EP2763795A1 - Moyen de piégeage de particules permettant d'éliminer des particules d'un flux pollué - Google Patents

Moyen de piégeage de particules permettant d'éliminer des particules d'un flux pollué

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Publication number
EP2763795A1
EP2763795A1 EP12780303.9A EP12780303A EP2763795A1 EP 2763795 A1 EP2763795 A1 EP 2763795A1 EP 12780303 A EP12780303 A EP 12780303A EP 2763795 A1 EP2763795 A1 EP 2763795A1
Authority
EP
European Patent Office
Prior art keywords
wire
emitter electrode
particle
wire emitter
guide surface
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
Application number
EP12780303.9A
Other languages
German (de)
English (en)
Other versions
EP2763795B8 (fr
EP2763795B1 (fr
Inventor
Roland Willibrordus VAN NIEKERK
Jacobus Johannes Cornelis VERMEULEN
Johannes Cornelis Maria Marijnissen
Rein Andre Roos
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.)
Staticair BV
Original Assignee
Koninklijke BAM Groep NV
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
Priority claimed from NL2007548A external-priority patent/NL2007548C2/en
Application filed by Koninklijke BAM Groep NV filed Critical Koninklijke BAM Groep NV
Priority to PL12780303T priority Critical patent/PL2763795T3/pl
Publication of EP2763795A1 publication Critical patent/EP2763795A1/fr
Application granted granted Critical
Publication of EP2763795B1 publication Critical patent/EP2763795B1/fr
Publication of EP2763795B8 publication Critical patent/EP2763795B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • 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
    • B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • B03C3/366—Controlling flow of gases or vapour by static mechanical means, e.g. deflector located in the filter, e.g. special shape of the 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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/86—Electrode-carrying means
    • 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
    • B03C2201/04—Ionising electrode being a wire
    • 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
    • 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
    • B03C2201/14—Details of magnetic or electrostatic separation the gas being moved electro-kinetically
    • 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
    • B03C2201/24—Details of magnetic or electrostatic separation for measuring or calculating parameters, efficiency, etc.

Definitions

  • the invention relates to the field of catching particles from an particle flow by means of electrostatic fields and ionic winds and/or Corona winds. More in particular, the field relates to removing smut, fine dust and exhaust gas particles from polluted air in tunnels, factory buildings, stables and polluted areas in buildings in general.
  • Particle catch arrangement are used to remove particles from polluted air. Particles, such as smut, fine dust and exhaust gas particles pollute the air and are extremely unhealthy for human beings. Particle catch arrangements using electrostatic fields combined with corona chargers are used to catch particles and remove them from polluted air.
  • the corona charger locally ionizes the air resulting in ionized particles. Often these corona chargers have a sharp electrode. The ionized particles are attracted by a differently charged more distant lying surface or electrode. The attraction results from an exertion of an electrostatic force resulting from an electrostatic field between the corona charger and the more distant lying surface or electrode.
  • the moving ionized particles collide with neutral (uncharged) molecules en route to the surface or electrode and create a pumping action resulting in air movement.
  • the resulting air movement is generally known as ion wind, also sometimes referred to as ionic wind and corona wind even though these concepts are not entirely synonymous.
  • WO2007/100254 shows a particle catch arrangement comprising positively charged antenna like objects that locally ionize air and negatively charged collector plates that attract ionized particles and collects them.
  • the positively charged antenna and the negatively charged plates generate an electrostatic field above a road, such that smut, fine dust and exhaust gas particles are removed from an area above the road where the electrostatic field is generated.
  • a relative large electrostatic field must be generated to filter the polluted air.
  • the required relative large electrostatic field results in relative large energy required and/or relative large collector plates. This results in a negative impact on environmental issues such as visual pollution and/or energy usage.
  • This object is received by a particle catch arrangement for catching particles from an particle flow according to claim 1.
  • This particle catch arrangement comprises a first end and a second end.
  • the support structure is made from metal.
  • the particle catch arrangement comprises a charged fist wire emitter electrode having a first wire longitudinal axis for locally ionizing particles.
  • the first wire emitter electrode is a relatively sharp object resulting in a corona charge of polluted air, such that ionized particles are generated.
  • the first wire emitter electrode is held in tension by the support structure between the first end and the second end via isolators electrically isolating the first wire emitter electrode from the support structure.
  • the first wire emitter electrode is elongated.
  • the isolators isolate the first wire emitter electrode from the support structure such that the first wire emitter electrode may have a different electrostatic charge with respect to the support structure.
  • the particle catch arrangement comprises a guide surface for guiding at least a part of the particle flow substantially in a plane perpendicular to the first wire longitudinal axis.
  • the guide surface is spaced away parallel from the first wire emitter electrode in a first direction perpendicular with respect to the first wire longitudinal axis.
  • the first direction is defined along a smallest distance between the first wire emitter electrode and the guide surface.
  • the guide surface has a different electrostatic charge with respect to the first wire emitter electrode for providing a first electrostatic force on the ionized particles from the first wire emitter electrode towards the guide surface.
  • the first electrostatic force results from a first electrostatic field provided from the first wire emitter electrode towards the guide surface in a direction substantially equal to the first direction. Therefore, the first electrostatic force is substantially in a direction equal to the first direction. In particular, this results in the particle flow following a trajectory towards the guide surface.
  • the first wire emitter electrode is charged with a positive electrostatic charge and the guide surface is charged with a negative electrostatic charge or neutral electrostatic charge, for example when the guide surface is earthed.
  • a positive electrostatic charge results in positive ionized particles.
  • the support structure furthermore comprises a first longitudinal bar spaced away parallel from the first wire emitter electrode in a second direction perpendicular with respect to the first wire longitudinal axis.
  • the longitudinal bar is elongated over a length at least equal to the first wire emitter electrode.
  • the second direction has a component that is opposite to the first direction, meaning aligned with the first direction but in opposite direction.
  • the second direction also has a component that is perpendicular with respect to the first direction. This implies that the first wire emitter electrode is provided substantially between the guide surface and the first longitudinal bar.
  • the first longitudinal bar is spaced away from the first wire emitter electrode as well as from the guide surface.
  • the first longitudinal bar has a different electrostatic charge with respect to the first wire emitter electrode for providing a second electrostatic force on the ionized particles.
  • the second electrostatic force is exerted from the first wire emitter electrode towards the first longitudinal bar.
  • the electrostatic force results from a second electrostatic field from the first wire emitter electrode towards the longitudinal bar in a direction substantially equal to the second direction. Therefore, the second electrostatic force is substantially in a direction equal to the second direction.
  • the first longitudinal bar defines the second electrostatic field, and thus the second electrostatic force such that the first longitudinal bar is suitable for boosting the particle flow such that the particle flow at least partly follows a looped trajectory around the first wire emitter electrode and the first longitudinal bar seen in the plane perpendicular to the first wire longitudinal axis. Without the first longitudinal bar the particle flow only comprises a trajectory towards the guide surface. Having the second direction opposite to the first direction and comprised of a component perpendicular to the first direction allows a particle to be deflected by the guide surface and boosted by the second electrostatic force and/or field.
  • the boosting of the particle flow is directly when the ionized particles flow in the second electrostatic field and/or is indirect when ionized particles are captured as a result of scavenging by a particle flow from the first wire emitter electrode towards the first longitudinal bar.
  • the first- and second electrostatic forces, together with a scavenging effect results in the particle flow following the looped trajectory.
  • the second electrostatic force results in an boosting by scavenging of an ionized particle.
  • the ionized particle does not follow a linear trajectory hitting the guide surface, but is boosted both by the guiding surface and directly and/or indirectly by the second electrostatic force.
  • the second electrostatic force is in the second direction towards the first longitudinal bar and away from the first wire emitter electrode as well as away from the guide surface.
  • An ionized particle shall therefore be boosted from the guiding surface towards the first longitudinal bar and shall follow a looped trajectory around the first wire emitter electrode as well as well as the first longitudinal bar. Because of the ionized particles following a looped trajectory the chance of the ionized particle to collide with an air molecule is increased.
  • the particle catch arrangement comprises an outer shell surface for guiding at least a part of the particle flow substantially in the plane perpendicular to the first wire longitudinal axis, wherein the outer shell surface at least partly encloses the first wire emitter electrode and the guide surface, wherein the outer shell surface comprises the first longitudinal bar.
  • the outer shell surface preferably is cylindrically shaped and is circular seen in the plane perpendicular to the first wire longitudinal axis.
  • An external disturbance such as a high intensity wind may destabilize the particle flow around the first wire emitter. Having a curved shaped outer shell surface guides the high intensity wind smoothly around the first wire emitter such that a stable particle flow following a looped trajectory may be established.
  • the outer shell surface at least partly is open for the particle flow to enter and leave the outer shell surface. This allows a particle flow that partly is inside the outer shell surface and partly is outside the outer shell surface. A scavenging effect wherein one part of a particle flow enters the outer shell surface and another part of the particle flow leaves the outer shell contributes to a stability of the particle flow.
  • the particle catch arrangement comprises multiple guide surfaces wherein the multiple guide surfaces are arranged in an angular configuration with respect to each other seen in the plane perpendicular to the first wire longitudinal axis.
  • the multiple guide surfaces are formed by three plate-like guide surfaces.
  • the three guide surfaces are arranged such that the angular configuration is triangular.
  • the multiple guide surfaces form a triangle seen in the plane perpendicular to the first wire longitudinal axis.
  • the particle catch arrangement comprises multiple first wire emitter electrodes comprised in an interior space defined by the outer shell surface.
  • the first wire emitter electrodes are spaced away parallel from at least one of the guide surfaces and from at least one of the longitudinal bars for boosting multiple particle flows such that each of the multiple particle flows at least partly follow a looped trajectory around one of the multiple first wire emitter electrodes and one of the first longitudinal bar substantially in the plane perpendicular to the first wire longitudinal axis.
  • one of the multiple first wire emitter electrodes cooperates at least with one of the multiple guide surfaces.
  • Each of the multiple first wire emitter electrode corresponds with at least one of the multiple guide surfaces.
  • the first longitudinal bar and the first wire emitter electrode are arranged substantially vertical with respect to a ground surface.
  • the particle catch arrangement provides a first gap between the first wire emitter electrode and the guide surface. Moreover, a second gap is provided between the guide surface and the first longitudinal bar. The gaps are suitable for allowing a particle flow to follow a looped trajectory around the first wire emitter electrode and the first longitudinal bar in the plane perpendicular to the first wire longitudinal axis.
  • the particle catch arrangement further comprises a second wire emitter electrode having a second wire longitudinal axis for locally ionizing particles.
  • the second wire emitter electrode is also held in tension by the support structure between the first end and the second end via isolators electrically isolating the second wire emitter electrode from the support structure.
  • the isolators allows that the electrostatic charge of the second wire emitter electrode is differently chargeable compared to the support structure, but also compared to the first wire emitter electrode.
  • the second wire emitter electrode is being spaced apart parallel from the first wire emitter electrode. Thereby, they define a wire gap between the first- and second wire electrode emitter which results in the particle flow following a trajectory through the wire gap towards the guide surface.
  • the guide surface is spaced away parallel from the second wire emitter electrode in a third direction perpendicular with respect to the second wire longitudinal axis.
  • the third direction is defined along a smallest distance between the second wire emitter electrode and the guide surface.
  • the second wire longitudinal axis is parallel to the first wire longitudinal axis and parallel to the guide surface.
  • the guide surface has a different electrostatic charge compared to the second wire emitter electrode for providing a third electrostatic force on the ionized particles from the second wire emitter electrode towards the guide surface.
  • the third electrostatic force results from a third electrostatic field provided from the second wire emitter electrode towards the guide surface in a direction substantially equal to the third direction. Therefore, the third electrostatic force is substantially in a direction equal to the third direction. In particular, this results in the particle flow at least partly following a trajectory from between the second wire emitter electrode and the first wire emitter electrode towards the guide surface.
  • the support structure comprises a second longitudinal bar spaced away parallel from the second wire emitter electrode in a fourth direction perpendicular with respect to the longitudinal axis.
  • the fourth direction is along a smallest distance between the second longitudinal bar and the second wire emitter electrode.
  • the fourth direction has a component that is opposite to the third direction, meaning aligned with the third direction but in opposite direction.
  • the fourth direction also has a component that is perpendicular with respect to the third direction. This implies that the second wire emitter electrode is provided substantially between the guide surface and the second longitudinal bar. In other words, the second longitudinal bar is spaced away from the second wire emitter electrode as well as away from the guide surface.
  • the second longitudinal bar has a different electrostatic charge with respect to the second wire emitter electrode for providing a fourth electrostatic force on the ionized particles from the second wire emitter electrode towards the second longitudinal bar.
  • the fourth electrostatic force results from a fourth electrostatic field from the second wire emitter electrode towards the second longitudinal bar in a direction substantially equal to the fourth direction. Therefore, the fourth electrostatic force is substantially in a direction equal to the fourth direction.
  • the second longitudinal bar defines the fourth electrostatic field, and thus the fourth electrostatic force is such that the second longitudinal bar is suitable for boosting the particle flow such that the particle flow at least partly follows a looped trajectory around the second wire emitter electrode and the second longitudinal bar substantially seen in the plane perpendicular to the second wire longitudinal axis.
  • two looped trajectories Seen in the plane perpendicular to the wire longitudinal axes, two looped trajectories, being a first- and second looped trajectory, additionally boost each other.
  • the first looped trajectory has a loop direction that is in an opposite loop direction compared to the second looped trajectory.
  • Having two parallel spaced wire emitter electrodes results in the two looped trajectories of a particle flow.
  • the particle flow of each looped trajectory is stronger than a separate looped trajectory generated by an individual wire emitter electrode. It is therefore particularly advantageous to have the second wire emitter electrode and the second longitudinal bar spaced away parallel from the guiding surface, the first wire emitter electrode and the first longitudinal bar.
  • the particle catch arrangement provides a third gap between the second wire emitter electrode and the guide surface and a fourth gap between the guide surface and the second longitudinal bar.
  • the third and the fourth gap are suitable for allowing a particle flow to follow a (second) looped trajectory around the second wire emitter electrode and the second longitudinal bar in a plane perpendicular to the second wire longitudinal axis.
  • the component of second direction perpendicular to the first direction is opposite to the component of the fourth direction perpendicular to the third direction.
  • the second electrostatic force and the fourth electrostatic force comprise opposing components, resulting in a further boosting to form the two separate looped trajectories of the particle flow.
  • a smallest distance between the first wire emitter electrode and the guide surface and a smallest distance between the second wire emitter electrode and the guide surface is substantially equal.
  • the particle catch arrangement comprises a first collector provided to the support structure.
  • the first collector is arranged near the guide surface for receiving particles from the particle flow.
  • the fist collector is arranged in a trajectory of the particle flow, preferably at an end thereof.
  • the first collector is provided to the guide surface.
  • the first collector is charged with a charge that is different compared to the first wire emitter electrode and has a voltage larger than the guide surface.
  • the first collector comprises a charged substrate for capturing particles from the particle flow by means of electrostatic forces.
  • the first collector comprises protruding fibres for capturing particles from the particle flow by means of molecular forces.
  • a thickness of the fibres correspond with capturing of a certain size of a to be captured particle.
  • the thickness of the fibres are designed to capture a certain desired size of a to be captured particle.
  • the substrate is provided between the guide surface and the protruding fibres.
  • the first wire emitter electrode comprises longitudinally spaced sharp discharge means for locally ionizing particles, wherein at least one discharge means is provided in a plane perpendicular to the first wire longitudinal axis comprising the particle flow following the looped trajectory.
  • the sharp discharge means allows for focussing an amount of generating ionizing particles at a desired location along the first wire longitudinal axis.
  • the sharp discharge means is arranged in a plane perpendicular to the first wire longitudinal axis, the number of ionized particles increases seen in the plane perpendicular to the first wire longitudinal axis. This results in a more efficient looped trajectory of the particle flow.
  • the first wire emitter electrode is positively charged by applying a positive voltage.
  • the first longitudinal bar is charged with a voltage lower than the voltage of the first wire emitter electrode.
  • the guide surface is charged with a voltage lower than the voltage of the first longitudinal bar.
  • the first longitudinal bar is charged with a negative voltage and the guide surface is neutrally charged or earthed.
  • a smallest distance between the guide surface and the first wire emitter electrode is larger or equal to a smallest distance between the first longitudinal bar and the first wire emitter electrode.
  • the smallest distance between the guide surface and the first wire emitter electrode is 30 cm
  • the smallest distance between the first longitudinal bar and the first wire emitter electrode is 30 cm
  • the length of the first wire emitter electrode is 6 m.
  • This is advantageous, as it allows for a compact particle catch arrangement, suitable for removing polluted particles from buildings and/or traffic roads, in which the second electrostatic force is sufficient large to allow a charged particle to follow a looped trajectory around the first wire emitter electrode and the first longitudinal bar.
  • the particle catch arrangement further comprises at least one voltage generator being configured to receive a voltage setting signal and configured to provide a voltage to the first wire emitter electrode and/or the first longitudinal bar representative for the voltage setting signal.
  • the particle catch arrangement also comprises a control unit configured to provide the voltage setting signal depending on the electrostatic charge of the guide surface, the electrostatic charge of the first wire emitter electrode, a smallest distance between the first wire emitter electrode and the guide surface, and a smallest distance between the first wire emitter electrode and the first longitudinal bar.
  • the control unit provides the voltage setting signal representative for a compensation. This also allows for a detailed tuning of the electrostatic fields such that an optimal, that is a relatively strong looped trajectory of the particle flow is generated.
  • control unit is configured to provide a voltage setting signal that is representative to the second electrostatic force being larger than the first electrostatic force.
  • the second electrostatic force By controlling the electrostatic charge of the first wire emitter electrode and the first longitudinal bar the second electrostatic force is provided with a desired strength.
  • the second electrostatic force acts on ionized particles and results from the second electrostatic field generated from the first wire emitter electrode towards the first longitudinal bar.
  • a charged particle can be boosted towards the first longitudinal bar and afterwards around the first wire emitter electrode and the first longitudinal bar seen in a plane perpendicular to the first wire longitudinal axis.
  • the boosting is directly provided by having the ionized particle in the second electrostatic field and/or indirectly as a result of scavenging.
  • the particle catch arrangement further comprises at least one voltage sensor for providing a voltage measurement signal representative for a voltage in the first longitudinal bar, and/or a voltage in the first wire emitter electrode, and/or a voltage in the guide surface, wherein the control unit is configured to receive the voltage measurement signal.
  • control unit is able to set the desired voltages to the first wire emitter electrode, and/or guide surface, and/or longitudinal bar based on an actual value of their respective voltages. This increases robustness and integrity of the particle catch arrangement.
  • the particle catch arrangement further comprises at least one current sensor for providing a current measurement signal representative for a current in the first longitudinal bar, and/or a current in the first wire emitter electrode, and/or a current in the guide surface, wherein the control unit is configured to receive current voltage measurement signal.
  • the first wire emitter electrode degraded with time and release and/or disperses small metal particles resulting in the first wire emitter electrode getting thinner. This is directly seen in an increase of the current in the receiving guide surface and/or first longitudinal bar.
  • an deflector surface is arranged spaced away from the guide surface towards the first wire emitter electrode defining a deflector gap between the guide surface and the deflector surface seen in the plane perpendicular to the first wire longitudinal axis for deflecting the particle in the plane perpendicular to the first wire longitudinal axis.
  • the surface comprises a protruding deflector having a protruding deflector surface for mechanically boosting the particle flow such that it follows the looped trajectory.
  • the protruding deflector protrudes in a direction towards the first wire emitter electrode. This is advantageous as it allows for a stable looped trajectory due to the
  • the protruding deflector is curved such that it follows a shape of a desired shape of the looped trajectory.
  • the protruding deflector surface is covered with a substantially reflective material that reflects ultraviolet radiation received from the first wire emitter electrode.
  • the ultraviolet radiation is released as a by-product from the first wire emitter during corona discharging (ionizing air molecules). In particular, it decomposes hydrocarbon particles, more in particular aromatic hydrocarbon particles.
  • a shape of the protruding deflector is such that the reflected ultraviolet radiation is directed towards the looped trajectory.
  • the protruding deflector surface is covered with a catalyst material.
  • the catalyst material is activated by ultraviolet radiation that is preferably received from the first wire emitter electrode.
  • the catalyst material is a titan oxide material.
  • the catalyst material When activated by ultraviolet radiation the catalyst material results in converting a gas, such as nitrogen oxide into an aerosol.
  • the aerosol is a particle that eventually can be moved away by the particle flow and collected by a collector.
  • the particle catch arrangement further comprises a liquid generator for providing a liquid to the particle flow and a liquid drain for collecting the liquid from the particle flow.
  • the liquid such as water and/or dew is collected by the liquid drain.
  • the liquid generator is provided such that is above the particle flow and the liquid drain is provided such that it is below the particle flow. Gravity simply lets the liquid go through the particle flow from the liquid generator into the liquid drain.
  • a particle catch assembly comprises at least one particle catch arrangement according to the invention.
  • a first particle catch arrangement is arranged parallel to a second particle catch arrangement such that respective wire emitter electrodes are at least partly substantially parallel.
  • the respective guide surface of the particle catch arrangements are integral.
  • the respective wire emitter electrodes are charged by a single voltage generator and/or power supply. This simplifies the particle catch assembly.
  • the invention also relates to a particle catch device according to claim 28.
  • Particle catch devices are known in the prior art, for example they are arranged beside open roads wherein they define an electrostatic field over the road. The electrostatic field attracts ionized particles towards a first collector surface. Ionized particle collide with polluted air molecules and/or particles.
  • Such a particle device is known from WO2007/100254 which shows a particle catch arrangement comprising positively charged antenna like objects that locally ionize air and negatively charged collector plates that attract ionized particles and collects them.
  • the positively charged antenna and the negatively charged plates generate the electrostatic field above the road, such that smut, fine dust and exhaust gas particles are removed from an area above the road where the electrostatic field is generated.
  • a relative large electrostatic field must be generated to filter the polluted air.
  • the required relative large electrostatic field results in relative large energy required and/or relative large collector plates. This results in a negative impact on environmental issues such as visual pollution and/or energy usage.
  • the object is achieved by a particle catch device according to claim 28.
  • the particle catch device is suitable for removing particles from a polluted particle flow.
  • the particle catch device in particular comprises a fist longitudinal bar according to the invention. It further comprises a first wire emitter electrode for locally ionizing particles having a first wire longitudinal axis.
  • the first wire emitter electrode has a first wire longitudinally axis.
  • the particle catch device also comprises a guide surface spaced apart parallel from the first wire longitudinal axis for guiding a particle flow in a plane perpendicular with respect to the first wire longitudinal axis, in which the guide surface is charged with a different electrostatic charge compared to the first wire emitter electrode for generating an electrostatic force on the ionized particles in a direction from the first wire emitter electrode towards the guide surface.
  • the guide surface is arranged with a boost deflector having a starting point and an ending point seen in a plane perpendicular to the first wire longitudinal axis.
  • the boost deflector is suitable for mechanically boosting the particle flow in the plane perpendicular to the first wire longitudinal axis and is suitable for boosting the particle flow such that the particle follows at least partly a looped trajectory around the first wire emitter electrode.
  • the boosting is particularly generated mechanically by the guide surface having a boost deflector.
  • the boost deflector can for example be a recess in the guide surface, but alternatively a protrusion.
  • the boosting is additionally generated electrically by the first longitudinal bar according to the invention.
  • the boost deflector has a shape that is substantially equal to a shape of the looped trajectory.
  • the first wire emitter electrode is arranged substantially centred with respect to the starting point and the ending point.
  • the invention also relates to a particle catch device according to claim 31.
  • Particle catch devices are known in the prior art, for example they are arranged beside open roads wherein they define an electrostatic field over the road.
  • the electrostatic field attracts ionized particles towards a first collector surface.
  • Ionized particle collide with polluted air molecules and/or particles.
  • Such a particle device is known from WO2007/100254 which shows a particle catch arrangement comprising positively charged antenna like objects that locally ionize air and negatively charged collector plates that attract ionized particles and collects them.
  • the positively charged antenna and the negatively charged plates generate the electrostatic field above the road, such that smut, fine dust and exhaust gas particles are removed from an area above the road where the electrostatic field is generated.
  • a relative large electrostatic field must be generated to filter the polluted air.
  • the required relative large electrostatic field results in relative large energy required and/or relative large collector plates. This results in a negative impact on environmental issues such as visual pollution and/or energy usage.
  • the object is achieved by a particle catch device according to claim 31.
  • the particle catch device is suitable for removing particles from a polluted particle flow.
  • the particle catch device in particular comprises a fist longitudinal bar according to the invention. It further comprises a first wire emitter electrode for locally ionizing particles having a first wire longitudinal axis.
  • the first wire emitter electrode has a first wire
  • the particle catch device also comprises a guide surface spaced apart parallel from the first wire longitudinal axis for guiding a particle flow in a plane perpendicular with respect to the first wire longitudinal axis, in which the guide surface is charged with a different electrostatic charge compared to the first wire emitter electrode for generating an electrostatic force on the ionized particles in a direction from the first wire emitter electrode towards the guide surface.
  • the particle catch device comprises an outer shell surface for guiding at least a part of the particle flow substantially in the plane perpendicular to the first wire longitudinal axis, wherein the outer shell surface at least partly encloses the first wire emitter electrode and the guide surface.
  • the first wire emitter electrode and the guide surface are therefore within an interior surface defined by the outer shell surface.
  • the outer shell surface has as advantage that the outer shell surface on the one hand shields the particle flow from unwanted external disturbances, such as a high intensity or turbulent wind, and on the other hand guides and boosts the particle flow to follow the looped circular trajectory around the first wire emitter electrode and the first longitudinal bar.
  • the outer shell surface results in a higher capacity compared as the particle flow is more stable and can more easily catch polluted particles.
  • the outer shell surface preferably is cylindrically shaped and is circular seen in the plane perpendicular to the first wire longitudinal axis.
  • An external disturbance such as a high intensity wind may destabilize the particle flow around the first wire emitter. Having a curved shaped outer shell surface guides the high intensity wind smoothly around the first wire emitter such that a stable particle flow following a looped trajectory may be established.
  • the outer shell surface at least partly is open for the particle flow to enter and leave the outer shell surface. This allows a particle flow that partly is inside the outer shell surface and partly is outside the outer shell surface.
  • a scavenging effect wherein one part of a particle flow enters the outer shell surface and another part of the particle flow leaves the outer shell contributes to a stability of the particle flow.
  • the guide surface is arranged with a boost deflector having a starting point and an ending point seen in a plane perpendicular to the first wire longitudinal axis.
  • the boost deflector is suitable for mechanically boosting the particle flow in the plane perpendicular to the first wire longitudinal axis and is suitable for boosting the particle flow such that the particle follows at least partly a looped trajectory around the first wire emitter electrode.
  • the ionized particles only collide with particles that are sufficiently large.
  • the larger the polluted particle the larger the chance that a moving ionized particle collides with polluted particle.
  • the boosting is particularly generated mechanically by the guide surface having a boost deflector.
  • the boost deflector can for example be a recess in the guide surface, but alternatively a protrusion.
  • the boosting is additionally generated electrically by the first longitudinal bar according to the invention.
  • the boost deflector has a shape that is substantially equal to a shape of the looped trajectory.
  • the first wire emitter electrode is arranged substantially centred with respect to the starting point and the ending point.
  • the particle catch device comprises multiple guide surfaces wherein the multiple guide surfaces are arranged in an angular configuration with respect to each other seen in the plane
  • the multiple guide surfaces are formed by three plate-like guide surfaces.
  • the three guide surfaces are arranged such that the angular configuration is triangular.
  • the multiple guide surfaces form a triangle seen in the plane perpendicular to the first wire longitudinal axis.
  • the particle catch device comprises multiple first wire emitter electrodes comprised in an interior space defined by the outer shell surface.
  • the first wire emitter electrodes are spaced away parallel from at least one of the guide surfaces for boosting multiple particle flows such that each of the multiple particle flows at least partly follow a looped trajectory around one of the multiple first wire emitter electrodes in the plane perpendicular to the first wire longitudinal axis.
  • one of the multiple first wire emitter electrodes cooperates at least with one of the multiple guide surfaces.
  • Each of the multiple first wire emitter electrode corresponds with at least one of the multiple guide surfaces. This further increases the capacity of the particle catch arrangement while remaining compact.
  • the first wire emitter electrode is arranged substantially vertical with respect to a ground surface.
  • the invention also relates to a method for removing particles from polluted air according to claim 37.
  • the method comprises the step of locally ionizing air by means of charging at least one wire emitter electrode having a longitudinal axis.
  • the method comprises the step of generating a particle flow by supplying a differently charged guide surface spaced away parallel from the at least one wire emitter electrode in a first direction perpendicular to the longitudinal axis for providing a first electrostatic force on ionized particles from the first wire emitter electrode towards the guide surface resulting in the particle flow following a trajectory from the first emitter electrode towards the guide surface.
  • the method further comprises the step of mechanically guiding the particle flow in a guiding direction substantially lying in a plane perpendicular to the longitudinal axis by means of extending the guide surface along the guiding direction.
  • the method further comprises the step of boosting the particle flow in a plane perpendicular to the longitudinal axis.
  • the boosting is provided by means of providing a longitudinal bar spaced apart parallel from the at least one wire emitter and the guide surface.
  • the longitudinal bar has a different electrostatic charge compared to the at least one wire emitter electrode for providing a second electrostatic force on the ionized particles from the at least one wire emitter electrode towards the longitudinal bar. This is suitable for electrically boosting the particle flow such that the particle flow follows at least partly a looped trajectory around the at least one wire emitter electrode and the longitudinal bar substantially seen in a plane perpendicular to the wire longitudinal axis.
  • the boosting is alternatively provided by, or additionally provided by means of arranging the guide surface with a deflector recess.
  • the deflector recess has a starting point and an ending point seen in the plane perpendicular to the first wire longitudinal axis.
  • the deflector recess is suitable for mechanically boosting the particle flow in the plane perpendicular to the first wire longitudinal axis.
  • the first wire emitter electrode is arranged substantially centred with respect to the starting point and the ending point for mechanically boosting the particle flow such that the particle follows at least partly a looped trajectory around the first wire emitter electrode.
  • Figure 1 shows a perspective view of a first embodiment of the invention
  • Figure 2 shows a top view of the first embodiment
  • Figure 3 shows a further embodiment to the first embodiment
  • Figure 4 shows a perspective view of a second embodiment of the invention
  • Figure 5 shows a top view of the second embodiment
  • Figure 6 shows a further embodiment to the second embodiment
  • Figure 7 shows a perspective view of a third embodiment of the invention.
  • figure 8a shows a side view of the third embodiment of the invention
  • figure 8b shows a side view of a further embodiment to the third embodiment
  • figure 9 shows a perspective view of an alternative embodiment to the third embodiment
  • figure 10a shows a side view of the alternative embodiment
  • figure 10b shows a side view of a further embodiment of the alternative embodiment
  • figure 1 1 shows a second further embodiment to the third embodiment of the invention
  • figure 12 shows a graphical representation concerning the second further embodiment
  • figure 13 shows a perspective view of a first alternative embodiment of the invention
  • figure 14 shows a perspective view of a second alternative embodiment of the invention.
  • figure 15a shows a side view of a fourth embodiment of the invention
  • FIG 15b shows a perspective view of the fourth embodiment
  • Figure 1 shows a particle catch device 201 according to a first embodiment of the invention.
  • the particle catch device 201 is suitable for removing particles from a polluted particle flow.
  • the particle catch device 201 comprises multiple first wire emitter electrodes 207a, 208a, 209b and multiple second wire emitter electrodes 207b, 208b, 209b.
  • the wire emitter electrodes 207a, 208a, 209a, 207b, 208b, 209b are suitable for locally ionizing particles.
  • the first wire emitter electrodes 107a, 108a, 109a each have a respective first wire longitudinally axis.
  • the respective first wire longitudinally axes are parallel with respect to each other.
  • the particle catch device 201 also comprises multiple guide surfaces 215, 216, 217.
  • Each multiple guide surface 215, 216, 217 is spaced apart parallel from a respective first wire longitudinal axis 207a, 208a, 209a for guiding a respective particle flow in a plane perpendicular with respect to the first wire longitudinal axis.
  • the guide surface 215, 216, 217 is charged with a different electrostatic charge compared to the respective first wire emitter electrode 207a, 208a, 209a for generating an electrostatic force on the ionized particles in a direction from the first wire emitter electrode 207a, 208a, 209a towards the guide surface 215, 216, 217.
  • Each multiple guide surface 215, 216, 217 is spaced apart parallel from a respective second wire longitudinal axis 207b, 208b, 209b for guiding a respective particle flow in a plane perpendicular with respect to the first wire longitudinal axis.
  • the guide surface 215, 216, 217 is charged with a different electrostatic charge compared to the respective second wire emitter electrode 207b, 208b, 209b for generating an electrostatic force on the ionized particles in a direction from the second wire emitter electrode 207a, 208a, 209a towards the guide surface 215, 216, 217.
  • the multiple guide surfaces 215, 216, 217 are arranged in a triangular configuration as can be seen in figure 2.
  • the particle catch device 201 comprises an outer shell surface 200 for guiding at least a part of the particle flow substantially in the plane perpendicular to the first wire longitudinal axis.
  • the outer shell surface 200 is cylindrical defining an interior space wherein the multiple first- and second wire emitter electrodes 207a, 208a, 209a, 207b, 208b, 209b and multiple guide surfaces 215, 216, 217 are located.
  • the outer shell surface 200 is formed by three closed outer shell surface parts 255, 256, 257and three open shell surface parts 275, 276, 277.
  • the open shell surface parts 275, 276, 277 allow air communication between the interior space and ambient.
  • This allows a particle flow 290a, 290b, 291 a, 291 b, 292a, 292b to enter and leave the interior space as shown in figure 2.
  • the particle flows 290a, 290b, 291 a, 291 b, 292a, 292b follow a looped trajectory around the wire emitter electrodes 207a, 208a, 209a, 207b, 208b, 209b.
  • the looped trajectory partly is inside the interior space and partly in the ambient.
  • a scavenging effect wherein one part of a particle flow enters the interior space defined by the outer shell surface and another part of the particle flow leaves the interior space contributes to a stability of the particle flow 290a, 290b, 291 a, 291 b, 292a, 292b.
  • the outer shell surface 200 at least partly encloses the multiple first wire emitter electrodes 207a, 208a, 209a, the multiple second first wire emitter electrodes 207b, 208b, 209b and the multiple guide surfaces 215, 216, 217. At least partly means that the surface comprises openings in the three open shell surface parts 275, 276, 277. Here, locally no enclosure occurs.
  • the outer shell surface 200 has as advantage that the outer shell surface 200 on the one hand shields particle flows 290a, 290b, 291 a, 291 b, 292a, 292b from unwanted external disturbances, such as a high intensity or turbulent wind, and on the other hand guides and boosts the particle flows 290a, 290b, 291 a, 291 b, 292a, 292b to follow the looped circular trajectory around the wire emitter electrodes 208a, 209a, 207b, 208b, 209b.
  • the outer shell surface 200 is cylindrically shaped and is circular seen in the plane perpendicular to the first wire longitudinal axis.
  • the multiple wire emitter electrode 208a, 209a, 207b, 208b, 209b are arranged substantially vertical with respect to a ground surface.
  • a support structure 240 the guide surfaces 215, 216, 217, outer shell surface 200 and wire emitter electrodes 208a, 209a, 207b, 208b, 209b are supported such that they remain at predefined distances with respect to each other.
  • longitudinal bars 220a, 220b, 221 a, 221 b, 222a, 222b are arranged in the outer shell surface 200.
  • the closed- and open outer shell surface parts 285, 286, 287 are arranged such that the particle flows 290a, 290b, 291 a, 291 b, 292a, 292b are following a looped trajectory around the respective wire emitter electrodes 208a, 209a, 207b, 208b, 209b and longitudinal bars 220a, 220b, 221 a, 221 b, 222a, 222b.
  • a second embodiment according to the invention is a particle catch arrangement 301.
  • the particle catch arrangement 301 is again vertically arranged, meaning that a first wire longitudinal axis 307a, 308a, 309a is arranged vertical to a ground plane.
  • the particle catch arrangement 301 comprises an outer shell surface 300 which is formed of three plate-like closed outer shell surface parts 355, 356, 357 and three plate-like open outer shell surface parts 375, 376, 377.
  • This particle catch arrangement 301 works similar to the particle catch device 201 of the first embodiment.
  • the outer shell surface 300 is arranged in a hexagonal configuration.
  • the closed outer shell surface parts 355, 356, 357 are arranged as guide surfaces 355, 356, 357 from which respective multiple first- and second wire emitter electrodes 307a, 307b, 308a, 308b, 309a, 309b are spaced.
  • Each closed outer shell surface part 355, 356, 357 is linked on both sides with an adjacent open outer shell surface part 375, 376, 377.
  • the open outer shell surface parts 375, 376, 377 allow particle flows 390a, 390b, 391 a, 391 b, 392a, 392b to enter and leave an interior space defined by the outer shell surface 300.
  • Each wire emitter electrode 307a, 307b, 308a, 308b, 309a, 309b generates its own respective particle flow 390a, 390b, 391 a, 391 b, 392a, 392b that follows a looped trajectory around the respective wire emitter electrode 307a, 307b, 308a, 308b, 309a, 309b.
  • a scavenging effect wherein one part of a particle flow 390a, 390b, 391 a, 391 b,
  • 392a, 392b enters the interior space defined by the outer shell surface 300 and another part of the particle flow leaves the interior space contributes to a stability of the particle flow 390a, 390b, 391 a, 391 b, 392a, 392b.
  • longitudinal bars 320a, 320b, 321 a, 321 b, 322a, 322b are arranged in the outer shell surface 300.
  • the closed- and open outer shell surface parts 355, 356, 357, 375, 376, 377 are arranged such that the particle flows 390a, 390b, 391 a, 391 b, 392a, 392b are following a looped trajectory around the respective wire emitter electrodes 307a, 307b, 308a, 308b, 309a, 309b and longitudinal bars 320a, 320b, 321 a, 321 b, 322a, 322b. Therefore, gaps are foreseen between the longitudinal bars 320a, 320b, 321 a, 321 b, 322a, 322b and the closed outer shell surface parts 355, 356, 357.
  • FIG. 7 shows a perspective view of a particle catch arrangement 1 according to a third embodiment of the invention.
  • the particle catch arrangement 1 comprises a support structure 2 having a first end 4a and a second end 4b.
  • the support structure comprises a first structural element 6a and a second structural element 6b at the first end 4a and the second end 4b respectively.
  • the first structural element 6a and the second structural element 6b are arranged substantially vertical with respect to a ground plane.
  • the particle catch arrangement 1 further comprises a charged fist wire emitter electrode 7 for locally ionizing particles.
  • the first wire emitter electrode 7a is held in tension by the support structure 2 between the first end 4a and the second end 4b.
  • the first wire emitter electrode 7a is elongated and has a first wire longitudinal axis XL
  • a first auxiliary bar 12a and a second auxiliary bar 12b are arranged to the first- and second structural elements 6a, 6b respectively, in which the auxiliary bars 12a, 12b are provided with a first- and a second isolator 10a, 10b.
  • the first wire emitter electrode 7a is held in tension via the isolators 10a, 10b in which the isolators 10a, 10b electrically isolate the first wire emitter electrode 7a from the support structure 2.
  • the auxiliary bars 12a, 12b are arranged substantially horizontally with respect to the ground plane.
  • the first wire emitter electrode 7a further comprises a guide surface 15 for guiding at least a part of a particle flow S substantially in a plane perpendicular to the first wire longitudinal axis X1.
  • Figure 8a shows the particle catch arrangement 1 in the plane perpendicular to the first wire longitudinal axis X1.
  • the guide surface 15 is spaced away parallel from the first wire emitter electrode 7a in a first direction Z1 perpendicular with respect to the first wire longitudinal axis X1.
  • the first direction Z1 is aligned with a smallest distance between the first wire emitter electrode 7a and the guide surface 15.
  • the guide surface 15 has a different electrostatic charge with respect to the first wire emitter electrode 7a for providing a first electrostatic force on the ionized particles.
  • the first electrostatic force is exerted on the ionized particles from the first wire emitter electrode towards the guide surface 15.
  • the first electrostatic force results from a corresponding first electrostatic field 30a generated from the first wire emitter electrode 7a towards the guide surface 15.
  • the direction of the first electrostatic field 30a and the corresponding first electrostatic force is substantially equal to the first direction.
  • the respective field and force have a direction that is substantially equal to the first direction.
  • the support structure 2 comprises a first longitudinal bar 20a spaced away parallel from the first wire emitter electrode 7a in a second direction Z2 perpendicular with respect to the first wire longitudinal axis XL
  • the second direction Z2 comprises a component that is opposite to the first direction Z1.
  • the second direction Z2 also comprises a component that is perpendicular to the first direction Z1.
  • the first wire emitter electrode 7a is provided substantially between the guide surface 15 and the first longitudinal bar 20a.
  • the first longitudinal bar 20a has a different electrostatic charge with respect to the first wire emitter electrode 7a and is suitable for providing a second electrostatic force, resulting form a second electrostatic field 30b, on the ionized particles.
  • the second electrostatic force is exerted from the first wire emitter electrode towards the first longitudinal bar 20a.
  • the first longitudinal bar 20a is provided such that the second electrostatic force is suitable for boosting the particle flow S such that the particle flow S at least partly follows a looped trajectory T1 around the first wire emitter electrode 7a and the first longitudinal bar 20a, seen in the plane perpendicular to the first wire longitudinal axis XL
  • the first electrostatic field 30a creates the first electrostatic force on ionized particles from the first wire emitter electrode 7a towards the guide surface 15.
  • the second electrostatic field 30b generates the second electrostatic force on ionized particles from the second wire emitter electrode 7 towards the first longitudinal bar 20a.
  • a trajectory of the particle flow S is indicated by means of a dashed line indicated by S.
  • a travelling particle in the particle flow S starts at a start location away from the guide surface 15, first wire emitter electrode 7a and the first longitudinal bar 20a and flows towards the guide surface 15.
  • the travelling particle is captured by the first electrostatic field 30a and the first electrostatic force moves the travelling particle to the guide surface 15 until it hits the guide surface 15.
  • the travelling particle shall boost, in other words deflect, in this perpendicular direction due to scavenging.
  • Ionized particles in the second electrostatic field 30b move in the second direction and indirectly draws the travelling particle that surrounds these ionized particles in substantially the same second direction. Drawing the travelling particle is named scavenging.
  • the travelling particle flows from the guide surface 15 towards the first longitudinal bar 20a. It shall not hit the first longitudinal bar 20a, but shall curve around the first longitudinal bar 20a as a result of scavenging effects originated by the particle flow S that flows from the start location towards the guide surface 15.
  • the presence of the first longitudinal bar 20a generates the second electrostatic field 30b that electrically boosts the travelling particle.
  • the particle flow S comprises at least partly a trajectory that loops around the first wire emitter electrode 7a and the first longitudinal bar 20a.
  • Figure 8b shows a further embodiment of the invention, wherein boosting of the particle flow S is additionally generated mechanically by means of a first deflector surface
  • the first deflector surface 25a is arranged spaced away from the guide surface 15.
  • the first deflector surface 25a in this case has a curved member. Spaced away here means that a first deflector longitudinal axis is spaced away from the guide surface 15. Seen in this plane perpendicular to the first wire longitudinal axis X1 a first deflector gap 26a is defined.
  • At least another part follows a trajectory through a space opposite from the first deflector gap 26a, preferably oriented in a direction towards the first longitudinal bar 20a.
  • This way the particle flow S is at least partly boosted mechanically towards the first longitudinal bar 20a and at least partly boosted along the guide surface 15.
  • the former results in a stronger first looped trajectory T1.
  • the latter results in collecting more polluted particles by the guide surface 15.
  • the first deflector surface 25a is provided at said location by the support structure 2.
  • a first collector 18a is arranged near the guide surface 15 for receiving particles from the particle flow S.
  • the first collector 18a is charged with a electrostatic charge that is opposite to the electrostatic charge of the first wire emitter electrode 7a. This is advantageous as the particle flow S is drawn towards the first collector 18a.
  • the first collector 18a is arranged to the guide surface 15 as shown in fig. 2a. Further preferably, the first collector 18a is arranged near the first deflector gap 26a where the particle flow S leaves the first deflector gap 26a. The particle flow S is then at least partly boosted mechanically by the first deflector surface 25a towards the first collector 18a.
  • the first collector 18a is made from a material being an electret.
  • Figure 9 shows a particular advantageous further embodiment wherein the particle catch arrangement 1 further comprises a second wire emitter electrode 7b.
  • the second wire emitter electrode 7b has a second wire longitudinal axis X2 and is held in tension between the first end and the second end of the support structure 2 via third- and fourth isolators 10c, 10d.
  • the second wire emitter electrode 7b is is spaced apart parallel from the first wire emitter electrode 7a defining a wire gap 28 between the first- and second wire emitter electrode 7a, 7b.
  • the particle flow S follows at least partly a trajectory through the wire gap 28 towards the guide surface 15.
  • the guide surface 15 is spaced away parallel from the second wire emitter electrode 7b in a third direction Z3 best shown in figure 10a.
  • the third direction Z3 is aligned with and along a smallest distance between the second wire emitter electrode 7b and the guide surface 15.
  • the guide surface 15 has a different electrostatic charge compared to the second wire emitter electrode 7b and is suitable for providing a third electrostatic force on the ionized particles.
  • the third electrostatic force results from a third electrostatic field 30c generated from the second wire emitter electrode 7b towards the guide surface 15.
  • the third electrostatic field 30c results in the particle flow S at least partly follows a trajectory from between the wire gap 28 towards the guide surface 15 in addition to the first electrostatic field 30a.
  • a second longitudinal bar 20b is arranged on the support structure 2 and is spaced away parallel from the second wire emitter electrode 7b in a fourth direction Z4
  • the fourth direction Z4 has a component that is opposite to the third direction Z3.
  • the fourth direction Z4 also comprises a component that is perpendicular to the third direction Z3.
  • the component of the fourth direction Z4 perpendicular to the third direction Z3 is opposite and aligned with the component of the second direction Z2 perpendicular to the first direction Z1. This is advantageous as the boosting by the first longitudinal bar 20a is synergetically added to the boosting by the second longitudinal bar 20b.
  • a fourth electrostatic force results from a fourth electrostatic field 30d resulting from the second longitudinal bar 20b having a different electrostatic charge compared with the second wire emitter electrode 7b.
  • the fourth electrostatic force substantially is in the fourth direction Z4 and therefore comprises a component that is perpendicular to the third direction Z3, the second longitudinal bar 20b boosts the particle flow S such that the particle flow S at least partly follows the second looped trajectory T2 around the second wire emitter electrode 7b and the second longitudinal bar 20b.
  • the first looped trajectory T1 is depicting at least a part of the particle flow S in clockwise direction.
  • the second looped trajectory T2 is in a different rotational direction and is depicting at least a part of the particle flow S in counter clockwise direction.
  • the arrangement of the second longitudinal bar 20b, second wire emitter electrode 7b and guide surface 15 has the same advantages as the arrangement of the first longitudinal bar 20a, first wire emitter electrode 7a and guide surface 15.
  • having them both arranged substantially symmetrical to each other in a plane perpendicular to the guide surface 15 and parallel between the first wire longitudinal axis X1 and the second wire longitudinal axis X2 results in a synergetic effect.
  • a strength of the first looped trajectory T1 and the second looped trajectory T2 is stronger when they are combined than when they are arranged separately.
  • This results from the second direction Z2 has a component opposite and aligned with respect to the fourth direction Z4 and the first direction Z1 and third direction Z3 are substantially pointing in a same direction, although not aligned.
  • Figure 10b shows a further symmetrical arrangement of a second deflector surface 25b and second deflector gap 26b with respect to the first deflector surface 25a and the first deflector gap 26a. Also a second collector 18b is symmetrically arranged with respect to the first collector 18a.
  • the same advantages apply for the second case indicated by a letter "b" as well as for the first case indicated by a letter "a”.
  • Figure 1 1 shows a further embodiment to the third embodiment for the case of two wire emitter electrodes 7a, 7b and two longitudinal bars 20a, 20b. Shown are the first wire emitter electrode 7a and the second wire emitter electrode 7b and the first longitudinal bar 20a and the second longitudinal bar 20b. Not shown, but present is the guide surface 15 according to the invention.
  • the particle catch arrangement 1 further comprises a first voltage generator 40a for providing a voltage, in particular a high voltage, to the first wire emitter electrode 7a and the second wire emitter electrode 7b.
  • a first voltage generator 40a for providing a voltage, in particular a high voltage, to the first wire emitter electrode 7a and the second wire emitter electrode 7b.
  • the first voltage generator 40a is configured to receive a voltage setting signal PL Based on a value of the voltage setting signal P1 , the first voltage generator 40a provides a corresponding voltage to the first wire emitter electrode 7a.
  • control unit 35 is configured to provide the voltage setting signal P1.
  • control unit 35 give a value to the voltage setting signal P1 such the voltage provided to the first wire emitter electrode 7b remains constant.
  • the first longitudinal bar 20a is provided with a first bar electrode, which is isolated in the support structure 2. By having the first longitudinal bar 20a provide with the first bar electrode it allows to easily charge the first longitudinal bar 20a. In an alternative, the first longitudinal bar 20a is the same as the first bar electrode. This is advantageous, as the first bar electrode is a accurately chargeable surface as well as a structural member giving support to the particle catch arrangement 1.
  • a first electrical field 30a is generated from the first wire emitter electrode 7a towards the first longitudinal bar 20a. This results in that ions hit the first bar electrode such that a current is generated in the first bar electrode. This current is measured by means of a first current sensor 37a.
  • the first current sensor 37a is configured to provide a first current measurement signal P2 representative for the current in the first longitudinal bar 20a.
  • the first current measurement signal P2 is not constant with time, but in general shall vary as indicated in figure 6.
  • the first current measurement signal P2 on the vertical diagram axis is displayed as function of time on the horizontal diagram axis.
  • the first current measurement signal P2 shall gradually increase. This is a result of the dispersion of small metal particles from the first wire emitter electrode 7a, such that emitting of the first wire emitter electrode 7a increases resulting in more charged ions. With the first wire emitter electrode 7a getting thinner due to its dispersion of the small metal particles a risk of breaking of the first wire emitter electrode 7a increases.
  • control unit 35 is configured to receive the first current measurement signal P2 and control the voltage setting signal such that the first current measurement signal P2 remains substantially the same as the initial value of the first current measurement signal P2.
  • the increase of the first current measurement signal P2, indicated by L1 is representative for a thickness of the first wire emitter electrode 7a and therefore the duration of life thereof. This information is particular useful to have an indication to a user about a need to precautionary maintenance.
  • the first current measurement signal P2 shall decrease as ions in the first electrostatic field 30a shall collide with these particles and be moved away into for example the first looped trajectory T1 due to scavenging.
  • a decrease of the first current measurement signal P2, indicated by L2 is representative for an amount of catching of particles. This information is particular useful to have an indication to a user about an amount of captured particles. It easily gives
  • a second current sensor 37b which is configured to provide a second current measurement signal P3 representative for the current in the first wire emitter electrode 7a. Although not shown, it is particularly useful to provide the second current measurement signal P3 to the control unit 35.
  • the control unit 35 is configured to receive the second current measurement signal P3. This is advantageous, as more control options are available increasing the duration of life of the particle catch arrangement 1.
  • a first voltage sensor 38a which is configured to provide a first voltage measurement signal P4 representative for the voltage in the first wire emitter electrode 7a.
  • the control unit 35 is configured to receive the first voltage measurement signal P4. This is advantageous, as more control options are available increasing the duration of life of the particle catch arrangement 1.
  • the control unit 35 is configured to display received signals and emitted voltages on the display. For example the received signals and emitted voltage are displayed momentary and/or along a predetermined time span, such as seen in figure 12. This allows the user to take appropriate action, for example starting precautionary maintenance when needed.
  • Figure 13 shows an alternative embodiment of the invention. Shown are the first wire emitter electrode 7a and the second emitter electrode 7b being arranged parallel with respect to each other and with respect to the guide surface 15 which here is displayed below the wire emitter electrodes 7a, 7b.
  • the guide surface 15 comprises a first protruding deflector 33a for mechanically boosting the particle flow S such that it at least partly follows a first looped trajectory T1 and at least partly a second looped trajectory T2.
  • the first protruding deflector 33a protrudes towards the wire emitter electrodes 7a, 7b. This is particularly advantageous as it not only mechanically boosts the particle flow S to follow the looped trajectories T1 , T2 but also reduces external flow disturbances resulting from for example external wind and/or ventilation. These external flow disturbances may have an adverse effect on the particle flow S following the looped trajectories T1 , T2.
  • a catalyst such as titan oxide. Due to the particle flow S following the looped trajectory T1 , T2 there are multiple contact moments between the surface of the first protruding deflector 33a and the particle flow S.
  • titan oxide reacts with nitrogen oxides (NO x ) into a less polluting aerosol, being an ionized particle, the aerosol is captured by the particle flow S and eventually collected and removed from the air.
  • Activation of the catalyst is provided by ultraviolet radiation from the first wire emitter electrode 7a and/or the second wire emitter electrode 7b.
  • the second wire emitter electrode 7b is arranged nearest to the first protruding deflector surface 34a.
  • the first protruding deflector surface 34a stretches out over a surface closer to the first wire emitter electrode 7a.
  • Ultraviolet radiation is emitted as by-product during the corona gas discharge, being the ionization of the air molecules.
  • a distance between the first protruding deflector 33a and the second wire emitter electrode 7b is such that sufficient ultraviolet radiation is received by the first protruding deflector surface 34a.
  • the first protruding deflector surface 34a is provided with a reflection layer (not shown).
  • This reflection layer is made from a material that reflects the ultraviolet radiation received from the second wire emitter electrode 7b. Reflecting the ultraviolet radiation between the first protruding deflector surface 34a and the second wire emitter electrode 7b results in an antiseptic action on the particle flow S that follows the second looped trajectory T2. As the second looped trajectory T2 is stably provided between the first protruding deflector surface 34a and the second wire emitter electrode 7b, the antiseptic action results in the decomposition of polluted particles such as in particular hydrocarbons and more in particular aromatic hydrocarbons that are in the particle flow S. A direction of ultraviolet reflection is indicated by an arrow R1.
  • first protruding fibres 50a are provided near the first wire emitter electrode 7a.
  • the first protruding fibres 50a protrude from the guide surface 15 and are arranged such that the first wire emitter substantially is between the first protruding fibres 50 and the first protruding deflector surface 34a.
  • the first protruding fibres 50 typically have a hair-shaped structure. Due to molecular forces, being Coulomb forces, the first protruding fibres 50 collect larger polluted particles and remove them from the particle flow S that follows the first looped trajectory T1. Collection by means of fibres and resulting molecular forces is particular advantageous as a thickness of the fibres is dependent on a size of the polluted particles to be collected.
  • collectors comprising second protruding fibres 50b are provided to the guide surface near the second wire emitter electrode 7b.
  • the collectors comprise a first substrate 51 a that is charged by a second voltage generator 40b.
  • the first substrate 51 a is arranged between the guide surface 15 and the first protruding fibres 50a. This is advantageous as a collection and interception action of the respective collector is increased and also allows for the capturing and interception of suspended particles such as oil mist, haze and fog.
  • a liquid is added to the first substrate 51a by a liquid generator (not shown). This allows for gas removal, such as ammoniac gas.
  • gas removal such as ammoniac gas.
  • the first protruding fibres 50a result in a capillary action and the humid atmosphere due to the liquid results in the gas removal.
  • collectors comprising a charged second substrate 52b are provided to the guide surface 15. Also shown is a corresponding second drain 52b.
  • Figure 14 shows a perspective view of a second alternative embodiment of the invention. It shows a particle catch assembly comprising three particle catch arrangements according to the third embodiment. Shown are six wire emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f, being the first wire emitter electrode 7a, the second wire emitter electrode 7b, a third wire emitter electrode 7c, a fourth wire emitter electrode 7d, a fifth wire emitter electrode 7e and a sixth wire emitter electrode 7d respectively.
  • the wire emitter electrodes emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f are charged by a single third voltage generator 40c, therefore the emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f are electrically connected with each other.
  • six isolator tubes 65a, 65b, 65c, 65d, 65e, 65f are provided around a connection part between the emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f. This is to electrically isolate the connection parts between the emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f from the environment, such that only parallel arranged emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f are present. This is advantageous for stably generating the six looped trajectories.
  • the guide surface comprises four collectors each comprising a substrate 51 a, 51 b, 51 c, 51 d and protruding fibres 50a, 50b, 50c, 50d.
  • the guide surface also comprises three protruding deflectors 33a, 33b, 33c each having a protruding deflector surface 34a, 34b, 34c.
  • the collectors and the protruding deflectors function as guide surface and in this embodiment the guide surface is interrupted.
  • the guide surface is formed integrally.
  • the particle catch assembly is arranged such that the emitter electrodes 7a, 7b, 7c, 7d, 7e, 7f are substantially vertically arranged and perpendicular with respect to a ground plane.
  • the guide plane therefore is also perpendicular to the ground plane.
  • the protruding deflectors 33a, 33b, 33c are elongated along their respective longitudinal axis X10, X1 1 , X12.
  • the protruding deflector longitudinal axes X10, X1 1 , X12 are perpendicular to the ground plane.
  • a liquid generator 60a, 60b, 60c, 60d is arranged to humidify and/or liquefy the protruding fibres 50a, 50b, 50c, 50d and clean them. Polluted particles are mixed with the liquid and the polluted liquid is captured by funnel shaped drains 62a, 62b, 6c, 62d.
  • the funnel shaped drains 62a, 62b, 6c, 62d are arranged below the protruding fibres 50a, 50b, 50c, 50d and below the liquid generators 60a, 60b, 60c, 60d.
  • a single drainage tube 65 connects all the funnel shaped drains 62a, 62b, 6c, 62d and conveys the polluted liquid to a central point.
  • a single water supply tube 61 connects all the liquid generator 60a, 60b, 60c, 60d and supplies liquid from a central source.
  • figure 15a and figure 15b show an embodiment of a second particle catch device 101 according to a fourth embodiment of the invention.
  • Figure 15a shows the particle catch device 101 in a side view.
  • the particle catch device 101 is suitable for removing particles from a polluted particle flow S2.
  • the particle catch device 101 comprises a first wire emitter electrode 107a for locally ionizing particles having a first wire longitudinal axis.
  • a guide surface 1 15 is spaced apart parallel from the first wire longitudinal axis 107a for guiding a particle flow S2 in a plane perpendicular with respect to the first wire longitudinal axis.
  • the guide surface 1 15 is charged with a different electrostatic charge compared to the first wire emitter electrode 107a for generating an electrostatic force on the ionized particles in a direction from the first wire emitter electrode 107a towards the guide surface 1 15.
  • the guide surface 1 15 is arranged with a first boost deflector 70a having a starting point 71 and an ending point 72 seen in a plane perpendicular to the first wire longitudinal axis for mechanically boosting the particle flow S2.
  • the boost deflector 70a is shaped such that the particle flow S2 follows at least partly a first looped trajectory T101 around the first wire emitter electrode 107a.
  • the first boost deflector 70a is shaped substantially the same as the first looped trajectory T101.
  • a second wire emitter electrode 107b which is spaced away from the first wire emitter electrode 107a.
  • This second wire emitter electrode 107b cooperates with a second boost deflector 70b and boosts at least a part of the particle flow S2 into a partly curved trajectory.
  • the second wire emitter electrode 107b is charged with a lower voltage than the first wire emitter electrode 107a, such that a full looped trajectory does not occur around the second wire emitter electrode 107b.
  • a third wire emitter electrode 107c spaced away parallel to a third boost deflector 70c for generating a second looped trajectory T102.
  • a fourth wire emitter electrode 107d is spaced away parallel from the third wire emitter electrode 107c and cooperates with a fourth boost deflector 70d and boosts at least a part of the particle flow S2 into a partly curved trajectory.
  • the fourth wire emitter electrode 107d is charged with a lower voltage than the third wire emitter electrode 107c, such that a full looped trajectory does not occur around the fourth wire emitter electrode 107d.
  • a part of the guide surface between the first boost deflector and fourth boost deflector is covered with titanium oxide to filter nitrogen oxide gas from the air flow.
  • the particle catch arrangements and/or devices according to the invention is not limited to the described embodiments. Any combination of the described embodiments is possible and foreseen.
  • the length of the wire emitter electrode is substantially smaller and/or equal to 10m, 6m or 3m.
  • the smallest distance to the guide surface is respectively substantially smaller than 1 m, 0.5m or 0.25m.
  • the voltage applied to at least one wire emitter electrode is 1.5-50 kV, more in particular 2-45 kV.
  • At least one generated electrostatic field is at least 0.2 kV/m more in particular in the range of 0.2-50 kV/m.
  • the longitudinal bar has a constant thickness or a varying thickness along the length. It may be a straight longitudinal bar or a bend and/or curved longitudinal bar.
  • the wire emitter electrode has a constant thickness or has a varying thickness along the length.
  • the wire is foreseen to be flexible or non flexible or even be a thin bar like electrode. In general it is an elongated corona discharger.
  • the multiple guide surfaces as disclosed in the first- and second embodiments can be combined with the other disclosed embodiments.
  • detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriate detailed structure. Further, the terms and phrases used herein are not intended to be limiting, but rather, to provide an understandable description of the invention.

Landscapes

  • Electrostatic Separation (AREA)

Abstract

L'invention porte sur un moyen de piégeage de particules qui permet d'éliminer des particules d'un flux d'air pollué par des particules. Le moyen comprend une structure de support, une électrode d'émetteur à fil et une surface de guidage. La surface de guidage est espacée et écartée du fil de manière parallèle dans une première direction perpendiculaire par rapport au fil. La surface de guidage présente une charge électrostatique différente de celle du fil, de façon à produire une force électrostatique. La structure de support comprend une barre espacée et écartée du fil de manière parallèle dans une seconde direction perpendiculaire par rapport au fil. La seconde direction a une composante qui est opposée à la première direction et une composante qui est perpendiculaire à la première direction. La barre présente une charge électrostatique différente de celle du fil pour accélérer le flux de particules de sorte que ledit flux de particules suive une trajectoire en boucle autour du fil et de la barre.
EP12780303.9A 2011-10-06 2012-10-01 Moyen de piégeage de particules permettant d'éliminer des particules d'un flux pollué Active EP2763795B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12780303T PL2763795T3 (pl) 2011-10-06 2012-10-01 Układ wychwytywania cząstek do wychwytywania cząstek ze strumienia zanieczyszczonych cząstek

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL2007548A NL2007548C2 (en) 2011-10-06 2011-10-06 Particle catch arrangement for catching particles from a polluted particle flow.
NL2008818A NL2008818C2 (en) 2011-10-06 2012-05-15 Particle catch arrangement for catching particles from a polluted particle flow.
PCT/NL2012/050685 WO2013051931A1 (fr) 2011-10-06 2012-10-01 Moyen de piégeage de particules permettant d'éliminer des particules d'un flux pollué

Publications (3)

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EP2763795A1 true EP2763795A1 (fr) 2014-08-13
EP2763795B1 EP2763795B1 (fr) 2019-12-04
EP2763795B8 EP2763795B8 (fr) 2020-01-15

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EP (1) EP2763795B8 (fr)
CN (1) CN103917298B (fr)
NL (1) NL2008818C2 (fr)
PL (1) PL2763795T3 (fr)
WO (1) WO2013051931A1 (fr)

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FR3115713A1 (fr) * 2020-11-03 2022-05-06 Aérogroupe Dispositif purificateur d’air

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CN105597932B (zh) * 2016-02-18 2018-03-20 北京中和锦程科技有限公司 电晕风空气净化装置
MX359868B (es) 2017-05-08 2018-09-25 Monroy Sampieri Carlos Sistema para captacion y monitoreo de agentes contaminantes atmosfericos.
CN110227607B (zh) * 2019-06-18 2020-12-04 兰州裕隆气体股份有限公司 一种智能气体净化系统及其控制方法

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ATE40302T1 (de) * 1984-12-21 1989-02-15 Bbc Brown Boveri & Cie Verfahren und vorrichtung zur entstaubung eines feste oder fluessige partikel in suspension enthaltenden gasstromes mittels eines elektrischen feldes.
JP3004938B2 (ja) * 1997-03-07 2000-01-31 株式会社オーデン 電気集塵装置及びその製造方法
EP1829614A1 (fr) 2006-03-02 2007-09-05 Technische Universiteit Delft Procédé pour enlever le fumeron, poussières fines et particules des gaz d'échappement, appareil collecteur de particules pour l'utilisation dans ce procédé et utilisation de cet appareil pour générer d'un champ électrique statique
CN200977477Y (zh) * 2006-12-06 2007-11-21 广州市粤首实业有限公司 上进气折角和梯槽板电除尘式气流均布烟箱
DE102008005198A1 (de) * 2008-01-18 2009-07-23 Gerhard Zehdnicker Vorrichtung und Verfahren zur Abscheidung von Aerosolen und Feinstaub aus einer frei bewegten Luftmasse
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FR3115713A1 (fr) * 2020-11-03 2022-05-06 Aérogroupe Dispositif purificateur d’air
FR3115712A1 (fr) * 2020-11-03 2022-05-06 Aérogroupe Dispositif purificateur d’air

Also Published As

Publication number Publication date
EP2763795B8 (fr) 2020-01-15
EP2763795B1 (fr) 2019-12-04
NL2008818A (en) 2013-04-09
CN103917298A (zh) 2014-07-09
PL2763795T3 (pl) 2020-06-29
NL2008818C2 (en) 2013-10-03
CN103917298B (zh) 2016-08-17
WO2013051931A1 (fr) 2013-04-11

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