Dividing wall column for homologous alcohol separation

Abstract

The utility model discloses a dividing wall column for separating homologous alcohol, and relates to the technical field of chemical equipment. The dividing wall column for homologous alcohol separation comprises a dividing wall column body, the outer surface of the dividing wall column body is fixedly connected with an inner layer shell and an outer layer shell, a heating cavity is formed in the interval position of the dividing wall column body and the inner layer shell, a heat preservation cavity is formed in the interval position of the inner layer shell and the outer layer shell, the inner wall of the heating cavity is fixedly connected with a flow guide plate, and the flow guide plate is fixedly connected with the outer wall of the dividing wall column body. According to the utility model, the dividing wall column is convenient to work in a high-temperature or low-temperature environment, and the influence of the external environment temperature on the dividing wall column is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically a partition tower for the separation of homologous alcohols. Background Technology

[0002] Divided-wall column is a highly efficient distillation column design optimized for the separation of multi-component mixtures. In the separation of homologous alcohols (such as methanol, ethanol, propanol, etc., which have similar structures but similar boiling points), the divided-wall column can simultaneously separate light components (such as ethanol) from intermediate components (such as propanol) and intermediate components from heavy components (such as butanol).

[0003] According to patent CN201710785636.5, a device for producing methanol using a combination of partitioned-wall column multi-effect distillation belongs to the field of chemical production equipment technology. This device includes: a first distillation column, a second distillation column, and a third distillation column; the first distillation column is equipped with vertical partitions, dividing it into a feed side and a discharge side; methanol feedstock enters the feed side of the first distillation column, with light components collected at the top, the first methanol product collected at the discharge side, and the first crude methanol collected at the bottom, which enters the second distillation column; the second methanol product is collected at the top of the second distillation column, and the second crude methanol is collected at the bottom, which enters the third distillation column; the third methanol product is collected at the top of the third distillation column, wastewater is collected at the bottom, and fusel oil is collected via a side stream. The entire process uses only one reboiler with external steam, achieving energy savings of over 35% compared to a conventional three-tower double-effect process.

[0004] However, during operation, the adjacent tower is susceptible to external temperature disturbances, leading to internal temperature fluctuations that affect separation efficiency and product purity. In particular, under low-temperature conditions, the tower loses a significant amount of heat, impacting the working efficiency of the adjacent tower. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a partitioned column for the separation of homologous alcohols, thereby resolving the existing problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a partitioned column for separating homologous alcohols, comprising a partitioned column body, an inner shell and an outer shell fixedly connected to the outer surface of the partitioned column body, a heating chamber provided at the interval between the partitioned column body and the inner shell, a heat preservation chamber provided at the interval between the inner shell and the outer shell, a guide plate fixedly connected to the inner wall of the heating chamber, a steam pipe fixedly connected inside the guide plate, a reflux pipe fixedly connected to the bottom of the guide plate, a heating furnace provided at the end of the steam pipe, and a heater provided at the bottom of the heating furnace.

[0007] Preferably, the outer surfaces of the steam pipe and the return pipe penetrate the inner shell and the outer shell and extend to the outside, and the interior of the heating chamber is connected to the interior of the heating furnace through the steam pipe.

[0008] Preferably, the inner wall of the heating chamber is provided with a temperature sensor and a pressure sensor, and a pressure relief pipe is fixedly connected to the inner wall of the heating chamber, with a pressure relief valve installed inside the pressure relief pipe.

[0009] Preferably, the inner wall of the insulation cavity is fixedly connected to an air injection pipe and an air exhaust pipe, and both the air injection pipe and the air exhaust pipe are equipped with a one-way valve.

[0010] Preferably, the interior of the partition tower body is provided with a partition, a gas phase distributor and a liquid phase distributor, and the top of the partition tower body is provided with a condenser connecting pipe.

[0011] Preferably, the outer surface of the partition tower body is provided with a reboiler connecting pipe, the outer surface of which penetrates the inner shell and the outer shell and extends to the outside.

[0012] Beneficial effects

[0013] This invention provides a partitioned column for the separation of homologous alcohols. It has the following beneficial effects:

[0014] (1) The partition tower for homologous alcohol separation is equipped with a steam pipe in the heating chamber, which facilitates the introduction of high-temperature steam generated in the heating furnace into the heating chamber, thereby achieving heating of the partition tower body and making it convenient for the partition tower to work in a low-temperature environment.

[0015] (2) The partition tower for homologous alcohol separation forms a stable heat insulation layer by injecting inert gas into the insulation cavity, which effectively reduces the heat exchange between the tower body and the environment, ensures the uniformity of internal temperature, and thus improves the purity and efficiency of homologous alcohol separation. It also facilitates the operation of the partition tower in high or low temperature environments and reduces the influence of external ambient temperature on the partition tower. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is an enlarged structural schematic diagram of A of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the heating furnace of this utility model.

[0020] In the diagram: 1. Main body of the partition tower; 2. Baffle plate; 3. Gas phase distributor; 4. Liquid phase distributor; 5. Reboiler connecting pipe; 6. Condenser connecting pipe; 7. Inner shell; 8. Outer shell; 9. Insulation chamber; 10. Gas injection pipe; 11. Exhaust pipe; 12. One-way valve; 13. Heating chamber; 14. Baffle plate; 15. Steam pipe; 16. Reflux pipe; 17. Temperature sensor; 18. Gas pressure sensor; 19. Pressure relief pipe; 20. Pressure relief valve; 21. Heating furnace; 22. Heater. Detailed Implementation

[0021] 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.

[0022] Example 1:

[0023] like Figure 1-4 As shown, this utility model provides a partitioned column for the separation of homologous alcohols, including a partitioned column body 1. An inner shell 7 and an outer shell 8 are fixed to the outer surface of the partitioned column body 1 by welding. The cavity between the partitioned column body 1 and the inner shell 7 is a heating chamber 13, and the cavity between the inner shell 7 and the outer shell 8 is a heat preservation chamber 9. A guide plate 14 is fixed to the inner wall of the heating chamber 13 by welding. A steam pipe 15 is fixedly connected inside the guide plate 14. A return pipe 16 is fixedly connected to the bottom of the guide plate 14. A heater 21 is provided at the gas delivery end of the steam pipe 15. A heater 22 is provided at the bottom of the heater 21. The heater 22 is used to heat the heater 21. The heater 21 is filled with water. The steam generated after the water is heated and boiled enters the heating chamber 13 through the steam pipe 15.

[0024] Specifically, both the steam pipe 15 and the return pipe 16 are installed on the top of the heating furnace 21 through sealing flanges. The return pipe 16 is used to guide the condensate in the heating chamber 13 back into the heating furnace 21. The interior of the heating chamber 13 is connected to the interior of the heating furnace 21 through the steam pipe 15. A temperature sensor 17 and a pressure sensor 18 are installed on the inner wall of the heating chamber 13. A pressure relief pipe 19 is welded to the inner wall of the heating chamber 13. A pressure relief valve 20 is installed inside the pressure relief pipe 19. An air injection pipe 10 and an exhaust pipe 11 are welded to the inner wall of the insulation chamber 9. A one-way valve 12 is installed inside both the air injection pipe 10 and the exhaust pipe 11. The air injection pipe 10 is used to inject inert gas into the insulation chamber 9, and the exhaust pipe 11 is used to exhaust excess air from the insulation chamber 9.

[0025] Specifically, the interior of the main body 1 of the partition tower is equipped with a partition plate 2, a gas phase distributor 3, and a liquid phase distributor 4. The partition plate 2, the gas phase distributor 3, and the liquid phase distributor 4 are all part of the basic structure of the partition tower. A condenser connecting pipe 6 is installed at the top of the main body 1 of the partition tower, and the condenser is connected to the outside of the main body 1 of the partition tower through the condenser connecting pipe 6. A reboiler connecting pipe 5 is installed on the outer surface of the main body 1 of the partition tower, and the reboiler is connected to the outside of the main body 1 of the partition tower through the reboiler connecting pipe 5. The partition plate 2, the gas phase distributor 3, the liquid phase distributor 4, the condenser, and the reboiler are used together for the basic operation of the partition tower.

[0026] The working principle and beneficial effects of the above embodiments.

[0027] During operation, in a low-temperature environment, heater 22 heats the water in heater 21. The hot steam generated by the boiling water in heater 21 enters the heating chamber 13 through steam pipe 15, raising the temperature inside the heating chamber 13 and thus increasing the temperature of the adjacent tower body. This prevents the low temperature from being transferred to the interior of the adjacent tower body 1, affecting its working efficiency. The steam entering the heating chamber 13 comes into contact with the inner wall and produces condensate. The condensate flows along the inner wall and guide plate 14 into return pipe 16, and then flows back into heater 21 through return pipe 16, realizing the recycling of water. Temperature sensor 17 monitors the temperature inside heating chamber 13. When the temperature reaches the preset threshold, heating furnace 21 stops heating. Pressure sensor 18 monitors the pressure inside heating chamber 13 in real time. When the pressure exceeds the set threshold, pressure relief pipe 19 and pressure relief valve 20 work together to quickly release excess pressure. In high or low temperature environments, inert gas (such as nitrogen) is injected into insulation chamber 9 through gas injection pipe 10 to form a heat insulation layer and reduce heat exchange between the tower and the environment. Exhaust pipe 11 is used to regulate the gas pressure inside the chamber or to discharge residual gas to ensure stable insulation effect.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dividing wall column for homologous alcohol separation comprising a dividing wall column main body (1), characterized in that: The outer surface of the main body (1) of the partition tower is fixedly connected to an inner shell (7) and an outer shell (8). A heating chamber (13) is provided at the interval between the main body (1) and the inner shell (7). A heat preservation chamber (9) is provided at the interval between the inner shell (7) and the outer shell (8). A guide plate (14) is fixedly connected to the inner wall of the heating chamber (13). A steam pipe (15) is fixedly connected inside the guide plate (14). A return pipe (16) is fixedly connected to the bottom of the guide plate (14). A heating furnace (21) is provided at the end of the steam pipe (15). A heater (22) is provided at the bottom of the heating furnace (21).

2. A dividing wall column for the separation of homologous alcohols according to claim 1, characterized in that: The outer surfaces of the steam pipe (15) and the return pipe (16) penetrate the inner shell (7) and the outer shell (8) and extend to the outside. The interior of the heating chamber (13) is connected to the interior of the heating furnace (21) through the steam pipe (15).

3. A dividing wall column for homologous alcohol separation according to claim 1, characterized in that: The inner wall of the heating chamber (13) is provided with a temperature sensor (17) and a pressure sensor (18). A pressure relief pipe (19) is fixedly connected to the inner wall of the heating chamber (13), and a pressure relief valve (20) is provided inside the pressure relief pipe (19).

4. A dividing wall column for homologous alcohol separation according to claim 1, characterized in that: The inner wall of the insulation cavity (9) is fixedly connected to an air injection pipe (10) and an exhaust pipe (11), and a one-way valve (12) is provided inside the air injection pipe (10) and the exhaust pipe (11).

5. A dividing wall column for homologous alcohol separation according to claim 1, characterized in that: The interior of the partition tower body (1) is provided with a partition plate (2), a gas phase distributor (3) and a liquid phase distributor (4), and the top of the partition tower body (1) is provided with a condenser connecting pipe (6).

6. A dividing wall column for homologous alcohol separation according to claim 1, characterized in that: The outer surface of the main body (1) of the partition tower is provided with a reboiler connecting pipe (5), and the outer surface of the reboiler connecting pipe (5) penetrates the inner shell (7) and the outer shell (8) and extends to the outside.

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