CN113336302A - Sewage desalting device, sewage desalting apparatus and sewage desalting method - Google Patents
Sewage desalting device, sewage desalting apparatus and sewage desalting method Download PDFInfo
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- CN113336302A CN113336302A CN202110608111.0A CN202110608111A CN113336302A CN 113336302 A CN113336302 A CN 113336302A CN 202110608111 A CN202110608111 A CN 202110608111A CN 113336302 A CN113336302 A CN 113336302A
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- 238000011033 desalting Methods 0.000 title claims abstract description 79
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- 238000011069 regeneration method Methods 0.000 claims abstract description 151
- 238000010612 desalination reaction Methods 0.000 claims abstract description 144
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 136
- 150000001768 cations Chemical class 0.000 claims abstract description 101
- 238000010828 elution Methods 0.000 claims abstract description 98
- 150000001450 anions Chemical class 0.000 claims abstract description 94
- 238000001179 sorption measurement Methods 0.000 claims abstract description 89
- 238000006243 chemical reaction Methods 0.000 claims abstract description 75
- 238000003795 desorption Methods 0.000 claims abstract description 49
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- 230000001172 regenerating effect Effects 0.000 claims abstract description 5
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—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
- C02F1/4695—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
Abstract
The invention provides a sewage desalting device, a sewage desalting apparatus and a sewage desalting method, wherein the sewage desalting device comprises: a desalting reactor having an electrolyte solution capable of adsorbing anions and cations in sewage in the electrolyte solution by a flow electrode capacitive deionization reaction; an electrode regeneration reactor connected with the desalination reactor and capable of regenerating the electrolyte solution through electrode regeneration reaction to desorb anions and cations into the elution water; wherein, the electric serous fluid and the sewage, and the electric serous fluid and the washing and dewatering are separated by an ion exchange structure. The sewage desalting device can be used for continuous production, can be used for simultaneously carrying out adsorption and desorption operations of anions and cations, has high efficiency, can circulate the electrolyte after desorption, and effectively reduces the cost. Fully embodies the technical characteristics of the flowing electrode capacitance deionization technology such as safety, low energy consumption, continuity and stability, and solves the problems of high cost, low efficiency and incapability of being applied to the actual environmental treatment of industrial wastewater, municipal sewage and the like.
Description
Technical Field
The invention relates to the field of environmental engineering, in particular to a sewage desalting device, a sewage desalting device and a sewage desalting method.
Background
The high-salinity wastewater has wide generation ways and increased water quantity year by year, the high-salinity wastewater discharged in large quantity, such as industrial wastewater, urban sewage and the like, can directly cause the water quality mineralization of rivers to be improved, minerals can not only cause water eutrophication, land salinization and ecological diversity reduction, but also bring serious pollution to soil, surface water and underground water, thereby endangering the ecological environment. The mainstream solution at present is to treat and discharge sewage, which can reduce the pollution of sewage to the environment and realize the recovery and full utilization of waste resources.
The Capacitive Deionization (CDI) technology is a novel sewage treatment method, is a derivative technology based on a super capacitor, and has the advantages of low operation cost, high efficiency, less environmental pollution, simple and easy technology, safety and the like, and is gradually developed into a research hotspot. The core of the capacitive deionization technology lies in a double-electric-layer theory, an electric field is generated by electrifying a polar plate through an external direct current, ions in sewage migrate to corresponding electrodes under the action of the electric field, an electric double-layer structure is generated on the surface of an adsorptive material to achieve the electro-adsorption effect, and the adsorbed ions are desorbed into elution water through the regeneration of the adsorptive electrode to achieve the enrichment of salinity. However, the development of conventional capacitive deionization techniques is limited by the adsorption amount of the electrodes and the sheet-making process, and ions adsorbed on the electrodes are easily re-attracted back to the sewage by the counter-ion effect, thereby resulting in a reduction in efficiency and an increase in energy consumption. Membrane capacitive adsorption (MCDI) was developed to solve this problem. Based on the prior CDI technology, the surface of the electrode is provided with an anion-cation exchange membrane to prevent adsorbed ions from returning to the solution again, so that the electric adsorption performance is improved. However, one drawback of both CDI and MCDI technologies is that continuous production cannot be achieved, the desorption and adsorption processes must be repeated continuously and the type and performance of the electrodes directly determine the efficiency of the electro-adsorption. In order to solve the problem, experts propose that the electrode adopts the electrolytic slurry to circulate in the electrode chamber to replace the original fixed electrode, so that the basic principle of the flow-electrode capacitance deionization (FCDI) technology is developed to be similar to that of CDI and MCDI, but the electrode adopts the flowable electrolytic slurry, the electrode is separated from sewage by using an ion exchange membrane, the plasma liquid is electrified by the electrode, and under the action of an electric field, anions and cations are migrated and adsorbed in the electrolytic slurry through the ion exchange membrane and are circularly carried out, so that the adsorption efficiency is improved, and the desalting effect is improved.
In the process of implementing the technical scheme of the invention in the embodiment of the present application, the inventor of the present application finds that the above-mentioned technology has at least the following technical problems:
currently, the FCDI technology is still in the research stage, has few references and basically no practical application, and is still in the laboratory development stage and the process of FCDI is also in the exploration state. The reference basis for researching the FCDI technology in China is few, the process is immature, the device types are multiple, the FCDI technology is continuously researched and parameters are groped at present, and therefore the FCDI technology-based operable desalination process and device are a problem to be solved urgently at the present stage.
Disclosure of Invention
In view of the above problems of the inability to achieve continuous production, the technical immaturity, and the inability to apply to practical environmental treatment of industrial wastewater, municipal sewage, and the like, the present invention has been made in order to provide a sewage desalination apparatus, and a sewage desalination method that overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a sewage desalination apparatus comprising:
a desalting reactor having an electric slurry liquid in which anions and cations in sewage can be adsorbed by a flow electrode capacitive deionization reaction;
an electrode regeneration reactor connected with the desalination reactor and capable of regenerating the electrolyte solution through an electrode regeneration reaction to desorb the anions and cations into elution water;
wherein, the electric serous fluid and the sewage and the electric serous fluid and the washing and dewatering room are separated by an ion exchange structure.
Preferably, the desalination reactor comprises:
a cation adsorption chamber capable of housing the electrolyte solution;
a sewage storage chamber connected to the cation adsorption chamber and capable of storing the sewage;
an anion adsorption chamber connected to the sewage storage chamber and capable of containing the electrolyte solution;
the ion exchange structure comprises a first ion exchange membrane and a second ion exchange membrane, the junction of the cation adsorption chamber and the sewage storage chamber is separated by the first ion exchange membrane, and the junction of the anion adsorption chamber and the sewage storage chamber is separated by the second ion exchange membrane.
Preferably, the desalination reactor further comprises:
the first electrode fixing plate is provided with a first electrode cavity and can accommodate a first electrode plate;
a first reaction chamber frame plate connected to the first electrode fixing plate, the cation adsorption chamber being disposed in the first reaction chamber frame plate;
a second reaction chamber frame plate connected to the first reaction chamber frame plate, the sewage storage chamber being provided in the second reaction chamber frame plate;
a third reaction chamber frame plate connected to the second reaction chamber frame plate, the anion adsorption chamber being provided in the third reaction chamber frame plate;
the second electrode fixing plate is provided with a second electrode cavity and can contain a second electrode plate;
the first electrode cavity is communicated with the cation adsorption chamber, and the second electrode cavity is communicated with the anion adsorption chamber.
Preferably, a plurality of first baffling baffles, a plurality of second baffling baffles and a plurality of third baffling baffles are arranged in the cation adsorption chamber, the sewage storage chamber and the anion adsorption chamber respectively.
Preferably, the electrode regeneration reactor comprises:
a cation desorption chamber capable of containing the electro-slurry liquid which adsorbs anions and cations in the sewage;
an elution water storage chamber connected to the cation desorption chamber and capable of storing the elution water;
an anion desorption chamber connected to the eluent storage chamber and capable of holding the electrolytic bath having adsorbed anions and cations in the sewage;
wherein the junction of the cation desorption chamber and the eluted water storage chamber is separated by a third ion exchange membrane, and the junction of the anion desorption chamber and the eluted water storage chamber is separated by a fourth ion exchange membrane.
Preferably, the cation adsorption chamber, the sewage storage chamber, the anion adsorption chamber, the cation desorption chamber, the eluted water storage chamber and the anion desorption chamber are all provided with a feed inlet and a discharge outlet.
According to another aspect of the present invention, there is provided a batch-type sewage desalination apparatus comprising:
a wastewater desalination apparatus, the wastewater desalination apparatus being any of the wastewater desalination apparatuses described above;
a wastewater circulation tank capable of storing wastewater from the desalination reactor and resupplying the wastewater into the desalination reactor;
an elution water circulation tank capable of storing elution water from the electrode regeneration reactor and resupplying the same to the electrode regeneration reactor;
and a flow electrode agitation tank capable of storing and agitating the slurry solution from the desalination reactor and transferring the slurry solution to the electrode regeneration reactor, and storing and agitating the slurry solution from the electrode regeneration reactor and transferring the slurry solution to the desalination reactor.
According to another aspect of the present invention, there is provided a continuous type sewage desalination apparatus comprising:
the device comprises an electrode regeneration reactor and a plurality of desalination reactors, wherein the desalination reactors are sequentially arranged according to the sewage conveying direction;
the desalting reactor is provided with an electric serous fluid, and anions and cations in the sewage can be absorbed in the electric serous fluid through flowing electrode capacitive deionization reaction;
the electrode regeneration reactor is connected with the desalination reactor and can regenerate the electric serous fluid through electrode regeneration reaction so as to desorb the negative ions and the positive ions into elution water;
wherein the electric serous fluid and the sewage and the electric serous fluid and the washing and dewatering room are separated by an ion exchange structure;
a sewage buffer tank capable of storing sewage and supplying into the desalination reactor;
an elution water circulation tank capable of storing elution water from the electrode regeneration reactor and resupplying the same to the electrode regeneration reactor;
a flow electrode reservoir capable of storing and providing the electro-slurry liquid to the desalination reactor and receiving and storing the electro-slurry liquid output by the electrode regeneration reactor.
According to another aspect of the present invention, there is provided a method for intermittently desalting contaminated water, comprising:
injecting an electric slurry circulating between the desalting reactor and the electrode regeneration reactor and charging the electric slurry;
driving the sewage to flow through a sewage storage chamber of the desalting reactor, and generating a flowing electrode capacitance deionization reaction in the desalting reactor so as to adsorb anions and cations in the sewage into the electrolyte solution;
driving elution water to flow through an elution water storage chamber of the electrode regeneration reactor and generating an electrode regeneration reaction in the electrode regeneration reactor so as to desorb anions and cations in the electrolyte solution into the elution water.
According to another aspect of the present invention, there is provided a method for continuous desalination of contaminated water, comprising:
injecting the electric slurry which circularly flows among a plurality of desalting reactors and electrode regeneration reactors and electrifying the electric slurry;
driving the sewage to sequentially flow through sewage storage chambers of a plurality of desalting reactors, and carrying out a plurality of flowing electrode capacitive deionization reactions in the plurality of desalting reactors so as to adsorb anions and cations in the sewage into the electrolyte solution;
driving elution water to flow through an elution water storage chamber of the electrode regeneration reactor and generating an electrode regeneration reaction in the electrode regeneration reactor so as to desorb anions and cations in the electrolyte solution into the elution water.
The invention has the beneficial effects that: the invention has reasonable and ingenious structural design, the sewage desalting device can continuously produce, can simultaneously carry out adsorption and desorption operations of anions and cations, has high efficiency, and the electric serous fluid can be circulated after desorption, thereby effectively reducing the cost. The process is mature, the operable desalination process and device based on the FCDI technology are provided, the technical characteristics of safety, low energy consumption, continuity and stability of the flow electrode capacitance deionization technology are fully reflected, the problems of high cost, low efficiency and incapability of being applied to actual environment treatment of industrial wastewater, municipal sewage and the like are solved, and the wastewater desalination device and equipment which can be continuously produced and operated are provided; the sewage desalting device, the intermittent sewage desalting equipment and the continuous sewage desalting equipment have wide application scenes, are flexible to adjust, are convenient to allocate according to operation requirements, have simple core device structures, are convenient to process on a large scale, have high structural generalization degree of the core device, are close to standardized parts, and are convenient to improve the treatment capacity; in addition, the desalting rate is high, the overall average efficiency is close to 90%, the sewage desalting can be realized, the salt enrichment is realized, and the resources are recycled; meanwhile, the method has high efficiency and no pollution, is an environment-friendly new process and device, and is beneficial to popularization and use.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the structure of a desalination reactor in an embodiment of the invention;
FIG. 2 is an exploded view of a desalination reactor according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second electrode fixing plate according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a first reaction chamber frame plate in the embodiment of the present invention;
FIG. 5 is a schematic view showing the construction of an intermittent type sewage desalination apparatus according to an embodiment of the present invention;
FIG. 6 is a desalination graph of an intermittent type sewage desalination apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic view showing the construction of a continuous type sewage desalination apparatus according to an embodiment of the present invention.
Description of reference numerals: 1. a desalination reactor; 2. an electrode regeneration reactor; 11. a first electrode fixing plate; 111. a first electrode compartment; 12. a first reaction chamber frame plate; 121. a third seal groove; 122. a first baffle; 123. through the hole; 13. a second reaction chamber frame plate; 14. a third reaction chamber frame plate; 15. a second electrode fixing plate; 151. a second electrode receptacle; 152. an eighth seal groove; 16. a first power strip; 17. a second power strip; 18. a limiting hole; a1, a sewage circulating tank; a2, an elution water circulation tank; a11, first anode chamber flow electrode flow regulating valve; a12, a first negative chamber flow electrode flow regulating valve; a13, first flowing electrode feed pump; a14, first flowing electrode feed valve; a15, a flow electrode discharge valve; a16, connecting an electrode regeneration reactor with an elution water feeding pump; a17, an outlet valve of the elution water circulation tank; a18, emptying a washing water circulation tank; a19, electrode regeneration reactor feed valve; a20, electrode regeneration reactor feed pump; a21, discharging valve of reactor eluting water; a22, a second anode chamber flow electrode flow regulating valve; a23, a second cathode flow electrode flow regulating valve; a24, second flow electrode feed pump; a25, second flow electrode feed valve; a26, a second flow electrode bleeder valve; a27, a desalting reactor sewage circulating tank feed valve; a28, an electrode regeneration reactor elution water circulation tank feed valve; a29, a flow electrode stirring kettle emptying valve; a3, a flow electrode stirring kettle; a4, a sewage reservoir; a5, desalting reactor sewage feed pump; a6, a discharge valve of the sewage circulating tank; a7, emptying the sewage circulating tank; a8, desalting reactor feed valve; a9, desalting reactor feed pump; b1, a sewage buffer tank; b2, an elution water circulation tank; b3, a flow electrode reservoir; b4, a sewage reservoir; b5, desalting reactor buffer tank feed pump; b6, a sewage buffer tank emptying valve; b7, desalting reactor feed valve; b8, desalting reactor buffer tank feed valve; b9, desalting reactor feed pump; b10, reactor flow electrode feed pump; b11, desalting reactor flow electrode feed valve; b12, a flow electrode introduction valve; b13, flow electrode tank emptying valve; b14, a reactor sewage discharge valve; b15, reactor flow electrode discharge valve; b16, feeding pump of electrode regeneration reactor elution water circulation tank; b17, an electrode regeneration reactor flowing electrode elution water discharge valve; b18, emptying the electrode regeneration reactor elution water circulation tank; b19, an electrode regeneration reactor elution water feeding valve; b20, discharge valve of the electrode regeneration reactor elution water circulation tank; b21, an electrode regeneration reactor elution water feeding pump; b22, an electrode regeneration reactor elution water circulation tank feed valve; b23, an electrode regeneration reactor flow electrode discharge valve; b24, electrode regeneration reactor flow electrode feed pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, an embodiment of the present invention provides a wastewater desalination apparatus, including:
a desalination reactor 1 having an electrolyte solution in which anions and cations in sewage can be adsorbed by a flow electrode capacitive deionization reaction;
an electrode regeneration reactor 2 connected to the desalination reactor 1 and capable of regenerating the electrolyte solution by an electrode regeneration reaction to desorb the anions and cations into elution water;
wherein, the electric serous fluid and the sewage and the electric serous fluid and the washing and dewatering room are separated by an ion exchange structure.
Specifically, the basic principle of the desalination reactor 1 is similar to CDI and MCDI, but the electrodes adopt flowable electric slurry, the electric slurry is separated from the sewage by using an ion exchange structure, when the electric slurry is charged, under the action of an electric field, negative and positive examples are migrated and adsorbed in the electric slurry through the ion exchange structure and are circularly carried out, so that the desalination of the sewage is realized;
the basic principle of the electrode regeneration reactor is an electrode regeneration reaction, the electrode regeneration reactor separates the electrolyte from the elution water by utilizing an ion exchange structure, and anions and cations adsorbed in the electrolyte can pass through the ion exchange structure to be desorbed in the elution water by regenerating the electrolyte;
therefore, the sewage desalting device can be used for continuous production, anions and cations are desorbed through the electrode regeneration reactor 2, the adsorption and desorption operation of the anions and the cations can be carried out simultaneously when the sewage desalting device is used for continuous production, the efficiency is high, the electrolyte can be circulated after desorption, and the cost is effectively reduced.
Further, the components of the electric slurry are active carbon, a dispersing agent, acetylene black and water, and the electric slurry is uniformly stirred until standing does not generate layering.
Preferably, the desalination reactor 1 comprises:
a cation adsorption chamber capable of housing the electrolyte solution;
a sewage storage chamber connected to the cation adsorption chamber and capable of storing the sewage;
an anion adsorption chamber connected to the sewage storage chamber and capable of containing the electrolyte solution;
the ion exchange structure comprises a first ion exchange membrane and a second ion exchange membrane, the junction of the cation adsorption chamber and the sewage storage chamber is separated by the first ion exchange membrane, and the junction of the anion adsorption chamber and the sewage storage chamber is separated by the second ion exchange membrane.
Specifically, the cation adsorption chamber and the anion adsorption chamber are used as flowing places of electric plasma liquid and are used for components and adsorption of an electric double-layer structure, when electric power is supplied from the outside, the plasma liquid in the cation adsorption chamber is used as a cathode, the plasma liquid in the anion adsorption chamber is used as an anode, an electric field is generated between the two layers of plasma liquid, anions are adsorbed to the plasma liquid in the anion adsorption chamber used as the anode, cations are adsorbed to the plasma liquid in the cation adsorption chamber used as the cathode, and the first ion exchange membrane and the second ion exchange membrane are matched, so that normal migration of the anions and the cations can be guaranteed, and mutual pollution of the electric plasma liquid and sewage can be avoided.
Preferably, the desalination reactor 1 further includes:
a first electrode fixing plate 11 having a first electrode receiving cavity 111 capable of receiving a first electrode pad;
a first reaction chamber frame plate 12 connected to the first electrode fixing plate 11, the cation adsorption chamber being provided in the first reaction chamber frame plate 12;
a second reaction chamber frame plate 13 connected to the first reaction chamber frame plate 12, the sewage storage chamber being provided in the second reaction chamber frame plate 13;
a third reaction chamber frame plate 14 connected to the second reaction chamber frame plate 13, the anion adsorption chamber being provided in the third reaction chamber frame plate 14;
a second electrode fixing plate 15 having a second electrode receiving cavity 151 capable of receiving a second electrode sheet;
the first electrode cavity 111 is communicated with the cation adsorption chamber, and the second electrode cavity 151 is communicated with the anion adsorption chamber.
Specifically, since the cation adsorption chamber is disposed in the first reaction chamber frame plate 12 and is communicated with the first electrode cavity 111, the first electrode sheet stored in the first electrode cavity 111 can charge the plasma liquid in the cation adsorption chamber when the first electrode sheet is electrified; similarly, the second electrode plate is operated to charge the plasma liquid in the anion absorption chamber; in addition, the first electrode fixing plate 11 and the third reaction chamber frame plate 14 also protect the first reaction chamber frame plate 12, the second reaction chamber frame plate 13 and the third reaction chamber frame plate 14.
Further, the first electrode plate and the second electrode plate are both graphite electrodes, and the purity of graphite is greater than or equal to 99.99%.
Preferably, the desalination reactor 1 further includes:
a first electrode fixing plate 11, a first reaction chamber frame plate 12, a first electrode fixing plate 16, a first electrode fixing plate, a second electrode fixing plate, and a second electrode fixing plate, a second electrode fixing plate and a second electrode fixing plate;
and a second electrode fixing plate 15 and a third reaction chamber frame plate 14, which are connected to each other through a second electrode fixing bar 17.
Specifically, the first power connection strip 16 and the second power connection strip 17 are copper foil strips for connecting with the outside.
Further, a first sealing groove is formed in the first electrode fixing plate 11 around the first electrode receiving cavity 111, a second sealing groove is formed in one side of the first reaction chamber frame plate 12 around the cation adsorption chamber corresponding to the first sealing groove, and first sealing rings are clamped in the first sealing groove and the second sealing groove;
a third sealing groove 121 is formed on the other side of the first reaction chamber frame plate 12 around the cation adsorption chamber, a fourth sealing groove is formed on one side of the second reaction chamber frame plate 13 around the sewage storage chamber corresponding to the third sealing groove 121, and second sealing rings are clamped in the third sealing groove 121 and the fourth sealing groove;
a fifth sealing groove is formed in the other side of the second reaction chamber frame plate 13 around the sewage storage chamber, a sixth sealing groove is formed in one side of the third reaction chamber frame plate 14 corresponding to the fifth sealing groove and around the anion adsorption chamber, and third sealing rings are clamped in the fifth sealing groove and the sixth sealing groove;
a seventh sealing groove is formed in the other side of the third reaction chamber frame plate 14 around the anion adsorption chamber, an eighth sealing groove 152 is formed in the one side of the second electrode fixing plate 15 corresponding to the seventh sealing groove around the second electrode accommodating chamber 151, and fourth sealing rings are clamped in the seventh sealing groove and the eighth sealing groove 152.
Furthermore, the first electrode fixing plate 11, the first reaction chamber frame plate 12, the second reaction chamber frame plate 13, the third reaction chamber frame plate 14 and the second electrode fixing plate 15 are all provided with eight fixing limiting holes 18 penetrating through the left and right side surfaces of the first electrode fixing plate, the second reaction chamber frame plate and the third reaction chamber frame plate. The first electrode fixing plate 11, the first reaction chamber frame plate 12, the second reaction chamber frame plate 13, the third reaction chamber frame plate 14 and the second electrode fixing plate 15 are fastened and fixed by screws.
Preferably, a plurality of first baffling baffles 122, a plurality of second baffling baffles and a plurality of third baffling baffles are respectively arranged in the cation adsorption chamber, the sewage storage chamber and the anion adsorption chamber.
Specifically, the plurality of first baffle plates 122 are inclined in the same direction, the plurality of second baffle plates are inclined in the same direction, and the plurality of third baffle plates are inclined in the same direction; through the setting of a plurality of first baffling baffles 122, second baffling baffle, third baffling baffle, not only can increase the dwell time of sewage/electricity thick liquid in desalination reactor 1, increase reaction area, can reduce the dead area moreover, further raise the efficiency.
The first baffling baffle 122, the second baffling baffle and the third baffling baffle are all provided with through holes 123.
Preferably, the electrode regeneration reactor 2 includes:
a cation desorption chamber capable of containing the electro-slurry liquid which adsorbs anions and cations in the sewage;
an elution water storage chamber connected to the cation desorption chamber and capable of storing the elution water;
an anion desorption chamber connected to the eluent storage chamber and capable of holding the electrolytic bath having adsorbed anions and cations in the sewage;
wherein the junction of the cation desorption chamber and the eluted water storage chamber is separated by a third ion exchange membrane, and the junction of the anion desorption chamber and the eluted water storage chamber is separated by a fourth ion exchange membrane.
Specifically, the cation desorption chamber and the anion desorption chamber are used as flowing places of the electric slurry and are used for component and desorption of an electric double layer structure, when the electric power is supplied from the outside, the plasma liquid in the cation desorption chamber is used as an anode, the plasma liquid in the anion desorption chamber is used as a cathode, an electric field is generated between the two layers of plasma liquid, anions adsorbed by the electric slurry in the anion desorption chamber are desorbed into the elution water, cations adsorbed by the electric slurry in the cation desorption chamber are desorbed into the elution water to realize ion enrichment, and the first ion exchange membrane and the second ion exchange membrane are matched, so that normal migration of the anions and the cations can be ensured, and mutual pollution of the electric slurry and sewage can be prevented.
Further, the cation desorption chamber of the electrode regeneration reactor 2 has the same structure as the cation adsorption chamber of the desalination reactor 1, and the anion desorption chamber of the electrode regeneration reactor 2 has the same structure as the anion adsorption chamber of the desalination reactor 1; the structure of the elution water storage chamber is the same as that of the sewage storage chamber.
The electrode regeneration reactor 2 is different from the desalination reactor 1 in that the cation desorption chamber of the electrode regeneration reactor 2 is opposite in polarity to the plasma liquid stored in the cation adsorption chamber of the desalination reactor 1, and the anion desorption chamber of the electrode regeneration reactor 2 is opposite in polarity to the plasma liquid stored in the anion adsorption chamber of the desalination reactor 1. That is, the first and second electrode sheets in the desalination reactor 1 are completely opposite to the first and second electrode sheets in the electrode regeneration reactor.
Further, the elution water is generally sewage, and a small amount of sewage is extracted from all sewage needing to be treated for realizing the enrichment of anions and cations.
Preferably, the cation adsorption chamber, the sewage storage chamber, the anion adsorption chamber, the cation desorption chamber, the eluted water storage chamber and the anion desorption chamber are all provided with a feed inlet and a discharge outlet.
Referring to FIG. 5, according to another aspect of the present invention, there is provided a batch-type sewage desalination apparatus comprising:
a wastewater desalination apparatus, the wastewater desalination apparatus being any of the wastewater desalination apparatuses described above;
a sewage circulation tank a1 capable of storing the sewage from the desalination reactor 1 and resupplying it to the desalination reactor 1;
an elution water circulation tank a2 capable of storing elution water from the electrode regeneration reactor 2 and resupplying it to the electrode regeneration reactor 2;
and a flow electrode agitation tank a3 capable of storing and agitating the electrolyte solution from the desalination reactor 1 and transferring it to the electrode regeneration reactor 2, and storing and agitating the electrolyte solution from the electrode regeneration reactor 2 and transferring it to the desalination reactor 1.
Specifically, the batch-type sewage desalination apparatus further comprises a sewage reservoir a4, the sewage reservoir a4 is connected to the sewage circulation tank a1 through a desalination reactor sewage feed pump a 5; a sewage circulation tank discharge valve a6, a sewage circulation tank emptying valve a7 and a desalination reactor feed valve a8 are arranged on the sewage circulation tank a 1;
the desalination reactor feed valve a8 of the wastewater circulation tank a1 and the desalination reactor 1 are connected with the feed inlet of the wastewater storage chamber of the desalination reactor 1 through a desalination reactor feed pump a9, and the discharge outlet of the wastewater storage chamber of the desalination reactor 1 and the wastewater circulation tank a1 are connected through a reactor wastewater discharge valve a 10;
the discharge ports of the cation adsorption chamber and the anion adsorption chamber of the desalination reactor 1 are respectively provided with a first anode chamber flowing electrode flow regulating valve a11 and a first cathode chamber flowing electrode flow regulating valve a12, the first anode chamber flowing electrode flow regulating valve a11 and the first cathode chamber flowing electrode flow regulating valve a12 are connected with a first flowing electrode feed valve a14 of the flowing electrode stirring kettle a3 through a first flowing electrode feed pump a13, and the flowing electrode stirring kettle a3 is connected with the feed ports of the cation adsorption chamber and the anion adsorption chamber of the desalination reactor 1 through a first flowing electrode discharge valve a 15;
the wastewater reservoir a4 is connected with the elution water circulation tank a2 through an electrode regeneration reactor elution water feeding pump a 16; an elution water circulation tank discharge valve a17, an elution water circulation tank emptying valve a18 and an electrode regeneration reactor feed valve a19 are arranged on the washing and dewatering circulation tank a 2;
the electrode regeneration reactor feed valve a19 of the elution water circulation tank a2 is connected with the electrode regeneration reactor 2 through an electrode regeneration reactor feed pump a20 and is connected with the feed inlet of the elution water storage chamber of the electrode regeneration reactor 2, and the discharge outlet of the elution water storage chamber of the electrode regeneration reactor 2 is connected with the elution water circulation tank a2 through a reactor elution water discharge valve a 21;
the discharge ports of the cation desorption chamber and the anion desorption chamber of the electrode regeneration reactor 2 are respectively provided with a second anode chamber flowing electrode flow regulating valve a22 and a second cathode chamber flowing electrode flow regulating valve a23, the second anode chamber flowing electrode flow regulating valve a22 and the second cathode chamber flowing electrode flow regulating valve a23 are connected with a second flowing electrode feed valve a25 of the flowing electrode stirring kettle a3 through a second flowing electrode feed pump a24, and the second flowing electrode feed pump a24 is connected with the cation desorption chamber and the feed port of the anion desorption chamber of the electrode regeneration reactor 2 through a second flowing electrode discharge valve a 26;
wherein the wastewater reservoir a4 is connected to the desalination reactor wastewater feed pump a5 via desalination reactor wastewater recycle tank feed valve a27, and the wastewater reservoir a4 is connected to the desalination reactor wastewater feed pump a5 via electrode regeneration reactor effluent recycle tank feed valve a 28; and a flowing electrode stirring kettle emptying valve a29 is also arranged on the flowing electrode stirring kettle a 3.
According to another aspect of the present invention, there is provided a method for intermittently desalting contaminated water, comprising:
injecting an electric plasma liquid circulating between the desalting reactor 1 and the electrode regeneration reactor 2 and charging the electric plasma liquid;
driving the sewage to flow through a sewage storage chamber of the desalination reactor 1, and performing a flowing electrode capacitive deionization reaction in the desalination reactor 1 to adsorb anions and cations in the sewage into the electrolyte solution;
driving the elution water to flow through the elution water storage chamber of the electrode regeneration reactor 2 and generating an electrode regeneration reaction in the electrode regeneration reactor 2 so as to desorb the anions and cations in the electrolyte solution into the elution water.
Specifically, the intermittent desalination method of sewage is implemented based on the above-mentioned intermittent desalination equipment, and its specific implementation process is:
installing a desalting reactor 1 and an electrode regeneration reactor 2, putting a first electrode, a second electrode, a first ion exchange membrane, a second ion exchange membrane, a third ion exchange membrane and a fourth ion exchange membrane of the desalting reactor 1 and the electrode regeneration reactor 2 into the desalting reactor 1 and the electrode regeneration reactor 2, tightening the first electrode, the second electrode, the first ion exchange membrane, the second ion exchange membrane, the third ion exchange membrane and the fourth ion exchange membrane by screws to prepare an electric slurry, uniformly stirring the electric slurry until standing does not generate layering, and introducing the electric slurry into a flow electrode stirring kettle a 3.
Closing a feed valve of an elution water circulation tank a2 of the electrode regeneration reactor 2, opening a feed valve of a sewage circulation tank a1 of the desalination reactor 1, starting a sewage feed pump a5 of the desalination reactor, adjusting the flow rate to be stable (example 15mL/min), and feeding a sample into a sewage circulation tank a1 of the FCDI desalination reactor 1;
when the desalination reactor 1 sewage circulation tank a1 is full, closing the desalination reactor sewage feeding pump a5, closing the feeding valve of the FCDI desalination reactor 1 sewage circulation tank a1, opening the feeding valve of the electrode regeneration reactor 2 elution water circulation tank a2, starting the electrode regeneration reactor 2 elution water feeding pump, and starting to feed the electrode regeneration reactor 2 elution water circulation tank a 2;
when the electrode regeneration reactor 2 elution water circulation tank a2 is full, the electrode regeneration reactor 2 elution water feeding pump is closed, and the electrode regeneration reactor 2 elution water circulation tank a2 feeding valve is closed;
opening a first anode flow electrode flow regulating valve a11, a first cathode flow electrode flow regulating valve a12, a second anode flow electrode flow regulating valve a22 and a second cathode flow electrode flow regulating valve a23, opening a first flow electrode feed valve a14 and a first flow electrode discharge valve a15, starting a first flow electrode feed pump a13, regulating the flow stability (example 60mL/min), when the plasma flows out from the loop, opening a desalination reactor feed valve a8, opening a reactor sewage discharge valve a10, starting a desalination reactor feed pump a9, regulating the flow stability (example 15mL/min), when the water flows out from the loop, opening the power supply of the desalination reactor 1, and starting adsorption;
the second flow electrode feed valve a25 and second flow electrode discharge valve a15 were opened and the second flow electrode feed pump a24 was started and the regulated flow stabilized (example 60 mL/min). When plasma flows out of the loop, the electrode regeneration reactor feed valve a19 is opened, the reactor effluent discharge valve a21 is opened, the electrode regeneration reactor feed pump a20 is started, and the regulated flow rate is stable (example 15 mL/min). When the elution water flows out of the loop, the power supply of the electrode regeneration reactor 2 is turned on to start regeneration;
starting the flow electrode stirring kettle a3 to start stirring, monitoring the sewage circulating tank a1 of the desalination reactor 1 and the elution water circulating tank a2 of the electrode regeneration reactor 2, opening the corresponding discharge valve when reaching the discharge standard, discharging water samples, closing the discharge valve, opening the feed valve to start feeding again, and continuing intermittent production.
The mineralization degree is detected regularly in the implementation process, and the detection information is shown in table 1.
TABLE 1 intermittent mineralization information table
| Time | Degree of mineralization | Time | Degree of mineralization | Time | Degree of mineralization | Time | Degree of mineralization | Time | Degree of |
| 0 | 1659 | 70 | 1192 | 140 | 820 | 210 | 530 | 280 | 359 |
| 10 | 1573 | 80 | 1128 | 150 | 754 | 220 | 497 | 290 | 326 |
| 20 | 1541 | 90 | 1079 | 160 | 712 | 230 | 469 | 300 | 303 |
| 30 | 1454 | 100 | 1005 | 170 | 665 | 240 | 443 | 310 | 281 |
| 40 | 1383 | 110 | 941 | 180 | 635 | 250 | 421 | 320 | 267 |
| 50 | 1354 | 120 | 926 | 190 | 618 | 260 | 393 | 330 | 246 |
| 60 | 1241 | 130 | 862 | 200 | 565 | 270 | 387 | 340 | 229 |
Wherein, the time unit is min, and the mineralization degree unit is mg/L;
in addition, the desalination curve is shown in FIG. 6, which can reduce the amount of sewage at 1700mg/L to 200mg/L in a certain period of time, and the desalination rate is 86.4%.
According to another aspect of the present invention, there is provided a continuous type sewage desalination apparatus comprising:
the electrode regeneration reactor 2 and the desalination reactors 1 are arranged in sequence according to the sewage conveying direction;
a sewage buffer tank b1 capable of storing sewage and supplying into the desalination reactor 1;
an elution water circulation tank b2 capable of storing elution water from the electrode regeneration reactor 2 and resupplying it to the electrode regeneration reactor 2;
a flow electrode reservoir b3 capable of storing and providing the electro-slurry liquid to the desalination reactor 1 and receiving and storing the electro-slurry liquid output by the electrode regeneration reactor 2.
Specifically, in the plurality of desalination reactors 1, the sewage storage chamber of the nth desalination reactor 1 communicates with the sewage storage chamber of the (n + 1) th desalination reactor 1, the cation adsorption chamber of the nth desalination reactor 1 communicates with the cation adsorption chamber of the (n + 1) th desalination reactor 1, and the anion adsorption chamber of the nth desalination reactor 1 communicates with the anion adsorption chamber of the (n + 1) th desalination reactor 1. Wherein n is a natural number greater than or equal to 1. A plurality of the desalination reactors 1 are fastened and fixed by screws.
Further, n is a natural number of 1 or more and 19 or less, and the number of the plurality of desalination reactors 1 is 20.
The continuous type sewage desalination apparatus further comprises a sewage reservoir b4, wherein the sewage reservoir b4 is connected with the sewage buffer tank b1 through a desalination reactor buffer tank feeding pump b 5; a sewage buffer tank emptying valve b6, a desalination reactor feed valve b7 and a desalination reactor buffer tank feed valve b8 are arranged on the sewage buffer tank b1, and the desalination reactor buffer tank feed pump b5 is connected with the sewage buffer tank b1 through the desalination reactor buffer tank feed valve b 8;
the desalting reactor feed valve b7 of the wastewater buffer tank b1 is connected with the feed inlet of the first desalting reactor 1 through a desalting reactor feed pump b9 and the wastewater storage chamber of the first desalting reactor 1; the discharge ports of the cation adsorption chamber and the anion adsorption chamber of the first desalination reactor 1 are respectively communicated with the feed ports of the cation adsorption chamber and the anion adsorption chamber of the next desalination reactor 1 through pipelines, that is, the sewage storage chamber of the nth desalination reactor 1 is communicated with the sewage storage chamber of the (n + 1) th desalination reactor 1, the cation adsorption chamber of the nth desalination reactor 1 is communicated with the cation adsorption chamber of the (n + 1) th desalination reactor 1, and the anion adsorption chamber of the nth desalination reactor 1 is communicated with the anion adsorption chamber of the (n + 1) th desalination reactor 1. Wherein n is a natural number greater than or equal to 1;
wherein, the feed inlets of the cation adsorption chamber and the anion adsorption chamber of the first desalting reactor 1 are connected with the desalting reactor flow electrode feed valve b11 of the flow electrode storage tank b3 through a reactor flow electrode feed pump b 10; the flow electrode tank b3 is also provided with a flow electrode introducing valve b12 and a flow electrode tank emptying valve b 13; the discharge port of the sewage storage chamber of the last desalting reactor 1 is connected with a reactor sewage discharge valve b14, and the discharge ports of the cation adsorption chamber and the anion adsorption chamber of the last desalting reactor 1 are connected with a reactor flow electrode discharge valve b15 of the flow electrode storage tank b 3;
the sewage reservoir b4 is connected with the elution water circulation tank b2 through an electrode regeneration reactor elution water circulation tank feed pump b 16; an electrode regeneration reactor flowing electrode washing and dewatering discharge valve b17, an electrode regeneration reactor eluting water circulation tank emptying valve b18, an electrode regeneration reactor eluting water feeding valve b19 and an electrode regeneration reactor eluting water circulation tank discharge valve b20 are arranged on the washing and dewatering circulation tank b2, and an electrode regeneration reactor eluting water circulation tank feeding pump b16 is connected with the eluting water circulation tank b2 through an electrode regeneration reactor eluting water circulation tank feeding valve b 22;
an electrode regeneration reactor elution water feeding valve b19 of the elution water circulation tank b2 is connected with the electrode regeneration reactor 2 through an electrode regeneration reactor elution water feeding pump b21 to a feeding hole of an elution water storage chamber of the electrode regeneration reactor 2, and a discharging hole of the elution water storage chamber of the electrode regeneration reactor 2 is connected with the elution water circulation tank b2 through an electrode regeneration reactor flowing electrode elution water discharging valve b 17;
the discharge ports of the cation desorption chamber and the anion desorption chamber of the electrode regeneration reactor 2 are connected with the flowing electrode storage tank b3 through an electrode regeneration reactor flowing electrode discharge valve b23, the feed ports of the cation desorption chamber and the anion desorption chamber of the electrode regeneration reactor 2 are connected with an electrode regeneration reactor flowing electrode feed pump b24 of the flowing electrode storage tank b3, and the electrode regeneration reactor flowing electrode feed pump b24 is connected with the flowing electrode storage tank b3 through an electrode regeneration reactor flowing electrode feed valve b 25.
Referring to fig. 7, according to another aspect of the present invention, there is provided a continuous desalination method of polluted water, comprising:
injecting an electric plasma liquid circulating between the plurality of desalination reactors 1 and the electrode regeneration reactor 2 and charging the electric plasma liquid;
driving the sewage to sequentially flow through the sewage storage chambers of the plurality of desalination reactors 1, and performing a plurality of flowing electrode capacitive deionization reactions in the plurality of desalination reactors 1 to adsorb anions and cations in the sewage into the electrolyte solution;
driving the elution water to flow through the elution water storage chamber of the electrode regeneration reactor 2 and generating an electrode regeneration reaction in the electrode regeneration reactor 2 so as to desorb the anions and cations in the electrolyte solution into the elution water.
Specifically, the continuous desalination method of sewage is implemented based on the continuous desalination equipment, and the specific implementation process comprises the following steps:
installing a desalting reactor 1 and an electrode regeneration reactor 2, putting a first electrode, a second electrode, a first ion exchange membrane, a second ion exchange membrane, a third ion exchange membrane and a fourth ion exchange membrane of the desalting reactor 1 and the electrode regeneration reactor 2 into the desalting reactor 1 and the electrode regeneration reactor 2, tightening the reactors with screws, and simultaneously connecting a plurality of desalting reactors 1;
preparing electric slurry, uniformly stirring until standing still and no layering occurs, and introducing into a flowing electrode storage tank b 3;
the desalting reactor buffer tank feed valve b8 and the electrode regeneration reactor 2 elution water circulation tank b2 feed valve are opened, the desalting reactor buffer tank feed pump b5 and the electrode regeneration reactor elution water circulation tank feed pump b16 are started, the flow is regulated to be stable (example 15mL/min), and samples are fed into the sewage buffer tank b1 and the elution water circulation tank b 2.
When the elution water circulation tank b2 is full, the feeding valve of the elution water circulation tank b2 of the electrode regeneration reactor 2 and the feeding pump b16 of the elution water circulation tank of the electrode regeneration reactor are closed;
the desalination reactor flow electrode feed valve b11, reactor flow electrode discharge valve b15, electrode regeneration reactor flow electrode feed valve b25, electrode regeneration reactor flow electrode discharge valve b23 were opened. Starting the reactor flow electrode feeding pump b10 and the electrode regeneration reactor flow electrode feeding pump b24, and adjusting the flow rate to be stable (example 60 mL/min);
when the electrolyte solution flows out of the loop, the desalination reactor 1 is opened for feeding, the reactor sewage discharge valve b14, the electrode regeneration reactor eluting water feed valve b19 and the electrode regeneration reactor flowing electrode eluting water discharge valve b17 are opened;
starting a desalting reactor feed pump b9 and an electrode regeneration reactor eluting water feed pump b21, adjusting the flow rate to be stable (example 15mL/min), turning on the power supplies of a plurality of desalting reactors 1 and electrode regeneration reactors 2 when water is left in a loop, and starting adsorption and regeneration.
When the elution water circulation tank b2 reaches the discharge standard, opening the discharge valve b20 of the elution water circulation tank of the electrode regeneration reactor for recycling, washing and dehydrating, restarting a pump to inject water into the tank, and realizing the intermittent regeneration operation of the electrode regeneration reactor 2; when the discharged water of the reactor sewage discharge valve b14 reaches the discharge standard, the discharged water is discharged, and the discharged water is led back to the sewage reservoir b4 when the discharge standard is not reached.
Furthermore, a plurality of desalination reactors 1 are sequentially arranged according to the sewage conveying direction to form a continuous desalination reactor 1.
In the implementation process, the mineralization degree of the inlet and the outlet of each stage of the desalting reactor 1 is detected, and the detection information is shown in table 2.
TABLE 2 continuous mineralization information table
Wherein the unit of the degree of mineralization is mg/L; when the number of the continuous FCDI reactor stages is 20, the desalting rate of the discharged sewage can reach 95%.
The electrode regeneration reactors 2 related to all the process flows provided by the invention are the same, the mineralization degree of the elution water is about 1800mg/L for concentration, the mineralization degree of the elution water is increased from 1834mg/L to 4420mg/L within 120min, and the concentration is about 2.4 times.
The invention has reasonable and ingenious structural design, the sewage desalting device can continuously produce, can simultaneously carry out adsorption and desorption operations of anions and cations, has high efficiency, and the electric serous fluid can be circulated after desorption, thereby effectively reducing the cost. The process is mature, the operable desalination process and device based on the FCDI technology are provided, the technical characteristics of safety, low energy consumption, continuity and stability of the flow electrode capacitance deionization technology are fully reflected, the problems of high cost, low efficiency and incapability of being applied to actual environment treatment of industrial wastewater, municipal sewage and the like are solved, and the wastewater desalination device and equipment which can be continuously produced and operated are provided; the sewage desalting device, the intermittent sewage desalting equipment and the continuous sewage desalting equipment have wide application scenes, are flexible to adjust, are convenient to allocate according to operation requirements, have simple core device structures, are convenient to process on a large scale, have high structural generalization degree of the core device, are close to standardized parts, and are convenient to improve the treatment capacity; in addition, the desalting rate is high, the overall average efficiency is close to 90%, the sewage desalting can be realized, the salt enrichment is realized, and the resources are recycled; meanwhile, the method has high efficiency and no pollution, is an environment-friendly new process and device, and is beneficial to popularization and use.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should also be understood that, in the embodiment of the present invention, the term "and/or" is only one kind of association relation describing an associated object, and means that three kinds of relations may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A sewage desalination apparatus, comprising:
a desalting reactor having an electric slurry liquid in which anions and cations in sewage can be adsorbed by a flow electrode capacitive deionization reaction;
an electrode regeneration reactor connected with the desalination reactor and capable of regenerating the electrolyte solution through an electrode regeneration reaction to desorb the anions and cations into elution water;
wherein, the electric serous fluid and the sewage and the electric serous fluid and the washing and dewatering room are separated by an ion exchange structure.
2. The desalination apparatus of claim 1, wherein the desalination reactor comprises:
a cation adsorption chamber capable of housing the electrolyte solution;
a sewage storage chamber connected to the cation adsorption chamber and capable of storing the sewage;
an anion adsorption chamber connected to the sewage storage chamber and capable of containing the electrolyte solution;
the ion exchange structure comprises a first ion exchange membrane and a second ion exchange membrane, the junction of the cation adsorption chamber and the sewage storage chamber is separated by the first ion exchange membrane, and the junction of the anion adsorption chamber and the sewage storage chamber is separated by the second ion exchange membrane.
3. The desalination apparatus of claim 2, further comprising:
the first electrode fixing plate is provided with a first electrode cavity and can accommodate a first electrode plate;
a first reaction chamber frame plate connected to the first electrode fixing plate, the cation adsorption chamber being disposed in the first reaction chamber frame plate;
a second reaction chamber frame plate connected to the first reaction chamber frame plate, the sewage storage chamber being provided in the second reaction chamber frame plate;
a third reaction chamber frame plate connected to the second reaction chamber frame plate, the anion adsorption chamber being provided in the third reaction chamber frame plate;
the second electrode fixing plate is provided with a second electrode cavity and can contain a second electrode plate;
the first electrode cavity is communicated with the cation adsorption chamber, and the second electrode cavity is communicated with the anion adsorption chamber.
4. The desalination apparatus for wastewater according to claim 3, wherein the cation adsorption chamber, the wastewater storage chamber, and the anion adsorption chamber are respectively provided with a plurality of first baffle plates, second baffle plates, and third baffle plates.
5. The desalination apparatus of claim 2, wherein the electrode regeneration reactor comprises:
a cation desorption chamber capable of containing the electro-slurry liquid which adsorbs anions and cations in the sewage;
an elution water storage chamber connected to the cation desorption chamber and capable of storing the elution water;
an anion desorption chamber connected to the eluent storage chamber and capable of holding the electrolytic bath having adsorbed anions and cations in the sewage;
wherein the junction of the cation desorption chamber and the eluted water storage chamber is separated by a third ion exchange membrane, and the junction of the anion desorption chamber and the eluted water storage chamber is separated by a fourth ion exchange membrane.
6. The apparatus for desalinating sewage according to claim 5, wherein the cation adsorption chamber, the sewage storage chamber, the anion adsorption chamber, the cation desorption chamber, the eluted water storage chamber, and the anion desorption chamber are provided with a feed inlet and a discharge outlet.
7. A batch-type sewage desalination apparatus, comprising:
a wastewater desalination apparatus according to any one of claims 1 to 6;
a wastewater circulation tank capable of storing wastewater from the desalination reactor and resupplying the wastewater into the desalination reactor;
an elution water circulation tank capable of storing elution water from the electrode regeneration reactor and resupplying the same to the electrode regeneration reactor;
and a flow electrode agitation tank capable of storing and agitating the slurry solution from the desalination reactor and transferring the slurry solution to the electrode regeneration reactor, and storing and agitating the slurry solution from the electrode regeneration reactor and transferring the slurry solution to the desalination reactor.
8. A continuous-type sewage desalination apparatus, comprising:
the device comprises an electrode regeneration reactor and a plurality of desalination reactors, wherein the desalination reactors are sequentially arranged according to the sewage conveying direction;
the desalting reactor is provided with an electric serous fluid, and anions and cations in the sewage can be absorbed in the electric serous fluid through flowing electrode capacitive deionization reaction;
the electrode regeneration reactor is connected with the desalination reactor and can regenerate the electric serous fluid through electrode regeneration reaction so as to desorb the negative ions and the positive ions into elution water;
wherein the electric serous fluid and the sewage and the electric serous fluid and the washing and dewatering room are separated by an ion exchange structure;
a sewage buffer tank capable of storing sewage and supplying into the desalination reactor;
an elution water circulation tank capable of storing elution water from the electrode regeneration reactor and resupplying the same to the electrode regeneration reactor;
a flow electrode reservoir capable of storing and providing a plasma liquid to the desalination reactor and receiving and storing the electro-slurry liquid output by the electrode regeneration reactor.
9. A method for intermittent desalination of contaminated water, comprising:
injecting an electric slurry circulating between the desalting reactor and the electrode regeneration reactor and charging the electric slurry;
driving the sewage to flow through a sewage storage chamber of the desalting reactor, and generating a flowing electrode capacitance deionization reaction in the desalting reactor so as to adsorb anions and cations in the sewage into the electrolyte solution;
driving elution water to flow through an elution water storage chamber of the electrode regeneration reactor and generating an electrode regeneration reaction in the electrode regeneration reactor so as to desorb anions and cations in the electrolyte solution into the elution water.
10. A method for continuous desalination of contaminated water, comprising:
injecting the electric slurry which circularly flows among a plurality of desalting reactors and electrode regeneration reactors and electrifying the electric slurry;
driving the sewage to sequentially flow through sewage storage chambers of a plurality of desalting reactors, and carrying out a plurality of flowing electrode capacitive deionization reactions in the plurality of desalting reactors so as to adsorb anions and cations in the sewage into the electrolyte solution;
driving elution water to flow through an elution water storage chamber of the electrode regeneration reactor and generating an electrode regeneration reaction in the electrode regeneration reactor so as to desorb anions and cations in the electrolyte solution into the elution water.
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Application publication date: 20210903 |