A device and method for dewatering, drying, and resource-based molding of papermaking sludge.

Abstract

This invention discloses a papermaking sludge dewatering, drying, and resource-based molding device and method, relating to the field of papermaking sludge treatment technology. It includes an installation box and a dewatering component. The installation box has an injection component on its right side, an extrusion component on its upper side, a flow guiding component on its lower side, a support component inside the flow guiding component, a feeding component at its lower end, a drying component at its right end, and a cutting component on the upper right side of the surface of the feeding component. This device integrates dewatering, molding, cutting, and drying processes into a single unit, achieving automated continuous production. Through centrifugal and extrusion combined dewatering, spiral conveying molding, and closed-loop temperature-controlled drying, it effectively improves dewatering efficiency, reduces energy consumption, and produces molded products with stable properties that are easy to utilize for resource recovery.

Description

Technical Field

[0001] This invention relates to the field of papermaking sludge treatment technology, specifically to a papermaking sludge dewatering, drying, and resource-based molding device and molding method. Background Technology

[0002] Although the moisture content of paper mill sludge decreases to some extent after mechanical dewatering, the resulting sludge filter cake still retains high humidity and stickiness, and its physical form is loose and unstable. This state of sludge not only results in a large volume, leading to high costs and difficulties in subsequent transportation and storage, but also makes direct resource utilization challenging. Whether used as a derivative fuel, building material additive, or for other forms of comprehensive utilization, further advanced processing of the dewatered sludge is essential. Therefore, the drying process is crucial. Its purpose is to significantly reduce the moisture content of the sludge, drastically reduce its volume and weight, eliminate its stickiness, and improve its calorific value or physical stability, thereby transforming it into a stable, easily stored and transportable intermediate product or a final resource-based product. This is an indispensable and crucial step in realizing the transformation of sludge from waste to resource.

[0003] However, existing sludge treatment technologies often have many shortcomings in this stage. Common process flows typically separate dewatering, drying, and molding processes, resulting in dispersed equipment layouts and requiring multiple material transfers between different devices. This discontinuous operation not only leads to large production line footprints and low automation, but also easily causes secondary pollution problems such as sludge spillage and leakage during transfer, worsening the workshop environment. More importantly, the split design results in significant system heat loss and high overall energy consumption. Regarding drying methods, some existing technologies rely on traditional hot air direct drying, which has low energy efficiency and high operating costs; while some more energy-efficient drying technologies have not been effectively integrated with the molding process, resulting in sludge particles with low strength and poor uniformity after treatment, affecting their resource utilization value. In addition, existing devices are usually weak in the coordinated control and integration of dewatering, molding, and drying processes, making it difficult to achieve stable, efficient, and low-cost continuous integrated production. Therefore, we propose a papermaking sludge dewatering, drying, and resource-based molding device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a papermaking sludge dewatering, drying and resource-based molding device and molding method, which can integrate dewatering, molding, cutting and drying processes into an integrated device to realize automated continuous production. Through centrifugal and extrusion combined dewatering, spiral conveying molding and closed-loop temperature-controlled drying, it can effectively improve dewatering efficiency, reduce energy consumption and produce molded products with stable properties that are easy to be utilized by resources, which can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a papermaking sludge dewatering, drying, and resource-based molding device, comprising an installation box and a dewatering component;

[0006] Installation box: A feeding assembly is installed on the right side, an extrusion assembly is installed on the upper side inside the installation box, a flow guiding assembly is installed on the lower side of the installation box, a support assembly is installed inside the flow guiding assembly, a feeding assembly is installed at the lower end of the flow guiding assembly, a drying assembly is installed at the right end of the feeding assembly, a cutting assembly is installed on the right side of the upper surface of the feeding assembly, and a drain pipe is fixed inside the drain outlet on the left side of the installation box. A solenoid valve is installed on the circumference of the drain pipe. The input end of the solenoid valve is electrically connected to the output end of an external PLC controller. Through the drain pipe on the side of the installation box, the wastewater separated from the sludge during the dewatering process can be discharged in a concentrated manner. The opening and closing of the drain pipe is automatically controlled by the solenoid valve, and wastewater can be discharged on a timed basis or according to conditions as needed, realizing the programmed and automated management of the dewatering process.

[0007] The dewatering assembly comprises a first motor, gears, a mesh tube, a gear ring, and a protective shell. The first motor is mounted on the lower side of the mounting box, and a gear is fixed to the output shaft of the first motor. A rotating hole is provided on the lower side of the mounting box, and a mesh tube is rotatably connected inside the rotating hole. A gear ring is fixed to the lower end of the mesh tube surface, and the gear ring meshes with the gear. A protective shell is fixed to the lower side inside the mounting box, and an opening is provided on the upper side of the protective shell. The mesh tube is located inside the opening. Both the gear ring and the gear are located inside the protective shell. The input end of the first motor is electrically connected to the output end of an external PLC controller. The dewatering assembly drives the gear and gear ring to mesh, causing the mesh tube to rotate. Centrifugal force is used to dewater the sludge. The protective shell protects the transmission components and prevents water splashing.

[0008] Furthermore, the support assembly includes a locking block, a chuck, a connecting block, a connecting frame, a second motor, a support column, and a brush slip ring. Four corresponding locking blocks are fixed to the lower end of the network tube. A chuck is provided at the lower end of the network tube, and four corresponding slots are opened at the upper end of the chuck. The locking blocks engage with the corresponding slots. A connecting block is fixed to the lower end of the chuck, and the connecting block is rotatably connected to the inside of the connecting frame. A second motor is mounted on the side of the connecting frame, and the output shaft of the second motor is fixed to the side of the corresponding connecting block. A support column is rotatably connected to the lower side of the connecting frame. The support column has a brush slip ring installed on its circumference. The input end of the brush slip ring is electrically connected to the output end of an external PLC controller, and the output end of the brush slip ring is electrically connected to the input end of a second motor. Through the snap-fit ​​structure of the locking block and the chuck, the network tube and the drive mechanism can be detachably connected, which is convenient for maintenance or replacement. The second motor drives the connecting block to rotate, causing the chuck to tilt. After the chuck tilts, the dewatered sludge will flow downward into the interior of the guide ring. The application of the brush slip ring can provide stable power and control signals to the second motor on the rotating support column, ensuring drive reliability.

[0009] Furthermore, the flow guiding assembly includes a flow guiding ring, a conical ring, an electric telescopic rod, and a support frame. The flow guiding ring is fixed to the lower side of the mounting box, the support column is located inside the flow guiding ring, the conical ring is fixed to the lower end of the flow guiding ring, the support frame is fixed to the lower end inside the conical ring, the electric telescopic rod is installed on the upper side of the support frame, the telescopic arm of the electric telescopic rod is fixed to the lower end of the support column, and the input end of the electric telescopic rod is electrically connected to the output end of an external PLC controller. Through the funnel-shaped structure of the flow guiding ring and the conical ring, the sludge after water has been removed from the mesh pipe can be effectively collected and then injected into the interior of the feeding assembly.

[0010] Furthermore, the feeding assembly includes a feeding hopper, a screw conveyor, a third motor, an extrusion disc, and forming holes. The lower end of the conical ring is fixed inside the feed inlet located on the upper left side of the feeding hopper surface. The screw conveyor is rotatably connected inside the feeding hopper. The third motor is installed at the left end of the feeding hopper, and the output shaft of the third motor is fixed at the left end of the screw conveyor. The extrusion disc is fixed at the right end of the feeding hopper, and the right end of the extrusion disc has evenly distributed forming holes. The input end of the third motor is electrically connected to the output end of an external PLC controller. By driving the screw conveyor to rotate through the third motor, the pre-dehydrated sludge can be stably and continuously conveyed from the feed inlet to the right. Through the extrusion disc fixed at the end and its forming holes, the conveyed sludge can be subjected to extrusion pressure, causing it to pass through the forming holes of a specific shape, thereby forming a strip-shaped wet sludge blank, preparing it for subsequent drying and resource utilization.

[0011] Furthermore, the drying assembly includes a discharge frame, a belt conveyor, an installation frame, a warm air blower, and a temperature sensor. The discharge frame is fixed to the right side of the lower end of the surface of the feeding barrel. The belt conveyor is installed on the upper side of the discharge frame. The installation frame is fixed to the right end of the upper side of the discharge frame. A strip-shaped opening is opened on the upper side of the installation frame. A warm air blower is installed inside the strip-shaped opening. A temperature sensor is installed on the upper side inside the installation frame. The temperature sensor is bidirectionally electrically connected to an external PLC controller. The input end of the warm air blower is electrically connected to the output end of the external PLC controller. The belt conveyor can receive the shaped wet sludge strips extruded from the extrusion plate and make them pass through the drying area at a uniform speed. The warm air blown into the conveying channel in the installation frame by the warm air blower can dry and dehydrate the moving shaped sludge strips. The temperature sensor monitors the temperature of the drying area and feeds it back to the PLC controller. The PLC controller performs closed-loop control of the warm air blower (64) according to the temperature signal fed back by the temperature sensor (65) to keep the drying temperature stable.

[0012] Furthermore, the cutting assembly includes a mounting bracket, a fourth motor, a rotating shaft, a connecting ring, and an arc-shaped cutting blade. The mounting bracket is fixed to the right side of the upper surface of the feeding hopper. The fourth motor is mounted on the right side of the mounting bracket. A rotating shaft is fixed to the output shaft of the fourth motor. A connecting ring is fixed to the left end of the rotating shaft's circumference. An arc-shaped cutting blade is fixed to the circumference of the connecting ring. The arc-shaped cutting blade is in contact with the right end of the extrusion disc. The input end of the fourth motor is electrically connected to the output end of an external PLC controller. The fourth motor drives the rotating shaft and connecting ring to rotate, which in turn drives the arc-shaped cutting blade to perform circular motion. Because the arc-shaped cutting blade is in contact with the right end of the extrusion disc, when the sludge is extruded from the forming hole to a certain length, the rotating cutting blade can cut it off, thus obtaining sludge segments of uniform length, facilitating subsequent packaging, transportation, or direct resource utilization.

[0013] Furthermore, the extrusion assembly includes a hydraulic rod and an extrusion disc. The hydraulic rod is mounted on the upper side of the mounting box, and the extrusion disc is fixed on the telescopic arm of the hydraulic rod. The extrusion disc corresponds to the mesh tube. The input end of the hydraulic rod is electrically connected to the output end of an external PLC controller. By driving the extrusion disc downward through the hydraulic rod, mechanical pressure can be applied to the sludge located in the mesh tube, assisting the centrifugal dewatering process of the dewatering assembly and achieving a combined dewatering effect of centrifugation and extrusion, thereby significantly improving the dewatering efficiency and dryness of the sludge.

[0014] Furthermore, the injection assembly includes an L-shaped injection pipe, a connecting flange ring, and an arc-shaped baffle. An opening is provided on the right side of the mounting box, and the L-shaped injection pipe is fixed inside the opening. The connecting flange ring is fixed to the upper end of the surface of the L-shaped injection pipe. An arc-shaped baffle is provided inside the mounting box, and the arc-shaped baffle fits against the surface of the mesh tube. A fixing hole is provided in the middle of the arc-shaped baffle, and the left end of the L-shaped injection pipe is fixed inside the fixing hole. Through the L-shaped injection pipe and the connecting flange ring on it, an external feeding pipe can be easily connected to guide the papermaking sludge to be treated into the interior of the mesh tube.

[0015] Furthermore, two corresponding support plates are fixed to the lower side of the mounting box, and a base plate is fixed to the lower side of the two support plates. The support plates and the base plate form a stable frame structure, which can provide a solid support foundation for the mounting box and all its internal components, ensuring that the entire device operates smoothly and with shock absorption, and facilitating on-site installation and positioning.

[0016] A molding method for a papermaking sludge dewatering, drying, and resource recovery molding device includes the following steps:

[0017] S1: Injection: The papermaking sludge to be treated is injected into the inside of the mesh tube through the injection component;

[0018] S2: Composite dewatering: The first motor is started to drive the mesh tube to rotate and generate centrifugal force. At the same time, the hydraulic rod is started to drive the extrusion plate to move downward to apply mechanical pressure, so as to perform centrifugal and extrusion composite dewatering on the sludge in the mesh tube.

[0019] S3: Inclined discharge: After dewatering, the electric telescopic rod retracts to lower the chuck, and the second motor drives the connecting block to rotate to tilt the chuck. The dewatered sludge blocks fall into the guide assembly under the action of gravity.

[0020] S4: Conveying and molding: The sludge enters the feeding bucket through the guide component. The third motor drives the screw conveyor to convey and compact the sludge to the right. Finally, it is extruded through the molding hole on the extrusion plate to form a strip-shaped wet sludge blank.

[0021] S5: Synchronous cutting: During the extrusion process, the fourth motor drives the arc-shaped cutting blade to rotate and cut the extruded strip of wet clay into fixed lengths;

[0022] S6: Closed-loop temperature-controlled drying: The cut mud section enters the belt conveyor and passes through the mounting frame at a uniform speed. The warm air blower blows warm air into the frame. The temperature sensor monitors the temperature in real time and feeds it back to the PLC controller. The PLC controller adjusts the output of the warm air blower according to the feedback to keep the drying temperature stable within the preset range.

[0023] This device achieves a technical effect superior to the simple superposition of the functions of each unit through the coordinated cooperation of its various units. The specific effects of this coordinated technology are as follows:

[0024] Centrifugal dewatering and mechanical extrusion work together: The mesh pipe and the extrusion disc share the same working chamber. An axial pressure field is superimposed on the rotating centrifugal force field to form a composite stress field, which makes the sludge dewatering efficiency and dryness significantly higher than that of a single dewatering method.

[0025] Multifunctional chuck: The chuck serves two purposes: during the dewatering process, it forms a closed extrusion chamber together with the inner wall of the mesh tube and the extrusion plate; after dewatering, it tilts to guide the sludge out, simplifying the structure and avoiding the need for additional unloading valves.

[0026] Gravity-guided synergy: The conical ring relies on the gravity of the sludge itself to achieve direct and smooth material guidance from the dewatering station to the forming station, eliminating the need for intermediate mechanical conveying devices and reducing equipment complexity and potential failure points.

[0027] Extrusion and cutting are synchronized and coordinated: The rotating cutting blade and the fixed extrusion disc work closely together to cut the sludge to a fixed length while it is being continuously extruded, ensuring the consistency of the final output sludge segment length.

[0028] Process integration and closed-loop temperature control: The dewatering, molding, cutting and drying processes are integrated into one, and closed-loop temperature control is adopted to make use of the residual heat of the sludge after the previous dewatering, reduce the heat loss in the intermediate links, and achieve overall energy consumption optimization and precise control of the moisture content of the final product.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: This papermaking sludge dewatering, drying, and resource-based molding device has the following advantages:

[0030] 1. By integrating dehydration, forming, cutting and drying processes into a single unit and realizing automatic and continuous material flow, it can effectively avoid the problems of multiple transfers, material spillage and secondary pollution caused by traditional separate equipment, significantly improve the automation level of the production line, and reduce operating energy consumption and floor space.

[0031] 2. By adopting a combined dewatering method that combines centrifugal dewatering and mechanical extrusion, and using a tiltable chuck structure to guide the material downwards, the dewatering efficiency and dryness of sludge can be significantly improved, creating more favorable initial conditions for subsequent molding and deep drying, thereby improving the energy efficiency of the entire treatment process.

[0032] 3. Through the close coordination of spiral conveying compaction molding, rotary cutting to fixed length and closed-loop temperature-controlled drying process, it is possible to ensure that the final sludge particles have a uniform shape, consistent specifications and stable moisture content, thereby greatly improving their physical strength, storage stability and utilization value as resource products such as fuel or building material additives.

[0033] 4. Due to the coordinated operation of the various functional units, this device also produces unexpected additional beneficial effects, including: simplifying the equipment structure and eliminating the need for intermediate unloading valves and other transfer mechanisms between the dewatering and forming stations; achieving seamless connection between stations and basically avoiding sludge spillage and secondary pollution during the transfer process; and the integrated and compact design effectively reduces the floor space occupied by the entire treatment equipment. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0035] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0036] Figure 3 This is a front sectional view of the present invention;

[0037] Figure 4 For the present invention Figure 3 Enlarged view of section B in the middle;

[0038] Figure 5 For the present invention Figure 3 Enlarged view at point C;

[0039] Figure 6 This is a schematic diagram of the feeding assembly structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the sewage pipe of the present invention.

[0041] In the diagram: 1. Mounting box; 2. Dehydration assembly; 21. First motor; 22. Gear; 23. Mesh tube; 24. Gear ring; 25. Protective shell; 3. Support assembly; 31. Clamping block; 32. Chuck; 33. Connecting block; 34. Connecting frame; 35. Second motor; 36. Support column; 37. Brush slip ring; 4. Guide assembly; 41. Guide ring; 42. Conical ring; 43. Electric telescopic rod; 44. Support frame; 5. Feeding assembly; 51. Feeding bucket; 52. Spiral conveyor rod; 53. Third motor; 54. Extrusion disc; 55. Forming hole; 6. Drying assembly; 61. Discharge frame; 62. Belt conveyor; 63. Mounting frame; 64. Warm air blower; 65. Temperature sensor; 7. Cutting assembly; 71. Mounting bracket; 72. Fourth motor; 73. Rotary shaft; 74. Connecting ring; 75. Arc-shaped cutting blade; 8. Extrusion assembly; 81. Hydraulic rod; 82. Extrusion disc; 9. Injection assembly; 91. L-shaped injection pipe, 92 connecting flange ring, 93 arc-shaped baffle, 10 support plate, 11 base plate, 12 drain pipe, 13 solenoid valve. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figure 1-7 This embodiment provides a technical solution: a papermaking sludge dewatering, drying and resource-based molding device, including a mounting box 1 and a dewatering component 2;

[0044] Installation box 1: A feeding component 9 is installed on the right side. An extrusion component 8 is installed on the upper side inside the installation box 1. A flow guiding component 4 is installed on the lower side of the installation box 1. A support component 3 is installed inside the flow guiding component 4. A feeding component 5 is installed at the lower end of the flow guiding component 4. A drying component 6 is installed at the right end of the feeding component 5. A cutting component 7 is installed on the right side of the upper surface of the feeding component 5. A sewage discharge pipe 12 is fixed inside the sewage discharge port on the left side of the installation box 1. A solenoid valve 13 is installed on the circumferential surface of the sewage discharge pipe 12. The input end of the solenoid valve 13 is electrically connected to the output end of an external PLC controller. Through the sewage discharge pipe 12 set on the side of the installation box 1, the wastewater separated from the sludge during the dewatering process can be discharged in a concentrated manner. The opening and closing of the sewage discharge pipe 12 is automatically controlled by the solenoid valve 13. Sewage can be discharged at timed intervals or according to conditions as needed, so as to realize the programmed and automated management of the dewatering process.

[0045] Dewatering assembly 2 includes a first motor 21, a gear 22, a mesh tube 23, a gear ring 24, and a protective shell 25. The first motor 21 is installed on the lower side of the mounting box 1. The gear 22 is fixed on the output shaft of the first motor 21. A rotating hole is opened on the lower side of the mounting box 1. The mesh tube 23 is rotatably connected inside the rotating hole. The gear ring 24 is fixed to the lower end of the surface of the mesh tube 23. The gear ring 24 meshes with the gear 22. The protective shell 25 is fixed to the lower side inside the mounting box 1. An opening is opened on the upper side of the protective shell 25. The mesh tube 23 is located inside the opening. The gear ring 24 and the gear 22 are both located inside the protective shell 25. The input end of the first motor 21 is electrically connected to the output end of an external PLC controller. The dewatering assembly 2 drives the gear 22 to mesh with the gear ring 24 through the first motor 21, which drives the mesh tube 23 to rotate. Centrifugal force is used to achieve sludge dewatering. The protective shell 25 can protect the transmission components and prevent water splashing.

[0046] The support assembly 3 includes a locking block 31, a chuck 32, a connecting block 33, a connecting frame 34, a second motor 35, a support column 36, and a brush slip ring 37. Four corresponding locking blocks 31 are fixed to the lower end of the inside of the network tube 23. A chuck 32 is provided at the lower end of the inside of the network tube 23, and four corresponding slots are opened at the upper end of the chuck 32. The locking blocks 31 engage with the corresponding slots. A connecting block 33 is fixed to the lower end of the chuck 32 and is rotatably connected to the inside of the connecting frame 34. A second motor 35 is mounted on the side of the connecting frame 34, and the output shaft of the second motor 35 is fixed to the side of the corresponding connecting block 33. A support column 36 is rotatably connected to the lower side of the connecting frame 34. A brush slip ring 37 is installed on the circumferential surface of the support column 36. The input end of the brush slip ring 37 is electrically connected to the output end of an external PLC controller, and the output end of the brush slip ring 37 is electrically connected to the input end of the second motor 35. Through the snap-fit ​​structure of the locking block 31 and the chuck 32, the network tube 23 and the drive mechanism can be detachably connected, which is convenient for maintenance or replacement. The second motor 35 drives the connecting block 33 to rotate, causing the chuck 32 to tilt. After the chuck 32 tilts, the dewatered sludge will enter the interior of the guide ring 41. The application of the brush slip ring 37 can provide stable power and control signals to the second motor 35 on the rotating support column 36, ensuring drive reliability.

[0047] The flow guiding assembly 4 includes a flow guiding ring 41, a conical ring 42, an electric telescopic rod 43, and a support frame 44. The flow guiding ring 41 is fixed to the lower side of the mounting box 1. The support column 36 is located inside the flow guiding ring 41. The conical ring 42 is fixed to the lower end of the flow guiding ring 41. The support frame 44 is fixed to the lower end inside the conical ring 42. The electric telescopic rod 43 is installed on the upper side of the support frame 44. The telescopic arm of the electric telescopic rod 43 is fixed to the lower end of the support column 36. The input end of the electric telescopic rod 43 is electrically connected to the output end of an external PLC controller. Through the funnel-shaped structure of the flow guiding ring 41 and the conical ring 42, the sludge after the water has been removed from the mesh pipe 23 can be effectively collected and then injected into the interior of the feeding assembly 5.

[0048] The feeding assembly 5 includes a feeding barrel 51, a screw conveyor 52, a third motor 53, an extrusion plate 54, and forming holes 55. The lower end of the conical ring 42 is fixed inside the feed inlet located on the upper left side of the surface of the feeding barrel 51. The screw conveyor 52 is rotatably connected inside the feeding barrel 51. The third motor 53 is installed at the left end of the feeding barrel 51, and the output shaft of the third motor 53 is fixed at the left end of the screw conveyor 52. The extrusion plate 54 is fixed at the right end of the feeding barrel 51, and the right end of the extrusion plate 54 has uniformly distributed forming holes 55. The input end of the third motor 53 is electrically connected to the output end of an external PLC controller. By driving the screw conveyor 52 to rotate through the third motor 53, the sludge after preliminary dewatering can be stably and continuously conveyed from the feed inlet to the right. Through the extrusion plate 54 fixed at the end and the forming holes 55 thereon, the conveyed sludge can be subjected to extrusion pressure, so that it passes through the forming holes 55 of a specific shape, thereby forming a strip-shaped wet sludge blank, which is prepared for subsequent drying and resource utilization.

[0049] The drying assembly 6 includes a discharge frame 61, a belt conveyor 62, a mounting frame 63, a heater 64, and a temperature sensor 65. The discharge frame 61 is fixed to the lower right side of the feeding hopper 51. The belt conveyor 62 is mounted on the upper side of the discharge frame 61. The mounting frame 63 is fixed to the upper right end of the discharge frame 61. A slotted opening is provided on the upper side of the mounting frame 63, and the heater 64 is installed inside the slot. The temperature sensor 65 is installed on the upper side inside the mounting frame 63. The temperature sensor 65 is bidirectionally electrically connected to an external PLC controller. The input end of the blower 64 is electrically connected to the output end of an external PLC controller. Through the belt conveyor 62, it can receive the shaped wet sludge strips extruded from the extrusion plate 54 and make them pass through the drying area at a uniform speed. The warm air blower 64 blows warm air into the conveying channel in the mounting frame 63, which can dry and dehydrate the moving shaped sludge strips. The temperature sensor 65 monitors the temperature of the drying area and feeds it back to the PLC controller. The PLC controller performs closed-loop control of the warm air blower 64 based on the temperature signal fed back by the temperature sensor 65 to keep the drying temperature stable.

[0050] The cutting assembly 7 includes a mounting bracket 71, a fourth motor 72, a rotating shaft 73, a connecting ring 74, and an arc-shaped cutting blade 75. The mounting bracket 71 is fixed to the right side of the upper surface of the feeding hopper 51. The fourth motor 72 is mounted on the right side of the mounting bracket 71. A rotating shaft 73 is fixed to the output shaft of the fourth motor 72. A connecting ring 74 is fixed to the left end of the circumferential surface of the rotating shaft 73. An arc-shaped cutting blade 75 is fixed to the circumferential surface of the connecting ring 74. The arc-shaped cutting blade 75 is in contact with the right end of the extrusion disc 54. The input end of the fourth motor 72 is electrically connected to the output end of an external PLC controller. The fourth motor 72 drives the rotating shaft 73 and the connecting ring 74 to rotate, which in turn drives the arc-shaped cutting blade 75 to perform circular motion. Because the arc-shaped cutting blade 75 is in contact with the right end of the extrusion disc 54, when the sludge is extruded from the forming hole 55 to a certain length, the rotating cutting blade can cut it off, thus obtaining sludge segments of uniform length, facilitating subsequent packaging, transportation, or direct resource utilization.

[0051] The extrusion assembly 8 includes a hydraulic rod 81 and an extrusion disc 82. The hydraulic rod 81 is installed on the upper side of the mounting box 1. The extrusion disc 82 is fixed on the telescopic arm of the hydraulic rod 81. The extrusion disc 82 corresponds to the mesh tube 23. The input end of the hydraulic rod 81 is electrically connected to the output end of an external PLC controller. The extrusion disc 82 is driven to move downward through the hydraulic rod 81, which can apply mechanical pressure to the sludge located in the mesh tube 23, assist the centrifugal dewatering process of the dewatering assembly 2, and achieve a combined dewatering effect of centrifugation and extrusion, thereby significantly improving the dewatering efficiency and dryness of the sludge.

[0052] The feeding assembly 9 includes an L-shaped feeding pipe 91, a connecting flange ring 92, and an arc-shaped baffle 93. An opening is provided on the right side of the mounting box 1, and the L-shaped feeding pipe 91 is fixed inside the opening. The connecting flange ring 92 is fixed to the upper end of the surface of the L-shaped feeding pipe 91. An arc-shaped baffle 93 is provided inside the mounting box 1. The arc-shaped baffle 93 fits against the surface of the mesh tube 23. A fixing hole is provided in the middle of the arc-shaped baffle 93. The left end of the L-shaped feeding pipe 91 is fixed inside the fixing hole. Through the L-shaped feeding pipe 91 and the connecting flange ring 92 on it, an external feeding pipe can be easily connected to guide the papermaking sludge to be treated into the interior of the mesh tube 23.

[0053] Among them, two corresponding support plates 10 are fixed on the lower side of the mounting box 1, and a base plate 11 is fixed on the lower side of the two support plates 10. The support plates 10 and the base plate 11 form a stable frame structure, which can provide a solid support foundation for the mounting box 1 and all its internal components, ensuring that the entire device is stable and shock-absorbing during operation, and facilitating on-site installation and positioning.

[0054] A molding method for a papermaking sludge dewatering, drying, and resource recovery molding device includes the following steps:

[0055] S1: Injection: The papermaking sludge to be treated is injected into the inside of the mesh tube 23 through the injection component 9;

[0056] S2: Composite dewatering: Start the first motor 21 to drive the mesh tube 23 to rotate and generate centrifugal force. At the same time, start the hydraulic rod 81 to drive the extrusion plate 82 to move downward and apply mechanical pressure to perform centrifugal and extrusion composite dewatering on the sludge in the mesh tube 23.

[0057] S3: Inclined discharge: After dewatering, the electric telescopic rod 43 retracts to lower the chuck 32, and the second motor 35 drives the connecting block 33 to rotate to tilt the chuck 32. The dewatered sludge blocks fall into the guide assembly 4 under the action of gravity.

[0058] S4: Conveying and molding: The sludge enters the feeding bucket 51 through the guide component 4. The third motor 53 drives the screw conveyor 52 to convey and compact the sludge to the right. Finally, it is extruded through the molding hole 55 on the extrusion plate 54 to form a strip-shaped wet sludge blank.

[0059] S5: Synchronous cutting: During the extrusion process, the fourth motor 72 drives the arc-shaped cutting blade 75 to rotate and cut the extruded strip of wet clay into fixed lengths; the speed ratio of the fourth motor (72) to the speed of the third motor (53) is adjusted by the PLC controller so that the length of the cut clay segment reaches the preset value (the preset value is 20-50mm).

[0060] S6: Closed-loop temperature control drying: The cut mud section enters the belt conveyor 62 and passes through the mounting frame 63 at a uniform speed. The warm air blower 64 blows warm air into the frame. The temperature sensor 65 monitors the temperature in real time and feeds it back to the PLC controller. The PLC controller adjusts the output of the warm air blower 64 according to the feedback to keep the drying temperature stable within the preset range.

[0061] During the dewatering process, the chuck 32 is in a horizontal position, forming a closed extrusion chamber together with the inner wall of the mesh tube 23 and the extrusion disc 82. After dewatering, the chuck 32 tilts under the drive of the second motor 35, while the electric telescopic rod 43 drives the support column 36 to descend, causing the sludge blocks to automatically slide into the guide assembly 4.

[0062] When the hydraulic rod 81 drives the extrusion disc 82 downward, the chuck 32 is in a horizontal position, forming a closed extrusion chamber together with the inner wall of the mesh pipe 23 and the extrusion disc 82, so that the sludge bears additional axial pressure in addition to centrifugal force. After dewatering, the chuck 32 tilts, and the sludge blocks fall directly into the lower conical ring 42 under the action of gravity, without the need for an additional unloading mechanism.

[0063] The working principle of the papermaking sludge dewatering, drying, and resource-based molding device provided by this invention is as follows: First, the papermaking sludge to be treated is introduced into the dewatering component 2 inside the device through the L-shaped injection pipe 91 of the injection component 9, specifically into a rotatable mesh tube 23; after startup, the first motor 21 of the dewatering component 2 drives the gear 22 to rotate, and the gear 22 meshes with the gear ring 24 fixed at the lower end of the mesh tube 23, thereby driving the entire mesh tube 23 to rotate at high speed. The centrifugal force generated is used to throw the water in the sludge through the mesh of the mesh tube 23, achieving preliminary dewatering. At the same time, the hydraulic rod 81 of the extrusion component 8 drives its extrusion disc 82 to move downward, extruding the sludge inside the mesh tube 23. The sludge is subjected to downward mechanical pressure, forming a composite dewatering process combining centrifugation and extrusion, which significantly improves dewatering efficiency and dryness. Wastewater separated during dewatering is collected and discharged through a drain pipe 12 on the side of the mounting box 1, with a solenoid valve 13 controlled by an external PLC controller. After dewatering, the electric telescopic rod 43 retracts, causing the chuck 32 to descend into the guide ring 41. Then, the second motor 35 drives the connecting block 33 to rotate, tilting the chuck 32 and guiding the dewatered sludge blocks down from the chuck 32. The falling sludge enters the guide ring 41 and conical ring 42 below, and is then collected and guided by the conical ring 42 to the conveyor belt. The feeding assembly 5 has a feed inlet; the third motor 53 of the feeding assembly 5 drives the screw conveyor 52 to rotate, stably conveying the sludge from the feed inlet to the right. During the conveying process, the sludge is continuously compacted and pushed towards the extrusion disc 54 at the end. Finally, under pressure, it is extruded into continuous strip-shaped wet sludge blanks through multiple forming holes 55 on the extrusion disc 54. Immediately afterwards, the fourth motor 72 of the cutting assembly 7 drives the rotating shaft 73 and the connecting ring 74 to rotate, causing the arc-shaped cutting blade 75 on the connecting ring 74 to perform a circular motion. Since the cutting edge of the arc-shaped cutting blade 75 is in close contact with the right end face of the extrusion disc 54, it cuts the continuously extruded strip-shaped wet sludge blanks into uniform sludge segments of a specified length; the cut sludge The mud segment naturally falls onto the drying assembly 6 below and lands on the belt conveyor 62. The belt conveyor 62 carries the mud segment at a constant speed through the drying channel formed by the mounting frame 63. At this time, the warm air blower 64 blows warm air into the channel to dry and dehydrate the mud segment. The temperature sensor 65 installed in the channel monitors the temperature in real time and feeds it back to the PLC controller to realize closed-loop control of the warm air blower and ensure stable drying temperature. Finally, the dried and dehydrated mud segment is output from the end of the belt conveyor 62, becoming a shaped product that is easy to transport and utilize. In this way, the entire process from feeding, dehydration, conveying, shaping, cutting to drying can be integrated, automated and continuous.

[0064] To verify the actual effect of this device, an operational test was conducted using papermaking sludge with a moisture content of approximately 85% as raw material. After processing by this device: In the composite dewatering stage, under the conditions of a rotation speed of 300 r / min on the mesh tube 23 and a pressure of 0.5 MPa on the extrusion disc 82, the moisture content of the sludge decreased from 85% to below 65% within 3 minutes, with the dewatering efficiency increasing by approximately 40% compared to single centrifugal dewatering; After being compacted by the screw conveyor 52 and extruded from the forming hole 55, and then cut by the arc-shaped cutting blade 75, the resulting wet sludge blanks were of uniform size; Finally, under the hot air provided by the warm air fan 64 at 100±5℃, the sludge was conveyed by the belt conveyor 62 to complete the drying process, and the final output sludge particles had a stable moisture content of below 20%, and the compressive strength of the particles was significantly higher than that of products from traditional processes. The unit processing energy consumption was reduced by approximately 25% compared to traditional split-type equipment.

[0065] In a preferred embodiment of the present invention, the aperture of the mesh tube 23 is preferably 0.5-2mm, the drying temperature is preferably 80-120℃, the cutting blade can be made of ceramic or hard alloy to improve durability, and the motor speed can be adjusted by an external frequency converter to adapt to the treatment needs of different sludge.

[0066] This device achieves superior results compared to the simple sum of individual units through the following synergistic effects: centrifugation and extrusion share a common mesh cavity, forming a composite stress field and improving dewatering efficiency; the chuck has the dual functions of a closed extrusion chamber and inclined discharge, simplifying the structure; the conical ring guides the material directly by gravity, eliminating the need for intermediate conveying devices; rotary cutting and extrusion molding are carried out simultaneously, ensuring consistent mud section length; closed-loop temperature-controlled drying is combined with the preceding dewatering process, achieving optimized energy consumption and controllable moisture content.

[0067] It is worth noting that the external PLC controller disclosed in the above embodiments is specifically a Siemens S7-200. The first motor 21, the second motor 35, the third motor 53, the fourth motor 72, the electric telescopic rod 43, the hydraulic rod 81, the solenoid valve 13, the heater 64, the belt conveyor 62, the temperature sensor 65, and the brush slip ring 37 can be freely configured according to the actual application scenario. The external PLC controller controls the operation of the first motor 21, the second motor 35, the third motor 53, the fourth motor 72, the electric telescopic rod 43, the hydraulic rod 81, the solenoid valve 13, the heater 64, the belt conveyor 62, and the temperature sensor 65 using methods commonly used in the prior art.

[0068] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A device for dewatering, drying, and resource-based molding of papermaking sludge, characterized in that: Includes a mounting box (1) and a dehydration assembly (2); Installation box (1): A material injection component (9) is installed on the right side. An extrusion component (8) is installed on the upper side inside the installation box (1). A flow guiding component (4) is installed on the lower side of the installation box (1). A support component (3) is installed inside the flow guiding component (4). A feeding component (5) is installed at the lower end of the flow guiding component (4). A drying component (6) is installed at the right end of the feeding component (5). A cutting component (7) is installed on the right side of the upper surface of the feeding component (5). Dehydration assembly (2): includes a first motor (21), a gear (22), a mesh tube (23), a gear ring (24), and a protective shell (25). The first motor (21) is installed on the lower side of the mounting box (1). A gear (22) is fixed on the output shaft of the first motor (21). A rotating hole is opened on the lower side of the mounting box (1). A mesh tube (23) is rotatably connected inside the rotating hole. A gear ring (24) is fixed at the lower end of the surface of the mesh tube (23). The gear ring (24) meshes with the gear (22). A protective shell (25) is fixed on the lower side inside the mounting box (1). An opening is opened on the upper side of the protective shell (25). The mesh tube (23) is located inside the opening. The gear ring (24) and the gear (22) are both located inside the protective shell (25). The input end of the first motor (21) is electrically connected to the output end of an external PLC controller.

2. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 1, characterized in that: The support assembly (3) includes a locking block (31), a chuck (32), a connecting block (33), a connecting frame (34), a second motor (35), a support column (36), and a brush slip ring (37). Four corresponding locking blocks (31) are fixed to the lower end of the network tube (23). A chuck (32) is provided at the lower end of the network tube (23). Four corresponding slots are opened at the upper end of the chuck (32). The locking blocks (31) are engaged in the corresponding slots. A connecting block (33) is fixed to the lower end of the chuck (32). Block (33) is rotatably connected inside the connecting frame (34). A second motor (35) is installed on the side of the connecting frame (34). The output shaft of the second motor (35) is fixed on the side of the corresponding connecting block (33). A support column (36) is rotatably connected to the lower side of the connecting frame (34). A brush slip ring (37) is installed on the circumferential surface of the support column (36). The input end of the brush slip ring (37) is electrically connected to the output end of an external PLC controller. The output end of the brush slip ring (37) is electrically connected to the input end of the second motor (35).

3. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 2, characterized in that: The flow guiding assembly (4) includes a flow guiding ring (41), a conical ring (42), an electric telescopic rod (43), and a support frame (44). The flow guiding ring (41) is fixed to the lower side of the mounting box (1). The support column (36) is located inside the flow guiding ring (41). The conical ring (42) is fixed to the lower end of the flow guiding ring (41). The support frame (44) is fixed to the lower end inside the conical ring (42). The electric telescopic rod (43) is installed on the upper side of the support frame (44). The telescopic arm of the electric telescopic rod (43) is fixed to the lower end of the support column (36). The input end of the electric telescopic rod (43) is electrically connected to the output end of an external PLC controller.

4. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 3, characterized in that: The feeding assembly (5) includes a feeding barrel (51), a spiral conveyor (52), a third motor (53), an extrusion plate (54), and forming holes (55). The lower end of the conical ring (42) is fixed inside the feed inlet located on the upper left side of the surface of the feeding barrel (51). The spiral conveyor (52) is rotatably connected inside the feeding barrel (51). The third motor (53) is installed on the left end of the feeding barrel (51). The output shaft of the third motor (53) is fixed on the left end of the spiral conveyor (52). The extrusion plate (54) is fixed on the right end of the feeding barrel (51). The right end of the extrusion plate (54) has evenly distributed forming holes (55). The input end of the third motor (53) is electrically connected to the output end of an external PLC controller.

5. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 4, characterized in that: The drying assembly (6) includes a discharge frame (61), a belt conveyor (62), a mounting frame (63), a heater (64), and a temperature sensor (65). The discharge frame (61) is fixed to the right side of the lower end of the surface of the feeding hopper (51). The belt conveyor (62) is installed on the upper side of the discharge frame (61). The mounting frame (63) is fixed to the right end of the upper side of the discharge frame (61). A strip-shaped opening is opened on the upper side of the mounting frame (63). The heater (64) is installed inside the strip-shaped opening. The temperature sensor (65) is installed on the upper side inside the mounting frame (63). The temperature sensor (65) is bidirectionally electrically connected to an external PLC controller. The input end of the heater (64) is electrically connected to the output end of the external PLC controller.

6. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 4, characterized in that: The cutting assembly (7) includes a mounting bracket (71), a fourth motor (72), a rotating shaft (73), a connecting ring (74), and an arc-shaped cutting blade (75). The mounting bracket (71) is fixed on the right side of the upper surface of the feeding barrel (51). The fourth motor (72) is mounted on the right side of the mounting bracket (71). The rotating shaft (73) is fixed on the output shaft of the fourth motor (72). The connecting ring (74) is fixed on the left end of the circumferential surface of the rotating shaft (73). The arc-shaped cutting blade (75) is fixed on the circumferential surface of the connecting ring (74). The arc-shaped cutting blade (75) is in contact with the right end of the extrusion disc (54). The input end of the fourth motor (72) is electrically connected to the output end of an external PLC controller.

7. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 1, characterized in that: The extrusion assembly (8) includes a hydraulic rod (81) and an extrusion disc (82). The hydraulic rod (81) is installed on the upper side of the mounting box (1). The extrusion disc (82) is fixed on the telescopic arm of the hydraulic rod (81). The extrusion disc (82) corresponds to the mesh tube (23). The input end of the hydraulic rod (81) is electrically connected to the output end of an external PLC controller.

8. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 1, characterized in that: The injection assembly (9) includes an L-shaped injection tube (91), a connecting flange ring (92), and an arc-shaped baffle (93). An opening is provided on the right side of the mounting box (1), and an L-shaped injection tube (91) is fixed inside the opening. A connecting flange ring (92) is fixed at the upper end of the surface of the L-shaped injection tube (91). An arc-shaped baffle (93) is provided inside the mounting box (1). The arc-shaped baffle (93) is in contact with the surface of the mesh tube (23). A fixing hole is provided in the middle of the arc-shaped baffle (93), and the left end of the L-shaped injection tube (91) is fixed inside the fixing hole.

9. The papermaking sludge dewatering, drying, and resource-based molding device according to claim 1, characterized in that: The mounting box (1) has two corresponding support plates (10) fixed on its lower side, and a base plate (11) is fixed on the lower side of the two support plates (10). The drain outlet on the left side of the installation box (1) is equipped with a drain pipe (12) fixed inside. A solenoid valve (13) is installed on the circumferential surface of the drain pipe (12). The input end of the solenoid valve (13) is electrically connected to the output end of an external PLC controller.

10. A molding method for a papermaking sludge dewatering, drying, and resource recovery molding device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Injection: The papermaking sludge to be treated is injected into the inside of the mesh tube (23) through the injection assembly (9); S2: Composite dewatering: Start the first motor (21) to drive the mesh pipe (23) to rotate and generate centrifugal force. At the same time, start the hydraulic rod (81) to drive the extrusion plate (82) to move downward and apply mechanical pressure to perform centrifugal and extrusion composite dewatering on the sludge in the mesh pipe (23). S3: Inclined discharge: After dewatering, the electric telescopic rod (43) retracts to lower the chuck (32), and the second motor (35) drives the connecting block (33) to rotate to tilt the chuck (32). The dewatered sludge blocks fall into the guide assembly (4) under the action of gravity. S4: Conveying and molding: The sludge enters the feeding bucket (51) through the guide assembly (4), and the third motor (53) drives the screw conveyor (52) to convey and compact the sludge to the right. Finally, it is extruded through the molding hole (55) on the extrusion plate (54) to form a strip-shaped wet sludge blank. S5: Synchronous cutting: During the extrusion process, the fourth motor (72) drives the arc-shaped cutting blade (75) to rotate, cutting the extruded strip of wet clay blank to a fixed length; S6: Closed-loop temperature control drying: The cut mud section enters the belt conveyor (62) and passes through the mounting frame (63) at a uniform speed. The warm air blower (64) blows warm air into the frame. The temperature sensor (65) monitors the temperature in real time and feeds it back to the PLC controller. The PLC controller adjusts the output of the warm air blower (64) according to the feedback to stabilize the drying temperature within the preset range.

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