A device for treating contaminated foundation soil

Abstract

This application relates to a device for treating contaminated foundation soil, belonging to the technical field of soil remediation. The device comprises a leaching tower, the leaching tower being provided with a guide cylinder, the bottom of which is connected to the leaching tower inlet, a feed pipe being provided on one side of the guide cylinder, and a conveyor belt being mounted on the other side of the guide cylinder. Mounting blocks are fixedly mounted at intervals on the outer circumference of the conveyor belt, and the mounting blocks are provided with filter plates for filtering larger particle size debris. The filter plates located within the guide cylinder move from bottom to top. This application improves the screening effect of the soil, thereby enhancing the soil cleaning effect of the device.

Description

Technical Field

[0001] The present application relates to the field of soil remediation, and in particular to a device for treating contaminated foundation soil. Background Art

[0002] Many polluting enterprises formerly located in urban areas have left behind numerous contaminated sites after relocating from city centers. Surveys show that heavy metal pollution is widespread in land used by heavily polluting enterprises, industrial wastelands, industrial parks, and mining areas. Centralized solid waste treatment and disposal sites and oil production areas are subject to significant organic pollution. Combined pollution of inorganic and organic pollutants exists in sewage irrigation areas and along major highways.

[0003] There are many common remediation methods for contaminated soil, including soil cleaning, chemical treatment, bioremediation, and thermal combing. Soil cleaning is to send the contaminated soil to a leaching device and use spraying to bring the chemical solution into contact with the heavy metals or petroleum pollution components in the soil, thereby completing the soil purification.

[0004] In the related art, when performing soil leaching and remediation, the soil needs to be sent into the leaching device first. The soil often contains some debris with larger particle size. On the one hand, these debris can easily damage the stirring components inside the leaching device, and on the other hand, they can easily clog the filtering components inside the leaching device, thereby affecting the soil cleaning effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for treating contaminated foundation soil with a simple structure and reasonable design in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A device for treating contaminated foundation soil comprises a leaching tower, wherein a guide cylinder is provided on the leaching tower, the bottom of the guide cylinder is connected to the leaching tower inlet, a feed pipe is provided on one side of the guide cylinder, and a conveyor belt is installed on the other side of the guide cylinder. Mounting seats are fixedly installed at intervals on the outer peripheral surface of the conveyor belt, and a filter plate for filtering larger particle size slag is provided on the mounting seat. The filter plate located in the guide cylinder moves from bottom to top.

[0008] By adopting the above technical solution, the unpurified soil enters the guide cylinder through the feed pipe, the conveyor belt drives the mounting seat to move, and the movement of the mounting seat drives the filter plate to move. The filter plate filters the soil in the guide cylinder, so that the larger particle size slag moves out of the guide cylinder along with the filter plate, and the fine soil enters the leaching tower along the guide cylinder, which is beneficial to improve the screening effect of the device on the soil, and thus improve the cleaning effect of the device on the soil.

[0009] Preferably, the mounting seat is provided with a mounting groove for plugging with the filter plate, and the mounting seat is provided with a positioning bolt for passing through the filter plate, the positioning bolt is slidingly engaged with the filter plate, the positioning bolt is threadedly engaged with the mounting seat, and positioning springs are provided on both side surfaces of the filter plate located in the mounting groove, and the positioning springs are sleeved on the positioning bolts.

[0010] By adopting the above technical solution, the setting of the mounting groove and the positioning bolt makes it convenient for the operator to install the filter plate on the mounting seat. The setting of the positioning spring enables the filter plate to vibrate within a certain range. When the soil in the feed pipe impacts the filter plate, the filter plate vibrates, causing the soil to diffuse. On the one hand, this increases the contact area between the soil and the filter plate, and on the other hand, it helps to avoid clogging of the filter plate.

[0011] Preferably, a receiving groove is provided on the inner side wall of the guide cylinder away from the conveyor belt, a rotating rod is rotatable on the inner side wall of the receiving groove, a baffle for abutting the filter plate is fixedly connected to the rotating rod, a torsion spring is sleeved on the rotating rod, one end of the torsion spring is fixedly connected to the rotating rod, and the other end of the torsion spring is fixedly connected to the inner side wall of the receiving groove.

[0012] By adopting the above technical solution, the setting of the baffle is conducive to flattening part of the soil above the filter plate so that the soil can be in uniform contact with the filter plate. On the other hand, the cooperation between the baffle and the positioning spring can make the filter plate vibrate again, further improving the filtering effect of the soil. The cooperation between the rotating rod and the torsion spring is conducive to resetting the baffle.

[0013] Preferably, a blower is installed on one side of the top of the guide cylinder, and a collection assembly is installed on the other side of the top of the guide cylinder. The collection assembly includes a first collection tube fixedly connected to the guide cylinder for collecting slag and stone, and a second collection tube fixedly connected to the first collection tube, and the bottom of the second collection tube is connected to the feed pipe.

[0014] By adopting the above technical solution, when the filter plate moves the mixture of slag and soil to the top of the guide cylinder, the blower causes the slag and soil to move. Due to the different weights of the two, the slag moves to the first collection tube close to the guide cylinder, and the soil moves to the second collection tube, and finally enters the feed pipe again.

[0015] Preferably, the elution tower includes a first tower body and a second tower body fixedly connected to the first tower body, a stirring cavity for communicating with the guide cylinder is opened in the second tower body, a spray pipe for conveying the purification liquid is installed on the inner wall of the stirring cavity, and nozzles are installed at intervals on the spray pipe, and the nozzles are arranged in an staggered direction.

[0016] By adopting the above technical solution, the purified liquid enters the stirring cavity of the first tower body through the spray pipe and is sprayed out through the nozzle. A part of the purified liquid impacts the soil and the filter plate upward, which on the one hand improves the contact effect between the soil and the purified liquid and on the other hand prevents the filter plate from being blocked. The other part of the purified liquid impacts the stirring cavity downward to ensure the mixing effect of the purified liquid and the soil.

[0017] Preferably, a first motor is installed in the first tower body, a driving rod is fixedly connected to the output shaft of the first motor, the top of the driving rod extends into the stirring cavity, and stirring rods are installed at intervals on the driving rod located in the stirring cavity, and both ends of the stirring rod are fixedly connected with scrapers for slidingly cooperating with the inner wall of the stirring cavity.

[0018] By adopting the above technical solution, the output shaft of the first motor drives the driving rod to rotate, and the driving rod drives the stirring rod and the scraper to rotate. The rotation of the stirring rod is conducive to improving the mixing effect of the soil and the purification liquid, and the setting of the scraper is conducive to preventing wet soil from adhering to the inner wall of the stirring cavity.

[0019] Preferably, a filter cavity for communicating with the stirring cavity is provided in the first tower body, a filter screen is installed on the inner bottom surface of the filter cavity, the filter screen is arranged around the drive rod, and a receiving plate is installed at intervals on the drive rod located in the filter cavity, the outer peripheral surface of the receiving plate is slidably engaged with the inner side wall of the filter screen, and a connecting hole is provided on the receiving plate, and a discharge pipe for discharging fine soil is installed on the inner bottom surface of the filter cavity.

[0020] By adopting the above technical solution, the moist soil in the stirring cavity falls onto the receiving plate in the filter cavity. The driving rod rotates to drive the receiving plate to rotate. The moisture in the moist soil passes through the filter mesh due to centrifugal force, and the dry soil falls in sequence along the connecting holes. The setting of multiple layers of receiving plates is conducive to ensuring that soil is filtered at different heights.

[0021] Preferably, there are two receiving plates at the same height of the driving rod, the two receiving plates are arranged in an alternating manner, and the receiving plates are both rotatably cooperated with the driving rod, and a dovetail block is slidably installed on the bottom of the receiving plate, a moving rod is hinged on the dovetail block, a fixed sleeve is sleeved on the moving rod, the fixed sleeve is hinged to the driving rod, a return spring is arranged in the fixed sleeve, one end of the return spring is fixedly connected to the moving rod, and the other end of the return spring is fixedly connected to the fixed sleeve.

[0022] By adopting the above technical solution, when there is a lot of soil on a single receiving plate, the gravity of the soil causes the receiving plate to deflect away from the side of the driving rod. At this time, the dovetail block drives the moving rod to move, and the reset spring is in a compressed state, so that the soil on the receiving plate can fall quickly through the gap. The setting of the reset spring facilitates the reset of the receiving plate, and the receiving plate vibrates, which further accelerates the efficiency of soil falling.

[0023] Preferably, a drain pipe for discharging waste water is installed on the inner bottom surface of the filter cavity, a movable ring is provided on the inner side wall of the filter cavity, a plurality of leakage holes are opened on the movable ring, the outer peripheral surface of the movable ring is slidingly matched with the inner side wall of the filter cavity, the inner peripheral surface of the movable ring is slidingly matched with the filter screen, a second motor is installed on the top of the first tower body, a reciprocating screw is fixedly connected to the output shaft of the second motor, the reciprocating screw passes through the movable ring and rotates with the inner bottom surface of the filter cavity, and the reciprocating screw is threadedly matched with the movable ring.

[0024] By adopting the above technical solution, the second motor is started, the output shaft of the second motor drives the reciprocating screw to move, and the reciprocating screw drives the moving ring to move back and forth along the height direction of the reciprocating screw. The setting of the moving ring is conducive to cleaning the inner wall of the filter cavity and the filter screen, and the wastewater moves out of the filter cavity through the drain pipe.

[0025] Preferably, a first partition is fixedly installed at the bottom of the stirring cavity, and first through holes are spaced apart on the first partition. A second partition is rotatably installed at the bottom of the first partition, and second through holes for cooperating with the first through holes are spaced apart on the second partition. A gear ring is fixedly connected to the outer peripheral surface of the second partition, and a connecting gear is installed on the output shaft of the second motor, and the connecting gear is meshed with the gear ring.

[0026] By adopting the above technical solution, the output shaft of the second motor rotates to drive the connecting gear to rotate, the connecting gear drives the ring gear to rotate, and the rotation of the ring gear drives the second partition to rotate. When the second through hole on the second partition is connected to the first through hole on the first partition, the moist soil in the stirring cavity falls, and the cooperation between the first partition and the second partition is conducive to adjusting the falling rate of the soil.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Unpurified soil enters the guide cylinder through the feed pipe. The conveyor belt drives the mounting seat to move. The movement of the mounting seat drives the filter plate to move. The filter plate filters the soil in the guide cylinder, so that the larger particles of slag and stone move out of the guide cylinder along with the filter plate, and the fine soil enters the leaching tower along the guide cylinder, which is beneficial to improve the device's screening effect on the soil, and thus improve the device's soil cleaning effect;

[0029] 2. The installation slot and positioning bolts make it easy for operators to install the filter plate on the mounting base. The positioning spring allows the filter plate to vibrate within a certain range. When the soil in the feed pipe hits the filter plate, the filter plate vibrates, causing the soil to spread. This not only increases the contact area between the soil and the filter plate, but also helps prevent clogging of the filter plate.

[0030] 3. The moist soil in the stirring cavity falls onto the receiving plate in the filter cavity. The driving rod rotates to drive the receiving plate to rotate. The moisture in the moist soil passes through the filter due to centrifugal force, and the dry soil falls along the connecting holes in turn. The setting of multiple layers of receiving plates is conducive to ensuring that soil is filtered at different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a device for treating contaminated foundation soil according to an embodiment of the present application.

[0032] Figure 2 It is a structural schematic diagram of the guide cylinder of an embodiment of the present application.

[0033] Figure 3 It is a schematic diagram of the internal structure of the guide cylinder of an embodiment of the present application.

[0034] Figure 4 It is a schematic diagram of the internal structure of the elution tower of an embodiment of the present application.

[0035] Figure 5 It is a schematic diagram of the internal structure of the docking plate of an embodiment of the present application.

[0036] Explanation of the accompanying symbols: 1. elution tower; 11. first tower body; 12. second tower body; 13. stirring cavity; 14. spray pipe; 141. nozzle; 15. first motor; 16. driving rod; 17. stirring rod; 18. scraper; 2. guide cylinder; 21. feeding pipe; 22. driving roller; 23. driven roller; 24. driving motor; 25. conveyor belt; 26. receiving tank; 27. rotating rod; 28. baffle; 29. ​​torsion spring; 3. mounting seat; 31. filter plate; 32. mounting groove; 33. positioning bolt; 34. positioning spring ;4. Collection component;41. First collection tube;42. Second collection tube;43. Hair dryer;51. First partition;52. First through hole;53. Second partition;54. Second through hole;55. Ring gear;56. Second motor;57. Connecting gear;6. Filter cavity;61. Filter screen;63. Discharge pipe;64. Receiving plate;641. Connecting hole;65. Dovetail block;66. Moving rod;67. Fixed sleeve;68. Reset spring;7. Moving ring;71. Leakage hole;72. Reciprocating screw;73. Drain pipe. DETAILED DESCRIPTION

[0037] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Reference Figure 1 The device for treating contaminated foundation soil includes a leaching tower 1 and a guide tube 2.

[0039] Reference Figure 2 、 Figure 3 The guide cylinder 2 is in the shape of a square cylinder and is arranged vertically. A feed pipe 21 is provided on one side of the guide cylinder 2. The feed pipe 21 is in the shape of a directional cylinder and is arranged at an angle. The feed pipe 21 is connected to the guide cylinder 2. A driving roller 22 is rotatably mounted on the top of the guide cylinder 2 on the side away from the feed pipe 21. A clearance opening is provided at the bottom of the guide cylinder 2 on the side away from the feed pipe 21, and a driven roller 23 is rotatably mounted on the inner side wall of the clearance opening. A drive motor 24 is installed on the guide cylinder 2. The output shaft of the drive motor 24 is fixedly connected to the driving roller 22, and a conveyor belt 25 is wound between the driving roller 22 and the driven roller 23.

[0040] Reference Figure 3 A mounting seat 3 is fixedly mounted on the outer circumference of the conveyor belt 25. The mounting seat 3 is in the shape of a rectangular parallelepiped and arranged horizontally. The length of the mounting seat 3 is the same as the width of the conveyor belt 25. Three mounting seats 3 are provided, and the three mounting seats 3 are spaced apart. Each mounting seat 3 is provided with a filter plate 31. The filter plate 31 is a porous rectangular plate and is used to filter larger particles of slag. The side of the mounting seat 3 facing away from the conveyor belt 25 is provided with a mounting groove 32 for plugging with the filter plate 31.

[0041] Reference Figure 3 Two locating bolts 33 are provided on the mounting base 3. These two locating bolts 33 are spaced apart and threadedly engage with the inner bottom surface of the mounting slot 32. The locating bolts 33 penetrate the filter plate 31 and slideably engage with the filter plate 31. Two locating springs 34 are sleeved on the locating bolts 33 located in the mounting slot 32. The two locating springs 34 are respectively provided on either side of the filter plate 31. One side of the locating spring 34 abuts against the filter plate 31, and the other side abuts against the mounting base 3.

[0042] The drive motor 24 rotates the active roller 22, which cooperates with the driven roller 23 to move the conveyor belt 25. The conveyor belt 25 then drives the mounting base 3 to move, thereby moving the filter plate 31 located within the guide cylinder 2 from bottom to top. The installation slots 32 and positioning bolts 33 facilitate the operator's installation of the filter plate 31 on the mounting base 3. The positioning springs 34 allow the filter plate 31 to vibrate within a certain range. When soil in the feed pipe 21 impacts the filter plate 31, the filter plate 31 vibrates, causing the soil to disperse. This not only increases the contact area between the soil and the filter plate 31, but also helps prevent clogging of the filter plate 31.

[0043] Reference Figure 3 A receiving slot 26 is defined at the upper end of the inner sidewall of the guide cylinder 2, away from the conveyor belt 25. The opening of the receiving slot 26 is rectangular, and its length aligns with the length of the guide cylinder 2. A rotating rod 27 is pivoted on the inner sidewall of the receiving slot 26. A baffle 28 is fixedly connected to the rotating rod 27, which is used to abut the filter plate 31. A torsion spring 29 is sleeved on the movable rod. One end of the torsion spring 29 is fixedly connected to the rotating rod 27, and the other end of the torsion spring 29 is fixedly connected to the inner sidewall of the receiving slot 26. When the filter plate 31 contacts the baffle 28, the baffle 28 first causes the filter plate 31 to move downward within the mounting slot 32. When the filter plate 31 is released from contact with the baffle 28, a positioning spring 34 resets the filter plate 31. The baffle 28 and positioning spring 34 cooperate to cause the filter plate 31 to vibrate again, further improving the soil filtration effect.

[0044] Reference Figure 2 、 Figure 3 A blower 43 is mounted on one side of the top of the guide cylinder 2, and a collection assembly 4 is mounted on the side of the top of the guide cylinder 2 away from the blower 43. The collection assembly 4 includes a first collection tube 41 and a second collection tube 42. The heights of the first and second collection tubes 41, 42 are both flush with the height of the active roller 22. The first collection tube 41 is fixedly connected to the outer circumference of the guide cylinder 2 and is used to collect the debris filtered by the filter plate 31. The second collection tube 42 is fixedly connected to the side of the first collection tube 41 away from the guide cylinder 2 and is used to collect the fine soil between the debris. The bottom of the second collection tube 42 is connected to the feed pipe 21.

[0045] When the filter plate 31 moves the mixture of slag and soil to the top of the guide cylinder 2, the blower 43 moves the slag and soil. Due to the different weights of the two, the slag moves to the first collection tube 41 close to the guide cylinder 2, and the soil moves to the second collection tube 42, and finally enters the feed pipe 21 again.

[0046] Reference Figure 1 、 Figure 4The elution tower 1 includes a first tower body 11 and a second tower body 12 fixedly connected to the first tower body 11. The first tower body 11 and the second tower body 12 are both cylindrical. A stirring cavity 13 for communicating with the bottom of the guide cylinder 2 is provided in the second tower body 12. The cross section of the stirring cavity 13 is circular. A spray pipe 14 for conveying the purified liquid is installed at the upper end of the second tower body 12. The spray pipe 14 extends into the stirring cavity 13. A plurality of nozzles 141 are installed on the spray pipe 14 located in the stirring cavity 13. The plurality of nozzles 141 are arranged at intervals, and the nozzles 141 are arranged in a staggered manner.

[0047] Reference Figure 4 The purified liquid enters the stirring cavity 13 of the first tower body 11 through the spray pipe 14 and is sprayed out through the nozzle 141. A part of the purified liquid impacts the soil and the filter plate 31 upward, which on the one hand improves the contact effect between the soil and the purified liquid and on the other hand prevents the filter plate 31 from being blocked. The other part of the purified liquid impacts the stirring cavity 13 downward to ensure the mixing effect of the purified liquid and the soil.

[0048] Reference Figure 4 A first motor 15 is installed at the bottom of the first tower body 11. The axis of the output shaft of the first motor 15 coincides with the axis of the first tower body 11, and a drive rod 16 is fixedly connected to the output shaft of the first motor 15. The axis of the drive rod 16 coincides with the axis of the output shaft of the first motor 15. The top of the drive rod 16 extends into the stirring cavity 13. Three stirring rods 17 are installed on the drive rod 16 located in the stirring cavity 13. The three stirring rods 17 are arranged at intervals along the length direction of the drive rod 16. Scrapers 18 are fixedly connected to both ends of the stirring rod 17. The side of the scraper 18 away from the stirring rod 17 slides with the inner wall of the stirring cavity 13. The output shaft of the first motor 15 drives the drive rod 16 to rotate, and the drive rod 16 drives the stirring rod 17 and the scraper 18 to rotate. The rotation of the stirring rod 17 is conducive to improving the mixing effect of the soil and the purification liquid. The setting of the scraper 18 is conducive to preventing wet soil from adhering to the inner wall of the stirring cavity 13.

[0049] Reference Figure 4A first partition plate 51 is fixedly installed at the bottom of the stirring cavity 13, and the driving rod 16 passes through the first partition plate 51 and slides with the first partition plate 51. Two first through holes 52 are provided on the first partition plate 51, and the two first through holes 52 are arranged at intervals. A second partition plate 53 is rotatably installed at the bottom of the first partition plate 51, and the driving rod 16 passes through the second partition plate 53 and slides with the second partition plate 53. Two second through holes 54 are provided on the second partition plate 53, and the two second through holes 54 correspond to the two first through holes 52. A gear ring 55 is sleeved on the outer peripheral surface of the second partition plate 53, and the gear ring 55 is fixedly connected to the second partition plate 53. A second motor 56 is installed on the top of the first tower body 11, and a connecting gear 57 is fixedly sleeved on the output shaft of the second motor 56, and the connecting gear 57 is meshed with the gear ring 55.

[0050] The output shaft of the second motor 56 rotates to drive the connecting gear 57 to rotate, the connecting gear 57 drives the ring gear 55 to rotate, and the rotation of the ring gear 55 drives the second partition 53 to rotate. When the second through hole 54 on the second partition 53 is connected with the first through hole 52 on the first partition 51, the moist soil in the stirring cavity 13 falls, and the cooperation between the first partition 51 and the second partition 53 is conducive to adjusting the falling rate of the soil.

[0051] Reference Figure 4 A filter cavity 6 is defined within the first tower body 11 and communicates with the stirring cavity 13. The cross-section of the filter cavity 6 is circular. A filter screen 61 is mounted on the inner bottom surface of the filter cavity 6. The top of the filter screen 61 is fixedly connected to the inner top surface of the filter cavity 6. The filter screen 61 surrounds the drive rod 16, with the axis of the filter screen 61 coinciding with the axis of the drive rod 16. A discharge pipe 63 for discharging fine soil is mounted on the inner bottom surface of the filter cavity 6.

[0052] Reference Figure 4 、 Figure 5 The driving rod 16 located in the filter cavity 6 is installed with receiving plates 64 at intervals along its length. The outer peripheral surface of the receiving plate 64 slides with the inner wall of the filter screen 61, and a plurality of connecting holes 641 are provided on the receiving plate 64. Two receiving plates 64 are provided at the same height of the driving rod 16. The two receiving plates 64 are staggered and both receiving plates 64 rotate with the driving rod 16. A dovetail block 65 is slidably installed at the bottom of the receiving plate 64. A moving rod 66 is hinged at the bottom of the dovetail block 65. A fixed sleeve 67 is slidably sleeved on the moving rod 66. The end of the fixed sleeve 67 away from the moving rod 66 is hinged to the driving rod 16. A return spring 68 is provided in the fixed sleeve 67. One end of the return spring 68 is fixedly connected to the moving rod 66, and the other end of the return spring 68 is fixedly connected to the inner bottom surface of the fixed sleeve 67.

[0053] The moist soil in the mixing cavity 13 falls onto the receiving plate 64 in the filter cavity 6. The rotation of the drive rod 16 drives the receiving plate 64, causing the moisture in the moist soil to pass through the filter screen 61 due to centrifugal force, while the dry soil falls sequentially through the connecting holes 641. When a large amount of soil is placed on a single receiving plate 64, the soil's gravity causes the receiving plate 64 to deflect away from the driving rod 16. At this time, the dovetail block 65 drives the moving rod 66 to move, and the return spring 68 is compressed, allowing the soil on the receiving plate 64 to quickly fall through the gap. The reset spring 68 facilitates the reset of the receiving plate 64, causing the receiving plate 64 to vibrate, further accelerating the efficiency of the soil's fall. The multi-layer receiving plate 64 configuration helps ensure that soil is filtered at different heights.

[0054] Reference Figure 4 A movable ring 7 is provided on the inner wall of the filter cavity 6, and a plurality of water leakage holes 71 are opened on the movable ring 7. The outer circumference of the movable ring 7 slides with the inner wall of the filter cavity 6, and the inner circumference of the movable ring 7 slides with the filter screen 61. A reciprocating screw 72 is rotatably installed on the inner bottom surface of the filter cavity 6. The reciprocating screw 72 is arranged vertically, and the top of the reciprocating screw 72 extends out of the first tower body 11 and is fixedly connected to the output shaft of the second motor 56. The reciprocating screw 72 passes through the movable ring 7, and the reciprocating screw 72 is threadedly engaged with the movable ring 7. A drain pipe 73 for discharging waste water is installed on the inner bottom surface of the filter cavity 6.

[0055] Reference Figure 4 The second motor 56 is started, and the output shaft of the second motor 56 drives the reciprocating screw 72 to move. The reciprocating screw 72 drives the moving ring 7 to move back and forth along the height direction of the reciprocating screw 72. The setting of the moving ring 7 is conducive to cleaning the inner wall of the filter cavity 6 and the filter screen 61, and the wastewater moves out of the filter cavity 6 through the drain pipe 73.

[0056] The implementation principle of a device for treating contaminated foundation soil in an embodiment of the present application is as follows: unpurified soil enters the guide cylinder 2 through the feed pipe 21, the conveyor belt 25 drives the mounting seat 3 to move, and the movement of the mounting seat 3 drives the filter plate 31 to move, and the filter plate 31 filters the soil in the guide cylinder 2, so that larger particle size debris moves out of the guide cylinder 2 along the filter plate 31, and fine soil enters the leaching tower 1 along the guide cylinder 2, which is beneficial to improving the screening effect of the device on the soil, and thus improving the cleaning effect of the device on the soil.

[0057] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A device for treating contaminated foundation soil, comprising a washing tower (1), characterized in that: The elution tower (1) is provided with a guide cylinder (2), the bottom of the guide cylinder (2) is connected to the inlet of the elution tower (1), a feed pipe (21) is provided on one side of the guide cylinder (2), a conveyor belt (25) is installed on the other side of the guide cylinder (2), and mounting seats (3) are fixedly installed on the outer peripheral surface of the conveyor belt (25) at intervals. The mounting seats (3) are provided with filter plates (31) for filtering larger particle size slag and stone. The filter plates (31) located in the guide cylinder (2) are arranged from bottom to top. The filter plate (31) is moved upward; the mounting seat (3) is provided with a mounting groove (32) for plugging and matching with the filter plate (31); the mounting seat (3) is provided with a positioning bolt (33) for penetrating the filter plate (31); the positioning bolt (33) is slidably matched with the filter plate (31); the positioning bolt (33) is threadedly matched with the mounting seat (3); and positioning springs (34) are provided on both sides of the filter plate (31) located in the mounting groove (32). A spring (34) is sleeved on the positioning bolt (33); a receiving groove (26) is provided on the inner side wall of the guide cylinder (2) away from the conveyor belt (25); a rotating rod (27) is rotated on the inner side wall of the receiving groove (26); a baffle (28) for contacting the filter plate (31) is fixedly connected to the rotating rod (27); a torsion spring (29) is sleeved on the rotating rod (27); one end of the torsion spring (29) is fixedly connected to the rotating rod (27); the torsion spring ( 29) The other end is fixedly connected to the inner wall of the accommodating groove (26); a blower (43) is installed on one side of the top of the guide cylinder (2), and a collecting assembly (4) is installed on the other side of the top of the guide cylinder (2), and the collecting assembly (4) includes a first collecting pipe (41) fixedly connected to the guide cylinder (2) for collecting slag and stone, and a second collecting pipe (42) fixedly connected to the first collecting pipe (41), and the bottom of the second collecting pipe (42) is connected to the feeding pipe (21).

2. The device for treating contaminated foundation soil according to claim 1, characterized in that: The elution tower (1) comprises a first tower body (11) and a second tower body (12) fixedly connected to the first tower body (11); a stirring cavity (13) for communicating with the guide cylinder (2) is provided in the second tower body (12); a spray pipe (14) for conveying a purified liquid is installed on the inner wall of the stirring cavity (13); nozzles (141) are installed at intervals on the spray pipe (14); and the nozzles (141) are arranged in a staggered manner.

3. The device for treating contaminated foundation soil according to claim 2, characterized in that: A first motor (15) is installed in the first tower body (11), a driving rod (16) is fixedly connected to the output shaft of the first motor (15), the top of the driving rod (16) extends into the stirring cavity (13), and a stirring rod (17) is installed on the driving rod (16) located in the stirring cavity (13) at intervals, and scrapers (18) are fixedly connected at both ends of the stirring rod (17) for slidingly cooperating with the inner wall of the stirring cavity (13).

4. The device for treating contaminated foundation soil according to claim 3, characterized in that: A filter cavity (6) for communicating with the stirring cavity (13) is provided in the first tower body (11); a filter screen (61) is installed on the inner bottom surface of the filter cavity (6); the filter screen (61) is arranged around the driving rod (16); and a receiving plate (64) is installed on the driving rod (16) in the filter cavity (6) at intervals; the outer peripheral surface of the receiving plate (64) is slidably engaged with the inner side wall of the filter screen (61), and a connecting hole (641) is provided on the receiving plate (64); and a discharge pipe (63) for discharging fine soil is installed on the inner bottom surface of the filter cavity (6).

5. The device for treating contaminated foundation soil according to claim 4, characterized in that: There are two receiving plates (64) at the same height of the driving rod (16), and the two receiving plates (64) are arranged in an alternating manner. The receiving plates (64) are both rotatably matched with the driving rod (16). A dovetail block (65) is slidably installed at the bottom of the receiving plate (64), and a moving rod (66) is hinged on the dovetail block (65). A fixed sleeve (67) is sleeved on the moving rod (66), and the fixed sleeve (67) is hinged to the driving rod (16). A reset spring (68) is arranged in the fixed sleeve (67), and one end of the reset spring (68) is fixedly connected to the moving rod (66), and the other end of the reset spring (68) is fixedly connected to the fixed sleeve (67).

6. The device for treating contaminated foundation soil according to claim 4, characterized in that: A drain pipe (73) for discharging wastewater is installed on the inner bottom surface of the filter cavity (6); a movable ring (7) is provided on the inner side wall of the filter cavity (6); a plurality of water leakage holes (71) are opened on the movable ring (7); the outer peripheral surface of the movable ring (7) is slidably engaged with the inner side wall of the filter cavity (6); the inner peripheral surface of the movable ring (7) is slidably engaged with the filter screen (61); a second motor (56) is installed on the top of the first tower body (11); a reciprocating screw (72) is fixedly connected to the output shaft of the second motor (56); the reciprocating screw (72) passes through the movable ring (7) and is rotatably engaged with the inner bottom surface of the filter cavity (6); the reciprocating screw (72) is threadedly engaged with the movable ring (7).

7. The device for treating contaminated foundation soil according to claim 6, characterized in that: A first partition (51) is fixedly installed at the bottom of the stirring cavity (13), and a first through hole (52) is spaced apart on the first partition (51). A second partition (53) is rotatably installed at the bottom of the first partition (51), and a second through hole (54) for matching with the first through hole (52) is spaced apart on the second partition (53). A gear ring (55) is fixedly connected to the outer peripheral surface of the second partition (53), and a connecting gear (57) is installed on the output shaft of the second motor (56), and the connecting gear (57) is meshed with the gear ring (55).

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