CN210367231U - EDTA class strong complex heavy metal wastewater's processing system - Google Patents
EDTA class strong complex heavy metal wastewater's processing system Download PDFInfo
- Publication number
- CN210367231U CN210367231U CN201920312814.7U CN201920312814U CN210367231U CN 210367231 U CN210367231 U CN 210367231U CN 201920312814 U CN201920312814 U CN 201920312814U CN 210367231 U CN210367231 U CN 210367231U
- Authority
- CN
- China
- Prior art keywords
- edta
- pond
- heavy metal
- metal wastewater
- flocculation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
A treatment system for EDTA strong complexing heavy metal wastewater realizes standard discharge of strong complexing nickel-containing wastewater through pH adjustment, advanced oxidation complex breaking, alkaline precipitation reaction, flocculation reaction and standing precipitation; by adding potassium persulfate, hydrogen peroxide, ferrous sulfate and a small amount of Fe-Mn catalyst into the system at the same time, on one hand, a Fenton effect is generated to generate hydroxyl radicals, and on the other hand, ferrous ions can activate the potassium persulfate to generate sulfate radicals, so that EDTA-Ni can be simultaneously oxidized by two radicals. Compared with the traditional Fenton-like technology, the removal rate of EDTA-Ni by the new process is nearly 100%; the technology can realize the standard discharge of nickel directly through physicochemical treatment, does not need subsequent resin advanced treatment, and saves the operation cost.
Description
Technical Field
The utility model relates to a sewage treatment system, especially a processing system of EDTA class strong complex heavy metal waste water.
Background
With the rapid development of the semiconductor industry, the generation of strong complexing heavy metal wastewater is increased. In the production process of electronic elements, due to the use of different complexing agents (EDTA, DTPA, ethanolamine, citric acid, tartaric acid and the like, wherein the complexing property of EDTA is strong), a large number of heavy metal complexes with stable properties are generated, the toxicity is high, the heavy metal complexes are difficult to degrade, and the traditional treatment method is difficult to be used for standard treatment of EDTA type heavy metal wastewater with strong complexing state, such as EDTA-Ni. According to the discharge requirements of the third table of discharge Standard of electroplating pollutants (GB21900-2008), the total nickel content is lower than 0.1 mg/L. The conventional ion exchange method and adsorption method have limited removal effect when processing EDTA-Ni, and the ion exchange resin and the adsorbent also need to consider the regeneration problem; although the effect of the Fenton precipitation method is improved, the standard discharge of nickel is still difficult to realize; the method of photocatalysis and precipitation has the disadvantages of high energy consumption and the like.
The chinese patent application publication No. CN104528987A adopts fenton oxidation technology to remove the complex nickel. The method has certain effect on removing the nickel-containing complex with weak complexing ability, but has low efficiency on removing the strong complexing nickel such as EDTA-Ni. Therefore, the continuous and stable nickel removal effect cannot be obtained, and the emission of nickel is easy to exceed the standard.
The treatment method of nickel-containing wastewater generated by anodic oxidation hole sealing of Chinese patent application with publication number CN105461119B comprises the following main process flows: micro-electrolysis, Fenton, alkali precipitation, flocculation and ion exchange. The process has the advantages of high sludge yield, complex process and further increased treatment cost due to the use of the ion exchange resin.
The Chinese patent application with publication number CN104773867A discloses a method and a system for treating nickel-containing wastewater, the main process flow is as follows: the sodium hyponatrite complex breaking reaction tank, the pH adjusting tank 1, the calcium salt reaction tank, the coagulating sedimentation tank, the pH adjusting tank 2, the Fenton reaction tank, the pH adjusting tank 3, the Fenton sedimentation tank and the ammonia nitrogen reaction tank. The method can realize the water quality of the nickel-containing effluent to reach the standard, but the operation process is too complicated, and the treatment cost is relatively increased.
The Chinese patent application with publication number CN108658211A adopts an oxidation method of activating persulfate and coupling Fenton by zero-valent iron to remove PPCPs organic pollutants. Although a better removal effect can be achieved, in practical engineering applications, the effect is inferior to that of a homogeneous reaction in large-scale applications because of the heterogeneous reaction.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: aiming at the defects of the prior art, the invention provides the EDTA type strong-complexing heavy metal wastewater treatment system which can effectively remove EDTA-Ni containing strong-complexing state and realize standard discharge of complexing heavy metal wastewater.
The technical scheme is as follows: the utility model discloses a treatment system of EDTA strong complexing heavy metal wastewater, which comprises a PH adjusting heat exchanger, an advanced oxidation pond, an alkali adding sedimentation pond, a flocculation pond, a sedimentation pond and a PH adjusting drainage pond which are sequentially communicated; the PH regulation heat exchanger is provided with a water inlet, a heating thermostat and a PH medicament regulator, the advanced oxidation pond is provided with a medicament feeding device, the alkali-adding sedimentation pond is provided with a basic medicament feeding device, the flocculation pond is provided with a flocculation medicament feeding device, the sedimentation pond is communicated with a filter press, and the PH regulation drainage pond is provided with a water inlet and a PH medicament regulator.
And dilute sulfuric acid is added into the PH regulating heat exchanger and the PH medicament regulator in the PH regulating drainage pool.
Wherein, the medicament adding device in the advanced oxidation tank adds hydrogen peroxide, potassium persulfate, ferrous sulfate heptahydrate and a small amount of Fe-Mn solid-phase catalyst.
Wherein, an alkaline medicine feeder in the alkaline precipitation tank feeds a sodium hydroxide solution.
And a flocculating agent adding device in the flocculation tank adds a polyacrylamide solution.
When the treatment system for the EDTA strong-complexing heavy metal wastewater is used, firstly, the strong-complexing heavy metal wastewater is discharged into a heat exchanger, the temperature is changed to 35 ℃, and dilute sulfuric acid is added to adjust the pH value of the wastewater to 2-4; then discharging the regulated strong complex heavy metal wastewater into an advanced oxidation reaction tank, and simultaneously adding hydrogen peroxide, potassium persulfate, ferrous sulfate heptahydrate and a small amount of Fe-Mn solid-phase catalyst into the wastewater; reacting for 2-2.5 h under continuous stirring to generate enough hydroxyl free radicals and sulfate free radicals, and carrying out a complex breaking reaction on EDTA-Ni; then discharging the reaction water into an alkali-adding sedimentation tank, adding a sodium hydroxide solution, adjusting the pH value of the treated water to 10-12, carrying out alkali-adding sedimentation reaction for 2.5h, and converting metal ions into hydroxide sediment; then, discharging the treated water into a flocculation tank, adding a polyacrylamide solution, and reacting for 2.5 hours under slow stirring; finally, discharging the treated water into a sedimentation tank, standing and precipitating for 3 hours, wherein the nickel content of the supernatant can reach the discharge standard, and the supernatant can be directly discharged after the pH is adjusted to 6-9 by a pH adjusting tank; and (3) guiding the sludge generated in the sedimentation tank into a filter press for dehydration treatment, returning the squeezed water to the front end of the process for treatment, and treating the generated sludge cakes outside.
Compared with the traditional Fenton technology, the system adds persulfate oxidation technology on the basis of Fenton, and is more obvious to the broken complex effect of strong complex nickel. The process can effectively remove EDTA-Ni only through physicochemical treatment, realizes standard discharge, and does not need to add subsequent resin equipment for advanced treatment, thereby greatly saving the cost.
Has the advantages that: the utility model discloses a processing system of EDTA class strong complex heavy metal waste water is through combining together fenton's technique and persulfate oxidation technology, through hydroxyl free radical and sulfate radical free radical synergism, carries out the oxidation to EDTA-Ni and breaks the complex, and is obvious to the effect of getting rid of strong complex nickel.
Drawings
FIG. 1 is a schematic structural diagram of a treatment system for EDTA-based strongly-complexed heavy metal wastewater.
Detailed Description
The invention will be further explained with reference to fig. 1.
The utility model discloses a treatment system of EDTA strong complexing heavy metal wastewater, which comprises a PH adjusting heat exchanger, an advanced oxidation pond, an alkali adding sedimentation pond, a flocculation pond, a sedimentation pond and a PH adjusting drainage pond which are sequentially communicated; the PH regulation heat exchanger is provided with a water inlet, a heating thermostat and a PH medicament regulator, the advanced oxidation pond is provided with a medicament feeding device, the alkali-adding sedimentation pond is provided with a basic medicament feeding device, the flocculation pond is provided with a flocculation medicament feeding device, the sedimentation pond is communicated with a filter press, and the PH regulation drainage pond is provided with a water inlet and a PH medicament regulator.
And dilute sulfuric acid is added into the PH regulating heat exchanger and the PH medicament regulator in the PH regulating drainage pool.
Wherein, the medicament adding device in the advanced oxidation tank adds hydrogen peroxide, potassium persulfate, ferrous sulfate heptahydrate and a small amount of Fe-Mn solid-phase catalyst.
Wherein, an alkaline medicine feeder in the alkaline precipitation tank feeds a sodium hydroxide solution.
And a flocculating agent adding device in the flocculation tank adds a polyacrylamide solution.
When the treatment system for the EDTA strong-complexing heavy metal wastewater is used, firstly, the strong-complexing heavy metal wastewater is discharged into a heat exchanger, the temperature is changed to 35 ℃, and dilute sulfuric acid is added to adjust the pH value of the wastewater to 2-4; then discharging the regulated strong complex heavy metal wastewater into an advanced oxidation reaction tank, and simultaneously adding hydrogen peroxide, potassium persulfate, ferrous sulfate heptahydrate and a small amount of Fe-Mn solid-phase catalyst into the wastewater; reacting for 2-2.5 h under continuous stirring to generate enough hydroxyl free radicals and sulfate free radicals, and carrying out a complex breaking reaction on EDTA-Ni; then discharging the reaction water into an alkali-adding sedimentation tank, adding a sodium hydroxide solution, adjusting the pH value of the treated water to 10-12, carrying out alkali-adding sedimentation reaction for 2.5h, and converting metal ions into hydroxide sediment; then, discharging the treated water into a flocculation tank, adding a polyacrylamide solution, and reacting for 2.5 hours under slow stirring; finally, discharging the treated water into a sedimentation tank, standing and precipitating for 3 hours, wherein the nickel content of the supernatant can reach the discharge standard, and the supernatant can be directly discharged after the pH is adjusted to 6-9 by a pH adjusting tank; and (3) guiding the sludge generated in the sedimentation tank into a filter press for dehydration treatment, returning the squeezed water to the front end of the process for treatment, and treating the generated sludge cakes outside.
Compared with the traditional Fenton technology, the system adds persulfate oxidation technology on the basis of Fenton, and is more obvious to the broken complex effect of strong complex nickel. The process can effectively remove EDTA-Ni only through physicochemical treatment, realizes standard discharge, and does not need to add subsequent resin equipment for advanced treatment, thereby greatly saving the cost.
The utility model discloses a processing system of EDTA class strong complex heavy metal waste water is through combining together fenton's technique and persulfate oxidation technology, through hydroxyl free radical and sulfate radical free radical synergism, carries out the oxidation to EDTA-Ni and breaks the complex, and is obvious to the effect of getting rid of strong complex nickel.
The utility model provides a thinking and method of EDTA class strong complex heavy metal wastewater's processing system, the method and the way that specifically realize this technical scheme are many, above only the utility model discloses a preferred embodiment should point out, to ordinary technical personnel in this technical field, do not deviate from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements and moist decorations should also be regarded as the utility model discloses a protection scope, each component that does not make clear and definite in this embodiment all can be realized with prior art.
Claims (4)
1. A treatment system for EDTA type strong complexing heavy metal wastewater is characterized by comprising a PH regulation heat exchanger, an advanced oxidation pond, an alkali-adding sedimentation pond, a flocculation pond, a sedimentation pond and a PH regulation drainage pond which are sequentially communicated; the PH regulation heat exchanger is provided with a water inlet, a heating thermostat and a PH medicament regulator, the advanced oxidation pond is provided with a medicament feeding device, the alkali-adding sedimentation pond is provided with a basic medicament feeding device, the flocculation pond is provided with a flocculation medicament feeding device, the sedimentation pond is communicated with a filter press, and the PH regulation drainage pond is provided with a water inlet and a PH medicament regulator.
2. The treatment system for EDTA-based strong complex heavy metal wastewater according to claim 1, wherein dilute sulfuric acid is added into the PH regulation heat exchanger and the PH agent regulator in the PH regulation drainage pool.
3. The treatment system for the EDTA-based strong complex heavy metal wastewater as claimed in claim 1, wherein the alkaline drug dispenser in the alkaline precipitation tank adds sodium hydroxide solution.
4. The treatment system for the EDTA-based strong complex heavy metal wastewater as claimed in claim 1, wherein the polyacrylamide solution is added by the flocculating agent adding device in the flocculation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920312814.7U CN210367231U (en) | 2019-03-12 | 2019-03-12 | EDTA class strong complex heavy metal wastewater's processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920312814.7U CN210367231U (en) | 2019-03-12 | 2019-03-12 | EDTA class strong complex heavy metal wastewater's processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210367231U true CN210367231U (en) | 2020-04-21 |
Family
ID=70245277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920312814.7U Active CN210367231U (en) | 2019-03-12 | 2019-03-12 | EDTA class strong complex heavy metal wastewater's processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210367231U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072286A (en) * | 2021-04-27 | 2021-07-06 | 北京建筑大学 | Sludge conditioning method for improving sludge dewatering capacity |
| CN113488220A (en) * | 2021-06-04 | 2021-10-08 | 华中科技大学 | Method for treating radioactive anion exchange resin by combination of persulfuric acid compound and Fenton-like oxidation |
| CN114177815A (en) * | 2021-12-09 | 2022-03-15 | 潍坊科技学院 | Micro mixer and device for continuously treating nickel-containing wastewater by using same |
| CN114920409A (en) * | 2022-06-15 | 2022-08-19 | 苏州苏净环保工程有限公司 | Zero-emission treatment system and method for nitrogen and phosphorus-containing wastewater of automobile part factory |
-
2019
- 2019-03-12 CN CN201920312814.7U patent/CN210367231U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072286A (en) * | 2021-04-27 | 2021-07-06 | 北京建筑大学 | Sludge conditioning method for improving sludge dewatering capacity |
| CN113488220A (en) * | 2021-06-04 | 2021-10-08 | 华中科技大学 | Method for treating radioactive anion exchange resin by combination of persulfuric acid compound and Fenton-like oxidation |
| CN114177815A (en) * | 2021-12-09 | 2022-03-15 | 潍坊科技学院 | Micro mixer and device for continuously treating nickel-containing wastewater by using same |
| CN114177815B (en) * | 2021-12-09 | 2024-02-02 | 潍坊科技学院 | Micromixer and device for continuously treating nickel-containing wastewater by utilizing micromixer |
| CN114920409A (en) * | 2022-06-15 | 2022-08-19 | 苏州苏净环保工程有限公司 | Zero-emission treatment system and method for nitrogen and phosphorus-containing wastewater of automobile part factory |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210367231U (en) | EDTA class strong complex heavy metal wastewater's processing system | |
| CN110510768B (en) | Combined treatment method of chemical nickel plating wastewater | |
| US20130168314A1 (en) | Method for Treating Wastewater Containing Copper Complex | |
| CN102211830B (en) | Method for treating cutting liquid wastewater by electro-catalytic oxidation | |
| CN108218129B (en) | Treatment method of chemical nickel plating wastewater | |
| CN103641230B (en) | Method for carrying out organic wastewater pretreatment by using an iron-carbon-Fenton-integrated reactor | |
| CN204607751U (en) | The treatment facility up to standard of admiro waste water | |
| CN105800821A (en) | Up-to-standard treatment method and device for zinc-nickel alloy waste water | |
| CN103739128B (en) | Pretreatment system and pretreatment method for high-concentration refractory organic wastewater | |
| CN111268826A (en) | Treatment process of strong-complexing heavy metal wastewater | |
| CN102452764B (en) | Three-stage biological comprehensive treatment method for printed circuit board waste water | |
| CN110668533A (en) | Method and system for treating alkaline chemical nickel plating wastewater | |
| CN104787933B (en) | Treatment method for gold-smelting cyanide-containing wastewater | |
| CN108083563A (en) | A kind of admiro waste liquid, chemical nickel waste liquid and pickle liquor collaboration treatment process | |
| CN211169989U (en) | System for treating alkaline chemical nickel plating wastewater | |
| CN109437447A (en) | A kind of preprocess method of guanine waste water | |
| CN111470671B (en) | Method for treating arsenic-containing organic wastewater | |
| CN101428887B (en) | Treatment for nickel-ammonia wastewater with aeration-hydrolyzing process | |
| CN112520913A (en) | Pretreatment process for treating refractory organic wastewater by electric flocculation | |
| CN112358095A (en) | Treatment method of EDTA complex nickel wastewater | |
| CN105110515B (en) | A kind of processing method of DSD acid waste water | |
| CN111620467A (en) | Sewage advanced treatment system and method | |
| CN111320302A (en) | Process for standard emission and efficient sedimentation of low-concentration copper-containing wastewater in semiconductor industry | |
| CN203602428U (en) | Device for removing EDTA (ethylene diamine tetraacetic acid) in waste water | |
| CN203269712U (en) | Zero discharge treatment device for heavy metal wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |