Inorganic silica gel wastewater ultrafine particle electrophoresis recovery device

Abstract

The present application relates to the field of wastewater treatment, and particularly relates to an inorganic silica gel wastewater superfine particle electrophoresis recovery device, comprising a reaction tank, a regulating cylinder, a precipitation cylinder and a concentration cylinder are coaxially and positionally limited in the reaction tank from top to bottom, a water inlet pipe and a filling pipe are outwardly connected to the regulating cylinder, and an electrophoresis reactor is positionally limited in the precipitation cylinder; the inorganic silica gel wastewater is continuously processed from pH adjustment, electrophoresis settlement to concentration separation through the self-top-to-bottom sequential arrangement structure of the regulating cylinder, the precipitation cylinder and the concentration cylinder, the space integration degree of each functional unit is high, the fluid conveying path is short, the equipment floor area and the pipeline connection complexity are significantly reduced, and the overall processing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to an inorganic silica gel wastewater ultrafine particle electrophoretic recovery device. Background Technology

[0002] Wastewater generated during the production of inorganic silica gel contains a large number of silica gel particles. These particles are characterized by large specific surface area, high surface charge density, and strong colloidal stability, making them difficult to effectively separate and recover using conventional methods such as gravity sedimentation. Existing technologies mainly employ flocculation sedimentation and centrifugation to treat this type of wastewater, but both have significant drawbacks. Flocculation sedimentation requires the addition of large amounts of chemical flocculants, resulting in high operating costs. Furthermore, the introduced chemicals alter the surface properties of the silica gel particles, reducing the purity and reuse value of the recovered products. Centrifugation significantly reduces its efficiency for separating ultrafine particles smaller than 5 micrometers, consumes a lot of energy, and requires substantial equipment investment, making it difficult to meet the needs of continuous industrial processing.

[0003] With the development of technology, technicians in related fields have also made a lot of optimizations to the technical means of recycling and treating inorganic silica gel wastewater. In order to make a more accurate comparison, Chinese patent with publication number CN116675317A discloses a silica gel processing wastewater recycling and treatment equipment, including a sedimentation tank, a pressurizer, an inlet pipe, a collection tank, a filter membrane, and a cleaning system. When in use, the water droplets condensed on the upper part of the sedimentation tank are guided to the diversion channel through the arc-shaped upper part of the sedimentation tank. The water droplets are then collected into the collection box through the diversion channel, preventing pure water droplets from falling into the sewage and reducing the collection effect of pure water.

[0004] However, the above-mentioned technical methods still have some shortcomings in practical use: The above-mentioned technical solutions mainly rely on a combination of physical sedimentation and membrane filtration to treat silica gel wastewater. However, they have limited effectiveness in separating ultrafine silica gel particles with particle sizes ranging from nanometers to micrometers. Due to the significant Brownian motion of ultrafine particles and their extremely slow gravitational settling velocity, sedimentation tanks require a large floor area and a very long residence time to achieve the desired separation effect, resulting in low equipment efficiency. At the same time, the filter membrane is prone to pore blockage when filtering ultrafine particles, and the membrane flux decays rapidly, requiring frequent backwashing or chemical cleaning. This not only increases operating energy consumption but also leads to intermittent processing, making it difficult to meet the needs of continuous production.

[0005] Therefore, based on the above-mentioned viewpoints, there is still room for improvement in existing technologies for the recycling and treatment of inorganic silica gel wastewater. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an inorganic silica gel wastewater ultrafine particle electrophoretic recovery device, comprising a reaction tank. Within the reaction tank, a regulating cylinder, a sedimentation cylinder, and a concentrating cylinder are coaxially positioned from top to bottom. An inlet pipe and a filling pipe are connected outwards to the regulating cylinder. A first connecting pipe connects the regulating cylinder and the sedimentation cylinder. An electrophoretic reactor is positioned within the sedimentation cylinder. The electrophoretic reactor includes two electrode plates positioned within the sedimentation cylinder and electrically connected to the positive and negative terminals of an external power source, thereby forming an electrophoretic sedimentation zone between the two electrode plates within the sedimentation cylinder. An adjusting end is also provided at the sedimentation cylinder corresponding to the two electrode plates to drive the electrode plates to oscillate periodically and intermittently connect to the external power source. The concentrating cylinder is connected to the sedimentation cylinder to receive the recovered inorganic silica gel slurry and complete the concentration and separation.

[0007] Preferably, the adjustment end includes a connecting plate that connects the two electrode plates together, and an extension shaft that rotates through the sedimentation cylinder is limited in the middle of the connecting plate.

[0008] Preferably, a rotating gear is sleeved on the extended rotating shaft, and two incomplete gears are alternately meshed on both sides of the rotating gear. An adjusting rotating shaft on the sedimentation cylinder is fixed in the middle of the incomplete gear, and a driving rotating shaft that is axially spaced from the extended rotating shaft is axially spaced on the adjusting cylinder.

[0009] Preferably, the drive shaft extends into the regulating cylinder, and a stirring rack is sleeved on the drive shaft to facilitate rapid mixing of the inorganic silica wastewater to be treated with the pH adjuster in the regulating cylinder.

[0010] Preferably, a mounting block located between the drive shaft and the extension shaft is rotatably sleeved between the two adjustment shafts. An extension electrode extending towards the extension shaft is provided on the mounting block corresponding to the positive and negative poles of the external power supply. A contact electrode corresponding to the extension electrode is fixed on the extension shaft corresponding to the two electrode plates.

[0011] Preferably, the electrode plate is configured as an arc-shaped plate.

[0012] Preferably, the sedimentation cylinder is further provided with an annular uniform distribution pipe corresponding to the first connecting pipe, and a plurality of drainage holes are evenly opened on the annular uniform distribution pipe.

[0013] Preferably, the concentration cylinder and the sedimentation cylinder are connected by a second connecting pipe, and a filter cylinder is provided in the concentration cylinder corresponding to the second connecting pipe. The filter cylinder has a plurality of filter holes evenly opened circumferentially and axially.

[0014] Preferably, a limiting cylinder coaxially sleeved on the outside of the filter cylinder and connected to the concentration cylinder is provided. Several guide vanes are fixed circumferentially on the inner wall of the limiting cylinder and slide against the outer wall of the filter cylinder. A drain pipe that rotates through the concentration cylinder and the reaction tank is fixed at the bottom of the filter cylinder.

[0015] In summary, this application includes at least one of the following beneficial technical effects: I. This invention achieves a continuous treatment process for inorganic silica gel wastewater from pH adjustment, electrophoretic sedimentation to concentration and separation through a top-to-bottom arrangement of regulating cylinder, sedimentation cylinder and concentration cylinder. The high spatial integration of each functional unit and the short fluid transport path significantly reduce the equipment footprint and pipeline connection complexity, thereby improving the overall treatment efficiency.

[0016] II. This invention employs a synergistic approach of periodic, slow forward and reverse oscillation of the electrode plates and intermittent on / off switching of the electric field to create a dynamically optimized electrophoretic reaction environment within the sedimentation tank. The oscillating and rotating motion of the electrode plates continuously delivers the ultrafine silica gel solution to the area affected by the electric field layer on the electrode surface. Simultaneously, the periodic on / off switching of the electric field effectively avoids excessive polarization and passivation of the electrode surface, ensuring that the electrode maintains a high active surface area and a stable electric field strength. This significantly extends the continuous operation cycle of the electrode and improves the electrophoretic recovery efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the electrophoresis reactor of the present invention.

[0020] Figure 3 This is a cross-sectional structural diagram of the reaction vessel of the present invention.

[0021] Figure 4 This is the present invention. Figure 3 A magnified view of A in the middle.

[0022] Figure 5 This is a schematic diagram of the rotating gear of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the filter cartridge of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the guide blade of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the first connecting tube of the present invention.

[0026] Figure 9 This is a schematic diagram of the connecting slide bar structure of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure of the adjusting sleeve of the present invention.

[0028] In the diagram, 1. Reaction vessel; 10. Adjustment cylinder; 11. Sedimentation cylinder; 12. Concentration cylinder; 13. Water inlet pipe; 14. Filling pipe; 15. First connecting pipe; 2. Electrophoresis reactor; 20. Electrode plate; 21. Adjustment end; 210. Connecting lever; 211. Extension shaft; 212. Rotating gear; 213. Incomplete gear; 214. Adjustment shaft; 215. Drive shaft; 22. Stirring rack; 23. Mounting block; 230. Extension electrode; 231. Contact electrode; 24. Annular evenly distributed pipe; 3. Second connecting pipe; 30. Filter cylinder; 300. Filter hole; 31. Limiting cylinder; 32. Guide vane; 33. Sewage pipe; 4. Adjustment sleeve; 40. Spiral chute; 41. Driven guide rod; 42. Connecting guide rod; 43. Connecting slide rod; 44. Sealing block; 45. Sealing ball plug; 46. Connecting frame. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 10 The embodiments of the present invention will be described in detail below.

[0030] This application discloses an ultrafine particle electrophoretic recovery device for inorganic silica gel wastewater, which solves the problems of low efficiency and large space occupation in the treatment of inorganic silica gel wastewater in the prior art.

[0031] Example 1: Refer to Figures 1 to 3 As shown, an inorganic silica gel wastewater ultrafine particle electrophoretic recovery device includes a reaction tank 1. The reaction tank 1 contains a regulating cylinder 10, a sedimentation cylinder 11, and a concentration cylinder 12, all arranged in a concentric cylindrical structure from top to bottom. The regulating cylinder 10 is connected to an inlet pipe 13 and a filling pipe 14. A first connecting pipe 15 connects the regulating cylinder 10 and the sedimentation cylinder 11. An electrophoresis reactor 2 is contained within the sedimentation cylinder 11. 2 includes at least two electrode plates 20 installed and limited inside the sedimentation cylinder 11. The electrode plates 20 are electrically connected to an external power source and are respectively connected to the positive and negative terminals of the external power source, so that an electrophoretic sedimentation zone is formed inside the sedimentation cylinder 11 between the two electrode plates 20. An adjustment end 21 is also provided at the sedimentation cylinder 11 corresponding to the two electrode plates 20 to drive the electrode plates 20 to oscillate periodically and be intermittently connected to the external power source. The concentration cylinder 12 is connected to the sedimentation cylinder 11 to receive the recovered inorganic silica gel slurry and complete the concentration and separation.

[0032] The wastewater containing ultrafine inorganic silica gel particles to be treated enters the regulating cylinder 10 through the inlet pipe 13. A pH adjuster is then added to the regulating cylinder 10 through the injection pipe 14 to adjust the acidity and alkalinity of the wastewater to meet the conditions suitable for electrophoresis. After adjustment, the wastewater enters the sedimentation cylinder 11 through the first connecting pipe 15. An external power supply is activated to connect the two electrode plates 20, creating an electric field between them. Under the action of the electric field, the ultrafine silica gel particles in the wastewater migrate and accumulate towards the electrode plates 20 with opposite charges. At the same time, the regulating end 21 is activated to drive the wastewater in the sedimentation cylinder 11 to form a directional flow, improving the migration efficiency and collision aggregation probability of the particles, and promoting the rapid sedimentation and separation of ultrafine particles. The settled silica gel slurry flows downward into the concentration cylinder 12 for further solid-liquid separation, thereby achieving efficient recycling and treatment of inorganic silica gel wastewater.

[0033] Reference Figure 2 and Figure 3 As shown, the adjustment end 21 includes a connecting plate 210 that connects the two electrode plates 20 together. An extension shaft 211, which is rotatably inserted through the sedimentation cylinder 11, is limited in the middle of the connecting plate 210. During the rotation of the extension shaft 211, the connecting plate 210 and the two electrode plates 20 are also driven to rotate synchronously, which disturbs the wastewater in the sedimentation cylinder 11. This causes the rotational motion of the two electrode plates 20 in the sedimentation cylinder 11 to form a synergistic effect with the electric field, which can continuously transport the silica particles in the ultrafine inorganic silica solution to the electric layer influence area on the surface of the two electrode plates 20. At the same time, it significantly thins the diffusion boundary layer on the electrode surface, reduces the particle migration resistance, effectively increases the collision probability between particles and the anode and the metal ions dissolved from the anode, and quickly completes the charge neutralization and destabilization.

[0034] It should be noted that, in order to avoid excessive water disturbance caused by the excessive rotation speed of the electrode plate 20 in the sedimentation cylinder 11, which would affect the directional electrophoretic migration of silica particles, the extended rotating shaft 211, the connecting plate 210 and the two electrode plates 20 are all rotated slowly in the sedimentation cylinder 11. This avoids generating excessive turbulent shear force that could damage the already formed floc structure and ensures that the neutralized and destabilized silica particles can settle and separate smoothly.

[0035] Furthermore, referring to Figure 4 and Figure 5As shown, in order to improve the electrophoretic recovery effect and avoid electrode passivation or short circuit caused by excessive deposition of inorganic silica particles on the electrode plate 20 during the recovery process, a rotating gear 212 is sleeved on the extension shaft 211. Two incomplete gears 213 are alternately meshed on both sides of the rotating gear 212. An adjustment shaft 214 is fixed in the middle of the incomplete gear 213, which is rotated and limited between the adjustment cylinder 10 and the sedimentation cylinder 11. A drive shaft 215 is rotated and limited on the adjustment cylinder 10, which is axially spaced from the extension shaft 211. As an optional implementation, the two adjustment shafts 214 and the drive shaft 215 are connected by a synchronous belt drive. When the drive shaft 215 rotates, it synchronously drives the two adjusting shafts 214 and the incomplete gear 213 to rotate via the synchronous belt. This causes the two incomplete gears 213 to alternately mesh with the rotating gear 212. Under the alternating meshing action of the two incomplete gears 213, the rotating gear 212 generates periodic forward and reverse reciprocating rotation, which in turn drives the connecting plate 210 and the two electrode plates 20 to form an oscillating rotational motion in the sedimentation cylinder 11. This causes the fluid shear direction on the surface of the electrode plate 20 to change periodically, effectively peeling off the electrically neutralized and destabilized silica flocs on the electrode surface and preventing electrode passivation caused by excessive particle deposition.

[0036] Reference Figure 2 and Figure 3 As shown, the drive shaft 215 extends into the regulating cylinder 10, and a stirring rack 22 is fitted on the drive shaft 215 to facilitate rapid mixing of the inorganic silica wastewater to be treated with the pH adjuster in the regulating cylinder 10. In use, an external motor drives the drive shaft 215 and the stirring rack 22 to rotate within the regulating cylinder 10. The turbulent shearing effect generated by the stirring rack 22 during rotation ensures rapid and uniform mixing of the added pH adjuster and wastewater within the regulating cylinder 10, effectively shortening the acid-base neutralization reaction time and ensuring that the wastewater pH value quickly reaches the electrophoresis window.

[0037] Reference Figures 2 to 4 As shown, to achieve the reciprocating oscillation of the extension shaft 211, specifically, a mounting block 23 is rotatably mounted between the two adjusting shafts 214 and located between the driving shaft 215 and the extension shaft 211. The mounting block 23 has extension electrodes 230 extending towards the extension shaft 211, corresponding to the positive and negative terminals of the external power supply. Contact electrodes 231, corresponding to the extension electrodes 230, are fixed to the two electrode plates 20 on the extension shaft 211. During the periodic forward and reverse rotation of the extension shaft 211, the two contact electrodes 231 corresponding to the two electrode plates 20 are periodically pressed together and separated. When the two contact electrodes 231 contact the two extension electrodes 230 corresponding to the external power supply, a complete electrophoretic electric field circuit is formed within the external power supply, the extension electrodes 230, the contact electrodes 231, the electrode plates 20, and the sedimentation cylinder 11.

[0038] When the two contact electrodes 231 separate from the extension electrode 230, the electrophoresis circuit inside the precipitation cylinder 11 is interrupted, and the electrophoresis effect is temporarily stopped. By periodically switching on and off the electrophoresis mode, the electrode plate 20 intermittently releases electric field energy during the swinging and rotating process. This ensures the effective charge neutralization and directional migration of silica particles, while avoiding excessive polarization and passivation of the electrode surface caused by long-term continuous energization. This keeps the surface of the electrode plate 20 in a dynamic renewal state, effectively inhibiting the formation of a dense deposition layer of inorganic silica particles, maintaining the high active surface area and stable electric field strength of the electrode, thereby significantly improving the electrophoretic recovery efficiency and extending the continuous operation cycle of the electrode.

[0039] Reference Figure 2 and Figure 3 As shown, in order to ensure a uniform distribution of the electrophoretic electric field inside the sedimentation cylinder 11, the electrode plate 20 is configured as an arc-shaped plate structure coaxial with the central axis of the sedimentation cylinder 11. The arc of the electrode plate 20 extends circumferentially along the inner wall of the sedimentation cylinder 11 and is concentrically matched with the inner diameter of the sedimentation cylinder 11, so that the outer arc surface of the electrode plate 20 maintains a uniform gap with the inner wall of the sedimentation cylinder 11, while the inner arc surface faces the central region of the sedimentation cylinder 11 to form an open electrophoretic space. The two electrode plates 20 are symmetrically arranged on opposite sides of the cross-section of the sedimentation cylinder 11 and are distributed along the axial direction on the upper and lower inner walls of the sedimentation cylinder 11 at intervals, ensuring that the electric field has sufficient coverage in both the axial and radial directions, while ensuring the uniform sedimentation of inorganic silica particles inside the sedimentation cylinder 11.

[0040] Reference Figure 2 and Figure 3 As shown, an annular uniform distribution pipe 24 is also provided inside the sedimentation cylinder 11 corresponding to the first connecting pipe 15, and several drainage holes are evenly opened on the annular uniform distribution pipe 24. When the ultrafine particle inorganic silica wastewater regulated in the regulating cylinder 10 enters the uniform distribution pipe through the first connecting pipe 15, it will naturally flow along the annular path of the annular uniform distribution pipe 24, forming a uniform distribution state under the action of gravity. Then, it is injected into the bottom area of ​​the sedimentation cylinder 11 in a multi-point dispersion manner through the drainage holes arranged on the annular uniform distribution pipe 24, effectively avoiding the local high flow velocity and flow turbulence caused by single-point direct water inflow.

[0041] Reference Figure 6 and Figure 7 As shown, a second connecting pipe 3 is connected between the concentration cylinder 12 and the sedimentation cylinder 11. A filter cylinder 30 is rotatably limited inside the concentration cylinder 12 corresponding to the second connecting pipe 3. The filter cylinder 30 has a plurality of filter holes 300 evenly opened circumferentially and axially. A limiting cylinder 31 connected to the concentration cylinder 12 is coaxially sleeved on the outside of the filter cylinder 30. A plurality of guide blades 32 are fixed circumferentially on the inner wall of the limiting cylinder 31 and slide against the outer wall of the filter cylinder 30. A drain pipe 33 is fixed at the bottom of the filter cylinder 30 and rotates out of the concentration cylinder 12 and the reaction tank 1. A drive gear is sleeved on the drain pipe 33.

[0042] After electrophoretic sedimentation is completed in the sedimentation tank 11, the silica gel slurry enters the filter cylinder 30 in the concentration tank 12 through the second connecting pipe 3. First, an external drive device rotates the drive gear, causing the drain pipe 33 and the filter cylinder 30 to rotate around their central axis. Under the centrifugal force generated by the rotation of the filter cylinder 30, the water in the silica gel slurry is further thrown towards the inner wall of the filter cylinder 30, allowing it to pass through the filter holes 300 into the annular chamber between the filter cylinder 30 and the limiting cylinder 31, and flow into the concentration tank 12. The trapped concentrated particles converge downwards along the inner wall of the filter cylinder 30 and are periodically discharged and collected through the drain pipe 33, achieving efficient concentration and recovery of inorganic silica gel particles and complete liquid-solid separation. During rotation, the outer wall of the filter cylinder 30 maintains sliding contact with the guide vanes 32. The guide vanes 32, on the one hand, provide radial limiting for the filter cylinder 30, ensuring its rotational stability; on the other hand, they provide a continuous scraping and cleaning effect on the outer wall of the filter cylinder 30, preventing the accumulation and blockage of ultrafine inorganic silica gel particles on the outside of the filter holes 300.

[0043] Furthermore, to improve the recycling effect of inorganic silica gel wastewater, the concentration tank 12 and the regulating tank 10 are connected by a combination of a reflux pump and a reflux pipe, so that the clear liquid filtered out in the concentration tank 12 can be returned to the regulating tank 10 for electrophoretic sedimentation treatment again, forming a closed-loop recycling cycle.

[0044] Example 2: Refer to Figures 8 to 10 As shown, based on Embodiment 1, an adjusting sleeve 4 is coaxially sleeved on the outer side of the extending rotating shaft 211. A spiral groove 40 is opened on the extending rotating shaft 211. A driven guide rod 41 is provided on the adjusting sleeve 4 and is slidably inserted into the spiral groove 40. A connecting guide rod 42 connected to the annular uniformly distributed pipe 24 is provided on the adjusting sleeve 4. The first connecting pipe 15 is a telescopic pipe structure. The fixed section of the first connecting pipe 15 is rotatably inserted on the adjusting cylinder 10, and its free section is slidably inserted on the sedimentation cylinder 11. A connecting slide rod 43 is limited in both the fixed section and the free section of the first connecting pipe 15. A sealing block 44 is fixedly connected in the fixed section of the first connecting pipe 15. One end of the connecting slide rod 43 is fixedly connected to the free section of the first connecting pipe 15, and the other end slides out of the sealing block 44 and is connected to a sealing ball plug 45 that matches the sealing block 44. In use, as the two adjusting shafts 214 drive the two incomplete gears 213 to rotate relative to each other, the rotating gear 212 and the extension shaft 211 rotate synchronously. Since the driven guide rod 41 is slidably embedded in the spiral groove 40, the rotational motion of the extension shaft 211 is converted into the linear reciprocating motion of the adjusting sleeve 4 along the axial direction of the extension shaft 211 through the cooperation of the spiral groove 40 and the driven guide rod 41, which drives the annular uniform distribution tube 24 to rise and fall synchronously.

[0045] Simultaneously, the connecting slide rod 43 rises and falls synchronously with the annular distribution pipe 24, and the sealing ball plug 45 slides relative to the sealing block 44. When the annular distribution pipe 24 moves upward, the sealing ball plug 45 separates from the sealing block 44 to form a communication gap, allowing the pH-adjusted ultrafine particle inorganic silica wastewater in the regulating cylinder 10 to enter the annular distribution pipe 24 through this communication gap. When the annular distribution pipe 24 moves downward, the sealing ball plug 45 re-presses against the sealing block 44, cutting off the fluid passage in the first connecting pipe 15. By intermittently opening and closing the first connecting pipe 15, dynamic coordination between wastewater injection and distribution position is achieved, ensuring the periodic renewal of the water inlet area at the bottom of the sedimentation cylinder 11 while avoiding local siltation problems caused by continuous water inlet.

[0046] Furthermore, a sealing block 44, a connecting slide rod 43, and a sealing ball plug 45 are also installed in the second connecting pipe 3. The connecting slide rod 43 and the sealing ball plug 45 in the second connecting pipe 3 are installed in opposite directions to the connecting slide rod 43 and the sealing ball plug 45 in the first connecting pipe 15. The connecting slide rod 43 in the second connecting pipe 3 is connected to the annular uniformly distributed pipe 24 through a connecting frame 46. When the annular distribution pipe 24 moves upward, the connecting slide rod 43 and the sealing ball plug 45 in the first connecting pipe 15 and the second connecting pipe 3 move upward simultaneously. The sealing ball plug 45 in the first connecting pipe 15 opens while the sealing ball plug 45 in the second connecting pipe 3 closes, and the wastewater in the regulating cylinder 10 flows unidirectionally into the annular distribution pipe 24. When the annular distribution pipe 24 moves downward, the sealing ball plug 45 in the first connecting pipe 15 closes while the sealing ball plug 45 in the second connecting pipe 3 opens, and the wastewater in the sedimentation cylinder 11 can enter the concentration cylinder 12 through the second connecting pipe 3, realizing the coordinated cooperation of water inlet and water outlet in the sedimentation cylinder 11, forming a periodic fluid replacement cycle.

[0047] As an optional implementation, the two adjusting shafts 214 are also configured to be telescopic in relation to the first connecting pipe 15, and are connected to the adjusting cylinder 10 and the annular evenly distributed pipe 24 through the middle. The adjusting shafts 214 are also equipped with a sealing block 44, a connecting slide rod 43 and a sealing ball plug 45 corresponding to the first connecting pipe 15.

[0048] Example 3: Refer to Figures 3 to 5 As shown, based on Embodiment 1 and Embodiment 2, in order to further improve the electrophoretic recovery effect, specifically, several extension electrodes 230 are uniformly arranged circumferentially around the drive shaft 215. The polarity of each extension electrode 230 is alternately distributed along the drive shaft 215 to form a multi-polar alternating electric field structure. When the extension shaft 211 drives the two contact electrodes 231 to rotate periodically, each extension electrode 230 sequentially forms an electrical connection with the two contact electrodes 231, so that the polarity of the contact electrodes 231 is periodically reversed with rotation.

[0049] When the contact electrode 231 rotates to connect with the positive electrode extension 230, the contact electrode 231 and the electrode plate 20 become positively charged, generating electrostatic adsorption on the negatively charged ultrafine silica particles in the wastewater. When it continues to rotate to connect with the negative electrode extension 230, the contact electrode 231 and the electrode plate 20 become negatively charged. The previously adsorbed silica particles are desorbed due to the repulsion of like charges and are thrown outward under the action of centrifugal force. Through the design of the alternating polarity of the electrode plate 20, a single electrode plate 20 completes the complete cycle of adsorption, desorption and particle ejection in sequence within the rotation cycle. This causes the ultrafine silica particles to oscillate and migrate under the action of the alternating electric field, effectively inhibiting the dense deposition of particles at a single electrode plate 20 and promoting the uniform dispersion and directional electrophoresis of particles in the wastewater.

[0050] During operation: First, the ultrafine inorganic silica gel wastewater to be treated is sent into the regulating cylinder 10 through the inlet pipe 13, and at the same time, pH adjuster is added into the cylinder through the injection pipe 14; the drive shaft 215 drives the stirring frame 22 to rotate synchronously, and the regulator and wastewater are quickly and evenly mixed through turbulent shearing action, and the acid-base neutralization reaction is completed quickly, and the pH value of the wastewater is accurately adjusted to the electrophoresis reaction window, so as to prepare for subsequent electrophoretic sedimentation.

[0051] Step 2: The regulating end 21 drives the electrode plate 20 to periodically and slowly swing forward and backward in the sedimentation cylinder 11. At the same time, the intermittent switching of the electrode power guides the ultrafine silica particles in the wastewater to migrate in the electric field, neutralize and destabilize and settle, while preventing electrode passivation.

[0052] Step 3: The settled silica gel slurry enters the concentration cylinder 12, where it is concentrated and separated under centrifugal force, achieving efficient recycling of ultrafine inorganic silica gel particles.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An inorganic silica gel wastewater ultrafine particle electrophoretic recovery device, comprising a reaction vessel (1), characterized in that: The reaction tank (1) is coaxially limited from top to bottom by an regulating cylinder (10), a sedimentation cylinder (11) and a concentration cylinder (12). The regulating cylinder (10) is connected to an inlet pipe (13) and a filling pipe (14). The regulating cylinder (10) and the sedimentation cylinder (11) are connected by a first connecting pipe (15). The sedimentation cylinder (11) is limited by an electrophoresis reactor (2). The electrophoresis reactor (2) includes two electrode plates (20) that are limited in the sedimentation cylinder (11) and electrically connected to the positive and negative poles of an external power supply, so that an electrophoretic sedimentation zone is formed in the sedimentation cylinder (11) between the two electrode plates (20). The sedimentation cylinder (11) is also provided with an regulating end (21) corresponding to the two electrode plates (20) to drive the electrode plates (20) to swing periodically and be intermittently connected to the external power supply. The concentration cylinder (12) is connected to the sedimentation cylinder (11) to receive the recovered inorganic silica gel slurry and complete the concentration and separation.

2. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 1, characterized in that: The adjustment end (21) includes a connecting plate (210) that connects the two electrode plates (20) together, and an extension shaft (211) that is rotatably inserted through the sedimentation cylinder (11) is limited in the middle of the connecting plate (210).

3. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 2, characterized in that: A rotating gear (212) is sleeved on the extended rotating shaft (211). Two incomplete gears (213) are alternately meshed on both sides of the rotating gear (212). An adjusting shaft (214) on the rotating limiting sedimentation cylinder (11) is fixed in the middle of the incomplete gear (213). A driving shaft (215) that is axially spaced from the extended rotating shaft (211) is axially spaced on the adjusting cylinder (10).

4. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 3, characterized in that: The drive shaft (215) extends into the regulating cylinder (10), and a stirring rack (22) is sleeved on the drive shaft (215) to facilitate rapid mixing of the inorganic silica wastewater to be treated and the pH adjuster in the regulating cylinder (10).

5. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 3, characterized in that: The two adjustment shafts (214) are rotatably fitted together with a mounting block (23) located between the drive shaft (215) and the extension shaft (211). The mounting block (23) is provided with an extension electrode (230) extending towards the extension shaft (211) corresponding to the positive and negative poles of the external power supply. The extension shaft (211) is fixed with a contact electrode (231) corresponding to the extension electrode (230) on the two electrode plates (20).

6. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 1, characterized in that: The electrode plate (20) is an arc-shaped plate structure.

7. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 1, characterized in that: The sedimentation cylinder (11) is also provided with an annular uniform distribution pipe (24) corresponding to the first connecting pipe (15), and a number of drainage holes are evenly opened on the annular uniform distribution pipe (24).

8. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 1, characterized in that: The concentration cylinder (12) and the sedimentation cylinder (11) are connected by a second connecting pipe (3). A filter cylinder (30) is provided in the concentration cylinder (12) corresponding to the second connecting pipe (3). The filter cylinder (30) has a number of filter holes (300) evenly opened in the circumferential and axial directions.

9. The inorganic silica gel wastewater ultrafine particle electrophoretic recovery device according to claim 8, characterized in that: The filter cylinder (30) is coaxially sleeved with a limiting cylinder (31) connected to the concentrator (12). The inner wall of the limiting cylinder (31) is fixed with several guide vanes (32) that slide against the outer wall of the filter cylinder (30). The bottom of the filter cylinder (30) is fixed with a drain pipe (33) that rotates through the concentrator (12) and the reaction vessel (1).

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