CN110054317A - A kind of processing method of the highly concentrated waste liquid generated in wiring board manufacture - Google Patents
A kind of processing method of the highly concentrated waste liquid generated in wiring board manufacture Download PDFInfo
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- CN110054317A CN110054317A CN201910347797.5A CN201910347797A CN110054317A CN 110054317 A CN110054317 A CN 110054317A CN 201910347797 A CN201910347797 A CN 201910347797A CN 110054317 A CN110054317 A CN 110054317A
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- waste liquid
- mixture
- acid
- wiring board
- processing method
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Classifications
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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
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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 printed circuit board technology field, the processing method of the highly concentrated waste liquid generated in specially a kind of wiring board manufacture.Organic wastewater in combined circuit plate production industry of the present invention, acid waste liquid, the characteristics of three kinds of waste water of waste water is complexed, acid precipitation reaction is carried out using the acidity of acid waste liquid and complexing waste water and organic wastewater, the complexing good sedimentation function of Cu in waste water ion is utilized simultaneously, collaboration promotes the precipitation reaction of organic wastewater, not only can effectively it realize waste treatment and waste, reduce the use of medicament, useless cost is controlled in reduction, and various wastewater is handled simultaneously can save and control useless space, complicated influence each other is formed by substance complicated in each waste water, it is formed by sediment and can be substantially reduced when being carried out dehydrating and the problem of filter cloth blocking occur, the filter cloth cleaning frequency can extend to original 6 times.
Description
Technical field
The present invention relates to the highly concentrated waste liquids generated in printed circuit board technology field more particularly to a kind of manufacture of wiring board
Processing method.
Background technique
The manufacturing of circuit board is related to multiple process procedures, as acid etching, alkali etching, microetch, brownification, heavy copper,
Electric plating of whole board develops, moves back film etc., can generate the waste water with different characteristics, it is special to need to carry out according to the characteristic of these waste water
It handles and can just be discharged after up to standard, including organic waste water, acid waste liquid and complexing this three categories of waste water.
Organic wastewater from ectonexine development waste liquid, wet film developer solution, move back film and discard cylinder liquid, contain in organic wastewater
By the photosensitive type ink and dry film of the photosensitive resin monomer composition containing carboxyl (- COOH).Acid waste liquid is also referred to as acid waste water, mainly
Refer to from each pickling process row's cylinder and maintain waste water, major pollutants contained by acid waste liquid are copper ion, CODCrDeng.Waste water is complexed
Also referred to as high copper waste water refers mainly to the rinse water discharged from acid, alkali etching line and PTH production line, containing higher concentration
Acid, copper ion, complexing waste water major pollutants are CODCr, complexing ammonia copper, complexing EDTA copper etc..
Currently, individually being handled in board production industry complexing waste water and organic wastewater.Complexing waste water has individually
Sewage treatment facility, common ferrous iron contact break method handled, and complexing waste water is first collected through conditioning tank is unified, is then mentioned by pump
Rise to reaction tank.Because when pH is 2-3, the ferrous ion in ferrous sulfate has reproducibility, it can be by cupric in waste water
Ion reduction is at univalent copper ion, and univalent copper ion and ammonia, EDTA, the complex compound of chloride ion formation are no longer stable, monovalence copper
Ion reacts to form cuprous hydroxide with hydroxyl, and then is dehydrated and forms copper oxidule precipitation.By reaction, waste water can will be complexed
Middle content of copper ion is reduced to 100mg/L or less.The pH value in the coagulation stage of ferrous contact break method is preferably controlled in 8-9, by sedimentation basin
Supernatant be discharged into comprehensive wastewater conditioning tank, after separation sludge be discharged into sludge-tank and concentrate be carried out dehydrating.Organic wastewater one
As first collected through conditioning tank is unified, then acid out pond is promoted to pump, by the pH to 2-3 of acid adding adjusting organic wastewater, at this
Jelly is precipitated in organic wastewater under the conditions of pH, and lasting stirring makes jelly keep suspended state, organic wastewater is then made to enter reaction
Pond simultaneously adds molysite, high molecular polymer, carries out coagulating to form the big grain wadding body that specific gravity is greater than water, then solid through sedimentation basin
After liquid separation, the COD in organic wastewaterCrContent can decline 60-70%.The supernatant of sedimentation basin is discharged into comprehensive wastewater processing again
System is uniformly processed, and is discharged after up to standard, and sludge is discharged into sludge-tank and concentrates and is carried out dehydrating after separation.
Board production industry in the above way individually handles complexing waste water and organic wastewater at present, and waste water is complexed
Processing there are reagent cost height, the processing of organic wastewater needs to reduce its pH value with sulfuric acid, and sulfuric acid dosage is more, and generated
Sludge is difficult, and filter-press dehydration process is frequently occurred the blocked problem of filter cloth.
Summary of the invention
To waste water and organic wastewater progress is complexed, individually there are at high cost, places for processing for board production industry by the present invention
Reason organic wastewater is formed by that sludge is difficult, and sludge press filtration frequently occurs filter cloth blocked problem when being dehydrated, and provides one kind
The method of a variety of highly concentrated waste liquids generated in process circuit plate manufacture simultaneously.
To achieve the above object, the present invention uses following technical scheme.
A kind of processing method of the highly concentrated waste liquid generated in wiring board manufacture, comprising the following steps:
S1, under continuous stirring, organic wastewater are uniformly mixed in the first acid out pond with complexing waste water, are formed first and are mixed
Object.
S2, under continuous stirring, the first mixture is uniformly mixed in the second acid out pond with acid waste liquid, and it is mixed to form second
Close object.
S3, the second mixture is passed through in third acid out pond, the pH of liquid is adjusted to 2-3 under continuous stirring, be precipitated solid
State jelly forms third mixture.
Preferably, sulfuric acid is put into third acid out pond the pH of liquid is adjusted to 2-3, solid state gelatineous object is precipitated, is formed
Third mixture.
S4, third mixture is passed through in coagulation reaction tank, it is sub- puts into sulfuric acid into coagulation reaction tank under continuous stirring
Iron coagulant forms the 4th mixture.
S5, the 4th mixture is passed through in pH readjustment pond, adjusts the pH of liquid to generation coagulating to form big flocculating body,
Form the 5th mixture.
Preferably, sodium hydroxide is put into adjust the pH of liquid into pH readjustment pond.
S6, the 5th mixture is passed through in flocculation tank, and puts into polyacrylamide and alumen ustum and is precipitated with reacting to generate,
Obtain sediment and supernatant.
The sediment that S7, collection step S6 are formed, sediment form dirty cake after dehydration.
Preferably, sediment is carried out dehydrating with filter press, forms dirty cake.
Preferably, step S7 further includes being passed through the supernatant that step S6 is formed in comprehensive wastewater treatment system to carry out unification
Processing.
Preferably, in step S7, sediment is carried out dehydrating with filter press and is formed by filtrate and is discharged into comprehensive wastewater
It is uniformly processed in processing system.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is adjusted the pH value of organic wastewater to acidity, at this time effect of the acylate in waste water because of acid by alkalinity
Film (ink) slag for generating back reaction and reverting to resin-like is precipitated, and is suspended in waste liquid, by adding ferrous sulfate in water
The colloidal solid of suspended matter carries out electrical neutralization, reduces current potential, the colloidal solid in water is made to be condensed into biggish particle rapidly, with
This simultaneously, the insoluble substance in organic wastewater can also be reacted in first time with ferrous sulfate, avoid it from emerging, thus
Achieve the purpose that dross after second step acid adding is inhibited to be precipitated, accelerates the sedimentation of particulate matter.Keep flocculation anti-by the way that NaOH is added again
Optimum PH range should be reached, and then be convenient for the precipitating of subsequent flocculant.It is eventually adding high polymer coagulant, so that the height of polymer
The effect that strand is built bridge between the particle and particle of suspension promotes particle and particle aggregation, and then acceleration is aforementioned not
The precipitating of soluble substance.Major pollutants contained by acid waste liquid are copper ion, CODCrDeng, as acid medicine use participate in it is organic
The acid out process of waste water, reaches " treatment of wastes with processes of wastes against one another ", reduces operation and adds acid solution cost.Utilize the peracid and copper ion of complexing waste water
Good sedimentation function, participate in acid out, the precipitation process of coagulation of organic wastewater, operation can be also reduced while removing pollutant and is thrown
Acid liquid cost reaches " treatment of wastes with processes of wastes against one another ", and useless cost is controlled in reduction, and the precipitating solid-liquid separation effect of organic wastewater can be improved.
The characteristics of organic wastewater, acid waste liquid in combined circuit plate production industry of the present invention, complexing three kinds of waste water of waste water,
Acid precipitation reaction is carried out using the acidity of acid waste liquid and complexing waste water and organic wastewater, while good using complexing Cu in waste water ion
Good sedimentation function, collaboration promote the precipitation reaction of organic wastewater, not only can effectively realize waste treatment and waste, reduce making for medicament
With useless cost is controlled in reduction, and is handled various wastewater simultaneously and can be saved and control useless space, is formed by substance complicated in each waste water
Complicated influences each other, and is formed by sediment and can substantially reduce when being carried out dehydrating and the problem of filter cloth blocking occurs, filters
The cloth cleaning frequency can extend to original 6 times.
Detailed description of the invention
Fig. 1 is in embodiment 1 for handling the waste water treatment system of waste water.
Specific embodiment
In order to more fully understand technology contents of the invention, combined with specific embodiments below to technical solution of the present invention
It is described further and illustrates.
Embodiment 1
The present embodiment provides the processing method of the highly concentrated waste liquid generated in a kind of manufacture of wiring board, the present embodiment passes through as schemed
Organic wastewater, complexing waste water and the acid waste liquid generated in the processing circuit plate manufacture simultaneously of waste water treatment system shown in 1.Specifically
Steps are as follows:
1, first by organic wastewater centralized collection in collecting pit.
2, the organic wastewater in collecting pit is passed through in the first acid out pond, under continuous stirring, is passed through to the first acid out pond
Waste water is complexed, forms the first mixture after mixing.
3, the first mixture in the first acid out pond is passed through in the second acid out pond, under continuous stirring, to the second acid out
Pond is passed through acid waste liquid, forms the second mixture after mixing.
4, the second mixture in the second acid out pond is passed through in third acid out pond, under continuous stirring, to third acid out
Pond puts into sulfuric acid solution so that the pH of liquid is adjusted to 2-3, and solid state gelatineous object is precipitated, and forms third mixture.
5, the third mixture in third acid out pond is passed through in coagulation reaction tank, under continuous stirring to coagulation reaction tank
Middle investment ferrous sulfate coagulant forms the 4th mixture.
6, by the 4th mixture in coagulation reaction tank be passed through pH readjustment pond in, to pH readjustment pond in investment sodium hydroxide with
The pH of liquid is adjusted to coagulating occurs to form big flocculating body, forms the 5th mixture.
7, pH is adjusted back the 5th mixture in pond to be passed through in flocculation tank, and puts into polyacrylamide to flocculate
Reaction generates alumen ustum precipitating.
8, the mixture in flocculation tank is passed through in sedimentation basin and carries out precipitation and separation, obtain sediment and supernatant.
9, the sediment in sedimentation basin is collected into sludge tank by sludge dedicated pump, supernatant collection is given up to comprehensive
It is uniformly processed in the comprehensive wastewater pond of water treatment system.
10, the sediment (sludge) in sludge tank is carried out dehydrating with filter press, forms filter cake, dehydration institute shape
At filtrate be discharged into comprehensive wastewater pond and be uniformly processed by comprehensive wastewater treatment system.
Method handles organic wastewater, complexing waste water and acid waste liquid simultaneously through this embodiment, not only can effectively realize with
It is useless to control useless, the use of medicament is reduced, useless cost is controlled in reduction, and is handled various wastewater simultaneously and can be saved and control useless space, by each
Complicated substance forms influencing each other for complexity in waste water, and appearance can be substantially reduced by being formed by be deposited in when being carried out dehydrating
The problem of filter cloth blocks.The method that existing industry handles organic wastewater is carried out dehydrating precipitating with filter press, cleaning
The period of filter cloth is usually 5 days, is carried out dehydrating with the precipitating that filter press forms method through this embodiment, and filter cloth is cleaned
Period be 30 days, the filter cloth cleaning frequency extends to original 6 times, be greatly saved pressure the mud time.In addition, in sedimentation basin
COD in clear liquidcrConcentration can decline 60-70%, the concentration of copper ion can decline 60-80%, and the present embodiment method is to sewage
Treatment effect it is suitable with the effect of existing industry method for processing organic wastewater, even more excellent, the present embodiment treated waste water symbol
The requirement for using comprehensive wastewater treatment system is closed, treated that waste water (supernatant in sedimentation basin) can be used is comprehensive through the present embodiment
It closes waste water treatment system to be uniformly processed, be discharged after up to standard.In addition, using the acid feature of complexing waste water and acid waste liquid,
The acid medicine added needed for acid precipitation reaction can be reduced, the dosage of acid medicine is reduced, effectively reduces and controls useless cost.
Embodiment 2
The present embodiment provides the processing method of the highly concentrated waste liquid generated in a kind of manufacture of wiring board, the present embodiment is handled simultaneously
The organic wastewater and acid waste liquid generated in circuit board fabrication.Specific steps compared with Example 1, mainly acid precipitation reaction part
Process flow it is different, the step of acid precipitation reaction part, is as follows: the organic wastewater in collecting pit being passed through in acid out pond, is being continued
Under stirring, the pH for being passed through acid waste liquid to liquid to acid out pond is 2-3, and solid state gelatineous object is precipitated, forms mixture.Then according to
Step 5-10 successively handles mixture in embodiment 1.
Method handles organic wastewater and acid waste liquid simultaneously through this embodiment, though acid waste liquid is utilized, in certain journey
When reducing on degree and control useless cost, but being formed by sediment and be carried out dehydrating with filter press, the problem of blocking filter cloth, is bright
It shows seriously in embodiment 1, is carried out dehydrating with the precipitating that filter press forms method through this embodiment, cleans the week of filter cloth
Phase is 5 days.
It is described above that technology contents of the invention are only further illustrated with embodiment, in order to which reader is easier to understand,
But embodiments of the present invention are not represented and are only limitted to this, any technology done according to the present invention extends or recreation, is sent out by this
Bright protection.
Claims (7)
1. a kind of processing method of the highly concentrated waste liquid generated in wiring board manufacture, which comprises the following steps:
S1, under continuous stirring, organic wastewater are uniformly mixed in the first acid out pond with complexing waste water, the first mixture of formation；
S2, under continuous stirring, the first mixture is uniformly mixed in the second acid out pond with acid waste liquid, forms the second mixing
Object；
S3, the second mixture is passed through in third acid out pond, the pH of liquid is adjusted to 2-3 under continuous stirring, solid-state glue is precipitated
Shape object forms third mixture；
S4, third mixture is passed through in coagulation reaction tank, it is mixed puts into ferrous sulfate into coagulation reaction tank under continuous stirring
Solidifying agent, forms the 4th mixture；
S5, the 4th mixture is passed through in pH readjustment pond, adjusts the pH of liquid to coagulating occurs to form big flocculating body, is formed
5th mixture；
S6, the 5th mixture is passed through in flocculation tank, and puts into polyacrylamide to react generation alumen ustum and precipitate, obtained
Sediment and supernatant；
The sediment that S7, collection step S6 are formed, sediment form dirty cake after dehydration.
2. the processing method of the highly concentrated waste liquid generated in wiring board manufacture according to claim 1, which is characterized in that step
In S3, sulfuric acid is put into third acid out pond the pH of liquid is adjusted to 2-3, solid state gelatineous object is precipitated, forms third mixture.
3. the processing method of the highly concentrated waste liquid generated in wiring board manufacture according to claim 1, which is characterized in that step
In S5, sodium hydroxide is put into adjust the pH of liquid into pH readjustment pond.
4. the processing method of the highly concentrated waste liquid generated in wiring board manufacture according to claim 1, which is characterized in that step
S7 further includes that the supernatant that step S6 is formed is discharged into comprehensive wastewater treatment system to be uniformly processed.
5. the processing method of the highly concentrated waste liquid generated in wiring board manufacture according to claim 1, which is characterized in that step
In S7, sediment is carried out dehydrating with filter press, forms dirty cake.
6. the processing method of the highly concentrated waste liquid generated in wiring board manufacture according to claim 1, which is characterized in that step
S7 further includes that the supernatant that step S6 is formed is discharged into comprehensive wastewater treatment system to be uniformly processed, and with filter press pair
Sediment is carried out dehydrating, and forms dirty cake.
7. the processing method of the highly concentrated waste liquid generated in the wiring board manufacture stated according to claim 6, which is characterized in that step S7
In, it sediment is carried out dehydrating with filter press to be formed by filtrate and be discharged into comprehensive wastewater treatment system carries out at unified
Reason.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910347797.5A CN110054317A (en) | 2019-04-28 | 2019-04-28 | A kind of processing method of the highly concentrated waste liquid generated in wiring board manufacture |
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| CN201910347797.5A CN110054317A (en) | 2019-04-28 | 2019-04-28 | A kind of processing method of the highly concentrated waste liquid generated in wiring board manufacture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929261A (en) * | 2021-10-15 | 2022-01-14 | 珠海杰赛科技有限公司 | Waste liquid treatment process |
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