CN103435174A - System and process for treating nickel-containing electroplating wastewater - Google Patents
System and process for treating nickel-containing electroplating wastewater Download PDFInfo
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- CN103435174A CN103435174A CN2013103975795A CN201310397579A CN103435174A CN 103435174 A CN103435174 A CN 103435174A CN 2013103975795 A CN2013103975795 A CN 2013103975795A CN 201310397579 A CN201310397579 A CN 201310397579A CN 103435174 A CN103435174 A CN 103435174A
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Abstract
The invention discloses a system for treating nickel-containing electroplating wastewater. The system comprises a wastewater collecting unit, a pretreating unit, an ultrafiltration unit, a concentration unit and a reverse osmosis unit, which are communicated with each other by pipelines in sequence, wherein the wastewater collecting unit comprises a wastewater collecting vat; the pretreating unit comprises a multi-media filter with filter precision not more than 50mu m; the ultrafiltration unit comprises a group of ultrafiltration membranes; the concentrated water produced by the ultrafiltration unit is connected to the wastewater collecting unit; the produced water of the ultrafiltration unit is connected to the concentration unit; the concentration unit comprises at least a group of concentration membranes; the concentrated water produced by the concentration unit is connected to a concentrated nickel collecting vat; the producing water of the concentration unit is connected to the reverse osmosis unit; the reverse osmosis unit comprises at least a group of reverse osmosis membranes and a membrane washing device; the produced water of the reverse osmosis unit is connected to a recycle water collecting vat. After the nickel-containing electroplating wastewater undergoes filtration treatment, ultrafiltration treatment, concentration treatment and reverse osmosis treatment in sequence, nickel in the wastewater can be recycled and the produced water can be recycled.
Description
Technical field
The present invention relates to a kind for the treatment of system and technique of waste water, be specifically related to a kind for the treatment of system and technique of Ni-containing Plating Wastewater.
Background technology
Nickel, as a kind of corrosion resistant metal, is widely used in electroplating industry.Yet the Ni-containing Plating Wastewater produced in electroplating process, if not treated direct discharge can cause serious environmental pollution.At present, often with chemical method, process Ni-containing Plating Wastewater, to consume the mode that another kind of available resources are cost to carry out the nickel in degrading waste water, its process is the pure chemistry process, generate another kind of or several complex materials with two kinds of inhomogeneous substance reactions, become electroplating wastewater mud through coagulating sedimentation, whole treating processes is just degraded to the pollutent in water body, make water body obtain corresponding purification, but fundamentally do not reduce the total emission volumn of pollutent, increased on the contrary to the total amount of environmental emission pollutent.Adopt traditional Chemical Method for Waste Water of Electroplate, although the advantage such as it is wide to have a reagent source, easy to operate can not very reach emission standard after processing, and produce water can not reuse, caused again to a certain extent the waste of resource.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, but a kind of waste water treatment efficiency is high, produce the Ni-containing Plating Wastewater of water reuse treatment system and technique are provided.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind for the treatment of system of Ni-containing Plating Wastewater, comprise the wastewater collection unit be communicated with successively by pipeline, pretreatment unit, ultra filtration unit, upgrading unit and reverse osmosis units, wherein, described wastewater collection unit comprises the wastewater collection bucket, described pretreatment unit comprises a more medium filter, its filtering accuracy is≤50 μ m, described ultra filtration unit comprises one group of ultra-filtration membrane, the dense water that ultra filtration unit produces is connected to the wastewater collection unit, the product water of ultra filtration unit is connected to upgrading unit, described upgrading unit comprises at least one group of concentrated film, the dense water that described upgrading unit produces is connected to concentrated nickel gathering barrel, it produces water and is connected to reverse osmosis units, described reverse osmosis units comprises at least one group of reverse osmosis membrane and film washing unit, the generation of reverse osmosis units is connected to the reuse water gathering barrel.
Preferably: the filtration medium in more medium filter is quartz sand and/or gac.
Preferably: also be provided with an accurate filter in described pretreatment unit.
Preferably: the filtering accuracy of described accurate filter is≤0.5 μ m.
Preferably: be provided with two groups of concentrated films in described upgrading unit.
Preferably: be provided with two groups of reverse osmosis membranes in described reverse osmosis units.
Preferably: described treatment system also comprises between each processing unit pipeline and the lift pump for delivery of waste water.
Preferably: described treatment system also comprises under meter and the control valve of being located between each processing unit.
A kind for the treatment of process of Ni-containing Plating Wastewater comprises following treatment step:
1) waste water is removed the suspended particle that the finely ground particle substance such as colloid in waste water and particle diameter are greater than 0.5 μ m through filtration treatment;
2) waste water after processing after filtration in step 1) is carried out to uf processing, remove the particle that granularity is greater than 0.022 μ m;
3) utilize concentrated film to carry out concentration to waste water, reclaim after the nickel in waste water is concentrated;
4) the product water after concentration in step 3) is carried out to reverse-osmosis treated, after further univalent ion is removed in separation, produce water and reclaim.
Beneficial effect of the present invention is, treatment system of the present invention adopts multiple film processing unit and technique to be processed Ni-containing Plating Wastewater, without extra interpolation chemical processing agent, treatment effect is good, operational efficiency is high, and can not produce secondary pollution, has high economic benefit and environmental benefit.
The accompanying drawing explanation
Fig. 1 shows the frame principle figure for the treatment of system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1: Ni-containing Plating Wastewater treatment system of the present invention, comprise the wastewater collection unit be communicated with successively by pipeline, pretreatment unit, ultra filtration unit, upgrading unit and reverse osmosis units, wherein, described wastewater collection unit comprises the wastewater collection bucket, described pretreatment unit comprises a more medium filter, filtration medium in described more medium filter is quartz sand and/or gac, its filtering accuracy is≤50 μ m, further, for guaranteeing the influent quality requirement of follow-up unit, also an accurate filter can be set in described pretreatment unit, the filtering accuracy of described accurate filter is≤0.5 μ m, waste water after pretreatment unit is processed promotes and enters ultra filtration unit through pump, described ultra filtration unit comprises one group of ultra-filtration membrane, and its aperture is 0.1～5 μ m, and the dense water that ultrafiltration produces promotes and is back to the wastewater collection unit through pump, and it produces water and promotes and enter into upgrading unit through pump, described upgrading unit comprises at least one group of concentrated film, as one preferred embodiment, in the present embodiment, be provided with altogether two groups of concentrated films, its concentration rate is 8～10 times, the concentrated dense water produced is connected to concentrated nickel gathering barrel, it produces water and promotes and enter into reverse osmosis units through pump, described reverse osmosis units comprises at least one group of reverse osmosis membrane and film washing unit, as one preferred embodiment, in the present embodiment, be provided with altogether two groups of reverse osmosis membranes, the product water of reverse osmosis units enters into the reuse water gathering barrel through the pump lifting and treats reuse.In addition, Ni-containing Plating Wastewater treatment system of the present invention, also comprise that a pair of whole treatment system carries out the whole PLC electrical control system of controlling, and pipeline and lift pump for managing throughout transport wastewater between unit, further, treatment system of the present invention also comprises under meter and the control valve of being located between each processing unit.
Adopt the Ni-containing Plating Wastewater that said system is 100ppm to 1000ppmm to nickel content to be processed, its treatment process comprises the following steps:
1) Wastewater Pretreatment: the Ni-containing Plating Wastewater that the wastewater collection unit is collected promotes and enters pretreatment unit through pump, after filtering successively the finely ground particle substance such as the colloid removed in waste water and particle diameter through more medium filter and accurate filter and being greater than the suspended particle of 0.5 μ m, it produces water and promotes through pump and enter into ultra filtration unit;
2) uf processing: adopt ultra-filtration membrane to carry out uf processing to pretreated waste water in step 1), remove the fine particle that granularity is greater than 0.022 μ m;
3) Waste water concentrating is processed: utilize concentrated film to the high rejection of polyvalent ion with to the characteristic of the low rejection of monovalent ion, and the nickel in waste water is concentrated at double, make it meet the requirement of coating bath to nickel concentration (>10g/L) in reuse waste water;
4) reverse-osmosis treated: the product water after concentrated film is processed, through reverse osmosis membrane processing, further separates and removes univalent ion, makes its water outlet meet the requirement of rinse water and film system rinse water water quality.
Adopt above-mentioned treatment system to be processed the electroplating acid copper waste water of certain factory, the water quality situation before and after processing, as shown in table 1:
Table 1 Ni-containing Plating Wastewater treatment system is processed front and back water quality situation
| Project | Water inlet | Produce water |
| Turbidity | 5～10NTU | ≤2NTU |
| Suspended solid/(mg/L) | 2～5 | ＜0.1 |
| Colourity | 10～25 | ≤1 |
| Total dissolved solid/(mg/L) | 10～50 | Do not detect |
| Specific conductivity/(μ s/cm) | 1300～2000 | ≤200 |
| The naked eyes visible | Trace | Nothing |
| Smell | Dense foreign odor flavor | Be as good as stink |
Be only preferred embodiment of the present invention in sum, not be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, all should belong to technology category of the present invention.
Claims (9)
1. the treatment system of a Ni-containing Plating Wastewater, it is characterized in that: comprise the wastewater collection unit be communicated with successively by pipeline, pretreatment unit, ultra filtration unit, upgrading unit and reverse osmosis units, wherein, described wastewater collection unit comprises the wastewater collection bucket, described pretreatment unit comprises a more medium filter, its filtering accuracy is≤50 μ m, described ultra filtration unit comprises one group of ultra-filtration membrane, the dense water that ultra filtration unit produces is connected to the wastewater collection unit, the product water of ultra filtration unit is connected to upgrading unit, described upgrading unit comprises at least one group of concentrated film, the dense water that described upgrading unit produces is connected to concentrated nickel gathering barrel, it produces water and is connected to reverse osmosis units, described reverse osmosis units comprises at least one group of reverse osmosis membrane and film washing unit, the generation of reverse osmosis units is connected to the reuse water gathering barrel.
2. treatment system according to claim 1, it is characterized in that: the filtration medium in more medium filter is quartz sand and/or gac.
3. treatment system according to claim 1, is characterized in that: also be provided with an accurate filter in described pretreatment unit.
4. treatment system according to claim 3, it is characterized in that: the filtering accuracy of described accurate filter is≤0.5 μ m.
5. treatment system according to claim 1, is characterized in that: be provided with two groups of concentrated films in described upgrading unit.
6. treatment system according to claim 1, is characterized in that: be provided with two groups of reverse osmosis membranes in described reverse osmosis units.
7. according to the described treatment system of claim 1～6 any one, it is characterized in that: described treatment system also comprises between each processing unit pipeline and the lift pump for delivery of waste water.
8. according to the described treatment system of claim 1～6 any one, it is characterized in that: described treatment system also comprises under meter and the control valve of being located between each processing unit.
9. the treatment process of a Ni-containing Plating Wastewater is characterized in that: comprise following treatment step:
1) waste water is removed the suspended particle that the finely ground particle substance such as colloid in waste water and particle diameter are greater than 0.5 μ m through filtration treatment;
2) waste water after processing after filtration in step 1) is carried out to uf processing, remove the particle that granularity is greater than 0.022 μ m;
3) utilize concentrated film to carry out concentration to waste water, reclaim after the nickel in waste water is concentrated;
4) the product water after concentration in step 3) is carried out to reverse-osmosis treated, after further univalent ion is removed in separation, produce water and reclaim.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109293034A (en) * | 2018-11-29 | 2019-02-01 | 珠海杰赛科技有限公司 | A kind of processing system and processing method of nickel-containing waste water |
| CN113603283A (en) * | 2021-08-16 | 2021-11-05 | 温州科锐环境资源利用有限公司 | Nickel-containing wastewater resource utilization process |
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| CN113603283A (en) * | 2021-08-16 | 2021-11-05 | 温州科锐环境资源利用有限公司 | Nickel-containing wastewater resource utilization process |
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Application publication date: 20131211 |