A dechlorination reactor for ethylene carbonate production

Abstract

The utility model discloses a kind of dechlorination reactors for ethylene carbonate production, it is related to the application field of dechlorination packing tower, including tower body, the inside of tower body is provided with solution chamber, the upper portion of solution chamber is provided with exchange chamber, and the side of tower body is provided with air inlet pipeline, air inlet pipeline is communicated with solution chamber, the top of tower body is provided with exhaust pipeline, exhaust pipeline and exchange chamber are communicated, the inside of exchange chamber is provided with spray assembly and packing rack, and packing rack is used to carry packing layer, and the inside of exchange chamber is provided with arc guiding surface, and the side of arc guiding surface is provided with multiple groups of arc guiding grooves, and the both sides of multiple groups of arc guiding grooves are all provided as inclined surface.The utility model can make the solution attached to the inside wall of each exchange chamber gather and flow to the middle of tower body by setting arc guiding surface in the inside of the exchange chamber of tower body, so that the solution attached to the inside wall of tower body can also be guided to react with gas fully to improve the utilization efficiency of solution.

Description

Technical Field

[0001] This utility model relates to the application field of dechlorination packed towers, specifically a dechlorination reactor for the production of ethylene carbonate. Background Technology

[0002] Ethylene carbonate is a low-toxicity, high-performance cyclic organic carbonate. It is also a widely used organic solvent and organic synthesis intermediate. It is a key component of lithium battery electrolytes, which can improve battery energy density and cycle performance. It can also be used as an organic synthesis intermediate in the production of chemical products such as dimethyl carbonate. In addition, it can be used in many other fields such as lubricant additives, environmental cleaning agents, and pharmaceutical synthesis raw materials.

[0003] While ethylene carbonate itself generally does not require dechlorination during production, the synthesis of downstream products such as chloroethylene carbonate and vinylene carbonate from it involves chlorination reactions, resulting in subsequent steps such as tail gas dechlorination, intermediate product dechlorination, and purification dechlorination. The dechlorination reactors used in the production of ethylene carbonate are typically packed dechlorination towers. Tower body: cylindrical structure, with gas inlet and liquid outlet (bottom) and liquid inlet and gas outlet (top) respectively.

[0004] Packing layer: core component, filled with regular corrugated packing, the material of which is the same as that of the tower body.

[0005] Liquid distributor: Located at the top of the tower, it sprays the dechlorination alkali solution evenly onto the packing surface to ensure full gas-liquid contact.

[0006] In dechlorination packed towers, the gas-liquid exchange space inside the tower is usually set up in multiple layers. Each gas-liquid exchange space is equipped with a liquid distributor and a packing layer. The packing layer is used to improve the efficiency of gas-liquid exchange. The packing itself is a replaceable material, usually a large amount of screen racks filled inside the tower. When the multiple gas-liquid exchange spaces inside the tower are working, the solution sprayed from the uppermost liquid distributor sprays onto the uppermost packing layer. The solution not only reacts with the gas in the packing layer, but some of the solution also flows down the inner wall of the tower. In addition, some of the solution in each exchange space will adhere to the inner wall of the tower, which reduces the efficiency of the solution-gas reaction. However, this part of the solution adhering to the inside of the tower will also react with the gas. However, unlike the solution filling the packing layer, the solution on the inner wall of the tower will produce a sticky substance that adheres to the inner wall of the tower and is difficult to remove later. The sticky substance produced by the reaction in the packing layer can be directly cleaned by replacing the packing layer later. Summary of the Invention

[0007] Therefore, the purpose of this invention is to provide a dechlorination reactor for the production of ethylene carbonate, in order to solve the technical problems mentioned in the background above.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a dechlorination reactor for the production of ethylene carbonate, comprising a tower body, a solution chamber inside the tower body, an exchange chamber above the solution chamber, an air inlet pipe on the side of the tower body communicating with the solution chamber, an exhaust pipe on the top of the tower body communicating with the exchange chamber, a spray assembly and a packing rack inside the exchange chamber, the packing rack supporting the packing layer, and an arc-shaped guide surface inside the exchange chamber, with multiple sets of arc-shaped guide grooves on the side of the arc-shaped guide surface, and both sides of the multiple sets of arc-shaped guide grooves being inclined surfaces.

[0009] By adopting the above technical solution, and by setting an arc-shaped guide surface on the inner side of the tower exchange chamber, the solution adhering to the inner wall of each exchange chamber can be allowed to gather and flow towards the middle of the tower. This allows the solution adhering to the inner wall of the tower to fully contact and react with the gas. When the solution gathers at the arc-shaped guide surface, it flows into the collection tank through the arc-shaped guide groove and inclined surface. The solution in the collection tank then flows evenly to the middle position of the next exchange chamber through the drain hole, where it can better contact and react with the gas, thus improving the utilization efficiency of the solution.

[0010] The present invention is further configured such that the solution chamber is used to collect waste gas solution, and the solution chamber is connected to a waste gas solution circulation device.

[0011] Preferably, by setting up a circulation device, the waste gas solution collected in the solution chamber can be discharged, and the waste solution can be re-prepared for recycling. The circulation device can also be connected to a solution conveying device.

[0012] The present invention is further configured such that the exchange chamber is provided in multiple sets, and each set of exchange chambers has an observation cabin on its side, and the observation cabin is provided with a transparent cover.

[0013] Preferably, by setting up multiple sets of exchange chambers, the chlorine-containing waste gas undergoes multiple exchange reactions within the tower body, thereby improving the absorption efficiency of the solution for chlorine.

[0014] The present invention is further configured such that the exhaust pipe is connected to a fan, and the fan is used to make the chlorine-containing waste gas enter from the intake pipe, and then discharge it from the exhaust pipe after reaction treatment.

[0015] Preferably, a fan is used to drive the flow of chlorine-containing waste gas and compliant gas.

[0016] The present invention is further configured such that multiple sets of spray assemblies installed inside the exchange chamber are connected to a liquid inlet pipe, and the liquid inlet pipe is connected to a solution conveying device.

[0017] Preferably, the solution is delivered to the inlet pipe by a solution delivery device and then distributed to each spray assembly. The spray assembly includes multiple atomizing nozzles for atomizing and spraying the solution into the tower body.

[0018] The present invention is further configured such that multiple sets of the spraying components are distributed above the corresponding filler layer.

[0019] Preferably, by placing the spray assembly above the packing layer, the solution sprayed by the spray assembly can enter the packing layer and be further refined to react with the chlorine-containing waste gas.

[0020] The present invention is further provided with a collection groove on the inner edge of the arc-shaped guide surface, the collection groove being used to collect the solution adhering to the inner wall of the tower.

[0021] Preferably, a collection tank is provided to collect the solution adhering to the inside of the tower, so that the solution can be more evenly distributed to every part of the collection tank.

[0022] The present invention is further configured such that multiple sets of drain holes are evenly provided at the bottom of the collection tank.

[0023] Preferably, by providing multiple sets of drain holes, the solution in the collection tank can be more evenly distributed into the exchange chamber below. The present invention is further configured such that multiple sets of drainage holes correspond to multiple sets of arc-shaped guide grooves.

[0024] Preferably, by setting the position of the drain hole to correspond with the arc-shaped guide groove, when the amount of attached and drained solution is small, it can be directly discharged through the drain hole.

[0025] In summary, the present invention has the following main advantages: This invention, by setting an arc-shaped guide surface on the inner side of the exchange chamber of the tower, allows the solution adhering to the inner wall of each exchange chamber to gather and flow towards the middle of the tower. This allows the solution adhering to the inner wall of the tower to fully contact and react with the gas. When the solution gathers at the arc-shaped guide surface, it flows into the collection tank through the arc-shaped guide groove and inclined surface. The solution in the collection tank then flows evenly to the middle position of the next exchange chamber through the drain hole, which can better contact and react with the gas, thus improving the utilization efficiency of the solution. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tower body of this utility model; Figure 3 This is a schematic diagram showing the distribution of multiple sets of exchange chambers and spray components according to this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram showing the distribution of the collection tank and discharge hole of this utility model.

[0027] Explanation of reference numerals in the attached figures: 1. Tower body; 2. Solution chamber; 3. Exchange chamber; 4. Air inlet pipe; 5. Exhaust pipe; 6. Observation chamber; 7. Spray assembly; 8. Liquid inlet pipe; 9. Packing material storage rack; 10. Arc-shaped guide surface; 11. Arc-shaped guide groove; 12. Inclined surface; 13. Collection tank; 14. Drain hole. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The embodiments of this utility model will be described below based on its overall structure.

[0030] Please see Figure 1 - Figure 5 A dechlorination reactor for the production of ethylene carbonate includes a tower body 1, a solution chamber 2 inside the tower body 1, an exchange chamber 3 above the solution chamber 2, and an air inlet pipe 4 connected to the solution chamber 2 on the side of the tower body 1. An exhaust pipe 5 connected to the exchange chamber 3 is located at the top of the tower body 1. The exchange chamber 3 contains a spray assembly 7 and a packing rack 9 for supporting the packing layer. An arc-shaped guide surface 10 is provided inside the exchange chamber 3, and multiple sets of arc-shaped guide grooves 11 are formed on the side of the arc-shaped guide surface 10. Both sides of the channel 11 are set as inclined surfaces 12. By setting an arc-shaped guide surface 10 on the inner side of the exchange chamber 3 of the tower body 1, the solution attached to the inner wall of each exchange chamber 3 can be allowed to gather and flow towards the middle of the tower body 1. This allows the solution attached to the inner wall of the tower body 1 to fully contact and react with the gas through guidance. When the solution gathers at the arc-shaped guide surface 10, it flows into the collection tank 13 through the arc-shaped guide channel 11 and the inclined surface 12. The solution in the collection tank 13 then flows evenly to the middle position of the next layer of exchange chamber 3 through the drain hole 14, which can better contact and react with the gas, thereby improving the utilization efficiency of the solution.

[0031] Please refer to the above embodiments for further details. Figure 2 Solution chamber 2 is used to collect waste gas solution, and solution chamber 2 is connected to a waste gas solution circulation device. By setting up the circulation device, the waste gas solution collected in solution chamber 2 can be discharged, and then the waste gas solution can be re-prepared for recycling. The circulation device can also be connected to a solution conveying device.

[0032] Please refer to the above embodiments for further details. Figure 2 The exchange chamber 3 is provided in multiple sets, and each set of exchange chamber 3 has an observation chamber 6 on its side. The observation chamber 6 is equipped with a transparent cover. By setting up multiple sets of exchange chambers 3, the chlorine-containing waste gas can undergo multiple exchange reactions in the tower body 1, thereby improving the absorption efficiency of the solution for chlorine.

[0033] Please refer to the above embodiments for further details. Figure 2 The exhaust pipe 5 is connected to a fan. The fan is used to make the chlorine-containing waste gas enter from the inlet pipe 4, and then after reaction treatment, it is discharged from the exhaust pipe 5. The fan is used to drive the flow of chlorine-containing waste gas and qualified gas.

[0034] Please refer to the above embodiments for further details. Figure 2 The spray assembly 7 inside the multiple sets of exchange chambers 3 is connected to the liquid inlet pipe 8. The liquid inlet pipe 8 is connected to the solution delivery device. The solution is delivered to the liquid inlet pipe 8 by the solution delivery device and then distributed to each set of spray assembly 7. The spray assembly 7 includes multiple atomizing nozzles for atomizing and spraying the solution into the tower body 1.

[0035] Please refer to the above embodiments for further details. Figure 2 Multiple spray components 7 are distributed above the corresponding packing layer. By setting the spray components 7 above the packing layer, the solution sprayed by the spray components 7 can enter the packing layer and be further refined to react with the chlorine-containing waste gas.

[0036] Please refer to the above embodiments for further details. Figure 4 and Figure 5 The inner edge of the arc-shaped guide surface 10 is provided with a collection trough 13. The collection trough 13 is used to collect the solution adhering to the inner wall of the tower body 1. By setting the collection trough 13 to collect the solution adhering to the inside of the tower body 1, the solution can be more evenly distributed to each part of the collection trough 13.

[0037] Please refer to the above embodiments for further details. Figure 4 and Figure 5 The bottom of the collection tank 13 is evenly provided with multiple sets of drain holes 14. By setting multiple sets of drain holes 14, the solution in the collection tank 13 can be more evenly distributed to the exchange chamber 3 below.

[0038] Please refer to the above embodiments for further details. Figure 4 and Figure 5 Multiple sets of drain holes 14 and multiple sets of arc-shaped guide grooves 11 correspond to each other. By setting the position of the drain holes 14 to correspond to the arc-shaped guide grooves 11, when the amount of attached and drained solution is small, it can be directly discharged through the drain holes 14.

[0039] In practical operation, the chlorine-containing waste gas enters the solution chamber 2 through the inlet pipe 4, while the exhaust pipe 5 is connected to a fan. Under the action of the fan, the chlorine-containing waste gas rises and passes through the packing layer above the packing shelf 9. Then, the solution conveying device transports the solution from the inlet pipe 8 to the spray assembly 7. The spray assembly 7 sprays the solution evenly into the packing layer. The packing layer allows the solution and waste gas to fully contact and react, producing waste solution that drips and collects in the solution chamber 2. It is then extracted by the circulation device. New reactants can be added, filtered, screened, and reused. The newly prepared solution can be transported to the solution conveying device. Finally, the chlorine-containing waste gas, after multiple reactions and absorption, is discharged from the exhaust pipe 5.

[0040] During the gas-solution exchange reaction, when the spray assembly 7 sprays the solution from top to bottom, most of the solution enters the packing layer, and a small amount adheres to the inner wall of the tower body 1. The mist-like solution gradually accumulates on the inner wall of the tower body 1 and slides along the inner wall of the tower body 1. Then, guided by the arc-shaped guide surface 10, and then diverted by the arc-shaped guide groove 11 and the inclined surface 12, the solution is divided into multiple groups and flows into the collection tank 13. The inclination angle of the inclined surface 12 is greater than that of the arc-shaped guide surface 10. That is to say, the arc-shaped guide surface 10 is used to guide the solution towards the center of the tower body 1. However, the two adjacent inclined surfaces 12 not only reduce the solution adhesion points, making it easier for the solution to flow to the arc-shaped guide groove 11, but also the inclination angle of the inclined surface 12 is greater than that of the arc-shaped guide surface 10, which makes the solution gather in the arc-shaped guide groove 11 more quickly.

[0041] The solution accumulated in the collection tank 13 flows through the drain hole 14 to the exchange chamber 3 on the lower layer. Compared with the traditional tower body, the inner wall of the tower body is vertical, which causes the solution attached to the inner wall of the tower body to flow directly into the solution chamber 2 from top to bottom, resulting in some solution not being utilized.

Claims

1. A dechlorination reactor for the production of ethylene carbonate, comprising a tower body (1), characterized in that: The tower body (1) is provided with a solution chamber (2) inside, and an exchange chamber (3) is provided above the solution chamber (2). An air inlet pipe (4) is provided on the side of the tower body (1), and the air inlet pipe (4) is connected to the solution chamber (2). An exhaust pipe (5) is provided at the top of the tower body (1), and the exhaust pipe (5) is connected to the exchange chamber (3). The exchange chamber (3) is provided with a spray assembly (7) and a packing rack (9). The packing rack (9) is used to support the packing layer. The exchange chamber (3) is provided with an arc-shaped guide surface (10), and multiple sets of arc-shaped guide grooves (11) are opened on the side of the arc-shaped guide surface (10). Both sides of the multiple sets of arc-shaped guide grooves (11) are set as inclined surfaces (12).

2. The dechlorination reactor for ethylene carbonate production according to claim 1, characterized in that: The solution chamber (2) is used to collect waste gas solution, and the solution chamber (2) is connected to a waste gas solution circulation device.

3. A dechlorination reactor for the production of ethylene carbonate according to claim 2, characterized in that: The exchange chamber (3) is provided in multiple sets, and each set of exchange chambers (3) has an observation cabin (6) on its side, and the observation cabin (6) is provided with a transparent cover.

4. A dechlorination reactor for the production of ethylene carbonate according to claim 3, characterized in that: The exhaust pipe (5) is connected to a fan. The fan is used to make the chlorine-containing waste gas enter from the inlet pipe (4) and then be discharged from the exhaust pipe (5) after reaction treatment.

5. A dechlorination reactor for the production of ethylene carbonate according to claim 4, characterized in that: The multiple sets of exchange chambers (3) are equipped with spray components (7) that are connected to a liquid inlet pipe (8), and the liquid inlet pipe (8) is connected to a solution conveying device.

6. A dechlorination reactor for the production of ethylene carbonate according to claim 5, characterized in that: Multiple sets of the spray components (7) are distributed above the corresponding filler layer.

7. A dechlorination reactor for the production of ethylene carbonate according to claim 6, characterized in that: The inner edge of the arc-shaped guide surface (10) is provided with a collection groove (13), which is used to collect the solution adhering to the inner wall of the tower body (1).

8. A dechlorination reactor for the production of ethylene carbonate according to claim 7, characterized in that: The bottom of the collection tank (13) is evenly provided with multiple sets of discharge holes (14).

9. A dechlorination reactor for the production of ethylene carbonate according to claim 8, characterized in that: Multiple sets of drainage holes (14) and multiple sets of arc-shaped guide grooves (11) correspond to each other.

Images