CN211688726U - Electroplating wastewater treatment device for treating metal-chelating agent complex - Google Patents
Electroplating wastewater treatment device for treating metal-chelating agent complex Download PDFInfo
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- CN211688726U CN211688726U CN202020116908.XU CN202020116908U CN211688726U CN 211688726 U CN211688726 U CN 211688726U CN 202020116908 U CN202020116908 U CN 202020116908U CN 211688726 U CN211688726 U CN 211688726U
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Abstract
The utility model provides an electroplating wastewater treatment device for treating metal-chelating agent complex, which comprises a device for treating electroplating wastewaterAn electroplating wastewater storage pool, a Fenton oxidation pool, a ferrite generation pool, a concentration pool, a microorganism culture reaction pool, an alkaline adjusting pool, a microorganism supernatant storage pool, a bioleaching device and a filter press which are connected with a water outlet pipe. The utility model provides an electroplating wastewater treatment device can effectively dissociate metal-chelator complex in metal-chelator complex electroplating wastewater to generate good chemical stability, soft magnetic and compact structure, can regard as the raw and other materials recycle of the preparation of magnetic material, accumulator and microwave device, have stable ferrite M that has the spinel structurexFen(1‑x)·nFe2O3And nontoxic solid residues as building materials, and the generated sludge has lower water content and faster sedimentation speed.
Description
Technical Field
The utility model belongs to electroplating effluent treatment plant field, concretely relates to handle electroplating effluent treatment plant of metal-chelator complex.
Background
The electroplating wastewater comprises waste electroplating solution, workpiece cleaning water, other workshop cleaning water and other wastewater in the metal surface treatment process. The metal surface treatment refers to the treatment and plating addition of a plating layer on the surface of a metal workpiece, wherein the plating layer metal can be a single metal or an alloy of multiple metals, and the treatment process comprises electroplating, chemical plating (water plating), hot dipping and physical and chemical methods (such as vacuum plating, ion plating and the like) according to the physical and chemical properties of the metal and the requirements of a plating technology. The corrosion resistance, the wear resistance and the like of the metal workpiece can be enhanced by adding the coating, the friction coefficient and the like of the surface of the workpiece can be changed to obtain new characteristics, the appearance (such as ornaments) and the like of the workpiece can be improved, and the waste water after electroplating treatment contains a large amount of pollutants such as heavy metal ions, organic compounds, cyanides and the like due to the characteristics of the process.
Heavy metals excessively discharged into the environment cause damage to the environment and human health, substances containing heavy metal elements can be directly ingested by human bodies to cause damage, and can be ingested and enriched in the organisms through various organisms in natural environments, and finally ingested and accumulated in the human bodies through the transmission of food chains to cause damage, influence on human development, teratogenesis, pathogenicity and the like. Some heavy metal elements have high concentration required for causing harm to human bodies, but have strong toxicity to certain organisms in the environment and have high environmental risk. In general, free heavy metals are a persistent and profound hazard in the environment.
Electroplating wastewater containing different types of heavy metal ions, such as chelating agents of ethylene diamine tetraacetic acid, EDTA and the like, waste acid, other inorganic matters and organic matters, has great harm to the environment and human health, and particularly, the heavy metal sludge in the electroplating wastewater causes wide social attention due to high toxicity and nondegradable property. In addition, EDTA as a strong complexing agent in the electroplating treatment process can not only improve the mobility of heavy metals, but also make the EDTA have certain resistance to the traditional electroplating wastewater treatment method. Therefore, there is an urgent need for an apparatus for treating electroplating wastewater capable of treating a metal-chelating agent complex.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect, the utility model provides an effectively dissociate metal-chelator complex in metal-chelator complex electroplating effluent to generate good chemical stability, soft magnetic and compact structure, can regard as the preparation raw and other materials recycle of magnetic material, accumulator and microwave device, have stable ferrite M that has the spinel structurexFen(1-x)•nFe2O3And nontoxic solid residues as building materials, and the generated sludge has lower water content and faster sedimentation speed.
The utility model provides a following technical scheme: an electroplating wastewater treatment device for treating a metal chelator complex comprises an electroplating wastewater storage pool, a Fenton oxidation pool, a ferrite generation pool, a concentration pool, a microorganism culture reaction pool, an alkaline regulation pool, a microorganism supernatant storage pool, a biological leaching device and a filter press, wherein the electroplating wastewater storage pool is connected with an electroplating wastewater outlet pipe;
the upper part of the ferrite generation pool is communicated with the microorganism culture reaction pool, the lower part of the ferrite generation pool is communicated with the concentration pool, and a ferrous ion solution supply pool for supplying Fe2+ is externally connected with the ferrite generation pool;
the lower part of the concentration tank is communicated with the alkaline adjusting tank, and the alkaline adjusting tank is communicated with the ferrite generating tank;
the upper part of the microorganism culture reaction tank is communicated with the microorganism supernatant storage tank, and the lower part of the microorganism culture reaction tank is communicated with the concentration tank;
the microorganism supernatant storage pool is communicated with the bioleaching device, the upper part of the bioleaching device is communicated with the filter press, and the lower part of the bioleaching device is communicated with the concentration pool;
and a heavy metal concentration detector is arranged outside the filter press.
Further, an oxidation-reduction potential instrument, a pH acidity meter and a second stirring rod are arranged in the ferrite generation pool.
Further, be provided with first stirring rod in the fenton oxidation pond, it provides Fe to be external to be connected with2+And H2O2The Fenton oxidation solution of the mixed solution provides a pool.
Furthermore, a microorganism culture grid with photocatalyst nanometer catalytic activity is arranged in the microorganism culture reaction tank.
Further, a first aeration device is arranged in the microorganism supernatant storage tank.
Furthermore, an alkali liquor pool for supplying alkali liquor is externally connected to the alkali regulating pool.
Furthermore, the heavy metal concentration detector is respectively connected with the alkaline adjusting tank and the water outlet tank.
Further, a third stirring rod is arranged in the biological leaching device.
Further, the third stirring rod is a double-propeller stirring rod.
Further, a second aeration device is arranged at the bottom in the bioleaching device.
The utility model has the advantages that: 1) the Fenton oxidation pond is adopted for treating the electroplating wastewater with the metal-chelating agent complex, so that free heavy metal ions can be continuously released while the decomposition of the metal-chelating agent complex is effectively degraded through redox reaction in the Fenton oxidation pond, and the oxidation product is O which is friendly to the environment2、OH-And H2O, and the released free heavy metal ions and residual ferrous ions are subjected to further reduction and collection of the heavy metal ions by a ferrite generation pool, wherein the residual ferrous ions serve as a source of iron ions generated by the ferrite. And furthermore, the metal-chelating agent complex can effectively achieve harmless treatment of electroplating wastewater, can collect heavy metal ions, prevent environmental pollution, and can change waste or waste treated into production raw materials for producing other products.
2) The ferrite generating pool is adopted to treat the heavy metals in the electroplating wastewater, and compared with the prior art, the ferrite generating pool can generate the electroplating wastewater containing heavy metal ions into ferrite M with a stable spinel structurexFen(1-x)•nFe2O3The composite material has proper chemical stability, soft magnetism and compact structure, can be used as a raw material for manufacturing magnetic materials, energy accumulators and microwave devices for recycling, and has the advantages of high efficiency of removing metal ions, easy solid-liquid separation, low cost and the like compared with the common alkaline precipitation method in the prior art. And the sludge generated by treating the electroplating wastewater by adopting the ferrite generating tank has lower water content and higher sedimentation speed.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of an entire apparatus for treating an electroplating wastewater containing a metal-chelating agent complex according to the present invention;
FIG. 2 is a schematic view of the ferrite generating tank in the electroplating wastewater treatment device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in the figures 1-2, for the utility model provides a handle electroplating effluent treatment plant of metal-chelator complex, include electroplating effluent reservoir 1, fenton oxidation pond 2, ferrite formation pond 3, concentrated pond 4, microorganism culture reaction tank 5, alkaline equalizing basin 6, microorganism supernatant reservoir 7, bioleaching ware 8 and pressure filter 9 that link to each other with the electroplating effluent outlet pipe.
After the electroplating wastewater with the heavy metal-chelating agent complex M-EDTA enters the Fenton oxidation pond 2 from the electroplating wastewater storage pond 1, a first stirring rod 2-1 is arranged in the Fenton oxidation pond 2, and Fe is provided outside the Fenton oxidation pond2+And H2O2Pool 2-2 is provided to mixed solution's fenton oxidation solution, and electroplating effluent and mixed solution constantly stir through first stirring rod 2-1 and take place the reaction in fenton oxidation pool 2:
Fe2++ H2O2→ Fe3++ OH + OH-，
other organic pollutants and cyanides in the electroplating wastewater can be decomposed in the Fenton oxidation pond 2, so that excessive COD is eliminated;
then the reaction is carried out in a ferrite generating pool 3:
Fe3++ M-EDTA → Fe(Ⅲ)-EDTA + Mn+；
xMn++n(1-x)Fe2++ 2nFe3++ 6nOH-→ MxFen(1-x)•nFe2O3+ 3nH2O。
FeSO is added into the Fenton oxidation pond 24And H2O2React to produce Fe3+Generation of Fe3+Performing displacement reaction with metal-chelating agent complex M-EDTA in a ferrite generation tank 3 to generate free heavy metal ions Mn+Formation of heavy metal ion Mn+With FeSO added into a ferrite generation tank4Reacting under alkaline condition, co-precipitating to form a kind of patina, dewatering, and finally converting the patina into stable ferrite M with spinel structure in ferrite generation tankxFen(1-x)•nFe2O3The magnetic material has good chemical stability, soft magnetism and compact structure, and can be recycled as a raw material for manufacturing magnetic materials, energy accumulators and microwave devices.
The generated ferrite enters a concentration tank 4, is continuously precipitated in the concentration tank 4 and finally is deposited, the residual sludge containing the metal-chelating agent is pumped into an alkaline adjusting tank 6 by a peristaltic pump again for alkaline adjustment, and then the alkaline adjustment is carried out again in the alkaline adjusting tank 6The ferrite generating pool 3 reacts to generate ferrite M with a spinel structurexFen(1-x)•nFe2O3The part is continuously circulated, so that the dissociation of the metal in the metal-chelating agent in the electroplating wastewater and the chelating agent and the removal efficiency of the heavy metal are enhanced.
The alkaline condition in the ferrite generating pool 3 is pumped into an alkaline adjusting pool 6-1 from an alkaline solution providing pool 10, the pH value is adjusted to 9-11 by the alkaline adjusting pool 6-1, NaOH alkaline solution is continuously pumped into the ferrite generating pool 3 by a peristaltic pump to maintain the alkaline environment in the ferrite generating pool, and the ferrous ions in the ferrite generating pool 3 are supplied with Fe from the outside2+Is supplied from a supply tank 3-1, and Fe is supplied2+The solution of (2) can be ferrous sulfate, ferric chloride and the like.
An oxidation-reduction potentiometer 3-2, a pH acidity meter 3-3 and a second stirring rod 3-4 are arranged in the ferrite generation pool 3 and used for respectively ensuring that the oxidation-reduction reaction in the ferrite generation pool 3 is smoothly carried out, the pH environment required by the ferrite generation before the oxidation-reduction reaction reaches the standard, and the second stirring rod 3-4 is used for continuously and fully stirring the solution entering after the electroplating wastewater and the solution in the Fenton oxidation pool 2 react so as to ensure that the ferrite generation reaction is smoothly carried out.
The supernatant in the ferrite generating tank 3 also contains a part of other electroplating sewage components which are not eliminated, such as organic pollutants, cyanides and other compounds, the supernatant enters the microorganism culture reaction tank 5 to carry out microorganism fermentation and digestion on the residual organic pollutants and cyanides in the supernatant, the upper part of the microorganism culture reaction tank 5 is provided with a microorganism culture grid 5-1 with photocatalyst nanometer catalytic activity, the microorganism fermentation process can be effectively catalyzed by the photocatalyst, the living environment of the microorganism is improved, the microorganism activity in the microorganism culture reaction tank 5 is ensured, the catalytic fermentation activity and the living and fermentation capacity of the microorganism are further improved by improving the microorganism culture grid 5-1, and the removing capacity of the organic pollutants, the cyanides and other wastes in the electroplating wastewater is doubly improved.
The lower part of the microorganism culture reaction tank 5 is communicated with the concentration tank 4, the digestion product is further subjected to alkaline regulation after concentration, and the microorganism fermentation is carried out after the ferrite generation step is completed, so that the removal efficiency of various pollutants in the electroplating wastewater is ensured.
The upper part of the microorganism culture reaction tank 5 is communicated with a microorganism supernatant storage tank 7, and the bottom of the microorganism supernatant storage tank 7 is provided with an aeration device, so that the internal oxygen content can be improved, and the living environment of microorganisms and the fermentation digestion capacity of the microorganisms on wastes such as organic pollutants are ensured;
the microorganism supernatant storage tank 7 is communicated with the bioleaching device 8, and in the bioleaching process, the microorganism stock solution can further effectively leach heavy metals which are not eliminated by the Fenton oxidation tank 2 and the ferrite generation tank 3 in the electroplating sewage within a plurality of hours in the stirring reactor. The bioleaching device 8 is internally provided with a double-propeller stirring rod 8-1, and the bottom of the bioleaching device is provided with a second aeration device 8-2, so that the bioleaching is ensured to be smoothly carried out, and the full mixing of the microorganism stock solution and the electroplating wastewater and the survival and fermentation activity of microorganisms are ensured.
The upper part of the bioleaching device 8 is communicated with a filter press 9, after bioleaching, solid-liquid separation is carried out on the membrane filter press 9 with the squeezing pressure of 0.8mpa, a heavy metal concentration detector 10 is arranged outside the filter press 9, and the heavy metal concentration detector 10 is respectively connected with the alkaline adjusting tank 6 and the water outlet tank 11. The solid and liquid separated by the filter press 9 is detected by the heavy metal concentration detector 10, if the solid and liquid meet the detoxification standard, the liquid is discharged into the water outlet pool 11, and the solid filtering residues are washed and dried in sequence, so that the solid and liquid filter can be used for building materials. If the substances do not meet the detoxification standard, the solid-liquid separator is further added into the alkaline regulating reservoir 6 to repeat the steps of ferrite generation, microbial fermentation and bioleaching until all the substances treated by the electroplating wastewater meet the detoxification standard, and then the substances can be discharged.
The lower part of the bioleaching device 8 is communicated with the concentration tank 4, and residues of bioleaching can enter the concentration tank 4 for concentration and then enter the step of ferrite generation, microbial fermentation and bioleaching through alkaline regulation to circulate, so that the treated matters of the electroplating wastewater finally accord with the environmental discharge standard.
Through the metal-chelating agent complex electroplating wastewater treatment device provided by the utility model, the effective dissociation of the metal-chelating agent complex can be effectively ensured, the effective removal of heavy metal ions in the metal-chelating agent complex is ensured, ferrite with a spinel structure which can be used as a raw material for manufacturing magnetic materials, energy accumulators and microwave devices is generated, meanwhile, the microorganism fermentation and leaching steps are subsequently added, the elimination of pollutants harmful to the environment such as heavy metal ions, organic pollutants and cyanides can be further ensured, finally, the solid-liquid separation through a filter press is carried out, after the detection of a middle-level book concentration detector 10, the solid filtering residue can be further utilized as building materials after being cleaned and dried, the environment is ensured not to be polluted, the treated substances of the electroplating wastewater are effectively utilized as production materials, and the harmless treatment of the electroplating wastewater of the metal-chelating agent complex is effectively realized, can collect heavy metal ion, when preventing polluted environment, can become the production raw materials behind discarded object or the waste disposal and carry out the production of other products.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. An electroplating wastewater treatment device for treating a metal-chelating agent complex comprises an electroplating wastewater storage pool (1) connected with an electroplating wastewater outlet pipe, and is characterized by further comprising a Fenton oxidation pool (2), a ferrite generation pool (3), a concentration pool (4), a microorganism culture reaction pool (5), an alkaline adjusting pool (6), a microorganism supernatant storage pool (7), a bioleaching device (8) and a filter press (9);
the upper part of the ferrite generating pool (3) is communicated with the microorganism culture reaction pool (5), and the ferrite generating pool(3) The lower part of the ferrite generating tank (3) is communicated with the concentration tank (4), and the ferrite generating tank (3) is externally connected with a supply of Fe2+A ferrous ion solution supply tank (3-1);
the lower part of the concentration tank (4) is communicated with the alkaline adjusting tank (6), and the alkaline adjusting tank (6) is communicated with the ferrite generating tank (3);
the upper part of the microorganism culture reaction tank (5) is communicated with the microorganism supernatant storage tank (7), and the lower part of the microorganism culture reaction tank (5) is communicated with the concentration tank (4);
the microorganism supernatant storage pool (7) is communicated with the bioleaching device (8), the upper part of the bioleaching device (8) is communicated with a filter press (9), and the lower part of the bioleaching device (8) is communicated with the concentration pool (4);
and a heavy metal concentration detector (10) is arranged outside the filter press (9).
2. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as defined in claim 1, wherein the ferrite formation tank (3) is provided with an oxidation-reduction potentiometer (3-2), a pH meter (3-3) and a second stirring rod (3-4).
3. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as set forth in claim 1, wherein the Fenton oxidation tank (2) is internally provided with a first stirring rod (2-1) externally connected with Fe2+And H2O2The Fenton oxidation solution of the mixed solution is provided to a pool (2-2).
4. The device for treating the electroplating wastewater of metal-chelator complex according to claim 1, wherein a microorganism culture grid (5-1) with photocatalyst nanocatalysis activity is arranged in the microorganism culture reaction tank (5).
5. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as set forth in claim 1, wherein a first aeration device (7-1) is provided in the storage tank (7) for the supernatant of microorganisms.
6. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as set forth in claim 1, wherein the alkaline control bath (6) is externally connected with a lye bath (6-1) for supplying lye.
7. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as defined in claim 1, wherein the heavy metal concentration detector (10) is connected to the alkaline control tank (6) and the effluent tank (11), respectively.
8. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as defined in claim 1, wherein a third stirring rod (8-1) is provided in the bioleaching vessel (8).
9. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as set forth in claim 8, wherein the third stirring rod (8-1) is a twin-propeller stirring rod.
10. The apparatus for treating an electroplating wastewater of metal-chelating agent complex as set forth in claim 1, wherein the bioleaching vessel (8) is provided with a second aeration means (8-2) at the bottom thereof.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591926A (en) * | 2020-10-21 | 2021-04-02 | 孙亚春 | Treatment process for complexing heavy metal wastewater |
| CN116803931A (en) * | 2023-08-15 | 2023-09-26 | 连云港绿润环保科技有限公司 | Recovery system and method for waste alkali liquor containing heavy metals |
| CN117509996A (en) * | 2024-01-05 | 2024-02-06 | 山东域潇锆钛矿业股份有限公司 | Wastewater treatment device and wastewater treatment method for perovskite flotation |
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2020
- 2020-01-18 CN CN202020116908.XU patent/CN211688726U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591926A (en) * | 2020-10-21 | 2021-04-02 | 孙亚春 | Treatment process for complexing heavy metal wastewater |
| CN116803931A (en) * | 2023-08-15 | 2023-09-26 | 连云港绿润环保科技有限公司 | Recovery system and method for waste alkali liquor containing heavy metals |
| CN116803931B (en) * | 2023-08-15 | 2024-03-08 | 连云港绿润环保科技有限公司 | Recovery system and method for waste alkali liquor containing heavy metals |
| CN117509996A (en) * | 2024-01-05 | 2024-02-06 | 山东域潇锆钛矿业股份有限公司 | Wastewater treatment device and wastewater treatment method for perovskite flotation |
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