A strong-flavor refining machine

Abstract

This invention relates to the field of edible oil refining technology, specifically to a strong-aroma refining machine, including a frame, and a refining tank, a dehydration tank, a vacuum device, and a filter mounted on the frame. The refining tank and the dehydration tank are connected via a conveying pipe, and the dehydration tank is connected to the filter. An oil-liquid separation mechanism is provided between the dehydration tank and the vacuum device. This invention addresses the problem of oil loss and equipment contamination caused by vigorous foaming during dehydration and deodorization, by adding an oil-liquid separation mechanism between the dehydration tank and the vacuum device. This mechanism uses tangential air intake and a special cavity design to generate a high-speed swirling flow of foamy air, using centrifugal force to separate oil droplets to the wall surface for recovery, while the purified gas is discharged. This design effectively reduces oil loss, improves refining yield, protects the vacuum device, and ensures production stability and economic benefits.

Description

Technical Field

[0001] This invention relates to the field of edible oil refining technology, specifically to a strong-aroma refining machine. Background Technology

[0002] Strongly aromatic edible oils are loved by consumers for their unique flavor and rich nutritional value. These oils usually retain the unique aroma components of oil crops, such as volatile substances like pyrazines and furans. In the oil refining process, in order to remove impurities and ensure storage stability, they often need to go through processes such as washing and deodorization. Among them, the deodorization process is usually carried out under high temperature and high vacuum conditions to remove odor substances by stripping.

[0003] However, when edible oil is deodorized after washing, the boiling point of the residual water in the oil drops sharply under vacuum, causing it to vaporize instantly and generate a large number of fine bubbles inside the oil. The phospholipids, proteins, colloids and other substances remaining in the oil are natural surfactants. They encapsulate the bubbles to form a stable film, preventing the bubbles from merging and breaking, thus keeping the foam layer persistent. The foam layer occupies a large amount of effective space inside the tank, hindering the smooth escape of water vapor, prolonging the dehydration time, and the top of the foam can easily approach or even rush into the vacuum extraction port, causing the light foam and mist-like oil droplets to be directly entrained into the vacuum pipeline, resulting in oil loss, reduced refining yield, and contamination of the vacuum pump, increasing maintenance costs and downtime risks.

[0004] To address the aforementioned issues, existing technologies, such as the patent with publication number CN202297560U entitled "A Vacuum System for Deodorizing Edible Oil," include a deodorization tower, a fatty acid trap, and a four-stage steam jet pump. The fatty acid trap is equipped with a cooling coil, which uses condensation to capture and recover oil mist in the airflow. This solution reduces oil loss to some extent, but it still has the following shortcomings: condensation and capture require a large amount of cooling medium, resulting in high energy consumption; the cooling coil has a complex structure and occupies a large space; the capture efficiency for fine oil droplets is limited, and after long-term operation, it is prone to blockage due to the adhesion of oil mist condensate, affecting the system stability.

[0005] Therefore, an oil mist separation device with simple structure, low energy consumption, and high separation efficiency is proposed to solve the above-mentioned problems. Summary of the Invention

[0006] Technical problems to be solved In view of the above-mentioned shortcomings of the existing technology, the present invention provides a strong aroma refining machine, which can solve the problems of large oil loss and easy contamination of vacuum equipment caused by foam and oil mist entrainment during the dehydration and deodorization process in the existing technology.

[0007] Technical solution To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a strong aroma refining machine, including a frame, and a refining tank, a dehydration tank, a vacuum device and a filter installed on the frame. The refining tank and the dehydration tank are connected by a conveying pipe, the dehydration tank is connected to the filter, and an oil-liquid separation mechanism is provided between the dehydration tank and the vacuum device. The oil separation mechanism includes a separation chamber, which is connected to the upper part of the dehydration tank through an air inlet pipe and to the vacuum device through an exhaust pipe. The bottom of the separation chamber is provided with an oil drain pipe connected to the dehydration tank. The outlet end of the intake pipe is connected along the tangential direction of the separation chamber, so that the airflow can enter the separation chamber tangentially; the cavity of the separation chamber is constructed such that its cross-sectional area gradually decreases from top to bottom, so that the incoming airflow forms an outward swirling flow rotating downward along the cavity wall; the exhaust pipe is arranged along the axis of the separation chamber, and its inlet is located in the top central area of ​​the separation chamber, which is used to discharge the separated airflow that gathers and rises towards the center.

[0008] Furthermore, a metal wire mesh is provided at the inlet of the air intake pipe.

[0009] Furthermore, the air intake pipe is provided with a perforated sleeve on its inner side at the connection with the separation chamber. The perforated sleeve has a plurality of slits that connect its inside and outside. The extension direction of the slits has a tangential component that is consistent with the predetermined rotation direction of the airflow in the separation chamber.

[0010] Furthermore, a spiral guide plate is provided on the inner wall of the separation chamber, and the starting end of the guide plate is located in the tangential direction of the air inlet pipe outlet.

[0011] Furthermore, the inner wall of the separation chamber is provided with multiple grooves along its axial direction.

[0012] Furthermore, the cross-section of the trench is triangular.

[0013] Furthermore, the opening width and depth of the trench continuously vary along the axial direction of the separation chamber to match the axially varying fluid dynamic conditions within the separation chamber.

[0014] Furthermore, a plurality of guide vanes are provided below the inlet of the exhaust pipe, and the plurality of guide vanes are distributed at intervals around the axis of the separation chamber.

[0015] Furthermore, the inlet section of the intake pipe is constructed such that its cross-sectional area gradually decreases along the airflow direction.

[0016] Furthermore, both the refining tank and the dehydration tank are equipped with a stirring mechanism.

[0017] Beneficial effects The technical solution provided by this invention has the following advantages compared with the prior art: This invention establishes a multi-stage foam pretreatment mechanism by incorporating a stirring mechanism within the dehydration tank and adding an inlet metal mesh and a built-in porous sleeve to the upstream of the vacuum pipeline. During the deodorization process of edible oil, the oil does not passively accept foam but actively intervenes. First, at the source of foam generation, inside the dehydration tank, high-speed rotating agitator blades are used to directly physical shear and impact the foam layer, thereby disrupting the stable structure of the foam from the source and inhibiting its excessive development. Secondly, before the airflow carrying mist enters the separation system, a metal wire mesh is installed at the inlet of the air inlet. Its porous structure is used to shear and compress the foam in the airflow, causing it to break down and coalesce. Finally, at the instant the airflow enters the separation chamber, a porous sleeve with a specific angled slit divides the airflow into multiple fine jets with tangential components, achieving airflow pre-rotation and rectification. This effectively reduces the foam load and foam size entering the core separation unit, transforming the unstable, oil-droplet-entraining thick foam layer into mist-like droplets that are easier to separate by centrifugal force. This creates favorable conditions for subsequent efficient separation and also reduces the instantaneous processing pressure of the separation chamber. Furthermore, the airflow enters a frustum-shaped separation chamber, wider at the top and narrower at the bottom, through a tangential inlet pipe. This naturally forms a high-speed, downward-facing external spiral vortex, using centrifugal force to throw oil droplets towards the wall. The inlet pipe is designed with a tapering shape, narrower at the top and wider at the bottom, optimizing the inlet momentum and angle. A spiral guide plate is placed at the initial position on the inner wall of the separation chamber to further guide and consolidate the swirling flow field, accelerating the radial motion of the oil droplets. Multiple grooves are machined from top to bottom on the entire inner wall of the separation chamber. These grooves not only act as micro-vortex generators to stabilize the near-wall flow field but also enhance the centrifugal force. The key to the effective oil collection lies in the powerful capillary force generated by its sharp edges. This force actively adsorbs and collects oil droplets that collide with the wall, agglomerating and guiding them through a natural channel formed by the triangular cross-section. This allows the oil to flow rapidly and directionally along the tank to the bottom drain pipe. This design enhances both separation and drainage, improving the oil droplet collection efficiency. In particular, it prevents the retention of fine droplets on the wall and their secondary entrainment by the airflow, ensuring that the separated oil can be quickly and thoroughly recovered to the dehydration tank, thus improving the refining yield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is an isometric schematic diagram of the refining machine structure in an embodiment of the present invention; Figure 2 This is a front view schematic diagram of the refining machine structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the refining tank and dehydration tank in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the installation position of the oil separation mechanism in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the internal structure of the separation chamber in an embodiment of the present invention; Figure 6 This is a top view of the internal structure of the separation chamber in an embodiment of the present invention; Figure 7 This is a front cross-sectional view of the separation chamber in an embodiment of the present invention; Figure 8 This is a schematic diagram of the trench structure in an embodiment of the present invention.

[0020] The labels in the diagram represent: 1. Frame; 2. Refining tank; 3. Dehydration tank; 4. Feeding pipe; 5. Conveying pipe; 6. Vacuum equipment; 7. Filter; 8. Stirring mechanism; 9. Oil separation mechanism; 901. Separation chamber; 902. Air inlet pipe; 903. Oil outlet pipe; 904. Exhaust pipe; 905. Guide plate; 906. Metal wire mesh; 907. Perforated sleeve; 908. Slit; 909. Groove; 910. Guide vane. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0025] The present invention will be further described below with reference to embodiments.

[0026] Example: Please refer to the appendix. Figure 1-8 This solution proposes a strong-aroma refining machine, including a refining tank 2, a dehydration tank 3, a vacuum device 6, and a filter 7, all mounted on a frame 1.

[0027] In use, the oil is fed to the refining tank 2 via the feeding pipe 4 for washing to remove colloidal impurities such as phospholipids. The washed oil is then conveyed to the dehydration tank 3 via the conveying pipe 5 located below the refining tank 2 for heating. The dehydration tank 3 is also connected to a vacuum device 6, where the oil is deodorized and stripped to remove odorous substances under high temperature and high vacuum conditions. Finally, the deodorized oil in the dehydration tank 3 is filtered by a filter 7 and then discharged for bottling.

[0028] Furthermore, two refining tanks 2 are installed on the frame 1. Specifically, both the refining tank 2 and the dehydration tank 3 are equipped with a stirring mechanism 8, which is used to stir during the washing and deodorization process, breaking the interface between the oil and water phases, and allowing the washing liquid to come into large-scale, high-efficiency contact with the edible oil. When the washed edible oil is deodorized in the dehydration tank 3, under the action of vacuum, the boiling point of the water in the edible oil drops sharply and vaporizes instantly, generating a large number of fine bubbles inside the oil. The phospholipids, proteins, colloids, and other substances remaining in the oil are natural surfactants. They encapsulate the bubbles to form a stable film, preventing the bubbles from merging and breaking, and keeping the foam layer persistent. The foam layer occupies a large amount of effective space inside the tank, hindering the smooth escape of water vapor and prolonging the dehydration time.

[0029] Therefore, by operating the stirring mechanism 8 inside the dehydration tank 3 and stirring the edible oil and foam therein, the high-speed rotating blades directly physically shear and impact the rising foam, strongly destroying the stable structure of the foam, causing it to quickly merge and break, releasing the entrained liquid oil, thus inhibiting the excessive development and stabilization of the foam layer from the source.

[0030] The difference is that an oil separation mechanism 9 is also installed between the dehydration tank 3 and the vacuum equipment 6. This mechanism is used to capture and separate the foam and oil mist before they are removed by the vacuum, which significantly reduces oil loss, improves refining yield, and prevents oil from contaminating the vacuum equipment 6, ensuring its stable operation.

[0031] More specifically, the oil-liquid separation mechanism 9 includes a separation chamber 901 disposed between the dehydration tank 3 and the vacuum equipment 6 connecting pipeline. An air inlet pipe 902 connected to the separation chamber 901 and communicating with the interior is connected to the separation chamber 901. The other end of the air inlet pipe 902 is connected to the top of the dehydration tank 3 and communicating with the interior of the dehydration tank 3. An oil drain pipe 903 is also connected to the bottom of the separation chamber 901. The other end of the oil drain pipe 903 is also connected to the dehydration tank 3 and communicating with the dehydration tank 3.

[0032] An exhaust pipe 904 is also connected to the shaft of the separation chamber 901. The upper end of the exhaust pipe 904 is connected to the vacuum device 6. When the stirring mechanism 8 breaks the foam in the dehydration tank 3, the airflow carrying a small amount of mist will be transported to the separation chamber 901 through the air inlet pipe 902 for the subsequent oil-liquid separation process.

[0033] One end of the intake pipe 902 is tangentially connected to the surface of the separation chamber 901, so that the airflow carrying a small amount of mist will enter the separation chamber 901 tangentially.

[0034] The separation chamber 901 is designed in a frustum shape, with its radius gradually decreasing from top to bottom. This causes the airflow carrying a small amount of mist to form a high-speed downward spiral vortex along the cavity wall of the separation chamber 901 when it enters the chamber.

[0035] Furthermore, the wider upper part of the separation chamber 901 provides sufficient space for airflow rotation, stabilizing the vortex; while the lower part narrows, and as the cross-section decreases, the rotational speed increases sharply, and the centrifugal force is significantly amplified. Oil droplets, whose density is much greater than that of gas, are violently thrown against the chamber wall under the action of strong centrifugal force.

[0036] Oil droplets that hit the cavity wall lose kinetic energy and, under the influence of gravity and downward airflow, form a liquid film and flow downwards along the wall. Finally, they are discharged back into the dehydration tank 3 through the oil drain pipe 903 connected to the bottom of the separation chamber 901. This means that the oil that was carried away by the airflow due to foaming during the dehydration and deodorization process is recycled, which directly reduces the oil loss in the refining process and increases the yield of the final product.

[0037] When the water vapor that has lost oil droplets reaches the vicinity of the bottom of the cone, due to the obstruction of the lower oil outlet and the low-pressure core in the central area, the flow direction is reversed by 180 degrees, forming an upward internal spiral vortex, which is eventually discharged upward from the exhaust pipe 904 located on the central axis of the separation chamber 901.

[0038] The separated gas becomes clean and is discharged from the central exhaust pipe 904. This effectively prevents oil droplets from entering and contaminating the subsequent vacuum pump, avoiding efficiency loss, increased wear, and higher maintenance costs caused by pump oil contamination, and ensuring the stable operation of the core vacuum deodorization section.

[0039] It is worth noting that the air intake pipe 902 is L-shaped, with its horizontal end connected to the separation chamber 901 and its vertical end connected to the dehydration tank 3.

[0040] The vertical end of the intake pipe 902 is designed to be narrower at the top and wider at the bottom. This tapering design allows the airflow to be initially stabilized before entering and injected tangentially into the separation chamber 901 at the optimal angle and speed, thereby obtaining the maximum initial rotational momentum.

[0041] Its gradually narrowing physical shape constrains and guides potentially turbulent airflow carrying foam: the narrow opening at the top helps to gather the airflow and suppress its disorderly diffusion; the gradually widening channel at the bottom allows the airflow to transition smoothly and be guided. This process effectively improves the stability and organization of the airflow itself and reduces turbulent pulsations.

[0042] More importantly, the shaped airflow can be injected tangentially into the separation chamber 901 from the horizontal end at a more consistent angle and higher speed, ensuring that the airflow can obtain the maximum and regular initial rotational momentum the moment it enters the separation chamber 901, thereby quickly and efficiently establishing a strong swirling field.

[0043] The inlet of the air intake pipe 902 is also connected to a metal wire mesh 906. When the airflow carrying mist enters the air intake pipe 902 through the metal wire mesh 906, the porous design of the metal wire mesh 906 provides a rich gas-liquid interface with a huge specific surface area, making it easier for small foams to aggregate and merge into larger droplets when they hit the wire mesh surface. Furthermore, when the foam passes through the narrow, tortuous porous structure, it is subjected to strong shearing and compression, and the foam liquid film is thinned until it ruptures.

[0044] This process pre-converts stable, fine foam that is difficult to separate directly by centrifugal force into droplets that are easier to separate. It can significantly reduce the foam content and foam stability in the airflow entering the subsequent cyclone separator 901, thereby reducing the load on the main separation unit, improving the overall oil-liquid separation efficiency, and further reducing the loss of oil due to foam entrainment.

[0045] It should be noted that a perforated sleeve 907 is also connected inside the intake pipe 902. The perforated sleeve 907 is located at the connection between the intake pipe 902 and the separation chamber 901. The perforated sleeve 907 has a slit 908 inside for connecting the separation chamber 901 and the intake pipe 902. The slit 908 has an arc-shaped structure and a tangential angle that is consistent with the overall rotation direction of the separation chamber 901. When the airflow rushes out from the intake pipe 902, it first hits and is forced to pass through the multiple slits 908 on the perforated sleeve 907. After passing through these holes, the airflow is divided into multiple fine jets with tangential components.

[0046] Before entering the main space of separation chamber 901, these jets already have a preliminary rotational tendency, which breaks up and reorganizes the originally potentially uneven incoming flow, weakens large-scale turbulent pulsations, and makes the airflow participate in the main vortex more smoothly and evenly.

[0047] This allows the airflow to enter the separation chamber 901 in a more stable and uniform manner, thereby enabling the establishment of a strong and orderly main vortex flow in the chamber more quickly and stably. This lays a crucial fluid dynamic foundation for the subsequent efficient gas-liquid separation relying on centrifugal force.

[0048] The separation chamber 901 is also connected to a spiral guide plate 905. The starting point of the guide plate 905 is directly opposite to the starting position of the tangent of the airflow discharged from the intake pipe 902. As the forming track and accelerator of the vortex, the guide plate 905 can immediately guide, consolidate and strengthen the rotational motion of the airflow, thereby improving the start-up speed and overall efficiency of centrifugal separation.

[0049] When the airflow carrying mist is injected tangentially into the separation chamber 901 from the inlet pipe 902, its inlet momentum direction is completely consistent with the initial tangential direction of the spiral guide plate 905.

[0050] The presence of the deflector 905 provides the airflow with a pre-set, continuous spiral trajectory, which forces the airflow to adhere to and flow along the curved surface of the deflector 905 the instant it enters the separation chamber 901, thereby forcibly and rapidly shaping it into a regular and powerful rotating vortex.

[0051] By eliminating the potential diffusion, collision energy loss, or flow field establishment delay that may occur after the airflow enters the open cavity, the spiral guide plate 905 ensures the stability and intensity of the rotating flow field throughout the entire downward path of the separation chamber 901 through continuous guidance and constraint. This allows oil droplets to be continuously subjected to a strong and stable centrifugal force from the inlet, and to be efficiently thrown towards the wall, thereby optimizing the separation process and improving the oil droplet collection efficiency.

[0052] It is worth mentioning that the inner wall of the separation chamber 901 is also provided with grooves 909 distributed from top to bottom. The cross-section of the grooves 909 is triangular, and the grooves 909 are arranged in multiple groups in an equally spaced circular distribution.

[0053] High-speed rotating airflow forms a boundary layer near the smooth wall of separation chamber 901, where the flow velocity and direction may be unstable. However, by setting grooves 909 on the inner wall of separation chamber 901, each groove 909's windward edge will generate a small disturbance to the airflow when the main swirling airflow sweeps along the wall.

[0054] This disturbance induces a series of stable and orderly secondary eddies within and behind the tank. These secondary eddies are carried downward by the main swirling flow, which makes the airflow near the wall rotate more stably and strongly, suppressing the irregular pulsations and oscillations of the main flow. Furthermore, the stable near-wall flow field can more continuously and powerfully press the oil droplets against the wall and prevent the separated fine droplets from being re-entrained into the airflow core.

[0055] In addition, the groove 909 utilizes capillary action and guidance to create a low-resistance, directional drainage channel for the oil on the wall surface.

[0056] When oil droplets are thrown against the wall by centrifugal force, they form a thin liquid film. The sharp edges of the groove 909 generate strong capillary force, which actively draws the nearby liquid film into the groove. In particular, the oil film and small oil droplets dispersed on the wall are continuously gathered into the groove line and quickly merge into a larger liquid flow.

[0057] Furthermore, the triangular cross-section of the groove 909 forms a natural channel path. Gravity will cause the liquid in it to flow quickly and centrally along the direction of the groove to the oil outlet at the bottom, avoiding the liquid from spreading irregularly, stagnating, or being blown away by the airflow on the smooth wall surface.

[0058] On the gas phase side, the slotted windward edge acts as a micro vortex generator, which can stabilize the near-wall rotating flow field, suppress irregular pulsations, thereby enhancing the centrifugal force that continuously presses oil droplets against the wall surface, and effectively preventing the separated fine oil droplets from being re-entrained by the airflow. On the liquid side, the sharp edges of the groove generate strong capillary force, which can actively adsorb and collect the dispersed oil film that impacts the wall, causing it to coalesce into a larger liquid flow within the groove. At the same time, its triangular cross-section forms a natural directional flow channel, allowing the collected oil to flow quickly and centrally along the groove to the bottom drain port under the action of gravity, avoiding spreading, stagnation, or secondary dispersion by airflow on the smooth wall surface.

[0059] Therefore, by stabilizing the separation environment and optimizing the drainage path, the trench 909 improves the final collection efficiency and recovery speed of oil droplets, which directly helps to improve the refining yield and ensure the cleanliness of the subsequent vacuum equipment 6.

[0060] The opening size of the groove 909 gradually decreases from top to bottom, and the depth of the groove 909 gradually becomes shallower from top to bottom, so that the geometric parameters of the groove 909 match the axially varying fluid dynamic conditions in the separation chamber 901, thereby achieving performance optimization throughout the axial height.

[0061] In the upper part of the separation chamber 901, the airflow rotation speed is relatively low, and the centrifugal force is weak. At this time, the deeper and wider grooves 909 can provide stronger capillary convergence and greater liquid capacity, ensuring that even small oil droplets with low kinetic energy can be effectively captured and initiate downward flow. In the lower part of the separation chamber 901, as the cross-section contracts, the airflow rotation speed and centrifugal force increase sharply, and the liquid film has converged into streams.

[0062] At this point, the shallower and narrower groove 909 accelerates the flow rate of the liquid within the groove and uses sharper edges to more thoroughly scrape the wall surface, ensuring that the separated liquid is quickly and completely guided into the bottom drain port, preventing liquid film residue. This gradient design allows the groove 909 to play an optimal role at different axial positions, achieving a combination of strong upper-stage trapping and rapid lower-stage discharge, eliminating potential performance bottlenecks caused by changes in airflow conditions, thereby further improving the overall oil separation efficiency and recovery speed.

[0063] It should be noted that guide vanes 910 are also connected to the inner wall of the separation chamber 901. The guide vanes 910 are arranged in several groups in an equidistant circular pattern below the opening of the exhaust pipe 904. When the rotating and rising airflow hits the inclined guide vanes 910, the tangential rotational momentum of the airflow is blocked by the blade surface and converted into axial momentum.

[0064] The airflow is forced to change direction along the tilt angle of the guide vane 910, thereby reducing the rotation intensity, i.e., the swirling flow, and guiding the airflow to be discharged more smoothly axially. This stabilizes the core flow field, reduces the disordered oscillation of the vortex, and prevents the separated oil droplets from being re-entrained.

[0065] As the final airflow rectification and stabilization device, it forces the rotating airflow into axial flow, completely eliminating the adverse effects of vortices in the separation chamber, thereby ensuring the efficient and pure discharge of the separated gas and blocking the path of oil droplets being entrained a second time.

[0066] By setting radial guide vanes 910 below the exhaust port at the top of the separation chamber 901, the vortex core is stabilized and the gas is guided to be discharged axially. After the main gas-liquid separation is completed, the clean gas forms an upward inner spiral vortex in the center of the separation chamber 901 and converges towards the exhaust port. In this scheme, several guide vanes 910 are evenly distributed around the circumference below the opening of the exhaust pipe 904. When the rotating and rising airflow hits these guide vanes 910, its tangential rotational momentum is effectively blocked and converted into axial momentum. The airflow is forced to change direction and is discharged axially more smoothly.

[0067] The beneficial effect of this innovation is that it can significantly stabilize the low-pressure vortex core in the central region of the separation chamber 901, suppress the disorderly oscillation and rupture of the vortex, thereby blocking the path of the oil droplets that have been thrown towards the wall being re-entrained back to the center of the airflow due to the instability of the core flow field.

[0068] This is equivalent to setting up a rectifier and anti-back-mixing barrier at the last checkpoint of gas discharge, ensuring that the gas entering the vacuum equipment 6 from the exhaust pipe 904 has the highest purity, protecting critical equipment such as the vacuum pump from oil contamination, and reducing maintenance costs and operational risks.

[0069] In summary, the solution in this embodiment solves the problems of oil loss and equipment protection caused by foam during the deodorization process of strong-aroma oils through a series of interconnected and creative mechanical structural designs, including source foam breaking, air intake pretreatment, cyclone-enhanced separation, efficient wall-side flow guidance, and outlet rectification to prevent back mixing. This achieves multiple benefits, including improved yield, stable production, and equipment protection.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A strong-aroma refining machine, comprising a frame (1), and a refining tank (2), a dehydration tank (3), a vacuum device (6), and a filter (7) disposed on the frame (1), wherein the refining tank (2) and the dehydration tank (3) are connected by a conveying pipe (5), and the dehydration tank (3) is connected to the filter (7), characterized in that, An oil separation mechanism (9) is provided between the dehydration tank (3) and the vacuum device (6); The oil separation mechanism (9) includes a separation chamber (901), which is connected to the upper part of the dehydration tank (3) through an air inlet pipe (902) and to the vacuum device (6) through an exhaust pipe (904). The bottom of the separation chamber (901) is provided with an oil drain pipe (903) connected to the dehydration tank (3). The outlet end of the intake pipe (902) is connected along the tangential direction of the separation chamber (901), so that the airflow can enter the interior of the separation chamber (901) tangentially; the cavity of the separation chamber (901) is constructed such that its cross-sectional area gradually decreases from top to bottom, so that the incoming airflow forms an outward swirling flow rotating downward along the cavity wall; the exhaust pipe (904) is arranged along the axis of the separation chamber (901), and its inlet is located in the top central area of ​​the separation chamber (901), which is used to discharge the airflow that gathers and rises towards the center after separation.

2. The strong-aroma refining machine according to claim 1, characterized in that, A metal wire mesh (906) is provided at the inlet of the air intake pipe (902).

3. The strong-aroma refining machine according to claim 1, characterized in that, The air intake pipe (902) has a perforated sleeve (907) on its inner side at the connection with the separation chamber (901). The perforated sleeve (907) has a plurality of slits (908) that connect its inside and outside. The extension direction of the slits (908) has a tangential component that is consistent with the predetermined rotation direction of the airflow in the separation chamber (901).

4. The strong-aroma refining machine according to claim 1, characterized in that, The inner wall of the separation chamber (901) is provided with a spiral guide plate (905), and the starting end of the guide plate (905) is located in the tangential direction of the outlet of the air inlet pipe (902).

5. The strong-aroma refining machine according to claim 1, characterized in that, The inner wall of the separation chamber (901) is provided with multiple grooves (909) along its axial direction.

6. The strong-aroma refining machine according to claim 5, characterized in that, The cross-section of the groove (909) is triangular.

7. A strong-aroma refining machine according to claim 6, characterized in that, The opening width and depth of the groove (909) vary continuously along the axial direction of the separation chamber (901) to match the axially varying fluid dynamic conditions within the separation chamber (901).

8. A strong-aroma refining machine according to claim 1, characterized in that, A plurality of guide vanes (910) are provided below the inlet of the exhaust pipe (904), and the plurality of guide vanes (910) are distributed at intervals around the axis of the separation chamber (901).

9. A strong-aroma refining machine according to claim 1, characterized in that, The inlet section of the intake pipe (902) is constructed such that its cross-sectional area gradually decreases along the airflow direction.

10. A strong-aroma refining machine according to claim 1, characterized in that, Both the refining tank (2) and the dehydration tank (3) are equipped with stirring mechanisms (8).

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