Rectifying tower for producing fluorine-containing chemicals
By introducing efficiency components and return pump systems into the distillation tower, the gas-liquid contact and mass transfer process is optimized, and the problem of poor heat transfer effect of the existing distillation tower is solved, achieving a more efficient separation effect.
Patent Information
- Application Number
- CN202422373363.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-28
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-28
AI Technical Summary
The existing distillation towers are only transported through a liquid pump when feeding, and the contact area between the gas and liquid phases is not large, resulting in average heat transfer effect and poor separation effect.
The integrated efficiency components are adopted, including the suction chamber, suction pipe, throat section and diffusion section, and the contact area of the gas-liquid phases is increased by the negative pressure gas flow, and combined with the filler layer and the return pump system, the gas-liquid contact and mass transfer process is optimized.
The contact area and heat transfer effect of the gas-liquid phases are improved, the separation efficiency is significantly enhanced, and the separation effect of the distillation tower is improved.
Smart Images
Figure CN223287637U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of distillation towers, in particular to a distillation tower for producing fluorine-containing chemicals. Background Art
[0002] The distillation tower uses the property that each component in the mixture has different volatility (that is, the vapor pressure of each component is different at the same temperature) to achieve the purpose of separation by transferring 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 through countercurrent contact between the gas and liquid phases.
[0003] Some existing distillation towers use fillers instead of tower plates, such as new high-performance metal wire mesh fillers and composite material fillers. These have the characteristics of low pressure drop, high throughput, and excellent mass transfer performance, which can improve separation efficiency. However, the existing distillation towers only use liquid pumps to transport the feed when feeding, and the contact area between the gas and liquid phases is not large, resulting in general heat transfer effect and poor separation effect. Therefore, the utility model proposes a distillation tower for the production of fluorine-containing chemicals to solve the above problems. Utility Model Content
[0004] In response to the above problems, the present invention proposes a distillation tower for the production of fluorine-containing chemicals to solve the problem in the prior art that the distillation tower only uses a liquid pump to transport the feed, and the contact area between the gas and liquid phases is not large, resulting in general heat transfer effect and poor separation effect.
[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a distillation tower for the production of fluorine-containing chemicals, comprising a tower body, a reboiler, a condenser and a distillation tank, a reboiler is provided on one side of the bottom of the tower body, a condenser is provided on one side of the top of the tower body, a distillation tank is provided at the bottom of one end of the condenser, and a plurality of feed pipes are connected to one side of the tower body, and an enhancement component is provided on the feed pipe.
[0006] Further improvements are as follows: the synergistic component includes an intake chamber, an intake pipe, a throat section and a diffusion section; an intake chamber is provided at one end of the feed pipe; the top of the intake chamber is connected to the intake pipe; one side of the intake chamber is connected to the delivery pipe; a throat section is provided inside the feed pipe; and a diffusion section is provided at the end of the feed pipe away from the delivery pipe.
[0007] A further improvement is that one end of the feed pipe is connected to a nozzle, the nozzle extends into the interior of the suction chamber, the positions of the nozzle and the throat section are parallel to each other, one end of the throat section is connected to one end of the diffusion section, and the diffusion section is set to a trumpet-shaped structure.
[0008] A further improvement is that the interior of the tower body is provided with a plurality of separation layers, adjacent separation layers are staggered, a packing layer is provided on the top of the separation layer, and a plurality of pressure relief valves are connected to the side of the tower body away from the feed pipe.
[0009] Further improvements are: a top pipe is provided at the top of the tower body, the top of the top pipe is connected to a feed pipe, one end of the feed pipe is connected to the input end of the condenser, the output end of the condenser is connected to the top of the distillation tank through a connecting pipe, one end of the condenser is connected to a cold water inlet and a hot water inlet, a reflux pump is fixedly installed at one end of the bottom of the condenser, the output end of the reflux pump is connected to the top of the tower body through a reflux pipe, and the input end of the reflux pump is connected to the top of the connecting pipe through a reflux pipe.
[0010] A further improvement is that: a bottom pipe is provided at the bottom end of the tower body, a feeding pipe is connected to one side of the bottom end of the tower body, and a conveying mechanism is provided between the reboiler and the tower body.
[0011] Further improvements are: the conveying mechanism includes a No. 1 pipe, a liquid pump and a No. 2 pipe, the top of the reboiler is connected to the No. 1 pipe, one end of the No. 1 pipe is connected to one end of the feed pipe, a liquid pump is provided below the reboiler, the input end of the liquid pump is connected to the bottom end of the bottom pipe through the No. 2 pipe, the output end of the liquid pump is connected to the bottom end of the reboiler through the No. 2 pipe, and the outside of the No. 2 pipe is connected to a sewage pipe.
[0012] The beneficial effects of the utility model are as follows: the suction pipe is connected to the external air pump to discharge the air inside the suction chamber, making it present a negative pressure state, and the fluorine-containing chemical liquid can be sucked into the interior of the suction chamber through the nozzle, and then the air flow is changed from coarse to fine through the throat section to accelerate the gas flow rate, so that the gas forms a "vacuum" area on the rear side of the outlet, and when this vacuum area is close to the workpiece, it will have a certain adsorption effect on the workpiece, increase the contact area between the gas and liquid phases, thereby enhancing the mass transfer and heat transfer effect, and improving the separation efficiency. Finally, it is sprayed to the interior of the tower body through the diffusion section to solve the problem in the prior art that the distillation tower is only transported by a liquid pump when feeding, and the contact area between the gas and liquid phases is not large, resulting in general heat transfer effect and poor separation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is the main view of the utility model;
[0014] Figure 2 This is a schematic diagram of the internal structure of the tower body of the present utility model;
[0015] Figure 3 This is a schematic diagram of the internal structure of the feed pipe of the present invention.
[0016] Among them: 1. Tower body; 2. Reboiler; 3. Condenser; 4. Distillation tank; 5. Feed pipe; 6. Inhalation chamber; 7. Delivery pipe; 8. Nozzle; 9. Intake pipe; 10. Throat section; 11. Diffusion section; 12. Separation layer; 13. Packing layer; 14. Pressure relief valve; 15. Top pipe; 16. Feed pipe; 17. Cold water inlet; 18. Hot water inlet; 19. Connecting pipe; 20. Bottom pipe; 21. Feed pipe; 22. No. 1 pipe; 23. Liquid pump; 24. No. 2 pipe; 25. Drain pipe; 26. Reflux pump; 27. Reflux pipe. DETAILED DESCRIPTION
[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.
[0018] according to Figure 1 、 2 As shown in Figure 3, this embodiment proposes a distillation tower for the production of fluorine-containing chemicals, including a tower body 1, a reboiler 2, a condenser 3 and a distillation tank 4. The reboiler 2 is provided on one side of the bottom of the tower body 1, the condenser 3 is provided on one side of the top of the tower body 1, and the distillation tank 4 is provided at the bottom of one end of the condenser 3. A plurality of feed pipes 5 are connected to one side of the tower body 1, and the feed pipes 5 are provided with a synergistic component. The fluorine-containing chemical liquid at the bottom of the tower body 1 is heated by steam through the reboiler 2, and the steam formed by partial evaporation rises in the tower. The rising steam is condensed into liquid in the condenser 3, and part of the liquid is returned to the tower body 1 as reflux liquid to maintain the vapor-liquid equilibrium and separation effect in the tower body 1. After multiple gas-liquid contacts and mass transfer, the light component is enriched at the top of the tower and collected through the distillation tank 4 in the form of distillate.
[0019] The enhancement component includes an intake chamber 6, an intake pipe 9, a throat section 10 and a diffusion section 11. An intake chamber 6 is provided at one end of the feed pipe 5. The top of the intake chamber 6 is connected to the intake pipe 9. One side of the intake chamber 6 is connected to the delivery pipe 7. A throat section 10 is provided inside the feed pipe 5. A diffusion section 11 is provided at the end of the feed pipe 5 away from the delivery pipe 7.
[0020] One end of the feed pipe 7 is connected to a nozzle 8, which extends into the interior of the suction chamber 6. The nozzle 8 and the throat section 10 are parallel to each other. One end of the throat section 10 is connected to one end of the diffuser section 11, and the diffuser section 11 is set to a trumpet-shaped structure.
[0021] The suction pipe 9 is connected to the external air pump to discharge the air inside the suction chamber 6 to make it present a negative pressure state. The fluorine-containing chemical liquid can be sucked into the interior of the suction chamber 6 through the nozzle 8, and then the air flow is changed from coarse to fine through the throat section 10 to accelerate the gas flow rate, so that the gas forms a "vacuum" area on the rear side of the outlet. When this vacuum area is close to the workpiece, it will have a certain adsorption effect on the workpiece, increase the contact area between the gas and liquid phases, thereby enhancing the mass transfer and heat transfer effect, and improving the separation efficiency. Finally, it is sprayed into the interior of the tower body 1 through the diffusion section 11.
[0022] A bottom pipe 20 is provided at the bottom end of the tower body 1 , and a feed pipe 21 is connected to one side of the bottom end of the tower body 1 . A conveying mechanism is provided between the reboiler 2 and the tower body 1 .
[0023] The conveying mechanism includes a No. 1 pipe 22, a liquid pump 23 and a No. 2 pipe 24. The top of the reboiler 2 is connected to the No. 1 pipe 22, one end of the No. 1 pipe 22 is connected to one end of the feed pipe 21, and a liquid pump 23 is provided below the reboiler 2. The input end of the liquid pump 23 is connected to the bottom end of the bottom pipe 20 through the No. 2 pipe 24, and the output end of the liquid pump 23 is connected to the bottom end of the reboiler 2 through the No. 2 pipe 24, and the outside of the No. 2 pipe 24 is connected to a sewage pipe 25.
[0024] The liquid flowing out from the bottom of the tower body 1 flows into the interior of the reboiler 2 through the liquid pump 23 and the No. 2 pipe 24 and is heated by steam. The light components in the liquid at the bottom of the tower body 1 begin to vaporize to form steam. These steam and the remaining liquid, i.e., the heavy components, form a gas-liquid mixture. The generated steam or gas-liquid mixture returns to the distillation tower through the pipeline and continues to participate in the distillation process. The rising steam promotes the contact and mass transfer of the gas-liquid two phases in the tower body 1, which helps to separate different components. In order to maintain the heating effect at the bottom of the tower body 1, the reboiler 2 usually needs to continuously receive an external heat source and transfer heat to the liquid at the bottom of the tower body 1.
[0025] The interior of the tower body 1 is provided with a plurality of separation layers 12, which are staggered between adjacent separation layers 12, and a packing layer 13 is provided on the top of the separation layer 12. The side of the tower body 1 away from the feed pipe 5 is connected to a plurality of pressure relief valves 14. After the fluorine-containing chemical liquid enters the interior of the tower body 1, it falls onto the separation layer 12, and then contacts the packing layer 13 on the top of the separation layer 12. During the rising process, the steam is in close contact with the liquid on the separation layer 12 or the packing layer 13 to exchange heat and mass. The light component is gradually enriched in the gas phase, while the heavy component is gradually enriched in the liquid phase. The packing layer 13 includes metal mesh packing, composite material packing, etc., which have the characteristics of low pressure drop, high flux, excellent mass transfer performance, etc., and can significantly improve the separation efficiency.
[0026] A top pipe 15 is provided at the top of the tower body 1, and a feed pipe 16 is connected to the top of the top pipe 15. One end of the feed pipe 16 is connected to the input end of the condenser 3, and the output end of the condenser 3 is connected to the top of the distillation tank 4 through a connecting pipe 19. One end of the condenser 3 is connected to a cold water inlet 17 and a hot water inlet 18. During the rising process, the steam is transported to the interior of the condenser 3 through the feed pipe 16. The interior of the condenser 3 usually contains a long tube, which is sometimes coiled into a solenoid shape. The gas flows through this tube. In order to conduct heat more effectively, the tube is usually made of a material with strong thermal conductivity, such as copper. These materials can quickly transfer the heat in the gas to the outer wall of the tube to liquefy the steam. The cold water inlet 17 and the hot water inlet 18 lead in cold water, or lead out hot water that has absorbed the heat energy.
[0027] A reflux pump 26 is fixedly installed at one end of the bottom of the condenser 3. The output end of the reflux pump 26 is connected to the top of the tower body 1 through a reflux pipe 27, and the input end of the reflux pump 26 is connected to the bottom of the top of the connecting pipe 19 through the reflux pipe 27. The condensed liquid is returned to the top of the tower body 1 through the reflux pump 26 and the reflux pipe 27. The reflux liquid provides cold reflux on the partition layer 12, removes excess heat in the tower body 1, helps to maintain the heat balance in the tower body 1, and prevents the temperature in the tower from being too high or too low, which affects the separation effect. The reflux liquid repeatedly contacts the rising steam in the tower body 1, so that the light components are continuously enriched and eventually distilled from the top of the tower body 1, while the heavy components gradually sink and remain at the bottom of the tower. This repeated condensation and vaporization further increases the accuracy of product separation. The liquid reflux at the top of the tower body 1 and the rising vapor flow of the reboiler 2 are necessary conditions to ensure the continuous and stable distillation process. The presence of the reflux liquid helps to stabilize the gas-liquid balance in the tower body 1 and prevent the occurrence of adverse phenomena such as flooding.
[0028] In this distillation tower, the intake pipe 9 is connected to the external air pump to discharge the air inside the intake chamber 6, making it present a negative pressure state. The fluorine-containing chemical liquid can be sucked into the interior of the intake chamber 6 through the nozzle 8, and then the air flow is changed from coarse to fine through the throat section 10 to accelerate the gas flow rate, so that the gas forms a "vacuum" area on the rear side of the outlet. When this vacuum area is close to the workpiece, it will have a certain adsorption effect on the workpiece, increase the contact area between the gas and liquid phases, thereby enhancing the mass transfer and heat transfer effect, and improving the separation efficiency. Finally, it is sprayed into the interior of the tower body 1 through the diffusion section 11.
[0029] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.
Claims
1. A distillation tower for producing fluorine-containing chemicals, comprising a tower body (1), a reboiler (2), a condenser (3) and a distillation tank (4), characterized in that: A reboiler (2) is provided on one side of the bottom of the tower body (1), a condenser (3) is provided on one side of the top of the tower body (1), a distillation tank (4) is provided at the bottom of one end of the condenser (3), and a plurality of feed pipes (5) are connected to one side of the tower body (1), and a synergistic component is provided on the feed pipes (5); The enhancement component comprises an intake chamber (6), an air intake pipe (9), a throat section (10) and a diffusion section (11); an intake chamber (6) is provided at one end of the feed pipe (5); the top of the intake chamber (6) is connected to the intake pipe (9); one side of the intake chamber (6) is connected to the delivery pipe (7); a throat section (10) is provided inside the feed pipe (5); and a diffusion section (11) is provided at the end of the feed pipe (5) away from the delivery pipe (7).
2. A distillation tower for producing fluorine-containing chemicals according to claim 1, characterized in that: One end of the feed pipe (7) is connected to a nozzle (8), which extends into the interior of the suction chamber (6). The nozzle (8) and the throat section (10) are parallel to each other. One end of the throat section (10) is connected to one end of the diffusion section (11), and the diffusion section (11) is configured as a trumpet-shaped structure.
3. A distillation tower for producing fluorine-containing chemicals according to claim 1, characterized in that: The interior of the tower body (1) is provided with a plurality of separation layers (12), adjacent separation layers (12) are staggered, a packing layer (13) is provided on the top of the separation layer (12), and a plurality of pressure relief valves (14) are connected to the side of the tower body (1) away from the feed pipe (5).
4. A distillation tower for producing fluorine-containing chemicals according to claim 1, characterized in that: The top of the tower body (1) is provided with a top pipe (15), the top of the top pipe (15) is connected to a feed pipe (16), one end of the feed pipe (16) is connected to the input end of the condenser (3), the output end of the condenser (3) is connected to the top of the distillation tank (4) through a connecting pipe (19), one end of the condenser (3) is connected to a cold water inlet (17) and a hot water inlet (18), a reflux pump (26) is fixedly installed at one end of the bottom of the condenser (3), the output end of the reflux pump (26) is connected to the top of the tower body (1) through a reflux pipe (27), and the input end of the reflux pump (26) is connected to the top of the connecting pipe (19) through the reflux pipe (27).
5. The distillation tower for producing fluorine-containing chemicals according to claim 1, characterized in that: The bottom end of the tower body (1) is provided with a bottom pipe (20), one side of the bottom end of the tower body (1) is also connected to a feed pipe (21), and a conveying mechanism is provided between the reboiler (2) and the tower body (1).
6. A distillation tower for producing fluorine-containing chemicals according to claim 5, characterized in that: The conveying mechanism includes a No. 1 pipe (22), a liquid pump (23) and a No. 2 pipe (24). The top of the reboiler (2) is connected to the No. 1 pipe (22), one end of the No. 1 pipe (22) is connected to one end of the feed pipe (21), and a liquid pump (23) is provided below the reboiler (2). The input end of the liquid pump (23) is connected to the bottom end of the bottom pipe (20) through the No. 2 pipe (24), and the output end of the liquid pump (23) is connected to the bottom end of the reboiler (2) through the No. 2 pipe (24), and the outside of the No. 2 pipe (24) is connected to a sewage pipe (25).