A gas dispersion device for microbial fermentation tank

Abstract

The invention discloses a gas diffusion device for a microbial fermentation tank, which relates to the field of microbial engineering technology, comprising a base, characterized in that: a bracket is arranged on the base, a fermentation tank is arranged in the bracket, the bracket is a metal frame, a drain valve is arranged at the lower part of one side of the fermentation tank, an opening is arranged on the upper side of the fermentation tank, the opening is square, and the opening matches a sealing component; an oxygen gas diffusion module is arranged at the bottom of the fermentation tank; the oxygen gas diffusion module comprises a U-shaped base, a U-shaped plate, a U-shaped slide groove, an arc-shaped slider, a connecting rod, a swing rod, a moving block, a slide rail, a screw, a motor cavity, a nozzle and a pipeline. The invention realizes oxygen gas diffusion through the synergistic effect of the oxygen gas diffusion module, the sealing component and the oxygen breaking component, and uniformly spreads a plurality of nozzles along the circumferential direction at the bottom of the fermentation tank, breaks up and aerates the bubbles after the oxygen enters the culture solution, and can effectively improve the utilization rate of oxygen and the fermentation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of microbial engineering, in particular to a gas dispersion device for a microbial fermentation tank. Background Art

[0002] Microbial fermentation is a bioengineering process that uses the metabolic activities of microorganisms to produce useful substances. It is widely used in the fields of food, feed, medicine, chemical industry, etc. In the process of microbial fermentation, the supply of oxygen is one of the important factors affecting the fermentation efficiency and product quality. Usually, oxygen is provided by filling the fermentation tank with compressed air, but this method has some problems, such as: the compressed air contains impurities and moisture, which may contaminate the fermentation tank and the culture medium; the flow rate and pressure of the compressed air are difficult to control, which may cause pressure fluctuations and uneven oxygen concentration in the fermentation tank; the compressed air dispersion position is fixed, resulting in unsatisfactory effects, low oxygen utilization and high energy consumption. Therefore, the development of a device that can effectively disperse air can at least solve some of the above problems and is an urgent need in the field of microbial fermentation technology. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a gas diffusion device for a microbial fermentation tank. Through the synergistic effect of an oxygen diffusion module, a sealing component and an oxygen dispersion component, a plurality of nozzles are evenly distributed in a circumferential direction at the bottom of the fermentation tank to achieve oxygen diffusion. In addition, the oxygen dispersion component is used to achieve strong stirring of the culture solution and dispersion and aeration of bubbles after oxygen enters the culture solution, thereby effectively improving oxygen utilization and fermentation efficiency.

[0004] The present invention adopts the following technical solutions to achieve the purpose of the invention:

[0005] A gas dispersion device for a microbial fermentation tank, comprising a base, characterized in that: a bracket is arranged on the base, a fermentation tank is arranged in the bracket, the bracket is a metal frame, a drain valve is arranged at the lower part of one side of the fermentation tank, an opening is arranged at the upper side of the fermentation tank, the opening is square, and the opening matches a sealing component;

[0006] An oxygen diffusion module is provided at the bottom of the fermentation tank;

[0007] The oxygen diffusion module comprises a U-shaped base, a U-shaped plate, a U-shaped slide, an arc-shaped slider, a connecting rod, a swing rod, a moving block, a slide rail, a screw, a motor cavity, a nozzle and a pipeline, the U-shaped base is fixed to the U-shaped base on which the U-shaped plate is fixed, the U-shaped plate is provided with the U-shaped slide, symmetrical arc-shaped sliders are provided in the U-shaped slide, symmetrical pipelines are respectively fixed on the upper side of each of the arc-shaped sliders, each pair of the pipelines is respectively connected to a group of uniformly arranged nozzles, each of the arc-shaped sliders is respectively hinged to one end of the connecting rod, the other end of each of the connecting rods is respectively hinged to one end of the swing rod, the other end of each of the swing rods is respectively hinged to the upper side of the moving block, and the two moving blocks are both provided in the slide rail, and the slide rail is fixed to one side of the upper part of the U-shaped base;

[0008] The sealing assembly includes an upper cover, a symmetrical long rod, a symmetrical connecting rod, a symmetrical L-shaped clamping rod, a group of bolts and nuts matched therewith, the upper cover matches the opening, the upper two sides of the upper part of the upper cover are respectively fixedly connected to the long rod, the two ends of the long rod are respectively fixedly connected by connecting rods, the lower side of each connecting rod is respectively fixedly connected to the upper end of the vertical rod of the symmetrical L-shaped clamping rod, the end of the cross bar of the L-shaped clamping rod is bent upward, the cross bar of the L-shaped clamping rod can clamp the bracket, each of the bolts passes through an L-shaped clamping rod and the connecting rod, the bolt is threadedly connected to the nut, the upper cover is connected to the oxygen dispersion assembly, and the width of the opening can allow the oxygen dispersion assembly to pass through;

[0009] The oxygen dispersing assembly comprises a driving motor, a circular plate, a second screw, a sleeve, a supporting plate, an arc track, an arc moving block, a connecting block, a main rod of a dispersing rod, a secondary rod of a dispersing rod, a U-shaped hinge block, a limiting swing arm, an inclined rod and a cylinder. The supporting plate fixes the sleeve, the sleeve is threadedly connected to the second screw, the second screw passes through the center hole of the circular plate, the upper end bearing of the second screw is connected to the upper cover, the upper end of the second screw is fixedly connected to the output shaft of the driving motor, the driving motor is fixed on the upper side of the upper cover, a group of the cylinders uniformly arranged in a circle are fixed at the lower edge of the circular plate, the lower end of each of the cylinders is respectively fixedly connected to one end of the arc track, each of the arc track is respectively slidably connected to the arc moving block, the lower end of each of the arc moving blocks is respectively fixedly connected to one end of the connecting block, and the lower end of each of the connecting blocks is respectively fixedly connected to the main rod of the dispersing rod;

[0010] The U-shaped hinge block is fixed in the middle of one side of each arc-shaped moving block, each U-shaped hinge block is hinged to the limiting swing rod, each limiting swing rod is hinged to one end of the inclined rod, and the other ends of all the inclined rods are fixed to the lower edge position of the support plate.

[0011] As a further limitation of the present technical solution, the two ends of the slide rail are respectively connected to the two ends of the screw by bearings, the two ends of the screw are provided with threads in opposite directions, the two ends of the screw are respectively threadedly connected to the two moving blocks, one end of the screw is fixed to the output shaft of the motor fixed in the motor cavity, and the motor cavity fixes one end of the slide rail.

[0012] As a further limitation of the technical solution, one of the nozzles in each group of the nozzles is fixedly connected to an air inlet pipe via a hose, and the two air inlet pipes are respectively fixed to the middle and lower parts of the side walls of the fermentation tank.

[0013] As a further limitation of the technical solution, the middle portion of each main rod of the breaking up rod is fixedly connected to the auxiliary rod of the breaking up rod, and the main rod of the breaking up rod and the auxiliary rod of the breaking up rod are Y-shaped.

[0014] As a further limitation of the present technical solution, the oblique rods are evenly arranged on the circumference of the lower side of the support plate.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] The oxygen diffusion module of the present invention is composed of a U-shaped base, a U-shaped plate, a U-shaped slide, an arc-shaped slider, a connecting rod, a swing rod, a moving block, a slide rail, a screw, a motor cavity, a nozzle and a pipeline, and oxygen diffusion is achieved by evenly distributing a plurality of nozzles along the circumferential direction at the bottom of the fermentation tank;

[0017] The sealing assembly of the present invention is composed of an upper cover, a long rod, a connecting rod, an L-shaped clamping rod, bolts and nuts, which can seal the upper opening of the fermentation tank, and fix the position of the upper cover by clamping the bracket with the L-shaped clamping rod, thereby avoiding the complex structure and a large number of sealing parts required by the traditional flange sealing method;

[0018] The oxygen breaking up component of the present invention is composed of a driving motor, a circular plate, a second screw, a sleeve, a support plate, an arc track, an arc moving block, a connecting block, a main breaking up rod, a secondary breaking up rod, a U-shaped hinge block, a limit swing rod and an inclined rod, so as to realize the reciprocating motion of the breaking up rod, and realize the strong stirring of the culture solution and the breaking up and aeration of bubbles after oxygen enters the culture solution through the oxygen breaking up component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 The three-dimensional Figure 1 .

[0021] Figure 2 The local stereoscopic Figure 1 .

[0022] Figure 3 The local stereoscopic Figure 2 .

[0023] Figure 4 The local stereoscopic Figure 3 .

[0024] Figure 5 The local stereoscopic Figure 4 .

[0025] Figure 6 The local stereoscopic Figure 5 .

[0026] In the figure: 1, driving motor; 2, long rod; 3, upper cover; 4, fermentation tank; 5, bracket; 6, base; 7, drain valve; 8, nut; 9, connecting rod; 10, L-shaped clamping rod; 11, bolt; 12, U-shaped base; 13, slide rail; 14, screw; 15, moving block; 16, motor cavity; 17, swing rod; 18, connecting rod; 19, U-shaped plate; 191, U-shaped slide groove; 20, nozzle; 21, pipeline; 22, arc-shaped slider; 24, round plate; 241, cylinder; 25, screw 2; 26, sleeve; 261, support plate; 27, oblique rod; 28, main rod of the breaking rod; 281, auxiliary rod of the breaking rod; 29, connecting block; 30, arc track; 31, arc-shaped moving block; 311, U-shaped hinge block; 32, limit swing rod; 41, air intake pipe; 42, opening. DETAILED DESCRIPTION

[0027] The following will be combined with the attached embodiment of the present invention Figure 1-Figure 6 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0028] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0029] When a component is referred to as being “located” or “disposed on” another component, it may be on the other component or there may be an intervening component. When a component is referred to as being “connected to” another component, it may be directly connected to the other component or there may be an intervening component.

[0030] On the one hand, the present invention provides a gas dispersion device for a microbial fermentation tank, comprising a base 6, characterized in that: a bracket 5 is arranged on the base 6, a fermentation tank 4 is arranged in the bracket 5, the bracket 5 is a metal frame, a drain valve 7 is arranged at the lower part of one side of the fermentation tank 4, an opening 42 is arranged on the upper side of the fermentation tank 4, the opening 42 is square, and the opening 42 matches the sealing component;

[0031] Wherein, a group of through holes are provided at the bottom of the base 6 to reduce the use of materials and reduce costs;

[0032] An oxygen diffusion module is provided at the bottom of the fermentation tank 4;

[0033] The oxygen diffuser module comprises a U-shaped base 12, a U-shaped plate 19, a U-shaped chute 191, an arc-shaped slider 22, a connecting rod 18, a swing rod 17, a moving block 15, a slide rail 13, a screw 14, a motor cavity 16, a nozzle 20 and a pipeline 21. The U-shaped base 12 is fixed to the U-shaped base 12, the U-shaped plate 19 is fixed to the U-shaped base 12, the U-shaped chute 191 is arranged on the U-shaped plate 19, and the U-shaped chute 191 is provided with symmetrical arc-shaped sliders 22, each of which is provided with a symmetrical arc-shaped slider 22. 2, symmetrical pipes 21 are fixed on the upper side, each pair of pipes 21 is connected to a group of uniformly arranged nozzles 20, each arc-shaped slider 22 is hinged to one end of the connecting rod 18, the other end of each connecting rod 18 is hinged to one end of the swing rod 17, the other end of each swing rod 17 is hinged to the upper side of the moving block 15, the two moving blocks 15 are arranged in the slide rail 13, and the slide rail 13 is fixed to one side of the upper part of the U-shaped base 12.

[0034] The two ends of the slide rail 13 are respectively connected to the two ends of the screw rod 14 by bearings, and the two ends of the screw rod 14 are provided with threads in opposite directions. The two ends of the screw rod 14 are respectively threadedly connected to the two moving blocks 15, and one end of the screw rod 14 is fixed to the output shaft of the motor (not shown) fixed in the motor cavity 16, and the motor cavity 16 fixes one end of the slide rail 13.

[0035] One of the nozzles 20 in each group of the nozzles 20 is fixedly connected to the air inlet pipe 41 via a hose (not shown in the figure), and the two air inlet pipes 41 are respectively fixed to the lower middle part of the side wall of the fermentation tank 4. Since the air inlet pipe 41 and the nozzle 20 are connected via the pipeline 21 and the hose, when the hose is connected to one nozzle 20 to supply air, the gas will enter the other nozzles 20 from the air inlet pipe 41 and be discharged.

[0036] When in use, the motor is controlled to rotate to drive the screw 14 to rotate, and then drive the moving block 15 to reciprocate along the slide rail 13. Since the moving block 15 is hinged to the swing rod 17, and the swing rod 17 is hinged to the connecting rod 18, and the connecting rod 18 is hinged to the arc-shaped slider 22, the movement of the moving block 15 will cause the arc-shaped slider 22 to reciprocate along the U-shaped slide groove 191. Since the arc-shaped slider 22 is fixed to the pipe 21, and the pipe 21 is connected to the nozzle 20, the movement of the arc-shaped slider 22 will drive the nozzle 20 to reciprocate. In this way, the nozzle 20 can be evenly spread in the circumferential direction at the bottom of the fermenter 4, and its position and angle can be adjusted, so as to achieve strong stirring and sufficient aeration of the culture solution. At the same time, one of the nozzles 20 is fixedly connected to the air inlet pipe 41 through a hose, and the two air inlet pipes 41 are respectively fixed at the middle and lower part of the side wall of the fermenter 4, so as to supply compressed oxygen to the nozzle 20.

[0037] The sealing assembly includes an upper cover 3, a symmetrical long rod 2, a symmetrical connecting rod 9, a symmetrical L-shaped clamping rod 10, a group of bolts 11 and nuts 8 matching therewith, the upper cover 3 matches the opening, the upper two sides of the upper part of the upper cover 3 are respectively fixedly connected to the long rod 2, the two ends of the long rod 2 are respectively fixedly connected by connecting rods 9, the lower side of each connecting rod 9 is respectively fixedly connected to the upper end of the vertical rod of the symmetrical L-shaped clamping rod 10, the cross bar end of the L-shaped clamping rod 10 is bent upward, and the cross bar of the L-shaped clamping rod 10 can clamp the bracket 5, each of the bolts 11 passes through an L-shaped clamping rod 10 and the connecting rod 9 respectively, the bolts 11 are threadedly connected to the nut 8, the upper cover 3 is connected to the oxygen dispersion assembly, and the width of the opening can allow the oxygen dispersion assembly to pass through.

[0038] When in use, the L-shaped clamping rod 10 is fixed by tightening or loosening the nut 8. When the upper cover 3 needs to be opened, it is only necessary to remove the nut 8 and the bolt 11, and remove the L-shaped clamping rod 10 from the bracket 5. Since the upper cover 3 is fixed to the long rod 2, and the long rod 2 is fixed to the connecting rod 9, and the connecting rod 9 is fixed to the L-shaped clamping rod 10, the upper cover 3 will not fall off or shift. When sealing is required, the upper cover 3 drives the oxygen scattering assembly through the opening, so that the upper cover 3 covers the opening, the L-shaped clamping rod 10 clamps the bracket 5, and then the bolt 11 is installed and the nut 8 is tightened. The sealing assembly of the present invention has a simple structure, is easy to operate, and has a good sealing effect.

[0039] The oxygen dispersing assembly includes a driving motor 1, a circular plate 24, a screw rod 25, a sleeve 26, a support plate 261, an arc track 30, an arc moving block 31, a connecting block 29, a dispersing rod main rod 28, a dispersing rod auxiliary rod 281, a U-shaped hinge block 311, a limit swing rod 32, an inclined rod 27 and a cylinder 241. The support plate 261 fixes the sleeve 26, and the sleeve 26 is threadedly connected to the screw rod 25. The screw rod 25 passes through the center hole of the circular plate 24. The upper end bearing of the screw rod 25 is connected to the upper cover 3. The screw rod 25 is The upper end is fixedly connected to the output shaft of the driving motor 1, and the driving motor 1 is fixed on the upper side of the upper cover 3. A group of circumferentially evenly arranged cylinders 241 are fixed at the lower edge of the circular plate 24, and the lower end of each of the cylinders 241 is respectively fixedly connected to one end of the arc track 30, and each of the arc track 30 is respectively slidably connected to the arc moving block 31, and the lower end of each of the arc moving blocks 31 is respectively fixedly connected to one end of the connecting block 29, and the lower end of each of the connecting blocks 29 is respectively fixedly connected to the breaking up rod main rod 28.

[0040] The middle part of each of the breaking-up rod main rods 28 is fixedly connected to the breaking-up rod auxiliary rod 281, and the breaking-up rod main rod 28 and the breaking-up rod auxiliary rod 281 are Y-shaped.

[0041] The U-shaped hinge block 311 is fixed in the middle of one side of each arc-shaped moving block 31, each U-shaped hinge block 311 is hinged to the limiting rocker arm 32, each limiting rocker arm 32 is hinged to one end of the inclined rod 27, and the other ends of all the inclined rods 27 are fixed to the lower edge position of the support plate 261.

[0042] The oblique rods 27 are evenly arranged on the circumference of the lower side of the support plate 261 .

[0043] When in use, the screw rod 25 is driven to rotate by controlling the driving motor 1, and then the sleeve 26 is driven to rise and fall, and the sleeve 26 is driven to move up and down along the screw rod 25, and the support plate 261 is driven to move up and down by the support plate 261, and the inclined rod 27 is driven to swing back and forth by the inclined rod 27. Since the circular plate 24 is fixed to the cylinder 241, and the cylinder 241 is fixed to the arc track 30, and the arc track 30 is slidably connected to the arc moving block 31, and the arc moving block 31 is fixed to the connecting block 29, and the connecting block 29 is fixed to the connecting block 29. The connecting block 29 is fixed to the main rod 28 of the breaking rod, so the swing of the limit swing rod 32 will drive the arc moving block 31 to slide back and forth in the arc track 30, and the arc moving block 31 drives the connecting block 29, the main rod 28 of the breaking rod and the auxiliary rod 281 of the breaking rod to reciprocate along the upper part of the fermentation tank 4. Since the main rod 28 of the breaking rod and the auxiliary rod 281 of the breaking rod are fixed, and the main rod 28 of the breaking rod and the auxiliary rod 281 of the breaking rod are Y-shaped, the main rod 28 of the breaking rod and the auxiliary rod 281 of the breaking rod can further stir and break up the culture solution.

[0044] The method of using this embodiment is:

[0045] The fermentation tank 4 is welded and mounted on the bracket 5, and the bracket 5 is fixed on the base 6;

[0046] Secondly, the oxygen diffusion module is placed at the inner bottom of the fermentation tank 4, and the air inlet pipe 41 is connected to the nozzle 20, and the motor chamber 16 is connected to the power supply;

[0047] Then, add a proper amount of culture liquid and microbial strains into the fermentation tank 4, place the sealing assembly on the upper opening 42 of the fermentation tank 4, allow the oxygen scrambling assembly to penetrate into the fermentation tank 4, and allow the L-shaped clamping rod 10 to clamp the bracket 5, install the bolt 11 and tighten the nut 8, so that the upper cover 3 and the opening 42 are sealed;

[0048] Finally, open the drain valve 7, adjust the liquid level of the culture solution, and close the drain valve 7;

[0049] During the fermentation process, the position and angle of the nozzle 20 are adjusted by controlling the speed and direction of the motor, and the movement of the main rod 28 and the auxiliary rod 281 is achieved by controlling the drive motor 1, thereby achieving optimal stirring and aeration of the culture solution.

[0050] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A gas dispersion device for a microbial fermentation tank, comprising a base (6), characterized in that: A support (5) is arranged on the base (6), a fermentation tank (4) is arranged inside the support (5), the support (5) is a metal frame, a drain valve (7) is arranged at a lower part of one side of the fermentation tank (4), an opening (42) is arranged at an upper side of the fermentation tank (4), the opening (42) is square, and the opening (42) matches a sealing component; An oxygen diffusion module is provided at the bottom of the fermentation tank (4); The oxygen diffusion module comprises a U-shaped base (12), a U-shaped plate (19), a U-shaped chute (191), an arc-shaped slider (22), a connecting rod (18), a swing rod (17), a moving block (15), a slide rail (13), a screw rod (14), a motor chamber (16), a nozzle (20) and a pipeline (21), wherein the U-shaped base (12) is fixed to the U-shaped base (12), the U-shaped plate (19) is fixed to the U-shaped base (12), the U-shaped chute (191) is provided on the U-shaped plate (19), a symmetrical arc-shaped slider (22) is provided in the U-shaped chute (191), and each of the U-shaped Symmetrical pipes (21) are fixed to the upper side of the arc-shaped sliders (22); each pair of pipes (21) is connected to a group of uniformly arranged nozzles (20); each arc-shaped slider (22) is hinged to one end of the connecting rod (18); the other end of each connecting rod (18) is hinged to one end of the swing rod (17); the other end of each swing rod (17) is hinged to the upper side of the moving block (15); the two moving blocks (15) are both arranged in the slide rail (13); and the slide rail (13) is fixed to one side of the upper part of the U-shaped base (12); The sealing assembly comprises an upper cover (3), symmetrical long rods (2), symmetrical connecting rods (9), symmetrical L-shaped clamping rods (10), a group of bolts (11) and nuts (8) matched therewith, the upper cover (3) matches the opening, the upper two sides of the upper part of the upper cover (3) are respectively fixedly connected to the long rods (2), the two ends of the long rods (2) are respectively fixedly connected by connecting rods (9), the lower side of each connecting rod (9) is respectively fixedly connected to the upper end of the vertical rod of the symmetrical L-shaped clamping rod (10), the end of the cross rod of the L-shaped clamping rod (10) is bent upward, the cross rod of the L-shaped clamping rod (10) can clamp the bracket (5), each of the bolts (11) passes through one of the L-shaped clamping rods (10) and the connecting rod (9), the bolts (11) are threadedly connected to the nuts (8), the upper cover (3) is connected to the oxygen dispersion assembly, and the width of the opening can allow the oxygen dispersion assembly to pass through; The oxygen dispersing assembly comprises a driving motor (1), a circular plate (24), a second screw rod (25), a sleeve (26), a support plate (261), an arc track (30), an arc moving block (31), a connecting block (29), a main dispersing rod (28), a secondary dispersing rod (281), a U-shaped hinge block (311), a limit swing rod (32), an inclined rod (27) and a cylinder (241). The support plate (261) fixes the sleeve (26), the sleeve (26) is threadedly connected to the second screw rod (25), the second screw rod (25) passes through the center hole of the circular plate (24), and the upper end bearing of the second screw rod (25) is connected to the upper cover (3). The upper end of the second screw rod (25) is fixedly connected to the output shaft of the drive motor (1), the drive motor (1) is fixed to the upper side of the upper cover (3), a group of circumferentially evenly arranged cylinders (241) are fixedly connected to the lower edge of the circular plate (24), the lower end of each cylinder (241) is respectively fixedly connected to one end of the arc track (30), each arc track (30) is respectively slidably connected to the arc moving block (31), the lower end of each arc moving block (31) is respectively fixedly connected to one end of the connecting block (29), and the lower end of each connecting block (29) is respectively fixedly connected to the main rod (28) of the scattering rod; The U-shaped hinge block (311) is fixed to the middle of one side of each arc-shaped moving block (31), each U-shaped hinge block (311) is hinged to the limiting swing rod (32), each limiting swing rod (32) is hinged to one end of the inclined rod (27), and the other ends of all the inclined rods (27) are fixed to the lower edge position of the support plate (261).

2. The gas diffusion device for a microbial fermentation tank according to claim 1, characterized in that: The two ends of the slide rail (13) are respectively connected to the two ends of the screw rod (14) by bearings, the two ends of the screw rod (14) are provided with threads in opposite directions, the two ends of the screw rod (14) are respectively threadedly connected to the two moving blocks (15), one end of the screw rod (14) is fixed to the output shaft of the motor fixed in the motor cavity (16), and the motor cavity (16) is fixed to one end of the slide rail (13).

3. The gas diffusion device for a microbial fermentation tank according to claim 1, characterized in that: One of the nozzles (20) in each group of the nozzles (20) is fixedly connected to an air inlet pipe (41) via a hose, and the two air inlet pipes (41) are respectively fixed to the middle and lower part of the side wall of the fermentation tank (4).

4. The gas diffusion device for a microbial fermentation tank according to claim 1, characterized in that: The middle portion of each of the scattering rod main rods (28) is fixedly connected to the scattering rod auxiliary rod (281), and the scattering rod main rod (28) and the scattering rod auxiliary rod (281) are in a Y shape.

5. The gas diffusion device for a microbial fermentation tank according to claim 1, characterized in that: The oblique rods (27) are evenly arranged on the circumference of the lower side of the support plate (261).

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