WO2016136270A1 - 電気集塵装置 - Google Patents

電気集塵装置 Download PDF

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Publication number
WO2016136270A1
WO2016136270A1 PCT/JP2016/001042 JP2016001042W WO2016136270A1 WO 2016136270 A1 WO2016136270 A1 WO 2016136270A1 JP 2016001042 W JP2016001042 W JP 2016001042W WO 2016136270 A1 WO2016136270 A1 WO 2016136270A1
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WO
WIPO (PCT)
Prior art keywords
electrode plate
dust
charging
charging unit
conductive fiber
Prior art date
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PCT/JP2016/001042
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English (en)
French (fr)
Japanese (ja)
Inventor
洋 細野
篤史 片谷
光 村田
水野　彰
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2017501952A priority Critical patent/JP6837192B2/ja
Priority to KR1020177017785A priority patent/KR102481567B1/ko
Publication of WO2016136270A1 publication Critical patent/WO2016136270A1/ja

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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
    • 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
    • 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
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings

Definitions

  • the present invention relates to an electrostatic precipitator that charges airborne particles in the air and collects them by electrostatic force.
  • this type of electrostatic precipitator applies a DC high voltage to the discharge electrode of the charging unit, generates a positive corona or a negative corona, and imparts a positive or negative charge to the dust passing through the charging unit. Is charged.
  • Patent Document 1 Widely known in general (for example, see Patent Document 1).
  • FIG. 20 schematically shows the electrode arrangement of the dust collection unit of the electric dust collector.
  • the electrostatic precipitator includes a charging unit 104 and a dust collecting unit 105.
  • the ventilation direction is the direction from the charging unit 104 to the dust collection unit 105 (from left to right in FIG. 20).
  • a DC high voltage of +11 kV and +8.3 kV is supplied from the DC high voltage power source 109 to the charging unit 104 and the dust collecting unit 105, respectively.
  • the charging unit 104 includes a protruding discharge electrode 104A and a ground electrode plate 104B.
  • a DC high voltage of +11 kV is applied to the discharge electrode 104A, and a positive corona discharge is generated in the space between the discharge electrode 104A and the ground electrode plate 104B.
  • Positive ions generated by the positive corona give a positive charge to dust (not shown) in the space, and the dust is positively charged.
  • the charged dust is collected on the ground electrode plate 105B by electrostatic force due to a strong electric field formed between the load electrode plate 105A and the ground electrode plate 105B in the dust collection unit 105 in the subsequent stage (dust collection principle).
  • a general dust collector for a tunnel ventilation facility using corona discharge has a power consumption per air volume of about 110 W / (m 3 / s). As a result, the power consumption per 1 m 3 / min is about 2 W.
  • the power consumption is 3.5 W when the processing air volume is 0.3 m 3 / min, and the power consumption per 1 m 3 / min is about 12 W (for example, Patent Document 2).
  • the present invention does not generate corona discharge or generates minute corona discharge to charge dust, thereby reducing power generation at the charging unit and reducing the electricity cost associated with power consumption.
  • a plurality of load electrodes and a plurality of ground electrodes are alternately arranged in parallel between the inflow portion and the outflow portion of the gas containing dust.
  • a conductive fiber is provided on one side of the load electrode or one side of the ground electrode, the conductive fiber is provided between each electrode plate of the load electrode and the ground electrode, and a charging unit that applies a high voltage to the load electrode is provided.
  • Dust is deposited on the conductive fiber by a gradient force, and the accumulated dust is charged by induction charging to the same polarity as the conductive fiber deposited at the time of scattering, and the scattered charged dust is different in polarity. Dust can be collected by the opposing ground electrode or load electrode.
  • the electrostatic precipitator according to the present invention generates a discharge from the end of the conductive fiber by applying a high voltage to the load electrode, and discharges the charged portion to the area of the electrode by 3 per 1 mm 2. It may be in the range of ⁇ 10 ⁇ 5 to 60 ⁇ 10 ⁇ 5 ⁇ A.
  • the ratio of the length of the conductive fiber to the electrode plate interval between the load electrode and the ground electrode is set to 0.01 to 0.3, and the electric field strength between the electrode plate between the load electrode and the ground electrode is set to 0.3 to 0.3. It may be 1 kV / mm.
  • the conductive fiber may be carbon fiber.
  • a plurality of dust collector load electrode plates and a plurality of dust collector ground electrode plates are alternately arranged in parallel between the inflow and outflow portions of the gas containing dust, and a high voltage is applied to the dust collector load electrode plates.
  • a plurality of dust collecting portion load electrode plates and a plurality of dust collecting portion ground electrode plates may be used as the dust collecting portion, and the dust collecting portion may be provided on the downstream side of the charging portion.
  • FIG. 1 is a perspective view of the inside of a tunnel ventilation facility using an electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 2 is a view showing a section 2-2 in FIG.
  • FIG. 3 is a view showing a 3-3 cross section of FIG.
  • FIG. 4 is an internal perspective view of the upper surface of the tunnel ventilation facility using the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 5 is a configuration diagram of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 6 is a conceptual diagram showing the electrode plate arrangement of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 7 is a graph showing the current with respect to the applied voltage of the charging unit of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 1 is a perspective view of the inside of a tunnel ventilation facility using an electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 2 is a view showing a section 2-2 in FIG.
  • FIG. 8 is a conceptual diagram showing the electric field region of the charging unit of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 9A is a conceptual diagram illustrating the movement of dust accumulation in the charging unit of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 9B is a conceptual diagram showing the movement of dust re-scattering in the charging unit of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 10 is a graph showing the dust collection rate of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 11 is a graph showing the dust collection rate when the applied voltage of the electrostatic precipitator according to the first embodiment of the present invention is zero.
  • FIG. 9A is a conceptual diagram illustrating the movement of dust accumulation in the charging unit of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 9B is a conceptual diagram showing the movement of dust re-scattering in the charging unit of the electrostatic precipitator according to the
  • FIG. 12 is a graph showing the dust collection rate when the voltage application of the electrostatic precipitator according to the first embodiment of the present invention is applied only to the charging unit.
  • FIG. 13 is a graph showing the dust collection rate when the voltage application of the electrostatic precipitator according to the first embodiment of the present invention is limited to the dust collection unit.
  • FIG. 14 is a graph showing a comparison of the dust collection rates of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 15 is a graph showing the dust collection rate with respect to the charging unit applied voltage of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 16 is a graph showing the dust collection rate with respect to the charged portion discharge current of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 17 is a graph showing the dust collection rate with respect to the power consumption of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 18 is a perspective view illustrating the configuration of the charging unit of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 19 is a perspective view illustrating the configuration of the electrostatic precipitator according to the first embodiment of the present invention.
  • FIG. 20 is a configuration diagram of a charging unit and a dust collection unit of a conventional electric dust collector.
  • the electrostatic precipitator 3 of the present embodiment is installed in a ventilation air passage 4 from the ventilation suction port 2 to the ventilation discharge port 6 above the tunnel main line 1,
  • a ventilation fan 5 is installed on the downstream side of the air passage 4.
  • the ventilation inlet 2, the electric dust collector 3, the ventilation air passage 4, and the ventilation fan 5 constitute one system.
  • a ventilation air passage having a similar configuration is provided on both sides of the ventilation air passage 4 shown in FIG. 4, and the common ventilation outlet 6 is an outlet in which three systems are combined. Yes.
  • an electrostatic precipitator 7 and a high pressure generating panel 8 and a control panel 9 for operating the precipitator 3 and the electrostatic precipitator 7 are installed. Has been.
  • the electric dust collector 3 includes a dust collection unit 11 including a charging unit 12 and a dust collection unit 13 in a casing 10, and a damper 31 on the windward side of the dust collection unit 11.
  • a cleaning pipe 32 is provided in the upper part on the leeward side, and a wiring terminal box 33 is provided in the lower part on the leeward side.
  • a plurality of dust collection units 11 are provided in the casing 10.
  • the damper 31 is closed when the electrode plates constituting the charging unit 12 and the dust collecting unit 13 are washed with water, and has a function of preventing water scattering to the outside of the casing 10.
  • In-machine piping for cleaning which is made of stainless steel or resin.
  • the wiring terminal box 33 is a box that temporarily receives the wiring from the high voltage generating board 8 and applies a high voltage from the terminal of the box to the charging unit 12 and the dust collecting unit 13.
  • the dust collecting unit 11 includes a charging unit 12 in which charging unit grounding electrode plates 14 as grounding electrodes and charging unit load electrode plates 15 as load electrodes are alternately arranged in parallel, and a dust collecting unit grounding.
  • a dust collector 13 in which electrode plates 16 and dust collector electrode plates 17 are alternately arranged in parallel, a charging unit high-voltage power supply 18 for charging the charger unit electrode plate 15, and a collector unit for charging the dust collector unit electrode plate 17. It consists of a dust part high-voltage power supply 19.
  • a charging unit 12 is disposed on the windward side, and a dust collecting unit 13 is disposed on the leeward side.
  • the charging unit 12 has a depth (length) L1 of 40 mm and a height (not shown) of 32 mm between the charging unit ground electrode plate 14 and the charging unit load electrode plate 15.
  • the electrode plate interval D1 of the partial electrode plate 15 is 10 mm.
  • the dust collection unit 13 has a dust collection unit ground electrode plate 16 and a dust collection unit load electrode plate 17 having a depth (length) L2 of 280 mm and a height (not shown) of 90 mm.
  • the electrode plate interval D2 between the plate 16 and the dust collecting portion load electrode plate 17 is 10 mm.
  • six dust collecting portion grounding electrode plates 16 and six dust collecting portion load electrode plates 17 are used.
  • the electrode plate material of the charging unit 12 and the dust collecting unit 13 is, for example, SUS304, and the plate thickness is about 0.4 to 0.6 mm. Any material can be used as the material.
  • the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 are provided with a conductive fiber portion 20 in which a large number of conductive fibers are implanted on one side, and either the charging unit ground electrode plate 14 or the charging unit load electrode plate 15 facing each other. One of them is arranged so as to have the conductive fiber portion 20.
  • the conductive fiber portion 20 is composed of a number of activated carbon fibers having a wire diameter of about 5 to 10 ⁇ m and a length of about 0.1 to 3 mm, for example. Bonded to the electrode plate 15.
  • the ratio of the length of the conductive fiber portion 20 to the electrode plate interval D1 between the charging portion load electrode plate 15 and the charging portion grounding electrode plate 14 is preferably 0.01 to 0.3. If this ratio is 0.01 or more, that is, if the length of the conductive fiber portion 20 in this embodiment is 0.1 mm or more, the gradient force generated at the end of the conductive fiber portion 20 becomes strong, and the dust collection rate Can be high.
  • the ratio of the length of the conductive fiber portion 20 to the electrode plate interval D1 is 0.3 or less, that is, the length of the conductive fiber portion 20 in this embodiment is 3 mm or less, the charging portion grounding electrode plate 14 Since the frequency of occurrence of a spark (local short circuit) between the charging part load electrode plates 15 is reduced, the dust collection rate can be increased.
  • the conductive fiber portion 20 is preferably a carbon fiber. According to this configuration, since the specific gravity is lighter than that of metal or the like while having conductivity, the apparatus can be reduced in weight.
  • Rooting is performed using electrostatic force.
  • the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 coated with the conductive adhesive are arranged to face each other at an interval of about 20 to 30 mm, and a high voltage of about DC-5 kV is applied to the charging unit load electrode plate 15.
  • the conductive fibers are planted, but a method other than planting may be used.
  • what processed the conductive fiber part 20 into the nonwoven fabric form may be adhered and fixed.
  • the conductive fiber portion 20 is composed of activated carbon fibers having fine pores on the surface.
  • the conductive fiber portion 20 may not be activated carbon fibers as long as it has a conductive fibrous shape.
  • a resin fiber mixed with a conductive material such as carbon, a fine metal wire, or a resin fiber plated with a conductive material such as metal for example, a resin fiber mixed with a conductive material such as carbon, a fine metal wire, or a resin fiber plated with a conductive material such as metal.
  • the conductive adhesive is composed mainly of, for example, silver as a conductive material and silicon as a binder, and is cured at about 180 ° C.
  • the volume resistivity after curing is 2.5 ⁇ 10 ⁇ 6 ⁇ ⁇ cm. It is.
  • the conductive material may be other than silver as long as it has conductivity. For example, gold or copper.
  • the binder may be other than silicon as long as it has thermosetting properties.
  • epoxy resin urethane resin, acrylic resin and the like.
  • the charging unit 12 is divided into two in the wind flow direction, and six charging unit grounding electrode plates 14 and six charging unit load electrode plates 15 are used in the front and rear stages, respectively.
  • the conductive fiber portions 20 of the charging portion grounding electrode plate 14 and the charging portion load electrode plate 15 are arranged in opposite directions in the former stage and the latter stage.
  • the distance B between the two parts is 40 mm, for example.
  • FIG. 7 shows the current value with respect to the applied voltage of the charging unit 12 when the conductive fiber part 20 is present (solid line in ⁇ ) and when it is not present (dotted line in ⁇ ).
  • the current value shown in FIG. 7 is a value after performing aging for 3 hours (time elapsed in a state where a high voltage is applied). Since the charging unit grounding electrode plate 14, the charging unit load electrode plate 15, and the conductive fiber unit 20 have burrs at the end of processing, the current value changes due to the influence of the burrs. Due to aging, the current value decreases with time, and after a certain time has elapsed, the current also settles to a substantially constant value.
  • the applied voltage of the dust collecting portion 13 without the conductive fiber portion 20 is set to ⁇ 9 kV.
  • the tunnel main line 1 operates the ventilation fan 5 and sucks contaminated air containing dust from the ventilation suction port 2 in order to prevent contamination caused by dust generated by traveling of the vehicle, and the ventilation air passage 4.
  • the air is collected by the electric dust collector 3 and the air from which the dust is removed from the ventilation discharge port 6 is discharged out of the tunnel main line 1 (see FIG. 1).
  • the electrostatic precipitator 3 charges the dust in the contaminated air sucked from the ventilation inlet 2 by the charging unit 12 of the dust collecting unit 11, and the dust collecting unit grounding electrode 16 and the dust collecting unit load electrode of the dust collecting unit 13. It adheres to the plate 17 and removes dust from the contaminated air (see FIG. 6).
  • the feature of the present embodiment is that the charging unit high-voltage power supply 18 is used, but the corona discharge is not generated or the fine corona discharge is used to attach and charge the dust by the gradient force and the induction charging. This will be described with reference to FIGS.
  • FIG. 8 is an enlarged view of a portion X in FIG. 6.
  • the charging unit high-voltage power supply 18 applies a negative high voltage to the charging unit load electrode plate 15 to charge the charging unit ground electrode plate 14.
  • Electric lines of force directed toward the part load electrode plate 15 act.
  • the electric lines of force are curved so that the conductive fiber portions 20 on the charging portion ground electrode plate 14 and the charging portion load electrode plate 15 are dense, thereby forming an unequal electric field.
  • the gradient force refers to a force that the dielectric receives so as to move in the direction of a stronger electric field in an unequal electric field, and the charged portion grounding electrode plate 14 in which the electric lines of force are dense in FIG. And acts toward the conductive fiber portion 20 on the charging portion load electrode plate 15.
  • FIG. 9A schematically shows the behavior of dust in the conductive fiber portion 20 of the charging portion ground electrode plate 14, but the dust also has the same behavior in the conductive fiber portion 20 of the charging portion load electrode plate 15.
  • the dust flying to the charging unit 12 is attracted to the conductive fiber 20a on the windward side of the conductive fiber unit 20 of the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 by a gradient force. Is deposited.
  • the dust that has not been attracted to the conductive fibers 20a of the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 passes through the region of the first unequal electric field, and the charging unit ground electrode plate 14 and the charging unit load electrode.
  • the conductive fibers 20a of the plate 15 are attracted to the conductive fibers 20b on the leeward side (right side in FIG. 9A) and are deposited.
  • the dust that has not been attracted to the conductive fiber 20b of the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 passes through the region of the second unequal electric field, and the charging unit ground electrode plate 14 and the charging unit load.
  • the conductive fibers 20b of the electrode plate 15 are attracted and deposited on the conductive fibers 20c on the leeward side.
  • the dust that has not been attracted to the conductive fiber 20c of the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 passes through the third unequal electric field region, and the charging unit ground electrode plate 14 and the charging unit load.
  • the conductive fibers 20c of the electrode plate 15 are attracted to the conductive fibers 20d on the leeward side and are deposited.
  • the charged portion grounding electrode plate 14 and the charged portion load electrode plate 15 shown in FIG. 6 have a dense electric field in the vicinity of the conductive fiber portion 20 to form an unequal electric field. Attract and deposit.
  • the dust deposited on the conductive fiber portion 20 of the charging portion ground electrode plate 14 is deposited on the conductive fiber portion 20 of the positive polarity, charging portion load electrode plate 15.
  • the dust that had been charged is negatively charged and re-scatters.
  • the re-scattered and charged particles are collected by electrostatic force on the surface of the dust collector ground electrode plate 16 or the dust collector electrode plate 17 of the dust collector 13 shown in FIG.
  • the charging unit grounding electrode plates 14 and the charging unit load electrode plates 15 having the conductive fiber portions 20 on at least one side are alternately arranged in parallel, whereby the dust can be charged by induction charging.
  • parallel includes substantially parallel inclined several degrees.
  • the dust is attracted and deposited on the conductive fiber portion 20 of the charging portion ground electrode plate 14 and the charging portion load electrode plate 15, and a large amount of dust is accumulated at the time of scattering.
  • the charged portion ground electrode plate 14 or the charged portion load electrode plate 15 can be charged by induction charging to the same polarity.
  • the scattered charged dust can be collected by the dust collector grounding electrode plate 16 or the dust collector electrode plate 17 having different polarities of the dust collector 13.
  • dust can be charged and collected without generating corona discharge only by applying a high voltage between the charging portion ground electrode plate 14 and the charging portion load electrode plate 15 or by minute corona discharge. Therefore, it is possible to reduce the generation of electric power in the charging unit 12 and to reduce the electricity cost associated with power consumption.
  • the dust collection unit 13 uses electrostatic force generated in parallel plates, which has a lower pressure loss than a filter type by physical contact and also has a dust collection rate. high.
  • FIG. 10 is a graph showing the dust collection rate with respect to the wind speed when the applied voltage of the charging unit 12 in the present embodiment is ⁇ 2.4 kV.
  • the dust collection rate was measured by measuring the number concentration of dust in the air using a particle counter, and the dust collection rate was calculated from the concentration ratio between the inlet side and the outlet side of the dust collection unit 11 by the following formula.
  • Dust collection rate (1-outlet side number concentration / inlet side number concentration) x 100 (%) As shown in FIG. 10, it has a dust collection rate of 10% or more without consuming electric power at a wind speed of 11 m / s or less, and particularly a dust collection rate of 40% or more at a wind speed of 2 m / s.
  • FIG. 11 is a graph showing the dust collection rate when the applied voltage of the charging unit 12 and the dust collection unit 13 is 0 kV for comparison.
  • the dust collection rate when no voltage is applied is less than 5%.
  • FIG. 12 is a graph showing the dust collection rate when a voltage is applied only to the charging unit 12.
  • FIG. 13 is a graph showing the dust collection rate when a voltage is applied only to the dust collection unit 13.
  • the combined dust collection rate c% in the case where the charging unit 12 with the dust collection rate a% and the dust collection unit 13 with the dust collection rate b% are arranged in series is as follows. It can be calculated by the formula.
  • FIG. 14 shows the combined dust collection rate (dotted line) and charging obtained from the dust collection rate when the voltage is applied only to the charging unit 12 and the dust collection rate when the voltage is applied only to the dust collection unit 13 using the above formula. It is the graph which compared the dust collection rate (solid line) at the time of applying a voltage to both the part 12 and the dust collection part 13.
  • the measured dust collection rate is higher than the synthetic dust collection rate obtained by calculation.
  • the dust collecting unit 13 applies a high voltage to the parallel plate, so that the dust once contacted or collected by the charging unit 12 is re-scattered in a state of being charged by induction charging, and this is the subsequent dust collecting unit. This is thought to be due to the effect of electrostatically collecting by the strong electric field in 13 parallel plates.
  • FIG. 15 is a graph showing the dust collection rate with respect to the applied voltage of the charging unit 12 in the present embodiment.
  • the wind speed is 2 m / s
  • the solid line in FIG. 15 represents the average value during five measurements.
  • the dust collection rate As shown in FIG. 15, there is an upward tendency of the dust collection rate when the applied voltage of the charging unit 12 is around ⁇ 3 kV. Further, the dust collection rate is significantly increased at ⁇ 4 kV or more (absolute value of 4 kV or more), and at ⁇ 7 kV, the dust collection rate is 80% or more.
  • the electric field strength of the charging unit 12 at ⁇ 3 kV is 0.3 kV / mm because the electrode plate interval D1 between the charging unit ground electrode plate 14 and the charging unit load electrode plate 15 is 10 mm. . Further, the electric field strength of the charging unit 12 at ⁇ 4 kV in the present embodiment is 0.4 kV / mm.
  • the electric field strength between the electrode plates of the charging portion load electrode plate 15 and the charging portion grounding electrode plate 14 is preferably 0.3 to 1 kV / mm. If the electric field strength is 0.3 kV / mm or more, an improvement in the dust collection rate due to the gradient force can be expected. Further, if the electric field strength is 1 kV / mm or less, the frequency of occurrence of a spark (local short circuit) between the charging unit grounding electrode plate 14 and the charging unit load electrode plate 15 is reduced, so that the dust collection rate can be increased. it can.
  • FIG. 16 is a graph showing the dust collection rate with respect to the discharge current of the charging unit 12 in the present embodiment.
  • the wind speed is 2 m / s, and the discharge current is changed by slightly varying the voltage applied to the charging unit 12 in the vicinity of ⁇ 7 kV.
  • the discharge current when the electrode plate interval D1 (see FIG. 6) of the charging unit 12 is 10 mm is about 20 ⁇ A
  • the discharging current of the charging unit 12 is 1 to 20 ⁇ A, that is, per 1 mm 2 of the electrode area.
  • the discharge current is preferably 3 ⁇ 10 ⁇ 5 to 60 ⁇ 10 ⁇ 5 ⁇ A.
  • the discharge current per 1 mm 2 of electrode area is 3 ⁇ 10 ⁇ 5 ⁇ A or more, that is, if the discharge current of the charging unit 12 is 1 ⁇ A or more in this embodiment, the gradient force generated at the end of the conductive fiber portion 20 is strong. Thus, the dust collection rate can be increased.
  • the discharge current per 1 mm 2 of electrode area is 60 ⁇ 10 ⁇ 5 ⁇ A or less, that is, if the discharge current of the charging unit 12 is 20 ⁇ A or less in this embodiment, the charging unit ground electrode plate 14 and the charging unit load electrode plate Since the frequency of occurrence of sparks (local short circuit) between 15 is reduced, the dust collection rate can be increased.
  • the discharge current per 1 mm 2 of the electrode area is 3 ⁇ 10 ⁇ 5 to 15 ⁇ 10 ⁇ 5 ⁇ A, that is, the discharge current of the charging unit 12 in the present embodiment is 1 to 5 ⁇ A. According to this configuration, power consumption is extremely small, and the dust collection rate can be set to 70% or more.
  • FIG. 17 is a graph showing the dust collection rate with respect to the power consumption in the present embodiment.
  • the wind speed is 2 m / s, and the power consumption is changed by slightly varying the voltage applied to the charging unit 12 in the vicinity of ⁇ 7 kV.
  • the power consumption is 15 mW or more and the dust collection rate is 80% or more.
  • the processing air volume in the present embodiment is 0.46 m 3 / min from the cross-sectional area (height 32 mm ⁇ electrode plate interval 10 mm ⁇ electrode plate number 12 sheets) ⁇ wind speed (2 m / s).
  • the power consumption per 1 m 3 / min is about 0.03 W, which is about 1 / 100th of the power consumption of the electrostatic precipitator of the prior art document 2, for example.
  • the charging unit 12 has a plurality of charging unit grounding electrode plates 14 and charging unit load electrode plates 15 arranged at regular intervals by an electrode plate interval holding tube 22. Each electrode plate is penetrated by a plurality of electrode plate holding rods 23 and supported and fixed in parallel between the charging unit frames 21 at both ends.
  • the charging unit frame 21 is provided with an insulator 24, which supports a voltage application component including the charging unit load electrode plate 15 and is electrically insulated from a grounding component including the charging unit grounding electrode plate 14.
  • the dust collecting unit 13 includes the dust collecting unit ground electrode plate 16 and the dust collecting unit electrode plate 17 having approximately the same number as the charging unit ground electrode plate 14 and the charging unit load electrode plate 15. Are arranged in parallel.
  • the dust collector 13 has a plurality of dust collector grounding electrode plates 16 and dust collector load electrode plates 17 between the dust collector frames 25 at both ends, similarly to the charging unit 12. It is arranged at a constant interval by a plate interval holding tube 22 and is supported and fixed in parallel by using four electrode plate holding bars 23 for each electrode plate.
  • the charging unit 12 and the dust collecting unit 13 are provided.
  • the dust collecting unit 13 may not be provided and only the charging unit 12 may be configured.
  • sharp projections are provided at opposite positions of the charging part load electrode plate 15 and the charging part grounding electrode plate 14, respectively, and dust that flows in by using corona discharge is supplementarily supplied. It may be configured to promote charging.
  • the grounding electrode and the load electrode of the charging unit 12 and the dust collecting unit 13 are flat electrode plates, but a fiber or rod electrode may be used.
  • the electrostatic precipitator according to the present invention does not generate corona discharge or generates minute corona discharge, thereby reducing power generation in the charging unit and enabling power saving. It is useful in a wide range.

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PCT/JP2016/001042 2015-02-27 2016-02-26 電気集塵装置 WO2016136270A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017501952A JP6837192B2 (ja) 2015-02-27 2016-02-26 電気集塵装置
KR1020177017785A KR102481567B1 (ko) 2015-02-27 2016-02-26 전기 집진 장치

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-038459 2015-02-27
JP2015038459 2015-02-27
JP2015-183961 2015-09-17
JP2015183961 2015-09-17

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JP6301033B1 (ja) * 2017-06-29 2018-03-28 三菱電機株式会社 集塵デバイスおよび空気調和機
JP2018162689A (ja) * 2017-03-24 2018-10-18 三菱重工業株式会社 凝集装置及びこれを備えた排ガス処理装置
CN111655378A (zh) * 2018-01-15 2020-09-11 三菱日立电力系统环保株式会社 电集尘装置
US20220258087A1 (en) * 2018-10-10 2022-08-18 Alink Co.,Ltd Conductive filter unit, conductive filter module including conductive filter unit, and fine dust removal system including conductive filter module

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JP2018162689A (ja) * 2017-03-24 2018-10-18 三菱重工業株式会社 凝集装置及びこれを備えた排ガス処理装置
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US11833464B2 (en) * 2018-10-10 2023-12-05 Alink Co., Ltd Conductive filter unit, conductive filter module including conductive filter unit, and fine dust removal system including conductive filter module

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