Low-energy-consumption variable-pressure rectifying tower
By introducing anti-clogging components and a multi-stage filter structure into the distillation column, the problem of tray clogging was solved, the distillation efficiency and product quality were improved, energy consumption was reused, and energy consumption was reduced.
Patent Information
- Application Number
- CN202423081795.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing distillation columns are prone to clogging of the internal trays, which reduces the gas-liquid contact area and contact time, affecting separation efficiency and product quality, and also results in high energy consumption.
A low-energy-consumption pressure swing distillation column was designed, which adopts anti-clogging components and a multi-stage filter structure, including bubble caps, cross grooves, filters and rotating rollers on the column plates. It prevents the column plates from clogging by filtering impurities and guiding the flow, and uses separation tanks to separate gas-liquid mixtures.
It improves distillation efficiency, avoids tray blockage, reduces energy consumption, improves product quality, and enables the reuse of energy.
Smart Images
Figure CN223542468U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of distillation technology, and in particular to a low-energy-consumption variable pressure distillation column. Background Technology
[0002] With the rapid development of global industry, energy consumption has become an increasingly prominent issue. The chemical industry, as one of the energy-intensive industries, accounts for a significant portion of energy consumption. Traditional distillation is a common separation operation in chemical production, but it is energy-intensive. Statistics show that distillation consumes 30%-50% of the energy in the entire chemical process. Against the backdrop of the energy crisis, reducing the energy consumption of distillation is of great significance for achieving the energy conservation and emission reduction goals of the chemical industry.
[0003] Distillation columns typically use trays to provide a gas-liquid contact area and control the gas-liquid flow rate and direction. However, in existing technologies, the raw material may not be adequately filtered during gas-liquid contact, or solid impurities such as dust and rust may be introduced during storage and transportation. When these impurities reach the trays, they accumulate at the openings, clogging the trays. This reduces the gas-liquid contact area and contact time. Furthermore, the clogging causes changes in local gas-liquid flow rates, leading to alterations in parameters such as pressure and temperature throughout the column. This affects the overall separation efficiency and makes product quality difficult to control. Utility Model Content
[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.
[0005] Specifically, the technical problem to be solved by this utility model is to provide a low-energy-consumption variable pressure distillation column to solve the technical problem of internal tray blockage in current distillation columns.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0007] A low-energy-consumption pressure-switching distillation column includes a high-pressure column body, a distillation chamber inside the high-pressure column body, a feed pipe fixedly connected to one side of the distillation chamber near the center, an air inlet pipe fixedly connected to the other side of the distillation chamber near the bottom, an air outlet opening at the top of the distillation chamber, a conveying pipe fixedly connected to the inner wall of the air outlet, the other end of the conveying pipe being connected to a low-pressure column body, the air inlet pipe of the low-pressure column body being fixedly connected to the conveying pipe, and multiple tray components fixedly connected inside the distillation chamber.
[0008] The tray component includes a tray fixedly connected to the distillation chamber. An overflow weir is fixedly connected to one side of the upper surface of the tray. A downcomer is fixedly connected to the outside of the overflow weir. A downcomer groove is opened inside the downcomer. Multiple air holes are opened inside the tray. Multiple anti-clogging components are fixedly connected above the tray. The anti-clogging components are located above the air holes.
[0009] As an improved technical solution, the anti-clogging component includes a bubble cap fixedly connected to the tower plate, a vent pipe inside the bubble cap, a sealing plate slidably connected inside the vent pipe, a lifting column fixedly connected to the upper end of the sealing plate, the top end of the lifting column penetrating the bubble cap and slidably connected to the bubble cap, an elastic element fixedly connected to the top of the inner cavity of the bubble cap, and the other end of the elastic element fixedly connected to the upper surface of the sealing plate.
[0010] As an improved technical solution, the outer wall of the blister pack is provided with multiple horizontal grooves near the bottom, and the top of the horizontal grooves is at the same level as the top of the overflow weir.
[0011] As an improved technical solution, a secondary filter screen is fixedly connected near the inner side of the transverse groove cavity, and another secondary filter screen is fixedly connected to the bottom of the transverse groove cavity near the outer side, with a primary filter screen provided above the other secondary filter screen.
[0012] As an improved technical solution, rotating rollers are rotatably connected to both sides of the inner cavity of the transverse groove near the bottom, and multiple guide vanes are fixedly connected to the outer wall of the rotating rollers. The secondary filter screen is attached to the other end of the guide vanes.
[0013] As an improved technical solution, a liquid receiving tank is provided on the other side of the upper surface of the tray, and the top side of the liquid receiving tank is fixedly connected to the bottom of the tray.
[0014] As an improved technical solution, multiple separation tanks are fixedly connected to the top of the inner cavity of the distillation chamber.
[0015] After adopting the above technical solution, the beneficial effects of this utility model are:
[0016] 1. This utility model allows vapor to enter the distillation chamber through an inlet pipe. As the gas passes through the tray, the sealing plate inside the tray moves upward under pressure, allowing the gas to come into contact with the liquid through the transverse groove. As the gas-liquid mixture flows through the transverse groove, the secondary filter inside the groove filters out impurities. At the same time, the rotating roller inside the transverse groove rotates, guiding the gas-liquid mixture containing impurities downward. The secondary filter at the bottom of the primary filter further filters the mixture, allowing impurities inside the gas-liquid mixture to be collected at the bottom of the transverse groove. This improves the efficiency of distillation and also prevents tray blockage.
[0017] 2. In this invention, the vapor rising through the trays carries components with different boiling points. When the vapor enters the separation tank, the flow rate of the vapor decreases due to the sudden increase in space. Based on the density difference between the gas and liquid, the liquid will settle to the bottom of the separation tank under the action of gravity. The upward vapor is separated by the separation tank at the top of the distillation chamber, while the vapor continues to rise through the conveying pipe to the low-pressure tower for distillation, so that the energy consumption can be reused. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0019] Figure 1 This is a schematic diagram of the overall structure of the low-energy-consumption variable pressure distillation column of this utility model.
[0020] Figure 2 This is a schematic diagram of the internal structure of the low-energy-consumption variable pressure distillation column of this utility model.
[0021] Figure 3 This is a schematic diagram of the tray components of the low-energy-consumption variable pressure distillation column of this utility model.
[0022] Figure 4 This is a schematic diagram of the anti-clogging component structure of the low-energy-consumption variable pressure distillation column of this utility model.
[0023] Figure 5 This utility model relates to a low-energy-consumption pressure swing distillation column. Figure 4 Enlarged structural diagram at point A.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. High-pressure tower body; 11. Low-pressure tower body; 12. Conveying pipe; 13. Air inlet pipe; 14. Feed inlet pipe;
[0026] 2. Tray components; 21. Tray; 22. Vent; 23. Liquid receiving tank; 24. Overflow weir; 25. Downcomer; 26. Anti-clogging component; 27. Downcomer;
[0027] 260. Bubble cap; 261. Horizontal groove; 262. Vent pipe; 263. Lifting column; 264. Elastic element; 265. Primary filter screen; 266. Sealing plate; 267. Secondary filter screen; 268. Guide vane; 269. Rotating roller;
[0028] 3. Distillation chamber; 31. Separation tank; 32. Gas outlet. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0031] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.
[0032] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0033] like Figure 3 and Figure 4 As shown in the figure, this embodiment provides a low-energy-consumption pressure-switching distillation column. The low-energy-consumption pressure-switching distillation column includes a high-pressure column body 1, a distillation chamber 3 is opened inside the high-pressure column body 1, a feed pipe 14 is fixedly connected to one side of the distillation chamber 3 near the center, an air inlet pipe 13 is fixedly connected to the other side of the distillation chamber 3 near the bottom, an air outlet 32 is opened at the top of the distillation chamber 3, a conveying pipe 12 is fixedly connected to the inner wall of the air outlet 32, the other end of the conveying pipe 12 is connected to the low-pressure column body 11, the air inlet pipe 13 of the low-pressure column body 11 is fixedly connected to the conveying pipe 12, and multiple tray components 2 are fixedly connected inside the distillation chamber 3.
[0034] The tray component 2 includes a tray 21 fixedly connected to the distillation chamber 3. An overflow weir 24 is fixedly connected to one side of the upper surface of the tray 21. A downcomer 25 is fixedly connected to the outside of the overflow weir 24. A downcomer groove 27 is opened inside the downcomer 25. Multiple vent holes 22 are opened inside the tray 21. Multiple anti-clogging components 26 are fixedly connected above the tray 21. The anti-clogging components 26 are located above the vent holes 22. The raw material is distilled through multiple trays 21, and the anti-clogging components 26 prevent the trays 21 from clogging.
[0035] The anti-clogging component 26 includes a bubble cap 260 fixedly connected to the tray 21. A vent pipe 262 is provided inside the bubble cap 260. A sealing plate 266 is slidably connected inside the vent pipe 262. A lifting column 263 is fixedly connected to the upper end of the sealing plate 266. The top end of the lifting column 263 passes through the bubble cap 260 and is slidably connected to the bubble cap 260. An elastic element 264 is fixedly connected to the top of the inner cavity of the bubble cap 260. The other end of the elastic element 264 is fixedly connected to the upper surface of the sealing plate 266. When the gas passes through the tray 21, the sealing plate 266 inside the tray 21 is moved upward by the gas pressure, so that the gas can pass through the tray and mix with the liquid.
[0036] Multiple transverse grooves 261 are provided on the outer wall of the bubble cap 260 near the bottom. The top of the transverse grooves 261 is at the same level as the top of the overflow weir 24, and the gas comes into contact with the liquid through the transverse grooves 261.
[0037] A secondary filter 267 is fixedly connected to the inner side of the transverse groove 261, and another secondary filter 267 is fixedly connected to the bottom of the inner side of the transverse groove 261. A primary filter 265 is provided above the other secondary filter 267. The secondary filter 267 is used to filter impurities inside the gas-liquid mixture.
[0038] like Figure 1 , Figure 2 and Figure 5 As shown, rotating rollers 269 are rotatably connected to both sides of the inner cavity of the transverse groove 261 near the bottom. Multiple guide vanes 268 are fixedly connected to the outer wall of the rotating rollers 269. A secondary filter screen 267 is attached to the other end of the guide vanes 268. The rotating rollers 269 inside the transverse groove 261 rotate to guide the gas-liquid mixture containing impurities downward. At the same time, the secondary filter screen 267 at the bottom of the primary filter screen 265 filters it, so that the impurities inside the gas-liquid mixture are collected at the bottom of the transverse groove 261.
[0039] A liquid receiving tank 23 is provided on the other side of the upper surface of the tray 21. The top side of the liquid receiving tank 23 is fixedly connected to the bottom of the tray 21. The liquid receiving tank 23 serves as a buffer when the liquid flows down from the previous tray 21, so as to avoid leakage of the tray 21 due to excessive impact force.
[0040] Multiple separation tanks 31 are fixedly connected to the top of the inner cavity of the distillation chamber 3, and the upward steam is separated through the separation tanks 31 at the top of the distillation chamber 3.
[0041] In operation, vapor enters the distillation chamber 3 through the inlet pipe. As the gas passes through the tray 21, the sealing plate 266 inside the tray 21 moves upward under pressure, allowing the gas to come into contact with the liquid through the transverse groove 261. As the gas-liquid mixture flows through the transverse groove 261, the secondary filter 267 inside the transverse groove 261 filters out impurities. At the same time, the rotating roller 269 inside the transverse groove 261 rotates, guiding the gas-liquid mixture containing impurities downward. Simultaneously, the secondary filter 267 at the bottom of the primary filter 265 filters it, causing impurities inside the gas-liquid mixture to be collected at the bottom of the transverse groove 261. The upward vapor is then separated by the separation tank 31 at the top of the distillation chamber 3, while the vapor continues to rise through the conveying pipe 12 to be distilled in the low-pressure tower, thus reusing energy.
[0042] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.
Claims
1. A low-energy-consumption pressure swing distillation column, comprising a high-pressure column body (1), characterized in that: The high-pressure tower body (1) has a distillation chamber (3) inside. A feed pipe (14) is fixedly connected to one side of the distillation chamber (3) near the center. An air inlet pipe (13) is fixedly connected to the other side of the distillation chamber (3) near the bottom. An air outlet (32) is opened at the top of the distillation chamber (3). A conveying pipe (12) is fixedly connected to the inner wall of the air outlet (32). The other end of the conveying pipe (12) is connected to the low-pressure tower body (11). The air inlet pipe (13) of the low-pressure tower body (11) is fixedly connected to the conveying pipe (12). Multiple tray components (2) are fixedly connected inside the distillation chamber (3). The tray component (2) includes a tray (21) fixedly connected to the distillation chamber (3). An overflow weir (24) is fixedly connected to one side of the upper surface of the tray (21). A downcomer block (25) is fixedly connected to the outside of the overflow weir (24). A downcomer groove (27) is opened inside the downcomer block (25). A plurality of vent holes (22) are opened inside the tray (21). A plurality of anti-clogging components (26) are fixedly connected above the tray (21). The anti-clogging components (26) are located above the vent holes (22).
2. The low-energy-consumption pressure swing distillation column according to claim 1, characterized in that: The anti-clogging component (26) includes a bubble cap (260) fixedly connected to the tower plate (21). The bubble cap (260) is provided with a vent pipe (262) inside. A sealing plate (266) is slidably connected inside the vent pipe (262). A lifting column (263) is fixedly connected to the upper end of the sealing plate (266). The top end of the lifting column (263) passes through the bubble cap (260) and is slidably connected to the bubble cap (260). An elastic element (264) is fixedly connected to the top of the inner cavity of the bubble cap (260). The other end of the elastic element (264) is fixedly connected to the upper surface of the sealing plate (266).
3. The low-energy-consumption pressure swing distillation column according to claim 2, characterized in that: The outer wall of the blister pack (260) is provided with a plurality of horizontal grooves (261) near the bottom, and the top of the horizontal grooves (261) is at the same level as the top of the overflow weir (24).
4. The low-energy-consumption pressure swing distillation column according to claim 3, characterized in that: A secondary filter (267) is fixedly connected to the inner side of the transverse groove (261), and another secondary filter (267) is fixedly connected to the bottom of the inner side of the transverse groove (261), with a primary filter (265) above the other secondary filter (267).
5. The low-energy-consumption pressure swing distillation column according to claim 4, characterized in that: Rotating rollers (269) are rotatably connected to both sides of the inner cavity of the transverse groove (261) near the bottom. Multiple guide vanes (268) are fixedly connected to the outer wall of the rotating rollers (269). The secondary filter screen (267) is attached to the other end of the guide vanes (268).
6. The low-energy-consumption pressure swing distillation column according to claim 1, characterized in that: A liquid receiving tank (23) is provided on the other side of the upper surface of the tower plate (21), and the top side of the liquid receiving tank (23) is fixedly connected to the bottom of the tower plate (21).
7. The low-energy-consumption pressure swing distillation column according to claim 1, characterized in that: The top of the inner cavity of the distillation chamber (3) is fixedly connected to multiple separation tanks (31).