Lake water body ecological restoration device and restoration method

Abstract

The present application relates to lake ecological restoration equipment technical field, disclose a kind of lake water ecological restoration device and restoration method, including hull, flocculation tank, shell, collection tank, intercepting arm and traction robot, further comprising: chain conveyer, guide rail, extrusion mechanism and support frame.The present application is by being provided extrusion mechanism on chain conveyer, and extrusion plate is driven to extrusion cavity by guide rail extrusion flocculation blue-green algae, so that extracellular polymer substance loses water shrinkage, viscosity reduces, effectively solve the problem that algal mud group is difficult to fall off from chain conveyer due to excessive adhesion, ensure the sustained and effective of conveying area, improve conveying efficiency and blue-green algae salvage efficiency;While the water content of algal mud after dehydration significantly reduces, the phenomenon of ship weight gain subsidence is reduced, ensure that water surface blue-green algae can smoothly enter flocculation tank, and reduce the dehydration difficulty and cost of subsequent recovery processing.

Description

Technical Field

[0001] This invention relates to the field of lake ecological restoration equipment technology, specifically to a lake water ecological restoration device and restoration method. Background Technology

[0002] Cyanobacterial blooms are one of the main causes of lake pollution, necessitating regular removal and cleaning of the algae. Current algae removal operations often employ long-arm cleaning vessels. The process typically involves a towing robot moving interceptor arms across the water while the cleaning vessel navigates, using the interception and guiding action of the two sets of arms to guide the algae into a flocculation tank at the bow. Flocculants are then added to the flocculation tank, causing the algae to flocculate into algal clumps. These clumps are then scooped up by a chain conveyor and transported to a collection bin on the vessel, separating the algae from the water. This flocculation process also serves as pretreatment for subsequent algae recycling.

[0003] However, the above-mentioned salvage process has the following problems: After cyanobacteria flocculate, the extracellular polymeric substances (EPS) secreted by their cells, combined with the residual flocculant, give the algal clumps a strong adhesive force. When the chain conveyor lifts and unloads the algal clumps, some clumps have an adhesive force greater than their own weight, making it difficult for them to detach from the chain surface and causing them to accumulate continuously as the chain returns. The accumulated algal clumps on the chain conveyor directly reduce the effective conveying area, leading to a decrease in conveying efficiency. Simultaneously, the accumulated algal clumps also clog the drainage holes on the chain conveyor, preventing the collected algal clumps from draining effectively and significantly increasing their water content. Excessive water content in the algal clumps not only increases the difficulty and cost of subsequent dehydration and recycling, but also causes the ship to sink due to the large amount of high-water-content algal clumps collected, altering the water entry state of the flocculation tank at the bow, thus hindering the smooth entry of surface cyanobacteria into the flocculation tank and further reducing salvage efficiency.

[0004] Furthermore, decreased transport efficiency is accompanied by a continuous increase in flocculated cyanobacteria in the flocculation tank. Some early-formed flocs age and remain suspended on the water surface for extended periods, occupying a significant amount of space within the tank. The presence of aged flocs hinders the collision and aggregation between newly formed micro-flocs and mature flocs, inhibiting the normal growth process of the flocs. Simultaneously, aged flocs continuously consume the flocculant in the tank, resulting in ineffective waste of the agent. Consequently, newly entering cyanobacteria cannot effectively destabilize and aggregate due to insufficient flocculant, severely impacting the cyanobacteria recovery efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a lake water ecological restoration device and method to achieve smooth unloading of algae sludge, improve the efficiency of blue-green algae harvesting and recycling, and reduce the water content of algae sludge.

[0006] The objective of this invention can be achieved through the following technical solutions: A lake water ecological restoration device includes a hull, a flocculation tank, an outer shell, a collection tank, an interception arm, and a traction robot. The device also includes: A chain conveyor is installed inside a housing. Inside the housing, there is a drive roller for driving the chain conveyor. The chain conveyor is in an inclined state, with its inclined bottom end extending into the flocculation tank and its inclined top end located at the collection tank. Several drainage holes are provided on the chain conveyor. The housing contains two sets of guide rails symmetrically installed. The extrusion mechanism includes a chain conveyor with several partitions forming an extrusion chamber between adjacent partitions. An extrusion mechanism is installed inside the extrusion chamber. The extrusion mechanism includes a connecting plate, a tilting component, and an extrusion plate. There are four sets of connecting plates, with each pair of connecting plates slidably connected to a set of guide rails. A drive plate is slidably installed on the side of the connecting plate. Two sets of transmission chains are symmetrically connected to both ends of the transmission roller. Several sleeve frames are provided on the transmission chains. Two sets of drive plates on the same side extend into the sleeve frames. The extrusion plates are rotatably connected to the two sets of connecting plates on different sides. A tilting component is movably installed inside the two sets of connecting plates on the same side. One end of the tilting component is slidably connected to the guide rail, and the other end is rotatably connected to the two sets of extrusion plates. The guide rail drives the two sets of extrusion plates to extrude the flocculated blue-green algae in the extrusion chamber. A support frame is provided inside the outer shell. The support frame is located inside the chain conveyor and supports the top of the chain conveyor.

[0007] As a further embodiment of the present invention: the guide rail includes an outer guide frame and an inner guide frame. The outer guide frame is used to drive the extrusion plate to extrude the flocculated blue-green algae in the extrusion chamber. The inner guide frame drives the flipping component to flip the two sets of extrusion plates to a horizontal or vertical state. Both the outer guide frame and the inner guide frame include a feeding arc segment, a wave segment, a discharging arc segment, an extrusion segment, a sinking segment, and a horizontal segment. The extrusion segment, sinking segment, horizontal segment, and feeding arc segment on the inner guide frame are located inside the extrusion segment, sinking segment, horizontal segment, and feeding arc segment on the outer guide frame. Two sets of guide grooves are opened on the inner side of the outer guide frame. Guide blocks are staggered on the two sets of connecting plates on the same side. The guide blocks slide with the guide grooves.

[0008] As a further aspect of the present invention: the wave section of the guide groove is provided with an outward protrusion, the outward protrusions in the two sets of guide grooves on the same side face away from each other, the guide groove is located at the position of the outward protrusion to form an arc groove, when the guide block moves to the arc groove, the two sets of extrusion plates move alternately to flocculate and condense blue algae, and the extrusion chamber of the chain plate conveyor is provided with several protrusions perpendicular to the partition.

[0009] As a further embodiment of the present invention: the flipping component includes a push-pull rod and a hinge plate. A movable groove is provided between two sets of connecting plates on the same side. The push-pull rod is located in the movable groove. One end of the push-pull rod is slidably engaged with the inner guide frame, and the other end is equipped with two sets of hinge plates. The hinge plates are hinged to the extrusion plates. A notch is provided on the connecting plate for the hinge plates to move. Dividing blocks are symmetrically provided on the two sets of extrusion plates.

[0010] As a further embodiment of the present invention: a sealing plate is provided at one end of the extrusion plate, and the sealing plates on the two sets of extrusion plates are symmetrical about the center point of the two sets of extrusion plates, and the two sets of sealing plates block both ends of the extrusion chamber.

[0011] As a further aspect of the present invention: the drain hole is located inside the extrusion chamber, the partition plate has a cavity, a plurality of drain holes are provided between the cavity and the extrusion chamber, and a plurality of leakage holes communicating with the cavity are provided on the chain conveyor.

[0012] As a further aspect of the present invention: a baffle is provided inside the cavity, which divides the cavity into two sets of movable cavities. Movable plates are slidably installed inside the movable cavities. Several connecting holes communicating with drainage holes are opened on the movable plates. Magnetic elements are provided on the side of the extrusion plate that is in contact with the partition and on the movable plates. The two sets of magnetic elements are magnetically attracted to each other.

[0013] A method for restoring a lake water ecological restoration device, the method being applied to the lake water ecological restoration device as described above, the method comprising the following steps: Step S1: Blue-green algae introduction and flocculation. Blue-green algae on the water surface are introduced into the flocculation tank by a traction robot and an interception arm, and flocculant is added to make the blue-green algae flocculate into algal mud. Step S2: The algae mud is lifted and conveyed, driving the chain conveyor to run, so that the algae mud clumps enter the extrusion chamber, and the extrusion mechanism moves synchronously with the chain conveyor; Step S3: Extrusion and dehydration. When the extrusion mechanism moves along the guide rail, it drives the extrusion plate to flip and unfold, and reciprocates to extrude and dehydrate the algae mud clumps. The extruded water is discharged. Step S4: Negative pressure deep dehydration and self-cleaning. When the extrusion plate returns, the extrusion chamber is closed to form negative pressure. The algae mud clump expands and loosens, the blue-green algae cells rupture and release bound water, and the blocked drainage holes achieve self-cleaning. Step S5: Material separation. When the extrusion mechanism moves to the material feeding section, the extrusion plate flips and folds in half to cut the algae mud clumps, assisting in the separation of the algae mud clumps from the chain conveyor. The dehydrated algae mud clumps fall into the collection tank.

[0014] The beneficial effects of this invention are: (1) This invention sets up an extrusion mechanism on the chain conveyor and uses a guide rail to drive the extrusion plate to extrude and dehydrate the flocculated cyanobacteria in the extrusion chamber, so that the extracellular polymer loses water and shrinks, and the viscosity is reduced. This effectively solves the problem that the algae mud clumps are difficult to fall off the chain conveyor due to excessive adhesion, ensuring the continuous effectiveness of the conveying area and improving the conveying efficiency and cyanobacteria harvesting efficiency. At the same time, the water content of the algae mud is significantly reduced after dehydration, which reduces the phenomenon of the ship sinking due to weight gain, ensures that the cyanobacteria on the water surface can smoothly enter the flocculation tank, and reduces the dehydration difficulty and cost of subsequent recycling and processing.

[0015] (2) The present invention uses the wave section design of the outer guide frame groove to make the extrusion plate reciprocate to extrude the algae mud clumps during the conveying process, and the extrusion force gradually increases with the increase of the distance between the trough and the crest of the wave section, which significantly improves the dewatering effect; further, the arc groove formed by the outer protrusion makes the two sets of extrusion plates produce an alternating rubbing action, which, together with the protrusion strip on the partition, loosens the extruded and compacted algae mud clumps, reopens the internal drainage channel, facilitates subsequent continuous dewatering, and makes the algae mud clumps easier to separate from the chain plate.

[0016] (3) The present invention uses the cooperation of the inner guide frame and the flipping part to keep the two sets of extrusion plates in a folded state during feeding to avoid obstructing the feeding. During lifting, the extrusion plates are driven to unfold and extrusion is carried out. During unloading, the extrusion plates are folded again and cut into algae mud clumps with the help of the dividing block. This actively assists in separating the algae mud clumps from the chain conveyor, thereby further preventing the accumulation of algae mud on the chain plate.

[0017] (4) The present invention uses the sealing plate on the extrusion plate to cooperate with the cavity in the partition plate which is equipped with a movable plate and a magnetic suction component. When the extrusion plate returns, the magnetic suction component drives the movable plate to close the drainage hole, so that the extrusion cavity forms a near-sealed negative pressure environment. The negative pressure causes the compacted algal mud to expand and loosen, and micro-cracks appear inside. At the same time, it forces the cyanobacterial cell wall to rupture due to the internal and external pressure difference, releasing intracellular bound water and algal toxins, which not only greatly improves the dehydration effect, but also reduces the toxicity of algal mud. The negative pressure can also pull out the algal mud clumps blocked in the drainage hole in the opposite direction, realizing the self-cleaning of the drainage hole and ensuring that the drainage channel is continuously unobstructed. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the chain conveyor and extrusion mechanism in this invention; Figure 3 This is a schematic diagram of the disassembled chain conveyor and extrusion mechanism in this invention; Figure 4 This is a front structural diagram of the chain conveyor and extrusion mechanism in this invention; Figure 5 This is a schematic diagram of the front structure of the guide rail in this invention; Figure 6 This is a schematic diagram of the guide rail structure from another perspective in this invention; Figure 7 This is a schematic diagram of the outer guide frame structure in this invention; Figure 8 This is a schematic diagram of the extrusion mechanism in this invention; Figure 9 This is a schematic diagram of the sealing plate structure in this invention; Figure 10 This is a schematic diagram of the internal structure of the partition in this invention; Figure 11 This is a schematic diagram of the flipping component structure in this invention.

[0020] In the picture: 1. Hull; 2. Chain conveyor; 21. Partition; 211. Cavity; 212. Drain hole; 22. Drainage hole; 23. Leakage hole; 24. Raised bar; 25. Movable plate; 251. Connecting hole; 3. Drive roller; 31. Drive chain; 311. Sleeve frame; 4. Guide rail; 41. Outer guide frame; 411. Guide groove; 412. Outer protrusion; 413. Arc groove; 42. Inner guide frame; 5. Extrusion mechanism; 51. Connecting plate; 511. Drive plate; 512. Movable groove; 513. Guide block; 514. Notch; 52. Tilting component; 521. Push-pull rod; 522. Hinge plate; 53. Extrusion plate; 531. Sealing plate; 532. Dividing block; 6. Support frame; 7. Flocculation tank; 8. Outer shell; 9. Collection tank; 10. Interception arm; 11. Traction robot. a. Feeding arc section; b. Wavy section; c. Discharge arc section; d. Extrusion section; e. Sinking section; f. Horizontal section. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-11 As shown, a lake water ecological restoration device includes a hull 1, a flocculation tank 7, an outer shell 8, a collection tank 9, an interception arm 10, and a traction robot 11. The device also includes: Chain conveyor 2 is installed inside the housing 8. Inside the housing 8, there is a drive roller 3 for driving the chain conveyor 2. The chain conveyor 2 is in an inclined state, with its inclined bottom end extending into the flocculation tank 7 and its inclined top end located at the collection tank 9. Several drainage holes 22 are opened on the chain conveyor 2. Guide rail 4, two sets of guide rail 4 are symmetrically installed inside the outer casing 8; The extrusion mechanism 5 is provided on the chain conveyor 2 with several partitions 21. An extrusion chamber is formed between adjacent partitions 21. The extrusion mechanism 5 is installed in the extrusion chamber. The extrusion mechanism 5 includes a connecting plate 51, a flipping part 52 and an extrusion plate 53. There are four sets of connecting plates 51. Every two sets of connecting plates 51 are slidably connected to a set of guide rails 4. A drive plate 511 is slidably installed on the side of the connecting plate 51. Two sets of transmission chains 31 are symmetrically connected to the two ends of the transmission roller 3. Several sleeves 311 are provided on the transmission chain 31. Two sets of drive plates 511 on the same side extend into the sleeves 311. The extrusion plate 53 is rotatably connected to the two sets of connecting plates 51 on different sides. A flipping part 52 is movably installed in the two sets of connecting plates 51 on the same side. One end of the flipping part 52 is slidably connected to the guide rail 4 and the other end is rotatably connected to the two sets of extrusion plates 53. The guide rail 4 drives the two sets of extrusion plates 53 to extrude the flocculated blue-green algae in the extrusion chamber. Support frame 6 is provided inside the outer shell 8. The support frame 6 is located inside the chain conveyor 2 and supports the top of the chain conveyor 2.

[0023] In practical application, the blue-green algae on the water surface gradually enter the flocculation tank 7 under the guidance of the traction robot 11 and the interception arm 10. The flocculation tank 7 is equipped with an automatic flocculant addition device. After the flocculant is added, the blue-green algae gradually form algal sludge clumps. At this time, the chain conveyor 2 is driven by the transmission roller 3, so that the algal sludge clumps on the water surface and in the water enter the extrusion chamber formed between the adjacent partitions 21. The chain conveyor 2 drives the algal sludge clumps to be lifted and flipped for unloading. The algal sludge clumps fall into the collection tank 9. During the process of lifting the algae flocs, the transmission chain 31 drives the drive plate 511 to move through the sleeve frame 311, causing the extrusion mechanism 5 to move along the chain conveyor 2. At the same time, the extrusion mechanism 5 moves along the guide rail 4, causing the extrusion plate 53 to move into the extrusion chamber. The extrusion plate 53 extrudes the algae flocs to achieve dehydration. The extruded wastewater is discharged through the drain hole 22. After dehydration, the flocculant separates from the algae flocs. At the same time, the extracellular polymeric substances (EPS) secreted by the cells lose water, shrink, and become brittle, and the viscosity is significantly reduced. At this time, the algae flocs are more likely to fall off the chain conveyor 2. This avoids the accumulation of algal clumps on the chain conveyor 2, which would reduce the effective conveying area of ​​the chain conveyor 2 and thus improve conveying efficiency. In addition, the dehydrated algal clumps have a low water content, which reduces the dehydration difficulty and processing cost of recycling and processing, while slowing down the sinking of the hull 1 and ensuring that the cyanobacteria can smoothly enter the flocculation tank 7, thereby improving the overall salvage efficiency. Finally, by smoothly separating the algal clumps from the chain conveyor 2, while ensuring conveying efficiency, it also ensures the normal growth of subsequent cyanobacteria flocs and avoids affecting the cyanobacteria recovery efficiency.

[0024] Furthermore, the guide rail 4 includes an outer guide frame 41 and an inner guide frame 42. The outer guide frame 41 is used to drive the extrusion plate 53 to extrude the flocculated blue-green algae in the extrusion chamber. The inner guide frame 42 drives the flipping component 52 to flip the two sets of extrusion plates 53 to a horizontal or vertical state. Both the outer guide frame 41 and the inner guide frame 42 include a feeding arc section, a wave section, a discharging arc section, an extrusion section, a sinking section, and a horizontal section. The extrusion section, sinking section, horizontal section, and feeding arc section on the inner guide frame 42 are located inside the extrusion section, sinking section, horizontal section, and feeding arc section on the outer guide frame 41. Two sets of guide grooves 411 are opened on the inner side of the outer guide frame 41. Guide blocks 513 are staggered on the two sets of connecting plates 51 on the same side. The guide blocks 513 slide with the guide grooves 411.

[0025] In practical application, taking the feeding arc segment a as the starting point, when the chain conveyor 2 is at this point, the algae sludge clumps in the flocculation tank 7 will enter the extrusion chamber under the drive of the partition plate 21. When the guide block 513 moves to the wave segment b of the guide groove 411, the guide block 513 drives the extrusion plate 53 to move back and forth in and out of the extrusion chamber through the connecting plate 51, thereby realizing the reciprocating extrusion of the algae sludge clumps, thereby improving the dewatering effect and further ensuring that the algae sludge clumps can be smoothly separated from the chain conveyor 2. It should also be noted that the positions of all the wave crests of the wave segment b remain unchanged, and the distance between the wave troughs and the wave crests increases with the direction of movement of the extrusion plate 53. This makes the extrusion plate 53 exert increasing pressure on the algae sludge clumps during the reciprocating movement, thereby further improving the dewatering effect and further ensuring that the algae sludge clumps can be smoothly separated from the chain conveyor 2. When the guide block 513 passes the feeding arc segment c and the extrusion segment d and enters the sinking segment e, the extrusion plate 53 moves away from the extrusion chamber, thus facilitating the dewatered algae sludge clumps to fall into the collection tank 9.

[0026] Furthermore, the wave section of the guide groove 411 is provided with an outer protrusion 412. The outer protrusions 412 in the two sets of guide grooves 411 on the same side face away from each other. The guide groove 411 is located at the position of the outer protrusion 412 to form an arc groove 413. When the guide block 513 moves to the arc groove 413, the two sets of extrusion plates 53 move alternately to flocculate and condense blue algae. The extrusion chamber of the chain plate conveyor 2 is provided with several protrusions 24 perpendicular to the partition plate 21.

[0027] In practical application, when the guide block 513 moves into the arc groove 413, the four sets of connecting plates 51 drive the two sets of extrusion plates 53 to move alternately. The two sets of extrusion plates 53 moving alternately can form a rubbing action, thereby rubbing the extruded algae mud clumps. With the help of several protrusions 24, this can further improve the dewatering effect and loosen the extruded algae mud clumps. The drainage channels in the loosened algae mud clumps will reopen, making it easier for the next extrusion and dewatering. At the same time, the loosened algae mud clumps are also easier to separate from the chain conveyor 2.

[0028] Furthermore, the flipping component 52 includes a push-pull rod 521 and a hinge plate 522. A movable groove 512 is provided between two sets of connecting plates 51 on the same side. The push-pull rod 521 is located in the movable groove 512. One end of the push-pull rod 521 is slidably engaged with the inner guide frame 42, and the other end is equipped with two sets of hinge plates 522. The hinge plates 522 are hinged to the extrusion plates 53. A notch 514 is provided on the connecting plate 51 for the hinge plates 522 to move. Dividing blocks 532 are symmetrically provided on the two sets of extrusion plates 53.

[0029] In practical application, taking the feeding arc segment a as the starting point, when the chain conveyor 2 is at this point, the algae clumps in the flocculation tank 7 will enter the extrusion chamber under the action of the partition plate 21. At this time, the push-pull rod 521 and the hinge plate 522 keep the two sets of extrusion plates 53 in a folded state, which can prevent the extrusion plates 53 from blocking the blue-green algae from entering the extrusion chamber. When the push-pull rod 521 passes through the feeding arc segment a and enters the wave segment b, the push-pull rod 521 will move outward from the connecting plate 51, thereby pulling the two sets of hinge plates 522 and causing the two sets of extrusion plates 53 to flip and unfold. When entering the wave segment b, the position of the push-pull rod 521 does not move, so that the two sets of extrusion plates 53 always remain in the unfolded state. At this time, the extrusion plates 53 only follow the connecting plate 51 and move back and forth along the extrusion chamber. When the material passes through the discharge arc section c and enters the extrusion section d, the push-pull rod 521 moves towards the connecting plate 51, thereby pushing the two sets of hinge plates 522 and causing the two sets of extrusion plates 53 to flip and fold. At the same time, when the guide block 513 moves to the extrusion section d of the guide groove 411, it will drive the connecting plate 51 to move the extrusion plate 53 further into the extrusion chamber. As the extrusion plate 53 flips and folds, and in conjunction with the two sets of dividing blocks 532, the dividing blocks 532 will first cut the algae mud clump into two halves. Then, the dividing blocks 532 flip and carry up half of the algae mud clump. During the flipping process, the algae mud clump is separated from the chain conveyor 2. When it moves to the horizontal section f, the extrusion plate 53 is completely away from the extrusion chamber, ensuring that the algae mud clump falls smoothly into the collection pool 9, thereby further ensuring that the algae mud clump can be smoothly separated from the chain conveyor 2.

[0030] like Figures 8-10 As shown, one end of the extrusion plate 53 is provided with a sealing plate 531. The sealing plates 531 on the two sets of extrusion plates 53 are symmetrical about the center point of the two sets of extrusion plates 53, and the two sets of sealing plates 531 block both ends of the extrusion chamber.

[0031] The drain hole 22 is located inside the extrusion chamber. A cavity 211 is provided inside the partition plate 21. Several drain holes 212 are provided between the cavity 211 and the extrusion chamber. Several leakage holes 23 connected to the cavity 211 are provided on the chain conveyor 2.

[0032] A baffle is provided inside the cavity 211, which divides the cavity 211 into two sets of movable chambers. Movable plates 25 are slidably installed inside the movable chambers. Several connecting holes 251 that communicate with the drainage holes 212 are opened on the movable plates 25. Magnetic components are provided on the side of the extrusion plate 53 that is in contact with the partition plate 21 and on the movable plates 25. The two sets of magnetic components are attracted to each other magnetically.

[0033] It should be noted that using only the squeezing dehydration method may cause the algae mud clumps to clog the drain holes 22. On the other hand, the algae mud clumps will be continuously compacted after being squeezed, and the internal drainage channels will become narrower and blocked. This will cause the algae mud clumps to be dry on the outside and wet on the inside, thereby reducing the dehydration effect.

[0034] In practical application, when the extrusion plate 53 moves into the extrusion chamber to extrude the algae mud clumps, part of the extruded wastewater is discharged through the drain hole 22, and the other part enters the cavity 211 through the drain hole 212 and is finally discharged from the leak hole 23. This improves the drainage effect and thus improves the dehydration effect. As the extrusion plate 53 moves out of the extrusion chamber, the magnetic attraction on the extrusion plate 53 and the movable plate 25 causes the extrusion plate 53 to move, thus misaligning the connecting hole 251 with the drain hole 212. This, combined with the extrusion plate 53 fitting against the partition plate 21 and the sealing plate 531 blocking both ends of the extrusion chamber, and the algae clumps being repeatedly extruded and rubbed, will block the drain hole 22. Thus, the extrusion chamber is in a near-sealed state. As the extrusion plate 53 continues to move, the extrusion chamber gradually becomes negatively oriented. Under negative pressure, the compacted algal clumps develop bubble nucleation and micro-cracks, causing them to expand in volume and decrease in density, forming a looser, more porous framework. This creates more favorable drainage channels for the next compression, allowing water to drain from the clumps and improving dehydration. Simultaneously, because cyanobacteria cells contain large amounts of water and gas, compression alone cannot expel them. When the pressure inside the compression chamber decreases, the pressure inside the cells remains relatively high, and the cell walls experience a significant pressure difference from the inside out, causing them to balloon outwards. The algae expand and rupture, causing a large number of cyanobacterial cell walls to be physically torn apart, releasing intracellular bound water, algal toxins, proteins, polysaccharides, and other intracellular substances, thus further improving the dehydration effect. Additionally, when the squeezing chamber is under negative pressure, because the drain hole 212 and both ends of the squeezing chamber are completely closed, only the algal clumps blocking the drain hole 22 are in a relatively active state. Thus, under negative pressure, the algal clumps blocking the drain hole 22 act like a piston, expanding and releasing the algae trapped inside. The mud clumps will gradually move into the squeezing chamber, thus preventing the algae mud clumps from clogging the drain hole 22 and ensuring the subsequent drainage effect. When the algae mud clumps are pulled out from the drain hole 22 or the two sets of magnetic suction parts are misaligned after the squeezing plate 53 moves, the negative pressure environment in the squeezing chamber disappears after air enters, and the movable plate 25 will return to its original position, thereby connecting the drain hole 212 with the connecting hole 251 so that wastewater can be discharged during the next squeezing. In summary, through reciprocating positive pressure squeezing and negative pressure expansion, the dehydration effect can be improved while preventing the drain hole 22 from clogging. In addition, under negative pressure, the microcystin and other toxic substances inside the cyanobacteria cells will be discharged during the next compression process after the cells rupture, thereby reducing the toxicity of the algal mud and making it more conducive to subsequent resource utilization (such as incineration, composting, etc.). The negative pressure process will extract the gases dissolved in the algal mud and some volatile odor substances (such as sulfides, ammonia, etc.), which will help reduce the odor problem during subsequent treatment.

[0035] Working principle: During operation, cyanobacteria on the water surface enter the flocculation tank 7 under the guidance of the traction robot 11 and the interception arm 10, where flocculant is added to form algal clumps. The drive roller 3 drives the chain conveyor 2 to run, and the algal clumps enter the extrusion chamber formed by adjacent partitions 21. The drive chain 31 drives the drive plate 511 to move through the sleeve frame 311, so that the extrusion mechanism 5 moves synchronously with the chain conveyor 2. In the feeding arc section a, the push-pull rod 521, under the action of the inner guide frame 42, keeps the two sets of extrusion plates 53 in a folded state, so as not to block the entry of cyanobacteria. When the push-pull rod 521 passes the feeding arc section a and enters the wave section b, the push-pull rod 521 moves outward and pulls the hinge plate 522 to cause the extrusion plate 53 to flip and unfold. At the same time, the guide block 513 enters the wave section b of the guide groove 411 of the outer guide frame 41, and drives the extrusion plate 53 to move back and forth into the extrusion chamber through the connecting plate 51, repeatedly extruding the algae mud clump. The water extruded is discharged through the drain hole 22, drain hole 212, connecting hole 251 and leakage hole 23. The trough of the wave section b gradually deepens, and the extrusion force gradually increases. When the guide block 513 slides into the arc groove 413, the two sets of extrusion plates 53 move alternately to rub the algae mud clump, and with the help of the convex strip 24, the algae mud clump is loosened. When the extrusion plate 53 moves out of the extrusion chamber, the magnetic attraction on it attracts the movable plate 25, causing the connecting hole 251 to be misaligned with the drainage hole 212. At the same time, the sealing plate 531 seals both ends of the extrusion chamber, creating a negative pressure inside the extrusion chamber. The algae mud clumps expand and loosen, and the blue-green algae cells rupture, releasing bound water. The algae mud blocking the drainage hole 22 is extracted by the negative pressure, achieving self-cleaning of the drainage hole 22. When the push-pull rod 521 passes the feeding arc section c and enters the extrusion section d, the push-pull rod 521 moves inward, pushing the hinge plate 522 to flip and fold the extrusion plate 53. At the same time, the guide block 513 drives the extrusion plate 53 to move further into the extrusion chamber. The dividing block 532 cuts the algae mud clumps and helps them fall off. The dehydrated algae mud clumps fall into the collection tank 9.

[0036] A method for restoring a lake water ecological restoration device, the method being applied to the lake water ecological restoration device as described above, the method comprising the following steps: Step S1: Blue-green algae introduction and flocculation. Blue-green algae on the water surface are introduced into the flocculation tank 7 by the traction robot 11 and the interception arm 10 and flocculant is added to make the blue-green algae flocculate into algal mud. Step S2: The algae mud is lifted and conveyed, driving the chain conveyor 2 to run, so that the algae mud clumps enter the extrusion chamber, and the extrusion mechanism 5 moves synchronously with the chain conveyor 2; Step S3: Extrusion and dehydration. When the extrusion mechanism 5 moves along the guide rail 4, it drives the extrusion plate 53 to flip and unfold, and reciprocates to extrude and dehydrate the algae mud clumps. The extruded water is discharged. Step S4: Negative pressure deep dehydration and self-cleaning. When the extrusion plate 53 returns, it closes the extrusion chamber to form negative pressure. The algal mud clump expands and loosens, the blue-green algae cells rupture and release bound water, and the blocked drainage holes 22 achieve self-cleaning. Step S5: Material separation. When the extrusion mechanism 5 moves to the material feeding section, the extrusion plate 53 flips and folds to cut the algae mud clumps, assisting in the separation of the algae mud clumps from the chain conveyor 2. The dehydrated algae mud clumps fall into the collection tank 9.

Claims

1. A lake water ecological restoration device, comprising a hull (1), a flocculation tank (7), an outer shell (8), a collection tank (9), an interception arm (10), and a traction robot (11), characterized in that, The device further includes: Chain conveyor (2), the chain conveyor (2) is installed inside the housing (8), the housing (8) is equipped with a drive roller (3) for driving the chain conveyor (2), the chain conveyor (2) is in an inclined state, its inclined bottom end extends into the flocculation tank (7), its inclined top end is located at the collection tank (9), and the chain conveyor (2) is provided with several drainage holes (22). Guide rail (4), two sets of guide rails (4) are symmetrically installed inside the outer shell (8); The extrusion mechanism (5) is provided on the chain conveyor (2) with several partitions (21). An extrusion chamber is formed between adjacent partitions (21). The extrusion mechanism (5) is installed in the extrusion chamber. The extrusion mechanism (5) includes a connecting plate (51), a flipping part (52) and an extrusion plate (53). The connecting plate (51) is provided in four sets. Every two sets of connecting plates (51) are slidably connected to a set of guide rails (4). A drive plate (511) is slidably installed on the side of the connecting plate (51). Two sets of drive rollers (3) are symmetrically connected at both ends. The transmission chain (31) is provided with several sleeve frames (311). Two sets of drive plates (511) on the same side extend into the sleeve frames (311). Two sets of connecting plates (51) on different sides are rotatably connected to the extrusion plates (53). Two sets of connecting plates (51) on the same side are movably installed with a flipping part (52). One end of the flipping part (52) is slidably connected to the guide rail (4), and the other end is rotatably connected to the two sets of extrusion plates (53). The guide rail (4) drives the two sets of extrusion plates (53) to extrude the flocculated blue algae in the extrusion chamber. Support frame (6), the outer shell (8) is provided with support frame (6), the support frame (6) is located inside the chain conveyor (2) and supports the top of the chain conveyor (2).

2. The lake water ecological restoration device according to claim 1, characterized in that, The guide rail (4) includes an outer guide frame (41) and an inner guide frame (42). The outer guide frame (41) is used to drive the extrusion plate (53) to extrude the flocculated blue algae in the extrusion chamber. The inner guide frame (42) drives the flipping component (52) to flip the two sets of extrusion plates (53) to a horizontal or vertical state. Both the outer guide frame (41) and the inner guide frame (42) include a feeding arc section, a wave section, a discharging arc section, an extrusion section, a sinking section, and a horizontal section. The extrusion section, sinking section, horizontal section, and feeding arc section on the inner guide frame (42) are located inside the extrusion section, sinking section, horizontal section, and feeding arc section on the outer guide frame (41). Two sets of guide grooves (411) are opened on the inner side of the outer guide frame (41). Guide blocks (513) are staggered on the two sets of connecting plates (51) on the same side. The guide blocks (513) slide with the guide grooves (411).

3. The lake water ecological restoration device according to claim 2, characterized in that, The guide groove (411) has an outer protrusion (412) at the wave section. The outer protrusions (412) in the two sets of guide grooves (411) on the same side face away from each other. The guide groove (411) forms an arc groove (413) at the position of the outer protrusion (412). When the guide block (513) moves to the arc groove (413), the two sets of extrusion plates (53) move alternately to flocculate and condense blue algae. The extrusion chamber of the chain plate conveyor (2) is provided with several protrusions (24) perpendicular to the partition plate (21).

4. The lake water ecological restoration device according to claim 2, characterized in that, The flipping component (52) includes a push-pull rod (521) and a hinge plate (522). A movable groove (512) is provided between two sets of connecting plates (51) on the same side. The push-pull rod (521) is located in the movable groove (512). One end of the push-pull rod (521) is slidably engaged with the inner guide frame (42), and the other end is equipped with two sets of hinge plates (522). The hinge plate (522) is hinged to the extrusion plate (53). A notch (514) is provided on the connecting plate (51) for the hinge plate (522) to move. The two sets of extrusion plates (53) are symmetrically provided with dividing blocks (532).

5. The lake water ecological restoration device according to claim 4, characterized in that, One end of the extrusion plate (53) is provided with a sealing plate (531). The sealing plates (531) on the two sets of extrusion plates (53) are symmetrical about the center point of the two sets of extrusion plates (53), and the two sets of sealing plates (531) block both ends of the extrusion chamber.

6. The lake water ecological restoration device according to claim 5, characterized in that, The drain hole (22) is located inside the extrusion chamber. A cavity (211) is provided inside the partition plate (21). Several drain holes (212) are provided between the cavity (211) and the extrusion chamber. Several leakage holes (23) communicating with the cavity (211) are provided on the chain conveyor (2).

7. The lake water ecological restoration device according to claim 6, characterized in that, The cavity (211) is provided with a baffle, which divides the cavity (211) into two sets of movable cavities. Movable plates (25) are slidably installed in the movable cavities. Several connecting holes (251) communicating with the drainage holes (212) are opened on the movable plates (25). Magnetic components are provided on the side of the extrusion plate (53) that is in contact with the partition (21) and on the movable plates (25). The two sets of magnetic components are magnetically attracted to each other.

8. A method for restoring a lake water body ecological restoration device, characterized in that, The method is applied to the lake water ecological restoration device as described in any one of claims 1-7 above, and the method includes the following steps: Step S1: Blue-green algae introduction and flocculation. Blue-green algae on the water surface are introduced into the flocculation tank (7) by a traction robot (11) and an interception arm (10) and flocculant is added to make the blue-green algae flocculate into algal mud. Step S2: The algae mud is lifted and conveyed, and the chain conveyor (2) is driven to run, so that the algae mud clumps enter the extrusion chamber, and the extrusion mechanism (5) moves synchronously with the chain conveyor (2); Step S3: Squeeze and dewater. When the squeezing mechanism (5) moves along the guide rail (4), it drives the squeezing plate (53) to flip and unfold and reciprocate to squeeze and dewater the algae mud clumps, and the squeezed water is discharged. Step S4: Negative pressure deep dehydration and self-cleaning. When the extrusion plate (53) returns, it closes the extrusion chamber to form negative pressure. The algal mud ball expands and loosens, the blue algae cells break and release bound water, and the blocked drainage hole (22) achieves self-cleaning. Step S5: Material separation. When the extrusion mechanism (5) moves to the material feeding section, the extrusion plate (53) flips and folds in half and cuts the algae mud clumps, which helps the algae mud clumps separate from the chain conveyor (2). The dehydrated algae mud clumps fall into the collection tank (9).

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