A microbial fermentation device with high oxygen dissolution capacity

Abstract

The present invention discloses a microbial fermentation device with high oxygen solubility, comprising a fermentation tank, a stirring rod coaxial with the fermentation tank, and an air outlet and a feed port both arranged on the fermentation tank, wherein an air supply device is arranged at the bottom of the fermentation tank, and a stirring blade is wound on the stirring rod, and the outer edge of the stirring blade is in contact with the inner wall of the fermentation tank. The stirring blade is wound on the stirring rod and the outer edge is in contact with the fermentation tank, a channel is formed between the stirring blade and the stirring rod, and the channel is several times the height of the fermentation tank, and the dissolved oxygen content of the liquid in the fermentation tank can be greatly increased due to the increase in the channel length and the increase in the contact time between the gas and the microorganism.

Description

Technical Field

[0001] The invention relates to the field of microbial fermentation tanks, and more particularly to a microbial fermentation device with high oxygen solubility. Background Art

[0002] Microbial fermentation refers to the process of using microorganisms to convert raw materials into products needed by humans through specific metabolic pathways under suitable conditions. Microbial fermentation is carried out in a fermentation tank. Existing microbial fermentation tanks use oxygen injection and stirring with a stirring rod to increase the reproduction rate of oxygen-consuming microorganisms. However, the oxygen content is not high if only the injection method is used. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a microbial fermentation device with high oxygen solubility.

[0004] The present invention is achieved through the following technical solutions:

[0005] A microbial fermentation device with high oxygen solubility includes a fermentation tank, a stirring rod coaxial with the fermentation tank, and an air outlet and a feed port both arranged on the fermentation tank, an air supply device is arranged at the bottom of the fermentation tank, a stirring blade is wound on the stirring rod, and the outer edge of the stirring blade is in contact with the inner wall of the fermentation tank. This scheme makes improvements on the basis of the existing fermentation device structure, specifically improves the existing stirring blade structure, the stirring blade is wound on the stirring rod and the outer edge is in contact with the fermentation tank, a channel is formed between the stirring blade and the stirring rod, and the channel is several times the height of the fermentation tank, oxygen enters the bottom of the fermentation tank through the air supply device, and the gas enters the channel formed by the stirring blade and the stirring rod through the bottom of the fermentation tank and is discharged. Since the channel length is increased, the contact time between the gas and the microorganism is increased, which can greatly increase the dissolved oxygen content of the liquid in the fermentation tank.

[0006] Preferably, the air supply device comprises an air supply pipe, a buffer chamber connected to the air supply pipe, and an air distribution plate arranged on the top surface of the buffer chamber, a one-way valve is arranged on the air supply pipe, and an exhaust hole is arranged on the air distribution plate. The air supply device is used to transport oxygen, and its structure is simple. It is placed in the fermentation tank. When the air supply device is not working, the liquid in the fermentation tank will flow into the air supply pipe along the exhaust hole. A one-way valve is arranged in the air supply pipe to prevent a large amount of liquid from flowing back.

[0007] Preferably, the stirring rod comprises a driving rod connected to the output end of the driving device and an outer cylinder sleeved on the driving rod through a thread, and the stirring blade is wound on the outer cylinder. The stirring rod adopts the structure of the driving rod and the outer cylinder. Since the stirring blade fits the fermentation tank, there is friction resistance between the stirring blade during the rotation process, which will hinder the rotation of the stirring blade. The driving rod drives the outer cylinder to rotate through the thread during the rotation process. Under the action of the stirring blade, the rotation speed of the outer cylinder lags behind the driving rod. At this time, the outer cylinder moves up and down relative to the driving rod, thereby driving the stirring blade to move up and down, further improving the uniformity of stirring and further increasing the dissolved oxygen content.

[0008] Furthermore, a rubber layer is provided on the inner wall of the fermentation tank, which increases the frictional resistance with the stirring blade and improves the reliability of the stirring blade moving up and down during the rotation process.

[0009] Furthermore, in order to avoid damage caused by excessive displacement of the stirring blade and affect its service life, an outer cylinder limiter is provided on the driving rod, the air uniforming plate is perpendicular to the driving rod, the highest end and the lowest end of the stirring blade are respectively located between the two ends of the outer cylinder, and the distance between the driving rod and the air uniforming plate is less than the length of the outer cylinder.

[0010] Furthermore, in order to improve the stability of the movement of the outer cylinder, the driving rod is fitted with the air homogenizing plate.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0012] 1. The stirring blade of the present invention is wound on the stirring rod and the outer edge is in contact with the fermentation tank. A channel is formed between the stirring blade and the stirring rod and the channel is several times the height of the fermentation tank. Since the channel length is increased, the contact time between the gas and the microorganism is increased, and the dissolved oxygen content of the liquid in the fermentation tank can be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention.

[0014] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0016] Example 1

[0017] like Figure 1A high oxygen solubility microbial fermentation device is shown, comprising a fermentation tank 1, a stirring rod coaxial with the fermentation tank 1, and an air outlet 11 and a feed port 12 both arranged on the fermentation tank 1. An air supply device is arranged at the bottom of the fermentation tank 1, and a stirring blade 3 is wound on the stirring rod. The outer edge of the stirring blade 3 is in contact with the inner wall of the fermentation tank 1 but there is no fixed relationship between the two. When the stirring rod drives the stirring blade to rotate, stirring can be achieved and a channel can be provided for gas flow.

[0018] Example 2

[0019] This embodiment optimizes the air supply device based on the structure of the above embodiment, that is, the air supply device includes an air supply pipe 41, a buffer chamber 42 connected to the air supply pipe 41 and an air uniforming plate 41 arranged on the top surface of the buffer chamber 42, the air supply pipe 41 is provided with a one-way valve 44, and the air uniforming plate 43 is provided with an exhaust hole.

[0020] Example 3

[0021] This embodiment optimizes the air supply device based on the structure of the above embodiment, that is, the stirring rod includes a driving rod 21 connected to the output end of the driving device 5 and an outer cylinder 22 threadedly sleeved on the driving rod 21, and the stirring blade 3 is wound on the outer cylinder 22. The driving device can be implemented by a motor to realize the control of the forward and reverse rotation of the driving rod.

[0022] The driving rod 21 is provided with an outer cylinder stopper 6, the air-distributing plate 43 is perpendicular to the driving rod 21, the highest end and the lowest end of the stirring blade 3 are respectively located between the two ends of the outer cylinder 22, and the distance between the driving rod 21 and the air-distributing plate 43 is less than the length of the outer cylinder 22. Preferably, the driving rod 21 is placed on the air-distributing plate 43 and fits the air-distributing plate 43.

[0023] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high oxygen solubility microbial fermentation device, comprising a fermentation tank (1), a stirring rod coaxial with the fermentation tank (1), and an air outlet (11) and a feed inlet (12) both arranged on the fermentation tank (1), wherein an air supply device is arranged at the bottom of the fermentation tank (1), characterized in that: A stirring blade (3) is wound around the stirring rod, and the outer edge of the stirring blade (3) is in contact with the inner wall of the fermentation tank (1); The stirring rod comprises a driving rod (21) connected to the output end of the driving device (5) and an outer cylinder (22) sleeved on the outside of the driving rod (21) through a thread, and the stirring blade (3) is wound on the outer cylinder (22).

2. A high oxygen-soluble microbial fermentation device according to claim 1, characterized in that: The air supply device comprises an air supply pipe (41), a buffer chamber (42) connected to the air supply pipe (41), and an air distribution plate (43) arranged on the top surface of the buffer chamber (42); a one-way valve (44) is arranged on the air supply pipe (41), and an exhaust hole is arranged on the air distribution plate (43).

3. A high oxygen-soluble microbial fermentation device according to claim 2, characterized in that: A rubber layer is provided on the inner wall of the fermentation tank (1).

4. A high oxygen-soluble microbial fermentation device according to claim 3, characterized in that: The driving rod (21) is provided with an outer cylinder stopper (6); the air-distributing plate (43) is perpendicular to the driving rod (21); the highest end and the lowest end of the stirring blade (3) are respectively located between the two ends of the outer cylinder (22); and the distance between the driving rod (21) and the air-distributing plate (43) is less than the length of the outer cylinder (22).

5. A high oxygen-soluble microbial fermentation device according to claim 4, characterized in that: The driving rod (21) is in contact with the air-distributing plate (43).

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