Heavy metal polluted farmland soil remediation device

Abstract

The invention discloses a heavy metal polluted farmland soil remediation device, relates to the technical field of soil remediation, and aims to solve the technical problem that when traditional equipment stirs soil, soil blocks cannot be effectively decomposed, and consequently the size of soil particles is nonuniform, the heavy metal polluted farmland soil remediation device comprises a tank body, and the inner wall of the bottom of the tank body is fixedly connected with a frame; a mixing mechanism is arranged in the tank body; the mixing mechanism comprises a top cover, a crushing unit and a separating unit; and the top cover is fixedly connected to the top of the tank body. The stirring barrel is driven to stir soil, the protruding blocks make contact with the soil to decompose soil blocks, meanwhile, the stirring barrel is used in cooperation with the smashing unit, the coagulated soil blocks can be decomposed and fully mixed with liquid medicine, the mixed soil is upwards discharged into the packing auger through the separating unit, the mixture is outwards discharged and precipitated, and therefore the soil can be separated out. Solid and liquid are separated, so that the influence on agricultural cultivation due to excessive water content in soil is avoided, and the applicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation, and more specifically, to a device for remediating heavy metal-contaminated farmland soil. Background Art

[0002] The harm of heavy metal pollution to farmland soil cannot be underestimated. It not only reduces soil fertility and destroys soil structure, but also accumulates through the food chain, threatening human health. Therefore, the remediation of heavy metal-contaminated farmland soil is a key measure to ensure the sustainable development of agriculture, maintain ecological balance and food safety. From the perspective of remediation technology, it mainly includes three categories: physical, chemical and biological remediation. In physical remediation, the soil replacement method is to transport uncontaminated soil to the contaminated farmland and reduce the heavy metal content by mixing it with the original contaminated soil or directly replacing it. However, this method has a large workload, high cost, and is prone to destroying the original soil structure. The thermal desorption method is to use heating to volatilize or separate heavy metals, which is suitable for heavy metals with strong volatility. However, it has high energy consumption, expensive equipment, and is prone to secondary pollution if not operated properly.

[0003] At present, when traditional equipment stirs soil, it cannot effectively break up soil clods, resulting in uneven soil particle sizes, affecting the subsequent mixing effect with the liquid medicine, and reducing the effect of soil improvement. In view of this, we propose a device for remediating heavy metal-contaminated farmland soil. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for remediating heavy metal-contaminated farmland soil to solve the technical problem that traditional equipment cannot effectively break up soil clods when stirring soil, resulting in uneven soil particle sizes.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A device for remediating heavy metal-contaminated farmland soil, including a tank body, wherein a frame is fixedly connected to the inner wall of the bottom of the tank body, and a mixing mechanism is arranged inside the tank body;

[0006] The mixing mechanism includes a top cover, a crushing unit and a separation unit; the top cover is fixedly connected to the top of the tank body, the crushing unit is arranged inside the tank body, and the separation unit is arranged inside the frame;

[0007] The top of the top cover is fixedly connected to a motor, the output end of the motor is fixedly connected to a transmission rod, and the transmission rod passes through the tank body, and a mixing drum is movably sleeved inside the tank body, and an auger is fixedly sleeved on the inner wall of the mixing drum, and the auger is fixedly sleeved on the side surface of the transmission rod. The present invention stirs the soil by driving the mixing drum, and contacts the soil through the protrusions to decompose the soil blocks. At the same time, the mixing drum can decompose the coagulated soil blocks by being used in conjunction with the crushing unit, so that the soil is fully mixed with the liquid medicine, and then the mixed soil is discharged upward into the auger through the separation unit, so that the mixture is discharged outward and precipitated, and the solid and liquid are separated, so as to avoid excessive water content in the soil and affect agricultural cultivation, which is conducive to improving the applicability of the device.

[0008] Preferably, the side surface of the mixing drum is arranged with bumps.

[0009] Preferably, the pulverizing unit comprises a plurality of through holes, and the plurality of through holes are opened on the end surface of the mixing drum in a circular array.

[0010] Preferably, each of the through holes is movably connected to a grinding cylinder via a first plug rod, the bottom of each of the first plug rods is fixedly connected to a driven gear, and the driven gear is arranged at the bottom of the mixing cylinder.

[0011] Preferably, an outer gear ring is fixedly connected to the inner wall of the bottom of the tank body, and the outer gear ring is meshedly connected to the driven gear, and a connecting pipe is fixedly connected to the side surface of the tank body.

[0012] Preferably, the separation unit comprises a storage tank, a removal plate is fixedly connected to the bottom of the storage tank via a first latch, and a plurality of toggle plates are fixedly connected to the bottom of the transmission rod in a ring array.

[0013] Preferably, a drainage pipe is fixedly connected to the side surface of the storage tank, an annular partition is fixedly connected to the inner wall of the bottom of the storage tank, and the toggle plate is flush with the upper surface of the annular partition, a water storage space is formed between the annular partition and the storage tank, and a storage space is formed inside the annular partition.

[0014] Preferably, a movable ring is movably sleeved on the inner wall of the tank body, and a plurality of drain plates are fixedly connected to the movable ring and the mixing drum at the end in an annular array through second latches.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention stirs the soil by driving a mixing drum, and the soil blocks are decomposed through the contact of bumps with the soil. At the same time, the mixing drum is used in cooperation with a crushing unit to decompose the coagulated soil blocks and mix them fully with the liquid medicine. Then, the mixed soil is discharged upward into a screw conveyor through a separation unit, and the mixture is discharged outward and precipitated to separate the solid state and the liquid state, avoiding excessive water content in the soil, which affects agricultural cultivation and is beneficial to improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is an overall sectional structural schematic diagram of the present invention;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the mixing mechanism of the present invention;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the mixing mechanism of the present invention to show the bottom structure of the mixing drum;

[0021] Figure 5 is a sectional structural schematic diagram of the tank body of the present invention;

[0022] Figure 6 is a three-dimensional partial structural schematic diagram of the separation unit of the present invention;

[0023] Figure 7 is a sectional structural schematic diagram of the separation unit of the present invention.

[0024] Explanation of the reference numerals in the drawings: 1. Tank body; 2. Frame; 3. Mixing mechanism; 301. Top cover; 302. Motor; 303. Transmission rod; 304. Mixing drum; 304a. Bump; 305. Screw conveyor; 4. Crushing unit; 401. Through hole; 402. Crushing cylinder; 403. Driven gear; 404. External tooth ring; 405. Connecting pipe; 5. Separation unit; 501. Storage tank; 502. Demolition plate; 503. Stirring plate; 504. Drainage pipe; 505. Annular partition; 506. Movable ring; 507. Drainage plate. DETAILED DESCRIPTION OF THE INVENTION

[0025] As Figures 1 to 7 shown, a heavy metal contaminated farmland soil remediation device related to the present invention includes a tank body 1, a frame 2 is fixedly connected to the inner wall of the bottom of the tank body 1, and a mixing mechanism 3 is arranged inside the tank body 1;

[0026] The mixing mechanism 3 includes a top cover 301, a crushing unit 4 and a separation unit 5; the top cover 301 is fixedly connected to the top of the tank body 1, the crushing unit 4 is arranged inside the tank body 1, and the separation unit 5 is arranged inside the frame 2;

[0027] A motor 302 is fixedly connected to the top of the top cover 301. The output end of the motor 302 is fixedly connected to a transmission rod 303, and the transmission rod 303 passes through the tank body 1. A mixing drum 304 is movably sleeved inside the tank body 1. A auger 305 is fixedly sleeved on the inner wall of the mixing drum 304, and the auger 305 is fixedly sleeved on the side surface of the transmission rod 303. Protrusions 304a are arranged on the side surface of the mixing drum 304. In the present invention, the mixing drum 304 is driven to stir the soil, and the soil is contacted through the protrusions 304a to decompose the soil blocks. At the same time, by cooperating with the crushing unit 4, the mixing drum 304 can decompose the coagulated soil blocks to make them fully mixed with the liquid medicine. Then, through the separation unit 5, the mixed soil is discharged upward into the auger 305, and the mixture is discharged outwards and precipitated to separate the solid and liquid states, avoiding excessive water content in the soil and affecting agricultural cultivation, which is beneficial to improving the applicability of the device. When in use, first connect the connecting pipe 405 to the output end of the external conveying device and start it, so that the soil is conveyed into the tank body 1 through the connecting pipe 405. Then, the required repair liquid medicine is put into the tank body 1, and then through the external control system, the motor 302 is made to work. The motor 302 drives the mixing drum 304 to rotate through the transmission rod 303, and the mixing drum 304 stirs the soil through the protrusions 304a.

[0028] In an embodiment of the present invention, the crushing unit 4 includes a number of through holes 401. The number of through holes 401 are arranged in a circular array on the end surface of the mixing drum 304. A crushing cylinder 402 is movably connected to each through hole 401 through a first insertion rod. The bottom of each first insertion rod is fixedly connected to a driven gear 403, and the driven gear 403 is arranged at the bottom of the mixing drum 304. An external tooth ring 404 is fixedly connected to the inner wall of the bottom of the tank body 1, and the external tooth ring 404 is meshed with the driven gear 403. A connecting pipe 405 is fixedly communicated with the side surface of the tank body 1. During the rotation of the mixing drum 304, the crushing cylinder 402 is meshed and driven with the external tooth ring 404 through the driven gear 403, so that the crushing cylinder 402 rotates. Among them, through the cooperation of the crushing cylinder 402 and the mixing drum 304, the larger soil is decomposed, so that the soil can be fully mixed with the liquid medicine.

[0029] In the embodiment of the present invention, the separation unit 5 includes a storage tank 501, the bottom of the storage tank 501 is fixedly connected to a removal plate 502 through a first latch, the bottom of the transmission rod 303 is fixedly connected to a plurality of toggle plates 503 in an annular array, the side surface of the storage tank 501 is fixedly connected to a drainage pipe 504, the inner wall of the bottom of the storage tank 501 is fixedly connected to an annular partition 505, and the toggle plate 503 is flush with the upper surface of the annular partition 505, a water storage space is formed between the annular partition 505 and the storage tank 501, and the inside of the annular partition 505 is a storage space, and the inner wall of the tank body 1 is movably sleeved with a movable ring 506, and the movable ring A plurality of drainage plates 507 are fixedly connected in a circular array between 506 and the end mixing drum 304 through a second latch. After mixing, the mixing drum 304 rotates to drive the movable ring 506 to move, and the mixture is discharged into the mixing drum 304 through the inclined drainage plates 507, and then discharged into the storage tank 501 through the auger 305 for sedimentation. The residual liquid medicine is discharged into the water storage space through the toggle plate 503 and discharged through the drainage pipe 504. The precipitated soil is precipitated in the storage space to achieve a solid-liquid separation effect, and then the precipitated soil is taken out by manually removing the removal plate 502.

[0030] Working principle: This embodiment provides a heavy metal contaminated farmland soil remediation device. When in use, first connect the connecting pipe 405 to the output end of the external conveying device and start it, so that the soil is transported to the inside of the tank body 1 through the connecting pipe 405, and then the required remediation liquid is put into the inside of the tank body 1, and then the motor 302 is operated through the external control system. The motor 302 drives the mixing drum 304 to rotate through the transmission rod 303, and the mixing drum 304 stirs the soil through the protrusion 304a. During the rotation of the mixing drum 304, the crushing drum 402 is meshed with the outer gear ring 404 through the driven gear 403, so that the crushing drum 402 is driven. The crushing drum 402 is used in conjunction with the mixing drum 304 to decompose larger soil so that the soil can be fully mixed with the liquid medicine. After mixing, the mixing drum 304 rotates to drive the movable ring 506 to move, and the mixture is discharged into the mixing drum 304 through the inclined drainage plate 507, and then discharged into the storage tank 501 through the auger 305 for precipitation. The residual liquid medicine is discharged into the water storage space through the toggle plate 503 and discharged through the drainage pipe 504. The precipitated soil is precipitated in the storage space to achieve a solid-liquid separation effect, and then the removal plate 502 is manually removed to take out the precipitated soil.

[0031] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A device for repairing heavy metal contaminated farmland soil, characterized in that, It includes a tank body (1), the inner wall of the bottom of the tank body (1) is fixedly connected with a frame (2), and a mixing mechanism (3) is arranged inside the tank body (1); The mixing mechanism (3) includes a top cover (301), a crushing unit (4) and a separation unit (5); the top cover (301) is fixedly connected to the top of the tank body (1), the crushing unit (4) is arranged inside the tank body (1), and the separation unit (5) is arranged inside the frame (2); A motor (302) is fixedly connected to the top of the top cover (301), the output end of the motor (302) is fixedly connected with a transmission rod (303), and the transmission rod (303) passes through the tank body (1). A stirring cylinder (304) is movably sleeved inside the tank body (1), and an auger (305) is fixedly sleeved on the inner wall of the stirring cylinder (304), and the auger (305) is fixedly sleeved on the side surface of the transmission rod (303).

2. The heavy metal contaminated farmland soil remediation device according to claim 1, characterized in that, Convex blocks (304a) are arranged on the side surface of the stirring cylinder (304).

3. The heavy metal contaminated farmland soil remediation device according to claim 2, wherein, The crushing unit (4) includes a number of through holes (401), and the through holes (401) are arranged in an annular array on the end surface of the stirring cylinder (304).

4. A heavy metal contaminated farmland soil remediation device according to claim 3, characterized in that, A crushing cylinder (402) is movably connected to each through hole (401) through a first insertion rod, and a driven gear (403) is fixedly connected to the bottom of each first insertion rod, and the driven gear (403) is arranged at the bottom of the stirring cylinder (304).

5. A heavy metal contaminated farmland soil remediation device according to claim 4, characterized in that, An external tooth ring (404) is fixedly connected to the inner wall of the bottom of the tank body (1), and the external tooth ring (404) is meshed with the driven gear (403). A connecting pipe (405) is fixedly communicated with the side surface of the tank body (1).

6. The heavy metal contaminated farmland soil remediation device according to claim 5, characterized in that, The separation unit (5) includes a storage tank (501), a removal plate (502) is fixedly connected to the bottom of the storage tank (501) through a first pin, and a number of dialing plates (503) are fixedly connected to the bottom of the transmission rod (303) in an annular array.

7. A heavy metal contaminated farmland soil remediation device according to claim 6, characterized in that, A drain pipe (504) is fixedly connected to the side surface of the storage tank (501), an annular partition plate (505) is fixedly connected to the inner wall of the bottom of the storage tank (501), and the dialing plate (503) is flush with the upper surface of the annular partition plate (505). A water storage space is formed between the annular partition plate (505) and the storage tank (501), and a storage space is formed inside the annular partition plate (505).

8. A heavy metal contaminated farmland soil remediation device according to claim 7, characterized in that, A movable ring (506) is movably sleeved on the inner wall of the tank body (1), and a number of drain plates (507) are fixedly connected between the movable ring (506) and the end stirring cylinder (304) in an annular array through second pins.

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