A device and method for repairing river and lake sediments polluted by heavy metals based on biological fillers

Abstract

The present invention discloses a heavy metal-contaminated river and lake sediment repair device and method based on biological fillers, including a hull, and also including: a sediment processing unit, including a tube body inserted on the hull, two groups of rollers respectively arranged at the two ends of the lower side of the tube body and used to contact the bottom of the water, and a scraper arranged at the lower end of the tube body and connected to the shaft of the roller; a repair box arranged on the hull, a biological filler layer is arranged in the repair box, and a discharge pipe penetrating the hull is arranged at the bottom of the repair box; and a pump body arranged on the repair box, an input end of which is connected to the tube body, and the other end is connected to the repair box. In the present invention, when the hull moves and extracts sediment through the pump body, the roller contacts the bottom of the water and rolls, thereby driving the scraper to rotate, and the scraper rotates to scrape the sediment attached to the bottom of the water, so that the sediment is better extracted to the repair box for repair treatment, ensuring the amount of extracted sediment, and having a high sediment repair effect.

Description

Technical Field

[0001] The present invention relates to the technical field of river and lake sediment restoration, and in particular to a device and method for restoring river and lake sediment contaminated by heavy metals based on biological fillers. Background Art

[0002] Heavy metals such as lead, cadmium, chromium, copper, etc., pose a serious threat to aquatic ecosystems and human health due to their concealment, high toxicity, long-term nature and irreversibility. River and lake sediments are important reservoirs of heavy metals at the bottom of water bodies, and their pollution status directly affects the overall environmental quality of water bodies. At present, most of them use restoration equipment to treat river and lake sediments.

[0003] Publication No.: CN116573826A proposes a heavy metal polluted river and lake sediment repair device, which discloses: comprising a hull and a repair cylinder, the top of the hull is telescopically connected to a sludge pipe, an array of rotating rods are arranged in the sludge pipe, a filter plate is arranged in the sludge pipe, a second sludge pump is arranged between the repair cylinder and the sludge pipe, a fixed plate is arranged in the repair cylinder, and a through hole is arranged on the fixed plate, a baffle is arranged on the top of the fixed plate, and a stirring mechanism is rotatably connected in the repair cylinder.

[0004] Although the above-mentioned repair device can extract river and lake bottom mud for repair treatment through a pump body, a sludge pipe and a telescopic pipe, since the river and lake bottom mud has strong viscosity and high adhesion to the water bottom, most of the river and lake bottom mud adheres to the water bottom and is difficult to be directly extracted or the amount of river and lake bottom mud extracted is small, which affects the repair effect of the river and lake bottom mud. For this reason, we propose a heavy metal contaminated river and lake bottom mud repair device and method based on biological fillers. Summary of the invention

[0005] The purpose of the present invention is to provide a heavy metal polluted river and lake sediment repair device and method based on biological fillers to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A heavy metal polluted river and lake sediment repair device based on biological filler, comprising a hull and:

[0008] The bottom mud treatment part includes a tube body inserted on the hull, two groups of rollers respectively arranged at the two ends of the lower side of the tube body and used to contact the bottom of the water, and a scraper arranged at the lower end of the tube body and connected to the shaft of the roller, wherein the scraper is used to rotate and scrape the bottom mud attached to the bottom of the water when the roller rolls;

[0009] A repair box is arranged on the hull, wherein a biological filler layer for removing heavy metals in the bottom mud is arranged in the repair box, and a discharge pipe penetrating the hull is arranged at the bottom of the repair box; and,

[0010] The pump body is arranged on the repair box, an input end of the pump body is connected with the pipe body, and the other end of the pump body is connected with the repair box.

[0011] A further improvement is that the tube body comprises:

[0012] A telescopic hose, the top of which is closed and fixedly inserted on the hull, a support ring is fixedly provided on the bottom of the telescopic hose, and the support ring is connected to the output end of the telescopic device provided on the hull;

[0013] A movable tube, wherein the movable sleeve is arranged at the lower end of the telescopic hose and below the support ring, and the roller is rotatably arranged on the outer wall of the movable tube; and,

[0014] The elastic member is sleeved on the outer wall of the telescopic hose, and one end of the elastic member is connected to the supporting ring, and the other end is connected to the movable tube.

[0015] A further improvement is that the scraper is arranged at one end of the elastic telescopic member, the other end of the elastic telescopic member extends into a protective shell, the protective shell is fixedly arranged in the movable tube, a rotating shaft 1 parallel to the shaft of the roller is inserted into one side of the protective shell, one end of the rotating shaft 1 and an end of the elastic telescopic member located in the protective shell are connected by a bevel gear set, and the bevel gear set is located in the protective shell, and the other end of the rotating shaft 1 is connected by a shaft of a roller by a sprocket transmission group.

[0016] A further improvement is that the outer wall of the elastic telescopic member is provided with a plurality of groups of crushing blades.

[0017] A further improvement is that the upper end of the outer wall of the telescopic hose is connected with the input end of the pump body through a connecting pipe, and a follower impeller driven to rotate by the incoming bottom mud is rotatably provided in the connecting pipe, the impeller shaft of the follower impeller extends to the liquid outlet end of the liquid storage tank and is sleeved with an eccentric wheel, the liquid storage tank is arranged on the hull, auxiliary agent is stored in the liquid storage tank, and the liquid outlet end of the liquid storage tank passes through the top of the telescopic hose, a valve seat is arranged in the liquid outlet end of the liquid storage tank, a valve core is fitted on the top of the valve seat, the diameter of the valve core is larger than the inner diameter of the valve seat and smaller than the outer diameter of the valve seat, a push rod is provided at the bottom of the valve core which is in sliding contact with the eccentric wheel, and an elastic reset member is provided between the valve core and the valve seat.

[0018] A further improvement is that the biological filler layer includes a plurality of ceramsite particles, each of which is provided with holes for attaching microorganisms.

[0019] A further improvement is that a hollow rod is inserted into the biological filler layer, and the two ends of the hollow rod are respectively movable through the two sides of the repair box, one end of the hollow rod extends to the air induced shell fixed on the outer wall of the repair box and is sleeved with a drainage fan blade, and the other end is connected to the output end of the rotating equipment, and ventilation holes are evenly opened on the circumferential outer wall of the hollow rod located in the biological filler layer.

[0020] A further improvement is that a stirring rod is provided in the repair box and above the biological filler layer for horizontal rotation, and one end of the stirring rod movably penetrates the repair box and is drivingly connected to the output end of the rotating device.

[0021] A further improvement is that a filtering mechanism is also provided on the connecting pipe.

[0022] A method for remediating heavy metal-contaminated river and lake sediments based on biological fillers, using the above-mentioned remediation device, comprises the following steps:

[0023] S1: The ship moves to the water area to be treated, and the roller contacts the bottom of the water area to be treated. Then the ship is controlled to move and the pump body is controlled to open. At the same time, the roller rolls, which drives the scraper to rotate. The scraper rotates to scrape the bottom mud attached to the bottom of the water. The pump body sucks the scraped bottom mud into the repair box together with the water.

[0024] S2: The sediment and water entering the remediation tank pass through the biological filler layer, which absorbs heavy metals in the sediment and water. Then the sediment and water are discharged into the water to be treated through the discharge pipe.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention is provided with a bottom mud processing part. When the hull moves and the bottom mud is extracted through the pump body, the roller contacts the bottom of the water and rolls, thereby driving the scraper to rotate. The scraper rotates to scrape the bottom mud attached to the bottom of the water, so that the bottom mud can be better extracted to the repair box for repair treatment, thereby ensuring the amount of extracted bottom mud and having a high bottom mud repair effect.

[0027] The present invention is also provided with a liquid storage tank, a follower impeller, an eccentric wheel, a push rod, a valve seat and a valve core, etc., so that the auxiliary agent in the liquid storage tank can be intermittently mixed with the bottom mud flowing in the pipe body, so as to pre-treat the bottom mud and improve the effect of the subsequent restoration of the bottom mud through the biological filler layer;

[0028] The present invention is also provided with a rotating device, a hollow rod and a drainage fan blade, so that the hollow rod can rotate in the biological filler layer for aeration, which can improve the adsorption effect of the biological filler on heavy metals in the sediment on the one hand, and can stir the biological filler without loss on the other hand, promote the uniform distribution of microorganisms, enhance the mass transfer effect, prevent the filler from being blocked and improve the treatment efficiency, and at the same time drive the stirring rod to further improve the quality of the sediment repaired by the biological filler layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the repair device of the present invention;

[0030] Figure 2 For the present invention Figure 1 Structural cross-section view;

[0031] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure A;

[0032] Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure B.

[0033] In the figure: 1. hull; 2. telescopic hose; 3. movable tube; 4. telescopic device; 5. roller; 6. scraper; 7. elastic telescopic member; 8. rotating shaft 1; 9. crushing blade; 10. elastic member; 11. protective shell; 12. repair box; 13. pump body; 14. filtering mechanism; 15. liquid storage tank; 16. biological filler layer; 17. discharge pipe; 18. rotating device; 19. hollow rod; 20. drainage fan blade; 21. connecting pipe; 22. follower impeller; 23. valve seat; 24. valve core; 25. eccentric wheel; 26. pushing rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] Please see attached Figure 1 -Attached Figure 2

[0036] A heavy metal polluted river and lake sediment repair device based on biological filler, comprising a hull 1, and also comprising:

[0037] The bottom mud treatment part includes a tube body inserted on the hull 1, two groups of rollers 5 respectively arranged at the two ends of the lower side of the tube body and used to contact the bottom of the water, and a scraper 6 arranged at the lower end of the tube body and drivingly connected to the shaft of the roller 5. The scraper 6 is used to rotate and scrape the bottom mud attached to the bottom of the water when the roller 5 rolls;

[0038] The roller 5 rolls on the bottom of the water when the hull 1 moves in the water area to be treated, and drives the scraper 6 to rub the bottom mud of the water, so that the bottom mud attached to the bottom of the water can be better extracted for repair treatment. The scraper 6 is, for example, a brush.

[0039] A repair box 12 is provided on the hull 1. A biological filler layer 16 for removing heavy metals in the bottom mud is provided in the repair box 12. A discharge pipe 17 penetrating the hull 1 is provided at the bottom of the repair box 12. A control valve is provided in the discharge pipe 17. After the heavy metals in the bottom mud are removed by the biological filler layer 16, the bottom mud can be discharged through the discharge pipe 17.

[0040] as well as,

[0041] The pump body 13 is disposed on the repair box 12 , with an input end thereof being connected to the pipe body, and the other end thereof being connected to the repair box 12 .

[0042] Please see attached Figure 3 -Attached Figure 4

[0043] Preferably, the tube body of this embodiment includes:

[0044] The telescopic hose 2 is closed at the top and fixedly inserted on the hull 1. The bottom end of the telescopic hose 2 is fixedly sleeved with a support ring, which is connected to the output end of the telescopic device 4 provided on the hull 1. The telescopic device 4 is, for example, an electric telescopic rod, which is used to adjust the position of the roller 5. It should be noted that when the device is used in a water area with a water depth of 1 meter to 10 meters, the telescopic length of the telescopic hose 2 and the telescopic device 4 is adapted to the water depth, that is, the telescopic hose 2 and the telescopic device 4 can be extended to the desired position so that the roller 5 contacts the bottom of the water.

[0045] A movable tube 3, a movable sleeve is arranged at the lower end of the telescopic hose 2 and is located below the support ring, and a roller 5 is rotatably arranged on the outer wall of the movable tube 3; and,

[0046] The elastic member 10 is sleeved on the outer wall of the telescopic hose 2, and one end of the elastic member 10 is connected to the support ring, and the other end is connected to the movable tube 3. The elastic member 10 is, for example, a spring;

[0047] The elastic member 10 and the movable tube 3 are used to allow the roller 5 to elastically move up and down so that it can roll better on the bottom of the water.

[0048] Preferably, the scraping member 6 of the present embodiment is arranged at one end of the elastic telescopic member 7, and the other end of the elastic telescopic member 7 extends into the protective shell 11. The elastic telescopic member 7 is, for example, an elastic telescopic rod. A bearing is provided at the connection between the elastic telescopic member 7 and the protective shell 11. The protective shell 11 is fixed in the movable tube 3 through a bracket. A rotating shaft 8 parallel to the shaft of the roller 5 is inserted on one side of the protective shell 11. A bearing is provided at the connection between the rotating shaft 8 and the protective shell 11. One end of the rotating shaft 8 and the end of the elastic telescopic member 7 located in the protective shell 11 are connected through a bevel gear set. The bevel gear set is There are two sets of meshing bevel gears, and the bevel gear set is located in the protective shell 11. The other end of the rotating shaft 8 is connected to the shaft of a roller 5 through a sprocket transmission set (not shown in the figure). The sprocket transmission set is a sprocket and a chain. When the roller 5 rolls, it drives the rotating shaft 8 through the shaft and the sprocket transmission set. The rotating shaft 8 drives the scraping member 6 to rotate and rub the bottom of the water through the bevel gear set, so that the bottom mud is separated from the bottom of the water and is better extracted by the tube body. At the same time, the scraping member 6 is connected with the elastic telescopic member 7, so that the scraping member 6 can move up and down elastically so that it can better contact with the bottom of the water.

[0049] Preferably, the outer wall of the elastic telescopic member 7 of this embodiment is provided with several groups of crushing blades 9, which rotate with the elastic telescopic member 7 to crush the pumped-in bottom mud, thereby improving the quality of subsequent repair on the one hand and avoiding pipeline blockage on the other hand.

[0050] Preferably, the upper end of the outer wall of the telescopic hose 2 of this embodiment is connected to the input end of the pump body 13 through a connecting pipe 21, the connecting pipe 21 and the telescopic hose 2 are perpendicular, and a follower impeller 22 driven to rotate by the entering bottom mud is provided in the connecting pipe 21. As the pump body 13 works, the bottom mud and the water body are pumped into the telescopic hose 2 together, and then enter the connecting pipe 21 to drive the follower impeller 22 to rotate; the impeller shaft of the follower impeller 22 extends to the liquid outlet end of the liquid storage tank 15 and is sleeved with an eccentric wheel 25. The liquid storage tank 15 is arranged on the hull 1, and an auxiliary agent is stored in the liquid storage tank 15 for pre-treating the bottom mud to improve the subsequent restoration quality of the bottom mud through the biological filler layer 16, and the liquid outlet end of the liquid storage tank 15 passes through the top of the telescopic hose 2;

[0051] The auxiliary agent is, for example, a coagulant, an oxidizing / reducing agent, a surfactant, etc., wherein the coagulant reduces the content of suspended matter in the sediment by promoting the aggregation and precipitation of tiny particles in the sediment, and may remove some heavy metals, such as iron salts, aluminum salts and polyacrylamide, by coprecipitation; the oxidizing / reducing agent changes the redox potential of the sediment, causing the form of certain heavy metals to change, thereby making them easier to be removed by biological fillers, such as hydrogen peroxide, potassium permanganate, sodium sulfite, and sodium sulfide; the surfactant reduces the surface tension of the particles in the sediment, improves the fluidity of the sediment, and makes it easier for heavy metals to contact with and be adsorbed by biological fillers, such as anionic surfactants, nonionic surfactants, etc. The auxiliary agent is selected according to the actual situation and is not described in detail here;

[0052] A valve seat 23 is provided in the liquid outlet end of the liquid storage tank 15, and a valve core 24 is attached to the top of the valve seat 23. The diameter of the valve core 24 is larger than the inner diameter of the valve seat 23 and smaller than the outer diameter of the valve seat 23. For example, the valve seat 23 is an annular member, and the valve core 24 is a disc-shaped member. A push rod 26 that is in sliding contact with the eccentric wheel 25 is provided at the bottom of the valve core 24. A roller can be embedded at the bottom end of the push rod 26 to slide against the circumferential outer wall of the eccentric wheel 25. An elastic reset member is provided between the valve core 24 and the valve seat 23, and the elastic reset member is, for example, a spring.

[0053] When the follower impeller 22 rotates, it drives the eccentric wheel 25 to rotate, and the eccentric wheel 25 drives the push rod 26 to drive the valve core 24 intermittently upward, so that the auxiliary agent in the liquid storage tank 15 intermittently flows downward from between the valve core 24 and the valve seat 23 and mixes with the bottom mud flowing in the pipe body, thereby pre-treating the bottom mud.

[0054] Preferably, the biological filler layer 16 of the present embodiment includes a plurality of ceramsites, each of which is provided with holes for attaching microorganisms. In the present embodiment, a plurality of ceramsites can be loaded in a frame, and the outer wall of the frame is provided with through holes having a pore size smaller than that of the ceramsite particles. When the biological filler layer 16 is located in the repair box 12, the microorganisms can attach to the holes of the ceramsite. In the present embodiment, the microorganisms can be microbial bacteria. In the present embodiment, the ceramsite can be formed into holes by crushing or by other methods, which are not limited here. The biological filler layer 16 can adsorb and filter impurities such as heavy metals and microparticles in the entering sediment and water body.

[0055] Preferably, a hollow rod 19 is horizontally inserted in the biological filler layer 16 of the present embodiment, and the two ends of the hollow rod 19 are respectively movable through the two sides of the repair box 12, and a bearing is provided at the connection between the hollow rod 19 and the repair box 12. One end of the hollow rod 19 extends to the air induction shell fixed to the outer wall of the repair box 12 and is sleeved with a drainage fan blade 20, and the other end is connected to the output end of the rotating device 18. The air inlet is provided on the air inlet, and a filtering structure can be provided in the air inlet to filter the incoming air. The rotating device 18 is, for example, a motor. Ventilation holes are evenly opened on the circumferential outer wall of the hollow rod 19 located in the biological filler layer 16;

[0056] When the rotating device 18 is working, it drives the hollow rod 19 to rotate, and the hollow rod 19 drives the drainage blades 20. The drainage blades 20 allow the external air to enter the induced draft shell and then enter the hollow rod 19, and be discharged from the vent holes on the outer wall of the hollow rod 19. On the one hand, aeration of the biological filler improves the adsorption effect of the biological filler on heavy metals in the bottom mud. On the other hand, rotary aeration can non-destructively stir the biological filler, promote uniform distribution of microorganisms, enhance mass transfer effect, prevent filler clogging and improve treatment efficiency.

[0057] Preferably, a stirring rod is provided in the repair box 12 of the present embodiment and is located above the biological filler layer 16 so as to rotate horizontally. One end of the stirring rod movably penetrates the repair box 12 and is transmission-connected to the output end of the rotating device 18. The stirring rod and the output end of the rotating device 18 can be transmission-connected by a sprocket transmission group. When the rotating device 18 is working, the stirring rod rotates at the same time to stir the incoming bottom mud and water body, thereby improving the quality of subsequent repair by the biological filler layer 16.

[0058] Preferably, the connecting pipe 21 of the present embodiment is also provided with a filtering mechanism 14, such as a sand filter or a microfiltration membrane filtering structure, etc. The filtering mechanism 14 can remove residual auxiliary agents, thereby playing a certain protective role on the biological filler layer 16 and effectively improving the removal efficiency of heavy metals.

[0059] A method for remediating heavy metal-contaminated river and lake sediments based on biological fillers, using the above-mentioned remediation device, comprises the following steps:

[0060] S1: The hull 1 moves to the water area to be treated, and the roller 5 contacts the bottom of the water area to be treated. Then the hull 1 is controlled to move, and the pump body 13 is controlled to open. At the same time, the roller 5 rolls, thereby driving the scraper 6 to rotate. The scraper 6 rotates to scrape the bottom mud attached to the bottom of the water, and the pump body 13 sucks the scraped bottom mud into the repair box 12 together with the water body;

[0061] S2: The sludge and water entering the restoration tank 12 pass through the biological filler layer 16, and the biological filler layer 16 absorbs heavy metals in the sludge and water. Then the sludge and water are discharged to the water area to be treated through the discharge pipe 17.

[0062] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heavy metal-contaminated river and lake sediment remediation device based on biological fillers, comprising a hull (1), characterized in that: Also includes: The bottom mud treatment part comprises a tube body inserted on the hull (1), two groups of rollers (5) rotatably arranged at the two ends of the lower side of the tube body and used to contact the bottom of the water, and a scraper (6) arranged at the lower end of the tube body and drivingly connected to the shaft of the roller (5), wherein the scraper (6) is used to rotate and scrape the bottom mud attached to the bottom of the water when the roller (5) rolls; A repair box (12) is arranged on the hull (1), wherein a biological filler layer (16) for removing heavy metals in the bottom mud is arranged in the repair box (12), and a discharge pipe (17) penetrating the hull (1) is arranged at the bottom of the repair box (12); and, A pump body (13) is arranged on the repair box (12), an input end of which is connected to the pipe body, and the other end of which is connected to the repair box (12); The tube body comprises: A telescopic hose (2) having a closed top and fixedly inserted on the hull (1); a support ring is fixedly sleeved on the bottom end of the telescopic hose (2); and the support ring is connected to an output end of a telescopic device (4) provided on the hull (1); A movable tube (3), the movable sleeve is arranged at the lower end of the telescopic hose (2) and is located below the support ring, and the roller (5) is rotatably arranged on the outer wall of the movable tube (3); and, An elastic member (10) is sleeved on the outer wall of the telescopic hose (2), and one end of the elastic member (10) is connected to the support ring, and the other end is connected to the movable tube (3); The scraping member (6) is arranged at one end of the elastic telescopic member (7), the other end of the elastic telescopic member (7) extends into the protective shell (11), the protective shell (11) is fixedly arranged in the movable tube (3), a rotating shaft (8) parallel to the shaft of the roller (5) is inserted into one side of the protective shell (11), one end of the rotating shaft (8) and the end of the elastic telescopic member (7) located in the protective shell (11) are connected by transmission via a bevel gear set, and the bevel gear set is located in the protective shell (11), and the other end of the rotating shaft (8) is connected by transmission via a sprocket transmission set to the shaft of a roller (5); The outer wall of the elastic telescopic member (7) is provided with a plurality of groups of crushing blades (9); The upper end of the outer wall of the telescopic hose (2) is connected to the input end of the pump body (13) through a connecting pipe (21). A follower impeller (22) driven to rotate by the incoming bottom mud is rotatably arranged in the connecting pipe (21). The impeller shaft of the follower impeller (22) extends to the liquid outlet end of the liquid storage tank (15) and is sleeved with an eccentric wheel (25). The liquid storage tank (15) is arranged on the hull (1). The liquid storage tank (15) stores an auxiliary agent, and the liquid storage tank (15) The liquid outlet end of the liquid storage tank (15) passes through the top of the telescopic hose (2); a valve seat (23) is arranged inside the liquid outlet end of the liquid storage tank (15); a valve core (24) is fitted on the top of the valve seat (23); the diameter of the valve core (24) is larger than the inner diameter of the valve seat (23) and smaller than the outer diameter of the valve seat (23); a push rod (26) is provided at the bottom of the valve core (24) and is in sliding contact with the eccentric wheel (25); and an elastic reset member is provided between the valve core (24) and the valve seat (23).

2. The repair device according to claim 1, characterized in that: The biological filler layer (16) comprises a plurality of ceramsite particles, each of which is provided with holes for attaching microorganisms.

3. The repair device according to claim 2, characterized in that: A hollow rod (19) is inserted into the biological filler layer (16), and the two ends of the hollow rod (19) are respectively movable and penetrate the two sides of the repair box (12). One end of the hollow rod (19) extends to the air induction shell fixed to the outer wall of the repair box (12) and is sleeved with a drainage fan blade (20), and the other end is connected to the output end of the rotating device (18). Ventilation holes are evenly opened on the circumferential outer wall of the hollow rod (19) located in the biological filler layer (16).

4. The repair device according to claim 3, characterized in that: A stirring rod is provided in the repair box (12) and is located above the biological filler layer (16) so as to rotate horizontally. One end of the stirring rod movably penetrates the repair box (12) and is drivingly connected to the output end of the rotating device (18).

5. The repair device according to claim 4, characterized in that: The connecting pipe (21) is also provided with a filtering mechanism (14).

6. A method for remediating heavy metal-contaminated river and lake sediments based on biological fillers, using the remediation device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: The hull (1) moves to the water area to be treated, the roller (5) contacts the bottom of the water area to be treated, and then the hull (1) is controlled to move, and the pump body (13) is controlled to open, and the roller (5) is driven to rotate, thereby driving the scraper (6) to rotate, and the scraper (6) rotates to scrape the bottom mud attached to the bottom of the water, and the pump body (13) sucks the scraped bottom mud into the repair box (12) together with the water body; S2: The sediment and water entering the remediation tank (12) pass through the biological filler layer (16), and the biological filler layer (16) adsorbs heavy metals in the sediment and water. Then, the sediment and water are discharged to the water area to be treated through the discharge pipe (17).

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