WO2021176881A1 - 集塵装置 - Google Patents
集塵装置 Download PDFInfo
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- WO2021176881A1 WO2021176881A1 PCT/JP2021/002341 JP2021002341W WO2021176881A1 WO 2021176881 A1 WO2021176881 A1 WO 2021176881A1 JP 2021002341 W JP2021002341 W JP 2021002341W WO 2021176881 A1 WO2021176881 A1 WO 2021176881A1
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- electrode
- dust collector
- gas pipe
- collection
- collecting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/025—Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/49—Collecting-electrodes tubular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/51—Catch- space electrodes, e.g. slotted-box form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/53—Liquid, or liquid-film, electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/70—Applications of electricity supply techniques insulating in electric separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/86—Electrode-carrying means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles
Definitions
- the present invention relates to a dust collector.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2012-170869
- Patent Document 2 Japanese Patent Application Laid-Open No. 2011-245249
- Patent Document 3 Japanese Patent Application Laid-Open No. 2009-166006
- the dust collector may include a gas pipe, a plurality of collecting portions, and a connecting electrode.
- the gas to be treated may flow from the upstream side to the downstream side.
- the plurality of collection parts may be provided in the gas pipe.
- the plurality of collecting units may collect the target particles contained in the gas to be treated.
- the connecting electrode may be connected to a plurality of collecting portions.
- Each of the plurality of collectors may have a tubular outer electrode.
- the gas to be processed may pass through the internal space of the tubular outer electrode.
- Each of the plurality of collectors may have an inner electrode.
- the inner electrode may be arranged coaxially with the outer electrode in the internal space.
- the plurality of collectors may be arranged in parallel within the cross section of the gas pipe.
- the connecting electrode may be connected to the inner electrode of each of the plurality of collectors.
- the connecting electrode may be arranged on the downstream side of the plurality of collecting portions.
- connection electrode may have a grid portion.
- the grid portion may be provided with electrodes in a grid pattern.
- the grid portion and each inner electrode may be connected.
- the diameter of the electrodes provided in a grid pattern on the connection electrodes may be larger than the diameter of the inner electrodes.
- the dust collector may further include a sealed portion.
- the sealing portion may seal the space between the collecting portions in the plurality of collecting portions.
- the sealing portion may be provided at the upstream end of the plurality of collecting portions.
- connection electrode and the wall of the gas pipe may be larger than the inner diameter of the outer electrode.
- the length of at least one outer electrode in the axial direction may be different from that of the other outer electrodes.
- the outer electrode arranged at the center in the cross section of the gas pipe may be longer than the other outer electrodes.
- Each outer electrode may have the same position at the upstream end.
- the wall of the gas pipe may be provided with a through hole through which the connection electrode passes.
- the dust collector may further include an accommodating portion.
- the accommodating portion may be arranged outside the gas pipe.
- the accommodating portion may accommodate the end of the connecting electrode that has passed through the through hole.
- the accommodating portion may support the end of the connecting electrode.
- the through hole may be arranged on the downstream side of the plurality of collection portions.
- the dust collector may further include an atmospheric pressure maintaining unit.
- the air pressure maintenance unit may maintain the air pressure in the accommodating unit higher than the air pressure in the gas pipe.
- the radius of the through hole may be larger than the inner diameter of the outer electrode.
- the dust collector may include a first collection unit group and a second collection unit group.
- the first collection unit group may include a plurality of collection units.
- the plurality of collection parts may be provided in the gas pipe.
- the plurality of collectors may be arranged in parallel within the cross section of the gas pipe.
- the second collection unit group may be provided on the upstream side of the first collection unit group in the gas pipe.
- the second collection group may include a plurality of collection units.
- the plurality of compensators may be arranged in parallel within the cross section of the gas pipe.
- the dust collector may include a first connection electrode.
- the first connecting electrode may be arranged on the downstream side of the first collecting unit group.
- the first connecting electrode may be connected to each inner electrode in the first collection group.
- the dust collector may include a second connecting electrode.
- the second connecting electrode may be arranged between the second collection group and the first collection group.
- the second connecting electrode may be connected to each inner electrode in the second collection group.
- FIG. 1 It is a perspective sectional view which shows the structural example of the dust collector 1 which concerns on one Embodiment of this invention. It is a figure which shows an example of the YZ cross section of a dust collector 1. It is a figure which shows the structural example of the collecting part 110. It is a figure which shows an example of the XY cross section of the collection part 110 shown in FIG. It is a figure which shows an example of the XY cross section of the dust collector 1 along the aa'line of FIG. It is a figure which shows an example of the XY cross section of the dust collector 1 along the bb'line of FIG. It is a figure of the XY cross section which shows another example of a dust collector 1.
- FIG. 1 is a perspective sectional view showing a configuration example of a dust collector 1 according to an embodiment of the present invention.
- the dust collector 1 is an electric dust collector.
- the dust collector 1 charges and collects particles such as particulate matter (PM) and black carbon (BC) contained in the gas to be treated.
- the gas to be treated is, for example, exhaust gas emitted from an engine of a ship or the like, but is not limited to this.
- the dust collector 1 may be used in combination with a scrubber device that removes particles such as dust by spraying a liquid on the gas to be treated.
- a scrubber device that removes particles such as dust by spraying a liquid on the gas to be treated.
- the particles of the gas to be treated may be further removed by the scrubber device.
- the particles of the gas to be treated may be further removed by the dust collector 1.
- the dust collector 1 includes a gas pipe 100 through which the gas to be treated flows from the upstream side to the downstream side, a plurality of collection units 110 for collecting target particles, and a connection electrode 120 connected to the plurality of collection units 110. To be equipped.
- the gas to be processed flows in a predetermined direction (Z-axis direction in FIG. 1).
- the gas pipe 100 may be provided with an upstream flange portion 101 and a downstream flange portion 102 so that the gas pipe 100 can be attached in the middle of the piping path of the gas to be processed.
- the gas pipe 100 includes a main body 103 between the upstream flange 101 and the downstream flange 102.
- the plurality of collection units 110 collect target particles contained in the gas to be processed.
- the number of the plurality of collecting portions 110 to be arranged is not limited to the case of FIG.
- Each of the plurality of collecting portions 110 includes an inner electrode 10 and an outer electrode 20.
- the outer electrode 20 is a tubular metal electrode through which the gas to be processed passes through the internal space.
- the inner electrode 10 is a metal electrode arranged coaxially with the outer electrode 20 in the inner space.
- the plurality of collecting portions 110 are arranged in parallel in the cross section of the gas pipe 100. With such a configuration, it is possible to secure the amount of processing gas while reducing the pressure loss when the gas to be processed passes through the dust collector 1.
- An in-line type dust collector may be configured by arranging a plurality of collecting portions 110 in parallel in the cross section of the gas pipe 100.
- the in-line type may mean a configuration in which the collecting unit 110 is arranged in the gas pipe 100.
- the collecting portion 110 maintains and secures the distance between the electrodes (gap length) in the coaxial cylindrical shape, unlike the parallel plate electrode provided with the thorns. Since the inner electrode 10 and the outer electrode 20 are formed in a coaxial cylindrical shape, the inner electrode 10 and the outer electrode 20 can be manufactured by lathe processing. Therefore, it is easy to secure the dimensional accuracy, and it is possible to accurately secure the required distance between the electrodes in the circumferential direction.
- a plurality of collecting portions 110 having a coaxial cylindrical electrode structure are parallelized.
- parallelizing the plurality of collection units 110 it is possible to realize a collection capacity capable of sufficiently treating the exhaust gas from the engine of an actual ship or the like.
- connection electrode 120 is made of a conductive material such as metal.
- the connecting electrode 120 is connected to each inner electrode 10 of the plurality of collecting portions 110.
- the inner electrode 10, which is a plurality of high-voltage electrodes, can be collectively supported by one connection electrode 120.
- the connection between the connection electrode 120 and each of the inner electrodes 10 may include welding, screwing, connection by a connecting member such as a joint, and the case of being integrally cast.
- connection electrode 120 includes a portion formed in a grid pattern along the XY plane.
- the connection electrode 120 is arranged downstream of the plurality of collection portions 110 with respect to the flow of the gas to be processed.
- the wall of the gas pipe 100 is provided with at least two through holes 104a and 104b through which the end of the connection electrode 120 passes.
- the through hole 104a and the through hole 104b may be provided on the side walls facing each other in the gas pipe 100.
- the through holes 104a and 104b are arranged on the downstream side of the plurality of collecting portions 110.
- the dust collector 1 includes at least two accommodating portions 130a and 130b.
- the accommodating portions 130a and 130b are arranged outside the gas pipe 100.
- the accommodating portion 130a accommodates one end of the connection electrode 120 that has passed through the through hole 104a and supports one end of the connection electrode 120.
- the accommodating portion 130b accommodates the other end of the connection electrode 120 that has passed through the through hole 104b and supports the other end of the connection electrode 120.
- the accommodating portion 130a may include a support portion 132a and an accommodating chamber 133a.
- the support portion 132a supports the end portion of the connection electrode 120.
- the support portion 132a is an insulator in one example.
- the accommodation chamber 133a accommodates the support portion 132a.
- the accommodation chamber 133a partitions the support portion 132a from the external space.
- the support portion 132a may be fixed to the side surface of the gas pipe 100 or the inner surface surface of the storage chamber 133a.
- the accommodating portion 130b includes a support portion 132b and an accommodating chamber 133b.
- the accommodating portion 130b is configured in the same manner as the accommodating portion 130a. Therefore, the repetitive description will be omitted.
- the connecting electrode 120 is arranged downstream of the plurality of collecting portions 110 with respect to the flow of the gas to be processed. According to such a configuration, it is possible to reduce the contamination of the connection electrode 120. When conductive PM adheres to the connection electrode 120, the connection electrode 120 becomes substantially thick, and spark discharge may occur frequently without ensuring the inequality that is a characteristic of corona discharge.
- the connection electrode 120 even if the PM has low conductivity, when the PM adheres to or is deposited on the connection electrode 120, the deposited PM is polarized and causes a discharge called back discharge, which may cause sparks frequently. There is sex. According to this example, by reducing the contamination of the connection electrode 120 by PM, spark discharge can be avoided and corona discharge can be stably generated.
- the through holes 104a and 104b are arranged on the downstream side of the plurality of collecting portions 110, it is possible to reduce that the inside of the accommodating portions 130a and 130b is contaminated. As a result, it is possible to prevent the support portions 132a and 132b from being soiled and the insulating properties of the support portions 132a and 132b from being impaired as much as possible. Therefore, it is possible to prevent spark discharge at the support portions 132a and 132b.
- the dust collector 1 may further include a sealing portion 140 that seals the space between adjacent collecting portions in the plurality of collecting portions 110.
- the sealing portion 140 prevents the gas to be treated from escaping to the downstream side through the gap between the adjacent collecting portions.
- the cross-sectional area of the internal space of the outer electrode 20 in one collecting portion 110 arranged in the main body 103 is S, and the number of a plurality of collecting portions 110 arranged in parallel in the cross section of the gas pipe 100 is defined as S.
- S ⁇ n the sum (S ⁇ n) of the cross-sectional area S of the internal space of the n duty is more than the cross-sectional area S g of the inner space of each pipe are respectively connected to the upstream side flange portion 101 and the downstream flange portion 102 It may be configured to be.
- the cross-sectional area of the internal space of the body 103 and S a, and the area of sealing portions 140 are sealed in the XY plane and S r, S a -S r may be configured such that the above S g ..
- the cross-sectional area S a of the main body 103 is larger than the cross-sectional area S g of each pipe connected to the upstream flange portion 101 and the downstream flange portion 102, respectively. This makes it possible to reduce the pressure loss when the gas to be treated passes through the collection unit 110.
- Each cross-sectional area S, S g, S a is the cross-sectional area of each portion on a plane cut perpendicular to the longitudinal direction (the flow direction of untreated gas).
- FIG. 2 is a diagram schematically showing an example of a YZ cross section of the dust collector 1.
- FIG. 2 shows a YZ cross section passing through the support portions 132a and 132b in FIG. 1, but for convenience of explanation, the number of the plurality of collection portions 110 is shown to be smaller than that shown in FIG. There is.
- the plurality of collecting portions 110-1, 110-2, 110-3, and 110-4 may be fixed to a common plate-shaped sealing portion 140 by welding or the like. ..
- the edge portion of the sealed portion 140 may be fixed to the inner wall of the gas pipe 100 constituting the flue by welding or the like. That is, the plurality of collecting portions 110 may be fixed in the gas pipe 100 through a common sealing portion 140.
- the sealing portion 140 is provided at the upstream end of the plurality of collecting portions 110. As a result, it is possible to prevent the gas to be processed from entering the space between the plurality of collecting portions 110.
- the present invention is not limited to this case, and the sealing portion 140 may be provided at the downstream end portion of the plurality of collecting portions 110, and is provided at each of the upstream side and downstream end portions of the plurality of collecting portions 110, respectively. May be done.
- the dust collector 1 of this example includes an atmospheric pressure maintaining unit 150.
- the air pressure maintaining unit 150 maintains the air pressure in the accommodating chamber 133a in the accommodating unit 130a higher than the air pressure in the gas pipe 100.
- the atmospheric pressure maintaining unit 150 may introduce an inert gas such as nitrogen into the accommodating unit 130a, or may introduce air. As a result, it is possible to prevent the gas to be processed from flowing into the storage chamber 133a through the through hole 104a.
- the air pressure maintaining unit 150 maintains the air pressure in the accommodating chamber 133b in the accommodating unit 130b higher than the air pressure in the gas pipe 100. As a result, it is possible to prevent the gas to be processed from flowing into the storage chamber 133b through the through hole 104b.
- the atmospheric pressure maintaining unit 150 it is possible to prevent particles in the gas to be treated from adhering to the support portions 132a, 132b and the like, which are insulators and the like, and to prevent an undesired electric discharge from occurring in the insulator and the like.
- the dust collector 1 may be provided with a voltage application unit 152 that applies a voltage to the connection electrode 120.
- the voltage applied by the voltage application unit 152 is applied to the inner electrode 10 in each collection unit 110 through the connection electrode 120.
- the connection electrode 120 mechanically fixes the inner electrode 10.
- the inner electrode 10 extends in one direction (in this example, the vertical direction).
- One end (upper end) of the inner electrode 10 is fixed to the lattice portion where the electrodes are provided in a grid pattern in the connection electrode 120.
- each inner electrode 10 and the connection electrode 120 of this example may form a cantilever beam in which one end of the inner electrode 10 is a fixed end and the other end is a free end.
- the diameter W2 of the electrodes provided in a grid pattern on the connection electrode 120 is larger than the diameter W1 of the inner electrode 10. This prevents the connection electrode 120 from being distorted or bent.
- the diameter W2 of the electrode may be the thickness in the Z-axis direction.
- the radius R1 of the through holes 104a and 104b may be larger than the inner diameter Rb of the cylindrical outer electrode 20. This makes it possible to prevent discharge between the gas pipe 100 provided with the through holes 104a and 104b and the connection electrode 120.
- Each collection unit 110 may have a collection electrode 30 in addition to the inner electrode 10 and the outer electrode 20. Next, the collecting unit 110 will be described.
- FIG. 3 is a diagram showing a configuration example of the collection unit 110.
- the outer electrode 20 has a rod shape having a length in a predetermined direction (Z-axis direction in FIG. 3), and an internal space 40 is provided inside the rod shape.
- the outer electrode 20 of this example has a cylindrical shape.
- the internal space 40 is connected to the external space at both ends of the outer electrode 20 in the Z-axis direction. At the end in the Z-axis direction, the gas to be processed is introduced into the internal space 40.
- the longitudinal direction of the outer electrode 20 is the Z-axis direction, and the two orthogonal axes perpendicular to the Z-axis are the X-axis and the Y-axis.
- the outer electrode 20 of this example surrounds the internal space 40 with a plate-shaped metal electrode.
- the gas to be processed passes through the internal space 40.
- the gas to be processed passes through the internal space 40 along the Z-axis direction.
- the collecting unit 110 collects particles contained in the passing gas to be processed.
- the inner electrode 10 is a metal electrode arranged coaxially with the outer electrode 20 in the inner space 40. That is, the inner electrode 10 is arranged at the center of the internal space 40 on the XY plane perpendicular to the Z-axis direction.
- the center of the interior space 40 may be the geometric center of gravity of the interior space 40 on the XY plane.
- the center of the internal space 40 is the center of the circle.
- the inner electrode 10 has a linear shape parallel to the Z-axis direction.
- the shape of the inner electrode 10 on the XY surface is preferably circular.
- the inner electrode 10 may or may not have a cavity inside.
- the distance between the inner electrode 10 and the outer electrode 20 on the XY plane is uniform over the entire Z-axis direction.
- a reference potential is applied to the outer electrode 20.
- the reference potential is, for example, the ground potential.
- a predetermined high potential higher than the potential of the outer electrode 20 is applied to the inner electrode 10.
- Each collecting unit 110 collects charged particles in a predetermined region by using Coulomb force or the like.
- the collecting unit 110 of this example collects charged particles in the outer region of the outer electrode 20.
- the collecting unit 110 of this example further includes a collecting electrode 30.
- the collection electrode 30 is a tubular metal electrode having a length in the Z-axis direction, which is arranged so as to surround the outer electrode 20. In the Z-axis direction, the collection electrode 30 and the outer electrode 20 may have the same length.
- a potential lower than that of the inner electrode 10 is applied to the collecting electrode 30.
- the same potential as that of the outer electrode 20 may be applied to the collecting electrode 30.
- the collection electrode 30 and the outer electrode 20 may both be grounded. In this case, the collection electrode 30 and the outer electrode 20 form a ground electrode.
- a collection space 50 is provided between the collection electrode 30 and the outer electrode 20. Further, the plate-shaped metal electrode of the outer electrode 20 is provided with a plurality of outer electrode through holes 22. The outer electrode through hole 22 connects the internal space 40 and the collection space 50.
- the charged particles existing in the internal space 40 move in the direction from the inner electrode 10 to the outer electrode 20 due to the Coulomb force and the ionic wind generated by the corona discharge.
- the charged particles pass through the outer electrode through hole 22 and are collected in the collection space 50.
- the arrangement of the collection space 50 is not limited to this example.
- the collection space 50 may be arranged downstream of the outer electrode 20. That is, the charged particles contained in the gas to be processed after passing through the internal space 40 may be collected downstream of the outer electrode 20.
- the cylindrical inner electrode 10 and the cylindrical outer electrode 20 are coaxially arranged without providing a plurality of protrusions on the electrodes. Therefore, it is possible to suppress the concentration of the electric field at a specific location, and it is possible to suppress the spark discharge.
- the gas to be treated may have a high temperature. As an example, a gas to be treated at a maximum of 400 ° C. may be introduced into the collection unit 110 for a ship. As described above, even when the temperature change becomes large, it is possible to prevent the distance between the inner electrode 10 and the outer electrode 20 from becoming non-uniform because the collecting portion 110 has a cylindrical coaxial structure. Therefore, spark discharge can be suppressed.
- FIG. 4 is a diagram showing an example of an XY cross section of the collecting unit 110.
- the inner electrode 10, the outer electrode 20, and the collection electrode 30 are hatched with diagonal lines. In other figures, hatching of these electrodes may be omitted.
- the inner electrode 10 is arranged at the center 12 on the XY plane of the internal space 40. That is, on the XY surface, the center 12 of the internal space 40 overlaps with the inner electrode 10. On the XY plane, it is preferable that the center of the inner electrode 10 and the center 12 of the internal space 40 coincide with each other.
- the outer diameter of the inner electrode 10 is Ra.
- the outer diameter of the inner electrode 10 is the radius of the inner electrode 10 on the XY plane. That is, the outer diameter of the inner electrode 10 is the distance between the center of the inner electrode 10 and the outer peripheral end 14 of the inner electrode 10.
- the outer peripheral end 14 of the inner electrode 10 of this example is a circle along the outer circumference of the inner electrode 10.
- the inner diameter of the outer electrode 20 is Rb.
- the inner diameter of the outer electrode 20 is the radius of the inner wall 24 of the outer electrode 20 on the XY plane. That is, the inner diameter of the outer electrode 20 is the distance between the center 12 and the inner wall 24 of the outer electrode 20.
- the outer electrode 20 of this example has an inner wall 24 in contact with the inner space 40 and an outer wall 26 in contact with the collection space 50. Further, the outer electrode through hole 22 of the outer electrode 20 penetrates the outer electrode 20 from the inner wall 24 to the outer wall 26.
- the ratio Ra / Rb of the outer diameter Ra of the inner electrode 10 to the inner diameter Rb of the outer electrode 20 is smaller than 1 / e.
- the coaxially arranged tubular electrodes have the best insulation efficiency when the ratio Ra / Rb described above is equal to 1 / e (see, for example, the following literature. "High voltage engineering", Asakura. Bookstore, by Teruya Kono, pp.28-29).
- the ratio Ra / Rb it is preferable to increase the insulation between the inner wiring and the outer shield, so it is preferable to design the ratio Ra / Rb to be equal to 1 / e.
- the electric field is concentrated in the vicinity of the inner electrode 10, and the electric field strength distribution from the inner electrode 10 to the outer electrode 20 becomes non-uniform.
- Such a state is called an inequality system.
- the electric field is concentrated in the vicinity of the inner electrode 10, so that corona discharge is likely to occur.
- the collecting unit 110 of this example it becomes easy to uniformly generate a corona discharge in the entire internal space 40 at 360 degrees around the inner electrode 10 on the XY surface. Further, also in the Z-axis direction, it becomes easy to uniformly generate the corona discharge in the entire internal space 40. Therefore, the particles contained in the gas to be processed passing through the internal space 40 can be efficiently charged.
- the electric field strength changes according to the distance from the protrusion. For this reason, it may be difficult to charge particles that pass through a region away from the protrusions, such as the center between two protrusions.
- the ratio Ra / Rb may be smaller than 1 / (2e).
- the ratio Ra / Rb may be smaller than 1 / (5e) and may be smaller than 1 / (10e).
- the outer diameter Ra of the inner electrode 10 is 1 mm or more and 10 mm or less.
- the outer diameter Ra of the inner electrode 10 may be 5 mm or less.
- the inner diameter Rb of the outer electrode 20 is 10 mm or more and 100 mm or less.
- the inner diameter Rb of the outer electrode 20 may be 50 mm or more.
- the distance d between the outer peripheral end 14 of the inner electrode 10 and the inner wall 24 of the outer electrode 20 may be 40 mm or less.
- the distance d corresponds to the difference Rb-Ra between the inner diameter Rb and the outer diameter Ra. If the distance d becomes too large, the electric field in the vicinity of the outer electrode 20 becomes weak, and it becomes difficult to charge the particles passing in the vicinity of the outer electrode 20.
- the distance d By setting the distance d to 40 mm or less, sufficient electric field strength can be secured in the entire internal space 40. Therefore, it becomes easy to charge all the particles passing through the internal space 40.
- the collecting unit 110 of this example further includes a combustion unit 60 that burns charged particles.
- the combustion unit 60 is, for example, a heater.
- the combustion unit 60 may be provided on the inner wall surface of the collection electrode 30.
- the inner wall surface of the collection electrode 30 is a wall surface of the collection electrode 30 facing the outer electrode 20.
- the combustion unit 60 may have an electrode that generates microwaves in the collection space 50.
- the combustion unit 60 may control the wavelength of the microwave so that the microwave in the collection space 50 becomes a standing wave. By generating a standing wave of microwaves, energy is concentrated on the mountain part of the standing wave, and it becomes easy to burn particles. By burning the charged particles, it is possible to prevent the collection space 50 from being filled with the charged particles.
- FIG. 5 is a diagram schematically showing an example of an XY cross section of the dust collector 1 along the line aa'of FIG.
- the connection electrode 120 of this example includes a plurality of stretched portions 121a and 121b, and a grid portion 122.
- the stretched portion 121a is an electrode that stretches from one side of the lattice portion 122 toward the through hole 104a.
- the stretched portion 121b is an electrode that stretches from the other side of the lattice portion 122 facing the one side toward the through hole 104a.
- the stretched portions 121a and 121b may be provided at positions facing each other with the lattice portion 122 interposed therebetween.
- the grid portion 122 is a portion where electrodes are provided in a grid pattern.
- the lattice portion 122 includes a frame portion 123 forming the contour of the lattice portion 122, and a plurality of first extending portions 124 (124-1, 124) extending in one direction in a region surrounded by the frame portion 123. -2, 124-3, 124-4) and a plurality of second stretched portions 125 extending in other directions in the region surrounded by the frame portion 123.
- the lattice portion 122 may have a straight portion extending linearly between the extending portions 121a and 121b.
- the pattern of the lattice portion 122 may be any pattern as long as the lattice portion 122 is connected to the inner electrode 10 of each collecting portion 110 and the lattice portion 122 can fix the position of the inner electrode 10, and is limited to the case of FIG. Not done.
- the diameter W3 of the electrodes provided in a grid pattern on the connection electrode 120 is larger than the diameter W1 of the inner electrode 10.
- the electrode diameter W3 may be the electrode width in the lateral direction in the XY plane.
- the electrode thickness W2 in the Z-axis direction of the electrode is also larger than the diameter W1 of the inner electrode 10.
- the distance Lc between the connection electrode 120 and the wall of the gas pipe 100 may be larger than the inner diameter (radius) Rb of the outer electrode 20. Further, the radius R1 of the through holes 104a and 104b is larger than the inner diameter (radius) Rb of the outer electrode 20. With such a configuration, it is possible to prevent discharge between the gas pipe 100 and the connection electrode 120.
- FIG. 6 is a diagram schematically showing an example of an XY cross section of the dust collector 1 along the line bb'of FIG.
- the inner electrode 10 and the sealing portion 140 are hatched with diagonal lines. In other figures, hatching of these electrodes may be omitted.
- the sealed portion 140 has a flat plate shape.
- the sealing portion 140 is provided with a plurality of openings 142 corresponding to the positions where the collecting portions 110 are attached.
- the edge of the opening 142 and the outer electrode 20 may be welded together.
- the opening 142 and the outer electrode 20 communicate with each other.
- the end of the collecting electrode 30 may be welded to the XY plane of the sealed portion 140.
- the sealing portion 140 covers the space between the end portion of the collection electrode 30 and the end portion of the outer electrode 20. Therefore, it is possible to prevent the gas to be processed from flowing into the collection space 50 (FIG. 4) between the collection electrode 30 and the outer electrode 20.
- the end edge of the sealed portion 140 can be joined to the inner surface of the gas pipe 100 by welding or the like. Therefore, the position of the collecting electrode 30 and the position of the outer electrode 20 can be firmly fixed via the sealing portion 140.
- FIG. 7 is a cross-sectional view of an XY showing another example of the dust collector 1.
- each collection unit 110 has an inner electrode 10 and an outer electrode 20, and does not have a collection electrode 30 and a combustion unit 60.
- the dust collector 1 shown in FIG. 7 includes a collection electrode 30 arranged so as to surround a plurality of outer electrodes 20 arranged in parallel. That is, a plurality of outer electrodes 20 are arranged in the region surrounded by one collection electrode 30.
- the shape and size of the outer edge of the collection electrode 30 may be substantially the same as the shape and size of the inner surface of the gas pipe 100.
- the collecting unit 110 may include a combustion unit 60 arranged so as to surround the plurality of outer electrodes 20 arranged in parallel.
- the combustion unit 60 may be a heater provided on the inner wall surface of the collection electrode 30. According to this example, the collection electrode 30 and the combustion unit 60 of the plurality of collection units 110 can be shared.
- connection electrode 120 has a lattice pattern different from that shown in FIG. According to the configuration shown in FIG. 7, one electrode is connected to one inner electrode 10 so as not to obstruct the flow of the gas to be processed.
- the present invention is not limited to this case, and as shown in FIG. 5, a lattice pattern in which a plurality of electrodes are connected to one inner electrode 10 can be adopted.
- Each outer electrode 20 is provided with an outer electrode through hole 22 shown in FIG. 4 or the like. Each outer electrode 20 may be welded to the sealing portion 140. Further, the outer electrodes 20 may be welded to each other. A charging material may be filled between the outer electrodes 20 so that no gap is formed between the outer electrodes 20.
- the filling material may be a conductive material such as metal, or may be an insulating material such as resin.
- FIG. 8 is a cross-sectional view of an XY showing another example of the dust collector 1.
- a case where two through holes 104a and 104b are provided on the side wall of the gas pipe 100 is shown.
- four through holes 104a, 104b, 104c, and 104d are provided on the side wall of the gas pipe 100.
- the through hole 104a and the through hole 104b may be provided on a pair of side walls facing the first direction (Y-axis direction) in the gas pipe 100.
- the through hole 104c and the through hole 104d may be provided on a pair of side walls facing the second direction (X-axis direction) in the gas pipe 100.
- the dust collector 1 includes four accommodating portions 130a, 130b, 130c, and 130d.
- the accommodating portions 130a, 130b, 130c, and 130d are arranged outside the gas pipe 100.
- the accommodating portion 130a and the accommodating portion 130b face each other in the Y-axis direction.
- the accommodating portion 130c and the accommodating portion 130d face each other in the X-axis direction.
- the configurations of the accommodating portions 130a, 130b, 130c, and 130d are the same as those of the accommodating portions 130a, 130b shown in FIG.
- the connection electrode 120 shown in FIG. 8 includes a grid portion 122 and a plurality of stretched portions 121a, 121b, 121c, and 121d extending from the grid portion 122.
- the stretched portions 121a and 121b are stretched along the Y-axis direction, respectively.
- the stretched portions 121c and 121d are stretched in the X-axis direction, respectively.
- the accommodating portion 130c accommodates and supports the end portion of the extending portion 121c that has passed through the through hole 104c.
- the accommodating portion 130d accommodates and supports the end portion of the extending portion 121d that has passed through the through hole 104d.
- connection electrode 120 is fixed in the first direction and the second direction different from the first direction, the distortion and bending of the connection electrode 120 can be further reduced. In particular, it is possible to prevent twisting of the connection electrode 120 centered on the Y axis.
- FIG. 9 is a YZ cross-sectional view schematically showing another example of the dust collector 1.
- at least one of the plurality of outer electrodes 20 has a different axial length from the other outer electrodes.
- the axial direction may be the longitudinal direction of the outer electrode 20 and may be the direction of the flow of the gas to be treated. In this example, the axial direction is the Z-axis direction.
- the outer electrode 20-3 arranged at the center in the XY cross section of the gas pipe 100 is longer than the other outer electrodes.
- the length L1 of the outer electrodes 20-3 is longer than the respective lengths L2 of the outer electrodes 20-2 and 20-4, and the respective lengths L2 of the outer electrodes 20-2 and 20-4 are The lengths of the outer electrodes 20-1 and 20-5 are longer than L3, respectively. That is, in this example, the length L1 of the outer electrode 20-3 arranged at the center in the XY cross section of the gas pipe 100 is the longest, and the length of the outer electrode 20 becomes shorter as it goes outward from the center. Become.
- the length L1 of the outer electrode 20-3 can be lengthened to increase the dust collecting power.
- the dust collector 1 of this example is not limited to this case, and the outer electrode 20-1 or 20-5 at the end is lengthened in the XY cross section of the gas pipe 100 at the position after the gas pipe is bent. May be good.
- the positions of the upstream ends of the outer electrodes 20-1 to 20-5 are the same. If there is unevenness on the side on which the gas to be treated flows, the flow path may change. Therefore, by aligning the surfaces on the side on which the gas to be treated flows, the gas to be treated can easily enter the plurality of collecting portions 110 evenly.
- FIG. 10 is a YZ cross-sectional view schematically showing an example of the dust collector 2.
- the dust collector 2 of this example includes a first unit 4 and a second unit 5.
- the first unit 4 and the second unit 5 correspond to the dust collector 1 described with reference to FIGS. 1 to 9, respectively.
- the dust collector 2 includes a first collection unit group 112.
- the first collection unit group 112 has a plurality of collection units 110-1, 110-2, 110-3, 110-4, and 110-5 (collectively referred to as collection units 110).
- the plurality of collecting portions 110 are provided inside the gas pipe 100.
- the plurality of collecting portions 110 are arranged in parallel in the XY cross section of the gas pipe 100.
- the dust collector 2 includes a second collection unit group 212.
- the second collecting unit group 212 is provided on the gas pipe 100 on the upstream side of the first collecting unit group 112.
- the second collection unit group 212 has a plurality of collection units 210-1, 210-2, 210-3, 210-4, and 210-5 (collectively referred to as collection units 210).
- the plurality of collecting portions 210 are provided inside the gas pipe 100.
- the plurality of collecting portions 210 are arranged in parallel in the XY cross section of the gas pipe 100.
- the dust collector 2 includes a first connection electrode 120 and a second connection electrode 220.
- the first connection electrode 120 is arranged on the downstream side of the first collection unit group 112.
- the first connecting electrode 120 is connected to each inner electrode 10 in the first collecting unit group 112.
- the second connection electrode 220 is arranged between the second collection unit group 212 and the first collection unit group 112.
- the second connecting electrode 220 is connected to each inner electrode 10 in the second collecting unit group 212.
- the dust collector 2 may include first accommodating portions 130a and 130b and second accommodating portions 230a and 230b.
- the second accommodating portion 230a accommodates one end of the connection electrode 220 that has passed through the through hole 204a and supports one end of the connection electrode 220.
- the second accommodating portion 230b accommodates the other end of the connection electrode 220 that has passed through the through hole 204b and supports the other end of the connection electrode 220.
- the configuration of the first accommodating portions 130a and 130b is the same as the configuration shown in FIG. Therefore, the repetitive description will be omitted.
- the plurality of collecting parts 110 in the first collecting part group 112 and the plurality of collecting parts 210 in the second collecting part group 212 are separated from each other. Specifically, each outer electrode 20 in the first collection unit group 112 and each outer electrode 20 in the second collection unit group 212 are separated. Further, each collection electrode 30 in the first collection unit group 112 and each collection electrode 30 in the second collection unit group 212 are also separated.
- the collecting portion is divided into a collecting portion 110 and a collecting portion 210 and arranged in a plurality of stages, so that the length of the inner electrode 10 per one can be reduced. Can be shortened. Further, the length of the outer electrode 20 per one and the length of the collection electrode 30 per one can be shortened. Therefore, while maintaining the distance between the electrodes between the inner electrode 10 and the outer electrode 20 to avoid spark discharge, the collection ability can be substantially increased in the same manner as when the length of the collection portion in the longitudinal direction is increased. Can be enhanced.
- each inner electrode 10 in the first collecting unit group 112 and each inner electrode 10 in the second collecting unit group 212 do not have to be mechanically connected. However, not limited to this case, each inner electrode 10 in the first collecting unit group 112 and each inner electrode 10 in the second collecting unit group 212 may be connected. In this case as well, each outer electrode 20 in the first collection unit group 112 and each outer electrode 20 in the second collection unit group 212 may be separated. That is, at least one of the inner electrode 10 and the outer electrode 20 may be separated from the collecting part 110 of the first collecting part group 112 and the collecting part 210 in the second collecting part group 212.
- FIG. 11 is a YZ cross-sectional view schematically showing another example of the dust collector 2.
- the density of the grid (mesh) in the second connection electrode 220 located upstream of the first connection electrode 120 is sparser than the density of the grid in the first connection electrode 120.
- the inner diameter (radius) Rb of the outer electrode 20 of the second collecting unit group 212 located upstream of the first collecting unit group 112 is the inner diameter (radius) of the outer electrode 20 of the first collecting unit group 112. Greater than Rb. Due to these characteristics, it is possible to reduce the contamination of the upstream unit to which particles such as particulate matter (PM) and black carbon (BC) are likely to adhere.
- PM particulate matter
- BC black carbon
- FIG. 12 is a YZ cross-sectional view schematically showing another example of the dust collector 1.
- the longitudinal directions of the inner electrodes 10-1, 10-2, 10-3, and 10-4 of the plurality of collecting portions 110-1, 110-2, 110-3, and 110-4 are vertical. The direction is different from the direction.
- the inner electrode 10 and the outer electrode 20 are arranged so as to extend in the vertical direction.
- the dust collector 1 of the present invention is not limited to this case.
- the Z-axis direction is the vertical direction.
- the inner electrodes 10-1, 10-2, 10-3, and 10-4 of the plurality of collecting portions 110 extend in the Y-axis direction orthogonal to the vertical direction.
- the gas pipe 100 extends in the Y-axis direction. Therefore, the gas to be processed flows along the Y-axis direction.
- the dust collector 1 of this example includes a first connection electrode 120-1 and a second connection electrode 120-2.
- the first connection electrode 120-1 is connected to one ends of the inner electrodes 10-1, 10-2, 10-3, and 10-4 of the plurality of collecting portions 110 by welding or the like.
- the second connection electrode 120-2 is connected to the other ends of the inner electrodes 10-1, 10-2, 10-3, and 10-4 by welding or the like.
- a double-sided beam is configured in which both one end and the other end of the inner electrode 10-1 are fixed ends. As a result, it is possible to prevent the inner electrode 10 from bending due to gravity in the vertical direction, and it is possible to stably generate a corona discharge.
- the present invention is not limited to this case, and depending on the rigidity or length of the inner electrode 10, the second connection electrode 120-2 may be omitted and a cantilever structure may be adopted.
- the first connection electrode 120-1 is a connection electrode that is connected to each inner electrode 10 of the plurality of collection portions 110 and is arranged on the downstream side of the plurality of collection portions 110.
- the first connecting electrode 120-1 is arranged downstream of the plurality of collecting portions 110-1, 110-2, 110-3, and 110-4 (collectively referred to as collecting portions 110). Will be done.
- the second connection electrode 120-2 is arranged on the upstream side of the plurality of collecting portions 110.
- the dust collector 1 has at least four accommodating portions 130-1, 130-2, and 130-3, 130-4.
- the accommodating portions 130-1 and 130-2 function as a pair of accommodating portions.
- the accommodating portion 130-1 accommodates one end portion of the connection electrode 120-1 that has passed through the through hole 104-1 and supports one end portion of the connection electrode 120-1.
- the accommodating portion 130-2 accommodates the other end portion of the connection electrode 120-1 that has passed through the through hole 104-2 and supports the other end portion of the connection electrode 120-1.
- the through holes 104-1 and the through holes 104-2 are the same as the through holes 104a and 104b described above.
- the accommodating portion 130-1 includes a support portion 132-1 and an accommodating chamber 133-1
- the accommodating portion 130-2 includes a support portion 132-2 and an accommodating chamber 133-2.
- the configurations of the support portions 132-1 and 132-2 and the accommodation chambers 133-1 and 133-2 are the same as the configurations of the support portions 132a and 132b and the accommodation chambers 133a and 133b shown in FIG.
- the accommodating portion 130-3 accommodates one end portion of the connection electrode 120-2 that has passed through the through hole 104-3, and supports one end portion of the connection electrode 120-2.
- the accommodating portion 130-4 accommodates the other end portion of the connection electrode 120-2 that has passed through the through hole 104-4 and supports the other end portion of the connection electrode 120-2.
- the through holes 104-3 and the through holes 104-4 are the same as the through holes 104a and 104b described above.
- the accommodating portion 130-3 includes a support portion 132-3 and an accommodating chamber 133-3, and the accommodating portion 130-4 includes a support portion 132-4 and an accommodating chamber 133-4.
- the configurations of the support portions 132-3, 132-4 and the accommodation chambers 133-3 and 133-4 are the same as the configurations of the support portions 132a and 132b and the accommodation chambers 133a and 133b shown in FIG.
- first stretched part 125 ... second stretched part, 130 ... accommodating part, 132 ... support part 133 ⁇ ⁇ Containment chamber, 140 ⁇ ⁇ Sealed part, 142 ⁇ ⁇ Opening, 150 ⁇ ⁇ Pressure maintenance part, 152 ⁇ ⁇ Voltage application part, 204 ⁇ ⁇ Through hole, 210 ⁇ ⁇ Collection part, 212 ⁇ ⁇ Second collection Group, 220 ... connection electrode, 230 ... accommodating part
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Abstract
Description
特許文献1 特開2012-170869号公報
特許文献2 特開2011-245429号公報
特許文献3 特開2009-166006号公報
Claims (13)
- 処理対象ガスが上流側から下流側に流れるガス管と、
前記ガス管に設けられ、前記処理対象ガスに含まれる対象粒子を捕集する複数の捕集部と、
前記複数の捕集部と接続される接続電極と、
を備え、
前記複数の捕集部のそれぞれは、
内部空間を前記処理対象ガスが通過する筒状の外側電極と、
前記内部空間において前記外側電極と同軸に配置された内側電極と
を有し、
前記複数の捕集部は、前記ガス管の断面内において並列に配置されており、
前記接続電極は、前記複数の捕集部のそれぞれの前記内側電極と接続され、且つ、前記複数の捕集部よりも下流側に配置されている集塵装置。 - 前記接続電極は、電極が格子状に設けられた格子部を有し、
前記格子部と、それぞれの前記内側電極とが接続されている
請求項1に記載の集塵装置。 - 前記接続電極において前記格子状に設けられた前記電極の直径は、前記内側電極の直径よりも大きい
請求項2に記載の集塵装置。 - 前記複数の捕集部において、捕集部間の空間を密閉する密閉部を更に備える
請求項1から3のいずれか一項に記載の集塵装置。 - 前記密閉部は、前記複数の捕集部の前記上流側の端部に設けられる
請求項4に記載の集塵装置。 - 前記接続電極と、前記ガス管の壁との距離は、前記外側電極の内径よりも大きい
請求項1から5のいずれか一項に記載の集塵装置。 - 少なくとも一つの前記外側電極は、軸方向における長さが他の前記外側電極と異なる
請求項1から6のいずれか一項に記載の集塵装置。 - 複数の前記外側電極のうち、前記ガス管の断面において最も中央に配置された前記外側電極は、他の前記外側電極よりも長い
請求項7に記載の集塵装置。 - それぞれの前記外側電極は、上流側の端部の位置が同一である
請求項7または8に記載の集塵装置。 - 前記ガス管の壁には、前記接続電極が通過する貫通孔が設けられ、
前記ガス管の外部に配置され、前記貫通孔を通過した前記接続電極の端部を収容して、前記接続電極の端部を支持する収容部を更に備え、
前記貫通孔は、前記複数の捕集部よりも下流側に配置されている
請求項1から9のいずれか一項に記載の集塵装置。 - 前記収容部内の気圧を、前記ガス管内の気圧よりも高く維持する気圧維持部を更に備える
請求項10に記載の集塵装置。 - 前記貫通孔の半径は、前記外側電極の内径よりも大きい
請求項10または11に記載の集塵装置。 - 前記ガス管に設けられ、前記ガス管の断面内において並列に配置された複数の前記捕集部を有する第1の捕集部群と、
前記ガス管において前記第1の捕集部群よりも上流側に設けられ、前記ガス管の断面内において並列に配置された複数の前記捕集部を有する第2の捕集部群と、
前記第1の捕集部群よりも下流側に配置され、前記第1の捕集部群におけるそれぞれの前記内側電極と接続される第1の前記接続電極と、
前記第2の捕集部群と前記第1の捕集部群との間に配置され、前記第2の捕集部群におけるそれぞれの前記内側電極と接続される第2の前記接続電極と
を備える請求項1から12のいずれか一項に記載の集塵装置。
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EP21764002.8A EP3991849A4 (en) | 2020-03-02 | 2021-01-22 | DUST COLLECTOR |
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- 2021-01-22 KR KR1020227002833A patent/KR20220025014A/ko not_active Application Discontinuation
- 2021-01-22 CN CN202180004759.5A patent/CN114173931A/zh active Pending
- 2021-01-22 EP EP21764002.8A patent/EP3991849A4/en not_active Withdrawn
- 2021-01-22 JP JP2022505024A patent/JP7294521B2/ja active Active
- 2021-01-22 WO PCT/JP2021/002341 patent/WO2021176881A1/ja unknown
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Also Published As
Publication number | Publication date |
---|---|
KR20220025014A (ko) | 2022-03-03 |
JP7294521B2 (ja) | 2023-06-20 |
EP3991849A1 (en) | 2022-05-04 |
EP3991849A4 (en) | 2022-10-19 |
JPWO2021176881A1 (ja) | 2021-09-10 |
CN114173931A (zh) | 2022-03-11 |
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