Distillation separation tower system
By designing multiple parallel connected condensation towers in the distillation tower system and optimizing material reflow with reflux ratio controllers, the problem of low cooling efficiency of condensation towers in existing distillation towers is solved, and more efficient distillation and higher yields are achieved.
Patent Information
- Application Number
- CN202520576486.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2035-03-31
AI Technical Summary
The condensation columns in existing distillation towers have low cooling efficiency for fractions, resulting in low yields and high energy consumption of distilled products.
A distillation separation tower system is designed, including a distillation tower, a condensation assembly and a receiving assembly. The condensing assembly consists of at least two condensing towers arranged in parallel, and is interconnected by pipes, and the reflux ratio controller is used to control the reflux of material between the condensing towers.
The distillation efficiency and yield are improved through multi-stage condensation, reducing the volatilization to the outside fractions, and reducing energy consumption.
Smart Images
Figure CN222829075U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of distillation technology, and in particular to a distillation separation tower system. Background Art
[0002] In the related art, the fraction evaporated from the distillation tower usually needs to be cooled or condensed in a condensation tower before flowing into the next process. However, the cooling efficiency of the fraction in the current condensation tower is low, and the amount of volatilization during the condensation process is large, resulting in a low yield of the final distillation product and high energy consumption. Utility Model Content
[0003] In order to at least solve some of the defects mentioned in the related art, the present application provides a distillation tower separation system.
[0004] In order to achieve the above-mentioned object, the present application provides a distillation separation tower system, comprising a distillation tower, a condensation assembly and a receiving assembly. The condensation assembly is connected to the top outlet of the distillation tower, and the condensation assembly comprises at least two condensation towers, the two condensation towers are arranged in parallel on one side of the distillation tower, and the two condensation towers are connected to each other through pipelines. At least one of the condensation towers away from the distillation tower is provided with an exhaust gas discharge port. The receiving assembly comprises a reflux ratio controller and a receiving tank, and the receiving tank is connected to one of the condensation towers through the reflux ratio controller.
[0005] Furthermore, the condensation tower arranged close to the distillation tower is a first condenser, the reflux ratio controller is arranged between the first condenser and the receiving tank, and the reflux ratio controller is also connected to the top of the distillation tower through a pipeline.
[0006] Furthermore, the condensation tower arranged on the side of the first condenser away from the distillation tower is a second condenser, the first condenser is connected to the second condenser through a pipeline, and a tail gas discharge port is arranged on the side of the second condenser away from the distillation tower.
[0007] Furthermore, at least two receiving tanks are provided, and the plurality of receiving tanks are selectively connected to the reflux ratio controller via valves.
[0008] Furthermore, the receiving assembly also includes a tail liquid tank, and the tail liquid tank is connected to at least one of the receiving tanks through a pipeline.
[0009] Furthermore, a tail gas condenser is provided between the tail liquid tank and the receiving tank, and a tail gas discharge port is provided at the top of the tail gas condenser.
[0010] Furthermore, a vacuum pump is provided between the receiving tank and the tail gas condenser, and the vacuum pump transports the material in the receiving tank to the tail gas condenser through negative pressure.
[0011] Furthermore, the inner diameter of the distillation tower is L1, satisfying: L1 ≥ 40 cm; the total length of the distillation tower is L2, satisfying: L2 ≥ 6 m.
[0012] Furthermore, at least one sampling port is provided between the reflux ratio controller and the receiving component.
[0013] Furthermore, the sampling port is arranged on the outlet pipe of the reflux ratio controller.
[0014] Through the above technical scheme, when the distillation tower separation system of the present application is used to distill the material, the material to be distilled is introduced into the distillation tower, the distillation tower is heated, and the distillate is introduced into the condensation tower from the outlet at the top of the distillation tower. The distilled distillate is initially cooled through the condensation tower, and the partially cooled part is controlled by the reflux ratio controller to flow into the receiving tank; the partially uncooled distillate continues to flow to the next condensation tower and is further cooled by the next condensation tower. In the next condensation tower, the partially cooled distillate is refluxed back into the first condensation tower and is controlled by the reflux ratio controller to flow to the receiving tank. The uncooled distillate continues to repeat the above operation until cooling is completed.
[0015] The distillation tower separation system of the present application can effectively condense the distilled fractions through multiple condensation towers arranged in parallel, thereby reducing the amount of materials refluxed into the distillation towers to improve the efficiency of distillation. In addition, multiple condensation towers can also reduce the fractions volatilized to the outside, thereby improving the yield of the distillation of the present application.
[0016] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic structural diagram of a distillation separation tower system from one perspective provided in one embodiment of the present application.
[0019] icon:
[0020] 100-distillation tower; 200-condensation assembly; 210-first condenser; 220-second condenser; 300-receiving assembly; 310-reflux ratio controller; 320-receiving tank; 330-tail liquid tank; 410-tail gas discharge port; 420-tail gas condenser; 430-vacuum pump. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0022] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0023] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0024] The present application provides a distillation separation tower system to solve the problems of low efficiency and low yield in the distillation process in the related art.
[0025] See also Figure 1 , a distillation separation tower system, comprising a distillation tower 100, a condensation assembly 200 and a receiving assembly 300. The condensation assembly 200 is connected to the top outlet of the distillation tower 100, and the condensation assembly 200 comprises at least two condensation towers, the two condensation towers are arranged in parallel on one side of the distillation tower 100, and the two condensation towers are connected to each other through a pipeline. At least one condensation tower away from the distillation tower 100 is provided with an exhaust gas discharge port 410. The receiving assembly 300 comprises a reflux ratio controller 310 and a receiving tank 320, and the receiving tank 320 is connected to one of the condensation towers through the reflux ratio controller 310.
[0026] Generally speaking, when distilling materials, the distillation tower 100 is usually connected to a single condensation tower. After the distillate evaporated from the distillation tower 100 is cooled by the condensation tower, part of the condensed distillate flows into the next process for temporary storage, part of the uncondensed distillate flows back into the distillation tower 100, and part of the condensed distillate directly flows out of the condensation tower and evaporates into the air, resulting in lower efficiency, lower yield and higher energy consumption of the final distillation product.
[0027] In this embodiment, the material to be distilled is passed into the distillation tower 100, and the jacket of the distillation tower 100 is heated to heat the distillation tower 100, so that the temperature in the distillation tower 100 reaches a predetermined temperature, so as to distill out a specific fraction in the material. The distilled fraction moves from the top of the distillation tower 100 along the channel to the condensation tower, and after being condensed by the condensation tower, the fraction that has been partially condensed is controlled by the reflux ratio controller 310 and transported to the receiving tank 320. The material that has not been fully condensed continues to flow to the next condensation tower for condensation. After the condensation is completed, since multiple condensation towers are arranged in parallel, the fraction that has been fully condensed will fall back into the first condensation tower, and will be controlled by the reflux ratio controller 310 and transported to the receiving tank 320. The material that has not been fully condensed in the next condensation tower will volatilize into the outside air from the tail gas discharge port 410 on the condensation tower.
[0028] The distillation separation tower system of this embodiment condenses the fraction evaporated from the distillation tower 100 by multiple condensation towers, thereby improving the condensation efficiency, that is, improving the distillation efficiency, and making the distillation operation more efficient. The parallel condensation towers can ensure that the fraction will pass through multiple condensation towers in sequence, and fall back into the first condensation tower after condensation is completed, and be controlled by the reflux ratio controller 310 and transported to the receiving tank 320, thereby reducing the fraction volatilized to the outside, that is, improving the yield of the distillation operation.
[0029] It can be understood that in this embodiment, a cooling medium inlet and a cooling medium outlet are provided on the condensation tower to ensure the condensation effect of the condensation tower. At the same time, the cooling medium will not come into contact with the distillate in the condensation tower to avoid contamination of the distillate, thereby ensuring that the distillation operation of this embodiment can proceed normally.
[0030] In addition, it should be noted that, in this embodiment, each condensation tower can independently adjust the flow rate and temperature of the cooling medium as needed to adapt to different process requirements. For example, in some cases, the overall condensation efficiency can be improved by increasing the cooling capacity of a certain condensation tower. Moreover, in this embodiment, the number of condensation towers is not limited to two, and three, four or any other number can be set according to actual needs. The design of multi-stage condensation allows flexible adjustment of the energy distribution of each condensation tower to improve energy utilization.
[0031] In one embodiment, for example, Figure 1 As shown, the condensation tower arranged near the distillation tower 100 is the first condenser 210, and the reflux ratio controller 310 is arranged between the first condenser 210 and the receiving tank 320. The reflux ratio controller 310 is also connected to the top of the distillation tower 100 through a pipeline.
[0032] First, multiple condensation towers are arranged in parallel and interconnected to achieve multi-stage condensation and improve condensation efficiency. The first condenser 210 near the distillation tower 100 first performs preliminary condensation on the high-temperature steam, and the subsequent condensation tower further cools the incompletely condensed part to ensure that more fractions are condensed into liquid to improve the distillation yield. Through multi-stage condensation, the cooling load can be better distributed, avoiding the problem of overload or insufficient cooling of a single condensation tower, and improving the heat exchange efficiency of the entire system.
[0033] Secondly, the reflux ratio controller 310 is arranged between the first condenser 210 and the receiving tank 320, and is connected to the top of the distillation tower 100 through a pipeline, so as to directly monitor and adjust the amount of liquid flowing out of the first condenser 210, and ensure that the ratio between the reflux amount and the production amount meets the set value. In this way, the reflux ratio can be controlled more accurately and the separation effect can be optimized.
[0034] Furthermore, since the reflux ratio controller 310 is directly connected to the first condenser 210 and the top of the distillation tower 100, the reflux ratio controller 310 can quickly respond to changes in operating conditions according to actual conditions, maintain stable operation of the system of this embodiment, and reduce the impact of operating condition fluctuations on product quality.
[0035] Please continue reading Figure 1 , exemplarily, the condensation tower arranged on the side of the first condenser 210 away from the distillation tower 100 is the second condenser 220, the first condenser 210 is connected to the second condenser 220 through a pipeline, and the side of the second condenser 220 away from the distillation tower 100 is provided with a tail gas discharge port 410. The first condenser 210 is close to the distillation tower 100, and firstly performs preliminary condensation on the high-temperature steam. Due to the high temperature of the steam, the first condenser 210 can quickly condense most of the low-boiling components and reduce the temperature and pressure of the steam. The remaining steam after being processed by the first condenser 210 enters the second condenser 220 to further cool the incompletely condensed part. The second condenser 220 can work at a lower temperature to ensure that more fractions are condensed into liquids, thereby ensuring the yield of this embodiment. Through the two-stage condensation design, the fractions can be condensed into liquids to the maximum extent, and the uncondensed fractions can be reduced from volatilizing to the outside. The tail gas discharge port 410 is arranged on the second condenser 220 to ensure that only a very small part of the gas is discharged from the system, thereby significantly reducing the tail gas emission.
[0036] In one embodiment, for example, Figure 1As shown, at least two receiving tanks 320 are provided, and a plurality of receiving tanks 320 are selectively connected to the reflux ratio controller 310 through valves. By providing a plurality of receiving tanks 320, fractions of different boiling point ranges can be collected respectively. Exemplarily, one of the receiving tanks 320 is used to collect light fractions, such as low boiling point solvents, and one of the receiving tanks 320 is used to collect heavy fractions, such as high boiling point products. This can achieve efficient classification and management of a variety of products. In addition, different fractions usually have different uses and quality requirements, and classified collection helps to ensure that the purity and quality of each product meet specific standards.
[0037] In this embodiment, the receiving tank 320 can be flexibly switched according to production needs through the selective connection of the valve. For example, when a specific fraction needs to be collected preferentially within a certain period of time, the fraction can be directed to the corresponding receiving tank 320 by adjusting the valve without affecting the collection of other fractions. In addition, during the production process, if a receiving tank 320 fails or needs maintenance, the fraction can be directed to the spare receiving tank 320 by switching the valve to ensure the continuity and stability of production.
[0038] It is understandable that by setting up multiple receiving tanks 320 and reasonably allocating fractions, overflow problems caused by overloading of a single receiving tank 320 can be effectively avoided to ensure safe production. Classified collection of different fractions can reduce volatilization losses caused by mixed storage, especially when handling volatile components, which helps reduce environmental pollution risks.
[0039] In one embodiment, for example, Figure 1 As shown, the receiving assembly 300 further includes a tail liquid tank 330, which is connected to at least one receiving tank 320 through a pipeline. The tail liquid tank 330 is used to collect residues that have not been completely condensed or separated from the receiving tank 320. These residues may be high-boiling point components, impurities or other substances that are difficult to separate. The uncondensed fractions and residues are collected separately in the tail liquid tank 330 to prevent them from mixing into the main product receiving tank 320, thereby preventing product contamination and ensuring product quality.
[0040] In addition, the tail liquid tank 330 provides additional buffer capacity, which can continue to collect residues when the receiving tank 320 is full, avoiding overflow or production interruption due to overload. Moreover, even if a receiving tank 320 fails or requires maintenance, the tail liquid tank 330 can continue to collect residues as a backup container to ensure continuous operation of the system.
[0041] In one embodiment, for example, Figure 1As shown, a tail gas condenser 420 is further provided between the tail liquid tank 330 and the receiving tank 320, and a tail gas discharge port 410 is provided on the top of the tail gas condenser 420. The tail gas condenser 420 can further condense the incompletely condensed steam escaping from the receiving tank 320 or the tail liquid tank 330, ensuring that more fractions are condensed into liquids and reducing the volatilization of uncondensed fractions. Through further condensation, valuable fractions can also be recovered to the maximum extent, thereby improving the yield and economic benefits of the overall product.
[0042] The tail gas condenser 420 can effectively condense most of the uncondensed fractions, reduce the organic matter content in the tail gas, thereby reducing the tail gas emission and reducing the pollution to the environment.
[0043] The tail gas condenser 420 and the tail liquid tank 330 can also play a role of redundant protection, that is, during normal distillation operation, the condenser is required to condense the distillate and pass it into the receiving tank 320. In this embodiment, when a condenser fails, the other condensers can still continue to work. Even if all the condensers are temporarily unable to work, the tail gas condenser 420 can still continue to condense the distillate and temporarily pass it into the tail liquid tank 330 for storage, ensuring the continuity and reliability of the system of this embodiment.
[0044] In one embodiment, for example, Figure 1 As shown, a vacuum pump 430 is provided between the receiving tank 320 and the tail gas condenser 420, and the vacuum pump 430 transports the material in the receiving tank 320 to the tail gas condenser 420 through negative pressure. The vacuum pump 430 can efficiently pump the material in the receiving tank 320, including liquid and steam, to the tail gas condenser 420 by generating negative pressure. Compared with traditional methods such as gravity or pumping, negative pressure transmission can complete material transfer more quickly and stably. Negative pressure transmission can also ensure that the material in the receiving tank 320 is almost completely pumped away, reducing the accumulation of residues and improving material utilization.
[0045] The negative pressure environment generated by the vacuum pump 430 helps to lower the boiling point of the material, making some components that are originally difficult to condense easier to condense. Especially under low temperature conditions, negative pressure transmission can significantly improve the condensation efficiency of the tail gas condenser 420. Especially in this embodiment, when the distilled material is a high boiling point product, the negative pressure environment generated by the vacuum pump 430 can effectively ensure that the remaining uncondensed product is quickly condensed, thereby further improving the yield of this embodiment.
[0046] Negative pressure transmission can also effectively prevent the gas-liquid mixture from flowing back from the tail gas condenser 420 to the receiving tank 320, maintain the one-way flow of the system, and avoid contaminating the product in the receiving tank 320.
[0047] It is worth mentioning that in some cases, the vacuum pump 430 can reduce unnecessary energy consumption by optimizing the pressure setting. For example, in a low pressure environment, the boiling point of the material is reduced, and the required cooling energy is also reduced accordingly, thereby achieving energy saving effect.
[0048] In one embodiment, illustratively, the inner diameter of the distillation tower 100 is L1, satisfying: L1 ≥ 40 cm; the total length of the distillation tower 100 is L2, satisfying: L2 ≥ 6 m. By limiting the inner diameter and total length of the distillation tower 100, the separation effect and stability of the distillation operation of this embodiment are guaranteed. Specifically, the larger inner diameter provides more gas-liquid contact area, which helps to improve the mass transfer efficiency. More contact area means that the material transfer between the gas phase and the liquid phase is more sufficient, thereby improving the separation effect. The longer total length increases the residence time of the material in the tower, so that the gas and liquid phases have more time for sufficient contact and mass transfer, further improving the separation efficiency.
[0049] On this basis, a larger inner diameter can also reduce the gas velocity within a unit cross section and reduce the pressure drop of the gas phase through the tower, thereby reducing the risk of operating pressure fluctuations and enhancing the stability of the system. A longer tower body helps to better distribute the gas and liquid flow, ensuring a more uniform distribution of gas and liquid on each tower plate or packing layer, avoiding local overload or underload, and ensuring smooth operation.
[0050] In one embodiment, for example, Figure 1 As shown, at least one sampling port is provided between the reflux ratio controller 310 and the receiving component 300. Samples can be collected regularly or continuously through the sampling port for component analysis to ensure that various indicators such as the purity and quality of the product meet the expected standards. This is particularly important for processes that require strict control of product quality, such as pharmaceuticals, chemicals and other fields. In addition, real-time sampling can also help operators quickly understand the current process status and adjust operating parameters in a timely manner according to the analysis results, such as reflux ratio, temperature, pressure and other parameters to ensure stable product quality.
[0051] Furthermore, the data obtained through the sampling port can provide strong support for process optimization. For example, the reflux ratio, feed rate, tower top temperature and other parameters can be adjusted according to the sample analysis results to improve the separation efficiency and product yield. Accordingly, according to the sampling results, the operator can dynamically adjust the set value of the reflux ratio controller 310 to ensure that the system is always in the best state and reduce unnecessary energy consumption and material waste.
[0052] Please continue reading Figure 1, illustratively, the sampling port is provided on the outlet pipe of the reflux ratio controller 310. By providing the sampling port on the outlet pipe of the reflux ratio controller 310, the reflux liquid sample can be collected regularly or in real time for component analysis. It is important to be able to distinguish the fractions flowing out of the outlet pipe of the reflux ratio controller 310 and sample them before they fall into different receiving tanks 320 to ensure the sampling effect.
[0053] In this embodiment, multiple sampling ports can also be set according to different process requirements. By setting multiple sampling ports at different positions, comprehensive monitoring of the entire process can be achieved. For example, by setting a sampling port on the outlet pipe of the reflux ratio controller 310, the quality of the reflux liquid and the final product can be monitored separately to ensure the process stability at each stage. By setting a sampling port before the inlet of each receiving tank 320, the distillate passing into each receiving tank 320 can be sampled and tested.
[0054] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.
[0055] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A distillation separation tower system, characterized in that: include: Distillation tower (100); A condensation assembly (200), the condensation assembly (200) being in communication with the top outlet of the distillation tower (100), the condensation assembly (200) comprising at least two condensation towers, the two condensation towers being arranged in parallel on one side of the distillation tower (100), and the two condensation towers being in communication with each other via a pipeline; at least one of the condensation towers away from the distillation tower (100) being provided with an exhaust gas discharge port; A receiving component (300), wherein the receiving component (300) comprises a reflux ratio controller (310) and a receiving tank (320), wherein the receiving tank (320) is connected to one of the condensing towers via the reflux ratio controller (310).
2. The distillation separation tower system according to claim 1, characterized in that: The condensation tower arranged near the distillation tower (100) is a first condenser (210), the reflux ratio controller (310) is arranged between the first condenser (210) and the receiving tank (320), and the reflux ratio controller (310) is also connected to the top of the distillation tower (100) through a pipeline.
3. The distillation separation tower system according to claim 2, characterized in that: The condensation tower arranged on the side of the first condenser (210) away from the distillation tower (100) is a second condenser (220); the first condenser (210) and the second condenser (220) are connected via a pipeline; and a tail gas discharge port (410) is arranged on the side of the second condenser (220) away from the distillation tower (100).
4. The distillation separation tower system according to claim 1, characterized in that: At least two receiving tanks (320) are provided, and the plurality of receiving tanks (320) are selectively connected to the reflux ratio controller (310) via valves.
5. The distillation separation tower system according to claim 4, characterized in that: The receiving assembly (300) further comprises a tail liquid tank (330), wherein the tail liquid tank (330) is connected to at least one of the receiving tanks (320) via a pipeline.
6. The distillation separation tower system according to claim 5, characterized in that: A tail gas condenser (420) is further provided between the tail liquid tank (330) and the receiving tank (320), and a tail gas discharge port (410) is provided at the top of the tail gas condenser (420).
7. The distillation separation tower system according to claim 6, characterized in that: A vacuum pump (430) is provided between the receiving tank (320) and the tail gas condenser (420), and the vacuum pump (430) transports the material in the receiving tank (320) to the tail gas condenser (420) through negative pressure.
8. The distillation separation tower system according to claim 1, characterized in that: The inner diameter of the distillation tower (100) is L1, satisfying: L1 ≥ 40 cm; the total length of the distillation tower (100) is L2, satisfying: L2 ≥ 6 m.
9. The distillation separation column system according to any one of claims 1 to 8, characterized in that: At least one sampling port is provided between the reflux ratio controller (310) and the receiving component (300).
10. The distillation separation tower system according to claim 9, characterized in that: The sampling port is arranged on the outlet pipe of the reflux ratio controller (310).