Continuous multistage rectification device

Abstract

The utility model discloses a continuous multi-stage rectification device which comprises a rectification tower mechanism, a steam generator is mounted on the left side of the rectification tower mechanism, and the conveying end of the steam generator is connected with a conveying pipe penetrating through an inner cavity of the rectification tower mechanism; the rectifying tower mechanism comprises a tower body and a rectifying filler mechanism mounted in an inner cavity of the tower body, a reflux tank is mounted on the left side of the tower body, a condenser is mounted on the right side of the tower body, and a feeding port is formed in the bottom of the left side of the tower body. According to the rectification device in the technical scheme, on the basis of continuous multi-stage rectification, coking substances in pores of the silk screen filler are softened through the synergistic effect of the L-shaped steam pipe and the booster fan, and the mass transfer uniformity of a filler layer is improved; in cooperation with a high-frequency vibration motor on the filler, adhesion of coking substances can be effectively destroyed, continuous self-cleaning is achieved, and the operation cycle is prolonged; the device is guaranteed to stably maintain high-purity separation, and the problem that the rectification purity is gradually reduced along with working conditions due to filler blockage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage distillation column technology, specifically to a continuous multi-stage distillation device. Background Technology

[0002] Multistage continuous distillation columns are highly efficient chemical separation equipment. Their core function lies in achieving continuous, high-purity separation of mixtures through multiple stages of trays or packing. Continuous multistage distillation columns utilize the differences in volatility of components. A reboiler heats the bottom material to generate steam. During its ascent, the steam comes into countercurrent contact with the reflux liquid on the surface of the trays or packing, achieving multiple partial vaporization and condensation. Highly volatile components gradually concentrate in the gas phase, while lowly volatile components remain in the liquid phase, ultimately yielding high-purity light and heavy components at the top and bottom of the column, respectively. Particularly in fine chemicals, pharmaceuticals, and new energy materials, continuous multistage distillation serves as a core separation method, and its efficiency directly impacts product quality and energy consumption.

[0003] However, traditional distillation units have some significant drawbacks during operation: the primary function of the packing material inside the distillation column is to provide a large contact surface area to promote mass and heat transfer between vapor and liquid. When the packing surface is clogged with coking deposits, its effective mass transfer area decreases, leading to a decline in mass transfer efficiency and impacting the unit's operating cycle, necessitating a cleaning interval of only 3-5 days. To address these issues, those skilled in the art propose a solution for a continuous multi-stage distillation unit. Utility Model Content

[0004] The purpose of this utility model is to provide a technical solution for a continuous multi-stage distillation apparatus to address the shortcomings mentioned in the background art. To overcome the drawbacks and defects described in the background art, this technical solution includes the following:

[0005] It includes a distillation column mechanism, a steam generator is installed on the left side of the distillation column mechanism, and the delivery end of the steam generator is connected to a delivery pipe that penetrates the inner cavity of the distillation column mechanism;

[0006] The distillation column mechanism includes a column body, a distillation packing mechanism installed in the inner cavity of the column body, a reflux tank installed on the left side of the column body, a condenser installed on the right side of the column body, a feed port provided at the bottom left side of the column body, a reboiler installed at the bottom right side of the column body, and a discharge port provided at the top of the column body.

[0007] The distillation packing mechanism includes a ceramic ring, a metal wire mesh fixedly connected inside the ceramic ring, and two support seats fixedly connected to the upper surface of the ceramic ring, and a high-frequency vibration motor is fixed on the top surface of each support seat.

[0008] The end of the conveying pipe furthest from the steam generator is connected to a steam outlet pipe, and a booster fan is installed inside the steam outlet pipe.

[0009] As a preferred embodiment of this utility model: the end of the reflux tank away from the column body is connected to a reflux pump, and the end of the reboiler away from the column body is connected to a bottom liquid pump.

[0010] As a preferred embodiment of this utility model, the outer surface of the ceramic ring is locked to the top surface of the inner cavity of the tower body by bolts.

[0011] As a preferred embodiment of this utility model, the support bases are all arranged in a left-right mirror symmetrical manner with the central axis of the ceramic ring as the base point.

[0012] As a preferred embodiment of this utility model: the high-frequency vibration motors are all high-temperature resistant vibration motors, used to vibrate and remove coking material from the gaps inside the metal wire mesh.

[0013] As a preferred embodiment of this utility model: the steam outlet pipe is L-shaped as a whole, and the end of the steam outlet pipe away from the conveying pipe is located above the distillation packing mechanism.

[0014] As a preferred embodiment of this utility model: the air delivery direction of the booster fan is towards the distillation packing mechanism, and the booster fan is a high-temperature resistant fan.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] The distillation unit in this technical solution, based on continuous multi-stage distillation, softens the coking material in the pores of the wire mesh packing through the synergistic action of the L-shaped steam pipe and the booster fan, thereby improving the mass transfer uniformity of the packing layer. In conjunction with the high-frequency vibration motor on the packing, it can effectively break the adhesion of coking material, achieve continuous self-cleaning, and extend the operating cycle. This ensures that the unit can stably maintain high-purity separation and avoids the problem of distillation purity gradually decreasing with operating conditions due to packing blockage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of a multi-stage continuous distillation column;

[0019] Figure 2 This is a schematic diagram of the internal structure of a multi-stage continuous distillation column;

[0020] Figure 3 This is a schematic diagram of a distillation packing mechanism;

[0021] Figure 4 This is a schematic diagram of a steam unblocking mechanism.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Distillation column structure; 11. Column body; 12. Condenser; 13. Discharge port; 14. Distillation packing structure; 141. Ceramic ring; 142. Metal wire mesh; 143. Support base; 144. High-frequency vibration motor; 15. Reflux tank; 16. Feed port; 17. Reboiler; 2. Steam generator; 3. Conveying pipe; 4. Booster fan; 5. Steam outlet pipe. Detailed Implementation

[0024] To provide a clearer explanation and description of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.

[0025] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of each embodiment. Specific details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures. The disclosures of various publications, patents, and published patent specifications cited herein are incorporated herein by reference in their entirety. The technical solutions of this utility model will be clearly and completely described below in conjunction with embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model.

[0026] Example 1: A continuous multi-stage distillation apparatus, wherein a steam generator 2 is installed on the left side of the distillation column mechanism 1, and the steam generated by the steam generator 2 is delivered to the inner cavity of the distillation column mechanism 1 through a delivery pipe 3. The distillation column mechanism 1 includes a column body 11, and a distillation packing mechanism 14 is installed in the inner cavity of the column body 11. A reflux tank 15 is installed on the left side of the column body 11, a condenser 12 is installed on the right side, a feed port 16 is set at the bottom of the left side, a reboiler 17 is installed at the bottom of the right side, and a discharge port 13 is set at the top. The distillation packing mechanism 14 consists of a ceramic ring 141, a metal wire mesh 142 fixedly connected inside the ceramic ring 141, and two support seats 143 fixedly connected to the upper surface of the ceramic ring 141. A high-frequency vibration motor 144 is fixed on the top surface of each support seat 143. The end of the delivery pipe 3 away from the steam generator 2 is connected to a steam outlet pipe 5, and a booster fan 4 is installed in the inner cavity of the steam outlet pipe 5. The end of the reflux tank 15 furthest from the column body 11 is connected to a reflux pump, and the end of the reboiler 17 furthest from the column body 11 is connected to a bottom liquid pump. The outer surface of the ceramic ring 141 is bolted to the top surface of the inner cavity of the column body 11. The support base 143 is arranged in a mirror-symmetrical configuration with the central axis of the ceramic ring 141 as the reference point. The high-frequency vibration motor 144 is a high-temperature resistant vibration motor used to vibrate and remove coking material from the gaps inside the metal wire mesh 142. The steam outlet pipe 5 is L-shaped, with its end furthest from the delivery pipe 3 located above the distillation packing mechanism 14.

[0027] The booster fan 4 directs airflow towards the distillation packing mechanism 14 and uses a high-temperature resistant fan. In actual operation, the steam generated by the steam generator 2 is evenly sprayed onto the distillation packing mechanism 14 via the conveying pipe 3 and the steam outlet pipe 5, under the action of the booster fan 4. The material enters the tower body 11 from the feed port 16 and undergoes multi-stage distillation through the distillation packing mechanism 14. The light components rise, are condensed by the condenser 12, and are discharged from the discharge port 13. The heavy components enter the reboiler 17 for recirculation and heating. Part of the liquid is returned to the tower via the reflux tank 15 and the reflux pump. The high-frequency vibration motor 144 vibrates periodically to prevent the metal wire mesh 142 from clogging.

[0028] Example 2: Based on Example 1, the structure of the distillation packing mechanism 14 is further optimized. The ceramic ring 141 is made of a special high-strength ceramic material, which has better corrosion resistance and wear resistance, and can adapt to harsher working conditions. The metal wire mesh 142 adopts a multi-layered wire mesh stacked structure with different mesh counts to increase the gas-liquid contact area and improve distillation efficiency. The support base 143 adopts an adjustable height structure and is threadedly connected to the ceramic ring 141, which facilitates the adjustment of the height of the high-frequency vibration motor 144 according to actual needs, so as to better exert the function of vibration to remove coking. In actual operation, this optimized distillation packing mechanism 14 can more effectively carry out gas-liquid mass transfer, improve the distillation effect, and at the same time, the adjustment function of the high-frequency vibration motor 144 can more accurately remove coking inside the metal wire mesh 142, extending the service life of the equipment.

[0029] Example 3: Based on Example 1 or Example 2, the steam delivery system is improved. A flow regulating valve and a pressure sensor are installed on the delivery pipe 3. The flow regulating valve controls the steam flow rate, and the pressure sensor monitors the steam pressure in real time and transmits the data to the control system. The control system automatically adjusts the opening of the flow regulating valve according to preset parameters to ensure that steam enters the distillation column 1 with a stable flow rate and pressure. Simultaneously, a temperature sensor is installed on the steam outlet pipe 5 to monitor the steam temperature. When the temperature is abnormal, the control system issues an alarm and takes corresponding measures. In actual operation, this improved steam delivery system can more accurately control the steam flow rate, pressure, and temperature, improving the stability and reliability of the distillation process and ensuring product quality.

[0030] Based on the above-described preferred technical solution, the workflow of this technical solution is explained as follows:

[0031] The material to be separated enters from the feed port 16 on the left side of the tower body 11. The steam generated by the steam generator 2 is transported to the booster fan 4 via the conveying pipe 3. The pressurized steam is evenly distributed above the distillation packing mechanism 14 through the horizontal section of the L-shaped steam outlet pipe 5. The metal wire mesh 142 inside the ceramic ring 141 forms a liquid film contact under the action of gravity. At the same time, the high-frequency vibration motor 144 on the support 143 vibrates at a frequency of 120Hz, causing the coking material in the wire mesh pores to fall off under the action of alternating stress. The steam and the descending liquid undergo mass transfer exchange in the packing layer, and the light component exits through the top discharge port 16. 3. The gas enters the condenser 12 for gradient condensation. The uncondensed gas is sent back to the middle section of the tower body 11 via the reflux tank 15 and the reflux pump. The bottom liquid is partially refluxed after being heated by the reboiler 17, and the remainder is discharged as heavy components. The high-temperature impeller of the booster fan 4 continuously pushes the steam towards the packing layer, which is coupled with the pulse vibration of the vibration motor 144, so that the packing surface always maintains efficient interphase contact. When the differential pressure sensor in the tower detects an increase in resistance, the control system automatically increases the amplitude of the vibration motor 144 to a preset threshold, and at the same time adjusts the heat load of the steam generator 2 to form a dynamic balance.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A continuous multi-stage rectification apparatus comprising a rectification column mechanism (1), characterized by: A steam generator (2) is installed on the left side of the distillation column mechanism (1), and the conveying end of the steam generator (2) is connected to a conveying pipe (3) that penetrates the inner cavity of the distillation column mechanism (1). The distillation column mechanism (1) includes a column body (11), a distillation packing mechanism (14) installed in the inner cavity of the column body (11), a reflux tank (15) installed on the left side of the column body (11), a condenser (12) installed on the right side of the column body (11), a feed port (16) provided at the bottom left side of the column body (11), a reboiler (17) installed at the bottom right side of the column body (11), and a discharge port (13) provided at the top of the column body (11). The distillation packing mechanism (14) includes a ceramic ring (141), a metal wire mesh (142) fixedly connected inside the ceramic ring (141), and two support seats (143) fixedly connected to the upper surface of the ceramic ring (141), and a high-frequency vibration motor (144) is fixed on the top surface of each support seat (143). The end of the conveying pipe (3) away from the steam generator (2) is connected to the steam outlet pipe (5), and a booster fan (4) is installed in the inner cavity of the steam outlet pipe (5).

2. A continuous multi-stage rectification apparatus according to claim 1, characterized by: The reflux tank (15) is connected to a reflux pump at the end away from the tower body (11), and the reboiler (17) is connected to a bottom liquid pump at the end away from the tower body (11).

3. A continuous multi-stage rectification apparatus according to claim 1, characterized by: The outer surface of the ceramic ring (141) is locked to the top surface of the inner cavity of the tower body (11) by bolts.

4. A continuous multi-stage rectification apparatus according to claim 1, characterized by: The support bases (143) are all arranged in a mirror-symmetrical manner with the central axis of the ceramic ring (141) as the base point.

5. A continuous multi-stage rectification apparatus according to claim 1, characterized by: The high-frequency vibration motors (144) are all high-temperature resistant vibration motors, used to vibrate and remove coking material from the gaps inside the metal wire mesh (142).

6. A continuous multi-stage rectification apparatus according to claim 1, wherein: The steam outlet pipe (5) is L-shaped, and the end of the steam outlet pipe (5) away from the conveying pipe (3) is located above the distillation packing mechanism (14).

7. A continuous multi-stage rectification apparatus according to claim 1, wherein: The booster fan (4) is directed toward the distillation packing mechanism (14), and the booster fan (4) is a high-temperature resistant fan.

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