A heavy metal contaminated soil remediation equipment

Abstract

The present invention belongs to the field of soil remediation, and in particular, relates to a heavy metal contaminated soil remediation device, a heavy metal contaminated soil remediation device, comprising a bottom plate, a collecting bucket fixedly arranged above the bottom plate, two soil feeding bins fixedly arranged at one end of the collecting bucket away from the bottom plate, crushing rollers rotatably arranged inside the two soil feeding bins, a screen is arranged on the side of each group of crushing rollers close to the bottom plate, a mixing disk is fixedly arranged below the screen, a plurality of soil leakage holes are opened on the surface of the mixing disk, a rotating rod is rotatably arranged at the inner center position of the collecting bucket, and a plurality of stirring rods are fixedly arranged at one end of the rotating rod that penetrates into the inner part of the collecting bucket. Specific powder can be used to repair cultivated soil contaminated by heavy metals, so that the heavy metal content inside the soil is reduced to meet the needs of cultivated land.

Description

Technical Field

[0001] The invention belongs to the field of soil remediation, and in particular relates to a heavy metal polluted soil remediation device. Background Art

[0002] At present, most heavy metal soil remediation technologies focus on treating large areas of soil, but the remediation effect is not obvious enough, and the treatment time is long, which cannot be applied on a large scale. The topsoil contains more heavy metals in cultivated soil, while the deeper soil layers have lower heavy metal contents. Most soil remediation equipment collects the contaminated soil first and then remediates it, which not only wastes the soil remediation drugs, but also has insignificant remediation effects. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a heavy metal contaminated soil remediation device. This heavy metal contaminated soil remediation device can use specific medicinal powder to remediate cultivated land soil contaminated by heavy metals, thereby reducing the heavy metal content in the soil to meet the needs of cultivated land.

[0004] The objective of the present invention can be achieved through the following technical scheme: a heavy metal contaminated soil remediation equipment, comprising a base plate, a collecting bucket is fixedly arranged above the base plate, two soil feeding bins are fixedly arranged at one end of the collecting bucket away from the base plate, two groups of crushing rollers that can crush soil blocks are rotatably arranged inside the two soil feeding bins, each group of crushing rollers is provided with a screen that can screen out large stones near the base plate, a mixing disk is fixedly arranged below the screen, a plurality of soil leakage holes are opened on the surface of the mixing disk, a rotating rod is rotatably arranged at the inner center position of the collecting bucket, one end of the rotating rod extends out of the collecting bucket, a plurality of stirring rods are fixedly arranged at the end of the rotating rod extending into the collecting bucket, the stirring rods are evenly distributed along the circumferential surface of the rotating rod, a baffle is fixedly arranged at the end of the rotating rod that is deep out of the collecting bucket, a plurality of first hydraulic telescopic columns are fixedly arranged on the side of the baffle close to the collecting bucket, and a first hydraulic pump is fixedly arranged at the end of each first hydraulic telescopic column away from the baffle.

[0005] Preferably, each of the crushing rollers has one end extending out of the soil entry bin, and each end of the crushing roller extending out of the soil entry bin is fixedly provided with a driven gear, and each group of driven gears meshes with each other for transmission, and each soil entry bin is fixedly provided with a first drive motor on the side away from the baffle, and each output end of the first drive motor is fixedly provided with a driving gear, and the driving gear and an adjacent driven gear mesh with each other for transmission; one end of the rotating rod extends out of the interior of the collection barrel, and a second drive motor is fixedly provided on the side of the baffle away from the collection barrel, and the output end of the second drive motor is fixedly connected to the end of the rotating rod extending out of the collection barrel. Crushing large soil blocks into small soil blocks can speed up the remediation of soil contaminated by powder.

[0006] Preferably, a plurality of protrusions are evenly distributed on the outer circumferential surface of each crushing roller, a sliding cavity is opened inside each of the protrusions, a first sliding block is slidably arranged inside each of the sliding cavity, a push rod is fixedly arranged at one end of each of the first sliding blocks away from the crushing roller, a flexible ring is arranged at one end of each of the push rods away from the crushing roller, and a first spring is connected between the side of the first sliding block close to the crushing roller and the protrusion.

[0007] Preferably, a plurality of chutes are provided on both sides of each soil inlet bin, and connecting rods are fixedly provided on both sides of each screen, and each connecting rod extends out of the soil inlet bin through the chutes, and a rack is fixedly provided on the side of the connecting rod close to the crushing roller, and a third drive motor is fixedly provided above the chutes on each side, and a half gear is fixedly provided on the output end of each third drive motor, and the half gear and the rack are intermittently meshed and driven. Prevent large stones from entering the collection barrel and affecting the stability of the internal components

[0008] Preferably, a plurality of supporting rods are fixedly arranged between the outer circumferential surface of the mixing disk near the barrel wall of the collecting barrel and the collecting barrel, an opening is provided at the center of the mixing disk, a sleeve is rotatably provided on the side of the mixing disk away from the stirring rod, the sleeve is sleeved on the rotating rod and rotates synchronously with the rotating rod, a smooth notch is provided on the side of the sleeve near the stirring rod, a top block capable of extending into the smooth notch is fixedly provided on the end of the rotating rod near the stirring rod, an inclined block is fixedly provided on the side of each stirring rod near the mixing disk, a plurality of mixing rods are fixedly provided on the outer circumferential surface of the sleeve, the bottom of each mixing rod is tightly fitted with the surface of the mixing disk, and an inclined surface is provided on the end of each mixing rod away from the sleeve. As the stirring rod rotates, the inclined block can break up the protrusions flowing down from the upper soil leakage hole to prevent agglomeration.

[0009] Preferably, a plurality of powder bins are fixedly arranged on the outside of the collecting barrel, each of which has a powder cavity inside, each of which is fixedly arranged above the mixing plate, a detachably mounted bin cover is arranged at one end of each powder bin away from the collecting barrel, one end of each powder bin away from the bin cover extends into the collecting barrel, a connecting block is fixedly arranged at one end of each powder bin extending into the collecting barrel, a medicine spreading slot is opened on one side of each connecting block close to the rotating rod, each of which is connected to the powder cavity, a second slider that can isolate the connection between the powder cavity and the medicine spreading slot is slidably arranged inside each of which, an arc-shaped baffle is fixedly arranged on one side of each second slider away from the powder cavity, each of which gradually approaches the rotating rod along the flow direction of the soil block, and a plurality of second springs are connected between each of the second sliders and the connecting block. The arc-shaped baffle gradually approaches the rotating rod along the flow direction of the soil block, which can achieve the mixing of different amounts of powder in soil at different levels, and can effectively save the use of powder.

[0010] Preferably, each of the arc-shaped baffles is fixedly provided with a through hole at one end close to the second slide block, a hard pipe is slidably provided inside each of the through holes, and a plurality of air ports are provided at one end of each of the hard pipes extending into the through hole, which can blow the powder left in the powder chamber toward the direction of the rotating rod. An air pump is fixedly provided at the bottom of each of the connecting blocks, and each of the hard pipes is supplied with air through the air pump. The airflow from the air port can blow the powder falling from above toward the center of the collection bucket, thereby ensuring full contact between the powder and the soil.

[0011] Preferably, a bottom cover is fixedly provided above the bottom plate, the collecting bucket can be fitted over the bottom cover, a plurality of second hydraulic telescopic columns capable of lifting the collecting bucket are fixedly provided on the outer circumferential surface of the bottom of the collecting bucket, and a second hydraulic pump that provides hydraulic pressure to the second hydraulic telescopic columns is fixedly provided on the side of the bottom plate away from the collecting bucket.

[0012] Preferably, two conveyor belts for transporting soil blocks into the soil inlet bin are fixedly arranged above the bottom plate, a plurality of soil retaining plates are fixedly arranged on the outer surface of each of the conveyor belts, guard plates are fixedly arranged on both sides of each of the conveyor belts, a plurality of supporting legs are fixedly arranged on the side of each guard plate close to the bottom plate, and a fourth drive motor for driving the conveyor belts is fixedly arranged on the side of the two conveyor belts away from each other.

[0013] Preferably, a shoveling device capable of shoveling soil blocks onto the conveyor belt is provided on the side of each conveyor belt away from the collecting bucket, and two rows of track wheels for driving the device to move are provided on the side of the bottom plate away from the collecting bucket. Beneficial Effects

[0014] 1. The invention realizes the mixing of different amounts of medicine powder in different layers of soil by the cooperation of the arc-shaped baffle rod and the mixing rod, which can effectively save the use of medicine powder.

[0015] 2. The present invention achieves more uniform and comprehensive mixing of medicine powder and soil through the cooperation of arc-shaped baffle rods and hard pipes, which can effectively improve the efficiency of soil remediation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 A schematic diagram of a collection bucket;

[0019] Figure 4 is a front view of the collection bucket;

[0020] Figure 5 is a top view of the collection barrel;

[0021] Figure 6 for Figure 4 Axial section view at AA;

[0022] Figure 7 for Figure 5 Sectional view at the middle BB;

[0023] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0024] Fig. 9 for Figure 7 A partial enlarged view of point D in the middle.

[0025] In the figure: bottom plate 10, collecting bucket 11, soil feeding bin 12, crushing roller 13, screen 14, mixing disc 18, soil leakage hole 19, rotating rod 15, stirring rod 16, baffle 55, first hydraulic telescopic column 54, first hydraulic pump 56, driven gear 26, first drive motor 28, driving gear 27, second drive motor 57, protrusion 21, sliding cavity 22, first sliding block 23, push rod 24, flexible collar 20, first spring 25, slide groove 29, connecting rod 30, rack 33, third drive motor 31, half gear 32, support rod 34 , opening 39, sleeve 37, smooth groove 38, top block 36, inclined block 69, mixing rod 40, inclined surface 41, powder bin 17, powder chamber 53, bin cover 52, connecting block 42, medicine spreading groove 43, second slider 44, arc-shaped baffle rod 46, second spring 50, through hole 47, hard pipe 48, blowing port 51, air pump 49, bottom cover 60, second hydraulic telescopic column 58, second hydraulic pump 59, conveyor belt 63, retaining plate 64, guard plate 61, support leg 62, fourth drive motor 65, shoveling device 66, track wheel 67. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] In the description of the present invention, it should be noted that the terms "inside", "below", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] Combined with Figure 1-9A heavy metal contaminated soil remediation device comprises a bottom plate 10, a collecting bucket 11 is fixedly arranged above the bottom plate 10, two soil feeding bins 12 are fixedly arranged at one end of the collecting bucket 11 away from the bottom plate 10, two groups of crushing rollers 13 that can crush soil blocks are rotatably arranged inside the two soil feeding bins 12, each group of crushing rollers 13 is provided with a screen 14 that can screen out large stones near the bottom plate, a mixing plate 18 is fixedly arranged below the screen 14, a plurality of soil leakage holes 19 are opened on the surface of the mixing plate 18, and the inner center of the collecting bucket 11 is located at A rotating rod 15 is rotatably arranged, one end of the rotating rod 15 extends out of the interior of the collecting barrel 11, and a plurality of stirring rods 16 are fixedly arranged on the end of the rotating rod 15 extending into the interior of the collecting barrel 11. The stirring rods 16 are evenly distributed along the circumferential surface of the rotating rod 15, and a baffle 55 is fixedly arranged on the end of the rotating rod 15 extending deep into the interior of the collecting barrel 11. A plurality of first hydraulic telescopic columns 54 are fixedly arranged on the side of the baffle 55 close to the collecting barrel 11, and a first hydraulic pump 56 is fixedly arranged on the end of each first hydraulic telescopic column 54 away from the baffle 55.

[0029] Furthermore, each crushing roller 13 has one end extending out of the soil entry bin 12, and a driven gear 26 is fixedly provided on the end of each crushing roller 13 extending out of the soil entry bin 12, and each group of driven gears 26 are meshed and transmitted with each other. A first drive motor 28 is fixedly provided on the side of each soil entry bin 12 away from the baffle 55, and a driving gear 27 is fixedly provided on the output end of each drive motor 28, and the driving gear 27 and an adjacent driven gear 26 are meshed and transmitted with each other; one end of the rotating rod 15 extends out of the interior of the collecting barrel 11, and a second drive motor 57 is fixedly provided on the side of the baffle 55 away from the collecting barrel 11, and the output end of the second drive motor 57 is fixedly connected to the end of the rotating rod 15 extending out of the collecting barrel 11.

[0030] Furthermore, a plurality of protrusions 21 are evenly distributed on the outer circumferential surface of each crushing roller 13, a sliding cavity 22 is opened inside each protrusion 21, a first sliding block 23 is slidably arranged inside each sliding cavity 22, a push rod 24 is fixedly arranged at one end of each first sliding block 23 away from the crushing roller 13, a flexible collar 20 is arranged at one end of each push rod 24 away from the crushing roller 13, and a first spring 25 is connected between the side of the first sliding block 23 close to the crushing roller 13 and the protrusion 21.

[0031] Furthermore, a plurality of chutes 29 are provided on both sides of each soil feeding bin 12, and connecting rods 30 are fixedly provided on both sides of each screen 14. Each connecting rod 30 extends out of the soil feeding bin 12 through the chutes 29, and a rack 33 is fixedly provided on the side of the connecting rod 30 close to the crushing roller 13. A third drive motor 31 is fixedly provided above the chutes 29 on each side, and a half gear 32 is fixedly provided on the output end of each third drive motor 31, and the half gear 32 and the rack 33 are intermittently meshed for transmission.

[0032] Furthermore, a plurality of support rods 34 are fixedly arranged between the outer circumferential surface of the mixing disk 18 close to the barrel wall of the collecting barrel 11 and the collecting barrel 11, an opening 39 is opened at the center position of the mixing disk 18, a sleeve 37 is rotatably arranged on the side of the mixing disk 18 away from the stirring rod 16, the sleeve 37 is sleeved on the rotating rod 15 and rotates synchronously with the rotating rod 15, a smooth groove 38 is opened on the side of the sleeve 37 close to the stirring rod 16, a top block 36 capable of extending into the smooth groove 38 is fixedly arranged on one end of the rotating rod 15 close to the stirring rod 16, an inclined block 69 is fixedly arranged on the side of each stirring rod 16 close to the mixing disk 18, a plurality of mixing rods 40 are fixedly arranged on the outer circumferential surface of the sleeve 37, the bottom of each mixing rod 40 is tightly fitted with the surface of the mixing disk 18, and a bevel 41 is opened on the end of each mixing rod 40 away from the sleeve 37.

[0033] Furthermore, a plurality of powder bins 17 are fixedly arranged on the outside of the collecting barrel 11, each powder bin 17 has a powder cavity 53 formed therein, each powder bin 17 is fixedly arranged above the mixing plate 18, and a detachably mounted bin cover 52 is arranged at one end of each powder bin 17 away from the collecting barrel 11, and one end of each powder bin 17 away from the bin cover 52 extends into the collecting barrel 11, and a connecting block 42 is fixedly arranged at one end of each powder bin 17 extending into the collecting barrel 11, and each connecting block 42 is close to the rotating rod. A medicine spreading slot 43 is provided on one side of 15, each medicine spreading slot 43 is connected to the powder chamber 53, a second slider 44 is slidably arranged inside each medicine spreading slot 43, which can isolate the connection between the powder chamber 53 and the medicine spreading slot 43, and an arc-shaped baffle 46 is fixedly arranged on the side of each second slider 44 away from the powder chamber 53, each of the arc-shaped baffle 46 gradually approaches the rotating rod 15 along the flow direction of the soil block, and a plurality of second springs 50 are connected between each second slider 44 and the connecting block 42.

[0034] Furthermore, a through hole 47 is fixedly provided at one end of each arc-shaped baffle rod 46 close to the second slider 46, a hard pipe 48 is slidably provided inside each through hole 47, and one end of each hard pipe 48 extending into the through hole 47 is provided with a plurality of blowing ports 51 capable of blowing the powder remaining in the powder chamber 53 toward the direction of the rotating rod 15, an air pump 49 is fixedly provided at the bottom of each connecting block 42, and each hard pipe 48 is supplied with air through the air pump 49.

[0035] Furthermore, a bottom cover 60 is fixedly provided above the bottom plate 10, and the collecting barrel 11 can be fitted over the bottom cover 60. A plurality of second hydraulic telescopic columns 58 capable of lifting the collecting barrel 11 are fixedly provided on the outer circumferential surface of the bottom of the collecting barrel 11, and a second hydraulic pump 59 that provides hydraulic pressure to the second hydraulic telescopic columns 58 is fixedly provided on the side of the bottom plate 10 away from the collecting barrel 11.

[0036] Furthermore, two conveyor belts 63 for transporting soil blocks into the soil inlet bin 12 are fixedly arranged above the base plate 10, a plurality of soil retaining plates 64 are fixedly arranged on the outer surface of each conveyor belt 63, guard plates 61 are fixedly arranged on both sides of each conveyor belt 63, a plurality of supporting legs 62 are fixedly arranged on the side of each guard plate 61 close to the base plate 10, and a fourth driving motor 65 for driving the conveyor belts 63 is fixedly arranged on the side of the two conveyor belts 63 away from each other.

[0037] Furthermore, a shoveling device 66 capable of shoveling soil blocks onto the conveyor belt 63 is provided on the side of each conveyor belt 63 away from the collecting bucket 11, and two rows of track wheels 67 for driving the device to move are provided on the side of the bottom plate 10 away from the collecting bucket 11.

[0038] Working principle: Initially, first fill the powder bin 53 with enough powder that can improve the heavy metal content in the soil, then close the bin cover 52, start the track wheel 67 to bring the device to the vicinity of the soil to be repaired, then aim the shovel device 66 at the soil, start the fourth drive motor 65 to drive the conveyor belt 63 to start transmission. Start the first hydraulic pump 56 to control the first hydraulic telescopic column 54 to shorten, extend the rotating rod 15 to the longest distance inside the collection bucket 11, and then the first hydraulic telescopic column 54 stops shortening.

[0039] The first drive motor 28 and the air pump 49 are started, and the driving gear 27 starts to drive the driven gear 26 to rotate under the action of the first telescopic motor 28, and the crushing roller 13 inside the soil inlet bin 12 also starts to rotate synchronously. The third drive motor 31 is started, and under the action of the third drive motor 31, the half gear 32 starts to drive the screen 14 to bump up and down continuously.

[0040] After the equipment is in a stable state, the soil shoveling device 66 is started to shovel the contaminated soil onto the conveyor belt 63 at the rear. During the soil shoveling process, the surface soil within a certain range is first shoveled out, and then the equipment is operated to shovel out the soil in a slightly deeper layer. The heavy metal content of the surface soil is higher than that of the deep soil. The concentrated treatment of high-content heavy metal soil is more effective and convenient. The soil on the conveyor belt 63 will be brought to the soil inlet bin 12 by the conveyor belt 63. The soil entering the soil inlet bin 12 will be squeezed into small pieces by the crushing roller 13. If some larger and harder stones are wrapped in the soil, the push rod 24 will be pushed into the chute 29 when passing through the crushing roller 13. The flexible ring 20 will be concave to avoid large stones, allowing large stones to pass directly through the crushing roller 13. The soil pieces squeezed into small pieces will pass directly through the screen 14, while the large stones will fall above the screen 14. The up and down shaking of the screen 14 can make the small soil pieces flowing down from the top pass through the screen 14 quickly, while the large stone pieces cannot pass through the screen 14 and will be sent out into the soil bin.

[0041] When the soil block falls onto the mixing plate 18, the second driving motor 57 is started, and the rotating rod 15 also starts to rotate under the drive of the second driving motor 57, and the stirring rod 16 and the mixing rod 40 also start to rotate under the drive of the rotating rod 15. The inclined surface 41 on the mixing rod 40 will hit the arc-shaped baffle 46 when rotating. When the mixing rod 40 hits the arc-shaped baffle 46, the second slider 44 will overcome the elastic force of the second spring 50 and slide in the direction away from the stirring rod 16. When the second slider 44 slides, the powder inside the powder chamber 53 will fall downward through the medicine sprinkling slot 43. When the arc-shaped baffle 46 slides backward, the hard pipe 48 will extend out of the through hole 47, and the blowing port 51 on the surface of the hard pipe 48 will blow the powder falling from the top to the center of the collection barrel 11. Blowing the powder to the middle part of the collection barrel 11 can increase the contact area between the powder and the soil block, and can accelerate the repair of the heavy metal soil by the powder.

[0042] After the mixing rod 40 passes through the arc-shaped blocking rod 46, the second slider 44 will block the medicine spreading slot 43 again under the action of the second spring 50. The soil blocks falling on the mixing plate 18 will be directly dropped into the bottom of the collecting bucket 11 through the soil leakage hole by the mixing rod 40. When the soil blocks fall into the bottom of the collecting bucket 11, they will be broken up by the inclined block 69 above the stirring rod 16 and then fall into the bottom of the collecting bucket 11. Under the action of the stirring rod 16, the soil at the bottom of the collecting bucket 11 will be spread more evenly and loosely, which is conducive to the reaction between the medicine powder and the soil.

[0043] During the rotation of the rotating rod 15, the first hydraulic telescopic column 54 will gradually raise the rotating rod 15, and always keep the stirring rod 16 above the accumulated soil in the collecting barrel 11. After the surface soil is shoveled out, the position of the rotating rod 15 can make the top block 36 extend into the smooth groove 38. As the rotating rod 15 rises, the sleeve 37 will also be lifted and gradually away from the mixing plate 18. After the mixing rod 40 rises, the sliding distance between the arc-shaped blocking rod 46 and the inclined surface 41 gradually shortens, the retreat amount of the second slider 44 also gradually decreases, and the amount of powder falling from the powder chamber 53 also gradually decreases. The heavy metal content of deep soil is low, and there is no need to add the same powder dosage as that of the surface soil, which can greatly save the amount of powder.

[0044] When all the heavy metal contaminated soil in the area is collected in the collection barrel 11, all motors are turned off and the soil and powder are allowed to react in the collection barrel 11 for a period of time. After the reaction is completed, the second hydraulic pump 59 is started to control the second hydraulic telescopic column 58 to lift the collection barrel 11, and then the repaired soil is refilled back.

[0045] The above descriptions are merely embodiments of the present invention, and are not intended to limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heavy metal contaminated soil remediation device, comprising a bottom plate (10), a collecting bucket (11) being fixedly arranged above the bottom plate (10), characterized in that: Two soil feeding bins (12) are fixedly arranged at one end of the collecting bucket (11) away from the bottom plate (10), and two groups of crushing rollers (13) capable of crushing soil blocks are rotatably arranged inside the two soil feeding bins (12). A screen (14) capable of screening out large stones is arranged on the side close to the bottom plate of each group of crushing rollers (13), and a mixing plate (18) is fixedly arranged below the screen (14). A plurality of soil leakage holes (19) are opened on the surface of the mixing plate (18). A rotating rod (15) is rotatably arranged at the center position of the interior of the collecting bucket (11), and one end of the rotating rod (15) is Extending out of the interior of the collection barrel (11), a plurality of stirring rods (16) are fixedly arranged at one end of the rotating rod (15) extending into the interior of the collection barrel (11), and the stirring rods (16) are evenly distributed along the circumferential surface of the rotating rod (15); a baffle (55) is fixedly arranged at one end of the rotating rod (15) extending deep into the interior of the collection barrel (11); a plurality of first hydraulic telescopic columns (54) are fixedly arranged on one side of the baffle (55) close to the collection barrel (11); and a first hydraulic pump (56) is fixedly arranged at one end of each of the first hydraulic telescopic columns (54) away from the baffle (55); A plurality of support rods (34) are fixedly arranged between the outer circumferential surface of the mixing disk (18) close to the barrel wall of the collecting barrel (11) and the collecting barrel (11); an opening (39) is provided at the center of the mixing disk (18); a sleeve (37) is rotatably provided on the side of the mixing disk (18) away from the stirring rod (16); the sleeve (37) is sleeved on the rotating rod (15) and rotates synchronously with the rotating rod (15); a smooth notch (38) is provided on the side of the sleeve (37) close to the stirring rod (16); A top block (36) capable of extending into the smooth notch (38) is fixedly arranged at one end of the rotating rod (15) close to the stirring rod (16); an inclined block (69) is fixedly arranged at one side of each stirring rod (16) close to the mixing disk (18); a plurality of mixing rods (40) are fixedly arranged on the outer circumferential surface of the sleeve (37); the bottom of each mixing rod (40) is tightly fitted with the surface of the mixing disk (18); and a bevel (41) is formed at one end of each mixing rod (40) away from the sleeve (37); A plurality of powder bins (17) are fixedly arranged on the outside of the collecting barrel (11), each of the powder bins (17) has a powder cavity (53) formed therein, each of the powder bins (17) is fixedly arranged above the mixing plate (18), a detachably mounted bin cover (52) is arranged at one end of each powder bin (17) away from the collecting barrel (11), one end of each powder bin (17) away from the bin cover (52) extends into the collecting barrel (11), a connecting block (42) is fixedly arranged at one end of each powder bin (17) extending into the collecting barrel (11), and each of the connecting blocks (42) is close to the rotating disc. A medicine spreading slot (43) is provided on one side of the rod (15), each of the medicine spreading slots (43) is connected to the medicine powder chamber (53), a second slider (44) is slidably arranged inside each of the medicine spreading slots (43) and is capable of isolating the connection between the medicine powder chamber (53) and the medicine spreading slot (43), an arc-shaped blocking rod (46) is fixedly arranged on the side of each of the second sliders (44) away from the medicine powder chamber (53), each of the arc-shaped blocking rods (46) gradually approaches the rotating rod (15) along the flow direction of the soil block, and a plurality of second springs (50) are connected between each of the second sliders (44) and the connecting block (42); A through hole (47) is fixedly provided at one end of each arc-shaped blocking rod (46) close to the second sliding block (44), a hard pipe (48) is slidably provided inside each through hole (47), and a plurality of blowing ports (51) are provided at one end of each hard pipe (48) extending into the through hole (47) so as to blow the powder remaining in the powder chamber (53) toward the direction of the rotating rod (15), an air pump (49) is fixedly provided at the bottom of each connecting block (42), and each hard pipe (48) is supplied with air through the air pump (49); A bottom cover (60) is fixedly arranged above the bottom plate (10), and the collection barrel (11) can be sleeved on the bottom cover (60). A plurality of second hydraulic telescopic columns (58) capable of lifting the collection barrel (11) are fixedly arranged on the outer circumferential surface of the bottom of the collection barrel (11), and a second hydraulic pump (59) for providing hydraulic pressure to the second hydraulic telescopic columns (58) is fixedly arranged on a side of the bottom plate (10) away from the collection barrel (11).

2. A heavy metal contaminated soil remediation device according to claim 1, characterized in that: One end of each crushing roller (13) extends out of the soil entry bin (12), and a driven gear (26) is fixedly arranged at the end of each crushing roller (13) extending out of the soil entry bin (12), and each group of driven gears (26) mesh with each other for transmission. A first driving motor (28) is fixedly arranged on the side of each soil entry bin (12) away from the baffle (55), and a driving gear (27) is fixedly arranged at the output end of each first driving motor (28), and the driving gear (27) and an adjacent driven gear (26) mesh with each other for transmission; one end of the rotating rod (15) extends out of the interior of the collecting barrel (11), and a second driving motor (57) is fixedly arranged on the side of the baffle (55) away from the collecting barrel (11), and the output end of the second driving motor (57) is fixedly connected to the end of the rotating rod (15) extending out of the collecting barrel (11).

3. The heavy metal contaminated soil remediation equipment according to claim 1, characterized in that: A plurality of protrusions (21) are evenly distributed on the outer circumferential surface of each crushing roller (13), each protrusion (21) has a sliding cavity (22) formed inside, a first sliding block (23) is slidably arranged inside each sliding cavity (22), a push rod (24) is fixedly arranged at one end of each first sliding block (23) away from the crushing roller (13), a flexible collar (20) is arranged at one end of each push rod (24) away from the crushing roller (13), and a first spring (25) is connected between the side of the first sliding block (23) close to the crushing roller (13) and the protrusion (21).

4. The heavy metal contaminated soil remediation equipment according to claim 1, characterized in that: A plurality of chute grooves (29) are provided on both sides of each soil inlet bin (12); a connecting rod (30) is fixedly provided on both sides of each screen (14); each connecting rod (30) extends out of the soil inlet bin (12) through the chute groove (29); a rack (33) is fixedly provided on the side of the connecting rod (30) close to the crushing roller (13); a third driving motor (31) is fixedly provided above the chute groove (29) on each side; a half gear (32) is fixedly provided at the output end of each third driving motor (31); and the half gear (32) and the rack (33) are intermittently meshed for transmission.

5. The heavy metal contaminated soil remediation equipment according to claim 1, characterized in that: Two conveyor belts (63) for conveying soil blocks into the soil inlet bin (12) are fixedly arranged above the bottom plate (10); a plurality of soil retaining plates (64) are fixedly arranged on the outer surface of each conveyor belt (63); guard plates (61) are fixedly arranged on both sides of each conveyor belt (63); a plurality of supporting legs (62) are fixedly arranged on the side of each guard plate (61) close to the bottom plate (10); and a fourth driving motor (65) for driving the conveyor belts (63) is fixedly arranged on the side away from each other.

6. The heavy metal contaminated soil remediation equipment according to claim 5, characterized in that: A shoveling device (66) capable of shoveling soil blocks onto the conveyor belt (63) is provided on one side of each conveyor belt (63) away from the collecting bucket (11), and two rows of crawler wheels (67) for driving the device to move are provided on one side of the bottom plate (10) away from the collecting bucket (11).

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