A gas phase feed distillation tower for ethylene carbonate

Abstract

The invention relates to the technical field of distillation towers, and discloses a gas-phase feed distillation tower for ethylene carbonate, comprising a distillation tower body, wherein a heat exchanger is connected on the left side of the distillation tower body, wherein the heat exchanger comprises a heat exchange tank, a feed tank is fixed on the left side of the heat exchange tank, a feed port is fixed through the left side of the feed tank, and an inner tube is integrally formed on the right side of the heat exchange tank. When the invention is used, a gas-phase material is driven by an external device to enter the feed tank, and drives a rotating wheel to rotate, and a pipe sleeve and a spiral heat exchange plate are reciprocated by two incomplete gears, a gear three, a rotating rod one, a gear two, and a plurality of gears one in sequence, thereby increasing the fluidity and mixing degree of water, making the heat more evenly distributed in the entire water body, reducing the temperature gradient, and improving the heat conduction efficiency. The agitated water flow can reduce the formation of scale and sediment, and prevent the scale and sediment from reducing the heat transfer efficiency of the heat exchanger.

Description

Technical Field

[0001] The invention relates to the technical field of distillation towers, in particular to a gas-phase feed distillation tower for ethylene carbonate. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. It uses the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, to transfer the light components (low-boiling substances) in the liquid phase to the gas phase, and the heavy components (high-boiling substances) in the gas phase to the liquid phase, thereby achieving the purpose of separation.

[0003] The traditional feeding method is liquid phase feeding. Ethylene carbonate is condensed in the thin film evaporator, buffered in the storage tank, and then pumped into the feed port. Liquid phase feeding has high energy consumption. However, with gas phase feeding, the steam consumption of the falling film reboiler in the tower bottom is significantly reduced, and the energy saving effect is remarkable.

[0004] Before the distillation of ethylene carbonate, the gaseous material gas may contain impurities, particulate matter or other unnecessary components. These impurities may affect the efficiency of the distillation process and the product quality, and may even damage the distillation tower itself. The distillation efficiency can be improved by preheating the gaseous material. Therefore, filtering the gas before it enters the distillation tower can remove these impurities, ensure that the gas entering the distillation tower is pure, and preheat it to improve the distillation efficiency, distillation effect and product quality. However, due to the long-term filling of waste hot water in the heat exchanger, it is easy to cause internal accumulation and scale to affect the heat exchange efficiency and production efficiency. Therefore, a gas-phase feed distillation tower for ethylene carbonate is needed to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a gas-phase feed distillation tower for ethylene carbonate, which solves the problems raised in the above-mentioned background technology.

[0006] To solve the above technical problems, according to one aspect of the present invention, more specifically, a gas-phase feed distillation tower for ethylene carbonate comprises a distillation tower body, a heat exchanger is connected to the left side of the distillation tower body, the heat exchanger comprises a heat exchange tank, a feed tank is fixed on the left side of the heat exchange tank, a feed port is fixed through the left side of the feed tank, an inner tube is integrally formed on the right side of the heat exchange tank, a discharge tank is sleeved on the outer surface of the inner tube, a discharge port is fixed through the right side of the discharge tank, a water inlet is fixed through the upper surface of the heat exchange tank, a water outlet is fixed through the lower surface of the outer surface of the heat exchange tank, the discharge tank and the inner tube are jointly provided with a plurality of screw holes, an annular limiting ring is integrally formed on the inner surface of the discharge tank, a filter element is provided inside the inner tube, a gear ring 1 is fixed on the left side of the filter element, a plurality of heat exchange tubes are fixed through the inside of the heat exchange tank, the left end of the heat exchange tube extends to the inside of the feed tank, and the right end of the heat exchange tube extends to the right side of the heat exchange tank.

[0007] Furthermore, the outer surface of the heat exchange tube is located inside the heat exchange tank and is rotatably connected to a tube sleeve, a heat exchange plate is fixed to the outer surface of the tube sleeve, a gear one is fixed to the left side of the outer surface of the tube sleeve, and a plurality of gears one are meshed and connected with gear two, a rotating rod one is fixed at the left center of the gear two, the left end of the rotating rod one passes through the interior of the feed tank and is fixed with gear three, two brackets are fixed inside the feed tank, the two brackets are rotatably connected with a rotating shaft, a rotating wheel is fixed to the outer surface of the rotating shaft between the two brackets, the front and rear ends of the rotating shaft respectively pass through the opposite sides of the two brackets, and both are fixed with incomplete gears.

[0008] Furthermore, a gear ring 2 is rotatably connected to the left and right sides of the inside of the heat exchange tank, and a plurality of scraper strips 1 are fixed between the two gear rings 2. A gear 4 is rotatably connected to the inner side of the gear ring 2 located on the right side below the right side of the heat exchange tank, and a rotating rod 2 is fixed to the middle of the gear 4. The right end of the rotating rod 2 passes through the inside of the inner tube and is fixed with a gear 5. A scraper strip 2 is fixed to the inside of the inner tube on the right side of the heat exchange tank, and a scraper strip 3 is fixed to the inside of the limiting ring.

[0009] Furthermore, the left side of the scraper strip three is in contact with the right side of the filter element, the right side of the scraper strip two is in contact with the left side of the filter element, and the opposite ends of the scraper strips one are in contact with the inner surface of the heat exchange tank.

[0010] Furthermore, a pillar is fixed on the right side of gear 2, a plurality of slideways are provided on the outer surface of the pillar, a guide rod is fixed inside the slideway, a slide is slidably connected to the outer surface of the guide rod, and the slide is rotatably connected to two rollers on the side away from the pillar, and the two rollers are respectively located on both sides of the blades of the heat exchange plate.

[0011] Furthermore, the outer surface of the roller is provided with bristles, and the roller is in contact with the outer surface of the heat exchange plate through the bristles.

[0012] Furthermore, the two incomplete gears are arranged in a staggered manner, and the two incomplete gears are three-phase compatible with the gear.

[0013] Furthermore, the inner side walls of the gear ring 1 and the two gear rings 2 are each provided with a plurality of tooth grooves, the gear ring 2 on the left is meshedly connected with the gear 1 via the tooth grooves, the gear ring 2 on the right is meshedly connected with the gear 4 via the tooth grooves, and the gear ring 1 is meshedly connected with the gear 5 via the tooth grooves.

[0014] The beneficial effects of the gas phase feed distillation tower for ethylene carbonate of the present invention are:

[0015] When the present invention is used, the gas phase material is driven by an external device to enter the feed tank, and drives the rotating wheel to rotate. The pipe sleeve and the spiral heat exchange plate are driven to reciprocate by two incomplete gears, gear three, rotating rod one, gear two, and multiple gears one in sequence, thereby increasing the fluidity and mixing degree of water, making the heat more evenly distributed in the entire water body, reducing the temperature gradient, and improving the heat conduction efficiency; and reducing the formation of scale and sediment, so as to avoid the scale and sediment reducing the heat transfer efficiency of the heat exchanger;

[0016] At the same time, driven by gear ring 2, scraper bar 1 rotates to clean the inner wall of the heat exchange tank to avoid scale accumulation, and the filter element rotates under the sequential transmission of gear 4, rotating rod 2, gear 5 and gear ring 1. The rotating filter element can better filter and separate impurities when the gas phase material passes through the filter element, and the surface of the filter element is cleaned by fixed scraper bar 2 and scraper bar 3 to reduce impurity clogging and increase the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the heat exchanger in the present invention;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of a heat exchange tank and a feed tank in the present invention;

[0021] Figure 4 is a schematic cross-sectional structural diagram of a heat exchanger in the present invention;

[0022] Figure 5 For the present invention Figure 4 A front cross-sectional structural schematic diagram of;

[0023] Figure 6 Schematic diagram of the internal structure of the heat exchanger of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the filter element and the gear ring 1 in the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the support and the roller in the present invention.

[0026] In the figure: 1. distillation tower body; 2. heat exchanger; 3. heat exchange tank; 4. feed tank; 5. feed port; 6. discharge tank; 7. discharge port; 8. water inlet; 9. water outlet; 10. inner tube; 11. screw hole; 12. limit ring; 13. filter element; 14. gear ring one; 15. heat exchange tube; 16. pipe sleeve; 17. heat exchange plate; 18. gear one; 19. gear two; 20. rotating rod one; 21. gear three; 22. bracket; 23. rotating shaft; 24. rotating wheel; 25. incomplete gear; 26. gear ring two; 27. scraper one; 28. pillar; 29. ​​slideway; 30. guide rod; 31. slide; 32. roller; 33. gear four; 34. rotating rod two; 35. gear five; 36. scraper two; 37. scraper three. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0028] like Figure 1-8 As shown, according to one aspect of the present invention, a gas-phase feed distillation tower for ethylene carbonate is provided, comprising a distillation tower body 1, a heat exchanger 2 is connected to the left side of the distillation tower body 1, the heat exchanger 2 comprises a heat exchange tank 3, a feed tank 4 is fixed to the left side of the heat exchange tank 3, a feed port 5 is fixed through the left side of the feed tank 4, an inner tube 10 is integrally formed on the right side of the heat exchange tank 3, a discharge tank 6 is sleeved on the outer surface of the inner tube 10, a discharge port 7 is fixed through the right side of the discharge tank 6, a water inlet 8 is fixed through the upper surface of the heat exchange tank 3, a water outlet 9 is fixed through the lower surface of the outer surface of the heat exchange tank 3, a plurality of screw holes 11 are provided together with the discharge tank 6 and the inner tube 10, and an annular limiting ring 12 is integrally formed on the inner surface of the discharge tank 6, A filter element 13 is provided inside the inner tube 10. By installing bolts in the screw holes 11, the heat exchange tank 3 is installed and connected with the discharge tank 6, and the filter element 13 can be easily replaced. A gear ring 14 is fixed on the left side of the filter element 13. A plurality of heat exchange tubes 15 are fixed through the heat exchange tank 3. The left end of the heat exchange tube 15 extends to the inside of the feed tank 4, and the right end of the heat exchange tube 15 extends to the right side of the heat exchange tank 3. The water inlet 8 is connected to the external waste hot water pipe. The waste hot water enters the heat exchange tank 3 through the water inlet 8 and is discharged through the water outlet 9. The feed port 5 is used for gas phase material to enter. After being preheated by the heat exchange tube 15 and filtered and separated by the filter element 13, the pure gas phase material after heating enters the distillation tower body 1 through the discharge port 7 for distillation.

[0029] In this embodiment, the outer surface of the heat exchange tube 15 is located inside the heat exchange tank 3 and is rotatably connected to a sleeve 16. A heat exchange plate 17 is fixed to the outer surface of the sleeve 16. A gear 18 is fixed to the left side of the outer surface of the sleeve 16. A plurality of gears 18 are meshed and connected to a gear 2 19. A rotating rod 1 20 is fixed at the center of the left side of the gear 2 19. The left end of the rotating rod 1 20 passes through the inside of the feed tank 4 and is fixed with a gear 3 21. Two brackets 22 are fixed inside the feed tank 4. The two brackets 22 are rotatably connected to a rotating shaft 23. The outer surface of the rotating shaft 23 A rotating wheel 24 is fixed between the two brackets 22, and the front and rear ends of the rotating shaft 23 respectively penetrate the opposite sides of the two brackets 22, and are fixed with incomplete gears 25. The contact area with the hot water is increased by the pipe sleeve 16 and the spiral heat exchange plate 17, and the reciprocating rotation increases the fluidity and mixing degree of the water, so that the heat is more evenly distributed in the entire water body, reducing the temperature gradient, thereby improving the efficiency of heat conduction, thereby improving the heat exchange efficiency; and reducing the formation of scale and sediment, avoiding scale and sediment from reducing the heat transfer efficiency of the heat exchanger 2.

[0030] In this embodiment, the left and right sides of the heat exchange tank 3 are rotatably connected with the gear ring 26, and a plurality of scraper strips 1 27 are fixed between the two gear rings 26. A gear 4 33 is rotatably connected to the inner side of the gear ring 26 located on the right side below the right side of the heat exchange tank 3. A rotating rod 2 34 is fixed to the middle of the gear 4 33. The right end of the rotating rod 2 34 passes through the inner tube 10 and is fixed with a gear 5 35. A scraper strip 2 36 is fixed inside the inner tube 10 on the right side of the heat exchange tank 3, and a scraper strip 3 37 is fixed inside the limiting ring 12.

[0031] In this embodiment, the left side of scraper strip three 37 is in contact with the right side of filter element 13, the right side of scraper strip two 36 is in contact with the left side of filter element 13, and the opposite ends of multiple scraper strips 27 are in contact with the inner surface of heat exchange tank 3. Scraper strip three 37 and scraper strip two 36 will clean the right side and left side of filter element 13 respectively when filter element 13 rotates, thereby reducing blockage and improving filtering effect. Scraper strip one 27 rotates with gear ring two 26 to clean the inner wall of heat exchange tank 3, thereby reducing scale adhesion and corrosion.

[0032] In this embodiment, a pillar 28 is fixed to the right side of the gear 2 19, and a plurality of slideways 29 are provided on the outer surface of the pillar 28. A guide rod 30 is fixed inside the slideway 29. A slide 31 is slidably connected to the outer surface of the guide rod 30. The side of the slide 31 away from the pillar 28 is rotatably connected to two rollers 32. The two rollers 32 are respectively located on both sides of the blades of the heat exchange plate 17. When the heat exchange plate 17 rotates, the rollers 32 are pushed against to make the slide 31 slide along the guide rod 30, and the surface of the heat exchange plate 17 is cleaned by the rollers 32.

[0033] In this embodiment, the outer surface of the roller 32 is provided with bristles, and the roller 32 fits against the outer surface of the heat exchange plate 17 through the bristles, so that when the roller 32 moves on the spiral blades of the heat exchange plate 17, the surface can be wiped and cleaned.

[0034] In this embodiment, the two incomplete gears 25 are staggered front and back, and the two incomplete gears 25 are adapted to the gear three 21. The two incomplete gears 25 are meshed and connected after contacting the gear three 21, and due to the staggered arrangement, they will not contact the gear three 21 at the same time, so that when the rotating wheel 24 drives the two incomplete gears 25 to rotate continuously, the gear three 21 can be rotated forward and reversely through the two incomplete gears 25.

[0035] In this embodiment, a plurality of tooth grooves are provided on the inner side walls of the gear ring 14 and the two gear rings 26. The gear ring 26 on the left side is meshed and connected with the gear 18 via the tooth grooves, and the gear ring 26 on the right side is meshed and connected with the gear 4 33 via the tooth grooves. The gear ring 14 is meshed and connected with the gear 5 35 via the tooth grooves. When the gear 18 rotates, the gear rings 26 on both sides and the multiple scraper strips 1 27 are rotated through meshing. The gear ring 2 26 on the right side rotates the gear 4 33, and rotates the gear ring 14 and the filter element 13 through the gear 5 35.

[0036] The working principle of the device is as follows: when in use, the gas phase material is driven by an external device to enter the feed tank 4, and drives the wheel 24 to rotate, and the two incomplete gears 25, the gear three 21, the rotating rod 1 20, the gear two 19, and the multiple gears 1 18 are sequentially driven to make the pipe sleeve 16 and the spiral heat exchange plate 17 reciprocate, thereby increasing the fluidity and mixing degree of water, making the heat more evenly distributed in the entire water body, reducing the temperature gradient, and improving the heat conduction efficiency; and reducing the formation of scale and sediment, so as to avoid the scale and sediment reducing the heat transfer efficiency of the heat exchanger 2;

[0037] At the same time, driven by the gear ring 26, the scraper bar 1 27 rotates to clean the inner wall of the heat exchange tank 3 to avoid scale accumulation, and the filter element 13 is rotated under the sequential transmission of the gear 4 33, the rotating rod 2 34, the gear 5 35, and the gear ring 1 14. The rotating filter element 13 can better filter and separate impurities when the gas phase material passes through the filter element 13, and the surface of the filter element 13 is cleaned by the fixed scraper bar 2 36 and the scraper bar 3 37 to reduce the clogging of impurities and increase the service life of the filter element 13.

[0038] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A gas-phase feed distillation tower for ethylene carbonate, comprising a distillation tower body (1), characterized in that: The left side of the distillation tower body (1) is connected to a heat exchanger (2), and the heat exchanger (2) includes a heat exchange tank (3). A feed tank (4) is fixed on the left side of the heat exchange tank (3), and a feed port (5) is fixedly penetrated on the left side of the feed tank (4). An inner tube (10) is integrally formed on the right side of the heat exchange tank (3), and a discharge tank (6) is sleeved on the outer surface of the inner tube (10), and a discharge port (7) is fixedly penetrated on the right side of the discharge tank (6). A water inlet (8) is fixedly penetrated above the upper surface of the heat exchange tank (3), and a water inlet (8) is fixedly penetrated on the lower surface of the outer surface of the heat exchange tank (3). A water outlet (9) is fixedly passed through the surface, the discharge tank (6) and the inner tube (10) are provided with a plurality of screw holes (11), the inner surface of the discharge tank (6) is integrally formed with an annular limiting ring (12), a filter element (13) is provided inside the inner tube (10), a gear ring (14) is fixed on the left side of the filter element (13), a plurality of heat exchange tubes (15) are fixedly passed through the inside of the heat exchange tank (3), the left end of the heat exchange tube (15) extends to the inside of the feed tank (4), and the right end of the heat exchange tube (15) extends to the right side of the heat exchange tank (3); The outer surface of the heat exchange tube (15) is located inside the heat exchange tank (3) and is rotatably connected to a tube sleeve (16). A heat exchange plate (17) is fixed to the outer surface of the tube sleeve (16). A gear one (18) is fixed on the left side of the outer surface of the tube sleeve (16). A plurality of gears one (18) are meshed and connected with a gear two (19). A rotating rod one (20) is fixed at the center of the left side of the gear two (19). The left end of the rotating rod one (20) passes through the inside of the feed tank (4) and is fixed with a gear three (21). Two brackets (22) are fixed inside the feed tank (4). The two brackets (22) are rotatably connected with a rotating shaft (23). A rotating wheel (24) is fixed on the outer surface of the rotating shaft (23) between the two brackets (22). The front and rear ends of the rotating shaft (23) respectively pass through the opposite sides of the two brackets (22) and are both fixed with incomplete gears (25). A pillar (28) is fixed on the right side of the gear 2 (19), a plurality of slideways (29) are provided on the outer surface of the pillar (28), a guide rod (30) is fixed inside the slideway (29), a slide rack (31) is slidably connected to the outer surface of the guide rod (30), and two rollers (32) are rotatably connected to the side of the slide rack (31) away from the pillar (28), and the two rollers (32) are respectively located on both sides of the blades of the heat exchange plate (17); The outer surface of the roller (32) is provided with bristles, and the roller (32) is in contact with the outer surface of the heat exchange plate (17) through the bristles; The two incomplete gears (25) are arranged alternately in front and back, and both of the incomplete gears (25) are compatible with the gear three (21).

2. A gas-phase feed distillation tower for ethylene carbonate according to claim 1, characterized in that: The left and right sides of the heat exchange tank (3) are both rotatably connected to a gear ring 2 (26), and a plurality of scraper strips 1 (27) are fixed between the two gear rings 2 (26). A gear 4 (33) is rotatably connected to the inner side of the gear ring 2 (26) located on the right side below the right side of the heat exchange tank (3). A rotating rod 2 (34) is fixed to the middle of the gear 4 (33). The right end of the rotating rod 2 (34) passes through the inside of the inner tube (10) and is fixed to a gear 5 (35). A scraper strip 2 (36) is fixed to the inside of the inner tube (10) on the right side of the heat exchange tank (3), and a scraper strip 3 (37) is fixed to the inside of the limiting ring (12).

3. A gas-phase feed distillation tower for ethylene carbonate according to claim 2, characterized in that: The left side of the scraper strip three (37) is in contact with the right side of the filter element (13), the right side of the scraper strip two (36) is in contact with the left side of the filter element (13), and the opposite ends of the scraper strips one (27) are in contact with the inner surface of the heat exchange tank (3).

4. A gas-phase feed distillation tower for ethylene carbonate according to claim 2, characterized in that: The inner side walls of the gear ring 1 (14) and the two gear rings 2 (26) are each provided with a plurality of tooth grooves. The gear ring 2 (26) on the left side is meshedly connected with the gear 1 (18) via the tooth grooves, the gear ring 2 (26) on the right side is meshedly connected with the gear 4 (33) via the tooth grooves, and the gear ring 1 (14) is meshedly connected with the gear 5 (35) via the tooth grooves.

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