CN106698750A - Electroplating wastewater reclaimed water recycling process and system - Google Patents
Electroplating wastewater reclaimed water recycling process and system Download PDFInfo
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- CN106698750A CN106698750A CN201611236109.0A CN201611236109A CN106698750A CN 106698750 A CN106698750 A CN 106698750A CN 201611236109 A CN201611236109 A CN 201611236109A CN 106698750 A CN106698750 A CN 106698750A
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- water
- concentrated water
- electroplating wastewater
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- filtration
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an electroplating wastewater reclaimed water recycling process which is characterized by comprising the following steps: performing sand filtration or ultra-filtration on wastewater to be treated at least twice, feeding into a reverse osmosis system, collecting and depositing concentrated water treated by using the reverse osmosis system, discharging and/or combining into the wastewater to be treated, and performing further treatment, wherein the reagent for the deposition treatment is a heavy metal chelating agent. By adopting the electroplating wastewater reclaimed water recycling process, sewage blocking of the reverse osmosis system can be remarkably reduced, and the system recycling rate can be remarkably increased.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment and apparatus field, in particular it relates to a kind of electroplating wastewater reclaimed water is returned
With technique and system.
Background technology
Although Electroplate Factory after heavy metal and organic wastewater treatment containing can reach discharging standards, because water is big,
Country to enterprise water use requirement and energy-saving and emission-reduction and the reason for, can typically select part preferably water quality carries out reuse production, such as clear
Wash waste water.And the main technique of its reuse is generally counter-infiltration.Although reclaimed water can qualified discharge, its composition is still sufficiently complex, electricity
Conductance is high and hardness, metal ion, turbidity and COD can not reach reverse osmosis membrane inflow requirement, easily causes the tight of membranous system
Weight is dirty stifled or aoxidizes.Cleaning difficulty, system processing cost are high after dirt is stifled, and this is always the difficult point and emphasis of Treated sewage reusing.
In existing process, reclaimed water generally uses sand filtration or counter-infiltration is arrived in ultrafiltration again, is saving water resource, typically produces system
Water rate reaches more than 50%, single branch film standardization aquifer yield in more than 0.5T/h, and concentrated water understands partial reflux to sand filtration or ultrafiltration
At water inlet, part qualified discharge.If (being more than the 15% of inflow) when larger using the method NF concentrated water reuse amount, system can be caused
Influent quality worse and worse, block up by the dirt for ultimately resulting in film.If discharge water is larger, the rate of recovery of system does not reach requirement again, and
No matter both the above method, the dirt of system is stifled all to be certainly existed and cleans difficulty.
The content of the invention
It is contemplated that overcoming drawbacks described above, there is provided one kind can obviously reduce counter-infiltration system dirt and block up and the system rate of recovery
The technique that can be significantly improved again.
A kind of electroplating wastewater Treated sewage reusing technique that the present invention is provided, it is characterised in that：Pending waste water is through at least twice
Enter counter-infiltration system after sand filtration or ultrafiltration, the concentrated water after being processed through counter-infiltration system, through collecting with after precipitation process, is discharged
And/or integrate with and reprocessed in pending waste water；
Wherein, the reagent for above-mentioned precipitation process is heavy metal chelating agent.
The process can be all to be discharged, i.e., concentrated water is when reaching certain index, is directly discharged；
The process can also be that the concentrated water after precipitation is incorporated into pending waste water to be reprocessed, until concentrated water reaches necessarily
Concentration or parameter index (such as：Continue in the case that Treatment for Reuse can influence system lifetim or efficiency etc.) after discharged again
Action.
The process can also be the scheme of partial discharge part reprocessing, such as：The ratio of discharge and reprocessing is 1:0.1-
10.
Further, the present invention provide a kind of electroplating wastewater Treated sewage reusing technique, also with it is such the characteristics of：I.e., on
The waste water into counter-infiltration system after sand filtration at least twice or ultrafiltration is stated, turbidity is less than 1NTU, and SDI is less than 5.
Further, the present invention provide a kind of electroplating wastewater Treated sewage reusing technique, also with it is such the characteristics of：I.e., on
The rate of recovery for stating counter-infiltration system is 35-40%.General is 0.3-0.4T/h from single branch film aquifer yield.
Further, the present invention provide a kind of electroplating wastewater Treated sewage reusing technique, also with it is such the characteristics of：I.e., on
Heavy metal chelating agent is stated for SDD.
Further, the present invention provide a kind of electroplating wastewater Treated sewage reusing technique, also with it is such the characteristics of：I.e., on
The addition for stating heavy metal chelating agent is 0.1-10 mg/litres.
Further, the present invention provide a kind of electroplating wastewater Treated sewage reusing technique, also with it is such the characteristics of：I.e., on
State discharge be through precipitation process it is up to standard after directly discharge；
Or
Above-mentioned discharge is disposably drained when concentrated water concentration reaches setting value.The setting value can be according to entering the need for system
Row setting, after concentrated water multiple circular treatment, its concentration necessarily reaches again flow back or flow back can produce serious dirty block up etc.
It is bad when the situation of system, it is contemplated that the treatment for directly discharging such concentrated water.The discharge is actual to refer to treatment to feelings up to standard
Condition is carried out in line or drains into the post processing before Sewage Disposal is discharged.
In addition, present invention also offers a kind of electroplating wastewater intermediate water reuse system, it is characterised in that：Including the side along current
To cleaning wastewater collection pond, filtration system one, filtration system two, counter-infiltration system, concentrated water collecting pit, the concentrated water for setting gradually
Sedimentation basin；
Above-mentioned cleaning wastewater collection pond, for collecting pending reclaimed water；
Above-mentioned filtration system one is sand filtration or ultrafiltration system, for carrying out first time filtering to pending reclaimed water；
Above-mentioned filtration system two is sand filtration or ultrafiltration system, for carrying out second filtering to pending reclaimed water；
Above-mentioned counter-infiltration system, the waste water after being filtered to second is processed；
Above-mentioned concentrated water collecting pit, for collecting the concentrated water after being processed through counter-infiltration system；
Above-mentioned concentrated water sedimentation basin, is inside provided with heavy metal chelating agent, for carrying out precipitation process to concentrated water；
Recycle-water after above-mentioned precipitation process, cleaning wastewater collection pond is entered by reuse passage.
Further, a kind of electroplating wastewater intermediate water reuse system that the present invention is provided, also has a structure in which feature：
I.e., at least a set of tapping equipment is also included；
Above-mentioned tapping equipment is arranged on concentrated water pond, for by the concentrated water discharge in concentrated water pond；
And/or
Above-mentioned tapping equipment is arranged on concentrated water sedimentation basin, for by through the concentrated water discharge after precipitation process.
Further, a kind of electroplating wastewater intermediate water reuse system that the present invention is provided, also has a structure in which feature：
I.e., above-mentioned concentrated water sedimentation basin is inclined-plate clarifying basin.
Effect of the invention and effect：
Can obviously reduce that counter-infiltration system is dirty stifled and work that the system rate of recovery can be significantly improved the invention provides a kind of
Skill and system.
In the present invention, single branch film design aquifer yield of counter-infiltration system is low, can so reduce system running pressure.
In the present invention, influent turbidity and SDI are reduced to minimum, warp by sand filtration twice or ultrafiltration for counter-infiltration system
Waste is seemed after sand filtration twice or ultrafiltration, because its treatment effect is basically identical, but in grey water system, only by a sand
Filter or ultrafiltration can not be steady in a long-term turbidity and SDI be reduced to film inflow requirement (turbidity ＜ 1NTU, SDI ＜ 5), and mistake twice
Turbidity and SDI can be reduced to film inflow requirement completely after filter；
In the present invention, the counter-infiltration system rate of recovery is low, can increase concentrated water flow velocity and reduce concentrated water cycles of concentration, system knot
Dirt is substantially reduced；
In the present invention, system is not provided with backflow, but is collected separately and processes, and concentrated water, can be by by after alkaline cleaning
Moieties after concentration precipitate, and only increase sodium ion and sulfate ion, and system TDS decreases, and is to enter film again
Play preferable Effect of Pretreatment；
In the present invention, by setting the independent tapping equipment of concentrated water, concentrated water is concentrated to a certain extent, can be disposable by concentrated water
Drain, endless loop will not be caused because of constantly concentration.
In the present invention, concentrated water treatment uses SDD, rather than using conventional PAC,
PAM, NaOH, H2SO4 etc..For electroplating wastewater, the medicament complex-precipitation ability is strong, and usage amount only needs several milligrams per liter, and
The removal effect of heavy metal is good, and the clearance of heavy metal reaches more than 90%, without adding flocculation aid, need not adjust back pH, no
Can because the addition of flocculation aid or sulfuric acid causes secondary pollution to system, and can partly after reduction treatment water electrical conductivity.
Brief description of the drawings
A kind of schematic diagram of electroplating wastewater intermediate water reuse system that accompanying drawing 1, embodiment is related to.
Specific embodiment
As shown in figure 1, a kind of electroplating wastewater intermediate water reuse system that the present embodiment is provided, including along the direction of current, according to
The cleaning wastewater collection pond of secondary setting, filtration system one, filtration system two, counter-infiltration system, concentrated water collecting pit, concentrated water precipitation
Pond；
The cleaning wastewater collection pond, for collecting pending reclaimed water；The filtration system one is sand filtration or ultrafiltration system, is used for
First time filtering is carried out to pending reclaimed water；
The filtration system two is sand filtration or ultrafiltration system, for carrying out second filtering to pending reclaimed water；
The counter-infiltration system, the waste water after being filtered to second is processed；Single branch film standardizes aquifer yield according to 0.3-
0.4T/h is designed, and the system rate of recovery is designed to 35%-40%；
Through the water that counter-infiltration system is processed, wherein, industrial water carries out Commercial cultivation, and another part water is changed into concentrated water entrance
Concentrated water collecting pit；
The concentrated water collecting pit, for collecting the concentrated water after being processed through counter-infiltration system, when concentrated water reaches set amount, by this
Concentrated water introduces concentrated water sedimentation basin；
The concentrated water sedimentation basin, for carrying out precipitation process to concentrated water, input has SDD in it,
The input amount of the SDD is every liter of concentrated water of 5mg/,；
Through the recycle-water after the treatment of above-mentioned sedimentation basin, cleaning wastewater collection pond is entered by reuse passage and enters next
The circulation of water process, until the concentration in concentrated water pond reaches setting value (such as：≤ 65% etc.), then the concentrated water is not suitable for being again introduced into
System, then discharged.
Additionally, according to it is actual produce and use the need for, can be divided into through the water after the treatment of above-mentioned sedimentation basin recycle-water and
Discharge water, the ratio can be 5:1、4:1、3:1、2：1 etc..
In the present embodiment, general operation is：After reclaimed water enters sand filtration or ultrafiltration system, by a sand filtration or super
Filter, reaches the purpose of secondary filter SDI, and counter-infiltration system standardizes aquifer yield according to 0.3- according to inflow according to single branch film
0.4T/h is designed, and the system rate of recovery is designed to 35%-40%, and concentrated water uses special concentrated water collecting pit, collecting pit big rootlet
May be designed as system operation 3-10 hours to design according to place limitation.Concentrated water handling process be designed as individually processing after row up to standard
Put or reuse.Concentrated water treatment method using after addition SDD by sloping plate deposition, then with reclaimed water one
Rise and return to sand filtration/ultrafiltration and arrive counter-infiltration system again.
Claims (9)
1. a kind of electroplating wastewater Treated sewage reusing technique, it is characterised in that：Pending waste water is laggard through sand filtration at least twice or ultrafiltration
Enter counter-infiltration system, the concentrated water after being processed through counter-infiltration system, through collecting with after precipitation process, is discharged and/or integrated with and wait to locate
Reprocessed in reason waste water；
Wherein, the reagent for the precipitation process is heavy metal chelating agent.
2. a kind of electroplating wastewater Treated sewage reusing technique as claimed in claim 1, it is characterised in that：
The waste water for entering counter-infiltration system after sand filtration at least twice or ultrafiltration, turbidity is less than 1NTU, and SDI is less than 5.
3. a kind of electroplating wastewater Treated sewage reusing technique as claimed in claim 1, it is characterised in that：
The recovery filter of the counter-infiltration system is 35-40%.
4. a kind of electroplating wastewater Treated sewage reusing technique as claimed in claim 1, it is characterised in that：
The heavy metal chelating agent is SDD.
5. a kind of electroplating wastewater Treated sewage reusing technique as claimed in claim 1, it is characterised in that：
The addition of the heavy metal chelating agent is 0.1-10 mg/litres.
6. a kind of electroplating wastewater Treated sewage reusing technique as claimed in claim 1, it is characterised in that：
It is described discharge be through precipitation process it is up to standard after directly discharge；
Or
The discharge is disposably drained when concentrated water concentration reaches setting value.
7. a kind of electroplating wastewater intermediate water reuse system, it is characterised in that：
Including the direction along current, the cleaning wastewater collection pond for setting gradually, filtration system one, filtration system two, counter-infiltration system
System, concentrated water collecting pit, concentrated water sedimentation basin；
The cleaning wastewater collection pond, for collecting pending reclaimed water；
The filtration system one is sand filtration or ultrafiltration system, for carrying out first time filtering to pending reclaimed water；
The filtration system two is sand filtration or ultrafiltration system, for carrying out second filtering to pending reclaimed water；
The counter-infiltration system, the waste water after being filtered to second is processed；
The concentrated water collecting pit, for collecting the concentrated water after being processed through counter-infiltration system；
The concentrated water sedimentation basin, is inside provided with heavy metal chelating agent, for carrying out precipitation process to concentrated water；
Recycle-water after the precipitation process, cleaning wastewater collection pond is entered by reuse passage.
8. a kind of electroplating wastewater intermediate water reuse system as claimed in claim 7, it is characterised in that：
Also include at least a set of tapping equipment；
The tapping equipment is arranged on concentrated water pond, for by the concentrated water discharge in concentrated water pond；
And/or
The tapping equipment is arranged on concentrated water sedimentation basin, for by through the concentrated water discharge after precipitation process.
9. a kind of electroplating wastewater intermediate water reuse system as claimed in claim 7, it is characterised in that：
The concentrated water sedimentation basin is inclined-plate clarifying basin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611236109.0A CN106698750A (en) | 2016-12-28 | 2016-12-28 | Electroplating wastewater reclaimed water recycling process and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611236109.0A CN106698750A (en) | 2016-12-28 | 2016-12-28 | Electroplating wastewater reclaimed water recycling process and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106698750A true CN106698750A (en) | 2017-05-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611236109.0A Pending CN106698750A (en) | 2016-12-28 | 2016-12-28 | Electroplating wastewater reclaimed water recycling process and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109467263A (en) * | 2018-10-29 | 2019-03-15 | 深圳骏泽环保有限公司 | The basic copper carbonate preparation process that board wastewater efficiently utilizes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657448A (en) * | 2004-12-04 | 2005-08-24 | 海宁市海整整流器有限公司 | Recovering and using technology of water in electroplating |
| CN103387293A (en) * | 2013-05-27 | 2013-11-13 | 三达膜科技（厦门）有限公司 | Reusing method for reclaimed water of leather wastewater |
| CN205575835U (en) * | 2016-01-29 | 2016-09-14 | 杭州萧索环保科技有限公司 | Electroplating wastewater treatment system |
-
2016
- 2016-12-28 CN CN201611236109.0A patent/CN106698750A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657448A (en) * | 2004-12-04 | 2005-08-24 | 海宁市海整整流器有限公司 | Recovering and using technology of water in electroplating |
| CN103387293A (en) * | 2013-05-27 | 2013-11-13 | 三达膜科技（厦门）有限公司 | Reusing method for reclaimed water of leather wastewater |
| CN205575835U (en) * | 2016-01-29 | 2016-09-14 | 杭州萧索环保科技有限公司 | Electroplating wastewater treatment system |
Non-Patent Citations (1)
| Title |
|---|
| 石泰山: "电镀废水再生和回用", 《电镀与环保》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109467263A (en) * | 2018-10-29 | 2019-03-15 | 深圳骏泽环保有限公司 | The basic copper carbonate preparation process that board wastewater efficiently utilizes |
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Application publication date: 20170524 |
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