A device for in-situ remediation of black and smelly sediment

Abstract

This utility model relates to the technical field of sediment remediation, specifically disclosing an in-situ remediation device for black and odorous sediment. It includes a hull, a reagent loading tank mounted on the hull, a pumping device, an injection tube, and an operating assembly. The reagent loading tank is connected to the injection tube via the pumping device. The operating assembly includes a first sleeve and a second sleeve. The injection tube passes through the first sleeve and can move up and down. The first sleeve has a first fastener for locking the relative position of the injection tube and the first sleeve. The second sleeve is horizontally positioned and fixed to the hull. A rotating rod is fixed to the outside of the first sleeve, inserted into the second sleeve and rotatable. The second sleeve has a second fastener for locking the relative position of the rotating rod and the second sleeve. This utility model can directly pump the bacterial agent into the sediment, avoiding water dilution. Furthermore, the insertion depth and horizontal angle of the injection tube can be independently adjusted to ensure precise targeting of the core pollution area while minimizing shear disturbance to the sediment.

Description

Technical Field

[0001] This utility model relates to the technical field of sediment remediation, and specifically discloses an in-situ remediation device for black and odorous sediment. Background Technology

[0002] The black and odorous state of lake and river sediments is a typical consequence of eutrophication and organic pollution. Under anaerobic conditions, sulfate-reducing bacteria and methanogens in the sediment decompose organic matter, producing black and odorous substances such as hydrogen sulfide (H2S), ammonia nitrogen (NH3-N), and volatile organic acids (VFAs). Simultaneously, they release secondary pollutants such as phosphorus and heavy metals, forming an "endogenous pollution reservoir." According to statistics from the Ministry of Ecology and Environment, over 60% of heavily polluted water bodies in my country suffer from black and odorous sediments. Traditional dredging methods are costly (over 200 yuan per cubic meter) and easily damage the ecosystem, necessitating the development of efficient, low-disturbance in-situ remediation technologies.

[0003] Aerobic / anaerobic compound microbial agents have been proven to effectively degrade organic matter in sediment, converting H2S into elemental sulfur and nitrifying NH3-N into nitrates through biological oxidation, and solidifying heavy metals. However, their application faces two major bottlenecks: (1) Insufficient dosing precision: the surface spraying method causes the microbial agent to be suspended in the water body, making it impossible to accurately act on the anaerobic layer of the sediment; (2) Difficulty in disturbance control: mechanical stirring will damage the sediment structure, accelerate the release of pollutants, and cause secondary pollution. For example, existing in-situ remediation technologies, such as the injection device disclosed in patent 202211157928.1 for the remediation of polluted river and lake sediments, propose a linkage mechanism of "boat-body - traction line - injection blades": as the boat moves forward, the traction balance shaft rolls along the surface of the sediment, driving the injection blades to rotate and inject the remediation agent into the sediment layer. Although this method can be used for in-situ remediation of sediments, the rotating blades continuously plow and cut the sediment, destroying the original stratification structure and causing the instantaneous release of hydrogen sulfide, ammonia nitrogen, and heavy metals, resulting in secondary pollution. In addition, the blades are in continuous positive pressure contact with the sediment surface, increasing the energy consumption of the boat, and are prone to jamming when encountering hard sediment layers, resulting in insufficient reliability. Therefore, there is an urgent need for an in-situ remediation device with adjustable injection depth and low disturbance to overcome the above problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an in-situ remediation device for black and odorous sediment.

[0005] This utility model discloses an in-situ remediation device for black and odorous sediment, which adopts the following technical solution:

[0006] A device for in-situ remediation of black and odorous sediment includes a hull, a reagent loading tank mounted on the hull, a pumping device, an injection tube, and an operating assembly. The reagent loading tank is connected to the injection tube via the pumping device. The operating assembly includes a first sleeve and a second sleeve. The injection tube passes through the first sleeve and is movable up and down. The first sleeve is provided with a first fastener for locking the relative position of the injection tube and the first sleeve. The second sleeve is horizontally arranged and fixed to the hull. A rotating rod is fixed to the outside of the first sleeve. The rotating rod is inserted into the second sleeve and is rotatable. The second sleeve is provided with a second fastener for locking the relative position of the rotating rod and the second sleeve.

[0007] Preferably, both the first sleeve and the second sleeve are provided with fastening nuts, and both the first fastener and the second fastener are fastening bolts.

[0008] Preferably, the second sleeve and the rotating rod are T-shaped.

[0009] Preferably, the end of the injection tube is provided with multiple injection holes.

[0010] Preferably, the injection tube is equipped with a sensor.

[0011] Preferably, the pumping device includes an injection pump and an injection hose assembled with the injection pump, the injection hose connecting the drug loading tank and the injection tube.

[0012] Preferably, the hull is equipped with a power supply device that provides power to the pumping equipment.

[0013] Preferably, the device also includes an engine located at the stern of the hull, and the power supply equipment provides power to the engine.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] This invention integrates a reagent loading tank, a pumping device, an injection tube, and a control assembly into the hull. The pumping device directly pumps the agent from the loading tank into the sediment, avoiding water dilution. The bidirectional adjustable control assembly, consisting of a first and second sleeve, allows the injection tube to be independently adjusted for insertion depth and horizontal angle, ensuring precise targeting of the contaminated core area while minimizing shear disturbance to the sediment. The control assembly maintains a fixed angle and depth in real time as the hull moves, preventing slippage or over-penetration of the injection end due to terrain undulations. This effectively suppresses the instantaneous release of hydrogen sulfide, ammonia nitrogen, and heavy metals, achieving efficient, low-disturbance, and low-cost in-situ remediation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the in-situ remediation device for black and odorous sediment in this embodiment;

[0017] Figure 2 This is a schematic diagram of the control components of the in-situ remediation device for black and odorous sediment in this embodiment.

[0018] Explanation of icon numbers:

[0019] 1. Hull; 2. Pharmaceutical loading tank; 3. Injection pump; 4. Injection hose; 5. Injection tube; 6. Control assembly; 61. First sleeve; 611. Rotary lever; 62. Second sleeve; 63. First fastener; 64. Second fastener; 7. Sensor; 8. Power supply equipment; 9. Engine. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] This embodiment discloses an in-situ remediation device for black and odorous sediment, referring to... Figure 1-2 The system includes a hull 1, a drug loading tank 2 mounted on the hull 1, a pumping device, an injection tube 5, and an operating assembly 6. The drug loading tank 2 is connected to the injection tube 5 via the pumping device. The operating assembly 6 includes a first sleeve 61 and a second sleeve 62. The injection tube 5 passes through the first sleeve 61 and can move up and down. The first sleeve 61 is provided with a first fastener 63 for locking the relative position of the injection tube 5 and the first sleeve 62. The second sleeve 62 is arranged laterally and fixed to the hull 1. A rotating rod 611 is fixed to the outside of the first sleeve 61. The rotating rod 611 is inserted into the second sleeve 62 and can rotate. The second sleeve 62 is provided with a second fastener 64 for locking the relative position of the rotating rod 611 and the second sleeve 62.

[0022] By moving the injection tube 5 up and down at the first sleeve 61 and then locking the position of the injection tube 5 with the first fastener 63, the height of the injection tube 5 can be adjusted, allowing the injected agent to be directly injected into the core pollution area of ​​the bottom sediment at a certain depth, achieving efficient contact between the agent and the pollutants and avoiding the dilution effect of the water. By rotating the first sleeve 61, the swivel rod 611 rotates circumferentially inside the second sleeve 62, and then the position of the swivel rod 611 is locked with the second fastener 64, the angle of the injection tube 5 can be adjusted. If the angle of the injection tube 5 into the sediment is too steep, it will create a "plowing" effect when the hull moves forward, lifting up the entire surface bottom sediment. If the angle is too gentle, it is easy to slide along the mud surface. However, by adjusting the angle through the cooperation of the first sleeve 61 and the second sleeve 62, the shear force is dispersed, maintaining a "shallow cut" state, which can control the disturbance area within a certain range, significantly reducing the turbidity and the instantaneous release of endogenous pollutants, and can be appropriately adjusted according to complex terrain.

[0023] As a preferred solution, both the first sleeve 61 and the second sleeve 62 are equipped with fastening nuts, and both the first fastener 63 and the second fastener 64 are fastening bolts. By tightening the bolts and pressing them against the sleeves, the locking purpose can be achieved. By adopting the above solution, the locking force can be guaranteed while simplifying the types of parts and reducing manufacturing and maintenance costs.

[0024] As a preferred option, the second sleeve 62 and the rotating rod 611 are T-shaped, which makes the control assembly compact and occupies little space, while enhancing rotational stability and facilitating flexible adjustment of the injection tube posture in narrow waters.

[0025] As a preferred option, the end of the injection tube 5 is provided with multiple injection holes, which can allow the bacterial agent to spread evenly in the circumference, increase the contact area with the bottom mud, improve the remediation efficiency and shorten the operation time.

[0026] As a preferred option, the injection tube 5 is equipped with a sensor 7, which can sense the depth and angle of the injection tube's insertion into the sediment in real time and feed the data back to the operating end to achieve closed-loop control, further improving injection accuracy and operational safety. Of course, in actual operation, the sensor 7 can also be omitted, and the insertion depth and angle of the injection tube 5 can be adaptively adjusted based on the operator's manual experience.

[0027] As a preferred option, the pumping equipment includes an injection pump 3 and an injection hose 4 assembled with the injection pump 3. The injection hose 4 connects the drug loading tank 2 and the injection pipe 5 to form a flexible delivery channel, which can adapt to the swaying of the hull and avoid the risk of leakage caused by rigid connection.

[0028] As a preferred option, the hull is equipped with a power supply device 8, which provides power to the pumping equipment to ensure continuous and stable output of the agent, reduce manual intervention, and improve the degree of automation.

[0029] As a preferred option, an engine 9 is provided at the stern of the hull, and the power supply equipment 8 simultaneously provides power to the engine 9, enabling the hull 1 to move forward at a constant speed, driving the injection tube to move smoothly in the bottom mud, and the bacterial agent can be evenly injected into the bottom mud.

[0030] As a preferred option, the black and odorous bottom sludge remediation microbial agent loaded in the agent loading tank 2 is composed of a variety of functional microorganisms, which can effectively degrade organic matter in the bottom sludge, convert H2S into elemental sulfur through biological oxidation, nitrate NH3-N into nitrates, and solidify heavy metals.

[0031] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A device for in-situ remediation of black and odorous sediment, characterized by, The injection device comprises a boat body, a medicament loading tank arranged on the boat body, a pumping delivery device, an injection tube and a control assembly; the medicament loading tank is connected with the injection tube through the pumping delivery device; the control assembly comprises a first sleeve and a second sleeve; the injection tube passes through the first sleeve and is movable up and down, the first sleeve is provided with a first fastener for locking the relative position of the injection tube and the first sleeve; the second sleeve is arranged transversely and fixed on the boat body, an outer side of the first sleeve is fixed with a rotating rod which is inserted into the second sleeve and rotatable, the second sleeve is provided with a second fastener for locking the relative position of the rotating rod and the second sleeve.

2. The black and odorous sediment in-situ remediation device according to claim 1, characterized in that, The first sleeve and the second sleeve are both provided with fastening nuts, and the first fastener and the second fastener are both fastening bolts. 3.The black and odorous sediment in-situ remediation device according to claim 1, characterized in that, The second sleeve and the rotating rod are in T shape.

4. The black and odorous sediment in-situ remediation device according to claim 1, characterized by, An end of the injection tube is provided with a plurality of injection holes. 5.The black and odorous sediment in-situ remediation device according to claim 1, characterized in that, The injection tube is equipped with a sensor. 6.The black and odorous sediment in-situ remediation device according to claim 1, characterized in that, The pumping delivery device comprises an injection pump and an injection hose equipped with the injection pump, the injection hose connects the medicament loading tank and the injection tube.

7. The black and odorous sediment in-situ remediation device according to claim 1, characterized by, The boat body is provided with a power supply device which provides power for the pumping delivery device. 8.The black and odorous sediment in-situ remediation device according to claim 7, characterized in that, The boat body is also provided with an engine arranged at the tail of the boat body, and the power supply device provides power for the engine.

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