A high-efficiency separation device for a dimethyl carbonate rectification column

Abstract

The utility model discloses a kind of dimethyl carbonate rectifying column high-efficiency separation devices, including flip cover, for guaranteeing the sealing property inside rectifying column body when dimethyl carbonate is rectified inside rectifying column body, filtering mechanism, for filtering dimethyl carbonate raw materials into inside rectifying column body, the utility model is provided with detachable filtering mechanism in the top inside rectifying column body, filtering mechanism is filtered to raw materials, the inside of filter screen is also provided with the scraping strip for the fixed impurity inside surface of filter screen is scraped and cleaned, by rotating handle, the impurity filtered in the inside surface of filter screen is scraped and cleaned by scraping strip, it is scraped to the inside of the collection groove opened in the inside surface of filter screen, guarantee that filter screen can scrape raw materials, worker only needs to periodically dismount filter screen and clean it, without dismounting filter screen after each rectification.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, specifically to a high-efficiency separation device for a dimethyl carbonate distillation column. Background Technology

[0002] Dimethyl carbonate (DMC) is an important green chemical raw material widely used in lithium battery electrolytes, polycarbonate synthesis, and coating solvents. Its production process often requires distillation to remove impurities such as water, methanol, and propylene carbonate (PC).

[0003] When distilling dimethyl carbonate, if the raw material contains solid impurities or polymers of high-boiling-point substances, scaling substances may be generated during the distillation process, which may clog the trays, downcomers, packing layers, or pipelines, causing the distillation process to fail. Therefore, a high-efficiency separation device for dimethyl carbonate distillation tower with a filtration mechanism is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency separation device for a dimethyl carbonate distillation column. This device solves the problems mentioned in the background art by providing a detachable filter mechanism inside the top of the distillation column body, and by providing scraper strips inside the filter screen for scraping and cleaning impurities fixed on the inner surface of the filter screen.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-efficiency separation device for dimethyl carbonate distillation column, comprising:

[0007] The flip-top is located above the main body of the distillation column and is used to ensure the airtightness of the inside of the distillation column when distilling dimethyl carbonate.

[0008] The filtration mechanism, located inside the distillation column body, is used to filter the dimethyl carbonate feedstock entering the distillation column body.

[0009] Preferably, the filtration mechanism includes:

[0010] A filter screen, which is placed inside a placement slot opened at the top of the distillation column body; and a scraping assembly for scraping off impurities from the inner surface of the filter screen.

[0011] Preferably, the scraping assembly includes:

[0012] The scraper bar, located on the outer arc surface of the rotating handle, is used to scrape away impurities filtered from the bottom surface of the filter screen.

[0013] The rotating handle, which is located inside the filter screen, is used to drive the scraper to rotate.

[0014] Preferably, the surface of the filter holes on the bottom inner surface of the filter screen is provided with a collection groove for collecting impurities scraped off by the scraper.

[0015] Preferably, the inner wall of the filter screen is provided with an annular groove to limit the rotation of the scraper.

[0016] Preferably, a feed pipe is provided through the top of the flip cover, and a material distribution mechanism for distributing raw materials is also provided inside the flip cover.

[0017] Preferably, the material dispensing mechanism includes:

[0018] The feeding distribution plate has a symmetrically arranged locking block on its outer arc surface. The inner wall below the flip cover has a rotating groove, and the bottom end of the flip cover has symmetrically arranged mounting grooves. The locking block is inserted into the inside of the mounting groove and rotates to connect with the inner wall of the rotating groove.

[0019] The card slot is located on the inner wall of the rotating groove near the mounting groove, and the mounting groove and the card slot are staggered.

[0020] Preferably, the side wall of the card block facing the feed tube is provided with a stop block by a spring, and the guide rod provided on the side wall of the stop block is inserted into the insertion hole opened in the side wall of the card block.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This invention features a detachable filter mechanism installed inside the top of the distillation column. The filter mechanism filters the raw material, and the filter screen also has scrapers inside to remove and clean impurities fixed on the inner surface of the filter screen. By rotating the handle, the scrapers are driven to remove the impurities filtered from the inner surface of the filter screen and scrape them into the collection grooves opened on the inner surface of the filter screen. This ensures that the filter screen can remove the raw material. Workers only need to disassemble and clean the filter screen periodically, without having to disassemble the filter screen after each distillation. Attached Figure Description

[0023] Fig. 1 This is a schematic diagram of the overall external structure of this utility model;

[0024] Fig. 2 This is a schematic diagram of the flip-open structure of this utility model;

[0025] Fig. 3 This is a schematic diagram of the disassembled filter mechanism of this utility model;

[0026] Fig. 4 This is a schematic diagram of the feed distribution plate of this utility model in the disassembled state;

[0027] Fig. 5 This is a schematic diagram of the feed distribution plate structure of this utility model;

[0028] Fig. 6 This utility model Fig. 5 Enlarged structural diagram at point A in the middle.

[0029] In the diagram: 1. Distillation column body; 2. Flip-top; 3. Feed pipe; 4. Filtration mechanism; 5. Placement slot; 6. Filter screen; 7. Filter holes; 8. Circular groove; 9. Collection groove; 10. Scraper; 11. Rotating handle; 12. Feed distribution plate; 13. Installation slot; 14. Rotating groove; 15. Slot; 16. Locking block; 17. Abutment block; 18. Spring; 19. Guide rod; 20. Insertion hole. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figs. 1-6 This utility model provides a technical solution:

[0032] A high-efficiency separation device for dimethyl carbonate distillation column, comprising:

[0033] The flip cover 2 is located above the distillation column body 1 and is used to ensure the airtightness of the inside of the distillation column body 1 when distilling dimethyl carbonate inside the distillation column body 1.

[0034] The filtration unit 4 is located inside the distillation column body 1 and is used to filter the dimethyl carbonate feedstock that enters the distillation column body 1.

[0035] Filter mechanism 4 includes:

[0036] Filter screen 6, which is placed inside the placement slot 5 opened at the top of the distillation column body 1; and

[0037] A scraping assembly for scraping off impurities from the inner surface of the filter screen 6.

[0038] Among them, a removable filter screen 6 is installed inside the upper part of the distillation column body 1. The raw material injected by the feed pipe 3 set at the top of the flip cover 2 is filtered through the filter screen 6 to prevent fixed impurities inside the raw material from precipitating out during the thermal decomposition process and clogging the feeding element inside the distillation column body 1, thereby affecting the normal use of the distillation column body 1.

[0039] Meanwhile, a scraping component is also provided on the surface of the filter screen 6. The sticky impurities on the inner surface of the filter screen 6 are scraped off by the scraping component to ensure the filtration effect of the filter screen 6.

[0040] The scraping components include:

[0041] The scraper 10 is disposed on the outer arc surface of the rotating handle 11 and is used to scrape off the impurities filtered from the bottom surface of the filter screen 6.

[0042] The rotating handle 11 is located inside the filter screen 6 and is used to drive the scraper 10 to rotate.

[0043] The scraper 10 is set on the outer arc surface of the rotating handle 11, and the rotating handle 11 is rotatably set on the inner surface of the filter screen 6. By rotating the rotating handle 11, the scraper 10 is driven to rotate, and impurities or sticky substances on the inner surface of the filter screen 6 are scraped off. The filter holes 7 opened on the inner bottom surface of the filter screen 6 are provided with a collection groove 9 for collecting the impurities scraped off by the scraper 10. Furthermore, the inner wall of the filter screen 6 is provided with an annular groove 8 for limiting the rotation of the scraper 10 and ensuring the stability of the scraper 10 during rotation.

[0044] The top of the flip cover 2 is provided with a feed pipe 3, and the inside of the flip cover 2 is also provided with a material distribution mechanism for distributing raw materials.

[0045] The material sorting mechanism includes:

[0046] The feed distribution plate 12 has a symmetrically arranged locking block 16 on its outer arc surface. The inner wall below the flip cover 2 has a rotating groove 14. The bottom end of the flip cover 2 has a symmetrically arranged mounting groove 13. The locking block 16 is inserted into the inside of the mounting groove 13 and rotates to connect with the inner wall of the rotating groove 14.

[0047] The slot 15 is opened on the inner wall of the rotating groove 14 near the mounting groove 13, and the mounting groove 13 and the slot 15 are staggered. The side wall of the block 16 facing the feed pipe 3 is provided with a stop 17 by a spring 18. The guide rod 19 provided on the side wall of the stop 17 is inserted into the insertion hole 20 opened on the side wall of the block 16.

[0048] Finally, a detachable feed distribution plate 12 is provided at the bottom of the flip cover 2. The feed distribution plate 12 distributes the raw material poured in from above through the feed pipe 3, so as to avoid the impact force generated when the raw material flow is large impacting the filter screen 6 below, causing the filter holes 7 inside the filter screen 6 to deform and affecting the filtration of raw materials.

[0049] Meanwhile, a locking block 16 with an outer arc surface of the feed distribution plate 12 is inserted into the interior of the mounting groove 13, allowing the locking block 16 to enter the interior of the rotating groove 14. By rotating the feed distribution plate 12, the locking block 16 rotates inside the rotating groove 14. The side wall of the locking block 16 is pressed against the interior of the mounting groove 13 by a stop block 17 connected by a spring 18, so that the stop block 17 is in contact with the inner wall of the rotating groove 14. When the locking block 16 rotates into the groove 15 opened on one side of the inner wall of the rotating groove 14, the stop block 17 connected by the spring 18 on the side wall of the locking block 16 is squeezed by the spring 18. The stop block 17 squeezes the inner wall of the rotating groove 14, thus squeezing and fixing the locking block 16 inside the groove 15, ensuring the position of the locking block 16 inside the groove 15, and ensuring the stability of the feed distribution plate 12 during installation.

[0050] Working principle: The worker presses the abutment 17 connected to the outer arc surface of the feed distribution plate 12 by the spring 18 into the mounting groove 13, so that the abutment 17 is in contact with the inner wall of the rotating groove 14. By pressing and rotating the feed distribution plate 12, the abutment 16 on the outer arc surface of the feed distribution plate 12 rotates inside the rotating groove 14. When the abutment 16 rotates into the groove 15 opened on the inner wall of the rotating groove 14 facing the outer side of the feed distribution plate 12, the abutment 16 is squeezed by the spring 18 and enters into the groove 15. The abutment 16 is squeezed by the spring 18 and locked inside the groove 15, ensuring that the abutment 16 will not rotate inside the rotating groove 14, thereby ensuring the stability of the feed distribution plate 12 during installation.

[0051] After the feed distribution plate 12 is installed, the filter screen 6 is placed inside the placement slot 5 at the top of the distillation column body 1. The flip cover 2 is then closed on the top of the distillation column body 1. Raw material is poured into the distillation column body 1 through the feed pipe 3. The feed distribution plate 12 distributes the raw material to avoid the large flow of raw material impacting the filter screen 6 and deforming the filter holes 7 on the surface of the filter screen 6. At the same time, the filter screen 6 filters out the internal impurities of the raw material.

[0052] After the distillation separation is completed, the flip cover 2 is flipped over. The worker rotates the rotating handle 11 so that the scraper 10 scrapes off the fixed impurities or sticky substances on the inner surface of the filter screen 6 and scrapes them into the collection groove 9 opened on the inner surface of the filter screen 6 to collect the fixed impurities and protect the filter screen 6. After cleaning, the subsequent raw materials can be distilled and separated. The worker only needs to disassemble the filter screen 6 for cleaning periodically, without having to clean the filter screen 6 after each distillation.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-efficiency separation device for a dimethyl carbonate distillation column, characterized in that, include: The flip cover (2) is located above the distillation column body (1) to ensure the sealing of the inside of the distillation column body (1) when distilling dimethyl carbonate inside the distillation column body (1); The filtration mechanism (4) is located inside the distillation column body (1) and is used to filter the dimethyl carbonate feedstock that enters the distillation column body (1); The filtration mechanism (4) includes: A filter screen (6) is placed inside a placement slot (5) opened inside the top of the distillation column body (1); and a scraping assembly for scraping off impurities from the inner surface of the filter screen (6). The scraping assembly includes: The scraper (10) is located on the outer arc surface of the rotating handle (11) and is used to scrape off the impurities filtered from the bottom surface of the filter screen (6). The rotating handle (11) is located inside the filter screen (6) and is used to drive the scraper (10) to rotate.

2. The high-efficiency separation device for dimethyl carbonate distillation column according to claim 1, characterized in that: The filter screen (6) has a collection groove (9) on the surface of the filter hole (7) on the bottom inner surface, which is used to collect the impurities scraped off by the scraper (10).

3. The high-efficiency separation device for dimethyl carbonate distillation column according to claim 2, characterized in that: The inner wall of the filter screen (6) is provided with an annular groove (8) for limiting the rotation of the scraper (10).

4. The high-efficiency separation device for dimethyl carbonate distillation column according to claim 1, characterized in that: The top of the flip cover (2) is provided with a feed pipe (3), and the inside of the flip cover (2) is also provided with a material distribution mechanism for distributing raw materials.

5. The high-efficiency separation device for dimethyl carbonate distillation column according to claim 4, characterized in that: The material distribution mechanism includes: The feed distribution plate (12) has a symmetrically arranged locking block (16) on its outer arc surface. The inner wall below the flip cover (2) has a rotating groove (14). The bottom end of the flip cover (2) has a symmetrically arranged mounting groove (13). The locking block (16) is inserted into the inside of the mounting groove (13) and rotates to connect with the inner wall of the rotating groove (14). The slot (15) is located on the inner wall of the rotating groove (14) near the mounting groove (13), and the mounting groove (13) and the slot (15) are staggered.

6. The high-efficiency separation device for dimethyl carbonate distillation column according to claim 5, characterized in that: The side wall of the card block (16) facing the feed pipe (3) is provided with a stop block (17) by a spring (18), and the guide rod (19) provided on the side wall of the stop block (17) is inserted into the insertion hole (20) opened on the side wall of the card block (16).

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