CN112225345A - In-situ dredging system for urban black and odorous river channel and disposal method thereof - Google Patents
In-situ dredging system for urban black and odorous river channel and disposal method thereof Download PDFInfo
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- CN112225345A CN112225345A CN202010993892.5A CN202010993892A CN112225345A CN 112225345 A CN112225345 A CN 112225345A CN 202010993892 A CN202010993892 A CN 202010993892A CN 112225345 A CN112225345 A CN 112225345A
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000010802 sludge Substances 0.000 claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 239000003814 drug Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 11
- 230000007613 environmental effect Effects 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 239000008394 flocculating agent Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 14
- 239000004746 geotextile Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920001661 Chitosan Polymers 0.000 claims description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000005188 flotation Methods 0.000 claims 6
- 230000003137 locomotive effect Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 230000018044 dehydration Effects 0.000 abstract description 9
- 238000006297 dehydration reaction Methods 0.000 abstract description 9
- 238000007596 consolidation process Methods 0.000 abstract description 5
- 238000004904 shortening Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- E02F3/8833—Floating installations
- E02F3/885—Floating installations self propelled, e.g. ship
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the field of ecological management and environmental protection, and discloses an in-situ dredging system for urban black and odorous riverways, which comprises an environment-friendly cutter suction ship, a floating barrel type working platform arranged on the riverway and a vehicle-mounted medicament integrated adding and mixing device arranged at the bank, wherein a plurality of steel grid filter units are paved on the floating barrel type working platform, filter materials are filled in the steel grid filter units, the vehicle-mounted medicament integrated adding and mixing device is connected with the environment-friendly cutter suction ship through a sludge inlet pipe, a soil engineering pipe bag is connected through a sludge outlet pipe, and the soil engineering pipe bag is paved above the steel grid filter units. The invention also discloses a disposal method of the urban black and odorous river channel in-situ dredging system. The in-situ dredging system for the urban black and odorous river channel and the disposal method thereof realize the rapid removal, dehydration and consolidation of the black and odorous sludge in the river channel on the premise of shortening the sludge conveying distance and not imposing land on centralized sludge treatment.
Description
Technical Field
The invention relates to the field of ecological management and environmental protection, in particular to an in-situ dredging system for an urban black and odorous river and a disposal method thereof.
Background
The expansion of cities and the continuous enhancement of human activities lead to the discharge of a large amount of pollutants into rivers and the deposition of the pollutants into bottom mud, which not only causes the serious problem of river channel siltation, but also aggravates the endogenous pollution of the river channels, and poses serious threats to the improvement of urban water environment and the health of ecological systems.
River sediment is removed by dredging the river channel by a mechanical means, the problem of endogenous pollution is solved while the overflowing capacity of the river channel is enhanced, and the method has important significance for improving the flood control and drainage capacity of the urban river channel and improving the urban water environment.
At present, however, in urban river dredging and sludge treatment, river sludge is conveyed to a centralized disposal site to be subjected to ex-situ treatment such as dehydration and consolidation by mainly adopting a mode of firstly dredging and then treating. This approach has the following problems: 1) the long-distance conveying of the sludge has the risk of secondary environmental pollution; 2) under the background of the shortage of urban land, the coordination of the land for sludge centralized treatment is difficult.
Therefore, how to shorten the bottom sediment conveying distance and reduce centralized disposal collection land in the process of implementing bottom sediment desilting and disposal of the urban black and odorous river channel is an important problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide an in-situ dredging system for an urban black and odorous river channel and a disposal method thereof, aiming at overcoming the defects of the prior art, and realizing the rapid removal, dehydration and consolidation of the black and odorous sludge in the river channel on the premise of shortening the sludge conveying distance and not imposing land on centralized sludge treatment.
In order to achieve the purpose, the in-situ dredging system for the urban black and odorous river comprises an environment-friendly cutter suction ship, a floating barrel type working platform arranged on the river and a vehicle-mounted medicament integrated adding and mixing device arranged on the bank side, wherein a plurality of steel grid filter units are paved on the floating barrel type working platform, filter materials are filled in the steel grid filter units, the vehicle-mounted medicament integrated adding and mixing device is connected with the environment-friendly cutter suction ship through a sludge inlet pipe and connected with a geotube bag through a sludge outlet pipe, the geotube bag is paved above the steel grid filter units, the vehicle-mounted medicament integrated adding and mixing device comprises a mobile vehicle, a sludge reactor connected with the sludge inlet pipe is arranged on the mobile vehicle, the bottom of the sludge reactor is connected with the sludge outlet pipe, and a flocculating agent storage tank is further arranged on the mobile vehicle, the flocculating agent storage tank pass through screw conveyer with the silt reactor is connected, be equipped with the mixer in the silt reactor, be equipped with the force (forcing) pump on the play mud pipe, filtering material includes cobble and active carbon, active carbon lays in the steel grid filter unit, the particle diameter is 8 ~ 12 meshes, lays high 1 ~ 1.5cm, the cobble is laid on the active carbon, the cobble diameter is 3 ~ 5 cm.
Preferably, the buoy type working platform is formed by assembling a plurality of buoys, the buoys are connected through short connecting bolts, and the steel grid filtering unit is fixedly installed on the buoy type working platform through the long connecting bolts.
Preferably, the pontoon type working platform is formed by splicing double-layer pontoons, the height of the double-layer pontoon in the pontoon type working platform is 600-800 mm, the maximum load is 600-800 kg/m2, the cross section of the pontoon is square, the four corners are in arc obtuse angle shape, and each 1 square meter of the pontoon type working platform is provided with 8 pontoons.
Preferably, the steel grid filtering unit is a cuboid with the side length of 1-1.5 m and the height of 5-6 cm, the steel grid filtering unit is a hot-dip galvanized steel grid, and the size of a sieve mesh is 10-14 meshes.
Preferably, the size of the geotextile tube bag is a square with the side length of 1-1.5 m, the equivalent aperture of the geotextile tube bag is 0.2-0.6 mm, the permeability is not less than 20L/m2/s, the tensile strength of a seam is not less than 70kN/m, the filling height is not more than 0.45m, and the geotextile tube bag is woven by high-toughness polypropylene yarns.
Preferably, the flocculating agent in the flocculating agent storage tank is chitosan and poly ferric chloride, and the addition amount of the flocculating agent is 0.1-0.5% of the mass of the slurry in the sludge reactor.
A disposal method of the urban black and odorous river channel in-situ dredging system comprises the following steps:
(1) building the buoy type working platform on a river channel to be desilted;
(2) the steel grid filtering unit is arranged on the floating barrel type working platform and is filled with filtering materials consisting of pebbles and activated carbon;
(3) laying the geotechnical pipe bag on the steel grid filtering unit;
(4) the environment-friendly cutter suction ship is used for sending slurry into the vehicle-mounted type integrated agent adding and mixing device through the slurry inlet pipe, adding a flocculating agent, uniformly mixing, and sending the slurry to the geotechnical pipe bag through the slurry outlet pipe, wherein the vehicle-mounted type integrated agent adding and mixing device is located on the bank side of the river, and the filling height of the geotechnical pipe bag is not more than 0.45 m;
(5) after the geotextile tube bags are filled, the self weight of slurry in the geotextile tube bags is utilized for solidification, sedimentation and draining, and outlet water in the geotextile tube bags flows into a river channel after being filtered and purified by the filter material, so that secondary pollution is avoided;
(6) and after the sludge in the geotechnical tube bag reaches the target of designed water content, the sludge is transported to the outside for landfill, incineration or greening and the like.
Compared with the prior art, the invention has the following advantages:
1. by constructing the float-type working platform on the river channel to be desilted as a sludge consolidation and dehydration site, the problem that a centralized sludge disposal site is difficult to build in an urban area is solved, the conveying distance of desilting slurry is shortened, and secondary pollution to the environment is effectively avoided;
2. adopt the geotechnological tube bag to carry out silt dehydration and concretion silt, avoid the environmental pollution problem that the silt sunning caused, and compare mechanical dehydration, can reduce the cost that the river course desilting was dealt with.
Drawings
FIG. 1 is a schematic structural diagram of an in-situ dredging system for urban black and odorous riverways;
FIG. 2 is a schematic view of the integrated adding and mixing device for vehicle-mounted medication in FIG. 1;
FIG. 3 is a schematic structural view of the pontoon-type work platform shown in FIG. 1;
FIG. 4 is a schematic view of the geotextile tube bag placed on a buoy type working platform according to the present invention;
fig. 5 is a schematic structural diagram of the steel mesh filter unit in fig. 1.
The components in the figures are numbered as follows:
the environment-friendly cutter suction vessel comprises an environment-friendly cutter suction vessel 1, a river channel 2, a floating drum type working platform 3, a vehicle-mounted medicament integrated adding and mixing device 4, a steel grid filtering unit 5, a mud inlet pipe 6, a mud outlet pipe 7, a soil engineering pipe bag 8, a moving vehicle 9, a sludge reactor 10, a flocculating agent storage tank 11, a spiral conveyor 12, a stirrer 13, a pressure pump 14, pebbles 15, activated carbon 16, a floating drum 17, a short connecting bolt 18 and a long connecting bolt 19.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, 2, 3 and 4, the in-situ dredging system for the urban black and odorous river comprises an environment-friendly cutter suction ship 1, a floating barrel type working platform 3 arranged on the river 2 and a vehicle-mounted medicament integrated adding and mixing device 4 arranged at the bank side, wherein a plurality of steel grid filtering units 5 are paved on the floating barrel type working platform 3, filtering materials are filled in the steel grid filtering units 5, the vehicle-mounted medicament integrated adding and mixing device 4 is connected with the environment-friendly cutter suction ship 1 through a sludge inlet pipe 6, a soil pipe bag 8 is connected through a sludge outlet pipe 7, and the soil pipe bag 8 is paved above the steel grid filtering units 5.
In addition, as shown in fig. 2, the vehicle-mounted integrated chemical adding and mixing device 4 comprises a moving vehicle 9, a sludge reactor 10 connected with the sludge inlet pipe 6 is arranged on the moving vehicle 9, a sludge outlet pipe 7 is connected to the bottom of the sludge reactor 10, a flocculant storage tank 11 is further arranged on the moving vehicle 9, the flocculant storage tank 11 is connected with the sludge reactor 10 through a screw conveyor 12, a stirrer 13 is arranged in the sludge reactor 10, and a pressure pump 14 is arranged on the sludge outlet pipe 7.
In this embodiment, as shown in fig. 4, the filter material includes pebbles 15 and activated carbon 16, the activated carbon 16 is laid in the steel grid filter unit 5, the particle size is 10 meshes, the laying height is 1.5cm, the pebbles 15 are laid on the activated carbon 16, and the diameter of the pebbles 15 is 4 cm.
As shown in fig. 3, the pontoon type working platform 3 is formed by splicing pontoons 17, the pontoons 17 are connected through short connecting bolts 18, the steel mesh filter unit 5 is fixedly installed on the pontoon type working platform 3 through long connecting bolts 19, the pontoon type working platform 3 is formed by splicing double-layer pontoons 17, the height of the double-layer pontoons 17 in the pontoon type working platform 3 is 800mm, the maximum load is 640kg/m2, the cross section of the pontoons 17 is square, four corners are in a shape of arc obtuse angles, and 8 pontoons 17 are arranged in each 1 square meter of the pontoon type working platform 3.
In this embodiment, as shown in fig. 5, the steel mesh filtering unit 5 is a cuboid with a side length of 1m and a height of 5cm, the steel mesh filtering unit 5 is a hot-dip galvanized steel mesh, and the mesh size is 10 meshes. Similarly, the size of the geotube bag 8 is a square with the side length of 1m, the equivalent aperture of the geotube bag 8 is 0.2mm, the permeability is more than or equal to 20L/m2/s, the seam tensile strength is more than or equal to 70kN/m, the filling height is not more than 0.45m, and the geotube bag 8 is woven by high-toughness polypropylene yarns.
In the embodiment, the flocculating agent in the flocculating agent storage tank 11 is chitosan and poly ferric chloride, and the addition amount of the flocculating agent is 0.1-0.5% of the mass of the slurry in the sludge reactor 10.
When the embodiment is used, the disposal method comprises the following steps:
(1) a buoy type working platform 3 is built on a river channel 2 to be desilted;
(2) a steel grid filtering unit 5 is arranged on the float type working platform 3, and filtering materials consisting of pebbles 15 and activated carbon 16 are filled in the steel grid filtering unit 5;
(3) laying a geotextile tube bag 8 on the steel grid filtering unit 5;
(4) the mud is sent into the vehicle-mounted type integrated agent adding and mixing device 4 through the mud inlet pipe 6 by using the environment-friendly cutter suction dredger 1, a flocculating agent is added and uniformly mixed, and then the mud is sent to the soil engineering pipe bag 8 through the mud outlet pipe 7, the vehicle-mounted type integrated agent adding and mixing device 4 is positioned at the bank of the river, and the filling height of the soil engineering pipe bag 8 is not more than 0.45 m;
(5) after the earthwork pipe bag 8 is filled, the slurry in the earthwork pipe bag 8 is solidified, precipitated and drained by using the dead weight of the slurry, and the effluent in the earthwork pipe bag 8 flows into the river channel 2 after being filtered and purified by the filter material, so that secondary pollution is avoided;
(6) after the sludge in the soil engineering pipe bag 8 reaches the target of the designed water content, the sludge is transported to the outside for landfill, incineration or greening and the like.
According to the in-situ dredging system for the urban black and odorous river channel and the disposal method thereof, on the premise that the sludge conveying distance is shortened and the sludge is not subjected to land centralized treatment, the black and odorous sludge in the river channel 2 is quickly removed, dehydrated and solidified, and the floating barrel type working platform 3 is built on the river channel 2 to be dredged to serve as a sludge consolidation and dehydration site, so that the problem that the centralized sludge disposal site is difficult to be built in the urban area is solved, the conveying distance of dredging slurry is shortened, and secondary pollution to the environment is effectively avoided; adopt geotechnological tube bag 8 to carry out silt dehydration concreties silt, avoids the environmental pollution problem that the silt sunning caused, and compares mechanical dehydration, can reduce the cost that the desilting of river course 2 was dealt with.
Claims (7)
1. The utility model provides a black smelly river course normal position desilting system in city, includes environmental protection cutter suction ship (1), its characterized in that: the environment-friendly cutter suction boat further comprises a float-type working platform (3) arranged on the river channel (2) and a vehicle-mounted medicament integrated adding and mixing device (4) arranged on the bank, wherein a plurality of steel grid filtering units (5) are paved on the float-type working platform (3), filtering materials are filled in the steel grid filtering units (5), the vehicle-mounted medicament integrated adding and mixing device (4) is connected with the environment-friendly cutter suction boat (1) through a sludge inlet pipe (6), a soil engineering pipe bag (8) is connected with the sludge outlet pipe (7), the soil engineering pipe bag (8) is laid above the steel grid filtering units (5), the vehicle-mounted medicament integrated adding and mixing device (4) comprises a movable vehicle (9), a sludge reactor (10) connected with the sludge inlet pipe (6) is arranged on the movable vehicle (9), the sludge reactor (10) is connected with the sludge outlet pipe (7) at the bottom, still be equipped with flocculating agent storage tank (11) on locomotive (9), flocculating agent storage tank (11) pass through screw conveyer (12) with silt reactor (10) are connected, be equipped with mixer (13) in silt reactor (10), be equipped with force (forcing) pump (14) on mud pipe (7), filtering material includes cobble (15) and active carbon (16), active carbon (16) are laid in steel graticule net filter unit (5), the particle diameter is 8 ~ 12 meshes, lays highly 1 ~ 1.5cm, cobble (15) are laid on active carbon (16), cobble (15) diameter is 3 ~ 5 cm.
2. The in-situ dredging system for urban black and odorous river channel according to claim 1, characterized in that: buoy formula work platform (3) are assembled by a plurality of flotation pontoon (17) and are constituted, connect through short connecting bolt (18) between flotation pontoon (17), steel grid filter unit (5) are in through long connecting bolt (19) fixed mounting on buoy formula work platform (3).
3. The in-situ dredging system for urban black and odorous river channel according to claim 2, characterized in that: buoy formula work platform (3) comprise double-deck flotation pontoon (17) concatenation, double-deck flotation pontoon (17) height in buoy formula work platform (3) is 600 ~ 800mm, and the maximum load is 600 ~ 800kg/m2, flotation pontoon (17) cross section is the square, and the four corners is the circular arc obtuse angle molding, every 1 square meter of buoy formula work platform (3) is equipped with 8 flotation pontoon (17).
4. The in-situ dredging system for urban black and odorous river channel according to claim 1, characterized in that: the steel grid filtering unit (5) is a cuboid with the side length of 1-1.5 m and the height of 5-6 cm, the steel grid filtering unit (5) is a hot-dip galvanized steel grid, and the size of a sieve mesh is 10-14 meshes.
5. The in-situ dredging system for urban black and odorous river channel according to claim 1, characterized in that: the size of the geotextile tube bag (8) is a square with the side length of 1-1.5 m, the equivalent aperture of the geotextile tube bag (8) is 0.2-0.6 mm, the permeability is not less than 20L/m2/s, the seam tensile strength is not less than 70kN/m, the filling height is not more than 0.45m, and the geotextile tube bag (8) is woven by high-toughness polypropylene yarns.
6. The in-situ dredging system for urban black and odorous river channel according to claim 1, characterized in that: the flocculant in the flocculant storage tank (11) is chitosan and poly ferric chloride, and the addition amount of the flocculant is 0.1-0.5% of the mass of the slurry in the sludge reactor (10).
7. A disposal method of the in-situ dredging system for the urban black and odorous river channel according to claim 1, characterized in that: the method comprises the following steps:
(1) the buoy type working platform (3) is built on the river channel (2) to be desilted;
(2) the steel grid filtering unit (5) is arranged on the float-type working platform (3), and filtering materials consisting of pebbles (15) and activated carbon (16) are filled in the steel grid filtering unit (5);
(3) paving the geotextile tube bags (8) on the steel grid filtering units (5);
(4) the environment-friendly cutter suction dredger (1) is used for sending slurry into the vehicle-mounted type integrated medicament adding and mixing device (4) through the sludge inlet pipe (6), adding a flocculating agent, uniformly mixing, and then sending the slurry to the geotechnical pipe bag (8) through the sludge outlet pipe (7), wherein the vehicle-mounted type integrated medicament adding and mixing device (4) is located on the bank side of a river, and the filling height of the geotechnical pipe bag (8) is not more than 0.45 m;
(5) after the earthwork pipe bag (8) is filled, the mud in the earthwork pipe bag (8) is used for solidification, sedimentation and draining by self weight, and the effluent in the earthwork pipe bag (8) flows into the river channel (2) after being filtered and purified by the filter material, so that secondary pollution is avoided;
(6) and after the sludge in the soil engineering pipe bag (8) reaches the target of the designed water content, the sludge is transported to the outside for landfill, incineration or greening and the like.
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| CN202010993892.5A CN112225345A (en) | 2020-09-21 | 2020-09-21 | In-situ dredging system for urban black and odorous river channel and disposal method thereof |
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| CN202010993892.5A CN112225345A (en) | 2020-09-21 | 2020-09-21 | In-situ dredging system for urban black and odorous river channel and disposal method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611497A (en) * | 2022-11-09 | 2023-01-17 | 江苏远卓工程技术有限公司 | In-situ mud-water separation and resource utilization method for river and lake sludge |
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| WO2006077282A1 (en) * | 2005-01-24 | 2006-07-27 | Oy Kwh Pipe Ab | Process and device for cleaning waste water |
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