Vacuum rectifying device facilitating real-time sampling

Abstract

The utility model relates to rectification technical field, concretely is a kind of vacuum rectification device convenient to real-time sampling, including the rectification tank for mixture vacuum fractionation and the collection tank of collecting distillate;Rectification tank upper part inside wall is equipped with collection ring, and distillate flows into collection ring after condensing in rectification tank top inner wall;Collection ring is communicated with the collection tank located below rectification tank by connecting pipe, and upper communication valve is equipped at the connecting place of connecting pipe and collection ring, and lower communication valve is equipped at the connecting place of connecting pipe and collection tank;The part of connecting pipe between upper communication valve and lower communication valve is connected with gas delivery pipe, material taking pipe in turn;Gas delivery pipe is used to input inert gas to connecting pipe, and gas delivery pipe is equipped with gas valve;Material taking pipe is communicated with outside, and is equipped with material taking valve.The utility model can achieve the purpose of real-time sampling, and grasps rectification effect in first time.

Description

Technical Field

[0001] This utility model relates to the field of distillation technology, specifically a vacuum distillation device that facilitates real-time sampling. Background Technology

[0002] Reduced pressure distillation is a separation technique that increases the boiling point difference between components in a mixture by reducing the system pressure. It is particularly suitable for separating high-boiling-point mixtures and high-temperature polymerizable systems, such as ethylbenzene / styrene mixtures and the purification of high-boiling-point components like diethylbenzene and triethylbenzene. In this process, precise pressure control directly affects the separation efficiency; therefore, real-time monitoring of the distillate composition is necessary to optimize operating parameters.

[0003] Due to design limitations, existing vacuum distillation units have excessively long sampling waiting times, failing to achieve real-time sampling and making it impossible to grasp the distillation effect immediately. This results in the inability to take timely actions, such as adjusting distillation parameters. This lag not only increases time costs and workload but also leads to energy loss due to deviations from optimal operating conditions. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a vacuum distillation apparatus that facilitates real-time sampling, thereby solving the aforementioned problems.

[0005] This utility model provides the following technical solution: a vacuum distillation apparatus for easy real-time sampling, comprising a distillation tank for vacuum fractionation of mixtures and a collection tank for collecting distillates; a collection ring is circumferentially provided on the inner wall of the upper part of the distillation tank, and the distillates flow into the collection ring after condensation on the inner wall of the top of the distillation tank; the collection ring is connected to the collection tank located below the distillation tank through a connecting pipe, an upper connecting valve is provided at the connection between the connecting pipe and the collection ring, and a lower connecting valve is provided at the connection between the connecting pipe and the collection tank; the portion of the connecting pipe located between the upper connecting valve and the lower connecting valve is sequentially connected to a gas supply pipe and a feed pipe; the gas supply pipe is used to input inert gas into the connecting pipe, and the gas supply pipe is provided with a gas valve; the feed pipe is connected to the outside and is provided with a feed valve.

[0006] Furthermore, the distillation tank is equipped with a stirring shaft inside, a drive motor is installed at the top of the distillation tank, and one or more scraper blocks are installed inside the collecting ring. The scraper blocks are all connected to the stirring shaft through a support frame. The stirring shaft rotates under the drive motor, thereby driving the scraper blocks to move circumferentially within the collecting ring, and thus pushing the liquefied distillate into the connecting pipe.

[0007] Furthermore, the scraper block abuts against the inner wall of the distillation tank.

[0008] Furthermore, the collecting ring has a ring-shaped structure, the outer circumferential surface of the collecting ring is connected to the inner wall of the distillation tank, and the inner circumferential surface of the collecting ring is provided with an annular boss facing the top of the distillation tank.

[0009] Furthermore, one end of the stirring shaft is connected to a drive motor, and the other end of the stirring shaft is connected to one or more stirring components. The stirring components are arranged at equal intervals along the axial direction of the stirring shaft, and each set of stirring components consists of several stirring rods evenly arranged along the circumference of the stirring shaft.

[0010] Furthermore, the inner wall of the top of the distillation tank has a conical structure, with the smaller diameter end at the top and the larger diameter end at the bottom. Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model connects the collecting ring to the collecting tank through a connecting pipe. The connecting pipe is also connected to the gas supply pipe and the material receiving pipe. When sampling is required, there is no need to interrupt the distillation reaction and keep all components working continuously. Simply close the upper connecting valve and the lower connecting valve, open the gas supply valve to let inert gas into the connecting pipe, so that the pressure inside and outside the connecting pipe is the same. Then close the gas supply valve and open the material receiving valve to achieve real-time sampling.

[0011] 2. The present invention has a scraper block inside the collection ring. The scraper block moves circumferentially under the drive of the stirring shaft, pushing the liquefied distillate collected in the collection ring into the connecting pipe. This can continuously realize the scraping and conveying operation of the distillate in the collection ring, preventing the distillate from overflowing the collection ring and discharging it from the connecting pipe in a timely manner.

[0012] 3. The scraper block of this utility model abuts against the inner wall of the distillation tank, which can provide horizontal support for the vertically set stirring shaft and ensure the stability of the stirring shaft; at the same time, it can also scrape the distillate collected on the inner wall of the distillation tank into the collection ring in a timely manner.

[0013] 4. The axially equidistant and circumferentially uniform arrangement of the stirring rods in this utility model helps to balance the forces on the stirring shaft and stirring rods, reduce stress concentration and vibration, and improve the stability and reliability of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a longitudinal sectional view of the present invention.

[0016] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0017] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.

[0018] The components are: 1-Distillation tank, 2-Support leg, 3-Collection tank, 4-Feed pipe, 5-Drive motor, 6-Vacuum pump, 7-Connecting pipe, 8-Gas supply pipe, 9-Stirring shaft, 10-Stirring rod, 11-First discharge pipe, 12-Connecting rod, 13-Collection ring, 14-Support frame, 15-Scraper block, 16-Upper connecting valve, 17-Gas valve, 18-Lower connecting valve, 19-Taking pipe, 20-Taking valve. Detailed Implementation

[0019] 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.

[0020] This invention provides a vacuum distillation apparatus that facilitates real-time sampling, such as... Figure 1 As shown, the vacuum distillation apparatus includes a distillation tank 1 at the top and a collection tank 3 at the bottom. The distillation tank 1 is used for vacuum fractionation of the mixture. The internal structure of the distillation tank 1 for vacuum distillation, heating, and condensation are common features in the prior art. For example, the top of the distillation tank 1 is equipped with a vacuum pump 6, which is used to regulate the internal pressure of the distillation tank 1; the inner wall of the top of the distillation tank 1 is equipped with a condensation component for condensing and liquefying the fractionated distillate; and the top of the distillation tank 1 is equipped with a heating component for heating the mixture.

[0021] In this embodiment, as Figure 2 As shown, the distillation tank 1 is a cylindrical tank with multiple support legs 2 installed at the bottom. The collection tank 3 is located in the space between the support legs 2 and is used to collect the distillate. The bottom of the distillation tank 1 is also equipped with several connecting rods 12 for connecting to the top of the collection tank 3. The side wall of the distillation tank 1 is equipped with a feed pipe 4, and the feed pipe 4 is equipped with a feed valve. The opening and closing of the feed valve corresponds to whether the feed pipe 4 is connected to the inside of the distillation tank 1.

[0022] The top and bottom of the distillation tank 1 and the bottom of the collection tank 3 are all concave structures. In this embodiment, the inner wall of the top of the distillation tank 1 is conical, with the small diameter end of the inner wall of the top of the distillation tank 1 at the top and the large diameter end at the bottom, which facilitates the liquefaction of the distillate and its collection along the inner wall of the top of the distillation tank 1 to the side wall of the distillation tank. The inner wall of the bottom of the distillation tank 1 is also conical, with the small diameter end of the inner wall of the bottom of the distillation tank 1 at the bottom and the large diameter end at the top. The small diameter end of the inner wall of the bottom of the distillation tank 1 is provided with a first discharge pipe 11 that communicates with the collection tank 3. The first discharge pipe 11 is provided with a first discharge valve, and the opening and closing of the first discharge valve corresponds to whether the first discharge pipe 11 is connected to the inside of the collection tank 3.

[0023] The bottom inner wall of the collecting tank 3 is a conical structure. The small diameter end of the bottom inner wall of the distillation tank 1 is at the bottom and the large diameter end is at the top. The small diameter end of the bottom inner wall of the collecting tank 3 is provided with a second discharge pipe that communicates with the outside. A second discharge valve is provided on the second discharge pipe. The opening and closing of the second discharge valve corresponds to whether the second discharge pipe is connected to the outside.

[0024] A collection ring 13 is also provided circumferentially on the inner sidewall of the upper part of the distillation tank 1. In this embodiment, the collection ring 13 is close to the top of the distillation tank 1 and is located below the inner wall of the top of the distillation tank 1. In this embodiment, the collection ring 13 has a ring structure. The outer circumferential surface of the collection ring 13 is connected to the inner sidewall of the distillation tank 1. The inner circumferential surface of the collection ring 13 is provided with an annular boss facing the top of the distillation tank 1. When the distillate rises and contacts the condensation component, it liquefies and then flows into the collection ring 13 along the inner wall of the top and the inner sidewall of the distillation tank 1. The annular boss prevents the liquefied distillate from overflowing the collection ring 13.

[0025] like Figure 3 , Figure 4 As shown, the collecting ring 13 is connected to the collecting tank 3 located below the distillation tank 1 via a connecting pipe 7 located outside the vacuum distillation unit. An upper connecting valve 16 is provided at the connection between the connecting pipe 7 and the collecting ring 13, and a lower connecting valve 18 is provided at the connection between the connecting pipe 7 and the collecting tank 3. The opening and closing of the upper connecting valve 16 and the lower connecting valve 18 correspond to whether the connecting pipe 7 is connected to the collecting ring 13 and the collecting tank 3, respectively.

[0026] The connecting pipe 7, located between the upper connecting valve 16 and the lower connecting valve 18, is sequentially connected to the gas supply pipe 8 and the material receiving pipe 19. The gas supply pipe 8 is used to input inert gas into the connecting pipe 7. In this embodiment, the inert gas is nitrogen. The gas supply pipe 8 is connected to an external nitrogen storage tank, and the gas supply pipe 8 is equipped with a gas valve 17. The opening and closing of the gas valve 17 corresponds to whether the gas supply pipe 8 is connected to the external nitrogen storage tank. When the upper connecting valve 16 and the lower connecting valve 18 are closed, and the gas valve 17 is opened, the inert gas will enter the connecting pipe 7, making the internal gas pressure of the connecting pipe 7 the same as the external pressure.

[0027] The sampling pipe 19 is connected to the outside and is equipped with a sampling valve 20. The opening and closing of the sampling valve 20 corresponds to whether the sampling pipe 19 is connected to the outside. When the sampling pipe 19 is connected to the outside, it can be used to sample the distillate in the connecting pipe 7.

[0028] In this embodiment, a stirring shaft 9 is vertically installed inside the distillation tank 1, and a drive motor 5 is installed at the top of the distillation tank 1. One end of the stirring shaft 9 is connected to the drive motor 5, and the other end of the stirring shaft 9 is connected to one or more stirring components. The stirring components are arranged at equal intervals along the axial direction of the stirring shaft 9, and each set of stirring components consists of several stirring rods 10 evenly arranged around the circumference of the stirring shaft 9. The axially evenly spaced and circumferentially even arrangement of the stirring rods 10 helps to balance the forces on the stirring shaft 9 and the stirring rods 10, reduce stress concentration and vibration, improve the stability and reliability of the equipment, and also makes the manufacturing of the stirring shaft 9 and the stirring rods 10 simpler and more standardized, reducing costs and improving the versatility of the equipment.

[0029] Furthermore, the collecting ring 13 has one or more scraping blocks 15 inside, and each scraping block 15 is connected to the stirring shaft 9 through a support frame 14. In this embodiment, the support frame 14 includes a connecting ring fixed on the stirring shaft 9 and one or more support rods. One end of the support rod is fixed to the connecting ring, and the other end of the support rod is connected to the scraping block 15.

[0030] The stirring shaft 9 rotates under the drive of the drive motor 5, thereby driving the stirring assembly to rotate and making the mixture heat evenly; at the same time, the stirring shaft 9 drives the scraper block 15 to move circumferentially within the collection ring 13 through the support frame 14, thereby pushing the liquefied distillate into the connecting pipe 7.

[0031] Preferably, the scraper block 15 abuts against the inner wall of the distillation tank 1, which can provide horizontal support for the vertically arranged stirring shaft 9, further ensuring the stability of the stirring shaft 9.

[0032] The working principle of this utility model is as follows: Open the feed valve in the feed pipe 4 and let the mixture that needs to be separated by distillation flow into the distillation tank 1 through the feed pipe 4. After the mixture enters the distillation tank 1, close the feed valve.

[0033] Then, the vacuum pump 6 is started to reduce the pressure in the distillation tank 1. The drive motor 5 is started to drive the stirring shaft 9 and the stirring rod 10 to rotate, stirring the mixture to be separated at a uniform and slow speed. The heating component and the condensing component are started, and the upper connecting valve 16 and the lower connecting valve 18 are opened, while the gas valve 17 and the feed valve 20 are closed. At this time, the mixture in the distillation tank 1 is separated by distillation under stirring. That is, the material with a lower boiling point vaporizes and rises to the top of the distillation tank 1 and meets the condensing component. Then, it liquefies and collects from the inner wall of the top of the distillation tank 1 to the side wall and drips into the collection ring 13.

[0034] During the process, the drive motor 5 drives the stirring shaft 9 to rotate continuously, and at the same time drives the stirring rod 10 and the scraper block 15 to rotate. The scraper block 15 can scrape the distillate that has accumulated on the side wall of the distillation tank 1 into the collection ring 13, and push the distillate collected in the collection ring 13 into the connecting pipe 7, and finally into the collection tank 3.

[0035] If it is necessary to sample and observe the distillation effect, there is no need to stop the distillation process. The stirring shaft 9 and other components can be kept running. Close the upper connecting valve 16 and the lower connecting valve 18, open the gas valve 17, and let nitrogen gas be slowly sent into the connecting pipe 7 to achieve pressure balance with the outside. Then close the gas valve 17 and open the feed valve 20. The liquid in the connecting pipe 7 can be collected from the feed pipe 19. After that, observe and detect it, and adjust the distillation parameters in real time, such as changing the temperature.

[0036] The material collected in the collection tank 3 can eventually be discharged from the second discharge pipe by opening the second discharge valve; the reaction residue in the distillation tank 1 can be discharged from the collection tank 3 by opening the first discharge valve, entering from the first discharge pipe 11 and eventually being discharged through the second discharge pipe.

[0037] It will be apparent to those skilled in the art that this invention 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 essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vacuum distillation apparatus for convenient real-time sampling, characterized in that: It includes a distillation tank (1) for vacuum fractionation of mixtures and a collection tank (3) for collecting distillates; The upper part of the distillation tank (1) has a collection ring (13) circumferentially arranged on the inner wall. The distillate flows into the collection ring (13) after condensing on the inner wall of the top of the distillation tank (1). The collection ring (13) is connected to the collection tank (3) located below the distillation tank (1) through a connecting pipe (7). An upper connecting valve (16) is provided at the connection between the connecting pipe (7) and the collection ring (13), and a lower connecting valve (18) is provided at the connection between the connecting pipe (7) and the collection tank (3). The connecting pipe (7) is located between the upper connecting valve (16) and the lower connecting valve (18), and is connected to the air supply pipe (8) and the material receiving pipe (19) in sequence; the air supply pipe (8) is used to input inert gas into the connecting pipe (7), and the air supply pipe (8) is equipped with a gas valve (17); the material receiving pipe (19) is connected to the outside and is equipped with a material receiving valve (20).

2. The vacuum distillation apparatus for convenient real-time sampling according to claim 1, characterized in that: The distillation tank (1) is equipped with a stirring shaft (9) inside, and a drive motor (5) is provided on the top of the distillation tank (1). The collection ring (13) is equipped with one or more scraper blocks (15) inside, and the scraper blocks (15) are all connected to the stirring shaft (9) through a support frame (14). The stirring shaft (9) rotates under the drive of the drive motor (5), thereby causing the scraper block (15) to move circumferentially within the collection ring (13), and thus pushing the liquefied distillate into the connecting pipe (7).

3. The vacuum distillation apparatus for convenient real-time sampling according to claim 2, characterized in that: The scraper block (15) abuts against the inner wall of the distillation tank (1).

4. The vacuum distillation apparatus for convenient real-time sampling according to any one of claims 1-3, characterized in that: The collecting ring (13) is a ring structure. The outer circumferential surface of the collecting ring (13) is connected to the inner wall of the distillation tank (1). The inner circumferential surface of the collecting ring (13) is provided with an annular boss facing the top of the distillation tank (1).

5. The vacuum distillation apparatus for convenient real-time sampling according to claim 4, characterized in that: One end of the stirring shaft (9) is connected to the drive motor (5), and the other end of the stirring shaft (9) is connected to one or more stirring components. The stirring components are arranged at equal intervals along the axial direction of the stirring shaft (9), and each stirring component consists of several stirring rods (10) evenly arranged along the circumference of the stirring shaft (9).

6. The vacuum distillation apparatus for convenient real-time sampling according to claim 4, characterized in that: The inner wall of the top of the distillation tank (1) is a conical structure, with the smaller diameter end at the top and the larger diameter end at the bottom.

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