Microbial additive fermentation air multi-stage filtration and sterilization device

Abstract

The present invention provides a multi-stage air filtration and sterilization device for microbial additive fermentation, which relates to the technical field of microbial additive fermentation equipment. It includes a fermentation tank, an air processor, and an antifoamer. The air processor includes a primary filtration chamber, a secondary filtration chamber, a sterilization chamber, and a water absorption chamber that are connected in sequence. The primary filtration chamber is connected to a heater through a high-temperature air inlet pipe. The antifoamer includes an antifoamer housing and a partition cylinder that are connected to the inside of the fermentation tank. A number of water passing holes are provided on the side wall of the partition cylinder. An air suction turbine and a number of shear blades are rotatably installed inside the partition cylinder. The liquid collection chamber outside the partition cylinder is connected to the inside of the fermentation tank through a fermentation liquid return pipe. The present invention realizes multi-stage air filtration and sterilization, solves the problem of adverse effects on microbial additive fermentation caused by residual bacteria in the air, and at the same time adopts a mechanical foam-pushing and defoaming structure to accelerate the defoaming efficiency on the premise of ensuring that the microbial metabolism is not disturbed.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial additive fermentation equipment, and in particular to a multi-stage air filtration and sterilization device for microbial additive fermentation air. Background Art

[0002] Microbial additives play a very important role in feed, with functions such as improving the body's immunity, stabilizing the balance of the intestinal flora, improving feed utilization rate, and preventing and treating some digestive tract diseases. Moreover, compared with antibiotics, microbial additives that are non-toxic, harmless, and pollution-free have a broader application prospect. Microbial additives are prepared by fermentation. In order to ensure the normal and stable fermentation of microbial additives in the fermentation tank, it is necessary to regularly replace the fermentation air in the fermentation tank and ensure the sterility of the fermentation air introduced into the fermentation tank.

[0003] The existing microbial additive fermentation mainly has the following problems: First, bacteria in the air cannot be completely removed, resulting in the bacteria contained in the air may affect the normal fermentation of microbial additives and affect the finished product quality of microbial additives; Second, when a large amount of sterile air is introduced into the fermentation tank, the fermentation broth will produce foam. Currently, the most commonly used defoaming method is to add a defoaming agent, and the use of the defoaming agent is likely to interfere with the metabolism of microorganisms and affect biosynthesis.

[0004] Therefore, a multi-stage air filtration and sterilization device for microbial additive fermentation that can solve the above problems is needed. Summary of the Invention

[0005] The present invention provides a multi-stage air filtration and sterilization device for microbial additive fermentation, which realizes multi-stage air filtration and sterilization, solves the problem of adverse effects on microbial additive fermentation caused by residual bacteria in the air, and at the same time adopts a mechanical foam-pushing and defoaming structure to accelerate the defoaming efficiency on the premise of ensuring that the metabolism of microorganisms is not interfered.

[0006] The technical solution of the present invention is realized as follows:

[0007] A multi-stage air filtration and sterilization device for microbial additive fermentation, comprising a fermentation tank, the fermentation tank is connected to an air processor for multi-stage air filtration and sterilization, a two-way stirring and foam-pushing mechanism is arranged inside the fermentation tank, and a defoamer for eliminating foam is installed at the upper end of the fermentation tank;

[0008] The air processor includes a processor housing, and inside the processor housing, there are a primary filtration chamber, a secondary filtration chamber, a sterilization chamber, and a water absorption chamber that are connected in sequence. The primary filtration chamber is connected to an air compressor through a high-temperature air inlet pipe, and a heater is installed on the high-temperature air inlet pipe. The water absorption chamber is connected to the inside of the fermentation tank through a fermentation inlet pipe;

[0009] The defoamer includes a defoamer housing fixed to the side wall of the fermentation tank. Inside the defoamer housing, a partition cylinder is fixedly installed. The inside of the fermentation tank is connected to the inside of the partition cylinder through a foam outlet pipe. There are several water through holes on the side wall of the partition cylinder. An air suction turbine and several shear blades are rotatably installed inside the partition cylinder. A liquid collection chamber is formed between the outer wall of the partition cylinder and the defoamer housing. The liquid collection chamber is connected to the inside of the fermentation tank through a fermentation liquid return pipe. An exhaust valve is installed on the side wall of the defoamer housing.

[0010] As a preferred technical solution, a vertically arranged coarse filter mesh cylinder is installed inside the primary filtration chamber. The high-temperature air inlet pipe is connected to the outer space of the coarse filter mesh cylinder. A vertically arranged fine filter mesh cylinder is installed inside the secondary filtration chamber. The inner space of the coarse filter mesh cylinder is connected to the outer space of the fine filter mesh cylinder. The inner space of the fine filter mesh cylinder is connected to the sterilization chamber through a ventilation pipe.

[0011] As a preferred technical solution, several layer plates are sequentially arranged from bottom to top inside the sterilization chamber. There are several ventilation holes on each layer plate. A downflow baffle is jointly fixed between the free end of each layer plate and the adjacent lower layer plate. A downflow channel is formed between each downflow baffle and the side wall of the sterilization chamber. Every two adjacent downflow channels are arranged in a staggered manner. The upper end of each downflow baffle is higher than the top of the corresponding layer plate. A communication opening is formed between the lower end of each downflow baffle and the corresponding layer plate. The acidic solution sequentially passes through each layer plate and downflow channel along an S-shaped route.

[0012] As a preferred technical solution, a jet pipe rack is arranged below the lowermost layer plate. The jet pipe rack is connected to the ventilation pipe. A waste liquid outlet pipe is installed on the side wall at the lower end of the sterilization chamber. A liquid supplement pipe is installed on the side wall at the upper end of the sterilization chamber.

[0013] As a preferred technical solution, the inside of the water absorption chamber is divided into several water absorption layers that are sequentially arranged from bottom to top by partition plates. Each water absorption layer is filled with alkaline water absorption filler. A partition net is fixed on each partition plate and the bottom wall of the water absorption chamber. Every two adjacent partition nets are arranged in a staggered manner. The uppermost water absorption layer is connected to the intake end of the fermentation inlet pipe.

[0014] As a preferred technical solution, the bidirectional stirring and foam pushing mechanism includes a stirring shaft installed in the fermentation tank along a vertical direction, a plurality of stirring blades are fixedly installed on the lower end of the stirring shaft, a rotating sleeve is provided on the upper end of the stirring shaft, a plurality of scraping and foam pushing plates are evenly fixed on the outer wall of the rotating sleeve, and the stirring shaft and the rotating sleeve are commonly connected to a coaxial bidirectional rotation drive assembly.

[0015] As a preferred technical solution, the coarse filter mesh cylinder and the fine filter mesh cylinder are both fixed with a coaxially arranged first barrier cylinder and a second barrier cylinder, each of the first barrier cylinders has a first opening on the side wall at the lower end, and each of the second barrier cylinders has a second opening on the side wall at the upper end.

[0016] As a preferred technical solution, a row of foam pipes is connected to the interior of the partition tube, and a row of foam pumps is installed on the foam pipes.

[0017] As a preferred technical solution, the coaxial bidirectional rotation drive assembly includes a first drive motor fixed to the top of the fermentation tank, the motor shaft of the first drive motor is transmission-connected to the stirring shaft, a driving bevel gear is fixedly mounted on the stirring shaft, a driven bevel gear is fixedly mounted on the rotating sleeve, the rotating sleeve is rotatably mounted on a mounting frame, the mounting frame is fixed on the top wall of the fermentation tank, an intermediate bevel gear is rotatably mounted on the mounting frame, and the driving bevel gear and the driven bevel gear are both meshed with the intermediate bevel gear.

[0018] As a preferred technical solution, the suction turbine and the shearing blade are fixedly mounted on a rotating shaft, the rotating shaft is transmission-connected to a second driving motor, and a fermentation liquid reflux pump is installed on the fermentation liquid reflux pipe.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] Since the multi-stage filtration and sterilization device for fermentation air with microbial additives includes an air handler, the air handler includes an air compressor, a heater, a primary filter chamber, a secondary filter chamber, a sterilization chamber and a water absorption chamber. In the present invention, the air compressed by the air compressor enters the heater for high-temperature heating, and the microorganisms are dry-heat sterilized by thermal sterilization. At the same time, the high-temperature air passes through the primary filter chamber and the secondary filter chamber in turn to complete the primary sterilization and two-stage filtration and dust removal treatment of the air. After that, the air with lowered temperature enters the sterilization chamber for the second sterilization. The air that has undergone the two-stage sterilization treatment can completely remove the bacteria. Finally, the air carrying acidic water vapor enters the water absorption chamber for dehydration, and finally dry and sterile air is obtained.

[0021] Compared with traditional air processors, the present invention achieves two-stage air filtration and two-stage disinfection. The arrangement of the primary filtration chamber and the secondary filtration chamber completely removes dust particles contained in the air. At the same time, high-temperature disinfection and chemical disinfection are used in combination to completely eliminate bacteria in the air, thus solving the problem of adverse effects on the fermentation of microbial additives caused by residual bacteria in the air. Moreover, high-temperature disinfection of the air can be completed during the two-stage air filtration process, thereby improving the air filtration and disinfection efficiency of the present invention.

[0022] Since the defoamer includes a defoamer housing, a separator tube, an air suction turbine, shearing blades, and a fermentation liquid return pipe, in the present invention, the air suction turbine rotates at a high speed and generates a huge suction force inside the defoamer housing to suck the foam generated inside the fermentation tank into the separator tube. The shearing blades rotate at a high speed and generate a shearing force on the foam, tearing the foam and realizing gas-liquid separation. The separated liquid is thrown towards the side wall of the separator tube under the action of centrifugal force and enters the liquid collection chamber outside the separator tube through the water passing holes on the separator tube, and finally returns to the fermentation tank through the fermentation liquid return pipe. The mechanical defoaming structure not only realizes the rapid elimination of foam on the premise of avoiding interference with microbial metabolism by chemical defoamers, but also can return the separated fermentation liquid after defoaming back to the fermentation tank, avoiding the loss of fermentation liquid.

[0023] Since a coarse filter mesh cylinder is installed in the primary filtration chamber and a fine filter mesh cylinder is installed in the secondary filtration chamber, in the present invention, the coarse filter mesh cylinder is used to filter out large particle impurities and dust in the air, and the fine filter mesh cylinder is used to filter out small particle impurities and dust in the air. The setting of the two-stage filtration structure extends the available time of the filter mesh cylinder, improves the efficiency of the filtration work, and also extends the time of high-temperature disinfection, so that the disinfection effect of the present invention on the air is more thorough, thereby ensuring the normal fermentation of microbial additives and improving the quality of the fermented products of microbial additives.

[0024] Since a scraping and pushing foam mechanism is arranged inside the fermentation tank, in the present invention, the rotation direction of the scraping and pushing foam plate in the scraping and pushing foam mechanism is opposite to that of the stirring blades in the fermentation tank. The stirring blades stir the fermentation liquid to fully mix it with sterile air. During this process, foam will continuously form on the surface of the fermentation liquid. The reversely rotating scraping and pushing foam plate pushes the foam and continuously pushes the foam to the position where the defoamer is located, and the defoamer is used to suck in, eliminate, and return the foam. The scraping and pushing foam mechanism not only speeds up the defoaming work of the defoamer and avoids the situation where the foam attached to the inner wall of the fermentation tank cannot be eliminated, but also the stirring blades and the scraping and pushing foam plate rotate in opposite directions, which can scrape the surface of the fermentation liquid clean to the greatest extent to ensure the full contact between air and fermentation liquid.

[0025] Since there are several laminates and downflow channels inside the sterilization chamber, in the present invention, the positions of the laminates and the downflow channels form an S-shaped flow path for the acidic solution. The acidic solution sequentially passes through each laminate and downflow channel from top to bottom along the S shape, and finally converges at the bottom of the sterilization chamber. At the same time, the filtered air is first introduced into the lower space inside the sterilization chamber and sequentially passes through each laminate from bottom to top, enabling the air and the acidic solution to move in the reverse direction, thereby increasing the contact time between the air and the acidic solution, ensuring the complete removal of residual bacteria in the air by the acidic solution, and further avoiding the occurrence of adverse effects on the fermentation of the microbial additive due to residual bacteria in the air.

[0026] Since the inside of the water absorption chamber is divided into several water absorption layers by partition plates, a separation net is fixed on each partition plate and the bottom wall of the water absorption chamber, and every two adjacent separation nets are arranged in a staggered manner. In the present invention, the air carrying acidic water vapor particles passes through each water absorption layer in an S-shaped route from bottom to top, and the alkaline water absorption filler in the water absorption layer is used to absorb the acidic water vapor particles in the air, which not only realizes the dehydration and drying of the air but also avoids the occurrence of adverse effects caused by the entry of acidic water vapor into the fermentation tank. Moreover, after a long-distance flow, the temperature of the air also drops sufficiently, enabling the sterile air introduced into the fermentation tank to be within the suitable range for fermentation work, and avoiding the occurrence of adverse effects on the fermentation work due to the too high temperature of the sterile air. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is a schematic structural diagram of the air processor in the present invention;

[0030] Figure 3 is Figure 2 an enlarged structural view of part A in

[0031] Figure 4 is a schematic structural diagram of the fermentation tank in the present invention;

[0032] Figure 5 is Figure 4 a sectional view taken along the B-B direction in

[0033] Figure 6 isFigure 4 Enlarged view of the structure at position C in the figure.

[0034] Wherein: 100, fermentation tank; 101, stirring shaft; 102, stirring blade; 103, rotating sleeve; 104, scraping and foaming plate; 105, first driving motor; 106, driving bevel gear; 107, driven bevel gear; 108, mounting bracket; 109, intermediate bevel gear; 110, fermentation air inlet pipe; 111, rotating shaft; 200, air processor; 201, processor housing; 202, primary filtration chamber; 203, secondary filtration chamber; 204, sterilization chamber; 205, water absorption chamber; 206, high-temperature air inlet pipe; 207, air compressor; 208, coarse filter cartridge; 209, fine filter cartridge; 210, laminate; 211, vent hole; 212, downflow baffle; 213, downflow channel; 214, communication opening; 215, jet pipe rack; 216, ventilation pipe; 217, waste liquid outlet pipe; 218, heater; 219, liquid supply pipe; 220, partition; 221, alkaline water absorption filler; 222, partition net; 223, first barrier cylinder; 224, second barrier cylinder; 225, first opening; 226, second opening; 300, defoamer; 301, defoamer housing; 302, partition cylinder; 303, foam outlet pipe; 304, water through hole; 305, suction air turbine; 306, liquid collection chamber; 307, fermentation liquid return pipe; 308, exhaust valve; 309, second driving motor; 310, fermentation liquid return pump; 311, shear blade; 312, foam discharge pipe; 313, foam discharge pump. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] As Figures 1-5 Collectively shown, a multi-stage filtration and sterilization device for fermentation air of a microbial additive includes a fermentation tank 100, the fermentation tank 100 is connected with an air processor 200 for multi-stage filtration and sterilization of air, a two-way stirring and foaming elimination mechanism is arranged inside the fermentation tank 100, and a defoamer 300 for eliminating foam is installed at the upper end of the fermentation tank 100. In this embodiment, a mechanical foaming elimination structure is adopted, which not only avoids the interference of the microbial metabolism by chemical defoamers, but also increases the contact area between the foam and the defoamer 300, and speeds up the defoaming efficiency.

[0038] As Figure 1and Figure 2 As shown jointly, the air processor 200 includes a processor housing 201. Inside the processor housing 201, there are arranged a primary filtration chamber 202, a secondary filtration chamber 203, a sterilization chamber 204, and a water absorption chamber 205 that are connected in sequence. The primary filtration chamber 202 is connected to an air compressor 207 through a high-temperature air inlet pipe 206. A heater 218 is installed on the high-temperature air inlet pipe 206. The water absorption chamber 205 is connected to the interior of the fermentation tank 100 through a fermentation inlet pipe 110. In the present invention, a two-stage sterilization method combining high-temperature sterilization and chemical sterilization is adopted. The heater 218 is used to heat the compressed air at a high temperature, and the heated high temperature is used to perform primary sterilization on the bacteria in the air. The acidic solution in the sterilization chamber 204 is used to perform secondary sterilization on the remaining bacteria in the air, so that the bacteria contained in the air can be completely removed, avoiding the adverse effect on the normal fermentation of the microbial additive due to the remaining bacteria in the air, and thus ensuring the normal fermentation of the microbial additive.

[0039] As Figure 4 and Figure 6 As shown jointly, the defoamer 300 includes a defoamer housing 301 fixed on the side wall of the fermentation tank 100. Inside the defoamer housing 301, a partition cylinder 302 is fixedly installed. The interior of the fermentation tank 100 is connected to the interior of the partition cylinder 302 through a foam outlet pipe 303. A plurality of water through holes 304 are provided on the side wall of the partition cylinder 302. An air suction turbine 305 and a plurality of shear blades 311 are rotatably installed inside the partition cylinder 302. A liquid collection chamber 306 is formed between the outer wall of the partition cylinder 302 and the defoamer housing 301. The liquid collection chamber 306 is connected to the interior of the fermentation tank 100 through a fermentation liquid return pipe 307. An exhaust valve 308 is installed on the side wall of the defoamer housing 301. In the present invention, a mechanical defoaming structure is adopted. The shear force generated by the high-speed rotation of the shear blades 311 is used to tear the foam, separating the air and the fermentation liquid in the foam. The released fermentation liquid accumulates in the liquid collection chamber 306 and then flows back into the fermentation tank 100 through the fermentation liquid return pipe 307, avoiding the loss of the fermentation liquid.

[0040] As Figure 2As shown, a vertically arranged coarse filter mesh cylinder 208 is installed in the primary filter chamber 202. The high-temperature air inlet pipe 206 is communicated with the outer space of the coarse filter mesh cylinder 208. A vertically arranged fine filter mesh cylinder 209 is installed in the secondary filter chamber 203. The inner space of the coarse filter mesh cylinder 208 is communicated with the outer space of the fine filter mesh cylinder 209. The inner space of the fine filter mesh cylinder 209 is communicated with the sterilization chamber 204 through a ventilation pipe 216. In the present invention, the coarse filter mesh cylinder 208 and the fine filter mesh cylinder 209 are used to perform two-stage filtration on the air. The coarse filter mesh cylinder 208 filters out large particle impurities and dust contained in the air, and the fine filter mesh cylinder 209 filters out small particle impurities and dust contained in the air. The filtration method of hierarchical filtration avoids the situation that the impurity accumulation is too fast and affects the filtration efficiency.

[0041] As Figure 2 and Figure 3 Collectively shown, a plurality of laminates 210 are sequentially arranged from bottom to top inside the sterilization chamber 204. A plurality of ventilation holes 211 are provided on each laminate 210. A downflow baffle 212 is commonly fixed between the free end of each laminate 210 and the adjacent lower laminate 210. A downflow channel 213 is formed between each downflow baffle 212 and the side wall of the sterilization chamber 204. Each two adjacent downflow channels 213 are arranged in a staggered manner. The upper end of each downflow baffle 212 is higher than the top of the corresponding laminate 210. In this embodiment, the setting of the downflow baffle 212 forms an overflow weir at the liquid outlet end of the laminate 210, which can have a certain amount of acidic solution at the top of the laminate 210. When the liquid level of the acidic solution exceeds the downflow baffle 212, it can overflow into the corresponding downflow channel 213 and enter the laminate 210 of the adjacent lower layer; a communication opening 214 is formed between the lower end of each downflow baffle 212 and the corresponding laminate 210, and the acidic solution sequentially passes through each laminate 210 and the downflow channel 213 along an S-shaped route.

[0042] Among them, a jet pipe rack 215 is arranged below the lowermost laminate 210. The jet pipe rack 215 is communicated with the ventilation pipe 216. A waste liquid outlet pipe 217 is installed on the side wall at the lower end of the sterilization chamber 204, and a liquid supplement pipe 219 is installed on the side wall at the upper end of the sterilization chamber 204.

[0043] In the present invention, in the case where the shelf 210 and the downflow channel 213 are provided, an S-shaped flow path of the acidic solution is formed in the sterilization chamber 204. The replenishing pipe 219 introduces the acidic solution onto the uppermost shelf 210. Then, the acidic solution sequentially passes through each shelf 210 and the downflow channel 213 along the S-shaped path from top to bottom, and finally converges at the bottom of the sterilization chamber 204. At the same time, the filtered air is sprayed upward into the sterilization chamber 204 through the air jet pipe rack 215. The air sequentially passes through each shelf 210 from bottom to top. During this process, the upward-moving air continuously contacts and reacts with the acidic solution. The acidic solution can denature the proteins of bacteria and destroy the structure of bacteria, thereby completely removing the remaining bacteria in the air and avoiding the situation of adverse effects on the fermentation of microbial additives caused by the remaining bacteria in the air.

[0044] As Figure 2 shown, the inside of the water absorption chamber 205 is divided into a plurality of water absorption layers sequentially arranged from bottom to top by a partition plate 220. Each water absorption layer is filled with an alkaline water absorption filler 221. A partition net 222 is fixed on each partition plate 220 and the bottom wall of the water absorption chamber 205. In this embodiment, a plurality of mesh holes are uniformly arranged on the partition net 222 for passing air; every two adjacent partition nets 222 are arranged in a staggered manner. The water absorption layer located at the uppermost part is connected to the intake end of the fermentation intake pipe 110. In the present invention, the alkaline water absorption filler 221 is used to absorb the acidic water vapor in the air, which not only realizes the dehydration and drying of the air but also avoids the situation of adverse effects caused by the acidic water vapor entering the fermentation tank 100.

[0045] Embodiment 2

[0046] This embodiment is basically the same as Embodiment 1, except that:

[0047] As Figure 4 and Figure 5 collectively shown, the bidirectional stirring and foam scraping mechanism includes a stirring shaft 101 rotatably installed in the fermentation tank 100 in the vertical direction. A plurality of stirring blades 102 are fixedly installed at the lower end of the stirring shaft 101. A rotating sleeve 103 is sleeved on the upper end of the stirring shaft 101. A plurality of scraping and foam scraping plates 104 are uniformly fixed on the outer wall of the rotating sleeve 103. The stirring shaft 101 and the rotating sleeve 103 are jointly connected with a coaxial bidirectional rotation driving assembly.

[0048] As Figure 2As shown, a first barrier cylinder 223 and a second barrier cylinder 224 which are coaxially arranged are fixed inside both the coarse filter screen cylinder 208 and the fine filter screen cylinder 209. A first opening 225 is provided on the side wall at the lower end of each first barrier cylinder 223, and a second opening 226 is provided on the side wall at the upper end of each second barrier cylinder 224. In this embodiment, the first barrier cylinder 223 and the second barrier cylinder 224 serve to lengthen the air flow distance to extend the time of the air inside the coarse filter screen cylinder 208 and the fine filter screen cylinder 209, thereby extending the time for high-temperature sterilization of the air, enabling high temperature to have sufficient time to remove bacteria in the air, and thus improving the high-temperature sterilization effect on the air.

[0049] As Figure 4 and Figure 6 As shown together, a drain pipe 312 is communicated inside the separator cylinder 302, and a drain pump 313 is installed on the drain pipe 312. In this embodiment, after the defoaming work is completed, a small amount of foam and other impurities remain inside the separator cylinder 302. To avoid the influence of these residues on the fermentation work inside the fermentation tank 100, they are discharged through the drain pump 313 and the drain pipe 312.

[0050] As Figure 4 and Figure 5 As shown together, the coaxial bidirectional rotation drive assembly includes a first drive motor 105 fixed to the top of the fermentation tank 100. The motor shaft of the first drive motor 105 is in transmission connection with the stirring shaft 101. A driving bevel gear 106 is fixedly installed on the stirring shaft 101, and a driven bevel gear 107 is fixedly installed on the rotating sleeve 103. The rotating sleeve 103 is rotatably installed on a mounting frame 108, and the mounting frame 108 is fixed to the top wall of the fermentation tank 100. An intermediate bevel gear 109 is rotatably installed on the mounting frame 108. Both the driving bevel gear 106 and the driven bevel gear 107 are engaged with the intermediate bevel gear 109. As Figure 5 shown, if the direction indicated by arrow a is the rotation direction of the scraping and pushing foam plate 104, then the direction indicated by arrow b is the rotation direction of the stirring blades 102.

[0051] In the present invention, under the driving action of the driving bevel gear 106, the intermediate bevel gear 109 and the driven bevel gear 107, the stirring shaft 101 and the rotating sleeve 103 rotate in opposite directions, causing the stirring blades 102 and the scraping and pushing foam plate 104 to rotate concentrically in opposite directions. The rotating stirring blades 102 stir the fermentation broth, enabling the fermentation broth to come into full contact with sterile air. During this process, foam continuously forms on the liquid surface of the fermentation broth. The rotating scraping and pushing foam plate 104 continuously scrapes and pushes the foam on the liquid surface, exposing the fermentation broth and allowing it to continue to contact the air. Moreover, the scraping and pushing foam plate 104 is used in conjunction with the defoamer 300, which can continuously push the foam towards the position where the defoamer 300 is located. The defoamer 300 quickly sucks out the foam from the fermenter 100 and completes the defoaming operation, thereby improving the defoaming efficiency of the foam and ensuring the normal progress of the fermentation of microbial additives.

[0052] As Figure 4 and Figure 6 Collectively shown, the air suction turbine 305 and the shearing blade 311 are fixedly installed on a rotating shaft 111 together. The rotating shaft 111 is drivingly connected to a second driving motor 309. A fermentation broth reflux pump 310 is installed on the fermentation broth reflux pipe 307.

[0053] As Figure 2 and Figure 3 shown, the direction of the solid arrow represents the flow direction of air, and the direction of the dashed arrow represents the flow direction of the acidic solution. The method of using the present invention is as follows:

[0054] First step, air enters the air compressor 207 for compression. The compressed air is heated by the heater 218 to obtain high-temperature air above 200 °C. Then, the high-temperature air is introduced into the air processor 200 through the high-temperature air inlet pipe 206, and the bacteria in the air are sterilized at high temperature using the high temperature, killing most of the bacteria contained in the air.

[0055] In the second step, the high-temperature air first passes through the primary filtration chamber 202 and the secondary filtration chamber 203 in sequence. The high-temperature air in the primary filtration chamber 202 enters the coarse filter mesh cylinder 208 and passes through the outer space of the first barrier cylinder 223, the first opening 225, the outer space of the second barrier cylinder 224, the second opening 226, and the inner space of the second barrier cylinder 224 along an S-shaped route, and then enters the secondary filtration chamber 203. Similarly, the high-temperature air in the secondary filtration chamber 203 enters the fine filter mesh cylinder 209 and passes through the outer space of the first barrier cylinder 223, the first opening 225, the outer space of the second barrier cylinder 224, the second opening 226, and the inner space of the second barrier cylinder 224 along an S-shaped route, and then enters the ventilation pipe 216. The coarse filter mesh cylinder 208 filters out large particle impurities and dust in the air, causing the large particle impurities and dust to accumulate in the primary filtration chamber 202. The fine filter mesh cylinder 209 filters out small particle impurities and dust in the air, causing the small particle impurities and dust to accumulate in the secondary filtration chamber 203, thus completing the secondary filtration of the air;

[0056] In the third step, the liquid supply pipe 219 sprays the acidic solution above the topmost layer plate 210. Then, the acidic solution passes through each layer plate 210 and the downflow channel 213 from top to bottom along an S-shaped route. Finally, the acidic solution waste liquid collected at the bottom of the sterilization chamber 204 is discharged through the waste liquid outlet pipe 217. During this process, the filtered air is sprayed into the sterilization chamber 204 through the ventilation pipe 216 and the air spraying pipe rack 215. The air passes through each layer plate 210 from bottom to top through the ventilation holes 211 and contacts the acidic solution on each layer plate 210, using the acidic solution to sterilize the air, and completely removing the remaining bacteria in the air through secondary sterilization treatment;

[0057] In the fourth step, the air containing a large amount of acidic water vapor after the sterilization work enters the water absorption chamber 205. The air in the water absorption chamber 205 passes through each water absorption layer from bottom to top along an S-shaped route, and the alkaline water absorption filler 221 is used to absorb the acidic water vapor in the air, achieving acid removal and dehydration of the air and obtaining dry sterile air;

[0058] In the fifth step, the sterile air is introduced into the fermentation tank 100 through the fermentation inlet pipe 110. The first drive motor 105 drives the stirring blade 102 and the scraping foam plate 104 to rotate bidirectionally coaxially through the concentric shaft bidirectional rotation drive mechanism. The stirring blade 102 stirs the fermentation broth, enabling the fermentation broth to be fully mixed with the sterile air. A large amount of foam will be generated on the surface of the fermentation broth during the continuous mixing of the fermentation broth and the sterile air. There is relative movement between the rotating scraping foam plate 104 and the stirring blade 102, so the foam on the blade can be quickly scraped off, exposing the fermentation broth for continued contact and mixing with the sterile air;

[0059] Step 6: The second drive motor 309 drives the suction turbine 305 and the shearing blade 311 to rotate at high speed. The suction turbine 305 rotating at high speed generates a huge suction force inside the defoamer housing 301. The foam in the fermenter 100 is sucked into the partition cylinder 302. The shearing blade 311 rotating at high speed uses the shearing force to tear up the foam, separating the gas from the liquid. The released fermented liquid is immediately thrown towards the inner wall of the partition cylinder 302 by the centrifugal force, enabling it to enter the liquid collection chamber 306 through the water passing holes 304. The fermented liquid in the liquid collection chamber 306 flows back into the fermenter 100 under the action of the fermented liquid reflux pump 310 and the fermented liquid reflux pipe 307. The released gas is discharged from the defoamer housing 301 through the exhaust valve 308.

[0060] In summary, the multi-stage air filtration and sterilization device for microbial additive fermentation proposed by the present invention realizes multi-stage air filtration and sterilization, solves the problem of adverse effects on microbial additive fermentation caused by residual bacteria in the air, and at the same time adopts a mechanical foam-pushing and defoaming structure, which speeds up the defoaming efficiency on the premise of ensuring that the microbial metabolism is not disturbed.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-stage filtration and sterilization device for fermentation air with microbial additives, comprising a fermentation tank, characterized in that: The fermentation tank is connected to an air processor for multi-stage filtration and sterilization of air, a two-way stirring and foam pushing mechanism is arranged inside the fermentation tank, and a defoamer for eliminating foam is installed at the upper end of the fermentation tank; The air handler comprises a handler housing, wherein a primary filter chamber, a secondary filter chamber, a sterilization chamber and a water absorption chamber are sequentially connected to each other in the handler housing, the primary filter chamber is connected to an air compressor via a high-temperature air inlet pipe, a heater is installed on the high-temperature air inlet pipe, and the water absorption chamber is connected to the inside of the fermentation tank via a fermentation air inlet pipe; A vertically arranged coarse filter cylinder is installed in the primary filter chamber, the high-temperature air inlet pipe is connected to the outer space of the coarse filter cylinder, a vertically arranged fine filter cylinder is installed in the secondary filter chamber, the inner space of the coarse filter cylinder is connected to the outer space of the fine filter cylinder, and the inner space of the fine filter cylinder is connected to the sterilization chamber through a ventilation pipe; A plurality of layer plates are sequentially arranged from bottom to top inside the sterilization chamber, and a plurality of vent holes are arranged on each layer plate. A downflow baffle is commonly fixed between the free end of each layer plate and the adjacent lower layer plate, and a downflow channel is formed between each downflow baffle and the side wall of the sterilization chamber. Every two adjacent downflow channels are staggered, and the upper end of each downflow baffle is higher than the top of the corresponding layer plate, and a connecting opening is formed between the lower end of each downflow baffle and the corresponding layer plate, and the acidic solution sequentially passes through each layer plate and the downflow channel along an S-shaped route; An air jet pipe rack is arranged below the bottom layer plate, the air jet pipe rack is connected with the ventilation pipe, a waste liquid outlet pipe is installed on the side wall of the lower end of the sterilization chamber, and a liquid replenishment pipe is installed on the side wall of the upper end of the sterilization chamber; The interior of the water absorption chamber is divided into a plurality of water absorption layers arranged in sequence from bottom to top by a partition, each of the water absorption layers is filled with an alkaline water absorption filler, a partition net is fixed on each of the partitions and the bottom wall of the water absorption chamber, and every two adjacent partition nets are staggered, and the water absorption layer located at the top is connected to the air intake end of the fermentation air intake pipe.

2. The multi-stage filtration and sterilization device for fermentation air with microbial additives according to claim 1, characterized in that: The defoamer includes a defoamer shell fixed on the side wall of the fermenter, a partition cylinder is fixedly installed in the defoamer shell, the interior of the fermenter is connected with the interior of the partition cylinder through a foam outlet pipe, a plurality of water holes are provided on the side wall of the partition cylinder, a suction turbine and a plurality of shearing blades are rotatably installed inside the partition cylinder, a liquid collecting chamber is formed between the outer wall of the partition cylinder and the defoamer shell, the liquid collecting chamber is connected with the interior of the fermenter through a fermentation liquid reflux pipe, and an exhaust valve is installed on the side wall of the defoamer shell.

3. The microbial additive fermentation air multi-stage filtration and sterilization device according to claim 1, characterized in that: The bidirectional stirring and foam pushing mechanism includes a stirring shaft installed in the fermentation tank in a vertical direction, a plurality of stirring blades are fixedly installed on the lower end of the stirring shaft, a rotating sleeve is sleeved on the upper end of the stirring shaft, a plurality of scraping and foam pushing plates are evenly fixed on the outer wall of the rotating sleeve, and the stirring shaft and the rotating sleeve are commonly connected to a coaxial bidirectional rotation drive assembly.

4. The multi-stage filtration and sterilization device for fermentation air with microbial additives according to claim 1, characterized in that: The coarse filter mesh cylinder and the fine filter mesh cylinder are both fixed with a coaxially arranged first barrier cylinder and a second barrier cylinder. The side wall at the lower end of each of the first barrier cylinders is provided with a first opening, and the side wall at the upper end of each of the second barrier cylinders is provided with a second opening.

5. The multi-stage filtration and sterilization device for fermentation air with microbial additives according to claim 2, characterized in that: The interior of the partition cylinder is connected to a row of foam pipes, and a row of foam pumps are installed on the foam pipes.

6. The multi-stage filtration and sterilization device for fermentation air with microbial additives according to claim 3, characterized in that: The coaxial bidirectional rotation drive assembly includes a first drive motor fixed to the top of the fermenter, the motor shaft of the first drive motor is drivingly connected to the stirring shaft, a driving bevel gear is fixedly mounted on the stirring shaft, a driven bevel gear is fixedly mounted on the rotating sleeve, the rotating sleeve is rotatably mounted on a mounting frame, the mounting frame is fixed on the top wall of the fermenter, an intermediate bevel gear is rotatably mounted on the mounting frame, and the driving bevel gear and the driven bevel gear are both meshed with the intermediate bevel gear.

7. The multi-stage filtration and sterilization device for fermentation air with microbial additives according to claim 2, characterized in that: The suction turbine and the shearing blade are fixedly mounted on a rotating shaft, the rotating shaft is transmission-connected with a second driving motor, and a fermentation liquid reflux pump is installed on the fermentation liquid reflux pipe.

Images