Dry-method magnetic attraction repairing equipment for heavy metal pollution muck mixture

Abstract

The invention relates to the technical field of heavy metal contaminated soil remediation, and provides heavy metal contaminated muck mixture dry method magnetic attraction remediation equipment which comprises a vibration screening device, a grading conveying device and a magnetic attraction device. A discharging area of the multi-stage screening area is located above the grading conveying device, the magnetic attraction device comprises a magnetic attraction unit and an annular sorting belt, the magnetic attraction unit is arranged on the inner side of the annular sorting belt, and a part of the annular sorting belt and the magnetic attraction unit are located above one end of an outlet of the grading conveying device. And the other part of the annular sorting belt is positioned on the outer side of one end of the outlet of the grading conveying device. By means of the technical scheme, the problems that in the prior art, a heavy metal muck mixture contaminated soil chemical agent remediation method cannot be applied, and corresponding equipment for efficiently remediating the contaminated soil is lacked are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy metal contaminated soil remediation, and in particular to dry magnetic adsorption remediation equipment for heavy metal contaminated soil mixture. Background Art

[0002] Heavy metal pollutants in the soil mainly include cadmium, chromium, nickel, lead, copper and zinc. In the existing technology, the common method for treating heavy metal contaminated soil is chemical remediation. The chemical remediation method mainly involves sampling and analyzing the soil to determine the type of heavy metal pollution, and then mixing the corresponding soil remediation agent. The remediation agent changes the chemical properties of the heavy metals in the soil, thereby achieving soil remediation. Generally, the soil to be remediated needs to be turned over in advance and then sprayed with the remediation agent. Since the form of heavy metal pollution in the soil is inconsistent, some heavy metal pollution exists in the soil in the form of slag mixture, and chemical agents cannot effectively remove it. Therefore, this method cannot be promoted in large-scale heavy metal slag mixture contaminated soil areas. Based on the above problems, a new heavy metal slag mixture remediation equipment is needed. Summary of the Invention

[0003] The present invention proposes a dry magnetic remediation device for heavy metal contaminated slag-soil mixtures, which solves the problem in the prior art that chemical remediation methods for soil contaminated by heavy metal slag-soil mixtures are not applicable and there is a lack of corresponding equipment for efficiently remediating contaminated soil.

[0004] The technical solutions of the present invention are as follows:

[0005] A dry magnetic remediation device for a heavy metal-contaminated slag mixture, the magnetic remediation device comprising a vibrating screening device, a grading conveying device and a magnetic device, wherein the vibrating screening device is provided with a multi-stage screening zone, the discharge zone of the multi-stage screening zone is located above the grading conveying device, the magnetic device comprises a magnetic unit and an annular sorting belt, the magnetic unit is arranged on the inner side of the annular sorting belt, a part of the annular sorting belt and the magnetic unit are located above one end of the outlet of the grading conveying device, and the other part of the annular sorting belt is located outside one end of the outlet of the grading conveying device.

[0006] The grading conveying device includes an annular conveyor belt, a conveying drive unit and an elastic belt unit. The conveying drive unit drives the annular conveyor belt to circulate. The annular conveyor belt is divided into a receiving area and a magnetic attraction area. The receiving area is located below the multi-stage screening area. The magnetic attraction area is located on one side of the outlet end of the annular conveyor belt and below the magnetic attraction unit. The elastic belt unit is arranged on the inner side of the annular conveyor belt and below the magnetic attraction area.

[0007] The elastic belt unit is configured as a cylindrical roller, a long boss is provided on the cylindrical roller along the axial direction, and a plurality of long bosses are provided at intervals on the cylindrical roller in the circumferential direction. The rotation speed of the cylindrical roller is faster than that of the annular conveyor belt.

[0008] The screening particle sizes of the multi-stage screening zones gradually increase.

[0009] The vibrating screening device includes a screening channel, a shock-absorbing base, a vibration driving device and multiple screening plates. The screening channel is arranged on the shock-absorbing base. A feeding port is provided above one end of the screening channel. The screening channel is inclined and one end of the feeding port is higher than the other end. The vibration driving device is provided on the screening channel to vibrate the screening channel. The screening plates are arranged in sequence in the screening channel. The height of the screening plates in the screening channel decreases in sequence. Each of the screening plates forms a first-level screening area.

[0010] The vibration driving device includes a vibration motor, a rotating shaft and an eccentric block. The rotating shaft passes through the screening channel and is connected to the vibration motor. The eccentric blocks are arranged at both ends of the rotating shaft.

[0011] The grading conveying device includes side baffles, which are arranged on both sides of the endless conveyor belt and located on the upper surface of the endless conveyor belt.

[0012] The magnetic attraction device further includes a receiving bucket, which is located below the outlet end of the annular sorting belt.

[0013] The working principle and beneficial effects of the present invention are:

[0014] The present invention discloses a dry magnetic remediation device for heavy metal contaminated slag-soil mixture, which screens soil containing heavy metal contaminated slag-soil mixture through a vibrating screening device, screens out the soil from multiple screening areas according to different particle sizes and drops the soil to a grading conveying device, and the grading conveying device sequentially conveys the screened soil particles of different particle sizes to the bottom of the magnetic device, wherein the magnetic device is an annular sorting belt with a built-in magnetic unit, and one part of the annular sorting belt is above one end of the outlet of the grading conveying device, and with the help of the magnetic unit, the other part is outside one end of the outlet of the grading conveying device, so that the heavy metal contaminated soil mixture is adsorbed onto the lower surface of the annular sorting belt, and as the annular sorting belt is driven, the lower surface of the annular sorting belt adsorbed with the heavy metal contaminated soil mixture moves to a range without the magnetic unit, and the heavy metal contaminated soil mixture falls, and the grading conveying device transports the cleaned and repaired soil out and recycles it to realize dry remediation, thereby solving the problem that the chemical remediation method for soil contaminated by heavy metal contaminated soil mixture in the prior art is not applicable and there is a lack of corresponding equipment for efficiently remediating contaminated soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the overall axonometric structure of the repair equipment of the present invention Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall axonometric structure of the repair equipment of the present invention Figure 2 ;

[0018] Figure 3 Schematic diagram of the internal structure of the vibration screening device of the present invention;

[0019] Figure 4 This is an axonometric structural diagram of the grading conveying device of the present invention;

[0020] Figure 5 This is a schematic diagram of the layout structure of the graded conveying device and the magnetic suction device of the present invention;

[0021] In the figure: 1. Vibration screening device, 2. Grading conveying device, 3. Magnetic device, 4. Magnetic unit, 5. Annular sorting belt, 6. Annular conveyor belt, 7. Conveying drive unit, 8. Elastic belt unit, 9. Long boss, 10. Screening channel, 11. Shock-absorbing base, 12. Vibration drive device, 13. Screening plate, 14. Feeding port, 15. Vibration motor, 16. Rotating shaft, 17. Eccentric block, 18. Side baffle, 19. Storage bucket. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 5 As shown, this embodiment proposes a dry magnetic remediation device for heavy metal contaminated slag mixture, the magnetic remediation device comprising a vibrating screening device 1, a grading conveying device 2 and a magnetic device 3, wherein the vibrating screening device 1 is provided with a multi-stage screening zone, the discharge zone of the multi-stage screening zone is located above the grading conveying device 2, the magnetic device 3 comprises a magnetic unit 4 and an annular sorting belt 5, the magnetic unit 4 is arranged on the inner side of the annular sorting belt 5, a part of the annular sorting belt 5 and the magnetic unit 4 are located above one end of the outlet of the grading conveying device 2, and the other part of the annular sorting belt 5 is located outside one end of the outlet of the grading conveying device 2.

[0024] In this embodiment, a dry magnetic remediation device for heavy metal-contaminated slag-soil mixture is disclosed, which screens soil containing heavy metal-contaminated slag-soil mixture through a vibrating screening device 1, and screens out the soil from multiple screening areas according to different particle sizes and drops it to a graded conveying device 2. The graded conveying device 2 sequentially conveys the screened soil particles of different particle sizes to the bottom of a magnetic device 3. The magnetic device 3 is an annular sorting belt 5 with a built-in magnetic unit 4. The magnetic unit 4 can be a permanent magnet or an electromagnet, etc., and one part of the annular sorting belt 5 is above one end of the outlet of the graded conveying device 2. With the help of the magnetic unit 4, the other part is outside one end of the outlet of the graded conveying device 2, and the heavy metal-contaminated slag-soil mixture is adsorbed onto the lower surface of the annular sorting belt 5. As the annular sorting belt 5 is driven, the lower surface of the annular sorting belt 5 adsorbed with the heavy metal-contaminated slag mixture moves to a range without the magnetic unit 4, and the heavy metal-contaminated slag mixture falls. The graded conveying device 2 transports the cleaned and repaired soil out and recycles it to achieve dry remediation.

[0025] The grading conveying device 2 includes an annular conveyor belt 6, a conveying drive unit 7 and an elastic belt unit 8. The conveying drive unit 7 drives the annular conveyor belt 6 to circulate. The annular conveyor belt 6 is divided into a receiving area and a magnetic attraction area. The receiving area is located below the multi-stage screening area. The magnetic attraction area is located on one side of the outlet end of the annular conveyor belt 6 and below the magnetic attraction unit 4. The elastic belt unit 8 is arranged on the inner side of the annular conveyor belt 6 and below the magnetic attraction area.

[0026] On the basis of the above embodiment, the grading conveying device 2 is powered by the conveying drive unit 7, which drives the annular conveyor belt 6 to rotate in a circular motion to realize conveying, wherein the conveying drive unit 7 can exemplarily adopt a motor to drive the active roller to rotate, and the active roller and the driven roller respectively stretch and tighten the annular conveyor belt 6 at both ends, and a plurality of auxiliary support rollers can be arranged between the active roller and the driven roller. The annular conveyor belt 6 can be divided into a receiving area and a magnetic attraction area according to its position. The receiving area is located below the multi-stage screening area. After the vibrating screening device 1 screens the heavy metal slag soil mixture, soil of different particle sizes falls onto the receiving area of the annular conveyor belt 6. The part of the annular conveyor belt 6 located at the magnetic attraction unit 4 is the magnetic attraction area. In this area, under the action of the magnetic attraction unit 4, the heavy metal slag soil mixture is magnetically separated from the soil to realize soil remediation. Furthermore, the surface of the endless conveyor belt 6 can be provided with raised patterns to improve the stability of the soil it carries. At the same time, the endless conveyor belt 6 can be installed in a variety of ways, such as horizontally or inclined. An elastic belt unit 8 is provided below the magnetic area. The elastic belt unit 8 can apply intermittent force to the lower surface of the conveyor belt below the endless conveyor belt 6, so that the soil located on the magnetic area can be bounced up. Unlike the magnetic unit 4 that absorbs the soil that is statically spread on the conveyor belt, the elastic belt unit 8 can, on the one hand, more efficiently absorb heavy metal slag within the limited time that the endless conveyor belt 6 passes through the magnetic unit 4. On the other hand, the heavy metal slag can be flipped to the soil surface through continuous bouncing, thereby improving the adsorption and sorting efficiency and repairing the contaminated soil to a great extent.

[0027] The elastic belt unit 8 is configured as a cylindrical roller, on which a long boss 9 is provided in the axial direction, and a plurality of long bosses 9 are provided at intervals in the circumferential direction. The rotation speed of the cylindrical roller is faster than that of the annular conveyor belt 6 .

[0028] On the basis of the above embodiment, the structural form of the elastic belt unit 8 can be set to be a long boss 9 provided on the cylindrical roller so as to intermittently impact the lower surface of the endless conveyor belt 6 so as to suddenly produce an impact on the surface. A plurality of long bosses 9 are provided on the circumference of the cylindrical roller. The cylindrical roller can be driven by a driving device such as a motor and run at a speed exceeding that of the endless conveyor belt 6. The long boss 9 on the cylindrical roller can knock on the endless conveyor belt 6 to realize the elastic belt function. It should be noted that the structural form of the elastic belt unit 8 can also adopt other structures, and any structural form based on the technical concept of the present application is acceptable.

[0029] The screening particle sizes of the multi-stage screening zones gradually increase.

[0030] On the basis of the above embodiment, in the multi-stage screening area, the contaminated soil of the heavy metal slag mixture moves in a certain direction and is vibrated and screened. For example, the multi-stage screening area can be set to an inclined form, and the contaminated soil is screened step by step along the inclined angle. Along the direction of movement during soil screening, the screening particle size of the multi-stage screening area gradually increases, so that soil of different particle sizes falls from different levels of screening areas and only falls onto the grading conveying device 2.

[0031] The vibrating screening device 1 includes a screening channel 10, a cushioning base 11, a vibration driving device 12 and a plurality of screening plates 13. The screening channel 10 is arranged on the cushioning base 11. A feeding port 14 is provided above one end of the screening channel 10. The screening channel 10 is arranged at an angle and one end of the feeding port 14 is higher than the other end. The vibration driving device 12 is provided on the screening channel 10 to vibrate the screening channel 10. The screening plates 13 are arranged in sequence in the screening channel 10. The height of the screening plates 13 in the screening channel 10 decreases in sequence, and each screening plate 13 forms a first-level screening area.

[0032] On the basis of the above embodiments, the specific structural form of the vibration screening device 1 can be referred to as follows. First, a shock-absorbing base 11 is set as a support. The shock-absorbing base 11 can be multiple support columns. A shock-absorbing component is set at the upper load-bearing end of the support column. For example, it can be a spring with relatively large rigidity, so that it is sufficient to support the screening channel 10. The screening channel 10 is set to an inclined structure. A feeding port 14 is set at one end of the screening channel 10, and the contaminated soil is added to the screening channel 10 from the feeding port 14. A plurality of screening plates 13 are set in the screening channel 10, and each screening plate 13 corresponds to a first-level screening area, thereby forming a multi-level screening area. The arrangement of the screening plates 13 in the screening channel 10 can be arranged according to design requirements. A vibration driving device 12 is provided on the screening channel 10 to make the screening channel 10 in a vibrating state, and the soil can be screened on the screening plates 13.

[0033] The vibration driving device 12 includes a vibration motor 15 , a rotating shaft 16 and an eccentric mass 17 . The rotating shaft 16 passes through the screening channel 10 and is connected to the vibration motor 15 . The eccentric mass 17 is provided at both ends of the rotating shaft 16 .

[0034] Based on the above embodiment, the vibration driving device 12 can be a vibration motor 15 that drives the rotating shaft 16 to rotate. The rotating shaft 16 is arranged on the screening channel 10, and eccentric blocks 17 are arranged at both ends of the rotating shaft 16. The rotating shaft 16 drives the eccentric blocks 17 to rotate, thereby driving the screening channel 10 to vibrate.

[0035] The grading conveying device 2 includes side baffles 18 , which are arranged on both sides of the endless conveyor belt 6 and located on the upper surface of the endless conveyor belt 6 .

[0036] On the basis of the above embodiment, the grading conveying device 2 is further provided with side baffles 18. The side baffles 18 are provided on both sides of the supporting surface of the endless conveyor belt 6 and are located on the upper surface to prevent soil from falling outside.

[0037] The magnetic attraction device 3 further includes a receiving bucket 19 , which is located below the outlet end of the annular sorting belt 5 .

[0038] On the basis of the above embodiment, a receiving bucket 19 is provided below the outlet end of the annular sorting belt 5 for collecting fallen heavy metal pollutants.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dry magnetic adsorption repair device for heavy metal contaminated soil mixture, characterized in that: The magnetic repair equipment comprises a vibration screening device (1), a grading conveying device (2) and a magnetic device (3), wherein the vibration screening device (1) is provided with a multi-stage screening area, and the discharge area of the multi-stage screening area is located above the grading conveying device (2); the magnetic device (3) comprises a magnetic unit (4) and an annular sorting belt (5), and the magnetic unit (4) is arranged on the inner side of the annular sorting belt (5), a part of the annular sorting belt (5) and the magnetic unit (4) are located above one end of the outlet of the grading conveying device (2), and the other part of the annular sorting belt (5) is located outside one end of the outlet of the grading conveying device (2).

2. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 1 is characterized in that: The grading conveying device (2) comprises an annular conveyor belt (6), a conveying drive unit (7) and an elastic belt unit (8); the conveying drive unit (7) drives the annular conveyor belt (6) to circulate; the annular conveyor belt (6) is divided into a receiving area and a magnetic attraction area; the receiving area is located below the multi-stage screening area; the magnetic attraction area is located on one side of the outlet end of the annular conveyor belt (6) and below the magnetic attraction unit (4); the elastic belt unit (8) is arranged on the inner side of the annular conveyor belt (6) and below the magnetic attraction area.

3. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 2 is characterized in that: The elastic belt unit (8) is configured as a cylindrical roller, a long boss (9) is provided on the cylindrical roller in the axial direction, and a plurality of long bosses (9) are provided at intervals in the circumferential direction of the cylindrical roller, and the rotation speed of the cylindrical roller is faster than the rotation speed of the annular conveyor belt (6).

4. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 1, characterized in that: The screening particle sizes of the multi-stage screening zones gradually increase.

5. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 4 is characterized in that: The vibrating screening device (1) comprises a screening channel (10), a damping base (11), a vibration driving device (12) and a plurality of screening plates (13); the screening channel (10) is arranged on the damping base (11); a feeding port (14) is arranged above one end of the screening channel (10); the screening channel (10) is arranged at an angle and one end of the feeding port (14) is higher than the other end; the vibration driving device (12) is arranged on the screening channel (10) to vibrate the screening channel (10); the screening plates (13) are arranged in sequence in the screening channel (10); the height of the screening plates (13) in the screening channel (10) decreases in sequence; and each screening plate (13) forms a primary screening area.

6. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 5, characterized in that: The vibration driving device (12) comprises a vibration motor (15), a rotating shaft (16) and an eccentric block (17). The rotating shaft (16) passes through the screening channel (10). The rotating shaft (16) is connected to the vibration motor (15). The eccentric blocks (17) are arranged at both ends of the rotating shaft (16).

7. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 3 is characterized in that: The grading conveying device (2) comprises side baffles (18), and the side baffles (18) are arranged on both sides of the endless conveyor belt (6) and are located on the upper surface of the endless conveyor belt (6).

8. The dry magnetic adsorption repair equipment for heavy metal contaminated soil mixture according to claim 1, characterized in that: The magnetic attraction device (3) further comprises a receiving bucket (19), and the receiving bucket (19) is located below the outlet end of the annular sorting belt (5).

Images