Microbial fermentation device for producing phenethyl alcohol

Abstract

The utility model discloses a microbial fermentation device for producing phenethyl alcohol, which comprises a base, a support and a fermentation tank, the support and the fermentation tank are sequentially arranged on the base, a partition plate is arranged inside the fermentation tank, and the partition plate divides the inside of the fermentation tank into a fermentation area located on the upper layer and a liquid storage area located on the lower layer. A through hole for communicating the fermentation area with the liquid storage area is formed in the surface of the partition plate, a butterfly valve assembly is arranged in the through hole, a stirring assembly is arranged in the fermentation area, a dredging assembly is arranged at the bottom end of the stirring assembly, and a feeding pipe, an air inlet pipe and an air outlet pipe which are communicated with the fermentation area are arranged on the tank wall of the fermentation tank; a discharge pipe communicated with the liquid storage area is arranged at the bottom end of the fermentation tank, and a concentration sensor is arranged in the fermentation area. The device has the characteristics of reasonable structural design, high reaction efficiency, quick response, good quality of produced products, strong practicability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fermentation equipment, in particular to a microbial fermentation device for producing phenylethanol. Background Art

[0002] Engineered bacteria are new microorganisms processed using modern bioengineering technology. They are multifunctional, highly efficient and highly adaptable. When developing engineered bacteria, they need to be placed in fermentation equipment for fermentation. The equipment contains yeast fermentation medium in solid form, which provides nutritional conditions and suitable physical and chemical properties for fermentation. However, since general fermentation equipment is prone to blockage and does not have the function of automatic unblocking, it will affect work efficiency.

[0003] Therefore, a fermentation device for solving the above problems is provided in the prior art:

[0004] Application No. 202123216516.4 discloses a fermentation device for α-arbutin biosynthesis engineering bacteria based on Pichia pastoris, which includes a base, a bracket fixedly connected to the top of the base, a fermentation tank fixedly connected to the top of the bracket, a motor is provided inside the fermentation tank, the output shaft of the motor extends to the inside of the fermentation tank and is fixedly connected to a stirring rod, and the bottom of the stirring rod is fixedly connected to an anti-blocking component, and the stirring rod is driven by the motor to rotate, thereby driving the anti-blocking component to rotate, and using the cooperation between the block and the limit block, the dredging rod can be repeatedly moved, thereby dredging the discharge pipe. However, when using the fermentation device to produce phenylethanol for cigarettes, the concentration of phenylethanol in the fermentation tank cannot be known in real time, and when the concentration of phenylethanol in the fermentation tank reaches a certain threshold, it is also difficult to collect the reaction solution separately in time, which makes it easy to make the concentration of phenylethanol in the fermentation tank too high and inhibit Pichia pastoris from continuing to produce phenylethanol, and also leads to the production of other by-products that have a negative impact on the aroma of cigarettes. Utility Model Content

[0005] In view of this, the utility model provides a microbial fermentation device for producing phenylethanol, which can solve the technical problems that the prior art cannot monitor the phenylethanol concentration in the fermentation tank in real time and cannot collect the reaction liquid separately in time when the phenylethanol concentration in the fermentation tank reaches a certain threshold.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] A microbial fermentation device for producing phenylethanol comprises a base, a support and a fermentation tank sequentially arranged thereon, a partition plate is arranged inside the fermentation tank, the partition plate divides the inside of the fermentation tank into a fermentation area located at an upper layer and a liquid storage area located at a lower layer, a through hole connecting the fermentation area and the liquid storage area is opened on the surface of the partition plate, a butterfly valve assembly is arranged inside the through hole, the butterfly valve assembly comprises a butterfly valve for blocking the through hole, a filter screen located on the upper side of the butterfly valve and a signal receiver for controlling the opening and closing of the butterfly valve, a stirring device is arranged inside the fermentation area A mixing assembly, the mixing assembly includes a mixing shaft and a plurality of mixing blades evenly arranged on the surface thereof, a dredging assembly is arranged at the bottom end of the mixing assembly, the dredging assembly includes a sleeve movably connected to the bottom end of the mixing shaft through a spring, a dredging rod arranged at the bottom end of the sleeve, a blocking rod arranged on the outer wall of the sleeve and a limit block located on the inner wall of the fermentation tank, the tank wall of the fermentation tank is provided with a feed pipe, an air inlet pipe and an air outlet pipe connected with the fermentation area, the bottom end of the fermentation tank is provided with a discharge pipe connected with the liquid storage area, and the fermentation area is provided with a concentration sensor.

[0008] As an improvement of the above technical solution, the filter screen can completely cover the butterfly valve, the signal receiver is electrically connected to the butterfly valve, and the signal receiver is externally connected to a power source.

[0009] As an improvement of the above technical solution, the top end of the stirring shaft passes through the upper wall of the fermentation tank and is connected to a motor, the motor is located above the fermentation tank, and the stirring blades are circumferentially arranged on the surface of the stirring shaft.

[0010] As an improvement of the above technical solution, the inner wall of the sleeve is symmetrically provided with a limit groove, and the outer wall of the bottom end of the stirring shaft is symmetrically provided with a limit plate slidably connected to the limit groove. The sleeve can move up and down relative to the bottom end of the stirring shaft with the cooperation of the limit groove and the limit plate. The bottom end of the stirring shaft is provided with a connecting groove, and the spring is located inside the connecting groove. One end of the spring is fixedly connected to the top surface of the connecting groove, and the other end of the spring is fixedly connected to the inner bottom surface of the sleeve. The dredging rod is located directly above the through hole, and the baffle rod is symmetrically arranged on the outer wall of the sleeve. The limit block is inclined at a certain angle to the inner wall of the fermentation tank, and the center point of the limit block is at the same horizontal height as the baffle rod.

[0011] As an improvement of the above technical solution, the feed pipe is located at the top of the fermentation tank, the air intake pipe includes an air intake head end and an air intake tail end, the air intake tail end of the air intake pipe is located inside the fermentation tank and extends to the bottom of the fermentation area, and the air intake tail end of the air intake pipe is provided with a reinforcement ring fixedly connected to the inner wall of the fermentation tank.

[0012] As an improvement of the above technical solution, the air inlet pipe is externally connected to a positive pressure fan, and the air outlet pipe is externally connected to a negative pressure fan.

[0013] As an improvement of the above technical solution, the discharge pipe is provided with a switch valve.

[0014] As an improvement of the above technical solution, the concentration sensor is a phenylethanol concentration sensor, the concentration sensor is located on the inner wall of the fermentation tank in the fermentation area, and the concentration sensor is electrically connected to the signal receiver.

[0015] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0016] The utility model has the characteristics of reasonable structural design, high reaction efficiency, rapid response, good output product quality, strong practicality, etc. The utility model enables the concentration sensor to detect the concentration of phenylethanol in the environment in real time in the fermentation area of ​​the fermenter through the coordinated arrangement of the concentration sensor and the butterfly valve assembly, and converts the signal detected that the phenylethanol concentration reaches a preset threshold value into an electrical signal and sends it to the signal receiver, so that the signal receiver controls the opening and closing of the butterfly valve, thereby achieving the purpose of timely collecting the reaction liquid separately and avoiding the occurrence of excessive reaction to produce other by-products;

[0017] Other beneficial effects of the present invention will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a partial enlarged view of point A of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the stirring assembly of the utility model;

[0022] Figure 4 It is a schematic diagram of the top view of the butterfly valve assembly of the utility model;

[0023] Among them: 1. base; 2. bracket; 3. fermentation tank; 301. fermentation area; 302. liquid storage area; 4. butterfly valve assembly; 401. butterfly valve; 402. signal receiver; 403. filter; 5. stirring assembly; 501. motor; 502. stirring shaft; 503. stirring blade; 6. dredging assembly; 601. sleeve; 602. limit groove; 603. limit plate; 604. connecting groove; 605. spring; 606. stop rod; 607. dredging rod; 608. limit block; 7. feed pipe; 8. air inlet pipe; 801. reinforcement ring; 9. air outlet pipe; 10. discharge pipe; 11. concentration sensor; 12. partition plate; 121. through hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "above", "below", "front", "back", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figures 1 to 4 As shown, the utility model provides a microbial fermentation device for producing phenylethanol.

[0028] It includes a base 1 and a bracket 2 and a fermentation tank 3 arranged thereon in sequence, wherein a partition plate 12 is arranged inside the fermentation tank 3, and the partition plate 12 divides the interior of the fermentation tank 3 into a fermentation area 301 located at the upper layer and a liquid storage area 302 located at the lower layer, and a through hole 121 is opened on the surface of the partition plate 12 to connect the fermentation area 301 and the liquid storage area 302, and a butterfly valve assembly 4 is arranged inside the through hole 121, and the butterfly valve assembly 4 includes a butterfly valve 401 for blocking the through hole 121, a filter screen 403 located on the upper side of the butterfly valve 401, and a signal receiver 402 for controlling the opening and closing of the butterfly valve 401, and a stirring assembly 5 is arranged inside the fermentation area 301, and the stirring assembly 5 comprises a stirring shaft 502 and a plurality of stirring blades 503 evenly arranged on the surface thereof, a dredging assembly 6 is arranged at the bottom end of the stirring assembly 5, and the dredging assembly 6 comprises a sleeve 601 movably connected to the bottom end of the stirring shaft 502 through a spring 605, a dredging rod 607 arranged at the bottom end of the sleeve 601, a blocking rod 606 arranged on the outer wall of the sleeve 601, and a limit block 608 located on the inner wall of the fermentation tank 3, the tank wall of the fermentation tank 3 is provided with a feed pipe 7, an air inlet pipe 8 and an air outlet pipe 9 connected with the fermentation area 301, the bottom end of the fermentation tank 3 is provided with a discharge pipe 10 connected with the liquid storage area 302, and the fermentation area 301 is provided with a concentration sensor 11;

[0029] In the embodiment described in the utility model, the butterfly valve 401 has the function of cutting off or connecting the fermentation area 301 and the liquid storage area 302, the filter screen 403 has the function of filtering residues, and the filter screen 403 can completely cover the butterfly valve 401, so that when the butterfly valve 401 is opened, the bottom material in the fermentation tank 3 will not fall from the fermentation area 301 through the butterfly valve 401 into the liquid storage area 302, thereby avoiding the waste of the bottom material. The signal receiver 402 is electrically connected to the butterfly valve 401. When the signal receiver 402 controls the butterfly valve 401 to open, the reaction liquid in the fermentation area 301 enters the liquid storage area 302 through the filter screen 403. When the signal receiver 402 controls the butterfly valve 401 to close, the passage between the fermentation area 301 and the liquid storage area 302 is cut off, and the liquid in the fermentation area 301 no longer flows into the liquid storage area 302. The signal receiver 402 is externally connected to a power supply, and the power supply provides power support for the signal receiver 402.

[0030] In the embodiment described in the utility model, the stirring component 5 has the function of mixing and stirring the materials in the fermentation area 301. The top end of the stirring shaft 502 penetrates the upper end wall of the fermentation tank 3 and is connected to the motor 501. The motor 501 is located above the fermentation tank 3. The stirring blades 503 are circumferentially arranged on the surface of the stirring shaft 502. The motor 501 is powered on to drive the stirring shaft 502 connected to its output end to rotate, thereby driving the stirring blades 503 to rotate and stir the materials in the fermentation area 301, thereby accelerating the reaction rate of the materials in the fermentation area 301 and improving the production efficiency.

[0031] In the embodiment described in the present utility model, the dredging component 6 has the function of dredging the through hole 121 to prevent the filter screen 403 from being blocked. The inner wall surface of the sleeve 601 is symmetrically provided with a limit groove 602, and the outer wall surface of the bottom end of the stirring shaft 502 is symmetrically provided with a limit plate 603 slidably connected to the limit groove 602. The limit groove 602 can limit the rotation of the limit plate 603 relative to the limit groove 602, so that the sleeve 601 can only move up and down relative to the bottom end of the stirring shaft 502 under the cooperation of the limit groove 602 and the limit plate 603. The bottom end of the stirring shaft 502 is provided with a connecting groove 604, and a spring 605 is located inside the connecting groove 604. One end of the spring 605 is fixedly connected to the top surface of the connecting groove 604, and the other end of the spring 605 is fixedly connected to the inner bottom end surface of the sleeve 601. The dredging rod 607 is located directly above the through hole 121, and the blocking rod 606 is The stop block 608 is arranged on the outer wall surface of the sleeve 601 at a certain angle, and the center point of the stop block 608 is at the same horizontal height as the stop rod 606. When the stirring shaft 502 rotates and drives the dredging component 6 to rotate in the same direction, the stop rod 606 can contact the surface of the stop block 608 and move along the inclined direction of the stop block 608, thereby driving the sleeve 601 to slide relative to the bottom end of the stirring shaft 502. At this time, the spring 605 is compressed or stretched. When the stop rod 606 rotates to a state where it no longer contacts the stop block 608, the rebound effect of the spring 605 can make the dredging rod 607 rotate in and out of the through hole 121 driven by the sleeve 601 to achieve the purpose of dredging the bottom material above the filter screen 403 in the through hole 121, thereby avoiding the blockage of the through hole 121 and the filter screen 403.

[0032] Specifically, the limit block 608 is arranged upward at a certain angle. When the stirring shaft 502 drives the dredging component 6 to move, the following two dredging steps can be performed:

[0033] Unblocking step 1:

[0034] Before the stirring shaft 502 rotates, the initial state of the dredging rod 607 is outside the through hole 121. The motor 501 is energized to drive the stirring shaft 502 to reverse, and the stirring shaft 502 reverses to drive the sleeve 601 to rotate in the same direction, so that the sleeve 601 also drives the blocking rod 606 to reverse. As the blocking rod 606 continues to rotate, the end of the blocking rod 606 away from the sleeve 601 contacts the lower surface of the limit block 608 and moves downward along the inclined direction of the limit block 608, thereby causing the sleeve 601 to slide downward relative to the bottom end of the stirring shaft 502 and drive the dredging rod 606 to reverse. The through rod 607 moves downward to the inside of the through hole 121, and at this time, the spring 605 in the connecting groove 604 is stretched. When the blocking rod 606 continues to rotate until it is no longer in contact with the lower surface of the limit block 608, the sleeve 601 slides upward relative to the bottom end of the stirring shaft 502 due to the rebound of the spring 605, and the dredging rod 607 moves upward to the outside of the through hole 121, thereby completing a dredging work, so as to achieve the purpose of continuous dredging during the process of accelerating the reaction of the materials in the stirring fermentation tank 3, and avoid the situation that the bottom material accumulates on the surface of the filter screen 403 for a long time and the dredging is difficult;

[0035] Unblocking step 2:

[0036] Before the stirring shaft 502 rotates, the initial state of the dredging rod 607 is inside the through hole 121. The motor 501 is powered on to drive the stirring shaft 502 to rotate forward. The forward rotation of the stirring shaft 502 drives the sleeve 601 to rotate in the same direction, so that the sleeve 601 also drives the blocking rod 606 to rotate forward. As the blocking rod 606 continues to rotate, the end of the blocking rod 606 away from the sleeve 601 contacts the upper surface of the limit block 608 and moves upward along the inclined direction of the limit block 608, thereby causing the sleeve 601 to slide upward relative to the bottom end of the stirring shaft 502 and drive The dredging rod 607 moves upward to the outside of the through hole 121, at which time the spring 605 in the connecting groove 604 is compressed. When the blocking rod 606 continues to rotate until it is no longer in contact with the upper surface of the stop block 608, the sleeve 601 slides downward relative to the bottom end of the stirring shaft 502 due to the rebound of the spring 605, and the dredging rod 607 extends into the through hole 121 again to complete a dredging operation. Compared with the continuous stretching action of the spring 605 in the dredging step 1, the continuous compression of the spring 605 in the dredging step 2 can ensure that the spring 605 has a longer service life.

[0037] In the embodiment described in the utility model, the feed pipe 7 is located at the top of the fermentation tank 3, and the material is added into the fermentation area 301 of the fermentation tank 3 through the feed pipe 7. The air intake pipe 8 includes an air intake head end and an air intake tail end. The air intake tail end of the air intake pipe 8 is located inside the fermentation tank 3 and extends to the bottom of the fermentation area 301, so that the outside air can fully contact and react with the material in the fermentation area 301, thereby improving the production efficiency and product quality. The air intake tail end of the air intake pipe 8 is provided with a reinforcement ring 801 fixedly connected to the inner wall surface of the fermentation tank 3, and the reinforcement ring 801 can tighten the air intake tail end of the air intake pipe 8, thereby improving the air intake stability of the air intake pipe 8;

[0038] In the embodiment described in the utility model, the air inlet pipe 8 is externally connected to a positive pressure fan, which has the function of accelerating the entry of external air into the fermentation tank 3 to react with the material, and the air outlet pipe 9 is externally connected to a negative pressure fan, which has the function of accelerating the rate of exhaust gas generated by the reaction in the fermentation tank 3;

[0039] In the embodiment of the utility model, the discharge pipe 10 is provided with a switch valve, which can control the outflow of the reaction liquid stored in the liquid storage area 302, so as to facilitate the use of the reaction liquid;

[0040] In the embodiment described in the utility model, the concentration sensor 11 is a phenylethanol concentration sensor, which can detect the concentration of phenylethanol in the environment in real time, and send a signal to the next component when reaching a preset detection threshold. The concentration sensor 11 is located on the inner wall of the fermentation tank 3 in the fermentation area 301. The concentration sensor 11 is electrically connected to the signal receiver 402. The concentration sensor 11 can convert the signal detected that the phenylethanol concentration reaches a preset threshold into an electrical signal and send it to the signal receiver 402, so that the signal receiver 402 controls the opening and closing of the butterfly valve 401, so as to achieve the purpose of timely collecting the reaction liquid separately and avoid the occurrence of excessive reaction to produce other by-products.

[0041] In combination with the above content, the working steps of the utility model are:

[0042] First, the base material is added into the fermentation area 301 of the fermentation tank 3 through the feed pipe 7, and then the material is added into the fermentation area 301 through the feed pipe 7, and the material contacts the base material at the bottom of the fermentation area 301. Then, the outside air is introduced into the fermentation area 301 of the fermentation tank 3 through the air intake pipe 8, and the motor 501 is energized to drive the stirring shaft 502 to rotate, so that the stirring blades 503 on the surface of the stirring shaft 502 rotate in the fermentation area 301 and stir the material, so as to accelerate the reaction rate of the material in the fermentation area 301. At the same time, the rotation of the stirring shaft 502 drives the limiting piece 603 to rotate. Since the limiting groove 602 has the function of limiting the rotation of the limiting piece 603 relative to the limiting groove 602, the rotation of the stirring shaft 502 drives the sleeve 601 to rotate in the same direction, so that the sleeve 601 also drives the blocking rod 606 to rotate. As the blocking rod 606 continues to rotate, the end of the blocking rod 606 away from the sleeve 601 contacts the surface of the limiting block 608 and moves along the inclined direction of the limiting block 608, thereby causing the blocking rod 606 to rotate. The sleeve 601 is driven to slide upward or downward relative to the bottom end of the stirring shaft 502. At this time, the spring 605 is compressed or stretched. When the blocking rod 606 rotates to a state where it no longer contacts the limit block 608, the rebound effect of the spring 605 can make the dredging rod 607 rotate in and out of the through hole 121 driven by the sleeve 601, and so on, so as to achieve the purpose of continuous dredging in the process of accelerating the reaction of the materials in the stirring fermentation tank 3, thereby avoiding the situation where the bottom material accumulates on the surface of the filter screen 403 for a long time and becomes difficult to dredge. When the concentration of phenylethanol in the fermentation area 301 reaches a threshold value preset by the concentration sensor 11, the concentration sensor 11 converts the signal of detecting that the concentration of phenylethanol reaches a certain threshold value into an electrical signal and sends it to the signal receiver 402, so that the signal receiver 402 controls the butterfly valve 401 to open, and the reaction liquid in the fermentation area 301 enters the liquid storage area 302 through the through hole 121, the filter screen 403 and the butterfly valve 401, and the bottom material is retained in the fermentation area 301 by the filter screen 403 for reuse.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A microbial fermentation device for producing phenylethanol, characterized in that: It includes a base and a bracket and a fermentation tank sequentially arranged thereon, wherein a partition plate is arranged inside the fermentation tank, and the partition plate divides the interior of the fermentation tank into a fermentation area located at an upper layer and a liquid storage area located at a lower layer, and a through hole connecting the fermentation area and the liquid storage area is opened on the surface of the partition plate, and a butterfly valve assembly is arranged inside the through hole, and the butterfly valve assembly includes a butterfly valve for blocking the through hole, a filter screen located on the upper side of the butterfly valve, and a signal receiver for controlling the opening and closing of the butterfly valve. A stirring assembly is arranged inside the fermentation area, and the stirring assembly includes a stirring shaft and a plurality of stirring blades uniformly arranged on its surface, and a dredging assembly is arranged at the bottom end of the stirring assembly, and the dredging assembly includes a sleeve movably connected to the bottom end of the stirring shaft through a spring, a dredging rod arranged at the bottom end of the sleeve, a baffle arranged on the outer wall of the sleeve, and a limit block located on the inner wall of the fermentation tank, and the tank wall of the fermentation tank is provided with a feed pipe, an air inlet pipe and an air outlet pipe connected with the fermentation area, and the bottom end of the fermentation tank is provided with a discharge pipe connected with the liquid storage area, and the fermentation area is provided with a concentration sensor.

2. A microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The filter screen can completely cover the butterfly valve, the signal receiver is electrically connected to the butterfly valve, and the signal receiver is externally connected to a power source.

3. A microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The top end of the stirring shaft penetrates the upper end wall of the fermentation tank and is connected to a motor, the motor is located above the fermentation tank, and the stirring blades are circumferentially arranged on the surface of the stirring shaft.

4. A microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The inner wall of the sleeve is symmetrically provided with a limit groove, and the outer wall of the bottom end of the stirring shaft is symmetrically provided with a limit plate slidably connected to the limit groove. The sleeve can move up and down relative to the bottom end of the stirring shaft with the cooperation of the limit groove and the limit plate. The bottom end of the stirring shaft is provided with a connecting groove, and a spring is located inside the connecting groove. One end of the spring is fixedly connected to the top surface of the connecting groove, and the other end of the spring is fixedly connected to the inner bottom surface of the sleeve. The dredging rod is located directly above the through hole, and the baffle rod is symmetrically arranged on the outer wall of the sleeve. The limit block is inclined at a certain angle to the inner wall of the fermentation tank, and the center point of the limit block is at the same horizontal height as the baffle rod.

5. A microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The feed pipe is located at the top of the fermenter, and the air intake pipe includes an air intake head end and an air intake tail end. The air intake tail end of the air intake pipe is located inside the fermenter and extends to the bottom of the fermentation area. The air intake tail end of the air intake pipe is provided with a reinforcement ring fixedly connected to the inner wall of the fermenter.

6. A microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The air inlet pipe is externally connected to a positive pressure fan, and the air outlet pipe is externally connected to a negative pressure fan.

7. A microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The discharge pipe is provided with a switch valve.

8. The microbial fermentation device for producing phenylethanol according to claim 1, characterized in that: The concentration sensor is a phenylethanol concentration sensor, which is located on the inner wall of the fermentation tank in the fermentation area, and is electrically connected to a signal receiver.

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