Device and process for recycling dense overflow solid materials

Abstract

The invention relates to the technical field of solid-liquid separation in the mineral separation industry, in particular to a dense overflow solid material recycling device and process, the dense overflow solid material recycling device comprises a plurality of sedimentation tanks, height differences exist among the sedimentation tanks, and a sediment recycling mechanism is arranged in each sedimentation tank and used for collecting and conveying solid materials after sediment; a dissociation mechanism is also arranged in the sedimentation tank and is used for dissociating solid materials; and a separation mechanism is arranged on the extraction mechanism, and solid materials can be conveyed and subjected to solid-liquid separation through vibration. By arranging the sedimentation tank, the sediment recovery mechanism, the extraction mechanism and the separation mechanism, continuous operation can be achieved, and the manual cleaning cost is reduced; the extraction mechanism can realize low-energy-consumption conveying and primary solid-liquid separation, so that subsequent treatment of solid materials is facilitated; and the solid and the liquid can be further separated through the separation mechanism, and the solid can be conveniently recycled in the later period.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-liquid separation in the mineral processing industry, and in particular to a device and process for recovering dense overflow solid materials. Background Art

[0002] Wastewater is discharged during mining operations. The wastewater contains solid materials such as fine-particle minerals and heavy metal ions, which means that the wastewater still contains a large amount of high-value products. Direct discharge will pollute the environment and waste materials. Therefore, it is necessary to collect the solid materials through sedimentation and then recycle them.

[0003] Existing mining wastewater recovery relies on gravity settling after overflow from multi-stage sedimentation tanks. Solid materials at the bottom of the sedimentation tanks are then collected and recycled manually or by pumps with removable hoses. However, the manual method is time-consuming and labor-intensive, and significantly agitates the sedimentation tanks, resulting in low solids recovery efficiency. The pump-with-hose method simultaneously absorbs liquid from the sedimentation tanks while recovering solids, resulting in excessively high moisture content in the discharged solids, adversely affecting subsequent solids processing, including thickening or dehydration. In light of this, we propose a device and process for recovering thickened overflow solids. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and process for recycling dense overflow solid materials, which solves the problems raised in the above-mentioned background technology that manual recycling is inefficient and time-consuming and labor-intensive, and the moisture content of the solid materials is too high during pump recycling.

[0005] To achieve the above object, the present invention provides the following technical solutions: A device for recovering dense overflow solid material comprises a plurality of sedimentation tanks, wherein there is a height difference between the plurality of sedimentation tanks; a sedimentation recovery mechanism is provided in the sedimentation tank for collecting and conveying the solid material after sedimentation; an extraction mechanism is also provided in the sedimentation tank for extracting the solid material; a separation mechanism is provided on the extraction mechanism, which can convey the solid material and separate the solid and liquid through vibration.

[0006] Preferably, the precipitation recovery mechanism includes a plurality of clamping seats, both sides of the clamping seats have notches, airbag splints are fixedly installed in the notches, non-woven fabrics are clamped and installed in the notches through the airbag splints, and adjacent clamping seats are fixedly connected by connecting rods.

[0007] Preferably, the sedimentation recovery mechanism also includes a drive shaft and multiple rotating rollers, and the drive shaft and multiple rotating rollers are rotatably installed near the bottom of the sedimentation tank. The multiple rotating rollers and the drive shaft are inclined relative to the bottom of the sedimentation tank, and the non-woven fabric is installed on the surface of the drive shaft and the rotating rollers.

[0008] Preferably, the non-woven fabric is composed of a three-layer structure, the top layer of the non-woven fabric is a coating fabric, the middle layer of the non-woven fabric is a steel mesh, and the bottom layer of the non-woven fabric is a base fabric.

[0009] Preferably, the extraction mechanism includes a gathering seat, which is fixedly installed at one end of the sedimentation tank close to the driving shaft. The bottom end of the gathering seat is provided with a slope one, and the inclination angle of the slope one is consistent with the inclination angle of the non-woven fabric. The bottom end of the gathering seat is also provided with a slope two, and the slope two is inclined relative to the side of the sedimentation tank. The bottom end of the gathering seat is provided with a gathering cavity at the center position near the lowest point of the non-woven fabric, and the slopes one and two are both connected to the gathering cavity.

[0010] Preferably, a withdrawal shell is fixedly installed through the upper and lower ends of the gathering seat, a spiral blade is rotatably installed in the withdrawal shell, the bottom end of the spiral blade extends out of the withdrawal shell and is located inside the gathering cavity, and a discharge pipe is opened on the surface of the withdrawal shell near the top.

[0011] Preferably, the separation mechanism includes a separation shell, the separation shell is arranged at an angle, a filter is fixedly installed in the separation shell, a separation room is arranged between the filter and the bottom end of the inner wall of the separation shell, the bottom end of the separation shell is fixedly connected to a support seat, a vibration plate is slidably installed on the support seat, the surface of the support seat is located above and below the vibration plate and springs are sleeved, the springs and the vibration plate are fixedly connected, and a vibration motor is fixedly installed on the vibration plate.

[0012] Preferably, the separation shell is fixedly connected to the discharge pipe, a water outlet pipe is fixedly installed on the surface of the separation shell near the bottom end, and a fixed outlet pipe is fixedly installed on the bottom end of the separation shell.

[0013] Preferably, a drainage box is fixedly installed on the top of the gathering seat, and a drainage board is detachably installed on the top of the pull-out shell.

[0014] The present invention also provides a process for recovering dense overflow solid material, comprising the following steps: Step 1: The multi-stage sedimentation tank automatically overflows through the height difference to precipitate the waste liquid; Step 2: Start the motor to drive the sediment recovery mechanism to work, so that the non-woven fabric slowly moves and drives the solids deposited on the non-woven fabric to move, and transport the solids into the collection chamber; Step 3: The motor drives the spiral blade to work, thereby transporting the solid material in the gathering chamber, achieving preliminary solid-liquid separation and transporting the solid to the separation shell; Step 4: The filter screen vibrates by rotating the rotating rod. The vibration can transport the solid material and perform solid-liquid separation. The separated water can be discharged through the water outlet pipe, and the dehydrated solid material can be discharged through the solid outlet pipe.

[0015] By means of the above technical solution, the present invention provides a dense overflow solid material recovery device and process having at least the following beneficial effects: 1. The present invention is provided with a sedimentation tank, a sedimentation recovery mechanism, a pumping mechanism, and a separation mechanism. The sedimentation recovery mechanism can realize continuous operation and reduce the cost of manual cleaning; the pumping mechanism can transport and perform preliminary solid-liquid separation with low energy consumption, which is convenient for subsequent processing of solid materials; the separation mechanism can further separate the solid and liquid, which is convenient for the subsequent recycling of solids.

[0016] 2. The present invention sets a precipitation recovery mechanism. The coated cloth can reduce solid adhesion, the steel mesh can enhance the tensile properties of the non-woven fabric, and the base cloth can enhance the friction between the non-woven fabric and the rotating roller, thereby enhancing the stability of the non-woven fabric during rotation, thereby effectively enhancing the working life and stability of the non-woven fabric during operation; the non-woven fabric can be detachably connected to the clamping seat, so that the non-woven fabric can be installed in a modular manner, thereby facilitating the replacement of blocked and damaged non-woven fabrics in the later stage, thereby improving the convenience of later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application: Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 It is a schematic diagram of the overall structure of the precipitation recovery mechanism of the present invention; Figure 3 It is a partial structural diagram of the precipitation recovery mechanism of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of area A; Figure 5 This is a schematic diagram of the structure of the non-woven fabric of the present invention; Figure 6 It is a schematic diagram of the overall structure of the extraction mechanism of the present invention; Figure 7 Schematic diagram of the cross-sectional structure of the extraction mechanism of the present invention; Figure 8 The structure of the present invention is schematically shown Figure 2 ; Figure 9 It is a structural schematic diagram of the separation mechanism of the present invention; Figure 10 It is a schematic diagram of the internal structure of the separation mechanism of the present invention.

[0018] In the figure: 1. Sedimentation tank; 2. Sedimentation recovery mechanism; 3. Extraction mechanism; 4. Separation mechanism; 21. Non-woven fabric; 211. Coated fabric; 212. Steel mesh; 213. Base fabric; 22. Drive shaft; 23. Rotating roller; 24. Clamping seat; 25. Notch; 26. Airbag splint; 27. Connecting rod; 31. Gathering seat; 32. Inclined surface 1; 33. Inclined surface 2; 34. Gathering chamber; 35. Extraction housing; 36. Spiral blade; 37. Discharge pipe; 38. Drainage box; 39. Drainage board; 41. Separation shell; 42. Support base; 43. Vibrating plate; 44. Filter; 45. Separation chamber; 46. Water outlet pipe; 47. Solid outlet pipe. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1-10 A dense overflow solid material recovery device includes multiple sedimentation tanks 1. There are height differences between the multiple sedimentation tanks 1, so that natural flow can be achieved between adjacent sedimentation tanks 1 by overflow. The sedimentation tanks 1 are used for natural sedimentation of solid materials under the action of gravity. The multi-stage sedimentation tanks 1 allow the sediment to be precipitated in stages.

[0021] The sedimentation tank 1 is provided with a sedimentation recovery mechanism 2, which can simultaneously realize the sedimentation, filtration and transmission functions. The solids are moved to the extraction mechanism 3 along with the non-woven fabric 21, which can realize continuous operation and reduce the cost of manual cleaning. In addition, a pumping mechanism 3 is provided in the sedimentation tank 1. The pumping mechanism 3 can realize preliminary solid-liquid separation by the difference in properties of liquid and solid, and at the same time transport the solid material to the separation mechanism 4, thereby realizing low-energy transportation and solid-liquid separation, and facilitating the subsequent treatment of the solid material. It should be noted that a separation mechanism 4 is provided on the extraction mechanism 3, and the separation mechanism 4 can further separate the solid and liquid through the vibration and gravity of the filter screen 44, and facilitate the discharge of the solid through the solid outlet pipe 47, and can transport the liquid separated in the previous stage to the next stage sedimentation tank 1, so that the solid can be further dehydrated, which is convenient for the later recycling of the solid. It should be noted that the liquid separated in the sedimentation tank 1 at the tail end can be discharged directly, or it can be circulated to other processes through a pipeline for utilization.

[0022] See also Figure 2-Figure 5 The sediment recovery mechanism 2 includes a non-woven fabric 21, which is composed of a three-layer structure. The top layer of the non-woven fabric 21 is a coated fabric 211, which is used to filter wastewater. The coating makes the surface of the coated fabric 211 smoother, reducing the adhesion of solid sediment after precipitation. The middle layer of the non-woven fabric 21 is a steel mesh 212, which enhances the strength and tensile strength of the non-woven fabric 21, making the solid sediment on the non-woven fabric 21 more stable during rotation, and effectively extending the service life of the non-woven fabric 21. The bottom layer of the non-woven fabric 21 is a base fabric 213, which is used to enhance the friction of the non-woven fabric 21, making the non-woven fabric 21 more stable during rotation.

[0023] In addition, the sedimentation recovery mechanism 2 also includes multiple clamping seats 24, and the distances between the multiple clamping seats 24 are consistent. The clamping seats 24 are used to clamp and fix the non-woven fabric 21, so that the non-woven fabric 21 has a modular design, which is convenient for later replacement of the non-woven fabric 21.

[0024] Notably, notches 25 are provided on both sides of the clamping seat 24 to provide space for the non-woven fabric 21. Airbag clamps 26 are fixedly mounted within the notches 25, and the non-woven fabric 21 is clamped and mounted within the notches 25 via the airbag clamps 26. There are two airbag clamps 26, and the contact surfaces with the non-woven fabric 21 are made of a hard structure, including but not limited to rubber or steel. The surfaces are frosted to enhance friction between the airbag clamps 26 and the non-woven fabric 21, thereby improving the stability of the non-woven fabric 21 after installation. The airbag clamps 26 can be inflated and deflated to quickly remove and install the non-woven fabric 21, making replacement of the non-woven fabric 21 convenient. Adjacent clamping seats 24 are fixedly connected by connecting rods 27, so that the clamping seats 24 form a whole, and a conveyor belt structure is formed between the clamping seats 24, the connecting rods 27 and the non-woven fabric 21, so that the non-woven fabric 21 can rotate along with the clamping seats 24 and the connecting rods 27, thereby slowly conveying the solid material.

[0025] like Figure 2 As shown, a driving shaft 22 and a plurality of rotating rollers 23 are rotatably installed near the bottom of the sedimentation tank 1. The driving shaft 22 and the plurality of rotating rollers 23 are arranged in an array. A clamping seat 24, a connecting rod 27 and a non-woven fabric 21 are installed on the surfaces of the driving shaft 22 and the rotating rollers 23. Thus, the operation of the driving shaft 22 can drive the connecting rod 27 to rotate, and the rotation of the connecting rod 27 can drive the clamping seat 24 and the non-woven fabric 21 to rotate synchronously.

[0026] A motor is fixedly installed on one side of the sedimentation tank 1 at the lower end. The output shaft of the motor and the drive shaft 22 are fixedly connected. The drive shafts 22 of adjacent sedimentation tanks 1 are connected by a synchronous belt. The synchronous belt is set in the sedimentation tank 1. The rotation of the motor can drive the drive shaft 22 fixedly connected to the output shaft to rotate synchronously, and the drive shafts 22 are driven to rotate synchronously through the synchronous belt.

[0027] Multiple rotating rollers 23 and the drive shaft 22 are tilted relative to the bottom of the sedimentation tank 1, so that the non-woven fabric 21 is tilted. When the non-woven fabric 21 rotates, the non-woven fabric 21 drives the displacement of solid materials more stably, and can increase the area of ​​the non-woven fabric 21, enhance the sedimentation accumulation surface, reduce the sedimentation thickness, and enhance the working stability of the non-woven fabric 21.

[0028] See also Figure 6-Figure 7 The extraction mechanism 3 includes a gathering seat 31, which is fixedly mounted on one end of the sedimentation tank 1 close to the drive shaft 22. The top of the gathering seat 31 is aligned with the top of the sedimentation tank 1, so that there is no dead angle when collecting solids.

[0029] It should be noted that the bottom end of the gathering seat 31 is provided with a slope 1 32, and the inclination angle of the slope 1 32 is consistent with the inclination angle of the non-woven fabric 21, so that when the non-woven fabric 21 is displaced, the solids can pass through the slope 1 32, and the slope 1 32 will not have a blocking effect on the solids, and the gathering seat 31 will not affect the operation of the non-woven fabric 21. The bottom end of the gathering seat 31 is also provided with a slope 2 33, and the slope 2 33 is inclined relative to the side of the sedimentation tank 1, so that when the non-woven fabric 21 is displaced, it drives the solids to gather toward the center along the slope 2 33. A gathering cavity 34 is provided at the center of the bottom end of the gathering seat 31 near the lowest point of the non-woven fabric 21. The slopes 1 32 and 33 are both connected to the gathering cavity 34, so that the solid materials are finally accumulated in the gathering cavity 34.

[0030] Furthermore, a pumping housing 35 is fixedly mounted through the upper and lower ends of the collecting seat 31. A spiral blade 36 is rotatably mounted within the pumping housing 35. Contact between the spiral blade 36 and the inner wall of the pumping housing 35 allows the spiral blade 36 to convey material. A motor is connected to the top of the spiral blade 36 to drive the spiral blade 36. The bottom of the spiral blade 36 extends beyond the pumping housing 35 and is located within the collecting chamber 34, allowing the spiral blade 36 to transport solid material from the collecting chamber 34, along with some liquid, into the pumping housing 35. The material ultimately moves upward along the interior of the pumping housing 35. Due to the differences in fluidity, viscosity, and other properties between liquids and solids, the spiral blade 36 can transport solid material to the top, making it difficult to transport liquid, thus achieving a preliminary solid-liquid separation. Furthermore, the top of the pumping housing 35 is positioned some distance above the top of the sedimentation tank 1, making it difficult for liquid to enter the top of the pumping housing 35 under pressure along the spiral blade 36. A discharge pipe 37 is provided on the surface of the pumping housing 35, near the top, for discharging the solid material after the initial solid-liquid separation.

[0031] At the same time, it should be noted that a drainage box 38 is fixedly installed on the top of the gathering seat 31. The bottom end of the drainage box 38 is an inclined structure, so that the liquid can move toward the sedimentation tank 1 under the action of gravity. A through hole is opened at the bottom end of the drainage box 38 on the side close to the sedimentation tank 1, so that the liquid can flow back to the inside of the sedimentation tank 1 along the through hole. In addition, a plurality of drainage plates 39 are plugged into the top of the extraction shell 35. The top of the drainage plate 39 is connected to the extraction shell 35 by bolts, so that the drainage plate 39 works stably when the spiral blade 36 is working, and the drainage plate 39 can be quickly replaced. The part of the drainage plate 39 located inside the drainage box 38 is a filtering structure for further removing liquid. The drainage plate 39 located outside the drainage box 38 is a plate-like structure to avoid contamination caused by splashing of liquid droplets.

[0032] See also Figure 7-10 The separation mechanism 4 includes a separation shell 41, which is fixedly connected to the discharge pipe 37 so that the solids discharged from the discharge pipe 37 can enter the separation shell 41 for secondary screening. The separation shell 41 is tilted to transport the solids by gravity. A filter 44 is fixedly installed in the separation shell 41. A certain gap exists between the filter 44 and the inner wall of the separation shell 41, which forms a separation chamber 45. The filter 44 can separate the solid material into solid and liquid, and the liquid can move downward along the separation chamber 45 under the action of gravity.

[0033] The bottom end of the separation housing 41 is fixedly connected to a support base 42, on which a vibration plate 43 is slidably mounted. Springs are sleeved on the surface of the support base 42, located above and below the vibration plate 43. The springs are fixedly connected to the vibration plate 43, and a vibration motor is fixedly mounted on the vibration plate 43. The vibration of the vibration motor drives the vibration plate 43 to vibrate. The vibration of the vibration plate 43 is transmitted to the separation housing 41 through the spring, driving the separation housing 41 to vibrate, thereby causing the filter screen 44 to vibrate, enhancing the efficiency of solid-liquid separation and conveying solids.

[0034] It should be noted that a water outlet pipe 46 is fixedly mounted on the surface of the separation shell 41 near the bottom end. The outlet of the water outlet pipe 46 is located at the top of the next-stage sedimentation tank 1, allowing the separated liquid to enter the next-stage sedimentation tank 1 for sedimentation. The outlet of the water outlet pipe 46 corresponding to the sedimentation tank 1 at the tail end is connected to the circulation pipeline or directly discharged. A solid discharge pipe 47 is fixedly mounted on the bottom end of the separation shell 41. The solid discharge pipe 47 is provided with a valve so that the degree of solid-liquid separation can be controlled by the valve. The solid discharge pipe 47 can quickly discharge solid materials.

[0035] The present invention provides a dense overflow solid material recovery process, using the above-mentioned dense overflow solid material recovery device, and its working steps are as follows: Step 1: The multi-stage sedimentation tank 1 automatically overflows due to the height difference, and the waste liquid is precipitated by gravity, and the precipitated solid material is deposited on the surface of the non-woven fabric 21; Step 2: Start the motor. When the motor is running, it rotates the drive shaft 22. This rotation causes the clamping seat 24, connecting rod 27, and non-woven fabric 21 to move slowly and synchronously. This slow movement of the non-woven fabric 21 causes the solids deposited on the non-woven fabric 21 to move synchronously. The solids are then transported into the collection chamber 34 through the gathering action of the second inclined surface 33 and the collection chamber 34.

[0036] Step three: The motor drives the spiral blades 36 to rotate synchronously. When the spiral blades 36 rotate, they can transport the solid material in the gathering chamber 34. During transportation, the water pressure and spiral force will drive part of the liquid to move upward synchronously, and the material moves upward along the inside of the extraction shell 35. Due to the difference in properties such as fluidity and viscosity between liquids and solids, the spiral blades 36 can transport the solid material to the top, and the liquid cannot follow the spiral blades 36 into the top, thereby achieving a preliminary solid-liquid separation effect. At the same time, when the material is transported to the drainage box 38, the material contacts the surface of the drainage plate 39 under the action of centrifugal force, which plays a filtering role. After the liquid is separated, it flows back to the sedimentation tank 1 through the gap 25 of the drainage box 38. The solid material is finally transported to the filter screen 44 inside the separation shell 41 through the discharge pipe 37.

[0037] Step 4: The vibration motor drives the vibration plate 43 to vibrate, and the vibration is transmitted to the separation shell 41 through the spring, thereby driving the filter screen 44 to vibrate. The vibration of the filter screen 44 has the effect of conveying solid materials and accelerating solid-liquid separation. The liquid moves freely downward through the inner wall of the separation shell 41 under gravity, and is finally discharged through the outlet pipe 46. The separated liquid can enter the next-level sedimentation tank 1 for sedimentation. The outlet pipe 46 corresponding to the sedimentation tank 1 at the tail end is connected to the circulation pipeline or directly discharged. The dehydrated solids are stably discharged through the solid outlet pipe 47.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dense overflow solid material recovery device, characterized in that: The invention comprises a plurality of sedimentation tanks (1), wherein there is a height difference between the plurality of sedimentation tanks (1); a sedimentation recovery mechanism (2) is provided in the sedimentation tank (1) for collecting and conveying solid materials after sedimentation; an extraction mechanism (3) is also provided in the sedimentation tank (1) for extracting the solid materials; a separation mechanism (4) is provided on the extraction mechanism (3) for conveying the solid materials and performing solid-liquid separation by vibration.

2. A dense overflow solid material recovery device according to claim 1, characterized in that: The precipitation recovery mechanism (2) includes a plurality of clamping seats (24), each of which has a notch (25) at both sides, an airbag splint (26) fixedly installed in the notch (25), a non-woven fabric (21) clamped and installed in the notch (25) by the airbag splint (26), and adjacent clamping seats (24) are fixedly connected by a connecting rod (27).

3. The dense overflow solid material recovery device according to claim 2, characterized in that: The sedimentation recovery mechanism (2) further comprises a drive shaft (22) and a plurality of rotating rollers (23), wherein the drive shaft (22) and the plurality of rotating rollers (23) are rotatably mounted near the bottom of the sedimentation tank (1), the plurality of rotating rollers (23) and the drive shaft (22) are tilted relative to the bottom of the sedimentation tank (1), and the non-woven fabric (21) is mounted on the surfaces of the drive shaft (22) and the rotating rollers (23).

4. A dense overflow solid material recovery device according to claim 3, characterized in that: The non-woven fabric (21) is composed of a three-layer structure, wherein the top layer of the non-woven fabric (21) is a coating fabric (211), the middle layer of the non-woven fabric (21) is a steel mesh (212), and the bottom layer of the non-woven fabric (21) is a base fabric (213).

5. The dense overflow solid material recovery device according to claim 2, characterized in that: The extraction mechanism (3) includes a gathering seat (31), which is fixedly mounted on one end of the sedimentation tank (1) near the driving shaft (22). The bottom end of the gathering seat (31) is provided with a first inclined surface (32), and the inclination angle of the first inclined surface (32) is consistent with the inclination angle of the non-woven fabric (21). The bottom end of the gathering seat (31) is also provided with a second inclined surface (33), and the second inclined surface (33) is inclined relative to the side of the sedimentation tank (1). The bottom end of the gathering seat (31) is provided with a gathering cavity (34) near the center of the lowest point of the non-woven fabric (21), and the first inclined surface (32) and the second inclined surface (33) are both connected to the gathering cavity (34).

6. The dense overflow solid material recovery device according to claim 5, characterized in that: A withdrawal shell (35) is fixedly installed at the upper and lower ends of the gathering seat (31), and a spiral blade (36) is rotatably installed in the withdrawal shell (35). The bottom end of the spiral blade (36) extends out of the withdrawal shell (35) and is located inside the gathering chamber (34). A discharge pipe (37) is opened on the surface of the withdrawal shell (35) near the top.

7. The dense overflow solid material recovery device according to claim 1, characterized in that: The separation mechanism (4) comprises a separation shell (41), the separation shell (41) is tilted, a filter screen (44) is fixedly installed in the separation shell (41), a separation space (45) is provided between the filter screen (44) and the bottom end of the inner wall of the separation shell (41), a support base (42) is fixedly connected to the bottom end of the separation shell (41), a vibration plate (43) is slidably mounted on the support base (42), a spring is sleeved on the upper and lower sides of the vibration plate (43) on the surface of the support base (42), the spring and the vibration plate (43) are fixedly connected, and a vibration motor is fixedly mounted on the vibration plate (43).

8. The dense overflow solid material recovery device according to claim 7, characterized in that: The separation shell (41) is fixedly connected to the discharge pipe (37), a water outlet pipe (46) is fixedly installed on the surface of the separation shell (41) near the bottom end, and a fixed outlet pipe (47) is fixedly installed at the bottom end of the separation shell (41).

9. The dense overflow solid material recovery device according to claim 5, characterized in that: A drainage box (38) is fixedly mounted on the top of the gathering seat (31), and a drainage plate (39) is detachably mounted on the top of the extraction housing 35.

10. A dense overflow solid material recovery process, used in the dense overflow solid material recovery device according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: Multi-stage sedimentation tank (1) automatically overflows through height difference to precipitate the waste liquid; Step 2: Starting the motor to drive the sediment recovery mechanism (2) to work, causing the non-woven fabric (21) to slowly move and drive the solids deposited on the non-woven fabric (21) to move, and transporting the solids into the collection chamber (34); Step 3: The motor drives the spiral blade (36) to work, thereby transporting the solid material in the gathering chamber (34), achieving preliminary solid-liquid separation and transporting the solid to the separation shell (41); Step 4: The filter screen (43) is vibrated by rotating the rotating rod (45). The vibration can transport the solid material and perform solid-liquid separation. The separated water can be discharged through the water outlet pipe (47), and the dehydrated solid material can be discharged through the solid outlet pipe (48).

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