River dredging anti-pollution diffusion device

Abstract

This invention relates to a river dredging and pollution prevention device, comprising: a pollution interception net, installed in the water behind the dredging equipment, with its traction rope connected to the dredging equipment; multiple absorbent material ropes forming an interception net installed under the float; and a bottom hook connected to the absorbent material ropes; a sediment purification agent addition device, connected to a nozzle pipe via a metering device and a hose, with the nozzle pipe installed under the float; and a pollution concentration monitoring device installed in the water behind the interception net and connected to the float. When the pollution concentration exceeds a set value, the sediment purification agent addition device is controlled to add sediment purification agent to the water. This invention effectively intercepts the spread of pollutants caused by disturbance of sediment during the dredging process in small and medium-sized urban inland rivers. Furthermore, the controlled addition of sediment purification agent further reduces pollution spread and mitigates any remaining polluted sediment. It integrates dredging and sediment purification for simultaneous construction.

Description

Technical Field

[0001] This invention belongs to the field of water environment management, and in particular relates to a device for preventing pollution diffusion during river dredging, which is used to control the diffusion of polluted mud generated during river dredging and to further purify it. Background Technology

[0002] The treatment of polluted sediment in inland rivers and canals generally involves a combination of dredging and sediment remediation. Currently, dredging of inland rivers and canals is primarily done manually or mechanically. Especially when dry-water operations are not feasible, using machinery within the river canal can cause the spread of polluted sediment, not only increasing the difficulty of remediation but also resulting in poor dredging effectiveness. Furthermore, after dredging, further remediation is needed to remove surface polluted sludge or lightly polluted sediment that is difficult to remove; however, these two processes are usually carried out separately, which not only prolongs the construction period but also increases the cost of secondary remediation.

[0003] Whether it is possible to effectively control the spread of contaminated sediment during mechanical dredging with water, which could cause secondary pollution, and whether sediment purification could be carried out simultaneously with the dredging process to greatly increase construction efficiency, are all questions worth exploring. Summary of the Invention

[0004] To address the shortcomings of the existing technologies, this invention provides a river dredging and pollution prevention device that effectively solves the problem of polluted sediment diffusion during river dredging. This not only significantly improves on-site safety and civilized construction but also reduces the risk of secondary pollution and subsequent dredging. Simultaneously, sediment purification can be carried out, reducing the investment of manpower and resources, and minimizing actual construction costs while ensuring treatment effectiveness.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A device for dredging and preventing pollution spread in river channels, comprising:

[0007] A pollution interception net is set in the water behind the dredging equipment and includes a traction rope, a float, an absorbent material rope, and a bottom hook. One end of the traction rope is connected to the dredging equipment, and the other end is connected to the float. Multiple absorbent material ropes are set under the float to form an interception net, and the tail of the absorbent material rope is connected to the bottom hook.

[0008] A sediment purification agent adding device, wherein the sediment purification agent in the sediment purification agent adding device is stored in the dredging equipment and is connected to the nozzle pipe through a metering device and a hose, and the nozzle pipe is located below the float.

[0009] A pollution concentration monitoring device is installed in the water behind the interception net and connected to the float; when the pollution concentration exceeds the set value, the pollution concentration monitoring device controls the bottom sediment purification agent addition device to add bottom sediment purification agent to the water.

[0010] As an embodiment of the device of the present invention, there are multiple pontoons, and the multiple pontoons are connected together by a pontoon chain.

[0011] As an embodiment of the device of the present invention, the length of the pontoon is taken as the smaller of twice the width of the dredging equipment or the width of the river channel.

[0012] As an embodiment of the device of the present invention, the length of the adsorption material rope is 1-1.5 times the water depth, and the material is a synthetic material selected from polyvinyl chloride, polypropylene or modified fibers.

[0013] As an embodiment of the device of the present invention, the adsorption material rope includes a central thin rope and filaments arranged radially in a three-dimensional manner along the length of the central thin rope.

[0014] As an embodiment of the device of the present invention, the nozzle pipe includes a main pipe fixed to the bottom of the float and a plurality of branch pipes distributed in the water body. The main pipe communicates with the interior of the branch pipes, and a plurality of nozzles are arranged along the length of the branch pipes.

[0015] As an embodiment of the device of the present invention, the branch pipe is perpendicular to the water body, the nozzle at the top is located 0.1m below the water body, and the nozzle at the bottom is 0.5m away from the bottom of the river.

[0016] In one embodiment of the device of the present invention, the main pipe is connected to the chemical tank on the dredging equipment via the hose, the bottom sludge purifying agent is stored in the chemical tank, and the length of the hose is 1.2-1.5 times the distance from the float to the chemical tank.

[0017] As an embodiment of the device of the present invention, the metering device is connected to the pollution concentration monitoring device and has the function of automatically adjusting the flow rate.

[0018] As an embodiment of the device of the present invention, the pollution concentration monitoring device includes a pollution concentration monitoring device and a reverse control system. The pollution concentration monitoring device is used to measure the real-time value of the pollution concentration of the water body and upload the data to the reverse control system through a signal line. The reverse control system regulates the opening and closing of the metering device and the flow rate adjustment according to the limit value set by the system when the limit value is exceeded.

[0019] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0020] 1. It has a good interception effect on the spread of pollutants caused by the disturbance of bottom sediment during the dredging of small and medium-sized urban inland rivers.

[0021] 2. By adding sediment purifiers in a controlled manner, the spread of pollution can be further reduced, and the pollution of unremoved sediment can be mitigated.

[0022] 3. By further integrating dredging and bottom sediment purification into simultaneous construction, construction efficiency has been greatly improved. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an exemplary plan view of an embodiment of the river dredging and pollution prevention device of the present invention.

[0025] Figure 2 This is an exemplary elevation view of an embodiment of the river dredging and pollution prevention device of the present invention.

[0026] The correspondence between the labels in the diagram is as follows:

[0027] 1-Dredging equipment; 2-Excavator; 3-Reverse control system; 4-Medication tank; 5-Traction rope; 6-Float; 7-Hose; 8-Absorbent material rope; 9-Bottom hook; 10-Pollution concentration monitoring equipment; 11-Signal rope; 12-Riverbank line; 13-Connecting rope; 14-Main pipe; 15-Nozzle. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0029] It should be understood that in the description of this invention, unless otherwise explicitly specified and limited, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for simplifying the description, and do 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, they should not be construed as limitations on the invention. Furthermore, terms such as "installed," "connected," and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] refer to Figure 1 and Figure 2 This invention provides a river dredging and pollution prevention device, which mainly includes a pollution interception net, a bottom sediment purification agent addition device, and a pollution concentration monitoring device.

[0031] The pollution interception net is set in the water behind the dredging equipment and consists of a tow rope 5, floats 6, absorbent material ropes 8, and bottom hooks 8. Two tow ropes 5 are typically used; for wider rivers or larger dredging equipment, one or two additional anchor points can be added. The dredging equipment 1 is a boat structure with an excavator 2 mounted at the front, which travels on the river surface, using the excavator 2 to mechanically dredge the water. One end of the tow rope 5 is connected to the dredging equipment 1, with two anchor points located on the left and right sides of the stern. The other end of the tow rope 5 is connected to multiple floats 6, which are linked together by a float chain. The anchor points of the two tow ropes 5 are located at both ends of the float chain. The distance from the stern to the floats 6 is generally approximately 5m-20m, depending on the size of the river.

[0032] Furthermore, the total length of the multiple pontoons 6 is generally twice the width of the dredging equipment 1 or the width of the river channel (whichever is smaller); hooks are provided under the pontoons 6 to fix the absorbent material ropes 8 and nozzle pipes, and multiple absorbent material ropes 8 are set under the pontoons 6 to form an interception net.

[0033] Furthermore, the length of the absorbent material rope 8 is 1-1.5 times the water depth, and it can be made of synthetic materials such as polyvinyl chloride, polypropylene, and modified fibers. The absorbent material rope 8 consists of a central thin rope and multiple ropes arranged along the length of the central thin rope. The absorbent material rope 8 is a rope-like structure with the thin rope as the center and its filaments radiating outwards in a three-dimensional state. It has a certain degree of rigidity and flexibility. The absorbent material ropes 8 are tied together to form a net. The tail of the absorbent material rope 8 is connected to a bottom hook 9 so that it can sink into the water. The bottom hook 9 can be made of stones, metal blocks, etc.

[0034] Furthermore, the nozzle pipe is used to uniformly add bottom sediment purification agent into the water. The nozzle pipe consists of a main pipe 14 hanging under the bottom of the float 6 and branch pipes 15 distributed in the water. The main pipe 14 is set on the hook at the bottom of the float along the length of multiple floats 6. The number of branch pipes 15 is reasonably set according to the length of the float, with a spacing of about 0.1-0.3m. The branch pipes 15 are perpendicular to the water. Each branch pipe has multiple nozzles distributed along the height direction. The first nozzle at the top is located 0.1m below the water, and the last nozzle at the bottom is 0.5m from the bottom of the channel. For shallow channels, the height of the last nozzle at the bottom can be adjusted, with an adjustment range of not less than 1 / 4 of the channel depth.

[0035] Furthermore, the main pipe 14 is connected to the chemical tank 4 on the hull via a hose 7. The chemical tank 4 contains the sediment purification agent for the sediment purification agent addition device. The length of the hose 7 is 1.2-1.5 times the distance from the buoy 6 to the chemical tank 4 to prevent it from breaking if it is too short or getting tangled if it is too long. The chemical tank 4 is part of the sediment purification agent addition device.

[0036] Furthermore, the sediment purification agent addition device consists of an automatic reagent proportioning device (optional), a reagent tank, and a metering device, all of which can be mature products on the market. The automatic reagent proportioning device is used to prepare the sediment purification agent. The prepared sediment purification agent is stored in the reagent tank 4. One end of the hose 7 is connected to the reagent tank 4, and the other end of the hose 7 is connected to the main pipe 14 of the nozzle pipe. The metering device can be a solenoid valve, which is installed on the hose 7. The metering device is further connected to the pollution concentration monitoring device and has the function of automatically adjusting the flow rate to reasonably control the reagent addition time and quantity.

[0037] Furthermore, the pollution concentration monitoring device consists of a pollution concentration monitoring device 10 and a reverse control system 3. The pollution concentration monitoring device 10 is set in the water body behind the interception net and fixed to the float 6 with a connecting rope 13 at a distance of about 1m-3m from the float 6. It is used to measure the real-time value of SS concentration in the water body and upload the data to the reverse control system 3 through the signal line 11. Here, SS is the abbreviation of Suspended Solid or Suspended Substance, which refers to suspended solids in water.

[0038] Furthermore, the anti-control system 3 adjusts the opening and closing of the metering device and the flow rate when the SS concentration limit is exceeded, based on the system's set SS concentration limit. The adjustment amount can be reasonably selected according to the set calculation formula, which is existing technology and will not be elaborated here.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. It has a good interception effect on the spread of pollutants caused by the disturbance of bottom sediment during the dredging of small and medium-sized urban inland rivers.

[0041] 2. By adding sediment purifiers in a controlled manner, the spread of pollution can be further reduced, and the pollution of unremoved sediment can be mitigated.

[0042] 3. By further integrating dredging and bottom sediment purification into simultaneous construction, construction efficiency has been greatly improved.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

[0044] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A device for dredging and preventing pollution spread in river channels, characterized in that, include: A pollution interception net, set in the water behind the dredging equipment, includes a towing rope, a buoy, absorbent material ropes, and a bottom hook. One end of the towing rope is connected to the dredging equipment, and the other end is connected to the buoy. Multiple absorbent material ropes are set under the buoy to form an interception net, and the tail of each absorbent material rope is connected to the bottom hook. The dredging equipment is a boat structure with an excavator at the front end, which travels on the river surface and uses the excavator at the front end to mechanically dredge the water. A sediment purification agent adding device, wherein the sediment purification agent in the sediment purification agent adding device is stored in the dredging equipment and is connected to the nozzle pipe through a metering device and a hose, and the nozzle pipe is located below the float. A pollution concentration monitoring device is installed in the water behind the interception net and connected to the float; when the pollution concentration exceeds the set value, the pollution concentration monitoring device controls the bottom sediment purification agent addition device to add bottom sediment purification agent to the water. The metering device is connected to the pollution concentration monitoring device and has the function of automatically adjusting the flow rate.

2. The river dredging and pollution prevention device as described in claim 1, characterized in that: The number of pontoons is multiple, and the multiple pontoons are connected together by a pontoon chain.

3. The river dredging and pollution prevention device as described in claim 1, characterized in that: The length of the pontoon is the smaller of twice the width of the dredging equipment or the width of the river channel.

4. The river dredging and pollution prevention device as described in claim 1, characterized in that: The length of the absorbent material rope is 1-1.5 times the water depth, and the material is a synthetic material selected from polyvinyl chloride, polypropylene, or modified fibers.

5. The river dredging and pollution prevention device as described in claim 1, characterized in that: The absorbent material rope includes a central thin rope and filaments that radiate outwards in a three-dimensional manner along the length of the central thin rope.

6. The river dredging and pollution prevention device as described in claim 1, characterized in that: The nozzle pipe includes a main pipe fixed to the bottom of the float and multiple branch pipes distributed in the water body. The main pipe communicates with the interior of the branch pipes, and multiple nozzles are arranged along the length of the branch pipes.

7. The river dredging and pollution prevention device as described in claim 6, characterized in that: The branch pipe is perpendicular to the water body, the top nozzle is located 0.1m below the water body, and the bottom nozzle is 0.5m from the bottom of the river channel.

8. The river dredging and pollution prevention device as described in claim 6, characterized in that: The main pipe is connected to the chemical tank on the dredging equipment via the hose. The bottom sludge purifying agent is stored in the chemical tank. The length of the hose is 1.2-1.5 times the distance from the float to the chemical tank.

9. The river dredging and pollution prevention device as described in claim 1, characterized in that: The pollution concentration monitoring device includes a pollution concentration monitoring device and a reverse control system. The pollution concentration monitoring device is used to measure the real-time value of the pollution concentration in the water body and upload the data to the reverse control system via a signal line. The reverse control system adjusts the opening and closing of the metering device and the flow rate when the limit value is exceeded, according to the system-set limit value.

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