Plant edible oil decolorization equipment

Abstract

This invention discloses a vegetable oil decolorization device, comprising an outer tank and an inner tank built inside therein, with a sandwich layer between the outer and inner tanks. The sandwich layer houses a heating assembly surrounding the outer side of the inner tank and a lifting assembly. The lifting assembly includes a gas storage chamber fixedly located on the upper part of the inner tank, with an air inlet hole penetrating the inner tank at its bottom. A sliding top plate is installed inside the gas storage chamber. An inflation support assembly is installed between the lower end of the top plate and the bottom plate of the gas storage chamber, controlling the lifting and lowering of the top plate. Multiple sealed holes are located on the top of the gas storage chamber, and an airtight component is installed on the top of the chamber corresponding to each sealed hole. A control rod extending into the inner tank is located at the lower center of the top plate, with an oil storage chamber fixedly located at the lower end of the control rod. A sliding partition plate is also installed around the outside of the oil storage chamber. A conveying hose leading to the outside of the outer tank is installed at the lower part of the oil storage chamber.

Description

Technical Field

[0001] This invention relates to the field of edible oil processing equipment technology, specifically to a vegetable edible oil decolorization device. Background Technology

[0002] Decolorization is one of the four core processes in oil refining. It mainly removes natural pigments such as chlorophyll and carotenoids, while also removing trace amounts of soap particles, residual phospholipids, metal ions, oil peroxides, and some polycyclic aromatic hydrocarbons. This improves the stability of the oil and prevents it from turning black or reverting to its original color under the high temperature of subsequent deodorization.

[0003] The decolorization of vegetable oil typically involves adding activated clay and activated carbon in a specific ratio to the produced edible vegetable oil and heating it under vacuum to adsorb excess pigments. Existing technology, such as patent application number CN202420300598.5, discloses a vegetable oil decolorization device. This device includes a piston-like component in the oil storage tank to simultaneously stir and improve the fluidity of the vegetable oil. However, since the main method for decolorizing vegetable oil involves adsorbing and mixing the pigments with activated clay and activated carbon, improving the flow efficiency of the vegetable oil can easily further break down the solid structure of the activated clay and activated carbon, completely mixing them into the vegetable oil. This can negatively impact the health benefits of edible oil and requires further solid-liquid separation. Therefore, there is an urgent need to address the filtration issues in the decolorization process of edible vegetable oil to improve the overall processing speed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vegetable edible oil decolorization device to solve the problem of low solid-liquid separation efficiency in the prior art.

[0005] The objective of this invention is achieved through the following technical solution: a vegetable oil decolorization device, comprising an outer tank and an inner tank built inside therein, wherein a sandwich layer is provided between the outer tank and the inner tank, and a heating assembly is built into the sandwich layer surrounding the outer side of the inner tank. The device also includes a lifting assembly, which includes a gas storage chamber fixedly disposed on the upper part of the inner tank, and an air inlet hole penetrating the inner tank is opened at the bottom of the gas storage chamber. A top plate that can slide up and down is provided inside the gas storage chamber, and the lower end of the top plate is flush with the bottom of the gas storage chamber. An inflatable support assembly is provided between the plates, which controls the lifting and lowering of the top plate. The top of the air storage chamber has multiple sealed holes, and an airtight component is provided on the top of the air storage chamber corresponding to each sealed hole. The airtight component controls the opening and closing of the sealed hole. A control rod is provided in the middle of the lower end of the top plate, extending through into the inner tank. An oil storage chamber is fixedly provided at the lower end of the control rod. A partition plate that can slide up and down is also provided around the outside of the oil storage chamber. A conveying hose leading to the outside of the outer tank is provided at the lower part of the oil storage chamber.

[0006] Preferably, the inflatable support assembly includes an inflatable airbag, the upper and lower ends of which abut against the top plate and the bottom of the air storage cavity, respectively, and both are sealed. A telescopic rod perpendicular to the bottom surface of the air storage cavity is provided inside the inflatable airbag, and a first spring is arranged around the outside of the telescopic rod. The inflatable airbag is filled with inert gas.

[0007] Preferably, the airtight assembly includes an air storage cover disposed below the sealing hole, wherein a stop rod corresponding to the sealing hole is slidably embedded in the middle of the lower end face of the air storage cover, and the upper part of the stop rod has a plug for blocking the sealing hole.

[0008] Preferably, the airtight assembly further includes a clamping block disposed on the side adjacent to the gas storage hood. The clamping block has an opening facing downward and a connecting rod is axially connected to the clamping part of the clamping block. A clamping piece is disposed at the other end of the connecting rod. A pulley is clamped in the middle of the clamping piece. A gasket is disposed in the middle of the connecting rod body. The gasket is disposed corresponding to the bottom of the abutment rod. During the swinging process of the connecting rod, the abutment rod is embedded in the sealing hole by the gasket abutting the abutment rod.

[0009] Preferably, the oil storage cavity includes an installation part and an oil storage part that are separated into upper and lower parts. The oil storage part is hollow inside and has a filter screen structure on the outer circumference. The installation part has concave arc-shaped installation grooves on both sides. A limiting rod for installing a partition plate is provided in the installation groove. A second spring is arranged around the limiting rod.

[0010] Preferably, the partition plate has an annular structure with a limiting ring protruding from the center of its inner side. The limiting ring is sleeved on the limiting rod and placed below the second spring. The partition plate controls the opening and sealing of the oil storage section by sliding the limiting ring up and down on the limiting rod.

[0011] Preferably, the partition plate has multiple vertically connected oil filter ports on its surface, and a stirring blade is axially connected inside each oil filter port. Filter screens are laid on the upper and lower ends of each oil filter port.

[0012] Preferably, the bottom of the outer tank is provided with an inlet that leads to the cavity of the inner tank, and the bottom of the outer tank is also provided with an outlet that leads to the cavity of the inner tank. The outlet is connected to the same port of the conveying hose for output.

[0013] Preferably, the conveying hose includes an input end and an output end. The input end of the conveying hose is conductively connected to the oil storage chamber, and the output end is connected to the discharge port. The conveying hose has a corrugated pipe structure.

[0014] The present invention has the following advantages: 1. By utilizing the vacuum and heating state required in the decolorization process of vegetable oil, during the preheating and degassing process, the heating wire increases the activity of the inert gas in the inflatable airbag, causing the airbag to gradually expand and lift the top plate. During the lifting of the top plate, the oil storage chamber and the partition plate are driven to rise by the control rod. During the rise, the partition plate blocks the oil storage part of the oil storage chamber to prevent oil from overflowing. The oil can flow up and down on the partition plate through the oil filter port, but the adsorbed solids are always at the bottom of the partition plate, improving the flow and mixing efficiency. 2. The top plate rises, and the pulleys on the top plate drive the connecting rod to lift the bottom rod, sealing the sealing hole and keeping the internal space of the inner tank hollow and sealed. After heating stops, the top plate remains stationary. As the temperature gradually decreases, the inert gas in the airbag loses its activity, and the top plate gradually descends. Due to the buoyancy of the grease, the partition plate cannot continue to descend. However, after the push rod disengages from the sealing hole, the external air pressure is greater than the air pressure inside the inner tank, creating a pressure difference. Air is drawn in through the sealing hole, generating negative pressure inside the tank. The air flows into the inner tank, causing the pressure to cause the top plate to continue to descend. During the descent, the partition plate rises under the buoyancy of the oil, unfolding to block the oil storage section. The oil enters the oil storage section and is discharged through the conveying hose. The adsorbed solids are isolated outside the oil storage section and placed under the partition plate and the oil storage chamber. After solid-liquid separation is completed, the adsorbed residue is gathered and pressed into a cake by gas purging and the pressure of the partition plate and the oil storage chamber, completing the separation and collection. The entire equipment does not use the output of the main power source during operation. It uses the pressure difference characteristics to complete the stirring, separation and collection work, further improving the working efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the inner tank structure of the device of the present invention; Figure 3 This is a schematic cross-sectional view of the inner tank of the device of the present invention; Figure 4 for Figure 3 A partial structural diagram of A in the middle; Figure 5 for Figure 3 A schematic diagram of the partial structure of B in the diagram.

[0016] In the diagram: 1. Outer tank; 101. Inlet; 102. Outlet; 2. Inner tank; 3. Air storage chamber; 301. Sealing hole; 302. Air inlet; 303. Air storage cover; 304. Support rod; 305. Clamping block; 306. Connecting rod; 307. Pulley; 308. Gasket; 4. Top plate; 401. Inflatable airbag; 402. Telescopic rod; 403. First spring; 404. Control rod; 5. Oil storage chamber; 501. Mounting part; 502. Oil storage part; 503. Conveying hose; 504. Mounting groove; 505. Limiting rod; 506. Second spring; 6. Divider plate; 601. Oil filter port; 602. Stirring blade; 603. Limiting ring; 7. Heating assembly. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0020] Example 1:

[0021] This embodiment discloses a specific assembly structure for a vegetable oil decolorization device, which serves as the basic implementation structure for the device.

[0022] Combination Figure 1 , 23. The main body of the equipment includes an outer tank 1 and an inner tank 2 nested inside the outer tank 1. The outer tank 1 and the inner tank 2 are coaxially arranged, and an annular sealed interlayer is formed between their side walls and bottom. A heating component 7 is fixedly installed inside the interlayer, surrounding the outer wall of the inner tank 2. In this embodiment, the heating component 7 is an electric heating wire. The electric heating wire is evenly distributed inside the interlayer through an insulating fixing seat, and the outside of the electric heating wire is wrapped with a high-temperature resistant insulating sealing sleeve. Both the upper and lower ends of the interlayer are sealed with high-temperature resistant sealing gaskets and locked with flanges to prevent the vacuum environment inside the tank from being destroyed, and at the same time to prevent heat loss during the heating process, ensuring the constant temperature heating conditions required for oil decolorization.

[0023] Combination Figure 2 , 3 The inner tank 2 has a fixedly installed air storage chamber 3 with a lifting assembly. The air storage chamber 3 is a circular, sealed cavity structure. Multiple air inlets 302 are evenly distributed at the bottom of the air storage chamber 3, penetrating the interior of the inner tank 2, to facilitate airflow between the air storage chamber 3 and the inner tank 2. Inside the air storage chamber 3, there is a circular top plate 4 that can slide up and down along the vertical direction of the cavity. The outer wall of the top plate 4 is nested with an annular wear-resistant sealing ring, which slides tightly against the inner wall of the air storage chamber 3 to ensure airtightness during sliding and prevent airflow leakage.

[0024] Combination Figure 3 An inflatable support assembly is installed between the top plate 4 and the bottom plate of the air storage chamber 3. The inflatable support assembly includes an inflatable airbag 401, which is made of high-temperature resistant, oil-resistant, and corrosion-resistant rubber. The upper and lower ends of the inflatable airbag 401 are fixedly and sealed to the lower end of the top plate 4 and the bottom plate of the air storage chamber 3 through sealing plates, respectively, to completely prevent leakage of inert gas inside the airbag. A telescopic rod 402 is vertically installed inside the inflatable airbag 401. The top plate 4 is fixed to the top end of the telescopic rod 402, and the bottom plate of the air storage chamber 3 is fixed to the bottom end. A first spring 403 is wrapped around the outside of the telescopic rod 402. The upper and lower ends of the first spring 403 abut against the top plate 4 and the bottom plate of the air storage chamber 3, respectively. Under normal conditions, the first spring 403 is in a slightly compressed state, which provides stable support for the top plate 4 and prevents the top plate 4 from shifting or getting stuck. The inflatable airbag 401 is pre-filled with high-purity nitrogen as an inert gas. Nitrogen is chemically stable, does not decompose at high temperatures, and does not react with oils or decolorizing agents, making it suitable for vacuum heating decolorization conditions.

[0025] Combination Figure 4The top plate of the gas storage chamber 3 has multiple circular sealed holes 301 evenly distributed. Each sealed hole 301 is equipped with a set of airtight components below it to realize automatic opening and closing control of the sealed hole 301. The airtight components include a gas storage cover 303 fixed to the inner top wall of the gas storage chamber 3 and covering the lower part of the sealed hole 301. The gas storage cover 303 has an inverted structure. A vertically arranged abutment rod 304 is slidably embedded in the center of the lower end face of the gas storage cover 303. The top of the abutment rod 304 is integrally formed with a plug. The size of the plug matches the diameter of the sealed hole 301, which can completely seal the sealed hole 301 to achieve airtight sealing.

[0026] Combination Figure 3 , 4 A downward-facing clamping block 305 is fixedly installed on one side of the gas storage hood 303. The clamping part of the clamping block 305 is connected to a swingable connecting rod 306 via a pin. A clamping plate is fixedly installed at the end of the connecting rod 306 away from the clamping block 305. A pulley 307 is fixedly clamped in the middle of the clamping plate. The top of the pulley 307 is set against the lower end face of the top plate 4 and can roll with the top plate 4 as it rises and falls. A circular gasket 308 is integrally formed in the middle of the connecting rod 306. The gasket 308 is set opposite to the bottom end face of the abutment rod 304. When the top plate 4 rises and presses against the pulley 307, the connecting rod 306 swings upward around the pin axis, pushing the abutment rod 304 upward through the gasket 308, so that the top plug is inserted into the sealing hole 301 to complete the sealing. When the top plate 4 falls and disengages from the pulley 307, the connecting rod 306 returns to its original position, the abutment rod 304 slides down naturally, and the plug disengages from the sealing hole 301, realizing the opening of the hole.

[0027] Combination Figure 3 A control rod 404 is vertically fixed at the center of the lower end face of the top plate 4. The bottom end of the control rod 404 extends through the air inlet 302 of the air storage chamber 3 into the inner tank 2. A sliding sealing sleeve is nested between the control rod 404 and the wall of the air inlet 302 to ensure sliding airtightness while reducing frictional resistance. The lower end of the control rod 404 is fixedly connected to the oil storage chamber 5. The oil storage chamber 5 is divided into an upper mounting part 501 and a lower oil storage part 502. The two are integrally formed and internally connected. The oil storage part 502 is a hollow cylindrical structure with a perforated filter screen structure, which can achieve oil permeability and solid decolorizing agent retention.

[0028] The mounting section 501 has symmetrically recessed arc-shaped mounting grooves 504 on both sides. Each arc-shaped mounting groove 504 has a horizontally fixed limit rod 505, and a second spring 506 is sleeved around the outside of the limit rod 505. An annular partition plate 6 that can slide up and down is provided on the outside of the oil storage cavity 5. A limit ring 603 is integrally formed in the middle of the inner side of the partition plate 6. The limit ring 603 is slidably sleeved on the limit rod 505, and the limit ring 603 normally abuts against the lower end of the second spring 506. The partition plate 6 can slide vertically up and down along the limit rod 505 through the limit ring 603 to open and seal the top opening of the oil storage section 502. The second spring 506 provides a reset buffer force for the sliding of the partition plate 6 to avoid structural damage caused by sliding impact.

[0029] Multiple oil filter ports 601 are evenly distributed on the partition plate 6. Each oil filter port 601 is connected to a freely rotating stirring blade 602 by a micro pin shaft. The upper and lower ends of the oil filter port 601 are attached to a filter screen. The filter screen has a pore size smaller than that of activated clay and activated carbon particles, which can completely trap solid decolorization residue while ensuring smooth flow of oil.

[0030] The bottom of the outer tank 1 is provided with an inlet 101 and an outlet 102. Both the inlet 101 and the outlet 102 are connected to the inner tank 2 cavity through the interlayer. The inlet 101 is used to add the oil to be decolorized and the decolorizing agent, and the outlet 102 is used to discharge the oil after decolorization. The bottom end of the oil storage chamber 5, the oil storage part 502, is connected to the conveying hose 503. The conveying hose 503 adopts a high temperature and oil-resistant corrugated pipe structure and can freely extend and retract with the oil storage chamber 5. The input end of the conveying hose 503 is sealed and connected to the oil storage part 502, and the output end passes through the inner tank 2 and the outer tank 1 and is coaxially connected to the outlet 102 to realize the directional discharge of oil. All docking positions are sealed by sealing flanges and sealing gaskets to prevent oil leakage and air pressure leakage.

[0031] Example 2: Based on the equipment structure of Example 1, this embodiment discloses a complete operating process of a vegetable edible oil decolorization device. The device relies on the pressure difference under vacuum heating and the thermal expansion and contraction characteristics of inert gas to automatically complete the entire decolorization process of oil stirring and mixing, pigment adsorption, solid-liquid separation, and residue collection without the need for additional power.

[0032] Close the discharge port 102, and inject the vegetable edible oil to be decolorized into the inner tank through the feed port 101 at the bottom of the outer tank 1. Add activated clay and activated carbon decolorizing agents according to the process ratio. After the feeding is completed, close the feed port 101, and evacuate the inner tank 2 to form a vacuum decolorization environment. At the same time, start the heating component 7 inside the jacket, and preheat the inner tank 2 evenly through the electric heating wire to stabilize the temperature inside the tank within the optimal temperature range for oil decolorization.

[0033] As the heating component 7 continues to heat up, the inert nitrogen gas inside the inflatable bladder 401 of the gas storage chamber 3 gradually becomes more active due to the temperature. The bladder expands due to the heat, overcoming the preload of the first spring 403 and pushing the top plate 4 upward, causing the top plate 4 to slide smoothly upward along the inner wall of the gas storage chamber 3. During the upward movement of the top plate 4, the bottom control rod 404, the oil storage chamber 5, and the outer partition plate 6 are simultaneously displaced upward as a whole. In the initial stage of the rise, the partition plate 6, under the elastic force of the second spring 506 and the structural limiting effect, completely seals the opening of the oil storage section 502 of the oil storage chamber 5, preventing oil from seeping into the oil storage section 502 of the tank and causing overflow. The oil can flow through the oil filter port 601 on the partition plate 6 to achieve vertical convection. During the flow of the oil, it impacts the stirring blade 602 inside the oil filter port 601, causing the stirring blade 602 to rotate autonomously. This allows for all-round stirring and mixing of the oil, activated clay, and activated carbon, which greatly improves the pigment adsorption efficiency. At the same time, the partition plate 6 retains the solid decolorizing agent at the bottom of the plate, preventing the solid particles from being excessively crushed and refined.

[0034] When the top plate 4 continues to rise to its maximum stroke, the lower end face of the top plate 4 presses against the pulley 307 of the airtight component, forcing the connecting rod 306 to swing upward around the pin of the clamping block 305. The middle gasket 308 of the connecting rod 306 pushes the abutment rod 304 upward, so that the plug at the top of the abutment rod 304 is precisely embedded in the sealing hole 301, completely sealing all the sealing holes 301 at the top of the gas storage chamber 3, achieving complete sealing of the internal cavity of the inner tank 2, and maintaining a vacuum constant temperature environment inside the tank. At this time, the heating component 7 maintains a constant temperature state, and the grease and decolorizing agent fully contact and react, adsorbing and removing pigments such as chlorophyll and carotenoids in the grease, while removing impurities such as trace soap particles, residual phospholipids, metal ions, grease peroxides, and polycyclic aromatic hydrocarbons, completing the grease decolorization and refining process.

[0035] After pigment adsorption is complete, heating component 7 is turned off, stopping heating of inner tank 2. The internal temperature of the tank gradually decreases naturally. The nitrogen inside the inflatable bladder 401 loses heat and its activity decreases, causing the bladder to contract and the top plate 4 to lose its upward support. At this time, inner tank 2 is still in a sealed vacuum state, with external atmospheric pressure greater than internal pressure, forming a stable pressure difference. Simultaneously, the grease inside the tank generates buoyancy, creating an upward lifting force on the partition plate 6, keeping it temporarily stationary. The top plate 4 slowly descends as the bladder contracts.

[0036] After the top plate 4 continues to descend and disengages from the pulley 307 limit, the connecting rod 306 loses its top pressure and naturally resets. The stop rod 304 slides down with gravity, the plug disengages from the sealing hole 301, and external air rushes into the inner tank 2 through the sealing hole 301, breaking the vacuum environment inside the tank. The air pressure difference further drives the top plate 4 to descend rapidly. During the descent of the top plate 4, the control rod 404 drives the oil storage chamber 5 to move continuously downward. Under the buoyancy of the grease, the partition plate 6 slides upward relative to the oil storage chamber 5, fully opening the opening of the oil storage section 502. The clean grease that has been decolorized inside the inner tank 2 enters the oil storage chamber 5 through the oil filter port 601 of the partition plate 6 and the filter screen of the oil storage section 502, and is then discharged from the equipment through the discharge port 102 via the conveying hose 503. During this process, the activated clay and activated carbon adsorption residue are completely isolated below the partition plate 6 and outside the oil storage chamber 5, achieving complete solid-liquid separation without the need for subsequent manual secondary filtration.

[0037] After the grease is completely discharged, air continuously enters through the sealed hole 301 to form an airflow that sweeps and gathers the solid residue below the partition plate 6. At the same time, the top plate 4 drives the oil storage chamber 5 and the partition plate 6 to continuously press down, compacting the scattered adsorbed residue into a cake shape for easy collection and cleaning later. After the residue treatment is completed, all structures of the equipment return to their initial state under the reset action of the first spring 403 and the second spring 506, and can enter the next round of grease decolorization operation cycle.

[0038] This equipment relies entirely on the principle of thermal expansion and contraction of inert gas and the characteristics of air pressure difference to complete the automated operation. It does not require additional power sources such as motors and stirring pumps, effectively solving the problems of traditional equipment such as easy crushing of decolorizing solids, incomplete solid-liquid separation, and low processing efficiency. It greatly improves the decolorization quality and processing efficiency of edible oils, while ensuring the safety of oils for consumption.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vegetable oil decolorization device, comprising an outer tank (1) and an inner tank (2) built therein, wherein a sandwich layer is provided between the outer tank (1) and the inner tank (2), and a heating assembly (7) is built into the sandwich layer surrounding the outside of the inner tank (2), characterized in that: It also includes a lifting assembly, which includes an air storage chamber (3) fixedly installed on the upper part of the inner tank (2), and the bottom of the air storage chamber (3) has an air inlet (302) that penetrates the inner tank (2). A top plate (4) that can slide up and down is provided inside the air storage chamber (3). An inflation support assembly is provided between the lower end of the top plate (4) and the bottom plate of the air storage chamber (3). The inflation support assembly controls the lifting and lowering of the top plate (4). Multiple sealed holes (301) are opened on the top of the air storage chamber (3). Each sealed hole (301) on the top of the cavity is provided with an airtight component, which controls the opening and closing of the sealed hole (301). A control rod (404) extending through to the inner tank (2) is provided at the middle of the lower end of the top plate (4). An oil storage chamber (5) is fixedly provided at the lower end of the control rod (404). A partition plate (6) that can slide up and down is also provided around the outside of the oil storage chamber (5). A conveying hose (503) that leads to the outside of the outer tank (1) is provided at the lower part of the oil storage chamber (5).

2. The vegetable edible oil decolorization equipment according to claim 1, characterized in that: The inflatable support assembly includes an inflatable airbag (401), the upper and lower ends of which abut against the bottom of the top plate (4) and the air storage cavity (3) respectively, and both are sealed. The inflatable airbag (401) is provided with a telescopic rod (402) perpendicular to the bottom surface of the air storage cavity (3), and a first spring (403) is arranged around the outside of the telescopic rod (402). The inflatable airbag (401) is filled with inert gas.

3. The vegetable edible oil decolorization equipment according to claim 1, characterized in that: The airtight assembly includes an air storage cover (303) covering the lower part of the sealing hole (301). A push rod (304) corresponding to the sealing hole (301) is slidably embedded in the middle of the lower end face of the air storage cover (303). The upper part of the push rod (304) has a plug for blocking the sealing hole (301).

4. The vegetable edible oil decolorization equipment according to claim 3, characterized in that: The airtight assembly also includes a clamping block (305) disposed on the side adjacent to the air storage hood (303). The clamping block (305) has an opening facing downwards and a connecting rod (306) is axially connected to the clamping part of the clamping block (305). A clamping piece is disposed at the other end of the connecting rod (306). A pulley (307) is clamped in the middle of the clamping piece. A gasket (308) is disposed in the middle of the connecting rod (306). The gasket (308) is disposed corresponding to the bottom of the abutment rod (304). During the swinging process, the connecting rod (306) abuts against the abutment rod (304) through the gasket (308) and is embedded in the sealed hole (301).

5. The vegetable edible oil decolorization equipment according to claim 1, characterized in that: The oil storage chamber (5) includes an installation part (501) and an oil storage part (502) that are separated into upper and lower parts. The oil storage part (502) is hollow inside and the outer circumference is a filter screen structure. The installation part (501) has concave arc-shaped installation grooves (504) on both sides. A limiting rod (505) for installing the partition plate (6) is provided in the installation groove (504). A second spring (506) is arranged around the limiting rod (505).

6. The vegetable edible oil decolorization equipment according to claim 5, characterized in that: The partition plate (6) is a ring structure. A limiting ring (603) protrudes from the middle of the inner side of the partition plate (6). The limiting ring (603) is sleeved on the limiting rod (505) and placed below the second spring (506). The partition plate (6) controls the opening and sealing of the oil storage part (502) by sliding the limiting ring (603) up and down on the limiting rod (505).

7. The vegetable edible oil decolorization equipment according to claim 6, characterized in that: The partition plate (6) has multiple oil filter ports (601) that are open at the top and bottom. A stirring blade (602) is connected to the inside of the oil filter port (601). A filter screen is laid on the upper and lower ends of the oil filter port (601).

8. The vegetable edible oil decolorization equipment according to claim 1, characterized in that: The bottom of the outer tank (1) is provided with an inlet (101) that leads to the cavity of the inner tank (2), and the bottom of the outer tank (1) is also provided with an outlet (102) that leads to the cavity of the inner tank (2). The outlet (102) is connected to the same port of the conveying hose (503).

9. A vegetable oil decolorization device according to claim 8, characterized in that: The material conveying hose (503) includes an input end and an output end. The input end of the material conveying hose (503) is connected to the oil storage chamber (5), and the output end is connected to the discharge port (102) at the same port. The material conveying hose (503) has a corrugated pipe structure.

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