CN209619059U - A kind of system handling high toxicity high-COD waste water - Google Patents
A kind of system handling high toxicity high-COD waste water Download PDFInfo
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- CN209619059U CN209619059U CN201920016239.6U CN201920016239U CN209619059U CN 209619059 U CN209619059 U CN 209619059U CN 201920016239 U CN201920016239 U CN 201920016239U CN 209619059 U CN209619059 U CN 209619059U
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Abstract
The utility model discloses a kind of systems for handling high toxicity high-COD waste water, and the system comprises the dosing aerating system I being sequentially communicated, dosing aerating system II, RO film concentration systems I, electrolytic cell.The system of the utility model removes heavy metal by the method for second level dosing, and by treated, waste water is concentrated, and is electrolysed to the waste water after concentration, and recycles electrolyte with the method that film is concentrated.By the various organic matter degradations in high-COD waste water and heavy metal is removed, achieve the purpose that advanced treating, the system operatio of the utility model is simple, can effectively by waste water toxic metal ions and high COD organic matter remove, achieve the purpose that depth degradation in the short time, and realizes the recycling of resource.
Description
Technical field
The utility model relates to pollutant process technical fields, and in particular to a kind of processing high toxicity high-COD waste water is
System.
Background technique
High toxicity high-COD waste water, not only containing the toxic heavy metal of high concentration, such as Cr6+、Cd2+、Cr3+Deng also containing big
The hardly degraded organic substance and biotic component of amount, the usual > 10000 of the value of COD are even higher.Since different types of high COD is useless
The component difference of water is huge, and conventional single method for treating water, is usually only capable of being handled for the waste water of frozen composition, because
This, at this stage, the processing to this kind of waste water, there is no fixed unified methods, it usually needs, can be true after determining main component
Determine treatment process.This also virtually increases processing cost and processing difficulty.
Currently, being mainly the following processing method for high-COD waste water:
(1) absorption method.This method is mainly the material with various large specific surface areas, pollutant is adsorbed onto hole, to reach
To the purpose of removal pollutant.Its investment and operating cost is lower.But due to adsorbent material limited sorption capacity, and inhale
Material after attached saturation is difficult to secondary use.Therefore, this method is only applicable to the processing of low COD waste water.
(2) oxidizing process.This method is mainly the chemical agent by adding strong oxidizing property, such as H2O2、KMnO4, Fenton examination
Organic matter or microorganism conversion are less toxic, tractable small molecule compound by agent etc..Its reaction speed is fast, treatment effeciency
Height, and the advanced treating of high-COD waste water can be used for.But it needs to consume a large amount of chemical agent, it is also necessary to subsequent height
Salt waste water is further processed.Therefore typically cost is higher.
(3) extraction.This method mainly uses organic solvent, and pollutant is transferred in organic solvent, pollution is reached
The purpose that object is separated from water.Its investment is less, easy to operate, high-efficient, and can also recovery section utility.But it is not
Polar organic matter can be handled, and organic solvent extracted needs the method by being stripped to be recycled, to reduce technique
Material Cost.In addition, organic solvent usually has certain bio-toxicity.
(4) evaporation.This method is mainly to evaporate the method for water, and pollutant be concentrated and divides isolated method.
Its is easy to operate, technical maturity, moreover it is possible to which recovery section crystallizes salts substances, therefore is suitble to processing salt-containing organic wastewater.But it
The shortcomings that be that energy consumption is very big, and need that the organic pollutant evaporated in evaporation process is further processed, to prevent
Only secondary pollution.Therefore it is not suitable for the processing of low boiling point organic wastewater.
Utility model content
The purpose of the utility model is to overcome providing in place of the shortcomings of the prior art, a kind of high COD of high toxicity is useless
The system of water process, the system first passes through adding method thereof and removes heavy metal, and by treated, waste water is concentrated, and is then added
Enter electrolyte, the waste water after concentration is electrolysed, and recycles electrolyte with the method that film is concentrated.
To achieve the above object, the technical solution that the utility model is taken are as follows:
A kind of system handling high toxicity high-COD waste water the system comprises the dosing aerating system I being sequentially communicated, adds
Medicine aerating system II, RO film concentration systems I, electrolytic cell.
System described in the utility model is first by high toxicity high-COD waste water (COD > 20000mg/L, and contain high concentration
Toxic heavy metal ion Cr6+、Cd2+And Cr3+) pass through dosing aerating system I removing Cd therein2+, and by Cr6+Completely
It is reduced to Cr3+, and remaining Cr is removed by dosing aerating system II3+、Fe2+And Fe3+, metal ion after reaction, in waste water
It is substantially eliminated, is only left high concentration COD, then be electrolysed, since waste water water is big, carried out if directlying adopt conventional electrode
Electrolysis, then power consumption is larger.Therefore, the utility model passes through RO film concentration in dosing aerating system II, by waste water
10-15 times of concentration, the concentrated water after 2h is concentrated are directly entered electrolysis, COD > 200000-300000mg/L, by concentration 6-8 times
Water inlet after, can be directly electrolysed.The number that can significantly reduce electrolysis after concentration technique reaches reduction electricity
Can purpose (electric energy be only original 1/5 or so).
The utility model removes heavy metal by the method for second level dosing, and waste water is concentrated by treated, to dense
Waste water after contracting is electrolysed, and by the various organic matter degradations in high-COD waste water and is removed heavy metal, is reached advanced treating
Purpose.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, the electrolytic cell are to add
Enter nanoscale active carbon particle, forms the electrolytic cell of countless three-diemsnional electrodes.The electrolytic cell or/and for using cobaltous sulfate as electrolysis
Liquid, and the electrolytic cell being electrolysed under the action of electric field.
Due to the excessive concentration of COD, in order to improve electrolytic efficiency, the utility model uses two kinds of modified measures, first is that
Nanoscale active carbon particle is added in electrolyte, forms countless three-diemsnional electrodes, (positive and negative electrode material+particle microelectrode), instead of
Two original electrode methods.Within the same time, electrolytic efficiency about 30-40% can be improved；Second is that being added in waste water
Cobaltous sulfate electrolyte (CoSO4, wt%=2.5), in the effect of electric field (U=24V, I=4~6A), by Co2+It is oxidized to Co3+, and
Co3+With certain oxidisability, under the action of electric current, energy oxidation of organic compounds, therefore degradation efficiency can be significantly improved.Reaction side
Formula is as follows:
2Co2+-2e-=2Co3+；
Co3++CxHyOz→Co2++CO2+H2O；
Within the same time, electrolytic efficiency about 20-30% can be improved.It uses when the two is synchronous, can be mentioned in the unit time
High electrolytic efficiency about 55%-75%；To be CO by various organic matter degradations2Or small-molecule substance, realize going for high COD
It removes.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, the active carbon particle
Partial size is 10~20 μm, and the cobaltous sulfate electrolyte quality concentration is 2.4~3.0%, and the current field condition is U=24V, I=4
~6A.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, dosing aeration system
System I is that the medicament of addition is excessive FeSO4, it is not open close enter compressed air dosing aerating system I, dosing aeration system
System II is the dosing aerating system II that the medicament of addition is NaOH.
Cd medicament is removed used in the utility model, is FeSO4, rather than common Na at this stage2S.The reason is that
Na2S price is high, and H can be discharged in practical application2S gas, be easy to cause secondary pollution.And FeSO4Mostly industrial waste, inexpensively
It being easy to get, removal effect is good, and it is without secondary pollution, and excessive Fe2+It can be removed by subsequent dosing.
The utility model is by adding excessive FeSO4(1.5~2 times of theoretical amount), it is not open close enter compressed air,
To completely remove Cd therein2+, and by Cr6+It is reduced to Cr completely3+.Its reaction equation are as follows:
2Fe2++Cd2++2O2=Fe2CdO4↓；
3Fe2++Cr6+=Cr3++3Fe3+；
After reacting 1.5~2h, Cd2+Ion is completely removed, Cr6+It is reduced to Cr completely3+。
In order to remove remaining Cr3+、Fe2+And Fe3+, it need to be NaOH by the further agent-feeding treatment of waste water, institute's adding medicine,
Reaction equation are as follows:
Cr3++3OH-=Cr (OH)3↓；
Fe3++3OH-=Fe (OH)3↓；
4Fe2++8OH-+O2+2H2O=4Fe (OH)3↓；
After reacting 30~45min, the metal ion in waste water is removed substantially, is only left high concentration COD.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, the electrolytic cell go out
The mouth of a river is communicated with RO film concentration systems II.
In order to recycle CoSO4Electrolyte, the utility model are additionally provided with RO film concentration systems II, will locate after electrolysis process
Water after reason is concentrated to electrolyte original concentration.Production water after concentration carries out subsequent biochemical treatment, concentrated water (CoSO4Electrolyte)
It returns in electrolyte storage tank, achievees the purpose that resource recycling.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, the electricity of the electrolytic cell
Solution liquid inlet communication has electrolyte storage tank, the RO film concentration systems II concentrated water outlet electrolyte storage tank.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, RO film concentration systems I's
Production water water outlet after concentration is connected to water storage tank is produced.
The preferred embodiment of system as the utility model processing high toxicity high-COD waste water, the connection is using pipe
Road connection, the pipeline are equipped with control valve.
The utility model has the beneficial effects that: the system of processing high toxicity high-COD waste water provided by the utility model, it should
System removes heavy metal by the method for second level dosing, and by treated, waste water is concentrated, and electrolyte is then added, to dense
Waste water after contracting is electrolysed, and recycles electrolyte with the method that film is concentrated.It is by the various organic matter degradations in high-COD waste water
CO2Or small-molecule substance, and toxic metal ions are removed by the method for precipitating；Achieve the purpose that advanced treating, this is
Unite easy to operate, can effectively by waste water toxic metal ions and high COD organic matter remove, reach depth in the short time
The purpose of degradation, and realize the recycling of resource.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
In figure: 1, composite waste storage tank, 10, pipeline, 11, control valve；2, dosing aerating system I；3, dosing aerating system
II；4, RO film concentration systems I；5, electrolytic cell；6, water storage tank is produced；7, RO film concentration systems II；8, electrolyte storage tank；9, water is produced
Case.
Specific embodiment
To better illustrate the purpose of this utility model, technical solution and advantage, below in conjunction with specific embodiment to this
Utility model is described further.
Embodiment
The utility model handles the embodiment of the system of high toxicity high-COD waste water, as shown in Figure 1, described in the present embodiment
Reason high toxicity high-COD waste water system include the composite waste storage tank 1 being sequentially communicated by pipeline 10, dosing aerating system I 2,
Dosing aerating system II 3, RO film concentration systems I 4, electrolytic cell 5, RO film concentration systems II7, water producing tank 9.It is concentrated by RO film
Production water water outlet after system I 4 is concentrated is connected to water storage tank 6 is produced, and the electrolyte inlet of electrolytic cell 5 is communicated with electrolyte storage tank
8, RO film concentration systems II7 concentrated water outlet electrolyte storage tanks 8 the, so that concentrated water (CoSO of RO film concentration systems II74Electrolysis
Liquid) it returns in electrolyte storage tank, achieve the purpose that resource recycling.The pipeline that two adjacent devices are directly connected to
It is equipped with control valve 11.
The system of processing high toxicity high-COD waste water described in the utility model in use, waste water in composite waste storage tank 1,
Its COD > 20000mg/L, and the toxic heavy metal ion Cr containing high concentration6+、Cd2+And Cr3+.It therefore, first will mixing
Waste water in wastewater storage tank 1 is by dosing aerating system I, by adding excessive FeSO toward dosing aerating system I4(theory is used
Amount 1.5~2 times), it is not open close enter compressed air, to completely remove Cd therein2+, and by Cr6+It is reduced to Cr completely3+.Its
Reaction equation are as follows:
2Fe2++Cd2++2O2=Fe2CdO4↓；
3Fe2++Cr6+=Cr3++3Fe3+；
After reacting 1.5~2h, Cd2+Ion is completely removed, Cr6+It is reduced to Cr completely3+.In order to remove remaining Cr3 +、Fe2+And Fe3+, it need to be by waste water again by a set of dosing aerating system II, institute's adding medicine is NaOH, reaction equation are as follows:
Cr3++3OH-=Cr (OH)3↓；
Fe3++3OH-=Fe (OH)3↓；
4Fe2++8OH-+O2+2H2O=4Fe (OH)3↓；
After reacting 30~45min, the metal ion in waste water is removed substantially, is only left high concentration COD.Due to waste water water
Amount is big, is electrolysed if directlying adopt conventional electrode, power consumption is larger.Therefore, the utility model is additionally provided with RO film
Concentration systems I 4, by 15~20 times of Waste water concentrating, the concentrated water after 1.5~2.5h is concentrated is directly entered electrolytic cell 5, COD >
200000-300000mg/L can be directly electrolysed after concentration 6~8 times water inlets, be electrolysed 4~5h.It is dense due to COD
Height is spent, in order to improve electrolytic efficiency, the utility model uses two kinds of modified measures, first is that nanometer is added in electrolytic cell 5
The active carbon particle (partial size is 10~20 μm) of grade, forms countless three-diemsnional electrodes, to improve current efficiency；Second is that adding in waste water
Enter cobaltous sulfate electrolyte (CoSO4, wt%=2.4~3.0), in the effect of electric field (U=24V, I=4~6A), by Co2+Oxidation
For Co3+, and Co3+With certain oxidisability, under the action of electric current, energy oxidation of organic compounds, therefore degradation effect can be significantly improved
Rate.Reaction equation is as follows:
2Co2+-2e-=2Co3+；
Co3++CxHyOz→Co2++CO2+H2O；
In addition, in order to recycle CoSO4Electrolyte, the utility model are additionally provided with RO film concentration systems after 5 device of electrolytic cell
II 7 carries out 1~2h of concentration, and by treated, water is concentrated to electrolyte original concentration.Production water after concentration carries out subsequent
Biochemical treatment, concentrated water (CoSO4Electrolyte) it returns in electrolyte storage tank, achieve the purpose that resource recycling.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model rather than to this realities
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is common
It will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this reality
With the spirit and scope of new technique scheme.
Claims (9)
1. a kind of system for handling high toxicity high-COD waste water, which is characterized in that the system comprises the dosing being sequentially communicated aerations
System I, dosing aerating system II, RO film concentration systems I, electrolytic cell.
2. the system of processing high toxicity high-COD waste water according to claim 1, which is characterized in that the electrolytic cell is to add
Enter nanoscale active carbon particle, forms the electrolytic cell of countless three-diemsnional electrodes.
3. it is according to claim 2 processing high toxicity high-COD waste water system, which is characterized in that the electrolytic cell or/and
For using cobaltous sulfate as electrolyte, and the electrolytic cell being electrolysed under the action of electric field.
4. the system of processing high toxicity high-COD waste water according to claim 2, which is characterized in that the active carbon particle
Partial size is 10~20 μm, and the cobaltous sulfate electrolyte quality concentration is 2.4~3.0%, and the current field condition is U=24V, I=4
~6A.
5. the system of processing high toxicity high-COD waste water according to claim 1, which is characterized in that dosing aerating system I is
The medicament of addition is excessive FeSO4, it is not open close enter compressed air dosing aerating system I, the dosing aerating system II
The dosing aerating system II that medicament for addition is NaOH.
6. the system of processing high toxicity high-COD waste water according to claim 1, which is characterized in that the electrolytic cell goes out
The mouth of a river is communicated with RO film concentration systems II.
7. the system of processing high toxicity high-COD waste water according to claim 6, which is characterized in that the electricity of the electrolytic cell
Solution liquid inlet communication has electrolyte storage tank, the RO film concentration systems II concentrated water outlet electrolyte storage tank.
8. the system of processing high toxicity high-COD waste water according to claim 1, which is characterized in that RO film concentration systems I's
Production water water outlet after concentration is connected to water storage tank is produced.
9. the system of processing high toxicity high-COD waste water according to any one of claims 1 to 8, which is characterized in that the company
Logical to be connected to using pipeline, the pipeline is equipped with control valve.
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| CN201920016239.6U CN209619059U (en) | 2019-01-02 | 2019-01-02 | A kind of system handling high toxicity high-COD waste water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113698031A (en) * | 2021-08-10 | 2021-11-26 | 广西贵港市蓝月亮水处理环保科技有限公司 | Method and equipment for recovering precious metals from comprehensive wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113698031A (en) * | 2021-08-10 | 2021-11-26 | 广西贵港市蓝月亮水处理环保科技有限公司 | Method and equipment for recovering precious metals from comprehensive wastewater |
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Effective date of registration: 20230529 Address after: Room 606, No. 69, Xincheng Middle Road, Jiekou Street, Conghua District, Guangzhou, Guangdong 510999 Patentee after: Guangdong Shangchen Environmental Technology Co.,Ltd. Address before: 510000 room 363, building 4, No. 3, middle Qianjin Road, Aotou Town, Conghua, Guangzhou, Guangdong Patentee before: GUANGDONG YEANOVO ENVIRONMENTAL PROTECTION Co.,Ltd. |
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