CN101209442A - Over-sprayed paint fog cleaning and recycling using in coating production - Google Patents
Over-sprayed paint fog cleaning and recycling using in coating production Download PDFInfo
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- CN101209442A CN101209442A CNA2007103003124A CN200710300312A CN101209442A CN 101209442 A CN101209442 A CN 101209442A CN A2007103003124 A CNA2007103003124 A CN A2007103003124A CN 200710300312 A CN200710300312 A CN 200710300312A CN 101209442 A CN101209442 A CN 101209442A
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Abstract
The invention relates to clearance of waste paint formed by over-sprayed paint fog remained on relevant parts of skids, working uniforms, trolleys, hangers, wall and ground gratings of spraying shops, etc. during the paint coating production process. The treatment process comprises that antipollution coating material with low surface is covered on protected parts and the surface is hard and untransferable so as to ensure that the low-surface antipollution coating is still effective after being cleared for a plurality of times; the clearance of over-sprayed paint fog of the protected parts; the over-sprayed paint fog removed from the protected parts is recycled.
Description
Invention field
The present invention relates to be used for the cleaning of the useless lacquer that over-sprayed paint fog that the application production process retains on associated components such as sled, frock, chassis, suspender and dope room wall, ground grid forms and the recirculation of over-sprayed paint fog uses.This processing procedure be included in be subject to be coated with on the object that over-sprayed paint fog pollutes be equipped with permanent protection, not cracky the low-surface-energy stain resistant coating and will remove over-sprayed paint fog and the recirculation using method of the over-sprayed paint fog disposed from the parts that scribble stain resistant coating.The characteristics that this method has is simple and easy to operate, energy-saving and environmental protection, pollution-free organic solid thing can recycle use.Be applicable to the processing of various sprays room over-sprayed paint fogs such as automobile, the vehicles, engineering equipment, furniture, electrical equipment.
Background technology
In application production processes such as automobile, the vehicles, engineering equipment, furniture, electrical equipment, on the associated components of sled, frock, chassis, suspender and dope room, the useless lacquer of a large amount of over-sprayed paint fogs formation is arranged as retention on wall, the ground grid.When spray gun is to the parts spraying, also inevitable injected the painting of these equipment.These useless lacquers are serious environment pollution on the one hand, and influence is produced and normally carried out on the other hand, produces a lot of consequences:
Alignment pin on a sled, the useless lacquer of adhering on locating hole and the support member make the location inaccurate, and the elevator device skids, and when streamline moves, causes stopping platform even falls car.
B produces a large amount of dirty points, becomes pollution sources, influences the component of coatings quality.
The useless lacquer that c dope room flase floor over-sprayed paint fog forms is many, and sticking pin easily slips during production, influences production safety.Useless lacquer too much can stop up the space between grid, influences ventilation effect.Because the too much coating cloud of accumulation is inflammable articles, also can become hidden fire-fighting danger.
More than all situations all need to be stopped in process of production or avoid.Therefore must be subject to object that over-sprayed paint fog pollutes to sled, suspender, frock, chassis, grid etc. does regular depainting and handles.The stripping method that uses has at present:
Burn
Ignition temperature is uncontrollable.The processed parts skewness that is heated very easily changes metal inside crystalline phase tissue, causes the object distortion, and mechanical properties such as the intensity of parts, toughness change simultaneously, influence the use of parts.Produce poisonous in a large number, harmful exhaust, directly enter atmosphere, serious environment pollution.Waste the huge energy.In today more and more higher to environmental protection requirement, the most original this method for cleaning is under an embargo substantially.
Chemical immersion
Chemicals with depainting function all has strong corrosivity, and the component corrosion after the processing is serious, causes parts surface to produce the loose tissue of one deck, produces dirty point when entering application, reduces the quality of vehicle body.Owing to corrode, shortened the service life of parts greatly.Because of chemicals has corrosivity and penetrating odor, give to store and transport and bring certain difficulty.When using these chemicals that parts are carried out depainting, very easily damage, security incident takes place to the operator.Soak cycle is longer, and is subjected to the restriction of depainting groove size, does not satisfy the processing demands of in enormous quantities and large component.Cost an arm and a leg, along with the increase of chemicals with the long-pending lacquer reaction time, paint removing effect also can be worse and worse, and the processing of raffinate quite bothers.Now, utilize spent lye instead of chemical product that parts are carried out the situation that boiling, spent lye are arbitrarily toppled in addition.
Blasting treatment
Sandblast is to utilize compressed air suction sand, makes the processed surface of its accelerating jetting to object, utilizes the hitting power scale removal of abrasive material.Its major defect has: operating personnel's labour intensity is big; The mixing jetting of compressed air and sand, a large amount of dust that produce in the work progress cause severe contamination to site environment, and noise is big, jeopardize operating personnel's health; Sand-blast material cost height, and have the problem of waste disposal.
Ultra-high pressure water fluid jet
Ultra-high pressure water fluid jet is that water is compressed to about 200 MPas, makes water pressurization accumulation of energy, and the water bundle penetration power that ejects is strong, energy density is big, reaches the purpose of scale removal when washing away object surface.Its major defect has: complicated parts can't thoroughly be cleared up, and the cleaning of angle, corner, limit is not in place; The useless lacquer that peels off from parts surface produces secondary pollution, relates to the problem of handling again; The high-pressure water jet apparatus expensive, price does not wait from hundreds of thousands to, 2,000,000, and maintenance cost is expensive especially.Shortcoming is that power consumption is high, needs power consumption tens kilowatt hours in 1 hour, and the hydraulic pressure height belongs to the high-risk industry, that operation has slightly is improper, promptly can cause human casualty accident, the noise height, and dust is big, and the parts after the processing also need be done antirust processing.
Fluidized bed processing
Utilize natural gas and air to light under given conditions, allow quartz sand in casting bed, be in a liquid state simultaneously and roll stirring, wherein parts burn and the scale removal that rubs need be used natural gas to immersing, electric power expends huge, the parts of handling need high pressure water washing to fall lime-ash, and then do antirust processing.Its defective be cost height, steel and iron parts often through high-temperature process, can damage be arranged to the intensity of steel and since over-sprayed paint fog all burn handle bigger to air pollution.
Another kind method is to spray a kind of water miscible water paint on parts in advance, behind parts accumulation over-sprayed paint fog, washes water paint and over-sprayed paint fog with water under high pressure.Shortcoming is inapplicable parts through the high temperature drying room, and coating also needs cleaning once to be coated with once.
After studying all cleaning courses, we find to coat in advance a kind of non-staining coating of low-surface-energy on parts such as spray room wall, ground grid, chassis, sled, anchor clamps, can be used for permanent guard block.Low surface energy coatings has very low surface energy.Its surface of common paint can be mostly greater than 30 dynes per centimeter.And the surface of low surface energy coatings can be less than 25 dynes per centimeter.So common paint, paint spraying are on low surface energy coatings, it is wetting to be difficult to reach physics.Again because the low peculiar surperficial resistance to bond of surface coating, viscosity not is difficult in common paint to adhere on the low surface energy coatings or adhere to not firm.Simultaneously, the material of low-surface-energy has many kinds, and for example, traditional paraffin, yellow sticking oil, silicone oil also are the low-surface-energy materials, but they all are thick liquid, do not do or easily migration, easily painting environment is polluted or potential safety hazard and can not using.
We use and withstand the resistance to bond or the non-viscosity of repeatedly cleaning and not losing stain resistant coating for the recirculation that guarantees over-sprayed paint fog, selected the hard and not transportable low surface coating of low-surface-energy of coating surface for use, the pure property of the over-sprayed paint fog pollutant under such coating has guaranteed to remove from its surface, promptly wherein do not contain the low-surface-energy material that migration is come, use to make it recycling as filler to guarantee that it can easily add in plastics, rubber, the coating.Simultaneously again because its surface of low surface energy coatings hard and can not animal migration, guaranteed that also resistance to bond that it is surperficial and non-viscosity can not decay or lose through clean cycle repeatedly.
Because low surface energy coatings has low surperficial resistance to bond and non-viscosity, we have selected for use and have been relatively easy to cleaning mode, such as, manual removal or mesolow water are removed (less than 40 MPas) and had both been reduced the equipment input, have reduced energy resource consumption again, and energy resource consumption is 3%～5% of a high-pressure water jet, improved cleaning efficiency, and, can not produce infringement to coating because hydraulic pressure is low relatively, guaranteed that low surface energy coat can prolonged and repeatedly use.The over-sprayed paint fog coating of peeling off is owing to be the form of peeling off, rather than the cut mode of traditional high-pressure water jet, strip down from the parts that scribble low surface energy coat, so be characterized in slabbing, and it is bigger, when it peels off, do not have dust and take place, and used water under high pressure is easy to filtering solids wherein, filters and just can recycle through simple strainer filtering, filter plate.
Can be used as the filler of plastics, rubber, coating etc. after over-sprayed paint fog drying after the filtration is pulverized, reached recirculation and used.In the application production process that we studied, in certain automobile factory application workshop, on average spray each vehicle body, we can regain 0.3 kilogram over-sprayed paint fog from sled and ground grid, and have obtained the recirculation use.Reduced whole environmental pollutions, and made the pollutant over-sprayed paint fog obtain the recirculation use.
Summary of the invention
An object of the present invention is easy method and handle spray room wall, chassis, sled, ground grid, the over-sprayed paint fog on the frock.
Another purpose is to recycle the over-sprayed paint fog of handling, and therefore, the present invention is a kind of a whole set of processing method that over-sprayed paint fog pollutes in the room of spraying, and comprising:
1) scribble the low-surface-energy stain resistant coating on protected parts, its surface is hard and not transferable, to guarantee that low-surface-energy antipollution coating is through repeatedly the cleaning circulation is still effective.
2) cleaning of protected parts over-sprayed paint fog.
3) over-sprayed paint fog under protected parts supernatant removes recycles.
Summary of the invention
The low surface energy coatings of required usefulness comprises following optional low-surface-energy component among the present invention: fluoropolymer resin, silicon-containing polymer resin, fluorine-containing surfactant, silicon-containing surfactant.
Fluoropolymer can be any polymer with fluorine functional group, and this polymer includes but not limited to: fluoroolefin, based on the polymer of vinylidene fluoride, inclined to one side trifluoro-ethylene, fluorovinyl ether, fluoropolymer can be pattern of fever or hot melt polymer.
The preferred fluoropolymer resin is polytetrafluoroethylene (PTFE), the poly-inclined to one side ethene of trifluoro, and described composition generally also comprises the combination of other acrylic compounds, alcohol acids epoxy phenolic polyester resin.Purpose is to improve the film forming and the adhesive force of fluoropolymer resin.Film-forming resin comprises polytetrafluoroethylene (PTFE), and an example that is specially adapted to commercially available polytetrafluoroethylene (PTFE) of the present invention is teflon (obtaining from E.I.Du Pont Company).
Silicon-containing polymer can be any polymer with functionalized silicon group.This polymer includes but not limited to methyl silicon resin, phenyl polysiloxane.Methyl phenyl silicone resin, trimethylsiloxy group silicic acid fat, vinyl polysiloxane, add-on type silicones, epoxide modified silicones, phenol aldehyde modified silicones, propylene modified silicone resin, alkyd modified silicones, polyester modification silicones, dimethyl silicone polymer, silicon rubber fluorine acyl resin.Described composition also comprises the combination of other acrylic compounds, alcohol acids, epoxies, polyesters, phenolic resinoid.Purpose is to improve the film forming and the adhesive force of silicon-containing polymer.
Fluorine-containing surfactant can be any compound of fluorine-containing functional group, and these compounds include but not limited to perfluorobutyric acid, perfluoro caprylic acid, fluorine-containing sodium alkyl sulfonate, fluorine-containing oxa-acid amides quaternary amine, perfluor acid glyceryl ester.
Silicon-containing surfactant can be any surfactant that comprises functionalized silicon group, and this polymer includes but not limited to polyether-modified polysiloxanes, fluorocarbon based modified polyorganosiloxane, carboxylic alkyl modified polyorganosiloxane, mercapto alkyl modified polyorganosiloxane, ammonia alkyl polysiloxanes, quaternary ammonium salt modified polysiloxane, hydroxyl alkyl modified polyorganosiloxane, chlorocarbon based polysiloxane, cyanoalkyl polysiloxanes, long chain alkane radical siloxane.
The mode of filming of low surface energy coatings can be brushing, dip-coating, spraying.
The drying of low surface energy coatings can be air drying and high temperature drying.Air drying refers to that under the room temperature natural conditions no rain, nothing snow, no mist descend dry, and high temperature drying refers to hyperthermia drying between 50～450 ℃.
The over-sprayed paint fog cleaning can be manually to remove and the water under high pressure removing.Manually removing can be free-hand or be removed or root out with the nonmetal instrument of non-hard metal.Or shatter behind the dry accumulation over-sprayed paint fog layer with the metal enlarging hammer, with free-hand or remove or root out with the protection low surface energy coat with non-hard nonmetal instrument and avoid the effective life cycle of breakage with the prolongation low surface energy coat.
Water under high pressure is removed and to be meant the water under high pressure of using less than 40 MPas, shear earlier open the over-sprayed paint fog layer after, use the angle that tilts with respect to the over-sprayed paint fog layer, the mode of utilizing the pressure of water that the over-sprayed paint fog layer is removed from protected parts.The parts of its over-sprayed paint fog can not dry or simply toast to adapt to the littler pressure of giant, reduce the solvent in the over-sprayed paint fog.The come off collection of over-sprayed paint fog layer, over-sprayed paint fog layer free-hand or that instrument is removed is directly collected, and water under high pressure is removed and can be collected with screen pack.
The waste water of crossing with high pressure water washing does not contain waste paint slag and organic solvent fully through after filtering, and can reclaim or directly discharge with water tank.
The waste paint slag of undried accumulation over-sprayed paint fog is put into drying oven, and oven dry is handled, and the drying oven exhaust outlet is provided with active carbon, adsorbent solution retracting device.
The waste paint slag of bone dry is packed after with the pulverizer crushing screening.
Useless lacquer after the pulverizing can be used as the filler of plastics, rubber, coating.
The specific embodiment
Following examples will the present invention is further illustrated, but be not to be used to limit the scope of the invention, and anyly is familiar with the technology of the present invention field person, without prejudice to spirit of the present invention following modification of being reached and variation, all belongs to scope of the present invention.
Embodiment 1
Get spray room protective coating (the intelligent one-tenth coating in Changchun Co., Ltd provides) and evenly be sprayed on the test plate (panel) of 20 centimetres of 10 cm x, placed 10 minutes.Be coated with in getting simultaneously, colored paint, varnish respectively spray one of test plate (panel).Put into that same baking oven observes that dry film is coated with down, varnish, colored paint do not have shrinkage cavity.
Embodiment 2
Get the dry test plate (panel) first of spray room protective coating (the intelligent one-tenth coating in Changchun Co., Ltd provides) and do with another test plate (panel) second of doing the shrinkage cavity experiment whether the metastatic experiment is arranged.One one side facing to the model second that will do the shrinkage cavity experiment of spray room protective coating is arranged, and sampling plate is done the shrinkage cavity experiment after 30 minutes.No shrinkage cavity.
Embodiment 3
Per 0.8 kilogram of spray room protective coating (the intelligent one-tenth coating in Changchun Co., Ltd provides) evenly is sprayed on the sled, and 35～45 microns of thickness dried 3 hours, and the paint line of getting on the car is normally moved (in be coated with the finish paint production line) and sprayed 10 sleds altogether.
Embodiment 4
Get 5 of 3 test sleds of embodiment,, take off, clean, clean with 15 MPa water under high pressures with water under high pressure from production line in 60 circulations of paint line operation, on average every 11 minutes consuming time, thick 0.5～2.5 millimeter of the over-sprayed paint fog of accumulation.
Embodiment 5
Get and implement 5 of 3 test sleds and take off from production line in 60 circulations of paint line operation, manually knock the layer of paint that shattered with flat hammer, free-hand and remove with the flat, plastic shovel, on average every sled is 15 minutes.
Embodiment 6
Get embodiment 4,5 sleds, last paint line operation repeats embodiment 4,5,10 times.Protective layer is cleaned 10 times repeatedly, and its protective finish fully as before.
Embodiment 7
Get grid, each grid coats with lacquer the zone with 0.3 kilogram of spray room protective coating (the intelligent one-tenth coating in Changchun Co., Ltd provides), room temperature.Be placed on varnish electrostatic spraying zone respectively, the zone of spraying paint by hand, in be coated with the hand spray zone, in be coated with the electrostatic spraying zone.Under normal production conditions, placed for 1 week.
Embodiment 8
Get embodiment 7 flase floors and clean, average every square metre of 7 minutes grid time spent with 20 MPa water.
Embodiment 9
Get grid and repeat embodiment 7,8, wash weekly 1 time.Wash altogether 15 times.The observation protective layer is complete, and the peeling force of useless lacquer on protective layer is still very little, is peeled easily.
Embodiment 10
Get embodiment 8,9, remove accumulation down 10 kilograms of layer of paint, put into 110 ℃ of the drying ovens that air draft place has the activated adoption device, toasted taking-up dry weight 9.4kg, crushing screening 1 hour.
Embodiment 11
Get embodiment 10, alkyd paint vehicle 38%, red 0.2%, titanium dioxide 3.0%, anti-heavy glue 3.8%, embodiment 10 15%, lithopone 5.0%, solvent 35%, salt water resistance 15 days, 120 microns of covering powers.
Claims (9)
- One kind based on use the permanent protection of low surface energy coatings spray paint environment down the parts method and over-sprayed paint fog cleans and over-sprayed paint fog recirculation use.This method comprises:1) low surface energy coatings selects for use;2) application of protected utensil;3) cleaning of over-sprayed paint fog;4) recovery of over-sprayed paint fog;5) recirculation of over-sprayed paint fog is used.
- 2. as low surface energy coatings in the claim 1, it is characterized in that its surface can be lower than 25 dynes per centimeter.
- 3. the content as low-surface-energy material in the claim 2 accounts for 0.1%～50% of coating total amount.
- 4. include following optional low-surface-energy component as low-surface-energy material in the claim 3: fluoropolymer resin, silicon-containing polymer resin (comprising the silicon-fluorine polymer resin), fluorine-containing surfactant, silicon-containing surfactant (comprising fluoride silicon surfactant).
- 5. as in the claim 1, the application of protected utensil can be spraying, brushing, dip-coating mode, can drying at room temperature or oven dry.
- 6. as in the claim 1, over-sprayed paint fog cleans and can remove less than 40 MPa water under high pressures by hand or with pressure.
- 7. as in the claim 1, sprayed paint fog reclaims and can directly reclaim, or reclaim the oven dry back.
- 8. as in the claim 7, drying room or drying oven air draft were connected to active carbon, solvent recovery unit when oven dry was reclaimed.
- 9. as in the claim 1, the over-sprayed paint fog that reclaim dry back is recycled in the filler of plastics, rubber, coating after can pulverizing with pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103003124A CN101209442A (en) | 2007-12-25 | 2007-12-25 | Over-sprayed paint fog cleaning and recycling using in coating production |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007103003124A CN101209442A (en) | 2007-12-25 | 2007-12-25 | Over-sprayed paint fog cleaning and recycling using in coating production |
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| CN101209442A true CN101209442A (en) | 2008-07-02 |
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| CNA2007103003124A Pending CN101209442A (en) | 2007-12-25 | 2007-12-25 | Over-sprayed paint fog cleaning and recycling using in coating production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102781592A (en) * | 2009-12-18 | 2012-11-14 | 化学工业有限公司 | Product and process for simultaneous cleaning, painting, and impregnation of an aqueous base for plastic pieces |
| CN103396736A (en) * | 2013-08-01 | 2013-11-20 | 深圳市彩虹精细化工股份有限公司 | Novel water-based aerosol anticorrosive primer free of rust removal, and preparation method thereof |
| CN105222140A (en) * | 2015-10-20 | 2016-01-06 | 浙江工商大学 | A kind of waste gas purification apparatus for high-temperature heating device and method |
-
2007
- 2007-12-25 CN CNA2007103003124A patent/CN101209442A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102781592A (en) * | 2009-12-18 | 2012-11-14 | 化学工业有限公司 | Product and process for simultaneous cleaning, painting, and impregnation of an aqueous base for plastic pieces |
| CN103396736A (en) * | 2013-08-01 | 2013-11-20 | 深圳市彩虹精细化工股份有限公司 | Novel water-based aerosol anticorrosive primer free of rust removal, and preparation method thereof |
| CN103396736B (en) * | 2013-08-01 | 2016-01-13 | 深圳市彩虹精细化工股份有限公司 | Novel aqueous release rust aerial fog type anti-corrosion primer and preparation method thereof |
| CN105222140A (en) * | 2015-10-20 | 2016-01-06 | 浙江工商大学 | A kind of waste gas purification apparatus for high-temperature heating device and method |
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