Anaerobic digestion liquid manure aerobic fermentation device

Abstract

The utility model discloses a kind of biogas slurry fertilizer aerobic fermentors, involve biogas slurry processing technical field.Its structure includes flatbed cart and the fermentation tank, air pump and sewage pump installed on flatbed cart;S-shaped arrangement's aeration gas guide pipe is arranged in the bottom of fermentation tank, and aeration gas guide pipe one end is connected with air pump air outlet after being through fermentation tank;Aeration gas guide pipe is equipped with several aeration heads;One row of hanging rods is fixed between one relative inner wall of fermentation tank upper end portion;One row of fiber bundle fillings is installed on hanging rod.The utility model is combined by flatbed cart, fermentation tank, air pump and sewage pump to strengthen microbial decomposition, improve biogas slurry quality and safety, guarantee biogas tank stable operation, promote resource utilization and handle substandard biogas slurry in time, maintain biogas tank inner microbial environment balance, guarantee biogas continuous and stable generation;Equipment is flexible and efficient, and strong adaptability, and operation is simple and convenient, maintenance cost is low, effectively solve rural biogas slurry processing problem.

Description

Technical Field

[0001] This utility model belongs to the field of biogas slurry treatment technology, and in particular relates to an aerobic fermentation device for biogas slurry fertilizer. Background Technology

[0002] In rural areas, biogas digesters are widely used as an important renewable energy facility to treat organic waste and generate clean energy—biogas. However, with the increasing popularity and use of biogas digesters, the problem of substandard fermentation quality of biogas slurry has become increasingly prominent, becoming a key factor restricting the efficient operation of biogas digesters and the resource utilization of biogas slurry.

[0003] Biogas slurry, a byproduct of biogas fermentation, is rich in nutrients such as nitrogen, phosphorus, and potassium, as well as various trace elements, which are essential for plants, giving it high agricultural value. However, due to improper fermentation conditions, unreasonable raw material ratios, or insufficient fermentation time, biogas slurry often contains a large amount of undecomposed organic matter, pathogens, and harmful substances, leading to a decline in its quality. Direct application to farmland may cause crop diseases and pests, and even pollute the soil environment.

[0004] Traditional biogas slurry treatment methods mostly employ natural sedimentation or simple filtration. While these methods can remove some suspended solids, they cannot effectively decompose organic matter in the biogas slurry or kill pathogens, resulting in limited treatment effectiveness. Furthermore, natural sedimentation is a slow process, consuming land resources and is easily affected by external factors such as weather, making it difficult to meet the needs of large-scale biogas slurry treatment.

[0005] With the growing acceptance of the concept of sustainable agricultural development, improving the quality of biogas slurry fermentation and achieving its safe and efficient resource utilization has become an urgent issue in the rural energy and environmental sectors. Aerobic fermentation technology, as an effective method for treating organic waste, introduces oxygen into the fermentation system to promote the reproduction and metabolic activities of aerobic microorganisms, accelerating the decomposition and transformation of organic matter, thereby improving the quality and stability of fermentation products. However, existing aerobic fermentation equipment is mostly designed for large-scale sewage treatment plants or industrial organic waste treatment, resulting in complex structures and high costs, making it difficult to meet the dispersed, small-scale biogas slurry treatment needs of rural areas.

[0006] Therefore, developing a simple, easy-to-operate, low-cost aerobic fermenter for biogas slurry in rural areas is of great significance for improving the quality of biogas slurry fermentation, ensuring the normal operation of biogas digesters, and promoting the resource utilization of agricultural waste. This utility model is based on this background, aiming to provide a highly efficient aerobic fermenter for biogas slurry to solve the problems existing in the prior art and promote the sustainable development of the rural biogas industry. Utility Model Content

[0007] The purpose of this invention is to provide an aerobic fermentation device for biogas slurry fertilizer, which enhances microbial decomposition through fermentation tanks, air pumps, and sludge pumps, thus solving the problems of substandard biogas slurry treatment quality, bulky and difficult-to-move equipment, and complex operation and maintenance in existing biogas slurry treatment systems.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model relates to an aerobic fermentation device for biogas slurry fertilizer, comprising a flatbed trolley and a fermentation tank, an air pump, and a sludge pump mounted on the trolley; an S-shaped arrangement of aeration pipes is provided at the bottom of the fermentation tank, with one end of the aeration pipes passing through the fermentation tank and connected to the air outlet of the air pump; several aeration heads are installed on the aeration pipes; a row of hanging rods is fixed between opposite inner walls at the upper end of the fermentation tank; a row of fiber bundle packing is installed on the hanging rods; an upwardly inclined biogas slurry injection pipe is fixed through one side wall at the upper end of the fermentation tank; a vertically upward venting pipe is fixed through the middle of the biogas slurry injection pipe; a conveying pipe is installed at the output end of the sludge pump; the conveying pipe is connected to the upper end of the biogas slurry injection pipe; a discharge pipe is fixed through one side wall at the lower end of the fermentation tank; a ball valve is installed on the discharge pipe.

[0010] As a preferred embodiment of this utility model, the fermentation tank has a rectangular box structure; the upper end of the fermentation tank is provided with a threaded cover.

[0011] As a preferred embodiment of this invention, the bottom of the fermenter is provided with a bottom slope that slopes downward toward the discharge pipe.

[0012] As a preferred embodiment of this utility model, the flatbed trolley includes a horizontal support plate; the air pump is installed at the rear end of the horizontal support plate; the sewage pump is installed at the front end of the horizontal support plate; two directional small wheels are fixed at the bottom of the front end of the horizontal support plate; two self-locking universal wheels are fixed at the bottom of the rear end of the horizontal support plate; and a handrail is installed at the rear end of the horizontal support plate.

[0013] As a preferred embodiment of this utility model, the sewage pump extraction connector is equipped with a first steel wire corrugated hose; a filter cover is installed at the free end of the first steel wire corrugated hose.

[0014] As a preferred embodiment of this utility model, a second steel wire corrugated hose is installed on the discharge pipe.

[0015] As a preferred embodiment of this utility model, a winding frame is installed on the upper surface of the front end of the horizontal support plate; the winding frame includes a rectangular upright plate that is vertically fixed on the horizontal support plate; two pairs of L-shaped hanging rods facing away from each other are fixed on the front side of the rectangular upright plate.

[0016] This utility model has the following beneficial effects:

[0017] 1. This invention utilizes aerobic aeration to effectively decompose organic matter in biogas slurry and kill pathogens, significantly improving the fermentation quality of the biogas slurry and ensuring its safe application in farmland, avoiding damage to crops and the soil environment. It also promptly treats substandard biogas slurry, maintaining the balance of the microbial environment within the biogas digester and ensuring a continuous and stable production of biogas. The treated biogas slurry can be directly used as fertilizer, realizing the resource utilization of agricultural waste and reducing agricultural production costs.

[0018] 2. The flatbed trolley design of this utility model facilitates flexible movement and fixation of the equipment in complex rural terrain; the S-shaped aeration pipe and fiber bundle packing design improve aeration efficiency and microbial adhesion effect, accelerate the decomposition of organic matter, and adapt to the treatment needs of biogas digesters of different sizes.

[0019] 3. The threaded connection cover of this utility model facilitates internal cleaning, and the winding frame design simplifies hose management; the filter cover protects the sludge pump from damage by impurities, extends the service life of the equipment, and reduces overall maintenance costs.

[0020] 4. The fermenter of this utility model is equipped with a threaded top cover, which is convenient to open for internal cleaning and maintenance; the winding frame is reasonably designed to facilitate the storage and organization of hoses, reducing the complexity of equipment operation and maintenance.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0023] Figure 1 This is a schematic diagram of the structure of the biogas slurry fertilizer aerobic fermenter of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1-Flatbed trolley, 2-Fermentation tank, 3-Air pump, 4-Sewage pump, 5-Aeration guide pipe, 6-Aeration head, 7-Fiber bundle packing, 21-Hanging rod, 22-Biogas slurry injection pipe, 23-Aeration pipe, 41-Transportation pipe, 24-Discharge pipe, 25-Ball valve, 26-Top cover, 27-Bottom slope plate, 11-Horizontal support plate, 12-Directional wheels, 13-Self-locking casters, 14-Handrail, 8-First steel wire corrugated hose, 81-Filter cover, 9-Second steel wire corrugated hose, 10-Wrapping frame, 101-Rectangular upright plate, 102-L-shaped hanging rod. Detailed Implementation

[0026] 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 scope of protection of the present utility model. Specific Implementation Example 1:

[0028] Please see Figure 1 As shown, this utility model is an aerobic fermentation device for biogas slurry fertilizer, specifically designed to solve the problem of substandard fermentation quality of biogas slurry in rural biogas digesters. It ensures the normal operation of the biogas digester by extracting the biogas slurry and aerating it, while avoiding potential damage to crops from substandard biogas slurry. The fermentation device mainly includes a flatbed cart 1, a fermentation tank 2, an air pump 3, and a sludge pump 4 mounted on the flatbed cart 1.

[0029] The flatbed trolley 1 serves as the mobile base for the entire equipment and includes a horizontal support plate 11. Two directional wheels 12 are fixed to the bottom front of the horizontal support plate 11, and two self-locking casters 13 are fixed to the bottom rear, facilitating flexible movement and securing of the equipment. A handrail 14 is installed at the rear of the horizontal support plate 11 for easy pushing of the equipment by the operator.

[0030] Fermentation tank 2 has a rectangular box structure with a threaded top cover 26 for easy opening for internal cleaning, maintenance, and the addition of aerobic bacteria. Inside fermentation tank 2, at the bottom, are S-shaped aeration pipes 5, one end of which passes through fermentation tank 2 and connects to the air outlet of air pump 3, ensuring even distribution of oxygen throughout fermentation tank 2. Several aeration heads 6 are installed on the aeration pipes 5 to refine the oxygen supplied by air pump 3 into tiny bubbles, increasing the contact area between oxygen and biogas slurry and improving aerobic fermentation efficiency.

[0031] A row of hanging rods 21 is fixed between the inner walls of the upper end of the fermenter 2. A row of fiber bundle packing 7 is installed on the hanging rods 21. The fiber bundle packing 7 serves as a carrier for the attachment and growth of microorganisms, which can increase the surface area of ​​the biofilm, promote the metabolic activities of microorganisms, and improve the decomposition efficiency of organic matter.

[0032] An upward-sloping biogas slurry injection pipe 22 is fixedly installed through one side wall of the upper end of the fermentation tank 2, used to pump biogas slurry from the biogas digester into the fermentation tank 2. A vertically upward-sloping vent pipe 23 is fixedly installed through the middle of the biogas slurry injection pipe 22. During the biogas slurry injection process, oxygen is mixed into the fermentation tank 2. During the injection process, the top cover 26 is not fully tightened, allowing ventilation. After the injection is completed, the top cover 26 is tightened, and the vent pipe 23 ensures the balance of air pressure inside and outside the fermentation tank 2. A conveying pipe 41 is installed at the output end of the sludge pump 4. The conveying pipe 41 is connected to the upper end of the biogas slurry injection pipe 22 to realize the extraction and injection of biogas slurry.

[0033] The bottom of the fermentation tank 2 is equipped with a bottom slope 27 that slopes downwards towards the discharge pipe 24, facilitating the smooth discharge of biogas slurry after fermentation. A discharge pipe 24 is fixedly installed through one side wall at the lower end of the fermentation tank 2. A ball valve 25 is installed on the discharge pipe 24 to control the discharge volume and timing of biogas slurry. A second corrugated steel wire hose 9 is also installed on the discharge pipe 24 to facilitate long-distance transport and flexible discharge of biogas slurry.

[0034] Air pump 3 is installed at the rear end of horizontal support plate 11 and is responsible for supplying oxygen to fermentation tank 2 for aerobic fermentation. Sludge pump 4 is installed at the front end of horizontal support plate 11 and is connected to the biogas digester via a first steel wire corrugated hose 8 (with a filter cover 81 installed at the free end). It is used to extract substandard biogas slurry and transport it to fermentation tank 2 for treatment. The filter cover 81 effectively prevents impurities from entering sludge pump 4, ensuring stable operation of the equipment.

[0035] A winding rack 10 is installed on the upper front surface of the horizontal support plate 11 to store and organize the first corrugated steel wire hose 8 and the second corrugated steel wire hose 9, preventing the hoses from becoming tangled and affecting equipment operation and movement. The winding rack 10 includes a rectangular upright plate 101 vertically fixed on the horizontal support plate 11. Two pairs of opposing L-shaped hanging rods 102 are fixed on the front side of the rectangular upright plate 101 to facilitate the quick hanging and storage of the first corrugated steel wire hose 8 and the second corrugated steel wire hose 9.

[0036] Working Principle: In practical applications, the operator first moves the equipment to the side of the biogas digester using the handrail 14, inserts the first corrugated steel wire hose 8 (with filter cover 81) of the sludge pump 4 into the biogas digester, and starts the sludge pump 4 to pump substandard biogas slurry into the fermentation tank 2. Subsequently, the air pump 3 is started to introduce oxygen into the fermentation tank 2. The oxygen is refined into tiny bubbles through the aeration pipe 5 and aeration head 6, and evenly distributed in the biogas slurry, promoting the reproduction and metabolic activities of aerobic microorganisms, decomposing organic matter in the biogas slurry, and improving the quality of the biogas slurry. During the fermentation process, the fiber bundle packing 7 serves as a carrier for the attachment and growth of microorganisms, further enhancing the decomposition efficiency of organic matter. After fermentation is completed, the ball valve 25 is opened, and the qualified biogas slurry is discharged through the discharge pipe 24 and the second corrugated steel wire hose 9 for use in farmland fertilization or other resource utilization.

[0037] One specific application of this embodiment is in rural areas, addressing the problem of substandard biogas slurry fermentation quality. This invention utilizes an aerobic fermentation device for on-site treatment of the substandard biogas slurry. By extracting the substandard biogas slurry from the biogas digester and subjecting it to aerobic aeration, the organic matter content and pathogen count in the slurry are effectively reduced, improving its fertilizer efficiency and safety. The treated slurry can be directly used for farmland fertilization, promoting the resource utilization of agricultural waste and improving the rural environment.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 the present invention. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An aerobic fermentation device for biogas slurry fertilizer, characterized in that: Includes a flatbed trolley (1) and a fermenter (2), an air pump (3) and a sludge pump (4) installed on the flatbed trolley (1). The fermenter (2) is provided with an S-shaped aeration pipe (5) at the bottom, and one end of the aeration pipe (5) passes through the fermenter (2) and is connected to the air outlet of the air pump (3); a number of aeration heads (6) are installed on the aeration pipe (5). A row of hanging rods (21) is fixed between the inner walls of the upper end of the fermenter (2); a row of fiber bundle packing (7) is installed on the hanging rods (21). An inclined biogas slurry injection pipe (22) is fixed through one side wall of the upper end of the fermentation tank (2); a vertically upward venting pipe (23) is fixed through the middle of the biogas slurry injection pipe (22); a conveying pipe (41) is installed at the output end of the sewage pump (4); the conveying pipe (41) is connected to the upper end of the biogas slurry injection pipe (22); A discharge pipe (24) is fixed through one side wall at the lower end of the fermenter (2); a ball valve (25) is installed on the discharge pipe (24).

2. The aerobic fermentation device for biogas slurry fertilizer according to claim 1, characterized in that, The fermentation tank (2) has a rectangular box structure; the upper end of the fermentation tank (2) is provided with a threaded cover (26).

3. The aerobic fermentation device for biogas slurry fertilizer according to claim 1, characterized in that, The fermenter (2) is provided with a bottom slope plate (27) that slopes downward toward the discharge pipe (24).

4. The aerobic fermentation device for biogas slurry fertilizer according to claim 1, characterized in that, The flatbed trolley (1) includes a horizontal support plate (11); the air pump (3) is installed at the rear end of the horizontal support plate (11); the sewage pump (4) is installed at the front end of the horizontal support plate (11); two directional small wheels (12) are fixed at the bottom of the front end of the horizontal support plate (11); two self-locking universal wheels (13) are fixed at the bottom of the rear end of the horizontal support plate (11); and a handrail (14) is installed at the rear end of the horizontal support plate (11).

5. The aerobic fermentation device for biogas slurry fertilizer according to claim 4, characterized in that, The sludge pump (4) has a first steel wire corrugated hose (8) installed at its extraction connector; a filter cover (81) is installed at the free end of the first steel wire corrugated hose (8).

6. The aerobic fermentation device for biogas slurry fertilizer according to claim 5, characterized in that, A second steel wire corrugated hose (9) is installed on the discharge pipe (24).

7. The aerobic fermentation device for biogas slurry fertilizer according to claim 6, characterized in that, A winding frame (10) is installed on the upper front surface of the horizontal support plate (11); the winding frame (10) includes a rectangular upright plate (101) that is vertically fixed on the horizontal support plate (11); two pairs of opposing L-shaped hanging rods (102) are fixed on the front side of the rectangular upright plate (101).

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