EP1752223B1 - Elektrofilter für Abgassysteme - Google Patents

Elektrofilter für Abgassysteme Download PDF

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Publication number
EP1752223B1
EP1752223B1 EP06015104A EP06015104A EP1752223B1 EP 1752223 B1 EP1752223 B1 EP 1752223B1 EP 06015104 A EP06015104 A EP 06015104A EP 06015104 A EP06015104 A EP 06015104A EP 1752223 B1 EP1752223 B1 EP 1752223B1
Authority
EP
European Patent Office
Prior art keywords
slats
bunker
filter according
electric filter
exhaust gas
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP06015104A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1752223A1 (de
Inventor
Birgit Wortmann
Werner Stratmann
Peter Hages
Hermann BRÜGGENDICK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steag Energy Services GmbH
Original Assignee
Evonik Energy Services GmbH
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 Evonik Energy Services GmbH filed Critical Evonik Energy Services GmbH
Priority to PL06015104T priority Critical patent/PL1752223T3/pl
Publication of EP1752223A1 publication Critical patent/EP1752223A1/de
Application granted granted Critical
Publication of EP1752223B1 publication Critical patent/EP1752223B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • B03C3/366—Controlling flow of gases or vapour by static mechanical means, e.g. deflector located in the filter, e.g. special shape of the 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
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/011—Prefiltering; Flow controlling
    • 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
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • B03C3/363—Controlling flow of gases or vapour by static mechanical means, e.g. deflector located before the filter

Definitions

  • the invention relates to a dry electrostatic precipitator for exhaust systems, in which flows to be cleaned exhaust gas from a Anströmkanal via a diffuser in an interior of a filter housing, wherein incorporated in the interior of precipitation electrodes and spray electrodes for the separation of dust particles from the exhaust stream in a predetermined distribution and a dust collector with several , Preferably funnel-shaped bunkers in a bottom side of the housing is arranged.
  • the task of the diffuser is to distribute the quantity of exhaust gas supplied from the inflow channel to the enlarged inlet surface of the filter housing interior.
  • the aim is to achieve defined velocity and ash particle distributions of the exhaust gas in the interior of the filter, and to minimize those flow components that bypass the side, above or below the collecting electrodes (bypass flows). This goal should be achieved with the lowest possible pressure loss and the lowest possible construction volume of the necessary conversion measures. So far, suitable baffles were installed in the diffuser or in the filter housing immediately behind the diffuser, as well as vertical partitions in the individual bunkers to avoid Bypbibströmungen.
  • Electrostatic precipitator arrangements are for example from the DE 1 557 008 A1 , of the US 4,026,683 A , of the US 2,634,818 or the GB 1 322 684 known. These have below the substantially horizontally flowed through the electric filter arrangement ash collection bunker. To allow a flow through the upper sections of the collection bunker To avoid vertical baffles are arranged in the bunker, which prevent a horizontal flow, but allow a vertical fall of the ash.
  • the invention has for its object to improve the flow profiles in the filter housing and thus the efficiency of the dust particle deposition.
  • the invention provides for the solution of the invention task that at least one transverse to the exhaust inflow direction slat is installed in a bunker adjacent to the diffuser obliquely to the vertical direction such that it largely uniformly impinging the exhaust gas flow at the bunker passes and approximately in a longitudinal direction of the filter (target flow direction) directs.
  • at least one transverse to the exhaust inflow direction slat is installed in a bunker adjacent to the diffuser obliquely to the vertical direction such that it largely uniformly impinging the exhaust gas flow at the bunker passes and approximately in a longitudinal direction of the filter (target flow direction) directs.
  • the measures according to the invention are directed primarily to the diffuser-adjacent bunker cells. These were previously the cause of the strongest deviations from the desired flow profile of the exhaust stream.
  • the well-known installation of a vertical and central partition helps little; because a vertical partition inevitably causes a strong deflection of the exhaust gas flow in the vertical direction, which in turn leads to a disability of the precipitated from the collecting electrodes, falling down agglomerated particles.
  • the transverse slat is installed such that the incident exhaust gas flow is deflected predominantly in the longitudinal direction of the housing interior.
  • a group of mutually spaced lamellae immersed in each of the bunker cells adjacent to the diffuser This further improves the large-area deflection of the exhaust stream directed into the bunker cell in the housing longitudinal direction and creates the prerequisite for optimizing the flow profile in the electrostatic precipitator and thus increasing the separation efficiency.
  • each slat has an upper edge which is at or above a bunker entry level runs. As a result, the bypass flow into the adjacent precipitation electrode field is further reduced. The height above the upper bunker edge is limited by the high-voltage components.
  • a particularly simple design is characterized in that the lamellae of a group are arranged in approximately parallel planes. It is expedient if the lamellae of a group are arranged at equal mutual distances.
  • the height dimensions and thus the immersion depths of the slats in the bunker are based on the distances between the sheets to each other and is preferably about twice the fin spacing.
  • the height dimension of the slats is preferably so short that a flow of dust from the bunker is not hindered.
  • the immersion depths of the slats in the bunker are preferably 1/4 to 1/3 of the Bunkerwandianaen.
  • FIG. 1 For separating the dust particles plate-shaped collecting electrodes 5 are arranged in parallel planes which correspond to the main flow direction of the gas flowing from the diffuser 2 to the outflow hood 3 gas.
  • the bottom side of the filter housing 1 is formed by a matrix of funnel-shaped bunkers 4, 4a... 4d arranged in rows and columns.
  • the bunkers serve to remove the dust particles deposited in the electrostatic precipitator.
  • the spray electrodes are associated with the collecting electrodes 5, in the drawing according to FIG. 1 but not shown.
  • a plurality of substantially parallel slats 6 are arranged transversely to the flow direction.
  • the slats 6 extend substantially parallel to the downstream bunker wall 8, that is, in the illustrated embodiment at an angle of approximately 30 ° to the vertical plane.
  • Other lamellar inclination angles may be appropriate in adaptation to the profiles of the impinging exhaust gas flow, taking into account the avoidance of dust deposits on the fins.
  • FIG. 2 The arrangement of a lamella group in a bunker 4 closest to the diffuser 2 is shown schematically in FIG FIG. 2 shown.
  • FIG. 2 shown slats 6 extend in parallel planes.
  • Each of the fins 6 projects with an upper portion above the level of bunker level 9.
  • the immersion depth of the slats in the bunker 4 is selected so that the lower discharge edge 7 of each slat is arranged at a distance both to a bunker wall and to each adjacent slat.
  • the adjacent front bunker wall or bunker floor thus always has a sufficiently large gap-shaped opening for unimpeded removal of the deposited dust particles which slip off on a lamella 6.
  • the angle of attack of each lamella is chosen to be sufficiently steep, so that the lamella 6, similar to the bunker wall 8, can act as a chute for the dust particles.
  • the collecting function of the bunker cell 4 remains practically the same as that of a bunker cell 4a without internals.
  • FIG. 2 schematically a vertical section through a funnel-shaped bunker 4 is shown with a flow thread fan 10, which illustrates the advantageous effect of the fin group 6 on the flow profile in the region of the first bunker row.
  • the exiting from the diffuser 2, directed into the lower region of the filter housing exhaust gas flow is deflected by the oblique slats approximately in the longitudinal direction of the filter housing. Because of this deflection, the transverse flow components are better distributed to the interior and reduces the speed differences occurring at the exhaust gas inlet into the interior. By far the greatest part of the flow now moves within the effective range of the collecting electrodes 5, so that the efficiency of the electrostatic precipitator is improved.
  • the installation parameters of the lamella group 6 can be varied in many cases in coordination with the respective flow profile in the output plane of the diffuser 2.
  • the number of submerged in a funnel-shaped bunker 4 slats 6, their mutual distance and / or their dimensions above and below the bunker level 9 are changed.
  • the inlet-side region of the bunker 4 adjacent to the diffuser 2 is occupied by lamellae 6 which redirecting the exhaust gas flow in the longitudinal direction of the interior of the electrostatic filter.
  • the individual slats 6 can also, as in FIG. 2 shown, sometimes have different distances to each other.
  • slats 6 as flat sheets proves to be particularly easy to manufacture. Possible and in certain flow profiles may be appropriate but also a curved or angled course of the individual slats. For a better sliding of the dust on the sheets, a comb-shaped shape can be selected on the underside. Examples are in the Figures 3a, 3b and 3c Shown schematically at 6a, 6b and 6c.
  • FIG. 4 is a plate-shaped blade 6 shown schematically, the discharge edge 7a is toothed.
  • the teeth of the discharge edge facilitates in many cases the sliding and throwing the dust particles into the bunker. 4

Landscapes

  • Electrostatic Separation (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP06015104A 2005-08-09 2006-07-20 Elektrofilter für Abgassysteme Not-in-force EP1752223B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06015104T PL1752223T3 (pl) 2005-08-09 2006-07-20 Elektrofiltr do układów wylotu spalin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005037993A DE102005037993B4 (de) 2005-08-09 2005-08-09 Elektrofilter für Abgassysteme

Publications (2)

Publication Number Publication Date
EP1752223A1 EP1752223A1 (de) 2007-02-14
EP1752223B1 true EP1752223B1 (de) 2009-09-02

Family

ID=37390905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06015104A Not-in-force EP1752223B1 (de) 2005-08-09 2006-07-20 Elektrofilter für Abgassysteme

Country Status (4)

Country Link
EP (1) EP1752223B1 (pl)
AT (1) ATE441480T1 (pl)
DE (2) DE102005037993B4 (pl)
PL (1) PL1752223T3 (pl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105709937A (zh) * 2014-12-01 2016-06-29 天津蓝巢电力检修有限公司 加装灰斗吹扫装置的电除尘器系统
CN109395883A (zh) * 2017-08-18 2019-03-01 武汉科技大学 一种等容低速侧流静电除尘器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429856C (de) * 1924-12-23 1926-06-10 Lurgi Appbau Ges M B H Elektrische Niederschlagsanlage zur Abscheidung von Rauch, Staub oder Nebeln aus Gasen
DE703663C (de) * 1937-06-02 1941-03-13 Patentverwertung Leitflaecheneinbau in gekruemmten oder winklig gebogenen Gaskanaelen, insbesondere in der Zuleitung zu Elektrofiltern
FR885853A (fr) * 1941-09-17 1943-09-28 Siemens Lurgi Cottrell Elektro Dépoussiéreur électrique, notamment pour automobiles fonctionnant au gaz de générateur
US2634818A (en) * 1949-12-06 1953-04-14 Research Corp Gas cleaning apparatus
GB705036A (en) * 1951-11-09 1954-03-03 Richard Fritz Heinrich Improvements relating to electrostatic precipitators
DE1557008A1 (de) * 1967-05-16 1970-03-19 Appbau Rothemuehle Brandt & Kr Elektrofilter mit Beipassablenkung
GB1185601A (en) * 1968-01-12 1970-03-25 Orbitron Electronic Products L Improvements in and relating to Air Filters
US3733785A (en) * 1971-02-04 1973-05-22 Envirotech Corp Gas flow regulation for electric precipitators
US3853511A (en) * 1972-02-16 1974-12-10 Elex Ltd Electrical precipitating apparatus
US4026683A (en) * 1975-11-20 1977-05-31 Environmental Elements Corporation Inlet duct and hopper apparatus for electrostatic precipitators
US5030261A (en) * 1988-02-12 1991-07-09 Giambattista Giusti Two stage transition input section for dust collectors
US5156658A (en) * 1991-05-01 1992-10-20 Research-Cottrell, Inc. Electrostatic precipitator gas inlet plenum having a corrugated perforated plate

Also Published As

Publication number Publication date
ATE441480T1 (de) 2009-09-15
PL1752223T3 (pl) 2010-02-26
EP1752223A1 (de) 2007-02-14
DE502006004717D1 (de) 2009-10-15
DE102005037993B4 (de) 2007-12-27
DE102005037993A1 (de) 2007-02-22

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