Earthworm screening device for mine soil remediation and use method of earthworm screening device

Abstract

The invention relates to an earthworm screening device for mine soil remediation. The earthworm screening device comprises a primary separation assembly, a blanking bin, a collecting bin, a vertical partition plate, a light source, a transverse partition plate, non-woven fabric, holes and air holes. Young earthworms and most of wormcast are screened out through the primary separation assembly, adult earthworms fall into the falling bin through a discharging port of the primary separation assembly, and due to the fact that the earthworms have the negative phototaxis of avoiding light rays and the touch property of the earthworms like drilling in holes, the earthworms in the falling bin try to find a dark and shelter, and the earthworms in the falling bin are prevented from being damaged. The earthworms can rapidly penetrate through the non-woven fabric and the holes through the wet non-woven fabric under the attraction of the bait, and in the penetrating process, wormcast on the bodies is scraped off by the wet non-woven fabric and finally reaches the clean collecting bin to be collected, so that the screening effect of the earthworms is improved, and the situation that the wormcast attached to the bodies of the earthworms introduces a new pollution source into a remediation site is avoided; further, the remediation effect of the earthworms on the mine soil is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine soil remediation, and particularly relates to an earthworm screening device for mine soil remediation and a use method thereof. BACKGROUND

[0002] Mineral resources are important natural resources and important material basis for the development of social production. The production and life of modern society cannot be separated from mineral resources. However, the development of mineral resources will cause environmental problems such as extremely poor soil substrate, low organic matter content, low clay content and poor texture in mine soil, which seriously affects the normal life of the people around the mine and social stability, and also makes the mine environment restoration and management work very difficult and heavy.

[0003] Earthworms are common terrestrial annelids that live in soil, feed on livestock manure and organic waste, and swallow soil and organic matter. After digestion, the granular material called "earthworm manure" is discharged. The excellent granular structure is the basis of soil fertility and can effectively retain water and fertilizer. Their activities are equivalent to continuous and gentle "deep plowing", which brings deep soil to the surface and brings surface organic matter to the deep layer, promoting the exchange of soil layers. They are called "ecosystem engineers".

[0004] Therefore, in order to better repair the mine contaminated soil, earthworms can be introduced into the mine soil to repair the soil. This repair technology is called "earthworm repair technology". Since the raw materials used for breeding earthworms (such as sludge, livestock manure, and organic waste) may contain high concentrations of heavy metals, persistent organic pollutants or salts, earthworm manure may also accumulate these pollutants. Direct application of contaminated earthworm manure to the mine is equivalent to introducing a new source of pollution to the repair site, which may cause secondary pollution, which is contrary to the original intention of ecological restoration. The earthworms must be separated and the contaminated earthworm manure must be discarded. Only "clean" earthworms can be introduced into the mine soil. This requires the earthworms to be screened from the earthworm manure. During screening, a screening machine is usually used. However, after screening, a large amount of earthworm manure with pollutants still adheres to the skin of the earthworms, which will introduce a new source of pollution to the repair site and affect the mine soil remediation effect. SUMMARY

[0005] This invention provides an earthworm screening device and its usage method for mine soil remediation, which can solve the problem in the prior art where earthworms and earthworm castings are not completely separated, and earthworm castings attached to the earthworm's body still introduce new pollution sources into the remediation site, affecting the mine soil remediation effect.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an earthworm screening device for mine soil remediation and its usage method, wherein the earthworm screening device for mine soil remediation in the present invention includes: a primary separation component and a secondary separation component, characterized in that: the primary separation component is used to screen out juvenile earthworms and most earthworm castings; The secondary separation component includes a discharge bin, a collection bin, a vertical partition, a light source, a horizontal partition, and non-woven fabric. The discharge port of the primary separation component is connected to the discharge bin. The vertical partition is vertically arranged between the discharge bin and the collection bin. The lower part of the vertical partition has multiple holes. The light source is located inside the discharge bin. The horizontal partition is horizontally arranged in the upper part of the collection bin. The horizontal partition is used to place bait to attract earthworms. The horizontal partition has multiple ventilation holes. The non-woven fabric is tightly attached to the side of the vertical partition facing the discharge bin.

[0007] Preferably, the diameter of the hole is in the range of 15mm-25mm.

[0008] Preferably, the diameter of the vent hole is less than 15 mm.

[0009] Preferably, the secondary separation component further includes a nonwoven fabric replacement mechanism, which includes a release motor, a release roller, a winding motor, and a winding roller. The output end of the release motor is fixedly connected to the release roller, the output end of the winding motor is fixedly connected to the winding roller, the nonwoven fabric is wound on the release roller, and the free end of the nonwoven fabric is fixedly connected to the winding roller.

[0010] Preferably, the secondary separation component further includes a nonwoven fabric wetting mechanism, which includes a water storage tank and an immersion wheel. The water storage tank is used to store pure water, and the immersion wheel is rotatably connected to the inside of the water storage tank. The pure water inside the water storage tank submerges the immersion wheel, and the nonwoven fabric passes around the immersion wheel.

[0011] Preferably, the secondary separation component further includes a nonwoven fabric humidity control mechanism, which includes two squeezing rollers rotatably connected inside the water storage tank. The two squeezing rollers are located above the pure water surface, and the nonwoven fabric passes between the two squeezing rollers after being immersed from the water surface in the water storage tank.

[0012] Preferably, the nonwoven fabric humidity control mechanism further includes a guide wheel, which is rotatably connected to the outer wall of the water storage tank, and the nonwoven fabric passes between the two extrusion wheels and then around the guide wheel.

[0013] A method for sieving earthworms includes the following steps: S1: Earthworms and earthworm castings are initially separated by the primary separation component, which screens out young earthworms and most of the earthworm castings, while adult earthworms fall into the feed bin. S2: Utilizing the negative phototaxis of earthworms combined with bait attraction, earthworms are driven by light and strongly attracted by the smell of food, thus actively and positively passing through the holes in the non-woven fabric and partition. During the passage, the earthworm castings on their bodies are scraped off by the moist non-woven fabric, and finally reach the clean collection chamber. S3: The release motor drives the release roller to rotate and release the non-woven fabric, and the winding motor drives the winding roller to rotate and wind the non-woven fabric, replacing the wet non-woven fabric that is tightly attached to the surface of the partition plate.

[0014] Compared to existing technologies, this invention utilizes a combination of a primary separation component, a feeding bin, a collection bin, vertical partitions, a light source, horizontal partitions, non-woven fabric, holes, and ventilation holes. The light source in the feeding bin is turned on, and bait to attract earthworms is placed on the horizontal partitions. The scent of the bait diffuses into the feeding bin through the ventilation holes and perforations. The primary separation component initially separates the earthworms and their castings, filtering out juvenile earthworms and most of the castings. Adult earthworms fall into the feeding bin through the outlet of the primary separation component. Due to their negative phototaxis (avoiding light) and tactile tropism (liking to burrow into holes), earthworms in the feeding bin will seek darkness and shelter. Lured by the bait, they quickly pass through the non-woven fabric and holes. During this process, the castings on their bodies are scraped off by the moistened non-woven fabric, ultimately reaching the clean collection bin for collection. This improves the earthworm sieving efficiency and prevents the castings attached to the earthworms from introducing new sources of pollution into the remediation site, thereby enhancing the earthworm's remediation effect on mine soil. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 3 This is a side view of the vertical partition structure of the present invention; Figure 4 This is a top view of the transverse diaphragm structure of the present invention; Figure 5 This is a top sectional view of the material discharge bin and collection bin of the present invention; Figure 6 This is a side cross-sectional view of the material hopper structure of the present invention.

[0016] In the diagram: 1. Feeding bin; 2. Collection bin; 3. Vertical partition; 4. Hole; 5. Light source; 6. Horizontal partition; 7. Non-woven fabric; 8. Release motor; 9. Release roller; 10. Winding motor; 11. Winding roller; 12. Water tank; 13. Immersion wheel; 14. Guide wheel; 15. Extrusion wheel; 16. Vent hole; 17. Annular guide groove; 18. Screen cylinder; 19. Guide ring; 20. Motor; 21. Drive gear; 22. Driven gear ring; 23. Reciprocating screw; 24. Guide rod; 25. Drive pulley; 26. Driven pulley; 27. Belt; 28. Mounting plate; 29. ​​Scraper; 30. Sealing door; 31. Bracket. Detailed Implementation

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] like Figures 1 to 5 As shown, an earthworm screening device for mine soil remediation and its usage method are disclosed. The earthworm screening device for mine soil remediation in this invention includes a primary separation component and a secondary separation component. The primary separation component is used to screen out juvenile earthworms and most of the earthworm castings. The secondary separation component includes a discharge bin 1, a collection bin 2, a vertical partition 3, a light source 5, a horizontal partition 6, and a non-woven fabric 7. The discharge port of the primary separation component is connected to the discharge bin 1. The vertical partition 3 is vertically arranged between the discharge bin 1 and the collection bin 2. The vertical partition 3 is used to isolate the light emitted by the light source 5, creating a bright environment in the discharge bin 1 and a dark environment in the collection bin 2. The lower part of the vertical partition 3 has multiple holes 4. The light source 5 is located inside the discharge bin 1. The horizontal partition 6 is horizontally arranged in the upper part of the collection bin 2. The horizontal partition 6 is used to place bait to attract earthworms. The bait is banana puree or fermented feed. The horizontal partition 6 has multiple ventilation holes 16. The non-woven fabric 7 is tightly attached to the side of the vertical partition 3 facing the discharge bin 1.

[0019] The primary separation assembly includes a support 31, an annular guide groove 17, a screen cylinder 18, a guide ring 19, a motor 20, a drive gear 21, and a driven gear ring 22. The annular guide groove 17 is inclinedly arranged on the support 31. The guide ring 19 and the driven gear ring 22 are arranged on the cylinder wall of the screen cylinder 18. The central axis of the guide ring 19 coincides with the central axis of the screen cylinder 18. The motor 20 is arranged on the support 31. The drive gear 21 is arranged at the output end of the motor 20. The drive gear 21 meshes with the driven gear ring 22. The aperture of the screen holes on the surface of the screen cylinder 18 is less than 15mm.

[0020] In practical use, turn on the light source 5 in the feeding bin 1, place bait to attract earthworms on the partition 6, and let the scent of the bait diffuse into the feeding bin 1 through the vent 16 and holes 4. Put the earthworms and earthworm castings into the sieve cylinder 18 together. The motor 20 drives the drive gear 21 to rotate, and the drive gear 21 drives the sieve cylinder 18 to rotate through the driven gear ring 22. Young earthworms and most of the earthworm castings fall from the sieve holes on the surface of the sieve cylinder 18, and adult earthworms fall into the feeding bin 1 through the discharge port of the primary separation component. Because earthworms have negative phototaxis to avoid light and tactile tropism to crawl in holes, the earthworms in the feeding bin 1 will try to find darkness and shelter. With the attraction of the bait, they will quickly pass through the non-woven fabric 7 and holes 4. During the process, the earthworm castings on their bodies are scraped off by the wet non-woven fabric 7, and finally reach the clean collection bin 2 for collection.

[0021] like Figures 2 to 3 As shown, in order to improve the separation effect of earthworm castings on earthworms, the diameter of the hole 4 is preferably in the range of 15mm-25mm.

[0022] Specifically, the diameter of hole 4 is such that an adult earthworm can pass through smoothly, but not so easily as to pass through without friction.

[0023] like Figure 2 and Figure 4 As shown, in order to improve the separation effect of earthworm castings on earthworms, preferably, the diameter of the vent hole 16 is less than 15mm.

[0024] Specifically, it prevents adult earthworms from passing through the septum 6, prevents earthworms from coming into contact with the bait, and improves the purity of earthworm separation.

[0025] like Figures 1 to 2 and Figure 5As shown, in order to improve the separation effect of earthworm castings on earthworms, the secondary separation component preferably includes a non-woven fabric replacement mechanism. The non-woven fabric replacement mechanism includes a release motor 8, a release roller 9, a winding motor 10, and a winding roller 11. The output end of the release motor 8 is fixedly connected to the release roller 9, the output end of the winding motor 10 is fixedly connected to the winding roller 11, the non-woven fabric 7 is wound on the release roller 9, and the free end of the non-woven fabric 7 is fixedly connected to the winding roller 11.

[0026] Specifically, the non-woven fabric 7 is a consumable material. After the earthworm passes through it, holes will be formed in the non-woven fabric 7, and a large amount of earthworm castings will be attached to it. This will affect the subsequent separation of earthworms and earthworm castings. By setting up the release motor 8, release roller 9, winding motor 10 and winding roller 11, the release motor 8 can drive the release roller 9 to rotate and release the non-woven fabric 7, and the winding motor 10 can drive the winding roller 11 to rotate and wind the non-woven fabric 7. The wet non-woven fabric 7 that is in close contact with the surface of the partition plate 6 is replaced, thereby improving the separation effect of earthworm castings on the earthworm.

[0027] like Figures 1 to 2 As shown, in order to improve the separation effect of earthworm castings, preferably, the secondary separation component also includes a non-woven fabric wetting mechanism. The non-woven fabric wetting mechanism includes a water storage tank 12 and an immersion wheel 13. The water storage tank 12 is used to store pure water. The immersion wheel 13 is rotatably connected to the inside of the water storage tank 12. The pure water inside the water storage tank 12 submerges the immersion wheel 13, and the non-woven fabric 7 passes around the immersion wheel 13.

[0028] Specifically, during the replacement process, under the squeezing action of the immersion wheel 13, the newly replaced non-woven fabric 7 will first be moistened by the pure water in the water storage tank 12. On the one hand, this provides a suitable microenvironment for earthworms to move around and provides moisture to the surface of the earthworm's skin, preventing the skin from drying out and being damaged. On the other hand, the moistened non-woven fabric 7 helps to moisten the earthworm castings on the earthworm's skin and makes it easier to rub off the earthworm castings attached to the earthworm's skin, thus improving the separation effect of earthworm castings on the earthworm.

[0029] like Figures 1 to 2 As shown, in order to improve the separation effect of earthworm castings, the secondary separation component preferably includes a non-woven fabric humidity control mechanism. The non-woven fabric humidity control mechanism includes two squeezing wheels 15, which are rotatably connected to the inside of the water storage tank 12. The two squeezing wheels 15 are located above the pure water surface. The non-woven fabric 7 is immersed from the water surface of the water storage tank 12 and passes between the two squeezing wheels 15.

[0030] like Figures 1 to 2As shown, in order to improve the separation effect of earthworm castings on earthworms, preferably, the non-woven fabric humidity control mechanism also includes a guide wheel 14. The guide wheel 14 is rotatably connected to the outer wall of the water storage tank 12, and the non-woven fabric 7 passes through the two extrusion wheels 15 and then goes around the guide wheel 14.

[0031] Specifically, the non-woven fabric 7, after being soaked in pure water, is squeezed by two extrusion rollers 15, reducing its moisture content. This keeps the non-woven fabric 7 in a wrung-out state, preventing the earthworms from suffocating due to excessive moisture, causing bacterial infection, or malfunctioning the device. This, in turn, improves the separation effect of earthworm castings from the earthworms.

[0032] like Figures 5 to 6 As shown, in order to improve the separation effect of earthworm castings, preferably, the inside of the feeding bin 1 is rotatably connected to a horizontally arranged reciprocating screw 23, the reciprocating screw 23 is parallel to a guide rod 24, the winding roller 11 is coaxially arranged with a driving pulley 25, the reciprocating screw 23 is coaxially arranged with a driven pulley 26, a belt 27 is connected between the driving pulley 25 and the driven pulley 26, a mounting plate 28 is threadedly connected to the reciprocating screw 23, the mounting plate 28 is slidably connected to the guide rod 24, a scraper 29 is provided at the lower end of the mounting plate 28, and sealing doors 30 are respectively hinged to the front and rear side walls of the feeding bin 1.

[0033] Specifically, during the replacement of nonwoven fabric 7, the winding motor 10 drives the drive pulley 25 to rotate. The drive pulley 25 drives the driven pulley 26 to rotate via the belt 27. The driven pulley 26 drives the reciprocating screw 23 to rotate. Under the guidance of the guide rod 24, the reciprocating screw 23 drives the scraper 29 to reciprocate once inside the material hopper 1 via the mounting plate 28, scraping the earthworm castings inside the material hopper 1 to both sides. This makes it easier for the staff to open the sealing door 30 to clean the earthworm castings accumulated inside the material hopper 1, preventing the earthworm castings from adhering to the skin of earthworms entering the material hopper 1 later, and improving the separation effect of earthworm castings on earthworms.

[0034] A method for sieving earthworms includes the following steps: S1: Earthworms and earthworm castings are initially separated by the primary separation component, screening out young earthworms and most of the earthworm castings, while adult earthworms fall into the feed bin 1. S2: By utilizing the negative phototaxis of earthworms combined with bait attraction, earthworms are driven by light and strongly attracted by the smell of food, thus actively and positively passing through the holes 4 on the non-woven fabric 7 and the partition 6. During the passage, the earthworm castings on their bodies are scraped off by the moist non-woven fabric 7, and finally reach the clean collection chamber 2. S3: The release motor 8 drives the release roller 9 to rotate and release the nonwoven fabric 7. The winding motor 10 drives the winding roller 11 to rotate and wind the nonwoven fabric 7, replacing the wet nonwoven fabric 7 that is tightly attached to the surface of the partition plate 6.

[0035] Compared to existing technologies, this invention utilizes a combination of a primary separation component, a feeding bin 1, a collection bin 2, a vertical partition 3, a light source 5, a horizontal partition 6, non-woven fabric 7, holes 4, and ventilation holes 16. When the light source 5 is turned on in the feeding bin 1, bait to attract earthworms is placed on the horizontal partition 6. The aroma of the bait diffuses into the feeding bin 1 through the ventilation holes 16 and holes 4. The primary separation component performs initial separation of earthworms and earthworm castings, filtering out juvenile earthworms and most of the castings. Adult earthworms fall into the feeding bin 1 through the outlet of the primary separation component. In silo 1, earthworms exhibit negative phototaxis (avoiding light) and tectonicity (liking to burrow into holes). They attempt to find darkness and shelter, and, lured by bait, quickly pass through the non-woven fabric 7 and holes 4. During this process, their worm castings are scraped off by the moistened fabric 7, eventually reaching the clean collection silo 2 for collection. This improves the sieving effect of earthworms and prevents their castings from introducing new sources of pollution into the remediation site, thereby enhancing the earthworm's remediation effect on mine soil.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An earthworm screening device for mine soil remediation comprising a primary separation assembly and a secondary separation assembly characterised in that: The primary separation assembly is used to screen out young earthworms and most of the earthworm manure; The secondary separation assembly comprises a material falling bin, a collection bin, a vertical partition, a light source, a horizontal partition and a non-woven fabric, the material outlet of the primary separation assembly is connected with the material falling bin, the vertical partition is vertically arranged between the material falling bin and the collection bin, a plurality of holes are formed in the lower part of the vertical partition, the light source is arranged in the interior of the material falling bin, the horizontal partition is horizontally arranged at the upper part of the interior of the collection bin, the horizontal partition is used to place bait for attracting earthworms, a plurality of air holes are formed in the horizontal partition, and the non-woven fabric is tightly attached to the side of the vertical partition facing the material falling bin.

2. The mine soil remediation earthworm screening device according to claim 1, characterized in that: The diameter of the holes ranges from 15 mm to 25 mm.

3. The mine soil remediation earthworm screening device of claim 1, wherein: The diameter of the air holes is less than 15 mm.

4. The mine soil remediation earthworm screening device of claim 1, wherein: The secondary separation assembly further comprises a non-woven fabric replacement mechanism, the non-woven fabric replacement mechanism comprises a release motor, a release roller, a winding motor and a winding roller, the output end of the release motor is fixedly connected with the release roller, the output end of the winding motor is fixedly connected with the winding roller, the non-woven fabric is wound on the release roller, and the free end of the non-woven fabric is fixedly connected to the winding roller.

5. The mine soil remediation earthworm sifter of claim 1, wherein: The secondary separation assembly further comprises a non-woven fabric wetting mechanism, the non-woven fabric wetting mechanism comprises a water storage tank and a liquid immersion wheel, the water storage tank is used to store pure water, the liquid immersion wheel is rotationally connected in the interior of the water storage tank, the pure water in the interior of the water storage tank is higher than the liquid immersion wheel, and the non-woven fabric passes by the liquid immersion wheel.

6. The mine soil remediation earthworm sifter device of claim 5, wherein: The secondary separation assembly further comprises a non-woven fabric humidity control mechanism, the non-woven fabric humidity control mechanism comprises two squeezing wheels, the two squeezing wheels are rotationally connected in the interior of the water storage tank, the two squeezing wheels are located above the liquid level of the pure water, and the non-woven fabric passes between the two squeezing wheels after being immersed from the liquid level of the water storage tank.

7. The mine soil remediation earthworm sifter device of claim 6, wherein: The non-woven fabric humidity control mechanism further comprises a guide wheel, the guide wheel is rotationally connected to the outer wall of the water storage tank, and the non-woven fabric passes around the guide wheel after passing between the two squeezing wheels.

8. A method for screening earthworms, which is performed using the earthworm screening device for mine soil remediation according to claim 7, characterized by, The method comprises the following steps: S1: the earthworms and earthworm manure are preliminarily separated through the primary separation assembly, young earthworms and most of the earthworm manure are screened out, and adult earthworms fall in the material falling bin; S2: the negative phototaxis of earthworms is combined with bait attraction, the earthworms are driven by light and strongly attracted by food smell, so that the earthworms actively and positively pass through the holes in the non-woven fabric and the horizontal partition, the earthworm manure on the bodies of the earthworms is scraped off by the wet non-woven fabric in the process, and finally reaches the clean collection bin; S3: the release motor drives the release roller to rotate to release the non-woven fabric, the winding motor drives the winding roller to rotate to wind the non-woven fabric, and the wet non-woven fabric tightly attached to the surface of the horizontal partition is replaced.

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