CN103708656A - Comprehensive recycling processing method of electroplating wastewater resources - Google Patents
Comprehensive recycling processing method of electroplating wastewater resources Download PDFInfo
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- CN103708656A CN103708656A CN201210379336.4A CN201210379336A CN103708656A CN 103708656 A CN103708656 A CN 103708656A CN 201210379336 A CN201210379336 A CN 201210379336A CN 103708656 A CN103708656 A CN 103708656A
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Abstract
The invention belongs to the technical field of environmental protection and water treatment, particularly the field of the recovery processing of the electroplating wastewater resources, and particularly relates to a comprehensive recycling processing method of the electroplating wastewater resources. The comprehensive recycling processing method comprises a raw water pre-treating and filtering device, a reverse osmosis pre-treating device, a concentration and nanofiltration device and a reverse osmosis purification device, wherein the raw water pre-treating and filtering device, the reverse osmosis pre-treating device, the concentration and nanofiltration device and the reverse osmosis purification device are in pipeline connection. The method comprises steps of subjecting the collected wastewater to pre-processing and filtering processing, pre-reverse osmosis pre-processing, processing by the reverse osmosis purification device and processing by the concentration and nanofiltration device so as to obtain purified water and a high-concentration concentrated solution. The purified water recycled from the reverse osmosis purification device can be directly returned back to the production line for recycling and reutilization, and the concentrated solution with high-concentration heavy metal components obtained from the concentration and nanofiltration device can be subjected to electrolysis and purification by an electrolytic device so as to obtain high-purity and costly precious metal, and therefore the comprehensive recycling of the metal plating wastewater resources is achieved to the utmost.
Description
Technical field
The invention belongs to environment-protective water processing technology field, especially electroplating wastewater resource comprehensive recycling technical field, is specifically related to a kind of electroplating wastewater resource comprehensive recovery and treatment method.
Background technology
Electroplating technology is at five metals processing, kitchen bathroom, and each every profession and trade such as wiring board manufacture has a wide range of applications.It can produce a large amount of processing wastewaters in process of production, and the principal pollutant in its waste water are some salt and acid of containing heavy metal (as copper, nickel etc.).
Processing mode according to traditional industries to electroplating wastewater for containing the higher processing wastewater (as changing cylinder tank liquor) of heavy metal components and concentration, need can directly be discharged after special environmental protection treatment; And for containing the lower electroplate rinsing wastewater of heavy metal components and concentration, be to be directly discharged into directly discharge after processing in environmental protection pond in factory.This processing mode had both increased environmental protection treatment pressure and expense, had wasted again a large amount of water and heavy metal resources simultaneously.
Summary of the invention
Thereby technical problem to be solved by this invention is to provide a kind of extraction and reclaims out high, the costly precious metal of purity and realized to greatest extent the electroplating wastewater resource comprehensive recovery and treatment method to the comprehensive recycling of electroplating wastewater resource.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electroplating wastewater resource comprehensive recovery and treatment method, comprise that the former water that mutual pipeline connects carries out pretreatment filtering device, pretreatment filtering device, reverse osmosis pre-treatment, concentrated device and the reverse osmosis purification devices received, and the treating method comprises following steps:
A. waste water enters raw water collection pond, unified pending after collecting;
B. the pre-treatment before the waste water of collecting being entered pretreatment filtering device and filtered;
C. enter reverse osmosis pretreatment device and carry out the pre-treatment of reverse osmosis, the pretreated liquid of reverse osmosis is divided into dense water and clear water after treatment;
When d. the pretreated liquid of reverse osmosis is after treatment for dense water, enter dense water collecting tank, then draw clear water and high density concentrated solution after entering concentrated nanofiltration device;
E. the clear water drawing in above-mentioned c and d step enters reverse osmosis purification devices again, after show that clean water recycles;
F. the high density concentrated solution drawing in above-mentioned d step enters electrolyzer and resolves into heavy metal and electrolysis waste solution;
G. the heavy metal recycle and reuse in above-mentioned f step, electrolysis waste solution is drained into the rear qualified discharge of processing in environmental protection pond.
In above-mentioned c step, clear water wherein produces water branch partly to be passed through after the reverse osmosis purification devices processing of rear class, and the pure water of institute's output will be sent back to production line and carry out recycling; Dense aquatic products water branch part be the concentrated nanofiltration device device by rear class carry out the degree of depth concentrated after, then the concentrated solution that contains high density heavy metal ion composition be drained into the extraction of carrying out heavy metal element in subordinate's electrolyzer device reclaim.
As the further optimization of technique scheme, described pretreatment filtering device includes former water increase pump, quartz filter and the biologic active carbon filtration device that mutual tube seat connects.
Described pretreatment filtering device is as follows to the technological process principle of former water treatment: former water enters activated charcoal filter after force (forcing) pump supercharging, its Main Function is to remove the suspended substance in water, small organic molecule and the part colloid of process coagulation, and granularity is greater than the mechanical impurity of 20 μ m; The effect of biologic active carbon filtration device is thereafter effectively to remove low molecule organic matter in water, residual ozone (O
3), also can reduce peculiar smell in water, colourity and stink.As the pretreating device of reverse osmosis unit, biological activity carbon filter can effectively prevent the Organic pollutants on reverse osmosis membrane surface, and is not subject to the impact of itself inflow temperature, pH value and organic mixture; Biological activated carbon can be adsorbed in a charcoal absorption biological degradation simultaneously part the degradable organism of activated carbon surface, nondegradable can going out by backwash.
As the further optimization of technique scheme, described reverse osmosis pretreatment device comprises interconnective nanofiltration security personnel filter, high-pressure pump and nanofiltration device.
As the further optimization of technique scheme, described concentrated nanofiltration device comprises high-pressure pump and concentrated nanofiltration membrane group device.
As the further optimization of technique scheme, described reverse osmosis purification devices comprises high-pressure pump and reverse osmosis membrane group device.
The ultimate principle that the inventive method adopts is, first by adopting, Using Multistage Membranes filters, concentrated purification processes device, the electroplating wastewater that contains heavy metal composition (as nickel, copper etc.) is carried out to deep purifying and concentrated purification processes, afterwards cleaning water up to standard after device is processed is returned to production line and carry out recycling; And by the dense water that contains high density heavy metal ion composition after device degree of depth concentration, by being drained in electrolysis special device device, carry out landfill recovery, thereby reach, electroplating wastewater resource is maximized to the object of recycling.
The beneficial effect main manifestations of a kind of electroplating wastewater resource comprehensive of the present invention recovery and treatment method is: the present invention is by using the concentrated purification techniques of high performance membrane in conjunction with electrolytic metal extractive technique, becomes pure water after can making most electroplating wastewaters by film device device filtration treatment and is able to reprocessing cycle and uses; Simultaneously by adopting electrolyzer device to extract recovery to the precious metal in Waste water concentrating liquid.Can make the discharge of wastewater in operation is zero substantially, greatly reduced the cost of sewage disposal, the cleaner production equipment that electroplating work procedure is become significantly reduce production costs, and can extract and reclaim out high, the costly precious metal of purity (as copper, nickel etc.), thereby realized to greatest extent the comprehensive recycling to electroplating wastewater resource.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of electroplating wastewater resource comprehensive of the present invention recovery and treatment method.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the invention is described:
As shown in Figure 1, preferred forms as a kind of electroplating wastewater resource comprehensive of the present invention recovery and treatment method, it former water that comprises that mutual pipeline connects carries out pretreatment filtering device, reverse osmosis pre-treatment, concentrated device and the reverse osmosis purification devices received, and the treating method comprises following steps:
A. waste water enters raw water collection pond, unified pending after collecting;
B. the pre-treatment before the waste water of collecting being entered pretreatment filtering device and filtered;
C. enter reverse osmosis pretreatment device and carry out the pre-treatment of reverse osmosis, the pretreated liquid of reverse osmosis is divided into dense water and clear water after treatment;
When d. the pretreated liquid of reverse osmosis is after treatment for dense water, enter dense water collecting tank, then draw clear water and high density concentrated solution after entering concentrated nanofiltration device;
E. the clear water drawing in above-mentioned c and d step enters reverse osmosis purification devices again, after show that clean water recycles;
F. the high density concentrated solution drawing in above-mentioned d step enters electrolyzer and resolves into heavy metal and electrolysis waste solution;
G. the heavy metal recycle and reuse in above-mentioned f step, electrolysis waste solution is drained into the rear qualified discharge of processing in environmental protection pond.
When the present invention specifically implements at a kind of electroplating wastewater resource comprehensive recovery and treatment method, comprise following implementation process:
The first step, first adopts traditional chemicals dosing plant device to automatically adjust to the potential of hydrogen of electroplating wastewater (pH value), and pending waste water potential of hydrogen horizontal adjustment is arrived in PH:6-7 scope.To regulate the waste water after processing to be sent in former water water collecting basin (or header tank) afterwards.
Second step, carries out pre-treatment to former water and filters processing.In this partial devices device, mainly by following three parts, formed: by structural order, be former water topping-up pump, quartz filter and biologic active carbon filtration device successively.This device is as follows to the technological process principle of former water treatment: former water enters activated charcoal filter after force (forcing) pump supercharging, its Main Function is to remove the suspended substance in water, small organic molecule and the part colloid of process coagulation, and granularity is greater than the mechanical impurity of 20 μ m; The effect of biologic active carbon filtration device is thereafter effectively to remove low molecule organic matter in water, residual ozone (O
3), also can reduce peculiar smell in water, colourity and stink.As the pretreating device of reverse osmosis unit, biological activity carbon filter can effectively prevent the Organic pollutants on reverse osmosis membrane surface, and is not subject to the impact of itself inflow temperature, pH value and organic mixture; Biological activated carbon can be adsorbed in a charcoal absorption biological degradation simultaneously part the degradable organism of activated carbon surface, nondegradable can going out by backwash.
The 3rd step, reverse osmosis pretreatment device: because raw water quality is comparatively severe, in order to guarantee the security of nanofiltration device operation and the life-span of nanofiltration membrane, a whole set of nanofiltration pretreatment unit is comprised of ensure public security filter, high-pressure pump and nanofiltration device three parts of nanofiltration.Now be described below:
(1) nanofiltration security personnel filter
Object is set: in order to prevent trickle graininess impurity blocking channel and to affect the water outlet water yield of nanofiltration, the filtering accuracy of nanofiltration security personnel filter is preferably selected below 5 μ m.
Installation composition: 1, cover cartridge filter; 2, high-pressure pump.
Object is set: pre-treatment is produced to water and send into nanofiltration treatment unit.
Installation composition: 1 high-pressure hydraulic pump.
Technical requirements:
● water pump is imported and exported and is provided with manual valve, outlet is provided with vacuum breaker.
● pump variable frequency is controlled.
(2) nanofiltration device
Object is set: the clear water of institute's output can fully guarantee the influent quality requirement of rear class reverse osmosis unit after nanofiltration pre-treatment.Nanofiltration membrane is selected polyethersulfone/polysulfone membrane, and this film can operate in pH (2～12) scope widely, and resistance to oxidation.Nanofiltration adopts grossflow filtration, uses inner pressed filtering membrane, avoids dirt to pile up between film silk; Adopt in addition inner pressed, the dirt that tunicle is held back easily removes by backwash or matting.
Installation composition: 1 cover nanofiltration device.
Technical requirements:
● the design flux of nanofiltration membrane element is followed the design flux of membrane element manufacturer regulation, fully guarantees work-ing life.
● every cover nanofiltration product water pipe is established sampling spot, and the quantity of sampling spot and position can efficient diagnosis determining device defects.
● nanofiltration membrane component is arranged on combined bay, is equipped with whole pipelines and joint on combined bay, comprises all supports, fastening piece, fixture and other annex.
● nanofiltration is produced water and is realized constant current control.
● the design of nanofiltration combined bay meets the requirement that makes the antidetonation earthquake intensity of land used want summation component expansion.
The 4th step, from then on step starts to deepen respectively processing by the dense water of prime pretreatment unit institute output and clear water are separated to two-way device.Clear water wherein produces water branch partly to be passed through after the reverse osmosis purification devices processing of rear class, and the pure water of institute's output will be sent back to production line and carry out recycling; Dense aquatic products water branch part be the concentrated nanofiltration device device by rear class carry out the degree of depth concentrated after, then the concentrated solution that contains high density heavy metal ion composition be drained into the extraction of carrying out heavy metal element in subordinate's electrolyzer device reclaim.
Functional configuration and the process treatment process of this two-way branch process device will be introduced respectively below.The after-treatment device of paper clear water component---reverse osmosis treater:
Reverse osmosis (RO) is a kind of function by means of selecting to see through (half sees through) property film, the membrane separation technique that the pressure difference of take is impellent, when in device, added pressure is greater than solution osmotic pressure, water molecules constantly sees through film, through producing water flow passage, flows into pipe core, then in water side, flows out, impurity in water inlet, as: ion, organism, bacterium, virus etc. are trapped within the influent side of film, then in dense water water side, flow out, thereby reach, former water desalination are purified to object.Product water after reverse osmosis unit is processed can meet reuse DI water water quality requirement completely.A whole set of reverse osmosis purification devices is mainly comprised of reverse osmosis booster pump (high-pressure pump) and reverse osmosis membrane group device two portions, is now described below:
1. high-pressure pump
Object is set: according to the characteristic of reverse osmosis itself, need have certain impellent to remove to overcome the resistances such as osmotic pressure, guarantee reaches the water production rate of design.High-pressure pump provides enough amount of inlet water and intake pressures for reverse osmosis membrane group device.
Installation composition: 1 cover high-pressure hydraulic pump.
Technical requirements:
● it is stainless steel that high-pressure pump is crossed water material.
● high-pressure pump is provided with manual valve, outlet is provided with vacuum breaker.
● pressure switch is established in high-pressure pump import, the low alarm of intake pressure and termination of pumping.
2. reverse osmosis membrane group device
Object is set: reverse osmosis membrane group is the core of whole reverse osmosis purification devices, its major function is to remove the impurity components such as solubility salinity in water, colloid, organism, thereby makes the clean water of device institute output meet the water quality requirement of reuse water.
Installation composition: reverse osmosis membrane assembly is selected anti-pollution reverse osmosis membrane, anti-organism, colloid decay.Through reverse osmosis special software, calculate, preferred plan is that reverse osmosis membrane group adopts one section of arrangement of one-level.
Technical requirements:
● the design flux of reverse osmosis (RO) membrane element is not more than the flux peak value of the < < of membrane element manufacturer guide rule > > regulation.
● every pressurized vessel and total product water pipe are established sampling spot, and the quantity of sampling spot and position can efficient diagnosis determining device defects.
● reverse osmosis membrane assembly is arranged on combined bay, is equipped with whole pipelines and joint on combined bay, comprises all supports, fastening piece, fixture and other annex.
● reverse osmosis produced water side arranges high voltage protective switch, protection reverse-osmosis membrane element.
● the design of reverse osmosis combined bay meets the requirement that makes the antidetonation earthquake intensity of land used want summation component expansion.
So far after electroplating wastewater is processed by aforementioned a series of devices, the clean water of final institute output is drained into buffering in the reuse water tank of rear class and stores, then through follow-up reuse water circulating pipeline device, is fed to production line and carries out recirculation use.And for the dense water for the treatment of unit institute output, the circulation line by device device inside turns back to raw water collection pond, after mixing with waste water stoste, carry out recycling processing.
Introduce the after-treatment device------of dense water branch part-concentrated nanofiltration device and electrolyzer device below:
The dense water branch that comes from prime reverse osmosis pretreatment device institute output, to first be drained into buffering in dense water collecting tank stores, afterwards through the concentrated nanofiltration device of rear class carry out the degree of depth concentrated after, then the concentrated solution that contains high density heavy metal ion composition be drained into the extraction of carrying out heavy metal element in subordinate's electrolyzer device reclaim.A whole set of concentrated nanofiltration device is mainly comprised of high-pressure pump and concentrated nanofiltration membrane group device two portions, is now described below:
(1) high-pressure pump
Object is set: the dense water in dense water water collecting basin is sent into concentrated nanofiltration membrane group device by pressurization and carry out degree of depth concentration.
Installation composition: 1 high-pressure hydraulic pump.
Technical requirements:
● water pump is imported and exported and is provided with manual valve, outlet is provided with vacuum breaker.
● pump variable frequency is controlled.
(2) concentrated nanofiltration membrane group device
Object is set: by the dense water that front stage arrangement is imported, undertaken that the selectivity degree of depth is concentrated purifies, what make heavy metal ion in the high-concentration waste water of output reaches the degree that can facilitate rear class electrowinning containing metric density.Nanofiltration membrane selects special-purpose antipollution selectivity to concentrate filter membrane, and nanofiltration adopts grossflow filtration, uses inner pressed filtering membrane; Adopt inner pressed, the dirt that tunicle is held back is easily got rid of by backwash or matting.
Installation composition: the concentrated nanofiltration membrane group device of 1 cover.
Technical requirements:
● the design flux of nanofiltration membrane element is followed the design flux of membrane element manufacturer regulation, fully guarantees work-ing life.
● every cover nanofiltration product water pipe is established sampling spot, and the quantity of sampling spot and position can efficient diagnosis determining device defects.
● nanofiltration membrane component is arranged on combined bay, is equipped with whole pipelines and joint on combined bay, comprises all supports, fastening piece, fixture and other annex.
● nanofiltration is produced water and is realized constant current control.
● the design of nanofiltration combined bay meets the requirement that makes the antidetonation earthquake intensity of land used want summation component expansion.
Electrolyzer device is connected to the rear class of the high density concentrated solution output mouth of concentrated nanofiltration device, it is identical that copper device device is carried in its device building up principle and effect electrolysis general with common electrolysis industry, and its Main Function is that the heavy metal composition in the high density concentrated solution that prime is entered extracts and recycles; The electrolysis waste solution that produces of device is by being drained in environment-protection wastewater treating pond thus, after treatment qualified discharge.
By reference to the accompanying drawings the preferred embodiment for the present invention is explained in detail above, but the invention is not restricted to above-mentioned embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from aim of the present invention, make a variety of changes.
Do not depart from the spirit and scope of the present invention and can make many other changes and remodeling.Should be appreciated that and the invention is not restricted to specific embodiment, scope of the present invention is defined by the following claims.
Claims (5)
1. an electroplating wastewater resource comprehensive recovery and treatment method, is characterized in that, comprises that the former water that mutual pipeline connects carries out pretreatment filtering device, reverse osmosis pre-treatment, concentrated nanofiltration device and reverse osmosis purification devices, the treating method comprises following steps:
Waste water enters raw water collection pond, unified pending after collecting;
Pre-treatment before the waste water of collecting is entered pretreatment filtering device and filtered;
Enter reverse osmosis pretreatment device and carry out the pre-treatment of reverse osmosis, the pretreated liquid of reverse osmosis is divided into dense water and clear water after treatment;
The pretreated liquid of reverse osmosis enters dense water collecting tank while being dense water after treatment, then draws clear water and high density concentrated solution after entering concentrated nanofiltration device;
The clear water drawing in above-mentioned c and d step enters reverse osmosis purification devices again, after show that clean water recycles;
The high density concentrated solution drawing in above-mentioned d step enters electrolyzer and resolves into heavy metal and electrolysis waste solution;
Heavy metal recycle and reuse in above-mentioned f step, electrolysis waste solution is drained into the rear qualified discharge of processing in environmental protection pond.
2. a kind of electroplating wastewater resource comprehensive recovery and treatment method according to claim 1, is characterized in that, described pretreatment filtering device includes former water topping-up pump, quartz filter and the biologic active carbon filtration device that mutual tube seat connects.
3. a kind of electroplating wastewater resource comprehensive recovery and treatment method according to claim 1, is characterized in that, described reverse osmosis pretreatment device comprises interconnective nanofiltration security personnel filter, high-pressure pump and nanofiltration device.
4. a kind of electroplating wastewater resource comprehensive recovery and treatment method according to claim 1, is characterized in that, described concentrated nanofiltration device comprises high-pressure pump and concentrated nanofiltration membrane group device.
5. a kind of electroplating wastewater resource comprehensive recovery and treatment method according to claim 1, is characterized in that, described reverse osmosis purification devices comprises high-pressure pump and reverse osmosis membrane group device.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773887A (en) * | 2015-04-23 | 2015-07-15 | 南京霖厚环保科技有限公司 | Process and device for recovering electrolytic copper from copper-containing wastewater |
| CN106145457A (en) * | 2015-03-27 | 2016-11-23 | 苏州卓融水处理科技有限公司 | A kind of waste water resource recycles processing method entirely |
| CN106219830A (en) * | 2016-06-01 | 2016-12-14 | 东莞汇金环境科技有限公司 | A kind of electroplated heavy metals wastewater zero discharge system and method |
| CN108396155A (en) * | 2018-03-05 | 2018-08-14 | 云南驰宏锌锗股份有限公司 | A kind of process of Zinc electrolysis electrolysis waste solution purification production high quality zinc |
| CN111018203A (en) * | 2019-12-27 | 2020-04-17 | 肇庆学院 | Nickel-containing heavy metal wastewater resource recovery device |
| CN111533354A (en) * | 2020-05-12 | 2020-08-14 | 广德华东电子电路发展有限公司 | Recovery process for electroplating wastewater |
| CN112080763A (en) * | 2019-06-12 | 2020-12-15 | 昆山卫司特环保设备有限公司 | Electrolytic recovery device for copper-containing waste liquid of printed circuit board |
| CN117303474A (en) * | 2023-10-07 | 2023-12-29 | 无锡善境环保设备有限公司 | Process for recycling water and nonferrous metal main salt solution and extracting nonferrous metal in water washing tank |
Citations (1)
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| CN101875520A (en) * | 2010-08-10 | 2010-11-03 | 南京师范大学 | Processing method of electroplating wastewater containing cyanogens and chrome |
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2012
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875520A (en) * | 2010-08-10 | 2010-11-03 | 南京师范大学 | Processing method of electroplating wastewater containing cyanogens and chrome |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145457A (en) * | 2015-03-27 | 2016-11-23 | 苏州卓融水处理科技有限公司 | A kind of waste water resource recycles processing method entirely |
| CN104773887A (en) * | 2015-04-23 | 2015-07-15 | 南京霖厚环保科技有限公司 | Process and device for recovering electrolytic copper from copper-containing wastewater |
| CN106219830A (en) * | 2016-06-01 | 2016-12-14 | 东莞汇金环境科技有限公司 | A kind of electroplated heavy metals wastewater zero discharge system and method |
| CN108396155A (en) * | 2018-03-05 | 2018-08-14 | 云南驰宏锌锗股份有限公司 | A kind of process of Zinc electrolysis electrolysis waste solution purification production high quality zinc |
| CN112080763A (en) * | 2019-06-12 | 2020-12-15 | 昆山卫司特环保设备有限公司 | Electrolytic recovery device for copper-containing waste liquid of printed circuit board |
| CN111018203A (en) * | 2019-12-27 | 2020-04-17 | 肇庆学院 | Nickel-containing heavy metal wastewater resource recovery device |
| CN111018203B (en) * | 2019-12-27 | 2022-02-01 | 肇庆学院 | Nickel-containing heavy metal wastewater resource recovery device |
| CN111533354A (en) * | 2020-05-12 | 2020-08-14 | 广德华东电子电路发展有限公司 | Recovery process for electroplating wastewater |
| CN117303474A (en) * | 2023-10-07 | 2023-12-29 | 无锡善境环保设备有限公司 | Process for recycling water and nonferrous metal main salt solution and extracting nonferrous metal in water washing tank |
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