A plate fractionating column

Abstract

The utility model discloses a plate type fractional distillation column, including tower body, the top fixed connection of tower body has upper head, the top intercommunication of upper head has the gas pipe, the inside fixed connection of tower body has the tower plate, and the surface of tower plate is equipped with the vent hole, and the plate type fractional distillation column still includes adjusting device, and adjusting device sets up in the top of tower plate, the outer wall of protection device sets up in tower body, and the inside device of liquid removal sets up in tower body. The utility model relates to the technical field of fractional distillation column, and the plate type fractional distillation column, through the cooperation of guide vane, stop plate, adjusting plate and limit block, the opening angle of the inclined hole on the tower plate is adjusted, the opening angle of the inclined hole on the inclined hole tower plate in the inside of traditional plate type fractional distillation column is almost unadjustable in actual use, and when gas pressure changes, the inclined hole tower plate with fixed opening angle can cause unstable gas-liquid contact state, and the problem of affecting mass transfer efficiency is solved.

Description

Technical Field

[0001] This utility model relates to the field of fractionation tower technology, specifically a plate fractionation tower. Background Technology

[0002] Plate towers are a type of staged contact mass transfer device used in gas-liquid or liquid-liquid systems. They consist of a cylindrical tower body and several trays horizontally installed at certain intervals inside the tower.

[0003] In traditional plate distillation columns, the mixture to be separated enters the interior of the column. Through multiple mass and heat transfer processes on the internal plates, the lighter components gradually accumulate at the top of the column, while the heavier components accumulate at the bottom, thus achieving the separation of the mixture.

[0004] However, in actual use, the opening angle of the inclined holes on the inclined plate inside the traditional plate distillation column is almost fixed. When the gas pressure changes, the inclined plate with a fixed opening angle may cause the gas-liquid contact state to be unstable, affecting the mass transfer efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a plate distillation column that solves the problem that, in practical use, the opening angle of the inclined holes on the inclined plate inside a traditional plate distillation column is almost fixed. When the gas pressure changes, the inclined plate with a fixed opening angle may cause unstable gas-liquid contact and affect mass transfer efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plate distillation column, comprising a column body, an upper end cap fixedly connected to the top of the column body, an outlet pipe connected to the top of the upper end cap, a column plate fixedly connected inside the column body, and ventilation holes provided on the surface of the column plate. The plate distillation column also includes an adjusting device located at the top of the column plate; a protective device located on the outer wall of the column body; and a liquid removal device located inside the column body. The adjusting device adjusts the opening angle of the ventilation holes, the protective device protects the screws on the outer wall of the upper end cap, and the liquid removal device removes foam from the interior of the column body.

[0007] Preferably, the regulating device includes multiple guide blocks, all fixedly connected to the top of the tray; multiple limiting plates, respectively located on the front and rear sides of each guide block, with their bottoms fixedly connected to the top of the tray; an regulating plate corresponding to each guide block, and rotatably connected between two limiting plates via a pin; multiple limiting blocks, respectively fixedly connected to the front and rear sides of each regulating plate, and slidably connected to the outer wall grooves on adjacent sides of the two limiting plates; wherein, the guide blocks guide the liquid flow, and the cooperation of the limiting plates, regulating plates, and limiting blocks achieves the purpose of adjusting the opening angle of the vent holes on the tray.

[0008] Preferably, a base is fixedly connected to the bottom of the tower body, a reflux pipe is connected to the outer wall of the tower body, a feed pipe located below the reflux pipe is connected to the outer wall of the tower body, an air inlet pipe located below the feed pipe is connected to the outer wall of the tower body, and a discharge pipe is connected to the bottom of the tower body, with the end of the discharge pipe penetrating through the outer wall of the base.

[0009] Preferably, the protective device includes a fixing seat, which is fixedly connected to the upper outer wall of the tower body; a protective cover is fitted onto the outer wall of the upper end cap and extends to the upper outer wall of the tower body; two bolts are provided and are arranged symmetrically, one bolt is threaded to the inner wall of the fixing seat and the other bolt is threaded to the inner wall of the protective cover; a connecting column is fixedly connected between the two bolts; wherein, through the cooperation of the fixing seat, bolts and connecting column, the protective cover is fixed above the screw on the outer wall of the upper end cap.

[0010] Preferably, the outer wall of the connecting column is rotatably connected to a limit rod via a sealed bearing, and the outer wall of the limit rod is slidably engaged with a groove, the top of which is fixedly connected to the outer wall of the tower body.

[0011] Preferably, the liquid removal device includes a mounting base, which is fixedly connected to the upper inner wall of the tower body; a wire mesh demister is attached to the inner wall of the mounting base; and a mounting ring is fixedly connected to the top of the mounting base, with its bottom attached to the top of the wire mesh demister; wherein, through the cooperation of the mounting base and the mounting ring, the purpose of quickly replacing the wire mesh demister is achieved.

[0012] Preferably, a liquid receiving tray is fixedly connected to one side of the tray, the outer wall of the liquid receiving tray away from the tray is fixedly connected to the inner wall of the tower body, a downcomer is fixedly connected to the outer wall of the tray away from the liquid receiving tray, the outer wall of the downcomer away from the tray is fixedly connected to the inner wall of the tower body, and a buffer plate is fixedly connected to the inner wall of the downcomer.

[0013] Beneficial effects

[0014] This invention provides a plate distillation column. It offers the following advantages: This plate distillation column, through the cooperation of a guide block, a limiting plate, an adjusting plate, and a limiting block, allows for adjustment of the opening angle of the inclined holes on the column plate. This solves the problem that in practical use, the opening angle of the inclined holes on the inclined plate inside a traditional plate distillation column is almost fixed. Furthermore, when gas pressure changes, a fixed opening angle on an inclined plate can lead to unstable gas-liquid contact, affecting mass transfer efficiency.

[0015] By using a combination of mounting base, bolts, connecting columns, and protective covers, the screws between the upper end cap and the tower body are protected and fixed. This solves the problem that traditional plate distillation towers often use bolts to fix the upper end cap, which, after a period of time, may be difficult to remove due to special weather conditions when it is necessary to inspect the inside of the plate distillation tower, thus affecting the inspection progress. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the appearance of the present utility model;

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the middle tray, liquid receiving plate and downcomer;

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the guide block, limiting plate and adjusting plate;

[0020] Figure 5 for Figure 1 A structural schematic diagram of the central fixing seat, bolts, and connecting column;

[0021] Figure 6 for Figure 1 A schematic diagram of the structure of the mounting base, wire mesh demister, and mounting ring.

[0022] In the diagram: 1. Tower body; 11. Reflux pipe; 12. Feed pipe; 13. Air inlet pipe; 14. Discharge pipe; 2. Upper end cap; 21. Air outlet pipe; 3. Tower plate; 31. Vent hole; 4. Adjusting device; 41. Guide block; 42. Limiting plate; 43. Adjusting plate; 44. Limiting block; 5. Liquid receiving tray; 6. Downcomer; 61. Buffer plate; 7. Protective device; 71. Fixing seat; 72. Bolt; 73. Connecting column; 731. Limiting rod; 732. Slide groove; 74. Protective cover; 8. Liquid removal device; 81. Mounting seat; 82. Wire mesh demister; 83. Mounting ring; 9. Base. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In practical applications, the opening angle of the inclined holes on the inclined plate inside a traditional plate distillation column is almost fixed. When the gas pressure changes, the inclined plate with a fixed opening angle may cause the gas-liquid contact state to be unstable, affecting the mass transfer efficiency.

[0025] In view of this, the present invention provides a plate distillation column, which solves the problem that in actual use, the opening angle of the inclined holes on the inclined plate inside the traditional plate distillation column is almost fixed. When the gas pressure changes, the inclined plate with a fixed opening angle may cause unstable gas-liquid contact and affect the mass transfer efficiency.

[0026] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0027] Example 1: By Figure 1-6 It is known that a plate distillation column includes a column body 1, an upper end cap 2 fixedly connected to the top of the column body 1, an outlet pipe 21 connected to the top of the upper end cap 2, a column plate 3 fixedly connected inside the column body 1, and a vent hole 31 opened on the surface of the column plate 3. The plate distillation column also includes an adjusting device 4, a protective device 7, and a liquid removal device 8. The adjusting device 4 is located on the top of the column plate 3; the protective device 7 is located on the outer wall of the column body 1; and the liquid removal device 8 is located inside the column body 1. The adjusting device 4 adjusts the opening angle of the vent hole 31, the protective device 7 protects the screws on the outer wall of the upper end cap 2, and the liquid removal device 8 removes foam from the inside of the column body 1.

[0028] In the specific implementation process, it is worth noting that the tower body 1 is cylindrical and the top is fixedly connected with a flange. The material of the flange can be selected according to actual needs, such as stainless steel. The upper end cap 2 is frustum-shaped and the bottom is fixedly connected with a flange that matches the top of the tower body 1. The material of the upper end cap 2 can be the same as that of the tower body 1. The tower body 1 and the upper end cap 2 are fixed by multiple screws. The top vent pipe 21 is connected to the external condenser. The operator adjusts the opening angle of the vent 31 through the adjusting device 4. The screws on the outer wall of the upper end cap 2 are protected by the protective device 7. The internal foam of the tower body 1 is defoamed and separated by the liquid removal device 8.

[0029] Furthermore, the regulating device 4 includes a flow guide block 41, a limiting plate 42, an adjusting plate 43, and a limiting block 44. Multiple flow guide blocks 41 are provided, all fixedly connected to the top of the tray 3. Multiple limiting plates 42 are provided, respectively located on the front and rear sides of each flow guide block 41, and their bottoms are fixedly connected to the top of the tray 3. Adjusting plates 43 are provided corresponding to each flow guide block 41 and are rotatably connected between two limiting plates 42 via pins. Multiple limiting blocks 44 are provided, respectively fixedly connected to the front and rear sides of each adjusting plate 43, and slidably connected to the outer wall grooves on adjacent sides of two limiting plates 42. The flow guide block 41 guides the liquid flow, and the cooperation of the limiting plate 42, adjusting plate 43, and limiting block 44 achieves the purpose of adjusting the opening angle of the vent hole 31 on the tray 3.

[0030] In the specific implementation process, it is worth noting that the guide block 41 is generally shaped like an oblique quadrangular prism with a parallelogram cross-section, and the limiting plate 42 is generally shaped like a quadrangular prism with a square cross-section. Grooves are provided on adjacent sides of both limiting plates 42. The adjusting plate 43 is positioned between the two limiting plates 42 and can rotate via a pin. The limiting blocks 44 on the front and rear sides of the adjusting plate 43 are cylindrical, and the two limiting blocks 44 slide within the grooves on the two limiting plates 42. When the liquid flows to the surface of the tray 3, it is guided by the guide block 41 and then guided by the limiting plate 42 and the adjusting plate 43. In conjunction with the limiting block 44, the opening angle of the vent hole 31 on the tray 3 is adjusted. When the gas pressure is low, the opening angle of the inclined hole decreases, and the gas is ejected at a suitable speed and angle, which can make more sufficient contact and mixing with the liquid on the tray 3, increasing the gas-liquid contact area and time, and making the mass transfer process more complete. When the gas pressure increases, the opening angle of the inclined hole increases accordingly, and the gas ejection speed increases, which can update the gas-liquid interface in time, thereby improving the mass transfer efficiency of the plate distillation column. It is understood that when selecting the above-mentioned components, components made of appropriate materials can be selected according to actual needs.

[0031] Furthermore, a base 9 is fixedly connected to the bottom of the tower body 1, a return pipe 11 is connected to the outer wall of the tower body 1, a feed pipe 12 located below the return pipe 11 is connected to the outer wall of the tower body 1, an air inlet pipe 13 located below the feed pipe 12 is connected to the outer wall of the tower body 1, and a discharge pipe 14 is connected to the bottom of the tower body 1, with the end of the discharge pipe 14 penetrating through the outer wall of the base 9.

[0032] In the specific implementation process, it is worth noting that the base 9 is cylindrical and hollow inside, which supports the plate distillation tower. The reflux pipe 11 can be connected to the external reflux tank. The reflux pipe 11 is located above the uppermost tray 3 inside the tower body 1. The feed pipe 12 is connected to the external feed device and is located between the second and third trays 3. The gas inlet pipe 13 is located below the lowermost tray 3 inside the tower body 1. The gas inlet pipe 13 can be connected to the upstream gas inlet device and control the pressure of the gas entering the tower body 1. The number of trays 3 inside the tower body 1 can be increased or decreased according to actual needs, ensuring that from top to bottom, the order is reflux pipe 11, feed pipe 12, and gas inlet pipe 13. The discharge pipe 14 is connected to the external reboiler. It can be understood that when selecting the above connecting pipes, appropriate materials can be selected according to actual needs to meet the working requirements, thus ensuring the stability of the daily operation of the plate distillation tower.

[0033] Specifically, when the plate distillation column is put into use, the mixed liquid to be separated enters the column body 1 through the feed pipe 12. Under the action of gravity, the liquid first flows to the liquid receiving tray 5 on one side of the column plate 3. The liquid gradually fills the liquid receiving tray 5 and flows to the surface of the column plate 3. Under the guidance of the guide block 41, the liquid flows evenly on the column plate 3. At the same time, the gas to be separated, after preliminary treatment or compression, enters the column from the bottom of the column body 1 through the gas inlet pipe 13. Driven by the pressure difference, the gas begins to flow upward, preparing to contact the liquid on the column plate 3. The rising gas passes through the vent on the column plate 3. The gas enters the upper tray 3 through hole 31 and rises layer by layer until it contacts the liquid. When the gas pressure is low, the regulating plate 43, under its own weight and the combined action of the limiting block 44 and the groove of the limiting plate 42, maintains a small angle, resulting in a relatively small opening angle for the vent 31. The gas flows through the vent 31 at a low velocity, fully contacting the liquid on the tray 3 for mass and heat transfer. As the gas flow rate or pressure increases, the force exerted by the gas on the regulating plate 43 increases. The regulating plate 43 overcomes its own weight and the frictional force of the limiting block 44, rotating upwards via the pin shaft, allowing the gas to flow through the vent 31. The increased opening angle of the vent 31 allows gas to flow through it at a faster rate, while also ensuring the uniformity and stability of gas-liquid contact. After a period of time, the liquid gradually increases on the surface of the tray 3 until it exceeds the top of the downcomer 6 and flows into the downcomer 6. As the liquid passes through the buffer plate 61, it slows down and flows into the lower receiving tray 5, continuing to contact and transfer mass with the rising gas. It can be understood that on each tray 3, high-boiling-point components in the gas will partially condense and enter the liquid phase upon cooling, while low-boiling-point components in the liquid phase will partially vaporize and enter the gas phase upon heating. The mass and heat transfer between gas and liquid is achieved, so that the components in the mixture gradually separate in the gas and liquid phases. After multiple gas-liquid mass transfer and separation processes through multiple layers of trays 3, the concentration of low-boiling-point components in the gas phase above the tower body 1 gradually increases. The gas phase product above the tower body 1 enters the upper head 2 through the wire mesh demister 82, and then exits the tower body 1 from the gas outlet pipe 21 at the top of the upper head 2 for subsequent processing. After multiple mass transfers on the trays 3, the concentration of high-boiling-point components in the liquid phase inside the tower body 1 continuously increases. Finally, the liquid phase product at the bottom of the tower is discharged from the tower body 1 through the discharge pipe 14.

[0034] Example 2: From Figure 1-6It is known that the protective device 7 includes a fixing seat 71, bolts 72, connecting column 73, and protective cover 74. The fixing seat 71 is fixedly connected to the upper outer wall of the tower body 1; the protective cover 74 is sleeved on the outer wall of the upper end cap 2 and extends to the upper outer wall of the tower body 1; there are two bolts 72, which are arranged symmetrically on an axis. One bolt 72 is threaded to the inner wall of the fixing seat 71, and the other bolt 72 is threaded to the inner wall of the protective cover 74; the connecting column 73 is fixedly connected between the two bolts 72; wherein, through the cooperation of the fixing seat 71, bolts 72, and connecting column 73, the protective cover 74 is fixed above the screw on the outer wall of the upper end cap 2.

[0035] In the specific implementation process, it is worth noting that the fixing seat 71 is generally circular and is fixed on the upper part of the outer wall of the tower body 1. It has threaded holes in all four directions: front, back, left, and right. The bolts 72 can be selected to match the threaded holes. The connecting column 73 fixes the two bolts 72 on both sides of the connecting column 73 through the nuts of the bolts 72. When one bolt 72 is rotated, the other bolt 72 also rotates. The protective cover 74 is generally circular and is fitted onto the outer wall of the upper head 2 during installation. Sealing gaskets are provided at the contact points with the outer wall of the upper head 2 and at the connection points between the upper head 2 and the tower body 1. This is used to keep the screws that fix the tower body 1 and the upper head 2 in a relatively clean space to prevent the screws from rusting after long-term use. Through the cooperation of the fixing seat 71, bolts 72 and connecting column 73, the workers fix the protective cover 74 above the screws on the outer wall of the upper head 2, thereby improving the service life of the screws at the top of the plate distillation tower.

[0036] Furthermore, the outer wall of the connecting column 73 is rotatably connected to the limiting rod 731 through a sealed bearing. The outer wall of the limiting rod 731 is slidably engaged with a sliding groove 732, and the top of the sliding groove 732 is fixedly connected to the outer wall of the tower body 1.

[0037] In the specific implementation process, it is worth noting that the bottom of the limiting rod 731 is equipped with a sealed bearing and the top is a slider, which is slidably engaged with the slide groove 732 to limit the movement of the bolt 72, thereby improving the stability of the protective device 7 above the plate distillation tower.

[0038] Furthermore, the liquid removal device 8 includes a mounting base 81, a wire mesh demister 82, and a mounting ring 83. The mounting base 81 is fixedly connected to the upper inner wall of the tower body 1; the wire mesh demister 82 is attached to the inner wall of the mounting base 81; the mounting ring 83 is fixedly connected to the top of the mounting base 81, and its bottom is attached to the top of the wire mesh demister 82. The mounting base 81 and the mounting ring 83 work together to achieve the purpose of quickly replacing the wire mesh demister 82.

[0039] In the specific implementation process, it is worth noting that the mounting base 81 is generally circular and fixed to the inner wall of the tower body 1. The inner wall of the mounting base 81 has an installation groove, into which the wire mesh demister 82 is placed. The installation groove also has threaded holes for fixing with the mounting ring 83. The mounting ring 83 and the mounting base 81 are used in conjunction with screws, and a wire mesh demister 82 is placed between them. The material of the wire mesh demister 82 can be titanium alloy, such as TA10 wire mesh demister. By using the mounting base 81 and the mounting ring 83, the operator can quickly replace the wire mesh demister 82, thereby enhancing the service life and operational stability of the plate distillation tower.

[0040] Furthermore, a liquid receiving tray 5 is fixedly connected to one side of the tray 3, and the outer wall of the liquid receiving tray 5 away from the tray 3 is fixedly connected to the inner wall of the tower body 1. A downcomer 6 is fixedly connected to the outer wall of the tray 3 away from the liquid receiving tray 5, and the outer wall of the downcomer 6 away from the tray 3 is fixedly connected to the inner wall of the tower body 1. A buffer plate 61 is fixedly connected to the inner wall of the downcomer 6.

[0041] In the specific implementation process, it is worth noting that the tray 3, the receiving pan 5, and the downcomer 6 form a disc, which is fixedly connected to the inner wall of the tower body 1. There are multiple such discs, and the number can be set according to actual needs. Each downcomer 6 has two buffer plates 61 fixed inside. The buffer plates 61 can prevent excessive foaming when the liquid flows from the upper downcomer 6 to the lower receiving pan 5, reduce the impact of foam on mass transfer efficiency, and improve the mass transfer efficiency of the plate distillation tower. It is understood that when selecting the above components, components made of appropriate materials can be selected according to actual needs, such as stainless steel.

[0042] Specifically, when the protective device 7 needs to be installed, the worker will fit the protective cover 74 onto the outer wall of the upper end cap 2 until the sealing gasket on the inner wall of the protective cover 74 is completely in contact with the outer wall of the upper end cap 2. At this time, the worker will rotate the bolt 72 on the fixing seat 71 above the outer wall of the tower body 1 clockwise with a wrench. As the worker rotates, the bolt 72 on the side closer to the tower body 1 will gradually move away from the threaded hole on the outer wall of the fixing seat 71. The bolt 72 on the side closer to the tower body 1 will drive the connecting column 73 to rotate. The connecting column 73 will drive the limiting rod 731 above the outer wall to move in the slide groove 732. The connecting column 73 will also drive the bolt 72 on the other side to rotate and move closer to the threaded hole on the inner wall of the protective cover 74. It can be understood that when fitting the protective cover 74, the threaded hole on its inner wall needs to be aligned with the bolt 72. This can be done manually. The bolt 72 on the side closer to the protective cover 74 will gradually move away from the threaded hole on the outer wall of the tower body 1. As the bolt 72 gradually enters the threaded hole on the inner wall of the protective cover 74, after it is tightened on one side, the bolt 72 on the other side near the fixing seat 71 has not completely left the threaded hole on the outer wall of the fixing seat 71. At this time, the protective cover 74 is fixed to the outer wall of the connection between the tower body 1 and the upper end cap 2. The bolts 72 in the other three directions are the same. When it is necessary to remove the protective device 7, turn the bolt 72 counterclockwise to completely remove it from the protective cover 74 and then remove the protective cover 74. When it is necessary to replace the liquid removal device 8 inside the tower body 1, the operator removes the upper end cap 2 and then uses the plate to rotate the four screws fixed to the inner wall of the mounting ring 83 counterclockwise to remove the mounting ring 83. Then, the old wire mesh demister 82 is removed and replaced with a new wire mesh demister 82. After that, the mounting ring 83 is re-fixed to the inner wall of the mounting seat 81 with screws.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plate distillation column, comprising a column body (1), characterized in that: The top of the tower body (1) is fixedly connected to an upper end cap (2), and the top of the upper end cap (2) is connected to an outlet pipe (21). The interior of the tower body (1) is fixedly connected to a tower plate (3), and the surface of the tower plate (3) is provided with ventilation holes (31). The plate distillation tower also includes: Adjustment device (4) is installed on the top of the tray (3); Protective device (7) is installed on the outer wall of the tower body (1); The liquid removal device (8) is installed inside the tower body (1); Among them, the opening angle of the vent (31) is adjusted by the adjustment device (4), the screws on the outer wall of the upper end cap (2) are protected by the protective device (7), and the interior of the tower body (1) is defoamed by the liquid removal device (8). The regulating device (4) includes: Multiple flow guide blocks (41) are provided, all of which are fixedly connected to the top of the tower plate (3); Multiple limiting plates (42) are provided, respectively located on the front and rear sides of each of the flow guide blocks (41), and their bottoms are fixedly connected to the top of the tower plate (3); An adjustment plate (43) is provided for each of the guide blocks (41) and is rotatably connected between the two limiting plates (42) by a pin. Multiple limiting blocks (44) are provided, which are fixedly connected to the front and rear sides of each of the adjusting plates (43) respectively, and are slidably connected to the outer wall grooves of the adjacent side of the two limiting plates (42); The liquid is guided by the flow guide block (41), and the opening angle of the vent hole (31) on the tower plate (3) is adjusted by the cooperation of the limiting plate (42), the adjusting plate (43) and the limiting block (44).

2. The plate distillation column according to claim 1, characterized in that: The bottom of the tower body (1) is fixedly connected to a base (9), the outer wall of the tower body (1) is connected to a return pipe (11), the outer wall of the tower body (1) is connected to a feed pipe (12) located below the return pipe (11), the outer wall of the tower body (1) is connected to an air inlet pipe (13) located below the feed pipe (12), the bottom of the tower body (1) is connected to a discharge pipe (14), and the end of the discharge pipe (14) penetrates the outer wall of the base (9).

3. A plate distillation column according to claim 1, characterized in that: The protective device (7) includes: The fixing seat (71) is fixedly connected to the upper part of the outer wall of the tower body (1); The protective cover (74) is fitted onto the outer wall of the upper end cap (2) and extends to the upper part of the outer wall of the tower body (1); Two bolts (72) are provided and are arranged symmetrically. One bolt (72) is threaded to the inner wall of the fixing seat (71), and the other bolt (72) is threaded to the inner wall of the protective cover (74). The connecting column (73) is fixedly connected between two bolts (72); The protective cover (74) is fixed above the screw on the outer wall of the upper end cap (2) by the cooperation of the fixing seat (71), bolt (72) and connecting column (73).

4. A plate distillation tower according to claim 3, characterized in that: The outer wall of the connecting column (73) is rotatably connected to the limiting rod (731) through a sealed bearing. The outer wall of the limiting rod (731) is slidably engaged with a sliding groove (732). The top of the sliding groove (732) is fixedly connected to the outer wall of the tower body (1).

5. A plate distillation column according to claim 1, characterized in that: The liquid removal device (8) includes: Mounting base (81) is fixedly connected to the upper inner wall of the tower body (1); The wire mesh demister (82) is attached to the inner wall of the mounting base (81); The mounting ring (83) is fixedly connected to the top of the mounting base (81) and its bottom is attached to the top of the wire mesh demister (82); The purpose of quickly replacing the wire mesh demister (82) is achieved through the cooperation of the mounting base (81) and the mounting ring (83).

6. A plate distillation column according to claim 1, characterized in that: A liquid receiving tray (5) is fixedly connected to one side of the tray (3). The outer wall of the liquid receiving tray (5) away from the tray (3) is fixedly connected to the inner wall of the tower body (1). A downcomer (6) is fixedly connected to the outer wall of the tray (3) away from the liquid receiving tray (5). The outer wall of the downcomer (6) away from the tray (3) is fixedly connected to the inner wall of the tower body (1). A buffer plate (61) is fixedly connected to the inner wall of the downcomer (6).

Images