CN220091345U - Device for producing electronic-grade cyclic carbonate - Google Patents
Device for producing electronic-grade cyclic carbonate Download PDFInfo
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- CN220091345U CN220091345U CN202321080143.9U CN202321080143U CN220091345U CN 220091345 U CN220091345 U CN 220091345U CN 202321080143 U CN202321080143 U CN 202321080143U CN 220091345 U CN220091345 U CN 220091345U
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- outlet
- falling film
- reflux
- pump
- tower
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- 150000005676 cyclic carbonates Chemical class 0.000 title claims abstract description 16
- 239000011552 falling film Substances 0.000 claims abstract description 48
- 238000007670 refining Methods 0.000 claims abstract description 41
- 238000010992 reflux Methods 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 12
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 10
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 8
- 239000012071 phase Substances 0.000 description 8
- 239000011521 glass Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 239000011364 vaporized material Substances 0.000 description 1
Abstract
The utility model relates to a device for producing electronic grade cyclic carbonate, which comprises a falling film evaporator (E1), a gas-liquid separator (V1), a refining tower (T1), a heat pump unit (P1), a falling film reboiler (E2), a aftercooler (E3), a reflux tank (V2), a reflux pump (P2), a vacuum pump (P3) and a tower kettle pump (P4). The utility model can reduce the consumption of steam and circulating water in the production process, and has low production energy consumption and production cost and high product quality.
Description
Technical Field
The utility model relates to the field of carbonate production, in particular to a device for producing electronic-grade cyclic carbonate.
Background
Cyclic carbonates such as propylene carbonate and ethylene carbonate are important organic synthesis intermediates, are important raw materials for producing dimethyl carbonate, and electronic grade products of the cyclic carbonates are widely used as battery solvents in battery electrolyte.
In the traditional electronic grade propylene carbonate/ethylene carbonate production device, propylene oxide/ethylene oxide is used as a raw material, a mixture of propylene carbonate/ethylene carbonate and a catalyst is obtained through reaction, part of propylene carbonate/ethylene carbonate is vaporized by heating, the vaporized material is condensed by a condenser, and the condensed material is conveyed to a refining tower in a liquid phase state by a pump for refining. The reboiler of the refining tower uses steam for heating, and the circulating water is used for condensing the gas phase materials at the top of the tower. Because the electronic grade propylene carbonate/ethylene carbonate has high quality requirement, the reflux ratio of the refining tower is large, the heat load is high, a large amount of steam and circulating water are consumed in the production process, and the production energy consumption and the production cost are high.
Disclosure of Invention
Aiming at the defects of the situations, the utility model provides a device for producing electronic grade cyclic carbonate, which has the advantages of reduced steam and circulating water consumption, reduced production energy consumption and production cost, high product quality and completely meeting the requirements of electronic grade products.
The utility model relates to a device for producing electronic grade cyclic carbonate, which adopts the technical proposal that: the device for producing the electronic-grade cyclic carbonate comprises a falling film evaporator (E1), a gas-liquid separator (V1), a refining tower (T1), a heat pump unit (P1), a falling film reboiler (E2), a back cooler (E3), a reflux tank (V2), a reflux pump (P2), a vacuum pump (P3) and a tower kettle pump (P4), wherein the top inlet of the falling film evaporator (E1) is connected with a feed pipeline, the bottom outlet of the falling film evaporator (E1) and the gas-liquid separator (V1) are connected with a catalyst recovery tank, the top outlet of the falling film evaporator (E1) is connected with the inlet of the refining tower (T1), the top outlet of the refining tower (T1) is connected with the inlet of the heat pump unit (P1), the outlet of the heat pump unit (P1) is connected with the hot side inlet of the falling film, the cold side reboiler (E2) is connected with the back cooler (E3), the bottom outlet of the falling film evaporator (E1) is connected with the back side reboiler (E3), the back side outlet of the back cooler (E2) is connected with the back side of the reflux pump (T2), the back side outlet of the back cooler (E2) is connected with the back cooler (E2), the back side outlet of the back cooler (E2 is connected with the back cooling pump (E2) is connected with the back cooling pump (T2) is connected with the back cooling pump (P2) inlet, the outlet of the reflux pump (P2) is connected with the outlet of the tower kettle pump (P4), the outlet of the tower kettle of the refining tower (T1) is connected with the inlet of the tower kettle pump (P4), the outlet of the tower kettle pump (P4) is connected with the cold side inlet of the top of the falling film reboiler (E2), the outlet of the falling film reboiler (E2) after the cold side heat exchange is connected with the tower kettle of the refining tower (T1), the outlet of the tower kettle pump (P4) is connected with an industrial grade product extraction pipeline, and the side outlet of the refining tower (T1) is connected with an electronic grade product extraction pipeline.
Preferably, the gas phase outlet at the top of the gas-liquid separator (V1) is directly connected with the feed inlet of the refining tower (T1) through a pipeline, and the refining tower (T1) adopts a gas phase feed mode.
Preferably, the heat pump unit (P1) adopts a variable frequency motor (d), an outlet pipeline of the heat pump unit is provided with a pressure gauge (c), and the pressure gauge (c) and the variable frequency motor (d) are provided with instrument control interlocks.
Preferably, the hot side of the falling film reboiler (E2) is provided with a noncondensable gas exhaust regulating valve (b) and is connected to a reflux drum (V2) through a pipeline.
Preferably, a sight glass (a) is arranged on a connecting pipeline from the bottom outlet of the falling film evaporator (E1) and the gas-liquid separator (V1) to the catalyst recovery tank, the installation elevation of the falling film evaporator (E1) and the gas-liquid separator (V1) is the same, and the installation elevation of the falling film evaporator (E1) and the gas-liquid separator (V1) is 12-25 m greater than the elevation of the top of the catalyst recovery tank.
The utility model has the advantages and beneficial effects that: the refining tower adopts a gas-phase feeding mode, so that the steam consumption of a reboiler of the refining tower is reduced, meanwhile, the equipment investment of a condenser, a feed pump and the like is saved, and the circulating water consumption for condensation is reduced; the heat pump unit is adopted in the refining tower, the tower bottom is heated by recovering the heat of the tower top, so that the steam consumption of a reboiler and the circulating water consumption of a tower top condenser are reduced, and the energy consumption in the production process is reduced; and meanwhile, according to the heat exchange condition of the reboiler and the product quality in the use process, the outlet pressure of the heat pump unit is adjusted through the heat pump variable frequency motor, so that the temperature of the material at the outlet of the heat pump is as low as possible under the condition of meeting the heat exchange, and the product quality and the product yield are ensured.
Drawings
Fig. 1 is a schematic structural view of the present utility model. Reference numerals: e1 falling film evaporator, V1 gas-liquid separator, T1 refining tower, P1 heat pump unit, E2 falling film reboiler, E3 aftercooler, V2 reflux tank, P2 reflux pump, P3 vacuum pump, P4 tower kettle pump, a sight glass, b regulating valve, c pressure gauge, d variable frequency motor.
Description of the embodiments
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Embodiment 1, refer to fig. 1, the device for producing electronic grade cyclic carbonate provided by the utility model comprises a falling film evaporator (E1), a gas-liquid separator (V1), a refining tower (T1), a heat pump unit (P1), a falling film reboiler (E2), a post cooler (E3), a reflux tank (V2), a reflux pump (P2), a vacuum pump (P3) and a tower kettle pump (P4), wherein the top inlet of the falling film evaporator (E1) is connected with a feed pipeline, the bottom outlet of the falling film evaporator (E1) and the gas-liquid separator (V1) are connected with a catalyst recovery tank, the bottom side outlet of the falling film evaporator (E1) is connected with the side inlet of the gas-liquid separator (V1), the top outlet of the gas-liquid separator (V1) is connected with the inlet of the refining tower (T1), the top outlet of the refining tower (T1) is connected with the inlet of the heat pump unit (P1), the outlet of the heat pump unit (P1) is connected with the side inlet of the falling film (E2), the side reboiler side of the falling film evaporator (E2) is connected with the back cooler (E3) and the hot side of the reflux pump unit (P2), the back outlet of the falling film evaporator (E2) is connected with the hot side of the reflux pump (P2) is connected with the hot side of the cold pump (P2), the cold side of the reflux pump (C2) is connected with the hot pump (C2) and the hot pump (C2) is connected with the hot side of the cold pump (P2), the outlet of the reflux pump (P2) is connected with the reflux inlet of the refining tower (T1), the outlet of the reflux pump (P2) is connected with the outlet of the tower kettle pump (P4), the outlet of the tower kettle of the refining tower (T1) is connected with the inlet of the tower kettle pump (P4), the outlet of the tower kettle pump (P4) is connected with the cold side inlet of the top of the falling film reboiler (E2), the outlet of the falling film reboiler (E2) after the bottom cold side heat exchange is connected with the tower kettle of the refining tower (T1), the outlet of the tower kettle pump (P4) is connected with the industrial grade product extraction pipeline, and the side outlet of the refining tower (T1) is connected with the electronic grade product extraction pipeline.
Wherein, the gas phase outlet at the top of the gas-liquid separator (V1) is directly connected with the feed inlet of the refining tower (T1) through a pipeline, and the refining tower (T1) adopts a gas phase feed mode.
The heat pump unit (P1) adopts a variable frequency motor (d), a pressure gauge (c) is arranged on an outlet pipeline of the heat pump unit, and instrument control interlocking is arranged between the pressure gauge (c) and the variable frequency motor (d).
The hot side of the falling film reboiler (E2) is provided with a noncondensable gas exhaust regulating valve (b) and is connected to a reflux tank (V2) through a pipeline.
The connecting pipeline from the bottom outlet of the falling film evaporator (E1) and the bottom outlet of the gas-liquid separator (V1) to the catalyst recovery tank is provided with the sight glass (a), the installation elevation of the falling film evaporator (E1) and the installation elevation of the gas-liquid separator (V1) are the same, and the installation elevation of the falling film evaporator (E1) and the installation elevation of the gas-liquid separator (V1) are larger than the top elevation of the catalyst recovery tank by 15m.
When the catalyst is used, the synthesized catalyst and the propylene carbonate/ethylene carbonate mixture enter a falling film evaporator (E1) for vaporization separation, and the vaporized propylene carbonate/ethylene carbonate is directly enters a refining tower (T1) for refining in a gas phase form after liquid drops are removed by a gas-liquid separator (V1), so that equipment such as a condenser and the circulating water quantity are reduced. The installation elevation of the falling film evaporator (E1) and the installation elevation of the gas-liquid separator (V1) are the same, the bottoms of the falling film evaporator and the gas-liquid separator are higher than the top 15m of the catalyst recovery tank, and the catalyst recovery liquid can flow into the catalyst recovery tank by means of gravity and atmospheric legs and can be observed through a sight glass to see whether the material flow state and the production are normal or not. The refining tower adopts a heat pump unit (P1), and the heat at the top of the tower is recovered to heat a reboiler at the bottom of the tower. The tower top gas phase material heats the falling film reboiler of the refining tower through the boosting and heating of the heat pump unit, and according to the heat exchange temperature requirement, the outlet pressure (c) of the heat pump unit is controlled by the variable frequency motor (d), the temperature and the pressure of the compressed material are regulated, and meanwhile, the running power of the motor is reduced. And the noncondensable gas is discharged through adjusting a noncondensable gas exhaust regulating valve (b) on the hot side of the falling film reboiler, so that the heat exchange is ensured to be normal. The materials are cooled by a aftercooler (E3) and condensed into liquid phase, the liquid phase enters a reflux tank (V2), and part of the reflux tank materials are conveyed to a refining tower through a reflux pump (P2) to be used as reflux, and the other part of the reflux tank materials and tower kettle materials are mixed and then are extracted as industrial grade products. The non-condensable gas at the top of the tower is pumped out to the tail gas treatment system by a vacuum pump (P3) to provide a vacuum operation environment for the system. And (3) feeding a part of materials at the outlet of the tower kettle pump (P4) into a falling film reboiler (E2) for heat exchange, and then vaporizing and returning to the refining tower, wherein a part of materials are extracted as industrial-grade products. And the electronic grade propylene carbonate/ethylene carbonate product is extracted from the side line of the refining tower.
In the technical scheme of the embodiment, when an electronic-grade propylene carbonate production device with annual production of 120000 tons is tested, the original production device is modified according to the content of the utility model. The results of the plant run test after the modification are shown in the following table: the quality and the yield of the produced electronic grade propylene carbonate product meet the specified requirements, the consumption of steam and circulating water is reduced, the consumption of standard oil per ton of the product is reduced by 67%, the production energy consumption and the production cost are obviously reduced, and the expected effect is achieved.
The above embodiments are merely one implementation form of the apparatus for producing electronic grade cyclic carbonates according to the present utility model, and it is within the scope of the present utility model to add or subtract components thereto according to other variants of the solution provided by the present utility model, or to use the present utility model in other technical fields close to the present utility model.
Claims (5)
1. An apparatus for the production of electronic grade cyclic carbonates, characterized in that: the device comprises a falling film evaporator (E1), a gas-liquid separator (V1), a refining tower (T1), a heat pump unit (P1), a falling film reboiler (E2), a aftercooler (E3), a reflux tank (V2), a reflux pump (P2), a vacuum pump (P3) and a tower kettle pump (P4), wherein the top inlet of the falling film evaporator (E1) is connected with a feed pipeline, the bottom outlet of the falling film evaporator (E1) and the gas-liquid separator (V1) are connected with a catalyst recovery tank, the bottom side outlet of the falling film evaporator (E1) is connected with the side inlet of the gas-liquid separator (V1), the top outlet of the gas-liquid separator (V1) is connected with the inlet of the refining tower (T1), the top outlet of the refining tower (T1) is connected with the inlet of the heat pump unit (P1), the outlet of the heat pump unit (P1) is connected with the hot side inlet of the falling film reboiler (E2), the hot side cold side outlet of the falling film evaporator (E2) is connected with the side inlet of the aftercooler (E3), the side outlet of the reflux tank (E3) is connected with the hot side inlet of the reflux pump (P2), the reflux tank (P2) is connected with the reflux pump (P2), the reflux outlet of the reflux system (V1) is connected with the reflux pump (P2) is connected with the hot side outlet of the reflux pump (P2), the outlet of the tower kettle of the refining tower (T1) is connected with the inlet of a tower kettle pump (P4), the outlet of the tower kettle pump (P4) is connected with the cold side inlet at the top of a falling film reboiler (E2), the outlet of the falling film reboiler (E2) after the cold side heat exchange is connected with the tower kettle of the refining tower (T1), the outlet of the tower kettle pump (P4) is connected with an industrial grade product extraction pipeline, and the side outlet of the refining tower (T1) is connected with an electronic grade product extraction pipeline.
2. An apparatus for the production of electronic grade cyclic carbonates according to claim 1, characterized in that: the gas phase outlet at the top of the gas-liquid separator (V1) is directly connected with the feed inlet of the refining tower (T1) through a pipeline, and the refining tower (T1) adopts a gas phase feed mode.
3. An apparatus for the production of electronic grade cyclic carbonates according to claim 1, characterized in that: the heat pump unit (P1) adopts a variable frequency motor (d), a pressure gauge (c) is arranged on an outlet pipeline of the heat pump unit, and instrument control interlocking is arranged on the pressure gauge (c) and the variable frequency motor (d).
4. An apparatus for the production of electronic grade cyclic carbonates according to claim 1, characterized in that: the hot side of the falling film reboiler (E2) is provided with a noncondensable gas exhaust regulating valve (b) and is connected to a reflux tank (V2) through a pipeline.
5. An apparatus for the production of electronic grade cyclic carbonates according to claim 1, characterized in that: the installation elevation of the falling film evaporator (E1) and the gas-liquid separator (V1) is larger than the elevation of the top of the catalyst recovery tank by 12-25 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321080143.9U CN220091345U (en) | 2023-05-08 | 2023-05-08 | Device for producing electronic-grade cyclic carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321080143.9U CN220091345U (en) | 2023-05-08 | 2023-05-08 | Device for producing electronic-grade cyclic carbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220091345U true CN220091345U (en) | 2023-11-28 |
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ID=88842653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321080143.9U Active CN220091345U (en) | 2023-05-08 | 2023-05-08 | Device for producing electronic-grade cyclic carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220091345U (en) |
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2023
- 2023-05-08 CN CN202321080143.9U patent/CN220091345U/en active Active
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