CN106120921B - System and method for cleaning sludge under water in park lake - Google Patents

Abstract

The invention discloses an underwater sludge cleaning system and method for a park lake. On both sides of the cavity, a mud storage cavity is arranged in the hull, and a drying cavity is arranged in the propulsion cavity, and the drying cavity is communicated with the mud storage cavity. The method includes: preparation for use, commissioning of the sludge removal system, sludge removal, sludge transport and sludge removal system maintenance. The invention is simple in structure and strong in practicability, not only can increase the adsorption area of silt, but also help to maintain the stability of the hull, improve the cleaning efficiency of the silt, and can effectively clean the edges and corners, thereby improving the practicability of the silt cleaning system. The use of the sludge cleaning system is simple and easy to operate, and can effectively clean the underwater sludge in the park lake without causing pollution to the park lake, thereby improving the sludge cleaning efficiency.

Description

A system and method for cleaning underwater silt in a park lake

technical field

The invention relates to a system and method for cleaning underwater sludge in a park lake.

Background technique

The park lake is a part of the natural water body. Due to its obvious difference from the river, it is also difficult to clean up the silt underwater in the park lake.

In the prior art, a dredger is generally used to clean up the underwater silt in the park lake. Although it can achieve the purpose of clearing the silt, it is easy to cause pollution to the water body of the park lake; because the bottom of the park lake is relatively complicated, the dredger cannot be used very well. The overall cleaning of the bottom is not good, and the efficiency is low. Due to the large area of the park lake, the dredger cannot handle the edges and corners of the bottom of the lake well, which has certain limitations.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a technical scheme of a park lake underwater sludge cleaning system and method in view of the shortcomings of the prior art, which can not only increase the adsorption area of the sludge, but also help to maintain the stability of the hull and improve the sludge cleaning efficiency. At the same time, it can effectively clean the edge and corner positions, which improves the practicability and flexibility of the sludge cleaning system. The use method of the sludge cleaning system is simple and easy to operate. The accumulation of silt in the corner will not pollute the park lake, which improves the efficiency of silt cleaning.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

An underwater sludge cleaning system for a park lake is characterized in that it includes a hull, a control room, a propulsion cavity and a sludge cleaning mechanism, the control room is located on the top surface of the hull, and an exhaust plate is also arranged on the top surface of the hull, and the propulsion cavity Both the hull and the sludge cleaning mechanism are located below the hull. The two sludge cleaning mechanisms are symmetrically distributed on both sides of the propulsion cavity. The hull is provided with a mud storage cavity, and the propulsion cavity is provided with a drying cavity. A motor is arranged on the top surface of the mud storage chamber, and the motor is connected with two stirring rods arranged in parallel to each other through the stirring shaft, and the two stirring rods are respectively located in the mud storage chamber and the drying chamber; the two symmetrically arranged sludge cleaning mechanisms not only It can increase the adsorption area of silt, and is conducive to maintaining the stability of the hull, improving the cleaning efficiency of the silt, and at the same time, it can effectively clean the edges and corners, which improves the practicability and flexibility of the silt cleaning system. At the same time, it can effectively send the filtered sludge into the drying chamber, remove the water in the sludge through heating and drying, reduce the weight of the sludge, and drive the stirring shaft to rotate through the motor, which in turn drives the stirring rod to stir the sludge. , increase the heating efficiency of the sludge, the steam generated during heating is output through the exhaust plate, and the gas pressure in the sludge storage chamber and the drying chamber is reduced.

Further, a solar panel is arranged above the control room, and the solar panel is connected to the top surface of the control room through a positioning rod. The solar panel can effectively realize the energy supplement of the sludge cleaning system and prevent the pollution of the park lake caused by fuel driving.

Further, a mud pump is arranged in the mud storage chamber, a drain pipe is horizontally connected to the mud pump, and a filter screen is arranged on the drain pipe located in the mud storage chamber. The guide pipe, one-way guide pipe and the drain pipe are arranged in parallel, the adsorbed sludge is filtered through the filter screen, the water is directly returned to the park lake through the drain pipe, and the sludge enters the sludge storage under the action of the arc filter screen. In the cavity, the separation efficiency of sludge and water is improved, thereby improving the cleaning efficiency of the sludge. The one-way flow pipe can discharge the moisture in the sludge, reduce the working pressure of the drying chamber, improve the drying efficiency of the sludge, and reduce the weight of the hull.

Further, the rear end of the propulsion cavity is provided with a propeller, the drying cavity is located at the front end of the propulsion cavity, and a heating plate is arranged on the inner wall of the drying cavity, and the propeller can effectively control the forward movement of the sludge cleaning system and run according to the set sailing trajectory, The heating plate can heat the sludge in the drying chamber to remove the moisture in the sludge.

Further, the sludge cleaning mechanism includes an upper fixed rod, a lower fixed rod, a telescopic rod and a mud suction device, the top of the upper fixed rod is fixedly connected to the bottom surface of the hull, and the lower fixed rod is connected to the bottom end of the upper fixed rod through the telescopic rod to suck mud. The device is fixedly connected to the end of the lower fixed rod. Through the design of the telescopic rod, the height of the suction device can be adjusted at any time according to the terrain changes at the bottom of the park lake, which enhances the flexibility of the sludge cleaning mechanism, and can effectively remove the sludge during cleaning. The suction unit is retracted.

Further, two positioning shaft sleeves parallel to each other are arranged on the inner side of the suction device, a driving shaft is rotatably connected between the two positioning shaft sleeves, and a dredging knife is evenly arranged on the driving shaft. The silt blocks are chopped to facilitate the suction of the silt into the silt storage cavity, and the removal efficiency of the silt at the bottom of the lake is improved.

Further, a filter plate is provided at the connection between the suction device and the lower fixing rod, which can effectively filter impurities with larger particle sizes such as stones, prevent stones from entering the lower fixing rod and cause blockage, and protect the suction. The role of the mud pump.

The method of using a park lake underwater sludge cleaning system as above, is characterized in that comprising the steps:

1) Preparation for use

a. First isolate the shore of the park lake with isolation boards or wooden stakes, and set up indicators;

b. Then use the global positioning remote sensing system to draw a three-dimensional effect map of the park lake, and select the model size of the silt cleaning mechanism according to the depth of the lake in the three-dimensional effect map. The excavation depth of the foundation pit is 4-7m, and the length and width of the foundation pit are 8m×8m;

c. Then transport the sludge cleaning system to the shore of the park lake, install the selected sludge cleaning mechanism on the bottom of the hull, adjust the telescopic length of the sludge cleaning mechanism, and hoist the sludge cleaning system into the park lake through a hoisting machine;

2) Trial operation of sludge cleaning system

First, adjust the angle of the solar panel to make the solar panel work. After 30 minutes, lower the mud suction device to a position 1-1.5m below the water surface through the telescopic rod, then start the mud pump and observe the size of the water flow from the tail of the drain pipe;

3) Sludge cleaning

a. Start the silt cleaning system, make the hull sail along the shore of the park lake at a speed of 0.5-2.5km/h, and take 15m × 15m as a cleaning unit area according to the set trajectory, and divide the cleaning unit area to the park. Lake for underwater silt cleaning;

b. When the sludge cleaning system cleans a cleaning unit area, first move the hull close to the starting position of the cleaning unit area, and then lower the suction device through the telescopic rod until the distance between the suction device and the sludge surface is less than 20 ～30cm, start the mud pump at the same time, so that the soft layer of mud at the port of the mud suction device is sucked, and enters the drain pipe through the lower fixing rod and the upper fixing rod, and the mud and water are separated under the action of the filter screen, and the water passes through the drainage. The pipe flows into the lake again, while the silt is trapped on the filter screen and slides into the mud storage cavity under the action of gravity, and the water contained in the silt flows into the one-way guide pipe along the filter screen when sliding;

c. After the mud pump runs for 30s, start the drive shaft on the positioning sleeve to drive the dredger to rotate, control the speed of the dredger to be 200-300r/min, and control the extension of the telescopic rod to make the suction device close For the sludge layer, the sludge is rotated and cut by the dredger, and the cut sludge is sucked from the lower fixing rod into the mud storage cavity. It falls to the working range of the dredger and continues to be crushed, which can effectively prevent the sludge from blocking the lower fixed rod, the upper fixed rod and the mud pump, and can effectively prevent the larger diameter stone particles from entering the sludge cleaning mechanism. , thus affecting the normal operation of the sludge cleaning system;

d. The sludge in the sludge storage chamber is accumulated in the drying chamber under the action of gravity. The motor drives the stirring shaft to rotate, which in turn drives the stirring rod to rotate to stir the sludge in the drying chamber and the sludge storage chamber. After heating, the evaporated water is output from the exhaust plate, which effectively reduces the weight of the sludge;

e. The silt cleaning system sails in an S shape in the cleaning unit area. When the cleaning of one cleaning unit area is completed, it enters the next cleaning unit area for silt treatment until the underwater silt in the entire park lake is cleaned;

f. When the amount of sludge in the drying chamber and the sludge storage chamber reaches 4/5 of the total volume, move the sludge treatment system to the shore, and transport the sludge to the sludge tank through the pipeline;

4) Sludge transportation

When the amount of silt in the foundation pit reaches 4/5 of the volume of the foundation pit, the silt is filled into the transport vehicle with the sludge pipeline, and transported to the set position by the transport vehicle until the underwater sludge in the entire park lake is cleaned up. Finally, the remaining sludge in the foundation pit is buried with an excavator, and solidified;

5) Maintenance of sludge cleaning system

When the underwater silt cleaning of the entire park lake is completed, move the silt cleaning system to the shore, lift the suction device from the bottom of the water to a position 2-3m from the water surface through the telescopic rod, and then start the suction device and pump at the same time. , the lower fixed rod, the upper fixed rod, the drying chamber and the mud storage chamber are washed by the water flow, so that the deposited sludge is accumulated in the drying chamber, and the sludge in the drying chamber is cleaned by manual operation, and finally the sludge is removed by the hoisting machine. The cleaning system is lifted off the lake for maintenance.

The present invention has the following beneficial effects due to the adoption of the above-mentioned technical solutions:

1. The two symmetrically arranged sludge cleaning mechanisms can not only increase the adsorption area of the sludge, but also help to maintain the stability of the hull and improve the sludge cleaning efficiency. At the same time, the edge and corner positions can be effectively cleaned, which improves the sludge cleaning system. practicality and flexibility;

2. The sludge storage chamber can increase the storage capacity of sludge, and at the same time, it can effectively send the filtered sludge into the drying chamber, and the water in the sludge can be taken out by heating and drying to reduce the weight of the sludge. The motor drives the stirring shaft to rotate, and then Drive the stirring rod to stir the sludge, increase the heating efficiency of the sludge, and the steam generated during heating is output through the exhaust plate to reduce the gas pressure in the sludge storage chamber and the drying chamber;

3. The filter plate can effectively filter impurities with larger particle size such as stones, prevent stones from entering the lower fixed rod and cause blockage, and protect the mud pump;

4. The use method of the present invention is simple to operate, not only can effectively clean the underwater silt in the park lake, prevent the accumulation of silt in the corners, but also will not pollute the park lake, and improve the cleaning efficiency of the silt.

The invention has simple structure and strong practicability, not only can increase the adsorption area of silt, but also help to maintain the stability of the hull, improve the cleaning efficiency of the silt, and can effectively clean the edge and corner positions, thereby improving the practicability of the silt cleaning system. The silt cleaning system is simple and easy to use, it can not only effectively clean the underwater silt in the park lake, prevent the accumulation of silt in the corners, but also will not pollute the park lake and improve the cleaning of the silt. efficiency.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings

Fig. 1 is a kind of structural representation of the sludge cleaning system in a park lake underwater sludge cleaning system and method of the present invention;

2 is a schematic diagram of the internal structure of the hull and the propulsion cavity in the present invention;

3 is a schematic diagram of the connection between the mud suction device and the lower fixing rod in the present invention;

Figure 4 is a flow chart of the use of the present invention.

In the picture: 1-hull; 2-control room; 3-propulsion cavity; 4-solar panel; 5-exhaust panel; 6-positioning rod; 7-upper fixing rod; 8-telescopic rod; 9-lower fixing rod ;10-mud suction device;11-mud storage chamber;12-drying chamber;13-suction pump;14-drain pipe;15-filter screen;16-one-way guide pipe;17-propeller;18-heating plate ; 19-motor; 20-stirring shaft; 21-stirring rod; 22-positioning bushing; 23-drive shaft; 24-dredge; 25-filter plate.

Detailed ways

As shown in Figures 1 to 3, it is an underwater sludge cleaning system for a park lake according to the present invention, including a hull 1, a control room 2, a propulsion cavity 3 and a sludge cleaning mechanism. The control room 2 is located on the top surface of the hull 1, and controls A solar panel 4 is arranged above the chamber 2. The solar panel 4 is connected to the top surface of the control chamber 2 through the positioning rod 6. The solar panel 4 can effectively realize the energy supplement of the sludge cleaning system, and prevent the use of fuel to drive the park lake. To cause pollution, an exhaust plate 5 is also provided on the top surface of the hull 1. The propulsion cavity 3 and the sludge cleaning mechanism are located under the hull 1. The two sludge cleaning mechanisms are symmetrically distributed on both sides of the propulsion cavity 3. The mechanism includes an upper fixed rod 7, a lower fixed rod 9, a telescopic rod 8 and a mud suction device 10. The top of the upper fixed rod 7 is fixedly connected to the bottom surface of the hull 1, and the lower fixed rod 9 is connected to the upper fixed rod 7 through the telescopic rod 8. At the bottom end, the mud suction device 10 is fixedly connected to the end of the lower fixed rod 9. Through the design of the telescopic rod 8, the height and position of the mud suction device 10 can be adjusted at any time according to the terrain changes at the bottom of the park lake, which enhances the flexibility of the use of the mud cleaning mechanism. Therefore, the mud suction device 10 can be effectively retracted during cleaning. Two positioning shaft sleeves 22 parallel to each other are arranged on the inner surface of the mud suction device 10, and a drive shaft 23 is rotatably connected between the two positioning shaft sleeves 22. , the driving shaft 23 is evenly provided with a dredger 24, through which the dredging knife 24 can effectively chop up the silt blocks, so that the silt can be sucked into the silt storage cavity 11, and the removal efficiency of the silt at the bottom of the lake can be improved. The shell can reduce the turbidity of the lake water during dredging and reduce the impact on the lake surface. A filter plate 25 is provided at the connection between the mud suction device 10 and the lower fixing rod 9, and the filter plate 25 can effectively remove large particles such as stones and the like. The impurities in the diameter are filtered to prevent the stones from entering the lower fixing rod 9 and cause blockage, and play the role of protecting the mud pump 13 .

The hull 1 is provided with a mud storage chamber 11 , a mud pump 13 is provided in the mud storage chamber 11 , a drain pipe 14 is horizontally connected to the mud pump 13 , and a filter screen 15 is provided on the drain pipe 14 in the mud storage chamber 11 . , the filter screen 15 is arc-shaped, the lower end of the filter screen 15 is connected with a one-way guide pipe 16, the one-way guide pipe 16 is arranged in parallel with the drain pipe 14, the adsorbed sludge is filtered through the filter screen 15, and the water directly passes through the drainage The pipe 14 returns to the park lake again, and the silt enters the mud storage cavity 11 under the action of the arc-shaped filter screen 15, which improves the separation efficiency of the silt and water, thereby improving the cleaning efficiency of the silt. The water in the sludge is discharged, the working pressure of the drying chamber 12 is reduced, the drying efficiency of the sludge is improved, and the weight of the hull 1 is reduced.

The propelling cavity 3 is provided with a drying cavity 12 , the drying cavity 12 is communicated with the mud storage cavity 11 , the rear end of the propelling cavity 3 is provided with a propeller 17 , the drying cavity 12 is located at the front end of the propelling cavity 3 , and the inner wall of the drying cavity 12 is There is a heating plate 18 on it, the propeller 17 can effectively control the forward movement of the sludge cleaning system, and run according to the set sailing trajectory. A motor 19 is arranged on the top surface of the silo, the motor 19 is connected with two stirring rods 21 arranged in parallel with each other through the stirring shaft 20, and the two stirring rods 21 are respectively located in the mud storage cavity 11 and the drying cavity 12; The sludge cleaning mechanism can not only increase the adsorption area of sludge, but also help to maintain the stability of the hull 1 and improve the efficiency of sludge cleaning. The sludge storage chamber 11 can increase the storage capacity of sludge, and at the same time can effectively send the filtered sludge into the drying chamber 12, remove the moisture in the sludge by heating and drying, reduce the weight of the sludge, and drive the stirring shaft 20 to rotate through the motor 19. Then, the stirring rod 21 is driven to stir the sludge to increase the heating efficiency of the sludge. The steam generated during heating is output through the exhaust plate 5 to reduce the gas pressure in the sludge storage chamber 11 and the drying chamber 12.

A method of using the above-mentioned park lake underwater sludge cleaning system (as shown in Figure 4) includes the following steps:

1) Preparation for use

a. First isolate the shore of the park lake with isolation boards or wooden stakes, and set up indicators;

b. Then use the global positioning remote sensing system to draw a three-dimensional effect map of the park lake, and select the model size of the silt cleaning mechanism according to the depth of the lake in the three-dimensional effect map. The excavation depth of the foundation pit is 4-7m, the length and width of the foundation pit are 8m×8m, and safety indication signs shall be set up around the foundation pit;

c. Then transport the sludge cleaning system to the shore of the park lake, install the selected sludge cleaning mechanism on the bottom of the hull 1, adjust the telescopic length of the sludge cleaning mechanism, and hoist the sludge cleaning system into the park lake through a hoisting machine ;

2) Trial operation of sludge cleaning system

First adjust the angular position of the solar panel 4 to make the solar panel 4 start to work. After 30 minutes, lower the mud suction device 10 through the telescopic rod 8 to a position 1 to 1.5 m below the water surface, then start the mud pump 13 and observe the drainage pipe 14. The size of the water discharged from the tail;

3) Sludge cleaning

a. Start the silt cleaning system, make the hull 1 sail along the shore of the park lake at a speed of 0.5-2.5km/h, and take 15m×15m as a cleaning unit area according to the set trajectory. Underwater silt clearing in the park lake;

b. When the sludge cleaning system cleans a cleaning unit area, first move the hull 1 close to the starting position of the cleaning unit area, and then lower the suction device 10 through the telescopic rod 8 until the suction device 10 is between the sludge surface The distance is less than 20-30cm, and the mud pump 13 is activated at the same time, so that the soft layer of mud at the port of the mud suction device 10 is sucked, and enters the drain pipe 14 through the lower fixing rod 9 and the upper fixing rod 7. The silt and water are separated, the water flows back into the lake through the drain pipe 14, and the silt is trapped on the filter screen 15, and slides into the mud storage cavity 11 under the action of gravity, and the water contained in the silt slides along the filter screen when sliding. 15 flows into the one-way guide tube 16 and flows out;

c. After the mud pump 13 runs for 30s, start the drive shaft 23 on the positioning sleeve 22 to drive the dredger 24 to rotate, control the speed of the dredger 24 to be 200-300r/min, and control the extension of the telescopic rod 8 at the same time. Make the suction device 10 close to the silt layer, and cut the silt by the dredger 24. The cut silt is sucked from the lower fixing rod 9 into the mud storage cavity 11. When the diameter of the silt is larger, the lower fixing rod 9 The upper filter plate 25 can block the sludge, and under the action of gravity, it falls to the working range of the dredger 24 and continues to be crushed, effectively preventing the sludge from blocking the lower fixing rod 9, the upper fixing rod 7 and the mud pump 13, and at the same time. It can effectively prevent large-diameter stone particles from entering the sludge cleaning mechanism, thereby affecting the normal operation of the sludge cleaning system;

d. The sludge in the mud storage chamber 11 is accumulated in the drying chamber 12 under the action of gravity, and the stirring shaft 20 is driven to rotate by the motor 19, which in turn drives the stirring rod 21 to rotate, and the sludge in the drying chamber 12 and the mud storage chamber 11 is cleaned. While stirring, the heating plate 18 heats the sludge, and the evaporated water is output from the exhaust plate 5, which effectively reduces the weight of the sludge;

e. The silt cleaning system sails in an S shape in the cleaning unit area. When the cleaning of one cleaning unit area is completed, it enters the next cleaning unit area for silt treatment until the underwater silt in the entire park lake is cleaned;

f. When the amount of sludge in the drying chamber 12 and the sludge storage chamber 11 reaches 4/5 of the total volume, move the sludge treatment system to the shore, and transport the sludge to the sludge tank through pipelines;

4) Sludge transportation

When the amount of silt in the foundation pit reaches 4/5 of the volume of the foundation pit, the silt is filled into the transport vehicle with the sludge pipeline, and transported to the set position by the transport vehicle until the underwater sludge in the entire park lake is cleaned up. Finally, the remaining sludge in the foundation pit is buried with an excavator, and solidified;

5) Maintenance of sludge cleaning system

When the underwater silt cleaning of the entire park lake is completed, move the silt cleaning system to the shore, lift the suction device 10 from the bottom of the water to a position 2 to 3m away from the water surface through the telescopic rod 8, and then start the suction device 10 and 10 at the same time. The mud pump 13 flushes the lower fixed rod 9, the upper fixed rod 7, the drying chamber 12 and the mud storage chamber 11 through water flow, so that the deposited sludge is accumulated in the drying chamber 12, and the The sludge is cleaned, and finally the sludge cleaning system is lifted off the lake surface by a hoist for maintenance.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements, or modifications made based on the present invention to achieve substantially the same technical effect are all included in the protection scope of the present invention.

Claims (1)

1. a method for a park lake underwater sludge cleaning system, is characterized in that comprising the steps: An underwater silt cleaning system for a park lake, comprising a hull, a control room, a propulsion cavity and a silt cleaning mechanism, the control room is located on the top surface of the hull, and an exhaust plate is also provided on the top surface of the hull, Both the propulsion cavity and the sludge cleaning mechanism are located below the hull, and the two sludge cleaning mechanisms are symmetrically distributed on both sides of the propulsion cavity. The hull is provided with a sludge storage cavity. A drying cavity is arranged in the propelling cavity, the drying cavity is communicated with the mud storage cavity, a motor is arranged on the top surface of the mud storage cavity, and the motor is connected with two stirring rods arranged in parallel with each other through a stirring shaft, The two stirring rods are respectively located in the mud storage cavity and the drying cavity, a solar panel is arranged above the control room, and the solar panel is connected to the top surface of the control room through the positioning rod, so A mud pump is arranged in the mud storage chamber, a drain pipe is horizontally connected to the mud pump, and a filter screen is arranged on the drain pipe located in the mud storage chamber, and the filter screen is in the shape of an arc. The lower end of the filter screen is connected with a one-way guide pipe, the one-way guide pipe is arranged in parallel with the drainage pipe, the rear end of the propulsion cavity is provided with a propeller, and the drying cavity is located in the propulsion cavity. The front end of the drying chamber is provided with a heating plate on the inner wall of the drying chamber. The sludge cleaning mechanism includes an upper fixing rod, a lower fixing rod, a telescopic rod and a suction device. The top of the upper fixing rod is fixedly connected to the hull. On the bottom surface, the lower fixed rod is connected to the bottom end of the upper fixed rod through the telescopic rod, the mud suction device is fixedly connected to the end of the lower fixed rod, and the inner surface of the mud suction device is provided with There are two positioning shaft sleeves parallel to each other, a drive shaft is rotatably connected between the two positioning shaft sleeves, and a dredger is evenly arranged on the drive shaft, and the suction device is connected with the lower fixing rod. There is a filter plate at the place; 1) Preparation for use a. First isolate the shore of the park lake with isolation boards or wooden stakes, and set up indicators; b. Then use the global positioning remote sensing system to draw a three-dimensional effect map of the park lake, and select the model size of the silt cleaning mechanism according to the depth of the lake in the three-dimensional effect map. The excavation depth of the foundation pit is 4-7m, and the length and width of the foundation pit are 8m×8m; c. Then transport the sludge cleaning system to the shore of the park lake, install the selected sludge cleaning mechanism on the bottom of the hull, adjust the telescopic length of the sludge cleaning mechanism, and hoist the sludge cleaning system into the park lake through a hoisting machine; 2) Trial operation of sludge cleaning system First, adjust the angle of the solar panel to make the solar panel work. After 30 minutes, lower the mud suction device to a position 1-1.5m below the water surface through the telescopic rod, then start the mud pump and observe the size of the water flow from the tail of the drain pipe; 3) Sludge cleaning a. Start the silt cleaning system, make the hull sail along the shore of the park lake at a speed of 0.5-2.5km/h, and take 15m × 15m as a cleaning unit area according to the set trajectory, and divide the cleaning unit area to the park. Lake for underwater silt cleaning; b. When the sludge cleaning system cleans a cleaning unit area, first move the hull close to the starting position of the cleaning unit area, and then lower the suction device through the telescopic rod until the distance between the suction device and the sludge surface is less than 20 ～30cm, start the mud pump at the same time, so that the soft layer of mud at the port of the mud suction device is sucked, and enters the drain pipe through the lower fixing rod and the upper fixing rod, and the mud and water are separated under the action of the filter screen, and the water passes through the drainage. The pipe flows into the lake again, while the silt is trapped on the filter screen and slides into the mud storage cavity under the action of gravity, and the water contained in the silt flows into the one-way guide pipe along the filter screen when sliding; c. After the mud pump runs for 30s, start the drive shaft on the positioning sleeve to drive the dredger to rotate, control the speed of the dredger to be 200-300r/min, and control the extension of the telescopic rod to make the suction device close For the silt layer, the silt is rotated and cut by the dredger, and the cut silt is sucked into the mud storage cavity from the lower fixed rod; d. The sludge in the sludge storage chamber is accumulated in the drying chamber under the action of gravity. The motor drives the stirring shaft to rotate, which in turn drives the stirring rod to rotate to stir the sludge in the drying chamber and the sludge storage chamber. Heating is carried out, and the evaporated moisture is output from the exhaust plate; e. The silt cleaning system sails in an S shape in the cleaning unit area. When the cleaning of one cleaning unit area is completed, it enters the next cleaning unit area for silt treatment until the underwater silt in the entire park lake is cleaned; f. When the amount of sludge in the drying chamber and the sludge storage chamber reaches 4/5 of the total volume, move the sludge treatment system to the shore, and transport the sludge to the sludge tank through the pipeline; 4) Sludge transportation When the amount of silt in the foundation pit reaches 4/5 of the volume of the foundation pit, the silt is filled into the transport vehicle with the sludge pipeline, and transported to the set position by the transport vehicle until the underwater sludge in the entire park lake is cleaned up. Finally, the remaining sludge in the foundation pit is buried with an excavator, and solidified; 5) Maintenance of sludge cleaning system When the underwater silt cleaning of the entire park lake is completed, move the silt cleaning system to the shore, lift the suction device from the bottom of the water to a position 2-3m from the water surface through the telescopic rod, and then start the suction device and pump at the same time. , the lower fixed rod, the upper fixed rod, the drying chamber and the mud storage chamber are washed by the water flow, so that the deposited sludge is accumulated in the drying chamber, and the sludge in the drying chamber is cleaned by manual operation, and finally the sludge is removed by the hoisting machine. The cleaning system is lifted off the lake for maintenance.

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