WO2018032829A1

WO2018032829A1 - Desilting basin and silt separation system for treating polluted sediment of river and lake mouth

Info

Publication number: WO2018032829A1
Application number: PCT/CN2017/084961
Authority: WO
Inventors: 刘学武; 赵新民; 林忠成; 赵明江; 卢弛江; 施明
Original assignee: 中电建水环境治理技术有限公司
Priority date: 2016-08-16
Filing date: 2017-05-18
Publication date: 2018-02-22
Also published as: CN106215470B; CN106215470A

Abstract

A desilting basin and silt separation system for treating polluted sediment of river and lake mouth. The system comprises: a multi-stage desilting basin (10), wherein a spillweir (11) between two adjacent stages is provided with an inclined surface. The desilting basin (10) of every stage is provided with at least one sedimentation tank (12) and at least one sediment collection pit (13). The sedimentation tank (12) is extended along the flow direction of a sediment sludge. The sediment collection pit (13) and the sedimentation tank (12) are provided in an alternating arrangement. The invention further comprises a sediment treatment apparatus (20). A sediment inlet of the sediment treatment apparatus (20) is situated within the sediment collection pit. The sediment treatment apparatus (20) comprises a sediment washing device (21). Sediment first undergoes sediment washing and treatment performed by the sediment washing device (21) and is then discharged through a sediment outlet of the sediment treatment apparatus (20). A technical solution provided in the present invention can be applied to address an issue of the prior art caused by difficulties in effective separation of sand from mud and in performing more thorough cleaning and treatment.

Description

Sediment treatment system for sedimentation and sedimentation in rivers and lakes

[0001] The present application relates to the technical field of water conservancy engineering, and in particular, to a sedimentation tank and a sediment separation system for treating sediments in rivers and lakes.

Background technique

[0002] In the process of water conservancy treatment of polluted waters, since the sediment in the polluted waters is mixed with a lot of garbage, in order to clean the garbage in the water, it is necessary to pump the sediment to separate the garbage. The bottom mud slurry pumped up contains sand, mud and garbage. The ultimate goal of the cleaning is to separate the three, clean the sand, mud and garbage separately, and then sand and mud after cleaning. Garbage is recycled and reused. However, since the sediment in the sediment slurry is uniformly mixed after being stirred and pumped, and the soil in the mud becomes suspended particles in the mud, after the separation of the garbage in the sediment slurry is completed in the prior art, It is difficult to effectively separate the sand and mud and carry out more in-depth cleaning treatment. The sediment slurry can not be completely cleaned and discharged into the river, which makes it impossible to completely control the water environment, water quality and flood control function in the polluted waters. .

technical problem

[0003] The purpose of the present application is to provide a sedimentation tank and sediment separation system for polluting sediments in rivers and lakes, which aims to solve the problem that it is difficult to effectively separate sand and mud and perform deeper cleaning treatment in the prior art. Problem

Problem solution

Technical solution

[0004] In order to solve the above technical problem, the technical solution is: providing a sedimentation tank and sediment separation system for polluting sediments of rivers and lakes, including: a multi-stage sedimentation tank, the multi-stage sedimentation tank having a sediment slurry Inlet and mud outlet, the sediment slurry inlet is used to input the sediment mud from which the garbage is removed, and there is an overflow weir between the adjacent two stages, the weir has an inclined surface, and each level of the sedimentation tank is provided with at least one sink. In the sand trough, at least one sand collecting pit is arranged in each level of the sedimentation tank, the sedimentation trough extends along the flow direction of the sediment mud, the sand collecting pit and the sedimentation tank intersect, and the inclined surface of the sand pit and the overflow weir are collected. The bottom ends are connected, and the sand pits are collected in the sediment slurry. Sand, and the mud after sedimentation of sand is output from the mud outlet; the sand treatment equipment, the sand input end of the sand treatment equipment is located in the sand trap, wherein the sand treatment equipment includes a sand washing device, and the sand is washed by the sand washing device After the sand is processed by the sand discharge device.

[0005] Optionally, the first end of the sedimentation tank is connected to the bottom of the sediment slurry, and the second end of the sedimentation tank is connected to the sand collecting pit, and the bottom of the sedimentation tank is higher than the bottom of the sand collecting pit. The two side walls of the sedimentation tank are inclined plane walls, and a sand scraping device is arranged along the extending direction of the sedimentation tank, and the sand scraping device scrapes the sand in the sedimentation tank into the sand collecting pit.

[0006] Optionally, the sand scraping device comprises: a sand scraping drive mechanism, the sand scraping drive mechanism is disposed at the second end of the sand sinking groove and located above the sand collecting pit; the driven sprocket, the driven sprocket is disposed at At the first end of the sedimentation tank; two mounting chains, the two mounting chains are spaced apart and arranged in parallel on the driving sprocket and the driven sprocket of the sand driving mechanism; a plurality of sanding plates, a plurality of sanding The two ends of the plate are respectively connected to the two mounting chains. During the sanding operation, the bottom of each of the sanding plates is in contact with the bottom surface of the sanding trough.

[0007] Optionally, each of the sand board comprises a sand blocking section and a supporting section, and the sand blocking section is connected with the supporting section, and the contour shape of the cross section of the sand scraping board along the extending direction of the sand sinking groove is L-shaped, and the sand blocking section is The two ends are respectively connected to the two mounting chains, and during the sanding operation, the supporting section is in contact with the bottom surface of the sanding trough.

[0008] Optionally, a plurality of pressure water jets are spaced apart from each other at the top of the inclined planar walls on both sides of the sedimentation tank, and each of the pressure water jets sprays water toward the wall surface of the inclined planar wall to wash the sand.

[0009] Optionally, the sand processing device further includes a sand lifting device, wherein the sand receiving end of the sand lifting device extends into the sand collecting pit, the sand washing device comprises a sand bucket, and the sand discharging end of the sand lifting device is located above the sand bucket.

[0010] Optionally, the sand washing device further comprises a sand washing drive mechanism, a sand washing bucket wheel and a plurality of flushing water guns, the sand washing driving mechanism is connected with the sand washing bucket wheel, and the sand washing bucket wheel is located in the sand bucket, and the plurality of The flushing water gun is set opposite to the sand washing wheel.

[0011] Optionally, the sand washing device further comprises a water outlet structure, and the water outlet structure comprises a water outlet pipeline, and the water outlet pipeline is connected with the sand bucket to discharge the sewage of the sand bucket.

[0012] Optionally, the sand lifting device comprises a sand driving mechanism, a sand driving chain and a plurality of sand lifting buckets, the sand driving mechanism is connected with the sand driving chain, and the plurality of sand lifting buckets are fixed in the sand driving chain. On the corresponding link, two adjacent sand buckets are arranged at intervals, wherein each sand trap comprises a sand board, a water outlet board and two opposite side panels, a sand board, a water outlet board and two opposite sets. The side plates form an accommodation space, the sand board is a flat straight plate, and the water outlet plate is a curved panel with a water outlet hole. [0013] Optionally, the angle between the inclined surface of the weir and the horizontal plane is α, 0°≤α<42°.

Advantageous effects of the invention

Beneficial effect

[0014] The present application is particularly suitable for the large-scale centralized treatment of polluted sediments in rivers and lakes, and has high treatment efficiency and large processing capacity for contaminated sediment in polluted waters, and is in the process of treating the water environment of polluted waters. It can separate and treat the sediment in the sediment mud after being seriously polluted, so as to re-use sand for building development and improve economic benefits.

Brief description of the drawing

DRAWINGS

1 is a top plan view showing an embodiment of a river basin urgency sludge treatment sedimentation tank and sediment separation system of the present application;

2 is a cross-sectional structural view of the Α-Α of FIG. 1;

3 is a cross-sectional structural view of the Β-Β of FIG. 1;

4 is a cross-sectional structural view showing a sand board of an embodiment of a river lake urgency sewage sediment treatment sedimentation tank and a sediment separation system of the present application;

[0019] FIG. 5 is a front view showing the structure of a sand hopper of an embodiment of a river lake urgency sewage sediment treatment sedimentation tank and a sediment separation system of the present application;

6 is a cross-sectional structural view of the C-C of FIG. 5;

[0021] FIG. 7 is a front view showing the structure of a sand washing device of an embodiment of a river lake urgency sewage sediment treatment sedimentation tank and a sediment separation system of the present application;

8 is a left side view of FIG. 7.

[0023] In the drawings:

[0024] 10, sedimentation tank; 11, overflow weir; 12, sedimentation tank; 13, sand trap; 14, sand scraping device;

[0025] 20, sand treatment equipment; 21, sand washing device; 22, sand lifting device; 23, water outlet pipeline;

[0026] 143, the installation of the chain; 144, sand board; 1441, sand blocking section; 1442, support section;

[0027] 121, pressure water nozzle; 211, sand bucket; 212, sand washing drive mechanism; 213, sand washing bucket wheel;

[0028] 214, washing water gun; 221, lift drive mechanism; 222, sand drive chain; 223, sand bucket; [0029] 2231, shoveling sand; 2232, water board; 2233, side panels; 215, block Board; 100, conveyor belt. Embodiments of the invention

[0030] In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

[0031] It is to be noted that when an element is referred to as being "fixed" or "in" another element, it can be directly on the other element or indirectly. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should also be noted that the left, right, upper, lower, and the like orientations in this embodiment are merely relative concepts or reference to the normal use state of the product, and should not be considered as having limitations. Sexual.

[0033] Explanation:

[0034] (1) The directions of the arrows in Figs. 1 and 2 indicate the flow direction of the slurry.

[0035] (2) The direction of the arrow in Fig. 8 indicates the direction of rotation of the sand washing wheel 213.

[0036] As shown in FIG. 1 to FIG. 3, the sedimentation system for sedimentation and sedimentation of the river and lake sediments in the present embodiment includes a multi-stage sedimentation tank 10 and a sediment treatment device 20, and a multi-stage sedimentation tank. 10 has a slurry mud inlet and a mud outlet, the sediment mud inlet is used to input the sediment mud which is removed from the garbage, and there is an overflow raft 1 between the adjacent two stages. The overflow raft 11 has an inclined surface, and each stage sinks At least one sedimentation tank 12 is disposed in the sand pool, and at least one sand trap 13 is disposed in each sedimentation tank, the sedimentation tank 12 extends along the flow direction of the sediment mud, and the sand trap 13 intersects the sedimentation tank 12 The sand trap 13 is connected to the bottom end of the inclined surface of the weir 11 , and the sand trap 13 collects the sand precipitated in the sediment mud, and the mud slurry after the sand is discharged is output from the mud outlet, and the sand treatment device 20 The sand input end is located in the sand trap 13 , wherein the sand treatment device 20 includes a sand washing device 21 , and the sand is discharged by the sand washing device 21 and then discharged from the sand discharging end of the sand processing device 20 .

[0037] The sediment slurry is staged and settled in the sedimentation tank 12 by providing an overflow weir 11 in the sedimentation tank 10, and then the sand is concentrated in the sand collecting pit 13 and the inclination of the weir 11 is applied. The flowing sediment slurry is decelerated so that the sand is deposited on the inclined surface and slides down the inclined surface into the sand collecting pit 13 by its own gravity, and then the sand is raised from the sand collecting pit 13 by the sediment processing device 20. Sand is washed in the sand washing device 21, and the sand discharged after the sand washing treatment is cleaned to meet the environmental requirements of the building sand. Applying the technical solution of the present application in the process of treating the hydrological environment of polluted waters It can separate and treat the sediment in the sediment mud from the heavily polluted rivers and lakes, and re-use the sand for construction and improve economic benefits.

[0038] According to the actual production capacity in the factory and according to the actual area that the sedimentation tank can actually occupy, the area of the sedimentation tank can be designed to be large enough, so that in each stage of the sedimentation tank, two, three, The four sedimentation tanks 12 and the like may also be provided with a plurality of sand collecting pits 13 and correspondingly disposed with the sand processing equipment 20 to sand the sand accordingly.

[0039] In the sedimentation tank 10 of the embodiment, the first end of the sedimentation tank 12 is connected to the sediment inlet of the sediment, and after the sediment slurry is sorted and separated by the grid machine, the bottom of the garbage is removed. Mud slurry enters the sedimentation tank 10 from the sediment slurry inlet. The second end of the sedimentation tank 12 is connected to the sand collecting pit 13, and the extending direction of the sand collecting pit 13 is perpendicular to the extending direction of the sedimentation tank 12, thus forming a first stage sedimentation tank. In the first stage sedimentation tank, during the continuous flow of mud, the mud reaches the inclined surface of the overflow weir 11 and the flow velocity of the mud is buffered by the overflow weir 11 so that the sand in the mud is under the action of its own gravity. After the sedimentation, the sand sinks on the inclined surface of the weir 11, and the sand directly slides down the slope into the sand trap 13 under the action of its own gravity and buoyancy. In the present embodiment, the angle between the inclined surface of the weir 11 and the horizontal plane is α, 0° ≤ α < 42°, preferably, = 10°, = 15°, α = 20°, = 25°. , =30°, =35°, α=40° or α=42°. The inclined surface of the overflow weir 11 in the multistage grit chamber 10 can both decelerate the mud flow rate and prevent the mud from forming stagnant water at the bottom of the weir 11 so that the inclined angle of the inclined surface of the weir 11 is not suitable. Too large, optimized between 35° and 42°, it can both decelerate the mud to precipitate sand and prevent the bottom of the weir 11 from forming stagnant water. The two side walls of the sedimentation tank 12 are inclined plane walls, and the application of the inclined plane wall is more favorable for the sand after the settlement to slide into the sedimentation tank 12, and the sand scraping device 14 is arranged along the extending direction of the sedimentation tank 12, and the sand scraping is provided. The device 14 scrapes the sand in the sedimentation tank 12 into the sand collecting pit 13 so as to collect the settled sand in the sand collecting pit 13 and then lift the sand for cleaning.

[0040] The surface of the sand settled in the sediment slurry is fine sand having a considerable viscosity, and after the sedimentation, due to its own viscosity, it can adhere to the inclined plane wall of the sedimentation tank to cause sand accumulation. In order to prevent the occurrence of sand accumulation, the tops of the inclined plane walls on both sides of the sedimentation tank 12 are spaced apart from each other with a plurality of pressure water nozzles 121, and each of the pressure water nozzles 121 sprays water toward the wall surface of the inclined plane wall to wash the sand. Thereby, the sand accumulated on the inclined plane wall is washed down to the bottom of the sedimentation tank 12 [0041] Preferably, each of the pressure water nozzles 121 may be fixedly mounted at a top position of the inclined plane wall of the sedimentation tank 12, and then the pressure water nozzle 121 sprays the sand accumulated on the opposite inclined plane wall with the pressure water column, or The pressure water jet head 121 sprays the accumulated sand of the inclined plane wall on the side where the pressure water column is located. Specifically, each of the pressure water spray heads 121 can be installed through a nozzle mount, which includes a fixed support frame, a swinging rod and a rocking power structure, wherein the fixed support frame is fixed at the top position of the inclined plane wall of the sand sinking groove 12. One end of the swinging rod is movably connected to the fixed mounting seat, and the rocking power structure is drivingly coupled with the rocking rod to drive the rocking rod to reciprocate in a range of angular regions, thereby driving the pressure water jet head 121 to swingly spray to expand Scrap the area of the area of the inclined plane wall. In this embodiment, the oscillating power structure includes a motor and a transmission portion, and the motor drives the rocking rod to reciprocate through the transmission portion.

[0042] The transmission portion for driving the pressure water jet head 121 of the present embodiment may be an existing transmission structure such as the swing transmission structure of the electric fan, or may be driven by gear meshing. The transmission portion is configured by gear meshing, and the transmission portion includes a first sector gear, a second sector gear, a driving gear and a driven gear, wherein the driven gear is provided with a connecting shaft for synchronously driving the second sector gear, the first sector The gear, the driving gear and the output shaft of the motor rotate synchronously, the driving gear meshes with the driven gear, and the first sector gear tooth and the second sector gear tooth respectively correspond to the corresponding meshing teeth, the first sector gear and the first gear The two-sector gears are differently moved to reciprocate the swinging bar, so that the pressure water jet nozzle 21 performs the oscillating jet flushing.

[0043] After the sand in the sediment slurry settles in the sedimentation tank 12, in order to effectively concentrate the sand into the sand collecting pit 13, the sand in the sedimentation tank 12 is collected by the sand scraping device 14. The sand scraping device 14 of the embodiment includes a sand scraping drive mechanism, a driven sprocket, two mounting chains 143 and a plurality of sand scraping plates 144. The sand scraping drive mechanism is disposed at the second end of the sand sinking groove 12 and is located at the set. Above the bunker 13, the driven sprocket is disposed at the first end of the sand sinking groove 12, and the two mounting chains 143 are circumferentially and parallelly disposed on the driving sprocket and the driven sprocket of the sand driving mechanism, The two ends of the sand 144 are respectively connected to the two mounting chains 143. During the sanding operation, the bottom of each of the sand absorbing plates 144 is in contact with the bottom surface of the sanding tank 12.

[0044] As shown in FIG. 1, FIG. 2 and FIG. 4, in order to make the effect of sand scraping better, it is ensured that the same sand that completely collects the sand in the sedimentation tank 12 also ensures the service life of the sand board 144 is prolonged, so , each of the sand board 144 includes sand blocking The section 1441 and the support section 1442, the sand blocking section 1441 is connected to the supporting section 1442, and the cross-sectional shape of the scraping plate 144 along the extending direction of the sand sinking groove 12 is L-shaped, and the two ends of the sand blocking section 1441 are respectively installed with two. On the chain 143, during the sanding operation, the support section 1442 is in contact with the bottom surface of the sand sinking groove 12 (i.e., the support section 1442 is the bottom of the sanding plate 144). Thus, during the sanding process of the sand board 144, the support section 1442 can form a reverse pushing force on the sand blocking section 1441, so that the sand surface of the sand blocking section 1441 can always maintain a vertical state to fully scrape sand.

[0045] The sand scraping device 14 in the process of sanding the settled sand, the same mud is also stirred, so that the fine particles of the mud suspended in the water can not settle, so that the mud continues to flow with the flow of the mud In the next process, the sand is not heavy due to its own gravity, and will not be lifted during the sand scraping process of the sand scraping device 14, but suspended in the water and taken to the next process.

[0046] Referring to FIG. 3, FIG. 5 and FIG. 6, before the sand washing in the sand pool 13 which is settled and concentrated, the process is to raise the sand from the sand collecting pit 13 to the sand washing device. Within 21. In the sand-drawing process, the sand-sand processing apparatus 20 of the present embodiment further includes a sand-drawing device 22, and the sand-removing end of the sand-lifting device 22 extends into the sand collecting pit 13, and the sand-washing device 21 includes a sand bucket 211, and a sand-drawing device The sand outlet end of 22 is located above the sand bucket 211. Specifically, the sand lifting device 22 includes a sand driving mechanism 221, a sand driving chain 222 and a plurality of sand lifting buckets 223. The sand driving mechanism 221 is drivingly connected with the sand driving chain 222, and the plurality of sand lifting buckets 223 are fixed. On the corresponding links of the sand drive chain 222, two adjacent sand hoppers 223 are spaced apart, wherein each sand hopper 223 includes a sand shovel 2231, a water outlet plate 2232, and two opposite side plates 2233, a sand shovel 2231, the water outlet plate 2232 and the opposite two side plates 2233 form an accommodation space, the sand board 2231 is a flat straight plate, and the water outlet plate 2232 is a curved panel with a water outlet hole. In the process of lifting the sand, the sand drive chain 222 is driven by the sand driving mechanism 221 in the direction of the squirting needle, so that the sand hopper 223 is driven to carry out the sand lifting. The Tisha drive chain 222 moves the sand hopper 223 to reach the sand trap 13 吋, the sand shovel 2231 clings to the sand in the sand trap 13 , and after the moving sand shovel 2231 mixes the sand and undergoes sedimentation treatment The muddy water is shoveled into the accommodating space, and the sand hopper 223 gradually rises upwards as the tidal drive chain 222 continues to rise. Thereafter, the muddy water is filtered out from the water outlet of the water outlet plate 2232. When the sand hopper 223 rises to the top and the top corner bends, the vent of the accommodating space gradually faces downward, and the sand in the accommodating space is poured out and dropped into the sand washing device 21 for further sand washing operation.

[0047] As shown in FIGS. 7 and 8, the sand washing device 21 further includes a sand washing drive mechanism 212, a sand washing wheel 213, and a plurality of punches. The washing water gun 214, the sand in the sand hopper 223 is dumped into the sand bucket 211, the sand washing drive mechanism 212 is drivingly connected with the sand washing bucket wheel 213, the sand washing bucket wheel 213 is located in the sand bucket 211, and the sand washing drive mechanism 212 drives the washing. The sand bucket wheel 2 13 rotates counterclockwise, and a sand bucket is arranged in the circumferential direction of the sand washing bucket wheel 213. The sand washing bucket wheel 213 continuously shovel, stir and sand the sand bucket during the continuous rotation process. Washing. A plurality of flushing water guns 214 are disposed opposite to the sand washing bucket wheel 213, so that the sand is further washed by the pressurized water sprayed by the flushing water gun 214 during the scooping of the sand to filter the sand. The sand that has been panned and rinsed is transferred to the conveyor belt 100 and transported by the conveyor belt 100 to the yard for stacking and storage.

[0048] Moreover, the sand-increasing drive mechanism 221 of the present embodiment includes a variable frequency motor and a frequency converter, and controls the output power of the variable frequency motor by operating the frequency converter to change the sand-lifting rate of the sand-drawing device 22. In addition, the sand washing driving mechanism 212 of the sand washing device 21 of the embodiment includes a variable frequency motor and a frequency converter, and controls the output power of the variable frequency motor by operating the frequency converter to change the sand washing rate of the sand washing device 21. . Further, by changing the input flow rate of the sediment slurry, combined with changing the sedimentation rate and the sand washing rate, the river and lake sedimentary sediment treatment sedimentation tank and sediment separation system can meet various capacity demands. More widely used.

[0049] After the sand is washed and rinsed in the sand washing device 21, the sewage after being washed and washed has a large amount of mud having a very small particle size, and the mud is sufficiently mixed with water, and the sand is in the hopper 211. After the water has been washed for a while, the amount of mud in the water is increasing. Therefore, it is necessary to replace the water with a large amount of mud with the new panning water. Therefore, the sand washing device 21 also includes the water discharging structure, and the water discharging structure includes The water outlet pipe 23, the water outlet pipe 23 communicates with the sand bucket 211 to discharge the sewage of the sand bucket 211.

The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application are included in the present application. Within the scope of protection.

Claims

Claim

[Claim 1] A sedimentation system for sedimentation ponds and sediments in a river and lake filthy sediment, characterized in that it comprises:

a multi-stage sedimentation tank (10), the multi-stage sedimentation tank (10) has a sediment mud inlet and a mud outlet, and the sediment mud inlet is used to input the sediment mud from which the garbage is removed, and the adjacent two stages There is an overflow weir (11), the weir (11) has an inclined surface, and at least one sedimentation tank (12) is arranged in each level of the sedimentation tank, and at least one set is set in each level of the sedimentation tank. a sand pit (13), the sedimentation tank (12) extends along a flow direction of the sediment mud, and the sand collecting pit (13) is disposed to intersect with the sedimentation tank (12), and the sand collecting pit (13) ) is connected to the bottom end of the inclined surface of the weir (11), the sand collecting pit (13) collects the sand precipitated in the sediment slurry, and the mud after the sedimentation of the sand is output from the mud outlet; The sand inputting end of the sanding treatment device (20) is located in the sand collecting pit (13), wherein the sand processing device (20) comprises a sand washing device (21), sand The sand washing device (21) is discharged from the sand discharging end of the sediment processing device (20) after the sand washing treatment.

[Claim 2] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 1, wherein the first end of the sedimentation tank (12) and the sediment mud The second end of the sedimentation tank (12) is in contact with the sand collecting pit (13), and the bottom of the sand tank (12) is higher than the sand collecting pit (13) a bottom wall, the two side walls of the sand sinking groove (12) are inclined plane walls, and a sand scraping device (14) is disposed along the extending direction of the sand sinking groove (12), and the sand scraping device (14) Sand in the sedimentation tank (12) is scraped into the sand trap (13).

[Claim 3] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 2, wherein the sand scraping device (14) comprises:

a sand driving mechanism, the sand driving mechanism is disposed at a second end of the sand sinking groove (12) and located above the sand collecting hole (13);

a driven sprocket, the driven sprocket is disposed at a first end of the sanding trough (12); two mounting chains (143), two of the mounting chains (143) are spaced apart and arranged in parallel On the driving sprocket of the sanding drive mechanism and the driven sprocket;

a plurality of sandblasting plates (144), two ends of the plurality of sanding plates (144) are respectively connected to the two mounting chains (143), and each of the sanding plates during the sanding operation ( The bottom of the 144) is in contact with the bottom surface of the sedimentation tank (12).

[Claim 4] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 3, wherein each of the sand board (144) includes a sand blocking section (1441) and a support a section (1 442), the sand blocking section (1441) is connected to the supporting section (1442), and a contour shape of the cross section of the sand board (144) along the extending direction of the sand sinking groove (12) is L-shaped, both ends of the sand-retaining section (1441) and the two mounting chains (143) are respectively, during the sand-scraping operation, the supporting section (1442) and the sand-sinking tank (12) The bottom surface is in contact.

[Claim 5] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 2, wherein the top of the inclined plane wall on both sides of the sedimentation tank (12) is spaced apart A plurality of pressure water jets (121) are provided, and each of the pressure water jets (121) sprays water toward the wall surface of the inclined planar wall to wash the sand.

[Claim 6] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 1, wherein the sediment treatment device (20) further comprises a sand lifting device (22). The sand-removing end of the sand-drawing device (22) extends into the sand collecting pit (13), the sand washing device (21) includes a sand bucket (211), and the sand-drawing device (22) The end is located above the sand bucket (211).

[Claim 7] The river lake rushing sediment treatment sedimentation tank and sediment separation system according to claim 6, wherein the sand washing device (21) further comprises a sand washing driving mechanism (212), a sand washing wheel (213) and a plurality of flushing water guns (214), wherein the sand washing driving mechanism (212) is drivingly connected to the sand washing wheel (213), wherein the sand washing wheel (213) is located In the sand bucket (211), a plurality of the flushing water guns (214) are disposed opposite to the sand washing bucket wheel (213).

[Claim 8] The river lake rushing sediment treatment sedimentation tank and sediment separation system according to claim 7, wherein the sand washing device (21) further comprises an effluent structure, and the effluent structure package A water supply pipe (23) is connected, and the water discharge pipe (23) communicates with the sand bucket (211) to discharge the sewage of the sand bucket (211).

[Claim 9] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 6, wherein the sand lifting device (22) comprises a sand driving mechanism (221), a sand drive chain (222) and a plurality of sand hoppers (223), the sand drive mechanism (221) is drivingly coupled to the sand drive chain (222), and the plurality of sand hoppers (223) are fixed at Two corresponding sand hoppers (223) are spaced apart from each other on the corresponding links of the sand drive chain (222), wherein each of the sand hoppers (223) includes a sand shovel (2231) and water outlet board

(2232) and two opposite side plates (2233), the sand board (2231), the water outlet plate (2232) and the two opposite side plates (2233) form an accommodation space, The sand board (2231) is a flat straight board, and the water board (2232) is a curved panel with a water outlet hole.

[Claim 10] The river lake gushing sediment treatment sedimentation tank and sediment separation system according to claim 1, wherein an angle between the inclined surface of the weir (11) and the horizontal plane is Is α, 0 0 ≤ α < 42 ⁰ .