Air multi-stage filtering and sterilizing device for microbial feed additive fermentation

Abstract

The present application relates to the technical fields of filtering and sterilization, in particular to a kind of air multi-stage filtering and sterilizing device for microbial feed additive fermentation, including filter box and filter cover, the filter cover is arranged at the top of filter box, for sealing filter box, the inside of filter box is provided with primary filter component, the primary filter component includes rotating rod, the rotating rod is rotatably connected to the top of filter cover, the surface of rotating rod is fixedly connected with several rotating frames, the primary filter component is driven rotating rod by motor in the present application, rotating frame and filter plate low-speed rotation are driven, filter plate is actively contacted and physically intercepts large particle dust and coarse impurities in the air entering filter box in the process of rotation, significantly improve the capture efficiency of coarse particle, effectively prolong the service life of coarse efficiency filter stage, reduce filter core replacement frequency and maintenance cost, ensure the continuity and stability of air supply in fermentation process.

Description

Technical Field

[0001] This invention relates to the field of filtration and sterilization technology, and in particular to a multi-stage air filtration and sterilization device for fermentation of microbial feed additives. Background Technology

[0002] In the fermentation production process of microbial feed additives, a large amount of sterile air needs to be continuously introduced into the fermentation tank to meet the metabolic needs of aerobic microorganisms. The air source is the external ambient air, which contains a large number of dust particles, microorganisms, moisture and oil mist and other impurities. If the air is directly introduced into the fermentation tank, it will cause the fermentation liquid to be contaminated with bacteria, resulting in the failure of the entire batch of fermentation and causing huge economic losses. Therefore, the air must be strictly filtered and sterilized before entering the fermentation tank.

[0003] Existing air filtration and sterilization devices mostly adopt single-stage or multi-stage fixed filter structure, with air passing through each stage of the filter to achieve filtration and sterilization. However, in actual operation, a large amount of coarse dust and impurities in the outside air will first impact the coarse filter stage, causing the surface of the coarse filter to become clogged rapidly, the filtration resistance to rise sharply, and the airflow to drop significantly, failing to meet the continuous air supply requirements of the fermentation process. Operators need to frequently stop the machine to disassemble and replace the clogged coarse filter, which not only increases the labor maintenance cost, but also causes the oxygen supply to be interrupted during the fermentation process, affecting the normal metabolic activities of microorganisms. In addition, the inside of the filter device comes into direct contact with the external environment during the disassembly and replacement of the filter, posing a risk of secondary pollution. Therefore, there is an urgent need for a multi-stage air filtration and sterilization device that can effectively extend the service life of the coarse filter stage, reduce the frequency of filter replacement, ensure a continuous and stable air supply, and is easy to maintain. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a multi-stage air filtration and sterilization device for fermentation of microbial feed additives.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-stage air filtration and sterilization device for microbial feed additive fermentation, comprising a filter box and a filter cover, wherein the filter cover is disposed on the top of the filter box for sealing the filter box, and a primary filtration assembly is disposed inside the filter box, wherein the primary filtration assembly includes a rotating rod, the rotating rod being rotatably connected to the top of the filter cover, and a plurality of rotating frames being fixedly connected to the surface of the rotating rod, wherein a filter plate is placed inside the rotating frame, and the filter plate rotates at a low speed with the rotating rod, for capturing large particulate dust and coarse impurities in the air by physical interception, thereby achieving primary coarse filtration pretreatment.

[0006] As a preferred embodiment of the present invention, the rotating frame is provided with a replacement component, which includes a replacement port and a device slot. The replacement port is located on both sides of the filter plate and is used to cooperate with the replacement block to achieve detachable fixing of the filter plate. The device slot is located on both sides of the inner cavity of the rotating frame and is used to accommodate the first spring and the replacement block.

[0007] As a preferred embodiment of the present invention, a first spring is fixedly connected to the opposite side of the inner cavity of each of the two device slots to provide elastic force to push the replacement block outward. A replacement block that cooperates with the replacement port is fixedly connected to the adjacent side of each of the two first springs. The replacement block is inserted into the inside of the replacement port under the elastic force of the first spring, so that the filter plate is fixed in the rotating frame. When the filter plate needs to be replaced, pressing the replacement block to retract it into the device slot can remove the filter plate from the rotating frame.

[0008] As a preferred embodiment of the present invention, a driving assembly is provided on the top of the filter cover. The driving assembly includes a motor housing, which is fixedly connected to the top of the filter cover. A motor is fixedly connected inside the motor housing to provide rotational driving force. One end of the rotating rod near the motor passes through the filter cover and the motor housing in sequence and extends into the interior of the motor housing. The end of the rotating rod extending into the interior of the motor housing is fixedly connected to the output shaft of the motor. The motor drives the rotating rod to rotate the rotating frame and the filter plate at low speed for primary coarse filtration.

[0009] As a preferred embodiment of the present invention, a plug-in assembly is provided at the bottom of the filter box cavity. The plug-in assembly includes a plug-in frame and a plug-in interface. The plug-in frame is rotatably connected to the bottom of the filter box cavity and is used to support the lower end of the rotating rod and provide rotation guidance. A plug-in block is fixedly connected inside the plug-in frame. The plug-in interface is opened at the end of the rotating rod near the plug-in block. The plug-in interface is inserted into the interior of the plug-in block to connect the rotating rod with the plug-in frame. Both the plug-in block and the plug-in interface are square. When the rotating rod rotates, the square shape drives the plug-in frame to rotate synchronously.

[0010] As a preferred embodiment of the present invention, the filter box is provided with a secondary filtration assembly, which includes a secondary filter plate and a fixing port. Several secondary filter plates are disposed in the lower part of the filter box cavity. The secondary filter plates are fixedly installed and do not rotate with the rotating rod. They are used to perform secondary deep filtration and sterilization on the air after primary coarse filtration pretreatment. Several fixing ports are opened on both sides of the filter box cavity and are used to cooperate with the fixing block to fix the secondary filter plates.

[0011] As a preferred embodiment of the present invention, the secondary filter plate has fixing grooves on both sides for accommodating the second spring and the fixing block. The two fixing grooves are fixedly connected to the side of their inner cavity that is close to each other, for providing elastic force to push the fixing block outward. The two second springs are fixedly connected to the side of their opposite sides. The fixing block is inserted into the fixing opening under the elastic force of the second spring, so that the secondary filter plate is fixed in the lower part of the filter box cavity. When the secondary filter plate needs to be replaced, pressing the fixing block to retract it into the fixing groove allows the secondary filter plate to be removed from the filter box.

[0012] As a preferred embodiment of the present invention, the bottom of the filter box is provided with an air outlet for outputting clean air after primary coarse filtration and secondary deep filtration sterilization to the fermentation system. The top of the filter cover is provided with an air inlet for introducing outside air into the filter box. After entering through the air inlet, the air first passes through the low-speed rotating filter plate in the primary filtration assembly to physically intercept large particles of coarse impurities, and then passes through the fixed secondary filter plate in the secondary filtration assembly for deep filtration sterilization. Finally, clean and sterile air is output from the air outlet.

[0013] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention utilizes a motor-driven rotating rod in the primary filtration assembly to rotate the rotating frame and filter plate at low speed. During rotation, the filter plate actively contacts and physically intercepts large dust particles and coarse impurities in the air entering the filtration chamber. Compared to traditional fixed coarse filter cartridges that passively wait for airflow to carry particles and impact the filter cartridge surface, the active interception method of the rotating filter plate increases the contact probability and contact area between the filter plate and airborne particles, significantly improving the capture efficiency of coarse particles. At the same time, the low-speed rotation makes it easier for the intercepted particles to fall off the filter plate surface and settle at the bottom of the filtration chamber under the action of centrifugal force and gravity, slowing down the clogging speed of the filter plate surface, effectively extending the service life of the coarse filtration stage, reducing the frequency of filter cartridge replacement and maintenance costs, and ensuring the continuity and stability of air supply during the fermentation process.

[0014] 2. In this invention, the filter plate is fixed in the rotating frame by inserting the replacement block into the replacement port under the elastic force of the first spring. When the filter plate needs to be replaced after a certain period of use due to the accumulation of coarse particles on its surface, the operator only needs to press the replacement block to compress the first spring retraction device slot and disengage it from the replacement port. The old filter plate can then be removed from the rotating frame and replaced with a new filter plate. The entire process does not require disassembling the rotating frame or rotating rod, nor does it require any tools. The replacement operation is simple and quick, significantly shortening maintenance time and reducing the impact on the fermentation gas supply process.

[0015] 3. In this invention, the motor housing in the drive assembly is fixed to the top of the filter cover to provide protection for the motor. The output shaft of the motor is fixedly connected to the top of the rotating rod, directly driving the rotating rod to rotate. The short transmission chain and compact structure reduce energy loss and failure points in the transmission links. The motor drives the rotating rod to rotate the filter plate at a low speed. The speed is controllable and the operation is stable. Compared with the passive filtration method that relies on airflow impact, it has stronger adaptability and controllability. The motor speed can be adjusted according to the actual air cleanliness and dust concentration to achieve the best primary coarse filtration effect.

[0016] 4. In this invention, several secondary filter plates are fixedly installed in the lower part of the filter box cavity in a two-stage filtration assembly and do not rotate with the rotating rod. The air, after being pre-treated by the primary coarse filtration, flows downward and passes through the fixed secondary filter plates for deep filtration and sterilization. The secondary filter plates use high-efficiency sterilization filter material, which can effectively intercept bacteria and microorganisms in the air. The two-stage filtration has a clear division of labor: the primary stage is responsible for removing coarse particles and protecting the secondary filter, while the secondary stage is responsible for fine sterilization to ensure that the air is sterile. The two stages work together to achieve progressive deep purification of the air. The sterilization efficiency is high and the load distribution of each filter is reasonable. The service life and operating economy of the overall filtration device are significantly improved.

[0017] 5. In this invention, the square insertion interface at the lower end of the rotating rod in the insertion assembly is inserted into the square insertion block inside the insertion frame to form a square mating connection. When the rotating rod rotates, the square mating drives the insertion frame to rotate synchronously at the bottom of the filter box. The insertion frame provides stable rotational support and axial positioning for the lower end of the rotating rod, preventing radial swaying or axial movement of the rotating rod during rotation. This ensures the smoothness and coaxiality of the rotation of the rotating rod and the rotating frame, making the rotational movement of the filter plate in the filter box more stable and reliable.

[0018] 6. This invention uses a fixing groove in the secondary filter plate to house a second spring and a fixing block. The fixing block, pushed by the spring force of the second spring, inserts into the fixing port on the inner wall of the filter box to fix the secondary filter plate. When the secondary filter plate needs to be replaced, pressing the fixing block causes it to retract into the fixing groove and disengage from the fixing port allows for easy disassembly. The installation and disassembly of the secondary filter plate are also tool-free and convenient. Both stages of the filter element in the entire device adopt a quick-replacement structure design, resulting in high maintenance efficiency. This effectively reduces the labor intensity of operators and the downtime of equipment maintenance, making it highly practical and easy to promote and apply in the microbial feed additive fermentation industry. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the filter box of the present invention; Figure 2 This is a schematic diagram of the rotating rod of the present invention; Figure 3 This is a schematic diagram of the structure of the groove in the device of the present invention; Figure 4This is a schematic diagram of the structure of the replacement port of the present invention; Figure 5 This is a schematic diagram of the fixing port structure of the present invention; Figure 6 This is a schematic diagram of the structure of the motor of the present invention; Figure 7 This is a schematic diagram of the plug-in frame of the present invention; Figure 8 This is a schematic diagram of the connector structure of the present invention. Figure 9 This is a schematic diagram of the fixing groove of the present invention.

[0020] Among them: 1. Filter box; 2. Filter cover; 30. Rotating rod; 31. Rotating frame; 32. Filter plate; 40. Replacement port; 41. Device slot; 42. First spring; 44. Replacement block; 50. Motor housing; 51. Motor; 60. Connector frame; 61. Connector interface; 62. Connector block; 70. Secondary filter plate; 71. Fixing port; 72. Fixing groove; 73. Second spring; 74. Fixing block; 80. Air outlet; 81. Air inlet. Detailed Implementation

[0021] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0022] Example: Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, a multi-stage air filtration and sterilization device for microbial feed additive fermentation includes a filter box 1 and a filter cover 2. The filter cover 2 is located on top of the filter box 1 to seal it. A primary filtration assembly is installed inside the filter box 1. This primary filtration assembly includes a rotating rod 30, which is rotatably connected to the top of the filter cover 2. Several rotating frames 31 are fixedly connected to the surface of the rotating rod 30. Filter plates 32 are placed inside the rotating frames 31 and rotate at low speed with the rotating rod 30 to capture large particles of dust and coarse impurities entering the air through physical interception, achieving primary coarse filtration pretreatment. A replacement assembly is installed inside the rotating frames 31. This replacement assembly includes a replacement port 40 and a device slot 41. The replacement port 40 is located on both sides of the filter plate 32 and cooperates with a replacement block 44 to achieve detachable fixing of the filter plate 32. The device slots 41 are located on both sides of the inner cavity of the rotating frames 31 to accommodate a first spring 42 and a replacement block 44. The inner cavities of two device slots 41 are opposite to each other. Each side is fixedly connected to a first spring 42, which provides elastic force to push the replacement block 44 outward. A replacement block 44, which mates with the replacement port 40, is fixedly connected to the side of each of the two first springs 42. The replacement block 44 is inserted into the replacement port 40 under the elastic force of the first spring 42, fixing the filter plate 32 inside the rotating frame 31. When the filter plate 32 needs to be replaced, pressing the replacement block 44 causes it to retract into the device slot 41, allowing the filter plate 32 to be removed from the rotating frame 31. A drive assembly is provided on the top of the filter cover 2. The drive assembly includes a motor housing 50, which is fixedly connected to the top of the filter cover 2. A motor 51 is fixedly connected inside the motor housing 50. The motor 51 is used to provide rotational driving force. The end of the rotating rod 30 near the motor 51 passes through the filter cover 2 and the motor housing 50 in sequence and extends into the interior of the motor housing 50. The end of the rotating rod 30 extending into the interior of the motor housing 50 is fixedly connected to the output shaft of the motor 51. The motor 51 drives the rotating rod 30 to drive the rotating frame 31 and the filter plate 32 to rotate at low speed for primary coarse filtration.

[0023] refer to Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the motor 51 is started, driving the rotating rod 30 to rotate at a low speed. The rotating rod 30 drives the rotating frame 31 and the filter plate 32 to rotate synchronously. Outside air enters the filter box 1 through the air inlet 81. Large dust particles and coarse impurities carried in the air are physically intercepted and captured by the slowly rotating filter plate 32 as they move in the airflow. They adhere to the surface of the filter plate 32 or are thrown against the inner wall of the filter box 1 by the centrifugal force of the rotating filter plate 32 and then settle at the bottom of the filter box 1, completing the first-stage coarse filtration pretreatment, removing large particles from the air. Coarse impurities are separated and removed first to reduce the burden on subsequent secondary filtration. When the filter plate 32 needs to be replaced after a certain period of use due to the accumulation of coarse particles on its surface, open the filter cover 2, press the replacement block 44, and the replacement block 44 will compress the first spring 42 and retract the device groove 41 to disengage from the replacement port 40. Remove the old filter plate 32 from the rotating frame 31, put the new filter plate 32 into the rotating frame 31, and the replacement block 44 will automatically insert into the replacement port 40 under the elastic force of the first spring 42 to complete the fixation. Then, put the filter cover 2 back on to resume use.

[0024] refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, a plug-in assembly is provided at the bottom of the inner cavity of the filter box 1. The plug-in assembly includes a plug-in frame 60 and a plug-in interface 61. The plug-in frame 60 is rotatably connected to the bottom of the inner cavity of the filter box 1, supporting the lower end of the rotating rod 30 and providing rotational guidance. A plug-in block 62 is fixedly connected inside the plug-in frame 60. The plug-in interface 61 is opened at the end of the rotating rod 30 near the plug-in block 62. The plug-in interface 61 is inserted into the interior of the plug-in block 62 to connect the rotating rod 30 to the plug-in frame 60. Both the plug-in block 62 and the plug-in interface 61 are square. When the rotating rod 30 rotates... When in motion, the square-shaped coupling drives the insertion frame 60 to rotate synchronously. The filter box 1 contains a secondary filtration assembly, which includes secondary filter plates 70 and fixing ports 71. Several secondary filter plates 70 are located in the lower part of the filter box 1's inner cavity. The secondary filter plates 70 are fixedly installed and do not rotate with the rotating rod 30. They are used for secondary deep filtration and sterilization of the air after primary coarse filtration pretreatment. Several fixing ports 71 are located on both sides of the filter box 1's inner cavity, used to cooperate with fixing blocks 74 to fix the secondary filter plates 70 in place. Both sides of the filter plate 70 are provided with fixing grooves 72 to accommodate the second spring 73 and the fixing block 74. The second spring 73 is fixedly connected to the side of the two fixing grooves 72 that are close to each other, so as to provide elastic force to push the fixing block 74 outward. The fixing block 74 is fixedly connected to the side of the two second springs 73 that are opposite to each other. The fixing block 74 is inserted into the fixing port 71 under the elastic force of the second spring 73, so that the secondary filter plate 70 is fixed in the lower part of the inner cavity of the filter box 1. When it is necessary to replace the secondary filter plate 70, press the fixing block 74 to make it retract into the fixing groove. 72. The secondary filter plate 70 can be removed from the filter box 1. The bottom of the filter box 1 is provided with an air outlet 80, which is used to output clean air after primary coarse filtration and secondary deep filtration sterilization to the fermentation system. The top of the filter cover 2 is provided with an air inlet 81, which is used to introduce outside air into the filter box 1. After the air enters from the air inlet 81, it first passes through the low-speed rotating filter plate 32 in the primary filtration component to physically intercept large particles of coarse impurities, and then passes through the fixed secondary filter plate 70 in the secondary filtration component for deep filtration sterilization. Finally, clean and sterile air is output from the air outlet 80.

[0025] refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9As shown, the secondary filter plate 70 is fixed in the lower part of the inner cavity of the filter box 1. The secondary filter plate 70 is made of high-efficiency sterilization filter material, which can effectively intercept and filter bacteria, microorganisms and fine particulate matter in the air, and complete the secondary deep filtration and sterilization of the air. The clean and sterile air after two-stage filtration is output from the air outlet 80 to the fermenter, providing a continuous and stable supply of sterile air for microbial fermentation. When the secondary filter plate 70 needs to be replaced, open the filter cover 2, press the fixing block 74, the fixing block 74 compresses the second spring 73 and retracts into the fixing groove 72 and disengages from the fixing port 71. Take out the old secondary filter plate 70 from the filter box 1, put the new secondary filter plate 70 into the lower part of the inner cavity of the filter box 1, and the fixing block 74 automatically inserts into the fixing port 71 under the elastic force of the second spring 73 to complete the fixation. After closing the filter cover 2, it can be used again.

[0026] Working principle: Before use: Refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, filter box 1 is installed on the air supply pipeline of the fermentation system. Filter cover 2 is sealed and fixed to the top of filter box 1 by bolts or clamps. Air inlet 81 is connected to the external air pipeline or air compressor outlet, and air outlet 80 is connected to the air inlet pipeline of the fermenter. The upper end of rotating rod 30 is rotatably connected to the top of filter cover 2 via bearing. The lower end of rotating rod 30 is squarely connected to plug block 62 in plug frame 60 via plug interface 61. Plug frame 60 is rotatably connected to the bottom of the inner cavity of filter box 1 via bearing. Several rotating frames 31 are fixed to the rotating... The filter plate 32 is placed inside the rotating frame 31 on the surface of the rod 30. The replacement block 44 is inserted into the replacement port 40 under the elastic force of the first spring 42 to fix the filter plate 32 inside the rotating frame 31. The motor box 50 is fixed to the top of the filter cover 2. The motor 51 is fixed inside the motor box 50. The output shaft of the motor 51 is fixedly connected to the top of the rotating rod 30. The secondary filter plate 70 is fixedly installed in the lower part of the inner cavity of the filter box 1. The fixing block 74 is inserted into the fixing port 71 under the elastic force of the second spring 73 to fix the secondary filter plate 70 to the inner wall of the filter box 1.

[0027] When using: Refer to Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the motor 51 is started, and the motor 51 drives the rotating rod 30 to rotate at a low speed. The rotating rod 30 drives the rotating frame 31 and the filter plate 32 to rotate synchronously. Outside air enters the filter box 1 through the air inlet 81. Large dust particles and coarse impurities carried in the air are physically intercepted and captured by the low-speed rotating filter plate 32 when they move in the airflow. They are attached to the surface of the filter plate 32 or thrown to the inner wall of the filter box 1 by the centrifugal force of the rotating filter plate 32 and then settle at the bottom of the filter box 1, completing the first-stage coarse filtration pretreatment, separating and removing large particles and coarse impurities in the air in advance, reducing the burden on the subsequent second-stage filtration.

[0028] refer to Figure 2 As shown, the secondary filter plate 70 is fixed in the lower part of the inner cavity of the filter box 1. The secondary filter plate 70 is made of high-efficiency sterilization filter material, which can effectively intercept and filter bacteria, microorganisms and fine particulate matter in the air, and complete the secondary deep filtration and sterilization of the air. The clean and sterile air after two-stage filtration is output from the air outlet 80 to the fermenter, providing a continuous and stable supply of sterile air for microbial fermentation.

[0029] refer to Figure 3 and Figure 4 As shown, when the filter plate 32 needs to be replaced after a certain period of use due to the accumulation of coarse particles on its surface, open the filter cover 2, press the replacement block 44, the replacement block 44 compresses the first spring 42 and retracts the device groove 41 out of the replacement port 40, remove the old filter plate 32 from the rotating frame 31, put the new filter plate 32 into the rotating frame 31, the replacement block 44 automatically inserts into the replacement port 40 under the elastic force of the first spring 42 to complete the fixation, and then close the filter cover 2 again to resume use.

[0030] refer to Figure 5 and Figure 9 As shown, when the secondary filter plate 70 needs to be replaced, open the filter cover 2, press the fixing block 74, the fixing block 74 compresses the second spring 73 and retracts into the fixing groove 72 and disengages from the fixing port 71, take the old secondary filter plate 70 out of the filter box 1, put the new secondary filter plate 70 into the lower part of the inner cavity of the filter box 1, the fixing block 74 automatically inserts into the fixing port 71 under the elastic force of the second spring 73 to complete the fixing, and then close the filter cover 2 again to resume use.

[0031] After use: Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, after the fermentation batch is completed, turn off the motor 51, and the rotating rod 30 and filter plate 32 will stop rotating. Check the amount of coarse particles and impurities accumulated at the bottom of the filter box 1. If necessary, open the drain port at the bottom of the filter box 1 to clean and discharge them. Check the blockage of the primary filter plate 32 and the secondary filter plate 70. Determine whether they need to be replaced based on the usage cycle and filtration resistance. Check the sealing of the motor box 50 to ensure that the operating environment of the motor 51 is dry and clean. Check the elasticity of each spring to ensure that the replacement and fixing components can work normally when used next time. After all checks and maintenance are completed, reset all components and put the device into standby mode. It can be put into the air filtration and sterilization work of the next batch of fermentation production at any time.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A multi-stage air filtration and sterilization device for fermentation of microbial feed additives, comprising a filter box (1) and a filter cover (2), characterized in that, The filter cover (2) is located on the top of the filter box (1) and is used to seal the filter box (1). The filter box (1) is equipped with a primary filter assembly. The primary filter assembly includes a rotating rod (30). The rotating rod (30) is rotatably connected to the top of the filter cover (2). Several rotating frames (31) are fixedly connected to the surface of the rotating rod (30). A filter plate (32) is placed inside the rotating frame (31). The filter plate (32) rotates at a low speed with the rotating rod (30) and is used to capture large dust particles and coarse impurities in the air by physical interception, thereby achieving primary coarse filtration pretreatment.

2. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 1, characterized in that, The rotating frame (31) is provided with a replacement component inside. The replacement component includes a replacement port (40) and a device slot (41). The replacement port (40) is opened on both sides of the filter plate (32) and is used to cooperate with the replacement block (44) to realize the detachable fixing of the filter plate (32). The device slot (41) is opened on both sides of the inner cavity of the rotating frame (31) and is used to accommodate the first spring (42) and the replacement block (44).

3. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 2, characterized in that, A first spring (42) is fixedly connected to the opposite side of the inner cavity of the two device slots (41) to provide elastic force to push the replacement block (44) outward. A replacement block (44) that cooperates with the replacement port (40) is fixedly connected to the side of the two first springs (42) that are close to each other. The replacement block (44) is inserted into the inside of the replacement port (40) under the elastic force of the first spring (42), so that the filter plate (32) is fixed in the rotating frame (31). When the filter plate (32) needs to be replaced, press the replacement block (44) to retract it into the device slot (41) and the filter plate (32) can be taken out from the rotating frame (31).

4. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 1, characterized in that, The top of the filter cover (2) is provided with a drive assembly, which includes a motor housing (50). The motor housing (50) is fixedly connected to the top of the filter cover (2). A motor (51) is fixedly connected inside the motor housing (50). The motor (51) is used to provide rotational driving force. The end of the rotating rod (30) near the motor (51) passes through the filter cover (2) and the motor housing (50) in sequence and extends into the interior of the motor housing (50). The end of the rotating rod (30) extending into the interior of the motor housing (50) is fixedly connected to the output shaft of the motor (51). The motor (51) drives the rotating rod (30) to drive the rotating frame (31) and the filter plate (32) to rotate at low speed for primary coarse filtration.

5. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 1, characterized in that, The bottom of the inner cavity of the filter box (1) is provided with a plug-in assembly, which includes a plug-in frame (60) and a plug-in interface (61). The plug-in frame (60) is rotatably connected to the bottom of the inner cavity of the filter box (1) to support the lower end of the rotating rod (30) and provide rotation guidance. A plug-in block (62) is fixedly connected inside the plug-in frame (60). The plug-in interface (61) is opened at one end of the rotating rod (30) near the plug-in block (62). The plug-in interface (61) is inserted into the inside of the plug-in block (62) to connect the rotating rod (30) with the plug-in frame (60). Both the plug-in block (62) and the plug-in interface (61) are square. When the rotating rod (30) rotates, the square shape drives the plug-in frame (60) to rotate synchronously.

6. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 1, characterized in that, The filter box (1) is equipped with a secondary filtration assembly, which includes a secondary filter plate (70) and a fixing port (71). Several secondary filter plates (70) are located in the lower part of the inner cavity of the filter box (1). The secondary filter plates (70) are fixedly installed and do not rotate with the rotating rod (30). They are used to perform secondary deep filtration and sterilization on the air after primary coarse filtration pretreatment. Several fixing ports (71) are opened on both sides of the inner cavity of the filter box (1) and are used to cooperate with the fixing block (74) to achieve the fixed installation of the secondary filter plates (70).

7. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 6, characterized in that, The secondary filter plate (70) has a fixing groove (72) on both sides to accommodate the second spring (73) and the fixing block (74). The two fixing grooves (72) are fixedly connected to the side of the cavity that is close to each other, and the second spring (73) is used to provide elastic force to push the fixing block (74) outward. The two second springs (73) are fixedly connected to the side of the cavity that is opposite to each other. The fixing block (74) is inserted into the fixing port (71) under the elastic force of the second spring (73), so that the secondary filter plate (70) is fixed in the lower part of the cavity of the filter box (1). When the secondary filter plate (70) needs to be replaced, press the fixing block (74) to retract it into the fixing groove (72) and the secondary filter plate (70) can be taken out from the filter box (1).

8. The multi-stage air filtration and sterilization device for microbial feed additive fermentation according to claim 1, characterized in that, The bottom of the filter box (1) is provided with an air outlet (80) for outputting clean air after primary coarse filtration and secondary deep filtration sterilization to the fermentation system. The top of the filter cover (2) is provided with an air inlet (81) for introducing outside air into the filter box (1). After the air enters from the air inlet (81), it first passes through the low-speed rotating filter plate (32) in the primary filtration assembly to physically intercept large particles of coarse impurities, and then passes through the fixed secondary filter plate (70) in the secondary filtration assembly for deep filtration sterilization. Finally, clean and sterile air is output from the air outlet (80).

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