Defoaming tank for microbial fermentation

Abstract

The defoaming tank comprises a tank body, a feeding pipe is inserted into the upper end of the tank body, a liquid outlet pipe is arranged at the bottom of the tank body, a motor is installed in the center of the bottom of the tank body, a rotating shaft vertically stretching into the center of the tank body is fixed to an output shaft of the motor, and the section of the rotating shaft is rectangular; a shaft sleeve and a sleeve which are in sliding connection with the base in the vertical direction sleeve the base, a bubble breaking rod is fixed to the side wall of the shaft sleeve, a floating plate is rotationally connected to the side wall of the sleeve, and the floating plate is located below the bubble breaking rod. According to the defoaming tank for microbial fermentation, bubbles entering the tank body float and are accumulated on the liquid level of fermentation liquid. The bubble breaking rod connected with the rotating shaft can be jacked up through the floating plate to float on the liquid level of fermentation liquid and is located at the same height as bubbles on the liquid level, and after the motor is started, the bubble breaking rod can be rotated through the rotating shaft to break the bubbles. The bubble breaking rod can automatically move and adjust along with the liquid level height of the fermentation liquid, so that the bubble breaking effect and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The application relates to a defoaming tank for microbial fermentation. BACKGROUND

[0002] The microbial bacteria solution is connected with the multi-stage seed tank and the main tank, and the bacteria are sequentially and gradually cultured in the seed tank and the main tank until the main tank. The defoaming tank is connected with the seed tank and the main tank, monitors the density and height of the bubbles in the fermentation process, and prevents the tank from being sprayed. The excess bubbles in the seed tank and the main tank enter the defoaming tank through the pipeline.

[0003] The existing defoaming tank for microbial fermentation can only receive and store the entering bubbles, part of the defoaming tank breaks the entering bubbles through pressure change, or dissolves the bubbles by loading a defoaming agent in the defoaming tank. The existing defoaming tank for microbial fermentation has low efficiency and poor effect by the pressure difference breaking method. The generation amount of the bubbles cannot be predicted, so that the addition amount of the defoaming agent cannot be controlled, and excessive addition will lead to that the fermentation solution after dissolution cannot be reused. CONTENT OF THE UTILITY MODEL

[0004] The application provides a defoaming tank for microbial fermentation, to solve the problems that the existing defoaming tank has low efficiency in breaking bubbles by pressure difference and is difficult to reuse after the defoaming agent is dissolved.

[0005] The application provides a defoaming tank for microbial fermentation, which comprises a tank body, a feed pipe is inserted into the upper end of the tank body, a liquid outlet pipe is arranged at the bottom of the tank body, a motor is installed at the center of the bottom of the tank body, a rotating shaft vertically extending into the center of the tank body is fixed on the output shaft of the motor, the cross section of the rotating shaft is rectangular, and an axle sleeve and a sleeve are sleeved with the rotating shaft and are vertically slidably connected with the rotating shaft, a bubble breaking rod is fixed on the side wall of the axle sleeve, a floating plate is rotationally connected to the side wall of the sleeve, and the floating plate is located below the bubble breaking rod.

[0006] Optionally, the bubble breaking rod comprises a rod body and a blade, and the cutting edge direction of the blade is fixed along the rotating direction of the rod body.

[0007] Optionally, a defoaming device is arranged above the rotating shaft and is fixed to the inner wall of the tank body, and the feed pipe penetrates through the defoaming device and extends into the lower end.

[0008] Optionally, a sprayer is arranged in the inner wall of the top wall of the tank body, and the sprayer is in communication with the pump body of the defoaming agent outside the tank body.

[0009] Optionally, a photoelectric sensor is arranged in the inner wall of the top of the tank body, and the photoelectric sensor is used for monitoring the height position of the bubbles, the photoelectric sensor is electrically connected to the pump body of the sprayer through a controller, and a liquid level window is arranged on the side wall of the tank body.

[0010] Optionally, the side wall of the tank body is conical, and a blowing pipe downward along the inner wall of the tank body is installed at the bottom edge of the defoamer.

[0011] Compared with the prior art, the microorganism fermentation defoaming tank has the following beneficial effects:

[0012] The bubbles entering the tank body float and accumulate on the liquid surface of the fermentation liquid. The bubble breaking rod connected with the rotating shaft can be lifted by the floating plate floating on the liquid surface of the fermentation liquid, and is at the same height as the bubbles on the liquid surface. After the motor is started, the bubble breaking rod can break the bubbles by rotating. The bubble breaking rod can move and adjust itself according to the liquid level of the fermentation liquid, improve the bubble breaking effect and efficiency, and at the same time, the liquefied fermentation liquid after physical breaking of the bubbles can be returned for use, reducing the loss. BRIEF DESCRIPTION OF DRAWINGS

[0013] 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 prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 The front view of the microorganism fermentation defoaming tank provided by an embodiment of the present application;

[0015] Figure 2 The microorganism fermentation defoaming tank provided by an embodiment of the present application Figure 1 The sectional view of the microorganism fermentation defoaming tank provided by an embodiment of the present application;

[0016] Figure 3 The bubble breaking rod of the microorganism fermentation defoaming tank provided by an embodiment of the present application;

[0017] Figure 4 The sectional view of the rod body and blade of the microorganism fermentation defoaming tank provided by an embodiment of the present application;

[0018] Figure 5 The blowing pipe position schematic view of the microorganism fermentation defoaming tank provided by an embodiment of the present application.

[0019] Explanation of reference signs:

[0020] Tank body 1; feed pipe 2; liquid outlet pipe 3; motor 4; rotating shaft 5; shaft sleeve 6; bubble breaking rod 7; rod body 701; blade 702; sleeve 8; floating plate 9; defoamer 10; sprayer 11; photoelectric sensor 12; blowing pipe 13; liquid level window 14. DETAILED DESCRIPTION

[0021] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of the present application.

[0022] As shown in Figures 1-3 An embodiment of the present application provides a defoaming tank for microbial fermentation, which comprises a tank body 1, a feed pipe 2 inserted into the upper end of the tank body 1, a liquid outlet pipe 3 arranged at the bottom of the tank body 1, a motor 4 arranged at the center of the bottom of the tank body 1, a rotating shaft 5 vertically inserted into the center of the tank body 1 and fixed on the output shaft of the motor 4, an axial sleeve 6 and a sleeve 8 sleeved on the rotating shaft 5 and vertically slidably connected with the rotating shaft 5, a bubble breaking rod 7 fixed on the side wall of the axial sleeve 6, and a floating plate 9 rotatably connected with the side wall of the sleeve 8, wherein the floating plate 9 is located below the bubble breaking rod 7.

[0023] The bubbles generated in the seed tank and the main tank enter the tank body 1 of the defoaming tank through the feed pipe 2 and are subjected to digestion and liquefaction in the tank body 1 to recover into fermentation liquid. The axial sleeve 6 and the sleeve 8 are sleeved on the rotating shaft 5, the bubble breaking rod 7 fixed on the axial sleeve 6 can rotate with the rotating shaft 5, and the floating plate 9 rotatably connected with the sleeve 8 can float on the fermentation liquid and is not affected by the rotation of the rotating shaft 5.

[0024] The sleeve 8 and the axial sleeve 6 can drive the floating plate 9 and the bubble breaking rod 7 to slide up and down along the rotating shaft 5. The floating plate 9 is located below the bubble breaking rod 7 and can lift the axial sleeve 6 and the bubble breaking rod 7 upward so that they are always located above the liquid surface. In use, the rotating shaft 5 is rotated by starting the motor 4 to drive the bubble breaking rod 7 to rotate through the axial sleeve 6, so that the bubble breaking rod 7 floating on the liquid surface breaks the bubbles on the liquid surface. The broken bubbles are subjected to digestion and liquefaction to form droplets and are merged into the fermentation liquid, and finally are discharged through the liquid outlet pipe 3.

[0025] In the embodiment, the bubbles entering the tank body 1 float and accumulate on the liquid surface of the fermentation liquid. The bubble breaking rod 7 connected with the rotating shaft 5 can be lifted by the floating plate 9 to float on the liquid surface of the fermentation liquid and is at the same height as the bubbles on the liquid surface. After the motor 4 is started, the bubble breaking rod 7 can be rotated by the rotating shaft 5 to break the bubbles. The bubble breaking rod 7 can move and adjust itself according to the height of the liquid surface of the fermentation liquid, which improves the breaking effect and efficiency of the bubbles, and at the same time, the liquefied fermentation liquid after the physical breaking of the bubbles can be used in return, thereby reducing the loss.

[0026] As shown in Figure 3 and Figure 4 In a possible implementation, the bubble breaking rod 7 comprises a rod body 701 and a blade 702, and the cutting edge direction of the blade 702 is fixed along the rotation direction of the rod body 701.

[0027] When the bubble-breaking rod 7 is rotated, the blade 702 provides a lateral shearing force, which quickly breaks the bubbles on the surface of the fermentation liquid.

[0028] In one possible implementation, a demister 10 fixed to the inner wall of the tank 1 is provided above the rotating shaft 5, and the feed pipe 2 extends into the lower end through the demister 10.

[0029] When the amount of bubbles is too large and they enter rapidly from the feed pipe 2, the bubbles that the bubble-breaking rod 7 fails to break in time will grow upward along the tank body 1. The bubbles at the top can be filtered out when they pass through the demister 10, breaking the bubbles from the top and separating the air in the bubbles, thus assisting the bubble-breaking rod 7 in defoaming.

[0030] In one possible implementation, a sprayer 11 is installed inside the top wall of the tank 1, and the sprayer 11 is connected to the external defoamer through a pump.

[0031] When too many bubbles grow upward along the tank 1 and pass through the demister 10, defoamer is sprayed out through the sprayer 11 to defoam and prevent the defoamer from spraying out of the tank.

[0032] In one possible implementation, a photoelectric sensor 12 is installed on the inner wall of the top of the tank 1 to monitor the height position of the bubbles. The photoelectric sensor 12 is electrically connected to the pump body of the sprayer 11 via a controller. A liquid level window 14 is provided on the side wall of the tank 1.

[0033] The photoelectric sensor 12 monitors the height of bubbles inside the tank 1. When the bubble height reaches a set threshold, it transmits a start signal to the controller, which then starts the pump to spray defoamer from the sprayer 11. The level window 14 is used to view the liquid level of the fermentation broth and the position of the bubbles.

[0034] like Figure 5 As shown, in one possible implementation, the sidewall of the tank 1 is conical, and the bottom edge of the demister 10 is equipped with a blower pipe 13 that runs downward along the inner wall of the tank 1, and the blower pipe 13 is connected to a fan.

[0035] The blower pipe 13 blows air along the conical inner wall of the tank 1 to the surface of the fermentation liquid, which can blow the bubbles at the edge of the fermentation liquid surface in the tank 1 toward the center. The bubbles are close to the bubble-breaking rod 7, which makes it easier for the bubble-breaking rod 7 to break the bubbles, thereby improving the efficiency and effect of defoaming.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A defoaming tank for microbial fermentation, comprising a tank body (1), a feed pipe (2) inserted into the upper end of the tank body (1), and a liquid outlet pipe (3) arranged at the bottom of the tank body (1), characterized in that: The bottom center of the tank body (1) is provided with a motor (4), the output shaft of the motor (4) is fixed with a rotating shaft (5) vertically extending into the center of the tank body (1), the cross section of the rotating shaft (5) is rectangular, and the rotating shaft (5) is sleeved with an axle sleeve (6) and a sleeve (8) which are vertically slidingly connected, the side wall of the axle sleeve (6) is fixed with a bubble breaking rod (7), the side wall of the sleeve (8) is rotatably connected with a floating plate (9), and the floating plate (9) is located below the bubble breaking rod (7).

2. The defoaming tank for microbial fermentation according to claim 1, characterized in that: The bubble breaking rod (7) comprises a rod body (701) and a blade (702), and the blade edge direction of the blade (702) is fixed along the rotating direction of the rod body (701).

3. The defoaming tank for microbial fermentation according to claim 1, characterized in that: The upper portion of the rotating shaft (5) is provided with a defoamer (10) fixed with the inner wall of the tank body (1), and the feeding pipe (2) penetrates through the defoamer (10) and extends into the lower end.

4. The antifoaming tank for microbial fermentation according to claim 1 or 3, characterized by: The inside of the top wall of the tank body (1) is provided with a sprayer (11) which is communicated with the pump body of the defoamer (10) through a pump body.

5. The defoaming tank for microbial fermentation according to claim 4, characterized in that: The inner wall of the top of the tank body (1) is provided with a photoelectric sensor (12) for monitoring the height position of the bubbles, the photoelectric sensor (12) is electrically connected with the pump body of the sprayer (11) through a controller, and the side wall of the tank body (1) is provided with a liquid level window (14).

6. The defoaming tank for microbial fermentation according to claim 3, characterized in that: The side wall of the tank body (1) is conical, the bottom edge of the defoamer (10) is provided with a blowing pipe (13) downwardly along the inner wall of the tank body (1), and the blowing pipe (13) is communicated with a fan.

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