EP2321066B1 - Vorrichtung zum abscheiden von lack-overspray - Google Patents

Vorrichtung zum abscheiden von lack-overspray Download PDF

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Publication number
EP2321066B1
EP2321066B1 EP09777847.6A EP09777847A EP2321066B1 EP 2321066 B1 EP2321066 B1 EP 2321066B1 EP 09777847 A EP09777847 A EP 09777847A EP 2321066 B1 EP2321066 B1 EP 2321066B1
Authority
EP
European Patent Office
Prior art keywords
electrode
high voltage
separation
overspray
voltage source
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.)
Not-in-force
Application number
EP09777847.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2321066A1 (de
Inventor
Jan Reichler
Werner Swoboda
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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 Eisenmann SE filed Critical Eisenmann SE
Publication of EP2321066A1 publication Critical patent/EP2321066A1/de
Application granted granted Critical
Publication of EP2321066B1 publication Critical patent/EP2321066B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/025—Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators or dry-wet separator combinations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/08—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/42—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using electrostatic means

Definitions

  • Such a device is for example from the US 5 264 014 A known.
  • a partial flow of the lacquer which generally contains both solids and solvents and / or binders, is not applied to the article.
  • This partial flow is called "overspray" in the professional world. The overspray is detected by the air flow in the spray booth and fed to a separation.
  • wet separation systems are used.
  • wet separators known from the market
  • this nozzle there is a turbulence of the flowing through Cabin exhaust takes place with the water.
  • the overspray particles largely pass into the water, so that the air leaves the wet scrubber substantially cleaned and the paint overspray particles are in the water. From this they can then be recovered or disposed of.
  • an electrostatic precipitator in which a plurality of units are arranged in the flow direction for a gas to be cleaned in a row, which can be controlled by their own control circuits.
  • Object of the present invention is to develop a device of the type mentioned so that the troubleshooting is easier when errors occur in the high voltage range and the downtime of the entire device are reduced in this way and that the energy efficiency is increased.
  • the electrode device at which the defect is located can easily be detected and then switched off.
  • the entire device need not be shut down in this case, but can be continued in an emergency operation, which still makes a sufficient separation of the paint overspray possible.
  • a desired side effect of this kind To be able to supply different electrode device independently with high voltage, is that the electrode means that are not needed, can be turned off, whereby a considerable energy savings is achieved.
  • a first possibility of independently applying high voltage to the electrode devices and / or the multiple regions of the same electrode device is that these electrode devices or regions can be connected to one and the same high-voltage source. In this case, so only a single high voltage source is needed.
  • a switching device corresponding contactors can be used.
  • a somewhat more sophisticated way of applying high voltage independently is that each of the plurality of electrode devices and / or each of the multiple regions of the one electrode device is associated with its own high voltage source. In this way, with a somewhat higher expenditure on equipment, the possibility of an emergency operation is obtained even in the event that an error occurs in the area of a high-voltage source. The other electrode devices and / or the other regions of the electrode device can then still be operated from the associated high voltage source. In addition, in this embodiment, the capacities are lower; the charge reduced in case of a rollover is smaller.
  • At least one electrode device comprises a plurality of corona wires as well as a flat, preferably planar field electrode as regions which can be acted upon independently with high voltage.
  • corona wires finds then the ionization of the overspray particles instead, while in the field of the planar field electrode substantially the deposition of overspray particles runs on the Abscheide perennial.
  • each group being an area of the electrode device which can be acted upon independently with high voltage.
  • each group being an area of the electrode device which can be acted upon independently with high voltage.
  • the highest voltage is generally applied to the group of corona wires which is furthest away from the sheet-like field electrode.
  • the division of the corona wires into several groups also has the advantage that the individual groups can be controlled cyclically. Again, this is associated with a certain energy savings.
  • cyclically switching on the various regions of the electrode device has the advantage that the adhesion of overspray particles to the deposition surface is reduced in the region opposite the corona wire, where this is not desired.
  • FIGS. 1 and 2 Referenced.
  • a spray booth a bruisenbehandlüngsstrom referred to, in which vehicle bodies 4 are painted after they were in the paint booth 2 upstream, not specifically shown pretreatment stations, for example, cleaned and degreased.
  • the painting booth 2 comprises a painting tunnel 6 arranged at the top, which vertical side walls 8a, 8b and a horizontal cabin ceiling 10 limited, but is open at the ends and downwards in such a way that laden with overspray cabin exhaust air can flow down.
  • the cabin ceiling 10 is formed in the usual way as the lower boundary of the air supply space (not shown) with filter cover.
  • a steel structure 14 is arranged, which carries a known per se conveyor system 16, which will be discussed in detail here night.
  • this vehicle body 4 to be painted can be transported from the input side of the painting tunnel 6 to its output side.
  • application devices Inside the paint tunnel 6 are not specifically shown application devices, by means of which the vehicle bodies 4 can be applied in a manner known per se with paint.
  • the separation chamber 18 is characterized by an in FIG. 2 to be recognized bottom plate 20, two vertical side walls 22a, 22b and two vertical end walls bounded, the latter two in the FIGS. 1 and 2 are omitted.
  • a separation device 24 is arranged with a plurality of in the longitudinal direction of the separation chamber 18 successively arranged separation units 26, which will be discussed in more detail below.
  • the separation units 26 rest on a support frame 30 which allows air to flow downwardly out of the separation device 24.
  • a further air guide plate 32 which extends along the separation device 24 in the separation chamber 18.
  • the air guide plate 32 has a vertical portion 32 a, which in the FIGS. 1 and 2 left side wall 22a of the separation chamber 18 faces, and an obliquely downward in the direction of the opposite side wall 22b of the separation chamber 18 extending portion 32b.
  • FIG. 1 schematically illustrated collecting channel 34 which extends parallel to the vertical portion 32a of the air baffle 32 and which is inclined in the longitudinal direction relative to a horizontal plane.
  • a deposition unit 26 includes two spaced-apart parallel rectangular side panels 36a, 36b, which are connected at their upper opposite end edges by a curved portion 38 with each other, whose clear outer contour corresponds in cross-section to a semicircle and the top of the separation unit 26 forms.
  • the side plates 36a, 36b each carry a gutter 44a, 44b, which runs parallel to the side plates 36a, 36b of the separation units 26 and in the direction of a first, in FIG. 3 front end 46 of the separation unit 26 is inclined downwards.
  • the gutters 44a, 44b terminate at the end with the side plates 36a, 36b of the separating unit 26 (cf. FIG. 3 ).
  • the gutters 44a, 44b are at their end 48a and 48b at the first end face 46 (see. FIG. 3 ) of the separation unit 26 open.
  • each separation unit 26 comprises a first end wall 50a, which is arranged on the first end face 46.
  • the opposite end face of the separation units 26, which is not specifically provided with a reference numeral, is covered by a second end wall 50b.
  • the end walls 50a, 50b of the Abscheidiseren 26 close the end faces of the associated overflow channel 40.
  • the two end walls 50a, 50b are made of plastic.
  • the first end wall 50a of the separation unit 26 comprises two openings 52a, 52b, in each of which a gutter 44a, 44b with their. Ends 48a, 48b opens.
  • drip plates 54a, 54b are attached to the openings 52a, 52b.
  • the drip plates 54a, 54b of each separation unit 26 protrude beyond the collection channel 34.
  • two adjacent separation units 26 are arranged in each case while maintaining a distance from each other.
  • An electrode device 56 extends in each case between two adjacent separation units 26 and at the free side plates 36a and 36b of the two outermost separation units 26 within the separation device 24.
  • Each electrode device 56 comprises two straight, parallel to each other electrode strips 58a, 58b. These hold in a field portion 60 of the electrode device 56, a planar electrode 62, in the example in the form of a grid electrode whose edges 64a, 64b extending between the electrode strips 58a, 58b are perpendicular to this.
  • a corona section 66 of the electrode device 56 the electrode strips 58a, 58b hold a plurality of corona wires 68 acting as a spray electrode.
  • the corona wires 68 extend in a plane predetermined by the electrode strips 58a, 58b parallel to the edges 64a, 64b of the grid electrode 62 and are equidistant from one another arranged.
  • the electrode means 56 have an overall extension which substantially corresponds to the extension of the side plates 36a, 36b of the separation units 26.
  • the electrode means 56 are arranged so that the lower edge 64b of the grid electrode 62 is located approximately at the level of the lower end of the side plates 36a and 36b, respectively.
  • this separating liquid is supplied to the overflow channel 40 in the curved section 38 of the separating units 26. From there, the separating liquid reaches the side plates 36a, 36b via the curved flanks 70a, 70b of the curved section 38 of the separating unit 26 extending next to the overflow channel 40 as a continuous layer and flows down at their separating surfaces 42a, 42b as a further continuous separating liquid layer.
  • corona wires 68 of the electrode device 56 and their distance from one another may vary depending on the deposition behavior of the overspray particles.
  • four corona wires 68 are provided, of which the uppermost one is arranged next to the curved section 38 of the separating unit 26, whereas the underlying corona wire 68 is still in the area adjacent to the respective side plate 36a or 36b of the separating unit 26.
  • the four corona wires 68 are divided into two groups 68A, 68B. They are in each case electrically connected in parallel within these groups 68A, 68B and thus form a "region" 56A or 56B of the electrode device 56. Each of these regions 56A, 56B is connectable to a high-voltage source 74 via a suitable peeling device, for example via high-voltage contactors. The switching device and the high voltage source are not shown in the drawing for this embodiment.
  • the planar grid electrode 62 is also acted upon by its own high-voltage source 74.
  • the various areas 56A, 56B and 56C of the electrode device 56 are subjected to cyclic high voltage, for example in such a way that first the uppermost area 56A, then the area 56B and on this in turn followed by the grid electrode realized area 56C with the respective High voltage source 74 is connected.
  • cyclic high voltage for example in such a way that first the uppermost area 56A, then the area 56B and on this in turn followed by the grid electrode realized area 56C with the respective High voltage source 74 is connected.
  • this cyclic application of high voltage is sufficient; However, this is associated with an energy saving over a continuous load.
  • the risk is reduced that overspray particles already deposit in the region of the separation units 26 opposite the corona wires 68, where this is less desirable.
  • FIG. 5 are as a second embodiment, a modified deposition unit 126 and a modified electrode means 156 and in FIG. 6 a this comprehensive modified separation device 124 is shown.
  • Components of the deposition unit 126, the electrode device 156 and the separation device 124, which correspond to those of the separation unit 26, the electrode device 56 and the separation device 24 according to FIGS FIGS. 1 to 4 are denoted by the same reference numerals plus 100.
  • the separation unit 126 differs from the separation unit 26, inter alia, in that the drainage channels 144a, 144b project beyond the end face 146 of the separation unit 126.
  • the projecting portions 172a, 172b correspond to the above-discussed drip plates 54a, 54b, which can therefore be dispensed with in the separating device 124.
  • the projecting portions 172a, 172b of the drainage channels 144a, 144b of the separating unit 126 extend through the respective openings 152a, 152b in each end wall 150a of the separating device 124.
  • one of a plurality of high voltage sources 174 is shown disposed between the side plates 136a, 136b of each deposition unit 126 and each connected to one of the regions 156A, 156B, 156C of the electrode device 156.
  • high-voltage sources 174 can also be present in each deposition unit 26 according to the first exemplary embodiment.
  • a single separation unit 126 and a single electrode device 156 thus form a separation module 176.
  • a single separation unit 26 and a single electrode device 56 form after the FIGS. 1 to 4 a separation module 76.
  • FIG. 5 are also struts 178a, 178b; 178c, which interconnect the inner surfaces of the two side plates 136a, 136b of the separating unit 126 at the bottom, in the middle and at the top.
  • a protective bar 180 perpendicular to the electrode strips 158a, 158b, above the uppermost corona wire 168, is a protective bar 180, which reduces the risk of contact with objects or particles falling off the painting tunnel 6 on the electrode device 156 with the coromad wires 168 becomes.
  • the electrode device 56 and the separation device 24 applies correspondingly to the separation unit 126, the electrode device 156 and the separation device 124.
  • Corona discharges occur at the corona wires 68 in a manner known per se, by means of which the overspray particles are effectively ionized in the exhaust air flowing past the booth.
  • the ionized overspray particles pass the ground potential side plates 36a, 36b of two adjacent deposition units 26 and the intervening grid electrode 62. Due to the electric field formed between the grid electrode 62 and side plates 32a, 32b, the ionized overspray particles separate at the deposition surfaces 42a, 42b of the deposition units 26 and are there taken up by the separating liquid flowing along it.
  • the ionized overspray particles are already deposited in the area of the corona wires 68 at the separation units 26.
  • the electric field present between the corona wires 68 and the respective side plate 36a, 36b of the deposition unit 26 is more inhomogeneous than the electric field in the region of the grid electrode 62, thus causing more judicious and effective deposition of the ionized overspray particles at the corresponding deposition unit 26.
  • the cleaned in the passage between the separation units 26 air is from the lower air guide plate 32 in the direction of the in the FIGS. 1 and 2 shown side wall 22b of the separation chamber 18 directed from where it, optionally after a certain conditioning, the paint tunnel 6 can be supplied again as fresh air.
  • the conditioning may in particular be a readjustment of the temperature, the humidity and optionally, for removal of still-in-air solvents.
  • the deposition liquid flowing down the separation units 26 and now loaded with the overspray particles passes down into the gutters 44a, 44b of the separation units 26.
  • the slope of the drainage channels 44a, 44b causes the laden separation liquid to flow in the direction of the openings 52a, 52b in the respective end walls 50a through the collecting trough 34, the precipitating liquid laden with overspray particles flows out of the painting booth 2 and can be cleaned and reprocessed, in which the separating liquid is freed from the overspray particles, or disposal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
EP09777847.6A 2008-09-04 2009-08-13 Vorrichtung zum abscheiden von lack-overspray Not-in-force EP2321066B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008046411A DE102008046411A1 (de) 2008-09-04 2008-09-04 Vorrichtung zum Abscheiden von Lack-Overspray
PCT/EP2009/005864 WO2010025811A1 (de) 2008-09-04 2009-08-13 Vorrichtung zum abscheiden von lack-overspray

Publications (2)

Publication Number Publication Date
EP2321066A1 EP2321066A1 (de) 2011-05-18
EP2321066B1 true EP2321066B1 (de) 2015-07-08

Family

ID=41258871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777847.6A Not-in-force EP2321066B1 (de) 2008-09-04 2009-08-13 Vorrichtung zum abscheiden von lack-overspray

Country Status (12)

Country Link
US (1) US20110146569A1 (es)
EP (1) EP2321066B1 (es)
JP (1) JP5788797B2 (es)
CN (1) CN102143806B (es)
BR (1) BRPI0918074B1 (es)
CA (1) CA2736793C (es)
DE (1) DE102008046411A1 (es)
MX (1) MX340702B (es)
RU (1) RU2512333C2 (es)
UA (1) UA101215C2 (es)
WO (1) WO2010025811A1 (es)
ZA (1) ZA201101011B (es)

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DE102010031556A1 (de) * 2010-07-20 2012-01-26 Voith Patent Gmbh Vorhangauftragswerk
US20170354980A1 (en) 2016-06-14 2017-12-14 Pacific Air Filtration Holdings, LLC Collecting electrode
US10882053B2 (en) 2016-06-14 2021-01-05 Agentis Air Llc Electrostatic air filter
US10828646B2 (en) 2016-07-18 2020-11-10 Agentis Air Llc Electrostatic air filter
US10792673B2 (en) 2018-12-13 2020-10-06 Agentis Air Llc Electrostatic air cleaner
US10875034B2 (en) 2018-12-13 2020-12-29 Agentis Air Llc Electrostatic precipitator

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Also Published As

Publication number Publication date
US20110146569A1 (en) 2011-06-23
CN102143806B (zh) 2015-03-11
RU2512333C2 (ru) 2014-04-10
EP2321066A1 (de) 2011-05-18
CA2736793C (en) 2016-06-28
CA2736793A1 (en) 2010-03-11
MX340702B (es) 2016-07-22
JP5788797B2 (ja) 2015-10-07
BRPI0918074A2 (pt) 2015-12-01
UA101215C2 (uk) 2013-03-11
MX2011002387A (es) 2011-05-30
CN102143806A (zh) 2011-08-03
ZA201101011B (en) 2011-10-26
DE102008046411A1 (de) 2010-03-11
BRPI0918074B1 (pt) 2019-04-16
JP2012501819A (ja) 2012-01-26
WO2010025811A1 (de) 2010-03-11
RU2011112448A (ru) 2012-10-10

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