A process for storing edible oil

Abstract

The application discloses an edible oil storage process and belongs to the technical field of edible oil storage. The process is a closed loop process of crude oil impurity removal and standing, reducible tempering modification, nitrogen deoxidation protection, normal temperature light-avoiding display, periodic inspection protection and post-display oil recovery, adopts specific proportion of reducible compound additives, limited parameters of laminar flow stirring, segmented nitrogen replacement and directional recovery treatment, solves the problem that the traditional storage process cannot consider the long-term display stability of the exhibition oil and the reusability after the exhibition, and the process condition is controllable and suitable for the visual display scene of the exhibition hall, the oil display appearance can be stabilized, the oil can be reused after the exhibition without damage, and the oil utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the field of edible oil storage technology, specifically to an edible oil storage process adapted for long-term visual display in exhibition halls. Background Technology

[0002] Edible oil displays in exhibition halls require oils to maintain a clear and uniform appearance over a long period, while also needing to be able to recover their original physicochemical properties and be reused after the display. This differs from the application requirements of ordinary edible oils, which are typically stored in sealed containers for short periods. Existing edible oil storage processes only focus on preventing oxidation and deterioration, lacking a dedicated conditioning and restoration system suitable for the visual display in exhibition halls. Conventional modification methods used to improve the visual appeal of oil displays easily lead to the solidification of oil components, making them impossible to restore effectively after the display and resulting in disposal and low oil utilization. Without modification treatment, ordinary oils are prone to problems such as turbidity, precipitation, and darkening of color when displayed statically for a long time, failing to meet the long-term, high-standard visual display requirements of exhibition halls. There is a core technical problem that cannot simultaneously achieve the stability of oil displays in exhibition halls and their reusability after the exhibition. Summary of the Invention

[0003] The purpose of this invention is to provide an edible oil storage process to solve the problems mentioned in the background art.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: An edible oil storage process includes steps such as impurity removal, deoxygenation protection, and room temperature, light-proof storage of the finished edible vegetable oil. It also includes reversible conditioning treatment suitable for exhibition hall displays and post-exhibition oil restoration steps, specifically comprising the following steps: S1. Crude oil impurity removal and settling: The finished edible vegetable oil is filtered through a filter screen to remove suspended impurities and solid particles from the oil, and then settling at room temperature to defoam; S2. Reducible conditioning modification: Add a compound food-grade transparent conditioning agent to the edible oil after it has been left to stand. The conditioning agent is composed of food-grade glycerin and refined edible ethanol. Stir the agent and edible oil at room temperature until they are completely miscible. S3. Deoxygenation protection: Nitrogen gas is used to ventilate and replace the liquid surface and upper space of the conditioned edible oil to reduce the dissolved oxygen content inside the oil. S4. Store at room temperature away from light: Place the processed cooking oil in a well-ventilated environment at room temperature without direct sunlight for static display and storage; S5. Routine condition inspection: Regularly check the condition of the displayed oil products and replenish nitrogen protection as needed; S6. Post-exhibition oil restoration: After the exhibition, the edible oil that has been conditioned is placed in a room temperature and ventilated environment to allow the volatile components in the conditioning agents to be removed naturally, restoring the original physicochemical properties of the edible oil.

[0005] In a preferred embodiment, in step S2, the surface tension of the compounded conditioning agent system is controlled to be 22-26 mN / m; after the agent and edible oil are mixed, a static immersion fusion process is used to let it stand for 8-12 minutes to achieve homogeneous fusion of the agent and edible oil.

[0006] In a preferred embodiment, in step S3, nitrogen replacement adopts a segmented ventilation process, dividing the total ventilation time of 3-5 minutes into 2-3 ventilation segments, with an interval of 40-60 seconds between adjacent ventilation segments, and completing the dissolved oxygen replacement operation above the liquid surface and in the shallow oil layer in segments.

[0007] In a preferred embodiment, in step S6, in a constant temperature, sealed and ventilated environment of 20-25°C, a low-frequency micro-oscillation with a frequency of 5-8Hz and an amplitude of 2-4mm is continuously applied to the oil, while simultaneously purging the surface with a stable airflow with a flow rate of 0.2-0.4m / s.

[0008] In a preferred embodiment, during the additive mixing process in step S2, an axial laminar flow uniform speed stirring process is adopted, and the stirring speed is constantly controlled at 60-90 r / min; based on the total liquid layer height of the oil, the working area of ​​the stirring paddle is limited to the middle and lower liquid layer at a height of 10% to 60% from the bottom of the container, the minimum vertical distance between the top of the paddle and the oil surface is not less than 40% of the total liquid height, and the stirring surface amplitude is ≤0.5 mm.

[0009] In a preferred embodiment, in step S2, the mass ratio of food-grade glycerin to refined edible ethanol is 1:3 to 1:5, the total amount of additives added is 0.3% to 0.8% of the edible oil mass, and the mixture is stirred at a temperature of 15 to 25°C and a standard atmospheric pressure for 3 to 5 minutes.

[0010] In a preferred embodiment, in step S1, the edible oil is filtered once using an 80-120 mesh food-grade nylon filter, and the standing time at room temperature is 30-60 minutes.

[0011] In a preferred embodiment, in step S3, the nitrogen gas used has a purity of ≥99.9%, the nitrogen gas outlet is located 10-20 mm above the oil surface, and the constant ventilation flow rate is controlled at 80-120 mL / min.

[0012] In a preferred embodiment, in step S4, the ambient temperature of the display environment is controlled at 15-25°C and the relative humidity is controlled at 40%-70%.

[0013] In a preferred embodiment, in step S5, an oil condition inspection is carried out every 30 days to monitor the oil's turbidity, stratification, and precipitation. If any abnormalities occur, nitrogen is added in a timely manner for protection.

[0014] Compared with existing technologies, this invention addresses the unique working conditions of edible oil displays in exhibition halls. Through optimized reducible conditioning ratios, refined and undisturbed mixing processes, segmented deoxidation protection, and directional non-destructive restoration processes, it effectively improves the problems of turbidity, precipitation, and color deterioration in oils displayed for extended periods. Controllable interface property regulation and static immersion ensure uniform distribution of additives within the oil, maintaining its clarity and appearance during long-term display. Segmented nitrogen replacement and periodic protection effectively reduce the oxidation rate, adapting to the requirements of long-term static display. Combined with low-frequency micro-oscillation and surface airflow purging, conditioning additives are stably removed, restoring the displayed oil to its original physicochemical properties without the need for waste disposal. This significantly improves oil utilization and reduces the operating costs of oil displays in exhibition halls. The overall process is mild, parameters are controllable, and it is highly practical, effectively balancing the dual needs of high-standard exhibition effects and oil recycling. Attached Figure Description

[0015] Figure 1 This invention relates to a process flow diagram of an edible oil storage process. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0018] like Figure 1 As shown in the figure, this embodiment discloses an edible oil storage process suitable for long-term visual display in exhibition halls. The entire process adopts a physical treatment method at room temperature and pressure without chemical modification reactions. It mainly completes the processing operation through six major steps: crude oil impurity removal and settling, reducible conditioning and modification, nitrogen deoxygenation protection, room temperature and light-proof display, periodic condition inspection, and post-exhibition oil restoration. The entire process is coherent, with clear parameters, and can be implemented. It can meet the long-term transparent display requirements of exhibition halls, and the oil can be restored and reused after the exhibition.

[0019] In the specific implementation process, the crude oil is first subjected to impurity removal and settling operations. The purchased finished edible vegetable oil is then filtered through a filter screen to remove suspended impurities and solid particles that may have entered the oil during production, transportation, and bottling. After filtration, the oil is allowed to stand at room temperature for a corresponding period of time to eliminate tiny air bubbles trapped inside, thus stabilizing the overall state of the oil.

[0020] After crude oil pretreatment, a reducible conditioning and modification process is carried out. Food-grade glycerin and refined edible ethanol are selected as raw materials and compounded to form a transparent conditioning agent. The prepared conditioning agent is added to the edible oil after it has been allowed to stand and stabilized, and the mixture is continuously stirred at room temperature until the agent and the oil are completely miscible. The physical properties of the two-component agent are used to optimize the transparency of the oil and meet the visualization requirements of the exhibition hall.

[0021] After conditioning and mixing, deoxygenation protection is carried out. High-purity nitrogen is used to ventilate and replace the space in the container holding the oil and the shallow liquid surface area of ​​the oil. By replacing the nitrogen, the dissolved oxygen content inside the oil is reduced, weakening the medium conditions for oil oxidation and deterioration, and providing an inert protection basis for long-term storage.

[0022] After deoxygenation, the oil is transferred to the display area for static storage in a cool, dark environment away from direct sunlight and with stable ventilation. This reduces the impact of external factors such as light and strong airflow disturbance on the appearance of the oil and maintains a uniform and transparent appearance during the display process.

[0023] During the oil product display period, routine condition inspections are carried out to regularly observe the appearance and quality changes of the oil products. Nitrogen is added as needed based on the degree of decay of the inert atmosphere inside the container and the actual condition of the oil products to continuously maintain a stable protective environment.

[0024] After the exhibition period ends, post-exhibition oil restoration work will be carried out. The oils that have undergone conditioning and modification and have been displayed for a long time will be transferred to a room temperature and ventilated environment to stand. Taking advantage of the room temperature volatility of the ethanol component in the conditioning additives, the volatile components of the additives will be naturally removed, and the microstructure and physicochemical properties of the oils will be gradually restored to their original state before modification, so as to realize the restoration and reuse of the oils.

[0025] The entire process is designed based on the oxidative deterioration mechanism of edible oil, the mutual solubility and volatility characteristics of additives, and the laws of gas displacement mass transfer. The entire process is well-connected and simple to operate. Compared with the traditional edible oil storage method that only focuses on sealing to prevent deterioration, this process adds a reversible conditioning system, which improves the problem of ordinary oils becoming cloudy, dark, and precipitating impurities during long-term display. At the same time, it addresses the industry shortcoming that modified oils cannot be reconstituted and can only be discarded. It takes into account the display effect, oil quality, and recycling value, and is suitable for the application scenarios of long-term static visual display in various exhibition halls.

[0026] Based on the above implementation method, in the conditioning and modification process, it is necessary to control the interfacial properties of the conditioning aids and the standing time after mixing. The overall surface tension of the compounded conditioning aid system should be controlled within the range of 22–26 mN / m. After the aids and edible oil are mechanically mixed, they should not be immediately placed in a display case. They should be left to stand in a sealed container for 8–12 minutes to achieve homogeneous mixing throughout the entire process through static immersion and fusion.

[0027] When the surface tension of the additive system is stabilized within the aforementioned range, the interfacial tension barrier between the additives and vegetable oil is weakened, reducing the resistance to fusion between the two phases. This allows additive molecules to penetrate uniformly into the microscopic gaps of the oil, rather than being confined to the surface, thus reducing localized additive accumulation and stratification. Mechanical stirring only achieves macroscopic mixing of the oil, often resulting in uneven concentrations in certain areas. After 8–12 minutes of static soaking, these concentration differences can be further reduced, allowing the additives to be evenly dispersed within the oil. This treatment method can regulate the microscopic system of the oil, reducing the problems of particle precipitation and oil fogging caused by localized additive aggregation during long-term display, and stabilizing the displayed appearance. Simultaneously, it creates a uniform additive distribution structure, allowing the post-exhibition evaporation and removal of additives to proceed synchronously and uniformly, reducing localized additive residues, and simultaneously ensuring both the display effect and the accuracy of post-exhibition oil restoration. This overcomes the technical limitations of conventional mechanical stirring, which only achieves macroscopic mixing.

[0028] Based on the above implementation method, the nitrogen deoxygenation replacement process is carried out using a segmented ventilation method. The total ventilation time is controlled within 3 to 5 minutes, and the total ventilation time for a single operation is divided into 2 to 3 independent ventilation segments. A 40 to 60-second interval is set between two adjacent ventilation segments. Through segmented ventilation and intermittent pressure stabilization, the replacement of dissolved oxygen in the space above the liquid surface and in the shallow oil layer is completed step by step.

[0029] Continuous airflow constantly impacts the oil surface, disturbing the surface fluid structure and causing tiny bubbles to be trapped inside the oil. It also only replaces air in the upper part of the container, with limited effect on dissolving oxygen in the shallow oil layer. This implementation uses a segmented ventilation design. During the ventilation phase, nitrogen is continuously introduced to replace the air inside the container and the dissolved oxygen released from the shallow layer. During the interval settling phase, the airflow is stopped and the container is kept sealed, allowing the residual dissolved oxygen in the shallow oil layer to fully diffuse and release, achieving gradient deoxygenation. Throughout the process, there is no continuous strong airflow disturbance, and the oil surface remains stable, reducing problems such as bubble entrainment and surface turbulence. This optimized process effectively blocks oxidizing media, ensures deoxygenation protection, and reduces the impact of the ventilation process on the oil's appearance, thus resolving the technical contradiction between deoxygenation effectiveness and oil appearance protection in conventional processes.

[0030] Based on the above implementation method, the post-exhibition oil remediation process adopts a combined treatment method of constant temperature, micro-vibration, and micro-airflow. Specifically, in a constant temperature, sealed and ventilated environment of 20-25℃, low-frequency micro-vibration with a frequency of 5-8Hz and an amplitude of 2-4mm is continuously applied to the oil after it has been displayed, while a stable surface airflow with a flow rate of 0.2-0.4m / s is continuously blown to complete the removal of additives and the remediation of oil.

[0031] Relying solely on natural evaporation at room temperature results in the oil fluid remaining completely still throughout the process. Deeply enriched conditioning agents diffuse slowly, with only surface agents evaporating gradually, easily leading to deep agent residue and affecting the rehydration effect. This embodiment utilizes a low-frequency, small-amplitude micro-oscillation mode to induce gentle and orderly laminar flow in the oil, improving the stagnant state of the deep fluid and promoting the continuous and slow migration and enrichment of residual agents towards the liquid surface. These oscillation parameters do not disrupt the oil fluid's steady state, minimizing the risk of quality defects such as stratification, turbidity, and flocculation. The matched low-speed surface airflow acts only on the space above the liquid surface, promptly removing evaporating agent components and maintaining a concentration difference between the inside and outside of the liquid surface, providing stable mass transfer momentum for agent evaporation. Simultaneously, the constant temperature environment reduces the disturbance of temperature fluctuations to the oil's physicochemical structure, maintaining stable oil quality throughout the rehydration process. This synergistic treatment method simultaneously addresses the dual problems of insufficient agent removal, deep residue, and oxidation and deterioration caused by ventilation in conventional rehydration processes, resulting in excellent process optimization.

[0032] Based on the above implementation method, the conditioning and modification mixing process adopts an axial laminar flow uniform speed stirring method within a limited range. The stirring speed is constantly controlled at 60-90 r / min. Based on the overall liquid level of the oil, the working range of the stirring paddle is limited to the middle and lower liquid level within 10% to 60% of the height from the bottom of the container. The vertical distance between the top of the stirring paddle and the oil surface is always not less than 40% of the total liquid height. The amplitude of the oil surface vibration is controlled within 0.5 mm throughout the stirring process.

[0033] If high-speed turbulent agitation is used throughout the entire liquid layer, the agitator will traverse the entire liquid layer, and the high-speed eddies will continuously impact the liquid surface, generating numerous microbubbles that remain inside the oil. This can also easily cause localized agglomeration of additives and uneven mixing, affecting the subsequent appearance and restoration effects. This embodiment uses low-speed axial laminar flow agitation, allowing the lower and middle layers of oil to form a stable and orderly axial flow, reducing the generation of chaotic eddies. By limiting the agitation area by a specific height ratio, the upper liquid surface area is completely avoided, reducing the direct impact of the agitation structure on the liquid surface and keeping surface fluctuations at a low level. After the lower and middle layers of oil are fully mixed, homogeneous fusion can be achieved through the diffusion of oil molecules themselves, eliminating the need for full-area agitation to achieve uniform additive mixing. This agitation method, through multiple limitations on rotation speed, operating range, and liquid surface fluctuations, achieves homogeneous mixing of additives and low-disturbance appearance protection through a single agitation process, improving the technical problem in the industry where mixing quality and oil appearance protection are mutually restrictive.

[0034] Based on the above implementation method, the preparation and mixing of the conditioning adjuvant are controlled with fixed parameters. The mass ratio of food-grade glycerin to refined edible ethanol is controlled within the range of 1:3 to 1:5, and the total amount of adjuvant added is 0.3% to 0.8% of the total mass of edible oil. The mixing of the adjuvant and the oil is carried out at 15 to 25°C and standard atmospheric pressure, with continuous stirring time controlled at 3 to 5 minutes to ensure uniform miscibility of the adjuvant.

[0035] In the compound additives, refined edible ethanol possesses excellent oil miscibility and readily volatile properties at room temperature, primarily used to optimize the oil's transparency and appearance, and ensure its reversibility in later stages. Food-grade glycerin exhibits excellent interfacial stabilizing effects, stabilizing the oil's microstructure and reducing the precipitation of trace substances. A mixing ratio range of 1:3 to 1:5 balances the functional advantages of the two components, ensuring the additives' volatility and reversibility while maintaining sufficient stabilizing capacity, reducing fluctuations in the oil's appearance during display. Strictly limiting the additive dosage within the corresponding range avoids insufficient conditioning effects and poor oil transparency due to excessive dosage, while also reducing the risk of additive accumulation and excessive removal load due to excessive dosage. The mild operating conditions at room temperature and pressure do not damage the inherent physicochemical properties of edible oils. Short-term stirring ensures uniform mixing while reducing the contact time between the oil and air, lowering the risk of trace oxidation during stirring. The entire parameter system is adapted to the dual needs of stable oil display and non-destructive reversibility in exhibition halls.

[0036] Based on the above implementation method, the crude oil pretreatment process adopts filtration and static stabilization. An 80-120 mesh food-grade nylon filter is used to perform a single filtration of the finished edible oil. After filtration, the oil is allowed to stand at room temperature for 30-60 minutes to complete the crude oil impurity removal and stabilization process.

[0037] The 80-120 mesh food-grade nylon filter screen is well-suited to the purification needs of finished edible oils, effectively intercepting micron-sized suspended impurities, flocculent particles, and mechanical impurities without retaining the effective components of the oil. It allows for routine fine impurity removal without the need for precision filtration equipment. During filtration and transport, oils easily trap hidden microbubbles, which are difficult to see with the naked eye. Over time, these bubbles gradually separate, causing the oil to become foggy and cloudy. A 30-60 minute settling time at room temperature provides sufficient time for the oil to stabilize, allowing hidden bubbles to gradually rise and release, while also allowing trace amounts of residual impurities to settle, thus restoring the oil to its initial pure state. This pretreatment process reduces initial defects such as impurities and bubbles, providing a stable and pure foundation for subsequent conditioning, deoxygenation, display, and reconstitution processes, ensuring stable and controllable process effects at each stage.

[0038] Based on the above implementation method, the nitrogen deoxygenation protection process adopts standardized operating parameters for control. The purity of the nitrogen used is not less than 99.9%, and the nitrogen outlet is fixedly arranged 10-20 mm above the oil surface. During the ventilation process, a constant ventilation flow rate of 80-120 mL / min is maintained, and deoxygenation replacement is completed in conjunction with the segmented ventilation process.

[0039] High-purity nitrogen (≥99.9%) has low impurity and oxygen content, reducing the introduction of oxidizing impurities and water vapor during the replacement process, maintaining the purity of the deoxygenation protection medium, and lowering the risk of secondary degradation caused by the ventilation process. The outlet is suspended above the liquid surface, avoiding direct contact with the oil, reducing the impact of airflow scouring and affecting the liquid surface, thus mitigating issues such as liquid surface damage, oil disturbance, and bubble entrainment. A constant low-to-medium flow rate of 80–120 mL / min allows nitrogen to diffuse smoothly and uniformly, gradually penetrating from the upper part of the container to the shallow oil layer, orderly replacing air and dissolved oxygen, achieving uniform deoxygenation of both the gas and liquid phases. The overall set of operating parameters effectively reduces the content of oxidizing media in the oil, alleviating acidification, deterioration, and color darkening, while maintaining the stability of the oil's fluid structure and appearance, meeting the protection requirements for long-term static display.

[0040] Based on the above implementation method, the ambient temperature and humidity are controlled during the oil product display stage. The ambient temperature in the display area is stably controlled at 15-25℃, and the relative humidity is controlled at 40%-70%, maintaining stable environmental parameters throughout the process and reducing large fluctuations.

[0041] The rates of oxidation, polymerization, and substance precipitation in edible oils are closely related to ambient temperature. A temperature range of 15–25℃ can effectively slow down the rate of oil oxidation and decomposition, as well as the polymerization and precipitation of trace substances, mitigating the accelerated deterioration at high temperatures and the flocculation and turbidity at low temperatures, thus maintaining the stability of the oil's color and transparency over the long term. A relative humidity range of 40%–70% is suitable for oil display conditions. Excessive humidity can easily cause condensation on the inner walls of containers, and water vapor penetrating the oil can lead to hydrolysis, mold growth, and deterioration. Insufficient humidity accelerates the evaporation of surface moisture, resulting in a dry surface and distorted color. By controlling temperature and humidity, the risks of various oil deterioration risks caused by environmental fluctuations can be reduced, meeting the long-term, static, and visual display needs of exhibition halls.

[0042] Based on the above implementation method, a periodic dynamic inspection and protection method is adopted during the oil product display period. An oil product condition inspection is carried out every 30 days, focusing on observing whether the oil product shows abnormalities such as turbidity, stratification, or precipitation. When fluctuations in oil product condition or decay of the inert protective atmosphere are detected, nitrogen replenishment protection operations are carried out in a timely manner.

[0043] Display containers are difficult to seal completely. During long-term display, trace amounts of external oxygen can slowly seep into the container, continuously consuming the nitrogen inert protective atmosphere and causing a gradual decline in the protective effect. This can easily lead to slow oxidation of the oil and the precipitation of impurities. A fixed inspection cycle of 30 days can promptly detect microscopic signs of early oil deterioration and assess the state of degradation of the protective environment. Upon detection of abnormalities, timely replenishment of trace amounts of nitrogen can restore the oxygen-free inert environment inside the container and re-establish a stable protective system. This dynamic protection mode can compensate for the shortcomings of traditional one-time deoxygenation, which only provides short-term protection. It maintains the stability of oil under long-term display conditions, slows down the oil deterioration process, extends the safe display period, and ensures uniform appearance of the displayed products throughout the entire process.

[0044] Based on the above implementation method, the post-exhibition oil remediation process has a clearly defined duration and removal standard. After the exhibition, the oil is left to stand for 24–48 hours in a normal temperature and ventilated environment. The removal rate of volatile components of conditioning additives is no less than 98%, thus completing the oil remediation operation.

[0045] The ethanol component in conditioning auxiliaries is removed through its room-temperature volatility, which is the core basis for oil reconstitution. A gradient settling time of 24–48 hours, adapted to the natural evaporation rate of the ethanol component, ensures the gradual and complete removal of volatile components, reducing component residues caused by insufficient settling time or oil quality fluctuations caused by excessive settling time. A removal standard of no less than 98% provides a quantitative basis for oil reconstitution, distinguishing between incomplete and complete reconstitution states, and reducing the impact of trace auxiliaries on the oil's flavor, color, and physicochemical properties. While the auxiliaries fully volatilize, the slightly disturbed microscopic molecular structure of the oil can autonomously reset, gradually restoring to its uniform and stable state before conditioning treatment. This allows the displayed oil to return to its original edible quality, achieving a synergistic application of the exhibition hall's display function and the oil's recycling function, overcoming the technical shortcomings of traditional modified display oils that are difficult to reconstitute and can only be discarded.

[0046] 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 terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Unless otherwise specified, an element defined by the phrase "comprising..." or "including..." does not exclude the presence of additional elements in the process, method, article, or terminal device that includes said element. Additionally, in this document, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number.

[0047] The above description of the embodiments is provided to facilitate understanding and use of the present invention by those skilled in the art. It is obvious to those skilled in the art that various modifications can be easily made to the embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the above embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. An edible oil storage process, comprising the steps of removing impurities from the finished edible vegetable oil, deoxygenating and protecting it, and storing it at room temperature away from light, characterized in that, It also includes reversible conditioning treatments to suit the exhibition hall display and post-exhibition oil restoration procedures, specifically including the following steps: S1. Crude oil impurity removal and settling: The finished edible vegetable oil is filtered through a filter screen to remove suspended impurities and solid particles from the oil, and then settling at room temperature to defoam; S2. Reducible conditioning modification: Add a compound food-grade transparent conditioning agent to the edible oil after it has been left to stand. The conditioning agent is composed of food-grade glycerin and refined edible ethanol. Stir the agent and edible oil at room temperature until they are completely miscible. S3. Deoxygenation protection: Nitrogen gas is used to ventilate and replace the liquid surface and upper space of the conditioned edible oil to reduce the dissolved oxygen content inside the oil. S4. Store at room temperature away from light: Place the processed cooking oil in a well-ventilated environment at room temperature without direct sunlight for static display and storage; S5. Routine condition inspection: Regularly check the condition of the displayed oil products and replenish nitrogen protection as needed; S6. Post-exhibition oil restoration: After the exhibition, the edible oil that has been conditioned is placed in a room temperature and ventilated environment to allow the volatile components in the conditioning agents to be removed naturally, restoring the original physicochemical properties of the edible oil.

2. The edible oil storage process according to claim 1, characterized in that, In step S2, the surface tension of the compounded conditioning agent system is controlled to be 22-26 mN / m; after the agent and edible oil are mixed, a static immersion and fusion process is adopted to let it stand for 8-12 minutes to achieve homogeneous fusion of the agent and edible oil.

3. The edible oil storage process according to claim 1, characterized in that, In step S3, nitrogen replacement adopts a segmented ventilation process, dividing the total ventilation time of 3-5 minutes into 2-3 ventilation segments, with an interval of 40-60 seconds between adjacent ventilation segments, and completing the dissolved oxygen replacement operation above the liquid surface and in the shallow oil layer in segments.

4. The edible oil storage process according to claim 1, characterized in that, In step S6, in a constant temperature, sealed and ventilated environment of 20-25℃, low-frequency micro-oscillations with a frequency of 5-8Hz and an amplitude of 2-4mm are continuously applied to the oil, while simultaneously purging the surface with a stable airflow with a flow rate of 0.2-0.4m / s.

5. The edible oil storage process according to claim 1, characterized in that, In step S2, during the mixing of the additives, an axial laminar flow uniform speed stirring process is adopted, and the stirring speed is constantly controlled at 60-90 r / min. Based on the total liquid level of the oil, the working area of ​​the stirring paddle is limited to the middle and lower liquid level, which is 10% to 60% of the height from the bottom of the container. The minimum vertical distance between the top of the paddle and the oil surface is not less than 40% of the total liquid level, and the stirring surface amplitude is ≤0.5 mm.

6. The edible oil storage process according to claim 1, characterized in that, In step S2, the mass ratio of food-grade glycerin to refined edible ethanol is 1:3 to 1:5, and the total amount of additives added is 0.3% to 0.8% of the edible oil mass. The mixture is stirred at a temperature of 15 to 25°C and a standard atmospheric pressure for 3 to 5 minutes.

7. The edible oil storage process according to claim 1, characterized in that, In step S1, the edible oil is filtered once using an 80-120 mesh food-grade nylon filter, and left to stand at room temperature for 30-60 minutes.

8. The edible oil storage process according to claim 1, characterized in that, In step S3, the nitrogen gas used has a purity of ≥99.9%, the nitrogen outlet is located 10-20 mm above the oil surface, and the constant ventilation flow rate is controlled at 80-120 mL / min.

9. The edible oil storage process according to claim 1, characterized in that, In step S4, the ambient temperature of the display environment is controlled at 15-25℃, and the relative humidity is controlled at 40%-70%.

10. The edible oil storage process according to claim 1, characterized in that, In step S5, an oil condition inspection is conducted every 30 days to monitor the oil's turbidity, stratification, and precipitation. If any abnormalities are found, nitrogen is added in a timely manner for protection.

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