Aluminum nitride ceramic material grinding waste solid-liquid separation treatment system

Abstract

The utility model discloses an aluminum nitride ceramic material grinding waste solid-liquid separation treatment system which comprises a settling tank, a PH regulating tank, a PAC reaction tank, a conical barrel and a plate-and-frame filter press which are sequentially arranged and connected from left to right, and a driving mechanism is arranged above a tank body of the settling tank; a fixed cylinder is arranged on the upper wall of the tank body; a hollow blade shaft is also arranged below the fixed cylinder; paddles are fixed on the outer wall of the paddle shaft; the outer wall of the fixed cylinder is fixedly sleeved with a stabilizing ring, and a movable ring rotationally connected to the outer wall of the fixed cylinder is arranged above the stabilizing ring. The outer wall of the paddle shaft is fixedly sleeved with a fixed ring, and a spring connected with the fixed ring and the movable ring is arranged between the fixed ring and the movable ring; the end face, close to the paddle shaft, of the fixed barrel is provided with an edge protrusion with height changes, and the end face, close to the fixed barrel, of the paddle shaft is provided with a sliding rod capable of making contact with the edge protrusion. The utility model aims to solve the problems of low flocculation efficiency and easy adhesion of aluminum nitride powder particles on the inner wall of the tank body of the conventional settling tank.

Description

Technical Field

[0001] The utility model relates to the field of sewage and waste liquid treatment, and particularly relates to a solid-liquid separation treatment system for grinding waste of aluminum nitride ceramic materials. Background Technique

[0002] Due to its high thermal conductivity, electrical insulation and good mechanical properties, aluminum nitride ceramic materials are widely used in electronic packaging and high-temperature structural materials. However, during the grinding process, the mortar prepared with silicon carbide particles will gradually wear due to the grinding effect, resulting in a decrease in the grinding force. In addition, when the aluminum nitride ceramic powder comes into contact with water, a hydrolysis reaction will occur, generating ammonia nitrogen, which not only affects the properties of the waste liquid, but also makes the solid particles in the waste liquid more difficult to settle. As the grinding process progresses, aluminum nitride powder and other reaction products are mixed into the mortar, further reducing the grinding efficiency, and finally causing the mortar to be unable to continue to be used, thus generating a large amount of waste liquid and waste residue.

[0003] In the existing waste liquid treatment process, the sedimentation tank is usually used as the equipment for primary solid-liquid separation, and the solid particles are settled by the action of gravity. However, for the waste liquid generated by aluminum nitride ceramic materials, the traditional ordinary sedimentation tank has some obvious disadvantages: due to the small particles of aluminum nitride ceramic powder and the possible formation of colloidal substances, its sedimentation speed in the traditional sedimentation tank is slow and the sedimentation efficiency is low; the traditional sedimentation tank lacks an effective stirring and flocculation promotion mechanism, making it difficult to achieve the rapid flocculation of fine particles in the waste liquid, affecting the subsequent solid-liquid separation effect; aluminum nitride powder is easy to adhere to the inner wall of the sedimentation tank, forming a deposition layer that is difficult to remove, which not only reduces the effective volume of the tank body, but also may cause secondary pollution of the waste liquid; due to the lack of an automatic cleaning mechanism, the traditional sedimentation tank needs to be cleaned manually regularly, increasing the maintenance cost and operation complexity. Content of the Utility Model

[0004] The purpose of the utility model is to solve or alleviate the problems of low flocculation efficiency and easy adhesion of aluminum nitride powder particles to the inner wall of the tank body existing in the existing sedimentation tank, and to provide a solid-liquid separation treatment system for grinding waste of aluminum nitride ceramic materials.

[0005] The utility model is realized by the following technical solutions:

[0006] An aluminum nitride ceramic material grinding waste solid-liquid separation treatment system, including a sedimentation tank, a pH adjustment tank, a PAC reaction tank, a cone barrel, and a plate and frame filter press that are sequentially arranged and connected from left to right. There is a driving mechanism above the tank body of the sedimentation tank; a hollow fixed cylinder is provided on the upper wall of the tank body, and the driving shaft of the driving mechanism passes through the fixed cylinder and extends into the interior of the tank body; below the fixed cylinder, a hollow paddle shaft is further provided, and a limiting mechanism for movably connecting the driving shaft and the paddle shaft is also provided inside the paddle shaft; paddles are fixed on the outer wall of the paddle shaft; a stabilizing ring is fixedly sleeved on the outer wall of the fixed cylinder, and a movable ring rotatably connected to the outer wall of the fixed cylinder is provided above the stabilizing ring; a fixed ring is fixedly sleeved on the outer wall of the paddle shaft, and a spring for connecting each other is provided between the fixed ring and the movable ring; on the end face of the fixed cylinder close to the paddle shaft, there is an edge protrusion with a varying height, and on the end face of the paddle shaft close to the fixed cylinder, there is a sliding rod that can contact the edge protrusion; when the spring is in the initial position, the sliding rod contacts the edge protrusion with a lower height; when the driving shaft drives the paddle shaft to rotate, the flocculation process of powder particles is accelerated, the sliding rod slides along the circle formed by the edge protrusion, when the sliding rod contacts the higher position of the edge protrusion, the spring is stretched, and the paddle shaft falls under the action of gravity; when the sliding rod contacts the lower position of the edge protrusion, the spring restores, and at the same time pulls the paddle shaft upward, forming intermittent vibration to scrape the alumina powder attached to the inner wall of the tank.

[0007] Preferably, a PAM reaction tank is further provided between the PAC reaction tank and the cone barrel; the liquid inlet of the PAM reaction tank is connected to the liquid outlet of the PAC reaction tank, and the liquid outlet of the PAM reaction tank is connected to the liquid inlet of the cone barrel.

[0008] Preferably, a cleaning plate is fixedly provided at one end of the paddle away from the paddle shaft, and the cleaning plate has a radian matching the inner wall of the tank body.

[0009] Preferably, in the direction perpendicular to the paddle shaft, three paddles are respectively fixedly provided on the outer wall of the paddle shaft; taking the liquid surface in the tank body as the reference plane, the included angle between each paddle is 120°.

[0010] Preferably, the limiting mechanism includes a limiting block and a limiting groove. The limiting block is fixedly provided on the driving shaft, and the limiting groove is provided on the paddle shaft. The limiting groove is used to accommodate and limit the movement of the limiting block, thereby limiting the up and down movement stroke of the paddle shaft.

[0011] Preferably, a spherical groove is provided at one end of the sliding rod away from the paddle shaft, and a rolling ball matching the inner wall of the groove is provided in the groove. By introducing the rolling ball, the contact point becomes the rolling ball and the edge protrusion, thus significantly reducing the friction coefficient.

[0012] Preferably, the blade and the cleaning plate are combined into a cleaning unit; along the axial direction of the blade shaft, three cleaning units are successively arranged on the outer wall of the blade shaft from top to bottom, and the installation position of each cleaning unit is obtained by rotating the previous cleaning unit by 30°. The staggered arrangement can increase the cleaning area, improve the cleaning efficiency, and avoid mutual interference between the cleaning units.

[0013] Preferably, the number of the springs is three; in the rotation direction of the fixed ring, the included angle between each spring is 120°. A layout of an equilateral triangle is formed to ensure uniform distribution and balance of forces.

[0014] Preferably, the driving mechanism is a stepping motor.

[0015] Preferably, along the liquid outlet direction of the plate and frame filter press, an ultrafiltration device, a reverse osmosis device and a purified water water tank are successively connected from left to right.

[0016] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0017] 1. In the solution of the present utility model, the pH adjustment tank ensures that the waste liquid is subjected to subsequent treatment under suitable acid-base conditions, and the addition of the PAC reaction tank and the PAM reaction tank further promotes the formation of flocs and improves the efficiency of solid-liquid separation. The conical barrel serves as a sedimentation unit, providing sufficient sedimentation space for the flocs. Finally, the plate and frame filter press realizes fine solid-liquid separation through the action of pressure, and the series use of the ultrafiltration device and the reverse osmosis device further purifies the separated liquid, ensuring the recovery and reuse of water resources.

[0018] 2. By arranging a driving mechanism and a blade shaft in the sedimentation tank and cooperating with an intermittent vibration mechanism, the present utility model can accelerate the flocculation process of powder particles and improve the sedimentation efficiency. At the same time, the cleaning plate design on the blade shaft helps to scrape off the aluminum oxide powder attached to the inner wall of the tank, avoiding the accumulation of inner wall attachments and maintaining the long-term effective operation of the sedimentation tank.

[0019] 3. The intermittent vibration of the blade shaft of the present utility model promotes solid-liquid separation and also reduces the maintenance requirements of the inner wall of the sedimentation tank through scraping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model.

[0021] In the drawings:

[0022] Figure 1 is the overall connection structure diagram of the system of the present utility model;

[0023] Figure 2 Schematic diagram of the internal structure of the sedimentation tank of the present utility model;

[0024] Figure 3 is Figure 2 Enlarged view of the structure at position A of;

[0025] Figure 4 Top view of the sedimentation tank of the present utility model, aiming to show the installation positions of the paddle blades and the cleaning plates;

[0026] Figure 5 Schematic diagram of the structure of the fixed cylinder of the present utility model;

[0027] Figure 6 Schematic diagram of the system operation flow of the present utility model.

[0028] What the reference numerals represent are:

[0029] 1, sedimentation tank; 11, liquid collection port; 12, tank body; 13, motor; 14, drive shaft; 141, limit block; 142, stabilizing ring; 15, fixed cylinder; 151, movable ring; 152, spring; 153, fixed ring; 154, edge protrusion; 16, paddle shaft; 161, limit groove; 17, paddle blade; 171, cleaning plate; 18, sliding rod; 181, rolling ball; 2, PH adjustment tank; 3, PAC reaction tank; 4, PAM reaction tank; 5, cone barrel; 6, sludge pump; 7, plate and frame filter press. Specific embodiments

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model. The illustrative embodiments and their descriptions of the present utility model are only used to explain the present utility model and are not intended to limit the present utility model. It should be noted that the present utility model has been in the actual R & D and use stage.

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0032] There are deficiencies in the traditional sedimentation tank when treating the waste liquid of aluminum nitride ceramic materials: the aluminum nitride powder particles are fine, easy to form colloids, slow to settle, and low in efficiency; lack of stirring and flocculation functions, it is difficult to quickly agglomerate fine particles; the powder is easy to adhere to the inner wall, forming a deposition layer, reducing the volume, and may cause secondary pollution; lack of automatic cleaning, and it needs to be manually cleaned regularly, increasing the maintenance cost and complexity.

[0033] Example 1:

[0034] Please refer to the attached Figure 1 - Attachment Figure 6 A solid-liquid separation treatment system for the grinding waste of aluminum nitride ceramic materials, including a sedimentation tank 1, a pH adjustment tank 2, a PAC reaction tank 3, a conical barrel 5, and a plate and frame filter press 7 arranged and connected in sequence from left to right. There is a driving mechanism above the tank body 12 of the sedimentation tank 1; a hollow fixed cylinder 15 is provided on the upper wall of the tank body 12, and the driving shaft 14 of the driving mechanism passes through the fixed cylinder 15 and extends into the interior of the tank body 12; below the fixed cylinder 15, a hollow paddle shaft 16 is further provided, and a limiting mechanism for movably connecting the driving shaft 14 and the paddle shaft 16 is provided inside the paddle shaft 16; paddle blades 17 are fixed on the outer wall of the paddle shaft 16; a stabilizing ring 142 is fixedly sleeved on the outer wall of the fixed cylinder 15, and a movable ring 151 rotatably connected to the outer wall of the fixed cylinder 15 is provided above the stabilizing ring 142; a fixed ring 153 is fixedly sleeved on the outer wall of the paddle shaft 16, and a spring 152 connecting the two is provided between the fixed ring 153 and the movable ring 151; on the end face of the fixed cylinder 15 close to the paddle shaft 16, there is an edge protrusion 154 with a height change, and on the end face of the paddle shaft 16 close to the fixed cylinder 15, there is a sliding rod 18 that can contact the edge protrusion 154; when the spring 152 is in the initial position, the sliding rod 18 contacts the edge protrusion 154 with a lower height; when the driving shaft 14 drives the paddle shaft 16 to rotate, accelerating the flocculation process of the powder particles, the sliding rod 18 slides along the circle formed by the edge protrusion 154. When the sliding rod 18 contacts the higher position of the edge protrusion 154, the spring 152 is stretched, and the paddle shaft 16 drops under the action of gravity; when the sliding rod 18 contacts the lower position of the edge protrusion 154, the spring 152 returns to its original state, and at the same time pulls the paddle shaft 16 upward, forming intermittent vibrations to scrape the aluminum oxide powder adhering to the inner wall of the tank.

[0035] First, in order to achieve solid-liquid separation of aluminum nitride ceramic material grinding waste, sedimentation tank 1 is the initial stage of solid-liquid separation. The waste liquid first flows into the sedimentation tank 1, and the solid particles begin to settle due to gravity. In this system, the sedimentation tank 1 is also equipped with a driving mechanism and a paddle shaft 16, which promotes particle flocculation and scrapes off the inner wall attachments through stirring and intermittent vibration. The waste liquid preliminarily separated by the sedimentation tank 1 flows into the pH adjustment tank 2 to adjust the pH value. By adding acid or alkali (such as NaOH or HCl) to the waste liquid, its pH value is adjusted to near neutral, which is conducive to the formation of floccules and the removal of ammonia nitrogen in the subsequent treatment process. The waste liquid after pH adjustment enters the PAC reaction tank 3, Polyaluminium chloride (PAC) is added. PAC acts as a flocculant to react with suspended particles in the waste liquid, promotes the particles to aggregate into larger flocs, accelerates the sedimentation process, and helps to remove ammonia nitrogen. The waste liquid treated by the PAC reaction flows into the cone barrel 5 for further sedimentation. The design of the cone barrel 5 helps to increase the sedimentation area so that the flocs have enough time to settle to the bottom, thereby achieving more efficient solid-liquid separation. The waste liquid treated by the above steps finally flows into the plate and frame filter press 7 for solid-liquid separation. The plate and frame filter press 7 further compresses the solid particles in the waste liquid by pressure, the water is squeezed out and collected, and the solid particles form a filter cake, which can be recycled or further processed.

[0036] It can be understood that the present solution can accelerate the flocculation process of the particles through the stirring action of the paddle shaft 16, so that the solid particles can gather into larger floccules more quickly, thereby improving the sedimentation rate and separation efficiency; in addition, the intermittent vibration mechanism helps to scrape off the aluminum nitride powder attached to the inner wall of the sedimentation tank 1, keep the tank wall clean, and avoid the reduction of the volume of the tank body 12 or the decrease of the processing efficiency due to the accumulation of attachments on the inner wall. Since the vibration mechanism can automatically remove the attachments, the need for manual cleaning is reduced, and the maintenance cost and operation difficulty are reduced; through intermittent vibration, the deposition of solid particles in the sedimentation tank 1 can be prevented, the system can be maintained in long-term stable operation, and higher quality raw materials can be provided for subsequent steps such as pH adjustment, flocculation and filter pressing, thereby improving the effect of the entire treatment system.

[0037] In this scheme, the treatment process of waste liquid after entering the sedimentation tank is:

[0038] The waste liquid is first introduced into the sedimentation tank 1 through a pipeline or notch. At this stage, the waste liquid contains solid particles such as aluminum nitride ceramic powder, silicon carbide particles, and aluminum hydroxide. After the waste liquid enters the sedimentation tank 1, due to gravity, the heavier solid particles begin to sink to the bottom of the tank, forming a preliminary solid-liquid separation. The driving mechanism is activated, and the drive shaft 14 drives the paddle shaft 16 to rotate. The paddle 17 stirs the waste liquid in the tank, accelerating the dispersion and collision of solid particles and promoting the formation of flocs. As the paddle shaft 16 rotates, the intermittent vibration mechanism is activated. The interaction between the spring 152 and the sliding rod 18 causes the paddle shaft 16 to vibrate up and down, which helps to scrape off the attached powder on the inner wall of the sedimentation tank 1. Under the action of stirring and vibration, the solid particles in the waste liquid aggregate into larger flocs. Due to the increase in volume, the sedimentation speed of these flocs is accelerated. The flocs continue to sink to the bottom of the tank, while the cleaner liquid gradually rises to the upper part of the tank. This process achieves a more thorough solid-liquid separation. The solid particles (sludge) at the bottom of the tank are discharged regularly or continuously through the sludge discharge device for subsequent drying or treatment. The supernatant liquid after sedimentation separation, that is, the cleaner liquid, is discharged through the outlet at the top of the tank and enters the next treatment unit, such as the pH adjustment tank 2. The operation of the entire sedimentation tank 1 is continuous. The waste liquid continuously enters, and the treated solid and liquid are discharged respectively, maintaining the stable operation of the system.

[0039] In this solution, the working process of realizing stirring and flocculation and cleaning the inner wall of the tank is as follows:

[0040] The spring 152 is in its initial state, neither stretched nor compressed. The sliding rod 18 is located at the lower position of the edge projection 154 of the fixed cylinder 15, and at this time, the paddle shaft 16 is at its highest position; the drive mechanism (such as the stepper motor 13) is started, and the drive shaft 14 begins to rotate, driving the paddle shaft 16 to rotate. The paddle 17 on the paddle shaft 16 then starts to stir the waste liquid, accelerating the flocculation process of the powder particles; as the paddle shaft 16 rotates, the sliding rod 18 slides along the circular track formed by the edge projection 154 on the inner wall of the fixed cylinder 15. This circular track is composed of a series of projections with different heights on the fixed cylinder 15; when the sliding rod 18 slides to the projection at the higher position on the circular track, the spring 152 is stretched. Due to the stretching of the spring 152, a downward force is exerted on the paddle shaft 16, causing the paddle shaft 16 and the paddle 17 on it to move downward; the stretching of the spring 152 causes the paddle shaft 16 to further descend under the action of gravity, and the paddle 17 penetrates deeper into the waste liquid, increasing the depth and intensity of stirring, and further promoting the flocculation of the powder particles; when the sliding rod 18 slides to the projection at the lower position on the circular track, the spring 152 begins to recover because the stretching force on the spring 152 is reduced at this time; the upward force generated by the recovery of the spring 152 pulls up the paddle shaft 16, and the paddle 17 rises accordingly. This upward movement forms intermittent vibrations, which helps to scrape off the alumina powder adhering to the inner wall of the settling tank 1; as the paddle shaft 16 rotates continuously, the above process repeats, and the interaction between the spring 152 and the sliding rod 18 continuously generates intermittent vibrations, which not only promotes the flocculation process but also realizes the cleaning of the inner wall of the settling tank 1; the rotation speed of the drive shaft 14 and the stiffness of the spring 152 determine the frequency of the intermittent vibrations. By adjusting these parameters, the vibration effect can be optimized to meet different treatment requirements.

[0041] It can be understood that a sludge discharge port is designed at the bottom of the conical barrel 5 for collecting the settled sludge. When the sludge accumulates to a certain extent, it is discharged through the sludge discharge port; the sludge pump 6 is connected to the sludge discharge port of the conical barrel 5. When the sludge is ready to be transferred, the sludge pump 6 is started to prepare to transport the sludge to the plate and frame filter press 7; the sludge pump 6 generates pressure to transport the sludge in the conical barrel 5 to the plate and frame filter press 7 through a pipeline. The conveying capacity of the sludge pump 6 should match the system treatment capacity to ensure the continuous and stable conveyance of the sludge.

[0042] Please refer to the appendix Figure 1 As a further preference of this embodiment, a PAM reaction tank 4 is also provided between the PAC reaction tank 3 and the conical barrel 5; the liquid inlet of the PAM reaction tank 4 is connected to the liquid outlet of the PAC reaction tank 3, and the liquid outlet of the PAM reaction tank 4 is connected to the liquid inlet of the conical barrel 5.

[0043] It is understandable that by adding a PAM reaction tank 4 between the PAC reaction tank 3 and the conical barrel 5, the system can more effectively promote the flocculation of suspended particles in the waste liquid. Because PAM, as a polymer flocculant, can significantly enhance the formation of flocs, accelerate the sedimentation speed, and thus improve the overall separation efficiency. This setting improves the sedimentation performance, reduces the dosage of chemical flocculants, lowers the treatment cost, also improves the effluent quality, optimizes the dewatering performance of the sludge, and reduces the sludge treatment cost.

[0044] Please refer to the attached Figure 2 and the attached Figure 4 It should be noted that a cleaning plate 171 is fixedly provided at one end of the paddle 17 away from the paddle shaft 16, and the cleaning plate 171 has a curvature matching the inner wall of the tank body 12.

[0045] It is understandable that the cleaning plate 171 has a curvature matching the inner wall of the sedimentation tank 1, so that when the paddle 17 rotates, the cleaning plate 171 can closely fit the inner wall of the tank body 12, effectively scraping off the aluminum nitride powder and other solid particles attached to the inner wall; the cleaning plate 171 is made of a durable material, such as stainless steel or special plastic, to resist the erosion of chemical substances in the waste liquid; the cleaning plate 171 is fixed to the end of the paddle 17 by bolts, welding or clamping, etc., to ensure stability and durability during operation.

[0046] Please refer to the attached Figure 4 As a further preference of this embodiment, in the direction perpendicular to the paddle shaft 16, three paddles 17 are respectively fixedly provided on the outer wall of the paddle shaft 16; taking the liquid surface in the tank body 12 as the reference plane, the included angle between each two paddles 17 is 120°.

[0047] It should be noted that the paddles 17 are circumferentially distributed along the paddle shaft 16. Taking the liquid surface in the tank body 12 as the reference plane, the included angle between each two paddles 17 is 120°, forming an equilateral triangle layout; this distribution method ensures that the waste liquid is uniformly stirred in the sedimentation tank 1, which helps to improve the flocculation efficiency and sedimentation speed; the synchronous rotation of the paddles 17 can produce a coordinated stirring effect, avoiding problems of local over-stirring or insufficient stirring.

[0048] Please refer to the attached Figure 3 In this embodiment, there is an even better solution. The limiting mechanism includes a limiting block 141 and a limiting groove 161. The limiting block 141 is fixedly provided on the driving shaft 14, and the limiting groove 161 is provided on the paddle shaft 16. The limiting groove 161 is used to accommodate and limit the movement of the limiting block 141, thereby limiting the up and down movement stroke of the paddle shaft 16.

[0049] It should be noted that the limiting block 141 is made of a sturdy and durable material, and its shape and size are designed to fit the inner wall of the limiting groove 161. The limiting groove 161 is opened along the axial direction of the blade shaft 16, and the inner wall of the groove is designed with a guiding structure to ensure the smooth sliding of the limiting block 141 therein. The length and shape of the limiting groove 161 are designed to limit the movement range of the limiting block 141, thereby controlling the up and down movement stroke of the blade shaft 16 and preventing equipment damage caused by excessive movement.

[0050] Embodiment 2:

[0051] Please refer to the attached Figure 3 , as a further optimization of the above embodiment, a spherical groove is provided at one end of the sliding rod 18 away from the blade shaft 16, and a rolling ball 181 that matches the inner wall of the groove and contacts the edge protrusion 154 is provided in the groove.

[0052] It should be noted that when the sliding rod 18 directly contacts the edge protrusion 154, there may be problems such as large friction and fast wear. By introducing the rolling ball 181, the contact point becomes the rolling ball 181 and the edge protrusion 154, thereby significantly reducing the friction coefficient and reducing wear. The rolling of the rolling ball 181 in the spherical groove enables the sliding rod 18 to move smoothly along the circular trajectory of the edge protrusion 154, achieving a more stable intermittent vibration.

[0053] Embodiment 3:

[0054] Please refer to the attached Figure 2 , as a further optimization of the above embodiment, the blade 17 and the cleaning plate 171 are combined into a cleaning unit. Along the axial direction of the blade shaft 16, three cleaning units are sequentially provided on the outer wall of the blade shaft 16 from top to bottom, and the installation position of each cleaning unit is obtained by rotating the previous cleaning unit by 30°. Three cleaning units are sequentially provided on the outer wall of the blade shaft 16 from top to bottom, and each unit is arranged axially to ensure that the entire area covered by the blade shaft 16 can be effectively cleaned. The installation position of each cleaning unit is rotated by 30° relative to the previous unit. This staggered arrangement can increase the cleaning area, improve the cleaning efficiency, and avoid mutual interference between the cleaning units.

[0055] A better solution is that the number of springs 152 is three; in the rotation direction of the fixed ring 153, the included angle between each two springs 152 is 120°. The advantage of this solution is to form an equilateral triangle layout to ensure uniform distribution and balance of forces. The springs 152 are fixed on the fixed ring 153, and the other ends are connected to the movable ring 151. Through this connection method, the stretching and restoration of the springs 152 can be converted into the up and down vibration of the blade shaft 16.

[0056] Preferably, the drive mechanism is a stepper motor 13. This motor 13 can provide precise angle control and high torque output, and is suitable for precisely controlling the rotation and intermittent vibration of the blade shaft 16. The stepper motor 13 is connected to the control system, and through programming and feedback mechanisms, precise control of the movement of the blade shaft 16 is achieved, ensuring the stability and reliability of the system operation.

[0057] Preferably, along the liquid outlet direction of the plate and frame filter press 7, an ultrafiltration device, a reverse osmosis device, and a purified water tank are connected in sequence from left to right.

[0058] It can be understood that the liquid processed by the plate and frame filter press 7 is first discharged from the liquid outlet. Although the liquid obtained in this step has undergone preliminary solid-liquid separation, it still contains some fine suspended particles and dissolved substances; the discharged liquid first enters the ultrafiltration device. Ultrafiltration is a semi-permeable membrane separation technology that can further remove minute suspended particles, colloids, and some macromolecular organic substances in the liquid, improving the clarity of the water quality; the water treated by ultrafiltration continues to flow to the reverse osmosis device. Reverse osmosis technology can effectively remove dissolved salts, organic substances, microorganisms, etc. in the water through a highly selective semi-permeable membrane, producing water close to pure water; the purified water treated by reverse osmosis finally flows into the purified water tank. At this time, the water has reached a relatively high purity and can meet the standards of industrial or domestic water use, realizing the recycling of resources.

[0059] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present disclosure. The following points need to be explained: In the embodiment drawings of the present invention, only the structures related to the embodiments of the present invention are involved, and other structures can refer to the usual designs. Without conflict, the features in the same embodiment and different embodiments of the present invention can be combined with each other. The above is only an exemplary implementation manner of the present invention, rather than being used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste, comprising a sedimentation tank (1), a pH adjustment tank (2), a PAC reaction tank (3), a cone barrel (5) and a plate-frame filter press (7) which are arranged and connected in sequence from left to right, characterized in that: A driving mechanism is provided above the tank body (12) of the sedimentation tank (1); a hollow fixed cylinder (15) is provided on the upper wall of the tank body (12), and a driving shaft (14) of the driving mechanism passes through the fixed cylinder (15) and extends into the tank body (12); a hollow blade shaft (16) is provided below the fixed cylinder (15), and a limiting mechanism for movably connecting the driving shaft (14) and the blade shaft (16) is provided inside the blade shaft (16); a blade (17) is fixed on the outer wall of the blade shaft (16); a stabilizing ring (142) is provided on the fixed sleeve on the outer wall of the fixed cylinder (15), and a movable ring (151) rotatably connected to the outer wall of the fixed cylinder (15) is provided above the stabilizing ring (142); a fixing ring (153) is provided on the fixed sleeve on the outer wall of the blade shaft (16), and a spring (152) is provided between the fixing ring (153) and the movable ring (151) to connect them; the fixed cylinder (15) is close to the fixed cylinder (15). An edge protrusion (154) with a variable height is provided on the end surface of the paddle shaft (16), and a sliding rod (18) capable of contacting the edge protrusion (154) is provided on the end surface of the paddle shaft (16) close to the fixed cylinder (15); when the spring (152) is in an initial position, the sliding rod (18) contacts the edge protrusion (154) with a lower height; when the driving shaft (14) drives the paddle shaft (16) to rotate, the flocculation process of the powder particles is accelerated, and the sliding rod (18) slides along the circle formed by the edge protrusion (154); when the sliding rod (18) contacts the higher position of the edge protrusion (154), the spring (152) is stretched, and the paddle shaft (16) falls under the action of gravity; when the sliding rod (18) contacts the lower position of the edge protrusion (154), the spring (152) recovers and pulls the paddle shaft (16) upward at the same time, forming intermittent vibration to scrape off the aluminum oxide powder attached to the inner wall of the tank body.

2. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 1 is characterized in that: A PAM reaction pool (4) is also provided between the PAC reaction pool (3) and the conical barrel (5); the liquid inlet of the PAM reaction pool (4) is connected to the liquid outlet of the PAC reaction pool (3), and the liquid outlet of the PAM reaction pool (4) is connected to the liquid inlet of the conical barrel (5).

3. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 2 is characterized in that: A cleaning plate (171) is fixedly provided at one end of the blade (17) away from the blade shaft (16); the cleaning plate (171) has an arc that matches the inner wall of the tank body (12).

4. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 3 is characterized in that: Three paddles (17) are fixedly disposed on the outer wall of the paddle shaft (16) in a direction perpendicular to the paddle shaft (16); with the liquid surface in the tank body (12) as a reference plane, the angle between each paddle (17) is 120°.

5. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 4 is characterized in that: The limiting mechanism comprises a limiting block (141) and a limiting groove (161); the limiting block (141) is fixedly arranged on the driving shaft (14); the limiting groove (161) is arranged on the blade shaft (16); the limiting groove (161) is used to accommodate and limit the movement of the limiting block (141), thereby limiting the up and down movement stroke of the blade shaft (16).

6. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 5 is characterized in that: A spherical groove is provided at one end of the sliding rod (18) away from the blade shaft (16), and a rolling ball (181) matching the inner wall of the groove is provided in the groove.

7. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 6 is characterized in that: The paddle (17) and the cleaning plate (171) are combined into a cleaning unit; along the axial direction of the paddle shaft (16), three cleaning units are sequentially arranged on the outer wall of the paddle shaft (16) from top to bottom, and the installation position of each cleaning unit is obtained by rotating the previous cleaning unit by 30 degrees.

8. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 7 is characterized in that: The number of the springs (152) is three; in the rotation direction of the fixing ring (153), the angle between each spring (152) is 120°.

9. The solid-liquid separation treatment system for aluminum nitride ceramic material grinding waste according to claim 8 is characterized in that: The driving mechanism is a stepping motor (13).

10. A solid-liquid separation and treatment system for aluminum nitride ceramic material grinding waste according to any one of claims 1 to 9, characterized in that: Along the liquid outlet direction of the plate and frame filter press (7), an ultrafiltration device, a reverse osmosis device and a purified water tank are sequentially connected from left to right.

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