CN113716656A - Method for efficiently recycling saline sewage through magnetic synergistic electrodialysis - Google Patents
Method for efficiently recycling saline sewage through magnetic synergistic electrodialysis Download PDFInfo
- Publication number
- CN113716656A CN113716656A CN202111103110.7A CN202111103110A CN113716656A CN 113716656 A CN113716656 A CN 113716656A CN 202111103110 A CN202111103110 A CN 202111103110A CN 113716656 A CN113716656 A CN 113716656A
- Authority
- CN
- China
- Prior art keywords
- chamber
- magnetic
- electrodialysis
- alkali
- acid
- 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.)
- Pending
Links
- 238000000909 electrodialysis Methods 0.000 title claims abstract description 50
- 239000010865 sewage Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 29
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 230000002195 synergetic effect Effects 0.000 title description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 150000002500 ions Chemical class 0.000 claims abstract description 35
- 239000003513 alkali Substances 0.000 claims abstract description 30
- 239000002253 acid Substances 0.000 claims abstract description 27
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 239000001257 hydrogen Substances 0.000 claims abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 10
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims abstract description 4
- 150000003839 salts Chemical class 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- 239000003011 anion exchange membrane Substances 0.000 claims description 10
- 238000005341 cation exchange Methods 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 8
- 238000005342 ion exchange Methods 0.000 claims description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- 229910001882 dioxygen Inorganic materials 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 238000011282 treatment Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 6
- 239000008213 purified water Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 35
- 150000001450 anions Chemical class 0.000 description 15
- 239000007789 gas Substances 0.000 description 13
- 238000005070 sampling Methods 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 150000001768 cations Chemical class 0.000 description 8
- 241000282414 Homo sapiens Species 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000013508 migration Methods 0.000 description 6
- 230000005012 migration Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229920000767 polyaniline Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004224 UV/Vis absorption spectrophotometry Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000007886 mutagenicity Effects 0.000 description 1
- 231100000299 mutagenicity Toxicity 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100001234 toxic pollutant Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- 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
- C02F1/46—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
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/484—Treatment of water, waste water, or sewage with magnetic or electric fields using electromagnets
-
- 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
- C02F1/46—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
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
- C02F2001/46185—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water only anodic or acidic water, e.g. for oxidizing or sterilizing
-
- 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
- C02F1/46—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
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
- C02F2001/4619—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water only cathodic or alkaline water, e.g. for reducing
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for efficiently recycling saline sewage through magnetic collaborative electrodialysis, which comprises the steps of introducing the saline sewage into a magnetic collaborative electrodialysis device, enriching ions in an acid chamber, an intermediate chamber and an alkali chamber towards inlets of various chambers under the action of an external magnetic field and an electric field, increasing the concentration of an ion solution at the inlets, forming a concentration difference on two sides of an ion exchange membrane due to different water flow directions of the intermediate chamber, the acid chamber and the alkali chamber, strengthening the exchange rate of the ions in the electrodialysis by using a concentration gradient, improving the quality of a product at an outlet, reducing the accumulation of the ions on the surface of the membrane, and finally producing five products of acid, alkali, hydrogen, oxygen and purified water with high quality and high purity; the method disclosed by the invention is simple and easy to operate, improves the transmembrane transfer efficiency of ions, reduces membrane damage, solves the problem of accumulation of ions due to the influence of concentration gradient in the electrodialysis process, improves the treatment effect of saline sewage, can be applied to industry on a large scale, and effectively shortens the process time of saline water recovery treatment.
Description
Technical Field
The invention belongs to the field of wastewater purification, and particularly relates to a method for efficiently recycling saline sewage through magnetic synergistic electrodialysis.
Background
Along with the continuous development of human society, water bodies are gradually polluted, and more toxic and harmful salt substances enter the water. The damage to the water body caused by the industrial development of human beings is huge, in particular to salt-containing sewage generated in the industries such as mining, metallurgy, chemical engineering, electroplating and electronic industry. Meanwhile, the water pollution brings great harm to human beings. In recent years, water pollution events are frequent, the salt-containing sewage quantity is increasing year by year, the salt-containing sewage has the characteristics of strong toxicity, carcinogenicity, mutagenicity, difficult degradation, easy enrichment, long-term persistence and the like, and the salt-containing sewage can enter a human body through the action of a food chain and is accumulated in the human body, so that various diseases and functional disorders are caused, and finally, the salt-containing sewage causes serious harm to the health of the human body.
The commonly used salt-containing sewage treatment technologies comprise: chemical precipitation, ion exchange, electrochemical, adsorption, biological, etc., but these treatments still have many drawbacks. Such as: the adsorption method has the problems of large investment, high operating cost, large sludge production amount, difficult stable standard discharge of treated water and the like. The electrochemical method does not need to add chemical reagents in the treatment process, thereby reducing the wastewater treatment cost, causing no secondary pollution, being particularly capable of successfully realizing the treatment and recovery of heavy metals in the wastewater and having better application prospect in the treatment of the saline wastewater; however, the method has the disadvantages that the ion concentration of the stock solution is reduced as the reaction proceeds and the resistivity is increased, so that the power consumption is increased, and thus the application of the electrolysis method in the treatment of low-concentration salt-containing sewage is limited. The electrodialysis method has the advantages of reliable technology, small occupied area, low operation cost and the like, is particularly suitable for treating the saline sewage with high ion concentration and low organic matter concentration, but is difficult to stably operate for a long time in practical application due to the great damage of the reaction process to the ion exchange membrane, and is usually used for primary desalination.
Patent CN103073096A discloses a device of electrified ion in electromagnetism collaborative electrodialysis processing waste water, and the main processing object is heavy metal waste water, and the migration of negative and positive ions to the plate electrode in the electrolysis pond is accelerated to magnetic field device in the processing procedure, and heavy metal ion enriches gradually in the plate electrode, and the ion is easy to appear piling up on exchange membrane simultaneously, has reduced the speed of ion exchange membrane exchange ion, influences the ion separation effect, and the gained result still is the waste salt not by the utilization of resources.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for efficiently recycling saline sewage by magnetic synergistic electrodialysis, which is characterized in that a magnetic field is added in an intermediate chamber to generate an adjustable magnetic field force to form a magnetic line of force in the intermediate chamber, and the stress migration direction of anions and cations in the saline sewage can be changed after the synergistic action of the electrodialysis, so that the anions and cations are enriched at a water inlet (the stress mechanism analysis of the anions and cations is shown in figure 4); lorentz force F borne by anions and cationsLuoAlways in the direction V of the ion movement speedFortuneVertical, the specific analysis is as follows:
(1) an intermediate chamber: saline sewage flows in from the lower end, the produced pure water flows out from the upper end, and the anions and cations in the middle chamber are subjected to water flow force FWater (W)Pointing in the direction of the outlet; the direction of the magnetic lines in the middle chamber is perpendicular to the plane and outwards (the magnetic line distribution diagram is shown in figure 5). The direction of the electric field force borne by anions in the saline sewage points to the positive electrode of the electrode, and the water flow acting force FWater (W)And the electric field force FElectric powerA resultant force is formed, and at the moment, the anions obtain a certain movement speed V under the action of the resultant forceFortuneMigrate towards the ion exchange membrane and accumulate on the surface of the membrane in a disordered way, so that the two sides of the membrane can not reach the ideal concentration difference, the ion exchange rate and effect are influenced, the service life of the membrane is damaged, and simultaneously the quality of alkali liquor and hydrogen products in the alkali chamber is influenced. After the magnetic field generator is applied, V is formed according to magnetic lines and anionsFortuneThe moving direction under the action can be determined by the left hand rule to judge the Lorentz force F borne by the anion in the areaLuoIn the direction of (1), the anion being subjected to FLuoAfter the action of (2) causes a deviation of the motion trajectory towardsThe water inlet close to one side of the anion exchange membrane migrates and is enriched, so that the retention time of anions in the middle chamber is prolonged, the concentration difference of two sides of the membrane is increased, and the ion exchange rate is improved; in a similar manner, the cation is subjected to FLuoMigrate and concentrate toward the water inlet near one side of the cation exchange membrane, and concentrate at FLuoUnder the action of the water pump, the concentration of anions and cations at the inlet is continuously enriched so that the concentration of the water inlet of the middle chamber is increased;
(2) anode compartment (acid compartment): dilute acid liquid flows in from the upper end close to one side of the membrane, the produced acid liquid flows out from the lower end close to one side of the electrode plate, and water flow acting force F borne by anions in the anode chamberWater (W)Pointing to the outlet direction, the direction of the electric field force points to the positive electrode of the electrode, and the water flow acting force FWater (W)And the electric field force FElectric powerA resultant force is formed, and at the moment, the anions obtain a certain movement speed V under the action of the resultant forceFortuneMoving towards an acid liquor outlet; the direction of the magnetic force lines of the anode chamber is vertical to the plane inwards; the anions being subjected to Lorentz forces F in this regionLuoDirecting to the positive plate to make the negative ions be enriched on the polar plate at the inlet so as to raise the concentration of solution ions at the inlet of the anode chamber;
(3) cathode compartment (alkaline compartment): dilute alkali liquor flows in from one side of the upper end close to the membrane, the produced alkali liquor flows out from one side of the lower end close to the electrode plate, and positive ions in the cathode chamber are subjected to water flow acting force FWater (W)Pointing in the direction of the outlet; the direction of the electric field force is directed to the cathode of the electrode, and the water flow acting force FWater (W)And the electric field force FElectric powerA resultant force is formed, and at the moment, the positive ions obtain a certain movement speed V under the action of the resultant forceFortuneMoving towards the alkali liquor outlet; the direction of magnetic force lines of the cathode chamber is vertical to the plane inwards; the cations being subjected to Lorentz forces F in this regionLuoDirected at the dilute base inlet and concentrated on the negative electrode plate.
Because the water flow direction of the middle chamber is different from that of the cathode chamber and the anode chamber, under the action of Lorentz force, the migration and enrichment of anions and cations at an inlet are realized, the retention time of the ions in the chamber is prolonged, the ions can form large concentration difference on two sides of the membrane in the whole course after the migration, the ion concentration of the solution at the inlet is higher than that of the solution at the outlet, the ion exchange rate is accelerated by utilizing the concentration gradient, the working time of the electrodialysis process is shortened, the quality of products at the outlet is improved, meanwhile, along with the promotion of the ion exchange rate, the accumulation of the ions on the surface of the membrane is greatly reduced, the loss to the membrane is reduced, and the service life of the membrane is effectively prolonged.
The magnetic field generator comprises a magnetic coil and magnetic field conducting plates, wherein the 2 magnetic field conducting plates are respectively arranged on the outer sides of the front wall and the rear wall of the middle chamber, and the magnetic coil is wound on the magnetic field conducting plates.
The cation exchange membrane and the anion exchange membrane in the magnetic collaborative electrodialysis device are conventional commercially available exchange membranes, and have good corrosion resistance, oxidation resistance and chemical stability, the Ion Exchange Capacity (IEC) is 1 mmol/g-2.8 mmol/g, the ion leakage rate is less than 11%, the ion migration number is higher than 0.9, and the desalination rate is more than 85%. The cathode electrode plate and the anode electrode plate have good electrochemical performance, corrosion resistance and cycling stability. The cathode is a hydrogen evolution electrode prepared by taking single metal lithium, beryllium, titanium, vanadium, molybdenum or alloy with higher HER catalytic activity as a material, the anode is CNTs, PANI, metal oxide or a composite material thereof, and the specific capacitance value is 100F/g-300F/g.
The magnetic-synergetic electrodialysis devices can be used independently or assembled in series to form a set, and when the magnetic-synergetic electrodialysis devices are connected in series, the outlet of the previous monomer device is connected with the inlet of the next monomer device after the monomer devices are sequentially placed. The component of the invention can be powered by a direct current power supply or pulse current, the magnetic induction intensity is 0.01T-10T, and the electric field intensity is 0.005-5V/m; the direction of the magnetic field and the intensity of the magnetic field can be regulated and controlled by changing the directions of the positive electrode and the negative electrode of the electrified current of the magnetoelectric coil and the magnitude of the current.
The invention has the following advantages:
1. according to the method for efficiently recycling the saline sewage through magnetic-electrodialysis cooperation, the adjustable magnetic field force is added in the middle chamber, so that the power performance is fundamentally enhanced, the transmembrane transfer efficiency of ions is improved, the membrane damage is reduced, the problem that the ions are accumulated due to the influence of concentration gradient in the electrodialysis process is solved, the influence of concentration difference on the migration rate of the ion electrodialysis is improved, the phenomenon of local ion enrichment is reduced, the problem of ion enrichment at a water outlet is effectively solved, the dosage of a medicament required in the traditional electrodialysis process is reduced, the residence time of the ions in the chamber is effectively prolonged, the residence time of the ions in the chamber of the electrodialysis device is prolonged, the treatment effect of the saline sewage is improved, and the quality of produced acid liquor, alkali liquor and pure water is favorably improved;
2. the magnetic-synergetic electrodialysis device can be used in series according to the amount of treated water, the implementation way and the operation method are simple and convenient, and the requirements on the number of auxiliary equipment and the volume of the equipment are greatly reduced, so that the problem that pathogenic microorganisms, toxic substances and pollutants in the sewage cannot be thoroughly treated can be solved while the low-cost and high-efficiency treatment of the salt-containing sewage is ensured, five products of acid, alkali, hydrogen, oxygen and purified water with economic efficiency are produced at one time, the harmlessness of the sewage, the cyclic utilization of water resources and the recycling of heavy metals are realized, and the economic benefit is improved;
3. the method aims at treating objects which are not limited to industrial waste salt-containing sewage, has wider treating objects, can be applied to industry in a large scale, realizes resource recycling of the salt-containing sewage, greatly improves the chemical reaction rate and reaction abundance, and effectively shortens the process time of salt water recycling treatment.
Drawings
FIG. 1 is a schematic view of the structure of a magnetic collaborative electrodialysis device according to the present invention;
FIG. 2 is a left side sectional view of the middle chamber of the apparatus of the present invention;
FIG. 3 is a schematic view of a partial front view of an external mechanism of a reaction chamber according to the present invention;
FIG. 4 is a schematic diagram of the method of the present invention;
FIG. 5 is a magnetic field line distribution diagram generated by the apparatus of the present invention;
FIG. 6 is a schematic view of a series arrangement of magnetic-electrodialysis devices;
in the figure: 1-a power supply; 2-a magnetic coil; 3-a magnetic field conducting plate; 4-an anode plate; 5-a cathode plate; 6-cation exchange membrane; 7-an anion exchange membrane; 8-acid chamber; 9-an alkali chamber; 10-dilute acid inlet; 11-a pure water outlet; 12-dilute alkali inlet; 13-an oxygen collection port; 14-acid production outlet; 15-saline sewage import; 16-an alkali production outlet; 17-a hydrogen gas collection port; 18-intermediate chamber.
Detailed Description
The present invention is further illustrated in detail by the following figures and examples, but the scope of the present invention is not limited thereto, and the electrode and the ion exchange membrane in the present example are all conventional commercially available products or products produced by a conventional method, unless otherwise specified.
Example 1: the method for treating the saline sewage of a certain mineral plant in Yunnan province by using the magnetic synergistic electrodialysis as a high-efficiency resource comprises the following specific contents:
as shown in fig. 1-3, the magnetic collaborative electrodialysis device includes a reaction chamber, a magnetic field generator, an anode plate 4, a cathode plate 5, a cation exchange membrane 6, an anion exchange membrane 7, and a power supply 1, wherein the cation exchange membrane 6 and the anion exchange membrane 7 are obliquely arranged in the reaction chamber to divide the reaction chamber into an acid chamber 8, a middle chamber 18, and an alkali chamber 9, the anode plate 4 and the cathode plate 5 are respectively arranged at the inner side walls of the acid chamber and the alkali chamber, the magnetic field generator includes a magnetic coil 2 and a magnetic field conductive plate 3, the 2 magnetic field conductive plates 3 are respectively arranged at the outer sides of the front and rear walls of the middle chamber 18, and the magnetic coil 2 is wound on the magnetic field conductive plate 3; the top of the acid chamber is provided with a dilute acid inlet 10 and an oxygen gas collecting port 13, the dilute acid inlet 10 is close to the cation exchange membrane 6, and the bottom is provided with an acid production outlet 14 and is close to the anode plate 4; the top of the alkali chamber is provided with a dilute alkali inlet 12 and a hydrogen gas collecting port 17, the dilute alkali inlet 12 is close to the anion exchange membrane 7, the bottom of the alkali chamber is provided with an alkali producing outlet 16 and is close to the cathode plate 5, and the power supply 1 is respectively connected with the anode plate 4, the cathode plate 5 and the magnetic field generator; the top of the middle chamber is provided with a pure water outlet 11, and the bottom is provided with a salt-containing sewage inlet 15; the magnetic field generator comprises a magnetic coil 2 and magnetic field conducting plates 3, wherein the magnetic field conducting plates 3 are respectively arranged on the outer sides of the front wall and the rear wall of the middle chamber, and the magnetic coil 2 is wound on the magnetic field conducting plates 3;
(1) taking 5000mL of saline sewage from a certain mineral plant in Yunnan, wherein the salt concentration is 160 mg/L; the inlet solution of the anode chamber is 0.5mol/L sulfuric acid, and the inlet solution of the cathode chamber is 0.7mol/L sodium hydroxide; the electrodialysis cathode adopts a 24cm x 24cm titanium-based tin system (Ti/Sb-SnO)2) An electrode (prepared by the method in the literature of 'preparation and performance research of electrode material for electrochemically treating organic wastewater'), and an anode of 24cm x 24cm aluminum magnesiumAlloy electrodes (available from first metal materials, ltd, guan); the two electrodes are opposite and the distance is 10.5 cm;
the capacity of the electrolytic cell is 30cm multiplied by 24cm, and a cathode chamber, an intermediate chamber and an anode chamber are formed by separating a PVDF ion exchange membrane; in the reaction process, the flow velocity of the solution in the three chambers is kept at 0.05m/s, the magnetic field generator is an iron core magnetic coil and is powered by a direct current power supply, and the electrodialysis adopts constant current for electrolysis;
(2) brine was treated with electrodialysis alone (control): turning on the power supply of the electrodialysis device at 2.5mA/cm2And respectively introducing solution into the cathode chamber, the intermediate chamber and the anode chamber under the current density condition, operating for 6 hours, sampling the solution at the solution outlet of the three chambers, and sampling gas at the gas collection ports of the anode chamber and the cathode chamber. The salt content removal rate of the middle chamber is 25.4 percent through the detection of a salinity meter, the oxygen production is 0.56L/h in the reaction process, and the hydrogen production is 0.84L/h. The concentrations of the solutions at the outlets of the anode chamber and the cathode chamber are respectively increased by 14.6 percent and 18.3 percent by adopting an ultraviolet visible absorption spectrometer;
(3) the magnetic synergistic electrodialysis device of the embodiment is turned on, the electricity is conducted for 30min, and when the magnetic induction intensity is 8T and the electric field intensity is 4.5V/m, the magnetic induction intensity is 2.5mA/cm2And respectively introducing solution into the cathode chamber, the intermediate chamber and the anode chamber under the current density condition, operating for 6 hours, sampling the solution at the solution outlet of the three chambers, and sampling gas at the gas collection ports of the anode chamber and the cathode chamber. The salt content removal rate of the middle chamber is 68.9 percent through the detection of a salinity meter, the oxygen production is 2.78L/h and the hydrogen production is 4.36L/h in the reaction process; the concentration of the solution at the outlet of the anode chamber and the cathode chamber is increased by 38.5 percent and 46.2 percent respectively by using an ultraviolet visible absorption spectrometer.
As can be seen from the comparison of the experimental step (2), the method has the advantages that the effect of the magnetoelectric synergistic treatment on the saline water is better in the same working time, the hydrogen and the oxygen can be efficiently produced, and the purpose of treating the saline water can be achieved without other medicaments.
Example 2: the structure of the device of the embodiment is the same as that of the embodiment 1, and the differences are as follows:
(1) taking 8000mL of saline sewage from a certain mineral factory in Yunnan, wherein the salt concentration is 230 mg/L; the inlet solution of the anode chamber is 0.6mol/L sulfuric acid, and the inlet solution of the cathode chamber is 0.8mol/L sodium hydroxide; the electrodialysis cathode adopts a 24cm x 24cm nickel-based alloy electrode (prepared by referring to the method in ' preparation of nickel-based composite plating and performance characterization '), and the anode is a 24cm x 24cm composite electrode adopting CNTs (prepared by referring to the method in ' preparation of polyaniline modified carbon-based flexible self-supporting supercapacitor electrode material and research on electrochemical performance); the two electrodes are opposite and the distance is 8.5 cm;
the capacity of the electrolytic cell is 30cm multiplied by 24cm, a polyethyleneimine anion exchange membrane and a polypyrrole coated modified cation exchange membrane (prepared by the method in the research on the modification of the high permselective ion exchange membrane) are adopted to divide the cell body into a cathode chamber, an intermediate chamber and an anode chamber; the flow rate of the solution in the three chambers is kept at 0.08m/s in the reaction process; the magnetic electric device is an iron core magnetic coil and is powered by a direct current power supply to provide a stabilized voltage power supply, and the electrodialysis adopts constant current for electrolysis;
(2) brine was treated with electrodialysis alone (control): turning on the power supply of the electrodialysis device at 3.5mA/cm2Respectively introducing solution into the cathode chamber, the intermediate chamber and the anode chamber under the current density condition, operating for 6 hours, sampling the solution at a solution outlet of the three chambers, and sampling gas at gas collection ports of the anode chamber and the cathode chamber; the salt content removal rate of the middle chamber is 27.7 percent through the detection of a salinity meter, the oxygen production is 0.63L/h and the hydrogen production is 0.89L/h in the reaction process; the concentrations of the solutions at the outlets of the anode chamber and the cathode chamber are respectively increased by 17.2 percent and 19.5 percent by adopting an ultraviolet visible absorption spectrometer;
(3) the magnetic synergistic electrodialysis device of the embodiment is turned on, the electricity is conducted for 30min, and when the magnetic induction intensity reaches 10T and the electric field intensity reaches 4.5V/m, the magnetic induction intensity is 3.5mA/cm2And respectively introducing solution into the cathode chamber, the intermediate chamber and the anode chamber under the current density condition, operating for 6 hours, sampling the solution at the solution outlet of the three chambers, and sampling gas at the gas collection ports of the anode chamber and the cathode chamber. The salt content removal rate of the middle chamber is 82.5 percent through the detection of a salinity meter, the oxygen production is 3.36L/h in the reaction process, and the hydrogen production is 4.90L/h. The concentrations of the solutions at the outlets of the anode chamber and the cathode chamber are respectively increased by 41.7 percent and 49.4 percent by adopting an ultraviolet visible absorption spectrometer;
as can be seen from the comparison of the experimental step (2), the method has the advantages that the effect of the magnetoelectric synergistic treatment on the saline water is better in the same working time, the hydrogen and the oxygen can be efficiently produced, and the purpose of treating the saline water can be achieved without other medicaments.
Example 3: the structure of the device of the embodiment is the same as that of the embodiment 1, and the differences are as follows:
(1) taking 10L of saline sewage from a certain mineral plant in Yunnan, wherein the salt concentration is 230mg/L, the anode chamber inlet solution is 0.6mol/L sulfuric acid, and the cathode chamber inlet solution is 0.8mol/L sodium hydroxide. The electrodialysis cathode adopts a 24cm x 24cm titanium-based tin system (Ti/Sb-SnO)2) An anode is a PANI electrode with the length of 24cm multiplied by 24 cm; the two electrodes are opposite and the distance is 8.5 cm;
the capacity of the electrolytic cell is 30cm multiplied by 24cm, a cathode chamber, a middle chamber and an anode chamber are formed by separating PVDF ion exchange membranes, the flow rates of solutions in the three chambers are all kept at 0.08m/s in the reaction process, a magnetoelectric device is an iron core magnetic coil and is supplied with power by a direct current power supply, and electrodialysis adopts constant current for electrolysis;
(2) the magnetic synergistic electrodialysis device of the embodiment is turned on, the electricity is conducted for 30min, and when the magnetic induction intensity reaches 10T and the electric field intensity reaches 4.5V/m, the magnetic induction intensity is 3.5mA/cm2And respectively introducing solution into the cathode chamber, the intermediate chamber and the anode chamber under the current density condition, operating for 6 hours, then sampling the solution at the solution outlet of the three chambers, and sampling gas at the gas collection ports of the anode chamber and the cathode chamber. Through detection of a salinity meter, the salt component removal rate of the middle chamber is 67.4%, oxygen is produced in 3.44L/h and hydrogen is produced in 4.95L/h in the reaction process, and the concentrations of solutions at the outlets of the anode chamber and the cathode chamber are respectively increased by 44.2% and 49.7% through measurement of an ultraviolet visible absorption spectrometer;
(3) performing circulating treatment by adopting a series connection equipment method, connecting the solution at the outlet treated by the magnetic synergistic electrodialysis device in the step (3) in series with the inlet of another magnetic synergistic electrodialysis device of the same type by adopting a composite hose with the diameter of 1.5cm and lined with fluoropolymer, and connecting the gas in series by adopting a silica gel hose with the diameter of 1.5 cm; treating for 3h by another magnetic collaborative electrodialysis device under the same condition, then sampling solution at an outlet of the three chambers of the other magnetic collaborative electrodialysis device, and sampling gas at gas collection ports of the anode chamber and the cathode chamber; the salt content removal rate of the middle chamber is 84.7 percent through the detection of a salinity meter, the oxygen production is 4.03L/h and the hydrogen production is 4.89L/h in the reaction process; the solution concentrations at the anode and cathode chamber outlets were increased by 48.7% and 51.6%, respectively, as measured by uv-vis absorption spectroscopy (fig. 6).
When the capacity of the treated saline sewage is overlarge, the effect of circulating the sewage by adopting a method of serially connecting equipment is better, the time required by the process can be shortened, and the sewage treatment efficiency is improved.
Claims (4)
1. A method for efficiently recycling saline sewage by magnetic collaborative electrodialysis is characterized by comprising the following steps: the method comprises the following steps of introducing the saline sewage into a magnetic collaborative electrodialysis device, wherein the magnetic collaborative electrodialysis device comprises a reaction cavity, magnetic field generators, an anode plate (4), a cathode plate (5), a cation exchange membrane (6), an anion exchange membrane (7) and a power supply, the cation exchange membrane (6) and the anion exchange membrane (7) are obliquely arranged in the reaction cavity, the reaction cavity is divided into an acid chamber, a middle chamber and an alkali chamber, the anode plate (4) and the cathode plate (5) are respectively arranged on the inner side walls of the acid chamber and the alkali chamber, 2 magnetic field generators are respectively arranged on the outer sides of the front wall and the rear wall of the middle chamber, the top of the acid chamber is provided with a dilute acid inlet (10) and an oxygen gas collecting port (13), the dilute acid inlet (10) is close to the cation exchange membrane (6), and the bottom of the acid production outlet (14) is arranged and is close to the anode plate (4); the top of the alkali chamber is provided with a dilute alkali inlet (12) and a hydrogen gas collection port (17), the dilute alkali inlet (12) is close to the anion exchange membrane (7), the bottom of the alkali chamber is provided with an alkali production outlet (16) and is close to the cathode plate (5), and a power supply is respectively connected with the anode plate (4), the cathode plate (5) and the magnetic field generator; the top of the middle chamber is provided with a pure water outlet (11), the bottom of the middle chamber is provided with a salt-containing sewage inlet (15), the salt-containing sewage enters the middle chamber from the salt-containing sewage inlet (15), under the action of an external magnetic field and an electric field, ions in the acid chamber, the middle chamber and the alkali chamber are enriched towards the inlets of the chambers, the concentration of an ion solution at the inlet is increased, because the water flow directions of the middle chamber, the acid chamber and the alkali chamber are different, the concentration difference is formed at two sides of an ion exchange membrane, the ion exchange rate in electrodialysis is enhanced by using concentration gradient, the quality of products at the outlet is improved, the accumulation of ions on the surface of the membrane is reduced, and finally, five products of acid, alkali, hydrogen, oxygen and pure water with high quality and high purity are produced.
2. The method for efficiently recycling saline sewage through magnetic collaborative electrodialysis according to claim 1, characterized by comprising the following steps: the magnetic field generator comprises a magnetic coil (2) and magnetic field conducting plates (3), wherein the 2 magnetic field conducting plates (3) are respectively arranged on the outer sides of the front wall and the rear wall of the middle chamber, and the magnetic coil (2) is wound on the magnetic field conducting plates (3).
3. The method for efficiently recycling saline sewage through magnetic collaborative electrodialysis according to claim 1, characterized by comprising the following steps: the magnetic induction intensity is 0.01T-10T, and the electric field intensity is 0.005-5V/m.
4. The method for efficiently recycling saline sewage through magnetic collaborative electrodialysis according to claim 1, characterized by comprising the following steps: more than one magnetic collaborative electrodialysis device is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103110.7A CN113716656A (en) | 2021-09-18 | 2021-09-18 | Method for efficiently recycling saline sewage through magnetic synergistic electrodialysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103110.7A CN113716656A (en) | 2021-09-18 | 2021-09-18 | Method for efficiently recycling saline sewage through magnetic synergistic electrodialysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113716656A true CN113716656A (en) | 2021-11-30 |
Family
ID=78684475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111103110.7A Pending CN113716656A (en) | 2021-09-18 | 2021-09-18 | Method for efficiently recycling saline sewage through magnetic synergistic electrodialysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113716656A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359857A (en) * | 2002-01-10 | 2002-07-24 | 陈树庆 | Process and apparatus for treating water by magneto-electric dialysis |
| DE10147842A1 (en) * | 2001-09-27 | 2003-04-24 | Karlsruhe Forschzent | Device for magnetically ordered electrode ionization |
| CN1769193A (en) * | 2005-09-12 | 2006-05-10 | 张贵清 | Electric deionisation method and apparatus for producing superpure water using separation bed |
| CN101638258A (en) * | 2008-08-03 | 2010-02-03 | 王科峰 | Water treatment method for ion membrane type electromagnetic force |
| CN102049192A (en) * | 2010-11-29 | 2011-05-11 | 南京大学 | Concentration difference dialysis device |
| CN103073096A (en) * | 2013-02-26 | 2013-05-01 | 昆明理工大学 | Device for processing charged ions in waste water through electromagnetism with electrodialysis |
| CN212151720U (en) * | 2019-12-31 | 2020-12-15 | 佛山市云米电器科技有限公司 | Water filtering and purifying system with water flows flowing in opposite directions and water purifier |
-
2021
- 2021-09-18 CN CN202111103110.7A patent/CN113716656A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10147842A1 (en) * | 2001-09-27 | 2003-04-24 | Karlsruhe Forschzent | Device for magnetically ordered electrode ionization |
| CN1359857A (en) * | 2002-01-10 | 2002-07-24 | 陈树庆 | Process and apparatus for treating water by magneto-electric dialysis |
| CN1769193A (en) * | 2005-09-12 | 2006-05-10 | 张贵清 | Electric deionisation method and apparatus for producing superpure water using separation bed |
| CN101638258A (en) * | 2008-08-03 | 2010-02-03 | 王科峰 | Water treatment method for ion membrane type electromagnetic force |
| CN102049192A (en) * | 2010-11-29 | 2011-05-11 | 南京大学 | Concentration difference dialysis device |
| CN103073096A (en) * | 2013-02-26 | 2013-05-01 | 昆明理工大学 | Device for processing charged ions in waste water through electromagnetism with electrodialysis |
| CN212151720U (en) * | 2019-12-31 | 2020-12-15 | 佛山市云米电器科技有限公司 | Water filtering and purifying system with water flows flowing in opposite directions and water purifier |
Non-Patent Citations (2)
| Title |
|---|
| 刘风学等: "《黄河下游复合污染物转化研究及监测评价》", 黄河水利出版社 * |
| 王兆熊等: "《化工环境保护和三废治理技术》", 30 April 1984, 化学工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Dong et al. | A combined microbial desalination cell and electrodialysis system for copper-containing wastewater treatment and high-salinity-water desalination | |
| CN100581640C (en) | Electro-deionization method and device for synchronously concentrating and purifying heavy metal wastewater | |
| CN2828014Y (en) | Electrochemical reactor | |
| CN114684981B (en) | Treatment method and system for wastewater containing heavy metals | |
| CN102603039A (en) | Coupling desalination method and device | |
| CN113072148B (en) | Device for treating and collecting charged metal ions in wastewater by utilizing uniform electromagnetic field | |
| CN102211801A (en) | Electrochemical reaction device and method for treating high-concentration organic wastewater | |
| CN202610083U (en) | Device for removing heavy metal from sludge in coupled film separating technology and electrokinetic technology | |
| Dermentzis et al. | An electrostatic shielding-based coupled electrodialysis/electrodeionization process for removal of cobalt ions from aqueous solutions | |
| CN103708585A (en) | Technology and device for removing heavy metal ions in electroplating wastewater | |
| CN108862489B (en) | Continuous electrode spacing adjusting type desalting technology for electric adsorption-regeneration and reaction module | |
| CN103265094A (en) | Method for recycling nitric acid and copper from waste water generated in production of printed circuit board | |
| CN109574151B (en) | Method for continuous low-energy-consumption desalting by using material electrochemistry and application thereof | |
| CN106608696A (en) | Method for selectively separating heavy metal ions based on EDI and complexing agent | |
| CN111875007A (en) | Anti-scaling electric adsorption system suitable for high-hardness wastewater | |
| CN107662965A (en) | A kind of electrolysis unit and method for removing ammonia nitrogen in ammonia alkali waste water | |
| CN113716656A (en) | Method for efficiently recycling saline sewage through magnetic synergistic electrodialysis | |
| CN203382824U (en) | Device for recovering refined copper from low-copper-content wastewater | |
| CN115974327A (en) | Nickel recovery system and process for nickel plating wastewater | |
| CN210559900U (en) | Chemical nickel waste water electrocatalytic oxidation treatment system | |
| CN212174544U (en) | Membrane-free electric deionization device with current perpendicular to water flow direction | |
| CN102079559B (en) | Electrical deionization method and system without enriched chamber | |
| CN103787467A (en) | Equipment and process for treating nickel-cobalt wastewater in hydrometallurgy industry through electrolytic method | |
| CN103833110A (en) | Device for treating nickel-cobalt sewage in the hydrometallurgy industry by electrolytic method | |
| CN111320243A (en) | Membrane-free electrodeionization method and device with current perpendicular to water flow direction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |