. 11 is that the corona discharge unit of the apparatus shown in FIG.

According to the above configuration, the same operation and effects as those of the harmful substance processing apparatus 1 shown in FIG. 4 can be obtained, and the discharge section is formed as the creeping discharge section 14, so that the apparatus configuration can be made compact. It works.

<< Creepage Discharge + Photocatalyst Unit + Adsorption Catalyst Unit >> FIG. 1
The characteristic of the harmful substance treatment apparatus 1 shown in FIG. 2 is that the corona discharge section of the apparatus shown in FIG.

According to the above configuration, the same operation and effect as those of the harmful substance processing apparatus 1 shown in FIG. 5 can be obtained, and the discharge section is the creeping discharge section 14, so that the apparatus configuration can be made compact. It works.

<< Creepage Discharge + Ozone Catalyst Unit + Adsorption Catalyst Unit >>
The harmful substance processing apparatus 1 shown in FIG. 13 is different from the apparatus shown in FIG. 6 in that the corona discharge section is replaced with a creeping discharge section 14.

According to the above configuration, the same operation and effect as the harmful substance processing apparatus 1 shown in FIG. 6 can be obtained, and the discharge section is the creeping discharge section 14, so that the apparatus configuration can be made compact. It works.

<< Creepage Discharge + Adsorption Catalyst Unit + Ozone Catalyst Unit >>
The harmful substance treatment apparatus 1 shown in FIG. 14 is different from the apparatus shown in FIG. 7 in that the corona discharge section is replaced with a surface discharge section 14.

According to the above configuration, the same operation and effect as the harmful substance processing apparatus 1 shown in FIG. 7 can be obtained, and since the discharge section is the creeping discharge section 14, the apparatus configuration can be made compact. It works.

<< Creepage Discharge + Photocatalyst Unit + Ozone Catalyst Unit + Adsorption Catalyst Unit >> In the harmful substance treatment apparatus 1 shown in FIG. 15, the corona discharge unit of the apparatus shown in FIG.

According to the above configuration, the same operation and effect as the harmful substance processing apparatus 1 shown in FIG. 8 can be obtained, and since the discharge section is the creeping discharge section 14, the apparatus configuration can be made compact. It works.

<< Creepage discharge + adsorption catalyst section + ozone catalyst section +
Adsorption catalyst section >> The harmful substance treatment apparatus 1 shown in FIG.
Is that the corona discharge section of the apparatus shown in FIG.

According to the above configuration, the same operation and effect as the harmful substance processing apparatus 1 shown in FIG. 9 can be obtained, and since the discharge section is the creeping discharge section 14, the apparatus configuration can be made compact. It works.

<< Photocatalyst Unit + Pulse Corona Discharge >> The harmful substance processing apparatus 1 shown in FIG. 17 has a point that a photocatalyst unit 5 is provided on the upstream side of the pulse corona discharge unit.

As described above, the photocatalyst unit 5 is activated by the excitation light or the like from the discharge unit. It is not limited.

Therefore, according to the above configuration, the same operation and effect as those of the harmful substance processing apparatus 1 shown in FIG. 1 can be obtained.

<< Photocatalyst Unit + Pulse Corona Discharge + Photocatalyst Unit >> The harmful substance processing apparatus 1 shown in FIG. 18 is characterized in that it is located downstream of the discharge unit in addition to the first photocatalyst unit 5A arranged upstream of the discharge unit. Also in that the second photocatalyst unit 5B is provided.

According to the above configuration, since the photocatalyst section is provided upstream and downstream of the discharge section, the excitation light and the chemiluminescence generated by the discharge action can be effectively used, and even if the energy consumption is small, the harmful substance is used. The processing efficiency can be improved.

<< Photocatalyst Unit + Creepage Discharge >> The harmful substance treating apparatus 1 shown in FIG. 19 is different from the apparatus shown in FIG. 17 in that the pulse corona discharge unit is replaced with a surface discharge unit 14.

According to the above configuration, the same operation and effect as those of the harmful substance processing apparatus 1 shown in FIG.
Since the discharge unit is the surface discharge unit 14, an effect is obtained that the device configuration can be made compact.

<< Photocatalyst Unit + Creepage Discharge + Photocatalyst Unit >> FIG.
The harmful substance processing apparatus 1 shown in FIG. 18 is different from the apparatus shown in FIG. 18 in that the pulse corona discharge unit is replaced with a surface discharge unit 14.

According to the above configuration, the same operation and effect as those of the harmful substance processing apparatus 1 shown in FIG.
Since the discharge unit is the surface discharge unit 14, an effect is obtained that the device configuration can be made compact.

<Other Examples of Arrangement and Configuration Using Photocatalyst> As described above, the photocatalyst part can partially or completely discharge the discharge part as long as the excitation light or the chemiluminescence generated in the discharge part can be used. It can be arranged surrounding. A harmful substance processing apparatus 1 shown in FIG. 21 has a cylindrical housing 2 for discharging and discharging a fluid 3A containing a harmful substance from an opening, and is disposed in the housing 2 near a central axis along a flow direction of the fluid 3A. A high voltage terminal 4 and a photocatalyst 21 applied to the entire or partial surface of the inner surface of the housing. A pulse corona discharge occurs between the housing 4 and the housing 2. At this time, the light generated by the discharge activates the photocatalyst 21 applied to the inner surface of the housing, and the fluid 3A passing through the inside of the housing 2
Treat harmful substances contained in it.

As described above, by providing the photocatalyst 21 in the direction parallel to the flow of the fluid 3A, the light generated in the discharge portion is efficiently absorbed by the photocatalyst 21, and the photocatalyst 21 can be efficiently activated. Further, according to the above configuration, there is nothing to block the flow of the fluid 3A,
The pressure loss generated in A can be suppressed low, and the processing efficiency is further improved.

The harmful substance treating apparatus 1 shown in FIG. 22 has a configuration in which a plurality of photocatalyst units 5 formed in a flat plate shape are stacked at predetermined intervals and a discharge unit 22 is provided between the photocatalyst units 5. .

In this case, the photocatalyst section 5 has a structure such as a honeycomb structure that allows the fluid 3A to pass therethrough.
The layers are vertically stacked with respect to the flow direction of the fluid 3A. Although not shown, a plurality of high voltage terminals and a ground electrode are inserted between the photocatalyst portions 5, and a pulse discharge is generated between the high voltage terminal and the ground electrode. Are activated.

According to the above configuration, the interaction between the photocatalyst unit 5 and the discharge unit 22 in a plurality of stages enables efficient processing even with a compact device configuration.

In the harmful substance processing apparatus 1 shown in FIG. 23, two high voltage terminals 23, 23 are provided in the housing 2 in a direction perpendicular to the flow of the fluid 3A.
The first photocatalyst portion 5A, the second photocatalyst portion 5B, and the third photocatalyst portion 5C are arranged so as to surround the first photocatalyst portion 5A.

In this case, the high voltage terminal 23 is
And a cylindrical ground electrode 25 surrounding the high voltage terminal 23 is disposed, and a pulse corona discharge is generated between the ground electrode 25 and the high voltage terminal 23.

According to the above configuration, it is possible to improve the processing efficiency while using a compact device.

In the harmful substance processing apparatus 1 shown in FIG. 24, two high voltage terminals 23, 23 are provided in the housing 2 in a direction perpendicular to the flow of the fluid 3A, and around the high voltage terminal 23. The first cylindrical photocatalyst section 26A and the second cylindrical photocatalyst section 26B are arranged so as to surround the first cylindrical photocatalyst section 26A. In this case, the first and second cylindrical photocatalysts 26
A wire mesh or spiral ground electrode is arranged on the inner surface of A, 26B.

As described above, FIG. 1, FIG. 10, FIG. 17, and FIG.
In the embodiment using the photocatalyst unit 5 exemplified in the above, only the discharge light applied to the upstream side or the downstream side of the fluid can be used for activating the catalyst, whereas in the embodiment shown in FIG. The entire circumference of the high voltage terminal 23 is covered with the photocatalyst units 26A,
Since it is surrounded by B, more discharge light can be used for activating the catalyst. In the embodiment using the photocatalyst unit 5 illustrated in FIG. 21, the fluid passes through the surface of the photocatalyst unit 5, whereas in the embodiment illustrated in FIG. 24, the fluid passes inside the photocatalyst unit 5. For this reason, the contact efficiency between the fluid and the photocatalyst unit 5 increases, and the processing efficiency in the photocatalyst unit further improves.

<Embodiment> In each of the embodiments using the photocatalyst described above, the housing 2 may be a closed system or an open system, and if there is no need to consider the leakage of the fluid 3A,
The upper surface, the side surface, or the entire surface may be open.

Further, the example of the photocatalyst unit is not limited to the above embodiment, and the high-speed electrons generated from the discharge unit are not limited to the photocatalyst unit.
And any structure that allows the fluid 3A to pass therethrough, such as a lattice, a door, a sponge, a line, a mesh, a packed layer, and the like. When the fluid 3A is a liquid or a viscous fluid, the photocatalyst itself may be suspended in the fluid.

As the photocatalyst, an active component containing, for example, titanium oxide, zinc oxide, or cadmium sulfide as a main component is applied. Further, the active component may be supported on a photocatalyst carrier for the purpose of improving strength or molding. In this case, depending on the substance for the reaction, platinum,
A compound containing at least one selected from gold and alloys of these metals and their transition elements may be supported.

A power supply combining them is applied.

Further, in each of the above-described embodiments, the catalyst unit disposed in the housing 2 may be provided upstream of the discharge unit (when the photocatalyst unit is disposed upstream of the discharge unit, The adsorption catalyst unit 10 is disposed upstream (upstream), and harmful substances that can be adsorbed by the adsorption catalyst unit 10 are first removed from the fluid 3A containing the harmful substances flowing into the housing 2 and then discharged or treated. You may comprise so that it may transfer to a photocatalyst process etc.

In each of the above embodiments, the fluid 3A may be constantly circulated in the housing 1, or may be repeatedly circulated and stopped. For example, a so-called batch-type process may be used in which the casing 2 is once filled with the fluid 3A and is taken out after a certain period of time. In order to promote the contact between the fluid 3A and the photocatalyst, a technique such as natural convection or forced convection may be employed.

Although the power supply unit 7 used for the discharge unit uses a pulse power supply and the power supply unit 17 uses an AC power supply, it may be any of a DC power supply, a high-frequency power supply, or a power supply combining these.

The harmful substance treatment apparatus 1 described in each of the above embodiments treats an incinerator exhaust gas treatment system for treating dioxins or NOx, a deodorization system for treating odor components, or a treatment for volatile organic substances or NOx. It is effective for use in factory process gas treatment systems.

[0115]

Next, an embodiment of the present invention will be described with reference to FIGS. In the following embodiment, the processing rate is defined as follows.

[0116]

## EQU1 ## Treatment rate (%) = {(initial concentration-outlet concentration) / initial concentration} × 100 << Examples of Acetaldehyde Treatment >> The comparative examples 1, 2 and 1 were examined for the acetaldehyde treatment rates. In this test, Comparative Example 1 had only a discharge portion (pulse corona discharge), Comparative Example 2 had only a photocatalyst portion, and Example 1 had a discharge portion + a photocatalyst portion (using the harmful substance treatment apparatus shown in FIG. 2).
It is. Table 1 shows the test conditions at that time.

[0117]

[Table 1] FIG. 25 shows the treatment rates of acetaldehyde obtained in the above test. As can be understood from the figure, the treatment rate of acetaldehyde was 50% in Comparative Example 1 and 2% in Comparative Example 2, whereas the treatment rate of Example 1 was as high as 90%.

<< NOx Processing Example >> The NOx processing rates of Comparative Example 1, Comparative Example 2, Example 1, and Example 2 were examined.
Note that in this test, Comparative Example 1 had only a discharge portion (pulse corona discharge), Comparative Example 2 had only a photocatalyst portion, and Example 1 had a discharge portion + a photocatalyst portion (using the harmful substance processing apparatus shown in FIG. 2). Example 2 is a first photocatalyst section + a discharge section + a second photocatalyst section (using the harmful substance processing apparatus shown in FIG. 18). Table 2
Shows the test conditions at that time.

[0119]

[Table 2] FIG. 26 shows the NOx treatment rates obtained in the above test. As understood from the figure, the processing rate of NOx is
Comparative Example 1 showed 50% and Comparative Example 2 2%, whereas Example 1 showed a processing rate as high as 70% and Example 2 showed a processing rate as high as 90%.

<< Example of Hydrogen Sulfide Treatment >> Comparative Example 1, Example 1,
In Examples 2 and 3, the treatment rate of hydrogen sulfide was examined. In this test, Comparative Example 1 had only a discharge portion (pulse corona discharge), Example 1 had a discharge portion + a photocatalyst portion (using the harmful substance treatment device shown in FIG. 2), and Example 2 had a discharge portion + a photocatalyst portion. In Example 3, a discharge unit + a photocatalyst unit + a zeolite-based catalyst unit + (activated carbon-based) adsorption catalyst unit (Fig. 8 (surface creeping discharge) In the case of (1), an apparatus similar to the harmful substance processing apparatus shown in FIG. 15) is used. Table 3 shows the test conditions at that time.

[0121]

[Table 3] FIG. 27 shows the treatment rates of hydrogen sulfide obtained in the above test. As can be understood from the figure, the treatment rate of the fluidized hydrogen was 50% in Comparative Example 1, whereas the treatment rate of Example 1 was 50%.
85% in Example 2, 95% in Example 2, and 100% in Example 3.
%.

Regarding the processing rate of this hydrogen sulfide,
A test was also conducted when the discharge section was changed from pulse corona discharge to creeping discharge, but almost the same results as in FIG. 27 could be obtained. Table 4 shows creeping discharge (Example 2 of hydrogen sulfide treatment)
The test conditions are shown below.

[0123]

[Table 4] << Example of ozone treatment >> With respect to Comparative Example 1, Comparative Example 2, and Example 1, the amount of remaining ozone (ppm) was examined. In this test, in Comparative Example 1, the discharge portion (pulse corona discharge) was used.
Only Comparative Example 2 is a discharge unit + photocatalyst unit, and Example 1 is a discharge unit + photocatalyst unit + ozone catalyst unit (using the harmful substance processing apparatus shown in FIG. 4 (FIG. 11 in the case of creeping discharge)). Table 5
Shows the test conditions at that time.

[0124]

[Table 5] FIG. 28 shows the residual ozone amount (ppm) obtained in the above test.
Is shown. As can be understood from the figure, the residual ozone amount was 95 ppm in Comparative Example 1, and in Comparative Example 2,
In contrast to 10 ppm, the amount of residual ozone in Example 1 was 0, indicating an extremely high ozone treatment rate.

Further, the residual ozone amount was also tested in the case where the discharge portion was changed from the pulse corona discharge to the creeping discharge, and almost the same results as in FIG. 28 could be obtained. Table 6 shows test conditions during creeping discharge (ozone treatment example 2).

[0126]

[Table 6]

[0127]

As described above, according to the present invention, it is possible to provide a harmful substance treating apparatus capable of efficiently removing harmful substances by utilizing the relationship between discharge and various catalysts. .

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing a configuration example (pulse corona discharge + photocatalyst unit) of an embodiment of a harmful substance treatment apparatus according to the present invention.

FIG. 2 is an explanatory view schematically showing a configuration example (pulse corona discharge + ozone catalyst unit) of another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 3 is an explanatory view schematically showing a configuration example (pulse corona discharge + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 4 is an explanatory view schematically showing a configuration example (pulse corona discharge + photocatalyst section + ozone catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 5 is an explanatory view schematically showing a configuration example (pulse corona discharge + photocatalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 6 is an explanatory view schematically showing a configuration example (pulse corona discharge + ozone catalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 7 is an explanatory view schematically showing a configuration example (pulse corona discharge + adsorption catalyst section + ozone catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 8 is an explanatory view schematically showing a configuration example (pulse corona discharge + photocatalyst section + ozone catalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 9 is an explanatory view schematically showing a configuration example (pulse corona discharge + adsorption catalyst section + ozone catalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 10 is an explanatory view schematically showing a configuration example (creeping discharge + photocatalytic section) of still another embodiment of the harmful substance treating apparatus according to the present invention.

FIG. 11 is an explanatory view schematically showing a configuration example (creeping discharge + photocatalyst section + ozone catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 12 is a configuration example of a harmful substance treatment apparatus according to still another embodiment of the present invention (creeping discharge + photocatalyst section + adsorption catalyst section).
It is explanatory drawing which shows typically.

FIG. 13 is an explanatory view schematically showing a configuration example (creeping discharge + ozone catalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 14 is an explanatory view schematically showing a configuration example (creeping discharge + adsorption catalyst section + ozone catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 15 is an explanatory view schematically showing a configuration example (creep discharge + photocatalyst section + ozone catalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 16 is an explanatory view schematically showing a configuration example (creeping discharge + adsorption catalyst section + ozone catalyst section + adsorption catalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 17 is an explanatory view schematically showing a configuration example (photocatalyst section + pulse corona discharge) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 18 is an explanatory view schematically showing a configuration example (photocatalyst section + pulse corona discharge + photocatalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 19 is an explanatory view schematically showing a configuration example (photocatalyst section + creeping discharge) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 20 is an explanatory view schematically showing a configuration example (photocatalyst section + surface discharge + photocatalyst section) of still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 21 is an explanatory view schematically showing an example of an arrangement configuration of a photocatalyst unit which is still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 22 is an explanatory view schematically showing an example of an arrangement configuration of a photocatalyst unit which is still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 23 is an explanatory view schematically showing an example of an arrangement configuration of a photocatalyst unit which is still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 24 is an explanatory view schematically showing a configuration example of a photocatalyst section which is still another embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 25 is an explanatory view showing an example of acetaldehyde treatment which is an embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 26 is an explanatory view showing an example of NOx processing which is an embodiment of the harmful substance processing apparatus according to the present invention.

FIG. 27 is an explanatory view showing a hydrogen sulfide treatment which is an embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 28 is an explanatory view showing an example of ozone treatment which is an embodiment of the harmful substance treatment apparatus according to the present invention.

FIG. 29 is an explanatory view showing the principle of a catalyst section excited by light applied to the harmful substance treatment apparatus according to the present invention.

FIG. 30 is an explanatory view showing the principle of a catalyst section functioning as a reaction field for active chemical species applied to the harmful substance treating apparatus according to the present invention.

FIG. 31 is an explanatory view showing the principle of a catalyst unit having an adsorption action applied to the harmful substance treatment apparatus according to the present invention.

FIG. 32 is an explanatory view showing the principle of treating harmful substances by electric discharge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hazardous substance processing apparatus 2 Housing 2A Inlet 2B Outlet 3A Fluid (before harmful substance removal) 3B Fluid (after harmful substance removal) 4 High voltage terminal 5 Photocatalyst part 5A First photocatalyst part 5B Second photocatalyst part 6 Wiring 7 Power supply part (Pulse power supply) 8 High-speed electron 9 Ozone catalyst unit 10 Adsorption catalyst unit 10A First adsorption catalyst unit 10B Second adsorption catalyst unit 9 Exciting fluid 12 Electrode 13 Flat plate 14 Surface discharge unit 15 High-speed electron 16 Wiring 17 Power supply unit (AC power supply) 21) Photocatalyst 22 Discharge unit 23 High voltage terminal 24 Insulation unit 25 Ground electrode 26A First cylindrical photocatalyst unit 26B Second cylindrical photocatalyst unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) B01J 21/06 B01D 53/36 ZABG 35/02 101A (72) Inventor Yasuyuki Yasui Suehiro, Tsurumi-ku, Yokohama, Kanagawa Prefecture 2-4 cho, Toshiba Keihin Works Co., Ltd. F-term (reference) 2E191 BA15 BD13 BD17 4D048 AA06 AA11 AA17 AA19 AA22 AB01 AB03 BA05X BA07X BA11X BA16Y BA41X BA46Y BB01 BB02 CC32 CC38 CC44 EA01 EA03 BA04A07 BA04B07A CA13 CA15 CA17 CA19 DA06 EA01Y EA18 4G075 AA37 BA05 BA08 BB04 CA15 CA18 CA32 CA54 EB01

Claims (7)

[Claims] 1. A casing into which a fluid containing a harmful substance flows, and a fluid from which the harmful substance is treated is discharged, a discharge unit that performs a discharge process on a fluid in the casing, and a discharge part is included in the fluid. A harmful substance processing apparatus, comprising: a catalyst section for converting harmful substances into non-toxic substances or removing harmful substances contained in the fluid. 2. The harmful substance processing apparatus according to claim 1, wherein the catalyst section has a photocatalyst section having a photocatalyst activated by light generated by discharge of the discharge section, and is generated by discharge of the discharge section. The apparatus for treating harmful substances according to any one of claims 1 to 3, wherein the catalyst section functions as a reaction field for active chemical species, an adsorption catalyst section having an adsorption action, or a combination of these catalyst sections. 3. The harmful substance processing apparatus according to claim 1, wherein the photocatalyst section constituting the catalyst section is provided upstream and / or downstream of the discharge section. apparatus. 4. The apparatus for treating harmful substances according to claim 2, wherein the photocatalyst section constituting the catalyst section is arranged so as to surround part or all of the discharge section. Hazardous substance processing equipment. 5. The harmful substance processing apparatus according to claim 1, wherein the catalyst unit that functions as a reaction field for an active chemical species generated by the discharge of the discharge unit that constitutes the catalyst unit, A harmful substance processing apparatus, which is disposed downstream of the discharge unit or downstream of a photocatalyst unit disposed downstream of the discharge unit. 6. The harmful substance processing apparatus according to claim 1, wherein the adsorption catalyst section constituting the catalyst section is provided upstream and / or downstream of the discharge section. In the case where the photocatalyst unit is arranged upstream, the photocatalyst unit is arranged upstream of the photocatalyst unit, and when the photocatalyst unit is arranged downstream of the discharge unit, the photocatalyst unit is arranged The harmful substance treatment device, which is disposed downstream of the photocatalyst unit when the harmful substance treatment is performed. 7. An incinerator exhaust gas treatment system for treating dioxins or NOx, a deodorization system for treating odor components, or a volatile organic substance or NOx, wherein the harmful substance treatment apparatus according to claim 1 Used in a factory process gas treatment system for treating harmful substances.