CN107954581A - A kind of electroplating wastewater advanced treatment system and its technique - Google Patents
A kind of electroplating wastewater advanced treatment system and its technique Download PDFInfo
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- CN107954581A CN107954581A CN201711446244.2A CN201711446244A CN107954581A CN 107954581 A CN107954581 A CN 107954581A CN 201711446244 A CN201711446244 A CN 201711446244A CN 107954581 A CN107954581 A CN 107954581A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000009713 electroplating Methods 0.000 title claims abstract description 26
- 238000004062 sedimentation Methods 0.000 claims abstract description 68
- 230000001105 regulatory effect Effects 0.000 claims abstract description 65
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 59
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 230000003647 oxidation Effects 0.000 claims abstract description 34
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 34
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 28
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 8
- 239000010802 sludge Substances 0.000 claims description 36
- 238000000926 separation method Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 17
- 238000010907 mechanical stirring Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 11
- 229910001385 heavy metal Inorganic materials 0.000 claims description 10
- 239000007800 oxidant agent Substances 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 230000035484 reaction time Effects 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000006228 supernatant Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 4
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 4
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 10
- 238000005086 pumping Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 4
- 239000005708 Sodium hypochlorite Substances 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 206010000372 Accident at work Diseases 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910019093 NaOCl Inorganic materials 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical class S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- 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
Landscapes
- 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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention discloses a kind of electroplating wastewater advanced treatment system and its technique, and wherein system includes：First pretreatment unit, the pretreatment for cyanide wastewater；Second pretreatment unit, the pretreatment for chromate waste water；3rd pretreatment unit, the pretreatment for nickel-containing waste water；The liquid outlet of first, second, third pretreatment unit is respectively connected to the comprehensive regulating reservoir that catchments；The synthesis regulating reservoir that catchments is sequentially connected integrated water fenton oxidation ponds, the 3rd sedimentation basin, two level broken cyanide pond, the 4th sedimentation basin, biochemical subsystem, deep oxidation subsystem and the 5th sedimentation basin in order.The present invention is easy to operate, and technique link is simple, can effectively save every cost, and preferably convenient and service is provided for enterprise.
Description
Technical field
The present invention relates to electroplating wastewater processing field, and in particular to a kind of electroplating wastewater advanced treatment system and its technique.
Background technology
With the high speed development of China's economy and science and technology, China has become the manufacturing center of gravity in the world, while manufacturing industry
Development bring substantial amounts of pollution.Electroplating wastewater is big with its toxicity in various pollution sources, and discharge capacity is big, and refractory reason is especially worth
It must pay close attention to.According to incompletely statistics, the Electroplate Factory of the various scales in the whole nation has nearly 20,000, and annual electroplating wastewater discharge capacity accounts for chief engineer
The 10% of industry wastewater discharge.
Electroplating cleaning waste water treatment process is mainly at this stage：Major pollutants are the weight such as copper, nickel in heavy metal-containing waste water
Metal ion complex, cannot generally remove by adding the method for acid-base neutralization, and the processing to the waste water containing heavy metal complex should
Contact break technique is first carried out, or itself and heavy metal ion shape are made than the precipitating reagent of Complex Stability Constants smaller using solubility product
Into more stable sediment, separated from waste water, achieve the purpose that removal.
Major pollutants are cyanide in cyanide wastewater, generally separate this strand of waste water and individually carry out at cyanogen breaking process
Reason, prevents it from forming cyaniding complex state pollutant after being mixed with heavy metal wastewater thereby, increases the intractability of waste water.Cyanide wastewater
Processing method have it is a variety of, at present both at home and abroad still based on alkaline chlorination process, alkaline chlorination process is in alkaline conditions, using secondary chlorine
The method that the chlorine system oxidants such as sour sodium (NaOCl), bleaching powder, liquid chlorine destroy cyanide, its cardinal principle are exactly to utilize time chlorine
The oxidation of acid group, first becomes cyanate by cyanide oxidation, then cyanate is oxidized to the process of N2 and CO2.
In chromate waste water, chromium mainly exists in the form of Cr6+, in acid condition, adds reducing agent and is reduced into Cr6+
Cr3+, then adjusts PH to alkalescence, and generation chromium hydroxide precipitation removes, common reducing agent have sodium sulfite, sodium hydrogensulfite,
Ferrous sulfate etc..
But cyanide wastewater needs two-stage cyanogen breaking process in existing process processing electroplating wastewater, between two-stage cyanogen breaking process
Need to adjust waste water pH value, at the same it is lasting add oxidant (sodium hypochlorite), be also easy to produce giving up containing cyanogen for severe toxicity in this process
Gas, is easy to cause industrial accident；Moreover, the anti impulsion load ability of existing process processing electroplating wastewater is small, can not stablize
Water outlet indices stably reach emission request in the case of guarantee variation water quality is larger, while if run into the countries such as raising standard
Or local policy, the system can not meet related needs.
In view of drawbacks described above, creator of the present invention obtains the present invention finally by prolonged research and practice.
The content of the invention
To solve above-mentioned technological deficiency, the technical solution adopted by the present invention is, there is provided a kind of electroplating wastewater advanced treating
System, including：First pretreatment unit, the pretreatment for cyanide wastewater；Second pretreatment unit, for the pre- of chromate waste water
Processing；3rd pretreatment unit, the pretreatment for nickel-containing waste water；The liquid outlet of first, second, third pretreatment unit
It is respectively connected to the comprehensive regulating reservoir that catchments；The synthesis catchment regulating reservoir be sequentially connected in order integrated water fenton oxidation ponds,
3rd sedimentation basin, two level broken cyanide pond, the 4th sedimentation basin, biochemical subsystem, deep oxidation subsystem and the 5th sedimentation basin.
Preferably, first pretreatment unit includes：Cyanide wastewater regulating reservoir, the cyanide wastewater regulating reservoir are connected with
One first vacuum pump and the second vacuum pump, first vacuum pump and the second vacuum-pump line converge concentration and are connected to the first broken cyanide
Pond, the first broken cyanide pond are sequentially connected the second broken cyanide pond and overcurrent pond, and the final pipeline in overcurrent pond is connected to the synthesis
Catchment regulating reservoir；
Second pretreatment unit includes：Chromate waste water regulating reservoir, it is true that the chromate waste water regulating reservoir is connected with the 3rd
Sky pump and the 4th vacuum pump, the 3rd vacuum pump and the 4th vacuum-pump line converge concentration and are connected to Cr6+Pond is reduced, it is described
Cr6+Reduction pond is sequentially connected first, and mixed pond, first mix pond and first sedimentation basin slowly soon；The final pipeline of first sedimentation basin
The synthesis is connected to catchment regulating reservoir；
3rd pretreatment unit includes：Nickel-containing waste water PH regulating reservoirs, the nickel-containing waste water PH regulating reservoirs are sequentially connected
Second mixes pond, second soon, and mixed pond, second sedimentation basin, nickel-containing waste water intermediate pool, the nickel-containing waste water intermediate pool are connected with slowly
5th vacuum pump and the 6th vacuum pump, the 5th vacuum pump and the 6th vacuum-pump line converge concentration and are connected to the comprehensive collection
Water regulating reservoir.
Preferably, the integrated water fenton oxidation ponds include：First reduction pond, the first reduction pond are sequentially connected the
Three mix pond, the 3rd mixed pond and the 3rd sedimentation basin slowly soon；3rd sedimentation basin is connected to the two level by pipeline and breaks
Cyanogen pond.
Preferably, the two level broken cyanide pond includes：First regulating reservoir, first regulating reservoir are sequentially connected heavy metal reaction
Pond, the 4th mix pond and the 4th sedimentation basin slowly；4th sedimentation basin is also associated with a readjustment pond, and the readjustment pond passes through
Pipeline is connected to the biochemical subsystem.
Preferably, the biochemistry subsystem includes：Anaerobic pond, it is good that the anaerobic pond is sequentially connected level-one aerobic tank, two level
Oxygen pond, the 2nd PH regulating reservoirs, the 2nd PH regulating reservoirs are connected to the deep oxidation pond eventually through pipeline.
A kind of electroplating wastewater advanced treatment process, the first step, cyanide wastewater is pre-processed, and obtains the first mixed liquor；
Chromate waste water is sent into row pretreatment, obtains the second mixed liquor；Nickel-containing waste water is pre-processed, and obtains the 3rd mixed liquor；
Second step, after above-mentioned three kinds of mixed liquors are mixed, is sent into fenton oxidation ponds and is handled, add 100ppm's
H2O2, reaction time 60-90min；The stir speed (S.S.) of mechanical stirring equipment is 60r/min；Finally obtain the 4th mixing
Liquid；4th mixed liquor carries out mud-water separation, obtains the clear liquid and lower floor's sludge on upper strata after separation, lower floor's sludge send to
Sludge treating system；
3rd step, the clear liquid that supernatant liquor described above obtained after denitrogenation dephosphorizing is sent to advanced treating, through depth
The 5th mixed liquor is obtained after degree processing, after mud-water separation, obtained sludge is sent to sewage disposal system the 5th mixed liquor
System, obtained supernatant carry out qualified discharge.
Preferably, the above-mentioned first step, cyanide wastewater is sent to the first pretreatment unit, first pretreatment unit and is added
27.5%H2O2, and it is 200-300mv to control ORP value, and after the coreaction residence time is 40min, the stirring speed of mechanical stirring equipment
Rate is 60r/min, finally, obtains the first mixed liquor.
Preferably, sending chromate waste water to the second pretreatment unit, reducing agent is added in second pretreatment unit
Sodium pyrosulfite, and it is 200-300mv to control ORP value, the coreaction residence time is 15min, and the stirring of mechanical stirring equipment is fast
Rate is 60r/min, obtains the second mixed liquor；Second mixed liquor is adjusted into PH to 9.0 or so through compound alkali and carries out muddy water point
From residence time 1h.
Preferably, sending nickel-containing waste water to the 3rd pretreatment unit, adjusted in the 3rd pretreatment unit through compound alkali
PH is controlled in 8.0-8.5 or so, obtains the 3rd mixed liquor；Above-mentioned 3rd mixed liquor carries out mud-water separation, residence time 1h.
Preferably, the deep oxidation processing is sub- in seven hydrated sulfuric acids for adding 300ppm after PH is adjusted to 9.0-9.5
Iron and oxidant, oxidant dosage is by controlling ORP value to be adjusted for 200-300mv, reaction time
For 30min, and the stir speed (S.S.) of mechanical stirring equipment is 45r/min, obtains the 5th mixed liquor.
Compared with the prior art the beneficial effects of the present invention are：1, the present invention improves while can reducing processing cost
The stability for the treatment of effect；2, the present invention can effectively reduce industrial accident, improve personal safety to worker and
The protection of the property of enterprise；3, the present invention can ensure that indices can stably reach national high standard emission request；4,
It is of the invention effective to improve electroplating waste water treatment system anti impulsion load ability, it can be good at adapting to relevant putting forward mark transformation work
Journey.5, the present invention is easy to operate, and technique link is simple, can effectively save every cost, is provided preferably just for enterprise
Profit and service.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical solution in various embodiments of the present invention
The attached drawing used is briefly described.
Fig. 1 is the process flow chart of the present invention；
Fig. 2 is the structure chart of present system；
Fig. 3 is the raw water quality table in the embodiment of the present invention 1；
Fig. 4 is water quality testing data before and after Sewage advanced treatment after the embodiment of the present invention 1 integrates；
Digital representation in figure：
1. 4. first sedimentation basin 5. of the 3rd pretreatment unit of 2. second pretreatment unit 3. of the first pretreatment unit
Two sedimentation basins, 6. integrated water is catchmented 7. the 3rd sedimentation basin of integrated water fenton oxidation ponds 8. of regulating reservoir, 9. two level broken cyanide pond
10. 12. the 5th sedimentation basin of deep oxidation pond 13. of the biochemical subsystem of the 4th sedimentation basin 11., 14. source of the gas 1-1. cyanide wastewater tune
Save pond 1-11. the first vacuum pump 1-12. the second vacuum pump 1-13. first liquid level gauges the first broken cyanides of 1-2. pond 1-3. second
The 4th vacuum pump 2-13. of broken cyanide pond 1-4. overcurrents pond the 3rd vacuum pump 2-12. of 2-1. chromate waste water regulating reservoirs 2-11.
Two liquid level gauge 2-2.Cr6+ reduction pond 2-3. first mixes pond 2-4. first and mixes pond 3-1. nickel-containing waste water PH regulating reservoirs 3- slowly soon
2. second mixes pond 3-3. second soon mixes the 6th vacuum of pond the 5th vacuum pump 3-52. of 3-4. nickel-containing waste water intermediate pool 3-51. slowly
The 4th liquid level gauge 7-1. first of the 7th the 8th vacuum pump 6-3. of vacuum pump 6-2. of pump 3-53. third liquid level gauges 6-1. are reduced
Mixed pond 9-1. the first regulating reservoir 9-2. heavy metal reaction tanks 9-3. the 4th is mixed slowly slowly by mixed pond 7-3. the 3rd soon by pond 7-2. the 3rd
Pond 10-1.PH adjusts back the 2nd PH regulating reservoirs of pond 11-1. anaerobic pond 11-2. level-one aerobic tank 11-3. two level aerobic tanks 11-4.
The 3rd PH regulating reservoirs of 12-1.
Embodiment
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
Embodiment 1
As shown in Figure 1, a kind of electroplating wastewater advanced treatment system, including：First pretreatment unit 1, for cyanide wastewater
Pretreatment；Second pretreatment unit 2, the pretreatment for chromate waste water；3rd pretreatment unit 3, for nickel-containing waste water
Pretreatment；The outlet of second pretreatment unit 3 and the 3rd pretreatment unit 3 is connected to the first sedimentation basin 4 and the second precipitation
Pond 5；The liquid outlet of first pretreatment unit 1 and the first sedimentation basin 4 and the second sedimentation basin 5 are respectively connected to comprehensive collection by pipeline
Water regulating reservoir 6；The comprehensive outlet of regulating reservoir 6 of catchmenting connects integrated water fenton oxidation ponds 7 (Fenton oxidation pond) by pipeline, comprehensive
Water fenton oxidation ponds 7 are used to reduce the organic matter in electroplating wastewater；Integrated water fenton oxidation ponds 7 are connected with one by pipeline
3rd sedimentation basin 8, the 3rd sedimentation basin 8 are connected by pipeline with two level broken cyanide pond 9, and two level broken cyanide pond 9, which is used to remove in waste water, to be remained
Remaining cyanide；What two level broken cyanide sedimentation basin 9 was connected by pipeline is the 4th sedimentation basin 10, and the 4th sedimentation basin 10 is connected by pipeline
Deliver a child sub-systems 11, biochemical subsystem 11 is used to remove the organic matter that can be biodegradable in waste water；Biochemical subsystem 11
Water outlet is connected by pipeline is deep oxidation subsystem 12, deep oxidation subsystem 12 is used to removing residue in waste water cannot
The organic matter being biodegradable, while the 5th sedimentation basin 13 being connected with deep oxidation subsystem 12, it is remaining in water removal for going
Ionic state heavy metal.
Embodiment 2
Difference lies in the first pretreatment unit 1 includes for the present embodiment and above-described embodiment：Cyanide wastewater regulating reservoir 1-
1, cyanide wastewater regulating reservoir 1-1 are connected with the first vacuum pump 1-11 and the second vacuum pump 1-12, the first vacuum pump 1- by pipeline
11 and second vacuum pump 1-12 by converging localized ducting be sequentially connected the first broken cyanide pond 1-2, the second broken cyanide pond 1-3, overcurrent pond
1-4, overcurrent pond 1-4 eventually pass through the comprehensive regulating reservoir 6 that catchments of pipeline connection.
Second pretreatment unit 2 includes：Chromate waste water regulating reservoir 2-1, chromate waste water regulating reservoir 2-1 are connected by pipeline
There is the 3rd vacuum pump 2-11 and the 4th vacuum pump 2-12, the 3rd vacuum pump 2-11 and the 4th vacuum pump 2-12 are by converging concentrate tube
Road is sequentially connected Cr6+Pond 2-2 is reduced, first mixes pond 2-3 soon, and first mixes pond 2-4 slowly, and the first sedimentation basin 4, the first sedimentation basin 4 is most
Eventually through the comprehensive regulating reservoir 6 that catchments of piping connection.
3rd pretreatment unit 3 includes：Nickel-containing waste water PH regulating reservoir 3-1, nickel-containing waste water PH regulating reservoirs 3-1 pass through pipeline
Connection second mixed pond 3-2 soon, second soon mixed pond 3-2 be linked in sequence the second mixed pond 3-3 slowly, second slowly mixed pond 3-3 is connected by pipeline
The second sedimentation basin 5 is connect, the second sedimentation basin 5 connects nickel-containing waste water intermediate pool 3-4 by pipeline, and nickel-containing waste water intermediate pool 3-4 is also logical
Piping is connected with the 5th vacuum pump 3-51 and the 6th vacuum pump 3-52, and five vacuum pump 3-51 and the 6th vacuum pump 3-52 pass through remittance
Close the comprehensive regulating reservoir 6 that catchments of localized ducting connection.
The comprehensive regulating reservoir 6 that catchments is also associated with the 7th vacuum pump 6-1 and the 8th vacuum pump 6-2, the 7th vacuum by pipeline
Pump 6-1 and the 8th vacuum pump 6-2 is connected to integrated water fenton oxidation ponds 7 by converging localized ducting.
Integrated water fenton oxidation ponds 7 are also connected with the first reduction pond 7-1 in turn by pipeline, and the 3rd mixes pond 7-2 soon, the
Three mix pond 7-3 and the 3rd sedimentation basin 8 slowly.
Two level broken cyanide pond 9 is also connected with the first regulating reservoir 9-1 in turn by pipeline, and heavy metal reaction tank 9-2, the 4th is slow mixed
Pond 9-3, is connected to the 4th sedimentation basin 10, the 4th sedimentation basin 10 is also associated with a readjustment pond 10- by pipeline eventually through pipeline
1；Readjustment pond 10-1 is connected to biochemical subsystem 11 by pipeline.
Biochemical subsystem 11 includes：Anaerobic pond 11-1, level-one aerobic tank 11-2, two level aerobic tank 11-3, the 2nd PH tune
Save pond 11-4；It is sequentially connected from anaerobic pond 11-1 by pipeline.2nd PH regulating reservoirs 11-4 connects deep oxidation by pipeline
System 12.
Embodiment 3
The present embodiment and above-described embodiment difference lies in, in cyanide wastewater regulating reservoir 1-1, chromate waste water regulating reservoir 2-1,
Nickel-containing waste water intermediate pool 3-4, is respectively equipped with first liquid level gauge 1-13 in the comprehensive regulating reservoir 6 that catchments, second liquid level gauge 2-13, and the 3rd
Liquid level gauge 3-53, the 4th liquid level gauge 6-3, are respectively used to detect the liquid level in each pond, can ensure the liquid monitored at any time in each pond
Position, keeps the steady of liquid level, prevents the liquid in each pond from overflowing, so as to reach the security of workshop.
Embodiment 4
Difference lies in integrated water fenton oxidation ponds 7 reduce pond 7-1, and level-one is aerobic for the present embodiment and above-described embodiment
The pipeline for connecting source of the gas is equipped with inside pond 11-2, two level aerobic tank 11-3 and deep oxidation pond 12, is carried out for receiving source of the gas
Oxidation, ensures the normal transmission of source of the gas, so that it is thorough in time to reach reaction.
Embodiment 5
Difference lies in the first broken cyanide pond 1-2, the second broken cyanide pond 1-3, Cr6+ reduce pond for the present embodiment and above-described embodiment
2-2, first mixes pond 2-3, the first slow mixed pond 2-4 soon, and nickel-containing waste water PH regulating reservoirs 3-1, the second fast mixed pond 3-2, second is slow to mix pond
3-3, the 3rd mixes pond 7-2 soon, and the 3rd mixes pond 7-3, the first regulating reservoir 9-1, heavy metal reaction tank 9-2, the 4th slow mixed pond 9-3 slowly,
Mechanical stirring equipment is both provided with readjustment pond 10-1, the 2nd PH regulating reservoirs 11-4 and the 3rd PH regulating reservoirs 12-1, for uniform
Stirring；By setting its mixing speed, so as to reach mixed uniformly effect.
Embodiment 6
The present embodiment and above-described embodiment difference lies in, the bottom of each sedimentation basin is also associated with a sludge treating system,
Sludge treating system can be existing system, therefore the present invention does not explain.
Embodiment 7
A kind of electroplating wastewater advanced treatment process method, the first step, the cyanide wastewater in cyanide wastewater regulating reservoir 1-1 is led to
The first vacuum pump and the second vacuum pumping are crossed to the first broken cyanide pond 1-2, is divided in the first broken cyanide pond 1-2 and the second broken cyanide pond 1-3
H is not added2O2(technical grade, 27.5%), and it is 200-300mv to control ORP value, after the coreaction residence time is 40min, first
Broken cyanide pond 1-2, the stir speed (S.S.) of the second broken cyanide pond 1-3 mechanical stirring equipments is 60r/min, is obtained eventually through overcurrent pond 1-4
First mixed liquor；
By the chromate waste water in chromate waste water regulating reservoir 2-1 by the 3rd vacuum pump and the 4th vacuum pumping to Cr6+ also
Former pond 2-2, reducing agent sodium pyrosulfite is added in Cr6+ reduces pond 2-2, and is passed sequentially through first and mixed pond 2-3 soon, and first is slow
Mixed pond 2-4；R6+ reduces pond 2-2, the first mixed pond 2-3 soon, the first mixed pond 2-4 slowly, and it is 200-300mv to control ORP value, coreaction
Residence time is 15min, and Cr6+ reduction pond 2-2, first mixes pond 2-3, the stirring speed of the first slow mixed pond 2-4 mechanical stirring equipments soon
Rate is 60r/min, obtains the second mixed liquor；
Second mixed liquor is pumped to the first sedimentation basin 4, adjusting PH to 9.0 or so through compound alkali carries out mud-water separation, the
Residence time of two mixed liquors in the first sedimentation basin 4 is 1h；Second mixed liquor obtains after 4 mud-water separation of the first sedimentation basin
The clear liquid and lower floor's sludge on upper strata, wherein lower floor's sludge pumping to sludge treating system.
Nickel-containing waste water is sent to the 3rd pretreatment unit 3, is adjusted and is passed sequentially through through compound alkali in nickel-containing waste water PH regulating reservoirs 3-1
Second mixes pond 3-2 soon, and second mixes pond 3-3 slowly, is controlled through PH in 8.0-8.5 or so, obtains the 3rd mixed liquor, above-mentioned 3rd mixing
Liquid is pumped to the second sedimentation basin 5, carries out mud-water separation, residence time of the 3rd mixed liquor in the second sedimentation basin 5 is 1h；3rd
Mixed liquor obtains supernatant liquor and lower floor's sludge, wherein lower floor's sludge pumping to sludge after 5 mud-water separation of the second sedimentation basin
Processing system.
Second step, through the first pretreatment unit 1, the second pretreatment unit 2, the 3rd pretreatment unit 3 pretreated three
Kind mixed liquor converges to comprehensive wastewater regulating reservoir 6, is sent after the mixing of comprehensive wastewater regulating reservoir 6 to fenton oxidation ponds 7；In reduction pond
The H of 100ppm is added in 7-12O2(technical grade, 27.5%), and pass sequentially through the 3rd and mix pond 7-2 soon, the 3rd mixes pond 7-3 slowly, instead
Should it be 60-90min the residence times, and the stir speed (S.S.) of mechanical stirring equipment is 60r/min, obtains the 4th mixed liquor.By the 4th
Mixed liquor is sent to the 3rd sedimentation basin 8, carries out mud-water separation, residence time of the 4th mixed liquor in the 3rd sedimentation basin 8 is 1-5h；
4th mixed liquor obtains the clear liquid and lower floor's sludge on upper strata, wherein lower floor's sludge pumping after 8 mud-water separation of the 3rd sedimentation basin
To sludge treating system.
3rd step, the supernatant liquor after the separation of the 3rd sedimentation basin 8 is through two level broken cyanide pond 9, the first regulating reservoir 9-1, a huge sum of money
Belong to reaction tank 9-2, the 4th slow mixed pond 9-3 and obtained to the 4th sedimentation basin 10 and after biochemical 11 denitrogenation dephosphorizing of subsystem clear
Liquid；
4th step, biochemical 11 water outlet of subsystem is sent to deep oxidation pond 12, in the 3rd PH tune after PH is adjusted to 9.0-9.5
Green vitriol and oxidant (sodium hypochlorite) that pond 12-1 adds 300ppm are saved, oxidant dosage is controlled by controlling
ORP value processed is adjusted for 200-300mv, reaction time 30min, and the stir speed (S.S.) of mechanical stirring equipment is
45r/min, obtains the 5th mixed liquor, and the 5th mixed liquor obtains supernatant liquor and lower floor after 13 mud-water separation of the 5th sedimentation basin
Sludge, wherein lower floor's sludge pumping to sludge treating system.The clear liquid that 5th sedimentation basin, 13 mud-water separation obtains can row up to standard
Put.
Embodiment 8
As shown in figure 3, the waste water of Shenzhen Bao'an Treatment of Industrial Park of Plating is taken to be pumped to first as subjects, cyanide wastewater
Pretreatment unit 1, the COD of the waste water are 600mg/L, PH between 7-8, Ni2+For 20mg/L, CN-For 500mg/L, H is added2O2
(technical grade, 27.5%), it is 200-300mv to control ORP value, reaction time 40min, the stirring speed of mechanical stirring equipment
Rate is 60r/min, obtains the first mixed liquor, and the first mixed liquor COD is 320mg/L, CN-For the clear liquid of 20-30mg/L；
Chromate waste water is pumped to the second pretreatment unit 2, the COD of the waste water be 260mg/L, PH between 1 and 2, be 40-
50mg/L, adds reducing agent sodium pyrosulfite, and it is 200-300mv to control ORP value, reaction time 15min, mechanical agitation
The stir speed (S.S.) of equipment is 60r/min, obtains the second mixed liquor.Second mixed liquor is pumped to the first sedimentation basin 4, through compound
Alkali adjusts PH to 9-0 or so and carries out mud-water separation, and residence time of second mixed liquor in the first sedimentation basin 4 is 1h；Second is mixed
It is 140mg/L, Cr to close liquid and upper strata COD is obtained after 4 mud-water separation of the first sedimentation basin6+<The clear liquid of 0-1mg/L and lower floor are dirty
Mud, wherein lower floor's sludge pumping to sludge treating system, every liter of wastewater sludge yield is 12.2- after handling in this example
13.5g (moisture content about 80%)；
Nickel-containing waste water is sent to the 3rd pretreatment unit 3, and the COD of the waste water is 380mg/L, PH between 4-5, Ni2+For
242mg/L、NH3- N is 60mg/L, and adjusting PH to 8-0-8-5 or so through compound alkali obtains the 3rd mixed liquor, above-mentioned 3rd mixing
Liquid is pumped to the second sedimentation basin 5, carries out mud-water separation, residence time of the 3rd mixed liquor in the second sedimentation basin 5 is 1h；3rd
It is 300mg/L, Ni that mixed liquor obtains upper strata COD after 5 mud-water separation of the second sedimentation basin2+Clear liquid and lower floor for 120mg/L
Sludge, wherein lower floor's sludge pumping to sludge treating system, every liter of wastewater sludge yield is 7.9- after handling in this example
8.5g (moisture content about 80%)；
Converged through the pretreated three kinds of mixed liquors of first, second, third pretreatment unit to comprehensive wastewater regulating reservoir 6,
Sent after comprehensive wastewater mixing to integrated water fenton oxidation ponds 7, the COD of the waste water is 420mg/L, PH between 2-3, Ni2+For
163mg/L、Cu2+For 40-50mg/L, CN-For 15mg/L, NH3- N is 75mg；Add the H of 100ppm2O2(technical grade,
27.5%), reaction time 60-90min, the stir speed (S.S.) of mechanical stirring equipment is 60r/min, obtains the 4th mixing
Liquid.4th mixed liquor is pumped to the 3rd sedimentation basin 8 after PH is adjusted, and carries out mud-water separation, and the 4th mixed liquor is heavy the 3rd
Residence time in shallow lake pond 8 is 1-5h；4th mixed liquor obtains upper strata COD after 8 mud-water separation of the 3rd sedimentation basin and is
200mg/L、Ni2+For 22-6mg/L, Cu2+For 15-4mg/L, NH3- N is the clear liquid and lower floor's sludge of 52mg/L, and wherein lower floor is dirty
Mud is pumped to sludge treating system, and (moisture content is about for 12.3-12.9g for every liter of wastewater sludge yield after handling in this example
80%)；
Supernatant liquor after the separation of the 3rd sedimentation basin 8 obtains after 11 denitrogenation dephosphorizing of two level broken cyanide pond 9 and biochemical subsystem
It is 126mg/L, Ni to COD2+For 0-35mg/L, Cu2+For 0-22mg/L, NH3- N is the clear liquid of 35mg/L；
Biochemical 11 water outlet of subsystem is sent to advanced treating pond 12, and seven water of 300ppm are added after PH is adjusted to 9.0-9.5
Close ferrous sulfate and oxidant (sodium hypochlorite), oxidant dosage is by controlling ORP value to be carried out for 200-300mv
Adjust, reaction time 30min, the stir speed (S.S.) of mechanical stirring equipment is 45r/min, obtains the 5th mixed liquor；5th
It is 55mg/L, Ni that mixed liquor obtains upper strata COD after 13 mud-water separation of the 5th sedimentation basin2+For 0-1mg/L, Cu2+For 0-1mg/
L, NH3- N is the clear liquid and lower floor's sludge of 10mg/L, wherein lower floor's sludge pumping to sludge treating system, is handled in this example
Every liter of wastewater sludge yield is 3.2-3.6g (moisture content about 80%) afterwards.
Comprehensive wastewater is can be seen that after the processing of deep oxidation pond 12 by the data of attached drawing 4, COD, Ni2+、CU2+
And NH3- N has obvious reduction, and the clear liquid that 13 mud-water separation of the 5th sedimentation basin obtains can meet by national environmental protection in 2008
What portion and quality supervision and inspection quarantine general bureau joint were issued《Electroplate pollutant emission standard (GB 21900-2008)》.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative for the purpose of the present invention, and non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (10)
- A kind of 1. electroplating wastewater advanced treatment system, it is characterised in that including：First pretreatment unit, for cyanide wastewater Pretreatment；Second pretreatment unit, the pretreatment for chromate waste water；3rd pretreatment unit, the pre- place for nickel-containing waste water Reason；The liquid outlet of first, second, third pretreatment unit is respectively connected to the comprehensive regulating reservoir that catchments；The synthesis is catchmented Regulating reservoir is sequentially connected integrated water fenton oxidation ponds, the 3rd sedimentation basin, two level broken cyanide pond, the 4th sedimentation basin, biochemistry in order Subsystem, deep oxidation pond and the 5th sedimentation basin.
- 2. electroplating wastewater advanced treatment system as claimed in claim 1, it is characterised in that the first pretreatment unit bag Include：Cyanide wastewater regulating reservoir, the cyanide wastewater regulating reservoir are connected with one first vacuum pump and the second vacuum pump, and described first is true Sky pump and the second vacuum-pump line converge concentration and are connected to the first broken cyanide pond, and the first broken cyanide pond is sequentially connected the second broken cyanide pond With overcurrent pond, the final pipeline in overcurrent pond is connected to the synthesis and catchments regulating reservoir；Second pretreatment unit includes：Chromate waste water regulating reservoir, the chromate waste water regulating reservoir are connected with the 3rd vacuum pump With the 4th vacuum pump, the 3rd vacuum pump and the 4th vacuum-pump line converge concentration and are connected to Cr6+Reduce pond, the Cr6+Also Former pond is sequentially connected first, and mixed pond, first mix pond and first sedimentation basin slowly soon；The final pipeline connection of first sedimentation basin Catchment regulating reservoir to the synthesis；3rd pretreatment unit includes：Nickel-containing waste water PH regulating reservoirs, the nickel-containing waste water PH regulating reservoirs are sequentially connected second Mixed pond, second sedimentation basin, nickel-containing waste water intermediate pool, the nickel-containing waste water intermediate pool are connected with the 5th slowly for mixed pond, second soon Vacuum pump and the 6th vacuum pump, the 5th vacuum pump and the 6th vacuum-pump line, which converge concentration and be connected to the synthesis, to catchment tune Save pond.
- 3. electroplating wastewater advanced treatment system as claimed in claim 1 or 2, it is characterised in that the integrated water fenton oxygen Changing pond includes：First reduction pond, the first reduction pond are sequentially connected the 3rd mixed pond and described 3rd heavy slowly of mixed pond, the 3rd soon Shallow lake pond；3rd sedimentation basin is connected to the two level broken cyanide pond by pipeline.
- 4. electroplating wastewater advanced treatment system as claimed in claim 3, it is characterised in that the two level broken cyanide pond includes：The One regulating reservoir, first regulating reservoir are sequentially connected heavy metal reaction tank, the 4th mixed pond and the 4th sedimentation basin slowly；It is described 4th sedimentation basin is also associated with a readjustment pond, and the readjustment pond is connected to the biochemical subsystem by pipeline.
- 5. electroplating wastewater advanced treatment system as claimed in claim 4, it is characterised in that the biochemistry subsystem includes：Detest Oxygen pond, the anaerobic pond are sequentially connected level-one aerobic tank, two level aerobic tank, the 2nd PH regulating reservoirs, and the 2nd PH regulating reservoirs are most The deep oxidation pond is connected to by pipeline eventually.
- 6. a kind of electroplating wastewater advanced treatment process, it is characterised in that the first step, cyanide wastewater is pre-processed, and obtains One mixed liquor；Chromate waste water is sent into row pretreatment, obtains the second mixed liquor；Nickel-containing waste water is pre-processed, and it is mixed to obtain the 3rd Close liquid；Second step, after above-mentioned three kinds of mixed liquors are mixed, is sent into fenton oxidation ponds and is handled, add the H of 100ppm2O2, instead Should it be 60-90min the residence times；The stir speed (S.S.) of mechanical stirring equipment is 60r/min；Finally obtain the 4th mixed liquor；It is described 4th mixed liquor carries out mud-water separation, and the clear liquid and lower floor's sludge on upper strata are obtained after separation, and lower floor's sludge is sent to sludge Reason system；3rd step, the clear liquid that supernatant liquor described above obtained after denitrogenation dephosphorizing is sent to advanced treating, through depth The 5th mixed liquor is obtained after reason, after mud-water separation, obtained sludge is sent to sewage disposal system the 5th mixed liquor, is obtained The supernatant arrived carries out qualified discharge.
- 7. electroplating wastewater advanced treatment process as claimed in claim 6, it is characterised in that the above-mentioned first step, by cyanide wastewater Send to the first pretreatment unit, first pretreatment unit and add 27.5%H2O2, and it is 200-300mv to control ORP value, altogether After reaction time is 40min, the stir speed (S.S.) of mechanical stirring equipment is 60r/min, finally, obtains the first mixed liquor.
- 8. electroplating wastewater advanced treatment process as claimed in claim 7, it is characterised in that send chromate waste water to the second pre- place Device is managed, reducing agent sodium pyrosulfite is added in second pretreatment unit, and it is 200-300mv to control ORP value, it is anti-altogether It should be 15min the residence times, the stir speed (S.S.) of mechanical stirring equipment is 60r/min, obtains the second mixed liquor；Described second is mixed Close liquid and adjust the progress mud-water separations of PH to 9.0 or so, residence time 1h through compound alkali.
- 9. electroplating wastewater advanced treatment process as claimed in claim 8, it is characterised in that send nickel-containing waste water to the 3rd pre- place Device is managed, adjusting PH through compound alkali in the 3rd pretreatment unit controls in 8.0-8.5 or so, obtains the 3rd mixed liquor；On State the 3rd mixed liquor and carry out mud-water separation, residence time 1h.
- 10. electroplating wastewater advanced treatment process as claimed in claim 9, it is characterised in that the deep oxidation processing is through PH The green vitriol and oxidant of 300ppm are being added after adjusting to 9.0-9.5, oxidant dosage is controlled by controlling ORP value processed is adjusted for 200-300mv, reaction time 30min, and the stir speed (S.S.) of mechanical stirring equipment is 45r/min, obtains the 5th mixed liquor.
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| CN112159031A (en) * | 2020-09-14 | 2021-01-01 | 重庆文理学院 | Electroplating effluent advanced treatment system |
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