On-line monitoring device for ethyl acetate rectification column side line

Abstract

The utility model discloses ethyl ester rectifying column side line production on -line monitoring device belongs to rectifying column monitoring technical field, including ethanol rectifying column body, the outer surface of ethanol rectifying column body is installed with second support plate, the upper surface of second support plate is installed with monitoring box, and the inside fixed column of monitoring box is installed with. The utility model discloses through the direct intercommunication of communication pipe and discharge pipe, can synchronous shunt sample to the collecting bucket when material discharges, and completes the on -the -spot rapid detection with the cooperation near infrared spectrum analyzer, has improved the real -time nature of monitoring significantly, and the application of near infrared spectrum technology has ensured the accuracy of component and purity analysis, effectively solved the pain point that traditional mode is difficult to grasp the component of production in real time, simultaneously, motor drives the rotation of support column, electric sliding rail realizes horizontal movement, electric lifting rod controls vertical lifting, and then cooperates electric telescopic rod drive dropper to complete liquid absorption and sample drop, and the whole process does not need manual operation, reduces manpower cost and time consumption.

Description

Technical Field

[0001] This utility model belongs to the field of distillation column monitoring technology, specifically, it relates to an online monitoring device for the side stream output of an ethyl ester distillation column. Background Technology

[0002] Ethyl ester distillation column is the core equipment for separating and purifying mixtures in ethyl ester production. It is specifically designed to separate ethyl ester, ethanol, water, and impurities. The main body is a vertical cylindrical column, internally filled with multiple trays or high-efficiency packing. A reboiler provides a heat source in the bottom, and a condenser at the top condenses the vapor. A side outlet is provided for extracting qualified product. During operation, the raw material mixture enters through the feed inlet in the middle of the column. Under the influence of the temperature gradient within the column, low-boiling-point components rise with the vapor, while high-boiling-point components sink with the liquid. Ethyl ester and ethanol, due to their similar boiling points (approximately 77°C and 78°C), require repeated mass transfer through dozens of trays. Separation: Heavy components in the vapor are condensed into the liquid phase, while light components in the liquid are vaporized into the gas phase, gradually increasing the purity of each layer. Low-boiling-point impurities (such as acetaldehyde) are enriched at the top of the column, and after condensation, part of them are refluxed to maintain equilibrium, while the remainder is treated as waste. Water and high-boiling-point residues accumulate in the bottom of the column and are periodically discharged to avoid accumulation. The side-stream outlet is located in the upper middle part, where the purity of ethyl ester can reach over 99%, allowing direct acquisition of products that meet production standards. This equipment achieves continuous and efficient separation through precise control of temperature, pressure, and reflux ratio, ensuring stable product quality while reducing energy consumption. It is a key device for the industrial production of ethyl ester.

[0003] Side-stream sampling is a key method for obtaining specific products or intermediates. The quality and flow rate of the sampled material directly affect the stability of the entire production process and the quality of the final product. However, the side-stream sampling process of ethyl ester distillation columns currently lacks effective online monitoring methods, making it difficult to accurately grasp the composition of the sampled material in real time. Traditional monitoring methods require sending samples to the laboratory for analysis, which is time-consuming and labor-intensive. Therefore, this utility model provides an online monitoring device for side-stream sampling of ethyl ester distillation columns to solve the above problems. Utility Model Content

[0004] The technical problem this utility model aims to solve is to overcome the shortcomings of existing technologies and provide an online monitoring device for the side stream of ethyl ester distillation column. To address the difficulties in accurately and in real-time monitoring of the composition of the sampled material in the side stream of ethyl ester distillation column, and the time-consuming and labor-intensive nature of traditional monitoring methods requiring laboratory analysis, the basic concept of this utility model is as follows: An online monitoring device for the side stream of an ethanol distillation column includes an ethanol distillation column body. A second support plate is installed on the outer surface of the ethanol distillation column body. A monitoring box is installed on the upper surface of the second support plate. A fixed column is installed inside the monitoring box. A motor is installed on the inner top wall of the fixed column. The output end of the motor passes through the fixed column and is installed on a support column. An electric slide rail is installed on the bottom surface of the support column. An electric lifting rod is slidably installed on the outer surface of the electric slide rail. A support frame is installed on the output end of the electric lifting rod. Two electric telescopic rods are installed on the inner wall of the support frame. A dropper is installed on the output end of the two electric telescopic rods. A collection bucket is installed inside the monitoring box. A near-infrared spectrometer is installed inside the monitoring box. A connecting pipe is connected to the upper surface of the monitoring box.

[0005] A first support plate is installed on the outer surface of the ethanol distillation column body, a liquid storage tank is installed on the upper surface of the first support plate, and a liquid level gauge is installed on the outer surface of the liquid storage tank.

[0006] The outer surface of the ethanol distillation column body is connected to a cooling pipe, and the end of the cooling pipe away from the ethanol distillation column body is connected to the outer surface of the storage tank.

[0007] The outer surface of the storage tank is connected to a water outlet pipe, and a third electronic valve is installed on the outer surface of the water outlet pipe.

[0008] The outer surface of the ethanol distillation column body is connected to a discharge pipe, and a second electronic valve is installed on the outer surface of the discharge pipe.

[0009] The end of the connecting pipe away from the monitoring box is connected to the outer surface of the discharge pipe, and a first electronic valve is installed on the outer surface of the connecting pipe.

[0010] A controller is installed on the outer surface of the ethanol distillation column body, a support base is installed on the bottom surface of the ethanol distillation column body, a door is hinged to the right side of the monitoring box, and a feed pipe is connected to the outer surface of the ethanol distillation column body.

[0011] Compared with the prior art, the present invention has the following advantages: This invention connects directly to the discharge pipe via a connecting pipe, enabling simultaneous sample diversion to the collection bucket as material is discharged. Combined with a near-infrared spectroscopy analyzer, it allows for rapid on-site detection without waiting for laboratory analysis results, significantly improving the real-time nature of monitoring. Furthermore, the application of near-infrared spectroscopy ensures the accuracy of component and purity analysis, effectively addressing the challenge of real-time component measurement in traditional methods. Simultaneously, a motor drives the support column to rotate, an electric slide rail enables horizontal movement, and an electric lifting rod controls vertical lifting. Combined with an electric telescopic rod driving the dropper for liquid aspiration and sample dispensing, the entire process requires no manual operation, drastically reducing labor costs and time consumption.

[0012] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0013] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of the online monitoring device for the side stream output of an ethyl ester distillation column; Figure 2 Right view of the online monitoring device for the side stream sampling of the ethyl ester distillation column; Figure 3 A cross-sectional view of the monitoring box in the online monitoring device for the side stream sampling of the ethyl ester distillation column; Figure 4 Rear view of the online monitoring device for the side stream sampling of the ethyl ester distillation column; Figure 5 This is a top view of the online monitoring device for the side stream sampling of the ethyl ester distillation column.

[0014] In the diagram: 1-Ethanol distillation column body; 2-Support base; 3-Feed pipe; 4-Cooling pipe; 5-Storage tank; 6-Level gauge; 7-First support plate; 8-Monitoring box; 9-Controller; 10-Water outlet pipe; 11-Third electronic valve; 12-Discharge pipe; 13-Second electronic valve; 14-Box door; 15-Second support plate; 16-Support column; 17-Motor; 18-Fixed column; 19-Electric slide rail; 20-Electric lifting rod; 21-Support frame; 22-Near-infrared spectrometer; 23-Electric telescopic rod; 24-Drip tube; 25-Collection bucket; 26-Connecting pipe; 27-First electronic valve. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0016] like Figures 1 to 5As shown, the online monitoring device for the side stream sampling of the ethanol distillation column includes an ethanol distillation column body 1. A second support plate 15 is installed on the outer surface of the ethanol distillation column body 1. A monitoring box 8 is installed on the upper surface of the second support plate 15. A fixed column 18 is installed inside the monitoring box 8. A motor 17 is installed on the inner top wall of the fixed column 18. The output end of the motor 17 passes through the fixed column 18 and is connected to a support column 16. An electric slide rail 19 is installed on the bottom surface of the support column 16. An electric lifting rod 20 is slidably installed on the outer surface of the electric slide rail 19. A support frame 21 is installed on the output end of the electric lifting rod 20. Two electric telescopic rods 23 are installed on the inner wall of the support frame 21. A dropper 24 is installed on the output end of the two electric telescopic rods 23. A collection bucket 25 is installed inside the monitoring box 8. A near-infrared spectrometer 22 is installed inside the monitoring box 8. A connecting pipe 26 is connected to the upper surface of the monitoring box 8.

[0017] A first support plate 7 is installed on the outer surface of the ethanol distillation column body 1, providing a stable mounting point for the storage tank 5 and preventing displacement of the storage tank 5 due to material weight or vibration, thus avoiding leakage. The storage tank 5 is installed on the upper surface of the first support plate 7 and is used to temporarily store the liquid cooled by the cooling pipe 4. A level gauge 6 is installed on the outer surface of the storage tank 5. The outer surface of the ethanol distillation column body 1 is connected to the cooling pipe 4, with one end connected to the ethanol distillation column body 1 and the other end connected to the storage tank 5, for cooling the water vapor discharged from the distillation column. The end of the cooling pipe 4 away from the ethanol distillation column body 1 is connected to the outer surface of the storage tank 5.

[0018] The outer surface of the storage tank 5 is connected to a water outlet pipe 10, which serves as a discharge channel for the storage tank 5 to discharge the liquid inside. A third electronic valve 11 is installed on the outer surface of the water outlet pipe 10 and is controlled by the controller 9 to control the opening and closing of the water outlet pipe 10 and the drainage flow rate, ensuring that the discharge operation is orderly and controllable. The outer surface of the ethanol distillation tower body 1 is connected to a discharge pipe 12, which is the main discharge channel for qualified materials after distillation, transporting the purified materials to subsequent production stages. The outer surface of the discharge pipe 12 is connected to a second electronic valve 13, which is controlled by the controller 9 to control the switch and opening degree, adjusting the material discharge flow rate and rhythm to achieve precise control. The end of the connecting pipe 26 away from the monitoring box 8 is connected to the outer surface of the discharge pipe 12. A first electronic valve 27 is installed on the outer surface of the connecting pipe 26 and is controlled by the controller 9 to adjust the amount of sample entering the monitoring box 8, ensuring that the monitoring requirements are met without affecting the discharge of the main material.

[0019] A controller 9 is installed on the outer surface of the ethanol distillation column body 1. As the control core, it receives data from the near-infrared spectrometer 22 and controls the operation of various electronic valves, motors 17 and other components. A support base 2 is installed on the bottom surface of the ethanol distillation column body 1 to provide stable support, counteract the vibration during the operation of the distillation column, prevent equipment displacement or tipping, and ensure the stable operation of the distillation process. A door 14 is hinged to the right side of the monitoring box 8, which allows operators to open the monitoring box 8 to maintain, repair or clean the internal equipment or the collection tank 25. The outer surface of the ethanol distillation column body 1 is connected to the feed pipe 3, which connects the external raw material system to the ethanol distillation column body 1 and is the channel for the raw material mixture to enter the distillation column, ensuring a stable input of raw materials.

[0020] Working principle: When it is necessary to discharge processed ethanol, the controller 9 can open the second electronic valve 13 on the discharge pipe 12 to allow the ethanol to flow along the discharge pipe 12 to the subsequent processing point. If side-line sampling monitoring is required at this time, the controller 9 can open the first electronic valve 27 on the connecting pipe 26 to allow some ethanol to flow into the collection tank 25 of the monitoring box 8 through the connecting pipe 26. Subsequently, the controller 9 starts the motor 17, adjusts the position of the electric lifting rod 20 by rotating the support column 16, and then drives the electric lifting rod 20 to move horizontally above the collection tank 25 by the electric slide rail 19. The electric lifting rod 20 descends, allowing the dropper 24 to extend into the sample in the collection tank 25. The electric telescopic rod 23 completes the liquid aspiration. After the liquid aspiration is completed, the electric lifting rod 20 rises, and the electric slide rail 19 moves it to the near-infrared spectrometer 22. The electric telescopic rod 23 controls the dropper 24 to drip the sample into the detection area of ​​the analyzer. After the near-infrared spectrometer 22 analyzes the sample composition and purity, it transmits the data to the controller 9.

Claims

1. An online monitoring device for the side stream output of an ethyl ester distillation column, characterized in that, The ethanol distillation column includes a main body (1), on the outer surface of which a second support plate (15) is installed. A monitoring box (8) is installed on the upper surface of the second support plate (15). A fixed column (18) is installed inside the monitoring box (8). A motor (17) is installed on the inner top wall of the fixed column (18). The output end of the motor (17) passes through the fixed column (18) and is connected to a support column (16). An electric slide rail (19) is installed on the bottom surface of the support column (16). An electric lifting rod (20) is slidably mounted on the outer surface of the monitoring box (8). A support frame (21) is mounted on the output end of the electric lifting rod (20). Two electric telescopic rods (23) are mounted on the inner wall of the support frame (21). A dropper (24) is mounted on the output end of the two electric telescopic rods (23). A collection bucket (25) is installed inside the monitoring box (8). A near-infrared spectrometer (22) is installed inside the monitoring box (8). A connecting pipe (26) is connected to the upper surface of the monitoring box (8).

2. The online monitoring device for the side stream output of the ethyl ester distillation column according to claim 1, characterized in that, The outer surface of the ethanol distillation column body (1) is equipped with a first support plate (7), the upper surface of the first support plate (7) is equipped with a liquid storage tank (5), and the outer surface of the liquid storage tank (5) is equipped with a level gauge (6).

3. The online monitoring device for the side stream output of the ethyl ester distillation column according to claim 1, characterized in that, The outer surface of the ethanol distillation column body (1) is connected to a cooling pipe (4), and the end of the cooling pipe (4) away from the ethanol distillation column body (1) is connected to the outer surface of the storage tank (5).

4. The online monitoring device for the side stream output of the ethyl ester distillation column according to claim 2, characterized in that, The outer surface of the storage tank (5) is connected to a water outlet pipe (10), and a third electronic valve (11) is installed on the outer surface of the water outlet pipe (10).

5. The online monitoring device for the side stream output of the ethyl ester distillation column according to claim 1, characterized in that, The outer surface of the ethanol distillation column body (1) is connected to a discharge pipe (12), and a second electronic valve (13) is installed on the outer surface of the discharge pipe (12).

6. The online monitoring device for the side stream output of the ethyl ester distillation column according to claim 1, characterized in that, The end of the connecting pipe (26) away from the monitoring box (8) is connected to the outer surface of the discharge pipe (12), and a first electronic valve (27) is installed on the outer surface of the connecting pipe (26).

7. The online monitoring device for the side stream output of the ethyl ester distillation column according to claim 6, characterized in that, A controller (9) is installed on the outer surface of the ethanol distillation column body (1), a support base (2) is installed on the bottom surface of the ethanol distillation column body (1), a door (14) is hinged to the right side of the monitoring box (8), and a feed pipe (3) is connected to the outer surface of the ethanol distillation column body (1).

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