Agricultural waste anaerobic fermentation device

Abstract

The utility model provides an anaerobic fermentation device for agricultural wastes, which relates to the technical field of fermentation devices and comprises a fermentation tank, a feed port is arranged at the top of the front end of the fermentation tank, a discharge port is arranged at the bottom of the rear end of the fermentation tank, and a stirring mechanism is arranged in the fermentation tank. A plurality of feeders are arranged below the feeding hole in the fermentation tank and are arranged at intervals along the width direction of the fermentation tank. According to the utility model, the plurality of feeders are arranged below the feed port of the fermentation tank in the width direction of the fermentation tank, materials falling from the feed port are in contact with the feeders to be buffered in the falling process, impact on the feeders and are scattered, so that the materials fall into the fermentation tank in a scattered manner, and the effect of avoiding the accumulation phenomenon of the materials is achieved; and the materials are more uniformly distributed, stirred and mixed in the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of fermentation devices, in particular to an anaerobic fermentation device for agricultural waste. Background Art

[0002] Biomass raw materials mainly include various urban and rural organic wastes such as crop straw, farm waste, domestic garbage, and industrial organic wastewater; biomass is used as raw material, and the combustible gas mainly containing methane produced through thermochemical conversion or biochemical conversion is called biogas. There are two major types of biogas. One is the incomplete combustion and pyrolysis of biomass under high temperature and oxygen-deficient conditions, which produces combustible gases mainly composed of carbon monoxide, hydrogen, nitrogen, etc., which is called gasification gas; the other is the decomposition of biomass by anaerobic bacteria under anaerobic conditions, which produces combustible gases mainly composed of methane and carbon dioxide, which is called biogas.

[0003] As a typical distributed energy production technology, biogas technology is an important means of treating organic waste. Biogas can be used flexibly and can be used directly to generate electricity and heat, or it can be coupled with power generation and purification of biogas.

[0004] In the prior art, Chinese patent CN214735724U published on November 16, 2021, records a biological fermentation treatment facility for agricultural organic waste, which achieves the effect of evenly stirring the fermented materials by setting a feeding port and a discharging port on a horizontal tank body, and setting a stirring rod in the horizontal tank body and connecting stirring blades.

[0005] However, this type of prior art does not take into account how to solve the problem of material accumulation below the feeding port in the tank body during the process of material entering the tank body from the feeding port. This accumulation phenomenon causes an uneven distribution of materials in the tank body, and to a certain extent, also has an adverse effect on the uniform mixing of materials in the subsequent stirring process. Utility Model Content

[0006] The purpose of the utility model is to provide an anaerobic fermentation device for agricultural waste, which can evenly drop materials into the fermentation tank to avoid accumulation;

[0007] The utility model provides an anaerobic fermentation device for agricultural waste, comprising a fermentation tank, wherein a feed port is arranged at the top of the front end of the fermentation tank, a discharge port is arranged at the bottom of the rear end of the fermentation tank, and a stirring mechanism is arranged inside the fermentation tank; a plurality of feeders are arranged below the feed port in the fermentation tank, and the plurality of feeders are arranged at intervals along the width direction of the fermentation tank.

[0008] Furthermore, the feeder comprises a rotating roller and blades, the rotating roller is rotatably arranged below the feed port, and a plurality of blades are circumferentially spaced and connected to the outer periphery of the rotating roller.

[0009] Furthermore, the rotating roller is arranged above the stirring mechanism.

[0010] Furthermore, the feed port is a long slot structure along the width direction of the fermentation tank.

[0011] Furthermore, both ends of the feed port along the width direction of the fermenter are inwardly inclined conical structures.

[0012] Furthermore, the stirring mechanism includes a stirring shaft and a stirrer, the stirrer is connected to the outer periphery of the stirring shaft, and the stirring shaft is arranged in the fermentation tank to rotate transversely.

[0013] Furthermore, the agitator is a screw feeder.

[0014] Furthermore, the discharge port is connected to a discharge tank for collecting post-fermentation products.

[0015] Furthermore, a discharge valve is provided between the discharge port and the discharge tank.

[0016] Furthermore, the discharge ports are respectively opened on both sides of the rear end of the fermentation tank, and each of the discharge ports is connected to the discharge tank via the discharge valve.

[0017] The technical solution of the utility model is to arrange a plurality of feeders below the feed port of the fermentation tank and along the width direction of the fermentation tank. The material falling from the feed port contacts the feeder and is buffered during its falling process, and the material impacts the feeder and splashes and disperses, so that the material is dispersed and falls into the fermentation tank, thereby avoiding the accumulation of the material and making the material more evenly distributed and stirred and mixed in the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a side view schematic diagram of the internal structure of the utility model;

[0020] Figure 2 It is a top view schematic diagram of the internal structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the feeder of the utility model;

[0022] Description of reference numerals:

[0023] 1-fermentation tank, 101-feeding port, 102-discharging port;

[0024] 2-stirring mechanism, 201-stirring shaft, 202-stirring device, 203-stirring motor;

[0025] 3-feeder, 301-rotating roller, 302-blade;

[0026] 4-discharge tank, 5-discharge valve. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Example 1

[0031] like Figure 1 and Figure 3As shown, the utility model provides an anaerobic fermentation device for agricultural waste, including a fermentation tank 1, a feed port 101 is provided at the top of the front end of the fermentation tank 1, a discharge port 102 is provided at the bottom of the rear end of the fermentation tank 1, and a stirring mechanism 2 is provided in the fermentation tank 1; a plurality of feeders 3 are provided below the feed port 101 in the fermentation tank 1, and the plurality of feeders 3 are arranged at intervals along the width direction of the fermentation tank 1.

[0032] Specifically, the fermentation tank 1 is generally a steel-concrete structure or a steel plate structure, and is externally insulated. A feed port 101 is provided at the top of the fermentation tank 1, and agricultural waste is fed into the feed port 101 at the top of the fermentation tank 1 by using a transmission device (transmission belt or screw conveyor, not shown), and the material falls under the action of gravity after entering the fermentation tank 1.

[0033] The feeder 3 is arranged between the feed port 101 and the stirring mechanism 2, and is used to buffer the falling materials. As the materials hit the feeder 3, they are splashed and dispersed, so the materials will not accumulate when they fall to the bottom of the fermentation tank 1; the feeder 3 can specifically be an impeller structure as in Example 2, or a simple material blocking rod structure, as long as the materials contact the feeder 3 during the falling process, the effect of buffering the materials and the impact and dispersion of the materials can be achieved.

[0034] During the falling process, the materials are evenly arranged to the front end of the fermentation tank 1 through multiple feeders 3 along the width direction; then the agricultural waste and the bacterial liquid in the tank are evenly mixed by the stirring device and slowly pushed to the end of the fermentation tank 1. The biogas produced by the fermentation tank 1 in the anaerobic environment can be used for energy. After the anaerobic degradation of the materials is completed, they enter the discharge port 102 at the end of the fermentation tank 1, completing an anaerobic fermentation cycle.

[0035] Example 2

[0036] like Figure 2 and Figure 3 As shown, the feeder 3 includes a rotating roller 301 and blades 302. The rotating roller 301 is rotatably arranged below the feed port 101, and a plurality of blades 302 are connected to the outer periphery of the rotating roller 301 at intervals in the circumferential direction. The rotating roller 301 is arranged above the stirring mechanism 2. The feed port 101 is a long groove structure along the width direction of the fermentation tank 1. Both ends of the feed port 101 along the width direction of the fermentation tank 1 are inclined inward conical surface structures.

[0037] Specifically, the feeder 3 is similar to a windmill structure, with multiple rotating shafts (connected to the inner wall of the front end of the fermentation tank 1 at intervals) arranged in the feed tank, and rotating rollers 301 are sleeved on the rotating shafts, and the rotating rollers 301 can rotate around the shafts, and the blades 302 are connected to the rotating rollers 301 in a circumferential direction. When the material falls from the feed port 101, it impacts the blades 302, drives the blades 302 to move, drives the rotating rollers 301 to rotate, and then the entire feeder 3 rotates to disperse and distribute the material, avoiding the accumulation of the material.

[0038] The feed port 101 is a long slot structure, which is convenient for receiving materials transported by the conveyor belt on the one hand; on the other hand, the area of ​​the feed port 101 is increased, the number of feeders 3 that can be arranged is increased, and the effect of avoiding material accumulation is improved. The two sides of the feed port 101 adopt a conical structure, which is conducive to the material falling to the front end of the fermentation tank 1.

[0039] Example 3

[0040] like Figure 1-Figure 3 As shown, the stirring mechanism 2 includes a stirring shaft 201 and a stirrer 202. The stirrer 202 is connected to the outer periphery of the stirring shaft 201. The stirring shaft 201 is disposed in the fermentation tank 1 for transverse rotation. The stirrer 202 is a screw feeder.

[0041] Specifically, the stirrer 202 is connected to a stirring shaft 201 equipped with a stirring motor 203, and the stirring motor 203 is connected to the front side of the outer side of the fermentation tank 1. The stirrer 202 pushes the material to move slowly toward the rear end of the fermentation tank 1 during the stirring process of the material.

[0042] Example 4

[0043] like Figure 1 and Figure 2 As shown, the discharge port 102 is connected to a discharge tank 4 for collecting the fermentation product. A discharge valve 5 is provided between the discharge port 102 and the discharge tank 4. Discharge ports 102 are provided on both sides of the rear end of the fermentation tank 1, and each discharge port 102 is connected to the discharge tank 4 through a discharge valve 5.

[0044] Specifically, after a fermentation cycle, the anaerobic fermentation material enters the discharge port 102 at the end of the fermentation tank 1, and the discharge valve 5 is opened. The degraded material enters the discharge tank 4 by gravity, and finally undergoes solid-liquid separation and subsequent resource utilization. Alternatively, if gravity discharge is insufficient, a vacuum suction can be set on the discharge tank 4 to introduce the material in the fermentation tank 1 by vacuum.

[0045] The discharge port 102 at the end of the fermentation tank 1 is arranged on both sides, and each is equipped with a set of discharge valves 5 and a discharge tank 4, so as to improve the discharge efficiency and enable continuous discharge in succession. For example, when the first discharge port 102 is working, the second one is closed. When the first discharge tank 4 is full, the first discharge port 102 is closed and the second discharge port 102 is opened to work, thereby realizing continuous discharge.

[0046] Working mode and principle of this utility model:

[0047] Agricultural waste is fed into the top feed port 101 of the fermentation tank 1 by using a transmission device (transmission belt or spiral conveyor). After entering the fermentation tank 1, the material falls under the action of gravity. During the falling process, the material is evenly arranged to the front end of the fermentation tank 1 through multiple feeders 3 along the width direction, so that the material will not accumulate and is evenly dispersed and distributed. Then, the agricultural waste and the bacterial liquid in the tank are evenly mixed by a stirring device and slowly pushed to the end of the fermentation tank 1. The biogas produced by the fermentation tank 1 in an anaerobic environment can be used for energy. After the anaerobic degradation of the material is completed, it enters the discharge port 102 at the end of the fermentation tank 1, completing an anaerobic fermentation cycle.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An anaerobic fermentation device for agricultural waste, characterized in that: It comprises a fermentation tank, wherein a feed inlet is provided at the top of the front end of the fermentation tank, a discharge outlet is provided at the bottom of the rear end of the fermentation tank, and a stirring mechanism is provided inside the fermentation tank; A plurality of feeders are arranged below the feed port in the fermentation tank, and the plurality of feeders are arranged at intervals along the width direction of the fermentation tank.

2. The agricultural waste anaerobic fermentation device according to claim 1, characterized in that: The feeder comprises a rotating roller and blades. The rotating roller is rotatably arranged below the feed port, and a plurality of blades are connected to the outer periphery of the rotating roller at intervals in the circumferential direction.

3. The agricultural waste anaerobic fermentation device according to claim 2, characterized in that: The rotating roller is arranged above the stirring mechanism.

4. The agricultural waste anaerobic fermentation device according to claim 1, characterized in that: The feed inlet is a long slot structure along the width direction of the fermentation tank.

5. The agricultural waste anaerobic fermentation device according to claim 4, characterized in that: Both ends of the feed port along the width direction of the fermenter are inwardly inclined conical structures.

6. The agricultural waste anaerobic fermentation device according to claim 1, characterized in that: The stirring mechanism comprises a stirring shaft and a stirrer. The stirrer is connected to the outer periphery of the stirring shaft. The stirring shaft is arranged in the fermentation tank for transverse rotation.

7. The agricultural waste anaerobic fermentation device according to claim 6, characterized in that: The stirrer is a screw feeder.

8. The agricultural waste anaerobic fermentation device according to claim 1, characterized in that: The discharge port is connected with a discharge tank for collecting the fermentation product.

9. The agricultural waste anaerobic fermentation device according to claim 8, characterized in that: A discharge valve is arranged between the discharge port and the discharge tank.

10. The agricultural waste anaerobic fermentation device according to claim 9, characterized in that: The discharge ports are respectively provided on both sides of the rear end of the fermentation tank, and each of the discharge ports is connected to the discharge tank via the discharge valve.

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