Multi-stage fermentation tank bubble digestion device

Abstract

The utility model relates to the technical field of fermentation tanks, and discloses a multi-stage fermentation tank bubble digestion device which comprises a fermentation tank, an exhaust pipe and an air inlet pipe are mounted on the fermentation tank, and a stirring group, a second-stage defoaming group and a third-stage defoaming group are mounted on the air inlet pipe; a first-stage defoaming group, a fourth-stage defoaming group and a driving part are mounted on the fermentation tank, and the driving part is used for driving the air inlet pipe and the rotating shaft to rotate. The multi-stage defoaming group is arranged, so that on one hand, the volume and the quantity of bubbles generated in the fermentation process are as small as possible, the dissolved oxygen content in fermentation liquor is greatly increased, and the fermentation efficiency is improved; on the other hand, the condition of fermentation liquor loss caused by excessive overflow of bubbles from the fermentation tank is prevented, the cost can be saved, and the fermentation liquor can be prevented from being polluted; the spiral stirring rod is arranged, so that the oxygen can be uniformly distributed in the fermentation tank at the spraying position of the gas flow-out opening, and the mixing efficiency of the oxygen and the fermentation liquid is improved in cooperation with the stirring effect.

Description

Technical Field

[0001] This utility model relates to the field of fermentation tank technology, specifically, a multi-stage fermentation tank bubble elimination device. Background Technology

[0002] A fermenter is a container used in microbial fermentation processes and is widely used in the food, pharmaceutical, and chemical industries. In these industries, microbial fermentation is used to produce various products, such as alcohol, soy sauce, antibiotics, and amino acids. When some aerobic bacteria (e.g., yeast, lactic acid bacteria) ferment, it is necessary to continuously supply oxygen to the fermenter to accelerate their reproduction; however, when oxygen is introduced, a large number of bubbles will be generated on the surface of the fermentation liquid. If these bubbles are not eliminated, they may overflow the fermenter, reducing fermentation efficiency.

[0003] Existing fermenters are usually equipped with bubble elimination devices, but most of these devices are too simple, resulting in low defoaming efficiency; in some cases, the bubble elimination rate cannot keep up with the bubble generation rate, so there is still a risk of bubbles overflowing. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage fermenter bubble defoaming device to solve the problem that the existing defoaming devices in fermenters are too simple and have a low defoaming rate.

[0005] This utility model is achieved through the following technical solution: a multi-stage fermenter bubble defoaming device, comprising a fermenter, on which are installed a feed pipe, an exhaust pipe, an air inlet pipe, and a discharge pipe; a rotary joint and a stirring assembly are installed on the air inlet pipe; a secondary defoaming assembly and a tertiary defoaming assembly are installed on the air inlet pipe; a primary defoaming assembly and a quaternary defoaming assembly are installed on the fermenter; the primary defoaming assembly includes multiple ultrasonic vibration plates installed on the inner wall of the fermenter; the secondary defoaming assembly includes a crushing rod; the tertiary defoaming assembly includes a pusher plate; the quaternary defoaming assembly includes an auxiliary defoaming box, which has a window, and a corresponding window is also provided on the fermenter; a reflux pipe is installed on the auxiliary defoaming box, the other end of which is connected to the fermenter; a rotating shaft is installed on the auxiliary defoaming box, and a crushing blade is installed on the rotating shaft; a drive unit is installed on the fermenter, which drives the air inlet pipe and the rotating shaft to rotate, and the rotation speed of the rotating shaft is greater than that of the air inlet pipe.

[0006] To better realize this utility model, the auxiliary defoaming box is further equipped with a five-stage defoaming group. The five-stage defoaming group includes an outlet pipe, one end of which is connected to the fermentation tank and the other end of which is connected to the auxiliary defoaming box. A nozzle is installed at one end of the outlet pipe in the auxiliary defoaming box, and a water pump is installed on the outlet pipe. The water pump is installed on the auxiliary defoaming box.

[0007] To better realize this utility model, the drive unit further includes a motor, which is mounted on the fermenter. A second gear is installed at the output end of the motor, and a first gear is installed on the air inlet pipe. The second gear meshes with the first gear. A belt is sleeved between the rotating shaft and the motor. The number of teeth on the second gear is less than the number of teeth on the first gear. The diameter of the pulley on the motor is greater than the diameter of the pulley on the rotating shaft.

[0008] To better realize this utility model, the blades on the push plate are further inclined.

[0009] To better realize this utility model, the lever on the breaking rod is continuously curved in an "S" shape, and the lever is provided with dense needle-like spikes.

[0010] To better realize this utility model, the stirring assembly further includes a connecting pipe, on which a stirring rod is installed. The stirring rod is spiral-shaped and has a gas outlet.

[0011] To better realize this utility model, the gas outlet is further provided to be spirally arranged around the spiral stirring rod.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0013] (1) By setting up a multi-stage defoaming group, this utility model can, on the one hand, make the volume of bubbles generated during fermentation as small as possible and the number as small as possible, and greatly increase the dissolved oxygen in the fermentation liquid, thereby improving the fermentation efficiency; on the other hand, it can prevent excessive bubbles from overflowing the fermentation tank and causing the fermentation liquid to be lost, which can save costs and prevent the fermentation liquid from being contaminated.

[0014] (2) By setting a spiral stirring rod, the present invention enables the oxygen to be evenly distributed in the fermenter at the outlet of the gas flow, rather than being limited to the center of the air inlet pipe. Combined with the stirring action, the mixing efficiency of oxygen and fermentation liquid is improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0017] Figure 3 This is a partial structural cross-sectional view of the present invention.

[0018] Figure 4 This is a schematic diagram of the mixing group, the secondary defoaming group, and the tertiary defoaming group.

[0019] Figure 5 This is a schematic diagram of the mixing unit structure.

[0020] Figure 6 This is a schematic diagram of the drive unit structure.

[0021] Wherein: 101-Mounting base; 102-Fermentation tank; 103-Feed pipe; 104-Exhaust pipe; 105-Rotary joint; 106-Air inlet pipe; 107-Auxiliary defoaming box; 108-Push plate; 109-Ultrasonic vibrating plate; 110-Discharge pipe; 111-Outlet pipe; 112-Return pipe; 113-Water pump; 114-Nozzle; 115-Stirring rod; 116-Connecting pipe; 117-Gas outlet; 118-Crushing rod; 119-First gear; 120-Second gear; 121-Belt; 122-Shaft; 123-Crushing blade; 124-Motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1:

[0025] This embodiment provides a multi-stage fermenter bubble elimination device, specifically as follows: Figures 1-4As shown, the system includes a fermentation tank 102, which is mounted on a mounting base 101. The fermentation tank 102 is equipped with a feed pipe 103, an exhaust pipe 104, an air inlet pipe 106, and a discharge pipe 110. The air inlet pipe 106 is equipped with a rotary joint 105 and a stirring assembly. The rotary joint 105 is a commercially available part. The air inlet pipe 106 is equipped with a secondary defoaming assembly and a tertiary defoaming assembly. The fermentation tank 102 is equipped with a primary defoaming assembly and a quaternary defoaming assembly. The primary defoaming assembly includes multiple ultrasonic vibration plates 109 installed on the inner wall of the fermentation tank 102. The ultrasonic vibration plates 109 are commercially available equipment, as those skilled in the art will know; their specific principles and structures will not be elaborated further. The ultrasonic vibration plates 109 are located below the fermentation liquid surface. The secondary defoaming assembly includes a crushing rod 118, and the tertiary defoaming assembly includes a pusher plate. 108. The push plate 108 and the crushing rod 118 are positioned above the fermentation liquid surface. The four-stage defoaming group includes an auxiliary defoaming box 107, which has a window. A corresponding window is also provided on the fermentation tank 102. A return pipe 112 is installed on the auxiliary defoaming box 107, and the other end of the return pipe 112 is connected to the fermentation tank 102. A rotating shaft 122 is installed on the auxiliary defoaming box 107, and a crushing blade 123 is installed on the rotating shaft 122. A drive unit is installed on the fermentation tank 102. The drive unit is used to drive the air inlet pipe 106 and the rotating shaft 122 to rotate. The rotation speed of the rotating shaft 122 is greater than that of the air inlet pipe 106. The reason why the rotation speed of the air inlet pipe 106 should not be too fast is that the rotational resistance of the stirring group in the fermentation liquid is large. Therefore, low-speed rotation is sufficient to achieve the stirring effect and minimize power consumption.

[0026] During fermentation, the air inlet pipe 106 is connected to an external oxygenation device via a rotary joint 105. Oxygen then enters the fermentation broth through the air inlet pipe 106, providing oxygen to the microorganisms. Simultaneously, the activation of the ultrasonic vibration plate 109 breaks down the large number of oxygen bubbles released at the air inlet pipe 106, reducing their volume—that is, dispersing a large bubble into multiple smaller bubbles. This increases the contact area between oxygen and the fermentation broth, increasing the dissolved oxygen content. Furthermore, the air inlet pipe 106 drives the stirring unit to agitate the fermentation broth, which, combined with the vibration of the ultrasonic vibration plate 109, ensures more thorough and uniform mixing of oxygen in the fermentation broth, which is beneficial for microbial reproduction. Because the oxygen bubbles are dispersed, the volume of individual bubbles generated on the surface of the fermentation broth also decreases, preventing the formation of large bubbles and facilitating subsequent defoaming operations. When the accumulated bubble height on the fermentation broth reaches the breaking point... When the crushing rod 118 is at the point of impact, it will collide with the air intake pipe 106 to achieve defoaming. If the bubbles rise further and reach the crushing rod 118, it will also rotate with the air intake pipe 106. At this time, the pusher plate 108 will also collide with the bubbles. However, the main function of the pusher plate 108 is to push the bubbles to the window on the fermenter 102 and then into the auxiliary defoaming box 107 through the window. The bubbles are then collided with the crushing blade 123 in the auxiliary defoaming box 107. Since the rotating shaft 122 rotates faster, the defoaming rate of the high-speed rotation of the crushing blade 123 is greater than that of the crushing rod 118. The fermentation liquid that accumulates after the bubbles dissipate in the auxiliary defoaming box 107 flows back to the fermenter 102 through the return pipe 112.

[0027] By setting up multi-stage defoaming groups, on the one hand, the volume and number of bubbles generated during fermentation are minimized, and the dissolved oxygen content in the fermentation liquid is greatly increased, thus improving fermentation efficiency; on the other hand, it prevents excessive bubbles from overflowing the fermentation tank 102 and causing the fermentation liquid to be lost, which can save costs and prevent the fermentation liquid from being contaminated.

[0028] Example 2:

[0029] This embodiment further extends the above embodiment, specifically as follows: Figures 1-3 As shown, the auxiliary defoaming box 107 is equipped with a five-stage defoaming group. The five-stage defoaming group includes an outlet pipe 111. One end of the outlet pipe 111 is connected to the fermentation tank 102, and the other end is connected to the auxiliary defoaming box 107. A nozzle 114 is installed at one end of the outlet pipe 111 in the auxiliary defoaming box 107. A water pump 113 is installed on the outlet pipe 111. The water pump 113 is installed on the auxiliary defoaming box 107.

[0030] To prevent air bubbles in the auxiliary defoaming box 107 from remaining suspended and failing to sink, thus preventing the crushing blades 123 from achieving rapid defoaming, the water pump 113 is activated. The water pump 113 pumps the fermentation liquid from the bottom of the fermentation tank 102 into the nozzle 114, which then sprays the liquid. This sprayed fermentation liquid washes over the air bubbles in the auxiliary defoaming box 107, achieving defoaming through rinsing and using the impact force of the spray to press down the suspended air bubbles in the auxiliary defoaming box 107, allowing the crushing blades 123 to effectively impact the bubbles and achieve rapid defoaming.

[0031] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0032] Example 3:

[0033] This embodiment further extends the above embodiment, specifically as follows: Figure 2 , Figure 6 As shown, the drive unit includes a motor 124, which is mounted on the fermenter 102. A second gear 120 is mounted on the output end of the motor 124, and a first gear 119 is mounted on the air inlet pipe 106. The second gear 120 meshes with the first gear 119. A belt 121 is sleeved between the rotating shaft 122 and the motor 124. The number of teeth of the second gear 120 is less than the number of teeth of the first gear 119. The diameter of the pulley on the motor 124 is larger than the diameter of the pulley on the rotating shaft 122.

[0034] When the motor 124 starts, the second gear 120 drives the first gear 119, and the first gear 119 drives the intake pipe 106 to rotate. At this time, the speed of the intake pipe 106 is lower than the speed of the motor 124. At the same time, the motor 124 drives the rotating shaft 122 to rotate through the belt 121. The speed of the rotating shaft 122 is greater than the speed of the motor 124. This achieves the graded distribution of power.

[0035] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0036] Example 4:

[0037] This embodiment further extends the above embodiment, specifically as follows: Figure 4 As shown, the blades on the push plate 108 are inclined. When the push plate 108 rotates and pushes the bubbles, the force applied to the bubbles is obliquely downward, thereby squeezing the bubbles between the fermentation liquid and the push plate 108 to ensure that the crushing rod 118 can work fully. At the same time, a certain pressure can also squeeze the bubbles to achieve a fine defoaming function. The main purpose is to prevent the bubbles from overflowing from the exhaust pipe 104 through the push plate 108.

[0038] The lever on the crushing rod 118 is continuously curved in an "S" shape to increase the total length of the crushing rod 118. The lever is also equipped with dense needle-like spikes to puncture air bubbles and improve defoaming efficiency.

[0039] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0040] Example 5:

[0041] This embodiment further extends the above embodiment, specifically as follows: Figures 2-5 As shown, the stirring assembly includes a connecting pipe 116, on which a stirring rod 115 is mounted. The stirring rod 115 is spiral-shaped and has a gas outlet 117. The spiral shape of the stirring rod 115 ensures that the oxygen ejected from the gas outlet 117 is evenly distributed throughout the fermenter 102, rather than being limited to the axis of the inlet pipe 106. This, combined with the stirring action, improves the mixing efficiency of oxygen and fermentation broth.

[0042] Preferably, the gas outlet 117 is spirally arranged around the spiral stirring rod 115, so that the gas outlet 117 is not only evenly distributed in the space of the fermenter 102 along with the rotary joint 105, but also evenly distributed around the stirring rod 115, thereby increasing the oxygen injection range and further improving the mixing efficiency of oxygen and fermentation liquid.

[0043] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A multi-stage fermenter bubble elimination device, comprising a fermenter (102), wherein the fermenter (102) is equipped with a feed pipe (103), an exhaust pipe (104), an air inlet pipe (106), and a discharge pipe (110), wherein the air inlet pipe (106) is equipped with a rotary joint (105) and a stirring assembly, characterized in that: The air inlet pipe (106) is equipped with a secondary defoaming group and a tertiary defoaming group; the fermentation tank (102) is equipped with a primary defoaming group and a quaternary defoaming group; the primary defoaming group includes multiple ultrasonic vibration plates (109) installed on the inner wall of the fermentation tank (102); the secondary defoaming group includes a breaking rod (118); the tertiary defoaming group includes a pusher plate (108); the quaternary defoaming group includes an auxiliary defoaming box (107), the auxiliary defoaming box (107) is provided with a window, and the fermentation tank (102) is equipped with a primary defoaming group and a quaternary defoaming group. A window is also set at the corresponding position; a reflux pipe (112) is installed on the auxiliary defoaming box (107), and the other end of the reflux pipe (112) is connected to the fermentation tank (102). A rotating shaft (122) is installed on the auxiliary defoaming box (107), and a crushing blade (123) is installed on the rotating shaft (122); a drive unit is installed on the fermentation tank (102), and the drive unit is used to drive the air inlet pipe (106) and the rotating shaft (122) to rotate, and the rotation speed of the rotating shaft (122) is greater than that of the air inlet pipe (106).

2. A multi-stage fermenter bubble demolition device according to claim 1, characterised in that: The auxiliary defoaming box (107) is equipped with a five-stage defoaming group, which includes an outlet pipe (111). One end of the outlet pipe (111) is connected to the fermentation tank (102), and the other end is connected to the auxiliary defoaming box (107). A nozzle (114) is installed at one end of the outlet pipe (111) in the auxiliary defoaming box (107). A water pump (113) is installed on the outlet pipe (111), and the water pump (113) is installed on the auxiliary defoaming box (107).

3. A multi-stage fermenter bubble demolition device according to claim 1, characterized in that: The drive unit includes a motor (124), which is mounted on the fermenter (102). A second gear (120) is mounted on the output end of the motor (124), and a first gear (119) is mounted on the air inlet pipe (106). The second gear (120) meshes with the first gear (119). A belt (121) is sleeved between the rotating shaft (122) and the motor (124). The number of teeth of the second gear (120) is less than the number of teeth of the first gear (119). The diameter of the pulley on the motor (124) is greater than the diameter of the pulley on the rotating shaft (122).

4. A multi-stage fermenter bubble demolition device according to claim 1, characterized in that: The blades on the push plate (108) are arranged at an angle.

5. A multi-stage fermenter bubble demolition device according to claim 1, characterized in that: The lever on the breaking rod (118) is continuously curved in an "S" shape, and the lever is provided with dense needle-like spikes.

6. A bubble demolition device for a multi-stage fermenter according to any one of claims 1 to 5, characterised in that: The stirring assembly includes a connecting pipe (116), on which a stirring rod (115) is installed. The stirring rod (115) is spiral in shape and has a gas outlet (117).

7. A multi-stage fermenter bubble demolition device according to claim 6, characterised in that: The gas outlet (117) is spirally wrapped around the spiral stirring rod (115).

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