CN117164208A - River and lake substrate improvement system and improvement method - Google Patents

Abstract

The invention discloses a river and lake substrate improvement system and an improvement method, wherein the river and lake substrate improvement system comprises an operation ship, the top end of the operation ship is provided with a fixing frame, a rotating frame is rotationally connected to the fixing frame, the top end of the operation ship is provided with a steel wire roller, a mud suction pipe is rotationally connected to the operation ship, the mud suction pipe is connected with the rotating frame through steel wires, the top end of the fixing frame is fixedly connected with a crushing and screening device and a flocculation and sedimentation device, the crushing and screening device comprises a shell, the mud suction pipe is communicated with the shell through a conveying pipe, the upper part of the shell is provided with a crushing chamber, the lower part of the shell is provided with a screening chamber, the inner wall of the screening chamber is provided with an arc screen, and the arc screen is obliquely arranged. The invention overcomes the defects of the prior art, has reasonable design, is not easy to block the filter screen, and has higher social use value and application prospect.

Description

River and lake substrate improvement system and improvement method

Technical Field

The invention relates to the technical field of river and lake substrate improvement, in particular to a river and lake substrate improvement system and a river and lake substrate improvement method.

Background

With the continuous progress of society, urban rapid development is carried out, urban sewage pipeline construction is not completed, part of domestic sewage and industrial sewage are directly discharged into a river, river and lake water body is gradually converted into black and odorous water body, sediment pollutants of a substrate are gradually increased, and the problem of endogenous pollution of the substrate is increasingly serious; at present, the widely used substrate improvement technology mainly comprises dredging, in-situ repairing and the like, each technology has the advantages and the disadvantages, the existing river and lake substrate improvement is generally only carried out for the substrate sludge, and then the substrate sludge is covered to the raw water area in situ, the treatment mode ensures that the effect of repairing the substrate sludge by submerged plants is poor, a plurality of steps such as crushing, filtering, flocculating, adsorbing and the like are needed for improving the substrate sludge, however, in the process of filtering the river and lake substrate sludge, the substrate sludge at the river and lake bottom has larger and harder particle impurities, the filter screen is not completely easy to be blocked due to crushing, and the filtering efficiency of the substrate sludge is affected.

Accordingly, the inventor has the problem of providing a river and lake sediment improvement system and an improvement method for achieving the purpose of having more practical value by keeping the experience of the design development and the actual production in the related industry for many years and researching and improving the existing structure and the defects.

Disclosure of Invention

In order to solve the problem that the filter screen is easy to block in the background art, the invention provides a river and lake substrate improvement system and an improvement method.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the river and lake substrate improvement system comprises an operation ship, wherein a fixing frame is arranged at the top end of the operation ship, a rotating frame is rotationally connected to the fixing frame, a steel wire roller is arranged at the top end of the operation ship, a mud suction pipe is rotationally connected to the operation ship, the mud suction pipe is connected with the rotating frame through steel wires, and a crushing and screening device and a flocculation and sedimentation device are fixedly connected to the top end of the fixing frame;

the crushing and screening device comprises a shell, a mud suction pipe is communicated with the shell through a conveying pipe, a crushing chamber is arranged on the upper portion of the shell, a screening chamber is arranged on the lower portion of the shell, an arc screen is arranged on the inner wall of the screening chamber, the arc screen is obliquely arranged, a rotating shaft is connected to the inner wall of the screening chamber in a rotating mode, a first connecting rod is arranged on the rotating shaft, a scraping plate is arranged on the first connecting rod, a worm wheel is arranged at the side end of the rotating shaft, and a coarse grain outlet is formed in the side wall of the screening chamber.

Preferably, the crushing chamber is rotationally connected with a crushing roller, a crushing knife is arranged on the crushing roller, a first gear is fixedly arranged at the side end of the crushing roller, and a driving assembly is arranged on the side wall of the shell.

Preferably, the drive assembly comprises a sliding groove formed in the side wall of the shell, the sliding groove is connected with a sliding block in a sliding mode, a first rack is arranged on the sliding block, a second connecting rod is arranged at the top end of the sliding block, a third connecting rod is connected to the second connecting rod in a rotating mode, and a connecting frame is arranged on the side wall of the shell.

Preferably, the side wall of the shell is provided with a coarse grain collecting tank, the top end of the coarse grain collecting tank is provided with a conveying shell, the coarse grain collecting tank is rotationally connected with a second rotating shaft, and the second rotating shaft is provided with a threaded conveying blade.

Preferably, the bottom end of the coarse grain collecting tank is fixedly connected with a second motor, and the output end of the second motor is fixedly connected with a second rotating shaft.

Preferably, the gyration groove has all been seted up at operation ship four corners, and operation ship top fixedly connected with rotating turret rotates on the rotating turret to be connected with fixed sleeve, and sliding connection has the spud in the fixed sleeve, and fixed sleeve lateral wall is equipped with first cylinder, first cylinder output and spud fixed connection, and operation ship top rotates to be connected with the second cylinder, and second cylinder output rotates with fixed sleeve lateral wall to be connected.

Preferably, the flocculation precipitation device comprises a shell and a medicine tank, wherein the shell is connected to the top end of an operation ship, a first sliding rod is arranged on the top end of the shell, a first sliding frame is connected to the first sliding rod in a sliding mode, a stirring shaft is connected to the first sliding frame in a rotating mode, a second sliding frame is connected to the first sliding frame in a sliding mode, a fixing frame is arranged on the top end of the shell, a corrugated pipe is arranged on the fixing frame, a stirring shell is fixedly connected to the top end of the first sliding frame, a rotating disc is connected to the stirring shell in a rotating mode, and a medicine conveying pipe is arranged on the medicine tank.

Preferably, a third rotating shaft is arranged on the side wall of the shell, and a third connecting rod is rotatably connected to the top end of the third rotating shaft.

A method of modifying a river/lake sediment modification system, comprising the steps of:

s1: starting a first cylinder to drive the positioning pile to move upwards, starting a second cylinder to retract to drive the positioning pile to rotate, enabling the positioning pile to lie on the top end of the operation ship, and moving the operation ship to a demarcation area;

s2: rotating the rotating frame to place the mud suction pipe at a preset depth, and sucking out the sediment through the mud suction pipe;

s3: starting a first motor, and crushing the bottom mud by a crushing cutter, wherein the crushed bottom mud falls onto an arc-shaped screen in a screening chamber;

s4: the scraping plate is driven to swing in a reciprocating manner to clean the arc-shaped screen, so that the arc-shaped screen is prevented from being blocked;

s5: starting a third motor, and enabling a fourth gear to be meshed with a third rack to drive a rotating disc to rotate, so that flocculating medicine is uniformly sprayed to bottom mud in the shell from the rotating disc;

s6: due to the action of the synchronous belt, the first sliding frame is driven to slide back and forth on the first sliding rod, the stirring shaft is driven to rotate, the bottom mud is stirred, and the flocculation efficiency is improved;

s7: and discharging the flocculated river and lake sediment into an adsorption tank to remove heavy metal substances in the sediment.

Compared with the prior art, the invention has the beneficial effects that:

1. the second gear is meshed with the first rack to drive the worm to rotate, and the worm is meshed with the worm wheel to drive the rotating shaft to rotate, so that the scraper blade is driven to swing reciprocally, the arc-shaped screen is cleaned, and the arc-shaped screen is prevented from being blocked.

2. The incompletely crushed larger particles can flow to the coarse grain collecting tank, and the larger particles are transported to the crushing chamber to be crushed again through the screw conveying blades, so that the sediment can be further utilized.

3. The fourth gear is connected with the third rack meshing and drives the rolling disc to rotate, and flocculation medicine evenly spills the backing mud in to the shell from the rolling disc, and when the third pivot rotated, because the effect of hold-in range, can drive first carriage and reciprocate on first slide bar, is connected through second rack and third gear meshing and drives the (mixing) shaft and rotate, stirs the backing mud, improves flocculation efficiency.

In conclusion, the invention overcomes the defects of the prior art, has reasonable design, is not easy to block the filter screen, and has higher social use value and application prospect.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an enlarged view of the structure of FIG. 1A according to the present invention;

FIG. 3 is a schematic view of a turret according to the present invention;

FIG. 4 is a schematic view of a crushing and screening device according to the present invention;

FIG. 5 is a schematic view of the crushing chamber structure of the present invention;

FIG. 6 is a schematic view of the screening chamber structure of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6B in accordance with the present invention;

FIG. 8 is a schematic view of the coarse grain collecting tank structure of the present invention;

FIG. 9 is a schematic view of a flocculation precipitation device according to the present invention;

FIG. 10 is an enlarged view of the structure of FIG. 9C in accordance with the present invention;

FIG. 11 is a schematic view of a rotating disk structure according to the present invention;

fig. 12 is a schematic view of the stirring shaft structure of the invention.

In the figure: the vessel 1, the rotary tank 11, the rotary frame 111, the fixed sleeve 112, the spud 113, the first cylinder 114, the second cylinder 115, the fixed frame 12, the rotary frame 121, the wire roll 122, the suction pipe 124, the conveying pipe 125, the crushing and screening device 2, the housing 21, the crushing chamber 211, the crushing roller 2111, the crushing knife 2112, the first gear 2113, the screening chamber 212, the arc-shaped screen 2121, the rotating shaft 2122, the first connecting rod 2123, the scraping blade 2124, the worm wheel 2125, the coarse grain outlet 2126, the driving assembly 22, the motor frame 221, the sliding tank 222, the sliding block 223, the first rack 2231, the connecting frame 224, the worm 225, the second gear 2251, the second connecting rod 226, the third connecting rod 227, the first motor 228, the coarse grain collecting tank 24, the second rotating shaft 241, the screw conveying blade 242, the second motor 243, the flocculation and sedimentation device 3, the housing 31, the first 311, the first sliding frame 32, the stirring shaft 33, the third gear 331, the stirring blade 332, the second rack 34, the second sliding frame 35, the third connecting rod 36, the third motor 37, the third motor 371, the third rotating shaft 39, the bevel gear wheel 381, the fourth conical gear wheel 391, the fourth rotating shaft 395, the rotary drum 41, the drug delivery vessel casing 41, the rotary frame 395, the rotating drum 391, and the rotating shafts.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-12, a river and lake sediment improvement system comprises an operation ship 1, wherein the top end of the operation ship 1 is provided with a fixed frame 12, a rotating frame 121 is rotatably connected to the fixed frame 12, the top end of the operation ship 1 is provided with a steel wire roller 122, a mud suction pipe 124 is rotatably connected to the operation ship 1, the mud suction pipe 124 is connected with the rotating frame 121 through steel wires, the top end of the fixed frame 12 is provided with a crushing screening device 2 and a flocculation precipitation device 3, the crushing screening device 2 comprises a shell 21, the mud suction pipe 124 is communicated with the shell 21 through a conveying pipe 125, the upper part of the shell 21 is provided with a crushing chamber 211, the lower part of the shell 21 is provided with a screening chamber 212, the inner wall of the screening chamber 212 is provided with an arc screen 2121, the arc screen 2121 is obliquely arranged, the inner wall of the screening chamber 212 is rotatably connected with a rotating shaft 2122, the rotating shaft 2122 is provided with a first connecting rod 2123, the first connecting rod 2123 is provided with a scraper 2124, the side end of the rotating shaft 2122 is provided with a worm wheel 2125, and the side wall of the screening chamber 212 is provided with a coarse grain outlet 2126;

the crushing chamber 211 is connected with a crushing roller 2111 in a rotating way, a crushing knife 2112 is arranged on the crushing roller 2111, a first gear 2113 is fixedly arranged at the side end of the crushing roller 2111, and a driving component 22 is arranged on the side wall of the shell 21;

the driving assembly 22 comprises a sliding groove 222 formed in the side wall of the shell 21, the sliding groove 222 is connected with a sliding block 223 in a sliding mode, a first rack 2231 is arranged on the sliding block 223, a second connecting rod 226 is arranged at the top end of the sliding block 223, a third connecting rod 227 is connected onto the second connecting rod 226 in a rotating mode, the third connecting rod 227 is connected with the end face of a first gear 2113 in a rotating mode, a connecting frame 224 is arranged on the side wall of the shell 21, a worm 225 is connected onto the connecting frame 224 in a rotating mode, the worm 225 is meshed with a worm gear 2125, a second gear 2251 is arranged at the side end of the worm 225, the second gear 2251 is meshed with the first rack 2231, a motor frame 221 is arranged on the side wall of the shell 21, a first motor 228 is arranged on the motor frame 221, and the output end of the first motor 228 is fixedly connected with the first gear 2113;

rotating the rotating frame 111 to place the mud suction pipe 124 at a preset depth to suck out mud from the river and lake, conveying the mud to the crushing chamber 211 through the conveying pipe 125, starting the first motor 228, driving the first gear 2113 to rotate in an engaged manner by the first motor 228, enabling the two steel wire rollers 122 to rotate relatively, crushing the mud by the crushing knife 2112, enabling the crushed mud to fall onto the arc-shaped screen 2121 in the screening chamber 212, enabling the first gear 2113 to rotate, driving the second connecting rod 226 to rotate through the third connecting rod 227, driving the sliding block 223 to move along the sliding groove 222, driving the first rack 2231 to move, driving the worm 225 to rotate through the engagement connection of the second gear 2251 and the first rack 2231, driving the rotating shaft 2122 to rotate through the engagement connection of the worm 225 and the worm gear 2125, driving the scraper 2124 to swing reciprocally, and cleaning the arc-shaped screen 2121, and avoiding blockage of the arc-shaped screen 2121.

Example 2

Referring to fig. 1-12, the difference between this embodiment and embodiment 1 is that the sidewall of the housing 21 is provided with a coarse grain collecting tank 24, the top end of the coarse grain collecting tank 24 is provided with a conveying shell, the coarse grain collecting tank 24 is rotatably connected with a second rotating shaft 241, the second rotating shaft 241 is provided with a screw thread conveying blade 242, the bottom end of the coarse grain collecting tank 24 is fixedly connected with a second motor 243, and the output end of the second motor 243 is fixedly connected with the second rotating shaft 241;

because of the inclined arrangement of the curved screen 2121, the incompletely crushed larger particles will flow to the coarse collecting tank 24, and the larger particles are transported to the crushing chamber 211 for re-crushing by the screw conveyor 242, so that the bottom sludge can be further utilized.

Example 3

Referring to fig. 1-12, the difference between the present embodiment and embodiment 2 is that the four corners of the operation ship 1 are all provided with the rotary slots 11, the top end of the operation ship 1 is fixedly connected with the rotating frame 111, the rotating frame 111 is rotatably connected with the fixed sleeve 112, the fixed sleeve 112 is slidably connected with the positioning pile 113, the side wall of the fixed sleeve 112 is provided with the first cylinder 114, the output end of the first cylinder 114 is fixedly connected with the positioning pile 113, the top end of the operation ship 1 is rotatably connected with the second cylinder 115, and the output end of the second cylinder 115 is rotatably connected with the side wall of the fixed sleeve 112;

the operation ship 1 finishes the bottom mud improvement, the first cylinder 114 is started to drive the positioning pile 113 to move upwards, the second cylinder 115 is started to retract, the fixed sleeve 112 can be driven to rotate, and accordingly the positioning pile 113 is driven to rotate, so that the positioning pile 113 is laid on the top end of the operation ship 1, and the height of the positioning pile is lower through the low bridge Liang Handong.

Example 4

Referring to fig. 1-12, the difference between this embodiment and embodiment 3 is that flocculation precipitation device 3 includes a housing 31 and a medicine tank 4 connected to the top end of operation boat 1, the top end of housing 31 is provided with a first slide bar 311, the first slide bar 311 is slidingly connected with a first slide frame 32, the first slide frame 32 is rotatably connected with a stirring shaft 33, the stirring shaft 33 is provided with a stirring blade 332, the top end of stirring shaft 33 is fixedly connected with a third gear 331, the inner wall of housing 31 is fixedly connected with a second rack 34, the second rack 34 is meshed with the third gear 331, the first slide frame 32 is slidingly connected with a second slide frame 35, the second slide frame 35 is provided with a third rack 351, the top end of housing 31 is provided with a fixing frame 39, the fixing frame 39 is provided with a bellows 391, the top end of first slide frame 32 is fixedly connected with a stirring housing 392, the stirring housing 392 is rotatably connected with a rotating disc 394, the bottom end of the rotating disc 394 is fixedly connected with a fourth gear 395, the fourth gear 395 is meshed with the third rack 351, and medicine tank 4 is provided with a medicine delivery tube 41, and medicine delivery tube 41 is communicated with bellows 391;

the side wall of the shell 31 is provided with a third motor 38, the output end of the third motor 38 is provided with a second bevel gear 381, the side wall of the shell 31 is provided with a third rotating shaft 37, the bottom end of the third rotating shaft 37 is provided with a first bevel gear 371, the first bevel gear 371 is meshed with the second bevel gear 381, the top end of the third rotating shaft 37 is rotatably connected with a third connecting rod 36, and the third connecting rod 36 is rotatably connected with a second sliding frame 35;

the third motor 38 is started, the third rotating shaft 37 is driven to rotate through the meshing connection of the first bevel gear 371 and the second bevel gear 381, the second sliding frame 35 is driven to slide reciprocally on the first sliding frame 32, the third rack 351 is driven to slide relatively to the first sliding frame 32 while the second sliding frame 35 slides, the fourth gear 395 is meshed with the third rack 351 to drive the rotating disc 394 to rotate, flocculating medicine is uniformly sprayed to bottom mud in the shell 31 from the rotating disc 394, the first sliding frame 32 is driven to slide reciprocally on the first sliding rod 311 due to the action of the synchronous belt while the third rotating shaft 37 rotates, the stirring shaft 33 is driven to rotate through the meshing connection of the second rack 34 and the third gear 331 while the first sliding frame 32 slides reciprocally, the bottom mud is stirred, and the flocculating efficiency is improved.

A method of modifying a river/lake sediment modification system, comprising the steps of:

s1: starting the first cylinder 114 to drive the positioning pile 113 to move upwards, starting the second cylinder 115 to retract, and driving the fixed sleeve 112 to rotate, so as to drive the positioning pile 113 to rotate, and enabling the positioning pile 113 to lie on the top end of the operation ship 1 to move the operation ship 1 to a delimited area;

s2: rotating the rotating frame 111 to place the sludge suction pipe 124 at a predetermined depth, sucking out the sludge of the river and the lake, sucking out the sludge through the sludge suction pipe 124, and conveying the sludge to the crushing chamber 211 through the conveying pipe 125;

s3: starting a first motor 228, wherein the first motor 228 drives a first gear 2113 to rotate in a meshed manner, the two steel wire rollers 122 rotate relatively, a crushing knife 2112 crushes the bottom mud, and the crushed bottom mud falls onto an arc-shaped screen 2121 in the screening chamber 212;

s4: the first gear 2113 rotates to drive the second connecting rod 226 to rotate through the third connecting rod 227, so that the sliding block 223 is driven to move along the sliding groove 222, the first rack 2231 is driven to move, the worm 225 is driven to rotate through the meshing connection of the second gear 2251 and the first rack 2231, the rotating shaft 2122 is driven to rotate through the meshing connection of the worm 225 and the worm wheel 2125, the scraping plate 2124 is driven to swing back and forth, the arc-shaped screen 2121 is cleaned, and the arc-shaped screen 2121 is prevented from being blocked;

s5: starting a third motor 38, driving a third rotating shaft 37 to rotate through the meshing connection of a first bevel gear 371 and a second bevel gear 381, driving a second sliding frame 35 to slide reciprocally on a first sliding frame 32, driving a third rack 351 to slide relatively to the first sliding frame 32 while the second sliding frame 35 slides, and driving a rotating disc 394 to rotate through the meshing connection of a fourth gear 395 and the third rack 351, so that flocculated medicines are uniformly sprayed to bottom mud in a shell 31 from the rotating disc 394;

s6: when the third rotating shaft 37 rotates, the first sliding frame 32 is driven to slide on the first sliding rod 311 in a reciprocating manner under the action of the synchronous belt, and when the first sliding frame 32 slides in a reciprocating manner, the second rack 34 is meshed with the third gear 331 to drive the stirring shaft 33 to rotate, so that the sediment is stirred, and the flocculation efficiency is improved;

s7: and discharging the flocculated river and lake sediment into an adsorption tank to remove heavy metal substances in the sediment. Heavy metal adsorption in the auxiliary tank is a conventional technical means, and the invention is not repeated.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The control mode of the invention is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming of a person skilled in the art, the supply of power also belongs to common knowledge in the art, and the invention is mainly used for protecting a mechanical device, so the invention does not explain the control mode and circuit connection in detail.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (9)

1. River and lake substrate improvement system, including operation ship (1), its characterized in that: the top end of the operation ship (1) is provided with a fixing frame (12), a rotating frame (121) is rotationally connected to the fixing frame (12), a steel wire roller (122) is arranged at the top end of the operation ship (1), a mud suction pipe (124) is rotationally connected to the operation ship (1), the mud suction pipe (124) is connected with the rotating frame (121) through steel wires, and a crushing and screening device (2) and a flocculation and precipitation device (3) are arranged at the top end of the fixing frame (12);

crushing screening plant (2) include casing (21), suction dredge (124) are through conveyer pipe (125) and casing (21) intercommunication, crushing room (211) are established on casing (21) upper portion, casing (21) lower part is equipped with screening room (212), screening room (212) inner wall is equipped with arc screen cloth (2121), arc screen cloth (2121) slope sets up, screening room (212) inner wall rotation is connected with pivot (2122), be equipped with first connecting rod (2123) on pivot (2122), be equipped with scraper blade (2124) on first connecting rod (2123), pivot (2122) side is equipped with worm wheel (2125), coarse grain export (2126) have been seted up to screening room (212) lateral wall.

2. A river/lake sediment modification system as set forth in claim 1, wherein: the crushing chamber (211) is rotationally connected with a crushing roller (2111), a crushing knife (2112) is arranged on the crushing roller (2111), a first gear (2113) is fixedly arranged at the side end of the crushing roller (2111), and a driving assembly (22) is arranged on the side wall of the shell (21).

3. A river/lake sediment modification system as defined in claim 2, wherein: the driving assembly (22) comprises a sliding groove (222) formed in the side wall of the shell (21), a sliding block (223) is connected in the sliding groove (222), a first rack (2231) is arranged on the sliding block (223), a second connecting rod (226) is arranged at the top end of the sliding block (223), a third connecting rod (227) is connected to the second connecting rod (226) in a rotating mode, and a connecting frame (224) is arranged on the side wall of the shell (21).

4. A river/lake sediment modification system as set forth in claim 1, wherein: the side wall of the shell (21) is provided with a coarse grain collecting tank (24), the top end of the coarse grain collecting tank (24) is provided with a conveying shell, the coarse grain collecting tank (24) is rotationally connected with a second rotating shaft (241), and the second rotating shaft (241) is provided with a threaded conveying blade (242).

5. The river/lake sediment modification system of claim 4 wherein: the bottom end of the coarse grain collecting tank (24) is fixedly connected with a second motor (243), and the output end of the second motor (243) is fixedly connected with a second rotating shaft (241).

6. A river/lake sediment modification system as set forth in claim 1, wherein: the rotary groove (11) has all been seted up in operation ship (1) four corners, operation ship (1) top fixedly connected with rotating turret (111), rotate on rotating turret (111) and be connected with fixed sleeve (112), sliding connection has spud (113) in fixed sleeve (112), fixed sleeve (112) lateral wall is equipped with first cylinder (114), first cylinder (114) output and spud (113) fixed connection, operation ship (1) top rotation is connected with second cylinder (115), second cylinder (115) output and fixed sleeve (112) lateral wall rotate and are connected.

7. A river/lake sediment modification system as set forth in claim 1, wherein: flocculation precipitation device (3) are including connecting shell (31) and medicine jar (4) on operation ship (1) top, shell (31) top is equipped with first slide bar (311), sliding connection has first carriage (32) on first slide bar (311), first carriage (32) lower part rotation is connected with (mixing) shaft (33), sliding connection has second carriage (35) on first carriage (32), shell (31) top is equipped with mount (39), be equipped with bellows (391) on mount (39), first carriage (32) top fixedly connected with stirring casing (392), stirring casing (392) internal rotation is connected with rolling disc (394), be equipped with medicine conveying pipe (41) on medicine jar (4).

8. The river/lake sediment modification system of claim 7 wherein: the side wall of the shell (31) is provided with a third rotating shaft (37), and the top end of the third rotating shaft (37) is rotatably connected with a third connecting rod (36).

9. A method of modifying a river/lake sediment modification system as set forth in any one of claims 1 to 8, comprising the steps of:

s1: starting a first air cylinder (114) to drive a positioning pile (113) to move upwards, starting a second air cylinder (115) to retract to drive the positioning pile (113) to rotate, enabling the positioning pile (113) to lie on the top end of the operation ship (1), and moving the operation ship (1) to a demarcation area;

s2: rotating the rotating frame (111) to place the sludge suction pipe (124) at a preset depth, and sucking out the bottom sludge through the sludge suction pipe (124);

s3: starting a first motor (228), and crushing the bottom mud by a crushing cutter (2112), wherein the crushed bottom mud falls onto an arc-shaped screen (2121) in a screening chamber (212);

s4: the scraper (2124) is driven to swing back and forth, the arc-shaped screen (2121) is cleaned, and the arc-shaped screen (2121) is prevented from being blocked;

s5: starting a third motor (38), and enabling a fourth gear (395) to be meshed with a third rack (351) to drive a rotating disc (394) to rotate, so that flocculating medicine is uniformly sprayed from the rotating disc (394) to bottom mud in a shell (31);

s6: due to the action of the synchronous belt, the first sliding frame (32) is driven to slide back and forth on the first sliding rod (311), the stirring shaft (33) is driven to rotate, the bottom mud is stirred, and the flocculation efficiency is improved;

s7: and discharging the flocculated river and lake sediment into an adsorption tank to remove heavy metal substances in the sediment.