CN212222679U - Wastewater recycling treatment system based on flow electrode - Google Patents
Wastewater recycling treatment system based on flow electrode Download PDFInfo
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- CN212222679U CN212222679U CN202020301439.9U CN202020301439U CN212222679U CN 212222679 U CN212222679 U CN 212222679U CN 202020301439 U CN202020301439 U CN 202020301439U CN 212222679 U CN212222679 U CN 212222679U
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Abstract
The utility model discloses a waste water resourceful treatment system based on mobile electrode, including filter equipment, the intake chamber, S type mobile electrode electro-adsorption device and first automatic monitor, wherein the intake chamber, S type mobile electrode electro-adsorption device and first automatic monitor are linked into a return circuit, the external drainage pipe of first automatic monitor, waste water passes through S type mobile electrode electro-adsorption device and realizes the desorption of anion and cation electro-adsorption, through adopting the porous column of cylindric cavity with the mass flow body, mobile electrode liquid flow direction and waste water flow opposite direction, the design of retrieval and utilization insoluble substance in the electrode liquid, improve electro-adsorption rate and efficiency, the resource utilization is realized to the heavy metal ion of enrichment. The utility model discloses a wastewater treatment system reasonable in design, easy operation, use cost is low, and heavy metal ion desorption effect is stable, high-efficient in the waste water, guarantees discharge to reach standard.
Description
Technical Field
The utility model belongs to the technical field of environmental engineering and waste water treatment, concretely relates to waste water resourceful treatment system based on mobile electrode.
Background
The electro-adsorption technique is that positive and negative external voltages are applied to two opposite electrodes, and the anions and cations in the solution are adsorbed to the surface of the electrode containing opposite charges under the action of electric field force and stored in an electric double layer formed at the interface of the electrode and the solution, so as to achieve the effect of removing the anions and the cations. The electro-adsorption technology has low required voltage and low energy consumption, does not need chemical agents for electrode regeneration, and is an environment-friendly water treatment technology. Compared with the traditional fixed electrode electro-adsorption technology, the flowing electrode electro-adsorption technology has the advantages of long cycle life, continuous and quick adsorption-desorption, capability of realizing desalination of high-concentration salt water, high desalination efficiency and the like. Meanwhile, the anions and the cations enriched on the surface of the electrode can be recycled through subsequent treatment.
At present, the research of the electro-adsorption technology of the flowing electrode is in the starting stage, and the research reports at home and abroad are less. Patent publication No. CN106044970A discloses a method for desalination based on flow electrode capacitive deionization (FCDI) and application thereof, and patent publication No. CN110240240A discloses a device and method for enhancing the capacitive deionization performance of a flow electrode, but these two methods do not consider the problem of resource utilization of ions enriched in an electrode solution, nor consider the improvement of the desorption efficiency of ions from the viewpoint of structural optimization design of a flow electrode electro-adsorption system. Patent publication No. CN110372067A discloses a flow electrode and its application, which uses carbon black as an electro-adsorption material, and designs a flow circulation mode of the flow electrode. The patent does not consider the recycling of the electro-adsorbent material. In addition, the design of the wastewater treatment process should be provided with corresponding safeguard measures to ensure the stable standard-reaching discharge of the wastewater.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, provide a waste water resourceful treatment system based on mobile electrode.
In order to realize the technical purpose, the utility model discloses the technical scheme who takes does:
a flowing electrode based wastewater resourceful treatment system, wherein: the system comprises a filtering device, a water inlet pool, an S-shaped flowing electrode electric adsorption device and a first automatic monitor which are connected by a pipeline in sequence, wherein the water inlet pool, the S-shaped flowing electrode electric adsorption device and the first automatic monitor are connected into a loop, and the first automatic monitor is externally connected with a drainage pipeline;
the S-shaped flowing electrode electric adsorption device comprises an anode loop and a cathode loop, wherein the anode of the direct current power supply is connected with the anode loop, the cathode of the direct current power supply is connected with the cathode loop, a water treatment channel is formed between the anode loop and the cathode loop, anode flowing liquid flows in the anode loop in a circulating mode, and cathode flowing liquid flows in the cathode loop in a circulating mode;
the anode loop is connected with a first microfiltration device, the cathode loop is connected with a second microfiltration device, and the first microfiltration device and the second microfiltration device respectively filter the anode flowing liquid and the cathode flowing liquid;
the wastewater to be treated is filtered by the filtering device to obtain suspended matters, and then circularly flows in a loop formed by the water inlet pool, the S-shaped flowing electrode electro-adsorption device and the first automatic monitor, and when the ion content monitored by the first automatic monitor is lower than the standard, the wastewater is discharged.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the anode loop comprises an anode flowing electrode channel and an anode electrode liquid pool which are connected into a loop, wherein an anode current collector is arranged in the anode flowing electrode channel, an anion exchange membrane is attached to the inner side of the anode current collector, the anode flowing liquid flows in the anode current collector, and the anode electrode liquid pool is connected with a first microfiltration device;
the cathode loop comprises a cathode flowing electrode channel and a cathode electrode liquid pool which are connected into a loop, a cathode current collector is arranged in the cathode flowing electrode channel, a cation exchange membrane is attached to the inner side of the cathode current collector, the cathode flowing liquid flows in the cathode current collector, a second automatic monitor is arranged in the cathode electrode liquid pool, and the cathode electrode liquid pool is connected with a second microfiltration device;
the outer sides of the anode current collector and the cathode current collector are fixed by the supporting plate, the anode current collector is connected with the positive pole of the direct current power supply, and the cathode current collector is connected with the negative pole of the direct current power supply.
The anode current collector and the cathode current collector are both hollow porous columnar structures, the support plate is made of organic glass, and the voltage range of the direct current power supply is 0-10V.
The wastewater recycling treatment system based on the flow electrode further comprises a first valve, a second valve, a third valve and a fourth valve, wherein the first valve is installed between the first automatic monitor and the external drainage pipeline, the second valve is installed between the first automatic monitor and the water inlet pool, the third valve is installed between the anode electrode liquid pool and the first microfiltration device, and the fourth valve is installed between the cathode electrode liquid pool and the second microfiltration device.
The second microfiltration device is sequentially connected with a chelation reaction tank and a nanofiltration device, the chelation reaction tank is connected with a cathode flow tank, a mechanical stirring hand is arranged in the chelation reaction tank, the nanofiltration device filters liquid after chelation reaction, a heavy metal chelating agent and a pH regulator are added in the chelation reaction tank during chelation reaction, the heavy metal chelating agent is one or more of EDTA, NTA and HEDTA, and the pH regulator is 0.01mol/L hydrochloric acid and sodium hydroxide solution.
The anode flowing liquid and the cathode flowing liquid are both suspension liquid mixed by activated carbon, carbon black and sodium chloride solution, wherein the concentration of the activated carbon and the carbon black is 20-150g/L, the concentration of the sodium chloride is 1-10g/L, the flow rate of the flowing electrode liquid is 0.1-2mL/s, the flow rate of the waste water is 0.1-2mL/s, and the flowing directions of the anode flowing liquid and the cathode flowing liquid are opposite to the flowing direction of the waste water.
Heavy metal ions in the wastewater to be treated in the water inlet pool are lead ions, cadmium ions, manganese ions or iron ions, and the conductivity of the wastewater in the water inlet pool is 500-3000 mu s/cm.
The utility model has the advantages that:
the utility model discloses a waste water resourceful treatment system based on mobile electrode who adopts sets up the filtration cycle structure through rational arrangement, has improved ion desorption efficiency greatly, can realize retrieving the recycle to the filtrate simultaneously to and retrieve the resourceful utilization to the enrichment of the heavy metal ion that filters out in the waste water, the utility model discloses waste water treatment system reasonable in design, easy operation, use cost is low, and heavy metal ion desorption effect is stable in the waste water, high-efficient, guarantees discharge to reach standard simultaneously.
Drawings
FIG. 1 is an overall structure of the present invention;
FIG. 2 is a schematic diagram of a flow electrode electrosorption system.
The reference signs are: 100-filtering device, 110-water inlet tank, 120-first microfiltration device, 130-second microfiltration device, 140-nanofiltration device, 200-flowing electrode electric adsorption system, 210-water treatment channel, 220-anode current collector, 221-cathode current collector, 230-support plate, 240-anion exchange membrane, 241-cation exchange membrane, 250-anode flowing electrode channel, 251-cathode flowing electrode channel, 260-anode electrode liquid tank and 261-cathode electrode liquid tank. 300-first automatic monitor, 310-second automatic monitor, 400-first valve, 410-second valve, 420-third valve, 430-fourth valve, 500-chelating reaction cell.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in figure 1, the utility model relates to a waste water resourceful treatment system based on flowing electrode, wherein: the system comprises a direct-current power supply, a filtering device 100, a water inlet pool 110, an S-shaped flowing electrode electric adsorption device 200 and a first automatic monitor 300 which are sequentially connected through pipelines, wherein the water inlet pool 110, the S-shaped flowing electrode electric adsorption device 200 and the first automatic monitor 300 are connected into a loop, and the first automatic monitor 300 is externally connected with a drainage pipeline;
the S-shaped flowing electrode electro-adsorption device 200 comprises an anode loop and a cathode loop, wherein the anode of the direct current power supply is connected with the anode loop, the cathode of the direct current power supply is connected with the cathode loop, a water treatment channel 210 is formed between the anode loop and the cathode loop, anode flowing liquid flows in the anode loop in a circulating manner, and cathode flowing liquid flows in the cathode loop in a circulating manner;
the anode loop is connected with a first microfiltration device 120, the cathode loop is connected with a second microfiltration device 130, and the first microfiltration device 120 and the second microfiltration device 130 respectively filter the anode flowing liquid and the cathode flowing liquid;
the wastewater to be treated is filtered by suspended matters through the filtering device 100, then circularly flows in a loop formed by the water inlet pool 110, the S-shaped flowing electrode electro-adsorption device 200 and the first automatic monitor 300, and when the ion content monitored by the first automatic monitor 300 is lower than a standard, the wastewater is discharged.
In an embodiment, the anode loop includes an anode flowing electrode channel 250 and an anode electrode liquid pool 260 connected into a loop, an anode current collector 220 is disposed inside the anode flowing electrode channel 250, an anion exchange membrane 240 is attached to the inner side of the anode current collector 220, the anode flowing liquid flows in the anode current collector 220, and the anode electrode liquid pool 260 is connected to the first microfiltration device 120;
the cathode loop comprises a cathode flow electrode channel 251 and a cathode electrode liquid pool 261 which are connected into a loop, a cathode current collector 221 is arranged in the cathode flow electrode channel 251, a cation exchange membrane 241 is attached to the inner side of the cathode current collector 221, the cathode flow liquid flows in the cathode current collector 221, a second automatic monitor 310 is arranged in the cathode electrode liquid pool 261, and the cathode electrode liquid pool 261 is connected with a second microfiltration device 130;
the outer sides of the anode current collector 220 and the cathode current collector 221 are fixed by a support plate 230, the anode current collector 220 is connected with the anode of a direct current power supply, and the cathode current collector 221 is connected with the cathode of the direct current power supply.
In the embodiment, the anode current collector 220 and the cathode current collector 221 are both hollow and porous cylindrical structures, the supporting plate 230 is made of organic glass, and the voltage range of the dc power supply is 0-10V.
In an embodiment, the system further comprises a first valve 400, a second valve 410, a third valve 420 and a fourth valve 430, wherein the first valve 400 is installed between the first automatic monitor 300 and an external drainage pipeline, the second valve 410 is installed between the first automatic monitor 300 and the water inlet tank 110, the third valve 420 is installed between the anode electrode liquid tank 260 and the first microfiltration device 120, and the fourth valve 430 is installed between the cathode electrode liquid tank 261 and the second microfiltration device 130.
In the embodiment, the second microfiltration device 130 is sequentially connected with a chelation reaction tank 500 and a nanofiltration device 140, the chelation reaction tank 500 is connected with a cathode flow tank 261, a mechanical stirring hand is arranged in the chelation reaction tank 500, the nanofiltration device 140 filters liquid after chelation reaction, a heavy metal chelating agent and a pH regulator are added in the chelation reaction tank 500 during chelation reaction, the heavy metal chelating agent is one or more of EDTA, NTA and HEDTA, and the pH regulator is 0.01mol/L hydrochloric acid and sodium hydroxide solution.
In the embodiment, heavy metal ions in the wastewater to be treated in the water inlet tank 110 are lead ions, cadmium ions, manganese ions or iron ions, and the conductivity of the wastewater in the water inlet tank 110 is 500-3000 μ s/cm.
In the embodiment, the anode flowing liquid and the cathode flowing liquid are mixed suspension of activated carbon, carbon black and sodium chloride solution, wherein the concentration of the activated carbon and the carbon black is 20-150g/L, the concentration of the sodium chloride is 1-10g/L, the flow rate of the flowing electrode liquid is 0.1-2mL/s, the flow rate of the waste water is 0.1-2mL/s, and the flowing directions of the anode flowing liquid and the cathode flowing liquid are opposite to the flowing direction of the waste water.
The utility model relates to a waste water resourceful treatment system working process based on mobile electrode as follows:
respectively placing the prepared anode flowing liquid and cathode flowing liquid in an anode electrode liquid pool 260 and a cathode electrode liquid pool 261, so that the anode flowing liquid and the cathode flowing liquid respectively circulate in an anode loop and a cathode loop at constant speed;
the second valve 410 is opened, the wastewater is filtered by the filtering device 100 to flow circularly at a constant speed in a loop formed by the water inlet tank 110, the S-shaped flowing electrode electro-adsorption device 200 and the first automatic monitor 300, and the concentration of heavy metal ions in the wastewater is monitored in real time by the first automatic monitor 300;
starting a direct-current power supply, enabling cations in the wastewater to enter a cathode flow electrode channel 251 through a cation exchange membrane 241 under the action of an electric field force, enabling anions in the wastewater to enter an anode flow electrode channel 250 through an anion exchange membrane 240 under the action of the electric field force, simultaneously monitoring the content of heavy metal ions in the cathode flow liquid in real time by a second automatic monitor 310, and filtering out insoluble activated carbon and carbon black through a first microfiltration device 120 and a second microfiltration device 130 when the content of the heavy metal ions is higher than a threshold value;
when the content of the heavy metal ions is higher than the threshold value, stopping the anode flowing liquid and the cathode flowing liquid from circularly flowing in the anode loop and the cathode loop, opening a third valve 420 and a fourth valve 430, filtering out insoluble activated carbon and carbon black from the anode flowing liquid through a first microfiltration device 120, returning the filtered activated carbon and carbon black to the anode electrode liquid pool 260 for recycling, and adding the filtered activated carbon and carbon black into the cathode flowing pool for recycling; the cathode flowing liquid is filtered to remove insoluble activated carbon and carbon black through the second microfiltration device 130, then returns to the cathode electrode liquid pool 261 for recycling through a chelation reaction, and the filtered activated carbon and carbon black are added into the anode flowing pool for recycling; when the content of the heavy metal ions is lower than the threshold value, closing the third valve 420 and the fourth valve 430, and continuously circulating the anode flowing liquid and the cathode flowing liquid;
wherein, the cathode flowing liquid enters the chelating reaction tank 500 after being filtered by the second microfiltration device 130, and meanwhile, the heavy metal chelating agent and the pH regulator are added and stirred at a certain time and speed for a chelating reaction, and then the chelate is filtered by the nanofiltration device 140 and returned to the cathode electrode liquid tank 261 for recycling;
when the first automatic monitor 300 detects that the content of heavy metal ions in the wastewater is higher than a standard value, the first valve 400 is closed, the second valve 410 is opened, and the wastewater continues to flow circularly; when the first automatic monitor 300 detects that the content of heavy metal ions in the wastewater is lower than a standard value, the first valve 400 is opened, the second valve 410 is closed, and the wastewater is discharged through an external drainage pipeline.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides a waste water resourceful treatment system based on flowing electrode, includes DC power supply, its characterized in that: the system also comprises a filtering device (100), a water inlet pool (110), an S-shaped flowing electrode electric adsorption device (200) and a first automatic monitor (300) which are sequentially connected through pipelines, wherein the water inlet pool (110), the S-shaped flowing electrode electric adsorption device (200) and the first automatic monitor (300) are connected into a loop, and the first automatic monitor (300) is externally connected with a drainage pipeline;
the S-shaped flowing electrode electric adsorption device (200) comprises an anode loop and a cathode loop, wherein the anode of a direct current power supply is connected with the anode loop, the cathode of the direct current power supply is connected with the cathode loop, a water treatment channel (210) is formed between the anode loop and the cathode loop, anode flowing liquid flows in the anode loop in a circulating mode, and cathode flowing liquid flows in the cathode loop in a circulating mode;
the anode loop is connected with a first microfiltration device (120), the cathode loop is connected with a second microfiltration device (130), and the first microfiltration device (120) and the second microfiltration device (130) respectively filter the anode flowing liquid and the cathode flowing liquid;
the wastewater to be treated is filtered by a filtering device (100) to remove suspended matters, then circularly flows in a loop formed by a water inlet pool (110), an S-shaped flowing electrode electro-adsorption device (200) and a first automatic monitor (300), and when the ion content monitored by the first automatic monitor (300) is lower than a standard, the wastewater is discharged.
2. The flowing electrode-based wastewater recycling treatment system according to claim 1, wherein: the anode loop comprises an anode flowing electrode channel (250) and an anode electrode liquid pool (260) which are connected into a loop, wherein an anode current collector (220) is arranged in the anode flowing electrode channel (250), an anion exchange membrane (240) is attached to the inner side of the anode current collector (220), the anode flowing liquid flows in the anode current collector (220), and the anode electrode liquid pool (260) is connected with a first microfiltration device (120);
the cathode loop comprises a cathode flowing electrode channel (251) and a cathode electrode liquid pool (261) which are connected into a loop, a cathode current collector (221) is arranged in the cathode flowing electrode channel (251), a cation exchange membrane (241) is attached to the inner side of the cathode current collector (221), the cathode flowing liquid flows in the cathode current collector (221), a second automatic monitor (310) is arranged in the cathode electrode liquid pool (261), and the cathode electrode liquid pool (261) is connected with a second microfiltration device (130);
the outer sides of the anode current collector (220) and the cathode current collector (221) are fixed by a support plate (230), the anode current collector (220) is connected with the positive pole of a direct current power supply, and the cathode current collector (221) is connected with the negative pole of the direct current power supply.
3. The flowing electrode-based wastewater recycling treatment system according to claim 2, wherein: the anode current collector (220) and the cathode current collector (221) are both hollow porous columnar structures, the supporting plate (230) is made of organic glass, and the voltage range of the direct-current power supply is 0-10V.
4. The flowing electrode-based wastewater recycling treatment system according to claim 2, wherein: still include first valve (400), second valve (410), third valve (420), fourth valve (430), first valve (400) are installed between first automatic monitoring ware (300) and external drainage pipe, second valve (410) are installed between first automatic monitoring ware (300) and intake pond (110), third valve (420) are installed between anode electrode liquid pond (260) and first microfiltration device (120), fourth valve (430) are installed between cathode electrode liquid pond (261) and second microfiltration device (130).
5. The flowing electrode-based wastewater recycling treatment system according to claim 4, wherein: the second microfiltration device (130) is connected with a chelation reaction tank (500) and a nanofiltration device (140) in sequence, the chelation reaction tank (500) is connected with a cathode electrode liquid tank (261), a mechanical stirring hand is arranged in the chelation reaction tank (500), the nanofiltration device (140) filters liquid after chelation reaction, a heavy metal chelating agent and a pH regulator are added in the chelation reaction tank (500), the heavy metal chelating agent is one or more of EDTA, NTA and HEDTA, and the pH regulator is 0.01mol/L hydrochloric acid and sodium hydroxide solution.
6. The flowing electrode-based wastewater recycling treatment system according to claim 1, wherein: the anode flowing liquid and the cathode flowing liquid are both suspension liquid mixed by activated carbon, carbon black and sodium chloride solution, wherein the concentration of the activated carbon and the carbon black is 20-150g/L, the concentration of the sodium chloride is 1-10g/L, the flow rate of the flowing electrode liquid is 0.1-2mL/s, the flow rate of the waste water is 0.1-2mL/s, and the flowing directions of the anode flowing liquid and the cathode flowing liquid are opposite to the flowing direction of the waste water.
7. The flowing electrode-based wastewater recycling treatment system according to claim 6, wherein: heavy metal ions in the wastewater to be treated in the water inlet pool (110) are lead ions, cadmium ions, manganese ions or iron ions, and the conductivity of the wastewater in the water inlet pool (110) is 500-3000 mu s/cm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794415A (en) * | 2021-01-28 | 2021-05-14 | 重庆大学 | Capacitive deionization device and method for submerged flow electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794415A (en) * | 2021-01-28 | 2021-05-14 | 重庆大学 | Capacitive deionization device and method for submerged flow electrode |
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