CN106517597A - Electroplating nickel-containing wastewater treatment system - Google Patents
Electroplating nickel-containing wastewater treatment system Download PDFInfo
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- CN106517597A CN106517597A CN201611208149.4A CN201611208149A CN106517597A CN 106517597 A CN106517597 A CN 106517597A CN 201611208149 A CN201611208149 A CN 201611208149A CN 106517597 A CN106517597 A CN 106517597A
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- filter
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- water
- regulating reservoir
- cartridge filter
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title abstract description 74
- 229910052759 nickel Inorganic materials 0.000 title abstract description 31
- 238000004065 wastewater treatment Methods 0.000 title abstract description 4
- 238000009713 electroplating Methods 0.000 title abstract 2
- 239000002351 wastewater Substances 0.000 claims abstract description 120
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 43
- 239000010802 sludge Substances 0.000 claims abstract description 41
- 238000001728 nano-filtration Methods 0.000 claims abstract description 39
- 239000000126 substance Substances 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims description 79
- 238000003825 pressing Methods 0.000 claims description 54
- 239000012528 membrane Substances 0.000 claims description 40
- 238000000108 ultra-filtration Methods 0.000 claims description 34
- 238000007747 plating Methods 0.000 claims description 26
- 238000004062 sedimentation Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 17
- 238000011001 backwashing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 110
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- 239000002455 scale inhibitor Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 43
- 230000008569 process Effects 0.000 description 38
- 238000001556 precipitation Methods 0.000 description 18
- 239000003344 environmental pollutant Substances 0.000 description 14
- 238000001914 filtration Methods 0.000 description 14
- 231100000719 pollutant Toxicity 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 230000033228 biological regulation Effects 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 8
- 239000006228 supernatant Substances 0.000 description 8
- 241000700605 Viruses Species 0.000 description 7
- 230000000844 anti-bacterial effect Effects 0.000 description 7
- 239000000084 colloidal system Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000003672 processing method Methods 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 239000002158 endotoxin Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000001764 infiltration Methods 0.000 description 5
- 238000007781 pre-processing Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- -1 part salinity Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000001934 delay Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-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
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- NLOPQPYYYDEHAG-UHFFFAOYSA-N [N].N.[Cu] Chemical compound [N].N.[Cu] NLOPQPYYYDEHAG-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- VXFKMOLPHLQGLH-UHFFFAOYSA-N dicyanophosphanylformonitrile Chemical compound N#CP(C#N)C#N VXFKMOLPHLQGLH-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 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
- C02F1/001—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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of industrial wastewater treatment equipment, and discloses an electroplating nickel-containing wastewater treatment system. The system includes a wastewater pretreatment system, a first security filter, a nanofiltration device, a second security filter and a reverse osmosis device, wherein the wastewater pretreatment system, the first security filter, the nanofiltration device, the second security filter and the reverse osmosis device are connected in sequence; wastewater subjected to the pretreatment using the wastewater pretreatment system is pumped into the first security filter (a scale inhibitor is added in the wastewater); the water discharged from the first security filter is pumped into the nanofiltration device; the wastewater obtained after nanofiltration is pumped into the second security filter, the wastewater obtained after the treatment of the second security filter is pumped into the reverse osmosis device, and the water discharged from the reverse osmosis device reaches the standard. The system is simple in structure and can significantly reduce the usage amount of chemicals, and the amount of sludge and the secondary pollution are reduced.
Description
Technical field
The present invention relates to industrial waste water disposal device technical field, more particularly, to a kind of place of Ni-containing Plating Wastewater
Reason system.
Background technology
Nickel-containing waste water essentially from nickel plating production line rinse water, as nickel is the first pollutant, it is therefore desirable to individually locate
Reason is up to standard could to discharge.Conventional processing method is:(1)Such waste water is controlled pH 11 or so, stable hydrogen can be generated
Oxide precipitation and remove, the waste water of this method need workshop be collected separately individual processing it is up to standard after discharge;(2)Additionally,
If containing hypophosphorous acid, phosphorous acid, ortho phosphorous acid in waste water, complexation nickel can be formed, phosphorus is will also result in exceeded.It is general to utilize chemistry
Oxidizing process can destroy its structure, generate calcium phosphate precipitation and nickel hydroxide precipitate.In the general nickel-containing waste water after precipitation
Nickel content in 0.5mg/L or so.A few class waste water according to the difference of discharge standard, may be also needed after materializing strategy above
It is further processed, such as biochemical treatment, multi-medium filtering, activated carbon filtration, ion-exchange treatment, ozone oxidation etc. are deep
Degree process, to reach the requirement of discharge standard.
Jing after the process of above-mentioned processing mode, the nickel content in nickel-containing waste water is typically in 0.5mg/L or so, and has fluctuation, no
Discharge standard can be stably reached, above-mentioned processing mode is strict to operating service requirement, and the probability for artificially causing nickel exceeded is larger
(The size of dosage affects), cause the nickel in waste water to be difficult stably reaching standard.
The content of the invention
The technical problem to be solved is the drawbacks described above for overcoming prior art to exist, there is provided a kind of plating is nickeliferous
The processing system of waste water.
The purpose of the present invention is achieved by the following technical programs:
A kind of processing system of Ni-containing Plating Wastewater, including the waste water pretreatment system being sequentially connected, the first cartridge filter, receives
Filter device, the second cartridge filter and reverse osmosis unit.
The operation principle of present treatment system is:(1)Alkali is first added in Ni-containing Plating Wastewater, adjusts Ni-containing Plating Wastewater
PH value is 4.5~5.5;(2)The float in waste water after removal regulation pH, antibacterial, virus, colloid, macromole, make waste water
Turbidity is less than 5 less than 1, SDI;(3)By step(2)Waste water after process is pumped in the first cartridge filter(And add in waste water
Enter antisludging agent);(4)By step(3)The water outlet of the first cartridge filter is pumped in nanofiltration device;(5)By step(4)Nanofiltration device
Waste water after filtration is pumped in the second cartridge filter;(6)By step(5)Waste water after the process of second cartridge filter is pumped into instead
In permeability apparatus, the water outlet of reverse osmosis unit can be up to standard.
Step(3)The first cartridge filter and step(5)The second cartridge filter filter be mainly used in retention it is preposition
The mechanical admixture that may be leaked in pipeline, equipment or the granule of rupture, it is ensured that the cleannes of follow-up counter-infiltration system water inlet, in case
The mechanical admixture of prime filter leaks enters reverse-osmosis membrane element, and this granule may puncture reverse osmosiss Jing after high-pressure pump acceleration
Membrane component, causes the leakage of a large amount of salts, while the impeller of high-pressure pump may be scratched.Step(4)Nanofiltration device filter point
Disembark reason for screening and dissolving spread and deposit, while and have electrical charge rejection effect, effectively can remove bivalence and multivalence from
Son, all kinds of materials for removing molecular weight about 200~1000, can partly remove the material of monovalention and molecular weight less than 200,
Filter through nanofiltration device, the bivalence and multivalent ion of the overwhelming majority have been concentrated in dope, can mitigate significantly follow-up anti-
The pressure of osmosis system, extends the life-span of reverse-osmosis membrane element.Step(6)Reverse osmosis unit can remove and process exhausted big in water
The impurity such as part salinity, colloid, antibacterial, virus, bacterial endotoxin and most of Organic substance, as the existing nanofiltration device of leading portion will
The bivalence of the overwhelming majority and multivalent ion are removed, and most of in the water of counter-infiltration system is monovalence pollutant, dirty stifled situation
Can alleviate significantly.
Above-mentioned steps(1)And step(2)For the preprocessing process of waste water, realized by waste water pretreatment system, be to realize step
Suddenly(2)Purpose, there are various achievable modes, as being preferred embodiment:By step(1)At the first regulating reservoir
Waste water after reason is precipitated into sedimentation tank, and the sludge after precipitation enters sludge collecting pit, subsequently carries out through filter-pressing device
Filter pressing is processed, and the filtrate obtained by filter pressing carries out the regulation of water quality and the water yield into the second regulating reservoir, at gained solid sludges outward transport
Reason, the supernatant after precipitation pump into more medium filter, carry out filtration treatment to the float in waste water, and more medium filter goes out
Water water quality SDI≤4;More medium filter water outlet is pumped into into ultrafiltration apparatus(There is very much ultrafilter membrane), filtration reaction is carried out, water outlet is kept in
In the ultrafiltration water tank of ultrafiltration apparatus, backwashing pump in ultrafiltration apparatus, is provided with, the water of ultrafiltration concentrated water side is extracted to super using backwashing pump
Filter membrane is washed away, and realizes interior circulation, and in the case of reducing producing water, pollutant are regularly taken using pumping to ultrafilter membrane blockage of the micro orifice
Water in ultrafiltration water tank carries out backwash to ultrafilter membrane.
It is therefore preferred that the waste water pretreatment system includes that the first regulating reservoir being sequentially connected, sedimentation tank, sludge are received
Ji Chi, filter-pressing device, the second regulating reservoir, more medium filter and ultrafiltration apparatus.
Preferably, the ultrafiltration apparatus are provided with backwashing pump, and backwashing pump extracts the water of ultrafiltration concentrated water side and ultrafilter membrane is carried out
Wash away, realize interior circulation.
In order to save equipment cost, it is regulating reservoir that can merge the first regulating reservoir and the second regulating reservoir, it is highly preferred that described
Waste water pretreatment system includes regulating reservoir, sedimentation tank, sludge collecting pit, filter-pressing device, more medium filter and ultrafiltration apparatus, its
In, one end of regulating reservoir is connected with sedimentation tank, sludge collecting pit, filter-pressing device successively, and the other end of regulating reservoir is situated between with successively
Mass filter is connected with ultrafiltration apparatus, and the other end of the filter-pressing device also leads to regulating reservoir.
In order to adjust the water yield of system below, improve the life-span of pump, it is convenient to overhaul, it is preferable that second regulating reservoir and
Intermediate pool is additionally provided between more medium filter.
In order to realize step(2)Purpose, another preferred embodiment is:By step(1)Through the first regulating reservoir
Waste water after process is precipitated, and the sludge after precipitation enters sludge collecting pit, subsequently carries out filter pressing process through filter-pressing device,
Filtrate obtained by filter pressing carries out the regulation of water quality and the water yield into the second regulating reservoir, and the outward transport of gained solid sludges is processed, after precipitation
Supernatant enter membrane chemical reactor(MCR)In, carry out suspended substance removal.
It is therefore preferred that the waste water pretreatment system includes that the first regulating reservoir being sequentially connected, sedimentation tank, sludge are received
Ji Chi, filter-pressing device, the second regulating reservoir, membrane chemical reactor.
In order to save equipment cost, it is regulating reservoir that can merge the first regulating reservoir and the second regulating reservoir, it is highly preferred that described
Waste water pretreatment system includes regulating reservoir, sedimentation tank, sludge collecting pit, filter-pressing device, membrane chemical reactor, wherein, regulating reservoir
One end be connected with sedimentation tank, sludge collecting pit, filter-pressing device successively, the other end of regulating reservoir is connected with membrane chemical reactor,
The other end of the filter-pressing device also leads to regulating reservoir.
In order to realize step(2)Purpose, another preferred embodiment is:By step(1)Through the first regulating reservoir
Waste water after process enters DF concentration basins(Containing DF films), by the mixed liquor in DF concentration basins pump into DF films carry out it is dense
Contracting, DF are produced water and produce pond into DF, and the mixed liquor after concentration enters the 2nd DF concentration basins, and the sludge of the 2nd DF concentration basins bottom enters
Entering sludge collecting pit, subsequently filter pressing process being carried out through filter-pressing device, the filtrate obtained by filter pressing enters water-filling into the second regulating reservoir
The regulation of matter and the water yield, the outward transport of gained solid sludges are processed.
It is preferred that the waste water pretreatment system include being sequentially connected the first regulating reservoir, DF concentration basins, DF
Produce pond, the 2nd DF concentration basins, sludge collecting pit, filter-pressing device and the second regulating reservoir.
In order to save equipment cost, the first regulating reservoir and the second regulating reservoir can be merged for regulating reservoir, DF concentration basins
DF concentration basins are merged into the 2nd DF concentration basins, it is highly preferred that the waste water pretreatment system include regulating reservoir, DF concentration basins,
DF produces pond, sludge collecting pit, filter-pressing device;Wherein, one end of regulating reservoir is produced pond with DF concentration basins, DF successively and is connected, DF
Concentration basin is also connected with sludge collecting pit, filter-pressing device successively, and the other end of the filter-pressing device also leads to regulating reservoir, the DF
Concentration basin and DF to be produced and be additionally provided with return duct between pond.
Preferably, first cartridge filter and the second cartridge filter are using 5 μm of filter element.
Add antisludging agent in waste water in the first cartridge filter and the second cartridge filter is pumped into respectively for convenience,
Preferably, between the waste water pretreatment system and the first cartridge filter, between nanofiltration device and the second cartridge filter
It is provided with dosing tank.
Compared with prior art, the invention has the advantages that:
The invention provides a kind of processing system of Ni-containing Plating Wastewater, including the waste water pretreatment system being sequentially connected, first
Cartridge filter, nanofiltration device, the second cartridge filter and reverse osmosis unit, after wastewater treatment, the water outlet of reverse osmosis unit is
Can be up to standard;The system structure is simple, can significantly reduce the usage amount of chemical agent, reduces sludge quantity and secondary pollution.
Description of the drawings
Connection diagrams of the Fig. 1 for system described in embodiment 1.
Connection diagrams of the Fig. 2 for system described in embodiment 2.
Connection diagrams of the Fig. 3 for system described in embodiment 3.
Connection diagrams of the Fig. 4 for system described in embodiment 4.
Another kind of connection diagrams of the Fig. 5 for system described in embodiment 2.
Another kind of connection diagrams of the Fig. 6 for system described in embodiment 3.
Another kind of connection diagrams of the Fig. 7 for system described in embodiment 4.
Description of reference numerals:1- waste water pretreatment systems;The first cartridge filters of 2-;3- that filter device;4- second ensures public security
Filter;5- reverse osmosis units;6- dosing tanks;7- return ducts;8- regulating reservoirs;9-DF concentration basins;The first regulating reservoirs of 111-;112-
Sedimentation tank;113- sludge collecting pits;114- filter-pressing devices;The second regulating reservoirs of 115-;116- more medium filters;117- ultrafiltration is filled
Put;118- backwashing pumps;119- intermediate pools;121- membrane chemical reactors;The first DF concentration basins of 131-;132-DF produces pond;
The 2nd DF concentration basins of 133-.
Specific embodiment
Patent of the present invention is further described with reference to specification drawings and specific embodiments.Wherein, accompanying drawing
Being for illustration only property illustrates that expression is only schematic diagram, rather than pictorial diagram, it is impossible to be interpreted as the restriction to this patent;In order to more
Illustrate well the embodiment of patent of the present invention, accompanying drawing some parts have omission, zoom in or out, and do not represent actual product
Size;It will be understood by those skilled in the art that some known features and its possible omission of explanation will be understood by accompanying drawing.
Embodiment 1
As shown in figure 1, present embodiments providing a kind of processing system of Ni-containing Plating Wastewater, locate including the waste water being sequentially connected in advance
Reason system 1, the first cartridge filter 2, nanofiltration device 3, the second cartridge filter 4 and reverse osmosis unit 5.
The operation principle of present treatment system is:(1)Alkali is first added in Ni-containing Plating Wastewater, adjusts Ni-containing Plating Wastewater
PH value is 4.5~5.5;(2)The float in waste water after removal regulation pH, antibacterial, virus, colloid, macromole, make waste water
Turbidity is less than 5 less than 1, SDI;(3)By step(2)Waste water after process is pumped in the first cartridge filter 2(And add in waste water
Enter antisludging agent);(4)By step(3)The water outlet of the first cartridge filter 2 is pumped in nanofiltration device 3;(5)By step(4)Nanofiltration is filled
Put the waste water after 3 filtrations to pump in the second cartridge filter 4;(6)By step(5)Waste water after the process of second cartridge filter 4
Pump in reverse osmosis unit 5, the water outlet of reverse osmosis unit 5 can be up to standard.
Step(3)The first cartridge filter 2 and step(5)The second cartridge filter 4 filter be mainly used in retention before
The mechanical admixture that may be leaked in putting pipeline, equipment or the granule of rupture, it is ensured that the cleannes of follow-up counter-infiltration system water inlet, with
The mechanical admixture of anti-prime filter leaks enters reverse-osmosis membrane element, and this granule may puncture reverse osmosis Jing after high-pressure pump acceleration
Membrane element, causes the leakage of a large amount of salts, while the impeller of high-pressure pump may be scratched.Step(4)Nanofiltration device 3 filter
Separating mechanism is that screening and dissolving are spread and deposited, while and there is electrical charge rejection effect, can effectively remove bivalence and multivalence
Ion, all kinds of materials for removing molecular weight about 200~1000, can partly remove the thing of monovalention and molecular weight less than 200
Matter, filters through nanofiltration device 3, and the bivalence and multivalent ion of the overwhelming majority have been concentrated in dope, after can mitigating significantly
The pressure of continuous counter-infiltration system, extends the life-span of reverse-osmosis membrane element.Step(6)Reverse osmosis unit 5 can remove process water in
Most salinities, colloid, antibacterial, virus, the impurity such as bacterial endotoxin and most of Organic substance, due to the existing nanofiltration of leading portion
The bivalence of the overwhelming majority and multivalent ion are removed by device 3, and most of in the water of counter-infiltration system is monovalence pollutant, dirty
Stifled situation can be alleviated significantly.
Above-mentioned steps(1)And step(2)For the preprocessing process of waste water, realized by waste water pretreatment system 1.
In the present embodiment, first cartridge filter and the second cartridge filter are using 5 μm of filter element.
Add scale inhibition in waste water in the first cartridge filter 2 and the second cartridge filter 4 is pumped into respectively for convenience
Agent, in the present embodiment, between the waste water pretreatment system 1 and the first cartridge filter 2, nanofiltration device 3 and second ensured public security
Dosing tank 6 is equipped between filter 4.
Embodiment 2
For realizing step in embodiment 1(2)Purpose, waste water pretreatment system described in the present embodiment includes first for being sequentially connected
Regulating reservoir 111, sedimentation tank 112, sludge collecting pit 113, filter-pressing device 114, the second regulating reservoir 115,116 and of more medium filter
Ultrafiltration apparatus 117.
The preprocessing process of the waste water pretreatment system is:By step(1)After the pH of the first regulating reservoir 111 is processed
Waste water is precipitated into sedimentation tank 112, and the sludge after precipitation enters sludge collecting pit 113, subsequently enters through filter-pressing device 114
Row filter pressing is processed, and the filtrate obtained by filter pressing carries out the regulation of water quality and the water yield into the second regulating reservoir 115, outside gained solid sludges
Fortune process, the supernatant after precipitation pump into more medium filter 116, carry out filtration treatment, multimedium to the float in waste water
116 effluent quality SDI≤4 of filter;116 water outlet of more medium filter is pumped into into ultrafiltration apparatus 117(There is very much ultrafilter membrane), carry out
Reaction is filtered, water outlet is temporarily stored in the ultrafiltration water tank of ultrafiltration apparatus, is provided with backwashing pump 118, using backwashing pump in ultrafiltration apparatus 117
The water of 118 extraction ultrafiltration concentrated water sides is washed away to ultrafilter membrane, realizes interior circulation, and in the case of reducing producing water, pollutant are to ultrafiltration
Membrane micropore is blocked, and the water regularly taken using pumping in ultrafiltration water tank carries out backwash to ultrafilter membrane.
In the present embodiment, the ultrafiltration apparatus 117 are provided with backwashing pump 118, and backwashing pump 118 extracts the water of ultrafiltration concentrated water side
Ultrafilter membrane is washed away, interior circulation is realized.
In order to save equipment cost, it is regulating reservoir 8 that can merge the first regulating reservoir 111 and the second regulating reservoir 115, i.e., described
Waste water pretreatment system includes regulating reservoir 8, sedimentation tank 112, sludge collecting pit 113, filter-pressing device 114, more medium filter 116
With ultrafiltration apparatus 117, wherein, one end of regulating reservoir 8 successively with sedimentation tank 112, sludge collecting pit 113,114 phase of filter-pressing device
Even, the other end of regulating reservoir 8 is connected with more medium filter 116 and ultrafiltration apparatus 117 successively, the filter-pressing device 114 it is another
One end also leads to regulating reservoir 8.
In order to adjust the water yield of system below, improve the life-span of pump, convenient to overhaul, in the present embodiment, described second is adjusted
Intermediate pool 119 is additionally provided between pond 115 and more medium filter 116.
The method that Ni-containing Plating Wastewater is processed using the device, pH=1.5~2.5 of the nickel-containing waste water, CODcr is 200~
450mg/L, total copper are 5~10mg/L, and ammonia nitrogen is 15~35mg/L, and nickel is 150~400mg/L, 100~250mg/L of total phosphorus.Its
Processing method is comprised the following steps:
1st, pH regulator reaction:Nickel-containing waste water is through the first regulating reservoir 111(Quality is added using online pH instrument in nickel-containing waste water
Concentration is 10% sodium hydroxide solution), the pH value for adjusting waste water is 5.0, makes the most metal ion in waste water form heavy
Starch.
2nd, precipitation process:Waste water after process is precipitated into sedimentation tank 112, removes partial suspended thing and pollutant
Matter, the sludge after precipitation enter sludge collecting pit 113, subsequently carry out filter pressing process, the filter obtained by filter pressing through filter-pressing device 114
Liquid enters the 115 Jing water yields of the second regulating reservoir and water quality adjustment, and the outward transport of gained solid sludges is processed;After supernatant after precipitation is entered
Further process in continuous full membrane process.
3rd, multi-medium filtering:Supernatant after step 2 precipitation is introduced into intermediate pool 119(Intermediate pool 119 is to adjust
The section water yield of system below, such as no intermediate pool 119, influence whether the life-span of pump, it is likely that can dry tap first;And after
Continuous system is had no idea to stop maintenance etc. completely)It is temporary, more medium filter 116 is then pumped into again, to the suspension in waste water
Thing carries out filtration treatment(More medium filter 116 and is connect in membrane filtration, permeation filtration using the size filtrate of variable grain
The suspended material gone in eliminating water during tactile coagulation), by most suspended substance removal.Rockfill in filter sand and smokeless
Coal, in normal operation, effluent quality SDI≤4 of more medium filter.
4th, ultra-filtration filters:116 water outlet of more medium filter pumps into ultrafiltration apparatus and carries out filtration reaction, and water outlet is temporarily stored in ultrafiltration
In the ultrafiltration water tank of device, the water for extracting ultrafiltration concentrated water side using backwashing pump 118 is washed away to ultrafilter membrane, realizes interior circulation,
In the case of reducing producing water, pollutant are to ultrafilter membrane blockage of the micro orifice.
5th, cartridge filter is filtered:Water in ultrafiltration water tank is pumped in the first cartridge filter 2, the first cartridge filter
2 adopt precision for 5um filter element, for guarantee nanofiltration device 3 water inlet cleannes.Then, 3~5mg is added according to 1L waste water
The amount of antisludging agent adds the antisludging agent that concentration is 10% in waste water(By filtering positioned at waste water pretreatment system 1 and the first security personnel
Dosing tank 6 between device 2 is completed).
6th, the water outlet of the first cartridge filter 6 is pumped in nanofiltration device 3, NF membrane can filter the overwhelming majority bivalence and
Multivalent ion, delays the dirt of follow-up reverse osmosis membrane to block up.Nanofiltration water outlet is entered in nanofiltration water tank and is kept in.
7th, the second cartridge filter 4 is filtered:Nanofiltration water outlet is in the second cartridge filter 4 guaranteeing reverse osmosis unit 5
The cleannes of water inlet, cartridge filter adopt precision for the filter element of 5um.
8th, reverse osmosis unit 5:Second cartridge filter, 4 water outlet is pumped directly in reverse osmosis unit 5, and reverse osmosis unit can go
Except impurity such as most salinities, colloid, antibacterial, virus, bacterial endotoxin and the most of Organic substances processed in water, due to front
The bivalence of the overwhelming majority and multivalent ion have been removed by the existing nanofiltration device 3 of section, most of in the water of reverse osmosis unit 5
For monovalence pollutant, dirty stifled situation can be alleviated significantly, and reverse osmosis water outlet then can directly carry out reuse.
In the present embodiment, after said method process, which produces water and reaches nickel-containing waste water《Plating pollutant emission standard》
(GB21900-2008)3 standard of middle table.Produce water can direct reuse in industrial water.In water outlet, the content of nickel is less than 0.05ppm,
Medicament usage amount:4~5ppm of antisludging agent, compound alkali~1100ppm.
Effluent quality analysis result such as following table
Index | pH | Electrical conductivity | Total nickel | Total phosphorus | Cyanide | Total copper | Ammonia nitrogen | Total nitrogen | COD |
Unit | / | μs/cm2 | mg/L | mg/L | mg/L | mg/L | mg/L | mg/L | mg/L |
3 standard of table | 0.1 | 0.5 | 0.2 | 0.3 | 8 | 15 | 50 | ||
Raw water regulating reservoir | 2.06 | 8453 | 327 | 212 | 2.61 | 6.89 | 43 | 165 | 298 |
After step 1 process | 5.32 | 4666 | 302 | 206 | 2.41 | 1.59 | 41.2 | 163 | 205 |
One-level film(Nanofiltration) | 6.06 | 215 | 1.98 | 1.73 | 0.45 | 0.09 | 7.2 | 30 | 21 |
One-level film process effect | × | × | × | √ | √ | × | √ | ||
Secondary membrane(RO) | 6.42 | 41 | 0.03 | 0.15 | 0.13 | 0.03 | 2.3 | 10.1 | 13.7 |
Secondary membrane treatment effect | √ | √ | √ | √ | √ | √ | √ |
Indicate:One-level film refers to the NF membrane of step 6;Secondary membrane refers to the reverse osmosis membrane of step 8.
Embodiment 3
For realizing step in embodiment 1(2)Purpose, waste water pretreatment system described in the present embodiment includes first for being sequentially connected
Regulating reservoir 111, sedimentation tank 112, sludge collecting pit 113, filter-pressing device 114, the second regulating reservoir 115, membrane chemical reactor 121.
The preprocessing process of the waste water pretreatment system is:By step(1)Waste water after the process of the first regulating reservoir 111
Precipitated into sedimentation tank 112, the sludge after precipitation enters sludge collecting pit 113, is subsequently pressed through filter-pressing device 114
Filter is processed, and the filtrate obtained by filter pressing carries out the regulation of water quality and the water yield into the second regulating reservoir 115, at gained solid sludges outward transport
Reason, the supernatant after precipitation enter membrane chemical reactor 121(MCR)In, carry out suspended substance removal.
In order to save equipment cost, can merge the first regulating reservoir 111 and the second regulating reservoir 115 is regulating reservoir 8, this enforcement
In example, the waste water pretreatment system includes regulating reservoir 8, sedimentation tank 112, sludge collecting pit 113, filter-pressing device 114, membranization
Reactor 121, wherein, one end of regulating reservoir 8 is connected with sedimentation tank 112, sludge collecting pit 113, filter-pressing device 114 successively, is adjusted
The other end in section pond 8 is connected with membrane chemical reactor 121, and the other end of the filter-pressing device 114 also leads to regulating reservoir 8.
Using the processing method of the device Ni-containing Plating Wastewater of the embodiment, pH=1.5~2.5 of the nickel-containing waste water,
CODcr be 200~450mg/L, total copper be 5~20mg/L, ammonia nitrogen be 15~35mg/L, nickel be 150~400mg/L, total phosphorus 100
~250mg/L, its processing method are comprised the following steps:
1st, pH regulator reaction:Nickel-containing waste water is through the first regulating reservoir 111(Quality is added using online pH instrument in nickel-containing waste water
Concentration is 8% sodium hydroxide solution), the pH value for adjusting waste water is 4.5, makes the most metal ion in waste water form heavy
Starch.
2nd, precipitation process:Waste water after process is precipitated into sedimentation tank 112, removes partial suspended thing and pollutant
Matter, the sludge after precipitation enter sludge collecting pit 113, subsequently carry out filter pressing process, the filter obtained by filter pressing through filter-pressing device 114
Liquid enters the 115 Jing water yields of the second regulating reservoir and water quality adjustment, and the outward transport of gained solid sludges is processed;After supernatant after precipitation is entered
Further process in continuous MCR.
3rd, membrane chemical reactor(MCR):Supernatant after preliminary sedimentation is entered and carry out in MCR ponds 121 further float
Removal, carry out solid-liquid separation using film.
4th, cartridge filter is filtered:Water in ultrafiltration water tank is pumped in the first cartridge filter 2, the first cartridge filter
2 adopt precision for 5um filter element, for guarantee nanofiltration device 3 water inlet cleannes.Then, 3~5mg is added according to 1L waste water
The amount of antisludging agent adds the antisludging agent that concentration is 10% in waste water(By filtering positioned at waste water pretreatment system 1 and the first security personnel
Dosing tank 6 between device 2 is completed).
5th, the water outlet of the first cartridge filter 6 is pumped in nanofiltration device 3, NF membrane can filter the overwhelming majority bivalence and
Multivalent ion, delays the dirt of follow-up reverse osmosis membrane to block up.Nanofiltration water outlet is entered in nanofiltration water tank and is kept in.
6th, the second cartridge filter 4 is filtered:Nanofiltration water outlet is in the second cartridge filter 4 guaranteeing reverse osmosis unit 5
The cleannes of water inlet, cartridge filter adopt precision for the filter element of 5um.
7th, reverse osmosis unit 5:Second cartridge filter, 4 water outlet is pumped directly in reverse osmosis unit 5, and reverse osmosis unit can go
Except impurity such as most salinities, colloid, antibacterial, virus, bacterial endotoxin and the most of Organic substances processed in water, due to front
The bivalence of the overwhelming majority and multivalent ion have been removed by the existing nanofiltration device 3 of section, most of in the water of reverse osmosis unit 5
For monovalence pollutant, dirty stifled situation can be alleviated significantly, and reverse osmosis water outlet then can directly carry out reuse.
In the present embodiment, after said method process, which produces water and reaches nickel-containing waste water《Plating pollutant emission standard》
(GB21900-2008)3 standard of middle table.Produce water can direct reuse in industrial water.In water outlet, the content of nickel is less than 0.05ppm,
Medicament usage amount:4~5ppm of antisludging agent, compound alkali~1100ppm.
Embodiment 4
For realizing step in embodiment 1(2)Purpose, waste water pretreatment system described in the present embodiment includes first for being sequentially connected
Regulating reservoir 111, DF concentration basins 131, DF produce pond 132, the 2nd DF concentration basins 133, sludge collecting pit 113, filter-pressing device
114 and second regulating reservoir 115.
The preprocessing process of the waste water pretreatment system is:By step(1)Waste water after the process of the first regulating reservoir 111
Enter DF concentration basins 131(Containing DF films), the mixed liquor in DF concentration basins 131 is pumped into into DF films and is concentrated, DF
Producing water and being produced from pond 132 into DF, the mixed liquor after concentration enters the 2nd DF concentration basins 133, the dirt of 133 bottom of the 2nd DF concentration basins
Mud enters sludge collecting pit 113, subsequently carries out filter pressing process through filter-pressing device 114, and the filtrate obtained by filter pressing is adjusted into second
Section pond 115 carries out the regulation of water quality and the water yield, and the outward transport of gained solid sludges is processed.
In order to save equipment cost, can merge the first regulating reservoir 111 and the second regulating reservoir 115 is regulating reservoir 8, a DF
Concentration basin 131 and the 2nd DF concentration basins 133 merge into DF concentration basins 9, and in the present embodiment, the waste water pretreatment system includes adjusting
Section pond 8, DF concentration basins 9, DF produce pond 132, sludge collecting pit 113, filter-pressing device 114;Wherein, one end of regulating reservoir 8 is successively
Is produced from pond 132 with DF concentration basins 9, DF to be connected, DF concentration basins 9 are also connected with sludge collecting pit 113, filter-pressing device 114 successively, institute
The other end for stating filter-pressing device 114 also leads to regulating reservoir 8, and the DF concentration basins 9 and DF to be produced and be additionally provided with return duct between pond 132
7。
The processing method of Ni-containing Plating Wastewater is carried out using the embodiment device, pH=1.5~2.5 of the nickel-containing waste water,
CODcr be 200~450mg/L, total copper be 5~20mg/L, ammonia nitrogen be 15~35mg/L, nickel be 150~400mg/L, total phosphorus 100
~250mg/L, its processing method are comprised the following steps:
1st, pH regulator reaction:Nickel-containing waste water is through the first regulating reservoir 111(Hydrogen-oxygen is added using online pH instrument in nickel-containing waste water
Change sodium solution), the pH value for adjusting waste water is 5.5, makes the most metal ion formation precipitate in waste water.
2nd, DF process:Waste water after step 1 is adjusted pumps into DF concentration basins 131, mixed liquor pump into DF films carry out it is dense
Contracting, DF are produced water and produce pond 132 into DF, and the mixed liquor after concentration enters the 2nd DF concentration basins 133,133 bottom of the 2nd DF concentration basins
The sludge in portion enters sludge collecting pit 113, subsequently carries out filter pressing process through filter-pressing device 114, and the filtrate obtained by filter pressing enters
Second regulating reservoir, the 115 Jing water yields and water quality adjustment, the outward transport of gained solid sludges are processed.
3rd, cartridge filter is filtered:Water in ultrafiltration water tank is pumped in the first cartridge filter 2, the first cartridge filter
2 adopt precision for 5um filter element, for guarantee nanofiltration device 3 water inlet cleannes.Then, 3~5mg is added according to 1L waste water
The amount of antisludging agent adds the antisludging agent that concentration is 10% in waste water(By filtering positioned at waste water pretreatment system 1 and the first security personnel
Dosing tank 6 between device 2 is completed).
4th, the water outlet of the first cartridge filter 6 is pumped in nanofiltration device 3, NF membrane can filter the overwhelming majority bivalence and
Multivalent ion, delays the dirt of follow-up reverse osmosis membrane to block up.Nanofiltration water outlet is entered in nanofiltration water tank and is kept in.
5th, the second cartridge filter 4 is filtered:Nanofiltration water outlet is in the second cartridge filter 4 guaranteeing reverse osmosis unit 5
The cleannes of water inlet, cartridge filter adopt precision for the filter element of 5um.
6th, reverse osmosis unit 5:Second cartridge filter, 4 water outlet is pumped directly in reverse osmosis unit 5, and reverse osmosis unit can go
Except impurity such as most salinities, colloid, antibacterial, virus, bacterial endotoxin and the most of Organic substances processed in water, due to front
The bivalence of the overwhelming majority and multivalent ion have been removed by the existing nanofiltration device 3 of section, most of in the water of reverse osmosis unit 5
For monovalence pollutant, dirty stifled situation can be alleviated significantly, and reverse osmosis water outlet then can directly carry out reuse.
In the present embodiment, after said method process, which produces water and reaches nickel-containing waste water《Plating pollutant emission standard》
(GB21900-2008)3 standard of middle table.Produce water can direct reuse in industrial water.In water outlet, the content of nickel is less than 0.05ppm,
Medicament usage amount:4~5ppm of antisludging agent, compound alkali~1100ppm.
The above embodiment of the present invention is just for the sake of clearly demonstrating example of the present invention, and is not to this
The restriction of bright patent working mode.For those of ordinary skill in the field, on the basis of the above description can be with
Make other changes in different forms, there is no need to be exhaustive to all of embodiment.It is all at this
Any modification, equivalent and improvement for being made within the spirit of bright patent and spirit etc., should be included in of the invention special
Within the scope of economic rights profit is claimed.
Claims (9)
1. a kind of processing system of Ni-containing Plating Wastewater, it is characterised in that including the waste water pretreatment system being sequentially connected(1)、
First cartridge filter(2), nanofiltration device(3), the second cartridge filter(4)And reverse osmosis unit(5).
2. the processing system of Ni-containing Plating Wastewater according to claim 1, it is characterised in that the waste water pretreatment system
Including the first regulating reservoir being sequentially connected(111), sedimentation tank(112), sludge collecting pit(113), filter-pressing device(114), second
Regulating reservoir(115), more medium filter(116)And ultrafiltration apparatus(117).
3. the processing system of Ni-containing Plating Wastewater according to claim 2, it is characterised in that second regulating reservoir
(115)And more medium filter(116)Between be additionally provided with intermediate pool(119).
4. the processing system of Ni-containing Plating Wastewater according to claim 1, it is characterised in that the waste water pretreatment system
Including the first regulating reservoir being sequentially connected(111), sedimentation tank(112), sludge collecting pit(113), filter-pressing device(114), second
Regulating reservoir(115), membrane chemical reactor(121).
5. the processing system of Ni-containing Plating Wastewater according to claim 1, it is characterised in that the waste water pretreatment system
Including the first regulating reservoir being sequentially connected(111), DF concentration basins(131), DF produce pond(132), the 2nd DF concentration basins
(133), sludge collecting pit(113), filter-pressing device(114)With the second regulating reservoir(115).
6. the processing system of Ni-containing Plating Wastewater according to claim 2, it is characterised in that the ultrafiltration apparatus(117)
It is provided with backwashing pump(118).
7. the processing system of Ni-containing Plating Wastewater according to claim 5, it is characterised in that DF concentration basins
(131)With the 2nd DF concentration basins(133)On be equipped with DF films.
8. the processing system of the Ni-containing Plating Wastewater according to any one of claim 1 to 7, it is characterised in that described first
Cartridge filter(2)With the second cartridge filter(4)Using 5 μm of filter element.
9. the processing system of the Ni-containing Plating Wastewater according to any one of claim 1 to 7, it is characterised in that the waste water
Pretreatment system(1)With the first cartridge filter(2)Between, nanofiltration device(3)With the second cartridge filter(4)Between be equipped with
Dosing tank(6).
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