Heavy metal contaminated soil purification equipment

Abstract

The invention discloses heavy metal contaminated soil purification equipment, and relates to the technical field of soil purification, the heavy metal contaminated soil purification equipment comprises a purification box, a stirring mechanism is arranged in the purification box, the stirring mechanism comprises a rotating lead screw arranged in the purification box, the rotating lead screw is fixedly connected with a second stirring rod, and the rotating lead screw is fixedly connected with a fixing rod; the fixing rod is in sliding connection with a fifth gear, the fifth gear is in meshed connection with a fourth gear, the fourth gear is fixedly connected with a worm, the worm is in meshed connection with a turbine, the turbine is fixedly connected with a third connecting plate, and the third connecting plate is rotationally connected with a first connecting plate. Cooperative operation is achieved through mechanical transmission, the second stirring rod moves up and down while rotating and stirring are conducted, meanwhile, soil is turned over, the vertical layered structure of the soil is broken, uniform permeation of pesticide liquid is promoted, and the soil purification effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil purification, and in particular to a device for purifying heavy metal-contaminated soil. Background Art

[0002] Human activities such as industrial pollutant emissions, agricultural activities, and mineral mining result in large amounts of heavy metals such as lead, cadmium, and mercury entering the soil. Heavy metal-contaminated soil is characterized by regional differences, wide-ranging pollution, and deep-seated contamination. It not only destroys soil structure, reduces soil fertility, and affects plant growth, but also enters the human body through the food chain, endangering human health. Soil leaching technology uses a cleaning fluid to transfer heavy metals from the soil solid phase to the soil liquid phase through dissolution, desorption, and reverse complexation, and then disposes of the wastewater. This technology is more suitable for construction land soil and sandy soil. Its advantages lie in its ability to concentrate pollutants, its simplicity, controllable costs, large processing capacity, and rapid effectiveness, making it an important means of remediating heavily contaminated soil.

[0003] A search revealed Chinese patent number CN108160186B, which discloses a purification device for treating heavy metal-contaminated soil. The device comprises a pretreatment unit, a filter press, a microbial treatment unit, and a baking unit. The pretreatment unit includes a pretreatment body, a pulverizing unit, and a stirring unit. The pulverizing unit comprises a pulverizing roller and a pulverizing motor. The pulverizing rollers comprise active and passive pulverizing rollers, each with pulverizing teeth distributed around its circumference. The stirring unit comprises a stirring motor, a stirring shaft, and spiral blades. A liquid medicine tank is provided externally to the pretreatment body, with a nozzle hingedly connected to one side of the tank. The filter press comprises a filter press body and a filter press component. The discharge port of the filter press is connected to the feed port of the microbial treatment unit, which in turn is connected to the baking unit. This device, through the pretreatment unit, the filter press, the microbial treatment unit, and the baking unit, can purify soil and prevent heavy metals from remaining in the soil water after reaction.

[0004] However, in actual use, the above-mentioned device is difficult to prevent the vertical stratification of soil particles, resulting in uneven penetration of the liquid medicine, which may cause excessive concentration of the liquid medicine in some areas, resulting in waste. At the same time, it makes it difficult for heavy metals in deep soil or in the gaps between particles to be fully contacted, affecting the soil purification effect. Therefore, it is necessary to propose a heavy metal contaminated soil purification device. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that it is difficult to prevent the vertical stratification of soil particles, resulting in uneven penetration of the drug solution, which may cause excessively high drug solution concentration in some areas and lead to waste. At the same time, it makes it difficult for heavy metals in deep soil or in the gaps between particles to be fully contacted, affecting the soil purification effect. A heavy metal contaminated soil purification device is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A heavy metal contaminated soil purification device includes a purification box, a stirring mechanism is provided inside the purification box, the stirring mechanism includes a rotating screw arranged inside the purification box, the rotating screw is fixedly connected to a second stirring rod, the rotating screw is fixedly connected to a fixed rod, the fixed rod is slidably connected to a fifth gear, the fifth gear is meshedly connected to a fourth gear, the fourth gear is fixedly connected to a worm, the worm is meshedly connected to a turbine, the turbine is fixedly connected to a third connecting plate, the third connecting plate is rotatably connected to a first connecting plate, the first connecting plate is rotatably connected to a second connecting plate, the second connecting plate is fixedly connected to the first gear, and the first gear and the rotating screw are meshedly connected;

[0008] A soil turning mechanism is provided inside the purification box, and the soil turning mechanism includes a second gear fixedly connected to the rotating screw, the second gear is meshedly connected to the third gear, the third gear is meshedly connected to the gear ring, the upper part of the gear ring is fixedly connected to a cylindrical pin, the cylindrical pin is slidably connected to a ring sleeve, the ring sleeve is rotatably connected to a round block, and one side of the ring sleeve is fixedly connected to a flap.

[0009] The rings, round blocks and flaps are all arranged in multiple groups, which facilitates turning the soil inside the purification box at multiple angles and reduces the vertical stratification of the soil.

[0010] The above technical solution further includes:

[0011] The rotating screw and the purification box are movably connected, the fifth gear and the purification box are rotationally connected, the fourth gear and the purification box are rotationally connected, the worm and the purification box are rotationally connected, the turbine and the purification box are rotationally connected, and the first gear and the purification box are rotationally connected;

[0012] The rotating screw rod will rise and fall inside the purification box and will rotate at the same time.

[0013] The interior of the purification box is fixedly connected to a guide plate, the rotating screw is rotatably connected to a fixed frame, the third gear is rotatably connected to the fixed frame, the upper part of the third gear is fixedly connected to a circular ring, the gear ring and the circular ring are rotatably connected, and the circular block and the circular ring are fixedly connected.

[0014] A motor is fixedly installed on one side of the purification box, and a third rotating shaft is provided at the output end of the motor. The third rotating shaft is fixedly connected to the second bevel gear set, and the second bevel gear set is fixedly connected to the first rotating shaft. The first rotating shaft and the purification box are rotationally connected, and the first rotating shaft is transmission-connected to a belt, and the worm and the belt are transmission-connected.

[0015] A first connecting rod is fixedly connected to one side of the third rotating shaft, a second connecting rod is rotatably connected to a side of the first connecting rod away from the third rotating shaft, a flow tube is rotatably connected to a side of the second connecting rod away from the first connecting rod, and the flow tube is slidably connected to the purification box;

[0016] Wherein, both sides of the flow pipe are slidably connected to the purification box, so that the flow pipe remains stable when moving.

[0017] A rack is fixedly connected to the interior of the purification box, the rack is meshed with a sixth gear, the sixth gear is fixedly connected to a fourth rotating shaft, and the fourth rotating shaft is rotationally connected to the circulation pipe.

[0018] The fourth rotating shaft is fixedly connected to the first bevel gear set, the first bevel gear set is fixedly connected to the second rotating shaft, and the second rotating shaft is rotationally connected to the circulation pipe.

[0019] The upper portion of the circulation tube is fixedly connected to a medicine storage box, the second rotating shaft passes through the medicine storage box and extends into the interior of the medicine storage box, the second rotating shaft is fixedly connected to the first stirring rod, and the upper portion of the second rotating shaft is provided with a medicine adding port;

[0020] The first stirring rod is convenient for stirring the interior of the medicine storage box when the second rotating shaft rotates, thereby preventing the medicine solution from settling.

[0021] A medicine outlet pipe is provided on one side of the medicine storage box, a second pump body is provided at the connection between the medicine outlet pipe and the circulation pipe, and a nozzle is provided at the lower part of the circulation pipe.

[0022] A liquid outlet pipe is provided at the lower part of the purification box, a first pump body is provided at the connection between the liquid outlet pipe and the purification box, and a filter screen is provided at the inlet of the liquid outlet pipe.

[0023] The present invention has the following beneficial effects:

[0024] 1. In the present invention, the stirring mechanism and the soil turning mechanism inside the purification box work together through mechanical transmission, so that the second stirring rod moves up and down while rotating and stirring, and at the same time turns the soil, breaking the vertical layered structure of the soil, promoting uniform penetration of the liquid medicine, and improving the soil purification effect.

[0025] 2. In the present invention, the first connecting rod is driven to rotate by the third rotating shaft, and finally the second connecting rod drives the flow tube to slide back and forth on the upper part of the purification box, so as to evenly spray the liquid medicine inside the purification box and prevent the waste caused by excessive local spraying of liquid medicine.

[0026] 3. In the present invention, when the circulation tube reciprocates, it will drive the sixth gear and the fourth rotating shaft to rotate under the action of the rack, and finally the second rotating shaft inside the medicine storage box drives the first stirring rod to rotate, so as to prevent the medicine liquid inside the medicine storage box from precipitating, affecting the uniformity of the medicine liquid, and preventing it from affecting soil purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a heavy metal contaminated soil purification device proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the lower structure of the purification box in the present invention;

[0029] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0030] Figure 4 This is a cross-sectional view of the internal structure of the purification box in the present invention;

[0031] Figure 5 Schematic diagram of the soil turning mechanism in the present invention;

[0032] Figure 6 for Figure 1 A schematic diagram of the structure at center A;

[0033] Figure 7 for Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0034] Figure 8 for Figure 3 Enlarged schematic diagram of the structure at point C in the middle.

[0035] Figure: 1, purification box; 2, circulation pipe; 3, medicine storage box; 4, first rotating shaft; 5, rotating screw; 6, fixed rod; 7, medicine adding port; 8, first pump body; 9, liquid outlet pipe; 10, first connecting plate; 11, second connecting plate; 12, first gear; 13, second pump body; 14, medicine outlet pipe; 15, guide plate; 16, nozzle; 17, second rotating shaft; 18, first stirring rod; 19, second gear; 20, third gear; 21, fixed frame; 22, flip Plate; 23. Ring; 24. Second stirring rod; 25. Gear ring; 26. Cylindrical pin; 27. Ring sleeve; 28. Round block; 29. ​​Motor; 30. Third rotating shaft; 31. First connecting rod; 32. Second connecting rod; 33. Belt; 34. Worm; 35. Fourth gear; 36. Fifth gear; 37. Turbine; 38. Third connecting plate; 39. Rack; 40. Sixth gear; 41. Fourth rotating shaft; 42. First bevel gear set; 43. Second bevel gear set. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 as well as Figure 7 A heavy metal contaminated soil purification device includes a purification box 1, a stirring mechanism is provided inside the purification box 1, the stirring mechanism includes a rotating screw 5 arranged inside the purification box 1, the rotating screw 5 is fixedly connected to the second stirring rod 24, the rotating screw 5 is fixedly connected to the fixed rod 6, the fixed rod 6 is slidably connected to the fifth gear 36, the fifth gear 36 is meshedly connected to the fourth gear 35, the fourth gear 35 is fixedly connected to the worm 34, the worm 34 is meshedly connected to the turbine 37, the turbine 37 is fixedly connected to the third connecting plate 38, the third connecting plate 38 is rotatably connected to the first connecting plate 10, the first connecting plate 10 is rotatably connected to the second connecting plate 11, the second connecting plate 11 is fixedly connected to the first gear 12, and the first gear 12 is meshed with the rotating screw 5;

[0039] A soil turning mechanism is provided inside the purification box 1, which includes a second gear 19 fixedly connected to the rotating screw 5, the second gear 19 is meshedly connected to the third gear 20, the third gear 20 is meshedly connected to the gear ring 25, the upper part of the gear ring 25 is fixedly connected to a cylindrical pin 26, the cylindrical pin 26 is slidably connected to a ring sleeve 27, the ring sleeve 27 is rotatably connected to a round block 28, and a flap 22 is fixedly connected to one side of the ring sleeve 27.

[0040] refer to Figure 2 、 Figure 4 as well as Figure 7 The rotating screw 5 is movably connected to the purification box 1, the fifth gear 36 is rotationally connected to the purification box 1, the fourth gear 35 is rotationally connected to the purification box 1, the worm 34 is rotationally connected to the purification box 1, the turbine 37 is rotationally connected to the purification box 1, and the first gear 12 is rotationally connected to the purification box 1.

[0041] refer to Figure 3 、 Figure 4 as well as Figure 5 The inside of the purification box 1 is fixedly connected to the guide plate 15, the rotating screw 5 is rotatably connected to the fixed frame 21, the third gear 20 is rotatably connected to the fixed frame 21, the upper part of the third gear 20 is fixedly connected to the ring 23, the gear ring 25 is rotatably connected to the ring 23, and the round block 28 is fixedly connected to the ring 23.

[0042] refer to Figure 1 as well as Figure 6 A motor 29 is fixedly installed on one side of the purification box 1, and a third rotating shaft 30 is provided at the output end of the motor 29. The third rotating shaft 30 is fixedly connected to the second bevel gear set 43, and the second bevel gear set 43 is fixedly connected to the first rotating shaft 4. The first rotating shaft 4 and the purification box 1 are rotationally connected, and the first rotating shaft 4 is transmission-connected to the belt 33, and the worm 34 and the belt 33 are transmission-connected.

[0043] In this embodiment, when it is necessary to purify soil contaminated with heavy metals, the heavy metal contaminated soil is placed into the purification box 1 from the upper part. At this time, under the action of the guide plate 15, which has a certain inclination angle and is arranged around the bottom surface of the purification box 1, the heavy metal contaminated soil will slide toward the rotating screw 5. When the heavy metal removal liquid is sprayed into the purification box 1, the motor 29 is started to rotate the third rotating shaft 30 arranged at its output end. The third rotating shaft 30 drives the fixedly connected second bevel gear set 43 to rotate. The second bevel gear set 43 causes the fixedly connected first rotating shaft 4 to rotate. The rotation of the first rotating shaft 4 drives the worm 34 to rotate through the transmission belt 33. The rotation of the worm 34 causes the fixedly connected fourth gear 35 to rotate.

[0044] When the fourth gear 35 rotates, it drives the meshing connected fifth gear 36 to rotate. The fifth gear 36 is slidably connected to the fixed rod 6 fixedly connected around the rotating screw rod 5. The rotation of the fifth gear 36 drives the rotating screw rod 5 to rotate through the engagement between the fifth gear 36 and the fixed rod 6. The rotation of the rotating screw rod 5 drives the second stirring rod 24 fixedly connected to the rotating screw rod 5 to rotate, that is, the second stirring rod 24 facilitates the stirring of the heavy metal contaminated soil added to the purification box 1. When the worm 34 rotates, it also drives the meshing connected turbine 37 to rotate. The rotation of the turbine 37 will make the fixed connection The third connecting plate 38 rotates, and the rotation of the third connecting plate 38 drives the second connecting plate 11 to rotate through the first connecting plate 10 to which it is rotatably connected. The rotation of the second connecting plate 11 drives the first gear 12 to which it is fixed to rotate. Under the action of the first connecting plate 10 and the second connecting plate 11, the second pump body 13 continuously rotates forward and reverse. Since the first gear 12 and the rotating screw rod 5 are meshed, the rotating screw rod 5 is eventually driven to reciprocate up and down inside the purification box 1. That is, the second stirring rod 24 moves up and down while rotating and stirring, so as to break the soil stratification phenomenon inside the purification box 1.

[0045] When the screw rod 5 rotates, the second gear 19 that is fixedly connected will be driven to rotate. The second gear 19 will cause the meshing third gear 20 to rotate. The third gear 20 will drive the meshing gear ring 25 to rotate. The rotation of the gear ring 25 will drive the cylindrical pin 26 fixedly connected to the upper part to rotate in a circular manner. The rotation of the cylindrical pin 26 will continuously pass through the slide groove with a certain curvature inside the ring sleeve 27. The round block 28 and the ring 23 that are rotatably connected to the ring sleeve 27 are fixedly connected, that is, the ring sleeve 27 will continuously rotate under the action of the cylindrical pin 26. At this time, the flap 22 fixedly connected to one side of the ring sleeve 27 can continuously flip the soil, which is convenient for breaking the vertical layered structure of the soil, promoting uniform penetration of the liquid medicine, and improving the soil purification effect.

[0046] Example 2

[0047] refer to Figure 1 as well as Figure 6 A first connecting rod 31 is fixedly connected to one side of the third rotating shaft 30, and a second connecting rod 32 is rotatably connected to the side of the first connecting rod 31 away from the third rotating shaft 30. The second connecting rod 32 is rotatably connected to the side of the second connecting rod 32 away from the first connecting rod 31, and the circulation tube 2 and the purification box 1 are slidably connected.

[0048] refer to Figure 3 as well as Figure 8 A rack 39 is fixedly connected to the interior of the purification box 1, and the rack 39 is meshed with a sixth gear 40. The sixth gear 40 is fixedly connected to a fourth rotating shaft 41, and the fourth rotating shaft 41 is rotationally connected to the circulation pipe 2.

[0049] refer to Figure 3 as well as Figure 8 The fourth rotating shaft 41 is fixedly connected to the first bevel gear set 42 , the first bevel gear set 42 is fixedly connected to the second rotating shaft 17 , and the second rotating shaft 17 is rotationally connected to the circulation pipe 2 .

[0050] refer to Figure 1 、 Figure 3 as well as Figure 8 The upper part of the circulation tube 2 is fixedly connected to the medicine storage box 3, the second rotating shaft 17 passes through the medicine storage box 3 and extends to the interior of the medicine storage box 3, the second rotating shaft 17 is fixedly connected to the first stirring rod 18, and the upper part of the second rotating shaft 17 is provided with a medicine adding port 7.

[0051] refer to Figure 3 A medicine outlet pipe 14 is provided on one side of the medicine storage box 3 , a second pump body 13 is provided at the connection between the medicine outlet pipe 14 and the circulation pipe 2 , and a nozzle 16 is provided at the lower part of the circulation pipe 2 .

[0052] refer to Figure 2 A liquid outlet pipe 9 is provided at the lower part of the purification box 1, a first pump body 8 is provided at the connection between the liquid outlet pipe 9 and the purification box 1, and a filter is provided at the inlet of the liquid outlet pipe 9.

[0053] In this embodiment, when the third rotating shaft 30 rotates, it will drive the first connecting rod 31 fixedly connected to one side to rotate, and the first connecting rod 31 will rotate in a circle with the third rotating shaft 30 as the center. The first connecting rod 31 will cause the rotatably connected second connecting rod 32 to drive the circulation tube 2 to slide back and forth on the purification box 1. When the circulation tube 2 slides, the rotatably connected fourth rotating shaft 41 will be driven to slide at the same time, but the sixth gear 40 fixedly connected to the fourth rotating shaft 41 is meshed with the rack 39 fixedly connected inside the purification box 1. That is, when the circulation tube 2 finally slides, the sixth gear 40 will rotate, and the rotation of the sixth gear 40 will drive the fixedly connected first bevel gear set 42 to rotate. The first bevel gear set 42 will cause the fixedly connected second rotating shaft 17 to rotate, and the second rotating shaft 17 will drive the first stirring rod 18 to rotate, so that the first stirring rod 18 can stir the liquid medicine inside the medicine storage box 3 to prevent the liquid medicine from settling and affecting the removal effect of heavy metals in the soil;

[0054] The medicine adding port 7 provided on the upper part of the medicine storage box 3 is convenient for adding medicine liquid into the medicine storage box 3. When the circulation tube 2 slides back and forth, the second pump body 13 is started, and the medicine liquid inside the medicine storage box 3 can be continuously sent into the circulation tube 2 through the medicine outlet pipe 14. Finally, the medicine liquid is evenly sprayed on various areas inside the purification box 1 through the multiple nozzles 16 provided at the lower part of the circulation tube 2. After purifying the heavy metal contaminated soil, the first pump body 8 provided at the lower part of the purification box 1 is started to facilitate the discharge of the medicine liquid doped with heavy metals through the liquid outlet pipe 9. A filter is provided at the inlet of the liquid outlet pipe 9 to prevent the soil from being discharged together.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A heavy metal contaminated soil purification device, comprising a purification box (1), characterized in that: The purification box (1) is provided with a stirring mechanism inside, and the stirring mechanism includes a rotating screw (5) arranged inside the purification box (1), the rotating screw (5) is fixedly connected to the second stirring rod (24), the rotating screw (5) is fixedly connected to the fixed rod (6), the fixed rod (6) is slidably connected to the fifth gear (36), the fifth gear (36) is meshedly connected to the fourth gear (35), the fourth gear (35) is fixedly connected to the worm (34), the worm (34) is meshedly connected to the turbine (37), the turbine (37) is fixedly connected to the third connecting plate (38), the third connecting plate (38) is rotatably connected to the first connecting plate (10), the first connecting plate (10) is rotatably connected to the second connecting plate (11), the second connecting plate (11) is fixedly connected to the first gear (12), and the first gear (12) and the rotating screw (5) are meshedly connected; The interior of the purification box (1) is provided with a soil turning mechanism, which comprises a second gear (19) fixedly connected to the rotating screw (5), the second gear (19) being meshedly connected to a third gear (20), the third gear (20) being meshedly connected to a gear ring (25), the upper portion of the gear ring (25) being fixedly connected to a cylindrical pin (26), the cylindrical pin (26) being slidably connected to a ring sleeve (27), the ring sleeve (27) being rotatably connected to a round block (28), and one side of the ring sleeve (27) being fixedly connected to a flap (22).

2. The heavy metal contaminated soil purification equipment according to claim 1, characterized in that: The rotating screw (5) is movably connected to the purification box (1), the fifth gear (36) is rotationally connected to the purification box (1), the fourth gear (35) is rotationally connected to the purification box (1), the worm (34) is rotationally connected to the purification box (1), the turbine (37) is rotationally connected to the purification box (1), and the first gear (12) is rotationally connected to the purification box (1).

3. The heavy metal contaminated soil purification equipment according to claim 1, characterized in that: The interior of the purification box (1) is fixedly connected to a guide plate (15), the rotating screw (5) is rotatably connected to a fixed frame (21), the third gear (20) is rotatably connected to the fixed frame (21), the upper part of the third gear (20) is fixedly connected to a ring (23), the gear ring (25) is rotatably connected to the ring (23), and the round block (28) is fixedly connected to the ring (23).

4. The heavy metal contaminated soil purification equipment according to claim 1, characterized in that: A motor (29) is fixedly mounted on one side of the purification box (1); a third rotating shaft (30) is provided at the output end of the motor (29); the third rotating shaft (30) is fixedly connected to a second bevel gear set (43); the second bevel gear set (43) is fixedly connected to a first rotating shaft (4); the first rotating shaft (4) and the purification box (1) are rotationally connected; the first rotating shaft (4) is transmission-connected to a belt (33); and the worm (34) and the belt (33) are transmission-connected.

5. The heavy metal contaminated soil purification equipment according to claim 4, characterized in that: One side of the third rotating shaft (30) is fixedly connected to a first connecting rod (31); the side of the first connecting rod (31) away from the third rotating shaft (30) is rotatably connected to a second connecting rod (32); the side of the second connecting rod (32) away from the first connecting rod (31) is rotatably connected to a flow tube (2); and the flow tube (2) and the purification box (1) are slidably connected.

6. The heavy metal contaminated soil purification equipment according to claim 1, characterized in that: A rack (39) is fixedly connected to the interior of the purification box (1), the rack (39) is meshedly connected to a sixth gear (40), the sixth gear (40) is fixedly connected to a fourth rotating shaft (41), and the fourth rotating shaft (41) is rotationally connected to the circulation pipe (2).

7. The heavy metal contaminated soil purification equipment according to claim 6, characterized in that: The fourth rotating shaft (41) is fixedly connected to the first bevel gear set (42), the first bevel gear set (42) is fixedly connected to the second rotating shaft (17), and the second rotating shaft (17) is rotationally connected to the circulation pipe (2).

8. The heavy metal contaminated soil purification equipment according to claim 7, characterized in that: The upper portion of the circulation tube (2) is fixedly connected to a medicine storage box (3), the second rotating shaft (17) passes through the medicine storage box (3) and extends to the interior of the medicine storage box (3), the second rotating shaft (17) is fixedly connected to a first stirring rod (18), and a medicine adding port (7) is provided on the upper portion of the second rotating shaft (17).

9. The heavy metal contaminated soil purification equipment according to claim 8, characterized in that: A medicine outlet pipe (14) is provided on one side of the medicine storage box (3), a second pump body (13) is provided at the connection between the medicine outlet pipe (14) and the circulation pipe (2), and a nozzle (16) is provided at the lower part of the circulation pipe (2).

10. The heavy metal contaminated soil purification equipment according to claim 9, characterized in that: A liquid outlet pipe (9) is provided at the lower portion of the purification box (1), a first pump body (8) is provided at the connection between the liquid outlet pipe (9) and the purification box (1), and a filter is provided at the inlet of the liquid outlet pipe (9).

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