CN206494834U - A kind of river and lake silt processing unit - Google Patents

Abstract

The utility model discloses a river and lake sludge treatment device. The device includes a cutter suction ship, a large vibrating screen and a mud dewatering mechanism; the cutter suction ship is connected to the feed end of the large vibrating screen through a pipeline, and the sludge pool under the large vibrating screen is connected to the mud dewatering mechanism through a pipeline; the mud dewatering mechanism includes mud Sand separator (31), fully automatic stirring device (32), dynamic mixer (33), sand washing machine (34), flocculation tank (35), filter press (36) and plunger pump (37). The river and lake sludge treatment device of the utility model has the advantages of environmental protection, economy and high efficiency for automatic operation of dredging, impurity removal and dehydration.

Description

A river and lake sludge treatment device

technical field

The utility model relates to the technical field of river basin management, in particular to a river and lake sludge treatment device.

Background technique

With the rapid development of urbanization in China, a large number of black and smelly rivers and lakes urgently need to be treated. The root of black and smelly river and lake governance lies in silt control. River and lake silt has the characteristics of high hydrophilicity, high water content, high organic matter content, low permeability, large volume, and contains different levels of pollutants and garbage, which makes it difficult to deal with in the project and is prone to secondary pollution. Therefore, how to carry out standardized and systematic treatment and disposal of river and lake silt is a key problem in the treatment and restoration of black and odorous water and the control of eutrophication.

Utility model content

The utility model proposes a river and lake sludge treatment device in order to solve the above problems.

In order to achieve this purpose, the utility model adopts the following technical solutions.

A river and lake sludge treatment device, including a cutter suction ship, a large vibrating screen and a mud dewatering mechanism;

The cutter suction ship is connected to the feeding end of the large vibrating screen through a pipeline; below the discharge end of the large vibrating screen is a sludge pool, and the pipeline in the sludge pool is connected to the mud dehydration mechanism, connecting the sludge pool and the mud dehydration The pipeline of the mechanism is equipped with a vertical slurry pump;

The mud dehydration mechanism includes a mud sand separator, a fully automatic stirring device, a dynamic mixer, a sand washing machine, a flocculation tank, a filter press and a plunger pump;

The feed end of the mud sand separator is connected to the pipeline of the sludge tank; the sand outlet of the mud sand separator is connected with the feed end of the sand washing machine; the discharge end of the mud sand separator passes through the pipeline Connected to the dynamic mixer; the fully automatic stirring device is located on one side of the dynamic mixer, and the fully automatic stirring device is connected to the dynamic mixer through a pipeline; one side of the fully automatic stirring device is provided with a flocculation tank, a column Plug pump and filter press, the discharge end of the dynamic mixer is connected with the flocculation tank; the flocculation tank is connected with the plunger pump feed port, and the plunger pump discharge port is connected with the filter press feed port; the flocculation tank can be Use flocculation tank instead.

Further, the cutter suction ship includes a hull, a driving mechanism and a cutter suction mechanism;

Furthermore, the hull includes a mud tank and a living area, the living area is arranged on the deck of the hull, the mud tank is arranged inside the hull, and a pipeline connected to a large vibrating screen is arranged in the mud tank;

Furthermore, the driving mechanism is arranged on the upper part of the hull, and the driving mechanism includes a winch, a wire rope, a hanger and a pumping station;

The hoist is arranged on one side of the living area, the hoist is provided with a reel, one end of the steel wire rope is fixed around the drum, the hanger is arranged at the end of the upper part of the hull far away from the living area, and the top of the hanger is A pulley is provided, and the pulley is provided with a groove, and the other end of the wire rope passes through the groove on the pulley and is connected to the winch suction mechanism, and the pump station is located inside the hull and at the lower part of the hanger;

Furthermore, the suction suction mechanism is arranged outside the hull and below the hanger.

Furthermore, the suction cutter mechanism includes a fixed frame, a dredge pump, a dredge pipe, a reamer and a dredge discharge pipe.

One end of the fixed frame is swingably arranged on the outside of the hull through the connecting wheel, and the other end of the fixed frame is fixed and connected to the dredge pump; A round hole is provided at the connection of the mud pump, and reamers are provided on both sides of the lower end of the mud suction pipe; one end of the mud discharge pipe is connected with the dredge pump, and the other end of the mud discharge pipe is arranged in the mud cabin.

The connection between the dredging pipe and the dredging pump is provided with a flushing pipe, the flushing pipe includes a pipe body, a water inlet end and a water outlet end, the water outlet end is arranged in a round hole of the dredge pipe, and the water inlet end Connected to the hull, the port of the water inlet is provided with a high-pressure water pump; by setting a flushing pipe, the water and garbage in the cutter suction mud are flushed away, thereby improving work efficiency.

Further, the mud separator includes a frame, a screen box, a transfer box, a float device, a storage box, a cyclone, a pipeline pump and a slurry pump;

The transfer box is set at the bottom of the frame, the screen box is set at the top of the transfer box, the discharge end of the screen box is provided with a gravel discharge port, and one end of the transfer box is provided with a slurry pump. The slurry outlet end of the slurry pump is connected to one end of the cyclone, and the cyclone is connected to the interior of the storage tank through a pipeline, and the storage tank is provided with a first branch pipeline and a second branch pipeline, the first branch pipeline communicates with the float device, and the second branch pipeline communicates with the pipeline pump.

The floating ball device is mainly used to replenish the slurry in the transfer tank, so that the liquid level can be kept at a certain height, avoiding the lack of slurry and causing the slurry pump to evacuate and frequently start and stop, prolong the service life of the pump, and improve work efficiency.

Further, the fully automatic stirring device includes a stirring barrel, a stirring motor, a stirring shaft, a stirring blade, a feed end and a discharge end;

The stirring shaft is arranged on the center line of the stirring barrel, one end of the stirring shaft is connected with the stirring motor through a coupling, the other end of the stirring shaft extends vertically to the inside of the stirring barrel, and one end of the stirring blade is installed on the On the stirring shaft, the other end of the stirring blade extends outward, the feeding end is arranged above the stirring barrel, and the discharging end is arranged below the stirring barrel.

Further, the sand washing machine is a wheel-bucket sand washing machine, and the sand washing machine includes a sand washing box, an impeller, a flywheel and a motor;

The impeller is set in the sand washing box and partially exposed on the upper part of the sand washing box, and the impeller does not contact the bottom of the sand washing box; the flywheel is fixed inside the impeller and rotates coaxially with the impeller, and the motor is located on One side of the flywheel, the output end of the motor is connected with the flywheel through a transmission belt and rotates synchronously.

Further, the dynamic mixer includes a driving motor, a mandrel, a delivery pipe, a mixer frame, a stirring blade, a feed pipe and a discharge pipe;

The driving motor and the conveying pipe are arranged on the mixer frame, the mandrel is arranged through the conveying pipe, the driving motor drives the mandrel to rotate, and the two ends of the conveying pipe are respectively provided with inlets perpendicular to the conveying pipe. The feed pipe and the discharge pipe, the feed pipe is connected with the discharge end of the automatic stirring device and the discharge end of the mud sand separator through the pipeline, and the feed pipe is connected with the discharge end of the mud sand separator. A pipeline pump is provided, and a screw pump or a diaphragm pump is provided on the pipeline between the feed pipe and the discharge end of the automatic stirring device; the discharge pipe communicates with the flocculation tank.

Further, an online flow-density detection system is also provided. The online flow-density detection system includes a flow-density meter and a PLC control system. Between the pipes connected to the mixer, the flow-density meter is connected with the PLC control system.

The river and lake sludge treatment method based on the device described in any one of the above, comprising the steps:

(1) Use excavators and grabbers to dig out the blocked cofferdams in the river and dredge the river;

(2) The reamer on the cutter suction ship cuts and stirs the river bottom soil layer to loosen the river bottom soil; the centrifugal mud pump on the ship applies high-pressure suction to lift the mud to the large vibrating screen, and the large vibrating screen will Garbage, branches, weeds, entanglements, and large stones larger than 15mm in the river are screened out, and the screened sludge falls directly into the sludge pool under the large vibrating screen;

(3) The silt in the silt tank is sent to the mud sand separator through the vertical pump, and the sand above 0.4mm is screened out, and the sand washing machine cleans the sand screened out by the mud sand separator;

When the sand washing machine is working, the motor drives the flywheel to rotate through the transmission belt, and the flywheel drives the impeller to rotate, and then the sand and stone roll under the drive of the impeller and grind each other to remove impurities covering the surface of the sand and stone, and at the same time destroy the coated sand. To facilitate dehydration, add water when the impeller is working to form a strong water flow, take away impurities and foreign objects with small specific gravity in time, and finally complete the cleaning work;

(4) Dosing the corresponding treatment chemicals according to the detection of river surges, stirring the water and chemicals with a fully automatic stirring device, fully mixing and stirring, and then ready to use;

The fully automatic stirring device uses the cycloidal needle as the driving force to drive the stirring blades to fully mix and stir the medicine and water; in addition, a screw pump is set up, which is used to send the medicine liquid and to return the impact medicine liquid, so that the water flow in the barrel appears The turbulent flow state intensifies the mixing effect of the liquid in the tank, improves the dissolution and diffusion level of the solid drug, saves stirring time, speeds up the dissolution rate of the drug, and achieves the effect of rapid dissolution. The stirring time is 15-30 minutes;

(5) Use the pipeline pump to pump the silt screened by the mud separator to the feed end of the dynamic mixer, and at the same time, pump the stirred agent to the feed end of the dynamic mixer through the screw pump. Through the online monitoring and control system to detect the flow and density, the dynamic mixer fully mixes and flocculates the sludge and chemicals, and then pumps them into the mud pool;

When working, the driving motor in the dynamic mixer provides power to increase the mixing degree. By setting the stirring blades in the conveying pipe, the medicine in the mixer can be continuously and evenly contacted with the sludge particles, which effectively increases the interaction between the medicine particles and the colloidal particles. Bridging and adsorption can fully improve the mixing and flocculation effect; at the same time, the dynamic mixer can give full play to its advantages in the equipment with limited pipeline length, the mixing and flocculation effect is good, the length of the flocculation mixing tube can be shortened, the mixing reaction can be accelerated, and the flocculation can be improved. efficiency;

(6) Turn on the hydraulically driven pump to pump the sludge in the flocculation tank after reacting with the chemical agent to the filter press, and start the filter press dehydration treatment, and the filter press mud cake is sent to the dregs disposal site through the conveyor;

(7) The sand and gravel cleaned by the sand washing machine are also piled into the dump site and pulled away by truck to meet the mixed landfill standard or transfer market;

The mud separator uses the vibrating motor installed on the screen box at an angle of 45° to the horizontal screen surface as the vibration source. The excitation forces in the direction of the axis of the vibration motor cancel each other out, and the excitation forces in the direction perpendicular to the axis of the vibration motor are superimposed into a resultant force and transmitted to the entire screen surface, so that the materials on the screen surface move toward the discharge port. The material smaller than the sieve hole falls to the lower layer through the sieve hole, and flows out through the discharge port after continuous jumping. Due to the reasonable screening process, the purpose of screening and grading the material through the mud sand separator can be achieved. ; The moisture content of the sand after being processed by the mud sand separator is ≤30%, which can be directly transported abroad;

(8) The water filtered by the filter press is clear, and the water quality is tested. If it reaches the second-level standard of the urban sewage treatment plant, it will be discharged back into the river; if it does not meet the standard, it will be treated and then discharged into the river. .

Compared with the prior art, the utility model has the following advantages and beneficial effects:

The utility model has simple structure and convenient assembly. The ingenious design of the river and lake sludge processing device can process river and lake sludge, realize dredging, impurity removal, and dehydration automatic operation, and has the advantages of environmental protection, economy and high efficiency.

Description of drawings

Fig. 1 is the flow chart of the utility model river and lake sludge processing method;

Fig. 2 is the structural representation of the mud dewatering mechanism in the river and lake sludge treatment device of the utility model;

Fig. 3 is the structural representation of the cutter suction ship in the river and lake sludge treatment device of the utility model;

Fig. 4 is the structural representation of the mud sand separator in the river and lake sludge treatment device of the utility model;

Fig. 5 is the structural representation of the mud sand separator in the river and lake sludge treatment device of the utility model;

Fig. 6 is the schematic structural view of the fully automatic stirring device in the river and lake sludge treatment device of the present invention;

Fig. 7 is the schematic structural view of the sand washing machine in the river and lake sludge treatment device of the present invention;

Fig. 8 is a structural schematic diagram of the dynamic mixer in the river and lake sludge treatment device of the present invention.

detailed description

The utility model will be further elaborated below in conjunction with the accompanying drawings and embodiments, but the utility model is not limited to the following embodiments.

The utility model relates to a river and lake sludge treatment device, which comprises a cutter suction boat, a large vibrating screen and a mud dewatering mechanism;

The cutter suction ship is connected to the feed end of the large vibrating screen through pipelines; the sludge tank is located below the discharge end of the large vibrating screen, and the pipeline in the sludge tank is connected to the mud dewatering mechanism. The pipeline connecting the sludge tank and the mud dewatering mechanism is provided with Vertical slurry pump;

The structural diagram of the mud dehydration mechanism is shown in Figure 2, including a mud separator 31, a fully automatic stirring device 32, a dynamic mixer 33, a sand washing machine 34, a flocculation tank 35, a filter press 36 and a plunger pump 37;

The feed end of the mud sand separator 31 is connected to the pipeline of the sludge tank; the sand outlet of the mud sand separator 31 is connected with the feed end of the sand washing machine 34; the discharge end of the mud sand separator 31 is Be connected to dynamic mixer 33 by pipeline; Described automatic stirring device 32 is located at a side of dynamic mixer 33, and described fully automatic stirring device 32 is connected with dynamic mixer 33 by pipeline; Described automatic stirring device 32 One side is equipped with a flocculation tank 35, a plunger pump 37 and a filter press 36, and the discharge end of the dynamic mixer 33 is connected to the flocculation tank (35); the flocculation tank is connected to the feed port of the plunger pump 37, and the plunger pump 37 The discharge port is connected to the feed port of the filter press 36; the flocculation tank 35 can be replaced by a flocculation tank.

The schematic diagram of the structure of the cutter suction ship is shown in Figure 3, including the hull 11, the driving mechanism and the cutter suction mechanism;

The hull 11 includes a mud tank 111 and a living area 112, the living area 112 is located on the deck of the hull 11, the mud tank 111 is located inside the hull 11, and a pipeline connecting a large vibrating screen is provided in the mud tank 111;

The driving mechanism is located on the upper part of the hull 11, and the driving mechanism includes a winch 121, a wire rope 122, a hanger 123 and a pumping station 124;

The winch 121 is located on one side of the living area, the winch 121 is provided with a reel 1211, one end of the wire rope 122 is fixed around the reel 1211, the hanger 123 is located at the end of the hull 11 top away from the living area 112, the top of the hanger 123 A pulley 1231 is provided, and the pulley 1231 is provided with a groove. The other end of the wire rope 122 passes through the groove on the pulley and is connected to the suction mechanism. The pump station 124 is located inside the hull 11 and is located at the bottom of the hanger 123;

The winch suction mechanism is located outside the hull 11 and below the hanger 123;

The cutter suction mechanism includes a fixed frame 131, a dredge pump 132, a dredge pipe 133, a reamer 134 and a mud discharge pipe 135;

One end of the fixed mount 131 is swingably arranged on the outside of the hull 11 by the connecting wheel, and the other end of the fixed mount 131 is fixed and connected to the dredge pump 132; The joint that the upper end communicates with the dredging pump 132 is provided with a round hole, and the both sides of the lower end of the dredging pipe 133 are provided with a reamer 134; set in the mud tank 111;

The junction of the dredging pipe 133 and the dredging pump 132 is provided with a flushing pipe 136, and the flushing pipe 136 includes a pipe body, a water inlet end and a water outlet end. On the hull 11, a high-pressure water pump is provided at the port of the water inlet;

The schematic diagram of the structure of the mud separator 31 is shown in Figure 4 and Figure 5, including a frame 311, a screen box 312, a transfer box 313, a float device, a storage box 314, a cyclone 315, a pipeline pump and a slurry pump ;

The transfer box 313 is located at the bottom of the frame 311, and the screen box 312 is located at the top of the transfer box 313. The discharge end of the screen box 312 is provided with a slag discharge port, and one end of the transfer box 313 is provided with a slurry pump. The slurry outlet end of the slurry pump is connected to one end of the cyclone 315, and the cyclone 315 is connected to the inside of the material storage box 314 through a pipeline. The material storage box 314 is provided with a first branch pipeline and a second branch pipeline. A branch pipeline communicates with the float device, and a second branch pipeline communicates with the pipeline pump;

The schematic diagram of the structure of the fully automatic stirring device 32 is shown in Figure 6, including a stirring barrel 321, a stirring motor 322, a stirring shaft 323, a stirring blade 324, a feed end 325 and a discharge end 326;

The stirring shaft 323 is arranged on the center line of the stirring barrel 321, one end of the stirring shaft 323 is connected with the stirring motor 322 through a shaft coupling, the other end of the stirring shaft 323 extends vertically to the inside of the stirring barrel 321, and one end of the stirring blade 324 is installed on the stirring On the shaft, the other end of the mixing blade extends outwards, the feeding end 325 is arranged above the mixing barrel 321, and the discharging end 326 is arranged under the mixing barrel 321;

The sand washing machine is a wheel-bucket sand washing machine, the structural diagram of which is shown in Figure 7, including a sand washing box 341, an impeller 342, a flywheel 343 and a motor;

The impeller 342 is located in the sand washing box 341 and partially exposed on the top of the sand washing box 341, and the impeller 342 is not in contact with the bottom of the sand washing box 341; the flywheel 343 is fixed inside the impeller 342 and rotates coaxially with the impeller 342, and the motor Located on one side of the flywheel 343, the output end of the motor is connected to the flywheel 343 through a transmission belt and rotates synchronously;

The structural representation of dynamic mixer 33 is as shown in Figure 8, comprises drive motor 331, mandrel 332, delivery pipe 333, mixer frame 334, feed pipe 335 and discharge pipe 336;

The driving motor 331 and the conveying pipe 333 are arranged on the mixer frame 334, the mandrel 332 penetrates and is arranged in the conveying pipe 333, the driving motor 331 drives the mandrel 332 to rotate, and the two ends of the conveying pipe 333 are respectively provided with The feed pipe 335 and the discharge pipe 336 of the feed pipe 335 are communicated with the discharge end 326 of the automatic stirring device 32 and the discharge end of the mud sand separator 31 through pipelines, and the feed pipe 335 is connected with the mud sand separator 31 A pipeline pump is provided on the pipeline at the discharge end, and a screw pump or a diaphragm pump is provided on the pipeline of the discharge end 326 of the feed pipe 335 and the fully automatic stirring device 32;

An online flow-density detection system is also provided, and the online flow-density detection system includes a flow-density meter and a PLC control system. The flow-density meter is arranged on the pipeline connected to the pipeline pump at the discharge end of the mud sand separator 31 and the dynamic mixer 33 Between, the flow-density meter is connected with the PLC control system.

Example 1

The construction requirements of the Jinji Keng Chung Regulation Project in Jiujiang Town: The length of the river is 1200 meters, the excavation of blocked cofferdams and dredging, sludge treatment (concentration, dehydration, dosing, deodorization, anti-virus), sludge solidification, and sludge treatment tail water up to standard processing etc.

The above-mentioned device is used for river and lake sludge treatment, and the treatment flow chart is shown in Figure 1, including the following steps:

(1) Use excavators and grabbers to dig out the blocked cofferdams in the river and dredge the river;

(2) The reamer 134 on the cutter suction ship cuts and stirs the river bottom soil layer to loosen the river bottom soil; applies high-pressure suction through the centrifugal mud pump on the ship to lift the mud to the large vibrating screen, and the large vibrating screen Sieve out the garbage, branches, weeds, entanglements, and large stones larger than 15mm in the river, and the sieved silt will directly fall into the silt pool under the large vibrating screen;

(3) The silt in the silt tank is sent to the mud sand separator 31 through the vertical pump, and the sand above 0.4mm is screened out, and the sand washing machine cleans the sand screened out by the mud sand separator ;

(4) Dosing the corresponding treatment agent according to the river surge detection situation, using the automatic stirring device 32 to stir the water and the agent, fully mixing and stirring for 15 minutes;

(5) Use a pipeline pump to pump the silt screened by the mud separator 31 to the feed end of the dynamic mixer 33, and at the same time pump the stirred medicament to the feed end of the dynamic mixer 33 through the diaphragm pump. At the feed end, the flow rate and density are controlled by the online monitoring and control system, and the dynamic mixer 33 fully mixes and flocculates the sludge and chemicals, and then pumps them into the mud pool 35;

(6) Turn on the hydraulically driven pump to pump the sludge in the mud pool 35 after reacting with the chemical agent to the filter press 36, and start the filter press dehydration treatment, and the filter press mud cake is sent to the dregs disposal site through the conveyor;

(7) The sand and gravel screened out by the sand separator are also piled up in the dump site and pulled away by truck to meet the standard of mixed landfill;

(8) The water filtered by the filter press is clear, and the water quality is tested to meet the second-level standard of the urban sewage treatment plant, and it is directly discharged back into the river.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (7)

1. A river and lake sludge treatment device is characterized in that it comprises a cutter suction ship, a large vibrating screen and a mud dewatering mechanism; The cutter suction ship is connected to the feeding end of the large vibrating screen through a pipeline; below the discharge end of the large vibrating screen is a sludge pool, and the pipeline in the sludge pool is connected to the mud dehydration mechanism, connecting the sludge pool and the mud dehydration The pipeline of the mechanism is equipped with a vertical slurry pump; The mud dewatering mechanism includes a mud sand separator (31), a fully automatic stirring device (32), a dynamic mixer (33), a sand washing machine (34), a flocculation tank (35), a filter press (36) and a column plug pump (37); The feed end of the mud sand separator (31) is connected to the pipeline of the sludge tank; the sand outlet of the mud sand separator (31) is connected to the feed end of the sand washing machine (34); the mud The discharge end of the sand separator (31) is connected to the dynamic mixer (33) through a pipeline; It is connected with the dynamic mixer (33) through a pipeline; one side of the automatic stirring device (32) is provided with a flocculation tank (35), a plunger pump (37) and a filter press (36), and the dynamic mixer (33 ) is connected to the flocculation tank (35); the flocculation tank is connected to the feed port of the plunger pump (37), and the discharge port of the plunger pump (37) is connected to the feed port of the filter press (36); the The flocculation tank (35) can be replaced by a flocculation tank. 2. A river and lake sludge treatment device according to claim 1, characterized in that, the cutter suction ship includes a hull (11), a driving mechanism and a cutter suction mechanism; The hull (11) includes a mud tank (111) and a living area (112), the living area (112) is set on the deck of the hull (11), and the mud tank (111) is set on the deck of the hull (11) Inside, the mud tank (111) is provided with a pipeline connected to the large vibrating screen; The driving mechanism is arranged on the upper part of the hull (11), and the driving mechanism includes a hoist (121), a wire rope (122), a hanger (123) and a pumping station (124); The hoist (121) is located on one side of the living area, the hoist (121) is provided with a drum (1211), one end of the steel wire rope (122) is fixed around the drum (1211), and the hanger ( 123) Set at the upper end of the hull (11) away from the living area (112), the top of the hanger (123) is provided with a pulley (1231), and the pulley (1231) is provided with a groove, and the wire rope (122) The other end of the pump passes through the groove on the pulley and is connected to the winch suction mechanism. The pump station (124) is located inside the hull (11) and is located at the lower part of the hanger (123); The suction suction mechanism is arranged outside the hull (11) and below the hanger (123); The cutter suction mechanism includes a fixed frame (131), a dredge pump (132), a dredge pipe (133), a reamer (134) and a mud discharge pipe (135); One end of the fixed frame (131) is swingably arranged on the outside of the hull (11) through the connecting wheel, and the other end of the fixed frame (131) is fixed and connected to the dredge pump (132); the dredge pipe (133) The upper end of the dredging pipe (132) is connected with the dredging pump (132), the connection between the upper end of the dredging pipe (133) and the dredging pump (132) is provided with a round hole, and the two sides of the lower end of the dredging pipe (133) are provided with reamers (134); one end of the mud discharge pipe (135) is communicated with the dredge pump (132), and the other end of the mud discharge pipe (135) is arranged in the mud cabin (111); A flushing pipe (136) is provided at the connection between the dredging pipe (133) and the dredging pump (132), and the flushing pipe (136) includes a pipe body, a water inlet end and a water outlet end, and the water outlet end is located at The round hole of the dredge pipe (133), the water inlet end is connected to the hull (11), and the port of the water inlet end is provided with a high-pressure water pump. 3. A river and lake sludge treatment device according to claim 1, characterized in that, the mud separator (31) includes a frame (311), a screen box (312), a transfer box (313), a floating Ball device, storage tank (314), cyclone (315), pipeline pump and slurry pump; The transfer box (313) is set at the bottom of the frame (311), the screen box (312) is set at the upper part of the transfer box (313), and the discharge end of the screen box (312) is provided with a gravel bottom One end of the transfer box (313) is provided with a slurry pump, and the slurry outlet end of the slurry pump is connected to one end of the cyclone (315), and the cyclone (315) is connected to The interior of the material storage box (314) is connected by a pipeline, and the material storage box (314) is provided with a first branch pipeline and a second branch pipeline, the first branch pipeline communicates with the floating ball device, and the second branch pipeline communicates with the floating ball device. The branch pipeline communicates with the pipeline pump. 4. A river and lake sludge treatment device according to claim 1, characterized in that, the fully automatic stirring device (32) includes a stirring barrel (321), a stirring motor (322), a stirring shaft (323), a stirring blade (324), feed end (325) and discharge end (326); The stirring shaft (323) is set on the centerline of the stirring barrel (321), one end of the stirring shaft (323) is connected to the stirring motor (322) through a coupling, and the other end of the stirring shaft (323) Extend vertically to the inside of the mixing barrel (321), one end of the stirring blade (324) is installed on the stirring shaft (323), the other end of the stirring blade (324) extends outward, and the feeding end ( 325) is arranged above the mixing barrel (321), and the discharge end (326) is arranged below the mixing barrel (321). 5. A river and lake sludge treatment device according to claim 1, characterized in that, the sand washing machine is a wheel-bucket sand washing machine, and the sand washing machine includes a sand washing box (341), an impeller (342 ), flywheel (343) and electric motor; The impeller (342) is set in the sand washing box (341) and partly exposed on the upper part of the sand washing box (341), and the impeller (342) is not in contact with the bottom of the sand washing box (341); the flywheel (343 ) is fixed inside the impeller (342) and rotates coaxially with the impeller (342), the motor is located on one side of the flywheel (343), and the output end of the motor is connected to the flywheel (343) through a transmission belt and rotates synchronously . 6. A river and lake sludge treatment device according to claim 1, characterized in that, the dynamic mixer (33) includes a driving motor (331), a spindle (332), a delivery pipe (333), a mixer Frame (334), mixing blade, feed pipe (335) and discharge pipe (336); The driving motor (331) and the conveying pipe (333) are arranged on the mixer frame (334), the mandrel (332) is arranged through the conveying pipe (333), and the driving motor (331) drives the mandrel The shaft (332) rotates, and the two ends of the delivery pipe (333) are respectively provided with a feed pipe (335) and a discharge pipe (336) perpendicular to the delivery pipe (333), and the feed pipe (335) and The discharge end (326) of the fully automatic stirring device (32) is connected with the discharge end of the mud sand separator (31) through a pipeline, and the feed pipe (335) is connected with the discharge end of the mud sand separator (31). A pipeline pump is provided on the pipeline, and a screw pump or a diaphragm pump is provided on the pipeline between the feed pipe (335) and the discharge end (326) of the fully automatic stirring device (32); the discharge pipe (336) and the The flocculation tank (35) is connected. 7. A kind of river and lake sludge processing device according to claim 1, is characterized in that, also is provided with on-line flow-density detection system, and described on-line flow-density detection system comprises flow-density meter and PLC control system, so The flow-density meter is arranged between the pipeline pump at the discharge end of the mud separator (31) and the pipeline connected to the dynamic mixer (33), and the flow-density meter is connected to the PLC control system.