CN220300692U - Can break away from fermentation cylinder of inside bubble of zymotic fluid - Google Patents

Abstract

The utility model discloses a fermentation tank capable of separating bubbles in fermentation liquor, belonging to the technical field of fermentation tank ammonia concentration regulation, which comprises a fermentation tank, an air injection pipe and a guide plate; the fermentation cylinder is the closed tank body, the inside vertical stirring rake that has set up of fermentation cylinder, the fermentation cylinder outside has set up agitator motor, the upper end of stirring rake stretches out the fermentation cylinder and vertically connects in agitator motor's drive shaft, agitator motor's drive shaft is vertical to be set up, can be through the injection of air, the continuous ammonia in the fermentation broth is through the bubble parcel of air to contain ammonia and take away together, thereby reduce the ammonia concentration in the fermentation broth, and can also stir the fermentation broth from top to bottom through waterfall flow board and guide plate, make the fermentation broth constantly be lifted and form the cascade, thereby expose the fermentation broth in gaseous, make ammonia and the liquid in the fermentation broth fully break away from, thereby keep the pH value in the fermentation broth steady.

Description

Can break away from fermentation cylinder of inside bubble of zymotic fluid

Technical Field

The utility model relates to the technical field of ammonia concentration regulation of a fermentation tank, in particular to a fermentation tank capable of separating bubbles in fermentation liquid.

Background

Fermentation tank refers to an apparatus used industrially for carrying out microbial fermentation. The main body is a main cylinder made of stainless steel plate, and the volume of the main cylinder is 1 cubic meter to hundreds of cubic meters. The design and the processing need to have strict structure and reasonable strength.

The fermenter also needs to be resistant to steam sterilization, has a certain operational flexibility, minimizes internal angles, has strong material and energy transfer properties, and can be adjusted to facilitate cleaning, reduce pollution, be suitable for production of a variety of products, and reduce energy consumption.

In the fermentation process, ammonia gas is generated by microorganisms such as bacteria and fungi, and the generation of the ammonia gas can influence the pH value of fermentation liquor, and when the pH value is changed beyond a certain limit, the growth of cells of microorganisms in a fermentation tank can be influenced, and even the cells enter into a decay period in advance, so that the fermentation state of the microorganisms can be seriously influenced.

The microorganisms are uniformly distributed in the fermentation liquor, so that the generated ammonia is generally contained in the fermentation liquor, the ammonia contained in the fermentation liquor is difficult to stir and leave, especially the ammonia in the fermentation liquor at the bottom of the fermentation tank cannot be discharged at all, the ammonia can directly cause the pH value to change, namely the more the microorganisms ferment, the pH value of the fermentation liquor can be influenced, the microorganisms in the fermentation tank are used in various combinations, and the pH value change can cause death or dormancy of one or more microorganisms, so that the fermentation fails.

Based on the above, the utility model designs a fermentation tank capable of separating bubbles in fermentation liquor so as to solve the problems.

Disclosure of Invention

The utility model aims to provide a fermentation tank capable of separating bubbles in fermentation liquor, ammonia in the fermentation liquor can be continuously wrapped by ammonia bubbles in the air through air injection, and ammonia is contained and taken away together, so that the ammonia concentration in the fermentation liquor is reduced, the fermentation liquor can be continuously lifted to form a water curtain through stirring the fermentation liquor up and down by a waterfall flow plate and a guide plate, so that the fermentation liquor is exposed in the air, the ammonia in the fermentation liquor is sufficiently separated from the liquid, the pH value in the fermentation liquor is kept stable, and microorganisms in the fermentation liquor can be continuously fermented in a proper pH value.

The utility model is realized in the following way: a fermenter capable of releasing bubbles within a fermentation broth, comprising:

the fermentation tank, the gas injection pipe and the guide plate;

the fermentation tank is a closed tank body, a stirring paddle is vertically arranged in the fermentation tank, a stirring motor is arranged outside the fermentation tank, the upper end of the stirring paddle extends out of the fermentation tank and is vertically connected to a driving shaft of the stirring motor, and the driving shaft of the stirring motor is vertically arranged;

the outer end of the gas injection pipe extends out of the fermentation tank and is connected with an externally connected sterile air pipeline, the inner end of the gas injection pipe is connected with a circular gas outlet ring pipe, a plurality of gas aeration holes are uniformly formed in the gas outlet ring pipe, and each gas aeration hole is communicated with the gas injection pipe through the gas outlet ring pipe;

the baffle is the arc, the baffle is the heliciform extends in succession and leans on the inner wall of fermentation cylinder, the lower extreme of baffle sets up in the bottom of fermentation cylinder, the upper end of baffle stretches out above the liquid level of fermentation cylinder inside, the upper end of baffle has set up the waterfall flow board, a plurality of scattered flow holes have evenly been seted up on the waterfall flow board, the scattered flow hole pierces through the upper and lower two sides of waterfall flow board.

Further, the horizontal stable of ring canal that gives vent to anger erects in fermentation cylinder inner chamber bottom, the ring canal that gives vent to anger is the pipeline that becomes whole to be the ring shape by the pipe bending, the ring canal that gives vent to anger is monolithic structure with annotating the trachea, a plurality of the aeration holes ring is established in the bottom outside of ring canal that gives vent to anger.

Further, the cross section of the guide plate is of a groove-shaped structure with two high ends and a low middle, and the transverse width d of the guide plate is between 5 cm and 10 cm;

the waterfall flow plate and the guide plate are connected into an integral structure, the waterfall flow plate extends out of the position 10-20cm above the liquid level in the fermentation tank, the waterfall flow plate is an arc-shaped screen plate with the periphery open, and the aperture of the waterfall flow plate is between 0.5 cm and 2 cm;

neither the waterfall flow plate nor the guide plate is in contact with the stirring paddle, the gas injection pipe and the gas outlet ring pipe.

Further, a defoaming pipe, a gas-liquid separator and a buffer tank are further arranged on the fermentation tank, the outer end of the defoaming pipe is communicated with an externally connected sterile air pipeline, the inner end of the defoaming pipe is arranged at the top of an inner cavity of the fermentation tank, and a nozzle is arranged at the inner end of the defoaming pipe;

the gas outlet end of the gas-liquid separator is connected with the gas inlet end of the buffer tank, the gas inlet end of the gas-liquid separator is vertically and hermetically communicated with the top of the inner cavity of the fermentation tank, and the gas outlet end of the buffer tank is communicated with the outside.

The beneficial effects of the utility model are as follows: 1. according to the utility model, the air filling pipe is added, so that sterile air is filled into the bottom of the fermentation tank, and the air is uniformly dispersed and aerated in the fermentation liquid, so that air is continuously provided for microorganisms, and meanwhile, fine ammonia gas in the fermentation liquid can be contained by the air filling to form larger bubbles, and the ammonia gas is carried away from the fermentation liquid;

2. through the cooperation of the stirring paddles and the spiral guide plates, the fermentation liquor is continuously stirred and can be turned up and down, the fermentation tank is continuously stirred by the centrifugal force of the stirring paddles to spread on the inner wall, the extrusion force of the fermentation liquor continuously rises along the guide plates, and the extrusion force of the fermentation liquor returns to the center of the top of the fermentation tank to be downwards supplemented at the blades of the stirring paddles to form a turning effect, so that the fermentation liquor is continuously circulated, fine ammonia bubbles in the fermentation liquor are mutually fused by stirring and rising, become larger bubbles, and obtain enough buoyancy to be lifted away from the fermentation liquor, thereby avoiding overlarge ammonia concentration in the fermentation liquor;

3. the waterfall flow plate is arranged above the fermentation liquid level, the centrifugal force generated by stirring the fermentation liquid can rise along the guide plate, the fermentation liquid rising to the waterfall flow plate can fall after losing power, the waterfall flow plate can be flushed out, the waterfall flow plate can fall along the scattering holes to form a water curtain, so that the fermentation liquid can be fully scattered, ammonia in the fermentation liquid can be fully scattered, the ammonia is separated from the fermentation liquid, the purpose of reducing the concentration of the ammonia is achieved, the fermentation liquid at the bottom of the fermentation tank can continuously rise along the guide plate to flush the waterfall flow plate, the effect of continuously separating the ammonia in the fermentation liquid is achieved, and the pH value in the fermentation liquid is effectively controlled to be in a proper range.

Drawings

The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.

FIG. 1 is a schematic view of the external structure of the present utility model;

FIG. 2 is a schematic diagram of the internal structure of the fermenter according to the present utility model;

FIG. 3 is a schematic diagram showing the distribution of baffles in a fermenter according to the present utility model;

FIG. 4 is a top view of the top structure of the fermenter according to the present utility model;

FIG. 5 is a schematic top view of an outlet grommet according to the present utility model;

fig. 6 is a schematic end view of the lowermost end of the baffle of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

the device comprises a fermentation tank 1, a defoaming pipe 11, a gas-liquid separator 12, a buffer tank 13, a gas injection pipe 2, a gas outlet ring pipe 21, a gas aeration hole 22, a guide plate 3, a waterfall plate 31, a diffusing hole 32, a stirring motor 4 and a stirring paddle 41.

Detailed Description

Referring to fig. 1 to 6, the present utility model provides a technical solution: a fermenter capable of releasing bubbles within a fermentation broth, comprising:

a fermentation tank 1, an air injection pipe 2 and a guide plate 3;

the fermentation tank 1 is a closed tank body, a stirring paddle 41 is vertically arranged inside the fermentation tank 1, a stirring motor 4 is arranged outside the fermentation tank 1, the upper end of the stirring paddle 41 extends out of the fermentation tank 1 and is vertically connected to a driving shaft of the stirring motor 4, and the driving shaft of the stirring motor 4 is vertically arranged;

the outer end of the gas injection pipe 2 extends out of the fermentation tank 1 and is connected with an externally connected sterile air pipeline, the inner end of the gas injection pipe 2 is connected with a circular gas outlet ring pipe 21, a plurality of aeration holes 22 are uniformly formed in the gas outlet ring pipe 21, and each aeration hole 22 is communicated with the gas injection pipe 2 through the gas outlet ring pipe 21;

the baffle 3 is the arc, the baffle 3 extends in succession and leans on the inner wall of fermentation cylinder 1 in spiral form, the lower extreme setting of baffle 3 is in the bottom of fermentation cylinder 1, the upper end of baffle 3 stretches out in the inside liquid level top of fermentation cylinder 1, the upper end of baffle 3 has set up waterfall flow board 31, a plurality of scattered flow holes 32 have evenly been seted up on the waterfall flow board 31, the upper and lower two sides of waterfall flow board 31 are penetrated to scattered flow hole 32, can be through the injection of air, the ammonia in the fermentation cylinder is wrapped up it through the bubble of air to contain ammonia together, thereby reduce the ammonia concentration in the fermentation cylinder, and can also stir the fermentation cylinder from top to bottom through waterfall flow board 31 and baffle 3, make the fermentation cylinder constantly rise to form the cascade, thereby disperse the exposure in gaseous with the ammonia in the fermentation cylinder, make the ammonia and the liquid in the fermentation cylinder fully break away, thereby keep the pH value in the fermentation cylinder steady, make the microorganism in the fermentation cylinder can keep in the suitable pH value constantly to ferment.

The air outlet ring pipe 21 is a pipe which is formed by bending round pipes and is in a circular ring shape integrally, the air outlet ring pipe 21 and the air injection pipe 2 are in an integral structure, the aeration holes 22 are annularly arranged at the outer side of the bottom of the air outlet ring pipe 21 and are obliquely opened along the direction of a liquid rotation tangent line, so that the rotation of fermentation liquor is facilitated, the air dispersion and dissolution are facilitated, the ammonia gas overflow is driven by the air dispersion and dissolution into the fermentation liquor, the air is uniformly dispersed in the fermentation tank 1, the full contact is facilitated, and the ammonia gas can be wrapped and taken away while oxygen is provided for the fermentation liquor in the fermentation tank 1;

the cross section of the guide plate 3 is of a groove-shaped structure with two high ends and a low middle part, the transverse width d of the guide plate 3 is between 5 cm and 10cm, and the structure can bear fermentation liquor to rise to form stable fluid;

the waterfall flow plate 31 and the guide plate 3 are connected into an integral structure, the waterfall flow plate 31 extends out of the position 10-20cm above the liquid level in the fermentation tank 1, the waterfall flow plate 31 is an arc-shaped screen plate with the periphery open, the aperture of the waterfall flow plate 31 is between 0.5 cm and 2cm, so that fermentation liquid is conveniently buffered, the fermentation liquid is dispersed, and the ammonia in the fermentation tank is fully dispersed and separated;

the waterfall plate 31 and the guide plate 3 are not contacted with the stirring paddle 41, the gas injection pipe 2 and the gas outlet ring pipe 21, so that the fermentation liquid can be conveniently guided and lifted, and the fermentation liquid is dispersed to be contacted with gas, so that ammonia gas in the stirred and lifted fermentation liquid is fully separated;

the fermentation tank 1 is further provided with a defoaming pipe 11, a gas-liquid separator 12 and a buffer tank 13, the outer end of the defoaming pipe 11 is communicated with an externally connected sterile air pipeline, the inner end of the defoaming pipe 11 is arranged at the top of the inner cavity of the fermentation tank 1, and the inner end of the defoaming pipe 11 is provided with a nozzle;

the gas outlet end of the gas-liquid separator 12 is connected with the gas inlet end of the buffer tank 13, the gas inlet end of the gas-liquid separator 12 is vertically and hermetically communicated with the top of the inner cavity of the fermentation tank 1, and the gas outlet end of the buffer tank 13 is communicated with the outside, so that the ammonia gas separated from the fermentation liquid is conveniently subjected to subsequent treatment, and is more easily discharged out of the fermentation tank 1.

In one embodiment of the utility model:

the embodiment of the utility model provides a fermentation tank capable of separating bubbles in fermentation liquor, which solves the technical problems that: 1. when the existing fermentation tank 1 is used for microbial fermentation, ammonia gas can be generated, the ammonia gas generated by the microorganisms is very tiny and similar to aerosol, the size of ammonia gas bubbles cannot be reached, so that the buoyancy of the ammonia gas bubbles is too small and the ammonia gas can be contained in fermentation broth, the ammonia gas is continuously generated by the microorganisms and is continuously dissolved in the fermentation broth, the pH value of the fermentation broth can be changed, and further the microorganisms in the fermentation broth can lose a proper living environment, so that the fermentation effect is poor or the fermentation fails; 2. the conventional method at present is to stir and fuse the ammonia gas in the fermentation tank 1, only the simple stirring effect is poor, often the fermentation liquor is only stirred at the bottom, the ammonia gas in the fermentation liquor can only fuse less parts during stirring, the stirring force above the fermentation liquor is insufficient, the ammonia gas concentration in the fermentation liquor is still continuously increased, the pH value is still continuously changed, and the microbial fermentation is influenced;

3. the conventional fermentation tank 1 can only stir and fuse ammonia bubbles, but very tiny ammonia is dissolved in the fermentation broth, so that the ammonia in the fermentation broth is still more stored and the pH value in the fermentation broth is affected because the ammonia is difficult to fuse through stirring and flowing in a conventional horizontal plane.

The technical problems solved by the utility model are as follows: the fermentation liquor is lifted and lowered to be mutually fused by stirring, and the ammonia is carried away from the fermentation liquor by fusing large-particle air with the ammonia in the fermentation liquor, and the fermentation liquor is continuously lifted and separated from the liquid level to expose the ammonia in the air, so that the ammonia is separated from the fermentation liquor.

The technical effects are realized as follows: 1. according to the utility model, the air filling pipe 2 is added, so that sterile air is injected to the bottom of the fermentation tank 1, and the air is uniformly dispersed and aerated in the fermentation liquid, so that air is continuously provided for microorganisms, ammonia is replaced by the air, and ammonia bubbles are separated from the fermentation liquid;

2. through the cooperation of the stirring paddles 41 and the spiral guide plates 3, the fermentation liquor is continuously stirred and can be turned up and down, the fermentation tank 1 is continuously stirred by the centrifugal force of the stirring paddles 41 to spread on the inner wall, the extrusion force of the fermentation liquor continuously rises along the guide plates 3, and the extrusion force returns to the center of the top of the fermentation tank 1 to be downwards supplemented at the blades of the stirring paddles 41 after rising, so that the fermentation liquor is continuously circulated, the stirring and rising are melted, fine ammonia bubbles in the fermentation liquor are mutually fused, and larger ammonia bubbles generate enough buoyancy to rise away from the fermentation liquor, so that the ammonia concentration in the fermentation liquor is prevented from being overlarge;

3. the waterfall flow plate 31 is arranged above the fermentation liquid level, the centrifugal force generated by stirring the fermentation liquid can rise along the guide plate 3, the fermentation liquid rising to the waterfall flow plate 31 can fall down after losing power, the waterfall flow plate 31 can be flushed out, the waterfall flow plate 32 can fall down, a water curtain is formed, the fermentation liquid can be fully dispersed, ammonia in the fermentation liquid can be fully dispersed, the ammonia is separated from the fermentation liquid, the purpose of reducing the ammonia concentration is achieved, the fermentation liquid at the bottom of the fermentation tank 1 can continuously rise along the guide plate 3 to flush the waterfall flow plate 31, the effect of continuously separating the ammonia in the fermentation liquid is achieved, and the pH value in the fermentation liquid is effectively controlled to be in a proper range.

The technical scheme in the embodiment of the utility model aims to solve the problems, and the overall thought is as follows:

in order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

When the fermentation tank is manufactured, firstly, a conventional fermentation tank 1 is manufactured, the fermentation tank 1 is a closed tank body, a stirring paddle 41 is vertically arranged in the fermentation tank 1, a stirring motor 4 is arranged outside the fermentation tank 1, the upper end of the stirring paddle 41 extends out of the fermentation tank 1 and is vertically connected to a driving shaft of the stirring motor 4, and the driving shaft of the stirring motor 4 is vertically arranged, so that the fermentation tank 1 with the stirring paddle 41 is of a conventional structure;

the fermentation tank 1 is further vertically provided with a defoaming pipe 11, the upper end of the defoaming pipe 11 extends out of the fermentation tank 1 to form an outer end, the end of the defoaming pipe 11 extending into the fermentation tank 1 is an inner end, the outer end of the defoaming pipe 11 is communicated with an externally connected sterile air pipeline, the inner end of the defoaming pipe 11 is arranged at the top of an inner cavity of the fermentation tank 1, and the inner end of the defoaming pipe 11 is provided with a nozzle so as to facilitate air flow to generate air flow, blow foam at the top of fermentation liquid and puncture the foam at the top of the fermentation liquid;

the top of the fermentation tank 1 is also required to be provided with a gas-liquid separator 12 and a buffer tank 13, the gas outlet end of the gas-liquid separator 12 is connected with the gas inlet end of the buffer tank 13, the gas inlet end of the gas-liquid separator 12 is vertically and hermetically communicated with the top of the inner cavity of the fermentation tank 1, the gas outlet end of the buffer tank 13 is communicated with the outside, and the gas outlet end of the gas-liquid separator 12 and the buffer tank 13 are connected with the fermentation tank 1 to form an exhaust passage so as to conveniently discharge and recycle ammonia gas and redundant air; the air outlet end of the buffer tank 13 can be connected with an ammonia absorption tower of tail gas, so that ammonia is absorbed, and the ammonia absorption tower is of a conventional structure and only needs to be installed and abutted;

an air injection pipe 2 is also arranged in the fermentation tank 1; the outer end of the gas injection pipe 2 extends out of the fermentation tank 1 and is connected with an externally connected sterile air pipeline, the inner end of the gas injection pipe 2 is connected with a circular gas outlet ring pipe 21, a plurality of aeration holes 22 are uniformly formed in the gas outlet ring pipe 21, and each aeration hole 22 is communicated with the gas injection pipe 2 through the gas outlet ring pipe 21; the air outlet ring pipe 21 is a pipeline which is formed by bending round pipes to form a whole into a circular ring shape, the air outlet ring pipe 21 and the air injection pipe 2 are of an integral structure, a plurality of aeration holes 22 are annularly arranged at the outer side of the bottom of the air outlet ring pipe 21, air bubbles can be automatically ejected upwards, the coverage range is wider, and a nozzle can be arranged on each aeration hole 22, so that the air outlet of the aeration holes 22 is more uniform, the diffusion range is wider, and ammonia in fermentation liquor is easily wrapped and taken away;

then manufacturing the guide plate 3 and attaching the guide plate to the inner wall of the fermentation tank 1 for stable installation, and directly welding the edge of the guide plate 3 to the inner wall of the fermentation tank 1; the baffle 3 is an arc plate, the baffle 3 continuously extends in a spiral shape and is attached to the inner wall of the fermentation tank 1, the lower end of the baffle 3 is arranged at the bottom of the fermentation tank 1, the upper end of the baffle 3 extends out above the liquid level in the fermentation tank 1, the upper end of the baffle 3 is provided with a waterfall plate 31, a plurality of diffusing holes 32 are uniformly formed in the waterfall plate 31, and the diffusing holes 32 penetrate through the upper surface and the lower surface of the waterfall plate 31; the cross section of the guide plate 3 is of a groove-shaped structure with two high ends and a low middle, and the transverse width d of the guide plate 3 is between 5 cm and 10 cm; the waterfall flow plate 31 and the guide plate 3 are connected into an integral structure, the waterfall flow plate 31 extends out of the position 10-20cm above the liquid level in the fermentation tank 1, the waterfall flow plate 31 is an arc-shaped screen plate with the periphery open, and the aperture of the waterfall flow plate 31 is between 0.5 cm and 2 cm; neither the waterfall plate 31 nor the baffle 3 is in contact with the stirring paddle 41, the gas injection pipe 2, and the gas outlet ring pipe 21.

When the utility model is used, ammonia bubbles are continuously generated through the fermentation liquid, and the ammonia bubbles are small, large and large, so that the ammonia bubbles can automatically rise to the top of the fermentation tank to form foam in the fermentation liquid due to buoyancy; the small ammonia bubbles can be dissolved in the fermentation liquid and can not rise, the stirring motor 4 is started, the stirring paddle 41 rotates to stir the fermentation liquid to the side wall of the fermentation tank 1 to generate centrifugal force, in the stirring process of the fermentation liquid, the ammonia bubbles are continuously fused and become larger bubbles to rise to float out of the liquid level, the fermentation liquid is continuously stirred and pressed towards the fermentation tank 1, the fermentation liquid continuously rises along the spiral groove of the guide plate 3 and continuously rises, the stirring paddle 41 pushes the fermentation liquid at the blades to the side wall of the fermentation tank body, the fermentation liquid above the stirring paddle 41 downwards flows to be supplemented into the stirring paddle 41, so that the fermentation liquid continuously forms a circular flow, the fermentation liquid is continuously lifted to be fused more thoroughly, meanwhile, the fermentation liquid continuously rises to the waterfall plate 31 along the guide plate 3, and because some of inertia can be washed out of the waterfall plate 31 to form a water fall shape, and at the moment, the fermentation liquid can be fully contacted with the gas in the fermentation tank 1, the liquid level is completely separated from the ammonia gas in the fermentation tank, and the ammonia gas can be separated from the inside more easily;

meanwhile, sterile air is continuously injected into the air injection pipe 2, the air in the air injection pipe 2 flows along the air outlet ring pipe 21 and is dispersed and injected into fermentation liquor at the bottom of the fermentation tank 1 through the air aeration holes 22, the air bubbles are larger and continuously rise, the dispersed air bubbles contact with the fermentation liquor, and meanwhile, ammonia is wrapped to be separated from the liquid level when oxygen is provided for microorganisms, so that foam is formed on the fermentation liquid level, the foam is eliminated through the air in the defoaming pipe 11, the foam is liquid wrapped outside tiny air, the foam is pierced through air flow, ammonia and the air are completely broken, the air is not limited by the liquid any more, the air is separated along the air-liquid separator 12, the liquid is collected, the air enters the buffer tank 13 and is recovered through the ammonia recovery device, so that the ammonia in the fermentation tank 1 is effectively separated, the pH value in the fermentation liquor is kept balanced and stable, and the pH value change is prevented from exceeding the fermentation environment requirement.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.

Claims (4)

1. A fermenter capable of releasing bubbles in a fermentation broth, comprising: a fermentation tank (1), an air injection pipe (2) and a guide plate (3);

the fermentation tank (1) is a closed tank body, a stirring paddle (41) is vertically arranged inside the fermentation tank (1), a stirring motor (4) is arranged outside the fermentation tank (1), the upper end of the stirring paddle (41) extends out of the fermentation tank (1) and is vertically connected to a driving shaft of the stirring motor (4), and the driving shaft of the stirring motor (4) is vertically arranged;

the outer end of the gas injection pipe (2) extends out of the fermentation tank (1) and is connected with an externally connected sterile air pipeline, the inner end of the gas injection pipe (2) is connected with a circular gas outlet ring pipe (21), a plurality of aeration holes (22) are uniformly formed in the gas outlet ring pipe (21), and each aeration hole (22) is communicated with the gas injection pipe (2) through the gas outlet ring pipe (21);

the utility model discloses a fermentation tank, including baffle (3), baffle (3) are the arc, the baffle (3) become spiral form and extend in succession and lean on the inner wall of fermentation tank (1), the lower extreme of baffle (3) sets up the bottom at fermentation tank (1), the upper end of baffle (3) stretches out above the inside liquid level of fermentation tank (1), the upper end of baffle (3) has set up waterfall flow board (31), a plurality of scattered flow holes (32) have evenly been seted up on waterfall flow board (31), the upper and lower two sides that the waterfall flow board (31) are penetrated to scattered flow hole (32).

2. A fermenter capable of releasing bubbles in a fermentation broth according to claim 1, wherein: the fermentation device is characterized in that the air outlet ring pipe (21) is horizontally and stably arranged at the bottom of the inner cavity of the fermentation tank (1), the air outlet ring pipe (21) is a pipeline which is formed by bending round pipes into a circular shape as a whole, the air outlet ring pipe (21) and the air injection pipe (2) are of an integral structure, and a plurality of aeration holes (22) are annularly arranged at the outer side of the bottom of the air outlet ring pipe (21).

3. A fermenter capable of releasing bubbles in a fermentation broth according to claim 1, wherein: the cross section of the guide plate (3) is of a groove-shaped structure with two high ends and a low middle, and the transverse width d of the guide plate (3) is between 5 cm and 10 cm;

the waterfall flow plate (31) is connected with the guide plate (3) into an integral structure, the waterfall flow plate (31) extends out of the position 10-20cm above the liquid level in the fermentation tank (1), the waterfall flow plate (31) is an arc-shaped screen plate with the periphery open, and the aperture of the waterfall flow plate (31) is between 0.5 cm and 2 cm;

neither the waterfall plate (31) nor the guide plate (3) is in contact with the stirring paddle (41), the gas injection pipe (2) and the gas outlet ring pipe (21).

4. A fermenter capable of releasing bubbles in a fermentation broth according to claim 1, wherein: the fermentation tank (1) is further provided with a defoaming pipe (11), a gas-liquid separator (12) and a buffer tank (13), the outer end of the defoaming pipe (11) is communicated with an externally connected sterile air pipeline, the inner end of the defoaming pipe (11) is arranged at the top of the inner cavity of the fermentation tank (1), and the inner end of the defoaming pipe (11) is provided with a nozzle;

the gas outlet end of the gas-liquid separator (12) is connected with the gas inlet end of the buffer tank (13), the gas inlet end of the gas-liquid separator (12) is communicated with the top of the inner cavity of the fermentation tank (1) in a sealing way, and the gas outlet end of the buffer tank (13) is communicated with the outside.