A crystallization separation device and a crystallization separation method for preparing electronic-grade dimethyl carbonate

Abstract

The present invention relates to the technical field of chemical separation, and discloses a crystallization separation device and a crystallization separation method for preparing electronic-grade dimethyl carbonate. The crystallization separation device includes a support frame, on which a conveyor belt is arranged. On one side of the support frame, a liquid injection device is arranged, and on the other side of the support frame, a crystallization device is arranged. A plurality of fixing plates are arranged on the conveyor belt, and a limiting plate is rotatably connected to the fixing plate. The limiting plate is fixedly connected with a flask. A fixing column is fixedly connected to the lower part of the flask, and the other end of the fixing column is fixedly connected with a round tube. The other end of the round tube is slidably connected with a sliding round block. The crystallization separation device and the crystallization separation method for preparing electronic-grade dimethyl carbonate can shake the flask during the crystallization process, so that the contact area between the stock solution in the flask and the flask is increased, the stock solution can be cooled more evenly, and at the same time, the stock solution crystallizes more evenly.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical separation, and specifically to a crystallization separation device and a crystallization separation method for preparing electronic-grade dimethyl carbonate. Background Technique

[0002] With the rapid development of the lithium battery industry, the demand for electronic-grade dimethyl carbonate (DMC) is increasing day by day. As an important component of lithium battery electrolytes, electronic-grade DMC has extremely high requirements for its purity and quality. Therefore, the development of efficient and stable crystallization separation equipment has become the key to preparing high-quality electronic-grade DMC. The crystallization separation equipment for preparing electronic-grade dimethyl carbonate has been widely used in fields such as lithium battery electrolytes and organic synthesis. By using these equipment, enterprises can produce high-quality electronic-grade DMC to meet market demand. At the same time, the application of these equipment has also brought significant economic benefits to enterprises, improving production efficiency and product quality. With the progress of technology and the development of the industry, the crystallization separation equipment for preparing electronic-grade dimethyl carbonate will continue to develop in the direction of higher efficiency, more environmental protection, and more intelligence. In the future, these equipment will pay more attention to innovations in aspects such as energy conservation and consumption reduction, automatic control, and intelligent management to meet the growing market demand and environmental protection requirements.

[0003] In the existing crystallization separation equipment and crystallization separation method for preparing electronic-grade dimethyl carbonate, when the stock solution crystallizes, during the process of cooling and crystallizing the stock solution in the flask, the stock solution in the flask may cool unevenly, affecting the crystallization efficiency of the stock solution, and thus easily causing waste of the stock solution; therefore, it does not meet the existing requirements, and for this reason, we propose a crystallization separation device and a crystallization separation method for preparing electronic-grade dimethyl carbonate. Summary of the Invention

[0004] The present invention provides a crystallization separation device and a crystallization separation method for preparing electronic-grade dimethyl carbonate, which have the beneficial effect of increasing the contact area between the stock solution in the flask and the flask by shaking the flask, improving the cooling efficiency of the stock solution, and solving the problem mentioned in the above background technology that after crystallization is completed, it is necessary to specifically pour out the waste liquid in the flask, increasing the complexity of the work and, to a certain extent, increasing the production cost.

[0005] The present invention provides the following technical solution: A crystallization separation device for preparing electronic-grade dimethyl carbonate, including a support frame, a conveyor belt is arranged on the support frame, a liquid injection device is arranged on one side of the support frame, a crystallization device is arranged on the other side of the support frame, a plurality of fixing plates are arranged on the conveyor belt, a limiting plate is rotatably connected to the fixing plate, the limiting plate is fixedly connected to a flask, a fixing column is fixedly connected to the lower part of the flask, the other end of the fixing column is fixedly connected to a circular tube, and the other end of the circular tube is slidably connected to a sliding circular block, and the circular tube passes through the sliding circular block;

[0006] A control slide plate is arranged on the lower side of the conveyor belt. The control slide plate is fixedly installed on the support frame, and a wavy chute is formed in the control slide plate.

[0007] When the sliding round block is located in the wavy chute, the flask shakes, and a filter screen is arranged inside the flask.

[0008] As an alternative embodiment of the crystallization separation device for preparing electronic-grade dimethyl carbonate according to the present invention, wherein: the wavy chute communicates with an inclined chute, and the inclined chute is formed in the control slide plate.

[0009] When the sliding round block is located in the inclined chute, the flask tilts to the maximum angle, and the waste liquid in the flask flows into the collection device through the empty slot. The empty slot is formed in the side wall of one side of the crystallization device.

[0010] As an alternative embodiment of the crystallization separation device for preparing electronic-grade dimethyl carbonate according to the present invention, wherein: a fixing rod is fixedly connected to the limiting plate, the other end of the fixing rod is fixedly connected to a sliding rod, the other end of the sliding rod is fixedly connected to a sliding column, a sealing sheet is fixedly connected to the sliding rod, and the sealing sheet is slidably connected to an air chamber.

[0011] As an alternative embodiment of the crystallization separation device for preparing electronic-grade dimethyl carbonate according to the present invention, wherein: a bottle mouth plug is arranged at the bottle mouth of the flask, an air bag is arranged on the bottle mouth plug, a connecting rod is fixedly connected to one side of the bottle mouth plug, and the air bag communicates with an air pipe. The air pipe is located inside the connecting rod.

[0012] As an alternative embodiment of the crystallization separation device for preparing electronic-grade dimethyl carbonate according to the present invention, wherein: one end of the connecting rod is fixedly connected to a sliding pipe, a straight chute and a spiral chute are formed in the inner wall of the sliding pipe, and the straight chute communicates with the spiral chute. The air chamber is fixedly installed in the sliding pipe.

[0013] As an alternative embodiment of the crystallization separation device for preparing electronic-grade dimethyl carbonate according to the present invention, wherein: the sliding column is slidably connected to the straight chute and the spiral chute.

[0014] When the sliding column slides in the spiral chute, the sliding pipe drives the connecting rod to rotate.

[0015] As an alternative embodiment of the crystallization separation device for preparing electronic-grade dimethyl carbonate according to the present invention, wherein: the lower end of the sliding pipe is rotatably connected to a resisting pipe, a first sliding chute is formed in one side of the resisting pipe, and the first sliding chute is slidably connected to the fixing rod.

[0016] As an optional scheme of a crystallization separation device for preparing electronic grade dimethyl carbonate described in the present invention, wherein: the lower end of the abutment tube is fixedly connected to a straight rod, the other end of the straight rod is fixedly connected to a control rod, one end of the straight rod is inserted into the circular tube, a spring is arranged in the circular tube, one end of the spring abuts against one side of the straight rod, and the straight rod is slidably connected to the circular tube, the control rod is slidably connected to the center of the sliding circular block, and the lower end of the control rod is fixedly connected to a sliding ball.

[0017] As an optional solution of a crystallization separation equipment for preparing electronic grade dimethyl carbonate described in the present invention, a control block is fixedly connected to the lower side of the control slide plate, a horn groove is opened on one side of the control block, the horn groove is used to guide the sliding ball, the horn groove is connected to an inclined guide groove, and the inclined guide groove is slidably connected to the sliding ball.

[0018] A crystallization separation method for preparing electronic grade dimethyl carbonate comprises the following steps:

[0019] S1: injecting the dimethyl carbonate solution to be crystallized and separated into a flask on a conveyor belt through a liquid injection device;

[0020] S2: Start the conveyor belt, so that the flask moves with the conveyor belt to the vicinity of the crystallization device for heating and melting. During the conveying process, the flask will be shaken by the wave chute, which is conducive to the mixing of the solution and uniform crystallization;

[0021] S3: When the flask moves to the end of the wave chute on the control slide, the sliding circular block will enter the inclined chute, causing the flask to tilt to the maximum angle, so that the waste liquid in the flask flows into the collection device below through the empty slot, achieving solid-liquid separation;

[0022] S4: When the flask has finished tilting and draining, it continues to move to the next processing area along the conveyor belt.

[0023] The present invention has the following beneficial effects:

[0024] 1. The crystallization separation equipment for preparing electronic-grade dimethyl carbonate realizes efficient and automated production of electronic-grade dimethyl carbonate crystallization separation through the ingenious combination of annular assembly line design, wave chute and inclined chute; the flask shakes evenly under the guidance of the wave chute, which optimizes the crystallization process and reduces waste; after the crystallization is completed, the inclined chute guides the flask to tilt, and the waste liquid automatically flows into the collection device, realizing efficient recovery and environmental protection treatment of the waste liquid. The overall design improves production efficiency, reduces labor costs and resource waste, and ensures the stability and reliability of equipment operation, with significant economic and environmental benefits.

[0025] 2. The crystallization separation equipment for preparing electronic grade dimethyl carbonate can automatically remove the bottle stopper from the bottle mouth of the flask before the flask moves to the collecting device through the design of the sliding ball, the control rod, the straight rod and other components, so that the waste liquid can be quickly poured out;

[0026] Moreover, after the bottle stopper is taken out, the sliding column cooperates with the spiral slide groove to make the sliding tube drive the connecting rod and the bottle stopper to rotate together, thereby changing the position of the bottle stopper and avoiding the situation that the bottle stopper is stuck at the bottle mouth of the flask when pouring the waste liquid, thus ensuring the smooth pouring process; after pouring the waste liquid, the spring can drive the straight rod, the resistance tube, the sliding tube and other components to slide downward together, so as to realize the automatic resetting of the bottle stopper and prepare for the next use.

[0027] 3. The crystallization separation equipment for preparing electronic grade dimethyl carbonate ensures that the flask can maintain good sealing performance when it needs to be sealed through the coordinated use of the bottle mouth plug and the air bag, effectively preventing the leakage of dimethyl carbonate and other substances, and ensuring the safety and purity of the experiment or production process; when it is necessary to dump the waste liquid, the linkage design of the sliding tube, the air chamber, the sealing sheet and other components allows the air bag to automatically shrink, thereby reducing the friction between the bottle mouth plug and the bottle mouth of the flask, so that the bottle mouth plug can be taken out of the flask more conveniently, improving the operating efficiency, and further enabling the waste liquid to be quickly dumped. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the empty slot structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the structure of the clamping block fixing plate of the present invention.

[0031] Figure 4 It is a schematic diagram of the cross-sectional structure of the fixing plate of the present invention.

[0032] Figure 5 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0033] Figure 6 It is a schematic diagram of the spring structure of the present invention.

[0034] Figure 7 It is a schematic cross-sectional structural diagram of the control slide plate of the present invention.

[0035] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point B in the middle.

[0036] Figure 9 Schematic diagram of the trachea structure of the present invention.

[0037] Figure 10 Schematic diagram of the wave chute structure of the present invention.

[0038] Figure 11 Schematic diagram of the sectional view of the flask of the present invention.

[0039] Figure 12 For the present invention Figure 11 Enlarged schematic diagram of part C.

[0040] In the figure: 1, support frame; 11, conveyor belt; 12, liquid injection device; 13, crystallization device; 14, collection device; 15, empty tank; 2, fixed plate; 21, limiting plate; 22, flask; 23, fixing rod; 24, sliding rod; 25, sliding column; 26, sealing piece; 27, air chamber; 28, bottle mouth plug; 29, airbag; 210, trachea; 211, connecting rod; 212, sliding tube; 213, straight chute; 214, spiral chute; 215, contact tube; 216, first sliding groove; 217, filter screen; 3, straight rod; 31, control rod; 32, sliding ball; 33, fixing column; 34, round tube; 35, spring; 36, sliding round block; 37, control slide plate; 38, wave chute; 39, inclined chute; 310, control block; 311, horn chute; 312, inclined guiding chute. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment 1, please refer to Figures 1 - 12 The present invention discloses a crystallization separation device and a crystallization separation method for preparing electronic-grade dimethyl carbonate. The crystallization separation device includes a support frame 1. A conveyor belt 11 is arranged on the support frame 1. The support frame 1 and the conveyor belt 11 are designed in a circular pipeline type. Through such a design, the production efficiency can be improved to a certain extent. A liquid injection device 12 is arranged on one side of the support frame 1, and a crystallization device 13 is arranged on the other side of the support frame 1. A plurality of fixed plates 2 are arranged on the conveyor belt 11. The fixed plates 2 are rotatably connected with a limiting plate 21. The limiting plate 21 is fixedly connected with a flask 22. A fixing column 33 is fixedly connected below the flask 22. The other end of the fixing column 33 is fixedly connected with a round tube 34. The other end of the round tube 34 is slidably connected with a sliding round block 36, and the round tube 34 passes through the sliding round block 36;

[0043] A control slide plate 37 is arranged on the lower side of the conveyor belt 11. The control slide plate 37 is fixedly installed on the support frame 1, and a wave chute 38 is formed on the control slide plate 37.

[0044] The wave chute 38 communicates with an inclined chute 39, and the inclined chute 39 is formed on the control slide plate 37;

[0045] When the sliding round clamping block 36 is located in the wave chute 38, the flask 22 shakes. A filter screen 217 is arranged inside the flask 22. Through the arrangement of the filter screen 217, when pouring the waste liquid later, the crystals that have crystallized in the flask 22 can be prevented from being poured out;

[0046] When the sliding round clamping block 36 is located in the inclined chute 39, the flask 22 tilts to the maximum angle, and the waste liquid in the flask 22 flows into the collection device 14 through the empty slot 15.

[0047] When the conveyor belt 11 drives the flask 22 to move into the liquid injection device 12, the stock solution is added into the flask 22 through the liquid injection device 12. Subsequently, under the conveyance of the conveyor belt 11, the flask 22 is moved into the crystallization device 13. It should be noted that the fixed plate 2 is fixedly installed on the conveyor belt 11. When the conveyor belt 11 moves, it will drive the fixed plate 2, the limiting plate 21 and the flask 22 to move together. When the flask 22 moves into the interior of the crystallization device 13, the stock solution crystallizes in the flask 22;

[0048] At the same time, when the fixed plate 2 and the flask 22 move into the interior of the crystallization device 13, at this time, the sliding round clamping block 36 slides in the wave chute 38. While the sliding round clamping block 36 slides in the wave chute 38, under the guidance of the wave chute 38, the sliding round clamping block 36 is guided to slide. Through the sliding of the sliding round clamping block 36, the round tube 34 is driven to slide together, so that the round tube 34 slides with the sliding round clamping block 36. While the round tube 34 slides, it drives the fixed column 33 and the flask 22 to move, and with the restriction of the limiting plate 21 on the flask 22, the flask 22 shakes, so that the round tube 34 drives the fixed column 33 and the flask 22 to shake. Through the shaking of the flask 22, the contact area between the stock solution and the interior of the flask 22 can be increased, so that the stock solution in the flask 22 can be cooled more evenly, improving the crystallization efficiency and reducing the waste of the stock solution at the same time.

[0049] When the crystallization of the stock solution in the flask 22 is completed, as the conveyor belt 11 continues to drive the flask 22 to move, the sliding round clamping block 36 slides into Figure 10In the inclined chute 39 shown, under the guidance of the inclined chute 39, the sliding circular clamping block 36 slides to the farthest distance, tilting the flask 22 to the maximum angle. At the same time, through the design of a straight groove in a section of the inclined chute 39, enough time can be provided for pouring out the waste liquid from the flask 22. At this time, the flask 22 just moves to the empty slot 15, enabling the waste liquid in the flask 22 to pour into the collection device 14 through the empty slot 15, so that the waste liquid can be collected. It should be noted that the flask 22 is designed as an inverted cone. Through this design, the waste liquid inside the flask 22 can be poured out without completely tilting the flask 22.

[0050] In this embodiment: Under the guidance of the wave chute 38 on the sliding circular clamping block 36, the sliding circular clamping block 36 can drive the circular tube 34, the fixed column 33, and the flask 22 to shake. At the same time, through the design of the rotational connection between the circular tube 34 and the sliding circular clamping block 36, when the sliding circular clamping block 36 is guided by the wave chute 38 and shakes, the flask 22 can shake stably, preventing the position of the flask 22 from shifting. When the stock solution in the flask 22 is completely crystallized, then under the guidance of the inclined chute 39, the waste liquid in the flask 22 can be poured into the collection device 14 to collect the waste liquid.

[0051] Embodiment 2. This embodiment aims to facilitate the solution of the problem that the bottle mouth plug 28 affects the pouring of the liquid when pouring the waste liquid. This embodiment is an improvement based on Embodiment 1. Specifically, please refer to Figures 1 - 12 , one end of the connecting rod 211 is fixedly connected with a sliding tube 212. A straight chute 213 and a spiral chute 214 are provided on the inner wall of the sliding tube 212. The straight chute 213 is communicated with the spiral chute 214. The air chamber 27 is fixedly installed in the sliding tube 212.

[0052] The sliding column 25 is slidably connected with the straight chute 213 and the spiral chute 214;

[0053] When the sliding column 25 slides in the spiral chute 214, the sliding tube 212 drives the connecting rod 211 to rotate.

[0054] The lower end of the sliding tube 212 is rotatably connected with a contact tube 215. A first sliding groove 216 is provided on one side of the contact tube 215. The first sliding groove 216 is slidably connected with the fixed rod 23. Through the design of the first sliding groove 216, when the contact tube 215 slides up and down, it will not affect the fixed rod 23, enabling the contact tube 215 to operate normally.

[0055] The lower end of the contact tube 215 is fixedly connected to a straight rod 3, and the other end of the straight rod 3 is fixedly connected to a control rod 31. One end of the straight rod 3 is inserted into a circular tube 34. A spring 35 is arranged inside the circular tube 34. Through the design of the spring 35, power can be provided for subsequent reset. One end of the spring 35 abuts against one side of the straight rod 3, and the straight rod 3 is slidably connected to the circular tube 34. The control rod 31 is slidably connected to the center of the sliding circular block 36. It should be noted that an annular elastic sheet is arranged on the sliding circular block 36, and the control rod 31 is slidably connected to the annular elastic sheet on the sliding circular block 36. Through such a design, when the sliding circular block 36 slides, it can drive the control rod 31 to slide together, and at the same time, it can prevent the control rod 31 from getting stuck with the sliding circular block 36. The annular elastic sheet can be an annular airbag, and the lower end of the control rod 31 is fixedly connected to a sliding ball 32.

[0056] A control block 310 is fixedly connected to the lower side of the control slide plate 37. A horn groove 311 is formed on one side of the control block 310. The horn groove 311 is used to guide the sliding ball 32. The horn groove 311 communicates with an inclined guiding chute 312, and the inclined guiding chute 312 is slidably connected to the sliding ball 32. Through the design of the horn groove 311, the sliding ball 32 can more easily slide into the inclined guiding chute 312 inside the control block 310.

[0057] Before the flask 22 moves to the collection device 14, it will cause the sliding ball 32 to slide into the horn groove 311 and the inclined guiding chute 312. Through the guiding of the inclined guiding chute 312 to the sliding ball 32, the sliding ball 32 slides upward. Through the upward sliding of the sliding ball 32, the sliding ball 32 drives the control rod 31 and the straight rod 3 to slide upward. While the straight rod 3 slides upward, it drives the contact tube 215 to slide upward together. See Figure 4 , while the contact tube 215 slides upward, it will push the sliding tube 212 to slide upward together. While the sliding tube 212 slides upward, it drives the connecting rod 211 and the bottle mouth plug 28 to slide upward together. Through the connecting rod 211 driving the bottle mouth plug 28 to slide upward, the bottle mouth plug 28 is pulled out of the flask 22, and the seal of the flask 22 is opened; as Figure 8 shown, at this time, the sliding column 25 slides downward from top to bottom in the straight chute 213.

[0058] Meanwhile, as the sliding ball 32 drives the control rod 31 to continuously slide upward, the sliding column 25 slides from the spiral chute 214 into the abutting tube 215. As a result, when the sliding tube 212 continues to slide upward, the sliding tube 212 can rotate under the cooperation of the spiral chute 214 and the sliding column 25, enabling the position of the bottle stopper 28 to be changed so that the bottle stopper 28 does not affect the subsequent pouring of the waste liquid. With this design, after the bottle stopper 28 is removed from the mouth of the flask 22, the bottle stopper 28 is then driven to rotate, preventing the situation where the bottle stopper 28 gets stuck at the mouth of the flask 22.

[0059] In this embodiment: Through the guidance of the inclined guiding chute 312 on the sliding ball 32, the sliding ball 32 can drive the control rod 31 and the straight rod 3 to slide upward together. Through the upward sliding of the straight rod 3, the abutting tube 215, the sliding tube 212, the connecting rod 211, and the bottle stopper 28 are driven to slide upward together, enabling the bottle stopper 28 to be removed from the mouth of the flask 22, and further enabling the waste liquid to be quickly poured out.

[0060] Moreover, through the design of the straight chute 213 and the spiral chute 214, after the bottle stopper 28 is first removed from the flask 22, through the cooperation of the sliding column 25 and the spiral chute 214, the sliding tube 212 drives the connecting rod 211 and the bottle stopper 28 to rotate together, so that the bottle stopper 28 does not affect the pouring of the waste liquid in the flask 22.

[0061] Embodiment 3. The intention of this embodiment is to facilitate the solution of the problem that the bottle stopper 28 cannot block the mouth of the flask 22. This embodiment is an improvement made on the basis of Embodiment 2. Specifically, please refer to Figures 1 - 12 A fixing rod 23 is fixedly connected to the limiting plate 21. The other end of the fixing rod 23 is fixedly connected to a sliding rod 24. The other end of the sliding rod 24 is fixedly connected to a sliding column 25. A sealing piece 26 is fixedly connected to the sliding rod 24, and the sealing piece 26 is slidably connected to an air chamber 27.

[0062] A bottle stopper 28 is provided at the mouth of the flask 22. An airbag 29 is provided on the bottle stopper 28. A connecting rod 211 is fixedly connected to one side of the bottle stopper 28. The airbag 29 is communicated with an air tube 210. The air tube 210 is located inside the connecting rod 211. Through the design of the sealing piece 26 and the air chamber 27, when the sealing piece 26 slides in the air chamber 27, it can inhale or exhale air, thereby controlling the expansion and contraction of the airbag 29.

[0063] A crystallization separation method for preparing electronic-grade dimethyl carbonate includes the following steps:

[0064] S1: Inject the dimethyl carbonate solution to be crystallized and separated into the flask 22 on the conveyor belt 11 through the liquid injection device 12;

[0065] S2: Start the conveyor belt 11 to move the flask 22 to the vicinity of the crystallization device 13 along with the conveyor belt 11 for heating and melting. During the conveying process, the flask 22 will be shaken under the influence of the wave chute 38, which helps the mixing inside the solution and uniform crystallization.

[0066] S3: When the flask 22 moves to the end of the wave chute 38 on the control slide 37, the sliding round block 36 will enter the inclined chute 39, causing the flask 22 to tilt to the maximum angle, so that the waste liquid in the flask 22 flows into the collection device 14 below through the empty slot 15, realizing solid-liquid separation.

[0067] S4: After the flask 22 finishes draining by tilting, it continues to move to the next processing area along with the conveyor belt 11.

[0068] While the sliding tube 212 slides upward, it will cause the air chamber 27 to slide together, enabling the sealing piece 26 to slide within the air chamber 27, creating a negative pressure within the air chamber 27, allowing the gas within the airbag 29 to be drawn into the air chamber 27 through the air tube 210, causing the airbag 29 to contract, facilitating the removal of the bottle stopper 28 from the mouth of the flask 22. With this design, while ensuring the sealing of the flask 22, the bottle stopper 28 can be quickly removed from the flask 22. At the same time, an exhaust hole is provided at the lower end of the air chamber 27. It should be noted that when the sliding ball 32 drives the control rod 31, the contact tube 215, the sliding tube 212, the air chamber 27, the connecting rod 211, and the bottle stopper 28 to slide upward, the fixed rod 23, the sealing piece 26, and the sliding column 25 are all fixed.

[0069] It should be noted that when the sliding ball 32 slides to the second half of the inclined guiding chute 312, under the guidance of the inclined guiding chute 312 and the cooperation of the spring 35, it will drive the straight rod 3 to slide downward. Through the downward sliding of the straight rod 3, it will drive the contact tube 215 and the sliding tube 212 to slide downward together. With this design, the sliding tube 212 first drives the connecting rod 211 and the bottle stopper 28 to rotate to the mouth of the flask 22. Subsequently, when the sliding column 25 slides within the straight chute 213, the bottle stopper 28 will be reinserted into the mouth of the flask 22. At the same time, through the reverse sliding of the air chamber 27, the sealing piece 26 can slide upward within the air chamber 27, squeezing the air within the air chamber 27, enabling the gas within the air chamber 27 to enter the airbag 29 through the air tube 210, causing the airbag 29 to expand and completing the sealing of the flask 22.

[0070] It should be noted that the temperature in the operating room where the device is located is sufficient to melt dimethyl carbonate, enabling normal melting of dimethyl carbonate. At the same time, when the flask 22 moves with dimethyl carbonate into the crystallization device 13, the crystallization device 13 cools the flask 22, causing dimethyl carbonate to crystallize while impurities remain in the liquid. After the waste liquid in the flask 22 is poured out, the flask 22 exits the crystallization device 13, thereby obtaining relatively pure dimethyl carbonate.

[0071] In this embodiment: By driving the bottle stopper 28 to be removed from the mouth of the flask 22, the airbag 29 is contracted simultaneously, making it more convenient to remove the bottle stopper 28 from the flask 22. While the bottle stopper 28 and the airbag 29 can seal the flask 22, when it is necessary to remove the bottle stopper 28 from the flask 22, the airbag 29 can also contract, enabling the bottle stopper 28 to be more conveniently removed from the mouth of the flask 22, and further enabling the waste liquid to be poured out quickly.

[0072] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A crystallization separation device for preparing electronic grade dimethyl carbonate, comprising a support frame (1), a conveyor belt (11) being arranged on the support frame (1), a liquid injection device (12) being arranged on one side of the support frame (1), and a crystallization device (13) being arranged on the other side of the support frame (1), characterized in that : A plurality of fixed plates (2) are arranged on the conveyor belt (11), the fixed plates (2) are rotatably connected to the limiting plates (21), the limiting plates (21) are fixedly connected to the flask (22), a fixed column (33) is fixedly connected below the flask (22), the other end of the fixed column (33) is fixedly connected to a circular tube (34), the other end of the circular tube (34) is slidably connected to a sliding circular block (36), and the circular tube (34) passes through the sliding circular block (36); A control slide plate (37) is provided on the lower side of the conveyor belt (11), the control slide plate (37) is fixedly mounted on the support frame (1), and a wave slide groove (38) is provided on the control slide plate (37); When the sliding circular block (36) is located in the wave slide groove (38), the flask (22) shakes, and a filter screen (217) is provided inside the flask (22).

2. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 1, characterized in that: The wave slide groove (38) is connected to an inclined slide groove (39), and the inclined slide groove (39) is provided on the control slide plate (37); When the sliding circular block (36) is located in the inclined slide groove (39), the flask (22) is tilted to a maximum angle, and the waste liquid in the flask (22) flows into the collecting device (14) through the empty groove (15), and the empty groove (15) is provided on a side wall of one side of the crystallization device (13).

3. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 1, characterized in that: A fixing rod (23) is fixedly connected to the limiting plate (21), the other end of the fixing rod (23) is fixedly connected to a sliding rod (24), the other end of the sliding rod (24) is fixedly connected to a sliding column (25), the sliding rod (24) is fixedly connected to a sealing sheet (26), and the sealing sheet (26) is slidably connected to an air bin (27).

4. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 3, characterized in that: The mouth of the flask (22) is provided with a mouth plug (28), an air bag (29) is provided on the mouth plug (28), one side of the mouth plug (28) is fixedly connected to a connecting rod (211), the air bag (29) is connected to an air pipe (210), and the air pipe (210) is located inside the connecting rod (211).

5. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 4, characterized in that: One end of the connecting rod (211) is fixedly connected to a sliding tube (212); a straight sliding groove (213) and a spiral sliding groove (214) are provided on the inner wall of the sliding tube (212); the straight sliding groove (213) is communicated with the spiral sliding groove (214); and the gas chamber (27) is fixedly installed in the sliding tube (212).

6. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 5, characterized in that: The sliding column (25) is slidably connected to the straight sliding groove (213) and the spiral sliding groove (214); When the sliding column (25) slides in the spiral sliding groove (214), the sliding tube (212) drives the connecting rod (211) to rotate.

7. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 6, characterized in that: The lower end of the sliding tube (212) is rotatably connected to a resistance tube (215), one side of the resistance tube (215) is provided with a first sliding groove (216), and the first sliding groove (216) is slidably connected to the fixing rod (23).

8. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 7, characterized in that: The lower end of the abutment tube (215) is fixedly connected to a straight rod (3), the other end of the straight rod (3) is fixedly connected to a control rod (31), one end of the straight rod (3) is inserted into the circular tube (34), a spring (35) is arranged in the circular tube (34), one end of the spring (35) abuts against one side of the straight rod (3), and the straight rod (3) is slidably connected to the circular tube (34), the control rod (31) is slidably connected to the center of the sliding circular block (36), and the lower end of the control rod (31) is fixedly connected to a sliding ball (32).

9. A crystallization separation device for preparing electronic grade dimethyl carbonate according to claim 8, characterized in that: A control block (310) is fixedly connected to the lower side of the control slide plate (37); a horn groove (311) is provided on one side of the control block (310); the horn groove (311) is used to guide the sliding ball (32); the horn groove (311) is connected to an inclined guide sliding groove (312); the inclined guide sliding groove (312) is slidably connected to the sliding ball (32).

10. The crystallization separation method of a crystallization separation device for preparing electronic grade dimethyl carbonate according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: injecting the dimethyl carbonate solution to be crystallized and separated into the flask (22) on the conveyor belt (11) through the liquid injection device (12); S2: starting the conveyor belt (11) so that the flask (22) moves along the conveyor belt to the vicinity of the crystallization device (13) for heating and melting. During the conveying process, the flask (22) is shaken by the wave chute (38), which helps to mix the solution and achieve uniform crystallization; S3: When the flask (22) moves to the end of the wave chute (38) on the control slide (37), the sliding circular block (36) enters the inclined chute (39), causing the flask (22) to tilt to a maximum angle, so that the waste liquid in the flask (22) flows through the empty groove (15) into the collecting device (14) below, thereby achieving solid-liquid separation; S4: When the flask (22) has completed the tilting and draining, it continues to move to the next processing area along the conveyor belt.

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