Dry-method biogas fermentation discharging system
By installing a discharge pipe assembly and a buffer tank in the dry anaerobic fermenter, combined with the control of pneumatic valves, the problems of uneven discharge and overflow were solved, achieving multi-point uniform discharge and accurate metering discharge, thus improving the reliability and operational stability of the equipment.
Patent Information
- Application Number
- CN202422205866.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In the existing technology, the discharge method of dry anaerobic fermenters is prone to pump blockage, equipment wear, uneven discharge, and difficulty in controlling the discharge volume. In addition, gravity discharge is prone to overflow and inaccurate metering.
The design employs a discharge pipe assembly and a buffer tank, including a combination of first, second, and third discharge pipes and pneumatic valves, to achieve uniform discharge at multiple points and control the discharge rate through the buffer tank to prevent overflow.
This technology enables multi-point uniform discharge from dry anaerobic fermenters, ensuring accurate measurement of discharge volume, preventing overflow, and improving equipment lifespan and operational controllability.
Smart Images
Figure CN223534079U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a dry biogas fermentation discharge system, belonging to the field of anaerobic fermentation biogas production technology. Background Technology
[0002] my country generates a massive amount of agricultural solid waste annually, causing severe environmental pollution, while simultaneously facing a shortage of primary energy in rural areas. Applying biogas fermentation technology to treat organic solid waste can transform it into clean energy biogas and green bio-organic fertilizer, alleviating the energy shortage. Biogas and bio-fertilizer can create significant economic benefits for users, and the use of bio-organic fertilizer can also improve the quality of agricultural products, promoting increased production and income for farmers, resulting in substantial overall benefits.
[0003] Based on the total solids content (TS) of the material in the reactor, biogas fermentation technology can be divided into two types: wet fermentation (TS≤12%) and dry fermentation (TS≥20%). The raw materials can be various solid organic materials such as livestock and poultry manure, agricultural straw, and kitchen waste.
[0004] Currently, traditional discharge methods include gravity discharge and pump discharge. In pump discharge, due to the characteristics of the anaerobic fermentation material, the pump is easily clogged by fibers, and impurities such as sand and gravel in the material cause severe wear and tear on the equipment, resulting in a short pump lifespan. Furthermore, specialized pumps require non-standard manufacturing, increasing manufacturing and maintenance costs. Additionally, generally one pump can only correspond to one discharge port, which cannot meet the requirement of multiple points for uniform discharge in dry anaerobic fermentation biogas production processes. In gravity discharge, the anaerobic digester is relatively tall, and the fermentation process within the digester creates significant pressure. In existing anaerobic digesters, the discharge rate is high and difficult to control due to the large pressure difference when the valve is opened. When discharging slag from the bottom of the tank or through the circulation pipe, the mixing tank can be filled in just a few seconds. Because of the short time, it is difficult for operators to control the discharge volume, and the mixing tank is prone to overflow. When the valve malfunctions, it is also easy to cause material to overflow. Furthermore, the existing gravity discharge cannot achieve uniform discharge and cannot accurately measure the discharge volume. Utility Model Content
[0005] To address the aforementioned issues, this application proposes a dry biogas fermentation discharge system. By setting up discharge pipeline components and buffer tanks, it can achieve uniform discharge from multiple points in the anaerobic digester. On the other hand, it can ensure that the material discharged from the anaerobic digester does not overflow the mixing tank and can accurately measure the discharge volume.
[0006] According to one aspect of this application, a dry biogas fermentation discharge system is provided, including an anaerobic digester, a discharge pipeline assembly, a buffer tank, and a mixing tank. The discharge pipeline assembly connects the anaerobic digester and the buffer tank. The discharge pipeline assembly includes a first discharge pipeline, a second discharge pipeline, and a third discharge pipeline. The first discharge pipeline is located at the bottom of the anaerobic digester, the second discharge pipeline is located on the side of the anaerobic digester, and both the first and second discharge pipelines are connected to the third discharge pipeline. The third discharge pipeline is connected to the buffer tank.
[0007] Optionally, the buffer tank is provided with an automatic vent valve at the top and a drain valve at the bottom.
[0008] Optionally, the buffer tank is provided with a discharge pipe on its side, and the discharge pipe is connected to the mixing tank.
[0009] Optionally, the second discharge pipe includes several groups, the second discharge pipe is arranged around the circumference of the anaerobic fermenter, and the second discharge pipe is arranged on the same horizontal line.
[0010] Optionally, a first pneumatic valve is provided on the first discharge pipe, and the first pneumatic valve is located on the side of the first discharge pipe near the anaerobic fermenter.
[0011] Optionally, a second pneumatic valve is provided on the second discharge pipe, and the second pneumatic valve is located on the side of the second discharge pipe near the anaerobic fermenter.
[0012] Optionally, a third pneumatic valve is provided on the third discharge pipe, and the third pneumatic valve is located on the side of the third discharge pipe near the buffer tank.
[0013] Optionally, the connection point between the third discharge pipe and the buffer tank is higher than the connection point between the discharge pipe and the buffer tank.
[0014] Optionally, a fourth pneumatic valve is provided on the discharge pipe, and the fourth pneumatic valve is located on the side of the discharge pipe near the buffer tank.
[0015] Optionally, the second discharge pipe includes 8 sets.
[0016] Optionally, a fourth discharge pipe is provided between the third discharge pipe and the mixing tank, and a fifth pneumatic valve is provided on the fourth discharge pipe.
[0017] The beneficial effects that this application may produce include, but are not limited to:
[0018] 1. The dry biogas fermentation discharge system provided in this application, by setting up a discharge pipeline assembly and a buffer tank, can achieve multi-point uniform discharge from the anaerobic digester on the one hand, and ensure that the material discharged from the anaerobic digester will not overflow the mixing tank after filling it, while accurately measuring the discharge volume on the other hand.
[0019] 2. The dry biogas fermentation discharge system provided in this application discharges materials from the bottom and lower middle parts of the anaerobic digester by setting up a first discharge pipe and a second discharge pipe, respectively, to obtain materials in different fermentation states.
[0020] 3. The dry biogas fermentation discharge system provided in this application has several sets of second discharge pipes, which are arranged on the same horizontal line and along the circumference of the anaerobic digester to achieve uniform discharge from multiple points.
[0021] 4. The dry biogas fermentation discharge system provided in this application controls the smooth progress of the entire discharge process by setting a first pneumatic valve, a second pneumatic valve, a third pneumatic valve, and a fourth pneumatic valve. When discharging material, the first or second pneumatic valve is opened first, followed by the third pneumatic valve, and the material enters the buffer tank. When the buffer tank is full, the third pneumatic valve is closed and the fourth pneumatic valve is opened, and the material in the buffer tank is discharged into the mixing tank for production use. After the material in the buffer tank is discharged, the fourth pneumatic valve is closed and the third pneumatic valve is opened to fill the buffer tank. The above operation is repeated to achieve discharge without material overflow. Attached Figure Description
[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0023] Figure 1 This is a schematic cross-sectional view of a dry biogas fermentation discharge system according to an embodiment of this application;
[0024] Figure 2 This is a cross-sectional structural diagram of a dry biogas fermentation discharge system according to another embodiment of this application.
[0025] List of components and reference numerals:
[0026] 1. Anaerobic fermenter; 2. Buffer tank; 3. Mixing tank; 4. First discharge pipe; 5. Second discharge pipe; 6. Third discharge pipe; 7. Automatic exhaust valve; 8. Sewage valve; 9. Discharge pipe; 10. First pneumatic valve; 11. Second pneumatic valve; 12. Third pneumatic valve; 13. Fourth pneumatic valve; 14. Fourth discharge pipe; 15. Fifth pneumatic valve. Detailed Implementation
[0027] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.
[0028] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0029] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0030] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0033] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.
[0034] refer to Figures 1-2 The embodiments of this application disclose a dry biogas fermentation discharge system, including an anaerobic digester 1, a discharge pipeline assembly, a buffer tank 2, and a mixing tank 3. The discharge pipeline assembly connects the anaerobic digester 1 and the buffer tank 2. The discharge pipeline assembly includes a first discharge pipeline 4, a second discharge pipeline 5, and a third discharge pipeline 6. The first discharge pipeline 4 is located at the bottom of the anaerobic digester 1, and the second discharge pipeline 5 is located on the side of the anaerobic digester 1. Both the first discharge pipeline 4 and the second discharge pipeline 5 are connected to the third discharge pipeline 6, and the third discharge pipeline 6 is connected to the buffer tank 2.
[0035] Specifically, by setting up the discharge pipe assembly and buffer tank 2, on the one hand, the anaerobic fermenter 1 can be discharged uniformly from multiple points, and on the other hand, it can ensure that the material discharged from the anaerobic fermenter 1 will not overflow the mixing tank 3 after filling it, while accurately measuring the discharge amount.
[0036] Specifically, this application does not make specific limitations on the length and diameter of the first discharge pipe 4, the second discharge pipe 5 and the third discharge pipe 6, and those skilled in the art can make selections according to the actual situation.
[0037] In one embodiment, the top of the buffer tank 2 is provided with an automatic vent valve 7, and the bottom of the buffer tank 2 is provided with a drain valve 8.
[0038] Specifically, this application does not impose specific limitations on the size or shape of the buffer tank 2, and those skilled in the art can make choices based on the actual situation.
[0039] In one embodiment, the buffer tank 2 is provided with a discharge pipe 9 on its side, which is connected to the mixing tank 3.
[0040] Specifically, a discharge pipe 9 is installed to discharge the material in the buffer tank 2 into the mixing tank 3 for production use.
[0041] Specifically, this application does not make specific limitations on the length and diameter of the discharge pipe 9, and those skilled in the art can make the selection according to the actual situation.
[0042] In one implementation, the second discharge pipe 5 includes several groups, and the second discharge pipe 5 is arranged around the anaerobic fermenter 1, and the second discharge pipe 5 is arranged on the same horizontal line.
[0043] Specifically, several sets of the second discharge pipe 5 are set up circumferentially on the anaerobic fermenter 1 to achieve uniform discharge from multiple points.
[0044] Specifically, this application does not impose a specific limit on the number of second discharge pipes 5, and those skilled in the art can select according to the actual situation.
[0045] In one embodiment, a first pneumatic valve 10 is provided on the first discharge pipe 4, and the first pneumatic valve 10 is located on the side of the first discharge pipe 4 near the anaerobic fermenter 1.
[0046] In one embodiment, a second pneumatic valve 11 is provided on the second discharge pipe 5, and the second pneumatic valve 11 is located on the side of the second discharge pipe 5 near the anaerobic fermenter 1.
[0047] In one embodiment, a third pneumatic valve 12 is provided on the third discharge pipe 6, and the third pneumatic valve 12 is located on the side of the third discharge pipe 6 near the buffer tank 2.
[0048] Specifically, by setting a first pneumatic valve 10, a second pneumatic valve 11, and a third pneumatic valve 12, they can be controlled separately during the material discharge process to ensure smooth material discharge and prevent overflow.
[0049] In one implementation, the connection point between the third discharge pipe 6 and the buffer tank 2 is higher than the connection point between the discharge pipe 9 and the buffer tank 2.
[0050] Specifically, by defining the connection positions between the third discharge pipe 6 and the buffer tank 2, and between the discharge pipe 9 and the buffer tank 2, the feeding and discharging of the buffer tank 2 can be facilitated.
[0051] In one embodiment, a fourth pneumatic valve 13 is provided on the discharge pipe 9, and the fourth pneumatic valve 13 is located on the side of the discharge pipe 9 near the buffer tank 2.
[0052] Specifically, a fourth pneumatic valve 13 is set to control whether the discharge pipe 9 discharges material.
[0053] Specifically, the first pneumatic valve 10, the second pneumatic valve 11, the third pneumatic valve 12, and the fourth pneumatic valve 13 are all commercially available products.
[0054] In one implementation, the second discharge pipe 5 includes 8 sets.
[0055] As another implementation, a fourth discharge pipe 14 is provided between the third discharge pipe 6 and the mixing tank 3. A fifth pneumatic valve 15 is provided on the fourth discharge pipe 14. The fourth discharge pipe 14 is directly connected to the third discharge pipe 9 and the mixing tank 3, without passing through the buffer tank 2, so as to discharge materials when the pressure inside the anaerobic fermentation tank 1 is relatively low.
[0056] This application provides a dry biogas fermentation material discharge system, the working process of which is as follows: When discharging material, first open the first pneumatic valve 10 or the second pneumatic valve 11, then open the third pneumatic valve 12, and the material enters the buffer tank 2. When the buffer tank 2 is full, close the third pneumatic valve 12 and open the fourth pneumatic valve 13, and the material in the buffer tank 2 is discharged into the mixing tank 3 for production use. After the material in the buffer tank 2 is discharged, close the fourth pneumatic valve 13 and open the third pneumatic valve 12 to fill the buffer tank 2. Repeat the above operation to achieve material discharge without material overflow. When the pressure in the anaerobic fermentation tank 1 is low, the material discharge speed is slow. In this case, close the third pneumatic valve 12 and the fourth pneumatic valve 13, open the first pneumatic valve 10 or the second pneumatic valve 11, and then open the fifth pneumatic valve 15 to achieve material discharge. The dry biogas fermentation material discharge system provided by this application can adapt to the material discharge needs under various conditions.
[0057] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.
[0058] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A dry biogas fermentation discharge system, characterized in that, The system includes an anaerobic digester, a discharge pipeline assembly, a buffer tank, and a mixing tank. The discharge pipeline assembly connects the anaerobic digester and the buffer tank. The discharge pipeline assembly includes a first discharge pipeline, a second discharge pipeline, and a third discharge pipeline. The first discharge pipeline is located at the bottom of the anaerobic digester, the second discharge pipeline is located on the side of the anaerobic digester, and both the first and second discharge pipelines are connected to the third discharge pipeline. The third discharge pipeline is connected to the buffer tank. The first discharge pipe is equipped with a first pneumatic valve, which is located on the side of the first discharge pipe near the anaerobic digester. A second pneumatic valve is provided on the second discharge pipe, and the second pneumatic valve is located on the side of the second discharge pipe near the anaerobic fermenter; The third discharge pipe is equipped with a third pneumatic valve, which is located on the side of the third discharge pipe near the buffer tank. The buffer tank is provided with a discharge pipe on its side, and the discharge pipe is connected to the mixing tank; The discharge pipe is equipped with a fourth pneumatic valve, which is located on the side of the discharge pipe near the buffer tank.
2. The dry biogas fermentation discharge system according to claim 1, characterized in that, The buffer tank is equipped with an automatic vent valve at the top and a drain valve at the bottom.
3. The dry biogas fermentation discharge system according to claim 1, characterized in that, The second discharge pipe includes several sets, and the second discharge pipe is arranged around the circumference of the anaerobic fermenter, and the second discharge pipe is arranged on the same horizontal line.
4. The dry biogas fermentation discharge system according to claim 1, characterized in that, The connection point between the third discharge pipe and the buffer tank is higher than the connection point between the discharge pipe and the buffer tank.
5. A dry biogas fermentation discharge system according to claim 3, characterized in that, The second discharge pipe consists of 8 sets.