DK156939B - FILTER FOR A POWDER SPRAY PAINTING SYSTEM - Google Patents
FILTER FOR A POWDER SPRAY PAINTING SYSTEM Download PDFInfo
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- DK156939B DK156939B DK226587A DK226587A DK156939B DK 156939 B DK156939 B DK 156939B DK 226587 A DK226587 A DK 226587A DK 226587 A DK226587 A DK 226587A DK 156939 B DK156939 B DK 156939B
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- Denmark
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- air
- water
- powder
- filter
- housing
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Classifications
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- 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
- B05B14/46—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by washing the air charged with excess material
- B05B14/465—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by washing the air charged with excess material using substantially vertical liquid curtains or wetted walls behind the object to be sprayed
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- 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
- B05B14/46—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by washing the air charged with excess material
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- 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
- B05B14/48—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths specially adapted for particulate material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Separation Of Particles Using Liquids (AREA)
Description
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Opfindelsen angâr et efterfilter til et pulverspr0jte-maleanlæg, og som omfatter et lukket filterhus, som til-f0res den pulverfyldte luft gennem en tilgangskanal og fraf0res den filtrerede luft gennem en afgangskanal, og 5 som omfatter et nederst i huset indrettet vandbassin og ledeorganer til under pâvirkning af den gennem filterhu-set str0mmende luft at f0re vand fra vandbassinet op til et omràde 0verst i kabinen og herfra ned i bassinet igen.BACKGROUND OF THE INVENTION The present invention relates to a post-filter for a powder spray painting system, which comprises a closed filter housing which is fed to the powder-filled air through an inlet duct and the filtered air is discharged through an outlet duct, and comprising a water basin influencing the air flowing through the filter housing to bring water from the water basin up to an area at the top of the cabin and from there into the basin again.
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Maling med t0rt pulver frembyder mange kvalitets- og milj0mæssige fordele i forhold til de processer, hvor malingen bæres af et opl0sningsmiddel. Det anvendte pulver har en nærmest st0vagtig karakter, og det kræves 15 derfor, at der fra den anvendte spr0jtekabine afsuges en luftmængde, som er tilstraekkelig stor til i kabinens frontâbning og andre âbninger at holde en lufthastighed pâ mindst 0.5 m/sekund for herved at hindre, at pulver trænger ud af kabinen til gene for operat0ren og andre 20 personer, som mâtte opholde sig i kabinens nærhed.Dry powder paint offers many quality and environmental advantages over the processes where the paint is carried by a solvent. The powder used has an almost dusty character, and it is therefore required that the amount of air used be extracted from the spray booth sufficiently large to maintain an air velocity of at least 0.5 m / second in the front of the cabin and other openings. that powder penetrates out of the cabin to the detriment of the operator and other 20 persons who may be in the vicinity of the cabin.
Den afsugede luft medf0rer naturligvis overskydende pul- ........ver, som.mâ frafiltreres, f0r luften kan afkastes til det fri. Langt st0rsteparten af dette pulver (typisk 25 97%) fjernes nemt ved hjælp af f.eks. en enkel cyklon, men tilbage bliver en lille rest, som mâ fjernes i et efterfilter. Ved de kendte filteranlæg af denne art fin-der denne efterfiltrering sted, ved at luften passerer et filtermateriale i form af f.eks. én eller flere poser 30 eller patroner, som tilbageholder pulveret. Hvis filter-materialet skal være i stand hertil, mâ det selvsagt væ-re meget fint, hvorfor der kun tillades en beskeden lufthastighed over filteret. Da der til gengæld er taie om store luftvoluminer, som skal filtreres, kræves der 35 meget store filterarealer og heraf f0lgende kostbare in-vesteringer i filteranlæg, samt i filtermateriale, somThe extracted air naturally causes excess powder, which must be filtered out before the air can be released into the open air. The vast majority of this powder (typically 25 97%) is easily removed by e.g. a simple cyclone but remains a small residue that must be removed in an after filter. In the known filter systems of this kind, this post-filtration takes place by passing through the air a filter material in the form of e.g. one or more bags 30 or cartridges holding the powder. Of course, if the filter material is to be capable of this, it must be very fine, which is why only a modest air velocity is allowed above the filter. However, since there is a lot of large volumes of air to be filtered, 35 very large filter areas and the consequent costly investments in filter systems, as well as in filter material, are required.
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2 desuden jævnligt mâ fornyes som f0lge af materialets be-grænsede levetid. Hertil kommer, at sâdanne filtre alli-gevel ikke kan tilbageholde pulveret tilfredsstillende, og at det i sig selv er vanskeligt at fjerne det udskil-5 te pulver fra filteret, uden herved at komme til at hvirvle pulveret op, si det breder sig som en st0vsky ud til omgivelserne.2 also must be renewed regularly as a result of the limited life of the material. In addition, such filters can not withstand the powder satisfactorily and that it is difficult in itself to remove the separated powder from the filter without having to swirl the powder as it spreads like a dust out to the surroundings.
Det er formâlet med opfindelsen at anvise et efterfilter 10 af den indledningsvis nævnte art, som er billigere at fremstille og har mindre driftomkostninger end hidtil kendt, kan udskille pulveret næsten 100% og tillader det udskilte pulver at blive fjernet fra filteret uden nogen form for st0vgener.SUMMARY OF THE INVENTION It is an object of the invention to provide an after-filter 10 of the kind mentioned above, which is cheaper to manufacture and has less operating costs than hitherto known, can excrete the powder almost 100% and allows the separated powder to be removed from the filter without any dust nuisance .
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Dette opnâs, idet efterfilteret if0lge opfindelsen er ejendommeligt ved, at ledeorganerne omfatter et f0rste-, andet- og tredie ledeorgan, der er sâledes indrettet, at pulveret bindes af vandet under luftens passage af hvert 20 af disse, hvorefter vandet frasepareres luften under dennes passsage af et fjerde ledeorgan, og at det f0rste ledeorgan bestâr af en i hovedsagen vertikalt anbragt væg, som fortrinsvis strækker sig i hele husets bredde, og som foroven har et som vandlâs indrettet overl0b og 25 forneden ender et passende stykker over vandoverfladen.This is achieved as the after-filter according to the invention is characterized in that the guide means comprise a first, second and third guide means, which are arranged so that the powder is bonded by the water during the passage of air of each of them, after which the water is separated from the air during its passage. of a fourth guide member, and that the first guide member consists of a generally vertically arranged wall, which preferably extends throughout the entire width of the housing, and which has a water-level overflow at the top and ends below a suitable piece above the water surface.
Dette medf0rer, at driftomkostningerne bliver meget smâ, da det tidligere anvendte kostbare filtermateriale er erstattet af vand, som samtidigt holder det udskilte pulver bundet, sâ det kan fjernes fra filteret uden at 30 st0ve. Da det fine pulvers adhærensevne med vand er meget stor, og da bindingen finder sted i tre pâ hinanden f0lgende procestrin, opnâs desuden en hidtil ukendt ud-skillelsesgrad af pulveret.This means that the operating costs will be very small, as the previously used expensive filter material is replaced by water, which at the same time keeps the separated powder bound, so that it can be removed from the filter without dusting. Furthermore, since the adherence of the fine powder with water is very high and as the bonding takes place in three consecutive process steps, a new degree of separation of the powder is obtained.
35 If0lge opfindelsen kan det fjerde ledeorgan bestâ af en eller flere kanaler, som strækker sig i det væsentlige 3According to the invention, the fourth guide means may consist of one or more channels which extend substantially 3.
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horisontalt fra det tredie til det f0rste ledeorgan, og som i sin luftudgang har mindst én afslagningsrist med ét i indbyrdes afstand sâledes anbragt antal prelplader, at luften i hvert fald én gang under passage af risten 5 tvinges til brat at ændre retning. Herved opnâs en sær-lig enkel og effektiv konstruktion, hvor filterets afslagningsrist indgâr som en integreret del af det fjerde ledeorgan.horizontally from the third to the first guide member, and which in its air outlet has at least one cut-off grate with one spaced-apart number of baffles that at least once during passage of the grate 5 is forced to change direction abruptly. This results in a particularly simple and effective construction, in which the filter grating element forms an integral part of the fourth guide member.
10 Luftpassagerne gennem filterhuset kan desuden if0lge op-findelsen være sâledes dimensionerede, at nâr lufthas-tigheden i tilgangskanalen er 10-30 m/sekund, forl0ber str0mningen laminart mellem filterhusets forvæg og skil-levæggen og turbulent mellem dennes nedre kant og vand-15 overfladen, samt i ledekanalerne. Til at begynde med str0mmer luften herved roligt og langsomt gennem filterhuset, sâledes at pulveret fâr tid til at binde sig til vandet, som l0ber ned af skillevæggen og til den foran denne liggende vandoverflade. Som f0lge af den laminare 20 str0mning sættes vandet i dette afsnit af vandbassinet desuden i ait væsentligt ikke i bevægelse, sâledes at pulveret kan bundfælde sig og senere fjernes efter be-. hov. Den fra skillevæggens nedre kant begyndende turbulente str0mning river derimod vand med sig fra dette af-25 snit af vandbassinet og f0rer vandet med sig op gennem ledekanalerne, hvor det som f0lge af turbulensen effek-tivt vasker de sidste pulverrester ud af luften.In addition, according to the invention, the air passages through the filter housing can be so dimensioned that when the air velocity in the inlet duct is 10-30 m / second, the flow runs laminar between the filter housing front wall and the partition wall and turbulent between its lower edge and the water surface. , as well as in the lead channels. Initially, the air thereby flows slowly and slowly through the filter housing, so that the powder has time to bind to the water running down the partition wall and to the water surface in front of it. In addition, as a result of the laminar flow, the water in this section of the water basin is not substantially moved, so that the powder can settle and subsequently be removed after application. Oops. The turbulent flow starting from the lower edge of the partition, on the other hand, draws water from this section of the water basin and carries the water with it up through the conduits, where as a result of the turbulence it effectively washes the last powder residues out of the air.
Yderligere kan der if0lge opfindelsen i luftpassagen 30 mellem filterhusets forvæg og skillevæggen være indskudt en perforeret fordelerplade, som danner en vinkel med skillevæggen pâ mellem 10 og 50°, fortrinsvis mellem 20 og 40°, og fordelerpladens perforeringsgrad kan være mellem 20 og 40%, fortrinsvis mellem 25 og 35%, mens de 35 perforerede huiler kan hâve en diameter pâ mellem 3 og 15 mm, fortrinsvis mellem 5 og 10 mm. Herved opnâs enFurther, according to the invention in the air passage 30, between the front wall of the filter housing and the partition wall, a perforated distributor plate can be inserted which forms an angle with the partition wall between 10 and 50 °, preferably between 20 and 40 °, and the perforation degree of the distributor plate can be between 20 and 40%. preferably between 25 and 35%, while the 35 perforated cavities may have a diameter of between 3 and 15 mm, preferably between 5 and 10 mm. Hereby, and
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4 jævn fordeling af luftstr0mmen over skillevæggen og her-med en forbedring af udskillelsesgraden i dette afsnit.4 evenly distributes the air flow over the partition and thereby an improvement in the separation rate in this section.
Opfindelsen forklares nedenfor under henvisning til teg-5 ningen, hvor fig. 1 viser skematisk et pulver-spr0jtemaleanlæg set fra siden delvis i snit, 10 fig. 2 i st0rre mâlestok et snit gennem en udf0relses-form for et efterfilter if0lge opfindelsen.The invention is explained below with reference to the drawing, in which fig. 1 schematically shows a side-view of a powder spray painting system, partially in section; FIG. 2 on a larger scale, a section through an embodiment of an after filter according to the invention.
Fig. 1 viser et pulverspr0jteanlæg, som anvender et efterfilter if0lge opfindelsen, dette filter er i sin hel-15 hed angivet med henvisningstallet 1. I en spr0jtekabine, som i sin helhed er angivet med henvisningstallet 2, er et emne 3, der skal males, ophængt i en conveyor 10. Ma-lingen finder sted, idet en sky af elektrostatisk ladet pulver 7 spr0jtes ud af en elektrostatisk spr0jte 5, som 20 er pâtrykt en spænding, der er antydet med henvisningstallet 7. Pulveret tilf0res spr0jten 5 via en pulverled-ning 8, som er forbundet med en f0debeholder 9, som in-deholder en ikke vist pulverpumpe til at pumpe pulveret gennem pulverledningen 8. Emnet 3 tiltrækker som f0lge 25 af spændingsforskellen pulveret og pâf0res herved et passende pulverlag, som senere sintres, idet emnet f0res gennem en ikke vist lakovn. For at hindre, at pulver trænger ud gennem âbninger i kabinen, afsuges der fra denne luft ved hjælp af en ikke vist udsugningsventila-30 tor, som er tilkoblet det samlede anlæg efter filteret 1. Luften f0res, som vist med pilëne, f0rst gennem en udsugningskanal 11 til en cyklon 14, hvor ca. 97% af pulveret bliver udskilt. Det udskilte pulver l0ber ned i f0debeholderen 9 via en sigte 15, som tjener til at 35 fjerne eller finfordele éventuelle klumper i pulveret.FIG. 1 shows a powder spray system using an after filter according to the invention, this filter is indicated in its entirety by reference numeral 1. In a spray booth, which is indicated in its entirety by reference numeral 2, a workpiece 3 to be painted is suspended. in a conveyor 10. The measurement takes place when a cloud of electrostatically charged powder 7 is sprayed out of an electrostatic syringe 5, which 20 is applied to a voltage indicated by reference numeral 7. The powder is supplied to the syringe 5 via a powder line. 8, which is connected to a feed container 9, which contains a powder pump (not shown) for pumping the powder through the powder line 8. As a result 25 of the voltage difference, the blank 3 attracts the powder and thereby applies a suitable powder layer which is later sintered as the blank is passed through. a lacquer oven not shown. In order to prevent powder from penetrating through openings in the cabin, this air is sucked off by means of a suction fan not shown, which is connected to the entire system after the filter 1. The air is, as shown by the arrows, first passed through a suction duct 11 for a cyclone 14 where approx. 97% of the powder is excreted. The separated powder runs into the feed container 9 via a sieve 15 which serves to remove or atomize any lumps in the powder.
Pulveret kan dernæst anvendes pâny, som ovenfor beskre- 5The powder can then be used as described above
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vet. Dernæst f0res luften videre gennem en tilgangskanal 12 ind i efterfilteret 1, hvor luften filtreres, og dernæst slutteligt afkastes til f.eks. det fri via en af-gangskanal 13.Vet. Next, the air is passed through an inlet duct 12 into the after filter 1, where the air is filtered and then finally discharged to e.g. it freely via an exit channel 13.
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Ved et typisk mellemstort sprpjtemaleanlag af denne art afsuges der ca. 7000 m3 luft pr. time fra kabinen med en lufthastighed pâ ca. 25 m/sekund i kanalerne. Luften medf0rer op til 10 g pulver pr. m3 luft, eller 70 kg 10 pulver pr. time, hvoraf der udskilles 97% eller ca. 68 kg pulver pr. time i cyklonen. Luften medf0rer derfor efter cyklonen stadigvæk ca. 2 kg pulver pr. time, og denne pulvermængde kan naturligvis ikke kastes ud i om-givelserne og mâ derfor fjernes i efterfilteret. Da det 15 netop er de aller fineste bestanddele af pulveret, som bliver tilbage i luften efter cyklonen, er dette pulver særligt vanskeligt at udskille tilfredsstillende ved hjælp af de konventionelle filtermaterialer.In a typical medium-sized spray painting system of this kind, approx. 7000 m3 of air per hour from the cabin with an airspeed of approx. 25 m / second in the channels. The air carries up to 10 g of powder per day. m3 air, or 70 kg 10 powder per hour, of which 97% or approx. 68 kg powder per hour in the cyclone. Therefore, after the cyclone, the air still carries approx. 2 kg powder per This amount of powder cannot, of course, be thrown into the environment and must therefore be removed in the after-filter. Since it is precisely the very finest constituents of the powder remaining in the air after the cyclone, this powder is particularly difficult to separate satisfactorily by means of the conventional filter materials.
20 Ovennævnte problem er imidlertid l0st ved, at anvende det i fig. 2 viste efterfilter 1, hvor de konventionelle filtermaterialer er erstattet af vand 17, som danner et bassin i bunden af et filterhus 16. Ved den viste udf0-relsesform tilf0res den pulverfyldte luft foroven i fil-25 terhuset 1 gennem tilgangskanalen 12 og forlader atter i renset tilstand dette hus gennem afgangskanalen 13. Luften str0mmer gennem filterhuset pâ den med de viste pile angivne màde, hvorved pulveret udskilles, som det nærme-re vil blive beskrevet i det f0lgende.However, the above problem is solved by using the one shown in FIG. 2, the conventional filter materials are replaced by water 17 which forms a basin at the bottom of a filter housing 16. In the embodiment shown, the powder-filled air is fed into the top of filter housing 1 through the inlet duct 12 and leaves again in purified state this housing through the outlet duct 13. The air flows through the filter housing in the manner indicated by the arrows, thereby separating the powder, as will be described in the following.
30 I huset 16 er der anbragt en skillevæg 18, som strækker sig i hele husets bredde, og som foroven har et som vandlâs indrettet overl0b 19. Skillevæggen 18's nederste ende 20 ligger et passende stykke over vandet 17's over-35 flade. Ved filterhusets bagvæg 21 er der indrettet en eller flere lodrette ledekanaler 23, som strækker sig 630 In the housing 16 is provided a partition 18 which extends throughout the width of the housing and which has an overflow arranged at the top of the water 19. The lower end 20 of the partition 18 lies a suitable distance above the surface of the water 17. At the back wall 21 of the filter housing one or more vertical guide channels 23 extending 6 are arranged
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fra et stykke over vandbassinet 17's overflade og op til én eller flere vandrette ledekanaler 24, som er forbun-det med overl0bet 19. Ved udgangen, set i str0mretnin-gen, har hver af disse vandrette ledekanaler 24 en af-5 slagningsrist 25. Denne bestâr af et antal prelplader 26, der er siksakformede og er anbragt i indbyrdes af-stand med en passende stor hældningsvinkel i forhold til luftens str0mningsretning.from a distance above the surface of the water basin 17 and up to one or more horizontal guide channels 24, which are connected to the overflow 19. At the exit, seen in the flow direction, each of these horizontal guide channels 24 has a knock-off grate 25. This consists of a plurality of baffle plates 26 which are zigzag-shaped and spaced apart at a suitably large angle of inclination with respect to the direction of flow of the air.
10 Luften str0mmer fra tilgangskanalen 12 ind i filterhuset 16 med en hastighed pâ mellem 10-30 m/sekund, luftstr0m-men er ved disse hastigheder turbulent. Mellem filterhu-sets forvæg 22 og skillevæggen 18 findes der imidlertid en sâ stor afstand, at lufthastigheden i dette omràde 15 sænkes til ca. 0.5 m/sekund, hvorved luftstr0mmen kommer til at forl0be laminart. Passagen mellem skillevæggen 18's nedre kant 20 og vandet 17, samt i ledekanalerne 23, 24 er imidlertid sâ lille, at luftstr0mmen i dette afsnit atter bliver turbulent.10 The air flows from the inlet duct 12 into the filter housing 16 at a speed of between 10-30 m / second, the air flow being turbulent at these speeds. However, between the filter housing front wall 22 and the partition wall 18, there is such a large distance that the air velocity in this area 15 is lowered to approx. 0.5 m / second, whereby the airflow will run laminar. However, the passage between the lower edge 20 of the partition wall 18 and the water 17, as well as in the ducting channels 23, 24, is so small that the air flow in this section again becomes turbulent.
20 I luftpassagen mellem filterhusets forvæg 22 og skillevæggen 18 er der indskudt en perforeret fordelerplade 27, som danner en vinkel med skillevæggen pâ mellem 10 og 50°, fortrinsvis mellem 20 og 40°. Denne fordelerpla- 25 de 27 har et antal gennemstr0mningshuller 28, som er jævnt fordelt over perforeringspladen. Perforerings-graden er mellem 20 og 40%, fortrinsvis mellem 25 og 35%, og de perforerede huiler har en diameter pâ mellem 3 og 15 mm, fortrinsvis mellem 5 og 10 mm.20 A perforated distributor plate 27 is inserted in the air passage between the filter housing front wall 22 and the partition wall 18, which forms an angle with the partition wall between 10 and 50 °, preferably between 20 and 40 °. This distributor plate 27 has a number of flow holes 28 which are evenly distributed over the perforation plate. The degree of perforation is between 20 and 40%, preferably between 25 and 35%, and the perforated cavities have a diameter of between 3 and 15 mm, preferably between 5 and 10 mm.
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Efterfilteret fungerer pâ f0lgende mâde. Luften, som str0mmer ind i filterhuset 16 gennem tilgangskanalen 12, rammer f0rst fordelerpladen 27, som fordeler luften over hele sit areal og retter den skrât over mod skillevæggen 35 18 med en stærkt nedsat hastighed, der ligger i det la- minare omrâde. Mellem skillevæggen 18's nedre kant 20 og 7The after filter works as follows. The air flowing into the filter housing 16 through the inlet duct 12 first hits the distributor plate 27, which distributes the air over its entire area and directs it obliquely to the partition wall 35 18 at a greatly reduced rate, which is in the linear range. Between the lower edge 20 and 7 of the partition 18
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bassinet 17 sættes lufthastigheden atter op i det turbulente omrâde, hvorved der rives vand med op i ledekana-lerne 23, 24, hvor str0mningen ligeledes forl0ber turbulent, som antydet med pilene. Luften str0mmer dernæst 5 videre gennem afslagningsristen 24, hvor luften m0der de i forhold til str0mretningen skràt stillede siksakforme-de prelplader 26. Som f0lge af de bratte hastighedsæn-dringer under denne passage udskilles vandet nu fra luften, som str0mmer videre - eventuelt via en yderligere 10 afslagningsrist 29 - ind i afgangskanalen 13, hvorfra den nu rene luft afkastes til det fri. Det udskilte vand l0ber gennem et antal dykr0r 30 ned i overl0bet 19. Dette har en overl0bskant 31, som vender mod skillevæggen 18, og som ligger h0jere end dykr0rene 30's underkant 15 32. Der dannes herved en vandlâs, som hindrer, at luften pâ dette sted trænger om bag skillevæggen 18. Vandet 10-ber dernæst ned over skillevæggen 18 pâ dennes yderside, hvor vandet fortl0bende m0der den langs væggen langsomt str0mmende luft, hvis pulverindhold herved befugtes og 20 bindes af vandet. Slutteligt l0ber vandet pâny ned i vandbassinet, som pâ forsiden af skillevæggen 18 er i ait væsentligt stillestâende som f0lge af den lave luft-hastighed i dette omrâde. Pulveret aflejres derfor pâ bunden af filterhuset, hvorfra det efter behov let kan 25 fjernes uden herved at give anledning til nogen form for st0vgener, da pulveret nu befinder sig i en fugtig til-stand, hvor det ikke kan st0ve.In the basin 17, the air velocity is increased again in the turbulent area, whereby water is drawn up into the ducting channels 23, 24, where the flow also proceeds turbulently, as indicated by the arrows. The air then flows 5 further through the shut-off grate 24, where the air meets the zig-shaped baffle plates inclined in relation to the direction of flow. As a result of the steep speed changes during this passage, the water is now separated from the air which flows further - possibly via a further 10 off grating 29 - into the outlet duct 13, from which the now clean air is released into the open air. The separated water flows through a plurality of diving tubes 30 into the overflow 19. This has an overflow edge 31 facing the partition wall 18 which is higher than the bottom edge of the diving tubes 30 32. A water trap is thereby formed which prevents the air on this place penetrates behind the partition 18. The water 10 then descends over the partition 18 on its outside, where the water continuously meets the slowly flowing air along the wall, the powder content of which is moistened and bound by the water. Finally, the water runs down into the water basin, which at the front of the partition 18 is substantially stationary due to the low air velocity in this area. The powder is therefore deposited on the bottom of the filter housing, from which it can easily be removed as needed without giving rise to any kind of dust nuisance since the powder is now in a moist state where it cannot dust.
Som tidligere nævnt befugtes og blandes pulveret i tre 30 pâ hinanden f0lgende trin, idet der i hvert af disse trin bindes en bestemt procentdel af pulveret til vandet. Da den udskilte pulvermængde i hvert efterf0lgende trin er den procentuelle del af restmængden fra forrige trin, betyder det, at den totale udskillelsesgrad bliver 35 næsten 100%. I f0rste trin befugtes pulveret i luften, medens denne langsomt stryger hen over vandoverfladerneAs previously mentioned, the powder is wetted and blended in three successive steps, in each of these steps bonding a certain percentage of the powder to the water. Since the amount of powder separated in each subsequent step is the percentage of the residual amount from the previous stage, this means that the total degree of excretion becomes almost 100%. In the first step, the powder is wetted in the air while slowly ironing over the water surfaces
DK 156939 BDK 156939 B
8 pâ skillevæggen 18 og pâ den del af bassinet 17's over-flade, der ligger til venstre for skillevæggens nedre kant 20. X næste trin befugtes pulveret mellem denne kant og den lodrette ledekanal 23, idet den nu kraftigt 5 turbulente luftstr0m pisker vandoverfladen op i dette omrâde. I tredie trin udvaskes den nu meget lille pul-verrest under passagen af de lodrette ledekanaler 23, hvor der som f0lge af den kraftige turbulens finder en effektiv blanding sted af pulveret og det fra det andet 10 trin medrevne, delvis forst0vede vand.8 on the partition wall 18 and on the part of the surface of the basin 17 which lies to the left of the lower edge of the partition 20. X next step, the powder is wetted between this edge and the vertical guide channel 23, now whipping the strongly surface turbulent air stream into the water surface. this area. In the third step, the now very small powder residue is washed out during the passage of the vertical conduits 23 where, as a result of the severe turbulence, an effective mixing of the powder and the partially entrained water entrained by the second 10 steps takes place.
15 20 25 30 3515 20 25 30 35
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK226587A DK156939C (en) | 1987-05-04 | 1987-05-04 | FILTER FOR A POWDER SPRAY PAINTING SYSTEM |
| PCT/DK1988/000075 WO1988008755A1 (en) | 1987-05-04 | 1988-05-03 | After-filter for a powder paint spraying installation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK226587 | 1987-05-04 | ||
| DK226587A DK156939C (en) | 1987-05-04 | 1987-05-04 | FILTER FOR A POWDER SPRAY PAINTING SYSTEM |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| DK226587D0 DK226587D0 (en) | 1987-05-04 |
| DK226587A DK226587A (en) | 1988-11-05 |
| DK156939B true DK156939B (en) | 1989-10-23 |
| DK156939C DK156939C (en) | 1990-03-19 |
Family
ID=8111193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK226587A DK156939C (en) | 1987-05-04 | 1987-05-04 | FILTER FOR A POWDER SPRAY PAINTING SYSTEM |
Country Status (2)
| Country | Link |
|---|---|
| DK (1) | DK156939C (en) |
| WO (1) | WO1988008755A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008053178A1 (en) * | 2008-10-24 | 2010-05-12 | Dürr Systems GmbH | Coating device and associated coating method |
| CN103406217B (en) * | 2013-07-18 | 2016-08-17 | 吴江市黎里建兴铸件厂 | A kind of good antiscale property shower nozzle |
| CN104858091A (en) * | 2015-05-13 | 2015-08-26 | 吴伟枝 | Cyclone environment-friendly device |
| DE102016000390A1 (en) | 2016-01-14 | 2017-07-20 | Dürr Systems Ag | Perforated plate with increased hole spacing in one or both edge regions of a row of nozzles |
| DE102016000356A1 (en) | 2016-01-14 | 2017-07-20 | Dürr Systems Ag | Perforated plate with reduced diameter in one or both edge regions of a row of nozzles |
| CN111957485B (en) * | 2020-08-07 | 2021-11-23 | 浙江德易精密机械有限公司 | Quick coating equipment for shell and casing of three-phase motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH525022A (en) * | 1970-05-14 | 1972-07-15 | Technicair Sa | Process for purifying a gas stream laden with particles and device for carrying out this process |
| SE354202B (en) * | 1970-06-03 | 1973-03-05 | Greiff Svenska Maskin Ab | |
| GB1399805A (en) * | 1973-01-22 | 1975-07-02 | Carrier Drysys Ltd | Paint-spraying booths |
| DE2966539D1 (en) * | 1978-03-29 | 1984-02-23 | Morwood Holdings Pty Ltd | Spray booth |
| GB2081601A (en) * | 1980-08-08 | 1982-02-24 | Binks Bullows Ltd | Spraybooth |
-
1987
- 1987-05-04 DK DK226587A patent/DK156939C/en not_active IP Right Cessation
-
1988
- 1988-05-03 WO PCT/DK1988/000075 patent/WO1988008755A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK226587A (en) | 1988-11-05 |
| DK226587D0 (en) | 1987-05-04 |
| WO1988008755A1 (en) | 1988-11-17 |
| DK156939C (en) | 1990-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |