A sludge dewatering and solidification apparatus and method

Abstract

The application discloses a kind of sludge dewatering solidification device and method, it is related to sludge dewatering technical field.The device includes bag body, three-dimensional drainage framework, isolation layer, external constraint component, bottom support component and top frame component.Bag body is three-dimensional cavity structure, and first bag part and second bag part form separable structure by zipper;Three-dimensional drainage framework contains filter pad, dewatering strip and hanging rod, and dewatering strip forms dense surface shape vertical multilayer drainage curtain;Isolation layer is rubber plate, and is fixed in bag body inner wall by second magic tape, for protecting zipper;External constraint component contains annular constraint grid and protective net, bottom support component contains long strip cushion and support mesh, and top frame component is fixed hanging rod by latch positioning.The application can solve the problems of low dewatering efficiency, complicated disassembly and assembly, difficult soil removal and low reuse rate of traditional technology, with the characteristics of modularization, quick assembly, three-dimensional efficient drainage, convenient soil removal and easy maintenance and reuse, suitable for engineering site operation.

Description

Technical Field

[0001] This invention relates to the field of sludge dewatering technology, specifically to a sludge dewatering and solidification device and method. Background Technology

[0002] In the field of sludge dewatering and solidification, geotextile tube dewatering method has become a commonly used method due to its advantages of low cost and good filtration effect, such as the vertical geotextile tube technology with application publication number CN101993184A. However, this type of existing technology still has defects in the following two aspects: Firstly, the internal drainage structure has shortcomings: 1. Drainage pipes are mostly linear or point-like in layout. Water needs to penetrate laterally into the pipe body to be discharged, resulting in blind spots in drainage. Water flow needs to converge radially over long distances, leading to long paths, high migration resistance, and low dewatering efficiency. 2. Traditional drainage pipes only serve the function of water collection and transportation, relying on an external filter membrane to prevent particle intrusion. Once the filter membrane is damaged or the joints fail, particles will enter the pipe, causing permanent and difficult-to-clean internal blockage. In particular, they have poor adaptability to high-viscosity soils, and particle blockage is prone to occur during application, which will further reduce dewatering efficiency and make it difficult to optimize the dewatering cycle. 3. Insufficient structural stability. Traditional drainage pipes are passive drainage components and do not participate in structural stress, so they cannot effectively transfer the soil's self-weight load to the external support structure. 4. During the sludge filtration and solidification process, uneven settlement may occur. Traditional rigid drainage pipes are prone to breakage or joint detachment due to bending moments generated by differential settlement, resulting in interruption of the drainage path and difficulty in repair.

[0003] Secondly, the external system is cumbersome to disassemble and assemble: 1. The installation process of the support is complicated. It is necessary to fix the vertical support first, and then connect the horizontal rings layer by layer. Not only does it require high positioning accuracy, but the process is also relatively complicated. 2. The connection operation is time-consuming and labor-intensive. The geotextile bag and the horizontal geotextile need to be clamped by multiple sets of arc-shaped pressure strips and clamps. Both installation and disassembly rely on professional machinery, resulting in low operating efficiency and difficulty in meeting the needs of rapid turnover on the construction site.

[0004] In summary, existing technologies still have significant limitations in terms of dewatering efficiency, ease of assembly and disassembly, convenient soil removal, and maintenance and reusability. Therefore, developing a dewatering and solidification device with features such as three-dimensional high-efficiency drainage, modular rapid assembly, convenient soil separation and extraction, stability and reliability, and easy maintenance and reusability is of practical significance and engineering application value. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art, and to this end, a sludge dewatering and solidification device and method are proposed.

[0006] The technical solution of this invention to solve the technical problem is as follows: In a first aspect, the present invention provides a sludge dewatering and solidification device, comprising at least: A bag with an open top and capable of filtering water, wherein the bag is a three-dimensional cavity structure with internal storage space; The storage space is equipped with a three-dimensional drainage frame; wherein, the three-dimensional drainage frame includes: A flexible filter pad, wherein the filter pad is detachably connected to the inner bottom of the bag body; Several spaced-apart dewatering strips serve as vertical drainage channels, with their bottom ends connected to the upper surface of the filter pad. Multiple spaced-apart hanging rods are erected above the bag body, and the top of the dehydration strip is connected to the hanging rods, so that the dehydration strip is in a vertical state; the multiple dehydration strips divide the storage space inside the bag body into multiple independent and connected areas, forming a dense planar vertical multi-layer drainage curtain.

[0007] Preferably, the bag body includes a first bag section and a second bag section, which are connected by a zipper to form a detachable structure.

[0008] Preferably, the bag body is further provided with an isolation layer, the isolation layer including a flexible rubber sheet, the rubber sheet is arranged along the circumference of the bag body and connected to the inner wall of the bag body by a second Velcro; the flexible rubber sheet has a groove along its length for accommodating the lower wing plate of the zipper pull, the lower wing plate of the zipper pull can move left and right along the groove to realize the opening and closing of the first bag part and the second bag part; one end of the rubber sheet is a trapezoidal end, and the other end has a clip interface, the trapezoidal end can be inserted into the clip interface, so that the flexible rubber sheet forms a ring structure with staggered ends.

[0009] Preferably, it also includes an external restraint assembly, which includes a circumferential restraint grid and a protective net. The circumferential restraint grid is fitted over the outside of the bag and is tightly attached to the outer wall of the bag. The protective net is connected end to end to form a ring structure and is fitted over the circumferential restraint grid. The hanging rod is detachably connected to the top of the protective net.

[0010] Preferably, the filter pad is connected to the inner bottom of the bag body by a first Velcro fastener. The first Velcro fastener includes a first hook side and a first textured side that are adapted to each other. The first hook side is fixed to the lower surface of the filter pad, and the first textured side is fixed to the inner bottom wall of the bag body.

[0011] Preferably, it also includes a bottom support assembly for supporting the bag body, the bottom support assembly including a plurality of long strip pads laid at intervals on the support surface, the bottom end of the protective net being detachably connected to the long strip pads; a support mesh is laid on top of the long strip pads, and the bottom of the bag body is pressed on the support mesh, so that the bottom of the bag body forms a gap with the support surface.

[0012] Preferably, the hanging rod is connected to the protective netting via a top frame assembly. The top frame assembly includes several spaced-apart support ribs, both ends of which are detachably connected to the top of the protective netting. Symmetrical square tubes are provided above the support ribs, with a through slot on one side of each tube. The square tube also has a vertical through hole, where a pin is inserted. Positioning holes are provided at both ends of the hanging rod, allowing the end of the hanging rod to pass through the slot and move along it. The bottom end of the pin can be inserted into the positioning hole.

[0013] Preferably, the pin includes a head, a pin body, and a tail connected sequentially from top to bottom. The head is exposed at the top of the square tube, and a spring is sleeved on the pin body. One end of the spring is connected to the inner wall of the square tube, and the other end is connected to the tail. The tail can be fitted and inserted into the positioning hole.

[0014] Preferably, a rubber strip is connected to the top of the protective net along the circumferential direction; the top of the bag body is turned outward and fitted onto the rubber strip; the top frame assembly is pressed against the top of the bag body.

[0015] Secondly, this invention proposes a method for using a sludge dewatering and solidification device, comprising the following steps: S1, Bottom support component installation: The construction site is leveled, and several long strip blocks are laid parallel and spaced on the leveled bearing surface. Then, the support mesh is laid flat on top of the long strip blocks. S2, External restraint component installation: Place the circumferential restraint grid on the support mesh; lay the protective net along the circumference of the circumferential restraint grid, connect the two ends of the protective net to form a ring structure, and then connect the bottom of the protective net to the long strip pad; fix the rubber strip along the circumference of the top of the protective net. S3, Install the bag body: S31, Assemble the bag body: Connect the first bag section and the second bag section with a zipper to form a complete bag body; S32, Install the isolation layer: Lay a rubber sheet along the circumference of the zipper, and fix the rubber sheet to the inner wall of the bag body with the second Velcro, so that the trapezoidal end of the rubber sheet is inserted into the jacket interface to form a ring structure with the ends overlapping, ensuring that the lower wing plate of the zipper head is accommodated in the groove of the rubber sheet and slides smoothly. S33. Bag positioning: Place the bag with the isolation layer into the circumferential constraint grid; fold the top of the bag outwards and place it onto the rubber strip; S4, Install the three-dimensional drainage frame: Pre-connect one end of the dewatering strip to the filter pad according to the designed spacing, and connect the hanging rod to the other end of the dewatering strip; S5, install top frame component: S51, Connection between square tube and hanging rod: Take two square tubes, adjust the position of the hanging rod so that the end of the hanging rod passes through the groove of the square tube, and connect the positioning hole at the end of the hanging rod with the corresponding pin of the square tube to complete the fixing; S52, Lifting: Lift the entire assembly described above so that the filter pad is placed into the storage space and connected to the bottom of the bag via the first Velcro strap; maintain the lifting position to ensure that the dewatering strips are upright; S53, Installation of support bars: Install support bars on the top of the protective netting according to the design spacing. Insert the support bars into the bottom of the square tube and connect them to the square tube. Then connect both ends of the support bars to the protective netting. After installation, release the hoisting constraints. S6, sludge filling and dewatering: The sludge to be treated is pumped into the bag body. The water in the sludge quickly permeates to the outside of the bag body and is discharged through the drainage curtain formed by the dewatering strip. The solid particles in the sludge are intercepted by the bag body and finally form solidified soil. S7, Soil Removal and Device Recovery: After dewatering, disassemble the top frame assembly; remove the external protective net and circumferential restraint grid; open the zipper, and then pull up the first bag to separate it from the second bag, so that the solidified soil is fully exposed; after the solidified soil is removed, clean and maintain the bag and the three-dimensional drainage frame for reuse.

[0016] The above technical solution has the following advantages or beneficial effects: 1. This invention, by setting up a three-dimensional drainage framework, forms a dense, planar, vertical, multi-layered drainage curtain, which can effectively solve the drainage blind spot problem caused by the linear / point layout of traditional drainage pipes. With this invention, water can quickly permeate and converge through the surrounding dehydration strips without long-distance radial migration, significantly shortening the water flow path, reducing migration resistance, and effectively improving dehydration efficiency.

[0017] 2. The dewatering strip itself serves as both a drainage channel and a filter medium, achieving integrated "drainage-filtration" functions. Water is discharged through the gaps between the fibers of the dewatering strip, while solid particles are effectively trapped on the outside of the strip. Even if fine particles adhere to the surface and form a temporary mud film, it only occurs on easily observable and cleanable surfaces, and performance can be restored with simple rinsing, resulting in extremely low maintenance costs. Furthermore, the three-dimensional drainage frame not only undertakes water collection and transportation functions but also participates in structural load-bearing as a load-bearing component. It can transfer the self-weight load of the silt to the external protective net and bottom support components, solving the problem of traditional drainage pipes passively draining water and not participating in load-bearing, effectively improving operational stability.

[0018] 3. The external constraint components achieve rapid enclosure through a combination of protective netting and circumferential constraint grids. The top frame components adopt a square tube and pin positioning structure, which can quickly adjust and fix the position of the hanging rod. The bag body is connected by zippers, and the filter pad and the bottom of the bag body, as well as the isolation layer and the inner wall of the bag body, are detachably connected by Velcro. This solves the problem of cumbersome installation of existing devices. The modular design simplifies the disassembly and assembly process and adapts to the needs of rapid turnover on site.

[0019] 4. The bag body adopts a detachable structure. After dehydration, simply open the zipper to fully expose the solidified soil, avoiding secondary disturbance to the soil and damage to the device during soil extraction using traditional devices. At the same time, the main components such as the three-dimensional drainage frame, bag body, and external constraint components are all detachable and can be reused after cleaning and maintenance. This solves the problems of easy wear and tear, difficult maintenance, and low reuse rate of traditional devices, significantly reducing consumable costs and equipment investment.

[0020] 5. The isolation layer designed in this invention uses a groove on the rubber plate to accommodate the lower wing plate of the slider, forming an isolation barrier between the slider and the silt. This prevents the slider from being solidified in the solidified soil and unable to move due to silt contact. Furthermore, the rubber plate employs a trapezoidal end-to-end overlapping design with the jacket interface, forming a sealed ring structure to prevent silt from seeping into the slider from the rubber plate joints and contaminating it, further improving the protective effect. This isolation layer is detachably connected to the inner wall of the bag via a second Velcro strap, facilitating installation and maintenance. Combined with the detachable zippered bag body, removing the solidified soil simply requires unzipping, significantly improving operational convenience. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0022] Figure 1 This is an exploded view of the sludge dewatering and solidification device proposed in this invention (top frame components omitted).

[0023] Figure 2 yes Figure 1 Enlarged view of the structure of the middle bag.

[0024] Figure 3 yes Figure 1 A three-dimensional view of the three-dimensional drainage frame.

[0025] Figure 4 yes Figure 3 Side view of the three-dimensional drainage frame.

[0026] Figure 5 This is a top view (with top frame assembly) of the sludge dewatering and solidification device proposed in this invention.

[0027] Figure 6 This is a cross-sectional view of the top frame assembly and the hanging rod not yet in place.

[0028] Figure 7 yes Figure 6 Enlarged view of the structure of the middle pin and spring.

[0029] Figure 8 This is a three-dimensional structural diagram of a square tube.

[0030] Figure 9 This is a cross-sectional view of the structure when the rubber sheet and the pull head are in contact.

[0031] Figure 10 This is a cross-sectional view of the jacketed interface of the rubber sheet.

[0032] Figure 11 This is a schematic diagram of a structure where the two ends of a rubber sheet are joined together to form a staggered, overlapping joint.

[0033] Explanation of reference numerals in the attached figures: 1. Bag body; 110. First bag section; 120. Second bag section; 13. Zipper; 131. Zipper pull; 1311. Lower wing plate; 2. Circumferential restraint grid; 3. Protective net; 4. Supporting mesh; 5. Long strip pad; 6. Liner; 7. Three-dimensional drainage frame; 71. Filter pad; 72. Dehydration strip; 73. Hanging rod; 731. Positioning hole; 74. Braided rope; 8. Supporting rib; 9. Square tube; 91. Groove; 92. Through hole; 10. Pin; 101. Head; 102. Pin body; 103. Tail; 11. Spring; 12. Rubber plate; 121. Groove; 122. Clip interface; 14. Second Velcro. Detailed Implementation

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] like Figure 1 - Figure 11 As shown, this embodiment proposes a sludge dewatering and solidification device, which includes at least: The bag 1 has an open top and is capable of filtering water. The bag 1 is a three-dimensional cavity structure with internal storage space. The top opening design facilitates the filling of the sludge to be treated and the subsequent removal of the solidified soil. The water filtering characteristics enable water to quickly permeate and drain. A three-dimensional drainage frame 7 is set in the storage space to achieve the dual purpose of efficient drainage and structural support.

[0036] The specific structure of the three-dimensional drainage frame 7 mainly includes the following three parts: Part 1: Flexible filter pad 71, which has both water filtration and load-bearing functions. The filter pad 71 is detachably connected to the inner bottom of the bag body 1. Specifically, the filter pad 71 is connected to the inner bottom of the bag body 1 by a first Velcro fastener. The first Velcro fastener includes a first hook side and a first textured side that are compatible with each other. The first hook side is fixed to the lower surface of the filter pad 71, and the first textured side is fixed to the inner bottom wall of the bag body 1. This method has the advantage of convenient assembly and disassembly.

[0037] Part Two: Several spaced dewatering strips 72, made of high-permeability, anti-clogging flexible filter material, serve as vertical drainage channels. Their bottom ends are connected to the upper surface of the filter pad 71. They are arranged at preset intervals to ensure the stability of the drainage path.

[0038] In some feasible solutions, the dewatering strip 72 can be made from geotextile and can be 10cm wide. The dewatering strip 72 serves as both a drainage channel and a filter medium, integrating drainage and filtration functions. Water is discharged through the gaps between the fibers of the dewatering strip 72, while solid particles are effectively trapped on the outside of the strip. Even if fine particles adhere to the surface and form a temporary mud film, it only occurs on easily observable and cleanable surfaces, and performance can be restored with simple rinsing, resulting in extremely low maintenance costs. Furthermore, the flexible dewatering strip 72 can deform in coordination with the soil, maintaining the continuity and functionality of the drainage channel even during significant uneven settlement, significantly enhancing the system's robustness.

[0039] Part Three: Multiple spaced-apart hanging rods 73 are erected above the bag body 1. The tops of the dehydration strips 72 are connected to the hanging rods 73, making the dehydration strips 72 vertical. The multiple dehydration strips 72 divide the storage space inside the bag body 1 into multiple independent but interconnected areas, forming a dense, planar, vertical, multi-layered drainage curtain. The multiple dehydration strips 72 work synergistically to significantly shorten the moisture penetration and migration path, improving dehydration efficiency.

[0040] The above solution has the following advantages: By setting up a three-dimensional drainage frame 7, a dense, planar, vertical, multi-layered drainage curtain is formed, which can effectively solve the drainage blind spot problem caused by the linear / point layout of traditional drainage pipes. With this invention, water can quickly permeate and converge through the surrounding dewatering strips 72 without long-distance radial migration, significantly shortening the water flow path, reducing migration resistance, and effectively improving dewatering efficiency. In addition, the three-dimensional drainage frame 7 not only undertakes the function of water collection and transportation, but also participates in structural bearing as a load-bearing component. It can transfer the self-weight load of silt to the external protective net 3 and the bottom support components, solving the problem of passive drainage and non-participation in load bearing in traditional drainage pipes, and effectively improving operational stability.

[0041] In some embodiments, the bag body 1 adopts a modular and separable design, comprising a first bag section 110 and a second bag section 120, which are connected by a zipper 13 to form a separable structure. This separable structure design can meet the needs of rapid soil extraction on the engineering site: after dehydration and solidification, there is no need to destructively disassemble the bag body 1; simply pulling the zipper 13 can separate the first bag section 110 from the second bag section 120, exposing the solidified soil inside, which is beneficial for subsequent soil extraction.

[0042] In some embodiments, considering that the zipper 13 is in direct contact with the sludge, especially the zipper pull 131 after the sludge has solidified, it may become stuck and unable to open and close normally. To solve the problem that the zipper 13 is easily stuck during the sludge filling and solidification process or cannot be opened and closed flexibly after solidification, an isolation layer is also provided inside the bag body 1. The isolation layer includes a flexible rubber plate 12, which is made of a rubber material that is highly elastic, wear-resistant, and does not easily adhere to sludge. It can adapt to the deformation of the bag body 1 during the filling process and can withstand the erosion of sludge for a long time. The rubber plate 12 is arranged around the circumference of the bag body 1 and connected to the inner wall of the bag body 1 by a second Velcro 14. For example, a second hook surface is provided inside the bag body 1, and a matching second rough surface is provided on the inner side of the rubber plate 12. This connection method does not require additional tools, which is convenient for installation and positioning, and can also be quickly disassembled and replaced after the rubber plate 12 is worn, greatly improving the convenience of maintenance.

[0043] To ensure the normal opening and closing function of the zipper 13, the flexible rubber plate 12 has a groove 121 along its length to accommodate the lower wing plate 1311 of the zipper head 131. The lower wing plate 1311 of the zipper head 131 can move left and right along the groove 121 to realize the opening and closing of the first pocket section 110 and the second pocket section 120. The lower wing plate 1311 of the zipper head 131 can be completely accommodated in the groove 121, and the inner wall of the groove 121 is smoothed to minimize the frictional resistance when the zipper head 131 slides, ensuring that the opening and closing operation of the first pocket section 110 and the second pocket section 120 is smooth and unobstructed. Meanwhile, in order to achieve the ring-shaped closure and sealing protection of the rubber plate 12, one end of the rubber plate 12 is a trapezoidal end, and the other end has a jacket interface 122. The trapezoidal end can be inserted into the jacket interface 122, so that the flexible rubber plate 12 forms a ring structure with staggered ends. This overlapping method can minimize the seepage of sludge from the joint of the rubber plate 12 into the groove 121 to contaminate the zipper 131, further improving the isolation and protection effect of the zipper 13, and ensuring that the zipper 13 can still maintain flexible opening and closing performance when the device is used for a long time or when dealing with high viscosity sludge.

[0044] In some embodiments, to ensure the structural stability of the bag 1 during the sludge filling and dewatering process, an external constraint component is also included. The external constraint component includes a circumferential constraint grid 2 and a protective net 3. The circumferential constraint grid 2 is made of high-strength modified plastic or lightweight metal material, which has good rigidity and deformation resistance. The circumferential constraint grid 2 is fitted on the outside of the bag 1 and is tightly attached to the outer wall of the bag 1. It can effectively limit the radial expansion of the bag 1 caused by the weight of the sludge inside, and at the same time distribute the load evenly to the overall structure, avoiding local stress concentration that could cause the bag 1 to break.

[0045] The protective netting 3, with its ends connected to form a ring structure, is fitted over the circumferential restraint grid 2. It can be made of high-tensile-strength polyester woven mesh or steel wire mesh. The ends are quickly connected using buckles, straps, or bolts, forming a closed ring structure that serves as secondary reinforcement, preventing displacement of the circumferential restraint grid 2, and protecting the bag 1 from external impact damage. The hanging rod 73 is detachably connected to the top of the protective netting 3, for example, by using wire or straps for quick assembly, disassembly, and position adjustment, while also providing stable top support for the three-dimensional drainage frame 7.

[0046] In some embodiments, a bottom support assembly for supporting the bag body 1 is also included. The bottom support assembly provides a stable support foundation for the device and ensures smooth drainage at the bottom of the bag body 1. The bottom support assembly includes a number of long strip blocks 5 laid at intervals on the bearing surface. The long strip blocks 5 can be made of concrete structure or sleepers. The bottom end of the protective net 3 is detachably connected to the long strip blocks 5, for example by means of straps or bolts, to ensure that the external restraint assembly and the bottom support assembly form a stable load-bearing whole. A support mesh 4, such as metal mesh or reinforced plastic mesh, is laid on top of the long strip blocks 5. The support mesh 4 has good load-bearing capacity and water permeability. The bottom of the bag body 1 is pressed on the support mesh 4, so that the bottom of the bag body 1 forms a gap with the bearing surface. This gap design avoids drainage blockage caused by direct contact between the bottom of the bag body 1 and the bearing surface, allowing water that has seeped into the bottom of the bag body 1 from the sludge to be quickly discharged through the gap between the mesh of the support mesh 4 and the long strip pad 5, further improving the overall dewatering efficiency. At the same time, the support mesh 4 can distribute the weight of the bag body 1 and the sludge inside, preventing excessive local pressure from causing the bag body 1 to break.

[0047] The above design solves the problem of traditional drainage components only draining water and not bearing load, giving the three-dimensional drainage frame 7 a load-bearing function: when the bag 1 is filled with silt, the vertical pressure and lateral squeezing force generated by the silt's own weight will act on the densely distributed dewatering strips 72, and the top of the dewatering strips 72 is firmly connected to the hanging rods 73, allowing these loads to be quickly transferred to the top of the protective net 3 through the hanging rods 73. As the core load-bearing component of the external constraint assembly, the protective net 3, through the detachable connection between its bottom and the long strip pads 5, further evenly distributes the load to the bottom support assembly, ultimately forming a complete load-bearing system of silt - dewatering strips 72 - hanging rods 73 - protective net 3 - bottom support assembly. This load transfer path not only effectively mitigates the risk of local compression of the bag body 1 by the weight of the sludge, preventing the bag body 1 from being damaged or deformed due to uneven stress, but also enhances the structural stability of the entire device during the sludge dewatering and solidification process through the active force participation of the three-dimensional drainage frame 7. Even if uneven sludge settlement occurs, the reliable connection between the hanging rod 73 and the protective net 3 can adapt to the settlement difference through slight deformation, ensuring that the load transfer is not interrupted, while maintaining the upright state of the dewatering strip 72 and ensuring that the drainage efficiency is not affected.

[0048] In some embodiments, the hanging rod 73 is connected to the protective net 3 through a top frame assembly. The top frame assembly provides a stable and adjustable support carrier for the hanging rod 73, and at the same time achieves a firm connection with the protective net 3. The top frame assembly includes a number of spaced support ribs 8. The support ribs 8 can be made of steel bars or high-strength lightweight profiles. The two ends of the support ribs 8 are detachably connected to the top of the protective net 3. The two ends of the support ribs 8 can be directly laid on the top of the protective net 3, or they can be fixed with binding wire or straps.

[0049] A symmetrical square tube 9 is provided above the support rib 8. A through slot 91 is opened on one side of the square tube 9. The width of the slot 91 is adapted to the size of the end of the hanging rod 73, providing room for adjustment of the position of the hanging rod 73. The square tube 9 also has vertical through holes 92, which are spaced apart along the length direction. A pin 10 is inserted into the through hole 92. Positioning holes 731 are opened at both ends of the hanging rod 73. The end of the hanging rod 73 can pass through the slot 91 and move along the slot 91. The bottom end of the pin 10 can be inserted into the positioning hole 731. During installation, the end of the hanging rod 73 can pass through the slot 91 and slide flexibly along the slot 91. After adjusting to the design position, the bottom end of the pin 10 is aligned with the positioning hole 731 and inserted to quickly fix the hanging rod 73. This design allows for flexible adjustment of the spacing between the hanging rods 73 to accommodate different densities of the dewatering strips 72, while the rigid connection between the pins 10 and the positioning holes 731 ensures that the hanging rods 73 do not shift when bearing silt loads, thus guaranteeing the upright stability of the three-dimensional drainage frame 7.

[0050] In some embodiments, the pin 10 is made of wear-resistant and rust-proof material. The pin 10 includes a head 101, a pin body 102 and a tail 103 connected in sequence from top to bottom. The head 101 is exposed on the top of the square tube 9, which facilitates quick manual operation. A spring 11 is sleeved on the pin body 102. One end of the spring 11 is connected to the inner wall of the square tube 9 and the other end is connected to the tail 103. The tail 103 is designed as a conical or cylindrical positioning structure with dimensions that are adapted to the positioning hole 731 of the hanging rod 73. The tail 103 can be fitted into the positioning hole 731 to achieve a tight fit. In the assembled state, the spring 11 is in a compressed state, continuously pushing the tail 103 downward to extend and embed into the positioning hole 731, ensuring that the pin 10 and the hanging rod 73 are firmly connected; when it is necessary to adjust the position of the hanging rod 73, simply pull the head 131 upward to drive the tail 103 out of the positioning hole 731, thereby unlocking the movement restriction of the hanging rod 73. The operation is convenient and efficient, greatly improving the flexibility of device assembly and adjustment.

[0051] In some embodiments, a rubber strip is connected circumferentially to the top of the protective net 3 to provide flexible protection between the top of the protective net 3 and the bag body 1, preventing sharp edges or rigid structures of the protective net 3 from puncturing the bag body 1. The protective net 3 is typically made of high-strength woven mesh or wire mesh, and its top edge may have burrs or sharp angles after cutting. Furthermore, the top frame assembly will exert continuous pressure on the top of the bag body 1 after installation. Direct contact can easily lead to wear and breakage of the filter material in the bag body 1, affecting the sealing performance and service life of the device.

[0052] During installation, the top of bag 1 is folded outwards and fitted onto the rubber strip, while the top frame assembly presses down on the top of bag 1, achieving a stable fixation of the top of bag 1 without the need for additional support devices. The top frame assembly itself forms a stable top frame through the detachable connection between the support ribs 8 and the protective netting 3. Its holding force can act on the circumference of the top of bag 1, ensuring that the top opening of bag 1 always maintains a relatively regular shape, effectively preventing the problem of the top of bag 1 collapsing, deforming, or the opening shrinking due to internal pressure during sludge filling. Through the combination of the holding action of the top frame assembly and the folded-out fitting structure of bag 1, the regularity of the opening is naturally maintained while achieving fixation, simplifying the installation process and adapting to the needs of modular rapid assembly. At the same time, the elastic deformation capability of the rubber strip can buffer the holding force of the top frame assembly, avoiding damage to bag 1 caused by hard contact, further ensuring the structural integrity of bag 1. The above-mentioned designs work together to solve the dual needs of fixing the top of bag 1 and preventing punctures, while eliminating the need for additional support steps, greatly improving construction efficiency.

[0053] Secondly, this invention proposes a method for using a sludge dewatering and solidification device, comprising the following steps: S1, Installation of bottom support components: Level the construction site, remove surface debris and gravel, and compact the surface to ensure that the bearing surface is flat and firm, so as to avoid uneven stress on the device due to uneven ground. Lay several long strip blocks 5 in parallel at intervals on the leveled bearing surface, and then lay the support mesh 4 on top of the long strip blocks 5 to ensure that the mesh covers completely without wrinkles. If necessary, a pad 6 can be laid on the ground first, and then the long strip blocks 5 can be installed.

[0054] S2, External restraint component installation: Place the circumferential restraint grid 2 on the support mesh 4, ensuring that the center of the circumferential restraint grid 2 is aligned with the preset device position; lay the protective net 3 along the circumference of the circumferential restraint grid 2, connect the two ends of the protective net 3 to form a ring structure, and then connect the bottom of the protective net 3 to the long strip pad 5 to ensure that the external restraint component and the bottom support component form a stable whole; fix the rubber strip along its circumference on the top of the protective net 3 to provide flexible support for the subsequent top cover of the bag body 1.

[0055] S3, Install bag 1: S31, Assemble bag body 1: Take out the first bag part 110 and the second bag part 120, align their edges, and slowly close the zipper 13 along the circumference to connect the first bag part 110 and the second bag part 120 through the zipper 13 to form a complete bag body 1.

[0056] S32, Install the isolation layer: Lay a rubber sheet 12 along the circumference of the zipper 13, and fix the rubber sheet 12 to the inner wall of the bag body 1 with the second Velcro 14. The Velcro should be pressed tightly to ensure that there is no gap between the rubber sheet 12 and the inner wall. Insert the trapezoidal end of the rubber sheet 12 into the sleeve interface 122 to form an overlapping ring structure, which effectively blocks the silt from seeping in from the seam. At the same time, ensure that the lower wing plate 1311 of the zipper head 131 is accommodated in the groove 121 of the rubber sheet 12 and slides smoothly to ensure that the zipper 13 opens and closes normally when the bag body 1 is separated later.

[0057] S33. Bag 1 in place: Place the bag 1 with the isolation layer into the circumferential constraint grid 2. During the placement process, avoid wrinkles or localized tension on the bag 1, and ensure that the outer wall of the bag 1 is tightly attached to the circumferential constraint grid 2. Fold the top of the bag 1 outward by 10-15cm and place it on the rubber strip, so that the folded part is tightly attached to the rubber strip, in preparation for the subsequent pressing of the top frame assembly.

[0058] S4, Install the three-dimensional drainage frame 7: Pre-connect one end of the dewatering strip 72 to the filter pad 71 at the designed spacing, and connect the hanging rod 73 to the other end of the dewatering strip 72, for example, by binding with a braided rope 74, to form a complete three-dimensional drainage frame 7 unit. S5, install top frame component: S51, connecting square tube 9 to hanging rod 73: Take two square tubes 9, which are parallel and symmetrical. The square tubes 9 need to be horizontally aligned and the slots 91 face inward. Adjust the position of hanging rod 73 so that the end of hanging rod 73 passes through the slot 91 of square tube 9, and connect the positioning hole 731 at the end of hanging rod 73 to the corresponding pin 10 of square tube 9 to complete the fixing. S52, hoisting: hoist the assembled whole so that the filter pad 71 enters the storage space and is connected to the inner bottom of the bag body 1 by the first Velcro; keep it in the hoisting state to ensure that the dewatering strip 72 is upright; S53, Installation of support rib 8: Install support rib 8 on the top of the protective net 3 according to the design spacing. Insert the support rib 8 into the bottom of the square tube 9 and connect it to the square tube 9. Then connect both ends of the support rib 8 to the protective net 3. The connection between the support rib 8, the square tube 9 and the protective net 3 is detachable, such as by binding with straps. After installation, release the hoisting constraints to ensure that the three-dimensional drainage frame 7 is stable and upright.

[0059] S6, sludge filling and dewatering: The sludge to be treated is pumped into the bag body 1, and the pumping pressure is controlled within a suitable range to avoid high pressure impact on the bag body 1; the water in the sludge quickly permeates to the outside of the bag body 1 and is discharged through the drainage curtain formed by the dewatering strip 72, and the solid particles in the sludge are intercepted by the bag body 1, and finally solidified soil is formed.

[0060] S7, Soil Removal and Device Recovery: After dewatering, disassemble the top frame assembly, following the order of "first the pin 10, then the square tube 9, and finally the support rib 8"; then remove the external protective net 3 and the circumferential restraint grid 2; slowly open the zipper 13 to avoid violent pulling, and then manually or with small tools lift the first bag section 110 upwards to separate the first bag section 110 from the second bag section 120, so that the solidified soil is fully exposed; after the solidified soil is removed, clean and maintain the bag body 1 and the three-dimensional drainage frame 7 for reuse.

[0061] Application results: The external constraint assembly achieves rapid enclosure through the combination of the protective net 3 and the circumferential constraint grid 2. The top frame assembly uses a square tube 9 and a pin 10 positioning structure, which can quickly adjust and fix the position of the hanging rod 73. The bag body 1 is connected by a zipper 13. The filter pad 71 and the inner bottom of the bag body 1, as well as the isolation layer and the inner wall of the bag body 1, are all detachably connected by Velcro, which solves the problem of cumbersome installation of existing devices. The modular design simplifies the disassembly and assembly process and adapts to the needs of rapid turnover on site. The bag body 1 adopts a separable structure. After dewatering, only the zipper 13 needs to be opened to fully expose the solidified soil, avoiding secondary disturbance to the soil and damage to the device when soil is taken out by traditional devices. At the same time, the main components such as the three-dimensional drainage frame 7, the bag body 1, and the external constraint assembly are all detachable. After cleaning and maintenance, they can be reused, solving the problems of easy wear and tear, difficult maintenance, and low reuse rate of traditional devices, and significantly reducing the cost of consumables and equipment investment.

[0062] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0063] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A sludge dewatering and solidification device, characterized in that, At least including: A bag (1) with an open top and capable of filtering water, wherein the bag (1) is a three-dimensional cavity structure with internal storage space; The storage space is provided with a three-dimensional drainage frame (7); wherein, the three-dimensional drainage frame (7) includes: A flexible filter pad (71) is detachably connected to the inner bottom of the bag body (1); Several spaced dewatering strips (72) serve as vertical drainage channels, with their bottom ends connected to the upper surface of the filter pad (71). Multiple spaced parallel hanging rods (73) are erected above the bag body (1), and the top of the dehydration strip (72) is connected to the hanging rods (73), so that the dehydration strip (72) is in a vertical state; the multiple dehydration strips (72) divide the storage space inside the bag body (1) into multiple independent and connected areas, forming a dense planar vertical multi-layer drainage curtain; The bag body (1) includes a first bag section (110) and a second bag section (120), which are connected by a zipper (13) to form a detachable structure; The bag body (1) is also provided with an isolation layer, which includes a flexible rubber plate (12). The rubber plate (12) is arranged around the bag body (1) and connected to the inner wall of the bag body (1) by a second Velcro (14). The flexible rubber plate (12) has a groove (121) along its length for accommodating the lower wing plate (1311) of the zipper (131). The lower wing plate (1311) of the zipper (131) can move left and right along the groove (121) to realize the opening and closing of the first bag part (110) and the second bag part (120). One end of the rubber plate (12) is a trapezoidal end, and the other end has a clip interface (122). The trapezoidal end can be inserted into the clip interface (122) so that the flexible rubber plate (12) forms a ring structure with staggered ends. It also includes an external restraint assembly, which includes a circumferential restraint grid (2) and a protective net (3). The circumferential restraint grid (2) is fitted over the outside of the bag body (1) and is tightly attached to the outer wall of the bag body (1). The protective net (3) is connected end to end to form a ring structure and is fitted over the outside of the circumferential restraint grid (2). The hanging rod (73) is detachably connected to the top of the protective net (3). The hanging rod (73) is connected to the protective net (3) through the top frame assembly. The top frame assembly includes several spaced support ribs (8). The two ends of the support ribs (8) are detachably connected to the top of the protective net (3). A symmetrical square tube (9) is provided above the support ribs (8). A through slot (91) is opened on one side of the square tube (9). The square tube (9) also has a vertical through hole (92). A pin (10) is inserted into the through hole (92). Positioning holes (731) are opened at both ends of the hanging rod (73). The end of the hanging rod (73) can pass through the slot (91) and move along the slot (91). The bottom end of the pin (10) can be fitted and inserted into the positioning hole (731). The pin (10) comprises, from top to bottom, a head (101), a pin body (102), and a tail (103) connected in sequence. The head (101) is exposed at the top of the square tube (9). A spring (11) is sleeved on the pin body (102). One end of the spring (11) is connected to the inner wall of the square tube (9), and the other end is connected to the tail (103). The tail (103) can be fitted and inserted into the positioning hole (731). It also includes a bottom support assembly for supporting the bag body (1), the bottom support assembly including a number of long strip pads (5) laid at intervals on the bearing surface, the bottom end of the protective net (3) being detachably connected to the long strip pads (5); a support mesh (4) is laid on top of the long strip pads (5), the bottom of the bag body (1) is pressed on the support mesh (4), so that the bottom of the bag body (1) forms a gap with the bearing surface.

2. The sludge dewatering and solidification device according to claim 1, characterized in that, The filter pad (71) is connected to the inner bottom of the bag body (1) by a first Velcro fastener. The first Velcro fastener includes a first hook side and a first textured side that are adapted to each other. The first hook side is fixed to the lower surface of the filter pad (71), and the first textured side is fixed to the inner bottom wall of the bag body (1).

3. The sludge dewatering and solidification device according to claim 2, characterized in that, The top of the protective net (3) is connected with a rubber strip along the circumference; the top of the bag body (1) is turned outward and fitted onto the rubber strip; the top frame assembly is pressed against the top of the bag body (1).

4. A method of using a sludge dewatering and solidification device, characterized in that, The sludge dewatering and solidification device according to claim 3 includes the following steps: S1, Bottom support component installation: The construction site is leveled, and several long strip pads (5) are laid parallel and spaced on the leveled bearing surface. Then the support mesh (4) is laid flat on top of the long strip pads (5). S2, Installation of external constraint components: Place the circumferential constraint grid (2) on the support mesh (4); lay the protective net (3) along the circumference of the circumferential constraint grid (2), connect the two ends of the protective net (3) to form a ring structure, and then connect the bottom of the protective net (3) to the long strip pad (5); fix the rubber strip along its circumference on the top of the protective net (3); S3, Install bag body (1): S31, Assemble the bag body (1): Connect the first bag part (110) and the second bag part (120) through the zipper (13) to form a complete bag body (1). S32, Install the isolation layer: Lay a rubber sheet (12) along the circumference of the zipper (13), and fix the rubber sheet (12) to the inner wall of the bag body (1) by the second Velcro (14), so that the trapezoidal end of the rubber sheet (12) is inserted into the clip interface (122) to form a ring structure with the ends overlapping, ensuring that the lower wing plate (1311) of the zipper head (131) is accommodated in the groove (121) of the rubber sheet (12) and slides smoothly; S33. Bag (1) in place: Place the bag (1) with the isolation layer into the circumferential constraint grid (2); turn the top of the bag (1) outward and place it on the rubber strip; S4, Install the three-dimensional drainage frame (7): Connect one end of the dewatering strip (72) to the filter pad (71) according to the design spacing, and connect the hanging rod (73) to the other end of the dewatering strip (72); S5, install top frame component: S51, connecting square tube (9) and hanging rod (73): Take two square tubes (9), adjust the position of the hanging rod (73) so that the end of the hanging rod (73) passes through the slot (91) of the square tube (9), and connect the positioning hole (731) at the end of the hanging rod (73) with the corresponding pin (10) of the square tube (9) to complete the fixing; S52, hoisting: hoist the assembled whole so that the filter pad (71) enters the storage space and is connected to the inner bottom of the bag body (1) by the first Velcro; keep it in the hoisting state to ensure that the dewatering strip (72) is upright; S53, Installation of support ribs (8): Install support ribs (8) on the top of the protective net (3) according to the design spacing. Insert the support ribs (8) into the bottom of the square tube (9) and connect them to the square tube (9). Then connect the two ends of the support ribs (8) to the protective net (3). After installation, release the hoisting constraints. S6, sludge filling and dewatering: The sludge to be treated is pumped into the bag body (1). The water in the sludge quickly permeates to the outside of the bag body (1) through the drainage curtain formed by the dewatering strip (72) and is discharged. The solid particles in the sludge are intercepted by the bag body (1) and finally form solidified soil. S7, Soil Removal and Device Recovery: After dehydration, remove the top frame assembly; remove the external protective net (3) and circumferential restraint grid (2); open the zipper (13), and then pull up the first bag (110) to separate the first bag (110) from the second bag (120) so that the solidified soil is fully exposed; After the solidified soil is removed, the bag body (1) and the three-dimensional drainage frame (7) are cleaned and maintained for reuse.

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