Sludge resource treatment device for municipal engineering

Abstract

The present application relates to sludge treatment technical field, specifically to a kind of sludge resourceful treatment device for municipal engineering, including processing box, fixedly arranged fixed shell in the inside of processing box, and rotating inner container is rotationally arranged in the inside of fixed shell.The present application is continuously rotated by rotating inner container in the inside of fixed shell, cooperate with the polygonal wave-shaped reflecting surface specially provided in inner wall, make sludge continuously dynamic cross microwave wave peak and trough area in spiral falling process, the originally fixed standing wave node is scattered, microwave energy is uniformly projected to the full circumferential surface of sludge without dead angle, and heat energy utilization is greatly improved;At the same time, magnetostrictive transducer embedded in the outer wall of rotating inner container rotates synchronously with inner container, to ensure that ultrasonic energy directly acts on the core of sludge flow field that is turned over, microjet and shock wave generated by ultrasonic cavitation effect are used, and microwave thermal effect produces significant synergistic effect, and the process of sludge cell wall is accelerated.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a sludge resource utilization treatment device for municipal engineering. Background Technology

[0002] Municipal sludge treatment equipment belongs to the field of municipal environmental protection. It is mainly used to reduce and stabilize the sludge generated during the municipal sewage treatment process. In the field of municipal engineering sludge treatment, traditional resource-based treatment methods mainly rely on single thermal drying, aerobic fermentation or simple chemical stabilization technology.

[0003] Existing technologies have significant drawbacks in treating municipal sludge with high water content, high viscosity, and complex composition. First, conventional heating equipment often employs static or simply agitated chamber structures. During microwave or hot air heating, uneven temperature distribution easily occurs, leading to localized overheating and scorching of the sludge while the central area remains underheated. This results in low thermal efficiency and difficulty in completely eliminating deep-seated pathogens. Second, for mixing and conveying high-viscosity sludge, traditional single-shaft or twin-shaft mixers often have dead zones, causing material to easily bridge and clog at the inlet or adhere to scale on the inner wall of the chamber, reducing effective volume and making cleaning and maintenance difficult. Third, existing chemical agent addition methods are mostly external spraying or simple pipeline injection. These methods struggle to penetrate the interior of high-concentration sludge clumps, resulting in uneven agent distribution, excessively high local concentrations leading to secondary pollution, or incomplete reactions. This leads to low utilization rates of strong oxidants such as ozone and hydrogen peroxide, resulting in poor deodorization and cell-wall breaking effects.

[0004] Therefore, we propose a sludge resource utilization treatment device for municipal engineering. Summary of the Invention

[0005] The purpose of this invention is to provide a sludge resource utilization treatment device for municipal engineering. By continuously rotating the inner liner within the fixed outer shell, and with the specially designed polygonal wave-shaped reflective surface on the inner wall, the sludge dynamically passes through the microwave wave crests and troughs during its spiral descent, breaking up the originally fixed standing wave nodes. This achieves uniform projection of microwave energy onto the entire circumference of the sludge without dead angles, effectively avoiding local scorching and significantly improving the thermal energy utilization rate.

[0006] To achieve the above effects, the technical solution adopted by the present invention is as follows: a sludge resource utilization treatment device for municipal engineering, including a treatment box, a fixed outer shell fixedly provided inside the treatment box, and a rotating inner liner rotatably provided inside the fixed outer shell; a rotating feeding rack fixedly provided on the top of the rotating inner liner, a fixed feeding rack fixedly provided on the top of the treatment box, and the interior of the fixed feeding rack is rotatably connected to the outer circumferential surface of the rotating feeding rack; a discharge pipe fixedly provided at the bottom of the rotating inner liner, and the top end of the discharge pipe is rotatably connected to the middle of the bottom of the rotating inner liner. A drive servo motor is fixedly mounted on the top of the processing tank via a fixing frame, and a main stirring shaft is fixedly mounted on the bottom end of the output shaft of the drive servo motor via a coupling. The bottom end of the main stirring shaft extends into the interior of the rotating inner tank. A drive frame is fixedly mounted on the bottom of the rotating feed rack via a connecting frame, and several auxiliary stirring shafts are rotatably mounted inside the drive frame. One end of the main stirring shaft passes through the interior of the drive frame, and the surface of the main stirring shaft is rotatably connected to the interior of the drive frame. Spiral augers are fixedly mounted on the surfaces of the auxiliary stirring shafts, and several propeller blades are fixedly mounted on the surface of the main stirring shaft from top to bottom. A rotating frame is rotatably mounted inside the drive frame, and the interior of the rotating frame is fixedly connected to the surface of the main stirring shaft. An internal gear ring is fixedly mounted at the bottom inside the rotating frame, and driven gears are fixedly mounted on the top ends of the several auxiliary stirring shafts. The internal tooth surface of the internal gear ring meshes with the tooth surface of the several driven gears for transmission.

[0007] Preferably, a rotating support frame is fixedly provided at the bottom of the inner wall of the fixed outer shell, and a plurality of balls are rotatably provided at the bottom of the rotating inner liner, and the surfaces of the plurality of balls are rotatably connected to the top of the rotating support frame.

[0008] Preferably, the inner wall of the fixed outer shell is processed with a polygonal wavy reflective surface, and an inert gas is introduced between the inside of the fixed outer shell and the outside of the rotating inner liner for micro-positive pressure protection.

[0009] Preferably, shearing frames are fixedly provided on the surfaces of several auxiliary stirring shafts and the surface of the main stirring shaft, and each shearing frame is located at the bottom of the drive frame, with several shearing blades fixedly provided at equal angles at the bottom of each shearing frame.

[0010] Preferably, a guide frame is fixedly provided on the top of the processing box by a fixing frame, and an auxiliary material conveying pipe is fixedly provided on one side of the guide frame. An auxiliary material conveying cavity is provided inside the main stirring shaft. Several auxiliary material conveying holes are also provided on the surface of the main stirring shaft and inside the guide frame. The interior of the several auxiliary material conveying holes is connected to the interior of the auxiliary material conveying cavity.

[0011] Preferably, the rotating frame is further provided with an auxiliary material distribution cavity, and the surface of the main stirring shaft and located inside the rotating frame are provided with a number of auxiliary material distribution holes; the top ends of the number of auxiliary stirring shafts are rotatably connected to the bottom of the rotating frame, and the interior of the number of auxiliary stirring shafts is connected to the interior of the auxiliary material distribution cavity.

[0012] Preferably, the surface of the main stirring shaft and the surfaces of the several auxiliary stirring shafts are provided with several auxiliary material injection holes, and each auxiliary material injection hole is provided with a high-pressure nozzle inside.

[0013] Preferably, a plurality of transmission gears are fixedly provided at the bottom of the guide frame, and a drive gear is rotatably provided on the surface of the main stirring shaft and inside the rotating feed frame. The interior of the rotating feed frame meshes with the tooth surfaces of the plurality of drive gears, and the tooth surfaces of the drive gears mesh with the tooth surfaces of the plurality of transmission gears.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By continuously rotating the inner liner within the fixed outer shell, combined with the specially designed polygonal wave-shaped reflective surface on the inner wall, the sludge dynamically traverses the microwave wave crests and troughs during its spiral descent, breaking up the originally fixed standing wave nodes. This achieves uniform projection of microwave energy onto the entire circumference of the sludge without dead angles, effectively avoiding localized scorching and significantly improving thermal energy utilization. Simultaneously, the magnetostrictive transducer embedded in the outer wall of the rotating inner liner rotates synchronously with the inner liner, ensuring that ultrasonic energy directly acts on the core of the churning sludge flow field. The micro-jets and shock waves generated by the ultrasonic cavitation effect, together with the microwave thermal effect, produce a significant synergistic effect, accelerating the cell wall disruption process of the sludge. This allows heat and acoustic energy to penetrate deep into the sludge clumps, significantly improving sludge modification efficiency and pathogen inactivation effect. Furthermore, the inert gas micro-positive pressure environment between the layers isolates oxygen to prevent deflagration while utilizing its low thermal conductivity to construct a highly efficient heat insulation layer, further reducing heat loss and improving the operational safety and economy of the device.

[0015] 2. Through the specific rotational direction and gear transmission of the main and auxiliary stirring shafts, the right-handed propeller blades on the main stirring shaft and the left-handed auger on the auxiliary stirring shaft generate a powerful composite axial thrust in opposite rotations, forming a stable spiral upward flow field from bottom to top. The variable pitch design ensures high-torque propulsion in the high-viscosity area at the bottom and rapid conveying in the low-viscosity area at the top, avoiding material sedimentation and backflow. At the same time, the reverse rotation design of the rotating feed rack and the sludge inside the rotating inner tank creates a strong shearing and impact effect at the feed inlet, effectively preventing sludge bridging and adhesion blockage. Combined with the shearing blades rotating with the shaft to perform secondary fine cutting of the rising sludge, and the intense turbulence of the internal and external flow fields, the laminar boundary layer is completely eliminated, allowing sludge particles to achieve high-speed tumbling and dispersion in three dimensions within the cavity, significantly improving the mixing uniformity and mechanical crushing effect, and ensuring the uniformity of subsequent heat treatment and chemical reactions.

[0016] 3. In this invention, the reagent is initially premixed through the internal channels of the main stirring shaft, then further diverted to the interior of the accompanying auxiliary stirring shaft. Finally, it is injected precisely and synchronously into the core of the violently churning sludge clumps in a high-speed atomized jet form through high-pressure nozzles evenly distributed on the shaft surface, from both the central axial direction and multiple radial points. This internal injection design fully utilizes the planetary motion trajectory of the stirring shaft system to directly deliver trace amounts of ozone or hydrogen peroxide to the reaction front. The coupling effect of the microbubble generated by the high-pressure nozzles and the mechanical shear force greatly increases the contact surface area between the oxidant and the organic matter in the sludge, promoting the rapid generation and diffusion of free radicals. This mechanism not only achieves efficient cell wall disruption, immediate odor removal, and deep inactivation of pathogens in sludge with extremely low reagent dosages, but also effectively avoids side reactions caused by excessively high local reagent concentrations, significantly reducing operating costs and improving the overall efficiency of sludge resource utilization. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a sludge resource utilization treatment device for municipal engineering according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the processing box and the fixed outer shell according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the fixed outer shell and rotating inner liner structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the drive frame and main stirring shaft structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the drive gear and connecting frame structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the drive gear and transmission gear structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the drive frame and rotating frame structure according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the rotating frame and driven gear structure according to an embodiment of the present invention.

[0019] In the diagram, 1. Processing box; 2. Fixed outer shell; 3. Rotating inner liner; 4. Rotating support frame; 5. Rotating feed frame; 6. Fixed feeding frame; 7. Discharge pipe; 8. Drive servo motor; 9. Magnetostrictive transducer; 10. Drive frame; 11. Main stirring shaft; 12. Auxiliary stirring shaft; 13. Propeller blade; 14. Spiral auger; 15. Drive gear; 16. Transmission gear; 17. Connecting frame; 18. Rotating frame; 19. Internal gear ring; 20. Driven gear; 21. Shearing frame; 22. Guide frame; 23. Auxiliary material conveying pipe; 24. Auxiliary material conveying chamber; 25. Auxiliary material diversion chamber; 26. Auxiliary material diversion hole; 27. Auxiliary material conveying hole; 28. Auxiliary material spraying hole. Detailed Implementation

[0020] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Example 1

[0021] Please see Figures 1 to 8 As shown, this embodiment discloses a sludge resource utilization treatment device for municipal engineering, including a treatment box 1. A fixed outer shell 2 is fixedly installed inside the treatment box 1, and a rotating inner liner 3 is rotatably installed inside the fixed outer shell 2. A rotating feed rack 5 is fixedly installed on the top of the rotating inner liner 3, and a fixed feeding rack 6 is fixedly installed on the top of the treatment box 1. The inside of the fixed feeding rack 6 is rotatably connected to the outer circumference of the rotating feed rack 5. A discharge pipe 7 is fixedly installed at the bottom inside the rotating inner liner 3, and the top end of the discharge pipe 7 is rotatably connected to the middle of the bottom of the rotating inner liner 3. An electromagnetic control valve is also fixedly installed at the middle of the bottom of the rotating inner liner 3 to control the on / off control of the discharge of sludge inside the rotating inner liner 3. The top end of the discharge pipe 7 is rotatably connected to the bottom of the rotating inner liner 3 through a mechanical seal assembly made of silicon carbide to ensure no leakage in the high viscosity sludge environment. The control circuit of the electromagnetic control valve is led out to an external controller through a coaxial slip ring to achieve precise opening and closing in the rotating state.

[0022] Specifically, the inner wall of the fixed outer shell 2 is processed with a polygonal wavy reflective surface, and an inert gas is introduced between the inside of the fixed outer shell 2 and the outside of the rotating inner liner 3 to provide micro-positive pressure protection. This micro-positive pressure of 50-150 Pa is maintained within the interlayer through a pressure sensor and a solenoid valve linkage control. This isolates external oxygen, preventing the risk of flammable gas explosion caused by microwave heating, and utilizes the low thermal conductivity of the inert gas to form a heat insulation layer, reducing heat loss to the fixed outer shell 2. The outer circumference of the rotating inner liner 3 is also provided with several vertical grooves, and each vertical groove contains several magnetostrictive transducers 9. The radiating surface of the magnetostrictive transducers 9 is flush with or slightly protrudes 0.5-1 mm from the opening side of the vertical groove. A rotating support frame 4 is fixedly installed at the bottom of the inner wall of the fixed outer shell 2, and several ball bearings are rotatably mounted at the bottom of the rotating inner liner 3, with the surfaces of these ball bearings rotatably connected to the top of the rotating support frame 4.

[0023] It should be noted that the inner wall of the fixed outer shell 2 is preferably machined with a wave-shaped reflective surface with a regular octagonal cross section. The wave amplitude is 15-25mm and the wavelength is 1 / 2 to 1 times the microwave wavelength. This structure is designed to break up the standing wave nodes formed by microwaves in the cavity and to uniformly project microwave energy to the entire circumference of the rotating inner liner 3 through multiple reflections, avoiding local overheating or heating blind spots. The magnetostrictive transducer 9 is distributed in a spiral shape with a pitch of 1 / 3 of the height of the rotating inner liner 3. The power supply is introduced through a high-frequency conductive slip ring assembly set at the connection between the rotating feeder 5 and the fixed feeder 6 to ensure a continuous and stable input of ultrasonic energy in the rotating state.

[0024] It should also be noted that, in the above embodiments, the continuous rotation of the rotating inner liner 3 relative to the fixed outer shell 2, combined with the specially designed octagonal wave-shaped reflective surface on the inner wall of the fixed outer shell 2, completely breaks the uneven energy distribution phenomenon of the microwave standing wave field in the traditional static cavity. This allows the sludge to dynamically pass through the microwave peaks and troughs during its spiral descent, achieving uniform coverage of heating and ultrasonic cavitation without dead angles. This effectively avoids local scorching or processing blind spots, significantly improving thermal energy utilization and modification efficiency. Secondly, by embedding the magnetostrictive transducer 9 into the vertical groove on the outer wall of the rotating inner liner 3 and distributing it in a spiral pattern, the inner liner wall isolates the core transducer element from direct corrosion and wear by the sludge, extending the service life of the equipment. Furthermore, the close-fitting installation ensures efficient transmission of ultrasonic vibration energy. By penetrating into the sludge and combining it with the high-frequency conductive slip ring at the top for power supply, a continuous and stable ultrasonic field is applied during rotation. Furthermore, by maintaining a 50-150Pa inert gas micro-positive pressure environment between the fixed outer shell 2 and the rotating inner liner 3, not only is a highly efficient heat insulation layer constructed using the low thermal conductivity of the inert gas to reduce heat loss, but it also fundamentally blocks oxygen contact, eliminating the risk of deflagration caused by the release of flammable gases from the sludge due to microwave high-temperature excitation, while preventing the leakage of malodorous gases, significantly improving the inherent safety and environmental performance of the device. In addition, a silicon carbide mechanical seal assembly is used at the bottom to connect the discharge pipe 7 and the rotating inner liner 3, and a low-friction support structure composed of ball bearings and a rotating support frame 4 ensures long-term stable operation and zero-leakage discharge of the device under high viscosity and high load conditions.

[0025] Specifically, this embodiment overcomes the problem of uneven energy distribution by continuously rotating the inner liner 3 within the fixed outer shell 2. This is achieved through a combination of a regular octagonal wave-shaped reflective surface machined on the inner wall of the fixed outer shell 2, vertical grooves on the outer circumference of the inner liner 3, and an embedded magnetostrictive transducer 9. When the inner liner 3 rotates at high speed under the support of the rotating support frame 4 and ball bearings, the sludge material continuously changes its position relative to the microwave peaks and troughs within the cavity. The wave-shaped reflective surface performs multiple scattering of microwave energy to eliminate standing wave nodes, while the helically distributed magnetostrictive transducer 9 continuously receives electrical energy through a high-frequency conductive slip ring assembly and radiates ultrasonic waves into the sludge. This combination of dynamic rotational heating and ultrasonic cavitation ensures... The sludge receives energy from all sides without any blind spots, avoiding localized scorching or blind areas in the treatment process. At the same time, the 50 to 150 Pa micro-positive pressure inert gas environment maintained between the fixed outer shell 2 and the rotating inner tank 3 forms a double protective barrier. This not only utilizes the low thermal conductivity of the inert gas to reduce heat loss to the outside, but also completely isolates oxygen to prevent the risk of deflagration caused by the release of flammable gases from the sludge due to microwave high temperature. The bottom discharge pipe 7 is connected to the rotating inner tank 3 through a mechanical seal component made of silicon carbide and works in conjunction with an electromagnetic control valve to achieve zero-leakage and precise discharge under high-viscosity sludge conditions. The overall structure, through the precise coordination of dynamic and static elements and air pressure protection, significantly improves the thermal energy utilization rate, reaction uniformity, and inherent safety of the device operation. Example 2

[0026] Specifically, a drive servo motor 8 is fixedly mounted on the top of the processing box 1 via a fixing bracket, and a main stirring shaft 11 is fixedly mounted on the bottom end of the output shaft of the drive servo motor 8 via a coupling. The bottom end of the main stirring shaft 11 extends into the interior of the rotating inner liner 3. A drive frame 10 is fixedly mounted on the bottom of the rotating feed rack 5 via a connecting frame 17, and several auxiliary stirring shafts 12 are rotatably mounted inside the drive frame 10. One end of the main stirring shaft 11 passes through the interior of the drive frame 10, and the surface of the main stirring shaft 11 is rotatably connected to the interior of the drive frame 10. Spiral augers 14 are fixedly mounted on the surfaces of the several auxiliary stirring shafts 12, and several propeller blades 13 are fixedly mounted on the surface of the main stirring shaft 11 from top to bottom. A rotating frame 18 is rotatably mounted inside the drive frame 10, and the interior of the rotating frame 18 is fixedly connected to the surface of the main stirring shaft 11. An internal gear ring 19 is fixedly mounted at the bottom inside the rotating frame 18, and driven gears 20 are fixedly mounted on the top ends of the several auxiliary stirring shafts 12. The internal tooth surface of the internal gear ring 19 meshes with the tooth surface of the several driven gears 20 for transmission.

[0027] It should be noted that the drive servo motor 8 is configured to drive the main stirring shaft 11 to rotate counterclockwise when viewed from above; the several propeller blades 13 fixed on the surface of the main stirring shaft 11 are all right-handed helical structures. When the main stirring shaft 11 rotates counterclockwise, the right-handed propeller blades 13 generate an upward axial thrust on the sludge, continuously lifting the sludge located at the bottom of the rotating inner tank 3 along the axial direction to the upper middle area; at the same time, through the meshing transmission between the internal gear ring 19 and the driven gear 20, the auxiliary stirring shaft 12 rotates clockwise relative to the drive frame 10 while revolving around it; the auger 14 fixed on the surface of the auxiliary stirring shaft 12 is designed as a left-handed structure. When the auxiliary stirring shaft 12 rotates clockwise, the left-handed auger 14 also generates an upward axial force, assisting in turning the sludge from the bottom up, and at the same time using the centrifugal force generated by its high-speed rotation to break up the aggregated sludge and prevent the formation of dead zones.

[0028] Preferably, both the propeller blade 13 and the auger 14 adopt a variable pitch design. The blade segments near the bottom of the rotating inner tank 3 have a smaller pitch to provide greater propulsion torque in the high viscosity region; the blade segments near the top have a larger pitch to adapt to the rapid conveying requirements after the sludge moisture content increases, and to avoid material deposition or backflow due to sudden changes in flow velocity during the upward process. The blade inclination angle of the propeller blade 13 is set to 25°-35°, and the gap between its outer edge and the inner wall of the rotating inner tank 3 is controlled at 5-10mm to form a near-piston-like propulsion effect. The auger 14 is distributed along the entire length of the auxiliary stirring shaft 12, and the augers on adjacent auxiliary stirring shafts 12 are spatially staggered to ensure that an upward composite flow field can be formed on the entire cross-section of the rotating inner tank 3.

[0029] Furthermore, shearing frames 21 are fixedly provided on the surfaces of several auxiliary stirring shafts 12 and the surface of the main stirring shaft 11, and each shearing frame 21 is located at the bottom of the drive frame 10. Several shearing blades are fixedly provided at equal angles at the bottom of each shearing frame 21. The main stirring shaft 11 and auxiliary stirring shaft 12, together with the propeller blades 13 and the auger 14, form a stable, dead-angle-free spiral upward flow field of sludge in the rotating inner tank 3. After the sludge rises, it is sheared by the rotating shearing frame 21 and the shearing blades at its bottom, further improving the resource utilization effect of sludge.

[0030] Specifically, in this embodiment, the main stirring shaft 11 is driven to rotate counterclockwise by the servo motor 8. The right-handed propeller blades 13 fixed on the surface of the main stirring shaft 11 then generate a strong upward axial thrust, lifting the sludge at the bottom of the rotating inner tank 3 along the central axis to the upper middle region. At the same time, the main stirring shaft 11 drives the internal gear ring 19 to rotate through the fixed rotating frame 18. The internal gear ring 19 meshes with the driven gear 20 fixed at the top of the auxiliary stirring shaft 12, forcing several auxiliary stirring shafts 12 to rotate clockwise while revolving with the drive frame 10. The left-handed spiral auger 14 installed on the surface of the auxiliary stirring shaft 12 also generates an upward axial force to assist in the flow during its rotation, and uses centrifugal force to break up the agglomerated sludge. This main shaft and auxiliary shaft The specific coordination of rotation and steering creates a spiral rising composite flow field without dead angles. Furthermore, the shear frame 21 located at the bottom of the drive frame 10 and its bottom shear blades rotate with the shaft system to perform secondary fine shearing on the sludge rising to the top. Combined with the variable pitch design of the propeller blades 13 and the auger 14, namely the small pitch at the bottom to provide large torque and the large pitch at the top to adapt to rapid conveying, as well as the optimized setting of the blade inclination angle from 25 degrees to 35 degrees, the device can achieve continuous tumbling, efficient mixing and deep crushing of high-viscosity sludge through the internal linkage of the mechanical structure without the need for an additional power source. This completely solves the problems of laminar flow boundary and mixing dead zone that are easy to generate in traditional mixing equipment, and greatly improves the uniformity and processing efficiency of sludge modification. Example 3

[0031] Specifically, a guide frame 22 is fixedly mounted on the top of the processing box 1 via a fixing bracket, and an auxiliary material conveying pipe 23 is fixedly mounted on one side of the guide frame 22. An auxiliary material conveying chamber 24 is provided inside the main stirring shaft 11. Several auxiliary material conveying holes 27 are also provided on the surface of the main stirring shaft 11 and inside the guide frame 22. The interior of the auxiliary material conveying holes 27 is connected to the interior of the auxiliary material conveying chamber 24. An auxiliary material diversion chamber 25 is also provided inside the rotating frame 18. Several auxiliary material diversion holes 26 are also provided on the surface of the main stirring shaft 11 and inside the rotating frame 18. The top ends of several auxiliary stirring shafts 12 are rotatably connected to the bottom of the rotating frame 18, and the interior of several auxiliary stirring shafts 12 is connected to the interior of the auxiliary material diversion chamber 25. Several auxiliary material injection holes 28 are provided on the surface of the main stirring shaft 11 and the surface of several auxiliary stirring shafts 12, and a high-pressure nozzle is provided inside each auxiliary material injection hole 28.

[0032] It should be noted that a trace amount of ozone or hydrogen peroxide is introduced into the feed rack 22 through the auxiliary material conveying pipe 23. After the strong oxidant such as ozone or hydrogen peroxide is introduced into the feed rack 22 through the auxiliary material conveying pipe 23, the agent first enters the hollow auxiliary material conveying chamber 24 inside the main stirring shaft 11. It is initially released into the upper space of the rotating inner tank 3 through the auxiliary material conveying hole 27 on the surface of the main stirring shaft 11, realizing the first stage of wide-area premixing. Subsequently, some of the agent continues to descend through the auxiliary material diversion hole 26 on the surface of the main stirring shaft 11 and enters the auxiliary material diversion chamber 25 in the rotating frame 18. It is further distributed to the hollow channels inside several rotating auxiliary stirring shafts 12. Finally, it is precisely sprayed into the sludge flow field in the form of a high-speed atomized jet through the high-pressure nozzles evenly distributed on the surfaces of the auxiliary stirring shafts 12 and the main stirring shaft 11. Core area; This design utilizes the axial flow of the main stirring shaft 11 and the planetary shearing and agitation of the auxiliary stirring shaft 12 to simultaneously inject the agent into the violently churning sludge clumps from both the central axial and multi-point radial dimensions. This not only completely solves the problems of uneven agent distribution, excessively high local concentrations, or delayed reactions that are easily caused by traditional external dosing methods, but also greatly increases the contact surface area and mass transfer efficiency between ozone / hydrogen peroxide and sludge organic matter by leveraging the coupling effect of microbubbles generated by high-pressure nozzles and mechanical shearing forces. This promotes the rapid generation and diffusion of free radicals, thereby achieving highly efficient cell wall disruption, immediate odor removal through oxidation, and deep inactivation of pathogens with extremely low agent dosage, significantly improving the overall efficiency and operational economy of sludge resource utilization treatment.

[0033] Specifically, a number of transmission gears 16 are fixedly installed at the bottom of the guide frame 22, and a drive gear 15 is rotatably installed on the surface of the main stirring shaft 11 and inside the rotating feed frame 5. The interior of the rotating feed frame 5 meshes with the tooth surfaces of the drive gears 15, and the tooth surfaces of the drive gears 15 mesh with the tooth surfaces of the transmission gears 16. Through the transmission action of the main stirring shaft 11 in conjunction with the drive gears 15 and the transmission gears 16, when the drive gears 15 rotate clockwise, they drive the transmission gears 16 to rotate counterclockwise, and then drive the rotating feed frame 5 to rotate in the same direction through the transmission gears 16. Therefore, as the main stirring shaft 11 rotates, the rotating feed frame 5 and the rotating inner liner 3 rotate in opposite directions.

[0034] It should be noted that, using the main stirring shaft 11 as the sole power source, the rotational power of the main stirring shaft 11 is converted into the reverse rotational motion of the rotating feed rack 5 and the rotating inner liner 3 through the meshing transmission chain of the drive gear 15 and the transmission gear 16. This reverse rotation design ensures that when the rotating feed rack 5 introduces sludge into the rotating inner liner 3, its rotation direction is opposite to the direction of the material tumbling flow field formed by the propeller blades 13 driven by the main stirring shaft 11 and the auxiliary stirring shaft 12 inside the inner liner. This instantly creates a strong shearing and impacting effect in the feed inlet area, effectively preventing high-viscosity sludge from being stirred up during feeding. Accumulation, bridging, or adhesion at the feed inlet ensures the continuity and uniformity of the feed. At the same time, the reverse relative motion between the rotating inner tank 3 and the internal stirring components significantly increases the relative velocity between the sludge particles and the microwave reflector and ultrasonic transducer, enhancing the three-dimensional turbulent mixing of the material in the cavity, eliminating the laminar boundary layer, and allowing the sludge to pass through the microwave heating zone and ultrasonic cavitation zone more quickly. This greatly improves the heat transfer efficiency and chemical reaction rate, ultimately achieving a simultaneous improvement in feed smoothness, mixing uniformity, and processing energy efficiency without the need for additional power equipment.

[0035] Specifically, this embodiment constructs a hollow shaft multi-stage diversion and reverse feeding shear structure. During the agent addition process, ozone or hydrogen peroxide is introduced into the guide frame 22 via the auxiliary material conveying pipe 23. After the agent undergoes a first-stage wide-area premixing through the auxiliary material conveying chamber 24 and auxiliary material conveying hole 27 inside the main stirring shaft 11, it continues to pass through the auxiliary material diversion hole 26 into the auxiliary material diversion chamber 25 inside the rotating frame 18. Finally, it is distributed to the interior of the auxiliary stirring shaft 12 and precisely injected into the core of the sludge flow field in the form of an atomized jet from the auxiliary material injection hole 28 through a high-pressure nozzle. This three-dimensional injection method, from the central axis to multiple radial points, utilizes the propulsion of the main stirring shaft 11 and the planetary stirring of the auxiliary stirring shaft 12, greatly increasing the contact surface area between the agent and the sludge and promoting rapid diffusion of free radicals. In terms of synergistic feeding and mixing, the main stirring shaft 11... The drive gear 15 on the surface meshes with the transmission gear 16 at the bottom of the guide frame 22, converting the rotational power of the main stirring shaft 11 into the opposite rotational motion of the rotating feed frame 5 and the rotating inner tank 3. This makes the feeding direction opposite to the direction of the internal spiral upward flow field, instantly forming a strong shearing and impacting effect at the feed inlet to prevent high-viscosity sludge from accumulating and clogging. At the same time, the opposite relative motion between the rotating inner tank 3 and the internal stirring components significantly increases the relative velocity between the sludge particles and the microwave and ultrasonic fields, enhances the degree of three-dimensional turbulent mixing, and eliminates the laminar boundary. This scheme achieves efficient cell wall breaking, immediate odor removal, and deep inactivation of pathogens in sludge with extremely low reagent consumption through the structural combination of precise internal injection of reagents and reverse shearing of feed and discharge. It also improves the smoothness of feeding, the uniformity of mixing, and the overall resource utilization efficiency. Example 4

[0036] Specifically, this embodiment discloses a working method for a sludge resource utilization treatment device for municipal engineering, including the following steps: Step 1: Start the external controller. First, inert gas is introduced into the interlayer between the fixed outer shell 2 and the rotating inner liner 3. The pressure sensor monitors in real time and activates the solenoid valve to maintain the pressure in the interlayer at a slightly positive pressure of 50-150 Pa, so as to create a protective environment that isolates oxygen, prevents deflagration, and has heat insulation function. Then, the microwave generator is turned on. The microwave energy is reflected multiple times by the regular octagonal wave-shaped reflective surface on the inner wall of the fixed outer shell 2, forming a uniformly distributed microwave field in the cavity. At the same time, the power supply of the high-frequency conductive slip ring assembly is turned on, so that the magnetostrictive transducer 9 embedded in the vertical groove on the outer wall of the rotating inner liner 3 enters the standby state and is ready to emit ultrasonic waves.

[0037] Step 2: Start the drive servo motor 8. The motor output shaft drives the main stirring shaft 11 to rotate counterclockwise when viewed from above. The drive gear 15 on the surface of the main stirring shaft 11 rotates accordingly and meshes with the transmission gear 16 fixed at the bottom of the guide frame 22. This drives the transmission gear 16 and the rotating feed frame 5 and the rotating inner liner 3 connected to it to rotate clockwise and counterclockwise. At this time, the high-viscosity sludge to be treated enters the rotating feed frame 5 through the fixed feed frame 6. Since the rotation direction of the feed frame is opposite to the direction of the material tumbling flow field that will be formed inside the rotating inner liner 3, the sludge is subjected to a strong shearing and impacting effect the moment it enters the rotating inner liner 3, which effectively prevents the accumulation, bridging or adhesion at the feed inlet and achieves continuous and uniform feeding.

[0038] Step 3: Driven by the counterclockwise rotation of the main stirring shaft 11, the right-handed propeller blades 13 fixed on its surface generate an upward axial thrust on the bottom sludge, lifting the sludge along the central axis to the upper middle region; simultaneously, the main stirring shaft 11 drives the internal gear ring 19 to rotate through the rotating frame 18, and the internal gear ring 19 meshes with the driven gear 20 at the top of the auxiliary stirring shaft 12, forcing several auxiliary stirring shafts 12 to rotate clockwise while revolving with the drive frame 10; the left-handed propeller blades fixed on the surface of the auxiliary stirring shaft 12... The auger 14 generates an auxiliary upward axial force during its rotation and uses centrifugal force to break up the agglomerated sludge clumps. The variable pitch propeller blade 13 works in conjunction with the auger 14 to provide high torque thrust at the bottom and adapt to rapid conveying at the top, forming a spiral upward composite flow field without dead angles throughout the cross-section of the rotating inner tank 3. When the sludge rises to below the drive frame 10, the shear frame 21, which rotates with the shaft, and its bottom shear blades perform secondary fine shearing and crushing of the sludge, further refining the sludge particles.

[0039] Step 4: As the rotating inner tank 3 continues to rotate, the sludge inside constantly changes its position relative to the fixed outer shell 2, dynamically traversing the microwave wave crests and troughs. Combined with the scattering effect of the wave-shaped reflective surface, it completely eliminates heating blind spots and local overheating, achieving uniform and efficient heat energy absorption. At the same time, the ultrasonic waves emitted by the magnetostrictive transducer 9, which is closely attached to the outer wall of the rotating inner tank 3, directly penetrate the inner tank wall and act on the rapidly churning sludge. The ultrasonic cavitation effect generates micro-jets and shock waves, which work synergistically with the microwave thermal effect to accelerate the cell wall disruption process of the sludge and improve the modification efficiency.

[0040] Step 5: During the vigorous tumbling of the sludge, a trace amount of ozone or hydrogen peroxide is introduced into the feed rack 22 through the auxiliary material conveying pipe 23. The agent first enters the auxiliary material conveying chamber 24 inside the main stirring shaft 11, and is initially released into the upper space through the auxiliary material conveying hole 27 for wide-area premixing. Some of the agent continues to descend, passes through the auxiliary material diversion hole 26, enters the auxiliary material diversion chamber 25 inside the rotating frame 18, and is distributed to the hollow channels of each auxiliary stirring shaft 12. Finally, the agent is precisely injected into the core of the sludge flow field from the central axis and multiple radial points in the form of a high-speed atomized jet through the auxiliary material injection hole 28 at the high-pressure nozzle on the surface of the main stirring shaft 11 and the auxiliary stirring shaft 12. The microbubbles generated by the high-pressure nozzle are coupled with mechanical shear force, which greatly increases the contact specific surface area between the oxidant and the organic matter in the sludge, promotes the rapid generation and diffusion of free radicals, and achieves immediate removal of sludge odor, deep inactivation of pathogens, and efficient conversion of organic matter.

[0041] Step Six: After being fully heated, ultrasonically crushed, mechanically sheared, and chemically oxidized, the resource-recovered sludge is continuously circulated and tumbled under the action of the screw thrust until it reaches the preset treatment standard. The controller issues a command to open the electromagnetic control valve located at the top of the discharge pipe 7 at the bottom of the rotating inner tank 3. Under the action of gravity and residual thrust, the treated sludge is discharged from the outside of the device through the discharge pipe 7, which is sealed by a silicon carbide mechanical seal assembly. After the discharge is completed, the electromagnetic control valve is closed, and the device continues to perform the cyclic operation of steps two to five above, realizing the continuous and automated resource-recovery treatment of municipal sludge.

[0042] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0043] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. A sludge resource utilization treatment device for municipal engineering, characterized in that, The device includes a processing box (1), a fixed outer shell (2) is fixedly installed inside the processing box (1), and a rotating inner liner (3) is rotatably installed inside the fixed outer shell (2); a rotating feed rack (5) is fixedly installed on the top of the rotating inner liner (3), a fixed feeding rack (6) is fixedly installed on the top of the processing box (1), and the inside of the fixed feeding rack (6) is rotatably connected to the outer circumferential surface of the rotating feed rack (5); a discharge pipe (7) is fixedly installed at the bottom inside the rotating inner liner (3), and the top end of the discharge pipe (7) is rotatably connected to the middle part of the bottom of the rotating inner liner (3); A drive servo motor (8) is fixedly mounted on the top of the processing box (1) by a fixing bracket, and a main stirring shaft (11) is fixedly mounted on the bottom end of the output shaft of the drive servo motor (8) by a coupling. The bottom end of the main stirring shaft (11) extends into the interior of the rotating inner liner (3). A drive frame (10) is fixedly mounted on the bottom of the rotating feed rack (5) by a connecting frame (17), and several auxiliary stirring shafts (12) are rotatably mounted inside the drive frame (10). One end of the main stirring shaft (11) passes through the interior of the drive frame (10), and the surface of the main stirring shaft (11) is rotatably connected to the interior of the drive frame (10). The surfaces of several auxiliary stirring shafts (12) are all fixedly provided with spiral augers (14), and the surfaces of the main stirring shaft (11) are fixedly provided with several propeller blades (13) from top to bottom; the drive frame (10) is rotatably provided with a rotating frame (18), and the interior of the rotating frame (18) is fixedly connected to the surface of the main stirring shaft (11); an internal gear ring (19) is fixedly provided at the bottom of the interior of the rotating frame (18), and driven gears (20) are fixedly provided at the top of several auxiliary stirring shafts (12), and the internal tooth surface of the internal gear ring (19) meshes with the tooth surface of several driven gears (20) for transmission.

2. The sludge resource utilization device for municipal engineering according to claim 1, characterized in that, The bottom of the inner wall of the fixed outer shell (2) is fixedly provided with a rotating support frame (4), and the bottom of the rotating inner liner (3) is provided with a number of balls, and the surface of the balls is rotatably connected to the top of the rotating support frame (4).

3. The sludge resource utilization device for municipal engineering according to claim 1, characterized in that, The inner wall of the fixed outer shell (2) is processed with a polygonal wave-shaped reflective surface, and an inert gas is introduced between the inside of the fixed outer shell (2) and the outside of the rotating inner liner (3) for micro-positive pressure protection.

4. The sludge resource utilization device for municipal engineering according to claim 1, characterized in that, Shearing frames (21) are fixedly provided on the surfaces of several auxiliary stirring shafts (12) and the surface of the main stirring shaft (11), and each shearing frame (21) is located at the bottom of the drive frame (10), and several shearing blades are fixedly provided at equal angles at the bottom of each shearing frame (21).

5. A sludge resource utilization treatment device for municipal engineering according to claim 1, characterized in that, The top of the processing box (1) is fixed with a guide frame (22) and an auxiliary material conveying pipe (23) is fixed on one side of the guide frame (22). The main stirring shaft (11) is provided with an auxiliary material conveying chamber (24). The surface of the main stirring shaft (11) and inside the guide frame (22) are also provided with several auxiliary material conveying holes (27). The interior of the several auxiliary material conveying holes (27) is connected to the interior of the auxiliary material conveying chamber (24).

6. A sludge resource utilization treatment device for municipal engineering according to claim 1, characterized in that, The rotating frame (18) is also provided with an auxiliary material distribution cavity (25), and the surface of the main stirring shaft (11) and inside the rotating frame (18) are provided with a number of auxiliary material distribution holes (26); the top ends of a number of auxiliary stirring shafts (12) are rotatably connected to the bottom of the rotating frame (18), and the interior of a number of auxiliary stirring shafts (12) is connected to the interior of the auxiliary material distribution cavity (25).

7. A sludge resource utilization treatment device for municipal engineering according to claim 1, characterized in that, The surface of the main stirring shaft (11) and the surface of several auxiliary stirring shafts (12) are provided with several auxiliary material injection holes (28), and each auxiliary material injection hole (28) is provided with a high-pressure nozzle inside.

8. A sludge resource utilization treatment device for municipal engineering according to claim 5, characterized in that, The bottom of the guide frame (22) is fixedly provided with several transmission gears (16), and the surface of the main stirring shaft (11) and the interior of the rotating feed frame (5) are provided with a drive gear (15). The interior of the rotating feed frame (5) meshes with the tooth surfaces of several drive gears (15) for transmission, and the tooth surfaces of the drive gears (15) mesh with the tooth surfaces of several transmission gears (16) for transmission.

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