Electrochemical hardness removal and sterilization treatment system utilizing flue gas CO2 in cooperation with wastewater
By introducing CO2 flue gas into the electrochemical treatment system to create a weakly acidic environment, the problems of cumbersome operation and high cost caused by acid treatment in the existing technology are solved. This achieves efficient hardening and sterilization, reduces operating costs, and recycles CO2.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BAOTOU DONGHUA THERMAL POWER CO LTD
- Filing Date
- 2026-03-24
- Publication Date
- 2026-05-01
AI Technical Summary
Existing electrochemical treatment systems require acid treatment, which leads to cumbersome operation, high cost, and increased salt content in wastewater, which is not conducive to wastewater treatment and reuse.
The flue gas CO2 co-processing wastewater electrochemical hardening and sterilization system introduces CO2 into the electrochemical treatment device through a CO2 flue gas pipe. It reacts with the wastewater to form a weakly acidic environment, generating HCO3- ions that react with hardness ions to form precipitates. This maintains the weakly acidic environment within the electrochemical treatment device, enhancing the sterilization effect without the need for additional acid.
It achieves efficient removal of hardness ions and sterilization in a weakly acidic environment, reduces operating costs, improves processing efficiency, and enables the capture and recycling of CO2.
Smart Images
Figure CN121948624A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrochemical wastewater treatment technology, and in particular to a wastewater electrochemical hardening and sterilization treatment system that utilizes flue gas CO2 in conjunction with wastewater. Background Technology
[0002] Currently, while existing electrochemical wastewater treatment systems can achieve good hardness removal and sterilization effects, the sterilization effect of bactericides such as hypochlorite generated by electrochemistry is closely related to the pH of the water. They only have a better sterilization effect under acidic conditions. Therefore, existing electrochemical treatment systems require acid treatment during operation. This not only makes the system operation cumbersome and costly, but also leads to an increase in the salinity of the wastewater, which is not conducive to wastewater treatment and reuse. Summary of the Invention
[0003] The purpose of this application is to provide a wastewater electrochemical hardening and sterilization treatment system that utilizes flue gas CO2 in conjunction with the system, in order to solve the technical problem that existing electrochemical treatment systems require acid treatment during operation, which not only leads to cumbersome operation and high cost, but also increases the salinity of wastewater, which is not conducive to wastewater treatment and reuse.
[0004] This application provides a wastewater electrochemical sterilization and disinfection system utilizing flue gas CO2 in conjunction with wastewater treatment, comprising: An electrochemical treatment device includes a cathode and an anode disposed therein, and a control panel disposed thereout, wherein the cathode and the anode are externally connected to a DC power supply and electrically connected to the control panel; and A wastewater inlet pipe, one end of which is connected to the interior of the electrochemical treatment device, is used to deliver wastewater into the interior of the electrochemical treatment device; and The CO2 flue gas pipe includes a first outer pipe section located outside the electrochemical treatment device and a second inner pipe section extending into the electrochemical treatment device and immersed in the wastewater. The second inner pipe section has a plurality of aeration holes along its extension direction to blow CO2-containing flue gas into the wastewater inside the electrochemical treatment device.
[0005] Furthermore, the first outer pipe section of the CO2 flue gas pipe is located on one side outside the electrochemical treatment device, and the second inner pipe section extends into the bottom of the electrochemical treatment device and extends from the side into which it extends to the opposite side. Furthermore, the second inner pipe section is provided with a plurality of aeration holes at even intervals, and the diameter of each aeration hole is between 2 and 5 mm.
[0006] Furthermore, the pH value of the wastewater inside the electrochemical treatment device is maintained between 6.2 and 6.8 by the control panel.
[0007] Furthermore, the electrochemical treatment device is equipped with a pH meter, which is used to monitor the pH value of the wastewater by immersing it in the wastewater. The pH meter is electrically connected to the control panel to provide feedback on the pH value of the wastewater.
[0008] Furthermore, a first valve and a first flow meter are provided on the inlet end of the wastewater inlet pipe to control and monitor the inflow rate of wastewater. The first outer pipe section of the CO2 flue gas pipe is equipped with a first fan, a second valve, a second flow meter and a pressure gauge, which are used to provide conveying power, control and monitor the flue gas inflow and monitor the flue gas pressure, respectively. The first valve, the first flow meter, the second valve, the second flow meter, and the pressure gauge are all electrically connected to the control panel to jointly control the amount of CO2 flue gas entering and the amount of wastewater entering, and to maintain the pH value of the wastewater between 6.2 and 6.8.
[0009] Furthermore, the cathode and the anode are made of materials that combine high conductivity and high hydrophobicity, including any one of graphene or graphite carbon nanotube materials, metal-based materials with surface modified by hydrophobic organic materials, and conductive polymer composite materials.
[0010] Furthermore, the electrochemical treatment device is also equipped with an ultrasonic descaling device. The ultrasonic descaling device adopts a multi-band structure, with the frequency adjustable between 20kHz and 400kHz.
[0011] Furthermore, the lower part of the electrochemical treatment device is provided with a conical sedimentation tank that is wider at the top and narrower at the bottom, and a slag discharge tank that is connected to the bottom outlet of the conical sedimentation tank through a connecting pipe. A fourth valve is provided on the connecting pipe, and the fourth valve is opened periodically to discharge slag.
[0012] Furthermore, the conical sedimentation tank is equipped with an inclined tube clarifier, which is connected to the electrochemical treatment device. The inclined tube clarifier has multiple inclined tubes, which are spaced apart from each other and arranged in parallel, with an inclination angle between 30° and 80°.
[0013] Furthermore, the flue gas CO2 co-processing wastewater electrochemical hardening and sterilization treatment system also includes an exhaust pipe and an outlet pipe installed on one side of the electrochemical treatment device. One end of the exhaust pipe is connected to the top of the electrochemical treatment device near one end. A second fan is installed on the exhaust pipe to discharge the flue gas after the reaction outside the electrochemical treatment device. The outlet pipe is equipped with a third valve to discharge the electrochemically treated water outside the electrochemical treatment device.
[0014] Compared with existing technologies, the CO2 flue gas co-processing wastewater electrochemical hardness removal and sterilization system provided in this application introduces wastewater into the electrochemical treatment device through a wastewater inlet pipe and introduces CO2-containing flue gas into the electrochemical treatment device through a CO2 flue gas pipe. Specifically, the CO2-containing flue gas is evenly sprayed out of the wastewater in the electrochemical treatment device through each aeration hole, directly contacting and reacting with the wastewater. While providing a weakly acidic environment, it enhances the precipitation and removal of hardness ions in the wastewater. The voltage and current parameters of the cathode and anode in the electrochemical treatment device can be controlled through the control panel.
[0015] This setup, on the one hand, utilizes the HCO3- formed by the dissolution of CO2 in the flue gas into water. 3- Ions can react with Ca in wastewater 2+ Ions, Mg 2+ The ionic reaction generates CaCO3 and MgCO3 precipitates, thereby reducing water hardness and improving the hardness removal and precipitation removal performance of the electrochemical treatment device. Furthermore, it can quickly and efficiently replenish CO3 in the wastewater. 2- To increase the Ca content in wastewater 2+ Mg 2+ On the one hand, it achieves precipitation removal effect; on the other hand, by utilizing the weakly acidic environment formed by CO2 dissolving in water in flue gas, the water quality in the electrochemical treatment device is maintained in a weakly acidic environment, resulting in the generation of high concentrations of HClO in the water, which effectively enhances the bactericidal effect of hypochlorite ions, and at the same time, there is no need to add acid to the device, reducing this acid addition step, improving overall operating efficiency and reducing overall operating costs; furthermore, it also achieves the effects of capturing, removing and recycling CO2 in flue gas, and has good potential for flue gas application. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of the wastewater electrochemical hardening and sterilization treatment system that utilizes flue gas CO2 in conjunction with the embodiments of this application.
[0018] Figure label: 10-Electrochemical treatment device; 11-Cathode; 12-Anode; 13-pH meter; 14-Ultrasonic descaling device; 20 - Wastewater inlet pipe; 21-First valve; 22-First Flow Meter; 30-CO2 flue gas pipe; 31-First outer pipe section; 311 - Second valve; 312 - Second Flow Meter; 313 - First Wind Turbine; 314 - Pressure gauge; 32 - Second inner pipe section; 321 - Aeration hole; 40 - Exhaust pipe; 41-Second fan; 50 - Water outlet pipe; 51-Third valve; 61- Conical sedimentation tank; 611-Inclined tube clarifier; 62-Connecting pipe; 621 - Fourth valve; 70 - Slag Discharge Tank. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0025] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0026] like Figure 1 As shown in the embodiment of this application, a wastewater hardness removal and sterilization treatment system using flue gas CO2 in synergy is provided. It can be applied to circulating water treatment in industries such as thermal power, metallurgy, chemical industry, and cement, and can also be applied to the softening and sterilization treatment of high-hardness wastewater.
[0027] like Figure 1 As shown, the wastewater electrochemical hardening and sterilization treatment system utilizing flue gas CO2 includes at least an electrochemical treatment device 10, a wastewater inlet pipe 20, and a CO2 flue gas pipe 30. The electrochemical treatment device 10 includes a cathode 11 and an anode 12 disposed inside it, and a control panel disposed outside it. The cathode 11 and anode 12 are connected to an external DC power supply and are electrically connected to the control panel. The control panel is used to adjust the operating voltage and / or operating current parameters of the electrochemical treatment device 10.
[0028] One end of the wastewater inlet pipe 20 is connected to the interior of the electrochemical treatment device 10, and is used to send wastewater into the interior of the electrochemical treatment device 10.
[0029] The CO2 flue gas pipe 30 includes a first outer pipe section 31 located outside the electrochemical treatment device 10 and a second inner pipe section 32 extending into the interior of the electrochemical treatment device 10 and immersed in the wastewater. The second inner pipe section 32 is provided with a plurality of aeration holes 321 along its extension direction to blow CO2-containing flue gas into the wastewater inside the electrochemical treatment device 10.
[0030] Preferably, the aeration holes 321 are evenly spaced along the extension direction of the second inner pipe section 32, and the diameter of each aeration hole 321 is between 2 and 5 mm. Preferably, the first outer pipe section 31 is located on one side outside the electrochemical treatment device 10, and the second inner pipe section 32 extends into the bottom of the electrochemical treatment device 10, extending from the side it extends into to the opposite side, spanning the entire bottom of the electrochemical treatment device 10. This improves the uniform dispersion of CO2 in the wastewater, optimizes the water flow distribution of the electrochemical treatment device 10, and increases the reaction efficiency of the electrochemical treatment device 10.
[0031] Compared with the prior art, the CO2 flue gas co-processing wastewater electrochemical hardness removal and sterilization system provided in this application introduces wastewater into the electrochemical treatment device 10 through the wastewater inlet pipe 20, and introduces CO2-containing flue gas into the electrochemical treatment device 10 through the CO2 flue gas pipe 30. Specifically, the CO2-containing flue gas is evenly sprayed out of the wastewater in the electrochemical treatment device 10 through each aeration hole 321, directly contacting and reacting with the wastewater. While providing a weakly acidic environment, it enhances the precipitation and removal of hardness ions in the wastewater. The voltage and current parameters of the cathode 11 and anode 12 in the electrochemical treatment device 10 can be controlled through the control panel.
[0032] This setup, on the one hand, utilizes the HCO3- formed by the dissolution of CO2 in the flue gas into water. 3- Ions can react with Ca in wastewater 2+ Ions, Mg 2+ The ionic reaction generates CaCO3 and MgCO3 precipitates, as detailed in reaction formulas (1)-(3) below, thereby reducing water hardness, improving the hardness removal and precipitation removal performance of the electrochemical treatment device 10, and rapidly and efficiently replenishing CO3 in the wastewater. 2- To increase the Ca content in wastewater 2+ Mg 2+On the one hand, the precipitation removal effect is achieved; on the other hand, the weakly acidic environment formed by CO2 in flue gas dissolving in water is used to maintain the water quality in the electrochemical treatment device 10 in a weakly acidic environment, so that a high concentration of HClO is generated in the water, as shown in the reaction formulas (4)-(5) below, which effectively enhances the bactericidal effect of hypochlorite, and at the same time, there is no need to add acid to the device, reducing this acid addition step, improving the overall operating efficiency and reducing the overall operating cost; on the other hand, it also achieves the effect of capturing, removing and recycling CO2 in flue gas, and has good flue gas application potential.
[0033] Relevant reaction formula: HCO 3 +OH →CO3 2 + H2O (1) Mg 2+ +CO3 2 →MgCO3↓(2) Ca 2+ +CO3 2 →CaCO3↓(3) 2Cl - -2e - = Cl2(4) Cl2+OH = HClO + Cl - (5) Preferably, the pH value of the wastewater inside the electrochemical treatment device 10 can be controlled to maintain a weakly acidic environment between 6.2 and 6.8, so that the ClO generated at the anode of the electrochemical treatment device 10 can be kept in a healthy state. - With H + Formation of HClO, increasing ClO - The sterilization and disinfection effect is achieved. Specifically, the electrolysis intensity can be adjusted by controlling the current and voltage parameters of the cathode 11 and anode 12 via the control panel, thereby changing the OH- produced by the electrolysis of water. - Ion quantity is used to adjust the pH level in wastewater.
[0034] Furthermore, such as Figure 1As shown, the electrochemical treatment device 10 can also be equipped with a pH meter 13, which is immersed in the wastewater to monitor the pH value. The pH meter 13 is electrically connected to the control panel to provide real-time feedback of the wastewater pH value. Then, the control panel can automatically adjust the current and voltage intensity of the cathode 11 and anode 12 based on the real-time pH value feedback from the pH meter 13, thereby adjusting the electrolysis intensity and automatically regulating the pH range of the wastewater to maintain a slightly acidic environment between pH 6.2 and 6.8, ensuring the optimal pH level for ClO₂ production. - Highly effective sterilization and disinfection.
[0035] like Figure 1 As shown, optionally, a first valve 21 and a first flow meter 22 may be provided on the inlet end of the wastewater inlet pipe 20. The first valve 21 is used to open or close the wastewater inlet and control the wastewater inlet flow rate, and the first flow meter 22 is used to monitor the wastewater inlet flow rate.
[0036] Optionally, the first outer pipe section 31 of the CO2 flue gas pipe 30 may be equipped with a first fan 313, a second valve 311, a second flow meter 312, and a pressure gauge 314. The first fan 313 is used to provide conveying power. The flue gas containing CO2 is sent to the lower part of the electrochemical treatment device 10 through the CO2 flue gas pipe 30 under the pressurization of the first fan 313. The second valve 311 is used to open or close the flue gas and control the flue gas inflow. The second flow meter 312 is used to monitor the flue gas inflow. The pressure gauge 314 is used to monitor the flue gas pressure.
[0037] Furthermore, the first flow meter 22 and the second flow meter 312 can be electrically connected to the control panel to provide feedback on the inflow of wastewater and CO2 flue gas. The first valve 21 and the second valve 311 can also be electrically connected to the control panel, enabling the control panel to automatically control the start and opening of the first valve 21 and the second valve 311, thereby controlling the inflow of wastewater and CO2 flue gas. Furthermore, by adjusting the current and voltage intensity of the cathode 11 and anode 12 and regulating the electrolysis intensity, the inflow of CO2 flue gas and wastewater can be controlled in a coordinated manner, further precisely and efficiently maintaining the pH value in the wastewater between 6.2 and 6.8, improving the intelligence and precision of the linkage.
[0038] In one optional embodiment, the cathode 11 and anode 12 in the electrochemical treatment device 10 are made of materials that combine high conductivity and high hydrophobicity, including but not limited to graphene or graphite carbon nanotube materials and their derivatives, surface-modified metal-based materials (such as silver or copper nanomaterials with surface-modified hydrophobic organic materials), and conductive polymer composite materials (such as any one of polypyrrole, polyaniline, etc., which have good electrochemical activity and the ability to remove scale such as CaCO3, MgCO3, and Mg(OH)2).
[0039] like Figure 1 As shown, another optional embodiment includes an ultrasonic descaling device 14 inside the electrochemical treatment device 10. This ultrasonic descaling device 14 is immersed in the wastewater inside the electrochemical treatment device 10 and emits ultrasonic waves to promptly remove scale from the cathode 11 and anode 12, ensuring stable operation of the electrochemical treatment device 10. Furthermore, the ultrasonic descaling device 14 adopts a multi-band structure, and its frequency can be adjusted between 20kHz and 400kHz according to the scaling conditions of the electrodes and the flow-through components of the electrochemical treatment device 10. It can be adjusted for continuous or intermittent operation, and its output power can be adjusted and optimized according to the treated water volume and the scaling conditions of the equipment.
[0040] Another alternative embodiment is, as follows: Figure 1 As shown, the lower part of the electrochemical treatment device 10 may be sequentially provided with a conical sedimentation tank 61 and a sludge discharge tank 70 connected to the bottom outlet of the conical sedimentation tank 61 via a connecting pipe 62. The conical sedimentation tank 61 has a conical structure that is wider at the top and narrower at the bottom. An inclined tube clarifier 611 may be installed inside the conical sedimentation tank 61 and connected to the bottom of the electrochemical treatment device 10. The inclined tube clarifier 611 has multiple inclined tubes, which are spaced apart and arranged in parallel. The number of inclined tubes and the inclination angle of the inclined tube clarifier 611 can be adjusted according to the amount of water to be treated and the amount of scale produced. Preferably, the inclination angle is between 30° and 80°. The precipitate generated during the operation of the electrochemical treatment device 10 falls on the inclined tubes of the inclined tube clarifier 611, accelerating the sedimentation of the precipitate to form sludge, which is then discharged into the sludge discharge tank 70 through the sludge discharge port at the bottom. A fourth valve 621 is provided on the connecting pipe 62, which can be opened periodically to achieve periodic sludge discharge.
[0041] Preferred, such as Figure 1As shown in the embodiment of this application, the flue gas CO2 co-processing wastewater electrochemical hardening and sterilization treatment system may further include an exhaust pipe 40 and a water outlet pipe 50 disposed on one side of the electrochemical treatment device 10. One end of the exhaust pipe 40 may be connected to a position on the top side of the electrochemical treatment device 10, and a second fan 41 is provided on the exhaust pipe 40 to discharge the reacted flue gas outside the electrochemical treatment device 10; a third valve 51 is provided on the water outlet pipe 50 to discharge the electrochemically treated water outside the electrochemical treatment device 10.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A system for treating wastewater using flue gas CO2 in conjunction with electrochemical sterilization and disinfection, characterized in that, include: An electrochemical treatment device includes a cathode and an anode disposed therein, and a control panel disposed thereout, wherein the cathode and the anode are externally connected to a DC power supply and electrically connected to the control panel; and A wastewater inlet pipe, one end of which is connected to the interior of the electrochemical treatment device, is used to deliver wastewater into the interior of the electrochemical treatment device; and The CO2 flue gas pipe includes a first outer pipe section located outside the electrochemical treatment device and a second inner pipe section extending into the electrochemical treatment device and immersed in the wastewater. The second inner pipe section has a plurality of aeration holes along its extension direction to blow CO2-containing flue gas into the wastewater inside the electrochemical treatment device.
2. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 1, characterized in that, The first outer pipe section of the CO2 flue gas pipe is located on one side outside the electrochemical treatment device, and the second inner pipe section extends into the bottom of the electrochemical treatment device and extends from the side into which it extends to the opposite side. Furthermore, the second inner pipe section is provided with a plurality of aeration holes at even intervals, and the diameter of each aeration hole is between 2 and 5 mm.
3. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 2, characterized in that, The pH value of the wastewater inside the electrochemical treatment device is maintained between 6.2 and 6.8 by controlling the control panel.
4. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 3, characterized in that, The electrochemical treatment device is also equipped with a pH meter, which is used to monitor the pH value of the wastewater by immersing it in the wastewater. The pH meter is electrically connected to the control panel to provide feedback on the pH value of the wastewater.
5. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 4, characterized in that, The wastewater inlet pipe is equipped with a first valve and a first flow meter at the inlet end to control and monitor the inflow rate of wastewater. The first outer pipe section of the CO2 flue gas pipe is equipped with a first fan, a second valve, a second flow meter and a pressure gauge, which are used to provide conveying power, control and monitor the flue gas inflow and monitor the flue gas pressure, respectively. The first valve, the first flow meter, the second valve, the second flow meter, and the pressure gauge are all electrically connected to the control panel to jointly control the amount of CO2 flue gas entering and the amount of wastewater entering, and to maintain the pH value of the wastewater between 6.2 and 6.
8.
6. The flue gas CO2 co-processing wastewater electrochemical sterilization and disinfection system according to any one of claims 1 to 5, characterized in that, The cathode and the anode are made of materials that combine high conductivity and high hydrophobicity, including any one of graphene or graphite carbon nanotube materials, metal-based materials whose surfaces are modified with hydrophobic organic materials, and conductive polymer composite materials.
7. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 1, characterized in that, The electrochemical treatment device is also equipped with an ultrasonic descaling device. The ultrasonic descaling device adopts a multi-band structure, with the frequency adjustable between 20kHz and 400kHz.
8. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 1, characterized in that, The lower part of the electrochemical treatment device is provided with a conical sedimentation tank that is wider at the top and narrower at the bottom, and a slag discharge tank that is connected to the bottom outlet of the conical sedimentation tank through a connecting pipe. A fourth valve is provided on the connecting pipe, and the fourth valve is opened periodically to discharge slag.
9. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 8, characterized in that, The conical sedimentation tank is equipped with an inclined tube clarifier, which is connected to the electrochemical treatment device. The inclined tube clarifier has multiple inclined tubes, which are spaced apart from each other and arranged in parallel, with an inclination angle between 30° and 80°.
10. The flue gas CO2 synergistic wastewater electrochemical sterilization and disinfection system according to claim 1, characterized in that, It also includes an exhaust pipe and a water outlet pipe located on one side of the electrochemical treatment device; One end of the exhaust pipe is connected to the top of the electrochemical treatment device near one end. A second fan is installed on the exhaust pipe to discharge the flue gas after the reaction outside the electrochemical treatment device. The outlet pipe is equipped with a third valve to discharge the electrochemically treated water outside the electrochemical treatment device.