CN110183018A - A kind of shunt electroplating sewerage Zero discharge treatment method - Google Patents
A kind of shunt electroplating sewerage Zero discharge treatment method Download PDFInfo
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- CN110183018A CN110183018A CN201910477746.4A CN201910477746A CN110183018A CN 110183018 A CN110183018 A CN 110183018A CN 201910477746 A CN201910477746 A CN 201910477746A CN 110183018 A CN110183018 A CN 110183018A
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/447—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by membrane distillation
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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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
Abstract
The present invention relates to a kind of shunt electroplating sewerage Zero discharge treatment methods.The processing method includes the following steps: S1: electroplating wastewater is divided into cleaning waste water, oil removing except cured waste water and hc effluent；S2: cleaning waste water is arrived through the processing such as coarse filtration, MCR technology, ion exchange, carbon filtration, UF film can reuse water quality；S3: except cured waste water is through acid out oxidation processes, aeration is handled after the processing such as stirring according to the step of S2 for oil removing；S4: it adjusts the pH of hc effluent and is handled after addition reducing agent after equal processing according to the step of S2.Processing method of the invention classifies to electroplating wastewater, specific aim processing is carried out to the waste water of different pollution levels, select the full physical separation technology for only introducing a small amount of external medicament, waste water can achieve industrial reuse water quality standard after processing, conductivity is low, is not easy stifled film, 99% or more wastewater recycle rate, about 1% waste liquid is only generated after processing, it can be achieved that wastewater zero discharge.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of shunt electroplating sewerage Zero discharge treatment method.
Background technique
Contain a large amount of chelating agent, heavy metal, the pollutants such as high COD in electroplating technology waste water.It is more that type is chelated in waste water,
Strong to the sequestering power of the heavy metals such as metallic nickel, the heavy metals such as nickel also do not precipitate under alkaline condition.Wastewater treatment is difficult, cost
Height is unable to stably reaching standard problem always and annoyings the development of electroplating industry.
Currently, electroplating wastewater generally uses pretreatment+UF+Ro film method to be handled, but there is production water power in such methods
The shortcomings that conductance is higher, easily blocks up film.
Therefore, it develops that a kind of production water conductivity is low, be not easy stifled film and can realize that the treatment process of wastewater zero discharge has weight
The research significance and application value wanted.
Summary of the invention
The purpose of the present invention is to overcome the defects in the prior art and insufficient, provides a kind of shunt electroplating sewerage zero-emission
Put processing method.The processing method provided by the present invention classifies to electroplating wastewater, carries out needle to the waste water of different pollution levels
To property processing, the full physical separation technology for only introducing a small amount of external medicament is selected, waste water can achieve industry after processing
Recycle water standard, conductivity is low, is not easy stifled film, and 99% or more wastewater recycle rate only generates about 1% waste liquid after processing, can
Realize wastewater zero discharge.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of shunt electroplating sewerage Zero discharge treatment method, includes the following steps:
S1: electroplating wastewater is divided into cleaning waste water, oil removing except cured waste water and hc effluent；
S2: cleaning waste water after coarse filtration, filtered again using MCR technology, then using negative resin and positive resin carry out from
After son exchange, successively through UF film and the reverse osmosis Ro film process of three-level after carbon filtration, Ro produce water be can reuse water quality, Ro concentrated water makees
Subsequent processing is carried out for hc effluent；
S3: oil removing is aerated except cured waste water is after acid out oxidation processes, stirring, and adjusting pH is 3.5~4, is then sequentially added
Reducing agent and oxidant adjust pH after being handled be 9~10, and standing obtains supernatant and sludge, and supernatant is evaporated, separated
Water outlet is handled as cleaning waste water according to the step of S2 afterwards；
S4: after the pH for adjusting hc effluent is 3~4, after reducing agent is added, readjustment pH is 8~9, and coarse filtration utilizes MCR skill
After art filters again, ultrafiltration, concentration are carried out using STUF membranous system technology, water outlet is as cleaning after then evaporating, separating
Waste water is handled according to the step of S2.
Plating general technology comprises the following steps: pre-treatment-preplating-cleaning-plating-cleaning-is gold-plated/
Palladium-cleaning, if electroplating effect is bad to include the steps that cleaning-strip-cleaning-plating etc., Ge Geliu after plating
The classification and content difference of the pollutants such as the chelating agent in waste water, heavy metal, COD that journey step obtains are very big, are such as mixed
Get up and handle together, more highly concentrated waste liquid will be generated, cause special membrane and vapo(u)rization system heavy-duty service, operation costs a large amount of
Increase.The waste water of each step is classified in present invention trial, specifically includes cleaning waste water, oil removing removes cured waste water and highly concentrated useless
Water, wherein cleaning waste water is the waste water that each cleaning step generates, pH is 5~6, COD≤50mg/L, conductivity≤500 μ s/cm；
Oil removing is the waste water of pre-treatment step except cured waste water, wherein being added to a large amount of surfactant, general pH is 10~12, COD
>=5000mg/L, conductivity≤1000 μ s/cm；The waste liquid of the more tank liquor of remaining each step, higher COD and conductivity is as highly concentrated
Waste water is handled, and the pH of hc effluent is 5~6, COD >=3000mg/L, conductivity >=10000 μ s/cm.
Clean in the processing of waste water, the present invention in coarse filtration removal waste water after large particle, silt, using MCR technology into
Row filters again.MCR technology can intercept a small amount of fine suspension that may be present and colloidal substance in removal waste water.Then it carries out
Ion exchange is to remove the heavy metal and COD substance in waste water, the production water that obtains after UF film and the reverse osmosis Ro film process of three-level
Conductivity≤6 μ s/cm, Cod≤5mg/L, can direct reuse in electroplating workshop for normally produce.
Contain a large amount of wax, grease and jelly in removing oil-removing wax waste water, COD content is very high, and processing difficulty is larger.
It such as selects conventional coagulation sedimentation method to be handled, a large amount of chemicals will be increased and use and generate more solid waste.This
Invention successively utilizes acid out oxidation processes, reduction treatment and oxidation processes, can sufficiently remove the organic species in waste water.Then
Condensate liquid after evaporation process can enter in cleaning waste water, and COD content substantially reduces in water outlet, then according in S2 step
After processing method removes particulate matter, silt, fine suspension and colloidal substance, heavy metal and a small amount of COD substance, obtained production
Water conductivity≤6 μ s/cm, Cod≤5mg/L, can direct reuse in electroplating workshop for normally produce.
The processing of hc effluent is that difficulty is maximum, mainly due to hc effluent belong to it is high organic, it is high in salt, and contain
A small amount of fluoride and calcium carbonate.The present invention has attempted a variety of processing modes, such as UF+ seawater film, but treatment effect is general.Through
Repeatedly a kind of preferable mode for the treatment of effect is found in research finally.
The invention firstly uses reducing agents to restore the oxidation material in waste water, then through big in coarse filtration removal waste water
After particulate matter, silt, using a small amount of fine suspension that may be present in MCR technology interception for re-filtering removal waste water and
Colloidal substance.Recycle the SS in STUF membranous system technical filter separation waste water, colloid, the polluters such as particulate matter, after avoiding
There is the bad problem of stifled film, treatment effect in continuous concentration；Then concentration and separation dissolution inorganic salts and heavy metal classes are dirty
Contaminate object, after evaporating water outlet in organic matter and conductivity be greatly reduced, according still further to cleaning waste water processing technological flow into
Row processing, obtained production water conductivity≤6 μ s/cm, Cod≤5mg/L, can direct reuse in electroplating workshop for normally produce.
Shunt electroplating sewerage Zero discharge treatment method provided by the invention can achieve after handling electroplating wastewater
Industrial reuse water quality standard, conductivity is low, is not easy stifled film, 99% or more wastewater recycle rate, only generate after processing about 1% it is useless
Liquid is, it can be achieved that wastewater zero discharge.
Preferably, the pH that waste water is cleaned described in S1 is 5~6, COD≤50mg/L, conductivity≤500 μ s/cm；It is described to remove
The pH of oily paraffin removal waste water is 10~12, COD >=5000mg/L；The pH of the hc effluent is 5~6, COD >=3000mg/L conductance
Rate >=10000 μ s/cm.
Preferably, coarse filtration is carried out using active carbon in S2.
The present invention to the positive resin (such as domestic positive resin, TP-207) and negative resin of this field routine (such as domestic negative resin,
MP-68-P2 it) is preferably found, though each resin has preferable ion-exchange effect at processing initial stage, after long time treatment
(loss of backwash bring) is lost in domestic resin, and regeneration cost (soda acid dosing), the cleaning cost of resin equipment are all larger than
TP-207 and MP-68-P2.
Preferably, resin is TP-207, negative resin MP-68-P2 in S2；
Preferably, the number of the ion exchange is one or many.
Multiple groups positive resin and negative resin can be selected to carry out resins exchange as needed, the sequence of positive resin and negative resin has no
It is required that recycling multiple groups negative resin to carry out ion exchange after ion exchange being carried out first with multiple groups positive resin；Or it is first sharp
After carrying out ion exchange with multiple groups negative resin, multiple groups positive resin is recycled to carry out ion exchange；It can also negative resin and positive resin friendship
For progress.
In order to be made full use of to negative resin and positive resin, save the cost, it is preferable that further include in S2 to negative resin and
Positive resin carries out the step of regeneration treatment.
Regeneration treatment can carry out in such a way that this field is conventional.
Preferably, regeneration treatment is carried out to negative resin using hydrochloric acid in S2；Positive resin is carried out using sodium hydroxide solution
Regeneration treatment.
Preferably, pH is adjusted using one or more of sulfuric acid solution, hydrochloric acid solution or nitric acid solution in S3.
The acid solution that this field routine can be selected adjusts pH.
Preferably, pH is adjusted using sulfuric acid solution in S3.
Reducing agent and oxidant conventional in the art are used equally in the present invention.
Preferably, reducing agent described in S3 is ferrous sulfate, sodium hydrogensulfite.
Preferably, oxidant described in S3 is hydrogen peroxide, bleaching water.
Preferably, S3 further includes the steps that carrying out being packaged outward transport processing to the sludge.
Preferably, the technology of STUF membranous system described in S4 includes STRO pre-concentration technology and DTRO secondary concentration technology.
STRO pre-concentration technology is mainly for separating of dissolution inorganic salts and heavy metal classes pollutant.
The concentrated water that DTRO secondary concentration technology generates mainly for the treatment of STRO.
99% conductivity≤6 μ s/cm, COD≤5mg/L can be obtained in S3 and S4 step of the present invention after evaporating separating treatment
Or more middle water, additionally there are the boiled off liquor for being not higher than 1%, which carries out at other methods after can concentrating
Reason.
Preferably, the boiled off liquor evaporated in S3 or S4 is not higher than 1%.
Compared with prior art, the invention has the following beneficial effects:
The processing method provided by the present invention classifies to electroplating wastewater, carries out specific aim to the waste water of different pollution levels
Processing, selects the full physical separation technology for only introducing a small amount of external medicament, and waste water can achieve industrial reuse after processing
Water quality standard, conductivity is low, is not easy stifled film, 99% or more wastewater recycle rate, only generate about 1% waste liquid after processing, it can be achieved that
Wastewater zero discharge.
Detailed description of the invention
Fig. 1 is the process flow chart that embodiment 1 provides.
Specific embodiment
Below with reference to embodiment, the present invention is further explained.These embodiments are merely to illustrate the present invention rather than limitation
The scope of the present invention.Test method without specific conditions in lower example embodiment usually according to this field normal condition or is pressed
The condition suggested according to manufacturer；Used raw material, reagent etc., unless otherwise specified, being can be from the business such as conventional market
The raw materials and reagents that approach obtains.The variation for any unsubstantiality that those skilled in the art is done on the basis of the present invention
And replacement belongs to scope of the present invention.
Electroplating sewerage is classified, the wastewater collection that cleaning step is generated, as cleaning waste water；By pre-treatment waste water
It collects, as removing oil-removing wax waste water；By remaining wastewater collection, as hc effluent.Three kinds of waste water are measured, as a result such as table
1。
The water quality of waste water in 1 embodiment of table
Embodiment 1
The present embodiment provides a kind of shunt electroplating sewerage Zero discharge treatment methods, and detailed process is as follows.
(1) processing of waste water is cleaned
Waste water is cleaned after collecting-tank is collected, with water pump lifting to active carbon filter, by large particle in waste water, silt
Deng removal after into MCR carbon filtration produce water collect water tank；Enter sun through bag filter by the above pretreated cleaning waste water
Resin (TP-207) system, to the Cu in waste water, the heavy metal pollutants such as Ge carry out resins exchange；Enter negative resin (MP- afterwards
68-P2), resins exchange is carried out to heavy metal pollutants such as Ni in waste water；The hydrochloric acid of 35wt% is used after resin saturation respectively
Resin regeneration is carried out with the NaOH of 25wt%, to guarantee its exchange efficiency.It is good for strict guarantee workshop water water quality, by waste water
In heavy metal and part COD removal after (conductivity≤50 μ s/cm, Cod≤30mg/L), later enter reuse water system,
It produces after water crosses cartridge filter and enters the reverse osmosis Ro film of three-level, it is final to produce water direct reuse in electroplating workshop for normally producing；
Ro concentrated water enters high load wastewater treatment system and carries out subsequent processing.
(2) processing of removing oil-removing wax waste water
Oil removing is except cured waste water is after collecting, with water pump lifting to acid out slot (slot volume 2m3) acid out oxidation is carried out in batches
Processing, process are as follows: sulfuric acid being added after being aerated and stirring waste liquid by pH and is adjusted to 3.5~4 or so, 12.5kg is added
40kg hydrogen peroxide is about added in ferrous sulfate after twenty minutes.PH 9~10 is adjusted back after oxidation 3 hours, is closed aeration and sedimentation 30 minutes
Waste liquid in slot is pumped into acid out filter press with diaphragm pump afterwards, sludge is packaged outward transport after carrying out mud-water separation, and filtrate enters evaporated
Pretreatment water tank is managed, dope enters triple effect evaporator preheater by vapo(u)rization system vacuum self-priming, and dope is steamed by triple effect evaporator
Enter triple effect evaporator separator after hair, by separator, condensed water pump through condensate pump to the general cleaning wastewater disposal basin of plating and
Electroplating cleaning waste water is back to use electroplating workshop after handling together.A small amount of boiled off liquor (about 5%), which is discharged into highly concentrated exhausted bath box commission, to be had
Qualification processing company is further processed.
(3) processing of hc effluent
The processing of hc effluent is the most key step, and the difficulty of processing is maximum, will directly affect the water quality of processing
As a result.
For hc effluent, three kinds of different processing methods of the present embodiment selection:
1.1 utilize pretreatment+sand carbon filtration+sea water desalination membrane processing mode (being denoted as scheme one)
Pretreatment: workshop hc effluent, into reduction pond, is added reducing agent (sodium hydrogensulfite) after adjusting pH value 3~4
After oxidation material in waste water is restored, waste water adjusts pond from pH is flowed into, and adjusts back after pH is 8~9 from sedimentation basin is flowed into, will
Large particle in waste water, the removal such as silt, then from coagulating basin is flowed into, the coagulant such as ferric trichloride removal part height, which is added, to be had
Machine substance enters concentrated water after intercepting a small amount of fine suspension that may be present in waste water and colloidal substance and collects water tank；Then
PAM (polyacrylamide) is added from flocculation basin is flowed into, carries out mud-water separation from sedimentation basin is flowed into, sludge is outer after filter press filters pressing
Fortune, filtrate flow back into system front end and are reprocessed.The above pretreatment supernatant enters UF after sand carbon filtration, in waste water
SS, colloid, the separation of the polluters such as particulate matter；UF membranous system produces water and enters sea water desalination membrane Ro system, and concentrated water enters evaporated
Pretreatment water tank is managed, dope enters triple effect evaporator preheater by vapo(u)rization system vacuum self-priming, and dope is steamed by triple effect evaporator
Enter triple effect evaporator separator after hair, by separator, condensed water pump through condensate pump to the general cleaning wastewater disposal basin of plating and
Electroplating cleaning waste water is back to use electroplating workshop after handling together.A small amount of boiled off liquor (about 5%), which is discharged into highly concentrated exhausted bath box commission, to be had
Qualification processing company is further processed.
1.2 pretreatment+UF+ sea water desalination membranes (being denoted as scheme two)
Pretreatment: workshop hc effluent, into reduction pond, is added reducing agent (sodium hydrogensulfite) after adjusting pH value 3~4
After oxidation material in waste water is restored, waste water adjusts pond from pH is flowed into, and adjusts back after pH is 8~9 from sedimentation basin is flowed into, will
Large particle in waste water, the removal such as silt, then from coagulating basin is flowed into, the coagulant such as ferric trichloride removal part height, which is added, to be had
Machine substance enters concentrated water after intercepting a small amount of fine suspension that may be present in waste water and colloidal substance and collects water tank；Then
PAM (polyacrylamide) is added from flocculation basin is flowed into, carries out mud-water separation from sedimentation basin is flowed into, sludge is outer after filter press filters pressing
Fortune, filtrate flow back into system front end and are reprocessed.The above pretreatment supernatant enters UF after sand carbon filtration, in waste water
SS, colloid, the separation of the polluters such as particulate matter；UF membranous system produces water and enters sea water desalination membrane Ro system, and concentrated water enters evaporated
Pretreatment water tank is managed, dope enters triple effect evaporator preheater by vapo(u)rization system vacuum self-priming, and dope is steamed by triple effect evaporator
Enter triple effect evaporator separator after hair, by separator, condensed water pump through condensate pump to the general cleaning wastewater disposal basin of plating and
Electroplating cleaning waste water is back to use electroplating workshop after handling together.A small amount of boiled off liquor (about 5%), which is discharged into highly concentrated exhausted bath box commission, to be had
Qualification processing company is further processed.
1.3 pretreatment+UF+ sea water desalination membranes (being denoted as scheme three)
Pretreatment: workshop hc effluent, into reduction pond, is added reducing agent (sodium hydrogensulfite) after adjusting pH value 3~4
After oxidation material in waste water is restored, waste water adjusts pond from pH is flowed into, and adjusts back after pH is 8~9 from sedimentation basin is flowed into, will
Large particle in waste water, the removal such as silt, then from MCR system is flowed into, by a small amount of tiny suspension that may be present in waste water
Object and colloidal substance enter concentrated water after intercepting and collect water tank；Enter STUF membranous system by the above pretreated waste water, in waste water
SS, colloid, the polluters such as particulate matter separation；STUF membranous system produces water and enters STRO system buffer water tank, by buffer tank
High-pressure pump enters STRO system to raw water progress pre-concentration after crossing cartridge filter, and separation dissolution inorganic salts and heavy metal classes are dirty
Object is contaminated, water is produced and enters three-level Ro primary water producing tank, concentrated water enters DTRO system buffer water tank, crosses security personnel by buffer tank high-pressure pump
Enter DTRO after filter and carry out secondary concentration, DTRO system produces water and enters three-level Ro primary water producing tank, and concentrated water enters evaporated
Pretreatment water tank is managed, dope enters triple effect evaporator preheater by vapo(u)rization system vacuum self-priming, and dope is steamed by triple effect evaporator
Enter triple effect evaporator separator after hair, by separator, condensed water pump through condensate pump to the general cleaning wastewater disposal basin of plating and
Electroplating cleaning waste water is back to use electroplating workshop after handling together.A small amount of boiled off liquor (about 1%), which is discharged into highly concentrated exhausted bath box commission, to be had
Qualification processing company is further processed.
It is the processing result that three kinds of Different treatments handle hc effluent such as table 2.
The processing result of 2 three kinds of Different treatments processing hc effluents of table
Carrying out that treated to cleaning waste water+removing oil-removing wax waste water+hc effluent (three kinds of processing modes), total water quality carries out
Detection, as a result such as table 3.
Treated the total water quality of table 3
To table 2 and table 3 it is found that the processing method of reason+UF+ sea water desalination membrane is selected to carry out processing generation to hc effluent
Waste liquid is few, and treating capacity is big, and wastewater recycle rate is high.
From the foregoing, the processing method provided by the present invention classifies to electroplating wastewater, gives up to different pollution levels
Water carries out specific aim processing, selects the full physical separation technology for only introducing a small amount of external medicament, and waste water after processing can be with
Reach industrial reuse water quality standard, conductivity is low, is not easy stifled film, and 99% or more wastewater recycle rate only generates about 1% after processing
Waste liquid is, it can be achieved that wastewater zero discharge；The recycle-water is upright after processing takes back for electroplating workshop for normally producing.
Those of ordinary skill in the art will understand that embodiment here be to help reader understand it is of the invention
Principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field it is common
Technical staff disclosed the technical disclosures can make the various various other tools for not departing from essence of the invention according to the present invention
Body variations and combinations, these variations and combinations are still within the scope of the present invention.
Claims (10)
1. a kind of shunt electroplating sewerage Zero discharge treatment method, which comprises the steps of:
S1: electroplating wastewater is divided into cleaning waste water, removing oil-removing wax waste water and hc effluent；
S2: cleaning waste water is filtered after coarse filtration using MCR technology again, then carries out ion friendship using negative resin and positive resin
After changing, successively through UF film and the reverse osmosis Ro film process of three-level after carbon filtration, Ro produce water be can reuse water quality, Ro concentrated water is as high
Density wastewater carries out subsequent processing；
S3: removing oil-removing wax waste water is aerated after acid out oxidation processes, stirring, and adjusting pH is 3.5~4, then sequentially adds reduction
Agent and oxidant adjust pH after being handled be 9~10, stands to obtain supernatant and sludge, supernatant evaporated, separate after be discharged
It is handled as cleaning waste water according to the step of S2；
S4: after the pH for adjusting hc effluent is 3~4, after reducing agent is added, readjustment pH is 8~10, coarse filtration, again using MCR technology
It after secondary filtering, is filtered using STUF membranous system technology, concentration, water outlet is as cleaning waste water after then evaporating, separating
It is handled according to the step of S2.
2. shunt electroplating sewerage Zero discharge treatment method according to claim 1, which is characterized in that cleaning described in S1 is useless
The pH of water is 5~6, COD≤50mg/L, conductivity≤500 μ s/cm；The pH of the removing oil-removing wax waste water be 10~12, COD >=
5000mg/L, conductivity≤1000 μ s/cm；The pH of the hc effluent is 5~6, COD >=3000mg/L, conductivity >=10000
μs/cm。
3. processing method according to claim 1, which is characterized in that carry out coarse filtration using active carbon in S2.
4. processing method according to claim 1, which is characterized in that negative resin is TP-207, positive resin MP-68- in S2
P2；The number of the ion exchange is one or many.
5. processing method according to claim 1, which is characterized in that further include being regenerated to negative resin and positive resin in S2
The step of processing.
6. processing method according to claim 5, which is characterized in that carry out regeneration treatment to negative resin using hydrochloric acid in S2；
Regeneration treatment is carried out to positive resin using sodium hydroxide solution.
7. processing method according to claim 1, which is characterized in that molten using sulfuric acid solution, hydrochloric acid solution or nitric acid in S3
One or more of liquid adjusts pH.
8. processing method according to claim 1, which is characterized in that reducing agent described in S3 is sodium hydrogensulfite or ferrous salt
One or more of, oxidant described in S3 is one or more of hydrogen peroxide or drift ice.
9. processing method according to claim 1, which is characterized in that the technology of STUF membranous system described in S4 includes STRO pre- dense
Contracting technology and DTRO secondary concentration technology.
10. processing method according to claim 1, which is characterized in that the boiled off liquor evaporated in S3 or S4 is not higher than
1%.
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