Chemical preparation rectifying tower

Abstract

The utility model discloses a chemical preparation rectifying tower and belongs to the technical field of rectifying towers. A plurality of through holes are formed in the tops of the tower plates; floating valve assemblies are arranged on the circumferential inner walls of the through holes; a liquid outlet is formed in the bottom of the circumferential outer wall of the tower body; a backflow assembly is arranged at one end of the liquid outlet; according to the utility model, chloralkane is subjected to gas-liquid separation through heating, rising airflow pushes the top plate, so that a gap is formed between the top plate and the tower plate, when the air pressure in the tower body is lower, the top plate descends to prevent liquid from descending from the through hole to avoid liquid leakage, and when the tower body needs to be disassembled and cleaned, the two clamping plates are extruded to be taken out downwards, and the clamping plates are loosened after reinstallation; the resilience force of the spring drives the clamping plate to rotate outwards to abut against the circumferential inner wall of the through hole, and the quality of finished products is improved through re-vaporization of the backflow assembly. According to the structural design, the float valve is convenient to disassemble and clean, the rectification preparation of the ultra-pure chloralkane is prevented from being influenced, and the gas-liquid separation is more sufficient.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, and more specifically, to a chemical preparation distillation column. Background Technology

[0002] The preparation of ultrapure chloroalkanes requires the use of a distillation column, which is a tower-type gas-liquid contact device for distillation. It utilizes the property that the components in a mixture have different volatility, that is, different vapor pressures at the same temperature, to transfer the lighter components (low-boiling substances) in the liquid phase to the gas phase, while the heavier components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation.

[0003] The prior art patent document with publication number CN221867430U provides a distillation column. The device controls the rotation of the shaft by a drive motor. The shaft drives the movable half-plate to flip. When removing the packing material, the cover is first removed, the water collection box is taken out, and then the top layer of packing material is taken out. The top movable half-plate is then flipped to take out the next layer of packing material. The next layer of packing material is then flipped to take out the next layer of packing material. The above operation is repeated until the last layer of packing material is taken out. There is no need to transfer the column body, and the operation is convenient.

[0004] Although the device has many beneficial effects, the following problems still exist: During the use of the device, the float valve is not easy to disassemble and clean after a long period of use, which affects the quality of the finished product prepared by ultrapure chloroalkanes by distillation; secondly, the gas-liquid separation of the device is not sufficient during use and needs to be improved. In view of this, we propose a chemical preparation distillation column. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this invention is to provide a chemical preparation distillation column to solve the problems mentioned in the background art, such as the inconvenience of disassembling and cleaning the float valve after long-term use, the impact on the quality of the finished product prepared by ultrapure chloroalkanes distillation, and the insufficient gas-liquid separation.

[0007] 2. Technical Solution

[0008] A chemical preparation distillation column includes a column body with multiple trays on its inner circumference. Multiple through holes are formed at the top of each tray. A float valve assembly is provided on the inner circumference of each through hole. The float valve assembly includes a top plate. Fixed sleeves are provided on both sides of the bottom of the top plate. A pin is rotatably connected to the inner circumference of each fixed sleeve. A retaining plate is provided at both ends of the pin. A limiting ring is provided at the bottom of the outer circumference of each retaining plate. A fixed plate is provided in the middle of the bottom of the top plate. Springs are provided on both sides of the fixed plate, located on the inner wall of the retaining plate. A liquid outlet is provided at the bottom of the outer circumference of the column body. A reflux assembly is provided at one end of the liquid outlet. An air outlet is provided at the top of the column body.

[0009] Preferably, the reflux assembly includes a reboiler, the top of which is provided with a reflux pipe located on the outer circumference of the column body, the side wall of which is provided with a drain port, and the top of which is slidably connected with a cover plate, and one end of the top of the cover plate is provided with a handle.

[0010] Preferably, the bottom of the outer circumference of the tower body is provided with an air inlet, and the top of the outer circumference of the tower body is provided with a liquid inlet.

[0011] Preferably, the size of the top plate matches the size of the through hole, and the size and position of the card plate match the size and position of the top plate.

[0012] Preferably, the sidewall of the tray is provided with an overflow weir, and the height of the top portion of the overflow weir protruding from the tray is less than the height of the bottom portion of the overflow weir protruding from the tray.

[0013] Preferably, the adjacent trays are oriented in opposite directions, and the distance between adjacent trays is greater than the height of the portion of the overflow weir protruding from the tray.

[0014] Preferably, the reboiler is equipped with multiple heat exchange tubes, and the reboiler is a horizontal thermosiphon.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This invention uses heating to separate chloroalkanes into gas and liquid. The rising airflow pushes the top plate upward, creating a gap between the top plate and the tower plate for airflow. A limiting ring prevents the float valve assembly from dislodging. When the internal gas pressure of the tower is low, the top plate descends to prevent liquid from falling through the through hole, effectively avoiding leakage. When disassembly and cleaning are required, the two clamping plates are squeezed to retract inward and removed downward. After reinstallation, the clamping plates are released, and the spring's rebound force causes the clamping plates to rotate outward and abut against the inner wall of the through hole.

[0018] Secondly, the chloroalkane liquid is re-vaporized in the reboiler, and the vaporized two-phase flow returns to the inside of the tower through the reflux pipe, which facilitates the improvement of the finished product quality. The cover plate can be pulled out by pulling the handle, which facilitates the descaling inside the reboiler. The structural design of this utility model makes it easy to disassemble and clean the float valve, avoiding affecting the preparation of ultrapure chloroalkane distillation, and the gas-liquid separation is more complete. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the float valve assembly of this utility model;

[0021] Figure 3 This is a partial structural breakdown diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the recirculation component of this utility model;

[0023] Figure 5 This is a schematic diagram of the overall structure of this utility model;

[0024] The following are the labels in the diagram: 1. Tower body; 2. Tower plate; 3. Through hole; 4. Float valve assembly; 5. Liquid outlet; 6. Reflux assembly; 7. Gas outlet; 8. Gas inlet; 9. Liquid inlet; 10. Overflow weir; 401. Top plate; 402. Fixing sleeve; 403. Pin; 404. Clamping plate; 405. Limiting ring; 406. Fixing plate; 407. Spring; 601. Reboiler; 602. Reflux pipe; 603. Liquid outlet; 604. Cover plate; 605. Handle. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-5 This utility model provides a technical solution:

[0029] A chemical preparation distillation column includes a column body 1. Multiple trays 2 are fixedly arranged on the inner circumference of the column body 1. Multiple through holes 3 are opened on the top of the trays 2. A float valve assembly 4 is slidably connected to the inner circumference of the through holes 3. The float valve assembly 4 includes a top plate 401. Fixed sleeves 402 are fixedly arranged on both sides of the bottom of the top plate 401. A pin 403 is rotatably connected to the inner circumference of the fixed sleeve 402. A retaining plate 404 is fixedly arranged at both ends of the pin 403. A limiting ring 405 is fixedly arranged at the bottom of the outer circumference of the retaining plate 404. A fixed plate 406 is fixedly arranged in the middle of the bottom of the top plate 401. Springs 407 located on the inner wall of the retaining plate 404 are welded to both sides of the fixed plate 406. A liquid outlet 5 is fixedly arranged at the bottom of the outer circumference of the column body 1. A reflux assembly 6 is threadedly connected to one end of the liquid outlet 5. An air outlet 7 is fixedly arranged at the top of the column body 1. This invention uses heating to separate chloroalkanes into gas and liquid. The rising airflow pushes the top plate 401 upward, creating a gap between the top plate 401 and the tower plate 2 for airflow. The limiting ring 405 prevents the float valve assembly 4 from disengaging. When the internal air pressure of the tower body 1 is low, the top plate 401 descends to prevent liquid from falling through the through hole 3, effectively avoiding leakage. When disassembly and cleaning are required, the two clamping plates 404 are squeezed to retract inward and removed downward. After reinstallation, the clamping plates 404 are released, and the spring force 407 causes the clamping plates 404 to rotate outward, abutting against the inner circumference of the through hole 3.

[0030] Specifically, the reflux assembly 6 includes a reboiler 601. A reflux pipe 602 is fixed to the top of the reboiler 601 and located on the outer circumference of the tower body 1. A drain port 603 is fixed to the side wall of the reboiler 601. A cover plate 604 is slidably connected to the top of the reboiler 601, and a handle 605 is fixed to one end of the top of the cover plate 604. The chloroalkane liquid is re-vaporized through the reboiler 601, and the vaporized two-phase flow returns to the interior of the tower body 1 through the reflux pipe 602, which facilitates the improvement of the product quality. By pulling the handle 605, the cover plate 604 can be pulled out, which facilitates the descaling of the interior of the reboiler 601.

[0031] Furthermore, an air inlet 8 is fixedly provided at the bottom of the outer circumference of the tower body 1, and a liquid inlet 9 is fixedly provided at the top of the outer circumference of the tower body 1. Gas is transported through the air inlet 8, and chloroalkane liquid is transported through the liquid inlet 9.

[0032] It is worth noting that the dimensions of the top plate 401 match the dimensions of the through hole 3, and the dimensions and position of the clamping plate 404 match the dimensions and position of the top plate 401. The top plate 401 and clamping plate 404, which match the dimensions of the through hole 3, prevent the float valve assembly 4 from slipping.

[0033] It is worth noting that an overflow weir 10 is fixedly provided on the side wall of tray 2. The height of the top portion of the overflow weir 10 protruding from tray 2 is less than the height of the bottom portion of the overflow weir 10 protruding from tray 2. The overflow weir 10, with its top height being less than its bottom protruding portion from tray 2, facilitates an increase in liquid residence time and improves distillation efficiency.

[0034] In addition, the adjacent trays 2 are oriented in opposite directions, and the distance between adjacent trays 2 is greater than the height of the portion of the overflow weir 10 protruding from the bottom of tray 2. The opposite orientation of the adjacent trays 2 facilitates liquid flow to the next tray 2, preventing it from falling directly to the bottom.

[0035] Furthermore, multiple heat exchange tubes are fixedly installed inside the reboiler 601, and the reboiler 601 adopts a horizontal thermosiphon. The vaporization effect is improved by the heat exchange tubes inside the horizontal thermosiphon reboiler 601.

[0036] Working principle: When this device is used for chemical preparation distillation, chloroalkane liquid is supplied from inlet 9, and gas is supplied from inlet 8. Heating causes gas-liquid separation of the chloroalkane. The rising gas flow pushes the top plate 401 upward, creating a gap between the top plate 401 and the tray 2 for gas flow. The limiting ring 405 engages the tray 2. When the internal pressure of the column 1 is low, the top plate 401 descends to prevent liquid from falling through the through hole 3. After prolonged use, the two clamping plates 404 are compressed. The clamping plate 404 is retracted inward and removed downward for cleaning. After reinstalling the through hole 3, the clamping plate 404 is released. The rebound force of the spring 407 causes the clamping plate 404 to rotate outward and abut against the inner circumference of the through hole 3. Gas is output from the gas outlet 7, and liquid flows into the reboiler 601 from the liquid outlet 5 for re-vaporization. The vaporized two-phase flow returns to the interior of the tower body 1 through the return pipe 602. After long-term use, the handle 605 is pulled to remove the cover plate 604 to descale the heat exchange tubes inside the reboiler 601.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A chemical preparation distillation column, comprising a column body (1), characterized in that: The tower body (1) has multiple tower plates (2) on its inner circumference. Multiple through holes (3) are opened at the top of each tower plate (2). A float valve assembly (4) is provided on the inner circumference of each through hole (3). The float valve assembly (4) includes a top plate (401). Fixing sleeves (402) are provided on both sides of the bottom of the top plate (401). A pin (403) is rotatably connected to the inner circumference of each fixing sleeve (402). A retaining plate (4) is provided at both ends of the pin (403). 04), the bottom of the outer circumference of the card plate (404) is provided with a limiting ring (405), the bottom of the top plate (401) is provided with a fixing plate (406), the two side walls of the fixing plate (406) are provided with springs (407) located on the inner wall of the card plate (404), the bottom of the outer circumference of the tower body (1) is provided with a liquid outlet (5), one end of the liquid outlet (5) is provided with a reflux component (6), and the top of the tower body (1) is provided with an air outlet (7).

2. The chemical preparation distillation column according to claim 1, characterized in that: The reflux assembly (6) includes a reboiler (601), the top of which is provided with a reflux pipe (602) located on the outer circumference of the tower body (1), the side wall of the reboiler (601) is provided with a drain port (603), the top of the reboiler (601) is slidably connected with a cover plate (604), and one end of the top of the cover plate (604) is provided with a handle (605).

3. The chemical preparation distillation column according to claim 2, characterized in that: The tower body (1) has an air inlet (8) at the bottom of its circumferential outer wall and a liquid inlet (9) at the top of its circumferential outer wall.

4. The chemical preparation distillation column according to claim 3, characterized in that: The size of the top plate (401) matches the size of the through hole (3), and the size and position of the card plate (404) match the size and position of the top plate (401).

5. The chemical preparation distillation column according to claim 4, characterized in that: The side wall of the tower plate (2) is provided with an overflow weir (10), and the height of the part of the overflow weir (10) protruding from the tower plate (2) at the top is less than the height of the part of the overflow weir (10) protruding from the tower plate (2) at the bottom.

6. The chemical preparation distillation column according to claim 5, characterized in that: The adjacent trays (2) are oriented in opposite directions, and the distance between adjacent trays (2) is greater than the height of the portion of the overflow weir (10) protruding from the tray (2).

7. The chemical preparation distillation column according to claim 6, characterized in that: The reboiler (601) is equipped with multiple heat exchange tubes, and the reboiler (601) is a horizontal thermosiphon.

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