Recyclable electro-osmosis combined vacuum preloading drainage device

Abstract

The utility model provides a recoverable electro-osmosis combined vacuum preloading drainage device. The recoverable electro-osmosis combined vacuum preloading drainage device comprises a fixing assembly and a telescopic body which are sequentially arranged from top to bottom. The telescopic body comprises a frame and a drainage plate connected with the frame in a sliding mode, the drainage plate comprises a first surface layer, a second surface layer and a supporting structure arranged between the first surface layer and the second surface layer, a plurality of drainage channels are formed between the supporting structure and the inner layer and between the supporting structure and the outer layer, and drainage pipes are arranged in the drainage channels; the fixing assembly comprises a cover plate and a plurality of anchor rods arranged on the lower surface of the cover plate, and the cover plate is connected with the frame. The drainage device disclosed by the utility model has a telescopic function and can synchronously stretch and retract along with the change of the elevation of a soil body, so that the damage to a vacuum film is avoided; through the innovative design of the recoverable drainage device, the drainage device can be conveniently recovered after sludge dewatering or soft foundation treatment, so that effective recovery and resource utilization of heavy metal ions are realized, and environmental pollution and treatment cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of sludge dehydration and sludge treatment, in particular to a recyclable electroosmosis combined vacuum pre-pressure drainage device. Background Art

[0002] In traditional geotechnical engineering practice, sludge dewatering and soft foundation reinforcement are common technical challenges. As an effective means of soil improvement, electroosmosis technology promotes the migration of water in the soil by applying electric field force, thereby accelerating the dewatering process of sludge and the consolidation of soft foundation. However, as the reinforcement process progresses, the elevation of the soil surface gradually decreases. Due to its excessive rigidity, traditional electroosmosis drainage boards can easily penetrate the overlying vacuum membrane, resulting in a decrease in vacuum degree, which in turn affects the dewatering efficiency and reinforcement effect.

[0003] In addition, during the electrodynamic remediation process, heavy metal ions will be adsorbed to the cathode area. If the electroosmotic drainage board cannot be removed, these heavy metal ions will remain in the treated sludge and soil, requiring additional secondary treatment to achieve resource utilization, which not only increases the treatment cost, but may also cause secondary pollution to the environment.

[0004] In addition, the drainage boards in the prior art have the following technical problems: (1) The problem of excessive rigidity of the electro-osmotic drainage board: In traditional electro-osmotic technology, the rigid drainage board can easily pierce the overlying vacuum membrane during the soil reinforcement process, resulting in a decrease in the vacuum degree, which in turn affects the sludge dewatering efficiency and the soft foundation reinforcement effect. (2) The problem of difficulty in recovering heavy metal ions: During the electrodynamic remediation process, heavy metal ions will be adsorbed to the cathode area. If the electro-osmotic drainage board cannot be removed, these heavy metal ions will remain in the treated sludge and soil, requiring additional secondary treatment. (3) Improvement of construction efficiency and safety: The installation and recovery process of traditional electro-osmotic drainage boards is complicated and time-consuming, and there are certain safety risks. (4) Reduction of environmental risks and treatment costs: In traditional technology, since heavy metal ions are difficult to recover, secondary treatment is often required, and wastewater will also be generated during the secondary treatment process, which not only increases the treatment cost, but may also cause secondary pollution to the environment.

[0005] Therefore, the development of a drainage device that can recycle heavy metal ions and a method for quickly dehydrating sludge while purifying sludge and discharging water is of great significance to the promotion of in-situ sludge dehydration technology and the sustainable development of the environment. Utility Model Content

[0006] In view of this, the utility model aims to overcome the defects in the prior art and proposes a recyclable electro-osmosis combined vacuum preloading drainage device. The drainage device of the utility model can be synchronously extended and retracted when the soil elevation drops to avoid piercing the vacuum membrane. At the same time, the design of the device allows the drainage board to be recycled after the treatment process is completed, thereby achieving effective recovery of heavy metal ions, reducing environmental pollution and treatment costs, and improving the recycling rate of resources. The drainage device of the utility model is of great significance to the fields of geosynthetics and environmental engineering technology, and provides a more efficient and environmentally friendly solution for related projects.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A recyclable electro-osmosis combined vacuum preloading drainage device, the drainage device includes a fixed component and a telescopic body arranged in sequence from top to bottom; the telescopic body includes a frame and a drainage plate slidably connected to the frame, the drainage plate includes a first surface layer, a second surface layer and a supporting structure arranged between the first surface layer and the second surface layer, the supporting structure forms a plurality of drainage channels with the inner layer and the outer layer respectively, and a drainage pipe is arranged in the drainage channel; the fixed component includes a cover plate and a plurality of anchor rods arranged on the lower surface of the cover plate, and the cover plate is connected to the frame.

[0009] Furthermore, the first surface layer and the second surface layer of the drainage board are made of stainless steel fiber spunlace cloth.

[0010] Furthermore, the equivalent pore size of the first surface layer and the second surface layer is 0.075 mm.

[0011] Furthermore, a catalyst layer is provided on the inner surface of the first surface layer and / or the inner surface of the second surface layer.

[0012] Furthermore, the inner surfaces of the first surface layer and the second surface layer are both provided with an adhesive layer, and the catalyst layer is bonded to the surface of the adhesive layer.

[0013] Furthermore, copper wires are arranged in the drainage channels at the left and right ends of the drainage plate, and the copper wires are electrically connected to a DC power supply.

[0014] Furthermore, the frame is adapted to the drain board, and a through hole for the drain board to pass through is provided at the bottom thereof, and a slide groove matching with the drain board is provided on the inner side wall.

[0015] Furthermore, the frame is provided with hoops and reinforcing ribs from top to bottom.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] (1) The drainage device of the utility model has a telescopic function and can be expanded and contracted synchronously with the change of soil elevation, thereby avoiding damage to the vacuum membrane.

[0018] (2) The utility model adopts an innovative design of a recyclable drainage device, so that after sludge dehydration or soft base treatment, the drainage device can be easily recycled, thereby achieving effective recovery and resource utilization of heavy metal ions, reducing environmental pollution and treatment costs, and embodying both environmental and economic benefits.

[0019] (3) The utility model adopts EKG material (stainless steel fiber spunlace cloth) to replace traditional plastic materials. During the working process, the heavy metal ions in the bottom mud are converted into hydrated heavy metal ions through the action of electric power and catalyst. The hydrated heavy metal ions and organic pollutants enter the drainage board during the drainage process. In the drainage board, the catalyst layer degrades and effectively adsorbs organic pollutants and heavy metals.

[0020] (4) The utility model not only improves the efficiency and effect of sludge dewatering and soft foundation reinforcement projects, but also contributes to environmental protection and sustainable utilization of resources, and has important practical value and social benefits.

[0021] (5) The application of the drainage device provided by the utility model can improve the construction process, and can simplify the installation and recycling process by using a plug-in machine and recycling equipment, thereby improving construction efficiency and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of the drainage mechanism described in the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the drainage board described in the utility model;

[0024] Figure 3 A three-dimensional diagram of the frame of the utility model;

[0025] Figure 4 It is a three-dimensional diagram of the drainage board described in the utility model.

[0026] Description of reference numerals:

[0027] 100. Cover plate; 101. Anchor rod; 102. Frame; 103. Drain board; 104. Copper wire; 105. Drain pipe; 106. Through hole; 107. Slide groove; 108. Hoop; 109. Reinforcement rib; 110. Drain channel; 111. Support structure; 112. Stainless steel fiber spunlace cloth. DETAILED DESCRIPTION

[0028] Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The test reagents used in the following examples are all conventional biochemical reagents unless otherwise specified; the experimental methods are all conventional methods unless otherwise specified.

[0029] The utility model is described in detail below in conjunction with the embodiments.

[0030] The utility model provides a Figure 1-Figure 4 The recyclable electroosmosis combined vacuum preloading drainage device shown in the figure comprises a fixed assembly and a telescopic body arranged in sequence from top to bottom, and the telescopic body comprises a frame 102 and a drainage plate 103 slidably connected to the frame 102. The fixed assembly comprises a cover plate 100 and a plurality of anchor rods 101 arranged on the lower surface of the cover plate 100. When in use, the anchor rods 101 are inserted into the bottom mud in the bottom mud treatment tank, and the cover plate 100 is connected to the frame 102 so that the cover plate 100 and the frame 102 move synchronously.

[0031] The drain board 103 includes a first surface layer, a second surface layer, and a support structure 111 disposed between the first surface layer and the second surface layer. The first surface layer and the second surface layer of the drain board 103 are made of stainless steel fiber spunlace cloth 112, and the bottom and sides of the drain board 103 are sealed. The first surface layer and the second surface layer have excellent corrosion resistance and strength, and can resist chemical substances and mechanical wear in the soil. At the same time, the stainless steel fiber spunlace cloth 112 has good electrical conductivity and can form an effective current channel during the electroosmosis process to promote the migration of water and heavy metal ions in the soil. The support structure 111 is a rigid support structure made of high-strength composite materials to provide sufficient bending and compression resistance.

[0032] In order to ensure water permeability and conductivity, and prevent sand from penetrating, as a preferred implementation scheme, the equivalent aperture of the first surface layer and the second surface layer is designed to be 0.075mm. This aperture design can not only ensure the rapid passage of water, but also effectively prevent the penetration of granular materials such as mud and sand, ensuring the unobstructed drainage system.

[0033] The drainage board 103 of the utility model is innovative in the outer covering material, and adopts stainless steel fiber spunlace cloth, which is not only water permeable, but also can conduct electricity quickly in a short time, thereby improving the electroosmosis efficiency. In a preferred embodiment of the utility model, the first surface layer and the second surface layer can also be treated with anti-corrosion on the basis of the above, and the internal drainage board 103 can be tested for strength to ensure that it can withstand the soil pressure.

[0034] In addition, a catalyst layer is adhered to the inner surface of the first surface layer and / or the inner surface of the second surface layer. In a specific embodiment of the utility model, the catalyst layer is a mixture of TiO2 photocatalyst and montmorillonite, and the mass ratio of TiO2 photocatalyst to montmorillonite in the mixture of TiO2 photocatalyst and montmorillonite is 2:1 to 1:2. The TiO2 photocatalyst degrades organic pollutants through electrocatalysis, and the montmorillonite adsorbs heavy metal pollutants in the drainage board, thereby completing the purification of bottom mud and sewage during the dehydration process.

[0035] The inner surfaces of the first surface layer and the second surface layer are both provided with an adhesive layer, and the catalyst layer is bonded to the surface of the adhesive layer. Specifically, the catalyst layer is provided on the inner surface of the first surface layer and the second surface layer by the following method: glue dots are evenly provided on the inner surface of the stainless steel fiber spunlace cloth 212, and a mixture of TiO2 photocatalyst and montmorillonite is evenly sprinkled on the inner surface of the stainless steel fiber spunlace cloth 112, and the glue dots are left to solidify, and after the TiO2 montmorillonite material on the glue dots surface is firmly bonded, the excess TiO2 photocatalyst and montmorillonite mixture can be removed by vibration. In a specific embodiment of the utility model, glue dots are pasted on the inner surface of the stainless steel spunlace fiber cloth every 3 cm horizontally and every 5 cm vertically, the glue dots have a diameter of 5 mm, and the standing time is 1 hour.

[0036] The support structure 111 forms several drainage channels 110 with the inner layer and the outer layer respectively. A drainage pipe 105 is inserted into the drainage channel 110. The bottom of the drainage pipe 105 is inserted into the upper part of the drainage channel 110. The top of the drainage pipe 105 is connected to a flexible water pipe and communicated with the water vapor separation tank. Copper wires 104 are arranged in the drainage channels 110 at the left and right ends of the drainage board 103. The copper wires 104 are electrically connected to a DC power supply. Copper wires 104 are added on both sides of the drainage board 103 to increase the conductivity and structural stability of the drainage board 103. The drainage pipe 105 is connected to facilitate the collection and removal of moisture in the soil. The copper wire 104 is connected to a flexible electric wire, and the top of the drainage pipe 105 is connected to a flexible water pipe to adapt to the uneven settlement and deformation of the soil body and ensure the continuous operation of the drainage system.

[0037] In a preferred embodiment of the present invention, the copper wire 104 and the drain pipe 105 are insulated to prevent accidental leakage during construction. In an embodiment of the present invention, to ensure a firm connection, the copper wire 104 is spot welded using a dedicated welding device, and the connection of the drain pipe 105 is made with a quick connector to facilitate subsequent disassembly and recycling. During the installation process, the spacing and position of the drain plate 103 are accurately measured to ensure drainage efficiency.

[0038] In a preferred embodiment of the present invention, the frame 102 and the support structure 111 are made of high-strength plastic materials to provide sufficient rigidity. The drain pipe 105 is made of polyethylene material, the distance between the copper wires 104 on both sides is set to 50mm, the diameter is 1mm, and the inner diameter of the drain pipe 105 is 2-3mm to ensure good drainage performance.

[0039] In a preferred embodiment of the present invention, the frame 102 is adapted to the drain board 103, and a through hole 106 is provided at the bottom thereof for the drain board 103 to pass through, and a slide groove 107 is provided on the inner wall for the drain board 103 to slide up and down, so as to prevent the drain board 203 from slipping off during the insertion and removal process.

[0040] In a preferred embodiment of the present invention, a hoop 108 and a reinforcing rib 109 are provided on the frame 102, and the spacing between the hoop 108 and the reinforcing rib 109 is 100 mm. These hoops 108 and reinforcing ribs 109 are arranged in a uniformly distributed manner to ensure that the frame 102 has a consistent rigidity in the entire length direction, prevent uneven lateral deformation or fracture under complex soil conditions, and thus ensure the stability and durability of the device.

[0041] The drainage board 103 and the frame 102 in the utility model work together to ensure synchronous expansion and contraction when the soil elevation drops, avoiding damage to the overlying vacuum membrane; the copper wire 104 and the water pipe 7 are made of flexible materials to adapt to soil deformation and maintain drainage continuity and efficiency; the bottom of the drainage board 103 is sealed to prevent mud and water from flowing back, ensuring the functional integrity of the drainage board 103.

[0042] On the other hand, the utility model also provides a method for installing the above-mentioned recyclable electroosmosis combined vacuum preloading drainage device, which specifically includes the following steps:

[0043] S1: Before installation, first conduct a site survey to evaluate soil conditions, determine the layout of the drainage board, and prepare the necessary construction equipment and materials. Including but not limited to the board plugging machine, power equipment, telescopic body, anchor rods, cover plates, etc. Ensure that the board plugging machine and power equipment are in good working condition, and pay special attention to the hydraulic system and control system of the board plugging machine to ensure construction safety.

[0044] S2: Connect the copper wire on the drain board to the DC power supply to form a current loop during the electroosmosis process. The copper wire 104 is fixed to both sides of the drain board 103 by welding, and the drain pipe 105 is connected to the top of the drain board 103 by hot melting technology. Ensure that all connection points are well sealed and there is no leakage. During the wiring process, ensure that all connections are firm and reliable, and perform necessary insulation treatment to prevent short circuit or leakage.

[0045] S3: Mark the planned location to ensure the correct placement of the drain board. Use measuring tools to make precise measurements and make adjustments based on design requirements to ensure even distribution and optimal effect of the drain board.

[0046] S4: Use the plate inserter to insert the telescopic body into the soil along the marked position to the specified depth. During the insertion process, monitor the working status of the plate inserter, adjust the hydraulic pressure and insertion speed, and ensure that the drainage board enters the soil smoothly and evenly.

[0047] According to the soil conditions and engineering requirements, the specified depth is 3-5m to improve construction efficiency and safety. In one embodiment of the utility model, the working pressure of the plate inserter is set to 1.5MPa and the insertion speed is 20mm / s to ensure that the drain board can enter the soil evenly and stably. The insertion depth of the drain board is set according to the soil conditions and engineering requirements, generally 70% of the soil thickness. In another embodiment of the utility model, according to the actual situation of the soil, the working parameters of the plate inserter are adjusted, such as the hydraulic pressure is adjusted to 2MPa, and the insertion speed is controlled at 25mm / s. At the same time, the deformation of the soil is monitored to ensure the uniform distribution of the drain board and the stability of the soil.

[0048] S5: After the telescopic body is inserted into the soil, the cover plate is connected to the top of the frame. The cover plate protects the upper part of the drain plate, prevents soil and debris from entering, and maintains the vacuum state around the drain plate. The telescopic body is connected to the cover plate through anchor rods, and the anchor rods are locked to fix the position of the drain plate. The anchor rods must have sufficient strength and stability to resist the pressure and deformation of the soil.

[0049] S6: After completing the installation of the drain board, confirm that all drain boards have been installed correctly, start the power supply, and start the electroosmosis operation. By applying a DC electric field, the water and heavy metal ions in the soil are promoted to migrate to the drain board, accelerating the sludge dehydration and soil consolidation.

[0050] In the implementation process of the utility model, the voltage is set to 20V-25V and the current density is 50A / m 2 -60A / m 2 , lasting for 12-14 days, to promote water migration in the soil and adsorption of heavy metal ions. In addition, the electroosmosis parameters can be adjusted and optimized according to the conductivity and water content of the soil. At the same time, the temperature and pH value of the soil are monitored to ensure the stability and safety of the electroosmosis process.

[0051] S7: During the entire installation process, real-time monitoring is carried out to record key data such as the location of the drainage board and electroosmosis parameters to complete the installation process. If an abnormal situation occurs, the construction parameters should be adjusted immediately or corresponding measures should be taken. Subsequent construction or monitoring work will then be carried out to ensure the stable operation of the entire system.

[0052] S8: Recover the drainage device and remove the drainage board for post-processing, repair and reuse. After electroosmosis, the water in the soil is effectively discharged and the sludge volume is significantly reduced. After the sludge dehydration or soft foundation treatment is completed, the stability of the soil and the state of the telescopic body are first evaluated, and then the telescopic body together with the drainage board is removed from the soil through recycling equipment, such as a robotic arm with a grabbing function. During this process, the robotic arm must be precisely controlled to avoid damage to the soil structure. The recovered drainage board is then sent to the heavy metal ion recovery system, which separates and recovers heavy metal ions to achieve resource reuse.

[0053] The following effects can be achieved by using the recyclable electroosmosis combined with vacuum preloading drainage device of the utility model for sludge dewatering: (1) the sludge dewatering efficiency is increased to 30%-35%, which significantly improves the project progress; (2) the heavy metal ion recovery rate is increased to 90%-95%, which effectively reduces the impact on the environment; (3) the construction cost is reduced by 20%-25%, while improving the safety and reliability of the construction.

[0054] The telescopic structure of the utility model can adapt to changes in soil elevation. Through the synergistic effect of internal rigid support and external stainless steel fiber mesh woven layer, it can achieve synchronous expansion and contraction without piercing the overlying vacuum membrane. This is the key to ensuring the normal operation of the device and improving engineering efficiency. The innovative recyclable drainage device design allows the drainage device and its adsorbed heavy metal ions to be removed from the soil through recycling equipment after sludge dehydration or soft foundation treatment, achieving the dual goals of environmental protection treatment and resource recovery. The construction efficiency and safety are improved by improving the installation method, while reducing environmental risks and treatment costs, bringing innovative construction solutions to the field of geotechnical engineering.

[0055] The drainage device of the utility model significantly reduces environmental pollution and treatment costs in the process of sludge treatment and soil improvement through efficient drainage and effective recovery of heavy metal ions. The design of the system of the utility model fully considers the sustainability and economy of the project, and provides a brand-new solution for soil treatment. The drainage device of the utility model has good adaptability and reliability. Whether in soft soil foundation reinforcement or in sludge dewatering treatment, the device can provide stable drainage effect and heavy metal ion recovery efficiency. The design of the drainage device of the utility model takes into account the special requirements of different engineering environments, such as the pH value, water content, particle size, etc. of the soil, ensuring efficient operation and long-term stability under various complex conditions.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A recyclable electroosmotic combined vacuum preloading drainage device, characterized in that: The drainage device includes a fixed component and a telescopic body arranged in sequence from top to bottom; the telescopic body includes a frame and a drainage plate slidably connected to the frame, the drainage plate includes a first surface layer, a second surface layer and a supporting structure arranged between the first surface layer and the second surface layer, the supporting structure forms a plurality of drainage channels with the inner layer and the outer layer respectively, and a drainage pipe is arranged in the drainage channel; the fixed component includes a cover plate and a plurality of anchor rods arranged on the lower surface of the cover plate, and the cover plate is connected to the frame.

2. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 1 is characterized in that: The first surface layer and the second surface layer of the drainage board are made of stainless steel fiber spunlace cloth.

3. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 2 is characterized in that: The equivalent pore size of the first surface layer and the second surface layer is 0.075 mm.

4. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 1 is characterized in that: The inner surface of the first surface layer and / or the inner surface of the second surface layer are both provided with a catalyst layer.

5. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 4 is characterized in that: The inner surfaces of the first surface layer and the second surface layer are both provided with an adhesive layer, and the catalyst layer is bonded to the surface of the adhesive layer.

6. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 1 is characterized in that: Copper wires are arranged in the drainage channels at the left and right ends of the drainage plate, and the copper wires are electrically connected to a DC power supply.

7. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 1 is characterized in that: The frame is adapted to the drain board, and a through hole for the drain board to pass through is arranged at the bottom thereof, and a sliding groove matched with the drain board is arranged on the inner side wall.

8. The recyclable electroosmotic combined vacuum preloading drainage device according to claim 1 is characterized in that: The frame is provided with hoops and reinforcing ribs from top to bottom.

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