CN110981127A

CN110981127A - River channel ecological restoration process

Info

Publication number: CN110981127A
Application number: CN201911201651.6A
Authority: CN
Inventors: 冯鹰; 卢德明; 孙小锋; 范小军; 劳筱晶; 姚越峰
Original assignee: Zhejiang Shujun Engineering Co ltd
Current assignee: Zhejiang Shujun Engineering Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-04-10

Abstract

The invention discloses a river channel ecological restoration process, belongs to the technical field of river channel treatment, and comprises the following operation steps: A. sludge excavation: firstly, excavating a ship position in a construction area, dispatching a repair ship, lifting the construction ship into an excavated ship position area after the ship position is excavated, and putting sludge in an excavated river channel of a front-section back-shovel excavator onto a pretreatment screening device; B. scouring sludge: flushing sludge by using a water gun, putting a mud-water mixture into a sludge bin, cleaning sundries into a storage bin, subsequently transporting the sundries to a temporary wharf through a mud barge, and transporting a self-discharging automobile after an excavator is loaded onto a ship to a specified yard; and adding a physicochemical agglutinant into the mud-water mixture in the mud bin by using a dosing device, fully stirring by using a stirrer in the mud bin for at least 3 minutes, and putting the sludge after stirring back to the river channel. The river channel ecological restoration process cleans sludge, reduces sundries from being backfilled into a river channel, and improves the ecological restoration effect.

Description

River channel ecological restoration process

Technical Field

The invention relates to the technical field of river channel treatment, in particular to a river channel ecological restoration process.

Background

The restoration technology of the polluted bottom mud is mainly divided into in-situ restoration and ex-situ restoration. The ex-situ restoration work amount is large, and meanwhile, certain negative effects are brought to the ecological environment of rivers and lakes. Therefore, the in-situ control technology becomes an ideal mode for bottom mud remediation. In-situ repair is divided into physical covering technology, chemical control technology and biological repair technology. The sediment physical covering technology has large engineering quantity, is not suitable for rivers, lakes and ports, and is more suitable for deep-sea sediment repair. The chemical control technology mainly stabilizes pollutants in the bottom mud through the action of flocculation precipitation and the like, and has better effect on controlling phosphorus. The chemical treatment technology has relatively low cost and high engineering implementation feasibility. Bioremediation refers to the process of utilizing biological activities to inhibit and degrade pollutants in bottom mud so as to restore the ecological environment to a natural state. Bioremediation is mainly classified into microbial remediation and phytoremediation. Compared with physical and chemical methods, the biological repair method has the advantages of low cost, high efficiency, no damage to the original ecology and the like. Microbial remediation is often used to degrade organic pollutants. And degrading pollutants in the sediment by adopting artificial domestication, immobilized microorganisms, transgenic engineering bacteria and the like, thereby reducing the release of the pollutants in the sediment to an overlying water body. The phytoremediation is a remediation method for removing organic and inorganic pollutants in water to purify bottom mud by utilizing the effects of absorption, degradation, fixation and the like of the root system of aquatic plants. Meanwhile, pollutants such as heavy metals and the like can be enriched in plants, and pollutants in a water body can be removed through plant harvesting. In recent years, bioremediation has been in a generally increasing trend.

Chinese patent with application number 2017106063050 discloses a novel composite physical and chemical coagulant and an in-situ dredging and ecological restoration technology for river channels and lakes, wherein sludge at the bottom of the river channel and the novel composite physical and chemical coagulant are fully stirred for 3-5 minutes in a narrower and shallower river channel in a mechanical and manual mode according to the proportion of 100: 1-120: 1; in deeper and wider river channels and lakes, a special sludge stirrer for sucking sludge from the river bottom and the lake bottom to a cabin by a cutter suction dredger is adopted, the novel composite physical and chemical coagulant is added according to the proportion of 100: 1-120: 1, and the novel composite physical and chemical coagulant is fully stirred for 3-5 minutes and then placed back to the original river channels and lakes.

Although the ecological restoration technology can restore the river channel or the lake, the sludge is neglected to be cleaned in the whole process, and if metal or other impurities are still put back into the river channel, the river channel is polluted again, and the ecological restoration effect is poor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a river ecological restoration process, which cleans sludge, reduces sundries from being backfilled into a river and improves the ecological restoration effect.

The above object of the present invention is achieved by the following technical solutions:

a river ecological restoration process comprises the following operation steps:

A. sludge excavation: firstly, excavating a ship position in a construction area, dispatching a repair ship, lifting the construction ship into an excavated ship position area after the ship position is excavated, and putting sludge in an excavated river channel of a front-section back-shovel excavator onto a pretreatment screening device;

B. scouring sludge: flushing sludge by using a water gun, putting a mud-water mixture into a sludge bin, cleaning sundries into a storage bin, subsequently transporting the sundries to a temporary wharf through a mud barge, and transporting a self-discharging automobile after an excavator is loaded onto a ship to a specified yard;

C. adding a physicochemical agglutinant into the mud-water mixture in the mud bin by adopting a dosing device, and fully stirring by a stirrer in the mud bin for not less than 3 minutes;

D. and (5) returning the sludge after stirring to the river channel.

Through adopting above-mentioned technical scheme, the silt of digging in the river course is put into the screening of preliminary treatment screening plant earlier, and erode through the squirt, make the mud mixture fall into in the mud storehouse, and some debris such as the metal of digging up in the river course can be sieved out, make follow-up mud when backfilling in the river course, in can the significantly reduced debris are backfilled the river course, further reduce the influence of debris such as metal to the river course environment, improve ecological prosthetic effect.

The invention is further configured to: the pretreatment screening device comprises a filter plate above the mud bin, the storage bin is arranged on the edge of the repair ship, and the filter plate is obliquely arranged on the repair ship in the direction of the storage bin and is in butt joint with the storage bin opening.

Through adopting above-mentioned technical scheme, place the back on the filter plate with the silt that excavates in the river course to erode through the squirt, make the mud mixture fall into the mud storehouse in, and debris can roll from the filter plate of slope and fall, directly roll and fall to storing the storehouse in, such structure makes the clearance debris more convenient.

The invention is further configured to: the filter plate is hinged on a repairing ship, a support frame is arranged on the repairing ship below the filter plate, when the filter plate is horizontal, the filter plate is abutted against the support frame, a spring is arranged between the support frame and the filter plate, and when the spring is in a natural state, the filter plate is in an inclined state.

The silt that excavates in the river course directly places the words on the filter plate of slope, part silt is easy in the filter plate of slope directly landing to storing the storehouse, through adopting above-mentioned technical scheme, place the filter plate back with silt on, because the effect of silt weight can the filter plate press the horizontally state, after the squirt dashes silt in the mud storehouse, the filter plate is under the effect of spring, the upward movement of slope for debris can roll and fall in storing the storehouse, such structure makes silt be difficult for entering into in the storehouse.

The invention is further configured to: the filter plate is articulated for the other end with restoreing the ship articulated to have the pothook, and when the filter plate was in the horizontality, the pothook joint was on the support frame.

Through adopting above-mentioned technical scheme, at the in-process of screening, can be with the pothook joint on the support frame for the filter plate is in the horizontality, thereby makes silt more be difficult to enter into in the storage storehouse when screening.

The invention is further configured to: store the storehouse downwardly extending and lie in the water in river course, store and offer the through-hole with outside water intercommunication on the storehouse lateral wall.

In the process of dredging the sludge, some fishes can be dredged together, when the fishes are always in the storage bin, the fishes are very dangerous and easy to break by sundries, and by adopting the technical scheme, the arrangement of the through holes enables the fishes dredged to swim back to the river channel from the through holes, so that the damage to the ecology of the river channel is reduced.

The invention is further configured to: the through hole outside the storage bin is provided with a necking pipe, the aperture of one end of the necking pipe is larger than that of the other end of the necking pipe, and the large opening end of the necking pipe is in butt joint with the through hole.

Through adopting above-mentioned technical scheme, the setting up of throat pipe makes the fish in the storage storehouse swim to the river course easily, and the fish in the river course is difficult for meeting in the storage storehouse.

The invention is further configured to: articulated in storing the storehouse have the division board, be equipped with in division board and the articulated department of storing the storehouse and order about the division board torsional spring that makes progress the pivoted, the inner wall of storing the storehouse is equipped with the dog, and the division board butt is in the horizontality when on the baffle, and the division board will store the storehouse and separate the storage compartment for the room that drops and below of top, the through-hole communicates with the room that drops each other.

Through adopting above-mentioned technical scheme, the setting of division board is separated into storage storehouse and is dropped room and storage room, and debris drop back on the division board, and the division board receives the effect of debris gravity to take place to rotate for in debris drop the storage room, and the fish still can float and be located the room that drops in the top of division board, makes the fish can only be in the indoor activity that drops, thereby can make the fish find the through-hole more easily and swim to the river course fast in, further reduce by the possibility of pounding.

The invention is further configured to: the storage bin is characterized in that a floating plate is arranged in the storage chamber, the floating plate is connected with the inner wall of the storage chamber in a sliding mode, and a connecting rope is arranged between the inner bottom wall of the storage bin and the floating plate.

When the sundries in the storage chamber drop too much, one side of the repairing ship can incline, the operation of the repairing ship can be influenced, and meanwhile, the safety problem also exists, so that the storage chamber needs to be cleaned regularly, the operation is troublesome, by adopting the technical scheme, the sundries dropping in the storage chamber can drop on the floating plate, the weight of the sundries is enabled to be acted on the floating plate, the storage chamber can store more sundries, the repairing ship can not incline greatly, the number of times of cleaning the storage chamber can be reduced, and the ecological repairing efficiency is improved.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the excavated sludge is screened to remove impurities such as metal in the sludge, so that when the sludge is backfilled, the impurities can be reduced and backfilled into the river channel, the influence of the impurities such as metal on the river channel environment is reduced, and the ecological restoration effect is improved.

2. Sundries can fall on the floating plate, so that the storage bin can store more sundries at one time, and the storage bin is not easy to incline greatly, thereby reducing the times of cleaning the storage bin and improving the efficiency of ecological restoration.

3. The fish that excavates the up can swim back to the river course fast in, and the fish is difficult for receiving the injury, reduces the ecological destruction to the river course in the restoration process.

Drawings

Fig. 1 is a side view of a rehabilitation vessel according to the invention.

Fig. 2 is a schematic structural view between the mud bin and the storage bin of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a partially enlarged schematic view of a portion B in fig. 2.

In the figure, 1, a repair ship; 2. a backhoe excavator; 3. a blender; 4. filtering the plate; 5. a storage bin; 51. a drop chamber; 52. a storage chamber; 6. a support frame; 7. a spring; 8. a hook; 9. a mud bin; 10. a through hole; 11. a necking pipe; 12. a separator plate; 13. a torsion spring; 14. a stopper; 15. a floating plate; 16. connecting ropes; 17. a pipe body; 18. a rod body; 19. a through groove; 20. and a baffle plate.

Detailed Description

As shown in fig. 1 and fig. 2, the river ecological restoration process disclosed by the invention comprises the following operation steps:

A. sludge excavation: firstly, excavating a construction area, dispatching a restoration ship 1, lifting the construction ship into an excavated ship area after the ship excavation is finished, and excavating sludge in a river channel by a front-section back-shovel excavator 2 to enter a pretreatment screening device;

B. scouring sludge: pumping water from the river channel directly by a water pump and flushing sludge by a high-pressure water gun, putting a mud-water mixture into a mud bin 9, cleaning sundries into a storage bin 5, subsequently transporting the sundries to a temporary wharf by a mud barge, and transporting a dump truck to a specified yard after an excavator is lifted off a ship;

C. adding a physical and chemical coagulant (the physical and chemical coagulant is disclosed in the patent with the application number of 2017106063050 and is not specifically described at present) to the muddy water mixture in the mud bin 9 by using a dosing device, and fully stirring by using a stirrer 3 in the mud bin 9 for not less than 3 minutes;

D. and backfilling the stirred sludge into the river channel by a sludge pump.

The pretreatment screening device comprises a filter plate 4 above a mud bin 9, the filter plate 4 is hinged on the inner wall of the mud bin 9, the filter plate 4 is rectangular, baffle plates 20 are arranged on three sides of the filter plate 4, the baffle plate 20 is not arranged on one side hinged with the mud bin 9, a support frame 6 for placing the filter plate 4 is arranged in the mud bin 9, when the filter plate 4 is placed on the support frame 6, the filter plate 4 is in a horizontal state, and the upper end face of the filter plate 4 is flush with the upper surface of the mud bin 9; hang on the right side of repairing ship 1 and be equipped with storage storehouse 5, store the aquatic of storehouse 5 downwardly extending to the river course, slide about in storing storehouse 5 and be connected with and float board 15, float board 15 and be made by plastics, be equipped with between the interior diapire of storing storehouse 5 and float board 15 and connect rope 16 for it can float in aquatic to float board 15.

As shown in fig. 3, a tube body 17 is hinged to the support frame 6, a spring 7 is arranged in the tube body 17, a rod body 18 is arranged in the tube body 17 in a vertically sliding manner, one end of the rod body 18 is hinged to the lower surface of the filter plate 4, the other end of the rod body 18 is abutted to one end of the spring 7, the other end of the spring 7 abutted to the rod body 18 is fixed to the inner wall of the tube body 17, a through groove 19 communicated with the inside of the tube body 17 is arranged on the side wall close to one end of the tube body 17 hinged to the support frame 6, when the rod body 18 moves up and down in the tube body 17, air in the tube body 17 changes, the air can enter and exit the tube body 17 through the through groove 19, and the diameter of the through groove 19 is smaller than the; the lower surface of filter plate 4 articulates there is pothook 8, can make filter plate 4 be in the horizontality on support frame 6 through pothook 8 joint, removes pothook 8 back from support frame 6, and filter plate 4 can up rotate under the effect of spring 7 for filter plate 4 is in the tilt state, thereby makes the lower extreme of filter plate 4 and the opening butt joint of storing storehouse 5, and debris on the filter plate 4 can be automatically fallen into and store in the storehouse 5.

As shown in fig. 1 and fig. 4, a partition plate 12 is hinged in the storage bin 5 above the floating plate 15, the storage bin 5 is divided into an upper dropping chamber 51 and a lower storage chamber 52 by the partition plate 12, a torsion spring 13 for driving the partition plate 12 to rotate upwards is arranged at the hinge joint of the partition plate 12 and the storage bin 5, a stopper 14 is fixedly arranged on the inner wall of the dropping chamber 51, when the upper surface of the partition plate 12 abuts against the lower surface of the stopper 14, the partition plate 12 is in a horizontal state, and the stopper 14 can limit the partition plate 12; a necking pipe 11 is fixedly arranged on the outer wall of the storage bin 5, the aperture of one end of the necking pipe 11 is larger than that of the other end of the necking pipe, the large-opening end of the necking pipe 11 is fixedly connected with the outer wall of the storage bin 5, a through hole 10 connected with the necking pipe 11 is further formed in the outer wall of the storage bin 5, the diameter of the through hole 10 is equal to the aperture of the large end of the necking pipe 11, the through hole 10 is communicated with a dropping chamber 51, and the through hole 10 is immersed in water in a river channel; after debris dropped on division board 12, division board 12 atress can take place to rotate downwards for debris can be stored in dropping storage compartment 52, and the fish still can float the top of division board 12, and the debris that drop have the effect of driving, makes the fish can swim to the river course through-hole 10 fast in.

The implementation principle of the embodiment is as follows: the silt that comes is excavated through backhoe excavator 2 is put and is sieved on filter plate 4, and erode silt through high-pressure squirt, make mud-water mixture fall into mud storehouse 9, and debris stay on filter plate 4, when debris are more, go to stir pothook 8 through the manual work and make it break away from support frame 6, body of rod 18 stretches out from body 17 under the effect of spring 7 elasticity, it rotates to promote filter plate 4 to take place, make debris landing on filter plate 4 in storing storehouse 5, also there is the fish landing in storing storehouse 5 during, debris fall back on division board 12, division board 12 atress takes place to rotate downwards, make debris continue to drop down, drop to on floating plate 15, and the fish still can float in the aquatic of room 51 that drops, can be in the river course through-hole 10.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The river ecological restoration process is characterized by comprising the following operation steps:

A. sludge excavation: firstly, excavating a construction area, dispatching a repair ship (1), lifting the construction ship into an excavated ship area after the excavation of the ship is finished, and excavating sludge in a river channel by a front-section back-shovel excavator (2) to enter a pretreatment screening device;

B. scouring sludge: flushing sludge by using a water gun, putting a mud-water mixture into a sludge bin (9), cleaning sundries into a storage bin (5), subsequently transporting the sundries to a temporary wharf through a mud barge, and transporting a self-discharging automobile to a specified yard after an excavator is lifted from a ship;

C. adding a physicochemical agglutinant into the muddy water mixture in the mud bin (9) by adopting a dosing device, and fully stirring by a stirrer (3) in the mud bin (9) for not less than 3 minutes;

D. and (5) returning the sludge after stirring to the river channel.

2. The river ecological restoration process according to claim 1, characterized in that: the pretreatment screening device comprises a filter plate (4) above a mud bin (9), a storage bin (5) is arranged on the edge of the repair ship (1), and the filter plate (4) is obliquely arranged on the repair ship (1) in the direction of the storage bin (5) and is in butt joint with a bin opening of the storage bin (5).

3. The river ecological restoration process according to claim 2, characterized in that: the filter plate (4) is hinged to the repairing ship (1), a support frame (6) is arranged on the repairing ship (1) below the filter plate (4), when the filter plate (4) is in a horizontal state, the filter plate (4) is abutted to the support frame (6), a spring (7) is arranged between the support frame (6) and the filter plate (4), and when the spring (7) is in a natural state, the filter plate (4) is in an inclined state.

4. The river ecological restoration process according to claim 3, wherein the ecological restoration process comprises the following steps: the filter plate (4) is articulated for the other end articulated with restoreing ship (1) to have pothook (8), and when filter plate (4) was in the horizontality, pothook (8) joint was on support frame (6).

5. The river ecological restoration process according to claim 2, characterized in that: store storehouse (5) downwardly extending position to the water in river course, store and offer through-hole (10) with outside water intercommunication on storehouse (5) lateral wall.

6. The river ecological restoration process according to claim 5, wherein the ecological restoration process comprises the following steps: the through hole (10) outside the storage bin (5) is provided with a necking pipe (11), the aperture of one end of the necking pipe (11) is larger than that of the other end, and the large-opening end of the necking pipe (11) is butted with the through hole (10).

7. The river ecological restoration process according to claim 6, wherein the ecological restoration process comprises the following steps: articulated have division board (12) in storing storehouse (5), be equipped with in division board (12) and the articulated department of storing storehouse (5) and order about division board (12) pivoted torsional spring (13) that makes progress, the inner wall of storing storehouse (5) is equipped with dog (14), when division board (12) butt is on baffle (20), division board (12) are in the horizontality, and division board (12) are separated storing storehouse (5) for the room that drops (51) and storage compartment (52) of below of top, through-hole (10) communicate each other with the room that drops (51).

8. The river ecological restoration process according to claim 2, characterized in that: be equipped with in storage compartment (52) and float board (15), float board (15) and be connected with sliding from top to bottom storage compartment (52) inner wall, be equipped with between diapire and the float board (15) and connect rope (16) in the storage storehouse (5).