A multi-stage treatment apparatus for silicon-containing wastewater

Abstract

A multi-stage treatment device for silicon-containing wastewater includes a flocculation tank. An inlet pipe is fixedly connected to the bottom of the side wall of the flocculation tank. A top cover is fitted onto the flocculation tank, and a motor is fixedly connected to the top cover. A driving end of the motor is fixedly connected to a mating shaft, which is rotatably connected to the top cover. A stirring chamber shaft is fixedly connected to the lower end of the mating shaft. Multiple sets of rotating rods are rotatably connected to the outer wall of the stirring chamber shaft. A stirring blade is fixedly connected to the end of each rotating rod away from the stirring chamber shaft. A driving assembly is arranged between the multiple rotating rods. A turbidity sensor is also installed inside the flocculation tank. A mating cover is fixedly connected to the bottom of the stirring chamber shaft, and a piston is slidably connected inside the stirring chamber shaft. The piston is mated to the driving assembly, which drives the stirring blades to rotate while simultaneously raising and lowering the piston. This invention has the advantage of adapting to the differentiated stirring requirements of different flocculation stages.

Description

Technical Field

[0001] This invention relates to the field of silicon-containing wastewater treatment technology, and in particular to a multi-stage treatment device for silicon-containing wastewater. Background Technology

[0002] The production of silica gel generates a large amount of silica-containing wastewater. This type of wastewater contains pollutants such as suspended silica gel particles, colloidal silica, and unreacted raw material debris. The concentration of suspended solids is high. Direct discharge will cause environmental pollution. If it is recycled, the flocculation effect needs to be precisely controlled to ensure that the effluent quality meets the standards.

[0003] The wastewater treatment process revolves around the core principle of "raw water pretreatment → deep purification → solid-liquid separation → reuse / compliant discharge." Targeting complex pollutants such as fine silica powder, colloidal silica, and soluble silicates, it employs four core stages to progressively improve water quality and ultimately achieve compliance. The raw water pretreatment stage removes most solid pollutants and initially flocculants from the raw water, homogenizing the water quality, stabilizing the influent concentration, and reducing the treatment load on subsequent stages. The deep purification stage receives the pretreated effluent, first converting soluble silicates into calcium silicate precipitate through a calcium salt precipitation reaction, then neutralizing and adjusting the pH to 6-9, and finally using ultrafiltration to remove residual colloids and fine particles. The solid-liquid separation stage collects the sludge (fine silica powder, calcium silicate precipitate, etc.) generated in each stage, increases the sludge concentration to 15%-20% through gravity concentration, and then dewaters it to a moisture content of 60%-80% using a plate and frame filter press. The dewatered sludge can be reused as building material, avoiding secondary pollution and forming a closed-loop treatment process. Reuse / Compliance Discharge Stage: Optimize water quality at the terminal based on effluent demand to ensure compliance with discharge standards or meet production reuse standards, thereby achieving efficient utilization of water resources.

[0004] In the raw water pretreatment stage, coagulation and stirring are used to add destabilizing agents, flocculants (e.g., PAC agents), and coagulant aids (e.g., PAM agents). The design of the stirring components directly affects the flocculation efficiency and floc quality. Currently, most common stirring blades have a fixed angle structure, which cannot adapt to the differentiated stirring requirements of different stages of the flocculation reaction.

[0005] Therefore, in view of the above situation, there is an urgent need to develop a multi-stage treatment device for silicon-containing wastewater to overcome the shortcomings in current practical applications. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-stage treatment device for silicon-containing wastewater, which aims to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A multi-stage treatment device for silicon-containing wastewater includes a flocculation tank. An inlet pipe is fixedly connected to the bottom of the side wall of the flocculation tank, and a dosing pipe is connected to the inlet pipe. A discharge pipe is fixedly connected to the bottom of the flocculation tank. An outlet is provided on the side wall of the flocculation tank. A buffer tank is also fixedly connected to the outer wall of the flocculation tank, and a discharge pipe is fixedly connected to the buffer tank. A top cover is fitted onto the flocculation tank. A motor is fixedly connected to the top cover. A matching shaft is fixedly connected to the drive end of the motor, and the matching shaft is rotatably connected to the top cover. A stirring shaft is fixedly connected to the lower end of the matching shaft. Multiple sets of rotating rods are rotatably connected to the outer wall of the stirring shaft. A stirring blade is fixedly connected to the end of each rotating rod away from the stirring shaft. A drive assembly is arranged between the multiple rotating rods. A turbidity sensor is also installed inside the flocculation tank. A matching cover is fixedly connected to the bottom end of the stirring chamber shaft. A piston is also slidably connected inside the stirring chamber shaft. The piston is connected to the drive assembly, and the drive assembly drives the stirring blade to rotate while driving the piston to rise and fall.

[0008] A further technical solution is provided in which a filter screen cylinder is slidably disposed inside the liquid outlet, and an oscillation component is disposed on the filter screen cylinder. An adjustment component for adjusting the oscillation amplitude and oscillation frequency of the filter screen cylinder is also disposed between the oscillation component and the driving component. A scraper is also disposed on the adjustment component.

[0009] A further technical solution includes a second motor, a drive shaft, a drive cylinder, a groove, a rack, a second gear, a limiting rod, and a limiting groove. The second motor is fixedly connected to the top end of the stirring chamber shaft, and the drive end of the second motor is fixedly connected to the drive shaft. The drive cylinder is slidably connected to the inner wall of the stirring chamber shaft, and a limiting rod is fixedly connected to the outer wall of the drive cylinder. A limiting groove is formed in the inner wall of the stirring chamber shaft, and the limiting rod is slidably connected to the inner wall of the limiting groove. The side wall of the drive cylinder also has circumferentially evenly distributed grooves, and racks are fixedly connected to the inner walls of each groove. Multiple racks are evenly distributed circumferentially about the drive cylinder. One end of the rotating rod located inside the stirring chamber shaft is fixedly connected to a second gear, which meshes with the rack.

[0010] A further technical solution includes a fixed disk, an oscillation groove, a contact rod, a slide rod, and a spring; the end of the filter screen cylinder away from the shaft of the stirring chamber is fixedly connected to the slide rod, and the slide rod is slidably connected to the buffer box; the outer wall of the slide rod is also fitted with a spring; the outer wall of the filter screen cylinder near the shaft of the stirring chamber is fixedly connected to the contact rod; the outer wall of the stirring chamber shaft is fixedly connected to the fixed disk; the outer wall of the fixed disk has multiple evenly distributed oscillation grooves; and the lower end of the fixed disk is fixedly connected to the scraper.

[0011] A further technical solution includes an adjustment component comprising an embedding groove, an adjustment disk, an adjustment slot, a receiving slot, a first gear, a first gear pair, and a connecting rod; the fixed disk has an embedding groove, the inner wall of the embedding groove is rotatably connected to the adjustment disk, the outer wall of the adjustment disk has multiple sets of adjustment slots corresponding to the oscillation slot, the adjustment disk has a receiving slot, the first gear is fixedly connected in the receiving slot, the outer wall of the stirring chamber shaft is rotatably connected to the connecting rod, a first gear pair is provided between the connecting rod and the drive shaft, and the other end of the connecting rod is fixedly connected to a third gear, the third gear meshing with the first gear.

[0012] In a further technical solution, the difference between the outer wall radius of the adjusting disc and the inner wall radius of the adjusting groove is greater than the difference between the outer wall radius of the adjusting disc and the outer wall radius of the fixed disc.

[0013] A further technical solution is provided in which a second placement groove is provided at the bottom of the embedded groove but does not penetrate the fixed plate, and a metal part is fixedly installed in the second placement groove. A first placement groove is provided on the adjustment plate, and an electromagnet is fixedly installed in the first placement groove. The inner wall of the first placement groove is provided with an insulating layer.

[0014] In a further technical solution, a filter screen is also provided at the bottom of the inner end of the mating cover.

[0015] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: 1. During the destabilization stage, the stirring blade angle is adjusted to the range of 45° to 60° to enhance the swirling disturbance of the water, accelerate the neutralization of colloidal silicon charge by the destabilizing agent, and allow colloidal particles to be quickly adsorbed onto the seed crystal surface, thus shortening the destabilization cycle. During the floc growth stage, the stirring blade angle is adjusted to the range of 15° to 30° to weaken the shear force, prevent floc breakage, and promote the aggregation of basic flocs into large flocs, thereby achieving precise matching between stirring intensity and flocculation stage, and thus adapting to the differentiated stirring requirements of different flocculation stages. 2. The piston is driven upward by the drive component to extract and temporarily store the precipitate crystals at the bottom of the flocculation tank. When the turbidity sensor detects that the floc concentration is too low, the piston is driven downward by the drive component to release some of the precipitate crystals. The angle between the stirring blades and the horizontal plane is increased to enhance the stirring intensity and water disturbance effect, promote the thorough mixing of the reagents, wastewater, and crystals, and accelerate the formation and aggregation of basic flocs. When the turbidity sensor detects that the floc concentration in the flocculation tank is too high, the piston is driven upward by the drive component to extract some of the precipitate crystals. The angle of the stirring blades is then reduced to weaken the stirring shear force and avoid the breakage of large flocs caused by high-intensity stirring.

[0016] 3. The rotation of the stirring chamber shaft drives the oscillation component to move, which in turn drives the filter screen cylinder to reciprocate along the inner wall of the outlet. This causes the flocs embedded in the mesh of the filter screen cylinder to fall off, breaking the "stubborn blockage". At the same time, the vibration can change the flow direction and velocity distribution of wastewater through the mesh, reducing the concentrated deposition of flocs in specific areas. The adjustment component adjusts the oscillation amplitude and frequency of the filter screen cylinder driven by the oscillation component according to the lifting and lowering state of the piston driven by the drive component, thereby adapting to the differences in floc state.

[0017] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Another perspective of the three-dimensional structure diagram; Figure 3 For the present invention Figure 1 A partial sectional view of the middle section of the structure; Figure 4 This is an exploded view of a portion of the structure in this invention; Figure 5 This is a cross-sectional three-dimensional structural diagram of a portion of the flocculation tank of the present invention. Figure 6 This is a three-dimensional structural diagram of the interior of the stirring chamber shaft in this invention; Figure 7 This is an exploded view of the oscillation component and the adjustment component in this invention. Figure 8 This is a three-dimensional cross-sectional view of the stirring chamber shaft in this invention; Figure 9 For the present invention Figure 5 Enlarged 3D structural diagram at point A Figure 10 This is a bottom-view perspective view of the fixed disk portion of the present invention.

[0019] In the diagram: 1. Flocculation tank; 2. Top cover; 3. Inlet pipe; 4. Multi-port adapter; 5. Motor 1; 6. Stirring shaft; 7. Stirring blade; 8. Outlet; 9. Filter screen; 10. Buffer tank; 11. Drain pipe; 12. Vibration assembly; 121. Fixed plate; 122. Vibration tank; 123. Abutment rod; 124. Slide rod; 125. Spring; 13. Adjustment assembly; 131. Embedded groove; 132. Adjustment plate; 133. Adjustment groove; 134. Receiving groove; 135. Gear 1; 136. Gear pair one; 137. Connecting rod; 14. Mating cover; 15. Rotating rod; 16. Drive assembly; 161. Motor two; 162. Drive shaft; 163. Drive cylinder; 164. Groove; 165. Rack; 166. Gear two; 167. Limiting rod; 168. Limiting groove; 17. Piston; 18. Chamfer; 19. Scraper; 20. Discharge pipe; 21. Dosing pipe; 22. Mating shaft; 23. Metal parts; 24. Electromagnet; 25. Placement slot one; 26. Placement slot two. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0022] like Figures 1-10As shown in the figure, this embodiment of the invention provides a multi-stage treatment device for silicon-containing wastewater, including a raw water pretreatment unit, a deep purification unit, a solid-liquid separation unit, and a reuse / compliant discharge unit. The raw water pretreatment unit includes a flocculation tank 1, with an inlet pipe 3 fixedly connected to the bottom of the side wall of the flocculation tank 1. A dosing pipe 21 is fixedly connected to the side of the inlet pipe 3 near the flocculation tank 1. A multi-port adapter 4 is threaded onto the dosing pipe 21, and the multi-port adapter 4 is connected to different reagent storage devices through an external hose. A discharge pipe 20 is fixedly connected to the bottom of the flocculation tank 1, and an outlet 8 is provided on the side wall of the flocculation tank 1. A buffer tank 10 is also fixedly connected to the outer wall of the flocculation tank 1, and a buffer tank 10 is fixedly connected to the buffer tank 10. The flocculation tank 1 has a drain pipe 11. A top cover 2 is connected to the flocculation tank 1. A motor 5 is fixedly connected to the top cover 2. A matching shaft 22 is fixedly connected to the drive end of the motor 5. The matching shaft 22 is rotatably connected to the top cover 2. A stirring chamber shaft 6 is fixedly connected to the lower end of the matching shaft 22. Multiple sets of rotating rods 15 are rotatably connected to the outer wall of the stirring chamber shaft 6. A stirring blade 7 is fixedly connected to the end of each rotating rod 15 away from the stirring chamber shaft 6. A drive assembly 16 is arranged between the multiple rotating rods 15. The stirring blade 7 is driven to rotate by the cooperation of the drive assembly 16 and the rotating rods 15. The flocculation tank 1 is also equipped with a turbidity sensor (not shown in the figure) and a liquid level measuring device (not shown in the figure) for monitoring the height of wastewater.

[0023] It is understood that the deep purification unit, solid-liquid separation unit, and reuse / compliant emission unit all employ existing technologies and will not be described in detail here.

[0024] Specifically, wastewater enters the flocculation tank 1 through the inlet pipe 3, while the destabilizing agent is injected into the inlet pipe 3 through the multi-port adapter 4 and the dosing pipe 21. The destabilizing agent then enters the flocculation tank 1 along with the wastewater, forming a swirling flow. Motor 5 drives the mating shaft 22 to rotate, which in turn drives the stirring chamber shaft 6 to rotate. The stirring chamber shaft 6 drives multiple stirring blades 7 to rotate around its axis, stirring the wastewater in the flocculation tank 1. The stirring blades 7 are at an angle of 45°–60° to the horizontal, which enhances the turbulence. The destabilizing agent quickly neutralizes the colloidal silica charge, and the colloidal particles are rapidly adsorbed. After achieving sufficient stabilization on the seed crystal surface, the stabilizing agent channel is closed, and then the flocculant injection channel is opened for injection. The angle between the stirring blade 7 and the horizontal direction is adjusted to within the range of 15° to 30°. Under gentle stirring, the basic flocs aggregate and grow with the seed crystal as the core. Then, the flocculant injection channel is closed, and then the coagulant aid channel is opened to inject the coagulant aid. The stirring blade 7 is kept at the angle between the stirring blade 7 and the horizontal direction (15° to 30°) to promote the dense growth of flocs and avoid floc breakage due to excessive stirring intensity. This allows the angle of the stirring blade 7 to be adjusted to adapt to different stages. In addition, the floc concentration in flocculation tank 1 is detected by a turbidity sensor. When the floc concentration is high (turbidity close to or exceeding 800 NTU, corresponding to excessive floc aggregation), the angle of the stirring blade 7 is further reduced within the corresponding range (for example, from 30° to 15° within the range of 15° to 30°) to further weaken the stirring shear force and avoid the breakage of large flocs due to high-intensity stirring. At the same time, the discharge pipe 20 is opened as needed to transport the material at the bottom of flocculation tank 1 to the next process (solid-liquid separation unit). When the floc concentration is too low (turbidity below 500 NTU, corresponding to fewer flocs), the angle of the stirring blade 7 is increased within the corresponding range (for example, from 15° to 30° within the range of 15° to 30°) to increase the stirring intensity and water disturbance effect, promote the full mixing of reagents, wastewater, and seed crystals, accelerate the formation and aggregation of basic flocs, and ensure that the floc concentration returns to the appropriate range.

[0025] It is understood that the inlet pipe 3, outlet pipe 11, discharge pipe 20, dosing pipe 21 and hose are all equipped with solenoid valves for controlling the opening and closing of the channels; Seed crystals are substances that act as the "core carrier" for the aggregation of colloidal particles and fine flocs during flocculation. They can accelerate floc growth, improve floc density and strength, and optimize solid-liquid separation. The seed crystals in flocculation tank 1 mainly come from two sources: first, the fine silica gel particles and unreacted raw material debris inherent in the silica-containing wastewater; second, the fine sludge particles released from the bottom sediment via piston 17 and then suspended by bottom stirring blades 7 (these sludge particles can be temporarily stored in the chamber between the stirring shaft 6 and the matching cover 14 via piston 17, and released as needed). If a batch of wastewater has a low content of fine particles, relying solely on its own fine silica gel particles and unreacted raw material debris as seed crystals will result in insufficient aggregation carriers for colloidal particles, prolonging the flocculation reaction cycle and affecting overall treatment efficiency. The fine particles released from the bottom sediment can serve as auxiliary seed crystals, replenished by the lifting and lowering of piston 17. The treatment of silicon-containing wastewater must meet the recycling standard of effluent SS (suspended solids) ≤30mg / L. Fine flocs cannot settle effectively, resulting in excessive SS in the effluent. That is, the fine particles formed after the flocs are broken are difficult to settle and will be discharged with the effluent, causing the suspended solids content in the water to exceed the set standard, which cannot meet the requirements for production reuse or discharge.

[0026] Destabilization stage: Increasing the angle between the stirring blade 7 and the horizontal plane (45°~60°) can enhance the disturbance. After the colloidal silicon is neutralized by the destabilizing agent, it will be quickly adsorbed on the surface of the seed crystal to form fine basic flocs and shorten the flocculation reaction time. Floc growth stage: Adjust the angle between the stirring blade 7 and the horizontal plane to a smaller angle (15°~30°). The basic flocs, with the seed crystals as the core, continue to aggregate under the action of the main flocculant and coagulant aid, forming dense and high-strength large flocs, avoiding the problem of flocs being easily broken, and ensuring the separation efficiency of the subsequent filter press.

[0027] like Figure 3 , Figure 5 and Figure 8 As shown, a mating cover 14 is fixedly connected to the bottom end of the stirring chamber shaft 6. A chamfer 18 is provided at the top of the inner wall of the mating cover 14. A piston 17 is also slidably connected inside the stirring chamber shaft 6. The piston 17 is mated and connected to the drive assembly 16. The drive assembly 16 drives the stirring blade 7 to rotate while driving the piston 17 to rise and fall.

[0028] Specifically, during the injection of flocculant and coagulant aid into the inlet pipe 3, the flocs are in the growth stage. At this time, the angle between the stirring blade 7 and the horizontal plane needs to be reduced to the range of 15° to 30°. The drive assembly 16 drives the rotating rod 15 to rotate (the rotating rod 15 rotates more than one revolution; here, the angle of the stirring blade 7 before adjustment is set as A, and the angle after adjustment is set as B, to meet the requirements). The actual rotation angle of the rotating rod 15 is n represents the number of rotations of the rotating rod 15 (n is a positive integer), which ultimately reduces the angle between the stirring blade 7 and the horizontal plane to the range of 15° to 30°. During this process, the drive assembly 16 synchronously drives the piston 17 to rise, thereby enabling the precipitate seed crystals at the bottom of the flocculation tank 1 to be temporarily stored between the inner wall of the stirring chamber shaft 6 and the mating cover 14. When the turbidity sensor detects that the floc concentration is too low, the piston 17 is lowered by the drive assembly 16, thereby releasing some of the precipitate seeds and ensuring that the angle between the stirring blade 7 and the horizontal plane is increased (the rotation angle of the rotating rod 15 is more than one revolution; assuming that the angle of the stirring blade before adjustment is A and the angle after adjustment is B, this satisfies the following conditions). The actual rotation angle of the rotating rod 15 is n represents the number of rotations of the rotating rod 15 (n is a positive integer), which enhances the stirring intensity and water disturbance effect, promotes the full mixing of the reagent with wastewater and seed crystals, and accelerates the formation and aggregation of basic flocs; When the turbidity sensor detects that the floc concentration in flocculation tank 1 is too high, the piston 17 is driven upward by the drive assembly 16 to extract some of the precipitate seed crystals, and the angle of the stirring blade 7 is reduced (the rotation angle of the rotating rod 15 exceeds one revolution; here, the angle of the stirring blade 7 before adjustment is set as A, and the angle after adjustment is set as B, to meet the requirements). The actual rotation angle of the rotating rod 15 is (n represents the number of rotations of the rotating rod 15, where n is a positive integer), weakening the stirring shear force and avoiding the breakage of large flocs caused by high-intensity stirring; In addition, the precipitate seed crystals temporarily stored between the inner wall of the stirring chamber shaft 6 and the mating cover 14 can be directly released when treating the next batch of wastewater, thereby increasing the number of seed crystals in the initial stage and promoting floc formation.

[0029] like Figure 3 , Figure 4 and Figure 7 As shown, a filter cylinder 9 is slidably disposed inside the liquid outlet 8, and an oscillation component 12 is disposed on the filter cylinder 9. An adjustment component 13 for adjusting the oscillation amplitude and oscillation frequency is also disposed between the oscillation component 12 and the drive component 16. A scraper 19 is also disposed on the adjustment component 13.

[0030] Specifically, the filter cylinder 9 intercepts flocculent matter within the flocculation tank 1, thereby preventing large-volume flocculent matter from entering the buffer tank 10 with the wastewater, and thus preventing large-volume flocculent matter from entering the deep purification unit. The scraper 19 is used to scrape off the waste material intercepted on the surface of the filter cylinder 9 near the stirring chamber shaft 6. The waste material intercepted on the outer wall of the filter cylinder 9 is scraped off by the inner wall of the outlet 8 near the stirring chamber shaft 6 while sliding back and forth along the inner wall of the outlet 8. As the stirring chamber shaft 6 rotates, it drives the oscillation component 12 to move. The oscillation component 12 drives the filter cylinder 9 to move back and forth along the inner wall of the outlet 8, thereby causing the flocculent matter embedded in the mesh of the filter cylinder 9 to fall off, breaking the "stubborn blockage". At the same time, the vibration can change the flow direction and velocity distribution of the wastewater flowing through the mesh, reducing the concentrated deposition of flocculent matter in specific areas. The adjustment component 13 adjusts the oscillation amplitude and oscillation frequency of the oscillation component 12 driving the filter cylinder 9 according to the lifting and lowering state of the piston 17 driven by the drive component 16, thereby adapting to the differences in flocculent matter state. When the drive assembly 16 drives the piston 17 to rise (at this time the concentration in the flocculation tank 1 is too high), the piston 17 extracts the sediment at the bottom of the flocculation tank 1 for temporary storage. The drive assembly 16, in cooperation with the adjustment assembly 13, increases the oscillation amplitude and frequency of the oscillation assembly 12 driving the filter cylinder 9, thereby quickly removing the clogging flocs embedded in the mesh through stronger oscillation amplitude and frequency, achieving efficient desorption. When the drive assembly 16 drives the piston 17 to descend (at this time the concentration in the flocculation tank 1 is too low), the piston 17 extracts the sediment at the bottom of the flocculation tank 1 for temporary storage. The drive assembly 16, in cooperation with the adjustment assembly 13, reduces the oscillation amplitude and oscillation frequency of the oscillation assembly 12 driving the filter cylinder 9, so as to prevent the flocs from adhering by only slight vibration, and at the same time avoid the vibration impact that makes it difficult for small flocs to aggregate.

[0031] like Figure 5 , Figure 6 , Figure 8 and Figure 9As shown, the drive assembly 16 includes a second motor 161, a drive shaft 162, a drive cylinder 163, a groove 164, a rack 165, a second gear 166, a limiting rod 167, and a limiting groove 168; the second motor 161 is fixedly connected to the top end of the stirring chamber shaft 6, the drive end of the second motor 161 is fixedly connected to the drive shaft 162, the drive cylinder 163 is slidably connected to the inner wall of the stirring chamber shaft 6, and the limiting rod 167 is fixedly connected to the outer wall of the drive cylinder 163. A limiting groove 168 is formed on the inner wall of the shaft 6, and the limiting rod 167 is slidably connected to the inner wall of the limiting groove 168. The side wall of the drive cylinder 163 is also provided with circumferentially evenly distributed grooves 164. Each groove 164 is fixedly connected to a rack 165, and multiple racks 165 are evenly distributed circumferentially about the drive cylinder 163. One end of the rotating rod 15 located in the stirring chamber shaft 6 is fixedly connected to a gear 166, and the gear 166 meshes with the rack 165.

[0032] Specifically, the limiting rod 167 and the limiting groove 168 are used to restrict the drive cylinder 163 to slide and rise only along the inner wall of the stirring chamber shaft 6. When the drive cylinder 163 is controlled to rise, the drive end of the second motor 161 drives the drive shaft 162 to rotate, and then the drive shaft 162 drives the drive cylinder 163 to rise. After that, the drive cylinder 163 drives the rack 165 to rise, and the rack 165 drives the second gear 166 to rotate clockwise (see reference). Figure 8 Gear 166 drives the rotating rod 15 to rotate clockwise, and the rotating rod 15 drives the stirring blade 7 to rotate clockwise around the axis of the rotating rod 15. When the rotating rod 15 rotates more than one revolution, the angle between the stirring blade 7 and the horizontal plane can be adjusted to increase or decrease. At the same time, the drive cylinder 163 synchronously drives the piston 17 to rise. The rising piston 17 draws the sediment at the bottom of the flocculation tank 1 into the stirring chamber shaft 6 for temporary storage. When the drive cylinder 163 descends, the drive end of motor 161 drives the drive shaft 162 to rotate. Then, the drive shaft 162 drives the drive cylinder 163 to descend. After that, the drive cylinder 163 drives the rack 165 to descend, and the rack 165 drives the gear 166 to rotate counterclockwise (see reference). Figure 8 Gear 166 drives the rotating rod 15 to rotate counterclockwise, and the rotating rod 15 drives the stirring blade 7 to rotate counterclockwise around the axis of the rotating rod 15. After the rotating rod 15 rotates more than one revolution, the angle between the stirring blade 7 and the horizontal plane can be adjusted to increase or decrease. At the same time, the drive cylinder 163 synchronously drives the piston 17 to descend. The piston 17 releases the sediment at the bottom of the flocculation tank 1 into the flocculation tank 1. Then, under the stirring of the stirring blade 7, the concentration of flocs in the flocculation tank 1 can be increased, promoting the growth and aggregation of flocs.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the oscillation assembly 12 includes a fixed disk 121, an oscillation groove 122, an abutment rod 123, a slide rod 124, and a spring 125; the end of the filter screen cylinder 9 away from the stirring chamber shaft 6 is fixedly connected to the slide rod 124, and the slide rod 124 is slidably connected to the buffer box 10. The outer wall of the slide rod 124 is also sleeved with a spring 125. The outer wall of the filter screen cylinder 9 near the stirring chamber shaft 6 is fixedly connected to the abutment rod 123. The outer wall of the stirring chamber shaft 6 is fixedly connected to the fixed disk 121. The outer wall of the fixed disk 121 has multiple evenly distributed oscillation grooves 122, and the lower end of the fixed disk 121 is fixedly connected to the scraper 19.

[0034] Specifically, the spring 125 always applies an elastic force to the filter cylinder 9, bringing it closer to the axis of the stirring chamber shaft 6. The drive end of the motor 5 drives the stirring chamber shaft 6 to rotate via the mating shaft 22. The stirring chamber shaft 6 drives the fixed disk 121 to rotate, causing the outer wall of the fixed disk 121 and the inner wall of the oscillation groove 122 to alternately abut against the abutment rod 123. This drives the abutment rod 123 to reciprocate relative to the axis of the stirring chamber shaft 6. Then, the abutment rod 123 drives the filter cylinder 9 to reciprocate along the inner wall of the outlet 8, causing the filter cylinder 9 to oscillate. This causes the flocs embedded in the mesh holes of the filter cylinder 9 to fall off. At the same time, it can change the flow direction and velocity distribution of wastewater flowing through the mesh holes, reducing the concentrated deposition of flocs in specific areas. In addition, the fixed disk 121 synchronously drives the scraper 19 to rotate around the axis of the stirring chamber shaft 6, thereby cleaning the waste intercepted on the surface of the filter cylinder 9.

[0035] like Figures 3-5 and Figure 7 As shown, the adjustment assembly 13 includes an embedding groove 131, an adjustment disk 132, an adjustment groove 133, a receiving groove 134, a gear 135, a gear pair 136, and a connecting rod 137. The fixed disk 121 has an embedding groove 131, and the inner wall of the embedding groove 131 is rotatably connected to the adjustment disk 132. The outer wall of the adjustment disk 132 has multiple sets of adjustment grooves 133 corresponding to the oscillation groove 122. The adjustment disk 132 has a receiving groove 134, and the gear 135 is fixedly connected in the receiving groove 134. The outer wall of the stirring chamber shaft 6 is rotatably connected to the connecting rod 137. A gear pair 136 is provided between the connecting rod 137 and the drive shaft 162. The other end of the connecting rod 137 is fixedly connected to a gear 3 (not marked in the figure), and the gear 3 meshes with the gear 135.

[0036] Furthermore, the difference between the outer radius of the adjusting disc 132 and the inner radius of the adjusting groove 133 is greater than the difference between the outer radius of the adjusting disc 132 and the outer radius of the fixed disc 121. This results in a greater distance that the abutment rod 123 can move when the adjusting groove 133 is located in the oscillation groove 122 position, that is, a greater amplitude of the reciprocating movement of the filter cylinder 9 driven by the abutment rod 123.

[0037] Specifically, the drive end of the control motor 161 drives the drive shaft 162 to rotate. Then, the drive shaft 162 drives the drive cylinder 163 to rise, and the drive cylinder 163 drives the piston 17 to rise. The drive shaft 162 synchronously drives the connecting rod 137 to rotate via gear pair 136. Then, the connecting rod 137 drives gear 135 to rotate via gear 3. Gear 135 drives the adjusting disc 132 to rotate on the inner wall of the embedded groove 131. Then, the adjusting disc 132 drives the adjusting groove 133 to gradually move to the position of the oscillation groove 122. When the adjusting groove 133 rotates to the position of the abutment rod 123, the distance that the abutment rod 123 can move increases, that is, the abutment rod 123 drives the filter cylinder 9 to reciprocate with greater amplitude, thereby achieving stronger vibration. The oscillation amplitude and frequency quickly remove the clogging flocs embedded in the mesh, achieving efficient desorption; when the drive shaft 162 drives the drive cylinder 163 to descend, the drive cylinder 163 drives the piston 17 to descend, and the drive shaft 162 drives the connecting rod 137 to rotate synchronously through the gear pair 136. Then the connecting rod 137 drives the gear 135 to rotate through the gear 3. The gear 135 drives the adjusting plate 132 to rotate on the inner wall of the embedding groove 131. Then the adjusting plate 132 drives the adjusting groove 133 to gradually move away from the position of the oscillation groove 122. When the adjusting groove 133 rotates to be blocked by the inner wall of the embedding groove 131, the distance that the abutment rod 123 can move becomes smaller, that is, the reciprocating movement amplitude and vibration frequency of the filter cylinder 9 driven by the abutment rod 123 become smaller. In addition, when one part of the adjustment groove 133 is located in the oscillation groove 122 and the other part of the adjustment groove 133 is blocked by the inner wall of the embedded groove 131, the amplitude of the reciprocating movement of the filter cylinder 9 driven by the abutment rod 123 is the difference between the outer radius of the adjustment plate 132 and the inner radius of the adjustment groove 133 (that is, the same as the amplitude when the adjustment groove 133 rotates to the position of the abutment rod 123). The vibration frequency is less than the vibration frequency when the adjustment groove 133 rotates to the position of the abutment rod 123. Thus, the reciprocating movement amplitude and frequency of the filter cylinder 9 can be adjusted synchronously according to the degree of lifting and lowering of the piston 17 driven by the drive shaft 162 through the drive cylinder 163.

[0038] like Figure 2 , Figure 3 and Figure 5 As shown, a filter screen (not shown in the figure) is also provided at the bottom of the inner end of the mating cover 14. The filter screen allows qualified fine particles (as effective seed crystals) to remain and intercepts large particle impurities. A chamfer 18 is provided at the top of the inner end of the mating cover 14. The chamfer 18 effectively reduces the accumulation of sediment on the mating cover 14 and facilitates discharge. An observation window (not marked in the figure) is provided on the top cover 2. The observation window facilitates observation of the state inside the flocculation tank 1.

[0039] like Figure 3 , Figure 4 and Figure 7As shown, a second placement slot 26 that does not penetrate the fixing plate 121 is provided at the bottom of the embedded slot 131. A metal part 23 is fixedly installed in the second placement slot 26. A first placement slot 25 is provided on the adjusting plate 132. An electromagnet 24 is fixedly installed in the first placement slot 25, and an insulating layer is provided on the inner wall of the first placement slot 25, thereby achieving insulation isolation between the electromagnet 24 and the inner wall of the first placement slot 25.

[0040] When it is necessary to drive the adjusting disk 132 to rotate, first de-energize the electromagnet 24, so that the electromagnet 24 and the metal part 23 are released from adsorption constraint and can move relative to each other. At this time, the adjusting disk 132 can be driven to rotate along the inner wall of the embedded groove 131. When it is necessary to keep the adjusting disk 132 stationary relative to the inner wall of the embedded groove 131 (i.e., when the drive shaft of motor 2 161 stops outputting power), energize the electromagnet 24, so that the electromagnet 24 and the metal part 23 are attracted and fixed and remain relatively stationary. This makes the adjusting disk 132 and the fixed disk 121 form a relatively stationary locked state, which effectively prevents the adjusting disk 132 from shaking relative to the inner wall of the embedded groove 131 during the rotation of the fixed disk 121 around the stirring chamber shaft 6, and effectively ensures that the amplitude and frequency of the reciprocating movement of the filter screen cylinder 9 remain stable.

[0041] The working principle of this invention is as follows: Wastewater enters the flocculation tank 1 through the inlet pipe 3, while the destabilizing agent is injected into the inlet pipe 3 through the multi-port adapter 4 and the dosing pipe 21. Then, it enters the flocculation tank 1 together with the wastewater, forming a swirling flow. The motor 5 drives the mating shaft 22 to rotate, which in turn drives the stirring chamber shaft 6 to rotate. The stirring chamber shaft 6 drives multiple stirring blades 7 to rotate around the axis of the stirring chamber shaft 6, stirring the wastewater in the flocculation tank 1. The drive assembly 16 drives the rotating rod 15 to rotate (the rotating rod 15 rotates more than one revolution), thereby driving the stirring blades 7 to rotate, thus adjusting the angle between the stirring blades 7 and the horizontal plane. The initial angle between the stirring blade 7 and the horizontal direction is 45° to 60°. Then, the destabilizing agent channel is closed, and the flocculant injection channel is opened for injection. The angle between the stirring blade 7 and the horizontal direction is adjusted to 15° to 30°. Under gentle stirring, the basic flocs aggregate and grow with the seed crystals as the core. Then, the flocculant injection channel is closed and the coagulant aid channel is opened to inject the coagulant aid. The stirring blade 7 is kept at an angle of (15° to 30°) with the horizontal direction. The treated wastewater is transported through the interceptor plate 9 to the buffer tank 10, and then enters the next process (deep purification unit) through the drain pipe 11. During the above process, the drive component 16 synchronously drives the piston 17 to rise, thereby extracting the precipitate crystals at the bottom of the flocculation tank 1 to be temporarily stored between the inner wall of the stirring chamber shaft 6 and the mating cover 14. The concentration of flocs in the flocculation tank 1 is detected by the turbidity sensor. When the turbidity sensor detects that the floc concentration is too low, the drive component 16 drives the piston 17 to fall, thereby releasing some of the precipitate crystals. It also ensures that the angle between the stirring blade 7 and the horizontal plane is increased (the rotating rod 15 turns more than one revolution), which can improve the stirring intensity and water disturbance effect, promote the full mixing of the reagent, wastewater and crystals, and accelerate the formation and aggregation of basic flocs. The drive shaft 162, in cooperation with the adjustment component 13, reduces the oscillation amplitude or oscillation frequency of the oscillation component 12 driving the filter screen cylinder 9, and only uses slight vibration to prevent flocs from adhering, while avoiding vibration impact that makes it difficult for small flocs to aggregate. When the turbidity sensor detects that the concentration of flocs in the flocculation tank 1 is too high, the piston 17 is driven to rise by the drive component 16, thereby extracting some of the precipitate crystals. The angle of the stirring blade 7 is reduced (the rotating rod 15 turns more than one revolution), which weakens the stirring shear force and avoids the breakage of large flocs caused by high-intensity stirring. The drive shaft 162, in conjunction with the adjustment component 13, synchronously increases the oscillation amplitude or frequency of the oscillation component 12 driving the filter screen cylinder 9. This allows for the rapid removal of the clogging flocs embedded in the mesh through a larger oscillation amplitude and frequency, achieving efficient desorption and effectively avoiding clogging.

[0042] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve any improvement to the software and methods.

[0043] 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, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage treatment device for silicon-containing wastewater, comprising a flocculation tank (1), wherein an inlet pipe (3) is fixedly connected to the bottom of the side wall of the flocculation tank (1), a dosing pipe (21) is connected to the inlet pipe (3), a discharge pipe (20) is fixedly connected to the bottom of the flocculation tank (1), and an outlet (8) is provided on the side wall of the flocculation tank (1), characterized in that, The outer wall of the flocculation tank (1) is also fixedly connected to a buffer tank (10), and a drain pipe (11) is fixedly connected to the buffer tank (10). A top cover (2) is fitted to the flocculation tank (1), and a motor (5) is fixedly connected to the top cover (2). A matching shaft (22) is fixedly connected to the drive end of the motor (5), and the matching shaft (22) is rotatably connected to the top cover (2). A stirring chamber shaft (6) is fixedly connected to the lower end of the matching shaft (22). Multiple sets of rotating rods (15) are rotatably connected to the outer wall of the stirring chamber shaft (6). A stirring blade (7) is fixedly connected to the end of each rotating rod (15) away from the stirring chamber shaft (6). A drive assembly (16) is provided between the multiple rotating rods (15). A turbidity sensor is also provided inside the flocculation tank (1). The bottom end of the stirring chamber shaft (6) is fixedly connected to a mating cover (14). A piston (17) is also slidably connected inside the stirring chamber shaft (6). The piston (17) is mated with the drive assembly (16). The drive assembly (16) drives the stirring blade (7) to rotate while driving the piston (17) to rise and fall.

2. The multi-stage treatment equipment for silicon-containing wastewater according to claim 1, characterized in that, A filter cylinder (9) is slidably disposed inside the outlet (8). An oscillation component (12) is disposed on the filter cylinder (9). An adjustment component (13) for adjusting the oscillation amplitude and oscillation frequency of the filter cylinder (9) is also disposed between the oscillation component (12) and the drive component (16). A scraper (19) is also disposed on the adjustment component (13).

3. The multi-stage treatment equipment for silicon-containing wastewater according to claim 2, characterized in that, The drive assembly (16) includes a second motor (161), a drive shaft (162), a drive cylinder (163), a groove (164), a rack (165), a second gear (166), a limiting rod (167), and a limiting groove (168). A motor (161) is fixedly connected to the top end of the stirring chamber shaft (6). A drive shaft (162) is fixedly connected to the drive end of the motor (161). A drive cylinder (163) is slidably connected to the inner wall of the stirring chamber shaft (6). A limit rod (167) is fixedly connected to the outer wall of the drive cylinder (163). A limit groove (168) is opened on the inner wall of the stirring chamber shaft (6). The limit rod (167) is slidably connected to the inner wall of the limit groove (168). A circumferentially evenly distributed groove (164) is also opened on the side wall of the drive cylinder (163). A rack (165) is fixedly connected to the inner wall of each groove (164). Multiple racks (165) are evenly distributed around the drive cylinder (163). A gear (166) is fixedly connected to one end of the rotating rod (15) located inside the stirring chamber shaft (6). The gear (166) meshes with the rack (165).

4. The multi-stage treatment equipment for silicon-containing wastewater according to claim 3, characterized in that, The oscillation assembly (12) includes a fixed disk (121), an oscillation groove (122), an abutment rod (123), a slide rod (124), and a spring (125). A slide rod (124) is fixedly connected to one end of the filter cylinder (9) away from the stirring chamber shaft (6), and the slide rod (124) is slidably connected to the buffer box (10). A spring (125) is also sleeved on the outer wall of the slide rod (124). An abutment rod (123) is fixedly connected to the outer wall of one end of the filter cylinder (9) close to the stirring chamber shaft (6). A fixed disk (121) is fixedly connected to the outer wall of the stirring chamber shaft (6). A plurality of evenly distributed oscillation grooves (122) are opened on the outer wall of the fixed disk (121), and the lower end of the fixed disk (121) is fixedly connected to the scraper (19).

5. The multi-stage treatment equipment for silicon-containing wastewater according to claim 4, characterized in that, The adjustment assembly (13) includes an embedded groove (131), an adjustment disc (132), an adjustment slot (133), a receiving slot (134), a gear one (135), a gear pair one (136), and a connecting rod (137). An embedding groove (131) is provided on the fixed plate (121). An adjusting plate (132) is rotatably connected to the inner wall of the embedding groove (131). Multiple sets of adjusting grooves (133) corresponding to the oscillation groove (122) are provided on the outer wall of the adjusting plate (132). A receiving groove (134) is provided on the adjusting plate (132). A gear one (135) is fixedly connected in the receiving groove (134). A connecting rod (137) is rotatably connected to the outer wall of the stirring chamber shaft (6). A gear pair one (136) is provided between the connecting rod (137) and the drive shaft (162). A gear three is fixedly connected to the other end of the connecting rod (137). The gear three meshes with the gear one (135).

6. The multi-stage treatment equipment for silicon-containing wastewater according to claim 5, characterized in that, The difference between the outer radius of the adjusting plate (132) and the inner radius of the adjusting groove (133) is greater than the difference between the outer radius of the adjusting plate (132) and the outer radius of the fixed plate (121).

7. The multi-stage treatment equipment for silicon-containing wastewater according to claim 6, characterized in that, The bottom end of the embedded groove (131) is provided with a second placement groove (26) that does not penetrate the fixing plate (121). A metal part (23) is fixedly installed in the second placement groove (26). A first placement groove (25) is provided on the adjusting plate (132). An electromagnet (24) is fixedly installed in the first placement groove (25), and an insulating layer is provided on the inner wall of the first placement groove (25).

8. The multi-stage treatment equipment for silicon-containing wastewater according to claim 1, characterized in that, A filter screen is also provided at the bottom of the inner end of the cover (14).

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