An electric remediation device for heavy metal contaminated sludge

Abstract

This utility model relates to the field of heavy metal treatment technology, and in particular to an electric remediation device for heavy metal-contaminated sludge. The device includes a sludge tank into which clean water is injected for mixing. A first pump transports the mixed sludge to a treatment tank. Multiple electrodes are installed at the bottom of the treatment tank; when energized, these electrodes are used to electrically remediate the sludge mixture. One side of the treatment tank is connected to a second pump via pipes and valves. The second pump transports the remediated sludge mixture to a first storage tank. In this electric remediation device for heavy metal-contaminated sludge, clean water is injected into the sludge tank to mix with the sludge, adjusting the concentration and improving fluidity. The first pump delivers the mixed sludge to the treatment tank, where multiple electrodes at the bottom are energized to form an electric field, separating and removing heavy metal ions. Pipes and valves on one side of the treatment tank control the discharge, and in conjunction with the second pump, the remediated mixture is temporarily stored in the first storage tank, completing the remediation process.

Description

Technical Field

[0001] This utility model relates to the field of heavy metal treatment technology, and in particular to an electric remediation device for heavy metal contaminated sludge. Background Technology

[0002] With the rapid development of industrial production (such as mining, smelting, electroplating, and chemical industries) and the acceleration of urbanization, heavy metals (such as lead, cadmium, mercury, chromium, and arsenic) continuously seep into soil and water bodies through wastewater discharge, solid waste accumulation, and atmospheric deposition. Ultimately, these heavy metals accumulate in rivers, lakes, and sedimentation tanks of sewage treatment plants, forming large amounts of heavy metal-polluted sludge. This type of sludge not only occupies land resources and damages the aquatic ecosystem, but the heavy metals it contains may also enter the food chain through infiltration and bioaccumulation, posing a serious threat to human health (such as damaging the nervous, digestive, and respiratory systems, causing chronic poisoning, and even cancer). Therefore, it has become a critical issue that urgently needs to be addressed in the field of environmental governance.

[0003] Electrokinetic remediation, as a novel soil and sludge remediation technology, works by inserting electrodes into the contaminated medium and applying a direct current electric field. The electric field drives heavy metal ions (or charged complexes) to migrate towards the corresponding electrodes, ultimately achieving the separation and removal of heavy metals. It features high remediation efficiency, strong targeting, and good adaptability to low-permeability sludge, and has gradually become a research and application hotspot. However, existing electrokinetic remediation devices still have many shortcomings in practical applications:

[0004] 1. Poor uniformity of sludge treatment: Most devices do not pre-treat the sludge (such as mixing and diluting), resulting in uneven sludge concentration, poor fluidity, insufficient contact between the electrode and the sludge, disordered electric field distribution in some areas, "repair dead zones", and reduced heavy metal removal efficiency.

[0005] 2. Incoherent repair process: Existing devices are mostly single processing units, lacking an integrated design for sludge transportation, phased repair, and subsequent collection. Frequent manual transfer of sludge is required, which not only increases the complexity of operation but also easily causes interruptions in the repair process, affecting processing efficiency and stability.

[0006] 3. Lack of electrolyte regulation: The physicochemical properties of sludge, such as pH and ionic strength, directly affect the occurrence form and migration rate of heavy metals during electrokinetic remediation. However, most existing devices do not have an electrolyte regulator addition structure, making it impossible to adjust the electrochemical environment of the sludge system in real time according to the remediation process. This results in insufficient migration momentum of heavy metals and difficulty in achieving the desired remediation effect.

[0007] 4. Overflow and secondary pollution risks: Some units did not consider the overflow of sludge mixture during the treatment process. If the sludge level is too high or the system pressure changes during the repair process, liquid overflow is likely to occur, causing the separated heavy metal ions to diffuse again. At the same time, the overflow liquid was not specially collected and treated after the repair, which further increased the risk of secondary pollution.

[0008] In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create an electric remediation device for heavy metal contaminated sludge, making it more valuable for industrial use. Utility Model Content

[0009] To address the aforementioned technical problems, the purpose of this utility model is to provide an electric remediation device for heavy metal contaminated sludge.

[0010] This utility model discloses an electric remediation device for heavy metal contaminated sludge, comprising a sludge tank into which clean water is injected for mixing. A first pump transports the mixed sludge to a treatment tank. Multiple sets of electrodes are installed at the bottom of the treatment tank. When the electrodes are energized, they are used to electrically remediate the sludge mixture. The bottom side of the treatment tank is connected to a second pump through a pipeline and a valve. The second pump is used to transport the remediated sludge mixture to a first storage tank.

[0011] This electric remediation device for heavy metal-contaminated sludge serves as a pretreatment component, where the sludge pool mixes with clean water to adjust the sludge concentration and improve its fluidity, laying the foundation for subsequent treatment. The first pump is a conveying component, responsible for stably transporting the mixed sludge from the sludge pool to the treatment tank. The treatment tank is the core remediation component; multiple electrodes at its bottom generate an electric field that electrically remediates the sludge mixture entering the tank, achieving the separation and removal of heavy metal ions. Pipelines and valves on one side of the treatment tank control the discharge of the remediated material. Together with the second pump, which acts as a transfer component, the remediated sludge mixture is smoothly transported to the first storage tank, which serves as a temporary storage component, completing the entire remediation process.

[0012] Furthermore, a first partition is installed in the middle of the processing box, which is sealed to the sides and bottom of the processing box, dividing the processing box into a first box and a second box. The upper end of the first partition has a first overflow hole.

[0013] A first partition is installed in the middle of the treatment box. This first partition is sealed to the inner walls and bottom of the treatment box. Its core function is to divide the internal space of the treatment box into two independent boxes, namely the first box and the second box, so as to realize the phased treatment of the sludge mixture in the treatment box. At the same time, a first overflow hole is opened at the upper end of the first partition. The function of the first overflow hole is to serve as a material flow channel between the first box and the second box. When the sludge mixture in the first box reaches a certain level, it can flow smoothly into the second box through the first overflow hole. This not only avoids excessive accumulation of material in the first box, but also allows the sludge mixture to be treated in stages in the two boxes, thereby improving the overall remediation effect.

[0014] Furthermore, a baffle is fixed inside the first box, and there is a gap between the baffle and the bottom of the first box.

[0015] A baffle is fixedly installed inside the first chamber. This baffle does not completely fit the bottom of the first chamber, but leaves a gap between it and the bottom of the first chamber. The function of the baffle is to block and guide the sludge mixture entering the first chamber, slowing down the flow speed of the sludge mixture in the first chamber and preventing it from passing through the first chamber too quickly and affecting the repair reaction time. At the same time, the gap between the baffle and the bottom of the first chamber allows the sludge mixture to pass through the gap slowly. This ensures that the material can flow normally to the subsequent areas and prolongs the residence time of the sludge mixture in the first chamber, providing more reaction time for the electric repair process and improving the repair effect.

[0016] Furthermore, multiple sets of material tanks are installed on one side of the processing box. Each material tank contains an electrolyte conditioner. The material tanks transport the electrolyte conditioner to the first and second boxes through a delivery pump and corresponding pipelines.

[0017] Multiple sets of material tanks are installed on one side of the treatment tank. The function of each set of material tanks is to store electrolyte conditioner, providing the necessary conditioning medium for the electrokinetic remediation of the sludge mixture inside the treatment tank. During the remediation process, the material tanks can accurately deliver the stored electrolyte conditioner to the first and second tanks separated by the treatment tank through the matching delivery pump and corresponding dedicated pipeline. Its core function is to adjust the electrochemical environment such as pH value and ionic strength of the sludge mixture in the tank in real time by replenishing the electrolyte conditioner to the two tanks respectively, so as to create suitable conditions for the electrokinetic remediation process after the electrodes are energized, help heavy metal ions migrate and separate more efficiently, and improve the overall remediation effect.

[0018] Furthermore, an overflow collection box is placed on the outside of the second box. A certain material bucket is transported to the overflow collection box through a delivery pump and corresponding pipeline. The bottom of the overflow collection box is connected to the third pump through pipeline and valve. The third pump is used to transport the repaired sludge mixture to the second storage box. The upper end of the second box is connected to the overflow collection box through a pipeline.

[0019] An overflow collection tank is installed on the outside of the second tank. Its core function is to collect excess sludge mixture in the second tank to prevent liquid overflow and secondary pollution. At the same time, the upper end of the second tank is connected to the overflow collection tank through a pipeline to ensure that the sludge mixture can flow smoothly into the overflow collection tank when the liquid level in the second tank is too high. One of the material tanks can be transported to the overflow collection tank by a transfer pump and corresponding pipeline. This function is to adjust the electrochemical environment of the sludge mixture in the overflow collection tank to ensure the subsequent treatment effect. The bottom of the overflow collection tank is connected to a third pump through a pipeline and valve. The function of the third pump is to act as a power component to transport the repaired sludge mixture in the overflow collection tank to the second storage tank. The second storage tank is used to temporarily store these repaired materials, realizing the separation of storage from the first storage tank and ensuring the continuous and stable operation of the device.

[0020] Furthermore, each material tank is connected to a feed pipe via a pipeline, and the feed pipe is connected to an electrolyte conditioner raw material tank.

[0021] Each material tank is connected to the feed pipe via a dedicated pipeline, which in turn connects to the electrolyte conditioner raw material tank. The core function of the feed pipe is to act as a transport channel for the electrolyte conditioner, stably delivering the electrolyte conditioner stored in the raw material tank to each material tank. This connection structure continuously replenishes the electrolyte conditioner in the material tanks, preventing the tanks from running out of conditioner and affecting the regulation of the electrochemical environment of the sludge mixture in the treatment tank and overflow collection tank. This ensures the continuity and stability of the electrolyte conditioner supply throughout the entire electric repair process, guaranteeing the efficient progress of the repair operation.

[0022] By means of the above-described solution, the present invention has at least the following advantages:

[0023] 1. Significantly improves the uniformity of sludge treatment and remediation efficiency: By setting up a sludge tank as a pretreatment unit, clean water is injected to mix with the sludge to adjust the concentration and improve fluidity, which solves the problem of insufficient electrode contact caused by sludge clumping and uneven concentration in existing devices. At the same time, the baffle fixed in the first tank slows down the flow speed of the sludge through the "blocking-guiding" effect, prolonging its residence time in the treatment tank. Combined with multiple sets of electrodes at the bottom of the treatment tank, it ensures that the electric field is evenly distributed in the sludge mixture, effectively eliminating "remediation dead zones", greatly improving the migration and separation efficiency of heavy metal ions, and ensuring the remediation effect.

[0024] 2. Achieving integrated repair process and improving operational efficiency and stability: The device, through the power coordination of the first, second, and third pumps, constructs a continuous process of "sludge pretreatment (sludge tank) - phased repair (first tank, second tank) - post-repair material temporary storage (first storage tank, second storage tank)," replacing the existing device's "single processing unit + manual transfer" mode, reducing manual intervention and avoiding interruptions in the repair process; at the same time, the first partition divides the processing tank into two independent tanks, combined with the material flow function of the first overflow hole, to achieve phased repair of sludge mixture, further improving the orderliness and stability of the processing process, and making it suitable for large-scale continuous operation.

[0025] 3. Precisely regulate the electrolyte environment to ensure the remediation effect meets the standards: By installing multiple sets of material tanks on one side of the treatment tank and using a delivery pump to precisely deliver the electrolyte conditioner to the first tank, the second tank, and the overflow collection tank, the electrochemical parameters such as the pH value and ionic strength of the sludge mixture can be adjusted in real time. This solves the problem of insufficient heavy metal migration power caused by the existing device's inability to dynamically adapt to the remediation process. At the same time, the feed pipe connects the material tanks to the electrolyte conditioner raw material tank, realizing the continuous replenishment of the conditioner and ensuring a stable electrochemical environment throughout the remediation process. This provides suitable conditions for the efficient migration of heavy metal ions and ensures that the remediation effect meets the treatment standards.

[0026] 4. Effectively avoid the risks of overflow and secondary pollution, and ensure environmental safety: By setting an overflow collection box on the outside of the second tank and connecting the upper part of the second tank with the overflow collection box through pipelines, excess sludge mixture in the second tank can be collected in a timely manner, preventing liquid overflow that could cause the separated heavy metal ions to diffuse again; at the same time, the third pump transports the repaired material in the overflow collection box to the second storage tank, forming a separate storage with the first storage tank. This not only avoids the accumulation of repaired material affecting the continuous operation of the device, but also achieves closed-loop management of all treated materials, completely solving the secondary pollution risks of the existing device and improving environmental safety.

[0027] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of an embodiment of the present invention;

[0031] In the diagram: 1. Sludge tank; 2. First pump; 3. Processing tank; 4. Second pump; 5. First storage tank; 6. First partition; 7. First housing; 8. Second housing; 9. First overflow hole; 10. Baffle; 11. Material bucket; 12. Overflow collection tank; 13. Third pump; 14. Second storage tank; 15. Feed pipe. Detailed Implementation

[0032] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0033] See Figure 1 First, the heavy metal-contaminated sludge to be treated is introduced into sludge tank 1. Then, clean water is injected into sludge tank 1 to thoroughly mix the water and sludge, thereby adjusting the sludge concentration and improving its fluidity, preventing sludge clumping or excessive concentration from affecting subsequent transport and remediation. After the sludge and water are evenly mixed, the first pump 2 is started. The first pump 2 stably transports the sludge mixture in sludge tank 1 to treatment tank 3 through a pre-set pipeline until the sludge mixture in treatment tank 3 reaches a suitable remediation level. Next, multiple sets of electrodes at the bottom of treatment tank 3 are energized. After the electrodes are energized, a DC electric field is formed inside treatment tank 3. The electric field force drives the charged heavy metal ions in the sludge mixture to migrate towards the electrodes with opposite polarity, thereby achieving electro-remediation of the sludge mixture. When the remediation work is completed, the valve on the bottom pipeline on one side of treatment tank 3 is opened, and the second pump 4 is started simultaneously. The repaired sludge mixture in treatment tank 3 is extracted through pipelines and transported to the first storage tank 5 for temporary storage, so that it can be further processed such as dewatering and solid waste resource utilization. The clear water mixing pretreatment in sludge tank 1 can effectively solve the problems of uneven sludge concentration and poor fluidity, ensuring full contact between the electrodes and the sludge mixture and avoiding "repair dead zones". The cooperation of the first pump 2 and the second pump 4 realizes the automated transportation of sludge from pretreatment to repair and then to temporary storage, reducing manual intervention, reducing operational complexity, and improving overall work efficiency. The multiple sets of electrodes at the bottom of treatment tank 3 can ensure uniform electric field distribution, enhance the migration effect of heavy metal ions, and improve repair efficiency and quality. The temporary storage of the repaired sludge mixture in the first storage tank 5 can prevent the accumulation of materials after repair from affecting the continuous operation of treatment tank 3, ensuring that the device can operate stably and continuously, and is suitable for large-scale sludge repair needs.

[0034] When performing electrokinetic remediation of heavy metal contaminated sludge in the treatment tank 3, the first partition 6 pre-installed in the middle of its interior plays a crucial role. This first partition 6, along with the inner walls and bottom of the treatment tank 3, is installed in a sealed manner, effectively dividing the internal space of the treatment tank 3 into two independent chambers: a first chamber 7 and a second chamber 8. During the operation, the sludge mixture delivered from the first pump 2 first enters the first chamber 7 for initial electrokinetic remediation. When the liquid level of the sludge mixture in the first chamber 7 gradually rises to the position of the first overflow hole 9 at the upper end of the first partition 6, the sludge mixture will smoothly flow into the second chamber 8 through the first overflow hole 9, where the subsequent electrokinetic remediation process continues. To ensure that the sludge mixture undergoes phased and orderly remediation within the treatment chamber 3, the airtight design of the first partition 6 allows the first chamber 7 and the second chamber 8 to form independent remediation spaces. Electrode parameters can be adjusted according to the remediation needs at different stages, improving the remediation specificity. At the same time, it prevents the sludge mixture from mixing too early in the two areas, which would affect the remediation effect. The first overflow hole 9 provides a stable channel for the flow of materials between the two chambers. This prevents excessive accumulation of sludge mixture in the first chamber 7, which could lead to excessive pressure, and ensures that the sludge mixture has sufficient remediation time within the treatment chamber 3. This further improves the removal efficiency of heavy metal ions and makes the entire remediation process more consistent and stable.

[0035] During the initial electro-mechanical repair of the sludge mixture in the first chamber 7, the baffle 10 fixedly installed inside it first comes into contact with the sludge mixture delivered from the first pump 2. Since the baffle 10 is vertically fixed inside the first chamber 7 and does not completely adhere to the bottom of the chamber, leaving a gap between them, the sludge mixture entering the first chamber 7 is first blocked by the baffle 10, significantly slowing its flow rate. Subsequently, it slowly and continuously flows evenly into the subsequent areas of the first chamber 7 from the gap between the baffle 10 and the bottom of the first chamber 7. During this process, it fully receives the electric field generated by the electrodes at the bottom of the treatment tank 3, completing the initial electro-mechanical repair. The blocking effect of baffle 10 can prevent the sludge mixture from passing through the first box 7 too quickly due to excessive conveying power, thus prolonging the residence time of the sludge mixture in the first box 7. This ensures that it has sufficient time to fully interact with the electric field, reducing "repair dead zones" and improving the initial repair effect. At the same time, the gap between baffle 10 and the bottom of the first box 7 can ensure the normal flow of the sludge mixture without accumulation or blockage, maintaining the continuity of the repair process. In addition, the reduced flow rate can make the sludge mixture more evenly distributed in the first box 7, making the intensity of the electric field acting on each part of the sludge mixture more consistent, further improving the uniformity and stability of the initial repair.

[0036] During the electric remediation operation of the sludge mixture in the treatment tank 3, when the electrochemical environment such as pH value and ionic strength of the sludge mixture in the first tank 7 and the second tank 8 changes due to the electric remediation reaction, which affects the migration efficiency of heavy metal ions, the staff can start the delivery pump matched with the material barrels 11. At this time, multiple groups of material barrels 11 installed on one side of the treatment tank 3 will deliver the pre-placed electrolyte regulator in the barrels to the first tank 7 and the second tank 8 accurately through their respective special pipelines. Wherein, the type, dosage and rate of electrolyte regulator delivered by different material barrels 11 can be controlled according to the difference in remediation stages and sludge states of the two tanks, ensuring that both the sludge mixture in the initial remediation stage in the first tank 7 and the sludge mixture in the subsequent remediation stage in the second tank 8 can maintain a suitable electrochemical environment, and guarantee the driving effect of the electric field on heavy metal ions after the electrodes are energized. The advantage of this structure is that: the arrangement of multiple groups of material barrels 11 can store different types of electrolyte regulators respectively, meeting the regulation requirements of different remediation stages of the first tank 7 and the second tank 8, and avoiding the problem that a single regulator cannot adapt to multi-stage remediation. Meanwhile, through the accurate delivery of the delivery pump and the corresponding pipelines, the electrochemical environment inside the tanks can be adjusted in real time and quantitatively, which solves the defect that the existing devices cannot dynamically adapt to the remediation process, resulting in insufficient driving force for heavy metal migration, effectively improves the separation efficiency of heavy metal ions, ensures that the remediation effects of the two tanks can reach the expected standard. In addition, it is not necessary for workers to directly add regulator into the tanks, which reduces operational risks and labor intensity, and guarantees the safety and continuity of the remediation operation.

[0037] When the second tank body 8 of the treatment tank 3 carries out subsequent electric remediation operation on the sludge mixture, if the sludge mixture in the second tank body 8 becomes excessive due to continuous remediation or rising liquid level, the excessive sludge mixture will naturally flow into the overflow collection tank 12 placed outside through the pipeline connected to the upper end of the second tank body 8, so as to prevent the mixed liquid from overflowing from the second tank body 8 and causing pollution. Meanwhile, considering that the sludge mixture overflowed into the overflow collection tank 12 may affect subsequent treatment due to environmental changes, the delivery pump matched with a certain material barrel 11 can be started, and the electrolyte regulator in the material barrel 11 can be accurately delivered to the overflow collection tank 12 through the corresponding pipeline to adjust the electrochemical environment of the mixed liquid in the tank, so as to ensure that it still has good conditions for subsequent treatment. After a certain amount of the remediated sludge mixture is collected in the overflow collection tank 12, the valve on the pipeline at the bottom of the overflow collection tank 12 is opened, and the third pump 13 is started. The third pump 13 can stably deliver the remediated sludge mixture in the tank into the second storage tank 14 for temporary storage, thus completing the closed-loop treatment of the overflow mixed liquid. The arrangement of the overflow collection tank 12 effectively solves the problem of mixed liquid overflow from the second tank body 8, prevents the leakage of treated or to-be-treated mixed liquid from causing secondary pollution, and improves the safety of the operation environment. By delivering the electrolyte regulator to the overflow collection tank 12 through the material barrel 11, the stability of the electrochemical environment of the overflow mixed liquid can be ensured, the remediation quality thereof is not affected, and the subsequent treatment effect is guaranteed. The cooperation between the third pump 13 and the second storage tank 14 realizes the timely transfer and temporary storage of the overflow mixed liquid, prevents the overflow collection tank 12 from being full and overflowing, and realizes split storage together with the first storage tank 5, reduces the load on a single storage tank, guarantees the continuity and stability of the remediation process of the whole device, and improves the overall operation efficiency.

[0038] During the operation of the electric remediation device for heavy metal contaminated sludge, when the electrolyte conditioner stored in the multiple sets of tanks 11 installed on one side of the treatment tank 3 becomes insufficient due to continuous supply to the first tank 7, the second tank 8, and the overflow collection tank 12, each tank 11 is connected to the feed pipe 15 via a dedicated pipeline, and the feed pipe 15 is connected to the external electrolyte conditioner raw material tank. The reserve conditioner in the electrolyte conditioner raw material tank will automatically or with slight power assistance flow into each tank 11 through the corresponding pipeline along the feed pipe 15. Operators can monitor the replenishment of conditioner in the tanks 11 in real time by observing the liquid level markings or using liquid level sensors, ensuring that each tank 11 always maintains a sufficient reserve of electrolyte conditioner to meet the supply requirements of conditioner at different remediation stages. The advantages of this structure are as follows: the interconnected design of the feed pipe 15 with the material tank 11 and the electrolyte conditioner raw material tank enables automatic and continuous replenishment of the electrolyte conditioner, eliminating the need for frequent manual addition of conditioner to each material tank 11 by staff. This significantly reduces the intensity and frequency of manual operation and prevents interruption of electrochemical environment control during the repair process due to the depletion of conditioner in the material tank 11. This ensures the stability of the sludge mixture repair environment in the first tank 7, the second tank 8, and the overflow collection tank 12, thereby ensuring that the migration and separation efficiency of heavy metal ions is not affected. In addition, the design of dedicated pipelines corresponding to each material tank 11 allows for precise control of the type of conditioner added to different material tanks 11. If the raw material tanks store different types of conditioners or dosages, it meets the differentiated reserve needs of multiple sets of material tanks 11, further improving the reliability and continuity of the device operation.

[0039] The working principle of this utility model is as follows:

[0040] Sludge pretreatment stage: First, the heavy metal contaminated sludge to be remediated is introduced into sludge tank 1, and clean water is injected into sludge tank 1 to fully mix the clean water with the sludge. This is to adjust the sludge concentration and improve its fluidity, so as to avoid the sludge from clumping or having too high a concentration, which would affect subsequent transportation and remediation operations. After the pretreatment is completed, the sludge is ready for subsequent transportation.

[0041] Sludge transport to treatment tank stage: Start the first pump 2. The first pump 2 stably transports the uniformly mixed sludge mixture in the sludge tank 1 to the treatment tank 3 through the preset pipeline until the sludge mixture in the treatment tank 3 reaches the appropriate liquid level for electric repair. Then turn off the first pump 2 and prepare to enter the repair stage.

[0042] The phased electric repair stage consists of two steps: First, multiple electrodes at the bottom of the treatment tank 3 are energized. The DC electric field formed by the electrodes initially performs electric repair on the sludge mixture entering the first tank 7. During this process, the baffle 10 inside the first tank 7 prevents the sludge mixture from flowing rapidly, allowing it to slowly pass through the gap between the baffle 10 and the bottom of the first tank 7, extending the residence time for a full reaction. Second, when the liquid level of the sludge mixture in the first tank 7 rises to the first overflow hole 9 at the upper end of the first partition 6, the mixture flows into the second tank 8 through the first overflow hole 9, where it continues to be subjected to the electric field to complete the subsequent repair. Simultaneously, according to the repair progress, the delivery pump of the material tank 11 on one side of the treatment tank 3 is started to accurately deliver the electrolyte conditioner to the first tank 7 and the second tank 8 through corresponding pipelines, adjusting the electrochemical environment such as the pH value and ionic strength of the sludge mixture in the tank in real time to ensure repair efficiency.

[0043] Overflow treatment stage: If the liquid level of the sludge mixture in the second tank 8 is too high, the excess mixture will flow into the overflow collection tank 12 on the outside through the pipe connected to the upper end of the second tank 8; if it is necessary to adjust the electrochemical environment of the mixture in the overflow collection tank 12, the delivery pump of a certain material tank 11 can be started to deliver the electrolyte conditioner to the overflow collection tank 12.

[0044] Post-repair material storage stage: First, after the repair is completed in the treatment tank 3, open the valve on the bottom pipeline on one side of the treatment tank 3 and start the second pump 4 to transport the repaired sludge mixture in the treatment tank 3 to the first storage tank 5 for temporary storage; Second, after a certain amount of the repaired mixture is collected in the overflow collection tank 12, open the valve on its bottom pipeline and start the third pump 13 to transport the mixture to the second storage tank 14 for temporary storage, so as to carry out further processing such as dehydration and solid waste resource utilization.

[0045] Electrolyte conditioner replenishment stage: During the entire operation of the device, if the electrolyte conditioner in the material tank 11 is insufficient, the reserve conditioner in the electrolyte conditioner raw material tank will flow into each material tank 11 automatically or with slight power assistance through the feed pipe 15 and corresponding pipeline. The staff can monitor the replenishment status through the liquid level indicator or sensor to ensure a stable supply of conditioner.

[0046] 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.

[0047] 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.

[0048] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electric remediation device for heavy metal contaminated sludge, comprising a sludge tank (1), characterized in that: Clean water is injected into the sludge tank (1) for mixing. The first pump (2) transports the mixed sludge to the treatment tank (3). Multiple sets of electrodes are installed at the bottom of the treatment tank (3). After the electrodes are energized, they are used to electrically repair the sludge mixture. The bottom of one side of the treatment tank (3) is connected to the second pump (4) through pipes and valves. The second pump (4) is used to transport the repaired sludge mixture to the first storage tank (5).

2. The electrostatic remediation device for heavy metal contaminated sludge according to claim 1, characterized in that: The processing box (3) is equipped with a first partition (6) which is sealed to the sides and bottom of the processing box (3) in the middle, dividing the processing box (3) into a first box (7) and a second box (8). The upper end of the first partition (6) has a first overflow hole (9).

3. The electrostatic remediation device for heavy metal contaminated sludge according to claim 2, characterized in that: A baffle (10) is fixed inside the first box (7), and there is a gap between the baffle (10) and the bottom of the first box (7).

4. The electrostatic remediation device for heavy metal contaminated sludge according to any one of claims 1-3, characterized in that: Multiple sets of material tanks (11) are installed on one side of the processing box (3). Each material tank (11) contains an electrolyte conditioner. The material tank (11) is transported to the first box (7) and the second box (8) through a delivery pump and corresponding pipeline.

5. The electrostatic remediation device for heavy metal contaminated sludge according to claim 4, characterized in that: An overflow collection box (12) is placed on the outside of the second box (8). A certain material bucket (11) delivers electrolyte conditioner to the overflow collection box (12) through a delivery pump and corresponding pipeline. The bottom of the overflow collection box (12) is connected to the third pump (13) through pipeline and valve. The third pump (13) is used to deliver the repaired sludge mixture to the second storage box (14). The upper end of the second box (8) is connected to the overflow collection box (12) through a pipeline.

6. The electrostatic remediation device for heavy metal contaminated sludge according to claim 5, characterized in that: Each material tank (11) is connected to the feed pipe (15) through a pipeline, and the feed pipe (15) is connected to the electrolyte conditioner raw material tank.

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