CN201610402U - Recycling and deep treatment device for electronic electroplating wastewater - Google Patents
Recycling and deep treatment device for electronic electroplating wastewater Download PDFInfo
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- CN201610402U CN201610402U CN2009202827314U CN200920282731U CN201610402U CN 201610402 U CN201610402 U CN 201610402U CN 2009202827314 U CN2009202827314 U CN 2009202827314U CN 200920282731 U CN200920282731 U CN 200920282731U CN 201610402 U CN201610402 U CN 201610402U
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Abstract
A recycling and deep treatment device for electronic electroplating wastewater aims at treating deeply and recycling heavy metal cleaning wastewater generated in working procedures such as etching, microetching, electroplating and the like in the electronic electroplating industries, and takes the film combining process as a core. The device mainly comprises a coagulating sedimentation treatment unit, a microfilteration film treatment unit, a pre-treatment unit and a reverse osmosis treatment unit, which are connected in series; and the control system is formed by adopting automatic control system (PLC). The device obtains rescue water meeting the requirement of water for the production process by treatment, and realizes the purposes of recycling wastewater and reducing the emission of heavy metal.
Description
Technical field
The utility model relates to a kind of electronic electroplating wastewater recycling advanced treatment apparatus, is mainly used in to handle the heavy metal Cleaning Wastewater that the electronics electroplating industry produces, and belongs to the sewage disposal device field.
Background technology
China's water resources critical shortage, per capita 1/4 of the not enough world of fresh water owning amount per capita share, the people is many, and water is few, seriously is not complementary with productivity.Along with development of modern industry and mankind itself's active increase, the emission problem of a large amount of waste water is also more and more serious.
The industry that the electronics electroplating industry is high water consumption, blowdown flow rate is big, the industry that relates to comprises electronic information, precision optical machinery etc.Basic industry printed circuit board (PCB) with electronics industry is an example, to reach about 4.1 hundred million tons/year to its wastewater flow rate in 2010, and contain heavy metal ion and organic pollutants such as a large amount of copper, nickel in the waste water, this causes the wasting of resources on the one hand, big, the drinking water safety that influences the resident of seriously polluted, the hazardness of heavy metal persistence on the other hand, constitute the bottleneck of enterprise development, seriously restricted the development of electronics electroplating industry.The improvement of electronic electroplating wastewater is generally adopted chemical neutralization precipitation, electrolytic process, ion exchange method, membrane separation process etc. to carry out qualified discharge and is handled." the plating pollutant emission standard " formulated in 2008 (GB21900-2008), the strict more discharge index of heavy metal Cu, Ni etc. has increased the intractability of electronic electroplating wastewater.
Membrane separation technique is subjected to extensive concern in recent years and development is rapid, has obtained widespread use in fields such as oil, chemical industry, electronics, food and environmental protection.With the processing of application of membrane separation technology in trade effluent, the solution of " green " will be provided for Industrial Wastewater Treatment, at present, the theoretical investigation of different levels and technological development, application have been carried out, studies show that, adopt membrane separation technique can realize effectively that waste water recycling, resource reclaim and material cycle utilization, environmental benefit and remarkable in economical benefits.
At present, most of enterprise will handle waste water up to standard and consider to be back to domestic water (flush the toilet or afforest) and the not tight production wash-down water of water quality requirement, and waste water recycling is few in the example of the production technique water of water quality requirement strictness, and the ratio of reuse is also lower.In the production process of electronics electroplating industry, operations such as etching, microetch, plating will produce a large amount of Cleaning Wastewater that contains heavy metal, this part Cleaning Wastewater water yield is bigger, contain a certain amount of organic pollutant, heavy metal contaminants is based on copper or nickel, be the part of cleaning in the whole waste water system, be suitable as the water source that is back to production process after the waste water advanced processing.
Summary of the invention
The utility model provides a kind of electronic electroplating wastewater recycling advanced treatment apparatus.
For achieving the above object, the technical solution adopted in the utility model is: a kind of electronic electroplating wastewater recycling advanced treatment apparatus, and described device is made of coagulating sedimentation processing unit, microfiltration membrane processing unit, pretreatment unit and reverse-osmosis treated units in series; Described coagulating sedimentation processing unit is made of the first pH regulator pond, coagulation basin and the series connection of the second pH regulator pond; Described microfiltration membrane processing unit by concentration basin, microfiltration membrane treatment unit, in and water tank and water storage tank series connection constitute; Described pretreatment unit is made of activated charcoal filter and the series connection of security personnel's strainer; Described reverse-osmosis treated unit comprises the reverse-osmosis treated device.
Related content in the technique scheme is explained as follows:
1, in the such scheme, at the electronic electroplating wastewater of following water-quality guideline:
(1) chemical oxygen demand (COD) is less than or equal to 200mg/l;
(2) content of other heavy metals such as copper and mickel all is less than or equal to 200mg/l;
(3) specific conductivity is less than or equal to 2500 μ s/cm.
2, the treatment unit of microfiltration membrane described in the such scheme is provided with the concentrate recirculation mouth, and this concentrate recirculation mouth is connected to concentration basin through a concentrate recirculation pipe.
3, in the such scheme, the dense water out of described reverse osmosis unit is communicated with a dense water tank, and the water outlet of reverse osmosis unit is communicated with a fresh-water tank.
4, in the such scheme, change system can adopt auto-control Design, utilizes PLC as the kernel control chip in the treatment process.Adopt the input and output configuration PLC of modular organization more flexibly, inverse amplification factor reaches more than 90% automatically, simplifies operation, and is easy to maintenance.
5, in the such scheme, the membrane sepn process is to be separating medium with the selective permeation film, by certain impellent (as pressure difference, concentration difference, potential difference etc.) of outside energy or the existence of film both sides, the feed side component optionally sees through film, thus the purpose that reaches separation, concentrates or purify.Membrane separation technique is low as a kind of energy consumption, equipment is simple, easy to operate and isolation technique that separation performance is good, has been subjected at present paying close attention to widely and develops rapidly.With the obvious processing effect of application of membrane separation technology in waste water recycling.Membrane sepn is divided into micro-filtration (MF), ultrafiltration (UF), nanofiltration (NF), dialysis (D), electrodialysis (ED), reverse osmosis (RO) etc. again by its purposes.
6, in the such scheme, microfiltration membrane can be used Duraflow (DF) film, the DF film is a kind of open tubular filter film, adopt organic inertia material to make, periosteum is tough, membrane pore size is distributed in micro-filtration and ultrafiltration lap, and filter opening is between 0.1 micron to 0.2 micron, and the cycle in work-ing life is grown (about more than 5 years).Operate in the cross-flow mode, aspect removal solid metal, TSS and COD, contain micro-filtration and ultrafiltration function, can remove fine particles and macromole.System operation pressure is low in addition, only needs 50PSi (0.35MPa).Again because it has surperficial pollution resistance, dirt can only residue in film inside pipe wall surface, filter opening inside in the tube wall does not then have dirt, be convenient to clean, and the cleaning amount is few, and the consumption time is few, needs the frequency of cleaning also very low, the life cycle total cost is lower than other general filtering membrane systems, tool economy and cost benefit in like product.Its pretreatment technology as industrial effluent reusing RO treatment system, alternative traditional settling tank, sandfiltration pot etc. reduce working cost; Adopt the operation of vast scale pump around circuit simultaneously, be beneficial to concentrating of heavy metal waste liquid, treatment effect is stable.
7, in the such scheme, RO (Reverse Osmosis) reverse osmosis technology utilizes the membrane sepn filtering technique of pressure difference for power, and its aperture is little of nano level (1 nanometer=10-9 rice).Strong solution one side apply an impressed pressure (1～10Mpa), when this pressure during, will force solvent in the strong solution to the dilute solution side flow greater than the osmotic pressure of solution, the flow direction of this solvent is opposite with the direction of original infiltration, this process is reverse osmosis.The reverse osmosis technology maturation, widespread use and sea water desaltination, pure water preparation, chemical separating, concentrate, field such as purification, in water treatment system, with Impurity removals such as the mineral ion in the former water, bacterium, virus, organism, colloids, obtain high-quality water with reverse osmosis technology.
8, in the such scheme, gac is the black porous particle of making through charing and reactivation process with plurality of raw materials such as bituminous coal, brown coal, shell or wood chips, it is a kind of sorbent material of drawing jointly by unformed charcoal and different amount ash contents, have very big specific surface area and pore texture, absorption property is good, can adsorb metal ion in waste water and the waste gas, obnoxious flavour, organic pollutant, pigment etc., the quality of adsorbent can approach the quality of gac itself.But regeneration of activated carbon efficient is low, and work-ing life is short, so at present active carbon adsorption of using is handled preceding a kind of preprocessing means as electronic electroplating wastewater recycling more.
9, in the such scheme, security personnel's strainers (cartridge filtration) refer to water and enter filter core inside from the outside of microstraining core (precision is generally less than 5 μ m), and trace suspension thing or fine impurities particulate matter are trapped within the filter core process external.Security personnel's strainer is the strainer that ensures reverse osmosis treatment system safety, and generalized case is placed on after quartz sand, gac, the resin etc., before the reverse osmosis membrane, further removes large granular impurity, satisfies the requirement of subsequent handling to water inlet.The filter core of security personnel's strainer mainly contains PP melt-blown filter and absorbent cotton wire-wound filter core, and filtering accuracy has 1 μ m, 5 μ m, 10 μ m, 50 μ m, 100 μ m usually.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
1, because microfiltration membrane (Duraflow film) treatment system that low-pressure membrane of the present utility model unit adopts, this film adopts polyethylene (PE) to add poly(vinylidene fluoride) (PVDF) material, filter opening can effectively be removed heavy metal, TSS and COD etc. between 0.1 micron to 0.2 micron.The micro-filtrate membrane filtration system can be concentrated into solids content with sewage and reach more than 5%.This film has surperficial pollution resistance, be convenient to clean, and the water for cleaning amount is few; Have erosion resistance, the cycle in work-ing life is longer; System operation is stable, saves the space, advantages such as convenient operating maintenance, the automatic control of PLC.
2, the utility model adopts the film combination process of " DF+RO ".The DF film processing system replaces traditional coagulation-settlement process, simplify technology, save floor space, investment and running cost, and treatment effect has been better than traditional technology, its stable water outlet can be good at satisfying the water inlet requirement of reverse osmosis, helps improving the reverse-osmosis treated effect.The DF membrane treatment process adopts the pump around circuit operation, is beneficial to concentrating of heavy metal waste liquid.The RO film processing system can effectively reduce the specific conductivity of water body, makes the water quality of reuse water can satisfy enterprise's production technique water requirement, has improved the rate of utilization of water greatly, has saved water resources.
3, the utility model is applicable to the wastewater treatment and the reuse of electronic devices and components manufacturing, electroplating industry, according to the actual treatment capacity that needs of waste water, also can singly overlap operation or overlap parallel running more, installs stable.
Description of drawings
Accompanying drawing 1 is the utility model synoptic diagram.
In the above accompanying drawing: 1, retention basin; 2, the first pH regulator pond; 3, coagulation basin; 4, the second pH regulator pond; 5, concentration basin; 6, microfiltration membrane treatment unit; 7, in and water tank; 8, water storage tank; 9, lift pump; 10, activated charcoal filter; 11, security personnel's strainer; 12, high-pressure pump; 13, reverse-osmosis treated device; 14, dense water tank; 15, fresh-water tank.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: a kind of electronic electroplating wastewater recycling advanced treatment apparatus
Shown in accompanying drawing 1, this device is made of coagulating sedimentation processing unit, microfiltration membrane processing unit, pretreatment unit and reverse-osmosis treated units in series; Described coagulating sedimentation processing unit is made of the first pH regulator pond 2, coagulation basin 3 and 4 series connection of the second pH regulator pond; Described microfiltration membrane processing unit by concentration basin 5, microfiltration membrane treatment unit 6, in and water tank 7 and water storage tank 8 series connection constitute; Described pretreatment unit is made of activated charcoal filter 10 and 11 series connection of security personnel's strainer; Described reverse-osmosis treated unit comprises reverse-osmosis treated device 13.Described microfiltration membrane treatment unit 6 is provided with the concentrate recirculation mouth, and this concentrate recirculation mouth is connected to concentration basin 5 through a concentrate recirculation pipe.The dense water out of described reverse osmosis unit is communicated with a dense water tank 14, and the water outlet of reverse osmosis unit is communicated with a fresh-water tank 15.
Embodiment two: a kind of electronic electroplating wastewater recycling advanced treatment apparatus
This device mainly utilizes multiple technologies combinations such as chemical coagulation, little worry, absorption and reverse osmosis, after process low pressure micro-filtration (DF) film unit carries out wastewater treatment, further carry out advanced treatment by reverse osmosis membrane, be met the reuse water of manufacturing technique requirent, rest part discharges meeting or be better than under the condition that GB 21900-2008 emission standard requires, heavy metal accumulation in mud for recycling.
Electronic electroplating wastewater advanced treatment and reclamation device is made of coagulating sedimentation processing unit, microfiltration membrane processing unit, pretreatment unit and reverse-osmosis treated units in series, Controlling System adopts automatic control system (PLC), and principal feature is the combination of " DF+RO " film processing system.The treatment scale of this device reaches 1000 ton per days.Coagulating sedimentation processing unit, microfiltration membrane processing unit, pretreatment unit and reverse-osmosis treated unit are connected in series successively by pipeline and constitute the waste water path, and are provided with water pump between each equipment.
1, coagulating sedimentation processing unit
The PH Adjustment System is made of the first pH regulator pond 2, coagulation basin 3 and 4 series connection of the second pH regulator pond, is connected in series successively by pipeline between them.At first Cleaning Wastewater is imported in the first pH regulator pond 2 by retention basin, add sodium hydroxide and regulate pH value to 9～10, and then with waste water pump to coagulation basin 3, add coagulating agent PAC or FeSO4 mixing stirring, the formation precipitation of hydroxide.Because after adding coagulating agent, the pH of waste water may descend, therefore, need the mixed solution in the coagulation basin is pumped into the second pH regulator pond 4, further regulate PH to 9～10, to reach best sedimentation effect.
2, microfiltration membrane processing unit
The material of Duraflow microfiltration membrane (being called for short the DF film) film is polyvinylidene chloride (PVDF), and the material of putamina is rigid polyvinyl chloride (PVC-U).DF film processing unit by concentration basin 5, microfiltration membrane treatment unit 6, in and water tank 7 and water storage tank 8 series connection constitute.The waste liquid input concentration basin of handling through the second pH regulator pond 45, in concentration basin 5, drop into powdered carbon, pump into microfiltration membrane treatment unit 6 by recycle pump after the mixing and stirring and carry out the membrane sepn processing, under action of pressure, operate in the cross-flow mode, during microfiltration membrane treatment unit 6 isolated clear water enter and water tank 7, concentrate recirculation advances concentration basin 5 and continues to enter microfiltration membrane treatment unit 6 separating treatment, in and add sulfuric acid in the water tank 7, regulate the pH value after 7～8, enter water storage tank 8.Sedimentary heavy metal sewage sludge is taken away to sludge thickener by sludge pump in the concentration basin 5, enters sludge treating system.The microfiltration membrane processing unit is furnished with washing unit, regularly carry out medicine and wash and the clear water back flushing, and the medicament that medicine is washed is acid, alkali or SYNTHETIC OPTICAL WHITNER (clorox), and Cleaning Wastewater enters waste water disposal facility.Be 5 years the work-ing life of low pressure micro-filtration (DF) film.
The effluent index of DF film processing unit: COD≤60mg/l, Cu, Ni≤0.1mg/l.
3, pretreatment unit
Pretreatment unit is made of activated charcoal filter 10 and 11 series connection of security personnel's strainer.
1) activated charcoal filter 10
Activated charcoal filter 10 is a porous character of utilizing gac, makes organism in the waste water, colloid, microorganism, stink etc. be attracted to solid surface and is removed.Waste water adopts lift pump 9 directly to pump into activated charcoal filter 10 from water storage tank 8 and handles, and activated charcoal filter 10 is furnished with rinse-system, and every day, operation was washed with clear water, and Cleaning Wastewater enters waste water disposal facility.Regeneration of activated carbon is difficulty relatively, when the effluent quality of gac can not meet the demands, then need change gac.
2) security personnel's strainer 11
Security personnel's strainer 11 is the strainers that ensure treatment system safety, generally is placed on after quartz sand, gac, the resin etc., before the reverse osmosis membrane, further removes the last barrier of large granular impurity.Pump into security personnel's strainer 11 through the water outlet of activated charcoal filter 10 and carry out adsorption treatment.This device adopts two-stage filtration, and one-level adopts the aperture of 10 μ m, and secondary adopts the aperture of 5 μ m.Security personnel's strainer 11 does not carry out back flushing, directly with after the flushing with clean water, uses the salt acid soak again after generally filter core being taken out, scavenging period is decided according to the filter core pollution condition, and too high when discharge pressure, water quality does not reach requirement, then need consider more renew cartridge, change once in general every month.
The effluent index of pretreatment unit: COD≤20mg/l, turbidity≤2.0NTU, SDI value≤5.0.
4, reverse-osmosis treated unit
Reverse osmosis membrane refers to the RO film, and the material of film is the aromatic polyamides matrix material, and putamina is fibre reinforced plastics (FRP) materials.Utilizing the RO film mainly is the specific conductivity of removing in the water, (1～10Mpa) is impellent with pressure difference, utilize the selection crown_interception of RO film that the water solvent in the waste water is separated with organism, colloid, bacterium and mineral ion etc., thereby preparation fresh water is realized the reuse of waste water.Waste water pumps into reverse-osmosis treated device 13 by high-pressure pump 12 through security personnel's strainer 11, and the fresh water after the RO film is handled enters fresh-water tank 15, and dense water then enters dense water tank 14, carries out wastewater to reach standard and handles.Be provided with the accurate filter of Φ 500 before the washing unit of RO film, adopt the filter core of 5 μ m that washing lotion is filtered.Clean and adopt citric acid and Sodium dodecylbenzene sulfonate alternately to wash, the front and back flushing with clean water, Cleaning Wastewater enters waste water disposal facility.Be 1 year the work-ing life of reverse osmosis (RO) film.
The main effluent index of RO film processing unit: specific conductivity is 50 μ s/cm.
5, device effluent quality
The device treatment scale reaches 1000 ton per days, and reclamation rate is greater than 60%.Device is handled the back effluent quality and is reached the requirement of electronic enterprise production technique water, and main water-quality guideline is as follows:
The pH value is 6～8;
Total hardness≤40mg/L (CaCO3 meter);
Total solids≤500mg/L;
Total copper≤0.05mg/L;
Specific conductivity≤50 μ S/cm (25 ℃).
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. electronic electroplating wastewater recycling advanced treatment apparatus, it is characterized in that: described device is made of coagulating sedimentation processing unit, microfiltration membrane processing unit, pretreatment unit and reverse-osmosis treated units in series; Described coagulating sedimentation processing unit is made of the first pH regulator pond, coagulation basin and the series connection of the second pH regulator pond; Described microfiltration membrane processing unit by concentration basin, microfiltration membrane treatment unit, in and water tank and water storage tank series connection constitute; Described pretreatment unit is made of activated charcoal filter and the series connection of security personnel's strainer; Described reverse-osmosis treated unit comprises the reverse-osmosis treated device.
2. electronic electroplating wastewater recycling advanced treatment apparatus according to claim 1 is characterized in that: described microfiltration membrane treatment unit is provided with the concentrate recirculation mouth, and this concentrate recirculation mouth is connected to concentration basin through a concentrate recirculation pipe.
3. electronic electroplating wastewater recycling advanced treatment apparatus according to claim 1 is characterized in that: the dense water out of described reverse osmosis unit is communicated with a dense water tank, and the water outlet of reverse osmosis unit is communicated with a fresh-water tank.
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| CN102336481A (en) * | 2011-06-03 | 2012-02-01 | 泉州市碧蓝环保科技有限公司 | Process for reclaiming copper and nickel from electroplating rinse waste water and implementing zero discharge of waste water |
| CN104150666A (en) * | 2014-06-09 | 2014-11-19 | 煤科集团杭州环保研究院有限公司 | High ammonia-nitrogen tail liquid zero-discharge treatment system and high ammonia-nitrogen tail liquid zero-discharge treatment method applied after alkaline etching waste liquid treatment |
| CN104229940A (en) * | 2014-09-23 | 2014-12-24 | 扬州佳境环境设备有限公司 | Copper and ammonia complexed waste water resource recovery and zero discharge membrane system and application thereof, and handling method for realizing copper and ammonia complexed waste water resource recovery and zero discharge |
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| CN102336481A (en) * | 2011-06-03 | 2012-02-01 | 泉州市碧蓝环保科技有限公司 | Process for reclaiming copper and nickel from electroplating rinse waste water and implementing zero discharge of waste water |
| CN104150666A (en) * | 2014-06-09 | 2014-11-19 | 煤科集团杭州环保研究院有限公司 | High ammonia-nitrogen tail liquid zero-discharge treatment system and high ammonia-nitrogen tail liquid zero-discharge treatment method applied after alkaline etching waste liquid treatment |
| CN104150666B (en) * | 2014-06-09 | 2015-09-02 | 煤科集团杭州环保研究院有限公司 | High ammonia nitrogen tail washings zero-discharge treatment system after a kind of alkaline etching waste liquid for producing process and method |
| CN104229940A (en) * | 2014-09-23 | 2014-12-24 | 扬州佳境环境设备有限公司 | Copper and ammonia complexed waste water resource recovery and zero discharge membrane system and application thereof, and handling method for realizing copper and ammonia complexed waste water resource recovery and zero discharge |
| CN105236624A (en) * | 2015-10-30 | 2016-01-13 | 南京德邦金属装备工程股份有限公司 | Recycling method for zinc-containing wastewater by membrane treatment |
| CN106517597A (en) * | 2016-12-23 | 2017-03-22 | 广东新大禹环境科技股份有限公司 | Electroplating nickel-containing wastewater treatment system |
| CN107055878A (en) * | 2017-06-02 | 2017-08-18 | 上海楚源环保科技有限公司 | Waste water recycling process and device |
| CN109650576A (en) * | 2019-02-26 | 2019-04-19 | 扬州佳境环境科技股份有限公司 | One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process |
| CN116002879A (en) * | 2021-10-19 | 2023-04-25 | 中国石油化工股份有限公司 | Method for treating heavy metal wastewater by using reverse osmosis membrane |
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