EP1735101A1 - Röhrenkollektor zur abscheidung elektrisch geladener aerosole aus einem gasstrom - Google Patents
Röhrenkollektor zur abscheidung elektrisch geladener aerosole aus einem gasstromInfo
- Publication number
- EP1735101A1 EP1735101A1 EP05716464A EP05716464A EP1735101A1 EP 1735101 A1 EP1735101 A1 EP 1735101A1 EP 05716464 A EP05716464 A EP 05716464A EP 05716464 A EP05716464 A EP 05716464A EP 1735101 A1 EP1735101 A1 EP 1735101A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- tubes
- group
- tube bundle
- collector according
- 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.)
- Granted
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
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/49—Collecting-electrodes tubular
-
- 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
- B03C3/16—Plant or installations having external electricity supply wet type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/38—Tubular collector electrode
Definitions
- Tube collector for the separation of electrically charged aerosols from a gas stream
- the invention relates to a tube collector in the form of a channel section for the deposition of electrically charged aerosols from a gas flowing through.
- the collector of the device consists of a housing, a grounded grid and a tube pack standing on it, whose tubes have a uniform length.
- the tubes are made of electrically conductive or dielectric material, they are stiff or flexible and their wall is smooth or textured. Inside the tubes spiral elements can be installed.
- the tube package can be moistened by a sprayer, which allows for the reduction of temperature, wetting and cleaning of the tube surface and increasing the efficiency of the deposition of charged aerosols.
- the gas stream runs from top to bottom, and is sprayed, the flow-facing end of the tube package, so that the spray liquid flows down therein / drains with the gas flow.
- the invention has for its object to provide a tube collector, can be deposited with the electrically charged aerosols from a gas flowing through long-term constant with great effectiveness on the tubes and discharged from the separator.
- the object is achieved by a tube collector, which is constructed according to the features of claim 1.
- the tube collector is installed in a channel portion of the gas flow conducting channel. This section is perpendicular with its channel or flow axis and the gas flow flows therein from bottom to top.
- the tube bundle group In the channel section is at least one tube bundle group.
- the tube bundle group consists of at least one tube bundle.
- the tube bundle group fills the clear channel cross-section as far as possible, unless there are technical-physical reasons that the cross-section of the tube bundle group must be smaller. In terms of flow, the largest possible bundle cross section forms the lowest flow resistance. In any case, this allows the construction of different sized separator and facilitates in particular the assembly.
- separators with a small channel cross-section will have a tube bundle group or tube bundle groups, each with one tube bundle. Larger groups of tube bundles consist of several tube bundles, which are still easy to handle during installation / maintenance.
- the tubes are all parallel to the flow axis.
- a spraying device is positioned centrally, which sits on the tube end of a coming from the exposed channel wall pipe for the detergent supply. At least the flow-averted / upper end of the tube bundle group will be sprayed out uniformly with rinsing liquid via the spraying device.
- rinsing liquid is very often water or another electrically conductive rinsing liquid. The choice of rinsing liquid determines the cleaning process to be carried out.
- dielectric rinsing liquids such as oils or lower alcohols or generally electrically non-conductive solvents come into consideration, with the consequence that then the tubes must be made of electrically conductive material.
- Alkalis or acids, again electrically conductive, may possibly also be considered as rinsing liquid.
- the structural components of the tube collector which come into contact with the gas flow and the rinsing agent must in any case be inert for the process. The materials are chosen considering that.
- Each tube bundle group rests against a grid / perforated plate, at least with its forehead facing the stream, and touches it electrically with at least one tube. All grids / perforated plates are connected to an electrical reference potential, in the majority of cases earth potential.
- the electrical charge released by the deposition on the tubing bundle group is dissipated through the respective grid, i. the separated aerosols / particles are electrically neutralized so that they can be rinsed off with the rinsing liquid.
- the meshes are at most so large that certainly no tube could slip through. If it is dielectric, an electrical line would have to be established between the grid / perforated plate and the tube bundle group.
- the tube collector then sits completely in a dielectric channel section, but at least two immediately successive tube bundle groups are electrically insulated from one another via a dielectric channel wall piece. At the same time, such a dielectric channel wall stuck to the entrance and exit of the tube collector for total electrical isolation.
- D ⁇ nne n is the clear diameter of the tubes used.
- the bundle height in the peripheral regions around the tubular collector longitudinal axis for the required reasons for dimensional stability of the tube bundle may vary only between the simple and below the double tube height and immediately adjacent peripheral areas must overlap such that there is an annular surface through which all tubes of the considered Peripheral areas go.
- a multiple, all-encompassing banding / lacing as in a flat lattice case is then no longer possible.
- a comprehensive bundling / lacing of the tube bundle towards the central bundle height can nevertheless bring about sufficient stability because of the approximately present rotational symmetry.
- the height may then be problematic in installation due to limited space.
- Essential for an efficient aerosol separation is that the tubes are at least so long that during a turbulent entry of the partial gas stream into the tube, a laminar flow formation occurs in the course of the flow, so that this partial gas stream flows out of the tube in a laminar manner.
- On the electrically charged aerosol particles in the laminar gas partial flow is a steady, radially directed force.
- the fluidic forces that always change direction do not allow this.
- the reference potential by adjusting the reference potential accordingly, the force can be adjusted in the amount on the electrically charged aerosol particles flowing through in the radial direction and in limits.
- the adjustment of the reference potential is currently such that these aerosol during the flow on the tube wall to drip. The longer the laminar flow state in the tube, the better the separation becomes.
- the tube geometry, here clear width and tube length is suggested on the one hand for the technical effectiveness by the flow and the aerosol therein and on the other hand by an economic structure of the tube collector.
- the sprayed rinse liquid is normal water that has ionic conductivity.
- the tubes may be made of dielectric material (claim 5), since the tubes are kept above the rinsing liquid water at the reference potential of the supporting grid / perforated plate.
- the grids which are electrically conductively contacted by the associated tube bundle group via at least one tube, are flat in the simplest construction (claim 4).
- an electrically non-conductive flushing liquid such as oil or low alcohols or paint solvents
- the tubes are then forcibly electrically conductive (claim 6), So at least with an electrically conductive the layer coated or made of metal or a sufficiently conductive carbon fiber composite material. They have such a structure, mesh size or perforation in the case of the perforated plate that a single tube bundle could not fall through.
- the bundled tubes are all the same for a tube bundle group. But the tubes can have many shapes. According to claim 7, they are round in cross section, according to claim 8 polygonal. Due to the flow resistance, this may eventually have to be taken into account for smaller channel cross-sections. With increasing channel cross-sections, this aspect is more obscure if the cross-section of the tube bundle group fills the clear channel cross-section as far as possible.
- a narrowed embodiment of a tube bundle is described in claim 9.
- the cross section of the tubes is polygonal, namely rectangular (hexagonal or honeycomb structure) or parallelogram quadrangular or regular hexagonal or triangular so as two adjacent triangles form a rectangular or parallelogrammar quadrangle.
- the tubes of a bundle are densely packed, ie, the mutual tube spacing s is zero or nearly zero.
- Such a tube bundle then has honeycomb structure and can be bundled / bundled from tubes of different heights or the tubes of a bundle are all the same height.
- such a tube bundle can also be cut directly from a continuous honeycomb structure with the respective honeycomb cross-section, with mutually parallel end faces perpendicular to the tube longitudinal axis or obliquely thereto.
- Both tube bundle types are suitable for the composition of a tube bundle group, in particular if the tube bundle group has non-planar end faces and therefore a segmented structure is necessary. The version and anchoring of such structures tures is technically easy.
- Such honeycomb structures are known from lightweight construction.
- Two simple ways of tube fixation can be achieved once according to claim 10 by w-shaped clamps and according to claim 11 by at least two grids through which all tubes go at least one tube bundle.
- the two grids have a mesh structure through which the tubes are formatted but stuck stuck.
- the stitches that are put through have a polygonal, at least triangular structure.
- the tube spacing s is achieved via the middle web of the W, at the same time two tubes are clamped in position via the outer and middle web. Always two W terminals hold two tubes in parallel position to each other.
- the degree of deposition can be further optimized if, as described in claim 12, the tubes from a group of tube bundles do not align with the tubes of the adjacent tube bundle group or at least most of them do not align with each other. This has the effect that, if the laminar flow state can be maintained in the interspace of two groups of tube bundles, the exiting laminar flow columns from one tube bundle group, on entering the following tube bundle, delgro group are cut longitudinally and thereby the former central region of a flow column on entry into the following group of tube bundles very likely decentralized continues near a tube wall inside or outside. Remaining aerosol particles from this formerly central flow column region then have a shorter radial path to the current tube wall.
- the tube separator / tube collector is structurally simple in construction and easy both as a small device with only one tube bundle per tube bundle group or modular larger to large device with several tube bundles per tube bundle group.
- FIG. 1 shows the tube collector
- Figure 4 shows the built-in tube bundle group in axial section
- Figure 3 shows the installed tube bundle group in radial section
- Figure 5 shows the axial section to each other positioned tubes
- Figure 6 shows the radial section to each other positioned tubes
- Figure 7 the number concentration and the fractional precipitation degree.
- FIG. 1 shows the tube collector in its installed position in the channel system for guiding a gas stream to be cleaned of electrically charged aerosol particles.
- the fume or raw gas flows from below into the tube collector and usually flows turbulently to the former, lower tube bundle group. It extends over the entire clear channel cross-section. There, the raw gas first meets the plane grid, which also extends over the clear channel cross-section, which is grounded.
- the plane grid which also extends over the clear channel cross-section, which is grounded.
- Aerosol particles present in them which are usually negatively charged electrically, are attracted radially to the nearest tube wall because of the effective electrical ground potential. At least the aerosol particles located close to a tube wall have a good chance of meeting the tube wall during the flow through and giving off their electrical charge there.
- the force effect on the aerosol particles is a combined, namely electrical and fluid mechanical.
- the spraying device is positioned centrally and centrally.
- the detergent feed takes place via the projecting from the free channel wall ago Pipe.
- the rinsing agent here water, for the rinsing of the deposited flue gas particles well suited.
- the sprayer sprays the lower as well as the upper tube bundle group.
- the prepurified gas flowing laminarly out of the first tube bundle group in columns continues to flow through the spray gap and strikes the second tube bundle group, which also stands on a grid with electrical reference potential.
- the lamiaren flow columns from the first group of tube bundles are very likely to be cut longitudinally when entering and form again in the flow on to laminar flow columns, from which the further deposition occurs.
- the gas escapes largely purified and continues to flow in the guide channel connected there.
- the rinsing effect can be improved even further if there is a spraying device above the last group of tube bundles with which the flow-facing / overhead forehead can also be sprayed. This measure is not necessarily mandatory.
- the grounding grid on the upstream side of a tube bundle is necessary for dissipation of the electrical charge.
- the rinsing of the tube bundle from the spray device between two successive tube bundles in countercurrent to the gas flow is effective only on separated and electrically neutral particles.
- An additional ground grid on the downstream side of the tube bundle does not significantly increase the degree of deposition but, if well connected, can contribute to the mechanical stiffness of the tube bundle.
- the two level grids allow irrigation fluid with aerosol to easily drain countercurrently into the space below with this type of installation.
- this type of construction and installation of the tube collector but that is in generally no problem, since such aerosol contaminated rinsing liquid can be easily collected and removed in a standing under the tube collector tray.
- FIG. 2 schematically shows the tube bundle group installed in the tube collector and reaching across the clear channel cross-section, the tubes of which are packed at different heights, here for simplicity only in two heights.
- the cross-sectional view in Figure 3 shows a sealed tube package, i. the tubes are very close to each other.
- FIG. 4 shows a tube arrangement in cross-section, in which the tubes stand by way of example on a regular basis, with their longitudinal axis in the corners of an equilateral triangle.
- the tubes which are all the same, have the clear diameter Dian en and the outer diameter D. They are about inserted W-shaped clamps with the distance s parallel to each other (see Figure 5 longitudinal section and Figure 6 cross-section).
- the clamps are here for a bundle with the height equal to the tube length. With different height packing of the tubes, the two outer legs of the terminals must be correspondingly longer.
- the w-shaped spacers / clamps are inserted at the bottom and top of each pipe end. At the top and bottom because 6 spacers per tube inserted, each with 1 spacer 2 tubes to the distance s holds.
- the central spacer bars can be made longer with the width dimension s, for example 5 x D or 10 x D long. They can also be so long that the lower and upper central bars just touch each other in the middle of the tube, so that a closed gusset channel is formed.
- the spacers can be made simple, z. B. by punching sheet metal or thin plastic plates. Depending on the required medium and temperature resistance, the materials may be made of plastics such as PE, PP, PVDF, PTFE, PVC, or of metals such as aluminum, stainless steel, titanium.
- a tailored to the particular application distance calculation on known fluid pressure loss calculations supports the interpretation of a tube bundle.
- the performance of the tube separator / tube collector is exemplified in FIG.
- the example shows the experimentally determined curves for the number concentration in cm "3 and the fractional separation degree in%, both above the particle size Xm in ⁇ m
- the flow rate was 500 Bm3 / h
- the fractional separation efficiency is already over 90% and the quality of the clean gas already excellent From a particle size of 1 ⁇ m, the conditions are almost ideal.
Landscapes
- Electrostatic Separation (AREA)
- Sampling And Sample Adjustment (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004023967A DE102004023967B3 (de) | 2004-05-14 | 2004-05-14 | Röhrenkollektor zur Abscheidung elektrisch geladener Aerosole aus einem Gasstrom |
| PCT/EP2005/003357 WO2005099904A1 (de) | 2004-05-14 | 2005-03-31 | Röhrenkollektor zur abscheidung elektrisch geladener aerosole aus einem gasstrom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1735101A1 true EP1735101A1 (de) | 2006-12-27 |
| EP1735101B1 EP1735101B1 (de) | 2008-09-10 |
Family
ID=34963313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05716464A Expired - Lifetime EP1735101B1 (de) | 2004-05-14 | 2005-03-31 | Röhrenkollektor zur abscheidung elektrisch geladener aerosole aus einem gasstrom |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7682427B2 (de) |
| EP (1) | EP1735101B1 (de) |
| JP (1) | JP4833964B2 (de) |
| AT (1) | ATE407739T1 (de) |
| DE (2) | DE102004023967B3 (de) |
| WO (1) | WO2005099904A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005045010B3 (de) * | 2005-09-21 | 2006-11-16 | Forschungszentrum Karlsruhe Gmbh | Elektrostatische Ionisierungsstufe in einer Abscheidungseinrichtung |
| CA2773620C (en) | 2009-09-09 | 2016-01-12 | Turbosonic Inc. | Assembly of wet electrostatic precipitator |
| ITPI20100003A1 (it) * | 2010-01-14 | 2011-07-15 | Re Co 2 S R L | Metodo e apparato per rimuovere particolato solido da un gas, in particolare da fumi di combustione di un combustibile fossile solido |
| US8608838B2 (en) * | 2010-01-22 | 2013-12-17 | Yau Lee Innovative Technology, Ltd. | Tubing air purification system |
| CN101804384B (zh) * | 2010-03-09 | 2012-01-25 | 聊城市鲁西化工工程设计有限责任公司 | 格栅式横向进风紊流式电除尘器 |
| BR112013024727B1 (pt) | 2011-03-28 | 2021-01-19 | Megtec Turbosonic Inc. | eletrodo de coleta para um precipitador eletrostático úmido |
| US11027289B2 (en) | 2011-12-09 | 2021-06-08 | Durr Systems Inc. | Wet electrostatic precipitator system components |
| DE102015103759A1 (de) * | 2015-03-13 | 2016-09-15 | Steuler Korrosionsschutz Holding GmbH | Niederschlagsrohrbündel für einen Nasselektrofilter sowie Nasselektrofilter |
| JP7205413B2 (ja) * | 2019-08-07 | 2023-01-17 | 株式会社Sumco | レーザマーク付きシリコンウェーハの製造方法 |
| CA3177899A1 (en) * | 2020-06-02 | 2021-04-29 | Durr Systems, Inc. | Wesp collection electrode insert or extension |
| CN112958283B (zh) * | 2021-02-05 | 2024-12-10 | 山东海林环保设备工程有限公司 | 一种新型节能湿电除尘器阳极管模块 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1361905A (en) * | 1971-06-18 | 1974-07-30 | Metallgesellschaft Ag | Earthing device for an electrostatic precipitator |
| DE2134576C3 (de) * | 1971-07-10 | 1975-10-30 | Metallgesellschaft Ag, 6000 Frankfurt | Röhre n-NaBelektroabscheider |
| US4072477A (en) * | 1972-05-11 | 1978-02-07 | The Regents Of The University Of California | Electrostatic precipitation process |
| DE2641114C3 (de) * | 1976-09-13 | 1981-05-14 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur Herstellung eines Kunststoff-Elektrofilters in Wabenform |
| US4247307A (en) * | 1979-09-21 | 1981-01-27 | Union Carbide Corporation | High intensity ionization-wet collection method and apparatus |
| JPH04187254A (ja) * | 1990-11-19 | 1992-07-03 | Mitsubishi Heavy Ind Ltd | ダクト型電気集じん器の集じん電極製作方法 |
| DE4123617C2 (de) * | 1991-07-17 | 1995-07-06 | Metallgesellschaft Ag | Vorrichtung zum Transport von Stoffen |
| US5254155A (en) * | 1992-04-27 | 1993-10-19 | Mensi Fred E | Wet electrostatic ionizing element and cooperating honeycomb passage ways |
| DE19833226C1 (de) * | 1998-07-23 | 2000-04-20 | Steuler Industriewerke Gmbh | Niederschlagsrohrbündel für Naßelektrofilter |
| DE10132582C1 (de) * | 2001-07-10 | 2002-08-08 | Karlsruhe Forschzent | Anlage zum elektrostatischen Reinigen von Gas und Verfahren zum Betreiben derselben |
| US6579349B1 (en) * | 2002-04-08 | 2003-06-17 | Chein-Bang Ting | Electrostatic precipitator |
| DE10244051C1 (de) | 2002-09-21 | 2003-11-20 | Karlsruhe Forschzent | Ionisator und seine Verwendung in einer Abgasreinigungsanlage für tropfenbeladene und/oder kondensierende Feuchtgase |
| DE102005023521B3 (de) * | 2005-05-21 | 2006-06-29 | Forschungszentrum Karlsruhe Gmbh | Nasselektrostatische Ionisierungsstufe in einer elektrostatischen Abscheideeinrichtung |
-
2004
- 2004-05-14 DE DE102004023967A patent/DE102004023967B3/de not_active Expired - Fee Related
-
2005
- 2005-03-31 EP EP05716464A patent/EP1735101B1/de not_active Expired - Lifetime
- 2005-03-31 WO PCT/EP2005/003357 patent/WO2005099904A1/de not_active Ceased
- 2005-03-31 AT AT05716464T patent/ATE407739T1/de active
- 2005-03-31 DE DE502005005333T patent/DE502005005333D1/de not_active Expired - Lifetime
- 2005-03-31 US US11/578,583 patent/US7682427B2/en not_active Expired - Fee Related
- 2005-03-31 JP JP2007507690A patent/JP4833964B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005099904A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE407739T1 (de) | 2008-09-15 |
| US20070283903A1 (en) | 2007-12-13 |
| JP2008504946A (ja) | 2008-02-21 |
| JP4833964B2 (ja) | 2011-12-07 |
| EP1735101B1 (de) | 2008-09-10 |
| US7682427B2 (en) | 2010-03-23 |
| WO2005099904A1 (de) | 2005-10-27 |
| DE102004023967B3 (de) | 2005-12-08 |
| DE502005005333D1 (de) | 2008-10-23 |
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