Device and process for oil-liquid separation and effective substance purification of soybean fermentation liquid

Abstract

The present invention provides a device and process for oil-liquid separation and effective substance purification of soybean fermentation liquid. The replaceable filter is equipped with a filter inlet valve, a filter replacement valve, a slag discharge valve and a filter outlet valve and is connected to an air flotation mechanism. The floating tank body is equipped with a slag scraping mechanism, an overflow tank, a cooling pipeline, a cooling water inlet valve, a cooling water outlet valve, a transfer liquid one-way valve, a transfer pump outlet valve, a transfer pump and a transfer pump outlet valve. The transfer pump outlet valve is connected to the extraction process. The air flotation tank body is connected to a tubular ultrafiltration mechanism. The clear liquid outlet in the tubular ultrafiltration mechanism is connected to a sewage pool by a pipeline, and the concentrated liquid outlet is connected to the air flotation mechanism by a concentrated liquid pipe. The process is carried out according to the following steps: 1. Filtration of fermentation liquid; 2. Oil-liquid separation of fermentation liquid; 3. Purification and transportation of extraction liquid; 4. Replacement and cleaning of residual liquid in the device. The process and the device used can simultaneously complete the oil-liquid separation and effective substance purification of soybean fermentation liquid.

Description

[0001] manual Technical Field

[0002] The invention relates to the technical field of oil-liquid separation of fermented liquid and purification of effective substances, and in particular to a device and process for oil-liquid separation of soybean fermented liquid and purification of effective substances. Background Art

[0003] my country is the main producer of soybeans. Soybeans are rich in nutrients, especially protein, and the nutrients are well balanced. They are an indispensable material basis for people's lives. Fermented foods made from soybeans are delicious and have certain health functions. It is particularly important to make them for people's use. Soybean fermentation liquid contains a large number of physiologically active ingredients that exist naturally and are produced during the fermentation process.

[0004] 1. Soybean peptides: They mainly have the following functions: eliminating fatigue, reducing weight, anti-oxidation, promoting metabolism, promoting digestion and absorption, degrading sterols, strengthening muscles, lowering blood pressure, eliminating fatigue, regulating insulin, etc. In addition, soybean peptides are conducive to the growth of some microorganisms.

[0005] 2. Soy isoflavones: Soy isoflavones are now attracting much attention. They are called "phytoestrogens" and have certain female estrogen effects. They also have the physiological function of preventing prostate cancer and breast cancer. Due to this physiological function, the development and research of soy isoflavones has become the focus of health foods.

[0006] 3. Brown pigments: The brown pigments in soy sauce and bean paste are mainly melanin, which is produced by the Maillard reaction. Melanin has many physiological functions, such as improving sugar tolerance, inhibiting the formation of nitrosamines, resisting mutagenicity, inhibiting ACE activity, eliminating active oxygen, and combining with minerals.

[0007] 4. Functional oligosaccharides: There are many studies on oligosaccharides in the existing technology. They can improve the human digestive system, reduce toxic products, lower blood cholesterol and blood pressure, enhance human immunity and delay aging and other physiological functions. These functions are recognized by consumers and have formed a large market in China.

[0008] The existing methods usually adopt the method of mechanical filtration after standing, which has a long filtration cycle, large waste, and incomplete oil-liquid separation. In addition, if a filter press is used for filtration, the effective components of the soybean fermentation liquid will be attached to the filter cloth in large quantities, causing unnecessary waste. Since the soybean fermentation liquid has complex components and is rich in oil, it is particularly important to quickly separate the oil and remove water to purify the effective substances. Summary of the invention

[0009] The purpose of the present invention is to provide a device and process for oil-liquid separation and effective substance purification of soybean fermentation liquid. The technical problems to be solved by the present invention are: 1. Filtering soybean fermentation liquid through a replaceable filter to remove large particle impurities and then separating oil from liquid; 2. Transporting the concentrated liquid to the subsequent extraction process through a tubular ultrafiltration system.

[0010] The design concept of the present invention is to use a set of devices to simultaneously complete the oil-liquid separation of soybean fermentation liquid and the extraction and transportation of soybean effective substance extract. After the soybean is pre-treated with enzymatic hydrolysis and fermentation, the fermentation liquid is sent to the device of this system. The fermentation liquid is first filtered out of large particle impurities through a replaceable filter, and the fermentation liquid continues to enter the flotation mechanism for treatment. The nano-dissolved air flotation machine continuously feeds nano-scale microbubbles. Under the action of flotation, the oil phase of the fermentation liquid floats on the flotation device with larger particle size aggregates, which are skimmed off under the action of a special scraping device. The skimmed oil is collected and directly transported to the extraction tank for purification of effective substances.

[0011] The fermented liquid after flotation is transported to the tubular ultrafiltration mechanism, and the ultrafiltration membrane separates the liquid through the large-flow cross-flow filtration principle. The clear liquid produced after separation is collected and discharged into the sewage station. The separation process of the tubular ultrafiltration mechanism uses the reflux method to return the concentrated liquid to the flotation mechanism for continuous concentration until the water content in the fermented liquid is ≥50-60%, that is, the water content in the concentrated liquid is ≤40-50%. The concentrated liquid becomes a qualified soybean effective substance extract, and is then transported to the subsequent extraction process through a transfer pump for purification of effective substances.

[0012] After each batch of liquid is processed, the fermentation liquid in the replaceable filter is replaced with methanol, and finally the entire device is cleaned with pure water.

[0013] To achieve the above object, the technical solution of the present invention is:

[0014] A device for separating oil from soybean fermented liquid and purifying effective substances, comprising: a replaceable filter, an air flotation mechanism, a tubular ultrafiltration mechanism, a filter inlet valve, a filter outlet valve, a filter replacement valve, a slag discharge valve, a nano dissolved air flotation machine, an air flotation tank, a slag scraping mechanism, an overflow tank, a cooling pipeline, a cooling water inlet valve, a cooling water outlet valve, a transfer liquid one-way valve, a transfer pump inlet valve, a transfer pump, a transfer pump outlet valve, a circulation pump inlet valve, a circulation pump and a circulation pump outlet valve. In the device, a liquid inlet pipe is installed on one side of the replaceable filter, a filter inlet valve is installed on the liquid inlet pipe, a filter replacement valve is installed on the top of the replaceable filter and is connected to the replaceable filter through a pipeline, and a slag discharge valve is installed at the bottom of the replaceable filter and is connected to the replaceable filter through a pipeline. The filter is connected with the replaceable filter, and the other side of the replaceable filter is equipped with a liquid outlet pipe, the liquid outlet pipe is equipped with a filter outlet valve and is connected with the flotation mechanism, a transfer liquid one-way valve is installed at the bottom of the flotation tank in the flotation mechanism, the transfer liquid one-way valve inlet is connected with the flotation tank by a pipeline, the transfer liquid one-way valve outlet is connected with the inlet of the transfer pump inlet valve by a pipeline, the transfer pump inlet valve outlet is connected with the inlet of the transfer pump by a pipeline, the transfer pump outlet is connected with the inlet of the transfer pump by a pipeline, the transfer pump outlet is connected with the inlet of the transfer pump outlet valve by a pipeline, the transfer pump outlet valve outlet is connected with the extraction process by a pipeline, one side of the flotation tank is connected with the tubular ultrafiltration mechanism by a pipeline, the clear liquid outlet in the tubular ultrafiltration mechanism is connected with the sewage pool by a pipeline, and the concentrated liquid outlet is connected with the flotation mechanism by a concentrated liquid pipe.

[0015] The top of the flotation tank in the flotation mechanism of the device is equipped with a nanometer dissolved air flotation machine, the upper part of the flotation tank is equipped with a scraping mechanism and an overflow tank, the lower part of the flotation tank is equipped with a cooling pipeline, the cooling pipeline is respectively equipped with a cooling water inlet valve and a cooling water outlet valve, one side of the flotation tank is connected with the inlet valve of the circulation pump by a pipeline, the outlet of the inlet valve of the circulation pump is connected with the inlet of the circulation pump by a pipeline, the outlet of the circulation pump is connected with the inlet of the circulation pump by a pipeline, the outlet of the circulation pump is connected with the inlet of the circulation pump outlet valve by a pipeline, and the outlet of the circulation pump outlet valve is connected with the tubular ultrafiltration mechanism by a pipeline.

[0016] A process for oil-liquid separation and effective substance purification of soybean fermentation liquid, the process is carried out according to the following steps:

[0017] 1. Filtration of fermentation liquid: open the filter inlet valve, filter outlet valve, circulation pump inlet valve, circulation pump and circulation pump outlet valve, and a batch of fermentation liquid with a temperature of 50-70°C enters the replaceable filter through the filter inlet valve and the liquid inlet pipe. After the feeding is completed, close the filter inlet valve, and the fermentation liquid filtered by the replaceable filter enters the flotation tank of the flotation mechanism through the liquid outlet pipe and the filter outlet valve. When the large particle impurities intercepted by the replaceable filter accumulate to a certain extent, they are discharged to the external slag collection point by opening the slag discharge valve;

[0018] 2. Oil-liquid separation of fermentation liquid: After the fermentation liquid enters the flotation tank in the flotation mechanism, the nano dissolved air flotation machine continuously releases nano micro bubbles to the flotation tank. Under the action of flotation, the oil phase in the fermentation liquid is scraped off by the special scraping mechanism installed on the upper part of the flotation tank and sent to the overflow tank. The overflowed floating oil is finally transported to the extraction tank for subsequent extraction treatment. In order to ensure the temperature of the feed liquid entering the tubular ultrafiltration mechanism, circulating cooling water needs to be introduced into the flotation tank. The cooling circulating water controls the operating temperature of the feed liquid between 40-55℃. , the circulating cooling water enters the cooling pipe through the cooling water inlet valve installed at the bottom of the flotation tank for cooling circulation, and then is discharged through the cooling water outlet valve. After the feed liquid in the flotation tank is treated by flotation, it passes through the circulation pump inlet valve, and then through the circulation pump and the circulation pump outlet valve to be transported to the tubular ultrafiltration mechanism for treatment. The clear liquid produced by the ultrafiltration is transported to the sewage pool for sewage treatment. The ultrafiltration concentrate is transported to the flotation tank through the concentrate pipe for further concentration treatment. During the concentration treatment process, the transfer pump check valve, the transfer pump inlet valve, the transfer pump and the transfer pump outlet valve are in a closed state;

[0019] 3. Purification and transportation of the extract; the separation process of the tubular ultrafiltration mechanism is carried out by reflux, and the concentrate is refluxed to the flotation tank through the concentrate pipe, and continuously circulated and concentrated until the water content in the fermentation liquid is ≥50-60%, that is, the water content in the concentrate is ≤40-50%, and the concentrate becomes a qualified soybean effective substance extract. At this time, the transfer pump check valve, transfer pump inlet valve, transfer pump and transfer pump outlet valve are opened, and the feed liquid in the flotation tank passes through the transfer liquid check valve, transfer pump inlet valve, transfer pump and transfer pump outlet valve installed at the bottom of the flotation tank, and is finally transported to the extraction process for treatment to obtain the final extract;

[0020] 4. Replacement and cleaning of residual liquid in the device; after each batch of liquid is processed, the filter inlet valve and transfer liquid one-way valve are closed, and the filter replacement valve, filter outlet valve, circulation pump inlet valve, circulation pump and circulation pump outlet valve are opened at the same time. The methanol replacement liquid is injected into the replaceable filter, air flotation mechanism and tubular ultrafiltration mechanism through the filter replacement valve through the pipeline to replace the fermentation liquid residual night in the replaceable filter, air flotation mechanism and tubular ultrafiltration mechanism. Finally, the replaceable filter, air flotation mechanism and tubular ultrafiltration mechanism are cleaned with pure water. After cleaning, the next batch of soybean fermentation liquid is processed.

[0021] The replaceable filters, flotation devices, nano dissolved air flotation machines, pipelines, pumps and valves mentioned above are all made of food-grade stainless steel to ensure that no pollutants are introduced into the soybean fermentation liquid during the separation and purification process.

[0022] Compared with the prior art, the present invention has the following positive effects:

[0023] 1. The process and the device used can simultaneously complete the oil-liquid separation and effective substance purification of soybean fermentation liquid;

[0024] 2. The device uses nano-scale microbubbles for gas-liquid separation, making the oil-liquid separation of the fermentation liquid more thorough;

[0025] 3. The device adopts tubular ultrafiltration mechanism to purify and dehydrate effective substances, which is more convenient and quick, simple to operate and easy to manage;

[0026] 4. The equipment, pipelines and valves in the device are all made of food-grade stainless steel, and no pollutants will be introduced during the separation and purification process;

[0027] 5. The process and the equipment used have a high degree of automation, and the process parameters are easy to control, which is conducive to the promotion and application of the soybean deep processing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 :Flow chart of the device process for oil-liquid separation and effective substance purification of soybean fermentation liquid;

[0029] Figure 2 : Schematic diagram of replaceable filter structure;

[0030] Figure 3 : Schematic diagram of the air flotation mechanism structure;

[0031] Figure 4 : Schematic diagram of the ultrafiltration mechanism structure.

[0032] In the figure: 1. replaceable filter, 2. flotation mechanism, 3. tubular ultrafiltration mechanism, 4. filter inlet valve, 5. filter outlet valve, 6. filter replacement valve, 7. slag discharge valve, 8. nano dissolved air flotation machine, 9. flotation tank, 10. special scraping mechanism, 11. overflow tank, 12. cooling pipeline, 13. cooling water inlet valve, 14. cooling water outlet valve, 15. transfer liquid one-way valve, 16. transfer pump inlet valve, 17. transfer pump, 18. transfer pump outlet valve, 19. circulating pump inlet valve, 20. circulating pump, 21. circulating pump outlet valve, 22. concentrate pipe, 23. liquid inlet pipe, 24. liquid outlet pipe. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described clearly and completely below in conjunction with the accompanying drawings and embodiments.

[0034] Reference Figures 1 to 4In the device, a liquid inlet pipe 23 is installed on one side of the replaceable filter 1, and a filter inlet valve 4 is installed on the liquid inlet pipe 23. A filter replacement valve 6 is installed on the top of the replaceable filter 1 and is connected to the replaceable filter 1 through a pipeline. A slag discharge valve 7 is installed at the bottom of the replaceable filter 1 and is connected to the replaceable filter 1 through a pipeline. A liquid outlet pipe 24 is installed on the other side of the replaceable filter 1, and a filter outlet valve 5 is installed on the liquid outlet pipe 24 and is connected to the air flotation mechanism 2. A transfer liquid one-way valve 15 is installed at the bottom of the air flotation tank 9 in the air flotation mechanism 2. The transfer liquid one-way valve 15 inlet It is connected to the flotation tank body 9 by a pipeline, the outlet of the transfer liquid one-way valve 15 is connected to the inlet of the transfer pump inlet valve 16 by a pipeline, the outlet of the transfer pump inlet valve 16 is connected to the inlet of the transfer pump 17 by a pipeline, the outlet of the transfer pump 17 is connected to the inlet of the transfer pump outlet valve 18 by a pipeline, the outlet of the transfer pump outlet valve 18 is connected to the extraction process by a pipeline, one side of the flotation tank body 9 is connected to the tubular ultrafiltration mechanism 3 by a pipeline, the clear liquid outlet in the tubular ultrafiltration mechanism 3 is connected to the sewage pool by a pipeline, and the concentrate outlet is connected to the flotation mechanism 2 by a concentrate pipe 22.

[0035] The top of the flotation tank 9 in the flotation mechanism 2 of the device is equipped with a nanometer dissolved air flotation machine 8, the upper part of the flotation tank 9 is equipped with a scraping mechanism 10 and an overflow tank 11, the lower part of the flotation tank 9 is equipped with a cooling pipeline 12, and the cooling pipeline 12 is respectively equipped with a cooling water inlet valve 13 and a cooling water outlet valve 14, one side of the flotation tank 9 is connected with a circulation pump inlet valve 19 by a pipeline, the outlet of the circulation pump inlet valve 19 is connected with the inlet of the circulation pump 20 by a pipeline, the outlet of the circulation pump 20 is connected with the inlet of the circulation pump outlet valve 21 by a pipeline, and the outlet of the circulation pump outlet valve 21 is connected with the tubular ultrafiltration mechanism 3 by a pipeline.

[0036] During operation, the process of oil-liquid separation and effective substance purification of soybean fermentation liquid is carried out according to the following operating steps:

[0037] 1. Filtration of fermentation liquid: open the filter inlet valve 4, the filter outlet valve 5, the circulation pump inlet valve 19, the circulation pump 20 and the circulation pump outlet valve 21, and a batch of fermentation liquid with a temperature of 50-70°C enters the replaceable filter 1 through the filter inlet valve 4 and the liquid inlet pipe 23. After the feeding is completed, the filter inlet valve 4 is closed, and the fermentation liquid filtered by the replaceable filter 1 enters the flotation tank 9 of the flotation mechanism 2 through the liquid outlet pipe 24 and the filter outlet valve 5. After the large particle impurities intercepted by the replaceable filter 1 accumulate to a certain extent, they are discharged to the external slag collection point by opening the slag discharge valve 7.

[0038] 2. Oil-liquid separation of fermentation liquid: After the fermentation liquid enters the flotation tank 9 in the flotation mechanism 2, the nano dissolved air flotation machine 8 continuously releases nano micro bubbles to the flotation tank 9. The flotation mechanism 2 is a nano micro bubble flotation tank. Under the action of flotation, the oil phase in the fermentation liquid passes through the special scraping mechanism 10 installed on the upper part of the flotation tank 9, and the floating oil is scraped out and sent to the overflow tank 11. The overflowed floating oil is finally transported to the extraction tank for subsequent extraction treatment; in order to ensure the temperature of the feed liquid entering the tubular ultrafiltration mechanism, circulating cooling water is required to be introduced into the flotation tank 9. The cooling circulating water controls the operating temperature of the feed liquid between 40-55°C. The circulating cooling water is used to control the operating temperature of the feed liquid between 40-55°C. The cooling water enters the cooling pipe 12 through the cooling water inlet valve 13 installed at the bottom of the flotation tank 9 for cooling circulation, and is then discharged through the cooling water outlet valve 14. After the flotation treatment, the feed liquid in the flotation tank 9 is transported to the tubular ultrafiltration mechanism 3 through the circulation pump inlet valve 19, and then through the circulation pump 20 and the circulation pump outlet valve 21 for treatment. After the ultrafiltration treatment, the clear liquid produced by the ultrafiltration is transported to the sewage pool for sewage treatment, and the ultrafiltration concentrate is transported to the flotation tank 9 through the concentrate pipe 22 for further concentration treatment. During the concentration treatment process, the transfer liquid one-way valve 15, the transfer pump inlet valve 16, the transfer pump 17 and the transfer pump outlet valve 18 are in a closed state.

[0039] 3. Extraction and transportation of the extract: The separation process of the tubular ultrafiltration mechanism 3 is carried out by reflux, and the concentrated liquid is refluxed to the flotation tank 9 through the concentrate pipe 22 for continuous circulation and concentration until the water content in the fermentation liquid is discharged ≥50-60%, that is, the water content in the concentrated liquid is ≤40-50%, and the concentrated liquid becomes a qualified soybean effective substance extract. At this time, the transfer liquid one-way valve 15, the transfer pump inlet valve 16, the transfer pump 17 and the transfer pump outlet valve 18 are opened, and the feed liquid in the flotation tank 9 passes through the transfer liquid one-way valve 15, the transfer pump inlet valve 16, the transfer pump 17 and the transfer pump outlet valve 18 installed at the bottom of the flotation tank 9, and is finally transported to the extraction process for treatment to obtain the final extract.

[0040] 4. Replacement and cleaning of residual liquid in the device: After each batch of feed liquid is processed, the filter inlet valve 4 and the transfer liquid one-way valve 15 are closed, and the filter replacement valve 6, the filter outlet valve 5, the circulation pump inlet valve 19, the circulation pump 20 and the circulation pump outlet valve 21 are opened. The methanol replacement liquid is injected into the replaceable filter 1, the air flotation mechanism 2 and the tubular ultrafiltration mechanism 3 through the filter replacement valve 6 by a pipeline to replace the fermentation liquid residual night in the replaceable filter 1, the air flotation mechanism 2 and the tubular ultrafiltration mechanism 3. Finally, the replaceable filter 1, the air flotation mechanism 2 and the tubular ultrafiltration mechanism 3 are cleaned with pure water. After cleaning, the next batch of soybean fermentation liquid is processed.

[0041] Example detection results

[0042] Serial number name Fermentation broth content (%) Extract content (%) 1 Soybean peptides About 2.5 3-5 2 Soy Isoflavones About 0.3-0.6 0.6-1.2 3 Fat 10-15 0.5-1

[0043] All features disclosed in this specification, or the combination and connection relationship of all disclosed mechanisms, and the steps of the processing process, except for mutually exclusive features and / or steps, can be combined in any way. Any feature disclosed in this specification (including claims and abstract), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is just an example of a series of equivalent or similar features.

[0044] The above is only a non-limiting implementation mode of the present invention, and a large number of embodiments can be derived. For ordinary technicians in this field, without departing from the creative concept of the present invention and without making creative work, several modified and improved embodiments can be made, which all fall within the protection scope of the present invention.

Claims

1. A device for separating oil from soybean fermented liquid and purifying effective substances, comprising: A replaceable filter (1), an air flotation mechanism (2), a tubular ultrafiltration mechanism (3), a filter inlet valve (4), a filter outlet valve (5), a filter replacement valve (6), a slag discharge valve (7), a nano dissolved air flotation machine (8), an air flotation tank (9), a slag scraping mechanism (10), an overflow tank (11), a cooling pipeline (12), a cooling water inlet valve (13), a cooling water outlet valve (14), a transfer liquid one-way valve (15), a transfer pump inlet valve (16), a transfer pump (17), a transfer pump outlet valve (18), a circulation pump inlet valve (19), a circulation pump (20) and a circulation pump outlet valve (21), characterized in that: in the device, a liquid inlet pipe (23) is provided on one side of the replaceable filter (1), a filter inlet valve (4) is provided on the liquid inlet pipe (23), a filter replacement valve (6) is provided on the top of the replaceable filter (1) and is connected to the replaceable filter (1) by a pipeline, a slag discharge valve (7) is provided on the bottom of the replaceable filter (1) and is connected to the replaceable filter (1) by a pipeline The replaceable filter (1) is connected to the air flotation mechanism (2). The other side of the replaceable filter (1) is provided with a liquid outlet pipe (24). The liquid outlet pipe (24) is provided with a filter outlet valve (5) and is connected to the air flotation mechanism (2). The bottom of the air flotation tank (9) in the air flotation mechanism (2) is provided with a transfer liquid check valve (15). The inlet of the transfer liquid check valve (15) is connected to the air flotation tank (9) by a pipeline. The outlet of the transfer liquid check valve (15) is connected to the inlet of the transfer pump inlet valve (16) by a pipeline. The outlet of the pump inlet valve (16) is connected to the inlet of the transfer pump (17) through a pipeline, the outlet of the transfer pump (17) is connected to the inlet of the transfer pump outlet valve (18) through a pipeline, the outlet of the transfer pump outlet valve (18) is connected to the extraction process through a pipeline, one side of the flotation tank (9) is connected to the tubular ultrafiltration mechanism (3) through a pipeline, the clear liquid outlet in the tubular ultrafiltration mechanism (3) is connected to the sewage pool through a pipeline, and the concentrated liquid outlet is connected to the flotation mechanism (2) through a concentrated liquid pipe (22).

2. The device for oil-liquid separation and effective substance purification of soybean fermentation liquid according to claim 1, characterized in that: The top of the air flotation tank (9) in the air flotation mechanism (2) of the device is provided with a nanometer dissolved air flotation machine (8), the upper part of the air flotation tank (9) is provided with a scraping mechanism (10) and an overflow tank (11), the lower part of the air flotation tank (9) is provided with a cooling pipeline (12), the cooling pipeline (12) is provided with a cooling water inlet valve (13) and a cooling water outlet valve (14), one side of the air flotation tank (9) is connected with a circulation pump inlet valve (19) by a pipeline, the outlet of the circulation pump inlet valve (19) is connected with an inlet of a circulation pump (20) by a pipeline, the outlet of the circulation pump (20) is connected with an inlet of a circulation pump outlet valve (21) by a pipeline, and the outlet of the circulation pump outlet valve (21) is connected with a tubular ultrafiltration mechanism (3) by a pipeline.

3. A process for oil-liquid separation and effective substance purification of soybean fermentation liquid, characterized in that: The process is carried out according to the following steps: (1), filtering the fermentation liquid; opening the filter inlet valve (4), the filter outlet valve (5), the circulation pump inlet valve (19), the circulation pump (20) and the circulation pump outlet valve (21); a batch of fermentation liquid with a temperature of 50-70° C. enters the replaceable filter (1) through the filter inlet valve (4) and the liquid inlet pipe (23); after the feeding is completed, the filter inlet valve (4) is closed; the fermentation liquid filtered by the replaceable filter (1) enters the flotation tank (9) of the flotation mechanism (2) through the liquid outlet pipe (24) and the filter outlet valve (5); after the large particle impurities intercepted by the replaceable filter (1) accumulate to a certain extent, they are discharged to the external slag collection point by opening the slag discharge valve (7); (2) separation of oil and liquid from the fermentation liquid; after the fermentation liquid enters the flotation tank (9) in the flotation mechanism (2), the nano dissolved air flotation machine (8) continuously releases nano micro bubbles to the flotation tank (9). Under the action of flotation, the oil phase in the fermentation liquid is scraped off by a special scraping mechanism (10) installed on the upper part of the flotation tank (9) and then sent to the overflow tank (11). The overflowed floating oil is finally sent to the extraction tank for subsequent extraction treatment. In order to ensure the temperature of the feed liquid entering the tubular ultrafiltration mechanism, circulating cooling water needs to be introduced into the flotation tank (9). The cooling circulating water controls the operating temperature of the feed liquid to be between 40 and 55°C. The circulating cooling water is passed through the air flotation tank. (9) The cooling water inlet valve (13) at the bottom enters the cooling pipe (12) for cooling circulation, and then is discharged through the cooling water outlet valve (14). After the flotation treatment, the feed liquid in the flotation tank (9) passes through the circulation pump inlet valve (19), and then passes through the circulation pump (20) and the circulation pump outlet valve (21) to be transported to the tubular ultrafiltration mechanism (3) for treatment. The clear liquid produced by the ultrafiltration is transported to the sewage pool for sewage treatment. The ultrafiltration concentrate is transported to the flotation tank (9) through the concentrate pipe (22) for further concentration treatment. During the concentration treatment process, the transfer liquid one-way valve (15), the transfer pump inlet valve (16), the transfer pump (17) and the transfer pump outlet valve (18) are in a closed state; (3) Purification and transportation of the extract; the separation process of the tubular ultrafiltration mechanism (3) is carried out by reflux, and the concentrated liquid is refluxed to the flotation tank (9) through the concentrated liquid pipe (22) for continuous circulation and concentration until the water content in the fermentation liquid is discharged ≥50-60%, that is, the water content in the concentrated liquid is ≤40-50%, and the concentrated liquid becomes a qualified soybean effective substance extract. At this time, the transfer liquid one-way valve (15), the transfer pump inlet valve (16), the transfer pump (17) and the transfer pump outlet valve (18) are opened, and the feed liquid in the flotation tank (9) passes through the transfer liquid one-way valve (15), the transfer pump inlet valve (16), the transfer pump (17) and the transfer pump outlet valve (18) installed at the bottom of the flotation tank (9), and is finally transported to the extraction process for treatment to obtain the final extract; (4) Residual liquid in the device is replaced and cleaned; after each batch of liquid is processed, the filter inlet valve (4) and the transfer liquid one-way valve (15) are closed, and at the same time, the filter replacement valve (6), the filter outlet valve (5), the circulation pump inlet valve (19), the circulation pump (20) and the circulation pump outlet valve (21) are opened, and the methanol replacement liquid is injected into the replaceable filter (1), the air flotation mechanism (2) and the tubular ultrafiltration mechanism (3) through the filter replacement valve (6) to replace the residual fermentation liquid in the replaceable filter (1), the air flotation mechanism (2) and the tubular ultrafiltration mechanism (3), and finally the replaceable filter (1), the air flotation mechanism (2) and the tubular ultrafiltration mechanism (3) are cleaned with pure water. After cleaning, the next batch of soybean fermentation liquid is processed.

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