CN107417016B - Advanced treatment system and method for cyanide-containing wastewater - Google Patents
Advanced treatment system and method for cyanide-containing wastewater Download PDFInfo
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- CN107417016B CN107417016B CN201710248578.2A CN201710248578A CN107417016B CN 107417016 B CN107417016 B CN 107417016B CN 201710248578 A CN201710248578 A CN 201710248578A CN 107417016 B CN107417016 B CN 107417016B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses a cyanide-containing wastewater advanced treatment system, which comprises a raw water tank, a primary packed bed electrolytic tank, a secondary packed bed electrolytic tank, a temporary storage tank, a precision filter and reverse osmosis water treatment equipment which are sequentially connected through pipelines, wherein a water inlet pump is arranged between the raw water tank and the primary packed bed electrolytic tank to pump wastewater in the raw water tank into the primary packed bed electrolytic tank, and a high-pressure pump is arranged between the temporary storage tank and the precision filter to pump wastewater in the temporary storage tank into the precision filter. The invention also discloses a method for deeply treating the cyanide-containing wastewater, and by adopting the system and the method for deeply treating the cyanide-containing wastewater, pollutants in the cyanide-containing wastewater can be thoroughly removed without adding chemical agents, the wastewater can be regenerated and reused in a production line under the reverse osmosis effect, metal resources can be recycled to a greater extent, water resource regeneration is realized, and the operation is safe, simple and convenient.
Description
Technical Field
The invention belongs to the field of sewage purification treatment, and particularly relates to a system and a method for advanced treatment of cyanide-containing wastewater.
Background
Industries such as electroplating, gold and silver ore mining, metal smelting and coking, pesticides and the like can generate cyanide-containing wastewater which is high in toxicity and can be discharged only after being strictly treated. The existing cyanide-containing wastewater treatment method can be divided into a purification method and a recovery regeneration method, wherein the purification method generally adopts an oxidant to oxidize and destroy cyanide-containing complex ions in the wastewater, and the purification method can be divided into an alkali chlorine oxidation method, a sulfur dioxide-air oxidation method, a hydrogen peroxide oxidation method, an ozonization method, an electrolytic oxidation method, a microbial oxidation method and the like according to the difference of the oxidant; the recovery and regeneration method includes an acidification method, an ion exchange resin method, an adsorption method, a solvent extraction method, a liquid membrane method, an electroosmosis method and the like. The cyanide-containing waste water has high toxicity, the recovery and regeneration method is difficult to popularize in consideration of operation safety factors, and the alkali chlorine oxidation method in the purification method has the advantages of thorough decomposition of cyanide, low treatment cost and the like, and is the most widely applied treatment method at present. However, the alkali chlorine oxidation method needs chemical agents such as sodium hypochlorite and the like, has secondary pollution, heavy peculiar smell and poor operation environment, and metal ions in the wastewater are generally removed in the form of heavy metal sludge, so that the metal ions are difficult to be recycled.
Disclosure of Invention
Aiming at the defects of the prior cyanide-containing wastewater treatment technology, the invention provides a system and a method for removing pollutants through a packed bed electrolytic cell and recycling wastewater through a reverse osmosis system.
In order to realize the aim, the invention discloses a cyanide-containing wastewater advanced treatment system, which comprises a raw water pool, a primary packed bed electrolytic tank, a secondary packed bed electrolytic tank, a temporary storage pool, a precision filter and reverse osmosis water treatment equipment which are sequentially connected through pipelines, wherein a water inlet pump is arranged between the raw water pool and the primary packed bed electrolytic tank to pump wastewater in the raw water pool into the primary packed bed electrolytic tank, a high-pressure pump is arranged between the temporary storage pool and the precision filter to pump wastewater in the temporary storage pool into the precision filter, and the filtering precision is 1-5 mu m.
The electrolytic bath of the first-stage packed bed and the electrolytic bath of the second-stage packed bed are cuboids, positive and negative flat plate electrodes are respectively arranged in the electrolytic bath of the first-stage packed bed and the electrolytic bath of the second-stage packed bed, power supplies are respectively arranged on the electrolytic bath of the first-stage packed bed and the electrolytic bath of the second-stage packed bed, and the positive and negative electrodes of the power supplies on the electrolytic bath of the first-stage packed bed and the electrolytic bath of the second-stage packed bed are respectively connected with the positive and negative flat plate electrodes of the electrolytic bath of the first-stage packed bed and.
The distances between the positive and negative plate electrodes of the first-stage packed bed electrolytic cell and the second-stage packed bed electrolytic cell are both 300-800mm, the plate electrodes of the first-stage packed bed electrolytic cell and the second-stage packed bed electrolytic cell have the heights of 300-1000mm, the widths of 60-600mm and the thicknesses of 10-30 mm.
The positive and negative plate electrodes of the first-stage packed bed electrolytic tank and the second-stage packed bed electrolytic tank are made of graphite, and the coconut shell granular activated carbon is filled between the positive and negative plate electrodes of the first-stage packed bed electrolytic tank and the second-stage packed bed electrolytic tank as a particle electrode. The graphite has large volume density, strong oxidation resistance, large allowable current density, high mechanical strength of the coconut shell granular activated carbon, stable physical property under the condition of high voltage and no powder falling.
The primary packed bed electrolytic tank and the secondary packed bed electrolytic tank form countless micro electric fields between particle electrodes in the electrified state, and the higher the electric field voltage is, the better the wastewater treatment effect is. However, the voltage increase is limited by the conductivity of the wastewater, the higher the conductivity of the wastewater, the smaller the voltage increase space. The invention selects a mode of adopting particle electrodes with different particle diameters to adjust the inter-polar distance, so that the waste water with high conductivity keeps larger inter-polar distance, and the waste water with low conductivity keeps smaller inter-polar distance, thereby avoiding the influence of bypass current and short-circuit current, effectively improving the voltage of an electric field and being beneficial to waste water treatment. Therefore, the particle diameter of the particle electrode in the first-stage packed bed electrolytic cell is 3-5mm, the specific surface area is greater than or equal to 1000 square meters per gram, and the mesoporosity is 50-70%. Mainly because the wastewater treated by the first-stage packed bed has relatively high concentration and large conductivity, and the particle electrode with large particle size is selected, the increase of the inter-electrode distance is beneficial to keeping higher working voltage and enhancing the wastewater treatment effect. The particle diameter of the particle electrode in the secondary packed bed electrolytic tank is 1-3mm, the specific surface area is greater than or equal to 1200 square meters per gram, and the mesoporosity is 50-70%, mainly because the concentration of the wastewater treated by the secondary packed bed electrolytic tank is relatively low, the conductivity is small, the particle electrode with small particle diameter is selected for increasing the contact probability of pollutants and the particle electrode, the inter-polar distance is reduced, but the short circuit is not easy to occur under the condition of applying higher working voltage, and the treatment effect of the wastewater with low concentration and the stability of the particle electrode are ensured.
The coconut shell granular activated carbon is supported by a porous supporting plate in a primary packed bed electrolytic tank and a secondary packed bed electrolytic tank, and an aeration device is arranged below the porous supporting plate.
The working voltage of the first-stage packed bed electrolytic tank is 40-200V, and the working electrode of the second-stage packed bed electrolytic tank is 60-200V.
The first-stage packed bed electrolytic tank adopts a direct-current power supply, and the second-stage packed bed electrolytic tank adopts a pulse power supply.
And a pipeline is arranged between the concentrated water side of the reverse osmosis water treatment equipment and the raw water tank, and the concentrated water generated by the reverse osmosis water treatment equipment flows into the raw water tank through the pipeline.
In the advanced cyanide-containing wastewater treatment system, the first overflow groove is arranged on the outer side of the upper part of the primary packed bed electrolytic tank, one end of a pipeline between the primary water tank and the primary packed bed electrolytic tank is connected with the primary water tank, and the other end of the pipeline is connected with the bottom of the primary packed bed electrolytic tank, so that wastewater in the primary water tank can be pumped into the bottom of the primary packed bed electrolytic tank and passes through the particle electrode bed layer from bottom to top, and the oxidative decomposition of organic matters, the cyanide breaking and the metal reduction are fully realized.
The waste water of the first-stage packed bed electrolytic tank overflows to the upper part of the second-stage packed bed electrolytic tank, flows through a particle electrode bed layer from top to bottom in the second-stage packed bed electrolytic tank, further removes organic matters, cyanides and metal ions, and then overflows to the temporary storage tank through the overflow groove communicated with the bottom of the second-stage packed bed electrolytic tank.
The invention also discloses a method for deeply treating cyanide-containing wastewater by adopting the treatment system, which comprises the following steps:
(1) pumping the cyanide-containing wastewater to be treated in the raw water tank into a primary packed bed electrolytic tank, wherein the working voltage range of the primary packed bed electrolytic tank is 40-200V, and the electrolysis time is 10-60 min;
(2) overflowing the wastewater treated by the primary packed bed electrolytic tank into a secondary packed bed electrolytic tank, wherein the working voltage range of the secondary packed bed electrolytic tank is 60-200V, and the electrolysis time is 10-20 min;
(3) the wastewater treated by the second-stage packed bed electrolytic tank overflows into a temporary storage tank;
(4) conveying the wastewater in the temporary storage tank to a precision filter through a high-pressure pump, wherein the filtering precision is 1-5 mu m;
(5) the outlet water of the precision filter enters reverse osmosis water treatment equipment, the produced pure water is conveyed to a production line, and reverse osmosis concentrated water flows into a raw water pool through a pipeline and enters a first-stage packed bed electrolytic tank together with cyanide-containing wastewater to be treated for treatment.
The invention discloses a cyanide-containing wastewater advanced treatment system and a method, which comprises a part for removing pollutants and filtering reclaimed water resources by an electrolytic method, wherein the electrolytic part adopts two-stage electrolysis, a first-stage packed bed electrolytic tank is used for treating raw water and concentrated water generated by reverse osmosis, a water inlet pump pumps a mixed solution of cyanide-containing wastewater to be treated and the concentrated water generated by reverse osmosis into the first-stage packed bed electrolytic tank, the mixed solution passes through a particle electrode bed layer from bottom to top to realize the oxidative decomposition, cyanide breaking and metal reduction of organic matters, then overflows from the upper part of the first-stage packed bed electrolytic tank to enter a second-stage packed bed electrolytic tank, flows through the particle electrode bed layer from top to bottom in the second-stage packed bed electrolytic tank to further remove organic matters, cyanides and metal ions, and then flows to a temporary storage. The filtering and regenerating part consists of two steps of precise filtering and reverse osmosis, the high pressure pump conveys the waste water in the temporary storage tank to the precise filter to complete primary filtering, and then the waste water enters the reverse osmosis water treatment equipment, the pure water obtained by reverse osmosis is reused in the production line, and the reverse osmosis concentrated water flows into the raw water tank.
Compared with the prior art, the invention has the following beneficial effects:
(1) the current efficiency is improved. According to the concentration characteristics of the cyanide-containing wastewater in each stage of electrolytic treatment, a direct current or pulse power supply and working voltage regulation are selected by using granular electrodes with different specifications and sizes, so that mass transfer and reaction are enhanced, the power consumption loss caused by concentration polarization and electrochemical polarization is reduced, and the aim of improving the current efficiency is fulfilled.
(2) Realizing the advanced treatment and recycling of the cyanide-containing wastewater. Through two-stage electrolysis, various pollutants in the cyanide-containing wastewater can be reduced to a lower level, and through reverse osmosis, wastewater regeneration can be realized and the wastewater can be reused in a production line.
(3) Realizing the enrichment and recovery of metal resources. By utilizing the porous characteristic and the electric adsorption effect of the particle electrode, most of metal can be enriched on the particle electrode, and then the recovery of metal resources can be realized through conventional processes such as acid washing, electrolysis and the like.
(4) By utilizing the system and the method, the pollutants in the cyanide-containing wastewater are thoroughly removed, no chemical agent is required to be added, the metal resources can be recovered to a greater extent, the regeneration of water resources is realized, and the operation is safe and simple.
Drawings
FIG. 1 is a schematic view of a system for advanced treatment of cyanide-containing wastewater according to example 1 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific examples.
Example 1:
the advanced cyanide-containing wastewater treatment system disclosed by the invention comprises a raw water tank 10, a primary packed bed electrolytic tank 20, a secondary packed bed electrolytic tank 30, a temporary storage tank 40, a precision filter 50 and reverse osmosis water treatment equipment 60 which are sequentially connected through pipelines, wherein power supplies 21 and 31 are respectively arranged on the primary packed bed electrolytic tank 20 and the secondary packed bed electrolytic tank 30, the primary packed bed electrolytic tank 20 adopts a direct-current power supply, and the secondary packed bed electrolytic tank 30 adopts a pulse power supply. A pipeline is arranged between the concentrated water side of the reverse osmosis water treatment device 60 and the raw water tank 10, and the concentrated water generated by the reverse osmosis water treatment device 60 flows into the raw water tank 10 through the pipeline and enters the first-stage packed bed electrolytic tank 20 together with the cyanide-containing wastewater to be treated for treatment. The primary packed bed electrolytic tank 20 and the secondary packed bed electrolytic tank 30 are cuboids, positive and negative flat plate electrodes are adopted for the positive and negative electrodes of the primary packed bed electrolytic tank 20 and the secondary packed bed electrolytic tank 30, the positive and negative flat plate electrodes 22 and 23 of the primary packed bed electrolytic tank 20 are respectively connected with the positive and negative electrodes of the power supply 21, and the positive and negative flat plate electrodes 32 and 33 of the secondary packed bed electrolytic tank 30 are respectively connected with the positive and negative electrodes of the power supply 31. The positive and negative plate electrodes of the first-stage packed bed electrolytic tank 20 and the second-stage packed bed electrolytic tank 30 are both made of high-power graphite, and the coconut shell granular activated carbon is filled between the positive and negative plate electrodes of the first-stage packed bed electrolytic tank 20 and the second-stage packed bed electrolytic tank 30 as a particle electrode.
The coconut shell particle activated carbon is supported by porous supporting plates 24 and 34 in a primary packed bed electrolytic tank 20 and a secondary packed bed electrolytic tank 30, and aeration devices 25 and 35 are respectively arranged below the porous supporting plates 24 and 34.
The first overflow groove 26 is arranged on the outer side of the upper part of the first-stage packed bed electrolytic tank 20, one end of a pipeline between the raw water tank 10 and the first-stage packed bed electrolytic tank 20 is connected with the raw water tank 10, the other end of the pipeline is connected with the bottom of the first-stage packed bed electrolytic tank 20, the outer side of the upper part of any one of the positive and negative flat plate electrodes 32 and 33 of the second-stage packed bed electrolytic tank 30 is provided with a second overflow groove 36, the second overflow groove 36 is communicated with the bottom of the second-stage packed bed electrolytic tank 30, one end of the pipeline between the first-stage packed bed electrolytic tank 20 and the second-stage packed bed electrolytic tank 30 is connected with the first overflow groove 26, and the other.
In order to make the wastewater in the advanced cyanide wastewater treatment system flow in each part, a water inlet pump 70 is arranged between the raw water tank 10 and the primary packed bed electrolytic tank 20 to pump the wastewater in the raw water tank into the bottom of the primary packed bed electrolytic tank 20, so that the wastewater can pass through a particle electrode bed layer from bottom to top to realize the oxidative decomposition of organic matters, the cyanide breaking and the metal reduction; the wastewater in the first-stage packed bed electrolytic tank 20 enters the upper part of the second-stage packed bed electrolytic tank 30 through the overflow groove, flows through the particle electrode bed layer from top to bottom in the second-stage packed bed electrolytic tank 30 to further remove organic matters, cyanides and metal ions, and then overflows to the temporary storage tank 40 through a second overflow groove 36 communicated with the bottom of the second-stage packed bed electrolytic tank 30. A high-pressure pump 80 is arranged between the temporary storage tank 40 and the precision filter 50 to pump the wastewater in the temporary storage tank 40 into the precision filter 50.
Example 2:
the advanced treatment system for cyanide-containing wastewater of this embodiment has the structure shown in embodiment 1, wherein positive and negative plate electrodes 22 and 23 are disposed in the first-stage packed bed electrolytic tank 20, the distance between the electrodes is 400mm, and the positive and negative plate electrodes 22 and 23 have a height of 800mm, a width of 300mm and a thickness of 20 mm. The particle diameter of the particle electrode in the first-stage packed bed electrolytic tank 20 is 3mm, the specific surface area is 1000 square meters per gram, and the mesopore ratio is 60 percent. The particle electrode layer height 700 mm. The design water treatment amount is 80-250L/h. The two-stage packed bed electrolytic tank 30 is internally provided with positive and negative flat plate electrodes 32 and 33 with the inter-electrode distance of 400mm, the height of the positive and negative flat plate electrodes 32 and 33 is 800mm, the width is 150mm, and the thickness is 20 mm. The particle diameter of the particle electrode in the secondary packed bed electrolytic tank 30 is 1mm, the specific surface area is 1200 square meters per gram, and the mesopore ratio is 70%. The particle electrode layer height 700 mm. The design water treatment amount is 80-250L/h.
Example 3:
the structure of the advanced treatment system for cyanide-containing wastewater of this embodiment is as in embodiment 1, wherein positive and negative plate electrodes 22 and 23 are disposed in the first-stage packed bed electrolytic tank 20, the inter-electrode distance is 600mm, and the plate electrodes 22 and 23 have a height of 300mm, a width of 60mm and a thickness of 10 mm. The particle diameter of the particle electrode in the first-stage packed bed electrolytic tank 20 is 5mm, the specific surface area is 1200 square meters per gram, and the mesopore ratio is 70%. The height of the particle electrode layer is 200 mm. The design water treatment amount is 7-42L/h. A pair of flat plate electrodes 32 and 33 are arranged in the secondary packed bed electrolytic tank 30, the distance between the electrodes is 600mm, the height of the positive and negative flat plate electrodes 32 and 33 is 300mm, the width is 60mm, and the thickness is 10 mm. The particle diameter of the particle electrode in the secondary packed bed electrolytic tank 30 is 1mm, the specific surface area is 1400 square meters per gram, and the mesopore ratio is 70%. The height of the particle electrode layer is 200 mm. The design water treatment amount is 7-42L/h.
Example 4:
the cyanogen-containing wastewater advanced treatment system of the embodiment 2 and the embodiment 3 is adopted to treat cyanogen-containing wastewater, and comprises the following steps:
(1) pumping cyanide-containing wastewater to be treated in a raw water tank 10 into a primary packed bed electrolytic tank 20, wherein the wastewater enters from the bottom 20 of the electrolytic tank and passes through a particle electrode bed layer from bottom to top, the working voltage range of the primary packed bed electrolytic tank 20 is 60V, the electrolysis time is 30min, after treatment, COD (chemical oxygen demand) in the wastewater is reduced to 186mg/L from 860mg/L, the concentration of copper ions is reduced to 17.7mg/L from 274mg/L, and cyanide is reduced to 20.1mg/L from 554 mg/L;
(2) the wastewater treated by the first-stage packed bed electrolytic tank 20 overflows into the upper part of a second-stage packed bed electrolytic tank 30 and flows through a particle electrode bed layer and the second-stage packed bed electrolytic tank 30 from top to bottom, the working voltage range is 90V, the electrolysis time is 15min, and COD (chemical oxygen demand), copper ions and cyanides of the treated effluent are lower than detection limits;
(3) the wastewater treated by the second-stage packed bed electrolytic tank 30 overflows into a temporary storage tank 40;
(4) conveying the wastewater in the temporary storage tank 40 to a precision filter 50 through a high-pressure pump 80, and passing through a fiber ball filtering layer from bottom to top, wherein the filtering precision is 1 mu m;
(5) the outlet water of the precision filter 50 enters a reverse osmosis water treatment device 60, pure water generated by a rolled reverse osmosis membrane is conveyed to a production line, and reverse osmosis concentrated water flows into the raw water tank 10 through a pipeline and enters the first-stage packed bed electrolytic tank 20 together with cyanide-containing wastewater to be treated for treatment.
By adopting the method in the embodiment, various pollutants in the cyanide-containing wastewater can be reduced to a lower level, and the wastewater can be regenerated and reused in a production line through reverse osmosis.
In summary, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a contain cyanogen advanced waste treatment system which characterized in that: the device comprises a raw water pool, a primary packed bed electrolytic tank, a secondary packed bed electrolytic tank, a temporary storage tank, a precision filter and reverse osmosis water treatment equipment which are sequentially connected through pipelines, wherein a water inlet pump is arranged between the raw water pool and the primary packed bed electrolytic tank to pump wastewater in the raw water pool into the primary packed bed electrolytic tank, a high-pressure pump is arranged between the temporary storage tank and the precision filter to pump wastewater in the temporary storage tank into the precision filter, the particle diameter of a particle electrode in the primary packed bed electrolytic tank is 3-5mm, the specific surface area is greater than or equal to 1000 square meters per gram, the mesoporosity is 50-70%, the particle diameter of a particle electrode in the secondary packed bed electrolytic tank is 1-3mm, the specific surface area is greater than or equal to 1200 square meters per gram, and the mesoporosity is 50-70%.
2. The advanced cyanide-containing wastewater treatment system according to claim 1, wherein: the first-stage packed bed electrolytic tank and the second-stage packed bed electrolytic tank are cuboids, and positive and negative flat plate electrodes are respectively arranged in the first-stage packed bed electrolytic tank and the second-stage packed bed electrolytic tank.
3. The advanced cyanide-containing wastewater treatment system according to claim 2, wherein: the distance between the positive and negative flat plate type electrodes of the first-stage packed bed electrolytic cell and the second-stage packed bed electrolytic cell is 800mm, the height of the positive and negative flat plate type electrodes of the first-stage packed bed electrolytic cell and the second-stage packed bed electrolytic cell is 1000mm, the width of the positive and negative flat plate type electrodes of the first-stage packed bed electrolytic cell and the second-stage packed bed electrolytic cell is 60-600mm, and the thickness of the positive and negative flat plate type electrodes of the first.
4. The advanced cyanide-containing wastewater treatment system according to claim 2, wherein: the positive and negative plate electrodes of the first-stage packed bed electrolytic tank and the second-stage packed bed electrolytic tank are made of graphite, and the coconut shell granular activated carbon is filled between the positive and negative plate electrodes of the first-stage packed bed electrolytic tank and the second-stage packed bed electrolytic tank as a particle electrode.
5. The advanced cyanide-containing wastewater treatment system according to claim 4, wherein: the coconut shell granular activated carbon is supported by a porous supporting plate in a primary packed bed electrolytic tank and a secondary packed bed electrolytic tank, and an aeration device is arranged below the porous supporting plate.
6. The advanced cyanide-containing wastewater treatment system according to claim 1, wherein: the working voltage of the first-stage packed bed electrolytic tank is 40-200V, and the working voltage of the second-stage packed bed electrolytic tank is 60-200V.
7. The advanced cyanide-containing wastewater treatment system according to claim 1, wherein: the first-stage packed bed electrolytic tank adopts a direct-current power supply, and the second-stage packed bed electrolytic tank adopts a pulse power supply.
8. The advanced cyanide-containing wastewater treatment system according to claim 1, wherein: and a pipeline is arranged between the concentrated water side of the reverse osmosis water treatment equipment and the raw water tank, and the concentrated water generated by the reverse osmosis water treatment equipment flows into the raw water tank through the pipeline.
9. A method for advanced treatment of cyanide-containing wastewater by using the treatment system of claim 1, characterized by comprising the steps of:
(1) pumping the cyanide-containing wastewater to be treated in the raw water tank into a primary packed bed electrolytic tank, wherein the working voltage range of the primary packed bed electrolytic tank is 40-200V, and the electrolysis time is 10-60 min;
(2) overflowing the wastewater treated by the primary packed bed electrolytic tank into a secondary packed bed electrolytic tank, wherein the working voltage range of the secondary packed bed electrolytic tank is 60-200V, and the electrolysis time is 10-20 min;
(3) the wastewater treated by the second-stage packed bed electrolytic tank overflows into a temporary storage tank;
(4) conveying the wastewater in the temporary storage tank to a precision filter through a high-pressure pump, wherein the filtering precision is 1-5 mu m;
(5) the outlet water of the precision filter enters reverse osmosis water treatment equipment, the produced pure water is conveyed to a production line, and reverse osmosis concentrated water flows into a raw water pool through a pipeline and enters a first-stage packed bed electrolytic tank together with cyanide-containing wastewater to be treated for treatment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201390683Y (en) * | 2009-04-17 | 2010-01-27 | 湖州森蓝环境工程有限公司 | Multistage electrolysis device for treating cyanide containing wastewater |
| CN101962214A (en) * | 2009-07-23 | 2011-02-02 | 江苏新河农用化工有限公司 | Method for treating cyanide-containing waste water |
| CN103058424A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Deep treatment method of synthetic rubber wastewater |
| CN104310538A (en) * | 2014-09-30 | 2015-01-28 | 陕西华陆化工环保有限公司 | Method for degrading COD in industrial wastewater by three-dimensional electrode |
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| AT512231B1 (en) * | 2011-11-15 | 2018-06-15 | Pro Aqua Diamantelektroden Produktion Gmbh & Co Kg | BATHING WATER AND METHOD OF MANUFACTURE |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201390683Y (en) * | 2009-04-17 | 2010-01-27 | 湖州森蓝环境工程有限公司 | Multistage electrolysis device for treating cyanide containing wastewater |
| CN101962214A (en) * | 2009-07-23 | 2011-02-02 | 江苏新河农用化工有限公司 | Method for treating cyanide-containing waste water |
| CN103058424A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Deep treatment method of synthetic rubber wastewater |
| CN104310538A (en) * | 2014-09-30 | 2015-01-28 | 陕西华陆化工环保有限公司 | Method for degrading COD in industrial wastewater by three-dimensional electrode |
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