EP0600011B1 - Precipitateur electrostatique humide - Google Patents

Precipitateur electrostatique humide Download PDF

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Publication number
EP0600011B1
EP0600011B1 EP92918939A EP92918939A EP0600011B1 EP 0600011 B1 EP0600011 B1 EP 0600011B1 EP 92918939 A EP92918939 A EP 92918939A EP 92918939 A EP92918939 A EP 92918939A EP 0600011 B1 EP0600011 B1 EP 0600011B1
Authority
EP
European Patent Office
Prior art keywords
liquid
gas
electrodes
accumulator tank
stage
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
EP92918939A
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German (de)
English (en)
French (fr)
Other versions
EP0600011A1 (fr
Inventor
Charles Eyraud
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Ecoprocess SARL
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Ecoprocess SARL
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Publication of EP0600011A1 publication Critical patent/EP0600011A1/fr
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    • 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
    • B03C3/32—Transportable units, e.g. for cleaning room air
    • 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
    • B03C3/014—Addition of water; Heat exchange, e.g. by condensation
    • 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
    • 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
    • B03C3/88—Cleaning-out collected particles

Definitions

  • the structural and operational elements of an electrostatic reactor according to the invention are: the gas treatment line, the spray field, the module, the hopper field, the accumulation tank, the extraction tank, the concentration field, residence time, transfer liquid, electric field, liquid processing line.
  • the "gas treatment line” or “effect line” is formed by the succession of spray fields at the level of which the transfers and reactions take place between the gas and the liquid mist, from entry to exit from the device.
  • a "spray field” is the space occupied by a group of electrodes sprayed frontally with a curtain of liquid finely dispersed by sprayer booms distributed in a plane perpendicular to the gas flow. It corresponds to an "effect" of the gas-liquid transfer.
  • additional spraying is carried out at the top of a group of flat electrodes using the same liquid as that of front spraying.
  • the composition of the spray liquid can be the same for all the spray fields flowing in the same accumulation tank. It can be different if an additional chemical reagent is brought directly to the injection ramps, or if the spraying is carried out totally or partially using a liquid coming either from the contiguous accumulation tank or from a tank any extraction after purification.
  • the first case offers the possibility of optimizing the treatment of gas with a particular reagent at a single spray field
  • the second case is a contribution to reflux by a route other than that of the direct transport of liquid from a accumulation tank to the next
  • the third case has the advantage of reducing entrainment by gases, from one spray field to another, pollutants contained in excessively concentrated liquid vesicles.
  • the “concentration field”, which ends with an extraction tank, is the section of apparatus to which the concentration of certain transfer pollutants by liquid-gas reflux contact with multiple stages is allocated. It therefore includes several hopper fields, that is to say several accumulation tanks materializing the stages.
  • the electrostatic reactor according to the invention necessarily has at least one concentration field.
  • a “sequential residence time” is the average time it takes the gas to travel through a particular section of the treatment line: spray field, hopper field, concentration field or gas treatment line.
  • spray field hopper field
  • concentration field or gas treatment line In the case of dusting it varies proportionally to the "volume area of electrodes of the corresponding section", ie of the area of electrodes contained in this section by normal cubic meters of gas passing through the device in one hour .
  • modular construction it can be varied by assigning more or less modules in series or in parallel to a particular processing sequence. If the residence time necessary to remove a gaseous pollutant is greater than that necessary for the electrostatic precipitation of the dust which accompanies it, a gas washer (not electrostatic) can be placed at the head or tail of the electric purifier. We thus have the number of degree of freedom necessary to adjust the characteristics of the purifier according to the speeds of the chemical reactions in question and the anti-pollution standards in force.
  • composition of the "transfer liquid”, in either a nebulized or a runoff state collected in accumulation tanks, varies along the gas treatment line due, on the one hand, to the specificity of the reactions in question.
  • other part of the multistage concentration and gas-liquid counter-current achieved either by direct transport of the liquid from one accumulation tank to the next or by continuous or discontinuous partial spraying of a group of electrodes by means of the liquid from the accumulation tank of the adjoining floor or from a racking and purification operation carried out at the level of an extraction tank; during the spraying sequence the end of the group of electrodes is properly washed, but part of the liquid mist and the pollutants it contains are entrained from one stage to the next by convection, an effect unfavorable to a high concentration of sludge and to a thorough purification of the gas; during the spraying stop sequence the drops are electrostatically precipitated on the floor where they are produced and therefore do not participate in the re-training of impurities conveyed by the liquid mist.
  • the composition can also vary from one spray field to another if reagents are introduced directly into the spray bars in addition to those introduced into the tanks.
  • the composition of the "spray liquid" is determined by the nature and kinetics of the transfer reactions which are assigned to a spray field, a hopper field, or a concentration field. It is most generally a water containing soluble reagents, reactive or inert solids in the dispersed state, catalysts, optionally ionic or nonionic surfactants or even oleophilic emulsified substances.
  • the "liquid processing line” is that of the physical and chemical operations carried out on the concentrated liquids drawn off at the level of the extraction tanks in view on the one hand to eliminate undesirable products on the other hand to partially or totally recycle, at suitably chosen points of the gas treatment line, washing liquids thus totally or partially purified, and optionally regenerated reagents.
  • Figure 1 is a longitudinal vertical sectional view of a wet electrofilter with liquid-gas counter-current.
  • Figure 2 is a top view of the electrostatic filter shown in the previous figure.
  • Figure 3 is a vertical sectional view of a spray field with vertical booms and horizontal booms, the runoff of the electrodes being collected by two hoppers in a single accumulation tank constituting one of the stages for concentrating a flat wet electrostatic precipitator against liquid-gas counter-current.
  • FIG. 1 and FIG. 2 show diagrammatically and in section, respectively vertical and horizontal, an apparatus with plane geometry with three "electric fields” 46, 47, and 48. It consists of an envelope 44, four spray fields 5, 6, 7, 8, three hopper fields 9, 10, 11, the first two 9 and 10 each consisting of a single spray field, the third 11 of two spray fields, 7 and 8. All the spray fields have three "streets” such as 12 and are each watered by vertical ramps such as 13. Other ramps such as 19 ensure the saturation in water vapor of the gas entering the device. These spray bars 19 can advantageously be part of a head stage assigned to the drying of the sludge by the sensible heat of the gas in order to finally obtain solid or pasty products.
  • Two accumulation tanks 17 and 18 participate in a two-stage concentration field, the reflux of which passes through the tube 30, the tank 17 being an extraction tank as well as the tank 16. Ceramic or silica pieces 33 support the emissive electrodes and isolate them from the earth 45.
  • 20 is the arrival of the gas.
  • 21 is the gas extractor.
  • 22 is the arrival of the recycled liquid after its purification in the liquid treatment line, or that of the process make-up liquid.
  • the reagents are introduced into the accumulation tanks at 23, and possibly and for some of them directly into the spray bars at 24. The undesirable products are eliminated in the liquid treatment line made up of the separation units 25 and 26 operating on the withdrawals from the extraction tanks 16 and 17.
  • the tanks 16 17 and 18 may possibly participate in the reflux concentration of certain pollutants not removed at 26 if the incompletely purified liquid is transported by the line 27 to the accumulation tank 16.
  • the three hopper fields represent a reflux concentration field for these particular pollutants.
  • the undesirable products are extracted from the liquid processing line at 31, and 32, in the form of solid precipitates which may be recoverable, highly concentrated sludge intended for landfill, industrially recyclable solutions, or purified liquid totally or partially recycled in the gas treatment line by pipes such as 22, 28, 27 or 29.
  • FIG. 3 represents the single spray field of a hopper field 10 (itself belonging to a reflux concentration field of at least three stages 16, 17, 18), including the ramps of spraying are of three types: vertical booms 13 disposed frontally in front of the group of planar electrodes 6, booms horizontal 14, watering the first part of the group of electrodes 6 from the top, and supplied with the same recycled liquid from the accumulation tank 17, horizontal ramps 15 watering, continuously or discontinuously, the second part of the group of electrodes 6 also from the top, but supplied by the liquid coming from the accumulation tank 18.
  • This third type of ramps when it exists, constitutes one of the ways of the liquid reflux from stage 11 to stage 9, the other reflux path being that of the pipe 30 which brings directly, by gravity or by means of a pump, the liquid from the tank 18 to the tank 16. 43 is the direction of the gas flow.
  • the reactor includes a hopper field or a final module intended for the cumulative analysis of traces of harmful products, the continuous dosing of which becomes impossible in the event of excessively strict standards
  • the reactor constitutes a mobile unit for cumulative analysis of industrial gaseous effluents.
EP92918939A 1991-08-21 1992-08-20 Precipitateur electrostatique humide Expired - Lifetime EP0600011B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9110616A FR2680474B1 (fr) 1991-08-21 1991-08-21 Reacteur electrostatique a contacts gaz liquide solide a contre courant gaz liquide et a etages multiples pour l'epuration d'un gaz et des liquides de transfert.
FR9110616 1991-08-21
PCT/FR1992/000811 WO1993003849A1 (fr) 1991-08-21 1992-08-20 Precipitateur electrostatique humide

Publications (2)

Publication Number Publication Date
EP0600011A1 EP0600011A1 (fr) 1994-06-08
EP0600011B1 true EP0600011B1 (fr) 1996-11-13

Family

ID=9416392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918939A Expired - Lifetime EP0600011B1 (fr) 1991-08-21 1992-08-20 Precipitateur electrostatique humide

Country Status (10)

Country Link
US (1) US5624476A (ja)
EP (1) EP0600011B1 (ja)
JP (1) JPH06509976A (ja)
AT (1) ATE145157T1 (ja)
CA (1) CA2115987C (ja)
DE (1) DE69215229T2 (ja)
ES (1) ES2094368T3 (ja)
FR (1) FR2680474B1 (ja)
OA (1) OA09886A (ja)
WO (1) WO1993003849A1 (ja)

Cited By (1)

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KR101885240B1 (ko) * 2017-10-20 2018-08-03 주식회사 애니텍 배기가스에 포함된 입자상 물질 제거를 위한 정전 분무 방식의 전기 집진 시스템

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US20030206837A1 (en) 1998-11-05 2003-11-06 Taylor Charles E. Electro-kinetic air transporter and conditioner device with enhanced maintenance features and enhanced anti-microorganism capability
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US7695690B2 (en) 1998-11-05 2010-04-13 Tessera, Inc. Air treatment apparatus having multiple downstream electrodes
US6156098A (en) * 1999-02-10 2000-12-05 Richards; Clyde N. Charged droplet gas scrubber apparatus and method
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US20020001726A1 (en) * 1999-12-27 2002-01-03 Kimberly-Clark Worldwide, Inc. Modified siloxane yielding transferring benefits from soft tissue products
US6488740B1 (en) * 2000-03-01 2002-12-03 Electric Power Research Institute, Inc. Apparatus and method for decreasing contaminants present in a flue gas stream
US7724492B2 (en) 2003-09-05 2010-05-25 Tessera, Inc. Emitter electrode having a strip shape
US7906080B1 (en) 2003-09-05 2011-03-15 Sharper Image Acquisition Llc Air treatment apparatus having a liquid holder and a bipolar ionization device
US7767169B2 (en) 2003-12-11 2010-08-03 Sharper Image Acquisition Llc Electro-kinetic air transporter-conditioner system and method to oxidize volatile organic compounds
US20060016333A1 (en) 2004-07-23 2006-01-26 Sharper Image Corporation Air conditioner device with removable driver electrodes
CA2584217C (en) * 2004-10-29 2012-05-22 Eisenmann Corporation Natural gas injection system for regenerative thermal oxidizer
CA2624603A1 (en) * 2005-02-24 2006-08-31 Gary C. Tepper Contaminant extraction systems, methods and apparatuses
WO2006094174A2 (en) * 2005-03-02 2006-09-08 Eisenmann Corporation Dual flow wet electrostatic precipitator
US7297182B2 (en) * 2005-03-02 2007-11-20 Eisenmann Corporation Wet electrostatic precipitator for treating oxidized biomass effluent
WO2006113639A2 (en) * 2005-04-15 2006-10-26 Eisenmann Corporation Method and apparatus for flue gas desulphurization
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JP4111229B2 (ja) * 2006-05-19 2008-07-02 ダイキン工業株式会社 放電装置及び空気浄化装置
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Also Published As

Publication number Publication date
EP0600011A1 (fr) 1994-06-08
CA2115987C (fr) 1998-11-03
JPH06509976A (ja) 1994-11-10
OA09886A (fr) 1994-09-15
FR2680474B1 (fr) 1995-09-08
CA2115987A1 (fr) 1993-03-04
DE69215229T2 (de) 1997-03-06
FR2680474A1 (fr) 1993-02-26
DE69215229D1 (de) 1996-12-19
WO1993003849A1 (fr) 1993-03-04
ATE145157T1 (de) 1996-11-15
ES2094368T3 (es) 1997-01-16
US5624476A (en) 1997-04-29

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