CN108503076A - A kind of two level pretreating process for emulsified oily watewater - Google Patents
A kind of two level pretreating process for emulsified oily watewater Download PDFInfo
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- CN108503076A CN108503076A CN201810265466.2A CN201810265466A CN108503076A CN 108503076 A CN108503076 A CN 108503076A CN 201810265466 A CN201810265466 A CN 201810265466A CN 108503076 A CN108503076 A CN 108503076A
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- 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
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- 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
- C02F1/547—Tensides
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- 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
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- 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
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- 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
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of two level pretreating process for emulsified oily watewater, specific embodiment is as follows：Emulsifying liquid waste water, electrolytic degreasing concentrated base waste water are added in emulsifying liquid waste water regulating reservoir, treated, and waste water is pumped into neutralization pond neutralisation treatment, then it is once demulsified again, by the air supporting of oily waste water after primary demulsification, air supporting, which flotates the suspended matter in waste water, drains into dross pond, and underflow water carries out secondary demulsification；Waste liquid after secondary demulsification completely carries out secondary air supporting, oil skimming machine is housed on flotation tank, oil skimming machine will flow to receipts oil tank after floating oil collecting；Oily waste liquor after secondary air-flotation process is added in electrolytic degreasing wastewater equalization pond, waste water after regulating reservoir acts on, which is pumped into neutralization pond, repeats the first step, the demulsification twice of third step and the 4th step and air supporting process twice after neutralisation treatment, finally will treated that waste water is filtered rear regeneration.The treatment process operation of the present invention is efficient, and compact-sized, floor space is small, can reduce construction volume.
Description
Technical field
The invention belongs to the process fields of emulsified oily watewater, are related to a kind of two level pretreatment for emulsified oily watewater
Technique.
Background technology
Emulsified oily watewater is mainly concentrated base waste water, diluted alkaline waste water.It is a kind of typical high concentration, difficult to degrade organic
Industrial wastewater mainly contains the hazardous contaminants such as COD, sodium hydroxide, suspended matter, metasilicate pentahydrate sodium, oil-containing, new standard
《GB13456-2012》After implementation, the qualified discharge of this kind of waste water becomes industry problems.Domestic emulsified oily watewater before
Processing be all according to《GB13456-1992》Discharge standard design-build, it is pre-processed in technique and generally uses chemical method, physics
Method, heating, Mechanical Method etc., wherein common with chemical method and membrane separation process.When chemical Treatment, generally waste water is heated, is used
After demulsifier demulsification, make oil, water separation.Chemical demulsification key is to choose demulsifier.The main concentrated base waste water of emulsifying liquid waste water
Membrane separation mainly has ultrafiltration and two kinds reverse osmosis, and ultrafiltration operating cost is relatively low, but ultrafiltration membrane pipe needs timing to replace,
Entire investment cost or higher in the long run.Bioanalysis is generally after chemical method, membrane separation process.After hyperfiltration treatment
The indexs such as waste water COD, suspended matter, oil content be unable to reach discharging standards.Conventional tackling key problem work early period up to standard at present
It is concentrated mainly on pretreatment stage.The present invention is directed to which original equipment facility is transformed, treatment effeciency is improved, pollutant burden is reduced, is
End biochemical treatment reduces difficulty.Emulsified oily watewater pretreating process is an entire waster water process indispensable ring up to standard,
Also it is very important a ring, has good treatment effect to suspended matter, oil content, COD in waste water etc..Emulsification how is improved to contain
The efficiency of MBR in oily Wastewater Pretreatment is always industry research direction.
Existing diluted alkaline process for treating oil-containing waste water flow chart is as shown in Figure 1, diluted alkaline waste water is adjusted by regulating reservoir
Section, the waste water after adjusting is pumped into reaction tank by elevator pump, and oil removing is then carried out in flotation tank, after oil removing to a certain concentration
Acidity is adjusted in pH regulating reservoirs, is then passed in intermediate pool, is finally added in cooling tower with elevator pump, realizes diluted alkaline oily waste water
Processing；Simultaneously concentrated base oily waste water processing technological flow figure as shown in Fig. 2, first by concentrated base waste water be added regulating reservoir in,
The effect for being then lifted out pump is pumped into inclined tube pond, and circulating slot is entered after being filtered by filter, is then passed through ultrafiltration unit and is carried out
Enter in diluted alkaline distributing reservoir after filtering again, the process flow for then passing through diluted alkaline process for treating oil-containing waste water is handled.
It, can be directly into air supporting, removal effect of the air supporting for oil if oil-containing is few for existing oil-containing treatment process
It is very good；If oil content is more, air supporting is not just fine for the removal effect of oil.General Bubble-floating Method goes the content of oil removing to exist
0.05-0.150g/L.But due in emulsifying liquid waste water in steel plant oil content it is very high, the oil content in strong lye can reach
5-20g/L, the oil content in diluted alkaline water can reach 0.5-20g/L, so air supporting here is used in the pretreatment of oily waste water
Effect be not just fine.In the case that emulsion oil concentration is very high, need first to be demulsified after a large amount of oil of removal, air floatation machine pair
In the effect that the oil content competence exertion of low concentration is larger.The more difficult assurance of each stage of ultrafiltration operating system simultaneously；Ultrafiltration group
Part will handle with care, and pay attention to protecting, and since ultrafiltration module is precision equipment, so being careful when using installation, gently take
It puts down gently, can not get rid of bad.If component deactivates, after first being rinsed well with clear water, aqueous chemical solution is added to carry out disinfection sterilizing, and close
It seals.If winter component will also carry out antifreeze processing, otherwise component may be scrapped.
Invention content
It, can directly will be newborn the purpose of the present invention is to provide a kind of two level pretreating process for emulsified oily watewater
Change liquid waste water, electrolytic degreasing concentrated base waste water, electrolytic degreasing diluted alkaline waste water and chromate waste water to be handled together, it is possible to reduce tradition
The treatment process of step-by-step processing in processing procedure, and then waste water treatment efficiency can not only be improved, and processing cost can be saved；
Emulsifying liquid waste water and electrolytic degreasing concentrated base waste water waste water reduce suspended matter and oil content by demulsification twice simultaneously, make subsequently to locate
The breaking milk and removing oil pressure of science and engineering skill can mitigate, and significantly improve subsequent processing regulating reservoir water quality, reduce siltation.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of two level pretreating process for emulsified oily watewater, specific embodiment are as follows：
Step 1 emulsifying liquid waste water, electrolytic degreasing concentrated base waste water is added in emulsifying liquid waste water regulating reservoir, after treatment
Oily waste water be pumped into neutralization pond；
Step 2, the oily waste water by neutralization pond neutralisation treatment are once demulsified；
Oily waste water after primary demulsification is added in level-one cavitation air flotation pond and carries out an air supporting, air supporting handle by step 3
Suspended matter in waste water, which flotates, drains into dross pond, and underflow water carries out secondary demulsification；
Step 4, the waste liquid after secondary demulsification completely enter two level cavitation air flotation pond and carry out secondary air supporting, filled on flotation tank
There are oil skimming machine, oil skimming machine that will flow to receipts oil tank after floating oil collecting；
Step 5 the oily waste liquor after secondary air-flotation process is added in electrolytic degreasing wastewater equalization pond, by regulating reservoir
Waste water after effect is pumped into neutralisation treatment in neutralization pond；
Waste water after neutralisation treatment is repeated the first step, the demulsification twice of third step and the 4th step and gas twice by step 6
Floating process；
Step 7, finally by treated, waste water is filtered rear regeneration.
In the step 1, the concrete processing procedure of emulsifying liquid waste water regulating reservoir is：Emulsifying liquid waste water preconditioning pond has two
Lattice, a lattice directly use, and a lattice are spare, and the dischargeable capacity per lattice regulating reservoir is 300m3, by useless to emulsion when wastewater treatment
Water preconditioning adds FeSO in pond4, by precipitation reaction so that partial suspended thing precipitation removes.
Sulfuric acid solution is added in the step 2, in neutralization pond as solution is adjusted, by sulfuric acid solution in neutralization pond
It is pH=6.5-7 with the waste water acidity after adjusting.
In the step 2, the detailed process being once demulsified is：Primary demulsification one is added in the oily waste water of neutralisation treatment
In grade stirred tank, demulsifier W25, flocculant PAC and anion surfactant PHP are then added thereto and is sufficiently stirred 3min
It is demulsified, being again stirring for reaction 5min in the primary demulsification two level stirred tank of addition after stirring makes its demulsification completely.
In the step 3, the detailed process of secondary demulsification is：Underflow water is added in secondary demulsification level-one stirred tank, so
NaOH, flocculant PAC and anion surfactant PHP is added thereto afterwards to be sufficiently stirred 3min and be demulsified, adds after stirring
Entering to be again stirring for reaction 5min in secondary demulsification two level stirred tank keeps its demulsification complete.
In the step 5, the concrete processing procedure of electrolytic degreasing wastewater equalization pond：Emulsion and electrolytic degreasing concentrated base are useless
After pretreatment, water outlet enters electrolytic degreasing waste water with electrolytic degreasing diluted alkaline waste water and chromate waste water and preconditions pond, the tune water
Section pond is adjacently positioned with emulsifying liquid waste water pretreatment regulating reservoir, and electrolytic degreasing waste water preconditioning pond has two lattice, a lattice directly to use
One lattice are spare, per the dischargeable capacity 286m of lattice regulating reservoir3。
Sulfuric acid solution is added in the step 5, in neutralization pond as solution is adjusted, by sulfuric acid solution in neutralization pond
It is pH=6.5-7 with the waste water acidity after adjusting.
In the step 6, the waste water after neutralisation treatment is by demulsification-air supporting-demulsification-air supporting process and step 3 and step
Being demulsified twice in rapid four is identical with the substance of addition with air supporting process twice；
In the step 7, the detailed process of filtration treatment is：All pretreated air supporting waste water enter coagulating sedimentation
Chi Zhong removes iron ion and detergent in waste water, and walnut shell filter is arranged in coagulative precipitation tank water outlet, by coagulation
Treated that waste water is filtered recycling by walnut shell filter for sedimentation basin.
Beneficial effects of the present invention：
The present invention can directly give up emulsifying liquid waste water, electrolytic degreasing concentrated base waste water, electrolytic degreasing diluted alkaline waste water and containing chromium
Water is handled together, it is possible to reduce the treatment process of step-by-step processing in conventional process, and then can not only improve at waste water
Efficiency is managed, and processing cost can be saved.
Emulsifying liquid waste water and electrolytic degreasing concentrated base waste water of the present invention reduces suspended matter and oil content by demulsification twice, makes
The breaking milk and removing oil pressure of subsequent treatment process can mitigate, and can directly be handled with together with other waste water, after significantly improving
Continuous processing regulating reservoir water quality, reduces siltation.
The treatment process operation of the present invention is efficient, and compact-sized, floor space is small, can reduce construction volume.
Description of the drawings
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is the existing diluted alkaline process for treating oil-containing waste water flow chart of the present invention；
Fig. 2 is the processing technological flow figure of the existing concentrated base oily waste water of the present invention；
Fig. 3 is emulsified oily watewater two stage treatment process flow chart of the present invention.
Specific implementation mode
A kind of two level pretreating process for emulsified oily watewater, specific embodiment are as follows：
Step 1 emulsifying liquid waste water, electrolytic degreasing concentrated base waste water is added in emulsifying liquid waste water regulating reservoir, emulsifying liquid waste water
Preconditioning pond has two lattice, a lattice directly to use, and a lattice are spare, and the dischargeable capacity per lattice regulating reservoir is 300m3, logical when wastewater treatment
It crosses to precondition in pond to emulsifying liquid waste water and adds FeSO4, by precipitation reaction so that partial suspended thing precipitation removes, after processing
Oily waste water be pumped into neutralization pond；
Step 2, sulfuric acid solution is added in neutralization pond as adjusting solution, by sulfuric acid solution in neutralization pond and adjusting
Waste water acidity afterwards is pH=6.5-7, the oily waste water of neutralisation treatment is added in primary demulsification level-one stirred tank, then to it
Middle addition demulsifier W25, flocculant PAC and anion surfactant PHP are sufficiently stirred 3min and are demulsified, and are added after stirring
Being again stirring for reaction 5min in primary demulsification two level stirred tank keeps its demulsification complete；
Oily waste water after primary demulsification is added in level-one cavitation air flotation pond and carries out an air supporting, air supporting handle by step 3
Suspended matter in waste water, which flotates, drains into dross pond, and underflow water is added in secondary demulsification level-one stirred tank, then adds thereto
Enter NaOH, flocculant PAC and anion surfactant PHP and be sufficiently stirred 3min to be demulsified, secondary demulsification is added after stirring
Reaction 5min is again stirring in two level stirred tank makes its demulsification fully achieve the secondary demulsification that water is stayed at bottom；
Step 4, the waste liquid after secondary demulsification completely enter two level cavitation air flotation pond and carry out secondary air supporting, filled on flotation tank
There are oil skimming machine, oil skimming machine that will flow to receipts oil tank after floating oil collecting；
Oily waste liquor after secondary air-flotation process is added in electrolytic degreasing wastewater equalization pond step 5, while will electrolysis
Degreasing diluted alkaline waste water and chromate waste water are added electrolytic degreasing waste water and precondition pond, which is adjusted with emulsifying liquid waste water pretreatment
Pond is adjacently positioned, and electrolytic degreasing waste water preconditioning pond has two lattice, a lattice directly to use a lattice spare, per effective appearance of lattice regulating reservoir
Product 286m3, the waste water after regulating reservoir acts on are pumped into neutralization pond, and sulfuric acid solution is added in neutralization pond and is used as adjusting solution,
By in sulfuric acid solution in neutralization pond and adjust after waste water acidity be pH=6.5-7；
Waste water after neutralisation treatment is repeated the first step, the demulsification twice of third step and the 4th step and gas twice by step 6
Floating process；
Step 7 finally enters all pretreated air supporting waste water in coagulative precipitation tank, remove waste water in iron from
Son and detergent, and walnut shell filter is set in coagulative precipitation tank water outlet, it is passed through by coagulative precipitation tank treated waste water
Walnut shell filter is crossed to be filtered and recycle；Wherein coagulative precipitation tank uses steel corrosion structure, built-in inclined tube, coagulation
The appearance and size of sedimentation basin is：Long 7500mm, wide 3000mm, high 3000mm, dischargeable capacity 63m3, waste water stops in sedimentation basin
Time is 1h, and 40 inclined tubes of φ are configured in pond；Coagulative precipitation tank water outlet enters walnut shell filter, walnut shell filter working method
For pressure type, the method for operation is that flow is run from top to bottom；The cycle of operation is 8-24h；Backwash mode is water backwash；Backwash lasts
20-30min；1800 × 3200mm of appearance and size Φ；Inlet and outlet pipes bore：DN100, backwash water inlet, backwash drain bore：
DN100, the backwash to walnut shell filter carry out pressure flush using submerged centrifugal pump.The backwash water of walnut shell filter is certainly
The sewage collecting pool flowing in electrolytic degreasing workshop.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention
Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (7)
1. a kind of two level pretreating process for emulsified oily watewater, which is characterized in that specific embodiment is as follows：
Step 1 emulsifying liquid waste water, electrolytic degreasing concentrated base waste water is added in emulsifying liquid waste water regulating reservoir, containing after treatment
Oily waste water is pumped into neutralization pond；
Step 2, the oily waste water by neutralization pond neutralisation treatment are once demulsified；
Oily waste water after primary demulsification is added in level-one cavitation air flotation pond and carries out an air supporting by step 3, and air supporting is waste water
In suspended matter flotate and drain into dross pond, underflow water carries out secondary demulsification；
Step 4, the waste liquid after secondary demulsification completely enter two level cavitation air flotation pond and carry out secondary air supporting, be equipped with and skim on flotation tank
Oil machine, oil skimming machine will flow to receipts oil tank after floating oil collecting；
Oily waste liquor after secondary air-flotation process is added in electrolytic degreasing wastewater equalization pond, is acted on by regulating reservoir by step 5
Waste water afterwards is pumped into neutralisation treatment in neutralization pond；
Waste water after neutralisation treatment is repeated the demulsification twice and air supporting twice of the first step, third step and the 4th step by step 6
Journey；
Step 7, finally by treated, waste water is filtered rear regeneration.
2. a kind of two level pretreating process for emulsified oily watewater according to claim 1, which is characterized in that described
In step 1, the concrete processing procedure of emulsifying liquid waste water regulating reservoir is：Emulsifying liquid waste water preconditioning pond has two lattice, a lattice directly to make
With a lattice are spare, and the dischargeable capacity per lattice regulating reservoir is 300m3, by being preconditioned in pond to emulsifying liquid waste water when wastewater treatment
Add FeSO4, by precipitation reaction so that partial suspended thing precipitation removes.
3. a kind of two level pretreating process for emulsified oily watewater according to claim 1, which is characterized in that described
Sulfuric acid solution is added in step 2, in neutralization pond as solution is adjusted, by useless in sulfuric acid solution in neutralization pond and after adjusting
Acidity of water is pH=6.5-7.
4. a kind of two level pretreating process for emulsified oily watewater according to claim 1, which is characterized in that described
In step 2, the detailed process being once demulsified is：The oily waste water of neutralisation treatment is added in primary demulsification level-one stirred tank, so
Demulsifier W25, flocculant PAC and anion surfactant PHP is added thereto afterwards to be sufficiently stirred 3min and be demulsified, stirs
Being again stirring for reaction 5min in the primary demulsification two level stirred tank of addition afterwards makes its demulsification completely.
5. a kind of two level pretreating process for emulsified oily watewater according to claim 1, which is characterized in that described
In step 3, the detailed process of secondary demulsification is：Underflow water is added in secondary demulsification level-one stirred tank, is then added thereto
NaOH, flocculant PAC and anion surfactant PHP are sufficiently stirred 3min and are demulsified, and secondary demulsification two is added after stirring
Reaction 5min is again stirring in grade stirred tank keeps its demulsification complete.
6. a kind of two level pretreating process for emulsified oily watewater according to claim 1, which is characterized in that described
In step 5, the concrete processing procedure of electrolytic degreasing wastewater equalization pond：Emulsion and electrolytic degreasing concentrated base waste water after pretreatment,
It is discharged enters electrolytic degreasing waste water preconditioning pond with electrolytic degreasing diluted alkaline waste water and chromate waste water, and the regulating reservoir is useless with emulsion
Water pretreatment regulating reservoir is adjacently positioned, and electrolytic degreasing waste water preconditioning pond has two lattice, a lattice directly to use a lattice spare, per style
Save the dischargeable capacity 286m in pond3。
7. a kind of two level pretreating process for emulsified oily watewater according to claim 1, which is characterized in that described
In step 7, the detailed process of filtration treatment is：All pretreated air supporting waste water enter in coagulative precipitation tank, remove waste water
In iron ion and detergent, and coagulative precipitation tank water outlet be arranged walnut shell filter, after coagulative precipitation tank is handled
Waste water be filtered recycling by walnut shell filter.
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| CN110759584A (en) * | 2019-10-10 | 2020-02-07 | 天津中冀源环保科技有限公司 | Emulsion wastewater treatment process |
| CN113716812A (en) * | 2021-09-16 | 2021-11-30 | 江苏迈奥环保科技有限公司 | Recycling process of waste emulsion |
| WO2022093002A1 (en) * | 2020-10-05 | 2022-05-05 | Arnulfo Montes Cuen | Industrial and hydrocarbon wastewater treatment system |
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| CN113716812A (en) * | 2021-09-16 | 2021-11-30 | 江苏迈奥环保科技有限公司 | Recycling process of waste emulsion |
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