Yeast propagation tank with stirring structure

Abstract

The utility model discloses a yeast expanding culture tank with a stirring structure, and mainly relates to the technical field of yeast expanding culture tanks. Comprising a stirring shaft rotationally arranged on a tank body, a feeding port and a discharging port are formed in the top and the bottom of the tank body respectively, the stirring shaft is provided with a plurality of groups of stirring paddles, each stirring paddle comprises a sliding sleeve arranged on the stirring shaft and stirring blades symmetrically arranged on the two sides of the sliding sleeve, the stirring blades are obliquely arranged on the sliding sleeves, and a plurality of holes are formed in the stirring blades. The device has the beneficial effects that the problem of non-uniform distribution of yeast in the expanding culture tank in the process of expanding culture of the yeast is solved, the uniform growth of the yeast is promoted, and the efficiency of expanding culture of the yeast is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of yeast propagation tanks, specifically a yeast propagation tank with a stirring structure. Background Technology

[0002] Alcohol is one of the beverages in human life. my country has a very long history of alcohol and there are many kinds of alcohol. Among them, beer requires yeast to ferment the brewing raw materials during brewing. In order to obtain enough yeast, it is necessary to expand the yeast.

[0003] Currently, yeast propagation systems generally include multiple propagation tanks. When propagating yeast, the yeast is first placed in one propagation tank for cultivation. After cultivation is complete, some of the yeast cells are taken out and placed in a second propagation tank for cultivation. After the yeast cells in the second propagation tank have completed cultivation, a portion of them are taken out and placed in a third propagation tank for cultivation. This process allows the yeast cells to gradually increase according to demand, achieving propagation. After all propagation is complete, the product is discharged.

[0004] However, as the propagation process progresses, the yeast will continue to multiply and increase. At the same time, the yeast will gradually settle at the bottom of the tank under the influence of gravity, resulting in uneven distribution of yeast in the tank. This prevents the yeast from fully contacting nutrients and oxygen, which slows down the uniform growth of the yeast to some extent. Utility Model Content

[0005] The purpose of this invention is to provide a yeast propagation tank with a stirring structure, which solves the problem of uneven yeast distribution in the propagation tank during the yeast propagation process, promotes uniform yeast growth, and improves the efficiency of yeast propagation.

[0006] To achieve the above objectives, the utility model employs the following technical solution:

[0007] A yeast propagation tank with a stirring structure includes a stirring shaft rotatably mounted on the tank body. The top and bottom of the tank body are respectively provided with a feed inlet and a discharge outlet. The stirring shaft is provided with several sets of stirring blades. Each stirring blade includes a sliding sleeve mounted on the stirring shaft and stirring blades symmetrically arranged on both sides of the sliding sleeve. The stirring blades are inclinedly mounted on the sliding sleeve and have several holes.

[0008] Furthermore, the sliding sleeve is slidably mounted on the stirring shaft, the stirring shaft is provided with a plurality of first through holes, the sliding sleeve is provided with a second through hole, and a fixing rod is also included that passes through the first through hole and the second through hole in sequence.

[0009] Furthermore, one end of the fixing rod is provided with a protrusion that contacts the sliding sleeve, and the other end of the fixing rod is symmetrically provided with a limiting block that contacts the sliding sleeve.

[0010] Furthermore, each of the limiting blocks has an inclined surface that contacts the sliding sleeve on both sides, a return spring is provided between the two limiting blocks, a set screw is threaded onto the fixing rod, and the end of the set screw has a conical surface that contacts the limiting block.

[0011] Furthermore, it also includes a fixed sleeve installed on the stirring shaft, the fixed sleeve having a plurality of feeding pipes, the upper side of the feeding pipes having an inlet, and the lower side of the feeding pipes having a plurality of outlets.

[0012] Furthermore, it also includes a first annular pipe fixedly installed on the tank body, and a second annular pipe rotatably installed outside the first annular pipe. The first annular pipe is provided with a feed pipe extending to the outside of the tank body, and the second annular pipe is provided with a connecting pipe communicating with the inlet.

[0013] Furthermore, a sealed bearing is provided between the first annular tube and the second annular tube.

[0014] Furthermore, it also includes a drive motor mounted on the tank body, the movable end of which is connected to the stirring shaft.

[0015] Furthermore, the stirring blade is provided with reinforcing ribs.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. When yeast needs to be expanded, the yeast inoculum is added to the expansion tank through the feed inlet. The yeast inoculum absorbs the nutrients in the expansion tank, causing it to multiply and increase in number. During the expansion process, the stirring shaft rotates on the tank, causing several sets of stirring blades on the stirring shaft to rotate around the shaft. This allows the stirring blades, symmetrically arranged on both sides of the sliding sleeve, to contact the material. Due to the inclined arrangement of the stirring blades, the blades apply both axial and tangential forces to the material simultaneously. The axial force pushes the material up and down, creating turbulence in multiple areas. This allows the material in different locations to continuously exchange and collide with each other, ensuring that the yeast inoculum can evenly contact the nutrients, providing a consistent nutritional environment for yeast growth, promoting rapid reproduction and growth, and improving the efficiency and quality of yeast expansion. The tangential force causes the material to rotate like a vortex, enhancing the uniformity of the mixing, which will further promote the rapid reproduction and growth of yeast, improving the efficiency and quality of yeast expansion.

[0018] 2. During the stirring process, the materials will continuously flow, accelerating the transfer of nutrients from high-concentration areas to low-concentration areas, improving the efficiency of nutrient transfer. At the same time, the metabolic products produced by yeast during growth will be promptly diffused into the surrounding materials, preventing the accumulation of metabolic products around yeast cells and inhibiting their growth, thus further improving the efficiency and quality of yeast propagation. In addition, the stirring process also promotes heat transfer and exchange, avoiding localized excessively high or low temperatures, resulting in a more uniform temperature distribution within the tank. This helps yeast grow under suitable temperature conditions, further improving the efficiency and quality of yeast propagation.

[0019] 3. The holes on the stirring blades can reduce the resistance encountered by the stirring blades, making the stirring blades rotate more smoothly and reducing energy loss; at the same time, the holes allow materials to pass through, increasing the mutual penetration and collision between materials, ensuring that the yeast strain can be evenly contacted with nutrients, providing a consistent nutritional environment for yeast growth, promoting the rapid reproduction and growth of yeast, and improving the efficiency and quality of yeast propagation. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of the internal structure of the tank body of this utility model.

[0021] Appendix Figure 2 This is a schematic diagram of the structure of the stirring shaft of this utility model.

[0022] Appendix Figure 3 This is a schematic diagram of the structure of the stirring blade of this utility model.

[0023] Appendix Figure 4 This is a structural schematic diagram of the fixing rod of this utility model.

[0024] Appendix Figure 5 This is an appendix to the utility model Figure 4 A magnified view of part A in the middle.

[0025] The labels shown in the attached diagram:

[0026] 1. Tank body; 2. Agitator shaft; 3. Inlet; 4. Outlet; 5. Agitator paddle; 6. Sliding sleeve; 7. Agitator blade; 8. Hole; 9. First through hole; 10. Second through hole; 11. Fixing rod; 12. Protrusion; 13. Limiting block; 14. Inclined surface; 15. Return spring; 16. Set screw; 17. Conical surface; 18. Fixing sleeve; 19. Feeding pipe; 20. Inlet; 21. Outlet; 22. First annular pipe; 23. Second annular pipe; 24. Feeding pipe; 25. Connecting pipe; 26. Sealed bearing; 27. Drive motor; 28. Reinforcing rib. Detailed Implementation

[0027] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0028] A yeast propagation tank with a stirring structure, such as Figure 1 , Figure 2 and Figure 3 As shown, the system includes a stirring shaft 2 rotatably mounted on a tank 1. The tank 1 has an inlet 3 at its top and an outlet 4 at its bottom for adding yeast inoculum and discharging yeast after propagation. The stirring shaft 2 has several sets of stirring paddles 5. These paddles 5 create turbulence in the materials across multiple propagation zones, allowing materials at different locations to continuously exchange and collide, ensuring the yeast inoculum receives nutrients evenly. This provides a consistent nutritional environment for yeast growth, promoting rapid reproduction and growth, and improving the efficiency and quality of yeast propagation. Each stirring paddle 5 includes a sliding sleeve 6 mounted on the stirring shaft 2 and stirring blades 7 symmetrically arranged on both sides of the sliding sleeve 6. The stirring blades 7 are inclined on the sliding sleeve 6. By driving the stirring shaft 2 to rotate on the tank 1, the stirring paddles 5 on the stirring shaft 2 rotate around the stirring shaft 2, causing the stirring blades 7 symmetrically arranged on both sides of the sliding sleeve 6 to contact the materials. Due to the inclined arrangement of the stirring blades 7, they simultaneously apply axial and tangential forces to the materials. The axial force pushes the materials up and down, forming... The turbulent flow allows materials at different locations to constantly exchange and collide, ensuring that the yeast cells can evenly contact nutrients, providing a consistent nutritional environment for yeast growth, promoting rapid reproduction and growth, and improving the efficiency and quality of yeast propagation. The tangential force causes the materials to rotate like a vortex, enhancing the uniformity of mixing, which will further promote rapid yeast reproduction and growth, improving the efficiency and quality of yeast propagation. Furthermore, the continuous flow of materials during mixing accelerates the transfer of nutrients from high-concentration areas to low-concentration areas, improving nutrient transfer efficiency. Simultaneously, it promptly diffuses the metabolic products produced by the yeast during growth into the surrounding materials, preventing the accumulation of metabolic products around yeast cells and inhibiting their growth, further improving the efficiency and quality of yeast propagation. In addition, the mixing process also promotes heat transfer and exchange, preventing localized overheating or underheating, resulting in a more uniform temperature distribution within the tank, which helps yeast grow under suitable temperature conditions, further improving the efficiency and quality of yeast propagation.

[0029] The stirring blade 7 has several holes 8, which reduces the resistance encountered by the stirring blade 7, makes the stirring blade 7 rotate more smoothly, and reduces energy loss. At the same time, the holes 8 allow materials to pass through, increase the mutual penetration and collision between materials, ensure that the yeast strain can be evenly contacted with nutrients, provide a consistent nutritional environment for yeast growth, promote the rapid reproduction and growth of yeast, and improve the efficiency and quality of yeast propagation.

[0030] Preferred, such as Figure 2 , Figure 3 and Figure 4 As shown, the sliding sleeve 6 is slidably mounted on the stirring shaft 2. The stirring shaft 2 has several first through holes 9, and the sliding sleeve 6 has a second through hole 10. It also includes a fixing rod 11 that passes through the first through hole 9 and the second through hole 10 in sequence. By sliding the sliding sleeve 6 on the stirring shaft, the positions of several sets of stirring paddles 5 on the stirring blades 7 can be changed. Simultaneously, the number of stirring paddles 5 can be increased or decreased as needed to meet the stirring requirements of different amounts of yeast, promoting rapid yeast reproduction and growth, and improving the efficiency and quality of yeast propagation. After adjusting the position of the stirring paddles 5, the fixing rod 11 passes through the first through hole 9 and the second through hole 10 on the stirring shaft 2 and the sliding sleeve 6 in sequence. The resistance generated by the fixing rod 11 in contact with the sliding sleeve 6 and the stirring shaft 2 restricts the sliding sleeve 6 from sliding on the stirring shaft 2, thereby fixing the stirring paddles 5 on the stirring shaft 2 and preventing the stirring paddles 5 from falling off the stirring shaft 2 during the stirring process, which would affect the yeast stirring effect.

[0031] Preferred, such as Figure 4 and Figure 5 As shown, one end of the fixing rod 11 is provided with a protrusion 12 that contacts the sliding sleeve 6, and the other end of the fixing rod 11 is provided with a limiting block 13 that contacts the sliding sleeve 6. After the fixing rod 11 passes through the stirring shaft 2 and the first through hole 9 and the second through hole 10 provided on the sliding sleeve 6 in sequence, it contacts the sliding sleeve 6 through the protrusion 12 and the limiting block 13 respectively, which restricts the movement of the fixing rod 11 relative to the sliding sleeve 6 and the stirring shaft 2, and prevents the fixing rod 11 from falling off the sliding sleeve 6 and the stirring shaft 2, thereby improving the overall stability of the stirring structure and further improving the efficiency and quality of yeast propagation.

[0032] Preferred, such as Figure 4 and Figure 5As shown, the limiting block 13 has inclined surfaces 14 on both sides that contact the sliding sleeve 6. A return spring 15 is provided between the two limiting blocks 13. A set screw 16 is threaded onto the fixing rod 11. The end of the set screw 16 has a conical surface 17 that contacts the limiting block 13. When the fixing rod 11 passes through the stirring shaft 2 and the first through hole 9 and the second through hole 10 provided on the sliding sleeve 6, it contacts the sliding sleeve 6 through the inclined surface 14 of the limiting block 13. The resulting force drives the two limiting blocks 13 to move inward, so that the fixing rod 11 passes smoothly through the first through hole 9 and the second through hole 10 until the protrusion 12 contacts one side of the sliding sleeve 6. At this time, the limiting block... 13 slides out from the second through hole 10, and under the action of the return spring 15, drives the two limiting blocks 13 to slide out from the fixed rod 11 until the inclined surface 14 on the limiting block 13 contacts the sliding sleeve 6. Then, rotate the set screw 16 at the end of the fixed rod 11 so that the conical surface 17 at the end of the set screw 16 contacts the limiting block 13, restricting the limiting block 13 from moving inward. The resistance generated after the limiting block 13 contacts the sliding sleeve 6 restricts the movement of the fixed rod 11 relative to the sliding sleeve 6 and the stirring shaft 2, preventing the fixed rod 11 from falling off the sliding sleeve 6 and the stirring shaft 2, improving the overall stability of the stirring structure, and further improving the efficiency and quality of yeast propagation.

[0033] Preferred, such as Figure 1 and Figure 2 As shown, it also includes a fixed sleeve 18 disposed on the stirring shaft 2. The fixed sleeve 18 is provided with several feeding pipes 19. The upper side of the feeding pipe 19 is provided with an inlet 20, and the lower side of the feeding pipe 19 is provided with several outlets 21. During the rotation of the stirring shaft 2, the fixed sleeve 18 disposed on the stirring shaft 2 will rotate together. At this time, the nutrients required for yeast propagation are discharged from the feeding pipes 19 through the inlet 20 and the multiple outlets 21 in sequence. As the feeding pipes 19 rotate around the stirring shaft 2, the nutrients enter all parts of the tank 1, which improves the nutrient transfer efficiency, ensures that the yeast strain can be evenly contacted with the nutrients, and thus promotes the rapid reproduction and growth of yeast, improving the efficiency and quality of yeast propagation.

[0034] Preferred, such as Figure 1 and Figure 2As shown, it also includes a first annular pipe 22 fixedly installed on the tank body 1 and a second annular pipe 23 rotatably installed outside the first annular pipe 22. The first annular pipe 22 is provided with a feed pipe 24 extending to the outside of the tank body 1, and the second annular pipe 23 is provided with a connecting pipe 25 connected to the inlet 20. The nutrients required for yeast propagation are fed into the first annular pipe 22 installed on the tank body 1 through the feed pipe 24 extending to the outside of the tank body 1. Under the action of gravity, the nutrients gradually enter from the first annular pipe 22 into the second annular pipe 23, and through the connecting pipe 25, enter the feeding pipe 19 through the inlet 20, and finally are discharged into various parts of the tank body 1 from several outlets 21, ensuring that the yeast strain can be evenly contacted with the nutrients, thereby promoting the rapid reproduction and growth of yeast and improving the efficiency and quality of yeast propagation. In addition, since the first annular pipe 22 and the second annular pipe 23 are rotatably connected, while ensuring normal transportation of nutrients, it avoids the pipelines transporting nutrients from getting tangled together, which would affect the normal transportation of nutrients.

[0035] Preferred, such as Figure 1 As shown, a sealed bearing 26 is provided between the first annular tube 22 and the second annular tube 23. The sealed bearing 26 reduces the friction between the first annular tube 22 and the second annular tube 23, thereby reducing the power required for the drive mechanism to rotate the stirring shaft 2.

[0036] Preferred, such as Figure 1 and Figure 2 As shown, it also includes a drive motor 27 mounted on the tank body 1. The movable end of the drive motor 27 is connected to the stirring shaft 2, providing a power source for the rotation of the stirring shaft 2.

[0037] Preferred, such as Figure 2 and Figure 3 As shown, the stirring blade 7 is provided with reinforcing ribs 28, which increases the stability of the overall structure of the stirring blade 7 and improves the mixing effect of materials.

[0038] Example 1

[0039] This invention provides a yeast propagation tank with a stirring structure, such as... Figure 1-3As shown, when yeast needs to be expanded, the yeast inoculum is put into the expansion tank through the feed inlet 3. The yeast inoculum absorbs the nutrients in the expansion tank, causing the yeast to multiply and increase. During the yeast expansion process, the stirring shaft 2 is driven to rotate on the tank body 1, causing several sets of stirring blades 5 on the stirring shaft 2 to rotate around the stirring shaft 2. This causes the stirring blades 7, which are symmetrically arranged on both sides of the sliding sleeve 6, to come into contact with the material. Because the stirring blades 7 are inclined, they apply axial and tangential forces to the material at the same time. The axial force will push the material up and down, causing multiple areas to form turbulence. This allows the material in different positions to continuously exchange and collide with each other, ensuring that the yeast inoculum can come into contact with nutrients evenly, providing a consistent nutritional environment for yeast growth, promoting the rapid reproduction and growth of yeast, and improving the efficiency and quality of yeast expansion. The tangential force causes the material to rotate like a vortex, enhancing the uniformity of mixing and further promoting the rapid reproduction and growth of yeast, thus improving the efficiency and quality of yeast propagation. Furthermore, the continuous flow of material during mixing accelerates the transfer of nutrients from high-concentration areas to low-concentration areas, improving nutrient transfer efficiency. Simultaneously, it promptly diffuses the metabolic products produced by yeast during growth into the surrounding material, preventing their accumulation around yeast cells and inhibiting their growth, further enhancing the efficiency and quality of yeast propagation. Additionally, the mixing process promotes heat transfer and exchange, preventing localized overheating or underheating, resulting in a more uniform temperature distribution within the tank. This helps yeast grow under suitable temperature conditions, further improving the efficiency and quality of yeast propagation.

[0040] The holes 8 on the stirring blade 7 can reduce the resistance encountered by the stirring blade 7, making the stirring blade 7 rotate more smoothly and reducing energy loss; at the same time, the holes 8 can allow materials to pass through, increase the mutual penetration and collision between materials, ensure that the yeast strain can be evenly contacted with nutrients, provide a consistent nutritional environment for yeast growth, promote the rapid reproduction and growth of yeast, and improve the efficiency and quality of yeast propagation.

[0041] Example 2

[0042] Based on Example 1, such as Figure 3 , Figure 4 and Figure 5As shown, before yeast propagation, the number of stirring paddles 5 needs to be increased or decreased according to the amount of yeast to be propagated, so as to meet the stirring needs of different amounts of yeast, promote the rapid reproduction and growth of yeast, and improve the efficiency and quality of yeast propagation. The process of installing stirring paddles 5 is as follows: the position of stirring paddles 5 is adjusted by sliding the sliding sleeve 6 on the stirring rod. Then, the fixing rod 11 is passed through the stirring shaft 2 and the first through hole 9 and the second through hole 10 provided on the sliding sleeve 6 in sequence. The inclined surface 14 of the limiting block 13 contacts the sliding sleeve 6, and the component force generated drives the two limiting blocks 13 to move inward, so that the fixing rod 11 passes smoothly through the first through hole 9 and the second through hole 10 until the protrusion 12 contacts one side of the sliding sleeve 6. At this time, the limiting block 13 slides out from the second through hole 10 and returns to the return spring 15. Under the action of elastic force, the two limiting blocks 13 are driven to slide out from the fixed rod 11 until the inclined surface 14 on the limiting block 13 contacts the sliding sleeve 6. Then, the set screw 16 at the end of the fixed rod 11 is rotated so that the conical surface 17 at the end of the set screw 16 contacts the limiting block 13, restricting the limiting block 13 from moving inward. The resistance generated after the limiting block 13 contacts the sliding sleeve 6 restricts the movement of the fixed rod 11 relative to the sliding sleeve 6 and the stirring shaft 2, preventing the fixed rod 11 from falling off the sliding sleeve 6 and the stirring shaft 2. At the same time, the resistance generated after the fixed rod 11 contacts the sliding sleeve 6 and the stirring shaft 2 restricts the sliding sleeve 6 from sliding on the stirring shaft 2, thereby fixing the stirring paddle 5 on the stirring shaft 2 and preventing the stirring paddle 5 from falling off the stirring shaft 2 during the stirring process, which would affect the stirring effect of the yeast.

[0043] Example 3

[0044] Based on Example 1, such as Figure 1 and Figure 2 As shown, during the yeast propagation process, the nutrients required for yeast propagation are fed into the first annular pipe 22 set on the tank 1 through the feed pipe 24 extending to the outside of the tank 1. Under the action of gravity, the nutrients gradually enter the second annular pipe 23 from the first annular pipe 22, and through the connecting pipe 25, enter the feeding pipe 19 through the inlet 20, and finally discharge into the tank 1 from several outlets 21. At this time, since the drive motor 27 drives the stirring shaft 2 to rotate, it will drive the fixed sleeve 18 set on the stirring shaft 2 to rotate together, so that the feeding pipe 19 rotates around the stirring shaft 2, thereby feeding the nutrients into all parts of the tank 1, improving the nutrient transfer efficiency, ensuring that the yeast strain can be evenly contacted with the nutrients, thereby promoting the rapid reproduction and growth of yeast, and improving the efficiency and quality of yeast propagation. In addition, since the first annular pipe 22 and the second annular pipe 23 are rotatably connected, while ensuring the normal transportation of nutrients, it avoids the pipelines transporting nutrients from getting tangled together, which would affect the normal transportation of nutrients.

Claims

1. A yeast propagation tank with a stirring structure, comprising a stirring shaft (2) rotatably mounted on the tank body (1), characterized in that: The tank (1) is provided with a feed inlet (3) and a discharge outlet (4) at the top and bottom respectively. The stirring shaft (2) is provided with several sets of stirring paddles (5). The stirring paddle (5) includes a sliding sleeve (6) provided on the stirring shaft (2) and stirring blades (7) symmetrically provided on both sides of the sliding sleeve (6). The stirring blades (7) are inclined on the sliding sleeve (6) and have several holes (8).

2. A yeast propagation tank with a stirring structure according to claim 1, characterized in that: The sliding sleeve (6) is slidably mounted on the stirring shaft (2). The stirring shaft (2) has several first through holes (9) and the sliding sleeve (6) has a second through hole (10). It also includes a fixing rod (11) that passes through the first through hole (9) and the second through hole (10) in sequence.

3. A yeast propagation tank with a stirring structure according to claim 2, characterized in that: One end of the fixing rod (11) is provided with a protrusion (12) that contacts the sliding sleeve (6), and the other end of the fixing rod (11) is provided with a limiting block (13) that contacts the sliding sleeve (6).

4. A yeast propagation tank with a stirring structure according to claim 3, characterized in that: The limiting block (13) has inclined surfaces (14) on both sides that contact the sliding sleeve (6), a return spring (15) is provided between the two limiting blocks (13), and a set screw (16) is threaded onto the fixing rod (11). The end of the set screw (16) has a conical surface (17) that contacts the limiting block (13).

5. A yeast propagation tank with a stirring structure according to claim 1, characterized in that: It also includes a fixed sleeve (18) set on the stirring shaft (2), the fixed sleeve (18) is provided with a plurality of feeding pipes (19), the upper side of the feeding pipes (19) is provided with an inlet (20), and the lower side of the feeding pipes (19) is provided with a plurality of outlets (21).

6. A yeast propagation tank with a stirring structure according to claim 5, characterized in that: It also includes a first annular pipe (22) fixedly installed on the tank body (1) and a second annular pipe (23) rotatably installed outside the first annular pipe (22). The first annular pipe (22) is provided with a feed pipe (24) extending to the outside of the tank body (1), and the second annular pipe (23) is provided with a connecting pipe (25) communicating with the inlet (20).

7. A yeast propagation tank with a stirring structure according to claim 6, characterized in that: A sealed bearing (26) is provided between the first annular tube (22) and the second annular tube (23).

8. A yeast propagation tank with a stirring structure according to claim 1, characterized in that: It also includes a drive motor (27) mounted on the tank (1), the movable end of which is connected to the stirring shaft (2).

9. A yeast propagation tank with a stirring structure according to claim 1, characterized in that: The stirring blade (7) is provided with reinforcing ribs (28).

Images