Livestock and poultry manure two-phase hydrolysis device
By setting up aerobic and anaerobic zones in the livestock and poultry manure hydrolysis device and using aerobic and anaerobic hydrolytic bacteria respectively, the problem of low gas production efficiency caused by ammonia poisoning during the anaerobic digestion of livestock and poultry manure was solved, achieving the effect of high-efficiency hydrolysis and low loss.
Patent Information
- Application Number
- CN202422541148.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-21
AI Technical Summary
In existing technologies, the conversion of nitrogen compounds into ammonia nitrogen during the anaerobic digestion of livestock and poultry manure leads to ammonia poisoning in microorganisms, which reduces gas production efficiency. Furthermore, aerobic hydrolysis has high efficiency but consumes a large amount of raw materials, while anaerobic hydrolysis has low efficiency but consumes less raw materials, making it difficult to treat efficiently.
A two-phase hydrolysis device for livestock and poultry manure is designed. The hydrolysis tank is divided into an aerobic zone and an anaerobic zone by a two-phase separator plate. Aerobic hydrolysis bacteria and anaerobic hydrolysis bacteria are used respectively. The livestock and poultry manure is transported by a shaftless screw conveyor and stirred by a stirring shaft and a stirring paddle. Oxygen is provided by microporous aeration pipes to achieve efficient pretreatment.
It improves the hydrolysis efficiency of livestock and poultry manure, reduces raw material loss, solves the ammonia poisoning problem, and improves gas production efficiency.
Smart Images
Figure CN223496345U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of hydrolysis devices, and in particular relates to a two-phase hydrolysis device for livestock and poultry manure. Background Technology
[0002] The rapid development of the livestock and poultry farming industry has met people's demand for nutrients such as meat, eggs, and milk, but it has also brought about the problem of livestock and poultry manure disposal. Specialized, large-scale, and intensive farming will be the main way of industrial operation in the livestock industry in the future, and large-scale farming will inevitably exacerbate the problem of livestock and poultry manure disposal.
[0003] Anaerobic digestion is a biological treatment method that uses the metabolic activities of microorganisms under anaerobic conditions to convert livestock and poultry manure into carbon dioxide and methane. Livestock and poultry manure itself contains a large amount of usable organic matter and is considered a high-energy-density anaerobic digestion raw material. However, livestock and poultry manure also contains abundant protein and nitrogen compounds such as urea and uric acid. In the anaerobic digestion system, these nitrogen compounds are converted into ammonia nitrogen, causing ammonia poisoning of microorganisms, thereby significantly reducing gas production efficiency.
[0004] To mitigate the effects of ammonia poisoning, denitrification is commonly employed to reduce the nitrogen compounds in livestock and poultry manure. This requires pre-treatment with hydrolysis to convert the nitrogen compounds into ammonia nitrogen, thereby improving the efficiency of subsequent denitrification processes. Research has found that livestock and poultry manure hydrolysis can be categorized into aerobic and anaerobic hydrolysis. Aerobic hydrolytic bacteria exhibit high hydrolysis efficiency but consume a large amount of raw materials, while anaerobic hydrolytic bacteria have lower efficiency but consume less raw materials.
[0005] By utilizing the characteristics of two-phase (aerobic + anaerobic) hydrolysis to pretreat livestock and poultry manure, the hydrolysis efficiency of the raw materials can be improved, and the energy loss in the livestock and poultry manure during this stage can be reduced.
[0006] Based on this, the development and design of a high-efficiency two-phase livestock and poultry manure hydrolysis pretreatment device is of great significance for the efficient conversion of nitrogen compounds in livestock and poultry manure. Utility Model Content
[0007] This utility model addresses the problems existing in the prior art by proposing the following technical solution:
[0008] A two-phase hydrolysis device for livestock and poultry manure includes a hydrolysis tank, a water-sealed tank for collecting gas generated in the anaerobic zone, a shaftless screw conveyor for conveying livestock and poultry manure, and a jacket installed on the outer wall of the hydrolysis tank. The interior of the hydrolysis tank is equipped with a two-phase partition plate.
[0009] The tank is divided into an aerobic zone and an anaerobic zone by a two-phase partition plate. Aerobic hydrolytic bacteria participate in the reaction in the aerobic zone, and anaerobic hydrolytic bacteria participate in the reaction in the anaerobic zone. Each feed of hydrolytic bacteria in the aerobic zone accounts for 2 / 3 of the total feed, and each feed of hydrolytic bacteria in the anaerobic zone accounts for 1 / 3 of the total feed.
[0010] As a preferred embodiment of the above technical solution, the hydrolysis tank is provided with an anaerobic zone exhaust port, an aerobic zone inlet for bacterial culture, an anaerobic zone inlet for bacterial culture, and an outlet.
[0011] The shaftless screw conveyor has a conveyor outlet, which is connected to the feed inlet above the aerobic zone.
[0012] As a preferred embodiment of the above technical solution, a baffle is provided at one-half of the hydrolysis tank.
[0013] The height of the baffle is half the diameter of the tank to prevent the material from forming channels in the anaerobic zone inside the tank.
[0014] As a preferred embodiment of the above technical solution, a stirring shaft is installed inside the hydrolysis tank, and a stirring paddle is mounted on the stirring shaft. The stirring paddle is positioned at a 45° angle in the aerobic zone, and is called the aerobic zone stirring paddle, which achieves the stirring and propulsion effect on the materials in the aerobic zone. The stirring paddle is positioned horizontally in the anaerobic zone, and is called the anaerobic zone stirring paddle, which achieves the stirring effect on the materials in the anaerobic zone. Both the anaerobic zone stirring paddle and the aerobic zone stirring paddle are mounted on the stirring shaft, the end of which is mounted on the output end of a geared motor, which is mounted on the side wall of the hydrolysis tank.
[0015] As a preferred embodiment of the above technical solution, a microporous aeration pipe is provided at the bottom of the aerobic zone inside the hydrolysis tank.
[0016] As a preferred embodiment of the above technical solution, the top of the hydrolysis tank is provided with an anaerobic zone exhaust port, and the pipe of the anaerobic zone exhaust port extends into the water seal tank.
[0017] The beneficial effects of this utility model are as follows:
[0018] In this application, a two-phase separator is used to divide the hydrolysis tank into an aerobic zone and an anaerobic zone. The different characteristics of aerobic and anaerobic hydrolytic bacteria are used to efficiently pretreat livestock and poultry manure, which not only improves the hydrolysis efficiency of the raw materials, but also reduces the loss at this stage. Attached Figure Description
[0019] Figure 1 The diagram shown is a frontal view of the internal structure of an embodiment of the present invention.
[0020] Legend:
[0021] 1. Hydrolysis tank; 2. Anaerobic zone exhaust port; 3. Stirring shaft; 4. Discharge port; 5. Anaerobic zone stirring paddle; 6. Baffle; 7. Aerobic zone stirring paddle; 8. Microporous aeration pipe; 9. Aerobic zone inoculum inlet; 10. Two-phase separator plate; 11. Anaerobic zone inoculum inlet; 12. Water seal tank; 13. Jacket; 14. Gear motor; 15. Conveyor inlet; 16. Shaftless screw conveyor; 17. Conveyor outlet. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0023] This application addresses the problem of difficult hydrolysis of livestock and poultry manure in the prior art by using a two-phase separator to divide the hydrolysis tank into an aerobic zone and an anaerobic zone. It utilizes the different characteristics of aerobic and anaerobic hydrolytic bacteria to perform efficient pretreatment of livestock and poultry manure, thereby improving the hydrolysis efficiency of the raw materials and reducing losses at this stage.
[0024] like Figure 1 As shown in the embodiment of this utility model, the two-phase hydrolysis device for livestock and poultry manure includes a hydrolysis tank 1, a water-sealed tank 12 for collecting gas generated in the anaerobic zone, a shaftless screw conveyor 16 for conveying livestock and poultry manure, and a jacket 13 installed on the outer wall of the hydrolysis tank 1. The hydrolysis tank 1 is equipped with a two-phase partition plate 10. The two-phase partition plate 10 divides the hydrolysis tank 1 into an anaerobic zone and an aerobic zone. It is worth noting that the aerobic zone has an open design at the top, and the volume ratio of the aerobic zone to the anaerobic zone is (0.5-1.5):2, ensuring that the residence time of livestock and poultry manure in the anaerobic zone is longer than that in the aerobic zone. The characteristics of aerobic and anaerobic hydrolytic bacteria are used to improve the hydrolysis efficiency of livestock and poultry manure, thereby solving the problem of difficult hydrolysis of livestock and poultry manure.
[0025] like Figure 1As shown, the hydrolysis tank 1 is equipped with an anaerobic zone exhaust port 2, an aerobic zone inoculum inlet 9, an anaerobic zone inoculum inlet 11, and an outlet 4; a shaftless screw conveyor 16 has a conveyor outlet 17, which is connected to the inlet above the aerobic zone; a baffle 6 is installed at half the length of the hydrolysis tank 1; the height of the baffle 6 is half the diameter of the hydrolysis tank 1, to prevent the aerobic zone material from forming channels after reaching the anaerobic zone, thus causing the aerobic zone material to be directly discharged from the outlet after reaching the anaerobic zone under the action of the stirring shaft; a stirring shaft 3 is installed inside the hydrolysis tank 1, and a stirring paddle is installed on the stirring shaft 3. The stirring paddle is placed at 45° in the aerobic zone and is called the aerobic zone stirring paddle 7, and placed horizontally in the anaerobic zone and is called the anaerobic zone stirring paddle 5. The anaerobic zone stirring paddle 5 and the aerobic zone stirring paddle 7 are connected. All stirring paddles 7 are mounted on stirring shaft 3. The end of stirring shaft 3 is mounted on the output end of geared motor 14, which is mounted on the side wall of hydrolysis tank 1. The geared motor 14 drives stirring shaft 3 to rotate and stir anaerobic stirring paddles 5 in hydrolysis tank 1. While ensuring stirring efficiency, aerobic stirring paddles also transport aerobic materials to anaerobic zone. Microporous aeration pipes 8 are provided at the bottom of aerobic zone in hydrolysis tank 1. Microporous aeration pipes 8 provide oxygen for aerobic hydrolysis bacteria to ensure their normal growth. Anaerobic zone exhaust port 2 is opened at the top of hydrolysis tank 1, and the pipe of anaerobic zone exhaust port 2 extends into water seal tank 12. This is used to collect the gas generated during anaerobic hydrolysis to prevent the gas from escaping into the air and causing pollution.
[0026] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A two-phase hydrolysis device for livestock and poultry manure, comprising a hydrolysis tank (1), a water-sealed tank (12) for collecting gas generated in the anaerobic zone, a shaftless screw conveyor (16) for conveying livestock and poultry manure, and a jacket (13) installed on the outer wall of the hydrolysis tank (1), characterized in that: The hydrolysis tank (1) is equipped with a two-phase partition plate (10). The hydrolysis tank (1) is provided with an anaerobic zone exhaust port (2), an aerobic zone inlet for bacteria (9), an anaerobic zone inlet for bacteria (11), and an outlet (4). The shaftless screw conveyor (16) is provided with a conveyor outlet (17), and the conveyor outlet (17) is connected to the feed inlet above the aerobic zone; The hydrolysis tank (1) is equipped with a stirring shaft (3) and a stirring paddle. The stirring paddle is placed at 45° in the aerobic zone and is called the aerobic zone stirring paddle (7). The stirring paddle is placed horizontally in the anaerobic zone and is called the anaerobic zone stirring paddle (5). The anaerobic zone stirring paddle (5) and the aerobic zone stirring paddle (7) are both installed on the stirring shaft (3). The end of the stirring shaft (3) is installed at the output end of the geared motor (14). The geared motor (14) is installed on the side wall of the hydrolysis tank (1).
2. The two-phase hydrolysis device for livestock and poultry manure according to claim 1, characterized in that, A baffle (6) is provided at one half of the hydrolysis tank (1).
3. The two-phase hydrolysis device for livestock and poultry manure according to claim 1, characterized in that, A microporous aeration pipe (8) is installed at the bottom of the aerobic zone inside the hydrolysis tank (1).
4. The two-phase hydrolysis device for livestock and poultry manure according to claim 1, characterized in that, The top of the hydrolysis tank (1) is provided with an anaerobic zone exhaust port (2), and the pipe of the anaerobic zone exhaust port (2) extends into the water seal tank (12).