JP2018051413A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector which can improve collection efficiency of particles without increasing a dimension of a dust collecting electrode.SOLUTION: A dust collector 1 collects particles 100 floating in gas, and includes a discharge electrode 42 which charges the particles 100 by generating a discharge, a dust collecting electrode 51 for collecting the charged particles 100, and a fan 10 for guiding the gas to the discharge electrode 42 and the dust collecting electrode 51. The dust collecting electrode 51 includes a conductive member 55, and a coating member 56 for coating at least a part of the conductive member 55. The coating member 56 includes a resin material 57. The resin material 57 has an acrylic skelton in a main chain, and has a functional group of fluorine as a side chain. A composition ratio of a carbon atom and a fluorine atom in the resin material 57 is in a range of 99:1 to 80:20.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a dust collector that collects particles floating in a gas.

  2. Description of the Related Art Conventionally, there is known a dust collector that charges particles such as fine particulate matter floating in a gas such as room air and collects the charged particles by a dust collecting electrode to which a voltage is applied (for example, Patent Document 1).

  In the dust collector described in Patent Document 1, the particles introduced into the dust collector by a fan are charged and electrically attracted to the dust collection electrode, so that the fine particles are difficult to collect with an air filter or the like. Can be collected relatively efficiently.

JP-A-6-254437

  In the dust collecting apparatus described in Patent Document 1, as one means for further increasing the particle collection efficiency, there is a means for enlarging the size of the dust collecting electrode in the gas flow direction.

  However, when the means is employed, the size of the dust collecting device is increased, and the cost required for the dust collecting electrode is increased.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a dust collector capable of improving the efficiency of collecting particles without enlarging the size of the dust collecting electrode. And

  In order to solve the above problems, one aspect of a dust collector according to the present invention is a dust collector that collects particles suspended in a gas, and a discharge electrode that charges the particles by generating a discharge. A dust collecting electrode for collecting charged particles, and a fan for guiding gas toward the discharge electrode and the dust collecting electrode. The dust collection electrode includes a conductive member and a covering member that covers at least a part of the conductive member, and the covering member includes a resin material. The resin material has an acrylic skeleton in the main chain and a fluorine functional group as a side chain, and the composition ratio of carbon atoms to fluorine atoms in the resin material is in a range from 99: 1 to 80:20. Is within.

  ADVANTAGE OF THE INVENTION According to this invention, it can implement | achieve providing the dust collector which can improve the collection efficiency of particle | grains, without enlarging the dimension of a dust collection electrode.

FIG. 1 is a schematic cross-sectional view showing the overall configuration of the dust collector according to the embodiment. FIG. 2 is a perspective view illustrating an outline of the discharge unit and the dust collection unit of the dust collector according to the embodiment. FIG. 3 is a cross-sectional view showing an outline of the structure of the dust collection electrode according to the embodiment. Drawing 4 is a figure showing an outline of composition and operation of a discharge part of a dust collecting device concerning an embodiment, and a dust collection part. FIG. 5 is a cross-sectional view showing an outline of the structure of the dust collection electrode according to a modification of the embodiment. FIG. 6 is a diagram showing an outline of the configuration and operation of the discharge electrode and the dust collection electrode of a dust collector according to another modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
Hereinafter, the dust collector 1 which concerns on embodiment is demonstrated.

[overall structure]
First, the whole structure of the dust collector 1 which concerns on this Embodiment is demonstrated using drawing.

  FIG. 1 is a schematic cross-sectional view showing an overall configuration of a dust collector 1 according to the present embodiment.

  FIG. 2 is a perspective view showing an outline of the discharge unit 40 and the dust collection unit 50 of the dust collector 1 according to the present embodiment.

  As shown in FIG. 1, the dust collector 1 according to the present embodiment includes a fan 10, a duct 20, a filter 30, a discharge unit 40, a dust collector 50, a high-voltage power supply 60, and a case 70. As shown in FIG. 2, the discharge unit 40 includes a discharge electrode 42 and a low potential electrode 41, and the dust collection unit 50 includes a dust collection electrode 51 and a counter electrode 52.

  The fan 10 is a device that guides gas from the outside of the dust collector 1 to the inside of the dust collector 1. The fan 10 guides the gas outside the dust collector 1 toward the discharge electrode 42 in the discharge unit 40 and the dust collection electrode 51 in the dust collector 50, and collects the gas purified in the dust collector 50. Discharge to the outside of the apparatus 1. The fan 10 may be any device that can suck and discharge gas. For example, a centrifugal fan or the like is used as the fan 10.

  The duct 20 is a tubular member serving as a gas flow path guided from the outside of the dust collector 1 by the fan 10. The fan 10 is provided at one end of the duct 20, and the filter 30 is provided at the other end. Further, a discharge unit 40 and a dust collection unit 50 are provided inside the duct 20. The material constituting the duct 20 is not particularly limited. For example, the duct 20 is made of an insulating material such as resin. Since the duct 20 is made of an insulating material, discharge between the duct 20 and the discharge electrode 42 can be suppressed.

  The filter 30 is a collecting member for collecting relatively large particles in the gas guided into the dust collector 1. Thereby, a short circuit caused by relatively large particles between the discharge electrode 42 and the low potential electrode 41 of the discharge unit 40 or between the dust collection electrode 51 and the counter electrode 52 of the dust collection unit 50, and the dust collection unit Particle deposition at 50 can be reduced. A known air filter can be used as the filter 30. For example, a HEPA filter or the like may be used as the filter 30.

  The high-voltage power supply 60 is a power supply that applies a voltage to the discharge electrode 42 and the low-potential electrode 41 in the discharge unit 40, and the dust collection electrode 51 and the counter electrode 52 in the dust collection unit 50. As the high-voltage power supply 60, any voltage source that can output a desired DC voltage may be used. In the present embodiment, the high-voltage power supply 60 is provided inside the dust collector 1, but the high-voltage power supply 60 is not necessarily provided inside the dust collector 1. For example, the high voltage power supply 60 may be provided outside the dust collector 1, and a voltage may be applied to each electrode inside the dust collector 1 from the outside of the dust collector 1.

  The discharge part 40 is a component for charging particles floating in the gas guided into the dust collector 1 by generating a discharge. In the present embodiment, the discharge unit 40 includes a grounded low potential electrode 41 and a discharge electrode 42 to which a positive voltage is applied to the low potential electrode 41. A voltage is applied to the discharge electrode 42 from the high voltage power supply 60. The magnitude of the voltage applied to the discharge electrode 42 is appropriately set so that corona discharge occurs between the discharge electrode 42 and the low potential electrode 41. For example, when the interval between the discharge electrode 42 and the low potential electrode 41 is 20 mm, the magnitude of the voltage applied to the discharge electrode 42 is about 10 kV.

  In the present embodiment, the discharge electrode 42 is composed of a linear conductive member extending parallel to the X axis shown in FIG. For example, the discharge electrode 42 is made of stainless steel. In the present embodiment, the low potential electrode 41 is composed of a plate-like conductive member arranged in parallel to the XY plane shown in FIG. For example, the low potential electrode 41 is made of stainless steel.

  The dust collection unit 50 is a component that collects charged particles in the gas guided into the dust collector 1. In the present embodiment, the dust collection unit 50 includes a grounded dust collection electrode 51 and a counter electrode 52 to which a positive voltage is applied to the dust collection electrode 51. A voltage is applied to the counter electrode 52 from the high voltage power supply 60. The magnitude of the voltage applied to the counter electrode 52 is such that an electric field is generated between the dust collection electrode 51 and the counter electrode 52 so that positively charged particles are adsorbed to the dust collection electrode 51 by the electric field. Is set as appropriate. For example, when the distance between the dust collection electrode 51 and the counter electrode 52 is 20 mm, the magnitude of the voltage applied to the counter electrode 52 is about 10 kV.

  In the present embodiment, the dust collection electrode 51 has a flat plate-like conductive member arranged in parallel to the XY plane shown in FIG. 2 and a covering member that covers at least a part of the conductive member. A detailed configuration of the dust collecting electrode 51 which is a characteristic component of the dust collecting apparatus 1 according to the present embodiment will be described later.

  In the present embodiment, the counter electrode 52 is composed of a flat plate-like conductive member disposed in parallel to the XY plane shown in FIG. For example, the counter electrode 52 is made of stainless steel.

  The case 70 is a box-shaped member that houses the above-described components of the dust collector 1. The case 70 includes a suction port 71 through which gas is sucked from the outside of the dust collector 1 and a discharge port 72 through which gas is discharged from the inside of the dust collector 1. The material constituting the case 70 is not particularly limited. For example, the case 70 is made of resin.

[Configuration of dust collection electrode]
Subsequently, a dust collection electrode 51 that is a characteristic component of the dust collector 1 according to the present embodiment will be described with reference to the drawings.

  FIG. 3 is a cross-sectional view showing an outline of the structure of the dust collection electrode 51 according to the present embodiment.

  As shown in FIG. 3, the dust collection electrode 51 includes a conductive member 55 and a covering member 56 that covers at least a part of the conductive member 55. Further, the covering member 56 includes a resin material 57, and in the present embodiment, the covering member 56 is substantially constituted only by the resin material 57. In FIG. 3, the covering members 56 are provided on both main surfaces of the dust collecting electrode 51. However, when particles are collected only on one main surface of the dust collecting electrode 51, The covering member 56 may be provided only on the one main surface.

  The resin material 57 has an acrylic skeleton in the main chain and has a fluorine functional group as a side chain. In other words, the resin material 57 is a resin in which a hydrocarbon group or a part of hydrogen atoms in the side chain of the acrylic resin is substituted with fluorine.

  Since the dust collection electrode 51 has the above-described configuration, fluorine atoms appear on the surface of the covering member 56 (resin material 57) in the dust collection electrode 51 as shown in FIG. Here, since the fluorine atom has a property of being easily negatively charged, for example, only gas flows on the surface of the covering member 56 and is negatively charged by friction with the gas. For this reason, particles positively charged by the discharge unit 40 are easily adsorbed to the dust collection electrode 51.

  The composition ratio of carbon atoms to fluorine atoms in the resin material 57 is in the range of 99: 1 to 80:20. When the composition ratio of fluorine atoms in the resin material 57 is less than the above range, the amount of fluorine atoms appearing on the surface of the resin material 57 is small, so that sufficient charge cannot be obtained to promote the adsorption of particles. Further, when the composition ratio of fluorine atoms in the resin material 57 exceeds the above range, the charging efficiency of the resin material 57 is saturated. In addition, as the composition ratio of fluorine atoms in the resin material 57 increases, the resin material 57 becomes less likely to adhere to the conductive member 55 and the smoothness of the surface of the resin material 57 decreases, so the composition ratio of fluorine atoms is necessary. It is better not to be larger.

  The conductive member 55 is a member to which a voltage for attracting charged particles is applied. In the present embodiment, the conductive member 55 is grounded. In the present embodiment, conductive member 55 is made of aluminum. When the conductive member 55 is made of aluminum, the resin material 57 easily adheres to the conductive member 55. Further, the conductive member 55 may be made of stainless steel, for example. When the conductive member 55 is made of stainless steel, the resin material 57 can be easily attached to the conductive member 55 by treating the conductive member 55 with an acid, for example. Moreover, the material which comprises the electrically-conductive member 55 is not limited to the above material. The material constituting the conductive member 55 may be a conductive material to which the resin material 57 can be attached.

[Dust collection electrode manufacturing method]
Then, the manufacturing method of the dust collection electrode 51 which has said structure is demonstrated.

  First, a flat conductive member 55 constituting the dust collecting electrode 51 and a resin material 57 are prepared.

  The resin material 57 can be produced, for example, by polymerizing an acrylic monomer and a fluorine monomer. Here, the mixing ratio of the acrylic monomer and the fluorine monomer is appropriately determined so as to satisfy the composition ratio of the carbon atom and the fluorine atom.

  The resin material 57 is used in a state dissolved in a solvent. In the present embodiment, it is preferable to use an organic solvent having a boiling point of 120 ° C. or higher as the solvent. When a high boiling point organic solvent is used, it takes a relatively long time for the organic solvent to volatilize. Therefore, the surface of the resin material 57 can be smoothed until the organic solvent volatilizes. For example, by applying a resin material 57 dissolved in an organic solvent to a flat plate member arranged horizontally, the surface of the resin material 57 is naturally smoothed under the influence of gravity until the organic solvent volatilizes. Is done. In addition, as an organic solvent, propylene glycol, isopropyl alcohol, etc. can be used, for example.

  Next, a resin material 57 dissolved in a solvent is applied to the surface of the conductive member 55. And the dust collection electrode 51 which has the coating | coated member 56 comprised from the resin material 57 on the surface of the electrically-conductive member 55 can be manufactured by volatilizing the said solvent.

[Dust collector operation]
Then, operation | movement of the dust collector 1 mentioned above is demonstrated using drawing.

  FIG. 4 is a diagram showing an outline of the configuration and operation of the discharge unit 40 and the dust collection unit 50 of the dust collector 1 according to the present embodiment.

  As shown in FIG. 4, when a voltage is applied between the discharge electrode 42 and the low potential electrode 41 of the discharge unit 40, a corona discharge is generated between the discharge electrode 42 and the low potential electrode 41. In addition, a gas is guided between the discharge electrode 42 and the low potential electrode 41 from the outside of the dust collector 1 by the fan 10. Here, when the particle 100 contained in the gas passes between the discharge electrode 42 and the low potential electrode 41, the particle 100 is positively charged by the ionized gas generated by the corona discharge.

  The positively charged particles 100 are continuously guided between the dust collection electrode 51 and the counter electrode 52 of the dust collection unit 50 by the fan 10. Here, since the dust collection electrode 51 is grounded and a positive voltage is applied to the counter electrode 52, an electric field is generated between the dust collection electrode 51 and the counter electrode 52. Therefore, the positively charged particles 100 introduced between the dust collection electrode 51 and the counter electrode 52 receive a force directed to the dust collection electrode 51 by an electric field and are adsorbed on the surface of the dust collection electrode 51. Further, as described above, the dust collection electrode 51 has the covering member 56 including the resin material 57, and the fluorine atoms appearing on the surface of the resin material 57 are negatively charged. To the surface of the resin material 57 is promoted. For this reason, the collection efficiency of the particles 100 can be improved by collecting dust using the dust collection electrode 51 according to the present embodiment, compared to collecting dust using an electrode that does not have the covering member 56. .

[Modification]
Subsequently, a modification of the present embodiment will be described with reference to the drawings. In this modification, the configuration of the covering member is different from that of the above embodiment.

  FIG. 5 is a cross-sectional view showing an outline of the structure of the dust collection electrode 51A according to this modification.

  As shown in FIG. 5, the dust collecting electrode 51 </ b> A of the present modified example is similar to the dust collecting electrode 51 of the above embodiment, and the covering member 56 </ b> A that covers at least a part of the conductive member 55. Have In this modification, the covering member 56 </ b> A includes a main material 58 that is a main constituent material, and a powder 57 </ b> A that is made of the resin material 57 similar to that of the above-described embodiment and is scattered in the main material 58. Here, in the covering member 56A, the powder 57A composed of the resin material 57 is mixed in a proportion of 5 parts or more and 50 parts or less with respect to 100 parts of the main material 58 in mass parts.

  The main material 58 is a material that covers the conductive member 55, and also functions as a binding material for binding the powder 57A. The main material 58 is made of resin. As the main material 58, for example, an acrylic resin may be used.

  Also in the dust collecting electrode 51A according to this modification, the powder 57A that is made of the resin material 57 is mixed at a predetermined ratio, and therefore the powder 57A appears on the surface of the covering member 56A. Here, since the powder 57A is composed of the resin material 57, as described above, fluorine atoms appear on the surface of the powder 57A. Therefore, since fluorine atoms exist on the surface of the covering member 56A, the surface of the covering member 56A is negatively charged by friction with gas. For this reason, also in the dust collection electrode 51A according to this modification, the positively charged particles 100 are easily adsorbed similarly to the dust collection electrode 51 according to the above embodiment.

[Effects, etc.]
As described above, the dust collector 1 according to the present embodiment is the dust collector 1 that collects the particles 100 suspended in the gas, and the discharge electrode 42 that charges the particles 100 by generating a discharge. And a dust collecting electrode 51 that collects charged particles 100 and a fan 10 that guides gas toward the discharge electrode 42 and the dust collecting electrode 51. The dust collecting electrode 51 includes a conductive member 55 and a covering member 56 that covers at least a part of the conductive member 55, and the covering member 56 includes a resin material 57. The resin material 57 has an acrylic skeleton in the main chain and has a fluorine functional group as a side chain, and the composition ratio of carbon atoms to fluorine atoms in the resin material 57 is 99: 1 to 80:20. Within range.

  As a result, fluorine atoms contained in the resin material 57 appear on the surface of the covering member 56 that covers at least a part of the dust collecting electrode 51. Since fluorine atoms appearing on the surface of the covering member 56 are negatively charged by friction with gas or the like, adsorption of the particles 100 positively charged by the discharge electrode 42 to the surface of the covering member 56 is promoted. For this reason, according to the dust collector 1 which concerns on this Embodiment, the collection efficiency of the particle | grains 100 in gas can be improved, without enlarging the dimension of the dust collection electrode 51. FIG.

  Further, in the present embodiment, the covering member 56A includes a main material 58 that is a main constituent material, and a powder 57A that is composed of a resin material 57 and is scattered in the main material 58, and 100 parts of the main material 58. On the other hand, the powder 57A composed of the resin material 57 may be mixed at a ratio of 5 parts or more and 50 parts or less.

  Even with such a configuration, since fluorine atoms appear on the surface of the covering member 56A, the collection efficiency of the particles 100 in the gas can be improved. Moreover, according to this structure, the main material 58 can be selected comparatively freely. For this reason, for example, a material that easily adheres to the conductive member 55 can be selected as the main material 58.

  Further, the main material 58 included in the covering member 56A may be made of an acrylic resin, for example.

  The conductive member 55 may be made of aluminum.

  Thereby, the conductive member 55 to which the covering member 56 containing acrylic resin or the like as a main component is easily attached can be formed.

(Other variations)
As mentioned above, although the dust collector which concerns on this invention was demonstrated based on embodiment, this invention is not limited to said embodiment.

  For example, the dust collector 1 according to the above embodiment employs a configuration in which the low potential electrode 41 facing the discharge electrode 42 and the counter electrode 52 facing the dust collection electrode 51 are used. The configuration of the device is not limited to this. For example, a dust collector having a configuration that does not use the low potential electrode 41 and the counter electrode 52 may be used. A dust collector according to another modification having the above configuration and its operation will be described with reference to the drawings.

  FIG. 6 is a diagram showing an outline of the configuration and operation of the discharge electrode 42 and the dust collection electrode 51 of a dust collector according to another modification.

  As shown in FIG. 6, the low potential electrode 41 and the counter electrode 52 are not used in the dust collector according to this modification. In the dust collector according to this modification, a voltage is applied between the discharge electrode 42 and the dust collection electrode 51, and corona discharge is generated between the discharge electrode 42 and the dust collection electrode 51. That is, in the dust collector according to this modification, corona discharge is generated between the discharge unit including the discharge electrode 42 and the dust collection unit including the dust collection electrode 51. In the dust collector according to this modification, the particles 100 introduced between the discharge electrode 42 and the dust collection electrode 51 are positively charged. The positively charged particles 100 receive a force toward the dust collection electrode 51 by the electric field generated between the discharge electrode 42 and the dust collection electrode 51, and are adsorbed on the surface of the dust collection electrode 51. Similarly to the above-described embodiment, the dust collection electrode 51 has the covering member 56 including the resin material 57, and the fluorine atoms appearing on the surface of the resin material 57 are negatively charged. Adhesion of the charged particles 100 to the surface of the resin material 57 is promoted. Furthermore, according to this modification, the number of electrodes can be reduced as compared with the above embodiment.

  Moreover, in the said embodiment, although the shape of each electrode of the dust collector 1 is flat form, the shape of each electrode is not restricted to this. For example, a cylindrical dust collection electrode and a rod-shaped discharge electrode arranged inside the dust collection electrode may be used.

  In the above embodiment, the surfaces of the dust collection electrodes 51 and 51A are charged by friction between the gas and the dust collection electrodes 51 and 51A. However, the surfaces of the dust collection electrodes 51 and 51A are rubbed with other members. You may charge by.

  In addition, any combination of the components and functions in the embodiment and the modification can be arbitrarily combined without departing from the gist of the present invention, and the form obtained by making various modifications conceived by those skilled in the art with respect to the embodiment and the modification. The embodiment realized by the above is also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Dust collector 10 Fan 42 Discharge electrode 51, 51A Dust collector electrode 55 Conductive member 56, 56A Cover member 57 Resin material 57A Powder 58 Main material 100 Particles

Claims (5)

A dust collector that collects particles suspended in a gas,
A discharge electrode for charging the particles by generating a discharge;
A dust collecting electrode for collecting the charged particles;
A fan for guiding the gas toward the discharge electrode and the dust collection electrode,
The dust collection electrode has a conductive member, and a covering member that covers at least a part of the conductive member,
The covering member includes a resin material,
The resin material has an acrylic skeleton in the main chain, and has a fluorine functional group as a side chain,
The composition ratio of the carbon atom and the fluorine atom in the resin material is in a range from 99: 1 to 80:20. The covering member includes a main material which is a main constituent material, and a powder made of the resin material and scattered in the main material, and is made of the resin material for 100 parts of the main material. The dust collector according to claim 1, wherein the powder is mixed at a ratio of 5 parts or more and 50 parts or less. The dust collector according to claim 2, wherein the main material is made of an acrylic resin. The dust collector according to claim 1, wherein the particles are positively charged. The dust collector according to any one of claims 1 to 4, wherein the conductive member is made of aluminum.

Images