In-situ leaching device for high-salt polluted soil

Abstract

The utility model belongs to the field of soil pollution remediation, and discloses a high-salt polluted soil in-situ leaching device which comprises a soil conveying device, a stirring device and a backflow device and is integrally supported by an iron stand. The soil conveying device is provided with a motor and a transmission gear; the stirring device is provided with an outer cylinder and an inner cylinder, the outer cylinder is provided with a feed port and a discharge port, a crushing roller is arranged in the feed port, and the lower part of the outer cylinder is also provided with a diversion trench; the inner cylinder is connected with the spiral stirring blade, rolling power of the inner cylinder and the spiral stirring blade is provided by a motor, the motor outputs power to a clutch through a transmission belt, and the clutch controls rotating speed and rotating direction; a liquid collecting box of the backflow device is connected with the flow guide groove of the outer barrel, the salt concentration of the leacheate is detected while the leacheate is recycled, backflow is carried out by opening a valve and a water pump, and when the leacheate is insufficient, a valve of a liquid storage box is opened, and a valve of the liquid collecting box is closed to add new leacheate. The device is low in repairing cost, soil and leacheate can be automatically separated, the leacheate can be repeatedly used, and the salt concentration of the leacheate is detected in real time.

Description

Technical Field

[0001] The utility model belongs to the field of soil pollution remediation, and particularly relates to an in-situ leaching device for highly saline polluted soil. Background Art

[0002] Patent CN202410418947.8 discloses a comprehensive method for treating saline-alkali pollution of irrigation area land, which divides the polluted soil plot into sub-regions, collects soil samples, obtains soil data, conducts terrain adjustment, and formulates treatment measures. By comprehensively considering multiple indicators such as soil conductivity, pH value, organic carbon content, and microbial biomass, targeted repair measures are taken and appropriate repair conditioners are selected, reducing the repair cost. Patent CN202322391723.6 discloses a land saline-alkali treatment device, including a crushing box, a conveyor, a material passing plate, and crushing rollers. The bottom of the crushing box is connected with a support frame, and a conveyor is installed inside the support frame. After adding polluted soil into the crushing box, the soil is crushed during the rotation of the crushing rollers, and after the soil is crushed, it is mixed with the desalting liquid to achieve the purpose of treating saline-alkali. Patent CN202410112177.4 discloses a device and construction method for improving saline-alkali soil by ridge tillage. The device includes a working plate, pulleys, a fixed frame, a sliding plate, etc. By setting a drill rod, a rotating shaft, a lifting plate II, an irrigation pipe, a drain pipe, and side holes, the irrigation pipe conducts gradual irrigation and deep irrigation at the position of the ditch in the saline-alkali land, achieving the purpose of reducing the salt content in the deep soil and avoiding the influence of salt on plant growth. Patent CN202410439276.3 discloses a device for preparing a biochar soil conditioner for saline-alkali soil remediation, including a box body, a top cover, a motor, a rotating shaft, a mounting shaft, a limiting groove, an extrusion plate, etc. By setting a second telescopic rod, a plugging block, a guiding block, a second spring, a first feeding hopper, an air pump, an air pipe, a feeding pipe, and a sealing cover, powder is added, and with the action of the air pump, the powder is pushed into the mixed liquid medicine, accelerating the mixing of the powder and playing a role in saving time. The above devices are mainly used for the ex-situ remediation of saline-alkali soil, which requires a certain amount of energy consumption and has a certain impact on the physical structure of the soil. How to reduce the repair cost, improve the repair efficiency, and at the same time reduce the impact on the physical structure of the soil is the starting point for the remediation of highly polluted saline-alkali soil. The utility model realizes reducing the repair cost and improving the repair efficiency by putting the highly saline polluted soil into a stirring device and fully mixing the soil and the leaching liquid in the inner cylinder, and then controlling the clutch to separate and reflux the soil and the leaching liquid. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an in-situ leaching device for highly saline polluted soil.

[0004] The technical solution of the utility model:

[0005] An in-situ leaching device for highly saline polluted soil, comprising a front soil conveying device, a middle stirring device and a rear reflux device, which is supported by an iron frame as a whole;

[0006] The front soil conveying device includes a first motor 21, a driven gear 211 and a steering gear 20. The driven gear 211 meshes with the steering gear 20. The first motor 21 is connected to the driven gear 211, and the steering gear 20 transmits the power of the first motor 21 to the conveyor belt 19;

[0007] The middle stirring device includes an outer cylinder 1, a spiral stirring blade 2, a crushing rod 5, a feed inlet 6, a spraying device 7, a clutch 8, a transmission belt 11, a second motor 12, a diversion groove 13, a discharge port 17 and an inner cylinder 18. The feed inlet 6 and the spraying device 7 are installed at the front end and upper part of the outer cylinder 1. Two continuously rotating crushing rods 5 are arranged in the feed inlet 6. The discharge port 17 is installed at the rear end and lower part of the outer cylinder 1. A rectangular groove-shaped diversion groove 13 is arranged at the lower end inside the outer cylinder 1. The second motor 12 and the clutch 8 are connected by the transmission belt 11. A spiral stirring blade 2 is installed on the rotating shaft of the clutch 8, and the tail of the rotating shaft is connected to the inner cylinder 18 through a connecting rod. The inner cylinder 18 is placed inside the outer cylinder 1. The feed inlet 6 and the spraying device 7 are both located outside the inner cylinder 18. The inner cylinder 18 is provided with neatly arranged small holes for discharging the leaching solution;

[0008] The rear reflux device includes a pipeline 3, a water pump 4, a first valve 9, a liquid storage tank 10, a second valve 14, a liquid collection tank 15, a conductivity sensor 16 and a control panel 22. The liquid storage tank 10 is placed on the platform below the clutch 8. The liquid collection tank 15 is connected to the diversion groove 13 through a pipeline below the outer cylinder 1. The liquid storage tank 10 and the liquid collection tank 15 are connected through the pipeline 3. A conductivity sensor 16 is also installed in the liquid collection tank 15 for detecting the salt concentration of the leaching solution. The pipeline 3 includes a reflux pipeline 32 and an infusion pipeline 31, and the first valve 9 and the second valve 14 for controlling the liquid storage tank 10 and the liquid collection tank 15 are respectively installed thereon. The water pump 4 is connected to the spraying device 7 and the pipeline 3 and provides water pressure for the spraying device 7. The control panel 22 is located above the liquid storage tank 10 and is used to control stirring, dehydration and reflux.

[0009] The outer cylinder 1 and the inner cylinder 18 are made of metal materials and are both cylindrical.

[0010] The spiral stirring blade 2 is arranged in a spiral shape, its rotation speed is controllable, and it is connected to the inner cylinder 18.

[0011] The liquid storage tank 10 and the liquid collection tank 15 are made of metal materials.

[0012] The conductivity sensor 16 performs real-time monitoring, and the monitoring range is 0 - 200 ms / cm.

[0013] Advantages of the present utility model: (1) The cost of soil remediation is relatively low, and the leaching solution can be reused by recycling; (2) Stirring and dehydration can be controlled according to actual conditions, which is beneficial to the effective recovery of the leaching solution; (3) The operation process can be automated; (4) While stirring, the inner cylinder also rotates, improving the stirring efficiency. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the internal structure of the stirring device and the reflux device.

[0015] Figure 2 It is a schematic diagram of the overall structure of the in-situ leaching device for highly saline polluted soil.

[0016] Figure 3 It is a three-dimensional structure schematic diagram of the reflux device.

[0017] Figure 4 It is a three-dimensional structure schematic diagram of the soil transmission device.

[0018] In the figure: 1 outer cylinder; 2 spiral stirring blades; 3 pipeline; 4 water pump; 5 crushing rod; 6 feed inlet; 7 spraying device; 8 clutch; 9 first valve; 10 liquid storage tank; 11 transmission belt; 12 second motor; 13 diversion trough; 14 second valve; 15 liquid collection tank; 16 conductivity; 17 discharge port; 18 inner cylinder; 19 conveyor belt; 20 transmission gear; 21 first motor; 211 driven gear; 31 liquid delivery pipeline; 32 reflux pipeline. Specific Embodiments

[0019] The following further describes the specific embodiments of the present utility model in conjunction with the drawings and technical solutions.

[0020] Embodiment 1

[0021] An in-situ leaching device for highly saline polluted soil, as Figure 2 shown, includes a soil transmission device, a stirring device and a reflux device.

[0022] The soil transmission device is composed of a driven gear on the first motor 21 driving the steering gear 20 from left to right to output force to the conveyor belt 19 to transport the soil to the feed inlet 6, and is supported by four support columns to enhance the stability of the device. The upper part of the outer cylinder 1 of the stirring device is connected with the feed inlet 6, and 2 crushing rods 5 are installed in the feed inlet 6 to crush the soil blocks transported by the conveyor belt 19, so that the soil can fully contact with the leaching solution and improve the leaching efficiency; when the soil enters the inner cylinder 17, the spraying device sprays the soil leaching solution, the second motor 12 is turned on, the transmission belt 11 transmits the power to the clutch 8, and the clutch drives the spiral stirring blades and the inner cylinder to rotate, so that the soil can fully contact and mix with the leaching solution.

[0023] Embodiment 2

[0024] On the basis of Embodiment 1, the clutch 8 can adjust the rotation speed and direction after the soil and the leaching solution are fully mixed, so that the leaching solution flows through the inner cylinder to the diversion groove 13. The leaching solution enters the liquid collection tank 15 through the diversion groove 13, and the soil leached in the inner cylinder is collected through the discharge port; there is a conductivity sensor 16 in the liquid collection tank 15, which can detect the salt concentration in the leaching solution. If the concentration is low, the second valve 14 and the water pump 4 can be opened to make the leaching solution flow back for reuse, effectively reducing the cost of soil remediation. If the salt solution is high, the second valve 14 is closed and the first valve 9 is opened to use a new leaching solution.

Claims

1. An in-situ leaching device for highly saline polluted soil, characterized in that, The in-situ leaching device for highly saline polluted soil includes a front soil conveying device, a middle stirring device and a rear reflux device, and is supported by an iron frame as a whole; The front soil conveying device includes a first motor (21), a driven gear (211) and a steering gear (20). The driven gear (211) meshes with the steering gear (20). The first motor (21) is connected to the driven gear (211), and the steering gear (20) transmits the power of the first motor (21) to the conveyor belt (19); The middle stirring device includes an outer cylinder (1), a spiral stirring blade (2), a crushing rod (5), a feed inlet (6), a spraying device (7), a clutch (8), a transmission belt (11), a second motor (12), a diversion groove (13), a discharge port (17) and an inner cylinder (18); a feed inlet (6) and a spraying device (7) are installed at the front end and upper part of the outer cylinder (1), and two continuously rotating crushing rods (5) are arranged in the feed inlet (6); a discharge port (17) is installed at the rear end and lower part of the outer cylinder (1); a diversion groove (13) in the shape of a cuboid groove is arranged at the lower end inside the outer cylinder (1); the second motor (12) and the clutch (8) are connected by a transmission belt (11), and a spiral stirring blade (2) is installed on the rotating shaft of the clutch (8), and the tail of the rotating shaft is connected to the inner cylinder (18) through a connecting rod; the inner cylinder (18) is placed inside the outer cylinder (1), the feed inlet (6) and the spraying device (7) are both located outside the inner cylinder (18), and the inner cylinder (18) is provided with neatly arranged small holes for discharging the leaching solution; The rear reflux device includes a pipeline (3), a water pump (4), a first valve (9), a liquid storage tank (10), a second valve (14), a liquid collection tank (15), a conductivity sensor (16) and a control panel (22); the liquid storage tank (10) is placed on the platform below the clutch (8), the liquid collection tank (15) is connected to the diversion groove (13) through a pipeline under the outer cylinder (1), the liquid storage tank (10) and the liquid collection tank (15) are connected through a pipeline (3), and a conductivity sensor (16) is also installed in the liquid collection tank (15) for detecting the salt concentration of the leaching solution; the pipeline (3) includes a reflux pipeline (32) and an infusion pipeline (31), and a first valve (9) and a second valve (14) for controlling the liquid storage tank (10) and the liquid collection tank (15) are respectively installed thereon; the water pump (4) is connected to the spraying device (7) and the pipeline (3) and provides water pressure for the spraying device (7); the control panel (22) is located above the liquid storage tank (10) and is used to control stirring, dehydration and reflux.

2. The in-situ leaching device for highly saline contaminated soil according to claim 1, characterized in that, The materials of the outer cylinder (1) and the inner cylinder (18) are metal materials, and both are cylindrical.

3. The in-situ leaching device for highly saline polluted soil according to claim 1, characterized in that, The spiral stirring blade (2) is arranged in a spiral shape, its rotation speed is controllable, and it is connected to the inner cylinder (18).

4. The in-situ leaching device for highly saline polluted soil according to claim 1, characterized in that, The materials of the liquid storage tank (10) and the liquid collection tank (15) are metal materials.

5. The in-situ leaching device for highly saline contaminated soil according to claim 1, characterized in that, The conductivity sensor (16) performs real-time monitoring, and the monitoring range is 0 - 200 ms / cm.

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