A sludge dewatering device for slag repair

Abstract

The present application provides a kind of sludge dewatering device for slag repair, it is related to sludge treatment technical field, including seepage platform assembly, rotary dewaterer main body, flocculation mixing tank and rotary filter cloth, the rotary dewaterer main body and flocculation mixing tank are all set to the above of seepage platform assembly, and the flocculation mixing tank is close to the side of rotary dewaterer main body, the flocculation mixing tank is connected with rotary dewaterer main body inside by overflow pipe, the rotary dewaterer main body inside is equipped with multiple roller assemblies, the rotary filter cloth is tensioned on multiple roller assemblies, the rotary dewaterer main body inside and located above the outside of rotary filter cloth is provided with sealed mud surrounding storehouse, the inside of sealed mud surrounding storehouse and close to the below of overflow pipe is provided with transverse component.This application realizes flocculation sludge low disturbance, even spread in limited filter cloth stroke, effectively reduces the moisture content of sludge after dewatering, and is suitable for compact dewatering process layout.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and in particular to a sludge dewatering device for slag repair. Background Technology

[0002] In existing mechanical dewatering processes for slag repair sludge or municipal sludge, gravity filter cloth dewatering machines are typically used in conjunction with a front-end flocculation reactor. The conventional connection method is as follows: the outlet of the flocculation reactor is connected via a pipe to an overflow feed box fixed above the starting end of the filter cloth belt. This overflow box has a narrow overflow port extending along the width of the equipment on its bottom or side. The sludge, after being fully reacted with the flocculant, rises under continuous feed pressure within the tank and eventually flows evenly down through the overflow port onto the surface of the uniformly moving annular gravity filter cloth belt below. There, free water naturally separates under gravity and enters the subsequent wedge press or rotary filter press zone for further dewatering.

[0003] In practical engineering applications, due to the need for compact overall equipment layout and manufacturing cost considerations, most overflow distribution boxes have their inlet ports centrally located. While this layout can achieve a certain degree of lateral spreading within the box when handling large-flow, highly fluid sludge due to the fluid's own turbulent diffusion effect, it exposes a series of irreconcilable structural contradictions when handling materials with high solids content, low fluidity, and high thixotropy, such as slag repair sludge: 1. After flocculation, the sludge exhibits non-Newtonian fluid characteristics, with a significantly increased yield stress. When the sludge is conveyed upwards to the filter cloth dewatering machine through the overflow pipe, the fluid cannot complete effective lateral momentum exchange in a short time due to the limited internal space of the box and extremely high flow resistance. This results in a large amount of sludge accumulating and pouring out in the middle of the overflow port, forming a material peak at the beginning of the filter cloth belt that is significantly higher than the sides. Because the filter cloth travels a fixed distance in the gravity dewatering section, the material enters the pressing section before it has creeped and flattened, which directly causes the middle material layer to be too thick and the capillary water to be unable to be fully discharged in the gravity section. This results in a serious "uneven load" in the subsequent pressing section, and ultimately the output moisture content remains high.

[0004] 2. The water distributor relies on the sludge flowing under gravity through the inclined grid to achieve passive cutting and downward dispersion. This process requires the filter cloth to provide a sufficiently long, straight gravity drainage stroke. When the dewatering machine is limited by plant space and the filter cloth rotation distance is severely insufficient, the water distributor is forced to "hard-spread" the high yield stress sludge within a very short distance. This urgent mechanical obstruction not only fails to evenly spread the sludge, but also forms multiple longitudinal furrows due to blockage and accumulation in front of the grid. Furthermore, a large amount of free water is physically squeezed and then re-covered by the sludge, unable to be drained in time. As a result, the moisture content of the sludge entering the pressing zone increases instead of decreasing. Given the short filter cloth distance and the failure of the static water distributor, some existing technologies have turned to using rotating crushing rollers or stirring teeth with high shear force, attempting to break up the thick material gathered in the middle and force it to the sides through strong mechanical impact in order to completely solve the problem of uneven lateral distribution. However, in practice, this only damages the flocculated clumps, causing the fine particles to fail to agglomerate.

[0005] In view of this, the present invention aims to provide an improved inlet feeding device for a gravity filter cloth dewatering machine, which achieves instantaneous, uniform, and low-disturbance spreading of flocculated sludge on the filter belt without increasing the dependence of the filter cloth rotation stroke, thereby fundamentally solving the problem of high moisture content in dewatering caused by uneven lateral feeding and floc destruction. Summary of the Invention

[0006] To address the technical problem of existing filter cloths having short travel lengths, which prevents sludge from spreading quickly at the outlet and results in high moisture content, this invention provides a sludge dewatering device for slag repair.

[0007] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a sludge dewatering device for slag repair, comprising a seepage platform assembly, a rotary dewatering machine body, a flocculation mixing tank, and a rotary filter cloth. The rotary dewatering machine body and the flocculation mixing tank are both positioned above the seepage platform assembly, with the flocculation mixing tank located closer to the rotary dewatering machine body. The flocculation mixing tank is connected to the interior of the rotary dewatering machine body via an overflow pipe. The rotary dewatering machine body contains multiple rotating roller assemblies, and the rotary filter cloth is tensioned on these roller assemblies. A sealed sludge containment chamber is located inside the rotary dewatering machine body and above the outside of the rotary filter cloth. A transverse section assembly is located inside the sealed sludge containment chamber and below the overflow pipe. A bidirectional flattening guide assembly is located inside the sealed sludge containment chamber and below the transverse section assembly.

[0008] Preferably, the seepage platform assembly includes a seepage tank, and the bottom of the rotary dewatering machine body is supported above the seepage tank by four support columns. The bottom of the seepage tank is divided into four triangular downward slopes. A rectangular tube is connected inside the seepage tank and at the intersection of the four triangular downward slopes. One end of the rectangular tube extends outward to one end of the seepage tank. The flocculation mixing tank is located above the seepage tank and close to one side of the rotary dewatering machine body.

[0009] Preferably, the transverse assembly includes a filter plate, which is fixedly installed inside the sealed sludge chamber and below the overflow pipe. A transverse baffle is provided at the upper end of the filter plate, and an outlet is provided in the middle of the transverse baffle. Diverter plates are provided on both sides of the filter plate near the outlet. One side of the filter plate is inclined downward and located above the rotary filter cloth. The rotary filter cloth is arranged from bottom to top.

[0010] Preferably, the bidirectional flattening guide assembly includes a drive assembly and a rotating shaft. The drive assembly is located on one side of the rotary dewatering machine body, and its output end is connected to the rotating shaft through a transmission assembly. Guide rollers are fixedly sleeved on the outer side of the rotating shaft and near the corresponding diverter plate. Spiral grooves are opened on the outer surface of the two guide rollers, and the spiral grooves on the two guide rollers have opposite directions of rotation. Blind zone anti-piling assemblies are provided at both ends of the rotating shaft.

[0011] Preferably, the blind zone anti-stacking component includes an annular shell, which is fixedly fitted onto one end of a rotating shaft. A conical expansion hood is provided on one side of the annular shell. Elastic expansion components are provided at both the top and bottom inside the conical expansion hood. The conical expansion hood is made of elastic tensile material, with the flared end facing the diversion plate and the narrow end facing the wall of the sealed sludge chamber. A filter cake component is provided at the front end inside the conical expansion hood. A side baffle is provided on the inner wall of the sealed sludge chamber near the conical expansion hood, and the bottom of the side baffle is connected to the upper surface of the filter plate.

[0012] Preferably, the elastic expansion assembly includes a mounting block located inside one side of the conical expansion hood. A guide post is rotatably arranged inside the mounting block, and a spring is provided on one side of the guide post. The other end of the spring is connected to the filter cake assembly.

[0013] Preferably, the filter cake assembly includes a circular shell, which is fitted outside the rotating shaft and located inside the conical expansion hood. Tensioning columns are provided at both the upper and lower ends of the circular shell. An elastic filter membrane is fitted on the outer side of the two tensioning columns. The outer edge of the elastic filter membrane is connected to the inner wall of the conical expansion hood. The end of the spring away from the guide column is connected to the tensioning column. Silicone scrapers are provided at equal intervals along the circumferential direction on the outer edge of the conical expansion hood.

[0014] Preferably, the drive assembly includes a base and a servo motor. The base is fixedly mounted on one side of the rotary dewatering machine body, the servo motor is mounted on one side of the base, the output end of the servo motor is connected to a drive shaft, and an L-shaped frame is fixedly mounted on the upper surface of the base, with the L-shaped frame and the drive shaft rotating together.

[0015] Preferably, the transmission assembly includes a pulley assembly, and the drive shaft and the rotating shaft are connected via the pulley assembly.

[0016] Preferably, the rotary dewatering machine body has a water collection chamber inside for receiving wastewater from the gravity settling of the rotary filter cloth. Multiple anti-clogging components are located inside the rotary dewatering machine body and below one side of the water collection chamber. The rotary filter cloth passes through the interior of these anti-clogging components in the direction of backflow. These anti-clogging components are used to scrape sludge from the outer surface of the rotary filter cloth. Hydraulic tensioning components are located diagonally below both sides of the rotary dewatering machine body, near the overflow pipe. Two of these hydraulic tensioning components are used to tension the rotary filter cloth. Water distributors are arranged at equal intervals along the horizontal direction inside the rotary dewatering machine body. A discharge plate is located at the end of the rotary dewatering machine body away from the flocculation mixing tank. A wedge-type filter press box is located above the end of the rotary dewatering machine body near the discharge plate.

[0017] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: This invention effectively solves the problem of uneven sludge distribution during short filter cloth strokes by using a cross-section component and a bidirectional spreading guide component in coordinated operation. The cross-section baffle intercepts the concentrated falling sludge and initially thins it, while the outlet promptly discharges free water, reducing the burden on subsequent dewatering. The diverter plate further diverts the sludge laterally to the sides at the overflow pipe outlet, preventing the accumulation of material peaks in the middle. Subsequently, the guide rollers with spiral grooves actively push the sludge to both sides during rotation. (When the sludge accumulates and becomes thick, the guide rollers contact the sludge; when the sludge is in a thin layer, the guide rollers do not contact the sludge.) This achieves rapid and uniform lateral distribution without relying on long gravity dewatering strokes, significantly saving equipment space and effectively reducing the moisture content of the final discharge.

[0018] Meanwhile, the blind zone anti-stacking components at both ends of the rotating shaft utilize a conical expansion hood and an elastic support structure to prevent sludge from accumulating and hardening when it is guided into the blind zone of the sealed sludge chamber's side wall. The silicone scraper cleans the chamber wall in real time, reducing manual downtime for maintenance. Furthermore, the elastic filter membrane and springs work in an adaptive manner; when sludge approaches the chamber wall, it contacts the elastic filter membrane, causing the conical expansion hood to open and the silicone scraper to expand outwards, contacting the accumulated sludge and clearing the blind zone of the chamber wall. Through these processes and structures, the uniformity and filterability of the sludge before entering the pressing section are further improved, ensuring the long-term stable and efficient dewatering performance of the entire machine. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a sludge dewatering device for slag repair provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the sludge dewatering device for slag repair provided in an embodiment of the present invention from another perspective.

[0022] Figure 3 This is a side-section view of the internal structure of a rotary dewatering machine body that can stand upright without its main body assembled, as provided in an embodiment of the present invention.

[0023] Figure 4 This is a side view of a sludge dewatering device for slag repair provided in an embodiment of the present invention.

[0024] Figure 5 This is a partial structural diagram of a sludge dewatering device for slag repair provided in an embodiment of the present invention, in which the transverse component and the bidirectional flat-spreading guide component are installed inside a sealed sludge silo.

[0025] Figure 6 This is an exploded view of the conical expansion section of a sludge dewatering device for slag repair provided in an embodiment of the present invention.

[0026] Figure 7 A sludge dewatering device for slag repair provided in an embodiment of the present invention. Figure 3 Enlarged view of the structure at point A in the middle.

[0027] Reference numerals: 1. Percolation tank; 2. Rotary dewatering machine body; 3. Anti-clogging component; 4. Feed plate; 5. Wedge filter press box; 6. Flocculation mixing tank; 7. Overflow pipe; 8. Cross section baffle; 9. Outlet; 10. Rotary filter cloth; 11. Water distributor; 12. Hydraulic tensioning component; 13. Machine base; 14. Sinking slope; 15. Sealed mud chamber; 16. Spring; 17. Filter plate; 18. L-shaped frame; 19. Servo motor; 20. Water collection chamber; 21. Drive shaft; 22. Tensioning column; 23. Elastic filter membrane; 24. Rotating shaft; 25. Silicone scraper; 26. Side baffle; 27. Guide roller; 28. Pulley assembly; 29. ​​Spiral groove; 30. Conical expansion cover; 31. Mounting block; 32. Diverter plate.

[0028] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0029] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0030] like Figures 1 to 7 As shown, an embodiment of the present invention provides a sludge dewatering device for slag repair, including a seepage platform assembly, a rotary dewatering machine body 2, a flocculation mixing tank 6, and a rotary filter cloth 10. The rotary dewatering machine body 2 and the flocculation mixing tank 6 are both positioned above the seepage platform assembly, with the flocculation mixing tank 6 closer to the side of the rotary dewatering machine body 2. The flocculation mixing tank 6 is connected to the interior of the rotary dewatering machine body 2 via an overflow pipe 7. The rotary dewatering machine body 2 contains multiple rotating roller assemblies, and the rotary filter cloth 10 is tensioned on these roller assemblies, forming a closed loop. The rotary dewatering machine moves at a constant speed under the drive of multiple rotating roller assemblies. A sealed sludge chamber 15 is set inside the main body 2 of the rotary dewatering machine and above the outside of the rotary filter cloth 10. The sealed sludge chamber 15 is used to limit the sludge within the effective working width of the filter cloth and prevent the sludge from overflowing. A transverse component is set inside the sealed sludge chamber 15 and below the overflow pipe 7 to initially intercept and spread the concentrated falling sludge. A bidirectional spreading guide component is set inside the sealed sludge chamber 15 and below the transverse component to further push the initially spread sludge evenly to both sides of the filter cloth width direction.

[0031] In this embodiment, the seepage platform assembly provides support and filtrate collection for the entire dewatering device. The sealed sludge chamber 15 is fixedly installed on the internal frame of the rotary dewatering machine body 2, with its bottom opening facing the upper surface of the rotary filter cloth 10, and its side walls maintaining a sealed fit with the edges of the rotary filter cloth 10. The transverse assembly is fixedly installed on the inner wall of the sealed sludge chamber 15, located directly below the outlet of the overflow pipe 7. The bidirectional flattening guide assembly is installed inside the sealed sludge chamber 15 and located below the transverse assembly, and is driven by the drive assembly.

[0032] like Figure 1 and Figure 2As shown, in one possible embodiment, the seepage platform assembly includes a seepage tank 1. The bottom of the rotary dewatering machine body 2 is supported above the seepage tank 1 by four support columns, so that the wastewater separated by gravity sedimentation during the dewatering process can fall directly into the seepage tank 1 and collect. The bottom of the seepage tank 1 is divided into four triangular sinking slopes 14, which are formed by gradually sinking from the bottom of the seepage tank 1 towards the center. The inclination angle is preferably 5°~15° to ensure that the wastewater can flow smoothly under the action of gravity without sludge accumulation. A rectangular tube is connected inside the seepage tank 1 and at the intersection of the four triangular sinking slopes 14. One end of the rectangular tube extends out to one end of the seepage tank 1. The flocculation mixing tank 6 is set above the seepage tank 1 and close to the side of the rotary dewatering machine body 2.

[0033] like Figure 3 and Figure 5 As shown, in one possible embodiment, the transverse assembly includes a filter plate 17, which is fixedly disposed inside the sealed sludge chamber 15 and below the overflow pipe 7. A transverse baffle 8 is laterally disposed at the upper end of the filter plate 17. The transverse baffle 8 extends horizontally along the width direction of the sealed sludge chamber 15 and is used to intercept the sludge falling from the overflow pipe 7 laterally and force it to spread to both sides. An outlet 9 is provided in the middle of the transverse baffle 8. The filter plate 17 is provided with a water outlet 9 on both sides near the water outlet 9. A diversion plate 32 is provided to further guide the sludge flow, which has been initially thinned by the transverse baffle 8, to both sides of the rotary filter cloth 10. One side of the filter plate 17 is inclined downwards, so that the sludge after diversion can smoothly slide down the inclined surface of the filter plate 17 onto the rotary filter cloth 10 under the action of gravity, and is located above the rotary filter cloth 10. The rotary filter cloth 10 is arranged from bottom to top, that is, the direction of travel of the rotary filter cloth 10 in the transverse assembly is from bottom to top.

[0034] The diversion plate 32 is arranged in a herringbone shape, with its pointed end facing the material inflow direction, i.e., towards the outlet 9. Its two arms extend obliquely towards both sides of the filter plate 17. When the sludge, initially thinned by the transverse baffle 8, slides down, it first contacts the pointed end of the herringbone diversion plate 32. Under the diversion effect of the pointed end, the sludge is obliquely guided along the two arms to the areas on both sides of the filter plate 17, effectively dispersing the sludge flow originally concentrated in the middle to both ends in the width direction of the filter cloth. Simultaneously, the herringbone structure can achieve passive diversion using the gravity of the sludge itself without adding additional power, reducing the accumulation height of the material peak in the middle and allowing the sludge to form a more uniform lateral distribution before entering the bidirectional spreading and guiding component.

[0035] like Figure 3 , Figure 5 and Figure 6As shown, in one possible embodiment, the bidirectional spreading guide assembly includes a drive assembly and a rotating shaft 24. The drive assembly is located on one side of the rotary dewatering machine body 2, and its output end is connected to the rotating shaft 24 through a transmission assembly. Guide rollers 27 are fixedly sleeved on the outer side of the rotating shaft 24 and near the corresponding diverter plate 32. The outer surfaces of the two guide rollers 27 are provided with spiral grooves 29. The spiral grooves 29 on the two guide rollers 27 rotate in opposite directions, so that during the rotation of the rotating shaft 24, the two guide rollers 27 generate axial pushing forces on the sludge in opposite directions, pushing the sludge from the middle to both sides for spreading. Blind zone anti-stacking components are provided at both ends of the rotating shaft 24 to prevent sludge from accumulating and hardening in the spreading blind zone near the bin wall at both ends of the sealed sludge bin 15.

[0036] Furthermore, the drive assembly is fixedly installed on one side of the frame of the rotary dewatering machine body 2. The rotating shaft 24 is horizontally positioned inside the sealed mud chamber 15, with its axis parallel to the width direction of the sealed mud chamber 15. The guide rollers 27 are fixedly mounted on the rotating shaft 24 via key connections or set screws. The inner end faces of the two guide rollers 27 are arranged opposite each other, with a gap between them corresponding to the outlet 9. The spiral groove 29 is a continuous spiral groove formed on the outer surface of the guide rollers 27, and its spiral direction is determined according to the pushing direction.

[0037] like Figure 5 , Figure 6 and Figure 7 As shown, in one possible embodiment, the blind zone anti-stacking component includes an annular shell, which is fixedly fitted onto one end of a rotating shaft 24. A conical expansion hood 30 is provided on one side of the annular shell. The conical expansion hood 30 rotates synchronously with the rotating shaft 24 via the annular shell. Elastic expansion components are provided at both the top and bottom inside the conical expansion hood 30, which are used to adaptively expand outward when squeezed by sludge. The conical expansion hood 30 is made of elastic tensile material, which has deformability and elastic recovery capability. The flared end faces the diversion plate 32, and the narrow end faces the wall of the sealed sludge chamber 15. A filter cake assembly is provided at the front end inside the conical expansion hood 30. A side baffle 26 is provided on the inner wall of the sealed sludge chamber 15 and on the side close to the conical expansion hood 30. The bottom of the side baffle 26 is connected to the upper surface of the filter plate 17. The side baffle 26 is used to prevent sludge from leaking from the edges on both sides of the filter plate 17 and to guide the sludge smoothly into the effective range of the conical expansion hood 30.

[0038] Furthermore, the annular shell is a metal ring sleeve, with its inner hole fixed to the rotating shaft 24. The small-diameter end of the conical expansion hood 30 is fixedly connected to one side end face of the annular shell, while the large-diameter end is a free end facing the interior of the sealed sludge chamber 15. The elastic expansion assembly is installed inside the conical expansion hood 30, with its two ends connected to the inner walls of the annular shell and the conical expansion hood 30, respectively. The filter cake assembly is fitted outside the rotating shaft 24 and located at the front end of the conical expansion hood 30, used to prevent sludge from entering the interior of the conical expansion hood 30, thereby affecting the use of the elastic expansion assembly. The side baffles 26 are fixedly installed on both sides of the inner wall of the filter plate 17, extending downwards to a position close to the conical expansion hood 30.

[0039] It should be noted that the conical expansion shroud 30 is preferably made of silicone or polyurethane elastomer material to ensure good guiding effect and elastic deformation capability. A sealing ring can be provided between the annular shell and the rotating shaft 24 to prevent sludge from seeping into the shaft hole. An appropriate gap should be maintained between the side baffle 26 and the outer wall of the conical expansion shroud 30 to ensure the guiding effect while avoiding motion interference.

[0040] like Figure 5 and Figure 7 As shown, in one possible embodiment, the elastic expansion assembly includes a mounting block 31 located inside the conical expansion hood 30. A guide post is rotatably mounted inside the mounting block 31, and the guide post can swing within a certain angle range around its own axis within the mounting block 31. A spring 16 is mounted on one side of the guide post, and the other end of the spring 16 is connected to the filter cake assembly. When the filter cake assembly at the front end of the conical expansion hood 30 is squeezed by sludge, the spring 16 is compressed or stretched, and the guide post rotates relative to the mounting block 31, thereby causing the conical expansion hood 30 to adaptively expand outward, increasing its contact area with the accumulated sludge. When the external force disappears, the spring 16 returns to its original deformation, and the conical expansion hood 30 returns to its initial state under the action of elasticity.

[0041] It should be noted that the rotation angle range of the guide column should be sufficient to meet the maximum expansion requirements of the conical shroud 30.

[0042] like Figure 5 , Figure 6 and Figure 7 As shown, in one possible embodiment, the filter cake assembly includes a circular shell, which is fitted outside the rotating shaft 24 and inside the conical expansion hood 30. Tensioning columns 22 are provided at both the upper and lower ends of the circular shell. An elastic filter membrane 23 is fitted on the outer side of the two tensioning columns 22. The elastic filter membrane 23 is arc-shaped and concave, and can deform when in contact with sludge. The outer edge of the elastic filter membrane 23 is connected to the inner wall of the conical expansion hood 30. The end of the spring 16 away from the guide column is connected to the tensioning column 22. Silicone scraper strips 25 are provided at equal intervals along the circumferential direction on the outer edge of the conical expansion hood 30.

[0043] Furthermore, the silicone scraper 25 is evenly distributed circumferentially along the outer edge of the conical expansion cover 30. Its material is wear-resistant silicone. The silicone scraper 25 can extend along with the conical expansion cover 30, thereby disturbing the sludge accumulated in the corner area of ​​the bin wall.

[0044] like Figure 3 and Figure 4 As shown, in one possible embodiment, the drive assembly includes a base 13 and a servo motor 19. The base 13 is fixedly mounted on one side of the rotary dewatering machine body 2, and the servo motor 19 is mounted on one side of the base 13. The servo motor 19 can be stably mounted on one side of the rotary dewatering machine body 2 via the base 13. The output end of the servo motor 19 is connected to a drive shaft 21. An L-shaped frame 18 is fixedly mounted on the upper surface of the base 13. The L-shaped frame 18 and the drive shaft 21 are rotatably coupled. The L-shaped frame 18 serves as an auxiliary support structure for the drive shaft 21, which can effectively reduce the radial runout and vibration of the drive shaft 21 during rotation, thereby improving transmission accuracy and operational stability.

[0045] Furthermore, the base 13 is a rigid base made of welded steel plate or cast iron, which is fixedly installed on one side of the frame of the rotary dewatering machine body 2 by bolts.

[0046] The servo motor 19 is fixedly mounted on the side of the base 13 by bolts, and its output shaft is connected to the drive shaft 21 by a coupling.

[0047] The vertical section of the L-shaped frame 18 is fixedly installed on the upper end face of the base 13, and its horizontal section extends to the top or bottom of the drive shaft 21. A bearing seat is provided at the end of the horizontal section, and the drive shaft 21 passes through the bearing seat and rotates with the L-shaped frame 18 through the bearing.

[0048] It should be noted that the control system of the servo motor 19 uses a PLC controller for variable frequency speed control. The PLC controller is connected to the driver of the servo motor 19 through a communication bus, and can automatically adjust the speed of the servo motor 19 according to the feedback signal of the feed flow sensor.

[0049] like Figure 4 As shown, in one possible embodiment, the transmission assembly includes a pulley assembly 28, and the drive shaft 21 and the rotating shaft 24 are connected via the pulley assembly 28.

[0050] Furthermore, the pulley assembly 28 includes a drive pulley fixedly mounted on the drive shaft 21, a driven pulley fixedly mounted on the rotating shaft 24, and a transmission belt tensioned between the two. The power output from the servo motor 19 is transmitted to the rotating shaft 24 via the drive shaft 21, the drive pulley, the transmission belt, and the driven pulley, driving the rotating shaft 24 and the guide roller 27 and the blind spot anti-stacking assembly mounted thereon to rotate synchronously. like Figure 1 , Figure 2 and Figure 3 As shown, in one possible embodiment, the rotary dewatering machine body 2 is provided with a water collection chamber 20 inside to receive wastewater from the gravity settling of the rotary filter cloth 10. Multiple anti-clogging components 3 are arranged inside the rotary dewatering machine body 2 and below one side of the water collection chamber 20. The rotary filter cloth 10 passes through the interior of the multiple anti-clogging components 3 in the direction of return flow. The multiple anti-clogging components 3 are arranged at intervals along the return path of the filter cloth. The multiple anti-clogging components 3 are used to scrape the sludge from the outer surface of the rotary filter cloth 10. Hydraulic tensioning components 12 are arranged diagonally below both sides of the rotary dewatering machine body 2, near the overflow pipe 7. Two hydraulic tensioning components 12 are used to tension the rotary filter cloth 10, applying tension force to the rotary filter cloth 10 to ensure the rotation of the rotary filter cloth 10. During operation, the filter cloth maintains appropriate tension to prevent it from loosening and deviating. Inside the main body 2 of the rotary dewatering machine, water distributors 11 are arranged at equal intervals along the horizontal direction. The water distributors 11 are used to spray water or rinsing liquid onto the sludge layer on the rotary filter cloth 10 to adjust the moisture content and uniformity of the sludge distribution. At the end of the main body 2 of the rotary dewatering machine away from the flocculation mixing tank 6, there is a feeding plate 4. The feeding plate 4 is inclined at the end of the filter cloth and is used to scrape the dewatered sludge cake off the rotary filter cloth 10 and guide it out. Above the end of the main body 2 of the rotary dewatering machine and close to the feeding plate 4, there is a wedge filter press box 5. The wedge filter press box 5 has a wedge-shaped pressing space inside, which is used to press and dewater the sludge after gravity dewatering to further reduce the moisture content of the sludge.

[0051] The water collection tank 20 is a long strip-shaped water tank extending along the length of the rotary dewatering machine body 2. A drain outlet is provided at the bottom of the tank, and the drain outlet is connected to the seepage tank 1 or the external sewage network through a pipe.

[0052] Furthermore, the anti-clogging component 3 includes a scraper or brush roller, which is fixedly installed on the frame of the rotary dewatering machine body 2. The cutting edge of the scraper contacts the return surface of the rotary filter cloth 10 to scrape off the residual sludge adhering to the surface of the filter cloth.

[0053] The hydraulic tensioning assembly 12 includes a hydraulic cylinder and a tensioning roller. One end of the hydraulic cylinder is hinged to the frame of the rotary dewatering machine body 2, and the other end is connected to the bearing seat of the tensioning roller. The position of the tensioning roller is adjusted by controlling the extension and retraction of the hydraulic cylinder through the hydraulic system, thereby adjusting the tension of the rotary filter cloth 10.

[0054] The water distributor 11 includes a spray pipe arranged along the width of the rotary dewatering machine body 2. Spray holes are evenly spaced on the spray pipe, and the spray pipe is connected to an external water source through a pipe.

[0055] The wedge filter press 5 has a pair of wedge-shaped pressing plates arranged vertically opposite each other inside, which apply progressively increasing pressing force to the sludge layer that passes through.

[0056] It should be noted that the hydraulic system of the hydraulic tensioning assembly 12 is uniformly controlled by a PLC controller. The hydraulic system includes a hydraulic pump station, a solenoid directional valve, a relief valve, and a pressure sensor. The PLC controller adjusts the output pressure of the hydraulic system in real time based on the feedback signal from the pressure sensor to maintain a constant tension of the rotary filter cloth 10. The scraper of the anti-clogging assembly 3 is preferably made of polyurethane or rubber to avoid damaging the filter cloth. The spray volume and spray time of the water distributor 11 can be automatically controlled by solenoid valves and the PLC controller.

[0057] The working principle of the technical solution provided in this embodiment of the invention is as follows: In this invention, the sludge that has completed the flocculation reaction in the flocculation mixing tank 6 enters the sealed sludge silo 15 through the overflow pipe 7 under continuous feeding pressure. The sludge first falls to the transverse component, where the transverse baffle 8 intercepts and initially spreads the concentrated falling sludge laterally. Some of the free water carried in the sludge is discharged into the sealed sludge silo 15 through the outlet 9 in the middle of the transverse baffle 8. After being initially spread, the sludge slides down along both sides of the filter plate 17 and is further laterally diverted to both sides of the filter cloth width direction under the guidance of the diversion plate 32. This ensures that the sludge has a preliminary lateral distribution foundation before entering the bidirectional spreading and guiding component, effectively avoiding excessive accumulation of the central material peak.

[0058] Subsequently, the drive assembly drives the rotating shaft 24 to rotate via the transmission assembly. The guide roller 27, which is fixedly sleeved on the outside of the rotating shaft 24 and corresponds to the position of the diversion plate 32, rotates synchronously. The spiral grooves 29 on the outer surface of the guide roller 27 generate an axial pushing force on the sludge during rotation, continuously pushing and spreading the sludge to both sides, thus achieving active, rapid, and uniform spreading of the sludge in the width direction of the rotary filter cloth 10. When the sludge accumulation is thick, the guide roller 27 contacts the sludge and applies a pushing action. When the sludge is in a thin layer, the guide roller 27 does not contact the sludge to avoid excessive disturbance to the already spread sludge layer.

[0059] During the process of pushing the sludge to both sides, the blind zone anti-stacking components set at both ends of the rotating shaft 24 work synchronously. When the sludge is pushed to the spreading blind zone near the side wall of the sealed sludge silo 15, the sludge comes into contact with the elastic filter membrane 23 inside the conical expansion hood 30. Under the pressure of sludge accumulation, the spring 16 is compressed, the guide column rotates relative to the mounting block 31, and the elastic expansion component expands the conical expansion hood 30 outward, so that the silicone scraper 25 expands outward adaptively and comes into contact with the sludge accumulated in the blind zone of the silo wall, effectively discharging the sludge in the blind zone and preventing the sludge from accumulating and hardening in the corners of the silo.

[0060] After being evenly spread and initially dewatered, the sludge continues to move forward with the rotary filter cloth 10, passing through the water distributor 11 for rinsing and distribution adjustment, and then enters the wedge filter press 5 for pressing and dewatering. Finally, it is discharged from the discharge plate 4, completing the dewatering process. Throughout the dewatering process, the rotary filter cloth 10 maintains appropriate tension under the action of the hydraulic tensioning component 12 to ensure stable operation. During the return stroke, the filter cloth passes through multiple anti-clogging components 3, which scrape off residual sludge adhering to the outer surface of the filter cloth to prevent clogging. The wastewater separated by gravity sedimentation flows into the collection tank 20 and is discharged through a pipe. The wastewater that seeps into the infiltration tank 1 is collected by four triangular sinking ramps 14 and converges into a rectangular pipe at the confluence, from which it is discharged.

[0061] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0062] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sludge dewatering device for slag repair, comprising a seepage platform assembly, a rotary dewatering machine body, a flocculation mixing tank, and a rotary filter cloth, characterized in that, The rotary dewatering machine body and the flocculation mixing tank are both located above the seepage platform assembly, with the flocculation mixing tank on the side closer to the rotary dewatering machine body. The flocculation mixing tank is connected to the interior of the rotary dewatering machine body via an overflow pipe. The rotary dewatering machine body has multiple rotating roller assemblies inside, and the rotary filter cloth is tensioned on the multiple rotating roller assemblies. A sealed mud-enclosing chamber is located inside the rotary dewatering machine body and above the outside of the rotary filter cloth. A transverse section assembly is located inside the sealed mud-enclosing chamber and below the overflow pipe. A bidirectional flat-laying guide assembly is located inside the sealed mud-enclosing chamber and below the transverse section assembly.

2. The sludge dewatering device for slag repair according to claim 1, characterized in that, The seepage platform assembly includes a seepage tank. The main body of the rotary dewatering machine is supported above the seepage tank by four support columns. The bottom of the seepage tank is divided into four triangular downward slopes. A rectangular tube is connected inside the seepage tank and at the intersection of the four triangular downward slopes. One end of the rectangular tube extends outward to one end of the seepage tank. The flocculation mixing tank is located above the seepage tank and close to one side of the main body of the rotary dewatering machine.

3. The sludge dewatering device for slag repair according to claim 1, characterized in that, The transverse assembly includes a filter plate, which is fixedly installed inside the sealed mud chamber and below the overflow pipe. A transverse baffle is provided at the upper end of the filter plate, and an outlet is provided in the middle of the transverse baffle. Diverter plates are provided on both sides of the filter plate near the outlet. One side of the filter plate is inclined downward and located above the rotary filter cloth. The rotary filter cloth is arranged from bottom to top.

4. The sludge dewatering device for slag repair according to claim 3, characterized in that, The bidirectional flattening guide assembly includes a drive assembly and a rotating shaft. The drive assembly is located on one side of the main body of the rotary dewatering machine, and its output end is connected to the rotating shaft through a transmission assembly. Guide rollers are fixedly sleeved on the outer side of the rotating shaft and near the corresponding diverter plate. Spiral grooves are opened on the outer surface of the two guide rollers, and the spiral grooves on the two guide rollers have opposite directions of rotation. Blind zone anti-piling components are provided at both ends of the rotating shaft.

5. A sludge dewatering device for slag repair according to claim 4, characterized in that, The blind zone anti-stacking component includes an annular shell, which is fixedly fitted onto one end of a rotating shaft. A conical expansion hood is provided on one side of the annular shell. Elastic expansion components are provided at both the top and bottom inside the conical expansion hood. The conical expansion hood is made of elastic tensile material, with the flared end facing the diversion plate and the narrow end facing the wall of the sealed sludge chamber. A filter cake assembly is provided at the front end inside the conical expansion hood. A side baffle is provided on the inner wall of the sealed sludge chamber near the conical expansion hood, and the bottom of the side baffle is connected to the upper surface of the filter plate.

6. A sludge dewatering device for slag repair according to claim 5, characterized in that, The elastic expansion assembly includes a mounting block located inside one side of the conical expansion hood. A guide post is rotatably arranged inside the mounting block, and a spring is provided on one side of the guide post. The other end of the spring is connected to the filter cake assembly.

7. A sludge dewatering device for slag repair according to claim 6, characterized in that, The filter assembly includes a circular shell, which is fitted outside the rotating shaft and inside the conical expansion hood. Tensioning columns are provided at both the upper and lower ends of the circular shell. An elastic filter membrane is fitted on the outer side of the two tensioning columns. The outer edge of the elastic filter membrane is connected to the inner wall of the conical expansion hood. The end of the spring away from the guide column is connected to the tensioning column. Silicone scrapers are provided at equal intervals along the circumferential direction on the outer edge of the conical expansion hood.

8. A sludge dewatering device for slag repair according to claim 4, characterized in that, The drive assembly includes a base and a servo motor. The base is fixedly mounted on one side of the rotary dewatering machine body, and the servo motor is mounted on one side of the base. The output end of the servo motor is connected to a drive shaft. An L-shaped frame is fixedly mounted on the upper surface of the base, and the L-shaped frame is rotatably engaged with the drive shaft.

9. A sludge dewatering device for slag repair according to claim 8, characterized in that, The transmission assembly includes a pulley assembly, and the drive shaft and the rotating shaft are connected by the pulley assembly.

10. A sludge dewatering device for slag repair according to claim 1, characterized in that, The rotary dewatering machine has a water collection chamber inside its main body to collect wastewater from the gravity settling of the rotary filter cloth. Multiple anti-clogging components are located inside the main body of the rotary dewatering machine and below one side of the water collection chamber. The rotary filter cloth passes through the interior of these anti-clogging components in the direction of backflow. These anti-clogging components are used to scrape sludge from the outer surface of the rotary filter cloth. Hydraulic tensioning components are located diagonally below the sides of the rotary dewatering machine, near the overflow pipe. Two of these hydraulic tensioning components are used to tension the rotary filter cloth. Water distributors are evenly spaced horizontally inside the main body of the rotary dewatering machine. A discharge plate is located at the end of the rotary dewatering machine away from the flocculation mixing tank. A wedge-type filter press box is located above the end of the rotary dewatering machine near the discharge plate.

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