Self-electro-driven device for synchronous desalination of desulfurization wastewater by means of degradation, and method for using same

Abstract

Disclosed in the present invention is a self-electro-driven device for synchronous desalination of desulfurization wastewater by means of degradation. The device comprises a cylindrical cavity, the interior of which is divided into an upper cavity and a lower cavity, wherein the interior of the upper cavity serves as a first chamber, which is used for the electro-adsorption of cations and anions in desulfurization wastewater and the regeneration of membranes; the interior of the lower cavity comprises a second inner chamber, which is used for microbial degradation of organic matter, realizing the degradation of organic substances in biological wastewater while generating electrons and protons; an annular space outside the second inner chamber serves as a second outer chamber, which is used by electron acceptors to receive electrons and be reduced; and a proton membrane is disposed at the lower end of the second inner chamber and is in communication with the second outer chamber to prevent excessive proton accumulation. Further disclosed in the present invention is a method for using the self-electro-driven device for synchronous desalination of desulfurization wastewater by means of degradation. The problems of high energy consumption, high difficulty in terms of operation and maintenance, and high costs in existing desulfurization wastewater treatment processes are solved.

Description

Degradation of self-electrically driven desulfurization wastewater simultaneous desalination device and its operation method Technical Field

[0001] This invention belongs to the field of high-salinity wastewater treatment technology, specifically relating to a device for simultaneous desalination of desulfurization wastewater driven by electric degradation, and also relating to a method of using the device for simultaneous desalination of desulfurization wastewater driven by electric degradation. Background Technology

[0002] Desulfurization wastewater, as the final wastewater from coal-fired power plants, contains high levels of suspended solids and various heavy metals, as well as salt concentrations reaching tens of thousands of kJ / L. Effective front-end treatment and disposal of desulfurization wastewater is crucial for achieving "zero discharge" technology. Traditional triplex tank processes involve huge investments and land occupation, cause severe secondary pollution, and are difficult to effectively recover resources, thus failing to meet increasingly stringent environmental protection requirements. Meanwhile, the mainstream zero-discharge concentration and reduction processes, such as evaporation and membrane methods, suffer from high operation and maintenance costs, high energy consumption, and severe structural corrosion.

[0003] Capacitive deionization (EDI) technology, as a novel desalination technology, utilizes the ionization of salts in high-salinity wastewater, where they exist in solution as positive and negative ions carrying the same electrons. When desulfurization wastewater flows through electrode plates loaded with porous adsorbent material under an applied electric field, an electric double layer forms on the carbon material of the electrode plates. Ions are attracted by this double layer and migrate directionally to the pores of the carbon material on the oppositely charged electrode plates. In other words, when desulfurization wastewater passes through the two electrodes powered by an external power source, positively charged cations migrate directionally towards the negatively charged cathode, while anions migrate towards the oppositely charged anode. When the electrode plates reach adsorption saturation, regeneration can be achieved simply by disconnecting the power supply or applying a reverse voltage. This technology offers advantages such as high tolerance, low energy consumption, no secondary pollution, and high water utilization. However, it does not completely solve the problem of energy consumption reduction, as a certain voltage and electrical energy are still required, thus not achieving truly zero-energy desalination.

[0004] Microbial desalination electrolyzers (MDCs), as a bioelectrochemical desalination technology, evolved from microbial fuel cells. At the anode, active electrodes with attached electrogenic microorganisms degrade organic pollutants within the anode chamber, simultaneously generating electrons and protons. Electrons travel through an external circuit to the cathode, where protons generated by hydrolysis accept electrons and are reduced, combining with oxygen on the air cathode to form water and release hydroxide ions. The electric field between the anode and cathode drives salt ions in high-salt wastewater to migrate through the cation and anion membranes, achieving reverse osmosis migration of cations and anions without the need for external power, simultaneously treating organic matter in the wastewater. This achieves simultaneous desalination of organic matter by microorganisms. However, its desalination technology relies on ion exchange membranes to transfer ions to the anode and anion chambers of the bio-cell. Reverse osmosis membranes have high maintenance costs, and the migration of ions to the microbial anode chamber creates a high-salt environment. MDC microorganisms require modification, screening, and cultivation in a relatively harsh high-salt environment, increasing operational difficulty and cost. Summary of the Invention

[0005] The purpose of this invention is to provide a self-electrically driven desulfurization wastewater simultaneous desalination device to solve the problems of high energy consumption, operation and maintenance difficulty and high cost in the existing desulfurization wastewater treatment process.

[0006] The present invention also aims to provide a method for using a device for simultaneous desalination of self-electrically driven desulfurization wastewater.

[0007] The first technical solution adopted in this invention is a self-electrically driven desulfurization wastewater simultaneous desalination device, comprising a cylindrical cavity, the interior of which is divided into upper and lower cavities. The upper cavity contains a first chamber, which is used for the electro-adsorption of anions and cations from the desulfurization wastewater and membrane regeneration. The lower cavity contains a second inner chamber, which is used for microbial degradation of organic matter, realizing the degradation of organic matter in biological wastewater, while simultaneously generating electrons and protons. The outer periphery of the second inner chamber is a second outer chamber, which is used for electron acceptors to accept electrons and be reduced. A proton membrane is installed at the lower end of the second inner chamber, and the proton membrane leads to the second outer chamber to avoid excessive accumulation of protons.

[0008] Preferably, a partition is provided between the upper and lower cavities, separating the first chamber from the second inner chamber. A titanium rod is suspended from the central axis of the first chamber, passing through the partition and extending into the second inner chamber. This allows electrons generated after the decomposition of organic matter in the second inner chamber to be directly transferred to the first chamber via the titanium rod. A graphite brush is provided at one end of the titanium rod that enters the second inner chamber, and the graphite brush enables the directional domestication of electrogenic bacteria.

[0009] Preferably, two inlets I are provided on the lower side of one side of the first chamber. The two inlets I are connected to inlet pipe a and inlet pipe b, respectively. Inlet pipe a is connected to lift pump a. Inlet valve a is provided upstream of inlet pipe a. Inlet pipe b is connected to lift pump b. Inlet valve b is provided on inlet pipe b. The ends of inlet pipe a and inlet pipe b are combined into one and connected to desulfurization wastewater pipe. Two outlets I are provided on the upper side of the other side of the first chamber. The two outlets I are connected to outlet pipe a and outlet pipe b, respectively. One outlet pipe a is provided with outlet valve a, and desalination is achieved by controlling the water output through outlet valve a. The other outlet pipe b is provided with outlet valve b, and the electroactive material is regenerated by the water output through outlet valve b.

[0010] Preferably, an inlet II is opened on the lower side of one side of the second inner chamber, and inlet II is connected to an inlet pipe c. An inlet valve c is installed on the inlet pipe c. The inlet pipe c extends through the outside of the second outer chamber and is connected to a domestic sewage pipe. An outlet II is opened on the upper side of the other side of the second inner chamber, and outlet II is connected to an outlet pipe c. An outlet valve c is installed on the outlet pipe c. Domestic sewage enters the second inner chamber through the inlet valve c and the inlet pipe c, and exits through the outlet pipe c to achieve degradation.

[0011] Preferably, an inlet Ⅲ is provided on the lower side of one side of the second outer chamber, and inlet Ⅲ is located below inlet Ⅱ. Inlet Ⅲ is connected to inlet pipe d, and inlet valve d is provided on inlet pipe d. Inlet pipe d is connected to inlet pipeline, and heavy metal wastewater or potassium ferricyanide solution flows in inlet pipeline. An outlet Ⅲ is provided on the upper side of the other side of the second outer chamber, and outlet Ⅲ is located above outlet Ⅱ. Outlet Ⅲ is connected to outlet pipe d, and outlet valve d is provided on outlet pipe d. The liquid in the second outer chamber 3 is discharged through outlet pipe d.

[0012] Preferably, the first chamber and the second outer chamber share the same inner wall, both made of titanium metal, to enable the effective transmission of electrons generated in the second inner chamber to the external circuit; electrons are transmitted from the inner wall of the first chamber to the inner wall of the second outer chamber, where electron acceptors are reduced; the inner wall of the first chamber and the outer wall of the titanium rod located in the first chamber carry opposite charges, forming a double-layer capacitor.

[0013] Preferably, a sealing ring is fitted into the partition where the titanium rod is inserted.

[0014] Preferably, the inner wall of the first chamber and the outer wall of the titanium rod located in the first chamber are both coated with activated carbon powder.

[0015] Preferably, the inner wall of the first chamber is connected to the titanium rod via a wire, a self-driven circuit switch is installed on the wire, the wire is connected to the auxiliary power supply of the self-driven circuit, the auxiliary power supply of the self-driven circuit is used to adjust the load, an automatic monitoring device is installed on the self-driven circuit, and a backup power supply is connected to the inner wall of the first chamber 1 and the titanium rod via a wire, the backup power supply is in an open circuit state when it is running.

[0016] The second technical solution adopted in this invention is a method for using the self-degrading electric-driven desulfurization wastewater simultaneous desalination device. The device is implemented according to the following steps:

[0017] Normal operation is as follows: disconnect the backup power supply and disconnect the auxiliary power switch of the self-driven circuit; open the domestic sewage inlet valve c and outlet valve c to control the domestic sewage to enter the second inner chamber; open the inlet valve d and outlet valve d to control the inlet valve in the inlet pipeline to enter the second outer chamber; the organic matter in the domestic sewage in the second inner chamber is degraded by electrogenic bacteria attached to the graphite brush, generating electrons and protons; the electrons pass through the titanium rod in the second inner chamber, through the partition, and are directly transferred to the titanium rod in the first chamber;

[0018] The electrons are transmitted through an external circuit to the inner wall of the first chamber cylinder, through a partition to the inner wall of the second outer chamber cylinder. The electron acceptor accepts electrons to form a closed loop. At the same time, heavy metal ions are reduced and attached to the inner wall, and the inner wall is cleaned regularly.

[0019] The first chamber regeneration inlet valve b and outlet valve b are closed; the working inlet valve a and outlet valve a are opened. The pretreated desulfurization wastewater flows into the first chamber through inlet I via inlet pipe a connected to lift pump a. At this time, a negative charge is induced at the titanium rod, and the cations in the desulfurization wastewater are adsorbed on the active material of the titanium rod; a positive charge is induced at the inner wall titanium cylinder, and the anions in the wastewater migrate in a directional manner and are adsorbed on the active material of the inner wall titanium cylinder; the purified water is discharged through outlet pipe a controlled by outlet valve a. During the operation, the self-driven circuit auxiliary power supply is automatically monitored and adjusted according to the quality and quantity of domestic sewage. During the replenishment process, the auxiliary circuit switch automatically closes.

[0020] The regeneration process is as follows: disconnect the backup power supply and disconnect the auxiliary power switch of the self-driven circuit; close the inlet valve c and outlet valve c to prevent domestic sewage from entering the second inner chamber; close the inlet valve d and outlet valve d to prevent metal wastewater or potassium ferricyanide solution from entering the second outer chamber. At this time, the electric field in the first chamber disappears and there is no induced charge; the regeneration inlet valve b and outlet valve b of the first chamber are opened; the working inlet valve a and outlet valve a are closed, and the pretreated desulfurization wastewater enters the first chamber through the inlet pipe b connected to the lift pump b. The anions and cations attached to the electroactive material are desorbed and discharged from the outlet pipe b controlled by the outlet valve b with the regeneration salt to form a regeneration concentrated solution.

[0021] Alternative operating procedure: Turn on the backup power supply, disconnect the auxiliary power switch of the self-driven circuit, close the inlet valve c and outlet valve c to prevent water from entering the second inner chamber; close the inlet valve d and outlet valve d to prevent metal wastewater or potassium ferricyanide solution from entering the second outer chamber; open the inlet valve a and outlet valve a connected to the first chamber, and close the regeneration inlet valve b and outlet valve b. This is the alternative solution when there is no domestic sewage to be treated, which is the traditional electro-adsorption process.

[0022] Reverse regeneration alternative process: Reverse turn on the backup power supply and turn off the auxiliary power switch of the self-driven circuit; close the inlet valve c and outlet valve c to prevent water from entering the second inner chamber; close the inlet valve d and outlet valve d to prevent metal wastewater or potassium ferricyanide solution from entering the second outer chamber, and close the working inlet valve a and outlet valve a of the first chamber; open the regeneration inlet valve b and outlet valve b. This is the traditional electroadsorption regeneration process, an alternative solution that requires periodic full regeneration after the electroactive material has been running for several weeks.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] This invention relates to a self-electrically driven desulfurization wastewater simultaneous desalination device. The device features independently separated chambers, directly enabling electron transfer without requiring modification, screening, or cultivation of microorganisms in a high-salt environment, significantly reducing operation and maintenance complexity. Simultaneously, the desulfurization wastewater separation process does not involve ion exchange membranes, reducing membrane maintenance costs and greatly lowering the requirements for wastewater pretreatment processes. It achieves directional electroadsorption of anions and cations without external voltage, simultaneously degrading other wastewater pollutants in the plant area. This enables integrated simultaneous degradation of various types of wastewater from thermal power plants with zero energy consumption. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the structure of the self-electrically driven desulfurization wastewater synchronous desalination device of the present invention.

[0027] In the diagram, 1. First chamber, 2. Second inner chamber, 3. Second outer chamber, 4. Desulfurization wastewater pipe, 5. Inlet valve a, 6. Inlet valve b, 7. Booster pump a, 8. Booster pump b, 9. Inlet pipe a, 10. Inlet pipe b, 11. Titanium rod, 12. Graphite carbon brush, 13. Sealing ring, 14. Activated carbon powder, 15. Outlet pipe a, 16. Outlet pipe b, 17. Inlet pipeline, 18. Inlet valve d, 19. Inlet valve c, 20. Domestic sewage pipe, 21. Inlet pipe c, 22. Inlet pipe d, 23. Outlet valve c, 24. Outlet valve d, 25. Outlet pipe d, 26. Self-driven circuit switch, 27. Backup power supply, 28. Self-driven circuit auxiliary power supply, 29. Proton exchange membrane, 30. Outlet pipe c, 31. Outlet valve a, 32. Outlet valve b, 33. Isolation. Embodiments of the present invention

[0028] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] The structure of the electro-driven desulfurization wastewater simultaneous desalination device of the present invention is shown in Figure 1. It includes a cylindrical cavity, which is divided into upper and lower cavities. The upper cavity contains a first chamber 1, which is used for the electro-adsorption of anions and cations in the desulfurization wastewater and membrane regeneration. The lower cavity contains a second inner chamber 2, which is used for microbial degradation of organic matter, realizing the degradation of organic matter in biological wastewater, and generating electrons and protons at the same time. The second inner chamber 2 is surrounded by a second outer chamber 3, which is used for electron acceptors to accept electrons and be reduced. A proton membrane 29 is set at the lower end of the second inner chamber 2, which leads to the second outer chamber 3 to avoid excessive accumulation of protons.

[0032] A partition 33 is provided between the upper and lower cavities, separating the first chamber 1 and the second inner chamber 2. The partition 33 is a plate-shaped structure made of polytetrafluoroethylene. A titanium rod 11 is suspended along the central axis of the first chamber 1. The titanium rod 11 passes through the partition 33 and extends into the second inner chamber 2, so that the electrons generated after the decomposition of organic matter in the second inner chamber 2 can be directly transferred to the first chamber 1 through the titanium rod 11. A graphite brush 12 is provided at one end of the titanium rod 11 that enters the second inner chamber 2. The graphite brush 12 has been used to directionally cultivate electrogenic bacteria.

[0033] Example 2

[0034] Two inlets I are located on one side of the first chamber 1. The two inlets I are connected to inlet pipe a9 and inlet pipe b10, respectively. Inlet pipe a9 is connected to lift pump a7 and is equipped with inlet valve a5. Inlet pipe b10 is connected to lift pump b8 and is equipped with inlet valve b6. The pretreated desulfurization wastewater enters the two inlets I of the first chamber 1 through two branches via desulfurization wastewater pipe 4. Two outlets I are located on the other side of the first chamber 1. The two outlets I are connected to outlet pipe a15 and outlet pipe b16, respectively. One outlet pipe a15 is equipped with outlet valve a31, which controls the water output to achieve desalination. The other outlet pipe b16 is equipped with outlet valve b32, which controls the water output to achieve the regeneration of electroactive materials.

[0035] A water inlet II is opened on one side of the lower part of the second inner chamber 2. The water inlet II is connected to the water inlet pipe c21. A water inlet valve c19 is installed on the water inlet pipe c21. The water inlet pipe c21 passes through and extends out of the second outer chamber 3 and connects to the domestic sewage pipe 20. A water outlet II is opened on the other side of the upper part of the second inner chamber 2. The water outlet II is connected to the water outlet pipe c30. A water outlet valve c23 is installed on the water outlet pipe c30. Domestic sewage enters the second inner chamber 2 through the water inlet valve c19 and the water inlet pipe c21, and exits through the water outlet pipe c30 to achieve degradation.

[0036] A water inlet Ⅲ is located below one side of the second outer chamber 3. The water inlet Ⅲ is located below the water inlet Ⅱ. The water inlet Ⅲ is connected to the water inlet pipe d22. The water inlet pipe d22 is equipped with a water inlet valve d18. The water inlet pipe d22 is connected to the water inlet pipeline 17. Heavy metal wastewater or potassium ferricyanide solution flows in the water inlet pipeline 17. An outlet Ⅲ is located above the other side of the second outer chamber 3. The water outlet Ⅲ is located above the water outlet Ⅱ. The water outlet Ⅲ is connected to the water outlet pipe d25. The water outlet pipe d25 is equipped with a water outlet valve d24. The liquid in the second outer chamber 3 is discharged through the water outlet pipe d25.

[0037] Example 3

[0038] The first chamber 1 and the second outer chamber 3 share the same inner wall, both made of titanium, to enable the effective transmission of electrons generated in the second inner chamber 2 to the external circuit.

[0039] Electrons are transferred from the inner wall of the first chamber 1 to the inner wall of the second outer chamber 3, where electron acceptors are reduced.

[0040] A sealing ring 13 is fitted into the partition 33 through the titanium rod 11 to prevent cross-contamination and microbial contamination between the first chamber 1 and the second inner chamber 2 by different types of wastewater.

[0041] The inner wall of the first chamber 1 and the outer wall of the titanium rod 11 located in the first chamber 1 are both coated with activated carbon powder 14 to increase the adsorption sites for anions and cations.

[0042] The inner wall of the first chamber 1 and the outer wall of the titanium rod 11 located in the first chamber 1 are respectively charged with opposite charges, forming a double-layer capacitor, which can realize the directional migration of anion and cation salt ions in desulfurization wastewater.

[0043] The inner wall of the first chamber 1 is connected to the titanium rod 11 by a wire. The wire is connected to the self-driven circuit auxiliary power supply 28 (model KUAIQU SPPS-C305). A self-driven circuit switch 26 (a conventional power switch) is installed on the wire. The self-driven circuit auxiliary power supply 28 is used to regulate the load. An automatic monitoring device is installed on the self-driven circuit. The automatic monitoring device uses a monitoring multimeter (model UNI-T UT33D). When the flow rate of domestic sewage is small or the concentration of organic matter is low enough to drive directional adsorption, the self-driven circuit auxiliary power supply 28 is activated and potential is supplemented as needed. When the microbial system is electrically driven, the self-driven circuit auxiliary power supply 28 is in an open circuit state.

[0044] The inner wall of the first chamber 1 is connected to the titanium rod 11 via a wire to a backup power supply 27. When the backup power supply 27 is running, it is in an open circuit state. When there is no domestic sewage that needs to be treated, all the inlet and outlet valves of the second outer chamber 3 and the second inner chamber 2 are closed. At this time, the second outer chamber 3 and the second inner chamber 2 are in a shielded state. The backup power supply 27 is then connected. At this time, the device is a common electro-adsorption device.

[0045] Example 4

[0046] The method of using the self-degrading electric-driven desulfurization wastewater simultaneous desalination device of the present invention is implemented according to the following steps:

[0047] Normal operation is as follows: disconnect the backup power supply 27 and the self-driven circuit switch 26; open the domestic sewage inlet valve c19 and outlet valve c23 to control the domestic sewage to enter the second inner chamber 2; open the inlet valve d18 and outlet valve d24 to control the heavy metal wastewater (or potassium ferricyanide solution) in the inlet pipeline 17 to enter the second outer chamber 3; the organic matter in the domestic sewage in the second inner chamber 2 is degraded by the electrogenic bacteria attached to the graphite brush 12, generating electrons and protons; the electrons pass through the titanium rod 11 in the second inner chamber 2, through the partition 33, and are directly transferred to the titanium rod 11 in the first chamber 1;

[0048] The electrons are transmitted through an external circuit to the inner wall of the first chamber 1 cylinder, through partition 33 to the inner wall of the second outer chamber 3 cylinder. The electron acceptor accepts electrons to form a closed loop. At the same time, heavy metal ions are reduced and attached to the inner wall, and the inner wall is cleaned regularly.

[0049] The regeneration inlet valve b6 and outlet valve b32 of the first chamber 1 are closed; during operation, the inlet valve a5 and outlet valve a31 are open, and the pretreated desulfurization wastewater flows into the first chamber 1 through the inlet I via the inlet pipe a9 connected to the booster pump a7. At this time, a negative charge is induced at the titanium rod 11, and the cations in the desulfurization wastewater are adsorbed on the active material of the titanium rod 11; a positive charge is induced at the inner wall titanium cylinder, and the anions in the wastewater migrate in a directional manner and are adsorbed on the active material of the inner wall titanium cylinder; the purified water is discharged through the outlet pipe a15 controlled by the outlet valve a31. During operation, the self-driven circuit auxiliary power supply 28 and switch 26 are automatically closed, and the water quality and quantity of domestic sewage are automatically monitored, adjusted and replenished.

[0050] The regeneration process is as follows: disconnect the backup power supply 27 and the self-driven circuit switch 26; close the inlet valve c19 and the outlet valve c23 to prevent domestic sewage from entering the second inner chamber 2; close the inlet valve d18 and the outlet valve d24 to prevent heavy metal wastewater (or potassium ferricyanide solution) from entering the second outer chamber 3. At this time, the electric field in the first chamber 1 disappears and there is no induced charge; the valves of the inlet valve b6 and the outlet valve b32 in the regeneration process of the first chamber 1 are opened; the valves of the inlet valve a5 and the outlet valve a31 in operation are closed, and the pretreated desulfurization wastewater enters the first chamber 1 through the inlet pipe b10 connected to the booster pump b8. The anions and cations attached to the electroactive material are desorbed and discharged from the outlet pipe b16 controlled by the outlet valve b32 along with the regeneration salt to form a regeneration concentrated solution.

[0051] Alternative operating procedure: Turn on the backup power supply 27, turn off the auxiliary power switch 26 of the self-driven circuit, and close the inlet valve c19 and outlet valve c23 to prevent domestic sewage from entering the second inner chamber 2; close the inlet valve d18 and outlet valve d24 to prevent heavy metal wastewater (or potassium ferricyanide solution) from entering the second outer chamber 3; open the inlet valve a5 and outlet valve a31 connected to the first chamber 1, and close the regeneration inlet valve b6 and outlet valve b32. This is the alternative solution when there is no domestic sewage to be treated, which is the traditional electro-adsorption process.

[0052] Alternative process (reverse regeneration): Reverse turn on the backup power supply 27 and turn off the auxiliary power switch 26 of the self-driven circuit; close the inlet valve c19 and the outlet valve c23 to prevent domestic sewage from entering the second inner chamber 2; close the inlet valve d18 and the outlet valve d24 to prevent heavy metal wastewater (or potassium ferricyanide solution) from entering the second outer chamber 3, and close the working inlet valve a5 and outlet valve a31 of the first chamber 1; during the regeneration process, the inlet valve b6 and the outlet valve b32 are opened. This is the traditional electroadsorption regeneration process, an alternative scheme that requires periodic full regeneration after the electroactive material has been running for several weeks.

[0053] Microbial degradation generates electrons that are directly transferred to the two electrodes in the desalination chamber, enabling the directional migration of anions and cations.

[0054] If the inlet water in the inlet pipe d22 of the second outer chamber 3 is heavy metal ion wastewater, then the heavy metals can be effectively recovered and separated after being reduced on the inner wall of the second outer chamber 3. If there is no heavy metal wastewater that needs to be treated, then the inlet water of the second outer chamber 3 can be replaced with potassium ferricyanide solution (concentration of 0.39 g / L) and buffer solution (a mixed solution of disodium hydrogen phosphate dodecahydrate and sodium dihydrogen phosphate dihydrate with a concentration of 20.64 g / L and 6.64 g / L).

[0055] This invention relates to a self-electrically driven desulfurization wastewater simultaneous desalination device. Through the degradation of organic matter in the second inner chamber, electrons and protons are generated. Electrons are transported via titanium rods and external circuitry to the inner wall of the first chamber cylinder, and then to the second outer chamber, where electron acceptors accept electrons and are reduced. Pretreated desulfurization wastewater enters the first chamber, where cations are directionally adsorbed onto the titanium rod active material, and anions are directionally adsorbed onto the inner wall titanium cylinder active material before effluent. Regeneration of the adsorbent material is achieved by closing the inlet and outlet valves of the second and inner chambers. Anions, cations, and charged particles in the water are removed without the addition of external reagents. This process is physical and produces no other chemical byproducts. Compared to membrane and thermal methods, this process has lower energy consumption. The separation of cations and anions via different pathways makes it less prone to structural defects and avoids the drawbacks of membrane clogging and complex maintenance, resulting in lower operating costs and reduced requirements for the pretreatment process.

[0056] This invention relates to a self-electrically driven desulfurization wastewater simultaneous desalination device. It achieves self-driven directional electro-adsorption of anions and cations without the need for external voltage, while simultaneously degrading other wastewater pollutants in the plant area. This avoids the modification and screening processes required in high-salt environments of microbial desalination systems. Electrons generated from the degradation of organic matter in domestic sewage are directly transferred to the adsorption electrodes for self-electro-adsorption of anions and cations in high-salt wastewater. The treatment path is adjusted according to changes in water quality and quantity. When there is no domestic wastewater to be treated, a backup power supply is activated, switching to a traditional electro-adsorption device. Closing the inlet and outlet valves of the second chamber allows for direct regeneration of the active material, enabling continuous operation. An auxiliary and backup power supply is provided, allowing for immediate switching to a traditional electro-adsorption device. This ensures the normal operation of the desulfurization wastewater desalination process even when the quality and quantity of domestic sewage do not meet requirements. It achieves simultaneous, integrated, self-driven treatment of desulfurization wastewater, domestic sewage, and heavy metal wastewater, significantly reducing the footprint and treatment costs of wastewater treatment equipment.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A device for simultaneous desalination of desulfurization wastewater driven by electric power, characterized in that, It includes a cylindrical cavity, which is divided into upper and lower cavities. The upper cavity contains a first chamber (1), which is used for the electro-adsorption of anions and cations in desulfurization wastewater and the regeneration of the membrane. The lower cavity contains a second inner chamber (2), which is used for microbial degradation of organic matter, realizing the degradation of organic matter in biological wastewater, and generating electrons and protons at the same time. The second inner chamber (2) is surrounded by a second outer chamber (3), which is used for electron acceptors to accept electrons and be reduced. A proton membrane (29) is set at the lower end of the second inner chamber (2), which leads to the second outer chamber (3) to avoid excessive accumulation of protons.

2. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 1, characterized in that, A partition (33) is provided between the upper and lower cavities. The first chamber (1) and the second inner chamber (2) are separated by the partition (33). A titanium rod (11) is suspended on the central axis of the first chamber (1). The titanium rod (11) passes through the partition (33) and extends into the interior of the second inner chamber (2). Electrons generated after the decomposition of organic matter in the second inner chamber (2) are directly transmitted to the first chamber (1) through the titanium rod (11). A graphite brush (12) is provided at one end of the titanium rod (11) that enters the second inner chamber (2). The graphite brush (12) has achieved the directional domestication of electrogenic bacteria.

3. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 2, characterized in that, The first chamber (1) and the second outer chamber (3) share the same inner wall, both made of titanium metal, to enable the effective transmission of electrons generated in the second inner chamber (2) to the external circuit; electrons from the inner wall of the first chamber (1) are transmitted to the inner wall of the second outer chamber (3), and the electron acceptor in the second outer chamber (3) is reduced; the inner wall of the first chamber (1) and the outer wall of the titanium rod (11) located in the first chamber (1) carry opposite charges, forming a double-layer capacitor.

4. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 2, characterized in that, The titanium rod (11) is inserted into the partition (33) and fitted with a sealing ring (13).

5. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 2, characterized in that, The inner wall of the first chamber (1) and the outer wall of the titanium rod (11) located in the first chamber (1) are both coated with activated carbon powder (14).

6. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 2, characterized in that, The inner wall of the first chamber (1) is connected to the titanium rod (11) by a wire. A self-driven circuit switch (26) is installed on the wire. The wire is connected to the self-driven circuit auxiliary power supply (28). The self-driven circuit auxiliary power supply (28) is used to adjust the load. An automatic monitoring device is installed on the self-driven circuit. The inner wall of the first chamber (1) is connected to the titanium rod (11) by a wire and a backup power supply (27). The backup power supply (27) is in an open circuit state when it is running.

7. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 1, characterized in that, Two water inlets I are provided on one side of the first chamber (1). The two water inlets I are respectively connected to water inlet pipe a (9) and water inlet pipe b (10). Water inlet pipe a (9) is connected to lift pump a (7). Water inlet valve a (5) is provided on water inlet pipe a (9). Water inlet pipe b (10) is connected to lift pump b (8). Water inlet valve b (6) is provided on water inlet pipe b (10). The ends of water inlet pipe a (9) and water inlet pipe b (10) are connected together to form a... The road is connected to the desulfurization wastewater pipe (4); two outlets I are set on the other side of the first chamber (1), and the two outlets I are connected to outlet pipe a (15) and outlet pipe b (16) respectively. An outlet valve a (31) is set on the outlet pipe a (15), and desalination is achieved by controlling the water outlet through the outlet valve a (31). An outlet valve b (32) is set on the outlet pipe a (16), and the electroactive material is regenerated by the water outlet through the outlet valve b (32).

8. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 1, characterized in that, An inlet II is opened on one side of the second inner chamber (2), and the inlet II is connected to the inlet pipe c (21). An inlet valve c (19) is installed on the inlet pipe c (21). The inlet pipe c (21) extends through the outside of the second outer chamber (3) and is connected to the domestic sewage pipe (20). An outlet II is opened on the other side of the second inner chamber (2), and the outlet II is connected to the outlet pipe c (30). An outlet valve c (23) is installed on the outlet pipe c (30). Domestic sewage enters the second inner chamber (2) through the inlet valve c (19) and the inlet pipe c (21) and exits through the outlet pipe c (30) to achieve degradation.

9. The device for simultaneous desalination of self-electrically driven desulfurization wastewater according to claim 8, characterized in that, A water inlet Ⅲ is provided on one side of the second outer chamber (3). The water inlet Ⅲ is located below the water inlet Ⅱ. The water inlet Ⅲ is connected to the water inlet pipe d (22). A water inlet valve d (18) is provided on the water inlet pipe d (22). The water inlet pipe d (22) is connected to the water inlet pipeline (17). Heavy metal wastewater or potassium ferricyanide solution flows in the water inlet pipeline (17). An outlet Ⅲ is opened on the other side of the second outer chamber (3). The water outlet Ⅲ is located above the water inlet Ⅱ. The water outlet Ⅲ is connected to the water outlet pipe d (25). A water outlet valve d (24) is provided on the water outlet pipe d (25). The liquid in the second outer chamber 3 is discharged through the water outlet pipe d (25).

10. The method of using a self-electrically driven desulfurization wastewater simultaneous desalination device, characterized in that, The specific steps are as follows: Normal operation is as follows: disconnect the backup power supply (27) and the self-driven circuit switch (26); open the inlet valve c (19) and the outlet valve c (23) to control the domestic sewage to enter the second inner chamber (2); open the inlet valve d (18) and the outlet valve d (24) to control the metal wastewater or potassium ferricyanide solution in the inlet pipeline (17) to enter the second outer chamber (3); the organic matter in the domestic sewage in the second inner chamber (2) is degraded by electrogenic bacteria attached to the graphite brush (12) to generate electrons and protons; the electrons pass through the titanium rod (11) in the second inner chamber (2), through the partition (33), and are transmitted to the titanium rod (11) in the first chamber (1); Electrons reach the inner wall of the first chamber (1) through the external circuit, pass through the partition (33) and are transmitted to the inner wall of the second outer chamber (3). The electron acceptor accepts electrons and forms a closed loop. At the same time, heavy metal ions are reduced and attached to the inner wall, and the inner wall is cleaned regularly. The inlet valve b (6) and outlet valve b (32) of the first chamber (1) are closed; the inlet valve a (5) and outlet valve a (31) are opened, and the pretreated desulfurization wastewater flows into the first chamber (1) through the inlet pipe a (9) via the desulfurization wastewater pipe (4). At this time, a negative charge is induced at the titanium rod (11), and the cations in the desulfurization wastewater are adsorbed on the active material of the titanium rod (11); a positive charge is induced at the inner wall titanium cylinder, and the anions in the wastewater migrate in a directional manner and are adsorbed on the active material of the inner wall titanium cylinder; the purified water is drained through the outlet pipe a (15) controlled by the outlet valve a (31). During the operation, the self-driven circuit auxiliary power supply (28) is automatically monitored, adjusted and replenished according to the water quality and quantity of domestic sewage. The regeneration process is as follows: disconnect the backup power supply (27) and the self-driven circuit switch (26); close the inlet valve c (19) and the outlet valve c (23) to prevent domestic sewage from entering the second inner chamber (2); close the inlet valve d (18) and the outlet valve d (24) to prevent desulfurization wastewater from entering the second outer chamber (3). At this time, the electric field in the first chamber (1) disappears and there is no induced charge; the valves of the inlet valve b (6) and the outlet valve b (32) of the first chamber (1) are opened; the valves of the inlet valve a (5) and the outlet valve a (31) are closed. The pretreated desulfurization wastewater enters the first chamber (1) through the inlet pipe b (10) connected to the booster pump b (8). The anions and cations attached to the electroactive material are desorbed and drained from the outlet pipe a (16) controlled by the outlet valve b (32) along with the regenerated salt to form a regenerated concentrated solution. Alternative working process: turn on the backup power supply (27), turn off the self-driven circuit switch (26), close the inlet valve c (19) and outlet valve c (23) to prevent domestic sewage from entering the second inner chamber (2); close the inlet valve d (18) and outlet valve d (24) to prevent metal wastewater or potassium ferricyanide solution from entering the second outer chamber (3), open the valves of the inlet valve a (5) and outlet valve a (31) connected to the first chamber (1), and close the valves of the inlet valve b (6) and outlet valve b (32). At this time, it is the traditional electro-adsorption process, which is an alternative when there is no domestic sewage to be treated. Reverse regeneration alternative process: Reverse turn on the backup power supply (27), turn off the self-drive circuit switch (26); close the inlet valve c (19) and outlet valve c (23) to prevent domestic sewage from entering the second inner chamber (2); close the inlet valve d (18) and outlet valve d (24) to prevent metal wastewater or potassium ferricyanide solution wastewater from entering the second outer chamber (3), and close the inlet valve a (5) and outlet valve a (31) of the first chamber (1); open the inlet valve b (6) and outlet valve b (32). At this time, it is the traditional electro-adsorption regeneration process, which is an alternative scheme that requires regular full regeneration after the electroactive material has been running for several weeks.

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