CN104876392A - Coating wastewater treatment process - Google Patents
Coating wastewater treatment process Download PDFInfo
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- CN104876392A CN104876392A CN201510234660.0A CN201510234660A CN104876392A CN 104876392 A CN104876392 A CN 104876392A CN 201510234660 A CN201510234660 A CN 201510234660A CN 104876392 A CN104876392 A CN 104876392A
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Abstract
The invention discloses a coating wastewater treatment process which comprises the following steps: filtering through a crude fence and a fine fence, carrying out demulsification treatment on grease wastewater, dewatering sludge for recovery, carrying out surface phosphating on the workpiece, carrying out centralized treatment on electrophoresis wastewater, carrying out centralized treatment on the high-polymer resins, pigments, powder, surfactant and assistants in the coating wastewater, floating, carrying out aeration purification, mixing with low-concentration wastewater, carrying out batch treatment on the wastewater, inoculating into a biological oxidation pool, carrying out secondary treatment on the wastewater, trapping high-molecular organic substances by a membrane separation technique, adding sodium hypochlorite into ammonia nitrogen, recovering salts, filtering through drift sand, filtering the wastewater through activated carbon, and discharging the purified water. The coating wastewater treatment process is simple in technique and enhances the wastewater recovery and utilization ratio.
Description
Technical field
The present invention relates to application automatic field, particularly relate to a kind of coating wastewater processing technological flow.
Background technology
Application is widely used in machinery, automobile, elevator, household electrical appliances, fixture, electron trade, coating wastewater is extensive, paint industry is that environmental protection industry (epi) emphasis sewage discharges industry, environment is worked the mischief, it is many that paint industry produces kind of waste water, in coated workpieces pre-treatment, degreasing, surface adjustment, bonderizing, Passivation Treatment, electrophoresis, spraying, waste water is had to produce in painting process, waste component is complicated, containing resin in waste water, tensio-active agent, heavy metal ion, the pollutents such as paint block pigment, pigment has toxicity, also containing carcinogenic substances such as nickel ions, if do not deal carefully with, severe contamination can be produced to environment.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of coating wastewater processing technological flow, physico-chemical process and biochemical method is adopted to combine, effectively reclaiming clean is carried out to waste water, improve environmental quality, process technology rationally reliably simultaneously, floor space is few, treatment effect good, have good environmental benefit and social benefit.
Described coating wastewater processing technological flow comprises following step:
The first step: the iron rust produced in Workpiece coating pretreatment process, patina block, and other block objects are successively by thick fence, thin fence filters, and blocky-shaped particle and scum silica frost are removed.
Second step: carry out pre-treatment to the oil wastewater produced in Workpiece coating process, oil-containing waste water process adopts physical method, adopts missible oil absorption machine, adsorbs grease.
3rd step: after the oil-containing waste water process of second step, concentrates on oil-containing waste water in degrease reactive tank, adds CaCl2, adopt salting-out method, carry out breakdown of emulsion process, then add coagulating agent, through mixing, reaction, precipitation, layering, is separated upper strata grease, bottom mud is discharged simultaneously, degrease water outlet is focused on factory effluent equalizing tank.
4th step: the mud that the 3rd step produces is entered sludge sump, mud is carried out dewatering and recovery utilization in sludge sump, press filtration becomes mud cake outward transport.
5th step: in Workpiece coating process, the parkerized waste water of workpiece surface in pre-treatment is processed, phosphorus-containing wastewater is concentrated in Waste Water Centralized groove, carry out dephosphorization operation, add milk of lime, regulate waste water ph to 10, then add flocculation agent (PAC), coagulant aids (PAM), make phosphate in waste water generate hydroxyapatite.Then, swash plate is adopted to be separated solid.Optimal technical scheme in one, described solid precipitation adopts bottom leaning tower structure, is convenient to impurity sedimentation in water.
6th step: to electrophoresis Wastewater Concentrated, the electrophoresis waste water water yield is comparatively large, and organic concentration is high, also containing a large amount of electrophoresis slag, in electrophoresis waste water, adds appropriate PAC, PAM, then produces colloidal precipitation effect.
7th step: macromolecule resin, pigment, pulvis, tensio-active agent, auxiliary agent in coating wastewater are focused on, after adding inorganic flocculating agent, make the stabilising system that the trickle suspended particle of colloid is formed in water, make it be gathered into the flocs unit of obvious sediment performance, then formation precipitation or scum silica frost are removed.
8th step: the waste water in the 7th step, after precipitation, carry out air supporting, then carry out aeration purification further.
9th step: the 3rd step, the 5th step, the 6th step, the low concentration wastewater of the 8th step mixes, and enter into waste water collection tank, waste water carries out batch processing.
Tenth step: the waste water access bio-oxidation pond in the 9th step, at the bottom of pond, solarization air cap is set, by gas blower blast aeration, utilize stirrer to stir simultaneously, by the microbial film on filler in bio-oxidation pond, macromolecule organic, be degraded to low molecule organic matter, remove the solvability organic pollutant in sewage, sewage is purified.
11 step: carry out second-stage treatment to the waste water in the tenth step, adopts membrane separation technique that larger molecular organics matter is retained.
12 step: to NH_3-N treating too much in 11 steps, adds clorox, and clorox is joined in waste water, and NH3 and NACLO reaction produces nitrogen, and concrete reaction method is: 3NACLO+2NH3=N2 ↑+3NACL+3H2O;
13 step: salt reclaims, by electrodialysis appts, containing sodium, cupric, reclaims containing iron ion.
14 step: the waste water after 13 steps, through running sand filtration device, removes the suspended substance in water further, ensures the stably reaching standard of water outlet.
15 step: waste water is carried out activated carbon filtration, ensures water quality.
16 step: discharge purified water, carrying out qualified discharge, a kind of optimal technical scheme the water after process, arranging Water quality detector, for detecting discharge water quality condition at discharge purified water mouth.
The invention has the beneficial effects as follows: a kind of coating wastewater processing technological flow of the present invention, technique is simple, greatly can improve the environment-friendly quality of paint industry, improves the utilization ratio that waste water circulation reclaims.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Described coating wastewater processing technological flow comprises following step:
The first step: the iron rust produced in Workpiece coating pretreatment process, patina block, and other block objects are successively by thick fence, thin fence filters, and blocky-shaped particle and scum silica frost are removed.
Second step: carry out pre-treatment to the oil wastewater produced in Workpiece coating process, oil-containing waste water process adopts physical method, adopts missible oil absorption machine, adsorbs grease.
3rd step: after the oil-containing waste water process of second step, concentrates on oil-containing waste water in degrease reactive tank, adds CaCl2, adopt salting-out method, carry out breakdown of emulsion process, then add coagulating agent, through mixing, reaction, precipitation, layering, is separated upper strata grease, bottom mud is discharged simultaneously, degrease water outlet is focused on factory effluent equalizing tank.
4th step: the mud that the 3rd step produces is entered sludge sump, mud is carried out dewatering and recovery utilization in sludge sump, press filtration becomes mud cake outward transport.
5th step: in Workpiece coating process, the parkerized waste water of workpiece surface in pre-treatment is processed, phosphorus-containing wastewater is concentrated in Waste Water Centralized groove, carry out dephosphorization operation, add milk of lime, regulate waste water ph to 10, then add flocculation agent (PAC), coagulant aids (PAM), make phosphate in waste water generate hydroxyapatite.Then, swash plate is adopted to be separated solid.Optimal technical scheme in one, described solid precipitation adopts bottom leaning tower structure, is convenient to impurity sedimentation in water.
6th step: to electrophoresis Wastewater Concentrated, the electrophoresis waste water water yield is comparatively large, and organic concentration is high, also containing a large amount of electrophoresis slag, in electrophoresis waste water, adds appropriate PAC, PAM, then produces colloidal precipitation effect.
7th step: macromolecule resin, pigment, pulvis, tensio-active agent, auxiliary agent in coating wastewater are focused on, after adding inorganic flocculating agent, make the stabilising system that the trickle suspended particle of colloid is formed in water, make it be gathered into the flocs unit of obvious sediment performance, then formation precipitation or scum silica frost are removed.
8th step: the waste water in the 7th step, after precipitation, carry out air supporting, then carry out aeration purification further.
9th step: the 3rd step, the 5th step, the 6th step, the low concentration wastewater of the 8th step mixes, and enter into waste water collection tank, waste water carries out batch processing.
Tenth step: the waste water access bio-oxidation pond in the 9th step, at the bottom of pond, solarization air cap is set, by gas blower blast aeration, utilize stirrer to stir simultaneously, by the microbial film on filler in bio-oxidation pond, macromolecule organic, be degraded to low molecule organic matter, remove the solvability organic pollutant in sewage, sewage is purified.
11 step: carry out second-stage treatment to the waste water in the tenth step, adopts membrane separation technique that larger molecular organics matter is retained.
12 step: to NH_3-N treating too much in 11 steps, adds clorox, and clorox is joined in waste water, and NH3 and NACLO reaction produces nitrogen, and concrete reaction method is: 3NACLO+2NH3=N2 ↑+3NACL+3H2O;
13 step: salt reclaims, by electrodialysis appts, containing sodium, cupric, reclaims containing iron ion.
14 step: the waste water after 13 steps, through running sand filtration device, removes the suspended substance in water further, ensures the stably reaching standard of water outlet.
15 step: waste water is carried out activated carbon filtration, ensures water quality.
16 step: discharge purified water, carrying out qualified discharge, a kind of optimal technical scheme the water after process, arranging Water quality detector, for detecting discharge water quality condition at discharge purified water mouth.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a coating wastewater processing technological flow, is characterized in that, comprising: following step:
The first step: the iron rust produced in Workpiece coating pretreatment process, patina block, and other block objects are successively by thick fence, thin fence filters;
Second step: carry out pre-treatment to the oil wastewater produced in Workpiece coating process, adopts missible oil absorption machine, adsorbs grease;
3rd step: after the oil-containing waste water process of second step, concentrates on oil-containing waste water in degrease reactive tank, adds CaCl2, adopts salting-out method, carry out breakdown of emulsion process, then add coagulating agent, through mixing, reaction, precipitation, layering, is separated upper strata grease, bottom mud is discharged simultaneously;
4th step: the mud that the 3rd step produces is entered sludge sump, mud is carried out dewatering and recovery utilization in sludge sump, press filtration becomes mud cake outward transport;
5th step: in Workpiece coating process, the parkerized waste water of workpiece surface in pre-treatment is processed, phosphorus-containing wastewater is concentrated in Waste Water Centralized groove, carry out dephosphorization operation, add milk of lime, regulate waste water ph to 10, then flocculation agent, coagulant aids is added, make phosphate in waste water generate hydroxyapatite, then, adopt swash plate to be separated solid;
6th step: to electrophoresis Wastewater Concentrated, adds appropriate PAC, PAM in electrophoresis waste water, then produces colloidal precipitation effect;
7th step: focus on macromolecule resin, pigment, pulvis, tensio-active agent, auxiliary agent in coating wastewater, add inorganic flocculating agent, makes it be gathered into the flocs unit of obvious sediment performance, and then formation precipitation or scum silica frost are removed.
2. the 8th step: the waste water in the 7th step, after precipitation, carry out air supporting, carry out aeration purification;
9th step: the 3rd step, the 5th step, the 6th step, the low concentration wastewater of the 8th step mixes, and enter into waste water collection tank, waste water carries out batch processing;
Tenth step: the waste water access bio-oxidation pond in the 9th step, at the bottom of pond, solarization air cap is set, by gas blower blast aeration, utilizes stirrer to stir simultaneously, by the microbial film on filler in bio-oxidation pond, macromolecule organic, be degraded to low molecule organic matter;
11 step: carry out second-stage treatment to the waste water in the tenth step, adopts membrane separation technique that larger molecular organics matter is retained;
12 step: to NH_3-N treating too much in 11 steps, adds clorox;
13 step: salt reclaims, by electrodialysis appts, containing sodium, cupric, reclaims containing iron ion;
14 step: the waste water after 13 steps, through running sand filtration device, removes the suspended substance in water further;
15 step: waste water is carried out activated carbon filtration;
16 step: discharge purified water, carries out qualified discharge the water after process.
3. a kind of coating wastewater processing technological flow according to claim 1, is characterized in that, in the 5th described step, solid precipitation adopts bottom leaning tower structure, is convenient to impurity sedimentation in water.
4. a kind of coating wastewater processing technological flow according to claim 1, is characterized in that, arrange Water quality detector at discharge purified water mouth, for detecting discharge water quality condition.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330095A (en) * | 2015-10-16 | 2016-02-17 | 安徽省巢湖铸造厂有限责任公司 | Regeneration reuse method for phosphorization wastewater |
| CN105417840A (en) * | 2015-11-02 | 2016-03-23 | 安徽洋森环保节能科技有限公司 | Treatment method for coating pretreatment wastewater |
| CN105884148A (en) * | 2016-06-24 | 2016-08-24 | 安徽国能亿盛环保科技有限公司 | Automobile coating sewage treatment process |
| CN106746353A (en) * | 2017-01-18 | 2017-05-31 | 安徽亚泰环境工程技术有限公司 | A kind of coating surface treatment industry waste water, the handling process of waste liquid |
| CN107857424A (en) * | 2017-10-20 | 2018-03-30 | 航天凯天环保科技股份有限公司 | A kind of method for removing black and odorous water |
| CN109133431A (en) * | 2018-10-08 | 2019-01-04 | 天津城建大学 | A kind of integrating device and method of the orientation recycling hydroxyapatite from coating wastewater |
| CN110028140A (en) * | 2019-01-11 | 2019-07-19 | 一汽-大众汽车有限公司 | A kind of processing method and system of water paint solvent slop |
| CN110395825A (en) * | 2019-08-30 | 2019-11-01 | 常州市罗军机械设备有限公司 | A kind of paint spray booth liquid waste treating apparatus |
| CN110981076A (en) * | 2019-10-23 | 2020-04-10 | 盐城特立涂装专用设备有限公司 | Immersed ultrafiltration process for treating common sewage in automobile factory |
| CN112759196A (en) * | 2021-01-05 | 2021-05-07 | 广州漓源环保技术有限公司 | Treatment process of esterification wastewater |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330095A (en) * | 2015-10-16 | 2016-02-17 | 安徽省巢湖铸造厂有限责任公司 | Regeneration reuse method for phosphorization wastewater |
| CN105417840A (en) * | 2015-11-02 | 2016-03-23 | 安徽洋森环保节能科技有限公司 | Treatment method for coating pretreatment wastewater |
| CN105884148A (en) * | 2016-06-24 | 2016-08-24 | 安徽国能亿盛环保科技有限公司 | Automobile coating sewage treatment process |
| CN105884148B (en) * | 2016-06-24 | 2018-02-13 | 安徽国能亿盛环保科技有限公司 | A kind of painting dressing automobiles sewage treatment process |
| CN106746353A (en) * | 2017-01-18 | 2017-05-31 | 安徽亚泰环境工程技术有限公司 | A kind of coating surface treatment industry waste water, the handling process of waste liquid |
| CN107857424A (en) * | 2017-10-20 | 2018-03-30 | 航天凯天环保科技股份有限公司 | A kind of method for removing black and odorous water |
| CN109133431A (en) * | 2018-10-08 | 2019-01-04 | 天津城建大学 | A kind of integrating device and method of the orientation recycling hydroxyapatite from coating wastewater |
| CN109133431B (en) * | 2018-10-08 | 2023-04-28 | 天津城建大学 | Integrated device and method for directionally recycling hydroxyapatite from coating wastewater |
| CN110028140A (en) * | 2019-01-11 | 2019-07-19 | 一汽-大众汽车有限公司 | A kind of processing method and system of water paint solvent slop |
| CN110395825A (en) * | 2019-08-30 | 2019-11-01 | 常州市罗军机械设备有限公司 | A kind of paint spray booth liquid waste treating apparatus |
| CN110981076A (en) * | 2019-10-23 | 2020-04-10 | 盐城特立涂装专用设备有限公司 | Immersed ultrafiltration process for treating common sewage in automobile factory |
| CN112759196A (en) * | 2021-01-05 | 2021-05-07 | 广州漓源环保技术有限公司 | Treatment process of esterification wastewater |
| CN112759196B (en) * | 2021-01-05 | 2021-10-22 | 广州漓源环保技术有限公司 | Treatment process of esterification wastewater |
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