An acetate recovery rectification column with heating device
By employing a cross-shaped heating tube and a multi-reflux tube condenser design in the acetate recovery distillation column, the problem of complex operation of traditional equipment is solved, achieving efficient acetate recovery and stable recovery of dilute acetic acid solution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 河南金鹏化工有限公司
- Filing Date
- 2025-07-02
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional acetate recovery equipment is complex to operate, resulting in low production efficiency.
Design an acetate recovery distillation column with a heating device, using cross-shaped heating tubes combined with multiple reflux tubes and a condenser to achieve efficient condensation and reflux of steam, thereby improving distillation accuracy and the recovery rate of dilute acetic acid solution.
It simplifies equipment operation, improves production efficiency and the recovery performance of dilute acetic acid solution, and ensures the continuity and stability of the recovery process.
Smart Images
Figure CN224292555U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of acetic acid recovery technology, specifically to an acetate ester recovery distillation tower with a heating device. Background Technology
[0002] Acetic acid recovery distillation column is a device for purifying and recovering dilute acetic acid solutions generated in chemical production in factories.
[0003] During operation, steam is used to heat the dilute acetic acid in the distillation column. The steam at the top of the distillation column is condensed by a condenser that uses circulating water as the cooling medium, and the hot acid in the bottom of the column is also condensed into liquid acetic acid by circulating cooling water and thus recovered.
[0004] Currently, traditional acetate recovery equipment typically includes multiple reaction vessels, condensers, storage tanks, etc. The connections and operations between these devices are quite complex, resulting in high operational difficulty and low production efficiency.
[0005] To address the aforementioned issues, we propose an acetate recovery distillation column equipped with a heating device. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an acetate recovery distillation column with a heating device to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: an acetate recovery distillation column with a heating device, comprising an acetate recovery column body, a mounting base disposed at the bottom of the column body, and a base docked with the mounting base. A heating device is disposed at the bottom of the column body through the mounting base. The heating device includes a first heating tube and a second heating tube arranged in a cross shape inside the column body. The bottom of the first heating tube and the second heating tube are both connected to terminals. A terminal block is slidably disposed at the lower end of the terminal block. A terminal post electrically connected to the terminal block is disposed inside the terminal block.
[0008] Preferably, the tower body includes an exhaust pipe connected to the condenser at the top, a return pipe connected to the cooler at the side, and a discharge pipe at the bottom. The discharge pipe may also be equipped with a pipe connector with a filter for filtration, and can also be removed for replacement.
[0009] Preferably, a pressure sensor is provided on the right side of the top of the tower body near the exhaust pipe, a liquid level sensor is provided on the left side of the top of the tower body near the exhaust pipe, and a temperature sensor is also provided on the side of the tower body at the symmetrical end of the return pipe.
[0010] Preferably, three return pipes are provided on the side of the tower body. The ends of the three return pipes that are away from the tower body converge and connect to the cooler. The upper end of the cooler is connected to the condenser through a pipe.
[0011] Preferably, the pressure sensor, level sensor, and temperature sensor are all made of acid-resistant materials, which improves the corrosion resistance and service life of the sensing equipment.
[0012] Preferably, the inner wall of the tower body is made of enamel material, which improves the corrosion resistance of the tower body, makes it less prone to scaling, and is easy to clean. The first heating tube and the second heating tube are both made of stainless steel.
[0013] Preferably, the mounting base includes a cylinder nested on the lower outer wall of the tower body, and a first flange is fixedly provided at the lower end of the cylinder.
[0014] Preferably, the base includes a second flange that mates with the first flange, and the lower end of the second flange is provided with a rectangular support column.
[0015] Preferably, a third flange is provided at the lower end of the support column, and a support foot is provided at the lower end of the third flange corresponding to the support column.
[0016] Preferably, the support column is inclined inward between the second flange and the support leg.
[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention utilizes a wiring board installed at the bottom of the tower heating device. Electrical wires are connected to the wiring terminals within the wiring board, energizing the heating elements inside the first and second heating tubes. This heat causes partial vaporization of the liquid within the tower. The resulting steam flows upwards and connects to a condenser through an exhaust pipe, converting the steam back into liquid. The liquid then flows back into the tower through a reflux pipe for secondary processing. This improves the accuracy of the substances to be separated during distillation and enhances the distillation precision. This also improves the recovery rate of dilute acetic acid solution and enhances the recovery performance of the device. Several reflux pipes are installed, allowing reflux to occur at different heights on the mounting base. The refluxed acetic acid solution then converges at the ends of the multiple reflux pipes away from the tower body and connects to a cooler. The rising vapor in the tower first flows through the condenser, and then a portion of the condensed dilute acetic acid solution flows into the cooler as product, while the remaining portion flows back into the tower body as reflux liquid. This ensures the continuity and stability of the recovery process and effectively achieves the goal of recovering acetate esters. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall front view of the present invention;
[0019] Figure 2 This is a schematic diagram of the tower structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the bottom cross-section structure of the tower body of this utility model;
[0021] Figure 4 yes Figure 3 Enlarged structural diagram of section A in the middle;
[0022] Figure 5 This is a schematic diagram of the base structure of this utility model.
[0023] The diagram shows the following labels: 1. Tower body; 2. Mounting base; 3. Base; 4. Exhaust pipe; 5. Return pipe; 6. Pressure sensor; 7. Liquid level sensor; 8. Temperature sensor; 9. Shell; 10. First flange; 11. Heating device; 12. First heating tube; 13. Second heating tube; 14. Terminal block; 15. Terminal block; 16. Discharge pipe; 17. Terminal post; 18. Second flange; 19. Support column; 20. Third flange; 21. Support leg. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example 1
[0025] like Figure 1-2 As shown, this embodiment discloses an acetate recovery distillation column with a heating device, including an acetate recovery column body 1, a mounting base 2 disposed at the bottom of the column body 1, and a base 3 docking with the mounting base 2. A heating device 11 is disposed at the bottom of the column body 1 through the mounting base 2. The heating device 11 includes a first heating tube 12 and a second heating tube 13 arranged in a cross shape inside the column body 1. The bottom of the first heating tube 12 and the second heating tube 13 are connected to a terminal block 14. A terminal block 15 is slidably disposed at the lower end of the terminal block 14. A terminal post 17 electrically connected to the terminal block 14 is disposed inside the terminal block 15.
[0026] In this embodiment, the exhaust pipe 4 on the tower body 1 is connected to the condenser, and the lower end of the condenser is connected to the cooler. Furthermore, the exhaust pipe 5 is connected to the cooler after passing through the end away from the tower body 1. This allows the steam rising from the tower body 1 to first flow through the condenser, and then the condensed dilute acetic acid solution will flow into the cooler as a product. The other part will flow back into the tower body 1 as reflux liquid through the reflux pipe 5 for secondary processing.
[0027] In this embodiment, the tower body 1 is also equipped with a pressure sensor 6, a liquid level sensor 7, and a temperature sensor 8 to observe the interior of the tower body 1, including its internal temperature, pressure, and acetic acid capacity. The pressure sensor 6, liquid level sensor 7, and temperature sensor 8 are all made of acid-resistant materials, exhibiting high corrosion resistance and a long service life. Furthermore, the inner wall of the tower body 1 is made of enamel material, which has strong corrosion resistance, is easy to clean, does not produce scale, and has high heat transfer efficiency. Simultaneously, by improving corrosion resistance and extending equipment lifespan, the frequency of maintenance and replacement due to equipment corrosion is reduced, ensuring the continuity and stability of the recovery process and thus simplifying the recovery work. Example 2
[0028] like Figure 1-5 As shown, this embodiment discloses an acetate recovery distillation column with a heating device, including an acetate recovery column body 1, a mounting base 2 disposed at the bottom of the column body 1, and a base 3 docking with the mounting base 2. A heating device 11 is disposed at the bottom of the column body 1 through the mounting base 2. The heating device 11 includes a first heating tube 12 and a second heating tube 13 arranged in a cross shape inside the column body 1. The bottom of the first heating tube 12 and the second heating tube 13 are connected to a terminal block 14. A terminal block 15 is slidably disposed at the lower end of the terminal block 14. A terminal post 17 electrically connected to the terminal block 14 is disposed inside the terminal block 15.
[0029] In this embodiment, the mounting base 2 includes a cylindrical body 9 nested on the lower outer wall of the tower body 1. A first flange 10 is fixedly installed at the lower end of the cylindrical body 9, and the lower end of the first flange 10 is symmetrically arranged with the upper end of the base 3.
[0030] In this embodiment, the base 3 includes a second flange 18 that is connected to the first flange 10. The lower end of the second flange 18 is provided with a rectangular support column 19. The lower end of the support column 19 is also provided with a third flange 20. The lower end of the third flange 20 is provided with a support leg 21 corresponding to the support column 19. The support column 19 is inclined inward between the second flange 18 and the support leg 21.
[0031] In this embodiment, the heating device 11 includes a circular connecting ring disposed outside the discharge pipe 16 at the bottom of the tower body 1. A terminal block 15 slides on the connecting ring, and a terminal post 17 is disposed inside the terminal block 15. The terminal post 17 is electrically connected to the terminal block 14 inside the connecting ring. The upper end of the terminal block 14 is also connected to a heating tube disposed at the bottom of the tower body 1. The heating tube includes a first heating tube 12 and a second heating tube 13. The first heating tube 12 is disposed facing forward at the bottom of the tower body 1, and the second heating tube 13 is disposed laterally at the bottom of the tower body 1. Both the first heating tube 12 and the second heating tube 13 are made of Hastelloy alloy material. With its good thermal conductivity, the Hastelloy heating tube can more effectively transfer heat to the heated medium, achieve a higher heat exchange effect, improve energy utilization efficiency, reduce energy consumption, and maintain stable performance in strong acid, strong alkali, high temperature and high pressure environments. It is also not easily corroded and damaged, ensuring the service life and performance of the heating tube.
[0032] Working principle: During use, the wiring board 15 installed at the bottom of the heating device 11 of the tower body 1 connects to the wires through the terminals 17 inside the wiring board 15. The wires connected to the terminals 14 of the terminals 17 energize the heating wires inside the first heating tube 12 and the second heating tube 13, providing heat to vaporize the liquid in the tower body 1. The generated steam flows upward and is connected to the condenser through the exhaust pipe 4, where it is converted into liquid. At the same time, the steam flows through multiple return pipes 5, with the ends away from the tower body 1 converging and connecting to the cooler. The upper end of the cooler is connected to the condenser, so that the steam rising in the tower body 1 first flows through the condenser, and then the condensed dilute acetic acid solution flows into the cooler as product. The other part flows back into the tower body 1 as return liquid through the return pipes 5. Finally, the wastewater is discharged through the discharge pipe 16.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.
[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An acetate recovery distillation column equipped with a heating device, characterized in that: The tower includes an acetate recovery tower body (1), a mounting base (2) located at the bottom of the tower body (1), and a base (3) connected to the mounting base (2). A heating device (11) is provided at the bottom of the tower body (1) through the mounting base (2). The heating device (11) includes a first heating tube (12) and a second heating tube (13) arranged in a cross shape inside the tower body (1). The bottom of the first heating tube (12) and the second heating tube (13) are connected to terminals (14). A terminal block (15) is slidably provided at the lower end of the terminal block (14). A terminal post (17) electrically connected to the terminal block (14) is provided inside the terminal block (15).
2. The acetate recovery distillation column with a heating device according to claim 1, characterized in that: The tower body (1) includes an exhaust pipe (4) connected to the condenser at the top, a return pipe (5) connected to the cooler at the side, and a discharge pipe (16) at the bottom.
3. The acetate recovery distillation column with a heating device according to claim 2, characterized in that: A pressure sensor (6) is provided on the right side of the top of the tower body (1) near the exhaust pipe (4), a liquid level sensor (7) is provided on the left side of the top of the tower body (1) near the exhaust pipe (4), and a temperature sensor (8) is also provided on the side of the tower body (1) at the symmetrical end of the return pipe (5).
4. The acetate recovery distillation column with a heating device according to claim 2, characterized in that: Three return pipes (5) are provided on the side of the tower body (1). The three return pipes (5) converge at the ends away from the tower body (1) and then connect to the cooler.
5. The acetate recovery distillation column with a heating device according to claim 3, characterized in that: The pressure sensor (6), liquid level sensor (7) and temperature sensor (8) are all made of acid-resistant materials.
6. The acetate recovery distillation column with a heating device according to claim 1, characterized in that: The inner wall of the tower body (1) is made of enamel material, and the first heating tube (12) and the second heating tube (13) are both made of Hastelloy material.
7. The acetate recovery distillation column with a heating device according to claim 1, characterized in that: The mounting base (2) includes a cylinder (9) nested on the lower outer wall of the tower body (1), and a first flange (10) is fixedly provided at the lower end of the cylinder (9).
8. The acetate recovery distillation column with a heating device according to claim 7, characterized in that: The base (3) includes a second flange (18) that is connected to the first flange (10), and the lower end of the second flange (18) is provided with a rectangular support column (19).
9. The acetate recovery distillation column with a heating device according to claim 8, characterized in that: The lower end of the support column (19) is also provided with a third flange (20), and the lower end of the third flange (20) is provided with a support leg (21) corresponding to the support column (19).
10. The acetate recovery distillation column with a heating device according to claim 9, characterized in that: The support column (19) is inclined inward between the second flange (18) and the support leg (21).