Pneumatic pump ecological dredging system

Abstract

According to the pneumatic pump ecological desilting system, the front sludge inlet and the rear sludge inlet are formed in the single pneumatic pump body, the negative pressure suction technology of the pneumatic pump is utilized, the layered desilting process is adopted, firstly, surface floating sludge easy to flow is completely sucked through the first sludge inlet in the front end, then, exposed hard bottom sludge is loosened and broken through a reamer assisted by ultrasonic waves, and then the surface floating sludge is removed; and finally, the crushed hard bottom mud is sucked and removed out of the water body through a second mud inlet in the rear end. According to the invention, the existing pneumatic pump is technically improved, so that under the condition of not adding new dredging equipment, the diffusion pollution of bottom mud in the dredging process can be effectively prevented, the hard bottom mud can be efficiently removed, and real ecological environment-friendly dredging is realized under the condition of lower construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a dredging and desilting system, in particular to an ecological desilting system of an air-driven pump. BACKGROUND

[0002] It is known that the air-driven pump is an environmental desilting equipment widely used in the current ecological and environmental desilting project, which is a kind of desilting equipment that uses compressed air as power to pressurize and send the slurry into the pump body through negative pressure suction. The air-driven pump uses the negative pressure suction principle to use the water body pressure difference or the vacuum pump to generate high gradient negative pressure suction in the air-driven pump body to suck the sludge at the bottom of the water, and the desilting process will not disturb the sludge layer to cause secondary water pollution caused by sludge diffusion, and it can completely and thoroughly remove the floating sludge and flow sludge, which is the only ecological desilting technology that can completely remove the floating sludge and flow sludge in the wet desilting project, and is the ideal environmental desilting equipment in the ecological desilting project of rivers, lakes and reservoirs.

[0003] However, when the air-driven pump is used for desilting operation, the suction port of the air-driven pump is pressed into the sludge at the bottom of the water by the self-weight of the air-driven pump body or the hydraulic arm, and the working ship drags the air-driven pump and the suction port to break the soil and advance to suck the sludge at the bottom of the water. Such working method has relatively large resistance whether it is the resistance of pressing into the sludge layer or the resistance of dragging and advancing, and has excellent effect on the suction and removal of the sludge, flow sludge and floating sludge at the bottom of the water, but is limited by the size and power consumption of the ship body in the hard sludge desilting condition, and has limited single digging depth and low production capacity, and the effect is not good.

[0004] In order to improve the desilting efficiency of the hard sludge, a rotary reamer is usually added in front of the suction port of the air-driven pump as a soil breaking device to break the hard sludge when the air-driven pump desilting ship is used to treat the environmental desilting project containing hard sludge. Although this improves the desilting efficiency of the air-driven pump for hard sludge, the rotation of the reamer will cause the diffusion of the surface flowability floating sludge and flow sludge in the water body, and cannot achieve the purpose of ecological and environmental desilting. Moreover, in order to achieve good breaking effect of the hard sludge, the rotation speed of the reamer is usually high, and the speed of the hard sludge driven away from the body is greater than the starting flow speed of the hard sludge. In this way, not only the surface flowability floating sludge and flow sludge will produce diffusion phenomenon, but also the broken hard sludge will produce diffusion phenomenon, causing secondary pollution of the water body, and cannot achieve the goal of ecological desilting.

[0005] For such desilting project of removing floating sludge and flow sludge and dredging hard sludge, the current common method is to adopt a two-time construction process, that is, first using the air-driven pump to remove the surface floating sludge, flow sludge and sludge at the bottom of the water, and then using the environmental cutter suction ship to remove the hard sludge under the layer. Such construction method needs two sets of desilting equipment to carry out two-time construction, which increases the equipment cost and the construction cost, and when the environmental cutter suction ship is used for desilting construction, the environmental reamer swings back and forth to disturb the water body and the sludge layer, causing the diffusion of the sludge in the water body, and cannot achieve the real environmental effect.

[0006] Another solution is to use two pneumatic pumps in one dredging construction, and a soil breaking device is arranged between the two pneumatic pumps. The front pneumatic pump sucks and removes the surface layer of the water bottom, including the floating mud, flowing mud and silt, and the exposed lower layer of hard bottom mud is loosened and broken by the soil breaking device behind the front pneumatic pump, and then the broken hard bottom mud is sucked and removed from the water body by the second pneumatic pump behind the soil breaking device. This solution can not only efficiently remove all kinds of mud layers including floating mud, flowing mud and hard bottom mud, but also completely prevent the spread of all kinds of bottom mud in the water body during dredging, and is an effective ecological dredging solution. However, the use of two pneumatic pumps in one construction increases the equipment cost and the size of the construction ship, and the corresponding construction cost is also high. SUMMARY

[0007] In summary, the technical problem to be solved by the present application is to provide an ecological dredging system for implementing an ecological and environmental dredging project of a water body containing hard bottom mud by using a pneumatic pump negative pressure suction method and by means of layered treatment of the water bottom mud layer. The ecological dredging system can not only effectively dredge the hard bottom mud in an environmentally friendly manner, but also can ensure that the dredged bottom mud does not spread to the surrounding water body, causing secondary pollution to the water body, and achieving truly ecological and environmental dredging. At the same time, the ecological dredging system should have the characteristics of simple structure, low equipment cost and low construction cost.

[0008] Therefore, the purpose of the present application is to provide a new type of ecological dredging system for implementing an environmentally friendly dredging project of a water body containing hard bottom mud by using a pneumatic pump, which can perform efficient operation, and the ecological dredging system has a simpler structure, lower equipment cost and lower construction cost.

[0009] The purpose of the present application is achieved by the following technical solutions.

[0010] The pneumatic pump ecological dredging system comprises a pneumatic pump and a soil breaking device arranged on the water bottom, and the soil breaking device is connected to the pneumatic pump through a frame. The pneumatic pump comprises at least one pump body and a first mud inlet and a second mud inlet which are simultaneously connected to the pump body. The first mud inlet is located in front of the soil breaking device, and the first mud inlet sucks the organic matter soil, floating mud, flowing mud and silt on the surface layer of the water bottom in front of the soil breaking device into the pump body and discharges them out of the water body, exposing the lower layer of hard bottom mud. The soil breaking device loosens and breaks the exposed lower layer of hard bottom mud. The second mud inlet is located behind the soil breaking device, and the second mud inlet sucks the loosened and broken hard bottom mud into the pump body and discharges them out of the water body.

[0011] Further, while loosening and breaking the hard bottom mud, the soil breaking device drives the broken hard bottom mud to move towards the second mud inlet, and the movement speed of the broken hard bottom mud is less than the starting flow velocity of the broken hard bottom mud in the water body.

[0012] Further, the soil breaking device comprises a reamer shaft arranged on the frame, a driving mechanism directly connected with the reamer shaft, and reamer teeth distributed along the radial circumference of the reamer shaft, the reamer shaft is horizontally arranged and the axis thereof is perpendicular to the mud entering direction, the reamer teeth cut and push the sludge in the direction of the second mud entering port, and the rotational linear speed of the reamer teeth at the maximum circumference is less than the starting flow speed of the bottom mud to be removed.

[0013] Further, the reamer teeth are internally hollow cavities, and the hollow cavities are provided with ultrasonic transducers.

[0014] Further, the pump body is arranged above the soil breaking device, one end of the first mud entering port is communicated with the pump body through a hose, and the other end extends downward into the sludge in front of the soil breaking device; one end of the second mud entering port is communicated with the pump body through a hose, and the other end extends to the bottom mud behind the soil breaking device.

[0015] Further, a first component is arranged on the pump body, and a second component is arranged on the frame, and the first component and the second component form a sliding pair to realize the up-and-down movable connection between the pump body and the frame.

[0016] Further, the pump body is fixedly connected with the first mud entering port in front of the soil breaking device, one end of the second mud entering port is communicated with the pump body through a hose, and the other end extends to the bottom mud behind the soil breaking device.

[0017] Further, the pump body is fixedly connected with the second mud entering port behind the soil breaking device, one end of the first mud entering port is communicated with the pump body through a hose, and the other end extends downward into the sludge in front of the soil breaking device.

[0018] Further, a pressing device is arranged between the frame and the first mud entering port to press the first mud entering port into the sludge.

[0019] Further, a pressing mechanism is arranged between the frame and the second mud entering port to press the second mud entering port into the bottom mud.

[0020] The pneumatic pump ecological dredging system of the present application is provided with front and rear mud entering ports on a single pneumatic pump body, utilizes the negative pressure suction technology of the pneumatic pump, adopts the layered dredging process, first uses the front first mud entering port to suction and clean the easy-to-flow surface layer sludge, then uses the reamer to loosen and crush the exposed hard bottom mud, and finally uses the rear second mud entering port to suction and remove the crushed hard bottom mud out of the water body. Through the technical improvement of the existing pneumatic pump, without adding new dredging equipment, the present application can effectively prevent the diffusion and pollution of the bottom mud during the dredging process, and can efficiently remove the hard bottom mud, and realizes the real ecological and environmental protection dredging under the condition of low construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural perspective view of embodiment 1 of the present application.

[0022] Figure 2 is another structural perspective view of the embodiment 1 of the present application.

[0023] Figure 3 is a front view of the embodiment 1 of the present application.

[0024] Figure 4 is a top view of the embodiment 1 of the present application.

[0025] Figure 5 is a right view of the embodiment 1 of the present application.

[0026] Figure 6 is a structural perspective view of the rack in the embodiment 1 of the present application.

[0027] Figure 7 is another structural perspective view of the rack in the embodiment 1 of the present application.

[0028] Figure 8 is a structural perspective view of the second mud inlet in the embodiment 1 of the present application.

[0029] Figure 9 is another structural perspective view of the second mud inlet in the embodiment 1 of the present application.

[0030] Figure 10 is a structural perspective view of the soil breaking device in the embodiment 1 of the present application.

[0031] Figure 11 is a sectional view of the reamer tooth in the embodiment 1 of the present application.

[0032] Figure 12 is a structural perspective view of the embodiment 2 of the present application.

[0033] Figure 13 is another structural perspective view of the embodiment 2 of the present application.

[0034] Figure 14 is a front view of the embodiment 2 of the present application.

[0035] Figure 15 is a top view of the embodiment 2 of the present application.

[0036] Figure 16 is a structural perspective view of the rack in the embodiment 2 of the present application.

[0037] Figure 17 is a top view of the rack in the embodiment 2 of the present application.

[0038] Figure 18 is a structural perspective view of the second mud inlet in the embodiment 2 of the present application.

[0039] Figure 19 is a structural perspective view of the embodiment 3 of the present application.

[0040] Figure 20 is another structural perspective view of the present invention embodiment 3.

[0041] Figure 21 is an elevation view of the present invention embodiment 3.

[0042] Figure 22 is a structural perspective view of the rack in the present invention embodiment 3.

[0043] Figure 23 is a structural perspective view of the first mud inlet in the present invention embodiment 3.

[0044] Figure 24 is another structural perspective view of the first mud inlet in the present invention embodiment 3.

[0045] Figure 25 is a structural perspective view of the present invention embodiment 4.

[0046] Figure 26 is another structural perspective view of the present invention embodiment 4.

[0047] Figure 27 is an elevation view of the present invention embodiment 4.

[0048] Figure 28 is a plan view of the present invention embodiment 4.

[0049] Figure 29 is a structural perspective view of the present invention embodiment 5.

[0050] Figure 30 is another structural perspective view of the present invention embodiment 5.

[0051] Figure 31 is an elevation view of the present invention embodiment 5.

[0052] Figure 32 is a plan view of the present invention embodiment 5.

[0053] Figure 33 is a structural perspective view of the rack in the present invention embodiment 5. DETAILED DESCRIPTION

[0054] The present invention is further described below in conjunction with the accompanying drawings of a pneumatic pump ecological dredging system.

[0055] Embodiment 1, see attached Figures 1-11The invention discloses an ecological dredging system with pneumatic pump, which comprises a frame 30 placed on the bottom of water, a soil breaking device 20 placed near the middle of the frame 30 and a pneumatic pump. The pneumatic pump comprises three tank-like pump bodies 15 placed at the front end of the frame 30, a first mud inlet 11 arranged at the bottom of the pump body 15, a second mud inlet 12 placed behind the soil breaking device 20 and a hose 14 connecting the pump body 15 and the second mud inlet 12. During the dredging operation, the frame 30 drives the pneumatic pump and the soil breaking device 20 to move forward to suck the silt.

[0056] The soil breaking device 20 comprises a reamer shaft 21 horizontally placed in the shaft hole 35 of the frame 30 and reamer teeth 22 radially and circumferentially distributed on the reamer shaft 21. The reamer shaft 21 is directly connected with a driving mechanism 26 through spline or coupling. Here, the driving mechanism 26 is a hydraulic pump, which drives the reamer shaft to rotate. Figure 3 During the dredging operation, the frame 30 moves forward to the left to dredge from the front view. The reamer shaft 21 rotates counterclockwise under the drive of the driving mechanism 26, which drives the reamer teeth 22 to cut and peel the bottom mud downward and backward. The peeled and fallen bottom mud moves to the direction of the second mud inlet 12 under the action of inertia.

[0057] In order to prevent the soil breaking action of the reamer teeth 22 from causing the hard bottom mud to spread in the water body and causing secondary pollution to the water body, the linear speed of the reamer teeth 22 at the maximum circumference is controlled to be less than the starting flow speed of the bottom mud in the water body during the rotation of the reamer teeth 22. The starting flow speed is determined by on-site sampling test. In addition, an isolation cover 25 is arranged above the reamer teeth 22 on the frame 30 to prevent the silt driven by the reamer teeth 22 from escaping from the space above the reamer shaft 21 to the surrounding water body, causing secondary pollution to the water body.

[0058] The reamer teeth 22 have a hollow cavity 23 inside, and an ultrasonic transducer 24 is arranged in the hollow cavity 23. At least a part of the outer surface of the ultrasonic transducer 24 is tightly attached to at least a part of the inner surface of the hollow cavity 23 to reduce the energy loss during the transmission of ultrasonic waves from the ultrasonic transducer 24 to the reamer teeth 22. The ultrasonic transducer 24 is connected to an ultrasonic generator on the water surface ship body through a cable (not shown in the figure). The ultrasonic frequency is continuously adjustable between 30KHz-100KHz to adapt to different types of bottom mud.

[0059] Two sleeves are fixedly arranged on the pump body 15 as first members 31.1, and two vertical columns are fixedly arranged on the frame 30 as second members 31.2. The second members 31.2 are inserted into the first members 31.1 to form a sliding pair 31, so that the pump body 15 can freely slide up and down relative to the frame 30.

[0060] The first mud inlet 11 is fixedly arranged at the bottom of the pump body 15, and the upper end of the first mud inlet 11 is open and communicated with the pump body 15, and the lower end is a cavity open at the front and bottom, so that the bottom mud under the water can enter the cavity of the first mud inlet 11 from the front and bottom of the first mud inlet 11, and then enter the pump body 15 through the upper end opening.

[0061] The second mud inlet 12 is arranged behind the soil breaking device 20, the upper end of the second mud inlet 12 is open and communicated with the pump body 15 through the hose 14, and the lower end is a cavity open at the front and bottom, so that the hard bottom mud loosened and broken by the soil breaking device 20 under the water can enter the cavity of the second mud inlet 12 from the front and bottom of the second mud inlet 12, and then enter the pump body 15 through the upper end opening and the hose 14.

[0062] The second mud inlet 12 is fixedly arranged in the vertical direction, and four pin shafts 34.2 are arranged on the second mud inlet 12, and four springs 34.1 are respectively sleeved on the four pin shafts 34.2; the rear end of the rack 30 is provided with four pin holes 34.3 in the vertical direction, and the four pin shafts 34.2 are respectively inserted into the four pin holes 43.3 to form a gap fit, and the four springs 34.1 together form a pressing mechanism 34, and the second mud inlet 12 is pressed into the bottom mud under the water by the rack 30 under the action of the spring 34.1 and the cooperation of the pin shaft 34.2 and the pin hole 34.3.

[0063] The working process of the pneumatic pump ecological dredging system in embodiment 1 is as follows.

[0064] When the dredging operation is performed, the rack 30 is lowered to the bottom of the water to dredge, and the first mud inlet 11 at the bottom of the pneumatic pump at the front end of the rack 30 is pressed into the soft mud on the surface layer of the bottom of the water under the action of the pump body 15 and its own gravity, so that the organic matter soil, floating mud, flowing mud and silt on the surface layer of the bottom of the water in the forward direction of the rack 30 are sucked into the pump body 15 through the first mud inlet 11 and discharged out of the water body, and the hard bottom mud under the water is exposed. Since the first mud inlet 11 can slide downward relative to the rack under the action of the pump body 15 and its own gravity, it can automatically adjust the sinking depth according to the thickness of the surface layer of the bottom of the water, so that it can ensure that the surface layer of the bottom of the water can be completely sucked and cleaned by the first mud inlet 11 regardless of the ups and downs of the surface layer of the bottom of the water, and the hard bottom mud under the water is exposed, so that the first mud inlet 11 cannot completely remove the flowing silt, and the reamer teeth 22 disturb the flowing silt to cause the phenomenon of spreading pollution to the water body.

[0065] The reamer teeth 22 located at the rear of the pneumatic pump rotate counterclockwise under the drive of the drive mechanism 26 to cut and peel the hard bottom mud exposed outside, while pushing the peeled and fallen bottom mud to the second mud inlet 12 at the rear. At the same time, the ultrasonic transducer 24 inside the reamer teeth 22 emits ultrasonic waves to help the reamer teeth 22 loosen and break the hard bottom mud through high-frequency vibration, which not only makes the hard bottom mud more loose and easier to flow, but also effectively prevents the hard bottom mud from adhering to the reamer teeth 22, thereby further reducing the resistance of the reamer teeth cutting into the mud and improving the working efficiency of the reamer teeth.

[0066] When the ultrasonic wave acts on the water body bottom mud, the ultrasonic vibration can cause a small displacement between the bottom mud particles, thereby destroying the connection between the bottom mud particles and promoting the dispersion and loosening of the bottom mud particles. In addition, the ultrasonic wave can also make the bottom mud particles more evenly dispersed in water, thereby accelerating the penetration of water and making the bottom mud more easily flow.

[0067] Moreover, when the ultrasonic wave acts on the water body between the bottom mud particles, cavitation occurs in the water body, producing a near-vacuum cavity. When the cavity is compressed and collapses by the ultrasonic wave, high-speed micro-jet and shock wave with tens of megapascal pressure are generated, causing the hard bottom mud to be impacted and broken or loosened.

[0068] In addition, the mineral and organic substances in the bottom mud will also undergo some changes in physical properties under the action of ultrasonic waves, thereby further promoting the loosening of the bottom mud particles. For example, ultrasonic waves can cause water molecules to decompose and recombine, forming hydrogen bond structures, which help to disperse and flow the bottom mud particles.

[0069] The second mud inlet 12 located at the rear end of the frame 30 slides downward along the vertically arranged pin hole 34.3 of the frame 30 under the action of the spring 34.1, and is always attached to the hard bottom surface reformed after being scraped by the lower edge of the reamer teeth 22. The loosened and broken hard bottom mud is sucked into the cavity inside the second mud inlet 12, and then enters the pump body 15 through the hose 14 to be discharged outside the water body.

[0070] Embodiment 2, see attached Figures 12-18 An ecological dredging system of a pneumatic pump, which is different from embodiment 1 in that: The pneumatic pump includes three flat and rectangular box-shaped pump bodies 15, and the first mud inlet 11 is fixedly arranged at the front of the pump body 15. The first mud inlet 11 is a hollow cavity with front and rear openings, and the rear end opening is connected to the pump body 15, and the front end opening extends into the water bottom mud to suck the mud.

[0071] Two sliders are fixedly installed on the pump body 15 as the first component 31.1. A first crossbeam 36 and a second crossbeam 37 are arranged sequentially from front to back on the frame 30. The gap between the two opposing inner walls of the first crossbeam 36 and the second crossbeam 37 forms a slide as the second component 31.2. The first component 31.1 is inserted into the second component 31.2 to form a sliding pair 31, so that the pump body 15 can slide freely up and down relative to the frame 30.

[0072] The clamping mechanism 31 consists of four vertically fixed pins 34.2 on the second mud inlet 12, four vertical pin holes 34.3 on the frame 30, and two cylinders 34.4 vertically arranged between the frame 30 and the second mud inlet 12. The four pins 34.2 are respectively inserted into the four pin holes 34.3 to form a clearance fit. Under the action of the cylinders 34.4, the second mud inlet 12 slides down along the four vertically arranged pin holes 34.3 on the frame 30, and always fits against the hard bottom surface that has been re-formed after being scraped by the lower edge of the reamer teeth 22.

[0073] The reamer shaft drive mechanism 26 is a submersible variable frequency motor directly connected to the reamer shaft.

[0074] The rest of the structure and operation are the same as in Example 1.

[0075] Example 3, see appendix Figures 19-24 A pneumatic pump ecological dredging system differs from Example 1 in that: Three tank-shaped pump bodies 15 are arranged at the rear end of the frame 30; a second mud inlet 12 is fixedly installed at the bottom of the pump body 15; The first mud inlet 11 is located in front of the soil breaking device 20, and the upper end of the first mud inlet 11 has an opening that connects to the pump body 15 through the hose 13.

[0076] Four pins 33.2 are vertically fixed on the first mud inlet 11, and four springs 33.1 are respectively sleeved on the four pins 33.2. The front end of the frame 30 has four pin holes 33.3 vertically. The four pins 33.2 are respectively inserted into the four pin holes 33.3 to form a clearance fit, and together with the four springs 33.1, they form a pressing device 33. Under the action of the springs 33.1 and the cooperation of the pins 33.2 and the pin holes 33.3, the first mud inlet 11 is pressed into the bottom mud by the frame 30.

[0077] The rest of the structure and operation are the same as in Example 1.

[0078] Example 4, see appendix Figures 25-28 A pneumatic pump ecological dredging system, which differs from Embodiment 3 in that: a second mud inlet 12 is fixedly installed at the front end of the pump body 15.

[0079] The remaining structure and operation are the same as in Example 3.

[0080] Embodiment 5, see attached Figures 29-33 A pneumatic pump ecological dredging system, different from Embodiment 1 is that: Three flat rectangular box-shaped pneumatic pump bodies 15 are fixedly arranged on the frame 30 above the soil breaking device 20; the first mud inlet 11 is arranged in front of the soil breaking device 20 and is communicated with the pump body 15 through the hose 13; the second mud inlet 12 is arranged behind the soil breaking device 20 and is communicated with the pump body 15 through the hose 14.

[0081] Four pin shafts 33.2 are fixedly arranged in the vertical direction on the first mud inlet 11, and four springs 33.1 are respectively sleeved on the four pin shafts 33.2; four pin holes 33.3 are vertically arranged at the front end of the frame 30, and the four pin shafts 33.2 are respectively inserted into the four pin holes 33.3 to form a gap fit, which, together with the four springs 33.1, constitutes a pressing device 33; the first mud inlet 11 is pressed into the bottom mud by the frame 30 under the action of the spring 33.1 and the cooperation of the pin shaft 33.2 and the pin hole 33.3.

[0082] The remaining structures and working modes are the same as Embodiment 1.

[0083] Although the present application is described in detail by using specific ways, it is clear to those skilled in the art that various changes can be made without departing from the intent and scope of the present application.

Claims

1. An ecological dredging system using a pneumatic pump, comprising a pneumatic pump placed underwater and a soil-breaking device (20), wherein the soil-breaking device (20) is connected to the pneumatic pump via a frame (30), characterized in that: The pneumatic pump includes at least one pump body (15) and a first mud inlet (11) and a second mud inlet (12) connected to the pump body (15). The first mud inlet (11) is located in front of the soil breaking device (20) and sucks the surface organic soil, floating mud, flowing mud and silt in front of the soil breaking device (20) into the pump body (15) and discharges them out of the water body, exposing the lower hard bottom mud. The soil breaking device (20) loosens and breaks the exposed lower hard bottom mud. The second mud inlet (12) is located behind the soil breaking device (20) and sucks the hard bottom mud that has been loosened and broken by the soil breaking device (20) into the pump body (15) and discharges it out of the water body.

2. The pneumatic pump ecological dredging system according to claim 1, characterized in that: While the soil breaking device (20) loosens and breaks the hard bottom mud, the soil breaking force drives the broken hard bottom mud to move towards the second mud inlet (12), and its movement speed is less than the starting flow velocity of the broken hard bottom mud in this water body.

3. The pneumatic pump ecological dredging system according to claim 1, characterized in that: The soil breaking device (20) includes a reamer shaft (21) mounted on a frame (30), a drive mechanism (26) directly connected to the reamer shaft, and reamer teeth (22) distributed radially around the reamer shaft (21). The reamer shaft (21) is horizontally arranged and its axis is perpendicular to the mud feeding direction. The reamer teeth (22) cut and push the silt towards the second mud inlet (12). The rotational linear velocity of the reamer teeth (22) at the maximum circumference is less than the starting flow velocity of the bottom mud to be removed.

4. The pneumatic pump ecological dredging system according to claim 3, characterized in that: The inside of the reamer tooth (22) is a hollow cavity (23), and an ultrasonic transducer (24) is installed inside the hollow cavity (23).

5. The pneumatic pump ecological dredging system according to claim 1, characterized in that: The pump body (15) is positioned above the soil breaking device (20); one end of the first mud inlet (11) is connected to the pump body (15) through a hose (13), and the other end extends downward into the silt in front of the soil breaking device (20); one end of the second mud inlet (12) is connected to the pump body (15) through a hose (14), and the other end extends to the bottom mud behind the soil breaking device (20).

6. The pneumatic pump ecological dredging system according to claim 1, characterized in that: The pump body (15) is provided with a first component (31.1) and the frame (30) is provided with a second component (31.2). The first component (31.1) and the second component (31.2) form a sliding pair to realize the vertical movement connection between the pump body (15) and the frame (30).

7. The pneumatic pump ecological dredging system according to claim 6, characterized in that: The pump body (15) is fixedly connected to the first mud inlet (11) in front of the soil breaking device (20); one end of the second mud inlet (12) is connected to the pump body (15) through the hose (14), and the other end extends to the bottom mud behind the soil breaking device (20).

8. The pneumatic pump ecological dredging system according to claim 6, characterized in that: The pump body (15) is fixedly connected to the second mud inlet (12) behind the soil breaking device (20); one end of the first mud inlet (11) is connected to the pump body (15) through a hose (13), and the other end extends downward into the silt in front of the soil breaking device (20).

9. The pneumatic pump ecological dredging system according to claim 5 or 8, characterized in that: A pressing device (33) is provided between the frame (30) and the first mud inlet (11) to press the first mud inlet (11) into the silt.

10. The pneumatic pump ecological dredging system according to claim 5 or 7, characterized in that: A pressing mechanism (34) is provided between the frame (30) and the second mud inlet (12) to press the second mud inlet (12) into the bottom mud.

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