Fermentation tank temperature regulating device

Abstract

The present invention relates to the technical field of fermentation tanks, and discloses a fermentation tank temperature regulating device, including: a fermentation tank for itaconic acid fermentation; a support frame for supporting the fermentation tank; a feed port for inputting raw materials; and a discharge port for discharging materials after fermentation. The fermentation tank temperature regulating device is arranged by a homogenizing mechanism. Through this linkage mode, the hot air flow is combined with the stirring action. The traditional heating method usually relies on the heat transfer of the tank wall, resulting in a higher temperature near the tank wall and a lower temperature in the part away from the tank wall. By linking the jet port with the top stirring rod, the heating air flow and stirring are carried out simultaneously, which can break this temperature gradient, reduce the temperature difference, make the temperature in the entire fermentation tank tend to be balanced, ensure that the temperature at each position in the fermentation tank remains consistent, prevent local overheating or overcooling, thereby providing a more stable and uniform environment for the growth of microorganisms and improving the synthesis efficiency of itaconic acid.

Description

Technical Field

[0001] The invention relates to the technical field of fermentation tanks, in particular to a temperature regulating device for a fermentation tank. Background Art

[0002] Itaconic acid fermentation tanks are equipment used to cultivate and ferment microorganisms in the itaconic acid production process. Itaconic acid is an organic acid widely used in fertilizer, plastic, food, pharmaceutical and other industries, usually produced by fermentation. Fermentation tanks play a key role in this process, providing suitable environmental conditions to support the growth of microorganisms and the synthesis of itaconic acid.

[0003] The temperature required for itaconic acid fermentation is usually between 30-37°C, depending on the microbial strain used and the fermentation conditions. Most microorganisms have high activity within this temperature range and can effectively metabolize and produce itaconic acid.

[0004] When heating is performed through the tank wall, heat is mainly transferred from the heating area to the inside of the fermenter through heat conduction. Since the process of heat transfer from the tank wall to the inside is limited by factors such as thermal conductivity and material thickness, the heat conduction of the part farther away from the tank wall is slower, resulting in a higher temperature in the part close to the tank wall and a lower temperature in the part far away from the tank wall. In addition, the liquid in the tank produces a temperature gradient due to the temperature difference. The part with more heat (close to the tank wall) will cause the local liquid to rise, while the colder part (far away from the tank wall) will sink. Although this thermal convection helps heat transfer, under traditional temperature control, it leads to uneven circulation of heat flow, further exacerbating the uneven temperature distribution in the tank. The growth and metabolic activity of microorganisms in different temperature zones will be affected. The part close to the heating area is overheated, resulting in excessive metabolism of the microorganism or inhibition of bacterial growth; while the part far away from the heating area is too cold, resulting in insufficient microbial activity, affecting the synthesis rate of itaconic acid, and may even cause stagnation or death of microorganisms in some areas. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a fermentation tank temperature regulating device, which solves the problem of uneven temperature gradient and heat convection caused by heating the tank wall, thereby affecting the growth of microorganisms and the synthesis rate of itaconic acid and reducing the fermentation efficiency.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fermentation tank temperature regulating device, comprising: a fermentation tank, used for itaconic acid fermentation; a support frame, used to support the fermentation tank; a feed port, used to input raw materials; a discharge port, used to discharge materials after fermentation is completed; a homogenizing mechanism, used to heat and stir the materials by means of heated airflow; a strengthening mechanism, used to further grind and clumped materials; and a reflux mechanism, used to secondary recover the airflow discharged upward from the homogenizing mechanism.

[0009] Preferably, the support frame is fixedly connected to the outer wall of the fermentation tank, a feed inlet is provided at the top of the fermentation tank, and a discharge outlet is provided at the bottom of the fermentation tank.

[0010] Preferably, the homogenizing mechanism includes a blower, the top of the blower is fixedly connected to one end of an air intake conveying pipe, the other end of the air intake conveying pipe is fixedly connected to a spindle pipe, the bottom of the spindle pipe is rotatably connected to a top disc block, the outer wall of the top disc block is fixedly connected to a top stirring rod, and an air jet is opened on the inner wall of the top stirring rod.

[0011] Preferably, the main shaft pipe is fixedly connected to the inner wall of the fermentation tank, the inner wall of the main shaft pipe is communicated with the inner wall of the top disc block, and the inner wall of the top disc block is communicated with the inner wall of the top stirring rod.

[0012] Preferably, the air jet is arranged on the side of the top stirring rod, and a plurality of the air jets are provided, and the air jets are arranged in an array.

[0013] Preferably, the reinforcing mechanism includes a top gear ring, which is opened at the bottom of the top disc block, a bottom fixed column is fixedly connected to the inner wall of the fermenter, the outer wall of the bottom fixed column is rotatably connected to the bottom disc block, a bottom gear ring is arranged on the top of the bottom disc block, the outer wall of the bottom fixed column is rotatably connected to a bevel gear, the outer wall of the bottom disc block is fixedly connected to a bottom stirring rod, the outer wall of the bottom stirring rod is fixedly connected to an arc-shaped sheet, and an annular baffle is fixedly connected to the inner wall of the fermenter.

[0014] Preferably, the bevel gears are meshed with the top gear ring and the bottom gear ring respectively, the arc-shaped sheet is an arc-shaped plate, and the annular baffle is low in the middle and high around.

[0015] Preferably, the reflux mechanism includes a top reflux pipe, the top of the fermentation tank is fixedly connected with the top reflux pipe, the inner wall of the fermentation tank is provided with a hollow interlayer, the bottom of the fermentation tank is fixedly connected with one end of a bottom exhaust port, the other end of the bottom exhaust port is fixedly connected with an insulation frame, and the inner wall of the insulation frame is fixedly connected with a constant temperature heating element.

[0016] Preferably, the outer wall of the insulation frame is connected to the air inlet of the blower, one end of the top reflux pipe is connected to the inner wall of the fermentation tank, and the other end of the top reflux pipe is connected to the inner wall of the hollow interlayer.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a fermentation tank temperature regulating device, which has the following beneficial effects:

[0019] 1. The temperature regulating device of the fermentation tank is set up with a homogenizing mechanism. Through this linkage mode, the hot air flow is combined with the stirring action. The traditional heating method usually relies on the heat transfer of the tank wall, resulting in a higher temperature near the tank wall and a lower temperature in the part away from the tank wall. However, through the linkage of the jet port and the top stirring rod, the heating air flow and stirring are carried out at the same time, which can break this temperature gradient, reduce the temperature difference, make the temperature in the whole fermentation tank tend to be balanced, ensure that the temperature at each position in the fermentation tank remains consistent, prevent local overheating or overcooling, thereby providing a more stable and uniform environment for the growth of microorganisms and improving the synthesis efficiency of itaconic acid.

[0020] 2. The temperature regulating device of the fermentation tank is set up with a strengthening mechanism. The top stirring rod and the bottom stirring rod rotate and stir in opposite directions. The bottom stirring rod is located at the bottom of the air jet, which can cut the ejected airflow, so that the airflow ejected from the air jet is broken up and mixed with the material more evenly. The top stirring rod and the bottom stirring rod rotate in opposite directions. Through the stirring of the material, the temperature gradient can be effectively broken and the heat transfer efficiency can be improved. The material and the hot airflow are mixed more evenly, avoiding the phenomenon of local overheating or overcooling. The bottom stirring rod cuts the ejected airflow, making the airflow more dispersed and fully in contact with the material, avoiding the airflow being concentrated in a certain position, thereby helping the heat to be more evenly distributed in the entire fermentation tank, further improving the uniformity of temperature.

[0021] 3. The temperature regulating device of the fermentation tank is set up by a reflux mechanism. The ejected air enters the hollow interlayer upward through the top reflux pipe. The hollow interlayer forms a secondary heat preservation for the fermentation tank, and then enters the heat preservation frame through the bottom exhaust port at the bottom of the hollow interlayer. The air in the heat preservation frame is heated by the constant temperature heating element, and finally enters the blower. Through the recycling of the airflow, the waste heat of the exhausted air is fully utilized. Through the secondary heat preservation effect of the hollow interlayer, the interference of the external environment on the temperature in the fermentation tank can be reduced, and the stability of the internal temperature can be ensured. The heat preservation frame and the constant temperature heating element further heat the air in the heat preservation frame to ensure that even if the hot air flow has been discharged, the uniformity of the internal temperature of the fermentation tank can be maintained by recovering the waste heat, and the rapid drop of local temperature can be avoided. Through the recycling of the ejected airflow in the system, the heat is fully recovered and reused, avoiding heat waste. This not only improves the efficiency of energy use, but also maintains the stability of the temperature in the fermentation tank, and prevents the influence of temperature fluctuations on the fermentation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a fermentation tank temperature regulating device proposed by the present invention;

[0023] Figure 2 A schematic diagram of the cross-sectional structure of a fermentation tank of a fermentation tank temperature regulating device proposed by the present invention;

[0024] Figure 3 This is a structural schematic diagram of a gas jet outlet of a fermentation tank temperature regulating device proposed by the present invention;

[0025] Figure 4 This is a structural schematic diagram of a strengthening mechanism of a fermentation tank temperature regulating device proposed by the present invention;

[0026] Figure 5 This is a structural schematic diagram of an annular baffle of a fermentation tank temperature regulating device proposed by the present invention;

[0027] Figure 6 The present invention provides a schematic cross-sectional structure diagram of a constant temperature heating element of a fermentation tank temperature regulating device.

[0028] In the figure: 1. fermentation tank; 2. support frame; 3. feed port; 4. discharge port; 5. homogenizing mechanism; 51. blower; 52. air intake pipeline; 53. main shaft pipeline; 54. top disc block; 55. top stirring rod; 56. air jet; 6. strengthening mechanism; 61. top gear ring; 62. bottom fixed column; 63. bottom disc block; 64. bottom gear ring; 65. bevel gear; 66. bottom stirring rod; 67. arc sheet; 68. annular baffle; 7. reflux mechanism; 71. top reflux pipe; 72. hollow interlayer; 73. bottom exhaust port; 74. insulation frame; 75. constant temperature heating element. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 6 , a fermentation tank temperature regulating device, comprising: a fermentation tank 1, used for itaconic acid fermentation, providing suitable environmental conditions to support the growth and acid production of microorganisms; a support frame 2, used to support the fermentation tank 1, to ensure that the fermentation tank 1 is stably fixed during the fermentation process, to avoid the fermentation tank 1 from tilting or moving due to gravity or external force, and usually using solid materials and designs to ensure the safe operation of the fermentation tank 1; a feed port 3, used for the input of raw materials, allowing the required culture medium, nutrients or other raw materials to enter the fermentation tank 1 according to a set ratio, to ensure that the microorganisms obtain sufficient nutrition during the fermentation process to support their growth and the synthesis of itaconic acid; a discharge port 4, used to discharge materials after the fermentation is completed, to facilitate the discharge of products, waste and unreacted raw materials in the fermentation liquid from the fermentation tank 1, to ensure Ensure the smooth completion of the fermentation process and provide convenience for subsequent cleaning and maintenance; the homogenizing mechanism 5 is used to heat and stir the material through the heated air flow, ensure the uniformity of the material in the fermentation tank 1, promote heat transfer and material mixing, improve the fermentation efficiency, and help control the temperature distribution to avoid local overheating or overcooling; the strengthening mechanism 6 is used to further grind the agglomerated material to ensure the uniform flow of the material in the fermentation tank 1, avoid the agglomerated material affecting the fermentation efficiency, and ensure that the microorganisms can fully contact the raw materials to promote the synthesis of itaconic acid; the reflux mechanism 7 is used to recycle the airflow discharged upward by the homogenizing mechanism 5 to avoid heat waste, improve energy utilization efficiency through the reuse of the reflux airflow, maintain the stability of the temperature in the fermentation tank 1, and reduce energy consumption and costs.

[0031] The support frame 2 is fixedly connected to the outer wall of the fermentation tank 1 . A feed inlet 3 is provided at the top of the fermentation tank 1 , and a discharge outlet 4 is provided at the bottom of the fermentation tank 1 .

[0032] The homogenizing mechanism 5 includes a blower 51, which is used to blow out hot air. The top of the blower 51 is fixedly connected to one end of an air intake conveying pipe 52, and the other end of the air intake conveying pipe 52 is fixedly connected to a spindle pipe 53. The bottom of the spindle pipe 53 is rotatably connected to a top disc block 54, and the outer wall of the top disc block 54 is fixedly connected to a top stirring rod 55. The inner wall of the top stirring rod 55 is provided with an air jet 56. The spindle pipe 53 is fixedly connected to the inner wall of the fermentation tank 1, and the inner wall of the spindle pipe 53 is communicated with the inner wall of the top disc block 54, and the inner wall of the top disc block 54 is communicated with the inner wall of the top stirring rod 55. The hot air blown out by the blower 51 passes through the air intake conveying pipe 52. , the spindle pipe 53, the top disc block 54 and the inner wall of the top stirring rod 55, and finally ejected through the air jet 56, the air jet 56 is arranged on the side of the top stirring rod 55, and a plurality of air jets 56 are arranged in an array. When the air jet 56 ejects air, since the air jet 56 is arranged obliquely, the reaction force of the air jet from the air jet 56 drives the top stirring rod 55 to rotate. Through the combined action of air jet and stirring, the material in the fermentation tank 1 is evenly heated to ensure that the heat is more evenly distributed in the material. At the same time, stirring helps the material to be fully mixed, thereby improving the heat transfer efficiency, preventing the local temperature from being too high or too low, optimizing the fermentation environment, and improving the synthesis efficiency of itaconic acid.

[0033] The reinforcing mechanism 6 includes a top gear ring 61, which is arranged at the bottom of the top disc block 54. A bottom fixed column 62 is fixedly connected to the inner wall of the fermenter 1. The outer wall of the bottom fixed column 62 is rotatably connected to the bottom disc block 63. A bottom gear ring 64 is arranged on the top of the bottom disc block 63. A bevel gear 65 is rotatably connected to the outer wall of the bottom fixed column 62. A bottom stirring rod 66 is fixedly connected to the outer wall of the bottom disc block 63. An arc-shaped piece 67 is fixedly connected to the outer wall of the bottom stirring rod 66. An annular baffle 68 is fixedly connected to the inner wall of the fermenter 1. The bevel gear 65 is meshed with the top gear ring 61 and the bottom gear ring 64 respectively. The arc-shaped piece 67 is an arc-shaped plate. The annular baffle 68 is low in the middle and high around. When the bubble moves to this place, it will impact the annular baffle 68. Under the action of the annular baffle 68, a part of the bubble is moved downward, so that the bubble of the hot air flow is in contact with the reactant for a longer time. The top stirring rod 55 drives the top disc block 54 to rotate clockwise, the top stirring rod 55 drives the top gear ring 61 to rotate clockwise, the top gear ring 61 drives the bottom gear ring 64 to rotate counterclockwise through the bevel gear 65, the bottom gear ring 64 drives the bottom disc block 63 to rotate counterclockwise, the bottom disc block 63 drives the bottom stirring rod 66 and the arc-shaped piece 67 to rotate counterclockwise, so that the top stirring rod 55 and the bottom stirring rod 66 rotate and stir in opposite directions, and the bottom stirring rod 66 is located at the bottom of the air jet 56, which can cut the ejected airflow, so that the airflow ejected from the air jet 56 is broken up and mixed with the material more evenly, and the top stirring rod 55 and the bottom stirring rod 66 rotate in opposite directions.

[0034] The reflux mechanism 7 includes a top reflux pipe 71, to which the top of the fermentation tank 1 is fixedly connected, a hollow interlayer 72 is provided on the inner wall of the fermentation tank 1, one end of a bottom exhaust port 73 is fixedly connected to the bottom of the fermentation tank 1, an insulation frame 74 is fixedly connected to the other end of the bottom exhaust port 73, a constant temperature heating element 75 is fixedly connected to the inner wall of the insulation frame 74, an outer wall of the insulation frame 74 is connected to the air inlet of the blower 51, so that the airflow heated by the constant temperature heating element 75 in the insulation frame 74 enters the blower 51, one end of the top reflux pipe 71 is connected to the inner wall of the fermentation tank 1, and the other end of the top reflux pipe 71 is connected to the inner wall of the hollow interlayer 72. The ejected air passes upward through the top return pipe 71 and enters the hollow interlayer 72 , which forms secondary insulation for the fermentation tank 1 . The ejected air then passes through the bottom exhaust port 73 at the bottom of the hollow interlayer 72 and enters the insulation frame 74 . The air in the insulation frame 74 is then heated by the constant temperature heating element 75 , and finally enters the blower 51 .

[0035] In summary, when the fermentation tank temperature regulating device is used, the material required for itaconic acid fermentation is put in through the feed port 3, and then the blower 51 is turned on to input the hot air into the main shaft pipe 53 through the air intake conveying pipe 52, and then enters the top disc block 54 through the main shaft pipe 53, and then enters the top stirring rod 55 and finally discharges through the air jet 56. The reaction force of the air jet from the air jet 56 drives the top stirring rod 55 to rotate, which is similar to the principle of jet propulsion. When the airflow is ejected from the air jet 56 at a certain speed and direction, according to Newton's third law-action and reaction are equal and opposite, the ejected airflow will generate a reaction force at the air jet 56, pushing the top stirring rod 55 to rotate, thereby realizing the stirring action, and the top stirring rod 55 drives the air jet 56 to rotate and eject the air so that the ejected airflow covers the materials in the entire fermentation tank 1 more evenly, helping the heating and stirring of the materials, thereby optimizing the heat distribution and promoting the mixing of the materials. Through this linkage mode, the hot air flow is combined with the stirring action. The traditional heating method usually relies on the heat transfer of the tank wall, resulting in a higher temperature near the tank wall and a lower temperature in the part away from the tank wall. However, through the linkage of the air jet 56 and the top stirring rod 55, the heating air flow and stirring are carried out simultaneously, which can break this temperature gradient, reduce the temperature difference, make the temperature in the entire fermentation tank 1 tend to be balanced, ensure that the temperature at each position in the fermentation tank 1 is consistent, prevent local overheating or overcooling, thereby providing a more stable and uniform environment for the growth of microorganisms, and improve the synthesis efficiency of itaconic acid.

[0036] At this time, the top stirring rod 55 drives the top disc block 54 to rotate clockwise, the top stirring rod 55 drives the top gear ring 61 to rotate clockwise, the top gear ring 61 drives the bottom gear ring 64 to rotate counterclockwise through the bevel gear 65, the bottom gear ring 64 drives the bottom disc block 63 to rotate counterclockwise, the bottom disc block 63 drives the bottom stirring rod 66 and the arc-shaped piece 67 to rotate counterclockwise, so that the top stirring rod 55 and the bottom stirring rod 66 rotate and stir in opposite directions, and the bottom stirring rod 66 is located at the bottom of the air jet 56, which can cut the ejected airflow, so that the airflow ejected from the air jet 56 is broken and mixed with the material more evenly, the top stirring rod 55 and the bottom stirring rod 66 rotate in opposite directions to each other, and the temperature gradient can be effectively broken by stirring the material, thereby improving the heat transfer efficiency. The material and the hot air flow are mixed more evenly, avoiding local overheating or overcooling. The bottom stirring rod 66 cuts the ejected air flow, making the air flow more dispersed and fully in contact with the material, avoiding the air flow from concentrating at a certain position, thereby helping to distribute the heat more evenly throughout the fermentation tank 1, further improving the temperature uniformity.

[0037] At this time, the ejected air enters the hollow interlayer 72 upward through the top return pipe 71, and the hollow interlayer 72 forms a secondary insulation for the fermenter 1, and then enters the insulation frame 74 through the bottom exhaust port 73 at the bottom of the hollow interlayer 72, and then heats the air in the insulation frame 74 through the constant temperature heating element 75, and finally enters the blower 51. Through the recycling of the airflow, the exhaust air waste heat is fully utilized. Through the secondary insulation effect of the hollow interlayer 72, the interference of the external environment on the temperature in the fermenter 1 can be reduced, and the stability of the internal temperature can be ensured. The insulation frame 74 and the constant temperature heating element 75 further heat the air in the insulation frame 74 to ensure that even if the hot air flow has been discharged, the uniformity of the internal temperature of the fermenter 1 can be maintained by recycling the waste heat, and the rapid drop of the local temperature can be avoided. Through the recycling of the ejected airflow in the system, the heat is fully recovered and reused, avoiding heat waste. This not only improves the efficiency of energy use, but also maintains the stability of the temperature in the fermenter 1, and prevents the influence of temperature fluctuations on the fermentation process.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A fermentation tank temperature regulating device, characterized in that: include: A fermentation tank (1) for itaconic acid fermentation; A support frame (2) used for supporting the fermentation tank (1); A feed port (3) for inputting raw materials; A discharge port (4) is used to discharge the material after fermentation is completed; A homogenizing mechanism (5) for heating and stirring the material by means of a heated air flow; A strengthening mechanism (6) for further mincing the agglomerated material; The reflux mechanism (7) is used for secondary recovery of the airflow discharged upward from the homogenizing mechanism (5).

2. A fermentation tank temperature regulating device according to claim 1, characterized in that: The support frame (2) is fixedly connected to the outer wall of the fermentation tank (1); a feed inlet (3) is provided at the top of the fermentation tank (1); and a discharge outlet (4) is provided at the bottom of the fermentation tank (1).

3. A fermentation tank temperature regulating device according to claim 1, characterized in that: The homogenizing mechanism (5) comprises a blower (51), the top of the blower (51) is fixedly connected to one end of an air intake conveying pipeline (52), the other end of the air intake conveying pipeline (52) is fixedly connected to a spindle pipeline (53), the bottom of the spindle pipeline (53) is rotatably connected to a top disc block (54), the outer wall of the top disc block (54) is fixedly connected to a top stirring rod (55), and an air jet (56) is provided on the inner wall of the top stirring rod (55).

4. A fermentation tank temperature regulating device according to claim 3, characterized in that: The main shaft pipe (53) is fixedly connected to the inner wall of the fermentation tank (1), the inner wall of the main shaft pipe (53) is connected to the inner wall of the top disc block (54), and the inner wall of the top disc block (54) is connected to the inner wall of the top stirring rod (55).

5. A fermentation tank temperature regulating device according to claim 3, characterized in that: The air jets (56) are arranged on the side of the top stirring rod (55), and a plurality of the air jets (56) are arranged in an array.

6. A fermentation tank temperature regulating device according to claim 3, characterized in that: The reinforcing mechanism (6) comprises a top gear ring (61), wherein the top gear ring (61) is provided at the bottom of the top disc block (54), a bottom fixing column (62) is fixedly connected to the inner wall of the fermentation tank (1), the outer wall of the bottom fixing column (62) is rotatably connected to the bottom disc block (63), a bottom gear ring (64) is arranged at the top of the bottom disc block (63), the outer wall of the bottom fixing column (62) is rotatably connected to the bevel gear (65), the outer wall of the bottom disc block (63) is fixedly connected to the bottom stirring rod (66), the outer wall of the bottom stirring rod (66) is fixedly connected to the arc-shaped sheet (67), and an annular baffle (68) is fixedly connected to the inner wall of the fermentation tank (1).

7. A fermentation tank temperature regulating device according to claim 6, characterized in that: The bevel gear (65) is meshed with the top gear ring (61) and the bottom gear ring (64) respectively. The arc-shaped sheet (67) is an arc-shaped plate. The annular baffle (68) is low in the middle and high around.

8. A fermentation tank temperature regulating device according to claim 6, characterized in that: The reflux mechanism (7) comprises a top reflux pipe (71), the top of the fermentation tank (1) is fixedly connected to the top reflux pipe (71), the inner wall of the fermentation tank (1) is provided with a hollow interlayer (72), the bottom of the fermentation tank (1) is fixedly connected to one end of a bottom exhaust port (73), the other end of the bottom exhaust port (73) is fixedly connected to a heat preservation frame (74), and the inner wall of the heat preservation frame (74) is fixedly connected to a constant temperature heating element (75).

9. A fermentation tank temperature regulating device according to claim 8, characterized in that: The outer wall of the heat preservation frame (74) is connected to the air inlet of the blower (51), one end of the top reflux pipe (71) is connected to the inner wall of the fermentation tank (1), and the other end of the top reflux pipe (71) is connected to the inner wall of the hollow interlayer (72).

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