An epoxy soybean oil decolorization device and its usage method

Abstract

The present invention discloses an epoxy soybean oil decolorization device and its usage method, which includes a tank body, an activated carbon mesh plate installed on the inner wall above the tank body for decolorizing epoxy soybean oil, a first cylinder body rotatably connected to the top wall of the tank body through a bearing, a column body connected to the bottom of the first cylinder body and having its bottom end penetrating through the activated carbon mesh plate, a circulation mechanism arranged at the bottom of the column body for the epoxy soybean oil to return to the top of the activated carbon mesh plate again, and a stirring mechanism arranged on the outer side of the column body for accelerating the decolorization of epoxy soybean oil. In the present invention, the spiral rotates inside the second cylinder body, so that the epoxy soybean oil at the bottom of the tank body enters the channel inside the column body through the liquid inlet and is sprayed out through the first nozzle, enabling the epoxy soybean oil to come into contact with the activated carbon mesh plate again. Moreover, the epoxy soybean oil at the bottom of the tank body can be continuously sprayed out through the first nozzle, realizing multiple decolorizations of the epoxy soybean oil, with a better decolorization effect and fundamentally removing pigments.

Description

Technical Field

[0001] The present invention specifically relates to an epoxy soybean oil decolorization device and a method for using the same. Background Art

[0002] Epoxy soybean oil is a kind of organic matter, which is a light yellow viscous oily liquid at room temperature, non-toxic, with a boiling point of 150 °C, soluble in most organic solvents and hydrocarbons, and insoluble in water. It has excellent heat resistance, light resistance and compatibility. It is a widely used plasticizer and stabilizer for polyvinyl chloride, which can significantly improve the thermal and light stability of plastic products. Moreover, epoxy soybean oil has the characteristics of non-toxicity and transparency, and is suitable for being used as a plasticizer for food packaging materials, being environmentally friendly, safe and healthy.

[0003] Epoxy soybean oil is a mixture of fatty acid esters of glycerol, and its main raw materials are soybean oil, organic acid and hydrogen peroxide, which are oxidized under the action of a catalyst. The existing traditional production process of epoxy soybean oil mainly adopts the method of caustic refining and is refined by the low-temperature process with concentrated alkali. Affected by raw materials and processing conditions, in addition to generating the main mixture of glycerol fatty acid esters, the traditional process control conditions will also produce various impurities in varying amounts, such as phospholipids, proteins, pigments, moisture, etc. The existence of these substances will undoubtedly affect the epoxidation reaction and product quality;

[0004] In the traditional process, epoxy soybean oil can only be decolorized once by activated carbon, lye or hydrogen peroxide in the decolorization tank, and the decolorization effect is poor, and pigments cannot be removed fundamentally.

[0005] Therefore, it is very necessary to invent an epoxy soybean oil decolorization device and a method for using the same to solve the above problems. Summary of the Invention

[0006] (1) Object of the Invention

[0007] The object of the present invention is to provide an epoxy soybean oil decolorization device and a method for using the same. In the present invention, the screw rotates inside the second cylinder, so that the epoxy soybean oil at the bottom of the tank enters the channel inside the column through the liquid inlet, and is sprayed out through the first nozzle, so that the epoxy soybean oil comes into contact with the activated carbon mesh plate again, and the epoxy soybean oil at the bottom of the tank can be continuously sprayed out through the first nozzle, realizing multiple decolorization of the epoxy soybean oil, with a better decolorization effect and fundamentally removing pigments, so as to solve the above deficiencies in the technology.

[0008] (2) Technical Solution

[0009] To achieve the above object, the present invention provides the following technical solutions: An epoxy soybean oil decolorization device and its use method, including a tank body, an activated carbon mesh plate installed on the inner wall above the tank body for decolorizing epoxy soybean oil, a first cylinder body rotatably connected to the top wall of the tank body through a bearing, a column body connected to the bottom of the first cylinder body and having its bottom end penetrating through the activated carbon mesh plate, a circulation mechanism provided at the bottom of the column body for returning epoxy soybean oil to the top of the activated carbon mesh plate again, and a stirring mechanism provided outside the column body for accelerating the decolorization of epoxy soybean oil;

[0010] The circulation mechanism includes a second cylinder body rotatably connected to the bottom of the column body through a bearing, a spiral row installed inside the second cylinder body, several channels opened inside the column body, a first spray head installed at the top outlet of the channel, and a driving component installed on the top of the tank body for driving the spiral row to rotate;

[0011] A cleaning mechanism for cleaning the inner wall of the tank body is further provided on the top of the tank body.

[0012] Preferably, the top end of the spiral row is connected to the bottom of the column body, and several of the first spray heads are all arranged above the activated carbon mesh plate.

[0013] Preferably, a liquid inlet is opened on one side of the bottom of the second cylinder body, several support legs are welded to the bottom of the second cylinder body, the bottom ends of the support legs are connected to the bottom wall of the tank body, an oil inlet pipe penetrates through one side of the tank body, a medicine inlet pipe penetrates through the other side of the tank body, the outlet of the oil inlet pipe is arranged above the activated carbon mesh plate, and the outlet of the medicine inlet pipe is arranged below the activated carbon mesh plate.

[0014] Preferably, the driving component includes a servo motor installed on the top of the tank body, a straight gear installed at the top end of the output shaft of the motor, and an annular gear sleeved outside the first cylinder body and meshing with the straight gear.

[0015] Preferably, the stirring mechanism includes several cross bars connected to the outside of the column body, a scraping plate connected to the end of the cross bar away from the column body, and a vertical stirring rod arranged at the bottom of the middle section of the cross bar.

[0016] Preferably, the number of the cross bars is not less than two, and several horizontally distributed stirring rods are welded on both sides of each vertical stirring rod and are arranged in a staggered manner.

[0017] Preferably, the cleaning mechanism includes a bucket body installed on the top of the tank body, a water pump installed on the bottom wall of the bucket body, a connecting pipe installed at the output end of the water pump, and several second spray heads installed at the bottom of the first cylinder body.

[0018] Preferably, a cover plate is rotatably connected to the top of the first cylinder body through a sealed bearing, and one end of the connecting pipe away from the water pump penetrates through the cover plate and extends into the first cylinder body.

[0019] Preferably, an oil discharge pipe is connected to the bottom of the tank body through threads, a ring plate is connected to the top of the oil discharge pipe through threads, and a stainless steel mesh plate is embedded in the ring plate.

[0020] A method for using an epoxy soybean oil decolorization device includes the following steps:

[0021] S1. Preliminary decolorization of epoxy soybean oil: The staff connects the external pipeline for transporting epoxy soybean oil to the oil inlet pipe, and directly injects epoxy soybean oil into the tank body through the oil inlet pipe. The epoxy soybean oil falls and contacts the activated carbon mesh plate, and the pigment molecules in the epoxy soybean oil solution are absorbed by the activated carbon mesh plate, and the solution is decolorized for the first time and falls to the bottom of the tank body;

[0022] S2. Secondary decolorization of epoxy soybean oil: The staff connects the external pipeline for transporting epoxy soybean oil to the medicine inlet pipe, and directly injects an alkali solution or a hydrogen peroxide solution into the tank body through the medicine inlet pipe. The alkali solution or the hydrogen peroxide solution contacts the epoxy soybean oil solution at the bottom of the tank body and merges with each other, thereby performing secondary decolorization;

[0023] S3. Circulating decolorization of epoxy soybean oil: When the epoxy soybean oil solution accumulated at the bottom of the tank body overflows the horizontal stirring rod, the staff starts the servo motor. The output end of the servo motor rotates to drive the spur gear to rotate, further driving the ring gear to rotate, further driving the first cylinder body to rotate, and then driving the column body to rotate, so that the spiral rotates inside the second cylinder body, so that the epoxy soybean oil at the bottom of the tank body enters the second cylinder body through the liquid inlet, and then enters the channel inside the column body through the second cylinder body, and then is sprayed out through the first nozzle, so as to contact the activated carbon mesh plate again, and the epoxy soybean oil at the bottom of the tank body can be continuously sprayed out through the first nozzle, so as to realize multiple decolorization of epoxy soybean oil;

[0024] S4. Accelerated decolorization of epoxy soybean oil: When the column body rotates, the cross bar connected to the column body will also rotate, so that the vertical stirring rod and the horizontal stirring rod rotate, stirring the epoxy soybean oil solution at the bottom of the tank body, accelerating the mixing rate of the epoxy soybean oil solution and the alkali solution or the hydrogen peroxide solution, and further accelerating the decolorization rate of the epoxy soybean oil;

[0025] S5. Discharge and collection of epoxy soybean oil: When the epoxy soybean oil is completely decolorized and meets the standard, the staff opens the oil discharge pipe, and the decolorized epoxy soybean oil can be discharged from the tank body through the oil discharge pipe and collected. The stainless steel mesh plate can filter out the impurities inside the epoxy soybean oil and improve the purity of the epoxy soybean oil;

[0026] S6. Cleaning of the tank body: After all the epoxidized soybean oil is discharged, the staff starts the water pump, injects the cleaning liquid inside the barrel into the first cylinder through the connecting pipe, and then sprays it out through the second nozzle. After passing through the activated carbon mesh plate, it slides down along the inner wall of the tank. At this moment, the scraper rotates along the inner wall of the tank as the cross bar rotates, and with the cooperation of the cleaning liquid, the inner wall of the tank is cleaned. After the cleaning is completed, the drain pipe is opened again to drain the sewage, and then the decolorization process of other non-decolorized epoxidized soybean oil can be started.

[0027] Compared with the prior art, the beneficial effects of the above technical solutions of the present invention are as follows:

[0028] 1. In the present invention, the epoxidized soybean oil is preliminarily decolorized by using an activated carbon mesh plate at the top of the tank body, and alkali liquor or hydrogen peroxide is added through the medicine inlet pipe to decolorize the epoxidized soybean oil dripping at the bottom of the tank body again. Moreover, the vertical stirring rod and the horizontal stirring rod are used to stir the epoxidized soybean oil at the bottom of the tank body, so that it is fully mixed with the alkali liquor or hydrogen peroxide, improving the decolorization rate.

[0029] 2. In the present invention, the spiral row rotates inside the second cylinder, and the epoxidized soybean oil at the bottom of the tank body enters the channel inside the cylinder through the liquid inlet, and is sprayed out through the first nozzle. Moreover, the epoxidized soybean oil at the bottom of the tank body can be continuously sprayed out through the first nozzle, that is, the already decolorized epoxidized soybean oil is conveyed to the top of the activated carbon mesh plate again, contacts and collides with the activated carbon mesh plate, realizes cyclic decolorization, improves the decolorization effect, removes pigments fundamentally, and has a good decolorization effect. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a three-dimensional view of the present invention;

[0033] Figure 3 It is a schematic diagram of the cleaning mechanism of the present invention;

[0034] Figure 4 It is a schematic diagram of the connection structure between the cylinder and the spiral row of the present invention;

[0035] Figure 5 It is a cross-sectional view of the cylinder of the present invention;

[0036] Figure 6 It is a schematic diagram of the connection structure between the drain pipe and the ring plate of the present invention.

[0037] Description of the reference numerals:

[0038] 1 Tank body, 11 Inlet oil pipe, 12 Inlet medicine pipe, 2 Activated carbon mesh plate, 3 First cylinder, 4 Rotating rod, 5 Circulation mechanism, 51 Second cylinder, 511 Liquid inlet, 512 Legs, 52 Screw conveyor, 53 Channel, 54 First spray head, 55 Driving assembly, 551 Servo motor, 552 Straight gear, 553 Ring gear, 6 Stirring mechanism, 61 Cross bar, 62 Scraper, 63 Vertical stirring rod, 64 Horizontal stirring rod, 7 Cleaning mechanism, 71 Barrel body, 72 Water pump, 73 Connecting pipe, 74 Cover plate, 75 Second spray head, 8 Oil discharge pipe, 9 Ring plate, 10 Stainless steel mesh plate. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] The present invention provides an epoxy soybean oil decolorization device as Figure 1-6 shown, including a tank body 1, an activated carbon mesh plate 2 installed on the inner wall above the tank body 1 for decolorizing epoxy soybean oil, a first cylinder 3 rotatably connected to the top wall of the tank body 1 through a bearing, a column 4 connected to the bottom of the first cylinder 3 and having a bottom end penetrating through the activated carbon mesh plate 2, a circulation mechanism 5 provided at the bottom of the column 4 for returning epoxy soybean oil to the top of the activated carbon mesh plate 2 again, and a stirring mechanism 6 provided outside the column 4 for accelerating the decolorization of epoxy soybean oil;

[0041] The circulation mechanism 5 includes a second cylinder 51 rotatably connected to the bottom of the column 4 through a bearing, a screw conveyor 52 installed inside the second cylinder 51, a plurality of channels 53 opened inside the column 4, a first spray head 54 installed at the top outlet of the channel 53, and a driving assembly 55 installed on the top of the tank body 1 for driving the screw conveyor 52 to rotate;

[0042] A cleaning mechanism 7 for cleaning the inner wall of the tank body 1 is further provided on the top of the tank body 1, and the

[0043] Specifically, the output end of the servo motor 551 rotates to drive the ring gear 553 to rotate, thereby driving the first cylinder 3 to rotate, and enabling the screw conveyor 52 to rotate inside the second cylinder 51, so that the epoxy soybean oil at the bottom of the tank body 1 enters the channels 53 inside the column 4 through the liquid inlet 511 and is sprayed out through the first spray head 54, so as to come into contact with the activated carbon mesh plate 2 again, and the epoxy soybean oil at the bottom of the tank body 1 can be continuously sprayed out through the first spray head 54, thereby realizing the multiple decolorization of epoxy soybean oil.

[0044] Further, in the above technical solution, the top end of the spiral row 52 is connected to the bottom of the column body 4, and a plurality of the first nozzles 54 are all arranged above the activated carbon mesh plate 2.

[0045] In this embodiment, the number of the first nozzles 54 is not less than three and is distributed around the first cylinder body 3. When the epoxy soybean oil extracted by the spiral row 52 is sprayed again, it can be directly sprayed onto the activated carbon mesh plate 2 through the first nozzles 54, so as to realize the multiple decolorization of the epoxy soybean oil.

[0046] Further, in the above technical solution, a liquid inlet 511 is opened on one side of the bottom of the second cylinder body 51, a plurality of legs 512 are welded to the bottom of the second cylinder body 51, the bottom ends of the legs 512 are connected to the bottom wall of the tank body 1, an oil inlet pipe 11 penetrates through one side of the tank body 1, a medicine inlet pipe 12 penetrates through the other side of the tank body 1, the outlet of the oil inlet pipe 11 is arranged above the activated carbon mesh plate 2, and the outlet of the medicine inlet pipe 12 is arranged below the activated carbon mesh plate 2.

[0047] In this embodiment, the liquid inlet 511 can enable the epoxy soybean oil to quickly enter the interior of the second cylinder body 51, the legs 512 can ensure the stability of the second cylinder body 51 during use, and the epoxy soybean oil to be decolorized externally can enter the interior of the tank body 1 through the oil inlet pipe 11, and the lye or hydrogen peroxide aqueous solution can enter the interior of the tank body 1 through the liquid inlet pipe. At the same time, in order to prevent the lye or hydrogen peroxide aqueous solution from contacting the activated carbon mesh plate 2, the outlet of the medicine inlet pipe 12 is arranged in the gap area between the cross plate and the activated carbon mesh plate 2.

[0048] Further, in the above technical solution, the driving assembly 55 includes a servo motor 551 installed on the top of the tank body 1, a straight gear 552 installed on the top end of the output shaft of the motor, and an annular gear 553 sleeved on the outer side of the first cylinder body 3 and meshed with the straight gear 552.

[0049] In this embodiment, the output end of the servo motor 551 rotates, drives the annular gear 553 to rotate through the transmission of the straight gear 552, and further provides power for the spiral row 52 to realize the extraction of the epoxy soybean oil, so that the epoxy soybean oil at the bottom of the tank body 1 contacts the activated carbon mesh plate 2 again for decolorization.

[0050] Further, in the above technical solution, the stirring mechanism 6 includes a plurality of cross bars 61 connected to the outer side of the column body 4, a scraper 62 connected to the end of the cross bar 61 far away from the column body 4, and a vertical stirring rod 63 arranged at the bottom of the middle section of the cross bar 61. The number of the cross bars 61 is not less than two, and a plurality of horizontally stirring rods 64 distributed in a staggered manner are welded on both sides of each vertical stirring rod 63.

[0051] In this embodiment, the vertical stirring rod 63 and the horizontal stirring rod 64 rotate to stir the epoxidized soybean oil solution at the bottom of the tank body 1, accelerating the mixing rate of the epoxidized soybean oil solution with the lye or hydrogen peroxide solution. When cleaning the inner wall of the tank body 1, the scraper 62 can scrape off the impurities and residual liquid adhering to the inner wall of the tank body 1.

[0052] Further, in the above technical solution, the cleaning mechanism 7 includes a barrel body 71 installed at the top of the tank body 1, a water pump 72 installed on the bottom wall of the barrel body 71, a connecting pipe 73 installed at the output end of the water pump 72, several second nozzles 75 installed at the bottom of the first cylinder body 3, a cover plate 74 rotatably connected to the top of the first cylinder body 3 through a sealed bearing, and one end of the connecting pipe 73 away from the water pump 72 penetrates through the cover plate 74 and extends into the first cylinder body 3.

[0053] In this embodiment, the cleaning liquid inside the barrel body 71 is sprayed out by the second nozzles 75 after being powered by the water pump 72. The scraper 62 rotates along the inner wall of the tank body 1 as the cross bar 61 rotates, and under the cooperation of the cleaning liquid, the inner wall of the tank body 1 is cleaned. At the same time, in order to further improve the cleaning efficiency of the inner wall of the tank body 1, a heating plate can be arranged inside the barrel body 71 to heat the cleaning liquid, thereby improving the flushing quality.

[0054] Further, in the above technical solution, an oil discharge pipe 8 is connected to the bottom of the tank body 1 by a thread, a ring plate 9 is connected to the top of the oil discharge pipe 8 by a thread, and a stainless steel mesh plate 10 is embedded inside the ring plate 9.

[0055] In this embodiment, the stainless steel mesh plate 10 can filter the impurities inside the epoxidized soybean oil after decolorization, improving the purity of the epoxidized soybean oil. It is connected inside the oil discharge pipe 8 by a thread, and the oil discharge pipe 8 is also connected to the tank body 1 by a thread, so that it is convenient for the staff to directly unscrew the oil discharge pipe 8 for maintenance of the stainless steel mesh plate 10 in the later stage.

[0056] A usage method of an epoxidized soybean oil decolorization device includes the following steps:

[0057] S1. Preliminary decolorization of epoxidized soybean oil: The staff connects the external pipeline for transporting epoxidized soybean oil to the oil inlet pipe 11, and directly injects epoxidized soybean oil into the tank body 1 through the oil inlet pipe 11. The epoxidized soybean oil falls and contacts the activated carbon mesh plate 2. The pigment molecules in the epoxidized soybean oil solution are absorbed by the activated carbon mesh plate 2, and the solution is decolorized for the first time and falls to the bottom of the tank body 1.

[0058] S2. Secondary decolorization of epoxidized soybean oil: The staff connects the external pipeline for transporting epoxidized soybean oil to the medicine inlet pipe 12, and directly injects lye or hydrogen peroxide solution into the tank body 1 through the medicine inlet pipe 12. The lye or hydrogen peroxide solution contacts the epoxidized soybean oil solution at the bottom of the tank body 1 and merges with each other, thereby performing secondary decolorization.

[0059] S3. Recycling and decolorization of epoxidized soybean oil: When the epoxidized soybean oil solution accumulated at the bottom of the tank body 1 overflows the horizontal stirring rod 64, the staff starts the servo motor 551. The output end of the servo motor 551 rotates to drive the spur gear 552 to rotate, further driving the annular gear 553 to rotate, further driving the first cylinder 3 to rotate, and then driving the column 4 to rotate. Thus, the spiral row 52 rotates inside the second cylinder 51, so that the epoxidized soybean oil at the bottom of the tank body 1 enters the inside of the second cylinder 51 through the liquid inlet 511, then enters the channel 53 inside the column 4 through the second cylinder 51, and then is sprayed out through the first nozzle 54, thus contacting the activated carbon mesh plate 2 again. And the epoxidized soybean oil at the bottom of the tank body 1 can be continuously sprayed out through the first nozzle 54, thereby realizing the multiple decolorization of epoxidized soybean oil;

[0060] S4. Accelerated decolorization of epoxidized soybean oil: When the column 4 rotates, the cross bar 61 connected to the column 4 will also rotate accordingly, so that the vertical stirring rod 63 and the horizontal stirring rod 64 rotate, stirring the epoxidized soybean oil solution at the bottom of the tank body 1, accelerating the mixing rate of the epoxidized soybean oil solution with the lye or hydrogen peroxide solution, and thus accelerating the decolorization rate of epoxidized soybean oil;

[0061] S5. Discharge and collection of epoxidized soybean oil: When the epoxidized soybean oil is completely decolorized and meets the standard, the staff opens the drain pipe 8, and the decolorized epoxidized soybean oil can be discharged from the tank body 1 through the drain pipe 8 and collected. And the stainless steel mesh plate 10 can filter out the impurities inside the epoxidized soybean oil, improving the purity of the epoxidized soybean oil;

[0062] S6. Cleaning of the tank body 1: When all the epoxidized soybean oil is discharged, the staff starts the water pump 72, injects the cleaning liquid inside the barrel body 71 into the first cylinder 3 through the connecting pipe 73, and then sprays it out through the second nozzle 75. After passing through the activated carbon mesh plate 2, it slides down along the inner wall of the tank body 1. At this moment, the scraper 62 rotates along the inner wall of the tank body 1 as the cross bar 61 rotates, and with the cooperation of the cleaning liquid, the inner wall of the tank body 1 is cleaned. After the cleaning is completed, the drain pipe 8 is opened again to discharge the sewage, and then the decolorization process of other un-decolorized epoxidized soybean oil can be started.

[0063] Embodiment: When the present invention is in use, an observation window, as well as switches for a servo motor 551 and a water pump 72, can also be installed on the front side of the tank body 1, so as to facilitate the staff to observe the decolorization situation of the epoxidized soybean oil inside the tank body 1 in real time, or to turn on the servo motor 551 and the water pump 72 at any time for use. The staff injects epoxidized soybean oil into the tank body 1 through the oil inlet pipe 11. The epoxidized soybean oil falls and contacts the activated carbon mesh plate 2. After the first decolorization, it falls to the bottom of the tank body 1. At this time, an alkali solution or a hydrogen peroxide solution is injected into the tank body 1 through the chemical inlet pipe 12. The alkali solution or the hydrogen peroxide solution contacts the epoxidized soybean oil solution at the bottom of the tank body 1 and merges with each other for secondary decolorization. When the epoxidized soybean oil solution accumulated at the bottom of the tank body 1 overflows the horizontal stirring rod 64, the staff starts the servo motor 551. The spiral row 52 conveys the epoxidized soybean oil at the bottom of the tank body 1 into the channel 53 and sprays it out through the first nozzle 54, and contacts the activated carbon mesh plate 2 again to realize multiple decolorizations of the epoxidized soybean oil. And when the vertical stirring rod 63 and the horizontal stirring rod 64 rotate, the decolorization rate of the epoxidized soybean oil can be accelerated. After the epoxidized soybean oil is completely decolorized, it is directly discharged and collected through the oil discharge pipe 8 to complete the decolorization process;

[0064] This embodiment specifically solves the problem in the prior art that in the current traditional process, the epoxidized soybean oil can only be decolorized once by activated carbon, an alkali solution or hydrogen peroxide in the decolorization tank, and the decolorization effect is poor, and the pigment cannot be removed fundamentally.

[0065] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An epoxy soybean oil decolorization device, characterized in that: it includes a tank body (1), an activated carbon mesh plate (2) installed on the inner wall above the tank body (1) for decolorizing epoxy soybean oil, a first cylinder body (3) rotatably connected to the top wall of the tank body (1) through a bearing, a column body (4) connected to the bottom of the first cylinder body (3) and with its bottom end penetrating through the activated carbon mesh plate (2), a circulation mechanism (5) arranged at the bottom of the column body (4) for the epoxy soybean oil to return to the top of the activated carbon mesh plate (2) again, and a stirring mechanism (6) arranged outside the column body (4) to accelerate the decolorization of epoxy soybean oil; The circulation mechanism (5) includes a second cylinder body (51) rotatably connected to the bottom of the column body (4) through a bearing, a spiral row (52) installed inside the second cylinder body (51), a plurality of channels (53) opened inside the column body (4), a first spray head (54) installed at the top outlet of the channel (53), and a driving component (55) installed on the top of the tank body (1) for driving the spiral row (52) to rotate; A cleaning mechanism (7) for cleaning the inner wall of the tank body (1) is further arranged on the top of the tank body (1); A liquid inlet (511) is opened on one side of the bottom of the second cylinder body (51), a plurality of support legs (512) are welded to the bottom of the second cylinder body (51), the bottom ends of the support legs (512) are connected to the bottom wall of the tank body (1), an oil inlet pipe (11) penetrates through one side of the tank body (1), a medicine inlet pipe (12) penetrates through the other side of the tank body (1), the outlet of the oil inlet pipe (11) is arranged above the activated carbon mesh plate (2), and the outlet of the medicine inlet pipe (12) is arranged below the activated carbon mesh plate (2).

2. The epoxy soybean oil decolorization device according to claim 1, characterized in that: the top end of the spiral row (52) is connected to the bottom of the column body (4), and a plurality of the first spray heads (54) are all arranged above the activated carbon mesh plate (2).

3. The epoxy soybean oil decolorization device according to claim 1, characterized in that: the driving component (55) includes a servo motor (551) installed on the top of the tank body (1), a straight gear (552) installed at the top end of the motor output shaft, and an annular gear (553) sleeved outside the first cylinder body (3) and meshed with the straight gear (552).

4. The epoxy soybean oil decolorization device according to claim 1, characterized in that: the stirring mechanism (6) includes a plurality of cross bars (61) connected to the outside of the column body (4), a scraping plate (62) connected to the end of the cross bar (61) far from the column body (4), and a vertical stirring rod (63) arranged at the bottom of the middle section of the cross bar (61).

5. The epoxy soybean oil decolorization device according to claim 4, characterized in that: the number of the cross bars (61) is not less than two, and a plurality of horizontally distributed stirring rods (64) are welded on both sides of each vertical stirring rod (63) and are distributed in a staggered manner.

6. The epoxy soybean oil decolorization device according to claim 1, characterized in that: The cleaning mechanism (7) includes a barrel body (71) installed at the top of the tank body (1), a water pump (72) installed on the bottom wall of the barrel body (71), and a connecting pipe (73) installed at the output end of the water pump (72). A plurality of second nozzles (75) are installed at the bottom of the first cylinder body (3).

7. An epoxy soybean oil decolorization device according to claim 6, characterized in that: A cover plate (74) is rotatably connected to the top of the first cylinder body (3) through a sealed bearing. One end of the connecting pipe (73) away from the water pump (72) penetrates through the cover plate (74) and extends into the first cylinder body (3).

8. An epoxy soybean oil decolorization device according to claim 1, characterized in that: An oil discharge pipe (8) is connected to the bottom of the tank body (1) by means of threads. A ring plate (9) is connected to the top of the oil discharge pipe (8) by means of threads. A stainless steel mesh plate (10) is embedded inside the ring plate (9).

9. A method for using an epoxy soybean oil decolorization device according to any one of claims 1-8, characterized in that: It includes the following steps: S1. Preliminary decolorization of epoxy soybean oil: The staff connects the external pipeline for transporting epoxy soybean oil to the oil inlet pipe (11), and directly injects epoxy soybean oil into the tank body (1) through the oil inlet pipe (11). The epoxy soybean oil falls and contacts the activated carbon mesh plate (2). The pigment molecules in the epoxy soybean oil solution are absorbed by the activated carbon mesh plate (2), and the solution is decolorized for the first time and falls to the bottom of the tank body (1); S2. Secondary decolorization of epoxy soybean oil: The staff connects the external pipeline for transporting epoxy soybean oil to the medicine inlet pipe (12), and directly injects an alkali solution or a hydrogen peroxide solution into the tank body (1) through the medicine inlet pipe (12). The alkali solution or hydrogen peroxide solution contacts the epoxy soybean oil solution at the bottom of the tank body (1) and merges with each other, thereby performing secondary decolorization; S3. Circulating decolorization of epoxy soybean oil: When the epoxy soybean oil solution accumulated at the bottom of the tank body (1) overflows the horizontal stirring rod (64), the staff starts the servo motor (551). The output end of the servo motor (551) rotates to drive the spur gear (552) to rotate, further driving the ring gear (553) to rotate, further driving the first cylinder body (3) to rotate, and then driving the column body (4) to rotate, so that the spiral row (52) rotates inside the second cylinder body (51), so that the epoxy soybean oil at the bottom of the tank body (1) enters the second cylinder body (51) through the liquid inlet (511), and then enters the channel (53) inside the column body (4) through the second cylinder body (51), and then is sprayed out through the first nozzle (54), so as to contact the activated carbon mesh plate (2) again, and the epoxy soybean oil at the bottom of the tank body (1) can be continuously sprayed out through the first nozzle (54), thereby realizing multiple decolorization of epoxy soybean oil; S4. Accelerated decolorization of epoxidized soybean oil: When the column body (4) rotates, the cross bar (61) connected to the column body (4) will also rotate accordingly, so that the vertical stirring rod (63) and the horizontal stirring rod (64) rotate, stirring the epoxidized soybean oil solution at the bottom of the tank body (1), accelerating the mixing rate of the epoxidized soybean oil solution with the lye or hydrogen peroxide solution, and thus accelerating the decolorization rate of the epoxidized soybean oil; S5. Discharge and collection of epoxidized soybean oil: When the epoxidized soybean oil is completely decolorized and meets the standard, the staff opens the drain pipe (8), and the decolorized epoxidized soybean oil can be discharged from the tank body (1) through the drain pipe (8) and collected. Moreover, the stainless steel mesh plate (10) can filter out the impurities inside the epoxidized soybean oil, improving the purity of the epoxidized soybean oil; S6. Cleaning of the tank body (1): After all the epoxidized soybean oil is discharged, the staff starts the water pump (72), injects the cleaning liquid inside the barrel body (71) into the first cylinder body (3) through the connecting pipe (73), and then sprays it out through the second nozzle (75). After passing through the activated carbon mesh plate (2), it slides down along the inner wall of the tank body (1). At this moment, the scraper (62) rotates along the inner wall of the tank body (1) as the cross bar (61) rotates, and with the cooperation of the cleaning liquid, the inner wall of the tank body (1) is cleaned. After the cleaning is completed, the drain pipe (8) is opened again to discharge the sewage, and then the decolorization process of other un-decolorized epoxidized soybean oil can be started.

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