Device and method for purifying high-purity glycol ether

Abstract

The invention belongs to the technical field of high-purity glycol ether purification, and particularly relates to a high-purity glycol ether purification device and method. The device comprises a gasification tank and a filter, an arc-shaped ring surface is arranged on the side wall of the filter, a transmission case is mounted on the outer wall of the filter, the output end of the transmission case is connected with a filtering assembly, and a partition plate is mounted in the filter and divides the filter into a filtering cavity and a material distribution cavity. A motor is arranged in a transmission box to drive a filter plate to rotate clockwise, at the moment, a top plate and a bottom plate are fixed, first filter holes are in a communicated state, the filter plate is disengaged from making contact with a baffle, and a filter cavity communicates with a material distribution cavity; along with rotation of the filter plate, glycol ether enters the gasification tank through a first filter hole in the left side of the filter plate, and impurities on the left side of the filter plate move towards a second filter hole in the right side of the filter plate under impact of a solution, so that the impurities enter the material distribution cavity, and the situation that the impurities block the interior of the first filter hole, liquid passing resistance is increased, and even flowing is completely blocked is avoided.

Description

Technical Field

[0001] This invention belongs to the field of high-purity ethylene glycol ethyl ether purification technology, specifically relating to a high-purity ethylene glycol ethyl ether purification device and method. Background Technology

[0002] High-purity ethylene glycol ethyl ether is a commonly used solvent widely applied in coatings, cleaning agents, inks, and other fields. It possesses good solubility and chemical stability, typically exists in liquid form, and exhibits low volatility and good hydrophilicity. Under specific temperature and pressure conditions, ethylene glycol reacts with alcohol compounds to produce ethylene glycol ethyl ether; the reaction is usually carried out in the presence of a catalyst to increase the reaction rate. After the reaction is complete, the product needs to be purified by distillation to remove unreacted raw materials and byproducts, obtaining high-purity ethylene glycol ethyl ether.

[0003] Before purifying ethylene glycol ethyl ether, it needs to be pretreated. The purpose of pretreatment is twofold: first, to remove peroxides from the ethylene glycol ethyl ether raw material using ferrous sulfate solution, so as to avoid the peroxides from reacting with ethylene glycol ethyl ether during distillation and generating various byproducts; second, to remove solid particles and suspended matter remaining in the ethylene glycol ethyl ether using a filter.

[0004] Ferrous sulfate reacts with peroxides to form ferric hydroxide precipitate. Solid particles, suspended matter, and ferric hydroxide precipitate in ethylene glycol ethyl ether are filtered together by the filter. Because the ferric hydroxide precipitate is small in size and has a compact structure, its tiny particles can easily clog the pores of the filter media, causing increased resistance to liquid flow or even completely blocking the flow. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-purity ethylene glycol ethyl ether purification device and method, thereby solving the technical problems in the prior art.

[0006] The objective of this invention can be achieved through the following technical solution: a high-purity ethylene glycol ethyl ether purification device, comprising a vaporization tank and a liquid inlet and an exhaust port mounted on the vaporization tank, the liquid inlet being connected to a filter flange, an inlet being installed on the top of the filter, an arc-shaped annular surface being provided on the side wall of the filter, a transmission box being installed on the outer wall of the filter, the output end of the transmission box being connected to a filter assembly, the filter assembly being located inside the arc-shaped annular surface, a partition being installed inside the filter, the partition dividing the filter into a filtration chamber and a dispensing chamber, the liquid inlet being connected to the filtration chamber; the filter assembly The system includes a filter plate, a top plate, and a bottom plate. The top and bottom plates form an irregularly shaped plate. One filter hole is opened on one side of the filter plate, and another filter hole is opened on the other side. The bottom plate is attached to the bottom of the filter plate, and the pressure supply component on the bottom plate is inserted into the first filter hole on the filter plate. The top plate is attached to the top of the filter plate, and the suction component on the top plate is inserted into the second filter hole on the filter plate. Both the bottom and top plates have through holes, which are staggered from the first and second filter holes. A longitudinal groove is opened inside the partition plate, and a baffle is slidably installed in the longitudinal groove. The baffle is connected to the inner wall of the longitudinal groove by a spring and is attached to the filter plate.

[0007] As a further optimization or improvement of this solution, the pressure supply component includes a cone head. When the base plate is attached to the bottom of the filter plate, the filter hole is blocked by the base plate. At the same time, the cone head is inserted into the filter hole from the bottom. A sliding groove is provided on the base plate, which is connected to the cone head. A push head is slidably installed on the sliding groove. The outer side of the push head is attached to the inner wall of the arc-shaped annular surface. A connecting rod is installed on the inner side of the push head, and a pressure supply plug is fixedly installed on the connecting rod. As the filter plate and the base plate rotate, under the action of the push head and the arc-shaped annular surface, the push head pushes the pressure supply plug to move, and the pressure supply plug pushes the gas inside the cone head to be discharged from the cone head.

[0008] As a further optimization or improvement of this solution, the suction assembly includes a second cone head. When the top plate is attached to the top of the filter plate, the second cone head is inserted into the second filter hole. A second sliding groove is opened on the top plate, and a second pusher head is slidably installed on the second sliding groove. The outer side of the second pusher head is attached to the inner wall of the arc-shaped annular surface, and a second connecting rod is installed on the inner side of the second pusher head. A negative pressure plug is fixedly installed on the second connecting rod. As the filter plate and the bottom plate rotate, under the action of the second pusher head and the arc-shaped annular surface, the second pusher head pushes the negative pressure plug to move, and the second cone head generates negative pressure and adsorbs impurities inside the second filter hole.

[0009] As a further optimization or improvement to this solution, the arc-shaped surface of the arc-shaped torus has a convex center.

[0010] As a further optimization or improvement of this solution, a perforation is provided on the top plate, and the baffle passes through the perforation to fit the filter plate.

[0011] As a further optimization or improvement to this solution, a sealing ring is installed on the outer side of the filter plate, and the sealing ring fits against the inner wall of the arc-shaped annular surface.

[0012] A method for purifying high-purity ethylene glycol ethyl ether, the method being applied to the high-purity ethylene glycol ethyl ether purification apparatus described above, the method comprising the following steps: Step S1: Mix the ethylene glycol ethyl ether stock solution with the ferrous sulfate solution and add it to the filter chamber through the inlet. After standing for a period of time, the ferric hydroxide precipitate and impurities in the stock solution will be deposited on one side of the filter plate. Step S2: The motor inside the transmission box drives the filter plate to rotate clockwise, the filter hole is in the connected state, the filter plate is disengaged from the baffle, and the filter chamber is connected to the material distribution chamber. Step S3: As the filter plate rotates, ethylene glycol ethyl ether enters the gasification tank through the filter hole one on one side of the filter plate, while impurities on one side of the filter plate move towards the filter hole two on the other side of the filter plate under the impact of the solution, causing the impurities to enter the distribution chamber. Step S4: After the ethylene glycol ether inside the filter chamber is drained, the transmission box drives the filter plate to reset, that is, the transmission box drives the filter plate to rotate counterclockwise. The filter plate moves closer to the top plate. As the filter plate rotates, the top plate presses down on the impurities on the other side of the filter plate, accelerating the drainage of liquid through the filter holes.

[0013] The beneficial effects of this invention are: (1) The transmission box of the present invention has a built-in motor that drives the filter plate to rotate clockwise. At this time, the top plate and the bottom plate are fixed, the filter hole one is in a connected state, the filter plate is separated from the baffle, and the filter chamber is connected to the distribution chamber. As the filter plate rotates, ethylene glycol ethyl ether enters the gasification tank through the filter hole one on the left side of the filter plate, while the impurities on the left side of the filter plate move towards the filter hole two on the right side of the filter plate under the impact of the solution, so that the impurities enter the distribution chamber, thereby avoiding the impurities from clogging inside the filter hole one, causing the liquid to pass through to increase resistance, or even completely blocking the flow.

[0014] (2) When the ethylene glycol ether inside the filter chamber is drained, the transmission box drives the filter plate to reset, that is, the transmission box drives the filter plate to rotate counterclockwise. The filter plate moves closer to the top plate. As the filter plate rotates, the top plate presses down the impurities on the right side of the filter plate, accelerating the drainage of the filter hole and preventing liquid accumulation in the distribution chamber.

[0015] (3) When the filter plate of the present invention is reset, the transmission box drives the filter plate, the top plate and the bottom plate to rotate counterclockwise in sync. Under the action of the push head two and the arc-shaped ring surface, the push head two pushes the negative pressure plug to move through the connecting rod two. As the negative pressure plug moves, the cone head two generates negative pressure. The cone head two adsorbs the sticky impurities inside the filter hole two and sucks out the sticky impurities inside the filter hole two, thus avoiding the clogging of the filter hole two. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of the filter.

[0019] Figure 3 This is a schematic diagram of the internal structure of the filter.

[0020] Figure 4 This is a front view of the internal structure of the filter.

[0021] Figure 5 This is a schematic diagram of the slotted hole structure.

[0022] Figure 6 This is a diagram showing the fit between the filter plate, the bottom plate, and the top plate.

[0023] Figure 7 This is a schematic diagram of the initial state of the present invention.

[0024] Figure 8 for Figure 7 Enlarged view of the structure of part A.

[0025] Figure 9 This is a schematic diagram of the pressure supply component and the material suction component.

[0026] Figure 10 This is a diagram showing the fit between the pressure supply component and the filter.

[0027] Figure 11 This is a diagram showing the fit between the suction assembly and the filter hole 2.

[0028] Figure 12 This is a schematic diagram of the first working state of the present invention.

[0029] Figure 13 This is a schematic diagram of the second working state of the present invention.

[0030] The diagram shows: 1. Vaporization tank; 2. Liquid inlet; 3. Exhaust outlet; 4. Filter; 5. Arc-shaped annular surface; 6. Transmission box; 7. Liquid inlet; 8. Filter assembly; 801. Filter plate; 802. Filter hole one; 803. Filter hole two; 804. Sealing ring; 805. Top plate; 806. Bottom plate; 807. Pressure supply assembly; 8071. Cone one; 8072. Slide groove one; 80 73. Pusher head 1; 8074. Connecting rod 1; 8075. Pressure supply plug; 808. Suction assembly; 8081. Cone head 2; 8082. Slide groove 2; 8083. Pusher head 2; 8084. Connecting rod 2; 8085. Negative pressure plug; 809. Slot hole; 810. Through hole; 9. Filter chamber; 10. Distributing chamber; 11. Partition plate; 12. Longitudinal groove; 13. Spring; 14. Baffle plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] See Figures 1-9 A high-purity ethylene glycol ethyl ether purification device includes a vaporization tank 1 and a liquid inlet 2 and an exhaust port 3 installed on the vaporization tank 1. The liquid inlet 2 is connected to a filter 4 via a flange. A liquid inlet 7 is installed on the top of the filter 4. An arc-shaped annular surface 5 is provided on the side wall of the filter 4. A transmission box 6 is installed on the outer wall of the filter 4. The output end of the transmission box 6 is connected to a filter assembly 8, which is located inside the arc-shaped annular surface 5. A partition 11 is installed inside the filter 4, dividing the filter 4 into a filter chamber 9 and a distribution chamber 10. The liquid inlet 7 communicates with the filter chamber 9. The filter assembly 8 includes a filter plate 801, a top plate 805, and a bottom plate 806. The top plate 805 and the bottom plate 806 form an irregularly shaped plate. The filter plate 801... A filter hole 802 is provided on one side and a filter hole 803 is provided on the other side. A bottom plate 806 is attached to the bottom of a filter plate 801, and a pressure supply component 807 on the bottom plate 806 is inserted into the filter hole 802 on the filter plate 801. A top plate 805 is attached to the top of a filter plate 801, and a suction component 808 on the top plate 805 is inserted into the filter hole 803 on the filter plate 801. Both the bottom plate 806 and the top plate 805 have through holes 810, which are staggered from the filter holes 802 and 803. A longitudinal groove 12 is provided inside the partition plate 11, and a baffle 14 is slidably installed in the longitudinal groove 12. The baffle 14 is connected to the inner wall of the longitudinal groove 12 by a spring 13 and is attached to the filter plate 801.

[0033] Specifically, the top plate 805 has a slot 809, and the baffle 14 passes through the slot 809 to fit the filter plate 801.

[0034] Specifically, a sealing ring 804 is installed on the outer side of the filter plate 801, and the sealing ring 804 fits against the inner wall of the arc-shaped annular surface 5.

[0035] It should be noted that filter hole 802 is flared downwards, while filter hole 803 is flared upwards. This design of filter holes 802 and 803 improves the tolerance of their use in conjunction with the pressure supply assembly 807 and the material suction assembly 808. The transmission box 6 has two built-in motors: one controls the rotation of the filter plate 801, and the other controls the rotation of the top plate 805 and the bottom plate 806.

[0036] It should be noted that, in the initial state, see Figures 7-11The base plate 806 is attached to the bottom of the filter plate 801, and the cone-shaped head 8071 on the base plate 806 is inserted into the filter hole 802, causing the filter hole 802 to be blocked. See also Figure 8 Baffle 14 is attached to filter plate 801, separating filter chamber 9 from material distribution chamber 10. Figure 9 Based on this, filter plate 801 has filter hole 1 802 on the left side and filter hole 2 803 on the right side.

[0037] In use, the ethylene glycol ethyl ether stock solution is mixed with the ferrous sulfate solution and added to the filter chamber 9 through inlet 7. After standing for a period of time, the ferric hydroxide precipitate and impurities in the stock solution are deposited on the left side of the filter plate 801. Figure 9 Based on this, filter plate 801 has filter hole 1 802 on the left side and filter hole 2 803 on the right side.

[0038] The transmission box 6 has a built-in motor that drives the filter plate 801 to rotate clockwise. At this time, the top plate 805 and the bottom plate 806 are fixed. Figure 12 As shown, filter hole 802 is in a connected state, filter plate 801 is detached from contact with baffle 14, and filter chamber 9 is connected to distribution chamber 10. As filter plate 801 rotates, ethylene glycol ethyl ether enters vaporization tank 1 through filter hole 802 on the left side of filter plate 801. Meanwhile, impurities on the left side of filter plate 801 move towards filter hole 803 on the right side of filter plate 801 under the impact of the solution, allowing the impurities to enter distribution chamber 10. This prevents impurities from clogging inside filter hole 802, which would increase the resistance to liquid flow or even completely block the flow.

[0039] It should be noted that, since impurities are sent to the right side of the filter plate 801, the filter hole 803 on the right side of the filter plate 801 is easily obstructed by impurities, resulting in obstruction of liquid drainage from the filter hole 803 on the right side of the filter plate 801 and liquid accumulation in the distribution chamber 10. Based on this, the present invention first reduces the amount of ethylene glycol ethyl ether conveyed to the distribution chamber 10 by the baffle 14 to prevent a large amount of ethylene glycol ethyl ether from flowing into the distribution chamber 10. After the ethylene glycol ether inside the filter chamber 9 is drained, the transmission box 6 drives the filter plate 801 to reset, that is, the transmission box 6 drives the filter plate 801 to rotate counterclockwise. The filter plate 801 moves closer to the top plate 805. As the filter plate 801 rotates, the top plate 805 presses down the impurities on the right side of the filter plate 801, accelerating the drainage of liquid from the filter hole 2 803 and preventing liquid accumulation in the distribution chamber 10.

[0040] See Figures 3-13The pressure supply assembly 807 includes a cone head 8071. When the base plate 806 is attached to the bottom of the filter plate 801, the filter hole 802 is blocked by the base plate 806. At the same time, the cone head 8071 is inserted into the filter hole 802 from the bottom. A sliding groove 8072 is provided on the base plate 806, which communicates with the cone head 8071. A push head 8073 is slidably installed on the sliding groove 8072. The outer side is attached to the inner wall of the arc-shaped annular surface 5. The inner side of the push head 8073 is equipped with the connecting rod 8074, and the pressure supply plug 8075 is fixedly installed on the connecting rod 8074. As the filter plate 801 and the base plate 806 rotate, under the action of the push head 8073 and the arc-shaped annular surface 5, the push head 8073 pushes the pressure supply plug 8075 to move, and the pressure supply plug 8075 pushes the gas inside the cone head 8071 to be discharged from the cone head 8071.

[0041] Specifically, the suction assembly 808 includes a second cone head 8081. When the top plate 805 is attached to the top of the filter plate 801, the second cone head 8081 is inserted into the second filter hole 803. A second sliding groove 8082 is opened on the top plate 805, and a second push head 8083 is slidably installed on the second sliding groove 8082. The outer side of the second push head 8083 is attached to the inner wall of the arc-shaped annular surface 5, and a second connecting rod 8084 is installed on the inner side of the second push head 8083. A negative pressure plug 8085 is fixedly installed on the second connecting rod 8084. As the filter plate 801 and the bottom plate 806 rotate, under the action of the second push head 8083 and the arc-shaped annular surface 5, the second push head 8083 pushes the negative pressure plug 8085 to move, and the second cone head 8081 generates negative pressure and adsorbs impurities inside the second filter hole 803.

[0042] Specifically, the arc-shaped annular surface 5 has a convex center.

[0043] It should be noted that there are some sticky impurities in ethylene glycol ethyl ether. When these impurities clog filter pore 2 803, they tend to adhere to the inside of filter pore 2 803 and are difficult to clean. Based on this, after the filter plate 801 is reset, the transmission box 6 drives the filter plate 801, top plate 805, and bottom plate 806 to rotate synchronously counterclockwise, as follows. Figure 11 and Figure 13 As shown, under the action of the pusher head 8083 and the arc-shaped annular surface 5, the pusher head 8083 pushes the negative pressure plug 8085 to move through the connecting rod 8084. As the negative pressure plug 8085 moves, the cone head 8081 generates negative pressure, which adsorbs the sticky impurities inside the filter hole 803. Then, the top plate 805 and the bottom plate 806 stop rotating, and the transmission box 6 drives the filter plate 801 to rotate clockwise, so that the filter plate 801 moves away from the top plate 805, sucking out the sticky impurities inside the filter hole 803 and preventing the filter hole 803 from becoming clogged.

[0044] Although most impurities are pushed towards the filter hole 803 on the right side of the filter plate 801 by the impact of ethylene glycol ethyl ether, a small portion of impurities will still clog the filter hole 802. Therefore, in this invention, the filter plate 801, top plate 805, and bottom plate 806 rotate counterclockwise synchronously with the drive box 6. Figure 10 and Figure 13 As shown, under the action of the pusher head 8073 and the arc-shaped annular surface 5, the pusher head 8073 pushes the pressure plug 8075 to move through the connecting rod 8074. The pressure plug 8075 pushes the gas inside the cone head 8071 to be discharged from the cone head 8071, blowing out the impurities blocked in the filter hole 802.

[0045] Please see Figures 1-9 As shown, this invention provides a method for purifying high-purity ethylene glycol ethyl ether. The method is applied to the high-purity ethylene glycol ethyl ether purification apparatus described in the above embodiments, and includes the following steps: Step S1: Mix the ethylene glycol ethyl ether stock solution with the ferrous sulfate solution and add it to the filter chamber 9 through the inlet 7. After standing for a period of time, the ferric hydroxide precipitate and the impurities in the stock solution are deposited on one side of the filter plate 801. Step S2: The motor inside the transmission box 6 drives the filter plate 801 to rotate clockwise, the filter hole 802 is in a connected state, the filter plate 801 is disengaged from the baffle 14, and the filter chamber 9 is connected to the material distribution chamber 10. Step S3: As the filter plate 801 rotates, ethylene glycol ethyl ether enters the gasification tank 1 through the filter hole 802 on one side of the filter plate 801, while impurities on one side of the filter plate 801 move towards the filter hole 803 on the other side of the filter plate 801 under the impact of the solution, causing the impurities to enter the distribution chamber 10. Step S4: After the ethylene glycol ether inside the filter chamber 9 is drained, the transmission box 6 drives the filter plate 801 to reset, that is, the transmission box 6 drives the filter plate 801 to rotate counterclockwise. The filter plate 801 moves closer to the top plate 805. As the filter plate 801 rotates, the top plate 805 presses down the impurities on the other side of the filter plate 801, accelerating the drainage of the filter hole 803.

[0046] The implementation principle of this invention is as follows: In use, the ethylene glycol ethyl ether stock solution is mixed with the ferrous sulfate solution and added to the filter chamber 9 through inlet 7. After standing for a period of time, the ferric hydroxide precipitate and impurities in the stock solution are deposited on the left side of the filter plate 801. Figure 9 Based on this, filter plate 801 has filter hole 1 802 on the left side and filter hole 2 803 on the right side.

[0047] The transmission box 6 has a built-in motor that drives the filter plate 801 to rotate clockwise. The top plate 805 and the bottom plate 806 are fixed. Figure 12As shown, filter hole 802 is in a connected state, filter plate 801 is detached from contact with baffle 14, and filter chamber 9 is connected to distribution chamber 10. As filter plate 801 rotates, ethylene glycol ethyl ether enters vaporization tank 1 through filter hole 802 on the left side of filter plate 801. Meanwhile, impurities on the left side of filter plate 801 move towards filter hole 803 on the right side of filter plate 801 under the impact of the solution, allowing the impurities to enter distribution chamber 10. This prevents impurities from clogging inside filter hole 802, which would increase the resistance to liquid flow or even completely block the flow.

[0048] It should be noted that, since impurities are sent to the right side of the filter plate 801, the filter hole 803 on the right side of the filter plate 801 is easily obstructed by impurities, resulting in obstruction of liquid drainage from the filter hole 803 on the right side of the filter plate 801 and liquid accumulation in the distribution chamber 10. Based on this, the present invention first reduces the amount of ethylene glycol ethyl ether conveyed to the distribution chamber 10 by the baffle 14 to prevent a large amount of ethylene glycol ethyl ether from flowing into the distribution chamber 10. After the ethylene glycol ether inside the filter chamber 9 is drained, the transmission box 6 drives the filter plate 801 to reset, that is, the transmission box 6 drives the filter plate 801 to rotate counterclockwise. The filter plate 801 moves closer to the top plate 805. As the filter plate 801 rotates, the top plate 805 presses down the impurities on the right side of the filter plate 801, accelerating the drainage of liquid from the filter hole 2 803 and preventing liquid accumulation inside the distribution chamber 10.

[0049] It should be noted that some impurities in ethylene glycol ethyl ether are sticky. When these impurities clog filter pores 803, they easily adhere to the inside of the filter pores 803 and are difficult to clean. Therefore, after the filter plate 801 is reset, the transmission box 6 drives the filter plate 801, top plate 805, and bottom plate 806 to rotate synchronously counterclockwise. Figure 11 and Figure 13 As shown, under the action of the pusher head 8083 and the arc-shaped annular surface 5, the pusher head 8083 pushes the negative pressure plug 8085 to move through the connecting rod 8084. As the negative pressure plug 8085 moves, the cone head 8081 generates negative pressure, which adsorbs the sticky impurities inside the filter hole 803. Then, the top plate 805 and the bottom plate 806 stop rotating, and the transmission box 6 drives the filter plate 801 to rotate clockwise, so that the filter plate 801 moves away from the top plate 805, sucking out the sticky impurities inside the filter hole 803 and preventing the filter hole 803 from becoming clogged.

[0050] Although most impurities are flushed towards the second filter hole 803 on the right side of the filter plate 801 during filtration, a small portion of impurities will still clog the first filter hole 802. Therefore, in this invention, the filter plate 801, top plate 805, and bottom plate 806 rotate counterclockwise synchronously with the drive box 6. Figure 10 and Figure 13As shown, under the action of the pusher head 8073 and the arc-shaped annular surface 5, the pusher head 8073 pushes the pressure plug 8075 to move through the connecting rod 8074. The pressure plug 8075 pushes the gas inside the cone head 8071 to be discharged from the cone head 8071, blowing out the impurities blocked in the filter hole 802.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-purity ethylene glycol ethyl ether purification device, characterized in that: Includes a gasification tank (1) and a liquid inlet (2) and an exhaust port (3) installed on the gasification tank (1). The liquid inlet (2) is connected to the flange of the filter (4). The top of the filter (4) is equipped with a liquid inlet (7). An arc-shaped annular surface (5) is provided on the side wall of the filter (4). A transmission box (6) is installed on the outer wall of the filter (4). The output end of the transmission box (6) is connected to the filter assembly (8). The filter assembly (8) is located inside the arc-shaped annular surface (5). A partition (11) is installed inside the filter (4). The partition (11) divides the filter (4) into a filter chamber (9) and a material distribution chamber (10). The liquid inlet (7) is connected to the filter chamber (9). The filter assembly (8) includes a filter plate (801), a top plate (805), and a bottom plate (806). The top plate (805) and the bottom plate (806) form an irregular plate. The filter plate (801) has a filter hole 1 (802) on one side and a filter hole 2 (803) on the other side. The bottom plate (806) is attached to the bottom of the filter plate (801). The pressure supply assembly (807) on the bottom plate (806) is inserted into the filter hole 1 (802) on the filter plate (801). The top plate (805) is attached to the top of the filter plate (801). The suction assembly (808) on the top plate (805) is inserted into the filter hole 2 (803) on the filter plate (801). The bottom plate (806) and the top plate (805) are both provided with through holes (810). The through holes (810) are staggered from the filter holes 1 (802) and the filter holes 2 (803). The partition (11) has a longitudinal groove (12) inside, and a baffle (14) is slidably installed in the longitudinal groove (12). The baffle (14) is connected to the inner wall of the longitudinal groove (12) by a spring (13), and the baffle (14) fits against the filter plate (801).

2. The high-purity ethylene glycol ethyl ether purification device according to claim 1, characterized in that: The pressure supply assembly (807) includes a cone head (8071). When the base plate (806) is attached to the bottom of the filter plate (801), the filter hole (802) is blocked by the base plate (806). At the same time, the cone head (8071) is inserted into the filter hole (802) from the bottom. The base plate (806) has a sliding groove (8072) which is connected to the cone head (8071). A push head (8073) is slidably installed on the sliding groove (8072). The outer side of the push head (8073) is attached to the inner wall of the arc-shaped annular surface (5). A connecting rod (8074) is installed on the inner side of the push head (8073). A pressure plug (8075) is fixedly installed on the connecting rod (8074). As the filter plate (801) and the base plate (806) rotate, under the action of the pusher (8073) and the arc-shaped ring surface (5), the pusher (8073) pushes the pressure plug (8075) to move, and the pressure plug (8075) pushes the gas inside the cone (8071) to be discharged from the cone (8071).

3. The high-purity ethylene glycol ethyl ether purification device according to claim 1, characterized in that: The suction assembly (808) includes a second cone head (8081). When the top plate (805) is attached to the top of the filter plate (801), the second cone head (8081) is inserted into the second filter hole (803). A second sliding groove (8082) is opened on the top plate (805). A second pusher head (8083) is slidably installed on the second sliding groove (8082). The outer side of the second pusher head (8083) is attached to the inner wall of the arc-shaped annular surface (5). A second connecting rod (8084) is installed on the inner side of the second pusher head (8083). A negative pressure plug (8085) is fixedly installed on the second connecting rod (8084). As the filter plate (801) and the base plate (806) rotate, under the action of the pusher head (8083) and the arc-shaped ring surface (5), the pusher head (8083) pushes the negative pressure plug (8085) to move, and the cone head (8081) generates negative pressure and adsorbs impurities inside the filter hole (803).

4. The high-purity ethylene glycol ethyl ether purification apparatus according to claim 1, characterized in that: The arc-shaped annular surface (5) has a convex center.

5. The high-purity ethylene glycol ethyl ether purification apparatus according to claim 1, characterized in that: The top plate (805) has a slot (809) and the baffle (14) passes through the slot (809) to fit the filter plate (801).

6. The high-purity ethylene glycol ethyl ether purification apparatus according to claim 1, characterized in that: A sealing ring (804) is installed on the outside of the filter plate (801), and the sealing ring (804) fits against the inner wall of the arc-shaped ring surface (5).

7. A method for purifying high-purity ethylene glycol ethyl ether, characterized in that, The method is applied to the high-purity ethylene glycol ethyl ether purification apparatus as described in any one of claims 1-6 above, and the method includes the following steps: Step S1: Mix the ethylene glycol ethyl ether stock solution with the ferrous sulfate solution and add it to the filter chamber (9) through the inlet (7). After standing for a period of time, the ferric hydroxide precipitate and the impurities in the stock solution are deposited on one side of the filter plate (801). Step S2: The built-in motor of the transmission box (6) drives the filter plate (801) to rotate clockwise, the filter hole one (802) is in the connected state, the filter plate (801) is disengaged from the baffle (14), and the filter chamber (9) is connected to the material distribution chamber (10); Step S3: As the filter plate (801) rotates, ethylene glycol ethyl ether enters the gasification tank (1) through the filter hole one (802) on one side of the filter plate (801), while the impurities on one side of the filter plate (801) move towards the filter hole two (803) on the other side of the filter plate (801) under the impact of the solution, so that the impurities enter the distribution chamber (10). Step S4: After the ethylene glycol ether inside the filter chamber (9) is drained, the transmission box (6) drives the filter plate (801) to reset, that is, the transmission box (6) drives the filter plate (801) to rotate counterclockwise. The filter plate (801) moves close to the top plate (805). As the filter plate (801) rotates, the top plate (805) presses the impurities on the other side of the filter plate (801) to accelerate the drainage of the filter hole two (803).

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