Low energy consumption rectifying column
By introducing separation and return components into a low-energy distillation column, and utilizing the linkage between the filter belt and the drive roller, as well as the high-frequency vibration of the filter plate, the problem of incomplete solid-liquid separation is solved, achieving efficient solid-liquid separation and storage volume utilization, and avoiding clogging and impurities carrying liquid.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG CHENYANG CHEM CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-24
AI Technical Summary
When processing chemical raw materials or products for pharmaceutical synthesis, existing low-energy distillation columns tend to accumulate wastewater and solid impurities at the bottom of the column. These impurities need to be periodically discharged through the drain port at the bottom of the distillation column. Furthermore, the scraper may carry the wastewater into the storage box while scraping the impurities, resulting in incomplete solid-liquid separation and affecting separation efficiency and storage capacity.
The design employs a separation component and a return water component. The linkage between the filter belt and the drive roller achieves continuous solid-liquid separation. Combined with the design of the scraper and filter plate, and the secondary filtration of the return tank, it ensures that impurities are accurately scraped off and liquid is returned. At the same time, the drive cam and linkage mechanism give the filter plate high-frequency micro-amplitude vibration, which breaks the adhesion between particles, promotes the sliding off of impurities and the precipitation of liquid.
It achieves high efficiency and continuity in solid-liquid separation, significantly improves separation efficiency, reduces the water content of impurities, increases the effective volume utilization of the storage box, and avoids the risk of solid-liquid mixing and discharge and blockage.
Smart Images
Figure CN224540996U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pharmaceutical intermediates technology, and more specifically, it relates to a low-energy distillation column. Background Technology
[0002] In the routine manufacturing of pharmaceutical intermediates, distillation columns are key equipment for the distillation and purification of chemical raw materials or products. Among them, low-energy distillation columns are widely used due to their advantages in energy recycling and waste heat recovery. Existing low-energy distillation columns mainly utilize energy integration methods such as heat pump technology and thermal integrated networks to pressurize and heat the low-temperature vapor at the top of the column into a heat source for the reboiler. At the same time, the waste heat of the high-temperature residual liquid at the bottom of the column and the condensate at the top of the column is utilized in stages, thereby significantly reducing energy consumption.
[0003] This utility model, with application number CN202420783591.3, relates to the field of medical distillation technology, and more particularly to a pharmaceutical intermediate distillation apparatus. It includes a distillation cylinder, a support frame at the bottom of which a filter box is fixed inside. A liquid outlet pipe is connected to the bottom of the distillation cylinder, extending its bottom end into the filter box. A filter screen is installed inside the filter box, with a collection net embedded at the right end of the filter screen. A fixed crossbar is located on the inner wall of the filter box near the top, and a screw is rotatably connected inside the fixed crossbar. One end of the screw extends out of the filter box and is equipped with a forward and reverse motor. In this utility model, waste residue can be separated during the discharge of the raw liquid, eliminating the need for separate separation work by personnel, making it convenient to use.
[0004] Based on the above, in existing low-energy distillation columns, when processing chemical raw materials or products for pharmaceutical synthesis, wastewater and solid impurities generated during distillation tend to settle at the bottom of the column, requiring periodic discharge through the drain port at the bottom of the distillation cylinder. Although some equipment is equipped with a filter screen at the drain port for solid-liquid separation, and a motor-driven scraper moves back and forth to clean impurities from the filter screen surface and scrape them into a side storage box to prevent clogging, the scraper's reciprocating scraping of impurities easily carries wastewater into the storage box simultaneously, resulting in incomplete solid-liquid separation. Furthermore, the liquid carried by the impurities not only increases weight but also occupies the effective volume of the storage box, affecting separation efficiency and storage capacity. Utility Model Content
[0005] To address the aforementioned technical problems, this invention provides a low-energy distillation column. This addresses the issue that in existing low-energy distillation columns, when processing chemical raw materials or products for pharmaceutical synthesis, wastewater and solid impurities generated during distillation tend to accumulate at the bottom of the column, requiring periodic discharge through the drain port at the lower end of the distillation cylinder. While some equipment incorporates a filter screen at the drain port for solid-liquid separation and uses a motor-driven scraper to reciprocate and clean impurities from the filter screen surface, scraping them into a side storage box to prevent clogging, the scraper's reciprocating scraping of impurities often carries wastewater into the storage box simultaneously. This results in incomplete solid-liquid separation, and the liquid carried by the impurities not only increases weight but also occupies the effective volume of the storage box, affecting separation efficiency and storage capacity.
[0006] The purpose and effectiveness of this low-energy distillation column are achieved by the following specific technical means:
[0007] A low-energy distillation column includes a distillation column body, a waste heat recovery mechanism, a separation box, a first motor, a second motor, a slag collection box, a separation component, and a water return component. The waste heat recovery mechanism is installed on the outside of the distillation column body; the separation box is located at the bottom of the distillation column body; the first motor is bolted to the front of the separation box; the second motor is fixedly installed on the rear of the separation box; the slag collection box is snapped onto the front of the separation box; the separation component is located inside the separation box; and the water return component is located inside the separation box.
[0008] Furthermore, the separation assembly includes a drain port and a connection port. The drain port is fixedly connected to the bottom of the distillation column body and the top of the separation tank. The connection port is fixedly connected to the right side of the separation tank.
[0009] Furthermore, the separation assembly also includes: a drive roller and a filter belt. The drive roller is provided in two sets, which are rotatably connected to both sides inside the separation box. One set of drive rollers is fixedly installed at one end of the first motor. The filter belt is installed on the outside of the two sets of drive rollers.
[0010] Furthermore, the separation assembly also includes a separation chamber and a return trough, wherein the separation chamber is located on the left side inside the separation box, and the return trough is located on one side of the separation chamber.
[0011] Furthermore, the separation assembly also includes a scraper and a filter plate, wherein the scraper is fixedly installed inside the separation chamber; and the filter plate is slidably connected inside the separation compartment.
[0012] Furthermore, the water return assembly includes a transmission cam, which is fixedly mounted on one end of the second motor.
[0013] Furthermore, the water return assembly also includes: a first connecting rod and a second connecting rod, the end of the first connecting rod being hinged to one end of the transmission cam; the top end of the second connecting rod being fixedly installed on one end of the filter plate, and the end of the second connecting rod being hinged to the top end of the first connecting rod.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] Firstly, this invention features a separation component that achieves continuous and efficient solid-liquid separation through the linkage design of the filter belt and the drive roller. After the solid-containing wastewater enters the separation tank through the drain port, the filter belt circulates under the drive of a motor, ensuring the wastewater is evenly dispersed on the filter surface. Compared to traditional static filters, this significantly improves the utilization rate of the filtration area and reduces the risk of clogging. Simultaneously, a fixed scraper precisely scrapes impurities onto the inclined filter plate. Combined with the secondary filtration design of the return trough, this ensures that the liquid carried by the impurities is fully returned, effectively preventing solid-liquid mixing and significantly improving separation efficiency.
[0016] Secondly, this invention features a water return assembly that, through the cooperation of a transmission cam and a linkage mechanism, imparts a high-frequency, micro-amplitude vibration function to the filter plate. During the impurity sliding process, the vibration disrupts the adhesion between particles, accelerating the slag discharge process and preventing accumulation and blockage. Simultaneously, the vibration promotes the rapid penetration of residual liquid in the impurities through the filter plate, flowing into the separation box via the return channel, achieving a deep optimization of solid-liquid separation. Compared to traditional static filtration, this further reduces the water content of impurities and improves the effective volume utilization rate of the storage box.
[0017] This invention has the advantages of rapid separation, avoiding clogging, and convenient use. It effectively avoids solid-liquid mixing and discharge, significantly improves separation efficiency, and can further reduce the water content of impurities, thereby increasing the effective volume utilization rate of the storage box. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the separation box structure of this utility model.
[0020] Figure 3 This is a schematic diagram of the first motor structure of this utility model.
[0021] Figure 4 This is a schematic diagram of the scraper structure of this utility model.
[0022] Figure 5 This is a schematic diagram of the second motor structure of this utility model.
[0023] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0024] 1. Distillation column body; 2. Waste heat recovery mechanism; 3. Separation box; 301. Drain port; 302. Connection port; 303. Separation chamber; 304. Reflux tank; 305. Scraper; 4. First motor; 401. Drive roller; 402. Filter belt; 5. Second motor; 501. Drive cam; 502. First connecting rod; 503. Second connecting rod; 504. Filter plate; 6. Slag collection box. Detailed Implementation
[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0026] Example 1:
[0027] As attached Figure 1 To be continued Figure 5 As shown:
[0028] This utility model provides a low-energy distillation column, including a distillation column body 1, a waste heat recovery mechanism 2, a separation box 3, a first motor 4, a second motor 5, a slag collection box 6, and a separation component. The waste heat recovery mechanism 2 is installed on the outside of the distillation column body 1; the separation box 3 is located at the bottom of the distillation column body 1; the first motor 4 is bolted to the front of the separation box 3; the second motor 5 is fixedly installed on the rear of the separation box 3; the slag collection box 6 is snapped into the front of the separation box 3; and the separation component is located inside the separation box 3.
[0029] The separation component includes a drain port 301 and a connection port 302. The drain port 301 is fixedly connected to the bottom of the main body 1 of the distillation column and the top of the separation tank 3. The connection port 302 is fixedly connected to the right side of the separation tank 3.
[0030] The separation assembly also includes: a drive roller 401 and a filter belt 402. Two sets of drive rollers 401 are provided, and the two sets of drive rollers 401 are rotatably connected to the two sides inside the separation box 3. One set of drive rollers 401 is fixedly installed at one end of the first motor 4. The filter belt 402 is installed on the outside of the two sets of drive rollers 401.
[0031] The separation assembly also includes a separation chamber 303 and a return channel 304. The separation chamber 303 is located inside the separation box 3 on the left side; the return channel 304 is located on one side of the separation chamber 303.
[0032] The separation assembly also includes a scraper 305 and a filter plate 504. The scraper 305 is fixedly installed inside the separation chamber 3, and the filter plate 504 is slidably connected inside the separation compartment 303.
[0033] The specific usage and function of this embodiment are as follows:
[0034] The first motor 4 drives a set of transmission rollers 401 to rotate, and the transmission rollers 401 drive the filter belt 402 to rotate back and forth. The second set of transmission rollers 401 plays a guiding role when the filter belt 402 rotates.
[0035] After the distillation column 1 completes the distillation operation, the bottom drain port 301 is opened, and the solid wastewater enters the separation tank 3 vertically through the drain port 301, first impacting the uniformly rotating filter belt 402. Driven by the first motor 4, the transmission roller 401 drives the filter belt 402 to circulate, so that the wastewater is evenly distributed on the surface of the filter belt 402, realizing the initial separation of solid and liquid. Solid impurities are trapped on the surface of the filter belt 402, while the filtrate flows through the mesh into the bottom of the separation tank 3 and is transported to the subsequent water treatment unit through the right-side connection port 302.
[0036] As the filter belt 402 continues to operate, the trapped impurities are transported to the scraper 305, where the fixed scraper 305 scrapes them off onto the inclined filter plate 504 in the separation chamber 303. The inclined design of the filter plate 504 causes the impurities to automatically slide down to the slag collection box 6 under gravity, achieving continuous slag discharge. At the same time, the secondary filtration effect of the filter plate 504 causes the residual mother liquor in the impurities to further precipitate out and return to the separation box 3 through the return tank 304, and finally achieve full recovery through the connection port 302.
[0037] Example 2:
[0038] Based on Example 1, such as Figures 1 to 5 As shown, it also includes a water return assembly, which is located inside the separator 3.
[0039] The water return assembly includes a transmission cam 501, which is fixedly mounted on one end of the second motor 5.
[0040] The water return assembly also includes: a first connecting rod 502 and a second connecting rod 503. The end of the first connecting rod 502 is hinged to one end of the transmission cam 501. The top end of the second connecting rod 503 is fixedly installed on one end of the filter plate 504, and the end of the second connecting rod 503 is hinged to the top end of the first connecting rod 502.
[0041] The specific usage and function of this embodiment are as follows:
[0042] When the second motor 5 starts, its output shaft drives the transmission cam 501 to perform uniform circular motion, and the outer contour of the cam pushes the first connecting rod 502 to oscillate periodically. The first connecting rod 502 drives the second connecting rod 503 to reciprocate in the vertical direction through a hinge structure, which in turn causes the filter plate 504 in the separation chamber 303 to generate high-frequency micro-amplitude vibration. On the one hand, the reciprocating vibration of the filter plate 504 can break the adhesion between impurity particles, causing them to slide down the inclined plate surface at an accelerated speed to the slag collection box 6, avoiding poor slag discharge due to accumulation; on the other hand, the vibration can accelerate the precipitation of residual liquid in the impurities. Under the action of inertial force, the liquid penetrates the mesh of the filter plate 504 and flows into the bottom of the separation box 3 through the return channel 304, thereby improving the solid-liquid separation efficiency.
[0043] The following points should be noted in this article:
[0044] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.
[0045] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.
[0046] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.
Claims
1. A low-energy-consumption distillation column, characterized in that: The low-energy distillation column includes a distillation column body (1), a waste heat recovery mechanism (2), a separation box (3), a first motor (4), a second motor (5), a slag collection box (6), a separation component, and a water return component. The waste heat recovery mechanism (2) is installed on the outside of the distillation column body (1); the separation box (3) is located at the bottom of the distillation column body (1); the first motor (4) is bolted to the front of the separation box (3); the second motor (5) is fixedly installed on the rear of the separation box (3); the slag collection box (6) is snapped into the front of the separation box (3); the separation component is located inside the separation box (3); and the water return component is located inside the separation box (3).
2. The low-energy distillation column as described in claim 1, characterized in that: The separation assembly includes a drain port (301) and a connection port (302). The drain port (301) is fixedly connected to the bottom of the main body (1) of the distillation column and the top of the separation tank (3). The connection port (302) is fixedly connected to the right side of the separation tank (3).
3. The low-energy distillation column as described in claim 2, characterized in that: The separation assembly also includes: a drive roller (401) and a filter belt (402). The drive roller (401) is provided in two sets, and the two sets of drive rollers (401) are rotatably connected to the two sides inside the separation box (3). One set of drive rollers (401) is fixedly installed at one end of the first motor (4). The filter belt (402) is installed on the outside of the two sets of drive rollers (401).
4. The low-energy distillation column as described in claim 2, characterized in that: The separation assembly further includes a separation chamber (303) and a return channel (304), wherein the separation chamber (303) is located on the left side inside the separation box (3); and the return channel (304) is located on one side of the separation chamber (303).
5. The low-energy distillation column as described in claim 2, characterized in that: The separation assembly further includes a scraper (305) and a filter plate (504), wherein the scraper (305) is fixedly installed inside the separation chamber (3); and the filter plate (504) is slidably connected inside the separation chamber (303).
6. The low-energy distillation column as described in claim 1, characterized in that: The water return assembly includes a transmission cam (501), which is fixedly mounted on one end of the second motor (5).
7. The low-energy distillation column as described in claim 6, characterized in that: The water return assembly further includes: a first connecting rod (502) and a second connecting rod (503), the end of the first connecting rod (502) being hinged to one end of the transmission cam (501); the top end of the second connecting rod (503) being fixedly installed on one end of the filter plate (504), and the end of the second connecting rod (503) being hinged to the top end of the first connecting rod (502).