CN109591223B

CN109591223B - A separator that is arranged in soil to separate earth and little plastics

Info

Publication number: CN109591223B
Application number: CN201811496051.2A
Authority: CN
Inventors: 吴小莲; 莫测辉; 方铮; 徐小亚; 王海龙
Original assignee: Foshan University
Current assignee: Foshan University
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2021-02-19
Anticipated expiration: 2038-12-07
Also published as: CN109591223A

Abstract

The invention discloses a separating device for separating soil and micro-plastics from soil, and relates to the field of micro-plastic separation, in particular to a closed shell and a central conveying cylinder, wherein the rear side of the closed shell is connected with a connecting pipe, a water pump is connected above the connecting pipe, a circulating water pipe is arranged above the water pump, a motor is arranged on the left side of the closed shell, a gear is connected above the motor, a gear ring is arranged on the right side of the gear, the gear and the gear ring are mutually meshed, a connecting ring is fixed on the inner side of the gear ring, a rotary cylinder is arranged in the middle of the connecting ring, the rotary cylinder and the connecting ring are fixedly connected, and a clamping ring is arranged below the rotary cylinder. This a separator for separating earth and little plastics in soil mutually supports through ring gear and gear, can drive arrangement's rotary drum rotate, and the rotation on the rotary drum nestification separation sedimentation tank of being convenient for to drive the annular filter outside the rotary drum and rotate, make annular filter carry out filtering separation work.

Description

A separator that is arranged in soil to separate earth and little plastics

Technical Field

The invention relates to the technical field of micro-plastic separation, in particular to a separation device for separating soil and micro-plastic from soil.

Background

Micro-plastics refer to plastic particles and textile fibers with small particle size, and are widely concerned by various circles due to the wide existence of the micro-plastics in marine environment and various determined and uncertain hazards to organisms, the micro-plastics are divided into two major categories, namely primary micro-plastics and secondary micro-plastics, the primary micro-plastics refer to plastic particle industrial products discharged into water environment through rivers, sewage treatment plants and the like, such as micro-plastic particles contained in cosmetics and the like or plastic particles and resin particles used as industrial raw materials, and the secondary micro-plastics are plastic particles formed by large plastic wastes which are split and reduced in volume through physical, chemical and biological processes.

Because the micro-plastics are difficult to degrade and are used as the top end of a food chain, a large amount of micro-plastics can be accumulated in human bodies under the action of enrichment, small particles which are difficult to digest cause unexpected damage to people, the micro-plastics in soil need to be separated out to prevent the micro-plastics from polluting the environment, the main separation method at present is a flotation method, but the general device for separating the micro-plastics by using the flotation method has low efficiency, can not separate the micro-plastics according to size, is inconvenient for subsequent work, and simultaneously needs corresponding saturated solution for the flotation method, so the cost is high.

Although the separation device is provided with the filter membrane, a non-precipitation layer in the water body to be separated can pass through the filter membrane, and micro plastic particles in sediments in water bodies such as rivers and lakes can be quickly and effectively separated and extracted, the separation mode of the separation device only can separate the micro plastic in the water body, and the separation device has the defects of low applicability and insufficient separation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a separating device for separating soil and micro-plastics from soil, which solves the problems in the background art.

In order to achieve the purpose, the invention is realized by the following technical scheme: a separation device for separating soil and micro-plastic in soil comprises an airtight shell and a central conveying cylinder, wherein the rear side of the airtight shell is connected with a connecting pipe, a water pump is connected above the connecting pipe, a circulating water pipe is installed above the water pump, a motor is installed on the left side of the airtight shell, a gear is connected above the motor, a gear ring is arranged on the right side of the gear, the gear and the gear ring are meshed with each other, a connecting ring is fixed on the inner side of the gear ring, a rotary cylinder is installed in the middle of the connecting ring, the rotary cylinder is fixedly connected with the connecting ring, a clamping ring is arranged below the rotary cylinder, an annular filter plate is installed on the outer side of the rotary cylinder, a scraper plate is arranged on the right side of the annular filter plate, a collecting box is connected on the right side of the scraper plate, a separation sedimentation tank is installed on the inner side of, the below of separation sedimentation tank is provided with toper mud collecting plate, the mount is installed to the inboard of separation sedimentation tank, the transmission shaft is installed to the inboard of mount, and the top of transmission shaft is connected with agitator motor, the stirring board is installed to the lower extreme of transmission shaft, the vertical central line of rotary drum and the vertical central line of separation sedimentation tank are located same straight line, and cooperate with each other between rotary drum and the separation sedimentation tank size, the bottom of center feed cylinder is provided with mud collecting tank, and center feed cylinder is located the centre of toper mud collecting plate, the outside of center feed cylinder is provided with the spliced pole, and the centre of spliced pole is provided with the collection mouth, the vertical direction evenly distributed of transmission shaft is followed to the stirring board, and the vertical central line of stirring board and transmission shaft is located same straight line.

Optionally, the vertical central line of the gear ring and the vertical central line of the drum are located on the same straight line, and the gear ring and the gear are matched in size.

Optionally, the annular filter plates are uniformly distributed along the vertical direction of the drum, and the upper surfaces of the annular filter plates are parallel to each other.

Optionally, the outside in wind gap is provided with the sprinkler bead, be parallel to each other between the vertical central line of scraper blade and the vertical central line of annular filter, and laminate each other between the lower surface of scraper blade and the upper surface of annular filter.

Optionally, a central rotating shaft is installed in the middle of the central conveying cylinder, a central spiral conveying plate is installed on the outer side of the central rotating shaft, a water leakage hole is formed in the middle of the central spiral conveying plate, the vertical central line of the conical sludge collecting plate and the vertical central line of the separation settling pond are located on the same straight line, and the vertical central line of the central conveying cylinder and the vertical central line of the conical sludge collecting plate are located on the same straight line.

Optionally, a transverse conveying cylinder is connected above the central conveying cylinder, a transverse rotating shaft is installed in the middle of the transverse conveying cylinder, a transverse spiral conveying plate is installed outside the transverse rotating shaft, a conveying plate motor is connected to the left end of the transverse rotating shaft, a sludge outlet is formed in the right end of the transverse conveying cylinder, the vertical central line of the central spiral conveying plate and the vertical central line of the central conveying cylinder are located on the same straight line, and the central spiral conveying plate and the central conveying cylinder are identical in size.

Optionally, the horizontal center line of the horizontal spiral conveying plate and the horizontal center line of the horizontal conveying cylinder are located on the same straight line, and the horizontal spiral conveying plate and the horizontal conveying cylinder are identical in size.

The invention provides a separation device for separating soil and micro-plastic from soil, which has the following beneficial effects:

1. this a separator for separating earth and little plastics in soil, mutually support through ring gear and gear, can drive arrangement's rotary drum rotate, the rotation on the rotary drum nestification separation sedimentation tank of being convenient for to the annular filter that drives the rotary drum outside rotates, makes the annular filter carry out filtering separation work, is convenient for simultaneously collect the little plastics of deposit separation on the annular filter, and the device of being convenient for carries out continuous separation work, is favorable to improving the separation efficiency of device.

2. This a separator for separating earth and little plastics in soil, the annular filter through parallel arrangement carries out the separation and the screening work of little plastics, the vertical direction of rotary drum is provided with four layers of annular filter, be parallel to each other between four layers of annular filter, and filtering gap diminishes from top to bottom gradually, be convenient for separate screening work to the little plastics of separation, divide into different size with little plastics, the going on of the subsequent processing work of being convenient for, be favorable to improving device's functionality, annular filter's right side is provided with the scraper blade simultaneously, annular filter can collect the collection box through the little plastics that the scraper blade separates the surface deposition, laminate each other between the lower surface of scraper blade and annular filter's the upper surface, the scraper blade of being convenient for is abundant collects little plastics, prevent to omit.

3. This a separator for separating earth and little plastics in soil, earth through separating the sedimentation tank to needs the separation mixes the work of deposiing, the nested rotary drum of installing in the separation sedimentation tank outside, the rotary drum can rotate in the separation sedimentation tank outside, the rotary drum of being convenient for drives the annular filter and rotates and carry out the filtration separation work, the little plastics of the deposit separation on the annular filter of being convenient for simultaneously are collected, make the device can carry out the continuous separation work, be favorable to improving the separation efficiency of device.

4. This a separator for separating earth and little plastics in soil, carry out stirring work through the mixture of stirring board in to the separation sedimentation tank, the device mixes the sedimentation work through the earth that the separation sedimentation tank needs to separate, the stirring board passes through the transmission shaft and rotates, carry out intensive mixing to the mixture in the separation sedimentation tank, be convenient for improve the mixing efficiency of earth and solution, install a plurality of stirring boards on the transmission shaft, the device is provided with four transmission shafts simultaneously, can further improve the mixing efficiency of earth and solution, accelerate separation sedimentation speed, be favorable to improving the separation efficiency of device, can improve the separation rate of device simultaneously.

5. The device for separating soil and micro-plastic in soil is characterized in that the separated soil is conveyed through the central conveying cylinder, the device is provided with a soil separating and conveying system which can continuously convey the soil for completing the micro-plastic separating work to the outside of the device to prevent the soil from being accumulated in the device and influence the working efficiency of the device, and meanwhile, the device is convenient to continuously separate, the conical sludge collecting plate can collect the soil deposited in a separating and settling pond to the central conveying cylinder to facilitate the conveying work of the central conveying cylinder, thereby being beneficial to improving the conveying efficiency of the device, the central conveying cylinder conveys the soil at the bottom upwards through the central spiral conveying plate, the central spiral conveying plate is matched with the central conveying cylinder in size, being convenient to improve the conveying efficiency of the central conveying cylinder and preventing omission, and meanwhile, the central spiral conveying plate is provided with a plurality of water leakage holes, be convenient for separate the solution in the earth mixes, can make central auger delivery board only carry out earth, reduce the waste of solution, central auger delivery board top is connected with a horizontal transport section of thick bamboo, can be through a horizontal transport section of thick bamboo with earth lateral transportation, and carry out the device through a mud outlet, a horizontal transport section of thick bamboo carries earth to the side through a horizontal auger delivery board, the size is identical between a horizontal auger delivery board and the horizontal transport section of thick bamboo, be favorable to improving the transport efficiency of a horizontal transport section of thick bamboo, the separation efficiency of improvement device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the backside structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a schematic view of a ring gear configuration of the present invention;

FIG. 5 is a schematic view of the structure of the drum of the present invention;

FIG. 6 is a schematic view of the structure of the separation and sedimentation tank of the present invention;

FIG. 7 is a schematic view of the structure of the central delivery barrel of the present invention;

FIG. 8 is a schematic view of the structure of the lateral transfer cylinder of the present invention.

In the figure: 1. sealing the housing; 2. a connecting pipe; 3. a water pump; 4. a circulating water pipe; 5. a motor; 6. a gear; 7. a ring gear; 8. a connecting ring; 9. a rotating drum; 10. a collar; 11. an annular filter plate; 12. a squeegee; 13. a collection box; 14. separating and settling a pond; 15. a conical mud collection plate; 16. a fixed mount; 17. a drive shaft; 18. a stirring motor; 19. a stirring plate; 20. a central delivery cylinder; 21. a mud collecting pool; 22. connecting columns; 23. a collection port; 24. a central rotating shaft; 25. a central spiral conveying plate; 26. a water leakage hole; 27. a transverse transport cylinder; 28. a transverse rotating shaft; 29. a transverse spiral conveying plate; 30. a conveyor plate motor; 31. a sludge outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the present invention provides a technical solution: a separation device for separating soil and micro-plastic in soil comprises a closed shell 1 and a central conveying cylinder 20, wherein the rear side of the closed shell 1 is connected with a connecting pipe 2, a water pump 3 is connected above the connecting pipe 2, a circulating water pipe 4 is installed above the water pump 3, a motor 5 is installed on the left side of the closed shell 1, a gear 6 is connected above the motor 5, a gear ring 7 is arranged on the right side of the gear 6, the gear 6 is meshed with the gear ring 7, a connecting ring 8 is fixed on the inner side of the gear ring 7, a rotary cylinder 9 is installed in the middle of the connecting ring 8, the rotary cylinder 9 is fixedly connected with the connecting ring 8, a clamping ring 10 is arranged below the rotary cylinder 9, an annular filter plate 11 is installed on the outer side of the rotary cylinder 9, a scraper 12 is arranged on the right side of the annular filter plate 11, a collecting box 13 is connected on the right side of, the separation sedimentation tank 14 is connected with the rotary drum 9 in a nested and rotating manner, the vertical central line of the gear ring 7 and the vertical central line of the rotary drum 9 are positioned on the same straight line, the gear ring 7 and the gear 6 are matched in size, the rotary drum 9 of the device can be driven to rotate through the mutual matching of the gear ring 7 and the gear 6, the rotary drum 9 is conveniently nested on the separation sedimentation tank 14 to rotate, so that an annular filter plate 11 on the outer side of the rotary drum 9 is driven to rotate, the annular filter plate 11 is enabled to carry out filtering and separation work, and meanwhile, the micro plastic deposited and separated on the annular filter plate 11 is conveniently collected, the device is convenient to carry out continuous separation work, and the;

the annular filter plates 11 are uniformly distributed along the vertical direction of the rotary drum 9, the upper surfaces of the annular filter plates 11 are parallel to each other, the annular filter plates 11 arranged in parallel are used for separating and screening micro-plastics, four layers of annular filter plates 11 are arranged in the vertical direction of the rotary drum 9, the four layers of annular filter plates 11 are parallel to each other, the filtering clearance is gradually reduced from top to bottom, the separated micro-plastics are convenient to separate and screen, the micro-plastics are divided into different sizes, the subsequent processing work is convenient to be carried out, the functionality of the device is improved, the vertical central line of the scraper 12 is parallel to the vertical central line of the annular filter plates 11, the lower surfaces of the scraper 12 and the upper surfaces of the annular filter plates 11 are mutually attached, the scraper 12 is arranged on the right side of the annular filter plates 11, the annular filter plates 11 can collect the micro-plastics separated by surface deposition into the collecting, the lower surface of the scraper 12 is mutually attached to the upper surface of the annular filter plate 11, so that the scraper 12 can fully collect the micro-plastic, and omission is prevented;

a conical sludge collecting plate 15 is arranged below the separation and sedimentation tank 14, a fixing frame 16 is arranged on the inner side of the separation and sedimentation tank 14, a transmission shaft 17 is arranged on the inner side of the fixing frame 16, a stirring motor 18 is connected above the transmission shaft 17, a stirring plate 19 is arranged at the lower end of the transmission shaft 17, the vertical central line of the rotary drum 9 and the vertical central line of the separation and sedimentation tank 14 are positioned on the same straight line, the rotary drum 9 and the separation and sedimentation tank 14 are matched in size, soil to be separated is mixed and sedimentated through the separation and sedimentation tank 14, the rotary drum 9 is nested outside the separation and sedimentation tank 14 and can rotate outside the separation and sedimentation tank 14, the rotary drum 9 can drive the annular filter plate 11 to rotate for filtering and separating, and simultaneously, the micro plastic deposited and separated on the annular filter plate 11 can be collected, the device can perform continuous separation work, and the separation efficiency, the bottom of the central conveying cylinder 20 is provided with a mud collecting pool 21, the central conveying cylinder 20 is positioned in the middle of the conical mud collecting plate 15, the outer side of the central conveying cylinder 20 is provided with a connecting column 22, the middle of the connecting column 22 is provided with a collecting port 23, the stirring plates 19 are uniformly distributed along the vertical direction of the transmission shaft 17, the vertical central line of the stirring plates 19 and the vertical central line of the transmission shaft 17 are positioned on the same straight line, the mixture in the separation sedimentation tank 14 is stirred by the stirring plates 19, the device is used for mixing and precipitating the soil to be separated by the separation sedimentation tank 14, the stirring plates 19 rotate through the transmission shaft 17 to fully stir the mixture in the separation sedimentation tank 14, the mixing efficiency of the soil and the solution is improved, the plurality of stirring plates 19 are installed on the transmission shaft 17, and the device is provided with four transmission shafts 17, so that the mixing efficiency of the soil and the soil, the separation and precipitation speed is accelerated, the separation efficiency of the device is improved, and the separation rate of the device can be improved;

the central rotating shaft 24 is installed in the middle of the central conveying cylinder 20, the central spiral conveying plate 25 is installed outside the central rotating shaft 24, the water leakage hole 26 is arranged in the middle of the central spiral conveying plate 25, the vertical central line of the conical mud collecting plate 15 and the vertical central line of the separation sedimentation tank 14 are positioned on the same straight line, the vertical central line of the central conveying cylinder 20 and the vertical central line of the conical mud collecting plate 15 are positioned on the same straight line, separated soil is conveyed through the central conveying cylinder 20, the device is provided with a soil separation and conveying system, soil which finishes micro-plastic separation work can be continuously conveyed out of the device, the soil is prevented from being accumulated in the device, the working efficiency of the device is influenced, meanwhile, the device can be conveniently and continuously separated, the conical mud collecting plate 15 can collect the soil deposited in the separation sedimentation tank 14 to the central conveying cylinder 20, and the conveying work of the central conveying cylinder 20 is facilitated, the conveying efficiency of the device is improved, the upper part of the central conveying cylinder 20 is connected with the transverse conveying cylinder 27, the middle of the transverse conveying cylinder 27 is provided with the transverse rotating shaft 28, the outer side of the transverse rotating shaft 28 is provided with the transverse spiral conveying plate 29, the left end of the transverse rotating shaft 28 is connected with the conveying plate motor 30, the right end of the transverse conveying cylinder 27 is provided with the mud outlet 31, the vertical central line of the central spiral conveying plate 25 and the vertical central line of the central conveying cylinder 20 are positioned on the same straight line, the size of the central spiral conveying plate 25 is matched with that of the central conveying cylinder 20, the central conveying cylinder 20 conveys the mud at the bottom upwards through the central spiral conveying plate 25, the size of the central spiral conveying plate 25 is matched with that of the central conveying cylinder 20, the conveying efficiency of the central conveying cylinder 20 is improved conveniently, omission is prevented, and meanwhile the central spiral conveying plate 25 is, be convenient for separate the solution in the earth mixes, can make central screw conveyor plate 25 only carry out earth, reduce the waste of solution, horizontal screw conveyor plate 29's horizontal central line and horizontal conveyor 27's horizontal central line are located same straight line, and the size is identical between horizontal screw conveyor plate 29 and the horizontal conveyor 27, central screw conveyor plate 25 top is connected with horizontal conveyor 27, can be through horizontal conveyor 27 with earth lateral transfer, and carry out the device through mud outlet 31, horizontal conveyor 27 carries earth to the side through horizontal screw conveyor plate 29, the size is identical between horizontal screw conveyor plate 29 and the horizontal conveyor 27, be favorable to improving the transport efficiency of horizontal conveyor 27, the separation efficiency of improvement device.

In conclusion, the separation device for separating soil and micro-plastic in soil is used, soil to be separated is put into the separation sedimentation tank 14, then corresponding solution is added, the mixture in the separation sedimentation tank 14 is stirred through the stirring plate 19, the stirring motor 18 drives the transmission shaft 17 to rotate, the stirring plate 19 rotates through the transmission shaft 17 to fully stir the mixture in the separation sedimentation tank 14, the mixing efficiency of the soil and the solution can be improved, the separation sedimentation speed is accelerated, the stirring is stopped after the mixture is mixed for a period of time, the solution is precipitated for a period of time, the soil is precipitated at the bottom of the solution due to the fact that the soil is large in mass and hydrophilic, the micro-plastic particles are small in density and non-hydrophilic, the micro-plastic particles float on the surface of the solution and are separated from the soil, the solution is added into the separation sedimentation tank 14 after the separation is completed, the liquid level in the separation and sedimentation tank 14 is raised to cause the overflow of the internal solution, the solution overflows together with the micro plastic particles on the surface of the solution and falls on the first layer annular filter plate 11, the annular filter plate 11 separates the micro plastic particles from the solution, the larger micro plastic particles are remained on the surface of the first layer annular filter plate 11, the smaller micro plastic particles and the solution fall into the next layer annular filter plate 11 through the first layer annular filter plate 11 for separation and filtration until the separation work is completed, the solution falls into the closed shell 1, the solution enters the water pump 3 through the connecting pipe 2 and is re-injected into the separation and sedimentation tank 14 through the circulating water pipe 4 to complete the circulation work, the motor 5 drives the gear 6 to rotate, the gear 6 drives the gear ring 7 to drive the rotary drum 9 to rotate on the separation and sedimentation tank 14, the rotary drum 9 drives the annular filter plate 11 outside the rotary drum 9 to rotate, so that the annular filter plate 11 can collect the surface deposition separated micro, the device is convenient for continuous separation work, the soil deposited in the separation sedimentation tank 14 is collected to the bottom of the central conveying cylinder 20 through the conical sludge collecting plate 15 and enters the central conveying cylinder 20 through the collecting port 23, the central rotating shaft 24 drives the central spiral conveying plate 25 to rotate, the soil at the bottom of the central conveying cylinder 20 is conveyed upwards, the central spiral conveying plate 25 is provided with a plurality of water leakage holes 26, the solution in the soil mixture is separated, the central spiral conveying plate 25 can convey the soil out only, the waste of the solution is reduced, the soil is conveyed into the transverse conveying cylinder 27, the conveying plate motor 30 drives the transverse rotating shaft 28 to rotate, the transverse rotating shaft 28 drives the transverse spiral conveying plate 29 to rotate, the soil in the transverse conveying cylinder 27 is conveyed to the side, the soil is conveyed out of the device through the sludge outlet 31, after the soil is conveyed, only the separation solution is reserved in the separation sedimentation tank 14, the next batch of soil which needs to be separated can be added to carry out separation work, the waste of solution can be reduced to a certain extent, and the using process of the whole separation device is completed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a separator that is arranged in soil to separate earth and little plastics, includes airtight shell (1) and central transport cylinder (20), its characterized in that: the rear side of the closed shell (1) is connected with a connecting pipe (2), a water pump (3) is connected above the connecting pipe (2), a circulating water pipe (4) is installed above the water pump (3), a motor (5) is installed on the left side of the closed shell (1), a gear (6) is connected above the motor (5), a gear ring (7) is arranged on the right side of the gear (6), the gear (6) and the gear ring (7) are meshed with each other, a connecting ring (8) is fixed on the inner side of the gear ring (7), a rotary drum (9) is installed in the middle of the connecting ring (8), the rotary drum (9) and the connecting ring (8) are fixedly connected, a clamping ring (10) is arranged below the rotary drum (9), an annular filter plate (11) is installed on the outer side of the rotary drum (9), and a scraper (12) is arranged on the right side of the annular filter plate, the right side of the scraper blade (12) is connected with a collecting box (13), a separation sedimentation tank (14) is installed on the inner side of the rotary drum (9), the separation sedimentation tank (14) is connected with the rotary drum (9) in a nested and rotating manner, a conical sludge collecting plate (15) is arranged below the separation sedimentation tank (14), a fixing frame (16) is installed on the inner side of the separation sedimentation tank (14), a transmission shaft (17) is installed on the inner side of the fixing frame (16), a stirring motor (18) is connected above the transmission shaft (17), a stirring plate (19) is installed at the lower end of the transmission shaft (17), the vertical central line of the rotary drum (9) and the vertical central line of the separation sedimentation tank (14) are located on the same straight line, the rotary drum (9) and the separation sedimentation tank (14) are matched in size, and a sludge collecting tank (21) is arranged at the bottom of the central conveying drum, and center conveying cylinder (20) is located the centre of toper mud collecting plate (15), the outside of center conveying cylinder (20) is provided with spliced pole (22), and the centre of spliced pole (22) is provided with collects mouth (23), stirring board (19) are along the vertical direction evenly distributed of transmission shaft (17), and the vertical central line of stirring board (19) and the vertical central line of transmission shaft (17) are located same straight line.

2. A device for separating soil from micro-plastics in soil according to claim 1, wherein: the vertical central line of the gear ring (7) and the vertical central line of the rotary drum (9) are positioned on the same straight line, and the gear ring (7) is matched with the gear (6) in size.

3. A device for separating soil from micro-plastics in soil according to claim 1, wherein: the annular filter plates (11) are uniformly distributed along the vertical direction of the rotary drum (9), and the upper surfaces of the annular filter plates (11) are parallel to each other.

4. A device for separating soil from micro-plastics in soil according to claim 1, wherein: the vertical central line of scraper blade (12) is parallel to the vertical central line of annular filter plate (11) each other, and laminates each other between the lower surface of scraper blade (12) and the upper surface of annular filter plate (11).

5. A device for separating soil from micro-plastics in soil according to claim 1, wherein: the top of a central transport section of thick bamboo (20) is connected with a transverse transport section of thick bamboo (27), and installs transverse rotating shaft (28) in the middle of a transverse transport section of thick bamboo (27), transverse spiral delivery board (29) are installed in the outside of transverse rotating shaft (28), the left end of transverse rotating shaft (28) is connected with conveying board motor (30), the right-hand member of a transverse transport section of thick bamboo (27) is provided with mud outlet (31).

6. A device for separating soil from micro-plastics in soil according to claim 1, wherein: the central rotating shaft (24) is installed in the middle of the central conveying cylinder (20), the central spiral conveying plate (25) is installed on the outer side of the central rotating shaft (24), a water leakage hole (26) is formed in the middle of the central spiral conveying plate (25), the vertical central line of the conical sludge collecting plate (15) and the vertical central line of the separation sedimentation tank (14) are located on the same straight line, the vertical central line of the central conveying cylinder (20) and the vertical central line of the conical sludge collecting plate (15) are located on the same straight line, the vertical central line of the central spiral conveying plate (25) and the vertical central line of the central conveying cylinder (20) are located on the same straight line, and the sizes of the central spiral conveying plate (25) and the central conveying cylinder (20) are matched.

7. A device for separating soil from micro-plastics in soil as claimed in claim 5, wherein: the horizontal center line of the transverse spiral conveying plate (29) and the horizontal center line of the transverse conveying cylinder (27) are positioned on the same straight line, and the sizes of the transverse spiral conveying plate (29) and the transverse conveying cylinder (27) are matched.