Defoamer for preparing curdlan, stirring machine head and fermentation device

Abstract

The utility model belongs to the technical field of microbial fermentation equipment, and particularly relates to a defoaming device for curdlan preparation, a stirring machine head and a fermentation device.The defoaming device comprises a cover body, a driving assembly and a foam breaking assembly, and the driving assembly comprises a motor and a first stirring shaft which are fixed to the top of the cover body; one end of the first stirring shaft penetrates through the cover body and is connected with the motor, and the other end of the first stirring shaft extends into the fermentation tank body; the foam breaking assembly comprises a floating part and a plurality of first blades, a through hole is formed in the gravity center of the floating part, a positioning groove is formed in the through hole, the first stirring shaft penetrates through the through hole and is slidably connected with the through hole, the shifting piece is located in the positioning groove, and the first blades are distributed on the surface of the floating part in the circumferential direction; the floating part moves up and down along the first stirring shaft under the influence of buoyancy of liquid in the fermentation tank body, so that first blades break foam floating on the liquid level in the rotating process; the stirring machine head comprises the defoaming device; the fermentation device comprises a fermentation tank and a stirring machine head.

Description

Technical Field

[0001] This application belongs to the technical field of microbial fermentation equipment, and particularly relates to an antifoamer, a mixer head, and a fermentation device for the preparation of curdlan gum. Background Art

[0002] Curdlan gum is a water-insoluble glucose prepared by microbial fermentation technology. Due to its high stability, safety, and gel properties, it can be used as a key additive in the pharmaceutical and food processing industries. Especially in various fields of the food industry, curdlan gum can be used as a stabilizer, thickener, binder, film-forming agent, etc., to meet the requirements of food for plasticity, taste, water retention, etc. The fermentation preparation process of curdlan gum requires complete fermentation equipment to improve the preparation quality. In the fermentation process, stirring plays a key role in the fermentation effect.

[0003] In the prior art, a rotating mixer head is used to stir the culture medium liquid in the fermentation tank to improve the fermentation efficiency. For example, a stirrer of a biological fermentation equipment disclosed in the Chinese utility model with the publication number CN219709457U includes a main body. A connecting shell is fixedly installed at the bottom of the main body, and a feed inlet and an exhaust port are connected and installed at the top of the main body. A rotating shaft is rotatably connected in the main body and the connecting shell, and an exhaust pipe is fixedly installed in the main body and the connecting shell. A plurality of stirring shafts are fixedly installed on the outer side of the rotating shaft. The rotating shaft and the stirring shafts are both cavity structures, and a plurality of through holes are opened on the outer side of the stirring shafts. Although this stirrer structure can play a stirring role, a large amount of foam is easily generated on the liquid surface during the stirring process. The foam has the following adverse effects on the fermentation broth: it affects the exhaust efficiency during the liquid fermentation process, thereby reducing the fermentation efficiency and the yield of curdlan gum; it blocks the line of sight and is not convenient for observing the fermentation progress of the liquid; as the foam gradually increases, the liquid storage capacity of the liquid storage equipment is reduced, and once an antifoaming agent is used to eliminate the foam, not only the production cost is increased, but also the risk of liquid contamination is increased. Summary of the Invention

[0004] Based on the above needs in the background art, this application provides an antifoamer, a mixer head, and a fermentation device for the preparation of curdlan gum, which are used to eliminate the foam on the surface of the fermentation broth during the stirring process and reduce the adverse effects of foam on the fermentation.

[0005] To achieve the above object, the technical solution of this application is:

[0006] An antifoaming device for preparing curdlan, which is used to eliminate the foam on the liquid surface in the fermentation tank body, includes a cover body, a driving component and a foam breaking component. The driving component includes a motor and a first stirring shaft. The motor is fixed on one side of the cover body. One end of the first stirring shaft penetrates through the cover body and is in transmission connection with the driving shaft of the motor, and the other end extends into the fermentation tank body. A paddle is arranged on the side surface of the first stirring shaft along the axial direction. The foam breaking component includes a floating part and a plurality of first blades. A through hole is arranged through the floating part along the gravity direction at the center of gravity of the floating part. A positioning groove is arranged in the through hole. The first stirring shaft passes through the through hole and is slidably connected with the through hole, and the paddle is located in the positioning groove. The first blades are evenly distributed around the circumference on the surface of the floating part. The floating part can move up and down along the axial direction of the first stirring shaft under the influence of the buoyancy of the liquid in the fermentation tank body.

[0007] Preferably, a blocking part is detachably arranged at one end of the first stirring shaft far from the motor, and the blocking part is used to prevent the floating part from falling off from the end of the first stirring shaft far from the motor.

[0008] Preferably, the blocking part is spherical.

[0009] Preferably, the side surface of the floating part far from the cover body is spherical or hemispherical.

[0010] Preferably, the foam breaking component further includes a mesh sheet, and the contour of the mesh sheet is circular; it is located below the first blades, and the center of the mesh sheet is rotatably connected with the surface of the floating part through a bearing around the circumference.

[0011] Preferably, the radius value of the mesh sheet is not less than the length value of the first blades and less than the radius value of the cross-section of the internal space of the fermentation tank body.

[0012] Preferably, a plurality of auxiliary floating blocks are evenly arranged at the contour of the side surface of the mesh sheet facing away from the first blades.

[0013] Preferably, a plurality of synapses are arranged in an array along the length extension direction of the first blades on the side surface of the first blades facing the mesh sheet, and at least part of the synapses are in contact with the surface of the mesh sheet.

[0014] This application also relates to a mixer head, which includes an antifoaming device for preparing curdlan and a second stirring shaft. The antifoaming device for preparing curdlan is the above-mentioned antifoaming device for preparing curdlan. One end of the second stirring shaft is in transmission connection with the end of the first stirring shaft far from the motor, and a plurality of second blades are evenly arranged around the axis at the other end.

[0015] The present application also relates to a fermentation device, including a fermentation tank, an intake pipe, an exhaust pipe, an inoculation pipe, and a mixer head. The fermentation tank is provided with an opening, and at least part of the intake pipe, the exhaust pipe, the inoculation pipe, and the mixer head extend into the fermentation tank through the opening, and the mixer head is the above-mentioned mixer head.

[0016] By adopting the above technical solution, compared with the prior art, the present application has at least the following beneficial effects:

[0017] The motor drives the floating part to rotate. The floating part floats on the liquid surface and drives the first blade to rotate close to the liquid surface. The edge of the first blade continuously sweeps the foam during the rotation process. As the foam on the surface of the fermentation broth is continuously broken by the first blade, the adverse effects caused by the foam on the fermentation broth during the fermentation process are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the fermentation device in the embodiment.

[0019] Figure 2 It is a partial enlarged view B of the antifoaming device for preparing curdlan in the embodiment.

[0020] Figure 3 It is a partial sectional view A-A of the fermentation device in the embodiment.

[0021] Figure 4 It is a partial enlarged view C of the partial sectional view A-A.

[0022] In the figure: antifoaming device 10, cover body 11, drive assembly 12, motor 121, first stirring shaft 122, paddle 1221, blocking part 1222, foam breaking assembly 13, floating part 131, through hole 1311, positioning groove 1312, first blade 132, synapse 1321, mesh 133, bearing 1331, auxiliary floating block 1332, mixer head 20, second stirring shaft 21, second blade 211, fermentation device 30, fermentation tank 31, intake pipe 32, exhaust pipe 33, inoculation pipe 34. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will further describe the technical solutions of the present application with reference to the drawings of the embodiments of the present application. The present application is not limited to the following specific embodiments.

[0024] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "rear", "top", "bottom", etc., the directions or positional relationships indicated are based on the azimuth or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structures or components referred to must have a specific azimuth, be constructed and operated in a specific azimuth. Therefore, the terms used to describe the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The following will further describe the present application in detail with reference to the Figure 1 accompanying Figure 4 drawings and specific embodiments.

[0026] In the present application, an antifoaming device 10 for preparing curdlan (hereinafter referred to as the antifoaming device 10) is disclosed. The antifoaming device 10 includes a cover body 11, a driving assembly 12, and a foam breaking assembly 13. Among them, the driving assembly 12 includes a motor 121 and a first stirring shaft 122. The motor 121 is fixed on one side of the cover body 11. One end of the first stirring shaft 122 penetrates through the cover body 11 and is in transmission connection with the driving shaft of the motor 121, and the other end extends into the fermentation tank body. A paddle 1221 is arranged on the side surface of the first stirring shaft 122 along the axial direction; the foam breaking assembly 13 includes a floating part 131 and a plurality of first blades 132. A through hole 1311 is arranged through the center of gravity of the floating part 131 along the gravity direction, and a positioning groove 1312 is arranged in the through hole 1311. The first stirring shaft 122 passes through the through hole 1311 and is slidably connected with the through hole 1311. The paddle 1221 is located in the positioning groove 1312. The first blades 132 are evenly distributed around the circumference on the surface of the floating part 131. The floating part 131 can move up and down along the axial direction of the first stirring shaft 122 under the influence of the buoyancy of the liquid in the fermentation tank body.

[0027] Specifically, the fermentation tank body is a cylindrical tank body, and the top of the tank body is provided with an open mouth. The cover body 11 is hermetically covered at the open mouth of the fermentation tank body. The motor 121 is fixed on the top of the cover body 11 and its driving shaft extends vertically downward; a sealing bearing is provided by drilling a hole in the center of the cover body 11. One end of the first stirring shaft 122 passes through the inner ring of the sealing bearing and is hermetically and fixedly connected to the inner ring. The inner ring of the sealing bearing is rotatable relative to the outer ring and the cover body 11; the paddle 1221 is arranged at the middle to lower section of the first stirring shaft 122 located on the lower surface of the cover body 11, and the number thereof can be 1 to 4; the floating part 131 is a rotating body that can float on the liquid surface in the fermentation tank 31 and has rotational stability. Its material is corrosion-resistant and oxidation-resistant plastic or other low-density materials. The shape of the surface profile in contact with the liquid surface is spherical, ellipsoidal or ship-shaped, etc., which helps to increase buoyancy. And the first blades 132 are uniformly fixed along the circumference on the part of the floating part 131 that is easy to float out of the liquid surface. In this embodiment, the number of the first blades 132 is preferably 4; the number of the positioning grooves 1312 in the through hole 1311 can be set equivalently to the number of the paddles 1221, and there should be corresponding clearance between the through hole 1311 and the first stirring rod and between the positioning groove 1312 and the paddle 1221, so that the floating part 131 can float smoothly under the influence of buoyancy.

[0028] In addition, the motor 121 is electrically connected to a power control system composed of electronic components including a power supply, a switch, etc. to achieve functional actions such as rotation, deceleration, and stop (the power control system is a conventional technical means for controlling the motor 121 and is not a technical feature necessary for solving the technical problems of this application. Therefore, it will not be described in detail herein and will not be elaborated hereinafter).

[0029] When using the defoamer 10 for preparing curdlan described above, before the cover body 11 is covered at the open mouth of the fermentation tank body, the lower end of the floating part 131 is sleeved on the first stirring shaft 122 first, and it should be noted that the paddle 1221 is located in the positioning groove 1312. After the cover body 11 is covered at the open mouth of the fermentation tank body, the lower end of the first stirring shaft 122 extends below the liquid surface in the fermentation tank body. At this time, the floating part 131 floats on the liquid surface and can float up and down along the first stirring shaft 122 as the liquid level rises or falls; after the motor 121 is powered on, the floating part 131 is driven by the first stirring shaft 122 to rotate, and the first blades 132 rotate on the liquid surface close to the liquid surface under the action of buoyancy.

[0030] Using the defoamer 10 for preparing curdlan described above has at least the following beneficial effects: the motor 121 drives the floating part 131 to rotate. The floating part 131 floats on the liquid surface and drives the first blades 132 to rotate close to the liquid surface. The edge of the first blades 132 continuously sweeps the foam during the rotation process. As the foam on the surface of the fermentation broth is continuously broken by the first blades 132, the adverse effects of the foam on the fermentation broth during the fermentation process are reduced.

[0031] In addition, the present application also provides some more specific embodiments to improve the above defoamer 10.

[0032] Furthermore, to prevent the floating part 131 from detaching from the first stirring shaft 122 during the process of the cover body 11 being closed on the fermentation tank body, a blocking part 1222 is detachably arranged at one end of the first stirring shaft 122 away from the motor 121.

[0033] Specifically, screw holes are provided on the surface of the blocking part 1222, and threads are provided on the lower end surface of the first stirring shaft 122. After the floating part 131 is sleeved on the first stirring shaft 122, the blocking part 1222 is fixed to the lower end of the first stirring shaft 122 through the screw holes; during the process of the first stirring shaft 122 extending into the fermentation tank 31, there is no need for an operator to hold the floating part 131 by hand, and the blocking part 1222 can prevent the above foam breaking assembly 13 from detaching from the first stirring shaft 122 on behalf of the operator.

[0034] In one of the embodiments, during the rotation of the first stirring shaft 122, to prevent the floating part 131 from contacting the blocking part 1222 and causing wear when floating up and down, the blocking part 1222 is in the shape of a sphere, and the surface of the sphere is kept smooth, which can reduce the wear on the floating part 131 during the rotation process and can also reduce the resistance of the liquid to the first stirring shaft 122.

[0035] Furthermore, to increase the buoyancy of the floating part 131 and make the blade float above the liquid level, one side surface of the floating part 131 away from the cover body 11 is in the shape of a spherical surface or a hemispherical surface.

[0036] Specifically, the lower end of the floating part 131 is in the shape of a spherical surface or a hemispherical surface, which can increase the drainage volume, increase the buoyancy of the liquid on the floating part 131 and the stability of the floating part 131 during rotation, keep the first blade 132 on the floating part 131 floating on the liquid level, and improve the efficiency of the first blade 132 in breaking foam.

[0037] In one of the embodiments, the above foam breaking assembly 13 further includes a mesh piece 133. The mesh piece 133 is a filter screen with a circular contour. A hole is punched at the center of the mesh piece 133 and it is rotatably connected to the surface of the floating part 131 through a bearing 1331, and the mesh piece 133 is located below the first blade 132.

[0038] When the defoamer 10 is used, the mesh 133 also floats on the liquid surface due to the buoyancy of the floating part 131. During the fermentation process, foam is formed on the upper surface of the mesh 133. During the rotation of the first stirring shaft 122, the foam is not easy to float up and down on the liquid surface due to the interception effect of the mesh 133, which can improve the efficiency and effect of the first blade 132 in breaking the foam. Moreover, under the action of the bearing 1331, the mesh 133 will not rotate synchronously with the floating part 131 and the first blade 132 due to the influence of the liquid resistance, thereby ensuring that the first blade 132 can rotate relative to the foam.

[0039] Specifically, in order to make the mesh 133 cooperate with the first blade 132 to further improve the efficiency of breaking foam, the radius of the mesh 133 is not less than the length of the first blade 132 and less than the radius of the cross section of the internal space of the fermenter body. Based on the above conditions, the mesh 133 can intercept most of the foam within the liquid level range of the fermenter body, and the length of the first blade 132 can also enable the first blade 132 to break the foam within the range of the mesh 133.

[0040] Furthermore, in order to increase the overall buoyancy of the foam breaking assembly 13, a plurality of auxiliary floating blocks 1332 are provided at the contour of the surface of the side of the mesh 133 away from the first blade 132. The auxiliary floating blocks 1332 are foam plastic blocks or hollow inflated air cushion blocks, which are used to increase the buoyancy of the mesh 133 so that the mesh 133 can easily float on the liquid surface.

[0041] Furthermore, to improve the efficiency of the first blade 132 in breaking foam, a plurality of synapses 1321 are arranged in an array along the length extension direction of the first blade 132 on one side surface of the first blade 132 facing the mesh 133 , and at least part of the synapses 1321 are in contact with the surface of the mesh 133 .

[0042] Specifically, the synapse 1321 is in any one or combination of filaments, columns or cones, and the lower end of the synapse 1321 contacts the upper surface of the mesh 133. During the rotation of the first blade 132, the plurality of synapses 1321 arranged in an array form a circular sweeping surface to break the fine foam in the pores of the mesh 133. The synapse 1321 increases the contact area between the first blade 132 and the foam, which can improve the efficiency of breaking the foam and the amount of foam broken.

[0043] The present application also discloses a mixer head 20, which includes the above-mentioned defoamer 10 and a second stirring shaft 21. On the basis of the above-mentioned defoamer 10, one end of the second stirring shaft 21 is connected to the lower end of the above-mentioned first stirring shaft 122 by setting a coupling, plug-in method or thread method to achieve transmission connection, and the lower end and middle section of the second stirring shaft 21 are evenly arranged with a plurality of second blades 211 around its axis.

[0044] When using the above-mentioned mixer head 20, start the motor 121 to drive the second stirring shaft 21 to rotate by the first stirring shaft 122. The second blade 211 is located below the liquid level and stirs the liquid to ensure the normal fermentation of the liquid. At the same time, the foam breaking assembly 13 in the mixer head 20 timely breaks the foam generated on the liquid surface during the fermentation process, which helps to improve the fermentation efficiency and exhaust efficiency of the liquid, and ensures that the amount of curdlan produced by the fermentation broth can reach the required amount.

[0045] In addition, the present application also discloses a fermentation device 30, which includes a fermentation tank 31, an air inlet pipe 32, an exhaust pipe 33, an inoculation pipe 34 and a mixer head 20. Among them, the mixer head 20 is the above-mentioned mixer head 20. An open mouth for cooperating with the cover body 11 in the above-mentioned mixer head 20 is provided at the top of the fermentation tank 31. At least part of the above-mentioned air inlet pipe 32, exhaust pipe 33, inoculation pipe 34 and mixer head 20 extends into the fermentation tank 31 through the open mouth.

[0046] Specifically, by opening holes in the above-mentioned cover body 11, one ends of the above-mentioned air inlet pipe 32, exhaust pipe 33 and inoculation pipe 34 can be communicated with the internal space of the fermentation tank 31. After the cover body 11 is hermetically sealed at the open mouth of the fermentation tank 31, the air inlet pipe 32 is used to introduce sterile oxygen into the fermentation tank 31 to meet the oxygen demand for fermentation of the fermenting bacteria; the exhaust pipe 33 is used to timely discharge the waste gas generated by fermentation to balance the gas phase pressure in the fermentation tank 31; the inoculation pipe 34 is used to timely inject the strain culture medium required for fermentation into the fermentation tank 31; a liquid discharge valve and a support seat and other structures are also provided at the bottom of the fermentation tank 31; the second stirring shaft 21 in the mixer head 20 extends into the fermentation tank 31 and is used to stir the fermentation broth to meet the fermentation needs.

[0047] Combining the structures and features in the above-mentioned embodiments, the above-mentioned fermentation device 30 can timely eliminate the foam on the surface of the fermentation broth during the fermentation process, which helps the operator to observe the fermentation progress of the liquid through the fermentation tank 31; and using the fermentation device 30 to prepare curdlan can reduce the production cost and the risk of product contamination, and avoid a large amount of foam occupying the liquid-carrying space in the fermentation tank 31, so that the fermentation process for preparing curdlan can be carried out efficiently.

[0048] Obviously, the above-mentioned embodiments of the present application are only examples clearly illustrating the present application, rather than limiting the implementation manners of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A defoamer for preparing curdlan, used to eliminate foam on the surface of liquid in a fermentation tank, characterized in that: include: A cover body, used for covering the open opening of the fermentation tank body; A driving assembly, the driving assembly comprising a motor and a first stirring shaft, the motor being fixed to one side of the cover body, one end of the first stirring shaft passing through the cover body and being transmission-connected to the driving shaft of the motor, and the other end extending into the fermentation tank body, a paddle being arranged axially on the side surface of the first stirring shaft; and, A foam breaking component, the foam breaking component includes a floating part and a plurality of first blades, a through hole is provided at the center of gravity of the floating part and penetrates the floating part along the gravity direction, a positioning groove is provided in the through hole, the first stirring shaft passes through the through hole and is slidably connected to the through hole, and the paddle is located in the positioning groove, the first blades are evenly distributed on the surface of the floating part around the circumference, and the floating part can be affected by the buoyancy of the liquid in the fermentation tank body and move up and down along the axial direction of the first stirring shaft.

2. The defoamer for preparing curdlan according to claim 1, characterized in that: A blocking portion is detachably provided at one end of the first stirring shaft away from the motor, and the blocking portion is used to prevent the floating portion from falling off from the end of the first stirring shaft away from the motor.

3. The defoamer for preparing curdlan according to claim 2, characterized in that: The blocking portion is in the form of a sphere.

4. The defoamer for preparing curdlan according to claim 1, characterized in that: A surface of the floating portion on one side away from the cover body is spherical or hemispherical.

5. The defoamer for preparing curdlan according to claim 1, characterized in that: The foam breaking assembly also includes a mesh, the outline of which is circular; it is located below the first blade, and the center of the mesh is rotatably connected to the surface of the floating part through a bearing around the circumference.

6. The defoamer for preparing curdlan according to claim 5, characterized in that: The radius of the mesh is not less than the length of the first blade and is less than the radius of the cross section of the internal space of the fermentation tank body.

7. The defoamer for preparing curdlan according to claim 5, characterized in that: A plurality of auxiliary floating blocks are evenly arranged at the contour of the surface of one side of the mesh away from the first blade.

8. The defoamer for preparing curdlan according to claim 5, characterized in that: A plurality of synapses are arranged in an array on a side surface of the first blade facing the mesh along a length extension direction of the first blade, and at least a portion of the synapses is in contact with the surface of the mesh.

9. A mixer head, characterized in that: It comprises a defoamer for preparing curdlan and a second stirring shaft, wherein the defoamer for preparing curdlan is the defoamer for preparing curdlan as claimed in any one of claims 1 to 8, one end of the second stirring shaft is transmission-connected to an end of the first stirring shaft away from the motor, and the other end has a plurality of second blades evenly arranged around the axis.

10. A fermentation device, characterized in that: It includes a fermentation tank, an air inlet pipe, an exhaust pipe, an inoculation tube and a mixer head. The fermentation tank is provided with an opening. At least parts of the air inlet pipe, the exhaust pipe, the inoculation tube and the mixer head extend into the fermentation tank through the opening. The mixer head is the mixer head described in claim 9.

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