Screening and electrochemical repairing device for heavy metal contaminated soil

Abstract

The invention belongs to the field of heavy metal pollution prevention and control, and particularly relates to a heavy metal contaminated soil screening and electrochemical repairing device which comprises a screening frame, two plate grooves in front-back symmetry are formed in the screening frame, two sliding plates in front-back symmetry are vertically and slidably connected into the plate grooves, the aperture of the vibration frame on the uppermost side is large, the aperture of the vibration frame in the middle is small, and the vibration frame on the lowermost side is free of holes. By rotating a motor shaft, a cam can be driven to drive a sliding plate to vibrate up and down, namely, three vibration frames can be driven to vibrate, so that poured soil can be vibrated and divided into three kinds of soil including upper, middle and lower soil, group particle soil, middle particle soil and fine particle soil, and better chemical remediation is facilitated; the limiting plate is clamped with an inert anode bar, soil particles with different sizes are repaired by adjusting parameters such as voltage and current density of the electrochemical controller, and after the soil is mixed with an electrolyte in the repairing frame, metal particles are adsorbed on the stainless steel cathode plate for repairing.

Description

Technical Field

[0001] The invention relates to the field of heavy metal pollution prevention and control, and in particular to a screening and electrochemical repair device for heavy metal polluted soil. Background Art

[0002] Traditional methods for remediating heavy metal contaminated soil, such as chemical leaching, plant remediation, and solidification and stabilization, have problems such as low efficiency, high cost, and secondary pollution. Electrochemical remediation technology is more efficient and environmentally friendly, but it has high requirements on soil particle size when used alone. Therefore, a heavy metal contaminated soil screening and electrochemical remediation device is needed to replace the existing traditional heavy metal soil remediation methods, so as to improve the remediation efficiency and reduce costs. Summary of the invention

[0003] The object of the present invention is to provide a device for screening and electrochemical remediation of heavy metal contaminated soil to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screening and electrochemical remediation device for heavy metal contaminated soil, comprising a screening frame, the screening frame is provided with two front-to-back symmetrical plate slots, each of the plate slots is provided with a top plate fixedly connected to the screening frame at the top, the lower end surface of the top plate is fixedly connected with two left-right symmetrical limit rods located in the plate slots, two front-to-back symmetrical sliding plates are slidably connected in the plate slots, two springs coaxially aligned with the limit rods are fixedly connected between the upper end surface of the sliding plate and the lower end surface of the top plate, the screening frame is fixedly connected with two front-to-back symmetrical motor plates, and the space between the motor plates The machine shaft is rotatably connected, and the lower end surfaces of the sliding plates are fixedly connected with a connecting frame, and the machine shaft is fixedly connected with two cams located in the connecting frame, and three vibration frames equidistant from top to bottom are fixedly connected between the two sliding plates, and the inner end surface of each vibration frame is slightly inclined to the right, and the aperture of the uppermost vibration frame is larger, the middle one is smaller, and the lower one has no hole, so that by rotating the machine shaft, the sliding plate can be driven to vibrate up and down through the cam, and the three vibration frames can be driven to vibrate, so that the poured soil can be vibrated and screened into three types of soil, namely, upper, middle and lower, group particles, medium particles and fine particles, so as to facilitate better chemical remediation;

[0005] A bottom plate is provided on the lower side of the screening frame, and two symmetrical side plates are fixedly connected to the bottom plate, and three repair frames equidistant from top to bottom are fixedly connected between the side plates, and an electrochemical controller is fixedly connected to the right side of each repair frame, and the repair frame is fixedly connected to a limit frame and a limit plate, and the limit frame is clamped with a stainless steel cathode plate, and the limit plate is clamped with an inert anode rod, and the inert anode rod and the stainless steel cathode plate are connected to the electrochemical controller through connecting lines, so that by adjusting the voltage, current density and other parameters of the electrochemical controller, soil particles of different sizes can be repaired, and after the soil is mixed with the electrolyte in the repair frame, the metal particles are adsorbed on the stainless steel cathode plate for repair.

[0006] Preferably, the screening frame is provided with three discharge holes aligned with the left and right of the vibration frame, a feeding frame is fixedly connected between the right end face of the screening frame and the upper end face of each of the repair frames, and the screening frame is provided with two grooves, each of which is fixedly connected with an electric push rod, and the right sides of the two upper vibration frames are provided with a blocking frame located in the discharge hole, the electric push rod is power-connected to the blocking frame, and the electric push rod can drive the blocking frame to move up and down, so as to block the soil in the two upper vibration frames during screening, so as to prevent it from being discharged from the discharge holes in advance, and after the screening is completed, the blocking frame is moved up to discharge all the soil in the three vibration frames for repair;

[0007] Preferably, a motor is fixedly connected to the front end surface of the motor plate at the front side, the motor is dynamically connected to the machine shaft, and the motor can drive the machine shaft to rotate;

[0008] Preferably, the front end surface of each repair frame is fixedly connected to a liquid pump, the liquid pump is fixedly connected to a liquid inlet pipe located in the repair frame, and the liquid pump is fixedly connected to a connecting pipe, so that the electrolyte is connected through the connecting pipe, and the electrolyte can be automatically pumped into each repair frame for repair;

[0009] Preferably, the lower end surface of each repair frame is fixedly connected to a solenoid valve, the solenoid valve is communicated with the inside of the repair frame, and the lower end surface of the solenoid valve is fixedly connected to a drainage pipe, so that after the repair is completed, the solenoid valve is opened to allow the soil solution in each repair frame to fall and be discharged through the drainage pipe at the bottom;

[0010] Preferably, each of the limiting frames is provided with two card slots, and each of the stainless steel cathode plates is fixedly connected with two card blocks that are symmetrical on the left and right, and the stainless steel cathode plates are connected to the card slots through the card blocks for limiting, so that the stainless steel cathode plates can be quickly removed for cleaning;

[0011] Preferably, an intelligent controller is fixedly connected to the upper end surface of the bottom plate, and the intelligent controller controls the motor, the electric push rod, the liquid pump and the solenoid valve;

[0012] Preferably, the lower end surface of the screening frame and the upper end surface of the bottom plate are fixedly supported by two left-right symmetrical connecting lines.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention is provided with a vibration frame 101, a cam 119 and a sliding plate 122. The cam 119 is driven to rotate by a motor 115, and the sliding plate 122 can be driven to vibrate up and down in cooperation with a spring 123, so as to realize synchronous vibration of the three vibration frames 101. The two upper vibration frames 101 are both provided with holes for screening soil, and the aperture of the uppermost one is larger, so that coarse particles, medium particles and fine particles can be quickly distinguished. After the blocking frame 128 is moved up by the electric push rod 104, soils of different coarseness and fineness are transported to different repair frames 106 through the conveying frame 105, so as to realize quick soil screening and transportation.

[0015] The present invention is provided with a stainless steel cathode plate 108, a repair frame 106 and a solenoid valve 124, and the electrolyte is passed from the connecting pipe 133 to each repair frame 106 through the liquid inlet pipe 132 by the liquid pump 112. When soil with different particles is passed into the electrolyte, the voltage, current density and repair time parameters of the electrochemical controller 109 corresponding to the soil with different particles are adjusted, so that particles of heavy metals of different sizes in the soil are attached to the stainless steel cathode plate 108, so as to perform graded repair in a timely and fast manner. After the repair, the solenoid valve 124 is opened, so that the repaired soil mixture falls from top to bottom and is discharged through the drain pipe 125 for dehydration treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 for Figure 2 AA cross-sectional diagram of ;

[0019] Figure 4 for Figure 2 BB cross-sectional diagram;

[0020] Figure 5 for Figure 3 A partial enlarged schematic diagram of

[0021] Figure 6 for Figure 4A partial enlarged schematic diagram of

[0022] Figure 7 It is a three-dimensional schematic cross-sectional view of the screening frame of the present invention;

[0023] Figure 8 This is a three-dimensional schematic diagram of the disassembly of the repair frame of the present invention.

[0024] In the figure: 100, screening frame; 101, vibration frame; 102, plate slot; 103, groove; 104, electric push rod; 105, material feeding frame; 106, repair frame; 107, limit frame; 108, stainless steel cathode plate; 109, electrochemical controller; 110, limit plate; 111, inert anode rod; 112, liquid pump; 113, side plate; 114, motor plate; 115, motor; 1 16. Intelligent controller; 117. Bottom plate; 118. Connecting line; 119. Cam; 120. Top plate; 121. Limit rod; 122. Sliding plate; 123. Spring; 124. Solenoid valve; 125. Drain pipe; 126. Machine shaft; 127. Discharge hole; 128. Blocking rack; 129. Connecting rack; 130. Card slot; 131. Card block; 132. Liquid inlet pipe; 133. Connecting pipe. DETAILED DESCRIPTION

[0025] To facilitate a better understanding of the present invention, the following examples are provided to illustrate the present invention in conjunction with the accompanying drawings. These examples belong to the protection scope of the present invention, but do not limit the protection scope of the present invention.

[0026] Embodiment 1:

[0027] See also Figure 1-8The present invention provides a technical solution: a screening and electrochemical remediation device for heavy metal contaminated soil, comprising a screening frame 100, wherein the screening frame 100 is provided with two front-to-back symmetrical plate slots 102, each of the plate slots 102 is provided with a top plate 120 fixedly connected to the screening frame 100, the lower end surface of the top plate 120 is fixedly connected with two left-right symmetrical limiting rods 121 located in the plate slots 102, two front-to-back symmetrical sliding plates 122 are slidably connected in the plate slots 102, two springs 123 coaxially aligned with the limiting rods 121 are fixedly connected between the upper end surface of the sliding plate 122 and the lower end surface of the top plate 120, and the screening frame 100 is fixedly connected with two front-to-back symmetrical motor plates 114, and the motor plates 11 4 is rotatably connected with an organic shaft 126, the lower end faces of the sliding plates 122 are fixedly connected with a connecting frame 129, the machine shaft 126 is fixedly connected with two cams 119 located in the connecting frame 129, and three vibration frames 101 equidistant from top to bottom are fixedly connected between the two sliding plates 122, the inner end face of each vibration frame 101 is slightly inclined to the right, the aperture of the uppermost vibration frame 101 is larger, the middle one is smaller, and the lower one has no hole, so that by rotating the machine shaft 126, the sliding plate 122 can be driven to vibrate up and down through the cam 119, that is, the three vibration frames 101 can be driven to vibrate, so that the poured soil can be vibrated and screened into three types of soil, namely, upper, middle and lower, group particles, medium particles and fine particles, so as to facilitate better chemical remediation;

[0028] A motor 115 is fixedly connected to the front end surface of the motor plate 114 at the front side. The motor 115 is power-connected to the shaft 126 , and the motor 115 can drive the shaft 126 to rotate.

[0029] Embodiment 2:

[0030] See also Figure 1-8 , in order to adjust the parameters according to the different coarseness and fineness of the soil for electrochemical remediation and control heavy metal pollution, a remediation frame 106, a stainless steel cathode plate 108 and an inert anode rod 111 are set;

[0031] A bottom plate 117 is provided at the lower side of the screening frame 100, and the bottom plate 117 is fixedly connected with two symmetrical side plates 113, and three repair frames 106 are fixedly connected between the side plates 113, and an electrochemical controller 109 is fixedly connected to the right side of each repair frame 106. The repair frame 106 is fixedly connected with a limit frame 107 and a limit plate 110, and the limit frame 107 is clamped with a stainless steel cathode plate 108, and the limit plate 110 is clamped with an inert anode rod 111, and the inert anode rod 111 and the stainless steel cathode plate 108 are connected to the electrochemical controller 109 through a connecting line 118, so that the voltage, current density and other parameters of the electrochemical controller 109 are adjusted to repair soil particles of different sizes, and after the soil is mixed with the electrolyte in the repair frame 106, the metal particles are adsorbed on the stainless steel cathode plate 108 for repair;

[0032] The front end surface of each repair frame 106 is fixedly connected to a liquid pump 112, and the liquid pump 112 is fixedly connected to a liquid inlet pipe 132 located in the repair frame 106, and the liquid pump 112 is fixedly connected to a connecting pipe 133, so that the electrolyte is connected through the connecting pipe 133, and the electrolyte can be automatically pumped into each repair frame 106 for repair;

[0033] The lower end surface of each repair frame 106 is fixedly connected to a solenoid valve 124, and the solenoid valve 124 is communicated with the inside of the repair frame 106. The lower end surface of the solenoid valve 124 is fixedly connected to a drainage pipe 125, so that after the repair is completed, the solenoid valve 124 is opened to allow the soil solution in each repair frame 106 to fall and be discharged through the drainage pipe 125 at the bottom.

[0034] Embodiment 3:

[0035] See also Figure 1-8 In order to transfer soil of different particle sizes to the corresponding repair rack 106 for repair, a blocking rack 128 and a conveying rack 105 are provided;

[0036] The screening frame 100 is provided with three discharge holes 127 aligned with the left and right sides of the vibration frame 101, a feeding frame 105 is fixedly connected between the right end face of the screening frame 100 and the upper end face of each of the repair frames 106, and the screening frame 100 is provided with two grooves 103, each of which is fixedly connected with an electric push rod 104, and the right sides of the two upper vibration frames 101 are provided with a blocking frame 128 located in the discharge hole 127, the electric push rod 104 is power-connected to the blocking frame 128, and the electric push rod 104 can drive the blocking frame 128 to move up and down, so as to block the soil in the two upper vibration frames 101 during screening, and prevent it from being discharged from the discharge hole 127 in advance, and after the screening is completed, the blocking frame 128 is moved upward to discharge all the soil in the three vibration frames 101 for repair.

[0037] Embodiment 4:

[0038] See also Figure 1-8 In order to conveniently remove the stainless steel cathode plate 108 that adsorbs heavy metal soil for cleaning, a card slot 130 and a card block 131 are provided;

[0039] Each of the limiting frames 107 is provided with two card slots 130, and each of the stainless steel cathode plates 108 is fixedly connected with two card blocks 131 that are symmetrical on the left and right. The stainless steel cathode plates 108 are clamped into the card slots 130 by the card blocks 131 for limiting, so that the stainless steel cathode plates 108 can be quickly removed for cleaning;

[0040] The upper end surface of the bottom plate 117 is fixedly connected to an intelligent controller 116, and the intelligent controller 116 controls the motor 115, the electric push rod 104, the liquid pump 112 and the solenoid valve 124;

[0041] The lower end surface of the screening frame 100 and the upper end surface of the bottom plate 117 are fixedly supported by two left-right symmetrical connecting lines 118 .

[0042] Working principle:

[0043] First, a certain amount of soil contaminated by heavy metals is poured into the screening frame 100, and the motor 115 is started by the intelligent controller 116. The motor 115 drives the machine shaft 126 to rotate, and the machine shaft 126 drives the cam 119 to rotate rapidly. The rotation of the cam 119 cooperates with the expansion and contraction of the spring 123 to drive the sliding plate 122 to move up and down in a circular manner. The sliding plate 122 drives the three vibration frames 101 to vibrate synchronously. The uppermost vibration frame 101 screens out the coarse particles of soil, and the rest of the soil falls to the middle vibration frame 101. The middle vibration frame 101 screens out the medium particles of soil, and finally the fine particles of soil fall to the lowermost vibration frame 101. After sufficient screening, the two electric push rods 104 are started by the intelligent controller 116. The electric push rods 104 drive the blocking frame 128 to move up. The soil on each vibration frame 101 slowly slides from the discharge hole 127 to the feeding frame 105 under continued vibration, and falls into the corresponding repair frame 106.

[0044] The connecting pipe 133 is connected to the electrolyte, and the pumping pump 112 is started in advance to pump an appropriate amount of electrolyte into the repair frame 106 through the connecting pipe 133 and the liquid inlet pipe 132, and the output parameters of the electrochemical controller 109 are adjusted according to the corresponding soil particle size, including parameters such as voltage and current density. As the soil slowly slides into the repair frame 106, the heavy metal particles in the soil move toward the stainless steel cathode plate 108 in the electrolyte and are adsorbed onto the stainless steel cathode plate 108, so as to perform full Huaxuan repair;

[0045] After the repair is completed, the solenoid valve 124 is opened first, and the soil solution in the repair frame 106 is discharged from the drain pipe 125, and is completely discharged through the lowermost drain pipe 125, and is dehydrated. Then, each stainless steel cathode plate 108 is removed from the limiting frame 107, and the heavy metal soil particles on the stainless steel cathode plate 108 are cleaned to achieve cyclic repair and use, improve repair efficiency, and reduce costs.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy metal contaminated soil screening and electrochemical remediation device, comprising a screening frame (100), characterized in that: The screening frame (100) is provided with two plate slots (102) symmetrical in front and back, and a top plate (120) fixedly connected to the screening frame (100) is provided on the top of each plate slot (102), and two left-right symmetrical limiting rods (121) located in the plate slot (102) are fixedly connected to the lower end surface of the top plate (120), and two sliding plates (122) symmetrical in front and back are slidably connected in the plate slot (102) up and down, and two springs (123) coaxially aligned with the limiting rods (121) are fixedly connected between the upper end surface of the sliding plate (122) and the lower end surface of the top plate (120), and the The screening frame (100) is fixedly connected with two motor plates (114) symmetrically arranged front and back, and a machine shaft (126) is rotatably connected between the motor plates (114). The lower end surfaces of the sliding plates (122) are fixedly connected with a connecting frame (129), and the machine shaft (126) is fixedly connected with two cams (119) located in the connecting frame (129). Three vibration frames (101) equidistant from top to bottom are fixedly connected between the two sliding plates (122), and the inner end surface of each vibration frame (101) is slightly inclined to the right, the uppermost vibration frame (101) has a larger aperture, the middle one has a smaller aperture, and the lowermost one has no aperture; A bottom plate (117) is provided at the lower side of the screening frame (100), and the bottom plate (117) is fixedly connected to two side plates (113) that are symmetrical in front and back, and three repair frames (106) that are equidistant from top to bottom are fixedly connected between the side plates (113), and an electrochemical controller (109) is fixedly connected to the right side of each repair frame (106), and the repair frame (106) is fixedly connected to a limiting frame (107) and a limiting plate (110), and the limiting frame (107) is clamped with a stainless steel cathode plate (108), and the limiting plate (110) is clamped with an inert anode rod (111), and the inert anode rod (111) and the stainless steel cathode plate (108) are connected to the electrochemical controller (109) via a connecting line (118).

2. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 1, characterized in that: The screening frame (100) is provided with three discharge holes (127) aligned with the vibration frame (101) on the left and right. A feeding frame (105) is fixedly connected between the right end surface of the screening frame (100) and the upper end surface of each repair frame (106). The screening frame (100) is provided with two grooves (103). An electric push rod (104) is fixedly connected in each groove (103). A blocking frame (128) located in the discharge hole (127) is provided on the right side of the two upper vibration frames (101). The electric push rod (104) is connected to the blocking frame (128) by power, and the electric push rod (104) can drive the blocking frame (128) to move up and down.

3. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 2, characterized in that: A motor (115) is fixedly connected to the front end surface of the motor plate (114) at the front side. The motor (115) is in power connection with the machine shaft (126). The motor (115) can drive the machine shaft (126) to rotate.

4. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 5, characterized in that: The front end surface of each repair frame (106) is fixedly connected to a liquid pump (112), the liquid pump (112) is fixedly connected to a liquid inlet pipe (132) located in the repair frame (106), and the liquid pump (112) is fixedly connected to a connecting pipe (133).

5. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 4, characterized in that: The lower end surface of each repair frame (106) is fixedly connected to a solenoid valve (124), the solenoid valve (124) is communicated with the inside of the repair frame (106), and the lower end surface of the solenoid valve (124) is fixedly connected to a liquid discharge pipe (125).

6. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 5, characterized in that: Each of the limiting frames (107) is provided with two clamping slots (130), and each of the stainless steel cathode plates (108) is fixedly connected with two clamping blocks (131) that are symmetrical on the left and right. The stainless steel cathode plates (108) are clamped into the clamping slots (130) through the clamping blocks (131) for limiting.

7. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 6, characterized in that: An intelligent controller (116) is fixedly connected to the upper end surface of the bottom plate (117), and the intelligent controller (116) controls the motor (115), the electric push rod (104), the liquid pump (112) and the solenoid valve (124).

8. The device for screening and electrochemical remediation of heavy metal contaminated soil according to claim 7, characterized in that: The lower end surface of the screening frame (100) and the upper end surface of the bottom plate (117) are fixedly supported by two left-right symmetrical connecting lines (118).

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