Anaerobic fermentation device for high-concentration organic waste liquid

Abstract

The utility model relates to environmental protection equipment technical field discloses a kind of high-concentration organic waste liquid anaerobic fermentation device, including fermentation tank and being located above marsh gas purification tank, communication pipe is equipped between the marsh gas purification tank with the fermentation tank, control valve is installed on the communication pipe;Stirring device is equipped in the fermentation tank, the bottom of the fermentation tank is equipped with high-temperature gas pipe, several high-temperature nozzles are equipped on the high-temperature gas pipe;Pre-filter screen, fine filter screen and activated carbon filter layer are sequentially equipped from bottom to top in the marsh gas purification tank, by setting the communication pipe between marsh gas purification tank and fermentation tank and control valve, the circulation of marsh gas can be flexibly controlled, improve the security of fermentation process;The stirring device set in fermentation tank can effectively mix waste liquid, improve anaerobic fermentation efficiency, promote the full contact of microorganism and waste liquid;High-temperature gas pipe and high-temperature nozzle set in the bottom of fermentation tank can uniformly heat waste liquid.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, specifically to an anaerobic fermentation device for high-concentration organic waste liquid. Background Technology

[0002] The treatment of high-concentration organic wastewater remains a significant and challenging issue in current industrial and environmental fields. Traditional treatment methods, such as direct discharge or simple treatment, often pollute the environment and waste recyclable resources in the wastewater. With increasing environmental awareness and the continuous development of resource recycling technologies, anaerobic fermentation technology, as an effective method for treating organic wastewater, has received widespread attention and application.

[0003] Anaerobic fermentation technology uses microorganisms to decompose organic matter in organic waste liquid into useful substances such as biogas under anaerobic conditions. This not only reduces the volume and renders the waste liquid harmless, but also recovers energy, resulting in significant economic and environmental benefits.

[0004] However, existing anaerobic fermentation devices still have some problems and shortcomings when treating high-concentration organic waste liquid. Traditional devices are not perfect in terms of biogas collection and purification, resulting in low biogas purity, containing more impurities and harmful gases, which affects the subsequent utilization of biogas. Utility Model Content

[0005] The purpose of this invention is to provide an anaerobic fermentation device for high-concentration organic waste liquid to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-concentration organic waste liquid anaerobic fermentation device, comprising a fermentation tank and a biogas purification tank disposed above it, wherein a connecting pipe is provided between the biogas purification tank and the fermentation tank, and a control valve is installed on the connecting pipe; a stirring device is provided inside the fermentation tank, and a high-temperature gas pipe is provided at the bottom of the fermentation tank, wherein a plurality of high-temperature resistant nozzles are provided on the high-temperature gas pipe; and a pre-filter, a fine filter, and an activated carbon filter layer are arranged sequentially from bottom to top inside the biogas purification tank.

[0007] Preferably, the fermenter is provided with a support frame at the bottom and multiple liquid outlets are provided on the bottom wall of the fermenter, and each liquid outlet is equipped with a liquid outlet control valve.

[0008] Preferably, the biogas purification tank is further provided with a water-absorbing layer, which is located above the activated carbon filter layer.

[0009] Preferably, the top of the biogas purification tank is connected to an exhaust pipe, and the exhaust pipe is equipped with a pressure control valve.

[0010] Preferably, the stirring device consists of a drive motor, a stirring shaft, and rectangular stirring blades; wherein the stirring shaft is longitudinally arranged inside the fermentation tank and is driven by the drive motor, and the rectangular stirring blades are arranged on the shaft of the stirring shaft.

[0011] Preferably, the number of rectangular stirring blades is 3 groups, the 3 groups of rectangular stirring blades are arranged longitudinally at equal intervals, the number of blades in each group of rectangular stirring blades is greater than 3, and they are arranged in a ring array around the axis of the stirring shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting a connecting pipe and a control valve between the biogas purification tank and the fermentation tank, the flow of biogas can be flexibly controlled, and the safety of the fermentation process can be improved. The stirring device installed inside the fermenter can effectively mix the waste liquid, improve the efficiency of anaerobic fermentation, and promote full contact between microorganisms and waste liquid; The high-temperature gas pipe and high-temperature resistant nozzle installed at the bottom of the fermenter can evenly heat the waste liquid, ensuring the stability of the fermentation temperature and thus improving the fermentation effect; The biogas purification tank is equipped with a pre-filter, a fine filter, and an activated carbon filter layer, which can purify biogas step by step, effectively removing impurities and harmful gases and improving the purity of biogas. The support frame design at the bottom of the fermenter enhances the stability of the device, while the multiple liquid outlets and liquid outlet control valves facilitate the discharge and collection of waste liquid. The water-absorbing layer added inside the biogas purification tank can further absorb the moisture in the biogas and improve the dryness of the biogas. The exhaust pipe and pressure control valve connected to the top of the biogas purification tank can automatically regulate the pressure inside the tank to prevent safety accidents caused by excessive pressure. The longitudinally arranged stirring shaft and rectangular stirring blades in the stirring device can form an effective stirring flow field and improve stirring efficiency; The number and arrangement of rectangular stirring blades increase the stirring area, making the waste liquid mix more evenly and further improving the fermentation effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the biogas purification tank; Figure 3 for Figure 1 A magnified structural diagram of point A1 in the middle.

[0014] In the diagram: 1. Fermentation tank; 2. Biogas purification tank; 3. Connecting pipe; 4. Control valve; 5. Stirring device; 6. High-temperature gas pipe; 7. High-temperature resistant nozzle; 8. Pre-filter; 9. Fine filter; 10. Activated carbon filter layer; 11. Support frame; 12. Liquid outlet; 13. Water absorption layer; 14. Exhaust pipe; 15. Pressure control valve; 5-1. Drive motor; 5-2. Stirring shaft; 5-3. Rectangular stirring blades. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-3 This utility model provides a technical solution: a high-concentration organic waste liquid anaerobic fermentation device, including a fermentation tank 1 and a biogas purification tank 2 located above it. A connecting pipe 3 is provided between the biogas purification tank 2 and the fermentation tank 1, and a control valve 4 is installed on the connecting pipe 3. A stirring device 5 is provided inside the fermentation tank 1, and a high-temperature gas pipe 6 is provided at the bottom of the fermentation tank 1. Several high-temperature resistant nozzles 7 are provided on the high-temperature gas pipe 6. A pre-filter 8, a fine filter 9 and an activated carbon filter layer 10 are arranged in sequence from bottom to top inside the biogas purification tank 2.

[0017] In the above embodiments, the core components of the high-concentration organic waste anaerobic fermentation device include a main fermentation tank 1 and a biogas purification tank 2 located above the fermentation tank. To achieve effective connection and gas transmission between the two, a connecting pipe 3 is specially installed between the biogas purification tank 2 and the fermentation tank 1. An adjustable control valve 4 is also installed on this connecting pipe 3 to precisely control gas flow. Inside the fermentation tank 1, a high-efficiency stirring device 5 is provided to ensure uniform mixing of materials during fermentation and improve fermentation efficiency. Furthermore, a high-temperature gas pipe 6 is designed at the bottom of the fermentation tank 1, with several high-temperature resistant nozzles 7 evenly distributed on it for introducing high-temperature gas to further increase the fermentation temperature. Inside the biogas purification tank 2, a multi-stage filtration system is employed, consisting of a pre-filter 8, a fine filter 9, and an activated carbon filter layer 10 arranged sequentially from bottom to top. This combined filtration design effectively removes impurities and harmful substances from the biogas, ensuring that the final emitted biogas meets purification standards.

[0018] Specifically, the fermenter 1 is provided with a support frame 11 at the bottom, and the fermenter 1 is provided with multiple liquid outlets 12 on the bottom wall, and each liquid outlet 12 is equipped with a liquid outlet control valve.

[0019] In this embodiment, the support frame 11 is made of stainless steel, which has high strength and corrosion resistance, effectively supporting the weight of the fermenter 1 and ensuring its stable operation. Multiple liquid outlets 12 are provided on the bottom wall of the fermenter 1, evenly distributed at the bottom to facilitate the discharge of waste liquid after fermentation. Each liquid outlet 12 is equipped with a discharge control valve, which can be independently adjusted to achieve precise control of waste liquid discharge, while also facilitating equipment maintenance and repair.

[0020] Specifically, the biogas purification tank 2 is also equipped with a water-absorbing layer 13, which is located above the activated carbon filter layer 10.

[0021] In this embodiment, the water-absorbing layer 13 is located above the activated carbon filter layer 10 and is used to absorb moisture in the biogas, preventing moisture from affecting the activated carbon filter layer 10. The water-absorbing layer 13 is made of water-absorbing resin or inorganic water-absorbing material, which has good water absorption performance and a long service life, effectively ensuring the dryness of the biogas and ensuring the smooth progress of subsequent processing.

[0022] Specifically, the top of the biogas purification tank 2 is connected to an exhaust pipe 14, and a pressure control valve 15 is installed on the exhaust pipe 14.

[0023] In this embodiment, the exhaust pipe 14 is made of corrosion-resistant material, capable of withstanding the erosion of acidic gases and other impurities in the biogas. A pressure control valve 15 is installed on the exhaust pipe 14, which automatically adjusts the exhaust volume according to pressure changes inside the biogas purification tank 2, ensuring that the internal pressure is maintained within a safe range and preventing equipment damage or gas leakage due to excessive pressure.

[0024] Specifically, the stirring device 5 consists of a drive motor 5-1, a stirring shaft 5-2, and rectangular stirring blades 5-3; wherein, the stirring shaft 5-2 is longitudinally arranged inside the fermentation tank 1 and is driven by the drive motor 5-1, and the rectangular stirring blades 5-3 are arranged on the shaft of the stirring shaft 5-2.

[0025] In this embodiment, the drive motor 5-1 is mounted on the top of the fermenter 1 and connected to the stirring shaft 5-2 via a coupling, providing power to the stirring device 5. The stirring shaft 5-2 is longitudinally positioned inside the fermenter 1, with its two ends fixed to the top and bottom of the fermenter 1 by bearings, ensuring the stability of the stirring shaft 5-2 during operation. Rectangular stirring blades 5-3 are mounted on the shaft of the stirring shaft 5-2 and are made of high-strength stainless steel, possessing excellent corrosion resistance and wear resistance, enabling long-term use in harsh environments with high concentrations of organic waste liquid.

[0026] Specifically, there are 3 sets of rectangular stirring blades 5-3, which are arranged longitudinally at equal intervals. Each set of rectangular stirring blades 5-3 has more than 3 blades and is arranged in a ring array around the axis of stirring shaft 5-2.

[0027] In this embodiment, this design ensures thorough mixing of materials during the stirring process, avoiding the formation of dead zones, thereby improving fermentation efficiency and quality. Simultaneously, the number and arrangement of the rectangular stirring blades 5-3 can be adjusted according to actual fermentation needs to accommodate different concentrations and types of organic waste liquid.

[0028] Working principle: When this utility model is in operation, the high-concentration organic waste liquid is first injected into the fermentation tank 1.

[0029] The stirring device 5 inside the fermenter 1 starts working, and the drive motor 5-1 drives the stirring shaft 5-2 to rotate, which in turn drives the rectangular stirring blades 5-3 to fully stir the waste liquid, ensuring that the organic matter in the waste liquid comes into full contact with the anaerobic bacteria and promoting the fermentation reaction.

[0030] During fermentation, organic matter decomposes under the action of anaerobic bacteria to produce biogas, the main components of which are methane and carbon dioxide.

[0031] The high-temperature gas pipe 6 at the bottom of the fermenter 1 releases high-temperature gas through the high-temperature resistant nozzle 7, which may be used for heating or to promote the fermentation reaction.

[0032] The biogas produced during fermentation enters the biogas purification tank 2 located above the fermentation tank 1 through the connecting pipe 3.

[0033] The biogas passes through a pre-filter 8, a fine filter 9, and an activated carbon filter layer 10 in the biogas purification tank 2 in sequence to remove impurities, particulate matter, and odorous gases, ensuring the purity of the biogas.

[0034] Meanwhile, the water-absorbing layer 13 is located above the activated carbon filter layer 10 and is used to absorb moisture in the biogas, further improving the quality of the biogas.

[0035] The purified biogas is discharged through the exhaust pipe 14 at the top of the biogas purification tank 2 for subsequent use, such as power generation or heating. The pressure control valve 15 on the exhaust pipe 14 is used to regulate the system pressure to ensure safe operation.

[0036] After fermentation is complete, the liquid outlet 12 at the bottom of fermenter 1 is opened through the liquid outlet control valve to discharge the treated waste liquid for subsequent treatment or recycling.

[0037] The entire device achieves efficient anaerobic fermentation treatment of high-concentration organic waste liquid through the coordinated operation of fermentation tank 1 and biogas purification tank 2, while purifying and utilizing the generated biogas, thus achieving the goals of resource utilization and environmental protection.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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 or an electrical 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 invention based on the specific circumstances.

[0039] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anaerobic fermentation device for high-concentration organic waste liquid, characterized in that: It includes a fermentation tank (1) and a biogas purification tank (2) located above it. A connecting pipe (3) is provided between the biogas purification tank (2) and the fermentation tank (1), and a control valve (4) is installed on the connecting pipe (3). The fermentation tank (1) is equipped with a stirring device (5), and a high-temperature gas pipe (6) is provided at the bottom of the fermentation tank (1). Several high-temperature resistant nozzles (7) are provided on the high-temperature gas pipe (6). The biogas purification tank (2) is provided with a pre-filter (8), a fine filter (9) and an activated carbon filter layer (10) from bottom to top.

2. The anaerobic fermentation device for high-concentration organic waste liquid according to claim 1, characterized in that: The fermenter (1) is provided with a support frame (11) at the bottom end, and the fermenter (1) is provided with multiple liquid outlets (12) on the bottom wall, and each liquid outlet (12) is equipped with a liquid outlet control valve.

3. The anaerobic fermentation device for high-concentration organic waste liquid according to claim 1, characterized in that: The biogas purification tank (2) is also provided with a water-absorbing layer (13), which is located above the activated carbon filter layer (10).

4. The anaerobic fermentation device for high-concentration organic waste liquid according to claim 3, characterized in that: The top of the biogas purification tank (2) is connected to an exhaust pipe (14), and a pressure control valve (15) is provided on the exhaust pipe (14).

5. The anaerobic fermentation device for high-concentration organic waste liquid according to claim 1, characterized in that: The stirring device (5) consists of a drive motor (5-1), a stirring shaft (5-2), and rectangular stirring blades (5-3); The stirring shaft (5-2) is longitudinally arranged inside the fermentation tank (1) and is driven by the drive motor (5-1). The rectangular stirring blade (5-3) is arranged on the shaft of the stirring shaft (5-2).

6. The anaerobic fermentation device for high-concentration organic waste liquid according to claim 5, characterized in that: The rectangular stirring blades (5-3) are arranged in three groups, with the three groups of rectangular stirring blades (5-3) arranged longitudinally at equal intervals. Each group of rectangular stirring blades (5-3) has more than three blades and is arranged in a ring array around the axis of the stirring shaft (5-2).

Images