A straw dry fermentation reactor

Abstract

The utility model discloses a kind of straw dry fermentation reactor, it includes reactor shell and stirring mechanism.The reactor shell is rectangular, the bottom end of the reactor is fixedly connected with reactor bottom plate, multiple groups of the stirring mechanism are arranged in the cavity formed by the reactor bottom plate and the reactor shell with horizontal array, multiple the upper end of the back baffle of the reactor shell is equipped with multiple observation holes, multiple the observation holes are sealed using double glazing;The stirring mechanism includes stirring shaft and stirring vane, the stirring shaft is fixedly connected with four stirring vanes by four stirring connecting rods.The utility model solves the technical problem of poor material mixing uniformity, low fermentation efficiency, poor fermentation effect and low space utilization in the field of straw fermentation technology.

Description

Technical Field

[0001] This utility model relates to the field of straw fermentation technology, specifically to a straw dry fermentation reactor. Background Technology

[0002] With increasing environmental awareness and growing demand for clean energy, the technology of producing biogas from straw is receiving increasing attention. Straw dry fermentation reactors use anaerobic fermentation technology to convert agricultural waste such as straw into biogas (mainly methane) and organic fertilizer, achieving effective waste utilization and resource recycling. This process not only reduces environmental pollution caused by straw burning but also provides renewable clean energy, helping to reduce greenhouse gas emissions. Furthermore, the organic fertilizer produced after fermentation can improve soil quality, support sustainable agricultural development, and the application of this technology also creates economic and social value for rural areas, promoting local economic development and improving energy self-sufficiency.

[0003] However, traditional dry fermentation reactors for straw typically employ a cylindrical design. For large-scale straw biogas projects, the shape of the traditional cylindrical reactor may limit the ability to achieve ideal mixing for dry or highly viscous materials, thus affecting fermentation efficiency. Furthermore, cylindrical reactors may suffer from uneven heat distribution, especially when processing large volumes of materials, potentially leading to localized overcooling or overheating and impacting fermentation. Additionally, the cylindrical design may not be the most efficient use of space in certain situations, particularly when land resources are limited. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a dry fermentation reactor for straw, which solves the technical problems of poor material mixing uniformity, low fermentation efficiency, poor fermentation effect and low space utilization in the field of straw fermentation technology.

[0005] To achieve the above technical objectives, the present invention provides a dry fermentation reactor for straw, comprising:

[0006] The reactor shell and the stirring mechanism are as follows: the reactor shell is rectangular; a reactor bottom plate is fixedly connected to the bottom of the reactor; multiple stirring mechanisms are arranged in a horizontal array within the cavity formed by the reactor bottom plate and the reactor shell; multiple observation holes are provided at the upper end of the rear baffle of the reactor shell; the multiple observation holes are sealed with double-layered glass; the stirring mechanism includes a stirring shaft and stirring blades; four stirring blades are fixedly connected to the stirring shaft through four stirring connecting rods.

[0007] Compared with the prior art, the beneficial effects of this utility model include:

[0008] 1. Uniform material mixing and high fermentation efficiency: The straw dry fermentation reactor provided by this utility model adopts a multi-set stirring device design, which can more effectively ensure the uniform distribution of biomass and microorganisms.

[0009] 2. Excellent fermentation effect: The straw dry fermentation reactor provided by this utility model adopts a rectangular design, which provides a larger surface area to volume ratio, and the internal temperature is better controlled through an effective stirring mechanism, which helps to maintain an optimal fermentation environment.

[0010] 3. High space utilization: The straw dry fermentation reactor provided by this utility model adopts a rectangular reactor shell, which can make more efficient use of available space and is easier to integrate with other rectangular buildings, thereby improving the overall space utilization efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the straw dry fermentation reactor provided by this utility model;

[0012] Figure 2 This is a three-dimensional structural diagram of the stirring mechanism in the straw dry fermentation reactor provided by this utility model;

[0013] Figure 3 This is a front view structural diagram of the stirring mechanism in the straw dry fermentation reactor provided by this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] Please see Figure 1 , Figure 2 , Figure 3 This embodiment provides a straw dry fermentation reactor, including a reactor shell 1 and a stirring mechanism 23.

[0018] Furthermore, the reactor shell 1 is rectangular. A reactor bottom plate 2 is fixedly connected to the bottom end of the reactor shell 1. Multiple sets of stirring mechanisms 3 are arranged in a horizontal array within the cavity formed by the reactor bottom plate 2 and the reactor shell 1. Multiple observation holes 12 are provided at the upper end of the rear baffle 11 of the reactor shell 1. The multiple observation holes 12 are sealed with double-layered glass. The stirring mechanism 3 includes a stirring shaft 31 and stirring blades 32. The stirring shaft 31 is fixedly connected to four stirring blades 32 through four stirring connecting rods 33.

[0019] Furthermore, compared to traditional cylindrical reactors, the rectangular reactor shell 1 allows for the installation of multiple sets of stirring mechanisms 3. These multiple stirring mechanisms 3 can more effectively ensure the uniform distribution of biomass and microorganisms, especially during dry fermentation. Due to the low moisture content and poor flowability of the materials, good stirring helps promote contact between substances, thereby improving fermentation efficiency. The rectangular reactor shell 1 design provides a larger surface area to volume ratio compared to a cylindrical design. Combined with the effective stirring mechanisms 3, it can better control the internal temperature, ensuring that the fermentation process takes place within an ideal temperature range, thus improving the gas production rate. The rectangular reactor shell 1 has a relatively simple structure and does not have the hard-to-reach corners of a cylindrical bottom, making it easier to inspect, maintain, and clean up residues. In situations where land resources are limited, the rectangular reactor shell 1 can utilize available space more efficiently and is easier to integrate with other rectangular buildings, improving overall space utilization efficiency.

[0020] Furthermore, the rear baffle 11 of the reactor shell 1 has multiple observation holes 12, which mainly serve the following functions: 1. Monitoring the fermentation process: The observation holes allow direct observation of the internal conditions of the reactor shell, including the stirring state of the materials and the degree of fermentation. This is crucial for timely understanding of the fermentation process and helps ensure that the entire fermentation process proceeds as expected; 2. Checking equipment operation: The observation holes 12 can be used to check the working status of the stirring mechanism 3 and other internal components, and to determine whether there are mechanical faults or wear, so as to facilitate timely maintenance and repair and avoid production interruptions due to equipment failure; 3. Assessing biogas production: Although the main gas collection device is located at the top of the reactor shell 1, the observation holes 12 can also be used to indirectly assess the activity of biogas production, such as observing whether there are bubbles forming. This is valuable for adjusting operating parameters (such as temperature and humidity) to optimize gas production efficiency; 4. Sampling and analysis: The observation holes 12 can also serve as sampling inlets, facilitating the extraction of material samples from the reactor shell 1 for chemical or biological analysis to monitor changes in important indicators such as pH and microbial activity during the fermentation process and ensure fermentation quality.

[0021] Furthermore, the four stirring connecting rods 33 are arranged in four relatively parallel vertical planes and face four different directions. The stirring blades 32 are fixed to the stirring connecting rods 33 at an angle with bolts. The side of the stirring blades 32 away from the stirring shaft 31 is higher than the side of the stirring blades 32 close to the stirring shaft 31.

[0022] Furthermore, the stirring blade 32 includes a blade body 321 and a blade side plate 322. The blade side plate 322 is connected to both sides of the blade body 321. The blade side plate 322 is integrally formed by bending the blade body 321. The cross-section of the stirring blade 32 is U-shaped.

[0023] Furthermore, the arrangement of the four stirring blades 32 on four relatively parallel vertical planes and oriented in four different directions ensures more uniform mixing of the material in three-dimensional space. Each stirring blade 32 exerts a different force on the surrounding material, helping to break up material agglomeration and allowing biomass and microorganisms to come into more complete contact, thereby improving fermentation efficiency. Simultaneously, the stirring blades 32 in different directions help break up large bubbles and evenly disperse them throughout the reactor shell 1 or help them rise to the top more quickly to be captured by the collection device. This not only improves gas collection efficiency but also reduces the ineffective space caused by bubble accumulation.

[0024] Furthermore, the arrangement of the four stirring blades 32 on four relatively parallel vertical planes and facing four different directions can effectively stir the material at various levels, reduce the occurrence of sedimentation, and at the same time prevent the material from accumulating near the stirring shaft 31 or other key parts, which could lead to equipment blockage or increased wear. The stirring blades 32 in different directions can ensure that heat is transferred more effectively from the heating source (such as the reactor shell wall) to the entire material pile, maintaining a more stable and suitable temperature environment.

[0025] Furthermore, the side of the stirring blade 32 furthest from the stirring shaft 31 is higher than the side of the stirring blade 32 closest to the stirring shaft 31, which is also mainly to improve stirring efficiency.

[0026] Furthermore, one end of the stirring shaft 31 is rotatably connected to the rear baffle 11 of the reactor shell 1, and the other end of the stirring shaft 31 is rotatably connected to the front baffle 13 of the reactor shell 1. The end of the stirring shaft 31 near the front baffle 13 is driven to be connected to the output shaft of the stirring drive source 34.

[0027] Furthermore, the rear baffle 11 of the reactor shell 1 has a mounting hole, in which a bearing is installed. The bearing enables the stirring shaft 31 to be rotatably connected to the rear baffle 11 of the reactor shell 1. Similarly, the front baffle 13 of the reactor shell 1 also has a mounting hole, in which a bearing is installed. The bearing enables the stirring shaft 31 to be rotatably connected to the front baffle 13 of the reactor shell 1. When the output shaft of the stirring drive source 34 rotates, it drives the stirring shaft 31 to rotate, thereby driving the stirring blades 32 to rotate.

[0028] Furthermore, the stirring mechanism 3 also includes a stirring drive source fixing frame 35, one end of which is fixedly connected to the fixed end of the stirring drive source 34, and the other end of which is fixedly connected to the front baffle 13 of the reactor shell 1.

[0029] Furthermore, the stirring drive source fixing bracket 35 is used to fix the stirring drive source 34, making the stirring mechanism 3 more stable during operation and improving the service life of the stirring mechanism 3.

[0030] Furthermore, a biogas collection hood is provided at the upper end of the reactor shell 1, the biogas collection hood is connected to a biogas pipe 14, the inner wall of the reactor shell 1 is lined with an anti-corrosion layer, and the outer wall of the reactor shell 1 is provided with a heat insulation layer 15.

[0031] Furthermore, the biogas collection hood can effectively capture biogas produced by anaerobic fermentation of biomass, and use the collected biogas as a renewable energy source for power generation, heating, or as vehicle fuel.

[0032] Furthermore, the main function of the anti-corrosion lining of the inner wall of reactor shell 1 is to protect reactor shell 1 from corrosion and wear by the internal media, extend the service life of the equipment, and ensure the safety and stability of the production process. The anti-corrosion lining is generally made of stainless steel, glass flake resin, rubber-lined polyethylene (PE), polypropylene (PP), etc.

[0033] Furthermore, the insulation layer 15 installed on the outer wall of the reactor shell 1 mainly serves to maintain temperature stability and promote the reaction rate. A stable temperature helps to accelerate the reaction rate and improve product yield and quality. Commonly used insulation materials include glass wool, rock wool, polyurethane foam (PU), and aluminum silicate fiber.

[0034] Working principle: The straw dry fermentation reactor provided by this utility model includes a reactor shell 1 and a stirring mechanism 23. The reactor shell 1 is rectangular. A reactor bottom plate 2 is fixedly connected to the bottom end of the reactor shell 1. Multiple sets of stirring mechanisms 3 are arranged in a horizontal array within the cavity formed by the reactor bottom plate 2 and the reactor shell 1. Multiple observation holes 12 are opened at the upper end of the rear baffle 11 of the reactor shell 1. The multiple observation holes 12 are sealed with double-layer glass. The stirring mechanism 3 includes a stirring shaft 31 and stirring blades 32. The stirring shaft 31 is fixedly connected to four stirring blades 32 through four stirring connecting rods 33.

[0035] Specifically, the rectangular reactor shell 1 has multiple sets of stirring mechanisms 3 installed inside its inner cavity, which greatly improves the uniformity of material stirring and thus fermentation efficiency. At the same time, the rectangular reactor shell 1 improves space utilization.

[0036] Specifically, the stirring mechanism 3 employs four stirring blades 32 arranged on four relatively parallel vertical planes facing four different directions, ensuring more uniform mixing of materials in three-dimensional space. Each stirring blade 32 exerts a different force on the surrounding materials, helping to break up material agglomeration and allowing biomass and microorganisms to come into more complete contact, thereby improving fermentation efficiency. Simultaneously, the stirring blades 32 in different directions help break up large air bubbles and evenly disperse them throughout the reactor shell 1 or help them rise to the top more quickly to be captured by the collection device. This not only improves gas collection efficiency but also reduces the ineffective space caused by bubble accumulation.

[0037] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A dry fermentation reactor for straw, characterized in that, include: The reactor shell and the stirring mechanism are included. The reactor shell is rectangular in shape. A reactor bottom plate is fixedly connected to the bottom end of the reactor shell. Multiple stirring mechanisms are arranged in a horizontal array within the cavity formed by the reactor bottom plate and the reactor shell. Multiple observation holes are provided at the upper end of the rear baffle of the reactor shell. The multiple observation holes are sealed with double-layered glass. The stirring mechanism includes a stirring shaft and stirring blades. The stirring shaft is fixedly connected to four stirring blades through four stirring connecting rods.

2. The straw dry fermentation reactor according to claim 1, characterized in that, The four stirring connecting rods are arranged in four relatively parallel vertical planes and face four different directions; the stirring blades are fixed to the stirring connecting rods at an angle with bolts; the side of the stirring blades away from the stirring shaft is higher than the side of the stirring blades close to the stirring shaft.

3. The straw dry fermentation reactor according to claim 2, characterized in that, The stirring blade includes a blade body and blade side plates; the blade side plates are connected to both sides of the blade body; the blade side plates are bent and integrally formed with the blade body; the cross-section of the stirring blade is U-shaped.

4. The straw dry fermentation reactor according to claim 3, characterized in that, One end of the stirring shaft is rotatably connected to the rear baffle of the reactor shell; the other end of the stirring shaft is rotatably connected to the front baffle of the reactor shell; the end of the stirring shaft near the front baffle of the reactor shell is connected to the output drive of the stirring drive source.

5. The straw dry fermentation reactor according to claim 4, characterized in that, The stirring mechanism further includes a stirring drive source fixing frame; one end of the stirring drive source fixing frame is fixedly connected to the fixed end of the stirring drive source; the other end of the stirring drive source fixing frame is fixedly connected to the front baffle of the reactor shell.

6. The straw dry fermentation reactor according to claim 5, characterized in that, The upper end of the reactor shell is provided with a biogas collection hood; the biogas collection hood is connected to a biogas pipeline; the inner wall of the reactor shell is lined with an anti-corrosion layer; and the outer wall of the reactor shell is provided with a heat insulation layer.

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