JP2004321309A - Apparatus and method for deodorization - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization apparatus and a method for deodorization in which energy saving can be achieved. <P>SOLUTION: An odorous material in gas is stayed and accumulated in an electrical insulating odorous material staying means 30. And, when voltage is applied between electrodes 21 and 22, an electric field acts on the odorous material held in the odorous material staying means 30 and the odorous material is decomposed. Thus, when the is applied after the odorous material is stayed and accumulated enough in the odorous material staying means 30, the frequency of discharge can be reduced relative to the case where there is no odorous material staying means 30 and the odorous material is not accumulated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a deodorizing device that decomposes odor substances by applying a predetermined electric field to an electric insulator in which odor substances are retained.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a deodorizing device has been known in which a voltage is applied between a pair of electrodes to generate an electric field, and air containing an odorant is introduced between the pair of electrodes to decompose the odorant.
[0003]
[Patent Document 1]
JP-A-2001-190652
[Problems to be solved by the invention]
However, in air containing odorants, the concentration of odorants is often very low. Therefore, the amount of air containing the odorant to be treated is larger than the amount of the odorant to be decomposed, and the number of times of voltage application tends to increase. Therefore, a deodorizing device that can save more energy is desired.
[0005]
The present invention has been made in view of the above problems, and has as its object to provide a deodorizing apparatus and a deodorizing method that can save energy.
[0006]
[Means for Solving the Problems]
The deodorizing device according to the present invention is provided with a pair of electrodes facing each other, and is provided between the pair of electrodes, is an electrical insulator, and selectively contacts the fluid containing the odor material to selectively remove the odor material in the fluid. An odorant staying means for staying, and a voltage applying device for applying a voltage between the pair of electrodes are provided.
[0007]
According to the deodorizing device of the present invention, the odor substance in the fluid is retained and accumulated in the insulating odor substance retaining means. Then, when a voltage is applied between the electrodes, an electric field acts on the odor substance accumulated in the odor substance retaining means, and the odor substance is decomposed. Therefore, it is sufficient to apply the voltage after the odor substance is accumulated in the odor substance retaining means and sufficiently accumulated, so that the number of times of discharge can be reduced as compared with the case where the odor substance is not accumulated without the odor substance retaining means. For this reason, energy can be saved.
[0008]
Here, it is preferable that the odorant staying means selectively adsorbs the odorant in the fluid when the odorant stays in contact with the fluid containing the odorant.
[0009]
According to this, since the odor substance is selectively adsorbed by the odor substance retaining means as compared with other fluid components, the odor substance can be appropriately retained and accumulated.
[0010]
Here, as the odor substance retention means, a capillary tube made of porous ceramic or glass can be exemplified. By using these as the odor substance retention means, odor substances such as aldehydes and fatty acids contained in the air are selectively retained on the inner wall surface between the pores of the porous ceramic and the capillaries by the action of adsorption or the like, which is preferable. Can be accumulated.
[0011]
Further, it is preferable that the voltage applying device applies a unipolar pulse voltage between the pair of electrodes.
[0012]
According to this, the intensity of the electric field between the pair of electrodes can be increased, so that the odorous substance can be more appropriately decomposed.
[0013]
Further, it is preferable that the voltage application device applies a voltage between the pair of electrodes so that the intensity of the electric field between the pair of electrodes is 0.8 kV / mm or more and 3.0 kV / mm or less.
[0014]
When the intensity of the electric field between the pair of electrodes is lower than 0.8 kV / mm, the decomposition of the odorant tends to be difficult to occur. On the other hand, when the strength of the electric field between the pair of electrodes exceeds 3.0 kV / mm, insulation is easily broken, the effective electric field between the electrodes is reduced, and the decomposition efficiency and the energy efficiency tend to be reduced.
[0015]
Further, an odor sensor for acquiring information on the concentration of the odor substance contained in the fluid discharged from the odor substance retaining means, and a timing of voltage application by the voltage application device are controlled based on the information on the concentration of the odor substance. And an application timing control device.
[0016]
According to this, after the odorous substance in the fluid is retained in the odorant retaining means to the maximum capacity that can be retained, the odorant can no longer be retained and the odorous substance is discharged from the odorant retaining means. Can be detected by the odor sensor. Further, when this is detected, a voltage is applied between the pair of electrodes to decompose the odor substance held by the odor substance retaining means. Thereby, the timing of voltage application can be optimized according to the amount of the odorous substance in the fluid, and further energy saving can be achieved.
[0017]
Further, the fluid containing the odorant can be caused to flow in a predetermined direction, and each of the pair of electrodes can be arranged in parallel with the flow of the fluid.
[0018]
According to this, it is possible to change the length of the odor substance retaining means in the flow direction without changing the thickness between the pair of electrodes, thereby changing the maximum value of the capacity that can retain the odor substance, and changing the deodorizing condition. It is easy to change the configuration of the deodorizing device according to the requirements.
[0019]
Further, a second odor substance retention means is provided on the opposite side to the odor substance retention means with one of the pair of electrodes interposed therebetween, and the second odor substance retention means is sandwiched between the two electrodes. A second electrode electrically connected to the other of the pair of electrodes may be provided on the side opposite to the one.
[0020]
According to this, the diameter of the pipe in the width direction perpendicular to the flow of the fluid can be made sufficiently larger than the distance between the electrodes. Thus, the distance between the electrodes is maintained at, for example, about 10 mm, and an electric field of about 1.0 kV / mm is generated by applying a voltage of about 10 kV, while a plurality of combinations of the odorant retention means and the electrodes are arranged in the width direction. Providing such a structure enables suitable deodorization even in a wide pipe. In addition, when the diameter of the conduit is maintained, the distance between the electrodes is reduced, so that the voltage applied to the electrodes can be reduced.
[0021]
Further, the fluid containing the odorant may be caused to flow in a predetermined direction, and each of the pair of electrodes may be arranged in a direction intersecting the flow of the fluid and may have a mesh shape.
[0022]
According to this, even when the diameter of the conduit in the width direction perpendicular to the flow of the fluid is increased, the distance between the mesh-shaped electrodes can be maintained, and a large-volume deodorizing apparatus can be easily realized.
[0023]
In addition, one of the pair of electrodes may have a rod shape, and the other of the electrodes may have a cylindrical shape surrounding the one electrode.
[0024]
According to this, since it has the cylindrical electrode and the rod-shaped electrode, the odor substance retention means and the pair of electrodes can be disposed in the circular pipe, by effectively utilizing the internal space. .
[0025]
The deodorizing method according to the present invention includes a step of bringing a fluid containing an odorant into contact with an electrical insulator to selectively retain the odorant in the fluid on the electrical insulator, and an electrical insulator containing the odorant. Applying a predetermined electric field to the
[0026]
According to the deodorizing method of the present invention, the odorous substance in the fluid is retained and accumulated in the electric insulator. Then, when a voltage is applied to the electrode sandwiching the electric insulator, an electric field acts on the odor substance retained in the electric insulator, and the odor substance is decomposed. For this reason, the voltage may be applied after the odor substance is accumulated in the electric insulator and sufficiently accumulated, so that the number of times of discharge is smaller than in the case where the odor substance is not accumulated without accumulating the odor in the electric insulator. Can be reduced. For this reason, energy can be saved.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a deodorizing device according to the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements have the same reference characters allotted, and overlapping description will be omitted.
[0028]
(First embodiment)
FIG. 1 is a schematic diagram of a deodorizing device according to the first embodiment. The deodorizing apparatus 100 according to the present embodiment is for deodorizing air to be treated containing an odorous substance, which is supplied via the pump 1 and flows in the pipeline 10 rightward in the drawing. Here, the odor substance is a substance that makes a human feel an odor, such as various fatty acids such as valeric acid, aldehyde, ammonia, H ₂ S, and SO ₂ . The air to be treated contains, for example, 1 ppb to 1 ppm of these odorous substances.
[0029]
The deodorizing apparatus 100 includes an electrode 21 and an electrode 22, a porous insulator (odor substance retaining means) 30 that is interposed between the electrode 21 and the electrode 22, and comes into contact with air to be processed flowing in the pipeline 10. A voltage application device 40 for applying a voltage between the electrode 21 and the electrode 22, an application timing control device 50 for controlling the timing of voltage application by the voltage application device 40, and a porous insulator 30 after contacting the porous insulator 30. An odor sensor 60 for detecting the concentration of odorous substances in the treated air discharged from the exhaust gas 30.
[0030]
The electrode 21 and the electrode 22 are each a conductor such as a metal having a flat plate shape, are arranged in the pipe 10 in parallel with the flow direction of the air to be processed, and face each other.
[0031]
The voltage application device 40 has a terminal 40a and a terminal 40b, and generates a pulsed DC voltage between the terminals 40a and 40b. The electrode 21 is electrically connected to a terminal 40a of the voltage application device 40 via a line L1, and the electrode 22 is electrically connected to a terminal 40b of the voltage application device 40 via a line L2. The voltage application device 40 generates a pulsed DC voltage between the terminals 40a and 40b, thereby applying a predetermined pulse voltage between the electrodes 21 and 22 and a predetermined pulse voltage between the electrodes 21 and 22. Generate an electric field.
[0032]
The porous insulator 30 is an electric insulator, and is provided between the electrode 21 and the electrode 22. The porous insulator 30 is filled with a large number of pores, and the air to be processed can pass through the pores as a flow path. The material of the porous insulator 30 has a higher affinity for odorous substances than nitrogen or oxygen, which is a main component of air. Odorous substances in the air are selectively adsorbed on the surface.
[0033]
Examples of the material of the porous insulator 30 include ceramic materials such as alumina, silica, zeolite, and silicon carbide. Further, a capillary plate formed by bundling a number of capillary tubes made of glass or resin can also be used. When these are used, an odorant having a larger molecule than nitrogen or oxygen can be appropriately adsorbed and retained.
[0034]
In particular, when an aldehyde or a fatty acid is used as the odorant, if a porous body such as alumina, zeolite, or silicon carbide is used as the porous insulator 30, the aldehyde or the fatty acid can be selectively used in the air to be treated. Can be adsorbed.
[0035]
Then, for example, the above-described porous material is cut into a desired shape, or the above-mentioned porous material is filled with particles to form a packed layer, or the partition wall extends in the flow direction using the above-described porous material. The porous insulator 30 can be configured by forming a honeycomb structured body or a bundle of a number of capillary tubes to form a capillary plate.
[0036]
It is preferable that the pore diameter or the capillary diameter of the porous insulator 30 be about 1 μm to 50 μm. When these diameters are less than 1 μm, the pressure loss at the time of passage of the air to be treated tends to increase, while when they exceed 50 μm, the specific surface area tends to decrease, and the maximum holding capacity of the odorant tends to decrease. .
[0037]
The odor sensor 60 measures the concentration of the odorant in the treated air discharged from the porous insulator 30 after coming into contact with the porous insulator 30, and includes, for example, a hot-wire sintered semiconductor sensor, A substrate type semiconductor sensor or the like can be used. The odor sensor 60 is connected to the application timing control device 50, and information on the concentration of the odorant is transmitted to the application timing control device 50.
[0038]
The application timing control device 50 is connected to the voltage application device 40. The application timing control device 50 determines whether the odor substance in the treated air has a concentration higher than a predetermined concentration based on the information on the odor concentration The voltage application timing of the voltage application device 40 is controlled so that a predetermined number of unipolar pulse voltages are applied.
[0039]
Next, the operation of the deodorizing apparatus 100 according to the present embodiment will be described. First, when air to be treated containing an odorous substance flows through the pipe 10 from left to right in the figure by the pump 1, the air to be treated contacts the porous insulator 30 while the inside of the porous insulator 30 is shown in the figure. It flows to the right.
[0040]
Here, the odor substance such as aldehyde and the nitrogen and oxygen in the air have a difference in affinity with the porous insulator 30, and the odor substance has a higher affinity with the porous insulator 30 and has an odor. The substance is easily adsorbed on the porous insulator 30. Therefore, the odorous substance requires more time to pass through the porous insulator 30 than nitrogen and oxygen.
[0041]
For this reason, the odorous substance stays and accumulates in the porous insulator 30. As a result, the treated air flowing out from the downstream end of the porous insulator 30 has almost no odorous substance, and the air to be treated is deodorized.
[0042]
This state continues for a while, and the amount of the odor substance retained in the porous insulator 30 increases. Then, after a lapse of a predetermined time, the amount of the odor substance retained in the porous insulator 30 is saturated, and the odor substance starts to be discharged from the downstream end of the porous insulator 30.
[0043]
Then, the odor sensor 60 detects this, and the application timing control device 50 controls the voltage application device 40 to apply a pulse voltage between the electrode 21 and the electrode 22 a predetermined number of times.
[0044]
As a result, a predetermined electric field is generated between the electrode 21 and the electrode 22, and the odorous substance held in the porous insulator 30 is decomposed. At this time, a discharge is generated between the electrodes 21 and 22 to such an extent that dielectric breakdown does not occur.
[0045]
The components generated by the decomposition are discharged from the porous insulator 30 to the downstream side, so that the odorant can be further retained in the porous insulator 30.
[0046]
As described above, in the deodorizing apparatus 100 according to the present embodiment, when the air to be treated comes into contact with the porous insulator 30, the odorous substance in the air to be treated is selectively present in the porous insulator 30. And removes odorous substances from the treated air. Further, after a predetermined amount of the odor substance is retained in the porous insulator 30, a voltage is applied to the pair of electrodes 21 and 22 sandwiching the porous insulator 30, so that the odor substance is retained in the porous insulator 30. An electric field acts on the accumulated odor substance, and the odor substance is decomposed. For this reason, the odorous substance in the air to be treated can be sufficiently retained in the porous material again.
[0047]
Then, the voltage may be applied each time the odor is held and sufficiently accumulated in the porous insulator 30. Therefore, compared to the case where the odor is not accumulated without the porous insulator 30 and the odor substance is not accumulated, the discharge is performed. The number of times has been reduced.
[0048]
Even if the porous insulator 30 is made conductive, that is, even if the electrodes 21 and 22 are made porous and odorous substances are accumulated, an electric field cannot be generated in the conductor, so that the porous insulator 30 is made conductive. At this time, the decomposition of the odorous substance is hardly performed, and the effect of this embodiment is not obtained.
[0049]
Further, since the porous insulator 30 selectively adsorbs odorous substances in the air to be treated, the odorous substances can be appropriately retained and accumulated inside the air when the air to be treated passes. Thereby, the number of times of voltage application can be sufficiently reduced.
[0050]
Further, the voltage applying device 40 applies a pulse voltage between the electrodes 21 and 22. For this reason, since a strong electric field can be generated between the electrodes 21 and 22, the decomposition of the odorous substance is performed more suitably.
[0051]
Here, the pulse width is preferably 1 ns or more and 200 ns or less in order to suitably decompose the odor substance accumulated in the insulator.
[0052]
Further, it is preferable that the pulse voltage is set so that the intensity of the electric field between the electrodes 21 and 22 is 0.8 kV / mm or more and 3.0 kV / mm or less.
[0053]
When the intensity of the electric field between the electrodes 21 and 22 is lower than 0.8 kV / mm, the decomposition of the odorant tends to be difficult to occur. On the other hand, if the strength of the electric field between the electrodes 21 and 22 exceeds 3.0 kV / mm, insulation is easily broken, the effective electric field between the electrodes 21 and 22 decreases, and the decomposition efficiency and energy efficiency tend to decrease. is there. Note that the optimum electric field strength (the magnitude of the applied voltage) in this range varies depending on humidity, atmospheric pressure, and the like.
[0054]
The distance between the electrode 21 and the electrode 22 is preferably 5 mm or more and 20 mm or less. For example, assuming that the distance between the electrodes 21 and 22 is 10 mm, the pulse voltage is set to 8 kV in order to make the electric field intensity between the electrodes 21 and 22 0.8 kV / mm or more and 3.0 kV / mm or less. The voltage may be set to 30 kV or less.
[0055]
In addition, the porous insulator 30 has a maximum value of the odor substance that can be retained inside the porous insulator 30 depending on the condition of the air to be treated, and when the odor substance is supplied beyond the maximum value, the odor substance is left as it is. Discharge. Therefore, information on the concentration of the odorant contained in the treated air discharged from the porous insulator 30 is acquired by the odor sensor 60, and when the concentration of the odorant exceeds a predetermined threshold, the voltage application by the voltage application device 40 is performed. Is performed by the application timing control device 50 to control the voltage application device 40.
[0056]
For this reason, the maximum amount of odor substances that can be retained in the porous insulator 30 is retained without being affected by a change in the concentration of the odor substance in the air to be processed or a change in the supply amount of the substance to be processed. After that, a voltage for applying an electric field can be applied. Thereby, the timing of voltage application can be optimized, and further energy saving can be achieved.
[0057]
The air to be processed is caused to flow toward the right in the drawing, and the electrodes 21 and 22 are arranged in parallel with the flow of the air to be processed. For this reason, it is possible to change the length of the porous insulator 30 in the flow direction without changing the thickness between the electrodes 21 and 22, thereby changing the maximum value of the capacity in which the odorant can be retained, and changing the deodorizing conditions. It is easy to change the configuration of the deodorizing device according to the requirements.
[0058]
(Second embodiment)
Next, a deodorizing apparatus 200 according to the second embodiment will be described. The deodorizing apparatus 200 according to the present embodiment is different from the deodorizing apparatus 100 in that porous insulators 31, 32, and 33 similar to the porous insulator 30 are processed below the porous insulator 30. The points arranged in this order in parallel with the flow of the air and at a predetermined distance from each other in the downward direction, and correspondingly, these porous insulators 31, 32, 33 The point is that an electric field is applied.
[0059]
An electrode 121 is provided between the porous insulator 31 and the porous insulator 32, an electrode 222 is provided between the porous insulator 32 and the porous insulator 33, and an electrode is provided below the porous insulator 33. 221 are provided, respectively. Further, the electrode 121 and the electrode 221 are electrically connected to the terminal 40b of the voltage applying device 40 via the line L1 similarly to the electrode 21. The electrode 222 is electrically connected to the terminal 40a of the voltage applying device 40 via the line L2, similarly to the electrode 22.
[0060]
According to such a deodorizing apparatus 200, the porous insulator 31 is provided with the electrode 22 and the electrode 121, the porous insulator 32 is provided with the electrode 121 and the electrode 222, and the porous insulator 33 is provided with the electrode 222 and the electrode 222. Since an electric field acts on each of the electrodes 221, each of the porous insulators 30 to 33 has the same operation and effect as the above-described deodorizing apparatus 100.
[0061]
In addition, a plurality of porous insulators 30 to 33 are provided in the width direction of the pipe 10, and an electric field acts on each of the porous insulators 30 in the width direction of the pipe 10. Therefore, the distance between the electrodes can be made sufficiently smaller than the length of the conduit 10 in the width direction. Thereby, the distance between the electrodes is maintained at, for example, about 10 mm, and an electric field of about 1.0 kV / mm is generated by applying a voltage of about 10 kV, while the combination of the porous insulator 30 and the electrodes is moved in the width direction. By providing a plurality of pipes, suitable deodorization becomes possible even in a wide pipeline 10. Further, when the diameter of the conduit 10 is maintained, the distance between the electrodes is reduced, so that the voltage applied to the electrodes can be reduced.
[0062]
(Third embodiment)
Next, a deodorizing device 300 according to a third embodiment will be described. The deodorizing device 300 according to the present embodiment is different from the deodorizing device 100 of the first embodiment in that the electrodes 21 and 22 arranged in parallel to the flow of the air to be processed are perpendicular to the flowing direction of the air to be processed. Is provided with mesh-like electrodes 321 and 322 which are respectively arranged in the same manner as above. The mesh electrodes 321 and 322 are formed in a mesh shape so that air to be processed can flow through the mesh electrodes 321 and 322 vertically. The porous insulator 30 is sandwiched between the mesh electrodes 321 and 322. The mesh electrode 321 is electrically connected to the terminal 40b of the voltage application device 40 via the line L1, and the mesh electrode 322 is It is electrically connected to the terminal 40a of the voltage applying device 40 via the line L2.
[0063]
According to the deodorizing device 300, the same operation and effect as those of the deodorizing device 100 can be obtained, and even when the inner diameter of the pipe 10 is increased, the distance between the mesh electrodes 321 and 322 can be maintained. It is possible to easily realize a deodorizing apparatus for the throughput.
[0064]
(Fourth embodiment)
Next, a deodorizing device 400 according to a fourth embodiment will be described with reference to FIG. The deodorizing device 400 according to the present embodiment is different from the deodorizing device 100 of the first embodiment in that a cylindrical tubular electrode 421 coaxial with the pipeline 10 is provided in the cylindrical pipeline 10. The cylindrical electrode 421 has a columnar porous insulator 430 coaxial with the cylindrical electrode 421, and the rod-shaped center electrode 422 penetrating through the center of the porous insulator 430 in the axial direction in the porous insulator 430. Is provided.
[0065]
The cylindrical electrode 421 is sized so as to be substantially inscribed in the conduit 410, and is electrically connected to the terminal 40b of the voltage applying device 40 via the line L1.
[0066]
The rod-shaped electrode 422 is electrically connected to the terminal 40a of the voltage applying device 40 via the line L2.
[0067]
In such a deodorizing device 400, a predetermined electric field is generated between the rod-shaped electrode 422 and the cylindrical electrode 421, so that the same operation and effect as in the first embodiment can be obtained.
[0068]
In addition, since it has the cylindrical electrode 421 and the rod-shaped electrode 422, the porous insulator 30 and the electrodes 421 and 422 are effectively used in the circular conduit 10 by effectively using the internal space. Can be placed.
[0069]
Note that the deodorizing device according to the present invention is not limited to the above embodiment, and can take various modifications.
[0070]
For example, in the above embodiment, the odor substance contained in the air is removed. However, the present invention is not limited to this. For example, the odor substance and the like in the nitrogen gas can be removed. In this case, depending on the properties of the odor substance to be deodorized and the properties of the other non-target gases, a material capable of selectively adsorbing the deodorant substance, that is, a odor substance rather than a non-target gas. What is necessary is just to select a material having high affinity for the porous insulator 30. Similarly, it can be applied to liquid instead of gas, for example, it can be applied to removal of odorous substances in river water.
[0071]
In addition, the mechanism of the selective residence in the porous insulator 30 is not limited to the adsorption, and may use a chemical bond, a molecular sieve, or the like.
[0072]
In the above embodiment, the air to be treated is forcibly supplied to the porous insulator 30. However, the deodorizing devices 100 to 400 may be simply installed in the space where the air to be treated is present. Even in this case, the odorous substance accumulates in the porous insulator 30 due to diffusion or the like with the passage of time, and can be decomposed by the electric field every predetermined time.
[0073]
Further, the cross-sectional shape of the conduit 10 is not limited to a circle, a rectangle, or the like, and can be applied to a conduit having an arbitrary cross-sectional shape.
The deodorizing device as described above can be applied to, for example, deodorization in closed spaces such as in trains, cars, airplanes, buildings, factories, and the like, and deodorization of exhaust gas and wastewater therefrom.
[0074]
【The invention's effect】
As described above, according to the present invention, the odor substance in the fluid is retained and accumulated in the insulating odor substance retaining means. Then, when a voltage is applied between the electrodes, an electric field acts on the odor substance held by the odor substance retaining means, and the odor substance is decomposed. Therefore, it is sufficient to apply the voltage after the odor substance is accumulated in the odor substance retaining means and sufficiently accumulated, and the number of times of discharge can be reduced as compared with the case where the odor substance is not accumulated without the odor substance retaining means. For this reason, energy saving of the deodorizing device becomes possible.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a deodorizing device according to a first embodiment.
FIG. 2 is a schematic configuration diagram illustrating a deodorizing device according to a second embodiment.
FIG. 3 is a partially broken perspective view showing a deodorizing device according to a third embodiment.
FIG. 4 is a partially broken perspective view showing a deodorizing device according to a fourth embodiment.
[Explanation of symbols]
21, 22, 121, 221, 222 ... electrode, 321, 322 ... mesh electrode, 421 ... cylindrical electrode, 422 ... rod electrode, 30, 31, 32, 33, 430 ... porous insulator (odor substance retention means ), 40: voltage applying device, 50: application timing control device, 60: odor sensor, 100, 200, 300, 400: deodorizing device.

Claims (11)

A pair of electrodes facing each other,
Odor substance retention means provided between the pair of electrodes, which is an electrical insulator, and selectively retains the odor substance in the fluid when it comes into contact with the fluid containing the odor substance,
A voltage application device that applies a voltage between the pair of electrodes,
Deodorizing device provided with. 2. The deodorizing apparatus according to claim 1, wherein the odorant staying means selectively adsorbs the odorant in the fluid when the odorant stays in contact with the fluid containing the odorant. 3. The deodorizing apparatus according to claim 1, wherein said odor substance retaining means includes a porous ceramic or a capillary tube. The deodorization device according to claim 1, wherein the voltage application device applies a pulse voltage between the pair of electrodes. The deodorizing device according to claim 4, wherein the voltage applying device applies a voltage between the pair of electrodes so that an electric field intensity between the pair of electrodes is 0.8 kV / mm or more and 3.0 kV / mm or less. apparatus. An odor sensor that acquires information on the concentration of the odorant contained in the fluid discharged from the odorant retention unit,
An application timing control device that controls timing of voltage application by the voltage application device based on information about the concentration of the odorant,
The deodorizing device according to any one of claims 1 to 5, comprising: The deodorizing device according to any one of claims 1 to 6, wherein the fluid containing the odorant is caused to flow in a predetermined direction, and each of the pair of electrodes is arranged in parallel with the flow of the fluid. A second odorant retention means is provided on the opposite side to the odorant retention means with one of the pair of electrodes interposed therebetween, and one of the pair of electrodes sandwiches the second odorant retention means. The deodorizing device according to claim 7, further comprising a second electrode electrically connected to the other of the pair of electrodes on the opposite side. The fluid containing the odorant is caused to flow in a predetermined direction, and each of the pair of electrodes is arranged in a direction intersecting the flow of the fluid, and has a mesh shape. The deodorizing device according to claim 1. The deodorizing device according to any one of claims 1 to 6, wherein one of the pair of electrodes has a rod shape, and the other of the pair of electrodes has a cylindrical shape surrounding the one electrode. Contacting a fluid containing an odorant with an electrical insulator, and selectively retaining the odorant in the fluid on the electrical insulator;
A step of applying a predetermined electric field to the electric insulator in which the odorous substance is retained,
A method for deodorizing odorous substances including.

Images