An electrocatalytic oxidation device for deep treatment of landfill leachate

Abstract

This invention provides an electrocatalytic oxidation device for deep treatment of landfill leachate, comprising a leachate treatment tank and an electrode assembly, an aeration pipe assembly, an ultrasonic assembly, and a flow promoter disposed within the leachate treatment tank. The electrode assembly is positioned near the left end of the leachate treatment tank, with the aeration pipe assembly located below it. The ultrasonic assembly and the flow promoter are respectively disposed on the inner sidewall of the leachate treatment tank. This invention enhances pollutant degradation efficiency through the optimized layout of the electrode assembly combined with the synergistic effects of aeration, ultrasound, and flow promotion. Simultaneously, it utilizes a scum filter and scum discharge structure to achieve effective scum separation, offering advantages such as improved electrode reaction efficiency, optimized scum separation effect, extended hydraulic retention time, and reduced operating costs.

Description

Technical Field

[0001] This utility model belongs to the field of municipal solid waste treatment technology, and relates to a landfill leachate treatment device, and more particularly to an electrocatalytic oxidation device for deep treatment of landfill leachate. Background Technology

[0002] With urban development, urban and rural waste transfer stations generate a large amount of leachate during the compression and washing of waste. This leachate contains many different types of organic acids and chemically complex cycloalkanes and aromatic hydrocarbons, resulting in relatively low biodegradability. Moreover, its concentration exhibits both short-term fluctuations and long-term complex changes. In addition, oily substances from the mixed waste can enter the leachate during the waste compression process, leading to a high oil content in the leachate and making it difficult to treat.

[0003] Currently, landfill leachate treatment mainly employs biological, physical, and chemical methods. Biological methods can remove most biodegradable substances from landfill leachate, offering good treatment efficiency and low cost, and are widely used. However, they cannot remove recalcitrant pollutants, making it difficult to meet discharge standards after treatment with a single technology. Physical methods, such as membrane treatment technology, are limited in their widespread application due to problems such as membrane fouling, clogging, and high costs. Chemical methods, such as advanced oxidation processes, are considered effective methods for treating recalcitrant organic matter.

[0004] In recent years, electrocatalytic oxidation technology has been widely used in the treatment of recalcitrant organic wastewater. It can effectively improve the biodegradability of leachate, and its process structure is simple, occupies a small area, and is easy to manage, which is of great significance for the deep treatment of landfill leachate. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an electrocatalytic oxidation device for deep treatment of landfill leachate, which addresses the shortcomings of existing landfill leachate in terms of floating scum, floating oil and bottom sediment. This device has the advantages of improving electrode reaction efficiency, optimizing scum separation effect, extending hydraulic retention time and reducing operating costs.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0007] An electrocatalytic oxidation device for deep treatment of landfill leachate includes a leachate treatment tank and an electrode assembly, an aeration pipe assembly, an ultrasonic assembly, and a flow promoter disposed within the leachate treatment tank, wherein:

[0008] The electrode assembly is arranged near the left end of the filtrate treatment tank, and the aeration pipe assembly is arranged below it. The ultrasonic component and the flow promoter are respectively arranged on the inner side wall of the filtrate treatment tank.

[0009] Preferably, a circulating pump inlet pipe and a circulating pump outlet pipe are respectively provided on the left side wall of the filtrate treatment tank, wherein:

[0010] The inner end of the circulating pump inlet pipe is connected to the electrode assembly, and the inner end of the circulating pump outlet pipe is connected to the inner cavity of the filtrate treatment tank.

[0011] The inlet pipe of the circulating pump and the outlet pipe of the circulating pump are connected by a pipe through the circulating pump, and the inner end outlet of the inlet pipe of the circulating pump is arranged close to the bottom of the filtrate treatment tank.

[0012] Preferably, an aeration pipe / air inlet is provided at the lower end of the left side wall of the filtrate treatment tank, and an outlet pipe is provided in the middle of the right side wall, wherein:

[0013] The inner end of the air inlet pipe of the aeration pipe is connected to the aeration pipe assembly, and a filter screen is installed on the outlet pipe.

[0014] Preferably, a support plate is horizontally arranged on the inner wall of the right side of the filtrate treatment tank above the outlet pipe, wherein:

[0015] The outer end of the support plate is provided with an inclined upward-facing slag baffle plate, and the slag baffle plate and the right side wall of the filtrate treatment tank form a slag discharge hopper.

[0016] The outer end of the support plate is provided with a water baffle plate arranged at an incline and facing downwards. The water baffle plate is directly opposite the inlet of the outlet pipe, and its lower end is at a lower horizontal height than the inlet of the outlet pipe.

[0017] Preferably, exhaust fans are provided at the upper ends of the front and rear sidewalls of the filtrate treatment tank, and a sealing cover is detachably provided on its top.

[0018] Preferably, the filtrate treatment tank is provided with support feet at the four corners of the bottom, and a sludge hopper is provided at the middle of the bottom, with a sludge discharge pipe and an air outlet on the sludge hopper.

[0019] Preferably, the electrode assembly includes a plurality of anode electrode plates and a plurality of cathode electrode plates, wherein:

[0020] The anode electrode plates and the cathode electrode plates are arranged alternately and staggeredly, and an S-shaped flow channel is formed between the anode electrode plates and the cathode electrode plates.

[0021] Preferably, a scum filter screen is detachably provided at the bottom of the electrode assembly, and the mesh of the scum filter screen serves as the water inlet of the electrode assembly and filters scum.

[0022] Preferably, the aeration pipe assembly uses perforated pipe aeration, and the ultrasonic component uses an ultrasonic generator.

[0023] Preferably, there are at least two propellers, which are spaced apart at the upper end of the inner left side wall of the filtrate treatment tank and are arranged opposite to the baffle plate on the right side wall.

[0024] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0025] The electrocatalytic oxidation device for deep treatment of landfill leachate provided by this utility model includes a leachate treatment tank and an electrode assembly, an aeration pipe assembly, an ultrasonic assembly, and a flow promoter installed in the leachate treatment tank. By optimizing the layout of the electrode assembly and combining the synergistic effects of aeration, ultrasound, and flow promotion, the efficiency of pollutant degradation is enhanced. At the same time, the effective separation of scum is achieved by using a scum filter screen and a scum discharge structure. It has the advantages of improving electrode reaction efficiency, optimizing scum separation effect, extending hydraulic retention time, and reducing operating costs. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of an electrocatalytic oxidation device for deep treatment of landfill leachate according to the present invention;

[0027] Figure 2 This is a cross-sectional schematic diagram of an electrocatalytic oxidation device for deep treatment of landfill leachate according to the present invention;

[0028] Figure 3 This is a cross-sectional schematic diagram of the electrode assembly in an electrocatalytic oxidation device for deep treatment of landfill leachate according to the present invention.

[0029] Figure 4 This is a schematic diagram of the aeration pipe assembly in an electrocatalytic oxidation device for deep treatment of landfill leachate according to the present invention.

[0030] The accompanying figures are labeled as follows:

[0031] 100-Leachate treatment tank; 101-Circulating pump inlet pipe; 102-Circulating pump outlet pipe; 103-Aeration pipe inlet pipe; 104-Outlet pipe; 105-Filter screen; 106-Support plate; 107-Slag baffle plate; 108-Water baffle plate; 109-Slag discharge hopper; 110-Exhaust fan; 111-Support foot; 112-Sludge hopper; 113-Sludge discharge pipe; 114-Drain outlet; 200-Electrode assembly; 201-Anode electrode plate; 202-Cathode electrode; 203-S-shaped flow channel; 204-Scum filter screen; 300-Aeration pipe assembly; 400-Ultrasonic assembly; 500-Flow promoter. Detailed Implementation

[0032] 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.

[0033] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In existing technologies, landfill leachate treatment faces the challenge of insufficient synergy between electrocatalytic oxidation technology and other treatment methods. Traditional electrocatalytic devices often rely solely on electrolysis without effectively combining physical separation methods, leading to scum accumulation that affects electrode activity. When treating high concentrations of oily substances, existing equipment is prone to scale formation on the electrode surface, reducing oxidation efficiency. Some devices use only aeration or stirring methods, which makes it difficult to achieve uniform water quality, resulting in fluctuating treatment effects.

[0035] To address these issues, researchers discovered a correlation between scum accumulation and electrode scaling, and attempted to combine aeration disturbance with the electrolysis reaction. By analyzing bubble movement trajectories, they proposed placing aeration pipes below the electrodes to create a continuous water flow for scouring. To solve the problem of separating fine scum, ultrasonic cavitation was introduced to promote bubble generation. Observing that scum distribution has regional characteristics, a flow promoter was designed to create a directional water flow to guide scum accumulation. Ultimately, a four-dimensional synergistic treatment system integrating electrolysis, aeration, ultrasound, and flow promotion was formed.

[0036] Therefore, in some of these embodiments, such as Figure 1 and Figure 2 As shown, this application proposes a technical solution including a filtrate treatment tank 100 and an electrode assembly 200, an aeration pipe assembly 300, an ultrasonic assembly 400, and a flow promoter 500 disposed within the filtrate treatment tank 100. The electrode assembly 200 is arranged near the left end of the filtrate treatment tank 100, and the aeration pipe assembly 300 is disposed below it. The ultrasonic assembly 400 and the flow promoter 500 are respectively disposed on the inner side wall of the tank.

[0037] The filtrate treatment tank 100 is a closed container for holding the leachate to be treated, which can be constructed using reinforced concrete with an anti-corrosion coating. Its volume can be adjusted according to the treatment capacity. The electrode assembly 200 includes alternating anode and cathode plates, such as titanium-coated electrodes, which are staggered to form curved flow channels to extend the contact time. The aeration pipe assembly 300 can use perforated pipes for aeration, with uniformly spaced openings at fixed intervals. Bottom aeration creates an upward airflow to prevent electrode scaling. The ultrasonic assembly 400 refers to a transducer array installed on the tank wall, such as an ultrasonic generator with a frequency of 20-40kHz, which generates microbubbles through cavitation to promote scum separation. The propeller 500 is a submersible propeller device, such as an adjustable-speed model with a power of 0.75-2.2kW, which pushes surface scum to gather in a specific area.

[0038] Specifically, electrode assembly 200 generates strong oxidizing substances such as hydroxyl radicals after being energized, decomposing recalcitrant organic matter in the leachate. Rising bubbles generated by aeration pipe assembly 300 create turbulence, scouring the electrode surface to prevent oxide deposition. Cavitation bubbles generated by ultrasonic assembly 400 carry suspended particles to the surface, working synergistically with the water flow generated by propeller 500 to guide scum to the scum discharge area. The vertical arrangement of electrode assembly 200 and aeration pipe assembly 300 creates a vertical functional superposition between the electrolysis reaction zone and the air flotation separation zone. The spatial coordination of ultrasonic vibration from ultrasonic assembly 400 and hydraulic propulsion from propeller 500 achieves three-dimensional control of the flow field within the tank.

[0039] Compared to existing technologies, traditional electrocatalytic devices mostly employ planar electrode layouts without considering three-dimensional flow field optimization, resulting in limited treatment efficiency. Existing aeration systems are often independently installed at the bottom of the tank, failing to form a synergistic anti-scaling mechanism with the electrode components. Conventional scum removal devices rely on mechanical scrapers, which can easily cause secondary pollution. This solution, however, constructs a multi-physics synergistic system through a vertical combination of electrodes and aeration, and spatial linkage between ultrasound and flow propulsion.

[0040] Through the above technical solutions, this application achieves simultaneous electrocatalytic oxidation and air flotation separation, effectively decomposing recalcitrant organic matter while promptly removing reaction byproducts. Aeration disturbance maintains electrode surface activity and extends component lifespan. The combination of ultrasonic cavitation and hydraulic propulsion improves scum removal efficiency and prevents secondary sedimentation of suspended solids. The optimized spatial layout of each functional component optimizes the flow field distribution within the tank, ensuring the stability and continuity of the treatment process.

[0041] In some of these embodiments, such as Figure 1 and Figure 2As shown, this application further proposes to provide a circulating pump inlet pipe 101 and a circulating pump outlet pipe 102 on the left side wall of the filtrate treatment tank 100, respectively. The inner end of the circulating pump inlet pipe 101 is connected to the electrode assembly 200, and the inner end of the circulating pump outlet pipe 102 is connected to the inner cavity of the filtrate treatment tank 100. The circulating pump inlet pipe 101 and the circulating pump outlet pipe 102 are connected by a pipe through an external circulating pump, and the inner end outlet of the circulating pump inlet pipe 102 is arranged close to the bottom of the filtrate treatment tank 100.

[0042] Specifically, the circulating pump inlet pipe 101 draws wastewater from the electrode assembly 200 area after the electrolysis reaction. The wastewater is pressurized by the circulating pump and then re-enters the filtrate treatment tank 100 through the circulating pump inlet pipe 102. Because the outlet of the circulating pump inlet pipe 102 is close to the bottom of the tank, the sludge-containing wastewater deposited at the bottom is flushed up, preventing sludge accumulation at the bottom. Driven by the pump, the circulating water forms a forced flow path, promoting thorough mixing of wastewater from different areas within the tank and eliminating localized contaminant accumulation. The wastewater in the electrode assembly 200 area is continuously refreshed, preventing reaction products from adhering to the electrode surface and maintaining stable electrolysis efficiency.

[0043] Through the above technical solution, this application solves the problems of decreased treatment efficiency and localized pollutant accumulation in electrocatalytic oxidation devices caused by uneven water quality. The circulating water flow path promotes rapid replacement of wastewater after electrolysis, preventing scale formation on the electrode surface; the bottom inlet design effectively prevents sludge deposition and maintains dynamic uniformity of water flow inside the tank. The forced circulation system, in conjunction with the tank structure, achieves efficient circulation of wastewater between the electrolysis and mixing zones, improving the degradation efficiency of organic matter.

[0044] In some of these embodiments, such as Figure 1 and Figure 2 As shown, this application further proposes to install an aeration pipe inlet pipe 103 at the lower end of the left side wall of the filtrate treatment tank 100, and an outlet pipe 104 in the middle of the right side wall. The inner end of the aeration pipe inlet pipe 103 is connected to the aeration pipe assembly 300, and a filter screen 105 is installed on the outlet pipe 104.

[0045] The aeration pipe inlet pipe 103 is a channel connecting an external air source to the aeration pipe assembly 300 inside the tank. It can be implemented using a corrosion-resistant metal pipe or an engineering plastic pipe, and is used to transport gas to the area below the electrode assembly. The outlet pipe 104 is a drainage structure located in the middle of the right side wall of the filtrate treatment tank 100. It can be implemented using a flanged pipe section, and is used to discharge the treated water. The filter screen 105 is an interception device installed at the inlet of the outlet pipe 104. It can be implemented using a stainless steel woven mesh or nylon filter cloth, with a mesh density of 20-50 mesh, and is used to block suspended particulate matter.

[0046] Specifically, after the aeration pipe 103 introduces gas into the aeration pipe assembly 300, uniformly distributed microbubbles are formed below the electrode assembly 200. During the bubble's ascent, it adsorbs scum particles generated during electrolysis, causing them to aggregate towards the liquid surface. When the treated water flows out from the middle of the right side wall, the height of the outlet pipe 104 prevents bottom sediment from being carried away, while the filter screen 105 performs secondary filtration, intercepting any remaining tiny scum particles that were not separated by aeration.

[0047] Through the above technical solution, this application achieves effective separation of electrolytic scum and purified water, reducing the risk of filter screen being clogged by large scum particles, and avoiding secondary pollution of effluent water quality caused by scum residue. The rising water flow generated by aeration and the surface flow generated by the flow booster 500 form convection, causing scum to accumulate in the scum discharge hopper 109 area, while the filter screen 105 ultimately intercepts the dispersed microparticles, ensuring that the suspended solids index of the effluent meets the discharge standards.

[0048] In some of these embodiments, such as Figure 1 and Figure 2 As shown, this application further proposes that a support plate 106 is horizontally arranged on the inner side wall of the right side of the filtrate treatment tank 100 above the outlet pipe 104. A slag baffle 107 is arranged inclined upward at the outer end of the support plate 106. The slag baffle 107 and the right side wall of the filtrate treatment tank 100 form a slag discharge hopper 109. A water baffle 108 is also arranged inclined downward at the outer end of the support plate 106. The water baffle 108 is directly opposite the inlet of the outlet pipe 104, and its lower end is horizontally lower than the inlet of the outlet pipe 104.

[0049] The support plate 106 is a load-bearing structure horizontally fixed to the inner wall of the pool. It can be made of 5-15 mm thick steel plate and provides an installation foundation for the scum baffle 107 and the water baffle 108. The scum baffle 107 is an upward-sloping baffle plate connected to the outer end of the support plate 106. It can be made of polypropylene sheet with a 30-45° inclination angle and is used to prevent scum from entering the outlet area. The scum discharge hopper 109 is a semi-enclosed space with an open top, formed by the scum baffle 107 and the pool wall, used to collect and discharge scum. The water baffle 108 is a downward-sloping guide plate connected to the outer end of the support plate 106. It can be made of stainless steel sheet with a 20-35° inclination angle and its lower end is positioned 10-30 cm below the inlet and outlet to form a directional water flow channel.

[0050] Specifically, after the support plate 106 is horizontally fixed to the inner wall of the pool, the baffle plate 107 extending upward from its outer end forms a physical barrier, trapping oily substances and suspended solids floating on the liquid surface within the slag discharge hopper 109. Simultaneously, the water baffle plate 108 extending downward from the outer end of the support plate 106 is directly opposite the inlet of the outlet pipe 104d. The water level difference created by its lower position than the inlet of the outlet pipe 104d guides the water flow at a specific velocity through the area below the water baffle plate 108. The scum accumulated in the slag discharge hopper 109 can be periodically cleaned and discharged. The staggered arrangement of the water baffle plate 108 and the baffle plate 107 completely isolates the scum accumulation area from the outlet channel, ensuring that only purified water flows through the outlet.

[0051] Compared with existing technologies, traditional leachate treatment devices mostly use a single filter screen or sedimentation tank to separate scum, which has drawbacks such as easy clogging of the filter screen and high cleaning frequency of the sedimentation tank. This solution achieves active interception and collection of scum through the combination of scum baffle 107 and scum discharge hopper 109, and at the same time uses the hydraulic guidance of baffle 108 to form a self-cleaning water flow, so as to maintain the unobstructed water outlet without frequent shutdown for cleaning.

[0052] Through the above technical solution, this application effectively solves the problem of pipeline blockage caused by incomplete scum separation. The cooperation between the scum baffle 107 and the scum discharge hopper 109 improves the scum aggregation efficiency, and the water level difference design of the water baffle 108 prevents scum from spreading with the water flow. The synergistic effect of the two reduces the frequency of equipment maintenance, ensures the stability of the effluent water quality, and improves the scum separation efficiency through a combination of physical isolation and water flow guidance.

[0053] In some of these embodiments, such as Figure 1 and Figure 2 As shown, this application further proposes to install exhaust fans 110 at the upper ends of the front and rear sidewalls of the filtrate treatment tank 100, and to install a detachable sealing cover on the top. The exhaust fan 110 refers to a gas exhaust device installed on the upper end of the sidewall of the treatment tank, which can be implemented using an axial flow fan and can be arranged in multiple intervals. The detachable sealing cover refers to a movable closed structure covering the top of the filtrate treatment tank 100, which can be implemented using a polypropylene sheet with clips, and can be quickly installed and removed by bolt fixing.

[0054] Specifically, multiple exhaust fans 110 are installed at the highest points of the front and rear side walls of the treatment tank, forcibly extracting volatile gases generated during the electrocatalytic oxidation reaction to the waste gas treatment system. The sealing cover forms a closed space with the tank body through edge sealing strips, preventing untreated gases from directly escaping to the external environment. When it is necessary to add leachate, inspect electrode components, or clean scum, the fixing device of the sealing cover can be removed to open the cover. After maintenance, it can be reinstalled to restore the sealed state.

[0055] In some of these embodiments, such as Figure 1 and Figure 2 As shown, this application further proposes that support feet 111 be respectively installed at the four corners of the bottom of the filtrate treatment tank 100, and a sludge hopper 112 be installed at the center of the bottom. The sludge hopper 112 is equipped with a sludge discharge pipe 113 and a drain outlet 114. The support feet 111 refer to the structural components located at the four corners of the bottom of the tank. The sludge hopper 112 is a funnel-shaped structure located at the center of the tank bottom, which can be implemented using an inclined concrete trough or a welded steel plate structure. Its function is to collect the precipitates generated during electrolysis through gravity settling. The sludge discharge pipe 113 is a pipe connected to the bottom of the sludge hopper 112, which can be implemented using a corrosion-resistant PVC pipe or a metal pipe. Its function is to direct the precipitates out of the tank. The drain outlet 114 is an opening located on the side wall of the sludge hopper, which can be implemented using a flanged valve structure. Its function is to completely drain the liquid from the tank during maintenance.

[0056] Specifically, the support feet 111 maintain the tank's horizontal position through a four-point support system, preventing structural displacement due to foundation settlement. The sludge hopper 112 is located at the lowest point of the tank bottom. Sludge produced by the electrolysis reaction slides down the tank's slope under gravity into the hopper, forming a concentrated accumulation. The sludge discharge pipe 113 connects to the bottom of the sludge hopper 112. When the sludge accumulates to a set amount, continuous or intermittent sludge discharge can be achieved by opening a valve. The vent 114 is located on the side wall of the sludge hopper 112 above the bottom. When thorough cleaning or maintenance is required, both the sludge discharge pipe 113 and the vent 114 can be opened simultaneously to ensure complete drainage of the tank.

[0057] In some of these embodiments, such as Figure 2 and Figure 3 As shown, this application further proposes that the electrode assembly 200 is provided with a plurality of anode electrode plates 201 and a plurality of cathode electrode plates 202, wherein the plurality of anode electrode plates 201 and the plurality of cathode electrode plates 202 are arranged alternately and staggeredly, and an S-shaped flow channel 203 is formed between the anode electrode plates 201 and the cathode electrode plates 202.

[0058] The alternating staggered arrangement refers to the anode electrode plate 201 and the cathode electrode plate 202 being arranged with left-right intervals and vertical staggers in spatial position, which can be achieved by using the longitudinal height difference between adjacent electrode plates. The S-shaped flow channel 203 refers to the continuous curved flow channel formed by the alternating staggered electrode plates, which forces the fluid to change its flow direction in the gap between adjacent electrode plates.

[0059] Specifically, the staggered arrangement of the anode electrode plate 201 and the cathode electrode plate 202 in the direction perpendicular to the water flow forms a multi-stage baffle structure, guiding the wastewater through the gaps between adjacent electrode plates in an S-shaped path. The local contraction region created by the misalignment of the electrode plates accelerates the fluid movement, while the expansion region forms eddy current disturbances, prolonging the residence time of pollutants on the electrode surface.

[0060] Through the above technical solution, this application achieves multi-stage baffled flow of wastewater within the electrode assembly 200, enabling multiple contact reactions between pollutants and the electrode surface, effectively extending the electrocatalytic oxidation reaction time. The turbulent state formed by the staggered arrangement of the cathode electrode plate 202 and the anode electrode plate 201 hinders the local deposition of scum between the electrode plates, avoiding a decrease in current efficiency due to scum accumulation. The S-shaped flow channel 203 structure increases the effective working area of ​​the electrode within a limited space, improving the treatment capacity per unit volume.

[0061] As one of the preferred embodiments, such as Figure 2 As shown, this application further proposes to install a removable scum filter screen 204 at the bottom of the electrode assembly 200. The mesh of the scum filter screen 204 serves as the water inlet of the electrode assembly 200 and filters scum. The scum filter screen 204 refers to a porous interception structure installed at the water inlet channel of the electrode assembly. Specifically, it can be implemented using a mesh plate made of stainless steel or corrosion-resistant polymer material, with a mesh size of, for example, 2-5 mm, used to trap suspended solids and scum particles.

[0062] Specifically, when wastewater enters the electrode assembly from the bottom of the filtrate treatment tank 100, it first passes through the mesh structure of the scum filter screen 204, where larger scum particles are intercepted on the outside of the screen. The filtered water then enters the electrode plate area for electrocatalytic oxidation, while the intercepted scum, due to its lower density and aeration, gradually rises to the surface. Through this technical solution, this application solves the problem of reduced treatment efficiency in the electrode assembly 200 caused by scum blockage. By combining physical interception with removable cleaning, the continuous operating cycle of the electrode assembly 200 is extended, while reducing the interference of maintenance operations on the treatment process.

[0063] In some of these embodiments, such as Figure 2 and Figure 4 As shown, this application further proposes that the aeration pipe assembly 300 adopts pipe perforation aeration, and the ultrasonic assembly 400 adopts an ultrasonic generator. An ultrasonic generator is a device that converts electrical energy into high-frequency mechanical vibration through a piezoelectric transducer. Specifically, it can be implemented using a transducer assembly with a frequency range of 20-100kHz, which transmits vibrational energy through a liquid medium to generate a cavitation effect.

[0064] Specifically, the perforated aeration system in the pipeline releases microbubbles that form a stable gas-liquid mixture layer as they rise. The uniformly dispersed bubbles effectively adsorb suspended scum generated during the electrolysis reaction, preventing scum accumulation in localized areas due to differences in aeration intensity. The high-frequency vibrations generated by the ultrasonic generator create periodic pressure changes in the liquid, prompting the formation and rapid growth and collapse of bubble nuclei. The resulting microjets can strip away deposits on the electrode surface while simultaneously accelerating the collision and aggregation of scum particles. The synergistic effect of aeration and ultrasound manifests as follows: microbubbles act as scum carriers, achieving initial floating and separation; the ultrasonic cavitation effect enhances the scum breakup and re-aggregation process. The combination of these two technologies forms a multi-stage scum separation mechanism.

[0065] In some specific implementations, such as Figure 4 As shown, the aeration pipe assembly 300 consists of several horizontally and vertically crisscrossed and interconnected pipes, with evenly spaced openings on the pipes to achieve aeration. Figure 2 As shown, the ultrasonic component 400 employs at least one ultrasonic generator, and the transducer array of the ultrasonic generator can be arranged at intervals along the side wall of the treatment pool, with a set of transducer units set at intervals of 0.5m-1.5m.

[0066] In some of these embodiments, such as Figure 1 and Figure 2 As shown, this application further proposes at least two propellers 500, which are spaced apart at the upper end of the left inner wall of the filtrate treatment tank 100, and arranged opposite to the baffle plate 107 on the right wall. The propeller 500 refers to a device that generates directional water flow propulsion through mechanical movement, specifically a structure using a submersible motor driving a propeller. Its high-level arrangement allows it to preferentially act on the surface flow of the liquid.

[0067] Specifically, two thrusters 500, positioned high on the left side wall, generate unidirectional surface water flow, creating a superimposed thrust field that acts on the scum layer on the liquid surface. The spatial correspondence between the thrusters 500 and the right-side baffle plate 107 allows the water flow to carry the scum along a diagonal direction, forming a scum-rich area under the interception effect of the baffle plate 107. The surface shear flow generated by the high-positioned thrusters 500 can penetrate the surface tension layer of the scum while avoiding disturbance to the water stability of the electrode reaction zone. The spacing of the thrusters 500 extends the water flow coverage to more than 70% of the pool width, forming a closed-loop scum transport channel together with the baffle plate 107, enabling continuous migration of scum from the generation area to the scum discharge hopper.

[0068] Through the above technical solution, this application achieves efficient directional migration of the scum layer, solving the problem of electrode surface scaling caused by scum retention in traditional electrocatalytic oxidation devices. The spatial arrangement of the flow booster 500 and the baffle plate 107 increases the scum aggregation speed by more than two times. The dual flow booster 500 layout reduces the dead zone area of ​​the tank to less than 5%, ensuring that the scum removal rate remains stable at over 98%.

[0069] Combination Figures 1 to 4 As shown, the electrocatalytic oxidation device for deep treatment of landfill leachate in this application enhances the pollutant degradation efficiency by combining the optimized layout of the electrode assembly 200 with the synergistic effects of aeration, ultrasound, and propulsion of the aeration pipe assembly 300, ultrasonic assembly 400, and flow promoter 500. At the same time, it achieves effective separation of scum by utilizing the scum filter screen 204 and the scum discharge structure. It has the advantages of improving electrode reaction efficiency, optimizing scum separation effect, extending hydraulic retention time, and reducing operating costs.

[0070] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0071] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0072] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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. An electro-catalytic oxidation device for advanced treatment of landfill leachate, characterized in that, It includes a filtrate treatment tank (100) and an electrode assembly (200), an aeration pipe assembly (300), an ultrasonic assembly (400), and a flow promoter (500) disposed within the filtrate treatment tank (100), wherein: The electrode assembly (200) is arranged near the left end of the filtrate treatment tank (100), and the aeration pipe assembly (300) is arranged below it. The ultrasonic assembly (400) and the flow booster (500) are respectively arranged on the inner sidewall of the filtrate treatment tank (100).

2. The electro-catalytic oxidation device for the advanced treatment of landfill leachate according to claim 1, characterized in that, The left side wall of the filtrate treatment tank (100) is respectively provided with a circulating pump inlet pipe (101) and a circulating pump outlet pipe (102), wherein: The inner end of the circulating pump inlet pipe (101) is connected to the electrode assembly (200), and the inner end of the circulating pump outlet pipe (102) is connected to the inner cavity of the filtrate treatment tank (100). The circulating pump inlet pipe (101) and the circulating pump outlet pipe (102) are connected by a pipe through the circulating pump, and the inner end outlet of the circulating pump inlet pipe (101) is arranged close to the bottom of the filtrate treatment tank (100).

3. The electro-catalytic oxidation device for the advanced treatment of landfill leachate according to claim 1, characterized in that, The lower end of the left side wall of the filtrate treatment tank (100) is provided with an aeration pipe inlet pipe (103), and the middle of the right side wall is provided with an outlet pipe (104), wherein: The inner end of the aeration pipe inlet pipe (103) is connected to the aeration pipe assembly (300), and a filter screen (105) is provided on the outlet pipe (104).

4. The electro-catalytic oxidation device for advanced treatment of landfill leachate according to claim 1, characterized in that, A support plate (106) is horizontally installed on the inner wall of the right side of the filtrate treatment tank (100) above the outlet pipe (104), wherein: The outer end of the support plate (106) is provided with an inclined upward-facing baffle plate (107), and the baffle plate (107) and the right side wall of the filtrate treatment tank (100) form a slag discharge hopper (109). The outer end of the support plate (106) is provided with a water baffle (108) arranged at an incline and downwards. The water baffle (108) is directly opposite the inlet of the outlet pipe (104), and its lower end is at a lower horizontal height than the inlet of the outlet pipe (104).

5. The electrocatalytic oxidation device for deep treatment of landfill leachate according to claim 1, characterized in that, The filtrate treatment tank (100) is equipped with exhaust fans (110) at the upper ends of the front and rear side walls, and a sealing cover is detachably installed on its top.

6. The electrocatalytic oxidation device for deep treatment of landfill leachate according to claim 1, characterized in that, The filtrate treatment tank (100) is provided with support feet (111) at the four corners of the bottom, and a sludge hopper (112) is provided at the middle of the bottom. The sludge hopper (112) is provided with a sludge discharge pipe (113) and an air vent (114).

7. The electrocatalytic oxidation device for deep treatment of landfill leachate according to claim 1, characterized in that, The electrode assembly (200) is provided with a plurality of anode electrode plates (201) and a plurality of cathode electrode plates (202), wherein: A plurality of the anode electrode plates (201) and a plurality of the cathode electrode plates (202) are arranged alternately and staggeredly, and an S-shaped flow channel (203) is formed between the anode electrode plates (201) and the cathode electrode plates (202).

8. The electrocatalytic oxidation device for deep treatment of landfill leachate according to claim 1, characterized in that, The bottom of the electrode assembly (200) is detachably provided with a scum filter screen (204). The mesh of the scum filter screen (204) serves as the water inlet of the electrode assembly (200) and filters scum.

9. The electrocatalytic oxidation device for deep treatment of landfill leachate according to claim 1, characterized in that, The aeration pipe assembly (300) uses pipe perforation aeration, and the ultrasonic assembly (400) uses an ultrasonic generator.

10. The electrocatalytic oxidation device for deep treatment of landfill leachate according to claim 1, characterized in that, There are at least two propellers (500), which are spaced apart at the upper end of the inner left side wall of the filtrate treatment tank (100) and are arranged opposite to the slag baffle (107) on the right side wall.

Images