CN109879513A - A kind of painting dressing automobiles electrophoresis waste water pretreatment system and method - Google Patents
A kind of painting dressing automobiles electrophoresis waste water pretreatment system and method Download PDFInfo
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- CN109879513A CN109879513A CN201910179244.3A CN201910179244A CN109879513A CN 109879513 A CN109879513 A CN 109879513A CN 201910179244 A CN201910179244 A CN 201910179244A CN 109879513 A CN109879513 A CN 109879513A
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Abstract
The invention discloses a kind of painting dressing automobiles electrophoresis waste water pretreatment system and method, system includes the feed unit being sequentially communicated, reaction member, filter element and PH adjustment unit；Waste water containing electrophoresis liquid built in feed unit；Reaction member includes the electrophoresis reactive tank and precipitation tank being sequentially communicated, and precipitation tank includes liquid discharge outlet and mud discharging mouth, and liquid discharge outlet is connected to filter element, and sludge treatment equipment is equipped at mud discharging mouth；There are two reaction members, respectively concatenated first order reaction unit and second order reaction unit, and the precipitation tank in first order reaction unit is perpendicular stream precipitation tank, and the precipitation tank in second order reaction unit is sloping plate deposition slot.Method is to be handled using second coagulation sedimentation, and vertical sedimentation tank is used in level-one precipitation and separation, inclined-plate clarifying basin is used in two-stage precipitation separation, accurately controls coagulation process.System features in convenient of the invention, stable, process flow is simple, and draining COD concentration can be down to 1000mg/L.
Description
Technical field
The present invention relates to industrial waste water treatment more particularly to a kind of painting dressing automobiles electrophoresis waste water pretreatment systems
And method.
Background technique
The coating of automobile and its components is that most one of the link of discharge of wastewater is generated in automobile manufacturing process.Coating waste
Water contains resin, surfactant, heavy metal ion, Oil, PO4 3-, paint, pigment, the pollutants such as organic solvent, coating wastewater
Mostly come from the vehicle bodies pretreatment procedures such as pre- degreasing, degreasing, table tune, phosphatization, passivation and ability cathode electrophoresis process and middle painting, spray
Finishing coat process.Wherein painting dressing automobiles electrophoresis waste water mostlys come from the phosphatization of components production process discharge, electrophoresis waste water, mainly
Pollutant contains resin, surfactant, heavy metal ion, Oil, PO4 3-, paint, pigment, the pollutants such as organic solvent,
CODCr value is high, and microorganism can be killed by being directly entered biochemical system, reduces the effect of biochemical system processing, if not dealing carefully with, also
Serious pollution can be generated to environment.
Traditional processing method is directly to carry out coagulating treatment to composite waste, which is conventional ripening process route,
Have the characteristics that low energy consumption, operating cost is moderate, small investment.But regulation effect is undesirable, and effluent quality is unstable, it is more difficult to reach
Discharge standard.Painting wastewater especially therein is directlyed adopt containing the organic solvent that is largely dissolved in water but can not thoroughly handle
The substance for causing water eutrophication can still be contained in clear water after Coagulation with Treatment.
Summary of the invention
It is an object of the invention to overcome defect described in the prior art, to provide a kind of painting dressing automobiles electrophoresis waste water
Pretreatment system and method, the system features in convenient is stable, and this method process flow is simple, and draining COD concentration can be down to
1000mg/L after mixing biochemical treatment with life water, can stably reach national emission standard.
To achieve the goals above, the invention provides the following technical scheme:
A kind of painting dressing automobiles electrophoresis waste water pretreatment system, feed unit, reaction member, filtering including being sequentially communicated are single
Member and PH adjustment unit；
The feed unit is to receive and accommodate the waste water containing electrophoresis liquid；
The reaction member includes the electrophoresis reactive tank and precipitation tank being sequentially communicated, and the precipitation tank includes liquid discharge outlet
With mud discharging mouth, the liquid discharge outlet is connected with the filter element, and Treatment of Sludge is equipped at the mud discharging mouth
Device；
Wherein, there are two the reaction members, the first order reaction unit and second order reaction unit being respectively sequentially connected in series, institute
Stating the precipitation tank in first order reaction unit is perpendicular stream precipitation tank, and the precipitation tank in the second order reaction unit is sloping plate deposition slot.
Preferably: the feed unit includes the electrophoresis dope slot and electrophoresis wastewater trough being arranged in parallel, the electrophoresis dope
It is marked with the electrophoresis liquid of leakage in slot, the flushing liquor generated in Zone electophoresis is marked in the electrophoresis wastewater trough.
Preferably: being equipped with fourth-order reaction area in the reactive tank, be successively arranged NaOH, lime in every grade of reaction zone
Cream, coagulant, anionic polyacrylamide.
Further: the coagulant is aluminium polychloride.
Further: being equipped with blender in every grade of reaction zone.
Preferably: the sludge treatment equipment includes the materialized mud slot and flame filter press being sequentially communicated.
A kind of painting dressing automobiles electrophoresis pretreatment method for wastewater, comprising the following steps:
(1) waste water containing electrophoresis liquid is successively subjected to level-one coagulating and level-one precipitation and separation, obtain level-one filtrate and
Level-one mud；The level-one filtrate is carried out two-stage coagulation reaction again to separate with two-stage precipitation, obtains second level filtrate and second level mud
Slurry；
(2) the second level filtrate is filtered, and adjusts the pH value of liquid.
Wherein, level-one precipitation and separation described in step (1) carries out in vertical sedimentation tank, and the two-stage precipitation separation is oblique
It is carried out in plate sedimentation basin.
Preferably: level-one coagulating described in step (1) is identical as the two-stage coagulation operation, is first to be added
NaOH reacts 10min or more；Then milk of lime is added, adjustment pH value is 10-11, and is stirred to react 10min or more；It adds mixed
Solidifying agent is stirred to react 15min or more；It is eventually adding anionic polyacrylamide and is stirred to react 15min or more.
Further: the additive amount of the NaOH is to reach 9.9-10.2 to the pH value of waste water containing electrophoresis liquid.
Preferably: the total duration of level-one coagulating described in step (1) and the total duration of the second order reaction are big
In 60min.
Preferably: the waste water containing electrophoresis liquid includes the flushing liquor that generates in the electrophoresis liquid and Zone electophoresis of leakage, institute
It states the electrophoresis liquid of the leakage flow in addition and is less than the 10% of electrophoresis elevator pump.
Preferably: filter-press dehydration processing is carried out after level-one mud described in step (1) and the second level mud are concentrated.
Preferably: being filtered into described in step (2) and be filtered using sandfiltration pot.
Compared with prior art, the invention has the following advantages:
Painting dressing automobiles electrophoresis waste water pretreatment system provided by the invention is mainly single by feed unit, reaction member, filtering
Member and PH adjustment unit composition, wherein reaction member includes the first order reaction unit and second order reaction unit being sequentially connected in series, thus
Waste water containing electrophoresis liquid can be classified to repeatedly processing, so as to a small amount of content of organics repeatedly removed in waste water, remove this
Except, the precipitation tank in first order reaction unit is perpendicular stream precipitation tank, and the precipitation tank in second order reaction unit is sloping plate deposition slot, is contained
There is the waste water of electrophoresis liquid after the electrophoresis reactive tank in first order reaction unit carries out coagulating, into vertical sedimentation tank, waste water
Vertical flowing is done from the top down, and water (flow) direction precipitates contrary, the catch speed of perpendicular stream precipitation tank and water flow rising with particle
Speed is equal, and the particle that the rate of climb is equal to sinking speed will be suspended in one layer of superposed layer of formation in mixed liquor, to of rising
Grain is intercepted and is filtered, and occupied area is small, and spoil disposal is easy, and realizes the thick precipitating to sediment most of in waste liquid；It is thick heavy
After the completion of shallow lake, then sloping plate deposition slot will be delivered to by the liquid overflowed in perpendicular stream precipitation tank, inclined-plate clarifying basin is with " shallow-layer is heavy
Form sediment " principle by the sedimentation basin between two pieces of inclined paralled plates every in inclined-plate clarifying basin makes the dirt of processed waste water and sedimentation
Mud is mutually moved and is separated in precipitating shallow-layer, realizes the fine separation to sediment in waste water, the two-stage reaction in the present invention
The setting of unit realizes the second coagulation precipitating to waste water, while to different precipitation tanks is arranged in every order reaction unit, sinking
Forming sediment, the time is short, and treatment effeciency is high, reduces electrophoresis Organic Pollutants in Wastewater content to the maximum extent, then cooperate electrophoresis at different levels anti-
The accurate control of coagulation process in slot to be answered, and then realizes the stably reaching standard discharge of wastewater treatment, this system process flow is simple,
Facilitate control, only need to control each unit parameter by system requirements, can ensure that electrophoresis waste water stable operation, draining concentration C OD is dense
Degree can be discharged after mixing with life water and carrying out biochemical treatment down to 1000mg/L, being capable of qualified discharge.
It is equipped with fourth-order reaction area in reactive tank in the present invention in each reaction member, is successively arranged in every order reaction area
NaOH, milk of lime, coagulant, anionic polyacrylamide, the reaction zone for being provided with NaOH can give up to containing electrophoresis liquid
Water carries out homogeneous average, while adjusting pH value for the first time；Reaction zone containing milk of lime can further adjust the pH value of waste water, from
And it is settled out phosphonium hydroxide lime stone precipitating, to remove the PO in waste water4-, in addition to this, lime is good demulsifier, so
When precipitate phosphoric acid salt, most of removal mainly can also be able to simultaneously with mineral oil existing for emulsifying in waste water；Contain coagulation
The reaction zone of agent and reaction zone containing PAM can increase the floccule of enhancing phosphonium hydroxide lime stone, convenient in sedimentation basin
It is separated by solid-liquid separation, improves removal efficiency.
Waste water containing electrophoresis liquid successively through two-stage reaction unit electrophoresis reactive tank and precipitation tank processing after, into filtering
Unit can further remove the SS in waste water, then reduce electricity to the maximum extent until PH is 6-9 by PH adjustment unit
Swim Organic Pollutants in Wastewater content, it is handled after waste liquid mixed with life water and carry out biochemical treatment after, can stablize and reach
Mark discharge.
Method of the invention is first added NaOH and reacts 10min or more in level-one coagulating and two-stage coagulation reaction,
To adjust basicity, determine that PH 10 or so, realizes good homogeneous even amount；Then milk of lime is added, adjustment pH value is 10-11,
And it is stirred to react 10min or more, to guarantee that waste liquid has the residence time suitable enough, precipitating is abundant；Add coagulant stirring
React 15min or more；It is eventually adding anionic polyacrylamide and is stirred to react 15min or more, sufficiently to flocculate, wherein the present invention
Level-one coagulating and two-stage coagulation reaction total duration be all larger than 60min, optimal reaction effect, maximum limit are obtained with this
The reduction electrophoresis Organic Pollutants in Wastewater content of degree, low energy consumption for preprocess method of the invention, investment and operating cost are few, can
Phosphorized waste water, electrophoresis waste water, waste liquid are handled, it is thorough to pollutant process, it can ensure that electrophoresis waste water stable operation, drain
Concentration C OD concentration can be down to 1000mg/L.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of the invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
As shown in Figure 1, the present invention provides a kind of painting dressing automobiles electrophoresis waste water pretreatment systems, including the confession being sequentially communicated
Material unit, reaction member, filter element and PH adjustment unit；Feed unit is to receive and accommodate the waste water containing electrophoresis liquid；
Reaction member includes the electrophoresis reactive tank and precipitation tank being sequentially communicated, precipitation tank include liquid discharge outlet and mud discharging mouth (not
Identified in figure, dotted line is sludge flow direction in figure, and solid line is filtrate flow direction), liquid discharge outlet is connected with filter element, sludge
Sludge treatment equipment is equipped at discharge outlet；Wherein, the first order reaction unit being respectively sequentially connected in series there are two reaction members and two
Order reaction unit, the precipitation tank in first order reaction unit are perpendicular stream precipitation tank, and the precipitation tank in second order reaction unit is heavy for inclined plate
Shallow lake slot.
Painting dressing automobiles electrophoresis waste water pretreatment system provided by the invention is mainly single by feed unit, reaction member, filtering
Member and PH adjustment unit composition, wherein reaction member includes the first order reaction unit and second order reaction unit being sequentially connected in series, thus
Waste water containing electrophoresis liquid can be classified to repeatedly processing, so as to a small amount of content of organics repeatedly removed in waste water, remove this
Except, the precipitation tank in first order reaction unit is perpendicular stream precipitation tank, and the precipitation tank in second order reaction unit is sloping plate deposition slot, is contained
There is the waste water of electrophoresis liquid after the electrophoresis reactive tank in first order reaction unit carries out coagulating, into vertical sedimentation tank, waste water
Vertical flowing is done from the top down, and water (flow) direction precipitates contrary, the catch speed of perpendicular stream precipitation tank and water flow rising with particle
Speed is equal, and the particle that the rate of climb is equal to sinking speed will be suspended in one layer of superposed layer of formation in mixed liquor, to of rising
Grain is intercepted and is filtered, and occupied area is small, and spoil disposal is easy, and realizes the thick precipitating to sediment most of in waste liquid；It is thick heavy
After the completion of shallow lake, then sloping plate deposition slot will be delivered to by the liquid overflowed in perpendicular stream precipitation tank, inclined-plate clarifying basin is with " shallow-layer is heavy
Form sediment " principle by the sedimentation basin between two pieces of inclined paralled plates every in inclined-plate clarifying basin makes the dirt of processed waste water and sedimentation
Mud is mutually moved and is separated in precipitating shallow-layer, realizes the fine separation to sediment in waste water, the two-stage reaction in the present invention
The setting of unit realizes the second coagulation precipitating to waste water, while to different precipitation tanks is arranged in every order reaction unit, sinking
Forming sediment, the time is short, and treatment effeciency is high, reduces electrophoresis Organic Pollutants in Wastewater content to the maximum extent, then cooperate electrophoresis at different levels anti-
The accurate control of coagulation process in slot to be answered, and then realizes the stably reaching standard discharge of wastewater treatment, this system process flow is simple,
Facilitate control, only need to control each unit parameter by system requirements, can ensure that electrophoresis waste water stable operation, draining concentration C OD is dense
Degree can be discharged after mixing with life water and carrying out biochemical treatment down to 1000mg/L, being capable of qualified discharge.
Wherein, as being preferably embodiment, feed unit includes the electrophoresis dope slot and electrophoresis wastewater trough being arranged in parallel,
It is marked with the electrophoresis liquid of leakage in electrophoresis dope slot, the flushing liquor generated in Zone electophoresis is marked in electrophoresis wastewater trough.In this way, being fed
When, the two is individually perfused, and is independent of each other, and in the electrophoresis liquid of perfusion leakage, flow is less than the 10% of electrophoresis elevator pump, supplies certainly
Material unit may be one, the flushing liquor mixed injection reaction member that will directly generate in the electrophoresis liquid of leakage and Zone electophoresis,
But may there are problems that reducing treatment effeciency.
It is equipped with fourth-order reaction area in reactive tank of the invention, is successively arranged NaOH, milk of lime, coagulation in every order reaction area
Agent, anionic polyacrylamide, coagulant are aluminium polychloride, and are respectively provided with blender in every order reaction area, such as
This, the reaction zone equipped with NaOH can carry out homogeneous average to the waste water containing electrophoresis liquid, while adjust pH value for the first time；Contain stone
The reaction zone of grey cream can further adjust the pH value of waste water, so that phosphonium hydroxide lime stone precipitating is settled out, to remove in waste water
PO4-, in addition to this, lime is good demulsifier, so in precipitate phosphoric acid salt, in waste water mainly existing for emulsifying
Mineral oil can also be able to most of removal simultaneously；Reaction zone containing coagulant and the reaction zone containing PAM can increase
Enhance the floccule of phosphonium hydroxide lime stone, convenient for being separated by solid-liquid separation in sedimentation basin, improves removal efficiency.
Electrophoresis reactive tank and precipitation tank through above-mentioned two-stage reaction unit treated waste water can be into filter element
One step removes the SS in waste water, is then reduced in electrophoresis waste water to the maximum extent by PH adjustment unit until PH is 6-9
Organic pollutant content, it is handled after waste liquid mixed with life water and carry out biochemical treatment after, can stably reaching standard discharge.And
Through perpendicular stream precipitation tank treated sludge and through sloping plate deposition slot, treated that sludge can first be collected into materialized mud slot, warp
It is dehydrated after concentration with sludge pumping to plate and frame filter press, dry mud outward transport, row, sludge-tank supernatant and sheet frame pressure under filtered water tank upper liquid
The pressing filtering liquid of filter is back to circular treatment in the electrophoresis reactive tank in reaction member.
Embodiment 2
The present invention provides a kind of painting dressing automobiles electrophoresis pretreatment method for wastewater, this method is carried out based on above system, packet
Include following steps:
(1) level-one coagulating
Will the phosphorized waste water as caused by a vapour-masses Foshan factory second phase coating waste water station (electrophoresis average COD of intaking is
NaOH 3300mg/L) is added to pH value up to 9.9, and reacts 10min；Then milk of lime is added, adjustment pH value is 10, and is stirred anti-
Answer 10min；It adds aluminium polychloride and is stirred to react 15min；It is eventually adding anionic polyacrylamide and is stirred to react 15min,
Obtain coagulation liquid；
(2) level-one precipitation and separation
Coagulation liquid is injected and carries out level-one precipitation and separation in vertical sedimentation tank, obtains level-one filtrate and level-one mud, one
Filter-press dehydration processing is carried out after grade mud is concentrated；
(3) two-stage coagulation reacts
NaOH is added to pH value up to 9.9 in level-one filtrate, and reacts 10min；Then milk of lime is added, adjustment pH value is
10, and it is stirred to react 10min；It adds coagulant and is stirred to react 15min；Anionic polyacrylamide is eventually adding to be stirred to react
15min obtains two stage treatment liquid；
(4) two-stage precipitation separates
Two stage treatment liquid is injected and carries out two-stage precipitation separation in vertical sedimentation tank, obtains second level filtrate and second level mud, two
Filter-press dehydration processing is carried out after grade mud is concentrated；
(5) acid is adjusted in filtering
Second level filtrate is filtered using sandfiltration pot, and adjusts the pH value of liquid to 6, concentration is drained through detection
COD concentration is 1000mg/L.
Embodiment 3
The present invention provides a kind of painting dressing automobiles electrophoresis pretreatment method for wastewater, this method is carried out based on above system, packet
Include following steps:
(1) level-one coagulating
The flushing liquor generated in Zone electophoresis in the plant chimney stalk station of Tianjin (electrophoresis line averagely intake 1800mg/L) is added
NaOH reacts 15min to pH value up to 10.5；Then milk of lime is added, adjustment pH value is 10.5, and is stirred to react 15min；Again
Aluminium polychloride is added and is stirred to react 15min；It is eventually adding anionic polyacrylamide and is stirred to react 15min, obtain coagulation
Liquid；
(2) level-one precipitation and separation
Coagulation liquid is injected and carries out level-one precipitation and separation in vertical sedimentation tank, obtains level-one filtrate and level-one mud, one
Filter-press dehydration processing is carried out after grade mud is concentrated；
(3) two-stage coagulation reacts
NaOH is added to pH value up to 10 in level-one filtrate, and reacts 15min；Then milk of lime is added, adjustment pH value is
10.5, and it is stirred to react 15min；It adds aluminium polychloride and is stirred to react 15min；Anionic polyacrylamide is eventually adding to stir
Reaction 15min is mixed, two stage treatment liquid is obtained；
(4) two-stage precipitation separates
Two stage treatment liquid is injected and carries out two-stage precipitation separation in vertical sedimentation tank, obtains second level filtrate and second level mud, two
Filter-press dehydration processing is carried out after grade mud is concentrated；
(5) acid is adjusted in filtering
Second level filtrate is filtered using sandfiltration pot, and adjusts the pH value of liquid to 7, concentration is drained through detection
COD concentration is 960mg/L.
Embodiment 4
The present invention provides a kind of painting dressing automobiles electrophoresis pretreatment method for wastewater, this method is carried out based on above system, packet
Include following steps:
(1) level-one coagulating
By the flushing liquor generated in the electrophoresis liquid of leakage caused by the plant chimney stalk station of Qingdao and Zone electophoresis, (electrophoresis line is flat
Water inlet is 1800mg/L) NaOH is added to pH value up to 10.2, and react 13min；Then milk of lime is added, adjustment pH value is
11, and it is stirred to react 17min；It adds aluminium polychloride and is stirred to react 16min；It is eventually adding anionic polyacrylamide stirring
18min is reacted, coagulation liquid is obtained；
(2) level-one precipitation and separation
Coagulation liquid is injected and carries out level-one precipitation and separation in vertical sedimentation tank, obtains level-one filtrate and level-one mud, one
Filter-press dehydration processing is carried out after grade mud is concentrated；
(3) two-stage coagulation reacts
NaOH is added to pH value up to 10.2 in level-one filtrate, and reacts 13min；Then milk of lime is added, adjustment pH value is
11, and it is stirred to react 17min；It adds coagulant and is stirred to react 16min；Anionic polyacrylamide is eventually adding to be stirred to react
18min obtains two stage treatment liquid；
(4) two-stage precipitation separates
Two stage treatment liquid is injected and carries out two-stage precipitation separation in vertical sedimentation tank, obtains second level filtrate and second level mud, two
Filter-press dehydration processing is carried out after grade mud is concentrated；
(5) acid is adjusted in filtering
Second level filtrate is filtered using sandfiltration pot, and adjusts the pH value of liquid to 9, concentration is drained through detection
COD concentration is 920mg/L.
The foregoing is merely a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (10)
1. a kind of painting dressing automobiles electrophoresis waste water pretreatment system, which is characterized in that including feed unit, the reaction list being sequentially communicated
Member, filter element and PH adjustment unit；
The feed unit is to receive and accommodate the waste water containing electrophoresis liquid；
The reaction member includes the electrophoresis reactive tank and precipitation tank being sequentially communicated, and the precipitation tank includes liquid discharge outlet and dirt
Mud discharge outlet, the liquid discharge outlet are connected with the filter element, and sludge treatment equipment is equipped at the mud discharging mouth；
Wherein, there are two the reaction members, the first order reaction unit and second order reaction unit being respectively sequentially connected in series, described one
Precipitation tank in order reaction unit is perpendicular stream precipitation tank, and the precipitation tank in the second order reaction unit is sloping plate deposition slot.
2. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 1, which is characterized in that the feed unit packet
The electrophoresis dope slot and electrophoresis wastewater trough being arranged in parallel are included, the electrophoresis liquid of leakage, the electrophoresis are marked in the electrophoresis dope slot
The flushing liquor generated in Zone electophoresis is marked in wastewater trough.
3. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 1, which is characterized in that set in the reactive tank
There is fourth-order reaction area, is successively arranged NaOH, milk of lime, coagulant, anionic polyacrylamide in every grade of reaction zone.
4. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 3, which is characterized in that the coagulant is poly-
Close aluminium chloride.
5. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 3, which is characterized in that every grade of reaction zone
Inside it is equipped with blender.
6. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 1, which is characterized in that the Treatment of Sludge dress
It sets including the materialized mud slot being sequentially communicated and flame filter press.
7. a kind of painting dressing automobiles electrophoresis pretreatment method for wastewater, which comprises the following steps:
(1) waste water containing electrophoresis liquid is successively subjected to level-one coagulating and level-one precipitation and separation, obtains level-one filtrate and level-one
Mud；The level-one filtrate is carried out two-stage coagulation reaction again to separate with two-stage precipitation, obtains second level filtrate and second level mud；
(2) the second level filtrate is filtered, and adjusts the pH value of liquid.
Wherein, level-one precipitation and separation described in step (1) carries out in vertical sedimentation tank, and the two-stage precipitation separation is heavy in inclined plate
It is carried out in the pond of shallow lake.
8. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 7, which is characterized in that described in step (1)
Level-one coagulating is identical as the two-stage coagulation operation, is that NaOH reaction 10min or more is first added；Then stone is added
Grey cream, adjustment pH value is 10-11, and is stirred to react 10min or more；It adds coagulant and is stirred to react 15min or more；Finally plus
Enter anionic polyacrylamide and is stirred to react 15min or more.
9. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 8, which is characterized in that the addition of the NaOH
Amount reaches 9.9-10.2 for the pH value of waste water containing electrophoresis liquid described in.
10. painting dressing automobiles electrophoresis waste water pretreatment system according to claim 7, which is characterized in that described in step (1)
The total duration of the total duration of level-one coagulating and the second order reaction is all larger than 60min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110937726A (en) * | 2019-12-25 | 2020-03-31 | 常州千帆环保科技有限公司 | Pretreatment method of high-COD-concentration electrophoretic painting waste liquid |
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| CN103043828A (en) * | 2013-01-03 | 2013-04-17 | 江苏新裕泰华环保有限公司 | System and method for treating high-concentration waste liquid |
| CN103274567A (en) * | 2013-05-27 | 2013-09-04 | 天津市环境保护科学研究院 | Device and method for treating electrophoretic coating waste water |
| CN104909490A (en) * | 2015-05-19 | 2015-09-16 | 东风活塞轴瓦有限公司 | Phosphating and chemical nickel-plating mixed comprehensive wastewater treatment process and automated device |
Cited By (1)
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| CN110937726A (en) * | 2019-12-25 | 2020-03-31 | 常州千帆环保科技有限公司 | Pretreatment method of high-COD-concentration electrophoretic painting waste liquid |
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