Lake and reservoir sludge treatment and resource utilization system

Abstract

The utility model discloses a lake and reservoir sludge treatment and resource utilization system, which relates to the technical field of environment-friendly desilting, and comprises a cutter suction dredger placed in a lake and reservoir for cutter suction of sludge; the floating pipe is connected with the cutter suction dredger; the first shore pipe is connected with the floating pipe; the screening and filtering device is connected with the first shore pipe and is used for coarsely screening the muddy water; the second shore pipe is connected with the screening and filtering device; the silt dam is arranged beside the lake and reservoir, and the other end of the second shore pipe is located in the silt dam; a water inlet pipe at one end of the conveying equipment is positioned in the silt dam, and a water outlet pipe at the other end is positioned in the lake reservoir. According to the system, through the technological process of cutter suction dredging, screening filtering and precipitation drying, silt is converted into cultivated land resources, residual water is recycled, and carbon sink development is achieved. The system is high in integration level, can synchronously solve the problems of desilting, water saving, land restoration and carbon neutralization, and has remarkable economic and ecological benefits.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection dredging technology, and in particular to a system for the treatment and resource utilization of lake and reservoir silt. Background Technology

[0002] With the continuous advancement of urbanization, the maintenance and cleaning of lakes and reservoirs have become increasingly important. Lake and reservoir dredging is an engineering project that removes silt, garbage, and other debris from the riverbed to make lakes and reservoirs deeper and wider, clearer, and improve the aquatic environment.

[0003] In existing technologies, silt is removed and discharged using a cutter suction dredger, and then pumped in by a silt pump and discharged to a silt disposal site via a silt pipe, thus achieving the purpose of dredging. However, the existing technology involves transporting the mixed water and silt together to the silt disposal site for treatment, resulting in water waste, secondary pollution, and high silt treatment costs. Utility Model Content

[0004] To address the problems in existing technologies, this utility model provides a system for the treatment and resource utilization of lake and reservoir silt, comprising:

[0005] A cutter suction dredger is placed in a lake or reservoir to dredge and suck up silt.

[0006] The floating pipe is connected to the cutter suction dredger;

[0007] The first shore pipe is connected to the floating pipe;

[0008] A screening and filtration device, connected to the first bank pipe, is used to coarsely screen mud and water.

[0009] The second bank pipe is connected to the screening and filtering device;

[0010] The silt-retention dam is constructed to the side of the lake / reservoir, and the other end of the second bank pipe is located inside the silt-retention dam.

[0011] The conveying equipment has an inlet pipe at one end located inside the silt-retaining dam, and an outlet pipe at the other end located inside the lake / reservoir.

[0012] Furthermore, the conveying device is a water pump or a siphon pipe.

[0013] Furthermore, it also includes a pressure pump connected to the second shore pipe.

[0014] Furthermore, the cutter suction dredger is an amphibious, multi-functional, environmentally friendly cutter suction dredger.

[0015] Furthermore, the screening and filtering device includes:

[0016] The box has an opening at the top;

[0017] A primary screening plate and a secondary screening plate are rotatably connected to the opening of the box body, with the primary screening plate located directly above the secondary screening plate, and the aperture of the primary screening plate being larger than that of the secondary screening plate.

[0018] The mud discharge pipe is connected to the side wall of the box, and the second bank pipe is connected to the mud discharge pipe.

[0019] Furthermore, the primary screening plate is a strip grid, and the secondary screening plate is a mesh grid.

[0020] The beneficial effects of the technical solution provided by this utility model are as follows: In this utility model, silt in lakes and reservoirs is dredged using a cutter suction dredger, filtered by a screening and filtration device, and then transported to a silt-retention dam located beside the lake or reservoir. The silt-water mixture is settled by the dam, and the clarified upper layer of residual water is discharged into the reservoir area through a conveying device to prevent water waste. The lower layer of concentrated sludge naturally dries to form farmland. This system, through a process of cutter suction dredging, screening and filtration, and sedimentation and drying, realizes the conversion of sediment into arable land resources, the recycling of residual water, and the development of carbon sequestration. The system has a high degree of integration and can simultaneously solve the problems of dredging, water conservation, land restoration, and carbon neutrality, resulting in significant economic and ecological benefits. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a system for the treatment and resource utilization of lake and reservoir silt provided by this utility model;

[0022] Figure 2 This is a structural schematic diagram of a screening and filtering device provided by this utility model.

[0023] Reference numerals: 1-Cutter suction dredger; 2-Floating pipe; 3-First shore pipe; 4-Screening and filtering device; 5-Second shore pipe; 6-Silt-retaining dam; 7-Conveying equipment; 8-Pressure pump; 9-Box body; 10-First-stage screening plate; 11-Sludge discharge pipe; 12-Operating platform; 13-Ladder; 14-Safety net; 15-Second-stage screening plate. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0026] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "bottom," "top," "left," and "right" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] It should also be noted that, in this embodiment, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] See Figure 1 and Figure 2 A system for the treatment and resource utilization of lake and reservoir silt includes: a cutter suction dredger 1, which is an amphibious, multi-functional, and environmentally friendly cutter suction dredger. The cutter suction dredger 1 is placed in the lake or reservoir. The mud pipe of the cutter suction dredger 1 is connected to a floating pipe 2. The floating pipe 2 is connected to a first bank pipe 3. The first bank pipe 3 is connected to a screening and filtration device 4. A second bank pipe 5 is also connected to the screening and filtration device 4. A silt-retaining dam 6 is constructed next to the lake or reservoir. An impermeable layer can be installed inside the silt-retaining dam 6. The other end of the second bank pipe 5 is located inside the silt-retaining dam 6. A conveying device 7 is also installed on the bank. The inlet pipe of the conveying device 7 is located inside the silt-retaining dam 6, and the outlet pipe of the other end is located inside the lake or reservoir.

[0029] The amphibious multi-functional environmentally friendly cutter suction dredger is equipped with a cutter suction device and a centrifugal pump. It sucks the bottom sludge of the reservoir into the mud pipe through the cutter suction head, and then transports it to the first shore pipe 3 through the floating pipe 2. The mud then enters the screening and filtration device, which can effectively filter out impurities and plant residues in the sludge, thereby avoiding pump blockage and improving dredging efficiency. The mud-water mixture after screening enters the silt dam 6. The clear water in the upper layer after sedimentation in the silt dam 6 is discharged to the reservoir area through the conveying equipment, and the thick mud in the lower layer dries naturally to form farmland.

[0030] The construction process will not affect the normal operation of the reservoir, nor will it cause secondary pollution. There is no land relocation or land occupation, and it will not adversely affect nearby villages, roads, or farmland. It is highly suitable for dredging small and medium-sized reservoirs in the Loess Plateau region, and the silt treatment and disposal adheres to the principles of economy, safety, environmental protection, and recycling. The silt in the reclamation area will be solidified through natural sedimentation, drying, and dehydration. No substances or reagents that affect water quality will be added during the dehydration process. After the silt is solidified in situ, the land will be directly used as farmland. Specifically, the silt from the reservoir bottom is pumped into the silt-retaining dam and allowed to settle naturally. The clear water on top is returned to the reservoir, while the thick sludge at the bottom is naturally dehydrated and solidified to form land for reuse. The solidified material requires no secondary transportation or subsequent treatment, effectively accelerating the pace of returning farmland to grassland within the basin, improving the basin's ecological environment, creating favorable conditions for local agricultural production, and further promoting the economic development of rural areas around the reservoir.

[0031] In addition to forming land for farmland, solidified mud can also be used to plant seedlings to form carbon sink forests, connecting with the carbon trading market, and can be further processed into building material raw materials (such as brick making and roadbed materials).

[0032] It is worth noting that this system, through a process of dredging, screening, filtration, sedimentation, and drying, transforms silt into arable land resources, recycles wastewater, and develops carbon sequestration. The system is highly integrated, simultaneously addressing dredging, water conservation, land remediation, and carbon neutrality, resulting in significant economic and ecological benefits.

[0033] Furthermore, the conveying equipment 7 is a water pump or a siphon. When the water level of the silt-retention dam is lower than the water level of the lake or reservoir, the water can be conveyed from the lower level to the higher level of the river channel by the water pump; when the water level of the silt-retention dam is higher than the water level of the lake or reservoir, the water is conveyed by the siphon. The siphon is economical and environmentally friendly.

[0034] Furthermore, a booster pump 8 is installed on the bank. There can be two second bank pipes 5. The first second bank pipe 5 is connected to the screening and filtration device 4, and the second second bank pipe 5 is connected to the siltation dam 6. The inlet of the booster pump is connected to the first second bank pipe 5 through a flange, and the outlet of the booster pump is connected to the second second bank pipe 5 through a flange. The booster pump 8 can speed up the conveying efficiency.

[0035] Furthermore, the screening and filtering device includes: a box body 9, with an opening at the top of the box body 9, the opening occupying only half of the box body 9, the other half serving as an operating platform 12; a mud discharge pipe 11 connected to the bottom of the side wall of the box body 9; a second bank pipe 5 connected to the mud discharge pipe 11 via a flange; a primary screening plate 10 and a secondary screening plate 15 connected to the opening of the box body 9; the primary screening plate 10 located directly above the secondary screening plate 15; and the aperture of the primary screening plate 10 being larger than the aperture of the secondary screening plate 15.

[0036] The primary screening plate 10 consists of a first rectangular frame and several first fixed rods welded inside the first rectangular frame to form a strip grid. The spacing between the first fixed rods of the strip grid is 3-4 cm, which can effectively filter out larger diameter debris such as stones, construction waste, and plant roots. The secondary screening plate 15 consists of a second rectangular frame and second fixed rods welded alternately inside the second rectangular frame to form a mesh grid. The aperture of the holes formed between the second fixed rods can be (2-3) x (2-3) cm, which can effectively filter out smaller diameter debris and plant residue.

[0037] The secondary screening plate 15 is the same size as the opening and is fixed at the opening. The size of the primary screening plate 10 is half that of the secondary screening plate 15. A sliding groove is provided between the opposite side walls of the housing 9 and the operating platform 12. The primary screening plate 10 is slidably connected in the sliding groove. In use, the primary screening plate 10 is located above the secondary screening plate 15. The mud-water mixture transported by the first bank pipe 3 is first screened by the primary screening plate 10, and then screened by the secondary screening plate. The screened mud-water mixture enters the housing 9 and exits through the outlet. The mud pipe 11 and the second bank pipe 5 transport the silt to the silt-retaining dam 6, reducing pollution of the dam and protecting the aquatic ecosystem. Additionally, a ladder 13 is connected to the side wall of the tank 9, allowing workers to use it as an operating platform 12 to clean debris from the primary screening plate 10 and the secondary screening plate 15. First, workers clean the debris from the primary screening plate 10, then slide the primary screening plate 10 to expose the debris on the secondary screening plate 15, which is then cleaned. Next, an overflow pipe is connected to the upper part of the tank 9, allowing silt to be discharged when the tank is full. Furthermore, a safety net 14 is connected to the top of the tank to ensure the safety of workers during debris removal.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for the treatment and resource utilization of lake and reservoir silt, characterized in that, include: A cutter suction dredger (1) is placed in a lake or reservoir to dredge and suck up silt. The floating pipe (2) is connected to the cutter suction dredger (1); The first shore pipe (3) is connected to the floating pipe (2); A screening and filtration device (4) is connected to the first bank pipe (3) and is used to coarsely screen mud and water. The second bank pipe (5) is connected to the screening and filtering device (4); The silt-retention dam (6) is constructed to the side of the lake and reservoir, and the other end of the second bank pipe (5) is located inside the silt-retention dam (6); The conveying equipment (7) has an inlet pipe at one end located inside the silt-retaining dam (6) and an outlet pipe at the other end located inside the lake.

2. The system for lake and reservoir silt treatment and resource utilization according to claim 1, characterized in that, The conveying device (7) is a water pump or a siphon pipe.

3. The lake and reservoir sludge treatment and resource utilization system according to claim 1, characterized in that, Also includes: A booster pump (8) is connected to the second shore pipe (5).

4. The lake and reservoir silt treatment and resource utilization system according to claim 1, characterized in that, The cutter suction dredger (1) is an amphibious, multi-functional, environmentally friendly cutter suction dredger.

5. The lake and reservoir silt treatment and resource utilization system according to claim 1, characterized in that, The screening and filtering device includes: The box (9) has an opening at the top; A primary screening plate (10) and a secondary screening plate (15) are rotatably connected to the opening of the box (9). The primary screening plate (10) is located directly above the secondary screening plate (15), and the aperture of the primary screening plate (10) is larger than that of the secondary screening plate (15). The mud discharge pipe (11) is connected to the side wall of the box body (9), and the second bank pipe (5) is connected to the mud discharge pipe (11).

6. The lake and reservoir silt treatment and resource utilization system according to claim 5, characterized in that, The primary screening plate (10) is a strip grid, and the secondary screening plate (15) is a mesh grid.

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