Intelligent rectification system for thionyl chloride production

Abstract

The utility model discloses an intelligent rectification system for thionyl chloride production, which relates to the technical field of thionyl chloride production and comprises a rectification tower, the rectification tower is connected with a feeding tank, a condenser, a reflux tank and a reboiler, and control valve groups are arranged on the rectification tower, the feeding tank, the condenser, the reflux tank and the reboiler. Liquid level monitoring assemblies and flow monitoring assemblies are arranged on the rectifying tower, the feeding tank and the return tank, temperature monitoring assemblies are arranged on the rectifying tower, the condenser and the reboiler, and pressure monitoring assemblies are arranged on the rectifying tower and the reboiler; the control valve set, the liquid level monitoring assembly, the flow monitoring assembly, the temperature monitoring assembly and the pressure monitoring assembly are all electrically connected with an advanced process control system. The intelligent rectification system for thionyl chloride production can solve the problems that an existing rectification system is low in automatic control rate, unstable in parameter, poor in separation effect and high in energy consumption.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of thionyl chloride production technology, specifically to a thionyl chloride production intelligent rectification system. BACKGROUND

[0002] Rectification is a key link in the thionyl chloride production process, and its separation effect and running stability will affect the quality and yield of the product. However, the automatic control rate of most rectification systems is low at present, and in the actual production process, employees need to frequently control the opening of the valve, adjust the parameters such as feed quantity, reflux quantity, tower kettle discharge quantity and tower top discharge quantity. This control method not only has high labor intensity, but also is easily affected by human factors, resulting in unstable parameters. The fluctuation of temperature, pressure and flow will affect the separation effect of the material in the rectification process, thereby affecting the rectification effect and increasing energy consumption. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a thionyl chloride production intelligent rectification system, which aims to solve the problems of low automatic control rate, unstable parameters, poor separation effect and high energy consumption of the existing rectification system.

[0004] The above-mentioned optimization structure of the utility model is realized by the following technical scheme: a thionyl chloride production intelligent rectification system, comprising a rectification tower, the rectification tower is connected with a feed tank, a condenser, a reflux tank and a reboiler;

[0005] Control valve groups are arranged on the rectification tower, the feed tank, the condenser, the reflux tank and the reboiler;

[0006] Liquid level monitoring assemblies and flow monitoring assemblies are arranged on the rectification tower, the feed tank and the reflux tank;

[0007] Temperature monitoring assemblies are arranged on the rectification tower, the condenser and the reboiler;

[0008] Pressure monitoring assemblies are arranged on the rectification tower and the reboiler;

[0009] The control valve groups, the liquid level monitoring assemblies, the flow monitoring assemblies, the temperature monitoring assemblies and the pressure monitoring assemblies are all electrically connected with an advanced process control system.

[0010] In some embodiments, the control valve group includes a feed regulating valve, a reflux regulating valve, a bottom discharge regulating valve, a top discharge regulating valve, a circulating water regulating valve, and a steam regulating valve. The feed regulating valve is located between the feed tank and the distillation column. The reflux regulating valve is located between the reflux tank and the top feed inlet of the distillation column. The bottom discharge regulating valve is located at the bottom discharge outlet of the distillation column. The top discharge regulating valve is located at the top discharge outlet of the distillation column. The circulating water regulating valve is located at the return water inlet of the condenser. The steam regulating valve is located at the steam inlet of the reboiler.

[0011] In some embodiments, the level monitoring component includes a feed tank level sensor, a distillation column level sensor, and a reflux tank level sensor. The feed tank level sensor is disposed on the feed tank, the distillation column level sensor is disposed on the distillation column, and the reflux tank level sensor is disposed on the reflux tank.

[0012] In some embodiments, the flow monitoring component includes a feed flow meter, a reflux flow meter, a bottom discharge flow meter, and a top discharge flow meter. The feed flow meter is located between the feed tank and the feed regulating valve. The reflux flow meter is located between the reflux tank and the reflux regulating valve. The bottom discharge flow meter is located between the bottom outlet of the distillation column and the bottom discharge regulating valve. The top discharge flow meter is located between the top outlet of the distillation column and the top discharge regulating valve.

[0013] In some embodiments, the temperature monitoring component includes a bottom temperature detector, a top temperature detector, a circulating water temperature detector, and a steam temperature detector. The bottom temperature detector is located at the bottom of the distillation column, the top temperature detector is located at the top of the distillation column, the circulating water temperature detector is located at the water inlet of the condenser, and the steam temperature detector is located at the air inlet of the reboiler.

[0014] In some embodiments, a conveying assembly is further included, the conveying assembly including a feed pump, a reflux pump, and a bottom discharge pump, the feed pump being disposed between the feed tank and the feed flow meter, the reflux pump being disposed between the reflux tank and the reflux flow meter, and the bottom discharge pump being disposed between the distillation column and the bottom discharge flow meter.

[0015] In some embodiments, a cooling tank is further included, which is disposed between the distillation column and the condenser; the cooling tank is provided with a spiral flow channel, the top of the spiral flow channel is connected to the distillation column, the bottom of the spiral flow channel is connected to the condenser, and a plurality of heat dissipation outer rings are provided on the outer wall of the cooling tank at equal intervals.

[0016] In some embodiments, the cooling tank is coaxially provided with heat dissipation holes, and a plurality of heat dissipation inner rings are provided at equal intervals on the inner wall of the heat dissipation holes.

[0017] In some embodiments, the pressure monitoring assembly includes a distillation column pressure sensor and a reboiler pressure sensor, wherein the distillation column pressure sensor is disposed on the distillation column and the reboiler pressure sensor is disposed on the reboiler.

[0018] In summary, this utility model has the following beneficial effects:

[0019] This invention establishes an advanced process control system electrically connected to a control valve assembly, a level monitoring component, a flow monitoring component, and a temperature monitoring component. The advanced process control system receives real-time feedback from the level, flow, temperature, and pressure parameters from these components. Based on a preset control strategy, it precisely adjusts the control valve assembly to achieve automated control of the distillation process. This improves the automation rate, reduces the impact of human factors on system parameters, and thus stabilizes the distillation system parameters, enhancing the separation effect and ensuring product quality.

[0020] This invention enables intelligent temperature control of the condenser and reboiler based on the feedback values ​​from the temperature monitoring component. It can dynamically adjust the flow rate of cooling water and steam according to the real-time temperature, avoiding overcooling and overheating, thereby reducing the flow rate of circulating water and steam, reducing unnecessary energy consumption, and improving energy utilization efficiency. Attached Figure Description

[0021] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0022] Fig. 2 This is a cross-sectional view of the cooling tank of this utility model.

[0023] In the diagram: 1. Distillation column; 2. Feed tank; 3. Condenser; 4. Reflux tank; 5. Reboiler; 6. Advanced process control system; 7. Feed regulating valve; 8. Reflux regulating valve; 9. Bottom outlet regulating valve; 10. Top outlet regulating valve; 11. Circulating water regulating valve; 12. Steam regulating valve; 13. Feed tank level sensor; 14. Distillation column level sensor; 15. Reflux tank level sensor; 16. Feed flow meter; 17. Reflux flow meter; 8. Bottom feed flow meter; 19. Top feed flow meter; 20. Bottom temperature sensor; 21. Top temperature sensor; 22. Circulating water temperature sensor; 23. Steam temperature sensor; 24. Feed pump; 25. Reflux pump; 26. Bottom feed pump; 27. Distillation column pressure sensor; 28. Cooling tank; 281. Spiral flow channel; 282. Outer heat dissipation ring; 283. Heat dissipation holes; 284. Inner heat dissipation ring; 29. ​​Reboiler pressure sensor. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] refer to Figs. 1-2 An intelligent distillation system for thionyl chloride production includes a distillation column 1. Within the distillation column 1, gas-liquid mass and heat transfer occur, achieving the separation and purification of thionyl chloride. The distillation column 1 is connected to a feed tank 2, a condenser 3, a reflux tank 4, and a reboiler 5. The feed tank 2 stores the material to be distilled and is transported to the distillation column 1 via a pipeline. The condenser 3, installed at the top of the distillation column 1, condenses gaseous thionyl chloride into a liquid state. The reflux tank 4, connected to the condenser 3, collects the condensed liquid and connects it to the top of the distillation column 1 via a reflux pipe for reflux operation. The reboiler 5, installed at the bottom of the distillation column 1, heats and vaporizes the liquid phase in the column bottom, providing rising steam for the distillation process. Control valve assemblies are installed on the distillation column 1, feed tank 2, condenser 3, reflux tank 4, and reboiler 5 to control the flow of materials and energy within the distillation system. Liquid level monitoring components are installed on the distillation column 1, feed tank 2, condenser 3, reflux tank 4, and reboiler 5. The system includes flow monitoring components and level monitoring components to monitor the liquid level in each device in real time, as well as the flow rate of the material flowing out of each device. Temperature monitoring components are installed on distillation column 1, condenser 3, and reboiler 5 to monitor the temperature at key locations. Pressure monitoring components are installed on distillation column 1 and reboiler 5 to monitor the pressure in these two units in real time. The control valve group, level monitoring components, flow monitoring components, temperature monitoring components, and pressure monitoring components are all electrically connected to the advanced process control system 6, which can be connected wirelessly. The advanced process control system 6 is the core of the entire intelligent distillation system. It receives real-time data from each monitoring component and precisely controls the control valve group according to a preset control strategy. This enables automatic adjustment of parameters such as feed rate, reflux rate, bottom feed rate, and top feed rate, avoiding parameter fluctuations caused by human factors, thus ensuring distillation efficiency and reducing energy consumption. For example, when the reboiler temperature sensor 20 detects that the reboiler temperature is lower than the set value, the advanced process control system 6 will automatically increase the opening of the steam regulating valve 12 to increase the heating capacity of the reboiler 5, thus restoring the reboiler temperature to the set value. When the feed tank level sensor 13 detects that the liquid level in the feed tank 2 is too low, the advanced process control system 6 will issue an alarm to remind the operator to replenish the material in time. The specific structure and control logic of the advanced process control system 6 are existing technologies and will not be described in detail here.

[0026] In some embodiments, the control valve assembly includes a feed regulating valve 7, a reflux regulating valve 8, a bottom discharge regulating valve 9, a top discharge regulating valve 10, a circulating water regulating valve 11, and a steam regulating valve 12. The feed regulating valve 7 is located between the feed tank 2 and the distillation column 1. By controlling the opening of the feed regulating valve 7, the feed rate can be precisely controlled to ensure material balance within the distillation column 1. The reflux regulating valve 8 is located between the reflux tank 4 and the top feed inlet of the distillation column 1. It can regulate the liquid flow rate refluxed to the top of the distillation column 1 to maintain gas-liquid balance within the distillation column 1 and ensure separation efficiency. The bottom discharge regulating valve 9 is located at the bottom discharge outlet of the distillation column 1. By adjusting the bottom discharge... The opening degree of the feed regulating valve 9 can control the liquid level in the column bottom and the discharge rate of the product. The top discharge regulating valve 10 is located at the top discharge port of the distillation column 1 and can regulate the flow rate of the material discharged from the top of the distillation column 1, thereby ensuring the yield and quality of the top product. The circulating water regulating valve 11 is located at the return water port of the condenser 3. By controlling the flow rate of the circulating water, the cooling effect of the condenser 3 can be precisely controlled, thereby ensuring the condensation effect of the gaseous material at the top of the column. The steam regulating valve 12 is located at the steam inlet of the reboiler 5 and can regulate the steam flow rate entering the reboiler 5, thereby ensuring that the reboiler 5 heats the material in the column bottom to a suitable temperature and provides sufficient rising steam for the distillation process.

[0027] In some embodiments, the level monitoring component includes a feed tank level sensor 13, a distillation column level sensor 14, and a reflux tank level sensor 15. The feed tank level sensor 13 is installed on the feed tank 2 and can monitor the liquid level in the feed tank 2 in real time, so as to understand the storage status of the material in the feed tank 2 in a timely manner and replenish the material in a timely manner. The distillation column level sensor 14 is installed on the distillation column 1 and can monitor the liquid level in the distillation column 1 to ensure the normal operation of the distillation process and avoid the liquid level being too high or too low, which would affect the distillation effect. The reflux tank level sensor 15 is installed on the reflux tank 4 and can monitor the liquid level in the reflux tank 4, thereby ensuring a stable supply of reflux liquid and maintaining the gas-liquid balance in the distillation column 1.

[0028] In some embodiments, the flow monitoring component includes a feed flow meter 16, a reflux flow meter 17, a bottom flow meter 18, and a top flow meter 19. The feed flow meter 16 is located between the feed tank 2 and the feed regulating valve 7, and can monitor the material flow rate entering the distillation column 1 in real time. Based on the feedback from the feed flow meter 16, the advanced process control system 6 can precisely control the opening of the feed regulating valve 7 to achieve precise control of the feed flow rate. The reflux flow meter 17 is located between the reflux tank 4 and the reflux regulating valve 8, and can monitor the liquid flow rate refluxed to the top of the distillation column 1. Based on the feedback from the reflux flow meter 17, the advanced process control system 6 can adjust the opening of the reflux regulating valve 8 to ensure... A suitable reflux flow rate is achieved by installing a bottom discharge flow meter 18 between the bottom discharge port of distillation column 1 and the bottom discharge regulating valve 9. This flow meter monitors the flow rate of material discharged from the bottom of distillation column 1. Based on the feedback from the bottom discharge flow meter 18, the advanced process control system 6 can control the opening degree of the bottom discharge regulating valve 9 to ensure the stability of the liquid level in distillation column 1 and the discharge rate of the product. Similarly, a top discharge flow meter 19 is installed between the top discharge port of distillation column 1 and the top discharge regulating valve 10. This flow meter monitors the flow rate of material discharged from the top of distillation column 1. Based on the feedback from the top discharge flow meter 19, the advanced process control system 6 can adjust the opening degree of the top discharge regulating valve 10, thereby controlling the yield and quality of the top product.

[0029] In some embodiments, the temperature monitoring components include a reboiler temperature sensor 20, a top temperature sensor 21, a circulating water temperature sensor 22, and a steam temperature sensor 23. The reboiler temperature sensor 20 is located at the bottom of the distillation column 1 and can monitor the temperature of the reboiler in real time. Based on feedback from the reboiler temperature sensor 20, the advanced process control system 6 can adjust the opening of the steam regulating valve 12 to control the heating amount of the reboiler 5, thereby maintaining a stable reboiler temperature. The top temperature sensor 21 is located at the top of the distillation column 1 and can monitor the temperature at the top of the distillation column 1. Based on feedback from the top temperature sensor 21, the advanced process control system 6 can adjust the circulating water temperature sensor 22 and the steam temperature sensor 23. The opening degree of the water regulating valve 11 controls the cooling effect of the condenser 3 and maintains the stability of the tower top temperature. The circulating water temperature detector 22 is located at the inlet of the condenser 3 and can monitor the temperature of the circulating water entering the condenser 3. Through the feedback of the circulating water temperature detector 22, the advanced process control system 6 can more accurately adjust the opening degree of the circulating water regulating valve 11 to ensure the cooling effect of the condenser 3. The steam temperature detector 23 is located at the inlet of the reboiler 5 and can monitor the temperature of the steam entering the reboiler 5. Through the feedback of the steam temperature detector 23, the advanced process control system 6 can adjust the opening degree of the steam regulating valve 12 to ensure the stability of the heating capacity of the reboiler 5.

[0030] In some embodiments, a conveying assembly is also included, comprising a feed pump 24, a reflux pump 25, and a bottom discharge pump 26. The feed pump 24 is located between the feed tank 2 and the feed flow meter 16, and provides power to ensure that the material enters the distillation column 1 at a stable flow rate. The reflux pump 25 is located between the reflux tank 4 and the reflux flow meter 17, and can convey the liquid in the reflux tank 4 to the top of the distillation column 1 to maintain the gas-liquid balance in the distillation column 1. The bottom discharge pump 26 is located between the distillation column 1 and the bottom discharge flow meter 18, and can discharge the material from the bottom of the distillation column 1, convey the bottom product to the subsequent processing steps, and control the bottom liquid level.

[0031] In some embodiments, a cooling tank 28 is also included. The cooling tank 28 is disposed between the distillation column 1 and the condenser 3. The cooling tank 28 can achieve preliminary cooling of the vapor flowing out of the distillation column 1, thereby reducing the temperature of the product flowing into the condenser 3, and thus reducing the temperature difference between the cooling water and the product in the condenser 3, reducing damage to the condenser 3, extending the service life of the condenser 3, and at the same time increasing the temperature of the cooling water required by the condenser 3, reducing energy consumption and saving resources. The cooling tank 28 is provided with a spiral flow channel 281. The top of the spiral flow channel 281 is connected to the distillation column 1, and the bottom of the spiral flow channel 281 is connected to the condenser 3. The spiral flow channel 281 can increase the residence time of the product in the cooling tank 28 and improve the cooling effect of the cooling tank 28. Multiple heat dissipation outer rings 282 are provided on the outside of the cooling tank 28. The multiple heat dissipation outer rings 282 are equally spaced on the outer wall of the cooling tank 28. The heat dissipation outer rings 282 can increase the heat dissipation area of ​​the cooling tank 28 and further improve the cooling efficiency.

[0032] In some embodiments, the cooling tank 28 is coaxially provided with heat dissipation holes 283, and a plurality of heat dissipation inner rings 284 are provided at equal intervals on the inner wall of the heat dissipation holes 283. The arrangement of heat dissipation holes 283 and heat dissipation inner rings 284 can further reduce the contact area between the product inside the cooling tank 28 and the outside world, increase the heat dissipation area, thereby enhancing the heat dissipation effect of the cooling tank 28, reducing the temperature of the material entering the condenser 3, and reducing the burden on the condenser 3.

[0033] In some embodiments, the pressure monitoring components include a distillation column pressure sensor 27 and a reboiler pressure sensor 29. The distillation column pressure sensor 27 is located on the distillation column 1 and monitors pressure changes within the distillation column 1, providing important parameters for the stable control of the distillation process. When the pressure within the distillation column 1 is too high, the advanced process control system 6 will adjust the circulating water regulating valve 11 and the steam regulating valve 12 to increase the cooling capacity of the condenser 3 and decrease the heating capacity of the reboiler 5, thereby reducing the pressure. When the pressure is too low, the advanced process control system 6 will take the opposite action to increase the pressure. The reboiler pressure sensor 29 is located on the reboiler 5 and monitors the pressure within the reboiler 5. By adjusting the opening of the steam regulating valve 12, it ensures the safe and stable operation of the reboiler 5.

[0034] The specific working principle is as follows:

[0035] The feed pump 24 is started, and the feed regulating valve 7 is opened to transport the material in the feed tank 2 to the distillation column 1. The feed flow meter 16 monitors the feed flow rate in real time and feeds the data back to the advanced process control system 6. The advanced process control system 6 adjusts the opening of the feed regulating valve 7 according to the preset feed rate to stabilize the feed flow rate at the set value. At the same time, the reboiler 5 is started, and the steam regulating valve 12 is opened to introduce steam into the reboiler 5 to heat the material in the bottom of the distillation column 1. The steam temperature detector 23 monitors the temperature of the steam entering the reboiler 5 in real time, the bottom temperature detector 20 monitors the bottom temperature, and the reboiler pressure sensor 29 monitors the pressure inside the reboiler. The advanced process control system 6 adjusts the opening of the steam regulating valve 12 according to these temperature data to gradually increase the bottom temperature and the pressure of the reboiler 5 to the set values. As the material in the bottom of the column is heated and vaporized, the rising steam undergoes mass and heat transfer with the descending liquid in the distillation column 1.

[0036] When gaseous material is discharged from the top of distillation column 1, condenser 3 is started, and circulating water regulating valve 11 is opened to introduce circulating water into condenser 3. Circulating water temperature detector 22 monitors the temperature of the circulating water entering condenser 3 in real time, and column top temperature detector 21 monitors the column top temperature. The advanced process control system 6 adjusts the opening of circulating water regulating valve 11 based on these temperature data to ensure that the gaseous material at the top of the column is fully cooled in condenser 3 and condensed into a liquid phase.

[0037] The condensed liquid material flows into the reflux tank 4. When the liquid level in the reflux tank 4 reaches a certain height, the reflux pump 25 is started, and the reflux regulating valve 8 is opened to return a portion of the liquid in the reflux tank 4 to the top of the distillation column 1. The reflux flow meter 17 monitors the reflux flow rate in real time and feeds the data back to the advanced process control system 6. The advanced process control system 6 adjusts the opening of the reflux regulating valve 8 according to the operating conditions of the distillation column to control the reflux ratio and maintain the gas-liquid balance in the distillation column.

[0038] During system operation, each monitoring component continuously collects data and transmits it to the advanced process control system 6. The advanced process control system 6 adjusts the opening degree of each control valve group in real time according to the preset control strategy to ensure stable system operation.

[0039] The circulating water temperature sensor 22 and the steam temperature sensor 23 monitor the temperature of the circulating water entering the condenser 3 and the temperature of the steam entering the reboiler 5, respectively. Based on this temperature data, the advanced process control system 6 fine-tunes the flow rates of the circulating water and steam to improve the accuracy of temperature control.

[0040] When it is necessary to stop the system operation, first close the feed pump 24 and the feed regulating valve 7 to stop feeding into the distillation column 1. Then gradually reduce the opening of the steam regulating valve 12 to reduce the heating capacity of the reboiler 5, so that the temperature of the column bottom gradually decreases. As the temperature of the column bottom decreases, the amount of material vaporization in the distillation column 1 decreases, and the amount of gaseous material discharged from the top of the column also decreases accordingly.

[0041] When the amount of gaseous material discharged from the top of the tower decreases significantly, close the circulating water regulating valve 11 to stop the flow of circulating water into the condenser 3. At this time, the condenser 3 stops working, and no more liquid material flows into the return tank 4.

[0042] Next, shut off the reflux pump 25 and reflux regulating valve 8 to stop the reflux operation. Finally, open the reboiler discharge regulating valve 9 to discharge all remaining material from the reboiler of distillation column 1. Throughout the shutdown process, the advanced process control system 6 will adjust the opening of each control valve group in real time based on the data collected by each monitoring component to ensure a safe and smooth system shutdown.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An intelligent distillation system for the production of thionyl chloride, characterized in that: It includes a distillation column (1), which is connected to a feed tank (2), a condenser (3), a reflux tank (4), and a reboiler (5); The distillation column (1), the feed tank (2), the condenser (3), the reflux tank (4), and the reboiler (5) are equipped with control valve groups; The distillation column (1), the feed tank (2), and the reflux tank (4) are equipped with a liquid level monitoring component and a flow rate monitoring component; Temperature monitoring components are provided on the distillation column (1), the condenser (3), and the reboiler (5); Pressure monitoring components are provided on the distillation column (1) and the reboiler (5); The control valve group, the liquid level monitoring component, the flow monitoring component, the temperature monitoring component, and the pressure monitoring component are all electrically connected to an advanced process control system (6).

2. The intelligent distillation system for producing thionyl chloride according to claim 1, characterized in that: The control valve group includes a feed regulating valve (7), a reflux regulating valve (8), a column bottom discharge regulating valve (9), a column top discharge regulating valve (10), a circulating water regulating valve (11), and a steam regulating valve (12). The feed regulating valve (7) is located between the feed tank (2) and the distillation column (1). The reflux regulating valve (8) is located between the reflux tank (4) and the top feed port of the distillation column (1). The column bottom discharge regulating valve (9) is located at the bottom discharge port of the distillation column (1). The column top discharge regulating valve (10) is located at the top discharge port of the distillation column (1). The circulating water regulating valve (11) is located at the return water port of the condenser (3). The steam regulating valve (12) is located at the steam inlet of the reboiler (5).

3. The intelligent distillation system for producing thionyl chloride according to claim 1, characterized in that: The liquid level monitoring component includes a feed tank liquid level sensor (13), a distillation column liquid level sensor (14), and a reflux tank liquid level sensor (15). The feed tank liquid level sensor (13) is located on the feed tank (2), the distillation column liquid level sensor (14) is located on the distillation column (1), and the reflux tank liquid level sensor (15) is located on the reflux tank (4).

4. The intelligent distillation system for producing thionyl chloride according to claim 2, characterized in that: The flow monitoring components include a feed flow meter (16), a reflux flow meter (17), a bottom flow meter (18), and a top flow meter (19). The feed flow meter (16) is located between the feed tank (2) and the feed regulating valve (7). The reflux flow meter (17) is located between the reflux tank (4) and the reflux regulating valve (8). The bottom flow meter (18) is located between the bottom outlet of the distillation column (1) and the bottom flow regulating valve (9). The top flow meter (19) is located between the top outlet of the distillation column (1) and the top flow regulating valve (10).

5. The intelligent distillation system for producing thionyl chloride according to claim 1, characterized in that: The temperature monitoring components include a bottom temperature detector (20), a top temperature detector (21), a circulating water temperature detector (22), and a steam temperature detector (23). The bottom temperature detector (20) is located at the bottom of the distillation column (1), the top temperature detector (21) is located at the top of the distillation column (1), the circulating water temperature detector (22) is located at the water inlet of the condenser (3), and the steam temperature detector (23) is located at the air inlet of the reboiler (5).

6. The intelligent distillation system for producing thionyl chloride according to claim 4, characterized in that: It also includes a conveying assembly, which includes a feed pump (24), a reflux pump (25), and a bottom discharge pump (26). The feed pump (24) is located between the feed tank (2) and the feed flow meter (16). The reflux pump (25) is located between the reflux tank (4) and the reflux flow meter (17). The bottom discharge pump (26) is located between the distillation column (1) and the bottom discharge flow meter (18).

7. The intelligent distillation system for producing thionyl chloride according to claim 1, characterized in that: It also includes a cooling tank (28), which is located between the distillation column (1) and the condenser (3); the cooling tank (28) is provided with a spiral flow channel (281), the top of the spiral flow channel (281) is connected to the distillation column (1), the bottom of the spiral flow channel (281) is connected to the condenser (3), and a plurality of heat dissipation outer rings (282) are provided outside the cooling tank (28), and the plurality of heat dissipation outer rings (282) are equally spaced on the outer wall of the cooling tank (28).

8. The intelligent distillation system for producing thionyl chloride according to claim 7, characterized in that: The cooling tank (28) is provided with heat dissipation holes (283) on the same axis, and multiple heat dissipation inner rings (284) are provided at equal intervals on the inner wall of the heat dissipation holes (283).

9. The intelligent distillation system for producing thionyl chloride according to claim 1, characterized in that: The pressure monitoring assembly includes a distillation column pressure sensor (27) and a reboiler pressure sensor (29). The distillation column pressure sensor (27) is located on the distillation column (1), and the reboiler pressure sensor (29) is located on the reboiler (5).

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