A hydrogen-rich water-in-oil emulsion based on membrane emulsification technology and a preparation method thereof

Abstract

The application relates to the technical field of hydrogen utilization and functional nanomaterial preparation, and discloses a hydrogen-rich water-in-oil emulsion based on a membrane emulsification technology and a preparation method thereof, which solves the problems of low hydrogen concentration, easy diffusion, poor stability and single application form of existing hydrogen-rich water, and comprises a dispersed phase and a continuous phase; the dispersed phase is hydrogen-rich water; the continuous phase is a biocompatible oil phase; the dispersed phase is uniformly dispersed in the continuous phase in the form of micrometer-level droplets to form a water-in-oil structure; the initial dissolved hydrogen concentration of the hydrogen-rich water is not less than 1.5 ppm; an amphiphilic emulsifier is further added in the water-in-oil emulsion, and the emulsifier is uniformly dispersed at the interface between the oil phase and the water phase; the oil phase is selected from one or more mixtures of edible oil, mineral oil or silicone oil; the application realizes high-concentration hydrogen loading and long-acting slow release, the emulsion particle size is uniform, the storage stability is high, the preparation condition is mild, the oil phase can be recycled, and the oil phase can be widely applied to multiple fields as a basic raw material.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen utilization and functional nanomaterial preparation technology, specifically a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology and its preparation method. Background Technology

[0002] Hydrogen, as a small-molecule gas with antioxidant and anti-inflammatory biological activities, shows broad application prospects in fields such as healthcare, beauty and skincare, and agriculture, with its main application form being hydrogen-rich water. However, hydrogen has extremely low solubility in water, only about 1.6 ppm at room temperature and pressure, and it easily escapes from aqueous solutions. This results in inherent defects in hydrogen-rich water, such as low hydrogen concentration, poor stability, and short shelf life, which severely limit its industrial application.

[0003] To address the concentration issue of hydrogen-rich water, existing technologies include micro-electrolysis material preparation and PEM electrolysis combined with nano-ceramic plate treatment. However, these solutions do not fundamentally solve the core problems of hydrogen's easy escape and poor stability. Membrane emulsification technology, as a low-energy-consumption emulsion preparation technology with narrow emulsion particle size distribution, mild preparation conditions, and easy industrial scale-up, has been successfully applied in the food, pharmaceutical, and cosmetic fields. It can accurately disperse one fluid into another immiscible continuous fluid through a microporous structure, effectively controlling the particle size of the dispersed phase. However, to date, there are no related technologies for applying membrane emulsification technology to the preparation of high-concentration, high-stability hydrogen-rich water. There is a lack of hydrogen carrier technologies that can efficiently load hydrogen, achieve long-term sustained release, and adapt to diverse application scenarios, which cannot meet the market's diversified demand for hydrogen-rich functional materials. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology and its preparation method, which effectively solves the problems of low hydrogen concentration, easy dispersion, poor stability and limited application forms of existing hydrogen-rich water in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology, comprising a dispersed phase, a continuous phase, and an emulsifier, wherein the dispersed phase is hydrogen-rich water, the continuous phase is a biocompatible oil phase, and the emulsifier is an amphiphilic substance. The initial dissolved hydrogen concentration of the hydrogen-rich water is not less than 1.5 ppm, and it is uniformly dispersed in the continuous phase in the form of micron-sized droplets to form a water-in-oil core-shell structure. The emulsifier is uniformly distributed at the interface between the oil phase and the water phase, stabilizing the emulsion morphology by reducing interfacial tension.

[0006] Preferably, the oil phase is selected from one or more of edible oil, mineral oil or silicone oil, with natural plant oils such as olive oil, tea seed oil and coconut oil being preferred. The emulsifier is food grade or cosmetic grade and is selected from one or more of polyglycerol fatty acid esters, Span emulsifiers (Span 60, Span 80) and Tween emulsifiers (Tween 60, Tween 80).

[0007] Preferably, the micron-sized droplets have a particle size of 1-50 μm and a particle size variation coefficient ≤15%. Under sealed storage conditions at 25°C, the hydrogen release time of the emulsion is 2-7 days, and the hydrogen concentration retention rate after 30 days is not less than 60% of the initial concentration, with no stratification or demulsification.

[0008] A method for preparing a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology, characterized by comprising the following steps:

[0009] S1. Preparation of hydrogen-rich water: Start the water electrolysis hydrogen production equipment 1. The high-purity hydrogen gas produced is accurately introduced into the turbine chamber 4 of the mixed flow pump 3 through the ejector 2. Deionized water is introduced into the mixed flow pump 3. The water flow rotates at a high speed of 1200-1800 r / min in the turbine chamber 4, forming a strong shear mixing with the hydrogen flow. This process lasts for 3-5 minutes to achieve efficient hydrogen dissolution and produce hydrogen-rich water with an initial dissolved hydrogen concentration of not less than 1.5 ppm. The hydrogen-rich water is then transported to the hydrogen-rich water storage tank 5 and sealed for storage. The storage temperature is controlled at 20-25℃.

[0010] S2. Oil Phase Preparation: Add the preset amount of oil phase raw material to the oil phase storage tank 10, and heat the oil phase to 30-50℃ using the built-in heating device in the oil phase storage tank 10; add emulsifier at 0.5%-5% of the oil phase mass, start the stirring device, and stir at a rate of 300-800 r / min for 15-25 min until the emulsifier is completely dissolved; turn off the heating device and allow it to cool naturally to 20-25℃ to obtain a homogeneous and stable continuous oil phase for later use.

[0011] S3. Membrane Emulsification Forming: Start the temperature control system to stabilize the ambient temperature of the membrane emulsification unit at 20-25℃, ensuring that the temperature difference between the oil phase and hydrogen-rich water is ≤3℃; start the high-pressure pump 6 to pump the hydrogen-rich water in the hydrogen-rich water storage tank 5 into the dispersed phase inlet of the porous membrane tube 7 at a flow rate of 5-50mL / min, and control the pump output pressure at 0.1-0.5MPa; simultaneously start the circulation pump 9 to pump the homogeneous oil phase in the oil phase storage tank 10 at a high speed tangentially along the continuous phase outer cavity of the porous membrane tube 7 at a flow rate of 0.5-5m / s; under pressure, the hydrogen-rich water passes through the membrane pores of the porous membrane tube 7 and is instantly sheared and wrapped by the high-speed flowing oil phase to form a water-in-oil primary emulsion, which flows into the buffer circulation tank 8 along with the oil phase;

[0012] S4. Emulsion Homogenization and Degassing: Start the stirring device of the buffer circulation tank 8 and homogenize the primary emulsion at a rate of 200-500 r / min for 10-30 min to make the droplet size more uniform; transfer the homogenized emulsion to the online vacuum degassing tank 11, set the vacuum degree to -0.06~-0.09 MPa and the temperature to 20-25℃, and degas for 5-15 min; monitor the vacuum degree in the tank in real time through the vacuum degree sensor 12. When the vacuum degree exceeds the set range, the automatic pressure relief valve 13 is activated to adjust the pressure to ensure the degassing effect;

[0013] S5. Storage and Finished Product: After degassing, the emulsion is transported to the product collection tank 14. Inert gas nitrogen or argon is introduced into the product collection tank 14 to form a protective layer. The pressure inside the tank is stabilized at atmospheric pressure through the pressure balancing valve 15. The emulsion is then filled into an opaque sealed container 16 using aseptic filling equipment. After sealing, the hydrogen-rich water-in-oil emulsion product is obtained. The finished product is stored in a sealed environment at 20-25℃.

[0014] An apparatus for preparing hydrogen-rich water-in-oil emulsions using the above-mentioned method includes a hydrogen production and hydrogen-rich water preparation unit, an oil phase blending unit, a membrane emulsification unit, an emulsion treatment unit, and a storage and packaging unit. The hydrogen production and hydrogen-rich water preparation unit includes an electrolytic water hydrogen production device 1, an ejector 2, a mixed-flow pump 3, a turbine chamber 4, and a hydrogen-rich water storage tank 5. The hydrogen outlet of the electrolytic water hydrogen production device 1 is connected to the input end of the ejector 2, and the output end of the ejector 2 is connected to the inlet of the mixed-flow pump 3. The turbine chamber 4 houses the mixed-flow pump 3, and the outlet of the mixed-flow pump 3 is connected to the hydrogen-rich water storage tank 5 through a sealed pipe. The core of the oil phase blending unit is an oil phase storage tank 10, which contains an electric heating device and an anchor-type stirring paddle. The outer wall is equipped with... The insulation layer and the membrane emulsification unit consist of a high-pressure pump 6, a porous membrane tube 7, a circulation pump 9, and a temperature control system. The high-pressure pump 6 is connected in series between the hydrogen-rich water storage tank 5 and the porous membrane tube 7, and the circulation pump 9 is connected in series between the oil phase storage tank 10 and the porous membrane tube 7. The emulsion treatment unit includes a buffer circulation tank 8, an online vacuum degassing tank 11, a vacuum sensor 12, and an automatic pressure relief valve 13. The buffer circulation tank 8 is connected in sequence with the porous membrane tube 7 and the online vacuum degassing tank 11. The storage and packaging unit includes a product collection tank 14, a pressure balancing valve 15, and aseptic filling equipment. The product collection tank 14 has an opaque structure, the pressure balancing valve 15 is installed on the top of the tank, and the product collection tank 14 is connected to the aseptic filling equipment.

[0015] Preferably, the inner wall of the product collection tank 14 is provided with an inert gas inlet channel, which can quickly form an inert gas protective layer; the units are connected by sealed pipes, the inner wall of the pipes is smooth and without dead corners, reducing hydrogen escape and material residue; the porous membrane tube 7 is detachably connected by a flange, which facilitates quick replacement of membrane tubes with different pore sizes to adapt to different production needs.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) In the work, by applying membrane emulsification technology to the preparation of hydrogen-rich water-in-oil emulsion, the water-in-oil structure of the hydrogen-rich water dispersion phase and the biocompatible oil phase continuous phase is used as a physical barrier to significantly slow down the hydrogen escape rate and solve the core problem of poor stability of traditional hydrogen-rich water. Combined with the online vacuum degassing process to remove the air trapped in the emulsion, the oil phase encapsulation effect of the water phase is further optimized, so that the hydrogen concentration retention rate of the emulsion is not less than 60% after being sealed and stored at 25°C for 30 days, and the hydrogen slow release time can reach 2-7 days, realizing the long-term delivery of hydrogen.

[0018] (2) In operation, hydrogen dissolution is enhanced by high-speed shear mixing process in turbine cavity to produce hydrogen-rich water with an initial dissolved hydrogen concentration of not less than 1.5 ppm. Combined with the precise control of the dispersed phase particle size by porous membrane tube, the droplet size of hydrogen-rich water is controlled at 1-50 μm with a coefficient of variation ≤15%, and the emulsion has strong uniformity. At the same time, by adjusting the membrane pore size (0.1-10 μm), oil phase type and emulsifier ratio, the hydrogen release rate can be flexibly adjusted to meet the needs of different application scenarios such as food, cosmetics, and medicine.

[0019] (3) During the work, the preparation process is carried out under mild conditions at 20-25℃ throughout, without the need for high temperature or strong shear, which avoids the large-scale loss of hydrogen during the preparation process and ensures the bioactivity of hydrogen. The oil phase can be recycled through a circulating pump, reducing raw material consumption and production costs. The emulsifier is selected as a food-grade or cosmetic-grade product, and the oil phase is preferably selected as a natural plant oil, which has good biocompatibility, is safe and non-toxic, and is suitable for the use requirements of various end products.

[0020] (4) In the process, the hydrogen-rich water-in-oil emulsion obtained is stable in form, easy to store, transport and use. It can be flexibly added to various products such as beverages, capsules, skin care products and food additives as a basic functional raw material, breaking through the limitation of the single application form of traditional hydrogen-rich water, greatly expanding the application scenarios of hydrogen, and has significant industrialization value. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of the overall structure of the preparation device of the present invention;

[0024] Figure 2 This is a schematic diagram of the hydrogen-rich water preparation process of the present invention;

[0025] Figure 3This is a schematic diagram of the oil phase blending process of the present invention;

[0026] Figure 4 This is a schematic diagram of the membrane emulsification and molding process of the present invention;

[0027] Figure 5 This is a schematic diagram of the emulsion homogenization and degassing process of the present invention;

[0028] Figure 6 This is a schematic diagram of the storage and finished product process of the present invention;

[0029] In the diagram: 1. Electrolysis water hydrogen production equipment; 2. Ejector; 3. Mixed flow pump; 4. Turbine chamber; 5. Hydrogen-rich water storage tank; 6. High-pressure pump; 7. Porous membrane tube; 8. Buffer circulation tank; 9. Circulation pump; 10. Oil phase storage tank; 11. Online vacuum degassing tank; 12. Vacuum sensor; 13. Automatic pressure relief valve; 14. Product collection tank; 15. Pressure balancing valve; 16. Opaque sealed container. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1, by Figures 1 to 6 As given, the present invention includes... Figures 1 to 6 The present invention comprises an electrolytic water hydrogen production device 1, an ejector 2, a mixed-flow pump 3, a turbine chamber 4, a hydrogen-rich water storage tank 5, a high-pressure pump 6, a porous membrane tube 7, a buffer circulation tank 8, a circulation pump 9, an oil phase storage tank 10, an online vacuum degassing tank 11, a vacuum sensor 12, an automatic pressure relief valve 13, a product collection tank 14, a pressure balancing valve 15, and an opaque sealed container 16.

[0032] Raw materials: deionized water, olive oil (food grade), polyglycerol fatty acid ester (food grade, HLB value 9-11); porous membrane tube 7: SPG glass membrane, membrane pore size 0.5μm; online vacuum degassing tank 11: vacuum degree -0.08MPa, degassing temperature 25℃; buffer circulation tank 8: anchor-type agitator, stirring speed 300r / min; product collection tank 14: inert gas is nitrogen.

[0033] S1. Preparation of hydrogen-rich water: Start the water electrolysis hydrogen production equipment 1, adjust the hydrogen output rate to 1L / min, and introduce the hydrogen into the turbine chamber 4 of the mixed flow pump 3 through the ejector 2; introduce deionized water into the mixed flow pump 3, set the turbine chamber 4 speed to 1500r / min, and continue mixing for 3min; the initial dissolved hydrogen concentration of the hydrogen-rich water is 1.8ppm as detected by the hydrogen concentration detector, and transport it to the hydrogen-rich water storage tank 5 through a sealed pipeline and store it in a sealed container at 25℃.

[0034] S2. Oil phase preparation: Take 100 kg of olive oil and inject it into the oil phase storage tank 10. Start the heating device to raise the temperature to 40℃. Add 2 kg of polyglycerol fatty acid ester at 2% of the weight of olive oil. Start the stirring device and stir at a rate of 500 r / min for 20 min until the emulsifier is completely dissolved and a homogeneous and transparent oil phase is formed. Turn off the heating device and let it cool naturally to 25℃ for later use.

[0035] S3. Membrane Emulsification Formation: Start the temperature control system to stabilize the ambient temperature of the membrane emulsification unit at 25℃; start the high-pressure pump 6 to pump hydrogen-rich water into the dispersed phase inlet of the porous membrane tube 7 at a flow rate of 20mL / min, and maintain the pump output pressure at 0.3MPa; simultaneously start the circulation pump 9 to drive the oil phase to flow tangentially along the outer cavity of the porous membrane tube 7 at a flow rate of 2m / s; after passing through the membrane, the hydrogen-rich water is sheared and wrapped by the oil phase to form a primary emulsion that flows into the buffer circulation tank 8.

[0036] S4. Emulsion homogenization and degassing: Start the stirring device of buffer circulation tank 8 and stir at 300r / min for 20min for homogenization; transfer the emulsion to online vacuum degassing tank 11 and degas for 10min. The vacuum degree sensor 12 monitors in real time, and the automatic pressure relief valve 13 maintains stable pressure.

[0037] S5. Storage and Finished Product: After degassing, the emulsion is sent to the product collection tank 14, nitrogen is introduced to form a protective layer, and the pressure balance valve 15 stabilizes the atmospheric pressure inside the tank; the emulsion is filled into 500mL opaque glass jars through aseptic filling equipment and sealed to obtain the finished product.

[0038] Droplet size: 5-10 μm, coefficient of variation 12%; hydrogen release time: 5 days (25℃).

[0039] 30-day storage stability: 68% hydrogen concentration retention, no stratification or demulsification; Application effect: When added to yogurt, there is no off-odor and it does not affect the flavor and texture of the product.

[0040] Example 2 differs from Example 1 in the following ways: Raw materials: deionized water, silicone oil (cosmetic grade, viscosity 500 mPa·s), Span 60 and Tween 60 (blended mass ratio 1:1); Porous membrane tube 7: ceramic membrane, pore size 2 μm; Online vacuum degassing tank 11: vacuum degree -0.07 MPa, degassing time 15 min; Buffer circulation tank 8: stirring speed 350 r / min, homogenization time 25 min; Hydrogen-rich water preparation: turbine chamber 4 speed 1800 r / min, mixing for 4 min, initial dissolved hydrogen concentration 2.0 ppm; Oil phase preparation: oil phase heated to 45℃, emulsifier added 3%, stirring speed 600 r / min.

[0041] Product performance: Droplet size 15-25μm, particle size variation coefficient 10%; Hydrogen release time: 7 days (25℃); 30-day storage stability: Hydrogen concentration retention rate 72%, no stratification or emulsion breaking; Application effect: Compatible with skin care product formulas, good compatibility with face cream base, and passes skin irritation test.

[0042] Example 3, based on Example 1, differs from Example 1 in the following ways: Raw materials: deionized water, tea seed oil and mineral oil (mixed mass ratio 3:1), polyglycerol fatty acid ester and Span 80 (compounded mass ratio 2:1); porous membrane tube 7: SPG glass membrane, membrane pore size 0.2μm;

[0043] Online vacuum degassing tank 11: vacuum degree -0.09MPa, degassing time 8min; buffer circulation tank 8: stirring rate 400r / min, homogenization time 15min; hydrogen-rich water preparation: turbine chamber 4 speed 1400r / min, mixing 3min, initial dissolved hydrogen concentration 1.6ppm; oil phase preparation: oil phase heated to 38℃, emulsifier addition 1.5%, stirring rate 400r / min.

[0044] Product performance: Droplet size 1-5μm, particle size variation coefficient 8%; Hydrogen release time: 3 days (25℃); 30-day storage stability: Hydrogen concentration retention rate 65%, no stratification or demulsification; Application effect: Filled into capsules, it releases slowly in the gastrointestinal tract and has high bioavailability.

[0045] During operation, high-purity hydrogen is first generated by the water electrolysis hydrogen production equipment 1, and then introduced into the turbine chamber 4 of the mixed flow pump 3 through the ejector 2. It is then sheared and mixed with high-speed rotating deionized water to enhance gas-liquid mass transfer and prepare high-concentration hydrogen-rich water. Subsequently, the oil phase raw material is heated, dissolved by emulsifier, and cooled to form a homogeneous continuous phase. In the membrane emulsification stage, the hydrogen-rich water is driven by the high-pressure pump 6 to pass through the porous membrane tube 7 and is sheared and wrapped by the high-speed oil phase driven by the circulation pump 9 to form a water-in-oil primary emulsion. After the primary emulsion is homogenized and refined by the buffer circulation tank 8, it enters the online vacuum degassing tank 11 to remove air and bubbles to avoid affecting the stability of the emulsion. Finally, it is filled into an opaque container under inert gas protection and atmospheric pressure to complete the preparation of the finished product.

[0046] Throughout the process, the physical barrier formed by the oil phase and the interfacial stabilizing effect of the emulsifier work together to suppress hydrogen escape. Vacuum degassing and inert gas protection further extend the shelf life. The modular device enables continuous production, ensuring stable product quality and adapting to the needs of multiple application fields.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydrogen-rich water-in-oil emulsion based on membrane emulsification technology, comprising a dispersed phase and a continuous phase, wherein the dispersed phase is hydrogen-rich water and the continuous phase is a biocompatible oil phase, the dispersed phase is uniformly dispersed in the continuous phase in the form of micron-sized droplets to form a water-in-oil structure, the initial dissolved hydrogen concentration of the hydrogen-rich water is not less than 1.5 ppm, and an amphiphilic emulsifier is also added to the water-in-oil emulsion, the emulsifier being uniformly dispersed at the interface between the oil phase and the water phase.

2. The hydrogen-rich water-in-oil emulsion based on membrane emulsification technology according to claim 1, characterized in that: The oil phase is selected from one or more of edible oil, mineral oil or silicone oil, with preference given to natural plant oils such as olive oil and tea seed oil. The emulsifier is a food-grade or cosmetic-grade amphiphilic emulsifier, selected from one or more of polyglycerol fatty acid esters, Span emulsifiers, and Tween emulsifiers.

3. The hydrogen-rich water-in-oil emulsion based on membrane emulsification technology according to claim 1, characterized in that: The micron-sized droplets have a particle size of 1-50 μm and a particle size variation coefficient ≤15%. The hydrogen release time of the water-in-oil emulsion is 2-7 days. Under sealed storage conditions at 25°C, the hydrogen concentration retention rate is not less than 60% of the initial concentration after 30 days.

4. The method for preparing a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology according to claim 1, characterized in that: Includes the following steps: S1. Preparation of hydrogen-rich water: Start the water electrolysis hydrogen production equipment (1), and the generated hydrogen gas enters the turbine chamber (4) of the mixed flow pump (3) through the ejector (2) and is sheared and mixed with the high-speed rotating water flow to achieve efficient hydrogen dissolution and obtain hydrogen-rich water with an initial dissolved hydrogen concentration of not less than 1.5 ppm. Store the hydrogen-rich water in the hydrogen-rich water storage tank (5). S2. Oil phase preparation: Heat the oil phase raw material to 30-50℃, add emulsifier at 0.5%-5% of the oil phase mass, stir at a stirring rate of 300-800r / min until the emulsifier is completely dissolved, cool to 20-25℃ to obtain a homogeneous oil phase, and store it in an oil phase storage tank (10). S3, Membrane Emulsification: Start the temperature control system and maintain the ambient temperature at 20-25℃; pump the hydrogen-rich water in the hydrogen-rich water storage tank (5) into the porous membrane tube (7) at a flow rate of 5-50 mL / min through the high-pressure pump (6), and at the same time drive the homogeneous oil phase in the oil phase storage tank (10) to flow tangentially along the outer cavity of the porous membrane tube (7) at a flow rate of 0.5-5 m / s through the circulation pump (9); the hydrogen-rich water passes through the membrane pores of the porous membrane tube (7) under the pressure of 0.1-0.5 MPa and is sheared and wrapped by the high-speed flowing oil phase to form a water-in-oil primary emulsion, which flows into the buffer circulation tank (8). S4. Emulsion homogenization and degassing: The primary emulsion is homogenized in the buffer circulation tank (8) at a stirring rate of 200-500 r / min for 10-30 min. Then, the homogenized emulsion is sent to the online vacuum degassing tank (11) and degassed for 5-15 min under the conditions of vacuum degree of -0.06~-0.09 MPa and temperature of 20-25℃. The vacuum degree in the tank is monitored in real time by the vacuum degree sensor (12), and the pressure in the tank is adjusted by the automatic pressure relief valve (13). S5. Storage and finished product: After degassing, the emulsion is sent to the product collection tank (14). The inert gas protective layer inside the product collection tank (14) isolates the air. The pressure inside the tank is stabilized by the pressure balancing valve (15). Finally, the emulsion is filled into an opaque sealed container (16) and sealed for storage to obtain the hydrogen-rich water-in-oil emulsion finished product.

5. The method for preparing a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology according to claim 4, characterized in that: The membrane material of the porous membrane tube (7) in step S3 is an SPG glass membrane or a ceramic membrane with a pore size of 0.1-10μm; the temperature difference between the oil phase and the hydrogen-rich water is ≤3℃.

6. The method for preparing a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology according to claim 4, characterized in that: The amount of emulsifier added in step S2 can be adjusted according to the type of oil phase. The amount of emulsifier added for natural plant oil is 1%-3%, and the amount of emulsifier added for silicone oil or mineral oil is 2%-5%.

7. The method for preparing a hydrogen-rich water-in-oil emulsion based on membrane emulsification technology according to claim 4, characterized in that: In step S4, the buffer circulation tank (8) is equipped with an anchor-type stirring paddle to achieve full homogenization of the emulsion.

8. The apparatus for preparing hydrogen-rich water-in-oil emulsions according to any one of claims 4-7, characterized in that: The system includes a hydrogen production and hydrogen-rich water preparation unit, an oil phase preparation unit, a membrane emulsification unit, an emulsion treatment unit, and a storage and packaging unit. The hydrogen production and hydrogen-rich water preparation unit includes an electrolytic water hydrogen production device (1), an ejector (2), a mixed-flow pump (3), a turbine chamber (4), and a hydrogen-rich water storage tank (5). The electrolytic water hydrogen production device (1) is connected to the ejector (2), the ejector (2) is connected to the mixed-flow pump (3), the turbine chamber (4) is built into the mixed-flow pump (3), and the mixed-flow pump (3) is connected to the hydrogen-rich water storage tank (5). The oil phase preparation unit includes an oil phase storage tank (10), which has a built-in heating and stirring device. The membrane emulsification unit includes a high-pressure pump (6), a porous membrane tube (7), a circulating pump (9), and a temperature control system. The high-pressure pump (6) is connected in series between the hydrogen-rich water storage tank (5) and the porous membrane tube (7). Between the oil phase storage tank (10) and the porous membrane tube (7), the emulsion treatment unit includes a buffer circulation tank (8), an online vacuum degassing tank (11), a vacuum sensor (12) and an automatic pressure relief valve (13). The buffer circulation tank (8) is connected in sequence with the porous membrane tube (7) and the online vacuum degassing tank (11). The vacuum sensor (12) and the automatic pressure relief valve (13) are both installed on the online vacuum degassing tank (11). The storage and packaging unit includes a product collection tank (14), a pressure balancing valve (15) and an opaque sealed container (16). The product collection tank (14) is connected to the online vacuum degassing tank (11). The pressure balancing valve (15) is installed on the product collection tank (14). The opaque sealed container (16) is adapted to the product collection tank (14).

9. The apparatus for preparing hydrogen-rich water-in-oil emulsion according to claim 8, characterized in that: The product collection tank (14) is opaque, with an inert gas protective layer on the inner wall of the tank, and the porous membrane tube (7) is detachable.

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