CN105983300A - Treatment process for paint exhaust gas - Google Patents
Treatment process for paint exhaust gas Download PDFInfo
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- CN105983300A CN105983300A CN201510057146.4A CN201510057146A CN105983300A CN 105983300 A CN105983300 A CN 105983300A CN 201510057146 A CN201510057146 A CN 201510057146A CN 105983300 A CN105983300 A CN 105983300A
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Abstract
The invention discloses a treatment process for paint exhaust gas. The process comprises the following steps: (a) carrying out dust removal: enabling the paint exhaust gas to pass through a pipeline, and then, carrying out filtering for dust removal by an air filter; (b) carrying out circulating water cooling; (c) carrying out plasma purification: subjecting the exhaust gas to purification through a low-temperature plasma purifier, performing ultrahigh-voltage pulse corona and subjecting organic exhaust gas to glow discharge, then, introducing the exhaust gas into a pool, and carrying out stirring, so as to form paint wastewater; (d) carrying out pretreatment: pretreating the paint wastewater through a Fenton reagent; (e) carrying out coagulation: carrying out coagulation in three stages; (f) carrying out air floatation: carrying out air floatation in three stages; (g) carrying out deep treatment: carrying out sand filtering and activated carbon filtering at the filtering rate of 10m<3>/(m<2>.h) to 12m<3>/(m<2>.h) and the backwashing rate of 16L/(m<2>.s) to 18L/(m<2>.s); (h) carrying out bioreactor treatment: treating the paint wastewater through an MBR (Membrane Bioreactor) membrane; and (i) carrying out sludge treatment: removing sludge through a precipitation tank. According to the treatment process for the paint exhaust gas, hazardous substances in the paint exhaust gas can be in line with emission standards, and the treated exhaust gas is low in air pollution and is hardly harmful to the human; and the treatment process is simple and is relatively high in efficiency.
Description
[technical field]
The technical field of the paint exhaust-gas treatment that the present invention relates to, a kind of process technique painting waste gas
Technical field.
[background technology]
A lot of process of producing product need to paint and processes, and the raw material of product is different, composition and dense
Degree differs, and what wherein main needs controlled is ratio contained by toluene and dimethylbenzene.It addition, polish at polishing table
Add and also can produce dust waste gas man-hour simultaneously.The most commonly used VOCs treatment method is main
Having heat accumulating type catalytic combustion method, adsorption/desorption catalyzing method, adsorption/desorption catalyzing method use cost is higher, long
Phase operational effect is unstable, and undulate invests higher, complex management, has secondary pollution, belongs to tradition work
Skill；And equipment investment used by heat accumulating type catalytic combustion method is higher, floor space is big, safeguards complexity, needs
Professional manipulates, and limitation high-concentration waste gas is main, needs preheating, and heat loss is serious.Air gives up at present
Gas disposal has been occurred in that the technique purified by plasma purifier, plasma organic waste gas purifier work
Make principle: use super-high pressure pulse corona technology, when there being face waste gas to enter in high voltage electric field module, high-tension electricity
Under the impulse electric corona effect of running voltage, there is strong glow discharge, interior time of electricity block template in field generator
The strong purple light of cloth, the Organic substance in organic exhaust gas, can be within the extremely short time under strong purple light effect, waste gas wink
Between be activated, free energy surges becomes anakmetomeres, these activation divided occur frequent impact moment,
Kinetic energy transforms into intramolecular potential energy, and original chemical bond ruptures, and generates new harmless single former
Edema of the legs during pregnancy body, thus reach to purify purpose.After reacted, harmful HC compound is converted into nontoxic CO2With
H2O, but the plasma cleaning paint exhaust-gas treatment being applied in mirror technique processed there is also corresponding problem and needs to solve,
Water smoke etc. is there is as painted that exhaust-gas treatment air quantity is relatively big, EGT high, in waste gas.
[summary of the invention]
The purpose of the present invention solves the problems of the prior art exactly, proposes a kind of process technique painting waste gas,
The harmful substance in paint waste gas can be made to meet discharge standard, and the waste gas after process is little to air pollution, right
Human body does not the most injure, and processes technique simple, and cost is relatively low, and efficiency is higher.
For achieving the above object, the present invention proposes a kind of process technique painting waste gas, comprises the following steps:
A) dedusting, paint waste gas by after pipeline through air filter dust removal by filtration；
B) recirculated water cooling: the waste gas after dedusting by be furnished with water cooled pipeline passage lower the temperature, temperature be down to 10 DEG C～
15℃；
C) plasma cleaning, waste gas passes through low-temperature plasma purifier, by super-high pressure pulse corona, organic
Waste gas glow discharge, is then passed through pond by discarded, forms paint waste water by stirring；
D) pretreatment: paint waste water is carried out pretreatment by Fenton reagent；
E) coagulation: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, the time of staying 25～35min；Two
Level adds FeSO4, the time of staying 28～36min；Three grades add the PAM time of staying 55～65min；
F) air supporting: air supporting is divided into three grades, one-level pH8.5～9.0, the time of staying 27～36min；Two grades add
PAC, the time of staying 24～33min；Three grades add PAM, the time of staying 58～66min；
G) advanced treating: filtered by sand filtration and activated carbon, the rate of filtration 10～12m3/(m2H), recoil
Wash speed 16～18L/ (m2·s)；
H) bioreactor: paint waste water is processed by MBR film；
I) Treatment of Sludge: mud is removed by sedimentation tank.
As preferably, described step b) recirculated water cooling: the waste gas after dedusting is by being furnished with the passage of water cooled pipeline
Cooling, temperature is down to 12 DEG C.
As preferably, described step e) coagulation: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, stops
Stay time 25min；Two grades add FeSO4, time of staying 28min；Three grades add PAM time of staying 55min.
As preferably, described step e) coagulation: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, stop
Time 35min；Two grades add FeSO4, time of staying 36min；Three grades add PAM time of staying 65min.
As preferably, described step f) air supporting: air supporting is divided into three grades, one-level pH8.5, time of staying 28min；
Two grades add PAC, time of staying 25min；Three grades add PAM, time of staying 60min.
As preferably, described step f) air supporting: air supporting is divided into three grades, one-level pH9.0, time of staying 35min；
Two grades add PAC, time of staying 30min；Three grades add PAM, time of staying 65min.
As preferably, described step g) advanced treating: filtered by sand filtration and activated carbon, rate of filtration 11m3/
(m2H), backwash speed 16L/ (m2·s)。
Beneficial effects of the present invention: the present invention will be by painting waste gas through filtering and after glow discharge, being dissolved in
In water, then sewage is processed, it is possible to make the harmful substance in paint waste gas meet discharge standard, process
After waste gas little to air pollution, human body is not the most injured, processes technique simple, cost is relatively low, effect
Rate is higher.
Inventive feature and advantage will be described in detail by embodiment.
[detailed description of the invention]
A kind of process technique painting waste gas of the present invention, following steps: a) dedusting, paint waste gas passes through pipeline
By air filter dust removal by filtration；B) recirculated water cooling: the waste gas after dedusting is by being furnished with the logical of water cooled pipeline
Road lowers the temperature, and temperature is down to 10 DEG C～15 DEG C；C) plasma cleaning, waste gas passes through low-temperature plasma purifier,
By super-high pressure pulse corona, organic exhaust gas glow discharge, then it is passed through pond by discarded, by stirring shape
Become paint waste water；D) pretreatment: paint waste water is carried out pretreatment by Fenton reagent；E) coagulation: mixed
Coagulating and be divided into three grades, one-level pH10.5 adds CaCl2, the time of staying 25～35min；Two grades add FeSO4, stop
Stay the time 28～36min；Three grades add the PAM time of staying 55～65min；F) air supporting: air supporting is divided into three grades,
One-level pH8.5～9.0, the time of staying 27～36min；Two grades add PAC, the time of staying 24～33min；Three
Level adds PAM, the time of staying 58～66min；G) advanced treating: filtered by sand filtration and activated carbon, cross filtering velocity
Degree 10～12m3/(m2H), backwash speed 16～18L/ (m2·s)；H) bioreactor: pass through MBR
Paint waste water is processed by film；I) Treatment of Sludge: mud is removed by sedimentation tank.Described step b) follows
Ring water-cooled: the waste gas after dedusting is lowered the temperature by being furnished with the passage of water cooled pipeline, and temperature is down to 12 DEG C.Described step
Rapid e) coagulation: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, time of staying 25min；Two grades of additions
FeSO4, time of staying 28min；Three grades add PAM time of staying 55min.Described step e) coagulation: coagulation
Being divided into three grades, one-level pH10.5 adds CaCl2, time of staying 35min；Two grades add FeSO4, the time of staying
36min；Three grades add PAM time of staying 65min.Described step f) air supporting: air supporting is divided into three grades, one-level pH8.5,
Time of staying 28min；Two grades add PAC, time of staying 25min；Three grades add PAM, time of staying 60min.
Described step f) air supporting: air supporting is divided into three grades, one-level pH9.0, time of staying 35min；Two grades add PAC,
Time of staying 30min；Three grades add PAM, time of staying 65min.Described step g) advanced treating: pass through sand
Filter and activated carbon filter, rate of filtration 11m3/(m2H), backwash speed 16L/ (m2·s)。
Above-described embodiment is the description of the invention, is not limitation of the invention, any simple to the present invention
Scheme after conversion belongs to protection scope of the present invention.
Claims (7)
1. the process technique painting waste gas, it is characterised in that: comprise the following steps:
A) dedusting, paint waste gas by after pipeline through air filter dust removal by filtration；
B) recirculated water cooling: the waste gas after dedusting by be furnished with water cooled pipeline passage lower the temperature, temperature be down to 10 DEG C～
15℃；
C) plasma cleaning, waste gas passes through low-temperature plasma purifier, by super-high pressure pulse corona, organic
Waste gas glow discharge, is then passed through pond by discarded, forms paint waste water by stirring；
D) pretreatment: paint waste water is carried out pretreatment by Fenton reagent；
E) coagulation: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, the time of staying 25～35min；Two
Level adds FeSO4, the time of staying 28～36min；Three grades add the PAM time of staying 55～65min；
F) air supporting: air supporting is divided into three grades, one-level pH8.5～9.0, the time of staying 27～36min；Two grades add
PAC, the time of staying 24～33min；Three grades add PAM, the time of staying 58～66min；
G) advanced treating: filtered by sand filtration and activated carbon, the rate of filtration 10～12m3/(m2H), recoil
Wash speed 16～18L/ (m2·s)；
H) bioreactor: paint waste water is processed by MBR film；
I) Treatment of Sludge: mud is removed by sedimentation tank.
A kind of process technique painting waste gas the most as claimed in claim 1, it is characterised in that: described step b) follows
Ring water-cooled: the waste gas after dedusting is lowered the temperature by being furnished with the passage of water cooled pipeline, and temperature is down to 12 DEG C.
A kind of process technique painting waste gas the most as claimed in claim 1, it is characterised in that: described step e) mixes
Solidifying: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, time of staying 25min；Two grades add FeSO4,
Time of staying 28min；Three grades add PAM time of staying 55min.
A kind of process technique painting waste gas the most as claimed in claim 1, it is characterised in that: described step e) mixes
Solidifying: coagulation is divided into three grades, one-level pH10.5 adds CaCl2, time of staying 35min；Two grades add FeSO4,
Time of staying 36min；Three grades add PAM time of staying 65min.
A kind of process technique painting waste gas the most as claimed in claim 1, it is characterised in that: described step f) gas
Floating: air supporting is divided into three grades, one-level pH8.5, time of staying 28min；Two grades add PAC, time of staying 25min；
Three grades add PAM, time of staying 60min.
A kind of process technique painting waste gas the most as claimed in claim 1, it is characterised in that: described step f) gas
Floating: air supporting is divided into three grades, one-level pH9.0, time of staying 35min；Two grades add PAC, time of staying 30min；
Three grades add PAM, time of staying 65min.
A kind of process technique painting waste gas the most as claimed in claim 1, it is characterised in that: described step g) is deep
Degree processes: filtered by sand filtration and activated carbon, rate of filtration 11m3/(m2H), backwash speed 16L/
(m2·s)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057146.4A CN105983300A (en) | 2015-01-31 | 2015-01-31 | Treatment process for paint exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057146.4A CN105983300A (en) | 2015-01-31 | 2015-01-31 | Treatment process for paint exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105983300A true CN105983300A (en) | 2016-10-05 |
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ID=57035832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510057146.4A Pending CN105983300A (en) | 2015-01-31 | 2015-01-31 | Treatment process for paint exhaust gas |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872691A (en) * | 2012-09-24 | 2013-01-16 | 浙江大明玻璃有限公司 | Paint waste gas treatment process |
| CN103041945A (en) * | 2012-12-28 | 2013-04-17 | 东莞市四友机械设备有限公司 | Paint room with paint production waste gas treatment system, and paint production waste gas treatment method |
| CN203065291U (en) * | 2013-02-06 | 2013-07-17 | 厦门仲欧环保科技有限公司 | Closed cycle treatment system for paint-spraying wastewater |
| CN103449678A (en) * | 2013-09-12 | 2013-12-18 | 安徽省绿巨人环境技术有限公司 | Agricultural equipment coating wastewater treatment technology |
| CN103739165A (en) * | 2014-01-08 | 2014-04-23 | 新疆德安环保科技有限公司 | Recycling treatment method for automobile coating wastewater |
| CN104139938A (en) * | 2014-08-01 | 2014-11-12 | 南京大学盐城环保技术与工程研究院 | Storage tank respiratory air collecting and purifying system and method |
-
2015
- 2015-01-31 CN CN201510057146.4A patent/CN105983300A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872691A (en) * | 2012-09-24 | 2013-01-16 | 浙江大明玻璃有限公司 | Paint waste gas treatment process |
| CN103041945A (en) * | 2012-12-28 | 2013-04-17 | 东莞市四友机械设备有限公司 | Paint room with paint production waste gas treatment system, and paint production waste gas treatment method |
| CN203065291U (en) * | 2013-02-06 | 2013-07-17 | 厦门仲欧环保科技有限公司 | Closed cycle treatment system for paint-spraying wastewater |
| CN103449678A (en) * | 2013-09-12 | 2013-12-18 | 安徽省绿巨人环境技术有限公司 | Agricultural equipment coating wastewater treatment technology |
| CN103739165A (en) * | 2014-01-08 | 2014-04-23 | 新疆德安环保科技有限公司 | Recycling treatment method for automobile coating wastewater |
| CN104139938A (en) * | 2014-08-01 | 2014-11-12 | 南京大学盐城环保技术与工程研究院 | Storage tank respiratory air collecting and purifying system and method |
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Application publication date: 20161005 |