CN215403561U - Device for treating metal wastewater by electro-Fenton - Google Patents
Device for treating metal wastewater by electro-Fenton Download PDFInfo
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- CN215403561U CN215403561U CN202121785239.6U CN202121785239U CN215403561U CN 215403561 U CN215403561 U CN 215403561U CN 202121785239 U CN202121785239 U CN 202121785239U CN 215403561 U CN215403561 U CN 215403561U
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Abstract
The utility model relates to a device for treating metal wastewater by electro-Fenton, which comprises an electro-flocculation tank, an electro-Fenton reactor and a reaction sedimentation tank, wherein the lower end of the electro-flocculation tank is connected with a raw water tank, the water outlet of the electro-flocculation tank is connected with the water inlet of the electro-Fenton reactor, the water outlet of the electro-Fenton reactor is connected with the water inlet of the reaction sedimentation tank, the tail end of the reaction sedimentation tank is provided with a standard discharge port, the electro-flocculation tank is communicated with an acid dosing tank, an alkali dosing tank I, a hydrogen peroxide dosing tank and a ferrous sulfate dosing tank, the reaction sedimentation tank is communicated with an alkali dosing tank II and a flocculating agent dosing tank, a plate electrode connected with the power supply I is arranged in the electro-flocculation tank, and an anode rod and a cathode plate connected with the power supply II are arranged in the electro-Fenton reactor. The electro-Fenton reactor is arranged, the ferric salt is continuously recycled through electrochemical reaction, the use of chemical agents is greatly reduced, the addition amount of the ferrous sulfate is 20% of that of the traditional Fenton technology, the sludge yield is reduced by 80%, and the energy is saved and the environment is protected.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a device for treating metal wastewater by electro-Fenton.
Background
The electroplating wastewater contains heavy metals with higher concentration, such as: copper, nickel, chromium and other substances need to be separated from water in a manner of adding chemical agents, but part of electroplating wastewater contains organic matters with strong complexing performance such as EDTA and the like, so that heavy metals are difficult to precipitate and separate. The Fenton technology has the characteristics of simple and rapid method, simple investment, normal temperature and pressure and the like, but the Fenton technology has insufficient mineralized organic matters, needs a large amount of ferric salt and generates a large amount of sludge to be treated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for treating metal wastewater by electro-Fenton, which is used for solving the problems that organic matters are insufficiently mineralized and a large amount of ferric salt is needed in the Fenton technology in the prior art.
The utility model provides a device for treating metal wastewater by electro-Fenton, which comprises an electro-flocculation tank, an electro-Fenton reactor and a reaction sedimentation tank, wherein a water inlet is formed in the lower end of the electro-flocculation tank and is connected with a raw water tank through the water inlet, a water outlet of the electro-flocculation tank is connected with the water inlet of the electro-Fenton reactor, a water outlet of the electro-Fenton reactor is connected to the water inlet of the reaction sedimentation tank, a standard discharge port is formed in the tail end of the reaction sedimentation tank, the electro-flocculation tank is communicated with an acid dosing tank, an alkali dosing tank I, a hydrogen peroxide dosing tank and a ferrous sulfate dosing tank, the reaction sedimentation tank is communicated with an alkali dosing tank II and a flocculant dosing tank, a plate electrode connected with a power supply I is installed in the electro-flocculation tank, and an anode rod and a cathode plate connected with the power supply II are installed in the electro-Fenton reactor.
Further, the electric flocculation tank includes flocculation district and clear liquid district, the plate electrode of electric flocculation tank sets up in the flocculation district, sour medicine adding jar and alkali medicine adding jar all communicate to the flocculation district, and flocculation district installation PH on-line measuring appearance one, sour medicine adding jar still communicates clear liquid district, and clear liquid district installation PH on-line measuring appearance two, hydrogen peroxide solution medicine adding jar, ferrous sulfate medicine adding jar all communicate to clear liquid district, install the baffle between flocculation district and the clear liquid district, the baffle middle part sets up the through-hole, and L type aqueduct is connected to this through-hole, and waste water gets into the clear liquid district through the aqueduct after electric flocculation is accomplished to the electric flocculation pond from the flocculation district.
Further, the sediment machine is scraped in the flocculation district setting of electric flocculation tank, scrape the sediment machine and pass through outside actuating mechanism left and right reciprocating motion, the bottom of scraping the sediment machine sets up the scraper blade, still includes the sediment groove that connects of fixed mounting in electric flocculation tank flocculation district, connect the sediment groove bottom to communicate to the sludge impoundment through the pipeline.
Furthermore, a first guide plate is arranged in a flocculation area of the electric flocculation tank, and an outlet at the bottom of the first guide plate is communicated to the sludge tank through a pipeline.
Further, an aeration pipe is arranged at the bottom of a clear liquid zone of the electric flocculation tank and is connected with a compressed air source through an air pipe.
Further, the reaction sedimentation tank comprises a PH adjusting area, a flocculation area and a vertical sedimentation tank, the alkali dosing tank II and the flocculant dosing tank are respectively communicated with the PH adjusting area and the flocculation area, the PH adjusting area is provided with a PH online detector III, the PH adjusting area and the flocculation area are respectively provided with a rapid stirrer and a slow stirrer, the water outlet of the electro-Fenton reactor is connected with the PH adjusting area of the reaction sedimentation tank, the PH adjusting area is communicated with the flocculation area, and the flocculation area is communicated with the vertical sedimentation tank.
Further, a second guide plate is installed on the lower portion of the vertical flow type sedimentation tank, and an outlet at the bottom of the second guide plate is communicated with the sludge tank through a pipeline.
Further, the medicine feeding pumps are arranged at the medicine outlets of the acid medicine feeding tank, the alkali medicine feeding tank I, the hydrogen peroxide medicine feeding tank, the ferrous sulfate medicine feeding tank, the alkali medicine feeding tank II and the flocculating agent medicine feeding tank.
The technical scheme of the utility model has the beneficial effects that:
the device for treating the metal wastewater by electro-Fenton is provided with the electro-Fenton reactor, and through electrochemical reaction, the ferric salt is continuously recycled, so that the use of chemical agents is greatly reduced, the agent cost is reduced, the addition amount of ferrous sulfate is 20% of that of the traditional Fenton technology, and meanwhile, the sludge yield is reduced by 80%, and the device is energy-saving and environment-friendly; the mineralization of organic matters is sufficient, the quality of produced water is guaranteed, and the treatment efficiency is high.
Drawings
FIG. 1 is a schematic view showing the construction of an apparatus for treating metal wastewater by electro-Fenton in accordance with the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-an electric flocculation tank, 2-an electric Fenton reactor, 3-a reaction sedimentation tank, 4-a raw water tank, 5-a standard discharge port, 6-an acid dosing tank, 7-an alkali dosing tank I, 8-a hydrogen peroxide dosing tank, 9-a ferrous sulfate dosing tank, 10-an alkali dosing tank II, 11-a flocculating agent dosing tank, 12-a power supply I, 13-a plate electrode, 14-a power supply II, 15-an anode rod, 16-a cathode plate, 17-a PH online detector I, 18-a PH online detector II, 19-a partition plate, 20-a water guide pipe, 21-a PH online detector III, 22-a rapid mixer, 23-a slow mixer, 24-a slag scraper, 25-a slag receiving tank, 26-a sludge tank, 27-a guide plate I and 28-an aeration pipe, 29-compressed air source, 30-guide plate II and 31-dosing pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
As shown in figure 1, the utility model provides a device for treating metal wastewater by electro-Fenton, which comprises an electro-flocculation tank 1, an electro-Fenton reactor 2 and a reaction sedimentation tank 3, wherein a water inlet is formed in the lower end of the electro-flocculation tank 1 and is connected with a raw water tank 4 through the water inlet, wastewater in the raw water tank 4 enters the lower part of the electro-flocculation tank 1 through the water inlet of the electro-flocculation tank 1, a water outlet of the electro-flocculation tank 1 is connected with the water inlet of the electro-Fenton reactor 2, a water outlet of the electro-Fenton reactor 2 is connected with the water inlet of the reaction sedimentation tank 3, a standard-reaching discharge outlet 5 is formed in the tail end of the reaction sedimentation tank 3 for discharging the standard-reaching water, the electro-flocculation tank 1 is communicated with an acid dosing tank 6, an alkali dosing tank I7, a hydrogen peroxide dosing tank 8 and a ferrous sulfate dosing tank 9, the reaction sedimentation tank 3 is communicated with an alkali dosing tank II 10 and a flocculant dosing tank 11, a plate electrode 13 connected with a power supply I12 is installed in the electro-flocculation tank 1, and carrying out the electrocoagulation reaction in the electrocoagulation cell 1, wherein an anode rod 15 and a cathode plate 16 which are connected with a second power supply 14 are arranged in the electro-Fenton reactor 2.
The electric flocculation tank 1 comprises a flocculation area and a clear liquid area, a plate electrode of the electric flocculation tank 1 is arranged in the flocculation area, the acid dosing tank 6 and the alkali dosing tank I7 are communicated with the flocculation area, and a PH on-line detector I17 is arranged in the flocculation area, an acid dosing tank 6 and an alkali dosing tank 7 automatically dose medicine according to the PH on-line detector I17, the PH value of the flocculation area is adjusted to be about 6, the acid dosing tank 6 is also communicated with a clear liquid area through another passage, and the clear liquid area is provided with a PH online detector II 18, automatically adding acid according to a second pH on-line detector 18, adjusting the pH to about 3, communicating the hydrogen peroxide dosing tank 8 and the ferrous sulfate dosing tank 9 to a clear solution area, a partition plate 19 is arranged between the flocculation area and the clear liquid area, a through hole is arranged in the middle of the partition plate 19, the through hole is connected with an L-shaped water guide pipe 20, the opening of the L-shaped water guide pipe 20 faces upwards, and wastewater enters the upper part of the clear liquid area through the water guide pipe 20 after entering the electric flocculation pool 1 from the flocculation area to complete electric flocculation.
The reaction sedimentation tank 3 comprises a PH adjusting zone, a flocculation zone and a vertical flow sedimentation tank, the alkali dosing tank II 10 and the flocculant dosing tank 11 are respectively communicated with the PH adjusting zone and the flocculation zone, the PH adjusting zone is provided with a PH online detector III 21, the PH is adjusted at 8.5 according to the PH online detector III 21, the PH adjusting zone and the flocculation zone are respectively provided with a rapid stirrer 22 and a slow stirrer 23, the PH adjusting zone of the reaction sedimentation tank 3 is connected with the water outlet of the electro-Fenton reactor 2, the PH adjusting zone is communicated with the flocculation zone, and the flocculation zone is communicated with the vertical flow sedimentation tank.
The working principle of the device for treating metal wastewater by electro-Fenton is as follows: the metal wastewater in the raw water tank 4 enters the lower part of a flocculation zone of an electric flocculation tank 1 through a water inlet of the electric flocculation tank 1, an acid dosing tank 6 and an alkali dosing tank 7 automatically dose the metal wastewater according to a pH online detector I17, the pH value of the flocculation zone is adjusted to 6, the wastewater is subjected to an electric flocculation reaction in the flocculation zone, supernatant enters a clear solution zone of the electric flocculation tank 1 through an L-shaped water guide pipe 20, the acid dosing tank 6 automatically doses the metal wastewater according to a pH online detector II 18, the pH value of the clear solution zone is adjusted to 3, meanwhile, a hydrogen peroxide dosing tank 8 and a ferrous sulfate dosing tank 9 are quantitatively dosed with hydrogen peroxide and ferrous sulfate, the supernatant is pumped into an electric Fenton reactor 2 to perform an electric Fenton reaction, organic matters are further decomposed, ferric salts are continuously recycled through an electrochemical reaction, the supernatant of the electric Fenton reactor 2 flows into a pH adjusting zone of a reaction sedimentation tank 3 to adjust the pH value to 8.5, and then flows into the flocculation zone, and a flocculating agent adding tank 11 is used for adding a flocculating agent for flocculation, a PH adjusting area, a rapid stirrer 22 and a slow stirrer 23 in the flocculation area are continuously stirred, water in the flocculation area flows into a vertical sedimentation tank, muddy water is precipitated in the sedimentation tank, and supernatant is discharged through a standard-reaching discharge port 5 at the upper end.
The flocculation area of electroflocculation pond 1 sets up scrapes sediment machine 24, scrape sediment machine 24 through outside actuating mechanism left and right sides reciprocating motion, the bottom of scraping sediment machine 24 sets up the scraper blade, still includes that fixed mounting connects sediment groove 25 in the flocculation area of electroflocculation pond 1, connect sediment groove 25 bottom to communicate to sludge impoundment 26 through the pipeline, outside actuating mechanism drive scrapes sediment machine 24 and drives the scum of scraper blade with the surface of water and scrape if connect sediment groove 25, the scum finally flows into sludge impoundment 26.
A first guide plate 27 is installed in a flocculation area of the electric flocculation tank 1, a bottom outlet of the first guide plate 27 is communicated to a sludge tank 26 through a pipeline, and sediment generated in the flocculation area flows to the bottom outlet through the first guide plate 27 and finally flows into the sludge tank 26 during emptying.
The bottom of the clear liquid zone of the electric flocculation tank 1 is provided with an aeration pipe 28, the aeration pipe 28 is connected with a compressed air source 29 through an air pipe, the clear liquid zone is stirred by aeration, the stirring efficiency is high, dissolved oxygen is supplemented, hydrogen peroxide is generated in an auxiliary way after clear liquid enters the electro-Fenton reactor 2, and organic matters are degraded by utilizing the strong oxidizing property of hydroxyl radicals.
And a second guide plate 30 is arranged at the lower part of the vertical flow type sedimentation tank, the bottom outlet of the second guide plate 30 is communicated with the sludge tank 26 through a pipeline, and sediments flow to the bottom outlet through the second guide plate 30 and finally enter the sludge tank 26.
And the medicine feeding pumps 31 are arranged at the medicine outlets of the acid medicine feeding tank 6, the alkali medicine feeding tank I7, the hydrogen peroxide medicine feeding tank 8, the ferrous sulfate medicine feeding tank 9, the alkali medicine feeding tank II 10 and the flocculating agent medicine feeding tank 11.
In conclusion, the device for treating metal wastewater by electro-Fenton is provided with the electro-Fenton reactor, through electrochemical reaction, iron salt is continuously recycled, the use of chemical agents is greatly reduced, the agent cost is reduced, the addition amount of ferrous sulfate is 20% of that of the traditional Fenton technology, 80% of sludge yield is reduced, and the device is energy-saving and environment-friendly; the mineralization of organic matters is sufficient, the quality of produced water is guaranteed, and the treatment efficiency is high.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a device of metal waste water is handled to electro-fenton, a serial communication port, including electro-flocculation pond, electro-fenton reactor, reaction sedimentation tank, the electro-flocculation pond lower extreme sets up the water inlet and connects the former pond through this water inlet, the water inlet of electro-fenton reactor is connected to the delivery port of electro-fenton reactor, the delivery port of electro-fenton reactor is connected to the water inlet of reaction sedimentation tank, the tail end of reaction sedimentation tank sets up discharge port up to standard, electro-flocculation pond intercommunication acid dosing tank, alkali dosing tank one, hydrogen peroxide solution dosing tank, ferrous sulfate dosing tank, reaction sedimentation tank intercommunication alkali dosing tank two and flocculating agent dosing tank, the electrode board of installation and power one connection in the electro-flocculation tank, installation and the positive pole and the negative plate of power two connections in the electro-fenton reactor.
2. An electro-Fenton device for treating metal wastewater according to claim 1, wherein the electro-flocculation tank comprises a flocculation area and a clear liquid area, the electrode plates of the electro-flocculation tank are arranged in the flocculation area, the first acid dosing tank and the first alkali dosing tank are communicated to the flocculation area, the flocculation area is provided with the first PH online detector, the first acid dosing tank is further communicated with the clear liquid area, the second PH online detector is arranged in the clear liquid area, the second hydrogen peroxide dosing tank and the first ferrous sulfate dosing tank are communicated to the clear liquid area, a partition plate is arranged between the flocculation area and the clear liquid area, the middle of the partition plate is provided with a through hole, the through hole is connected with an L-shaped water guide pipe, and wastewater enters the electro-flocculation tank from the flocculation area to complete electro-flocculation and then enters the clear liquid area through the water guide pipe.
3. An electro-Fenton device for treating metal wastewater according to claim 2, wherein a slag scraper is arranged in the flocculation zone of the electro-flocculation tank, the slag scraper reciprocates left and right through an external driving mechanism, a scraper is arranged at the bottom of the slag scraper, the device further comprises a slag receiving groove fixedly arranged in the flocculation zone of the electro-flocculation tank, and the bottom of the slag receiving groove is communicated to a sludge tank through a pipeline.
4. An apparatus for electro-Fenton treatment of metal wastewater according to claim 2, wherein a first guide plate is installed in the flocculation zone of the electro-flocculation tank, and a bottom outlet of the first guide plate is communicated to a sludge tank through a pipeline.
5. An apparatus for electro-Fenton treatment of metal wastewater according to claim 2, wherein an aeration pipe is installed at the bottom of the clear liquid zone of the electro-flocculation tank, and the aeration pipe is connected with a compressed air source through an air pipe.
6. The electro-Fenton apparatus for treating metal wastewater according to claim 1, wherein the reaction sedimentation tank comprises a pH adjusting area, a flocculation area and a vertical sedimentation tank, the alkali dosing tank II and the flocculant dosing tank are respectively communicated with the pH adjusting area and the flocculation area, the pH adjusting area is provided with a third pH online detector, the pH adjusting area and the flocculation area are respectively provided with a rapid mixer and a slow mixer, a water outlet of the electro-Fenton reactor is connected with the pH adjusting area of the reaction sedimentation tank, the pH adjusting area is communicated with the flocculation area, and the flocculation area is communicated with the vertical sedimentation tank.
7. An electro-Fenton apparatus for treating metal wastewater according to claim 6, wherein a second flow guide plate is installed at the lower part of the vertical sedimentation tank, and a bottom outlet of the second flow guide plate is communicated with a sludge tank through a pipeline.
8. An apparatus for treating metal wastewater by electro-Fenton according to claim 1, wherein dosing pumps are installed at the outlet of the acid dosing tank, the alkali dosing tank I, the hydrogen peroxide dosing tank, the ferrous sulfate dosing tank, the alkali dosing tank II and the flocculant dosing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121785239.6U CN215403561U (en) | 2021-08-02 | 2021-08-02 | Device for treating metal wastewater by electro-Fenton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121785239.6U CN215403561U (en) | 2021-08-02 | 2021-08-02 | Device for treating metal wastewater by electro-Fenton |
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| Publication Number | Publication Date |
|---|---|
| CN215403561U true CN215403561U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121785239.6U Active CN215403561U (en) | 2021-08-02 | 2021-08-02 | Device for treating metal wastewater by electro-Fenton |
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| CN (1) | CN215403561U (en) |
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2021
- 2021-08-02 CN CN202121785239.6U patent/CN215403561U/en active Active
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