Integrated equipment suitable for treating heavy metal contaminated soil through magnetic adsorbent

Abstract

The utility model discloses integrated equipment suitable for treating heavy metal contaminated soil by using a magnetic adsorbent. The device comprises a soil feeding groove, a material feeding groove, magnetic field separation chambers, a mixing chamber and a clarifying chamber, the soil feeding groove and the material feeding groove are located above the mixing chamber, the mixing chamber is located in the clarifying chamber, and the magnetic field separation chambers are located on the upper portions of the two sides outside the mixing chamber and located on the tops of the two sides of the clarifying chamber; screw pumps are arranged at bottom outlets of the soil feeding tank and the material feeding tank; a soil inlet, a material inlet and a spraying pipe are arranged at the top of the mixing chamber, the soil inlet at the top of the mixing chamber is communicated with a screw pump outlet at the bottom of the soil feeding tank, and the material inlet at the top of the mixing chamber is communicated with a screw pump outlet at the bottom of the material feeding tank; a rotary magnetic cylinder is arranged in the magnetic field separation chamber and is connected with a recycled material storage tank; and the rotary magnetic cylinder deviates from the center of the magnetic field separation chamber. According to the equipment, heavy metals in the polluted soil are adsorbed and removed by the magnetic adsorbent, the saturated magnetic adsorbent is separated from the repaired soil, and the integration degree is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil remediation production equipment, and relates to an integrated equipment suitable for treating heavy metal polluted soil with a magnetic adsorbent. Background Art

[0002] As heavy metal pollution incidents become more and more frequent, and heavy metal pollutants pose a threat to the surrounding soil environment and organisms, researchers are eager to find suitable soil remediation technologies to reduce the hazards of heavy metal pollution. At present, the treatment methods for heavy metals in the soil environment mainly include soil leaching, stabilization / immobilization, electrokinetic remediation, and phytoremediation. Among them, the adsorption method transfers heavy metals to the surface of the adsorbent, thereby reducing the total amount of heavy metals in the contaminated soil and achieving complete remediation of the contaminated soil, which has become a commonly used remediation technology. Magnetic adsorbents are currently the most widely studied type of recyclable high-performance adsorption materials. After mixing with contaminated soil, the adsorbent combines with heavy metal ions through the high-energy adsorption sites on the surface, and can adsorb harmful heavy metals to the surface of the adsorbent. Subsequently, the magnetic material saturated with adsorption can be recovered through magnetism to achieve complete removal of heavy metals in the soil. However, there is still a lack of dedicated integrated equipment for this type of technology. A small number of them use a combination of traditional leaching equipment and magnetic separators, which have the problems of large footprint, poor pertinence, and inability to continuously remediate. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an integrated device suitable for treating heavy metal contaminated soil with a magnetic adsorbent, so as to solve the problems that the existing equipment occupies a large area, is not well targeted, and cannot be repaired continuously.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The utility model provides an integrated device suitable for treating heavy metal contaminated soil with a magnetic adsorbent, comprising a trough body, wherein the trough body is divided into a soil feeding trough, a material feeding trough, a magnetic field separation chamber, a mixing chamber and a clarifying chamber, wherein the soil feeding trough and the material feeding trough are located above the mixing chamber, the mixing chamber is located in the clarifying chamber, the magnetic field separation chamber is located at the upper parts of both sides of the outer mixing chamber and is connected to the mixing chamber, and at the same time, the magnetic field separation chamber is located at the top of both sides of the clarifying chamber; a screw pump is arranged at the bottom outlet of the soil feeding trough and the material feeding trough; a soil inlet, a material inlet and a spray pipe are arranged at the top of the mixing chamber, the soil inlet at the top of the mixing chamber is connected to the screw pump outlet at the bottom outlet of the soil feeding trough, and the material inlet at the top of the mixing chamber is connected to the screw pump outlet at the bottom outlet of the material feeding trough; a stirrer is arranged at the center of the inner part of the mixing chamber, wherein the stirrer comprises a vertical stirring rod and a horizontal stirring paddle fixed on the stirring rod, the upper part of the stirring rod passes through the top surface of the mixing chamber and is supported and fixed on the mixing chamber by a stirrer support plate; the top of the stirring rod is located at the top of the mixing chamber The magnetic field separation chamber is arranged on the outside of the clarification chamber and is connected to the stirring motor and the control system; the magnetic field separation chamber includes a gyroscopic magnetic cylinder and a recycling material storage tank; a gyroscopic magnetic cylinder is arranged in the magnetic field separation chamber, and the gyroscopic magnetic cylinder is connected to the recycling material storage tank; a sedimentation guide groove is arranged at the bottom of the magnetic field separation chamber and is connected to the clarification chamber; the magnetic field separation chamber is a transverse semi-cylindrical groove arranged on both sides of the top of the clarification chamber; the gyroscopic magnetic cylinder is a transversely arranged cylindrical cylinder with a magnet inside, and both sides of the gyroscopic magnetic cylinder are fixed on the inner wall of the magnetic field separation chamber through bearings, and the gyroscopic magnetic cylinder is connected to a driving motor, and the rotation direction of the driving motor is opposite to the material inflow direction, and the central axis of the gyroscopic magnetic cylinder is horizontally deviated from the central axis of the magnetic field separation chamber cylinder by a certain distance; the bottom of the recycling material storage tank is connected to the clarification chamber (the bottom of the recycling material storage tank is fixed to the top of the side wall of the clarification chamber), and one side is connected to the magnetic field separation chamber for fixation (one side of the recycling material storage tank is connected to the outer wall of the magnetic field separation chamber); the upper parts of both sides of the clarification chamber are provided with clear water overflow ports, and the bottom of the clarification chamber is provided with a mud discharge valve.

[0006] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: all troughs including the soil feeding trough, the material feeding trough, the magnetic field separation chamber, the mixing chamber and the clarification chamber are made of stainless steel.

[0007] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical feature: the stirring motor is a stepless speed regulating stirring motor.

[0008] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: there are two stirring paddles, which are arranged on the stirring rod at a certain distance above and below.

[0009] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: the spray pipe is a plurality of branch pipes with nozzles, which are connected by a main pipe thicker than the branch pipes and are arranged on the top of the mixing chamber.

[0010] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: the mixing chamber is a cube, and has mixing chamber overflow grooves on the upper parts of both sides, which are respectively connected to the magnetic field separation chambers on both sides.

[0011] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: the recycling material storage tank is a rectangular parallelepiped; a rubber scraper is provided between the recycling material storage tank and the rotating magnetic cylinder.

[0012] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: a discharge nozzle with a high-pressure nozzle is provided inside the recycling material storage tank; and a recycling material discharge port is provided at the bottom of the recycling material storage tank.

[0013] Furthermore, the integrated equipment suitable for treating heavy metal contaminated soil with magnetic adsorbents also has the following technical features: the upper part of the clarification chamber is a cube, and the lower part is an inverted cone formed by splicing four trapezoidal materials of the same size; clear water overflow ports are provided on both sides of the clarification chamber, and the bottom of the clarification chamber is connected to a mud discharge valve.

[0014] The beneficial effects of the utility model.

[0015] The utility model provides an integrated device suitable for treating heavy metal contaminated soil with a magnetic adsorbent, which effectively combines a mixing chamber, a magnetic field separation chamber and a clarification chamber, and simultaneously realizes processes such as the adsorption and removal of heavy metals in contaminated soil by the magnetic adsorbent, the separation of saturated magnetic adsorbent and repaired soil, and the separation of repaired soil and water; at the same time, by controlling the spraying power of the screw pump and the water pump, the mixing ratio and mixing time can be adjusted to be suitable for the repair of soil contaminated to different degrees; in addition, the utility model has a high degree of integration, a small footprint, low cost, a scientific process, a high degree of automation, and safe and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the main structure of the utility model.

[0017] FIG. 2 is a schematic diagram of the structure of the utility model from top view.

[0018] FIG. 3 is a schematic diagram of the top view of the magnetic field separation chamber 10 of the present invention.

[0019] FIG. 4 is a schematic diagram of the front structure of the magnetic field separation chamber 10 of the present invention.

[0020] 1. Soil feeding trough, 2. Spray pipe, 3. Discharge nozzle, 4. Recycled material storage trough, 5. Rubber scraper, 6. Recycled material discharge port, 7. Rotary magnetic cylinder, 8. Clean water overflow port, 9. Mixing chamber overflow trough, 10. Magnetic field separation chamber, 11. Sedimentation guide trough, 12. Agitator paddle, 13. Agitator rod, 14. Agitator motor and control system, 15. Material feeding trough, 16. Mixing chamber, 17. Clarification chamber, 18. Mud discharge valve, 19. Bearing. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0022] Example 1

[0023] like Figure 1 and Figure 2 As shown, the utility model provides an integrated device suitable for treating heavy metal contaminated soil with a magnetic adsorbent, comprising a tank body (the entire tank body is fixed on four legs, Figure 1The two vertical lines on the left and right sides below the left and right side walls of the clarification chamber 17 drawn in the figure are the two legs), and the trough body is divided into a soil feeding trough 1, a material feeding trough 15, a magnetic field separation chamber 10, a mixing chamber 16 and a clarification chamber 17. The soil feeding trough 1 and the material feeding trough 15 are located above the mixing chamber 16, and the mixing chamber 16 is located in the clarification chamber 17; there are two magnetic field separation chambers 10, which are respectively located on the upper parts of the two sides outside the mixing chamber 16, and at the same time, the two magnetic field separation chambers 10 are respectively located at the tops of the two sides of the clarification chamber 17; the mixing chamber 16 and the clarification chamber 17 are connected through the sedimentation guide trough 11 at the bottom of the magnetic field separation chamber 10; a screw pump with a diameter of 60 mm is provided at the bottom outlet of the soil feeding trough 1, and a screw pump with a diameter of 25 mm is provided at the bottom outlet of the material feeding trough 15; a gyroscopic magnetic cylinder 7 is provided in the magnetic field separation chamber 10, and the gyroscopic magnetic cylinder 7 is connected to the recycling material storage tank 4, and the recycling material storage A discharge nozzle 3 is provided in the trough 4; a sedimentation guide trough 11 is provided at the bottom of the magnetic field separation chamber 10; a soil inlet, a material inlet and a spray pipe 2 are provided at the top of the mixing chamber 16; the soil inlet at the top of the mixing chamber 16 is connected to the screw pump outlet at the bottom outlet of the soil feeding trough 1, and the material inlet at the top of the mixing chamber 16 is connected to the screw pump outlet at the bottom outlet of the material feeding trough 15; an agitator is provided at the center of the mixing chamber 16, and the agitator includes a vertical agitator rod 13 and a horizontal agitator paddle 12 fixed on the agitator rod 13, the upper part of the agitator rod 13 passes through the top surface of the mixing chamber 16 and is fixed on the mixing chamber 16 through the agitator support plate; the top of the agitator rod 13 is connected to the agitator motor and control system 14, and the agitator motor and control system 14 are located at the center outside the top of the mixing chamber 16; clean water overflow ports 8 are provided at the upper parts of both sides of the clarification chamber 17, and a mud discharge valve 18 is provided at the bottom of the clarification chamber 17.

[0024] All the tank bodies including the soil feeding tank 1, the material feeding tank 15, the magnetic field separation chamber 10, the mixing chamber 16 and the clarification chamber 17 are made of stainless steel; the stirring motor and control system 14 has a stirring rate of 200-2000 r / min, and the stirring motor is a stepless speed regulating stirring motor. There are two stirring paddles 12, each with a diameter of φ500mm, which are arranged on a stirring rod 13 with a length of 2500mm at an interval of 1200mm.

[0025] The spray pipes 2 are PP pipes (branch pipes) with nozzles of φ50 mm and a length of 1200 mm, with a total of 23 pieces connected by a PP pipe (main pipe) of φ100 mm and arranged at the top of the mixing chamber 16 .

[0026] The mixing chamber 16 is a cube of 3000*3000*3000 mm, and has 50*1500 mm mixing chamber overflow grooves 9 at the upper part of both sides (at a height of 6500 mm), which are respectively connected to the magnetic field separation chambers 10 on both sides.

[0027] like Figure 3 As shown, the magnetic field separation chamber 10 is a transverse semi-cylindrical groove with a diameter of 900mm and a length of 1500mm, which is arranged on both sides of the top of the clarification chamber 17; the gyroscopic magnetic cylinder 7 is a transversely arranged cylindrical cylinder with a diameter of 300mm and a length of 1500mm, which is connected to both sides of the magnetic field separation chamber 10 and fixed by bearings 19 (the gyroscopic magnetic cylinder 7 is a cylinder with a magnet inside, and both sides of the gyroscopic magnetic cylinder 7 are fixed to the inner wall of the magnetic field separation chamber 10 by bearings 19), and the gyroscopic magnetic cylinder 7 is connected to a driving motor (the central axis of the gyroscopic magnetic cylinder 7 is connected to the motor of the driving motor Axis connection), the entire body of the gyroscopic magnetic cylinder 7 can be rotated by driving the motor; the rotation direction of the driving motor is opposite to the direction of material inflow, and the central axis of the gyroscopic magnetic cylinder 7 is horizontally offset by 100mm from the central axis of the cylinder of the magnetic field separation chamber 10; the recycling material storage tank 4 is a 1500*150*550mm rectangular parallelepiped, the bottom of which is connected to the clarification chamber 17 (the bottom of the recycling material storage tank 4 is fixed to the top of the side wall of the clarification chamber 17), and one side is connected to the magnetic field separation chamber 10 for fixation (one side of the recycling material storage tank 4 is connected to the outer wall of the magnetic field separation chamber 10). At the same time, Figure 3 and Figure 4 As shown, a long rubber scraper 5 with a length of 1500mm is arranged between the recycling material storage tank 4 and the rotary magnetic cylinder 7, and the two ends of the rubber scraper 5 are fixed by connecting with the inner walls of both sides of the recycling material storage tank 4); a discharge nozzle 3 with a length of 1500mm and φ5mm with a high-pressure nozzle is arranged inside the recycling material storage tank 4, and the discharge nozzle 3 is fixed on the inner wall of the recycling material storage tank 4; a recycling material discharge port 6 is arranged at the bottom of the recycling material storage tank 4; the width of the sedimentation guide groove 11 is 75mm.

[0028] The upper part of the clarification chamber 17 is a cube of 5000*5000*5000mm, and the lower part is an inverted cone formed by splicing four trapezoidal materials of the same size, so that the bottom height of the clarification chamber 17 is 1625mm; the upper parts of both sides of the clarification chamber 17 (at a height of 5795mm) are provided with clean water overflow ports 8 with a diameter of 55mm, and the bottom of the clarification chamber 17 is connected to a φ300mm mud discharge valve 18.

[0029] The specific working process of the utility model is as follows: the contaminated soil and the magnetic adsorbent are added to the mixing chamber 16 by the screw pumps in the soil feeding tank 1 and the material feeding tank 15, respectively. At the same time, water is also added to the mixing chamber 16 through the spray pipe 2. According to the concentration of heavy metal pollution in the soil, the proportion of the contaminated soil, the magnetic adsorbent and the water can be determined by adjusting the power of the screw pump and the water flow rate. The stirring motor and the control system 14 are turned on, and the contaminated soil, the magnetic adsorbent and the water are stirred by the agitator to promote the complete mixing of the three in the mixing chamber 16. Subsequently, the mixture flows into the magnetic field separation chamber 10 through the overflow tank 9 of the mixing chamber. At this time, the gyroscopic magnetic cylinder 7 rotates in the opposite direction to the inflow direction of the material (mixture) under the drive of the driving motor, and the saturated magnetic adsorption material in the mixture is transferred to the surface of the gyroscopic magnetic cylinder 7. Subsequently, most of the magnetic adsorption material flows into the recycling material storage tank 4 under the high-pressure water flow of the discharge nozzle 3. The remaining part is scraped into the recycling material storage tank 4 through the rubber scraper 5 and the rotation of the gyroscopic magnetic cylinder 7, and then discharged from the system through the recycling material discharge port 6. The remaining water-soil mixture in the magnetic separation chamber 10 flows into the clarification chamber 17 through the sedimentation diversion trough 11, and the water and soil are separated after natural sedimentation in the clarification chamber 17. The separated remediated soil is deposited at the bottom of the clarification chamber 17 and can be discharged from the system through the mud discharge valve 18, while water can flow out of the system through the clean water overflow port 8.

Claims

1. An integrated device suitable for treating heavy metal contaminated soil with a magnetic adsorbent, comprising a tank body, characterized in that: The trough body is divided into a soil feeding trough, a material feeding trough, a magnetic field separation chamber, a mixing chamber and a clarifying chamber. The soil feeding trough and the material feeding trough are located above the mixing chamber, the mixing chamber is located in the clarifying chamber, the magnetic field separation chamber is located at the upper parts of both sides of the outside of the mixing chamber and is connected to the mixing chamber, and at the same time, the magnetic field separation chamber is located at the top of both sides of the clarifying chamber; screw pumps are provided at the bottom outlets of the soil feeding trough and the material feeding trough; a soil inlet, a material inlet and a spray pipe are provided at the top of the mixing chamber, the soil inlet at the top of the mixing chamber is connected to the screw pump outlet at the bottom outlet of the soil feeding trough, and the material inlet at the top of the mixing chamber is connected to the screw pump outlet at the bottom outlet of the material feeding trough; a stirrer is provided at the center of the mixing chamber, and the stirrer includes a vertical stirring rod and a stirring rod fixed on the stirring rod. A horizontal stirring paddle, the upper part of the stirring rod passes through the top surface of the mixing chamber and is fixed on the mixing chamber through the support plate of the stirrer; the top of the stirring rod is located outside the top of the mixing chamber and is connected to the stirring motor and the control system; the magnetic field separation chamber includes a gyroscopic magnetic cylinder and a recycling material storage tank, and a gyroscopic magnetic cylinder is provided in the magnetic field separation chamber, and the gyroscopic magnetic cylinder is connected to the recycling material storage tank; a sedimentation guide groove is provided at the bottom of the magnetic field separation chamber and is connected to the clarification chamber; the magnetic field separation chamber is a horizontal semi-cylindrical groove arranged on both sides of the top of the clarification chamber; the gyroscopic magnetic cylinder is a horizontally arranged cylindrical cylinder; the gyroscopic magnetic cylinder is connected to a driving motor, and the rotation direction of the driving motor is opposite to the material inflow direction; the axis of the gyroscopic magnetic cylinder is horizontally deviated from the axis of the magnetic field separation chamber cylinder by a certain distance; the upper parts of both sides of the clarification chamber are provided with clean water overflow ports, and the bottom is provided with a mud discharge valve.

2. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: All troughs including soil feeding trough, material feeding trough, magnetic field separation chamber, mixing chamber and clarification chamber are made of stainless steel.

3. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: The stirring motor is a stepless speed regulating stirring motor.

4. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: There are two stirring paddles, which are arranged on the stirring rod at a certain distance from top to bottom.

5. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: The spray pipe is composed of a plurality of branch pipes with nozzles, and the plurality of branch pipes with nozzles are connected through a main pipe which is thicker than the branch pipes.

6. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: The mixing chamber is a cube, and has mixing chamber overflow grooves on the upper parts of both sides thereof, which are respectively connected with the magnetic field separation chambers on both sides thereof.

7. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: A discharge nozzle with a high-pressure nozzle is arranged inside the recycling material storage tank, and a recycling material discharge port is arranged at the bottom.

8. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: A rubber scraper is arranged between the recycling material storage tank and the rotating magnetic cylinder.

9. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: The recycling material storage tank is a rectangular parallelepiped.

10. The integrated device for treating heavy metal contaminated soil with magnetic adsorbent according to claim 1, characterized in that: The upper part of the clarification chamber is a cube, and the lower part is an inverted cone formed by splicing four trapezoidal materials of the same size.

Images