CN109205824A - The processing system of aqueous paint waste water and the processing method for using the processing system - Google Patents
The processing system of aqueous paint waste water and the processing method for using the processing system Download PDFInfo
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- CN109205824A CN109205824A CN201710548023.XA CN201710548023A CN109205824A CN 109205824 A CN109205824 A CN 109205824A CN 201710548023 A CN201710548023 A CN 201710548023A CN 109205824 A CN109205824 A CN 109205824A
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- waste water
- paint
- slag
- processing system
- paint slag
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- 239000003973 paint Substances 0.000 title claims abstract description 135
- 239000002351 wastewater Substances 0.000 title claims abstract description 113
- 238000012545 processing Methods 0.000 title claims abstract description 49
- 238000003672 processing method Methods 0.000 title claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 131
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 230000003750 conditioning effect Effects 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000000926 separation method Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 239000003814 drug Substances 0.000 claims abstract description 22
- 230000003197 catalytic effect Effects 0.000 claims abstract description 19
- 238000005352 clarification Methods 0.000 claims abstract description 4
- 125000002091 cationic group Chemical group 0.000 claims description 19
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 238000010907 mechanical stirring Methods 0.000 claims description 7
- 238000004220 aggregation Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229940079593 drug Drugs 0.000 claims description 4
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- 230000001351 cycling effect Effects 0.000 abstract description 6
- 238000010790 dilution Methods 0.000 abstract description 3
- 239000012895 dilution Substances 0.000 abstract description 3
- 238000005188 flotation Methods 0.000 abstract description 2
- 229920002401 polyacrylamide Polymers 0.000 description 25
- 239000000243 solution Substances 0.000 description 19
- 238000005189 flocculation Methods 0.000 description 12
- 230000016615 flocculation Effects 0.000 description 12
- 241000196324 Embryophyta Species 0.000 description 10
- 239000003513 alkali Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 238000004065 wastewater treatment Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000003311 flocculating effect Effects 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 210000001742 aqueous humor Anatomy 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000007592 spray painting technique Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention provides a kind of processing system of aqueous paint waste water and use the processing method of the processing system.Processing method includes the following steps: S1, and aqueous slkali is added in the aqueous paint waste water containing paint slag and carries out PH adjusting, adjusts waste water to alkalinity；S2, catalyst is added into the waste water after PH adjusting, and full and uniform mixing obtains the waste water of paint slag catalytic pretreatment；S3 adds flocculant into the waste water of the paint slag catalytic pretreatment, full and uniform to mix the paint slag mixture for occurring largely agglomerating into waste water, and water quality becomes clarification；Waste water after the paint slag cohesion is carried out air-flotation process, separates clear water and the paint slag mixture by S4.Processing system includes being sequentially communicated and being tightly connected PH conditioning tank and Reaction Separation system and medicine system.The present invention is able to carry out continuous and automatic and handles aqueous paint waste water, and processing capacity is high, and treated clear water effluent color dilution is less than 80 times, and suspended matter is less than 100mg/L, and waste water can continue cycling through use.
Description
Technical field
The present invention relates to technical field of waste water processing, and relate more specifically to a kind of processing system of aqueous paint waste water and make
With the processing method of the processing system.
Background technique
Due to the feature of environmental protection of water-based paint, container spraying becomes main trend using water-based paint.Container spraying is adopted
It is independently carried out with modernization automatic spraying equipment in closed paint spray booth, and is equipped with circulation water-screen cabinet except over-sprayed paint fog system.One
As in the case of, over-sprayed paint fog reaches the 40% of total spray painting amount, and wherein the over-sprayed paint fog of about half is by circulation cascade paint removal mist system
Absorption.Other industry is compared in container spraying, and spray painting amount is huge.The recirculated water of a large amount of coating clouds fast acid in collecting pit is adsorbed
Change, about three day time, its pH value was reduced to 4.5 or so, and cascade recirculated water containing paint slag amount is especially high, need to change water often to shadow
Ring the continuity of production.
But in the prior art, what the processing method of paint waste water was more is the method for cleaning of oiliness paint waste water paint slag,
It is less for the Study on processing method of water-based paint waste water, and due to the distinctive water solubility of water-based paint, so that former oiliness
Paint waste water paint slag method for cleaning may not apply to water-based paint waste water.
Therefore, it is necessary to the processing systems and processing method of a kind of aqueous paint waste water, at least to be partially solved the prior art
The problem of.
Summary of the invention
A series of concept of reduced forms is introduced in Summary, this will in the detailed description section into
One step is described in detail.Summary of the invention is not meant to attempt to limit technical solution claimed
Key feature and essential features do not mean that the protection scope for attempting to determine technical solution claimed more.
In order to overcome the shortcomings of the prior art, according to the first aspect of the invention, providing a kind of aqueous paint waste water
Processing system, which includes PH conditioning tank, Reaction Separation system and medicine system.
PH conditioning tank is for adjusting aqueous paint waste water to alkalinity.
Reaction Separation system reacts mixed to generate paint slag for mixing catalyst and flocculant uniformly with waste water
Close object and separate the paint slag mixture, the Reaction Separation system be located at the downstream of the PH conditioning tank and with the PH tune
Section pond is connected to and is tightly connected.
Medicine system is used to add aqueous slkali into the PH conditioning tank and add into the Reaction Separation system flocculation
Agent, the medicine system and the PH conditioning tank and the Reaction Separation system connectivity are simultaneously tightly connected.
Wherein, the medicine system is provided with the flow control of the inventory for controlling the aqueous slkali and the flocculant
Device processed.
According to this programme, which is able to carry out continuous and automatic and handles aqueous paint waste water, improves the processing of paint slag
Efficiency, processing capacity are high.Less than 80 times, suspended matter is less than 100mg/L for the clear water effluent color dilution that enables to that treated, and can be with
Continue cycling through use.
Preferably, the flocculant is cationic PAM solution.Thereby, it is possible to make the effect for painting slag cohesion more excellent, obtain
The clear water coloration arrived is smaller.
Preferably, the mass concentration of the cationic PAM solution is 1 ‰~2 ‰ and inventory is the matter of the waste water
The inventory for measuring PAM solute in 1%~2% or the cationic PAM solution of content is that the quality of slag is painted in the waste water
The 2 ‰ of content~5 ‰.Thus, it is possible to make the flocculating result that can have reached, and energy by the inventory for controlling catalyst
Enough reduce reagent cost.
Preferably, the Reaction Separation system includes mixing pit and reacting and separating device, and mixing pit is pre- for be catalyzed
Treatment process, the mixing pit are connected to and are tightly connected with the PH conditioning tank；Reacting and separating device is for being condensed reaction
With separating treatment process, the reacting and separating device is located at the downstream of the mixing pit, and is connected to and seals with the mixing pit
Connection.
According to this programme, Reaction Separation system is arranged to two parts, so that carrying out being catalyzed in different containers respectively pre-
Treatment process and coacervation process, so as to realize the continuous processing of high-volume waste water.
Preferably, the Reaction Separation system includes reacting and separating device, for carrying out catalytic pretreatment process, cohesion instead
It should be with separating treatment process.Thus, it is possible to be carried out at catalytic pretreatment process, aggregation and separation in reacting and separating device
Reason process.
Preferably, in the PH conditioning tank, the pH value of aqueous paint waste water is adjusted to 8~9.Thereby, it is possible to be subsequent paint
Slag cohesion provides more preferably environmental condition.
Preferably, the catalyst is plant drymeal or aluminium/ferric inorganic salt.Thereby, it is possible to preferably make with flocculant
With and make paint slag cohesion and separate.
Preferably, the inventory of the catalyst is 4%~6% of the mass content of paint slag in the waste water.As a result, may be used
With by the inventory for controlling catalyst make can either enough condensation nucleus, and can reduce reagent cost.
Preferably, the partial size of the plant drymeal is less than or equal to 0.5mm.Thereby, it is possible to preferably be that subsequent paint slag is solidifying
It is poly- that uniform and stable condensation nucleus is provided.
Preferably, further include for being carried out dehydrating the paint slag mixture by separating treatment slag mud dehydration system
System.Paint slag mixture reduces moisture content after being further processed as a result, enables the standard for reaching advanced treating.
Preferably, the PH conditioning tank, the mixing pit, the reacting and separating device and the medicine system are respectively set
There is mechanical stirring device.Thereby, it is possible to improve uniform mixability, avoid generating a large amount of foam because of mixing.
According to the second aspect of the invention, a kind of processing method of aqueous paint waste water is provided, is included the following steps:
S1 is added aqueous slkali in the aqueous paint waste water containing paint slag and carries out PH adjusting, adjusts waste water to alkalinity；
S2, catalyst is added into the waste water after PH adjusting, and full and uniform mixing is obtained by paint slag catalytic pretreatment
Waste water；
S3 passes through in the waste water of paint slag catalytic pretreatment into above-mentioned steps and adds flocculant, full and uniform to mix to useless
Occurs the paint slag mixture largely agglomerated in water, and water quality becomes clarification；And
S4 the waste water after paint slag agglomerates will occurs and carry out separating treatment, separates clear water and the paint slag is mixed in above-mentioned steps
Close object.
According to this programme, PH is adjusted to subsequent paint slag cohesion and provides the environmental condition of alkalinity, and the addition of catalyst can
Enough condensation nucleus are provided for the cohesion of subsequent paint slag, guarantee that paint slag cohesion reaches more preferably effect.Effect of the waste water in flocculant
Lower a large amount of cohesion, finally isolates paint slag impurity after being separated by solid-liquid separation from waste water.It is useless using water paint provided by the invention
The processing method of water is able to carry out continuous and automatic and handles aqueous paint waste water, and processing capacity is high, treated clear water effluent color dilution
Less than 80 times, suspended matter is less than 100mg/L, and waste water can continue cycling through use；The paint slag moisture content about 70% of cleaning, at waste water
It manages cost and is lower than 2 yuan/ton.
Preferably, in the step S1, the pH value of the aqueous paint waste water is adjusted to 8~9.Thereby, it is possible to be subsequent
It paints slag cohesion and more preferably environmental condition is provided.
Preferably, in the step S3, the flocculant is cationic PAM solution.Thereby, it is possible to make paint slag solidifying
Poly- effect is more excellent, and obtained clear water coloration is smaller.
Preferably, the mass concentration of the cationic PAM solution is 1 ‰~2 ‰ and inventory is the matter of the waste water
The inventory for measuring PAM solute in 1%~2% or the cationic PAM solution of content is that the quality of slag is painted in the waste water
The 2 ‰ of content~5 ‰.Thus, it is possible to make the flocculating result that can have reached, and energy by the inventory for controlling catalyst
Enough reduce reagent cost.
Preferably, in the S2 step, the catalyst is plant drymeal or aluminium/ferric inorganic salt.Thereby, it is possible to
Flocculant preferably acts on and makes to paint slag cohesion and separate.
Preferably, the partial size of the plant drymeal is less than or equal to 0.5mm.Thereby, it is possible to preferably be that subsequent paint slag is solidifying
It is poly- that uniform and stable condensation nucleus is provided.
Preferably, in the S2 step, the inventory of the catalyst is that the mass content of slag is painted in the waste water
4%~6%.Thus, it is possible to by the inventory for controlling catalyst make can either enough condensation nucleus, and can reduce medicament
Cost.
Preferably, the wastewater treatment method is continuous processing technique, further includes step S5, described in after separating treatment
Paint slag mixture is carried out dehydrating, and obtains clear water and slag mud.Paint slag mixture reduces aqueous after being further processed as a result,
Rate enables the standard for reaching advanced treating.
Preferably, in the step S5, after the dehydration, it is continually fed into the compressed air of preset time, so
After unload scaling-off mud.Paint slag mixture can be handled further as a result, to reach the processing standard of postorder as defined in slag mud.
Detailed description of the invention
Following drawings of the invention is incorporated herein as part of the present invention for the purpose of understanding the present invention.Shown in the drawings of this hair
Bright embodiment and its description, device used to explain the present invention and principle.In the accompanying drawings,
Fig. 1 is the flow chart according to the processing method of the aqueous paint waste water of the preferred embodiment of the present invention；
Fig. 2 is the structure chart according to the processing system of the aqueous paint waste water of the preferred embodiment of the present invention.
Attached drawing mark
1, wastewater collection pond 2, sewage pump 3, PH conditioning tank
4, mixing pit 5, medicine system 51, alkali liquid tank
52, flocculant tank 53, volume control device 6, batch charger
7, reacting and separating device 71, flocculation basin 72, Slag Scraping Device
8, slag mud dewatering system 81, slag mud sump 82, transport pump
83, slag mud dewaterer 84, slag mud collecting box 9, clear water reserviors
91, water pump 10, mechanical stirring device
Specific embodiment
In the following description, a large amount of concrete details are given so as to provide a more thorough understanding of the present invention.So
And it is obvious to the skilled person that the present invention may not need one or more of these details and be able to
Implement.In other examples, in order to avoid confusion with the present invention, for some technical characteristics well known in the art not into
Row description.
In order to thoroughly understand the present invention, detailed structure will be proposed in following description, to illustrate the present invention.It is aobvious
So, execution of the invention is not limited to the specific details that the those skilled in the art are familiar with.Preferable reality of the invention
Example is applied to be described in detail as follows, however other than these detailed descriptions, the present invention can also have other embodiments, should not solve
It is interpreted as being confined to embodiments presented herein.
It should be understood that the purpose of term as used herein is only that description specific embodiment and not as the present invention
Limitation, " one " of singular "one" and " described/should " be also intended to include plural form, unless the context clearly indicates separately
Outer mode.When the term " comprising " and/or " including " is used in this specification, indicate that there are the feature, entirety, steps
Suddenly, operation, element and/or component, but do not preclude the presence or addition of one or more other features, entirety, step, operation, member
Part, component and/or their combination.Term " on " used in the present invention, "lower", "front", "rear", "left", "right" and
Similar statement for illustrative purposes only, not limits.
The cited such as ordinal number of " first " and " second " is only to identify in the present invention, without any other
Meaning, such as specific sequence etc..Moreover, for example, term " first component " itself does not imply that the presence of " second component ", art
Language " second component " does not imply that the presence of " first component " in itself.
Hereinafter, specific embodiments of the present invention are described in more detail with reference to the accompanying drawings, those figures show this
The representative embodiment of invention is not to limit the present invention.
According to the first aspect of the invention, a kind of processing method of aqueous paint waste water is provided, as shown in Figure 1, the processing
Method consists essentially of five steps, is respectively:
Step S1, PH are adjusted, and aqueous slkali is added in the aqueous paint waste water containing paint slag and carries out PH adjusting, adjust waste water to
Alkalinity.
Step S2, catalytic pretreatment add catalyst in the waste water after adjusting to PH, full and uniform mixing, obtain by
Paint the waste water of slag catalytic pretreatment.
Step S3, aggregation pass through in the waste water of paint slag catalytic pretreatment into above-mentioned steps and add flocculant, sufficiently
The paint slag mixture for occurring largely agglomerating into waste water is uniformly mixed, and water quality becomes clarification.
Step S4, separating treatment the waste water after paint slag agglomerates will occur and carry out separating treatment, separate clear water in above-mentioned steps
With paint slag mixture.
Paint slag mixture after separating treatment is carried out dehydrating, obtains clear water and slag mud by step S5, dehydration.
In above-mentioned steps, it should be noted that step S5 is of the invention to be preferably further processed step.
Preferably due to therefore aqueous paint waste water, in step sl, needs to adjust water before treatment substantially in acidity
The pH value of property paint waste water, pH value is preferably 8~9, to provide the environmental condition that can be agglomerated for subsequent step.Alkali soluble used
Liquid is generally formulated by solid base, and solid base can be the bases such as sodium hydroxide, sodium carbonate, calcium carbonate.What is be configured to is dense
Degree can be 3%~10%, and the present invention preferably adjusts the common piece alkali medicament of waste water PH in the market, be configured to the alkali of 3% concentration
Solution.It should be noted that the present invention select piece alkali medicament be by repeatedly attempting, and in conjunction with subsequent step treatment effect and
It obtains.
In order to guarantee after adding flocculant in waste water, paint slag cohesion reaches more preferably effect, and the present invention is to useless
Before adding flocculant in water, it is added to catalyst into waste water particularly to carry out catalytic pretreatment, which can be
Subsequent paint slag cohesion provides enough condensation nucleus.Catalyst can be plant drymeal or inorganic salts.Plant drymeal be generally timber,
The dust that bamboo wood, reed, stalk etc. recycle when processing, partial size are preferably less than or equal to 0.5mm, if the dry powder partial size of recycling
Greater than 0.5mm, then need to carry out Screening Treatment.The aluminium such as inorganic salts preferably aluminum sulfate, aluminium polychloride, ferrous sulfate/
Ferric inorganic salt.
Preferably, in S2 step, the inventory of catalyst is 4%~6% of the mass content of paint slag in waste water, preferably
It is 5%.It should be noted that actual interpolation process is generally according to warp since wastewater treatment process is usually continuous operation process
It tests, gradually adds.Specifically, judged according to the cloudiness of purified waste water, without to the paint quantity of slag in waste water into
Row quantitative determination.After adding to a certain extent, water quality reaches peak, continues to add, and water quality will not have clear improvement, but at
This can be obviously increased, and can cause the increased costs of subsequent cationic solution, and therefore, it is necessary to feeding intake for Cautious control catalyst
Amount.
Preferably, in step s3, flocculant can be cationic-type polyacrylamide (PAM), anionic PAM, non-
The macromolecule water treatment flocculants such as ionic PAM, the present invention are preferably cationic-type polyacrylamide (PAM) solution.Cation
The mass concentration of type PAM solution is preferably 1 ‰~2 ‰.The inventory of cationic PAM solution is the mass content of waste water
1%~2% or cationic PAM solution in PAM solute inventory be waste water in paint slag mass content 2 ‰~5 ‰.This
Place is it should be noted that the inventory of above-mentioned flocculant is with obtained from certain wastewater treatment capacity, in actual mechanical process
In, since wastewater treatment process is usually continuous operation process, flocculant can not also using it is above-mentioned it is quantitative by the way of,
And by the way of the state for gradually adding and observing paint slag cohesion.But according to the latter, needs to control inventory and reach meat
Eye observes that a large amount of bulks or sheet alumen ustum (diameter is about 3~5mm) occur and water quality becomes limpid degree.Due to working as flocculant
After addition to a certain extent, water quality reaches peak, and processing cost can be dramatically increased by continuing addition, and will cause paint slag viscosity mistake
Greatly, the dehydration of subsequent paint slag is influenced, therefore, it is necessary to the inventorys of Cautious control flocculant.
Cationic PAM solution of the invention be prepared using the common cationic PAM solid of sewage treatment in the market and
At, since cationic PAM solid phase is more lower than in other painting wastewaters processing special agent price, so that medicament of the invention
50% or more cost decline.
In order to obtain uniform flocculating effect, makes to paint slag and agglomerate to the greatest extent, the aqueous slkali that is added into waste water, plant
Dry powder/inorganic salts and cationic PAM solution require uniformly to be mixed with waste water.Hybrid mode of the invention is preferably machine
The mode of tool stirring, other agitating modes such as air stirring are easy to appear a large amount of foams.
Separating treatment process of the invention is useless after handling paint slag cohesion using the method for air-flotation process or sloping plate deposition
Water, to isolate clear water and paint slag mixture.Since the separation method occupied area of sloping plate deposition is larger, the present invention is preferably gas
Floating processing.
Further, since the moisture content of paint slag mixture is higher, above-mentioned paint slag mixture is dehydrated by the present invention
Processing is collected dewatered slag mud and is transported to defined processing department to carry out dangerous waste processing.Preferably, more preferable in order to obtain
Dehydrating effect be continually fed into the compressed air of preset time (typically about 4 hours or more) after dehydration, then unload
Scaling-off mud, can substantially reduce the moisture content of slag mud, and moisture content can reach 65%~70%.
In order to save water cost, the present invention can be delivered to spray painting by the clear water that separating treatment and dehydration obtain
Workshop continues cycling through use, and accomplishes zero-emission substantially, meets the environmental requirement of national energy conservation and emission reduction.If dehydration obtains
Be concentrated water, wastewater collection can be delivered to, handled again.
After a period of time is recycled in waste water (generally 2 months, determined by production line output), maintenance or production are utilized
The waste water for the aqueous humor pond that paints all is evacuated to conditioning tank by the time of having a rest, and then (air bearing) water outlet passes through conveying after pretreatment
Pipeline is discharged into plant area's composite wastewater treating stations and carries out advanced treating, handles rear discharge up to standard.Aqueous humor pond supplement of painting is new originally
It can be continued to use after water.
Normal circulation in use, because of evaporation, slag mud is aqueous and other reasons, will lead to paint spray booth water level in water pool it is continuous under
Drop, therefore part of running water need to be supplemented to paint aqueous humor pond according to the actual situation.
According to the second aspect of the invention, a kind of processing system of aqueous paint waste water is provided, for realizing above-mentioned skill
Processing method in art scheme.
As shown in Fig. 2, the processing system of aqueous paint waste water includes PH conditioning tank 3, Reaction Separation system (4 and/or 7) and adds
Medicine system 5.PH conditioning tank 3 is for adjusting aqueous paint waste water to alkalinity.Reaction Separation system (4 and/or 7) is for successively making to be catalyzed
Agent and flocculant are uniformly mixed with waste water and are reacted to generate paint slag mixture and separate the paint slag mixture, Reaction Separation
System (4 and/or 7) is located at the downstream of PH conditioning tank 3 and is connected to and is tightly connected with PH conditioning tank 3.Medicine system 5 is used for PH
Aqueous slkali is added in conditioning tank 3 and flocculant, medicine system 5 and PH conditioning tank 3 are added into Reaction Separation system (4 and/or 7)
It is connected to and is tightly connected with Reaction Separation system (4 and/or 7).
Further, Reaction Separation system (4 and/or 7) includes mixing pit 4 and reacting and separating device 7, and mixing pit 4 is used for
Catalytic pretreatment process is carried out, mixing pit 4 is connected to and is tightly connected with PH conditioning tank 3；Reacting and separating device 7 is for being condensed
Reaction and separating treatment process.
Specifically, as shown in Fig. 2, the processing system preferably include the wastewater collection pond 1 for being sequentially communicated and being tightly connected,
Sewage pump 2, PH conditioning tank 3, mixing pit 4 and reacting and separating device 7 and medicine system 5.Wherein, reacting and separating device 7
With flocculation basin 71, to be condensed reaction.The flocculation basin 71 of the medicine system 5 and PH conditioning tank 3 and reacting and separating device 7 connects
Lead to and is tightly connected.
It is preferable to provide it should be noted that mixing pit 4 is one, setting mixing pit 4 can also not had to, directly reacted
Catalytic pretreatment is carried out in separation equipment 7.That is Reaction Separation system (4 and/or 7) can only include reacting and separating device
7.Specifically, by the flocculation basin 71 of catalyst transport to reacting and separating device 7, catalytic pretreatment is first carried out, then flocculant is defeated
It send to the flocculation basin 71 of reacting and separating device 7, carries out paint slag aggregation.That is reacting and separating device 7 can at this time
As catalytic pretreatment container, and it can be used as paint slag aggregation container and paint slag mixture and clear water separation vessel.
Preferably, PH conditioning tank 3, mixing pit 4, reacting and separating device 7 and medicine system 5 are respectively arranged with mechanical stirring dress
10 are set, so that respectively the substance in equipment carries out mechanical stirring and uniformly mixes.
It is provided with sewage pump 2 between wastewater collection pond 1 and PH conditioning tank 3, waste water in the pond is delivered to PH tune
Save pond 3.PH conditioning tank 3 and mixing pit 4 are arranged so that waste water can flow to certainly mixing pit 4 from PH conditioning tank 3.4 He of mixing pit
Reacting and separating device 7 is arranged so that waste water can flow to certainly the flocculation basin 71 of reacting and separating device 7 from mixing pit 4.
Further, which further includes the batch charger 6 for adding catalyst into mixing pit 4, is urged with realizing
The automatic charging of agent.Batch charger 6 is connected to and is tightly connected with the top of mixing pit 4.
Preferably, the alkali liquid tank 51 and flocculant tank 52 of medicine system 5 including discrete setting, with provide respectively aqueous slkali and
Flocculant.In order to control the inventory of aqueous slkali and flocculant, the exit of alkali liquid tank 51 and flocculant tank 52 is also respectively set
There is the volume control device 53 of the flow for controlling aqueous slkali and flocculant.The volume control device 53 is preferably metering pump,
It can also provide the power of transport.
Reacting and separating device 7 is provided with convenient for the visual window of fluid state in observation flocculation basin 71, and visual window can be spacious
Mouthful formula, can open and close type or transparent mode.Reacting and separating device 7 can be sloping-plate sedimentation equipment or air-floating processing apparatus, and the present invention is excellent
It is selected as the common air floatation machine of field of waste water treatment, main function is continuously, is automatically separated clear water and paint slag mixture, separative efficiency
It is high.For the clear water that reacted separation equipment 7 is isolated from clear water reserviors 9 are flow to, the paint slag mixture after separation flow to slag mud sump 81 certainly.
Preferably, which further includes the slag mud dewatering system 8 for being carried out dehydrating paint slag mixture.It should
Slag mud dewatering system 8 includes slag mud sump 81, transport pump 82, slag mud dewaterer 83 and the slag mud receipts for being sequentially communicated and being tightly connected
Header 84 and compressed air system (not shown).The slag mud mixture of the import and reacting and separating device 7 of slag mud sump 81 goes out
Mouth connection, so that slag mud mixture is delivered to slag mud sump 81；Compressed air system is connected to slag mud dewaterer 83, with de- in slag mud
Compressed air is passed through after water.For the clear water isolated through slag mud dewaterer 83 from clear water reserviors 9 are flow to, the slag mud after separation is delivered to slag
Mud collecting box 84.Wherein, transport pump 82 is preferably pneumatic diaphragm pump, and slag mud dewaterer 83 can select folded spiral shell according to the actual situation
Formula, centrifugal and plate and frame slag mud dewaterer 83, but it is minimum through the dewatered slag mud moisture content of plate and frame slag mud dewaterer 83, contain
Water rate is about 70%.
The preferred embodiment of the present invention is described below in detail
First preferred embodiment
The content of paint slag is 2000mg/L, the pH value of waste water in recycling waste water (aqueous paint waste water) in paint spray booth of the invention
About 4, about 460 cubic metre/day of wastewater flow rate.
Processing method: the processing capacity of waste water treatment system is set as 25m3/h.It should be noted that this preferred embodiment
It is continuous processing process.
1, piece alkali is configured to the aqueous slkali of 3% concentration in alkali liquid tank 51, stirs 60min, it is spare.
2, solid-state cationic PAM is configured to the solution of 1 ‰ concentration in flocculant tank 52, stirs 60min, it is spare.
3, the waste water in wastewater collection pond 1 is continuously conveyed through waste water lifting pump 2 to PH conditioning tank 3.
4, aqueous slkali is put into PH conditioning tank 3 by metering pump 53, is counted by PH and automatically control dosage, adjusts waste water
PH value is to 8, residence time 5min.
5, plant drymeal, inventory 1.2kg/h are added into mixing pit 4 by batch charger 6, and are uniformly stirred with waste water
It mixes, stirs residence time 5min.The step provides enough condensation nucleus for the cohesion of subsequent paint slag, plays catalytic action, but need to stir
Extremely uniformly mix with waste water to play one's part to the full.Rule of thumb, it is preferable that mechanical stirring device 10 at the mixing pit 4
Effect is best when revolving speed is about 120r/min.
6, cationic PAM solution is added to the flocculation basin 71 of air floatation machine 7 by metering pump 53, flow is about 4.2L/
min.Rule of thumb, it is preferable that the revolving speed of the mechanical stirring device 10 at the flocculation basin 71 is about 60r/min, revolving speed it is excessively high or
It is too low to negatively affect flocculating effect.Herein it should be noted that the setting of the flow can be by the stream of metering pump from small to large
Amount adjustment, until being kept when having observed that a large amount of bulks or sheet alumen ustum (diameter is about 3~5mm) occur and water quality becomes limpid
This flow.
7, slag mixture is painted on cleaning upper layer to the Slag Scraping Device 72 on air floatation machine 7 automatically, and the cleaning amount of paint slag mixture is
1025kg/h, paint slag mixing water content of matter is about 95%.
8, air floatation machine 7 is discharged limpid, and clear water gravity flow enters clear water reserviors 9.The pH value of clear water is about 7.5, and coloration is about 70 times,
The content of suspended matter about 100mg/L.Then painting workshop is delivered to by water pump 91 and continues cycling through use.
9, the paint slag mixture gravity flow that air floatation machine 7 cleans out automatically enters slag mud sump 81, then passes through pneumatic diaphragm pump 82
It is delivered to the dehydration of slag mud dewaterer 83, compressed air 4 hours of 0.5MPa are passed through before the full rear dump of the pressure of slag mud dewaterer 83, then
Dump to slag mud collecting box 84, slag mud is lower than 70% at lump shape, moisture content.
The present exemplary embodiment, paint slag removal rate is greater than 95% in waste water, and slag mud moisture content is lower than 70%, wastewater recycle rate
About 95%.Cost for wastewater treatment (not containing paint slag disposal costs) is 1.68 yuan/ton of waste water.
Second preferred embodiment
The processing system and treatment process of second preferred embodiment are roughly the same with first preferred embodiment, the difference is that the
The processing system of two preferred embodiments is not provided with mixing pit 4.Treatment process specifically, step 1 to 4, step 7 to 9 basic phases
Together, step 5 is that plant drymeal is added to the flocculation basin 71 of air floatation machine 7 in the first feeding port by batch charger 6 through air floatation machine 7, is thrown
Doses is 1.2kg/h, and with waste water uniform stirring, stir residence time 5min.Then step 6 is carried out, is passed through by metering pump 53
Cationic PAM solution is added to the flocculation basin 71 of air floatation machine 7 in second feeding port of air floatation machine 7, and flow is about 4.2L/min.
To sum up, beneficial effects of the present invention:
1, it carries out paint slag using the common chemical agent in market and material to clear up, compared to using under special agent processing cost
Drop 50%.
2, it is continuously automatically processed using equipment, paints the treatment effeciency of slag up to 95% or more.
3, waste water can continue cycling through use after processing, save water cost, and accomplish zero-emission substantially, meet country
The environmental requirement of energy-saving and emission-reduction.
4, waste water continuously automatically processes, and does not influence the continuous production of workshop.
5, other methods are compared, the paint slag moisture content cleaned up is lower, can reduce 25% or more solid waste cost.
Unless otherwise defined, technical and scientific term used herein and those skilled in the art of the invention
Normally understood meaning is identical.Term used herein is intended merely to describe specifically to implement purpose, it is not intended that limitation is originally
Invention.The terms such as herein presented " portion ", " part " can both indicate single part, can also indicate multiple parts
Combination.The terms such as herein presented " installation ", " setting " can both indicate that a component was attached directly to another portion
Part can also indicate that a component is attached to another component by middleware.It describes in one embodiment herein
Feature can be applied in combination another embodiment individually or with other features, unless this feature is in another implementation
It is not suitable for or is otherwise noted in mode.
The present invention has been explained by the above embodiments, but it is to be understood that, above-described embodiment is only intended to
The purpose of citing and explanation, is not intended to limit the invention to the scope of the described embodiments.Furthermore those skilled in the art
It is understood that the present invention is not limited to the above embodiments, introduction according to the present invention can also be made more kinds of member
Variants and modifications, all fall within the scope of the claimed invention for these variants and modifications.Protection scope of the present invention by
The appended claims and its equivalent scope are defined.
Claims (14)
1. a kind of processing system of aqueous paint waste water characterized by comprising
PH conditioning tank, for adjusting aqueous paint waste water to alkalinity；
Reaction Separation system is reacted for mixing catalyst and flocculant uniformly with waste water to generate and paint slag mixture
And separate the paint slag mixture, the Reaction Separation system be located at the downstream of the PH conditioning tank and with the PH conditioning tank
It is connected to and is tightly connected；And
Medicine system, for adding aqueous slkali into the PH conditioning tank and adding flocculant into the Reaction Separation system,
The medicine system and the PH conditioning tank and the Reaction Separation system connectivity are simultaneously tightly connected,
Wherein, the medicine system is provided with the flow control dress of the inventory for controlling the aqueous slkali and the flocculant
It sets.
2. processing system according to claim 1, which is characterized in that the flocculant is cationic PAM solution.
3. processing system according to claim 2, which is characterized in that the mass concentration of the cationic PAM solution is
1 ‰~2 ‰ and inventory be the waste water mass content 1%~2% or the cationic PAM solution in PAM solute
Inventory be the waste water in paint slag mass content 2 ‰~5 ‰.
4. processing system according to claim 3, which is characterized in that the Reaction Separation system includes:
Mixing pit, for carrying out catalytic pretreatment process, the mixing pit is connected to and is tightly connected with the PH conditioning tank；With
Reacting and separating device, for being condensed reaction and separating treatment process.
5. processing system according to claim 3, which is characterized in that the Reaction Separation system includes that Reaction Separation is set
It is standby, for carrying out catalytic pretreatment process, aggregation and separating treatment process.
6. processing system according to claim 4, which is characterized in that in the PH conditioning tank, adjust aqueous paint waste water
PH value to 8~9.
7. processing system according to any one of claim 1 to 6, which is characterized in that the catalyst is plant drymeal
Or aluminium/ferric inorganic salt.
8. processing system according to claim 7, which is characterized in that the inventory of the catalyst is to paint in the waste water
The 4%~6% of the mass content of slag.
9. processing system according to claim 8, which is characterized in that the partial size of the plant drymeal is less than or equal to
0.5mm。
10. processing system according to claim 9, which is characterized in that further include for making the paint slag by separating treatment
The slag mud dewatering system that mixture is carried out dehydrating.
11. processing system according to claim 4, which is characterized in that the PH conditioning tank, the mixing pit, described anti-
Separation equipment and the medicine system is answered to be respectively arranged with mechanical stirring device.
12. a kind of aqueous paint waste water of the processing system using the aqueous paint waste water as described in any one of claims 1 to 11
Processing method, which comprises the steps of:
S1 is added aqueous slkali in the aqueous paint waste water containing paint slag and carries out PH adjusting, adjusts waste water to alkalinity；
S2, catalyst is added into the waste water after PH adjusting, and full and uniform mixing is obtained by the useless of paint slag catalytic pretreatment
Water；
S3 passes through in the waste water of paint slag catalytic pretreatment into above-mentioned steps and adds flocculant, full and uniform to mix into waste water
There is the paint slag mixture largely agglomerated, and water quality becomes clarification；And
S4 the waste water after paint slag agglomerates will occurs and carry out separating treatment, separates clear water and the paint slag mixture in above-mentioned steps.
13. processing method according to claim 12, which is characterized in that further include step S5, by the institute after separating treatment
It states paint slag mixture to be carried out dehydrating, obtains clear water and slag mud.
14. processing method according to claim 13, which is characterized in that in the step S5, in the dehydration
Afterwards, it is continually fed into the compressed air of preset time, then unloads scaling-off mud.
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| CN201710548023.XA CN109205824A (en) | 2017-07-06 | 2017-07-06 | The processing system of aqueous paint waste water and the processing method for using the processing system |
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| CN201710548023.XA CN109205824A (en) | 2017-07-06 | 2017-07-06 | The processing system of aqueous paint waste water and the processing method for using the processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111908669A (en) * | 2020-09-01 | 2020-11-10 | 中山宇创环保科技有限公司 | Paint wastewater treatment integrated machine and paint wastewater treatment method |
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| CN102992533A (en) * | 2011-09-16 | 2013-03-27 | 常熟科勒有限公司 | Paint wastewater treatment system |
| CN205473184U (en) * | 2016-01-07 | 2016-08-17 | 上海洗霸科技股份有限公司 | Water paint liquid waste processing system |
| CN106186578A (en) * | 2016-08-30 | 2016-12-07 | 江苏三和环保集团有限公司 | A kind of coating wastewater processing system |
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| CN102992533A (en) * | 2011-09-16 | 2013-03-27 | 常熟科勒有限公司 | Paint wastewater treatment system |
| CN102603108A (en) * | 2012-03-27 | 2012-07-25 | 郑州爱沃特环保科技有限公司 | Circulating water treatment system of wet-type spray booth and treatment method |
| CN205473184U (en) * | 2016-01-07 | 2016-08-17 | 上海洗霸科技股份有限公司 | Water paint liquid waste processing system |
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| CN111908669A (en) * | 2020-09-01 | 2020-11-10 | 中山宇创环保科技有限公司 | Paint wastewater treatment integrated machine and paint wastewater treatment method |
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Application publication date: 20190115 |