CN108128854B - Method and device for recycling saline water based on corona discharge coupling electrodialysis - Google Patents
Method and device for recycling saline water based on corona discharge coupling electrodialysis Download PDFInfo
- Publication number
- CN108128854B CN108128854B CN201810047155.9A CN201810047155A CN108128854B CN 108128854 B CN108128854 B CN 108128854B CN 201810047155 A CN201810047155 A CN 201810047155A CN 108128854 B CN108128854 B CN 108128854B
- Authority
- CN
- China
- Prior art keywords
- electrode
- electrodialysis
- power supply
- capacitance
- atomizing nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/422—Electrodialysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/44—Ion-selective electrodialysis
- B01D61/46—Apparatus therefor
- B01D61/48—Apparatus therefor having one or more compartments filled with ion-exchange material, e.g. electrodeionisation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/14—Alkali metal compounds
- C25B1/16—Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/22—Inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Water Supply & Treatment (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Urology & Nephrology (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a method for recycling salt-containing water based on corona discharge coupling electrodialysis, which comprises the steps of introducing salt-containing water into a Venturi atomizing nozzle electrode, introducing the salt-containing water into a capacitance system after being atomized and charged in the Venturi atomizing nozzle electrode, intercepting and discharging negatively charged colloid by a filter membrane in the capacitance system, wherein positively charged ions and negatively charged ions respectively move to the negative electrode and the positive electrode under the action of the negative electrode and the positive electrode of the capacitance system through the filter membrane, and migrate to an electrodialysis system arranged at the lower end of the capacitance system, anions penetrate through an anion exchange membrane of the electrodialysis system to enter an anode chamber, cations penetrate through the cation exchange membrane to enter a cathode chamber, generating alkali and hydrogen in the cathode chamber of the electrodialysis, and collecting; acid and oxygen are generated in an anode chamber of electrodialysis, and the acid is collected; meanwhile, ultrapure water is obtained, and finally, acid and alkali preparation of the brine is realized; the method and the device are simple and effective, and are suitable for industrial application and popularization.
Description
Technical Field
The invention belongs to the field of saline water treatment recycling, and particularly relates to a method and a device for producing ultrapure water and acid and alkali and recycling hydrogen by using saline water through corona discharge, capacitance, membrane filtration and electrodialysis technologies.
Background
With the vigorous development of the industry in China, a great amount of brine is produced each year, especially in the industries of coal chemical industry, petrochemical industry, electric power, metallurgy and the like, the brine generally refers to the brine with the mass fraction of Total Dissolved Solids (TDS) of at least 3.5%, and the brine contains a great amount of SO 4 2- 、NO 3 - 、Cl - 、Mg 2+ 、Ca 2+ 、Na + Plasma, and contains organic contaminants. At present, most of the brine is discharged through dilution and discharge, but the total amount of pollutants is not reduced, more fresh water resources and salt resources are wasted, and the effective treatment of the brine becomes a non-negligible problem in environmental treatment under the large environment with scarce water resources, and the seawater also belongs to the brine.
The water contains more or less organic matters, the brine cannot be simply subjected to biochemical treatment, the post-materialization process is complex, the treatment cost is high, and although the water is harmful, the water contains a large amount of salt resources, and the brine resources become the brine treatment trend, such as water recycling, salt crystallization and acid and alkali preparation.
Chinese patent CN103910457A is prepared by softening, multi-medium filtering, ultra-filtering, reverse osmosis, ion exchange, nano-filtering high-pressure reverse osmosis, evaporating, refining and other processes to obtain salt from salt-containing water, and the process is complicated to obtain refined salt, so that the operation cost is increased in order to obtain high concentration multiple, and meanwhile, the production period of salt products is long and the cost is too high. In the production process of enterprises producing salt-containing wastewater, acid and alkali are often needed, chinese patent CN105271481A utilizes a bipolar membrane technology to treat salt-containing water in an electrolytic tank and convert salts into corresponding acid and alkali for recovery, but the method has great dependence on water quality, and if the salt-containing water contains organic matters of colloid particles and macromolecules, the membrane is easy to be polluted, and the treatment effect is affected.
The membrane technology is a high-efficiency low-consumption separation technology, can realize recycling by enrichment and concentration, can reduce secondary pollution compared with the conventional water treatment technology, and is a novel environment-friendly technology. Membrane filtration and electrodialysis are used for treating salt-containing water, colloid and organic matters in the salt-containing water pollute the membrane, the filtration flux of the filter membrane is reduced, the mass transfer process of the electrodialysis membrane is also influenced, the treatment effect is reduced, the colloid and the organic matters cannot be well removed by the common filtration technology, and meanwhile, the ion selectivity of the ion exchange membrane for electrodialysis is not 100%, so that the ion permeation of the same name can occur.
The discharge plasma generated in the high-voltage discharge process contains strong oxidizing substances such as hydroxyl groups, oxygen atoms, ozone and the like with strong oxidizing property, can react with various substances, is widely used in saline water treatment, and can strengthen the charge of negatively charged colloid particles and increase the charge-mass ratio of the negatively charged colloid particles. However, the strong oxidizing substances in the discharge plasma have short service life and can only act on the surface of the saline water, and the pollutants in the water to be treated cannot be directly contacted with the strong oxidizing substances, so that the treatment capacity of the strong oxidizing substances is reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a method for recycling saline water based on corona discharge coupling electrodialysis, namely a method for producing ultrapure water and acid and alkali by using the saline water through high-voltage direct-current corona discharge, capacitance, membrane filtration and electrodialysis technology and recovering hydrogen.
Introducing saline water into a Venturi atomizing nozzle electrode, wherein a discharge electrode is arranged in the Venturi atomizing nozzle electrode, the Venturi atomizing nozzle electrode and the discharge electrode are respectively connected with the anode and the cathode of a direct-current high-voltage power supply, the saline water is atomized and charged in the Venturi atomizing nozzle electrode and then introduced into a capacitance system, negatively charged colloid is intercepted and discharged by a filter membrane in the capacitance system, the saline water passing through the filter membrane moves to the anode and the cathode respectively under the action of the anode and the cathode of the capacitance system and migrates into an electrodialysis system arranged at the lower end of the capacitance system, anions penetrate through an anion exchange membrane of the electrodialysis system to enter an anode chamber, cations penetrate through the cation exchange membrane to enter a cathode chamber, alkali and hydrogen are generated in the cathode chamber of electrodialysis, and collection is performed; acid and oxygen are generated in an anode chamber of electrodialysis, and the acid is collected; meanwhile, ultrapure water is obtained, and finally, the recycling of the brine is realized.
The brine comprises brine wastewater, brine organic wastewater, brine sewage and seawater.
The specific mechanism is as follows: the saline water is atomized and charged through the Venturi atomizing nozzle electrode under the action of a negative high-voltage direct current power supply, colloid in the saline water has negative charge, the charge quantity of the saline water is enhanced under the action of the negative high-voltage direct current power supply, the charge-to-mass ratio of the saline water is increased, so that condensation occurs, the saline water passes through the Venturi atomizing nozzle electrode, strong oxidizing substances such as hydroxyl free radicals, oxygen atoms and ozone are generated under the action of the high-voltage direct current power supply, water to be treated passes through the discharge electrode with the highest concentration of the strong oxidizing substances, the probability of the strong oxidizing substances on the action of pollutants in water is greatly increased, and the effect of the strong oxidizing substances on the action of the pollutants in water is enhanced. The charged salt-containing water passes through a capacitor system connected to a direct-current power supply, and under the action of electrophoresis, particles with positive charges and negative charges in the salt-containing water gradually move to the negative electrode and the positive electrode of the capacitor system respectively, anions and cations in the salt-containing water are separated and enriched, and a filter membrane in the capacitor system intercepts and eliminates the aggregated negatively charged colloid; the salt-containing water enters an electrodialysis system, anions and part of water penetrate an anion exchange membrane to enter an anode chamber under the action of voltage, corresponding acid and oxygen are generated in the anode chamber of electrodialysis, the cation exchange membrane at the lower end of the anode chamber inhibits acid extravasation, the obtained acid is collected, the oxygen is upwards diffused into the whole device to generate an aeration effect, the ultrafiltration membrane is reversely flushed, membrane pollution is reduced, meanwhile, corona discharge enables the oxygen to be changed into strong oxidizing substances such as ozone, hydroxyl free radicals and the like, and the capability of oxidizing organic matters of the device is improved; cation and part of water enter a cathode chamber through a cation exchange membrane, corresponding alkali and hydrogen are generated in the cathode chamber of electrodialysis, and are recovered, and the anion exchange membrane at the lower end of the cathode chamber inhibits alkali extravasation, so that the obtained ultrapure water flows out.
The venturi atomizing nozzle electrode is a venturi tube or is formed by sequentially connecting a hollow cylindrical section, a hollow conical converging section and a venturi tube, wherein one end of the venturi atomizing nozzle electrode is a water inlet, and the other end of the venturi atomizing nozzle electrode is a water outlet; the discharge electrode is wire-shaped, hole-shaped or needle-shaped, and the voltage of the direct current high-voltage power supply is-40 KV to-1 KV.
Pure oxygen or air is introduced from the Venturi atomizing nozzle electrode along the direction perpendicular to the water flow, and the volume ratio of the pure oxygen or air to the gas-liquid containing salt water is 0.1-10.
The capacitor system is a chamber with positive and negative electrodes arranged in parallel, a filter membrane arranged in the chamber divides the chamber into an upper chamber and a lower chamber, the bottom end of the upper chamber is provided with a discharge outlet, a power supply connected with the positive and negative electrodes is a direct current power supply or a pulse direct current power supply, the voltage of the power supply is 0.5-60V, the positive electrode of the capacitor system is a copper electrode, a platinum electrode, a diamond electrode or a boron-doped diamond electrode, and the negative electrode is a copper electrode, a platinum electrode, a diamond electrode or a boron-doped diamond electrode.
The filter membrane has tensile mechanical strength of more than 20MPa and pore diameter of less than 0.1 mu m.
The electrodialysis system is a cross electrodialysis system, the power supply of the electrodialysis system is a direct current power supply, an alternating current power supply or a pulse current power supply, the voltage is 2V-36V, the anion exchange membrane and the cation exchange membrane are arranged in the electrodialysis chamber in a crossing mode and divide the electrodialysis chamber into 4 parts, the electrodialysis system comprises a cathode chamber and an anode chamber, the cathode in the electrodialysis system is a stainless steel electrode, a copper electrode, a platinum electrode or a graphite electrode, and the anode is a platinum electrode, a titanium ruthenium electrode or a titanium iridium electrode.
The invention further aims to provide a device for producing ultrapure water, acid and alkali and collecting hydrogen simultaneously by using saline water, which comprises a direct-current high-voltage power supply, a discharge electrode, a Venturi atomizing nozzle electrode, a capacitance system, an electrodialysis system, a capacitance power supply and an electrodialysis power supply; the center of the Venturi atomizing nozzle electrode is provided with a discharge electrode, the Venturi atomizing nozzle electrode and the discharge electrode are respectively connected with the positive electrode and the negative electrode of a direct-current high-voltage power supply, the direct-current high-voltage power supply is connected with a grounding wire, the water outlet of the Venturi atomizing nozzle electrode is communicated with a capacitance system, the capacitance system is a cavity provided with positive and negative electrode plates in parallel, a filter membrane arranged in the cavity divides the cavity into an upper cavity and a lower cavity, the filter membrane is positioned between the positive electrode and the negative electrode of the capacitance, the bottom end of the upper cavity is provided with a discharge outlet, the capacitance power supply is connected with the positive electrode and the negative electrode of the capacitance, the bottom of the opening of the capacitance system is communicated with the inlet of the electrodialysis system, an anion exchange membrane and a cation exchange membrane are arranged in the electrodialysis cavity in a crossing manner and divide the cavity into 4 parts, namely a cathode chamber, an anode chamber, an liquid inlet chamber and a liquid outlet chamber, and an anion exchange membrane are connected with the crossing position of the cation exchange membrane through an insulating bayonet, the bottom of the anode chamber is provided with an acid liquor collecting port, an alkali liquor collecting port and a hydrogen collecting port are respectively connected with the electrodialysis anode and the electrodialysis cathode in the electrodialysis chamber.
The venturi atomizing nozzle electrode is provided with a gas inlet along the direction perpendicular to the water flow.
The venturi atomizing nozzle electrode is externally provided with an insulating pipe sleeve, and the capacitor system and the electrodialysis system are externally provided with insulating shells.
The exhaust port, the gas inlet, the alkali liquor collecting port and the acid liquor collecting port are provided with valves.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention couples the anion and cation screening and the cross electrodialysis technology through high-voltage corona discharge, membrane filtration and capacitance screening, and finally recycles the salt-containing water to produce ultrapure water, corresponding acid and alkali, and simultaneously recovers hydrogen to change waste into valuable;
2. the negative high-voltage corona discharge of the Venturi atomizing nozzle can effectively increase the charge-to-mass ratio of colloid, is easier to screen under the action of capacitance, and simultaneously generates strong oxidants such as ozone, hydroxyl free radicals and the like in the discharge process, thereby being beneficial to further reducing the content of organic matters in saline water, reducing the treatment load of an ultrafiltration membrane and an electrodialysis membrane and reducing membrane pollution, and further improving the treatment capacity of the whole device;
3. the capacitance system separates the anion and cation sieves in the brine in advance through electrophoresis, and when the brine enters the cross electrodialysis system, the selectivity of the anion and cation exchange membrane is improved, and the counter ions are prevented from penetrating through the exchange membrane;
4. in the process of cross electrodialysis brine, hydrogen is generated in a cathode chamber, the hydrogen is collected, recycling is realized, oxygen generated in an anode chamber permeates an anion exchange membrane, aeration is realized in the whole device, a filter membrane can be flushed, membrane pollution is reduced, meanwhile, the oxygen rises to the top of the device, corona discharge enables the oxygen to be changed into strong oxidizing substances such as ozone, hydroxyl free radicals and the like, the oxidizing property of the whole device is improved, and the pollution of organic matters to the membrane is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
FIG. 2 is a schematic diagram of a discharge electrode structure;
FIG. 3 is a schematic view of a venturi atomizing nozzle electrode structure;
1-a direct current high voltage power supply in the figure; 2-a ground wire; 3-a discharge electrode; 4-a venturi atomizing nozzle electrode; 5-insulating tube sleeve; 6-insulating housing; 7-filtering membrane; 8-a filter membrane bracket; 9-an outlet; 10-gas inlet; 11-a capacitance anode; 12-a capacitor negative electrode; 13-capacitive power supply; 14-insulating bayonet; 15-a hydrogen collection port; 16-electrodialysis anodes; 17-electrodialysis cathodes; 18-an electrodialysis power supply; 19-cation exchange membrane; 20-an anion exchange membrane; 21-an alkali liquor collection port; 22-an acid liquor collecting port; 23-cathode chamber; 24-anode chamber; 25-a liquid inlet chamber; 26-a liquid outlet chamber; 27-a hollow cylindrical section; 28-a hollow cone convergence section; 29-throat;
in fig. 2, a is a wire discharge electrode, b is a hole discharge electrode, and c is a needle discharge electrode.
Detailed Description
The technical solution of the present invention will be further described with reference to the specific embodiments, but the scope of the present invention is not limited to the above description.
Example 1: the method comprises the steps of recycling saline water (containing sodium sulfate 200g/L and COD 180 mg/L), wherein specific parameters are as follows, corona voltage is-25 KV, needle-shaped electrodes are adopted as discharge electrodes, direct-current voltage connected with a capacitance system is 40V, copper electrodes are adopted as electrodes of the capacitance, PE ultrafiltration membranes with tensile strength of 30MPa and aperture of 0.01 mu m are adopted as filter membranes, direct-current power supply voltage connected with cross electrodialysis is 24V, stainless steel electrodes are adopted as cathodes of the cross electrodialysis, and titanium ruthenium-coated electrodes are adopted as anodes.
The method comprises the steps of connecting a Venturi atomizing nozzle electrode and a discharge electrode with a positive electrode and a negative electrode of a direct-current high-voltage power supply respectively, opening the discharge electrode in the Venturi atomizing nozzle electrode, opening the direct-current high-voltage power supply, setting the voltage to be-25 KV, simultaneously, opening a capacitor power supply and an electrodialysis power supply to be respectively regulated to 40V and 24V, introducing salt-containing water into the Venturi atomizing nozzle electrode, atomizing and charging the salt-containing water in the Venturi atomizing nozzle electrode, introducing the salt-containing water into a capacitor system, intercepting and discharging negatively charged colloid by a PE ultrafiltration membrane in the capacitor system, and allowing the salt-containing water passing through the PE ultrafiltration membrane to flow under the action of the negative electrode and the positive electrode of the capacitor system, wherein positively charged ions and negatively charged ions respectively move to the negative electrode and the positive electrode and are discharged into an electrodialysis system arranged at the lower end of the capacitor system, allowing anions to enter an anode chamber through the anion exchange membrane under the action of the electrodialysis direct-current power supply, allowing cations to enter the anode chamber through the cation exchange membrane, generating sodium hydroxide and hydrogen in the cathode chamber of electrodialysis, collecting the sodium hydroxide and sulfuric acid and oxygen in the anode chamber of the electrodialysis, and allowing the acid to flow out of the obtained ultrapure water at the same time, and finally realizing recycling resources of the salt-containing water.
As shown in fig. 1-3, the device for completing the method comprises a direct-current high-voltage power supply 1, a discharge electrode 3, a venturi atomizing nozzle electrode 4, a capacitance system, an electrodialysis system, a capacitance power supply 13 and an electrodialysis power supply 18; the venturi atomizing nozzle electrode is formed by sequentially connecting a hollow cylindrical section 27, a hollow conical converging section 28 and a throat 29, wherein one end of the venturi atomizing nozzle electrode is a water inlet, and the other end of the venturi atomizing nozzle electrode is a water outlet; the center of the Venturi atomizing nozzle electrode is provided with a discharge electrode, the Venturi atomizing nozzle electrode and the discharge electrode are respectively connected with the positive electrode and the negative electrode of a direct-current high-voltage power supply 1, the direct-current high-voltage power supply 1 is connected with a grounding wire 2, the water outlet of the Venturi atomizing nozzle electrode is communicated with a capacitance system, the capacitance system is a cavity with positive and negative electrodes (plate electrodes) which are arranged in parallel, a filter membrane 7 arranged in the cavity through a filter membrane bracket 8 divides the cavity into an upper cavity and a lower cavity, the filter membrane 7 is positioned between the positive electrode 11 and the negative electrode 12 of the capacitance, the bottom end of the upper cavity is provided with a discharge outlet 9, the positive electrode and the negative electrode of the capacitance power supply 13 are respectively connected with the positive electrode 11 and the negative electrode 12 of the capacitance, the open bottom of the capacitance system is communicated with the inlet of the electrodialysis system, an anion exchange membrane 20 and a cation exchange membrane 19 are arranged in the electrodialysis cavity in a crossing way and divide the cavity into 4 parts, namely a cathode chamber 23, an anode chamber 24, a liquid inlet chamber 25 and a liquid outlet chamber 26 are arranged at the crossing part of the cathode chamber 20 and the cation exchange membrane 19 through an insulating bayonet 14, the bottom of the anode chamber is provided with a collection opening 22, the bottom of the cathode chamber is provided with an electrodialysis opening 21, the upper cavity is provided with an electrodialysis opening 15, the hydrogen collection opening is provided with an alkaline liquor collection opening 16, the bottom opening is provided with an alkaline liquor collection opening 16, the electrodialysis opening is provided with an alkaline liquor collection opening is arranged in the outside the electrodialysis system is provided with an insulating shell, the isolation valve is provided with an alkaline liquor collection opening is provided with an alkaline liquor-insulating shell, the alkaline liquor collection device is respectively, the alkaline storage device is connected with an alkaline storage device and an alkaline storage device.
The device is adopted to treat the salt-containing water (sodium sulfate is contained in 200g/L and COD is contained in 180 mg/L), after 12 hours, the COD of the effluent is reduced to 52 mg/L, the concentration of sulfuric acid is 1.02mol/L, and the concentration of sodium hydroxide is 1.9 mol/L. The COD removal rate reaches 72%, and the collected acid and alkali can also meet the requirement of most industrial recycling, and the treatment effect is good.
Example 2: the method comprises the steps of recycling saline water (containing sodium nitrate 120g/L, calcium nitrate 18 g/L and COD 150 mg/L), wherein specific parameters are as follows, corona voltage is-40 KV, a wire electrode is adopted as a discharge electrode, pulse direct current voltage connected with a capacitance system is 31V, a boron-doped diamond electrode is adopted as a capacitance system electrode, a PVDF nanofiltration membrane with tensile strength of 35MPa and aperture of 0.5nm is adopted as a filter membrane, alternating current power supply voltage connected with cross electrodialysis is 12V, a copper electrode is adopted as a cathode of the cross electrodialysis, and a platinum electrode is adopted as an anode.
The method comprises the steps of connecting a Venturi atomizing nozzle electrode and a discharge electrode with a positive electrode and a negative electrode of a direct-current high-voltage power supply respectively, opening the discharge electrode in the Venturi atomizing nozzle electrode, opening the direct-current high-voltage power supply to be 40KV, simultaneously, opening a capacitor power supply and an electrodialysis power supply to be respectively adjusted to 31V and 12V, introducing saline water into the Venturi atomizing nozzle electrode, simultaneously introducing pure oxygen in a direction perpendicular to water flow, introducing the pure oxygen and the saline water into a gas-liquid volume ratio of 0.5, introducing the saline water into a capacitor system after being atomized and charged in the Venturi atomizing nozzle electrode, intercepting and discharging negatively charged colloid by a PVDF nanofiltration membrane in the capacitor system, and collecting the positively charged ions and negatively charged ions into the capacitor system under the actions of the negative electrode and the positive electrode of the capacitor system respectively, separating the positive ions and the negative ions in the saline water, introducing the anions into an anode chamber through an anion exchange membrane under the action of the direct-current power supply, introducing the cations into the anode chamber through the cation exchange membrane, introducing the cations into the anode chamber, generating sodium hydroxide in the electrodialysis chamber and nitric acid into the anode chamber, and collecting the pure hydrogen and the hydrogen in the electrodialysis chamber, and obtaining the final water containing oxygen.
The device structure of the embodiment is the same as that of the embodiment 1, except that the Venturi atomizing nozzle electrode is a Venturi tube, and a gas inlet 10 is arranged on the Venturi atomizing nozzle electrode 4 along the direction perpendicular to the water flow; the gas inlet 10 is provided with a valve;
the device is adopted to treat organic saline water containing salt (containing sodium nitrate: 120g/L, calcium nitrate: 18 g/L and COD:150 mg/L), after 18 hours, the COD of the effluent is reduced to 38 mg/L, the nitric acid concentration is 1.1mol/L, the sodium hydroxide concentration is 2.1 mol/L, and the sodium hydroxide contains a small amount of white precipitate, and is detected to be calcium hydroxide.
Under the same conditions, the discharge electrode is changed into a hole-shaped electrode, after 18 hours, the COD of the discharged water is reduced to 24 mg/L, the nitric acid concentration is 1.3mol/L, the sodium hydroxide concentration is 2.4 mol/L, and the same sodium hydroxide contains a small amount of white precipitate, and the hole-shaped electrode is more beneficial to improving the recycling efficiency of the method through detecting calcium hydroxide.
Example 3: the organic brine containing salt (containing sodium nitrate: 150g/L, sodium sulfate 32g/L, COD:120 mg/L) is recycled, specific parameters are as follows, corona voltage is-3 KV, pulse direct current voltage connected with a capacitor system is 55V, a diamond electrode is selected as an electrode of the capacitor, a PES micro-filtration membrane with tensile strength of 30MPa and aperture of 0.08 μm is selected as a filtration membrane, direct current power voltage connected with cross electrodialysis is 35V, a platinum electrode is selected as a cathode of the cross electrodialysis, and a titanium iridium-coated electrode is selected as an anode.
The method comprises the steps of connecting a Venturi atomizing nozzle electrode and a discharge electrode with an anode and a cathode of a direct-current high-voltage power supply respectively, opening the direct-current high-voltage power supply, setting the voltage to be-3 KV, simultaneously, opening a capacitor plate power supply and an electrodialysis power supply to be respectively adjusted to 55V and 35V, introducing salt-containing water into the Venturi atomizing nozzle electrode, introducing pure oxygen into the Venturi atomizing nozzle electrode along the direction of vertical water flow, introducing the pure oxygen into the gas-liquid volume ratio of the pure oxygen to the salt-containing water to be 1, introducing the salt-containing water into a capacitor system after being atomized and charged in the Venturi atomizing nozzle electrode, intercepting and discharging the negatively charged colloid by a PES microfiltration membrane in the capacitor system, moving positively charged ions and negatively charged ions to the anode and the cathode respectively and discharging the positively charged ions into an electrodialysis system arranged at the lower end of the capacitor system, separating and enriching the anions in the salt-containing water, introducing the anions into an anode chamber through an anion exchange membrane under the effect of the direct-current power supply, introducing the cations into the anode chamber through the cation exchange membrane, generating sodium hydroxide and hydrogen in the electrodialysis cathode chamber, collecting the cathode chamber, generating the cathode chamber of the electrodialysis and the hydrogen, generating the nitric acid and generating the acid in the electrodialysis system, and collecting the acid and simultaneously, and obtaining the pure water.
The device structure of the embodiment is the same as that of the embodiment 2, except that the venturi atomizing nozzle electrode is formed by sequentially connecting a hollow cylindrical section 27, a hollow conical converging section 28 and a throat 29, and the discharge electrode is arranged at the throat of the venturi atomizing nozzle electrode;
the device is adopted to treat organic saline water containing salt (containing sodium nitrate: 150g/L, sodium sulfate 32g/L and COD:120 mg/L), after 24 hours, the COD of the effluent is reduced to 52 mg/L, the concentration of nitric acid is 1.4mol/L, the concentration of sodium hydroxide is 3.2 mol/L, and the nitric acid contains 0.2 mol/L of sulfate ions.
Example 4: the method comprises the steps of recycling saline water (containing sodium sulfate: 200g/L and COD:150 mg/L), wherein specific parameters are as follows, corona voltage is-30 KV, a needle-shaped discharge electrode is adopted, direct current voltage connected with a capacitance system is 1V, a platinum electrode is adopted as an electrode of the capacitance, a PVDF ultrafiltration membrane with tensile strength of 30MPa and aperture of 0.004 mu m is adopted as an ultrafiltration membrane, direct current power voltage connected with cross electrodialysis is 5V, a graphite electrode is adopted as a cathode of the cross electrodialysis, and a titanium ruthenium-coated electrode is adopted as an anode.
The venturi atomizing nozzle electrode and the discharge electrode are respectively connected with the positive electrode and the negative electrode of a direct-current high-voltage power supply, the direct-current high-voltage power supply is turned on, the voltage is set to be-30 KV, meanwhile, the capacitor plate power supply and the electrodialysis power supply are turned on, the voltage is respectively adjusted to be 1V and 5V, saline water is introduced into the venturi atomizing nozzle electrode, pure oxygen is introduced along the direction perpendicular to water flow, and the volume ratio of the pure oxygen to the saline water is 2. The colloid charged with negative electricity is intercepted and discharged by PVDF ultrafiltration membrane in the capacitance system, the salt-containing water passing through the ultrafiltration membrane moves to the negative electrode and the positive electrode respectively under the action of the negative electrode and the positive electrode of the capacitance system and is discharged into an electrodialysis system arranged at the lower end of the capacitance system, under the action of electrodialysis direct current power supply, anions penetrate through the anion exchange membrane to enter the anode chamber, cations penetrate through the cation exchange membrane to enter the anode chamber, sodium hydroxide and hydrogen are generated in the cathode chamber of electrodialysis and are collected, sulfuric acid and oxygen are generated in the anode chamber of electrodialysis, and ultrapure water obtained at the same time of acid collection flows out, so that recycling of the salt-containing water is finally realized.
The device of this example is the same as that of example 1; the saline water is atomized and charged under the action of the direct current high-voltage power supply 1 through the Venturi atomizing nozzle electrode 4, colloid in the saline water has negative charge, the charged quantity of the saline water is enhanced under the negative high-voltage direct current action, the charge-to-mass ratio of the saline water is increased, so that coagulation occurs, the saline water passes through the Venturi atomizing nozzle electrode, strong oxidizing substances such as hydroxyl free radicals, oxygen atoms and ozone are generated under the high-voltage direct current action, and the water to be treated passes through the discharge electrode 3 with the highest concentration of the strong oxidizing substances, so that the probability of the strong oxidizing substances on the action of pollutants in water is greatly increased, and the effect of the strong oxidizing substances on the action of the pollutants in water is enhanced. The charged salt-containing water passes through a capacitance system connected with a capacitance power supply 13, and under the action of electrophoresis, particles with positive charges and negative charges in the salt-containing water gradually move to the negative electrode and the positive electrode of the capacitance system, anions and cations in the salt-containing water are separated and enriched, and an ultrafiltration membrane in the capacitance system intercepts and eliminates the aggregated negatively charged colloid; the salt-containing water enters a liquid inlet chamber 25 of an electrodialysis system, anions and partial water permeate an anion exchange membrane 20 to enter an anode chamber 24 under the action of an electrodialysis power supply 18, corresponding acid and oxygen are generated in the anode chamber of the electrodialysis, the cation exchange membrane at the lower end of the anode chamber inhibits acid extravasation, the obtained acid is collected (discharged from an acid liquid collecting port 22), the oxygen is upwardly diffused into the whole device to generate an aeration effect, the ultrafiltration membrane is reversely flushed, membrane pollution is reduced, and meanwhile, the oxygen is changed into strong oxidizing substances such as ozone, hydroxyl free radicals and the like by corona discharge, so that the capability of oxidizing organic matters of the device is improved; cations and part of water permeate the cation exchange membrane 19 to enter the cathode chamber 23, corresponding alkali (discharged from the alkali liquid collecting port 21) and hydrogen (discharged from the hydrogen collecting port 15) are generated in the cathode chamber of electrodialysis, and are recovered, the anion exchange membrane at the lower end of the cathode chamber inhibits alkali extravasation, and the obtained ultrapure water flows out from the liquid outlet chamber 26.
The device is adopted to treat the salt-containing water (sodium sulfate is contained in 200g/L and COD is contained in 150 mg/L), after 24 hours, the COD of the effluent is reduced to 18 mg/L, the concentration of sulfuric acid is 1.2mol/L, and the concentration of sodium hydroxide is 2.3mol/L.
Under the same conditions, the power supply of the capacitor plate is turned off, COD is reduced to 21mg/L, the concentration of sulfuric acid is 0.6mol/L, the concentration of sodium hydroxide is 1.1mol/L after 24 hours, and a certain amount of sodium ions are contained in the obtained sulfuric acid after detection. It can be seen that the brine does not pass through the screening action of the capacitive plates and that the anions and cations cannot enter the electrodialysis system in order, resulting in a decrease in the concentration of the acids and bases obtained.
Claims (10)
1. A method for recycling salt-containing water based on corona discharge coupling electrodialysis, which is characterized by comprising the following steps: introducing salt-containing water into a Venturi atomizing nozzle electrode, wherein a discharge electrode is arranged in the Venturi atomizing nozzle electrode, the Venturi atomizing nozzle electrode and the discharge electrode are respectively connected with the anode and the cathode of a direct-current high-voltage power supply, the salt-containing water is atomized and charged in the Venturi atomizing nozzle electrode and then introduced into a capacitance system, the capacitance system is a cavity with the anode and the cathode arranged in parallel, a filter membrane (7) arranged in the cavity divides the cavity into an upper cavity and a lower cavity, the filter membrane (7) is positioned between a capacitance anode (11) and a capacitance cathode (12), the bottom end of the upper cavity is provided with a discharge port (9), the capacitance power supply (13) is connected with the capacitance anode (11) and the capacitance cathode (12), the open bottom of the capacitance system is communicated with the inlet of the electrodialysis system, negatively charged colloid is intercepted and discharged by the filter membrane in the capacitance system, the salt-containing water which permeates the filter membrane is subjected to the negative electrode and the positive electrode of the capacitance system, cations and anions in the salt-containing water are respectively moved to the negative electrode and the positive electrode and migrate to a system arranged at the lower end of the capacitance system in advance, and anions permeate the cations and the cations in the electrodialysis system enter the electrodialysis chamber through the anode and the anode exchange membrane and the cathode of the electrodialysis chamber under the voltage effect, and anions permeate the cations and the electrodialysis membrane and the cations in the electrodialysis chamber are generated; acid and oxygen are generated in an anode chamber of electrodialysis, and the acid is collected; meanwhile, ultrapure water is obtained, and finally, the recycling of the brine is realized.
2. The method for recycling brine based on corona discharge coupling electrodialysis according to claim 1, wherein: the venturi atomizing nozzle electrode is formed by sequentially connecting a hollow cylindrical section, a hollow conical converging section and a throat pipe, wherein one end of the venturi atomizing nozzle electrode is a water inlet, and the other end of the venturi atomizing nozzle electrode is a water outlet; the discharge electrode is wire-shaped, hole-shaped or needle-shaped, and the voltage of the direct current high-voltage power supply is-40 KV to-1 KV.
3. The method for recycling brine based on corona discharge coupling electrodialysis according to claim 1, wherein: pure oxygen or air is introduced from the Venturi atomizing nozzle electrode along the direction perpendicular to the water flow, and the volume ratio of the pure oxygen or air to the gas-liquid containing salt water is 0.1-10.
4. The method for recycling brine based on corona discharge coupling electrodialysis according to claim 1, wherein: the power supply connected with the positive electrode and the negative electrode of the capacitor system is a direct current power supply, the voltage of the direct current power supply is 0.5-60V, the positive electrode of the capacitor system is a copper electrode, a platinum electrode and a diamond electrode, and the negative electrode is a copper electrode, a platinum electrode and a diamond electrode.
5. The method for recycling brine based on corona discharge coupling electrodialysis according to claim 1 or 4, wherein: the filter membrane has tensile mechanical strength of more than 20MPa and pore diameter of less than 0.1 μm.
6. The method for recycling brine based on corona discharge coupling electrodialysis according to claim 1, wherein: the electrodialysis system is a cross electrodialysis system, the power supply is a direct current power supply, the voltage is 2-36V, the anion exchange membrane and the cation exchange membrane are arranged in the electrodialysis chamber in a cross mode and divide the chamber into 4 parts, the electrodialysis system comprises a cathode chamber and an anode chamber, the cathode in the electrodialysis system is a stainless steel electrode, a copper electrode, a platinum electrode or a graphite electrode, and the anode is a platinum electrode, a titanium ruthenium electrode or a titanium iridium electrode.
7. An apparatus for carrying out the method for recycling brine based on corona discharge coupled electrodialysis according to any one of claims 1-6, wherein: the device comprises a direct-current high-voltage power supply (1), a discharge electrode (3), a Venturi atomizing nozzle electrode (4), a capacitance system, an electrodialysis system, a capacitance power supply (13) and an electrodialysis power supply (18); the center of the Venturi atomizing nozzle electrode is provided with a discharge electrode, the Venturi atomizing nozzle electrode and the discharge electrode are respectively connected with the positive electrode and the negative electrode of a direct-current high-voltage power supply (1), the direct-current high-voltage power supply (1) is connected with a grounding wire (2), the water outlet of the Venturi atomizing nozzle electrode is communicated with a capacitance system, the capacitance system is a cavity provided with the positive electrode and the negative electrode in parallel, a filter membrane (7) arranged in the cavity divides the cavity into an upper cavity and a lower cavity, the filter membrane (7) is positioned between the positive electrode (11) and the negative electrode (12), the bottom end of the upper cavity is provided with a discharge outlet (9), the capacitance power supply (13) is connected with the positive electrode (11) and the negative electrode (12), the open bottom of the capacitance system is communicated with the inlet of an electrodialysis system, an anion exchange membrane (20), a cation exchange membrane (19) is arranged in the electrodialysis cavity in a crossing manner, namely a cathode chamber (23), an anode chamber (24), a liquid inlet chamber (25), a liquid outlet chamber (26), an anion exchange membrane (20), a cation exchange membrane (19) are connected with an insulating bayonet (14) through a cross, the bottom of the anode chamber (24), an electrodialysis chamber (21) is provided with an opening (16), and an alkaline solution collecting opening (16) is arranged in the electrodialysis system, and the hydrogen collecting opening (16) is arranged in the electrodialysis system The electrodialysis cathodes (17) are respectively connected with an electrodialysis power supply (18).
8. The apparatus according to claim 7, wherein: a gas inlet (10) is arranged on the Venturi atomizing nozzle electrode (4) along the direction perpendicular to the water flow.
9. The apparatus according to claim 7, wherein: an insulating pipe sleeve (5) is arranged outside the Venturi atomizing nozzle electrode (4), and an insulating shell (6) is arranged outside the capacitance system and the electrodialysis system.
10. The apparatus according to claim 8, wherein: valves are arranged on the exhaust port (9), the gas inlet (10), the alkali liquor collecting port (21) and the acid liquor collecting port (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047155.9A CN108128854B (en) | 2018-01-18 | 2018-01-18 | Method and device for recycling saline water based on corona discharge coupling electrodialysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047155.9A CN108128854B (en) | 2018-01-18 | 2018-01-18 | Method and device for recycling saline water based on corona discharge coupling electrodialysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108128854A CN108128854A (en) | 2018-06-08 |
| CN108128854B true CN108128854B (en) | 2023-07-18 |
Family
ID=62400317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810047155.9A Active CN108128854B (en) | 2018-01-18 | 2018-01-18 | Method and device for recycling saline water based on corona discharge coupling electrodialysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108128854B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918640B (en) * | 2018-07-10 | 2021-06-18 | 北京博奥瑞科技有限公司 | Device and method for monitoring and repairing cracks of wing member |
| CN110606603A (en) * | 2019-09-30 | 2019-12-24 | 辽宁石油化工大学 | High-efficient pollution-free electrochemistry sewage treatment plant |
| CN110981071A (en) * | 2019-11-25 | 2020-04-10 | 河北工程大学 | Prefabricated strong magnetic ionization atomizing power plant circulating water system |
| CN112299534A (en) * | 2020-10-30 | 2021-02-02 | 西安理工大学 | Efficient special wastewater treatment and water mist recovery device and recovery method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1591826A (en) * | 1977-04-07 | 1981-06-24 | Electric Power Res Inst | Focusing electrodes for high-intensity ionizer stage of electrostatic precipitator |
| SU1094622A1 (en) * | 1982-07-02 | 1984-05-30 | Новосибирский Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта | Gas ionizer |
| JP2010264385A (en) * | 2009-05-14 | 2010-11-25 | Tohoku Univ | Electrodialyzer |
| 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 |
| CN103537245A (en) * | 2013-10-31 | 2014-01-29 | 昆明理工大学 | Venturi ionization device for preparing hydroxyl radical |
| CN204168589U (en) * | 2014-11-11 | 2015-02-18 | 衢州迪升工业设计有限公司 | A kind of negative electrode of microporous membrane structure and plasma pyrolysis water spray gun |
| CN106006867A (en) * | 2016-06-27 | 2016-10-12 | 南京师范大学 | Non-membrane electrodialysis capacitance desalting device |
| CN106904696A (en) * | 2017-04-27 | 2017-06-30 | 中国葛洲坝集团第工程有限公司 | A kind of micro- salty black and odorous water jet-flow aeration electrochemical oxidation repair system |
-
2018
- 2018-01-18 CN CN201810047155.9A patent/CN108128854B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1591826A (en) * | 1977-04-07 | 1981-06-24 | Electric Power Res Inst | Focusing electrodes for high-intensity ionizer stage of electrostatic precipitator |
| SU1094622A1 (en) * | 1982-07-02 | 1984-05-30 | Новосибирский Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта | Gas ionizer |
| JP2010264385A (en) * | 2009-05-14 | 2010-11-25 | Tohoku Univ | Electrodialyzer |
| 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 |
| CN103537245A (en) * | 2013-10-31 | 2014-01-29 | 昆明理工大学 | Venturi ionization device for preparing hydroxyl radical |
| CN204168589U (en) * | 2014-11-11 | 2015-02-18 | 衢州迪升工业设计有限公司 | A kind of negative electrode of microporous membrane structure and plasma pyrolysis water spray gun |
| CN106006867A (en) * | 2016-06-27 | 2016-10-12 | 南京师范大学 | Non-membrane electrodialysis capacitance desalting device |
| CN106904696A (en) * | 2017-04-27 | 2017-06-30 | 中国葛洲坝集团第工程有限公司 | A kind of micro- salty black and odorous water jet-flow aeration electrochemical oxidation repair system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108128854A (en) | 2018-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108128854B (en) | Method and device for recycling saline water based on corona discharge coupling electrodialysis | |
| CN109550771B (en) | Method and device for removing organic pollutants in industrial waste salt | |
| CN215559587U (en) | Purifier, self-cleaning filtration system | |
| US20140091039A1 (en) | System and method for the treatment of hydraulic fracturing backflow water | |
| CN103806019A (en) | Rotational-flow membrane electrolyzer | |
| WO2021223369A1 (en) | Chemical-free electric method combined treatment process system and method for circulating water of thermal power plant | |
| CN114684981B (en) | Treatment method and system for wastewater containing heavy metals | |
| US20180327287A1 (en) | System for regenerating sodium hydroxide and sulfuric acid from waste water stream containing sodium and sulfate ions | |
| CN107626207B (en) | Method and device for enriching waste acid and synchronously recovering metal by using conductive ceramic membrane | |
| CN112939321A (en) | Steel wastewater zero-discharge treatment technology | |
| CN203807291U (en) | Power plant desulfurization wastewater zero-emission treatment and reusing device | |
| CN104529018A (en) | Process for treating and recycling printing and dyeing wastewater by virtue of electro-coagulation | |
| CN111252968A (en) | Method for concentrating copper sulfate by using membrane technology | |
| CN106746046A (en) | Process unit and method that ionic membrane realizes desulfurization waste liquor zero-emission are driven based on electricity | |
| CN111233221A (en) | Water purification method and system and water purifier with stable pure water output | |
| AU2021104719A4 (en) | Method and device for recycling saline water based on corona discharge coupled electrodialysis | |
| CN105621761B (en) | A kind of oilfield produced water processing method, processing unit | |
| TWI702082B (en) | Electric dialysis desalting system of hollow fibre membrane | |
| CN212151930U (en) | Water purification system and water purifier with multiple purification units | |
| CN212954670U (en) | Stable output formula water purification system of pure water and water purifier | |
| CN210656555U (en) | Brackish water treatment facilities based on electrosorption technology | |
| CN114873816A (en) | Phosphate waste water zero release processing system | |
| CN103435015B (en) | Technique and device for extracting sulfuric acid (H2SO4) from acid mine water | |
| CN111825266A (en) | Catalytic cracking wet desulphurization waste water recycling system and method | |
| CN208087280U (en) | The device of electrodialysis recycling brackish water is coupled based on corona discharge |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |