Fermentation equipment for biological feed

Abstract

Fermentation equipment for biological feed relates to the field of biological feed fermentation and comprises a fermentation bin, and a spiral stirring mechanism and an air supply mechanism which are arranged in the fermentation bin. The spiral stirring mechanism comprises a spiral blade assembly and a stirring shaft, the stirring shaft is of a hollow structure and is arranged in the middle of the spiral blade assembly, and air injection holes are formed in the surface of the spiral blade assembly and are communicated with the interior of the stirring shaft. According to the fermentation equipment for the biological feed, the fermented feed is turned over and stirred up and down through the spiral blade assembly, the feed between the upper layer and the lower layer in the fermentation bin can be well mixed, and oxygen-containing gas is supplemented into the fermented feed on the spiral blade assembly while stirring is conducted; fermented feed at the bottom of the fermentation bin can be fully combined with oxygen in air, and the fermentation degree of each position of the fermentation bin can be uniform and stable.

Description

Technical Field

[0001] The present invention relates to the technical field of biological feed fermentation, in particular to a biological feed fermentation device. Background Art

[0002] Bio-fermentation feed technology is a modern agricultural technology that can enhance the nutritional value of plants and improve the nutritional composition of feed, thereby increasing animal growth and production efficiency. Bio-fermentation feed has emerged as a result of the development of modern animal husbandry. With the continuous deepening of research on animal nutritional needs and breeding efficiency, traditional feeds face several challenges. On the one hand, the efficient utilization of feed resources has become a key issue. On the other hand, high-quality feed raw materials are limited and costly, while a large number of potential feed resources such as agricultural by-products are underutilized. Bio-fermentation technology provides a new way to transform these resources. Through the action of microorganisms, complex substances can be broken down, improving their nutritional value and availability. During the production of bio-fermentation feed, stirring is crucial. First, stirring ensures uniform mixing of the fermentation raw materials and fermentation agent, ensuring even distribution of the fermentation agent throughout the material, allowing the microorganisms to better interact with the fermentation substrate. Second, stirring improves the aeration of the material, providing a suitable oxygen environment for the microorganisms and promoting their activity.

[0003] In the past, biological feed fermentation equipment mostly used a rotary agitator during the stirring process, and the upper and lower layers of the fermented feed could not be well mixed, resulting in the fermented feed at the bottom of the fermentation bin not being able to fully combine with the oxygen in the air, resulting in uneven fermentation in the fermentation bin. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the first purpose of the present invention is to provide a biological feed fermentation equipment, so that the feed between the upper and lower layers in the fermentation bin can be well mixed, and the fermented feed at the bottom of the fermentation bin can also be fully combined with the oxygen in the air, so that the fermentation degree at each position of the fermentation bin can be uniform and stable.

[0006] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a fermentation equipment for biological feed, including a fermentation bin, and a spiral stirring mechanism and an air supply mechanism arranged inside the fermentation bin, the spiral stirring mechanism including a spiral blade assembly and a stirring shaft, wherein the stirring shaft is a hollow structure, the stirring shaft is arranged in the middle position of the spiral blade assembly, the stirring shaft is used to drive the spiral blade assembly to rotate, the surface of the spiral blade assembly is provided with an air jet hole, the air jet hole is connected to the interior of the stirring shaft, the air supply mechanism is connected to the air jet hole, the air supply mechanism includes an air supply pipe and a gas booster pump, wherein the air supply pipe is connected to the air inlet end of the gas booster pump, and the air outlet end of the gas booster pump is connected to the interior of the stirring shaft, for pumping oxygen into the interior of the stirring shaft.

[0007] In addition, the bio-feed fermentation equipment proposed in the present invention may also have the following additional technical features: Furthermore, the spiral radius of the spiral blade assembly increases from top to bottom, and the spiral pitch of the spiral blade assembly decreases from top to bottom.

[0008] Furthermore, the spiral blade assembly includes a plurality of trapezoidal blades connected side by side in a stepped manner, and the air injection holes are arranged at the bottom of the trapezoidal blades.

[0009] Furthermore, a humidifying mechanism is provided on the top of the stirring shaft, and the humidifying mechanism is used to spray and humidify the feed in the fermentation bin. The humidifying mechanism includes a booster water pump, a rotary nozzle and a mixing turntable, wherein the rotary nozzle is arranged on the stirring shaft, the mixing turntable is arranged on the top of the stirring shaft, the booster water pump is arranged on the top of the fermentation bin, and the liquid outlet end of the booster water pump is rotatably connected to the liquid inlet end of the mixing turntable, and the liquid outlet end of the mixing turntable is connected to the rotating nozzle.

[0010] Furthermore, a one-way air valve is provided on the top of the stirring shaft, the one-way air valve is communicated with the mixing rotary seat, and the top of the one-way air valve is an inverted cone structure.

[0011] Furthermore, a driving assembly is provided at the bottom of the fermentation bin, and a power shaft of the driving assembly is connected to the stirring shaft.

[0012] Furthermore, a first sealed bearing is provided at the gas outlet end of the gas booster pump, and the gas outlet end of the gas booster pump is rotatably connected to the bottom of the stirring shaft through the first sealed bearing.

[0013] Furthermore, a gas treatment mechanism is provided on one side of the fermentation bin, and the gas treatment mechanism is used to purify the gas in the fermentation bin. The gas treatment mechanism includes a gas treatment box, a gas flow pipe and a gas washing pipe, wherein the gas treatment box is provided on one side of the fermentation bin, and the gas flow pipe is vertically provided inside the gas treatment box. The gas flow pipe is connected to the interior of the fermentation bin, and the gas flow pipe passes through the inside of the gas washing pipe.

[0014] Furthermore, the top of the gas washing pipe is a hollow structure, the bottom of the gas treatment box is provided with a drain port for discharging the liquid in the gas washing pipe, a pressure limiting valve is provided on the top of the gas treatment box, a gas return pipe is provided inside the gas treatment box, and a control valve is provided at the bottom of the gas return pipe, and the control valve is connected to the gas supply pipe.

[0015] Furthermore, the bottom of the fermentation bin is in contact with the bottom edge of the spiral blade assembly, and a bin door is provided on one side of the fermentation bin.

[0016] Beneficial effects: The present invention uses a spiral blade assembly to roll and stir the fermented feed up and down, so that the feed between the upper and lower layers in the fermentation bin can be well mixed, and oxygen-containing gas is added to the fermented feed on the spiral blade assembly while stirring, so that the fermented feed at the bottom of the fermentation bin can also be fully combined with oxygen in the air, so that the fermentation degree at each position of the fermentation bin can be uniform and stable.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic structural diagram of a bio-feed fermentation device according to one embodiment of the present invention; Figure 2 It is a front cross-sectional view of a gas processing mechanism in a bio-feed fermentation device according to one embodiment of the present invention; Figure 3 A partial cross-sectional view of a bio-feed fermentation device according to one embodiment of the present invention; Figure 4 for Figure 3 A magnified view of middle A; Figure 5 for Figure 3 Enlarged view of middle B; Figure 6 The figure is a top cross-sectional view of a biological feed fermentation device according to one embodiment of the present invention.

[0019] As shown in the figure: 1. Fermentation chamber; 11. Chamber bottom; 2. Chamber door; 3. Gas treatment mechanism; 31. Exhaust pipe; 32. Pressure limiting valve; 33. Gas guide pipe; 34. Gas washing pipe; 35. Gas reflux pipe; 36. Control valve; 37. Gas treatment box; 371. Drain port; 4. Air supply mechanism; 41. Air supply pipe; 42. Gas booster pump; 421. First sealed bearing; 43. Drive assembly; 5. Spiral stirring mechanism; 51. Spiral blade assembly; 511. Trapezoidal blade; 512. Jet hole; 52. Stirring shaft; 6. Humidification mechanism; 61. Booster water pump; 62. Rotating nozzle; 63. Liquid outlet joint; 64. Second sealed bearing; 65. One-way air valve; 66. Mixing seat. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0021] The following describes the biological feed fermentation equipment according to the embodiment of the present invention with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 3 As shown, the biological feed fermentation equipment provided by the embodiment of the present invention includes a fermentation bin 1, and a spiral stirring mechanism 5 and an air supply mechanism 4 arranged inside the fermentation bin 1, and a bin door 2 is provided on one side of the fermentation bin 1.

[0023] The spiral stirring mechanism 5 includes a spiral blade assembly 51 and a stirring shaft 52, wherein the stirring shaft 52 is a hollow structure, and the stirring shaft 52 is arranged in the middle position of the spiral blade assembly 51. The surface of the spiral blade assembly 51 is provided with an air jet hole 512, and the air jet hole 512 is connected to the inside of the stirring shaft 52.

[0024] The air supply mechanism 4 is used to provide oxygen-containing gas into the fermentation bin 1. The air supply mechanism 4 includes an air supply pipe 41 and a gas booster pump 42. The air supply pipe 41 is connected to the air inlet end of the gas booster pump 42, and the air outlet end of the gas booster pump 42 is connected to the inside of the stirring shaft 52.

[0025] Specifically, during the process of feed fermentation, the door 2 on one side of the fermentation bin 1 is opened, and the feed to be fermented and the fermentation agent are placed into the fermentation bin 1. Then the door 2 is closed, and the driving assembly 43 at the bottom of the stirring shaft 52 drives the stirring shaft 52 to rotate, thereby driving the spiral blade assembly 51 to rotate. The rotation of the spiral blade assembly 51 transfers the feed at the bottom of the fermentation bin 1 to the top, so that the feed in the fermentation bin 1 rolls up and down and is evenly mixed, so that the feed at the bottom of the fermentation bin 1 can fully contact with the air inside the fermentation bin 1.

[0026] During the stirring process, oxygen-containing gas is added through the air supply pipe 41, and the gas enters the stirring shaft 52 through the air supply pipe 41 in turn. The oxygen-containing gas is sent into the air injection hole 512 in the spiral blade assembly 51 through the stirring shaft 52 and discharged. Therefore, while the spiral blade assembly 51 stirs the feed, the stirred feed can come into contact with the oxygen-containing gas, which can provide better fermentation conditions for the fermentation bacteria in the feed.

[0027] In one embodiment of the present invention, Figure 3 As shown, the spiral radius of the spiral blade assembly 51 increases from top to bottom, and the spiral pitch of the spiral blade assembly 51 decreases from top to bottom.

[0028] Specifically, during the process of stirring the feed in the fermentation bin 1, in order to prevent the feed from clumping and hardening during fermentation, as well as insufficient stirring, the spiral radius at the bottom of the fermentation bin 1 is designed to be larger so that the feed at the bottom of the fermentation bin 1 can be crushed and stirred. The feed in the upper part of the fermentation bin 1 will fall due to gravity and then be continuously crushed, and the feed in the fermentation bin 1 will continuously circulate up and down and be stirred.

[0029] And because the spiral radius at the top of the fermentation bin 1 is designed to be small, the feed at the bottom of the fermentation bin 1 is transferred upward from the middle position, which can reduce the stirring power of the stirring shaft 52, prevent the agglomerated feed from being subjected to concentrated force and moving upward, and thus prevent the agglomerated feed from being stirred ineffectively.

[0030] In one embodiment of the present invention, Figure 5 and Figure 6 As shown, the spiral blade assembly 51 includes a plurality of trapezoidal blades 511 connected side by side in a stepped manner, and the air injection holes 512 are provided at the bottom of the trapezoidal blades 511 .

[0031] Specifically, in order to enable the spiral blade assembly 51 to fully contact and crush the feed at the bottom of the fermentation bin 1, the surface of the spiral blade assembly 51 is provided with trapezoidal blades 511 connected side by side in a step-like manner, so that the stepped trapezoidal blades 511 form a Figure 6 The scale structure shown sweeps the feed at the bottom of the fermentation bin 1, generating greater friction.

[0032] During the rotation of the spiral blade assembly 51, the air jet holes 512 provided at the bottom of the trapezoidal blades 511 create a gap between the feed at the bottom of the fermentation bin 1 and the air jet holes 512, allowing air to flow more easily. As the spiral blade assembly 51 tumbles the feed, the oxygen-containing air ejected from the air jet holes 512 is more easily absorbed into the crushed feed, increasing the oxygen content in the feed. Furthermore, the air jet holes 512 provided at the bottom of the trapezoidal blades 511 blow away any residual feed at the bottom of the trapezoidal blades 511, reducing clogging and enhancing the sweeping effect of the trapezoidal blades 511.

[0033] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, a humidifying mechanism 6 is provided on the top of the stirring shaft 52. The humidifying mechanism 6 is used to spray and humidify the feed in the fermentation bin 1. The humidifying mechanism 6 includes a booster water pump 61, a rotary nozzle 62, and a mixing turntable 66. The rotary nozzle 62 is provided on the stirring shaft 52, the mixing turntable 66 is provided on the top of the stirring shaft 52, the booster water pump 61 is provided on the top of the fermentation bin 1, and the liquid outlet of the booster water pump 61 is rotatably connected to the liquid inlet of the mixing turntable 66, and the liquid outlet of the mixing turntable 66 is connected to the rotary nozzle 62. It should be noted that a liquid outlet connector 63 is provided at the liquid outlet of the booster water pump 61, and the liquid outlet connector 63 is rotatably connected to the mixing turntable 66 via a second sealed bearing 64.

[0034] Specifically, during the feed fermentation process, in order to provide moist fermentation conditions, the booster water pump 61 is connected to the water source, and the booster water pump 61 sends water into the mixing rotary seat 66 through the liquid outlet joint 63. The mixing rotary seat 66 sends the water to the inside of the rotary nozzle 62, and the rotary nozzle 62 sprays water downward to humidify the feed during the fermentation process. Since the rotary nozzle 62 is arranged at the top of the stirring shaft 52, the rotary nozzle 62 rotates and sprays together with the stirring shaft 52, so that the feed in the fermentation bin 1 is humidified more evenly.

[0035] In one embodiment of the present invention, Figure 4 As shown, a one-way air valve 65 is provided on the top of the stirring shaft 52, and the one-way air valve 65 is connected to the mixing rotary seat 66. The top of the one-way air valve 65 is an inverted cone structure, which makes it easier for the gas to mix into the water.

[0036] Specifically, in the process of supplying water to the rotating nozzle 62, the oxygen-containing gas in the stirring shaft 52 is sent into the mixing rotary seat 66 through the one-way air valve 65, mixed with water, and sprayed out as water mist through the rotating nozzle 62, thereby increasing the oxygen content in the water and allowing the oxygen to be fully absorbed by the fermentation bacteria.

[0037] In one embodiment of the present invention, Figure 3As shown, a drive assembly 43 is provided at the bottom of the fermentation bin 1. The power shaft of the drive assembly 43 is connected to the stirring shaft 52, and is used to drive the stirring shaft 52 and the spiral blade assembly 51 to rotate. The outlet end of the gas booster pump 42 is provided with a first sealed bearing 421. The outlet end of the gas booster pump 42 is in rotational communication with the bottom of the stirring shaft 52 through the first sealed bearing 421. As the stirring shaft 52 rotates, oxygen-containing gas can be continuously supplied to the bottom of the stirring shaft 52.

[0038] In one embodiment of the present invention, Figure 2 As shown, a gas treatment mechanism 3 is provided on one side of the fermentation chamber 1. The gas treatment mechanism 3 is used to purify the gas within the fermentation chamber 1. The gas treatment mechanism 3 includes a gas treatment box 37, a gas flow conduit 33, and a gas wash pipe 34. The gas treatment box 37 is provided on one side of the fermentation chamber 1, and the gas flow conduit 33 is vertically disposed inside the gas treatment box 37. The gas flow conduit 33 communicates with the upper side of the interior of the fermentation chamber 1 through an exhaust pipe 31, and the gas flow conduit 33 runs through the inside of the gas wash pipe 34. A pressure limiting valve 32 is provided on the top of the gas treatment box 37, and a gas return pipe 35 is provided inside the gas treatment box 37. A control valve 36 is provided at the bottom of the gas return pipe 35, and the control valve 36 is connected to the gas supply pipe 41.

[0039] Specifically, during the fermentation process, microorganisms undergo aerobic fermentation to produce harmful gases such as carbon dioxide, ammonia, and hydrogen sulfide. Since the gases continue to accumulate in the fermentation chamber 1, the gases need to be discharged in a timely manner. At this time, a certain concentration of washing liquid is injected into the washing pipe 34 (the main components include water: it can absorb some water-soluble gases such as ammonia. Dilute acid solution: such as dilute sulfuric acid, dilute hydrochloric acid, etc., which can react with alkaline gases such as ammonia to absorb them. Copper sulfate solution: can be used to absorb hydrogen sulfide gas), and the harmful gases produced during the fermentation process are promptly stripped off to prevent them from being directly discharged into the air and causing air pollution.

[0040] In addition, the purified air can be returned to the gas supply pipe 41 through the gas return pipe 35 by opening the control valve 36, and can be used to reuse the oxygen-containing gas, dilute the oxygen concentration of the oxygen-containing gas in the gas supply pipe 41, and reduce the amount of waste gas discharged into the environment.

[0041] In one embodiment of the present invention, Figure 2 As shown, the top of the gas washing pipe 34 is a hollow structure, and the bottom of the gas processing box 37 is provided with a drain port 371 for discharging liquid in the gas washing pipe 34.

[0042] Specifically, during the scrubbing process, as the scrubbing liquid concentration decreases, scrubbing liquid is re-introduced into the scrubbing pipe 34 , and the waste scrubbing liquid flows out through the top of the scrubbing pipe 34 to the gas treatment box 37 and is finally discharged through the drain port 371 .

[0043] In one embodiment of the present invention, Figure 3 As shown, the bottom 11 of the fermentation bin 1 is in contact with the bottom edge of the spiral blade assembly 51 , which can sweep the bottom of the fermentation bin 1 at all times during the stirring process to prevent scaling and clogging of the bottom of the fermentation bin 1 .

[0044] In order to clearly illustrate the above embodiment, refer to Figures 1-6 The specific working principle of the biological feed fermentation equipment of the present invention is as follows: during the process of feed fermentation, the staff first opens the door 2 of the fermentation bin 1, puts the feed to be fermented and the fermentation agent into the fermentation bin 1, and then closes the door 2. The driving component 43 drives the stirring shaft 52 to rotate, and the rotation of the stirring shaft 52 drives the spiral blade component 51 to rotate, thereby stirring the feed in the fermentation bin 1.

[0045] During the stirring process, when the fermentation process encounters caking and hardening, and insufficient stirring, the spiral radius at the bottom of the spiral blade assembly 51 is designed to be larger, so that the feed at the bottom of the fermentation bin 1 can be crushed and stirred, and the feed in the upper part of the fermentation bin 1 will fall due to gravity and then be continuously crushed, and the feed in the fermentation bin 1 is continuously stirred in an up and down cycle.

[0046] Since the spiral radius of the top of the spiral blade assembly 51 is designed to be small, the feed at the bottom of the fermentation bin 1 is transferred upward from the middle position, which can reduce the stirring power of the stirring shaft 52, prevent the feed agglomerated in the fermentation bin 1 from being subjected to concentrated force and moving upward, and thus prevent the agglomerated feed from being ineffectively stirred.

[0047] During the stirring process, oxygen-containing gas is supplied through the air supply pipe 41. This gas then enters the stirring shaft 52 through the air supply pipe 41. The stirring shaft 52 then delivers the oxygen-containing gas to the air injection holes 512 in the spiral blade assembly 51 and discharges it outward. In this way, while the spiral blade assembly 51 is stirring the feed, the stirred feed is exposed to the oxygen-containing gas, thereby providing more optimal fermentation conditions for the aerobic fermentation bacteria in the feed.

[0048] In addition, during the fermentation process, microorganisms undergo aerobic fermentation and produce harmful gases such as carbon dioxide, ammonia, and hydrogen sulfide. Since these gases continue to accumulate in the fermentation chamber 1, they need to be discharged in a timely manner. At this time, by injecting a scrubbing liquid with a certain concentration into the scrubbing pipe 34, the scrubbing liquid's main components include water that can absorb some water-soluble gases such as ammonia, a dilute acid solution such as dilute sulfuric acid and dilute hydrochloric acid that can react with alkaline gases such as ammonia to absorb them, and a copper sulfate solution that can be used to absorb hydrogen sulfide gas, the harmful gases generated during the fermentation process are promptly removed to prevent them from being directly discharged into the air and causing air pollution.

[0049] In summary, the biological feed fermentation equipment of the embodiment of the present invention uses a spiral blade assembly to roll and stir the fermented feed up and down, so that the feed between the upper and lower layers in the fermentation bin is well mixed, and while stirring, oxygen-containing gas is added to the fermented feed on the spiral blade assembly, so that the fermented feed at the bottom of the fermentation bin can also be fully combined with the oxygen in the air, so that the fermentation degree at each position of the fermentation bin can be uniform and stable.

[0050] Because the spiral blade assembly has a larger spiral radius at the bottom, the feed at the bottom of the fermentation bin is crushed and mixed. The feed in the upper part of the fermentation bin falls due to gravity and is continuously crushed. The feed in the fermentation bin is continuously circulated and mixed, eliminating the problems of caking and hardening, as well as insufficient mixing, during the fermentation process.

[0051] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A biological feed fermentation device, characterized in that: It comprises a fermentation chamber (1), and a spiral stirring mechanism (5) and an air supply mechanism (4) arranged inside the fermentation chamber (1); The spiral stirring mechanism (5) comprises a spiral blade assembly (51) and a stirring shaft (52), wherein the stirring shaft (52) is a hollow structure, and the stirring shaft (52) is arranged at a middle position of the spiral blade assembly (51), and the stirring shaft (52) is used to drive the spiral blade assembly (51) to rotate, and an air jet hole (512) is opened on the surface of the spiral blade assembly (51), and the air jet hole (512) is communicated with the interior of the stirring shaft (52); The air supply mechanism (4) is connected to the air jet hole (512), and the air supply mechanism (4) comprises an air supply pipe (41) and a gas booster pump (42), wherein the air supply pipe (41) is connected to the air inlet end of the gas booster pump (42), and the air outlet end of the gas booster pump (42) is communicated with the interior of the stirring shaft (52), so as to pump oxygen into the interior of the stirring shaft (52).

2. The biological feed fermentation equipment according to claim 1, characterized in that: The spiral radius of the spiral blade assembly (51) increases from top to bottom, and the spiral pitch of the spiral blade assembly (51) decreases from top to bottom.

3. The biological feed fermentation equipment according to claim 1, characterized in that: The spiral blade assembly (51) comprises a plurality of trapezoidal blades (511) connected side by side in a stepped manner, and the air injection holes (512) are arranged at the bottoms of the trapezoidal blades (511).

4. The biological feed fermentation equipment according to claim 1, characterized in that: A humidifying mechanism (6) is provided on the top of the stirring shaft (52), and the humidifying mechanism (6) is used to spray and humidify the feed in the fermentation bin (1). The humidifying mechanism (6) includes a boosting water pump (61), a rotating nozzle (62) and a mixing rotary seat (66), wherein the rotating nozzle (62) is provided on the stirring shaft (52), the mixing rotary seat (66) is provided on the top of the stirring shaft (52), the boosting water pump (61) is provided on the top of the fermentation bin (1), and the liquid outlet end of the boosting water pump (61) is rotatably connected to the liquid inlet end of the mixing rotary seat (66), and the liquid outlet end of the mixing rotary seat (66) is communicated with the rotating nozzle (62).

5. The biological feed fermentation equipment according to claim 4, characterized in that: A one-way air valve (65) is provided on the top of the stirring shaft (52), the one-way air valve (65) is in communication with the mixing rotary seat (66), and the top of the one-way air valve (65) is an inverted cone-shaped structure.

6. The biological feed fermentation equipment according to claim 1, characterized in that: A driving assembly (43) is provided at the bottom of the fermentation bin (1), and a power shaft of the driving assembly (43) is connected to the stirring shaft (52).

7. The biological feed fermentation equipment according to claim 6, characterized in that: The gas outlet end of the gas booster pump (42) is provided with a first sealing bearing (421), and the gas outlet end of the gas booster pump (42) is rotatably connected to the bottom of the stirring shaft (52) through the first sealing bearing (421).

8. The biological feed fermentation equipment according to claim 1, characterized in that: A gas treatment mechanism (3) is provided on one side of the fermentation bin (1), and the gas treatment mechanism (3) is used to purify the gas in the fermentation bin (1). The gas treatment mechanism (3) includes a gas treatment box (37), a gas flow guide pipe (33) and a gas washing pipe (34), wherein the gas treatment box (37) is provided on one side of the fermentation bin (1), the gas flow guide pipe (33) is vertically provided inside the gas treatment box (37), the gas flow guide pipe (33) is communicated with the inside of the fermentation bin (1), and the gas flow guide pipe (33) passes through the inside of the gas washing pipe (34).

9. The biological feed fermentation equipment according to claim 8, characterized in that: The top of the gas washing pipe (34) is a hollow structure, and the bottom of the gas treatment box (37) is provided with a drain port (371) for discharging liquid in the gas washing pipe (34); A pressure limiting valve (32) is provided on the top of the gas processing box (37), a gas return pipe (35) is provided inside the gas processing box (37), a control valve (36) is provided at the bottom of the gas return pipe (35), and the control valve (36) is connected to the gas supply pipe (41).

10. The biological feed fermentation equipment according to claim 1, characterized in that: The bottom (11) of the fermentation bin (1) and the bottom edge of the spiral blade assembly (51) are in contact with each other, and a bin door (2) is provided on one side of the fermentation bin (1).

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