JP2016147012A - Decomposition apparatus, and operation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decomposition apparatus capable of reducing replacement frequency of an adsorption unit and a NOx filter and suppressing a running cost low, and an operation method thereof.SOLUTION: A decomposition apparatus includes a NOx filter 6 for removing NOx, an adsorption unit 3 for adsorbing contaminants contained in a gas 31, and a switching device 9 for performing switching between an adsorption/decomposition state and a regeneration state, on a downstream side of an ozone generation mechanism 2. In the adsorption/decomposition state, the gas 31 containing the contaminants is made to flow through an adsorption channel to adsorb the contaminants by the adsorption unit 3 while stopping the ozone generation mechanism 2. In the regeneration state, the gas 31 containing the contaminants is made to flow through a regeneration channel to decompose the contaminants adsorbed by the adsorption unit 3 and to remove the NOx in the NOx filter 6 while activating the ozone generation mechanism 2.SELECTED DRAWING: Figure 1

Description

  The present invention includes an air blowing mechanism for circulating a gas containing a pollutant such as an odorous substance, an ozone generating mechanism for generating ozone, and an adsorption portion that is provided downstream of the ozone generating mechanism and adsorbs the pollutant. The present invention relates to a disassembling apparatus provided and a method for operating the same.

  Known pollutants such as odorous substances that cause problems in the indoor environment include volatile organic chemical substances such as acetic acid, acetaldehyde, and formaldehyde, and ammonia produced by decomposition of organic substances.

  Using the above-described decomposition apparatus, pollutants generated in the indoor environment are mixed and decomposed with, for example, ozone gas (hereinafter simply referred to as “ozone”) generated by generating plasma with a discharge apparatus while supplying air. In addition, it is known that pollutants can be decomposed more efficiently by combining ozone and an ozonolysis catalyst filter (eg, manganese oxide) (see, for example, paragraph [0005] of Patent Document 1).

In the method using plasma, not only ozone but also nitrogen oxides (hereinafter abbreviated as “NOx”) are generated as a by-product.
Since ozone and NOx are substances harmful to the human body, it is necessary to remove them so that they are not supplied to the indoor environment (see, for example, paragraph [0003] of Patent Document 2).

For the removal of ozone, a method using an ozone decomposition catalyst filter (an example of an adsorbing part) composed of manganese (Mn) oxide or the like is widely used. Decomposition by ozone causes the decomposition of pollutants as the decomposition of ozone occurs, but the ozone decomposition catalyst filter promotes the decomposition of ozone, and the decomposition of the contaminants occurs as the decomposition of ozone occurs. Since this occurs, ozone and pollutants can be effectively removed, which is preferable.
On the other hand, for the removal of NOx, a method of decomposing and removing with a NOx filter is widely used.

JP 2012-202637 A JP 2006-136822 A

  However, in general, when pollutants are decomposed using filters, the energy consumption for air supply increases according to the pressure loss. In particular, when the pollutant is configured to pass through both the ozone decomposition catalyst filter and the NOx filter, an increase in energy consumption accompanying an increase in pressure loss becomes significant.

  Moreover, to reduce the pressure loss of the ozone decomposition catalyst filter and NOx filter, it is sufficient to lower the inlet air speed of the filter. However, this increases the size of the filter, which is not preferable because the entire decomposition apparatus is enlarged, and conversely compact. When an ozonolysis catalyst filter and NOx filter of a proper size are used, the pressure loss becomes high and the NOx removal capability becomes insufficient. As a result, the ozonolysis catalyst filter and NOx filter break through in a short period of time. There is a problem that the frequency of replacement of the filter increases, the convenience is impaired, and the running cost increases.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a decomposition apparatus that can reduce the replacement frequency of the adsorption unit and the NOx filter and that can suppress the running cost, and an operation method thereof.

In order to achieve the above object, a decomposition apparatus according to the present invention is provided on the downstream side of a blower mechanism for passing a gas containing pollutants, an ozone generation mechanism for generating ozone by plasma, and the ozone generation mechanism. A decomposing apparatus comprising an adsorbing part that adsorbs the contaminants, the characteristic configuration of which is
A NOx filter provided on the downstream side of the ozone generation mechanism to remove NOx;
An adsorption flow path for allowing the gas containing the contaminant to flow through the adsorption portion;
A regeneration flow path for allowing the gas containing the pollutant to flow in the order of the adsorption unit and the NOx filter, or in the order of the NOx filter and the adsorption unit;
While stopping the ozone generation mechanism, the gas containing the pollutant is passed through the adsorption flow path, and the adsorption decomposition state in which the pollutant is adsorbed by the adsorption unit, and the ozone generation mechanism is operated. However, the gas containing the pollutant is allowed to flow through the regeneration flow path to decompose the pollutant adsorbed on the adsorbing portion and switch to a regeneration state in which NOx is removed by the NOx filter. And a switching unit.

  According to this characteristic configuration, since the decomposition apparatus includes the switching unit, the adsorption decomposition state in which the gas containing the pollutant is passed through the adsorption flow path in a state where the ozone generation mechanism is stopped, and the ozone generation mechanism It is possible to freely switch to a regeneration state in which a gas containing a pollutant is passed through the regeneration channel while operating. Thus, the ozone generation mechanism does not always need to be operated, but only needs to be operated in the regeneration state, so that the generation amount of ozone and NOx can be reduced, and the replacement frequency of the adsorption unit and the NOx filter can be reduced.

  And when it is in an adsorptive decomposition state, the pollutant can be once adsorbed to the adsorbing part and decomposed by passing a gas containing the pollutant through the adsorbing part. Thereby, while it is set as the structure which can adsorb | suck a contaminant reliably in an adsorption | suction part, since gas is not allowed to flow through a NOx filter with a large pressure loss, the energy required for ventilation | gas_flowing can be decreased.

On the other hand, after the pollutant is adsorbed by the adsorption unit, when the switching unit switches to the regeneration state, in the regeneration state, the ozone generation mechanism is operated to generate ozone, and the ozone is generated together with the gas containing the contaminant. Supply to the adsorption section. At this time, the pollutant adsorbed on the adsorbing portion can be decomposed by ozone. Further, in the regeneration state, NOx is generated as a by-product due to the operation of the ozone generation mechanism, but the NOx can be removed by a NOx filter.
Therefore, in the regenerated state, the contaminant adsorbed on the adsorption part is decomposed and at the same time the ability to adsorb the contaminant in the adsorption part is regenerated (hereinafter referred to as “reactivation” to regenerate the contaminant adsorption capacity of the adsorption part). And the suction part can be used repeatedly, so that the replacement frequency of the suction part can be reduced.
Further, since ozone can be supplied after increasing the concentration of the pollutant in the adsorption section, the decomposition efficiency of the pollutant by ozone is increased, and the amount of ozone necessary for the decomposition of the pollutant can be reduced. As a result, the amount of NOx generated as a by-product can be reduced, and the frequency of replacement of the NOx filter can be reduced while keeping the entire decomposition apparatus compact.

  Furthermore, when at least a part of the contaminants adsorbed on the adsorption unit is decomposed and removed in the regeneration state, the switching unit switches the state, does not generate ozone, and operates in an adsorption decomposition state with low pressure loss. Can be started again. Thus, the decomposition operation can be continued by repeating the adsorption decomposition state and the regeneration state.

  As described above, according to this feature configuration, ozone is supplied to the adsorption unit after the contaminant is adsorbed to the adsorption unit, and the gas is allowed to flow through the NOx filter only when ozone is generated. Thus, the amount of NOx generated can be reduced, and the replacement frequency of the adsorption unit and the NOx filter can be reduced.

  The further characteristic configuration of the decomposition apparatus according to the present invention is such that the adsorption flow path is configured to flow a gas containing the contaminant in the order of the ozone generation mechanism and the adsorption section, and the regeneration flow path is The gas containing the pollutant is configured to flow in the order of the ozone generation mechanism, the adsorption unit, the NOx filter, or the ozone generation mechanism, the NOx filter, and the adsorption unit.

According to this characteristic configuration, since the ozone can be reliably brought into contact with the gas containing the pollutant in the regeneration state in which the ozone generation mechanism is operated to generate the plasma, the decomposition capability of the decomposition apparatus Can be improved.
As a result, the decomposition capacity of the cracking device increases, so that the amount of ozone generated can be reduced. As a result, the amount of NOx generated as a by-product is reduced, and the entire cracking device is kept compact, while a NOx filter or the like. Can be replaced less frequently.

  A further characteristic configuration of the decomposition apparatus according to the present invention is such that in the regeneration state in which the ozone generation mechanism is operating, the adsorption unit flows more than in the adsorption decomposition state in which the ozone generation mechanism is stopped. In the point which is comprised so that the flow volume of the gas containing the said contaminant may become small.

According to this characteristic configuration, it is possible to lengthen the residence time of ozone in the adsorption unit in the regeneration state, and it becomes possible to reactivate the adsorption unit more efficiently by ozone. can do.
Further, it is possible to reduce the amount of ozone flowing directly downstream of the adsorption unit without contributing to decomposition at the adsorption unit. That is, since the decomposition contribution rate that ozone contributes to the decomposition of the pollutant increases, the amount of ozone necessary for the decomposition of the pollutant can be further reduced. As a result of further reducing the amount of ozone generated, the amount of NOx generated as a by-product can be further reduced, and the replacement frequency of the NOx filter or the like can be further reduced. Furthermore, since the flow rate is reduced, the pressure loss in the NOx filter or the like can be reduced, and the energy consumption can be reduced.

  A further characteristic configuration of the decomposition apparatus according to the present invention is that the adsorption unit includes an ozone decomposition removal unit that decomposes ozone together with the contaminant.

According to this configuration, the adsorption unit includes the ozone decomposing / removing unit, so that after the contaminant is physically adsorbed to the adsorption unit, ozone is supplied to the adsorption unit and the contaminant adsorbed in the adsorption unit It can decompose ozone.
As a result, the efficiency of decomposing contaminants at the adsorbing portion increases, and the adsorbing portion can be reactivated more easily, so that the frequency of exchanging the adsorbing portion can be reduced.
Furthermore, it is possible to reduce the amount of ozone flowing directly downstream of the adsorption unit without contributing to decomposition at the adsorption unit. That is, since the decomposition contribution rate that ozone contributes to the decomposition of pollutants increases, the amount of ozone generated can be reduced. As a result, the amount of NOx generated as a by-product can be reduced, and the replacement frequency of the NOx filter or the like can be reduced. Moreover, since the trouble which adsorb | sucks ozone to a NOx filter and shortens the lifetime of a NOx filter can be avoided, the replacement frequency of a NOx filter can be decreased.

  The further characteristic structure of the decomposition apparatus which concerns on this invention exists in the point whose said ozone decomposition removal part is an ozone decomposition catalyst containing manganese dioxide.

  According to this feature configuration, by using an ozone decomposition catalyst containing manganese dioxide, it is possible to further improve the decomposition ability of pollutants by ozone, so that it does not contribute to decomposition in the adsorption unit and is directly downstream of the adsorption unit. The amount of ozone flowing out can be reduced. That is, since the decomposition contribution rate that ozone contributes to the decomposition of pollutants increases, the amount of ozone generated can be reduced. As a result, the amount of NOx generated as a by-product can be reduced, and the replacement frequency of the NOx filter or the like can be reduced. Moreover, since the trouble which adsorb | sucks ozone to a NOx filter and shortens the lifetime of a NOx filter can be avoided, the replacement frequency of a NOx filter can be decreased.

  A further characteristic configuration of the decomposition apparatus according to the present invention is that an air filter is provided on the upstream side of the ozone generation mechanism.

According to this characteristic configuration, the gas containing the pollutant can be filtered by the air filter to remove fine particles such as dust and dust, so that the ozone generation mechanism, the adsorption unit and the NOx treatment unit are contaminated with the fine particles. It is possible to prevent the ability from being lowered.
And, since the capacity of the suction part can be used without deteriorating due to contamination, it is not necessary to perform excessive design in anticipation of a decrease in the capacity of the suction part, the size of the suction part can be reduced, and the suction part Can be replaced less frequently. In addition, since the NOx filter can be used without deteriorating due to contamination, the replacement frequency of the NOx filter can be reduced.

  A further characteristic configuration of the decomposition apparatus according to the present invention includes a contaminant concentration detection unit that detects the concentration of the contaminant on the downstream side of the adsorption unit, and the detected concentration value of the contaminant concentration detection unit is a predetermined value. When the value is reached, the switching unit switches the flow state of the gas containing the pollutant from the adsorption decomposition state to the regeneration state.

According to this characteristic configuration, when the adsorbing portion is saturated with or near to the pollutant, the generation of ozone can be started and switched to the regeneration state to decompose the pollutant. It is possible to avoid continuing to leak downstream of the adsorption portion.
Here, if the generation of ozone is started before approaching saturation, the pollutant decomposition efficiency decreases because the concentration of the pollutant in the adsorption section is low. And the decomposition contribution rate which ozone contributes to decomposition | disassembly of a pollutant becomes low. Therefore, the amount of ozone generated with respect to the amount of contaminants to be processed is increased, and as a result, the amount of NOx generated as a by-product with respect to the amount of contaminants to be processed increases. However, according to this characteristic configuration, the adsorption unit can be configured to start generating ozone and decompose the pollutant after the adsorbed part is saturated or approaching saturation, thereby reducing the amount of NOx generated. , NOx filter replacement frequency can be minimized.

In order to achieve the above object, the operation method of the decomposition apparatus according to the present invention includes a blower mechanism for passing a gas containing a pollutant, an ozone generating mechanism for generating ozone by plasma, and an adsorption for adsorbing the pollutant. And a method of operating a decomposition apparatus including a NOx filter that removes NOx,
An adsorbing and decomposing step of adsorbing the pollutant in the adsorbing part by allowing the gas containing the pollutant to flow in the order of the ozone generating mechanism and the adsorbing part while stopping the ozone generating mechanism, While operating the ozone generation mechanism, the gas containing the pollutant flows in the order of the ozone generation mechanism, the adsorption unit, and the NOx filter, or the ozone generation mechanism, the NOx filter, and the adsorption unit in this order. Thus, the regeneration step of sequentially decomposing the contaminant adsorbed on the adsorption portion and removing NOx by the NOx filter is performed.

  According to this characteristic configuration, the decomposition apparatus includes an adsorption decomposition step of allowing a gas containing a pollutant to flow through the adsorption flow path in a state where the ozone generation mechanism is stopped, and a gas contained while operating the ozone generation mechanism. Since the regeneration process for passing through the regeneration flow path can be performed sequentially, the ozone generation mechanism need not be always activated but only activated in the regeneration state, and the generation amount of ozone and NOx can be reduced. It is possible to reduce the replacement frequency of the adsorption unit and the NOx filter.

  In the adsorptive decomposition process, the pollutant can be decomposed by temporarily adsorbing the pollutant to the adsorbing part by passing a gas containing the pollutant through the adsorbing part. Thereby, while it is set as the structure which can adsorb | suck a contaminant reliably in an adsorption | suction part, since gas is not allowed to flow through a NOx filter with a large pressure loss, the energy required for ventilation | gas_flowing can be decreased.

Next to the adsorption decomposition step, a regeneration step is performed. In the regeneration process, the ozone generation mechanism is operated to generate ozone, and the ozone is supplied to the adsorption unit together with the gas containing the pollutant. The pollutant adsorbed on the adsorption part can be decomposed by ozone. Further, in the regeneration step, NOx is generated as a by-product due to the operation of the ozone generation mechanism, but the NOx can be removed by a NOx filter.
Therefore, in the regeneration process, the contaminant adsorbed on the adsorption part can be decomposed and at the same time the ability to adsorb the contaminant in the adsorption part can be regenerated and the adsorption part can be used repeatedly. The replacement frequency of the parts can be reduced.
Further, since ozone can be supplied after increasing the concentration of the pollutant in the adsorption section, the decomposition efficiency of the pollutant by ozone is increased, and the amount of ozone necessary for the decomposition of the pollutant can be reduced. As a result, the amount of NOx generated as a by-product can be reduced, and the frequency of replacement of the NOx filter can be reduced while keeping the entire decomposition apparatus compact.

  Furthermore, in the regeneration process, when at least a part of the contaminant adsorbed on the adsorption part is decomposed and removed, the adsorption decomposition process is started again. As described above, the decomposition operation can be continuously performed by sequentially performing the adsorption decomposition step and the regeneration step.

The flowchart which shows the adsorption decomposition state of the decomposition | disassembly apparatus in 1st embodiment. The flowchart which shows the reproduction | regeneration state of the decomposition | disassembly apparatus in 1st embodiment. The schematic block diagram which shows the decomposition | disassembly apparatus in 2nd embodiment. Schematic configuration diagram showing a disassembling apparatus in the third embodiment Schematic configuration diagram showing a disassembling apparatus in the fourth embodiment The figure which shows the removal rate of the contaminant in Example 1. The figure which shows the removal rate of the contaminant in Example 2. The figure which shows the removal rate of the contaminant in Example 3.

Hereinafter, embodiments of a decomposition apparatus and an operation method thereof according to the present invention will be described with reference to the drawings.
[First embodiment]
As shown in FIGS. 1 and 2, the decomposition apparatus according to the first embodiment includes a fan 5 (an example of a blower mechanism) that allows a gas containing a contaminant to flow, and an ozone generation mechanism 2 that generates ozone by plasma. And an HEPA filter (an example of an air filter) 1 provided on the upstream side of the ozone generation mechanism 2 to remove (collect) particulates such as dust and dust, and provided on the downstream side of the ozone generation mechanism 2 An adsorption unit 3 that adsorbs contaminants, a NOx filter 6 that is provided downstream of the ozone generation mechanism 2 to remove NOx, and a control unit (not shown) that controls the operation of each component of the decomposition apparatus are provided. .
In the present embodiment, the HEPA filter 1, the ozone generation mechanism 2, and the adsorption unit 3 are installed in this order from the upstream side to the downstream side in the flow direction in which the gas containing the pollutant flows, and downstream of the adsorption unit 3. On the side, a damper (an example of a switching unit) 9 is installed.

The damper 9 receives a command from the control unit, and the NOx removal flow path 7 through which the gas flow that passes through the adsorption unit 3 and flows into the damper 9 flows in the order of the NOx filter 6 and the fan 5, and the NOx filter. The ventilation state is configured to be freely switchable between two states so as to communicate with either one of the bypass flow path 8 that ventilates the fan 5 without going through the fan 6.
Between the damper 9 and the fan 5, a NOx removal flow path 7 that communicates from the damper 9 via the NOx filter 6 to the fan 5, and a bypass path that bypasses the NOx filter 6 from the damper 9 and communicates with the fan 5. 8 are provided in parallel.
The NOx processing unit 4 includes a portion including a damper 9, a NOx filter 6, a NOx removal passage 7 communicating with the NOx filter 6 that removes NOx from the damper 9, and a bypass passage 8 that bypasses the NOx filter 6. deal with.

Therefore, a flow path through which the gas containing the pollutant flows in the order of the HEPA filter 1, the ozone generation mechanism 2, the adsorption unit 3, the damper 9, the bypass flow path 8, and the fan 5 is an adsorption flow path (not shown). Function as. In addition, a flow path through which the gas containing the pollutant flows in the order of the HEPA filter 1, the ozone generation mechanism 2, the adsorption unit 3, the damper 9, the NOx removal flow path 7, the NOx filter 6, and the fan 5 is a regeneration flow path. (Not shown). In addition, the gas containing the pollutant flowing into the HEPA filter 1 may be referred to as intake air 21 and the gas discharged from the fan 5 may be referred to as exhaust gas 22.
That is, the damper 9 receives the control from the control unit and stops the ozone generation mechanism 2 while allowing the gas containing the pollutant to flow through the adsorption flow path and adsorbs the pollutant in the adsorption unit 3. While the adsorption / decomposition state and the ozone generation mechanism 2 are operated, the gas containing the pollutant is passed through the regeneration channel to decompose the pollutant adsorbed on the adsorbing unit 3 and the NOx filter 6 It functions as a switching unit that can be switched to a playback state in which the image is removed.

A pollutant concentration sensor (an example of a pollutant concentration detection unit) 10 that detects the concentration of pollutants is provided between the adsorption unit 3 and the damper 9, and the detected pollutant concentration is used as a control unit. It is configured to output.
Further, a NOx concentration sensor 11 is provided between the damper 9 and the NOx filter 6 in the NOx removal flow path 7 and outputs the NOx concentration of the airflow flowing from the damper 9 into the NOx filter 6 to the control unit. It is configured as follows.

  Next, a description will be given of each component of the decomposition apparatus.

  An atmospheric pressure plasma apparatus (an example of a plasma generation apparatus) that generates plasma under atmospheric pressure as the ozone generation mechanism 2 is a creeping discharge type device that is formed by protecting a part of the surface of a conductive electrode with a dielectric, A device that induces corona discharge by forming one side of the counter electrode in a needle shape, or a device that generates plasma by applying an electric field between counter plate electrodes having a gap of the order of 10 to 100 μm can be employed. In these atmospheric pressure plasma devices, the discharge space is expanded by the size of the area of the opposing plate electrodes, and the atmospheric molecules efficiently ionize or cause electron transfer reactions by the streamer discharge generated randomly, and ozone, ions A large amount of active species such as radicals are generated. Further, plasma generation is possible from only about 1 kV even under atmospheric pressure, and the power supply and the entire plasma system can be reduced. Furthermore, when it uses as a discharge space passage process type, there exists an advantage which can take much flow volume of to-be-processed air.

The adsorption unit 3 includes an ozone decomposition catalyst (an example of an ozone decomposition catalyst unit) 3a inside a housing or the like, and the ozone decomposition catalyst 3a has a reversible adsorption principle and decomposes pollutants by circulation of ozone. In addition, it is possible to use a structure in which the adsorption capacity is regenerated and reactivated.
As the ozonolysis catalyst 3a, for example, a material containing, as a main component, a porous material such as activated carbon, zeolite or silica, or a substance having an affinity for a contaminant such as a transition metal compound is used.
Suitable transition metal oxides include, for example, one or a combination of manganese dioxide, nickel oxide, iron tetroxide, copper oxide, cobalt carbonate, nickel carbonate, and copper carbonate (copper-manganese and copper-chromium). Composite oxide catalyst). These materials have the ability to decompose ozone and adsorb pollutants.

In this embodiment, as the ozone decomposition catalyst 3a, an ozone decomposition catalyst in which a corrugated honeycomb structure made of aluminum foil is used as a base material and a manganese dioxide catalyst is supported and attached thereto is used.
This ozonolysis catalyst 3a is excellent in the physical adsorption characteristics of pollutants and the reactivation effect by ozone.
In the decomposition of ozone by manganese dioxide, the ozone decomposition catalyst 3a comes into contact with ozone to generate oxygen, generates active oxygen on the surface thereof, and the active oxygen further contacts with ozone to generate oxygen. It is considered to be a thing. From this, when it is considered that the contaminant adsorbed on the surface of the ozone decomposition catalyst 3a reacts with the active oxygen generated by the decomposition of ozone and decomposes, the catalytic effect of the ozone decomposition catalyst 3a can be explained.

The NOx filter 6 may be an adsorbent such as activated carbon, or may be decomposed or collected by a catalyst or chemical action, and any form can be used as long as it can adsorb or decompose NOx.
For example, in the case of using activated carbon, a honeycomb or corrugated activated carbon filter is suitable. For example, a so-called urea SCR system can be used as a catalyst or a chemical action. As the activated carbon filter, a filter in which activated carbon paper in which particulate activated carbon is formed in a honeycomb or corrugated shape and treated with a metal complex or an alkali metal salt can be used. As the laminated structure, a cell having about 200 cells / square inch or the like can be used. In addition, sodium carbonate, potassium carbonate or the like can be used as the additive agent as the alkali metal salt.

  As the ventilation mechanism, a publicly known configuration can be used as long as the gas containing the pollutant can be appropriately passed through the adsorption channel and the regeneration channel. In this embodiment, the fan 5 is used. Was used. In the case of a system with a large amount of airflow, a so-called blower may be used, or in an environment where quietness is required, or in applications where further downsizing is required, so-called ejectors, venturis, You may use the structure which generate | occur | produces ventilation force by an aerodynamic method like a ring nozzle.

  It should be noted that the device members of the disassembly device need only be in communication with each other in the order described, for example, the device members are in direct communication with each other, or are connected by flow paths such as so-called pipes, ducts, and circular tubes. May be. In other words, it is a concept that each device member and the like are communicated with each other as long as they communicate with each other by an appropriate method through which an airflow flows.

  Next, the operation method of the decomposition apparatus of this embodiment is demonstrated. The operation method is roughly divided into an adsorption decomposition process and a regeneration process.

[Adsorption decomposition process]
First, when the decomposition apparatus starts operation, as shown in FIG. 1, the control unit stops the operation of the ozone generation mechanism 2 and passes the damper 9 through the adsorption unit 3 and the gas flowing into the damper 9. The ventilation state is switched so that the flow communicates with the bypass flow path 8 that ventilates the fan 5 without passing through the NOx filter 6. That is, the flow of the gas 31 containing the pollutant is in an adsorptive decomposition state in which the HEPA filter 1, the ozone generation mechanism 2, the adsorption unit 3, the damper 9, the detour channel 8, and the fan 5 pass through the adsorption channel in this order. Thus, the ventilation state is switched to the adsorption decomposition state, and the adsorption decomposition step is executed.
FIG. 1 shows a flow of the decomposition apparatus in the adsorption decomposition state.

In this adsorptive decomposition step, the gas 31 containing the pollutant is filtered by the HEPA filter 1 to become a gas 32 containing the pollutant after filtration, and further led to the adsorbing unit 3 via the ozone generation mechanism 2. The pollutant is adsorbed by the ozone decomposition catalyst 3a of the adsorbing unit 3 to become a gas 33 in which the pollutant is decomposed.
In the adsorption / desorption process, the damper 9 communicates with the bypass flow path 8, and the gas 33 in which the pollutants are decomposed does not pass through the NOx filter 6 and passes through the fan 5 to the outside of the decomposition apparatus as exhaust 22. Exhausted.

[Contaminant concentration determination]
In the adsorption / decomposition process, the determination of switching from the adsorption / decomposition process to the regeneration process described later is made based on the concentration of the contaminant detected by the contaminant concentration sensor 10 provided downstream of the adsorption unit 3. Specifically, for example, the control unit compares the concentration of the contaminant in the gas 33 obtained by decomposing the contaminant detected by the contaminant concentration sensor 10 with a predetermined value set in advance, and the detected value is When the ozone decomposition catalyst 3a reaches a predetermined value, it is determined that it is the timing of switching from the adsorption decomposition process to the regeneration process, assuming that the ozone decomposition catalyst 3a is in a state of being broken through by the contaminant (the state in which the contaminant is no longer adsorbed). .
Then, when it is determined that it is the switching timing, the control unit is configured to switch to the regeneration process and execute the regeneration process.

  The duration of the adsorption / decomposition process (time from the adsorption / decomposition process to the regeneration process) may be configured to end at a preset time without using the detection result of the pollutant concentration sensor 10. For example, the duration of the adsorption / desorption process may be set to a preset time T1, and when the time T1 has elapsed, the adsorption / decomposition process may be terminated and the regeneration process may be started.

[Regeneration process]
When switching to the regeneration process, as shown in FIG. 2, the control unit operates the ozone generation mechanism 2, and the flow of the gas that has flowed into the damper 9 through the adsorption unit 3 through the adsorption unit 3 is converted into a NOx filter. 6, the ventilation state is switched so as to communicate with the NOx removal flow path 7 through which the fan 5 is ventilated. That is, the gas flow 31 containing the pollutant flows through the regeneration flow path in the order of the HEPA filter 1, the ozone generation mechanism 2, the adsorption unit 3, the damper 9, the NOx filter 6 in the NOx removal flow path 7, and the fan 5. The ventilation state is switched to the reproduction state so as to enter the reproduction state, and the reproduction step is executed. When switching to the regeneration process, the ozone generation mechanism 2 operates after the damper 9 communicates with the NOx removal flow path 7 so that the NOx generated from the ozone generation mechanism 2 does not flow to the bypass flow path 8 via the damper 9. It is preferable to do so.
FIG. 2 shows a flow of the disassembling apparatus in the reproduction state.

In this regeneration process, the gas 31 containing contaminants is filtered by the HEPA filter 1 to become a gas 32 containing contaminants after filtration, and further led to the adsorption unit 3 through the ozone generation mechanism 2.
At this time, since the ozone generating mechanism 2 is in an operating state, ozone 23 and NOx are generated, and the gas 32 containing the pollutant after the filtration passes through the ozone generating mechanism 2 with the gas containing the pollutant, ozone and NOx. To the adsorbing unit 3.

  In the adsorbing unit 3, ozone and pollutants adsorbed on the ozone decomposition catalyst 3a directly react with each other to decompose them (reaction in which ozone oxidizes and decomposes pollutants), ozone and pollution adsorbed on the ozone decomposition catalyst 3a. Reactions in which the substance reacts with the catalytic action of the ozone decomposition catalyst 3a, each of which decomposes (reaction in which ozone oxidizes and decomposes the pollutant), and reaction in which ozone decomposes by the catalytic action of the ozone decomposition catalyst 3a The reaction (decomposition to oxygen) occurs simultaneously, and both pollutants and ozone are decomposed and removed. The gas containing the pollutant and the mixed gas 34 of ozone and NOx become the gas 35 containing NOx.

Further, in the regeneration process, the gas 35 containing NOx that has passed through the ozone generating mechanism 2 and further passed through the adsorption section 3 is guided to the NOx filter 6 of the NOx removal flow path 7.
The NOx of the gas 35 containing NOx is removed by the NOx filter 6, and the purified gas 36 is exhausted as exhaust 22 from the decomposition apparatus.
That is, the gas containing the pollutant and the mixed gas 34 of ozone and NOx flowing through the ozone generating mechanism 2 become the gas 35 containing NOx through the adsorbing portion 3, and further purified through the NOx filter 6. The gas 36 is exhausted as exhaust 22 from the decomposition apparatus.

  In the present embodiment, the duration of the regeneration process is configured to end at a preset time. For example, the pollutant adsorbed on the ozone decomposition catalyst 3a of the adsorbing unit 3 is set to a predetermined time during which the pollutant can be decomposed to a predetermined extent by the ozone generated by the ozone generation mechanism 2.

  Here, in this embodiment, in the adsorption decomposition process and the regeneration process, the operation state of the fan 5 is maintained at a constant output state, but the regeneration process (regeneration) is performed more than the adsorption decomposition process (adsorption decomposition state). In the state), since the resistance of the flow path of the air flow of the decomposition apparatus is increased, the air flow rate is reduced in a state where the output of the ventilation mechanism is not lowered. By changing the output of the fan 5 by changing the frequency of the inverter, or by adjusting the pressure loss of the flow path by separately providing a mechanism for increasing the resistance of the flow path (for example, an opening adjusting mechanism such as a damper). In the regeneration step (regeneration state), the flow rate of the gas containing the pollutant flowing through the adsorption unit 3 can be reduced as compared with the adsorption decomposition step (adsorption decomposition state).

  As described above, the cycle from the adsorption decomposition step to the regeneration step is set as one cycle, and the decomposition operation can be continuously performed by repeating this cycle.

In the above description, when the regeneration process is completed, the process may be shifted immediately to the adsorption / decomposition process. However, a switching process may be provided when switching from the regeneration process to the adsorption / decomposition process.
In other words, when the pollutant adsorbed on the ozone decomposition catalyst 3a is decomposed and removed in the regeneration process, the ozone generation mechanism 2 is temporarily stopped, and after the predetermined time has elapsed after the stop, the adsorption decomposition process is restarted. Thus, after the ozone generation mechanism 2 is stopped in the regeneration process, a predetermined time from the start of the adsorption decomposition process becomes the switching process.
In other words, immediately after the ozone generation mechanism 2 stops, unremoved NOx remains in the flow path between the ozone generation mechanism 2 and the NOx treatment unit 4. Therefore, in order to remove the residual NOx, the timing at which the damper 9 is again communicated with the bypass flow path 8 is set to be after a predetermined time T2 until the residual NOx is removed by the NOx filter 6. .
Thus, by providing the switching step, it is possible to configure so that residual NOx generated from the ozone generation mechanism 2 does not flow through the bypass channel 8 via the damper 9.

  Further, instead of setting the predetermined time, as shown in FIG. 2, the NOx concentration sensor 11 provided as the NOx concentration detecting means in the NOx removal flow path 7 detects the NOx concentration of the gas 35 containing NOx. You can also Specifically, when the detected concentration of NOx becomes smaller than a predetermined value, the switching step can be switched to the adsorption decomposition step, or the regeneration step can be switched to the adsorption decomposition step.

  Therefore, it was possible to obtain a decomposition apparatus and an operation method thereof that can reduce the replacement frequency of the ozone decomposition catalyst 3a and the NOx filter 6 and can reduce the running cost.

[Second Embodiment]
Next, a second embodiment of the decomposition apparatus of the present invention will be described. This embodiment has basically the same configuration as the first embodiment, but differs from the first embodiment in that the position of the fan 5 is changed. As shown in FIG. 3, in the second embodiment, the fan 5 is installed downstream of the adsorption unit 3 and upstream of the NOx processing unit 4. The schematic block diagram of the decomposition | disassembly apparatus in 2nd embodiment is shown in FIG.
In addition, in 2nd embodiment, the adsorption | suction flow path is the adsorption | suction part 3 in which the gas containing a pollutant is provided in the downstream of the HEPA filter 1, the ozone generation mechanism 2, and the ozone generation mechanism 2, The fan 5, the damper 9, and the bypass flow path 8 are configured as flow paths.
Similarly, the regeneration channel is a channel in which a pollutant-containing gas flows in the order of the HEPA filter 1, the ozone generation mechanism 2, the adsorption unit 3, the fan 5, the damper 9, and the NOx filter 6 in the NOx removal channel 7. Composed.
Also in the decomposition apparatus having this configuration, a good pollutant decomposition effect can be obtained by the same operation method as in the first embodiment.

[Third embodiment]
Next, a third embodiment of the decomposition apparatus of the present invention will be described. This embodiment is also basically the same configuration as the first and second embodiments, but is an embodiment in which the order of some members and processes is changed compared to the first and second embodiments. .
Specifically, as shown in FIG. 4, the third embodiment is configured such that the NOx treatment unit 4 is provided downstream of the ozone generation mechanism 2 and the adsorption unit 3 is further provided downstream thereof.
Therefore, in the third embodiment, the adsorption flow path is a flow path in which the gas containing the contaminant flows in the order of the HEPA filter 1, the ozone generation mechanism 2, the damper 9, the bypass flow path 8, the fan 5, and the adsorption unit 3. Composed.
Similarly, the regeneration channel is a channel in which a pollutant-containing gas flows in the order of the HEPA filter 1, the ozone generation mechanism 2, the damper 9, the NOx filter 6 of the NOx removal channel 7, the fan 5, and the adsorption unit 3. Composed.

  Also in the decomposition apparatus having this configuration, a favorable pollutant decomposition effect can be obtained by the same operation method as in the first and second embodiments.

[Fourth embodiment]
Next, a fourth embodiment of the decomposition apparatus of the present invention will be described.
As shown in FIG. 5, the fourth embodiment corresponds to a configuration in which the ozone generation mechanism 2 is moved onto the NOx removal flow path 7 between the damper 9 and the NOx filter 6 in the third embodiment.
Here, in the decomposition apparatus, the ozone generation mechanism 2 is not operating in the adsorption decomposition state. However, since the ozone generation mechanism 2 also has a certain pressure loss, when the ozone generation mechanism 2 is stopped, if the ozone generation mechanism 2 is vented, energy corresponding to the pressure loss and the amount of ventilation is consumed. Therefore, in the fourth embodiment, in order to suppress energy consumption due to pressure loss when ventilating the ozone generation mechanism 2, the ozone generation mechanism 2 is bypassed together with the NOx filter 6 in the adsorption decomposition process in which the adsorption decomposition state is performed. The detour flow path 8 is configured.

That is, the fourth embodiment includes the damper 9, the ozone generation mechanism 2, the NOx filter 6, the NOx removal channel 7, and the bypass channel 8 as the NOx processing unit 4. The adsorption unit 3 is provided downstream of the NOx processing unit 4.
Therefore, in the fourth embodiment, the adsorption channel is configured as a channel in which a gas containing a contaminant flows in the order of the HEPA filter 1, the damper 9, the bypass channel 8, the fan 5, and the adsorption unit 3.
Similarly, the regeneration channel is a channel in which a pollutant-containing gas flows in the order of the HEPA filter 1, the damper 9, the ozone generation mechanism 2 in the NOx removal channel 7, the NOx filter 6, the fan 5, and the adsorption unit 3. Composed.

  In the fourth embodiment, the fan 5 may be provided downstream of the ozone generation mechanism 2 and upstream of the NOx treatment unit 4, or downstream of the HEPA filter 1 and of the ozone generation mechanism 2. It may be provided on the upstream side.

Also in the decomposition apparatus of this structure, a favorable pollutant decomposition effect can be obtained by the same operation method as in the first to third embodiments.
In addition, compared with 1st-3rd embodiment, since 4th embodiment does not flow the ozone generation mechanism 2 in an adsorption decomposition process, the pressure loss of the whole decomposition | disassembly apparatus in an adsorption decomposition state is made still smaller. can do. On the other hand, in the regeneration state, as in the first to third embodiments, a regeneration flow path is formed through which gas flows through the adsorption unit and the NOx filter, and the adsorption unit as in the first to third embodiments. 3 can be played.

[Other Embodiments]
In the above embodiment, a representative example of the structure of the disassembling apparatus has been shown. However, in the present invention, for example, the following modifications are possible.

  Although the example using the HEPA filter 1 as an air filter has been described in the above embodiment, the air filter may be any filter that can prevent particulate contamination in each part inside the decomposition apparatus. For example, a medium performance filter or the like can be used. . In addition, not only the contamination inside the decomposing apparatus but also the purification of the space where the decomposing substances are decomposed by the decomposing apparatus, a ULPA filter or the like having higher purification performance may be used. In addition, when the gas containing pollutants contains a relatively large amount of contaminating fine particles, a rough filter such as a rough filter or a medium performance filter is installed upstream of a filter having a relatively high purification capacity such as a HEPA filter. However, the filter performance may be maintained for a long time.

If the installation position of the fan 5 as a ventilation mechanism in the said embodiment is the installation which can ventilate, it can install in an appropriate position.
For example, the fan 5 may be installed at any position on the intake (upstream) side or the exhaust (downstream) side of the decomposition apparatus. However, in order to avoid the risk of air leakage from a joint such as a pipe of the decomposition apparatus, it is more preferable to install on the exhaust side.

  Although the example which uses the damper 9 was shown as a switching part in the said embodiment, the switching part should just be able to switch the flow path of airflow, for example, what is called valves, a three-way valve, and others well-known Can be used.

In the above embodiment, one type of ozone decomposition catalyst 3a is provided in the adsorption unit 3, but two or more types of adsorbents may be used in the adsorption unit 3. As a case where the adsorption unit includes an ozone decomposition / removal unit, for example, an ozone decomposition catalyst and another adsorbent having a larger amount of adsorbing contaminants than the ozone decomposition catalyst may be used at the same time. For example, the adsorbing portion is configured by mixing another adsorbent with a larger amount of contaminant adsorbed than the ozone decomposing catalyst into a matrix or a laminated structure.
If comprised in this way, while the adsorption time in an adsorption decomposition process can be set long and the density | concentration of the contaminant which exists around an ozone decomposition catalyst can be made higher, ozone contributes to decomposition | disassembly of a contaminant. The decomposition contribution rate is increased, and the amount of ozone generated can be reduced. As a result, the amount of NOx generated as a byproduct can be reduced, and the frequency of replacement of the NOx filter can be reduced while keeping the entire decomposition apparatus compact.

  In the above embodiment, in the regeneration step, an example is shown in which the pollutant adsorbed on the ozone decomposition catalyst that is the adsorbing portion is reactivated by decomposing with ozone and the ozone decomposition catalyst. A method of desorbing contaminants by heating the part may be used. In this case, for example, the adsorption unit 3 has a first adsorption unit composed of the ozone decomposition catalyst 3 a on the downstream side of the adsorption unit 3, and the amount of contaminant adsorbed on the upstream side of the adsorption unit 3 than the ozone decomposition catalyst 3 a. It is set as the structure which arranges the 2nd adsorption | suction part comprised with many other adsorbents. As the regeneration step, for example, a method can be used in which the second adsorbing part is heated and the pollutant is desorbed by the second adsorbing part and the pollutant is continuously ozone-decomposed by the second adsorbing part.

[Example 1]
An evaluation apparatus simulating the decomposition apparatus showing the first embodiment was made as a prototype, and a decomposition test was performed by changing the operation time of the regeneration process under the following apparatus configuration conditions and operation conditions. In this example, a total of 2.5 cycles of operations from the adsorption decomposition process to the regeneration process (one cycle) and again to the adsorption decomposition process are performed.
[Flow path configuration of evaluation device]
As a configuration simulating the adsorption flow path shown in the description of the first embodiment, a flow path that circulates in the order of the ozone generation mechanism by plasma, the adsorption section, and the fan was formed and used for the experiment of the adsorption decomposition process. In addition, as a configuration simulating the regeneration flow path, a flow path through which the ozone generation mechanism, the adsorption unit, the NOx filter, and the fan flow was formed in this order, and used for aeration conditions in the regeneration process. In this prototype, the adsorption channel and the regeneration channel were switched by attaching and removing the NOx filter. The ozone generation mechanism is stopped in the adsorption decomposition process.

[Equipment configuration conditions for evaluation equipment]
Ozone generation amount of the ozone generation mechanism: 180 mg / h
Adsorption part: Consists of ozone decomposition catalyst Ozone decomposition catalyst: Manganese dioxide-based honeycomb catalyst filter (trade name: Kataclean ALC500, manufactured by Nippon Nihon Feather Core Co., Ltd., structure: height 1 mm, pitch 2.4 mm, number of cells 540 Pieces / square inch)
NOx filter: Filter in which activated carbon paper made of corrugated particulate activated carbon and treated with sodium carbonate and potassium carbonate is laminated (the number of cells in the laminated structure is 200 cells / square inch)
Ozone decomposition catalyst inlet dimensions: vertical and horizontal dimensions = 10 cm x 10 cm
NOx filter inlet dimensions: vertical and horizontal dimensions = 10 cm x 10 cm
Contaminant concentration sensor: Gastec detector formaldehyde 91L

[Aeration conditions of adsorption decomposition process]
Gas containing pollutant: Continuous ventilation of formaldehyde-containing gas at a concentration of 6 ppm as pollutant Aeration condition to the ozone decomposition catalyst: Surface wind speed 1.4 m / s (pressure loss during ventilation: about 140 Pa)

[Conditions for completion of adsorption decomposition process]
The adsorbing member broke through with formaldehyde

[Aeration conditions in the regeneration process]
Gas containing pollutant: Continuous ventilation of formaldehyde-containing gas at a concentration of 6 ppm Aeration condition to the ozonolysis catalyst: Surface wind speed 0.1 m / s (pressure loss during ventilation: about 5 Pa)
Ventilation conditions for NOx filter: Surface wind speed 0.1 m / s (pressure loss during ventilation: about 5 Pa)
In addition, since the pressure loss at the time of ventilation | gas_flowing of a NOx filter was about 135 Pa when the ventilation | gas_flowing condition to a NOx filter was 1.4 m / s, the surface wind speed is set slower than an adsorption decomposition process in a regeneration process. Thus, it can be said that the pressure loss of the NOx filter could be reduced to about 1/27.

[Reproduction process time]
1st cycle: 6 minutes 2nd cycle: 30 minutes

  FIG. 6 shows the contaminant removal rate of the operation performed as described above. In FIG. 6, the horizontal axis represents the operation time, and the vertical axis represents the removal efficiency of the pollutant (here, formaldehyde).

  As shown in FIG. 6, in the configuration of the present embodiment, when the contaminant is adsorbed in the adsorption / decomposition process and the adsorption is saturated, if the contaminant is decomposed in the regeneration process, the adsorbing portion is reactivated, and the contaminant again It can be seen that adsorption can be performed. Moreover, it turns out that switching from the adsorption decomposition process to the regeneration process can be repeated a plurality of times.

[Example 2]
With the evaluation apparatus and the evaluation method shown in Example 1, the operating conditions and the like were partially changed, and switching from the adsorption decomposition process to the regeneration process was performed for 2.5 cycles (the regeneration process was performed twice).

[Equipment configuration conditions for evaluation equipment]
Ozone generation amount of ozone generation mechanism: 150 mg / h to 162 mg / h
Adsorption part: composed of an ozone decomposition catalyst Ozone decomposition catalyst: the same as in Example 1 NOx filter: the same as in Example 1 Ozone decomposition catalyst inlet dimensions: vertical and horizontal dimensions = 10 cm × 10 cm
NOx filter inlet dimensions: vertical and horizontal dimensions = 10 cm x 10 cm
Contaminant concentration sensor: Gastec detector formaldehyde 91L

[Aeration conditions of adsorption decomposition process]
Gas containing pollutant: Continuous ventilation of formaldehyde-containing gas at a concentration of 1.5 ppm as pollutant Aeration condition to ozone decomposition catalyst: Surface wind speed 1.4 m / s (pressure loss during ventilation: about 140 Pa)

[Conditions for completion of adsorption decomposition process]
The adsorbing member broke through with formaldehyde

[Aeration conditions in the regeneration process]
Gas containing pollutants: Continuous ventilation of formaldehyde-containing gas at a concentration of 1.5 ppm Aeration condition to the ozonolysis catalyst: Surface wind speed 0.2 m / s (pressure loss during ventilation: about 10 Pa)
Ventilation conditions for NOx filter: Surface wind speed 0.2 m / s (pressure loss during ventilation: approx. 15 Pa)
In addition, since the pressure loss at the time of ventilation | gas_flowing of a NOx filter was about 135 Pa when the ventilation | gas_flowing condition to a NOx filter was 1.4 m / s, the surface wind speed is set slower than an adsorption decomposition process in a regeneration process. Thus, it can be said that the pressure loss of the NOx filter could be reduced to about 1/9.

[Reproduction process time]
1st cycle: 5 minutes 2nd cycle: 10 minutes

  FIG. 7 shows the contaminant removal rate of the operation performed as described above. In FIG. 7, the horizontal axis represents the operation time, and the vertical axis represents the removal efficiency of the pollutant (formaldehyde in this case).

  As shown in FIG. 7, even if the concentration of the pollutant becomes dilute as in this embodiment, or the surface wind speed of the regeneration process or the process time of the regeneration process is changed, the adsorption decomposition process is performed as in the first embodiment. It can be seen that switching to the regeneration process can be repeated several times to maintain the performance of the decomposition apparatus.

Example 3
With the evaluation apparatus and the evaluation method shown in Example 1, the operating conditions and the like were partially changed, and switching from the adsorption decomposition process to the regeneration process was performed for 1.5 cycles (one regeneration process).

[Device configuration conditions]
Ozone generation amount of the ozone generation mechanism: 162 mg / h
Adsorption part: composed of an ozone decomposition catalyst Ozone decomposition catalyst: the same as in Example 1 NOx filter: the same as in Example 1 Ozone decomposition catalyst inlet dimensions: vertical and horizontal dimensions = 10 cm × 10 cm
NOx filter inlet dimensions: vertical and horizontal dimensions = 10 cm x 10 cm
Contaminant concentration sensor: Gastec detector formaldehyde 91L

[Aeration conditions of adsorption decomposition process]
Gas containing pollutant: Continuous ventilation of formaldehyde-containing gas at a concentration of 1.0 ppm as pollutant Conditions for ventilation to the ozone decomposition catalyst: Surface wind speed of 1.4 m / s

[Conditions for completion of adsorption decomposition process]
The adsorbing member broke through with formaldehyde

[Aeration conditions in the regeneration process]
Gas containing pollutants: Continuous ventilation of formaldehyde-containing gas at a concentration of 1.5 ppm Aeration condition to the ozone decomposition catalyst: Surface wind speed 0.2 m / s
Ventilation condition for NOx filter: Surface wind speed 0.2m / s
[Reproduction process time]
1st cycle: 10 minutes

  FIG. 8 shows the contaminant removal rate under the conditions implemented as described above. In FIG. 8, the horizontal axis represents the operation time, and the vertical axis represents the removal efficiency of pollutants (here, formaldehyde).

  As shown in FIG. 8, it can be understood that the adsorption, decomposition, and regeneration performance of the decomposition apparatus can be maintained as in Examples 1 and 2 even when the concentration of the contaminant is further diluted as in this example.

Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.
Moreover, although the example which decomposes | disassembles formaldehyde was illustrated as a contaminant which becomes a problem in an indoor environment in the said embodiment, it produces | generates by decomposing | disassembling volatile organic chemical substances, such as an acetic acid and an acetaldehyde, for example, an organic substance as another contaminant. It can also be used for decomposition of ammonia and the like.

  INDUSTRIAL APPLICABILITY The present invention can be usefully used as a decomposition apparatus that can reduce the replacement cost of the adsorbing unit and the NOx filter and that can suppress the running cost, and the operation method thereof.

1 HEPA filter (air filter)
2 Ozone generation mechanism 3 Adsorbing part 3a Ozone decomposition catalyst 5 Fan (venting mechanism)
6 NOx filter 9 Damper (switching part)
10 Pollutant concentration sensor (pollutant concentration detector)

Claims (8)

Disassembly comprising a blowing mechanism for passing a gas containing pollutants, an ozone generating mechanism for generating ozone by plasma, and an adsorbing portion provided downstream of the ozone generating mechanism for adsorbing the pollutants A device,
A NOx filter provided on the downstream side of the ozone generation mechanism to remove NOx;
An adsorption flow path for allowing the gas containing the contaminant to flow through the adsorption portion;
A regeneration flow path for allowing the gas containing the pollutant to flow in the order of the adsorption unit and the NOx filter, or in the order of the NOx filter and the adsorption unit;
While stopping the ozone generation mechanism, the gas containing the pollutant is passed through the adsorption flow path, and the adsorption decomposition state in which the pollutant is adsorbed by the adsorption unit, and the ozone generation mechanism is operated. However, the gas containing the pollutant is allowed to flow through the regeneration flow path to decompose the pollutant adsorbed on the adsorbing portion and switch to a regeneration state in which NOx is removed by the NOx filter. Disassembling apparatus equipped with a switching unit.   The adsorption channel is configured to flow a gas containing the pollutant in the order of the ozone generation mechanism and the adsorption unit, and the regeneration channel is configured to generate the ozone containing the gas containing the pollutant. The decomposition apparatus according to claim 1, wherein the mechanism, the adsorption unit, the NOx filter, or the ozone generation mechanism, the NOx filter, and the adsorption unit are passed in this order.   In the regeneration state in which the ozone generation mechanism is operating, the flow rate of the gas containing the pollutant flowing through the adsorption unit is less than in the adsorption decomposition state in which the ozone generation mechanism is stopped. The decomposition apparatus according to claim 1 or 2, wherein the decomposition apparatus is configured.   The said adsorption | suction part is a decomposition | disassembly apparatus as described in any one of Claims 1-3 containing the ozonolysis removal part which decomposes | disassembles ozone with the said contaminant.   The decomposition apparatus according to claim 4, wherein the ozone decomposition removal unit is an ozone decomposition catalyst containing manganese dioxide.   The decomposition apparatus as described in any one of Claims 1-5 provided with an air filter in the upstream of the said ozone generation mechanism. On the downstream side of the adsorption unit, a contaminant concentration detection unit for detecting the concentration of the contaminant is provided,
The switching unit switches the flow state of the gas containing the contaminant from the adsorption decomposition state to the regeneration state when the detected concentration value of the contaminant concentration detection unit reaches a predetermined value. The disassembling apparatus according to any one of the above. Method of operating a decomposing apparatus comprising an air blowing mechanism for passing a gas containing pollutants, an ozone generating mechanism for generating ozone by plasma, an adsorption part for adsorbing the pollutants, and an NOx filter for removing NOx Because
Adsorbing and decomposing step of adsorbing the pollutant in the adsorbing part by passing the gas containing the pollutant in the order of the ozone generating mechanism and the adsorbing part while stopping the ozone generating mechanism;
While operating the ozone generation mechanism, gas containing the pollutant is passed in the order of the ozone generation mechanism, the adsorption unit, and the NOx filter, or the ozone generation mechanism, the NOx filter, and the adsorption unit in this order. A decomposing apparatus operating method that sequentially executes a regeneration step of decomposing the pollutant adsorbed by the adsorbing section and removing NOx by the NOx filter.

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