CN105289156A - Paint-spraying exhaust-gas processing technology - Google Patents
Paint-spraying exhaust-gas processing technology Download PDFInfo
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- CN105289156A CN105289156A CN201510783462.XA CN201510783462A CN105289156A CN 105289156 A CN105289156 A CN 105289156A CN 201510783462 A CN201510783462 A CN 201510783462A CN 105289156 A CN105289156 A CN 105289156A
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- waste gas
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- sand filter
- bed
- paint
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a paint-spraying exhaust-gas processing technology. According to the technology, paint-spraying exhaust gas enters into an immersion type sand filter bed from the bottom, a paint powder carried by the exhaust gas is partially intercepted by the sand filter bed, and a part of the paint powder flows into a circulating water processing system along with a water flow; the paint-spraying exhaust gas subjected to paint-powder interception is discharged from the top of the immersion type sand filter bed, and then enters into an immersion type biological active carbon bed from the bottom, organics in exhaust gas is decomposed in the immersion type biological active carbon bed by microbes, and after decomposition, exhaust gas is discharged from the top of the immersion type biological active carbon bed. The discharged gas satisfies atmosphere discharge standard, the flowing directions of circulating water and the paint-spraying exhaust gas are opposite and the circulating water is a reverse flow. Water discharged from the immersion type sand filter bed sequentially enters into a coagulating basin, a flocculation basin and a sedimentation basin, and discharged water then enters into the immersion type biological active carbon bed. The technology solves the problems that the paint-spraying exhaust gas easily obstructs equipment, a filter needs frequently replacing and exhaust gas cannot stably reach the standard.
Description
Technical field
The invention belongs to the technical field of waste gas treatment of environmental project, be specifically related to a kind of lacquer spraying waste gas treatment process.
Background technology
The main component of lacquer spraying waste gas is the benzene,toluene,xylene etc. of spray-dust and volatilization, and arbitrarily discharge has certain influence to surrounding environment, therefore, discharges after needing to carry out certain process.
Conventional processes flow process is mainly: lacquer spraying waste gas → Water spray tower → separating dry space from moist space → roughing efficiency air filter → charcoal absorption → discharge.
Because paint powder has viscosity, there is following several shortcoming in conventional processes: 1. system treatment effeciency is low; 2. Water spray tower easily blocks; 3. separating dry space from moist space device easily blocks; 4. roughing efficiency air filter easily blocks and changes frequent; 5. activated carbon adsorber easily blocks, and easily loses efficacy, and changes frequent; 6. system maintenance requires high.
Therefore, the exhaust gas treatment technology of a kind of low cost, efficient, easy care is needed to develop.
Summary of the invention
In order to solve the problem, the invention provides a kind of lacquer spraying waste gas treatment process, this lacquer spraying waste gas treatment process processes with " immersion sand filter+immersion biological activated carbon bed+coagulating kinetics system " group technology, solve the easy occluding device of lacquer spraying waste gas, frequent replacing filter, waste gas can not the problem of stably reaching standard.
The present invention in order to the technical scheme solving its technical problem and adopt is:
A kind of lacquer spraying waste gas treatment process, comprises the following steps:
One, lacquer spraying waste gas enters immersion sand filter bed by bottom, and the paint powder part of carrying in waste gas is retained by sand filter bed, and part flows into circular water treating system with current;
Two, the lacquer spraying waste gas having retained paint powder is discharged by immersion sand filter bed top, enter bottom immersion biological activated carbon bed again, organic matter in waste gas is decomposed by the microorganisms in immersion biological activated carbon bed, after decomposing, waste gas is discharged by immersion biological activated carbon bed top again, and the gas of discharge meets atmospheric emission standard;
Three, circular water treating system handling process is: it is adverse current that recirculated water and lacquer spraying waste gas flow to contrary, in immersion sand filter bed, water outlet enters coagulating basin, flocculation basin and sedimentation basin successively, sedimentation basin water outlet enters immersion biological activated carbon bed again, and the water outlet of immersion biological activated carbon bed enters immersion sand filter bed.
The present invention in order to the further technical scheme solving its technical problem and adopt is:
Say further, the top in described immersion biological activated carbon bed is provided with except water layer, and after decomposing, waste gas is discharged after removing water smoke except water layer.Furthermore, the described material except water layer adopts filter cotton, Pall ring or Taylor's garland.
Say further, described coagulating basin is connected with described flocculation basin one.Described coagulating basin and described flocculation basin are all provided with agitating device.
Say further, the delivery port of immersion sand filter bed is positioned at the bottom of immersion sand filter bed.
Say further, the water inlet of immersion biological activated carbon bed is positioned at the top of immersion biological activated carbon bed.
Say further, the water inlet of immersion sand filter bed is positioned at the top of immersion sand filter bed.
The invention has the beneficial effects as follows: lacquer spraying waste gas treatment process of the present invention mainly " immersion sand filter+immersion biological activated carbon bed+coagulating kinetics system " group technology processes, and has following advantage:
1, the whole processing procedure of waste gas all fully contacts with water, is wet treatment method, and paint powder treatment effeciency is high;
2, water circulation uses not outer row, and growth of microorganism nutrient is provided by recirculated water, ensures stable operation;
3, active carbon is as the carrier of growth of microorganism, can not lose efficacy, without the need to frequent replacing;
4, processing cost is low, and cost is only the electricity charge and a small amount of medicament expense, and treatment effect is good, stable.
5, plant maintenance is simple, without rapid wear, attrition component, and practicable unmanned.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention;
Fig. 2 is equipment flowsheet of the present invention.
Detailed description of the invention
Below by way of specific instantiation, the specific embodiment of the present invention is described, those skilled in the art can understand advantage of the present invention and effect easily by content disclosed in the present specification.The present invention also can be implemented in further, different ways, that is, not deviating under disclosed category, can give different modifications and change.
Embodiment: a kind of lacquer spraying waste gas treatment process, as depicted in figs. 1 and 2, comprises the following steps:
One, lacquer spraying waste gas enters immersion sand filter bed 1 by bottom, and the paint powder part of carrying in waste gas is retained by sand filter bed, and part flows into circular water treating system with current.
Two, the lacquer spraying waste gas having retained paint powder is discharged by immersion sand filter bed top, enter bottom immersion biological activated carbon bed 2 again, organic matter in waste gas is decomposed by the microorganisms in immersion biological activated carbon bed, after decomposing, waste gas is discharged by immersion biological activated carbon bed top again, top in described immersion biological activated carbon bed is provided with except water layer, except the material of water layer adopts filter cotton, Pall ring or Taylor's garland etc., after decomposing, waste gas is discharged after removing water smoke except water layer, and the gas of discharge meets atmospheric emission standard.
Three, recirculated water and waste gas streams to contrary be adverse current, paint powder is not easily bonded in sand powder and activated carbon surface, time of contact between waste gas and recirculated water can be made elongated simultaneously.In immersion sand filter bed, water outlet enters coagulating basin 3, flocculation basin 4 and sedimentation basin 5, the precipitated removal of paint slag in water, and sedimentation basin water outlet enters immersion biological activated carbon bed again, and the water outlet of immersion biological activated carbon bed enters immersion sand filter bed.Described coagulating basin is connected with described flocculation basin one.Described coagulating basin and described flocculation basin are all provided with agitating device.Because partial organic substances is dissolved, carry partial organic substances in recirculated water, this partial organic substances provides nutrient for the microorganism in immersion biological activated carbon bed again, and for its growth, a large amount of microorganisms is able to growth and breeding, forms a large amount of microbial films.The organic matter that waste gas carries is through immersion biological activated carbon bed, the microbial film be dipped in formula biological activated carbon bed retains absorption, along with system cloud gray model, biomembrane is aging to come off, neoformation film generates, old biomembrane enters circular water treating system with current, and finally discharge system with paint powder, whole system forms a circulatory system.
The present invention trys out in the Surface Treatment Engineering of Kunshan, and after this enterprise have employed the present invention, processing cost can save more than 80%, and waste gas Absorbable organic halogens is up to standard, and toxic emission situation is as following table:
As above table is visible, and actual discharge concentration is well below discharge standard.
Claims (8)
1. a lacquer spraying waste gas treatment process, is characterized in that: comprise the following steps:
One, lacquer spraying waste gas enters immersion sand filter bed by bottom, and the paint powder part of carrying in waste gas is retained by sand filter bed, and part flows into circular water treating system with current;
Two, the lacquer spraying waste gas having retained paint powder is discharged by immersion sand filter bed top, enter bottom immersion biological activated carbon bed again, organic matter in waste gas is decomposed by the microorganisms in immersion biological activated carbon bed, after decomposing, waste gas is discharged by immersion biological activated carbon bed top again, and the gas of discharge meets atmospheric emission standard;
Three, circular water treating system handling process is: it is adverse current that recirculated water and lacquer spraying waste gas flow to contrary, in immersion sand filter bed, water outlet enters coagulating basin, flocculation basin and sedimentation basin successively, sedimentation basin water outlet enters immersion biological activated carbon bed again, and the water outlet of immersion biological activated carbon bed enters immersion sand filter bed.
2. lacquer spraying waste gas treatment process as claimed in claim 1, is characterized in that: the top in described immersion biological activated carbon bed is provided with except water layer, and after decomposing, waste gas is discharged after removing water smoke except water layer.
3. lacquer spraying waste gas treatment process as claimed in claim 2, is characterized in that: the described material except water layer adopts filter cotton, Pall ring or Taylor's garland.
4. lacquer spraying waste gas treatment process as claimed in claim 1, is characterized in that: described coagulating basin is connected with described flocculation basin one.
5. lacquer spraying waste gas treatment process as claimed in claim 1, is characterized in that: described coagulating basin and described flocculation basin are all provided with agitating device.
6. lacquer spraying waste gas treatment process as claimed in claim 1, is characterized in that: the delivery port of immersion sand filter bed is positioned at the bottom of immersion sand filter bed.
7. lacquer spraying waste gas treatment process as claimed in claim 1, is characterized in that: the water inlet of immersion biological activated carbon bed is positioned at the top of immersion biological activated carbon bed.
8. lacquer spraying waste gas treatment process as claimed in claim 1, is characterized in that: the water inlet of immersion sand filter bed is positioned at the top of immersion sand filter bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783462.XA CN105289156B (en) | 2015-11-16 | 2015-11-16 | Lacquer spraying waste gas handling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783462.XA CN105289156B (en) | 2015-11-16 | 2015-11-16 | Lacquer spraying waste gas handling process |
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| Publication Number | Publication Date |
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| CN105289156A true CN105289156A (en) | 2016-02-03 |
| CN105289156B CN105289156B (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510783462.XA Active CN105289156B (en) | 2015-11-16 | 2015-11-16 | Lacquer spraying waste gas handling process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445361A (en) * | 2017-08-02 | 2017-12-08 | 奇瑞汽车股份有限公司 | One kind spray painting circular water treating system and its purification technique |
| CN110115895A (en) * | 2019-06-18 | 2019-08-13 | 波态（上海）新材料科技有限公司 | A kind of coating coating cloud processing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4224090A1 (en) * | 1991-01-25 | 1994-01-27 | Isodra Isolierte Feindraehte G | Agitated solid biological filter bed for exhaust gas purification - particularly for gases containing fine solids or carbon particles |
| CN203155045U (en) * | 2013-03-28 | 2013-08-28 | 厦门绿动力环境治理工程有限公司 | Benzene-containing paint spraying waste gas treatment system |
| CN204051405U (en) * | 2014-08-08 | 2014-12-31 | 无锡利邦厨具有限公司 | A kind of combined type deodorization tower |
| CN104587827A (en) * | 2015-02-09 | 2015-05-06 | 广州金鹏环保工程有限公司 | Comprehensive purification method and system of organic waste gas |
-
2015
- 2015-11-16 CN CN201510783462.XA patent/CN105289156B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4224090A1 (en) * | 1991-01-25 | 1994-01-27 | Isodra Isolierte Feindraehte G | Agitated solid biological filter bed for exhaust gas purification - particularly for gases containing fine solids or carbon particles |
| CN203155045U (en) * | 2013-03-28 | 2013-08-28 | 厦门绿动力环境治理工程有限公司 | Benzene-containing paint spraying waste gas treatment system |
| CN204051405U (en) * | 2014-08-08 | 2014-12-31 | 无锡利邦厨具有限公司 | A kind of combined type deodorization tower |
| CN104587827A (en) * | 2015-02-09 | 2015-05-06 | 广州金鹏环保工程有限公司 | Comprehensive purification method and system of organic waste gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445361A (en) * | 2017-08-02 | 2017-12-08 | 奇瑞汽车股份有限公司 | One kind spray painting circular water treating system and its purification technique |
| CN110115895A (en) * | 2019-06-18 | 2019-08-13 | 波态（上海）新材料科技有限公司 | A kind of coating coating cloud processing method |
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| Publication number | Publication date |
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| CN105289156B (en) | 2018-03-09 |
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