Anaerobic fermentation shell breaking and stirring device
By designing a stirring device with arc-leaf and flat-leaf blades, the problem of scalding during anaerobic fermentation is solved, uniform stirring of raw materials and efficient gas production are achieved, and the safety and gas production rate of the system are improved.
Patent Information
- Application Number
- CN202421404755.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-06-19
AI Technical Summary
During the anaerobic fermentation process, the scum layer hardens the shell on the upper part of the reactor, and it is difficult to break the shell in time, resulting in uneven stirring of raw materials and a decrease in the gas production rate of biogas. In severe cases, the reactor tank may burst, affecting system safety.
Anaerobic fermentation and shell stirring device is designed, combining arc-leaf flat-leaf blades and a stirring shaft with cutting heads. Through the push of arc-leaf blades, the cracking and uniform stirring of the scum layer is achieved. The cutting head can adjust the angle and length to adapt to different conditions.
The uniform stirring of fermentation raw materials is achieved, the biogas gas production rate is improved, the safety of the system is enhanced, the tank body is avoided, and the operation stability of the fermentation system is improved.
Smart Images
Figure CN223189184U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of agricultural waste treatment equipment, and relates to an anaerobic fermentation shell-breaking stirring device. Background Art
[0002] Anaerobic fermentation to produce biogas is an important means for treating agricultural waste in China at present. Crop straws and livestock manure are used to produce biogas through the mixed anaerobic fermentation process technology, which not only realizes the harmless and resource utilization of organic waste, reduces environmental pollution, but also purifies and refines the produced biogas, which can be used as a substitute for natural gas and is of great significance for solving the energy shortage problem.
[0003] At present, during the anaerobic fermentation process, a scum layer is easily formed on the upper part of the reactor and hardens to form a shell. It is very difficult for the stirring blades on the stirring shaft to complete the shell-breaking treatment in time, the raw materials are not stirred evenly enough, the biogas production rate is significantly reduced, and the biogas cannot enter the gas storage device smoothly, affecting the normal operation of the fermentation system. When the shell is seriously formed, it may even cause the reactor tank to burst, endangering personal safety. Content of the Utility Model
[0004] The purpose of the utility model is to provide an anaerobic fermentation shell-breaking stirring device, which integrates three functions of anaerobic fermentation stirring, cutting and shell-breaking, efficiently treats agricultural waste raw materials, makes the raw materials stirred more evenly, has a higher biogas production rate and higher safety.
[0005] The technical scheme adopted by the utility model is as follows:
[0006] An anaerobic fermentation shell-breaking stirring device includes a tank body, a rotation driving mechanism and a stirring shaft. The tank body is suitable for storing fermentation raw materials. The driving end of the rotation driving mechanism is connected to the stirring shaft. The stirring shaft vertically extends into the interior of the tank body from the top of the tank body. A plurality of arc-shaped blade-type blades are arranged at intervals along the length direction of the stirring shaft. Above the arc-shaped blade-type blade at the top layer, a flat blade-type blade is arranged on the stirring shaft. The tail end of the flat blade-type blade is vertically rotatably connected with a cutting head. A first locking mechanism for locking the cutting head is arranged between the cutting head and the flat blade-type blade. A cutting part is telescopically arranged at the tail of the cutting head and is locked by a second locking mechanism.
[0007] Furthermore, a plurality of connecting parts for connecting shell-breaking components are arranged at intervals along the length direction of the flat blade-type blade.
[0008] Furthermore, the connecting part includes a threaded hole.
[0009] Further, the first locking mechanism includes a first bolt. A plurality of first threaded holes are equidistantly arranged along the circumference of the rotation axis of the head of the cutting head. The flat blade type blade is provided with a first positioning hole, so that the first bolt can pass through the first positioning hole and be threadedly connected to one of the first threaded holes.
[0010] Further, the second locking mechanism includes a second bolt. A plurality of second threaded holes are arranged at intervals along the length direction of the cutting part. The tail of the cutting head is provided with a second positioning hole, so that the second bolt can pass through the second positioning hole and be threadedly connected to one of the second threaded holes.
[0011] Further, the included angle between the cutting head and the flat blade type blade is 45 - 60 degrees.
[0012] Further, the self-inclination angle of the arc blade type blade is 45 degrees.
[0013] Further, a water seal sleeve is connected to the outer periphery of the upper part of the stirring shaft.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] The shell-breaking stirring device of the present utility model includes a tank body, a rotation driving mechanism and a stirring shaft. The arc blade type blades located at the lower part of the stirring shaft push the fermentation raw materials to make the axial and radial flow diversion smooth. The flat blade type blades are provided with cutting heads, and the cutting parts of the cutting heads can effectively contact the crust surface, break the crust layer, form a vortex, stir the fermentation raw materials to flow horizontally to disperse the materials and break the shell. The position of the cutting part of the cutting head is at the liquid surface where the upper floating slag accumulates. Under the drive of the stirring shaft, the cutting part cuts the crust materials on the liquid surface, and the floating slag can be discharged out of the tank body from the overflow port of the tank body. The rotation and mutual cooperation of the two types of blades can continuously push the organic matters entering the fermentation tank and make them fully mixed with the inoculum. In order to achieve a better shell-breaking effect, the rotation angle and the length of the cutting head can also be flexibly adjusted. The shell-breaking stirring device of the present application integrates three functions of anaerobic fermentation stirring, cutting and shell-breaking, efficiently processes agricultural waste raw materials, makes the raw material stirring more uniform, has a higher gas production rate and higher safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained according to these drawings, where:
[0017] Figure 1This is a schematic structural diagram of an anaerobic fermentation shell-breaking stirring device according to an embodiment of the present utility model;
[0018] Figure 2 is Figure 1 an enlarged view of part A in
[0019] Figure 3 is Figure 1 an enlarged view of part B in
[0020] Markings in the figure:
[0021] 10 - tank body;
[0022] 20 - rotation driving mechanism;
[0023] 30 - stirring shaft; 31 - arc blade; 32 - flat blade; 321 - connecting part; 322 - first positioning hole; 33 - cutting head; 331 - cutting part; 3311 - second threaded hole; 332 - first threaded hole; 333 - second positioning hole; 34 - water seal sleeve; 35 - first bolt; 36 - second bolt. Specific embodiments
[0024] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. That is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.
[0026] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.
[0027] As described in the background art, during the anaerobic fermentation process, a scum layer is easily formed on the upper part of the reactor and hardens to form a crust. It is difficult for the stirring blades on the stirring shaft to complete the crust-breaking treatment in time, the raw materials are not stirred sufficiently and evenly, the biogas production rate is significantly reduced, and the biogas cannot smoothly enter the gas storage device, affecting the normal operation of the fermentation system. When the crust is severely formed, it may even cause the reactor tank to burst, endangering personal safety.
[0028] Based on this, the inventor created an anaerobic fermentation crust-breaking stirring device of the present application to solve the above technical problems.
[0029] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.
[0030] Embodiment
[0031] Please refer to Figures 1 to 3 , an anaerobic fermentation crust-breaking stirring device, comprising a tank body 10, a rotation driving mechanism 20 and a stirring shaft 30. The tank body 10 is adapted to store fermentation raw materials, and the driving end of the rotation driving mechanism 20 is connected to the stirring shaft 30. For example, a feed inlet, an overflow port, an exhaust port, etc. may be provided on the tank body 10. For example, the rotation driving mechanism 20 may be a motor, or a hydraulic motor, etc., and the present utility model is not limited thereto. For example, the rotation driving mechanism 20 may also include transmission mechanisms such as belt transmission and gear transmission.
[0032] The stirring shaft 30 vertically extends into the interior of the tank body 10 from the top of the tank body 10, and a plurality of arc blade type blades 31 are arranged at intervals along the length direction of the stirring shaft 30. Above the arc blade type blade 31 at the top layer, a flat blade type blade 32 is arranged on the stirring shaft 30. Under the same operating conditions, the discharge performance of the arc blade type blade 31 is 30% higher than that of the inclined blade type blade, and the power level can be maintained at the same level, and the comprehensive performance is also better than that of the inclined blade type blade. For example, both the arc blade type blade 31 and the flat blade type blade 32 can be evenly arranged around the stirring shaft 30. For example, at the same height, the number of both can be two. The tail end of the flat blade type blade 32 is vertically rotatably connected with a cutting head 33, and a first locking mechanism for locking the cutting head 33 is arranged between the cutting head 33 and the flat blade type blade 32. The tail part of the cutting head 33 is telescopically provided with a cutting part 331 and is locked by a second locking mechanism. Here, it should be noted that both "tail part" and "tail end" refer to the end of the corresponding component away from the stirring shaft 30. Here, that is to say, the angle between the cutting head 33 and the flat blade type blade 32 can be flexibly changed and can be fixed by the first locking mechanism. The cutting part 331 can also be telescopic, so that the length of the cutting head 33 can be flexibly adjusted and can be fixed by the second locking mechanism. For example, the installation height of the arc blade type blade can be determined according to the volume of the tank body 10, the position of the feed inlet and the diameter of the tank body 10. The installation height of the flat blade type blade 32 is determined according to the liquid level position, so that the part of the cutting part 331 exceeding the liquid level, and the overall installation height is determined according to the inner diameter ratio of the tank body 10, so that its Morgan linear velocity is close to 10 m / min.
[0033] The shell-breaking stirring device of the present utility model comprises a tank body 10, a rotation driving mechanism 20 and a stirring shaft 30. The arc blade type blades located at the lower part of the stirring shaft 30 push the fermentation raw materials to make the axial and radial flow smooth. The flat blade type blade 32 is provided with a cutting head 33. The cutting part 331 of the cutting head 33 can effectively contact the crust surface, break the crust layer, form a vortex, stir the fermentation raw materials to flow horizontally, disperse the materials and break the shell. The position of the cutting part 331 of the cutting head 33 is at the liquid surface where the upper floating slag accumulates. Under the drive of the stirring shaft 30, the cutting part 331 cuts the crust materials on the liquid surface, and the floating slag can be discharged out of the tank body 10 from the overflow port of the tank body 10. The rotation and mutual cooperation of the two types of blades can continuously push the organic matters entering the fermentation tank and make them fully mixed with the inoculum. In order to achieve a better shell-breaking effect, the rotation angle and the length of the cutting head 33 can also be flexibly adjusted. The shell-breaking stirring device of the present application integrates three functions of anaerobic fermentation stirring, cutting and shell-breaking, efficiently processes agricultural waste raw materials, makes the raw materials stirred more evenly, has a higher gas production rate and higher safety.
[0034] In another embodiment, a plurality of connecting portions 321 for connecting the shell-breaking components are arranged at intervals along the length direction of the flat blade 32. Here, the shell-breaking components are also used to break the shell at the liquid surface. By arranging the connecting portions 321, the shell-breaking components can be added according to the actual situation, so as to increase the shell-breaking surface and further improve the smoothness of biogas. Preferably, the connecting portion 321 includes a threaded hole.
[0035] In another embodiment, the first locking mechanism includes a first bolt 35. A plurality of first threaded holes 332 are arranged at equal intervals along the circumference of the rotation axis of the head of the cutting head 33. The flat blade 32 is provided with a first positioning hole 322, so that the first bolt 35 can pass through the first positioning hole 322 and be threadedly connected with one of the first threaded holes 332. With this setting, when the cutting head 33 rotates to a certain angle, the angle can be fixed by the first bolt 35 passing through the first positioning hole 322 and connecting with the first threaded hole 332, and the fixing is simple and reliable. Preferably, the second locking mechanism includes a second bolt 36. A plurality of second threaded holes 3311 are arranged at intervals along the length direction of the cutting portion 331. The tail of the cutting head 33 is provided with a second positioning hole 333, so that the second bolt 36 can pass through the second positioning hole 333 and be threadedly connected with one of the second threaded holes 3311. With this setting, the position of the cutting head 33 can be fixed by the second bolt 36, so as to fix the overall length of the cutting head 33.
[0036] In another embodiment, the included angle between the cutting head 33 and the flat blade 32 is 45-60 degrees. Through field practice, the shell-breaking effect is better at the included angle within this range, and the specific angle can be determined according to the diameter of the tank body 10 and the liquid surface height. Preferably, the self-inclination angle of the arc blade 31 is 45 degrees.
[0037] In another embodiment, a water seal sleeve 34 is connected to the outer periphery of the upper part of the stirring shaft 30. The water seal sleeve 34 can effectively prevent the fermentation raw materials from entering the bearing interior, ensuring the normal operation and service life of the equipment.
[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made by those skilled in the art within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An anaerobic fermentation shell-breaking and stirring device, characterized in that: It includes a tank body, a rotating drive mechanism and a stirring shaft. The tank body is suitable for storing fermentation raw materials. The driving end of the rotating drive mechanism is connected to the stirring shaft. The stirring shaft extends vertically into the interior of the tank body from the top of the tank body. The stirring shaft is provided with a plurality of arc-leaf blades at intervals along its length direction. Above the arc-leaf blades located on the top layer, the stirring shaft is provided with flat-leaf blades. The tail end of the flat-leaf blade is vertically rotatably connected to a cutting head. A first locking mechanism for locking the cutting head is provided between the cutting head and the flat-leaf blade. The tail of the cutting head is telescopically provided with a cutting portion and is locked by a second locking mechanism.
2. The anaerobic fermentation shell-breaking and stirring device according to claim 1, characterized in that: The flat-blade blade is provided with a plurality of connection parts for connecting the shell breaking components at intervals along the length direction of the flat-blade blade.
3. The anaerobic fermentation shell-breaking and stirring device according to claim 2, characterized in that: The connecting portion includes a threaded hole.
4. The anaerobic fermentation shell-breaking and stirring device according to claim 1, characterized in that: The first locking mechanism includes a first bolt, the head of the cutting head is provided with a plurality of first threaded holes at equal intervals along the circumference of its rotation axis, and the flat-blade blade is provided with a first positioning hole, so that the first bolt can pass through the first positioning hole and be threadedly connected to one of the first threaded holes.
5. The anaerobic fermentation shell-breaking and stirring device according to claim 4, characterized in that: The second locking mechanism includes a second bolt, the cutting portion is provided with a plurality of second threaded holes spaced apart along its length, and the tail of the cutting head is provided with a second positioning hole so that the second bolt can pass through the second positioning hole and be threadedly connected to one of the second threaded holes.
6. The anaerobic fermentation shell-breaking and stirring device according to any one of claims 1 to 5, characterized in that: The included angle between the cutting head and the flat-blade blade is 45-60 degrees.
7. The anaerobic fermentation shell-breaking and stirring device according to claim 6, characterized in that: The inclination angle of the arc-shaped blade is 45 degrees.
8. The anaerobic fermentation shell-breaking and stirring device according to claim 6, characterized in that: The outer periphery of the upper portion of the stirring shaft is connected with a water seal sleeve.