EP1752223B1 - Filtre électrostatique pour systèmes d'échappement - Google Patents
Filtre électrostatique pour systèmes d'échappement Download PDFInfo
- 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
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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)
Claims (12)
- Electrofiltre pour des systèmes de gaz d'échappement, dans lequel les gaz d'échappement à épurer affluent d'un canal d'afflux par un diffuseur (2) dans un espace intérieur d'un boîtier de filtration (1), où sont montés dans l'espace intérieur des électrodes de dépôt (5) et des électrodes d'émission pour la séparation de particules de poussières du flux des gaz d'échappement selon une répartition prédéfinie, et un collecteur de poussière avec plusieurs réservoirs, de préférence en forme de trémie (4, 4a...4d), est disposé dans un côté de fond du boîtier, où au moins une lamelle (6) est disposée dans un réservoir (4) avoisinant le diffuseur (2) transversalement à la direction d'afflux des gaz d'échappement,
caractérisé en ce qu'au moins une lamelle précitée (6) est montée d'une manière oblique à la direction verticale dans le réservoir (4) de telle sorte qu'elle fait passer le flux de gaz d'échappement incident sensiblement régulièrement devant le réservoir (4) et le guide sensiblement dans une direction longitudinale du filtre, c'est-à-dire la direction d'écoulement de consigne. - Electrofiltre selon la revendication 1, caractérisé en ce qu'au moins une lamelle (6) possède une arête d'éjection inférieure (7) à laquelle est formée une ouverture traversante pour des particules de poussières séparées.
- Electrofiltre selon la revendication 1 ou 2, caractérisé en ce qu'un groupe de lamelles (6) disposées à un écart mutuel plonge dans chacun des réservoirs (4) avoisinant le diffuseur (2).
- Electrofiltre selon l'une des revendications 1 à 3, caractérisé en ce que chaque lamelle (6) possède une arête supérieure qui est disposée à la même hauteur ou à une hauteur plus élevée qu'un plan d'entrée de réservoir (9).
- Electrofiltre selon la revendication 3 ou 4, caractérisé en ce que les lamelles (6) d'un groupe sont disposées dans des plans parallèles.
- Electrofiltre selon l'une des revendications 3 à 5, caractérisé en ce que les lamelles (6) d'un groupe sont disposées à des écarts mutuels identiques.
- Electrofiltre selon l'une des revendications 1 à 6, caractérisé en ce que les profondeurs d'immersion des lamelles (6) dans le réservoir représentent 1/4 à 1/3 de la profondeur de la paroi du réservoir.
- Electrofiltre selon l'une des revendications 1 à 7, caractérisé en ce que les lamelles (6) sont formées par des tôles planes.
- Electrofiltre selon l'une des revendications 1 à 8, caractérisé en ce que la dimension en hauteur des lamelles (6) représente au moins le double que l'écart entre des lamelles avoisinantes.
- Electrofiltre selon l'une des revendications 1 à 7, caractérisé en ce que les lamelles (6a, 6b, 6c) ont des profilés bombés et/ou coudés.
- Electrofiltre selon l'une des revendications 1 à 10, où plusieurs réservoirs (4) de même construction sont disposés dans une rangée les uns à côté des autres au voisinage du diffuseur (2), et chaque réservoir de la rangée est muni d'un groupe de lamelles (6) de même réalisation et disposition.
- Electrofiltre selon l'une des revendications 1 à 11, caractérisé en ce que les lamelles (6) présentent au moins partiellement des arêtes d'éjection dentées (7a).
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 (fr) | 2007-02-14 |
EP1752223B1 true EP1752223B1 (fr) | 2009-09-02 |
Family
ID=37390905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06015104A Not-in-force EP1752223B1 (fr) | 2005-08-09 | 2006-07-20 | Filtre électrostatique pour systèmes d'échappement |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1752223B1 (fr) |
AT (1) | ATE441480T1 (fr) |
DE (2) | DE102005037993B4 (fr) |
PL (1) | PL1752223T3 (fr) |
Families Citing this family (2)
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)
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 |
-
2005
- 2005-08-09 DE DE102005037993A patent/DE102005037993B4/de not_active Expired - Fee Related
-
2006
- 2006-07-20 DE DE502006004717T patent/DE502006004717D1/de active Active
- 2006-07-20 EP EP06015104A patent/EP1752223B1/fr not_active Not-in-force
- 2006-07-20 AT AT06015104T patent/ATE441480T1/de active
- 2006-07-20 PL PL06015104T patent/PL1752223T3/pl unknown
Also Published As
Publication number | Publication date |
---|---|
ATE441480T1 (de) | 2009-09-15 |
PL1752223T3 (pl) | 2010-02-26 |
DE102005037993A1 (de) | 2007-02-22 |
EP1752223A1 (fr) | 2007-02-14 |
DE102005037993B4 (de) | 2007-12-27 |
DE502006004717D1 (de) | 2009-10-15 |
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