Saccharification machine for microbial fermentation

Abstract

The invention discloses a saccharifying machine for microbial fermentation, comprising a fermentation tank, a stirring rod and an air outlet arranged on the fermentation tank, an air supply device is arranged at the bottom of the fermentation tank, a multi-layer partition is arranged in the fermentation tank, the partition comprises a first fan-shaped plate and a second fan-shaped plate, the larger arc edge of the first fan-shaped plate is fixed on the inner wall of the fermentation tank and the smaller arc edge is fitted with the stirring rod, the smaller arc edge of the second fan-shaped plate is fixed on the stirring rod and the larger arc edge is fitted with the inner wall of the fermentation tank, the first fan-shaped plate and the second fan-shaped plate are provided with air holes, the first fan-shaped plate is placed below the second fan-shaped plate and the two are fitted with each other, and the total length of the larger arc edge of the first fan-shaped plate and the second fan-shaped plate is greater than or equal to the inner wall perimeter of the fermentation tank. The multi-layer partition is arranged, the partition has an obstructive effect on the gas flow speed, and the air supply device can greatly increase the dissolved oxygen content in the fermentation tank when inputting the same volume of oxygen, increase the fermentation time of the microorganisms, and improve the saccharification effect.

Description

Technical Field

[0001] The invention relates to the field of microbial fermentation tanks, and more particularly to a saccharifying machine for microbial fermentation. Background Art

[0002] Saccharification refers to the process of decomposing starch into sweet products by adding water. It is the main process in the manufacturing process of starch sugar products and the main process of many intermediate products in the food fermentation process. When the existing saccharification and fermentation equipment uses microbial fermentation, it is necessary to pass oxygen into the equipment. The existing saccharification machine includes a fermentation tank with an air supply device inside. However, with the existing equipment, oxygen enters through the bottom. Under the action of stirring, the oxygen is removed quickly, the dissolved oxygen rate is not high, the microbial fermentation time is long, and the saccharification effect is not good. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a saccharifying machine for microbial fermentation.

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

[0005] A saccharifying machine for microbial fermentation comprises a fermentation tank, a stirring rod coaxially arranged with the fermentation tank, and an air outlet arranged on the fermentation tank, a gas supply device is arranged at the bottom of the fermentation tank, a multi-layer partition is arranged in the fermentation tank, the partition comprises a first fan-shaped plate and a second fan-shaped plate, the larger arc edge of the first fan-shaped plate is fixed on the inner wall of the fermentation tank and the smaller arc edge is in contact with the stirring rod, the smaller arc edge of the second fan-shaped plate is fixed on the stirring rod and the larger arc edge is in contact with the inner wall of the fermentation tank, the first fan-shaped plate and the second fan-shaped plate are provided with air holes, the first fan-shaped plate is placed below the second fan-shaped plate and the two are in contact with each other, and the total length of the larger arc edge of the first fan-shaped plate and the second fan-shaped plate is greater than or equal to the inner wall perimeter of the fermentation tank. This scheme improves the structure of the existing fermentation tank, that is, a multi-layer partition is arranged, the partition has an obstructive effect on the gas flow rate, and the gas supply device can greatly increase the dissolved oxygen content in the fermentation tank when inputting the same volume of oxygen, increase the fermentation time of the microorganisms, and improve the saccharification effect. Air holes are arranged on the partition. When the air supply device delivers oxygen, the pressure between the bottom partition and the bottom of the fermentation tank increases, and the oxygen and fermented liquid are discharged along the air holes to the area between the upper partition and the bottom partition. Since there is a certain pressure difference between the areas on both sides of the bottom partition, the flow of liquid can stir the liquid in the fermentation tank and improve the uniformity of the liquid.

[0006] Preferably, in order to facilitate the discharge of liquid and the cleaning of the fermentation tank, the height of the larger arc edge of the first sector plate and the second sector plate is higher than the height of the smaller arc edge.

[0007] Furthermore, the angle between the first sector plate and the stirring rod is greater than 40 and less than 80 degrees. When the first sector plate and the stirring rod are arranged vertically, the material on the first sector plate is not easy to be cleaned off during cleaning, and it needs to be arranged in a downwardly inclined structure to facilitate the discharge of the cleaning material.

[0008] Furthermore, the included angle between the first sector plate and the stirring rod is 60 degrees.

[0009] Preferably, in order to further improve the uniformity of the liquid, a stirring blade is fixed on the stirring rod, the stirring blade is placed between two adjacent layers of partitions and the stirring blade is not parallel to the first fan-shaped plate. The second fan-shaped plate is fixed on the stirring rod, and when the stirring rod is controlled to rotate, the liquid can be stirred. However, due to its low frequency, the stirring effect is not good. A stirring blade is added to the stirring rod to improve the stirring efficiency.

[0010] 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, the air supply pipe is provided with a one-way valve, and the air distribution plate is provided with an exhaust hole. 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.

[0011] Preferably, in order to effectively increase the dissolved oxygen content of the fermentation liquid, the diameter of the air holes is greater than 0.5 mm and less than 1 mm. The partition has an obstructive effect on the gas flow rate. The larger the diameter of the air holes, the poorer the barrier effect. Under the same air delivery rate, the dissolved oxygen content cannot be significantly increased; on the contrary, the smaller the diameter, the poorer the fluidity of the liquid. Setting the diameter within the above range can ensure both the dissolved oxygen content and the fluidity of the liquid.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] 1. The present invention is provided with multi-layer partitions, which hinder the gas flow rate. When the air supply device inputs the same volume of oxygen, it can greatly increase the dissolved oxygen content in the fermentation tank, increase the fermentation time of microorganisms, and improve the saccharification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of Example 2.

[0017] Figure 3 Schematic diagram of the structure of the partition. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1

[0020] like Figure 1 , 3 The saccharifying machine for microbial fermentation shown includes a fermentation tank 1, a stirring rod 2 coaxially arranged with the fermentation tank 1, and an air outlet 11 arranged on the fermentation tank 1. Similar to the existing structure, the fermentation tank is also provided with a feed inlet 12 and a discharge port, and an air supply device is provided at the bottom of the fermentation tank 1. A multi-layer partition is arranged in the fermentation tank 1, and the partition includes a first fan-shaped plate 31 and a second fan-shaped plate 32. The larger arc edge of the first fan-shaped plate 31 is fixed on the inner wall of the fermentation tank 1 and the smaller arc edge is in contact with the stirring rod 2. The smaller arc edge of the second fan-shaped plate 32 is fixed on the stirring rod 2 and the larger arc edge is in contact with the inner wall of the fermentation tank 1. The second fan-shaped plate 32 can be driven to rotate by the rotation of the stirring rod. The first fan-shaped plate 31 is placed below the second fan-shaped plate 32 and the two are in contact with each other. The total length of the larger arc edge lengths of the first fan-shaped plate 31 and the second fan-shaped plate 32 is greater than or equal to the circumference of the inner wall of the fermentation tank 1. When the stirring rod drives the second fan-shaped plate to rotate, the second fan-shaped plate rotates in contact with the first fan-shaped plate, and the second fan-shaped plate gradually joins with the first fan-shaped plate to form a circle to achieve blocking of the cross section of the fermentation tank; the first fan-shaped plate 31 and the second fan-shaped plate 32 are provided with air holes 33 to facilitate the circulation of air and liquid. The partition is provided with air holes. When the air supply device is delivering oxygen, the pressure between the bottom partition and the bottom of the fermentation tank increases, and oxygen and fermented liquid are discharged along the air holes to the area between the upper partition and the bottom partition; under the action of pressure difference and buoyancy, oxygen is discharged through the partition in sequence. The stirring rod 2 rotates under the drive of the driving device 5. The driving device can be realized by a motor and rotates only when the air supply device is not working. When the air supply device is working, the second fan-shaped plate and the first fan-shaped plate are kept in a state of being spliced ​​into a circle to increase the dissolved oxygen content under a certain air supply amount. The diameter of the air hole 33 is greater than 0.5mm and less than 1mm. When making highland barley, the diameter of the air hole 33 is preferably 0.8 to 1mm. The diameter of the air hole is set to different sizes according to different fermented products.

[0021] Example 2

[0022] This embodiment optimizes the first sector plate 31 and the second sector plate 32 based on the structure of the above embodiment. Figure 2As shown, the first sector plate 31 and the second sector plate 32 are both arranged perpendicular to the stirring rod. However, this structure is not convenient for cleaning the fermentation tank 1.

[0023] You can also use Figure 2 In the structure shown, the height of the larger arc edge of the first fan-shaped plate 31 and the second fan-shaped plate 32 is higher than the height of the smaller arc edge, that is, there is a certain angle between the first fan-shaped plate 31 and the horizontal plane. Preferably, the angle between the first fan-shaped plate 31 and the stirring rod 2 is greater than 40 and less than 80 degrees. The angle between the first fan-shaped plate 31 and the stirring rod 2 is 60 degrees. Preferably, the length of the larger arc edge of the first fan-shaped plate 31 is greater than half of the circumference of the inner wall of the fermentation tank 1, and the midlines of the two adjacent first fan-shaped plates 31 are respectively located on both sides of the stirring rod.

[0024] Example 3

[0025] This embodiment is optimized on the basis of the structure of the above embodiment, that is, the stirring blade 21 can also be fixed on the stirring rod 2, the stirring blade 21 is placed between two adjacent layers of partitions, and the stirring blade 21 is not parallel to the first fan-shaped plate 31.

[0026] The air supply device includes 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. The air supply pipe 41 is provided with a one-way valve 44, and the air distribution plate 43 is provided with an exhaust hole.

[0027] 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 saccharifying machine for microbial fermentation, comprising a fermentation tank (1), a stirring rod (2) coaxially arranged with the fermentation tank (1), and an air outlet (11) arranged on the fermentation tank (1), wherein an air supply device is arranged at the bottom of the fermentation tank (1), characterized in that: The fermentation tank (1) is provided with a multi-layer partition, the partition comprising a first fan-shaped plate (31) and a second fan-shaped plate (32), the larger arc edge of the first fan-shaped plate (31) is fixed on the inner wall of the fermentation tank (1) and the smaller arc edge is in contact with the stirring rod (2), the smaller arc edge of the second fan-shaped plate (32) is fixed on the stirring rod (2) and the larger arc edge is in contact with the inner wall of the fermentation tank (1), the first fan-shaped plate (31) and the second fan-shaped plate (32) are provided with air holes (33), the first fan-shaped plate (31) is placed below the second fan-shaped plate (32) and the two are in contact with each other, and the total length of the larger arc edges of the first fan-shaped plate (31) and the second fan-shaped plate (32) is greater than or equal to the circumference of the inner wall of the fermentation tank (1); The diameter of the vent hole (33) is greater than 0.5 mm and less than 1 mm; The stirring rod (2) is driven by a driving device (5) to rotate. The driving device can be implemented by a motor and rotates only when the air supply device is not working. When the air supply device is working, the second sector plate and the first sector plate are kept in a state of being spliced ​​into a circle, so as to increase the dissolved oxygen content under a certain air supply volume.

2. The saccharifying machine for microbial fermentation according to claim 1, characterized in that: The heights of the larger arc sides of the first sector plate (31) and the second sector plate (32) are higher than the heights of the smaller arc sides.

3. The saccharifying machine for microbial fermentation according to claim 2, characterized in that: The included angle between the first sector plate (31) and the stirring rod (2) is greater than 40 degrees and less than 80 degrees.

4. The saccharifying machine for microbial fermentation according to claim 2, characterized in that: The included angle between the first sector plate (31) and the stirring rod (2) is 60 degrees.

5. The saccharifying machine for microbial fermentation according to claim 1, characterized in that: A stirring blade (21) is fixed on the stirring rod (2), and the stirring blade (21) is placed between two adjacent layers of partition plates, and the stirring blade (21) is not parallel to the first sector plate (31).

6. The saccharifying machine for microbial fermentation 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).

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