CN108675569A - A kind of Lithium Battery Industry purification method for effluent - Google Patents
A kind of Lithium Battery Industry purification method for effluent Download PDFInfo
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- CN108675569A CN108675569A CN201810769846.XA CN201810769846A CN108675569A CN 108675569 A CN108675569 A CN 108675569A CN 201810769846 A CN201810769846 A CN 201810769846A CN 108675569 A CN108675569 A CN 108675569A
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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
- C02F1/52—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
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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
- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The present invention relates to a kind of Lithium Battery Industry purification method for effluent, including classification of waste storage, acidic and alkaline waste water neutralize, coagulation-flocculation precipitates and and oxygen membrane biological reaction decontamination.Using processing method associated with acid-base neutralization, coagulation-flocculation precipitation, facultative aerobic membrane bioreactor technology, the biodegradability of lithium battery waste water, simple process and low cost are improved；The combination for realizing three kinds of wastewater treatments of lithium battery manufacturing enterprise simultaneously, can handle three classes waste water, simplify technique, the equipment of reduction, the overlapping investment of medicament save operating cost simultaneously.In addition this method only simply neutralizes acid and alkaline waste water, does not add additional medicament.Acid-base accommodation first is carried out with lithium battery production waste water using the also remaining acid-base property of the waste water neutralized later, then is optionally added into acid-base modifier.Equipment and the input of medicament are saved in this way, the process for decreasing production.
Description
Technical field
The present invention relates to field of waste water treatment more particularly to a kind of useless water purification methods of Lithium Battery Industry.
Background technology
Lithium battery is more and more widely used in daily life.As a kind of energy of relative clean, it has become one
A important product battery industry development.Waste water caused by lithium battery production plant mainly has 3 classes at present.The first kind is negative and positive
The waste water containing acid, alkali generated when ion exchange resin regeneration treatment, pollutant is mainly based on pH；Second class be lithium battery production with
And the waste water of the generations such as non-conservation tank, pipeline cleaning, such waste water contain N-Methyl pyrrolidone（NMP）, Kynoar
（PVDF）, the hardly degraded organic substances such as carbon dust, there is also inorganic substances such as LiFePO4s, discharge of wastewater is intermittence, variation water quality
Larger, biochemical is poor.Third class is generated in the life of sanitary sewage, predominantly corporation eatery and worker, and major pollutants are
COD, BOD, SS and ammonia nitrogen.Water quality is relatively stable, and biodegradability is good, can promote biochemical of lithium battery waste water.
Lithium battery production waste water quality fluctuation is larger in this three classes waste water, and biochemical is poor, is difficult to handle the most.It is this kind of useless
The main processing method of liquid has：Physico-chemical process：Such as electrolysis of chemical oxidative decomposition, medicament, activated carbon adsorption and reverse osmosis technology.It is raw
Change method：Such as activated sludge process, Anaerobic biotreatment method, biofilm technology.Each method cuts both ways, relatively more normal at present
The method seen is to be combined several method, is mutually learnt from other's strong points to offset one's weaknesses, and best efficiency is played.Such as use Fenton oxidation method, coagulation heavy
It forms sediment, activated carbon adsorption filtering combination, this method should produce waste water only for lithium battery, and technique is relatively simple, and effect is good, but handles
It is of high cost, about 100 yuan of waste water medicament expense per ton；Using neutralization precipitation, coagulating sedimentation, IC anaerobic towers, hydrolysis acidification, A/O lifes
Object denitrification process, contact oxidation method combination, this method take physical chemistry with the biochemical mode being combined, and high treating effect is
System water outlet is relatively stable, but complex treatment process, waste water operating cost per ton are about 20 yuan.Therefore simple for process, treatment effect
Good, at low cost is the research direction of lithium battery production waste water.
In addition, for three classes waste water caused by lithium battery factory, current processing mode is often independent process.Per class
The a set of processing system of waste water, does not combine organically, causes the waste of equipment, the raising of cost.The especially place of acidic and alkaline waste water
Reason, conventional method is independent process at present, by acidic and alkaline waste water mix occur neutralization reaction, then regarding soda acid situation be added acid solution or
Lye is adjusted to neutrality and is discharged.The processing method has the disadvantage that：Although such waste water is mainly pH pollutions,
Including certain inorganic or organic pollution, be not processed discharge easy to produce pollution and the system need acid-base modifier into
Row is adjusted, and is often also required to be adjusted using acid-base modifier in the incipient stage in other waste water treatment process.Therefore
The technique for producing the input of repetition and repeating, increases cost.
Therefore a kind of simple for process, high treating effect, at low cost and can simultaneously remove caused by Lithium Battery Industry is provided
The Lithium Battery Industry purification method for effluent of three classes waste water is problem to be solved by this invention.
Invention content
The present invention overcomes the deficiencies in the prior art, a kind of simple for process, high treating effect, at low cost and can be simultaneously is provided
Remove the Lithium Battery Industry purification method for effluent of three classes waste water caused by Lithium Battery Industry.
In order to achieve the above objectives, the technical solution adopted by the present invention is：Provide a kind of Lithium Battery Industry purification of waste water side
Method, it is characterised in that：Include the following steps：
（1）Classification of waste stores
Lithium battery is produced into waste water, acid waste water, alkaline waste water, sanitary wastewater and is separately stored in different storage tanks；
（2）Acidic and alkaline waste water neutralizes
The acid waste water, alkaline waste water respectively enter neutralization reaction slot, and neutralization reaction, the water body after reacting occur for stirring
Into Rinsing Area, water quality is detected；
Acid-base neutralization waste water up to standard is detected, is discharged by discharge portion；
Underproof acid-base neutralization waste water is detected, into the first reactive tank；
（3）Coagulation-flocculation precipitates
Lithium battery produces waste water and enters the first reactive tank；It is described to detect underproof acid-base neutralization waste water and lithium battery production waste water
It is stirred, detects pH value；It is passed through acid-base modifier, control pH value of waste water is in 7.5-8；
Waste water enters the second reactive tank, and aluminium polychloride processing is added in the state of heating and stirring, monitors pH value；Reaction temperature
At 30-50 DEG C, pH value is controlled in 7.5-8 for degree control；
Waste water enters third reactive tank, and polyacrylamide processing is added in the state of heating and stirring, monitors pH value；Reaction temperature
At 40-60 DEG C, pH value is controlled in 6.5-7 for degree control；
Waste water enters sedimentation basin and is separated by solid-liquid separation, and sedimentation basin supernatant enters medial launder；It is dense that sedimentation basin substrate mass flow enters sludge
After the concentration of contracting slot, into sludge press filtration device press filtration at mud cake；
（4）And oxygen membrane biological reaction decontamination
Sanitary wastewater, which enters after medial launder is sufficiently mixed with the sedimentation basin supernatant, enters facultative aerobic membrane bioreactor processing；
Treated, and waste water enters clean water tank, discharge system after detection is qualified.
As a preferred embodiment, the step（1）In do not add additional acid-base accommodation reagent.
As a kind of more preferable scheme, the step（1）Neutralization reaction is 0.5-1.0h.
As a preferred embodiment, the step（2）Middle aluminium polychloride processing time 0.2-0.5h；Mixing speed controls
In 400-800rpm.
As a kind of more preferable scheme, the step（2）When middle polyacrylamide processing, mixing speed is first controlled in 300-
700rpm, mixing time 0.2-0.5h；Reduction of speed is to 100-300rpm, mixing time 1.5-2h later.
As a preferred embodiment, the step（3）Middle sedimentation basin is inclined-plate clarifying basin.
As a kind of more preferable scheme, the step（3）Middle separation of solid and liquid time control is in 2-4h.
As a kind of more preferable scheme, the step（3）Sludge after middle press filtration does outward transport landfill disposal；Sludge press filtration fills
It sets pressing filtering liquid and enters medial launder.
As a preferred embodiment, the step（4）Middle facultative aerobic membrane bioreactor processing time is 1-10h.
As a preferred embodiment, the qualified pH value of waste water of the detection is controlled in 6.5-8；COD contents are controlled 70
Mg/L or less；BOD contents are controlled in 70 mg/L or less；Ammonia-nitrogen content is controlled in 10 mg/L or less；Solid suspension content control
System is in 50 mg/L or less.
This method is using acid-base neutralization, coagulation-flocculation precipitation, facultative aerobic membrane bioreactor technology（XM-MBR）Associated with
Reason method.
Wherein coagulation-flocculation precipitation process is carried out in third-order reaction slot and sedimentation basin.Coagulation-flocculation process is industrial water
With processing procedure most basic in sanitary sewage disposal and particularly important, by adding some medicaments into water, it is difficult in water to make
With the particle of precipitation can be aggregated with one another and form colloid, then combined to form the condensate of bigger with the impurity in water body.Cohesion
Body has powerful adsorption capacity, can not only adsorb suspended matter, moreover it is possible to absorbed portion bacterium and dissolved matter.Condensate passes through suction
Attached, volume increases and sinks.Coagulation-flocculation depositing technology is with effluent quality is good, process runs well is reliable, economical and practical, behaviour
Make the advantages that easy.This method is very suitable for pre-processing lithium battery production waste water, improves facultative aerobic membrane bioreactor
Technical unit produces lithium battery the treatment effect of waste water.
Facultative aerobic membrane bioreactor technology（XM-MBR）Key be by establishing and oxygen environment, utilizing microbe symbiotic former
Reason, cultivates the composite flora that a variety of bacterium colonies such as anaerobic bacteria, facultative aerobe and aerobic bacteria coexist, and is formed using film retention enrichment highly concentrated
The microorganism species of degree, and the pollutants such as carbon (C), nitrogen (N), phosphorus (P) just become " food " of composite flora in sewage, utilize
Composite flora is metabolized pollutant removal, while food chain is formed between compound flora, and organic-biological residuum can be whole in system
It is decomposed by other bio-digestions in food chain, realizes not outer row's organic sludge in sewage disposal process.There is this method processing to imitate
Fruit is good（Water outlet can reach reuse level）, sludge yield it is small, can synchronous denitrification dephosphorizing, operation energy consumption is relatively low, operating cost is low
The advantages that.Simultaneously compared to currently a popular aerobic membrane bioreactor technology（MBR）This method reduce sludge yield coefficient,
Reduce disposal costs.It is applicable not only to processing lithium battery production waste water, and suitable for the processing of sanitary wastewater.The processing
It is the highly important link of entire method.
Acid-base neutralization processing in this method, acid waste water and alkaline waste water are only simply neutralized, do not added
Add additional medicament.The waste water neutralized is passed through the stirring of coagulation-flocculation precipitation unit together with lithium battery production waste water later,
Acid-base accommodation first is carried out with lithium battery production waste water using the also remaining acid-base property of the waste water neutralized, then is optionally added into soda acid
Conditioning agent.Equipment and the input of medicament are saved in this way, the process for decreasing production.This method is set after neutralization reaction simultaneously
Detecting step is counted, it is therefore intended that if acidic and alkaline wastewater has had reached discharge standard by detection, need not move through following two
A step and direct emission increase the flexibility of processing waste water.
During coagulation-flocculation precipitation process, this method uses coagulant polymeric aluminium chloride（PAC）, flocculant polypropylene
Amide（PAM）The combination of two analog assistants to carry out coagulation-flocculation processing to waste water.Since PAC can neutralize charge/elimination of colloid stability shape
At tiny flco, PAM enhances the adsorption bridging effect to elaioleucite in water, PAM is to water-borne glue as organic high molecular polymer
Grain have sweep across, package action.Thus it can reach more preferable compared to other auxiliary agents, inorganic PAC and organic PAM combinations
Coagulation-flocculation effect.The addition sequence of PAC and PAM is also worthy of careful study simultaneously, and it is exactly that PAC is allowed first to complete that PAC and PAM, which is used in combination,
It neutralizes charge/elimination of colloid stability to be formed after tiny flco, further increases flco volume and be conducive to fully precipitate.Therefore in order to protect
The effect of coagulation-flocculation is demonstrate,proved, the order that should be strictly added first is added PAC, adds PAM.PAC is when pH value is 7.5-8 simultaneously
Coagulation effect is best, and PAM effects when pH value is 6.5-7 are relatively good, and this method carries out pH value in reaction process stringent
Control and requirement, to improve the effect of coagulation-flocculation.In addition heating be conducive to improve intermolecular movement, promote coagulation or
Flocculated progress, therefore this system is heated when PAC and PAM is added and is reacted, and coagulation is improved with this
Or flocculated effect.But the excessively high consumption for not only resulting in multiple-energy-source of temperature, and established flco can be destroyed instead,
It is unfavorable for the progress of reaction.Therefore PAC coagulatings heating and temperature control, at 30-50 DEG C, PAM flocculation reaction heating and temperature controls exist
40-60℃.In addition the reaction time of PAC is shorter, so to stir strongly to ensure that fully reaction, mixing speed are controlled in 400-
800rpm.Mixing speed should use pattern first quick and back slow when PAM progress flocculation treatments are added, and first control mixing speed in 300-
700rpm, after stirring a period of time；Reduction of speed is to 100-300rpm later.First be soon in order to be uniformly mixed, be slowly afterwards in order to avoid
Destroy flco.
The advantageous effects of the present invention essentially consist in：There is provided a kind of simple for process, high treating effect, operating cost it is low and
The Lithium Battery Industry purification method for effluent of three classes waste water caused by Lithium Battery Industry can be removed simultaneously.
（1）This method is using processing side associated with acid-base neutralization, coagulation-flocculation precipitation, facultative aerobic membrane bioreactor technology
Method, the especially use of facultative aerobic membrane bioreactor technology improve the biodegradability of lithium battery waste water, and it is pre- to reduce lithium battery waste water
The cost of processing；Integrated artistic is simple, and investment is relatively low, and waste water operating cost is low；Processing system anti-shock loading is strong simultaneously, system
Stability is high.
（2）Compared to conventional method, this method realizes the combination of three kinds of wastewater treatments of lithium battery manufacturing enterprise, energy
Three classes waste water is handled simultaneously, simplifies technique, the equipment of reduction, the overlapping investment of medicament save operating cost.
（3）Compared to conventional method, this method is only simply neutralized acid waste water and alkaline waste water, is not added
Add additional medicament.It is passed through the stirring of coagulation-flocculation settler with together with lithium battery production waste water later, it is useless using what is neutralized
The also remaining acid-base property of water first carries out acid-base accommodation with lithium battery production waste water, then is optionally added into acid-base modifier.It saves in this way
Equipment and the input of medicament are saved, the process for decreasing production.
（4）This method provides the sequences for first plus after PAC adding PAM, the effect of coagulation-flocculation precipitation are improved, to improve
The effect of purification of waste water.It is different from conventional method simultaneously, this method carries out heat treatment and stringent during coagulation-flocculation
The pH value and mixing speed of control system, for coagulation-flocculation process carry out provide good environmental condition, help to carry
The clean-up effect of high final waste water.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the preferred embodiment of the present invention.
In figure：1 it is lithium battery production wastewater storage tank, 101 be the first liquid pump, 2 be alkaline waste water storage tank, 3 is acid waste water
Storage tank, 4 be life wastewater storage tank, 401 be the second liquid pump, 51 be neutralization reaction slot, 511 be neutralization reaction slot agitating device, 512
For neutralization reaction slot pH detection devices, 513 be neutralization reaction slot alkalinity inlet, 514 be neutralization reaction slot acidity inlet,
515 it is neutralization reaction slot liquid outlet, 52 be the first Rinsing Area, 521 be the 4th liquid pump, 53 be the first water purification discharge pipe, 531 is
One water purification discharge pipe sewage detection device, 61 for the first reactive tank, 611 be the first chemicals dosing plant, 613 be the first reactive tank stirring
Device, 614 be the first reactive tank pH detection devices, 62 be the second reactive tank, 621 be the second chemicals dosing plant, 622 be the second reaction
Slot heater, 623 be the second reactive tank agitating device, 624 be the second reactive tank pH detection devices, 63 be third reactive tank, 631
It is third reactive tank heater for third chemicals dosing plant, 632,633 be third reactive tank agitating device, 634 is third reactive tank
PH detection devices, 635 be the 4th chemicals dosing plant, 64 be sedimentation basin, 65 be medial launder, 651 be medial launder agitating device, 652 be
Medial launder pH detection devices, 53 be the 5th liquid pump, 66 be sludge press filtration device, 67 be sludge concentration tank, 671 be sludge pump, 71
It is third liquid pump for facultative aerobic membrane bioreactor, 711,712 be film process layer, 72 be the second clean water tank, 721 is the second clean water tank
Sewage detection device, 73 are the second water purification discharge pipe device.
Specific implementation mode
Presently in connection with drawings and examples, the present invention is described in further detail, these attached drawings are simplified signal
Figure, the basic structure of the invention will be illustrated schematically only, therefore it only shows the composition relevant to the invention.
The water purification method as shown in Figure 1, a kind of Lithium Battery Industry gives up, includes the following steps：
The waste water that lithium battery manufacturing enterprise generates（Lithium battery produces waste water, acidic and alkaline wastewater, sanitary wastewater）Classify storage
It is produced in wastewater storage tank 1, alkaline waste water storage tank 2, acid waste water storage tank 3, sanitary wastewater storage tank 4 in lithium battery.
Acidic and alkaline wastewater gravity flow enters neutralization reaction slot 51, neutralized reaction（It is not required to additionally add acid-base accommodation reagent）
After 0.5h, water body gravity flow enter the first Rinsing Area 52, by the first water purification discharge pipe sewage detection device 531 detect it is up to standard after by
For the first water purification discharge pipe discharge 53.Standard up to standard is that pH value of waste water is controlled in 6.5-8；COD contents control 70 mg/L with
Under；BOD contents are controlled in 70 mg/L or less；Ammonia-nitrogen content is controlled in 10 mg/L or less；Solid suspension content is controlled 50
Mg/L or less.
First reactive tank 61 is entered under the action of the 4th liquid pump 521 by pipeline if detection is unqualified.Lithium electricity simultaneously
Pond produces waste water and also enters the first reactive tank 61, and the two stirring is sufficiently mixed.Detect pH value, the first chemicals dosing plant 611 to first
Reactive tank 61 is passed through acid-base modifier, and control pH value of waste water is in 7.5-8.Into the second reactive tank 62, is heating and stirring strongly
In the state of PAC be added carry out coagulating treatment 0.5h, while pH value is monitored, since the reaction time of PAC is shorter, so strong
To ensure fully to react, mixing speed is controlled in 400-800rpm for stirring.Enter third reactive tank 63 later, is heating and stirring
In the state of be added PAM carry out flocculation treatment.Mixing speed first controls mixing speed in 300- using pattern first quick and back slow
700rpm stirs 0.5h；Reduction of speed is to 100-300rpm, mixing time 1.5h later.First be soon in order to be uniformly mixed, be slowly afterwards for
Avoid damage to flco.PH value is monitored simultaneously, acid-base modifier is added by the 4th chemicals dosing plant 635, control system pH value exists
6.5-7。
Separation of solid and liquid 2-4h is carried out into inclined-plate clarifying basin 64 later, the gravity flow of 64 supernatant of sedimentation basin enters medial launder 65.
Sedimentation basin underflow flows into sludge concentration tank 67, enters sludge press filtration device 66 later and carries out press filtration.The outward transport of bed mud cake is filled out after press filtration
Bury disposition；66 press filtration water of sludge press filtration device flows into medial launder 65.
Sanitary wastewater, which flows into after medial launder 65 is sufficiently mixed with the supernatant flowed by sedimentation basin 64, enters simultaneous oxygen film biology
Reactor 71.Facultative aerobic membrane bioreactor 71 is by establishing and oxygen environment, using microbe symbiotic principle, cultivate anaerobic bacteria,
The composite flora that a variety of bacterium colonies such as facultative aerobe and aerobic bacteria coexist is enriched in film process layer 712 using film crown_interception and forms height
The microorganism species of concentration, and the pollutants such as carbon (C), nitrogen (N), phosphorus (P) just become " food " of composite flora in sewage, profit
It is metabolized pollutant removal with composite flora, while forming food chain between compound flora, organic-biological residuum can be complete in system
Portion is decomposed by other bio-digestions in food chain, realizes not outer row's organic sludge in sewage disposal process.After handling 1-10h,
Second clean water tank 72 detects discharge system after qualification.
The waste gas cleaning system for being suitble to this method is described below：
As shown in Figure 1, a kind of Lithium Battery Industry waste water purification system, including it is acid-base neutralization unit, coagulation-flocculation precipitation unit, simultaneous
Oxygen membrane biological reaction unit and lithium battery production wastewater storage tank 1, alkaline waste water storage tank 2, acid waste water storage tank 3, sanitary wastewater
Storage tank 4.
Wherein acid-base neutralization unit includes neutralization reaction slot 51, the first Rinsing Area 52；Alkaline waste water storage tank 2, acid waste water
Storage tank 3 is connected by pipeline with the alkaline inlet 513 of neutralization reaction slot 51, acid inlet 514 respectively；Neutralization reaction slot 51
It is provided with agitating device 511 and pH detection devices 512.First Rinsing Area 52 passes through pipeline and 51 liquid outlet of neutralization reaction slot
515 are connected；First Rinsing Area 52 is also connected with the first water purification discharge pipe 53, and the first water purification discharge pipe 53 is provided with sewage detection dress
Set 531.
Coagulation-flocculation precipitation unit include the first reactive tank 61, the second reactive tank 62, third reactive tank 63, sedimentation basin 64,
Medial launder 65；Five are sequentially connected by pipeline.
First reactive tank 61 produces wastewater storage tank 1 with lithium battery by pipeline and is connected, and is arranged on pipeline between the two
There is the first liquid pump 101；Medial launder 65 is connected by pipeline with sanitary wastewater storage tank 4, and is provided on pipeline between the two
Two liquid pumps 401.
First reactive tank 61 is acid-base reaction slot, passes through pipeline and the first chemicals dosing plant for being loaded with acid-base modifier
611 are connected；The first reactive tank 61 is additionally provided with agitating device 613 and pH detection devices 614 simultaneously.
Second reactive tank 62 is aluminium polychloride（PAC）Reactive tank by pipeline and is loaded with coagulant polymeric chlorination
Second chemicals dosing plant 621 of aluminium is connected；Second reactive tank 62 is additionally provided with agitating device 623 and pH detection devices 624.
Second reactive tank 62 is additionally provided with heater 622.
Third reactive tank 63 is polyacrylamide（PAM）Reactive tank by pipeline and is loaded with flocculant polyacrylamide
The third chemicals dosing plant 631 of amine is connected；Third reactive tank 63 is additionally provided with agitating device 633 and pH detection devices 634.
Third reactive tank 63 is additionally provided with heater 632.In addition third reactive tank 63 also connects the 4th chemicals dosing plant 635 by pipeline..
Sedimentation basin 64 is inclined-plate clarifying basin, is filled successively with sludge concentration tank 67, sludge pump 671, sludge press filtration by pipeline
66 are set to be connected.Medial launder 65 is provided with agitating device 651, pH detection devices 652.
And oxygen membrane biological reaction unit includes facultative aerobic membrane bioreactor 71, the second clean water tank 72, the two passes through pipeline phase
Connection, and third liquid pump 711 is set on pipeline.Sewage detection device 721, outlet connection second is arranged in second clean water tank 72
Water purification discharge pipe 73.
In addition the first Rinsing Area 52 in acid-base neutralization unit is anti-by first in pipeline and coagulation-flocculation precipitation unit
It answers slot 61 to be connected, and the 4th liquid pump 521 is set on pipeline；Medial launder 65 in coagulation-flocculation precipitation unit by pipeline with
And the facultative aerobic membrane bioreactor 71 in oxygen membrane biological reaction unit is connected, and the 5th liquid pump 653 is set on pipeline.
Based on the above description of the preferred embodiments of the present invention, through the above description, related personnel completely can be with
Without departing from the scope of the technological thought of the present invention', various changes and amendments are carried out.The technical scope of this invention
It is not limited to the contents of the specification, it is necessary to determine the technical scope according to the scope of the claims.
Claims (10)
1. a kind of Lithium Battery Industry purification method for effluent, it is characterised in that：Include the following steps：
（1）Classification of waste stores
Lithium battery is produced into waste water, acid waste water, alkaline waste water, sanitary wastewater and is separately stored in different storage tanks；
（2）Acidic and alkaline waste water neutralizes
The acid waste water, alkaline waste water respectively enter neutralization reaction slot, and neutralization reaction, the water body after reacting occur for stirring
Into Rinsing Area, water quality is detected；
Acid-base neutralization waste water up to standard is detected, is discharged by discharge portion；
Underproof acid-base neutralization waste water is detected, into the first reactive tank；
（3）Coagulation-flocculation precipitates
Lithium battery produces waste water and enters the first reactive tank；It is described to detect underproof acid-base neutralization waste water and lithium battery production waste water
It is stirred, detects pH value；It is passed through acid-base modifier, control pH value of waste water is in 7.5-8；
Waste water enters the second reactive tank, and aluminium polychloride processing is added in the state of heating and stirring, monitors pH value；Reaction temperature
At 30-50 DEG C, pH value is controlled in 7.5-8 for degree control；
Waste water enters third reactive tank, and polyacrylamide processing is added in the state of heating and stirring, monitors pH value；Reaction temperature
At 40-60 DEG C, pH value is controlled in 6.5-7 for degree control；
Waste water enters sedimentation basin and is separated by solid-liquid separation, and sedimentation basin supernatant enters medial launder；It is dense that sedimentation basin substrate mass flow enters sludge
After the concentration of contracting slot, into sludge press filtration device press filtration at mud cake；
（4）And oxygen membrane biological reaction decontamination
Sanitary wastewater, which enters after medial launder is sufficiently mixed with the sedimentation basin supernatant, enters facultative aerobic membrane bioreactor processing；
Treated, and waste water enters clean water tank, discharge system after detection is qualified.
2. Lithium Battery Industry purification method for effluent according to claim 1, it is characterised in that：The step（1）In do not add
Add additional acid-base accommodation reagent.
3. Lithium Battery Industry purification method for effluent according to claim 2, it is characterised in that：The step（1）It neutralizes anti-
It should be 0.5-1.0h.
4. Lithium Battery Industry purification method for effluent according to claim 1, it is characterised in that：The step（2）Middle polymerization
Aluminium chloride processing time 0.2-0.5h；Mixing speed is controlled in 400-800rpm.
5. Lithium Battery Industry purification method for effluent according to claim 4, it is characterised in that：The step（2）In poly- third
When acrylamide processing, mixing speed is first controlled in 300-700rpm, mixing time 0.2-0.5h；Reduction of speed is to 100- later
300rpm, mixing time 1.5-2h.
6. Lithium Battery Industry purification method for effluent according to claim 1, it is characterised in that：The step（3）Middle precipitation
Pond is inclined-plate clarifying basin.
7. Lithium Battery Industry purification method for effluent according to claim 6, it is characterised in that：The step（3）Middle solid-liquid
Disengaging time is controlled in 2-4h.
8. Lithium Battery Industry purification method for effluent according to claim 7, it is characterised in that：The step（3）Middle press filtration
Sludge afterwards does outward transport landfill disposal；Sludge press filtration device pressing filtering liquid enters medial launder.
9. Lithium Battery Industry purification method for effluent according to claim 1, it is characterised in that：The step（4）In and oxygen
The Membrane Bioreactor for Wastewater Treatment time is 1-10h.
10. according to any Lithium Battery Industry purification method for effluent of claim 1-9, it is characterised in that：The detection is closed
The pH value of waste water of lattice is controlled in 6.5-8；COD contents are controlled in 70 mg/L or less；BOD contents are controlled in 70 mg/L or less；Ammonia
Control of Nitrogen Content is in 10 mg/L or less；Solid suspension content is controlled in 50 mg/L or less.
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| CN113636683A (en) * | 2021-08-18 | 2021-11-12 | 塔里木大学 | Inorganic chemistry experiment sewage treatment plant |
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