Organic fertilizer production device with modular biogas fermentation unit

Abstract

The utility model relates to organic waste resource utilization technical field, specifically disclose a kind of organic fertilizer production device with modular biogas fermentation unit, including multiple identical modular biogas fermentation tank, the top of multiple modular biogas fermentation tank is provided with feed inlet and biogas outlet, bottom is provided with residue discharge port, by modular fermentation tank design and parallel connection structure, the flexibility and expandability of device are significantly improved, user can be flexibly configured scale according to actual demand, reduce initial investment and expansion difficulty and cost, standardization module facilitates factory production and rapid deployment, shorten construction cycle;Independent tank body design cooperates valve control, realize the independent operation and maintenance of single unit, without overall shutdown, greatly improve the reliability and maintainability of system continuous operation, effectively overcome the deficiency of traditional large-scale biogas engineering in flexibility, maintainability, standardization and with downstream convergence etc.

Description

Technical Field

[0001] This utility model relates to the field of organic waste resource utilization technology, and specifically discloses an organic fertilizer production device with a modular biogas fermentation unit. Background Technology

[0002] With population growth and the intensive development of agricultural production, livestock and poultry farming, food processing, and urban life have generated a large amount of organic waste (such as livestock and poultry manure, kitchen waste, and crop straw). If these wastes are not properly treated, they can easily cause environmental pollution (eutrophication of water bodies, soil degradation, emission of foul odors, and the release of the greenhouse gas methane) and the risk of disease transmission. At the same time, agricultural production has an increasing demand for efficient and environmentally friendly fertilizers. Anaerobic digestion of biogas, as a mature biomass energy conversion method, can convert organic waste into clean energy—biogas (mainly composed of methane), and produce nutrient-rich biogas residue and biogas slurry. After proper treatment, biogas residue and biogas slurry can be used as high-quality organic fertilizers or soil conditioners, effectively improving soil structure, increasing fertility, and reducing reliance on chemical fertilizers. Therefore, developing a resource utilization system integrating biogas production and organic fertilizer processing is of great significance for achieving the reduction, harmlessness, and resource utilization of organic waste, promoting circular agriculture, and sustainable development.

[0003] Currently, most common biogas projects use large underground or above-ground concrete anaerobic digesters (such as CSTR, USR, etc.) as the core fermentation unit. Although the technology is mature, these devices have also revealed many problems in practical applications: Poor flexibility, limited scalability, large individual tank size, long construction period, and high investment cost. Once built, its processing capacity is basically fixed, making it difficult to flexibly adjust or expand according to changes in raw material supply or market demand. For users with large fluctuations in waste generation or small initial scale with plans to expand later, the investment risk is high.

[0004] Large-scale equipment produces a large volume of biogas residue and biogas slurry, and subsequent organic fertilizer production processes such as solid-liquid separation, aerobic composting, drying, and granulation often require complex conveying pipelines, large storage ponds (tanks), and dedicated treatment sites, which increases the complexity of the system and the area occupied, as well as the energy consumption and the risk of secondary pollution.

[0005] Maintenance is difficult and affects continuous operation. Once a large-scale single fermentation unit malfunctions internally (such as agitator damage, pipe blockage, or damage to the anti-corrosion layer) or requires regular maintenance (such as slag removal or component replacement), the entire system usually needs to be shut down and the tank emptied, resulting in a long-term shutdown of the entire production line and affecting the continuity of biogas supply and organic fertilizer production.

[0006] The low level of standardization means that traditional equipment is mostly built on-site with a low degree of standardization and modularization, making it difficult to achieve mass production in factories. This results in construction quality being greatly affected by on-site conditions, long construction cycles, and difficulty in controlling costs, which is not conducive to rapid promotion and deployment.

[0007] The entire system's processing capacity depends on a single large piece of equipment. If that equipment malfunctions, the entire resource utilization system will be completely paralyzed. Summary of the Invention

[0008] This utility model proposes an organic fertilizer production device with a modular biogas fermentation unit. Through the modular fermentation tank design and parallel connection structure, the device's flexibility and scalability are significantly improved. Users can flexibly configure the scale according to actual needs, reducing initial investment and expansion difficulties and costs. It effectively overcomes the shortcomings of traditional large-scale biogas projects in terms of flexibility, maintainability, standardization, and downstream integration.

[0009] This utility model is implemented as follows: an organic fertilizer production device with a modular biogas fermentation unit, comprising: Multiple modular biogas digesters with the same structure are provided. Each of the multiple modular biogas digesters is provided with a feed inlet and a biogas outlet at the top, a slag discharge outlet at the bottom, and a biogas slurry overflow outlet on the side wall. The unit connection structure includes a main feed pipe that connects multiple feed inlets in parallel, a main biogas collection pipe that connects multiple biogas outlets in parallel, and a main slag discharge pipe and a main overflow pipe that connect multiple slag discharge outlets and multiple biogas slurry overflow outlets in parallel respectively.

[0010] As a preferred embodiment of the organic fertilizer production device with a modular biogas fermentation unit of this utility model, the ends of the main slag discharge pipe and the main overflow pipe are provided with biogas slag and biogas liquid output ports for connecting to external organic fertilizer production equipment.

[0011] As a preferred embodiment of the organic fertilizer production device with modular biogas fermentation units of this utility model, each of the multiple modular biogas fermentation tanks is equipped with a stirring mechanism. The stirring mechanism includes a rotating shaft rotatably connected to the top of the interior of the modular biogas fermentation tank, and multiple evenly distributed stirring rods are fixedly connected to the outer wall of the rotating shaft.

[0012] As a preferred embodiment of the organic fertilizer production device with modular biogas fermentation units of this utility model, the inner walls of the multiple modular biogas fermentation tanks are all provided with a heat insulation layer.

[0013] As a preferred embodiment of the organic fertilizer production device with a modular biogas fermentation unit of this utility model, valves are installed on the outer walls of the slag discharge port, biogas slurry overflow port, main feed pipe, main biogas collection pipe, main slag discharge pipe and main overflow pipe.

[0014] As a preferred embodiment of the organic fertilizer production device with a modular biogas fermentation unit of this utility model, the main slag discharge pipe is rotatably connected to a rotating rod, and the outer wall of the rotating rod is fixedly connected with evenly distributed auger blades. Both the rotating shaft and the rotating rod are driven to rotate by a motor.

[0015] As a preferred embodiment of the organic fertilizer production device with a modular biogas fermentation unit of this utility model, the modular biogas fermentation tank is made of one of fiberglass, stainless steel or engineering plastics.

[0016] The beneficial effects of this utility model are: This utility model significantly improves the flexibility and scalability of the device through modular fermenter design and parallel connection structure. Users can flexibly configure the scale according to actual needs, reducing initial investment and expansion difficulty and cost. Standardized modules facilitate factory production and rapid deployment, shortening the construction cycle; the independent tank design, combined with valve control, enables independent operation and maintenance of individual units without the need for overall shutdown, greatly improving the reliability and maintainability of continuous system operation; The modular design mitigates the risk of single-point failures, while the centralized biogas residue and biogas slurry output ports facilitate efficient connection with external organic fertilizer equipment. The built-in stirring and pipeline anti-clogging mechanisms ensure uniform material mixing and smooth material conveying, and the corrosion-resistant tank material extends the equipment's lifespan. Overall, this device effectively overcomes the shortcomings of traditional large-scale biogas projects in terms of flexibility, maintainability, standardization, and downstream integration. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a cross-sectional view of the modular biogas fermenter of this utility model; Figure 3 This is a cross-sectional view of the main slag discharge pipeline of this utility model.

[0019] The markings in the diagram are: 1. Modular biogas digester; 2. Feed inlet; 3. Biogas outlet; 4. Slag discharge outlet; 5. Biogas slurry overflow outlet; 6. Main feed pipe; 7. Main biogas collection pipe; 8. Main slag discharge pipe; 9. Main overflow pipe; 10. Shaft; 11. Stirring rod; 12. Valve; 13. Rotating rod; 14. Screwdriver blade. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0021] Please see Figure 1-3 An organic fertilizer production device with a modular biogas fermentation unit includes: Multiple modular biogas digesters 1 with the same structure are provided. Each of the multiple modular biogas digesters 1 is provided with a feed inlet 2 and a biogas outlet 3 at the top, a slag discharge outlet 4 at the bottom, and a biogas slurry overflow outlet 5 on the side wall. The unit connection structure includes a main feed pipe 6 that connects multiple feed inlets 2 in parallel, a main biogas collection pipe 7 that connects multiple biogas outlets 3 in parallel, a main slag discharge pipe 8 and a main overflow pipe 9 that connect multiple slag discharge outlets 4 and multiple biogas slurry overflow outlets 5 in parallel respectively.

[0022] In this embodiment: Each modular biogas digester 1 of the device is equipped with a feed inlet 2 and a biogas outlet 3 at the top, a slag discharge outlet 4 at the bottom, and a biogas slurry overflow outlet 5 on the side wall; through a unit connection structure, the main feed pipe 6 connects the feed inlets 2 in parallel to achieve unified feeding, the main biogas collection pipe 7 connects the biogas outlets 3 in parallel to collect biogas centrally, and the main slag discharge pipe 8 and the main overflow pipe 9 connect the slag discharge outlets 4 and the biogas slurry overflow outlets 5 in parallel to collect biogas slag and biogas slurry respectively; this modular design decomposes the large fermentation unit into multiple standard modular biogas digesters 1, significantly improving the flexibility and scalability of the device, and users can add or remove modular biogas digesters according to their needs. The number of tanks 1 significantly reduces the initial investment threshold and the difficulty and cost of subsequent expansion; the ends of the main slag discharge pipe 8 and the main overflow pipe 9 form biogas sludge and biogas liquid output ports, providing standardized interfaces for easy and quick connection to various existing external organic fertilizer production equipment, simplifying system integration; each modular biogas fermentation tank 1 is equipped with a stirring mechanism, including a rotating shaft 10 and a stirring rod 11, which forcibly stirs the materials inside the tank; the standardized modules facilitate factory production and rapid deployment, shortening the construction cycle; the independent tank design, combined with valve control, enables independent operation and maintenance of individual units without the need for overall shutdown, greatly improving the reliability and maintainability of continuous system operation.

[0023] As a technical optimization of this utility model, the ends of the main slag discharge pipe 8 and the main overflow pipe 9 are provided with biogas residue and biogas slurry output ports for connecting to external organic fertilizer production equipment.

[0024] In this embodiment: a biogas residue and biogas slurry output port is set up, providing a standardized and centralized interface, which greatly facilitates the rapid and flexible connection with external organic fertilizer production equipment such as solid-liquid separation, composting, and drying, and simplifies system docking.

[0025] As a technical optimization of this utility model, a stirring mechanism is provided inside each of the multiple modular biogas digesters 1. The stirring mechanism includes a rotating shaft 10 rotatably connected to the top of the inside of the modular biogas digester 1, and multiple evenly distributed stirring rods 11 are fixedly connected to the outer wall of the rotating shaft 10.

[0026] In this embodiment, a mechanical stirring mechanism consisting of a rotating shaft 10 and a stirring rod 11 is provided in each modular biogas digester 1. By forcibly stirring, the material in the tank is prevented from stratifying and solids are deposited, the raw materials are made into full contact with microorganisms, and the mass transfer efficiency is improved, thereby improving the biogas yield and fermentation stability.

[0027] As a technical optimization of this utility model, a heat insulation layer is provided in the inner wall of each of the multiple modular biogas fermentation tanks 1.

[0028] In this embodiment: an insulation layer is provided on the inner wall of the modular biogas digester 1 to effectively reduce heat loss during fermentation, maintain a constant optimal fermentation temperature (such as meso- or high-temperature) inside the digester, ensure the activity of anaerobic microorganisms, and guarantee the efficient and stable operation of the fermentation process.

[0029] As a technical optimization of this utility model, valves 12 are installed on the outer walls of the slag discharge port 4, the biogas overflow port 5, the main feed pipe 6, the main biogas collection pipe 7, the main slag discharge pipe 8, and the main overflow pipe 9.

[0030] In this embodiment, valves 12 are installed on the outer walls of the slag discharge port 4, the biogas slurry overflow port 5, the main feed pipe 6, the main biogas collection pipe 7, the main slag discharge pipe 8, and the main overflow pipe 9, so that each modular biogas digester 1 and each fluid channel can be independently controlled. This makes the start-up, shutdown, emptying, and maintenance of a single tank completely independent of other tanks. The system does not need to be shut down during maintenance, which significantly improves the availability and operational flexibility of the system.

[0031] As a technical optimization of this utility model, the main slag discharge pipe 8 is internally rotatably connected to a rotating rod 13, and the outer wall of the rotating rod 13 is fixedly connected to evenly distributed auger blades 14. Both the rotating shaft 10 and the rotating rod 13 are driven to rotate by a motor.

[0032] In this embodiment: A screw conveyor blade 14 driven by a rotating rod 13 is installed in the main slag discharge pipe 8. The propulsion and stirring action of the screw blades prevents the viscous and easily deposited biogas sludge from accumulating in the main slag discharge pipe 8 and causing blockage, thus ensuring a continuous and smooth slag discharge process.

[0033] As a technical optimization of this utility model, the modular biogas fermenter 1 is made of one of fiberglass, stainless steel or engineering plastic.

[0034] In this embodiment, the modular biogas digester 1 is made of fiberglass, stainless steel or engineering plastic. The excellent corrosion resistance of these materials helps to resist the erosion of corrosive substances such as hydrogen sulfide produced during the biogas fermentation process, which significantly improves the durability and service life of the equipment under harsh working conditions and reduces maintenance costs.

[0035] The working principle and usage process of this utility model are as follows: The pretreated organic waste slurry is first transported through the main feed pipe 6, and then evenly or as needed distributed to the feed inlets 2 of each modular biogas digester 1. Inside the sealed modular biogas digester 1, the material undergoes fermentation and decomposition under suitable temperature (maintained by the insulation layer and / or external heating system) and anaerobic environment. During fermentation, the stirring mechanism installed inside the tank rotates periodically or continuously under motor drive to fully stir and mix the material, preventing sedimentation and promoting the reaction. The biogas produced during fermentation rises to the top space of the tank and is collected through the biogas outlets 3 of each tank to the main biogas collection pipe 7 for subsequent purification, storage, and utilization. As fermentation progresses and new slurry is added, the mature biogas... The slag is discharged through the slag discharge port 4 at the bottom of the tank, while the biogas slurry overflows through the biogas slurry overflow port 5 on the side wall. The discharged slag and overflowing biogas slurry enter the main slag discharge pipe 8 and the main overflow pipe 9, respectively. In the main slag discharge pipe 8, the rotating rod 13 driven by the motor drives the auger blades 14 to rotate, continuously stirring and pushing the slag forward to prevent it from settling and clogging in the main slag discharge pipe 8. Finally, the slag and biogas slurry are discharged from the outlet at the end of the main slag discharge pipe 8 and the main overflow pipe 9 and transported to the externally connected organic fertilizer production equipment for solid-liquid separation, composting, drying and other subsequent processing into organic fertilizer products. During the operation of the device, the feeding, exhaust, slag discharge, overflow and fluid flow of each modular biogas digester 1 and the entire system can be flexibly controlled through multiple valves 12.

[0036] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0037] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An organic fertilizer production apparatus having a modular biogas fermentation unit, characterized by: include: Multiple modular biogas digesters (1) with the same structure are provided with a feed inlet (2) and a biogas outlet (3) at the top, a slag discharge outlet (4) at the bottom, and a biogas slurry overflow outlet (5) on the side wall. The unit connection structure includes a main feed pipe (6) that connects multiple feed inlets (2) in parallel, a main biogas collection pipe (7) that connects multiple biogas outlets (3) in parallel, a main slag discharge pipe (8) and a main overflow pipe (9) that connect multiple slag discharge outlets (4) and multiple biogas slurry overflow outlets (5) in parallel respectively.

2. The organic fertilizer production device with modular biogas fermentation unit according to claim 1, characterized in that: The ends of the main slag discharge pipe (8) and the main overflow pipe (9) are provided with biogas slag and biogas liquid output ports for connecting to external organic fertilizer production equipment.

3. The organic fertilizer production device with modular biogas fermentation unit according to claim 1, characterized in that: Each of the modular biogas digesters (1) is equipped with a stirring mechanism. The stirring mechanism includes a rotating shaft (10) rotatably connected to the top of the interior of the modular biogas digester (1). The outer wall of the rotating shaft (10) is fixedly connected with a plurality of evenly distributed stirring rods (11).

4. The organic fertilizer production device with modular biogas fermentation unit according to claim 1, characterized in that: Each of the modular biogas fermenters (1) has an insulation layer installed on its inner wall.

5. An organic fertilizer production device with a modular biogas fermentation unit according to claim 1, characterized in that: Valves (12) are installed on the outer walls of the slag discharge port (4), biogas slurry overflow port (5), main feed pipe (6), main biogas collection pipe (7), main slag discharge pipe (8) and main overflow pipe (9).

6. An organic fertilizer production device with a modular biogas fermentation unit according to claim 3, characterized in that: The main slag discharge pipe (8) is internally connected to a rotating rod (13), and the outer wall of the rotating rod (13) is fixedly connected to evenly distributed auger blades (14). Both the rotating shaft (10) and the rotating rod (13) are driven to rotate by a motor.

7. An organic fertilizer production device with a modular biogas fermentation unit according to claim 1, characterized in that: The modular biogas digester (1) is made of one of the following materials: fiberglass, stainless steel or engineering plastic.

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