High precision fine particle sand separator

Abstract

The present invention relates to the technical field of separators, and provides a high-precision fine-grained mud-sand separator, comprising: a flow stabilizer, a separation box and a sand lifting assembly, wherein the side wall of the flow stabilizer is provided with a flow stabilizer tangential inlet, and the flow stabilizer tangential inlet is used to input a sand-water mixture into the flow stabilizer; the bottom of the flow stabilizer is provided with a flow stabilizer bottom flow outlet; the flow stabilizer is used to concentrate the sand-water mixture; the separation box is provided with a separation box tangential inlet, which is connected to the flow stabilizer bottom flow outlet, and is used to input the concentrated sand-water mixture into the separation box; the bottom of the separation box is provided with a sedimentation mud-sand outlet; the sand lifting assembly is obliquely arranged at the bottom of the separation box, and 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 top lower surface of the sand lifting channel is provided with a sand outlet. The embodiment of the present invention reduces the hydraulic load of the separation box by adding a flow stabilizer; by arranging the separation box tangential inlet on the separation box, the length of the particle running track in the separation box is increased, the sedimentation time is extended, and short flow or turbulence is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of separators, and in particular to a high-precision fine-grained mud-sand separator. Background Art

[0002] In industrial production, especially in the fields of sand and stone processing, building materials manufacturing, mining and coal processing, solid-liquid separation is a crucial process. As a key equipment to achieve this goal, the sand-water separator has the main function of effectively separating the suspension containing a large amount of sand and other solid impurities (such as mud, wastewater, etc.) to reduce the sand content in the liquid, thereby improving the efficiency of the subsequent processing process and product quality. Among them, the spiral sand-water separator has been widely used in the above industries due to its compact structure, large processing capacity and easy operation.

[0003] However, the traditional spiral sand-water separator consists of a sedimentation box with an upper portion approximately rectangular and a sand lifting spiral. Figures 1 to 4 As shown, the sand-water mixture enters the sedimentation area 13 from the water inlet 11, and the precipitated sand and gravel fall into the U-shaped groove 16 below the sedimentation area 13, and the spiral member 12 is driven by the driving reduction motor to remove the sand and gravel from the spiral sand-water separator, and the sewage after the sand and gravel are removed is discharged from the sand-water separator through the overflow tank 15. A guide plate 14 is provided at the bottom of the water inlet 11 to prevent the inflow from disturbing the water flow in the bottom water tank. When there are many impurities in the sand-water mixture, the impurities are easily accumulated near the guide plate 14, causing the water inlet pipe to be blocked.

[0004] First, since the flow diversion design in the rectangular sedimentation box is relatively simple, the effective sedimentation area only occupies a small part of it, and the effective residence time of the fluid flow inside the sedimentation box is short, which is prone to short-circuiting and has an unsatisfactory sedimentation effect on fine-grained mud and sand. At the same time, the internal structure is prone to local turbulence, which will aggravate the mixing effect inside the fluid, causing the sand particles that have been initially separated to be re-mixed into the clear liquid, further reducing the separation effect. For these reasons, the sedimentation area of ​​the traditional sand-water separator is large in size and occupies a large area, but can only separate larger particles, such as mud and sand particles larger than 200 microns.

[0005] With the continuous advancement of sand removal technology, efficient sand settling tanks can precipitate smaller particles of mud and sand, such as 75 micron mud and sand. At this time, the fine-grained mud and sand in the water inlet of the sand and water separator increases. If a traditional sand and water separator is used, due to the poor hydraulic conditions, the fine-grained mud and sand cannot be fully settled, and a large part of it overflows with the outlet water, reducing the overall sand removal efficiency of the high-precision sand removal system. On the other hand, the high-precision sand settling system increases the organic matter and mud in the sand and water mixture. Some of the organic matter and mud will be deposited in the sand and water separator to form organic mud, which will wrap the sand particles, making the sand and water separator either unable to extract any mud and sand, or the mud and sand extracted are all mud and cannot operate normally. In order to meet the needs of high-precision sand removal, it is also necessary to solve the impact of organic mud on the separation of mud and sand particles.

[0006] Therefore, it is necessary to improve the traditional sand-water separator to enhance the removal efficiency of fine-grained mud and sand so that it can meet the needs of high-precision sand removal. Summary of the invention

[0007] The present invention provides a high-precision fine-grain mud-sand separator, which is used to improve the existing sand-water separator to solve the above-mentioned technical problems.

[0008] The present invention provides a high-precision fine-grained mud and sand separator, including 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 to input a sand-water mixture into the flow stabilizer; the bottom of the flow stabilizer is provided with a flow stabilizer bottom flow outlet; the flow stabilizer is used to concentrate the sand-water mixture so that the flow of the sand-water mixture entering the separation box is 30-70% of the initial flow; the separation box is provided with a separation box tangential inlet, which is connected to the flow stabilizer bottom flow outlet, and is used to input the concentrated sand-water mixture into the separation box; the bottom of the separation box is provided with a sedimentation mud and sand outlet; the separation box is used to precipitate fine-grained mud and sand with a particle size greater than 75 microns. The sand lifting assembly is tilted at the bottom of the separation box, and 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 top lower surface of the sand lifting channel is provided with a sand outlet. The sand lifting assembly is used to separate the precipitated fine-grained mud and sand and transport it outside the system.

[0009] According to the present invention, a high-precision fine-grained mud and sand separator further includes a water flow diverter, which is provided with a water flow diverter inlet and a water flow diverter outlet, wherein the water flow diverter inlet is connected to the bottom flow 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 bottom flow outlet of the flow stabilizer and the tangential inlet of the separation box, and control the bottom flow flow of the flow stabilizer according to actual needs on site.

[0010] According to a high-precision fine-particle mud and sand separator provided by the present invention, the separation box includes a sedimentation separation zone, the upper part of the sedimentation separation zone is a cylinder, the lower part is a conical structure, the tangential inlet of the separation box is arranged on the side wall of the cylinder, and the sedimentation mud and sand outlet is arranged 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 to form a vortex, so that the particle sedimentation changes from gravity sedimentation to centrifugal sedimentation.

[0011] According to a high-precision fine-grained mud and sand separator provided by the present invention, the separation box also includes an overflow drainage area, the overflow drainage area includes a left baffle and a right baffle, the left baffle and the right baffle are respectively arranged on opposite sides of the top of the sand lifting component, the left baffle and the right baffle are respectively connected to the outer wall surface of the sedimentation separation area, and the left baffle, the right baffle, the outer wall surface of the sedimentation separation area and the sand lifting component are surrounded to form an overflow drainage area. The overflow drainage area is used to discharge the effluent after the mud and sand are precipitated. When the water inflow exceeds the maximum limit of the sedimentation separation area, part of the sewage is diverted to reduce the hydraulic load of the sedimentation separation area, and it also has a gravity sedimentation function.

[0012] According to a high-precision fine-grained mud-sand separator provided by the present invention, a flow guide component is provided inside the sedimentation separation zone, the flow guide component is located at the center of the sedimentation separation zone, the flow guide component comprises 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, 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°. The function of the flow guide component is to avoid turbulence and energy loss in the central vortex zone.

[0013] According to a high-precision fine-grained mud and sand separator provided by the present invention, the top of the sedimentation separation zone is provided with an annular water outlet trough, the annular water outlet trough is arranged at the top center of the sedimentation separation zone, and the outer wall of the annular water outlet trough is higher than the inner wall; the overflow drainage zone is provided with a drainage trough, the annular water outlet trough is connected to the drainage trough, the left baffle plate or the right baffle plate is provided with a water outlet hole, the drainage trough is connected to the water outlet hole. The function of the annular water outlet trough is to make the water outlet uniform, avoid excessive local rising flow velocity, and affect the sedimentation of fine-grained mud and sand.

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

[0015] According to a high-precision fine-grained mud and sand separator provided by the present invention, a backwash port is provided on the side wall of the conical structure at the bottom of the sedimentation separation zone, and the backwash port enters the sedimentation separation zone tangentially; the side wall of the conical structure is also provided with an inspection port. Backwashing can prevent mud and sand with low water content from accumulating at the sedimentation mud and sand outlet on the one hand, and can separate organic impurities through fluidization to avoid the formation of organic mud and affect normal mud discharge on the other hand.

[0016] According to a high-precision fine-particle mud-sand separator provided by the present invention, a drain port is provided at the bottom of the flow stabilizer, a through hole is provided at the top center of the sedimentation separation zone, and the drain port is connected to the through hole.

[0017] According to a high-precision fine-particle mud and sand separator provided by the present invention, the sand lifting assembly includes a shell, a lining plate, a driving member and a shaftless screw, the shell is tilted at the bottom of the separation box, the shell includes a left plate, a right plate and a connecting plate, the left plate and the right plate are transitionally connected by the connecting plate to form the sand lifting channel; the connecting plate is an integrally formed part formed by a plurality of side plates, the number of the side plates is an odd number, and the number of the side plates is at least 3; the shaftless screw is arranged in the sand lifting channel, and the driving member is connected to the shaftless screw; the lining plate is located between the shaftless screw and the shell, the lining plate cross-section is a polygon, the number of sides is an odd number, the number of sides is at least 3, and it matches the connecting plate, the shaftless screw and the lining plate have at least three tangent points, and the tangent points include the tangent point at the bottom center of the shaftless screw. A number of tangent points greater than 3 are formed between the shaftless screw and the liner, and a number of small mud discharge channels are formed between the shaftless screw and the liner, which can effectively control the mud and water backflow speed, prevent fine particles of mud and sand from flowing back with the mud and water, and improve the ability of the shaftless screw to transport mud and sand.

[0018] Beneficial Effects The present invention achieves the following beneficial effects by improving the system and structure of the original sand-water separator: Enhance the sedimentation function of fine-grained mud and sand, and be able to precipitate and separate fine-grained mud and sand; because the traditional sand-water separator does not have a flow stabilizer, it cannot perform preliminary separation of sand and water. At the same time, the sedimentation separator adopts gravity sedimentation, which is limited by the pool type and has poor hydraulic conditions, resulting in a large flow of sand-water mixture entering the sand-water separator, and the hydraulic load is high, and only mud and sand particles larger than 200 microns can be effectively precipitated. The present invention adopts a flow stabilizer to concentrate the sand-water mixture and reduce the amount of water entering the main sedimentation area. At the same time, the main sedimentation area adopts a design of tangential water inlet on the side wall, center diversion, and top overflow water outlet, which makes full use of gravity and centrifugal force and enhances the sedimentation function.

[0019] The present invention enhances the sand lifting function of fine-grained mud and sand, and can separate the fine-grained mud and sand out of the system; after the fine-grained mud and sand are precipitated, they need to be separated out of the system by the sand lifting assembly. In the traditional sand lifting mechanism, there is only one contact point between the sand lifting spiral and the liner, and the gap between the sand lifting spiral and the liner is large. The mortar formed by the fine-grained mud and sand has good fluidity and is easy to flow back from the gap to the sedimentation area and cannot be separated from the system. The present invention proposes that there are at least three contact points between the liner and the shaftless spiral element, and the area of ​​a single gap between the sand lifting spiral and the liner is greatly reduced, and the speed of the mortar formed by the fine-grained mud and sand is reduced, which is conducive to the fine-grained mud and sand being discharged out of the pool by the sand lifting assembly. The gap between the shaftless spiral element and the liner is small, and the reflux speed is low. It can also make more mud and sand materials accumulate on each spiral blade, and at the same rotation speed, improve the ability of the spiral to transport mud and sand.

[0020] In actual operation, in the sedimentation and separation zone, the sand-water mixture sometimes stays for a long time, and some organic matter and mud may accumulate in the sedimentation and separation zone to form organic mud. The organic mud will increase the viscosity of the sand-water mixture, thereby entraining mud and sand particles and making it difficult to separate. The present invention adopts lateral backwashing and other methods, and can discharge organic matter and mud online during operation, eliminating the adverse effects of organic mud on fine-grained mud and sand separation. The present invention eliminates the influence of organic mud, so that the high-precision fine-grained mud and sand separator can operate stably and continuously.

[0021] Due to the improvement of hydraulic conditions, although the accuracy of separating fine-grained mud and sand has been increased from 200 microns to 75 microns, the area of ​​the sedimentation zone has not increased but has been reduced by 10%. The overall equipment footprint has been slightly reduced.

[0022] Since the overflow drainage area is used to connect the separation sedimentation area and the sand lifting component, the equipment as a whole is operated at normal pressure. An operating platform is set on the top of the equipment. When it is running, the top cover can be opened to observe the equipment directly from the overflow drainage area, which is convenient for observation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a front view of a separator in the prior art; Figure 2 It is a left side view of a separator in the prior art; Figure 3 is a top view of a separator in the prior art; Figure 4 It is the main view of the sand lifting channel in the prior art; Figure 5 This is one of the structural schematic diagrams of the high-precision fine-grained mud-sand separator provided by the present invention; Figure 6 This is the second structural schematic diagram of the high-precision fine-grained mud-sand separator provided by the present invention; Figure 7 This is the third structural schematic diagram of the high-precision fine-grained mud-sand separator provided by the present invention; Figure 8 It is a schematic diagram of the internal structure of the separation box provided by the present invention; Fig. 9 is a rear view of the sand lifting assembly provided by the present invention; Reference numerals: 10. Separator; 11. Water inlet; 12. Screw; 13. Sedimentation area; 14. Guide plate; 15. Overflow trough; 16. U-shaped trough; 20. Flow stabilizer; 21. Tangential inlet of flow stabilizer; 22. Bottom flow outlet of flow stabilizer; 23. Drain port; 24. Overflow port of flow stabilizer; 30. Separation box; 31. Tangential inlet of separation box; 32. Sedimentation mud and sand outlet; 33. Sedimentation separation area; 331. Cylinder; 332. Conical structure; 333. Backwash port; 34. Overflow drainage area; 341. Left baffle; 342. Right baffle; 35. Flow guide component; 351. Rod-shaped body; 352. Upper cone; 353. Lower cone; 36. Annular water outlet trough; 37. Drainage trough; 38. Overflow weir; 39. Observation port; 40. Water flow diverter; 50. Sand lifting assembly; 51. Shell; 52. Liner; 53. Driving member; 54. Shaftless spiral member; 55. Flushing port; 56. Drain port; 57. Sand outlet. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the examples of various specific processes and materials provided by the present invention, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0031] Combine the following Figure 5-Figure 9 The high-precision fine-particle mud and sand separator of the present invention is described.

[0032] The high-precision fine-grained mud-sand separator provided in the embodiment of the present invention includes: a flow stabilizer 20 , a separation box 30 and a sand lifting assembly 50 .

[0033] 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. Figure 5 and Figure 6 As shown. The flow stabilizer 20 is installed on the top of the separation box 30 and can be placed on the top surface of the separation box 30 to concentrate the sand-water mixture and reduce the load of the separation box 30. The flow stabilizer 20 can be a cyclone separator with a two-chamber or three-chamber structure. Specifically, the side wall of the flow stabilizer 20 is provided with a flow stabilizer tangential inlet 21, the top of the flow stabilizer 20 is provided with a flow stabilizer overflow port 24, and the bottom of the flow stabilizer 20 is also provided with a flow stabilizer bottom flow outlet 22. The sand-water mixture enters the flow stabilizer 20 through the flow stabilizer tangential inlet 21, and a cyclone is generated in the flow stabilizer 20. Under the action of centrifugal force and gravity, the particles sink, and the upper clear liquid flows out through the flow stabilizer overflow port 24; the concentrated sand-water mixture enters the separation box 30 through the flow stabilizer bottom flow outlet 22. In the embodiment of the present invention, the flow ratio of the liquid flowing out of the flow stabilizer overflow port 24 after concentration by the flow stabilizer 20 and the sand-water mixture flowing out of the flow stabilizer bottom flow outlet 22 is 0.4-2.5, which is set according to the actual situation of the project.

[0034] like Figure 5 and Figure 6 As shown, the separation box 30 is provided with a separation box tangential inlet 31, and a sedimentation mud and sand outlet 32 ​​is provided at the bottom of the separation box 30. The separation box tangential inlet 31 is connected with the stabilizer bottom flow outlet 22 through a pipeline. The sand and water mixture concentrated by the stabilizer 20 enters the sedimentation separation area 33 through the stabilizer bottom flow outlet 22 and the separation box tangential inlet 31, and a vortex is generated in the sedimentation separation area 33 to increase the running track length of the particles in the sedimentation separation area 33, increase the sedimentation time, avoid short flow or turbulence, and separate under the action of centrifugal force and gravity, wherein the separated sedimentation mud and sand outlet 32 ​​enters the sand lifting component 50.

[0035] It is understandable that the pipeline used to connect the bottom flow outlet 22 of the flow stabilizer and the tangential inlet 31 of the separation box is a hard pipeline. To facilitate the connection between the two, the embodiment of the present invention sets a water flow diverter 40 between the flow stabilizer 20 and the separator. Figure 5 and Figure 7As shown, the water flow diverter 40 is provided with a water flow diverter inlet and a water flow diverter outlet. The water flow diverter inlet is connected to the bottom flow outlet 22 of the flow stabilizer, and the water flow diverter outlet is connected to the tangential inlet 31 of the separation box, so as to adjust the flow direction of the sand-water mixture. It should be noted that the water flow diverter 40 also has a flow control function to prevent excessive water flow from entering the separation box 30. In addition, the water flow diverter 40 is also a cyclone structure. The concentrated sand-water mixture rotates at a high speed in the water flow diverter 40, which also has the effect of promoting the friction and shedding of organic matter attached to the surface of mud and sand particles. Figure 6 As shown, the separation box 30 includes a sedimentation separation zone 33, which is 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 box is arranged on the side wall of the cylinder, and the sedimentation mud and sand port is arranged 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 box, and forms a cyclonic gravity sedimentation flow state 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 are first concentrated on the inner side of the pool wall under the action of gravity and centrifugal force, and then sink. After entering the conical structure 332 of the main sedimentation zone, they enter the sand lifting assembly 50 through the sedimentation mud and sand port. A small part of the fine mud and sand enters the central area of ​​the pool, moves upward with the water flow, controls the surface load, and still some mud and sand particles can settle down.

[0036] Compared with the prior art (such as Figure 1 and Figure 2 The sand-water separator adopts a rectangular sedimentation box. The embodiment of the present invention provides a cylindrical cyclone separator with good hydraulic conditions, good sedimentation effect, reduced dead water area, short flow area, turbulent area, so that the separation accuracy of the sedimentation area can be increased from 200 microns to 75 microns, meeting the needs of supporting high-precision sand removal system. The embodiment of the present invention further concentrates the sediment by setting the bottom of the sedimentation separation area 33 as a conical structure 332, and transports it to the sand lifting mechanism.

[0037] In the embodiment of the present invention, a flow guide component 35 is provided inside the sedimentation and separation zone 33 to guide the water flow and further optimize the internal flow state of the sedimentation and separation zone 33 .

[0038] In one embodiment, the flow guide component 35 is located at the center of the sedimentation and separation zone 33, that is, the flow guide component 35 is coaxially arranged with the sedimentation and separation zone 33. The flow guide component 35 includes a rod-shaped body 351, an upper cone and a lower cone 353. Figure 7 and Figure 8As 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 the bottom cross-sectional area of ​​the lower cone 353. The main function of the guide component is to weaken the turbulence in the center of the vortex and the energy consumption caused by the turbulence.

[0039] 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.

[0040] The separation box 30 in the embodiment of the present invention further includes an overflow drainage area 34, which can achieve flow diversion when the flow rate is too large. The overflow drainage area 34 includes a left baffle 341 and a right baffle 342. Figure 5 As shown, the left baffle 341 and the right baffle 342 are arranged on opposite sides of the top of the sand lifting assembly 50, and the left baffle 341 and the right baffle 342 are respectively connected to the outer wall surface of the sedimentation separation zone 33, and the left baffle 341, the right baffle 342, the outer wall surface of the sedimentation separation zone 33 and the sand lifting assembly 50 are surrounded to form an overflow drainage area 34. The overflow drainage area 34 has two functions. First, the overflow drainage area 34 is operated at normal pressure. During normal operation, the top cover of the overflow drainage area can be opened to observe the operation of the sand lifting assembly 50, which is convenient for maintenance. In addition, when the flow rate of the sand-water mixture is too large, the overflow drainage area 34 can automatically share part of the inflow, reduce the hydraulic load of the sedimentation separation zone 33, and the mud and sand particles can be further separated in the overflow separation area, and the outflow overflows from the overflow weir 38 to the drainage trough 37.

[0041] In the embodiment of the present invention, an annular water outlet trough 36 is provided at the top of the sedimentation and separation zone 33. The annular water outlet trough 36 is provided at the top center of the sedimentation and separation zone 33. Figure 7 and Figure 8 As shown, the annular water outlet trough 36 is coaxially arranged with the sedimentation separation zone 33 , and the upper clear liquid separated by the sedimentation separation zone 33 enters the annular water outlet trough 36 .

[0042] like Figure 8 As shown, the overflow drainage area 34 is provided with a drainage groove 37, the annular water outlet groove 36 is connected to the drainage groove 37, the left baffle plate 341 or the right baffle plate 342 is provided with a water outlet hole, the drainage groove 37 is connected to the water outlet hole, and the upper clear liquid separated by the sedimentation separation area 33 is discharged through the annular water outlet groove 36, the drainage groove 37 and the water outlet.

[0043] It should be noted that the outer wall of the annular water outlet groove 36 is higher than the inner wall to prevent the upper clear liquid from overflowing.

[0044] Furthermore, the overflow drainage area 34 is also provided with an overflow weir 38, which is provided on one side of the drainage trough 37. The two ends of the overflow weir 38 are respectively connected to the left baffle 341 and the right baffle 342, 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 water inflow is large, the water head on the weir on the inner wall of the annular outlet trough rises to exceed the overflow weir, and the overflow weir starts to discharge water, diverting part of the flow, to ensure that the hydraulic load of the sedimentation separation area is not too high.

[0045] 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 assembly 50. Long-term accumulation may form viscous organic mud in the sedimentation zone, increase viscosity, entrain mud and sand particles, and affect sand discharge efficiency. Based on this, the embodiment of the present invention sets a backwash port 333 on the side wall of the conical structure 332 at the lower part of the sedimentation separation zone 33, and the external water source can enter the sedimentation separation zone 33 tangentially through the backwash port 333 to clean the sedimentation separation zone 33 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 a tangential port.

[0046] The side wall of the conical structure 332 in the embodiment of the present invention is also provided with an inspection port to facilitate maintenance by the user.

[0047] The bottom of the flow stabilizer 20 in the embodiment of the present invention is further provided with an emptying port 23 , and the top center of the sedimentation separation zone 33 is provided with a through hole, and the emptying port 23 is connected to the through hole through a pipeline, so as to facilitate the removal of residues in the flow stabilizer 20 .

[0048] An observation port 39 is also provided on the top of the sedimentation and separation zone 33, so that the user can observe the operation of the sedimentation and separation zone 33. The user can also inspect the interior through the observation port 39.

[0049] The sand lifting assembly 50 in the embodiment of the present invention comprises a housing 51, a lining plate 52, a driving member 53 and a shaftless screw member 54. The housing 51 is tilted at the bottom of the separation box 30, and a sand lifting channel is provided in the housing 51, and the sand lifting channel is connected to the sediment sand outlet. Figure 5 and Fig. 9 As shown, the shell 51 includes a left side plate, a right side plate and a connecting plate, and the left side plate and the right side plate are transitionally connected by the connecting plate to form a sand lifting channel of a U-shaped structure. It should be noted that the connecting plate is an integrally formed part formed by the surrounding of multiple side plates, and the number of connecting plates is an odd number, the number of connecting plates is at least 3, and can also be 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 an integrally formed part. 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.

[0050] The shaftless screw 54 is placed in the sand lifting channel, and the driving member 53 is connected to the shaftless screw 54. The driving member 53 is started, driving the shaftless screw 54 to rotate in the sand lifting channel. Under the action of the spiral force, the sand below the sand lifting channel is lifted upward until it reaches the sand outlet 57 on the lower surface of the top of the sand lifting channel and is discharged from the sand outlet 57. The driving member 53 can be a reduction motor.

[0051] In order to improve the rotation of the shaftless screw 54, a lining plate 52 is provided between the shaftless screw 54 and the shell 51 in the embodiment of the present invention. The lining plate 52 is formed by special treatment of a high-strength, wear-resistant, and low-water-absorption polymer sheet material by a folding machine. Since the polymer material has a certain self-lubricating function, it is equivalent to a bearing and has a good rotation effect. During the spiral lifting process, the liquid flows out from the gap between the shaftless screw 54 and the lining plate 52 and falls to the bottom. It should be noted that the cross-section of the lining plate 52 is a polygon with an odd number of sides, at least 3, which matches the connecting plate. There are multiple tangent points between the shaftless screw 54 and the lining plate 52, at least 3, and can also be 5, 7, 9, etc. The tangent points include the tangent point at the center of the bottom of the shaftless screw.

[0052] like Figure 4 As shown, the liner in the sand lifting assembly in the prior art is a semicircular structure, which fits with the shell. Since the cross-sectional radius of the shaftless spiral is smaller than the radius of the semicircular cross-sectional area at the bottom of the liner, the spiral 12 and the liner are only in contact at the bottom of the semicircle, and then the gap becomes larger and larger. Compared with coarse-grained mud and sand, the mortar formed by fine-grained mud and sand has stronger fluidity. As the gap between the liner and the shaftless spiral increases, the mortar formed by fine-grained mud and sand is more likely to slide from the gap between the liner and the shaftless spiral, and cannot be taken away by the shaftless spiral, which is not conducive to the separation of fine-grained mud and sand, and can only be applied to sand-water separators with lower precision.

[0053] Compared with the prior art, the shaftless screw 54 in the embodiment of the present invention has at least three tangent points (the tangent points are an odd number) with the liner 52, which can control the gap between the liner 52 and the shaftless screw 54, allowing the separated muddy water to flow back to the lower part of the sand lifting channel, while preventing the muddy water from carrying more muddy sand, reducing the loss of fine sand particles during the sand lifting process, and enhancing the separation effect.

[0054] In the embodiment of the present invention, the housing 51 is further provided with a flushing port 55, which is connected to the sand lifting channel. The flushing port 55 is used to spray a cleaning liquid, such as recycled water, into the sand lifting channel to flush the sand lifting channel and the shaftless spiral 54. In one embodiment, the flushing port 55 is provided above the top side wall of the housing 51. There can be multiple flushing ports 55, and the multiple flushing ports 55 are arranged at intervals along the extension direction of the housing 51. The bottom of the housing 51 is also provided with a drain port 56, which is provided at the lowest surface of the housing 51 to facilitate the discharge of liquid in the sand lifting channel, such as sewage for cleaning the sand lifting channel and the shaftless spiral 54 can flow out from the drain port 56.

[0055] Furthermore, the lowest surface of the housing 51 is also provided with a vent 56, through which mud and sand in the sand lifting channel can be emptied during maintenance, which is convenient for maintenance. In addition, it is also beneficial to discharge the cleaning mixture in the sand lifting channel.

[0056] The flow stabilizer 20, separation box 30 and water flow diverter 40 in the embodiment of the present invention are all formed by welding 304 plates, and the shaftless spiral part 54 is formed by rolling 16Mn or Q345 plate strip through a mold to ensure the straightness, roundness and coaxiality of the spiral. The connecting pipelines of the whole set of high-precision spiral sand and water separators are all connected by standard 304 seamless steel pipes to achieve smooth water connection of the whole system.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision fine-grained mud and sand separator, characterized in that: A flow stabilizer, wherein a tangential inlet of the flow stabilizer is provided on the side wall of the flow stabilizer, and the tangential inlet of the flow stabilizer is used to input a sand-water mixture into the flow stabilizer; a bottom flow outlet of the flow stabilizer is provided at the bottom of the flow stabilizer; the flow stabilizer is used to concentrate the sand-water mixture; A separation box is provided with a separation box tangential inlet, which is connected to the bottom flow outlet of the flow stabilizer and is used to input the concentrated sand-water mixture into the separation box; a sedimentation mud and sand outlet is provided at the bottom of the separation box; A sand lifting component is tilted at the bottom of the separation box, the sand lifting component is provided with a sand lifting channel, the bottom of the sand lifting channel is provided with an inlet, and the top lower surface of the sand lifting channel is provided with a sand outlet.

2. The high-precision fine-grained mud-sand separator according to claim 1 is characterized in that: It also includes a water flow diverter, which is provided with a water flow diverter inlet and a water flow diverter outlet. The water flow diverter inlet is connected with the bottom flow outlet of the flow stabilizer, and the water flow diverter outlet is connected with the tangential inlet of the separation box.

3. The high-precision fine-grained mud-sand separator according to claim 2 is characterized in that: The separation box comprises a sedimentation separation zone, the upper part of which is a cylinder and the lower part is a conical structure. The tangential inlet of the separation box is arranged on the side wall of the cylinder, and the sedimentation mud and sand outlet is arranged at the bottom of the conical structure.

4. The high-precision fine-grained mud-sand separator according to claim 3 is 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 arranged 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 surface of the sedimentation separation area. The left baffle, the right baffle, the outer wall surface of the sedimentation separation area and the sand lifting assembly are surrounded to form an overflow drainage area.

5. The high-precision fine-grained mud-sand separator according to claim 3 is characterized in that: A flow guide component is provided inside the sedimentation and separation zone, and the flow guide component is located at the center of the sedimentation and separation zone; the flow guide 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, the bottom of the upper cone is connected to the top of the lower cone, and the cross-sectional area of ​​the bottom of the upper cone is the same as that of the top of the lower cone; 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-grained mud-sand separator according to claim 4, characterized in that: The top of the sedimentation and separation zone is provided with an annular water outlet groove, the annular water outlet groove is arranged at the top center of the sedimentation and separation zone, and the outer side wall of the annular water outlet groove is higher than the inner side wall; The overflow drainage area is provided with a drainage groove, the annular water outlet groove is communicated with the drainage groove, the left baffle plate or the right baffle plate is provided with a water outlet hole, and the drainage groove is communicated with the water outlet hole.

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

8. The high-precision fine-grained mud-sand separator according to claim 1, characterized in that: A backwash port is provided on the side wall of the conical structure at the bottom of the sedimentation and separation zone, and the backwash port enters the sedimentation and separation zone tangentially; The side wall of the conical structure is also provided with an inspection opening.

9. The high-precision fine-grained mud-sand separator according to claim 2, characterized in that: A drain port is provided at the bottom of the flow stabilizer, a through hole is provided at the top center of the sedimentation separation zone, and the drain port is communicated with the through hole.

10. The high-precision fine-grained mud-sand separator according to claim 1, characterized in that: The sand lifting assembly comprises a shell, a lining plate, a driving member and a shaftless spiral member, wherein the shell is obliquely arranged at the bottom of the separation box, and the shell comprises a left plate, a right plate and a connecting plate, wherein the left plate and the right plate are transitionally connected through the connecting plate to form the sand lifting channel; the connecting plate is an integrally formed member formed by a plurality of side plates, wherein the number of the side plates is an odd number, and the number of the side plates is at least 3; The shaftless screw is arranged in the sand lifting channel, and the driving member is connected to the shaftless screw; the lining plate is located between the shaftless screw and the shell, and the cross-section of the lining plate is a polygon with an odd number of sides, which is at least 3 and matches the connecting plate. There are at least three tangent points between the shaftless screw and the lining plate, and the tangent points include the tangent point at the center of the bottom of the shaftless screw.

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