A fermentation device of marine active polysaccharide

Abstract

The application discloses a fermentation equipment for marine active polysaccharide, which comprises a tank body, a stirring device and a ventilation device arranged in the tank body; the stirring device comprises a rotating shaft and at least one stirring blade, the stirring blade rotates around the center of the rotating shaft; the ventilation device comprises a bubbling platform for ventilating the tank body, the bubbling platform is arranged below the rotating shaft and coaxial with the rotating shaft; wherein the stirring blade is arranged in close contact with the bubbling platform, and when the stirring blade rotates around the center of the rotating shaft, the stirring blade can scrape off the substrate remaining on the bubbling platform. The technical scheme of the application aims to stabilize the oxygen supply in the tank body and improve the fermentation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fermentation equipment, in particular to a fermentation equipment for marine active polysaccharide. BACKGROUND

[0002] Marine active polysaccharides, such as fucoidan, carrageenan, agarose, and marine beta-glucan, are widely used in food, medicine, and cosmetics due to their unique biocompatibility, antioxidant properties, and immunomodulatory activity. However, the extraction of polysaccharides from natural marine organisms is limited by seasonal and environmental factors, and the extraction process is complex and costly. Fermentation technology has become a key alternative for industrial production. For example, through metabolic regulation of microorganisms, target polysaccharides can be efficiently synthesized under controllable conditions, and their molecular weight and functional properties can be optimized. Generally, the substrate in the fermentation process of marine active polysaccharides includes carbon source, nitrogen source, and microorganisms. In the fermentation process of marine active polysaccharides, the carbon and nitrogen sources, dissolved oxygen content, and stirring conditions need to be adjusted to achieve directional modification of the product structure, thereby improving the biological activity and stability of the product.

[0003] However, existing marine active polysaccharide fermentation equipment mostly uses mechanical stirring combined with bottom aeration design, such as ring-shaped aeration pipes or microporous aeration discs, to maintain high dissolved oxygen levels by introducing oxygen-rich air. However, such equipment has two major bottlenecks: on the one hand, the aeration device is prone to blockage, and high-viscosity fermentation broth, especially after polysaccharide secretion, is prone to form a gel-like residue around the air holes, causing air hole blockage, which requires frequent shutdown for cleaning, severely affecting continuous production efficiency and product consistency. On the other hand, the setting of ordinary air pipes requires the use of oxygen-rich air to meet the dissolved oxygen requirements of high-oxygen-consuming strains. Therefore, existing equipment requires additional oxygen generation or pure oxygen supply systems, which not only increases the complexity and energy consumption of the equipment, but also introduces oxygen concentration control risks, such as local over-oxygenation inhibiting bacterial activity. SUMMARY

[0004] The purpose of the present application is to provide a fermentation equipment for marine active polysaccharide, which aims to stabilize oxygen supply in the tank and improve fermentation efficiency.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A fermentation equipment for marine active polysaccharide, comprising a tank, wherein a stirring device and an aeration device are arranged inside the tank;

[0007] The stirring device comprises a rotating shaft and at least one stirring blade, and the stirring blade rotates around the center of the rotating shaft; the aeration device comprises a bubbling platform for aeration of the tank, and the bubbling platform is arranged below the rotating shaft and coaxial with the rotating shaft;

[0008] The stirring blade is arranged in close contact with the bubbling platform, and when the stirring blade rotates around the center of the rotating shaft, the stirring blade can scrape the substrate remaining on the bubbling platform.

[0009] In an embodiment of the present application, the bubbling platform is arranged at the bottom of the tank body, and the bubbling platform is a stepped circular platform, and the bubbling platform is formed with a first annular horizontal surface and a second annular curved surface arranged in sequence.

[0010] The first annular horizontal surface and / or the second annular curved surface are formed with a plurality of air holes, and when the stirring blade rotates, the stirring blade can scrape the substrate remaining around the air holes and mix the air in the air holes into the substrate.

[0011] In an embodiment of the present application, the bubbling platform is further provided with a support, and the stirring blade is further formed with a shaft sleeve coaxially arranged with the rotating shaft near the bubbling platform, and the shaft sleeve is rotationally matched with the support.

[0012] In an embodiment of the present application, each stirring blade is formed with a semi-cylindrical portion near the bubbling platform, and a plurality of stirring blades are connected by bolts, so that the semi-cylindrical portions form the shaft sleeve.

[0013] In an embodiment of the present application, the second annular curved surface is a conical generatrix curved surface, and the air holes are arranged in an annular array on the conical generatrix curved surface.

[0014] In an embodiment of the present application, the stirring blade is further formed with an action surface arranged in close contact with the conical generatrix curved surface; when the action surface is matched with the conical generatrix curved surface, the action surface and the first annular horizontal surface are spaced apart.

[0015] In an embodiment of the present application, one end of the stirring blade away from the bubbling platform is provided with a defoaming belt, the material of the defoaming belt is flexible, and the defoaming belt is used to eliminate the bubbles generated in the fermentation process of the substrate.

[0016] In an embodiment of the present application, the temperature control device further comprises a heat preservation shell arranged outside the bath tank.

[0017] The temperature control device comprises a bath column and a bath tank, the bath column is arranged in the tank body, and the bath tank is arranged outside the tank body.

[0018] In an embodiment of the present application, a spiral interlayer is arranged in the bath tank.

[0019] In an embodiment of the present application, the temperature control device further comprises a heat preservation shell arranged outside the bath tank.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The present scheme solves the technical defects of the traditional fermentation equipment, such as the air hole blockage of the microporous aeration disc caused by the residual substrate and the dependence on oxygen-rich air for oxygen supply, through the synergistic effect of the stirring device and the aeration device coaxially arranged in the tank body. Specifically, the stirring blade is attached to the bubble platform and rotates, continuously scraping off the substrate attached to the surface of the bubble platform during stirring, avoiding the blockage of the air holes by the gelatinous polysaccharide, and ensuring the smooth and clean air to be stably introduced; at the same time, the bubble platform is located below the rotating shaft and coaxial with the rotating shaft, so that the air is uniformly dispersed into the tank body through the bubble platform, and the clean air is broken into micron-sized bubbles under the shearing action of the stirring blade, which can significantly improve the oxygen dissolution efficiency in the substrate. This design makes the aeration device not need to rely on oxygen-rich air, and only needs to introduce clean air to realize the dynamic balance of the dissolved oxygen level in the tank body, which not only avoids the problems of dissolved oxygen fluctuation and frequent shutdown and cleaning caused by air hole blockage of the traditional equipment, but also shortens the fermentation period by optimizing the gas-liquid mixing efficiency, and finally realizes the efficient and stable continuous production of marine active polysaccharide. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0023] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and are not used to limit the limiting conditions of the embodiments of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0024] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the fermentation equipment for marine active polysaccharide of the present application;

[0025] Figure 2 FIG. 2 is a sectional view of FIG. 1; Figure 1

[0026] Figure 3 FIG. 3 is an enlarged view of A part in FIG. 2; Figure 2

[0027] Figure 4 FIG. 4 is an exploded schematic diagram of FIG. 2; Figure 1

[0028] ​​​Illustration: 100, fermentation equipment of marine active polysaccharide; 110, tank body;

[0029] 120, stirring device; 121, rotating shaft; 122, stirring blade; 123, shaft sleeve; 1221, semi-cylindrical part; 1222, active surface; 124, defoaming belt;

[0030] 130, aeration device; 131, bubble platform; 1311, first annular horizontal surface; 1312, second annular curved surface; 1313, air hole; 1314, support; 132, interval;

[0031] 140, temperature control device; 141, bath column; 142, bath; 1421, spiral interlayer; 143, heat preservation shell. DETAILED DESCRIPTION

[0032] In order to make the technical purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0034] The technical solutions of the present application will be further illustrated below in conjunction with the drawings and through specific embodiments.

[0035] The embodiment of the present application provides a fermentation equipment 100 of marine active polysaccharide.

[0036] Please refer to Figures 1 to 4 In an embodiment of the present application, the fermentation equipment 100 of marine active polysaccharide comprises a tank body 110, wherein the tank body 110 is provided with a stirring device 120 and an aeration device 130;

[0037] The stirring device 120 comprises a rotating shaft 121 and at least one stirring blade 122 rotating around the center of the rotating shaft 121; the aeration device 130 comprises a bubbling platform 131 for aerating the tank body 110, which is arranged below the rotating shaft 121 and coaxial with the rotating shaft 121.

[0038] In the present application, the stirring blade 122 is arranged in close contact with the bubbling platform 131, and when the stirring blade 122 rotates around the center of the rotating shaft 121, the stirring blade 122 can scrape off the substrate remaining on the bubbling platform 131.

[0039] In the present application, the stirring blade 122 is arranged in close contact with the bubbling platform 131, and when the stirring blade 122 rotates around the center of the rotating shaft 121, the stirring blade 122 can scrape off the substrate remaining on the bubbling platform 131.

[0040] It can also be understood that, in specific applications, the amount of dissolved oxygen in the substrate can be controlled by adjusting the rotating speed or working state of the rotating shaft 121, for example, the stirring blade 122 works intermittently.

[0041] In the specific embodiment, the tank body 110 can be a vertical cylindrical stainless steel container, and the volume is adjusted according to the fermentation scale. The top of the tank body 110 is provided with a sealing cover, a feeding port, a sensor interface (pH, dissolved oxygen probe), an exhaust port and a discharging port, etc. The inner wall of the tank body 110 is provided with a polishing treatment or a corrosion-resistant coating (such as polytetrafluoroethylene) to reduce the adhesion of polysaccharide.

[0042] Specifically, the tank body 110 serves as the main container, and the stirring device 120 and the aeration device 130 are both fixed inside the tank body 110, wherein the rotating shaft 121 is connected with an external driving member through a bearing seat at the top of the tank body 110.

[0043] Optionally, the rotating shaft 121 can be a solid or hollow shaft made of 316L stainless steel or titanium alloy; the driving member can be a servo motor, a variable frequency motor or a magnetic coupling driving system, with a rotating speed ranging from 50 rpm to 500 rpm.

[0044] Specifically, one end of the rotating shaft 121 is connected to the driving member through a shaft coupling, and the other end extends to the bottom of the tank body 110 and is coaxially arranged with the bubbling platform 131.

[0045] Further, the stirring blade 122 can be a paddle, an anchor or a combination of a turbine and an anchor; the number of blades can be 1-3 groups, which are distributed along the axial direction or the radial direction of the rotating shaft 121. The edges of the blades can be provided with sawtooth or scraper structures to enhance the shear force. Specifically, the stirring blade 122 is fixed to the rotating shaft 121, and the bottom thereof is in close contact with the surface of the bubbling platform 131, with a gap of less than 2 mm, so as to ensure contact with the surface of the bubbling platform 131 during rotation.

[0046] In the embodiment, the stirring blade 122 is an anchor blade, and the number of the stirring blade 122 is two, which are arranged in a central symmetry.

[0047] Optionally, the bubbling platform 131 can be in the shape of a sphere, a disc, a cone, a truncated cone or other approximate revolution bodies. Specifically, the air holes 1313 on the bubbling platform 131 have a diameter of 0.1-2 mm and a porosity of 10-40%. The center bottom of the bubbling platform 131 is provided with an air pipe interface, which is connected to an external clean air pipe through a flange. The bubbling platform 131 is fixed to the bottom of the tank body 110 and is coaxially installed with the rotating shaft 121. The surface of the bubbling platform 131 is located below the stirring blade 122, and the rotating track of the stirring blade 122 covers all or part of the air holes 1313 of the bubbling platform 131.

[0048] In a specific embodiment, the bottom of the stirring blade 122 can be provided with a flexible scraper (such as polyurethane or silicone) or a rigid metal scraper, which forms a sliding contact with the surface of the bubbling platform 131. When the stirring blade 122 rotates, the scraper / scraping plate scrapes off the residual substrate on the surface of the bubbling platform 131 and stirs clean air into the substrate, so as to improve the oxygen dissolution effect. It can be understood that the scraping action covers at least one side of the air hole 1313 every time the stirring blade 122 rotates one revolution, so as to prevent the substrate from accumulating around the air hole 1313 to form a gel-like blockage.

[0049] Optionally, in order to enhance the wear resistance between the bubbling platform 131 and the stirring blade 122, the surface of the bubbling platform is also coated with a wear-resistant coating, such as a chromium oxide coating, a diamond coating, etc.

[0050] Please refer to Figure 2 , Figure 3 and Figure 4In the specific embodiment of the present application, the bubbling platform 131 is arranged at the bottom of the tank body 110, and the bubbling platform 131 is a stepped circular platform, and the bubbling platform 131 is formed with a first annular horizontal surface 1311 and a second annular curved surface 1312 which are adjacent in sequence;

[0051] The first annular horizontal surface 1311 and / or the second annular curved surface 1312 are formed with a plurality of air holes 1313, and when the stirring blade 122 rotates, the stirring blade 122 can scrape the substrate remaining around the air holes 1313 and mix the air in the air holes 1313 into the substrate.

[0052] Specifically, the bubbling platform 131 is formed with a stepped difference, and the number of levels can be 2-4 levels.

[0053] Optionally, on the first annular horizontal surface 1311, the air holes 1313 are uniformly distributed along the circumferential direction, and the hole spacing is 3-10 times the hole diameter (for example, the hole diameter is 1 mm, and the spacing is 5 mm), which is arranged in a concentric circular array or a spiral array.

[0054] Optionally, on the second annular curved surface 1312, the air holes 1313 are distributed along the normal direction.

[0055] Further, the bottom edge of the stirring blade 122 is provided with a replaceable scraper, and the width of the scraper covers the air hole 1313 area, and the gap between the scraper and the surface of the bubbling platform 131 is less than or equal to 1 mm.

[0056] When the stirring blade 122 rotates, the scraper slides along the first annular horizontal surface 1311 and the second annular curved surface 1312, and the viscous substrate (such as polysaccharide colloid) attached around the air holes 1313 is scraped off and pushed to the center or edge area of the tank body 110.

[0057] It can be understood that, in the present embodiment, the hierarchical air hole 1313 layout and curved surface flow guide design of the stepped bubbling platform 131 further optimize the gas dispersion efficiency and anti-blocking capability: the planar air holes 1313 of the first annular horizontal surface 1311 provide basic aeration, and the inclined air holes 1313 of the second annular curved surface 1312 guide the movement of the bubbles along a specific path, forming a synergistic vortex with the rotation direction of the stirring blade 122, enhancing the uniformity of oxygen dissolution in the substrate; at the same time, the full-coverage scraping of the stirring blade 122 on the two-level air hole 1313 area completely removes the substrate residues in different planes and curved surface areas, avoiding the local blockage caused by the structural dead angle of the traditional single-plane bubbling platform 131.

[0058] Please refer to Figure 3 and Figure 4In specific embodiments, the bubbling platform 131 is further provided with a support column 1314, and the stirring blade 122 is further formed with a shaft sleeve 123 coaxially arranged with the rotating shaft 121 near the bubbling platform 131, and the shaft sleeve 123 is rotationally matched with the support column 1314.

[0059] Specifically, the support column 1314 can be cylindrical or conical. The support column 1314 is welded or bolted with the bubbling platform 131. The shaft sleeve 123 is a cylindrical or conical sleeve with an inner diameter matched with the outer diameter of the support column 1314. The shaft sleeve 123 is connected with the stirring blade 122 by welding, riveting or one-piece forming, and the axis thereof is coincident with the axis of the rotating shaft 121.

[0060] It can be understood that, by the rotationally matched support column 1314 and the shaft sleeve 123, the rigid positioning and dynamic stability of the stirring blade 122 and the bubbling platform 131 are achieved. Specifically, the support column 1314 as a guide structure forcibly restricts the radial displacement of the stirring blade 122, avoids the misalignment of the stirring blade 122 and the bubbling platform 131 caused by the swing of the rotating shaft 121 or the fluid impact, and thus maintains the continuous and effective scraping anti-blocking function.

[0061] In specific embodiments, each of the stirring blades 122 is formed with a semi-cylindrical part 1221 near the bubbling platform 131, and the plurality of stirring blades 122 are bolted to form the shaft sleeve 123 with the semi-cylindrical parts 1221.

[0062] Specifically, each of the stirring blades 122 is provided with a semi-cylindrical part 1221 at one end near the bubbling platform 131, and the cross section thereof can be semicircular. Specifically, the inner diameter of the semi-cylindrical part 1221 is matched with the outer diameter of the support column 1314. The semi-cylindrical parts 1221 of the adjacent two stirring blades 122 are bolted to form a complete cylindrical shaft sleeve 123, and are matched with the support column 1314 with a gap.

[0063] Specifically, the bolted connection allows the stirring blade 122 to be quickly disassembled, and facilitates the cleaning of the inner side of the semi-cylindrical part 1221 and the replacement of damaged parts.

[0064] It can be understood that, by the modular bolted connection design, the semi-cylindrical parts 1221 of the stirring blades 122 are combined into the shaft sleeve 123, which significantly improves the maintainability and assembly flexibility of the equipment: the split structure of the semi-cylindrical part 1221 allows the individual replacement of worn parts, avoids the overall scrapping of the traditional one-piece shaft sleeve 123 due to local damage, and reduces the maintenance cost of the equipment.

[0065] In a specific embodiment of the present application, the second annular curved surface 1312 is a conical generatrix curved surface, and the gas holes 1313 are arranged in an annular array on the conical generatrix curved surface.

[0066] Optionally, the taper angle of the conic generatrix surface is 15°-75°, preferably 30°-60°. The axis direction of the gas holes 1313 is inclined to the normal line at an angle of 5°-20° (tangential gas outlet), to guide the bubbles to move along the tangent direction of the conic surface, forming a cyclone effect, while the shearing action of the stirring blade 122 breaks the bubbles into micron-sized (50-200 μm) bubbles, increasing the gas-liquid contact area.

[0067] It can be understood that, through the annular array layout of the gas holes 1313 on the conic generatrix surface, the dual effects of directional flow guiding and efficient bubble breaking are achieved. Further, the taper angle of the conic surface cooperates with the tangential gas holes 1313 to diffuse the bubbles to the edge of the tank 110 when they rise along the conic surface under the action of centrifugal force, forming a circulating flow to enhance mixing uniformity. Moreover, the gas holes 1313 are arranged on the conic generatrix surface, which can reduce the risk of natural clogging of the gas holes 1313, and the accumulated substances around the gas holes 1313 can be removed by gravity.

[0068] Please refer to Figure 3 On the basis of the above embodiment, the stirring blade 122 is further formed with an action surface 1222 arranged in abutment with the conic generatrix surface; when the action surface 1222 cooperates with the conic generatrix surface, the action surface 1222 and the first annular horizontal surface 1311 form a gap 132.

[0069] Specifically, the action surface 1222 is an inclined sawtooth-shaped flat plate with the same inclination angle as the conic generatrix surface, and the gap between the action surface 1222 and the conic generatrix surface is less than or equal to 1 mm. The vertical distance between the bottom edge of the action surface 1222 and the first annular horizontal surface 1311 is 5-20 mm, which can prevent the stirring blade 122 from sinking excessively to compress the bubbling platform 131, and on the other hand, the high-viscosity polysaccharide substrate is prone to form a local high-pressure area in a narrow space during stirring, and the gap 132 provides a buffer channel for the substrate flow, preventing the material from being excessively compressed and adhering between the action surface 1222 and the first annular horizontal surface 1311, thereby protecting the edge structure of the stirring blade 122 from shear stress damage.

[0070] It should be further noted that, in this embodiment, to avoid ineffective scraping of the action surface 1222, no gas holes 1313 are arranged on the first annular surface.

[0071] Further, the first annular horizontal surface 1311 can be sprayed with a hydrophobic coating (such as polytetrafluoroethylene) or designed as a smooth mirror surface, further reducing substrate residue.

[0072] It can be understood that the embodiment can ensure efficient cleaning of the air hole 1313 while completely avoiding the mechanical damage risk caused by structural interference in the traditional device through the fit of the action surface 1222 with the conical surface and the interval 132: the interval 132 is designed to prevent the stirring blade 122 from excessively pressing the bubbling table 131 and to avoid the formation of extrusion dead zones of high-viscosity substrates in a closed space, thereby protecting the structure stability of the stirring blade 122; and the air holes 1313 are only distributed in the layout of the conical surface, so that the cleaning action is accurately focused on the effective aeration area, reducing the invalid friction loss. Compared with the rigid fit scheme without the interval 132, the embodiment can prolong the service life of the stirring blade 122, and improve the fluidity of the substrate through the buffering effect of the interval 132.

[0073] On the basis of the above-mentioned embodiments, as shown in Figure 3 The end of the stirring blade 122 away from the bubbling table 131 is provided with a defoaming belt 124, the material of the defoaming belt 124 is flexible, and the defoaming belt 124 is used to eliminate the bubbles generated in the fermentation process of the substrate.

[0074] Specifically, a large amount of bubbles is easily generated in the initial stage of substrate fermentation, and the design of the defoaming belt can avoid the monitoring distortion caused by the overflow of the fermentation liquid or the covering of the dissolved oxygen sensor by the foam.

[0075] It should be further pointed out that the defoaming belt 124 of the embodiment is not designed to completely eliminate the bubbles in the substrate, but to control the thickness of the bubbles in the substrate below a certain thickness. It can be understood that too much foam in the tank body 110 can easily increase the risk of bacterial contamination. Therefore, the fermentation device of the present application is especially suitable for high-viscosity and bubble-prone fermentation systems such as marine active polysaccharides, so that the purity and continuity of large-scale production of the product are guaranteed.

[0076] Optionally, the defoaming belt 124 is made of polyurethane material. Or the substrate of the defoaming belt 124 is a stainless steel woven mesh, and the surface is coated with a flexible layer such as silica gel + carbon fiber reinforced layer to balance its strength and elasticity.

[0077] Please refer to Figures 1 to 4 In a preferred embodiment of the present application, the fermentation device 100 of the marine active polysaccharide further comprises a temperature control device 140.

[0078] The temperature control device 140 comprises a bath column 141 and a bath tank 142, the bath column 141 is arranged in the tank body 110, and the bath tank 142 is arranged on the outer periphery of the tank body 110.

[0079] Specifically, the bath column 141 is cylindrical, square column or spiral coil structure, vertically distributed inside the tank body 110, the number is 2~4, arranged symmetrically along the circumference of the tank body 110 or annular array around the rotation axis 121. The bath column 141 is hollow inside, provided with an independent flow channel.

[0080] Optionally, the bath column 141 can be provided with fins or micro-pits on the outer surface, thereby enhancing the heat conduction efficiency with the fermentation broth.

[0081] It can be understood that the bath column 141 is suitable for local rapid temperature adjustment of high-viscosity polysaccharide fermentation broth, such as immediate cooling during the heat production peak period, thereby avoiding the inhibition of microorganisms in the substrate due to high temperature in the tank body 110.

[0082] Specifically, the bath 142 is a jacket structure around the outer wall of the tank body 110. The bath 142 is provided with a spiral interlayer 1421. Thus, the heat transfer medium is guided to flow along the axial or circumferential direction of the tank body 110, ensuring the uniformity of the heat preservation effect, and effectively realizing temperature regulation, such as rapidly increasing the temperature of the heat transfer medium in the bath 142 from 20℃ to 30℃ during the fermentation of marine active polysaccharide. Thus, the product yield and synthesis efficiency of marine active polysaccharide are further improved.

[0083] Further, the temperature control device 140 further comprises a heat preservation shell 143, which is arranged on the outer periphery of the bath 142.

[0084] Optionally, the heat preservation shell 143 is internally provided with a reflectivity material and a heat preservation material. The reflectivity material is attached to the outer wall of the bath 142 by hot pressing, thereby reducing radiation heat dissipation; the heat preservation material is polyurethane foaming material, thereby reducing heat loss. The heat preservation shell 143 is made of 304 stainless steel plate.

[0085] It can be understood that, by arranging the heat preservation shell 143 and the related structure, the heat performance attenuation is reduced, the fermentation energy consumption is reduced, and the applicability of marine active polysaccharide low-temperature fermentation is improved.

[0086] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fermentation apparatus for marine active polysaccharides, characterized in that, Includes a tank body, and the tank body is equipped with a stirring device and a venting device; The stirring device includes a rotating shaft and at least one stirring blade, the stirring blade rotating about the center of the rotating shaft; the venting device includes a bubbling platform for venting air into the tank, the bubbling platform being located below the rotating shaft and coaxial with the rotating shaft; The stirring blade is fitted to the bubbling platform, and when the stirring blade rotates around the center of the rotating shaft, the stirring blade can scrape off the substrate remaining on the bubbling platform. The bubbling platform is located at the bottom of the tank. The bubbling platform is a stepped frustum. The bubbling platform has a first annular horizontal surface and a second annular curved surface that are adjacent to each other in sequence. The first annular horizontal surface and / or the second annular curved surface have a plurality of air holes. When the stirring blade rotates, the stirring blade can scrape off the substrate remaining around the air holes and mix the air in the air holes into the substrate. On the first annular horizontal plane, the pores are evenly distributed along the circumference, and the pore spacing is 3 to 10 times the pore diameter. The pores are arranged in a concentric circle array or a spiral array. On the second annular surface, the pores are distributed along the normal direction. The second annular surface is a conical generatrix surface. The pores are arranged in annular array on the conical generatrix surface. The cone angle of the conical generatrix surface is 15°~75°. A replaceable scraper is provided at the bottom edge of the stirring blade. When the stirring blade rotates, the scraper slides along the first annular horizontal plane and the second annular curved surface to scrape off the viscous substrate attached to the pores and push it to the center or edge area of ​​the tank. The end of the stirring blade away from the bubbling platform is provided with a defoaming strip. The defoaming strip is made of flexible material and is used to eliminate bubbles generated by the substrate during fermentation.

2. The fermentation equipment for marine active polysaccharides according to claim 1, characterized in that, The bubbling platform is also provided with a support column, and the stirring blade is also provided with a bushing coaxially arranged with the rotating shaft near the bubbling platform. The bushing is rotatably engaged with the support column.

3. The fermentation equipment for marine active polysaccharides according to claim 2, characterized in that, Each of the stirring blades has a semi-cylindrical portion formed near the bubbling platform, and the plurality of stirring blades are connected by bolts so that the semi-cylindrical portion forms the bushing.

4. The fermentation equipment for marine active polysaccharides according to claim 1, characterized in that, The stirring blade also has an action surface that fits into the conical generatrix surface; when the action surface engages with the conical generatrix surface, the action surface is spaced from the first annular horizontal surface.

5. The fermentation apparatus for marine active polysaccharides according to any one of claims 1 to 4, characterized in that, It also includes a temperature control device; The temperature control device includes a bath column and a bath tank, with the bath column located inside the tank and the bath tank located on the outer periphery of the tank.

6. The fermentation equipment for marine active polysaccharides according to claim 5, characterized in that, The bath tub is equipped with a spiral interlayer.

7. The fermentation equipment for marine active polysaccharides according to claim 5, characterized in that, The temperature control device also includes an insulation shell, which is located on the outer periphery of the bath.

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