High solids anaerobic digestion reactor

Abstract

The application relates to the technical field of anaerobic digestion equipment, and discloses a high-solid anaerobic digestion reactor, which comprises a main body structure, a driving structure and an agitation structure, the driving structure is fixedly arranged in the main body structure, the agitation structure is fixedly arranged on the driving structure, and the agitation structure is driven to rotate through the driving structure. The application has the beneficial effects that two-stage speed regulation is adopted to adapt to the whole process of anaerobic digestion, the working condition requirements from cold start to normal reaction are adapted, the stirring form and the rotating speed are double-regulated, the whole efficient mixing is realized, the stirring difficulty of viscous materials is solved, the inner and outer double layers are cooperatively heated, stirred and heat-conducted, the whole uniform heating is realized, and the thermal fault is completely eliminated; the mechanical structure is simple and has high linkage, the equipment development and operation energy consumption are reduced, the pipeline of the main body structure is flexibly configured, and different treatment scenes and process requirements are adapted.

Description

Technical Field

[0001] This invention relates to the field of anaerobic digestion equipment technology, specifically a high-solids-content anaerobic digestion reactor. Background Technology

[0002] High-solids-content anaerobic digestion technology, as a core means of resource recovery and volume reduction of organic solid waste, is widely used in the treatment of solid waste such as kitchen waste, municipal sludge, agricultural straw, and livestock manure. Compared with low-solids-content anaerobic treatment, it has significant advantages such as high material concentration, high reactor volume utilization, and low biogas slurry production, making it the mainstream development direction for solid waste anaerobic treatment. However, in practical engineering applications, existing high-solids-content anaerobic digestion equipment and processes still face many technical bottlenecks, as follows: First, high-solids anaerobic materials have high viscosity, and existing stirring structures are prone to insufficient stirring and uneven mixing. Second, the poor stirring effect of the materials can easily lead to crusting and caking in missed areas. Third, traditional heating methods have heating blind spots, which can easily form thermal breaks and result in uneven temperature distribution within the reactor. Fourth, most stirring systems start at a fixed speed and cannot be adjusted according to actual needs, especially during cold starts when the viscosity is high, which can easily cause overload and increase agitation wear. Summary of the Invention

[0003] The purpose of this invention is to provide a high-solids-content anaerobic digester to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-solids-content anaerobic digester, comprising a main structure, a driving structure, and a stirring structure. The driving structure is fixedly disposed within the main structure, and the stirring structure is fixedly disposed on the driving structure, and the stirring structure is driven to rotate by the driving structure. The main structure serves to support the load and enables effective heating of the input heat medium to prevent thermal breakage. The driving structure provides power output to drive the stirring structure to rotate for internal stirring. The driving structure can adjust the speed range to regulate the speed of the stirring structure, and the stirring structure can control the stirring mode.

[0005] Preferably, the main structure includes a main component and a central heating component; the central heating component is fixedly disposed within the main component and located in the middle.

[0006] Preferably, the main component includes a base, several tank units, several sealing caps, and a tank lid; the base is circular and has two pairs of legs on its lower wall, and a discharge pipe is installed on the lower wall of the base; each of the several tank units is composed of an H-shaped outer tube fixedly fitted into a concentric inner tube, and a crossbeam connects the outer tube and the inner tube; a heating chamber is formed between the inner tube and the outer tube; the several tank units can be stacked and spliced ​​sequentially by bolts and fixedly installed on the base; the inner tube of each tank unit is connected to the discharge pipe; the front and rear side walls of each of the several tank units have symmetrical first interfaces communicating with the heating chamber; the left and right side walls of each of the several tank units have symmetrical second interfaces communicating with the inner tube; the several sealing caps are detachably installed on the first and second interfaces respectively to cover and seal; and the tank lid is detachably snapped onto the top of the tank unit.

[0007] Preferably, the central heating assembly includes a heating cylinder, a reflux plate, and a pair of conveying ports; the heating cylinder is T-shaped, fixedly disposed in the middle of the base, and vertically disposed in the middle of several tank units; the reflux plate is fixedly disposed at the bottom of the heating cylinder, and the reflux plate can isolate the bottom space of the heating cylinder into two heating chambers; the heating chambers at the top of the reflux plate are interconnected; one end of each of the pair of conveying ports passes through the base, and the conveying ports are respectively connected to the heating chambers on both sides of the heating cylinder. Preferably, the drive structure includes a drive box, a drive assembly, and a control assembly; the drive box is fixedly disposed in the middle of the upper inner wall of the can lid, and the drive box is a box structure without a lower wall; the drive assembly is fixedly disposed inside the drive box, near the top; the control assembly is fixedly disposed on the front side wall inside the drive box, and the control assembly is located below the drive assembly.

[0008] Preferably, the drive assembly includes a drive base, a base, a first hydraulic cylinder body, a motor, a drive shaft, a pair of first gears, and a pair of second gears; one end of the drive base is fixedly disposed on the front side wall inside the drive housing, near the top center; a first bearing is embedded in the center of the other end of the drive base; lifting ports are symmetrically arranged on the left and right side walls of the other end of the drive base; the base has a Z-shaped structure; the middle part of the base moves through the lifting ports; one end of the base is located above the other end of the drive base; the other end of the base is located behind and below the drive base; one end of the first hydraulic cylinder body is fixedly disposed through the drive base; and the telescopic end of the first hydraulic cylinder body is connected to one end of the base; the first hydraulic cylinder body can... The motor is fixedly mounted on the lower wall of the other end of the base. One end of the drive shaft is fixedly inserted into the middle of the first bearing, and the drive shaft is located in front of the motor. The other end of the drive shaft passes through the bottom of the drive box. A pair of first gears are fixedly mounted on the motor drive end and the drive shaft, respectively. The first gears are staggered and corresponding in the vertical direction. A pair of second gears have a smaller diameter than the first gear. A pair of second gears are fixedly mounted on the motor drive end and the drive shaft, respectively. The second gears are staggered and corresponding below and above the first gear. The first gear and the second gear on the motor drive end mesh with the second gear and the first gear on the drive shaft, respectively.

[0009] Preferably, the control assembly includes a control seat, a shaft tube, a sleeve, an adapter ring, a second hydraulic cylinder body, an electric push rod, a locking frame, a first driven gear, and a second driven gear. One end of the control seat is fixedly disposed on the front side wall inside the drive housing and located below the drive seat. A second bearing corresponding to the first bearing is disposed in the middle of the control seat. A sliding groove is provided through the lower wall of the other end of the control seat. One end of the shaft tube is fixedly fitted into the middle of the second bearing, and the shaft tube is fitted onto the outside of the drive shaft. Force-applying ribs are symmetrically arranged on the side wall of the shaft tube. The sleeve is movably fitted onto the shaft tube, and a force-applying groove that fits with the force-applying ribs is provided on the inner side wall of the sleeve. The sleeve can move along the shaft tube. The system is designed for lifting and moving. One end of the adapter ring is fixedly fitted onto the top of the sleeve. One end of the second hydraulic cylinder body is fixedly inserted through the control seat, and the telescopic end of the second hydraulic cylinder body is connected to the other end of the adapter ring. The electric push rod is fixedly installed in the middle of the upper wall of the other end of the control seat. The middle part of the lock frame is movably inserted into the sliding groove, and one end of the lock frame is concave, corresponding to the shaft tube. The other end of the lock frame is L-shaped and connected to the telescopic end of the electric push rod. The first driven gear is fixedly fitted onto the sleeve, and the second driven gear is fixedly fitted onto the sleeve and located below the first driven gear. The diameter of the second driven gear is smaller than that of the first driven gear.

[0010] Preferably, the agitation structure includes an agitator frame, a pair of agitator shafts, several agitator plates, a pair of third driven gears, a pair of fourth driven gears, and a pair of locking shaft units; the agitator frame is fixedly mounted in the middle on the other end of the drive shaft, and the agitator frame is located above the heating cylinder; a third bearing is embedded in the middle of both ends of the agitator frame, and an L-shaped locking groove is opened near the third bearing; a locking hole penetrating the bottom of the third bearing is opened on the side wall of the locking groove; one end of each pair of agitator shafts is fixedly fixed through the middle of the third bearing, and the bottom end of the agitator shafts penetrates several tanks. The unit comprises several agitator plates equidistantly arranged on the bottom end of the agitator shaft, a pair of third driven gears identical to the first driven gear, a pair of third driven gears fixedly mounted on the top end of the agitator shaft, and the third driven gears meshing opposite each other on both sides of the second driven gear, a pair of fourth driven gears fixedly mounted on the top end of the agitator shaft and located above the third driven gears, the pair of fourth driven gears capable of meshing with the first driven gear, and a pair of locking shaft units movably disposed within locking grooves and symmetrical to each other.

[0011] Preferably, the locking shaft unit includes a locking seat, a locking rod, a spring, and a locking claw; the locking seat is movably fitted into the locking groove, and one end of the locking seat is a trapezoidal structure with an inclined wall; one end of the locking rod is fixedly set on the other end of the locking seat, and the locking rod is movably inserted into the lock hole; the locking rod can be pressed against the agitator shaft; the spring is movably fitted onto the locking rod, and the spring is located between the other end of the locking seat and the side wall of the locking groove; the locking claw is L-shaped, one end of the locking claw is fixedly set on the side wall of the bottom end of the sleeve, the lower wall of the other end of the locking claw is an inclined wall, and the other end of the locking claw can be inserted into the locking groove.

[0012] Preferably, the locking claw can descend through the sleeve, attach to one end of the locking seat, and push the locking seat after being pressed down.

[0013] The high-solids-content anaerobic digester proposed in this invention has the following advantages: 1. The motor output speed is adjusted initially through a simple mechanical structure, allowing for flexible switching of speed according to the process requirements of different stages of anaerobic digestion: low-speed transmission is used during the cold start stage to avoid excessive local shearing and damage to the microbial community caused by high-speed stirring of viscous materials, thus ensuring the initial acclimatization and adaptation of the microbial community; after the material is heated to the suitable reaction temperature, high-speed transmission is switched to improve stirring efficiency and enhance the contact between microorganisms and substrates; no complex electrical control modifications are required throughout the process, and speed adjustment is achieved solely through the mechanical structure, resulting in strong adaptability and stable operation.

[0014] 2. The drive component and the control component work together to achieve both overall speed adjustment of the stirring structure and individual control of the speed of the two symmetrically set stirring shafts. Differentiated stirring can be achieved for viscous materials under different conditions in the reactor, avoiding local material accumulation and stratification. The stirring shaft uses a composite stirring method that revolves around the heating cylinder and rotates on its own axis, which greatly expands the stirring coverage area and creates a strong shearing and dispersing effect on viscous materials, achieving uniform mixing of materials throughout the reactor and solving the problems of single stirring method and insufficient mixing in traditional stirring methods. The shaft tube can be unlocked by adjusting the control components and the agitator shaft can be locked by locking the shaft unit, quickly switching to single revolution agitation. It is suitable for materials with different solid contents and viscosity. The agitation mode is flexible and adjustable, and there is no need to replace the agitator components, reducing operation and maintenance costs.

[0015] 3. The main structure adopts a design with a heating chamber between the outer and inner tubes and a central heating component. The outer side is heated by injecting a heat medium into the heating chamber to achieve full-area heating and insulation of the tank wall. The inner side is heated by injecting a heat medium into the central area of ​​the material through the heating cylinder for core heating, forming full-area heating coverage from the outside to the inside. At the same time, the revolution and rotation of the stirring structure drive the material in the high-temperature area to diffuse rapidly to the low-temperature area. The low-temperature material is continuously transported to the heating area to complete heat exchange, realizing synchronous heat conduction of heating and stirring, greatly improving heat transfer efficiency, completely eliminating the thermal discontinuity phenomenon of "high temperature on the wall and low temperature in the center", ensuring uniform and stable temperature in the reactor, and matching the temperature-sensitive requirements of anaerobic microorganisms (the heating chamber of the tank unit and the heating chamber of the heating cylinder can also be injected with a medium with a temperature difference according to actual needs to further improve temperature uniformity).

[0016] 4. All speed regulation, stirring mode switching, and heating control are achieved through simple mechanical structure linkage, without the need for complex electrical control systems and multiple power source drives: the mechanical linkage between the drive component, control component, and locking shaft unit allows a single power source to complete multiple functions such as speed adjustment and stirring mode switching; the double-layer heating structure relies on the natural circulation of the heat medium and forced heat conduction by stirring, eliminating the need for additional heat circulation power equipment, greatly simplifying the equipment structure, reducing R&D, manufacturing, and subsequent maintenance costs, while also reducing equipment operating energy consumption and improving economic efficiency.

[0017] 5. Addressing the issue of high-solids-content materials easily forming a crust, it achieves dual protection through mechanical stirring to break up the crust and uniform temperature to prevent crust formation: The combined stirring of the agitator shaft's revolution and rotation creates continuous impact and shearing on the reactor liquid surface and areas prone to crust formation, effectively breaking up initial crust formation and preventing the hard crust from thickening. The uniform heating effect throughout the entire area avoids the problem of scum accumulation and crusting caused by localized low temperatures, thus reducing crust formation at its source. The combination of these two methods completely solves the problem of crusting blocking gas-liquid mass transfer and causing reaction stagnation in traditional equipment, ensuring continuous and stable operation of the reactor without the need for frequent shutdowns for cleaning.

[0018] 6. The main structure can be freely configured with the number, location and specifications of input and output pipes according to actual processing needs: it can flexibly configure material feed pipes, heat medium input pipes, biogas output pipes and biogas residue discharge pipes for different materials such as kitchen waste, sludge and livestock manure; it can also adjust the flow diameter of the pipes according to the processing scale of engineering applications, adapting to different scenarios such as laboratory pilot, pilot and large-scale industrial production, with strong structural flexibility and wide applicability.

[0019] 7. The main structure's tank units adopt a modular design with bolted stacking, which can be flexibly configured with pipelines. The number of tank units can be increased or decreased according to actual processing needs, and the reactor volume can be freely adjusted to achieve flexible expansion of processing scale without redesigning the entire equipment. This significantly reduces the cost of equipment upgrades and capacity expansion, and adapts to the capacity requirements of different projects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the overall assembly structure of the present invention; Figure 2 This is a schematic diagram showing the appearance and structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the present invention broken down; Figure 4 This is an enlarged schematic diagram of the drive structure assembly of the present invention; Figure 5 This is an enlarged schematic diagram of the agitation structure assembly of the present invention; Figure 6 This is a schematic diagram showing the assembly of the driving structure and the stirring structure of the present invention; Figure 7 for Figure 3 A magnified schematic diagram of the structure at point A in the diagram; Figure 8 for Figure 4 A magnified schematic diagram of the structure at point B in the diagram; Figure 9 for Figure 5 A magnified schematic diagram of the structure at point C.

[0021] In the diagram: 1. Main structure; 11. Main component; 111. Base; 112. Tank unit; 1121. Outer pipe; 1122. Inner pipe; 113. Sealing cover; 114. Tank cover; 12. Central heating component; 121. Heating cylinder; 122. Return plate; 123. Conveying interface; 2. Drive structure; 21. Drive box; 22. Drive component; 220. Drive base; 221. Machine base; 222. First hydraulic cylinder body; 223. Motor; 224. Drive shaft; 225. First gear; 226. Second gear; 23. Control component; 230. Control base; 231. 1. Shaft tube; 232. Sleeve; 233. Adapter ring; 234. Second hydraulic cylinder body; 235. Electric push rod; 236. Lock frame; 237. First driven gear; 238. Second driven gear; 3. Agitation structure; 31. Agitation frame; 32. Agitation shaft; 33. Agitation plate; 34. Third driven gear; 35. Fourth driven gear; 36. Lock shaft unit; 361. Lock seat; 362. Lock rod; 363. Spring; 364. Lock claw; 41. First bearing; 42. Second bearing; 43. Third bearing; 5. Sliding groove; 6. Lock groove; 7. First interface; 8. Second interface. Detailed Implementation

[0022] 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.

[0023] For example, 1- Figure 9 This invention provides a technical solution: a high-solids-content anaerobic digestion reactor, comprising a main structure 1, a driving structure 2, and a stirring structure 3. The driving structure 2 is fixedly disposed within the main structure 1, and the stirring structure 3 is fixedly disposed on the driving structure 2, and the stirring structure 3 is driven to rotate by the driving structure 2. The main structure 1 is used for bearing and can realize the effective heating of the input heat medium to prevent thermal breakage. The driving structure 2 is used for power output to drive the stirring structure 3 to rotate for internal stirring. The driving structure 2 can adjust the speed range, thereby adjusting the speed of the stirring structure 3. The stirring structure 3 can control the stirring mode.

[0024] As shown in Figure 3, as a preferred embodiment, the main structure 1 includes a main component 11 and a central heating component 12; the central heating component 12 is fixedly disposed within the main component 11 and located in the middle.

[0025] As shown in Figure 3, in a preferred embodiment, the main component 11 includes a base 111, several tank units 112, several sealing caps 113, and a tank cover 114. The base 111 is circular and has two pairs of legs on its lower wall. A discharge pipe is installed on the lower wall of the base 111. Each of the several tank units 112 consists of an H-shaped outer tube 1121 fixedly fitted onto a concentric inner tube 1122. A crossbeam connects the outer tube 1122 to the inner tube 1122, and a heating chamber is formed between the inner tube 1122 and the outer tube 1121. 2 can be stacked and spliced ​​sequentially by bolts and fixedly set on the base 111. The inner tube 1122 of the tank unit 112 is connected to the discharge pipe. The front and rear side walls of several tank units 112 are symmetrically provided with first interfaces 7 that are connected to the heating chamber. The left and right side walls of several tank units 112 are symmetrically provided with second interfaces 8 that are connected to the inner tube 1122. Several sealing caps 113 are detachably installed on the first interface 7 and the second interface 8 respectively to cover and seal. The tank cover 114 is detachably snapped onto the top of the tank unit 112.

[0026] More specifically, the main component 11 is used for foundation support and material containment, as well as heat medium transportation. The various components work together to achieve material loading, heating chamber formation, pipeline on / off control, and modular expansion of the equipment. The base 111 provides a stable supporting foundation for the overall structure. The discharge pipe on the lower wall of the base 111 is connected to the inner pipe 1122 of each tank unit 112, serving as the core discharge channel for digested materials within the reactor, achieving centralized output of products such as biogas residue and biogas slurry. The tank unit 112 is the core material containment cavity of the reactor, providing space for the flow of the heat medium; through the outer pipe 112... The independent heating chamber formed by the inner tube 1122, together with the first interface 7, realizes the circulation of the heat medium and the construction of the medium channel for heating the outside of the reactor. The second interface 8 provides a basis for the flexible configuration of pipelines for materials, biogas, etc. At the same time, the bolt stacking splicing design of the tank unit 112 realizes the modular and flexible expansion of the reactor volume, adapting to different material processing scale requirements. The overall structure is compact and easy to disassemble and assemble, taking into account the airtightness, functionality and adaptability of the equipment, and providing a stable basic structural support for the reactor's heating, material processing and process expansion.

[0027] As shown in Figure 3, as a preferred embodiment, the central heating assembly 12 includes a heating cylinder 121, a reflux plate 122, and a pair of conveying ports 123. The heating cylinder 121 is T-shaped and is fixedly installed in the middle of the base 111. The heating cylinder 121 is vertically installed in the middle of several tank units 112. The reflux plate 122 is fixedly installed at the bottom of the heating cylinder 121 and can isolate the bottom space of the heating cylinder 121 into two heating chambers. The heating chambers at the top of the reflux plate 122 are interconnected. One end of each pair of conveying ports 123 passes through the base 111 and is connected to the heating chambers on both sides of the heating cylinder 121. More specifically, the central heating component 12 is used for core heating of the central area of ​​the material in the reactor, forming a double-layer heating combination with the outer heating chamber of the main component 11 to achieve full-area heating of the material in the reactor. Through the coordinated design of the T-shaped heating cylinder 121 and the reflux plate 122, the heat medium is realized to achieve closed-loop circulation within the heating cylinder 121, so that the cylinder wall of the heating cylinder 121 continuously and stably releases heat, laying the foundation for the subsequent stirring structure to drive the mixing and heat conduction of the material, completely eliminating the occurrence of thermal break-off phenomenon, and ensuring the uniformity of the temperature field in the reactor.

[0028] As shown in 4, as a preferred embodiment, the drive structure 2 includes a drive box 21, a drive assembly 22, and a control assembly 23. The drive box 21 is fixedly disposed in the middle of the upper inner wall of the can cover 114, and the drive box 21 is a box structure without a lower wall. The drive assembly 22 is fixedly disposed inside the drive box 21, near the top. The control assembly 23 is fixedly disposed on the front inner wall of the drive box 21, and the control assembly 23 is located below the drive assembly 22.

[0029] More specifically, the drive structure 2 is the core of the reactor's power output and control, providing flexibly adjustable rotational power. The drive box 21 serves as the mounting carrier and protective structure for the drive component 22 and the control component 23, providing a stable assembly foundation for both types of components. The drive component 22 is used for the core power output of the drive structure 2. It integrates a power source and a speed adjustment structure, enabling basic power output and completing the first speed adjustment at the output end of the motor 223, providing different levels of basic rotational power for the stirring structure 3. The control component 23 is used for power transmission and secondary control, receiving the power output from the drive component 22 and achieving secondary control of the power transmission path and speed through its own structural adjustment. The whole system achieves integrated operation of power output, multi-level speed adjustment, and stirring mode control, providing a flexibly adjustable rotational power foundation for the stirring structure 3. The overall structure is compact and rationally laid out, meeting the core power requirements for reactor stirring speed adjustment and mode switching, while also improving the assembly convenience and operational stability of the drive structure 2 through modular structural design.

[0030] As shown in Figure 4, in a preferred embodiment, the drive assembly 22 includes a drive base 220, a base 221, a first hydraulic cylinder body 222, a motor 223, a drive shaft 224, a pair of first gears 225, and a pair of second gears 226. One end of the drive base 220 is fixedly disposed on the front side wall inside the drive housing 21, near the top center. A first bearing 41 is embedded in the center of the other end of the drive base 220. Lifting ports are symmetrically arranged on the left and right side walls of the other end of the drive base 220. The base 221 has a Z-shaped structure, with the middle part of the base 221 movably passing through the lifting ports. One end of the base 221 is located above the other end of the drive base 220, and the other end of the base 221 is located behind and below the drive base 220. One end of the first hydraulic cylinder body 222 is fixedly disposed through the drive base 220, and the telescopic end of the first hydraulic cylinder body 222 is connected to one end of the base 221. The motor 223 is fixedly mounted on the lower wall of the other end of the base 221. One end of the drive shaft 224 is fixedly inserted into the middle of the first bearing 41, and the drive shaft 224 is located in front of the motor 223. The other end of the drive shaft 224 passes through the bottom of the drive box 21. A pair of first gears 225 are fixedly mounted on the drive end of the motor 223 and the drive shaft 224, respectively. The first gears 225 are staggered and corresponding in the vertical direction. A pair of second gears 226 have a smaller diameter than the first gears 225. The pair of second gears 226 are fixedly mounted on the drive end of the motor 223 and the drive shaft 224, respectively. The second gears 226 are staggered and corresponding below and above the first gears 225, respectively. The first gears 225 and the second gears 226 on the drive end of the motor 223 mesh with the second gears 226 and the first gears 225 on the drive shaft 224, respectively.

[0031] More specifically, the drive assembly 22 is used for the core power output and primary speed regulation of the drive structure 2. Through the coordinated operation of mechanical transmission and hydraulic lifting, it achieves stable power output and flexible adjustment of output speed, providing the basic rotational power for the agitation structure 3 to adapt to different working conditions of anaerobic digestion. The drive assembly 22 achieves integrated operation of power output and primary speed regulation through the integrated design of Z-shaped base 221, hydraulic lifting structure and cross meshing transmission. The overall structure adopts a pure mechanical cooperation and hydraulic control form, without complex electronic control components, which has strong operational stability and convenient maintenance. At the same time, the compact layout design makes full use of the internal space of the drive box 21, and reserves reasonable space for the assembly and operation of the subsequent control assembly 23. It not only achieves stable power output, but also completes precise primary speed regulation, providing a flexible and controllable basic power guarantee for the diversified stirring operation of the agitation structure 3.

[0032] As shown in Figure 4, in a preferred embodiment, the control assembly 23 includes a control seat 230, a shaft tube 231, a sleeve 232, a transition ring 233, a second hydraulic cylinder body 234, an electric push rod 235, a locking frame 236, a first driven gear 237, and a second driven gear 238. One end of the control seat 230 is fixedly installed on the front side wall inside the drive box 21 and located below the drive seat 220. A second bearing 42 corresponding to the first bearing 41 is provided in the middle of the control seat 230. A sliding groove 5 is provided through the lower wall of the other end of the control seat 230. One end of the shaft tube 231 is fixedly fitted into the middle of the second bearing 42, and the shaft tube 231 is fitted onto the outside of the drive shaft 224. Force-applying ribs are symmetrically arranged on the side wall of the shaft tube 231. The sleeve 232 is movably fitted onto the shaft tube 231, and a force-applying groove that fits with the force-applying rib is provided on the inner side wall of the sleeve 232. 32 can move up and down along the shaft tube 231. One end of the adapter ring 233 is fixedly fitted onto the top of the sleeve 232. One end of the second hydraulic cylinder body 234 is fixedly inserted through the control seat 230, and the telescopic end of the second hydraulic cylinder body 234 is connected to the other end of the adapter ring 233. The electric push rod 235 is fixedly set in the middle of the upper wall of the other end of the control seat 230. The middle part of the lock frame 236 is movably inserted into the sliding groove 5, and one end of the lock frame 236 is concave and corresponds to the shaft tube 231. The other end of the lock frame 236 is L-shaped and is connected to the telescopic end of the electric push rod 235. The first driven gear 237 is fixedly fitted onto the sleeve 232. The second driven gear 238 is fixedly fitted onto the sleeve 232 and is located below the first driven gear 237. The diameter of the second driven gear 238 is smaller than that of the first driven gear 237.

[0033] More specifically, the control component 23 is used for power transmission control and secondary speed regulation of the drive structure 2. It receives the power output from the drive component 22 and, through the coordinated action of hydraulic lifting, mechanical engagement, and gear engagement, achieves basic control of power transmission on / off, secondary speed regulation of the agitation structure 3, and switching of agitation modes. The control component 23, through the sliding fit between the shaft tube 231 and the sleeve 232, the lifting of the sleeve 232 driven by the second hydraulic cylinder body 234, and the locking structure of the locking frame 236 controlled by the electric push rod 235, realizes… The system integrates the on / off switching of power transmission, secondary speed regulation, and stirring mode control. The main body 234 of the second hydraulic cylinder drives the sleeve 232 to rise and fall. With the cooperation of the first driven gear 237 and the second driven gear 238 of different diameters, it can precisely mesh and switch with the stirring structure 3 to realize the secondary speed regulation of the stirring structure 3. The cooperation between the electric push rod 235 and the locking frame 236 can realize the rapid locking and unlocking of the shaft tube 231, providing core structural support for the stirring structure 3 to switch between "revolution, rotation" and "single revolution" stirring modes.

[0034] As shown in Figure 5, in a preferred embodiment, the agitation structure 3 includes an agitator 31, a pair of agitator shafts 32, several agitator plates 33, a pair of third driven gears 34, a pair of fourth driven gears 35, and a pair of locking shaft units 36. The agitator 31 is fixedly mounted on the other end of the drive shaft 224 at its center, and the agitator 31 is located above the heating cylinder 121. Third bearings 43 are embedded in the center of both ends of the agitator 31, and L-shaped locking grooves are provided near the third bearings 43. Locking holes penetrating the bottom of the third bearings 43 are provided on the sidewalls of the locking grooves. One end of each pair of agitator shafts 32 is fixedly fixed through the center of the third bearings 43, and the bottom ends of the agitator shafts 32 are... A plurality of agitator plates 33 are equidistantly arranged on the bottom end of agitator shaft 32, passing through several tank units 112. A pair of third driven gears 34 are identical to the first driven gears 237. The pair of third driven gears 34 are fixedly mounted on the top end of agitator shaft 32, and the third driven gears 34 are respectively located on both sides of the second driven gear 238 and mesh with each other. A pair of fourth driven gears 35 are fixedly arranged on the top end of agitator shaft 32 and located above the third driven gears 34. The pair of fourth driven gears 35 can mesh with the first driven gears 237. A pair of locking shaft units 36 are movably arranged in locking grooves 6 and are symmetrical to each other.

[0035] More specifically, the stirring structure 3 is used for material stirring in the reactor, receiving power from the drive structure 2 to switch between revolution, rotation, and single revolution stirring modes, as well as secondary adjustment of the stirring speed, to achieve uniform mixing of viscous materials throughout the reactor. Through the design of the stirring frame 31, the double stirring shafts 32, and the third driven gear 34 and the fourth driven gear 35, the stirring structure 3 achieves secondary fine adjustment of the stirring speed and revolution stirring around the axis of the heating cylinder 121. The double stirring shafts 32, together with the equidistant stirring plates 33, greatly expand the stirring coverage area, effectively shearing and dispersing high solids content viscous materials, and avoiding local accumulation and stratification of materials. The cooperation between the L-shaped locking groove and the locking shaft unit 36 ​​provides a structural basis for switching stirring modes, enabling flexible switching between revolution and rotation of the stirring shafts 32 and single revolution stirring. The compound stirring can form a stronger material disturbance effect, effectively breaking up material crusts, while single revolution can adapt to the light stirring requirements of low solids content and low viscosity materials.

[0036] As shown in Figure 5, in a preferred embodiment, the locking shaft unit 36 ​​includes a locking seat 361, a locking rod 362, a spring 363, and a locking claw 364. The locking seat 361 is movably fitted into the locking groove 6, and one end of the locking seat 361 has a trapezoidal structure with an inclined wall. One end of the locking rod 362 is fixedly mounted on the other end of the locking seat 361, and the locking rod 362 is movably inserted into the lock hole. The locking rod 362 can press against the agitator shaft 32, and the spring 363 is flexibly... The movable part is mounted on the locking rod 362, and the spring 363 is located between the other end of the lock seat 361 and the side wall of the lock groove 6. The locking claw 364 is L-shaped, with one end of the locking claw 364 fixedly mounted on the bottom side wall of the sleeve 232. The lower wall of the other end of the locking claw 364 is an inclined wall, and the other end of the locking claw 364 can be inserted into the lock groove 6. The locking claw 364 can descend through the sleeve 232 to contact one end of the lock seat 361 and push the lock seat 361 after pressing down.

[0037] More specifically, the locking shaft unit 36 ​​is used to switch the stirring mode of the stirring structure 3. Through the coordinated action of mechanical engagement, elastic reset, and inclined plane contact transmission, it achieves precise locking and unlocking of the stirring shaft 32's rotation state, thereby completing the switching of the reactor's stirring mode. When the spring 363 is in its natural extension and contraction state, it provides elastic reset force to the locking seat 361. The locking shaft unit 36, through its integrated structural design of inclined plane contact transmission, elastic reset, and mechanical clamping, achieves precise and rapid locking and unlocking of the stirring shaft 32's rotation state, providing a reliable mechanical control basis for switching the stirring mode. The adaptive inclined surface design of the lock seat 361 and the lock claw 364 enables the vertical lifting power to be efficiently converted into horizontal locking power, with smooth transmission and stable squeezing force, ensuring the effectiveness of the locking action. The locking shaft unit 36 ​​moves up and down with the sleeve 232 to trigger the action, and works in conjunction with the speed adjustment and gear meshing of the control component 23, so that the stirring speed adjustment and stirring mode switching can be completed synchronously and in a coordinated manner. The overall structure is compact and the action response is precise. The stirring mode can be flexibly switched according to the viscosity of the material and the shelling situation, effectively solving the problems of insufficient stirring and easy shelling of high solid content materials.

[0038] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0039] This high-solids-content anaerobic digestion reactor is composed of three core parts: main structure 1, drive structure 2, and stirring structure 3. Each component works together and operates in a coordinated manner to achieve double-layer uniform heating of high-solids-content anaerobic materials, multi-speed stirring, and dual-mode stirring switching, accurately solving industry pain points such as high-solids-content materials being viscous, prone to crusting, uneven heating, and insufficient stirring. The main structure 1 serves as the basic carrier of the reactor. Through the cooperation of the main component 11 and the central heating component 12, a double-layer heating structure is formed with external circumferential heating and central axial heating. At the same time, it completes the loading of materials, pipeline opening and closing, and product discharge, providing a stable temperature environment and material holding space for anaerobic digestion reaction. The base 111 is supported by two pairs of legs on its lower wall. The discharge pipe on its lower wall is connected to the inner pipe 1122 of each tank unit 112, serving as the core discharge channel for the digested material. The tank unit 112 is composed of an outer pipe 1121 fixedly fitted with a concentric inner pipe 1122. The two are fixed together by a crossbeam to form a heating chamber. Multiple tank units 112 can be stacked and spliced ​​by bolts to adapt to different processing scales. The first interface 7 on the front and rear side walls of the tank unit 112 is connected to the heating chamber, providing an input or return channel for the external heating medium. The second interface 8 on the left and right side walls is connected to the inner pipe 1122 and can be flexibly configured as a material feeding interface or a biogas collection interface. The sealing cover 113 can be detachably sealed to the unused first and second interfaces to ensure the airtightness of the cavity. The tank cover 114 can be detachably fastened to the top of the tank unit 112 to achieve a top seal of the reactor and at the same time provide a fixed foundation for the drive box 21 of the drive structure 2. The heating cylinder 12 of the central heating component 12 has a T-shaped structure, is vertically fixed in the middle of the base 111 and located in the center of the tank unit 112. The reflux plate 122 fixed at its bottom isolates the internal space into two independent heating chambers, and the heating chambers at the top of the reflux plate 122 are interconnected. A pair of conveying ports 123 pass through the base 111 and are connected to the two independent heating chambers respectively. One of the conveying ports 123 inputs a high-temperature heat medium, which flows upward along the heating cylinder 121, flows back to the other heating chamber through the top connecting area, and then flows back through the other conveying port 123, realizing a closed circulation of the heat medium in the heating cylinder 121, so that the cylinder wall of the heating cylinder 121 continuously releases heat.

[0040] The double-layer heating system is configured as follows: The heating chamber of the main component 11 is supplied with a heat medium through the first interface 7 to achieve circumferential heating of the material inside the tank unit 112; the heating cylinder 121 of the central heating component 12 achieves axial heating of the material in the central area of ​​the tank through heat medium circulation. The two form a double-layer heating system that covers the entire reactor area from the outside to the inside, with no heating blind spots. The power output and multi-stage control of the drive structure 2 provide flexibly adjustable power for stirring; at the same time, it provides a structural basis for switching stirring modes. The overall power is output from the motor 223 and transmitted to the stirring structure 3 after multi-stage control. The drive box 21 provides installation and protection space for the drive assembly 22 and the control assembly 23. At the same time, the design without a lower wall ensures that the power output end (drive shaft 224) can be smoothly connected to the stirring structure 3. The drive assembly 22 realizes the basic power output and first-level speed regulation, providing switchable high and low speed basic power for the overall stirring. The drive base 220 is fixed to the top of the front side wall inside the drive box 21. The first bearing 41 in the middle of the base provides rotational support for the drive shaft 224, ensuring the coaxiality and stability of the drive shaft 224. The lifting ports on both sides of the drive base 220 provide lifting guides for the machine base 221. The Z-shaped machine base 221 moves through the lifting port in the middle. One end of the machine base 221 is connected to the telescopic end of the first hydraulic cylinder body 222, and the lower wall of the other end is fixed with the motor 223. The telescopic extension of the first hydraulic cylinder body 222 can drive the machine base 221 to rise and fall along the lifting port, and simultaneously drive the motor 223 to complete the position adjustment. First-level speed regulation logic: The main body 222 of the first hydraulic cylinder drives the machine base 221 and the motor 223 to rise and fall, changing the relative position of the motor drive end and the drive shaft 224, realizing the meshing depth of gear pairs of different diameters and the switching of transmission ratio, thereby completing the high and low speed switching of the drive shaft 224 to adapt to the working conditions of low speed for cold start and high speed for normal reaction in anaerobic digestion. Secondary speed regulation logic: The lifting of the sleeve 232 drives the first driven gear, the second driven gear and the different gears of the stirring structure 3 to mesh. By utilizing the transmission ratio difference of gears with different diameters, the stirring speed range is further refined on the basis of the primary speed regulation of the drive component 22, so as to adapt to more diverse material viscosity requirements.

[0041] The basic mixing frame and power supply are as follows: The middle part of the stirring frame 31 is fixed to the lower end of the drive shaft 224. It revolves around the axis of the heating cylinder 121 as the drive shaft 224 rotates, providing support for the entire stirring structure 3. The middle of both ends of the stirring frame 31 is fitted with a third bearing 43, which provides rotational support for a pair of stirring shafts 32 and ensures the rotational stability of the stirring shafts 32. One end of the stirring shaft 32 passes through the third bearing 43, and the top end is fixed with a third driven gear 3 and a fourth driven gear 35. The other end passes through the tank unit 112 to the material area. Stirring plates 33 are equidistantly arranged at the bottom of the shaft. The stirring plates 33 act directly on the material as the stirring shaft 32 moves, completing the stirring and dispersion. The third driven gear 34 meshes with the second driven gear 238 of the control component 23, or the fourth driven gear 35 meshes with the first driven gear 237 of the control component 23. The meshing switching is achieved as the sleeve 232 rises and falls, completing the power transmission for secondary speed regulation. When the shaft tube 231 of the control component 23 is unlocked and rotated, the power is transmitted to the sleeve 232 through the force-applying rib and force-applying groove, and then to the stirring shaft 32 through the first driven gear 237 and the fourth driven gear 35 on the stirring shaft 32, causing the stirring shaft 32 to rotate around its own axis. The locking shaft unit 36, as the core control component for switching the stirring mode, achieves the switching between two stirring modes by locking or unlocking the stirring shaft 32. When the sleeve 232 descends along with the adapter ring 233 driven by the second hydraulic cylinder body 234, it drives the locking claw 364 to descend synchronously. The locking claw 364 inserts into one end of the locking groove 6, and the inclined wall surface contacts the locking seat 361. The locking seat 361 slides horizontally under force, and the locking rod 362 at the end is pressed against the stirring shaft 32 to lock it. At this time, the spring 363 is compressed. When the locking claw 364 disengages from the locking groove 6, the spring 363 provides elastic restoring force to the locking seat 361 to achieve unlocking.

[0042] Stirring mode switching logic: Single revolution stirring: The sleeve 232 descends, causing the locking claw 364 to insert into the locking groove 6. Its inclined wall forms a pressure on the trapezoidal inclined surface of the locking seat 361, pushing the locking seat 361 to slide against the resistance of the spring 363. The locking rod 362 extends and presses against the stirring shaft 32, so that the stirring shaft 32 and the stirring frame 31 are relatively fixed. At the same time, the shaft tube 231 unlocks and rotates, and the power is transmitted to the stirring shaft 32. The stirring frame 31 drives the stirring shaft 32 to revolve around the heating cylinder 121 for single revolution stirring. Revolutionary and rotational combined stirring: When the sleeve 232 rises, it causes the locking claw 364 to disengage from the locking groove 6, the squeezing force disappears, the spring 363 elastically resets and pushes the locking seat 361 to slide, the locking rod 362 retracts and separates from the stirring shaft 32, releasing the restriction on the stirring shaft 32; if the shaft tube 231 drives the locking frame 236 to move through the electric push rod 235 to lock the shaft tube 231, then no power is transmitted to the stirring shaft 32, and the stirring shaft 32 only revolves with the stirring frame 31. At the same time, when the stirring shaft 32 rotates around the first driven gear 237 and the second driven gear 238 on the sleeve 232, it can mesh with the gears on the sleeve 232 through the third driven gear 34 and the fourth driven gear 35 on the stirring shaft 32, and with the rotation, it will drive the stirring shaft 32 to rotate in a combined manner; The revolution or rotation of the stirring structure 3 drives the material in the reactor to circulate throughout the entire process, achieving simultaneous heat conduction of heating and stirring, completely eliminating thermal breaks, and ensuring uniform temperature in the reactor. At the same time, continuous material circulation and shearing prevent local accumulation of material and scum buildup, preventing material crusting from the source and ensuring the efficient progress of the anaerobic digestion reaction.

[0043] The overall operation process is summarized as follows: The overall process of "preheating start-up, low-speed stirring, temperature rise and speed adjustment, high-speed or multi-speed stirring, reaction completion, and material discharge" first introduces heat medium into the outer heating chamber and the central heating cylinder 121 through the first interface 7 and the conveying interface 123 of the main structure 1 to achieve reactor preheating. When the drive component 22 switches to the low speed position, the motor 223 starts, and the power is transmitted to the stirring structure 3 via the drive shaft 224. The stirring structure 3 switches the stirring mode according to the viscosity of the material and performs low-speed stirring to complete the cold start of anaerobic digestion. Once the temperature inside the reactor reaches the suitable temperature for anaerobic digestion, the drive component 22 switches to high speed, and the control component 23 performs secondary speed regulation according to the material state to adjust the stirring speed. During the reaction, the stirring structure 3 continuously performs a combined revolution or rotation (or switches to single revolution as needed), which, together with the double-layer heating, achieves uniform mixing and temperature of materials, prevents crust formation, and ensures full contact between microorganisms and substrates; After the anaerobic digestion reaction is completed, heating and stirring are stopped, and the digested materials (biogas residue and biogas slurry) are discharged through the discharge pipe of base 111, thus completing the entire treatment process.

[0044] In summary, the solution, through its simple mechanical structure design, achieves the linkage and flexible control of the three core functions of speed regulation, stirring, and heating. It precisely solves the industry pain points in existing high-solids-content anaerobic treatment, such as insufficient stirring of viscous materials, easy crusting, uneven heating, and poor equipment adaptability. At the same time, it has the advantages of simple structure, low energy consumption, convenient maintenance, and wide applicability, which greatly improves the reaction efficiency, system stability, and engineering application value of high-solids-content anaerobic digestion.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-solids-content anaerobic digester, characterized in that, It includes a main structure (1), a driving structure (2) and an agitation structure (3). The driving structure (2) is fixedly installed inside the main structure (1), and the agitation structure (3) is fixedly installed on the driving structure (2). The agitation structure (3) is driven to rotate by the driving structure (2). The main structure (1) is used to support and can effectively heat the input heat medium to prevent thermal breakage. The drive structure (2) is used for power output to drive the stirring structure (3) to rotate for internal stirring. The drive structure (2) can adjust the speed level to adjust the speed of the stirring structure (3). The stirring structure (3) can control the stirring form.

2. The high-solids-content anaerobic digester according to claim 1, characterized in that, The main structure (1) includes a main component (11) and a central heating component (12); the central heating component (12) is fixedly disposed inside the main component (11) and located in the middle.

3. The high-solids-content anaerobic digester according to claim 2, characterized in that, The main component (11) includes a base (111), a plurality of tank units (112), a plurality of sealing caps (113), and a tank cover (114). The base (111) is circular and has two pairs of legs on its lower wall. A discharge pipe is installed on the lower wall of the base (111). Several tank units (112) are each composed of an H-shaped outer tube (1121) fixedly fitted onto a concentric inner tube (1122). A crossbeam connects the outer tube and the inner tube (1122). A heating chamber is formed between the inner tube (1122) and the outer tube (1121). Several tank units (112) can be stacked and assembled sequentially by bolts and fixedly mounted on the base (111). The inner tube (1122) of the tank unit (112) is connected to the discharge pipe. The front and rear side walls of the tank units (112) are symmetrically provided with a first interface (7) that communicates with the heating chamber. The left and right side walls of the tank units (112) are symmetrically provided with a second interface (8) that communicates with the inner tube (1122). The sealing caps (113) are detachably installed on the first interface (7) and the second interface (8) respectively to cover and seal. The tank cover (114) is detachably fastened to the top of the tank unit (112).

4. The high-solids-content anaerobic digester according to claim 3, characterized in that, The central heating assembly (12) includes a heating cylinder (121), a return plate (122), and a pair of conveying ports (123). The heating cylinder (121) is T-shaped and is fixedly installed in the middle of the base (111). The heating cylinder (121) is vertically installed in the middle of several tank units (112). The reflux plate (122) is fixedly installed at the bottom of the heating cylinder (121). The reflux plate (122) can isolate the bottom space of the heating cylinder (121) into two heating chambers. The heating chambers at the top of the reflux plate (122) are interconnected. One end of a pair of conveying interfaces (123) passes through the base (111) and the conveying interfaces (123) are connected to the heating chambers on both sides of the heating cylinder (121).

5. The high-solids-content anaerobic digester according to claim 4, characterized in that, The drive structure (2) includes a drive box (21), a drive assembly (22), and a control assembly (23); The drive box (21) is fixedly installed in the middle of the upper inner wall of the can lid (114), and the drive box (21) is a box structure without a lower wall. The drive assembly (22) is fixedly installed inside the drive box (21) and near the top. The control assembly (23) is fixedly installed on the front side wall inside the drive box (21), and the control assembly (23) is located below the drive assembly (22).

6. The high-solids-content anaerobic digester according to claim 5, characterized in that, The drive assembly (22) includes a drive base (220), a base (221), a first hydraulic cylinder body (222), a motor (223), a drive shaft (224), a pair of first gears (225), and a pair of second gears (226). One end of the drive seat (220) is fixedly installed on the front side wall inside the drive box (21) and near the top center. The other end of the drive seat (220) is fitted with a first bearing (41). The left and right side walls of the other end of the drive seat (220) are symmetrically provided with lifting ports. The base (221) has a Z-shaped structure. The middle part of the base (221) moves through the lifting ports. One end of the base (221) is located above the other end of the drive seat (220). The other end of the base (221) is located behind and below the drive seat (220). One end of the first hydraulic cylinder body (222) is fixedly installed through the drive seat (220). The telescopic end of the first hydraulic cylinder body (222) is connected to one end of the base (221). The first hydraulic cylinder body (222) can drive the base (221) to lift. The motor (223) is fixedly installed on the lower wall of the other end of the base (221). The drive shaft ( 224) One end is fixedly inserted into the middle of the first bearing (41), and the drive shaft (224) is located in front of the motor (223). The other end of the drive shaft (224) passes through the bottom of the drive box (21). A pair of first gears (225) are fixedly mounted on the drive end of the motor (223) and the drive shaft (224). The first gears (225) are staggered in the vertical direction. A pair of second gears (226) have a smaller diameter than the first gear (225). A pair of second gears (226) are fixedly mounted on the drive end of the motor (223) and the drive shaft (224). The second gears (226) are staggered below and above the first gears (225). The first gear (225) and the second gear (226) on the drive end of the motor (223) mesh with the second gear (226) and the first gear (225) on the drive shaft (224).

7. The high-solids-content anaerobic digester according to claim 6, characterized in that, The control assembly (23) includes a control seat (230), a shaft tube (231), a sleeve (232), a transition ring (233), a second hydraulic cylinder body (234), an electric push rod (235), a lock frame (236), a first driven gear (237), and a second driven gear (238). One end of the control seat (230) is fixedly installed on the front side wall inside the drive box (21) and located below the drive seat (220). A second bearing (42) corresponding to the first bearing (41) is provided in the middle of the control seat (230). A sliding groove (5) is provided through the lower wall of the other end of the control seat (230). One end of the shaft tube (231) is fixedly fitted in the middle of the second bearing (42), and the shaft tube (231) is fitted on the outside of the drive shaft (224). The side wall of the shaft tube (231) is symmetrically provided with force-applying ribs. The sleeve (232) is movably fitted on the shaft tube (231), and the inner side wall of the sleeve (232) is provided with a force-applying groove that fits with the force-applying ribs. The sleeve (232) can move up and down along the shaft tube (231). One end of the adapter ring (233) is fixedly fitted on the top end of the sleeve (232). The second hydraulic cylinder body (2 34) One end is fixed through the control seat (230), and the telescopic end of the second hydraulic cylinder body (234) is connected to the other end of the adapter ring (233). The electric push rod (235) is fixedly set in the middle of the upper wall of the other end of the control seat (230). The middle part of the lock frame (236) is movably inserted into the sliding groove (5). One end of the lock frame (236) is concave. One end of the lock frame (236) corresponds to the shaft tube (231). The other end of the lock frame (236) is L-shaped. The other end of the lock frame (236) is connected to the telescopic end of the electric push rod (235). The first driven gear (237) is fixedly fitted on the sleeve (232). The second driven gear (238) is fixedly fitted on the sleeve (232) and located below the first driven gear (237). The diameter of the second driven gear (238) is smaller than that of the first driven gear (237).

8. The high-solids-content anaerobic digester according to claim 7, characterized in that, The agitation structure (3) includes an agitator (31), a pair of agitator shafts (32), several agitator plates (33), a pair of third driven gears (34), a pair of fourth driven gears (35), and a pair of locking shaft units (36). The stirring frame (31) is fixedly mounted in the middle on the other end of the drive shaft (224), and the stirring frame (31) is located above the heating cylinder (121). A third bearing (43) is embedded in the middle of both ends of the stirring frame (31), and an L-shaped locking groove is provided near the third bearing (43). A locking hole penetrating the bottom of the third bearing (43) is provided on the side wall of the locking groove. One end of a pair of stirring shafts (32) is fixedly fixed through the middle of the third bearing (43), and the bottom end of the stirring shafts (32) penetrates several tank units (112). Several stirring plates (33) are equidistantly arranged on the bottom end of the stirring shafts (32). The third driven gear (34) is the same as the first driven gear (237). A pair of third driven gears (34) are fixedly mounted on the top of the stirring shaft (32), and the third driven gears (34) are respectively located on both sides of the second driven gear (238) and mesh with each other. A pair of fourth driven gears (35) are respectively fixedly mounted on the top of the stirring shaft (32) and located above the third driven gears (34). A pair of fourth driven gears (35) can respectively mesh with the first driven gear (237). A pair of locking shaft units (36) are respectively movably mounted in the locking groove (6) and are symmetrical to each other.

9. The high-solids-content anaerobic digester according to claim 8, characterized in that, The locking shaft unit (36) includes a locking seat (361), a locking rod (362), a spring (363), and a locking claw (364). The lock seat (361) is installed in the lock groove (6) after being moved. One end of the lock seat (361) is a trapezoidal structure with an inclined wall. One end of the lock rod (362) is fixedly set on the other end of the lock seat (361). The lock rod (362) is movably inserted into the lock hole. The lock rod (362) can be pressed against the stirring shaft (32). The spring (363) is movably fitted on the lock rod (362). The spring (363) is located between the other end of the lock seat (361) and the side wall of the lock groove (6). The lock claw (364) is L-shaped. One end of the lock claw (364) is fixedly set on the bottom side wall of the sleeve (232). The lower wall of the other end of the lock claw (364) is an inclined wall. The other end of the lock claw (364) can be inserted into the lock groove (6).

10. The high-solids-content anaerobic digester according to claim 9, characterized in that, The locking claw (364) can descend through the sleeve (232) to attach to one end of the locking seat (361) and push the locking seat (361) after being pressed down.

Images