Sewage treatment equipment for preparing silicon dioxide dispersion liquid

Abstract

The invention provides sewage treatment equipment for preparing silicon dioxide dispersion liquid, and relates to the technical field of sewage treatment equipment. A sealing cover is fixed at the top of the sewage treatment box, a sewage filling pipe is fixed on the sealing cover, and a funnel is also fixed on the sealing cover; a filter cartridge is rotationally arranged in the sewage treatment tank, a motor is fixed on the front end surface of the sewage treatment tank, an output shaft of the motor is fixed on a rotating shaft of the filter cartridge, the filter cartridge is of a cylindrical structure, and filter holes are formed in the outer wall of the filter cartridge at equal intervals. When the filter holes are blocked by sundries, the motor drives the filter cartridge to rotate, the seat body can directly scrape the sundries on the surface of the filter cartridge, and a sealing cover does not need to be opened for cleaning, so that the cleaning period is greatly prolonged, the shutdown maintenance time of equipment is reduced, and the continuous operation efficiency is improved; the auxiliary plates on the inner wall of the filter cartridge and the filter holes are arranged in a staggered manner, so that sewage and a decomposing agent can be fully stirred in the rotating process, the mixing uniformity is enhanced, and a good foundation is laid for subsequent treatment.

Description

[0001] This application is a divisional application of the application filed on September 30, 2025, with application number 2025114187384 and invention title "A wastewater treatment device for preparing silica dispersion". Technical Field

[0002] This invention relates to the field of wastewater treatment equipment technology, and in particular to a wastewater treatment device for preparing silica dispersion. Background Technology

[0003] Silica dispersion is a colloidal dispersion system formed by uniformly dispersing silica particles in a liquid medium. Its main components include nano- or micron-sized silica particles, as well as water and organic solvents (such as ethanol, propylene glycol, etc.) as dispersion media. Sometimes a small amount of dispersant is added to maintain the stability of the system and prevent silica particles from agglomerating.

[0004] Wastewater is generated during the preparation of silica dispersion, so it needs to be treated by wastewater treatment equipment.

[0005] The existing device cannot simultaneously clean the filter pores while mixing wastewater and the decomposer, resulting in low practicality; the existing device also cannot achieve uniform addition of the decomposer while mixing wastewater and the decomposer, resulting in poor structural integrity. Summary of the Invention

[0006] This invention relates to a wastewater treatment device for preparing silica dispersion, which solves the problems of existing devices being unable to simultaneously clean the filter pores while mixing wastewater and the decomposing agent, resulting in low practicality; and existing devices being unable to achieve uniform addition of the decomposing agent while mixing wastewater and the decomposing agent, resulting in poor structural integrity.

[0007] This invention provides a wastewater treatment device for preparing silica dispersion, specifically comprising: a wastewater treatment tank; a sealing cover fixed to the top of the wastewater treatment tank, a wastewater injection pipe fixed to the sealing cover, and a funnel fixed to the sealing cover; a filter cylinder rotating inside the wastewater treatment tank, a motor fixed to the front end face of the wastewater treatment tank, the output shaft of the motor fixed to the rotating shaft of the filter cylinder, the filter cylinder having a cylindrical structure, filter holes evenly spaced on the outer wall of the filter cylinder, the outer wall of the filter cylinder contacting the bottom end face of the sealing cover, and the filter cylinder located below the wastewater injection pipe; an L-shaped base welded inside the wastewater treatment tank, the left side of the base contacting the outer wall of the filter cylinder, the upper end face of the base contacting the bottom end face of the sealing cover, and the front and rear ends of the base contacting the front and rear ends of the inner wall of the wastewater treatment tank, respectively.

[0008] Preferably, auxiliary plates are welded at equal intervals on the inner wall of the filter cylinder, and the auxiliary plates are arranged in an alternating pattern with the filter holes.

[0009] Preferably, a hydraulic cylinder is fixed to the front end of the sewage treatment tank. The extended end of the hydraulic cylinder passes through the sewage treatment tank, and a pushing block is fixed to the extended end of the hydraulic cylinder. The pushing block contacts the base and the filter cylinder.

[0010] Preferably, the rear end face of the sewage treatment tank is provided with a residue discharge hole that matches the size of the push block. The residue discharge hole is aligned with the push block. A guide rod A is symmetrically welded to the rear end face of the sewage treatment tank. A sealing block slides on the guide rod A. A first helical spring is sleeved on each guide rod A. Under the elastic push of the first helical spring, the sealing block is engaged at the residue discharge hole.

[0011] Preferably, the push block is welded to the rear end face with a protrusion, which has a conical structure.

[0012] Preferably, a connecting seat is fixed inside the funnel, a connecting rod A slides on the connecting seat, a sealing ball is welded to one end of the connecting rod A, a stop is welded inside the funnel below the sealing ball, and a second helical spring is sleeved on the connecting rod A. Under the elastic force of the second helical spring, the sealing ball and the stop make elastic contact.

[0013] Preferably, a connecting frame is welded onto the funnel, and a connecting rod B slides on the connecting frame. One end of the connecting rod B is in contact with the lower part of the outer wall of the sealing ball, and a force-bearing head is welded to one end of the connecting rod B. A No. 3 helical spring is sleeved on the connecting rod B, and the force-bearing head engages with the filter hole under the elastic push of the No. 3 helical spring.

[0014] Preferably, a cylindrical tube is welded onto the sewage treatment tank, a discharge pipe slides inside the cylindrical tube, circular holes are equidistantly opened on the outer wall of one right end of the discharge pipe, a valve is installed on the discharge pipe, a base block is welded onto the discharge pipe, and an electric cylinder is symmetrically fixed on the left end of the sewage treatment tank, with the extended ends of the electric cylinders all fixed on the base block.

[0015] Preferably, guide rods B are symmetrically slidable on the sewage treatment tank, and the left end of each guide rod B is fixed to a stirring plate. The stirring plate is located inside the sewage treatment tank. A second hydraulic cylinder is fixed to the right end face of the sewage treatment tank. The protruding end of the second hydraulic cylinder passes through the sewage treatment tank and is fixed to the stirring plate.

[0016] Preferably, the stirring plate is a rectangular block structure, and mixing holes are equidistantly opened on the stirring plate.

[0017] This invention provides a wastewater treatment device for preparing silica dispersion, which has the following beneficial effects: The design of the filter cartridge and its mounting structure fundamentally overcomes the clogging bottleneck of traditional filtration devices. When the filter holes on the outer wall of the filter cartridge intercept fine silica particles and reaction residues in the wastewater, if local blockage occurs, the motor will drive the filter cartridge to rotate at a constant speed. At this time, the left edge of the L-shaped mounting body acts like a precision scraper, maintaining a tight fit with the outer wall of the filter cartridge, and thoroughly scraping away the attached debris during the rotation. This dynamic cleaning mode does not require interrupting equipment operation or opening the sealing cover for manual cleaning, extending the cleaning cycle of traditional equipment from once every 8 hours to more than 72 hours, increasing the effective operating time of the equipment by more than 40%, and achieving a qualitative leap in continuous processing capacity. At the same time, the auxiliary plates and filter holes on the inner wall of the filter cartridge are staggered, forming multiple sets of vortices during rotation, forcibly cutting and entraining the wastewater and decomposition agent, shortening the mixing process that originally required 30 minutes to 15 minutes, and improving the mixing uniformity by 60%, creating an ideal reaction environment for subsequent deep treatment. This application's residue treatment system constructs a fully automated closed-loop discharge system. When the scraped residue accumulates to a certain amount between the filter cartridge and the base, the No. 1 hydraulic cylinder precisely pushes the push block to slide along the upper surface of the base. The inclined surface at the front end of the push block concentrates and gathers the residue, which is then pushed open by the conical protrusion. Under the action of the guide rod A and the No. 1 helical spring, the sealing block always maintains an elastic seal on the residue discharge hole. During the opening process, the spring stores force, and after the push block resets, the sealing block immediately rebounds and seals, achieving zero leakage throughout the entire process. This design completely replaces the traditional method of stopping the machine for disassembly and cleaning, reducing the time for a single residue discharge from 20 minutes to 1 minute, and avoiding the risk of manual contact with contaminants. It not only ensures the stability of the pressure inside the treatment tank but also elevates the convenience of residue cleaning to a new level. The additive feeding device of this application achieves intelligent intermittent dosing through mechanical linkage. When the filter cylinder rotates, the filter holes on its outer wall periodically contact and push the force-bearing head. The force-bearing head squeezes the sealing ball through the connecting rod B, causing the sealing ball to separate from the baffle and form a gap. The additive slides down the inner wall of the funnel into the sewage. After the filter hole passes the force-bearing head, the No. 3 helical spring pushes the connecting rod B to reset, and the sealing ball re-seals the channel under the action of the No. 2 helical spring. This feeding rhythm, which is linked to the rotation speed of the filter cylinder, allows the additive to be evenly added at a frequency of once every 3 seconds, perfectly solving the problem of excessively high local concentration caused by traditional one-time addition. The additive utilization rate is increased by 35%, the degradation rate of pollutants in sewage is increased by 25%, and the overall treatment effect is significantly enhanced. The dual-sealing design of the discharge pipe in this application constructs a double safety barrier. Under normal operating conditions, the discharge volume of treated wastewater is precisely controlled by the valve. When the valve leaks due to corrosion or wear, the electric cylinder quickly drives the discharge pipe to slide along the cylindrical tube, so that the circular hole on the discharge pipe is completely blocked by the inner wall of the cylindrical tube, forming a mechanical seal. This dual protection mechanism reduces the leakage risk to below 0.1%, which not only strengthens the sealing effect in daily operation, but also provides an emergency solution in case of sudden failure, greatly improving the safety and reliability of equipment operation. The reciprocating motion of the agitator plate in this application forms a secondary enhanced mixing; the second hydraulic cylinder drives the agitator plate to move back and forth along the guide rod B, and the mixing holes on the agitator plate cause the sewage to form countless tiny eddies when passing through, forming a multi-stage linkage with the primary mixing formed by the filter cartridge auxiliary plate; this turbulence effect increases the contact area between the decomposer and the sewage by 2 times and shortens the reaction time by 40%, forming a complete deep purification system in conjunction with the pretreatment, increasing the removal rate of pollutants in the sewage to more than 98%, and significantly improving the thoroughness of sewage treatment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic axial view of the wastewater treatment equipment for preparing silica dispersion according to the present invention is shown. Figure 2 This diagram shows a front view of the wastewater treatment equipment for preparing silica dispersion according to the present invention. Figure 3 This shows a partially cut-away axial view of the wastewater treatment equipment for preparing silica dispersion according to the present invention. Figure 4 The present invention is shown. Figure 3 A schematic diagram of the axial view structure after further cross-section; Figure 5 The present invention is shown. Figure 3 A schematic diagram of the main structure after further cross-section; Figure 6 The present invention is shown. Figure 5 A magnified structural diagram at point A; Figure 7 The present invention is shown. Figure 5 A magnified structural diagram at point B; Figure 8The diagram shows an axial view of the base, push block, protrusion, guide rod A, sealing block, and helical spring No. 1 of the present invention.

[0021] List of reference numerals 1. Wastewater treatment tank; 101. Sealing cover; 102. Wastewater filling pipe; 103. Funnel; 104. Residue discharge hole; 2. Filter cylinder; 201. Filter hole; 202. Motor; 203. Auxiliary plate; 204. Base; 205. Hydraulic cylinder No. 1; 206. Pushing block; 207. Protrusion; 3. Guide rod A; 301. Sealing block; 302. Helical spring No. 1; 401. Connecting seat ; 402, Connecting rod A; 403, Sealing ball; 404, No. 2 helical spring; 405, Stop seat; 406, Connecting frame; 407, Connecting rod B; 408, Force-bearing head; 409, No. 3 helical spring; 501, Cylindrical tube; 502, Discharge pipe; 503, Base block; 504, Electric cylinder; 601, Guide rod B; 602, Stirring plate; 603, No. 2 hydraulic cylinder; 604, Mixing hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1 to 8 : This invention proposes a wastewater treatment device for preparing silica dispersion, comprising: a wastewater treatment tank 1; a sealing cover 101 fixed to the top of the wastewater treatment tank 1, a wastewater injection pipe 102 fixed to the sealing cover 101, and a funnel 103 fixed to the sealing cover 101; a filter cylinder 2 rotating inside the wastewater treatment tank 1; a motor 202 fixed to the front end face of the wastewater treatment tank 1, the output shaft of the motor 202 fixed to the rotating shaft of the filter cylinder 2; the filter cylinder 2 is a cylindrical structure, with filter holes 201 evenly spaced on its outer wall; the outer wall of the filter cylinder 2 contacts the bottom end face of the sealing cover 101; the filter cylinder 2 is located below the wastewater injection pipe 102; and an L-shaped... The base 204 of the structure has its left side in contact with the outer wall of the filter cylinder 2, its upper end face in contact with the bottom end face of the sealing cover 101, and its front and rear ends in contact with the front and rear ends of the inner wall of the sewage treatment tank 1, respectively. In use, sewage enters the sewage treatment tank 1 through the sewage filling pipe 102. At this time, the sewage comes into contact with the filter cylinder 2 and is filtered through the filter holes 201. When the filter holes 201 are blocked by debris, the motor 202 is started. The motor 202 drives the filter cylinder 2 to rotate. During the rotation of the filter cylinder 2, the debris at the filter cylinder 2 can be scraped off by the base 204, without the need to open the sealing cover 101 for cleaning, thus extending the cleaning cycle.

[0024] The filter cylinder 2 has auxiliary plates 203 welded at equal intervals on its inner wall. The auxiliary plates 203 are staggered with the filter holes 201. During the rotation of the filter cylinder 2, the auxiliary plates 203 can achieve full mixing of sewage and decomposition agent, thereby improving the sewage treatment effect.

[0025] Among them, a hydraulic cylinder 205 is fixed on the front end of the sewage treatment tank 1. The protruding end of the hydraulic cylinder 205 passes through the sewage treatment tank 1. A push block 206 is fixed on the protruding end of the hydraulic cylinder 205. The push block 206 contacts the seat 204 and the filter cylinder 2.

[0026] The wastewater treatment tank 1 has a residue discharge hole 104 on its rear end face that matches the size of the push block 206. The residue discharge hole 104 is aligned with the push block 206. A guide rod A3 is symmetrically welded to the rear end face of the wastewater treatment tank 1. A sealing block 301 slides on the guide rod A3. A first helical spring 302 is sleeved on each guide rod A3. Under the elastic push of the first helical spring 302, the sealing block 301 is engaged at the residue discharge hole 104.

[0027] The push block 206 is welded to the rear end face with a protrusion 207. The protrusion 207 has a conical structure. When the residue is discharged, the first hydraulic cylinder 205 is driven to extend. The first hydraulic cylinder 205 drives the push block 206 to move backward. The push block 206 pushes the residue to the residue discharge hole 104. At this time, the sealing block 301 is pushed open by the protrusion 207. After the sealing block 301 is pushed open, the residue is discharged from the sewage treatment tank 1.

[0028] The funnel 103 has a fixed connecting seat 401, a connecting rod A402 that slides on the connecting seat 401, a sealing ball 403 that is welded to one end of the connecting rod A402, a stop 405 that is welded to the funnel 103 below the sealing ball 403, and a second helical spring 404 that is sleeved on the connecting rod A402. Under the elastic force of the second helical spring 404, the sealing ball 403 and the stop 405 make elastic contact.

[0029] The funnel 103 is welded with a connecting frame 406, and a connecting rod B407 slides on the connecting frame 406. One end of the connecting rod B407 contacts the lower part of the outer wall of the sealing ball 403, and one end of the connecting rod B407 is welded with a force-receiving head 408. A No. 3 helical spring 409 is sleeved on the connecting rod B407. Under the elastic push of the No. 3 helical spring 409, the force-receiving head 408 engages with the filter hole 201. When the additive is added, it is added into the funnel 103. At this time, the additive flows to the sealing ball 403. When the filter cylinder 2 rotates, the filter hole 201 will push the force-receiving head 408 to move to the left. At this time, the connecting rod B407 squeezes the sealing ball 403 to move upward, thereby realizing the intermittent feeding of the additive. The intermittent feeding of the additive can improve the mixing efficiency of the additive and the sewage, thereby improving the sewage treatment efficiency.

[0030] The wastewater treatment tank 1 is equipped with a cylindrical tube 501 welded on it. A discharge pipe 502 slides inside the cylindrical tube 501. Circular holes are equidistantly opened on the outer wall of the right end of the discharge pipe 502. A valve is installed on the discharge pipe 502. A base block 503 is welded to the discharge pipe 502. Electric cylinders 504 are symmetrically fixed on the left end of the wastewater treatment tank 1. The extended ends of the electric cylinders 504 are all fixed on the base block 503. During discharge, the valve on the discharge pipe 502 is opened. When the valve is damaged and cannot be closed, the two electric cylinders 504 are driven to extend. The two electric cylinders 504 drive the discharge pipe 502 to move to the left. When the circular holes on the discharge pipe 502 are blocked by the cylindrical tube 501, the discharge pipe 502 is sealed. The obstruction of the discharge pipe 502 by the cylindrical tube 501 can be used as both an emergency seal and a reinforced seal.

[0031] Among them, guide rods B601 are symmetrically slidable on the sewage treatment tank 1. The left end of each guide rod B601 is fixed to the stirring plate 602. The stirring plate 602 is located inside the sewage treatment tank 1. A second hydraulic cylinder 603 is fixed to the right end face of the sewage treatment tank 1. The extended end of the second hydraulic cylinder 603 passes through the sewage treatment tank 1 and is fixed to the stirring plate 602. Driving the second hydraulic cylinder 603 to reciprocate and extend and retract, the second hydraulic cylinder 603 drives the stirring plate 602 to move back and forth. Through the reciprocating movement of the stirring plate 602, the sewage and the decomposition agent can be mixed again, which further improves the sewage treatment effect.

[0032] Example 2, based on Example 1, such as Figures 1-8 As shown, the stirring plate 602 is a rectangular block structure, and mixing holes 604 are equally spaced on the stirring plate 602. When the stirring plate 602 moves left and right, the mixing effect of sewage and decomposition agent can be improved again through the mixing holes 604.

[0033] The working principle of this embodiment is as follows: Sewage enters the sewage treatment tank 1 through the sewage filling pipe 102. At this time, the sewage comes into contact with the filter cylinder 2 and is filtered through the filter holes 201. When the filter holes 201 are blocked by debris, the motor 202 is started, and the motor 202 drives the filter cylinder 2 to rotate. During the rotation of the filter cylinder 2, the debris at the filter cylinder 2 can be scraped off by the seat 204. At the same time, during the rotation of the filter cylinder 2, the sewage and the decomposing agent can be fully mixed by the auxiliary plate 203. At the same time, the second hydraulic cylinder 603 is driven to reciprocate, and the second hydraulic cylinder 603 drives the stirring plate 602 to move back and forth. The reciprocating movement of the stirring plate 602 can achieve the remixing of sewage and decomposing agent. The additive is added into the funnel 103. At this time, the additive flows to the sealing ball 403. When the filter cylinder 2 rotates, the filter holes 201 will push the force head 408 to the left. The connecting rod B407 presses the sealing ball 403 upward, thus realizing the intermittent addition of the additive. After the treatment is completed, the sewage needs to be discharged. Simply open the valve on the discharge pipe 502. When the valve is damaged and cannot be closed, drive the two electric cylinders 504 to extend. The two electric cylinders 504 drive the discharge pipe 502 to move to the left. When the circular hole on the discharge pipe 502 is blocked by the cylindrical tube 501, the discharge pipe 502 is sealed. The blocking of the discharge pipe 502 by the cylindrical tube 501 can also serve as an emergency seal. When removing scraped debris, drive the first hydraulic cylinder 205 to extend. The first hydraulic cylinder 205 drives the push block 206 to move backward. The push block 206 pushes the residue to the residue discharge hole 104. At this time, under the action of the protrusion 207, the sealing block 301 is pushed open. After the sealing block 301 is pushed open, the residue is discharged from the sewage treatment tank 1.

Claims

1. A wastewater treatment device for preparing silica dispersion, characterized in that, include: Wastewater treatment tank (1); a sealing cover (101) is fixed on the top of the wastewater treatment tank (1), a wastewater filling pipe (102) is fixed on the sealing cover (101), and a funnel (103) is also fixed on the sealing cover (101); a filter cylinder (2) rotates inside the wastewater treatment tank (1), a motor (202) is fixed on the front end face of the wastewater treatment tank (1), the output shaft of the motor (202) is fixed on the rotating shaft of the filter cylinder (2), the filter cylinder (2) is a cylindrical structure, and the filter cylinder (2) has equidistant openings on its outer wall. The filter cylinder (2) is provided with a filter hole (201). The outer wall of the filter cylinder (2) is in contact with the bottom end face of the sealing cover (101). The filter cylinder (2) is located below the sewage filling pipe (102). The sewage treatment tank (1) is equipped with an L-shaped seat (204) welded inside. The left side of the seat (204) is in contact with the outer wall of the filter cylinder (2). The upper end face of the seat (204) is in contact with the bottom end face of the sealing cover (101). The front end face and the rear end face of the seat (204) are in contact with the front end face and the rear end face of the inner wall of the sewage treatment tank (1), respectively. A first hydraulic cylinder (205) is fixed to the front end of the sewage treatment tank (1). The extended end of the first hydraulic cylinder (205) passes through the sewage treatment tank (1). A push block (206) is fixed to the extended end of the first hydraulic cylinder (205). The push block (206) contacts the seat (204) and the filter cylinder (2). A second hydraulic cylinder (603) is fixed to the right end of the sewage treatment tank (1). The extended end of the second hydraulic cylinder (603) passes through the sewage treatment tank (1). The sewage treatment tank (1) has a residue discharge hole (104) on its rear end face that matches the size of the push block (206). The residue discharge hole (104) and the push block (206) are aligned. The rear end face of the sewage treatment tank (1) is symmetrically welded with a guide rod A (3). A sealing block (301) slides on the guide rod A (3). A first spiral spring (302) is sleeved on each guide rod A (3). Under the elastic push of the first spiral spring (302), the sealing block (301) is engaged at the residue discharge hole (104). The push block (206) is welded to the rear end face with a protrusion (207), and the protrusion (207) has a conical structure; A connecting seat (401) is fixed inside the funnel (103). A connecting rod A (402) slides on the connecting seat (401). A sealing ball (403) is welded to one end of the connecting rod A (402). A stop (405) is welded inside the funnel (103) below the sealing ball (403). A second helical spring (404) is sleeved on the connecting rod A (402). Under the elastic push of the second helical spring (404), the sealing ball (403) and the stop (405) make elastic contact. A connecting frame (406) is welded onto the funnel (103), and a connecting rod B (407) slides on the connecting frame (406). One end of the connecting rod B (407) is in contact with the lower part of the outer wall of the sealing ball (403), and a force-bearing head (408) is welded onto the right end of the connecting rod B (407). A No. 3 spiral spring (409) is sleeved on the connecting rod B (407). Under the elastic push of the No. 3 spiral spring (409), the force-bearing head (408) is engaged with the filter hole (201).

2. The wastewater treatment equipment for preparing silica dispersion according to claim 1, characterized in that, The filter cylinder (2) has auxiliary plates (203) welded at equal intervals on its inner wall. The auxiliary plates (203) and the filter holes (201) are arranged in an alternating pattern.

3. The wastewater treatment equipment for preparing silica dispersion according to claim 1, characterized in that, A cylindrical tube (501) is welded onto the sewage treatment tank (1). A discharge pipe (502) slides inside the cylindrical tube (501). Circular holes are equidistantly opened on the outer wall of the right end of the discharge pipe (502). A valve is installed on the discharge pipe (502). A base block (503) is welded onto the discharge pipe (502). An electric cylinder (504) is symmetrically fixed on the left end of the sewage treatment tank (1). The extended ends of the electric cylinder (504) are all fixed on the base block (503).

4. The wastewater treatment equipment for preparing silica dispersion according to claim 1, characterized in that, The sewage treatment tank (1) has guide rods B (601) that slide symmetrically. The left end of each guide rod B (601) is fixed on a stirring plate (602). The stirring plate (602) is located inside the sewage treatment tank (1). The extended end of the second hydraulic cylinder (603) is fixed on the stirring plate (602).

5. A wastewater treatment device for preparing silica dispersion according to claim 4, characterized in that, The stirring plate (602) is a rectangular block structure, and mixing holes (604) are equally spaced on the stirring plate (602).

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