EP1604742B1 - Gaszuführung für Elektrofilter und Elektrofiltervorrichtung - Google Patents

Gaszuführung für Elektrofilter und Elektrofiltervorrichtung Download PDF

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Publication number
EP1604742B1
EP1604742B1 EP04013364A EP04013364A EP1604742B1 EP 1604742 B1 EP1604742 B1 EP 1604742B1 EP 04013364 A EP04013364 A EP 04013364A EP 04013364 A EP04013364 A EP 04013364A EP 1604742 B1 EP1604742 B1 EP 1604742B1
Authority
EP
European Patent Office
Prior art keywords
vortex
gas
arrangement
flow
gas feed
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.)
Expired - Lifetime
Application number
EP04013364A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1604742A1 (de
Inventor
Thomas Davis
Stefan Leser
Michael Kaatz
Hans Ruscheweyh
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.)
Balcke Duerr GmbH
Original Assignee
Balcke Duerr 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 Balcke Duerr GmbH filed Critical Balcke Duerr GmbH
Priority to ES04013364T priority Critical patent/ES2351980T3/es
Priority to DK04013364.7T priority patent/DK1604742T3/da
Priority to PT04013364T priority patent/PT1604742E/pt
Priority to PL04013364T priority patent/PL1604742T3/pl
Priority to SI200431545T priority patent/SI1604742T1/sl
Priority to AT04013364T priority patent/ATE483524T1/de
Priority to DE502004011737T priority patent/DE502004011737D1/de
Priority to EP04013364A priority patent/EP1604742B1/de
Priority to US10/910,638 priority patent/US6964698B1/en
Priority to CN200510007500A priority patent/CN100577301C/zh
Priority to ZA200504241A priority patent/ZA200504241B/xx
Priority to CA002508257A priority patent/CA2508257C/en
Priority to TW094117132A priority patent/TWI291372B/zh
Priority to AU2005202330A priority patent/AU2005202330B2/en
Priority to MXPA05005879A priority patent/MXPA05005879A/es
Priority to UAA200505390A priority patent/UA80165C2/uk
Priority to RU2005117219/12A priority patent/RU2298438C2/ru
Priority to KR1020050048599A priority patent/KR100722341B1/ko
Priority to JP2005167283A priority patent/JP4390746B2/ja
Publication of EP1604742A1 publication Critical patent/EP1604742A1/de
Application granted granted Critical
Publication of EP1604742B1 publication Critical patent/EP1604742B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/013—Conditioning by chemical additives, e.g. with SO3
    • 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

Definitions

  • the invention relates to a gas supply for an electrostatic precipitator according to the preamble of claim 1 and an electrostatic filter device comprising an electrostatic precipitator and a gas supply.
  • Electrostatic precipitators are used, inter alia, in incinerators, power plants, or in industrial plants with furnaces such as cement, lime, gypsum, iron, or steelmaking, for difficult-to-deposit solid articles such as fine dust particles from an air, flue gas, or more generally to filter out a gas flow.
  • the gas flow is passed through an electric field in which accumulate electrons released by electrodes to the dust particles, migrate together with the dust particles in the direction of precipitation electrodes and deposited there.
  • an electrostatic filter For an electrostatic filter to be able to clean the gas in the greatest possible degree of efficiency, it must be flowed through or flowed through as uniformly as possible. A non-optimal flow leads to an uneven distribution of the dust, the temperature or the flow velocity in the gas flow, resulting in a reduced degree of separation and thus a non-optimal cleaning effect. Also, due to these uneven flow distributions can easily form particle deposits that gradually reduce the flow area of the electrostatic precipitator and lower its efficiency.
  • an electrostatic filter device usually has a gas supply arranged in front of the electrostatic filter, which directs the gas to be filtered as uniformly as possible to and into the filter.
  • the gas supply generally comprises a flow channel through which the gas flows in the direction of the filter, and a gas inlet hood which widens in a funnel shape from the inflow channel in the opposite direction to the electrostatic filter.
  • the gas inlet hood thus has a small cross-sectional area at its forward cross section in the flow direction, which corresponds to that of the inflow channel, and at its in the flow direction behind lying cross-section on a large cross-sectional area, which corresponds substantially to that of the electrostatic precipitator.
  • At least one flow distributor is normally arranged in the gas supply directly in front of the electrostatic precipitator in the widened region of the gas inlet hood.
  • These flow distributors are usually gas distribution devices in the form of perforated plates, which are often arranged in several layers one behind the other.
  • conditioning agents are mixed into the gas stream in the gas feed with the aid of an admixing device. This is once a cooling conditioning in which water is sprayed into the gas flow to cool the gas. Often, the gas is conditioned without lowering the gas temperature by SO 3 , NH 3 , water vapor or the like, among other things, to reduce the electrical dust resistance are injected into the gas to be filtered.
  • the admixing device usually has a plurality of nozzles arranged in the gas supply.
  • the invention is therefore based on the object to improve the efficiency of electrostatic filter devices.
  • the invention initially relates to the gas supply for an electrostatic precipitator of an electrostatic precipitator device, since, according to studies by the inventor, particularly great potential for improvement with regard to the efficiency of the electrostatic precipitator device is present especially in the region of the supply of the gas to the filter.
  • This is a generally known gas supply, which has a Anströmkanal with a constant cross-sectional area, a gas inlet hood with in the direction of the electrostatic filter alsweitender cross-sectional area and a Zumischvoriques for a conditioning agent.
  • At least one flow distributor is arranged in the expanded cross-sectional area.
  • the gas supply according to the invention now differs from the known gas feeds in that a first vortex vortex generating vortex device in the inflow, a second vortex vortex generating vortex device in the gas inlet hood in the gas flow direction in front of the flow distributor and the admixing device in the region of one of the two vortexers is arranged.
  • These vortex devices are basically known mounting elements, as described, for example, in US Pat EP 0638732 A1 have already been described for a diffuser.
  • Vortices also referred to as wake vortices
  • wake vortices can be thought of as small tornadoes directed in the direction of flow, the diameters of which increase in the direction of flow.
  • the vortices rotate from the side edges of the vortex device initially outward and then roll inward, causing opposite vortex rotate in opposite directions. If one looks downstream on such a vortex device, then the leading edge vortices look like two worms rolling in opposite directions.
  • leading edge vortices have the advantage that they are extremely stable vortex systems, which lead to a particularly effective mixing of the gas flow. This makes it possible that a largely uniform turbulent flow behavior forms behind such a vortex device that adjusts almost independently of the amount of gas flowing straight through. Thus, such vortex devices do not have to be constantly adapted to fluctuating gas quantities.
  • static mixers Because of these good mixing properties, the vortex vortex generating vortex devices have been used, in particular in diffusers, to completely replace conventional deflectors, baffles or perforated plates used for flow distribution or deflection.
  • the vortex devices are now also used in the extremely expanding gas inlet hood of a gas supply for an electrostatic precipitator, but different than before not used to completely replace the flow-distributing mounting elements, ie flow distributor, but only to improve their flow at least partially.
  • the vortex devices due to their obliquely arranged in the flow direction arrangement, the vortex devices have only a very small projection surface in the flow direction with a high turbulence effect, whereby the pressure losses are greatly reduced.
  • the strong turbulence results in the particles moving strongly and no longer depositing as easily as before. The turbulence at the same time dust strands are dissolved and distributed, so that the dust particle distribution is made uniform.
  • the flow distribution to the electrostatic precipitator can already take place with a single perforated sheet layer. This reduces the mounting surfaces in the gas supply, and the efficiency of the electrostatic precipitator or the electrostatic precipitator device is significantly increased overall, while the basically estimated advantageous flow of the electrostatic precipitator can be maintained via a perforated plate.
  • the gas supply according to the invention is characterized in that a vortex device is arranged in the inflow channel with at least approximately constant cross section.
  • a vortex device is arranged in the inflow channel with at least approximately constant cross section.
  • the preferred arrangement of the first vortex device in the inflow channel produces a sufficiently advantageous flow distribution, especially in the case of electrostatic precipitators, when a further vortex device and a flow distributor, ie a perforated plate, subsequently follow.
  • This makes it possible, for example, with the aid of simple or conventional baffles to direct the already basically turbulent and well-mixed gas flow in the gas inlet hood in the direction of the flow distributor, which then ensures the uniform flow through the electrostatic precipitator.
  • the admixing device is arranged in the region of one of the two vortex devices. So you can use the powerful leading edge vortex for effective mixing of a conditioning agent in the gas stream. Due to the flow direction Spreading leading edge eddy systems thus results in a punctual injection particularly good mixing of the conditioning over the flow cross-section away.
  • the first vortex device is arranged in the main flow direction in front of a curvature of the inflow channel. This has the advantage that the first vortex device is also used for deflecting the gas flow in the direction of curvature of the inflow channel.
  • the first vortex device is expediently closer to the inner side of the inflow duct than to its outer side of curvature, that is to say arranged asymmetrically on the inner side of the curvature with respect to the center of the inflow channel.
  • the flow on the inside of an increased flow energy is supplied, which enables the flow to better follow the sharp deflection of the inner edge.
  • the second vortex device it is thus possible to achieve a virtually separation-free deflection in the filter hood, which significantly improves the flow distribution.
  • the first vortex device can be arranged at an angle in the inflow channel in such a way that the leading edge of its at least one inflow surface faces the gas flow in the direction of the curvature inside and the trailing edge points toward the curvature outside of the inflow channel.
  • the first vortex device is arranged at an angle in the inflow channel, so that the inflow edge of its facing the gas flow has at least one inflow surface in the direction of the curvature outside and the trailing edge to the curvature inside of the inflow channel.
  • the leading edge is the edge of the vortex device, which faces the gas flow and the trailing edge is the edge which faces away from the flow.
  • Vorderkantenwirbelsystem results in the trailing edge, which extends very far in the region of the curvature outside of the inflow channel.
  • the second vortex device is arranged in a lower region of the gas inlet hood.
  • the air flow diverted in the horizontal direction due to a curvature is again passed through the second vortex device steered in a more horizontal direction.
  • the vortex device thus serves not only as a means for mixing but also as a deflection.
  • the second vortex device is arranged at an acute angle to a wall of the gas inlet hood.
  • An acute angle is understood to mean an angle of less than 45 ° and more than 0.5 °.
  • the admixing device opens behind the leading edge of a vortex device.
  • very simple Zumischvorraumen can be used, such as a simple pipe socket, which opens behind the leading edge of a vortex device. Due to the forming at the leading edge strong and widening in the flow direction vortices vortex, so there is a very good mixing of exiting through the pipe stub conditioning with the gas flowing past even with only selective admixture.
  • embodiments are expedient in which the admixing device is attached directly to the vortex device.
  • a whirling device should have at least one vertebral disc.
  • Spinal discs are well known and can be circular, elliptical, rectangular or even delta-wing-shaped, with discs in straight or kinked embodiment or in triangular or teardrop-shaped cross-sectional embodiments are suitable.
  • a vortex device has a plurality of side-by-side arranged in a flow cross-section vertebrae.
  • the vertebrae can be linked together or individually attached to the wall individually.
  • Also can be formed like a chain around the entire cross-section running vortex devices. This means that in each case at least one vortex disc is arranged at the top, bottom, left and right in the case of a rectangular inflow channel.
  • a vortex device preferably has a plurality of cascading arranged vortex discs.
  • Cascading here means a functional sequence of successively arranged vertebral discs. These thus represent a staircase-shaped image again, with obliquely or diagonally offset arrangements of the individual vertebrae are conceivable. It is only important that the gas flow is forwarded from one vortex disc to the next, whereby an optimal induction effect occurs.
  • a whirling device comprises a system of several intervertebral discs.
  • a vortex plate system may for example consist of a plurality of vortex discs, which are arranged on a common pivot axis.
  • several vertebrae can be changed together in a mutually firmly defined functional relationship in their mode of action, for example by turning or pivoting.
  • an electrostatic filter device having an electrostatic precipitator and a gas supply according to one of the previously described embodiments and further developments.
  • This electrostatic precipitator device is characterized in particular by the use of intervertebral discs in the manner described above, resulting in the advantages already described in the preceding embodiments of the gas supply.
  • the electrostatic filter device 1 has an electrostatic precipitator 2, a gas inlet 3 and a gas outlet 4.
  • the gas supply 3 is flowed through during operation of the electrostatic filter device 1 by a gas stream 5 to be filtered, which deflects it from a vertical to a substantially horizontal direction and on directs the filter 2.
  • the gas stream 5 to be filtered is then freed of particles contained therein by the electrical processes already explained above and exits via the gas outlet 4 as a filtered gas stream 6 from the electrostatic filter device 1.
  • the gas supply 3 thus includes in the embodiment shown here a vertical inflow channel 7 with a substantially constant flow cross-section. At the inflow duct 7, a curvature 9 of the inflow channel adjoins in the main flow direction. In this case, the gas flow 5 to be filtered changes its flow direction from a vertical to a horizontal direction.
  • the curved Anströmkanalabites 9 then follows the gas inlet hood 8, which widens in the direction of the filter 2 in its cross section.
  • the flow distributor 10 which is a simple perforated plate here.
  • both vortex devices are each a single circular vortex plate that has an inflow surface 13 on its side facing the gas flow.
  • the inflow surface 13 in this case connects the upstream directed inflow edge 14 and the downstream spoiler edge 15.
  • the first vortex plate 11 is arranged in front of the curvature 9 so that the inflow surface 13 extends in the flow direction from the curvature outer side 21 to the curvature inner side 22 of the curvature 9.
  • the curvature outside 21 is thus the obliquely upward-standing plate, while the curvature inside 22 corresponds to the corner or the transition between inflow channel 7 and gas inlet cap 8.
  • the first vortex plate 11 is arranged so that the leading edge 14 is directed downward, ie against the gas flow to be filtered 5, and the tear-off edge 15 faces upward.
  • the inflow surface 13 thus extends in the illustrated longitudinal section of the leading edge 14 obliquely upward to the trailing edge 15th
  • baffles 18 For uniform deflection of the gas flow 5 from the vertical in the direction of the horizontal are located in the gas inlet hood 8 at the top of baffles 18 conventional curved design. They merely supplement the change in direction of the gas flow already generated by the vortex device 11 and in particular do not serve to swirl.
  • a pipe stub 19 is arranged in the inflow duct 7, specifically in the region of the inflow edge 14 of the first vortex plate 11, through which a conditioning agent 20 can be injected into the inflow channel. Due to the strong turbulence of the gas flow in the downstream spreading vortex 16 so there is a particularly good mixing of the gas with the conditioning agent 20, so that a complex Mehrdüsige admixing can be omitted. This lowers flow resistance and manufacturing costs and makes the admixing device 19 less prone to disturbances resulting, for example, from dust deposits.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrostatic Separation (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Pipe Accessories (AREA)
  • Ventilation (AREA)
  • Separating Particles In Gases By Inertia (AREA)
EP04013364A 2004-06-07 2004-06-07 Gaszuführung für Elektrofilter und Elektrofiltervorrichtung Expired - Lifetime EP1604742B1 (de)

Priority Applications (19)

Application Number Priority Date Filing Date Title
ES04013364T ES2351980T3 (es) 2004-06-07 2004-06-07 Suministro de gas para precipitador electrostático y precipitador electrostático.
DK04013364.7T DK1604742T3 (da) 2004-06-07 2004-06-07 Gastilførsel til elektrofilter og elektrofilterindretning
PT04013364T PT1604742E (pt) 2004-06-07 2004-06-07 Alimentação de gás para electrofiltro e dispositivo de electrofiltro
PL04013364T PL1604742T3 (pl) 2004-06-07 2004-06-07 Doprowadzenie gazu do elektrofiltra i urządzenie elektrofiltracyjne
SI200431545T SI1604742T1 (sl) 2004-06-07 2004-06-07 Dovod plina za elektrofilter in elektrofiltrsko napravo
AT04013364T ATE483524T1 (de) 2004-06-07 2004-06-07 Gaszuführung für elektrofilter und elektrofiltervorrichtung
DE502004011737T DE502004011737D1 (de) 2004-06-07 2004-06-07 Gaszuführung für Elektrofilter und Elektrofiltervorrichtung
EP04013364A EP1604742B1 (de) 2004-06-07 2004-06-07 Gaszuführung für Elektrofilter und Elektrofiltervorrichtung
US10/910,638 US6964698B1 (en) 2004-06-07 2004-08-04 Gas supply for electrostatic filter and electrostatic filter arrangement
CN200510007500A CN100577301C (zh) 2004-06-07 2005-02-22 用于静电过滤器的供气装置和静电过滤器装置
ZA200504241A ZA200504241B (en) 2004-06-07 2005-05-24 Gas supply for electrostatic filter and electrostatic filter arrangement
CA002508257A CA2508257C (en) 2004-06-07 2005-05-24 Gas supply for electrostatic filter and electrostatic filter arrangement
TW094117132A TWI291372B (en) 2004-06-07 2005-05-25 Gas supply for electrostatic filter and electrostatic filter arrangement
AU2005202330A AU2005202330B2 (en) 2004-06-07 2005-05-30 Gas supply for electrostatic filters and electrostatic filter arrangement
MXPA05005879A MXPA05005879A (es) 2004-06-07 2005-06-02 Suministro de gas para filtro electrostatico y arreglo de filtro electrostatico.
RU2005117219/12A RU2298438C2 (ru) 2004-06-07 2005-06-06 Трубопровод для подачи газа в электростатический фильтр и система с электростатическим фильтром
UAA200505390A UA80165C2 (en) 2004-06-07 2005-06-06 Gas supply for electrostatic filter and electrostatic filter arrangement
KR1020050048599A KR100722341B1 (ko) 2004-06-07 2005-06-07 정전필터용 가스서플라이 및 정전필터 조립체
JP2005167283A JP4390746B2 (ja) 2004-06-07 2005-06-07 静電フィルタ装置及び静電フィルタの気体供給装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04013364A EP1604742B1 (de) 2004-06-07 2004-06-07 Gaszuführung für Elektrofilter und Elektrofiltervorrichtung

Publications (2)

Publication Number Publication Date
EP1604742A1 EP1604742A1 (de) 2005-12-14
EP1604742B1 true EP1604742B1 (de) 2010-10-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04013364A Expired - Lifetime EP1604742B1 (de) 2004-06-07 2004-06-07 Gaszuführung für Elektrofilter und Elektrofiltervorrichtung

Country Status (19)

Country Link
US (1) US6964698B1 (zh)
EP (1) EP1604742B1 (zh)
JP (1) JP4390746B2 (zh)
KR (1) KR100722341B1 (zh)
CN (1) CN100577301C (zh)
AT (1) ATE483524T1 (zh)
AU (1) AU2005202330B2 (zh)
CA (1) CA2508257C (zh)
DE (1) DE502004011737D1 (zh)
DK (1) DK1604742T3 (zh)
ES (1) ES2351980T3 (zh)
MX (1) MXPA05005879A (zh)
PL (1) PL1604742T3 (zh)
PT (1) PT1604742E (zh)
RU (1) RU2298438C2 (zh)
SI (1) SI1604742T1 (zh)
TW (1) TWI291372B (zh)
UA (1) UA80165C2 (zh)
ZA (1) ZA200504241B (zh)

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DE102017002811A1 (de) 2017-03-22 2018-09-27 Balcke-Dürr GmbH Strömungskanal mit einer Mischvorrichtung

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CN111772269B (zh) * 2020-07-13 2022-06-14 东北大学秦皇岛分校 一种基于柔性超电结构的可循环使用的医用口罩及其制备方法
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DE102017002811A1 (de) 2017-03-22 2018-09-27 Balcke-Dürr GmbH Strömungskanal mit einer Mischvorrichtung

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TW200539945A (en) 2005-12-16
DK1604742T3 (da) 2011-01-03
JP4390746B2 (ja) 2009-12-24
PL1604742T3 (pl) 2011-05-31
US20050268784A1 (en) 2005-12-08
ATE483524T1 (de) 2010-10-15
MXPA05005879A (es) 2006-03-17
TWI291372B (en) 2007-12-21
DE502004011737D1 (de) 2010-11-18
ZA200504241B (en) 2006-10-25
CN1706554A (zh) 2005-12-14
KR20060048237A (ko) 2006-05-18
RU2005117219A (ru) 2006-11-20
AU2005202330B2 (en) 2009-12-03
EP1604742A1 (de) 2005-12-14
UA80165C2 (en) 2007-08-27
CN100577301C (zh) 2010-01-06
JP2006021194A (ja) 2006-01-26
CA2508257A1 (en) 2005-12-07
RU2298438C2 (ru) 2007-05-10
CA2508257C (en) 2008-09-09
AU2005202330A1 (en) 2005-12-22
SI1604742T1 (sl) 2011-01-31
KR100722341B1 (ko) 2007-05-28
PT1604742E (pt) 2010-12-07
US6964698B1 (en) 2005-11-15
ES2351980T3 (es) 2011-02-14

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