Edible oil decoloring device with filtering function

Abstract

The utility model discloses a kind of edible oil decoloring device with filtering function, it is related to edible oil processing technical field, comprising: assembly frame;Decoloring tank body, by tank body support installation in assembly frame inner top, for edible oil is mixed with decoloring agent and is stirred;Shunt pipeline, set in decoloring tank body bottom end;Filtering assembly, set in assembly frame inner bottom both sides, filtering assembly top and the output end of shunt pipeline keep connection, filtering assembly top one side is provided with limit component;Nitrogen cylinder, set in assembly frame inner bottom one side, for into nitrogen in decoloring tank body;Water storage bottle, set with assembly frame inner bottom other side, for decoloring tank body input constant-temperature heat source, to realize temperature control.The utility model uses shunt pipeline and parallel double filtering assembly, support unilateral maintenance when other side continuous operation, solve the shutdown problem of traditional single-channel filtration, realize integrated multi-channel filtration system realizes efficient continuous production.

Description

Technical Field

[0001] This utility model relates to the field of edible oil processing technology, and more specifically, to an edible oil decolorization device with filtration function. Background Technology

[0002] In the refining process of edible oils, decolorization is a crucial step, primarily used to remove pigments, residual phospholipids, soaps, and some heavy metal ions, thereby improving the oil's transparency and stability. Traditional decolorization processes typically use activated clay or activated carbon as adsorbents, which are thoroughly mixed with the oil under heating conditions before filtration. Edible oils include flaxseed oil, rapeseed oil, soybean oil, and others.

[0003] For example, sesame oil is rich in unsaturated fatty acids, but its natural pigments give it a dark color, affecting its sensory quality and shelf-life stability. Decolorization is a crucial step in sesame oil refining. Traditional processes use activated clay to adsorb pigments, but this carries risks such as high oxidation. During decolorization, exposure to air allows oxygen in the tank to react with the activated clay, accelerating the oxidation of unsaturated fatty acids and generating peroxides, leading to rancidity and reduced nutritional value. Temperature control is also unstable; the optimal decolorization temperature for sesame oil is 80-100℃. Existing equipment often relies on water baths for temperature control, using water as the heat transfer medium. This water-based system has a temperature limit of 100℃ or less, making it difficult to precisely match process requirements and resulting in large temperature fluctuations that affect adsorption efficiency.

[0004] However, the existing technology has the following prominent problems, such as low temperature control accuracy, the decolorization reaction is sensitive to temperature, but the temperature control of most equipment fluctuates greatly, affecting the consistency of the reaction; easy oxidation and deterioration, at high temperatures, oils are easily oxidized when in contact with air, producing peroxides and odors, reducing the quality of oils; low filtration efficiency and inconvenient maintenance: traditional filtration devices are mostly single-channel, fixed filter element structures, and the operation of replacing the filter screen is complicated and there is a risk of leakage.

[0005] For example, application number CN221701456U discloses an edible oil filtration and decolorization device, including a tank. An oil inlet pipe is connected to the left side of the upper surface of the tank, and a decolorizing agent inflow pipe is connected to the left side of the tank and to the left of the oil inlet pipe. A discharge structure is connected to the lower surface of the tank, and a filter mechanism is provided at the bottom of the discharge structure for easy unclogging and replacement of the filter screen inside the filtration and decolorization device. While this device facilitates unclogging and replacement of the filter screen, it only has one filter screen at the discharge port. Replacement requires stopping the entire device and ensuring that no more edible oil flows into the filter screen from inside the tank, resulting in low processing efficiency.

[0006] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0007] In view of the problems in the related technologies, this utility model proposes an edible oil decolorization device with filtration function to overcome the above-mentioned technical problems existing in the existing related technologies.

[0008] Therefore, the specific technical solution adopted by this utility model is as follows: An edible oil decolorization device with filtration function includes: an assembly frame; a decolorization tank, installed on the top of the assembly frame via a tank support, for stirring and mixing edible oil and a decolorizing agent; a distribution pipe, located at the bottom of the decolorization tank; a filter assembly, located on both sides of the bottom of the assembly frame, with the top of the filter assembly connected to the output end of the distribution pipe, and a limit component provided on one side of the top of the filter assembly; a nitrogen cylinder, located on one side of the bottom of the assembly frame, for introducing nitrogen into the decolorization tank; and a water storage bottle, located on the other side of the bottom of the assembly frame, for inputting a constant-temperature heat source into the decolorization tank to achieve temperature control.

[0009] Furthermore, in order to fully mix the edible oil and decolorizing agent by utilizing the stirring shaft inside the double-walled tank, the decolorizing tank includes a double-walled tank set inside the tank support. A stirring motor is installed at the center of the top of the double-walled tank, and the output end of the stirring motor is connected to the stirring shaft. An oil inlet is provided on one side of the top of the double-walled tank, and an exhaust port is provided on the other side of the top of the double-walled tank.

[0010] Furthermore, in order to improve heating efficiency by accurately and stably controlling the temperature of the edible oil in the decolorization tank and ensuring that the decolorization reaction is carried out within the optimal process temperature range, the bottom side of the hollow interlayer inside the double-walled tank is connected to the water storage bottle through a warm water pipe, and a water outlet is provided on the top side of the hollow interlayer inside the double-walled tank, with a temperature sensor installed at the top of the warm water pipe.

[0011] Furthermore, in order to establish and maintain an inert gas environment during the decolorization process, isolate oxygen to prevent edible oil from oxidizing and becoming rancid at high temperatures, and ensure the quality and stability of the oil, the bottom of the double-walled tank is connected to the nitrogen cylinder through a nitrogen filling pipe.

[0012] Furthermore, in order to optimize the internal space layout of the equipment, enhance the support stability of key components, ensure the overall structure of the equipment is stable and reliable, and facilitate maintenance and operation, support base plates are set at the bottom two opposite corners of the assembly frame, and columns are set at the top of the support base plates; bottle supports are set at the other two opposite corners of the assembly frame, and the bottle supports are respectively matched with water storage bottles and nitrogen cylinders.

[0013] Furthermore, in order to achieve efficient solid-liquid separation of the decolorized oil, ensure filtration effect, simplify the filter material replacement and maintenance process, and ensure operational safety, the filter assembly includes a filter box set at the top of the support base plate. The filter box has multiple equally spaced slide rails on both sides of its interior side walls, with a filter plate between two slide rails. The bottom of the filter box has a conical structure and an oil outlet is opened at the center. A door is provided on one side of the filter box and is locked in place.

[0014] Furthermore, to provide reliable door locking during filter assembly operation, prevent accidental door opening leading to oil leakage or safety accidents, and ensure quick and safe unlocking and locking during maintenance operations, thereby improving equipment safety and ease of operation, the limiting component includes a fixed base located at the top of the filter box near the door. The fixed base is equipped with connecting rods and remains in a movable connection. Limit rods are located at the bottom of the two connecting rods. A crossbar is located at the top of the limit rod, and a handle is located on the side of the door at the top of the crossbar. The crossbar and the limit rods are fixedly connected on both sides by pins.

[0015] The beneficial effects of this utility model are as follows: 1. By assembling a diagonally symmetrical frame structure, the decolorization tank, dual filter components, nitrogen cylinder, and water storage bottle are modularly integrated, reducing the equipment footprint. The dual filter components are connected in parallel through a diversion pipeline, allowing the other side to continue operating while one side is being maintained. This solves the downtime problem of traditional single-channel filtration and enables efficient and continuous production through an integrated multi-channel filtration system.

[0016] 2. Constant-temperature hot water is introduced through the double-layer tank jacket, and the temperature sensor monitors the inlet water temperature in real time to achieve precise temperature control, ensuring that the edible oil reacts in the optimal decolorization temperature range, thereby improving adsorption efficiency. The entire process is protected by nitrogen, with nitrogen introduced from the bottom of the tank through a nitrogen filling pipe, replacing the air from bottom to top to reduce the residual oxygen in the tank, inhibiting the oxidation of unsaturated fatty acids, and realizing a temperature and nitrogen synergistic control system to improve the quality and stability of edible oil.

[0017] 3. Through the mechanical transmission of the limiting component, the limiting rod is driven to engage with the handle groove of the box, forming a pressure-resistant physical lock to prevent the risk of high-pressure oil leakage. The mechanical linkage locking mechanism ensures safe operation and convenient operation. Attached Figure Description

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

[0019] Figure 1This is a schematic diagram of a edible oil decolorizing device with filtration function according to an embodiment of the present utility model; Figure 2 This is a side view of an edible oil decolorizing device with filtration function according to an embodiment of the present utility model; Figure 3 This is a partially enlarged view of the filter assembly of an edible oil decolorizing device with filtration function according to an embodiment of the present utility model; Figure 4 This is a partial cross-sectional view of the internal structure of the decolorizing tank of an edible oil decolorizing device with filtration function according to an embodiment of the present utility model. Figure 5 This is a partial cross-sectional view of the internal structure of a filter assembly of an edible oil decolorizing device with filtration function according to an embodiment of the present utility model. Figure 6 This is a schematic diagram of the assembly frame structure of an edible oil decolorizing device with filtration function according to an embodiment of the present utility model.

[0020] In the picture: 1. Assembly frame; 2. Decolorizing tank; 201. Double-layer tank; 202. Stirring motor; 203. Stirring shaft; 204. Oil inlet; 205. Exhaust port; 3. Tank support; 4. Diversion pipe; 5. Filter assembly; 501. Filter box; 502. Slide rail; 503. Filter plate; 504. Oil outlet; 505. Door; 6. Limiting assembly; 601. Fixing base; 602. Connecting rod; 603. Limiting rod; 604. Crossbar; 605. Handle; 606. Pin; 7. Nitrogen cylinder; 8. Water storage bottle; 9. Warm water pipe; 10. Water outlet; 11. Temperature sensor; 12. Nitrogen filling pipe; 13. Support base plate; 14. Column; 15. Bottle support. Detailed Implementation

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0022] According to an embodiment of the present invention, an edible oil decolorization device with filtration function is provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-6As shown, the edible oil decolorizing device with filtration function according to an embodiment of the present invention includes: an assembly frame 1; a decolorizing tank 2, which is installed at the top of the assembly frame 1 via a tank support 3, for stirring and mixing edible oil and decolorizing agent; a diversion pipe 4, which is located at the bottom of the decolorizing tank 2; a filter assembly 5, which is located on both sides of the bottom of the assembly frame 1, with the top of the filter assembly 5 connected to the output end of the diversion pipe 4, and a limit component 6 provided on one side of the top of the filter assembly 5; a nitrogen cylinder 7, which is located on one side of the bottom of the assembly frame 1, for introducing nitrogen into the decolorizing tank 2; and a water storage bottle 8, which is located on the other side of the bottom of the assembly frame 1, for inputting a constant-temperature heat source into the decolorizing tank 2 to achieve temperature control.

[0024] By utilizing the above technical solutions, the decolorization tank 2, dual filter components 5, nitrogen cylinder 7, and water storage bottle 8 are modularly integrated through the diagonal symmetrical structure of the assembly frame 1, reducing the equipment footprint. The dual filter components 5 are connected in parallel via a diversion pipe 4, allowing the other side to continue operating while one side is being maintained, thus solving the downtime problem of traditional single-channel filtration and realizing efficient and continuous production through an integrated multi-channel filtration system.

[0025] It should be noted that this device is controlled by an electronic controller, which can be integrated or used as a computer or smart terminal. The electronic controller has a built-in PLC module and can be configured with components such as a touch screen and a speaker to display temperature and oxygen concentration data in real time. The controller controls the stirring motor 202, solenoid valve, temperature sensor 11, circulating water pump, and other actuators via communication connections.

[0026] In one embodiment, the decolorizing tank 2 includes a double-layered tank 201 disposed inside the tank support 3. A stirring motor 202 is disposed at the center of the top of the double-layered tank 201, and the output end of the stirring motor 202 is connected to a stirring shaft 203. An oil inlet 204 is disposed on one side of the top of the double-layered tank 201, and an exhaust port 205 is disposed on the other side of the top of the double-layered tank 201, so that the edible oil and the decolorizing agent are fully stirred and mixed by the stirring shaft 203 inside the double-layered tank 201.

[0027] In one embodiment, for the aforementioned double-layer tank 201, the bottom side of the hollow interlayer inside the double-layer tank 201 is connected to the water storage bottle 8 through a warm water pipe 9, and a water outlet 10 is provided on the top side of the hollow interlayer inside the double-layer tank 201. A temperature sensor 11 is provided on the top of the warm water pipe 9, thereby improving the heating efficiency by accurately and stably controlling the temperature of the edible oil in the decolorization tank 2 and ensuring that the decolorization reaction is carried out within the optimal process temperature range.

[0028] It should be noted that a heating rod is installed inside the water storage bottle 8, and a circulating water pump should be installed at the circular end of the warm water pipe. The outlet of the circulating water pump is connected to the bottom of the double-layer tank 201 through the warm water pipe 9. The temperature sensor 11 feeds back the water temperature to the electronic controller in real time, which is used to dynamically adjust the power of the heating rod to control the water temperature fluctuation. A feasible implementation is that the water outlet 10 at the top of the interlayer can be connected back to the water storage bottle 8 through the return pipe to form a closed loop.

[0029] It should be noted that a solenoid valve is installed at the bifurcation point of the diversion pipe 4. The valve body is electrically connected to the electronic controller. When stirring, it is set to be closed on both sides. After the stirring reaction is complete, the electronic controller circuit connects to the solenoid valve to open the valve and allow the oil to flow into the filter assembly 5.

[0030] In one embodiment, for the double-walled tank 201, the bottom of the double-walled tank 201 is connected to the nitrogen cylinder 7 through a nitrogen filling pipe 12, thereby establishing and maintaining an inert gas environment during the decolorization process, isolating oxygen to prevent edible oil from oxidizing and becoming rancid at high temperatures, and ensuring the quality and stability of the oil.

[0031] It should be noted that, depending on the actual application scenario, a pressure reducing valve and a solenoid valve can be installed at the outlet of the nitrogen cylinder 7. These are connected to the gas pipe at the bottom of the double-walled tank 201 via the nitrogen filling pipe 12, allowing nitrogen to diffuse evenly from bottom to top. An oxygen concentration sensor is installed at the exhaust port 205. When the detected value is >1%, the electronic controller circuit connects to control the vacuum pump installed on the nitrogen pipe to increase the nitrogen flow rate, ensuring that the residual oxygen level remains low.

[0032] In one embodiment, for the assembly frame 1, a support base plate 13 is provided at each of the two opposite corners of the bottom of the assembly frame 1, and a column 14 is provided at the top of each of the support base plates 13; a bottle bracket 15 is provided at the other two opposite corners of the assembly frame 1, and the bottle bracket 15 cooperates with the water storage bottle 8 and the nitrogen bottle 7 respectively, thereby optimizing the internal space layout of the equipment, enhancing the support stability of key components, ensuring the overall structure of the equipment is stable and reliable, and facilitating maintenance and operation.

[0033] In one embodiment, the filter assembly 5 includes a filter box 501 disposed at the top of the support base plate 13. The filter box 501 has multiple equally spaced slide rails 502 on both sides of its interior, and a filter plate 503 is disposed between two slide rails 502. The bottom of the filter box 501 has a conical structure and an oil outlet 504 is provided at the center. A door 505 is provided on one side of the filter box 501 and is locked in place, thereby achieving efficient solid-liquid separation of the decolorized oil, ensuring filtration effect, simplifying the filter material replacement and maintenance process, and ensuring operational safety.

[0034] It should be noted that the cross-section of slide rail 502 is concave (e.g., Figure 5As mentioned above, the filter plate 503 is embedded in the sliding groove on both sides, for example, the groove depth is set to 8mm and the fitting gap is 0.2mm; a limit stop can be set at the end of the slide rail to prevent the filter plate from being pulled out excessively. During maintenance, the filter plate can be pulled outward in the horizontal direction to disengage from the slide rail. The filter plate 503 is set as a three-layer filter screen plate with different pore sizes.

[0035] In one embodiment, the limiting component 6 includes a fixed base 601 located at the top of the filter box 501 near the door 505. The fixed base 601 is provided with connecting rods 602 and is movably connected. Limiting rods 603 are provided at the bottom ends of the two connecting rods 602. A crossbar 604 is provided at the top of the limiting rod 603. A handle 605 is provided on the side of the door 505 and at the top of the crossbar 604. The crossbar 604 and both sides of the limiting rod 603 are fixedly connected by pins 606, thereby providing reliable door locking during the operation of the filter assembly 5, preventing accidental opening of the door 505 that could lead to oil leakage or safety accidents, and ensuring quick and safe unlocking and locking during maintenance operations, thus improving the safety and ease of operation of the equipment.

[0036] Working principle of limiting component 6: The front of the filter box 501 is provided with an openable door 505. The assembly frame 1 is fixedly connected to the outside of the filter box 501. Horizontal bar grooves are symmetrically arranged on both sides of the assembly frame near the door 505. The horizontal bar 604 is slidably connected to the door pin groove in the vertical direction and has a protrusion at its top. The filter box handle 605 is fixed to the outside of the door 505, and its bottom end has a groove for the protrusion to be inserted. The connecting rod 602 is horizontally rotatably connected to the fixed seat 601 at the top of the filter box through a rotating shaft. One end of the connecting rod 602 is provided with a limiting rod 603 that provides a horizontal support plane. The connecting rod 602 is horizontally rotatably connected to the fixed seat 601 at the top of the filter box through a rotating shaft. One end of the limiting rod 603 has a horizontal support plane. The plane, the limiting rod 603 and the connecting rod 604 are respectively provided with vertical through holes for the filter device pin 606 to pass through vertically. When the protrusion at the top of the crossbar 604 is engaged in the groove at the bottom of the filter device handle 605, and the horizontal support plane limiting rod 603 of the connecting rod 602 is located directly below the crossbar 604, the filter device pin 606 can be inserted into the vertical through hole to fix the two and close the filter box door 505. When it is necessary to clean or replace the filter screen, first pull the pin 606 upward, rotate the connecting rod 602 in the opposite direction to move the support plane limiting rod 603 away, and then pull the crossbar 604 downward along the crossbar slide groove to release the engagement between the connecting rod 604 and the filter device handle 605, so that the filter door can be opened and the filter plate 503 can be pulled out horizontally for cleaning or replacement.

[0037] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0038] In practical application, the operator first injects the edible oil to be decolorized and the decolorizing agent into the double-walled tank 201 through the oil inlet 204, and simultaneously starts the valve of the nitrogen cylinder 7, allowing nitrogen to continuously flow in from the bottom of the tank through the nitrogen filling pipe 12. The nitrogen displaces the air in the tank from bottom to top due to the density difference, and the residual oxygen is discharged through the exhaust port 205, establishing a low-oxygen-concentration inert environment. Then, the stirring motor 202 is started, driving the stirring shaft 203 to rotate, so as to achieve full mixing of materials. At the same time, the constant temperature water circulation system of the water storage bottle 8 is turned on, and hot water is pumped into the bottom of the tank jacket through the warm water pipe 9. The water temperature is monitored in real time through the temperature sensor 11 to control and maintain the optimal decolorization reaction temperature. After decolorization is completed, the operator opens the valve of the diversion pipe 4 to switch the oil flow direction. The oil flows through the filter plate 503 inside the filter assembly 5, where the solid decolorizing agent is intercepted, and the clear oil flows out from the oil outlet 504 through the bottom of the conical tank.

[0039] In summary, by utilizing the above-mentioned technical solution of this utility model, the decolorization tank 2, dual filter assembly 5, nitrogen cylinder 7, and water storage bottle 8 are modularly integrated through the diagonally symmetrical structure of the assembly frame 1, reducing the equipment footprint. The parallel connection of the dual filter assembly 5 via the diversion pipe 4 allows for continuous operation of the other side during maintenance on one side, solving the downtime problem of traditional single-channel filtration and achieving efficient continuous production through an integrated multi-channel filtration system. Furthermore, constant-temperature hot water is introduced through the double-layer tank 201 jacket, and the temperature sensor 11 monitors the inlet water temperature in real time to achieve precise temperature control. To ensure the edible oil reacts within the optimal decolorization temperature range and improve adsorption efficiency, a nitrogen protection system is implemented throughout the entire process. Nitrogen is introduced from the bottom of the tank through the nitrogen filling pipe 12, replacing the air from bottom to top to reduce the residual oxygen content in the tank and inhibit the oxidation of unsaturated fatty acids. This temperature and nitrogen synergistic control system enhances the stability of edible oil quality. Through the mechanical transmission of the limiting component 6, the limiting rod 603 is driven to lift the crossbar 604 and engage it in the groove of the handle 605, forming a pressure-resistant physical lock to prevent the risk of high-pressure oil leakage. This mechanical linkage locking mechanism ensures operational safety and ease of use.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An edible oil decolorization device with filtration function, characterized in that, include: Assembly frame (1); The decolorizing tank (2) is installed on the top of the assembly frame (1) via the tank support (3) for stirring and mixing edible oil and decolorizing agent; A diversion pipe (4) is provided at the bottom end of the decolorization tank (2); A filter assembly (5) is disposed on both sides of the bottom of the assembly frame (1). The top of the filter assembly (5) is connected to the output end of the diversion pipe (4). A limit component (6) is provided on one side of the top of the filter assembly (5). A nitrogen cylinder (7) is located on one side of the bottom inside the assembly frame (1) for introducing nitrogen into the decolorizing tank (2); A water storage bottle (8) is set on the other side of the bottom of the assembly frame (1) for the input of a constant-temperature heat source into the decolorizing tank (2) to achieve temperature control.

2. The edible oil decolorizing device with filtration function according to claim 1, characterized in that, The decolorization tank (2) includes a double-layer tank (201) disposed inside the tank support (3). A stirring motor (202) is disposed at the center of the top of the double-layer tank (201), and a stirring shaft (203) is connected to the output end of the stirring motor (202). An oil inlet (204) is provided on one side of the top of the double-layer tank (201), and an exhaust port (205) is provided on the other side of the top of the double-layer tank (201).

3. The edible oil decolorizing device with filtration function according to claim 2, characterized in that, The bottom side of the hollow interlayer inside the double-layer tank (201) is connected to the water storage bottle (8) through a warm water pipe (9). A water outlet (10) is provided on the top side of the hollow interlayer inside the double-layer tank (201), and a temperature sensor (11) is provided on the top of the warm water pipe (9).

4. An edible oil decolorizing device with a filtration function according to claim 2 or 3, characterized in that, The bottom of the double-walled tank (201) is connected to the nitrogen cylinder (7) via a nitrogen filling pipe (12).

5. The edible oil decolorizing device with filtration function according to claim 1, characterized in that, The assembly frame (1) has a support base plate (13) at each of the two opposite corners of the bottom, and a column (14) is provided at the top of each support base plate (13). The assembly frame (1) has two additional diagonal bottle supports (15) inside, which are respectively matched with the water storage bottle (8) and the nitrogen bottle (7).

6. The edible oil decolorizing device with filtration function according to claim 5, characterized in that, The filter assembly (5) includes a filter box (501) disposed at the top of the support base plate (13). Both sides of the filter box (501) are provided with multiple equally spaced slide rails (502), and a filter plate (503) is disposed between two slide rails (502). The bottom of the filter box (501) is conical and an oil outlet (504) is provided at the center. The filter box (501) has a door (505) on one side, which is locked in place.

7. The edible oil decolorizing device with filtration function according to claim 6, characterized in that, The limiting component (6) includes a fixed seat (601) disposed on the top of the filter box (501) near the side of the box door (505). The fixed seat (601) is provided with connecting rods (602) and is kept in a movable connection. The bottom ends of the two connecting rods (602) are provided with limiting rods (603). A crossbar (604) is provided at the top of the limiting rod (603), and a handle (605) is provided on one side of the box door (505) and at the top of the crossbar (604). The crossbar (604) and the limiting bar (603) are fixedly connected on both sides by pins (606).

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