CN106495379B - A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique - Google Patents
A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique Download PDFInfo
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- CN106495379B CN106495379B CN201611064717.8A CN201611064717A CN106495379B CN 106495379 B CN106495379 B CN 106495379B CN 201611064717 A CN201611064717 A CN 201611064717A CN 106495379 B CN106495379 B CN 106495379B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 238000009713 electroplating Methods 0.000 title claims abstract description 74
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 87
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 67
- 238000005406 washing Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000001728 nano-filtration Methods 0.000 claims abstract description 16
- 230000003197 catalytic effect Effects 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 230000005622 photoelectricity Effects 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 25
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 24
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 150000002500 ions Chemical class 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- QDDJFNCPALBLEO-UHFFFAOYSA-N n-ethylethanamine;nitric acid Chemical compound O[N+]([O-])=O.CCNCC QDDJFNCPALBLEO-UHFFFAOYSA-N 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 239000005416 organic matter Substances 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 239000012510 hollow fiber Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 230000005693 optoelectronics Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 239000012141 concentrate Substances 0.000 abstract description 5
- 238000007747 plating Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000008235 industrial water Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- AHRQMWOXLCFNAV-UHFFFAOYSA-O ethylammonium nitrate Chemical compound CC[NH3+].[O-][N+]([O-])=O AHRQMWOXLCFNAV-UHFFFAOYSA-O 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 239000012266 salt solution Substances 0.000 description 4
- 241000894007 species Species 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 150000001408 amides Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000008237 rinsing water Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000337 buffer salt Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- -1 silicon carbide compound Chemical class 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/04—Oxidation reduction potential [ORP]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of electroplating rinse water circulating and recovering and heavy metal recovery technique：Milipore filter ultrafiltration → enter nanofiltration membrane treatment → into first-stage reverse osmosis membranous system is filtered → pass through by security filtration system by the electroplating rinse water of rinse bath discharge further to concentrate, milipore filter, NF membrane, first-stage reverse osmosis film production water into two-pass reverse osmosis film process → two-pass reverse osmosis film concentrated water return first-stage reverse osmosis membranous system concentration → to the electroplating rinse water after concentration handle using efficient photoelectricity treater catalytic unit and reclaim heavy metal.The present invention utilizes membrane technology and photo-electrocatalytic technology, realizes the circulating and recovering of electroplating rinse water, reduces plating industrial water amount, while the heavy metal resources in online recycling washings.The technology can reduce electroplating cleaning water consumption to greatest extent, while reduce pollution of the electroplating rinse water to environment.
Description
Technical field
The present invention relates to Industrial Wastewater Treatment and utilization technology field, is specifically related to a kind of electroplate rinsing water circulation
Reuse and heavy metal recovery technique.
Background technology
Plating is to improve the physical and chemical performances such as the electric conductivity of material, wearability, corrosion resistance, utilizes electrochemistry original
Reason, layer of metal or the process of alloy are plated in metal or non-metal material surface.After plating terminates, it is necessary to plating piece table
Face is thoroughly cleaned, therefore is had substantial amounts of electroplate rinsing wastewater and produced, and electroplate rinsing water consumption accounts for electroplating industry total water
More than the 80% of amount.
Electroplate the part as processing and manufacturing, it has also become the ring that its people Ministry of Industry of China can or lack.But electroplate simultaneously
During often there is substantial amounts of poaching wastewater to produce, typically contain substantial amounts of heavy metal ion, buffer salt, network in these waste water
The materials such as mixture, if can not effectively handle, serious harm can be caused to ecological environment and health.
At present, the main methods of electroplating wastewater have chemical precipitation method, absorption method, micro-electrolysis method, ion-exchange etc.,
These methods generally require to add substantial amounts of sewage treatment drug, and cost is high；It is difficult to the huge sum of money for removing complex state in electroplating wastewater
Category, shipwreck is produced to be up to state standards；The circulating and recovering of electroplating rinse water, while the heavy metal recovery in washings can not be realized
Difficulty, cause the wasting of resources；Substantial amounts of sludge is produced, easily causes secondary pollution.
At present, the method that heavy metal is reclaimed from electroplating wastewater is most first to add chemical agent into electroplating wastewater, will
Heavy metal precipitation separation in waste water, then precious metal is reclaimed from sludge, this method technological process length, and consume substantial amounts of
Medicament.
The content of the invention
It is big for electroplating rinse water yield, the present situation of difficulty is handled, the present invention is intended to provide a kind of electroplate rinsing water circulation
Reuse and the new technology of heavy metal online recycling, the water consumption of electroplate rinsing process can be both reduced, can fully reclaim weight again
Metals resources, eliminate pollution on the environment.
The technical scheme is that：A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique, including following step
Suddenly：
1) electroplating rinse water that rinse bath is discharged is passed through into security filtration system, it is 0.5~5 μm to select pore size filter, is gone
Except the granule foreign in waste water；
2) electroplating rinse water filtered through security filter is passed through into milipore filter, it is 0.005~0.01 μ to select pore size filter
M hollow fiber ultrafiltration membrane, the macromolecular organic pollution in washings is removed, while washings are carried out with initial concentration, warp
Milipore filter, the concentration of electroplating rinse water can be lifted 2 to 3 times；
3) further handled into nanofiltration membrane treatment system by the concentrated water of the electroplating rinse water after milipore filter initial concentration,
Nanofiltration membrane aperture is 1-2nm, and NF membrane can retain most organic matters and more than 80% divalent ion in rinse water,
Being separated by filtration by NF membrane simultaneously, can be more than 10 times again by the concentration of electroplating rinse water；
4) concentrated water Jing Guo nanofiltration membrane treatment further concentrates into first-stage reverse osmosis membranous system, by the dense of electroplating rinse water
5-100 times of degree lifting, makes the concentration of heavy metal ion of production water be less than 1mg/L, electrical conductivity is less than 50us/cm, reaches water for cleaning
Standard, can be with direct circulation reuse；Almost all of ionic species in rinse water can be retained using first-stage reverse osmosis film and are had
Machine material；
5) milipore filter, NF membrane, the production water of first-stage reverse osmosis film enter two-pass reverse osmosis film, at two-pass reverse osmosis film
Reason, makes the concentration of heavy metal ion of production water be reduced to below 1mg/L, electrical conductivity is less than 50us/cm, water for cleaning mark is fully achieved
Standard, as washings direct reuse；
6) concentrated water of two-pass reverse osmosis film returns to first-stage reverse osmosis membranous system concentration；
7) electroplating rinse water after concentration is handled using efficient photoelectricity treater catalytic unit, electroplating rinse water pH value is adjusted
Save as 4-9, the organic matter in electroplating rinse water deposits in titanium dioxide anodic oxidation, heavy metal in cathodic reduction, the negative electrode
Current potential is Ec=-0.9V--1.5V, anode potential 2-10V.By photoelectro catalytic system, the COD concentration in washings is dropped
As little as below 60mg/L, concentration of heavy metal ion are less than 0.1mg/L, electroplating wastewater discharge standard are fully achieved.
Further, in such scheme, electroplating rinse water first passes through classification before by the security filtration system
Collect, be easy to reclaim the single heavy metal of high-purity.
Further, in such scheme, efficient photoelectricity treater catalytic unit described in step 7) is photoelectricity from titanium dioxide
Pole.
Further, in such scheme, efficient photoelectricity treater catalytic unit described in step 7) is light source from ultraviolet light, electricity
Current density is 0.5-1.5mA/cm2。
Further, in such scheme, the membrane module of the step 3) NF membrane is rolled membrane module or tubular membrane group
Part, its condition of work are 15~40 DEG C, and operating pressure is 4~10bar.
Further, in such scheme, the first-stage reverse osmosis film is polyamide reverse osmose membrane.
Further, in such scheme, the two-pass reverse osmosis film is nanometer silicon carbide complex reverse osmosis membrane；It is described to receive
Rice silicon carbide compound reverse osmosis membrane preparation method be：Nanometer silicon carbide particle is pressed into (0.001-0.01):The weight of (3-10)
Than being added in nitric acid ethyl ammonium salt solution, make the nanometer silicon carbide even particulate dispersion in nitric acid diethyl ammonium solution, then
Porous support membrane is immersed in solution, is heat-treated, that is, obtains nanometer silicon carbide complex reverse osmosis membrane.The open support
Film is PS membrane, and the temperature of the heat treatment is 50-80 DEG C, and the duration of the heat treatment is 10-20 minutes.
The beneficial effects of the invention are as follows：The present invention utilizes membrane technology and photo-electrocatalytic technology, realizes electroplate rinsing
The circulating and recovering of water, reduce plating industrial water amount, while the heavy metal resources in online recycling washings.The technology can be with
Electroplating cleaning water consumption is reduced to greatest extent, while reduces pollution of the electroplating rinse water to environment.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
The present invention is further described in detail with reference to specific embodiment：
Embodiment 1
A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique, comprise the following steps：
1) electroplating rinse water that rinse bath is discharged is first passed through into categorised collection, is easy to reclaim the single heavy metal of high-purity,
Then security filtration system is passed through, it is 0.5 μm to select pore size filter, removes the granule foreign in waste water；
2) electroplating rinse water filtered through security filter is passed through into milipore filter, selects pore size filter as in 0.005 μm
Fibre ultrafiltration film, the macromolecular organic pollution in washings is removed, while initial concentration is carried out to washings, through ultrafiltration
Film, the concentration of electroplating rinse water can be lifted 2 times；
3) further handled into nanofiltration membrane treatment system by the concentrated water of the electroplating rinse water after milipore filter initial concentration,
Nanofiltration membrane aperture is 1nm, and the membrane module of NF membrane is rolled membrane module or tubular membrane component, and its condition of work is 15 DEG C, work
Pressure is 4bar；NF membrane can retain most organic matters and more than 80% divalent ion in rinse water, lead to simultaneously
Being separated by filtration for NF membrane is crossed, can be more than 10 times again by the concentration of electroplating rinse water；
4) concentrated water Jing Guo nanofiltration membrane treatment further concentrates into first-stage reverse osmosis membranous system, and first-stage reverse osmosis film is poly-
Acid amides reverse osmosis membrane, the concentration of electroplating rinse water is lifted 5 times, the concentration of heavy metal ion of production water is less than 1mg/L, electrical conductivity
Less than 50us/cm, reach water for cleaning standard, can be with direct circulation reuse；Rinse water can be retained using first-stage reverse osmosis film
In almost all of ionic species and organic substance；
5) milipore filter, NF membrane, the production water of first-stage reverse osmosis film enter two-pass reverse osmosis film, at two-pass reverse osmosis film
Reason, makes the concentration of heavy metal ion of production water be reduced to below 1mg/L, electrical conductivity is less than 50us/cm, water for cleaning mark is fully achieved
Standard, as washings direct reuse；Two-pass reverse osmosis film is nanometer silicon carbide complex reverse osmosis membrane；The compound reverse osmosis of nanometer silicon carbide
The preparation method of permeable membrane is：Nanometer silicon carbide particle is pressed 0.001:3 weight ratio is added in nitric acid ethyl ammonium salt solution, makes institute
State nanometer silicon carbide even particulate dispersion to be immersed in solution in nitric acid diethyl ammonium solution, then by porous support membrane, carry out
Heat treatment, porous support membrane are PS membrane, and the temperature of heat treatment is 50 DEG C, and the duration of heat treatment is 10 minutes；Obtain
Nanometer silicon carbide complex reverse osmosis membrane；
6) concentrated water of two-pass reverse osmosis film returns to first-stage reverse osmosis membranous system concentration；
7) electroplating rinse water after concentration is handled using efficient photoelectricity treater catalytic unit, is photoelectricity from titanium dioxide
Pole, it is light source from ultraviolet light, current density 0.5mA/cm2；Electroplating rinse water pH value is adjusted to 4, in electroplating rinse water
Organic matter in titanium dioxide anodic oxidation, heavy metal deposits in cathodic reduction, and the cathode potential is Ec=-0.9V, anode
Current potential is 2V；By photoelectro catalytic system, the COD concentration in washings is reduced to below 60mg/L, concentration of heavy metal ion
Less than 0.1mg/L, electroplating wastewater discharge standard is fully achieved.
Embodiment 2
A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique, comprise the following steps：
1) electroplating rinse water that rinse bath is discharged is first passed through into categorised collection, is easy to reclaim the single heavy metal of high-purity,
Then security filtration system is passed through, it is 2.75 μm to select pore size filter, removes the granule foreign in waste water；
2) electroplating rinse water filtered through security filter is passed through into milipore filter, selects pore size filter as in 0.0075 μm
Fibre ultrafiltration film, the macromolecular organic pollution in washings is removed, while initial concentration is carried out to washings, through ultrafiltration
Film, the concentration of electroplating rinse water can be lifted 2.5 times；
3) further handled into nanofiltration membrane treatment system by the concentrated water of the electroplating rinse water after milipore filter initial concentration,
Nanofiltration membrane aperture is 1.5nm, and the membrane module of NF membrane is rolled membrane module or tubular membrane component, and its condition of work is 27.5 DEG C,
Operating pressure is 7bar；NF membrane can retain most organic matters and more than 80% divalent ion in rinse water, together
When being separated by filtration by NF membrane, can be more than 10 times again by the concentration of electroplating rinse water；
4) concentrated water Jing Guo nanofiltration membrane treatment further concentrates into first-stage reverse osmosis membranous system, and first-stage reverse osmosis film is poly-
Acid amides reverse osmosis membrane, the concentration of electroplating rinse water is lifted 52 times, the concentration of heavy metal ion of production water is less than 1mg/L, conductance
Rate is less than 50us/cm, reaches water for cleaning standard, can be with direct circulation reuse；Cleaning can be retained using first-stage reverse osmosis film
Almost all of ionic species and organic substance in water；
5) milipore filter, NF membrane, the production water of first-stage reverse osmosis film enter two-pass reverse osmosis film, at two-pass reverse osmosis film
Reason, makes the concentration of heavy metal ion of production water be reduced to below 1mg/L, electrical conductivity is less than 50us/cm, water for cleaning mark is fully achieved
Standard, as washings direct reuse；Two-pass reverse osmosis film is nanometer silicon carbide complex reverse osmosis membrane；The compound reverse osmosis of nanometer silicon carbide
The preparation method of permeable membrane is：Nanometer silicon carbide particle is pressed 0.0055:6.5 weight ratio is added in nitric acid ethyl ammonium salt solution,
The nanometer silicon carbide even particulate dispersion is set to be immersed in nitric acid diethyl ammonium solution, then by porous support membrane in solution,
It is heat-treated, porous support membrane is PS membrane, and the temperature of heat treatment is 65 DEG C, and the duration of heat treatment is 15 minutes；I.e.
Obtain nanometer silicon carbide complex reverse osmosis membrane；
6) concentrated water of two-pass reverse osmosis film returns to first-stage reverse osmosis membranous system concentration；
7) electroplating rinse water after concentration is handled using efficient photoelectricity treater catalytic unit, is photoelectricity from titanium dioxide
Pole, it is light source from ultraviolet light, current density 1.0mA/cm2；Electroplating rinse water pH value is adjusted to 6.5, electroplating rinse water
In organic matter in titanium dioxide anodic oxidation, heavy metal deposits in cathodic reduction, and the cathode potential be Ec=-1.2V, positive
Electrode potential is 6V；By photoelectro catalytic system, the COD concentration in washings is reduced to below 60mg/L, heavy metal ion is dense
Degree is less than 0.1mg/L, and electroplating wastewater discharge standard is fully achieved.
Embodiment 3
A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique, comprise the following steps：
1) electroplating rinse water that rinse bath is discharged is first passed through into categorised collection, is easy to reclaim the single heavy metal of high-purity,
Then security filtration system is passed through, it is 5 μm to select pore size filter, removes the granule foreign in waste water；
2) electroplating rinse water filtered through security filter is passed through into milipore filter, selects pore size filter hollow for 0.01 μm
Fiber ultrafiltration membrane, the macromolecular organic pollution in washings is removed, while initial concentration is carried out to washings, through milipore filter,
The concentration of electroplating rinse water can be lifted 3 times；
3) further handled into nanofiltration membrane treatment system by the concentrated water of the electroplating rinse water after milipore filter initial concentration,
Nanofiltration membrane aperture is 2nm, and the membrane module of NF membrane is rolled membrane module or tubular membrane component, and its condition of work is 40 DEG C, work
Pressure is 10bar；NF membrane can retain most organic matters and more than 80% divalent ion in rinse water, lead to simultaneously
Being separated by filtration for NF membrane is crossed, can be more than 10 times again by the concentration of electroplating rinse water；
4) concentrated water Jing Guo nanofiltration membrane treatment further concentrates into first-stage reverse osmosis membranous system, and first-stage reverse osmosis film is poly-
Acid amides reverse osmosis membrane, the concentration of electroplating rinse water is lifted 100 times, the concentration of heavy metal ion of production water is less than 1mg/L, conductance
Rate is less than 50us/cm, reaches water for cleaning standard, can be with direct circulation reuse；Cleaning can be retained using first-stage reverse osmosis film
Almost all of ionic species and organic substance in water；
5) milipore filter, NF membrane, the production water of first-stage reverse osmosis film enter two-pass reverse osmosis film, at two-pass reverse osmosis film
Reason, makes the concentration of heavy metal ion of production water be reduced to below 1mg/L, electrical conductivity is less than 50us/cm, water for cleaning mark is fully achieved
Standard, as washings direct reuse；Two-pass reverse osmosis film is nanometer silicon carbide complex reverse osmosis membrane；The compound reverse osmosis of nanometer silicon carbide
The preparation method of permeable membrane is：Nanometer silicon carbide particle is pressed 0.01:10 weight ratio is added in nitric acid ethyl ammonium salt solution, makes institute
State nanometer silicon carbide even particulate dispersion to be immersed in solution in nitric acid diethyl ammonium solution, then by porous support membrane, carry out
Heat treatment, porous support membrane are PS membrane, and the temperature of heat treatment is 80 DEG C, and the duration of heat treatment is 20 minutes；Obtain
Nanometer silicon carbide complex reverse osmosis membrane；
6) concentrated water of two-pass reverse osmosis film returns to first-stage reverse osmosis membranous system concentration；
7) electroplating rinse water after concentration is handled using efficient photoelectricity treater catalytic unit, is photoelectricity from titanium dioxide
Pole, it is light source from ultraviolet light, current density 1.5mA/cm2；Electroplating rinse water pH value is adjusted to 9, in electroplating rinse water
Organic matter in titanium dioxide anodic oxidation, heavy metal deposits in cathodic reduction, and the cathode potential is Ec=-1.5V, anode
Current potential is 10V；By photoelectro catalytic system, the COD concentration in washings is reduced to below 60mg/L, concentration of heavy metal ion
Less than 0.1mg/L, electroplating wastewater discharge standard is fully achieved.
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (5)
1. a kind of electroplating rinse water circulating and recovering and heavy metal recovery technique, it is characterised in that comprise the following steps：
1) electroplating rinse water that rinse bath is discharged is passed through into security filtration system, it is 0.5~5 μm to select pore size filter, is removed useless
Granule foreign in water；
2) electroplating rinse water filtered through security filtration system is passed through into milipore filter, it is 0.005~0.01 μm to select pore size filter
Hollow fiber ultrafiltration membrane, remove washings in macromolecular organic pollution, while to washings carry out initial concentration；
3) further handled into nanofiltration membrane treatment system by the concentrated water of the electroplating rinse water after milipore filter initial concentration, nanofiltration
Membrane aperture is 1-2nm；
4) concentrated water Jing Guo nanofiltration membrane treatment is further concentrated into first-stage reverse osmosis membranous system, and the concentration of electroplating rinse water is carried
5-100 times is risen, the concentration of heavy metal ion of production water is less than 1mg/L, electrical conductivity is less than 50us/cm, reaches water for cleaning standard,
Can be with direct circulation reuse；
5) milipore filter, NF membrane, the production water of first-stage reverse osmosis film enter two-pass reverse osmosis film, by two-pass reverse osmosis film process,
The concentration of heavy metal ion of production water is set to be reduced to below 1mg/L, electrical conductivity is less than 50us/cm, water for cleaning standard is fully achieved,
As washings direct reuse；
6) concentrated water of two-pass reverse osmosis film returns to first-stage reverse osmosis membranous system concentration；
7) electroplating rinse water after concentration is handled using efficient photoelectricity treater catalytic unit, electroplating rinse water pH value is adjusted to
4-9, the organic matter in electroplating rinse water deposit in titanium dioxide anodic oxidation, heavy metal in cathodic reduction；
The first-stage reverse osmosis film is polyamide reverse osmose membrane；
The two-pass reverse osmosis film is nanometer silicon carbide complex reverse osmosis membrane；The preparation of the nanometer silicon carbide complex reverse osmosis membrane
Method is：Nanometer silicon carbide particle is pressed into (0.001-0.01):The weight ratio of (3-10) is added in nitric acid diethyl ammonium solution,
The nanometer silicon carbide even particulate dispersion is set to be immersed in nitric acid diethyl ammonium solution, then by porous support membrane in solution,
It is heat-treated, that is, obtains nanometer silicon carbide complex reverse osmosis membrane.
2. a kind of electroplating rinse water circulating and recovering according to claim 1 and heavy metal recovery technique, it is characterised in that electricity
Washings are plated before by the security filtration system, first pass through categorised collection, are easy to reclaim the single heavy metal of high-purity.
3. a kind of electroplating rinse water circulating and recovering according to claim 1 and heavy metal recovery technique, it is characterised in that step
It is rapid 7) described in efficient photoelectricity treater catalytic unit from titanium dioxide be optoelectronic pole.
4. a kind of electroplating rinse water circulating and recovering according to claim 1 and heavy metal recovery technique, it is characterised in that step
It is rapid 7) described in efficient photoelectricity treater catalytic unit from ultraviolet light be light source.
5. a kind of electroplating rinse water circulating and recovering according to claim 1 and heavy metal recovery technique, it is characterised in that step
The membrane module of rapid 3) described NF membrane is rolled membrane module or tubular membrane component, and its condition of work is 15~40 DEG C, operating pressure
For 4~10bar.
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| CN106929683B (en) * | 2017-04-07 | 2018-07-20 | 环境保护部华南环境科学研究所 | The online resource retracting device of thallium in a kind of smelting mine furnace gas |
| CN107670509B (en) * | 2017-11-08 | 2020-07-28 | 许锦璐 | Household reverse osmosis water purifier with cleaning function and integrated secondary reverse osmosis and method |
| CN112028347A (en) * | 2019-06-04 | 2020-12-04 | 核工业理化工程研究院 | Zero-discharge treatment system and treatment method for chemical nickel plating wastewater |
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| RU2088537C1 (en) * | 1993-11-04 | 1997-08-27 | Акционерное общество открытого типа завод "Красное знамя" | Method of recuperation reverse-osmosis purification of waste water to remove heavy metal ions |
| CN101481157A (en) * | 2008-01-17 | 2009-07-15 | 刘寅 | Process for advanced treatment of electroplating waste by integrated membrane |
| CN102020385A (en) * | 2010-11-29 | 2011-04-20 | 广州凯膜过滤设备有限公司 | Method for treating electroplate rinsing wastewater |
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| RU2088537C1 (en) * | 1993-11-04 | 1997-08-27 | Акционерное общество открытого типа завод "Красное знамя" | Method of recuperation reverse-osmosis purification of waste water to remove heavy metal ions |
| CN101481157A (en) * | 2008-01-17 | 2009-07-15 | 刘寅 | Process for advanced treatment of electroplating waste by integrated membrane |
| CN102020385A (en) * | 2010-11-29 | 2011-04-20 | 广州凯膜过滤设备有限公司 | Method for treating electroplate rinsing wastewater |
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