Degassing tower for vinyl acetylene production

Abstract

This utility model relates to the technical field of vinyl acetylene production, and more particularly to a degassing tower for vinyl acetylene production. The degassing tower includes: a degassing tower body, a platform, a tightening assembly, a degassing pipe, and a spring assembly. A brine return pipe is located at the top left side of the degassing tower body; a liquid inlet pipe is located at the middle left side of the degassing tower body; a desorption tower return gas pipe is located at the bottom left side of the degassing tower body; a brine inlet pipe is located at the middle right side of the degassing tower body; a liquid removal pipe is located at the bottom right side of the degassing tower body; a pump body is fixedly connected to the end of the liquid removal pipe furthest from the degassing tower body; a platform is installed at the top right side of the degassing tower body; and a cooler is installed at the top of the platform. This utility model reduces acetylene consumption without affecting product quality, improves the purity of relevant product components, ensures the sealing of connection parts, prevents gas leakage, and ensures continuous and efficient production.

Description

Technical Field

[0001] This utility model relates to the technical field of vinyl acetylene production, and in particular to a degassing tower for vinyl acetylene production. Background Technology

[0002] Vinylacetylene is an unsaturated alkyne commonly used in the synthesis of products such as chloroprene rubber. It is flammable and explosive. During its production, unreacted gases such as acetylene and ethylene dissolve in the reaction liquid. The role of the degassing tower is to separate and remove these dissolved gases from the reaction liquid through relevant processes. This not only prevents the gas from accumulating in subsequent processes and causing safety hazards, but also recovers useful gases and ensures the processing efficiency of subsequent equipment such as desorption towers for the reaction liquid.

[0003] In the process of producing chloroprene rubber from calcium carbide, the absorbent liquid in the acetylene dimerization step is heated to 45-50 degrees Celsius before entering the degassing tower, where most of the acetylene is naturally released. If the inlet liquid temperature is increased, it is beneficial to the degassing effect, but it will also release vinyl acetylene from the absorbent liquid. The high vinyl acetylene content in the released acetylene will increase the absorption load on the absorbent tower, leading to higher material and energy consumption. Conversely, if the inlet liquid temperature is decreased, it is detrimental to the degassing effect, resulting in a low acetylene release rate. During the desorption process in the desorption tower, acetylene will be released along with the vinyl acetylene. Furthermore, during the condensation of the vinyl acetylene, the acetylene also condenses and dissolves in the liquid vinyl acetylene, ultimately reducing the purity of the vinyl acetylene and affecting product quality.

[0004] Therefore, it is necessary to provide a new degassing tower for vinyl acetylene production to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a degassing tower for vinyl acetylene production.

[0006] This utility model provides a degassing tower for vinyl acetylene production, comprising: a degassing tower body, a platform, a tightening assembly, a degassing pipe, and a spring assembly. A brine return pipe is located at the top left side of the degassing tower body; a liquid inlet pipe is located at the middle left side of the degassing tower body; a desorption tower return gas pipe is located at the bottom left side of the degassing tower body; a brine inlet pipe is located at the middle right side of the degassing tower body; a liquid stripping pipe is located at the bottom right side of the degassing tower body; a pump body is fixedly connected to the end of the liquid stripping pipe furthest from the degassing tower body; and a platform is installed at the top right side of the degassing tower body. A cooler is installed at the top of the platform. The input end of the cooler and the top of the brine return pipe are both fixedly connected to a transmission pipe. The output end of the cooler is fixedly connected to an output pipe. The top of the transmission pipe is fixedly connected to an assembly plate one. The top of the assembly plate one is fixedly connected to an assembly plate two by a tightening assembly. The inner walls of the two assembly plates two are fixedly connected to a degassing pipe. The bottom inner wall of the assembly plate two is slidably connected to a sliding ring. The bottom of the sliding ring is fixedly connected to a sealing ring. The top of the assembly plate one is provided with a sealing groove. An elastic component is installed inside the assembly plate two.

[0007] Preferably, the tightening assembly includes multiple bolts, the outer surfaces of which are inserted into the inner walls of the mounting plates 1 and 2, and the outer bottom ends of the bolts are threaded with nuts.

[0008] Preferably, the elastic component includes multiple sliding rods, the outer sides of the multiple sliding rods are slidably connected to the inner top wall of the second assembly plate, the outer part of the sliding rod inside the second assembly plate is fitted with a strong spring, and the bottom end of the multiple sliding rods is fixedly connected to a limit ring.

[0009] Preferably, the bottom end of the platform is symmetrically and fixedly connected with load-bearing plates, and the left sides of the two load-bearing plates and the right side of the degassing tower body are fixedly connected below the platform.

[0010] Preferably, the outer bottom end of the sealing ring fits into the inner wall of the sealing groove.

[0011] Preferably, the top end of the nut contacts the bottom end of the mounting plate.

[0012] Preferably, the bottom end of the limiting ring is fixedly connected to the top end of the sliding ring, and the outer side of the limiting ring is slidably connected to the inner wall of the assembly plate.

[0013] Preferably, the top end of the strong spring is fixedly connected to the top end of the inner wall of the second assembly plate, and the bottom end of the strong spring is fixedly connected to the top end of the limiting ring.

[0014] Compared with related technologies, the degassing tower for vinyl acetylene production provided by this utility model has the following beneficial effects: Degassing effect and component recovery optimization: By installing a cooler at the top of the tower, heat exchange is used to cool the mixed gas, causing vinyl acetylene to condense and reflux. This not only recovers useful components but also optimizes the composition of the degassed gas. This solves the problem in related technologies where increased inlet liquid temperature leads to higher vinyl acetylene content in the degassed acetylene gas and increased absorption tower load, effectively reducing the vinyl acetylene content in the degassed acetylene gas. Simultaneously, the degassed liquid has a low acetylene content after treatment, which further reduces the acetylene content in the vinyl acetylene during subsequent desorption and condensation, improving the purity of relevant components in the product.

[0015] Stable operation and sealing assurance: The tightening assembly, sealing ring, and elastic assembly at the assembly plate work together. The tightening assembly is tightly connected to the assembly plate by bolts and nuts, providing the foundation for the sealing structure; the sealing ring is embedded in the sealing groove to fill the gap, and the elastic assembly, with the help of a strong spring, sliding rod, and limit ring, ensures that the sealing ring and sealing groove remain tightly fitted even when the gas flows and vibrates, ensuring the sealing of the connection, preventing gas leakage, maintaining the stability of the degassing tower and subsequent gas transportation and processing processes, and ensuring continuous and efficient production.

[0016] Energy consumption and cost control: Due to the improved degassing effect, the acetylene content in the degassing liquid is low, reducing the additional energy consumption that may be required for subsequent processing due to high acetylene content, thus reducing acetylene consumption. Furthermore, the entire process ensures stable production without affecting product quality. By focusing on raw material recovery and energy consumption control, it helps reduce overall production costs while guaranteeing product quality. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a degassing tower for vinyl acetylene production provided by this utility model; Figure 2 for Figure 1 The diagram shown is a schematic of the degassing tube. Figure 3 for Figure 2 Enlarged view of point A in the image.

[0018] The following are the labels in the diagram: 1. Degassing tower body; 2. Brine return pipe; 3. Liquid inlet pipe; 4. Desorption tower return gas pipe; 5. Brine inlet pipe; 6. Desiccant pipe; 7. Pump body; 8. Platform; 9. Load-bearing plate; 10. Cooler; 11. Transmission pipe; 12. Output pipe; 13. Assembly plate one; 14. Assembly plate two; 15. Bolt; 16. Nut; 17. Degassing pipe; 18. Sliding ring; 19. Sealing ring; 20. Sealing groove; 21. Sliding rod; 22. Strong spring; 23. Limiting ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figures 1 to 3 A degassing tower for vinyl acetylene production includes: a degassing tower body 1, which is a vertical cylindrical tower structure. A brine return pipe 2 is welded and fixed to the top left side of the degassing tower body 1. A liquid inlet pipe 3 is also welded and installed to the middle left side of the degassing tower body 1. The diameter of the liquid inlet pipe 3 is slightly larger than that of the brine return pipe 2 to facilitate the rapid inflow of the reaction liquid. A desorption tower return gas pipe 4 is connected to the bottom left side of the degassing tower body 1. The end of the pipe is equipped with a flange structure for connection with the corresponding interface of the desorption tower. A brine inlet pipe 5 with the same diameter as the brine return pipe 2 is installed at the middle right side of the degassing tower body 1. A descaling pipe 6 is welded and fixed to the bottom right side of the degassing tower body 1. A horizontal pump body 7 is fixedly connected to the end of the descaling pipe 6 away from the degassing tower body 1 through a flange. The platform 8 is fixedly installed on the top right side of the degassing tower body 1. The bottom of the platform 8 is symmetrically fixedly connected to the load-bearing plates 9. The left sides of the two load-bearing plates 9 are fixedly connected to the right side of the degassing tower body 1 below the platform 8. A cooler 10 is installed on the top of the platform 8 by anchor bolts. The input end of the cooler 10 and the top of the brine return pipe 2 are both fixedly connected to the transmission pipe 11. The pipe wall of the transmission pipe 11 is provided with a heat insulation layer. The output end of the cooler 10 is fixedly connected to the output pipe 12. The outer top of the transmission pipe 11 is fixedly connected to the assembly plate 13. The tightening assembly is a component used for fixed connection. The top of the first assembly plate 13 is fixedly connected to the second assembly plate 14, which is the same size as the first assembly plate 13, through the tightening assembly. The tightening assembly includes a plurality of evenly distributed bolts 15. The outer surfaces of the bolts 15 are inserted into the inner walls of the corresponding positions of the first assembly plate 13 and the second assembly plate 14. The threaded part of the bolt 15 is provided with fine threads. The bottom of the outer surface of the bolt 15 is threaded with a nut 16. The top of the nut 16 contacts the bottom of the first assembly plate 13, and the contact part is provided with an anti-slip pad. The degassing pipe 17 is fixedly connected to the inner wall of the two assembly plates 14. The inner wall of the bottom end of the assembly plate 14 is slidably connected to a sliding ring 18. The inner wall of the sliding ring 18 fits against the outer wall of the degassing pipe 17. The bottom end of the sliding ring 18 is fixedly connected to a sealing ring 19. The top end of the assembly plate 13 is provided with a sealing groove 20 that matches the sealing ring 19. The outer bottom end of the sealing ring 19 fits against the inner wall of the sealing groove 20. The fit is tight and without gaps.

[0022] The elastic component is installed inside the assembly plate 2 14. The elastic component includes multiple circumferentially distributed sliding rods 21. The outer parts of the multiple sliding rods 21 are slidably connected to the inner wall of the top of the assembly plate 2 14. The sliding rods 21 can move freely along the axial direction. The part of the sliding rods 21 inside the assembly plate 2 14 is fitted with a strong spring 22. The strong spring 22 has good elastic recovery ability. The bottom end of the multiple sliding rods 21 is fixedly connected to a limiting ring 23. The bottom end of the limiting ring 23 is fixedly connected to the top of the sliding ring 18. The outer part of the limiting ring 23 is slidably connected to the inner wall of the assembly plate 2 14. The top end of the strong spring 22 is fixedly connected to the top of the inner wall of the assembly plate 2 14. The bottom end of the strong spring 22 is fixedly connected to the top end of the limiting ring 23.

[0023] The working principle of the degassing tower for vinyl acetylene production provided by this utility model is as follows: The production system delivers the reaction liquid to be processed to the middle left side of the degassing tower body 1 through the inlet pipe 3. After entering the tower, the reaction liquid gradually fills the lower space of the tower body, providing a raw material basis for the subsequent degassing process. At the same time, low-temperature brine enters the tower from the brine inlet pipe 5 at the middle right side of the degassing tower body 1. It flows in the tower pipe and exchanges heat with the reaction liquid, creating favorable conditions for gas separation by lowering the temperature inside the tower. After completing the heat exchange, the brine is discharged through the brine return pipe 2 at the top left side, realizing the recycling of brine. The desorption tower return gas pipe 4 at the bottom left side of the degassing tower body 1 continuously introduces return gas from the desorption tower. After entering the tower, these gases come into full contact with the reaction liquid, breaking the dissolution balance of the gases in the reaction liquid, causing the dissolved acetylene, ethylene and other gases in the reaction liquid to gradually escape and accumulate upward, preparing for subsequent separation and processing. As the degassing process proceeds, the degassing liquid in the lower part of the tower gradually reaches the processing requirements. At this time, the degassing liquid pipe 6 at the bottom right side of the degassing tower body 1 begins to discharge the degassing liquid. The pump body 7 at the end of the degassing liquid pipe 6 starts, and the pressure generated by the operation of the pump body 7 pushes the degassing liquid to flow in the pipe, stably transporting it to the desorption tower for the next step of processing, ensuring that the liquid level in the tower is maintained within a reasonable range. The platform 8 at the top right side of the degassing tower body 1 provides stable support for the cooler 10. The mixed gas generated during the degassing process moves upward to the top area of ​​the tower and enters the processing flow of the cooler 10 through the degassing pipe 17. After the cooler 10 is started, it receives the low-temperature medium from the brine return pipe 2 through the transmission pipe 11 and uses the heat exchange principle to cool the mixed gas, so that the easily condensable vinyl acetylene component in the gas is converted into liquid and returned to the tower through the output pipe 12 to realize the recovery of useful components. At the connection between the degassing pipe 17 and the transmission pipe 11, the first assembly plate 13 and the second assembly plate 14 are fixedly connected by tightening components. The operator tightens the bolt 15 so that the bolt 15 passes through the corresponding hole of the first assembly plate 13 and the second assembly plate 14. Then, the two assembly plates are tightly fitted together by the thread engagement of the nut 16 and the bolt 15, providing a structural basis for the sealing of the connection. During the gas flow through the degassing pipe 17, the sliding ring 18 on the inner wall of the assembly plate 14 will undergo slight displacement due to vibration. The sliding ring 18 drives the sealing ring 19 at its bottom to move synchronously, causing the sealing ring 19 to embed into the sealing groove 20 at the top of the assembly plate 13. Since the outer bottom end of the sealing ring 19 fits into the inner wall of the sealing groove 20, it can effectively fill the connection gap, prevent gas leakage, and ensure the airtightness of gas transmission. The elastic component plays an auxiliary role in the sealing process. When the sliding ring 18 is displaced due to vibration, it will drive the limiting ring 23 to move synchronously. The limiting ring 23 pushes the sliding rod 21 in the assembly plate 13. The inner wall of the second plate 14 slides. At this time, the strong spring 22 outside the sliding rod 21 undergoes elastic deformation due to the compression of the limiting ring 23, generating a reverse elastic force that acts on the limiting ring 23. This ensures that the limiting ring 23 always applies downward pressure to the sliding ring 18, ensuring that the sealing ring 19 and the sealing groove 20 remain in a tight fit. Even during vibration, a good sealing effect can be maintained. The gas processed by the cooler 10 continues to be transported to the absorption tower for recycling through the degassing pipe 17. The liquid vinyl acetylene separated by the cooler 10 flows back into the degassing tower and re-enters the degassing liquid to participate in subsequent processing.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A degassing tower for vinyl acetylene production, characterized in that, include: The degassing tower body (1) has a brine return pipe (2) at the top left side, a liquid inlet pipe (3) at the middle left side, a desorption tower return gas pipe (4) at the bottom left side, a brine inlet pipe (5) at the middle right side, and a liquid removal pipe (6) at the bottom right side. A pump body (7) is fixedly connected to the end of the liquid removal pipe (6) away from the degassing tower body (1). Platform (8), the top right side of the degassing tower body (1) is equipped with platform (8), the top of platform (8) is equipped with cooler (10), the input end of cooler (10) and the top of brine return pipe (2) are both fixedly connected with transmission pipe (11), the output end of cooler (10) is fixedly connected with output pipe (12), and the top of transmission pipe (11) is fixedly connected with assembly plate (13). Tightening assembly, the top of assembly plate one (13) is fixedly connected to assembly plate two (14) by tightening assembly. Degassing pipe (17), the inner walls of the two assembly plates (14) are fixedly connected to the degassing pipe (17), the bottom inner wall of the assembly plate (14) is slidably connected to the sliding ring (18), the bottom end of the sliding ring (18) is fixedly connected to the sealing ring (19), and the top end of the assembly plate (13) is provided with a sealing groove (20). Elastic assembly, the elastic assembly is installed inside the assembly plate two (14).

2. The degassing tower for vinyl acetylene production according to claim 1, characterized in that, The tightening assembly includes multiple bolts (15), the outer sides of which are inserted into the inner walls of the corresponding positions of the first assembly plate (13) and the second assembly plate (14), and the outer bottom ends of the bolts (15) are threaded with nuts (16).

3. A degassing tower for vinyl acetylene production according to claim 1, characterized in that, The elastic component includes multiple sliding rods (21), the outer side of the multiple sliding rods (21) is slidably connected to the inner wall of the top of the assembly plate two (14), the outer part of the sliding rods (21) inside the assembly plate two (14) is fitted with a strong spring (22), and the bottom end of the multiple sliding rods (21) is fixedly connected with a limit ring (23).

4. A degassing tower for vinyl acetylene production according to claim 1, characterized in that, The bottom end of the platform (8) is symmetrically and fixedly connected with load-bearing plates (9). The left side of the two load-bearing plates (9) and the right side of the degassing tower body (1) are fixedly connected below the platform (8).

5. A degassing tower for vinyl acetylene production according to claim 1, characterized in that, The outer bottom end of the sealing ring (19) fits into the inner wall of the sealing groove (20).

6. A degassing tower for vinyl acetylene production according to claim 2, characterized in that, The top of the nut (16) contacts the bottom of the mounting plate (13).

7. A degassing tower for vinyl acetylene production according to claim 3, characterized in that, The bottom end of the limiting ring (23) is fixedly connected to the top end of the sliding ring (18), and the outside of the limiting ring (23) is slidably connected to the inner wall of the assembly plate (14).

8. A degassing tower for vinyl acetylene production according to claim 3, characterized in that, The top end of the strong spring (22) is fixedly connected to the top end of the inner wall of the assembly plate (14), and the bottom end of the strong spring (22) is fixedly connected to the top end of the limiting ring (23).

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