JP3618591B2 - Electrostatic dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrostatic dust collector, and more particularly to an electrostatic dust collector characterized by a support interval and a feed pitch of electrode plates constituting a dust collector.
[0002]
[Prior art]
Conventionally, dust in the air ionized by corona discharge in the charged part is connected to a power source to form an electric field between the non-dust collecting electrode and the dust collecting electrode, and the dust collecting electrode is electrostatically generated in the electric field. There is known an electrostatic dust collector that collects water.
[0003]
In such a dust collector, for example, a positive corona discharge space is formed in the charging portion, dust in the air is charged positively, and the dust particles are relatively on the negative side of the non-dust collecting electrode of the dust collecting portion. Electrostatically collected on a dust collecting electrode connected to a power source or ground potential. In addition, a power supply is connected so that the dust collecting electrode collects even when a negative discharge is caused by the charging portion.
[0004]
In such electrostatic dust collectors, metals have been used as electrodes. However, if a metal is used for the electrode, a spark may be generated when the potential difference between the non-dust collecting electrode and the dust collecting electrode is increased, or when collected dust accumulates on the dust collecting electrode and the resistance decreases as a result. It was inevitable that a discharge or spark occurred. In addition, when the insulating part holding the electrode, the spacer, or the like becomes dirty, a collector leakage current flows, and the potential difference is lowered and the collection performance is lowered. Further, as shown in registered utility model No. 3031345, for example, in FIG. 8, a comb-shaped charging rod for supporting the non-dust collecting side electrode 101 and supplying power to the non-dust collecting side electrode 101 is used. 103 is formed of a semi-insulating resin, and the dust collecting side electrode 105 is inserted into the comb-shaped ground rod 107 so as not to contact the non-dust collecting side electrode 101.
[0005]
[Problems to be solved by the invention]
However, such a conventional technique still has a problem that sparks are still easily generated because the electrodes are made of metal.
[0006]
An object of the present invention is made by paying attention to the conventional technology as described above, and is to provide an electrostatic dust collector capable of maintaining a collection efficiency and preventing sparks. .
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the electrostatic dust collector of the invention according to claim 1 generates dust in the air ionized by corona discharge of the charged portion between the non-dust-collecting electrode and the dust-collecting electrode. An electrostatic dust collector that electrostatically collects in a generated electric field, wherein the non-dust collecting electrode is a thin plate electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more. In addition, this non-dust collecting electrode and the thin plate-like dust collecting electrode are arranged in parallel so as not to contact each other, and the non-dust collecting electrode is connected to the power source by a power supply member made of a functional material similar to the non-dust collecting electrode. Ri greens and pitch P (mm) is the applied voltage V (kV) between the feeding member, that is ^{P ≦ 2.05 · V 2 -17.7 ·} V + 96.4, those wherein is there.
[0008]
Therefore, the thin plate-like non-dust collecting electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more and the thin plate-like dust collecting electrode are arranged in parallel so as not to contact each other. Is connected to a power source by a power supply member which is also a semi-insulating resin. The power feeding member supports the non-dust collecting electrodes at a pitch P (mm) in the range of P ≦ 2.05 · V ² −17.7 · V + 96.4 with respect to the applied voltage V (kV) .
[0009]
The electrostatic dust collector of the invention according to claim 2 is the electrostatic dust collector according to claim 1 , wherein the non-dust collecting electrode and the power supply member have a volume resistivity of 10 ¹⁰ to 10 ¹³ Ωcm. It is characterized by this.
[0010]
Therefore, the non-dust collecting electrode and the power supply member are formed of a member having a volume resistivity of 10 ¹⁰ to 10 ¹³ Ωcm.
[0011]
The electrostatic dust collector of the invention according to claim 3 electrostatically captures dust in the air ionized by corona discharge of the charged part in an electric field generated between the non-dust collecting electrode and the dust collecting electrode. An electrostatic precipitator for collecting, wherein the non-dust collecting electrode is a flat electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and the dust collecting electrode is electrically conductive It is a flat electrode made of a material, and the non-dust collecting electrodes and the dust collecting electrodes are stacked in parallel so as not to contact each other, and is composed of a functional material similar to the non-dust collecting electrode. A first support member that supports the non-dust-collecting electrode in a non-contact state and is connected to a first power source, and a dust-collecting electrode that is made of a functional material similar to the dust-collecting electrode and that is not in contact with the non-dust-collecting electrode a second support member connected to the second power supply in favor of, Ri Na and wherein the first Pitch Y (mm) is the applied voltage V (kV) between the supporting members, that is ^{Y ≦ 2.05 · V 2 -17.7 ·} V + 96.4, those characterized.
[0012]
Therefore, flat non-dust collecting electrodes made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more and flat dust collecting electrodes made of a conductive material are laminated in parallel without contacting each other. The non-dust collecting electrode is supported by a first support member made of a material having the same function so as not to come into contact with the dust collecting electrode, and is simultaneously connected to the first power source. The dust collection electrode is supported by a second support member made of a material having a similar function so as not to contact the non-dust collection electrode, and is simultaneously connected to the second power source. The first support member supports the non-dust collecting electrode within a range of Y ≦ 2.05 · V ² −17.7 · V + 96.4 with respect to the applied voltage V (kV) at the pitch Y (mm) .
[0013]
The electrostatic dust collector of the invention according to claim 4 electrostatically captures dust in the air ionized by corona discharge of the charged part in an electric field generated between the non-dust collecting electrode and the dust collecting electrode. An electrostatic precipitator for collecting, wherein the non-dust collecting electrode is a flat electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and the dust collecting electrode is electrically conductive It is a flat electrode made of a material, and the non-dust collecting electrodes and the dust collecting electrodes are stacked in parallel so as not to contact each other, and is composed of a functional material similar to the non-dust collecting electrode. A first support member that supports the non-dust-collecting electrode in a non-contact state and is connected to a first power source, and a dust-collecting electrode that is made of a functional material similar to the dust-collecting electrode and that is not in contact with the non-dust-collecting electrode And a second support member connected to a second power source and supporting the second power source, Pitch Y (mm) is the applied voltage V (kV) between the supporting member, the pitch Y between the first support member with a ^{Y ≦ 2.05 · V 2 -17.7 ·} V + 96.4 (mm) is It is characterized by being 70 mm or less.
[0014]
Therefore, flat non-dust collecting electrodes made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more and flat dust collecting electrodes made of a conductive material are laminated in parallel without contacting each other. The non-dust collecting electrode is supported by a first support member made of a material having the same function so as not to come into contact with the dust collecting electrode, and is simultaneously connected to the first power source. The dust collection electrode is supported by a second support member made of a material having a similar function so as not to contact the non-dust collection electrode, and is simultaneously connected to the second power source. The first support member supports the non-dust collecting electrode within a range of Y ≦ 2.05 · V ² −17.7 · V + 96.4 with respect to the applied voltage V (kV) at the pitch Y (mm) .
The first support member supports the non-dust collecting electrode in a range where the pitch Y (mm) is 70 mm or less.
[0015]
The electrostatic dust collector of the invention according to claim 5 is the electrostatic dust collector according to claim 3 or 4 , wherein the first support member and the second support member are the dust collector electrode and the non-collector. It arrange | positions so that a dust electrode may be penetrated, It is characterized by the above-mentioned.
[0016]
Accordingly, the first support member is disposed so as not to contact the dust collecting electrode, and the second support member is disposed so as not to contact the non-dust collecting electrode.
[0017]
The electrostatic dust collector of the invention according to claim 6 is the electrostatic dust collector according to any one of claims 3 to 5 , wherein the non-dust collecting electrode and the first support member are 10 ¹⁰ to 10 ^13. It has a volume resistivity value of Ωcm.
[0017]
Therefore, the non-dust collecting electrode and the first support member are formed of a material having a volume resistivity of 10 ¹⁰ to 10 ¹³ Ωcm.
[0018]
The electrostatic dust collector of the invention according to claim 7 is the electrostatic dust collector according to any one of claims 3 to 6 , wherein the dust collection electrode and the second support member have a volume of less than 10 ⁸ Ωcm. It has a specific resistance value.
[0019]
Therefore, the dust collection electrode and the second support member are made of a material having a volume resistivity value of less than 10 ⁸ Ωcm.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
1 and 7 together, in the electrostatic dust collector 1 according to the present invention, the non-dust collecting electrode 3 and the dust collecting electrode 5 to which a high voltage is applied are alternately arranged in parallel at a predetermined interval. The ionized air dust is passed through a corona discharge space of a charging unit 9 connected to a power source (not shown) and connected to a power source (not shown), and the non-dust collecting electrode 3 and the dust collecting electrode 5 are connected to each other. There is a dust collection portion 7 that forms an electric field therebetween and electrostatically collects the dust collection electrode 5. In the following description of the present embodiment, for the sake of explanation, a high voltage is applied to the discharge electrode of the charged portion as the first power source, and the charged portion counter electrode is connected to the ground potential as the second power source. Yes. However, it goes without saying that the contents of the present invention are not limited only to this electrical connection, and can be applied to other electrostatic dust collectors having other electrical connections.
[0022]
The non-dust collecting electrode 3 is formed in a flat plate shape from a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more (preferably 10 ¹⁰ to 10 ¹³ Ωcm). The dust collecting electrode 5 is formed in a flat plate shape from a conductive material (which may be a resin) having a volume resistivity of less than 10 ⁸ Ωcm.
[0023]
1 to 3, the non-dust collecting electrode 3 is supported by a plurality of first support bars 11 as first support members made of a semi-insulating resin similar to the non-dust collecting electrode 3. Although a high voltage is supplied by contact, the first support rod 11 does not come into contact with the dust collecting electrode 5 through the hole 13. The first support bar 11 is connected to a high voltage generator of a power source (not shown).
[0024]
The dust collection electrode 5 is supported by a plurality of second support rods 15 as second support members made of the same material as that of the dust collection electrode 5. It is designed not to touch. The second support bar 15 is connected to the ground.
[0025]
Next, the determination of the support pitch (which is also the power supply pitch) by the support rods 11 and 15 of the electrodes 3 and 5 will be described from the viewpoint of the deflection of the electrodes 3 and 5 and the collection efficiency of the dust collecting portion 7. To do.
[0025]
When considering the support pitch from the viewpoint of bending, it is natural that increasing the electrode plate thickness is advantageous in terms of the strength of the electrode itself. However, in order to increase the collection efficiency, that is, to increase the dust collection area, It is desirable to set as thin as possible in consideration of arranging more electrodes and considering ventilation resistance. However, when considering from the viewpoint of ensuring the safety of the apparatus, the plate thickness may have to be increased in consideration of ensuring flame retardancy.
[0026]
Regarding the electrode plate thickness setting of the dust collecting portion as an actual product, for example, non-collecting is performed using a hygroscopic semi-insulating resin material described in Japanese Patent Application Laid-Open No. 8-71451 of the invention made by the present applicant in the past. When manufacturing the dust electrode, the thickness is set to, for example, about 0.2 mm to 3.0 mm in consideration of the above-mentioned contents and the like. A non-dust collecting electrode having a thickness of 0.5 mm formed of a conductive resin material was used for a dust collecting electrode.
[0027]
First, an experiment was conducted on the support pitch from the viewpoint of bending of the electrodes 3 and 5. That is, referring to FIG. 4, the deflection of the charged non-dust collecting electrode 3 sandwiched between the two dust collecting electrodes 5 at the ground potential via the insulating spacer 19 is measured. Actually, when the non-dust collecting electrode 3 is located at an equidistant position between the two dust collecting electrodes 5, the non-dust collecting electrode 3 is pulled from both by the same force so that it is not displaced, but an assembly error Set up a case where it is decentered taking into account changes over time and measure it as an experimental model.
[0027]
Here, when the pitch d of the closer distance is, for example, 1 mm and the other is 3.6 mm, the non-dust collecting electrode 3 is pulled by electrostatic attraction f1 and f2 (f1> f2) from both electrodes 3 and 5. Is pulled downward by the dust collecting electrode 5 and displaced downward. The relationship between the support pitch of the insulating spacer at this time and the applied voltage when the electrodes 3 and 5 are in contact with each other is shown in FIG. In this graph, the limit support pitch at which the four applied voltages 1.9, 2.5, 3.3, and 4.5 kV shown in FIG.
[0028]
When an approximate expression passing through the four fixed points indicated by circles in FIG. 5A is obtained, Y = 2.05 · X ² −17.7 · X + 96.4 is obtained as an example. When the support pitch Y (mm) with respect to each applied voltage X (kV) by this approximate expression is obtained, a sufficiently close value can be obtained as shown in FIG. Therefore, if the support pitch Y is determined within the hatched range in FIG. 5A, it is possible to prevent the electrodes 3 and 5 from being bent and contacting.
[0029]
If the applied voltage is 1.9 kV and the support pitch is 70 mm or less, 3.3 kV and 60 mm or less, the electrodes 3 and 5 do not come into contact with each other, but the electrodes in the above experimental model are not decentered. Considering that in the dust collector when the electrodes are arranged at an equal pitch, the potential difference between the two electrodes, that is, the applied voltage may be set to 3 kV or more in order to obtain a desired value of the collection efficiency. The support pitch Y is preferably selected to be about 60 mm or less.
[0030]
Next, an allowable power supply pitch is obtained from the viewpoint of collection efficiency. That is, when this dust collector 1 is used as a dust collector such as a smoke separator, it is required to operate at a predetermined collection efficiency as soon as the switch is turned on.
[0031]
In the non-dust collecting electrode 3 using a semi-insulating material, it takes time to charge the entire electrode in the relationship of time constant τ = dielectric constant ε × volume specific resistance value ρ. That is, it is known that it takes time to reach a predetermined collection efficiency. Also, as will be apparent from the experiments described later, if the feed pitch exceeds a certain value due to the difference in resistance value affected by the shape of the electrode, etc. It was found that the value (eg 90%) was not reached.
[0032]
For this reason, as for arrangement | positioning of the 1st support rod 11 (about the function as a feeding point) which supplies electric power to the non-dust collection electrode 3, it is desirable for the space | interval between the adjacent 1st support rods 11 to be short. On the other hand, if the number increases to shorten the distance between the first support rods 11, the number of holes 13 for the first support rods 11 in the dust collection electrode 5 increases, the dust collection area decreases, and the dust collection efficiency is reduced. Incurs a decline. Further, the pressure loss increases due to the increase in ventilation resistance. Furthermore, the increase in the first support rod 11 causes a problem of increasing the number of assembling steps.
[0033]
Therefore, the maximum pitch that can reduce the number of the first support rods 11 while maintaining a predetermined collection efficiency is obtained. In FIG. 6 (A), 3 points from the point P0 shown in FIG. 2 (B) to PA (42 mm), PB (70 mm), and PC (192 mm) as well as the support pitch from the viewpoint of bending described above. It went about the kind of distance.
[0034]
FIG. 6 (A) shows the measurement results of the temporal change in the dust collection efficiency for each of the aforementioned power feed pitches when a voltage of 4 kV is applied to the non-dust collection electrode 3. FIG. 6B shows a graph showing the contents of the table in FIG.
[0035]
That is, when the power supply pitch is 42 mm, a predetermined dust collection efficiency (for example, 90%) is satisfied after 1 minute. Further, in the case of 70 mm, the predetermined dust collection efficiency is reached after 15 minutes. However, at a pitch higher than that, the dust collection efficiency does not improve even after 15 minutes, as shown for example for 192 mm. For this reason, the feed pitch is preferably 70 mm or less.
[0036]
From the above results, the first support rod 11 that supports the non-dust collecting electrode 3 plays the role of feeding as well as the structural support member, and the second support rod 15 that supports the dust collection electrode 5. Is also a support member and a ground member (a role corresponding to a power supply member), the support pitch and the power supply from the viewpoint of the deflection of the non-dust collection electrode 3 and the collection efficiency of the dust collection portion 7. It can be said that the pitch is preferably equal to or less than the approximate curve of Y = 2.05 · X ² −17.7 · X + 96.4 and 70 mm or less. Within this range, it is possible to prevent the electrodes 3 and 5 from being collected by contact due to bending, and to obtain a predetermined collection efficiency in a short time after the switch is turned on.
[0037]
The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate modifications. That is, in the above-described embodiment of the present invention, the relationship between the applied voltage and the limit support pitch is shown by a quadratic expression passing through four side fixed points, but is not limited to this. Various curves can be adopted depending on the number of side fixed points and how to obtain approximate curves.
[0038]
In the above-described embodiment of the invention, the case where the dust collecting electrode 5 is made of a conductive resin has been described. However, it is also possible to use a metal or resin such as iron or aluminum that has been subjected to a plating surface treatment. It is.
[0039]
【The invention's effect】
As described above, in the electrostatic dust collector according to the first aspect of the present invention, the thin plate-like non-dust collecting electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and the thin plate-like dust collector. Since the electrodes are arranged in parallel so as not to contact each other alternately, and the non-dust collecting electrodes are similarly connected to the power supply by the power supply member that is a semi-insulating resin, sparking can be prevented. The power feeding member supports the non-dust collecting electrode at a pitch P (mm) in the range of P ≦ 2.05 · V 2 −17.7 · V + 96.4 with respect to the applied voltage V (kV) . Therefore, a predetermined collection efficiency can be obtained in a short time.
[0040]
In the electrostatic dust collector according to the second aspect of the present invention, the non-dust collecting electrode and the power feeding member are formed of a member having a volume specific resistance value of 10 ¹⁰ to 10 ¹³ Ωcm, so that sparking can be prevented. .
[0041]
In the electrostatic dust collector according to the invention of claim 3, a flat non-dust collecting electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and a flat dust collecting made of a conductive material The non-dust collecting electrode is supported so as not to contact the dust collecting electrode by the first supporting member made of a material having the same function, and is simultaneously stacked with the first non-dust collecting electrode. Since it is connected to a power source, it is possible to prevent sparking and to support the non-dust collecting electrode and to supply power. The dust collecting electrode is supported by a second support member made of a material having the same function so as not to contact the non-dust collecting electrode and is connected to the second power source at the same time. Power can be supplied while supporting the dust electrode. The first support member supports the non-dust collecting electrode within a range of Y ≦ 2.05 · V ² −17.7 · V + 96.4 with respect to the applied voltage V (kV) at the pitch Y (mm) .
[0042]
In the electrostatic dust collector according to the invention of claim 4, a flat non-dust collecting electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and a flat dust collecting made of a conductive material The non-dust collecting electrode is supported so as not to contact the dust collecting electrode by the first supporting member made of a material having the same function, and is simultaneously stacked with the first non-dust collecting electrode. Since it is connected to a power source, it is possible to prevent sparking and to support the non-dust collecting electrode and to supply power. The dust collecting electrode is supported by a second support member made of a material having the same function so as not to contact the non-dust collecting electrode and is connected to the second power source at the same time. Power can be supplied while supporting the dust electrode. The first support member supports the non-dust collecting electrode within a range of Y ≦ 2.05 · V ² −17.7 · V + 96.4 with respect to the applied voltage V (kV) at the pitch Y (mm) . Since the first support member supports the non-dust collecting electrode in a range where the pitch Y (mm) is 70 mm or less, it is possible to prevent sparks due to the deflection of the non-dust collecting electrode.
[0043]
In the electrostatic dust collector according to the fifth aspect of the invention, the first support member is disposed so as not to contact the dust collection electrode, and the second support member is disposed so as not to contact the non-dust collection electrode. Since it is arranged, a spark can be prevented.
[0044]
In the electrostatic dust collector according to the invention of claim 6 , the non-dust collecting electrode and the first support member are formed of a material having a volume resistivity of 10 ¹⁰ to 10 ¹³ Ωcm. Sparks between the dust collecting electrodes can be prevented.
[0054]
In the electrostatic precipitator according to the seventh aspect of the invention, since the dust collecting electrode and the second support member are made of a material having a volume resistivity of less than 10 ⁸ Ωcm, the potential of the dust collecting electrode is made uniform. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a support state of a non-dust collecting electrode and a dust collecting electrode in an electrostatic dust collecting apparatus according to the present invention.
FIG. 2 is a plan view seen from the direction II in FIG.
FIG. 3 is a front view as seen from the direction III in FIG.
FIG. 4 is a model used to determine a support pitch.
FIG. 5A is a graph showing the relationship between the support pitch and the contact applied voltage, and FIG. 5B is a table showing the values.
FIG. 6A is a table showing the relationship between the feed pitch and dust collection efficiency, and FIG. 6B is a graph thereof.
FIG. 7 is an external view of an electrostatic dust collector according to the present invention.
FIG. 8 is a front view showing a conventional non-dust collecting electrode and a supported state of the dust collecting electrode.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electrostatic dust collector 3 Non-dust collection electrode 5 Dust collection electrode 11 First support rod (first support member)
15 Second support rod (second support member)

Claims (7)

An electrostatic precipitator for electrostatically collecting dust in the air ionized by corona discharge of a charged part in an electric field generated between a non-dust collecting electrode and a dust collecting electrode. The dust collecting electrode is a thin plate electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and the non-dust collecting electrode and the thin plate dust collecting electrode are arranged in parallel so as not to contact each other alternately. arrangement and, Ri name to connect the non-collection electrode by constituted power supply member in the non-collection electrode similar functional material supply, the pitch P between the feeding member (mm) is the applied voltage V (kV) , P ≦ 2.05 · V ² −17.7 · V + 96.4 . The non-dust collecting electrode and the feeding member 10 ¹⁰ 10 ¹³ to have a volume resistivity of [Omega] cm, an electrostatic precipitator according to claim 1, wherein. An electrostatic precipitator for electrostatically collecting dust in the air ionized by corona discharge of a charged part in an electric field generated between a non-dust collecting electrode and a dust collecting electrode, The dust collecting electrode is a flat electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and the dust collecting electrode is a flat electrode made of a conductive material, and the non-dust collecting electrode The electrode and the dust collecting electrode are stacked in parallel so as not to contact each other, and the first non-dust collecting electrode is supported by the non-dust collecting electrode in a state of being made of a functional material similar to the non-dust collecting electrode. A first support member connected to a power source of the second and a second member connected to a second power source by supporting the dust collection electrode in a state of being made of a functional material similar to the dust collection electrode and not in contact with the non-dust collection electrode a support member, Ri Na includes a pitch Y (mm) between the first support member applied electric For V (kV), to be a ^{Y ≦ 2.05 · V 2 -17.7 ·} V + 96.4, electrostatic precipitator, characterized. An electrostatic precipitator for electrostatically collecting dust in the air ionized by corona discharge of a charged part in an electric field generated between a non-dust collecting electrode and a dust collecting electrode, The dust collecting electrode is a flat electrode made of a semi-insulating resin having a volume resistivity of 10 ⁸ Ωcm or more, and the dust collecting electrode is a flat electrode made of a conductive material, and the non-dust collecting electrode The electrode and the dust collecting electrode are stacked in parallel so as not to contact each other, and the first non-dust collecting electrode is supported by the non-dust collecting electrode in a state of being made of a functional material similar to the non-dust collecting electrode. A first support member connected to a power source of the second and a second member connected to a second power source by supporting the dust collection electrode in a state of being made of a functional material similar to the dust collection electrode and not in contact with the non-dust collection electrode A pitch Y (mm) between the first support members. For V (kV), the pitch Y between the first support member with a ^{Y ≦ 2.05 · V 2 -17.7 ·} V + 96.4 (mm) is 70mm or less, electrostatic, characterized Type dust collector. The electrostatic dust collection according to claim 3 or 4 , wherein the first support member and the second support member are disposed so as to penetrate the dust collection electrode and the non-dust collection electrode. apparatus. The electrostatic dust collector according to claim 3, wherein the non-dust collecting electrode and the first support member have a volume resistivity of 10 ¹⁰ to 10 ¹³ Ωcm. The electrostatic dust collector according to any one of claims 3 to 6, wherein the dust collection electrode and the second support member have a volume resistivity value of less than 10 ⁸ Ωcm.

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