Novel electrochemical treatment system for copper ions in sewage

Abstract

The utility model discloses a novel electrochemical treatment system for copper ions in sewage, and belongs to the field of energy conservation and environmental protection. The system comprises a controller, an equipotential instrument and a reaction tank, reaction main body equipment is fixed on a load platform in the reaction tank, two sides of the reaction tank are respectively provided with a water outlet and a water inlet, and the water inlet and the water outlet are respectively provided with an electromagnetic valve and a flow meter; wherein the reaction main body equipment comprises a cathode conducting ring and an anode conducting ring. The cathode, the anode and the reference electrode are respectively connected to an equipotential instrument, and then a controller is connected with an electromagnetic valve and a flow meter to realize parameter regulation and control. The electrostatic field effect is applied to the sewage, copper ions in the water are adsorbed on the surface of the cathode and are concentrated and enriched, and the effect of removing the ions in the water solution is achieved. Compared with a physical method, a chemical method and other methods, the electrochemical adsorption method has the advantages of high adsorption and capture efficiency, strong operability of the device, high stability and strong renewability, and has a great application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemistry, in particular to a novel electrochemical treatment system for copper ions in sewage. Background Art

[0002] Copper is a transition metal element that plays an important role in the electronics and electrical industry, construction industry, machinery manufacturing, chemical industry and defense industry. In nature, copper ions exist in soil, water and organisms. Copper ions are positively charged particles formed by copper atoms losing electrons, and are usually more common in the form of divalent copper ions. When the concentration of copper ions in water is too high, it will have toxic effects on aquatic organisms. For example, it will inhibit the photosynthesis and growth and reproduction of algae, affect the survival and development of zooplankton, and damage the respiratory system, nervous system and reproductive system of aquatic animals such as fish, resulting in a decrease in the population of aquatic organisms and destroying the balance of aquatic ecosystems. For the human body, long-term exposure to low concentrations of copper ions may cause chronic poisoning, manifested as damage to the liver and kidneys. In addition, it may also affect the nervous system and the blood system. At present, the commonly used methods are chemical precipitation, ion exchange and adsorption. However, these processes have some defects, such as harsh reaction conditions, environmental hazards of by-products, high investment costs, slow reaction rates, and difficulty in recycling. In recent years, electrochemical treatment technology has received widespread attention as a new process for removing ions from wastewater. Under the action of the electric field, this process causes metal ions in the solution to move toward the cathode and anions to move toward the anode, thereby achieving directional migration of ions. When metal ions migrate to the cathode surface and obtain electrons at the cathode, they will be deposited on the cathode in the form of metal elements. As the reaction proceeds, metal ions are continuously deposited at the cathode, thereby reducing the concentration of metal ions in the solution and achieving the removal of metal ions. In electrochemical systems, the choice of cathode materials is often the key to determining the ability to adsorb metal ions. Different cathode materials have different electronic conductivity and catalytic activity, selectivity, metal deposition morphology and purity, service life and stability, resulting in low ion removal efficiency.

[0003] From the above, it can be seen that the electrochemical treatment process has obvious advantages in removing ions from wastewater and has important research value and engineering application significance. However, the bottleneck that currently restricts the stable operation of the electrochemical deionization system, especially the cathode material for copper ions, has not yet been broken through and needs to be solved urgently. Utility Model Content

[0004] The purpose of the utility model is to improve the adsorption capacity of the electrochemical treatment system under the working condition of treating copper ions, while enabling the residence time to be accurately controlled, thereby enhancing the controllability of the adsorption, optimizing the resistance encountered by the water flow when passing through, and improving the adsorption efficiency of copper ions in sewage.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A novel electrochemical treatment system for copper ions in sewage comprises a controller, an isopotential meter and a reaction tank, wherein the controller is connected to the isopotential meter and the reaction tank in sequence through wires; a water inlet and a water outlet are respectively arranged on both sides of the reaction tank, and a load platform is fixed in the reaction tank; an opening is arranged in the middle of the load platform, and a main reaction device is fixedly connected to the opening through a detachable connector; a cathode conductive ring is arranged in the middle of the main reaction device, an anode conductive ring is arranged on the periphery of the cathode conductive ring, and an insulating layer is arranged between the cathode conductive ring and the anode conductive ring.

[0007] In the technical solution of the utility model, electromagnetic valves and flow meters are provided at the water inlet and outlet.

[0008] In the technical solution of the utility model, the load platform is arranged above the water inlet and outlet.

[0009] In the technical solution of the utility model, the opening in the middle of the load platform is a circular opening.

[0010] In the technical solution of the utility model, the detachable connecting piece is disc-shaped, and a buckle is provided on the detachable connecting piece. The main device is fixedly connected to the load platform via the buckle on the detachable connecting piece.

[0011] In the technical solution of the utility model, the cathode conductive ring is provided with a cathode electrode slot installation groove, the cathode electrode slot installation groove is provided with a cathode electrode slot, and the cathode electrode slot is provided with a cathode; the anode conductive ring is provided with an anode electrode slot and a reference electrode slot, and the anode electrode slot and the reference electrode slot are provided with an anode and a reference electrode, respectively.

[0012] In the technical solution of the utility model, one or more cathodes are arranged on the cathode electrode slot.

[0013] In the technical solution of the utility model, the cathode has multiple shapes.

[0014] In the technical solution of the utility model, the cathode is connected to the equipotential meter through a cathode electrode wire.

[0015] In the technical solution of the utility model, the anode is connected to the equipotential meter through an anode electrode wire.

[0016] In the technical solution of the utility model, the reference electrode is connected to the isopotential meter through a reference electrode wire.

[0017] In some more specific technical solutions:

[0018] The electrochemical treatment system mainly includes a controller, an isopotential meter and a reaction tank. The reaction main equipment is fixed on the load platform in the reaction tank. The two sides of the reaction tank are respectively provided with a water outlet and a water inlet, and the water inlet and outlet are provided with a solenoid valve and a flow meter; wherein the reaction main equipment includes a cathode conductive ring and an anode conductive ring. The system can meet the parameter adjustment requirements in the device under different working conditions; after the wastewater enters the device, the copper ions in the water are adsorbed by the cathode, and the device can be removed from the load platform, which is convenient for replacing the electrode and realizing the efficient removal of copper ions in the water.

[0019] In the technical solution of the utility model, a circular opening is provided on the load platform, and the main device of the device contacts the sewage in the water storage tank through the opening, and is fixed to the load platform through a detachable connector, and is provided with a snap fixation to facilitate the replacement of electrodes.

[0020] In the technical solution of the utility model, the top center part of the main reaction device is a cathode conductive ring, and it leads to the water storage tank. Water can flow naturally through the gap in the middle to reduce resistance.

[0021] The beneficial effects of the utility model are:

[0022] 1. In the technical solution of the utility model, the cathode material uses carbon nanotubes as a carrier to provide a larger specific surface area, which is conducive to the adsorption of copper ions and can increase the adsorption capacity. 2 As a catalyst, it can promote the reaction of copper ions on the electrode surface and improve the adsorption efficiency. It has a certain selective adsorption capacity for copper ions, which can more effectively remove copper ions in water and reduce interference with other ions. And the hydrothermal synthesis method is adopted, so that the electrode has good structural stability and chemical stability, and can maintain good adsorption performance during long-term use. After the composite electrode adsorbs copper ions, it can be regenerated and reused by appropriate methods, which reduces the cost of use.

[0023] 2. In the utility model, by arranging electromagnetic valves and flowmeters at the water inlet and the water outlet, the residence time of sewage in the device can be accurately controlled. The controller is connected to the electromagnetic valve and the flowmeter, and the flow rate and residence time of sewage can be adjusted according to actual needs to meet the treatment requirements under different working conditions. This precise control makes the adsorption process more controllable, and can ensure that the copper ions are in full contact with the cathode, thereby improving the adsorption efficiency. At the same time, the stable treatment effect helps to ensure the stability of the effluent water quality and reduce fluctuations. For example, when treating sewage containing copper ions of different concentrations, the residence time of sewage can be accurately adjusted according to the concentration of copper ions and the treatment requirements, so that the copper ions have enough time to be adsorbed by the cathode, thereby improving the removal effect. Moreover, this controllability can also adapt to different treatment scales and working condition changes, thereby improving the flexibility and adaptability of the device.

[0024] 3. In the utility model, the top center part of the main reaction equipment is a cathode conductive ring, and it leads to the water storage tank. The water can flow naturally through the gap in the middle, reducing the resistance of the water flow. This design reduces energy loss, so that under the same energy supply, the sewage can flow more smoothly and fully contact the cathode and anode. Optimizing water flow resistance helps to improve the adsorption efficiency of copper ions, increases the contact opportunities between copper ions and the cathode surface, thereby improving the speed and effect of adsorption. At the same time, reducing energy consumption also meets the requirements of energy conservation and environmental protection, and reduces processing costs. For example, in actual applications, compared with traditional treatment devices, the system of the utility model can achieve higher copper ion removal efficiency at lower energy consumption, which not only saves energy, but also improves processing efficiency, with significant economic and environmental benefits.

[0025] In summary, the utility model has obvious advantages in achieving precise control of sewage residence time and optimizing water flow resistance. These beneficial effects help to improve the efficiency and quality of sewage treatment, reduce costs, and have important practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a working principle diagram of the electrochemical treatment system in the utility model.

[0027] Figure 2 This is a working principle diagram of the reaction main device 5 in the present utility model.

[0028] Among them: 1 is the water inlet, 2 is the inlet solenoid valve, 3 is the inlet flowmeter, 4 is the load platform, 5 is the main reaction equipment, 6 is the anode electrode slot, 7 is the cathode conductive ring, 8 is the anode conductive ring, 9 is the cathode electrode slot installation groove, 10 is the cathode electrode slot, 11 is the reference electrode slot, 12 is the outlet solenoid valve, 13 is the outlet flowmeter, 14 is the water outlet, 15 is the anode electrode wire, 16 is the cathode electrode wire, 17 is the reference electrode wire, 18 is the isopotential meter, 19 is the controller, and 20 is the cathode. DETAILED DESCRIPTION

[0029] The equipotential meter 18 and the controller 19 of the utility model are both commercially available products; the model of the equipotential meter 18 is the ETCR3600 intelligent equipotential tester, and the model of the controller 19 is the SG170-BGCM embedded industrial computer.

[0030] The present invention is further described below in conjunction with the embodiments, but the protection scope of the present invention is not limited thereto:

[0031] like Figure 1 , 2As shown, a novel electrochemical treatment system for copper ions in sewage includes a reaction tank, an isopotential meter 18, and a control system 19. A load platform 4 is arranged in the reaction tank and located above the water inlet 1 and the water outlet 14. The opening in the middle of the load platform 4 is a circular opening. The reaction main device 5 is fixedly connected to the load platform 4 through a buckle on a disc-shaped detachable connector. The middle of the reaction main device 5 is a cathode conductive ring 7, and a cathode electrode slot installation groove 9 is provided on the cathode conductive ring 7. A cathode electrode slot 10 is installed on the cathode electrode slot installation groove 9. The cathode electrode slot 10 is used to install one or more cathodes 20 of different shapes. The outer ring is an anode conductive ring 8. An insulating layer is provided between the cathode conductive ring 7 and the anode conductive ring 8. The anode conductive ring is provided with an anode electrode slot 6 and a reference electrode slot 11 for installing the anode and the reference electrode. The water inlet 1 is provided with an inlet solenoid valve 2 and an inlet flowmeter 3, and the water outlet 14 is provided with an outlet solenoid valve 12 and an outlet flowmeter 13. The cathode is connected to the isopotential meter 18 via the cathode wire 16 , the anode is connected to the isopotential meter 18 via the anode wire 15 , the reference electrode is connected to the isopotential meter 18 via the reference electrode wire 17 , and the isopotential meter 18 is controlled by the controller 19 .

[0032] The cathode is a carbon nanotube (MWCNTs) carrier, TiO 2 The composite electrode is composed of MWCNTs and TiO 2 The weight ratio is controlled between 1:20 and 1:5.

[0033] The anode is a titanium electrode with high structural strength, long service life, high catalytic activity, strong electron transmission ability and strong corrosion resistance, and the material is pure titanium or titanium alloy.

[0034] The reference electrode material is an Ag / AgCl electrode which has the characteristics of stable potential, accurate measurement of electrode potential, and convenient and precise control.

[0035] The cathode potential of the system during operation is -0.4v to -1.4v, and the anode potential is 0.2v to 1.4v.

[0036] The specific working process and principle of this utility model:

[0037] In the technical solution of the utility model, the electrochemical method for removing copper ions from sewage comprises the following steps:

[0038] S1: According to the volume of sewage to be treated and the concentration of ions, the total loading area of ​​the cathode on the main device is determined and loaded; at the same time, the residence time of sewage is controlled on the controller, and the flow rate is monitored in real time;

[0039] S2: Assemble the main reaction equipment and fix it on the load platform through buckles;

[0040] S3: Open the solenoid valve at the water inlet, and let in the sewage to be treated, so that the anode, cathode and reference electrode are completely immersed in the sewage;

[0041] S3: Connect the anode, cathode and reference electrode to the isopotential meter through wires to form a stable closed circuit, and determine the output power of the constant potential meter according to the actual situation, so that the cathode potential is -0.4v~-1.4v;

[0042] S4: Start the isopotential meter. After applying the electrode potential, the copper ions in the sewage are reduced to copper atoms attached to the surface of the cathode, so as to achieve the purpose of removing copper ions in the sewage;

[0043] S5: During the reaction, the anode potential is always kept at 0.2V~1.4V;

[0044] S6: The current size and changes during the whole process are monitored in real time by means of a detector to reflect the concentration of copper ions. Based on the information fed back by the detector, the controller automatically turns on or off the constant potential instrument and adjusts the potential of the anode and cathode to control the reduction rate and reaction time of copper ions to achieve the best electrochemical reduction effect.

[0045] The above is only one embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

[0046] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

Claims

1. A novel electrochemical treatment system for copper ions in sewage, characterized in that: The system comprises a controller (19), an isopotential meter (18) and a reaction tank, wherein the controller (19) is connected to the isopotential meter (18) and the reaction tank in sequence through a wire; a water inlet (1) and a water outlet (14) are respectively provided on both sides of the reaction tank, and a load platform (4) is fixed in the reaction tank; an opening is provided in the middle of the load platform (4), and a reaction main body device (5) is fixedly connected to the opening through a detachable connector; a cathode conductive ring (7) is provided in the middle of the reaction main body device (5), an anode conductive ring (8) is provided on the periphery of the cathode conductive ring (7), and an insulating layer is provided between the cathode conductive ring (7) and the anode conductive ring (8).

2. The copper ion electrochemical treatment system according to claim 1, characterized in that: The load platform (4) is arranged above the water inlet (1) and the water outlet (14).

3. The copper ion electrochemical treatment system according to claim 1, characterized in that: The water inlet (1) is provided with an inlet electromagnetic valve (2) and an inlet flow meter (3); the water outlet (14) is provided with an outlet electromagnetic valve (12) and an outlet flow meter (13).

4. The copper ion electrochemical treatment system according to claim 1, characterized in that: The opening in the middle of the load platform (4) is a circular opening.

5. The copper ion electrochemical treatment system according to claim 1, characterized in that: The detachable connecting piece is in the shape of a disc and is provided with a buckle.

6. The copper ion electrochemical treatment system according to claim 1, characterized in that: The cathode conductive ring (7) is provided with a cathode electrode slot installation groove (9), a cathode electrode slot (10) is installed on the cathode electrode slot installation groove (9), and a cathode (20) is installed in the cathode electrode slot (10).

7. The copper ion electrochemical treatment system according to claim 1, characterized in that: The anode conductive ring (8) is provided with an anode electrode slot (6) and a reference electrode slot (11), and an anode electrode and a reference electrode are installed in the anode electrode slot (6) and the reference electrode slot (11), respectively.

8. The copper ion electrochemical treatment system according to claim 6, characterized in that: One or more cathodes are arranged in the cathode electrode slot (10).

9. The copper ion electrochemical treatment system according to claim 7, characterized in that: The anode is connected to an isopotential meter (18) via an anode electrode wire (15); and the reference electrode is connected to an isopotential meter (18) via a reference electrode wire (17).

10. The copper ion electrochemical treatment system according to claim 8, characterized in that: The cathode is connected to an isopotential meter (18) via a cathode electrode wire (16).

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