Synergistic anaerobic fermentation system for straw and livestock and poultry manure
By designing a system for the coordinated anaerobic fermentation of straw and livestock and poultry manure, the gear shaft and transmission gear are engaged to drive the rotating rod to rotate, and the return spring and cam mechanism are combined to realize the reciprocating motion of the stirring blade. This solves the problems of uneven stirring and ammonia nitrogen inhibition in the coordinated anaerobic fermentation of straw and livestock and poultry manure, and improves the biogas production and treatment efficiency.
Patent Information
- Application Number
- CN202422701329.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-06
AI Technical Summary
In the existing technology, during the anaerobic fermentation of straw and livestock and poultry manure, the high ammonia nitrogen content in chicken manure leads to ammonia nitrogen inhibition during the anaerobic fermentation process, affecting biogas production and causing uneven stirring.
A straw and livestock and poultry manure collaborative anaerobic fermentation system is adopted, which includes a mixing box, a mixing mechanism and a conveying mechanism. The rotating rod is driven to rotate by the engagement of the gear shaft and the transmission gear, and the reciprocating motion of the stirring blade is realized in conjunction with the return spring and the cam mechanism to ensure that the material is fully and evenly stirred. The material is then transported by the conveying motor driving the conveying screw.
It achieves full and uniform mixing of straw and livestock and poultry manure, increases biogas production, reduces the problem of uneven mixing, and reduces material waste and processing costs.
Smart Images
Figure CN223329293U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of anaerobic fermentation treatment of agricultural solid waste, and in particular to a system for the coordinated anaerobic fermentation of straw and livestock and poultry manure. Background Art
[0002] Agricultural solid waste refers to solid waste discharged from agricultural production processes and farmers' daily lives. Examples include waste bamboo, wood chips, rice straw, wheat straw, bagasse, human and animal feces, and obsolete farm machinery. Because straw, among agricultural solid waste, has a low moisture content, while livestock and poultry manure has a high moisture content, anaerobic fermentation of straw and livestock and poultry manure alone is uneconomical. This led to the development of a co-anaerobic process for straw and livestock and poultry manure. Currently, the co-anaerobic treatment of straw and livestock and poultry manure has been effective. However, when the livestock and poultry manure is chicken or pig manure, especially chicken manure, the high ammonia nitrogen content in chicken manure can lead to ammonia nitrogen inhibition during anaerobic fermentation, seriously affecting biogas production.
[0003] There are currently three conventional solutions to the problem of ammonia nitrogen inhibition in anaerobic chicken manure:
[0004] The first method is to add no more than 5% of the total anaerobic feed. Although this method avoids ammonia nitrogen poisoning during the anaerobic fermentation process, the utilization rate of the raw chicken manure is very low. The anaerobic fermentation gas production rate of chicken manure is very high among livestock and poultry manure. This method cannot fully utilize the raw chicken manure, resulting in the accumulation of chicken manure and waste of raw materials.
[0005] The second method is to dilute the raw chicken manure with water, and at the same time, denitrify the biogas slurry after anaerobic fermentation and return it to the anaerobic fermentation tank. Although this method avoids the inhibitory effect of ammonia nitrogen during the anaerobic fermentation process, the need to dilute the chicken manure with water increases the amount of biogas slurry, making biogas slurry treatment difficult. At the same time, the cost of denitrifying and returning the biogas slurry is very high, which increases the overall cost.
[0006] The third method is to feed the raw chicken manure directly into the plug flow reactor and discharge it from the anaerobic reactor in time when the ammonia nitrogen content in the chicken manure reaches the ammonia nitrogen inhibition concentration. This method can avoid the inhibitory effect of ammonia nitrogen during anaerobic fermentation and ensure a higher gas production rate. However, it requires setting up another anaerobic reactor to continuously provide bacterial strains. The design and operating environment are complex, and the floor space and investment are large.
[0007] In the prior art, after fermentation, the materials need to be stirred and mixed. However, since the stirring blades are fixed, the stirring of the materials is not sufficiently and evenly distributed. To this end, we propose a straw and livestock manure synergistic anaerobic fermentation system to solve the above problem. Utility Model Content
[0008] In the prior art, after the material is fermented, it needs to be stirred and mixed. Since the stirring blades are fixed, the stirring of the material is not sufficiently uniform. The present application provides a straw and livestock and poultry manure collaborative anaerobic fermentation system.
[0009] The present application provides a straw and livestock manure collaborative anaerobic fermentation system that adopts the following technical solutions:
[0010] A straw and livestock and poultry manure collaborative anaerobic fermentation system includes a stirring box, a bottom box is fixedly installed at the bottom of the stirring box, a conveying seat that matches the stirring box is fixedly installed on the bottom box, a conveying motor is fixedly installed at one end of the conveying seat, a conveying mechanism is provided on the conveying seat, a top box is fixedly installed on the top of the stirring box, a stirring motor is fixedly installed on the top of the top box, a transmission mechanism is provided in the top box, a stirring mechanism is provided in the stirring box, an anaerobic reactor inner tank is fixedly provided in the stirring box, an anaerobic reactor outer tank is fixedly provided on the inner wall of one side of the stirring box, and a vacuum feeder is fixedly installed on one side of the stirring box, and a first feeding pipe is connected between the vacuum feeder and the anaerobic reactor outer tank.
[0011] By adopting the above technical solution, the stirring mechanism can stir and mix the materials, the transmission mechanism can push the stirring mechanism up and down, so that the stirring mechanism can stir the materials fully and evenly, and the conveying mechanism can convey the stirred materials.
[0012] Preferably, a feed pump is fixedly installed on the other side of the mixing box, and a second feed pipe is connected between the feed pump and the inner tank of the anaerobic reactor.
[0013] By adopting the above technical solution, the feed pump can transport the material into the inner tank of the anaerobic reactor through the second feed pipe.
[0014] Preferably, the conveying mechanism includes a conveying rotating rod rotatably connected to the conveying seat, the conveying rotating rod is fixedly connected to the output shaft of the conveying motor, a conveying screw is fixedly provided on the conveying rotating rod, a connecting pipe is connected between the mixing box and the conveying seat, and a discharge port is provided at one end of the bottom of the conveying seat.
[0015] By adopting the above technical solution, the conveying rotating rod drives the conveying screw to rotate, and conveys the material in the conveying seat to one end of the discharge port of the conveying seat, and is discharged through the discharge port.
[0016] Preferably, the stirring mechanism includes a driving rod, which is rotatably connected to the stirring box, the driving rod is fixedly connected to the output shaft of the stirring motor, and the bottom end of the driving rod is fixedly connected to the gear shaft.
[0017] By adopting the above technical solution, the output shaft of the stirring motor drives the driving rod to rotate, and the driving rod drives the gear shaft to rotate.
[0018] Preferably, two transmission gears are symmetrically meshed and connected to the gear shaft, the bottoms of the two transmission gears are fixedly connected to a rotating rod, and a plurality of stirring blades are fixedly provided on the outer walls of the two rotating rods.
[0019] By adopting the above technical solution, the gear shaft drives the two rotating rods to rotate by meshing with the two transmission gears. When the two rotating rods rotate, they can drive multiple stirring blades to rotate and stir the materials in the tank of the anaerobic reactor.
[0020] Preferably, the transmission mechanism includes a first bevel gear fixedly connected to the driving rod, transmission rods are rotatably connected on both sides of the top box, one end of the two transmission rods is fixedly connected to the second bevel gear, the two second bevel gears are meshed with the first bevel gear, the other ends of the two transmission rods are fixedly connected to a cam, a reset groove is provided on the inner wall of the inner tank of the anaerobic reactor, reset springs are fixedly connected in the two reset grooves, reset blocks are fixedly connected to the two reset springs, one side of the two reset blocks is fixedly connected to a support plate, and the two rotating rods are rotatably connected to the two support plates respectively.
[0021] By adopting the above technical solution, when the two reset springs release their elastic force, they can drive the two reset blocks to reset upward, so that the two reset blocks move back and forth up and down, and the two reset blocks drive the two support plates to move up and down.
[0022] Preferably, the two reset blocks are slidably connected to the two reset grooves respectively, and the tops of the two reset blocks are fixedly connected with a pressure rod that fits with the two cams.
[0023] By adopting the above technical solution, when the two cams rotate, they can reciprocate and squeeze the two pressure rods to move downward, and drive the two reset blocks to slide in the two reset grooves.
[0024] Preferably, a first observation window corresponding to the outer tank of the anaerobic reactor is provided on the front side of the mixing box, and a second observation window corresponding to the inner tank of the anaerobic reactor is provided on the mixing box.
[0025] By adopting the above technical solution, the first observation window and the second observation window are used to facilitate observation of the conditions inside the outer tank and the inner tank of the anaerobic reactor.
[0026] In summary, this application includes at least one of the following beneficial technical effects:
[0027] 1. The gear shaft is engaged with the two transmission gears to drive the two rotating rods to rotate. When the two rotating rods rotate, they can drive multiple stirring blades to rotate and stir the materials in the tank of the anaerobic reactor;
[0028] 2. With the help of the elastic force released by the two return springs, the two return blocks can be driven to return to their original position, so that the two return blocks can move back and forth up and down. The two return blocks drive the two support plates to move up and down, and the two transmission gears above the two support plates can move vertically up and down without disengaging from the gear shaft. When the two support plates move up and down, the two rotating rods can drive the multiple stirring blades to move up and down and rotate back and forth, thereby achieving the effect of fully and evenly stirring the materials;
[0029] 3. The output shaft of the conveying motor drives the conveying rotating rod to rotate, and the conveying rotating rod drives the conveying screw to rotate, and conveys the material in the conveying seat to one end of the discharge port of the conveying seat and is discharged through the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 This is a schematic diagram of the overall structure of a straw and livestock and poultry manure collaborative anaerobic fermentation system according to an embodiment of the present application;
[0031] Figure 2 This is a schematic diagram of a side view structure of a straw and livestock and poultry manure collaborative anaerobic fermentation system according to an embodiment of the present application;
[0032] Figure 3 The embodiment of this application mainly reflects a structure of a straw and livestock and poultry manure synergistic anaerobic fermentation system Figure 2 Schematic diagram of part A in FIG;
[0033] Figure 4 This is a top view schematic diagram of a gear shaft and transmission gear of a straw and livestock manure collaborative anaerobic fermentation system structure mainly embodied in an embodiment of the present application.
[0034] Figure numerals: 1, mixing box; 2, top box; 3, stirring motor; 4, bottom box; 5, conveying seat; 6, conveying motor; 7, inner tank of anaerobic reactor; 8, outer tank of anaerobic reactor; 9, vacuum feeder; 10, first feeding pipe; 11, feeding pump; 12, second feeding pipe; 13, conveying rotating rod; 14, conveying screw; 15, connecting pipe; 16, driving rod; 17, gear shaft; 18, first bevel gear; 19, transmission rod; 20, second bevel gear; 21, cam; 22, reset spring; 23, reset block; 24, pressure rod; 25, support plate; 26, rotating rod; 27, transmission gear; 28, stirring blade; 29, first observation window; 30, second observation window. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-Figure 4 This application is described in further detail.
[0036] The embodiment of the present application discloses a system for the coordinated anaerobic fermentation of straw and livestock and poultry manure.
[0037] Reference Figure 1 and Figure 2 A straw and livestock and poultry manure collaborative anaerobic fermentation system includes a mixing box 1, a bottom box 4 is fixedly installed at the bottom of the mixing box 1, an anaerobic reactor inner tank 7 is fixedly provided in the mixing box 1, an anaerobic reactor outer tank 8 is fixedly provided on the inner wall of one side of the mixing box 1 next to the anaerobic reactor inner tank 7, a vacuum feeder 9 is fixedly installed on one side of the mixing box 1, a first feeding pipe 10 is connected between the vacuum feeder 9 and the anaerobic reactor outer tank 8, a feeding pump 11 is fixedly installed on the other side of the mixing box 1, a second feeding pipe 12 is connected between the feeding pump 11 and the anaerobic reactor inner tank 7, and the feeding pump 11 can transport the material to the anaerobic reactor inner tank 7 through the second feeding pipe 12.
[0038] Reference Figure 1 and Figure 2 In this embodiment, a top box 2 is fixedly installed on the top of the mixing box 1, and a stirring motor 3 is fixedly installed on the top of the top box 2. A stirring mechanism is provided in the mixing box 1, and the stirring mechanism can stir and mix the materials. The stirring mechanism includes a driving rod 16, which is rotatably connected to the mixing box 1. The driving rod 16 is fixedly connected to the output shaft of the stirring motor 3. The bottom end of the driving rod 16 is fixedly connected to the gear shaft 17. The output shaft of the stirring motor 3 drives the driving rod 16 to rotate, and the driving rod 16 drives the gear shaft 17 to rotate. Two transmission gears 27 are symmetrically meshed and connected on the gear shaft 17. The bottoms of the two transmission gears 27 are fixedly connected to rotating rods 26. A plurality of stirring blades 28 are fixedly provided on the outer walls of the two rotating rods 26. The gear shaft 17 drives the two rotating rods 26 to rotate by meshing with the two transmission gears 27. When the two rotating rods 26 rotate, the plurality of stirring blades 28 can be driven to rotate to stir the materials in the inner tank 7 of the anaerobic reactor.
[0039] Reference Figure 2 and Figure 3In this embodiment, a transmission mechanism is provided in the top box 2, and the transmission mechanism can be used to push the stirring mechanism up and down, so that the stirring mechanism can fully and evenly stir the material. The transmission mechanism includes a first bevel gear 18 fixedly connected to the driving rod 16. Both sides of the top box 2 are rotatably connected to a transmission rod 19. One end of the two transmission rods 19 is fixedly connected to a second bevel gear 20. The two second bevel gears 20 are meshed with the first bevel gear 18. The other ends of the two transmission rods 19 are fixedly connected to a cam 21. Reset grooves are provided on the inner wall of the inner tank 7 of the anaerobic reactor. Reset springs 22 are fixedly connected to the two reset grooves. The two reset springs 22 are fixedly connected There is a reset block 23, one side of the two reset blocks 23 is fixedly connected to a support plate 25, and the two rotating rods 26 are rotatably connected to the two support plates 25 respectively. When the two reset springs 22 release the elastic force, the two reset blocks 23 can be driven to reset upward, so that the two reset blocks 23 move back and forth up and down, and the two reset blocks 23 drive the two support plates 25 to move up and down. The two reset blocks 23 are respectively slidably connected to the two reset grooves, and the tops of the two reset blocks 23 are fixedly connected to pressure rods 24 that fit with the two cams 21. When the two cams 23 rotate, the two pressure rods 24 can be squeezed back and forth to move downward, and drive the two reset blocks 23 to slide in the two reset grooves.
[0040] Reference Figure 2 In this embodiment, a conveying seat 5 that cooperates with the mixing box 1 is fixedly installed on the bottom box 4, and a conveying motor 6 is fixedly installed at one end of the conveying seat 5. A conveying mechanism is provided on the conveying seat 5, and the conveying mechanism can convey the stirred material. The conveying mechanism includes a conveying rotating rod 13 rotatably connected to the conveying seat 5, and the conveying rotating rod 13 is fixedly connected to the output shaft of the conveying motor 6. A conveying screw 14 is fixedly provided on the conveying rotating rod 13. A connecting pipe 15 is connected between the mixing box 1 and the conveying seat 5. A discharge port is provided at one end of the bottom of the conveying seat 5. The conveying rotating rod 13 drives the conveying screw 14 to rotate, and transfers the material in the conveying seat 5 to one end of the discharge port of the conveying seat 5, and discharges it through the discharge port.
[0041] Reference Figure 1 In this embodiment, a first observation window 29 corresponding to the anaerobic reactor outer tank 8 is provided on the front side of the mixing box 1, and a second observation window 30 corresponding to the anaerobic reactor inner tank 7 is provided on the mixing box 1. The first observation window 29 and the second observation window 30 are used to facilitate observation of the conditions inside the anaerobic reactor outer tank 8 and the anaerobic reactor inner tank 7.
[0042] The implementation principle of the straw and livestock and poultry manure collaborative anaerobic fermentation system of the present application embodiment is as follows: First, 50t / d of chicken manure (solid content of 20%) is pumped into the inner tank 7 of the anaerobic reactor through the feed pump 11, and 30t / d of straw (solid content of 80%) is put into the external mixing tank with an effective volume of 100m3 by a forklift. The mixing tank is equipped with a strong mixer to mix the straw, reflux liquid and water evenly, and then transported to the outer tank 8 of the anaerobic reactor through the vacuum feeder 9, and the stirring motor 3 is started to stir. The output shaft of the motor 3 drives the driving rod 16 to rotate, and the driving rod 16 drives the gear shaft 17 to rotate. The gear shaft 17 drives the two rotating rods 26 to rotate by meshing with the two transmission gears 27. When the two rotating rods 26 rotate, they can drive multiple stirring blades 28 to rotate to stir the materials in the inner tank 7 of the anaerobic reactor. At the same time, the driving rod 16 drives the first bevel gear 18 to rotate. The first bevel gear 18 uses the meshing with the two second bevel gears 20 to drive the two transmission rods 19 to rotate. The two transmission rods 1 When the two return springs 22 release their elastic force, the two return blocks 23 can be driven to return to their original position, so that the two return blocks 23 can be moved up and down reciprocatingly. The two return blocks 23 drive the two support plates 25 to move up and down, and the two transmission gears 27 above the two support plates 25 can move vertically up and down without disengaging from the gear shaft 17. When the two support plates 25 move up and down, the two rotating rods 26 can drive the multiple stirring blades 28 to move up and down reciprocatingly, thereby achieving the effect of fully and evenly stirring the materials. After the materials are stirred, they can enter the conveying seat 5 through the connecting pipe 15, start the conveying motor 6, so that the output shaft of the conveying motor 6 drives the conveying rotating rod 13 to rotate, and the conveying rotating rod 13 drives the conveying screw 14 to rotate, and conveys the materials in the conveying seat 5 to one end of the discharge port of the conveying seat 5 and is discharged through the discharge port.
[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A straw and livestock and poultry manure collaborative anaerobic fermentation system, comprising a stirring box (1), characterized in that: The bottom of the mixing box (1) is fixedly mounted with a bottom box (4), a conveying seat (5) matched with the mixing box (1) is fixedly mounted on the bottom box (4), a conveying motor (6) is fixedly mounted on one end of the conveying seat (5), a conveying mechanism is provided on the conveying seat (5), a top box (2) is fixedly mounted on the top of the mixing box (1), a stirring motor (3) is fixedly mounted on the top of the top box (2), a transmission mechanism is provided in the top box (2), a stirring mechanism is provided in the mixing box (1), an anaerobic reactor inner tank (7) is fixedly mounted in the mixing box (1), an anaerobic reactor outer tank (8) is fixedly mounted on the inner wall of one side of the mixing box (1) next to the anaerobic reactor inner tank (7), a vacuum feeder (9) is fixedly mounted on one side of the mixing box (1), and a first feeding pipe (10) is connected between the vacuum feeder (9) and the anaerobic reactor outer tank (8).
2. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 1, characterized in that: A feed pump (11) is fixedly installed on the other side of the mixing box (1), and a second feed pipe (12) is connected between the feed pump (11) and the inner tank (7) of the anaerobic reactor.
3. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 1, characterized in that: The conveying mechanism comprises a conveying rotating rod (13) rotatably connected to the conveying seat (5), the conveying rotating rod (13) is fixedly connected to the output shaft of the conveying motor (6), a conveying screw (14) is fixedly provided on the conveying rotating rod (13), a connecting pipe (15) is connected between the mixing box (1) and the conveying seat (5), and a discharge port is provided at one end of the bottom of the conveying seat (5).
4. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 1, characterized in that: The stirring mechanism comprises a driving rod (16), the driving rod (16) is rotatably connected to the stirring box (1), the driving rod (16) is fixedly connected to the output shaft of the stirring motor (3), and the bottom end of the driving rod (16) is fixedly connected to a gear shaft (17).
5. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 4, characterized in that: Two transmission gears (27) are symmetrically meshed and connected to the gear shaft (17). The bottoms of the two transmission gears (27) are fixedly connected to a rotating rod (26). The outer walls of the two rotating rods (26) are fixedly provided with a plurality of stirring blades (28).
6. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 4, characterized in that: The transmission mechanism comprises a first bevel gear (18) fixedly connected to a driving rod (16); transmission rods (19) are rotatably connected to both sides of the top box (2); one end of each transmission rod (19) is fixedly connected to a second bevel gear (20); each of the two second bevel gears (20) is meshed with the first bevel gear (18); the other end of each transmission rod (19) is fixedly connected to a cam (21); a reset groove is provided on the inner wall of the inner tank (7) of the anaerobic reactor; reset springs (22) are fixedly connected in the two reset grooves; a reset block (23) is fixedly connected to the two reset springs (22); one side of each reset block (23) is fixedly connected to a support plate (25); and two rotating rods (26) are rotatably connected to the two support plates (25) respectively.
7. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 6, characterized in that: The two reset blocks (23) are respectively connected in a sliding manner to the two reset grooves, and the tops of the two reset blocks (23) are fixedly connected with a pressure rod (24) that fits with the two cams (21).
8. The straw and livestock and poultry manure collaborative anaerobic fermentation system according to claim 1, characterized in that: The front side of the mixing box (1) is provided with a first observation window (29) corresponding to the outer tank (8) of the anaerobic reactor, and the mixing box (1) is provided with a second observation window (30) corresponding to the inner tank (7) of the anaerobic reactor.