Multi-strain mixing equipment based on solid-state fermentation of crop straws

Abstract

The utility model relates to the technical field of crop straw treatment, in particular to multi-strain mixing equipment based on solid-state fermentation of crop straws, which comprises a fermentation tank, and stirring driving components are arranged at the bottom end and inside the fermentation tank; a dispersing and mixing assembly is arranged on the upper portion of the transmission shaft and comprises dispersing blades fixedly installed on the outer wall of the upper end of the transmission shaft, and a plurality of dispersing holes are formed in the end faces of the dispersing blades. According to the utility model, crop straw particles and strains are sequentially added, so that the crop straw particles and the strains can be ensured to be in the fermentation tank, and the condition that the strains are exposed in the external environment in the period from inoculation to loading can be avoided, and if harmful microorganisms, infectious microbes and the like exist in the surrounding environment, the strains are not exposed in the external environment. The problem that the fermentation effect is affected due to the fact that the microbial strains are likely to be attached to inoculated straw raw materials and compete with inoculated beneficial microbial strains for nutrient substances and space in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of crop straw treatment technology, and in particular to a multi-strain mixing device based on solid-state fermentation of crop straw. Background Technology

[0002] Solid-state fermentation of crop straw uses crop straw as the main raw material. By inoculating specific microbial strains under certain temperature, humidity and ventilation conditions, the high molecular polymers such as cellulose, hemicellulose and lignin in the straw are degraded into low molecular substances such as sugars, amino acids, volatile fatty acids, etc., thereby changing the physicochemical properties of the straw and improving its nutritional value, energy value or other application value.

[0003] In the use of multi-strain mixing equipment based on solid-state fermentation of crop straw, the activated inoculum is directly sprinkled onto the surface of the treated straw, and then stirred evenly by manual or mechanical means to ensure full contact between the inoculum and the straw. The inoculated straw material is then placed into fermentation containers, such as fermentation tanks, fermentation bags, or stacking fermentation sites.

[0004] In existing technical solutions, when the method of inoculation before loading is adopted, the microbial strain is exposed to the environment during the period from inoculation to the completion of loading. If there are harmful microorganisms or other bacteria in the surrounding environment, they may attach to the inoculated straw raw materials. These bacteria will compete with the inoculated beneficial microbial strains for nutrients and space, thereby affecting the fermentation effect. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-strain mixing device based on solid-state fermentation of crop straw. By adding crop straw particles and inoculum sequentially, it ensures that both the crop straw particles and inoculum are in the fermentation tank. This avoids the problem of exposing the inoculum to the external environment during the period from inoculation to completion of loading, where harmful microorganisms or other contaminants may attach to the inoculated straw material. These contaminants will compete with the inoculated beneficial microorganisms for nutrients and space, thus affecting the fermentation effect. This invention solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-strain mixing device based on solid-state fermentation of crop straw, including a fermentation tank, with a filling hopper fixedly connected to the top of the fermentation tank, and a stirring drive assembly provided at the bottom and inside of the fermentation tank, the stirring drive assembly including a stirring motor fixedly installed at the middle position of the bottom of the fermentation tank, and a drive shaft fixedly installed at the output end of the stirring motor;

[0007] The upper part of the drive shaft is provided with a dispersion and mixing assembly, which includes dispersion blades fixedly installed on the outer wall of the upper end of the drive shaft, and multiple dispersion holes are opened on the end face of the dispersion blades.

[0008] Preferably, the stirring drive assembly further includes helical blades fixedly mounted on the outer wall of the drive shaft.

[0009] Preferably, the dispersion mixing assembly further includes a dispersion connecting pipe fixedly installed on the side wall of the drive shaft, the interior of the drive shaft is a hollow structure, and the dispersion connecting pipe is interconnected with the interior of the drive shaft.

[0010] Preferably, the upper sidewall of the dispersing connecting pipe is provided with a plurality of equally spaced air jet holes, which are interconnected with the interior of the drive shaft through the dispersing connecting pipe.

[0011] Preferably, a heating tube is embedded in the inner wall of the fermenter, the heating tube is distributed in a ring along the inside of the fermenter, and the heating tube itself is S-shaped.

[0012] Preferably, an air supply assembly is provided outside the drive shaft. The air supply assembly includes a connecting sleeve rotatably sleeved on the outer wall of the lower end of the drive shaft, and a connecting air pipe is fixedly connected to the outer wall of the connecting sleeve.

[0013] Preferably, a connecting hole is provided on the outer wall of the drive shaft corresponding to the connecting sleeve, and a mixing pipe is fixedly connected to the outer wall of the drive shaft inside the fermenter, and multiple vent holes are provided on the outer wall of the mixing pipe.

[0014] Preferably, a discharge valve pipe is fixedly connected to the bottom end of the fermentation tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model utilizes the rotation of the dispersing blades to disperse and scatter the fallen inoculum. Combined with the inoculum falling through the dispersing holes, it enables the inoculum to be dispersed to different locations within the crop straw particles. The air ejected through the dispersing holes further mixes and disperses the added inoculum. This further coordination between the dispersing blades and the dispersing holes enhances the uniformity of inoculum dispersion during application, ensuring even distribution of the inoculum within the crop straw particles.

[0017] 2. This invention ensures that both crop straw particles and microbial inoculum are present in the fermentation tank by adding them sequentially. This avoids the problem of exposing the crop straw particles to the external environment during the period between inoculation and filling, where harmful microorganisms or other bacteria may attach to the inoculated straw material. These bacteria will compete with the beneficial microorganisms for nutrients and space, thus affecting the fermentation effect. Attached Figure Description

[0018] 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. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the fermenter of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the dispersion mixing component of this utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the air supply component and the drive shaft of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Fermentation tank; 2. Filling hopper; 3. Stirring drive assembly; 301. Stirring motor; 302. Drive shaft; 303. Spiral blades; 4. Dispersion and mixing assembly; 401. Dispersion blades; 402. Dispersion hole; 403. Dispersion connecting pipe; 404. Air jet hole; 5. Heating pipe; 6. Gas supply assembly; 601. Connecting air pipe; 602. Connecting bushing; 603. Connecting hole; 604. Mixing pipe; 605. Vent hole; 7. Discharge valve pipe. Detailed Implementation

[0025] 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.

[0026] This utility model provides a technical solution:

[0027] Please see Figures 1 to 3 A multi-strain mixing device based on solid-state fermentation of crop straw includes a fermentation tank 1. The top of the fermentation tank 1 is fixedly connected to a filling hopper 2. The bottom and interior of the fermentation tank 1 are provided with a stirring drive assembly 3. The stirring drive assembly 3 includes a stirring motor 301 fixedly installed at the middle position of the bottom of the fermentation tank 1. The output end of the stirring motor 301 is fixedly installed with a transmission shaft 302. The stirring drive assembly 3 also includes a spiral blade 303 fixedly installed on the outer wall of the transmission shaft 302. There is a gap between the spiral blade 303 and the inner wall of the fermentation tank 1, so that the fermented material transported to the upper part of the fermentation tank 1 can move to the lower end of the interior of the fermentation tank 1 through the gap.

[0028] A dispersion and mixing assembly 4 is provided on the upper part of the drive shaft 302. The dispersion and mixing assembly 4 includes dispersion blades 401 fixedly installed on the outer wall of the upper end of the drive shaft 302. Multiple dispersion holes 402 are opened on the end face of the dispersion blades 401. The dispersion and mixing assembly 4 also includes a dispersion connecting pipe 403 fixedly installed on the side wall of the drive shaft 302. The interior of the drive shaft 302 is a hollow structure. The dispersion connecting pipe 403 is interconnected with the interior of the drive shaft 302. Multiple air jet holes 404 are equidistantly distributed on the upper side wall of the dispersion connecting pipe 403. The air jet holes 404 are interconnected with the interior of the drive shaft 302 through the dispersion connecting pipe 403.

[0029] By adopting the above technical solution, during use, the crop straw particles to be fermented are fed into the fermentation tank 1 through the filling hopper 2. After the crop straw particles to be fermented are fed in, the fungi, bacteria, or combinations thereof to be added are added into the fermentation tank 1 through the filling hopper 2. During the adding process, the stirring motor 301 is started. The operation of the stirring motor 301 drives the drive shaft 302 to rotate, and the rotation of the drive shaft 302 drives the dispersing blades 401 to rotate. The dispersing blades 401 correspond to the filling hopper 2, thereby adding [the fungi, bacteria, or combinations thereof] into the filling hopper 2. The injected particles or inoculum will first fall onto the dispersing blades 401. The rotation of the dispersing blades 401 disperses and throws the fallen inoculum outwards. Combined with the inoculum falling through the dispersing holes 402, the inoculum is dispersed to different locations on the crop straw particles. The dispersing connecting pipe 403 is connected to the air supply component 6, allowing air supplied by the air supply component 6 to be ejected through the dispersing holes 402. This air then mixes and disperses the injected inoculum. Further coordination with 402 enhances the uniformity of inoculum dispersion during addition, building upon the dispersion blades 401 and dispersion holes 402. This ensures the uniform distribution of the inoculum within the crop straw pellets. Simultaneously with inoculum addition, the drive shaft 302 drives the spiral blades 303 to rotate. The rotating spiral blades 303 transport the crop straw pellets from the bottom of the fermenter 1 to the upper interior of the fermenter 1, ensuring even distribution of the inoculum within the crop straw pellets. It should be noted that during the vertical transport of the crop straw pellets... The sufficient friction between them ensures that the crop straw particles can roll and move up and down. By adding the crop straw particles and the inoculum in sequence, it is ensured that both the crop straw particles and the inoculum are in fermentation tank 1. This avoids the problem of exposing the crop straw particles to the external environment during the period from inoculation to completion of filling, when there are harmful microorganisms or other bacteria in the surrounding environment. These bacteria may attach to the inoculated straw material and compete with the inoculated beneficial microorganisms for nutrients and space, thus affecting the fermentation effect.

[0030] Specifically, such as Figures 2 to 4As shown, the gas supply component 6 includes a connecting sleeve 602 rotatably sleeved on the outer wall of the lower end of the drive shaft 302. A connecting air pipe 601 is fixedly connected to the outer wall of the connecting sleeve 602. A connecting hole 603 is opened on the outer wall of the drive shaft 302 corresponding to the connecting sleeve 602. A mixing pipe 604 is fixedly connected to the outer wall of the drive shaft 302 inside the fermentation tank 1. A plurality of air vents 605 are opened on the outer wall of the mixing pipe 604. A heating pipe 5 is embedded in the inner wall of the fermentation tank 1. The heating pipe 5 is distributed in a ring along the inside of the fermentation tank 1. The heating pipe 5 itself is S-shaped. The gas supply component 6 is set outside the drive shaft 302. A discharge valve pipe 7 is fixedly connected to the bottom end of the fermentation tank 1. A one-way exhaust valve pipe is also fixedly connected to the rear side wall of the fermentation tank 1.

[0031] By adopting the above technical solution, during fermentation, the heating tube 5 is energized, providing a suitable temperature for fermentation inside the fermenter 1. The filling hopper 2 is sealed and closed, and the air connection pipe 601 is connected to the air pump. Through the connection between the air pump and the air connection pipe 601, outside air can be pumped into the connecting sleeve 602. The connecting sleeve 602 is connected to the hollow drive shaft 302 through the connecting hole 603, thus pumping air into the drive shaft 302. The drive shaft 302 is connected to the mixing pipe 604, allowing air to pass through. The air is vented through the vent 605 on the mixing pipe 604 into the crop straw particles and inoculum at each level, thereby improving the fermentation effect. The rotation of the mixing pipe 604 ensures that the crop straw particles and inoculum at each level receive sufficient air supply. When there is too much gas inside the fermentation tank 1, the gas can be discharged through the one-way exhaust valve. When the material in the device has fermented well, the discharge valve 7 is opened. The connection between the discharge valve 7 and the fermentation tank 1 has a certain curvature, so the fermented material can be discharged from the discharge valve 7.

[0032] Working principle: During use, the crop straw pellets to be fermented are fed into the fermentation tank 1 through the filling hopper 2. After the crop straw pellets are fed in, the fungi, bacteria, or combinations thereof to be added are added into the fermentation tank 1 through the filling hopper 2. During the adding process, the stirring motor 301 is started. The stirring motor 301 drives the drive shaft 302 to rotate, which in turn drives the dispersing blades 401 to rotate. The dispersing blades 401 correspond to the filling hopper 2, thereby adding the fungi, bacteria, or combinations thereof to the fermentation tank 1. The injected particles or inoculum will first fall onto the dispersing blades 401. The rotation of the dispersing blades 401 disperses and scatters the fallen inoculum, which, combined with the inoculum falling through the dispersing holes 402, disperses to different locations on the crop straw particles. The dispersing connecting pipe 403 is connected to the air supply component 6, allowing air supplied by the air supply component 6 to be ejected through the dispersing holes 402. This air then mixes and disperses the injected inoculum. While the inoculum is being added, the drive shaft 302 drives the spiral blades 303 to rotate. The spiral blades 303, through rotation, transport the crop straw particles from the bottom of the fermenter 1 to the upper part of the fermenter 1, ensuring the inoculum is evenly distributed among the crop straw particles. During fermentation, the heating pipe 5 is energized, providing a suitable temperature for fermentation inside the fermenter 1. The adding hopper 2 is then sealed and closed. The connecting air pipe 601 is connected to the air pump, allowing outside air to be pumped into the connecting sleeve 602. Inside, the connecting sleeve 602 can be connected to the hollow drive shaft 302 through the connecting hole 603, so that air can be pumped into the drive shaft 302. The drive shaft 302 is connected to the mixing pipe 604, so that air can be discharged into the crop straw particles and inoculum at each level through the vent hole 605 on the mixing pipe 604. When there is too much gas inside the fermentation tank 1, the gas can be discharged from the one-way exhaust valve pipe. When the material in the device is fermented, the discharge valve pipe 7 can be opened to discharge the fermented material from the discharge valve pipe 7.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-strain mixing device for solid state fermentation of crop straw, comprising a fermentation tank (1), characterized in that: The top of the fermentation tank (1) is fixedly connected with a filling bucket (2), the bottom and the inside of the fermentation tank (1) are provided with a stirring driving assembly (3), the stirring driving assembly (3) comprises a stirring motor (301) fixedly installed at the middle position of the bottom of the fermentation tank (1), and the output end of the stirring motor (301) is fixedly connected with a transmission shaft (302). The upper portion of the transmission shaft (302) is provided with a dispersion mixing assembly (4), the dispersion mixing assembly (4) comprises dispersion blades (401) fixedly installed on the outer wall of the upper end of the transmission shaft (302), and a plurality of dispersion holes (402) are formed in the end face of the dispersion blades (401).

2. The multi-strain mixing device for solid state fermentation of crop straw according to claim 1, characterized in that: The stirring driving assembly (3) further comprises helical blades (303) fixedly installed on the outer wall of the transmission shaft (302).

3. The multi-strain mixing device for solid state fermentation of crop straw according to claim 1, characterized in that: The dispersion mixing assembly (4) further comprises dispersion communication pipes (403) fixedly installed on the side wall of the transmission shaft (302), the inside of the transmission shaft (302) is a hollow structure, and the dispersion communication pipes (403) and the inside of the transmission shaft (302) are in communication.

4. The multi-strain mixed equipment based on solid state fermentation of crop straw according to claim 3, characterized in that: A plurality of air injection holes (404) are formed in the upper side wall of the dispersion communication pipe (403) and are in communication with the inside of the transmission shaft (302) through the dispersion communication pipe (403).

5. The multi-strain mixing device for solid state fermentation of crop straw according to claim 1, characterized in that: The inside wall of the fermentation tank (1) is embedded with heating pipes (5), the heating pipes (5) are annularly distributed along the inside of the fermentation tank (1), and the heating pipes (5) are S-shaped.

6. The multi-strain mixing device for solid state fermentation of crop straw according to claim 1, characterized in that: The outside of the transmission shaft (302) is provided with a gas supply assembly (6), the gas supply assembly (6) comprises a communication shaft sleeve (602) rotatably sleeved on the outer wall of the lower end of the transmission shaft (302), and the outer wall of the communication shaft sleeve (602) is fixedly connected with a communication air pipe (601).

7. The multi-strain mixing device for solid state fermentation of crop straw according to claim 6, characterized in that: The outer wall of the transmission shaft (302) is provided with a communication hole (603) corresponding to the communication shaft sleeve (602), the outer wall of the transmission shaft (302) in the fermentation tank (1) is fixedly connected with a mixing pipe (604), and the outer wall of the mixing pipe (604) is provided with a plurality of air holes (605).

8. The multi-strain mixing device for solid state fermentation of crop straw according to claim 1, characterized in that: The bottom of the fermentation tank (1) is fixedly connected with a discharge valve pipe (7).

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