WO2014006736A1 - Dispositif collecteur de poussière - Google Patents

Dispositif collecteur de poussière Download PDF

Info

Publication number
WO2014006736A1
WO2014006736A1 PCT/JP2012/067288 JP2012067288W WO2014006736A1 WO 2014006736 A1 WO2014006736 A1 WO 2014006736A1 JP 2012067288 W JP2012067288 W JP 2012067288W WO 2014006736 A1 WO2014006736 A1 WO 2014006736A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge
gas
electrode
dust
electrodes
Prior art date
Application number
PCT/JP2012/067288
Other languages
English (en)
Japanese (ja)
Inventor
一隆 富松
上田　泰稔
小嶋　勝久
加藤　雅也
Original Assignee
三菱重工メカトロシステムズ株式会社
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.)
Filing date
Publication date
Application filed by 三菱重工メカトロシステムズ株式会社 filed Critical 三菱重工メカトロシステムズ株式会社
Priority to PCT/JP2012/067288 priority Critical patent/WO2014006736A1/fr
Publication of WO2014006736A1 publication Critical patent/WO2014006736A1/fr

Links

Images

Classifications

    • 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
    • B03C3/02—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/50—Means for discharging electrostatic potential
    • 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
    • B03C2201/10—Ionising electrode has multiple serrated ends or parts
    • 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
    • B03C3/74—Cleaning the electrodes
    • B03C3/80—Cleaning the electrodes by gas or solid particle blasting

Definitions

  • the present invention relates to a dust collector for removing a collection target such as dust contained in a gas, and an operation method thereof.
  • a bag filter equipped with a filter cloth for treating dust (particulate matter) contained in gas is installed.
  • the gas include exhaust gas generated when burning coal and heavy oil, and air.
  • the above-mentioned bag filter is installed in the flue of power generation plants such as coal-fired and heavy oil-fired, industrial combustion equipment such as incinerators, etc., as well as a dust collector that is installed in the vicinity of devices that generate dust and performs environmental dust collection Also applies.
  • a pre-charged part may be installed in the flue upstream of the bag filter.
  • the preliminary charging unit is a charging unit including a discharge electrode and a ground electrode, and applies positive or negative charge to the dust in the gas by corona discharge to charge the dust.
  • the charged dust is collected on the filter cloth surface of the subsequent bag filter to form a charged dust layer.
  • fine particles entering the dust layer are attached to the coarse particles by electrostatic force. Thereby, clogging of the bag filter is reduced and the dust layer is also porous.
  • coarse particles easily settle during backwashing, as a result, an increase in the pressure loss of the bag filter can be suppressed. Further, since the fine particles adhere to the coarse particles due to electrostatic force, the slipping of the fine particles through the bag filter is reduced, and as a result, the dust can be collected with high efficiency.
  • Patent Document 1 discloses a two-stage electrostatic precipitator including a charging unit (preliminary charging unit) and a dust collection unit.
  • the dust collecting electrode (earth electrode) having a circular shape or an equivalent shape is arranged in a polygonal shape, and the discharge electrode is arranged at the center thereof.
  • One discharge electrode forms an electric field with a dust collecting electrode existing around the discharge electrode and charges the dust by corona discharge.
  • the dust charged by the charging unit is collected by the downstream dust collecting unit.
  • the dust collector of Patent Document 1 it is only necessary to supply the dust collector with a necessary minimum current that can prevent re-scattering. Therefore, it is possible to maintain high electric field strength without causing back ionization in the dust collector. And high dust collection efficiency can be obtained.
  • JP-A-60-209273 page 3, upper left column, line 11 to lower right column, line 3, FIG. 8)
  • Reverse ionization occurs when the electric field strength represented by the product ( ⁇ d ⁇ id) of the electrical resistivity ( ⁇ d) of the dust and the current density (id) flowing through the deposited dust layer exceeds the breakdown pressure of the dust layer. To do. Therefore, as one means for preventing the occurrence of reverse ionization, a method for eliminating the presence of dust itself, that is, preventing dust from accumulating on the dust collecting electrode is considered as one of the countermeasures.
  • An object of the present invention is to provide a dust collector capable of removing a collection target with high efficiency.
  • the present invention includes, in a flue through which a gas circulates, a precharge unit that discharges the collection target in the gas in order from the upstream side, and a bag filter that collects the collection target.
  • the preliminary charging unit includes a plurality of discharge electrodes arranged in a direction orthogonal to the gas flow direction in the gas flow path, and a direction orthogonal to the gas flow direction.
  • a plurality of ground electrodes arranged, the ground electrode has a curved surface with a continuous surface facing the upstream side of the gas, and the one discharge electrode has a plurality of protruding discharge portions.
  • the one discharge electrode is located between the two ground electrodes adjacent to each other when viewed from the upstream side of the gas, and the one discharge electrode and the two grounds closest to the one discharge electrode Corona discharge is generated between the surface of the pole facing the upstream side of the gas and the arc A surface precipitator corona discharge is inhibited by facing the downstream side of the electrode of the gas.
  • the collection target in the present invention is a gaseous substance such as dust or mercury contained in the combustion exhaust gas.
  • corona discharge is generated between the discharge electrode and the gas upstream surface of the earth electrode that is disposed on the gas downstream side of the discharge electrode and is closest to the discharge electrode.
  • the dust is charged.
  • the ground electrode is exposed to a high-speed gas. Then, even if dust adheres to the gas upstream surface of the earth electrode due to electric force, other dust collides and the earth electrode is arranged so that dust does not accumulate on the gas upstream surface of the earth. By doing so, the cleanliness of the gas upstream surface of the ground electrode is ensured.
  • charged dust is allowed to adhere to and accumulate on the gas downstream surface of the earth electrode.
  • a corona discharge is generated between one discharge electrode and the gas upstream side surface of the adjacent earth electrode. Corona discharge is suppressed on the gas downstream surface of the earth electrode.
  • the state of “corona discharge is suppressed” means that reverse ionization occurs, and the charge opposite to the discharge electrode is released from the ground electrode, and the charge of the dust is neutralized to greatly increase the charging capability. It means that it is suppressed to be lowered.
  • there is no discharge between the discharge electrode and the gas downstream surface of the ground electrode but it is acceptable to rarely generate back ionization to the extent that the charging capability is not significantly reduced. is there.
  • the precharge portion of the dust collector of the present invention when passing through the corona discharge generated between the discharge electrode and the ground electrode, Some are oxidized to a solid state. The substance that has become a solid state is further charged in the precharge portion. The substance in a solid state is transported to a subsequent bag filter and collected by the bag filter. In the present invention, fine particles adhere to the coarse particles by electrostatic force in the latter-stage bag filter, and an effect of reducing slipping of the fine particles in the bag filter can be obtained. For this reason, it becomes possible to collect the mercury etc. which became the solid state with high efficiency.
  • the discharge electrode has a cylindrical shape, and has one or a pair of discharge portions projecting outward in a cross section in a direction orthogonal to the axial direction, and the one or the pair of discharge portions are in the axial direction.
  • a plurality of the discharge portions are arranged in a direction perpendicular to the gas flow direction or toward the upstream side of the gas, and the discharge portion has a tip that is closer to the gas than the center of the ground electrode. It is preferable that the discharge electrode and the ground electrode are arranged so as to be located on the upstream side. By doing so, it is possible to prevent dust from adhering to the tip of the discharge part.
  • the ground electrode rows and the discharge electrode rows in a direction orthogonal to the gas flow direction are alternately arranged in a plurality of rows in the gas flow direction, and adjacent to each other in the gas flow direction.
  • the discharge electrode arranged between the poles is arranged in the center between the rows of earth electrodes, or is displaced toward the earth electrode rows on the gas downstream side. .
  • Charging performance can be improved by arranging a plurality of rows of ground electrodes and discharge electrodes.
  • the discharge electrode arranged between the earth electrodes is shifted to the center or the gas downstream side between the earth electrodes, the discharge gas is preferentially placed between the gas upstream surface of the earth electrode on the gas downstream side and the discharge electrode. Corona discharge occurs and stable discharge is continued.
  • corona discharge is suppressed between the ground electrode and the discharge electrode located on the gas upstream side. That is, corona discharge between the gas downstream surface of the earth electrode on which dust is deposited and the discharge electrode is suppressed. For this reason, high charging ability can be continued.
  • the precharge unit in the dust collector of the present invention dust is not deposited on the surface of the earth electrode that is the object of corona discharge of the discharge electrode, that is, the gas upstream surface of the earth electrode. For this reason, in the precharge part of this invention, dust can be charged, without generating reverse ionization, and high charging performance is shown. Moreover, the dust collector of this invention can be efficiently removed by oxidizing gaseous substances, such as mercury, which exist in combustion exhaust gas, and making it change into a solid state.
  • FIG. 1 is a schematic view of a dust collector according to the present embodiment.
  • the dust collector 1 is installed in a flue downstream of a boiler (combustion furnace) 2 and includes a preliminary charging unit 3 and a bag filter 5 in order from the gas upstream side.
  • the boiler 2 is a coal-fired boiler, for example.
  • a high voltage power source 4 is connected to the preliminary charging unit 3.
  • An induction fan 9 and a chimney 10 are installed in the downstream flue of the bag filter 5.
  • the flow rate of the flowing flue gas is in the range of 5 m / s to 20 m / s, preferably in the range of 10 m / s to 15 m / s.
  • the dust collector 1 is installed in a flue having the above flow velocity, or a damper or the like is installed upstream of the dust collector 1 and controlled at the above flow velocity.
  • FIG. 2 is a schematic diagram for explaining the electrode arrangement of the preliminary charging unit of the dust collector 1.
  • the preliminary charging unit 3 includes a plurality of ground electrodes 12a to 12d and a plurality of discharge electrodes 13a to 13c in an internal gas flow path 11.
  • the ground electrodes 12a to 12d are curved surfaces having a continuous surface (reference A in FIG. 2) facing the gas upstream side.
  • the shape of the surface (reference symbol B in FIG. 2) facing the gas downstream side of the earthing electrodes 12a to 12d is not particularly limited, but the earthing electrodes 12a to 12d are shaped so as not to have corners.
  • the ground electrodes 12a to 12d are shown in a cylindrical shape, but may be in an elliptical shape.
  • the ground electrodes 12a to 12d may be solid or hollow.
  • the earth electrodes 12a to 12d and the discharge electrodes 13a to 13c are made of a conductive material.
  • a wear-resistant material having conductivity such as a steel material subjected to quenching treatment (specifically, S45C, SUS420J1, SCM435, etc.), chill cast iron, high chromium cast iron, hardened chromium plating treatment material, and the like.
  • the surface of an inexpensive electrode material such as SS400 may be subjected to surface hardening treatment such as nitriding.
  • the earth electrodes 12a to 12d and the discharge electrodes 13a to 13c are structured so that they can be easily exchanged, and they are made of an inexpensive material with low wear resistance such as SS400, SUS304, SUS316, and periodically exchanged. It is also possible.
  • the discharge electrodes 13a to 13c of the present embodiment have a shape having a long axis such as a columnar shape, a prism shape, a rhomboid shape, or a flat plate shape.
  • FIG. 3 is a schematic cross-sectional view in a direction perpendicular to the axial direction of the discharge electrode 13 (13a to 13c) having a cylindrical shape.
  • the discharge electrode 13 has a discharge part protruding outward.
  • two discharge portions 14a and 14b are formed.
  • a plurality of discharge portions 14a and 14b are arranged and installed along the axial direction of the discharge electrodes 14a and 14b having a cylindrical shape.
  • the shape of the discharge parts 14a and 14b has a sharp tip shape.
  • each of the discharge portions 14a and 14b has a needle shape or a conical shape whose tip is processed into a tapered shape.
  • the discharge parts 14a and 14b are manufactured with a conductive material.
  • the discharge parts 14a and 14b may be subjected to the same wear resistance measures as the discharge electrodes 13a and 13b.
  • the tips of the discharge portions 14a and 14b are located upstream of the line passing through the center of the axis and orthogonal to the gas flow direction (the dashed line in FIG. It is attached to the discharge electrode 13 so that is located. Furthermore, as shown in FIG. 3, the tips of the discharge portions 14a and 14b are in a direction perpendicular to the gas flow direction (a direction in which the dashed line in FIG. 3 extends) or in a direction perpendicular to the gas flow direction. Directed upstream of the gas.
  • the discharge portions 14a and 14b attached to the discharge electrode 13 are 1 It may be one.
  • the plurality of ground electrodes 12a to 12d and the plurality of discharge electrodes 13a to 13c are arranged along a direction orthogonal to the gas flow direction.
  • the discharge electrode 13a is arranged so as to be shifted from each other so that it is located between the two ground electrodes 12a and 12b.
  • the discharge electrode 13b is positioned between the two ground electrodes 12b and 12c
  • the discharge electrode 13c is positioned between the ground electrodes 12c and 12d.
  • the discharge electrodes 13a to 13c and the ground electrodes 12a to 12d are arranged so that the tips of the discharge parts 14a and 14b are located on the gas upstream side from the centers of the ground electrodes 12a to 12d.
  • the discharge current to the gas upstream surface A of the ground electrodes 12a to 12d can be increased.
  • the discharge electrodes 13a to 13c and the ground electrodes 12a to 12d are arranged so that the tips of the discharge portions 14a and 14b are located on the gas upstream side of the gas upstream side ends of the ground electrodes 12a to 12d.
  • the gas downstream ends of the discharge electrodes 13a to 13c are drawn so as to be located on the gas upstream side of the gas upstream ends of the ground electrodes 12a to 12d.
  • the gas downstream side end of the discharge electrode may be positioned downstream of the gas upstream side of the ground electrode. This is to suppress the corona discharge to the gas downstream surface B of the ground electrodes 12a to 12d if the tips of the discharge portions 14a and 14b are located on the gas upstream side of the centers of the ground electrodes 12a to 12d. This is because you can
  • ground electrodes 12a and 12d adjacent to the wall 15 of the gas flow path and the wall 15 are preferably as close as possible to reduce the amount of gas that passes through.
  • Each of the ground electrodes 12a to 12d and the discharge electrodes 13a to 13c is connected to a high voltage power source 4 installed outside the precharge unit 3.
  • the high voltage power source is DC charged. Voltages having opposite polarities are applied to the ground electrodes 12a to 12d and the discharge electrodes 13a to 13c by a high-voltage power source.
  • the voltage application may be continuous, or may be on-off charge control (repeat voltage application and voltage application stop for a predetermined period).
  • the energy density between the discharge electrode and the earth electrode may be increased.
  • the bag filter 5 is configured by installing a filter cloth 6 for collecting dust in the gas in a dust chamber 8.
  • the filter cloth material of the bag filter is not particularly limited as long as it can be used in a combustion exhaust gas atmosphere.
  • PPS, PTFE, P84 or the like is adopted as the filter cloth material.
  • a supported filter cloth or the like may be employed.
  • an upper space 7 that is separated from the dust chamber 8 through the wall above the dust chamber 8 and the filter cloth 6 is provided.
  • the dust chamber 8 is connected to the precharging unit 3 by a flue, and the upper space 7 is connected to the induction fan 9 by the flue.
  • the combustion exhaust gas generated when the fuel is burned in the coal-fired boiler 2 contains gaseous substances such as dust and mercury.
  • the combustion exhaust gas is conveyed to the preliminary charging unit 3 of the dust collector 1.
  • a voltage is applied to the ground electrodes 12a to 12d and the discharge electrodes 13a to 13c of the preliminary charging unit 3.
  • a negative voltage is applied to the discharge electrodes 13a to 13c, and the ground electrodes 12a to 12d are connected to the ground.
  • corona discharge occurs between one discharge electrode 13a and the gas upstream surface A of the ground electrodes 12a and 12b closest to the discharge electrode 13a.
  • the discharge electrode 13a has two discharge portions 14a and 14b in cross section as shown in FIGS. 2 and 3
  • corona discharge occurs between the one discharge portion 14a and the gas upstream surface A of the ground electrode 12a.
  • Corona discharge occurs between the other discharge portion 14b and the gas upstream surface A of the ground electrode 12b.
  • a corona discharge is generated between one discharge electrode and the gas upstream surface of the ground electrode adjacent to the discharge electrode.
  • a collection object a gaseous substance such as dust and mercury
  • the dust is negatively charged.
  • the charged dust is conveyed to a bag filter on the gas downstream side.
  • Some charged dust is collected by the ground electrodes 12a to 12d. Since the combustion exhaust gas circulates at a high flow velocity in the above range, even if dust is collected by the electric force on the gas upstream surface A of the earth electrodes 12a to 12d, it is blown off by collision with other dust. That is, while the gas is flowing, the gas upstream surfaces of the ground electrodes 12a to 12d are cleaned by dust. Therefore, it is possible to secure a clean surface on the gas upstream side of the ground electrodes 12a to 12d where dust is hardly attached. As a result, corona discharge is continuously generated without back ionization on the gas upstream surface of the ground electrodes 12a to 12d.
  • mercury Some gaseous substances such as mercury are oxidized into solid substances when passing between the above corona discharges.
  • mercury combines with oxygen or chlorine in combustion exhaust gas to form mercury oxide (HgO) or mercury chloride (HgCl 2 ).
  • Mercury oxide and mercury chloride may exist as solids depending on the temperature of the flue gas flowing through the precharged part. Solidified mercury oxide and mercury chloride are charged when passing through the precharged portion.
  • Dust and solid substances (mercury oxide HgO, mercury chloride HgCl 2, etc.) flowing out from the precharge unit 3 flow into the dust chamber 8 of the bag filter 5 together with the combustion exhaust gas. Since the upper space 7 of the bag filter 5 is sucked by the attracting fan 9, an airflow flowing from the dust chamber 8 through the filter cloth 6 into the upper space 7 is generated. When the combustion exhaust gas passes through the filter cloth 6, charged dust and solid substances (mercury oxide HgO, mercury chloride HgCl 2, etc.) adhere to the outer surface of the filter cloth 6 and are collected.
  • the tips of the discharge portions 14a and 14b of the discharge electrodes 13a to 13c are directed to the direction orthogonal to the gas flow direction or the upstream side of the gas. This prevents dust from adhering to the tips of the discharge portions 14a and 14b, as with the gas upstream surface of the ground electrodes 12a to 12d.
  • a link mechanism that can rotate around the ground poles 12a to 12d may be installed.
  • the link mechanism rotates the ground poles 12a to 12d by a predetermined angle at predetermined time intervals.
  • FIG. 4 shows another example of the electrode arrangement of the precharge unit.
  • a plurality of rows of ground electrodes 22 and rows of discharge electrodes 23 are installed in the gas flow passage 21 in the gas flow direction.
  • the rows of earth electrodes 22 and the rows of discharge electrodes 23 are alternately arranged. If a plurality of rows of ground electrodes 22 and discharge electrodes 23 are installed as shown in FIG. 4, dust charging performance is improved.
  • the number of stages of the ground electrode 22 row and the discharge electrode row 23 may be appropriately set.
  • the distance D between adjacent earth electrodes 22 in the gas flow direction is set to 2d or more.
  • the gas also collides with the gas upstream surface of the ground electrode 22 in the latter stage within the above flow velocity range, and the cleanliness of the gas upstream surface is maintained.
  • the distance between the earth electrodes in the gas flow direction is appropriately set so that the cleanliness of the gas upstream surface can be ensured as in the cylinder shape.
  • the rows of discharge electrodes 23 located between the rows of earth electrodes 22 indicate the distance in the gas flow direction between the center position of the ground electrode 22 and the center position of the discharge electrode 23 in the gas flow direction.
  • the distance in the gas flow direction between the center position of the ground electrode 22 at the rear stage and the center position of the discharge electrode 23 is L2
  • the discharge electrode 23 and the ground electrode 22 are arranged so that the tip of the discharge unit is located upstream of the center of each ground electrode 22. More preferably, the discharge electrode 23 and the ground electrode 22 are arranged such that the tip of the discharge portion is located on the gas upstream side of the gas upstream end of the ground electrode 22. Further, it is preferable that the ground electrode 22 and the wall 25 adjacent to the wall 25 of the gas flow path be as close as possible in order to reduce the amount of gas passing through.
  • the discharge electrode 23 when the discharge electrode 23 is located between adjacent ground electrodes 22, the gas upstream surface of the nearest ground electrode 22 located on the gas downstream side of the discharge electrode 23 and the discharge electrode 23. Corona discharge is reliably generated between the two. On the other hand, corona discharge is suppressed between the discharge electrode 23 and the surface of the earth electrode 22 located on the gas upstream side of the discharge electrode 23 on which dust is deposited (surface on the gas downstream side). 4, the corona discharge is mainly generated between the discharge electrode 23 and the gas upstream surface of the earth electrode 22. For this reason, stable charging ability is continued.

Landscapes

  • Electrostatic Separation (AREA)

Abstract

L'invention concerne un dispositif collecteur de poussière capable d'enlever efficacement les substances à collecter. Un dispositif collecteur de poussière est équipé, dans l'ordre à partir du côté amont, d'une unité de charge préliminaire (3) et d'un filtre à sac dans le conduit d'évacuation à travers lequel circulent les gaz. Des électrodes de décharge (13a - 13c) et des électrodes de terre (12a - 12d) disposées dans une direction orthogonale à la direction de circulation des gaz se trouvent dans le canal de distribution de gaz (11) de l'unité de charge préliminaire (3). Les électrodes de décharge (13) comprennent de multiples sections de décharge en saillie. Une décharge en couronne est générée entre une électrode de décharge (13a) et les surfaces (A) qui font face au côté gaz en amont des deux électrodes de terre (12a, 12b) adjacentes à l'électrode de décharge (13a) et la décharge en couronne est limitée aux surfaces (B) qui font face au côté gaz en aval des électrodes de terre (12a, 12b).
PCT/JP2012/067288 2012-07-06 2012-07-06 Dispositif collecteur de poussière WO2014006736A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/067288 WO2014006736A1 (fr) 2012-07-06 2012-07-06 Dispositif collecteur de poussière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/067288 WO2014006736A1 (fr) 2012-07-06 2012-07-06 Dispositif collecteur de poussière

Publications (1)

Publication Number Publication Date
WO2014006736A1 true WO2014006736A1 (fr) 2014-01-09

Family

ID=49881525

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/067288 WO2014006736A1 (fr) 2012-07-06 2012-07-06 Dispositif collecteur de poussière

Country Status (1)

Country Link
WO (1) WO2014006736A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016153110A (ja) * 2015-02-20 2016-08-25 アズビル株式会社 電気集塵機
KR20200094210A (ko) * 2018-01-15 2020-08-06 미츠비시 히타치 파워 시스템즈 칸쿄 솔루션 가부시키가이샤 전기 집진 장치
US20210283621A1 (en) * 2018-08-01 2021-09-16 Mitsubishi Power Environmental Solutions, Ltd. Electrostatic precipitator

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57180445A (en) * 1981-04-30 1982-11-06 Hitachi Plant Eng & Constr Co Ltd Dust filtering and collecting device
JPS60227851A (ja) * 1984-04-27 1985-11-13 Mitsubishi Heavy Ind Ltd 電気集塵装置の予備荷電装置
JPS6146267A (ja) * 1984-08-07 1986-03-06 Nippon Soken Inc イオン風発生器
JPS627456A (ja) * 1985-07-04 1987-01-14 Takahide Ono 電気集塵装置
JPS63274428A (ja) * 1987-05-07 1988-11-11 Central Res Inst Of Electric Power Ind 石炭ガス化ガス静電多孔質集塵装置
JPH0237751U (fr) * 1988-09-06 1990-03-13
JPH1043629A (ja) * 1996-08-08 1998-02-17 Daikin Ind Ltd 空気清浄機
JP2002500562A (ja) * 1998-03-23 2002-01-08 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 空気清浄機
JP2010069360A (ja) * 2008-09-16 2010-04-02 Fuji Electric Systems Co Ltd 電気集塵装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57180445A (en) * 1981-04-30 1982-11-06 Hitachi Plant Eng & Constr Co Ltd Dust filtering and collecting device
JPS60227851A (ja) * 1984-04-27 1985-11-13 Mitsubishi Heavy Ind Ltd 電気集塵装置の予備荷電装置
JPS6146267A (ja) * 1984-08-07 1986-03-06 Nippon Soken Inc イオン風発生器
JPS627456A (ja) * 1985-07-04 1987-01-14 Takahide Ono 電気集塵装置
JPS63274428A (ja) * 1987-05-07 1988-11-11 Central Res Inst Of Electric Power Ind 石炭ガス化ガス静電多孔質集塵装置
JPH0237751U (fr) * 1988-09-06 1990-03-13
JPH1043629A (ja) * 1996-08-08 1998-02-17 Daikin Ind Ltd 空気清浄機
JP2002500562A (ja) * 1998-03-23 2002-01-08 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 空気清浄機
JP2010069360A (ja) * 2008-09-16 2010-04-02 Fuji Electric Systems Co Ltd 電気集塵装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016153110A (ja) * 2015-02-20 2016-08-25 アズビル株式会社 電気集塵機
KR20200094210A (ko) * 2018-01-15 2020-08-06 미츠비시 히타치 파워 시스템즈 칸쿄 솔루션 가부시키가이샤 전기 집진 장치
EP3725412A4 (fr) * 2018-01-15 2021-01-20 Mitsubishi Hitachi Power Systems Environmental Solutions, Ltd. Précipitateur électrostatique
KR102451222B1 (ko) * 2018-01-15 2022-10-06 미츠비시 쥬고 파워 칸쿄 솔루션 가부시키가이샤 전기 집진 장치
US11484890B2 (en) 2018-01-15 2022-11-01 Mitsubishi Heavy Industries Power Environmental Solutions, Ltd. Electrostatic precipitator
US20210283621A1 (en) * 2018-08-01 2021-09-16 Mitsubishi Power Environmental Solutions, Ltd. Electrostatic precipitator

Similar Documents

Publication Publication Date Title
WO2011152357A1 (fr) Procédé de fonctionnement de dispositif de collecte de poussière, et dispositif de collecte de poussière
US4955991A (en) Arrangement for generating an electric corona discharge in air
US10994282B2 (en) Electric precipitator air pollution control device
US11364508B2 (en) Electrostatic air filter
JP2007100635A (ja) 排気ガス浄化装置
FI124675B (fi) Menetelmä pienhiukkasten keräämiseksi savukaasuista sekä vastaava sovitelma
JP2005320895A (ja) ガス浄化装置
JP2005320895A5 (fr)
EP2922636A1 (fr) Électro-filtre pour la purification de fumée provenant de chaudières à paille de petite taille
JP2010069360A (ja) 電気集塵装置
JP5959960B2 (ja) 湿式電気集塵装置及び排ガス処理方法
WO2014006736A1 (fr) Dispositif collecteur de poussière
KR100876141B1 (ko) 전기집진기용 방전판
CA2985468C (fr) Methode et configuration
JP2010075864A (ja) 電気集塵機
KR20070050620A (ko) 농축 플라즈마 방식 배출입자 처리장치
RU170489U1 (ru) Электрофильтр
JP2011031127A (ja) 集塵装置
CN215389993U (zh) 电场装置和气体净化装置
KR102448562B1 (ko) 환형 방전 영역을 이용해 먼지입자를 포집하는 집진장치 및 이를 포함하는 집진시스템
RU171798U1 (ru) Электрофильтр
RU2330726C1 (ru) Электрофильтр с электродами волнового профиля
RU2330727C1 (ru) Электрофильтр
KR102533511B1 (ko) 전기집진장치용 빗살형 이오나이저
RU2370320C1 (ru) Электрофильтр со смещенными продольными вставками коронирующих электродов

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12880424

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12880424

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP