Rectifying tower capable of adjusting feeding position

Abstract

The utility model provides a rectifying tower with an adjustable feeding position. Relates to the field of rectification equipment, and aims to solve the problem of low test efficiency caused by inconvenience in adjustment during test of a feed port of a rectification tower at present. Two sections of elastic hoses are arranged in an adjusting pipe, and a sliding plate and a screen plate are mounted on the elastic hoses, so that a rectification inlet of the adjusting pipe is formed between the two sections of elastic hoses; and the position and the distance of the rectification inlet can be adjusted, so that the requirement of conveniently adjusting the material feeding position when the parameters of the rectification device are optimized is met, and the testing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of rectification equipment, and particularly relates to a rectification column with adjustable feeding position. Background Art

[0002] In the process of chemical production, rectification is an important link in the purification of chemical substances. In the laboratory and industrial production processes, various optimal parameters of the rectification device need to be tested and selected. For example, it is necessary to accurately find and determine the feeding port position required to meet the product requirements during the rectification process.

[0003] In the traditional rectification process, the position of the feeding port needs to be determined through a large number of cumbersome calculations combined with tests in the experiment. During this process, a large amount of time will be consumed. Since the feeding port also needs to ensure good penetration and good isolation from the outside, the rectification device needs to be disassembled and assembled to adjust the position of the feeding port. The entire rectification process takes a long time and affects the efficiency. Chinese Patent (Publication No.: CN211836392U) discloses an adjustable multi-purpose rectification column, which uses a modular structure to adjust different feeding positions and tower heights according to the use needs when the main structure of the rectification column remains unchanged; the modular design adopted by it realizes the adjustment of the feeding position by setting multiple openable or sealable feeding ports on the feeding tower body assembly. The tower body structure is complex, and the non-working feeding ports also affect the structural layout of the tower body, and still a large amount of transformation of the tower body structure is required to achieve it; moreover, the spacing between multiple vertically arranged feeding ports is still a fixed value, and only the change of the feeding port at multiple points can be realized, and the area between adjacent feeding ports cannot be covered. When optimizing the parameters of the rectification device, the requirements still cannot be met, resulting in limited testing and selection of parameters and affecting the operation effect of the rectification device. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rectification column with adjustable feeding position for the defects existing in the prior art. Two sections of elastic hoses are arranged in the adjusting pipe, and a sliding plate and a net plate are installed on the elastic hoses, so as to establish a rectification inlet of the adjusting pipe between the two sections of elastic hoses. When the pulling assembly drives the sliding plate and the net plate to move, the position and spacing of the rectification inlet can be adjusted, so as to meet the requirement of conveniently adjusting the material feeding position when optimizing the parameters of the rectification device and improve the testing efficiency.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] A rectification column with adjustable feed position, comprising a column body and a rectification column installed in the column body. An adjusting pipe is arranged along the axis in the rectification column. The side wall of the adjusting pipe is an orifice plate, and the outside is an annular working area. Two elastic hoses arranged in sequence along the axial direction are provided in the adjusting pipe. The side wall of the elastic hose is attached to the inner wall of the orifice plate to block the orifice plate at the attachment position. An annular rectification inlet is formed between the two elastic hoses. One end of one of the elastic hoses close to the rectification inlet is blocked by a sliding plate, and a mesh plate is installed at one end of the other elastic hose close to the rectification inlet. The sliding plate and the mesh plate are connected with a pulling assembly, and the pulling assembly can drive the sliding plate and the mesh plate to move to adjust the position of the rectification inlet.

[0007] Further, the other end of the elastic hose connected to the sliding plate extends to one end of the adjusting pipe and is fixed. The other end of the elastic hose connected to the mesh plate extends to the other end of the adjusting pipe and is fixed. The pulling assembly drives the sliding plate and the mesh plate to move axially to adjust the distance between the sliding plate and the mesh plate and / or the position of the adjusting pipe where they are located.

[0008] Further, the mesh plate and the sliding plate are connected by a connecting rod and are synchronously driven by the pulling assembly.

[0009] Further, a feed channel is formed inside the elastic hose connected to the mesh plate, and the feed channel penetrates through the mesh plate to communicate with the rectification inlet.

[0010] Further, the pulling assembly includes a driving member and a winding drum. A flexible cable is wound on the winding drum. One end of the flexible cable released by the winding drum is connected to the sliding plate or the mesh plate. The output end of the driving member is connected to the winding drum. When the winding drum is driven by the driving member, the flexible cable drives the sliding plate or the mesh plate to move axially along the adjusting pipe.

[0011] Further, the sliding plate and the mesh plate are respectively connected with a pulling assembly. The winding drum is located outside the elastic hose, and the flexible cable passes through the elastic hose to connect the sliding plate or the mesh plate.

[0012] Further, the elastic hose includes a flexible wall and a spring. The flexible wall is arranged circumferentially around the spring and is connected to the spring, so that the elastic hose forms a cylindrical structure.

[0013] Further, in the axial direction of the rectification column, the working area between the top end of the rectification inlet and the top end of the working area forms a rectification section, and the working area between the bottom end of the rectification inlet and the bottom end of the working area forms a stripping section.

[0014] Further, through holes are arrayed on the mesh plate.

[0015] Further, the adjusting pipe is detachably fixed to the rectification column.

[0016] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0017] (1) Aiming at the problem of low test efficiency caused by the inconvenience of adjusting the feed port of the rectification column during the current test, two elastic hoses are arranged in the adjusting pipe, and a sliding plate and a mesh plate are installed on the elastic hoses, so as to establish a rectification inlet of the adjusting pipe between the two elastic hoses. When the pulling assembly drives the sliding plate and the mesh plate to move, the position and spacing of the rectification inlet can be adjusted, so as to meet the need for conveniently adjusting the material feed position when optimizing the parameters of the rectification device and improve the test efficiency.

[0018] (2) Using the elastic hose as the structure for blocking the mesh plate of the adjusting pipe network at the non-rectification inlet position can elongate or shorten following the position changes of the mesh plate and the sliding plate, maintaining the isolation between the inside of the adjusting pipe and the working area at the non-rectification inlet position, achieving the directional guidance of the material in the adjusting pipe, so that the material can be accurately output from the rectification inlet position to meet the test requirements.

[0019] (3) The mesh plate and the sliding plate can move together or separately. When moving together, a single pulling assembly can be used to drive, jointly changing the relative position with the adjusting pipe to improve the adjustment efficiency. When the mesh plate and the sliding plate move separately, the relative position between the mesh plate and the sliding plate can change, so that not only the position of the rectification inlet can be adjusted, but also the axial length of the rectification inlet can be adjusted to meet diverse test requirements.

[0020] (4) The elastic hose adopts a combination of a flexible wall and a spring. The spring can be compressed or elongated according to the position requirements of the sliding plate and the mesh plate, and can assist the reset of the sliding plate and the mesh plate. The flexible wall can fold following the compression of the spring and unfold following the elongation of the spring to meet the need for isolating the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The attached drawings of the specification, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0022] Figure 1 It is a schematic diagram of the rectification column with adjustable feed position in Embodiments 1 and 2 of the present utility model.

[0023] Figure 2 It is a top view schematic diagram of the rectification column with adjustable feed position in Embodiments 1 and 2 of the present utility model.

[0024] Figure 3 It is a schematic diagram of the connection mode between the servo motor and the transmission shaft in Embodiments 1 and 2 of the present utility model.

[0025] Figure 4 It is a schematic diagram of the arrangement of the photoelectric sensors on the driving turntable in Embodiments 1 and 2 of the present utility model.

[0026] Figure 5 This is a schematic diagram of the rectification column with adjustable feed position during operation in Embodiments 1 and 2 of the present utility model.

[0027] Among them, 1. rectification column, 2. adjustment pipe, 3. orifice plate, 4. magnetic coupling drive, 5. driving member, 6. winding drum, 7. first elastic hose, 8. flexible cable, 9. sliding plate, 10. mesh plate, 11. flexible wall, 12. second elastic hose, 13. rectification inlet, 14. spring. Specific embodiments

[0028] In a typical embodiment of the present utility model, as Figures 1 - 5 shown, a rectification column with adjustable feed position is proposed.

[0029] Currently, in order to determine the feed port position with good rectification efficiency for a rectification column, experiments and tests are required, but it is not convenient to change the feed port position, and the adjustment range and adjustment accuracy of the feed port are insufficient, resulting in difficulty in testing the feed port position that meets the rectification requirements. Based on this, this embodiment provides a rectification column with adjustable feed position. An adjustment pipe 2 is arranged in the rectification column 1, and two elastic hoses with adjustable axial lengths are installed in the adjustment pipe 2. The rectification inlet 13 formed between the elastic hoses serves as the feed port of the rectification column 1. The rectification inlet 13 can change its position when the elastic hoses expand and contract, meeting the requirements during the test of the feed position of the rectification column.

[0030] Refer to Figure 1 , the rectification column with adjustable feed position includes a tower body and a rectification column 1 installed in the tower body. The rectification column 1 is a columnar structure and can be installed at the required position in the tower body according to requirements. An adjustment pipe 2 is provided along the axis in the rectification column 1. The side wall of the adjustment pipe 2 is an orifice plate 3. As Figure 2 shown, the external is an annular working area B; the material to be rectified and separated is supplied into the adjustment pipe 2 through a pipeline at one end. The orifice plate 3 adopted on the side wall of the adjustment pipe 2 enables the material to pass through, so that the material radially passes through the orifice plate 3 on the side wall of the adjustment pipe 2 and enters the working area B outside the adjustment pipe 2.

[0031] In this embodiment, the working area B can adopt a tray structure or a packing structure. The material fed into the adjustment pipe 2 can pass through the orifice plate 3 and enter the working area B for rectification and separation. When adopting a tray structure, installation holes for installing the adjustment pipe 2 are provided on the tray, so that the adjustment pipe 2 can be stably installed in the tower body. When adopting a packing structure, rectification packing is arranged in the annular working area B outside the adjustment pipe 2, and the overall forms an annular working area B with a horizontal cross-section.

[0032] In addition, as Figure 2As shown, the side wall of the regulating pipe 2 is a closed annular orifice plate 3. Through holes are arranged in an array on the orifice plate 3. Parameters such as the size, spacing, and density of the through holes can be configured according to the rectification requirements so that the material can pass through the through holes on the orifice plate 3. The regulating pipe 2 can be fixed to the skeleton structure of the rectification column 1 by welding, or can be detachably installed on the rectification column 1 through fasteners such as bolts and screws.

[0033] As Figure 3 shown, two sections of elastic hoses arranged in sequence along the axis are provided inside the regulating pipe 2. The side wall of the elastic hose is attached to the inner wall of the orifice plate 3 to block the orifice plate 3 at the attachment position. The elastic hose can expand and contract axially, changing the axial length to adjust the area covering the orifice plate 3.

[0034] An annular rectification inlet 13 is formed between the two sections of elastic hoses. Since the orifice plate 3 in the area covered by the elastic hose is blocked and the orifice plate 3 at the position of the rectification inlet 13 is not blocked by the elastic hose, after the material enters the regulating pipe 2, it flows inside one section of the elastic hose. When it flows to the position of the rectification inlet 13, it passes through the orifice plate 3 radially from the position of the rectification inlet 13 and enters the working area B.

[0035] One end of one section of the elastic hose close to the rectification inlet 13 is blocked by a slide plate 9, and a net plate 10 is installed at one end of the other section of the elastic hose close to the rectification inlet 13. The slide plate 9 can block the flow of the material inside the regulating pipe 2, promote the discharge of the material from the regulating pipe 2 through the rectification inlet 13 and into the working area B. The net plate 10 can allow the material to pass through. The net plate 10 can adopt a hollow frame structure. Its main function is to transmit the driving force applied by the traction assembly on the elastic hose so that the elastic hose can be stretched or compressed as needed.

[0036] The slide plate 9 and the net plate 10 are connected with a pulling assembly. The pulling assembly can drive the slide plate 9 and the net plate 10 to move to adjust the position of the rectification inlet 13. When the pulling assembly drives the slide plate 9 to change its position, it can compress or stretch the elastic hose connected to the slide plate 9. Similarly, when the net plate 10 is driven by the pulling assembly to change its position, it can compress or stretch the elastic hose connected to the net plate 10.

[0037] See Figure 3 , for the arrangement of the elastic hose inside the regulating pipe 2, the other end of the elastic hose connected to the slide plate 9 extends to one end of the regulating pipe 2 and is fixed. The end connected to the slide plate 9 is located inside the regulating pipe 2 and is arranged opposite to the net plate 10; the other end of the elastic hose connected to the net plate 10 extends to the other end of the regulating pipe 2 and is fixed. The end connected to the net plate 10 is located inside the regulating pipe 2 and is arranged opposite to the slide plate 9. When the pulling assembly drives the slide plate 9 and the net plate 10 to move axially, it can adjust the distance between the slide plate 9 and the net plate 10, and can also adjust the positions of the slide plate 9 and the net plate 10 relative to the regulating pipe 2.

[0038] Specifically, in this embodiment, the two elastic hoses are the first elastic hose 7 and the second elastic hose 12 respectively. A sliding plate 9 is connected to the first elastic hose 7, and a mesh plate 10 is connected to the second elastic hose 12. A feed channel A is formed in the second elastic hose 12. In addition, one end of the first elastic hose 7 away from the sliding plate 9 is connected to one end of the adjusting pipe 2, and the other end of the second elastic hose 12 away from the mesh plate 10 is connected to the other end of the adjusting pipe 2. As Figure 3 shown, taking the installation of the second elastic hose 12 at the lower part of the adjusting pipe 2 and the installation of the first elastic hose 7 at the upper part of the adjusting pipe 2 as an example, one end of the first elastic hose 7 is fixed to the top of the adjusting pipe 2, and the other end is connected to the sliding plate 9. By adjusting the position of the sliding plate 9, the axial length of the first elastic hose 7 can be changed, thereby changing the position of the upper end of the annular rectifying inlet 13. One end of the second elastic hose 12 is fixed to the bottom end of the adjusting pipe 2, and the other end is connected to the mesh plate 10. By adjusting the position of the mesh plate 10, the axial length of the second elastic hose 12 can be changed, that is, the length of the feed channel A can be changed, thereby changing the position of the lower end of the annular rectifying inlet 13.

[0039] When the first elastic hose 7 elongates and the second elastic hose 12 shortens equally, the axial length of the rectifying inlet 13 remains unchanged, and the position of the rectifying inlet 13 is adjusted to move towards the direction of the second elastic hose 12. On the contrary, when the second elastic hose 12 elongates and the first elastic hose 7 shortens equally, the axial length of the rectifying inlet 13 remains unchanged, and the position of the rectifying inlet 13 is adjusted to move towards the direction of the first elastic hose 7. In this way, the adjustment of the position of the rectifying inlet 13 is realized, meeting the requirement of accurately finding the position of the rectifying inlet 13 in the rectifying device during the laboratory and industrial production processes.

[0040] In order to keep the axial length of the rectifying inlet 13 unchanged, the mesh plate 10 and the sliding plate 9 can be connected by a connecting rod and driven synchronously by the traction assembly.

[0041] In addition, if the change amounts of the first elastic hose 7 and the second elastic hose 12 are different or the change directions are inconsistent, the axial length of the rectifying inlet 13 will change, thereby changing the axial coverage range of the material entering the working area B through the rectifying inlet 13. Therefore, in addition to adjusting and testing the position of the rectifying inlet 13, the area size of the rectifying inlet 13 can also be adjusted.

[0042] In order to change the size of the rectifying inlet 13, traction assemblies can be configured for the mesh plate 10 and the sliding plate 9 respectively, and the corresponding traction assemblies are used to control the movements of the mesh plate 10 and the sliding plate 9 respectively, so that the positions of the mesh plate 10 and the sliding plate 9 relative to the adjusting pipe 2 change, or the distance between the mesh plate 10 and the sliding plate 9 can also change.

[0043] As Figure 3As shown, the pulling assembly includes a driving member 5 and a winding drum 6. A flexible cable 8 is wound around the winding drum 6. One end of the flexible cable 8 released by the winding drum 6 is connected to the sliding plate 9 or the mesh plate 10. The output end of the driving member 5 is connected to the winding drum 6. When the winding drum 6 is driven by the driving member 5, the flexible cable 8 drives the sliding plate 9 or the mesh plate 10 to move axially along the adjusting tube 2.

[0044] In this embodiment, the driving member 5 can be a motor, such as a servo motor, a stepper motor, etc. The output end of the motor drives the winding drum 6 to rotate or stop through the magnetic coupling drive 4. When the winding drum 6 rotates, it can drive the mesh plate 10 or the sliding plate 9 to move through the flexible cable 8. The mesh plate 10 and the sliding plate 9 move axially along the adjusting tube 2 under the combined action of the flexible cable 8 and the elastic hose; when the winding drum 6 stops rotating, the motor can be locked to fix the position of the winding drum 6 and maintain the axial position of the mesh plate 10 and the sliding plate 9 relative to the adjusting tube 2.

[0045] Among them, the sliding plate 9 and the mesh plate 10 are respectively connected with a pulling assembly. The winding drum 6 is located outside the elastic hose. The flexible cable 8 passes through the elastic hose and is connected to the sliding plate 9 or the mesh plate 10, so as to realize the drive of the sliding plate 9 and the mesh plate 10 in combination with the elastic hose. The flexible cable 8 can be made of stainless steel flexible steel wire rope, etc., which can meet the requirements of strength, temperature, etc.

[0046] As Figure 4 shown, the elastic hose includes a flexible wall 11 and a spring 14. The flexible wall 11 is arranged circumferentially around the spring 14 and connected to the spring 14, so that the elastic hose forms a cylindrical structure. The flexible wall 11 can be made of flexible cloth resistant to the temperature in the rectification column, and has good sealing performance, which can prevent the working area B from passing through the orifice plate 3 and entering the flexible hose.

[0047] When selecting the spring 14, the spring 14 can resist the pressure of the material input into the adjusting tube 2 without displacement, so as to ensure the maintenance of the position of the rectification inlet 13.

[0048] As Figure 5 shown, axially on the rectification column 1, the working area B between the top of the rectification inlet 13 and the top of the working area B forms a rectification section, and the height of the rectification section is H1. The working area B between the bottom of the rectification inlet 13 and the bottom of the working area B forms a stripping section, and the height of the stripping section is H2.

[0049] When the rectification material containing substance C and substance D enters the second spring 14 hose, it is continuously heated and evaporated upward along the feed channel A in the second spring 14 hose, reaches the position of the sliding plate 9 to block the upward movement of the material. The rectification material enters the working area B of the rectification column 1 radially through the rectification inlet 13. The working area B is a tray or packing area. The light-phase substance C with a low boiling point in the rectification material passes through the rectification section with a height of H1 and is distilled out. The heavy-phase substance D with a high boiling point passes through the stripping section with a height of H2 and descends, and is taken out from the lower part of the rectification column 1.

[0050] In order to find the most economical rectification inlet 13 position, rectifying section height H1, and stripping section height H2, during the rectification process, the rotation of the drum 6 is adjusted by controlling the start and stop of the motor to change the rectifying section height H1 and stripping section height H2, and after the change, a rectification test is carried out to determine the most suitable feed position of the material to be separated, improve the product purity, and at the same time, the multi - use economy of the rectifying column with an adjustable feed position can also be improved.

[0051] In addition, as Figures 1 - 5 shown, a working method of a rectifying column with an adjustable feed position is given, using the rectifying column with an adjustable feed position as in Embodiment 1.

[0052] The rectifying column 1 is installed in the tower body, the adjusting pipe 2 is connected to the material supply pipe, and the material supply pipe supplies the material to be rectified into the adjusting pipe 2;

[0053] The material flows in the adjusting pipe 2 and is radially input into the working area B from the rectification inlet 13 position. The light - phase substances in the material rise axially along the working area B and evaporate, and the heavy - phase substances in the material move axially downward along the working area B to achieve rectification;

[0054] When adjusting the parameters of the rectification inlet 13, the pulling assembly drives the sliding plate 9 and / or the mesh plate 10 to move, and the elastic hose elongates or compresses, so that the position of the sliding plate 9 and / or the mesh plate 10 relative to the adjusting pipe 2 changes, and the position and / or axial length of the rectification inlet 13 are adjusted;

[0055] After adjusting the parameters of the rectification inlet 13, continue the rectification until the relative proportion of the material to be separated meets the set requirements.

[0056] Among them, the positions of the sliding plate 9 and the mesh plate 10 relative to the adjusting pipe 2 can be changed separately by adjusting the pulling assembly, or the positions of the sliding plate 9 and the mesh plate 10 relative to the adjusting pipe 2 can be changed simultaneously.

[0057] The elastic hose isolates the working area B at its covered position from the inside of the adjusting pipe 2, so that the material is input into the working area B from the rectification inlet 13 position.

[0058] In this embodiment, taking a 2 - meter - high packing column arranged in the tower body as an example, 316L θ - rings (1 cm) are used as packing, and the purification of N - vinylcaprolactam is taken as an example for illustration.

[0059] Example 1: In the substance to be separated, N-vinylcaprolactam accounts for 70%, inhibitor A accounts for 5%, and the catalyst accounts for 25%. First, place the mixture in the tower kettle for vacuum heating. The vacuum degree is 800 Pa. Pump it into the lower input port of the regulating pipe 2 by a diaphragm pump and transport it through the feed channel A. The height of H2 is 1 meter, and the height of H1 is 1 meter. Set the reflux ratio to 1:1. When distillate is produced, sample at any time. The proportion of N-vinylcaprolactam is 99.5%. As the content of N-vinylcaprolactam in the tower kettle decreases, change the position of the rectification inlet 13. The height of H2 is 1.2 meters, and the height of H1 is 0.8 meter. Continue purification to keep the purity of N-vinylcaprolactam still 99.5%. Detect at any time. After the proportion of N-vinylcaprolactam in the tower kettle is lower than 5%, discharge the bottom material and continue the rectification of a new batch.

[0060] Example 2: In the substance to be separated, N-vinylcaprolactam accounts for 80%, inhibitor A accounts for 5%, and the catalyst accounts for 25%. First, place the mixture in the tower kettle for vacuum heating. The vacuum degree is 800 Pa. Pump it into the lower input port of the regulating pipe 2 by a diaphragm pump and transport it through the feed channel A. The height of H2 is 0.8 meter, and the height of H1 is 1.2 meters. Set the reflux ratio to 1:1. When distillate is produced, sample at any time. The proportion of N-vinylcaprolactam is 99.5%. As the content of N-vinylcaprolactam in the tower kettle decreases, change the position of the rectification inlet 13. The height of H2 is 1 meter, and the height of H1 is 1 meter. Continue purification to keep the purity of N-vinylcaprolactam still 99.5%. Detect at any time. After the proportion of N-vinylcaprolactam in the tower kettle is lower than 5%, discharge the bottom material and continue the rectification of a new batch.

[0061] Example 3: In the substance to be separated, N-vinylcaprolactam accounts for 90%, inhibitor A accounts for 5%, and the catalyst accounts for 5%. First, place the mixture in the tower kettle for vacuum heating. The vacuum degree is 800 Pa. Pump it into the lower input port of the regulating pipe 2 by a diaphragm pump and transport it through the feed channel A. The height of H2 is 0.6 meter, and the height of H1 is 1.4 meters. Set the reflux ratio to 1:1. When distillate is produced, sample at any time. The proportion of N-vinylcaprolactam is 99.5%. As the content of N-vinylcaprolactam in the tower kettle decreases, change the position of the rectification inlet 13. The height of H2 is 0.8 meter, and the height of H1 is 1.2 meters. Continue purification to keep the purity of N-vinylcaprolactam still 99.5%. Detect at any time. After the proportion of N-vinylcaprolactam in the tower kettle is lower than 5%, discharge the bottom material and continue the rectification of a new batch.

[0062] In this embodiment, the working method of the rectification column with adjustable feed position can be used to purify mixtures with various boiling points by the rectification column with adjustable feed position, and can be achieved by combining the change of the position of the rectification inlet 13, that is, the change of the heights of H1 and H2, and the change of the distillation temperature.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A distillation tower with adjustable feed position, characterized in that: The invention comprises a tower body and a distillation column installed in the tower body, wherein an adjusting tube is arranged along the axis line in the distillation column, the side wall of the adjusting tube is a perforated plate, and the outside is an annular working area; two sections of elastic hoses are arranged in sequence along the axial direction in the adjusting tube, the side wall of the elastic hose is fitted with the inner wall of the perforated plate to seal the perforated plate in the fitted position, and an annular distillation inlet is formed between the two sections of the elastic hoses, one end of one section of the elastic hose close to the distillation inlet is sealed by a slide plate, and the other end of the elastic hose close to the distillation inlet is installed with a mesh plate, the slide plate and the mesh plate are connected with a pulling assembly, and the pulling assembly can drive the slide plate and the mesh plate to move to adjust the position of the distillation inlet.

2. The distillation tower with adjustable feed position according to claim 1, characterized in that: The other end of the elastic hose connected to the slide plate extends to one end of the adjusting tube and is fixed, and the other end of the elastic hose connected to the mesh plate extends to the other end of the adjusting tube and is fixed. The pulling assembly drives the slide plate and the mesh plate to move axially to adjust the distance between the slide plate and the mesh plate and / or the position of the adjusting tube.

3. The distillation tower with adjustable feed position according to claim 2, characterized in that: The mesh plate and the slide plate are connected via a connecting rod and are synchronously driven by the pulling assembly.

4. The distillation tower with adjustable feed position according to claim 2, characterized in that: A feed channel is formed inside the elastic hose connected to the mesh plate, and the feed channel passes through the mesh plate and is connected to the distillation inlet.

5. The distillation tower with adjustable feed position according to claim 1, characterized in that: The pulling assembly includes a driving member and a reel, a flexible rope is wound on the reel, one end of the flexible rope released by the reel is connected to a slide plate or a mesh plate, and the output end of the driving member is connected to the reel. When the reel is driven by the driving member, the flexible rope drives the slide plate or the mesh plate to move axially along the adjusting tube.

6. The distillation tower with adjustable feed position according to claim 5, characterized in that: The slide plate and the mesh plate are respectively connected with a pulling assembly, the reel is located outside the elastic hose, and the flexible rope passes through the elastic hose to connect the slide plate or the mesh plate.

7. The distillation tower with adjustable feed position according to claim 1, characterized in that: The elastic hose comprises a flexible wall and a spring. The flexible wall is arranged annularly around the spring and connected to the spring, so that the elastic hose forms a cylindrical structure.

8. The distillation tower with adjustable feed position according to claim 1, characterized in that: In the axial direction of the distillation column, the working area between the top of the distillation inlet and the top of the working area forms a distillation section, and the working area between the bottom of the distillation inlet and the bottom of the working area forms a stripping section.

9. The distillation tower with adjustable feed position according to claim 1, characterized in that: The mesh plate is provided with through holes in an array.

10. The distillation tower with adjustable feed position according to claim 1, characterized in that: The regulating tube can be detachably fixed to the distillation column.

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