A pollution-resistant modified composite electrode module

Abstract

This utility model relates to the technical field of composite electrode modules and discloses an anti-fouling modified composite electrode module. An electrode core is assembled between an upper aluminum frame and a lower aluminum frame. An insulating ring threaded between the upper and lower aluminum frames is sleeved on the outside of the electrode core. An upper end cap is threaded to the top of the upper aluminum frame, and a lower end cap is threaded to the bottom of the lower aluminum frame. The electrode core includes a substrate. A transition layer is assembled on the outer surface of the substrate, and a functional layer is assembled on the outer surface of the transition layer. The substrate, transition layer, and functional layer constitute a three-level functional gradient of "bulk conductivity - ion buffering - catalytic antifouling". Liquid passes through vertically and through microfluidic channels, realizing the simultaneous operation of "electrocatalytic oxidation" and "multiple antifouling barriers", thereby maintaining high flux and low transmembrane pressure difference increase in high organic load wastewater, significantly reducing pollutant adhesion and extending electrode life.

Description

Technical Field

[0001] This utility model relates to the field of composite electrode module technology, and in particular to an anti-pollution modified composite electrode module. Background Technology

[0002] Currently, the electrodes used in electrolysis devices in the metallurgical field are mainly lead or lead alloy anodes, titanium anodes, aluminum cathodes, stainless steel cathodes, and titanium cathodes. The main disadvantages of these electrodes are short lifespan, high cost, and easy formation of secondary pollution.

[0003] A composite electrode, as described in application number CN201220312958.0, comprises a conductive base layer in the core and panels located on both sides of the conductive base layer. The conductive base layer is an aluminum plate, and the panels are metal panels. Therefore, this invention enables the realization of an insoluble electrolytic anode, replacing existing lead anodes.

[0004] However, electrochemical electrodes are prone to deactivation in complex wastewater environments due to the adhesion of organic matter, colloids, and microorganisms, leading to reduced water flux, increased energy consumption, and shortened lifespan. Existing technologies mostly employ simple hydrophilic modification or scraping cleaning, which have the following shortcomings:

[0005] 1. Limited surface properties and limited anti-fouling effect;

[0006] 2. The electrode and reactor are integrated into one design, making them non-removable and difficult to clean;

[0007] 3. Lack of a systematic cleaning process for modified surfaces, which can easily damage the active layer.

[0008] Therefore, this invention proposes an anti-pollution modified composite electrode module to solve the above problems. Utility Model Content

[0009] The purpose of this invention is to provide an anti-pollution modified composite electrode module that can significantly inhibit pollutant adhesion, maintain high throughput, long lifespan, and is easy to regenerate on-site. It also provides a corresponding cleaning process, providing theoretical and engineering basis for actual wastewater treatment.

[0010] To achieve the above objectives, this utility model provides the following technical solution: an anti-pollution modified composite electrode module, comprising an upper aluminum frame and a lower aluminum frame arranged opposite to each other, wherein an electrode core is assembled between the upper aluminum frame and the lower aluminum frame, an insulating ring threadedly connected between the upper aluminum frame and the lower aluminum frame is sleeved on the outer side of the electrode core, an upper end cover is threadedly connected to the top of the upper aluminum frame, a lower end cover is threadedly connected to the bottom of the lower aluminum frame, and an electrode terminal is fixedly installed on the upper end cover;

[0011] The electrode core includes a substrate, the outer surface of which is covered with a transition layer, and the outer surface of which is covered with a functional layer.

[0012] Preferably, the substrate is a three-dimensional porous titanium mesh with a thickness of 1-2 mm, a porosity of 65%-80%, and a pore size of 100-500 μm.

[0013] Preferably, the transition layer is a TiO2 nanotube array generated by micro-arc oxidation, with a thickness of 2-5 μm.

[0014] Preferably, the functional layer is a titanium suboxide coating with a thickness of 0.5-2 μm, and the surface is treated with plasma to form a micro-nano composite topology structure, thereby achieving ternary control.

[0015] Preferably, the functional layer is surface-controlled by ternary regulation, surface-modified with oxygen vacancies, static water contact angle ≤10°, nanoscale protrusions of 50-200nm, which are combined with micron-scale channels, Ra of 20-50nm, surface enriched with negative charge, and zeta potential of -30mV to -50mV.

[0016] Preferably, a water guiding channel corresponding to the electrode core is provided in the middle of both the upper and lower aluminum frames, and a water distribution hole corresponding to the water guiding channel is provided in the middle of both the upper and lower end caps.

[0017] Preferably, a water-gathering groove is provided in the middle of the top of the substrate, and the water-gathering groove is an arc-shaped groove.

[0018] Preferably, the inner wall of the upper aluminum frame is flush with the top of the electrode core, and the inner wall of the lower aluminum frame is provided with a water trough, which is a conical trough and communicates with the water guiding channel.

[0019] Preferably, the upper end cover has a mounting hole, and the electrode terminal passes through the mounting hole and is fixed to the top of the upper aluminum frame with silver paste.

[0020] The technical effects and advantages of this utility model are as follows:

[0021] The electrode core of this invention comprises a substrate, a transition layer, and a functional layer. These three layers constitute a three-level functional gradient of "bulk conductivity - ion buffering - catalytic antifouling." Liquid flows through vertically and via microfluidic channels, enabling simultaneous operation of "electrocatalytic oxidation" and "multiple antifouling barriers." This maintains high flux and low transmembrane pressure gradient in wastewater with high organic loads. By regulating the hydrophilicity, roughness, and charge of the electrode surface, pollutant adhesion is reduced, and electrode lifespan is extended. Adjusting the hydrophilicity, roughness, and charge of the composite electrode surface improves the water flux and retention capacity of the porous electrode, alleviating electrode fouling. This provides a theoretical basis and reference for modified electrodes treating actual wastewater. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0024] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the overall exploded structure of this utility model.

[0026] In the diagram: 1. Upper aluminum frame; 2. Lower aluminum frame; 3. Insulating ring; 4. Upper end cover; 5. Lower end cover; 6. Electrode terminal; 7. Electrode core; 8. Substrate; 9. Transition layer; 10. Functional layer; 11. Water guiding channel; 12. Water collection tank; 13. Lower water tank; 14. Water distribution hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 4 As shown, this embodiment discloses an anti-pollution modified composite electrode module, including an upper aluminum frame 1 and a lower aluminum frame 2 arranged opposite to each other, and an electrode core 7 is assembled between the upper aluminum frame 1 and the lower aluminum frame 2. An insulating ring 3 is threadedly connected between the upper aluminum frame 1 and the lower aluminum frame 2 on the outer side of the electrode core 7. Annular threaded grooves are opened on the opposite side walls of the upper aluminum frame 1 and the lower aluminum frame 2. The insulating ring 3 is threadedly installed inside the annular threaded groove, and an O-ring is nested inside the annular threaded groove. An upper end cover 4 is threadedly connected to the top of the upper aluminum frame 1, and a lower end cover 5 is threadedly connected to the bottom of the lower aluminum frame 2. An electrode terminal 6 is fixedly installed on the upper end cover 4. Both the upper end cover 4 and the lower end cover 5 are threadedly connected to the aluminum frame, increasing the quick-release capability of the structure.

[0029] Please see Figures 2-4 The electrode core 7 includes a substrate 8, with a transition layer 9 covering the outer surface of the substrate 8. A functional layer 10 is then mounted on the outer surface of the transition layer 9. The functional layer 10, transition layer 9, and substrate 8 work synergistically to significantly inhibit contaminant adhesion, maintain high throughput, long lifespan, and facilitate on-site regeneration. The electrolysis process involves electrons moving from the external circuit → substrate 8 → transition layer 9 → functional layer 10, completing charge input. Specifically:

[0030] The substrate 8 is a three-dimensional porous titanium mesh with a thickness of 1-2 mm, a porosity of 65%-80%, and a pore size of 100-500 μm. It provides the transition layer 9 with a high specific surface area and mass transfer channels. It is both a mechanical skeleton and a bulk current collector. The entire titanium mesh is connected to the negative or positive terminal of the power supply, providing a low-resistance electron channel for the entire electrode.

[0031] The transition layer 9 is a TiO2 nanotube array generated by micro-arc oxidation. Micro-arc oxidation can generate a porous TiO2 nanotube array with a thickness of 2-5 μm in situ on the surface of the titanium mesh. The nanotube array increases the specific surface area and provides an "anchor" effect for the functional layer 10, with a shear strength >30 MPa.

[0032] Functional layer 10 is a titanium suboxide coating. The conductive phase of titanium suboxide grows directionally along the nanotubes to form a continuous low-resistivity network. The thickness of the titanium suboxide coating is 0.5-2 μm. The surface is treated with plasma to form a micro-nano composite topology. Micro-arc oxidation and plasma etching are combined to achieve low-cost large-scale preparation. The micro-nano topology is composed of the outer diameter of the nanotubes and titanium suboxide particles. Functional layer 10 is ternarily controlled on the surface. The surface of the titanium suboxide coating is modified with oxygen vacancies and enriched with hydroxyl groups. The static water contact angle is ≤10°. The nanoscale protrusions are 50-200 nm in size and are combined with micron-scale channels. The Ra is 20-50 nm. The surface of the titanium suboxide coating is enriched with negative charges and has a zeta potential of -30 mV to -50 mV, which electrostatically repels pollutants.

[0033] The three-dimensional porous titanium mesh and the sub-titanium oxide coating form a low-resistance channel. The surface hydration layer reduces the boundary layer thickness, increasing the flux by 40%-60% compared to the unmodified electrode. The micro-nano rough structure enables water molecules to form a continuous hydration layer, preventing hydrophobic contaminants from contacting the surface. The sub-titanium oxide coating provides a negative potential, generating electrostatic repulsion with negatively charged organic functional groups and colloids. ·OH is generated at low potential, forming an in-situ oxidation adsorption layer for self-cleaning. The transition layer 9 inhibits the oxidation and corrosion of the titanium matrix, and the functional layer 10 provides chemical stability to prevent anodic dissolution.

[0034] Please see Figure 3 and Figure 4 The upper aluminum frame 1 and the lower aluminum frame 2 are both provided with water guiding channels 11 corresponding to the electrode core 7. The upper end cover 4 and the lower end cover 5 are provided with water distribution holes 14 corresponding to the water guiding channels 11. The top of the base 8 is provided with a water gathering groove 12, which is an arc-shaped groove. The inner side wall of the upper aluminum frame 1 is flush with the top of the electrode core 7. The inner side wall of the lower aluminum frame 2 is provided with a lower water groove 13, which is a conical groove and is connected to the water guiding channel 11. The upper end cover 4 is provided with a mounting hole, and the electrode terminal 6 passes through the mounting hole and is fixed to the top of the upper aluminum frame 1 with silver paste.

[0035] In actual use, the liquid to be treated enters the water collection tank 12 through the water distribution hole 14 on the upper end cover 4 and the water guiding channel 11 in the upper aluminum frame 1. This allows the liquid to pass vertically downward through the entire three-dimensional porous titanium mesh. The liquid flows vertically and laterally in the pores, generating secondary flow shear, reducing dead zones, and carrying away microbubbles generated by electro-oxidation to avoid air resistance. After passing through the substrate 8, transition layer 9, and functional layer 10, it is concentrated in the lower water tank 13 inside the lower aluminum frame 2 and then discharged from the lower end cover 5. The substrate 8, transition layer 9, and functional layer 10 constitute a three-level functional gradient of "bulk conductivity - ion buffer - catalytic antifouling". The liquid passes through vertically and through the pores in a micro-flow manner, realizing the simultaneous operation of "electrocatalytic oxidation" and "multiple antifouling barriers", thereby maintaining high flux and low transmembrane pressure difference increase in wastewater with high organic load.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pollution resistant modified composite electrode module characterized by: It includes an upper aluminum frame (1) and a lower aluminum frame (2) arranged opposite to each other, and an electrode core (7) is assembled between the upper aluminum frame (1) and the lower aluminum frame (2). An insulating ring (3) is threadedly connected between the upper aluminum frame (1) and the lower aluminum frame (2) on the outside of the electrode core (7). An upper end cover (4) is threadedly connected to the top of the upper aluminum frame (1), and a lower end cover (5) is threadedly connected to the bottom of the lower aluminum frame (2). An electrode terminal (6) is fixedly installed on the upper end cover (4). The electrode core (7) includes a substrate (8), the outer surface of which is covered with a transition layer (9), and the outer surface of the transition layer (9) is covered with a functional layer (10).

2. The anti-pollution modified composite electrode module according to claim 1, characterized in that: The substrate (8) is a three-dimensional porous titanium mesh with a thickness of 1-2 mm, a porosity of 65%-80%, and a pore size of 100-500 μm.

3. The anti-pollution modified composite electrode module according to claim 2, characterized in that: The transition layer (9) is a TiO2 nanotube array generated by micro-arc oxidation, with a thickness of 2-5 μm.

4. The anti-pollution modified composite electrode module according to claim 3, characterized in that: The functional layer (10) is a sub-titanium oxide coating with a thickness of 0.5-2 μm. The surface is treated with plasma to form a micro-nano composite topology and achieve ternary control.

5. The anti-pollution modified composite electrode module according to claim 4, characterized in that: The functional layer (10) is surface ternary controlled, surface oxygen vacancy modified, static water contact angle ≤10°, nanoscale protrusions of 50-200nm, which are combined with micron-scale channels, Ra of 20-50nm, surface rich in negative charge, and ζ potential of -30mV to -50mV.

6. The anti-pollution modified composite electrode module according to claim 1, characterized in that: The upper aluminum frame (1) and the lower aluminum frame (2) are each provided with a water guiding channel (11) corresponding to the electrode core (7), and the upper end cover (4) and the lower end cover (5) are provided with a water distribution hole (14) corresponding to the water guiding channel (11).

7. The anti-pollution modified composite electrode module according to claim 1, characterized in that: A water-gathering trough (12) is provided in the middle of the top of the substrate (8), and the water-gathering trough (12) is an arc-shaped trough.

8. The anti-pollution modified composite electrode module according to claim 6, characterized in that: The inner wall of the upper aluminum frame (1) is flush with the top of the electrode core (7), and the inner wall of the lower aluminum frame (2) is provided with a water trough (13). The water trough (13) is a conical trough and is connected to the water guiding channel (11).

9. The anti-pollution modified composite electrode module according to claim 1, characterized in that: The upper end cover (4) has a mounting hole, and the electrode terminal (6) passes through the mounting hole and is fixed to the top of the upper aluminum frame (1) with silver paste.

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