EP2535115A1 - Procédé et dispositif de suppression de particules à partir d'un gaz - Google Patents

Procédé et dispositif de suppression de particules à partir d'un gaz Download PDF

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Publication number
EP2535115A1
EP2535115A1 EP11170145A EP11170145A EP2535115A1 EP 2535115 A1 EP2535115 A1 EP 2535115A1 EP 11170145 A EP11170145 A EP 11170145A EP 11170145 A EP11170145 A EP 11170145A EP 2535115 A1 EP2535115 A1 EP 2535115A1
Authority
EP
European Patent Office
Prior art keywords
gas
particles
liquid
pipe
pipeline
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.)
Withdrawn
Application number
EP11170145A
Other languages
German (de)
English (en)
Inventor
Heinrich Böcker
Wolfgang Schieren
Rainer Skroch
Franz Windschmitt
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.)
GEA Bischoff GmbH
Original Assignee
GEA Bischoff 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 GEA Bischoff GmbH filed Critical GEA Bischoff GmbH
Priority to EP11170145A priority Critical patent/EP2535115A1/fr
Priority to PCT/EP2012/061517 priority patent/WO2012172086A1/fr
Publication of EP2535115A1 publication Critical patent/EP2535115A1/fr
Withdrawn legal-status Critical Current

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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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/53—Liquid, or liquid-film, 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/025—Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations
    • 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
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube 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
    • B03C3/02—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
    • B03C3/40—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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/60—Use of special materials other than liquids
    • B03C3/64—Use of special materials other than liquids synthetic resins
    • 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
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/10—Ionising electrode has multiple serrated ends or parts

Definitions

  • the invention relates to a method for removing particles from a gas, in particular from a wet gas and preferably from a wet saturated gas, wherein the gas is passed through at least one pipe, wherein at least in the gas particles present by at least one arranged in the pipeline Ionizing be ionized or electrically charged.
  • the invention further relates to an apparatus for removing particles from a gas, in particular from a wet gas and preferably from a wet saturated gas.
  • the particles are in particular impurity particles which are to be separated from the gas.
  • the term "particles" refers in particular to dusty or liquid particles or aerosols. It is within the scope of the invention that the gas to be purified has a moisture content specified in more detail below.
  • Known particle separation devices often include a plurality of relatively small diameter tubing. This is associated with an undesirably high material usage and relatively high costs. These known devices are also characterized by a disadvantageously high weight. In addition, the maintenance and repair of the devices is problematic due to the large number of small diameter tubing.
  • the invention is the technical problem of providing a method of the type mentioned, in which the above-described disadvantages can be reduced or minimized efficiently.
  • the invention is further based on the technical problem of specifying a corresponding device for removing particles from a gas.
  • the invention teaches a method for removing particles from a gas, in particular from a wet gas and preferably from a wet saturated gas, wherein the gas is passed through at least one pipeline, wherein at least particles present in the gas are ionized or electrically charged by means of at least one ionization electrode arranged in the pipeline and moved to the pipeline wall, wherein the particles are taken up and removed from the pipeline wall by a liquid film present on the pipeline wall, wherein the maximum diameter of the pipeline is 500 mm to 2500 mm, preferably 900 mm to 1500 mm and wherein a voltage applied to the ionizing electrode of 80 kV to 350 kV, preferably from 100 kV to 250 kV is used.
  • the maximum diameter of the pipeline is preferably 1000 to 1500 mm, very preferably 1000 to 1350 mm and particularly preferably more than 1000 mm.
  • - Diameter of a pipeline meant in the context of the invention, in particular the inner diameter of a pipeline.
  • Empfohleneimi have all the pipes of a pipe bundle the same diameter or the same maximum diameter or substantially the same diameter or substantially the same maximum diameter.
  • the term maximum diameter was chosen in particular to make it clear that in a pipeline with respect to a cross-section of the pipeline of different diameters, the largest or maximum diameter is meant. This applies, for example, to a pipeline with a hexagonal cross-section. In the case of a pipeline with an exactly circular cross section, the maximum diameter then corresponds to the same diameter with respect to a cross section of the pipeline everywhere. It is otherwise within the scope of the invention that a pipeline over its length has the same diameter or a substantially same diameter.
  • the voltage applied to the ionization electrode is preferably more than 100 kV, preferably 105 kV to 250 kV, and particularly preferably 110 kV to 250 kV.
  • An embodiment of the invention is characterized in that working with a voltage applied to the ionizing electrode of more than 110 kV.
  • the particles to be removed from the gas are, in particular, solid or liquid contaminant particles contained in the gas, such as, for example, dust and sulfuric acid aerosols.
  • the claimed in claim 1 feature, according to which "at least" the particles to be removed from the gas to be electrically charged, it is expressed that in principle all gas particles contained in the gas or gas molecules or the belonging to the gas gas particles or gas molecules ionized or can be charged electrically and can be moved to the pipe wall. It is within the scope of the invention that only or primarily the particles or impurity particles to be removed from the gas are taken up by the liquid film on the pipe wall and transported away.
  • the particles are either dissolved in the liquid of the liquid film and transported away in the form of a solution or solid particles are transported away with the liquid of the liquid film in the form of a suspension. It is recommended that a collecting container is provided for the liquid removing the particles or for the draining liquid of the liquid film.
  • the liquid is preferably water or conductive water or a mixture of water and sulfuric acid.
  • wet gases means in particular gases with a moisture content of 2 to 50% by volume and preferably 3 to 40% by volume, namely at a temperature of 25 to 75 ° C. and at a pressure of 1 bar.
  • the wet gas is a water vapor saturated gas.
  • the invention relates, inter alia, to a method and an apparatus for removing particles from wet corrosive gases.
  • the particles to be removed from the gas are electrically charged by an ionization electrode via a corona discharge.
  • the charged in this way particles are then moved in the existing electric field to the pipe wall and deposited on the pipe wall.
  • the pipe wall acts as a counter electrode to the ionizing electrode. Conveniently, the pipe wall of a pipeline is grounded.
  • the gas is passed through the pipeline at a gas velocity of 0.2 to 4 m / s, preferably at a gas velocity of 1 to 3.5 m / s and more preferably at a gas velocity of 2 to 3 m / s.
  • the gas temperature is suitably 35 to 100 ° C and especially 40 to 80 ° C.
  • a corrosive gas or a corrosive wet gas is purified in the context of the method according to the invention or passed through the at least one pipeline.
  • Corrosive gas means in particular an acidic gas.
  • a sulfur dioxide-containing gas is purified and the sulfur dioxide content is preferably 5 to 50 wt .-%, in particular 10 to 30 wt .-%.
  • the gas to be cleaned according to the invention is an offgas or a sulfur dioxide-containing offgas from the field of non-ferrous metallurgy or the chemical industry.
  • the invention also provides a device for removing particles from a gas, in particular from a wet gas and preferably from a corrosive wet gas, at least one pipeline being provided for the passage of the gas, wherein at least one ionization electrode for ionizing or for electrically charging at least the particles contained in the gas extends over at least a portion of the pipeline in the longitudinal direction of the pipeline, so that the particles are moved to the pipeline wall due to the charge and the existing electric field, wherein the pipe wall is covered or wetted with a liquid film for receiving and removing the particles, wherein the maximum diameter of the pipeline is 500 mm to 2500 mm, preferably 900 mm to 1500 mm and wherein the voltage applied to the ionizing electrode is 80 kV to 350 kV, preferably 100 kV to 250 kV.
  • the features described here and below to the device according to the invention can also relate to the inventive method or can also be used in the context of the inventive method.
  • Embodiment of the invention however, a plurality of pipes are combined into a pipe bundle and the piping of this pipe bundle parallel or substantially parallel to each other.
  • the pipelines are arranged directly or immediately adjacent to each other in such a pipe bundle.
  • a pipeline may have a circular or a substantially circular cross-section.
  • a particularly preferred embodiment of the invention is characterized in that the at least one pipe or the pipes has / have a hexagonal cross-section.
  • the cross section corresponds expediently an equilateral hexagon with six equal sides. It is recommended that a plurality of pipes with hexagonal cross-section are arranged in a pipe bundle directly next to each other.
  • the hexagonal sides of the pipelines are in each case common walls of adjacent pipelines.
  • this embodiment is understood in particular by the term piping bundle.
  • pipelines with a hexagonal cross-section in the context of the feature combination according to the invention are characterized by a surprisingly functionally reliable and effective separation of particles.
  • a particularly preferred embodiment of the invention is characterized in that the pipe wall of the pipe or the pipe walls of the pipes of plastic or substantially consists of plastic / consist.
  • This embodiment is especially recommended when a wet corrosive gas is to be cleaned.
  • the entire pipe wall of a pipeline to more than 75 wt .-%, preferably more than 80 wt .-% and particularly preferably more than 85 wt .-% of plastic.
  • the plastic is in particular a polyolefin, preferably polypropylene. Also, the material selection of the polyolefin is in view of the solution of the technical problem in the context of the invention is of particular importance.
  • a particularly recommended embodiment of the invention is characterized in that the at least one pipe or the at least one pipe wall has an electrically conductive inner surface.
  • Inner surface means the surface of the pipe, which faces the ionizing electrode.
  • the pipeline wall of the pipeline or of the pipelines is a laminate of at least one outer non-electrically conductive carrier layer and at least one electrically conductive inner surface layer.
  • the carrier layer consists of non-conductive plastic or substantially non-conductive plastic and preferably the inner surface layer of electrically conductive plastic.
  • Electrically conductive plastic means in particular a modified by at least one additive plastic, through which an electrical conductivity of the plastic is achieved.
  • the plastic of the carrier layer is recommended to be a polyolefin and particularly preferably polypropylene or flame-retardant polypropylene.
  • the pipeline or the Pipe wall with the at least one carrier layer made of plastic and the at least one electrically conductive inner surface layer made of plastic by co-extruding or as a co-extrudate.
  • the thickness of the carrier layer or the total thickness of the carrier layers is 10 to 35 mm, preferably 10 to 30 mm and preferably 15 to 25 mm. It is recommended that the thickness of the inner surface layer is 1 to 10 mm, preferably 1.5 to 7 mm, and preferably 2 to 5 mm.
  • an ionization electrode is arranged centrally in the associated pipeline.
  • the central longitudinal axis of the ionization electrode coincides with the central longitudinal axis of the pipeline.
  • extends an ionizing electrode in the longitudinal direction of the associated pipe wherein preferably ionizing mandrels are arranged distributed in the longitudinal direction of the ionizing electrode and over the circumference of the ionizing electrode.
  • the ionizing spikes are arranged transversely to the longitudinal axis of the ionization electrode and are preferably arranged perpendicularly or essentially perpendicular to the longitudinal axis of the ionization electrode.
  • the tips of the ionizing mandrels point in the direction of the pipe wall. It is within the scope of the invention that a corona discharge takes place for charging at least the particles at the tips of the ionization electrode.
  • the ionization electrode or the ionization electrodes consist of lead or substantially of lead or of stainless steel or substantially of stainless steel.
  • the longitudinal axis of the pipe or the longitudinal axes of the pipes of a pipe bundle vertically or in the Essentially arranged vertically is / are.
  • the gas to be purified is introduced from below into the vertically arranged pipe or into the vertically arranged pipes and thus flows through the pipe or the pipes from bottom to top.
  • the liquid of the liquid film in particular with the particles taken up, flows vertically downward from the gas under the effect of gravity and expediently into a collecting container arranged below the pipe or below the pipes.
  • the length of the pipeline or of the pipelines is preferably 3 to 9 m, preferably 4 to 6 m and particularly preferably 4.5 to 5.4 m.
  • the inner surface of the pipeline wall acted upon by the charged and ejected particles is completely or virtually completely covered by the liquid film.
  • the liquid film is always present during operation of the device according to the invention and continuously flows off the pipe wall.
  • the liquid of the liquid film is preferably water.
  • the liquid film on the pipe wall or on the pipeline walls at least partially generated by means of this liquid from the liquid dispensing device.
  • the at least one liquid dispensing device is preferably above the Piping or piping arranged.
  • the liquid film is generated on the pipe wall or on the pipe walls on the one hand by means of the moisture of the flowing wet gas and on the other hand by means of the liquid discharged from the liquid dispensing device.
  • the liquid is preferably water or conductive water.
  • a dilute with water sulfuric acid as a liquid.
  • the introduction of the liquid with the at least one liquid dispensing device can take place continuously or discontinuously.
  • the liquid of the liquid film flows downwards, in particular under the action of gravity, and preferably into a collecting container arranged below the pipeline or below the pipelines.
  • the device according to the invention can be used as a single-stage device with only one filter stage or filter device.
  • a device according to the invention has two or more filter stages or filter devices.
  • each filter stage or filter device consists of a single pipe or a plurality of juxtaposed and parallel to each other pipelines.
  • the invention further teaches a device for removing particles from a wet gas, in particular from a wet saturated gas, wherein at least two filter stages or filter means are arranged one above the other or vertically one above the other in a single housing, each filter means at least a pipeline for passing the wet gas to be cleaned, wherein at least one ionization electrode for ionizing or for electrically charging at least the particles contained in the gas extends over at least a portion of each pipe in the longitudinal direction of the pipes, so that the particles are repelled or pressed due to the charge to the pipe wall, the pipe wall each Pipeline is covered or wetted with a liquid film for receiving and transporting the particles, wherein the maximum diameter of the pipelines 500 mm to 2500 mm, preferably 900 mm to 1500 mm and wherein a collecting device is provided, which prevents the liquid of the liquid film or the liquid films from an upper filter stage or filter device in the arranged underneath or in the vertically arranged underneath filter stage or filter device.
  • the voltage applied to the ionization electrodes of the at least two filter stages or filter devices is recommended to be 80 kV to 350 kV, preferably 100 kV to 250 kV.
  • all features or embodiments cited to the device according to the invention first described can also be realized in the two-stage or multi-stage device according to the invention described here or implemented in one or more filter stages / filter devices of this device.
  • this concerns the arrangement, the design, the diameter and the cross-sectional shape of the pipelines, the moisture content, the speed and the temperature of the gas to be purified and the design of the ionizing electrodes as well as the voltage applied to the ionizing electrodes.
  • each filter stage or filter device of the two-stage or multi-stage device has its own or a separate high-voltage supply device. It is within the scope of the invention that the high voltage of each filter stage can be set or controlled separately and thus the high voltage for the different filter stages can also be set differently.
  • a single pipeline can be used to purify the gas.
  • a plurality of pipelines is combined or combined into a pipe bundle in at least one filter stage or filter device, preferably in the at least two filter stages or filter devices.
  • the inventive two-stage or multi-stage device for the purification of gases or exhaust gases from the steel industry is used. It is within the scope of the invention that non-corrosive or less corrosive gases are cleaned with this device.
  • the pipe walls of the pipes are made of metal and preferably of steel.
  • a particularly recommended embodiment of the invention is characterized in that at least one liquid dispensing device is provided for each filter stage / filter device of the two-stage / multi-stage device, with which liquid can be introduced into the pipes or can be applied to the pipe walls.
  • at least one liquid dispensing device is arranged above the pipeline or the pipes of a filter stage.
  • the two- / multi-stage device according to the invention is operated discontinuously and after switching off the voltage applied to the ionizing electrodes, liquid is applied to the pipeline walls with the liquid dispensing device or with the liquid dispensing devices for cleaning the pipeline walls.
  • a particularly preferred embodiment of the invention is characterized in that a collecting tray for the liquid flowing out of the upper filter stage is provided between an upper filter stage or filter device and a lower filter stage or filter device arranged directly underneath or vertically below it.
  • the collecting tray thus serves to catch this downflowing liquid and prevents liquid from the upper filter stage from entering the lower or the filter stage arranged below it.
  • the gas to be cleaned through the housing or the filter stages from bottom to top recommended vertical or substantially vertically flows from bottom to top.
  • the gas to be cleaned first flows through the pipes of a lower filter stage from bottom to top, then the gas flows through the collecting tray and then the pipes of an upper filter stage from bottom to top.
  • the collecting device or the collecting tray for the liquid has a plurality of openings for the gas flowing through and to be cleaned. These openings are formed with the proviso or protected with the proviso that a penetration of the liquid from the upper filter stage is prevented by these openings.
  • the collecting tray is like a column bottom or sieve bottom of a Distillation column formed. EmpfohleneIER protruding ridges are provided from the top of the collecting tray, which limit to an elongated opening channels for the gas flowing through and form the other gutters for the collected liquid.
  • the elongated opening channels are each covered by at least one hood member, wherein the openings for the gas flowing through between the hood elements and the webs are provided and wherein the hood elements protect the opening channels against the ingress of liquid from the upper filter stage.
  • the upper side of the collecting tray means the side or surface of the collecting tray facing the upper filter stage.
  • the hood elements are formed in cross-section V-shaped. It is within the scope of the invention that the gas flows from a lower filter stage through the opening channels of the collecting tray and then through the openings between the hood elements and the webs. Empfohleneores the collected from the collecting tray liquid via the gutters a collecting container can be fed.
  • the collecting tray is arranged inclined thereto.
  • the collecting container can be a collecting container arranged below the lower filter stage or else a separate collecting container.
  • the invention is based on the finding that a surprisingly complete removal of particles from a gas can be achieved with the method according to the invention and with the device according to the invention.
  • the method and the device are thus characterized by a high degree of separation or by a high degree of efficiency.
  • Particular importance in the context of the invention with regard to the solution of the technical problem of the feature combination "wet gases - large diameter of the pipe (s) - high voltage - removal of the particles with the help
  • the device according to the invention can be produced with an advantageously low use of material and thus at relatively low cost, and the operating costs for the device according to the invention and for the method according to the invention are also relatively low Inspection and Maintenance of the Device
  • the device according to the invention is additionally characterized by an advantageously low weight.
  • High efficiency also distinguishes the two-stage or multi-stage design of a device according to the invention.
  • an effective coarse cleaning of the gas to be purified can be carried out with a lower filter stage of this device according to the invention, and then an effective fine cleaning of the gas to be cleaned can then be realized with an upper filter stage of the apparatus. It can be achieved in the lower filter stage, a degree of separation up to 99.6% and in the upper filter stage preferably a degree of separation up to 99.5%.
  • FIGS. 1 and 2 show two embodiments of a device according to the invention for the removal of particles 1 or impurity particles from a wet gas.
  • the gas is recommended for cleaning purposes and, in the exemplary embodiment, is conducted through a plurality of pipelines 2 leading to a pipeline bundle 3 (FIG. Fig. 1 ) or to two pipe bundles 3 ( Fig. 2 ) are bundled.
  • the pipes 2 and the pipe bundles 3 are oriented vertically with the longitudinal axes and the pipes 2 are preferably and in the embodiment flows through from below from the gas to be cleaned. From the Fig. 3 shows that the pipes 2 are preferred and in the exemplary embodiment have a hexagonal cross-section in the form of an equilateral hexagon.
  • the hexagonal cross-section pipelines 2 are in the pipe bundle 3 directly next to each other and in this way optimal space utilization is achieved.
  • the maximum diameter d of a pipeline 2 may be 1400 mm in the exemplary embodiment.
  • the hexagonal sides of the pipelines 2 are in each case common walls of two adjacent pipelines 2.
  • this particularly preferred embodiment is understood in particular by the term piping bundle 3.
  • each pipe 2 extends an ionization electrode 4, which is preferably and in the embodiment, each centrally located in the associated pipe 2.
  • Each ionization electrode 4 has a plurality of ionization mandrels 5, which are arranged distributed in the longitudinal direction of the ionization electrode 4 and over the circumference of the ionization electrode 4.
  • the ionizing mandrels 5 are arranged perpendicular to the longitudinal axis of the associated iontechnischselektrode 4 and the tips of the ionizing mandrels 5 point in the direction of the pipe wall 6 of the associated pipe 2.
  • Die Fig. 3 shows a preferred embodiment of an ionization electrode used in the invention 4.
  • the ionization electrode 4 has a central electrode rod 12 and this electrode rod 12 is connected via connecting elements 13 with electrode rings 14.
  • the electrode rings 14 are arranged distributed over the longitudinal direction of the electrode rod 12.
  • Ionticiansdorne 5 are connected.
  • the ionization electrode 4 may consist in particular of stainless steel or lead.
  • a voltage of 240 kV At each ionization electrode 4 may be applied in the embodiment, a voltage of 240 kV.
  • the particles 1 to be removed from the gas are electrically charged by means of the ionizing electrodes 4. That is in the Fig. 4 shown schematically.
  • each pipe wall 6 On the inner surface of each pipe wall 6, a continuous liquid film 7 is present, which preferably and in the embodiment consists of water.
  • the pipe wall 6 is expediently and grounded in the embodiment and acts as a counter-electrode to the associated opposing ionizing electrode 4.
  • the pressed to the pipe wall 6 or moving particles 1 are taken up by the liquid film 7 and the liquid of the liquid film 7 flows under the action of gravity in vertical Direction down and transported the recorded particles 1 thus in this direction.
  • the particles 1 can either be dissolved in the liquid of the liquid film 7 or be transported away in the form of a suspension.
  • Pipe bundles 3 are shown collecting container 8 for the laden with the particles and vertically downflowing liquid of the liquid film. 7
  • each pipeline 2 has a liquid dispensing device in the form of dispensing nozzles 9. With these dispensing nozzles 9 liquid or water is applied to the pipe walls 6 and thereby the formation of continuous liquid films 7 is supported on the pipe walls 6.
  • a pipe wall 6 of the pipes 2 made of plastic or substantially of plastic is suitable especially when wet corrosive gases are to be cleaned.
  • Empfohlene justify the pipe walls 6 made of polypropylene or substantially of polypropylene.
  • the pipe walls 6 have an electrically conductive inner surface.
  • a pipe wall 6 is preferred and in the exemplary embodiment has an outer carrier layer 10 of non-conductive plastic and an inner surface layer 11 of electrically conductive plastic. Both the carrier layer 10 and the inner surface layer 11 consist in the exemplary embodiment of polypropylene.
  • the pipe walls 6 and the pipes 2 are produced by coextrusion.
  • the thickness of the carrier layer 10 may be 20 mm in the embodiment, and the thickness of the electrically conductive inner surface layer 11 may be 3 mm.
  • the pipe walls can also consist of a metal, in particular steel.
  • the device according to the invention is a single-stage device or a device with only one filter stage.
  • This filter stage has a single pipe bundle 3 of a plurality of pipes 2.
  • the pipe bundle 3 or the one filter stage is flowed through by the gas to be cleaned from bottom to top.
  • a wet corrosive gas can be cleaned with this single-stage device.
  • a device according to the invention is a two-stage device or to a device with two filter stages or filter devices 15, 16.
  • the two filter devices 15, 16 are vertically stacked in a single housing 17 arranged.
  • the gas flows through the housing 17 and the filter means 15, 16 from bottom to top. This means that the gas to be purified first flows through the lower filter device 15 and then flows through the upper filter device 16.
  • Each filter device 15, 16 preferably and in the exemplary embodiment, a plurality of pipes 2, which are bundled into a pipe bundle 3. The pipes 2 are thus flowed through from below by the gas to be cleaned.
  • each filter device 15, 16 has its own or a separate high-voltage supply device 18.
  • the high voltage for each filter device 15, 16 can be set or controlled separately.
  • Below the lower filter device 15 is preferably a non-illustrated collecting container for the charged with the particles 1 and vertically down from the lower filter device 15 draining liquid.
  • the two-stage device has a collecting device, which prevents liquid from the liquid films 7 of the upper filter device 16 from entering the filter device 15 arranged vertically underneath.
  • this collecting device is designed as a collecting tray 19 and this collecting tray 19 is disposed between the upper filter means 16 and the lower filter means 15 arranged vertically below. With this collecting tray 19, the effluent from the upper filter means 16 is collected and thus prevents this liquid from entering the lower filter means 15.
  • a plurality of openings 21 is provided for the gas to be cleaned.
  • these openings 21 are formed with the proviso or protected with the proviso that liquid from the liquid films 7 of the upper filter means 16 can not pass through the openings 21 in the lower filter means 15.
  • said webs 23 limit the one provided in the collecting tray 19 opening channels 24 for the gas flowing through and form the other gutters 25 for the collected liquid.
  • the opening channels 24 and drainage channels 25 expediently extend over the entire collecting tray 19.
  • the opening channels 24 are preferably covered in the exemplary embodiment by hood elements 26 which are V-shaped in cross-section, the openings 21 for the gas to be cleaned or for the gas flowing through between the hood elements 26 and the webs 23 are provided.
  • the gas thus flows through opening channels 24 upwards and then through the openings 21 and then in the direction of the upper filter device 16.
  • the hood elements 26 thereby protect the opening channels 24 from the ingress of the upper filter device 16th originating liquid.
  • the pairs of webs 24 limiting web pairs are formed alternately with different height.
  • the pair of webs can be arranged at a small distance from each other and nonetheless, the liquid can pass through the hood elements 26 in the gutters 25 of the collecting tray 19.
  • the collecting tray 19 is preferably inclined, so that the liquid originating from the upper filter device 16 can flow off via the drainage channels 25. Appropriately, the liquid is then passed into a collecting vessel, not shown.
  • the two-stage device according to Fig. 2 is particularly suitable for the purification of gases or exhaust gases from steelmaking. It is also within the scope of the invention that non-corrosive gases can be cleaned with this device.
  • the two-stage device according to Fig. 2 is particularly suitable for discontinuous operation. In this case, after switching off the voltage applied to the ionizing electrodes, the "resting phases" can be used to clean off the pipeline walls 6 by means of the liquid discharged from the dispensing nozzles 9. Subsequently, the voltage for the ionizing electrodes 4 can be switched on again and there is a further deposition process.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
EP11170145A 2011-06-16 2011-06-16 Procédé et dispositif de suppression de particules à partir d'un gaz Withdrawn EP2535115A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11170145A EP2535115A1 (fr) 2011-06-16 2011-06-16 Procédé et dispositif de suppression de particules à partir d'un gaz
PCT/EP2012/061517 WO2012172086A1 (fr) 2011-06-16 2012-06-15 Procédé et dispositif d'élimination de particules d'un gaz

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Application Number Priority Date Filing Date Title
EP11170145A EP2535115A1 (fr) 2011-06-16 2011-06-16 Procédé et dispositif de suppression de particules à partir d'un gaz

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EP2535115A1 true EP2535115A1 (fr) 2012-12-19

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103521352A (zh) * 2013-09-24 2014-01-22 何宗彦 一种高压静电场净化装置
WO2015170293A1 (fr) * 2014-05-09 2015-11-12 Saipem S.P.A. Systeme et procede pour l'epuration d'un flux de gaz provenant d'une unite de solidification d'installation de production d'uree
DE102014225203A1 (de) * 2014-12-09 2016-06-09 Sms Elex Ag Elektrofilter zum Reinigen von Gas
WO2017174773A1 (fr) * 2016-04-08 2017-10-12 Arcelik Anonim Sirketi Hotte d'aspiration comprenant un guide d'ions
WO2020245508A1 (fr) * 2019-06-07 2020-12-10 Aavi Technologies Ltd Module purificateur d'air, système de purification d'air, unité de traitement d'air, utilisation d'un module purificateur d'air et procédé de purification d'air
CN114173931A (zh) * 2020-03-02 2022-03-11 富士电机株式会社 集尘装置

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103521352A (zh) * 2013-09-24 2014-01-22 何宗彦 一种高压静电场净化装置
CN103521352B (zh) * 2013-09-24 2016-02-10 何宗彦 一种高压静电场净化装置
WO2015170293A1 (fr) * 2014-05-09 2015-11-12 Saipem S.P.A. Systeme et procede pour l'epuration d'un flux de gaz provenant d'une unite de solidification d'installation de production d'uree
DE102014225203A1 (de) * 2014-12-09 2016-06-09 Sms Elex Ag Elektrofilter zum Reinigen von Gas
WO2017174773A1 (fr) * 2016-04-08 2017-10-12 Arcelik Anonim Sirketi Hotte d'aspiration comprenant un guide d'ions
WO2020245508A1 (fr) * 2019-06-07 2020-12-10 Aavi Technologies Ltd Module purificateur d'air, système de purification d'air, unité de traitement d'air, utilisation d'un module purificateur d'air et procédé de purification d'air
CN114173931A (zh) * 2020-03-02 2022-03-11 富士电机株式会社 集尘装置
EP3991849A4 (fr) * 2020-03-02 2022-10-19 Fuji Electric Co., Ltd. Collecteur de poussière

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