Rectification device

Abstract

The invention relates to the technical field of chemical separation, and discloses a rectification device. The rectification device comprises a first rectification tower, the first rectification tower at least comprises a first tower kettle and a first tower body, and the side wall of the first tower body is provided with a discharge port extending along the axial direction of the first tower body; one end of the discharge pipe is communicated with the first tower body through the discharge port and can move up and down along the discharge port; and the sealing mechanism is arranged to be capable of sealing the rest part of the discharge port along with the up-down movement of one end of the discharge pipe. The rectification device can flexibly and accurately adjust the position of the side extraction port, so that the composition of the side extraction product is accurately controlled under the condition of not changing the process condition, the process window of the rectification process is expanded, and the difficulty of obtaining products with different compositions is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of chemical separation, and in particular to a rectification device. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. It uses the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, to transfer the light components (low-boiling substances) in the liquid phase to the gas phase, and the heavy components (high-boiling substances) in the gas phase to the liquid phase, thereby achieving the purpose of separation. In the field of chemical separation technology, the distillation tower is one of the core equipment.

[0003] A distillation tower can separate two components, and two products of different components can be obtained in the bottom and top of the tower. In practical applications, a side-line extraction can be used for the distillation tower, that is, the side-line extraction product can be obtained by intercepting the material on each plate of the distillation tower to obtain more products of different components. Each plate corresponds to different components and different side-line extractions. The components of the side-line extraction products are closely related to the position of the side-line extraction port. For example, the closer the side-line extraction port is to the top of the tower, the higher the proportion of light components in the extracted product, and the closer the side-line extraction port is to the bottom of the tower, the higher the proportion of heavy components in the extracted product. In engineering, the tower body of the distillation tower is generally constructed to set the position and number of the side-line extraction ports. In view of the high cost of renovation construction, or the inability to set more side-line extraction ports in actual application scenarios, the number of side-line extraction ports is usually no more than 4. When the position of the side-line extraction port is fixed and the number is small, it is difficult to accurately control the components of the side-line extraction product. In the prior art, in order to obtain the product of the expected components at the side line outlet, the process parameters need to be precisely controlled, which undoubtedly reduces the process window of the distillation process and thus reduces the quality of the product. In addition, the purity of the side line product usually has an upper limit and cannot meet the high purity requirements.

[0004] For example, Chinese patent document CN104492176A discloses a vacuum intermittent distillation process and device for purifying peach aldehyde by side-line extraction. The invention uses vacuum intermittent distillation to set two sets of process conditions during distillation, change the product composition of the two side-line extraction ports on the distillation tower, and obtain peach aldehyde products of the expected components. The invention can reduce the operation time, reduce energy consumption, and improve product yield. However, in the invention, it is necessary to accurately control the process conditions to obtain qualified products in the side line, resulting in a smaller process window for the distillation process; at the same time, since the side line discharge port is fixed at a low point and a high point respectively, there is an upper limit to the purity of the side line extraction product. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem in the prior art that it is difficult to accurately control the composition of the side line production product.

[0006] In order to achieve the above object, the present invention provides a distillation device, which at least comprises:

[0007] A first distillation tower, the first distillation tower at least comprising a first tower still and a first tower body, a side wall of the first tower body being provided with a discharge port extending along the axial direction of the first tower body;

[0008] a discharge pipe, one end of which is connected to the first tower body through the discharge port and can move up and down along the discharge port; and

[0009] The sealing mechanism is configured to seal the rest of the discharge port as one end of the discharge pipe moves up and down.

[0010] Preferably, one end of the discharge pipe is connected to the discharge port through a slide rail mechanism, the slide rail mechanism includes two slide rails respectively arranged on both sides of the discharge port and extending along the axial direction of the first tower body, and one end of the discharge pipe is slidably connected to the two slide rails.

[0011] Preferably, the sealing mechanism includes an upper roll plate, a lower roll plate, an upper plate storage device and a lower plate storage device, the upper roll plate and the lower roll plate are slidably connected between the two slide rails and clamp the discharge pipe from above and below respectively; the upper end of the upper roll plate and the lower end of the lower roll plate are respectively wound and stored in the upper plate storage device and the lower plate storage device, and the upper plate storage device and the lower plate storage device fix the two ends of the slide rail mechanism and form a seal for the two ends.

[0012] Preferably, an upper buckle and a lower buckle are provided on the side of the discharge pipe; the upper roll plate and the lower roll plate are respectively engaged with the upper buckle and the lower buckle to achieve clamping of the discharge pipe.

[0013] Preferably, the first distillation tower also includes a first condenser, a first reflux device and a storage tank. The storage tank is connected to the first tower body and is used to introduce the material to be separated into the first tower body. The first condenser is used to collect and condense the components separated from the top of the first tower body. The first reflux device is used to reflux the components into the first tower body or extract them as products.

[0014] Preferably, the distillation device further comprises a second distillation tower, which comprises at least a second tower bottom and a second tower body, and the other end of the discharge pipe is fixedly connected to the second tower bottom; the second distillation tower is used to collect and purify the side line extraction product of the first distillation tower.

[0015] Preferably, the second distillation tower further comprises a second condenser and a second reflux device, the second condenser is used to collect and condense the components separated from the top of the second tower body, and the second reflux device is used to reflux the components into the second tower body or withdraw them as products.

[0016] Preferably, a lifting mechanism is installed at the bottom of the second tower kettle, and the lifting mechanism is used to adjust the height of the second distillation tower and drive one end of the discharge pipe to move up and down along the discharge port.

[0017] Preferably, the discharge pipe is a rigid pipe.

[0018] Preferably, the side walls on both sides of the discharge port are provided with scales, and the scales are used to indicate the position of one end of the discharge pipe.

[0019] Through the above technical solution, the beneficial effects of the present invention are as follows:

[0020] The present invention provides a distillation device, wherein the side wall of the first tower body is provided with a discharge port extending along the axial direction of the first tower body, one end of the discharge pipe is connected to the first tower body through the discharge port and can move up and down along the discharge port, and a sealing device can keep the discharge port sealed when one end of the discharge pipe moves up and down. The distillation device can realize flexible and precise adjustment of the position of the side line extraction port, thereby accurately controlling the composition of the side line extraction product without changing the process conditions, thereby expanding the process window of the distillation process and reducing the difficulty of obtaining products with different compositions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a distillation device in one embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view of a slide rail mechanism in one embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of a combined structure of a slide rail mechanism and a discharge pipe in one embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of the exploded structure of the slide rail mechanism and the discharge pipe in one embodiment of the present invention;

[0025] The following are the descriptions of the reference numerals:

[0026] 1-first distillation tower; 11-first tower bottom; 12-first tower body; 121-side wall of first tower body; 122-discharge port; 13-first condenser; 14-first reflux device; 15-storage tank;

[0027] 2-second distillation tower; 21-second tower kettle; 22-second tower body; 23-second condenser; 24-second reflux device; 25-lifting mechanism;

[0028] 3-discharging pipe; 31-upper buckle; 32-lower buckle; 33-tube body;

[0029] 4-sealing mechanism; 41-upper roll plate; 42-lower roll plate; 43-upper plate storage device; 44-lower plate storage device;

[0030] 5-slide rail mechanism; 51-slide rail. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the said features.

[0034] In the description of the present invention, it is necessary to understand that the directional terms are based on the orientation of the distillation device. For example, the terms "up, down, left, right" refer to the up, down, left and right directions of the distillation device. The orientation or position relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] The present invention provides a distillation device, such as Figure 1 As shown, the distillation device at least comprises:

[0036] A first distillation tower 1, the first distillation tower 1 at least comprises a first tower bottom 11 and a first tower body 12, a side wall 121 of the first tower body 12 is provided with a discharge port 122 extending along the axial direction of the first tower body 12;

[0037] A discharge pipe 3, one end of which is connected to the first tower body 12 through a discharge port 122 and can move up and down along the discharge port 122; and

[0038] The sealing mechanism is configured to seal the rest of the discharge port 122 as one end of the discharge pipe 3 moves up and down.

[0039] See also Figure 1-Figure 4In one embodiment, one end of the discharge pipe 3 is connected to the discharge port 122 through a slide rail mechanism 5. The slide rail mechanism 5 includes two slide rails 51 respectively arranged on both sides of the discharge port 122 and extending along the axial direction of the first tower body 12. One end of the discharge pipe 3 is slidably connected to the two slide rails 51. The two slide rails can be arranged on the outer surface of the side wall 121. One end of the discharge pipe 3 forms a dynamic sealing contact with the side surfaces of the two slide rails 51, that is, the two maintain a sealed contact when sliding relative to each other. As a preferred embodiment, the dynamic sealing contact is achieved by a seal between the two. The seal can be a rubber gasket, and the elasticity of the rubber gasket is used to improve the effect of the dynamic seal. The discharge port 122 is the side line extraction port of the first distillation tower 1. By setting the slide rail mechanism 5, the distillation device can flexibly and accurately adjust and control the position of the side line extraction port, thereby accurately controlling the composition of the side line extraction product without changing the process conditions, reducing the difficulty of obtaining products with different compositions, and is particularly suitable for occasions where multiple purity products are required.

[0040] Further, the sealing mechanism includes an upper coil 41, a lower coil 42, an upper plate storage device 43 and a lower plate storage device 44. The upper coil 41 and the lower coil 42 are slidably connected between the two slide rails 51 and clamp the discharge pipe from the top and bottom of the discharge pipe respectively; the upper end of the upper coil 41 and the lower end of the lower coil 42 are respectively wound and stored in the upper plate storage device 43 and the lower plate storage device 44, and the upper plate storage device 43 and the lower plate storage device 44 are fixed to the two ends of the slide rail mechanism 5 and form a seal on the two ends. Specifically, the upper coil 41 and the lower coil 42 are in sealing contact with the two slide rails 51. The upper plate storage device 43 is in sealing contact with the upper end surfaces of the two slide rails 51, and the lower plate storage device 44 is in sealing contact with the lower end surfaces of the two slide rails 51. At the same time, the upper plate storage device 43 and the lower plate storage device 44 are also in sealing contact with the side wall 121. Furthermore, the above-mentioned sealing contacts can be realized by direct interference fit, and can also be realized with the assistance of a seal. The material of the upper roll plate 41 and the lower roll plate 42 includes a thin steel plate with bending properties. The upper end of the upper roll plate 41 and the lower end of the lower roll plate 42 are respectively stored in the form of winding on the horizontal axis of the upper plate storage device 43 and the lower plate storage device 44, and the upper end of the upper roll plate 41 and the lower end of the lower roll plate 42 can be pulled to a specified position on the slide rail 51 according to demand.

[0041] Furthermore, the discharge pipe 3 includes a tube body 33 and an upper buckle 31 and a lower buckle 32 arranged on the side of the tube body 33; the upper coil 41 and the lower coil 42 are respectively connected with the upper buckle 31 and the lower buckle 32 to clamp the discharge pipe 3 and ensure that the joint surface between the upper coil 41 and the lower coil 42 and the discharge pipe 3 is sealed. The tube body 33 is preferably a square tube, that is, the cross section of the outer wall of the discharge pipe 3 is rectangular, so that the discharge pipe 3 and the slide rail 51 can be in close contact to form a seal. The upper buckle 31 and the lower buckle 32 are "door" shaped. When the coil is inserted into the "door" buckle, the coil can be clamped on both sides of the buckle by twisting the buckle knob.

[0042] Please continue reading Figure 1 In one embodiment, the first distillation tower 1 further comprises a first condenser 13, a first reflux 14 and a storage tank 15. The storage tank 15 is connected to the first tower body 12 and is used to pass the material to be separated into the first tower body 12. The first condenser 13 is used to collect and condense the components separated from the top of the first tower body 12. The first reflux 14 is used to reflux the components into the first tower body 12 or extract them as products. The storage tank 15 can be connected to the first tower body 12 through a pipeline, and a power pump can be installed on the pipeline, and the power pump pumps the material in the storage tank 15 into the first tower body 12. The first condenser 13 is connected to the top of the first tower body 12, the first reflux 14 is connected to the first condenser 13, and the first reflux pipeline and the first top extraction pipeline are arranged on the first reflux pipeline. The first reflux pipeline is connected to the top of the first tower body 12, and some components are refluxed into the first tower body 12 through the first reflux pipeline, and other components are extracted through the first top extraction pipeline. The first distillation tower 1 can distill the material, extract the light component product from the top of the tower, and send out the side line product from the discharge port 122.

[0043] Please continue reading Figure 1 In one embodiment, the distillation device further comprises a second distillation tower 2, which comprises at least a second tower bottom 21 and a second tower body 22, and the other end of the discharge pipe 3 is fixedly connected to the second tower bottom 21; the second distillation tower 2 is used to collect and purify the side-line extraction product of the first distillation tower 1 through the discharge pipe 3. The second distillation tower 2 can continue to perform distillation and purification on the collected side-line extraction product, thereby obtaining a side-line extraction product of a high-purity component, so that the product meets the requirements of high-purity fine separation.

[0044] Further, the second distillation tower 2 also includes a second condenser 23 and a second reflux 24, the second condenser 23 is used to collect and condense the components separated from the top of the second distillation tower 2, and the second reflux 24 is used to reflux the components into the second tower body 22 or extract them as products. The second condenser 23 is connected to the top of the second tower body 22, the second reflux 24 is connected to the second condenser 23, and the second reflux line 24 is provided with a second reflux line and a second top extraction line, the second reflux line is connected to the top of the second tower body 22, and some components are refluxed into the second tower body 22 through the second reflux line, and another part of the components are extracted through the second top extraction line. The second tower reactor 21 can also be provided with a tower reactor discharge port to timely extract the side line extraction product that meets the expectations. Further, the first tower reactor 11 and the second tower reactor 21 are both provided with a heating device, and the heating device vaporizes the light component material low-boiling substances in the tower reactor by heating and then separates them from the tower reactor material.

[0045] Please continue reading Figure 1In one embodiment, a lifting mechanism 25 is installed at the bottom of the second tower reactor 21, and the lifting mechanism 25 is used to adjust the height of the second distillation tower 2 and drive one end of the discharge pipe 3 to move up and down along the discharge port 122. The lifting mechanism 25 may include a lifting bracket or a lifting platform, which can accurately adjust and control the height of the second distillation tower 2. Furthermore, the discharge pipe 3 is a rigid tube, such as a rigid metal tube or a glass tube. While the lifting mechanism 25 adjusts the height of the second distillation tower 2, it drives both ends of the rigid discharge pipe 3 to move up and down synchronously, thereby realizing accurate control of the position of the side line extraction port. The side walls 121 on both sides of the discharge port 122 can also be provided with a scale, which is used to indicate the position of one end of the discharge pipe 3 moving up and down along the discharge port 122, thereby improving the control accuracy of the side line extraction port position. In other embodiments, the discharge pipe 3 may be a hose, for example, a hose with good softness and flexibility, which can ensure that when adjusting the position of one end of the discharge pipe 3, there is no need to adjust the position of the other end of the discharge pipe 3, and further, there is no need to adjust the height of the second distillation tower 2. Further, the end of the discharge pipe 3 that moves up and down along the discharge port 122 is not lower than the other end thereof, so as to ensure that the discharge pipe 3 can smoothly deliver the side line product into the second tower reactor 21. A control valve may be provided on the discharge pipe 3 to control the connection state between the first distillation tower 1 and the second distillation tower 2.

[0046] In one embodiment, the parameters of the distillation device include: the volume of the first tower bottom 11 is 1000ml-2500ml, the volume of the second tower bottom 21 is 500ml-1000ml, the height of the first tower body 12 is 1000mm-2000mm, the height of the second tower body 22 is 800mm-1500mm, the length of the discharge pipe 3 is 200mm-400mm, the length of the two slide rails 51 is 800mm-1600mm, the width between the two slide rails 51 is 5mm-20mm, and the length of the upper roll plate 41 and the lower roll plate 42 is 400mm-800mm. The above parameters are set with reference to conventional distillation towers. In this way, the distillation device can be obtained by modifying and constructing a conventional distillation tower, and the distillation device can also be conveniently used in conjunction with a conventional distillation tower to improve the compatibility of the distillation device. The preferred values ​​of some parameters of the distillation device are given above, but the parameters of the distillation device are not limited thereto.

[0047] The above-mentioned distillation device can flexibly and accurately adjust and control the position of the side line extraction port, and continue to distill the side line extraction product. Its working principle is as follows: first, adjust the lifting mechanism 25 and drive one end of the rigid discharge pipe 3 to slide along the slide rail mechanism 5 to a predetermined position; then pull the upper roll plate 41 and the lower roll plate 42 respectively and make them close to the upper and lower sides of the discharge pipe 3 respectively, and use the upper buckle 31 and the lower buckle 32 to fix the upper roll plate 41 and the lower roll plate 42 respectively to achieve the fixation of this end and the sealing of the discharge port 122; then input raw materials into the first tower reactor 11, carry out the first distillation process in the first distillation tower 1, and the side line extraction product enters the second tower reactor 21 through the discharge pipe 3 and is collected; finally, according to demand, the product collected in the second tower reactor 21 is subjected to a second distillation process in the second distillation tower 2 to obtain a high-purity product.

[0048] In summary, the present invention provides a distillation device, wherein the side wall of the first tower body is provided with a discharge port extending along the axial direction of the first tower body, one end of the discharge pipe is connected to the first tower body through the discharge port and can move up and down along the discharge port, and the sealing device can keep the discharge port sealed when one end of the discharge pipe moves up and down. The distillation device can realize flexible and precise adjustment of the position of the side line extraction port, so as to accurately control the composition of the side line extraction product without changing the process conditions, thereby expanding the process window of the distillation process and reducing the difficulty of obtaining products with different compositions. Furthermore, the distillation device can also include a second distillation tower connected to the other end of the discharge pipe, and the second distillation tower is used to collect the side line extraction product of the first distillation tower through the discharge pipe and distill and purify the product, so as to obtain a side line extraction product of a high-purity component, so that the product meets the requirements of high-purity fine separation.

[0049] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A distillation device, characterized in that: At least: A first distillation tower (1), the first distillation tower (1) comprising at least a first tower bottom (11) and a first tower body (12), a side wall (121) of the first tower body (12) being provided with a discharge port (122) extending along the axial direction of the first tower body (12); a discharge pipe (3), one end of which is connected to the first tower body (12) through the discharge port (122) and is capable of moving up and down along the discharge port (122); and A sealing mechanism (4), wherein the sealing mechanism (4) is configured to seal the remaining portion of the discharge port (122) as one end of the discharge pipe (3) moves up and down.

2. The distillation device according to claim 1, characterized in that: One end of the discharge pipe (3) is connected to the discharge port (122) via a slide rail mechanism (5), the slide rail mechanism (5) comprising two slide rails (51) respectively arranged on both sides of the discharge port (122) and extending along the axial direction of the first tower body (12), and one end of the discharge pipe (3) is slidably connected to the two slide rails (51).

3. The distillation device according to claim 2, characterized in that: The sealing mechanism (4) comprises an upper coil (41), a lower coil (42), an upper plate storage device (43) and a lower plate storage device (44); the upper coil (41) and the lower coil (42) are slidably connected between the two slide rails (51) and clamp the discharge pipe (3) from the top and bottom of the discharge pipe (3) respectively; the upper end of the upper coil (41) and the lower end of the lower coil (42) are respectively wound and stored in the upper plate storage device (43) and the lower plate storage device (44); the upper plate storage device (43) and the lower plate storage device (44) are fixed to the two ends of the slide rail mechanism (5) and form a seal on the two ends.

4. The distillation device according to claim 3, characterized in that: An upper buckle (31) and a lower buckle (32) are provided on the side of the discharge pipe (3); the upper roll plate (41) and the lower roll plate (42) are respectively engaged with the upper buckle (31) and the lower buckle (32) to achieve clamping of the discharge pipe (3).

5. The distillation device according to claim 1, characterized in that: The first distillation tower (1) further comprises a first condenser (13), a first reflux device (14) and a storage tank (15); the storage tank (15) is connected to the first tower body (12) and is used to introduce the material to be separated into the first tower body (12); the first condenser (13) is used to collect and condense the components separated from the top of the first tower body (12); the first reflux device (14) is used to reflux the components into the first tower body (12) or to extract them as products.

6. The distillation device according to any one of claims 1 to 5, characterized in that: The distillation device further comprises a second distillation tower (2), the second distillation tower (2) comprising at least a second tower bottom (21) and a second tower body (22), the other end of the discharge pipe (3) being fixedly connected to the second tower bottom (21); the second distillation tower (2) is used to collect and purify the side-line extraction product of the first distillation tower (1).

7. The distillation device according to claim 6, characterized in that: The second distillation tower (2) further comprises a second condenser (23) and a second reflux device (24), wherein the second condenser (23) is used to collect and condense the components separated from the top of the second tower body (22), and the second reflux device (24) is used to reflux the components into the second tower body (22) or to extract them as products.

8. The distillation device according to claim 6, characterized in that: A lifting mechanism (25) is installed at the bottom of the second tower kettle (21), and the lifting mechanism (25) is used to adjust the height of the second distillation tower (2) and drive one end of the discharge pipe (3) to move up and down along the discharge port (122).

9. The distillation device according to claim 8, characterized in that: The discharge pipe (3) is a rigid pipe.

10. The distillation device according to claim 8, characterized in that: The side walls (121) on both sides of the discharge port (122) are provided with scales, and the scales are used to indicate the position of one end of the discharge pipe (3).

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