Vacuum unit with steam treatment function for ethylene carbonate

Abstract

The invention relates to the technical field of ethylene carbonate processing, and discloses a vacuum unit with steam treatment for ethylene carbonate, the vacuum unit comprises a heat exchanger, roots pumps are arranged on the left side and the right side of the heat exchanger, and each roots pump comprises a pump body. External water vapor forms high-temperature steam after being heated by the exchanger, ethylene carbonate crystals are heated, dissolved and discharged, after the ethylene carbonate crystals are discharged, condensate water is blown away through nitrogen, a unit returns to normal, equipment faults caused by material ethylene carbonate crystals are effectively treated, and the equipment operation period is prolonged; under the action of the first gear and the tooth grooves, the water barrels on the two sides rotate to shake internal hot water, water vapor is better heated through the spiral cooling fins to form steam, meanwhile, under transmission of the first gear and the second gear, the heat conduction rod drives the wind wheel and the filter screen to rotate, and ethylene carbonate crystals are heated and dissolved.

Description

Technical Field

[0001] The invention relates to the technical field of ethylene carbonate processing, in particular to a vacuum unit with self-contained steam for ethylene carbonate processing. Background Art

[0002] Ethylene carbonate (EC) is an organic solvent with excellent performance, which can dissolve a variety of polymers. It can also be used as an organic intermediate to replace ethylene oxide in dioxygenation reactions, and is the main raw material for the production of dimethyl carbonate by the transesterification method. It can also be used as a raw material for the synthesis of furazolidone, water glass slurry, fiber finishing agent, etc. In addition, it is also used in lithium battery electrolytes. Ethylene carbonate can also be used as an active intermediate for the production of lubricating oils and greases. In the production process of ethylene carbonate, a vacuum unit is required to transport the ethylene carbonate gas phase material. Since the gas phase of the vacuum unit feed contains a small amount of EC, the low-temperature EC crystallizes after entering the pump body and damages the machine pump. Therefore, a vacuum unit with steam treatment for ethylene carbonate is needed to effectively deal with equipment failures caused by the crystallization of ethylene carbonate materials and improve the equipment operation cycle. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a vacuum unit with self-contained steam treatment for ethylene carbonate, which solves the problems raised in the above-mentioned background technology.

[0004] To solve the above technical problems, according to one aspect of the present invention, more specifically, a vacuum unit with self-contained steam treatment for ethylene carbonate includes a heat exchanger, and Roots pumps are provided on the left and right sides of the heat exchanger. The Roots pump includes a pump body, a nitrogen pipe is connected to the front end of the pump body, a steam pipe is connected to one end of the pump body close to the heat exchanger, a connecting pipe is threadedly connected to the outer surface of the steam pipe, and a rubber pad is provided inside the connecting pipe.

[0005] Furthermore, the heat exchanger includes a tank body, a heat dissipation tank is arranged inside the tank body, steam chambers are arranged on the left and right sides of the tank body, an end of the steam chamber away from the tank body is connected to a steam outlet pipe, an inner surface of the connecting pipe is threadedly connected to an outer surface of the steam outlet pipe, a steam inlet pipe is connected to the front of the outer surface of the tank body, a cover edge is integrally formed on the outer surface of the steam chamber, a rubber pad 2 is arranged between the steam chamber and the tank body, a plurality of bolts are threadedly connected inside the rubber pad 2, inside the cover edge and a side of the tank body close to the rubber pad 2, a filter screen is arranged inside the steam chamber, and a rotating drum is fixed to the side of the filter screen close to the tank body.

[0006] Furthermore, the heat dissipation tank includes a fixed cabin, and a water inlet pipe and a water outlet pipe are respectively fixedly penetrated on the upper and lower outer surfaces of the fixed cabin, and the opposite ends of the water inlet pipe and the water outlet pipe are penetrated to the outside of the tank body and are fixedly connected to the tank body, and the left and right sides of the fixed cabin are rotatably connected with water cylinders, and the outer surface of the water cylinder is fixed with heat sinks, and the left and right sides of the fixed cabin are fixed with brackets, and the upper parts of the two brackets are connected with a rotating shaft for common rotation, and the outer surface of the rotating shaft is fixed with a rotating wheel between the two brackets, and the left and right ends of the rotating shaft are fixed with Gear one, the two brackets are rotatably connected with gear two on the opposite sides, the top of gear two is meshed with the bottom of gear one, heat-conducting rods are fixed at the centers of the two opposite sides of the gears two, the opposite ends of the two heat-conducting rods respectively penetrate into the two steam chambers, the left and right sides of the tank body are penetrated with through pipes, the two through pipes are rotatably connected with the two water cylinders respectively, the outer surface of the through pipe is located in the tank body and is penetrated with a plurality of air holes, a partition is fixed inside the fixed cabin, and the left and right ends of the partition are respectively located inside the two water cylinders.

[0007] Furthermore, a wind wheel is fixed on the outer surface of the heat-conducting rod inside the through pipe.

[0008] Furthermore, a rectangular block is fixed to one end of the heat-conducting rod away from the gear 2, and the rectangular block is plugged into the rotating drum.

[0009] Furthermore, the front and rear sides of the partition are both in contact with the inner surface of the water cylinder.

[0010] Furthermore, the inner surface of the water cylinder is provided with a plurality of tooth grooves, and the water cylinder is meshedly connected with the gear through the tooth grooves.

[0011] Furthermore, a scraper strip is threadedly connected to the upper part of the steam cabin.

[0012] The beneficial effects of the vacuum unit with self-contained steam treatment for ethylene carbonate of the present invention are as follows:

[0013] When crystals are present in the Roots pump, the external water vapor is heated by the converter to form high-temperature steam to heat, dissolve and discharge the ethylene carbonate crystals. After the ethylene carbonate crystals are discharged, the condensed water is blown clean with nitrogen, and the unit returns to normal, effectively handling the equipment failure caused by the crystals of the material ethylene carbonate and improving the equipment operation cycle.

[0014] Water vapor enters the tank through the steam inlet pipe, and waste hot water enters the fixed cabin through the water inlet pipe. The flowing hot water makes the impeller rotate. Under the action of gear 1 and the tooth groove, the water cylinders on both sides rotate to shake the internal hot water, and the spiral heat sink heats the water vapor to form steam. At the same time, the heat-conducting rod drives the wind wheel and the filter to rotate under the transmission of gear 1 and gear 2. The wind wheel accelerates the movement of steam, and it is filtered through the filter and enters the Roots pump to heat and dissolve the ethylene carbonate crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the heat exchanger in the present invention;

[0018] Figure 3 Schematic diagram of the internal structure of the heat exchanger in the present invention;

[0019] Figure 4 It is a structural schematic diagram of the heat dissipation tank in the present invention;

[0020] Figure 5 It is a schematic diagram of the internal structure of the heat dissipation tank in the present invention.

[0021] In the figure: 1. Roots pump; 11. Pump body; 12. Nitrogen pipe; 13. Steam pipe; 14. Connecting pipe; 15. Rubber pad 1; 2. Heat exchanger; 21. Tank body; 22. Steam cabin; 23. Steam outlet pipe; 24. Steam inlet pipe; 25. Bolts; 26. Filter screen; 27. Drum; 28. Cover edge; 29. ​​Rubber pad 2; 3. Heat sink; 31. Fixed cabin; 32. Water inlet pipe; 33. Water outlet pipe; 34. Water cylinder; 35. Heat sink; 36. Bracket; 37. Rotating shaft; 38. Rotor; 39. Gear 1; 310. Gear 2; 311. Heat conducting rod; 312. Partition; 313. Through pipe; 314. Air hole; 315. Wind wheel; 316. Rectangular block; 317. Tooth groove. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1-5As shown, according to one aspect of the present invention, a vacuum unit with self-contained steam treatment for ethylene carbonate is provided, comprising a heat exchanger 2, and roots pumps 1 are arranged on the left and right sides of the heat exchanger 2. The roots pump 1 comprises a pump body 11, and the front end of the pump body 11 is connected with a nitrogen pipe 12 connected to an external nitrogen supply device, and the end of the pump body 11 close to the heat exchanger 2 is connected with a steam pipe 13, and the outer surface of the steam pipe 13 is threadedly connected with a connecting pipe 14, and a rubber pad 15 is arranged inside the connecting pipe 14. By arranging the heat exchanger 2 and the nitrogen pipe 12 on the roots pump 1, when there is crystallization in the pump body, the external water vapor is heated by the heat exchanger 2 to form high-temperature steam to heat, dissolve and discharge the ethylene carbonate crystals. After the ethylene carbonate crystals are discharged, the condensed water is blown clean with nitrogen, and the unit returns to normal, effectively handling the equipment failure caused by the crystallization of the material ethylene carbonate, and improving the equipment operation cycle.

[0024] In this embodiment, the heat exchanger 2 includes a tank body 21, a heat dissipation tank 3 is arranged inside the tank body 21, steam chambers 22 are arranged on the left and right sides of the tank body 21, and the end of the steam chamber 22 away from the tank body 21 is connected to a steam outlet pipe 23, the inner surface of the connecting pipe 14 is threadedly connected to the outer surface of the steam outlet pipe 23, and the front of the outer surface of the tank body 21 is connected to a steam inlet pipe 24, which is connected to an external water vapor supply device. A cover edge 28 is integrally formed on the outer surface of the steam chamber 22, and a rubber pad 29 is arranged between the steam chamber 22 and the tank body 21. A plurality of bolts 25 are threadedly connected inside the rubber pad 29, inside the cover edge 28 and one side of the tank body 21 close to the rubber pad 29, and a filter screen 26 is arranged inside the steam chamber 22, and a rotating drum 27 is fixed to the side of the filter screen 26 close to the tank body 21.

[0025] In this embodiment, the heat dissipation tank 3 includes a fixed cabin 31, and a water inlet pipe 32 and a water outlet pipe 33 are respectively fixed on the upper and lower outer surfaces of the fixed cabin 31, and the opposite ends of the water inlet pipe 32 and the water outlet pipe 33 are both penetrated to the outside of the tank body 21, and are both fixedly connected to the tank body 21, and the left and right sides of the fixed cabin 31 are rotatably connected with water cylinders 34, and the outer surface of the water cylinder 34 is fixed with heat sinks 35, and the left and right sides of the fixed cabin 31 are fixed with brackets 36, and the upper and lower parts of the two brackets 36 are rotatably connected with a rotating shaft 37, and the outer surface of the rotating shaft 37 is located between the two brackets 36 and a rotating wheel 38 is fixed, and the left and right ends of the rotating shaft 37 are fixed with gears 1 39, and the opposite sides of the two brackets 36 are rotatably connected with gears 2 310, and the top of the gear 2 310 is meshed with the bottom of the gear 1 39, and the two gears 2 310 are opposite to each other. A heat conducting rod 311 is fixed at the center, and the opposite ends of the two heat conducting rods 311 respectively penetrate into the two steam chambers 22. Through pipes 313 are penetrated and connected on the left and right sides of the tank body 21. The two through pipes 313 are rotatably connected to the two water cylinders 34 respectively. The outer surface of the through pipe 313 is located inside the tank body 21 and penetrates and opens a plurality of air holes 314. A partition 312 is fixed inside the fixed cabin 31. The left and right ends of the partition 312 are respectively located inside the two water cylinders 34. The partition 312 divides the interior of the fixed cabin 31 into two spaces. After hot water enters, it cannot directly fall and be discharged from the water outlet pipe 33. It needs to flow along the left and right sides of the partition 312 into the two water cylinders 34, and flow down from the gap between the partition 312 and the vertical cylinder, and finally enter the bottom of the fixed cabin 31 and be discharged, so that the hot water can better contact with the water cylinder 34 for heat exchange.

[0026] In this embodiment, a wind wheel 315 is fixed on the outer surface of the heat-conducting rod 311 inside the through pipe 313. The wind wheel 315 rotates under the drive of the heat-conducting rod 311 to drive the heated steam to accelerate the discharge flow.

[0027] In this embodiment, a rectangular block 316 is fixed to one end of the heat-conducting rod 311 away from the gear 2 310, and the rectangular block 316 is plugged into the rotating drum 27. A scraper strip 210 is threadedly connected to the upper part of the steam chamber 22, so that the heat-conducting rod 311 can rotate to rotate the filter screen 26 through the rectangular block 316 and the rotating drum 27, and the surface of the filter screen 26 can be cleaned under the action of the scraper strip 210, thereby reducing the clogging of the filter screen by the particles filtered in the steam and affecting the steam flow rate.

[0028] In this embodiment, the front and rear sides of the partition 312 are in contact with the inner surface of the water cylinder 34. When the partition 312 and the water cylinder 34 rotate, the inner wall of the water cylinder 34 can be scraped and cleaned to reduce the adhesion of impurities on the inner wall of the water cylinder 34 and reduce the influence on the heat exchange efficiency.

[0029] In this embodiment, a plurality of tooth grooves 317 are formed on the inner surface of the water cylinder 34 , and the water cylinder 34 is meshedly connected with the gear 1 39 via the tooth grooves 317 .

[0030] The working principle of this device is: when there is crystallization in the Roots pump 1, the external water vapor is heated by the converter 2 to form high-temperature steam to heat and dissolve the ethylene carbonate crystals and discharge them. After the ethylene carbonate crystals are discharged, the condensed water is blown clean with nitrogen, and the unit returns to normal, effectively handling the equipment failure caused by the crystallization of ethylene carbonate and improving the equipment operation cycle;

[0031] Water vapor enters the tank body 21 through the steam inlet pipe 24, and waste hot water enters the fixed cabin 31 through the water inlet pipe 32. The flowing hot water causes the impeller 38 to rotate, and under the action of gear 1 39 and tooth groove 317, the water cylinders 34 on both sides rotate to shake the internal hot water (increasing the fluidity and mixing degree of water, making the heat more evenly distributed in the entire water body, reducing the temperature gradient, improving the heat conduction efficiency, and reducing the formation of scale and sediment, avoiding scale and sediment from reducing the heat transfer efficiency), and the spiral heat sink 35 is used to better heat the water vapor to form steam. At the same time, under the transmission of gear 1 39 and gear 2 310, the heat conducting rod 311 drives the wind wheel 315 and the filter screen 26 to rotate. The wind wheel 315 allows the steam to move faster and be filtered through the filter screen 26 into the Roots pump 1 to heat and dissolve the ethylene carbonate crystals.

[0032] 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 vacuum unit for treating ethylene carbonate with its own steam, comprising a heat exchanger (2), characterized in that: A Roots pump (1) is provided on both the left and right sides of the heat exchanger (2), the Roots pump (1) comprising a pump body (11), the front end of the pump body (11) being connected to a nitrogen pipe (12), the end of the pump body (11) close to the heat exchanger (2) being connected to a steam pipe (13), the outer surface of the steam pipe (13) being threadedly connected to a connecting pipe (14), the interior of the connecting pipe (14) being provided with a rubber pad (15).

2. A vacuum unit with self-contained steam for treating ethylene carbonate according to claim 1, characterized in that: The heat exchanger (2) comprises a tank body (21), a heat dissipation tank (3) is arranged inside the tank body (21), steam chambers (22) are arranged on the left and right sides of the tank body (21), one end of the steam chamber (22) away from the tank body (21) is connected to a steam outlet pipe (23), the inner surface of the connecting pipe (14) is threadedly connected to the outer surface of the steam outlet pipe (23), the front of the outer surface of the tank body (21) is connected to a steam inlet pipe (24), and the outer surface of the steam chamber (22) is connected to the outer surface of the steam chamber (22). A cover edge (28) is integrally formed on the surface; a rubber pad (29) is provided between the steam chamber (22) and the tank body (21); a plurality of bolts (25) are threadedly connected inside the rubber pad (29), inside the cover edge (28) and a side of the tank body (21) close to the rubber pad (29); a filter screen (26) is provided inside the steam chamber (22); a rotating drum (27) is fixed on a side of the filter screen (26) close to the tank body (21).

3. A vacuum unit for treating ethylene carbonate with self-contained steam according to claim 2, characterized in that: The heat dissipation tank (3) comprises a fixed cabin (31), and a water inlet pipe (32) and a water outlet pipe (33) are respectively penetrated and fixed on the upper and lower sides of the outer surface of the fixed cabin (31), and the opposite ends of the water inlet pipe (32) and the water outlet pipe (33) are penetrated to the outside of the tank body (21) and are fixedly connected to the tank body (21). The left and right sides of the fixed cabin (31) are rotatably connected with water cylinders (34), and the outer surface of the water cylinder (34) is fixed with heat dissipation fins (35). The left and right sides of the fixed cabin (31) are fixed with brackets (36), and the upper parts of the two brackets (36) are connected to a rotating shaft (37) for common rotation. The outer surface of the rotating shaft (37) is fixed with a rotating wheel (38) between the two brackets (36), and the left and right ends of the rotating shaft (37) are fixed with gears (39). The two brackets (36) are rotatably connected to the opposite sides of the two brackets (36), and the top of the gear two (310) is meshed with the bottom of the gear one (39). A heat-conducting rod (311) is fixed at the center of the opposite sides of the two gear twos (310). The opposite ends of the two heat-conducting rods (311) respectively penetrate into the two steam chambers (22). The left and right sides of the tank body (21) are penetrated by through pipes (313). The two through pipes (313) are rotatably connected to the two water cylinders (34). The outer surface of the through pipe (313) is located in the tank body (21) and is penetrated by a plurality of air holes (314). A partition (312) is fixed inside the fixed cabin (31), and the left and right ends of the partition (312) are respectively located inside the two water cylinders (34).

4. A vacuum unit with self-contained steam for treating ethylene carbonate according to claim 3, characterized in that: A wind wheel (315) is fixed on the outer surface of the heat-conducting rod (311) inside the through pipe (313).

5. The vacuum unit for treating ethylene carbonate with self-contained steam according to claim 3, characterized in that: A rectangular block (316) is fixed to one end of the heat-conducting rod (311) away from the second gear (310), and the rectangular block (316) is plugged into the rotating drum (27).

6. A vacuum unit with self-contained steam for treating ethylene carbonate according to claim 3, characterized in that: The front and rear sides of the partition plate (312) are both in contact with the inner surface of the water cylinder (34).

7. The vacuum unit for treating ethylene carbonate with self-contained steam according to claim 3, characterized in that: The inner surface of the water cylinder (34) is provided with a plurality of tooth grooves (317), and the water cylinder (34) is meshedly connected with the gear 1 (39) via the tooth grooves (317).

8. The vacuum unit for treating ethylene carbonate with self-contained steam according to claim 2, characterized in that: A scraper strip (210) is threadedly connected to the upper part of the interior of the steam chamber (22).

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