High-cleanliness stainless steel fermenter

Abstract

The application relates to the technical field of fermentation, in particular to a high-cleanliness stainless steel fermentation tank, which comprises a tank body, the upper end of the tank body is fixedly installed with a top cover, the upper surfaces of the two sides of the top cover are respectively fixedly embedded with a feeding inlet and an exhaust pipe, the lower surface of the tank body is provided with a liquid discharge port, the inner side of the exhaust pipe is slidably inserted with an embedded cylinder through an elastic mechanism, the lower end of the embedded cylinder is fixedly connected with a bevel ring, the upper surface edge of the bevel ring is fixedly connected with a moving cylinder, the moving cylinder is slidably sleeved at the lower end of the outer surface of the exhaust pipe, the bevel ring is located below the exhaust pipe, the outer surface of the embedded cylinder is fixedly connected with a plurality of inclined blocks arranged in an annular array, the inner surface of the exhaust pipe and the two side surfaces corresponding to each inclined block are respectively fixedly connected with fixed blocks, the tank can automatically rotate and clean the bucket-shaped filter membrane, the tank is prevented from being blocked and the gas pressure in the tank is stabilized, the tank does not need to be frequently disassembled and cleaned, and bacterial pollution is avoided.

Description

Technical Field

[0001] This invention relates to the field of fermentation technology, and in particular to a high-purity stainless steel fermenter. Background Technology

[0002] High-cleanliness stainless steel fermenters are core equipment in high-precision microbial culture systems. They are essential specialized equipment in high-precision fermentation and microbial culture fields such as biomedicine, high-end food fermentation, and fine biochemicals. They meet the requirements of sterile, highly clean, and closed fermentation production, effectively avoiding contamination by other microorganisms and material deterioration, and are compatible with the production standards of high-precision, high-purity microbial fermentation. During fermentation, the continuous metabolism of microorganisms produces a large amount of gas, causing the internal pressure to rise continuously. To maintain pressure balance and ensure a closed and clean fermentation environment, the exhaust ports of high-cleanliness stainless steel fermenters are equipped with filter cartridges. These filters remove fermentation broth droplets, microorganisms, and trace impurities carried in the exhaust gas. This prevents external microorganisms from entering the tank and also avoids material leakage with the exhaust gas, ensuring the cleanliness and stability of the overall fermentation process.

[0003] Currently, the exhaust filter elements of conventional stainless steel fermenters on the market all adopt a fixed installation structure, which cannot be dynamically adjusted. During long-term continuous closed fermentation, the fermentation liquid and humid steam splashing inside the tank easily adhere to and accumulate on the surface of the filter membrane, gradually clogging the micropores of the filter element. For high-cleanliness fermentation conditions, the harm of filter element blockage due to liquid accumulation is even more prominent. It not only causes poor exhaust from the tank and abnormally high pressure inside the tank, which reduces the purity and production efficiency of the fermentation products, but in severe cases, it can also cause tank depressurization failure, posing a safety hazard.

[0004] Currently, existing high-cleanliness fermentation tanks lack a dedicated online self-cleaning structure to address the problem of filter cartridge clogging. When the filter cartridge becomes clogged, the system must be shut down and the tank opened, requiring manual disassembly of the filter cartridge for cleaning, disinfection, or replacement. This necessitates interrupting the continuous fermentation process, severely impacting production efficiency. Furthermore, frequent filter cartridge disassembly can damage the sealing precision of the fermentation tank's exhaust port, easily leading to seal failure. Therefore, a high-cleanliness stainless steel fermentation tank is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a high-cleanliness stainless steel fermentation tank.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a high-cleanliness stainless steel fermentation tank, comprising a tank body, a top cover fixedly installed at the upper end of the tank body, an inlet and an exhaust pipe respectively fixedly embedded on both sides of the upper surface of the top cover, a drain outlet provided on the lower surface of the tank body, an inner sleeve slidably inserted into the inner side of the exhaust pipe via an elastic mechanism, a beveled ring fixedly connected to the lower end of the inner sleeve, a movable cylinder fixedly connected to the upper edge of the beveled ring, the movable cylinder being slidably sleeved at the lower end of the outer surface of the exhaust pipe, and the beveled ring being located at the drain outlet. Below the trachea, several inclined blocks arranged in a ring array are fixedly connected to the outer surface of the inner tube. Fixed blocks are fixedly connected to the inner surface of the exhaust pipe and to the two sides of each inclined block. A filter element is fixedly embedded in the inner side of the inner tube. A funnel-shaped filter membrane is fixedly installed in the inner side of the filter element through a support member. An agitator shaft is rotatably installed in the inner side of the top cover through a drive mechanism. A rotating rod is fixedly connected to the upper end of the outer surface of the agitator shaft. A contact cylinder is rotatably installed at one end of the rotating rod. An agitator mechanism is provided on the outer surface of the agitator shaft. The rotating rod rotates with the stirring shaft, and when the contact cylinder passes the lower end of the inclined ring, it pushes the inclined ring and the inner cylinder upward.

[0007] Preferably, the elastic mechanism includes a protruding ring fixedly disposed on the outer surface of the inner tube, the protruding ring being located at the upper end of the inclined block, the protruding ring being slidably engaged with the inner wall of the exhaust pipe, a limiting ring being fixedly disposed on the inner wall of the exhaust pipe, the inner wall of the limiting ring being slidably fitted with the upper end of the outer surface of the inner tube, a spring being sleeved on the outer surface of the inner tube, the spring being located between the protruding ring and the limiting ring, and an inclined surface being formed on the upper surface of the limiting ring.

[0008] Preferably, a connector is fixedly connected to the upper surface of the exhaust pipe, the connector is connected to the inner side of the exhaust pipe, and an outer pipe is fixedly embedded at the upper end of the connector.

[0009] Preferably, the number of the inclined blocks is set to four, and the fixed block has a pushing surface on one side surface near the inclined block, and the pushing surface slides in contact with the side surface of the inclined block.

[0010] Preferably, the agitation mechanism includes a plurality of agitation plates arranged in a ring array and fixedly connected to the outer surface of the agitation shaft. Agitation blades are fixedly installed at the ends of the agitation plates. The driving mechanism includes a drive motor fixedly installed in the middle of the upper surface of the top cover. The output shaft of the drive motor is fixedly connected to the upper end of the agitation shaft.

[0011] Preferably, a support grid is fixedly installed at the lower end of the filter element, and support meshes are fixedly embedded at the upper and lower ports of the inner side of the filter element. The support member includes a support frame fixedly installed on the inner wall of the filter element, and the support frame is fixedly embedded on the upper surface of the funnel-shaped filter membrane.

[0012] Preferably, a mounting ring is fixedly connected to the end of the rotating rod away from the contact cylinder, and the mounting ring is fixedly sleeved on the outer surface of the stirring shaft. A bent end is fixedly connected to the other end of the rotating rod, and a T-shaped shaft is rotatably connected to the outer surface of the bent end. One end of the T-shaped shaft is fixedly connected to the shaft end of the contact cylinder.

[0013] Preferably, an outer cover is fixedly fitted on the outer surface of the tank, and a spirally distributed heating tube is provided between the outer cover and the outer surface of the tank. The two ends of the heating tube pass through the outer surface of the outer cover and are fixedly connected to heating liquid ports. Several mounting seats are fixedly connected to the outer surface of the tank and near the top of the outer cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the stirring fermentation process, the contact cylinder periodically drives the inner cylinder to rotate and lift the funnel-shaped filter membrane spirally. By relying on centrifugal force, the liquid adhering to the surface of the filter membrane is removed, which can continuously clean the filter membrane and avoid the blockage of the funnel-shaped filter membrane by liquid accumulation, which would cause the exhaust to be blocked and the tank pressure to be too high. The pressure inside the tank is kept stable throughout the process, providing a constant fermentation environment for microorganisms. 2. The funnel-shaped filter membrane of this invention can be automatically cleaned, avoiding clogging problems. It eliminates the need for shutdown, disassembly, and cleaning and replacement of the exhaust filter element as required by traditional processes. It also avoids the problem of repeated disassembly and reassembly of the exhaust structure leading to sealing failure and the intrusion of external bacteria into the tank. This meets the high cleanliness and sterile production requirements of stainless steel fermenters and reduces the probability of fermentation material contamination and scrapping. 3. In this invention, the funnel-shaped filter membrane has a funnel-shaped sloping structure that is narrow at the top and wide at the bottom. Under the action of centrifugal force, the liquid attached to the lower surface will slide outward along the inclined funnel wall and will not accumulate and stagnate in the middle of the funnel-shaped filter membrane. Compared with the planar filter membrane, the sloping structure provides guidance for the liquid to flow outward, accelerating the droplets to detach from the filter membrane surface. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a high-cleanliness stainless steel fermentation tank according to the present invention; Figure 2 This is a cross-sectional view of a high-cleanliness stainless steel fermentation tank according to the present invention. Figure 3 This is a partial cross-sectional view of the top cover of a high-cleanliness stainless steel fermentation tank according to the present invention. Figure 4 This invention relates to a high-purity stainless steel fermentation tank. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a cross-sectional view of the movable cylinder of a high-cleanliness stainless steel fermentation tank according to the present invention. Figure 6 This is a schematic diagram of the exhaust pipe of a high-cleanliness stainless steel fermentation tank according to the present invention. Figure 7 This is a schematic diagram of the filter element of a high-purity stainless steel fermenter according to the present invention from the lower view. Figure 8 This is a schematic diagram of the funnel-shaped filter membrane of a high-purity stainless steel fermenter according to the present invention. Figure 9 This is a schematic diagram of the rotating rod of a high-purity stainless steel fermentation tank according to the present invention. Figure 10 This is a front sectional view of the top cover of a high-cleanliness stainless steel fermentation tank according to the present invention.

[0016] The components are as follows: 1. Tank body; 2. Top cover; 3. Inlet; 4. Exhaust pipe; 5. Connector; 6. Outer pipe; 7. Moving cylinder; 8. Inclined ring; 9. Inner cylinder; 10. Filter element; 11. Support mesh; 12. Limiting ring; 13. Inclined surface; 14. Spring; 15. Protruding ring; 16. Inclined block; 17. Fixed block; 18. Pushing surface; 19. Support grid; 20. Support frame; 21. Bucket-shaped filter membrane; 22. Contact cylinder; 23. Rotating rod; 24. Bent end; 25. T-shaped shaft; 26. Mounting ring; 27. Agitator shaft; 28. Agitator plate; 29. ​​Agitator blade; 30. Drive motor; 31. Drain port; 32. Outer casing; 33. Heating tube; 34. Heating liquid port; 35. Mounting base. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figures 1-10 The high-cleanliness stainless steel fermentation tank shown includes a tank body 1. A top cover 2 is fixedly installed on the upper end of the tank body 1. An inlet 3 and an exhaust pipe 4 are respectively fixedly embedded on both sides of the upper surface of the top cover 2. A drain outlet 31 is provided on the lower surface of the tank body 1. An inner sleeve 9 is slidably inserted into the inner side of the exhaust pipe 4 through an elastic mechanism. An inclined ring 8 is fixedly connected to the lower end of the inner sleeve 9. A movable cylinder 7 is fixedly connected to the upper edge of the inclined ring 8. The movable cylinder 7 is slidably sleeved at the lower end of the outer surface of the exhaust pipe 4. The inclined ring 8 is located below the exhaust pipe 4. The outer side of the inner sleeve 9... Several inclined blocks 16 arranged in a ring array are fixedly connected to the surface of the exhaust pipe 4. Fixed blocks 17 are fixedly connected to the inner surface of the exhaust pipe 4 and to the two sides of each inclined block 16 respectively. A filter element 10 is fixedly embedded in the inner side of the inner tube 9. A funnel-shaped filter membrane 21 is fixedly installed in the inner side of the filter element 10 through a support member. An agitator 27 is rotatably installed in the inner side of the top cover 2 through a drive mechanism. A rotating rod 23 is fixedly connected to the upper end of the outer surface of the agitator 27. A contact cylinder 22 is rotatably installed at one end of the rotating rod 23. An agitator mechanism is provided on the outer surface of the agitator 27. The rotating rod 23 rotates with the stirring shaft 27. When the contact cylinder 22 passes the lower end of the inclined ring 8, it pushes the inclined ring 8 and the inner cylinder 9 upward.

[0019] The elastic mechanism includes a protruding ring 15 fixedly mounted on the outer surface of the inner cylinder 9. The protruding ring 15 is located at the upper end of the inclined block 16 and slides against the inner wall of the exhaust pipe 4. A limit ring 12 is fixedly mounted on the inner wall of the exhaust pipe 4. The inner wall of the limit ring 12 slides against the upper end of the outer surface of the inner cylinder 9. A spring 14 is sleeved on the outer surface of the inner cylinder 9 and is located between the protruding ring 15 and the limit ring 12. An inclined surface 13 is formed on the upper surface of the limit ring 12 to prevent liquid accumulation on the surface. The limit ring 12 can restrict the smooth upward movement of the inner cylinder 9 and prevent the spring 14 from being damaged by excessive compression. The protruding ring 15 makes smooth contact with the inner wall of the exhaust pipe 4, maintains coaxiality during sliding, reduces friction loss, and achieves automatic reset by the force of the spring 14, thus improving the stability of the reciprocating motion of the mechanism.

[0020] A connector 5 is fixedly connected to the upper surface of the exhaust pipe 4. The connector 5 is connected to the inside of the exhaust pipe 4. An external pipe 6 is fixedly embedded at the upper end of the connector 5 to facilitate quick connection with external pipelines. The connector 5 can be integrally welded to the exhaust pipe 4 for tight bonding, and the joint is sealed with a weld to prevent gas leakage.

[0021] Four inclined blocks 16 are provided. A pushing surface 18 is provided on the side surface of the fixed block 17 near the inclined block 16. The pushing surface 18 slides and contacts the side surface of the inclined block 16. The four inclined blocks 16 are arranged in a uniform ring array, which ensures uniform force distribution and stable transmission, and can effectively distribute the axial compressive force. The pushing surface 18 is a smooth inclined slope that fits precisely with the inclined block 16. During operation, it can guide the inner cylinder 9 to rotate and move upward, avoiding structural jamming and wear.

[0022] The agitation mechanism includes several agitator plates 28 arranged in a ring array and fixedly connected to the outer surface of the agitator shaft 27. Agitator blades 29 are fixedly mounted at the ends of the agitator plates 28. The drive mechanism includes a drive motor 30 fixedly mounted in the middle of the upper surface of the top cover 2. The output shaft of the drive motor 30 is fixedly connected to the upper end of the agitator shaft 27. The drive motor 30 is centrally mounted, ensuring balanced force distribution and stable operation, providing stable power output to drive the agitator shaft 27 to rotate at a uniform speed. The transmission structure is simple and efficient, with low power loss, enabling continuous and uniform stirring of the internal fermentation broth.

[0023] A support grid 19 is fixedly installed at the lower end of the filter element 10, and support nets 11 are fixedly embedded at the upper and lower ports of the inner side of the filter element 10. The support components include a support frame 20 fixedly installed on the inner wall of the filter element 10, and the support frame 20 is fixedly embedded on the upper surface of the funnel-shaped filter membrane 21. The support grid 19 can support and protect the support net 11 at the bottom, preventing the support net 11 from being deformed by pressure. The upper and lower sets of support nets 11 can regulate the air inlet and outlet flow paths and prevent larger impurities from entering the inner side of the filter element 10. The support frame 20 has a shaping and reinforcing effect on the funnel-shaped filter membrane 21, ensuring the stability of the filter membrane structure and effectively improving the overall filtration accuracy and structural durability. The funnel-shaped filter membrane 21 has a conical pleated funnel structure with dense radial pleats evenly distributed on the surface. All pleats extend radially outward from the center to the outer edge. The pleats are evenly distributed to form a regular fan-shaped layer, which greatly expands the effective filtration area and does not obstruct the flow of liquid to the periphery when centrifugal force is generated during rotation.

[0024] A mounting ring 26 is fixedly connected to one end of the rotating rod 23 away from the contact cylinder 22. The mounting ring 26 is fixedly sleeved on the outer surface of the stirring shaft 27. The mounting ring 26 and the stirring shaft 27 rotate synchronously. A bent end 24 is fixedly connected to the other end of the rotating rod 23. A T-shaped shaft 25 is rotatably connected to the outer surface of the bent end 24. One end of the T-shaped shaft 25 is fixedly connected to the shaft end of the contact cylinder 22. The contact cylinder 22 rotates around the T-shaped shaft 25. When it contacts the inclined surface of the inclined ring 8, it can smoothly push the inclined ring 8.

[0025] An outer casing 32 is fixedly fitted onto the outer surface of the tank body 1. A spirally distributed heating pipe 33 is arranged between the outer casing 32 and the outer surface of the tank body 1. Both ends of the heating pipe 33 pass through the outer surface of the outer casing 32 and are fixedly connected to heating liquid inlets 34. Several mounting seats 35 are fixedly connected to the outer surface of the tank body 1, near the top of the outer casing 32. The spirally arranged heating pipe 33 can evenly cover the outer wall of the tank body 1, providing a larger heat exchange coverage area and ensuring uniform heating of the liquid inside the tank body 1. The heating liquid inlets 34 facilitate the circulation of the heat transfer medium. The mounting seats 35 are evenly distributed around the circumference of the tank body 1 and can be used for fixed installation on a frame, ensuring stable installation of the entire fermentation tank. The outer casing 32 also serves as a heat insulation and protective layer, reducing heat loss.

[0026] Liquid and microorganisms are fed into tank 1 through inlet 3; heating medium is introduced through lower heating inlet 34, and upper heating inlet 34 is connected to an external drain collection pipe. Heat is transferred through heating pipe 33 to achieve constant temperature control of the fermentation environment inside tank 1. At the same time, drive motor 30 drives stirring shaft 27 to rotate, and stirring plate 28 and stirring blade 29 synchronously stir the liquid in tank to ensure uniform mixing of fermentation materials.

[0027] As the agitator shaft 27 continues to rotate, when the contact cylinder 22 moves to the bottom of the inclined ring 8, it pushes the inclined ring 8, the inner cylinder 9, and the moving cylinder 7 upwards in sync. The protruding ring 15 moves upwards and compresses the spring 14. The inclined block 16 slides between the two fixed blocks 17, causing the inner cylinder 9 to move upwards in a spiral motion, which in turn drives the funnel-shaped filter membrane 21 inside the filter element 10 to rotate in a spiral motion. The centrifugal force generated by the rotation can throw the liquid attached to the surface of the filter membrane away from all sides, preventing the liquid from accumulating and clogging the funnel-shaped filter membrane 21 and reducing its air permeability.

[0028] After the contact cylinder 22 disengages from the bottom of the inclined ring 8, the compressed spring 14 releases its elastic force, pushing the protruding ring 15 and the inner cylinder 9 to reset downwards along a spiral trajectory; during the reset phase, the funnel-shaped filter membrane 21 once again relies on centrifugal force to complete the self-cleaning of the surface liquid. Therefore, with the continuous cyclical action of the fermentation stirring process, the funnel-shaped filter membrane 21 achieves continuous self-cleaning, avoiding liquid film accumulation that hinders air permeability and effectively preventing abnormal increases in the internal air pressure of the tank 1.

[0029] The funnel-shaped filter membrane 21 has a funnel-shaped sloping structure that is narrow at the top and wide at the bottom. Under the action of centrifugal force, the liquid attached to the lower surface will slide outward along the inclined funnel wall and will not accumulate and stagnate in the middle of the funnel-shaped filter membrane 21. Compared with the planar filter membrane, the sloping structure provides guidance for the liquid to flow outward, accelerating the droplets to detach from the filter membrane surface.

[0030] The movable cylinder 7 is fitted onto the lower end of the outer surface of the exhaust pipe 4, and the upper end of the outer surface of the inner cylinder 9 is in contact with the inner wall of the limiting ring 12, so that a reliable sealing structure is formed between the exhaust pipe 4 and the inner cylinder 9, which can effectively prevent gas and liquid in the tank from seeping into the gap between them, and at the same time prevent gas and liquid from leaking from the gap; after the gas and liquid in the tank 1 are filtered by the filter element 10, they are discharged to the outside through the connector 5 and the outer pipe 6, ensuring that the filtration is sufficient and reliable during exhaust.

[0031] A valve is installed at the end of the drain port 31; after the fermentation process is completed, the valve is opened and the fermentation liquid in the tank can be discharged out through the drain port 31.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A high-purity stainless steel fermentation tank, comprising a tank body (1), characterized in that: A top cover (2) is fixedly installed on the upper end of the tank (1). An inlet (3) and an exhaust pipe (4) are fixedly embedded on both sides of the upper surface of the top cover (2). A drain outlet (31) is provided on the lower surface of the tank (1). An inner sleeve (9) is slidably inserted into the inner side of the exhaust pipe (4) through an elastic mechanism. An inclined ring (8) is fixedly connected to the lower end of the inner sleeve (9). A movable cylinder (7) is fixedly connected to the edge of the upper surface of the inclined ring (8). The movable cylinder (7) is slidably sleeved at the lower end of the outer surface of the exhaust pipe (4). The inclined ring (8) is located below the exhaust pipe (4). An inner sleeve (9) is fixedly connected to the outer surface of the inner sleeve (9). A number of inclined blocks (16) are arranged in a ring array. The inner surface of the exhaust pipe (4) and the two sides of each inclined block (16) are fixedly connected to a fixing block (17). The inner side of the inner tube (9) is fixedly embedded with a filter element (10). The inner side of the filter element (10) is fixedly installed with a bucket-shaped filter membrane (21) by a support. The inner side of the top cover (2) is rotatably installed with a stirring shaft (27) by a driving mechanism. The upper end of the outer surface of the stirring shaft (27) is fixedly connected with a rotating rod (23). One end of the rotating rod (23) is rotatably installed with a contact cylinder (22). The outer surface of the stirring shaft (27) is provided with a stirring mechanism. The rotating rod (23) rotates with the stirring shaft (27), and when the contact cylinder (22) passes the lower end of the inclined ring (8), it pushes the inclined ring (8) and the inner cylinder (9) upward.

2. The high-cleanliness stainless steel fermentation tank according to claim 1, characterized in that: The elastic mechanism includes a protruding ring (15) fixedly disposed on the outer surface of the inner tube (9). The protruding ring (15) is located at the upper end of the inclined block (16). The protruding ring (15) slides with the inner wall of the exhaust pipe (4). A limit ring (12) is fixedly disposed on the inner wall of the exhaust pipe (4). The inner wall of the limit ring (12) slides against the upper end of the outer surface of the inner tube (9). A spring (14) is sleeved on the outer surface of the inner tube (9). The spring (14) is located between the protruding ring (15) and the limit ring (12). An inclined surface (13) is opened on the upper surface of the limit ring (12).

3. The high-cleanliness stainless steel fermentation tank according to claim 1, characterized in that: A connector (5) is fixedly connected to the upper surface of the exhaust pipe (4). The connector (5) is connected to the inner side of the exhaust pipe (4). An outer pipe (6) is fixedly embedded at the upper end of the connector (5).

4. The high-purity stainless steel fermentation tank according to claim 1, characterized in that: The number of the inclined blocks (16) is set to four. The fixed block (17) has a pushing surface (18) on one side surface near the inclined block (16). The pushing surface (18) slides against the side surface of the inclined block (16).

5. A high-purity stainless steel fermentation tank according to claim 1, characterized in that: The agitation mechanism includes several agitation plates (28) arranged in a ring array fixedly connected to the outer surface of the agitation shaft (27). Agitation blades (29) are fixedly installed at the ends of the agitation plates (28). The drive mechanism includes a drive motor (30) fixedly installed in the middle of the upper surface of the top cover (2). The output shaft of the drive motor (30) is fixedly connected to the upper end of the agitation shaft (27).

6. The high-purity stainless steel fermentation tank according to claim 1, characterized in that: The filter element (10) is fixedly installed with a support grid (19) at its lower end. The filter element (10) is fixedly embedded with a support mesh (11) at its upper and lower inner ports. The support includes a support frame (20) fixedly installed on the inner wall of the filter element (10). The support frame (20) is fixedly embedded on the upper surface of the funnel-shaped filter membrane (21).

7. A high-purity stainless steel fermentation tank according to claim 1, characterized in that: The rotating rod (23) is fixedly connected to an installation ring (26) at one end away from the contact cylinder (22). The installation ring (26) is fixedly sleeved on the outer surface of the stirring shaft (27). The other end of the rotating rod (23) is fixedly connected to a bent end (24). A T-shaped shaft (25) is rotatably connected to the outer surface of the bent end (24). One end of the T-shaped shaft (25) is fixedly connected to the shaft end of the contact cylinder (22).

8. A high-purity stainless steel fermentation tank according to claim 1, characterized in that: An outer cover (32) is fixedly fitted on the outer surface of the tank (1). A spirally distributed heating tube (33) is provided between the outer cover (32) and the outer surface of the tank (1). The two ends of the heating tube (33) pass through the outer surface of the outer cover (32) and are fixedly connected to heating liquid inlets (34). Several mounting seats (35) are fixedly connected to the outer surface of the tank (1) and near the top of the outer cover (32).

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