CN111719617B - Device and method for dredging underwater bottom mud in sealing mode - Google Patents
Device and method for dredging underwater bottom mud in sealing mode Download PDFInfo
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- CN111719617B CN111719617B CN202010587716.1A CN202010587716A CN111719617B CN 111719617 B CN111719617 B CN 111719617B CN 202010587716 A CN202010587716 A CN 202010587716A CN 111719617 B CN111719617 B CN 111719617B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
- E02F3/9268—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements
- E02F3/9275—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements with axis of rotation parallel to longitudinal axis of the suction pipe
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Abstract
The invention discloses a closed dredging device for underwater silt, which comprises a cylindrical dredging bin, wherein an opening is formed in the bottom of the dredging bin and is inserted into underwater silt, a sealing top cover is arranged at the top of the dredging bin, a hole is formed in the top cover and is connected with a pipeline, the opening of the pipeline is higher than the water surface, and a circular silt collecting tank surrounded by coamings is arranged in the center of the inside of the dredging bin; the top of the sludge collecting tank is communicated with a pipeline, and a sludge conveying device is arranged in the pipeline; a plurality of fan-shaped grooves separated by a groove dividing plate are arranged on the outer side of the sludge collecting tank; a collection port communicated with the sludge collection tank and the fan-shaped grooves is formed in each fan-shaped groove, and a mud scraping plate is arranged in each fan-shaped groove; the mud scraping plate moves mud scraping along the radial direction to the mud collecting tank, and water bottom mud is sent into the mud collecting tank through the collecting port; and a sludge conveying device in the pipeline conveys the sludge in the sludge collecting tank into sludge collecting equipment on the water surface. The invention also provides a closed dredging method for the underwater silt. The invention effectively prevents secondary pollution to the water body in the dredging process.
Description
Technical Field
The invention belongs to the technical field of hydraulic engineering, relates to a dredging device and a dredging method for water bottom pollution sediment of river, lake and reservoir, and the like, and particularly relates to a water bottom sediment sealing dredging device and a dredging method.
Background
At present, sediment is taken as sediment of a river Hu Hai and is an important component of a natural water area, however, when a water body is polluted, a part of pollutant in the water can be absorbed on the particulate matters or automatically precipitated and further accumulated in the sediment to become polluted sediment. The polluted substrate sludge is a potential source of pollution for lakes. When the lake environment changes, the nutrient salts in the bottom mud can be released again, and secondary pollution is caused to the bottom mud. Research shows that when the external pollution source of the lake is controlled, the sediment can become the primary pollution source, and the seasonal nutrient salt release can maintain the eutrophication state for decades; according to the report of the related literature, the endogenous pollution load of Hangzhou western lake reaches 41% of the exogenous pollution load; the endogenous pollution load of the Anhui nest lake is 21% of the exogenous load; while 80% of nitrogen and 90% of phosphorus in Yunnan pond are distributed in the sediment. An effective measure for treating the polluted substrate sludge is substrate sludge dredging, namely, the pollutant release of the substrate sludge is reduced by digging out the polluted substrate sludge on the surface layer, the mode can reduce the substrate sludge pollution source in the lake, the lake capacity can be increased, and the growth of aquatic plants is controlled, for example: after removing 1m thick sediment on the surface layer of Trummen lake in Sweden, the water depth is increased by 1.1-1.7m, the TP (total phosphorus) concentration is rapidly reduced, and 18 years are maintained; the dredging sediment of the Yunnan Chi Caohai project in one period of China is 400 ten thousand m, after the project is implemented, the water body in the dredging area is no longer black and odorous, the water quality is obviously improved, and the transparency of the water body is improved to 0.8m from the original value of less than 0.37 m.
At present, the main tool for dredging the sediment is a modern dredger, and the problems of resuspension of the polluted sediment, reduced transparency of the water body, diffusion of high-concentration organic matters in the sediment and interstitial water, secondary pollution and the like are possibly caused in the dredging process.
Disclosure of Invention
The invention provides a device and a method for dredging underwater bottom mud in a sealing way, which are used for solving the technical problems in the prior art, realizing efficient and rapid dredging and reducing secondary pollution to a water body in the dredging process.
The invention adopts the technical proposal for solving the technical problems in the prior art that: the closed dredging device for the underwater silt comprises a cylindrical dredging bin, wherein an opening is formed in the bottom of the dredging bin and is inserted into the underwater silt, a sealed top cover is arranged at the top of the dredging bin, a hole is formed in the top cover, a pipeline is connected to the hole in a sealing manner, the pipeline opening is higher than the water surface, and a circular silt collecting tank surrounded by enclosing plates is arranged in the center in the dredging bin; the top of the sludge collecting tank is communicated with a pipeline, and a sludge conveying device is arranged in the pipeline; a plurality of fan-shaped grooves separated by a groove dividing plate are arranged on the outer side of the sludge collecting tank; a collection port communicated with the sludge collection tank and the fan-shaped grooves is formed between the sludge collection tank and each fan-shaped groove, and a mechanically driven mud scraping plate is arranged in each fan-shaped groove; the mud scraping plate moves mud scraping along the radial direction to the mud collecting tank, and water bottom mud is sent into the mud collecting tank through the collecting port; a sludge conveying device in the pipeline for conveying sludge in the sludge collecting tank into sludge collecting equipment on the water surface; the initial position of the mud scraping plate is arranged at the side wall close to the dredging bin, a telescopic pressure head is arranged on the top cover and above the initial position of the mud scraping plate, and the telescopic pressure head is used for pressing the mud scraping plate into mud and adjusting the depth of the mud scraping plate inserted into the mud; the dredging device also comprises a drainage device, wherein the drainage device is used for draining water in the dredging bin.
Further, the sludge conveying device comprises a sludge pump and a sludge pipe connected with the sludge pump, and the sludge pump pumps the sludge in the sludge collecting tank and conveys the sludge into the sludge collecting equipment on the water surface through the sludge pipe.
Further, the sludge conveying device comprises a lifting machine, and the lifting machine is provided with a feed inlet; and a guide groove is arranged between the collecting opening and the feeding opening, and the sludge is collected to the feeding opening of the elevator through the guide groove.
Further, the elevator is a bucket elevator.
Further, the elevator is a TD type belt type bucket elevator, an NE type belt type bucket elevator, an HL type loop chain centrifugal bucket elevator or a Z type bucket elevator.
Further, the elevator is a screw elevator.
Further, the sludge conveying device comprises a sludge pump and a lifting machine, and the lifting machine is provided with a feed inlet; the output port of the sludge pump is connected with a pipeline, the output port of the pipeline is positioned above the feed inlet of the elevator, and the sludge in the sludge collecting tank is conveyed to the feed inlet of the elevator through the sludge pump.
Further, the side wall of the dredging bin is surrounded by iron plates, and the diameter of the dredging bin is 30-50 m.
Further, the mud scraping plate is an arc mud scraping plate which is elastically bent and deformed; the length before deformation is less than or equal to the outer arc length of the fan-shaped groove.
The invention also provides a water bottom silt closed dredging method by using the water bottom silt closed dredging device, which comprises the following steps:
step one, conveying a dredging bin to a designated place, and inserting the bottom of the dredging bin into sludge; installing a sludge conveying device;
step two, starting a drainage device to drain water in the dredging bin;
driving the mud scraping plate to collect the sludge in the fan-shaped groove into a sludge collecting tank;
and step four, conveying the sludge in the sludge collecting tank into sludge collecting equipment on the water surface through a sludge conveying device.
The invention has the advantages and positive effects that: the invention utilizes the dredging bin, the top cover, the groove separating plate and the like to realize the region division and the sealing of the polluted bottom mud at the bottom of the reservoir, utilizes the arched mud scraping plate to realize the effective movement in the fan-shaped groove, utilizes the mud collecting tank and the pipeline to realize the collection and the treatment of the polluted bottom mud, has quick and efficient whole process, and once the dredging bin is inserted into the bottom riverbed, the water body outside the device is not influenced by the dredging process of the bottom mud, and effectively prevents the secondary pollution of the dredging process to the water body.
Drawings
FIG. 1 is a schematic diagram of a closed dredging device for underwater silt;
FIG. 2 is a schematic view of a fan-shaped groove and a mud scraper in a dredging bin according to the invention.
In the figure, 1, a dredging bin; 2. a top cover; 3. a fan-shaped groove; 4. an arcuate scraper; 5. a slotted plate; 6. a sludge collecting tank; 7. a pipe; 8. a water bottom silt; 9. a bottom river bed.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
referring to fig. 1 to 2, a water bottom silt sealing dredging device comprises a cylindrical dredging bin 1, wherein the bottom of the dredging bin 1 is provided with an opening, the opening is inserted into water bottom silt 8, the top of the dredging bin 1 is provided with a sealed top cover 2, the top cover 2 is provided with a hole, a pipeline 7 is connected at the hole in a sealing way, the opening of the pipeline 7 is higher than the water surface, and the center in the dredging bin 1 is provided with a circular silt collecting tank 6 surrounded by coamings; the top of the sludge collecting tank 6 is communicated with a pipeline 7, and a sludge conveying device is arranged in the pipeline 7; a plurality of fan-shaped grooves 3 separated by a groove dividing plate 5 are arranged on the outer side of the sludge collecting tank 6; a collection port communicated with the sludge collection tank 6 and the fan-shaped grooves 3 is formed between the sludge collection tank and each fan-shaped groove 3 is internally provided with a mechanically driven scraping plate; the mud scraping plate moves to the mud collecting tank 6 along the radial direction to scrape mud, and the underwater mud 8 is sent into the mud collecting tank 6 through a collecting port; a sludge conveying device in the pipeline 7 for conveying the sludge in the sludge collecting tank 6 to a sludge collecting device on the water surface; the initial position of the mud scraping plate is arranged at the side wall close to the dredging bin 1, a telescopic pressure head is arranged on the top cover 2 and above the initial position of the mud scraping plate, and the telescopic pressure head is used for pressing the mud scraping plate into mud and adjusting the depth of the mud scraping plate inserted into the mud; and the dredging device also comprises a drainage device which is used for draining the water in the dredging bin 1.
The height of the dredging bin 1 is determined according to the depth of dredging as required. The mechanical drive may be hydraulic, pneumatic or motor driven. For example, a hydraulic cylinder, an air cylinder or an electric cylinder driven by a motor and the like are adopted to drive the mud scraping plate to scrape mud.
The telescopic pressure head can be driven by an electric push rod and the like, and the telescopic length is adjustable.
The mud scraping plate can be driven to scrape mud by a hydraulic cylinder, an air cylinder or an electric cylinder driven by a motor, and the like, so that the mud scraping plate can reciprocate along the radial direction of the dredging bin 1. The electric push rod can be arranged on the top cover 2 and above the initial position of the mud scraping plate, the pressure head is arranged at the front end of the electric push rod to form a telescopic pressure head, the electric push rod is driven to press the mud scraping plate into mud, and the depth of the mud scraping plate inserted into the mud can be adjusted. So that the sludge is inserted into the reactor for about 5 to 6cm each time.
The drainage device can be provided with a water pump and a drainage pipe communicated with the water pump, and water in the dredging bin 1 is discharged to the outside of the dredging bin 1 through the drainage pipe.
The sludge transporting apparatus may include a sludge pump and a sludge pipe connected to the sludge pump, and the sludge pump pumps the sludge in the sludge collecting tank 6 and transports the sludge to the sludge collecting device on the water surface through the sludge pipe.
The silt conveying device can also comprise a lifting machine, and the lifting machine is provided with a feed inlet; a guide groove can be arranged between the collecting opening and the feeding opening, and the sludge is collected to the feeding opening of the elevator through the guide groove. The elevator can vertically or obliquely lift the sludge and the like onto the water surface.
The hoist may be a bucket hoist. For example, the elevator can be a TD type belt type bucket elevator, an NE type plate chain type bucket elevator, an HL type loop chain centrifugal bucket elevator or a Z type bucket elevator. The elevator may also be a screw elevator.
The sludge conveying device can also comprise a sludge pump and a lifting machine, and the lifting machine is provided with a feed inlet; the output port of the sludge pump is connected with a pipeline, the output port of the pipeline can be positioned above the feed inlet of the elevator, and the sludge in the sludge collecting tank 6 is conveyed to the feed inlet of the elevator through the sludge pump. And then the sludge is conveyed into sludge collecting equipment on the water surface through a lifting machine.
The sludge collecting equipment on the water surface can be provided with a receiving opening, the receiving opening can be in butt joint with a discharge opening or an output opening of the sludge conveying device, the sludge collecting equipment can be provided with a conveying belt, and the conveying belt can convey sludge to a cabin and the like.
The side wall of the dredging bin 1 can be surrounded by iron plates, and the diameter can be 30-50 m.
The mud scraping plate can be an arc mud scraping plate 4 which is elastically bent and deformed; the length before deformation can be less than or equal to the outer arc length of the fan-shaped groove 3. The arched mud scraping plate 4 can be driven by a hydraulic cylinder, an air cylinder or an electric cylinder driven by a motor to push the mud in the fan-shaped groove 3 into the mud collecting tank 6.
The dredging bin 1, the TD type belt type bucket elevator, the NE type plate chain type bucket elevator, the HL type loop chain centrifugal bucket elevator, the Z type bucket elevator, the spiral elevator, the arched mud scraping plate 4, the groove separating plate 5, the mud pump, the hydraulic cylinder, the air cylinder, the electric push rod, the telescopic pressing head and other devices and structures can be manufactured, installed and driven and controlled by adopting the conventional technical means.
The invention also provides an embodiment of a water bottom silt closed dredging method by utilizing the water bottom silt closed dredging device, which comprises the following steps:
step one, conveying a dredging bin 1 to a designated place, and inserting the bottom of the dredging bin 1 into sludge; installing a drainage device, a sludge conveying device and a mud scraping plate; the dredging bin 1 is floated and transported to a designated place through a ship or an air cushion and the like, the dredging bin 1 is sunk, and after the bottom of the dredging bin 1 is inserted with sludge, the sludge in a dredging range is sealed; and a drainage device, a sludge conveying device, a mud scraping plate and the like are arranged in place.
And secondly, starting a drainage device to drain the water in the dredging bin 1.
Driving a mud scraping plate to collect sludge in the fan-shaped groove 3 into a sludge collecting tank 6; the mud scraping plates are driven by a hydraulic cylinder, an air cylinder or an electric cylinder driven by a motor to scrape mud, and mud in each fan-shaped groove 3 is pushed to the direction of the mud collecting tank 6, so that the mud is gradually scraped into the mud collecting tank 6.
And step four, conveying the sludge in the sludge collecting pond 6 into sludge collecting equipment on the water surface through a sludge conveying device. And the collected sludge is completely conveyed out through a pipeline 7 by adopting a sludge conveying device, so that dredging is completed.
After dredging is completed, the dredging bin 1 and other devices can float upwards from the sludge by adopting buoyancy generated by air cushion inflation, or the dredging bin 1 and the like can be lifted by adopting a lifting method and transported to the next dredging place.
The working principle of the invention is further illustrated in the following by a preferred embodiment of the invention:
the utility model provides a sealed dredging device of submarine silt, includes cylinder dredging bin 1, dredging bin 1's bottom opening inserts in submarine silt 8, dredging bin 1's top is equipped with sealed top cap 2, opens the hole on the top cap 2, and sealing connection has pipeline 7 in this drill way department, and pipeline 7 mouth is higher than the surface of water, and dredging bin 1 internal center department is equipped with circular silt collection tank 6 that is enclosed by the bounding wall; the top of the sludge collecting tank 6 is communicated with a pipeline 7, and a sludge conveying device is arranged in the pipeline 7; a plurality of fan-shaped grooves 3 separated by a groove dividing plate 5 are arranged on the outer side of the sludge collecting tank 6; a collection port communicated with the sludge collection tank 6 and the fan-shaped grooves 3 is formed between the sludge collection tank and each fan-shaped groove 3, and a mechanically driven arched scraper 4 is arranged in each fan-shaped groove 3; the mud scraping plate is an arc mud scraping plate 4 which is elastically bent and deformed; the mud scraping plate sends the underwater silt 8 into the silt collecting tank 6 through a collecting port; a sludge conveying device in the pipeline 7 for conveying the sludge in the sludge collecting tank 6 to a sludge collecting device on the water surface; and the dredging device also comprises a drainage device which is used for draining the water in the dredging bin 1. The drainage device can comprise a submersible pump, a centrifugal pump and other drainage pipes and a drainage pipe connected with the drainage pump, and the water in the dredging bin 1 is discharged out of the dredging bin 1 through the drainage pipe.
The dredging bin 1 is formed by encircling a steel plate into a cylinder shape, the diameter is 30-50 m, an underwater dredging area is arranged in the dredging bin, and the height is determined according to the depth of dredging required; when the dredging device works, the bottom of the dredging bin 1 is integrally inserted into sludge, so that a circular closed dredging area is divided; a top cover 2 is arranged at the top of the dredging bin 1 and completely covers the closed dredging area, and a round hole is formed in the middle of the top cover 2 and is connected with a pipeline 7; a plurality of groove dividing plates 5 are arranged in a closed dredging area surrounded by the dredging bin 1, and the dredging area is divided into 8-10 fan-shaped grooves 3; a water pumping and draining device is arranged in each fan-shaped groove 3 and is used for draining water in the dredging bin 1; an arched mud scraping plate 4 is arranged inside each fan-shaped groove 3; the arched mud scraping plate 4 has the characteristic of elastic deformation, the shape of the arched mud scraping plate is changeable in the mud scraping process so as to adapt to the width change of the fan-shaped groove 3, and the depth of the groove dividing plate 5 is determined according to the depth of the water bottom mud 8 required to be dredged; the arched mud scraping plate 4 scrapes water bottom mud 8 in the fan-shaped groove 3 into the mud collecting tank 6 in the middle through mechanical driving; the water and sludge in the sludge collection tank 6 are discharged through a pipe 7.
A closed dredging method for underwater silt comprises the following steps:
firstly, floating devices such as a dredging bin 1 to a designated place, floating the dredging bin 1 to the designated place through a ship or an air cushion and the like, sinking the dredging bin 1, and sealing the sludge in a dredging range after the bottom of the dredging bin 1 is inserted with the sludge; and a drainage device, a sludge conveying device, a mud scraping plate and the like are arranged in place. And water in the dredging bin 1 is discharged by adopting a drainage device.
The height of the arched mud scraping plate 4 in the fan-shaped groove 3 can be adjusted to enable the arched mud scraping plate 4 to be inserted into sludge for 5cm, the arched mud scraping plate 4 is driven to move towards the sludge collecting tank 6, and after one-time mud scraping is completed, the mud scraping plate is enabled to return to the position near the side wall of the dredging bin 1, namely the initial position; the height of the arched scraper 4 can be adjusted again to insert 5cm of mud, and the mud scraping operation is repeated until the specified dredging depth is reached. During this time, the sludge in the sludge collection tank 6 is transported out through the pipe 7. After reaching the specified dredging depth, the sludge in the sludge collecting tank 6 is totally output. After dredging is completed, the dredging bin 1 and other devices can float upwards from the sludge by adopting buoyancy generated by air cushion inflation, or the dredging bin 1 and the like can be lifted by adopting a lifting method and transported to the next dredging place.
In this example, the total dredging depth is 0.5m; the coaming of the dredging bin 1 is inserted into the depth of 1m below the surface of the bottom river bed 9, the diameter of the enclosed dredging area is 50m, and the height of the cylinder wall is 2m; a total of 8 slotted plates 5 divide the whole cylinder into 8 sector slots 3; the diameter of the pipe 7 is 2m.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (9)
1. The closed dredging device for the underwater silt is characterized by comprising a cylindrical dredging bin, wherein an opening is formed in the bottom of the dredging bin and is inserted into the underwater silt, a sealing top cover is arranged at the top of the dredging bin, an orifice is formed in the top cover, a pipeline is connected to the orifice in a sealing manner, the pipeline orifice is higher than the water surface, and a circular silt collecting tank surrounded by enclosing plates is arranged in the center of the inside of the dredging bin; the top of the sludge collecting tank is communicated with a pipeline, and a sludge conveying device is arranged in the pipeline; a plurality of fan-shaped grooves separated by a groove dividing plate are arranged on the outer side of the sludge collecting tank; a collection port communicated with the sludge collection tank and the fan-shaped grooves is formed between the sludge collection tank and each fan-shaped groove, and a mechanically driven mud scraping plate is arranged in each fan-shaped groove; the mud scraping plate moves mud scraping along the radial direction to the mud collecting tank, and water bottom mud is sent into the mud collecting tank through the collecting port; a sludge conveying device in the pipeline for conveying sludge in the sludge collecting tank into sludge collecting equipment on the water surface; the initial position of the mud scraping plate is arranged at the side wall close to the dredging bin, a telescopic pressure head is arranged on the top cover and above the initial position of the mud scraping plate, and the telescopic pressure head is used for pressing the mud scraping plate into mud and adjusting the depth of the mud scraping plate inserted into the mud; the dredging device is used for dredging the dredging bin; the mud scraping plate is an arc mud scraping plate which is elastically bent and deformed; the length before deformation is less than or equal to the outer arc length of the fan-shaped groove.
2. The underwater silt closing dredging apparatus as claimed in claim 1, wherein the silt transporting means comprises a silt pump and a silt pipe connected to the silt pump, and the silt pump pumps the silt in the silt collecting pond and transports the silt to the silt collecting equipment on the water surface through the silt pipe.
3. The underwater silt sealing dredging device according to claim 1, wherein the silt conveying device comprises a lifter provided with a feed inlet; and a guide groove is arranged between the collecting opening and the feeding opening, and the sludge is collected to the feeding opening of the elevator through the guide groove.
4. A water bottom silt closing dredging apparatus according to claim 3, wherein the lifting machine is a bucket lifting machine.
5. The underwater silt sealing dredging apparatus of claim 4, wherein the elevator is a TD-type belt bucket elevator, NE-type plate chain bucket elevator, HL-type loop chain centrifugal bucket elevator or Z-type bucket elevator.
6. A water bottom silt closing dredging apparatus according to claim 3, wherein the lifting machine is a screw lifting machine.
7. The underwater silt sealing dredging device according to claim 1, wherein the silt conveying device comprises a silt pump and a lifting machine, and the lifting machine is provided with a feed inlet; the output port of the sludge pump is connected with a pipeline, the output port of the pipeline is positioned above the feed inlet of the elevator, and the sludge in the sludge collecting tank is conveyed to the feed inlet of the elevator through the sludge pump.
8. The underwater silt sealing dredging device according to claim 1, wherein the side wall of the dredging bin is surrounded by iron plates, and the diameter of the dredging bin is 30-50 m.
9. A method of dredging a water bottom silt closure using a water bottom silt closure dredging apparatus as claimed in any one of claims 1 to 8, the method comprising the steps of:
step one, conveying a dredging bin to a designated place, and inserting the bottom of the dredging bin into sludge; installing a sludge conveying device;
step two, starting a drainage device to drain water in the dredging bin;
driving the mud scraping plate to collect the sludge in the fan-shaped groove into a sludge collecting tank;
and step four, conveying the sludge in the sludge collecting tank into sludge collecting equipment on the water surface through a sludge conveying device.
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| CN202010587716.1A CN111719617B (en) | 2020-06-24 | 2020-06-24 | Device and method for dredging underwater bottom mud in sealing mode |
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| CN202010587716.1A CN111719617B (en) | 2020-06-24 | 2020-06-24 | Device and method for dredging underwater bottom mud in sealing mode |
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| CN113045173A (en) * | 2020-10-26 | 2021-06-29 | 无锡德林海环保科技股份有限公司 | Trap type sludge in-situ treatment device and method |
| CN115288229B (en) * | 2022-09-05 | 2023-12-01 | 天津大学 | Closed disturbance-free dredging system and dredging method |
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| CN110130430A (en) * | 2019-04-04 | 2019-08-16 | 浙江天姥建设发展有限公司 | Channel cleanout device with agitating function |
| CN110185081A (en) * | 2019-07-08 | 2019-08-30 | 毅康科技有限公司 | A kind of rubbish silt displacement mechanism for river regulation |
| CN212427290U (en) * | 2020-06-24 | 2021-01-29 | 天津大学 | Underwater bottom mud closed dredging device |
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