WO1999059724A1 - Verfahren zum reinigen von elektrofiltern und elektrofilter mit reinigungsvorrichtung - Google Patents
Verfahren zum reinigen von elektrofiltern und elektrofilter mit reinigungsvorrichtung Download PDFInfo
- Publication number
- WO1999059724A1 WO1999059724A1 PCT/DE1999/001071 DE9901071W WO9959724A1 WO 1999059724 A1 WO1999059724 A1 WO 1999059724A1 DE 9901071 W DE9901071 W DE 9901071W WO 9959724 A1 WO9959724 A1 WO 9959724A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stage
- cleaning
- cleaning body
- spray electrode
- engine
- Prior art date
Links
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
- B03C3/74—Cleaning the electrodes
- B03C3/743—Cleaning the electrodes by using friction, e.g. by brushes or sliding elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/1007—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the purification means combined with other functions
- F01M2001/1021—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the purification means combined with other functions comprising self cleaning systems
Definitions
- the invention relates to a method according to the preamble of
- a generic method is known from EP 0 433 152 A1.
- the filter performance of the electrostatic filter is considerably impaired while the spray electrode is being cleaned.
- the cleaning body can be moved over almost the entire length of the spray electrode.
- the overall filter performance is affected to a comparatively small extent by cleaning.
- the considerable space requirement and the higher manufacturing costs of such an arrangement of several electric filters are accepted.
- a generic electric filter is known in which the problems mentioned above occur.
- the spray electrode designed as a wire has a comparatively large length. Accordingly, it is sensitive to vibrations. This affects the choice of possible areas of application.
- the generic electric filter is intended for the dedusting of gases.
- the object of the invention is to improve a generic electric filter in such a way that it is robust, inexpensive to produce and enables a high, constant filter performance, and to provide a method which ensures reliable cleaning of the spray electrode without impairing the filter performance.
- the two-stage design of the spray electrode not only makes it robust and insensitive to vibrations, but also, due to the different field line density, means that the solids accumulate almost exclusively at the first stage.
- the cleaning can therefore be limited to this area of comparatively small overall length. Therefore, a correspondingly short-stroke drive of the cleaning body is sufficient, which can be effected with structurally simple and inexpensive means.
- the energy to guide the cleaning body along the spray electrode can advantageously only be provided by the engine's own energy, so that additional drive elements - e.g. in the form of electric drives - which are expensive and which can be prone to malfunction due to the effects of heat and vibrations.
- a fluid or gas-filled expansion body can be provided, which is thermally connected to the engine and which heats up as a result of the operation of the engine, the subsequent cooling of the engine while it is at a standstill, a backward movement of the expansion body and the cleaning body connected to it causes the spray electrode to be cleaned during this movement.
- Overpressures or underpressures, for example of gases or oil, built up on the engine side can also be used to move a membrane which moves the cleaning body into a starting position, so that when the engine is subsequently stopped. stood, if the positive or negative pressure is no longer maintained, the backward movement of the cleaning body takes place.
- This backward movement can be caused by the volume reduction of the expansion fluid or by the spring force of the membrane or an additional spring, the cleaning body being held against the action of the spring in a position in which it is not in contact with the spray electrode during motor operation, so that an optimal Separation performance of the electrostatic filter is ensured with the engine running.
- the cleaning body and the movable components connected to it are designed as a spring-mass system, so that with certain vibrations of the motor a resonance frequency of this spring-mass system is achieved, which causes the cleaning body to oscillate, so that it performs its cleaning motion along the first stage of the spray electrode.
- the cleaning of the first stage can be ensured in a particularly simple and reliable manner if its cross section remains the same over its overall length and enables the cleaning body to lie evenly during its movement.
- this first stage advantageously has a constant cross-sectional contour, so that a good contact of the cleaning body with this first stage can always be ensured.
- a not completely identical cross-sectional constancy can be achieved over the entire length of the first stage. For example, when casting the electrodes, a certain bevel may be necessary in order to facilitate the removal of the cast electrode body from the casting mold.
- the invention proposes a regular one
- the consistently high filter performance is achieved by this regular cleaning and can also be supported by the fact that the cleaning body is fundamentally not moved along the spray electrode during engine operation and accordingly the performance of the spray electrode is not impaired.
- the cleaning body with the engine's own energy is only in one at the beginning of engine operation
- 1 is a crankcase ventilation of an internal combustion engine with a first embodiment of an electrostatic filter provided with a cleaning device
- FIG. 2 shows a second embodiment with a different arrangement of the expansion element and a different holder of the cleaning body compared to FIG. 1, and
- Fig. 3 shows a third embodiment with a membrane-operated cleaning body and with a different from the Fig.1 and 2 Eieelektrodenbauorm.
- the electric filter 1 shows a crankcase ventilation of an internal combustion engine, the ventilation gases being passed through an electric filter 1.
- the electric filter 1 has a spray electrode 2, while the housing surrounding the spray electrode 2 serves as a precipitation electrode 3.
- the spray electrode 2 is configured in two stages and has a freely ending first stage 4 with an almost constant cylindrical cross section, which has a comparatively small diameter and a short axial length.
- the first stage 4 is followed by a second stage 5, which is about her
- Length is slightly tapered, the entire spray electrode being fixed and held with the broad end of the second stage 5 on the housing.
- the electrical field line density is greatest in the area of the first stage.
- a corona is formed at the free end, which serves to ionize the particles to be separated.
- these ionized particles are caused by the electric field between the spray electrode 2 and the
- the field line density as generated by the second stage 5 is sufficient to maintain the electric field.
- the two-stage design of the spray electrode 2 brings about very good vibration resistance to the vibrations generated by the internal combustion engine.
- the first stage 4 is regularly cleaned by a cleaning body 6, which surrounds the first stage 4 and is movably supported as a wiper along this first stage 4. To this
- Purpose is the cleaning body 6 attached to an arm 7, which in turn is supported by an arm 8 of a movably mounted sleeve 9.
- the sleeve 9 is urged upward in the drawing by a compression spring 10, that is to say held in the position shown in the drawing.
- an expansion body 11 which is connected, for example, to the coolant circuit of the engine or, as shown in FIG. 1, is heated by the air present in the crankcase, and in which the resulting engine heat becomes one Expansion of a liquid or a gas leads inside.
- a plunger 12 of the expansion body 11 moves the sleeve 9 and thus the boom 8 and the arm 7 against the action of the compression spring 10, so that the cleaning body 6 is removed from the first stage 4 of the spray electrode 2.
- the cleaning body 6 is at a distance from the spray electrode 2, so that its function is unimpaired and optimal separation results can be achieved.
- the fluid in the expansion body 11 contracts. If the sleeve 9 is firmly connected to the plunger 12, the return movement of the cleaning body 6 can be brought about in this way alone. For the rest, the sleeve 9 is the 10 pushed back into its position shown in the drawing. In this case, the cleaning body 6 on the first stage 4 of the spray electrode 2 is moved into the position shown in the drawing and thereby wipes off contaminants from the first stage 4.
- the expansion body 11 can be provided in a modification of the exemplary embodiment to connect the expansion body to a pressure line of the engine.
- a pressure line of the engine For example, by the oil pressure built up by the engine or by a vacuum, e.g. B. when accelerating, a first movement of the sleeve 9 can be effected in the manner described, and the corresponding return movement when the engine is at a standstill can be effected by a spring comparable to the compression spring 10.
- Fig. 2 shows a second embodiment of the invention, which is basically identical to that of Fig.1.
- the arm 7 runs at a greater radial distance from the first stage 4 of the spray electrode 2. Even if the cleaning body 6 rests on the spray electrode 2, the configuration of a corona at the free end of the first stage 4 is hardly disturbed in this way, since the arm 7 the correspondingly large distance having.
- the boom 8 has a first section 8a which extends radially outward from the cleaning body 6 in relation to the first stage 4 and thereby determines the distance of the arm 7 from the first stage 4 of the spray electrode 2.
- At the lower end of the arm 7 is a second section 8b of the
- Boom 8 is provided to create the connection to the expansion body 11.
- the cleaning body 6 becomes along the first
- Stage 4 of the spray electrode 2 is shifted upward, that is, it moves away from the free end of the first stage 4, so that the corona can form almost undisturbed at this free end, thus ensuring the desired cleaning properties of the electrostatic filter 1. If the cleaning body 6 is subsequently moved back in one of the ways already described, it strips off the contaminants from the first stage 4 without completely moving away from the first stage 4, so that the subsequent threading between the first stage 4 and the cleaning body 6 is avoided and
- the expansion body 11 is closer to the heat-carrying medium within the engine than in the first embodiment, so that faster heating and thus faster expansion of the expansion body 11 is ensured. In this way it is quickly ensured that the cleaning body 6 is removed from the free tip of the first stage 4 and an optimal formation of the corona and thus an optimal cleaning effect of the electrostatic filter is made possible.
- FIG. 3 shows an exemplary embodiment which, in comparison to the examples in FIGS. 1 and 2, does not work in a temperature-dependent manner but in a pressure-dependent manner: a membrane 14 is fixed on its outer circumference 15 and is solid in FIG. 3
- the cleaning body 6 is designed as a pin surrounded by an elastomer.
- the membrane 14 As shown by dashed lines, can be moved into a release position in which the cleaning body 6 is removed from the free end of the first step 4 and enables the free formation of a corona at this free end.
- the membrane 14 is part of a pressure cell 16 which is connected to the surrounding pressure, for example atmospheric pressure, via a bore 17.
- the pressure cell can be connected to other pressure conditions, in deviation from the exemplary embodiment shown in FIG. 3, for example, by drilling the bore 17 with other pressure areas. half of the entire engine is connected or by the pressure cell 16 is not arranged within the pressure chamber of the crankcase ventilation, but in another pressure chamber. Then, however, an additional pressure control membrane would be required for the crankcase.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrostatic Separation (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/462,771 US6348103B1 (en) | 1998-05-19 | 1999-04-03 | Method for cleaning electrofilters and electrofilters with a cleaning device |
JP2000549381A JP4404482B2 (ja) | 1998-05-19 | 1999-04-03 | 電子フィルタのクリーニング方法及びクリーニング装置を備えた電子フィルタ |
BR9906461-8A BR9906461A (pt) | 1998-05-19 | 1999-04-03 | Processo para a limpeza de eletrofiltros e eletrofiltros com dispositivo de limpeza |
DE59910982T DE59910982D1 (de) | 1998-05-19 | 1999-04-03 | Verfahren zum reinigen von elektrofiltern und elektrofilter mit reinigungsvorrichtung |
KR1020007000583A KR100588387B1 (ko) | 1998-05-19 | 1999-04-03 | 전기 필터의 세정 방법 및 세정 장치를 갖춘 전기 필터 |
EP99952079A EP0998354B1 (de) | 1998-05-19 | 1999-04-03 | Verfahren zum reinigen von elektrofiltern und elektrofilter mit reinigungsvorrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19822332.3 | 1998-05-19 | ||
DE19822332A DE19822332C1 (de) | 1998-05-19 | 1998-05-19 | Verfahren zum Reinigen von Elektrofiltern und Elektrofilter mit Reinigungsvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999059724A1 true WO1999059724A1 (de) | 1999-11-25 |
Family
ID=7868215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001071 WO1999059724A1 (de) | 1998-05-19 | 1999-04-03 | Verfahren zum reinigen von elektrofiltern und elektrofilter mit reinigungsvorrichtung |
Country Status (7)
Country | Link |
---|---|
US (1) | US6348103B1 (de) |
EP (1) | EP0998354B1 (de) |
JP (1) | JP4404482B2 (de) |
KR (1) | KR100588387B1 (de) |
BR (1) | BR9906461A (de) |
DE (2) | DE19822332C1 (de) |
WO (1) | WO1999059724A1 (de) |
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EP2060325A1 (de) | 2007-11-19 | 2009-05-20 | Paul Forsthuber | Verfahren zum Reinigen von Elektrofiltern sowie Elektrofilter für die Durchführung dieses Verfahrens |
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US20070151455A1 (en) * | 2005-07-06 | 2007-07-05 | Gates Peter J | Cleaning device |
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US8482898B2 (en) * | 2010-04-30 | 2013-07-09 | Tessera, Inc. | Electrode conditioning in an electrohydrodynamic fluid accelerator device |
EP2724431B1 (de) | 2011-06-22 | 2017-02-15 | Koninklijke Philips N.V. | Reinigungsvorrichtung zum reinigen des luftionisierenden teils einer elektrode |
FR3010642B1 (fr) * | 2013-09-13 | 2015-10-09 | Commissariat Energie Atomique | Collecteur electrostatique |
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1998
- 1998-05-19 DE DE19822332A patent/DE19822332C1/de not_active Expired - Fee Related
-
1999
- 1999-04-03 US US09/462,771 patent/US6348103B1/en not_active Expired - Fee Related
- 1999-04-03 DE DE59910982T patent/DE59910982D1/de not_active Expired - Fee Related
- 1999-04-03 WO PCT/DE1999/001071 patent/WO1999059724A1/de active IP Right Grant
- 1999-04-03 JP JP2000549381A patent/JP4404482B2/ja not_active Expired - Fee Related
- 1999-04-03 EP EP99952079A patent/EP0998354B1/de not_active Expired - Lifetime
- 1999-04-03 BR BR9906461-8A patent/BR9906461A/pt active Search and Examination
- 1999-04-03 KR KR1020007000583A patent/KR100588387B1/ko not_active IP Right Cessation
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7115153B2 (en) * | 2002-07-12 | 2006-10-03 | Hengst Gmbh & Co. Kg | Electric separator with a rinsing cleaning system |
EP2060325A1 (de) | 2007-11-19 | 2009-05-20 | Paul Forsthuber | Verfahren zum Reinigen von Elektrofiltern sowie Elektrofilter für die Durchführung dieses Verfahrens |
AT506064B1 (de) * | 2007-11-19 | 2009-06-15 | Forsthuber Paul | Verfahren zum reinigen von elektrofiltern sowie elektrofilter für die durchführung dieses verfahrens |
Also Published As
Publication number | Publication date |
---|---|
EP0998354B1 (de) | 2004-11-03 |
BR9906461A (pt) | 2000-09-26 |
KR100588387B1 (ko) | 2006-06-13 |
JP4404482B2 (ja) | 2010-01-27 |
DE19822332C1 (de) | 1999-05-27 |
KR20010022015A (ko) | 2001-03-15 |
JP2002515331A (ja) | 2002-05-28 |
US6348103B1 (en) | 2002-02-19 |
DE59910982D1 (de) | 2004-12-09 |
EP0998354A1 (de) | 2000-05-10 |
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