Remediation device for heavy metal contaminated soil

Abstract

The utility model discloses a heavy metal contaminated soil remediation device which comprises a winnowing box and a leaching tank, a crushing roller is installed inside the top end of the winnowing box, a first motor is installed on the outer side of the winnowing box, the crushing roller is in transmission connection with the first motor, an air blower is installed on one side of the winnowing box, and a second motor is installed on the other side of the winnowing box. A through hole is formed in the other side of the winnowing box, the through hole and the air blower are located on the same straight line, the leaching tank is arranged on one side of the winnowing box, a material guiding channel is arranged between the winnowing box and the leaching tank, one end of the material guiding channel is connected with the through hole, and a leaching chamber and a motor chamber are arranged in the leaching tank. Crushed soil particles are screened by arranging the winnowing box, the soil particles with small sizes can be blown into the leaching chamber, the soil particles with large sizes can fall to the bottom of the winnowing box, the soil particles do not need to be screened with the help of a sieve plate, the blocking fault cannot be caused, and normal operation of the device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of soil remediation, in particular to a device for remediating heavy metal polluted soil. Background Art

[0002] Heavy metal pollution in soil is a more prominent and common form of pollution among inorganic soil pollution. Heavy metal pollution in soil refers to the phenomenon that the content of heavy metal elements in the soil is significantly higher than its natural background value, causing ecological damage and deterioration of environmental quality. The harm of heavy metal pollution in soil depends not only on the total amount of heavy metals in the soil, but also on its existence form and the proportion of each form. Among them, the active toxicity of heavy metal elements in water-soluble and exchangeable states is the greatest, and the active toxicity of residual states is the lowest. Heavy metals in ion-exchange states are highly active and toxic in the soil environment, easily absorbed by plants, and easily adsorbed, leached or reacted by plants to other forms. Excessive heavy metal content in the soil seriously endangers the living environment of human beings and has a negative impact on the entire natural geographical environment. Therefore, when heavy metal pollution occurs in the soil, it must be promptly managed and repaired.

[0003] At present, there are three main types of soil heavy metal pollution remediation: physical method, chemical method and biological method. The physical method has good effect and high efficiency in treating soil heavy metal pollution, but it often cannot completely solve the heavy metal pollution, but only transfers the pollution and needs to be treated again. To treat soil heavy metal pollution by chemical method, it is necessary to choose a suitable treatment method, which has high treatment efficiency, but also high treatment cost and may cause secondary pollution. If the in-situ leaching method is used, the flow direction of groundwater must be clarified to avoid groundwater pollution. The biological method is used for soil heavy metal pollution control, which has low cost, will not cause secondary pollution, and can also repair the mine ecosystem while treating heavy metals. However, its heavy metal treatment efficiency is low and the effect is poor, and it cannot effectively complete the treatment of soil heavy metal pollution.

[0004] When some existing soil remediation devices are in use, a sieve plate is provided on the device, through which the crushed soil is screened. However, the sieve plate is easily clogged by larger soil particles, which has an adverse effect on the subsequent use of the device.

[0005] For example, a device for remediating soil contaminated by heavy metals is disclosed in the announcement number CN217191622U. This patent does not require a separate crushing mechanism. Under the combined action of two sets of springs, two layers of screen plates and a feeding motor, the soil can be dispersed and the soil and stone can be separated. The discharge of stones is smoother, and only the discharge door needs to be opened.

[0006] Although this patent uses a cylinder to squeeze the pressure plate toward the screen plate, large pieces of soil are squeezed and dispersed under the elastic force of the spring, the vibration of the feeding motor and the back and forth lifting and squeezing of the pressure plate, but the soil cannot be evenly broken into particles of the same size, and the screen plate can be easily blocked by larger soil particles, which has an adverse effect on the subsequent use of the device.

[0007] Therefore, it is necessary to invent a heavy metal contaminated soil repair device to solve the above problems. Utility Model Content

[0008] The utility model aims to provide a heavy metal contaminated soil repair device to solve the problems in the above technology.

[0009] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a repair device for heavy metal contaminated soil, comprising an air separation box and a leaching tank, a crushing roller is installed inside the top of the air separation box, a No. 1 motor is installed outside the air separation box, the crushing roller is transmission-connected to the No. 1 motor, a blower is installed on one side of the air separation box, a through hole is opened on the other side of the air separation box, the through hole and the blower are located on the same straight line, the leaching tank is arranged on one side of the air separation box, a material guide channel is arranged between the air separation box and the leaching tank, one end of the material guide channel is connected to the through hole, a leaching chamber and a motor chamber are arranged inside the leaching tank, and the other end of the material guide channel is connected to the inside of the leaching chamber.

[0010] Smaller soil particles can be blown into the leaching chamber by a blower.

[0011] Preferably, a material collecting plate is fixedly connected to one side of the inner wall of the air separation box close to the through hole, and the material collecting plate is arranged at an angle.

[0012] Larger soil particles will fall on the surface of the collecting plate and slide down the slope of the collecting plate to the bottom of the air separation box.

[0013] Preferably, a discharge port is provided on a side of the bottom end of the air separation box away from the material collecting plate, and a downward-flipping door is installed at the discharge port.

[0014] The soil collected at the bottom of the winnowing box can be cleaned by opening the lower flap.

[0015] Preferably, a sealing cover is installed on the top of the air separation box, and the inside of the sealing cover is filled with sound insulation cotton.

[0016] The air separation box is closed by a sealing cover to prevent dust from being blown out when the soil is crushed, and to prevent noise from being transmitted outward.

[0017] Preferably, a feed pipe is fixedly connected to the top of the elution tank, and a bottom end of the feed pipe extends to the inside of the elution chamber and is fixedly connected to a spray head.

[0018] The spray liquid is injected into the feed pipe, and then the spray liquid is evenly sprayed outward with the help of the spray head.

[0019] Preferably, the motor room is arranged directly below the elution chamber, a No. 2 motor is installed inside the motor room, a feed pipe is fixedly connected to the outside of the elution tank, and one end of the feed pipe is communicated with the inside of the elution chamber.

[0020] The mixed material is discharged outwards through the closed discharge pipe.

[0021] Preferably, a rotating shaft is provided inside the elution chamber, the bottom end of the rotating shaft extends to the inside of the motor chamber and is transmission-connected to the second motor, and a stirring blade is fixedly connected to the surface of the rotating shaft.

[0022] The rotating shaft can be driven by the No. 2 motor to drive the stirring blades to rotate, and the soil particles and the elution liquid are stirred and mixed by the stirring blades.

[0023] Preferably, a scraper is fixedly connected to the surface of the rotating shaft via a cross bar, and one end of the scraper is in contact with the inner wall of the rinsing chamber.

[0024] The No. 2 motor can drive the rotating shaft to drive the scraper to rotate, and the scraper is used to scrape off the materials attached to the wall of the leaching chamber.

[0025] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0026] 1. The crushed soil particles are screened by setting up a wind selection box. Smaller soil particles will be blown into the leaching chamber, while larger soil particles will fall to the bottom of the wind selection box. There is no need to use a sieve plate to screen the soil particles, which will not cause blockage and is conducive to ensuring the normal operation of the device.

[0027] 2. When soil particles enter the elution chamber, the elution liquid is evenly sprayed out through the spray head. During the falling process, the elution liquid comes into contact with the soil particles blown in, which is conducive to promoting uniform mixing between soil particles and the spray liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model from the first perspective;

[0029] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0030] Figure 3 It is a structural sectional view of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the wind selection box of the utility model.

[0032] Description of reference numerals:

[0033] 1. Air separation box; 2. Rinsing tank; 3. Crushing roller; 4. No. 1 motor; 5. Blower; 6. Material guide channel; 7. Material collecting plate; 8. Lower flap door; 9. Sealing cover plate; 10. Material conveying pipe; 11. Sprinkler head; 12. No. 2 motor; 13. Material discharge pipe; 14. Rotating shaft; 15. Mixing blade; 16. Scraper. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] The utility model provides Figure 1-4 A heavy metal contaminated soil remediation device shown in the figure includes an air separation box 1 and a leaching tank 2, a crushing roller 3 is installed inside the top of the air separation box 1, a No. 1 motor 4 is installed on the outside of the air separation box 1, the crushing roller 3 is transmission-connected to the No. 1 motor 4, a blower 5 is installed on one side of the air separation box 1, a through hole is opened on the other side of the air separation box 1, the through hole and the blower 5 are located on the same straight line, the leaching tank 2 is arranged on one side of the air separation box 1, a material guide channel 6 is arranged between the air separation box 1 and the leaching tank 2, one end of the material guide channel 6 is connected to the through hole, a leaching chamber and a motor chamber are arranged inside the leaching tank 2, and the other end of the material guide channel 6 is connected to the inside of the leaching chamber.

[0036] In one aspect of the present embodiment, a material collecting plate 7 is fixedly connected to one side of the inner wall of the air separation box 1 near the through hole, and the material collecting plate 7 is inclined. A discharge port is opened on the side of the bottom end of the air separation box 1 away from the material collecting plate 7, and a downward flip door 8 is installed at the discharge port. A sealing cover plate 9 is installed on the top of the air separation box 1, and the inside of the sealing cover plate 9 is filled with sound insulation cotton. A feed pipe 10 is fixedly connected to the top of the elution tank 2, and the bottom end of the feed pipe 10 extends to the inside of the elution chamber and is fixedly connected to a spray head 11. The motor room is provided with It is placed directly below the elution chamber, and a No. 2 motor 12 is installed inside the motor chamber. A feed pipe 13 is fixedly connected to the outside of the elution tank 2, and one end of the feed pipe 13 is communicated with the inside of the elution chamber. A rotating shaft 14 is arranged inside the elution chamber, and the bottom end of the rotating shaft 14 extends to the inside of the motor chamber and is transmission-connected to the No. 2 motor 12. A stirring blade 15 is fixedly connected to the surface of the rotating shaft 14, and a scraper 16 is fixedly connected to the surface of the rotating shaft 14 through a cross bar, and one end of the scraper 16 is in contact with the inner wall of the elution chamber.

[0037] Working principle of this utility model:

[0038] Refer to the instruction manual Figure 1-4When using the utility model, first open the sealing cover plate 9, and put a certain amount of soil into the air separation box 1, then close the sealing cover plate 9, and start the No. 1 motor 4 and the blower 5, and drive the crushing roller 3 to crush the soil through the No. 1 motor 4, and the crushed soil particles fall downward under the action of gravity. In the falling process, the soil particles are blown to the through hole by the blower 5, and the smaller soil particles are carried by the air flow through the through hole and the material guide channel 6, and finally enter the elution chamber of the elution tank 2, while the larger soil particles fall on the collecting plate 7 under the dual action of gravity and air flow. As the soil particles gradually accumulate, this part of the soil finally slides down the slope of the collecting plate 7 to the bottom of the air separation box 1, and the soil can be cleaned by opening the lower flip door 8;

[0039] When soil particles enter the elution chamber, the elution liquid is injected into the feed pipe 10 and evenly sprayed out through the spray head 11. During the falling process, the elution liquid comes into contact with the soil particles blown in. The soil particles are moistened by the elution liquid and fall to the bottom of the elution chamber. The rotating shaft 14 is driven by the No. 2 motor 12 to drive the stirring blade 15 and the scraper 16 to rotate. The stirring blade 15 stirs and mixes the soil particles and the elution liquid, and the scraper 16 scrapes off the material attached to the inner wall of the elution chamber. After the elution operation is completed, the discharge pipe 13 is opened to discharge the mixed material.

Claims

1. A heavy metal contaminated soil remediation device, comprising an air separation box (1) and a leaching tank (2), characterized in that: A crushing roller (3) is installed inside the top of the air separation box (1), and a No. 1 motor (4) is installed outside the air separation box (1). The crushing roller (3) is connected to the No. 1 motor (4) in a transmission manner. A blower (5) is installed on one side of the air separation box (1), and a through hole is opened on the other side of the air separation box (1). The through hole and the blower (5) are located on the same straight line. The leaching tank (2) is arranged on one side of the air separation box (1), and a material guide channel (6) is arranged between the air separation box (1) and the leaching tank (2). One end of the material guide channel (6) is connected to the through hole. A leaching chamber and a motor chamber are arranged inside the leaching tank (2), and the other end of the material guide channel (6) is connected to the inside of the leaching chamber.

2. The device for repairing heavy metal contaminated soil according to claim 1, characterized in that: A material collecting plate (7) is fixedly connected to one side of the inner wall of the air separation box (1) close to the through hole, and the material collecting plate (7) is arranged at an angle.

3. The device for repairing heavy metal contaminated soil according to claim 2, characterized in that: A discharge port is provided on a side of the bottom end of the air separation box (1) away from the material collecting plate (7), and a downward-turning door (8) is installed at the discharge port.

4. The device for remediating heavy metal contaminated soil according to claim 1, characterized in that: A sealing cover plate (9) is installed on the top of the air separation box (1), and the interior of the sealing cover plate (9) is filled with sound insulation cotton.

5. The device for repairing heavy metal contaminated soil according to claim 1, characterized in that: The top of the elution tank (2) is fixedly connected to a material delivery pipe (10), and the bottom end of the material delivery pipe (10) extends into the interior of the elution chamber and is fixedly connected to a spray head (11).

6. The device for remediating heavy metal contaminated soil according to claim 1, characterized in that: The motor room is arranged directly below the elution chamber, a second motor (12) is installed inside the motor room, a feed pipe (13) is fixedly connected to the outside of the elution tank (2), and one end of the feed pipe (13) is communicated with the inside of the elution chamber.

7. The device for remediating heavy metal contaminated soil according to claim 6, characterized in that: A rotating shaft (14) is arranged inside the elution chamber, the bottom end of the rotating shaft (14) extends to the inside of the motor chamber and is transmission-connected to the second motor (12), and a stirring blade (15) is fixedly connected to the surface of the rotating shaft (14).

8. The device for remediating heavy metal contaminated soil according to claim 7, characterized in that: The surface of the rotating shaft (14) is fixedly connected to a scraper (16) via a cross bar, and one end of the scraper (16) is in contact with the inner wall of the elution chamber.

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