EP3865217A1 - Einzoniger federbelasteter elektrostatischer luftbehandlungsfilter und verfahren - Google Patents

Einzoniger federbelasteter elektrostatischer luftbehandlungsfilter und verfahren Download PDF

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Publication number
EP3865217A1
EP3865217A1 EP20167949.5A EP20167949A EP3865217A1 EP 3865217 A1 EP3865217 A1 EP 3865217A1 EP 20167949 A EP20167949 A EP 20167949A EP 3865217 A1 EP3865217 A1 EP 3865217A1
Authority
EP
European Patent Office
Prior art keywords
spring
electrodes
deposition
shaped
particulate matter
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Withdrawn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
EP20167949.5A
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English (en)
French (fr)
Inventor
Pranas Baltrenas
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.)
Vilniaus Gedimino Technikos Universitetas
Original Assignee
Vilniaus Gedimino Technikos Universitetas
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 Vilniaus Gedimino Technikos Universitetas filed Critical Vilniaus Gedimino Technikos Universitetas
Publication of EP3865217A1 publication Critical patent/EP3865217A1/de
Withdrawn legal-status Critical Current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
    • B03C3/74—Cleaning the electrodes
    • B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
    • 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
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B03C3/0175—Amassing particles by electric fields, e.g. agglomeration
    • 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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/368—Controlling flow of gases or vapour by other than static mechanical means, e.g. internal ventilator or recycler
    • 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
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-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
    • B03C3/45—Collecting-electrodes
    • B03C3/49—Collecting-electrodes tubular

Definitions

  • the invention relates to an air treatment equipment used for eliminating particulate matter from an air stream under the action of Coulomb force.
  • Electrostatic filters are widely applied for removing solid and liquid aerosol particles from an air stream, they can operate under considerably varying temperatures, have high treatment effectiveness and low aerodynamic resistance.
  • Electrostatic air treatment filters are extensively employed for purifying ambient air exhausted from power installations combusting conventional and biofuels and for collecting coolants or other types of technological fluid aerosols thus redirecting them to the technological process from the occurring high-intensity machining operations such as grinding, turning, drilling, welding, thermal hardening as well as in order to protect against the loss of technological materials during shredding, milling, sifting, bulk material transportation and reloading.
  • Electrostatic filters are widely used for protecting the atmospheric air through the collection of solid and liquid aerosols, operating technological equipment, eliminating car exhaust fumes from ambient air, reducing smog in tunnels and high-intensity transport junctions to decrease fine-dispersed feedstock losses in technological milling and sieving processes, transporting bulk materials in construction and chemical industries, metallurgy, mining, metalworking, woodworking, agriculture and energy sectors.
  • a prototype of the presented invention is a dual ionization electrostatic filter ( US4351648 ) used for removing particulate matter from air.
  • the unit consists of the rectangular housing of the air filter containing a ionization cartridge consisting of a flat thin-walled deposition electrode system with thin-wire ionization electrodes housed therein. Both ionization and deposition electrodes are segregated from the filter housing.
  • a positive high voltage power supply is transmitted to ionization electrodes, whereas a negative high voltage power supply is transmitted to deposition electrodes.
  • the electric field strength gradient between the ionization electrode and the electrode increases, thereby achieving a higher rate of particulate movement towards the deposition electrode and collecting them more effectively employing high and lower-voltage power supplies.
  • the present invention relates to the structure of the electrostatic filter designed for removing fine-dispersed particulate matter from the air stream, increasing the air treatment effectiveness, improving efficiency and simplifying exploitation.
  • the single zone spring-loaded electrostatic filter of the present invention for removing fine-dispersed particulate matter from the air comprises the rectangular casing containing a spring-loaded matrix of ionizing and deposition spring-shaped electrodes.
  • the geometric centre of the spring-shaped deposition electrode encloses a wiry spring-shaped ionization electrode having a wire and spring diameter that is much smaller than that of the spring-shaped deposition electrode.
  • Ionization electrodes are isolated from the filter housing and connected to negative and positive high voltage power supplies.
  • the supply voltage of ionizing electrodes has been selected to get a corona discharge (U>300 V/mm) between the ionizing electrode and deposition electrodes.
  • the ionizing electrode power scheme is designed in order the fan transmits the dusty air (biphasic stream) in succession through negative and positive ionization zones.
  • the distance from a particulate to the deposition surface and the angle between the trajectory of the air stream and the deposition surface constantly change in the spring-loaded filter according to a rotating cyclic law.
  • the probability that the angle between the deposition surface and the movement trajectory and the distance to the deposition surface are optimal for reliable deposition and adhesion increases.
  • the maximum migration path of the deposited particle is equal to the one quarter of the winding step of the helical deposition electrode rather than to the distance between the ionization electrode and the deposition electrode.
  • a reduction in the migration path of the particle decreases time spent on deposition thus significantly minimizing the likelihood of particle deposition under similar conditions.
  • Particulate matter moves through the ionization zones having different charges, and therefore, due to the varying nature, chemical composition and size of the particles, changes in charges occur at different rates. Hence, there is an increased likelihood of co-occurring differently charged particles, thus becoming coagulation centres. Larger particles move towards the deposition electrode much faster than the small ones, thereby reducing their deposition time and the likelihood that the particle will remain non-deposited.
  • a helical structure has been used for facilitating the removal of particulate matter deposited on the surface of deposition electrodes.
  • Spring-loaded structures are distinguished by a strongly expressed resonant frequency of the mechanical structure. If any point on the deposition electrode is affected by extraneous force, elastic forces transfer mechanical motion to the entire surface of the deposition electrode, thereby removing particulate matter deposits from the entire surface of the deposition electrode.
  • Spring-loaded structures have the strongly expressed resonant frequency of the mechanical structure coinciding with the resonant frequency of the mechanical system.
  • the figures provide the images of the single-piece spring-loaded electrostatic air treatment filter.
  • the single zone spring-loaded electrostatic air treatment filter used for removing fine-dispersed aerosols comprises the casing containing the right 11 and the left 12 walls between which the air stream 9 contaminated with particulate matter (biphasic stream) is transmitted by the fan r 6 to the spring-loaded matrix of electrodes composed of a plurality of spring-shaped deposition electrodes 1 and spring-shaped positive and negative ionization electrodes 2, 3 installed in the centres of spring-shaped deposition electrodes 1.
  • Spring-shaped ionization electrodes 2, 3 are insulated from the filter housing.
  • the built-in spring-shaped deposition electrodes 1 are mounted vertically adjacent to each other in a cellular manner so that the coils of adjacent spring-shaped deposition electrodes 1 overlap thus increasing the strength of the electrostatic field in these areas and the charge of the particles, which improves air treatment effectiveness.
  • Spring-shaped deposition electrodes 1 overlap by 1 ⁇ 2 r, where r is the spring radius.
  • the positive high voltage power supply 4 and the negative high voltage power supply 5 are connected to negative and positive spring-shaped ionization electrodes 2 and 3 respectively.
  • the negative voltage power supply 5 is connected to negative ionization electrodes 2 via the voltage regulator 8.
  • negative voltage is transmitted to the negative ionizing electrode and is monitored according to the output signal sent by the gauge 7 installed in the outlet of the electrostatic filter and measuring the residual concentration of particulate matter.
  • the vibrator 10 assists in transmitting vibrations to the coil of one of deposition electrodes 1.
  • the created vibrations remove particulate matter accumulated on the surface of the deposition electrode 1.
  • Mechanical vibrations created employing the overlapping coils of adjacent spring-shaped electrodes 1, as shown in Fig. 3 are transmitted to the entire matrix of spring-shaped deposition electrodes.
  • the single zone spring-loaded electrostatic air treatment filter used for removing fine-dispersed particulate matter is equipped with the fan 6 transmitting the air contaminated with particulate matter (biphasic stream) to the matrix of ionization electrodes 2, 3 between the right 11 and the left 12 walls of the casing.
  • the fan 6 transmits the air contaminated with particulate matter perpendicular to the axes of deposition electrodes via the gaps between spring-shaped deposition electrodes 1. Since negative and positive high voltage exceeding 300V/mm is transmitted to the centres of spring-shaped deposition electrodes 1 passing ionization electrodes 2, 3, a corona discharge occurs among central ionization electrodes 2, 3 and earthed deposition electrodes 1 thus forming negative and positive ionization zones.
  • Particulate matter moves together with air stream 9, interacts with electron and ion streams generated in the ionization zone and becomes electrically charged.
  • F Coulomb force
  • a corona discharge between ionization electrodes results in the partial ionization of air molecules thus generating radicals and ozone, which is a much more intense process in the case of a negative corona discharge.
  • the regulation of negative ionization intensity has been introduced.
  • the gauge 7 captures low concentration values. According to this signal, the voltage regulator 8 reduces the voltage of negative-voltage power supply 5 transmitted to negative ionizers 2. At the same time, a low concentration of radicals and ozone is ensured in the recirculated air. Along with an increase in the concentration of particulate matter entering the filter, the concentration gauge 7 starts recording higher values. Considering the signal sent to the voltage regulator 8, higher negative supply voltage is transmitted to negative ionizers, which increases the treatment effectiveness of the filter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Separation (AREA)
EP20167949.5A 2020-02-11 2020-04-03 Einzoniger federbelasteter elektrostatischer luftbehandlungsfilter und verfahren Withdrawn EP3865217A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LT2020511A LT6849B (lt) 2020-02-11 2020-02-11 Vienazonis spyruoklinis elektrostatinis oro valymo filtras ir būdas

Publications (1)

Publication Number Publication Date
EP3865217A1 true EP3865217A1 (de) 2021-08-18

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EP20167949.5A Withdrawn EP3865217A1 (de) 2020-02-11 2020-04-03 Einzoniger federbelasteter elektrostatischer luftbehandlungsfilter und verfahren

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EP (1) EP3865217A1 (de)
LT (1) LT6849B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114797256A (zh) * 2022-04-13 2022-07-29 武汉理工大学 一种基于平衡电荷净化技术的润滑油净化装备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB835012A (en) * 1956-03-15 1960-05-18 Carves Simon Ltd Improvements relating to electrostatic precipitators
US4351648A (en) 1979-09-24 1982-09-28 United Air Specialists, Inc. Electrostatic precipitator having dual polarity ionizing cell
JPS5889956A (ja) * 1981-11-24 1983-05-28 Ono Gijutsu Kenkyusho:Kk 電気集塵装置
DE4002456A1 (de) * 1990-01-27 1991-08-01 Metallgesellschaft Ag Elektrostatischer staubabscheider fuer horizontalen gasdurchgang
DE102012013996A1 (de) * 2012-07-13 2014-05-28 Eisenmann Ag Vorrichtung zum Abscheiden von Feststoffpartikeln und Beschichtungsanlage mit einer solchen
EP3034174A1 (de) * 2014-12-08 2016-06-22 Svoboda Piotr Slebioda Zyklonfilter mit zusätzlicher elektrostatischer einheit
EP3067118A2 (de) * 2015-03-09 2016-09-14 Kutzner + Weber GmbH Elektrostatische partikelabscheidevorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB835012A (en) * 1956-03-15 1960-05-18 Carves Simon Ltd Improvements relating to electrostatic precipitators
US4351648A (en) 1979-09-24 1982-09-28 United Air Specialists, Inc. Electrostatic precipitator having dual polarity ionizing cell
JPS5889956A (ja) * 1981-11-24 1983-05-28 Ono Gijutsu Kenkyusho:Kk 電気集塵装置
DE4002456A1 (de) * 1990-01-27 1991-08-01 Metallgesellschaft Ag Elektrostatischer staubabscheider fuer horizontalen gasdurchgang
DE102012013996A1 (de) * 2012-07-13 2014-05-28 Eisenmann Ag Vorrichtung zum Abscheiden von Feststoffpartikeln und Beschichtungsanlage mit einer solchen
EP3034174A1 (de) * 2014-12-08 2016-06-22 Svoboda Piotr Slebioda Zyklonfilter mit zusätzlicher elektrostatischer einheit
EP3067118A2 (de) * 2015-03-09 2016-09-14 Kutzner + Weber GmbH Elektrostatische partikelabscheidevorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114797256A (zh) * 2022-04-13 2022-07-29 武汉理工大学 一种基于平衡电荷净化技术的润滑油净化装备
CN114797256B (zh) * 2022-04-13 2023-06-30 武汉理工大学 一种基于平衡电荷净化技术的润滑油净化装备

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Publication number Publication date
LT2020511A (lt) 2021-08-25
LT6849B (lt) 2021-09-27

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