Double-dam-body synergistic effect barrage cleaning mechanism and silt and floating object removing method

Abstract

The invention relates to a barrage cleaning mechanism with a double-dam-body synergistic effect and a silt and floating object removing method. The barrage structure comprises a main dam body, an auxiliary dam body and a plurality of channels, the channels are connected through specific overflow ports, partitions and the like to form a complex water flow path, and the barrage structure is provided with structures such as a floating cable, a separating screen and a sludge tank. During treatment, the main dam body and the auxiliary dam body are normally closed, river water passes through the first channel, the I-shaped steel blocks large stone particles, the floating rope blocks garbage floating objects, gravel enters a subsequent channel through the overflow port, sludge is deposited in the sludge groove of the fourth channel, and primary separation is completed. The main dam body is opened, river water carrying impurities enters the treatment area, garbage floating objects and stone particles are separated in the fifth channel, gravel with different particle sizes is screened in the sixth channel, the seventh channel and the eighth channel, and sludge is deposited in the sludge groove in the eighth channel. After separation, the main dam body is closed, the auxiliary dam body is opened, river water is completely discharged, and sundries are collected and recycled. According to the method, three-stage screening of gravel and separated treatment of garbage and stone particles are achieved, and the silt and floating object treatment efficiency and the resource recovery rate are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water conservancy projects, and particularly relates to a river-blocking dam structure with the cooperative action of a double dam body and a method for treating sediment and floating objects. Background Art

[0002] Traditional river-blocking dam structures are mostly single dam bodies, and rely on mechanical dredging equipment to remove sediment, having the following problems:

[0003] The cleaning efficiency is low and the effect is not good, resulting in sediment deposition in front of the dam body and raising the riverbed;

[0004] It is impossible to synchronously treat gravel, sludge and garbage floating objects with different particle sizes;

[0005] For the garbage floating objects on the river surface, manual salvage is relied on, with low efficiency;

[0006] The dredging equipment has high energy consumption and complex maintenance.

[0007] In summary, in the design of river-blocking dam structures using the natural force of water flow in the prior art, most are limited to single functions (such as sediment discharge or sewage interception), lacking an integrated double-dam body solution for grading and recycling sediment and mechanically treating garbage floating objects at the same time.

[0008] The above information disclosed in the above background art section is only used to enhance the understanding of the background art of the technology described in this article. Therefore, the background art may contain certain information that is not known prior art to those skilled in the art. Summary of the Invention

[0009] Aiming at the technical problems of the traditional river-blocking dam, such as low dredging efficiency, manual dependence on floating object treatment, poor sediment resource utilization rate, high system operation energy consumption and insufficient functional expandability, the present invention proposes a river-blocking dam structure with the cooperative action of a double dam body and a method for treating sediment and floating objects.

[0010] The technical solution adopted by the present invention is as follows:

[0011] A river-blocking dam structure with the cooperative action of a double dam body includes a main dam body and a secondary dam body. The upstream end of the main dam body is a separation area for initially separating garbage floating objects, stone particles, gravel and sludge. Between the main dam body and the secondary dam body is a treatment area for grading and settling gravel with different particle sizes and separating garbage floating objects and stone particles.

[0012] A number of partitions parallel to the river channel are arranged in the treatment area, dividing the treatment area into fifth, sixth, seventh and eighth channels parallel to each other in the same direction.

[0013] An I-beam is provided at the bottom of the fifth channel, and the setting direction of the I-beam is parallel to the river direction; a floating cable is arranged on the water surface, and one end of the floating cable is fixedly arranged on the main dam body; a floating object treatment channel is also connected to the end of the fifth channel, and a floating object collection pool is connected to the end of the floating object treatment channel.

[0014] In the sixth channel, the seventh channel and the eighth channel, separation screens with different pore sizes are sequentially arranged, and the pore sizes of the separation screens increase sequentially along the water flow direction, and correspondingly, a primary sedimentation chamber, a secondary sedimentation chamber and a tertiary sedimentation chamber are formed in the sixth channel, the seventh channel and the eighth channel.

[0015] A number of partitions parallel to the river are arranged in the separation area, dividing the separation area into the first channel, the second channel, the third channel and the fourth channel which are parallel in the same direction; the first channel and the fifth channel are on the same axis, the second channel and the sixth channel are on the same axis, the third channel and the seventh channel are on the same axis, and the first channel and the eighth channel are on the same axis.

[0016] An I-beam is provided at the bottom of the first channel, and the setting direction of the I-beam is parallel to the river direction; a floating cable is arranged on the water surface, and one end of the floating cable is fixedly arranged on the main dam body.

[0017] The left side of the first channel is the water inlet, and the left side of the fourth channel is the water outlet; an overflow port is arranged in the middle of the partition between the first channel and the second channel, overflow ports are arranged on the left and right sides of the partition between the second channel and the third channel, and an overflow port is arranged on the right side of the partition between the third channel and the fourth channel.

[0018] Sludge tanks are arranged at the lower parts of the fourth channel and the eighth channel.

[0019] The bottoms of the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the sixth channel, the seventh channel and the eighth channel are inclined planes, and the direction of the inclined planes is high at the top and low at the bottom; and a stepped structure is formed between adjacent channels.

[0020] A method for removing sediment and floating objects is realized based on the above-mentioned river dam structure, and the specific process includes:

[0021] Step: Pre-separation in the normally closed state

[0022] The main dam body and the auxiliary dam body are kept closed, and the river water enters the separation area through the water inlet of the first channel;

[0023] The I-beam barrier intercepts large-particle stones, and the floating cable intercepts floating objects;

[0024] Gravel enters the second channel through the overflow port, the water flow is shunted to the third and fourth channels through the S-shaped channel, and the sludge is deposited in the sludge tank of the fourth channel under the action of the inclined plane;

[0025] Steps: Hierarchical treatment after the main dam is opened

[0026] The main dam is opened, and the river water carries the pre-separated mixture into the treatment area;

[0027] Separation of floating objects and stone particles: In the fifth channel, the floating objects are guided by the floating cable to the floating object collection pool, and the stone particles settle to the bottom;

[0028] Three-stage screening of sand and gravel: In the sixth, seventh, and eighth channels, sand and gravel with small, medium, and large particle sizes are settled in sequence through sieves with different pore sizes;

[0029] Sedimentation of sludge: The sludge tank in the eighth channel collects the sludge that settles by gravity;

[0030] Steps: Resource recovery after the secondary dam is opened

[0031] After the separation is completed, the main dam is closed, the secondary dam is opened, and the river water in the treatment area is drained;

[0032] The remaining large-sized stone particles, classified sand and gravel, sludge, and floating objects are sorted and recycled through special equipment to achieve resource utilization.

[0033] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0034] Efficient primary separation: When the main dam and the secondary dam are normally closed, the river water flows through multiple channels. Through structures such as I-beams, floating cables, and overflow ports, large particle stone particles, garbage floating objects, sand and gravel, and sludge are initially separated in the separation area; using partitions to form an S-shaped channel to extend the water flow path, enabling more sand and gravel and sludge to stay in the separation area and improving the primary separation effect.

[0035] Fine treatment: After the main dam is opened, the river water carries sundries into the treatment area. The garbage floating objects and stone particles enter the fifth channel, the stone particles sink to the bottom, and the floating objects are guided by the floating cable to the floating object collection pool; sand and gravel with different particle sizes settle on the bottom of the sixth, seventh, and eighth channels in sequence under the action of separation sieves with different diameters; the sludge deposits in the sludge tank of the eighth channel, realizing three-stage screening of sand and gravel, screening sand and gravel with small, medium, and large particle sizes, facilitating subsequent recycling, and simultaneously separately treating garbage and stone particles.

[0036] Convenient for recycling: After the separation is completed, the main dam is closed and the secondary dam is opened, draining the river water in the treatment area, and the sundries are left behind, facilitating collection and recycling using relevant equipment. Description of the Drawings

[0037] The present invention will be described by way of examples and with reference to the accompanying drawings, where:

[0038] Figure 1 is a schematic structural diagram of the integrated river dam structure in the present invention;

[0039] Figure 2 This is a schematic cross-sectional view of the separation area in the present invention. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all of them. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0041] Embodiment 1

[0042] This embodiment provides an integrated double-dam synergistic action barrage structure. As shown in combination with Figure 1 、 Figure 2 , this system consists of a main dam 1 and a secondary dam 2 to form a double-dam structure. Through functional zoning and optimized design of the flow channel, hierarchical treatment of sediment in the river channel, mechanical recovery of floating objects and resource utilization are realized. The specific structure and function division are as follows:

[0043] It includes a main dam 1 and a secondary dam 2. The upstream end of the main dam 1 is a separation area 3. The separation area 3 serves as a pretreatment unit. Through physical barrier and flow channel design, the river water entering the dam is preliminarily separated from garbage floating objects, large-sized stone particles, sand and gravel, and sludge.

[0044] The area between the main dam 1 and the secondary dam 2 is a treatment area 4. The treatment area 4 performs hierarchical sedimentation of sand and gravel and classification and recovery of floating objects and stone particles on the pre-separated mixture through a multi-stage sedimentation channel and a separation device.

[0045] This embodiment solves the problems of low dredging efficiency, single function, and dependence on manual fishing of traditional barrages through structural innovation, and provides an efficient and low-consumption solution for the comprehensive treatment of river channels.

[0046] In a specific implementation manner, the treatment area 4 realizes efficient separation and resource treatment of sediment and floating objects through the integrated design of a multi-stage parallel flow channel and a sedimentation and classification device. The specific structure and function realization are as follows:

[0047] In the treatment area 4, multiple groups of parallel partitions 5 are longitudinally arranged along the direction of the river channel water flow, dividing the flow channel space into the fifth channel 10, the sixth channel 11, the seventh channel 12, and the eighth channel 13 that extend in the same direction. Each channel operates independently without interference, and the water flow pattern is controlled by designing the height and spacing of the partitions 5 to prevent the mixing of sediment and floating objects across channels.

[0048] Furthermore, an array of high-strength I-beams 14 is laid at the bottom of the fifth channel 10 parallel to the water flow direction. The spacing of the I-beams 14 is optimized according to the particle size distribution of the stone grains, such as 5 - 10 cm, to ensure that large-sized stone grains are effectively intercepted and deposited at the bottom of the gaps between the I-beams 14. The surface of the I-beams 14 is treated with rust prevention to extend their service life.

[0049] An adjustable floating cable 15 is installed on the water surface. One end of it is fixed to the side wall of the main dam body 1, and the other end is connected to the secondary dam body 2 through a tensioning device. The floating cable 15 is made of high-strength nylon rope or buoyancy tube material, and anti-tangling protrusions are provided on its surface to prevent floating objects from getting entangled. Its height is slightly higher than the designed water level, such as 10 - 20 cm, to ensure that floating objects are completely intercepted.

[0050] The end of the fifth channel 10 is connected to the floating object treatment channel 16 through an arc-shaped deflector. The bottom of the treatment channel is provided with a low-slope ramp, such as 1:50, to guide the floating objects to move along the water flow direction. The end is connected to a floating object collection pool 17, and the collection pool is equipped with an automatic slag discharge door and a hydraulic lifting device to realize the regular cleaning of floating objects.

[0051] Furthermore, stainless steel separation screens are sequentially arranged along the water flow direction in the sixth channel 11, the seventh channel 12, and the eighth channel 13. The aperture of the screens is designed in grades according to the sediment particle size distribution, such as 1 - 3 mm in the sixth channel 11, 3 - 10 mm in the seventh channel 12, and >10 mm in the eighth channel 13, to achieve the step-by-step sedimentation of small-sized, medium-sized, and large-sized sand and gravel. The screens are installed obliquely at an angle of 15° - 30° to the horizontal plane to assist the sediment to slide down by gravity.

[0052] Independent sedimentation chambers are formed in the areas below the screens in each channel, corresponding to:

[0053] The first-level sedimentation chamber 18 in the sixth channel 11: collecting fine sand with a particle size <3 mm;

[0054] The second-level sedimentation chamber 19 in the seventh channel 12: collecting medium sand with a particle size of 3 - 10 mm;

[0055] The third-level sedimentation chamber 20 in the eighth channel 13: collecting coarse sand and sludge with a particle size >10 mm.

[0056] Technical advantages of the integrated design of the treatment area 4 through multi-stage parallel flow channels and sedimentation and classification devices:

[0057] Clear functional partitioning: The treatment paths for floating debris and sediment are independent to avoid cross-contamination;

[0058] Improved classification efficiency: Precise separation of sediment particle sizes is achieved through a pore size gradient sieve, and the recovered gravel gradation is controllable;

[0059] Reduced maintenance costs: The modular sieve and I-beam 14 components support rapid disassembly and replacement, reducing downtime.

[0060] Through the synergistic effect of the flow channel segmentation, classification sieve, and floating debris interception system, this embodiment constructs a complete technical chain of "pre-separation - particle size classification - resource recovery", providing an engineering solution for the comprehensive treatment of river sediment and floating debris.

[0061] In a specific embodiment, the separation zone 3 realizes the pretreatment of sediment and floating debris and the optimization of the flow pattern through a multi-stage series flow channel and precise overflow design, providing efficient flow diversion conditions for the subsequent treatment zone 4. The specific structure and function realization are as follows:

[0062] A plurality of groups of parallel partitions 5 are longitudinally arranged in the separation zone 3 along the direction of the river flow, dividing the flow channel into the first channel 6, the second channel 7, the third channel 8, and the fourth channel 9 that extend in the same direction. Each channel is strictly coaxially arranged with the corresponding channel in the downstream treatment zone 4, that is, the first channel 6 → the fifth channel 10, the second channel 7 → the sixth channel 11, etc., to ensure the continuity of the water flow and sediment particles during the flow channel conversion and reduce the turbulent flow interference.

[0063] Furthermore, an array of high-strength I-beams 14 is laid at the bottom of the first channel 6 parallel to the water flow direction. The spacing of the I-beams 14 is optimized according to the particle size distribution of the stone grains, such as 8 - 15 cm, and the large-particle-size stones are intercepted at the bottom of the gaps between the I-beams 14 through physical interception. The surface of the I-beams 14 is coated with a wear-resistant and anti-corrosion coating to adapt to the long-term scouring environment;

[0064] An adjustable floating cable 15 is erected on the water surface to block the floating debris in the first channel 6. One end of it is fixed to the side wall of the main dam body 1, and the other end is connected to the top of the partition 5 through a spring tensioning device. The floating cable 15 adopts a double-layer composite structure with a high-strength steel wire as the inner core and an anti-UV buoyancy tube as the outer layer, and conical guide vanes are arranged on the surface to reduce the water flow resistance and prevent the floating debris from winding; its height is dynamically adjusted according to the designed water level, such as 15 - 25 cm higher than the water level, to ensure that the floating debris interception rate ≥ 95%.

[0065] Furthermore, the left side of the first channel 6 is the water inlet 21, and the left side of the fourth channel 9 is the water outlet 22; an overflow port 23 is arranged in the middle of the partition 5 between the first channel 6 and the second channel 7, and overflow ports 23 are arranged on the left and right sides of the partition 5 between the second channel 7 and the third channel 8, and an overflow port 23 is arranged on the right side of the partition 5 between the third channel 8 and the fourth channel 9.

[0066] Further, sludge troughs 24 are provided at the lower parts of the fourth channel 9 and the eighth channel 13. The bottoms of the first channel 6, the second channel 7, the third channel 8, the fourth channel 9, the fifth channel 10, the sixth channel 11, the seventh channel 12 and the eighth channel 13 are inclined surfaces 25, and the direction of the inclined surface 25 is high at the top and low at the bottom, with an inclination angle of 15 degrees. And a stepped structure 26 is provided between adjacent channels, with a height difference of 0.5 m. Under the action of the inclined surface 25.

[0067] Working principle:

[0068] River water enters the first channel 6 from the water inlet 21 of the first channel 6. The I-beams 14 provided in the first channel 6 can block large-diameter stone particles, and the floating garbage is blocked by the floating cables 15. The sand and gravel then enter the second channel 7 through the overflow port 23. The water flow is divided into two directions, left and right, in the second channel 7. The water flow on the left side enters the third channel 8 through the overflow port 23 on the left side of the partition. The water flow in the third channel 8 enters the fourth channel 9 through the overflow port 23 and flows out through the water outlet 22. Under the action of the inclined surface 25, the sediment is deposited in the sludge trough 24 in the fourth channel 9. Through the separation area 3 at the front end of the main dam body 1, the large-particle stone particles, floating garbage, sand and gravel, and sludge are initially separated. Through the coordinated optimization of the flow channel segmentation, hierarchical overflow and floating object interception system, this embodiment constructs an integrated technical system of "pretreatment-precise diversion-high-efficiency sedimentation", providing an efficient, reliable and scalable engineering solution for the treatment of sediment and floating objects in the barrage.

[0069] Embodiment 2

[0070] A method for removing sediment and floating objects, which is realized based on the dam structure. The specific process includes: the main dam body 1 and the auxiliary dam body 2 are in a normally closed state. River water enters the first channel 6 from the water inlet 21 of the first channel 6. The I-beams 14 arranged in the first channel 6 can block large-diameter stone particles, and the floating garbage is blocked by the floating cable 15. Then the gravel enters the second channel 7 through the overflow port 23. The water flow in the second channel 7 is divided into two directions, left and right. The water flow on the left enters the third channel 8 through the overflow port 23 on the left side of the partition, and the water flow in the third channel 8 enters the fourth channel 9 through the overflow port 23 and flows out through the water outlet 22. Under the action of the inclined surface 25, the sediment is deposited in the sludge tank 24 in the fourth channel 9. Through the separation area 3 at the front end of the main dam body 1, the large-particle stone particles, floating garbage, gravel and sludge are preliminarily separated. In the above preliminary separation method, the S-shaped channel formed by the partition can extend the water flow path within the same time, so that more gravel and sludge can stay in the separation area 3. When the main dam body 1 is opened, the river water carries the above-mentioned floating garbage, stone particles, gravel and sludge into the treatment area 4. Specifically, the floating garbage and stone particles enter the corresponding fifth channel 10. The stone particles settle at the bottom of the water, and the floating garbage floats on the water surface. It is guided to the floating object treatment channel 16 by the floating cable 15 and flows to the floating object collection pool 17. Gravels with different particle sizes are sequentially settled at the bottom of the sixth, seventh and eighth channels 13 under the action of separation sieves with different diameters. The sludge is deposited in the sludge tank 24 in the eighth channel 13 under the action of gravity. After the separation is completed, the main dam body 1 is closed and the auxiliary dam body 2 is opened to drain the river water in the treatment area 4. All the sundries remain in the treatment area 4, and relevant equipment is used to collect them for recycling. Through the above scheme, the gravel can be screened three times, and the gravel with small, medium and large particle sizes can be separated, which is convenient for subsequent recycling, and the garbage and stone particles are separated and treated.

[0071] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A river-blocking dam structure with the synergistic effect of double dams, characterized in that, It includes a main dam body (1) and a secondary dam body (2). The upstream end of the main dam body (1) is a separation area (3) for initially separating garbage floating objects, stone particles, gravel, and sludge. Between the main dam body (1) and the secondary dam body (2) is a treatment area (4) for classifying and settling gravel of different particle sizes and separating garbage floating objects and stone particles.

2. The double-dam structure for a river-blocking dam with cooperative action according to claim 1, characterized in that, In the treatment area (4), several partitions (5) are arranged in the same direction as the river channel, dividing the treatment area (4) into fifth channels (10), sixth channels (11), seventh channels (12), and eighth channels (13) that are parallel in the same direction.

3. The double-dam structure for river blocking with collaborative action according to claim 2, characterized in that, At the bottom of the fifth channel (10), I-beams (14) are arranged, and the arrangement direction of the I-beams (14) is parallel to the river channel direction. On the water surface, a floating cable (15) is arranged, and one end of the floating cable (15) is fixed on the main dam body (1). At the end of the fifth channel (10), a floating object treatment channel (16) is also connected, and the end of the floating object treatment channel (16) is connected to a floating object collection pool (17).

4. A double-dam structure with cooperative action according to claim 3, characterized in that, In the sixth channel (11), seventh channel (12), and eighth channel (13), separation sieves with different pore diameters are sequentially arranged, and the pore diameters of the separation sieves increase sequentially along the water flow direction. Correspondingly, a primary settling chamber (18), a secondary settling chamber (19), and a tertiary settling chamber (20) are formed in the sixth channel (11), seventh channel (12), and eighth channel (13).

5. A double-dam collaborative action barrage structure according to claim 4, characterized in that, In the separation area (3), several partitions (5) are arranged in the same direction as the river channel, dividing the separation area (3) into first channels (6), second channels (7), third channels (8), and fourth channels (9) that are parallel in the same direction. The first channel (6) and the fifth channel (10) are on the same axis, the second channel (7) and the sixth channel (11) are on the same axis, the third channel (8) and the seventh channel (12) are on the same axis, and the first channel (6) and the eighth channel (13) are on the same axis.

6. A double-dam structure with collaborative action according to claim 5, characterized in that, At the bottom of the first channel (6), I-beams (14) are arranged, and the arrangement direction of the I-beams (14) is parallel to the river channel direction. On the water surface, a floating cable (15) is arranged, and one end of the floating cable (15) is fixed on the main dam body (1).

7. A double-dam structure with cooperative action according to claim 6, characterized in that, On the left side of the first channel (6) is a water inlet (21), and on the left side of the fourth channel (9) is a water outlet (22). In the middle of the partition (5) between the first channel (6) and the second channel (7), an overflow port (23) is arranged. On the left and right sides of the partition (5) between the second channel (7) and the third channel (8), overflow ports (23) are arranged. On the right side of the partition (5) between the third channel (8) and the fourth channel (9), an overflow port (23) is arranged.

8. A double-dam body cooperative action river-blocking dam structure according to any one of claims 7, characterized in that, Sludge troughs (24) are arranged at the lower parts of the fourth channel (9) and the eighth channel (13).

9. A double-dam cooperative barrage structure according to any one of claims 7, characterized in that The bottoms of the first channel (6), second channel (7), third channel (8), fourth channel (9), fifth channel (10), sixth channel (11), seventh channel (12), and eighth channel (13) are inclined surfaces (25), and the direction of the inclined surfaces (25) is high at the top and low at the bottom; and between adjacent channels is a stepped structure (26).

10. A method for removing sediment and floating objects, characterized in that, Implemented based on the barrage structure described in any one of claims 1-9. The specific process includes: Step 1: Pre-separation in the normally closed state The main dam body (1) and the auxiliary dam body (2) remain closed, and the river water enters the separation area (3) through the water inlet (21) of the first channel (6); The I-beam (14) barrier grid intercepts large-sized gravel particles, and the floating cable (15) intercepts floating objects; The sand and gravel enter the second channel (7) through the overflow port (23), the water flow is diverted to the third and fourth channels through the S-shaped channel, and the sludge is deposited in the sludge tank (24) of the fourth channel (9) under the action of the inclined surface (25); Step 2: Classification treatment after the main dam body (1) is opened The main dam body (1) is opened, and the river water carrying the pre-separated mixture enters the treatment area (4); Separation of floating objects and gravel particles: In the fifth channel (10), the floating objects are guided to the floating object collection pool (17) by the floating cable (15), and the gravel particles settle to the bottom; Three-stage screening of sand and gravel: In the sixth, seventh, and eighth channels, sand and gravel of small, medium, and large particle sizes are sequentially settled through sieves with different pore sizes; Sludge deposition: The sludge tank (24) of the eighth channel (13) collects the sludge settled by gravity; Step 3: Resource recovery after the auxiliary dam body (2) is opened After the separation is completed, the main dam body (1) is closed, the auxiliary dam body (2) is opened, and the river water in the treatment area (4) is drained; The remaining large-sized gravel particles, classified sand and gravel, sludge, and floating objects are classified and recovered through special equipment to achieve resource utilization.

Images