High-precision fine-particle mud-sand separator

Abstract

The utility model relates to the technical field of separators, and provides a high-precision fine-particle mud-sand separator, which comprises a flow stabilizer, a separation box and a sand lifting assembly, the side wall of the flow stabilizer is provided with a flow stabilizer tangential inlet, and the flow stabilizer tangential inlet is used for inputting a sand-water mixture into the flow stabilizer; a flow stabilizer underflow outlet is formed in the bottom of the flow stabilizer; the flow stabilizer is used for concentrating the sand-water mixed liquid; the separation box is provided with a separation box tangential inlet which is communicated with the flow stabilizer underflow outlet and is used for inputting a concentrated sand-water mixture into the separation box; a sediment sand outlet is formed in the bottom of the separation box; the sand lifting assembly is obliquely arranged at the bottom of the separation box and provided with a sand lifting channel, an inlet is formed in the bottom of the sand lifting channel, and a sand outlet is formed in the lower surface of the top of the sand lifting channel. According to the embodiment of the utility model, the hydraulic load of the separation box is reduced by additionally arranging the flow stabilizer; the tangential inlet of the separation box is formed in the separation box, so that the moving track length of particles in the separation box is increased, the precipitation time is prolonged, and short flow or turbulent flow is avoided.

Description

Technical Field

[0001] This utility model relates to the field of separator technology, and in particular to a high-precision fine-particle mud and sand separator. Background Technology

[0002] In industrial production, especially in sand and gravel processing, building material manufacturing, mining, and coal processing, solid-liquid separation is a crucial process. Sand-water separators, as key equipment for achieving this goal, primarily function to effectively separate suspensions (such as mud and wastewater) containing large amounts of sand and other solid impurities, thereby reducing the sand content in the liquid and improving the efficiency and product quality of subsequent processing. Among these, spiral sand-water separators are widely used in the aforementioned industries due to their compact structure, large processing capacity, and ease of operation.

[0003] However, a traditional spiral sand separator consists of a sedimentation tank with an approximately rectangular upper section and a sand-lifting spiral. For example... Figures 1 to 4 As shown, the sand-water mixture enters the sedimentation zone 13 through the inlet 11. The settled sand and gravel fall into the U-shaped trough 16 below the sedimentation zone 13, and the screw 12, driven by a reduction motor, discharges the sand and gravel out of the spiral sand-water separator. The wastewater, after sand and gravel removal, is discharged from the sand-water separator through the overflow trough 15. A guide plate 14 is provided at the bottom of the inlet 11 to prevent disturbance of the water flow in the bottom tank. When there are many impurities in the sand-water mixture, the impurities easily accumulate near the guide plate 14, causing blockage of the inlet pipe.

[0004] Firstly, due to the simple flow guidance design within the rectangular settling tank, the effective settling zone occupies only a small portion. The effective residence time of the fluid inside the settling tank is short, making short-circuiting prone to occur, resulting in unsatisfactory settling of fine-particle silt and sand. Simultaneously, the internal structure is prone to localized turbulence, which intensifies internal mixing, causing initially separated sand particles to re-mix into the clear liquid, further reducing the separation efficiency. For these reasons, traditional sand-water separators have large settling zones and require a large footprint, but can only separate larger particles, such as silt and sand particles larger than 200 micrometers.

[0005] With continuous advancements in sand removal technology, high-efficiency grit chambers can settle even smaller particles of silt, such as 75-micron silt. However, this increases the amount of fine silt in the influent to the sand separator. If a traditional sand separator is used, insufficient hydraulic conditions prevent the fine silt from settling properly, resulting in a significant portion overflowing with the effluent and reducing the overall efficiency of the high-precision sand removal system. Furthermore, high-precision grit chambers increase the amount of organic matter and sludge in the sand-water mixture. Some of this organic matter and sludge deposits in the sand separator, forming organic sludge that coats the sand particles. This prevents the sand separator from removing any silt or from removing only sludge, hindering its normal operation. To meet the demands of high-precision sand removal, it is also necessary to address the impact of organic sludge on the separated silt particles.

[0006] Therefore, it is necessary to improve the traditional sand-water separator to enhance its efficiency in removing fine sand particles, so that it can meet the needs of high-precision sand removal. Utility Model Content

[0007] This invention provides a high-precision fine-particle mud-sand separator to improve existing sand-water separators and solve the above-mentioned technical problems.

[0008] This invention provides a high-precision fine-particle silt separator, comprising a flow stabilizer, a separation chamber, and a sand lifting assembly. The flow stabilizer has a tangential inlet on its side wall for introducing a sand-water mixture into it; the flow stabilizer also has an underflow outlet at its bottom; the flow stabilizer concentrates the sand-water mixture, ensuring the flow rate entering the separation chamber is 30-70% of the initial flow rate. The separation chamber has a tangential inlet connected to the underflow outlet of the flow stabilizer, for introducing the concentrated sand-water mixture into it; the separation chamber has a sedimentation outlet at its bottom; the separation chamber settles fine-particle silt with a particle size greater than 75 micrometers. The sand lifting assembly is inclined at the bottom of the separation chamber, and has a sand lifting channel with an inlet at its bottom and a sand outlet on its lower top surface. The sand lifting assembly separates the settled fine-particle silt and transports it outside the system.

[0009] The high-precision fine-particle sediment separator provided by this utility model further includes a water flow diverter, which has a water flow diverter inlet and a water flow diverter outlet. The water flow diverter inlet is connected to the underflow outlet of the flow stabilizer, and the water flow diverter outlet is connected to the tangential inlet of the separation box. The water flow diverter is used to connect the underflow outlet of the flow stabilizer and the tangential inlet of the separation box, and to control the underflow flow of the flow stabilizer according to the actual needs on site.

[0010] According to the present invention, a high-precision fine-particle mud and sand separator includes a sedimentation separation zone. The upper part of the sedimentation separation zone is cylindrical, and the lower part is conical. The tangential inlet of the separation zone is located on the side wall of the cylinder, and the sediment outlet is located at the bottom of the conical structure. In the sedimentation separation zone formed by the upper cylinder and the lower cone, water enters tangentially from the side wall, forming a swirling flow, which changes the particle settling from gravity settling to centrifugal settling.

[0011] According to the present invention, a high-precision fine-particle silt and sand separator includes an overflow drainage zone. The overflow drainage zone comprises a left baffle and a right baffle, which are respectively disposed on opposite sides of the top of the sand-lifting assembly. The left and right baffles are connected to the outer wall of the sedimentation separation zone. The left baffle, the right baffle, the outer wall of the sedimentation separation zone, and the sand-lifting assembly together form the overflow drainage zone. The overflow drainage zone is used to discharge the effluent after silt and sand sedimentation. When the influent volume exceeds the maximum limit of the sedimentation separation zone, a portion of the wastewater is diverted to reduce the hydraulic load on the sedimentation separation zone, while also providing gravity sedimentation functionality.

[0012] According to the present invention, a high-precision fine-particle mud and sand separator is provided, wherein a flow guiding component is provided inside the sedimentation separation zone. The flow guiding component is located at the center of the sedimentation separation zone and includes a rod-shaped body, an upper cone, and a lower cone. The bottom of the rod-shaped body is connected to the top of the upper cone, and the bottom of the upper cone is connected to the top of the lower cone. The cross-sectional areas of the bottom of the upper cone and the top of the lower cone are the same. The cone angle of the upper cone is 60-180°, and the cone angle of the lower cone is 30-180°. The function of the flow guiding component is to avoid turbulence and energy loss in the central vortex zone.

[0013] According to the present invention, a high-precision fine-particle sediment separator is provided, wherein an annular water outlet trough is provided at the top of the sedimentation separation zone, the annular water outlet trough is located at the center of the top of the sedimentation separation zone, and the outer side wall of the annular water outlet trough is higher than the inner side wall; an overflow drainage zone is provided with a drainage trough, the annular water outlet trough is connected to the drainage trough, and a water outlet hole is provided on the left baffle or the right baffle, the drainage trough is connected to the water outlet hole. The function of the annular water outlet trough is to ensure uniform water discharge and avoid excessively high local upward flow velocity, which would affect the settling of fine-particle sediment.

[0014] According to the present invention, a high-precision fine-particle mud and sand separator further includes an overflow weir, which is disposed on one side of the drainage trough. The two ends of the overflow weir are connected to a left baffle and a right baffle, respectively, and the height of the overflow weir is higher than the height of the inner wall of the annular outlet trough. When the water level in the separation tank is higher than the overflow weir, a small portion of the water can be discharged from the overflow weir, diverting part of the water in the sedimentation separation zone and reducing the hydraulic load on the sedimentation separation zone.

[0015] According to the present invention, a high-precision fine-particle mud and sand separator is provided, wherein the lower conical structure of the sedimentation separation zone has a backwash port on its side wall, which enters the sedimentation separation zone tangentially; the side wall of the conical structure also has an inspection port. Backwashing can prevent mud and sand with low moisture content from accumulating at the sedimentation outlet, and can also separate organic impurities through fluidization, avoiding the formation of organic slurry that would affect normal sludge discharge.

[0016] According to the present invention, a high-precision fine-particle mud and sand separator is provided, wherein the bottom of the flow stabilizer is provided with an air outlet, the top center of the sedimentation separation zone is provided with a through hole, and the air outlet is connected to the through hole.

[0017] According to the present invention, a high-precision fine-particle mud and sand separator is provided. The sand lifting assembly includes a shell, a liner, a drive component, and a shaftless screw component. The shell is inclinedly disposed at the bottom of the separation box. The shell includes a left side plate, a right side plate, and a connecting plate. The left side plate and the right side plate are connected by the connecting plate to form the sand lifting channel. The connecting plate is an integrally formed part consisting of multiple side plates, the number of which is odd and at least 3. The shaftless screw component is disposed in the sand lifting channel, and the drive component is connected to the shaftless screw component. The liner is located between the shaftless screw component and the shell. The liner has a polygonal cross-section with an odd number of sides, at least 3, and matches the connecting plate. The shaftless screw component and the liner have at least three tangent points, including the tangent point at the center of the bottom of the shaftless screw component. The shaftless screw and the liner form multiple tangent points greater than 3, creating multiple small mud discharge channels between the shaftless screw and the liner. This effectively controls the mud-water backflow speed, prevents fine mud-water from flowing back with the mud slurry, and improves the shaftless screw's ability to transport mud and sand.

[0018] Beneficial effects

[0019] This utility model achieves the following beneficial effects through system and structural improvements to the original sand-water separator:

[0020] This invention enhances the sedimentation function for fine-particle silt and sand, enabling the separation of these particles. Traditional sand-water separators lack a flow stabilizer, hindering initial sand-water separation. Furthermore, gravity sedimentation in traditional separators is limited by tank shape and hydraulic conditions, resulting in large flows of sand-water mixture entering the separator and high hydraulic load, effectively only settling silt and sand particles larger than 200 micrometers. This new invention employs a flow stabilizer to concentrate the sand-water mixture, reducing the amount of water entering the main sedimentation zone. Simultaneously, the main sedimentation zone utilizes a design with tangential sidewall inlet, central flow guidance, and top overflow outlet, fully leveraging gravity and centrifugal force to enhance sedimentation.

[0021] This invention enhances the sand-lifting function for fine-particle silt, enabling the separation of fine-particle silt from the system. After sedimentation, the fine-particle silt still needs to be separated from the system by the sand-lifting component. In traditional sand-lifting mechanisms, there is only one contact point between the sand-lifting screw and the liner, resulting in a large gap between them. The slurry formed by the fine-particle silt has good fluidity and easily flows back into the sedimentation zone through the gap, making it impossible to separate from the system. This invention proposes at least three contact points between the liner and the shaftless screw component. The area of ​​a single gap between the sand-lifting screw and the liner is greatly reduced, decreasing the velocity of the slurry formed by the fine-particle silt, which is beneficial for the fine-particle silt to be discharged from the pool by the sand-lifting component. The smaller gap between the shaftless screw component and the liner results in a lower backflow velocity and allows more silt to accumulate on each screw blade, increasing the screw's silt-transporting capacity at the same rotation speed.

[0022] In actual operation, the sand-water mixture sometimes remains in the sedimentation separation zone for a long time, and some organic matter and mud may accumulate there, forming organic mud. Organic mud increases the viscosity of the sand-water mixture, thus entraining sand particles and making separation difficult. This invention employs methods such as side backwashing to discharge organic matter and mud online during operation, eliminating the adverse effects of organic mud on the separation of fine-particle sand and mud. This invention eliminates the influence of organic mud, enabling the high-precision fine-particle sand and mud separator to operate stably and continuously.

[0023] Thanks to improved hydraulic conditions, although the precision of separating fine-grained mud and sand increased from 200 micrometers to 75 micrometers, the area of ​​the sedimentation zone not only did not increase but actually decreased by 10%. The overall equipment footprint was slightly reduced.

[0024] Because the overflow drainage zone connects the separation sedimentation zone and the sand lifting components, the entire equipment operates at atmospheric pressure. An operating platform is installed on top of the equipment; during operation, opening the top cover allows direct observation of the equipment's condition through the overflow drainage zone, facilitating monitoring and maintenance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a front view of a separator in the prior art;

[0027] Figure 2 This is a left view of a separator in the prior art;

[0028] Figure 3 This is a top view of a separator in the prior art;

[0029] Figure 4 This is a front view of the sand-lifting channel in the prior art;

[0030] Figure 5 This is one of the structural schematic diagrams of the high-precision fine-particle mud and sand separator provided by this utility model;

[0031] Figure 6 This is the second schematic diagram of the high-precision fine-particle mud and sand separator provided by this utility model;

[0032] Figure 7 This is the third schematic diagram of the high-precision fine-particle mud and sand separator provided by this utility model;

[0033] Figure 8 This is a schematic diagram of the internal structure of the separation box provided by this utility model;

[0034] Figure 9 This is a rear view of the sand-lifting assembly provided by this utility model;

[0035] Figure label:

[0036] 10. Separator;

[0037] 11. Inlet; 12. Spiral component; 13. Sedimentation zone; 14. Baffle plate; 15. Overflow tank; 16. U-shaped trough;

[0038] 20. Flow stabilizer; 21. Tangential inlet of flow stabilizer; 22. Underflow outlet of flow stabilizer; 23. Drain port; 24. Overflow port of flow stabilizer;

[0039] 30. Separation tank; 31. Tangential inlet of separation tank; 32. Sediment outlet; 33. Sedimentation separation zone; 331. Cylindrical body; 332. Conical structure; 333. Backwash port; 34. Overflow drainage zone; 341. Left baffle; 342. Right baffle; 35. Flow guiding component; 351. Rod-shaped body; 352. Upper cone; 353. Lower cone; 36. Annular outlet channel; 37. Drainage channel; 38. Overflow weir; 39. Observation port;

[0040] 40. Flow deflector;

[0041] 50. Sand lifting assembly; 51. Housing; 52. Liner; 53. Drive component; 54. Shaftless screw component; 55. Flushing port; 56. Vent port; 57. Sand outlet. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0043] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0044] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0047] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0048] The following is combined with Figures 5-9 This invention describes a high-precision fine-particle mud and sand separator.

[0049] The high-precision fine-particle mud and sand separator provided in this embodiment includes: a flow stabilizer 20, a separation box 30, and a sand lifting assembly 50.

[0050] The separation box 30 is fixed to the bottom surface by a bracket, and there is a gap between the bottom surface of the separation box 30 and the ground, such as... Figure 5 and Figure 6 As shown. The flow stabilizer 20 is installed on top of the separation tank 30, and can be placed on the top surface of the separation tank 30. It is used to concentrate the sand-water mixture and reduce the load on the separation tank 30. The flow stabilizer 20 can be a two-chamber or three-chamber cyclone separator. Specifically, the flow stabilizer 20 has a tangential inlet 21 on its side wall, an overflow port 24 on its top, and an underflow outlet 22 at its bottom. The sand-water mixture enters the flow stabilizer 20 through the tangential inlet 21, where it generates swirling current. Under the action of centrifugal force and gravity, the particles settle, and the supernatant flows out through the overflow port 24; the concentrated sand-water mixture enters the separation tank 30 through the underflow outlet 22. In this embodiment of the invention, the flow ratio of the liquid concentrated by the flow stabilizer 20 and flowing out through the overflow port 24 of the flow stabilizer to the sand-water mixture flowing out through the underflow outlet 22 of the flow stabilizer is 0.4-2.5, which is set according to the actual situation of the project.

[0051] like Figure 5 and Figure 6As shown, the separation box 30 is provided with a tangential inlet 31 and a sedimentation outlet 32 ​​at the bottom. The tangential inlet 31 is connected to the underflow outlet 22 of the stabilizer through a pipeline. The sand-water mixture concentrated by the stabilizer 20 enters the sedimentation separation zone 33 through the underflow outlet 22 of the stabilizer and the tangential inlet 31 of the separation box. A swirling flow is generated in the sedimentation separation zone 33 to increase the length of the particle trajectory in the sedimentation separation zone 33, increase the sedimentation time, and avoid short-circuiting or turbulence. Separation is carried out under the action of centrifugal force and gravity. The separated sedimentation outlet 32 ​​enters the sand lifting component 50.

[0052] It is understood that the pipeline connecting the underflow outlet 22 of the flow stabilizer and the tangential inlet 31 of the separator is a rigid pipeline. To facilitate the connection between the two, this embodiment of the invention provides a flow deflector 40 between the flow stabilizer 20 and the separator. Figure 5 and Figure 7 As shown, the flow diverter 40 has a flow diverter inlet and a flow diverter outlet. The flow diverter inlet is connected to the underflow outlet 22 of the flow stabilizer, and the flow diverter outlet is connected to the tangential inlet 31 of the separation tank, thereby adjusting the flow direction of the sand-water mixture. It should be noted that the flow diverter 40 also has a flow control function to prevent excessive water flow into the separation tank 30. In addition, the flow diverter 40 is also a vortex structure; the concentrated sand-water mixture rotates at high speed in the flow diverter 40, which also promotes the frictional shedding of organic matter attached to the surface of the sand particles. Figure 6 As shown, the separation tank 30 includes a sedimentation separation zone 33, mainly used for solid-liquid separation. The upper part of the sedimentation separation zone 33 is a cylinder 331, and the lower part is a conical structure 332. The tangential inlet 31 of the separation tank is located on the side wall of the cylinder, and the sedimentation mud and sand outlet is located at the bottom of the conical structure 332. The sand-water mixture concentrated by the flow stabilizer 20 enters the sedimentation separation zone 33 through the tangential inlet 31 of the separation tank, forming a swirling gravity sedimentation flow with relatively good hydraulic conditions in the sedimentation separation zone 33. The sand-water mixture first swirls downward and then swirls upward. Most of the mud and sand particles, under the action of gravity and centrifugal force, first concentrate on the inner side of the tank wall and then sink. After entering the conical structure 332 of the main sedimentation zone, they enter the sand lifting component 50 through the sedimentation mud and sand outlet. A small portion of fine mud and sand particles enter the central area of ​​the tank and move upward with the water flow, controlling the surface load. Some mud and sand particles still manage to settle.

[0053] Compared with existing technologies (such as) Figure 1 and Figure 2As shown, the sand-water separator uses a rectangular sedimentation tank. This embodiment of the invention provides a cylindrical cyclone separator with better hydraulic conditions, resulting in good sedimentation effect and reducing dead water zones, short-flow zones, and turbulent zones. This improves the separation accuracy of the sedimentation zone from 200 micrometers to 75 micrometers, meeting the requirements of a high-precision sand removal system. This embodiment of the invention further concentrates the sedimented silt by setting the bottom of the sedimentation separation zone 33 into a conical structure 332, and then transports it to the sand lifting mechanism.

[0054] In this embodiment of the invention, a flow guiding component 35 is provided inside the sedimentation separation zone 33 to guide the water flow and further optimize the internal flow state of the sedimentation separation zone 33.

[0055] In one embodiment, the flow guiding component 35 is located at the center of the sedimentation separation zone 33, that is, the flow guiding component 35 is coaxially arranged with the sedimentation separation zone 33. The flow guiding component 35 includes a rod-shaped body 351, an upper cone, and a lower cone 353, such as... Figure 7 and Figure 8 As shown, the bottom of the rod-shaped body 351 is connected to the top of the upper cone 352, and the top of the upper cone is connected to the top of the lower cone 353, wherein the bottom cross-sectional area of ​​the upper cone is the same as that of the lower cone 353. The main function of the flow guiding component is to reduce the turbulence at the center of the vortex and the energy consumption caused by the turbulence.

[0056] It should be noted that the cone angle of the upper cone is 60-180°, such as 60°, 120°, 180°, etc. The cone angle of the lower cone 353 is 30-180°, such as 30°, 105°, 180°, etc.

[0057] The separation box 30 in this embodiment of the invention also includes an overflow drainage area 34, which can divert the flow when the flow rate is too high. The overflow drainage area 34 includes a left baffle 341 and a right baffle 342, such as... Figure 5 As shown, the left baffle 341 and right baffle 342 are respectively located on opposite sides of the top of the sand lifting assembly 50. The left baffle 341 and right baffle 342 are connected to the outer wall of the sedimentation separation zone 33. The left baffle 341, right baffle 342, the outer wall of the sedimentation separation zone 33, and the sand lifting assembly 50 form an overflow drainage zone 34. The overflow drainage zone 34 has two functions. First, the overflow drainage zone 34 operates at normal pressure. During normal operation, opening the top cover of the overflow drainage zone allows observation of the operation of the sand lifting assembly 50, facilitating maintenance. Second, when the flow rate of the sand-water mixture is too large, the overflow drainage zone 34 can automatically share some of the influent, reducing the hydraulic load on the sedimentation separation zone 33. After further separation in the overflow separation zone, the effluent overflows from the overflow weir 38 to the drainage trough 37.

[0058] In this embodiment of the present invention, an annular water outlet trough 36 is provided at the top of the sedimentation separation zone 33, and the annular water outlet trough 36 is located at the center of the top of the sedimentation separation zone 33. Figure 7 and Figure 8 As shown, the annular effluent tank 36 is coaxially arranged with the sedimentation separation zone 33, and the supernatant separated from the sedimentation separation zone 33 enters the annular effluent tank 36.

[0059] like Figure 8 As shown, the overflow drainage zone 34 is provided with a drainage trough 37, and the annular water outlet trough 36 is connected to the drainage trough 37. The left baffle 341 or the right baffle 342 is provided with a water outlet hole, and the drainage trough 37 is connected to the water outlet hole. The upper clear liquid separated from the sedimentation separation zone 33 is discharged through the annular water outlet trough 36, the drainage trough 37 and the water outlet.

[0060] It should be noted that the outer wall of the annular outlet trough 36 is higher than the inner wall to prevent the upper clear liquid from overflowing.

[0061] Furthermore, the overflow drainage zone 34 is also equipped with an overflow weir 38, which is located on one side of the drainage trough 37. The two ends of the overflow weir 38 are connected to the left baffle 341 and the right baffle 342 respectively, and the height of the overflow weir 38 is higher than the height of the inner wall of the annular outlet trough 36. Only when the inflow is very large, and the water head on the weir on the inner wall of the annular outlet trough rises above the overflow weir, the overflow weir begins to discharge water, diverting part of the flow and ensuring that the hydraulic load of the sedimentation separation zone is not too high.

[0062] During the separation process in the sedimentation separation zone 33, some organic matter or finer-particle mud impurities will settle down and cannot be completely discharged through the sand lifting component 50. Over time, this accumulation may form a viscous organic mud in the sedimentation zone, increasing viscosity, entraining mud and sand particles, and affecting sand discharge efficiency. Therefore, this embodiment of the invention provides a backwash port 333 on the side wall of the conical structure 332 at the lower part of the sedimentation separation zone 33. External water can enter the sedimentation separation zone 33 tangentially through the backwash port 333 to clean the zone and prevent mud and sand from accumulating in the conical structure 332 at the lower part of the sedimentation separation zone 33. In one embodiment, the backwash port 333 is tangential.

[0063] The tapered structure 332 in this embodiment of the invention also has an inspection port on its side wall for easy maintenance by the user.

[0064] In this embodiment of the utility model, the bottom of the flow stabilizer 20 is also provided with an exhaust port 23, and the top center of the sedimentation separation zone 33 is provided with a through hole. The exhaust port 23 and the through hole are connected by a pipeline to facilitate the removal of residues in the flow stabilizer 20.

[0065] An observation port 39 is also provided at the top of the sedimentation separation zone 33, allowing users to easily observe the operation of the sedimentation separation zone 33. Users can also perform internal maintenance through the observation port 39.

[0066] The sand-lifting assembly 50 in this embodiment of the invention includes a housing 51, a liner 52, a drive component 53, and a shaftless screw component 54. The housing 51 is inclinedly disposed at the bottom of the separation tank 30, and has a sand-lifting channel inside, which communicates with the outlet of the settled sludge and sand. Figure 5 and Figure 9 As shown, the housing 51 includes a left side plate, a right side plate, and a connecting plate. The left side plate and the right side plate are connected by the connecting plate to form a U-shaped sand-lifting channel. It should be noted that the connecting plate is an integrally molded part formed by multiple side plates. The number of connecting plates is odd, with a minimum of 3, but also 5, 7, etc. The longitudinal section of the connecting plate is half of a regular polygon, and the number of sides of the regular polygon should be twice an odd number greater than or equal to 3, such as 6, 10, 14, etc. In one embodiment, the left side plate, the right side plate, and the connecting plate are integrally molded parts. It should be noted that the bottom of the left baffle 341 is connected to the top of the left side plate, and the bottom of the right baffle 342 is connected to the top of the right side plate.

[0067] The shaftless screw component 54 is placed inside the sand-lifting channel. The drive component 53 is connected to the shaftless screw component 54. When the drive component 53 is activated, it drives the shaftless screw component 54 to rotate in the sand-lifting channel. Under the action of the screw force, the sand particles below the sand-lifting channel are lifted upward until they reach the sand outlet 57 on the lower surface of the top of the sand-lifting channel and are discharged from the sand outlet 57. The drive component 53 can be a geared motor.

[0068] To improve the rotation of the shaftless spiral component 54, this embodiment of the invention includes a liner 52 between the shaftless spiral component 54 and the housing 51. The liner 52 is made of high-strength, wear-resistant, low-water-absorption polymer sheet, specially processed by a bending machine. Because polymer materials have a certain self-lubricating function, they act like bearings, resulting in good rotational performance. During the spiral lifting process, liquid flows out from the gap between the shaftless spiral component 54 and the liner 52 and falls to the bottom. It should be noted that the liner 52 has a polygonal cross-section with an odd number of sides, at least 3, to match the connecting plate. There are multiple tangent points between the shaftless spiral component 54 and the liner 52, at least 3, but also 5, 7, 9, etc. These tangent points include the tangent point at the center of the bottom of the shaftless spiral.

[0069] like Figure 4 As shown, the liner in the existing sand-lifting assembly has a semi-circular structure that fits snugly against the shell. Because the cross-sectional radius of the shaftless helical element is smaller than the radius of the semi-circular cross-section at the bottom of the liner, the helical element 12 only contacts the liner at the very bottom of the semi-circle, and the gap increases thereafter. Compared to coarse-grained silt, fine-grained silt forms more fluid slurry. Due to the increased gap between the liner and the shaftless helical element, the slurry formed from fine-grained silt is more likely to slip through the gap between the liner and the shaftless helical element and cannot be carried away by the shaftless helical element. This is detrimental to the separation of fine-grained silt and sand, and is only suitable for sand-water separators with lower precision.

[0070] Compared with the prior art, the shaftless spiral component 54 and the liner 52 in this embodiment of the utility model have at least 3 tangent points (the number of tangent points is odd), which can control the gap between the liner 52 and the shaftless spiral component 54. This allows the separated mud and water to flow back to the lower part of the sand lifting channel, while preventing the mud and water from carrying more mud and sand, reducing the loss of fine sand particles during the sand lifting process, and enhancing the separation effect.

[0071] In this embodiment of the invention, the housing 51 is further provided with a rinsing port 55, which communicates with the sand-lifting channel. The rinsing port 55 is used to spray cleaning fluid, such as recycled water, into the sand-lifting channel to rinse the sand-lifting channel and the shaftless screw component 54. In one embodiment, the rinsing port 55 is located above the top side wall of the housing 51. There may be multiple rinsing ports 55, which are spaced apart along the extending direction of the housing 51. The bottom of the housing 51 is also provided with a vent 56, which is located on the lowest surface of the housing 51 to facilitate the discharge of liquid in the sand-lifting channel. For example, wastewater used to clean the sand-lifting channel and the shaftless screw component 54 can flow out from the vent 56.

[0072] Furthermore, the lowest surface of the shell 51 is also provided with a vent 56, which allows for the venting of mud and sand in the sand lifting channel during maintenance, facilitating maintenance. It also helps to discharge the cleaning mixture in the sand lifting channel.

[0073] In this embodiment of the utility model, the flow stabilizer 20, the separator 30, and the water flow deflector 40 are all made of 304 stainless steel sheet welded together. The shaftless spiral component 54 is made of 16Mn or Q345 steel strip rolled into shape by a mold to ensure the straightness, roundness, and coaxiality of the spiral. The connecting pipes of the entire high-precision spiral sand separator are all connected by standard 304 seamless steel pipes to ensure smooth water circuit connection of the entire system.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-precision fine-particle mud and sand separator, characterized in that, A flow stabilizer has a tangential inlet on its side wall for introducing a sand-water mixture into the flow stabilizer; an underflow outlet is provided at the bottom of the flow stabilizer; the flow stabilizer is used to concentrate the sand-water mixture. The separation tank is equipped with a tangential inlet that is connected to the underflow outlet of the flow stabilizer, for feeding the concentrated sand-water mixture into the separation tank; the bottom of the separation tank is equipped with a sedimentation mud and sand outlet; A sand-lifting assembly is inclinedly disposed at the bottom of the separation box. The sand-lifting assembly is provided with a sand-lifting channel. The bottom of the sand-lifting channel is provided with an inlet, and the lower surface of the top of the sand-lifting channel is provided with a sand outlet.

2. The high-precision fine-particle mud and sand separator according to claim 1, characterized in that, It also includes a water flow deflector, which has a water flow deflector inlet and a water flow deflector outlet. The water flow deflector inlet is connected to the underflow outlet of the flow stabilizer, and the water flow deflector outlet is connected to the tangential inlet of the separator.

3. The high-precision fine-particle mud and sand separator according to claim 2, characterized in that, The separation tank includes a sedimentation separation zone, which has a cylindrical upper part and a conical lower part. The tangential inlet of the separation tank is located on the side wall of the cylindrical part, and the sediment outlet is located at the bottom of the conical structure.

4. The high-precision fine-particle mud and sand separator according to claim 3, characterized in that, The separation box also includes an overflow drainage area, which includes a left baffle and a right baffle. The left baffle and the right baffle are respectively disposed on opposite sides of the top of the sand lifting assembly. The left baffle and the right baffle are respectively connected to the outer wall of the sedimentation separation area. The left baffle, the right baffle, the outer wall of the sedimentation separation area and the sand lifting assembly form the overflow drainage area.

5. The high-precision fine-particle mud and sand separator according to claim 3, characterized in that, The sedimentation separation zone is equipped with a flow guiding component located at the center of the sedimentation separation zone. The flow guiding component includes a rod-shaped body, an upper cone, and a lower cone. The bottom of the rod-shaped body is connected to the top of the upper cone, and the bottom of the upper cone is connected to the top of the lower cone. The bottom of the upper cone and the top of the lower cone have the same cross-sectional area. The cone angle of the upper cone is 60-180°, and the cone angle of the lower cone is 30-180°.

6. The high-precision fine-particle mud and sand separator according to claim 4, characterized in that, The top of the sedimentation separation zone is provided with an annular water outlet trough, which is located at the center of the top of the sedimentation separation zone, and the outer side wall of the annular water outlet trough is higher than the inner side wall. The overflow drainage area is provided with a drainage trough, the annular water outlet trough is connected to the drainage trough, and the left baffle or the right baffle is provided with a water outlet hole, which is connected to the drainage trough.

7. The high-precision fine-particle mud and sand separator according to claim 6, characterized in that, It also includes an overflow weir, which is located on one side of the drainage trough. The two ends of the overflow weir are connected to the left baffle and the right baffle, respectively. The height of the overflow weir is higher than the height of the inner wall of the annular outlet trough.

8. The high-precision fine-particle mud and sand separator according to claim 3, characterized in that, The lower conical structure of the sedimentation separation zone is provided with a backwash port on its sidewall, and the backwash port enters the sedimentation separation zone tangentially. The sidewalls of the conical structure are also provided with inspection ports.

9. The high-precision fine-particle mud and sand separator according to claim 3, characterized in that, The bottom of the flow stabilizer is provided with an air vent, and the top center of the sedimentation separation zone is provided with a through hole, and the air vent is connected to the through hole.

10. The high-precision fine-particle mud and sand separator according to claim 1, characterized in that, The sand lifting assembly includes a shell, a liner, a drive unit, and a shaftless screw. The shell is inclinedly disposed at the bottom of the separation box. The shell includes a left side plate, a right side plate, and a connecting plate. The left side plate and the right side plate are connected by the connecting plate to form the sand lifting channel. The connecting plate is an integrally molded part formed by multiple side plates. The number of side plates is odd, and the number of side plates is at least 3. The shaftless spiral component is disposed in the sand lifting channel, and the driving component is connected to the shaftless spiral component; the liner is located between the shaftless spiral component and the housing, the liner has a polygonal cross-section with an odd number of sides, at least 3 sides, and matches the connecting plate; the shaftless spiral component and the liner have at least three tangent points, including the tangent point at the center of the bottom of the shaftless spiral.

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