CN218491603U - Electroplating cleaning wastewater's resource recovery unit - Google Patents
Electroplating cleaning wastewater's resource recovery unit Download PDFInfo
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- CN218491603U CN218491603U CN202222883611.8U CN202222883611U CN218491603U CN 218491603 U CN218491603 U CN 218491603U CN 202222883611 U CN202222883611 U CN 202222883611U CN 218491603 U CN218491603 U CN 218491603U
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The utility model provides a resource recovery unit of electroplating cleaning waste water, recovery unit is including the medium filter, precision filter, ion exchanger and the reverse osmosis equipment that connect gradually, the dense water export of reverse osmosis equipment links to each other with medium filter's entry. The recovery device of the utility model removes impurities in the electroplating cleaning wastewater through the sequential arrangement of equipment such as multi-stage filtration, ion exchange and reverse osmosis, reaches the recycling standard, fully recovers valuable metal ions, and effectively realizes the resource utilization of the electroplating cleaning wastewater; the recovery device has the advantages of simple structure, low energy consumption of equipment and process, high treatment efficiency and no secondary pollution.
Description
Technical Field
The utility model belongs to the technical field of waste liquid treatment and recovery, a electroplating cleaning wastewater's resource recovery unit is related to.
Background
The electroplating product is a product which is frequently used in industry and daily life, can be widely applied to a plurality of industries, has large water consumption in the electroplating industry, can generate different electroplating wastewater in different application fields, and has different characteristic properties. Among various electroplating waste liquids with different properties, the electroplating cleaning waste water is a main component of the electroplating waste water, although the electroplating cleaning waste water has low heavy metal content, the waste water has large quantity, and the electroplating cleaning waste water also needs to be treated and is discharged or recycled after reaching the standard. The copper and nickel electroplating process is a process with large waste water generation amount in the electroplating industry, and even if the process is treated, the process is not suitable for direct discharge, otherwise, a large amount of water resources are wasted, and therefore, the resource utilization of the waste water is required to be realized.
The main treatment method of the traditional electroplating cleaning wastewater is to mix the electroplating cleaning wastewater with wastewater generated in each link of an electroplating process and site cleaning wastewater, realize the recovery of resources by a physicochemical method, generate a large amount of precipitates in the process, and easily cause the problems of substandard wastewater treatment and large fluctuation of effluent quality if metal ions are in a complex state; in addition, a small amount of metal ions can enter an ecological system and can seriously affect the ecological system through biological accumulation and enrichment, so that a treatment method or process which can realize the recycling of the cleaning wastewater and zero discharge is sought, and has important significance for the recycling of the electroplating cleaning wastewater.
CN 104944709A discloses a method and a system for zero discharge of electroplating wastewater, the method comprises the following steps: pumping cleaning water into a chemical reaction tank, precipitating heavy metal ions by a chemical precipitation method, pumping high-concentration wastewater containing precipitates into low-temperature evaporation equipment to obtain solid metal salt, and pumping supernatant of a chemical precipitation tank into an adjusting tank; the wastewater in the regulating reservoir flows into an external membrane bioreactor and a tubular microfiltration membrane system for solid-liquid separation, and the product water enters a clear water tank; a high-pressure pump of the reverse osmosis membrane separation system absorbs water from a clear water tank, produced water enters a reuse water tank, and concentrated water of the reverse osmosis membrane separation system enters a reverse osmosis circulating concentration system; evaporating and purifying heavy metals, recovering heavy metal salt, and refluxing distilled water into an adjusting tank; the method integrates a chemical precipitation technology, an external membrane biological reaction system, a reverse osmosis membrane separation and concentration technology, a low-temperature evaporation separation technology and the like, and has the advantages of complex process operation, long hydraulic retention time of the membrane biological reaction system, low treatment efficiency of the evaporation separation technology and high energy consumption.
CN 105399246A discloses a direct recycling system and method for electroplating cleaning wastewater, the system mainly comprises a raw water pool, a raw water pump, a first regulating pool, a comprehensive reaction pool, a suction pump, a second regulating pool and an electroplating cleaning water recycling pool, an immersed membrane component for filtering electroplating cleaning wastewater is arranged at the upper part of the comprehensive reaction pool, and an inverted V-shaped inclined plate is connected below the immersed membrane component; the lower part of the comprehensive reaction tank is provided with a water distributor; the system treats the cleaning wastewater through chemical precipitation and filtration technologies, the requirement of cleaning a plated part is difficult to achieve only through one-step immersed membrane filtration, and the system can only be used as reclaimed water for recycling and cannot be applied to production lines.
In summary, for recycling the electroplating cleaning wastewater, a proper equipment combination and a proper sequence thereof need to be selected according to the composition of the cleaning wastewater, so that the electroplating cleaning wastewater can be recycled fully, the cost can be reduced, and the process can be simplified.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model aims to provide an electroplate resource recovery unit of washing waste water, recovery unit passes through setting gradually of equipment such as multistage filtration, ion exchange and reverse osmosis, gets rid of the impurity in the washing waste water of electroplating to fully retrieve valuable metal ion, effectively realize electroplating washing waste water's resource utilization, do not have the secondary waste liquid simultaneously and discharge, no solid waste produces, and processing cost is lower.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a resource recovery unit of electroplating cleaning waste water, recovery unit is including the medium filter, precision filter, ion exchanger and the reverse osmosis equipment that connect gradually, the dense water export of reverse osmosis equipment links to each other with medium filter's entry.
In the utility model, the electroplating cleaning wastewater is an important one of the electroplating wastewater, the wastewater amount is larger, according to the common composition of the electroplating cleaning wastewater, the utility model firstly adopts a medium filter to remove the particulate matters in the wastewater, then removes the micro-particulate matters in the cleaning wastewater and carried by the medium filter through a precise filter, then adsorbs and removes the metal ions in the cleaning wastewater through ion exchange, and finally removes the micro-molecular matters through reverse osmosis, so that the treated wastewater reaches the recycling standard; through the combination of the equipment and the corresponding unit operation, impurities in the electroplating cleaning wastewater can be removed to reach the recycling standard, and valuable metal ions are fully recycled, so that the resource utilization of the electroplating cleaning wastewater is realized; the recovery device has the advantages of simple structure, low energy consumption of equipment and process, high treatment efficiency and no secondary pollution.
Following conduct the utility model discloses preferred technical scheme, nevertheless do not conduct the utility model provides a technical scheme's restriction, through following technical scheme, can reach and realize better the utility model discloses a technical purpose and beneficial effect.
As the utility model discloses preferred technical scheme, recovery unit still includes the waste water collection tank, the export of waste water collection tank links to each other with media filter's entry, reverse osmosis equipment's dense water export links to each other with the entry of waste water collection tank.
As the preferred technical scheme of the utility model, the medium filter includes sand filter and charcoal filter in proper order, the export of sand filter links to each other with the entry of charcoal filter.
The media filled in the sand filter comprise quartz sand, and the media filled in the carbon filter comprise activated carbon particles.
In a preferred embodiment of the present invention, the quartz sand has a particle size of 1 to 7mm, for example, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm or 7mm, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range of values are also applicable; the particle diameter of the activated carbon particles is 3 to 5mm, for example, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
The utility model discloses in, media filter mainly adopts the medium granule to get rid of the impurity in the electroplating washing waste water, specifically selects sand filter and charcoal filter, and sand filter selects the combination of the quartz sand of different particle diameters, and the quartz sand granule of selecting at present mainly comprises 1 ~ 3mm, 3 ~ 5mm and 5 ~ 7 mm's three kinds of particle diameter combination, mainly adopts the coconut shell active carbon granule of particle diameter 3 ~ 5mm in the charcoal filter, wherein the particulate matter in the waste water is mainly got rid of to the sand filter, and the middle and small molecule material in the waste water is mainly got rid of to the charcoal filter.
As the utility model discloses preferred technical scheme, be equipped with the filtration filter core among the precision filter, the filtration filter core includes the polypropylene filter core, mainly selects acid-proof type filter core.
The pore size of the filter element is 0.2 to 0.5. Mu.m, for example 0.22. Mu.m, 0.25. Mu.m, 0.3. Mu.m, 0.35. Mu.m, 0.4. Mu.m, 0.45. Mu.m or 0.5. Mu.m, but is not limited to the values listed, and other values not listed in this range of values are equally applicable.
In the utility model, the precision filter is also called as a safety filter, the filtering effect is mainly measured by the filtering precision, and the precision of the precision filter which is frequently adopted at present is 0.22 μm or 0.45 μm; the precision filter is used for removing wastewater and micro-particulate matters carried in the medium filter and has a certain protection effect on subsequent ion exchange resin.
As the preferable technical proposal of the utility model, the ion exchanger is filled with ion exchange resin which is cation exchange resin.
The utility model discloses in, based on electroplating cleaning wastewater's constitution, the ion of treating the recovery is mainly metal cation, like copper ion, nickel ion, therefore ion exchange resin's selection is mainly based on the pH valve of getting rid of target ion and solution for selected resin accords with the application condition.
As the utility model discloses preferred technical scheme, recovery unit still includes regenerant holding vessel and regenerant holding vessel, the export of regenerant holding vessel links to each other with ion exchanger's regenerant entry, ion exchanger's regenerant export links to each other with the entry of regenerant holding vessel.
The utility model discloses in, ion exchange resin uses after a period, need regenerate because of adsorbing saturation, selects acid or alkali to regenerate usually, selects different regenerants according to ion exchange resin's kind, gets off the desorption of metal ion and gets into the regenerant, realizes metal ion's resource utilization.
In a preferred embodiment of the present invention, the reverse osmosis apparatus is provided with a reverse osmosis membrane having a pore diameter of 0.1 to 0.7nm, for example, 0.1nm, 0.2nm, 0.3nm, 0.5nm, or 0.7nm, but the reverse osmosis membrane is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
The utility model discloses in, reverse osmosis membrane mainly is in order to further hold back the micromolecule material in the waste water, makes waste water reach the retrieval and utilization standard, and the dense water after reverse osmosis also can flow back and handle once more.
As the preferred technical scheme of the utility model, recovery unit still includes the retrieval and utilization jar, reverse osmosis unit's fresh water export links to each other with the entry of retrieval and utilization jar.
As the preferred technical scheme of the utility model, the export of retrieval and utilization jar links to each other with media filter's washing water inlet, media filter's washing water outlet links to each other with the entry of waste water collection tank.
In the utility model, the water in the recycling tank can be reused in the production process, and simultaneously, because the carbon filter and the sand filter in the recycling device have the service cycle, the water in the recycling tank can be just adopted by backwashing after being used for a period of time, and the backwashing water flows back to the waste water collecting tank for secondary treatment; in addition, the water in the recycling tank can also be used for backwashing the ion exchange resin, and mainly for flushing the regenerated ion exchange resin.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) The recovery device of the utility model removes impurities in the electroplating cleaning wastewater through the sequential arrangement of equipment such as multi-stage filtration, ion exchange and reverse osmosis, reaches the recycling standard, fully recovers valuable metal ions, and effectively realizes the resource utilization of the electroplating cleaning wastewater;
(2) Recovery unit simple structure, equipment and technology energy consumption are lower, and the treatment effeciency is high, can not cause secondary pollution.
Drawings
FIG. 1 is a schematic structural view of an electroplating cleaning wastewater resource recovery device provided in embodiment 1 of the present invention;
wherein, the method comprises the steps of 1-wastewater collection tank, 2-sand filter, 3-carbon filter, 4-precision filter, 5-ion exchanger, 6-reverse osmosis equipment, 7-regenerant storage tank, 8-regenerant collection tank and 9-recycling tank.
Detailed Description
To better explain the technical solution of the present invention, it is convenient to understand the technical solution of the present invention, and the following is further detailed description of the present invention, but the following embodiments are only simple examples of the present invention, and do not represent or limit the protection scope of the present invention, and the protection scope of the present invention is subject to the claims.
The utility model discloses embodiment mode part provides a resource recovery unit of electroplating washing waste water, recovery unit is including the medium filter, precision filter 4, ion exchanger 5 and the reverse osmosis equipment 6 that connect gradually, the dense water export of reverse osmosis equipment 6 links to each other with medium filter's entry.
The following are typical but non-limiting examples of the present invention:
example 1:
the embodiment provides a resource recycling device for electroplating cleaning wastewater, the structural schematic diagram of the recycling device is shown in fig. 1, and the recycling device comprises a medium filter, a precision filter 4, an ion exchanger 5 and a reverse osmosis device 6 which are connected in sequence, wherein a concentrated water outlet of the reverse osmosis device 6 is connected with an inlet of the medium filter.
The recovery device further comprises a wastewater collection tank 1, an outlet of the wastewater collection tank 1 is connected with an inlet of a medium filter, and a concentrated water outlet of the reverse osmosis equipment 6 is connected with an inlet of the wastewater collection tank 1.
The electroplating cleaning wastewater is electroplating copper cleaning wastewater.
The medium filter comprises a sand filter 2 and a carbon filter 3 in sequence, and an outlet of the sand filter 2 is connected with an inlet of the carbon filter 3.
The media filled in the sand filter 2 are quartz sand, and the media filled in the carbon filter 3 are activated carbon particles.
The quartz sand is a combination of three particles with the particle sizes of 1-2 mm, 3-4 mm and 5-6 mm; the particle size of the active carbon particles is 3-4 mm.
And a filtering filter element is arranged in the precision filter 4, and the filtering filter element is a polypropylene filter element.
The precision of the filter element is 0.22 μm.
The ion exchanger 5 is filled with ion exchange resin, and the ion exchange resin is cation exchange resin.
The recovery device further comprises a regenerant storage tank 7 and a regenerant collection tank 8, wherein an outlet of the regenerant storage tank 7 is connected with a regenerant inlet of the ion exchanger 5, and a regenerant outlet of the ion exchanger 5 is connected with an inlet of the regenerant collection tank 8; the regenerant is hydrochloric acid.
And a reverse osmosis membrane is arranged in the reverse osmosis equipment 6, and the aperture of the reverse osmosis membrane is 0.2nm.
The recovery device also comprises a recycling tank 9, and a fresh water outlet of the reverse osmosis device 6 is connected with an inlet of the recycling tank 9.
The outlet of the recycling tank 9 is connected with the washing water inlet of the medium filter, and the washing water outlet of the medium filter is connected with the inlet of the wastewater collection tank 1.
Example 2:
the embodiment provides a resource recovery device of electroplating cleaning waste water, recovery device is including the medium filter, precision filter 4, ion exchanger 5 and the reverse osmosis equipment 6 that connect gradually, the dense water export of reverse osmosis equipment 6 links to each other with medium filter's entry.
The recovery device further comprises a wastewater collection tank 1, an outlet of the wastewater collection tank 1 is connected with an inlet of a medium filter, and a concentrated water outlet of the reverse osmosis equipment 6 is connected with an inlet of the wastewater collection tank 1.
The electroplating cleaning wastewater is electroplating nickel cleaning wastewater.
The medium filter comprises a sand filter 2 and a carbon filter 3 in sequence, and an outlet of the sand filter 2 is connected with an inlet of the carbon filter 3.
The media filled in the sand filter 2 are quartz sand, and the media filled in the carbon filter 3 are activated carbon particles.
The quartz sand is a combination of three particles with the particle sizes of 2-3 mm, 4-5 mm and 6-7 mm; the particle size of the active carbon particles is 4-5 mm.
And a filtering filter element is arranged in the precision filter 4, and the filtering filter element is a polypropylene filter element.
The precision of the filter element is 0.45 mu m.
The ion exchanger 5 is filled with ion exchange resin, and the ion exchange resin is cation exchange resin.
The recovery device further comprises a regenerant storage tank 7 and a regenerant collection tank 8, an outlet of the regenerant storage tank 7 is connected with a regenerant inlet of the ion exchanger 5, a regenerant outlet of the ion exchanger 5 is connected with an inlet of the regenerant collection tank 8, and the regenerant is nitric acid.
And a reverse osmosis membrane is arranged in the reverse osmosis equipment 6, and the aperture of the reverse osmosis membrane is 0.7nm.
The recovery device also comprises a recycling tank 9, and a fresh water outlet of the reverse osmosis device 6 is connected with an inlet of the recycling tank 9.
The outlet of the recycling tank 9 is connected with the washing water inlet of the medium filter, and the washing water outlet of the medium filter is connected with the inlet of the wastewater collection tank 1.
Example 3:
the embodiment provides a resource recovery device of electroplating cleaning waste water, recovery device is including the medium filter, precision filter 4, ion exchanger 5 and the reverse osmosis equipment 6 that connect gradually, the dense water export of reverse osmosis equipment 6 links to each other with medium filter's entry.
The recovery device further comprises a wastewater collection tank 1, an outlet of the wastewater collection tank 1 is connected with an inlet of a medium filter, and a concentrated water outlet of the reverse osmosis equipment 6 is connected with an inlet of the wastewater collection tank 1.
The electroplating cleaning wastewater is electroplating copper cleaning wastewater.
The medium filter comprises a sand filter 2 and a carbon filter 3 in sequence, and an outlet of the sand filter 2 is connected with an inlet of the carbon filter 3.
The media filled in the sand filter 2 are quartz sand, and the media filled in the carbon filter 3 are activated carbon particles.
The quartz sand is a combination of two particles with the particle size of 3-4 mm and 5.5-6.5 mm; the particle size of the active carbon particles is 3.5-4.5 mm.
And a filtering filter element is arranged in the precision filter 4, and the filtering filter element is a polypropylene filter element.
The precision of the filter element is 0.3 μm.
The ion exchanger 5 is filled with ion exchange resin, and the ion exchange resin is cation exchange resin.
The recovery device further comprises a regenerant storage tank 7 and a regenerant collection tank 8, an outlet of the regenerant storage tank 7 is connected with a regenerant inlet of the ion exchanger 5, a regenerant outlet of the ion exchanger 5 is connected with an inlet of the regenerant collection tank 8, and the regenerant is hydrochloric acid.
And a reverse osmosis membrane is arranged in the reverse osmosis equipment 6, and the aperture of the reverse osmosis membrane is 0.5nm.
The recovery device also comprises a recycling tank 9, and a fresh water outlet of the reverse osmosis device 6 is connected with an inlet of the recycling tank 9.
The outlet of the recycling tank 9 is independently connected with the cleaning water inlet of the medium filter and the ion exchanger 5, and the cleaning water outlet of the medium filter and the ion exchanger 5 is connected with the inlet of the waste water collecting tank 1.
The recycling device in the embodiment is adopted to treat the copper electroplating waste liquid, taking the copper electroplating cleaning waste water of a certain copper electroplating processing factory as an example, the pH value in the water quality index is 5-6, and the conductivity is as follows: 2000-5000 mus/cm, copper ion concentration less than or equal to 100mg/L, and COD value less than or equal to 250mg/L;
the copper electroplating cleaning wastewater is collected and then sequentially enters a sand filter 2 and a carbon filter 3 for filtration, then enters a precision filter 4, and then copper ions and chromium ions in the wastewater are adsorbed by ion exchange resin, the effluent of the ion exchange resin enters reverse osmosis equipment 6 for further purification after being boosted, reverse osmosis concentrated water flows back to a wastewater collection tank 1, and the reverse osmosis purified water is stored in a recycling tank 9; the water in the recycling tank 9 can be recycled and also can be used as backwashing water of sand filtration, carbon filtration and ion exchange resin, and the backwashing water flows back to the wastewater collection tank 1 for secondary treatment.
After being treated by the recovery device, the water quality index of the water body in the recycling tank 9 has a pH value of 6-8 and a conductivity: 20-35 mu s/cm, the concentration of copper ions is less than or equal to 0.05mg/L, the COD value is less than or equal to 50mg/L, the effluent quality can meet the recycling or direct discharging standard, the recovery rate of the copper ions can reach more than 99.95 percent, and the recycling of the electroplating cleaning wastewater is realized.
It can be seen from the above embodiment that, the recycling device of the utility model removes the impurities in the electroplating cleaning wastewater through the sequential arrangement of the devices such as the multi-stage filtration, the ion exchange and the reverse osmosis, so as to reach the recycling standard, fully recycle the valuable metal ions, and effectively realize the resource utilization of the electroplating cleaning wastewater; the recovery device has the advantages of simple structure, low energy consumption of equipment and process, high treatment efficiency and no secondary pollution.
The present invention is described in the above embodiments, but the present invention is not limited to the above detailed device, i.e. the present invention must rely on the above detailed device to implement. It should be clear to those skilled in the art that any improvement of the present invention, to the addition of the equivalent replacement and auxiliary devices of the present invention, the selection of the specific mode, etc., all fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. The resource recycling device for the electroplating cleaning wastewater is characterized by comprising a medium filter, a precision filter, an ion exchanger and reverse osmosis equipment which are sequentially connected, wherein a concentrated water outlet of the reverse osmosis equipment is connected with an inlet of the medium filter.
2. A resource recovery device for electroplating cleaning wastewater as claimed in claim 1, wherein the recovery device further comprises a wastewater collection tank, the outlet of the wastewater collection tank is connected with the inlet of the medium filter, and the concentrated water outlet of the reverse osmosis equipment is connected with the inlet of the wastewater collection tank.
3. A resource recovery device for electroplating cleaning wastewater as claimed in claim 1, wherein the medium filter comprises a sand filter and a carbon filter in sequence, and the outlet of the sand filter is connected with the inlet of the carbon filter;
the media filled in the sand filter comprise quartz sand, and the media filled in the carbon filter comprise activated carbon particles.
4. A resource recovery device for electroplating cleaning wastewater according to claim 3, characterized in that the particle size of the quartz sand is 1-7 mm;
the particle size of the active carbon particles is 3-5 mm.
5. The resource recovery device for the electroplating cleaning wastewater as recited in claim 1, wherein the precision filter is provided with a filter element, and the filter element comprises a polypropylene filter element;
the aperture of the filter element is 0.2-0.5 μm.
6. A resource recovery device for electroplating cleaning wastewater according to claim 1, characterized in that the ion exchanger is filled with ion exchange resin, and the ion exchange resin is cation exchange resin.
7. A resource recovery device for electroplating cleaning wastewater according to claim 6, characterized in that the recovery device further comprises a regenerant storage tank and a regenerant collection tank, wherein the outlet of the regenerant storage tank is connected with the regenerant inlet of the ion exchanger, and the regenerant outlet of the ion exchanger is connected with the inlet of the regenerant collection tank.
8. The recycling device of electroplating cleaning wastewater as recited in claim 1, wherein the reverse osmosis device is provided with a reverse osmosis membrane, and the aperture of the reverse osmosis membrane is 0.1-0.7 nm.
9. A resource recovery device for electroplating cleaning wastewater according to claim 2, characterized in that the recovery device further comprises a recycling tank, and the fresh water outlet of the reverse osmosis equipment is connected with the inlet of the recycling tank.
10. A resource recovery device for electroplating cleaning wastewater according to claim 9, characterized in that the outlet of the reuse tank is connected with the cleaning water inlet of the medium filter, and the cleaning water outlet of the medium filter is connected with the inlet of the wastewater collection tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222883611.8U CN218491603U (en) | 2022-10-31 | 2022-10-31 | Electroplating cleaning wastewater's resource recovery unit |
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| CN202222883611.8U CN218491603U (en) | 2022-10-31 | 2022-10-31 | Electroplating cleaning wastewater's resource recovery unit |
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| CN218491603U true CN218491603U (en) | 2023-02-17 |
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| CN202222883611.8U Active CN218491603U (en) | 2022-10-31 | 2022-10-31 | Electroplating cleaning wastewater's resource recovery unit |
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