Aerobic fermentation bin device combining nitrogen-containing gas control and nitrogen fixation

Abstract

The utility model relates to the technical field of aerobic fermentation equipment, in particular to an aerobic fermentation bin device combining nitrogen-containing gas control and nitrogen fixation, which comprises a support plate, the lower end of the support plate is fixedly connected with a plurality of support legs, and the upper end of the support plate is sequentially provided with a fermentation tank and a gas storage barrel at intervals from left to right. A gas conveying pipe is communicated between the fermentation tank and the gas storage barrel, and a sealing cover is arranged at the upper end of the fermentation tank. The adjusting assembly arranged on the fermentation tank comprises the temperature sensor, the heating device and the cooling device, so that the fermentation temperature can be accurately controlled to be about 55 DEG C, the nitrous oxide is high in volatility, and the volatilization of the nitrous oxide can be influenced when the temperature is too high or too low; the temperature is stabilized, so that the loss of gaseous nitrogen caused by excessive volatilization of nitrous oxide can be reduced, effective control on nitrogen-containing gas is realized, and meanwhile, the stirring assembly can be used for stirring fermentation materials, so that the fermentation is more sufficient.

Description

Technical Field

[0001] This utility model relates to the technical field of aerobic fermentation equipment, specifically to an aerobic fermentation chamber device that combines nitrogen-containing gaseous substance control and nitrogen fixation. Background Technology

[0002] In aerobic fermentation, nitrous oxide, as an important nitrogen-containing gaseous compound, is highly volatile and poses certain environmental hazards. Furthermore, excessively high or low temperatures can affect nitrous oxide volatilization, consequently impacting fermentation efficiency and nitrogen conversion and fixation. Traditional aerobic fermentation chambers suffer from insufficient precision in temperature control, struggling to maintain a stable fermentation temperature around 55 degrees Celsius. This leads to uncontrollable nitrous oxide volatilization and significant losses of gaseous nitrogen. In addition, existing devices lack reasonable design and effective coordination in promoting the conversion of nitrate nitrogen to ammonia nitrogen or ammonium salts and in adding ammonia-reducing microbial agents, failing to fully achieve nitrogen fixation. This results in low nitrogen nutrient content in the fermentation products, poor fertilizer efficiency, and an inability to meet the demands of modern agriculture for high-efficiency organic fertilizers. Therefore, there is an urgent need to design an aerobic fermentation chamber device that can effectively control nitrogen-containing gaseous compounds and achieve nitrogen fixation. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an aerobic fermentation chamber device that combines nitrogen gaseous substance control and nitrogen fixation, which can effectively solve the problem that the existing technology cannot stabilize the fermentation temperature at about 55 degrees Celsius, resulting in uncontrollable volatilization of nitrous oxide and a large loss of gaseous nitrogen.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides an aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation, including a support plate. Multiple support legs are fixedly connected to the lower end of the support plate. Fermentation tanks and gas storage tanks are arranged sequentially from left to right on the upper end of the support plate. A gas supply pipe connects the fermentation tanks and gas storage tanks. A sealing cover is provided at the upper end of the fermentation tank. A feed pipe is provided on the sealing cover. A discharge pipe is provided on the bottom wall of the fermentation tank. A stirring assembly is provided on the sealing cover. An adjustment assembly is also provided on the fermentation tank.

[0006] The adjustment assembly includes a second rotary motor fixedly installed at the lower end of the support plate. The output end of the second rotary motor is coaxially fixedly connected to a threaded rod. The rod body is threadedly sleeved with a lifting plate. Two lifting rods are symmetrically fixedly connected to the upper end of the lifting plate. The support plate and the fermentation tank have two through holes, and the two lifting rods pass through the two through holes respectively. The upper ends of the two lifting rods are fixedly connected to a cleaning ring. A temperature sensor, a heating device, and a cooling device are respectively provided on the lower surface of the cleaning ring.

[0007] According to the above-mentioned aerobic fermentation chamber device for combined control of nitrogen-containing gaseous substances and nitrogen fixation, a one-way valve is installed inside the gas delivery pipe.

[0008] According to the above-mentioned aerobic fermentation chamber device for combined control of nitrogen-containing gaseous substances and nitrogen fixation, the inner bottom wall of the fermentation tank is provided with an annular groove, and the shape and size of the annular groove are adapted to the cleaning ring.

[0009] According to the above-mentioned aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation, the stirring assembly includes two gears symmetrically rotatably connected to the upper end of the sealing cover, and the two gears mesh with each other. The lower ends of the two gears are coaxially fixedly connected to a stirring shaft. Multiple stirring plates are fixedly connected to the shaft body of the stirring shaft. An L-shaped mounting plate is fixedly connected to the upper end of the sealing cover. A first rotary motor is fixedly mounted on the upper end of the L-shaped mounting plate, and the output end of the first rotary motor is coaxially fixedly connected to one of the gears.

[0010] According to the above-mentioned aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation, both the feed pipe and the discharge pipe are equipped with solenoid valves.

[0011] According to the above-mentioned aerobic fermentation chamber device for combined control of nitrogen-containing gaseous substances and nitrogen fixation, two positioning grooves are symmetrically opened at the upper end of the fermentation tank, and two positioning blocks that are symmetrically fixedly connected to the lower end of the sealing cover and interlock with the positioning grooves.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0013] The regulating components on the fermenter include a temperature sensor, a heating device, and a cooling device, which can precisely control the fermentation temperature at around 55 degrees Celsius. Because nitrous oxide is highly volatile, and both excessively high and low temperatures will affect its volatilization, stabilizing the temperature at this level can reduce the loss of gaseous nitrogen caused by excessive volatilization of nitrous oxide, thus achieving effective control of nitrogen-containing gaseous substances. At the same time, the stirring component can stir the fermentation material to make its fermentation more complete. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of the aerobic fermentation chamber device for the combined control of nitrogen-containing gaseous substances and nitrogen fixation proposed in this utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the internal structure of the fermentation tank;

[0017] Figure 3 This is a schematic diagram of the stirring component in an aerobic fermentation chamber device for combined nitrogen gaseous substance control and nitrogen fixation proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the regulating component in an aerobic fermentation chamber device that combines nitrogen gaseous substance control and nitrogen fixation, as proposed in this utility model.

[0019] Reference numerals: 1. Support plate; 2. Support leg; 3. Fermentation tank; 4. Gas storage tank; 5. Gas supply pipe; 6. Feed pipe; 7. Discharge pipe; 8. Sealing cover; 9. Gear; 10. Stirring shaft; 11. Stirring plate; 12. L-shaped mounting plate; 13. First rotary motor; 14. Annular groove; 15. Through hole; 16. Cleaning ring; 161. Temperature sensor; 162. Heating device; 163. Cooling device; 17. Lifting rod; 18. Second rotary motor; 19. Threaded rod; 20. Lifting plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Example: Refer to Figures 1 to 4An aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation includes a support plate 1. Multiple support legs 2 are fixedly connected to the lower end of the support plate 1. Fermentation tanks 3 and gas storage tanks 4 are arranged sequentially from left to right on the upper end of the support plate 1. A gas supply pipe 5 connects the fermentation tanks 3 and the gas storage tanks 4. A one-way valve is installed inside the gas supply pipe 5.

[0023] The upper end of the fermentation tank 3 is provided with a sealing cover 8. Two positioning grooves are symmetrically opened on the upper end of the fermentation tank 3. Two positioning blocks that are symmetrically fixedly connected to the lower end of the sealing cover 8 and interlock with the positioning grooves are connected. When the sealing cover 8 is closed, the positioning blocks are aligned with the positioning grooves to achieve positioning and installation of the sealing cover 8 and ensure the stability of the sealing cover 8.

[0024] A feed pipe 6 is provided on the sealing cover 8, and a discharge pipe 7 is provided on the bottom wall of the fermentation tank 3. Both the feed pipe 6 and the discharge pipe 7 are equipped with solenoid valves. The solenoid valves control the connection between the feed pipe 6 and the discharge pipe 7 and the fermentation tank 3 during feeding and discharging, so as to ensure the airtightness of the fermentation tank 3 during fermentation.

[0025] The sealing cover 8 is equipped with a stirring assembly. Specifically, the stirring assembly includes two gears 9 that are symmetrically rotatably connected to the upper end of the sealing cover 8 and the two gears 9 are meshed. The lower ends of the two gears 9 are coaxially fixedly connected to a stirring shaft 10. Multiple stirring plates 11 are fixedly connected to the shaft body of the stirring shaft 10. An L-shaped mounting plate 12 is fixedly connected to the upper end of the sealing cover 8, and a first rotary motor 13 is fixedly mounted on the upper end of the L-shaped mounting plate 12.

[0026] The fermenter 3 is also equipped with an adjustment component. Specifically, the adjustment component includes a second rotary motor 18 fixedly installed at the lower end of the support plate 1. The output end of the second rotary motor 18 is coaxially fixedly connected to a threaded rod 19. The rod body of the threaded rod 19 is threadedly sleeved with a lifting plate 20. Two lifting rods 17 are symmetrically fixedly connected to the upper end of the lifting plate 20. The support plate 1 and the fermenter 3 have two through holes 15, and the two lifting rods 17 are respectively set through the two through holes 15. The upper ends of the two lifting rods 17 are fixedly connected to a cleaning ring 16. The inner bottom wall of the fermenter 3 has an annular groove 14, and the shape and size of the annular groove 14 are adapted to the cleaning ring 16.

[0027] It should be noted that:

[0028] The scientific basis for the 1.55℃ constant temperature control is that during the fermentation process, key enzymes related to nitrogen metabolism, such as urease and nitrate reductase, have the highest activity at 55℃, which can promote the conversion of nitrate nitrogen to ammonia nitrogen and reduce the formation of N2O precursor substances. Studies have shown that the N2O volatilization rate follows a "bell curve" in the 45-60℃ range, with the lowest volatilization rate at 55℃ (42% lower than the traditional 60℃ process). By real-time monitoring with a temperature sensor and dynamic adjustment with heating or cooling devices, temperature fluctuations can be controlled within ±0.5℃, achieving a 35%-40% reduction in N2O volatilization.

[0029] 2. During fermentation, the stirring components (double gear meshing drive double stirring shafts, speed adjustable from 0-80 r / min) ensure thorough mixing of materials, creating an aerobic microenvironment. By controlling dissolved oxygen (2-4 mg / L) and pH (6.5-7.5), denitrification to generate N2O is inhibited, and nitrate nitrogen (NO3⁻) is guided to be converted into ammonia nitrogen (NH4⁺) through the assimilation and reduction pathway, ultimately forming stable ammonium salt compounds (such as NH4Cl, (NH4)2SO4). The plant absorption rate of ammonium salts is 20%-30% higher than that of nitrate nitrogen, and it is not easily lost with water, significantly improving the fertilizer efficiency of fermentation products.

[0030] 3. Heating period (0-24h): The temperature rises from room temperature to 55℃. The heating device is started, and the stirring speed is set to 50r / min to promote the rapid reproduction of microorganisms, decompose easily decomposable organic matter (such as sugars and proteins), and release ammonia nitrogen.

[0031] High-temperature period (24-72h): Maintain a constant temperature of 55℃, reduce the stirring speed to 30r / min, focus on promoting the decomposition of cellulose and hemicellulose, and inhibit ammonia volatilization by using ammonia-reducing bacteria, achieving a nitrate nitrogen conversion rate of 65%-70%;

[0032] Cooling period (72-96h): Turn off the heating device and allow it to cool naturally to below 40℃ to form a stable composted product rich in humic acid, amino acids and ammonium nitrogen. Before discharge, start the cleaning ring to scrape off the residual material on the tank wall.

[0033] The operating principle of this utility model is as follows:

[0034] Open the solenoid valve on the feed pipe 6 to allow the nitrogen-containing gaseous substance to be fermented and related materials to enter the fermentation tank 3. After feeding is complete, close the solenoid valve to ensure the airtightness of the fermentation tank 3 during fermentation. After fermentation, open the solenoid valve on the discharge pipe 7 to discharge the fermentation product. Start the first rotary motor 13, and the output end of the first rotary motor 13 drives the gear 9 connected to it on the same shaft to rotate. Since the two gears 9 mesh with each other, they will drive the other gear 9 to rotate synchronously. The stirring shaft 10 at the lower end of the two gears 9 will rotate accordingly. Multiple stirring plates 11 fixedly connected to the stirring shaft 10 will stir the material in the fermentation tank 3 to make the material mix evenly and accelerate the fermentation process. The temperature sensor 161 monitors the temperature in the fermentation tank 3 in real time. When the temperature is below 55 degrees Celsius, the heating device 162 will be activated to raise the temperature; when the temperature is above 55 degrees Celsius, the cooling device 163 will be activated to lower the temperature. If cleaning of fermentation tank 3 is required, the second rotary motor 18 is started. The second rotary motor 18 drives the threaded rod 19 to rotate. The lifting plate 20, which is threaded onto the body of the threaded rod 19, rises along the threaded rod 19. Two lifting rods 17, symmetrically fixedly connected to the upper end of the lifting plate 20, pass through the through hole 15 opened on the support plate 1 and the fermentation tank 3, driving the cleaning ring 16 to rise along the inner circumferential wall of the fermentation tank 3. The cleaning ring 16 cleans away the debris adhering to the inner circumferential wall of the fermentation tank 3. The gas generated during fermentation flows to the gas storage tank 4 through the gas supply pipe 5. The one-way valve in the gas supply pipe 5 ensures that the gas can only flow from the fermentation tank 3 to the gas storage tank 4, preventing gas backflow. During fermentation, the solid material converts nitrate nitrogen into ammonia nitrogen or ammonia salt compounds. At the same time, ammonia-reducing functional bacteria are added to increase the nitrogen nutrient content in the fermentation product, thereby achieving nitrogen fixation.

[0035] This device is suitable for the resource-based treatment of agricultural waste (such as livestock and poultry manure, crop straw), food processing waste, etc., and can produce bio-organic fertilizer with high nitrogen content (total nitrogen ≥ 4%). According to calculations, processing 1 ton of livestock and poultry manure can reduce N2O emissions by about 0.8 kg (equivalent to 238 kg CO2 equivalent), while increasing nitrogen nutrient recovery by about 30 kg, thus achieving both environmental and economic benefits and meeting the needs of modern agricultural green development.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation, characterized in that, Includes a support plate (1), the lower end of which is fixedly connected to multiple support legs (2), the upper end of which is arranged from left to right with a fermentation tank (3) and a gas storage tank (4), the fermentation tank (3) and the gas storage tank (4) are connected by a gas supply pipe (5), the upper end of the fermentation tank (3) is provided with a sealing cover (8), the sealing cover (8) is provided with a feed pipe (6), the bottom wall of the fermentation tank (3) is provided with a discharge pipe (7), the sealing cover (8) is provided with a stirring assembly, and the fermentation tank (3) is also provided with an adjustment assembly; The adjustment assembly includes a second rotary motor (18) fixedly installed at the lower end of the support plate (1). The output end of the second rotary motor (18) is coaxially fixedly connected to a threaded rod (19). The rod body of the threaded rod (19) is threadedly sleeved with a lifting plate (20). The upper end of the lifting plate (20) is symmetrically fixedly connected to two lifting rods (17). The support plate (1) and the fermentation tank (3) have two through holes (15) opened together, and the two lifting rods (17) are respectively set through the two through holes (15). The upper ends of the two lifting rods (17) are fixedly connected to a cleaning ring (16). The lower surface of the cleaning ring (16) is respectively provided with a temperature sensor (161), a heating device (162) and a cooling device (163).

2. The aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation according to claim 1, characterized in that, A one-way valve is installed inside the gas pipeline (5).

3. The aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation according to claim 1, characterized in that, The fermenter (3) has an annular groove (14) on its inner bottom wall, and the shape and size of the annular groove (14) are adapted to the cleaning ring (16).

4. The aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation according to claim 1, characterized in that, The stirring assembly includes two gears (9) symmetrically rotatably connected to the upper end of the sealing cover (8), and the two gears (9) mesh with each other. The lower ends of the two gears (9) are coaxially fixedly connected to a stirring shaft (10). The shaft body of the stirring shaft (10) is fixedly connected to multiple stirring plates (11). The upper end of the sealing cover (8) is fixedly connected to an L-shaped mounting plate (12). The upper end of the L-shaped mounting plate (12) is fixedly mounted with a first rotary motor (13), and the output end of the first rotary motor (13) is coaxially fixedly connected to one of the gears (9).

5. The aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation according to claim 1, characterized in that, Both the feed pipe (6) and the discharge pipe (7) are equipped with solenoid valves.

6. The aerobic fermentation chamber device for combined control of nitrogen-containing gaseous matter and nitrogen fixation according to claim 1, characterized in that, The fermenter (3) has two symmetrically positioned grooves at its upper end, and the sealing cover (8) has two symmetrically fixedly connected positioning blocks that are inserted into the positioning grooves at its lower end.

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